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Don't set ELFOSABI_LINUX in dynamic ifunc-using executable.
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 /* Track GOT entries needed for a given symbol. We might need more
2530 than one got entry per symbol. */
2531 struct got_entry
2532 {
2533 struct got_entry *next;
2534
2535 /* The symbol addend that we'll be placing in the GOT. */
2536 bfd_vma addend;
2537
2538 /* Unlike other ELF targets, we use separate GOT entries for the same
2539 symbol referenced from different input files. This is to support
2540 automatic multiple TOC/GOT sections, where the TOC base can vary
2541 from one input file to another. After partitioning into TOC groups
2542 we merge entries within the group.
2543
2544 Point to the BFD owning this GOT entry. */
2545 bfd *owner;
2546
2547 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2548 TLS_TPREL or TLS_DTPREL for tls entries. */
2549 unsigned char tls_type;
2550
2551 /* Non-zero if got.ent points to real entry. */
2552 unsigned char is_indirect;
2553
2554 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2555 union
2556 {
2557 bfd_signed_vma refcount;
2558 bfd_vma offset;
2559 struct got_entry *ent;
2560 } got;
2561 };
2562
2563 /* The same for PLT. */
2564 struct plt_entry
2565 {
2566 struct plt_entry *next;
2567
2568 bfd_vma addend;
2569
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } plt;
2575 };
2576
2577 struct ppc64_elf_obj_tdata
2578 {
2579 struct elf_obj_tdata elf;
2580
2581 /* Shortcuts to dynamic linker sections. */
2582 asection *got;
2583 asection *relgot;
2584
2585 /* Used during garbage collection. We attach global symbols defined
2586 on removed .opd entries to this section so that the sym is removed. */
2587 asection *deleted_section;
2588
2589 /* TLS local dynamic got entry handling. Support for multiple GOT
2590 sections means we potentially need one of these for each input bfd. */
2591 struct got_entry tlsld_got;
2592
2593 /* A copy of relocs before they are modified for --emit-relocs. */
2594 Elf_Internal_Rela *opd_relocs;
2595
2596 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2597 the reloc to be in the range -32768 to 32767. */
2598 unsigned int has_small_toc_reloc;
2599 };
2600
2601 #define ppc64_elf_tdata(bfd) \
2602 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2603
2604 #define ppc64_tlsld_got(bfd) \
2605 (&ppc64_elf_tdata (bfd)->tlsld_got)
2606
2607 #define is_ppc64_elf(bfd) \
2608 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2609 && elf_object_id (bfd) == PPC64_ELF_DATA)
2610
2611 /* Override the generic function because we store some extras. */
2612
2613 static bfd_boolean
2614 ppc64_elf_mkobject (bfd *abfd)
2615 {
2616 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2617 PPC64_ELF_DATA);
2618 }
2619
2620 /* Fix bad default arch selected for a 64 bit input bfd when the
2621 default is 32 bit. */
2622
2623 static bfd_boolean
2624 ppc64_elf_object_p (bfd *abfd)
2625 {
2626 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2627 {
2628 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2629
2630 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2631 {
2632 /* Relies on arch after 32 bit default being 64 bit default. */
2633 abfd->arch_info = abfd->arch_info->next;
2634 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2635 }
2636 }
2637 return TRUE;
2638 }
2639
2640 /* Support for core dump NOTE sections. */
2641
2642 static bfd_boolean
2643 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2644 {
2645 size_t offset, size;
2646
2647 if (note->descsz != 504)
2648 return FALSE;
2649
2650 /* pr_cursig */
2651 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2652
2653 /* pr_pid */
2654 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2655
2656 /* pr_reg */
2657 offset = 112;
2658 size = 384;
2659
2660 /* Make a ".reg/999" section. */
2661 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2662 size, note->descpos + offset);
2663 }
2664
2665 static bfd_boolean
2666 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2667 {
2668 if (note->descsz != 136)
2669 return FALSE;
2670
2671 elf_tdata (abfd)->core_program
2672 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2673 elf_tdata (abfd)->core_command
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2675
2676 return TRUE;
2677 }
2678
2679 static char *
2680 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2681 ...)
2682 {
2683 switch (note_type)
2684 {
2685 default:
2686 return NULL;
2687
2688 case NT_PRPSINFO:
2689 {
2690 char data[136];
2691 va_list ap;
2692
2693 va_start (ap, note_type);
2694 memset (data, 0, 40);
2695 strncpy (data + 40, va_arg (ap, const char *), 16);
2696 strncpy (data + 56, va_arg (ap, const char *), 80);
2697 va_end (ap);
2698 return elfcore_write_note (abfd, buf, bufsiz,
2699 "CORE", note_type, data, sizeof (data));
2700 }
2701
2702 case NT_PRSTATUS:
2703 {
2704 char data[504];
2705 va_list ap;
2706 long pid;
2707 int cursig;
2708 const void *greg;
2709
2710 va_start (ap, note_type);
2711 memset (data, 0, 112);
2712 pid = va_arg (ap, long);
2713 bfd_put_32 (abfd, pid, data + 32);
2714 cursig = va_arg (ap, int);
2715 bfd_put_16 (abfd, cursig, data + 12);
2716 greg = va_arg (ap, const void *);
2717 memcpy (data + 112, greg, 384);
2718 memset (data + 496, 0, 8);
2719 va_end (ap);
2720 return elfcore_write_note (abfd, buf, bufsiz,
2721 "CORE", note_type, data, sizeof (data));
2722 }
2723 }
2724 }
2725
2726 /* Merge backend specific data from an object file to the output
2727 object file when linking. */
2728
2729 static bfd_boolean
2730 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2731 {
2732 /* Check if we have the same endianess. */
2733 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2734 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2735 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2736 {
2737 const char *msg;
2738
2739 if (bfd_big_endian (ibfd))
2740 msg = _("%B: compiled for a big endian system "
2741 "and target is little endian");
2742 else
2743 msg = _("%B: compiled for a little endian system "
2744 "and target is big endian");
2745
2746 (*_bfd_error_handler) (msg, ibfd);
2747
2748 bfd_set_error (bfd_error_wrong_format);
2749 return FALSE;
2750 }
2751
2752 return TRUE;
2753 }
2754
2755 /* Add extra PPC sections. */
2756
2757 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2758 {
2759 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2760 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2761 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2765 { NULL, 0, 0, 0, 0 }
2766 };
2767
2768 enum _ppc64_sec_type {
2769 sec_normal = 0,
2770 sec_opd = 1,
2771 sec_toc = 2
2772 };
2773
2774 struct _ppc64_elf_section_data
2775 {
2776 struct bfd_elf_section_data elf;
2777
2778 union
2779 {
2780 /* An array with one entry for each opd function descriptor. */
2781 struct _opd_sec_data
2782 {
2783 /* Points to the function code section for local opd entries. */
2784 asection **func_sec;
2785
2786 /* After editing .opd, adjust references to opd local syms. */
2787 long *adjust;
2788 } opd;
2789
2790 /* An array for toc sections, indexed by offset/8. */
2791 struct _toc_sec_data
2792 {
2793 /* Specifies the relocation symbol index used at a given toc offset. */
2794 unsigned *symndx;
2795
2796 /* And the relocation addend. */
2797 bfd_vma *add;
2798 } toc;
2799 } u;
2800
2801 enum _ppc64_sec_type sec_type:2;
2802
2803 /* Flag set when small branches are detected. Used to
2804 select suitable defaults for the stub group size. */
2805 unsigned int has_14bit_branch:1;
2806 };
2807
2808 #define ppc64_elf_section_data(sec) \
2809 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2810
2811 static bfd_boolean
2812 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2813 {
2814 if (!sec->used_by_bfd)
2815 {
2816 struct _ppc64_elf_section_data *sdata;
2817 bfd_size_type amt = sizeof (*sdata);
2818
2819 sdata = bfd_zalloc (abfd, amt);
2820 if (sdata == NULL)
2821 return FALSE;
2822 sec->used_by_bfd = sdata;
2823 }
2824
2825 return _bfd_elf_new_section_hook (abfd, sec);
2826 }
2827
2828 static struct _opd_sec_data *
2829 get_opd_info (asection * sec)
2830 {
2831 if (sec != NULL
2832 && ppc64_elf_section_data (sec) != NULL
2833 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2834 return &ppc64_elf_section_data (sec)->u.opd;
2835 return NULL;
2836 }
2837 \f
2838 /* Parameters for the qsort hook. */
2839 static bfd_boolean synthetic_relocatable;
2840
2841 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2842
2843 static int
2844 compare_symbols (const void *ap, const void *bp)
2845 {
2846 const asymbol *a = * (const asymbol **) ap;
2847 const asymbol *b = * (const asymbol **) bp;
2848
2849 /* Section symbols first. */
2850 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2851 return -1;
2852 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2853 return 1;
2854
2855 /* then .opd symbols. */
2856 if (strcmp (a->section->name, ".opd") == 0
2857 && strcmp (b->section->name, ".opd") != 0)
2858 return -1;
2859 if (strcmp (a->section->name, ".opd") != 0
2860 && strcmp (b->section->name, ".opd") == 0)
2861 return 1;
2862
2863 /* then other code symbols. */
2864 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2865 == (SEC_CODE | SEC_ALLOC)
2866 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC))
2868 return -1;
2869
2870 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2871 != (SEC_CODE | SEC_ALLOC)
2872 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 == (SEC_CODE | SEC_ALLOC))
2874 return 1;
2875
2876 if (synthetic_relocatable)
2877 {
2878 if (a->section->id < b->section->id)
2879 return -1;
2880
2881 if (a->section->id > b->section->id)
2882 return 1;
2883 }
2884
2885 if (a->value + a->section->vma < b->value + b->section->vma)
2886 return -1;
2887
2888 if (a->value + a->section->vma > b->value + b->section->vma)
2889 return 1;
2890
2891 /* For syms with the same value, prefer strong dynamic global function
2892 syms over other syms. */
2893 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2894 return -1;
2895
2896 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2897 return 1;
2898
2899 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2900 return -1;
2901
2902 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2903 return 1;
2904
2905 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2906 return -1;
2907
2908 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2909 return 1;
2910
2911 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2912 return -1;
2913
2914 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2915 return 1;
2916
2917 return 0;
2918 }
2919
2920 /* Search SYMS for a symbol of the given VALUE. */
2921
2922 static asymbol *
2923 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2924 {
2925 long mid;
2926
2927 if (id == -1)
2928 {
2929 while (lo < hi)
2930 {
2931 mid = (lo + hi) >> 1;
2932 if (syms[mid]->value + syms[mid]->section->vma < value)
2933 lo = mid + 1;
2934 else if (syms[mid]->value + syms[mid]->section->vma > value)
2935 hi = mid;
2936 else
2937 return syms[mid];
2938 }
2939 }
2940 else
2941 {
2942 while (lo < hi)
2943 {
2944 mid = (lo + hi) >> 1;
2945 if (syms[mid]->section->id < id)
2946 lo = mid + 1;
2947 else if (syms[mid]->section->id > id)
2948 hi = mid;
2949 else if (syms[mid]->value < value)
2950 lo = mid + 1;
2951 else if (syms[mid]->value > value)
2952 hi = mid;
2953 else
2954 return syms[mid];
2955 }
2956 }
2957 return NULL;
2958 }
2959
2960 static bfd_boolean
2961 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2962 {
2963 bfd_vma vma = *(bfd_vma *) ptr;
2964 return ((section->flags & SEC_ALLOC) != 0
2965 && section->vma <= vma
2966 && vma < section->vma + section->size);
2967 }
2968
2969 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2970 entry syms. Also generate @plt symbols for the glink branch table. */
2971
2972 static long
2973 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2974 long static_count, asymbol **static_syms,
2975 long dyn_count, asymbol **dyn_syms,
2976 asymbol **ret)
2977 {
2978 asymbol *s;
2979 long i;
2980 long count;
2981 char *names;
2982 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2983 asection *opd;
2984 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2985 asymbol **syms;
2986
2987 *ret = NULL;
2988
2989 opd = bfd_get_section_by_name (abfd, ".opd");
2990 if (opd == NULL)
2991 return 0;
2992
2993 symcount = static_count;
2994 if (!relocatable)
2995 symcount += dyn_count;
2996 if (symcount == 0)
2997 return 0;
2998
2999 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3000 if (syms == NULL)
3001 return -1;
3002
3003 if (!relocatable && static_count != 0 && dyn_count != 0)
3004 {
3005 /* Use both symbol tables. */
3006 memcpy (syms, static_syms, static_count * sizeof (*syms));
3007 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3008 }
3009 else if (!relocatable && static_count == 0)
3010 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3011 else
3012 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3013
3014 synthetic_relocatable = relocatable;
3015 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3016
3017 if (!relocatable && symcount > 1)
3018 {
3019 long j;
3020 /* Trim duplicate syms, since we may have merged the normal and
3021 dynamic symbols. Actually, we only care about syms that have
3022 different values, so trim any with the same value. */
3023 for (i = 1, j = 1; i < symcount; ++i)
3024 if (syms[i - 1]->value + syms[i - 1]->section->vma
3025 != syms[i]->value + syms[i]->section->vma)
3026 syms[j++] = syms[i];
3027 symcount = j;
3028 }
3029
3030 i = 0;
3031 if (strcmp (syms[i]->section->name, ".opd") == 0)
3032 ++i;
3033 codesecsym = i;
3034
3035 for (; i < symcount; ++i)
3036 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3037 != (SEC_CODE | SEC_ALLOC))
3038 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3039 break;
3040 codesecsymend = i;
3041
3042 for (; i < symcount; ++i)
3043 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 break;
3045 secsymend = i;
3046
3047 for (; i < symcount; ++i)
3048 if (strcmp (syms[i]->section->name, ".opd") != 0)
3049 break;
3050 opdsymend = i;
3051
3052 for (; i < symcount; ++i)
3053 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3054 != (SEC_CODE | SEC_ALLOC))
3055 break;
3056 symcount = i;
3057
3058 count = 0;
3059
3060 if (relocatable)
3061 {
3062 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3063 arelent *r;
3064 size_t size;
3065 long relcount;
3066
3067 if (opdsymend == secsymend)
3068 goto done;
3069
3070 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3071 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3072 if (relcount == 0)
3073 goto done;
3074
3075 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3076 {
3077 count = -1;
3078 goto done;
3079 }
3080
3081 size = 0;
3082 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3083 {
3084 asymbol *sym;
3085
3086 while (r < opd->relocation + relcount
3087 && r->address < syms[i]->value + opd->vma)
3088 ++r;
3089
3090 if (r == opd->relocation + relcount)
3091 break;
3092
3093 if (r->address != syms[i]->value + opd->vma)
3094 continue;
3095
3096 if (r->howto->type != R_PPC64_ADDR64)
3097 continue;
3098
3099 sym = *r->sym_ptr_ptr;
3100 if (!sym_exists_at (syms, opdsymend, symcount,
3101 sym->section->id, sym->value + r->addend))
3102 {
3103 ++count;
3104 size += sizeof (asymbol);
3105 size += strlen (syms[i]->name) + 2;
3106 }
3107 }
3108
3109 s = *ret = bfd_malloc (size);
3110 if (s == NULL)
3111 {
3112 count = -1;
3113 goto done;
3114 }
3115
3116 names = (char *) (s + count);
3117
3118 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3119 {
3120 asymbol *sym;
3121
3122 while (r < opd->relocation + relcount
3123 && r->address < syms[i]->value + opd->vma)
3124 ++r;
3125
3126 if (r == opd->relocation + relcount)
3127 break;
3128
3129 if (r->address != syms[i]->value + opd->vma)
3130 continue;
3131
3132 if (r->howto->type != R_PPC64_ADDR64)
3133 continue;
3134
3135 sym = *r->sym_ptr_ptr;
3136 if (!sym_exists_at (syms, opdsymend, symcount,
3137 sym->section->id, sym->value + r->addend))
3138 {
3139 size_t len;
3140
3141 *s = *syms[i];
3142 s->flags |= BSF_SYNTHETIC;
3143 s->section = sym->section;
3144 s->value = sym->value + r->addend;
3145 s->name = names;
3146 *names++ = '.';
3147 len = strlen (syms[i]->name);
3148 memcpy (names, syms[i]->name, len + 1);
3149 names += len + 1;
3150 /* Have udata.p point back to the original symbol this
3151 synthetic symbol was derived from. */
3152 s->udata.p = syms[i];
3153 s++;
3154 }
3155 }
3156 }
3157 else
3158 {
3159 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3160 bfd_byte *contents;
3161 size_t size;
3162 long plt_count = 0;
3163 bfd_vma glink_vma = 0, resolv_vma = 0;
3164 asection *dynamic, *glink = NULL, *relplt = NULL;
3165 arelent *p;
3166
3167 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3168 {
3169 if (contents)
3170 {
3171 free_contents_and_exit:
3172 free (contents);
3173 }
3174 count = -1;
3175 goto done;
3176 }
3177
3178 size = 0;
3179 for (i = secsymend; i < opdsymend; ++i)
3180 {
3181 bfd_vma ent;
3182
3183 /* Ignore bogus symbols. */
3184 if (syms[i]->value > opd->size - 8)
3185 continue;
3186
3187 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3188 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3189 {
3190 ++count;
3191 size += sizeof (asymbol);
3192 size += strlen (syms[i]->name) + 2;
3193 }
3194 }
3195
3196 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3197 if (dyn_count != 0
3198 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3199 {
3200 bfd_byte *dynbuf, *extdyn, *extdynend;
3201 size_t extdynsize;
3202 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3203
3204 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3205 goto free_contents_and_exit;
3206
3207 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3208 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3209
3210 extdyn = dynbuf;
3211 extdynend = extdyn + dynamic->size;
3212 for (; extdyn < extdynend; extdyn += extdynsize)
3213 {
3214 Elf_Internal_Dyn dyn;
3215 (*swap_dyn_in) (abfd, extdyn, &dyn);
3216
3217 if (dyn.d_tag == DT_NULL)
3218 break;
3219
3220 if (dyn.d_tag == DT_PPC64_GLINK)
3221 {
3222 /* The first glink stub starts at offset 32; see comment in
3223 ppc64_elf_finish_dynamic_sections. */
3224 glink_vma = dyn.d_un.d_val + 32;
3225 /* The .glink section usually does not survive the final
3226 link; search for the section (usually .text) where the
3227 glink stubs now reside. */
3228 glink = bfd_sections_find_if (abfd, section_covers_vma,
3229 &glink_vma);
3230 break;
3231 }
3232 }
3233
3234 free (dynbuf);
3235 }
3236
3237 if (glink != NULL)
3238 {
3239 /* Determine __glink trampoline by reading the relative branch
3240 from the first glink stub. */
3241 bfd_byte buf[4];
3242 if (bfd_get_section_contents (abfd, glink, buf,
3243 glink_vma + 4 - glink->vma, 4))
3244 {
3245 unsigned int insn = bfd_get_32 (abfd, buf);
3246 insn ^= B_DOT;
3247 if ((insn & ~0x3fffffc) == 0)
3248 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3249 }
3250
3251 if (resolv_vma)
3252 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3253
3254 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3255 if (relplt != NULL)
3256 {
3257 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3258 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3259 goto free_contents_and_exit;
3260
3261 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3262 size += plt_count * sizeof (asymbol);
3263
3264 p = relplt->relocation;
3265 for (i = 0; i < plt_count; i++, p++)
3266 {
3267 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3268 if (p->addend != 0)
3269 size += sizeof ("+0x") - 1 + 16;
3270 }
3271 }
3272 }
3273
3274 s = *ret = bfd_malloc (size);
3275 if (s == NULL)
3276 goto free_contents_and_exit;
3277
3278 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3279
3280 for (i = secsymend; i < opdsymend; ++i)
3281 {
3282 bfd_vma ent;
3283
3284 if (syms[i]->value > opd->size - 8)
3285 continue;
3286
3287 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3288 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3289 {
3290 long lo, hi;
3291 size_t len;
3292 asection *sec = abfd->sections;
3293
3294 *s = *syms[i];
3295 lo = codesecsym;
3296 hi = codesecsymend;
3297 while (lo < hi)
3298 {
3299 long mid = (lo + hi) >> 1;
3300 if (syms[mid]->section->vma < ent)
3301 lo = mid + 1;
3302 else if (syms[mid]->section->vma > ent)
3303 hi = mid;
3304 else
3305 {
3306 sec = syms[mid]->section;
3307 break;
3308 }
3309 }
3310
3311 if (lo >= hi && lo > codesecsym)
3312 sec = syms[lo - 1]->section;
3313
3314 for (; sec != NULL; sec = sec->next)
3315 {
3316 if (sec->vma > ent)
3317 break;
3318 if ((sec->flags & SEC_ALLOC) == 0
3319 || (sec->flags & SEC_LOAD) == 0)
3320 break;
3321 if ((sec->flags & SEC_CODE) != 0)
3322 s->section = sec;
3323 }
3324 s->flags |= BSF_SYNTHETIC;
3325 s->value = ent - s->section->vma;
3326 s->name = names;
3327 *names++ = '.';
3328 len = strlen (syms[i]->name);
3329 memcpy (names, syms[i]->name, len + 1);
3330 names += len + 1;
3331 /* Have udata.p point back to the original symbol this
3332 synthetic symbol was derived from. */
3333 s->udata.p = syms[i];
3334 s++;
3335 }
3336 }
3337 free (contents);
3338
3339 if (glink != NULL && relplt != NULL)
3340 {
3341 if (resolv_vma)
3342 {
3343 /* Add a symbol for the main glink trampoline. */
3344 memset (s, 0, sizeof *s);
3345 s->the_bfd = abfd;
3346 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3347 s->section = glink;
3348 s->value = resolv_vma - glink->vma;
3349 s->name = names;
3350 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3351 names += sizeof ("__glink_PLTresolve");
3352 s++;
3353 count++;
3354 }
3355
3356 /* FIXME: It would be very much nicer to put sym@plt on the
3357 stub rather than on the glink branch table entry. The
3358 objdump disassembler would then use a sensible symbol
3359 name on plt calls. The difficulty in doing so is
3360 a) finding the stubs, and,
3361 b) matching stubs against plt entries, and,
3362 c) there can be multiple stubs for a given plt entry.
3363
3364 Solving (a) could be done by code scanning, but older
3365 ppc64 binaries used different stubs to current code.
3366 (b) is the tricky one since you need to known the toc
3367 pointer for at least one function that uses a pic stub to
3368 be able to calculate the plt address referenced.
3369 (c) means gdb would need to set multiple breakpoints (or
3370 find the glink branch itself) when setting breakpoints
3371 for pending shared library loads. */
3372 p = relplt->relocation;
3373 for (i = 0; i < plt_count; i++, p++)
3374 {
3375 size_t len;
3376
3377 *s = **p->sym_ptr_ptr;
3378 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3379 we are defining a symbol, ensure one of them is set. */
3380 if ((s->flags & BSF_LOCAL) == 0)
3381 s->flags |= BSF_GLOBAL;
3382 s->flags |= BSF_SYNTHETIC;
3383 s->section = glink;
3384 s->value = glink_vma - glink->vma;
3385 s->name = names;
3386 s->udata.p = NULL;
3387 len = strlen ((*p->sym_ptr_ptr)->name);
3388 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3389 names += len;
3390 if (p->addend != 0)
3391 {
3392 memcpy (names, "+0x", sizeof ("+0x") - 1);
3393 names += sizeof ("+0x") - 1;
3394 bfd_sprintf_vma (abfd, names, p->addend);
3395 names += strlen (names);
3396 }
3397 memcpy (names, "@plt", sizeof ("@plt"));
3398 names += sizeof ("@plt");
3399 s++;
3400 glink_vma += 8;
3401 if (i >= 0x8000)
3402 glink_vma += 4;
3403 }
3404 count += plt_count;
3405 }
3406 }
3407
3408 done:
3409 free (syms);
3410 return count;
3411 }
3412 \f
3413 /* The following functions are specific to the ELF linker, while
3414 functions above are used generally. Those named ppc64_elf_* are
3415 called by the main ELF linker code. They appear in this file more
3416 or less in the order in which they are called. eg.
3417 ppc64_elf_check_relocs is called early in the link process,
3418 ppc64_elf_finish_dynamic_sections is one of the last functions
3419 called.
3420
3421 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3422 functions have both a function code symbol and a function descriptor
3423 symbol. A call to foo in a relocatable object file looks like:
3424
3425 . .text
3426 . x:
3427 . bl .foo
3428 . nop
3429
3430 The function definition in another object file might be:
3431
3432 . .section .opd
3433 . foo: .quad .foo
3434 . .quad .TOC.@tocbase
3435 . .quad 0
3436 .
3437 . .text
3438 . .foo: blr
3439
3440 When the linker resolves the call during a static link, the branch
3441 unsurprisingly just goes to .foo and the .opd information is unused.
3442 If the function definition is in a shared library, things are a little
3443 different: The call goes via a plt call stub, the opd information gets
3444 copied to the plt, and the linker patches the nop.
3445
3446 . x:
3447 . bl .foo_stub
3448 . ld 2,40(1)
3449 .
3450 .
3451 . .foo_stub:
3452 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3453 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3454 . std 2,40(1) # this is the general idea
3455 . ld 11,0(12)
3456 . ld 2,8(12)
3457 . mtctr 11
3458 . ld 11,16(12)
3459 . bctr
3460 .
3461 . .section .plt
3462 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3463
3464 The "reloc ()" notation is supposed to indicate that the linker emits
3465 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3466 copying.
3467
3468 What are the difficulties here? Well, firstly, the relocations
3469 examined by the linker in check_relocs are against the function code
3470 sym .foo, while the dynamic relocation in the plt is emitted against
3471 the function descriptor symbol, foo. Somewhere along the line, we need
3472 to carefully copy dynamic link information from one symbol to the other.
3473 Secondly, the generic part of the elf linker will make .foo a dynamic
3474 symbol as is normal for most other backends. We need foo dynamic
3475 instead, at least for an application final link. However, when
3476 creating a shared library containing foo, we need to have both symbols
3477 dynamic so that references to .foo are satisfied during the early
3478 stages of linking. Otherwise the linker might decide to pull in a
3479 definition from some other object, eg. a static library.
3480
3481 Update: As of August 2004, we support a new convention. Function
3482 calls may use the function descriptor symbol, ie. "bl foo". This
3483 behaves exactly as "bl .foo". */
3484
3485 /* The linker needs to keep track of the number of relocs that it
3486 decides to copy as dynamic relocs in check_relocs for each symbol.
3487 This is so that it can later discard them if they are found to be
3488 unnecessary. We store the information in a field extending the
3489 regular ELF linker hash table. */
3490
3491 struct ppc_dyn_relocs
3492 {
3493 struct ppc_dyn_relocs *next;
3494
3495 /* The input section of the reloc. */
3496 asection *sec;
3497
3498 /* Total number of relocs copied for the input section. */
3499 bfd_size_type count;
3500
3501 /* Number of pc-relative relocs copied for the input section. */
3502 bfd_size_type pc_count;
3503 };
3504
3505 /* Of those relocs that might be copied as dynamic relocs, this function
3506 selects those that must be copied when linking a shared library,
3507 even when the symbol is local. */
3508
3509 static int
3510 must_be_dyn_reloc (struct bfd_link_info *info,
3511 enum elf_ppc64_reloc_type r_type)
3512 {
3513 switch (r_type)
3514 {
3515 default:
3516 return 1;
3517
3518 case R_PPC64_REL32:
3519 case R_PPC64_REL64:
3520 case R_PPC64_REL30:
3521 return 0;
3522
3523 case R_PPC64_TPREL16:
3524 case R_PPC64_TPREL16_LO:
3525 case R_PPC64_TPREL16_HI:
3526 case R_PPC64_TPREL16_HA:
3527 case R_PPC64_TPREL16_DS:
3528 case R_PPC64_TPREL16_LO_DS:
3529 case R_PPC64_TPREL16_HIGHER:
3530 case R_PPC64_TPREL16_HIGHERA:
3531 case R_PPC64_TPREL16_HIGHEST:
3532 case R_PPC64_TPREL16_HIGHESTA:
3533 case R_PPC64_TPREL64:
3534 return !info->executable;
3535 }
3536 }
3537
3538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3539 copying dynamic variables from a shared lib into an app's dynbss
3540 section, and instead use a dynamic relocation to point into the
3541 shared lib. With code that gcc generates, it's vital that this be
3542 enabled; In the PowerPC64 ABI, the address of a function is actually
3543 the address of a function descriptor, which resides in the .opd
3544 section. gcc uses the descriptor directly rather than going via the
3545 GOT as some other ABI's do, which means that initialized function
3546 pointers must reference the descriptor. Thus, a function pointer
3547 initialized to the address of a function in a shared library will
3548 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3549 redefines the function descriptor symbol to point to the copy. This
3550 presents a problem as a plt entry for that function is also
3551 initialized from the function descriptor symbol and the copy reloc
3552 may not be initialized first. */
3553 #define ELIMINATE_COPY_RELOCS 1
3554
3555 /* Section name for stubs is the associated section name plus this
3556 string. */
3557 #define STUB_SUFFIX ".stub"
3558
3559 /* Linker stubs.
3560 ppc_stub_long_branch:
3561 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3562 destination, but a 24 bit branch in a stub section will reach.
3563 . b dest
3564
3565 ppc_stub_plt_branch:
3566 Similar to the above, but a 24 bit branch in the stub section won't
3567 reach its destination.
3568 . addis %r12,%r2,xxx@toc@ha
3569 . ld %r11,xxx@toc@l(%r12)
3570 . mtctr %r11
3571 . bctr
3572
3573 ppc_stub_plt_call:
3574 Used to call a function in a shared library. If it so happens that
3575 the plt entry referenced crosses a 64k boundary, then an extra
3576 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3577 . addis %r12,%r2,xxx@toc@ha
3578 . std %r2,40(%r1)
3579 . ld %r11,xxx+0@toc@l(%r12)
3580 . mtctr %r11
3581 . ld %r2,xxx+8@toc@l(%r12)
3582 . ld %r11,xxx+16@toc@l(%r12)
3583 . bctr
3584
3585 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3586 code to adjust the value and save r2 to support multiple toc sections.
3587 A ppc_stub_long_branch with an r2 offset looks like:
3588 . std %r2,40(%r1)
3589 . addis %r2,%r2,off@ha
3590 . addi %r2,%r2,off@l
3591 . b dest
3592
3593 A ppc_stub_plt_branch with an r2 offset looks like:
3594 . std %r2,40(%r1)
3595 . addis %r12,%r2,xxx@toc@ha
3596 . ld %r11,xxx@toc@l(%r12)
3597 . addis %r2,%r2,off@ha
3598 . addi %r2,%r2,off@l
3599 . mtctr %r11
3600 . bctr
3601
3602 In cases where the "addis" instruction would add zero, the "addis" is
3603 omitted and following instructions modified slightly in some cases.
3604 */
3605
3606 enum ppc_stub_type {
3607 ppc_stub_none,
3608 ppc_stub_long_branch,
3609 ppc_stub_long_branch_r2off,
3610 ppc_stub_plt_branch,
3611 ppc_stub_plt_branch_r2off,
3612 ppc_stub_plt_call
3613 };
3614
3615 struct ppc_stub_hash_entry {
3616
3617 /* Base hash table entry structure. */
3618 struct bfd_hash_entry root;
3619
3620 enum ppc_stub_type stub_type;
3621
3622 /* The stub section. */
3623 asection *stub_sec;
3624
3625 /* Offset within stub_sec of the beginning of this stub. */
3626 bfd_vma stub_offset;
3627
3628 /* Given the symbol's value and its section we can determine its final
3629 value when building the stubs (so the stub knows where to jump. */
3630 bfd_vma target_value;
3631 asection *target_section;
3632
3633 /* The symbol table entry, if any, that this was derived from. */
3634 struct ppc_link_hash_entry *h;
3635 struct plt_entry *plt_ent;
3636
3637 /* And the reloc addend that this was derived from. */
3638 bfd_vma addend;
3639
3640 /* Where this stub is being called from, or, in the case of combined
3641 stub sections, the first input section in the group. */
3642 asection *id_sec;
3643 };
3644
3645 struct ppc_branch_hash_entry {
3646
3647 /* Base hash table entry structure. */
3648 struct bfd_hash_entry root;
3649
3650 /* Offset within branch lookup table. */
3651 unsigned int offset;
3652
3653 /* Generation marker. */
3654 unsigned int iter;
3655 };
3656
3657 struct ppc_link_hash_entry
3658 {
3659 struct elf_link_hash_entry elf;
3660
3661 union {
3662 /* A pointer to the most recently used stub hash entry against this
3663 symbol. */
3664 struct ppc_stub_hash_entry *stub_cache;
3665
3666 /* A pointer to the next symbol starting with a '.' */
3667 struct ppc_link_hash_entry *next_dot_sym;
3668 } u;
3669
3670 /* Track dynamic relocs copied for this symbol. */
3671 struct ppc_dyn_relocs *dyn_relocs;
3672
3673 /* Link between function code and descriptor symbols. */
3674 struct ppc_link_hash_entry *oh;
3675
3676 /* Flag function code and descriptor symbols. */
3677 unsigned int is_func:1;
3678 unsigned int is_func_descriptor:1;
3679 unsigned int fake:1;
3680
3681 /* Whether global opd/toc sym has been adjusted or not.
3682 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3683 should be set for all globals defined in any opd/toc section. */
3684 unsigned int adjust_done:1;
3685
3686 /* Set if we twiddled this symbol to weak at some stage. */
3687 unsigned int was_undefined:1;
3688
3689 /* Contexts in which symbol is used in the GOT (or TOC).
3690 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3691 corresponding relocs are encountered during check_relocs.
3692 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3693 indicate the corresponding GOT entry type is not needed.
3694 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3695 a TPREL one. We use a separate flag rather than setting TPREL
3696 just for convenience in distinguishing the two cases. */
3697 #define TLS_GD 1 /* GD reloc. */
3698 #define TLS_LD 2 /* LD reloc. */
3699 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3700 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3701 #define TLS_TLS 16 /* Any TLS reloc. */
3702 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3703 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3704 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3705 unsigned char tls_mask;
3706 };
3707
3708 /* ppc64 ELF linker hash table. */
3709
3710 struct ppc_link_hash_table
3711 {
3712 struct elf_link_hash_table elf;
3713
3714 /* The stub hash table. */
3715 struct bfd_hash_table stub_hash_table;
3716
3717 /* Another hash table for plt_branch stubs. */
3718 struct bfd_hash_table branch_hash_table;
3719
3720 /* Linker stub bfd. */
3721 bfd *stub_bfd;
3722
3723 /* Linker call-backs. */
3724 asection * (*add_stub_section) (const char *, asection *);
3725 void (*layout_sections_again) (void);
3726
3727 /* Array to keep track of which stub sections have been created, and
3728 information on stub grouping. */
3729 struct map_stub {
3730 /* This is the section to which stubs in the group will be attached. */
3731 asection *link_sec;
3732 /* The stub section. */
3733 asection *stub_sec;
3734 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3735 bfd_vma toc_off;
3736 } *stub_group;
3737
3738 /* Temp used when calculating TOC pointers. */
3739 bfd_vma toc_curr;
3740 bfd *toc_bfd;
3741 asection *toc_first_sec;
3742
3743 /* Highest input section id. */
3744 int top_id;
3745
3746 /* Highest output section index. */
3747 int top_index;
3748
3749 /* Used when adding symbols. */
3750 struct ppc_link_hash_entry *dot_syms;
3751
3752 /* List of input sections for each output section. */
3753 asection **input_list;
3754
3755 /* Short-cuts to get to dynamic linker sections. */
3756 asection *got;
3757 asection *plt;
3758 asection *relplt;
3759 asection *iplt;
3760 asection *reliplt;
3761 asection *dynbss;
3762 asection *relbss;
3763 asection *glink;
3764 asection *sfpr;
3765 asection *brlt;
3766 asection *relbrlt;
3767
3768 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3769 struct ppc_link_hash_entry *tls_get_addr;
3770 struct ppc_link_hash_entry *tls_get_addr_fd;
3771
3772 /* The size of reliplt used by got entry relocs. */
3773 bfd_size_type got_reli_size;
3774
3775 /* Statistics. */
3776 unsigned long stub_count[ppc_stub_plt_call];
3777
3778 /* Number of stubs against global syms. */
3779 unsigned long stub_globals;
3780
3781 /* Set if we should emit symbols for stubs. */
3782 unsigned int emit_stub_syms:1;
3783
3784 /* Set if __tls_get_addr optimization should not be done. */
3785 unsigned int no_tls_get_addr_opt:1;
3786
3787 /* Support for multiple toc sections. */
3788 unsigned int do_multi_toc:1;
3789 unsigned int multi_toc_needed:1;
3790 unsigned int second_toc_pass:1;
3791
3792 /* Set on error. */
3793 unsigned int stub_error:1;
3794
3795 /* Temp used by ppc64_elf_process_dot_syms. */
3796 unsigned int twiddled_syms:1;
3797
3798 /* Incremented every time we size stubs. */
3799 unsigned int stub_iteration;
3800
3801 /* Small local sym cache. */
3802 struct sym_cache sym_cache;
3803 };
3804
3805 /* Rename some of the generic section flags to better document how they
3806 are used here. */
3807
3808 /* Nonzero if this section has TLS related relocations. */
3809 #define has_tls_reloc sec_flg0
3810
3811 /* Nonzero if this section has a call to __tls_get_addr. */
3812 #define has_tls_get_addr_call sec_flg1
3813
3814 /* Nonzero if this section has any toc or got relocs. */
3815 #define has_toc_reloc sec_flg2
3816
3817 /* Nonzero if this section has a call to another section that uses
3818 the toc or got. */
3819 #define makes_toc_func_call sec_flg3
3820
3821 /* Recursion protection when determining above flag. */
3822 #define call_check_in_progress sec_flg4
3823
3824 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3825
3826 #define ppc_hash_table(p) \
3827 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3828 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3829
3830 #define ppc_stub_hash_lookup(table, string, create, copy) \
3831 ((struct ppc_stub_hash_entry *) \
3832 bfd_hash_lookup ((table), (string), (create), (copy)))
3833
3834 #define ppc_branch_hash_lookup(table, string, create, copy) \
3835 ((struct ppc_branch_hash_entry *) \
3836 bfd_hash_lookup ((table), (string), (create), (copy)))
3837
3838 /* Create an entry in the stub hash table. */
3839
3840 static struct bfd_hash_entry *
3841 stub_hash_newfunc (struct bfd_hash_entry *entry,
3842 struct bfd_hash_table *table,
3843 const char *string)
3844 {
3845 /* Allocate the structure if it has not already been allocated by a
3846 subclass. */
3847 if (entry == NULL)
3848 {
3849 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3850 if (entry == NULL)
3851 return entry;
3852 }
3853
3854 /* Call the allocation method of the superclass. */
3855 entry = bfd_hash_newfunc (entry, table, string);
3856 if (entry != NULL)
3857 {
3858 struct ppc_stub_hash_entry *eh;
3859
3860 /* Initialize the local fields. */
3861 eh = (struct ppc_stub_hash_entry *) entry;
3862 eh->stub_type = ppc_stub_none;
3863 eh->stub_sec = NULL;
3864 eh->stub_offset = 0;
3865 eh->target_value = 0;
3866 eh->target_section = NULL;
3867 eh->h = NULL;
3868 eh->id_sec = NULL;
3869 }
3870
3871 return entry;
3872 }
3873
3874 /* Create an entry in the branch hash table. */
3875
3876 static struct bfd_hash_entry *
3877 branch_hash_newfunc (struct bfd_hash_entry *entry,
3878 struct bfd_hash_table *table,
3879 const char *string)
3880 {
3881 /* Allocate the structure if it has not already been allocated by a
3882 subclass. */
3883 if (entry == NULL)
3884 {
3885 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3886 if (entry == NULL)
3887 return entry;
3888 }
3889
3890 /* Call the allocation method of the superclass. */
3891 entry = bfd_hash_newfunc (entry, table, string);
3892 if (entry != NULL)
3893 {
3894 struct ppc_branch_hash_entry *eh;
3895
3896 /* Initialize the local fields. */
3897 eh = (struct ppc_branch_hash_entry *) entry;
3898 eh->offset = 0;
3899 eh->iter = 0;
3900 }
3901
3902 return entry;
3903 }
3904
3905 /* Create an entry in a ppc64 ELF linker hash table. */
3906
3907 static struct bfd_hash_entry *
3908 link_hash_newfunc (struct bfd_hash_entry *entry,
3909 struct bfd_hash_table *table,
3910 const char *string)
3911 {
3912 /* Allocate the structure if it has not already been allocated by a
3913 subclass. */
3914 if (entry == NULL)
3915 {
3916 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3917 if (entry == NULL)
3918 return entry;
3919 }
3920
3921 /* Call the allocation method of the superclass. */
3922 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3923 if (entry != NULL)
3924 {
3925 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3926
3927 memset (&eh->u.stub_cache, 0,
3928 (sizeof (struct ppc_link_hash_entry)
3929 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3930
3931 /* When making function calls, old ABI code references function entry
3932 points (dot symbols), while new ABI code references the function
3933 descriptor symbol. We need to make any combination of reference and
3934 definition work together, without breaking archive linking.
3935
3936 For a defined function "foo" and an undefined call to "bar":
3937 An old object defines "foo" and ".foo", references ".bar" (possibly
3938 "bar" too).
3939 A new object defines "foo" and references "bar".
3940
3941 A new object thus has no problem with its undefined symbols being
3942 satisfied by definitions in an old object. On the other hand, the
3943 old object won't have ".bar" satisfied by a new object.
3944
3945 Keep a list of newly added dot-symbols. */
3946
3947 if (string[0] == '.')
3948 {
3949 struct ppc_link_hash_table *htab;
3950
3951 htab = (struct ppc_link_hash_table *) table;
3952 eh->u.next_dot_sym = htab->dot_syms;
3953 htab->dot_syms = eh;
3954 }
3955 }
3956
3957 return entry;
3958 }
3959
3960 /* Create a ppc64 ELF linker hash table. */
3961
3962 static struct bfd_link_hash_table *
3963 ppc64_elf_link_hash_table_create (bfd *abfd)
3964 {
3965 struct ppc_link_hash_table *htab;
3966 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3967
3968 htab = bfd_zmalloc (amt);
3969 if (htab == NULL)
3970 return NULL;
3971
3972 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3973 sizeof (struct ppc_link_hash_entry),
3974 PPC64_ELF_DATA))
3975 {
3976 free (htab);
3977 return NULL;
3978 }
3979
3980 /* Init the stub hash table too. */
3981 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3982 sizeof (struct ppc_stub_hash_entry)))
3983 return NULL;
3984
3985 /* And the branch hash table. */
3986 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3987 sizeof (struct ppc_branch_hash_entry)))
3988 return NULL;
3989
3990 /* Initializing two fields of the union is just cosmetic. We really
3991 only care about glist, but when compiled on a 32-bit host the
3992 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3993 debugger inspection of these fields look nicer. */
3994 htab->elf.init_got_refcount.refcount = 0;
3995 htab->elf.init_got_refcount.glist = NULL;
3996 htab->elf.init_plt_refcount.refcount = 0;
3997 htab->elf.init_plt_refcount.glist = NULL;
3998 htab->elf.init_got_offset.offset = 0;
3999 htab->elf.init_got_offset.glist = NULL;
4000 htab->elf.init_plt_offset.offset = 0;
4001 htab->elf.init_plt_offset.glist = NULL;
4002
4003 return &htab->elf.root;
4004 }
4005
4006 /* Free the derived linker hash table. */
4007
4008 static void
4009 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4010 {
4011 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4012
4013 bfd_hash_table_free (&ret->stub_hash_table);
4014 bfd_hash_table_free (&ret->branch_hash_table);
4015 _bfd_generic_link_hash_table_free (hash);
4016 }
4017
4018 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4019
4020 void
4021 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4022 {
4023 struct ppc_link_hash_table *htab;
4024
4025 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4026
4027 /* Always hook our dynamic sections into the first bfd, which is the
4028 linker created stub bfd. This ensures that the GOT header is at
4029 the start of the output TOC section. */
4030 htab = ppc_hash_table (info);
4031 if (htab == NULL)
4032 return;
4033 htab->stub_bfd = abfd;
4034 htab->elf.dynobj = abfd;
4035 }
4036
4037 /* Build a name for an entry in the stub hash table. */
4038
4039 static char *
4040 ppc_stub_name (const asection *input_section,
4041 const asection *sym_sec,
4042 const struct ppc_link_hash_entry *h,
4043 const Elf_Internal_Rela *rel)
4044 {
4045 char *stub_name;
4046 bfd_size_type len;
4047
4048 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4049 offsets from a sym as a branch target? In fact, we could
4050 probably assume the addend is always zero. */
4051 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4052
4053 if (h)
4054 {
4055 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4056 stub_name = bfd_malloc (len);
4057 if (stub_name == NULL)
4058 return stub_name;
4059
4060 sprintf (stub_name, "%08x.%s+%x",
4061 input_section->id & 0xffffffff,
4062 h->elf.root.root.string,
4063 (int) rel->r_addend & 0xffffffff);
4064 }
4065 else
4066 {
4067 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4068 stub_name = bfd_malloc (len);
4069 if (stub_name == NULL)
4070 return stub_name;
4071
4072 sprintf (stub_name, "%08x.%x:%x+%x",
4073 input_section->id & 0xffffffff,
4074 sym_sec->id & 0xffffffff,
4075 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4076 (int) rel->r_addend & 0xffffffff);
4077 }
4078 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4079 stub_name[len - 2] = 0;
4080 return stub_name;
4081 }
4082
4083 /* Look up an entry in the stub hash. Stub entries are cached because
4084 creating the stub name takes a bit of time. */
4085
4086 static struct ppc_stub_hash_entry *
4087 ppc_get_stub_entry (const asection *input_section,
4088 const asection *sym_sec,
4089 struct ppc_link_hash_entry *h,
4090 const Elf_Internal_Rela *rel,
4091 struct ppc_link_hash_table *htab)
4092 {
4093 struct ppc_stub_hash_entry *stub_entry;
4094 const asection *id_sec;
4095
4096 /* If this input section is part of a group of sections sharing one
4097 stub section, then use the id of the first section in the group.
4098 Stub names need to include a section id, as there may well be
4099 more than one stub used to reach say, printf, and we need to
4100 distinguish between them. */
4101 id_sec = htab->stub_group[input_section->id].link_sec;
4102
4103 if (h != NULL && h->u.stub_cache != NULL
4104 && h->u.stub_cache->h == h
4105 && h->u.stub_cache->id_sec == id_sec)
4106 {
4107 stub_entry = h->u.stub_cache;
4108 }
4109 else
4110 {
4111 char *stub_name;
4112
4113 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4114 if (stub_name == NULL)
4115 return NULL;
4116
4117 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4118 stub_name, FALSE, FALSE);
4119 if (h != NULL)
4120 h->u.stub_cache = stub_entry;
4121
4122 free (stub_name);
4123 }
4124
4125 return stub_entry;
4126 }
4127
4128 /* Add a new stub entry to the stub hash. Not all fields of the new
4129 stub entry are initialised. */
4130
4131 static struct ppc_stub_hash_entry *
4132 ppc_add_stub (const char *stub_name,
4133 asection *section,
4134 struct ppc_link_hash_table *htab)
4135 {
4136 asection *link_sec;
4137 asection *stub_sec;
4138 struct ppc_stub_hash_entry *stub_entry;
4139
4140 link_sec = htab->stub_group[section->id].link_sec;
4141 stub_sec = htab->stub_group[section->id].stub_sec;
4142 if (stub_sec == NULL)
4143 {
4144 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4145 if (stub_sec == NULL)
4146 {
4147 size_t namelen;
4148 bfd_size_type len;
4149 char *s_name;
4150
4151 namelen = strlen (link_sec->name);
4152 len = namelen + sizeof (STUB_SUFFIX);
4153 s_name = bfd_alloc (htab->stub_bfd, len);
4154 if (s_name == NULL)
4155 return NULL;
4156
4157 memcpy (s_name, link_sec->name, namelen);
4158 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4159 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4160 if (stub_sec == NULL)
4161 return NULL;
4162 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4163 }
4164 htab->stub_group[section->id].stub_sec = stub_sec;
4165 }
4166
4167 /* Enter this entry into the linker stub hash table. */
4168 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4169 TRUE, FALSE);
4170 if (stub_entry == NULL)
4171 {
4172 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4173 section->owner, stub_name);
4174 return NULL;
4175 }
4176
4177 stub_entry->stub_sec = stub_sec;
4178 stub_entry->stub_offset = 0;
4179 stub_entry->id_sec = link_sec;
4180 return stub_entry;
4181 }
4182
4183 /* Create sections for linker generated code. */
4184
4185 static bfd_boolean
4186 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4187 {
4188 struct ppc_link_hash_table *htab;
4189 flagword flags;
4190
4191 htab = ppc_hash_table (info);
4192 if (htab == NULL)
4193 return FALSE;
4194
4195 /* Create .sfpr for code to save and restore fp regs. */
4196 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4197 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4198 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4199 flags);
4200 if (htab->sfpr == NULL
4201 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4202 return FALSE;
4203
4204 /* Create .glink for lazy dynamic linking support. */
4205 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4206 flags);
4207 if (htab->glink == NULL
4208 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4209 return FALSE;
4210
4211 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4212 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4213 if (htab->iplt == NULL
4214 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4215 return FALSE;
4216
4217 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4218 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4219 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4220 ".rela.iplt",
4221 flags);
4222 if (htab->reliplt == NULL
4223 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4224 return FALSE;
4225
4226 /* Create branch lookup table for plt_branch stubs. */
4227 flags = (SEC_ALLOC | SEC_LOAD
4228 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4229 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4230 flags);
4231 if (htab->brlt == NULL
4232 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4233 return FALSE;
4234
4235 if (!info->shared)
4236 return TRUE;
4237
4238 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4239 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4240 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4241 ".rela.branch_lt",
4242 flags);
4243 if (htab->relbrlt == NULL
4244 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4245 return FALSE;
4246
4247 return TRUE;
4248 }
4249
4250 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4251 not already done. */
4252
4253 static bfd_boolean
4254 create_got_section (bfd *abfd, struct bfd_link_info *info)
4255 {
4256 asection *got, *relgot;
4257 flagword flags;
4258 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4259
4260 if (!is_ppc64_elf (abfd))
4261 return FALSE;
4262 if (htab == NULL)
4263 return FALSE;
4264
4265 if (!htab->got)
4266 {
4267 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4268 return FALSE;
4269
4270 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4271 if (!htab->got)
4272 abort ();
4273 }
4274
4275 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4276 | SEC_LINKER_CREATED);
4277
4278 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4279 if (!got
4280 || !bfd_set_section_alignment (abfd, got, 3))
4281 return FALSE;
4282
4283 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4284 flags | SEC_READONLY);
4285 if (!relgot
4286 || ! bfd_set_section_alignment (abfd, relgot, 3))
4287 return FALSE;
4288
4289 ppc64_elf_tdata (abfd)->got = got;
4290 ppc64_elf_tdata (abfd)->relgot = relgot;
4291 return TRUE;
4292 }
4293
4294 /* Create the dynamic sections, and set up shortcuts. */
4295
4296 static bfd_boolean
4297 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4298 {
4299 struct ppc_link_hash_table *htab;
4300
4301 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4302 return FALSE;
4303
4304 htab = ppc_hash_table (info);
4305 if (htab == NULL)
4306 return FALSE;
4307
4308 if (!htab->got)
4309 htab->got = bfd_get_section_by_name (dynobj, ".got");
4310 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4311 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4312 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4313 if (!info->shared)
4314 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4315
4316 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4317 || (!info->shared && !htab->relbss))
4318 abort ();
4319
4320 return TRUE;
4321 }
4322
4323 /* Follow indirect and warning symbol links. */
4324
4325 static inline struct bfd_link_hash_entry *
4326 follow_link (struct bfd_link_hash_entry *h)
4327 {
4328 while (h->type == bfd_link_hash_indirect
4329 || h->type == bfd_link_hash_warning)
4330 h = h->u.i.link;
4331 return h;
4332 }
4333
4334 static inline struct elf_link_hash_entry *
4335 elf_follow_link (struct elf_link_hash_entry *h)
4336 {
4337 return (struct elf_link_hash_entry *) follow_link (&h->root);
4338 }
4339
4340 static inline struct ppc_link_hash_entry *
4341 ppc_follow_link (struct ppc_link_hash_entry *h)
4342 {
4343 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4344 }
4345
4346 /* Merge PLT info on FROM with that on TO. */
4347
4348 static void
4349 move_plt_plist (struct ppc_link_hash_entry *from,
4350 struct ppc_link_hash_entry *to)
4351 {
4352 if (from->elf.plt.plist != NULL)
4353 {
4354 if (to->elf.plt.plist != NULL)
4355 {
4356 struct plt_entry **entp;
4357 struct plt_entry *ent;
4358
4359 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4360 {
4361 struct plt_entry *dent;
4362
4363 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4364 if (dent->addend == ent->addend)
4365 {
4366 dent->plt.refcount += ent->plt.refcount;
4367 *entp = ent->next;
4368 break;
4369 }
4370 if (dent == NULL)
4371 entp = &ent->next;
4372 }
4373 *entp = to->elf.plt.plist;
4374 }
4375
4376 to->elf.plt.plist = from->elf.plt.plist;
4377 from->elf.plt.plist = NULL;
4378 }
4379 }
4380
4381 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4382
4383 static void
4384 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4385 struct elf_link_hash_entry *dir,
4386 struct elf_link_hash_entry *ind)
4387 {
4388 struct ppc_link_hash_entry *edir, *eind;
4389
4390 edir = (struct ppc_link_hash_entry *) dir;
4391 eind = (struct ppc_link_hash_entry *) ind;
4392
4393 /* Copy over any dynamic relocs we may have on the indirect sym. */
4394 if (eind->dyn_relocs != NULL)
4395 {
4396 if (edir->dyn_relocs != NULL)
4397 {
4398 struct ppc_dyn_relocs **pp;
4399 struct ppc_dyn_relocs *p;
4400
4401 /* Add reloc counts against the indirect sym to the direct sym
4402 list. Merge any entries against the same section. */
4403 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4404 {
4405 struct ppc_dyn_relocs *q;
4406
4407 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4408 if (q->sec == p->sec)
4409 {
4410 q->pc_count += p->pc_count;
4411 q->count += p->count;
4412 *pp = p->next;
4413 break;
4414 }
4415 if (q == NULL)
4416 pp = &p->next;
4417 }
4418 *pp = edir->dyn_relocs;
4419 }
4420
4421 edir->dyn_relocs = eind->dyn_relocs;
4422 eind->dyn_relocs = NULL;
4423 }
4424
4425 edir->is_func |= eind->is_func;
4426 edir->is_func_descriptor |= eind->is_func_descriptor;
4427 edir->tls_mask |= eind->tls_mask;
4428 if (eind->oh != NULL)
4429 edir->oh = ppc_follow_link (eind->oh);
4430
4431 /* If called to transfer flags for a weakdef during processing
4432 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4433 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4434 if (!(ELIMINATE_COPY_RELOCS
4435 && eind->elf.root.type != bfd_link_hash_indirect
4436 && edir->elf.dynamic_adjusted))
4437 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4438
4439 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4440 edir->elf.ref_regular |= eind->elf.ref_regular;
4441 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4442 edir->elf.needs_plt |= eind->elf.needs_plt;
4443
4444 /* If we were called to copy over info for a weak sym, that's all. */
4445 if (eind->elf.root.type != bfd_link_hash_indirect)
4446 return;
4447
4448 /* Copy over got entries that we may have already seen to the
4449 symbol which just became indirect. */
4450 if (eind->elf.got.glist != NULL)
4451 {
4452 if (edir->elf.got.glist != NULL)
4453 {
4454 struct got_entry **entp;
4455 struct got_entry *ent;
4456
4457 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4458 {
4459 struct got_entry *dent;
4460
4461 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4462 if (dent->addend == ent->addend
4463 && dent->owner == ent->owner
4464 && dent->tls_type == ent->tls_type)
4465 {
4466 dent->got.refcount += ent->got.refcount;
4467 *entp = ent->next;
4468 break;
4469 }
4470 if (dent == NULL)
4471 entp = &ent->next;
4472 }
4473 *entp = edir->elf.got.glist;
4474 }
4475
4476 edir->elf.got.glist = eind->elf.got.glist;
4477 eind->elf.got.glist = NULL;
4478 }
4479
4480 /* And plt entries. */
4481 move_plt_plist (eind, edir);
4482
4483 if (eind->elf.dynindx != -1)
4484 {
4485 if (edir->elf.dynindx != -1)
4486 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4487 edir->elf.dynstr_index);
4488 edir->elf.dynindx = eind->elf.dynindx;
4489 edir->elf.dynstr_index = eind->elf.dynstr_index;
4490 eind->elf.dynindx = -1;
4491 eind->elf.dynstr_index = 0;
4492 }
4493 }
4494
4495 /* Find the function descriptor hash entry from the given function code
4496 hash entry FH. Link the entries via their OH fields. */
4497
4498 static struct ppc_link_hash_entry *
4499 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4500 {
4501 struct ppc_link_hash_entry *fdh = fh->oh;
4502
4503 if (fdh == NULL)
4504 {
4505 const char *fd_name = fh->elf.root.root.string + 1;
4506
4507 fdh = (struct ppc_link_hash_entry *)
4508 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4509 if (fdh == NULL)
4510 return fdh;
4511
4512 fdh->is_func_descriptor = 1;
4513 fdh->oh = fh;
4514 fh->is_func = 1;
4515 fh->oh = fdh;
4516 }
4517
4518 return ppc_follow_link (fdh);
4519 }
4520
4521 /* Make a fake function descriptor sym for the code sym FH. */
4522
4523 static struct ppc_link_hash_entry *
4524 make_fdh (struct bfd_link_info *info,
4525 struct ppc_link_hash_entry *fh)
4526 {
4527 bfd *abfd;
4528 asymbol *newsym;
4529 struct bfd_link_hash_entry *bh;
4530 struct ppc_link_hash_entry *fdh;
4531
4532 abfd = fh->elf.root.u.undef.abfd;
4533 newsym = bfd_make_empty_symbol (abfd);
4534 newsym->name = fh->elf.root.root.string + 1;
4535 newsym->section = bfd_und_section_ptr;
4536 newsym->value = 0;
4537 newsym->flags = BSF_WEAK;
4538
4539 bh = NULL;
4540 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4541 newsym->flags, newsym->section,
4542 newsym->value, NULL, FALSE, FALSE,
4543 &bh))
4544 return NULL;
4545
4546 fdh = (struct ppc_link_hash_entry *) bh;
4547 fdh->elf.non_elf = 0;
4548 fdh->fake = 1;
4549 fdh->is_func_descriptor = 1;
4550 fdh->oh = fh;
4551 fh->is_func = 1;
4552 fh->oh = fdh;
4553 return fdh;
4554 }
4555
4556 /* Fix function descriptor symbols defined in .opd sections to be
4557 function type. */
4558
4559 static bfd_boolean
4560 ppc64_elf_add_symbol_hook (bfd *ibfd,
4561 struct bfd_link_info *info,
4562 Elf_Internal_Sym *isym,
4563 const char **name ATTRIBUTE_UNUSED,
4564 flagword *flags ATTRIBUTE_UNUSED,
4565 asection **sec,
4566 bfd_vma *value ATTRIBUTE_UNUSED)
4567 {
4568 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4569 {
4570 if ((ibfd->flags & DYNAMIC) == 0)
4571 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4572 }
4573 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4574 ;
4575 else if (*sec != NULL
4576 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4577 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4578
4579 return TRUE;
4580 }
4581
4582 /* This function makes an old ABI object reference to ".bar" cause the
4583 inclusion of a new ABI object archive that defines "bar".
4584 NAME is a symbol defined in an archive. Return a symbol in the hash
4585 table that might be satisfied by the archive symbols. */
4586
4587 static struct elf_link_hash_entry *
4588 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4589 struct bfd_link_info *info,
4590 const char *name)
4591 {
4592 struct elf_link_hash_entry *h;
4593 char *dot_name;
4594 size_t len;
4595
4596 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4597 if (h != NULL
4598 /* Don't return this sym if it is a fake function descriptor
4599 created by add_symbol_adjust. */
4600 && !(h->root.type == bfd_link_hash_undefweak
4601 && ((struct ppc_link_hash_entry *) h)->fake))
4602 return h;
4603
4604 if (name[0] == '.')
4605 return h;
4606
4607 len = strlen (name);
4608 dot_name = bfd_alloc (abfd, len + 2);
4609 if (dot_name == NULL)
4610 return (struct elf_link_hash_entry *) 0 - 1;
4611 dot_name[0] = '.';
4612 memcpy (dot_name + 1, name, len + 1);
4613 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4614 bfd_release (abfd, dot_name);
4615 return h;
4616 }
4617
4618 /* This function satisfies all old ABI object references to ".bar" if a
4619 new ABI object defines "bar". Well, at least, undefined dot symbols
4620 are made weak. This stops later archive searches from including an
4621 object if we already have a function descriptor definition. It also
4622 prevents the linker complaining about undefined symbols.
4623 We also check and correct mismatched symbol visibility here. The
4624 most restrictive visibility of the function descriptor and the
4625 function entry symbol is used. */
4626
4627 static bfd_boolean
4628 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4629 {
4630 struct ppc_link_hash_table *htab;
4631 struct ppc_link_hash_entry *fdh;
4632
4633 if (eh->elf.root.type == bfd_link_hash_indirect)
4634 return TRUE;
4635
4636 if (eh->elf.root.type == bfd_link_hash_warning)
4637 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4638
4639 if (eh->elf.root.root.string[0] != '.')
4640 abort ();
4641
4642 htab = ppc_hash_table (info);
4643 if (htab == NULL)
4644 return FALSE;
4645
4646 fdh = lookup_fdh (eh, htab);
4647 if (fdh == NULL)
4648 {
4649 if (!info->relocatable
4650 && (eh->elf.root.type == bfd_link_hash_undefined
4651 || eh->elf.root.type == bfd_link_hash_undefweak)
4652 && eh->elf.ref_regular)
4653 {
4654 /* Make an undefweak function descriptor sym, which is enough to
4655 pull in an --as-needed shared lib, but won't cause link
4656 errors. Archives are handled elsewhere. */
4657 fdh = make_fdh (info, eh);
4658 if (fdh == NULL)
4659 return FALSE;
4660 fdh->elf.ref_regular = 1;
4661 }
4662 }
4663 else
4664 {
4665 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4666 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4667 if (entry_vis < descr_vis)
4668 fdh->elf.other += entry_vis - descr_vis;
4669 else if (entry_vis > descr_vis)
4670 eh->elf.other += descr_vis - entry_vis;
4671
4672 if ((fdh->elf.root.type == bfd_link_hash_defined
4673 || fdh->elf.root.type == bfd_link_hash_defweak)
4674 && eh->elf.root.type == bfd_link_hash_undefined)
4675 {
4676 eh->elf.root.type = bfd_link_hash_undefweak;
4677 eh->was_undefined = 1;
4678 htab->twiddled_syms = 1;
4679 }
4680 }
4681
4682 return TRUE;
4683 }
4684
4685 /* Process list of dot-symbols we made in link_hash_newfunc. */
4686
4687 static bfd_boolean
4688 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4689 {
4690 struct ppc_link_hash_table *htab;
4691 struct ppc_link_hash_entry **p, *eh;
4692
4693 if (!is_ppc64_elf (info->output_bfd))
4694 return TRUE;
4695 htab = ppc_hash_table (info);
4696 if (htab == NULL)
4697 return FALSE;
4698
4699 if (is_ppc64_elf (ibfd))
4700 {
4701 p = &htab->dot_syms;
4702 while ((eh = *p) != NULL)
4703 {
4704 *p = NULL;
4705 if (!add_symbol_adjust (eh, info))
4706 return FALSE;
4707 p = &eh->u.next_dot_sym;
4708 }
4709 }
4710
4711 /* Clear the list for non-ppc64 input files. */
4712 p = &htab->dot_syms;
4713 while ((eh = *p) != NULL)
4714 {
4715 *p = NULL;
4716 p = &eh->u.next_dot_sym;
4717 }
4718
4719 /* We need to fix the undefs list for any syms we have twiddled to
4720 undef_weak. */
4721 if (htab->twiddled_syms)
4722 {
4723 bfd_link_repair_undef_list (&htab->elf.root);
4724 htab->twiddled_syms = 0;
4725 }
4726 return TRUE;
4727 }
4728
4729 /* Undo hash table changes when an --as-needed input file is determined
4730 not to be needed. */
4731
4732 static bfd_boolean
4733 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4734 struct bfd_link_info *info)
4735 {
4736 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4737
4738 if (htab == NULL)
4739 return FALSE;
4740
4741 htab->dot_syms = NULL;
4742 return TRUE;
4743 }
4744
4745 static struct plt_entry **
4746 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4747 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4748 {
4749 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4750 struct plt_entry **local_plt;
4751 unsigned char *local_got_tls_masks;
4752
4753 if (local_got_ents == NULL)
4754 {
4755 bfd_size_type size = symtab_hdr->sh_info;
4756
4757 size *= (sizeof (*local_got_ents)
4758 + sizeof (*local_plt)
4759 + sizeof (*local_got_tls_masks));
4760 local_got_ents = bfd_zalloc (abfd, size);
4761 if (local_got_ents == NULL)
4762 return NULL;
4763 elf_local_got_ents (abfd) = local_got_ents;
4764 }
4765
4766 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4767 {
4768 struct got_entry *ent;
4769
4770 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4771 if (ent->addend == r_addend
4772 && ent->owner == abfd
4773 && ent->tls_type == tls_type)
4774 break;
4775 if (ent == NULL)
4776 {
4777 bfd_size_type amt = sizeof (*ent);
4778 ent = bfd_alloc (abfd, amt);
4779 if (ent == NULL)
4780 return FALSE;
4781 ent->next = local_got_ents[r_symndx];
4782 ent->addend = r_addend;
4783 ent->owner = abfd;
4784 ent->tls_type = tls_type;
4785 ent->is_indirect = FALSE;
4786 ent->got.refcount = 0;
4787 local_got_ents[r_symndx] = ent;
4788 }
4789 ent->got.refcount += 1;
4790 }
4791
4792 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4793 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4794 local_got_tls_masks[r_symndx] |= tls_type;
4795
4796 return local_plt + r_symndx;
4797 }
4798
4799 static bfd_boolean
4800 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4801 {
4802 struct plt_entry *ent;
4803
4804 for (ent = *plist; ent != NULL; ent = ent->next)
4805 if (ent->addend == addend)
4806 break;
4807 if (ent == NULL)
4808 {
4809 bfd_size_type amt = sizeof (*ent);
4810 ent = bfd_alloc (abfd, amt);
4811 if (ent == NULL)
4812 return FALSE;
4813 ent->next = *plist;
4814 ent->addend = addend;
4815 ent->plt.refcount = 0;
4816 *plist = ent;
4817 }
4818 ent->plt.refcount += 1;
4819 return TRUE;
4820 }
4821
4822 static bfd_boolean
4823 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4824 {
4825 return (r_type == R_PPC64_REL24
4826 || r_type == R_PPC64_REL14
4827 || r_type == R_PPC64_REL14_BRTAKEN
4828 || r_type == R_PPC64_REL14_BRNTAKEN
4829 || r_type == R_PPC64_ADDR24
4830 || r_type == R_PPC64_ADDR14
4831 || r_type == R_PPC64_ADDR14_BRTAKEN
4832 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4833 }
4834
4835 /* Look through the relocs for a section during the first phase, and
4836 calculate needed space in the global offset table, procedure
4837 linkage table, and dynamic reloc sections. */
4838
4839 static bfd_boolean
4840 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4841 asection *sec, const Elf_Internal_Rela *relocs)
4842 {
4843 struct ppc_link_hash_table *htab;
4844 Elf_Internal_Shdr *symtab_hdr;
4845 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4846 const Elf_Internal_Rela *rel;
4847 const Elf_Internal_Rela *rel_end;
4848 asection *sreloc;
4849 asection **opd_sym_map;
4850 struct elf_link_hash_entry *tga, *dottga;
4851
4852 if (info->relocatable)
4853 return TRUE;
4854
4855 /* Don't do anything special with non-loaded, non-alloced sections.
4856 In particular, any relocs in such sections should not affect GOT
4857 and PLT reference counting (ie. we don't allow them to create GOT
4858 or PLT entries), there's no possibility or desire to optimize TLS
4859 relocs, and there's not much point in propagating relocs to shared
4860 libs that the dynamic linker won't relocate. */
4861 if ((sec->flags & SEC_ALLOC) == 0)
4862 return TRUE;
4863
4864 BFD_ASSERT (is_ppc64_elf (abfd));
4865
4866 htab = ppc_hash_table (info);
4867 if (htab == NULL)
4868 return FALSE;
4869
4870 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4871 FALSE, FALSE, TRUE);
4872 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4873 FALSE, FALSE, TRUE);
4874 symtab_hdr = &elf_symtab_hdr (abfd);
4875
4876 sym_hashes = elf_sym_hashes (abfd);
4877 sym_hashes_end = (sym_hashes
4878 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4879 - symtab_hdr->sh_info);
4880
4881 sreloc = NULL;
4882 opd_sym_map = NULL;
4883 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4884 {
4885 /* Garbage collection needs some extra help with .opd sections.
4886 We don't want to necessarily keep everything referenced by
4887 relocs in .opd, as that would keep all functions. Instead,
4888 if we reference an .opd symbol (a function descriptor), we
4889 want to keep the function code symbol's section. This is
4890 easy for global symbols, but for local syms we need to keep
4891 information about the associated function section. */
4892 bfd_size_type amt;
4893
4894 amt = sec->size * sizeof (*opd_sym_map) / 8;
4895 opd_sym_map = bfd_zalloc (abfd, amt);
4896 if (opd_sym_map == NULL)
4897 return FALSE;
4898 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4899 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4900 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4901 }
4902
4903 if (htab->sfpr == NULL
4904 && !create_linkage_sections (htab->elf.dynobj, info))
4905 return FALSE;
4906
4907 rel_end = relocs + sec->reloc_count;
4908 for (rel = relocs; rel < rel_end; rel++)
4909 {
4910 unsigned long r_symndx;
4911 struct elf_link_hash_entry *h;
4912 enum elf_ppc64_reloc_type r_type;
4913 int tls_type;
4914 struct _ppc64_elf_section_data *ppc64_sec;
4915 struct plt_entry **ifunc;
4916
4917 r_symndx = ELF64_R_SYM (rel->r_info);
4918 if (r_symndx < symtab_hdr->sh_info)
4919 h = NULL;
4920 else
4921 {
4922 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4923 h = elf_follow_link (h);
4924 }
4925
4926 tls_type = 0;
4927 ifunc = NULL;
4928 if (h != NULL)
4929 {
4930 if (h->type == STT_GNU_IFUNC)
4931 {
4932 h->needs_plt = 1;
4933 ifunc = &h->plt.plist;
4934 }
4935 }
4936 else
4937 {
4938 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4939 abfd, r_symndx);
4940 if (isym == NULL)
4941 return FALSE;
4942
4943 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4944 {
4945 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4946 rel->r_addend, PLT_IFUNC);
4947 if (ifunc == NULL)
4948 return FALSE;
4949 }
4950 }
4951 r_type = ELF64_R_TYPE (rel->r_info);
4952 if (is_branch_reloc (r_type))
4953 {
4954 if (h != NULL && (h == tga || h == dottga))
4955 {
4956 if (rel != relocs
4957 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4958 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4959 /* We have a new-style __tls_get_addr call with a marker
4960 reloc. */
4961 ;
4962 else
4963 /* Mark this section as having an old-style call. */
4964 sec->has_tls_get_addr_call = 1;
4965 }
4966
4967 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4968 if (ifunc != NULL
4969 && !update_plt_info (abfd, ifunc, rel->r_addend))
4970 return FALSE;
4971 }
4972
4973 switch (r_type)
4974 {
4975 case R_PPC64_TLSGD:
4976 case R_PPC64_TLSLD:
4977 /* These special tls relocs tie a call to __tls_get_addr with
4978 its parameter symbol. */
4979 break;
4980
4981 case R_PPC64_GOT_TLSLD16:
4982 case R_PPC64_GOT_TLSLD16_LO:
4983 case R_PPC64_GOT_TLSLD16_HI:
4984 case R_PPC64_GOT_TLSLD16_HA:
4985 tls_type = TLS_TLS | TLS_LD;
4986 goto dogottls;
4987
4988 case R_PPC64_GOT_TLSGD16:
4989 case R_PPC64_GOT_TLSGD16_LO:
4990 case R_PPC64_GOT_TLSGD16_HI:
4991 case R_PPC64_GOT_TLSGD16_HA:
4992 tls_type = TLS_TLS | TLS_GD;
4993 goto dogottls;
4994
4995 case R_PPC64_GOT_TPREL16_DS:
4996 case R_PPC64_GOT_TPREL16_LO_DS:
4997 case R_PPC64_GOT_TPREL16_HI:
4998 case R_PPC64_GOT_TPREL16_HA:
4999 if (!info->executable)
5000 info->flags |= DF_STATIC_TLS;
5001 tls_type = TLS_TLS | TLS_TPREL;
5002 goto dogottls;
5003
5004 case R_PPC64_GOT_DTPREL16_DS:
5005 case R_PPC64_GOT_DTPREL16_LO_DS:
5006 case R_PPC64_GOT_DTPREL16_HI:
5007 case R_PPC64_GOT_DTPREL16_HA:
5008 tls_type = TLS_TLS | TLS_DTPREL;
5009 dogottls:
5010 sec->has_tls_reloc = 1;
5011 /* Fall thru */
5012
5013 case R_PPC64_GOT16:
5014 case R_PPC64_GOT16_DS:
5015 case R_PPC64_GOT16_HA:
5016 case R_PPC64_GOT16_HI:
5017 case R_PPC64_GOT16_LO:
5018 case R_PPC64_GOT16_LO_DS:
5019 /* This symbol requires a global offset table entry. */
5020 sec->has_toc_reloc = 1;
5021 if (r_type == R_PPC64_GOT_TLSLD16
5022 || r_type == R_PPC64_GOT_TLSGD16
5023 || r_type == R_PPC64_GOT_TPREL16_DS
5024 || r_type == R_PPC64_GOT_DTPREL16_DS
5025 || r_type == R_PPC64_GOT16
5026 || r_type == R_PPC64_GOT16_DS)
5027 {
5028 htab->do_multi_toc = 1;
5029 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5030 }
5031
5032 if (ppc64_elf_tdata (abfd)->got == NULL
5033 && !create_got_section (abfd, info))
5034 return FALSE;
5035
5036 if (h != NULL)
5037 {
5038 struct ppc_link_hash_entry *eh;
5039 struct got_entry *ent;
5040
5041 eh = (struct ppc_link_hash_entry *) h;
5042 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5043 if (ent->addend == rel->r_addend
5044 && ent->owner == abfd
5045 && ent->tls_type == tls_type)
5046 break;
5047 if (ent == NULL)
5048 {
5049 bfd_size_type amt = sizeof (*ent);
5050 ent = bfd_alloc (abfd, amt);
5051 if (ent == NULL)
5052 return FALSE;
5053 ent->next = eh->elf.got.glist;
5054 ent->addend = rel->r_addend;
5055 ent->owner = abfd;
5056 ent->tls_type = tls_type;
5057 ent->is_indirect = FALSE;
5058 ent->got.refcount = 0;
5059 eh->elf.got.glist = ent;
5060 }
5061 ent->got.refcount += 1;
5062 eh->tls_mask |= tls_type;
5063 }
5064 else
5065 /* This is a global offset table entry for a local symbol. */
5066 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5067 rel->r_addend, tls_type))
5068 return FALSE;
5069 break;
5070
5071 case R_PPC64_PLT16_HA:
5072 case R_PPC64_PLT16_HI:
5073 case R_PPC64_PLT16_LO:
5074 case R_PPC64_PLT32:
5075 case R_PPC64_PLT64:
5076 /* This symbol requires a procedure linkage table entry. We
5077 actually build the entry in adjust_dynamic_symbol,
5078 because this might be a case of linking PIC code without
5079 linking in any dynamic objects, in which case we don't
5080 need to generate a procedure linkage table after all. */
5081 if (h == NULL)
5082 {
5083 /* It does not make sense to have a procedure linkage
5084 table entry for a local symbol. */
5085 bfd_set_error (bfd_error_bad_value);
5086 return FALSE;
5087 }
5088 else
5089 {
5090 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5091 return FALSE;
5092 h->needs_plt = 1;
5093 if (h->root.root.string[0] == '.'
5094 && h->root.root.string[1] != '\0')
5095 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5096 }
5097 break;
5098
5099 /* The following relocations don't need to propagate the
5100 relocation if linking a shared object since they are
5101 section relative. */
5102 case R_PPC64_SECTOFF:
5103 case R_PPC64_SECTOFF_LO:
5104 case R_PPC64_SECTOFF_HI:
5105 case R_PPC64_SECTOFF_HA:
5106 case R_PPC64_SECTOFF_DS:
5107 case R_PPC64_SECTOFF_LO_DS:
5108 case R_PPC64_DTPREL16:
5109 case R_PPC64_DTPREL16_LO:
5110 case R_PPC64_DTPREL16_HI:
5111 case R_PPC64_DTPREL16_HA:
5112 case R_PPC64_DTPREL16_DS:
5113 case R_PPC64_DTPREL16_LO_DS:
5114 case R_PPC64_DTPREL16_HIGHER:
5115 case R_PPC64_DTPREL16_HIGHERA:
5116 case R_PPC64_DTPREL16_HIGHEST:
5117 case R_PPC64_DTPREL16_HIGHESTA:
5118 break;
5119
5120 /* Nor do these. */
5121 case R_PPC64_REL16:
5122 case R_PPC64_REL16_LO:
5123 case R_PPC64_REL16_HI:
5124 case R_PPC64_REL16_HA:
5125 break;
5126
5127 case R_PPC64_TOC16:
5128 case R_PPC64_TOC16_DS:
5129 htab->do_multi_toc = 1;
5130 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5131 case R_PPC64_TOC16_LO:
5132 case R_PPC64_TOC16_HI:
5133 case R_PPC64_TOC16_HA:
5134 case R_PPC64_TOC16_LO_DS:
5135 sec->has_toc_reloc = 1;
5136 break;
5137
5138 /* This relocation describes the C++ object vtable hierarchy.
5139 Reconstruct it for later use during GC. */
5140 case R_PPC64_GNU_VTINHERIT:
5141 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5142 return FALSE;
5143 break;
5144
5145 /* This relocation describes which C++ vtable entries are actually
5146 used. Record for later use during GC. */
5147 case R_PPC64_GNU_VTENTRY:
5148 BFD_ASSERT (h != NULL);
5149 if (h != NULL
5150 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5151 return FALSE;
5152 break;
5153
5154 case R_PPC64_REL14:
5155 case R_PPC64_REL14_BRTAKEN:
5156 case R_PPC64_REL14_BRNTAKEN:
5157 {
5158 asection *dest = NULL;
5159
5160 /* Heuristic: If jumping outside our section, chances are
5161 we are going to need a stub. */
5162 if (h != NULL)
5163 {
5164 /* If the sym is weak it may be overridden later, so
5165 don't assume we know where a weak sym lives. */
5166 if (h->root.type == bfd_link_hash_defined)
5167 dest = h->root.u.def.section;
5168 }
5169 else
5170 {
5171 Elf_Internal_Sym *isym;
5172
5173 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5174 abfd, r_symndx);
5175 if (isym == NULL)
5176 return FALSE;
5177
5178 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5179 }
5180
5181 if (dest != sec)
5182 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5183 }
5184 /* Fall through. */
5185
5186 case R_PPC64_REL24:
5187 if (h != NULL && ifunc == NULL)
5188 {
5189 /* We may need a .plt entry if the function this reloc
5190 refers to is in a shared lib. */
5191 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5192 return FALSE;
5193 h->needs_plt = 1;
5194 if (h->root.root.string[0] == '.'
5195 && h->root.root.string[1] != '\0')
5196 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5197 if (h == tga || h == dottga)
5198 sec->has_tls_reloc = 1;
5199 }
5200 break;
5201
5202 case R_PPC64_TPREL64:
5203 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5204 if (!info->executable)
5205 info->flags |= DF_STATIC_TLS;
5206 goto dotlstoc;
5207
5208 case R_PPC64_DTPMOD64:
5209 if (rel + 1 < rel_end
5210 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5211 && rel[1].r_offset == rel->r_offset + 8)
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5213 else
5214 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5215 goto dotlstoc;
5216
5217 case R_PPC64_DTPREL64:
5218 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5219 if (rel != relocs
5220 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5221 && rel[-1].r_offset == rel->r_offset - 8)
5222 /* This is the second reloc of a dtpmod, dtprel pair.
5223 Don't mark with TLS_DTPREL. */
5224 goto dodyn;
5225
5226 dotlstoc:
5227 sec->has_tls_reloc = 1;
5228 if (h != NULL)
5229 {
5230 struct ppc_link_hash_entry *eh;
5231 eh = (struct ppc_link_hash_entry *) h;
5232 eh->tls_mask |= tls_type;
5233 }
5234 else
5235 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5236 rel->r_addend, tls_type))
5237 return FALSE;
5238
5239 ppc64_sec = ppc64_elf_section_data (sec);
5240 if (ppc64_sec->sec_type != sec_toc)
5241 {
5242 bfd_size_type amt;
5243
5244 /* One extra to simplify get_tls_mask. */
5245 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5246 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5247 if (ppc64_sec->u.toc.symndx == NULL)
5248 return FALSE;
5249 amt = sec->size * sizeof (bfd_vma) / 8;
5250 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5251 if (ppc64_sec->u.toc.add == NULL)
5252 return FALSE;
5253 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5254 ppc64_sec->sec_type = sec_toc;
5255 }
5256 BFD_ASSERT (rel->r_offset % 8 == 0);
5257 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5258 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5259
5260 /* Mark the second slot of a GD or LD entry.
5261 -1 to indicate GD and -2 to indicate LD. */
5262 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5263 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5264 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5265 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5266 goto dodyn;
5267
5268 case R_PPC64_TPREL16:
5269 case R_PPC64_TPREL16_LO:
5270 case R_PPC64_TPREL16_HI:
5271 case R_PPC64_TPREL16_HA:
5272 case R_PPC64_TPREL16_DS:
5273 case R_PPC64_TPREL16_LO_DS:
5274 case R_PPC64_TPREL16_HIGHER:
5275 case R_PPC64_TPREL16_HIGHERA:
5276 case R_PPC64_TPREL16_HIGHEST:
5277 case R_PPC64_TPREL16_HIGHESTA:
5278 if (info->shared)
5279 {
5280 if (!info->executable)
5281 info->flags |= DF_STATIC_TLS;
5282 goto dodyn;
5283 }
5284 break;
5285
5286 case R_PPC64_ADDR64:
5287 if (opd_sym_map != NULL
5288 && rel + 1 < rel_end
5289 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5290 {
5291 if (h != NULL)
5292 {
5293 if (h->root.root.string[0] == '.'
5294 && h->root.root.string[1] != 0
5295 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5296 ;
5297 else
5298 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5299 }
5300 else
5301 {
5302 asection *s;
5303 Elf_Internal_Sym *isym;
5304
5305 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5306 abfd, r_symndx);
5307 if (isym == NULL)
5308 return FALSE;
5309
5310 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5311 if (s != NULL && s != sec)
5312 opd_sym_map[rel->r_offset / 8] = s;
5313 }
5314 }
5315 /* Fall through. */
5316
5317 case R_PPC64_REL30:
5318 case R_PPC64_REL32:
5319 case R_PPC64_REL64:
5320 case R_PPC64_ADDR14:
5321 case R_PPC64_ADDR14_BRNTAKEN:
5322 case R_PPC64_ADDR14_BRTAKEN:
5323 case R_PPC64_ADDR16:
5324 case R_PPC64_ADDR16_DS:
5325 case R_PPC64_ADDR16_HA:
5326 case R_PPC64_ADDR16_HI:
5327 case R_PPC64_ADDR16_HIGHER:
5328 case R_PPC64_ADDR16_HIGHERA:
5329 case R_PPC64_ADDR16_HIGHEST:
5330 case R_PPC64_ADDR16_HIGHESTA:
5331 case R_PPC64_ADDR16_LO:
5332 case R_PPC64_ADDR16_LO_DS:
5333 case R_PPC64_ADDR24:
5334 case R_PPC64_ADDR32:
5335 case R_PPC64_UADDR16:
5336 case R_PPC64_UADDR32:
5337 case R_PPC64_UADDR64:
5338 case R_PPC64_TOC:
5339 if (h != NULL && !info->shared)
5340 /* We may need a copy reloc. */
5341 h->non_got_ref = 1;
5342
5343 /* Don't propagate .opd relocs. */
5344 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5345 break;
5346
5347 /* If we are creating a shared library, and this is a reloc
5348 against a global symbol, or a non PC relative reloc
5349 against a local symbol, then we need to copy the reloc
5350 into the shared library. However, if we are linking with
5351 -Bsymbolic, we do not need to copy a reloc against a
5352 global symbol which is defined in an object we are
5353 including in the link (i.e., DEF_REGULAR is set). At
5354 this point we have not seen all the input files, so it is
5355 possible that DEF_REGULAR is not set now but will be set
5356 later (it is never cleared). In case of a weak definition,
5357 DEF_REGULAR may be cleared later by a strong definition in
5358 a shared library. We account for that possibility below by
5359 storing information in the dyn_relocs field of the hash
5360 table entry. A similar situation occurs when creating
5361 shared libraries and symbol visibility changes render the
5362 symbol local.
5363
5364 If on the other hand, we are creating an executable, we
5365 may need to keep relocations for symbols satisfied by a
5366 dynamic library if we manage to avoid copy relocs for the
5367 symbol. */
5368 dodyn:
5369 if ((info->shared
5370 && (must_be_dyn_reloc (info, r_type)
5371 || (h != NULL
5372 && (! info->symbolic
5373 || h->root.type == bfd_link_hash_defweak
5374 || !h->def_regular))))
5375 || (ELIMINATE_COPY_RELOCS
5376 && !info->shared
5377 && h != NULL
5378 && (h->root.type == bfd_link_hash_defweak
5379 || !h->def_regular))
5380 || (!info->shared
5381 && ifunc != NULL))
5382 {
5383 struct ppc_dyn_relocs *p;
5384 struct ppc_dyn_relocs **head;
5385
5386 /* We must copy these reloc types into the output file.
5387 Create a reloc section in dynobj and make room for
5388 this reloc. */
5389 if (sreloc == NULL)
5390 {
5391 sreloc = _bfd_elf_make_dynamic_reloc_section
5392 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5393
5394 if (sreloc == NULL)
5395 return FALSE;
5396 }
5397
5398 /* If this is a global symbol, we count the number of
5399 relocations we need for this symbol. */
5400 if (h != NULL)
5401 {
5402 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5403 }
5404 else
5405 {
5406 /* Track dynamic relocs needed for local syms too.
5407 We really need local syms available to do this
5408 easily. Oh well. */
5409 asection *s;
5410 void *vpp;
5411 Elf_Internal_Sym *isym;
5412
5413 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5414 abfd, r_symndx);
5415 if (isym == NULL)
5416 return FALSE;
5417
5418 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5419 if (s == NULL)
5420 s = sec;
5421
5422 vpp = &elf_section_data (s)->local_dynrel;
5423 head = (struct ppc_dyn_relocs **) vpp;
5424 }
5425
5426 p = *head;
5427 if (p == NULL || p->sec != sec)
5428 {
5429 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5430 if (p == NULL)
5431 return FALSE;
5432 p->next = *head;
5433 *head = p;
5434 p->sec = sec;
5435 p->count = 0;
5436 p->pc_count = 0;
5437 }
5438
5439 p->count += 1;
5440 if (!must_be_dyn_reloc (info, r_type))
5441 p->pc_count += 1;
5442 }
5443 break;
5444
5445 default:
5446 break;
5447 }
5448 }
5449
5450 return TRUE;
5451 }
5452
5453 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5454 of the code entry point, and its section. */
5455
5456 static bfd_vma
5457 opd_entry_value (asection *opd_sec,
5458 bfd_vma offset,
5459 asection **code_sec,
5460 bfd_vma *code_off)
5461 {
5462 bfd *opd_bfd = opd_sec->owner;
5463 Elf_Internal_Rela *relocs;
5464 Elf_Internal_Rela *lo, *hi, *look;
5465 bfd_vma val;
5466
5467 /* No relocs implies we are linking a --just-symbols object. */
5468 if (opd_sec->reloc_count == 0)
5469 {
5470 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5471 return (bfd_vma) -1;
5472
5473 if (code_sec != NULL)
5474 {
5475 asection *sec, *likely = NULL;
5476 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5477 if (sec->vma <= val
5478 && (sec->flags & SEC_LOAD) != 0
5479 && (sec->flags & SEC_ALLOC) != 0)
5480 likely = sec;
5481 if (likely != NULL)
5482 {
5483 *code_sec = likely;
5484 if (code_off != NULL)
5485 *code_off = val - likely->vma;
5486 }
5487 }
5488 return val;
5489 }
5490
5491 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5492
5493 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5494 if (relocs == NULL)
5495 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5496
5497 /* Go find the opd reloc at the sym address. */
5498 lo = relocs;
5499 BFD_ASSERT (lo != NULL);
5500 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5501 val = (bfd_vma) -1;
5502 while (lo < hi)
5503 {
5504 look = lo + (hi - lo) / 2;
5505 if (look->r_offset < offset)
5506 lo = look + 1;
5507 else if (look->r_offset > offset)
5508 hi = look;
5509 else
5510 {
5511 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5512
5513 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5514 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5515 {
5516 unsigned long symndx = ELF64_R_SYM (look->r_info);
5517 asection *sec;
5518
5519 if (symndx < symtab_hdr->sh_info)
5520 {
5521 Elf_Internal_Sym *sym;
5522
5523 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5524 if (sym == NULL)
5525 {
5526 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5527 symtab_hdr->sh_info,
5528 0, NULL, NULL, NULL);
5529 if (sym == NULL)
5530 break;
5531 symtab_hdr->contents = (bfd_byte *) sym;
5532 }
5533
5534 sym += symndx;
5535 val = sym->st_value;
5536 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5537 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5538 }
5539 else
5540 {
5541 struct elf_link_hash_entry **sym_hashes;
5542 struct elf_link_hash_entry *rh;
5543
5544 sym_hashes = elf_sym_hashes (opd_bfd);
5545 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5546 rh = elf_follow_link (rh);
5547 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5548 || rh->root.type == bfd_link_hash_defweak);
5549 val = rh->root.u.def.value;
5550 sec = rh->root.u.def.section;
5551 }
5552 val += look->r_addend;
5553 if (code_off != NULL)
5554 *code_off = val;
5555 if (code_sec != NULL)
5556 *code_sec = sec;
5557 if (sec != NULL && sec->output_section != NULL)
5558 val += sec->output_section->vma + sec->output_offset;
5559 }
5560 break;
5561 }
5562 }
5563
5564 return val;
5565 }
5566
5567 /* If FDH is a function descriptor symbol, return the associated code
5568 entry symbol if it is defined. Return NULL otherwise. */
5569
5570 static struct ppc_link_hash_entry *
5571 defined_code_entry (struct ppc_link_hash_entry *fdh)
5572 {
5573 if (fdh->is_func_descriptor)
5574 {
5575 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5576 if (fh->elf.root.type == bfd_link_hash_defined
5577 || fh->elf.root.type == bfd_link_hash_defweak)
5578 return fh;
5579 }
5580 return NULL;
5581 }
5582
5583 /* If FH is a function code entry symbol, return the associated
5584 function descriptor symbol if it is defined. Return NULL otherwise. */
5585
5586 static struct ppc_link_hash_entry *
5587 defined_func_desc (struct ppc_link_hash_entry *fh)
5588 {
5589 if (fh->oh != NULL
5590 && fh->oh->is_func_descriptor)
5591 {
5592 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5593 if (fdh->elf.root.type == bfd_link_hash_defined
5594 || fdh->elf.root.type == bfd_link_hash_defweak)
5595 return fdh;
5596 }
5597 return NULL;
5598 }
5599
5600 /* Mark all our entry sym sections, both opd and code section. */
5601
5602 static void
5603 ppc64_elf_gc_keep (struct bfd_link_info *info)
5604 {
5605 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5606 struct bfd_sym_chain *sym;
5607
5608 if (htab == NULL)
5609 return;
5610
5611 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5612 {
5613 struct ppc_link_hash_entry *eh, *fh;
5614 asection *sec;
5615
5616 eh = (struct ppc_link_hash_entry *)
5617 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5618 if (eh == NULL)
5619 continue;
5620 if (eh->elf.root.type != bfd_link_hash_defined
5621 && eh->elf.root.type != bfd_link_hash_defweak)
5622 continue;
5623
5624 fh = defined_code_entry (eh);
5625 if (fh != NULL)
5626 {
5627 sec = fh->elf.root.u.def.section;
5628 sec->flags |= SEC_KEEP;
5629 }
5630 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5631 && opd_entry_value (eh->elf.root.u.def.section,
5632 eh->elf.root.u.def.value,
5633 &sec, NULL) != (bfd_vma) -1)
5634 sec->flags |= SEC_KEEP;
5635
5636 sec = eh->elf.root.u.def.section;
5637 sec->flags |= SEC_KEEP;
5638 }
5639 }
5640
5641 /* Mark sections containing dynamically referenced symbols. When
5642 building shared libraries, we must assume that any visible symbol is
5643 referenced. */
5644
5645 static bfd_boolean
5646 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5647 {
5648 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5649 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5650 struct ppc_link_hash_entry *fdh;
5651
5652 if (eh->elf.root.type == bfd_link_hash_warning)
5653 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5654
5655 /* Dynamic linking info is on the func descriptor sym. */
5656 fdh = defined_func_desc (eh);
5657 if (fdh != NULL)
5658 eh = fdh;
5659
5660 if ((eh->elf.root.type == bfd_link_hash_defined
5661 || eh->elf.root.type == bfd_link_hash_defweak)
5662 && (eh->elf.ref_dynamic
5663 || (!info->executable
5664 && eh->elf.def_regular
5665 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5666 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5667 {
5668 asection *code_sec;
5669 struct ppc_link_hash_entry *fh;
5670
5671 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5672
5673 /* Function descriptor syms cause the associated
5674 function code sym section to be marked. */
5675 fh = defined_code_entry (eh);
5676 if (fh != NULL)
5677 {
5678 code_sec = fh->elf.root.u.def.section;
5679 code_sec->flags |= SEC_KEEP;
5680 }
5681 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5682 && opd_entry_value (eh->elf.root.u.def.section,
5683 eh->elf.root.u.def.value,
5684 &code_sec, NULL) != (bfd_vma) -1)
5685 code_sec->flags |= SEC_KEEP;
5686 }
5687
5688 return TRUE;
5689 }
5690
5691 /* Return the section that should be marked against GC for a given
5692 relocation. */
5693
5694 static asection *
5695 ppc64_elf_gc_mark_hook (asection *sec,
5696 struct bfd_link_info *info,
5697 Elf_Internal_Rela *rel,
5698 struct elf_link_hash_entry *h,
5699 Elf_Internal_Sym *sym)
5700 {
5701 asection *rsec;
5702
5703 /* Syms return NULL if we're marking .opd, so we avoid marking all
5704 function sections, as all functions are referenced in .opd. */
5705 rsec = NULL;
5706 if (get_opd_info (sec) != NULL)
5707 return rsec;
5708
5709 if (h != NULL)
5710 {
5711 enum elf_ppc64_reloc_type r_type;
5712 struct ppc_link_hash_entry *eh, *fh, *fdh;
5713
5714 r_type = ELF64_R_TYPE (rel->r_info);
5715 switch (r_type)
5716 {
5717 case R_PPC64_GNU_VTINHERIT:
5718 case R_PPC64_GNU_VTENTRY:
5719 break;
5720
5721 default:
5722 switch (h->root.type)
5723 {
5724 case bfd_link_hash_defined:
5725 case bfd_link_hash_defweak:
5726 eh = (struct ppc_link_hash_entry *) h;
5727 fdh = defined_func_desc (eh);
5728 if (fdh != NULL)
5729 eh = fdh;
5730
5731 /* Function descriptor syms cause the associated
5732 function code sym section to be marked. */
5733 fh = defined_code_entry (eh);
5734 if (fh != NULL)
5735 {
5736 /* They also mark their opd section. */
5737 eh->elf.root.u.def.section->gc_mark = 1;
5738
5739 rsec = fh->elf.root.u.def.section;
5740 }
5741 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5742 && opd_entry_value (eh->elf.root.u.def.section,
5743 eh->elf.root.u.def.value,
5744 &rsec, NULL) != (bfd_vma) -1)
5745 eh->elf.root.u.def.section->gc_mark = 1;
5746 else
5747 rsec = h->root.u.def.section;
5748 break;
5749
5750 case bfd_link_hash_common:
5751 rsec = h->root.u.c.p->section;
5752 break;
5753
5754 default:
5755 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5756 }
5757 }
5758 }
5759 else
5760 {
5761 struct _opd_sec_data *opd;
5762
5763 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5764 opd = get_opd_info (rsec);
5765 if (opd != NULL && opd->func_sec != NULL)
5766 {
5767 rsec->gc_mark = 1;
5768
5769 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5770 }
5771 }
5772
5773 return rsec;
5774 }
5775
5776 /* Update the .got, .plt. and dynamic reloc reference counts for the
5777 section being removed. */
5778
5779 static bfd_boolean
5780 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5781 asection *sec, const Elf_Internal_Rela *relocs)
5782 {
5783 struct ppc_link_hash_table *htab;
5784 Elf_Internal_Shdr *symtab_hdr;
5785 struct elf_link_hash_entry **sym_hashes;
5786 struct got_entry **local_got_ents;
5787 const Elf_Internal_Rela *rel, *relend;
5788
5789 if (info->relocatable)
5790 return TRUE;
5791
5792 if ((sec->flags & SEC_ALLOC) == 0)
5793 return TRUE;
5794
5795 elf_section_data (sec)->local_dynrel = NULL;
5796
5797 htab = ppc_hash_table (info);
5798 if (htab == NULL)
5799 return FALSE;
5800
5801 symtab_hdr = &elf_symtab_hdr (abfd);
5802 sym_hashes = elf_sym_hashes (abfd);
5803 local_got_ents = elf_local_got_ents (abfd);
5804
5805 relend = relocs + sec->reloc_count;
5806 for (rel = relocs; rel < relend; rel++)
5807 {
5808 unsigned long r_symndx;
5809 enum elf_ppc64_reloc_type r_type;
5810 struct elf_link_hash_entry *h = NULL;
5811 unsigned char tls_type = 0;
5812
5813 r_symndx = ELF64_R_SYM (rel->r_info);
5814 r_type = ELF64_R_TYPE (rel->r_info);
5815 if (r_symndx >= symtab_hdr->sh_info)
5816 {
5817 struct ppc_link_hash_entry *eh;
5818 struct ppc_dyn_relocs **pp;
5819 struct ppc_dyn_relocs *p;
5820
5821 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5822 h = elf_follow_link (h);
5823 eh = (struct ppc_link_hash_entry *) h;
5824
5825 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5826 if (p->sec == sec)
5827 {
5828 /* Everything must go for SEC. */
5829 *pp = p->next;
5830 break;
5831 }
5832 }
5833
5834 if (is_branch_reloc (r_type))
5835 {
5836 struct plt_entry **ifunc = NULL;
5837 if (h != NULL)
5838 {
5839 if (h->type == STT_GNU_IFUNC)
5840 ifunc = &h->plt.plist;
5841 }
5842 else if (local_got_ents != NULL)
5843 {
5844 struct plt_entry **local_plt = (struct plt_entry **)
5845 (local_got_ents + symtab_hdr->sh_info);
5846 unsigned char *local_got_tls_masks = (unsigned char *)
5847 (local_plt + symtab_hdr->sh_info);
5848 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5849 ifunc = local_plt + r_symndx;
5850 }
5851 if (ifunc != NULL)
5852 {
5853 struct plt_entry *ent;
5854
5855 for (ent = *ifunc; ent != NULL; ent = ent->next)
5856 if (ent->addend == rel->r_addend)
5857 break;
5858 if (ent == NULL)
5859 abort ();
5860 if (ent->plt.refcount > 0)
5861 ent->plt.refcount -= 1;
5862 continue;
5863 }
5864 }
5865
5866 switch (r_type)
5867 {
5868 case R_PPC64_GOT_TLSLD16:
5869 case R_PPC64_GOT_TLSLD16_LO:
5870 case R_PPC64_GOT_TLSLD16_HI:
5871 case R_PPC64_GOT_TLSLD16_HA:
5872 tls_type = TLS_TLS | TLS_LD;
5873 goto dogot;
5874
5875 case R_PPC64_GOT_TLSGD16:
5876 case R_PPC64_GOT_TLSGD16_LO:
5877 case R_PPC64_GOT_TLSGD16_HI:
5878 case R_PPC64_GOT_TLSGD16_HA:
5879 tls_type = TLS_TLS | TLS_GD;
5880 goto dogot;
5881
5882 case R_PPC64_GOT_TPREL16_DS:
5883 case R_PPC64_GOT_TPREL16_LO_DS:
5884 case R_PPC64_GOT_TPREL16_HI:
5885 case R_PPC64_GOT_TPREL16_HA:
5886 tls_type = TLS_TLS | TLS_TPREL;
5887 goto dogot;
5888
5889 case R_PPC64_GOT_DTPREL16_DS:
5890 case R_PPC64_GOT_DTPREL16_LO_DS:
5891 case R_PPC64_GOT_DTPREL16_HI:
5892 case R_PPC64_GOT_DTPREL16_HA:
5893 tls_type = TLS_TLS | TLS_DTPREL;
5894 goto dogot;
5895
5896 case R_PPC64_GOT16:
5897 case R_PPC64_GOT16_DS:
5898 case R_PPC64_GOT16_HA:
5899 case R_PPC64_GOT16_HI:
5900 case R_PPC64_GOT16_LO:
5901 case R_PPC64_GOT16_LO_DS:
5902 dogot:
5903 {
5904 struct got_entry *ent;
5905
5906 if (h != NULL)
5907 ent = h->got.glist;
5908 else
5909 ent = local_got_ents[r_symndx];
5910
5911 for (; ent != NULL; ent = ent->next)
5912 if (ent->addend == rel->r_addend
5913 && ent->owner == abfd
5914 && ent->tls_type == tls_type)
5915 break;
5916 if (ent == NULL)
5917 abort ();
5918 if (ent->got.refcount > 0)
5919 ent->got.refcount -= 1;
5920 }
5921 break;
5922
5923 case R_PPC64_PLT16_HA:
5924 case R_PPC64_PLT16_HI:
5925 case R_PPC64_PLT16_LO:
5926 case R_PPC64_PLT32:
5927 case R_PPC64_PLT64:
5928 case R_PPC64_REL14:
5929 case R_PPC64_REL14_BRNTAKEN:
5930 case R_PPC64_REL14_BRTAKEN:
5931 case R_PPC64_REL24:
5932 if (h != NULL)
5933 {
5934 struct plt_entry *ent;
5935
5936 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5937 if (ent->addend == rel->r_addend)
5938 break;
5939 if (ent != NULL && ent->plt.refcount > 0)
5940 ent->plt.refcount -= 1;
5941 }
5942 break;
5943
5944 default:
5945 break;
5946 }
5947 }
5948 return TRUE;
5949 }
5950
5951 /* The maximum size of .sfpr. */
5952 #define SFPR_MAX (218*4)
5953
5954 struct sfpr_def_parms
5955 {
5956 const char name[12];
5957 unsigned char lo, hi;
5958 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5959 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5960 };
5961
5962 /* Auto-generate _save*, _rest* functions in .sfpr. */
5963
5964 static bfd_boolean
5965 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5966 {
5967 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5968 unsigned int i;
5969 size_t len = strlen (parm->name);
5970 bfd_boolean writing = FALSE;
5971 char sym[16];
5972
5973 if (htab == NULL)
5974 return FALSE;
5975
5976 memcpy (sym, parm->name, len);
5977 sym[len + 2] = 0;
5978
5979 for (i = parm->lo; i <= parm->hi; i++)
5980 {
5981 struct elf_link_hash_entry *h;
5982
5983 sym[len + 0] = i / 10 + '0';
5984 sym[len + 1] = i % 10 + '0';
5985 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5986 if (h != NULL
5987 && !h->def_regular)
5988 {
5989 h->root.type = bfd_link_hash_defined;
5990 h->root.u.def.section = htab->sfpr;
5991 h->root.u.def.value = htab->sfpr->size;
5992 h->type = STT_FUNC;
5993 h->def_regular = 1;
5994 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5995 writing = TRUE;
5996 if (htab->sfpr->contents == NULL)
5997 {
5998 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5999 if (htab->sfpr->contents == NULL)
6000 return FALSE;
6001 }
6002 }
6003 if (writing)
6004 {
6005 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6006 if (i != parm->hi)
6007 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6008 else
6009 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6010 htab->sfpr->size = p - htab->sfpr->contents;
6011 }
6012 }
6013
6014 return TRUE;
6015 }
6016
6017 static bfd_byte *
6018 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6019 {
6020 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6021 return p + 4;
6022 }
6023
6024 static bfd_byte *
6025 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6026 {
6027 p = savegpr0 (abfd, p, r);
6028 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6029 p = p + 4;
6030 bfd_put_32 (abfd, BLR, p);
6031 return p + 4;
6032 }
6033
6034 static bfd_byte *
6035 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6036 {
6037 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6038 return p + 4;
6039 }
6040
6041 static bfd_byte *
6042 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6043 {
6044 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6045 p = p + 4;
6046 p = restgpr0 (abfd, p, r);
6047 bfd_put_32 (abfd, MTLR_R0, p);
6048 p = p + 4;
6049 if (r == 29)
6050 {
6051 p = restgpr0 (abfd, p, 30);
6052 p = restgpr0 (abfd, p, 31);
6053 }
6054 bfd_put_32 (abfd, BLR, p);
6055 return p + 4;
6056 }
6057
6058 static bfd_byte *
6059 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6060 {
6061 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6062 return p + 4;
6063 }
6064
6065 static bfd_byte *
6066 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6067 {
6068 p = savegpr1 (abfd, p, r);
6069 bfd_put_32 (abfd, BLR, p);
6070 return p + 4;
6071 }
6072
6073 static bfd_byte *
6074 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6075 {
6076 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6077 return p + 4;
6078 }
6079
6080 static bfd_byte *
6081 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6082 {
6083 p = restgpr1 (abfd, p, r);
6084 bfd_put_32 (abfd, BLR, p);
6085 return p + 4;
6086 }
6087
6088 static bfd_byte *
6089 savefpr (bfd *abfd, bfd_byte *p, int r)
6090 {
6091 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6092 return p + 4;
6093 }
6094
6095 static bfd_byte *
6096 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6097 {
6098 p = savefpr (abfd, p, r);
6099 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6100 p = p + 4;
6101 bfd_put_32 (abfd, BLR, p);
6102 return p + 4;
6103 }
6104
6105 static bfd_byte *
6106 restfpr (bfd *abfd, bfd_byte *p, int r)
6107 {
6108 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6109 return p + 4;
6110 }
6111
6112 static bfd_byte *
6113 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6114 {
6115 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6116 p = p + 4;
6117 p = restfpr (abfd, p, r);
6118 bfd_put_32 (abfd, MTLR_R0, p);
6119 p = p + 4;
6120 if (r == 29)
6121 {
6122 p = restfpr (abfd, p, 30);
6123 p = restfpr (abfd, p, 31);
6124 }
6125 bfd_put_32 (abfd, BLR, p);
6126 return p + 4;
6127 }
6128
6129 static bfd_byte *
6130 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6131 {
6132 p = savefpr (abfd, p, r);
6133 bfd_put_32 (abfd, BLR, p);
6134 return p + 4;
6135 }
6136
6137 static bfd_byte *
6138 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6139 {
6140 p = restfpr (abfd, p, r);
6141 bfd_put_32 (abfd, BLR, p);
6142 return p + 4;
6143 }
6144
6145 static bfd_byte *
6146 savevr (bfd *abfd, bfd_byte *p, int r)
6147 {
6148 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6149 p = p + 4;
6150 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6151 return p + 4;
6152 }
6153
6154 static bfd_byte *
6155 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6156 {
6157 p = savevr (abfd, p, r);
6158 bfd_put_32 (abfd, BLR, p);
6159 return p + 4;
6160 }
6161
6162 static bfd_byte *
6163 restvr (bfd *abfd, bfd_byte *p, int r)
6164 {
6165 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6166 p = p + 4;
6167 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6168 return p + 4;
6169 }
6170
6171 static bfd_byte *
6172 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6173 {
6174 p = restvr (abfd, p, r);
6175 bfd_put_32 (abfd, BLR, p);
6176 return p + 4;
6177 }
6178
6179 /* Called via elf_link_hash_traverse to transfer dynamic linking
6180 information on function code symbol entries to their corresponding
6181 function descriptor symbol entries. */
6182
6183 static bfd_boolean
6184 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6185 {
6186 struct bfd_link_info *info;
6187 struct ppc_link_hash_table *htab;
6188 struct plt_entry *ent;
6189 struct ppc_link_hash_entry *fh;
6190 struct ppc_link_hash_entry *fdh;
6191 bfd_boolean force_local;
6192
6193 fh = (struct ppc_link_hash_entry *) h;
6194 if (fh->elf.root.type == bfd_link_hash_indirect)
6195 return TRUE;
6196
6197 if (fh->elf.root.type == bfd_link_hash_warning)
6198 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6199
6200 info = inf;
6201 htab = ppc_hash_table (info);
6202 if (htab == NULL)
6203 return FALSE;
6204
6205 /* Resolve undefined references to dot-symbols as the value
6206 in the function descriptor, if we have one in a regular object.
6207 This is to satisfy cases like ".quad .foo". Calls to functions
6208 in dynamic objects are handled elsewhere. */
6209 if (fh->elf.root.type == bfd_link_hash_undefweak
6210 && fh->was_undefined
6211 && (fdh = defined_func_desc (fh)) != NULL
6212 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6213 && opd_entry_value (fdh->elf.root.u.def.section,
6214 fdh->elf.root.u.def.value,
6215 &fh->elf.root.u.def.section,
6216 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6217 {
6218 fh->elf.root.type = fdh->elf.root.type;
6219 fh->elf.forced_local = 1;
6220 fh->elf.def_regular = fdh->elf.def_regular;
6221 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6222 }
6223
6224 /* If this is a function code symbol, transfer dynamic linking
6225 information to the function descriptor symbol. */
6226 if (!fh->is_func)
6227 return TRUE;
6228
6229 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6230 if (ent->plt.refcount > 0)
6231 break;
6232 if (ent == NULL
6233 || fh->elf.root.root.string[0] != '.'
6234 || fh->elf.root.root.string[1] == '\0')
6235 return TRUE;
6236
6237 /* Find the corresponding function descriptor symbol. Create it
6238 as undefined if necessary. */
6239
6240 fdh = lookup_fdh (fh, htab);
6241 if (fdh == NULL
6242 && !info->executable
6243 && (fh->elf.root.type == bfd_link_hash_undefined
6244 || fh->elf.root.type == bfd_link_hash_undefweak))
6245 {
6246 fdh = make_fdh (info, fh);
6247 if (fdh == NULL)
6248 return FALSE;
6249 }
6250
6251 /* Fake function descriptors are made undefweak. If the function
6252 code symbol is strong undefined, make the fake sym the same.
6253 If the function code symbol is defined, then force the fake
6254 descriptor local; We can't support overriding of symbols in a
6255 shared library on a fake descriptor. */
6256
6257 if (fdh != NULL
6258 && fdh->fake
6259 && fdh->elf.root.type == bfd_link_hash_undefweak)
6260 {
6261 if (fh->elf.root.type == bfd_link_hash_undefined)
6262 {
6263 fdh->elf.root.type = bfd_link_hash_undefined;
6264 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6265 }
6266 else if (fh->elf.root.type == bfd_link_hash_defined
6267 || fh->elf.root.type == bfd_link_hash_defweak)
6268 {
6269 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6270 }
6271 }
6272
6273 if (fdh != NULL
6274 && !fdh->elf.forced_local
6275 && (!info->executable
6276 || fdh->elf.def_dynamic
6277 || fdh->elf.ref_dynamic
6278 || (fdh->elf.root.type == bfd_link_hash_undefweak
6279 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6280 {
6281 if (fdh->elf.dynindx == -1)
6282 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6283 return FALSE;
6284 fdh->elf.ref_regular |= fh->elf.ref_regular;
6285 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6286 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6287 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6288 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6289 {
6290 move_plt_plist (fh, fdh);
6291 fdh->elf.needs_plt = 1;
6292 }
6293 fdh->is_func_descriptor = 1;
6294 fdh->oh = fh;
6295 fh->oh = fdh;
6296 }
6297
6298 /* Now that the info is on the function descriptor, clear the
6299 function code sym info. Any function code syms for which we
6300 don't have a definition in a regular file, we force local.
6301 This prevents a shared library from exporting syms that have
6302 been imported from another library. Function code syms that
6303 are really in the library we must leave global to prevent the
6304 linker dragging in a definition from a static library. */
6305 force_local = (!fh->elf.def_regular
6306 || fdh == NULL
6307 || !fdh->elf.def_regular
6308 || fdh->elf.forced_local);
6309 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6310
6311 return TRUE;
6312 }
6313
6314 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6315 this hook to a) provide some gcc support functions, and b) transfer
6316 dynamic linking information gathered so far on function code symbol
6317 entries, to their corresponding function descriptor symbol entries. */
6318
6319 static bfd_boolean
6320 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6321 struct bfd_link_info *info)
6322 {
6323 struct ppc_link_hash_table *htab;
6324 unsigned int i;
6325 const struct sfpr_def_parms funcs[] =
6326 {
6327 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6328 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6329 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6330 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6331 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6332 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6333 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6334 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6335 { "._savef", 14, 31, savefpr, savefpr1_tail },
6336 { "._restf", 14, 31, restfpr, restfpr1_tail },
6337 { "_savevr_", 20, 31, savevr, savevr_tail },
6338 { "_restvr_", 20, 31, restvr, restvr_tail }
6339 };
6340
6341 htab = ppc_hash_table (info);
6342 if (htab == NULL)
6343 return FALSE;
6344
6345 if (htab->sfpr == NULL)
6346 /* We don't have any relocs. */
6347 return TRUE;
6348
6349 /* Provide any missing _save* and _rest* functions. */
6350 htab->sfpr->size = 0;
6351 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6352 if (!sfpr_define (info, &funcs[i]))
6353 return FALSE;
6354
6355 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6356
6357 if (htab->sfpr->size == 0)
6358 htab->sfpr->flags |= SEC_EXCLUDE;
6359
6360 return TRUE;
6361 }
6362
6363 /* Adjust a symbol defined by a dynamic object and referenced by a
6364 regular object. The current definition is in some section of the
6365 dynamic object, but we're not including those sections. We have to
6366 change the definition to something the rest of the link can
6367 understand. */
6368
6369 static bfd_boolean
6370 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6371 struct elf_link_hash_entry *h)
6372 {
6373 struct ppc_link_hash_table *htab;
6374 asection *s;
6375
6376 htab = ppc_hash_table (info);
6377 if (htab == NULL)
6378 return FALSE;
6379
6380 /* Deal with function syms. */
6381 if (h->type == STT_FUNC
6382 || h->type == STT_GNU_IFUNC
6383 || h->needs_plt)
6384 {
6385 /* Clear procedure linkage table information for any symbol that
6386 won't need a .plt entry. */
6387 struct plt_entry *ent;
6388 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6389 if (ent->plt.refcount > 0)
6390 break;
6391 if (ent == NULL
6392 || (h->type != STT_GNU_IFUNC
6393 && (SYMBOL_CALLS_LOCAL (info, h)
6394 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6395 && h->root.type == bfd_link_hash_undefweak))))
6396 {
6397 h->plt.plist = NULL;
6398 h->needs_plt = 0;
6399 }
6400 }
6401 else
6402 h->plt.plist = NULL;
6403
6404 /* If this is a weak symbol, and there is a real definition, the
6405 processor independent code will have arranged for us to see the
6406 real definition first, and we can just use the same value. */
6407 if (h->u.weakdef != NULL)
6408 {
6409 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6410 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6411 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6412 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6413 if (ELIMINATE_COPY_RELOCS)
6414 h->non_got_ref = h->u.weakdef->non_got_ref;
6415 return TRUE;
6416 }
6417
6418 /* If we are creating a shared library, we must presume that the
6419 only references to the symbol are via the global offset table.
6420 For such cases we need not do anything here; the relocations will
6421 be handled correctly by relocate_section. */
6422 if (info->shared)
6423 return TRUE;
6424
6425 /* If there are no references to this symbol that do not use the
6426 GOT, we don't need to generate a copy reloc. */
6427 if (!h->non_got_ref)
6428 return TRUE;
6429
6430 /* Don't generate a copy reloc for symbols defined in the executable. */
6431 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6432 return TRUE;
6433
6434 if (ELIMINATE_COPY_RELOCS)
6435 {
6436 struct ppc_link_hash_entry * eh;
6437 struct ppc_dyn_relocs *p;
6438
6439 eh = (struct ppc_link_hash_entry *) h;
6440 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6441 {
6442 s = p->sec->output_section;
6443 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6444 break;
6445 }
6446
6447 /* If we didn't find any dynamic relocs in read-only sections, then
6448 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6449 if (p == NULL)
6450 {
6451 h->non_got_ref = 0;
6452 return TRUE;
6453 }
6454 }
6455
6456 if (h->plt.plist != NULL)
6457 {
6458 /* We should never get here, but unfortunately there are versions
6459 of gcc out there that improperly (for this ABI) put initialized
6460 function pointers, vtable refs and suchlike in read-only
6461 sections. Allow them to proceed, but warn that this might
6462 break at runtime. */
6463 (*_bfd_error_handler)
6464 (_("copy reloc against `%s' requires lazy plt linking; "
6465 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6466 h->root.root.string);
6467 }
6468
6469 /* This is a reference to a symbol defined by a dynamic object which
6470 is not a function. */
6471
6472 if (h->size == 0)
6473 {
6474 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6475 h->root.root.string);
6476 return TRUE;
6477 }
6478
6479 /* We must allocate the symbol in our .dynbss section, which will
6480 become part of the .bss section of the executable. There will be
6481 an entry for this symbol in the .dynsym section. The dynamic
6482 object will contain position independent code, so all references
6483 from the dynamic object to this symbol will go through the global
6484 offset table. The dynamic linker will use the .dynsym entry to
6485 determine the address it must put in the global offset table, so
6486 both the dynamic object and the regular object will refer to the
6487 same memory location for the variable. */
6488
6489 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6490 to copy the initial value out of the dynamic object and into the
6491 runtime process image. We need to remember the offset into the
6492 .rela.bss section we are going to use. */
6493 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6494 {
6495 htab->relbss->size += sizeof (Elf64_External_Rela);
6496 h->needs_copy = 1;
6497 }
6498
6499 s = htab->dynbss;
6500
6501 return _bfd_elf_adjust_dynamic_copy (h, s);
6502 }
6503
6504 /* If given a function descriptor symbol, hide both the function code
6505 sym and the descriptor. */
6506 static void
6507 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6508 struct elf_link_hash_entry *h,
6509 bfd_boolean force_local)
6510 {
6511 struct ppc_link_hash_entry *eh;
6512 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6513
6514 eh = (struct ppc_link_hash_entry *) h;
6515 if (eh->is_func_descriptor)
6516 {
6517 struct ppc_link_hash_entry *fh = eh->oh;
6518
6519 if (fh == NULL)
6520 {
6521 const char *p, *q;
6522 struct ppc_link_hash_table *htab;
6523 char save;
6524
6525 /* We aren't supposed to use alloca in BFD because on
6526 systems which do not have alloca the version in libiberty
6527 calls xmalloc, which might cause the program to crash
6528 when it runs out of memory. This function doesn't have a
6529 return status, so there's no way to gracefully return an
6530 error. So cheat. We know that string[-1] can be safely
6531 accessed; It's either a string in an ELF string table,
6532 or allocated in an objalloc structure. */
6533
6534 p = eh->elf.root.root.string - 1;
6535 save = *p;
6536 *(char *) p = '.';
6537 htab = ppc_hash_table (info);
6538 if (htab == NULL)
6539 return;
6540
6541 fh = (struct ppc_link_hash_entry *)
6542 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6543 *(char *) p = save;
6544
6545 /* Unfortunately, if it so happens that the string we were
6546 looking for was allocated immediately before this string,
6547 then we overwrote the string terminator. That's the only
6548 reason the lookup should fail. */
6549 if (fh == NULL)
6550 {
6551 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6552 while (q >= eh->elf.root.root.string && *q == *p)
6553 --q, --p;
6554 if (q < eh->elf.root.root.string && *p == '.')
6555 fh = (struct ppc_link_hash_entry *)
6556 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6557 }
6558 if (fh != NULL)
6559 {
6560 eh->oh = fh;
6561 fh->oh = eh;
6562 }
6563 }
6564 if (fh != NULL)
6565 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6566 }
6567 }
6568
6569 static bfd_boolean
6570 get_sym_h (struct elf_link_hash_entry **hp,
6571 Elf_Internal_Sym **symp,
6572 asection **symsecp,
6573 unsigned char **tls_maskp,
6574 Elf_Internal_Sym **locsymsp,
6575 unsigned long r_symndx,
6576 bfd *ibfd)
6577 {
6578 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6579
6580 if (r_symndx >= symtab_hdr->sh_info)
6581 {
6582 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6583 struct elf_link_hash_entry *h;
6584
6585 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6586 h = elf_follow_link (h);
6587
6588 if (hp != NULL)
6589 *hp = h;
6590
6591 if (symp != NULL)
6592 *symp = NULL;
6593
6594 if (symsecp != NULL)
6595 {
6596 asection *symsec = NULL;
6597 if (h->root.type == bfd_link_hash_defined
6598 || h->root.type == bfd_link_hash_defweak)
6599 symsec = h->root.u.def.section;
6600 *symsecp = symsec;
6601 }
6602
6603 if (tls_maskp != NULL)
6604 {
6605 struct ppc_link_hash_entry *eh;
6606
6607 eh = (struct ppc_link_hash_entry *) h;
6608 *tls_maskp = &eh->tls_mask;
6609 }
6610 }
6611 else
6612 {
6613 Elf_Internal_Sym *sym;
6614 Elf_Internal_Sym *locsyms = *locsymsp;
6615
6616 if (locsyms == NULL)
6617 {
6618 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6619 if (locsyms == NULL)
6620 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6621 symtab_hdr->sh_info,
6622 0, NULL, NULL, NULL);
6623 if (locsyms == NULL)
6624 return FALSE;
6625 *locsymsp = locsyms;
6626 }
6627 sym = locsyms + r_symndx;
6628
6629 if (hp != NULL)
6630 *hp = NULL;
6631
6632 if (symp != NULL)
6633 *symp = sym;
6634
6635 if (symsecp != NULL)
6636 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6637
6638 if (tls_maskp != NULL)
6639 {
6640 struct got_entry **lgot_ents;
6641 unsigned char *tls_mask;
6642
6643 tls_mask = NULL;
6644 lgot_ents = elf_local_got_ents (ibfd);
6645 if (lgot_ents != NULL)
6646 {
6647 struct plt_entry **local_plt = (struct plt_entry **)
6648 (lgot_ents + symtab_hdr->sh_info);
6649 unsigned char *lgot_masks = (unsigned char *)
6650 (local_plt + symtab_hdr->sh_info);
6651 tls_mask = &lgot_masks[r_symndx];
6652 }
6653 *tls_maskp = tls_mask;
6654 }
6655 }
6656 return TRUE;
6657 }
6658
6659 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6660 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6661 type suitable for optimization, and 1 otherwise. */
6662
6663 static int
6664 get_tls_mask (unsigned char **tls_maskp,
6665 unsigned long *toc_symndx,
6666 bfd_vma *toc_addend,
6667 Elf_Internal_Sym **locsymsp,
6668 const Elf_Internal_Rela *rel,
6669 bfd *ibfd)
6670 {
6671 unsigned long r_symndx;
6672 int next_r;
6673 struct elf_link_hash_entry *h;
6674 Elf_Internal_Sym *sym;
6675 asection *sec;
6676 bfd_vma off;
6677
6678 r_symndx = ELF64_R_SYM (rel->r_info);
6679 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6680 return 0;
6681
6682 if ((*tls_maskp != NULL && **tls_maskp != 0)
6683 || sec == NULL
6684 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6685 return 1;
6686
6687 /* Look inside a TOC section too. */
6688 if (h != NULL)
6689 {
6690 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6691 off = h->root.u.def.value;
6692 }
6693 else
6694 off = sym->st_value;
6695 off += rel->r_addend;
6696 BFD_ASSERT (off % 8 == 0);
6697 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6698 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6699 if (toc_symndx != NULL)
6700 *toc_symndx = r_symndx;
6701 if (toc_addend != NULL)
6702 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6703 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6704 return 0;
6705 if ((h == NULL
6706 || ((h->root.type == bfd_link_hash_defined
6707 || h->root.type == bfd_link_hash_defweak)
6708 && !h->def_dynamic))
6709 && (next_r == -1 || next_r == -2))
6710 return 1 - next_r;
6711 return 1;
6712 }
6713
6714 /* Adjust all global syms defined in opd sections. In gcc generated
6715 code for the old ABI, these will already have been done. */
6716
6717 static bfd_boolean
6718 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6719 {
6720 struct ppc_link_hash_entry *eh;
6721 asection *sym_sec;
6722 struct _opd_sec_data *opd;
6723
6724 if (h->root.type == bfd_link_hash_indirect)
6725 return TRUE;
6726
6727 if (h->root.type == bfd_link_hash_warning)
6728 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6729
6730 if (h->root.type != bfd_link_hash_defined
6731 && h->root.type != bfd_link_hash_defweak)
6732 return TRUE;
6733
6734 eh = (struct ppc_link_hash_entry *) h;
6735 if (eh->adjust_done)
6736 return TRUE;
6737
6738 sym_sec = eh->elf.root.u.def.section;
6739 opd = get_opd_info (sym_sec);
6740 if (opd != NULL && opd->adjust != NULL)
6741 {
6742 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6743 if (adjust == -1)
6744 {
6745 /* This entry has been deleted. */
6746 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6747 if (dsec == NULL)
6748 {
6749 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6750 if (elf_discarded_section (dsec))
6751 {
6752 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6753 break;
6754 }
6755 }
6756 eh->elf.root.u.def.value = 0;
6757 eh->elf.root.u.def.section = dsec;
6758 }
6759 else
6760 eh->elf.root.u.def.value += adjust;
6761 eh->adjust_done = 1;
6762 }
6763 return TRUE;
6764 }
6765
6766 /* Handles decrementing dynamic reloc counts for the reloc specified by
6767 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6768 have already been determined. */
6769
6770 static bfd_boolean
6771 dec_dynrel_count (bfd_vma r_info,
6772 asection *sec,
6773 struct bfd_link_info *info,
6774 Elf_Internal_Sym **local_syms,
6775 struct elf_link_hash_entry *h,
6776 asection *sym_sec)
6777 {
6778 enum elf_ppc64_reloc_type r_type;
6779 struct ppc_dyn_relocs *p;
6780 struct ppc_dyn_relocs **pp;
6781
6782 /* Can this reloc be dynamic? This switch, and later tests here
6783 should be kept in sync with the code in check_relocs. */
6784 r_type = ELF64_R_TYPE (r_info);
6785 switch (r_type)
6786 {
6787 default:
6788 return TRUE;
6789
6790 case R_PPC64_TPREL16:
6791 case R_PPC64_TPREL16_LO:
6792 case R_PPC64_TPREL16_HI:
6793 case R_PPC64_TPREL16_HA:
6794 case R_PPC64_TPREL16_DS:
6795 case R_PPC64_TPREL16_LO_DS:
6796 case R_PPC64_TPREL16_HIGHER:
6797 case R_PPC64_TPREL16_HIGHERA:
6798 case R_PPC64_TPREL16_HIGHEST:
6799 case R_PPC64_TPREL16_HIGHESTA:
6800 if (!info->shared)
6801 return TRUE;
6802
6803 case R_PPC64_TPREL64:
6804 case R_PPC64_DTPMOD64:
6805 case R_PPC64_DTPREL64:
6806 case R_PPC64_ADDR64:
6807 case R_PPC64_REL30:
6808 case R_PPC64_REL32:
6809 case R_PPC64_REL64:
6810 case R_PPC64_ADDR14:
6811 case R_PPC64_ADDR14_BRNTAKEN:
6812 case R_PPC64_ADDR14_BRTAKEN:
6813 case R_PPC64_ADDR16:
6814 case R_PPC64_ADDR16_DS:
6815 case R_PPC64_ADDR16_HA:
6816 case R_PPC64_ADDR16_HI:
6817 case R_PPC64_ADDR16_HIGHER:
6818 case R_PPC64_ADDR16_HIGHERA:
6819 case R_PPC64_ADDR16_HIGHEST:
6820 case R_PPC64_ADDR16_HIGHESTA:
6821 case R_PPC64_ADDR16_LO:
6822 case R_PPC64_ADDR16_LO_DS:
6823 case R_PPC64_ADDR24:
6824 case R_PPC64_ADDR32:
6825 case R_PPC64_UADDR16:
6826 case R_PPC64_UADDR32:
6827 case R_PPC64_UADDR64:
6828 case R_PPC64_TOC:
6829 break;
6830 }
6831
6832 if (local_syms != NULL)
6833 {
6834 unsigned long r_symndx;
6835 Elf_Internal_Sym *sym;
6836 bfd *ibfd = sec->owner;
6837
6838 r_symndx = ELF64_R_SYM (r_info);
6839 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6840 return FALSE;
6841 }
6842
6843 if ((info->shared
6844 && (must_be_dyn_reloc (info, r_type)
6845 || (h != NULL
6846 && (!info->symbolic
6847 || h->root.type == bfd_link_hash_defweak
6848 || !h->def_regular))))
6849 || (ELIMINATE_COPY_RELOCS
6850 && !info->shared
6851 && h != NULL
6852 && (h->root.type == bfd_link_hash_defweak
6853 || !h->def_regular)))
6854 ;
6855 else
6856 return TRUE;
6857
6858 if (h != NULL)
6859 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6860 else
6861 {
6862 if (sym_sec != NULL)
6863 {
6864 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6865 pp = (struct ppc_dyn_relocs **) vpp;
6866 }
6867 else
6868 {
6869 void *vpp = &elf_section_data (sec)->local_dynrel;
6870 pp = (struct ppc_dyn_relocs **) vpp;
6871 }
6872
6873 /* elf_gc_sweep may have already removed all dyn relocs associated
6874 with local syms for a given section. Don't report a dynreloc
6875 miscount. */
6876 if (*pp == NULL)
6877 return TRUE;
6878 }
6879
6880 while ((p = *pp) != NULL)
6881 {
6882 if (p->sec == sec)
6883 {
6884 if (!must_be_dyn_reloc (info, r_type))
6885 p->pc_count -= 1;
6886 p->count -= 1;
6887 if (p->count == 0)
6888 *pp = p->next;
6889 return TRUE;
6890 }
6891 pp = &p->next;
6892 }
6893
6894 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6895 sec->owner, sec);
6896 bfd_set_error (bfd_error_bad_value);
6897 return FALSE;
6898 }
6899
6900 /* Remove unused Official Procedure Descriptor entries. Currently we
6901 only remove those associated with functions in discarded link-once
6902 sections, or weakly defined functions that have been overridden. It
6903 would be possible to remove many more entries for statically linked
6904 applications. */
6905
6906 bfd_boolean
6907 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6908 {
6909 bfd *ibfd;
6910 bfd_boolean some_edited = FALSE;
6911 asection *need_pad = NULL;
6912
6913 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6914 {
6915 asection *sec;
6916 Elf_Internal_Rela *relstart, *rel, *relend;
6917 Elf_Internal_Shdr *symtab_hdr;
6918 Elf_Internal_Sym *local_syms;
6919 struct elf_link_hash_entry **sym_hashes;
6920 bfd_vma offset;
6921 struct _opd_sec_data *opd;
6922 bfd_boolean need_edit, add_aux_fields;
6923 bfd_size_type cnt_16b = 0;
6924
6925 sec = bfd_get_section_by_name (ibfd, ".opd");
6926 if (sec == NULL || sec->size == 0)
6927 continue;
6928
6929 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6930 continue;
6931
6932 if (sec->output_section == bfd_abs_section_ptr)
6933 continue;
6934
6935 /* Look through the section relocs. */
6936 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6937 continue;
6938
6939 local_syms = NULL;
6940 symtab_hdr = &elf_symtab_hdr (ibfd);
6941 sym_hashes = elf_sym_hashes (ibfd);
6942
6943 /* Read the relocations. */
6944 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6945 info->keep_memory);
6946 if (relstart == NULL)
6947 return FALSE;
6948
6949 /* First run through the relocs to check they are sane, and to
6950 determine whether we need to edit this opd section. */
6951 need_edit = FALSE;
6952 need_pad = sec;
6953 offset = 0;
6954 relend = relstart + sec->reloc_count;
6955 for (rel = relstart; rel < relend; )
6956 {
6957 enum elf_ppc64_reloc_type r_type;
6958 unsigned long r_symndx;
6959 asection *sym_sec;
6960 struct elf_link_hash_entry *h;
6961 Elf_Internal_Sym *sym;
6962
6963 /* .opd contains a regular array of 16 or 24 byte entries. We're
6964 only interested in the reloc pointing to a function entry
6965 point. */
6966 if (rel->r_offset != offset
6967 || rel + 1 >= relend
6968 || (rel + 1)->r_offset != offset + 8)
6969 {
6970 /* If someone messes with .opd alignment then after a
6971 "ld -r" we might have padding in the middle of .opd.
6972 Also, there's nothing to prevent someone putting
6973 something silly in .opd with the assembler. No .opd
6974 optimization for them! */
6975 broken_opd:
6976 (*_bfd_error_handler)
6977 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6978 need_edit = FALSE;
6979 break;
6980 }
6981
6982 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6983 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6984 {
6985 (*_bfd_error_handler)
6986 (_("%B: unexpected reloc type %u in .opd section"),
6987 ibfd, r_type);
6988 need_edit = FALSE;
6989 break;
6990 }
6991
6992 r_symndx = ELF64_R_SYM (rel->r_info);
6993 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6994 r_symndx, ibfd))
6995 goto error_ret;
6996
6997 if (sym_sec == NULL || sym_sec->owner == NULL)
6998 {
6999 const char *sym_name;
7000 if (h != NULL)
7001 sym_name = h->root.root.string;
7002 else
7003 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7004 sym_sec);
7005
7006 (*_bfd_error_handler)
7007 (_("%B: undefined sym `%s' in .opd section"),
7008 ibfd, sym_name);
7009 need_edit = FALSE;
7010 break;
7011 }
7012
7013 /* opd entries are always for functions defined in the
7014 current input bfd. If the symbol isn't defined in the
7015 input bfd, then we won't be using the function in this
7016 bfd; It must be defined in a linkonce section in another
7017 bfd, or is weak. It's also possible that we are
7018 discarding the function due to a linker script /DISCARD/,
7019 which we test for via the output_section. */
7020 if (sym_sec->owner != ibfd
7021 || sym_sec->output_section == bfd_abs_section_ptr)
7022 need_edit = TRUE;
7023
7024 rel += 2;
7025 if (rel == relend
7026 || (rel + 1 == relend && rel->r_offset == offset + 16))
7027 {
7028 if (sec->size == offset + 24)
7029 {
7030 need_pad = NULL;
7031 break;
7032 }
7033 if (rel == relend && sec->size == offset + 16)
7034 {
7035 cnt_16b++;
7036 break;
7037 }
7038 goto broken_opd;
7039 }
7040
7041 if (rel->r_offset == offset + 24)
7042 offset += 24;
7043 else if (rel->r_offset != offset + 16)
7044 goto broken_opd;
7045 else if (rel + 1 < relend
7046 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7047 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7048 {
7049 offset += 16;
7050 cnt_16b++;
7051 }
7052 else if (rel + 2 < relend
7053 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7054 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7055 {
7056 offset += 24;
7057 rel += 1;
7058 }
7059 else
7060 goto broken_opd;
7061 }
7062
7063 add_aux_fields = non_overlapping && cnt_16b > 0;
7064
7065 if (need_edit || add_aux_fields)
7066 {
7067 Elf_Internal_Rela *write_rel;
7068 bfd_byte *rptr, *wptr;
7069 bfd_byte *new_contents;
7070 bfd_boolean skip;
7071 long opd_ent_size;
7072 bfd_size_type amt;
7073
7074 new_contents = NULL;
7075 amt = sec->size * sizeof (long) / 8;
7076 opd = &ppc64_elf_section_data (sec)->u.opd;
7077 opd->adjust = bfd_zalloc (sec->owner, amt);
7078 if (opd->adjust == NULL)
7079 return FALSE;
7080 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7081
7082 /* This seems a waste of time as input .opd sections are all
7083 zeros as generated by gcc, but I suppose there's no reason
7084 this will always be so. We might start putting something in
7085 the third word of .opd entries. */
7086 if ((sec->flags & SEC_IN_MEMORY) == 0)
7087 {
7088 bfd_byte *loc;
7089 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7090 {
7091 if (loc != NULL)
7092 free (loc);
7093 error_ret:
7094 if (local_syms != NULL
7095 && symtab_hdr->contents != (unsigned char *) local_syms)
7096 free (local_syms);
7097 if (elf_section_data (sec)->relocs != relstart)
7098 free (relstart);
7099 return FALSE;
7100 }
7101 sec->contents = loc;
7102 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7103 }
7104
7105 elf_section_data (sec)->relocs = relstart;
7106
7107 new_contents = sec->contents;
7108 if (add_aux_fields)
7109 {
7110 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7111 if (new_contents == NULL)
7112 return FALSE;
7113 need_pad = FALSE;
7114 }
7115 wptr = new_contents;
7116 rptr = sec->contents;
7117
7118 write_rel = relstart;
7119 skip = FALSE;
7120 offset = 0;
7121 opd_ent_size = 0;
7122 for (rel = relstart; rel < relend; rel++)
7123 {
7124 unsigned long r_symndx;
7125 asection *sym_sec;
7126 struct elf_link_hash_entry *h;
7127 Elf_Internal_Sym *sym;
7128
7129 r_symndx = ELF64_R_SYM (rel->r_info);
7130 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7131 r_symndx, ibfd))
7132 goto error_ret;
7133
7134 if (rel->r_offset == offset)
7135 {
7136 struct ppc_link_hash_entry *fdh = NULL;
7137
7138 /* See if the .opd entry is full 24 byte or
7139 16 byte (with fd_aux entry overlapped with next
7140 fd_func). */
7141 opd_ent_size = 24;
7142 if ((rel + 2 == relend && sec->size == offset + 16)
7143 || (rel + 3 < relend
7144 && rel[2].r_offset == offset + 16
7145 && rel[3].r_offset == offset + 24
7146 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7147 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7148 opd_ent_size = 16;
7149
7150 if (h != NULL
7151 && h->root.root.string[0] == '.')
7152 {
7153 struct ppc_link_hash_table *htab;
7154
7155 htab = ppc_hash_table (info);
7156 if (htab != NULL)
7157 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7158 htab);
7159 if (fdh != NULL
7160 && fdh->elf.root.type != bfd_link_hash_defined
7161 && fdh->elf.root.type != bfd_link_hash_defweak)
7162 fdh = NULL;
7163 }
7164
7165 skip = (sym_sec->owner != ibfd
7166 || sym_sec->output_section == bfd_abs_section_ptr);
7167 if (skip)
7168 {
7169 if (fdh != NULL && sym_sec->owner == ibfd)
7170 {
7171 /* Arrange for the function descriptor sym
7172 to be dropped. */
7173 fdh->elf.root.u.def.value = 0;
7174 fdh->elf.root.u.def.section = sym_sec;
7175 }
7176 opd->adjust[rel->r_offset / 8] = -1;
7177 }
7178 else
7179 {
7180 /* We'll be keeping this opd entry. */
7181
7182 if (fdh != NULL)
7183 {
7184 /* Redefine the function descriptor symbol to
7185 this location in the opd section. It is
7186 necessary to update the value here rather
7187 than using an array of adjustments as we do
7188 for local symbols, because various places
7189 in the generic ELF code use the value
7190 stored in u.def.value. */
7191 fdh->elf.root.u.def.value = wptr - new_contents;
7192 fdh->adjust_done = 1;
7193 }
7194
7195 /* Local syms are a bit tricky. We could
7196 tweak them as they can be cached, but
7197 we'd need to look through the local syms
7198 for the function descriptor sym which we
7199 don't have at the moment. So keep an
7200 array of adjustments. */
7201 opd->adjust[rel->r_offset / 8]
7202 = (wptr - new_contents) - (rptr - sec->contents);
7203
7204 if (wptr != rptr)
7205 memcpy (wptr, rptr, opd_ent_size);
7206 wptr += opd_ent_size;
7207 if (add_aux_fields && opd_ent_size == 16)
7208 {
7209 memset (wptr, '\0', 8);
7210 wptr += 8;
7211 }
7212 }
7213 rptr += opd_ent_size;
7214 offset += opd_ent_size;
7215 }
7216
7217 if (skip)
7218 {
7219 if (!NO_OPD_RELOCS
7220 && !info->relocatable
7221 && !dec_dynrel_count (rel->r_info, sec, info,
7222 NULL, h, sym_sec))
7223 goto error_ret;
7224 }
7225 else
7226 {
7227 /* We need to adjust any reloc offsets to point to the
7228 new opd entries. While we're at it, we may as well
7229 remove redundant relocs. */
7230 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7231 if (write_rel != rel)
7232 memcpy (write_rel, rel, sizeof (*rel));
7233 ++write_rel;
7234 }
7235 }
7236
7237 sec->size = wptr - new_contents;
7238 sec->reloc_count = write_rel - relstart;
7239 if (add_aux_fields)
7240 {
7241 free (sec->contents);
7242 sec->contents = new_contents;
7243 }
7244
7245 /* Fudge the header size too, as this is used later in
7246 elf_bfd_final_link if we are emitting relocs. */
7247 elf_section_data (sec)->rel_hdr.sh_size
7248 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7249 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7250 some_edited = TRUE;
7251 }
7252 else if (elf_section_data (sec)->relocs != relstart)
7253 free (relstart);
7254
7255 if (local_syms != NULL
7256 && symtab_hdr->contents != (unsigned char *) local_syms)
7257 {
7258 if (!info->keep_memory)
7259 free (local_syms);
7260 else
7261 symtab_hdr->contents = (unsigned char *) local_syms;
7262 }
7263 }
7264
7265 if (some_edited)
7266 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7267
7268 /* If we are doing a final link and the last .opd entry is just 16 byte
7269 long, add a 8 byte padding after it. */
7270 if (need_pad != NULL && !info->relocatable)
7271 {
7272 bfd_byte *p;
7273
7274 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7275 {
7276 BFD_ASSERT (need_pad->size > 0);
7277
7278 p = bfd_malloc (need_pad->size + 8);
7279 if (p == NULL)
7280 return FALSE;
7281
7282 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7283 p, 0, need_pad->size))
7284 return FALSE;
7285
7286 need_pad->contents = p;
7287 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7288 }
7289 else
7290 {
7291 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7292 if (p == NULL)
7293 return FALSE;
7294
7295 need_pad->contents = p;
7296 }
7297
7298 memset (need_pad->contents + need_pad->size, 0, 8);
7299 need_pad->size += 8;
7300 }
7301
7302 return TRUE;
7303 }
7304
7305 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7306
7307 asection *
7308 ppc64_elf_tls_setup (struct bfd_link_info *info,
7309 int no_tls_get_addr_opt,
7310 int *no_multi_toc)
7311 {
7312 struct ppc_link_hash_table *htab;
7313
7314 htab = ppc_hash_table (info);
7315 if (htab == NULL)
7316 return NULL;
7317
7318 if (*no_multi_toc)
7319 htab->do_multi_toc = 0;
7320 else if (!htab->do_multi_toc)
7321 *no_multi_toc = 1;
7322
7323 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7324 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7325 FALSE, FALSE, TRUE));
7326 /* Move dynamic linking info to the function descriptor sym. */
7327 if (htab->tls_get_addr != NULL)
7328 func_desc_adjust (&htab->tls_get_addr->elf, info);
7329 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7330 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7331 FALSE, FALSE, TRUE));
7332 if (!no_tls_get_addr_opt)
7333 {
7334 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7335
7336 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7337 FALSE, FALSE, TRUE);
7338 if (opt != NULL)
7339 func_desc_adjust (opt, info);
7340 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7341 FALSE, FALSE, TRUE);
7342 if (opt_fd != NULL
7343 && (opt_fd->root.type == bfd_link_hash_defined
7344 || opt_fd->root.type == bfd_link_hash_defweak))
7345 {
7346 /* If glibc supports an optimized __tls_get_addr call stub,
7347 signalled by the presence of __tls_get_addr_opt, and we'll
7348 be calling __tls_get_addr via a plt call stub, then
7349 make __tls_get_addr point to __tls_get_addr_opt. */
7350 tga_fd = &htab->tls_get_addr_fd->elf;
7351 if (htab->elf.dynamic_sections_created
7352 && tga_fd != NULL
7353 && (tga_fd->type == STT_FUNC
7354 || tga_fd->needs_plt)
7355 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7356 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7357 && tga_fd->root.type == bfd_link_hash_undefweak)))
7358 {
7359 struct plt_entry *ent;
7360
7361 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7362 if (ent->plt.refcount > 0)
7363 break;
7364 if (ent != NULL)
7365 {
7366 tga_fd->root.type = bfd_link_hash_indirect;
7367 tga_fd->root.u.i.link = &opt_fd->root;
7368 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7369 if (opt_fd->dynindx != -1)
7370 {
7371 /* Use __tls_get_addr_opt in dynamic relocations. */
7372 opt_fd->dynindx = -1;
7373 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7374 opt_fd->dynstr_index);
7375 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7376 return FALSE;
7377 }
7378 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7379 tga = &htab->tls_get_addr->elf;
7380 if (opt != NULL && tga != NULL)
7381 {
7382 tga->root.type = bfd_link_hash_indirect;
7383 tga->root.u.i.link = &opt->root;
7384 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7385 _bfd_elf_link_hash_hide_symbol (info, opt,
7386 tga->forced_local);
7387 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7388 }
7389 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7390 htab->tls_get_addr_fd->is_func_descriptor = 1;
7391 if (htab->tls_get_addr != NULL)
7392 {
7393 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7394 htab->tls_get_addr->is_func = 1;
7395 }
7396 }
7397 }
7398 }
7399 else
7400 no_tls_get_addr_opt = TRUE;
7401 }
7402 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7403 return _bfd_elf_tls_setup (info->output_bfd, info);
7404 }
7405
7406 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7407 HASH1 or HASH2. */
7408
7409 static bfd_boolean
7410 branch_reloc_hash_match (const bfd *ibfd,
7411 const Elf_Internal_Rela *rel,
7412 const struct ppc_link_hash_entry *hash1,
7413 const struct ppc_link_hash_entry *hash2)
7414 {
7415 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7416 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7417 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7418
7419 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7420 {
7421 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7422 struct elf_link_hash_entry *h;
7423
7424 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7425 h = elf_follow_link (h);
7426 if (h == &hash1->elf || h == &hash2->elf)
7427 return TRUE;
7428 }
7429 return FALSE;
7430 }
7431
7432 /* Run through all the TLS relocs looking for optimization
7433 opportunities. The linker has been hacked (see ppc64elf.em) to do
7434 a preliminary section layout so that we know the TLS segment
7435 offsets. We can't optimize earlier because some optimizations need
7436 to know the tp offset, and we need to optimize before allocating
7437 dynamic relocations. */
7438
7439 bfd_boolean
7440 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7441 {
7442 bfd *ibfd;
7443 asection *sec;
7444 struct ppc_link_hash_table *htab;
7445 int pass;
7446
7447 if (info->relocatable || !info->executable)
7448 return TRUE;
7449
7450 htab = ppc_hash_table (info);
7451 if (htab == NULL)
7452 return FALSE;
7453
7454 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7455 {
7456 Elf_Internal_Sym *locsyms = NULL;
7457 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7458 unsigned char *toc_ref = NULL;
7459
7460 /* Look at all the sections for this file. Make two passes over
7461 the relocs. On the first pass, mark toc entries involved
7462 with tls relocs, and check that tls relocs involved in
7463 setting up a tls_get_addr call are indeed followed by such a
7464 call. If they are not, exclude them from the optimizations
7465 done on the second pass. */
7466 for (pass = 0; pass < 2; ++pass)
7467 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7468 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7469 {
7470 Elf_Internal_Rela *relstart, *rel, *relend;
7471
7472 /* Read the relocations. */
7473 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7474 info->keep_memory);
7475 if (relstart == NULL)
7476 return FALSE;
7477
7478 relend = relstart + sec->reloc_count;
7479 for (rel = relstart; rel < relend; rel++)
7480 {
7481 enum elf_ppc64_reloc_type r_type;
7482 unsigned long r_symndx;
7483 struct elf_link_hash_entry *h;
7484 Elf_Internal_Sym *sym;
7485 asection *sym_sec;
7486 unsigned char *tls_mask;
7487 unsigned char tls_set, tls_clear, tls_type = 0;
7488 bfd_vma value;
7489 bfd_boolean ok_tprel, is_local;
7490 long toc_ref_index = 0;
7491 int expecting_tls_get_addr = 0;
7492
7493 r_symndx = ELF64_R_SYM (rel->r_info);
7494 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7495 r_symndx, ibfd))
7496 {
7497 err_free_rel:
7498 if (elf_section_data (sec)->relocs != relstart)
7499 free (relstart);
7500 if (toc_ref != NULL)
7501 free (toc_ref);
7502 if (locsyms != NULL
7503 && (elf_symtab_hdr (ibfd).contents
7504 != (unsigned char *) locsyms))
7505 free (locsyms);
7506 return FALSE;
7507 }
7508
7509 if (h != NULL)
7510 {
7511 if (h->root.type == bfd_link_hash_defined
7512 || h->root.type == bfd_link_hash_defweak)
7513 value = h->root.u.def.value;
7514 else if (h->root.type == bfd_link_hash_undefweak)
7515 value = 0;
7516 else
7517 continue;
7518 }
7519 else
7520 /* Symbols referenced by TLS relocs must be of type
7521 STT_TLS. So no need for .opd local sym adjust. */
7522 value = sym->st_value;
7523
7524 ok_tprel = FALSE;
7525 is_local = FALSE;
7526 if (h == NULL
7527 || !h->def_dynamic)
7528 {
7529 is_local = TRUE;
7530 if (h != NULL
7531 && h->root.type == bfd_link_hash_undefweak)
7532 ok_tprel = TRUE;
7533 else
7534 {
7535 value += sym_sec->output_offset;
7536 value += sym_sec->output_section->vma;
7537 value -= htab->elf.tls_sec->vma;
7538 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7539 < (bfd_vma) 1 << 32);
7540 }
7541 }
7542
7543 r_type = ELF64_R_TYPE (rel->r_info);
7544 switch (r_type)
7545 {
7546 case R_PPC64_GOT_TLSLD16:
7547 case R_PPC64_GOT_TLSLD16_LO:
7548 expecting_tls_get_addr = 1;
7549 /* Fall thru */
7550
7551 case R_PPC64_GOT_TLSLD16_HI:
7552 case R_PPC64_GOT_TLSLD16_HA:
7553 /* These relocs should never be against a symbol
7554 defined in a shared lib. Leave them alone if
7555 that turns out to be the case. */
7556 if (!is_local)
7557 continue;
7558
7559 /* LD -> LE */
7560 tls_set = 0;
7561 tls_clear = TLS_LD;
7562 tls_type = TLS_TLS | TLS_LD;
7563 break;
7564
7565 case R_PPC64_GOT_TLSGD16:
7566 case R_PPC64_GOT_TLSGD16_LO:
7567 expecting_tls_get_addr = 1;
7568 /* Fall thru */
7569
7570 case R_PPC64_GOT_TLSGD16_HI:
7571 case R_PPC64_GOT_TLSGD16_HA:
7572 if (ok_tprel)
7573 /* GD -> LE */
7574 tls_set = 0;
7575 else
7576 /* GD -> IE */
7577 tls_set = TLS_TLS | TLS_TPRELGD;
7578 tls_clear = TLS_GD;
7579 tls_type = TLS_TLS | TLS_GD;
7580 break;
7581
7582 case R_PPC64_GOT_TPREL16_DS:
7583 case R_PPC64_GOT_TPREL16_LO_DS:
7584 case R_PPC64_GOT_TPREL16_HI:
7585 case R_PPC64_GOT_TPREL16_HA:
7586 if (ok_tprel)
7587 {
7588 /* IE -> LE */
7589 tls_set = 0;
7590 tls_clear = TLS_TPREL;
7591 tls_type = TLS_TLS | TLS_TPREL;
7592 break;
7593 }
7594 continue;
7595
7596 case R_PPC64_TOC16:
7597 case R_PPC64_TOC16_LO:
7598 case R_PPC64_TLS:
7599 case R_PPC64_TLSGD:
7600 case R_PPC64_TLSLD:
7601 if (sym_sec == NULL || sym_sec != toc)
7602 continue;
7603
7604 /* Mark this toc entry as referenced by a TLS
7605 code sequence. We can do that now in the
7606 case of R_PPC64_TLS, and after checking for
7607 tls_get_addr for the TOC16 relocs. */
7608 if (toc_ref == NULL)
7609 {
7610 toc_ref = bfd_zmalloc (toc->size / 8);
7611 if (toc_ref == NULL)
7612 goto err_free_rel;
7613 }
7614 if (h != NULL)
7615 value = h->root.u.def.value;
7616 else
7617 value = sym->st_value;
7618 value += rel->r_addend;
7619 BFD_ASSERT (value < toc->size && value % 8 == 0);
7620 toc_ref_index = value / 8;
7621 if (r_type == R_PPC64_TLS
7622 || r_type == R_PPC64_TLSGD
7623 || r_type == R_PPC64_TLSLD)
7624 {
7625 toc_ref[toc_ref_index] = 1;
7626 continue;
7627 }
7628
7629 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7630 continue;
7631
7632 tls_set = 0;
7633 tls_clear = 0;
7634 expecting_tls_get_addr = 2;
7635 break;
7636
7637 case R_PPC64_TPREL64:
7638 if (pass == 0
7639 || sec != toc
7640 || toc_ref == NULL
7641 || !toc_ref[rel->r_offset / 8])
7642 continue;
7643 if (ok_tprel)
7644 {
7645 /* IE -> LE */
7646 tls_set = TLS_EXPLICIT;
7647 tls_clear = TLS_TPREL;
7648 break;
7649 }
7650 continue;
7651
7652 case R_PPC64_DTPMOD64:
7653 if (pass == 0
7654 || sec != toc
7655 || toc_ref == NULL
7656 || !toc_ref[rel->r_offset / 8])
7657 continue;
7658 if (rel + 1 < relend
7659 && (rel[1].r_info
7660 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7661 && rel[1].r_offset == rel->r_offset + 8)
7662 {
7663 if (ok_tprel)
7664 /* GD -> LE */
7665 tls_set = TLS_EXPLICIT | TLS_GD;
7666 else
7667 /* GD -> IE */
7668 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7669 tls_clear = TLS_GD;
7670 }
7671 else
7672 {
7673 if (!is_local)
7674 continue;
7675
7676 /* LD -> LE */
7677 tls_set = TLS_EXPLICIT;
7678 tls_clear = TLS_LD;
7679 }
7680 break;
7681
7682 default:
7683 continue;
7684 }
7685
7686 if (pass == 0)
7687 {
7688 if (!expecting_tls_get_addr
7689 || !sec->has_tls_get_addr_call)
7690 continue;
7691
7692 if (rel + 1 < relend
7693 && branch_reloc_hash_match (ibfd, rel + 1,
7694 htab->tls_get_addr,
7695 htab->tls_get_addr_fd))
7696 {
7697 if (expecting_tls_get_addr == 2)
7698 {
7699 /* Check for toc tls entries. */
7700 unsigned char *toc_tls;
7701 int retval;
7702
7703 retval = get_tls_mask (&toc_tls, NULL, NULL,
7704 &locsyms,
7705 rel, ibfd);
7706 if (retval == 0)
7707 goto err_free_rel;
7708 if (retval > 1 && toc_tls != NULL)
7709 toc_ref[toc_ref_index] = 1;
7710 }
7711 continue;
7712 }
7713
7714 if (expecting_tls_get_addr != 1)
7715 continue;
7716
7717 /* Uh oh, we didn't find the expected call. We
7718 could just mark this symbol to exclude it
7719 from tls optimization but it's safer to skip
7720 the entire section. */
7721 sec->has_tls_reloc = 0;
7722 break;
7723 }
7724
7725 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7726 {
7727 struct plt_entry *ent;
7728 for (ent = htab->tls_get_addr->elf.plt.plist;
7729 ent != NULL;
7730 ent = ent->next)
7731 if (ent->addend == 0)
7732 {
7733 if (ent->plt.refcount > 0)
7734 {
7735 ent->plt.refcount -= 1;
7736 expecting_tls_get_addr = 0;
7737 }
7738 break;
7739 }
7740 }
7741
7742 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7743 {
7744 struct plt_entry *ent;
7745 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7746 ent != NULL;
7747 ent = ent->next)
7748 if (ent->addend == 0)
7749 {
7750 if (ent->plt.refcount > 0)
7751 ent->plt.refcount -= 1;
7752 break;
7753 }
7754 }
7755
7756 if (tls_clear == 0)
7757 continue;
7758
7759 if ((tls_set & TLS_EXPLICIT) == 0)
7760 {
7761 struct got_entry *ent;
7762
7763 /* Adjust got entry for this reloc. */
7764 if (h != NULL)
7765 ent = h->got.glist;
7766 else
7767 ent = elf_local_got_ents (ibfd)[r_symndx];
7768
7769 for (; ent != NULL; ent = ent->next)
7770 if (ent->addend == rel->r_addend
7771 && ent->owner == ibfd
7772 && ent->tls_type == tls_type)
7773 break;
7774 if (ent == NULL)
7775 abort ();
7776
7777 if (tls_set == 0)
7778 {
7779 /* We managed to get rid of a got entry. */
7780 if (ent->got.refcount > 0)
7781 ent->got.refcount -= 1;
7782 }
7783 }
7784 else
7785 {
7786 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7787 we'll lose one or two dyn relocs. */
7788 if (!dec_dynrel_count (rel->r_info, sec, info,
7789 NULL, h, sym_sec))
7790 return FALSE;
7791
7792 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7793 {
7794 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7795 NULL, h, sym_sec))
7796 return FALSE;
7797 }
7798 }
7799
7800 *tls_mask |= tls_set;
7801 *tls_mask &= ~tls_clear;
7802 }
7803
7804 if (elf_section_data (sec)->relocs != relstart)
7805 free (relstart);
7806 }
7807
7808 if (toc_ref != NULL)
7809 free (toc_ref);
7810
7811 if (locsyms != NULL
7812 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7813 {
7814 if (!info->keep_memory)
7815 free (locsyms);
7816 else
7817 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7818 }
7819 }
7820 return TRUE;
7821 }
7822
7823 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7824 the values of any global symbols in a toc section that has been
7825 edited. Globals in toc sections should be a rarity, so this function
7826 sets a flag if any are found in toc sections other than the one just
7827 edited, so that futher hash table traversals can be avoided. */
7828
7829 struct adjust_toc_info
7830 {
7831 asection *toc;
7832 unsigned long *skip;
7833 bfd_boolean global_toc_syms;
7834 };
7835
7836 static bfd_boolean
7837 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7838 {
7839 struct ppc_link_hash_entry *eh;
7840 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7841
7842 if (h->root.type == bfd_link_hash_indirect)
7843 return TRUE;
7844
7845 if (h->root.type == bfd_link_hash_warning)
7846 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7847
7848 if (h->root.type != bfd_link_hash_defined
7849 && h->root.type != bfd_link_hash_defweak)
7850 return TRUE;
7851
7852 eh = (struct ppc_link_hash_entry *) h;
7853 if (eh->adjust_done)
7854 return TRUE;
7855
7856 if (eh->elf.root.u.def.section == toc_inf->toc)
7857 {
7858 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7859 if (skip != (unsigned long) -1)
7860 eh->elf.root.u.def.value -= skip;
7861 else
7862 {
7863 (*_bfd_error_handler)
7864 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7865 eh->elf.root.u.def.section = &bfd_abs_section;
7866 eh->elf.root.u.def.value = 0;
7867 }
7868 eh->adjust_done = 1;
7869 }
7870 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7871 toc_inf->global_toc_syms = TRUE;
7872
7873 return TRUE;
7874 }
7875
7876 /* Examine all relocs referencing .toc sections in order to remove
7877 unused .toc entries. */
7878
7879 bfd_boolean
7880 ppc64_elf_edit_toc (struct bfd_link_info *info)
7881 {
7882 bfd *ibfd;
7883 struct adjust_toc_info toc_inf;
7884
7885 toc_inf.global_toc_syms = TRUE;
7886 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7887 {
7888 asection *toc, *sec;
7889 Elf_Internal_Shdr *symtab_hdr;
7890 Elf_Internal_Sym *local_syms;
7891 struct elf_link_hash_entry **sym_hashes;
7892 Elf_Internal_Rela *relstart, *rel;
7893 unsigned long *skip, *drop;
7894 unsigned char *used;
7895 unsigned char *keep, last, some_unused;
7896
7897 toc = bfd_get_section_by_name (ibfd, ".toc");
7898 if (toc == NULL
7899 || toc->size == 0
7900 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7901 || elf_discarded_section (toc))
7902 continue;
7903
7904 local_syms = NULL;
7905 symtab_hdr = &elf_symtab_hdr (ibfd);
7906 sym_hashes = elf_sym_hashes (ibfd);
7907
7908 /* Look at sections dropped from the final link. */
7909 skip = NULL;
7910 relstart = NULL;
7911 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7912 {
7913 if (sec->reloc_count == 0
7914 || !elf_discarded_section (sec)
7915 || get_opd_info (sec)
7916 || (sec->flags & SEC_ALLOC) == 0
7917 || (sec->flags & SEC_DEBUGGING) != 0)
7918 continue;
7919
7920 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7921 if (relstart == NULL)
7922 goto error_ret;
7923
7924 /* Run through the relocs to see which toc entries might be
7925 unused. */
7926 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7927 {
7928 enum elf_ppc64_reloc_type r_type;
7929 unsigned long r_symndx;
7930 asection *sym_sec;
7931 struct elf_link_hash_entry *h;
7932 Elf_Internal_Sym *sym;
7933 bfd_vma val;
7934
7935 r_type = ELF64_R_TYPE (rel->r_info);
7936 switch (r_type)
7937 {
7938 default:
7939 continue;
7940
7941 case R_PPC64_TOC16:
7942 case R_PPC64_TOC16_LO:
7943 case R_PPC64_TOC16_HI:
7944 case R_PPC64_TOC16_HA:
7945 case R_PPC64_TOC16_DS:
7946 case R_PPC64_TOC16_LO_DS:
7947 break;
7948 }
7949
7950 r_symndx = ELF64_R_SYM (rel->r_info);
7951 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7952 r_symndx, ibfd))
7953 goto error_ret;
7954
7955 if (sym_sec != toc)
7956 continue;
7957
7958 if (h != NULL)
7959 val = h->root.u.def.value;
7960 else
7961 val = sym->st_value;
7962 val += rel->r_addend;
7963
7964 if (val >= toc->size)
7965 continue;
7966
7967 /* Anything in the toc ought to be aligned to 8 bytes.
7968 If not, don't mark as unused. */
7969 if (val & 7)
7970 continue;
7971
7972 if (skip == NULL)
7973 {
7974 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7975 if (skip == NULL)
7976 goto error_ret;
7977 }
7978
7979 skip[val >> 3] = 1;
7980 }
7981
7982 if (elf_section_data (sec)->relocs != relstart)
7983 free (relstart);
7984 }
7985
7986 if (skip == NULL)
7987 continue;
7988
7989 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7990 if (used == NULL)
7991 {
7992 error_ret:
7993 if (local_syms != NULL
7994 && symtab_hdr->contents != (unsigned char *) local_syms)
7995 free (local_syms);
7996 if (sec != NULL
7997 && relstart != NULL
7998 && elf_section_data (sec)->relocs != relstart)
7999 free (relstart);
8000 if (skip != NULL)
8001 free (skip);
8002 return FALSE;
8003 }
8004
8005 /* Now check all kept sections that might reference the toc.
8006 Check the toc itself last. */
8007 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8008 : ibfd->sections);
8009 sec != NULL;
8010 sec = (sec == toc ? NULL
8011 : sec->next == NULL ? toc
8012 : sec->next == toc && toc->next ? toc->next
8013 : sec->next))
8014 {
8015 int repeat;
8016
8017 if (sec->reloc_count == 0
8018 || elf_discarded_section (sec)
8019 || get_opd_info (sec)
8020 || (sec->flags & SEC_ALLOC) == 0
8021 || (sec->flags & SEC_DEBUGGING) != 0)
8022 continue;
8023
8024 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
8025 if (relstart == NULL)
8026 goto error_ret;
8027
8028 /* Mark toc entries referenced as used. */
8029 repeat = 0;
8030 do
8031 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8032 {
8033 enum elf_ppc64_reloc_type r_type;
8034 unsigned long r_symndx;
8035 asection *sym_sec;
8036 struct elf_link_hash_entry *h;
8037 Elf_Internal_Sym *sym;
8038 bfd_vma val;
8039
8040 r_type = ELF64_R_TYPE (rel->r_info);
8041 switch (r_type)
8042 {
8043 case R_PPC64_TOC16:
8044 case R_PPC64_TOC16_LO:
8045 case R_PPC64_TOC16_HI:
8046 case R_PPC64_TOC16_HA:
8047 case R_PPC64_TOC16_DS:
8048 case R_PPC64_TOC16_LO_DS:
8049 /* In case we're taking addresses of toc entries. */
8050 case R_PPC64_ADDR64:
8051 break;
8052
8053 default:
8054 continue;
8055 }
8056
8057 r_symndx = ELF64_R_SYM (rel->r_info);
8058 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8059 r_symndx, ibfd))
8060 {
8061 free (used);
8062 goto error_ret;
8063 }
8064
8065 if (sym_sec != toc)
8066 continue;
8067
8068 if (h != NULL)
8069 val = h->root.u.def.value;
8070 else
8071 val = sym->st_value;
8072 val += rel->r_addend;
8073
8074 if (val >= toc->size)
8075 continue;
8076
8077 /* For the toc section, we only mark as used if
8078 this entry itself isn't unused. */
8079 if (sec == toc
8080 && !used[val >> 3]
8081 && (used[rel->r_offset >> 3]
8082 || !skip[rel->r_offset >> 3]))
8083 /* Do all the relocs again, to catch reference
8084 chains. */
8085 repeat = 1;
8086
8087 used[val >> 3] = 1;
8088 }
8089 while (repeat);
8090 }
8091
8092 /* Merge the used and skip arrays. Assume that TOC
8093 doublewords not appearing as either used or unused belong
8094 to to an entry more than one doubleword in size. */
8095 for (drop = skip, keep = used, last = 0, some_unused = 0;
8096 drop < skip + (toc->size + 7) / 8;
8097 ++drop, ++keep)
8098 {
8099 if (*keep)
8100 {
8101 *drop = 0;
8102 last = 0;
8103 }
8104 else if (*drop)
8105 {
8106 some_unused = 1;
8107 last = 1;
8108 }
8109 else
8110 *drop = last;
8111 }
8112
8113 free (used);
8114
8115 if (some_unused)
8116 {
8117 bfd_byte *contents, *src;
8118 unsigned long off;
8119
8120 /* Shuffle the toc contents, and at the same time convert the
8121 skip array from booleans into offsets. */
8122 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8123 goto error_ret;
8124
8125 elf_section_data (toc)->this_hdr.contents = contents;
8126
8127 for (src = contents, off = 0, drop = skip;
8128 src < contents + toc->size;
8129 src += 8, ++drop)
8130 {
8131 if (*drop)
8132 {
8133 *drop = (unsigned long) -1;
8134 off += 8;
8135 }
8136 else if (off != 0)
8137 {
8138 *drop = off;
8139 memcpy (src - off, src, 8);
8140 }
8141 }
8142 toc->rawsize = toc->size;
8143 toc->size = src - contents - off;
8144
8145 if (toc->reloc_count != 0)
8146 {
8147 Elf_Internal_Rela *wrel;
8148 bfd_size_type sz;
8149
8150 /* Read toc relocs. */
8151 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8152 TRUE);
8153 if (relstart == NULL)
8154 goto error_ret;
8155
8156 /* Remove unused toc relocs, and adjust those we keep. */
8157 wrel = relstart;
8158 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8159 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8160 {
8161 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8162 wrel->r_info = rel->r_info;
8163 wrel->r_addend = rel->r_addend;
8164 ++wrel;
8165 }
8166 else if (!dec_dynrel_count (rel->r_info, toc, info,
8167 &local_syms, NULL, NULL))
8168 goto error_ret;
8169
8170 toc->reloc_count = wrel - relstart;
8171 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8172 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8173 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8174 }
8175
8176 /* Adjust addends for relocs against the toc section sym. */
8177 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8178 {
8179 if (sec->reloc_count == 0
8180 || elf_discarded_section (sec))
8181 continue;
8182
8183 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8184 TRUE);
8185 if (relstart == NULL)
8186 goto error_ret;
8187
8188 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8189 {
8190 enum elf_ppc64_reloc_type r_type;
8191 unsigned long r_symndx;
8192 asection *sym_sec;
8193 struct elf_link_hash_entry *h;
8194 Elf_Internal_Sym *sym;
8195
8196 r_type = ELF64_R_TYPE (rel->r_info);
8197 switch (r_type)
8198 {
8199 default:
8200 continue;
8201
8202 case R_PPC64_TOC16:
8203 case R_PPC64_TOC16_LO:
8204 case R_PPC64_TOC16_HI:
8205 case R_PPC64_TOC16_HA:
8206 case R_PPC64_TOC16_DS:
8207 case R_PPC64_TOC16_LO_DS:
8208 case R_PPC64_ADDR64:
8209 break;
8210 }
8211
8212 r_symndx = ELF64_R_SYM (rel->r_info);
8213 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8214 r_symndx, ibfd))
8215 goto error_ret;
8216
8217 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8218 continue;
8219
8220 rel->r_addend -= skip[rel->r_addend >> 3];
8221 }
8222 }
8223
8224 /* We shouldn't have local or global symbols defined in the TOC,
8225 but handle them anyway. */
8226 if (local_syms != NULL)
8227 {
8228 Elf_Internal_Sym *sym;
8229
8230 for (sym = local_syms;
8231 sym < local_syms + symtab_hdr->sh_info;
8232 ++sym)
8233 if (sym->st_value != 0
8234 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8235 {
8236 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8237 sym->st_value -= skip[sym->st_value >> 3];
8238 else
8239 {
8240 (*_bfd_error_handler)
8241 (_("%s defined in removed toc entry"),
8242 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8243 NULL));
8244 sym->st_value = 0;
8245 sym->st_shndx = SHN_ABS;
8246 }
8247 symtab_hdr->contents = (unsigned char *) local_syms;
8248 }
8249 }
8250
8251 /* Finally, adjust any global syms defined in the toc. */
8252 if (toc_inf.global_toc_syms)
8253 {
8254 toc_inf.toc = toc;
8255 toc_inf.skip = skip;
8256 toc_inf.global_toc_syms = FALSE;
8257 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8258 &toc_inf);
8259 }
8260 }
8261
8262 if (local_syms != NULL
8263 && symtab_hdr->contents != (unsigned char *) local_syms)
8264 {
8265 if (!info->keep_memory)
8266 free (local_syms);
8267 else
8268 symtab_hdr->contents = (unsigned char *) local_syms;
8269 }
8270 free (skip);
8271 }
8272
8273 return TRUE;
8274 }
8275
8276 /* Allocate space for one GOT entry. */
8277
8278 static void
8279 allocate_got (struct elf_link_hash_entry *h,
8280 struct bfd_link_info *info,
8281 struct got_entry *gent)
8282 {
8283 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8284 bfd_boolean dyn;
8285 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8286 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8287 ? 16 : 8);
8288 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8289 ? 2 : 1) * sizeof (Elf64_External_Rela);
8290 asection *got = ppc64_elf_tdata (gent->owner)->got;
8291
8292 gent->got.offset = got->size;
8293 got->size += entsize;
8294
8295 dyn = htab->elf.dynamic_sections_created;
8296 if ((info->shared
8297 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8298 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8299 || h->root.type != bfd_link_hash_undefweak))
8300 {
8301 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8302 relgot->size += rentsize;
8303 }
8304 else if (h->type == STT_GNU_IFUNC)
8305 {
8306 asection *relgot = htab->reliplt;
8307 relgot->size += rentsize;
8308 htab->got_reli_size += rentsize;
8309 }
8310 }
8311
8312 /* This function merges got entries in the same toc group. */
8313
8314 static void
8315 merge_got_entries (struct got_entry **pent)
8316 {
8317 struct got_entry *ent, *ent2;
8318
8319 for (ent = *pent; ent != NULL; ent = ent->next)
8320 if (!ent->is_indirect)
8321 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8322 if (!ent2->is_indirect
8323 && ent2->addend == ent->addend
8324 && ent2->tls_type == ent->tls_type
8325 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8326 {
8327 ent2->is_indirect = TRUE;
8328 ent2->got.ent = ent;
8329 }
8330 }
8331
8332 /* Allocate space in .plt, .got and associated reloc sections for
8333 dynamic relocs. */
8334
8335 static bfd_boolean
8336 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8337 {
8338 struct bfd_link_info *info;
8339 struct ppc_link_hash_table *htab;
8340 asection *s;
8341 struct ppc_link_hash_entry *eh;
8342 struct ppc_dyn_relocs *p;
8343 struct got_entry **pgent, *gent;
8344
8345 if (h->root.type == bfd_link_hash_indirect)
8346 return TRUE;
8347
8348 if (h->root.type == bfd_link_hash_warning)
8349 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8350
8351 info = (struct bfd_link_info *) inf;
8352 htab = ppc_hash_table (info);
8353 if (htab == NULL)
8354 return FALSE;
8355
8356 if ((htab->elf.dynamic_sections_created
8357 && h->dynindx != -1
8358 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8359 || h->type == STT_GNU_IFUNC)
8360 {
8361 struct plt_entry *pent;
8362 bfd_boolean doneone = FALSE;
8363 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8364 if (pent->plt.refcount > 0)
8365 {
8366 if (!htab->elf.dynamic_sections_created
8367 || h->dynindx == -1)
8368 {
8369 s = htab->iplt;
8370 pent->plt.offset = s->size;
8371 s->size += PLT_ENTRY_SIZE;
8372 s = htab->reliplt;
8373 }
8374 else
8375 {
8376 /* If this is the first .plt entry, make room for the special
8377 first entry. */
8378 s = htab->plt;
8379 if (s->size == 0)
8380 s->size += PLT_INITIAL_ENTRY_SIZE;
8381
8382 pent->plt.offset = s->size;
8383
8384 /* Make room for this entry. */
8385 s->size += PLT_ENTRY_SIZE;
8386
8387 /* Make room for the .glink code. */
8388 s = htab->glink;
8389 if (s->size == 0)
8390 s->size += GLINK_CALL_STUB_SIZE;
8391 /* We need bigger stubs past index 32767. */
8392 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8393 s->size += 4;
8394 s->size += 2*4;
8395
8396 /* We also need to make an entry in the .rela.plt section. */
8397 s = htab->relplt;
8398 }
8399 s->size += sizeof (Elf64_External_Rela);
8400 doneone = TRUE;
8401 }
8402 else
8403 pent->plt.offset = (bfd_vma) -1;
8404 if (!doneone)
8405 {
8406 h->plt.plist = NULL;
8407 h->needs_plt = 0;
8408 }
8409 }
8410 else
8411 {
8412 h->plt.plist = NULL;
8413 h->needs_plt = 0;
8414 }
8415
8416 eh = (struct ppc_link_hash_entry *) h;
8417 /* Run through the TLS GD got entries first if we're changing them
8418 to TPREL. */
8419 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8420 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8421 if (gent->got.refcount > 0
8422 && (gent->tls_type & TLS_GD) != 0)
8423 {
8424 /* This was a GD entry that has been converted to TPREL. If
8425 there happens to be a TPREL entry we can use that one. */
8426 struct got_entry *ent;
8427 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8428 if (ent->got.refcount > 0
8429 && (ent->tls_type & TLS_TPREL) != 0
8430 && ent->addend == gent->addend
8431 && ent->owner == gent->owner)
8432 {
8433 gent->got.refcount = 0;
8434 break;
8435 }
8436
8437 /* If not, then we'll be using our own TPREL entry. */
8438 if (gent->got.refcount != 0)
8439 gent->tls_type = TLS_TLS | TLS_TPREL;
8440 }
8441
8442 /* Remove any list entry that won't generate a word in the GOT before
8443 we call merge_got_entries. Otherwise we risk merging to empty
8444 entries. */
8445 pgent = &h->got.glist;
8446 while ((gent = *pgent) != NULL)
8447 if (gent->got.refcount > 0)
8448 {
8449 if ((gent->tls_type & TLS_LD) != 0
8450 && !h->def_dynamic)
8451 {
8452 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8453 *pgent = gent->next;
8454 }
8455 else
8456 pgent = &gent->next;
8457 }
8458 else
8459 *pgent = gent->next;
8460
8461 if (!htab->do_multi_toc)
8462 merge_got_entries (&h->got.glist);
8463
8464 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8465 if (!gent->is_indirect)
8466 {
8467 /* Make sure this symbol is output as a dynamic symbol.
8468 Undefined weak syms won't yet be marked as dynamic,
8469 nor will all TLS symbols. */
8470 if (h->dynindx == -1
8471 && !h->forced_local
8472 && h->type != STT_GNU_IFUNC
8473 && htab->elf.dynamic_sections_created)
8474 {
8475 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8476 return FALSE;
8477 }
8478
8479 if (!is_ppc64_elf (gent->owner))
8480 abort ();
8481
8482 allocate_got (h, info, gent);
8483 }
8484
8485 if (eh->dyn_relocs == NULL
8486 || (!htab->elf.dynamic_sections_created
8487 && h->type != STT_GNU_IFUNC))
8488 return TRUE;
8489
8490 /* In the shared -Bsymbolic case, discard space allocated for
8491 dynamic pc-relative relocs against symbols which turn out to be
8492 defined in regular objects. For the normal shared case, discard
8493 space for relocs that have become local due to symbol visibility
8494 changes. */
8495
8496 if (info->shared)
8497 {
8498 /* Relocs that use pc_count are those that appear on a call insn,
8499 or certain REL relocs (see must_be_dyn_reloc) that can be
8500 generated via assembly. We want calls to protected symbols to
8501 resolve directly to the function rather than going via the plt.
8502 If people want function pointer comparisons to work as expected
8503 then they should avoid writing weird assembly. */
8504 if (SYMBOL_CALLS_LOCAL (info, h))
8505 {
8506 struct ppc_dyn_relocs **pp;
8507
8508 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8509 {
8510 p->count -= p->pc_count;
8511 p->pc_count = 0;
8512 if (p->count == 0)
8513 *pp = p->next;
8514 else
8515 pp = &p->next;
8516 }
8517 }
8518
8519 /* Also discard relocs on undefined weak syms with non-default
8520 visibility. */
8521 if (eh->dyn_relocs != NULL
8522 && h->root.type == bfd_link_hash_undefweak)
8523 {
8524 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8525 eh->dyn_relocs = NULL;
8526
8527 /* Make sure this symbol is output as a dynamic symbol.
8528 Undefined weak syms won't yet be marked as dynamic. */
8529 else if (h->dynindx == -1
8530 && !h->forced_local)
8531 {
8532 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8533 return FALSE;
8534 }
8535 }
8536 }
8537 else if (h->type == STT_GNU_IFUNC)
8538 {
8539 if (!h->non_got_ref)
8540 eh->dyn_relocs = NULL;
8541 }
8542 else if (ELIMINATE_COPY_RELOCS)
8543 {
8544 /* For the non-shared case, discard space for relocs against
8545 symbols which turn out to need copy relocs or are not
8546 dynamic. */
8547
8548 if (!h->non_got_ref
8549 && !h->def_regular)
8550 {
8551 /* Make sure this symbol is output as a dynamic symbol.
8552 Undefined weak syms won't yet be marked as dynamic. */
8553 if (h->dynindx == -1
8554 && !h->forced_local)
8555 {
8556 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8557 return FALSE;
8558 }
8559
8560 /* If that succeeded, we know we'll be keeping all the
8561 relocs. */
8562 if (h->dynindx != -1)
8563 goto keep;
8564 }
8565
8566 eh->dyn_relocs = NULL;
8567
8568 keep: ;
8569 }
8570
8571 /* Finally, allocate space. */
8572 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8573 {
8574 asection *sreloc = elf_section_data (p->sec)->sreloc;
8575 if (!htab->elf.dynamic_sections_created)
8576 sreloc = htab->reliplt;
8577 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8578 }
8579
8580 return TRUE;
8581 }
8582
8583 /* Find any dynamic relocs that apply to read-only sections. */
8584
8585 static bfd_boolean
8586 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8587 {
8588 struct ppc_link_hash_entry *eh;
8589 struct ppc_dyn_relocs *p;
8590
8591 if (h->root.type == bfd_link_hash_warning)
8592 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8593
8594 eh = (struct ppc_link_hash_entry *) h;
8595 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8596 {
8597 asection *s = p->sec->output_section;
8598
8599 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8600 {
8601 struct bfd_link_info *info = inf;
8602
8603 info->flags |= DF_TEXTREL;
8604
8605 /* Not an error, just cut short the traversal. */
8606 return FALSE;
8607 }
8608 }
8609 return TRUE;
8610 }
8611
8612 /* Set the sizes of the dynamic sections. */
8613
8614 static bfd_boolean
8615 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8616 struct bfd_link_info *info)
8617 {
8618 struct ppc_link_hash_table *htab;
8619 bfd *dynobj;
8620 asection *s;
8621 bfd_boolean relocs;
8622 bfd *ibfd;
8623 struct got_entry *first_tlsld;
8624
8625 htab = ppc_hash_table (info);
8626 if (htab == NULL)
8627 return FALSE;
8628
8629 dynobj = htab->elf.dynobj;
8630 if (dynobj == NULL)
8631 abort ();
8632
8633 if (htab->elf.dynamic_sections_created)
8634 {
8635 /* Set the contents of the .interp section to the interpreter. */
8636 if (info->executable)
8637 {
8638 s = bfd_get_section_by_name (dynobj, ".interp");
8639 if (s == NULL)
8640 abort ();
8641 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8642 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8643 }
8644 }
8645
8646 /* Set up .got offsets for local syms, and space for local dynamic
8647 relocs. */
8648 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8649 {
8650 struct got_entry **lgot_ents;
8651 struct got_entry **end_lgot_ents;
8652 struct plt_entry **local_plt;
8653 struct plt_entry **end_local_plt;
8654 unsigned char *lgot_masks;
8655 bfd_size_type locsymcount;
8656 Elf_Internal_Shdr *symtab_hdr;
8657 asection *srel;
8658
8659 if (!is_ppc64_elf (ibfd))
8660 continue;
8661
8662 for (s = ibfd->sections; s != NULL; s = s->next)
8663 {
8664 struct ppc_dyn_relocs *p;
8665
8666 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8667 {
8668 if (!bfd_is_abs_section (p->sec)
8669 && bfd_is_abs_section (p->sec->output_section))
8670 {
8671 /* Input section has been discarded, either because
8672 it is a copy of a linkonce section or due to
8673 linker script /DISCARD/, so we'll be discarding
8674 the relocs too. */
8675 }
8676 else if (p->count != 0)
8677 {
8678 srel = elf_section_data (p->sec)->sreloc;
8679 if (!htab->elf.dynamic_sections_created)
8680 srel = htab->reliplt;
8681 srel->size += p->count * sizeof (Elf64_External_Rela);
8682 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8683 info->flags |= DF_TEXTREL;
8684 }
8685 }
8686 }
8687
8688 lgot_ents = elf_local_got_ents (ibfd);
8689 if (!lgot_ents)
8690 continue;
8691
8692 symtab_hdr = &elf_symtab_hdr (ibfd);
8693 locsymcount = symtab_hdr->sh_info;
8694 end_lgot_ents = lgot_ents + locsymcount;
8695 local_plt = (struct plt_entry **) end_lgot_ents;
8696 end_local_plt = local_plt + locsymcount;
8697 lgot_masks = (unsigned char *) end_local_plt;
8698 s = ppc64_elf_tdata (ibfd)->got;
8699 srel = ppc64_elf_tdata (ibfd)->relgot;
8700 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8701 {
8702 struct got_entry **pent, *ent;
8703
8704 pent = lgot_ents;
8705 while ((ent = *pent) != NULL)
8706 if (ent->got.refcount > 0)
8707 {
8708 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8709 {
8710 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8711 *pent = ent->next;
8712 }
8713 else
8714 {
8715 unsigned int num = 1;
8716 ent->got.offset = s->size;
8717 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8718 num = 2;
8719 s->size += num * 8;
8720 if (info->shared)
8721 srel->size += num * sizeof (Elf64_External_Rela);
8722 else if ((*lgot_masks & PLT_IFUNC) != 0)
8723 {
8724 htab->reliplt->size
8725 += num * sizeof (Elf64_External_Rela);
8726 htab->got_reli_size
8727 += num * sizeof (Elf64_External_Rela);
8728 }
8729 pent = &ent->next;
8730 }
8731 }
8732 else
8733 *pent = ent->next;
8734 }
8735
8736 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8737 for (; local_plt < end_local_plt; ++local_plt)
8738 {
8739 struct plt_entry *ent;
8740
8741 for (ent = *local_plt; ent != NULL; ent = ent->next)
8742 if (ent->plt.refcount > 0)
8743 {
8744 s = htab->iplt;
8745 ent->plt.offset = s->size;
8746 s->size += PLT_ENTRY_SIZE;
8747
8748 htab->reliplt->size += sizeof (Elf64_External_Rela);
8749 }
8750 else
8751 ent->plt.offset = (bfd_vma) -1;
8752 }
8753 }
8754
8755 /* Allocate global sym .plt and .got entries, and space for global
8756 sym dynamic relocs. */
8757 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8758
8759 first_tlsld = NULL;
8760 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8761 {
8762 struct got_entry *ent;
8763
8764 if (!is_ppc64_elf (ibfd))
8765 continue;
8766
8767 ent = ppc64_tlsld_got (ibfd);
8768 if (ent->got.refcount > 0)
8769 {
8770 if (!htab->do_multi_toc && first_tlsld != NULL)
8771 {
8772 ent->is_indirect = TRUE;
8773 ent->got.ent = first_tlsld;
8774 }
8775 else
8776 {
8777 if (first_tlsld == NULL)
8778 first_tlsld = ent;
8779 s = ppc64_elf_tdata (ibfd)->got;
8780 ent->got.offset = s->size;
8781 ent->owner = ibfd;
8782 s->size += 16;
8783 if (info->shared)
8784 {
8785 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8786 srel->size += sizeof (Elf64_External_Rela);
8787 }
8788 }
8789 }
8790 else
8791 ent->got.offset = (bfd_vma) -1;
8792 }
8793
8794 /* We now have determined the sizes of the various dynamic sections.
8795 Allocate memory for them. */
8796 relocs = FALSE;
8797 for (s = dynobj->sections; s != NULL; s = s->next)
8798 {
8799 if ((s->flags & SEC_LINKER_CREATED) == 0)
8800 continue;
8801
8802 if (s == htab->brlt || s == htab->relbrlt)
8803 /* These haven't been allocated yet; don't strip. */
8804 continue;
8805 else if (s == htab->got
8806 || s == htab->plt
8807 || s == htab->iplt
8808 || s == htab->glink
8809 || s == htab->dynbss)
8810 {
8811 /* Strip this section if we don't need it; see the
8812 comment below. */
8813 }
8814 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8815 {
8816 if (s->size != 0)
8817 {
8818 if (s != htab->relplt)
8819 relocs = TRUE;
8820
8821 /* We use the reloc_count field as a counter if we need
8822 to copy relocs into the output file. */
8823 s->reloc_count = 0;
8824 }
8825 }
8826 else
8827 {
8828 /* It's not one of our sections, so don't allocate space. */
8829 continue;
8830 }
8831
8832 if (s->size == 0)
8833 {
8834 /* If we don't need this section, strip it from the
8835 output file. This is mostly to handle .rela.bss and
8836 .rela.plt. We must create both sections in
8837 create_dynamic_sections, because they must be created
8838 before the linker maps input sections to output
8839 sections. The linker does that before
8840 adjust_dynamic_symbol is called, and it is that
8841 function which decides whether anything needs to go
8842 into these sections. */
8843 s->flags |= SEC_EXCLUDE;
8844 continue;
8845 }
8846
8847 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8848 continue;
8849
8850 /* Allocate memory for the section contents. We use bfd_zalloc
8851 here in case unused entries are not reclaimed before the
8852 section's contents are written out. This should not happen,
8853 but this way if it does we get a R_PPC64_NONE reloc in .rela
8854 sections instead of garbage.
8855 We also rely on the section contents being zero when writing
8856 the GOT. */
8857 s->contents = bfd_zalloc (dynobj, s->size);
8858 if (s->contents == NULL)
8859 return FALSE;
8860 }
8861
8862 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8863 {
8864 if (!is_ppc64_elf (ibfd))
8865 continue;
8866
8867 s = ppc64_elf_tdata (ibfd)->got;
8868 if (s != NULL && s != htab->got)
8869 {
8870 if (s->size == 0)
8871 s->flags |= SEC_EXCLUDE;
8872 else
8873 {
8874 s->contents = bfd_zalloc (ibfd, s->size);
8875 if (s->contents == NULL)
8876 return FALSE;
8877 }
8878 }
8879 s = ppc64_elf_tdata (ibfd)->relgot;
8880 if (s != NULL)
8881 {
8882 if (s->size == 0)
8883 s->flags |= SEC_EXCLUDE;
8884 else
8885 {
8886 s->contents = bfd_zalloc (ibfd, s->size);
8887 if (s->contents == NULL)
8888 return FALSE;
8889 relocs = TRUE;
8890 s->reloc_count = 0;
8891 }
8892 }
8893 }
8894
8895 if (htab->elf.dynamic_sections_created)
8896 {
8897 /* Add some entries to the .dynamic section. We fill in the
8898 values later, in ppc64_elf_finish_dynamic_sections, but we
8899 must add the entries now so that we get the correct size for
8900 the .dynamic section. The DT_DEBUG entry is filled in by the
8901 dynamic linker and used by the debugger. */
8902 #define add_dynamic_entry(TAG, VAL) \
8903 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8904
8905 if (info->executable)
8906 {
8907 if (!add_dynamic_entry (DT_DEBUG, 0))
8908 return FALSE;
8909 }
8910
8911 if (htab->plt != NULL && htab->plt->size != 0)
8912 {
8913 if (!add_dynamic_entry (DT_PLTGOT, 0)
8914 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8915 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8916 || !add_dynamic_entry (DT_JMPREL, 0)
8917 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8918 return FALSE;
8919 }
8920
8921 if (NO_OPD_RELOCS)
8922 {
8923 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8924 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8925 return FALSE;
8926 }
8927
8928 if (!htab->no_tls_get_addr_opt
8929 && htab->tls_get_addr_fd != NULL
8930 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8931 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8932 return FALSE;
8933
8934 if (relocs)
8935 {
8936 if (!add_dynamic_entry (DT_RELA, 0)
8937 || !add_dynamic_entry (DT_RELASZ, 0)
8938 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8939 return FALSE;
8940
8941 /* If any dynamic relocs apply to a read-only section,
8942 then we need a DT_TEXTREL entry. */
8943 if ((info->flags & DF_TEXTREL) == 0)
8944 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8945
8946 if ((info->flags & DF_TEXTREL) != 0)
8947 {
8948 if (!add_dynamic_entry (DT_TEXTREL, 0))
8949 return FALSE;
8950 }
8951 }
8952 }
8953 #undef add_dynamic_entry
8954
8955 return TRUE;
8956 }
8957
8958 /* Determine the type of stub needed, if any, for a call. */
8959
8960 static inline enum ppc_stub_type
8961 ppc_type_of_stub (asection *input_sec,
8962 const Elf_Internal_Rela *rel,
8963 struct ppc_link_hash_entry **hash,
8964 struct plt_entry **plt_ent,
8965 bfd_vma destination)
8966 {
8967 struct ppc_link_hash_entry *h = *hash;
8968 bfd_vma location;
8969 bfd_vma branch_offset;
8970 bfd_vma max_branch_offset;
8971 enum elf_ppc64_reloc_type r_type;
8972
8973 if (h != NULL)
8974 {
8975 struct plt_entry *ent;
8976 struct ppc_link_hash_entry *fdh = h;
8977 if (h->oh != NULL
8978 && h->oh->is_func_descriptor)
8979 fdh = ppc_follow_link (h->oh);
8980
8981 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8982 if (ent->addend == rel->r_addend
8983 && ent->plt.offset != (bfd_vma) -1)
8984 {
8985 *hash = fdh;
8986 *plt_ent = ent;
8987 return ppc_stub_plt_call;
8988 }
8989
8990 /* Here, we know we don't have a plt entry. If we don't have a
8991 either a defined function descriptor or a defined entry symbol
8992 in a regular object file, then it is pointless trying to make
8993 any other type of stub. */
8994 if (!((fdh->elf.root.type == bfd_link_hash_defined
8995 || fdh->elf.root.type == bfd_link_hash_defweak)
8996 && fdh->elf.root.u.def.section->output_section != NULL)
8997 && !((h->elf.root.type == bfd_link_hash_defined
8998 || h->elf.root.type == bfd_link_hash_defweak)
8999 && h->elf.root.u.def.section->output_section != NULL))
9000 return ppc_stub_none;
9001 }
9002 else if (elf_local_got_ents (input_sec->owner) != NULL)
9003 {
9004 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9005 struct plt_entry **local_plt = (struct plt_entry **)
9006 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9007 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9008
9009 if (local_plt[r_symndx] != NULL)
9010 {
9011 struct plt_entry *ent;
9012
9013 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9014 if (ent->addend == rel->r_addend
9015 && ent->plt.offset != (bfd_vma) -1)
9016 {
9017 *plt_ent = ent;
9018 return ppc_stub_plt_call;
9019 }
9020 }
9021 }
9022
9023 /* Determine where the call point is. */
9024 location = (input_sec->output_offset
9025 + input_sec->output_section->vma
9026 + rel->r_offset);
9027
9028 branch_offset = destination - location;
9029 r_type = ELF64_R_TYPE (rel->r_info);
9030
9031 /* Determine if a long branch stub is needed. */
9032 max_branch_offset = 1 << 25;
9033 if (r_type != R_PPC64_REL24)
9034 max_branch_offset = 1 << 15;
9035
9036 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9037 /* We need a stub. Figure out whether a long_branch or plt_branch
9038 is needed later. */
9039 return ppc_stub_long_branch;
9040
9041 return ppc_stub_none;
9042 }
9043
9044 /* Build a .plt call stub. */
9045
9046 static inline bfd_byte *
9047 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9048 {
9049 #define PPC_LO(v) ((v) & 0xffff)
9050 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9051 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9052
9053 if (PPC_HA (offset) != 0)
9054 {
9055 if (r != NULL)
9056 {
9057 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9058 r[1].r_offset = r[0].r_offset + 8;
9059 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9060 r[1].r_addend = r[0].r_addend;
9061 if (PPC_HA (offset + 16) != PPC_HA (offset))
9062 {
9063 r[2].r_offset = r[1].r_offset + 4;
9064 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9065 r[2].r_addend = r[0].r_addend;
9066 }
9067 else
9068 {
9069 r[2].r_offset = r[1].r_offset + 8;
9070 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9071 r[2].r_addend = r[0].r_addend + 8;
9072 r[3].r_offset = r[2].r_offset + 4;
9073 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9074 r[3].r_addend = r[0].r_addend + 16;
9075 }
9076 }
9077 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9078 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9079 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9080 if (PPC_HA (offset + 16) != PPC_HA (offset))
9081 {
9082 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9083 offset = 0;
9084 }
9085 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9086 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9087 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9088 bfd_put_32 (obfd, BCTR, p), p += 4;
9089 }
9090 else
9091 {
9092 if (r != NULL)
9093 {
9094 r[0].r_offset += 4;
9095 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9096 if (PPC_HA (offset + 16) != PPC_HA (offset))
9097 {
9098 r[1].r_offset = r[0].r_offset + 4;
9099 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9100 r[1].r_addend = r[0].r_addend;
9101 }
9102 else
9103 {
9104 r[1].r_offset = r[0].r_offset + 8;
9105 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9106 r[1].r_addend = r[0].r_addend + 16;
9107 r[2].r_offset = r[1].r_offset + 4;
9108 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9109 r[2].r_addend = r[0].r_addend + 8;
9110 }
9111 }
9112 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9113 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9114 if (PPC_HA (offset + 16) != PPC_HA (offset))
9115 {
9116 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9117 offset = 0;
9118 }
9119 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9120 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9121 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9122 bfd_put_32 (obfd, BCTR, p), p += 4;
9123 }
9124 return p;
9125 }
9126
9127 /* Build a special .plt call stub for __tls_get_addr. */
9128
9129 #define LD_R11_0R3 0xe9630000
9130 #define LD_R12_0R3 0xe9830000
9131 #define MR_R0_R3 0x7c601b78
9132 #define CMPDI_R11_0 0x2c2b0000
9133 #define ADD_R3_R12_R13 0x7c6c6a14
9134 #define BEQLR 0x4d820020
9135 #define MR_R3_R0 0x7c030378
9136 #define MFLR_R11 0x7d6802a6
9137 #define STD_R11_0R1 0xf9610000
9138 #define BCTRL 0x4e800421
9139 #define LD_R11_0R1 0xe9610000
9140 #define LD_R2_0R1 0xe8410000
9141 #define MTLR_R11 0x7d6803a6
9142
9143 static inline bfd_byte *
9144 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9145 Elf_Internal_Rela *r)
9146 {
9147 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9148 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9149 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9150 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9151 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9152 bfd_put_32 (obfd, BEQLR, p), p += 4;
9153 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9154 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9155 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9156
9157 if (r != NULL)
9158 r[0].r_offset += 9 * 4;
9159 p = build_plt_stub (obfd, p, offset, r);
9160 bfd_put_32 (obfd, BCTRL, p - 4);
9161
9162 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9163 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9164 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9165 bfd_put_32 (obfd, BLR, p), p += 4;
9166
9167 return p;
9168 }
9169
9170 static Elf_Internal_Rela *
9171 get_relocs (asection *sec, int count)
9172 {
9173 Elf_Internal_Rela *relocs;
9174 struct bfd_elf_section_data *elfsec_data;
9175
9176 elfsec_data = elf_section_data (sec);
9177 relocs = elfsec_data->relocs;
9178 if (relocs == NULL)
9179 {
9180 bfd_size_type relsize;
9181 relsize = sec->reloc_count * sizeof (*relocs);
9182 relocs = bfd_alloc (sec->owner, relsize);
9183 if (relocs == NULL)
9184 return NULL;
9185 elfsec_data->relocs = relocs;
9186 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9187 * sizeof (Elf64_External_Rela));
9188 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9189 sec->reloc_count = 0;
9190 }
9191 relocs += sec->reloc_count;
9192 sec->reloc_count += count;
9193 return relocs;
9194 }
9195
9196 static bfd_boolean
9197 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9198 {
9199 struct ppc_stub_hash_entry *stub_entry;
9200 struct ppc_branch_hash_entry *br_entry;
9201 struct bfd_link_info *info;
9202 struct ppc_link_hash_table *htab;
9203 bfd_byte *loc;
9204 bfd_byte *p;
9205 bfd_vma dest, off;
9206 int size;
9207 Elf_Internal_Rela *r;
9208 asection *plt;
9209
9210 /* Massage our args to the form they really have. */
9211 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9212 info = in_arg;
9213
9214 htab = ppc_hash_table (info);
9215 if (htab == NULL)
9216 return FALSE;
9217
9218 /* Make a note of the offset within the stubs for this entry. */
9219 stub_entry->stub_offset = stub_entry->stub_sec->size;
9220 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9221
9222 htab->stub_count[stub_entry->stub_type - 1] += 1;
9223 switch (stub_entry->stub_type)
9224 {
9225 case ppc_stub_long_branch:
9226 case ppc_stub_long_branch_r2off:
9227 /* Branches are relative. This is where we are going to. */
9228 off = dest = (stub_entry->target_value
9229 + stub_entry->target_section->output_offset
9230 + stub_entry->target_section->output_section->vma);
9231
9232 /* And this is where we are coming from. */
9233 off -= (stub_entry->stub_offset
9234 + stub_entry->stub_sec->output_offset
9235 + stub_entry->stub_sec->output_section->vma);
9236
9237 size = 4;
9238 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
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 = 12;
9247 if (PPC_HA (r2off) != 0)
9248 {
9249 size = 16;
9250 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9251 loc += 4;
9252 }
9253 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9254 loc += 4;
9255 off -= size - 4;
9256 }
9257 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9258
9259 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9260 {
9261 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9262 stub_entry->root.string);
9263 htab->stub_error = TRUE;
9264 return FALSE;
9265 }
9266
9267 if (info->emitrelocations)
9268 {
9269 r = get_relocs (stub_entry->stub_sec, 1);
9270 if (r == NULL)
9271 return FALSE;
9272 r->r_offset = loc - stub_entry->stub_sec->contents;
9273 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9274 r->r_addend = dest;
9275 if (stub_entry->h != NULL)
9276 {
9277 struct elf_link_hash_entry **hashes;
9278 unsigned long symndx;
9279 struct ppc_link_hash_entry *h;
9280
9281 hashes = elf_sym_hashes (htab->stub_bfd);
9282 if (hashes == NULL)
9283 {
9284 bfd_size_type hsize;
9285
9286 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9287 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9288 if (hashes == NULL)
9289 return FALSE;
9290 elf_sym_hashes (htab->stub_bfd) = hashes;
9291 htab->stub_globals = 1;
9292 }
9293 symndx = htab->stub_globals++;
9294 h = stub_entry->h;
9295 hashes[symndx] = &h->elf;
9296 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9297 if (h->oh != NULL && h->oh->is_func)
9298 h = ppc_follow_link (h->oh);
9299 if (h->elf.root.u.def.section != stub_entry->target_section)
9300 /* H is an opd symbol. The addend must be zero. */
9301 r->r_addend = 0;
9302 else
9303 {
9304 off = (h->elf.root.u.def.value
9305 + h->elf.root.u.def.section->output_offset
9306 + h->elf.root.u.def.section->output_section->vma);
9307 r->r_addend -= off;
9308 }
9309 }
9310 }
9311 break;
9312
9313 case ppc_stub_plt_branch:
9314 case ppc_stub_plt_branch_r2off:
9315 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9316 stub_entry->root.string + 9,
9317 FALSE, FALSE);
9318 if (br_entry == NULL)
9319 {
9320 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9321 stub_entry->root.string);
9322 htab->stub_error = TRUE;
9323 return FALSE;
9324 }
9325
9326 dest = (stub_entry->target_value
9327 + stub_entry->target_section->output_offset
9328 + stub_entry->target_section->output_section->vma);
9329
9330 bfd_put_64 (htab->brlt->owner, dest,
9331 htab->brlt->contents + br_entry->offset);
9332
9333 if (br_entry->iter == htab->stub_iteration)
9334 {
9335 br_entry->iter = 0;
9336
9337 if (htab->relbrlt != NULL)
9338 {
9339 /* Create a reloc for the branch lookup table entry. */
9340 Elf_Internal_Rela rela;
9341 bfd_byte *rl;
9342
9343 rela.r_offset = (br_entry->offset
9344 + htab->brlt->output_offset
9345 + htab->brlt->output_section->vma);
9346 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9347 rela.r_addend = dest;
9348
9349 rl = htab->relbrlt->contents;
9350 rl += (htab->relbrlt->reloc_count++
9351 * sizeof (Elf64_External_Rela));
9352 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9353 }
9354 else if (info->emitrelocations)
9355 {
9356 r = get_relocs (htab->brlt, 1);
9357 if (r == NULL)
9358 return FALSE;
9359 /* brlt, being SEC_LINKER_CREATED does not go through the
9360 normal reloc processing. Symbols and offsets are not
9361 translated from input file to output file form, so
9362 set up the offset per the output file. */
9363 r->r_offset = (br_entry->offset
9364 + htab->brlt->output_offset
9365 + htab->brlt->output_section->vma);
9366 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9367 r->r_addend = dest;
9368 }
9369 }
9370
9371 dest = (br_entry->offset
9372 + htab->brlt->output_offset
9373 + htab->brlt->output_section->vma);
9374
9375 off = (dest
9376 - elf_gp (htab->brlt->output_section->owner)
9377 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9378
9379 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9380 {
9381 (*_bfd_error_handler)
9382 (_("linkage table error against `%s'"),
9383 stub_entry->root.string);
9384 bfd_set_error (bfd_error_bad_value);
9385 htab->stub_error = TRUE;
9386 return FALSE;
9387 }
9388
9389 if (info->emitrelocations)
9390 {
9391 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9392 if (r == NULL)
9393 return FALSE;
9394 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9395 if (bfd_big_endian (info->output_bfd))
9396 r[0].r_offset += 2;
9397 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9398 r[0].r_offset += 4;
9399 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9400 r[0].r_addend = dest;
9401 if (PPC_HA (off) != 0)
9402 {
9403 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9404 r[1].r_offset = r[0].r_offset + 4;
9405 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9406 r[1].r_addend = r[0].r_addend;
9407 }
9408 }
9409
9410 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9411 {
9412 if (PPC_HA (off) != 0)
9413 {
9414 size = 16;
9415 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9416 loc += 4;
9417 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9418 }
9419 else
9420 {
9421 size = 12;
9422 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9423 }
9424 }
9425 else
9426 {
9427 bfd_vma r2off;
9428
9429 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9430 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9431 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9432 loc += 4;
9433 size = 20;
9434 if (PPC_HA (off) != 0)
9435 {
9436 size += 4;
9437 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9438 loc += 4;
9439 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9440 loc += 4;
9441 }
9442 else
9443 {
9444 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9445 loc += 4;
9446 }
9447
9448 if (PPC_HA (r2off) != 0)
9449 {
9450 size += 4;
9451 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9452 loc += 4;
9453 }
9454 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9455 }
9456 loc += 4;
9457 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9458 loc += 4;
9459 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9460 break;
9461
9462 case ppc_stub_plt_call:
9463 if (stub_entry->h != NULL
9464 && stub_entry->h->is_func_descriptor
9465 && stub_entry->h->oh != NULL)
9466 {
9467 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9468
9469 /* If the old-ABI "dot-symbol" is undefined make it weak so
9470 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9471 FIXME: We used to define the symbol on one of the call
9472 stubs instead, which is why we test symbol section id
9473 against htab->top_id in various places. Likely all
9474 these checks could now disappear. */
9475 if (fh->elf.root.type == bfd_link_hash_undefined)
9476 fh->elf.root.type = bfd_link_hash_undefweak;
9477 }
9478
9479 /* Now build the stub. */
9480 dest = stub_entry->plt_ent->plt.offset & ~1;
9481 if (dest >= (bfd_vma) -2)
9482 abort ();
9483
9484 plt = htab->plt;
9485 if (!htab->elf.dynamic_sections_created
9486 || stub_entry->h == NULL
9487 || stub_entry->h->elf.dynindx == -1)
9488 plt = htab->iplt;
9489
9490 dest += plt->output_offset + plt->output_section->vma;
9491
9492 if (stub_entry->h == NULL
9493 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9494 {
9495 Elf_Internal_Rela rela;
9496 bfd_byte *rl;
9497
9498 rela.r_offset = dest;
9499 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9500 rela.r_addend = (stub_entry->target_value
9501 + stub_entry->target_section->output_offset
9502 + stub_entry->target_section->output_section->vma);
9503
9504 rl = (htab->reliplt->contents
9505 + (htab->reliplt->reloc_count++
9506 * sizeof (Elf64_External_Rela)));
9507 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9508 stub_entry->plt_ent->plt.offset |= 1;
9509 }
9510
9511 off = (dest
9512 - elf_gp (plt->output_section->owner)
9513 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9514
9515 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9516 {
9517 (*_bfd_error_handler)
9518 (_("linkage table error against `%s'"),
9519 stub_entry->h != NULL
9520 ? stub_entry->h->elf.root.root.string
9521 : "<local sym>");
9522 bfd_set_error (bfd_error_bad_value);
9523 htab->stub_error = TRUE;
9524 return FALSE;
9525 }
9526
9527 r = NULL;
9528 if (info->emitrelocations)
9529 {
9530 r = get_relocs (stub_entry->stub_sec,
9531 (2 + (PPC_HA (off) != 0)
9532 + (PPC_HA (off + 16) == PPC_HA (off))));
9533 if (r == NULL)
9534 return FALSE;
9535 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9536 if (bfd_big_endian (info->output_bfd))
9537 r[0].r_offset += 2;
9538 r[0].r_addend = dest;
9539 }
9540 if (stub_entry->h != NULL
9541 && (stub_entry->h == htab->tls_get_addr_fd
9542 || stub_entry->h == htab->tls_get_addr)
9543 && !htab->no_tls_get_addr_opt)
9544 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9545 else
9546 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9547 size = p - loc;
9548 break;
9549
9550 default:
9551 BFD_FAIL ();
9552 return FALSE;
9553 }
9554
9555 stub_entry->stub_sec->size += size;
9556
9557 if (htab->emit_stub_syms)
9558 {
9559 struct elf_link_hash_entry *h;
9560 size_t len1, len2;
9561 char *name;
9562 const char *const stub_str[] = { "long_branch",
9563 "long_branch_r2off",
9564 "plt_branch",
9565 "plt_branch_r2off",
9566 "plt_call" };
9567
9568 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9569 len2 = strlen (stub_entry->root.string);
9570 name = bfd_malloc (len1 + len2 + 2);
9571 if (name == NULL)
9572 return FALSE;
9573 memcpy (name, stub_entry->root.string, 9);
9574 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9575 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9576 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9577 if (h == NULL)
9578 return FALSE;
9579 if (h->root.type == bfd_link_hash_new)
9580 {
9581 h->root.type = bfd_link_hash_defined;
9582 h->root.u.def.section = stub_entry->stub_sec;
9583 h->root.u.def.value = stub_entry->stub_offset;
9584 h->ref_regular = 1;
9585 h->def_regular = 1;
9586 h->ref_regular_nonweak = 1;
9587 h->forced_local = 1;
9588 h->non_elf = 0;
9589 }
9590 }
9591
9592 return TRUE;
9593 }
9594
9595 /* As above, but don't actually build the stub. Just bump offset so
9596 we know stub section sizes, and select plt_branch stubs where
9597 long_branch stubs won't do. */
9598
9599 static bfd_boolean
9600 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9601 {
9602 struct ppc_stub_hash_entry *stub_entry;
9603 struct bfd_link_info *info;
9604 struct ppc_link_hash_table *htab;
9605 bfd_vma off;
9606 int size;
9607
9608 /* Massage our args to the form they really have. */
9609 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9610 info = in_arg;
9611
9612 htab = ppc_hash_table (info);
9613 if (htab == NULL)
9614 return FALSE;
9615
9616 if (stub_entry->stub_type == ppc_stub_plt_call)
9617 {
9618 asection *plt;
9619 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9620 if (off >= (bfd_vma) -2)
9621 abort ();
9622 plt = htab->plt;
9623 if (!htab->elf.dynamic_sections_created
9624 || stub_entry->h == NULL
9625 || stub_entry->h->elf.dynindx == -1)
9626 plt = htab->iplt;
9627 off += (plt->output_offset
9628 + plt->output_section->vma
9629 - elf_gp (plt->output_section->owner)
9630 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9631
9632 size = PLT_CALL_STUB_SIZE;
9633 if (PPC_HA (off) == 0)
9634 size -= 4;
9635 if (PPC_HA (off + 16) != PPC_HA (off))
9636 size += 4;
9637 if (stub_entry->h != NULL
9638 && (stub_entry->h == htab->tls_get_addr_fd
9639 || stub_entry->h == htab->tls_get_addr)
9640 && !htab->no_tls_get_addr_opt)
9641 size += 13 * 4;
9642 if (info->emitrelocations)
9643 {
9644 stub_entry->stub_sec->reloc_count
9645 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9646 stub_entry->stub_sec->flags |= SEC_RELOC;
9647 }
9648 }
9649 else
9650 {
9651 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9652 variants. */
9653 bfd_vma r2off = 0;
9654
9655 off = (stub_entry->target_value
9656 + stub_entry->target_section->output_offset
9657 + stub_entry->target_section->output_section->vma);
9658 off -= (stub_entry->stub_sec->size
9659 + stub_entry->stub_sec->output_offset
9660 + stub_entry->stub_sec->output_section->vma);
9661
9662 /* Reset the stub type from the plt variant in case we now
9663 can reach with a shorter stub. */
9664 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9665 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9666
9667 size = 4;
9668 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9669 {
9670 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9671 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9672 size = 12;
9673 if (PPC_HA (r2off) != 0)
9674 size = 16;
9675 off -= size - 4;
9676 }
9677
9678 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9679 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9680 {
9681 struct ppc_branch_hash_entry *br_entry;
9682
9683 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9684 stub_entry->root.string + 9,
9685 TRUE, FALSE);
9686 if (br_entry == NULL)
9687 {
9688 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9689 stub_entry->root.string);
9690 htab->stub_error = TRUE;
9691 return FALSE;
9692 }
9693
9694 if (br_entry->iter != htab->stub_iteration)
9695 {
9696 br_entry->iter = htab->stub_iteration;
9697 br_entry->offset = htab->brlt->size;
9698 htab->brlt->size += 8;
9699
9700 if (htab->relbrlt != NULL)
9701 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9702 else if (info->emitrelocations)
9703 {
9704 htab->brlt->reloc_count += 1;
9705 htab->brlt->flags |= SEC_RELOC;
9706 }
9707 }
9708
9709 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9710 off = (br_entry->offset
9711 + htab->brlt->output_offset
9712 + htab->brlt->output_section->vma
9713 - elf_gp (htab->brlt->output_section->owner)
9714 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9715
9716 if (info->emitrelocations)
9717 {
9718 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9719 stub_entry->stub_sec->flags |= SEC_RELOC;
9720 }
9721
9722 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9723 {
9724 size = 12;
9725 if (PPC_HA (off) != 0)
9726 size = 16;
9727 }
9728 else
9729 {
9730 size = 20;
9731 if (PPC_HA (off) != 0)
9732 size += 4;
9733
9734 if (PPC_HA (r2off) != 0)
9735 size += 4;
9736 }
9737 }
9738 else if (info->emitrelocations)
9739 {
9740 stub_entry->stub_sec->reloc_count += 1;
9741 stub_entry->stub_sec->flags |= SEC_RELOC;
9742 }
9743 }
9744
9745 stub_entry->stub_sec->size += size;
9746 return TRUE;
9747 }
9748
9749 /* Set up various things so that we can make a list of input sections
9750 for each output section included in the link. Returns -1 on error,
9751 0 when no stubs will be needed, and 1 on success. */
9752
9753 int
9754 ppc64_elf_setup_section_lists
9755 (struct bfd_link_info *info,
9756 asection *(*add_stub_section) (const char *, asection *),
9757 void (*layout_sections_again) (void))
9758 {
9759 bfd *input_bfd;
9760 int top_id, top_index, id;
9761 asection *section;
9762 asection **input_list;
9763 bfd_size_type amt;
9764 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9765
9766 if (htab == NULL)
9767 return -1;
9768 /* Stash our params away. */
9769 htab->add_stub_section = add_stub_section;
9770 htab->layout_sections_again = layout_sections_again;
9771
9772 if (htab->brlt == NULL)
9773 return 0;
9774
9775 /* Find the top input section id. */
9776 for (input_bfd = info->input_bfds, top_id = 3;
9777 input_bfd != NULL;
9778 input_bfd = input_bfd->link_next)
9779 {
9780 for (section = input_bfd->sections;
9781 section != NULL;
9782 section = section->next)
9783 {
9784 if (top_id < section->id)
9785 top_id = section->id;
9786 }
9787 }
9788
9789 htab->top_id = top_id;
9790 amt = sizeof (struct map_stub) * (top_id + 1);
9791 htab->stub_group = bfd_zmalloc (amt);
9792 if (htab->stub_group == NULL)
9793 return -1;
9794
9795 /* Set toc_off for com, und, abs and ind sections. */
9796 for (id = 0; id < 3; id++)
9797 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9798
9799 /* We can't use output_bfd->section_count here to find the top output
9800 section index as some sections may have been removed, and
9801 strip_excluded_output_sections doesn't renumber the indices. */
9802 for (section = info->output_bfd->sections, top_index = 0;
9803 section != NULL;
9804 section = section->next)
9805 {
9806 if (top_index < section->index)
9807 top_index = section->index;
9808 }
9809
9810 htab->top_index = top_index;
9811 amt = sizeof (asection *) * (top_index + 1);
9812 input_list = bfd_zmalloc (amt);
9813 htab->input_list = input_list;
9814 if (input_list == NULL)
9815 return -1;
9816
9817 return 1;
9818 }
9819
9820 /* Set up for first pass at multitoc partitioning. */
9821
9822 void
9823 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
9824 {
9825 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9826
9827 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
9828 htab->toc_curr = elf_gp (info->output_bfd);
9829 htab->toc_bfd = NULL;
9830 htab->toc_first_sec = NULL;
9831 }
9832
9833 /* The linker repeatedly calls this function for each TOC input section
9834 and linker generated GOT section. Group input bfds such that the toc
9835 within a group is less than 64k in size. */
9836
9837 bfd_boolean
9838 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9839 {
9840 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9841 bfd_vma addr, off, limit;
9842
9843 if (htab == NULL)
9844 return FALSE;
9845
9846 if (!htab->second_toc_pass)
9847 {
9848 /* Keep track of the first .toc or .got section for this input bfd. */
9849 if (htab->toc_bfd != isec->owner)
9850 {
9851 htab->toc_bfd = isec->owner;
9852 htab->toc_first_sec = isec;
9853 }
9854
9855 addr = isec->output_offset + isec->output_section->vma;
9856 off = addr - htab->toc_curr;
9857 limit = 0x80008000;
9858 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
9859 limit = 0x10000;
9860 if (off + isec->size > limit)
9861 {
9862 addr = (htab->toc_first_sec->output_offset
9863 + htab->toc_first_sec->output_section->vma);
9864 htab->toc_curr = addr;
9865 }
9866
9867 /* toc_curr is the base address of this toc group. Set elf_gp
9868 for the input section to be the offset relative to the
9869 output toc base plus 0x8000. Making the input elf_gp an
9870 offset allows us to move the toc as a whole without
9871 recalculating input elf_gp. */
9872 off = htab->toc_curr - elf_gp (isec->output_section->owner);
9873 off += TOC_BASE_OFF;
9874
9875 /* Die if someone uses a linker script that doesn't keep input
9876 file .toc and .got together. */
9877 if (elf_gp (isec->owner) != 0
9878 && elf_gp (isec->owner) != off)
9879 return FALSE;
9880
9881 elf_gp (isec->owner) = off;
9882 return TRUE;
9883 }
9884
9885 /* During the second pass toc_first_sec points to the start of
9886 a toc group, and toc_curr is used to track the old elf_gp.
9887 We use toc_bfd to ensure we only look at each bfd once. */
9888 if (htab->toc_bfd == isec->owner)
9889 return TRUE;
9890 htab->toc_bfd = isec->owner;
9891
9892 if (htab->toc_first_sec == NULL
9893 || htab->toc_curr != elf_gp (isec->owner))
9894 {
9895 htab->toc_curr = elf_gp (isec->owner);
9896 htab->toc_first_sec = isec;
9897 }
9898 addr = (htab->toc_first_sec->output_offset
9899 + htab->toc_first_sec->output_section->vma);
9900 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
9901 elf_gp (isec->owner) = off;
9902
9903 return TRUE;
9904 }
9905
9906 /* Called via elf_link_hash_traverse to merge GOT entries for global
9907 symbol H. */
9908
9909 static bfd_boolean
9910 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9911 {
9912 if (h->root.type == bfd_link_hash_indirect)
9913 return TRUE;
9914
9915 if (h->root.type == bfd_link_hash_warning)
9916 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9917
9918 merge_got_entries (&h->got.glist);
9919
9920 return TRUE;
9921 }
9922
9923 /* Called via elf_link_hash_traverse to allocate GOT entries for global
9924 symbol H. */
9925
9926 static bfd_boolean
9927 reallocate_got (struct elf_link_hash_entry *h, void *inf)
9928 {
9929 struct got_entry *gent;
9930
9931 if (h->root.type == bfd_link_hash_indirect)
9932 return TRUE;
9933
9934 if (h->root.type == bfd_link_hash_warning)
9935 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9936
9937 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9938 if (!gent->is_indirect)
9939 allocate_got (h, (struct bfd_link_info *) inf, gent);
9940 return TRUE;
9941 }
9942
9943 /* Called on the first multitoc pass after the last call to
9944 ppc64_elf_next_toc_section. This function removes duplicate GOT
9945 entries. */
9946
9947 bfd_boolean
9948 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
9949 {
9950 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9951 struct bfd *ibfd, *ibfd2;
9952 bfd_boolean done_something;
9953
9954 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
9955
9956 if (!htab->do_multi_toc)
9957 return FALSE;
9958
9959 /* Merge global sym got entries within a toc group. */
9960 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
9961
9962 /* And tlsld_got. */
9963 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9964 {
9965 struct got_entry *ent, *ent2;
9966
9967 if (!is_ppc64_elf (ibfd))
9968 continue;
9969
9970 ent = ppc64_tlsld_got (ibfd);
9971 if (!ent->is_indirect
9972 && ent->got.offset != (bfd_vma) -1)
9973 {
9974 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
9975 {
9976 if (!is_ppc64_elf (ibfd2))
9977 continue;
9978
9979 ent2 = ppc64_tlsld_got (ibfd2);
9980 if (!ent2->is_indirect
9981 && ent2->got.offset != (bfd_vma) -1
9982 && elf_gp (ibfd2) == elf_gp (ibfd))
9983 {
9984 ent2->is_indirect = TRUE;
9985 ent2->got.ent = ent;
9986 }
9987 }
9988 }
9989 }
9990
9991 /* Zap sizes of got sections. */
9992 htab->reliplt->rawsize = htab->reliplt->size;
9993 htab->reliplt->size -= htab->got_reli_size;
9994 htab->got_reli_size = 0;
9995
9996 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9997 {
9998 asection *got, *relgot;
9999
10000 if (!is_ppc64_elf (ibfd))
10001 continue;
10002
10003 got = ppc64_elf_tdata (ibfd)->got;
10004 if (got != NULL)
10005 {
10006 got->rawsize = got->size;
10007 got->size = 0;
10008 relgot = ppc64_elf_tdata (ibfd)->relgot;
10009 relgot->rawsize = relgot->size;
10010 relgot->size = 0;
10011 }
10012 }
10013
10014 /* Now reallocate the got, local syms first. We don't need to
10015 allocate section contents again since we never increase size. */
10016 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10017 {
10018 struct got_entry **lgot_ents;
10019 struct got_entry **end_lgot_ents;
10020 struct plt_entry **local_plt;
10021 struct plt_entry **end_local_plt;
10022 unsigned char *lgot_masks;
10023 bfd_size_type locsymcount;
10024 Elf_Internal_Shdr *symtab_hdr;
10025 asection *s, *srel;
10026
10027 if (!is_ppc64_elf (ibfd))
10028 continue;
10029
10030 lgot_ents = elf_local_got_ents (ibfd);
10031 if (!lgot_ents)
10032 continue;
10033
10034 symtab_hdr = &elf_symtab_hdr (ibfd);
10035 locsymcount = symtab_hdr->sh_info;
10036 end_lgot_ents = lgot_ents + locsymcount;
10037 local_plt = (struct plt_entry **) end_lgot_ents;
10038 end_local_plt = local_plt + locsymcount;
10039 lgot_masks = (unsigned char *) end_local_plt;
10040 s = ppc64_elf_tdata (ibfd)->got;
10041 srel = ppc64_elf_tdata (ibfd)->relgot;
10042 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10043 {
10044 struct got_entry *ent;
10045
10046 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10047 {
10048 unsigned int num = 1;
10049 ent->got.offset = s->size;
10050 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10051 num = 2;
10052 s->size += num * 8;
10053 if (info->shared)
10054 srel->size += num * sizeof (Elf64_External_Rela);
10055 else if ((*lgot_masks & PLT_IFUNC) != 0)
10056 {
10057 htab->reliplt->size
10058 += num * sizeof (Elf64_External_Rela);
10059 htab->got_reli_size
10060 += num * sizeof (Elf64_External_Rela);
10061 }
10062 }
10063 }
10064 }
10065
10066 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10067
10068 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10069 {
10070 struct got_entry *ent;
10071
10072 if (!is_ppc64_elf (ibfd))
10073 continue;
10074
10075 ent = ppc64_tlsld_got (ibfd);
10076 if (!ent->is_indirect
10077 && ent->got.offset != (bfd_vma) -1)
10078 {
10079 asection *s = ppc64_elf_tdata (ibfd)->got;
10080 ent->got.offset = s->size;
10081 s->size += 16;
10082 if (info->shared)
10083 {
10084 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10085 srel->size += sizeof (Elf64_External_Rela);
10086 }
10087 }
10088 }
10089
10090 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10091 if (!done_something)
10092 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10093 {
10094 asection *got;
10095
10096 if (!is_ppc64_elf (ibfd))
10097 continue;
10098
10099 got = ppc64_elf_tdata (ibfd)->got;
10100 if (got != NULL)
10101 {
10102 done_something = got->rawsize != got->size;
10103 if (done_something)
10104 break;
10105 }
10106 }
10107
10108 if (done_something)
10109 (*htab->layout_sections_again) ();
10110
10111 /* Set up for second pass over toc sections to recalculate elf_gp
10112 on input sections. */
10113 htab->toc_bfd = NULL;
10114 htab->toc_first_sec = NULL;
10115 htab->second_toc_pass = TRUE;
10116 return done_something;
10117 }
10118
10119 /* Called after second pass of multitoc partitioning. */
10120
10121 void
10122 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10123 {
10124 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10125
10126 if (htab == NULL)
10127 return;
10128
10129 /* After the second pass, toc_curr tracks the TOC offset used
10130 for code sections below in ppc64_elf_next_input_section. */
10131 htab->toc_curr = TOC_BASE_OFF;
10132 }
10133
10134 /* No toc references were found in ISEC. If the code in ISEC makes no
10135 calls, then there's no need to use toc adjusting stubs when branching
10136 into ISEC. Actually, indirect calls from ISEC are OK as they will
10137 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10138 needed, and 2 if a cyclical call-graph was found but no other reason
10139 for a stub was detected. If called from the top level, a return of
10140 2 means the same as a return of 0. */
10141
10142 static int
10143 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10144 {
10145 Elf_Internal_Rela *relstart, *rel;
10146 Elf_Internal_Sym *local_syms;
10147 int ret;
10148 struct ppc_link_hash_table *htab;
10149
10150 /* We know none of our code bearing sections will need toc stubs. */
10151 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10152 return 0;
10153
10154 if (isec->size == 0)
10155 return 0;
10156
10157 if (isec->output_section == NULL)
10158 return 0;
10159
10160 if (isec->reloc_count == 0)
10161 return 0;
10162
10163 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10164 info->keep_memory);
10165 if (relstart == NULL)
10166 return -1;
10167
10168 /* Look for branches to outside of this section. */
10169 local_syms = NULL;
10170 ret = 0;
10171 htab = ppc_hash_table (info);
10172 if (htab == NULL)
10173 return -1;
10174
10175 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10176 {
10177 enum elf_ppc64_reloc_type r_type;
10178 unsigned long r_symndx;
10179 struct elf_link_hash_entry *h;
10180 struct ppc_link_hash_entry *eh;
10181 Elf_Internal_Sym *sym;
10182 asection *sym_sec;
10183 struct _opd_sec_data *opd;
10184 bfd_vma sym_value;
10185 bfd_vma dest;
10186
10187 r_type = ELF64_R_TYPE (rel->r_info);
10188 if (r_type != R_PPC64_REL24
10189 && r_type != R_PPC64_REL14
10190 && r_type != R_PPC64_REL14_BRTAKEN
10191 && r_type != R_PPC64_REL14_BRNTAKEN)
10192 continue;
10193
10194 r_symndx = ELF64_R_SYM (rel->r_info);
10195 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10196 isec->owner))
10197 {
10198 ret = -1;
10199 break;
10200 }
10201
10202 /* Calls to dynamic lib functions go through a plt call stub
10203 that uses r2. */
10204 eh = (struct ppc_link_hash_entry *) h;
10205 if (eh != NULL
10206 && (eh->elf.plt.plist != NULL
10207 || (eh->oh != NULL
10208 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10209 {
10210 ret = 1;
10211 break;
10212 }
10213
10214 if (sym_sec == NULL)
10215 /* Ignore other undefined symbols. */
10216 continue;
10217
10218 /* Assume branches to other sections not included in the link need
10219 stubs too, to cover -R and absolute syms. */
10220 if (sym_sec->output_section == NULL)
10221 {
10222 ret = 1;
10223 break;
10224 }
10225
10226 if (h == NULL)
10227 sym_value = sym->st_value;
10228 else
10229 {
10230 if (h->root.type != bfd_link_hash_defined
10231 && h->root.type != bfd_link_hash_defweak)
10232 abort ();
10233 sym_value = h->root.u.def.value;
10234 }
10235 sym_value += rel->r_addend;
10236
10237 /* If this branch reloc uses an opd sym, find the code section. */
10238 opd = get_opd_info (sym_sec);
10239 if (opd != NULL)
10240 {
10241 if (h == NULL && opd->adjust != NULL)
10242 {
10243 long adjust;
10244
10245 adjust = opd->adjust[sym->st_value / 8];
10246 if (adjust == -1)
10247 /* Assume deleted functions won't ever be called. */
10248 continue;
10249 sym_value += adjust;
10250 }
10251
10252 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10253 if (dest == (bfd_vma) -1)
10254 continue;
10255 }
10256 else
10257 dest = (sym_value
10258 + sym_sec->output_offset
10259 + sym_sec->output_section->vma);
10260
10261 /* Ignore branch to self. */
10262 if (sym_sec == isec)
10263 continue;
10264
10265 /* If the called function uses the toc, we need a stub. */
10266 if (sym_sec->has_toc_reloc
10267 || sym_sec->makes_toc_func_call)
10268 {
10269 ret = 1;
10270 break;
10271 }
10272
10273 /* Assume any branch that needs a long branch stub might in fact
10274 need a plt_branch stub. A plt_branch stub uses r2. */
10275 else if (dest - (isec->output_offset
10276 + isec->output_section->vma
10277 + rel->r_offset) + (1 << 25) >= (2 << 25))
10278 {
10279 ret = 1;
10280 break;
10281 }
10282
10283 /* If calling back to a section in the process of being tested, we
10284 can't say for sure that no toc adjusting stubs are needed, so
10285 don't return zero. */
10286 else if (sym_sec->call_check_in_progress)
10287 ret = 2;
10288
10289 /* Branches to another section that itself doesn't have any TOC
10290 references are OK. Recursively call ourselves to check. */
10291 else if (sym_sec->id <= htab->top_id
10292 && htab->stub_group[sym_sec->id].toc_off == 0)
10293 {
10294 int recur;
10295
10296 /* Mark current section as indeterminate, so that other
10297 sections that call back to current won't be marked as
10298 known. */
10299 isec->call_check_in_progress = 1;
10300 recur = toc_adjusting_stub_needed (info, sym_sec);
10301 isec->call_check_in_progress = 0;
10302
10303 if (recur < 0)
10304 {
10305 /* An error. Exit. */
10306 ret = -1;
10307 break;
10308 }
10309 else if (recur <= 1)
10310 {
10311 /* Known result. Mark as checked and set section flag. */
10312 htab->stub_group[sym_sec->id].toc_off = 1;
10313 if (recur != 0)
10314 {
10315 sym_sec->makes_toc_func_call = 1;
10316 ret = 1;
10317 break;
10318 }
10319 }
10320 else
10321 {
10322 /* Unknown result. Continue checking. */
10323 ret = 2;
10324 }
10325 }
10326 }
10327
10328 if (local_syms != NULL
10329 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
10330 free (local_syms);
10331 if (elf_section_data (isec)->relocs != relstart)
10332 free (relstart);
10333
10334 return ret;
10335 }
10336
10337 /* The linker repeatedly calls this function for each input section,
10338 in the order that input sections are linked into output sections.
10339 Build lists of input sections to determine groupings between which
10340 we may insert linker stubs. */
10341
10342 bfd_boolean
10343 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10344 {
10345 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10346
10347 if (htab == NULL)
10348 return FALSE;
10349
10350 if ((isec->output_section->flags & SEC_CODE) != 0
10351 && isec->output_section->index <= htab->top_index)
10352 {
10353 asection **list = htab->input_list + isec->output_section->index;
10354 /* Steal the link_sec pointer for our list. */
10355 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10356 /* This happens to make the list in reverse order,
10357 which is what we want. */
10358 PREV_SEC (isec) = *list;
10359 *list = isec;
10360 }
10361
10362 if (htab->multi_toc_needed)
10363 {
10364 /* If a code section has a function that uses the TOC then we need
10365 to use the right TOC (obviously). Also, make sure that .opd gets
10366 the correct TOC value for R_PPC64_TOC relocs that don't have or
10367 can't find their function symbol (shouldn't ever happen now).
10368 Also specially treat .fixup for the linux kernel. .fixup
10369 contains branches, but only back to the function that hit an
10370 exception. */
10371 if (isec->has_toc_reloc
10372 || (isec->flags & SEC_CODE) == 0
10373 || strcmp (isec->name, ".fixup") == 0)
10374 {
10375 if (elf_gp (isec->owner) != 0)
10376 htab->toc_curr = elf_gp (isec->owner);
10377 }
10378 else if (htab->stub_group[isec->id].toc_off == 0)
10379 {
10380 int ret = toc_adjusting_stub_needed (info, isec);
10381 if (ret < 0)
10382 return FALSE;
10383 else
10384 isec->makes_toc_func_call = ret & 1;
10385 }
10386 }
10387
10388 /* Functions that don't use the TOC can belong in any TOC group.
10389 Use the last TOC base. This happens to make _init and _fini
10390 pasting work. */
10391 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10392 return TRUE;
10393 }
10394
10395 /* See whether we can group stub sections together. Grouping stub
10396 sections may result in fewer stubs. More importantly, we need to
10397 put all .init* and .fini* stubs at the beginning of the .init or
10398 .fini output sections respectively, because glibc splits the
10399 _init and _fini functions into multiple parts. Putting a stub in
10400 the middle of a function is not a good idea. */
10401
10402 static void
10403 group_sections (struct ppc_link_hash_table *htab,
10404 bfd_size_type stub_group_size,
10405 bfd_boolean stubs_always_before_branch)
10406 {
10407 asection **list;
10408 bfd_size_type stub14_group_size;
10409 bfd_boolean suppress_size_errors;
10410
10411 suppress_size_errors = FALSE;
10412 stub14_group_size = stub_group_size;
10413 if (stub_group_size == 1)
10414 {
10415 /* Default values. */
10416 if (stubs_always_before_branch)
10417 {
10418 stub_group_size = 0x1e00000;
10419 stub14_group_size = 0x7800;
10420 }
10421 else
10422 {
10423 stub_group_size = 0x1c00000;
10424 stub14_group_size = 0x7000;
10425 }
10426 suppress_size_errors = TRUE;
10427 }
10428
10429 list = htab->input_list + htab->top_index;
10430 do
10431 {
10432 asection *tail = *list;
10433 while (tail != NULL)
10434 {
10435 asection *curr;
10436 asection *prev;
10437 bfd_size_type total;
10438 bfd_boolean big_sec;
10439 bfd_vma curr_toc;
10440
10441 curr = tail;
10442 total = tail->size;
10443 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
10444 ? stub14_group_size : stub_group_size);
10445 if (big_sec && !suppress_size_errors)
10446 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10447 tail->owner, tail);
10448 curr_toc = htab->stub_group[tail->id].toc_off;
10449
10450 while ((prev = PREV_SEC (curr)) != NULL
10451 && ((total += curr->output_offset - prev->output_offset)
10452 < (ppc64_elf_section_data (prev)->has_14bit_branch
10453 ? stub14_group_size : stub_group_size))
10454 && htab->stub_group[prev->id].toc_off == curr_toc)
10455 curr = prev;
10456
10457 /* OK, the size from the start of CURR to the end is less
10458 than stub_group_size and thus can be handled by one stub
10459 section. (or the tail section is itself larger than
10460 stub_group_size, in which case we may be toast.) We
10461 should really be keeping track of the total size of stubs
10462 added here, as stubs contribute to the final output
10463 section size. That's a little tricky, and this way will
10464 only break if stubs added make the total size more than
10465 2^25, ie. for the default stub_group_size, if stubs total
10466 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10467 do
10468 {
10469 prev = PREV_SEC (tail);
10470 /* Set up this stub group. */
10471 htab->stub_group[tail->id].link_sec = curr;
10472 }
10473 while (tail != curr && (tail = prev) != NULL);
10474
10475 /* But wait, there's more! Input sections up to stub_group_size
10476 bytes before the stub section can be handled by it too.
10477 Don't do this if we have a really large section after the
10478 stubs, as adding more stubs increases the chance that
10479 branches may not reach into the stub section. */
10480 if (!stubs_always_before_branch && !big_sec)
10481 {
10482 total = 0;
10483 while (prev != NULL
10484 && ((total += tail->output_offset - prev->output_offset)
10485 < (ppc64_elf_section_data (prev)->has_14bit_branch
10486 ? stub14_group_size : stub_group_size))
10487 && htab->stub_group[prev->id].toc_off == curr_toc)
10488 {
10489 tail = prev;
10490 prev = PREV_SEC (tail);
10491 htab->stub_group[tail->id].link_sec = curr;
10492 }
10493 }
10494 tail = prev;
10495 }
10496 }
10497 while (list-- != htab->input_list);
10498 free (htab->input_list);
10499 #undef PREV_SEC
10500 }
10501
10502 /* Determine and set the size of the stub section for a final link.
10503
10504 The basic idea here is to examine all the relocations looking for
10505 PC-relative calls to a target that is unreachable with a "bl"
10506 instruction. */
10507
10508 bfd_boolean
10509 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10510 {
10511 bfd_size_type stub_group_size;
10512 bfd_boolean stubs_always_before_branch;
10513 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10514
10515 if (htab == NULL)
10516 return FALSE;
10517
10518 stubs_always_before_branch = group_size < 0;
10519 if (group_size < 0)
10520 stub_group_size = -group_size;
10521 else
10522 stub_group_size = group_size;
10523
10524 group_sections (htab, stub_group_size, stubs_always_before_branch);
10525
10526 while (1)
10527 {
10528 bfd *input_bfd;
10529 unsigned int bfd_indx;
10530 asection *stub_sec;
10531
10532 htab->stub_iteration += 1;
10533
10534 for (input_bfd = info->input_bfds, bfd_indx = 0;
10535 input_bfd != NULL;
10536 input_bfd = input_bfd->link_next, bfd_indx++)
10537 {
10538 Elf_Internal_Shdr *symtab_hdr;
10539 asection *section;
10540 Elf_Internal_Sym *local_syms = NULL;
10541
10542 if (!is_ppc64_elf (input_bfd))
10543 continue;
10544
10545 /* We'll need the symbol table in a second. */
10546 symtab_hdr = &elf_symtab_hdr (input_bfd);
10547 if (symtab_hdr->sh_info == 0)
10548 continue;
10549
10550 /* Walk over each section attached to the input bfd. */
10551 for (section = input_bfd->sections;
10552 section != NULL;
10553 section = section->next)
10554 {
10555 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10556
10557 /* If there aren't any relocs, then there's nothing more
10558 to do. */
10559 if ((section->flags & SEC_RELOC) == 0
10560 || (section->flags & SEC_ALLOC) == 0
10561 || (section->flags & SEC_LOAD) == 0
10562 || (section->flags & SEC_CODE) == 0
10563 || section->reloc_count == 0)
10564 continue;
10565
10566 /* If this section is a link-once section that will be
10567 discarded, then don't create any stubs. */
10568 if (section->output_section == NULL
10569 || section->output_section->owner != info->output_bfd)
10570 continue;
10571
10572 /* Get the relocs. */
10573 internal_relocs
10574 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10575 info->keep_memory);
10576 if (internal_relocs == NULL)
10577 goto error_ret_free_local;
10578
10579 /* Now examine each relocation. */
10580 irela = internal_relocs;
10581 irelaend = irela + section->reloc_count;
10582 for (; irela < irelaend; irela++)
10583 {
10584 enum elf_ppc64_reloc_type r_type;
10585 unsigned int r_indx;
10586 enum ppc_stub_type stub_type;
10587 struct ppc_stub_hash_entry *stub_entry;
10588 asection *sym_sec, *code_sec;
10589 bfd_vma sym_value, code_value;
10590 bfd_vma destination;
10591 bfd_boolean ok_dest;
10592 struct ppc_link_hash_entry *hash;
10593 struct ppc_link_hash_entry *fdh;
10594 struct elf_link_hash_entry *h;
10595 Elf_Internal_Sym *sym;
10596 char *stub_name;
10597 const asection *id_sec;
10598 struct _opd_sec_data *opd;
10599 struct plt_entry *plt_ent;
10600
10601 r_type = ELF64_R_TYPE (irela->r_info);
10602 r_indx = ELF64_R_SYM (irela->r_info);
10603
10604 if (r_type >= R_PPC64_max)
10605 {
10606 bfd_set_error (bfd_error_bad_value);
10607 goto error_ret_free_internal;
10608 }
10609
10610 /* Only look for stubs on branch instructions. */
10611 if (r_type != R_PPC64_REL24
10612 && r_type != R_PPC64_REL14
10613 && r_type != R_PPC64_REL14_BRTAKEN
10614 && r_type != R_PPC64_REL14_BRNTAKEN)
10615 continue;
10616
10617 /* Now determine the call target, its name, value,
10618 section. */
10619 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10620 r_indx, input_bfd))
10621 goto error_ret_free_internal;
10622 hash = (struct ppc_link_hash_entry *) h;
10623
10624 ok_dest = FALSE;
10625 fdh = NULL;
10626 sym_value = 0;
10627 if (hash == NULL)
10628 {
10629 sym_value = sym->st_value;
10630 ok_dest = TRUE;
10631 }
10632 else if (hash->elf.root.type == bfd_link_hash_defined
10633 || hash->elf.root.type == bfd_link_hash_defweak)
10634 {
10635 sym_value = hash->elf.root.u.def.value;
10636 if (sym_sec->output_section != NULL)
10637 ok_dest = TRUE;
10638 }
10639 else if (hash->elf.root.type == bfd_link_hash_undefweak
10640 || hash->elf.root.type == bfd_link_hash_undefined)
10641 {
10642 /* Recognise an old ABI func code entry sym, and
10643 use the func descriptor sym instead if it is
10644 defined. */
10645 if (hash->elf.root.root.string[0] == '.'
10646 && (fdh = lookup_fdh (hash, htab)) != NULL)
10647 {
10648 if (fdh->elf.root.type == bfd_link_hash_defined
10649 || fdh->elf.root.type == bfd_link_hash_defweak)
10650 {
10651 sym_sec = fdh->elf.root.u.def.section;
10652 sym_value = fdh->elf.root.u.def.value;
10653 if (sym_sec->output_section != NULL)
10654 ok_dest = TRUE;
10655 }
10656 else
10657 fdh = NULL;
10658 }
10659 }
10660 else
10661 {
10662 bfd_set_error (bfd_error_bad_value);
10663 goto error_ret_free_internal;
10664 }
10665
10666 destination = 0;
10667 if (ok_dest)
10668 {
10669 sym_value += irela->r_addend;
10670 destination = (sym_value
10671 + sym_sec->output_offset
10672 + sym_sec->output_section->vma);
10673 }
10674
10675 code_sec = sym_sec;
10676 code_value = sym_value;
10677 opd = get_opd_info (sym_sec);
10678 if (opd != NULL)
10679 {
10680 bfd_vma dest;
10681
10682 if (hash == NULL && opd->adjust != NULL)
10683 {
10684 long adjust = opd->adjust[sym_value / 8];
10685 if (adjust == -1)
10686 continue;
10687 code_value += adjust;
10688 sym_value += adjust;
10689 }
10690 dest = opd_entry_value (sym_sec, sym_value,
10691 &code_sec, &code_value);
10692 if (dest != (bfd_vma) -1)
10693 {
10694 destination = dest;
10695 if (fdh != NULL)
10696 {
10697 /* Fixup old ABI sym to point at code
10698 entry. */
10699 hash->elf.root.type = bfd_link_hash_defweak;
10700 hash->elf.root.u.def.section = code_sec;
10701 hash->elf.root.u.def.value = code_value;
10702 }
10703 }
10704 }
10705
10706 /* Determine what (if any) linker stub is needed. */
10707 plt_ent = NULL;
10708 stub_type = ppc_type_of_stub (section, irela, &hash,
10709 &plt_ent, destination);
10710
10711 if (stub_type != ppc_stub_plt_call)
10712 {
10713 /* Check whether we need a TOC adjusting stub.
10714 Since the linker pastes together pieces from
10715 different object files when creating the
10716 _init and _fini functions, it may be that a
10717 call to what looks like a local sym is in
10718 fact a call needing a TOC adjustment. */
10719 if (code_sec != NULL
10720 && code_sec->output_section != NULL
10721 && (htab->stub_group[code_sec->id].toc_off
10722 != htab->stub_group[section->id].toc_off)
10723 && (code_sec->has_toc_reloc
10724 || code_sec->makes_toc_func_call))
10725 stub_type = ppc_stub_long_branch_r2off;
10726 }
10727
10728 if (stub_type == ppc_stub_none)
10729 continue;
10730
10731 /* __tls_get_addr calls might be eliminated. */
10732 if (stub_type != ppc_stub_plt_call
10733 && hash != NULL
10734 && (hash == htab->tls_get_addr
10735 || hash == htab->tls_get_addr_fd)
10736 && section->has_tls_reloc
10737 && irela != internal_relocs)
10738 {
10739 /* Get tls info. */
10740 unsigned char *tls_mask;
10741
10742 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10743 irela - 1, input_bfd))
10744 goto error_ret_free_internal;
10745 if (*tls_mask != 0)
10746 continue;
10747 }
10748
10749 /* Support for grouping stub sections. */
10750 id_sec = htab->stub_group[section->id].link_sec;
10751
10752 /* Get the name of this stub. */
10753 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10754 if (!stub_name)
10755 goto error_ret_free_internal;
10756
10757 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10758 stub_name, FALSE, FALSE);
10759 if (stub_entry != NULL)
10760 {
10761 /* The proper stub has already been created. */
10762 free (stub_name);
10763 continue;
10764 }
10765
10766 stub_entry = ppc_add_stub (stub_name, section, htab);
10767 if (stub_entry == NULL)
10768 {
10769 free (stub_name);
10770 error_ret_free_internal:
10771 if (elf_section_data (section)->relocs == NULL)
10772 free (internal_relocs);
10773 error_ret_free_local:
10774 if (local_syms != NULL
10775 && (symtab_hdr->contents
10776 != (unsigned char *) local_syms))
10777 free (local_syms);
10778 return FALSE;
10779 }
10780
10781 stub_entry->stub_type = stub_type;
10782 if (stub_type != ppc_stub_plt_call)
10783 {
10784 stub_entry->target_value = code_value;
10785 stub_entry->target_section = code_sec;
10786 }
10787 else
10788 {
10789 stub_entry->target_value = sym_value;
10790 stub_entry->target_section = sym_sec;
10791 }
10792 stub_entry->h = hash;
10793 stub_entry->plt_ent = plt_ent;
10794 stub_entry->addend = irela->r_addend;
10795
10796 if (stub_entry->h != NULL)
10797 htab->stub_globals += 1;
10798 }
10799
10800 /* We're done with the internal relocs, free them. */
10801 if (elf_section_data (section)->relocs != internal_relocs)
10802 free (internal_relocs);
10803 }
10804
10805 if (local_syms != NULL
10806 && symtab_hdr->contents != (unsigned char *) local_syms)
10807 {
10808 if (!info->keep_memory)
10809 free (local_syms);
10810 else
10811 symtab_hdr->contents = (unsigned char *) local_syms;
10812 }
10813 }
10814
10815 /* We may have added some stubs. Find out the new size of the
10816 stub sections. */
10817 for (stub_sec = htab->stub_bfd->sections;
10818 stub_sec != NULL;
10819 stub_sec = stub_sec->next)
10820 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10821 {
10822 stub_sec->rawsize = stub_sec->size;
10823 stub_sec->size = 0;
10824 stub_sec->reloc_count = 0;
10825 stub_sec->flags &= ~SEC_RELOC;
10826 }
10827
10828 htab->brlt->size = 0;
10829 htab->brlt->reloc_count = 0;
10830 htab->brlt->flags &= ~SEC_RELOC;
10831 if (htab->relbrlt != NULL)
10832 htab->relbrlt->size = 0;
10833
10834 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10835
10836 if (info->emitrelocations
10837 && htab->glink != NULL && htab->glink->size != 0)
10838 {
10839 htab->glink->reloc_count = 1;
10840 htab->glink->flags |= SEC_RELOC;
10841 }
10842
10843 for (stub_sec = htab->stub_bfd->sections;
10844 stub_sec != NULL;
10845 stub_sec = stub_sec->next)
10846 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10847 && stub_sec->rawsize != stub_sec->size)
10848 break;
10849
10850 /* Exit from this loop when no stubs have been added, and no stubs
10851 have changed size. */
10852 if (stub_sec == NULL)
10853 break;
10854
10855 /* Ask the linker to do its stuff. */
10856 (*htab->layout_sections_again) ();
10857 }
10858
10859 /* It would be nice to strip htab->brlt from the output if the
10860 section is empty, but it's too late. If we strip sections here,
10861 the dynamic symbol table is corrupted since the section symbol
10862 for the stripped section isn't written. */
10863
10864 return TRUE;
10865 }
10866
10867 /* Called after we have determined section placement. If sections
10868 move, we'll be called again. Provide a value for TOCstart. */
10869
10870 bfd_vma
10871 ppc64_elf_toc (bfd *obfd)
10872 {
10873 asection *s;
10874 bfd_vma TOCstart;
10875
10876 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10877 order. The TOC starts where the first of these sections starts. */
10878 s = bfd_get_section_by_name (obfd, ".got");
10879 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10880 s = bfd_get_section_by_name (obfd, ".toc");
10881 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10882 s = bfd_get_section_by_name (obfd, ".tocbss");
10883 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10884 s = bfd_get_section_by_name (obfd, ".plt");
10885 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10886 {
10887 /* This may happen for
10888 o references to TOC base (SYM@toc / TOC[tc0]) without a
10889 .toc directive
10890 o bad linker script
10891 o --gc-sections and empty TOC sections
10892
10893 FIXME: Warn user? */
10894
10895 /* Look for a likely section. We probably won't even be
10896 using TOCstart. */
10897 for (s = obfd->sections; s != NULL; s = s->next)
10898 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10899 | SEC_EXCLUDE))
10900 == (SEC_ALLOC | SEC_SMALL_DATA))
10901 break;
10902 if (s == NULL)
10903 for (s = obfd->sections; s != NULL; s = s->next)
10904 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10905 == (SEC_ALLOC | SEC_SMALL_DATA))
10906 break;
10907 if (s == NULL)
10908 for (s = obfd->sections; s != NULL; s = s->next)
10909 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10910 == SEC_ALLOC)
10911 break;
10912 if (s == NULL)
10913 for (s = obfd->sections; s != NULL; s = s->next)
10914 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10915 break;
10916 }
10917
10918 TOCstart = 0;
10919 if (s != NULL)
10920 TOCstart = s->output_section->vma + s->output_offset;
10921
10922 return TOCstart;
10923 }
10924
10925 /* Build all the stubs associated with the current output file.
10926 The stubs are kept in a hash table attached to the main linker
10927 hash table. This function is called via gldelf64ppc_finish. */
10928
10929 bfd_boolean
10930 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10931 struct bfd_link_info *info,
10932 char **stats)
10933 {
10934 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10935 asection *stub_sec;
10936 bfd_byte *p;
10937 int stub_sec_count = 0;
10938
10939 if (htab == NULL)
10940 return FALSE;
10941
10942 htab->emit_stub_syms = emit_stub_syms;
10943
10944 /* Allocate memory to hold the linker stubs. */
10945 for (stub_sec = htab->stub_bfd->sections;
10946 stub_sec != NULL;
10947 stub_sec = stub_sec->next)
10948 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10949 && stub_sec->size != 0)
10950 {
10951 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10952 if (stub_sec->contents == NULL)
10953 return FALSE;
10954 /* We want to check that built size is the same as calculated
10955 size. rawsize is a convenient location to use. */
10956 stub_sec->rawsize = stub_sec->size;
10957 stub_sec->size = 0;
10958 }
10959
10960 if (htab->glink != NULL && htab->glink->size != 0)
10961 {
10962 unsigned int indx;
10963 bfd_vma plt0;
10964
10965 /* Build the .glink plt call stub. */
10966 if (htab->emit_stub_syms)
10967 {
10968 struct elf_link_hash_entry *h;
10969 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10970 TRUE, FALSE, FALSE);
10971 if (h == NULL)
10972 return FALSE;
10973 if (h->root.type == bfd_link_hash_new)
10974 {
10975 h->root.type = bfd_link_hash_defined;
10976 h->root.u.def.section = htab->glink;
10977 h->root.u.def.value = 8;
10978 h->ref_regular = 1;
10979 h->def_regular = 1;
10980 h->ref_regular_nonweak = 1;
10981 h->forced_local = 1;
10982 h->non_elf = 0;
10983 }
10984 }
10985 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10986 if (info->emitrelocations)
10987 {
10988 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10989 if (r == NULL)
10990 return FALSE;
10991 r->r_offset = (htab->glink->output_offset
10992 + htab->glink->output_section->vma);
10993 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10994 r->r_addend = plt0;
10995 }
10996 p = htab->glink->contents;
10997 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10998 bfd_put_64 (htab->glink->owner, plt0, p);
10999 p += 8;
11000 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11001 p += 4;
11002 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11003 p += 4;
11004 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11005 p += 4;
11006 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11007 p += 4;
11008 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11009 p += 4;
11010 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11011 p += 4;
11012 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11013 p += 4;
11014 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11015 p += 4;
11016 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11017 p += 4;
11018 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11019 p += 4;
11020 bfd_put_32 (htab->glink->owner, BCTR, p);
11021 p += 4;
11022 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11023 {
11024 bfd_put_32 (htab->glink->owner, NOP, p);
11025 p += 4;
11026 }
11027
11028 /* Build the .glink lazy link call stubs. */
11029 indx = 0;
11030 while (p < htab->glink->contents + htab->glink->size)
11031 {
11032 if (indx < 0x8000)
11033 {
11034 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11035 p += 4;
11036 }
11037 else
11038 {
11039 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11040 p += 4;
11041 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11042 p += 4;
11043 }
11044 bfd_put_32 (htab->glink->owner,
11045 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11046 indx++;
11047 p += 4;
11048 }
11049 htab->glink->rawsize = p - htab->glink->contents;
11050 }
11051
11052 if (htab->brlt->size != 0)
11053 {
11054 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11055 htab->brlt->size);
11056 if (htab->brlt->contents == NULL)
11057 return FALSE;
11058 }
11059 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11060 {
11061 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11062 htab->relbrlt->size);
11063 if (htab->relbrlt->contents == NULL)
11064 return FALSE;
11065 }
11066
11067 /* Build the stubs as directed by the stub hash table. */
11068 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11069
11070 if (htab->relbrlt != NULL)
11071 htab->relbrlt->reloc_count = 0;
11072
11073 for (stub_sec = htab->stub_bfd->sections;
11074 stub_sec != NULL;
11075 stub_sec = stub_sec->next)
11076 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11077 {
11078 stub_sec_count += 1;
11079 if (stub_sec->rawsize != stub_sec->size)
11080 break;
11081 }
11082
11083 if (stub_sec != NULL
11084 || htab->glink->rawsize != htab->glink->size)
11085 {
11086 htab->stub_error = TRUE;
11087 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11088 }
11089
11090 if (htab->stub_error)
11091 return FALSE;
11092
11093 if (stats != NULL)
11094 {
11095 *stats = bfd_malloc (500);
11096 if (*stats == NULL)
11097 return FALSE;
11098
11099 sprintf (*stats, _("linker stubs in %u group%s\n"
11100 " branch %lu\n"
11101 " toc adjust %lu\n"
11102 " long branch %lu\n"
11103 " long toc adj %lu\n"
11104 " plt call %lu"),
11105 stub_sec_count,
11106 stub_sec_count == 1 ? "" : "s",
11107 htab->stub_count[ppc_stub_long_branch - 1],
11108 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11109 htab->stub_count[ppc_stub_plt_branch - 1],
11110 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11111 htab->stub_count[ppc_stub_plt_call - 1]);
11112 }
11113 return TRUE;
11114 }
11115
11116 /* This function undoes the changes made by add_symbol_adjust. */
11117
11118 static bfd_boolean
11119 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11120 {
11121 struct ppc_link_hash_entry *eh;
11122
11123 if (h->root.type == bfd_link_hash_indirect)
11124 return TRUE;
11125
11126 if (h->root.type == bfd_link_hash_warning)
11127 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11128
11129 eh = (struct ppc_link_hash_entry *) h;
11130 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11131 return TRUE;
11132
11133 eh->elf.root.type = bfd_link_hash_undefined;
11134 return TRUE;
11135 }
11136
11137 void
11138 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11139 {
11140 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11141
11142 if (htab != NULL)
11143 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11144 }
11145
11146 /* What to do when ld finds relocations against symbols defined in
11147 discarded sections. */
11148
11149 static unsigned int
11150 ppc64_elf_action_discarded (asection *sec)
11151 {
11152 if (strcmp (".opd", sec->name) == 0)
11153 return 0;
11154
11155 if (strcmp (".toc", sec->name) == 0)
11156 return 0;
11157
11158 if (strcmp (".toc1", sec->name) == 0)
11159 return 0;
11160
11161 return _bfd_elf_default_action_discarded (sec);
11162 }
11163
11164 /* The RELOCATE_SECTION function is called by the ELF backend linker
11165 to handle the relocations for a section.
11166
11167 The relocs are always passed as Rela structures; if the section
11168 actually uses Rel structures, the r_addend field will always be
11169 zero.
11170
11171 This function is responsible for adjust the section contents as
11172 necessary, and (if using Rela relocs and generating a
11173 relocatable output file) adjusting the reloc addend as
11174 necessary.
11175
11176 This function does not have to worry about setting the reloc
11177 address or the reloc symbol index.
11178
11179 LOCAL_SYMS is a pointer to the swapped in local symbols.
11180
11181 LOCAL_SECTIONS is an array giving the section in the input file
11182 corresponding to the st_shndx field of each local symbol.
11183
11184 The global hash table entry for the global symbols can be found
11185 via elf_sym_hashes (input_bfd).
11186
11187 When generating relocatable output, this function must handle
11188 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11189 going to be the section symbol corresponding to the output
11190 section, which means that the addend must be adjusted
11191 accordingly. */
11192
11193 static bfd_boolean
11194 ppc64_elf_relocate_section (bfd *output_bfd,
11195 struct bfd_link_info *info,
11196 bfd *input_bfd,
11197 asection *input_section,
11198 bfd_byte *contents,
11199 Elf_Internal_Rela *relocs,
11200 Elf_Internal_Sym *local_syms,
11201 asection **local_sections)
11202 {
11203 struct ppc_link_hash_table *htab;
11204 Elf_Internal_Shdr *symtab_hdr;
11205 struct elf_link_hash_entry **sym_hashes;
11206 Elf_Internal_Rela *rel;
11207 Elf_Internal_Rela *relend;
11208 Elf_Internal_Rela outrel;
11209 bfd_byte *loc;
11210 struct got_entry **local_got_ents;
11211 bfd_vma TOCstart;
11212 bfd_boolean ret = TRUE;
11213 bfd_boolean is_opd;
11214 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11215 bfd_boolean is_power4 = FALSE;
11216 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11217
11218 /* Initialize howto table if needed. */
11219 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11220 ppc_howto_init ();
11221
11222 htab = ppc_hash_table (info);
11223 if (htab == NULL)
11224 return FALSE;
11225
11226 /* Don't relocate stub sections. */
11227 if (input_section->owner == htab->stub_bfd)
11228 return TRUE;
11229
11230 BFD_ASSERT (is_ppc64_elf (input_bfd));
11231
11232 local_got_ents = elf_local_got_ents (input_bfd);
11233 TOCstart = elf_gp (output_bfd);
11234 symtab_hdr = &elf_symtab_hdr (input_bfd);
11235 sym_hashes = elf_sym_hashes (input_bfd);
11236 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11237
11238 rel = relocs;
11239 relend = relocs + input_section->reloc_count;
11240 for (; rel < relend; rel++)
11241 {
11242 enum elf_ppc64_reloc_type r_type;
11243 bfd_vma addend, orig_addend;
11244 bfd_reloc_status_type r;
11245 Elf_Internal_Sym *sym;
11246 asection *sec;
11247 struct elf_link_hash_entry *h_elf;
11248 struct ppc_link_hash_entry *h;
11249 struct ppc_link_hash_entry *fdh;
11250 const char *sym_name;
11251 unsigned long r_symndx, toc_symndx;
11252 bfd_vma toc_addend;
11253 unsigned char tls_mask, tls_gd, tls_type;
11254 unsigned char sym_type;
11255 bfd_vma relocation;
11256 bfd_boolean unresolved_reloc;
11257 bfd_boolean warned;
11258 unsigned long insn, mask;
11259 struct ppc_stub_hash_entry *stub_entry;
11260 bfd_vma max_br_offset;
11261 bfd_vma from;
11262
11263 r_type = ELF64_R_TYPE (rel->r_info);
11264 r_symndx = ELF64_R_SYM (rel->r_info);
11265
11266 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11267 symbol of the previous ADDR64 reloc. The symbol gives us the
11268 proper TOC base to use. */
11269 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11270 && rel != relocs
11271 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11272 && is_opd)
11273 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11274
11275 sym = NULL;
11276 sec = NULL;
11277 h_elf = NULL;
11278 sym_name = NULL;
11279 unresolved_reloc = FALSE;
11280 warned = FALSE;
11281 orig_addend = rel->r_addend;
11282
11283 if (r_symndx < symtab_hdr->sh_info)
11284 {
11285 /* It's a local symbol. */
11286 struct _opd_sec_data *opd;
11287
11288 sym = local_syms + r_symndx;
11289 sec = local_sections[r_symndx];
11290 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11291 sym_type = ELF64_ST_TYPE (sym->st_info);
11292 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11293 opd = get_opd_info (sec);
11294 if (opd != NULL && opd->adjust != NULL)
11295 {
11296 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11297 if (adjust == -1)
11298 relocation = 0;
11299 else
11300 {
11301 /* If this is a relocation against the opd section sym
11302 and we have edited .opd, adjust the reloc addend so
11303 that ld -r and ld --emit-relocs output is correct.
11304 If it is a reloc against some other .opd symbol,
11305 then the symbol value will be adjusted later. */
11306 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11307 rel->r_addend += adjust;
11308 else
11309 relocation += adjust;
11310 }
11311 }
11312 }
11313 else
11314 {
11315 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11316 r_symndx, symtab_hdr, sym_hashes,
11317 h_elf, sec, relocation,
11318 unresolved_reloc, warned);
11319 sym_name = h_elf->root.root.string;
11320 sym_type = h_elf->type;
11321 }
11322 h = (struct ppc_link_hash_entry *) h_elf;
11323
11324 if (sec != NULL && elf_discarded_section (sec))
11325 {
11326 /* For relocs against symbols from removed linkonce sections,
11327 or sections discarded by a linker script, we just want the
11328 section contents zeroed. Avoid any special processing. */
11329 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11330 contents + rel->r_offset);
11331 rel->r_info = 0;
11332 rel->r_addend = 0;
11333 continue;
11334 }
11335
11336 if (info->relocatable)
11337 continue;
11338
11339 /* TLS optimizations. Replace instruction sequences and relocs
11340 based on information we collected in tls_optimize. We edit
11341 RELOCS so that --emit-relocs will output something sensible
11342 for the final instruction stream. */
11343 tls_mask = 0;
11344 tls_gd = 0;
11345 toc_symndx = 0;
11346 if (h != NULL)
11347 tls_mask = h->tls_mask;
11348 else if (local_got_ents != NULL)
11349 {
11350 struct plt_entry **local_plt = (struct plt_entry **)
11351 (local_got_ents + symtab_hdr->sh_info);
11352 unsigned char *lgot_masks = (unsigned char *)
11353 (local_plt + symtab_hdr->sh_info);
11354 tls_mask = lgot_masks[r_symndx];
11355 }
11356 if (tls_mask == 0
11357 && (r_type == R_PPC64_TLS
11358 || r_type == R_PPC64_TLSGD
11359 || r_type == R_PPC64_TLSLD))
11360 {
11361 /* Check for toc tls entries. */
11362 unsigned char *toc_tls;
11363
11364 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11365 &local_syms, rel, input_bfd))
11366 return FALSE;
11367
11368 if (toc_tls)
11369 tls_mask = *toc_tls;
11370 }
11371
11372 /* Check that tls relocs are used with tls syms, and non-tls
11373 relocs are used with non-tls syms. */
11374 if (r_symndx != 0
11375 && r_type != R_PPC64_NONE
11376 && (h == NULL
11377 || h->elf.root.type == bfd_link_hash_defined
11378 || h->elf.root.type == bfd_link_hash_defweak)
11379 && (IS_PPC64_TLS_RELOC (r_type)
11380 != (sym_type == STT_TLS
11381 || (sym_type == STT_SECTION
11382 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11383 {
11384 if (tls_mask != 0
11385 && (r_type == R_PPC64_TLS
11386 || r_type == R_PPC64_TLSGD
11387 || r_type == R_PPC64_TLSLD))
11388 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11389 ;
11390 else
11391 (*_bfd_error_handler)
11392 (!IS_PPC64_TLS_RELOC (r_type)
11393 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11394 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11395 input_bfd,
11396 input_section,
11397 (long) rel->r_offset,
11398 ppc64_elf_howto_table[r_type]->name,
11399 sym_name);
11400 }
11401
11402 /* Ensure reloc mapping code below stays sane. */
11403 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11404 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11405 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11406 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11407 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11408 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11409 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11410 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11411 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11412 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11413 abort ();
11414
11415 switch (r_type)
11416 {
11417 default:
11418 break;
11419
11420 case R_PPC64_TOC16:
11421 case R_PPC64_TOC16_LO:
11422 case R_PPC64_TOC16_DS:
11423 case R_PPC64_TOC16_LO_DS:
11424 {
11425 /* Check for toc tls entries. */
11426 unsigned char *toc_tls;
11427 int retval;
11428
11429 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11430 &local_syms, rel, input_bfd);
11431 if (retval == 0)
11432 return FALSE;
11433
11434 if (toc_tls)
11435 {
11436 tls_mask = *toc_tls;
11437 if (r_type == R_PPC64_TOC16_DS
11438 || r_type == R_PPC64_TOC16_LO_DS)
11439 {
11440 if (tls_mask != 0
11441 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11442 goto toctprel;
11443 }
11444 else
11445 {
11446 /* If we found a GD reloc pair, then we might be
11447 doing a GD->IE transition. */
11448 if (retval == 2)
11449 {
11450 tls_gd = TLS_TPRELGD;
11451 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11452 goto tls_ldgd_opt;
11453 }
11454 else if (retval == 3)
11455 {
11456 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11457 goto tls_ldgd_opt;
11458 }
11459 }
11460 }
11461 }
11462 break;
11463
11464 case R_PPC64_GOT_TPREL16_DS:
11465 case R_PPC64_GOT_TPREL16_LO_DS:
11466 if (tls_mask != 0
11467 && (tls_mask & TLS_TPREL) == 0)
11468 {
11469 toctprel:
11470 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11471 insn &= 31 << 21;
11472 insn |= 0x3c0d0000; /* addis 0,13,0 */
11473 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11474 r_type = R_PPC64_TPREL16_HA;
11475 if (toc_symndx != 0)
11476 {
11477 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11478 rel->r_addend = toc_addend;
11479 /* We changed the symbol. Start over in order to
11480 get h, sym, sec etc. right. */
11481 rel--;
11482 continue;
11483 }
11484 else
11485 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11486 }
11487 break;
11488
11489 case R_PPC64_TLS:
11490 if (tls_mask != 0
11491 && (tls_mask & TLS_TPREL) == 0)
11492 {
11493 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11494 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11495 if (insn == 0)
11496 abort ();
11497 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11498 /* Was PPC64_TLS which sits on insn boundary, now
11499 PPC64_TPREL16_LO which is at low-order half-word. */
11500 rel->r_offset += d_offset;
11501 r_type = R_PPC64_TPREL16_LO;
11502 if (toc_symndx != 0)
11503 {
11504 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11505 rel->r_addend = toc_addend;
11506 /* We changed the symbol. Start over in order to
11507 get h, sym, sec etc. right. */
11508 rel--;
11509 continue;
11510 }
11511 else
11512 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11513 }
11514 break;
11515
11516 case R_PPC64_GOT_TLSGD16_HI:
11517 case R_PPC64_GOT_TLSGD16_HA:
11518 tls_gd = TLS_TPRELGD;
11519 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11520 goto tls_gdld_hi;
11521 break;
11522
11523 case R_PPC64_GOT_TLSLD16_HI:
11524 case R_PPC64_GOT_TLSLD16_HA:
11525 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11526 {
11527 tls_gdld_hi:
11528 if ((tls_mask & tls_gd) != 0)
11529 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11530 + R_PPC64_GOT_TPREL16_DS);
11531 else
11532 {
11533 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11534 rel->r_offset -= d_offset;
11535 r_type = R_PPC64_NONE;
11536 }
11537 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11538 }
11539 break;
11540
11541 case R_PPC64_GOT_TLSGD16:
11542 case R_PPC64_GOT_TLSGD16_LO:
11543 tls_gd = TLS_TPRELGD;
11544 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11545 goto tls_ldgd_opt;
11546 break;
11547
11548 case R_PPC64_GOT_TLSLD16:
11549 case R_PPC64_GOT_TLSLD16_LO:
11550 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11551 {
11552 unsigned int insn1, insn2, insn3;
11553 bfd_vma offset;
11554
11555 tls_ldgd_opt:
11556 offset = (bfd_vma) -1;
11557 /* If not using the newer R_PPC64_TLSGD/LD to mark
11558 __tls_get_addr calls, we must trust that the call
11559 stays with its arg setup insns, ie. that the next
11560 reloc is the __tls_get_addr call associated with
11561 the current reloc. Edit both insns. */
11562 if (input_section->has_tls_get_addr_call
11563 && rel + 1 < relend
11564 && branch_reloc_hash_match (input_bfd, rel + 1,
11565 htab->tls_get_addr,
11566 htab->tls_get_addr_fd))
11567 offset = rel[1].r_offset;
11568 if ((tls_mask & tls_gd) != 0)
11569 {
11570 /* IE */
11571 insn1 = bfd_get_32 (output_bfd,
11572 contents + rel->r_offset - d_offset);
11573 insn1 &= (1 << 26) - (1 << 2);
11574 insn1 |= 58 << 26; /* ld */
11575 insn2 = 0x7c636a14; /* add 3,3,13 */
11576 if (offset != (bfd_vma) -1)
11577 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11578 if ((tls_mask & TLS_EXPLICIT) == 0)
11579 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11580 + R_PPC64_GOT_TPREL16_DS);
11581 else
11582 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11583 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11584 }
11585 else
11586 {
11587 /* LE */
11588 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11589 insn2 = 0x38630000; /* addi 3,3,0 */
11590 if (tls_gd == 0)
11591 {
11592 /* Was an LD reloc. */
11593 if (toc_symndx)
11594 sec = local_sections[toc_symndx];
11595 for (r_symndx = 0;
11596 r_symndx < symtab_hdr->sh_info;
11597 r_symndx++)
11598 if (local_sections[r_symndx] == sec)
11599 break;
11600 if (r_symndx >= symtab_hdr->sh_info)
11601 r_symndx = 0;
11602 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11603 if (r_symndx != 0)
11604 rel->r_addend -= (local_syms[r_symndx].st_value
11605 + sec->output_offset
11606 + sec->output_section->vma);
11607 }
11608 else if (toc_symndx != 0)
11609 {
11610 r_symndx = toc_symndx;
11611 rel->r_addend = toc_addend;
11612 }
11613 r_type = R_PPC64_TPREL16_HA;
11614 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11615 if (offset != (bfd_vma) -1)
11616 {
11617 rel[1].r_info = ELF64_R_INFO (r_symndx,
11618 R_PPC64_TPREL16_LO);
11619 rel[1].r_offset = offset + d_offset;
11620 rel[1].r_addend = rel->r_addend;
11621 }
11622 }
11623 bfd_put_32 (output_bfd, insn1,
11624 contents + rel->r_offset - d_offset);
11625 if (offset != (bfd_vma) -1)
11626 {
11627 insn3 = bfd_get_32 (output_bfd,
11628 contents + offset + 4);
11629 if (insn3 == NOP
11630 || insn3 == CROR_151515 || insn3 == CROR_313131)
11631 {
11632 rel[1].r_offset += 4;
11633 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11634 insn2 = NOP;
11635 }
11636 bfd_put_32 (output_bfd, insn2, contents + offset);
11637 }
11638 if ((tls_mask & tls_gd) == 0
11639 && (tls_gd == 0 || toc_symndx != 0))
11640 {
11641 /* We changed the symbol. Start over in order
11642 to get h, sym, sec etc. right. */
11643 rel--;
11644 continue;
11645 }
11646 }
11647 break;
11648
11649 case R_PPC64_TLSGD:
11650 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11651 {
11652 unsigned int insn2, insn3;
11653 bfd_vma offset = rel->r_offset;
11654
11655 if ((tls_mask & TLS_TPRELGD) != 0)
11656 {
11657 /* IE */
11658 r_type = R_PPC64_NONE;
11659 insn2 = 0x7c636a14; /* add 3,3,13 */
11660 }
11661 else
11662 {
11663 /* LE */
11664 if (toc_symndx != 0)
11665 {
11666 r_symndx = toc_symndx;
11667 rel->r_addend = toc_addend;
11668 }
11669 r_type = R_PPC64_TPREL16_LO;
11670 rel->r_offset = offset + d_offset;
11671 insn2 = 0x38630000; /* addi 3,3,0 */
11672 }
11673 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11674 /* Zap the reloc on the _tls_get_addr call too. */
11675 BFD_ASSERT (offset == rel[1].r_offset);
11676 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11677 insn3 = bfd_get_32 (output_bfd,
11678 contents + offset + 4);
11679 if (insn3 == NOP
11680 || insn3 == CROR_151515 || insn3 == CROR_313131)
11681 {
11682 rel->r_offset += 4;
11683 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11684 insn2 = NOP;
11685 }
11686 bfd_put_32 (output_bfd, insn2, contents + offset);
11687 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11688 {
11689 rel--;
11690 continue;
11691 }
11692 }
11693 break;
11694
11695 case R_PPC64_TLSLD:
11696 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11697 {
11698 unsigned int insn2, insn3;
11699 bfd_vma offset = rel->r_offset;
11700
11701 if (toc_symndx)
11702 sec = local_sections[toc_symndx];
11703 for (r_symndx = 0;
11704 r_symndx < symtab_hdr->sh_info;
11705 r_symndx++)
11706 if (local_sections[r_symndx] == sec)
11707 break;
11708 if (r_symndx >= symtab_hdr->sh_info)
11709 r_symndx = 0;
11710 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11711 if (r_symndx != 0)
11712 rel->r_addend -= (local_syms[r_symndx].st_value
11713 + sec->output_offset
11714 + sec->output_section->vma);
11715
11716 r_type = R_PPC64_TPREL16_LO;
11717 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11718 rel->r_offset = offset + d_offset;
11719 /* Zap the reloc on the _tls_get_addr call too. */
11720 BFD_ASSERT (offset == rel[1].r_offset);
11721 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11722 insn2 = 0x38630000; /* addi 3,3,0 */
11723 insn3 = bfd_get_32 (output_bfd,
11724 contents + offset + 4);
11725 if (insn3 == NOP
11726 || insn3 == CROR_151515 || insn3 == CROR_313131)
11727 {
11728 rel->r_offset += 4;
11729 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11730 insn2 = NOP;
11731 }
11732 bfd_put_32 (output_bfd, insn2, contents + offset);
11733 rel--;
11734 continue;
11735 }
11736 break;
11737
11738 case R_PPC64_DTPMOD64:
11739 if (rel + 1 < relend
11740 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11741 && rel[1].r_offset == rel->r_offset + 8)
11742 {
11743 if ((tls_mask & TLS_GD) == 0)
11744 {
11745 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11746 if ((tls_mask & TLS_TPRELGD) != 0)
11747 r_type = R_PPC64_TPREL64;
11748 else
11749 {
11750 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11751 r_type = R_PPC64_NONE;
11752 }
11753 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11754 }
11755 }
11756 else
11757 {
11758 if ((tls_mask & TLS_LD) == 0)
11759 {
11760 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11761 r_type = R_PPC64_NONE;
11762 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11763 }
11764 }
11765 break;
11766
11767 case R_PPC64_TPREL64:
11768 if ((tls_mask & TLS_TPREL) == 0)
11769 {
11770 r_type = R_PPC64_NONE;
11771 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11772 }
11773 break;
11774 }
11775
11776 /* Handle other relocations that tweak non-addend part of insn. */
11777 insn = 0;
11778 max_br_offset = 1 << 25;
11779 addend = rel->r_addend;
11780 switch (r_type)
11781 {
11782 default:
11783 break;
11784
11785 /* Branch taken prediction relocations. */
11786 case R_PPC64_ADDR14_BRTAKEN:
11787 case R_PPC64_REL14_BRTAKEN:
11788 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11789 /* Fall thru. */
11790
11791 /* Branch not taken prediction relocations. */
11792 case R_PPC64_ADDR14_BRNTAKEN:
11793 case R_PPC64_REL14_BRNTAKEN:
11794 insn |= bfd_get_32 (output_bfd,
11795 contents + rel->r_offset) & ~(0x01 << 21);
11796 /* Fall thru. */
11797
11798 case R_PPC64_REL14:
11799 max_br_offset = 1 << 15;
11800 /* Fall thru. */
11801
11802 case R_PPC64_REL24:
11803 /* Calls to functions with a different TOC, such as calls to
11804 shared objects, need to alter the TOC pointer. This is
11805 done using a linkage stub. A REL24 branching to these
11806 linkage stubs needs to be followed by a nop, as the nop
11807 will be replaced with an instruction to restore the TOC
11808 base pointer. */
11809 stub_entry = NULL;
11810 fdh = h;
11811 if (h != NULL
11812 && h->oh != NULL
11813 && h->oh->is_func_descriptor)
11814 fdh = ppc_follow_link (h->oh);
11815 if (((fdh != NULL
11816 && fdh->elf.plt.plist != NULL)
11817 || (sec != NULL
11818 && sec->output_section != NULL
11819 && sec->id <= htab->top_id
11820 && (htab->stub_group[sec->id].toc_off
11821 != htab->stub_group[input_section->id].toc_off))
11822 || (h == NULL
11823 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11824 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11825 rel, htab)) != NULL
11826 && (stub_entry->stub_type == ppc_stub_plt_call
11827 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11828 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11829 {
11830 bfd_boolean can_plt_call = FALSE;
11831
11832 if (rel->r_offset + 8 <= input_section->size)
11833 {
11834 unsigned long nop;
11835 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11836 if (nop == NOP
11837 || nop == CROR_151515 || nop == CROR_313131)
11838 {
11839 if (h != NULL
11840 && (h == htab->tls_get_addr_fd
11841 || h == htab->tls_get_addr)
11842 && !htab->no_tls_get_addr_opt)
11843 {
11844 /* Special stub used, leave nop alone. */
11845 }
11846 else
11847 bfd_put_32 (input_bfd, LD_R2_40R1,
11848 contents + rel->r_offset + 4);
11849 can_plt_call = TRUE;
11850 }
11851 }
11852
11853 if (!can_plt_call)
11854 {
11855 if (stub_entry->stub_type == ppc_stub_plt_call)
11856 {
11857 /* If this is a plain branch rather than a branch
11858 and link, don't require a nop. However, don't
11859 allow tail calls in a shared library as they
11860 will result in r2 being corrupted. */
11861 unsigned long br;
11862 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11863 if (info->executable && (br & 1) == 0)
11864 can_plt_call = TRUE;
11865 else
11866 stub_entry = NULL;
11867 }
11868 else if (h != NULL
11869 && strcmp (h->elf.root.root.string,
11870 ".__libc_start_main") == 0)
11871 {
11872 /* Allow crt1 branch to go via a toc adjusting stub. */
11873 can_plt_call = TRUE;
11874 }
11875 else
11876 {
11877 if (strcmp (input_section->output_section->name,
11878 ".init") == 0
11879 || strcmp (input_section->output_section->name,
11880 ".fini") == 0)
11881 (*_bfd_error_handler)
11882 (_("%B(%A+0x%lx): automatic multiple TOCs "
11883 "not supported using your crt files; "
11884 "recompile with -mminimal-toc or upgrade gcc"),
11885 input_bfd,
11886 input_section,
11887 (long) rel->r_offset);
11888 else
11889 (*_bfd_error_handler)
11890 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11891 "does not allow automatic multiple TOCs; "
11892 "recompile with -mminimal-toc or "
11893 "-fno-optimize-sibling-calls, "
11894 "or make `%s' extern"),
11895 input_bfd,
11896 input_section,
11897 (long) rel->r_offset,
11898 sym_name,
11899 sym_name);
11900 bfd_set_error (bfd_error_bad_value);
11901 ret = FALSE;
11902 }
11903 }
11904
11905 if (can_plt_call
11906 && stub_entry->stub_type == ppc_stub_plt_call)
11907 unresolved_reloc = FALSE;
11908 }
11909
11910 if (stub_entry == NULL
11911 && get_opd_info (sec) != NULL)
11912 {
11913 /* The branch destination is the value of the opd entry. */
11914 bfd_vma off = (relocation + addend
11915 - sec->output_section->vma
11916 - sec->output_offset);
11917 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11918 if (dest != (bfd_vma) -1)
11919 {
11920 relocation = dest;
11921 addend = 0;
11922 }
11923 }
11924
11925 /* If the branch is out of reach we ought to have a long
11926 branch stub. */
11927 from = (rel->r_offset
11928 + input_section->output_offset
11929 + input_section->output_section->vma);
11930
11931 if (stub_entry == NULL
11932 && (relocation + addend - from + max_br_offset
11933 >= 2 * max_br_offset)
11934 && r_type != R_PPC64_ADDR14_BRTAKEN
11935 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11936 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11937 htab);
11938
11939 if (stub_entry != NULL)
11940 {
11941 /* Munge up the value and addend so that we call the stub
11942 rather than the procedure directly. */
11943 relocation = (stub_entry->stub_offset
11944 + stub_entry->stub_sec->output_offset
11945 + stub_entry->stub_sec->output_section->vma);
11946 addend = 0;
11947 }
11948
11949 if (insn != 0)
11950 {
11951 if (is_power4)
11952 {
11953 /* Set 'a' bit. This is 0b00010 in BO field for branch
11954 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11955 for branch on CTR insns (BO == 1a00t or 1a01t). */
11956 if ((insn & (0x14 << 21)) == (0x04 << 21))
11957 insn |= 0x02 << 21;
11958 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11959 insn |= 0x08 << 21;
11960 else
11961 break;
11962 }
11963 else
11964 {
11965 /* Invert 'y' bit if not the default. */
11966 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11967 insn ^= 0x01 << 21;
11968 }
11969
11970 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11971 }
11972
11973 /* NOP out calls to undefined weak functions.
11974 We can thus call a weak function without first
11975 checking whether the function is defined. */
11976 else if (h != NULL
11977 && h->elf.root.type == bfd_link_hash_undefweak
11978 && h->elf.dynindx == -1
11979 && r_type == R_PPC64_REL24
11980 && relocation == 0
11981 && addend == 0)
11982 {
11983 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11984 continue;
11985 }
11986 break;
11987 }
11988
11989 /* Set `addend'. */
11990 tls_type = 0;
11991 switch (r_type)
11992 {
11993 default:
11994 (*_bfd_error_handler)
11995 (_("%B: unknown relocation type %d for symbol %s"),
11996 input_bfd, (int) r_type, sym_name);
11997
11998 bfd_set_error (bfd_error_bad_value);
11999 ret = FALSE;
12000 continue;
12001
12002 case R_PPC64_NONE:
12003 case R_PPC64_TLS:
12004 case R_PPC64_TLSGD:
12005 case R_PPC64_TLSLD:
12006 case R_PPC64_GNU_VTINHERIT:
12007 case R_PPC64_GNU_VTENTRY:
12008 continue;
12009
12010 /* GOT16 relocations. Like an ADDR16 using the symbol's
12011 address in the GOT as relocation value instead of the
12012 symbol's value itself. Also, create a GOT entry for the
12013 symbol and put the symbol value there. */
12014 case R_PPC64_GOT_TLSGD16:
12015 case R_PPC64_GOT_TLSGD16_LO:
12016 case R_PPC64_GOT_TLSGD16_HI:
12017 case R_PPC64_GOT_TLSGD16_HA:
12018 tls_type = TLS_TLS | TLS_GD;
12019 goto dogot;
12020
12021 case R_PPC64_GOT_TLSLD16:
12022 case R_PPC64_GOT_TLSLD16_LO:
12023 case R_PPC64_GOT_TLSLD16_HI:
12024 case R_PPC64_GOT_TLSLD16_HA:
12025 tls_type = TLS_TLS | TLS_LD;
12026 goto dogot;
12027
12028 case R_PPC64_GOT_TPREL16_DS:
12029 case R_PPC64_GOT_TPREL16_LO_DS:
12030 case R_PPC64_GOT_TPREL16_HI:
12031 case R_PPC64_GOT_TPREL16_HA:
12032 tls_type = TLS_TLS | TLS_TPREL;
12033 goto dogot;
12034
12035 case R_PPC64_GOT_DTPREL16_DS:
12036 case R_PPC64_GOT_DTPREL16_LO_DS:
12037 case R_PPC64_GOT_DTPREL16_HI:
12038 case R_PPC64_GOT_DTPREL16_HA:
12039 tls_type = TLS_TLS | TLS_DTPREL;
12040 goto dogot;
12041
12042 case R_PPC64_GOT16:
12043 case R_PPC64_GOT16_LO:
12044 case R_PPC64_GOT16_HI:
12045 case R_PPC64_GOT16_HA:
12046 case R_PPC64_GOT16_DS:
12047 case R_PPC64_GOT16_LO_DS:
12048 dogot:
12049 {
12050 /* Relocation is to the entry for this symbol in the global
12051 offset table. */
12052 asection *got;
12053 bfd_vma *offp;
12054 bfd_vma off;
12055 unsigned long indx = 0;
12056 struct got_entry *ent;
12057
12058 if (tls_type == (TLS_TLS | TLS_LD)
12059 && (h == NULL
12060 || !h->elf.def_dynamic))
12061 ent = ppc64_tlsld_got (input_bfd);
12062 else
12063 {
12064
12065 if (h != NULL)
12066 {
12067 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12068 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12069 &h->elf)
12070 || (info->shared
12071 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12072 /* This is actually a static link, or it is a
12073 -Bsymbolic link and the symbol is defined
12074 locally, or the symbol was forced to be local
12075 because of a version file. */
12076 ;
12077 else
12078 {
12079 indx = h->elf.dynindx;
12080 unresolved_reloc = FALSE;
12081 }
12082 ent = h->elf.got.glist;
12083 }
12084 else
12085 {
12086 if (local_got_ents == NULL)
12087 abort ();
12088 ent = local_got_ents[r_symndx];
12089 }
12090
12091 for (; ent != NULL; ent = ent->next)
12092 if (ent->addend == orig_addend
12093 && ent->owner == input_bfd
12094 && ent->tls_type == tls_type)
12095 break;
12096 }
12097
12098 if (ent == NULL)
12099 abort ();
12100 if (ent->is_indirect)
12101 ent = ent->got.ent;
12102 offp = &ent->got.offset;
12103 got = ppc64_elf_tdata (ent->owner)->got;
12104 if (got == NULL)
12105 abort ();
12106
12107 /* The offset must always be a multiple of 8. We use the
12108 least significant bit to record whether we have already
12109 processed this entry. */
12110 off = *offp;
12111 if ((off & 1) != 0)
12112 off &= ~1;
12113 else
12114 {
12115 /* Generate relocs for the dynamic linker, except in
12116 the case of TLSLD where we'll use one entry per
12117 module. */
12118 asection *relgot;
12119 bfd_boolean ifunc;
12120
12121 *offp = off | 1;
12122 relgot = NULL;
12123 ifunc = (h != NULL
12124 ? h->elf.type == STT_GNU_IFUNC
12125 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12126 if ((info->shared || indx != 0)
12127 && (h == NULL
12128 || (tls_type == (TLS_TLS | TLS_LD)
12129 && !h->elf.def_dynamic)
12130 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12131 || h->elf.root.type != bfd_link_hash_undefweak))
12132 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12133 else if (ifunc)
12134 relgot = htab->reliplt;
12135 if (relgot != NULL)
12136 {
12137 outrel.r_offset = (got->output_section->vma
12138 + got->output_offset
12139 + off);
12140 outrel.r_addend = addend;
12141 if (tls_type & (TLS_LD | TLS_GD))
12142 {
12143 outrel.r_addend = 0;
12144 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12145 if (tls_type == (TLS_TLS | TLS_GD))
12146 {
12147 loc = relgot->contents;
12148 loc += (relgot->reloc_count++
12149 * sizeof (Elf64_External_Rela));
12150 bfd_elf64_swap_reloca_out (output_bfd,
12151 &outrel, loc);
12152 outrel.r_offset += 8;
12153 outrel.r_addend = addend;
12154 outrel.r_info
12155 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12156 }
12157 }
12158 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12159 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12160 else if (tls_type == (TLS_TLS | TLS_TPREL))
12161 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12162 else if (indx != 0)
12163 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12164 else
12165 {
12166 if (ifunc)
12167 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12168 else
12169 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12170
12171 /* Write the .got section contents for the sake
12172 of prelink. */
12173 loc = got->contents + off;
12174 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12175 loc);
12176 }
12177
12178 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12179 {
12180 outrel.r_addend += relocation;
12181 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12182 outrel.r_addend -= htab->elf.tls_sec->vma;
12183 }
12184 loc = relgot->contents;
12185 loc += (relgot->reloc_count++
12186 * sizeof (Elf64_External_Rela));
12187 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12188 }
12189
12190 /* Init the .got section contents here if we're not
12191 emitting a reloc. */
12192 else
12193 {
12194 relocation += addend;
12195 if (tls_type == (TLS_TLS | TLS_LD))
12196 relocation = 1;
12197 else if (tls_type != 0)
12198 {
12199 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12200 if (tls_type == (TLS_TLS | TLS_TPREL))
12201 relocation += DTP_OFFSET - TP_OFFSET;
12202
12203 if (tls_type == (TLS_TLS | TLS_GD))
12204 {
12205 bfd_put_64 (output_bfd, relocation,
12206 got->contents + off + 8);
12207 relocation = 1;
12208 }
12209 }
12210
12211 bfd_put_64 (output_bfd, relocation,
12212 got->contents + off);
12213 }
12214 }
12215
12216 if (off >= (bfd_vma) -2)
12217 abort ();
12218
12219 relocation = got->output_section->vma + got->output_offset + off;
12220 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12221 }
12222 break;
12223
12224 case R_PPC64_PLT16_HA:
12225 case R_PPC64_PLT16_HI:
12226 case R_PPC64_PLT16_LO:
12227 case R_PPC64_PLT32:
12228 case R_PPC64_PLT64:
12229 /* Relocation is to the entry for this symbol in the
12230 procedure linkage table. */
12231
12232 /* Resolve a PLT reloc against a local symbol directly,
12233 without using the procedure linkage table. */
12234 if (h == NULL)
12235 break;
12236
12237 /* It's possible that we didn't make a PLT entry for this
12238 symbol. This happens when statically linking PIC code,
12239 or when using -Bsymbolic. Go find a match if there is a
12240 PLT entry. */
12241 if (htab->plt != NULL)
12242 {
12243 struct plt_entry *ent;
12244 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12245 if (ent->addend == orig_addend
12246 && ent->plt.offset != (bfd_vma) -1)
12247 {
12248 relocation = (htab->plt->output_section->vma
12249 + htab->plt->output_offset
12250 + ent->plt.offset);
12251 unresolved_reloc = FALSE;
12252 }
12253 }
12254 break;
12255
12256 case R_PPC64_TOC:
12257 /* Relocation value is TOC base. */
12258 relocation = TOCstart;
12259 if (r_symndx == 0)
12260 relocation += htab->stub_group[input_section->id].toc_off;
12261 else if (unresolved_reloc)
12262 ;
12263 else if (sec != NULL && sec->id <= htab->top_id)
12264 relocation += htab->stub_group[sec->id].toc_off;
12265 else
12266 unresolved_reloc = TRUE;
12267 goto dodyn;
12268
12269 /* TOC16 relocs. We want the offset relative to the TOC base,
12270 which is the address of the start of the TOC plus 0x8000.
12271 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12272 in this order. */
12273 case R_PPC64_TOC16:
12274 case R_PPC64_TOC16_LO:
12275 case R_PPC64_TOC16_HI:
12276 case R_PPC64_TOC16_DS:
12277 case R_PPC64_TOC16_LO_DS:
12278 case R_PPC64_TOC16_HA:
12279 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12280 break;
12281
12282 /* Relocate against the beginning of the section. */
12283 case R_PPC64_SECTOFF:
12284 case R_PPC64_SECTOFF_LO:
12285 case R_PPC64_SECTOFF_HI:
12286 case R_PPC64_SECTOFF_DS:
12287 case R_PPC64_SECTOFF_LO_DS:
12288 case R_PPC64_SECTOFF_HA:
12289 if (sec != NULL)
12290 addend -= sec->output_section->vma;
12291 break;
12292
12293 case R_PPC64_REL16:
12294 case R_PPC64_REL16_LO:
12295 case R_PPC64_REL16_HI:
12296 case R_PPC64_REL16_HA:
12297 break;
12298
12299 case R_PPC64_REL14:
12300 case R_PPC64_REL14_BRNTAKEN:
12301 case R_PPC64_REL14_BRTAKEN:
12302 case R_PPC64_REL24:
12303 break;
12304
12305 case R_PPC64_TPREL16:
12306 case R_PPC64_TPREL16_LO:
12307 case R_PPC64_TPREL16_HI:
12308 case R_PPC64_TPREL16_HA:
12309 case R_PPC64_TPREL16_DS:
12310 case R_PPC64_TPREL16_LO_DS:
12311 case R_PPC64_TPREL16_HIGHER:
12312 case R_PPC64_TPREL16_HIGHERA:
12313 case R_PPC64_TPREL16_HIGHEST:
12314 case R_PPC64_TPREL16_HIGHESTA:
12315 if (h != NULL
12316 && h->elf.root.type == bfd_link_hash_undefweak
12317 && h->elf.dynindx == -1)
12318 {
12319 /* Make this relocation against an undefined weak symbol
12320 resolve to zero. This is really just a tweak, since
12321 code using weak externs ought to check that they are
12322 defined before using them. */
12323 bfd_byte *p = contents + rel->r_offset - d_offset;
12324
12325 insn = bfd_get_32 (output_bfd, p);
12326 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12327 if (insn != 0)
12328 bfd_put_32 (output_bfd, insn, p);
12329 break;
12330 }
12331 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12332 if (info->shared)
12333 /* The TPREL16 relocs shouldn't really be used in shared
12334 libs as they will result in DT_TEXTREL being set, but
12335 support them anyway. */
12336 goto dodyn;
12337 break;
12338
12339 case R_PPC64_DTPREL16:
12340 case R_PPC64_DTPREL16_LO:
12341 case R_PPC64_DTPREL16_HI:
12342 case R_PPC64_DTPREL16_HA:
12343 case R_PPC64_DTPREL16_DS:
12344 case R_PPC64_DTPREL16_LO_DS:
12345 case R_PPC64_DTPREL16_HIGHER:
12346 case R_PPC64_DTPREL16_HIGHERA:
12347 case R_PPC64_DTPREL16_HIGHEST:
12348 case R_PPC64_DTPREL16_HIGHESTA:
12349 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12350 break;
12351
12352 case R_PPC64_DTPMOD64:
12353 relocation = 1;
12354 addend = 0;
12355 goto dodyn;
12356
12357 case R_PPC64_TPREL64:
12358 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12359 goto dodyn;
12360
12361 case R_PPC64_DTPREL64:
12362 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12363 /* Fall thru */
12364
12365 /* Relocations that may need to be propagated if this is a
12366 dynamic object. */
12367 case R_PPC64_REL30:
12368 case R_PPC64_REL32:
12369 case R_PPC64_REL64:
12370 case R_PPC64_ADDR14:
12371 case R_PPC64_ADDR14_BRNTAKEN:
12372 case R_PPC64_ADDR14_BRTAKEN:
12373 case R_PPC64_ADDR16:
12374 case R_PPC64_ADDR16_DS:
12375 case R_PPC64_ADDR16_HA:
12376 case R_PPC64_ADDR16_HI:
12377 case R_PPC64_ADDR16_HIGHER:
12378 case R_PPC64_ADDR16_HIGHERA:
12379 case R_PPC64_ADDR16_HIGHEST:
12380 case R_PPC64_ADDR16_HIGHESTA:
12381 case R_PPC64_ADDR16_LO:
12382 case R_PPC64_ADDR16_LO_DS:
12383 case R_PPC64_ADDR24:
12384 case R_PPC64_ADDR32:
12385 case R_PPC64_ADDR64:
12386 case R_PPC64_UADDR16:
12387 case R_PPC64_UADDR32:
12388 case R_PPC64_UADDR64:
12389 dodyn:
12390 if ((input_section->flags & SEC_ALLOC) == 0)
12391 break;
12392
12393 if (NO_OPD_RELOCS && is_opd)
12394 break;
12395
12396 if ((info->shared
12397 && (h == NULL
12398 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12399 || h->elf.root.type != bfd_link_hash_undefweak)
12400 && (must_be_dyn_reloc (info, r_type)
12401 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12402 || (ELIMINATE_COPY_RELOCS
12403 && !info->shared
12404 && h != NULL
12405 && h->elf.dynindx != -1
12406 && !h->elf.non_got_ref
12407 && !h->elf.def_regular)
12408 || (!info->shared
12409 && (h != NULL
12410 ? h->elf.type == STT_GNU_IFUNC
12411 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12412 {
12413 bfd_boolean skip, relocate;
12414 asection *sreloc;
12415 bfd_vma out_off;
12416
12417 /* When generating a dynamic object, these relocations
12418 are copied into the output file to be resolved at run
12419 time. */
12420
12421 skip = FALSE;
12422 relocate = FALSE;
12423
12424 out_off = _bfd_elf_section_offset (output_bfd, info,
12425 input_section, rel->r_offset);
12426 if (out_off == (bfd_vma) -1)
12427 skip = TRUE;
12428 else if (out_off == (bfd_vma) -2)
12429 skip = TRUE, relocate = TRUE;
12430 out_off += (input_section->output_section->vma
12431 + input_section->output_offset);
12432 outrel.r_offset = out_off;
12433 outrel.r_addend = rel->r_addend;
12434
12435 /* Optimize unaligned reloc use. */
12436 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12437 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12438 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12439 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12440 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12441 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12442 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12443 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12444 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12445
12446 if (skip)
12447 memset (&outrel, 0, sizeof outrel);
12448 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12449 && !is_opd
12450 && r_type != R_PPC64_TOC)
12451 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12452 else
12453 {
12454 /* This symbol is local, or marked to become local,
12455 or this is an opd section reloc which must point
12456 at a local function. */
12457 outrel.r_addend += relocation;
12458 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12459 {
12460 if (is_opd && h != NULL)
12461 {
12462 /* Lie about opd entries. This case occurs
12463 when building shared libraries and we
12464 reference a function in another shared
12465 lib. The same thing happens for a weak
12466 definition in an application that's
12467 overridden by a strong definition in a
12468 shared lib. (I believe this is a generic
12469 bug in binutils handling of weak syms.)
12470 In these cases we won't use the opd
12471 entry in this lib. */
12472 unresolved_reloc = FALSE;
12473 }
12474 if (!is_opd
12475 && r_type == R_PPC64_ADDR64
12476 && (h != NULL
12477 ? h->elf.type == STT_GNU_IFUNC
12478 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12479 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12480 else
12481 {
12482 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12483
12484 /* We need to relocate .opd contents for ld.so.
12485 Prelink also wants simple and consistent rules
12486 for relocs. This make all RELATIVE relocs have
12487 *r_offset equal to r_addend. */
12488 relocate = TRUE;
12489 }
12490 }
12491 else
12492 {
12493 long indx = 0;
12494
12495 if (h != NULL
12496 ? h->elf.type == STT_GNU_IFUNC
12497 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12498 {
12499 (*_bfd_error_handler)
12500 (_("%B(%A+0x%lx): relocation %s for indirect "
12501 "function %s unsupported"),
12502 input_bfd,
12503 input_section,
12504 (long) rel->r_offset,
12505 ppc64_elf_howto_table[r_type]->name,
12506 sym_name);
12507 ret = FALSE;
12508 }
12509 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12510 ;
12511 else if (sec == NULL || sec->owner == NULL)
12512 {
12513 bfd_set_error (bfd_error_bad_value);
12514 return FALSE;
12515 }
12516 else
12517 {
12518 asection *osec;
12519
12520 osec = sec->output_section;
12521 indx = elf_section_data (osec)->dynindx;
12522
12523 if (indx == 0)
12524 {
12525 if ((osec->flags & SEC_READONLY) == 0
12526 && htab->elf.data_index_section != NULL)
12527 osec = htab->elf.data_index_section;
12528 else
12529 osec = htab->elf.text_index_section;
12530 indx = elf_section_data (osec)->dynindx;
12531 }
12532 BFD_ASSERT (indx != 0);
12533
12534 /* We are turning this relocation into one
12535 against a section symbol, so subtract out
12536 the output section's address but not the
12537 offset of the input section in the output
12538 section. */
12539 outrel.r_addend -= osec->vma;
12540 }
12541
12542 outrel.r_info = ELF64_R_INFO (indx, r_type);
12543 }
12544 }
12545
12546 sreloc = elf_section_data (input_section)->sreloc;
12547 if (!htab->elf.dynamic_sections_created)
12548 sreloc = htab->reliplt;
12549 if (sreloc == NULL)
12550 abort ();
12551
12552 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12553 >= sreloc->size)
12554 abort ();
12555 loc = sreloc->contents;
12556 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12557 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12558
12559 /* If this reloc is against an external symbol, it will
12560 be computed at runtime, so there's no need to do
12561 anything now. However, for the sake of prelink ensure
12562 that the section contents are a known value. */
12563 if (! relocate)
12564 {
12565 unresolved_reloc = FALSE;
12566 /* The value chosen here is quite arbitrary as ld.so
12567 ignores section contents except for the special
12568 case of .opd where the contents might be accessed
12569 before relocation. Choose zero, as that won't
12570 cause reloc overflow. */
12571 relocation = 0;
12572 addend = 0;
12573 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12574 to improve backward compatibility with older
12575 versions of ld. */
12576 if (r_type == R_PPC64_ADDR64)
12577 addend = outrel.r_addend;
12578 /* Adjust pc_relative relocs to have zero in *r_offset. */
12579 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12580 addend = (input_section->output_section->vma
12581 + input_section->output_offset
12582 + rel->r_offset);
12583 }
12584 }
12585 break;
12586
12587 case R_PPC64_COPY:
12588 case R_PPC64_GLOB_DAT:
12589 case R_PPC64_JMP_SLOT:
12590 case R_PPC64_JMP_IREL:
12591 case R_PPC64_RELATIVE:
12592 /* We shouldn't ever see these dynamic relocs in relocatable
12593 files. */
12594 /* Fall through. */
12595
12596 case R_PPC64_PLTGOT16:
12597 case R_PPC64_PLTGOT16_DS:
12598 case R_PPC64_PLTGOT16_HA:
12599 case R_PPC64_PLTGOT16_HI:
12600 case R_PPC64_PLTGOT16_LO:
12601 case R_PPC64_PLTGOT16_LO_DS:
12602 case R_PPC64_PLTREL32:
12603 case R_PPC64_PLTREL64:
12604 /* These ones haven't been implemented yet. */
12605
12606 (*_bfd_error_handler)
12607 (_("%B: relocation %s is not supported for symbol %s."),
12608 input_bfd,
12609 ppc64_elf_howto_table[r_type]->name, sym_name);
12610
12611 bfd_set_error (bfd_error_invalid_operation);
12612 ret = FALSE;
12613 continue;
12614 }
12615
12616 /* Do any further special processing. */
12617 switch (r_type)
12618 {
12619 default:
12620 break;
12621
12622 case R_PPC64_ADDR16_HA:
12623 case R_PPC64_REL16_HA:
12624 case R_PPC64_ADDR16_HIGHERA:
12625 case R_PPC64_ADDR16_HIGHESTA:
12626 case R_PPC64_TOC16_HA:
12627 case R_PPC64_SECTOFF_HA:
12628 case R_PPC64_TPREL16_HA:
12629 case R_PPC64_DTPREL16_HA:
12630 case R_PPC64_TPREL16_HIGHER:
12631 case R_PPC64_TPREL16_HIGHERA:
12632 case R_PPC64_TPREL16_HIGHEST:
12633 case R_PPC64_TPREL16_HIGHESTA:
12634 case R_PPC64_DTPREL16_HIGHER:
12635 case R_PPC64_DTPREL16_HIGHERA:
12636 case R_PPC64_DTPREL16_HIGHEST:
12637 case R_PPC64_DTPREL16_HIGHESTA:
12638 /* It's just possible that this symbol is a weak symbol
12639 that's not actually defined anywhere. In that case,
12640 'sec' would be NULL, and we should leave the symbol
12641 alone (it will be set to zero elsewhere in the link). */
12642 if (sec == NULL)
12643 break;
12644 /* Fall thru */
12645
12646 case R_PPC64_GOT16_HA:
12647 case R_PPC64_PLTGOT16_HA:
12648 case R_PPC64_PLT16_HA:
12649 case R_PPC64_GOT_TLSGD16_HA:
12650 case R_PPC64_GOT_TLSLD16_HA:
12651 case R_PPC64_GOT_TPREL16_HA:
12652 case R_PPC64_GOT_DTPREL16_HA:
12653 /* Add 0x10000 if sign bit in 0:15 is set.
12654 Bits 0:15 are not used. */
12655 addend += 0x8000;
12656 break;
12657
12658 case R_PPC64_ADDR16_DS:
12659 case R_PPC64_ADDR16_LO_DS:
12660 case R_PPC64_GOT16_DS:
12661 case R_PPC64_GOT16_LO_DS:
12662 case R_PPC64_PLT16_LO_DS:
12663 case R_PPC64_SECTOFF_DS:
12664 case R_PPC64_SECTOFF_LO_DS:
12665 case R_PPC64_TOC16_DS:
12666 case R_PPC64_TOC16_LO_DS:
12667 case R_PPC64_PLTGOT16_DS:
12668 case R_PPC64_PLTGOT16_LO_DS:
12669 case R_PPC64_GOT_TPREL16_DS:
12670 case R_PPC64_GOT_TPREL16_LO_DS:
12671 case R_PPC64_GOT_DTPREL16_DS:
12672 case R_PPC64_GOT_DTPREL16_LO_DS:
12673 case R_PPC64_TPREL16_DS:
12674 case R_PPC64_TPREL16_LO_DS:
12675 case R_PPC64_DTPREL16_DS:
12676 case R_PPC64_DTPREL16_LO_DS:
12677 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12678 mask = 3;
12679 /* If this reloc is against an lq insn, then the value must be
12680 a multiple of 16. This is somewhat of a hack, but the
12681 "correct" way to do this by defining _DQ forms of all the
12682 _DS relocs bloats all reloc switches in this file. It
12683 doesn't seem to make much sense to use any of these relocs
12684 in data, so testing the insn should be safe. */
12685 if ((insn & (0x3f << 26)) == (56u << 26))
12686 mask = 15;
12687 if (((relocation + addend) & mask) != 0)
12688 {
12689 (*_bfd_error_handler)
12690 (_("%B: error: relocation %s not a multiple of %d"),
12691 input_bfd,
12692 ppc64_elf_howto_table[r_type]->name,
12693 mask + 1);
12694 bfd_set_error (bfd_error_bad_value);
12695 ret = FALSE;
12696 continue;
12697 }
12698 break;
12699 }
12700
12701 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12702 because such sections are not SEC_ALLOC and thus ld.so will
12703 not process them. */
12704 if (unresolved_reloc
12705 && !((input_section->flags & SEC_DEBUGGING) != 0
12706 && h->elf.def_dynamic))
12707 {
12708 (*_bfd_error_handler)
12709 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12710 input_bfd,
12711 input_section,
12712 (long) rel->r_offset,
12713 ppc64_elf_howto_table[(int) r_type]->name,
12714 h->elf.root.root.string);
12715 ret = FALSE;
12716 }
12717
12718 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12719 input_bfd,
12720 input_section,
12721 contents,
12722 rel->r_offset,
12723 relocation,
12724 addend);
12725
12726 if (r != bfd_reloc_ok)
12727 {
12728 if (sym_name == NULL)
12729 sym_name = "(null)";
12730 if (r == bfd_reloc_overflow)
12731 {
12732 if (warned)
12733 continue;
12734 if (h != NULL
12735 && h->elf.root.type == bfd_link_hash_undefweak
12736 && ppc64_elf_howto_table[r_type]->pc_relative)
12737 {
12738 /* Assume this is a call protected by other code that
12739 detects the symbol is undefined. If this is the case,
12740 we can safely ignore the overflow. If not, the
12741 program is hosed anyway, and a little warning isn't
12742 going to help. */
12743
12744 continue;
12745 }
12746
12747 if (!((*info->callbacks->reloc_overflow)
12748 (info, (h ? &h->elf.root : NULL), sym_name,
12749 ppc64_elf_howto_table[r_type]->name,
12750 orig_addend, input_bfd, input_section, rel->r_offset)))
12751 return FALSE;
12752 }
12753 else
12754 {
12755 (*_bfd_error_handler)
12756 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12757 input_bfd,
12758 input_section,
12759 (long) rel->r_offset,
12760 ppc64_elf_howto_table[r_type]->name,
12761 sym_name,
12762 (int) r);
12763 ret = FALSE;
12764 }
12765 }
12766 }
12767
12768 /* If we're emitting relocations, then shortly after this function
12769 returns, reloc offsets and addends for this section will be
12770 adjusted. Worse, reloc symbol indices will be for the output
12771 file rather than the input. Save a copy of the relocs for
12772 opd_entry_value. */
12773 if (is_opd && (info->emitrelocations || info->relocatable))
12774 {
12775 bfd_size_type amt;
12776 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12777 rel = bfd_alloc (input_bfd, amt);
12778 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12779 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12780 if (rel == NULL)
12781 return FALSE;
12782 memcpy (rel, relocs, amt);
12783 }
12784 return ret;
12785 }
12786
12787 /* Adjust the value of any local symbols in opd sections. */
12788
12789 static int
12790 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12791 const char *name ATTRIBUTE_UNUSED,
12792 Elf_Internal_Sym *elfsym,
12793 asection *input_sec,
12794 struct elf_link_hash_entry *h)
12795 {
12796 struct _opd_sec_data *opd;
12797 long adjust;
12798 bfd_vma value;
12799
12800 if (h != NULL)
12801 return 1;
12802
12803 opd = get_opd_info (input_sec);
12804 if (opd == NULL || opd->adjust == NULL)
12805 return 1;
12806
12807 value = elfsym->st_value - input_sec->output_offset;
12808 if (!info->relocatable)
12809 value -= input_sec->output_section->vma;
12810
12811 adjust = opd->adjust[value / 8];
12812 if (adjust == -1)
12813 return 2;
12814
12815 elfsym->st_value += adjust;
12816 return 1;
12817 }
12818
12819 /* Finish up dynamic symbol handling. We set the contents of various
12820 dynamic sections here. */
12821
12822 static bfd_boolean
12823 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12824 struct bfd_link_info *info,
12825 struct elf_link_hash_entry *h,
12826 Elf_Internal_Sym *sym)
12827 {
12828 struct ppc_link_hash_table *htab;
12829 struct plt_entry *ent;
12830 Elf_Internal_Rela rela;
12831 bfd_byte *loc;
12832
12833 htab = ppc_hash_table (info);
12834 if (htab == NULL)
12835 return FALSE;
12836
12837 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12838 if (ent->plt.offset != (bfd_vma) -1)
12839 {
12840 /* This symbol has an entry in the procedure linkage
12841 table. Set it up. */
12842 if (!htab->elf.dynamic_sections_created
12843 || h->dynindx == -1)
12844 {
12845 BFD_ASSERT (h->type == STT_GNU_IFUNC
12846 && h->def_regular
12847 && (h->root.type == bfd_link_hash_defined
12848 || h->root.type == bfd_link_hash_defweak));
12849 rela.r_offset = (htab->iplt->output_section->vma
12850 + htab->iplt->output_offset
12851 + ent->plt.offset);
12852 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12853 rela.r_addend = (h->root.u.def.value
12854 + h->root.u.def.section->output_offset
12855 + h->root.u.def.section->output_section->vma
12856 + ent->addend);
12857 loc = (htab->reliplt->contents
12858 + (htab->reliplt->reloc_count++
12859 * sizeof (Elf64_External_Rela)));
12860 }
12861 else
12862 {
12863 rela.r_offset = (htab->plt->output_section->vma
12864 + htab->plt->output_offset
12865 + ent->plt.offset);
12866 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12867 rela.r_addend = ent->addend;
12868 loc = (htab->relplt->contents
12869 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12870 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12871 }
12872 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12873 }
12874
12875 if (h->needs_copy)
12876 {
12877 /* This symbol needs a copy reloc. Set it up. */
12878
12879 if (h->dynindx == -1
12880 || (h->root.type != bfd_link_hash_defined
12881 && h->root.type != bfd_link_hash_defweak)
12882 || htab->relbss == NULL)
12883 abort ();
12884
12885 rela.r_offset = (h->root.u.def.value
12886 + h->root.u.def.section->output_section->vma
12887 + h->root.u.def.section->output_offset);
12888 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12889 rela.r_addend = 0;
12890 loc = htab->relbss->contents;
12891 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12892 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12893 }
12894
12895 /* Mark some specially defined symbols as absolute. */
12896 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12897 sym->st_shndx = SHN_ABS;
12898
12899 return TRUE;
12900 }
12901
12902 /* Used to decide how to sort relocs in an optimal manner for the
12903 dynamic linker, before writing them out. */
12904
12905 static enum elf_reloc_type_class
12906 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12907 {
12908 enum elf_ppc64_reloc_type r_type;
12909
12910 r_type = ELF64_R_TYPE (rela->r_info);
12911 switch (r_type)
12912 {
12913 case R_PPC64_RELATIVE:
12914 return reloc_class_relative;
12915 case R_PPC64_JMP_SLOT:
12916 return reloc_class_plt;
12917 case R_PPC64_COPY:
12918 return reloc_class_copy;
12919 default:
12920 return reloc_class_normal;
12921 }
12922 }
12923
12924 /* Finish up the dynamic sections. */
12925
12926 static bfd_boolean
12927 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12928 struct bfd_link_info *info)
12929 {
12930 struct ppc_link_hash_table *htab;
12931 bfd *dynobj;
12932 asection *sdyn;
12933
12934 htab = ppc_hash_table (info);
12935 if (htab == NULL)
12936 return FALSE;
12937
12938 dynobj = htab->elf.dynobj;
12939 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12940
12941 if (htab->elf.dynamic_sections_created)
12942 {
12943 Elf64_External_Dyn *dyncon, *dynconend;
12944
12945 if (sdyn == NULL || htab->got == NULL)
12946 abort ();
12947
12948 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12949 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12950 for (; dyncon < dynconend; dyncon++)
12951 {
12952 Elf_Internal_Dyn dyn;
12953 asection *s;
12954
12955 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12956
12957 switch (dyn.d_tag)
12958 {
12959 default:
12960 continue;
12961
12962 case DT_PPC64_GLINK:
12963 s = htab->glink;
12964 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12965 /* We stupidly defined DT_PPC64_GLINK to be the start
12966 of glink rather than the first entry point, which is
12967 what ld.so needs, and now have a bigger stub to
12968 support automatic multiple TOCs. */
12969 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12970 break;
12971
12972 case DT_PPC64_OPD:
12973 s = bfd_get_section_by_name (output_bfd, ".opd");
12974 if (s == NULL)
12975 continue;
12976 dyn.d_un.d_ptr = s->vma;
12977 break;
12978
12979 case DT_PPC64_OPDSZ:
12980 s = bfd_get_section_by_name (output_bfd, ".opd");
12981 if (s == NULL)
12982 continue;
12983 dyn.d_un.d_val = s->size;
12984 break;
12985
12986 case DT_PLTGOT:
12987 s = htab->plt;
12988 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12989 break;
12990
12991 case DT_JMPREL:
12992 s = htab->relplt;
12993 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12994 break;
12995
12996 case DT_PLTRELSZ:
12997 dyn.d_un.d_val = htab->relplt->size;
12998 break;
12999
13000 case DT_RELASZ:
13001 /* Don't count procedure linkage table relocs in the
13002 overall reloc count. */
13003 s = htab->relplt;
13004 if (s == NULL)
13005 continue;
13006 dyn.d_un.d_val -= s->size;
13007 break;
13008
13009 case DT_RELA:
13010 /* We may not be using the standard ELF linker script.
13011 If .rela.plt is the first .rela section, we adjust
13012 DT_RELA to not include it. */
13013 s = htab->relplt;
13014 if (s == NULL)
13015 continue;
13016 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13017 continue;
13018 dyn.d_un.d_ptr += s->size;
13019 break;
13020 }
13021
13022 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13023 }
13024 }
13025
13026 if (htab->got != NULL && htab->got->size != 0)
13027 {
13028 /* Fill in the first entry in the global offset table.
13029 We use it to hold the link-time TOCbase. */
13030 bfd_put_64 (output_bfd,
13031 elf_gp (output_bfd) + TOC_BASE_OFF,
13032 htab->got->contents);
13033
13034 /* Set .got entry size. */
13035 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13036 }
13037
13038 if (htab->plt != NULL && htab->plt->size != 0)
13039 {
13040 /* Set .plt entry size. */
13041 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13042 = PLT_ENTRY_SIZE;
13043 }
13044
13045 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13046 brlt ourselves if emitrelocations. */
13047 if (htab->brlt != NULL
13048 && htab->brlt->reloc_count != 0
13049 && !_bfd_elf_link_output_relocs (output_bfd,
13050 htab->brlt,
13051 &elf_section_data (htab->brlt)->rel_hdr,
13052 elf_section_data (htab->brlt)->relocs,
13053 NULL))
13054 return FALSE;
13055
13056 if (htab->glink != NULL
13057 && htab->glink->reloc_count != 0
13058 && !_bfd_elf_link_output_relocs (output_bfd,
13059 htab->glink,
13060 &elf_section_data (htab->glink)->rel_hdr,
13061 elf_section_data (htab->glink)->relocs,
13062 NULL))
13063 return FALSE;
13064
13065 /* We need to handle writing out multiple GOT sections ourselves,
13066 since we didn't add them to DYNOBJ. We know dynobj is the first
13067 bfd. */
13068 while ((dynobj = dynobj->link_next) != NULL)
13069 {
13070 asection *s;
13071
13072 if (!is_ppc64_elf (dynobj))
13073 continue;
13074
13075 s = ppc64_elf_tdata (dynobj)->got;
13076 if (s != NULL
13077 && s->size != 0
13078 && s->output_section != bfd_abs_section_ptr
13079 && !bfd_set_section_contents (output_bfd, s->output_section,
13080 s->contents, s->output_offset,
13081 s->size))
13082 return FALSE;
13083 s = ppc64_elf_tdata (dynobj)->relgot;
13084 if (s != NULL
13085 && s->size != 0
13086 && s->output_section != bfd_abs_section_ptr
13087 && !bfd_set_section_contents (output_bfd, s->output_section,
13088 s->contents, s->output_offset,
13089 s->size))
13090 return FALSE;
13091 }
13092
13093 return TRUE;
13094 }
13095
13096 #include "elf64-target.h"