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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 /* Track GOT entries needed for a given symbol. We might need more
2530 than one got entry per symbol. */
2531 struct got_entry
2532 {
2533 struct got_entry *next;
2534
2535 /* The symbol addend that we'll be placing in the GOT. */
2536 bfd_vma addend;
2537
2538 /* Unlike other ELF targets, we use separate GOT entries for the same
2539 symbol referenced from different input files. This is to support
2540 automatic multiple TOC/GOT sections, where the TOC base can vary
2541 from one input file to another. After partitioning into TOC groups
2542 we merge entries within the group.
2543
2544 Point to the BFD owning this GOT entry. */
2545 bfd *owner;
2546
2547 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2548 TLS_TPREL or TLS_DTPREL for tls entries. */
2549 char tls_type;
2550
2551 /* Non-zero if got.ent points to real entry. */
2552 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
2597 #define ppc64_elf_tdata(bfd) \
2598 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2599
2600 #define ppc64_tlsld_got(bfd) \
2601 (&ppc64_elf_tdata (bfd)->tlsld_got)
2602
2603 #define is_ppc64_elf(bfd) \
2604 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2605 && elf_object_id (bfd) == PPC64_ELF_DATA)
2606
2607 /* Override the generic function because we store some extras. */
2608
2609 static bfd_boolean
2610 ppc64_elf_mkobject (bfd *abfd)
2611 {
2612 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2613 PPC64_ELF_DATA);
2614 }
2615
2616 /* Fix bad default arch selected for a 64 bit input bfd when the
2617 default is 32 bit. */
2618
2619 static bfd_boolean
2620 ppc64_elf_object_p (bfd *abfd)
2621 {
2622 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2623 {
2624 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2625
2626 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2627 {
2628 /* Relies on arch after 32 bit default being 64 bit default. */
2629 abfd->arch_info = abfd->arch_info->next;
2630 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2631 }
2632 }
2633 return TRUE;
2634 }
2635
2636 /* Support for core dump NOTE sections. */
2637
2638 static bfd_boolean
2639 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2640 {
2641 size_t offset, size;
2642
2643 if (note->descsz != 504)
2644 return FALSE;
2645
2646 /* pr_cursig */
2647 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2648
2649 /* pr_pid */
2650 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2651
2652 /* pr_reg */
2653 offset = 112;
2654 size = 384;
2655
2656 /* Make a ".reg/999" section. */
2657 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2658 size, note->descpos + offset);
2659 }
2660
2661 static bfd_boolean
2662 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2663 {
2664 if (note->descsz != 136)
2665 return FALSE;
2666
2667 elf_tdata (abfd)->core_program
2668 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2669 elf_tdata (abfd)->core_command
2670 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2671
2672 return TRUE;
2673 }
2674
2675 static char *
2676 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2677 ...)
2678 {
2679 switch (note_type)
2680 {
2681 default:
2682 return NULL;
2683
2684 case NT_PRPSINFO:
2685 {
2686 char data[136];
2687 va_list ap;
2688
2689 va_start (ap, note_type);
2690 memset (data, 0, 40);
2691 strncpy (data + 40, va_arg (ap, const char *), 16);
2692 strncpy (data + 56, va_arg (ap, const char *), 80);
2693 va_end (ap);
2694 return elfcore_write_note (abfd, buf, bufsiz,
2695 "CORE", note_type, data, sizeof (data));
2696 }
2697
2698 case NT_PRSTATUS:
2699 {
2700 char data[504];
2701 va_list ap;
2702 long pid;
2703 int cursig;
2704 const void *greg;
2705
2706 va_start (ap, note_type);
2707 memset (data, 0, 112);
2708 pid = va_arg (ap, long);
2709 bfd_put_32 (abfd, pid, data + 32);
2710 cursig = va_arg (ap, int);
2711 bfd_put_16 (abfd, cursig, data + 12);
2712 greg = va_arg (ap, const void *);
2713 memcpy (data + 112, greg, 384);
2714 memset (data + 496, 0, 8);
2715 va_end (ap);
2716 return elfcore_write_note (abfd, buf, bufsiz,
2717 "CORE", note_type, data, sizeof (data));
2718 }
2719 }
2720 }
2721
2722 /* Merge backend specific data from an object file to the output
2723 object file when linking. */
2724
2725 static bfd_boolean
2726 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2727 {
2728 /* Check if we have the same endianess. */
2729 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2730 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2731 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2732 {
2733 const char *msg;
2734
2735 if (bfd_big_endian (ibfd))
2736 msg = _("%B: compiled for a big endian system "
2737 "and target is little endian");
2738 else
2739 msg = _("%B: compiled for a little endian system "
2740 "and target is big endian");
2741
2742 (*_bfd_error_handler) (msg, ibfd);
2743
2744 bfd_set_error (bfd_error_wrong_format);
2745 return FALSE;
2746 }
2747
2748 return TRUE;
2749 }
2750
2751 /* Add extra PPC sections. */
2752
2753 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2754 {
2755 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2756 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2757 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2758 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2759 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2760 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2761 { NULL, 0, 0, 0, 0 }
2762 };
2763
2764 enum _ppc64_sec_type {
2765 sec_normal = 0,
2766 sec_opd = 1,
2767 sec_toc = 2
2768 };
2769
2770 struct _ppc64_elf_section_data
2771 {
2772 struct bfd_elf_section_data elf;
2773
2774 union
2775 {
2776 /* An array with one entry for each opd function descriptor. */
2777 struct _opd_sec_data
2778 {
2779 /* Points to the function code section for local opd entries. */
2780 asection **func_sec;
2781
2782 /* After editing .opd, adjust references to opd local syms. */
2783 long *adjust;
2784 } opd;
2785
2786 /* An array for toc sections, indexed by offset/8. */
2787 struct _toc_sec_data
2788 {
2789 /* Specifies the relocation symbol index used at a given toc offset. */
2790 unsigned *symndx;
2791
2792 /* And the relocation addend. */
2793 bfd_vma *add;
2794 } toc;
2795 } u;
2796
2797 enum _ppc64_sec_type sec_type:2;
2798
2799 /* Flag set when small branches are detected. Used to
2800 select suitable defaults for the stub group size. */
2801 unsigned int has_14bit_branch:1;
2802 };
2803
2804 #define ppc64_elf_section_data(sec) \
2805 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2806
2807 static bfd_boolean
2808 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2809 {
2810 if (!sec->used_by_bfd)
2811 {
2812 struct _ppc64_elf_section_data *sdata;
2813 bfd_size_type amt = sizeof (*sdata);
2814
2815 sdata = bfd_zalloc (abfd, amt);
2816 if (sdata == NULL)
2817 return FALSE;
2818 sec->used_by_bfd = sdata;
2819 }
2820
2821 return _bfd_elf_new_section_hook (abfd, sec);
2822 }
2823
2824 static struct _opd_sec_data *
2825 get_opd_info (asection * sec)
2826 {
2827 if (sec != NULL
2828 && ppc64_elf_section_data (sec) != NULL
2829 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2830 return &ppc64_elf_section_data (sec)->u.opd;
2831 return NULL;
2832 }
2833 \f
2834 /* Parameters for the qsort hook. */
2835 static bfd_boolean synthetic_relocatable;
2836
2837 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2838
2839 static int
2840 compare_symbols (const void *ap, const void *bp)
2841 {
2842 const asymbol *a = * (const asymbol **) ap;
2843 const asymbol *b = * (const asymbol **) bp;
2844
2845 /* Section symbols first. */
2846 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2847 return -1;
2848 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2849 return 1;
2850
2851 /* then .opd symbols. */
2852 if (strcmp (a->section->name, ".opd") == 0
2853 && strcmp (b->section->name, ".opd") != 0)
2854 return -1;
2855 if (strcmp (a->section->name, ".opd") != 0
2856 && strcmp (b->section->name, ".opd") == 0)
2857 return 1;
2858
2859 /* then other code symbols. */
2860 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2861 == (SEC_CODE | SEC_ALLOC)
2862 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2863 != (SEC_CODE | SEC_ALLOC))
2864 return -1;
2865
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 == (SEC_CODE | SEC_ALLOC))
2870 return 1;
2871
2872 if (synthetic_relocatable)
2873 {
2874 if (a->section->id < b->section->id)
2875 return -1;
2876
2877 if (a->section->id > b->section->id)
2878 return 1;
2879 }
2880
2881 if (a->value + a->section->vma < b->value + b->section->vma)
2882 return -1;
2883
2884 if (a->value + a->section->vma > b->value + b->section->vma)
2885 return 1;
2886
2887 /* For syms with the same value, prefer strong dynamic global function
2888 syms over other syms. */
2889 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2890 return -1;
2891
2892 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2893 return 1;
2894
2895 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2911 return 1;
2912
2913 return 0;
2914 }
2915
2916 /* Search SYMS for a symbol of the given VALUE. */
2917
2918 static asymbol *
2919 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2920 {
2921 long mid;
2922
2923 if (id == -1)
2924 {
2925 while (lo < hi)
2926 {
2927 mid = (lo + hi) >> 1;
2928 if (syms[mid]->value + syms[mid]->section->vma < value)
2929 lo = mid + 1;
2930 else if (syms[mid]->value + syms[mid]->section->vma > value)
2931 hi = mid;
2932 else
2933 return syms[mid];
2934 }
2935 }
2936 else
2937 {
2938 while (lo < hi)
2939 {
2940 mid = (lo + hi) >> 1;
2941 if (syms[mid]->section->id < id)
2942 lo = mid + 1;
2943 else if (syms[mid]->section->id > id)
2944 hi = mid;
2945 else if (syms[mid]->value < value)
2946 lo = mid + 1;
2947 else if (syms[mid]->value > value)
2948 hi = mid;
2949 else
2950 return syms[mid];
2951 }
2952 }
2953 return NULL;
2954 }
2955
2956 static bfd_boolean
2957 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2958 {
2959 bfd_vma vma = *(bfd_vma *) ptr;
2960 return ((section->flags & SEC_ALLOC) != 0
2961 && section->vma <= vma
2962 && vma < section->vma + section->size);
2963 }
2964
2965 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2966 entry syms. Also generate @plt symbols for the glink branch table. */
2967
2968 static long
2969 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2970 long static_count, asymbol **static_syms,
2971 long dyn_count, asymbol **dyn_syms,
2972 asymbol **ret)
2973 {
2974 asymbol *s;
2975 long i;
2976 long count;
2977 char *names;
2978 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2979 asection *opd;
2980 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2981 asymbol **syms;
2982
2983 *ret = NULL;
2984
2985 opd = bfd_get_section_by_name (abfd, ".opd");
2986 if (opd == NULL)
2987 return 0;
2988
2989 symcount = static_count;
2990 if (!relocatable)
2991 symcount += dyn_count;
2992 if (symcount == 0)
2993 return 0;
2994
2995 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2996 if (syms == NULL)
2997 return -1;
2998
2999 if (!relocatable && static_count != 0 && dyn_count != 0)
3000 {
3001 /* Use both symbol tables. */
3002 memcpy (syms, static_syms, static_count * sizeof (*syms));
3003 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3004 }
3005 else if (!relocatable && static_count == 0)
3006 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3007 else
3008 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3009
3010 synthetic_relocatable = relocatable;
3011 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3012
3013 if (!relocatable && symcount > 1)
3014 {
3015 long j;
3016 /* Trim duplicate syms, since we may have merged the normal and
3017 dynamic symbols. Actually, we only care about syms that have
3018 different values, so trim any with the same value. */
3019 for (i = 1, j = 1; i < symcount; ++i)
3020 if (syms[i - 1]->value + syms[i - 1]->section->vma
3021 != syms[i]->value + syms[i]->section->vma)
3022 syms[j++] = syms[i];
3023 symcount = j;
3024 }
3025
3026 i = 0;
3027 if (strcmp (syms[i]->section->name, ".opd") == 0)
3028 ++i;
3029 codesecsym = i;
3030
3031 for (; i < symcount; ++i)
3032 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3033 != (SEC_CODE | SEC_ALLOC))
3034 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3035 break;
3036 codesecsymend = i;
3037
3038 for (; i < symcount; ++i)
3039 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3040 break;
3041 secsymend = i;
3042
3043 for (; i < symcount; ++i)
3044 if (strcmp (syms[i]->section->name, ".opd") != 0)
3045 break;
3046 opdsymend = i;
3047
3048 for (; i < symcount; ++i)
3049 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3050 != (SEC_CODE | SEC_ALLOC))
3051 break;
3052 symcount = i;
3053
3054 count = 0;
3055
3056 if (relocatable)
3057 {
3058 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3059 arelent *r;
3060 size_t size;
3061 long relcount;
3062
3063 if (opdsymend == secsymend)
3064 goto done;
3065
3066 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3067 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3068 if (relcount == 0)
3069 goto done;
3070
3071 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3072 {
3073 count = -1;
3074 goto done;
3075 }
3076
3077 size = 0;
3078 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3079 {
3080 asymbol *sym;
3081
3082 while (r < opd->relocation + relcount
3083 && r->address < syms[i]->value + opd->vma)
3084 ++r;
3085
3086 if (r == opd->relocation + relcount)
3087 break;
3088
3089 if (r->address != syms[i]->value + opd->vma)
3090 continue;
3091
3092 if (r->howto->type != R_PPC64_ADDR64)
3093 continue;
3094
3095 sym = *r->sym_ptr_ptr;
3096 if (!sym_exists_at (syms, opdsymend, symcount,
3097 sym->section->id, sym->value + r->addend))
3098 {
3099 ++count;
3100 size += sizeof (asymbol);
3101 size += strlen (syms[i]->name) + 2;
3102 }
3103 }
3104
3105 s = *ret = bfd_malloc (size);
3106 if (s == NULL)
3107 {
3108 count = -1;
3109 goto done;
3110 }
3111
3112 names = (char *) (s + count);
3113
3114 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3115 {
3116 asymbol *sym;
3117
3118 while (r < opd->relocation + relcount
3119 && r->address < syms[i]->value + opd->vma)
3120 ++r;
3121
3122 if (r == opd->relocation + relcount)
3123 break;
3124
3125 if (r->address != syms[i]->value + opd->vma)
3126 continue;
3127
3128 if (r->howto->type != R_PPC64_ADDR64)
3129 continue;
3130
3131 sym = *r->sym_ptr_ptr;
3132 if (!sym_exists_at (syms, opdsymend, symcount,
3133 sym->section->id, sym->value + r->addend))
3134 {
3135 size_t len;
3136
3137 *s = *syms[i];
3138 s->flags |= BSF_SYNTHETIC;
3139 s->section = sym->section;
3140 s->value = sym->value + r->addend;
3141 s->name = names;
3142 *names++ = '.';
3143 len = strlen (syms[i]->name);
3144 memcpy (names, syms[i]->name, len + 1);
3145 names += len + 1;
3146 /* Have udata.p point back to the original symbol this
3147 synthetic symbol was derived from. */
3148 s->udata.p = syms[i];
3149 s++;
3150 }
3151 }
3152 }
3153 else
3154 {
3155 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3156 bfd_byte *contents;
3157 size_t size;
3158 long plt_count = 0;
3159 bfd_vma glink_vma = 0, resolv_vma = 0;
3160 asection *dynamic, *glink = NULL, *relplt = NULL;
3161 arelent *p;
3162
3163 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3164 {
3165 if (contents)
3166 {
3167 free_contents_and_exit:
3168 free (contents);
3169 }
3170 count = -1;
3171 goto done;
3172 }
3173
3174 size = 0;
3175 for (i = secsymend; i < opdsymend; ++i)
3176 {
3177 bfd_vma ent;
3178
3179 /* Ignore bogus symbols. */
3180 if (syms[i]->value > opd->size - 8)
3181 continue;
3182
3183 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3184 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3185 {
3186 ++count;
3187 size += sizeof (asymbol);
3188 size += strlen (syms[i]->name) + 2;
3189 }
3190 }
3191
3192 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3193 if (dyn_count != 0
3194 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3195 {
3196 bfd_byte *dynbuf, *extdyn, *extdynend;
3197 size_t extdynsize;
3198 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3199
3200 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3201 goto free_contents_and_exit;
3202
3203 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3204 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3205
3206 extdyn = dynbuf;
3207 extdynend = extdyn + dynamic->size;
3208 for (; extdyn < extdynend; extdyn += extdynsize)
3209 {
3210 Elf_Internal_Dyn dyn;
3211 (*swap_dyn_in) (abfd, extdyn, &dyn);
3212
3213 if (dyn.d_tag == DT_NULL)
3214 break;
3215
3216 if (dyn.d_tag == DT_PPC64_GLINK)
3217 {
3218 /* The first glink stub starts at offset 32; see comment in
3219 ppc64_elf_finish_dynamic_sections. */
3220 glink_vma = dyn.d_un.d_val + 32;
3221 /* The .glink section usually does not survive the final
3222 link; search for the section (usually .text) where the
3223 glink stubs now reside. */
3224 glink = bfd_sections_find_if (abfd, section_covers_vma,
3225 &glink_vma);
3226 break;
3227 }
3228 }
3229
3230 free (dynbuf);
3231 }
3232
3233 if (glink != NULL)
3234 {
3235 /* Determine __glink trampoline by reading the relative branch
3236 from the first glink stub. */
3237 bfd_byte buf[4];
3238 if (bfd_get_section_contents (abfd, glink, buf,
3239 glink_vma + 4 - glink->vma, 4))
3240 {
3241 unsigned int insn = bfd_get_32 (abfd, buf);
3242 insn ^= B_DOT;
3243 if ((insn & ~0x3fffffc) == 0)
3244 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3245 }
3246
3247 if (resolv_vma)
3248 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3249
3250 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3251 if (relplt != NULL)
3252 {
3253 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3254 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3255 goto free_contents_and_exit;
3256
3257 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3258 size += plt_count * sizeof (asymbol);
3259
3260 p = relplt->relocation;
3261 for (i = 0; i < plt_count; i++, p++)
3262 {
3263 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3264 if (p->addend != 0)
3265 size += sizeof ("+0x") - 1 + 16;
3266 }
3267 }
3268 }
3269
3270 s = *ret = bfd_malloc (size);
3271 if (s == NULL)
3272 goto free_contents_and_exit;
3273
3274 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3275
3276 for (i = secsymend; i < opdsymend; ++i)
3277 {
3278 bfd_vma ent;
3279
3280 if (syms[i]->value > opd->size - 8)
3281 continue;
3282
3283 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3284 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3285 {
3286 long lo, hi;
3287 size_t len;
3288 asection *sec = abfd->sections;
3289
3290 *s = *syms[i];
3291 lo = codesecsym;
3292 hi = codesecsymend;
3293 while (lo < hi)
3294 {
3295 long mid = (lo + hi) >> 1;
3296 if (syms[mid]->section->vma < ent)
3297 lo = mid + 1;
3298 else if (syms[mid]->section->vma > ent)
3299 hi = mid;
3300 else
3301 {
3302 sec = syms[mid]->section;
3303 break;
3304 }
3305 }
3306
3307 if (lo >= hi && lo > codesecsym)
3308 sec = syms[lo - 1]->section;
3309
3310 for (; sec != NULL; sec = sec->next)
3311 {
3312 if (sec->vma > ent)
3313 break;
3314 if ((sec->flags & SEC_ALLOC) == 0
3315 || (sec->flags & SEC_LOAD) == 0)
3316 break;
3317 if ((sec->flags & SEC_CODE) != 0)
3318 s->section = sec;
3319 }
3320 s->flags |= BSF_SYNTHETIC;
3321 s->value = ent - s->section->vma;
3322 s->name = names;
3323 *names++ = '.';
3324 len = strlen (syms[i]->name);
3325 memcpy (names, syms[i]->name, len + 1);
3326 names += len + 1;
3327 /* Have udata.p point back to the original symbol this
3328 synthetic symbol was derived from. */
3329 s->udata.p = syms[i];
3330 s++;
3331 }
3332 }
3333 free (contents);
3334
3335 if (glink != NULL && relplt != NULL)
3336 {
3337 if (resolv_vma)
3338 {
3339 /* Add a symbol for the main glink trampoline. */
3340 memset (s, 0, sizeof *s);
3341 s->the_bfd = abfd;
3342 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3343 s->section = glink;
3344 s->value = resolv_vma - glink->vma;
3345 s->name = names;
3346 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3347 names += sizeof ("__glink_PLTresolve");
3348 s++;
3349 count++;
3350 }
3351
3352 /* FIXME: It would be very much nicer to put sym@plt on the
3353 stub rather than on the glink branch table entry. The
3354 objdump disassembler would then use a sensible symbol
3355 name on plt calls. The difficulty in doing so is
3356 a) finding the stubs, and,
3357 b) matching stubs against plt entries, and,
3358 c) there can be multiple stubs for a given plt entry.
3359
3360 Solving (a) could be done by code scanning, but older
3361 ppc64 binaries used different stubs to current code.
3362 (b) is the tricky one since you need to known the toc
3363 pointer for at least one function that uses a pic stub to
3364 be able to calculate the plt address referenced.
3365 (c) means gdb would need to set multiple breakpoints (or
3366 find the glink branch itself) when setting breakpoints
3367 for pending shared library loads. */
3368 p = relplt->relocation;
3369 for (i = 0; i < plt_count; i++, p++)
3370 {
3371 size_t len;
3372
3373 *s = **p->sym_ptr_ptr;
3374 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3375 we are defining a symbol, ensure one of them is set. */
3376 if ((s->flags & BSF_LOCAL) == 0)
3377 s->flags |= BSF_GLOBAL;
3378 s->flags |= BSF_SYNTHETIC;
3379 s->section = glink;
3380 s->value = glink_vma - glink->vma;
3381 s->name = names;
3382 s->udata.p = NULL;
3383 len = strlen ((*p->sym_ptr_ptr)->name);
3384 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3385 names += len;
3386 if (p->addend != 0)
3387 {
3388 memcpy (names, "+0x", sizeof ("+0x") - 1);
3389 names += sizeof ("+0x") - 1;
3390 bfd_sprintf_vma (abfd, names, p->addend);
3391 names += strlen (names);
3392 }
3393 memcpy (names, "@plt", sizeof ("@plt"));
3394 names += sizeof ("@plt");
3395 s++;
3396 glink_vma += 8;
3397 if (i >= 0x8000)
3398 glink_vma += 4;
3399 }
3400 count += plt_count;
3401 }
3402 }
3403
3404 done:
3405 free (syms);
3406 return count;
3407 }
3408 \f
3409 /* The following functions are specific to the ELF linker, while
3410 functions above are used generally. Those named ppc64_elf_* are
3411 called by the main ELF linker code. They appear in this file more
3412 or less in the order in which they are called. eg.
3413 ppc64_elf_check_relocs is called early in the link process,
3414 ppc64_elf_finish_dynamic_sections is one of the last functions
3415 called.
3416
3417 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3418 functions have both a function code symbol and a function descriptor
3419 symbol. A call to foo in a relocatable object file looks like:
3420
3421 . .text
3422 . x:
3423 . bl .foo
3424 . nop
3425
3426 The function definition in another object file might be:
3427
3428 . .section .opd
3429 . foo: .quad .foo
3430 . .quad .TOC.@tocbase
3431 . .quad 0
3432 .
3433 . .text
3434 . .foo: blr
3435
3436 When the linker resolves the call during a static link, the branch
3437 unsurprisingly just goes to .foo and the .opd information is unused.
3438 If the function definition is in a shared library, things are a little
3439 different: The call goes via a plt call stub, the opd information gets
3440 copied to the plt, and the linker patches the nop.
3441
3442 . x:
3443 . bl .foo_stub
3444 . ld 2,40(1)
3445 .
3446 .
3447 . .foo_stub:
3448 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3449 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3450 . std 2,40(1) # this is the general idea
3451 . ld 11,0(12)
3452 . ld 2,8(12)
3453 . mtctr 11
3454 . ld 11,16(12)
3455 . bctr
3456 .
3457 . .section .plt
3458 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3459
3460 The "reloc ()" notation is supposed to indicate that the linker emits
3461 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3462 copying.
3463
3464 What are the difficulties here? Well, firstly, the relocations
3465 examined by the linker in check_relocs are against the function code
3466 sym .foo, while the dynamic relocation in the plt is emitted against
3467 the function descriptor symbol, foo. Somewhere along the line, we need
3468 to carefully copy dynamic link information from one symbol to the other.
3469 Secondly, the generic part of the elf linker will make .foo a dynamic
3470 symbol as is normal for most other backends. We need foo dynamic
3471 instead, at least for an application final link. However, when
3472 creating a shared library containing foo, we need to have both symbols
3473 dynamic so that references to .foo are satisfied during the early
3474 stages of linking. Otherwise the linker might decide to pull in a
3475 definition from some other object, eg. a static library.
3476
3477 Update: As of August 2004, we support a new convention. Function
3478 calls may use the function descriptor symbol, ie. "bl foo". This
3479 behaves exactly as "bl .foo". */
3480
3481 /* The linker needs to keep track of the number of relocs that it
3482 decides to copy as dynamic relocs in check_relocs for each symbol.
3483 This is so that it can later discard them if they are found to be
3484 unnecessary. We store the information in a field extending the
3485 regular ELF linker hash table. */
3486
3487 struct ppc_dyn_relocs
3488 {
3489 struct ppc_dyn_relocs *next;
3490
3491 /* The input section of the reloc. */
3492 asection *sec;
3493
3494 /* Total number of relocs copied for the input section. */
3495 bfd_size_type count;
3496
3497 /* Number of pc-relative relocs copied for the input section. */
3498 bfd_size_type pc_count;
3499 };
3500
3501 /* Of those relocs that might be copied as dynamic relocs, this function
3502 selects those that must be copied when linking a shared library,
3503 even when the symbol is local. */
3504
3505 static int
3506 must_be_dyn_reloc (struct bfd_link_info *info,
3507 enum elf_ppc64_reloc_type r_type)
3508 {
3509 switch (r_type)
3510 {
3511 default:
3512 return 1;
3513
3514 case R_PPC64_REL32:
3515 case R_PPC64_REL64:
3516 case R_PPC64_REL30:
3517 return 0;
3518
3519 case R_PPC64_TPREL16:
3520 case R_PPC64_TPREL16_LO:
3521 case R_PPC64_TPREL16_HI:
3522 case R_PPC64_TPREL16_HA:
3523 case R_PPC64_TPREL16_DS:
3524 case R_PPC64_TPREL16_LO_DS:
3525 case R_PPC64_TPREL16_HIGHER:
3526 case R_PPC64_TPREL16_HIGHERA:
3527 case R_PPC64_TPREL16_HIGHEST:
3528 case R_PPC64_TPREL16_HIGHESTA:
3529 case R_PPC64_TPREL64:
3530 return !info->executable;
3531 }
3532 }
3533
3534 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3535 copying dynamic variables from a shared lib into an app's dynbss
3536 section, and instead use a dynamic relocation to point into the
3537 shared lib. With code that gcc generates, it's vital that this be
3538 enabled; In the PowerPC64 ABI, the address of a function is actually
3539 the address of a function descriptor, which resides in the .opd
3540 section. gcc uses the descriptor directly rather than going via the
3541 GOT as some other ABI's do, which means that initialized function
3542 pointers must reference the descriptor. Thus, a function pointer
3543 initialized to the address of a function in a shared library will
3544 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3545 redefines the function descriptor symbol to point to the copy. This
3546 presents a problem as a plt entry for that function is also
3547 initialized from the function descriptor symbol and the copy reloc
3548 may not be initialized first. */
3549 #define ELIMINATE_COPY_RELOCS 1
3550
3551 /* Section name for stubs is the associated section name plus this
3552 string. */
3553 #define STUB_SUFFIX ".stub"
3554
3555 /* Linker stubs.
3556 ppc_stub_long_branch:
3557 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3558 destination, but a 24 bit branch in a stub section will reach.
3559 . b dest
3560
3561 ppc_stub_plt_branch:
3562 Similar to the above, but a 24 bit branch in the stub section won't
3563 reach its destination.
3564 . addis %r12,%r2,xxx@toc@ha
3565 . ld %r11,xxx@toc@l(%r12)
3566 . mtctr %r11
3567 . bctr
3568
3569 ppc_stub_plt_call:
3570 Used to call a function in a shared library. If it so happens that
3571 the plt entry referenced crosses a 64k boundary, then an extra
3572 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3573 . addis %r12,%r2,xxx@toc@ha
3574 . std %r2,40(%r1)
3575 . ld %r11,xxx+0@toc@l(%r12)
3576 . mtctr %r11
3577 . ld %r2,xxx+8@toc@l(%r12)
3578 . ld %r11,xxx+16@toc@l(%r12)
3579 . bctr
3580
3581 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3582 code to adjust the value and save r2 to support multiple toc sections.
3583 A ppc_stub_long_branch with an r2 offset looks like:
3584 . std %r2,40(%r1)
3585 . addis %r2,%r2,off@ha
3586 . addi %r2,%r2,off@l
3587 . b dest
3588
3589 A ppc_stub_plt_branch with an r2 offset looks like:
3590 . std %r2,40(%r1)
3591 . addis %r12,%r2,xxx@toc@ha
3592 . ld %r11,xxx@toc@l(%r12)
3593 . addis %r2,%r2,off@ha
3594 . addi %r2,%r2,off@l
3595 . mtctr %r11
3596 . bctr
3597
3598 In cases where the "addis" instruction would add zero, the "addis" is
3599 omitted and following instructions modified slightly in some cases.
3600 */
3601
3602 enum ppc_stub_type {
3603 ppc_stub_none,
3604 ppc_stub_long_branch,
3605 ppc_stub_long_branch_r2off,
3606 ppc_stub_plt_branch,
3607 ppc_stub_plt_branch_r2off,
3608 ppc_stub_plt_call
3609 };
3610
3611 struct ppc_stub_hash_entry {
3612
3613 /* Base hash table entry structure. */
3614 struct bfd_hash_entry root;
3615
3616 enum ppc_stub_type stub_type;
3617
3618 /* The stub section. */
3619 asection *stub_sec;
3620
3621 /* Offset within stub_sec of the beginning of this stub. */
3622 bfd_vma stub_offset;
3623
3624 /* Given the symbol's value and its section we can determine its final
3625 value when building the stubs (so the stub knows where to jump. */
3626 bfd_vma target_value;
3627 asection *target_section;
3628
3629 /* The symbol table entry, if any, that this was derived from. */
3630 struct ppc_link_hash_entry *h;
3631 struct plt_entry *plt_ent;
3632
3633 /* And the reloc addend that this was derived from. */
3634 bfd_vma addend;
3635
3636 /* Where this stub is being called from, or, in the case of combined
3637 stub sections, the first input section in the group. */
3638 asection *id_sec;
3639 };
3640
3641 struct ppc_branch_hash_entry {
3642
3643 /* Base hash table entry structure. */
3644 struct bfd_hash_entry root;
3645
3646 /* Offset within branch lookup table. */
3647 unsigned int offset;
3648
3649 /* Generation marker. */
3650 unsigned int iter;
3651 };
3652
3653 struct ppc_link_hash_entry
3654 {
3655 struct elf_link_hash_entry elf;
3656
3657 union {
3658 /* A pointer to the most recently used stub hash entry against this
3659 symbol. */
3660 struct ppc_stub_hash_entry *stub_cache;
3661
3662 /* A pointer to the next symbol starting with a '.' */
3663 struct ppc_link_hash_entry *next_dot_sym;
3664 } u;
3665
3666 /* Track dynamic relocs copied for this symbol. */
3667 struct ppc_dyn_relocs *dyn_relocs;
3668
3669 /* Link between function code and descriptor symbols. */
3670 struct ppc_link_hash_entry *oh;
3671
3672 /* Flag function code and descriptor symbols. */
3673 unsigned int is_func:1;
3674 unsigned int is_func_descriptor:1;
3675 unsigned int fake:1;
3676
3677 /* Whether global opd/toc sym has been adjusted or not.
3678 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3679 should be set for all globals defined in any opd/toc section. */
3680 unsigned int adjust_done:1;
3681
3682 /* Set if we twiddled this symbol to weak at some stage. */
3683 unsigned int was_undefined:1;
3684
3685 /* Contexts in which symbol is used in the GOT (or TOC).
3686 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3687 corresponding relocs are encountered during check_relocs.
3688 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3689 indicate the corresponding GOT entry type is not needed.
3690 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3691 a TPREL one. We use a separate flag rather than setting TPREL
3692 just for convenience in distinguishing the two cases. */
3693 #define TLS_GD 1 /* GD reloc. */
3694 #define TLS_LD 2 /* LD reloc. */
3695 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3696 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3697 #define TLS_TLS 16 /* Any TLS reloc. */
3698 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3699 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3700 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3701 char tls_mask;
3702 };
3703
3704 /* ppc64 ELF linker hash table. */
3705
3706 struct ppc_link_hash_table
3707 {
3708 struct elf_link_hash_table elf;
3709
3710 /* The stub hash table. */
3711 struct bfd_hash_table stub_hash_table;
3712
3713 /* Another hash table for plt_branch stubs. */
3714 struct bfd_hash_table branch_hash_table;
3715
3716 /* Linker stub bfd. */
3717 bfd *stub_bfd;
3718
3719 /* Linker call-backs. */
3720 asection * (*add_stub_section) (const char *, asection *);
3721 void (*layout_sections_again) (void);
3722
3723 /* Array to keep track of which stub sections have been created, and
3724 information on stub grouping. */
3725 struct map_stub {
3726 /* This is the section to which stubs in the group will be attached. */
3727 asection *link_sec;
3728 /* The stub section. */
3729 asection *stub_sec;
3730 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3731 bfd_vma toc_off;
3732 } *stub_group;
3733
3734 /* Temp used when calculating TOC pointers. */
3735 bfd_vma toc_curr;
3736 bfd *toc_bfd;
3737 asection *toc_first_sec;
3738
3739 /* Highest input section id. */
3740 int top_id;
3741
3742 /* Highest output section index. */
3743 int top_index;
3744
3745 /* Used when adding symbols. */
3746 struct ppc_link_hash_entry *dot_syms;
3747
3748 /* List of input sections for each output section. */
3749 asection **input_list;
3750
3751 /* Short-cuts to get to dynamic linker sections. */
3752 asection *got;
3753 asection *plt;
3754 asection *relplt;
3755 asection *iplt;
3756 asection *reliplt;
3757 asection *dynbss;
3758 asection *relbss;
3759 asection *glink;
3760 asection *sfpr;
3761 asection *brlt;
3762 asection *relbrlt;
3763
3764 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3765 struct ppc_link_hash_entry *tls_get_addr;
3766 struct ppc_link_hash_entry *tls_get_addr_fd;
3767
3768 /* The size of reliplt used by got entry relocs. */
3769 bfd_size_type got_reli_size;
3770
3771 /* Statistics. */
3772 unsigned long stub_count[ppc_stub_plt_call];
3773
3774 /* Number of stubs against global syms. */
3775 unsigned long stub_globals;
3776
3777 /* Set if we should emit symbols for stubs. */
3778 unsigned int emit_stub_syms:1;
3779
3780 /* Set if __tls_get_addr optimization should not be done. */
3781 unsigned int no_tls_get_addr_opt:1;
3782
3783 /* Support for multiple toc sections. */
3784 unsigned int do_multi_toc:1;
3785 unsigned int multi_toc_needed:1;
3786 unsigned int second_toc_pass:1;
3787
3788 /* Set on error. */
3789 unsigned int stub_error:1;
3790
3791 /* Temp used by ppc64_elf_process_dot_syms. */
3792 unsigned int twiddled_syms:1;
3793
3794 /* Incremented every time we size stubs. */
3795 unsigned int stub_iteration;
3796
3797 /* Small local sym cache. */
3798 struct sym_cache sym_cache;
3799 };
3800
3801 /* Rename some of the generic section flags to better document how they
3802 are used here. */
3803
3804 /* Nonzero if this section has TLS related relocations. */
3805 #define has_tls_reloc sec_flg0
3806
3807 /* Nonzero if this section has a call to __tls_get_addr. */
3808 #define has_tls_get_addr_call sec_flg1
3809
3810 /* Nonzero if this section has any toc or got relocs. */
3811 #define has_toc_reloc sec_flg2
3812
3813 /* Nonzero if this section has small toc/got relocs, ie. that expect
3814 the reloc to be in the range -32768 to 32767. */
3815 #define has_small_toc_reloc sec_flg3
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_flg4
3820
3821 /* Recursion protection when determining above flag. */
3822 #define call_check_in_progress sec_flg5
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 ATTRIBUTE_UNUSED,
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 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4570 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4571 ;
4572 else if (*sec != NULL
4573 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4574 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4575
4576 return TRUE;
4577 }
4578
4579 /* This function makes an old ABI object reference to ".bar" cause the
4580 inclusion of a new ABI object archive that defines "bar".
4581 NAME is a symbol defined in an archive. Return a symbol in the hash
4582 table that might be satisfied by the archive symbols. */
4583
4584 static struct elf_link_hash_entry *
4585 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4586 struct bfd_link_info *info,
4587 const char *name)
4588 {
4589 struct elf_link_hash_entry *h;
4590 char *dot_name;
4591 size_t len;
4592
4593 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4594 if (h != NULL
4595 /* Don't return this sym if it is a fake function descriptor
4596 created by add_symbol_adjust. */
4597 && !(h->root.type == bfd_link_hash_undefweak
4598 && ((struct ppc_link_hash_entry *) h)->fake))
4599 return h;
4600
4601 if (name[0] == '.')
4602 return h;
4603
4604 len = strlen (name);
4605 dot_name = bfd_alloc (abfd, len + 2);
4606 if (dot_name == NULL)
4607 return (struct elf_link_hash_entry *) 0 - 1;
4608 dot_name[0] = '.';
4609 memcpy (dot_name + 1, name, len + 1);
4610 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4611 bfd_release (abfd, dot_name);
4612 return h;
4613 }
4614
4615 /* This function satisfies all old ABI object references to ".bar" if a
4616 new ABI object defines "bar". Well, at least, undefined dot symbols
4617 are made weak. This stops later archive searches from including an
4618 object if we already have a function descriptor definition. It also
4619 prevents the linker complaining about undefined symbols.
4620 We also check and correct mismatched symbol visibility here. The
4621 most restrictive visibility of the function descriptor and the
4622 function entry symbol is used. */
4623
4624 static bfd_boolean
4625 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4626 {
4627 struct ppc_link_hash_table *htab;
4628 struct ppc_link_hash_entry *fdh;
4629
4630 if (eh->elf.root.type == bfd_link_hash_indirect)
4631 return TRUE;
4632
4633 if (eh->elf.root.type == bfd_link_hash_warning)
4634 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4635
4636 if (eh->elf.root.root.string[0] != '.')
4637 abort ();
4638
4639 htab = ppc_hash_table (info);
4640 if (htab == NULL)
4641 return FALSE;
4642
4643 fdh = lookup_fdh (eh, htab);
4644 if (fdh == NULL)
4645 {
4646 if (!info->relocatable
4647 && (eh->elf.root.type == bfd_link_hash_undefined
4648 || eh->elf.root.type == bfd_link_hash_undefweak)
4649 && eh->elf.ref_regular)
4650 {
4651 /* Make an undefweak function descriptor sym, which is enough to
4652 pull in an --as-needed shared lib, but won't cause link
4653 errors. Archives are handled elsewhere. */
4654 fdh = make_fdh (info, eh);
4655 if (fdh == NULL)
4656 return FALSE;
4657 fdh->elf.ref_regular = 1;
4658 }
4659 }
4660 else
4661 {
4662 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4663 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4664 if (entry_vis < descr_vis)
4665 fdh->elf.other += entry_vis - descr_vis;
4666 else if (entry_vis > descr_vis)
4667 eh->elf.other += descr_vis - entry_vis;
4668
4669 if ((fdh->elf.root.type == bfd_link_hash_defined
4670 || fdh->elf.root.type == bfd_link_hash_defweak)
4671 && eh->elf.root.type == bfd_link_hash_undefined)
4672 {
4673 eh->elf.root.type = bfd_link_hash_undefweak;
4674 eh->was_undefined = 1;
4675 htab->twiddled_syms = 1;
4676 }
4677 }
4678
4679 return TRUE;
4680 }
4681
4682 /* Process list of dot-symbols we made in link_hash_newfunc. */
4683
4684 static bfd_boolean
4685 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4686 {
4687 struct ppc_link_hash_table *htab;
4688 struct ppc_link_hash_entry **p, *eh;
4689
4690 if (!is_ppc64_elf (info->output_bfd))
4691 return TRUE;
4692 htab = ppc_hash_table (info);
4693 if (htab == NULL)
4694 return FALSE;
4695
4696 if (is_ppc64_elf (ibfd))
4697 {
4698 p = &htab->dot_syms;
4699 while ((eh = *p) != NULL)
4700 {
4701 *p = NULL;
4702 if (!add_symbol_adjust (eh, info))
4703 return FALSE;
4704 p = &eh->u.next_dot_sym;
4705 }
4706 }
4707
4708 /* Clear the list for non-ppc64 input files. */
4709 p = &htab->dot_syms;
4710 while ((eh = *p) != NULL)
4711 {
4712 *p = NULL;
4713 p = &eh->u.next_dot_sym;
4714 }
4715
4716 /* We need to fix the undefs list for any syms we have twiddled to
4717 undef_weak. */
4718 if (htab->twiddled_syms)
4719 {
4720 bfd_link_repair_undef_list (&htab->elf.root);
4721 htab->twiddled_syms = 0;
4722 }
4723 return TRUE;
4724 }
4725
4726 /* Undo hash table changes when an --as-needed input file is determined
4727 not to be needed. */
4728
4729 static bfd_boolean
4730 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4731 struct bfd_link_info *info)
4732 {
4733 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4734
4735 if (htab == NULL)
4736 return FALSE;
4737
4738 htab->dot_syms = NULL;
4739 return TRUE;
4740 }
4741
4742 static struct plt_entry **
4743 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4744 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4745 {
4746 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4747 struct plt_entry **local_plt;
4748 char *local_got_tls_masks;
4749
4750 if (local_got_ents == NULL)
4751 {
4752 bfd_size_type size = symtab_hdr->sh_info;
4753
4754 size *= (sizeof (*local_got_ents)
4755 + sizeof (*local_plt)
4756 + sizeof (*local_got_tls_masks));
4757 local_got_ents = bfd_zalloc (abfd, size);
4758 if (local_got_ents == NULL)
4759 return NULL;
4760 elf_local_got_ents (abfd) = local_got_ents;
4761 }
4762
4763 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4764 {
4765 struct got_entry *ent;
4766
4767 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4768 if (ent->addend == r_addend
4769 && ent->owner == abfd
4770 && ent->tls_type == tls_type)
4771 break;
4772 if (ent == NULL)
4773 {
4774 bfd_size_type amt = sizeof (*ent);
4775 ent = bfd_alloc (abfd, amt);
4776 if (ent == NULL)
4777 return FALSE;
4778 ent->next = local_got_ents[r_symndx];
4779 ent->addend = r_addend;
4780 ent->owner = abfd;
4781 ent->tls_type = tls_type;
4782 ent->is_indirect = FALSE;
4783 ent->got.refcount = 0;
4784 local_got_ents[r_symndx] = ent;
4785 }
4786 ent->got.refcount += 1;
4787 }
4788
4789 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4790 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
4791 local_got_tls_masks[r_symndx] |= tls_type;
4792
4793 return local_plt + r_symndx;
4794 }
4795
4796 static bfd_boolean
4797 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4798 {
4799 struct plt_entry *ent;
4800
4801 for (ent = *plist; ent != NULL; ent = ent->next)
4802 if (ent->addend == addend)
4803 break;
4804 if (ent == NULL)
4805 {
4806 bfd_size_type amt = sizeof (*ent);
4807 ent = bfd_alloc (abfd, amt);
4808 if (ent == NULL)
4809 return FALSE;
4810 ent->next = *plist;
4811 ent->addend = addend;
4812 ent->plt.refcount = 0;
4813 *plist = ent;
4814 }
4815 ent->plt.refcount += 1;
4816 return TRUE;
4817 }
4818
4819 static bfd_boolean
4820 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4821 {
4822 return (r_type == R_PPC64_REL24
4823 || r_type == R_PPC64_REL14
4824 || r_type == R_PPC64_REL14_BRTAKEN
4825 || r_type == R_PPC64_REL14_BRNTAKEN
4826 || r_type == R_PPC64_ADDR24
4827 || r_type == R_PPC64_ADDR14
4828 || r_type == R_PPC64_ADDR14_BRTAKEN
4829 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4830 }
4831
4832 /* Look through the relocs for a section during the first phase, and
4833 calculate needed space in the global offset table, procedure
4834 linkage table, and dynamic reloc sections. */
4835
4836 static bfd_boolean
4837 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4838 asection *sec, const Elf_Internal_Rela *relocs)
4839 {
4840 struct ppc_link_hash_table *htab;
4841 Elf_Internal_Shdr *symtab_hdr;
4842 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4843 const Elf_Internal_Rela *rel;
4844 const Elf_Internal_Rela *rel_end;
4845 asection *sreloc;
4846 asection **opd_sym_map;
4847 struct elf_link_hash_entry *tga, *dottga;
4848
4849 if (info->relocatable)
4850 return TRUE;
4851
4852 /* Don't do anything special with non-loaded, non-alloced sections.
4853 In particular, any relocs in such sections should not affect GOT
4854 and PLT reference counting (ie. we don't allow them to create GOT
4855 or PLT entries), there's no possibility or desire to optimize TLS
4856 relocs, and there's not much point in propagating relocs to shared
4857 libs that the dynamic linker won't relocate. */
4858 if ((sec->flags & SEC_ALLOC) == 0)
4859 return TRUE;
4860
4861 BFD_ASSERT (is_ppc64_elf (abfd));
4862
4863 htab = ppc_hash_table (info);
4864 if (htab == NULL)
4865 return FALSE;
4866
4867 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4868 FALSE, FALSE, TRUE);
4869 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4870 FALSE, FALSE, TRUE);
4871 symtab_hdr = &elf_symtab_hdr (abfd);
4872
4873 sym_hashes = elf_sym_hashes (abfd);
4874 sym_hashes_end = (sym_hashes
4875 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4876 - symtab_hdr->sh_info);
4877
4878 sreloc = NULL;
4879 opd_sym_map = NULL;
4880 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4881 {
4882 /* Garbage collection needs some extra help with .opd sections.
4883 We don't want to necessarily keep everything referenced by
4884 relocs in .opd, as that would keep all functions. Instead,
4885 if we reference an .opd symbol (a function descriptor), we
4886 want to keep the function code symbol's section. This is
4887 easy for global symbols, but for local syms we need to keep
4888 information about the associated function section. */
4889 bfd_size_type amt;
4890
4891 amt = sec->size * sizeof (*opd_sym_map) / 8;
4892 opd_sym_map = bfd_zalloc (abfd, amt);
4893 if (opd_sym_map == NULL)
4894 return FALSE;
4895 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4896 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4897 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4898 }
4899
4900 if (htab->sfpr == NULL
4901 && !create_linkage_sections (htab->elf.dynobj, info))
4902 return FALSE;
4903
4904 rel_end = relocs + sec->reloc_count;
4905 for (rel = relocs; rel < rel_end; rel++)
4906 {
4907 unsigned long r_symndx;
4908 struct elf_link_hash_entry *h;
4909 enum elf_ppc64_reloc_type r_type;
4910 int tls_type;
4911 struct _ppc64_elf_section_data *ppc64_sec;
4912 struct plt_entry **ifunc;
4913
4914 r_symndx = ELF64_R_SYM (rel->r_info);
4915 if (r_symndx < symtab_hdr->sh_info)
4916 h = NULL;
4917 else
4918 {
4919 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4920 h = elf_follow_link (h);
4921 }
4922
4923 tls_type = 0;
4924 ifunc = NULL;
4925 if (h != NULL)
4926 {
4927 if (h->type == STT_GNU_IFUNC)
4928 {
4929 h->needs_plt = 1;
4930 ifunc = &h->plt.plist;
4931 }
4932 }
4933 else
4934 {
4935 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4936 abfd, r_symndx);
4937 if (isym == NULL)
4938 return FALSE;
4939
4940 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4941 {
4942 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4943 rel->r_addend, PLT_IFUNC);
4944 if (ifunc == NULL)
4945 return FALSE;
4946 }
4947 }
4948 r_type = ELF64_R_TYPE (rel->r_info);
4949 if (is_branch_reloc (r_type))
4950 {
4951 if (h != NULL && (h == tga || h == dottga))
4952 {
4953 if (rel != relocs
4954 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4955 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4956 /* We have a new-style __tls_get_addr call with a marker
4957 reloc. */
4958 ;
4959 else
4960 /* Mark this section as having an old-style call. */
4961 sec->has_tls_get_addr_call = 1;
4962 }
4963
4964 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4965 if (ifunc != NULL
4966 && !update_plt_info (abfd, ifunc, rel->r_addend))
4967 return FALSE;
4968 }
4969
4970 switch (r_type)
4971 {
4972 case R_PPC64_TLSGD:
4973 case R_PPC64_TLSLD:
4974 /* These special tls relocs tie a call to __tls_get_addr with
4975 its parameter symbol. */
4976 break;
4977
4978 case R_PPC64_GOT_TLSLD16:
4979 case R_PPC64_GOT_TLSLD16_LO:
4980 case R_PPC64_GOT_TLSLD16_HI:
4981 case R_PPC64_GOT_TLSLD16_HA:
4982 tls_type = TLS_TLS | TLS_LD;
4983 goto dogottls;
4984
4985 case R_PPC64_GOT_TLSGD16:
4986 case R_PPC64_GOT_TLSGD16_LO:
4987 case R_PPC64_GOT_TLSGD16_HI:
4988 case R_PPC64_GOT_TLSGD16_HA:
4989 tls_type = TLS_TLS | TLS_GD;
4990 goto dogottls;
4991
4992 case R_PPC64_GOT_TPREL16_DS:
4993 case R_PPC64_GOT_TPREL16_LO_DS:
4994 case R_PPC64_GOT_TPREL16_HI:
4995 case R_PPC64_GOT_TPREL16_HA:
4996 if (!info->executable)
4997 info->flags |= DF_STATIC_TLS;
4998 tls_type = TLS_TLS | TLS_TPREL;
4999 goto dogottls;
5000
5001 case R_PPC64_GOT_DTPREL16_DS:
5002 case R_PPC64_GOT_DTPREL16_LO_DS:
5003 case R_PPC64_GOT_DTPREL16_HI:
5004 case R_PPC64_GOT_DTPREL16_HA:
5005 tls_type = TLS_TLS | TLS_DTPREL;
5006 dogottls:
5007 sec->has_tls_reloc = 1;
5008 /* Fall thru */
5009
5010 case R_PPC64_GOT16:
5011 case R_PPC64_GOT16_DS:
5012 case R_PPC64_GOT16_HA:
5013 case R_PPC64_GOT16_HI:
5014 case R_PPC64_GOT16_LO:
5015 case R_PPC64_GOT16_LO_DS:
5016 /* This symbol requires a global offset table entry. */
5017 sec->has_toc_reloc = 1;
5018 if (r_type == R_PPC64_GOT_TLSLD16
5019 || r_type == R_PPC64_GOT_TLSGD16
5020 || r_type == R_PPC64_GOT_TPREL16_DS
5021 || r_type == R_PPC64_GOT_DTPREL16_DS
5022 || r_type == R_PPC64_GOT16
5023 || r_type == R_PPC64_GOT16_DS)
5024 {
5025 htab->do_multi_toc = 1;
5026 sec->has_small_toc_reloc = 1;
5027 }
5028
5029 if (ppc64_elf_tdata (abfd)->got == NULL
5030 && !create_got_section (abfd, info))
5031 return FALSE;
5032
5033 if (h != NULL)
5034 {
5035 struct ppc_link_hash_entry *eh;
5036 struct got_entry *ent;
5037
5038 eh = (struct ppc_link_hash_entry *) h;
5039 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5040 if (ent->addend == rel->r_addend
5041 && ent->owner == abfd
5042 && ent->tls_type == tls_type)
5043 break;
5044 if (ent == NULL)
5045 {
5046 bfd_size_type amt = sizeof (*ent);
5047 ent = bfd_alloc (abfd, amt);
5048 if (ent == NULL)
5049 return FALSE;
5050 ent->next = eh->elf.got.glist;
5051 ent->addend = rel->r_addend;
5052 ent->owner = abfd;
5053 ent->tls_type = tls_type;
5054 ent->is_indirect = FALSE;
5055 ent->got.refcount = 0;
5056 eh->elf.got.glist = ent;
5057 }
5058 ent->got.refcount += 1;
5059 eh->tls_mask |= tls_type;
5060 }
5061 else
5062 /* This is a global offset table entry for a local symbol. */
5063 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5064 rel->r_addend, tls_type))
5065 return FALSE;
5066 break;
5067
5068 case R_PPC64_PLT16_HA:
5069 case R_PPC64_PLT16_HI:
5070 case R_PPC64_PLT16_LO:
5071 case R_PPC64_PLT32:
5072 case R_PPC64_PLT64:
5073 /* This symbol requires a procedure linkage table entry. We
5074 actually build the entry in adjust_dynamic_symbol,
5075 because this might be a case of linking PIC code without
5076 linking in any dynamic objects, in which case we don't
5077 need to generate a procedure linkage table after all. */
5078 if (h == NULL)
5079 {
5080 /* It does not make sense to have a procedure linkage
5081 table entry for a local symbol. */
5082 bfd_set_error (bfd_error_bad_value);
5083 return FALSE;
5084 }
5085 else
5086 {
5087 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5088 return FALSE;
5089 h->needs_plt = 1;
5090 if (h->root.root.string[0] == '.'
5091 && h->root.root.string[1] != '\0')
5092 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5093 }
5094 break;
5095
5096 /* The following relocations don't need to propagate the
5097 relocation if linking a shared object since they are
5098 section relative. */
5099 case R_PPC64_SECTOFF:
5100 case R_PPC64_SECTOFF_LO:
5101 case R_PPC64_SECTOFF_HI:
5102 case R_PPC64_SECTOFF_HA:
5103 case R_PPC64_SECTOFF_DS:
5104 case R_PPC64_SECTOFF_LO_DS:
5105 case R_PPC64_DTPREL16:
5106 case R_PPC64_DTPREL16_LO:
5107 case R_PPC64_DTPREL16_HI:
5108 case R_PPC64_DTPREL16_HA:
5109 case R_PPC64_DTPREL16_DS:
5110 case R_PPC64_DTPREL16_LO_DS:
5111 case R_PPC64_DTPREL16_HIGHER:
5112 case R_PPC64_DTPREL16_HIGHERA:
5113 case R_PPC64_DTPREL16_HIGHEST:
5114 case R_PPC64_DTPREL16_HIGHESTA:
5115 break;
5116
5117 /* Nor do these. */
5118 case R_PPC64_REL16:
5119 case R_PPC64_REL16_LO:
5120 case R_PPC64_REL16_HI:
5121 case R_PPC64_REL16_HA:
5122 break;
5123
5124 case R_PPC64_TOC16:
5125 case R_PPC64_TOC16_DS:
5126 htab->do_multi_toc = 1;
5127 sec->has_small_toc_reloc = 1;
5128 case R_PPC64_TOC16_LO:
5129 case R_PPC64_TOC16_HI:
5130 case R_PPC64_TOC16_HA:
5131 case R_PPC64_TOC16_LO_DS:
5132 sec->has_toc_reloc = 1;
5133 break;
5134
5135 /* This relocation describes the C++ object vtable hierarchy.
5136 Reconstruct it for later use during GC. */
5137 case R_PPC64_GNU_VTINHERIT:
5138 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5139 return FALSE;
5140 break;
5141
5142 /* This relocation describes which C++ vtable entries are actually
5143 used. Record for later use during GC. */
5144 case R_PPC64_GNU_VTENTRY:
5145 BFD_ASSERT (h != NULL);
5146 if (h != NULL
5147 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5148 return FALSE;
5149 break;
5150
5151 case R_PPC64_REL14:
5152 case R_PPC64_REL14_BRTAKEN:
5153 case R_PPC64_REL14_BRNTAKEN:
5154 {
5155 asection *dest = NULL;
5156
5157 /* Heuristic: If jumping outside our section, chances are
5158 we are going to need a stub. */
5159 if (h != NULL)
5160 {
5161 /* If the sym is weak it may be overridden later, so
5162 don't assume we know where a weak sym lives. */
5163 if (h->root.type == bfd_link_hash_defined)
5164 dest = h->root.u.def.section;
5165 }
5166 else
5167 {
5168 Elf_Internal_Sym *isym;
5169
5170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5171 abfd, r_symndx);
5172 if (isym == NULL)
5173 return FALSE;
5174
5175 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5176 }
5177
5178 if (dest != sec)
5179 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5180 }
5181 /* Fall through. */
5182
5183 case R_PPC64_REL24:
5184 if (h != NULL && ifunc == NULL)
5185 {
5186 /* We may need a .plt entry if the function this reloc
5187 refers to is in a shared lib. */
5188 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5189 return FALSE;
5190 h->needs_plt = 1;
5191 if (h->root.root.string[0] == '.'
5192 && h->root.root.string[1] != '\0')
5193 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5194 if (h == tga || h == dottga)
5195 sec->has_tls_reloc = 1;
5196 }
5197 break;
5198
5199 case R_PPC64_TPREL64:
5200 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5201 if (!info->executable)
5202 info->flags |= DF_STATIC_TLS;
5203 goto dotlstoc;
5204
5205 case R_PPC64_DTPMOD64:
5206 if (rel + 1 < rel_end
5207 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5208 && rel[1].r_offset == rel->r_offset + 8)
5209 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5210 else
5211 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5212 goto dotlstoc;
5213
5214 case R_PPC64_DTPREL64:
5215 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5216 if (rel != relocs
5217 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5218 && rel[-1].r_offset == rel->r_offset - 8)
5219 /* This is the second reloc of a dtpmod, dtprel pair.
5220 Don't mark with TLS_DTPREL. */
5221 goto dodyn;
5222
5223 dotlstoc:
5224 sec->has_tls_reloc = 1;
5225 if (h != NULL)
5226 {
5227 struct ppc_link_hash_entry *eh;
5228 eh = (struct ppc_link_hash_entry *) h;
5229 eh->tls_mask |= tls_type;
5230 }
5231 else
5232 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5233 rel->r_addend, tls_type))
5234 return FALSE;
5235
5236 ppc64_sec = ppc64_elf_section_data (sec);
5237 if (ppc64_sec->sec_type != sec_toc)
5238 {
5239 bfd_size_type amt;
5240
5241 /* One extra to simplify get_tls_mask. */
5242 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5243 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5244 if (ppc64_sec->u.toc.symndx == NULL)
5245 return FALSE;
5246 amt = sec->size * sizeof (bfd_vma) / 8;
5247 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5248 if (ppc64_sec->u.toc.add == NULL)
5249 return FALSE;
5250 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5251 ppc64_sec->sec_type = sec_toc;
5252 }
5253 BFD_ASSERT (rel->r_offset % 8 == 0);
5254 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5255 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5256
5257 /* Mark the second slot of a GD or LD entry.
5258 -1 to indicate GD and -2 to indicate LD. */
5259 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5260 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5261 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5262 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5263 goto dodyn;
5264
5265 case R_PPC64_TPREL16:
5266 case R_PPC64_TPREL16_LO:
5267 case R_PPC64_TPREL16_HI:
5268 case R_PPC64_TPREL16_HA:
5269 case R_PPC64_TPREL16_DS:
5270 case R_PPC64_TPREL16_LO_DS:
5271 case R_PPC64_TPREL16_HIGHER:
5272 case R_PPC64_TPREL16_HIGHERA:
5273 case R_PPC64_TPREL16_HIGHEST:
5274 case R_PPC64_TPREL16_HIGHESTA:
5275 if (info->shared)
5276 {
5277 if (!info->executable)
5278 info->flags |= DF_STATIC_TLS;
5279 goto dodyn;
5280 }
5281 break;
5282
5283 case R_PPC64_ADDR64:
5284 if (opd_sym_map != NULL
5285 && rel + 1 < rel_end
5286 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5287 {
5288 if (h != NULL)
5289 {
5290 if (h->root.root.string[0] == '.'
5291 && h->root.root.string[1] != 0
5292 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5293 ;
5294 else
5295 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5296 }
5297 else
5298 {
5299 asection *s;
5300 Elf_Internal_Sym *isym;
5301
5302 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5303 abfd, r_symndx);
5304 if (isym == NULL)
5305 return FALSE;
5306
5307 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5308 if (s != NULL && s != sec)
5309 opd_sym_map[rel->r_offset / 8] = s;
5310 }
5311 }
5312 /* Fall through. */
5313
5314 case R_PPC64_REL30:
5315 case R_PPC64_REL32:
5316 case R_PPC64_REL64:
5317 case R_PPC64_ADDR14:
5318 case R_PPC64_ADDR14_BRNTAKEN:
5319 case R_PPC64_ADDR14_BRTAKEN:
5320 case R_PPC64_ADDR16:
5321 case R_PPC64_ADDR16_DS:
5322 case R_PPC64_ADDR16_HA:
5323 case R_PPC64_ADDR16_HI:
5324 case R_PPC64_ADDR16_HIGHER:
5325 case R_PPC64_ADDR16_HIGHERA:
5326 case R_PPC64_ADDR16_HIGHEST:
5327 case R_PPC64_ADDR16_HIGHESTA:
5328 case R_PPC64_ADDR16_LO:
5329 case R_PPC64_ADDR16_LO_DS:
5330 case R_PPC64_ADDR24:
5331 case R_PPC64_ADDR32:
5332 case R_PPC64_UADDR16:
5333 case R_PPC64_UADDR32:
5334 case R_PPC64_UADDR64:
5335 case R_PPC64_TOC:
5336 if (h != NULL && !info->shared)
5337 /* We may need a copy reloc. */
5338 h->non_got_ref = 1;
5339
5340 /* Don't propagate .opd relocs. */
5341 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5342 break;
5343
5344 /* If we are creating a shared library, and this is a reloc
5345 against a global symbol, or a non PC relative reloc
5346 against a local symbol, then we need to copy the reloc
5347 into the shared library. However, if we are linking with
5348 -Bsymbolic, we do not need to copy a reloc against a
5349 global symbol which is defined in an object we are
5350 including in the link (i.e., DEF_REGULAR is set). At
5351 this point we have not seen all the input files, so it is
5352 possible that DEF_REGULAR is not set now but will be set
5353 later (it is never cleared). In case of a weak definition,
5354 DEF_REGULAR may be cleared later by a strong definition in
5355 a shared library. We account for that possibility below by
5356 storing information in the dyn_relocs field of the hash
5357 table entry. A similar situation occurs when creating
5358 shared libraries and symbol visibility changes render the
5359 symbol local.
5360
5361 If on the other hand, we are creating an executable, we
5362 may need to keep relocations for symbols satisfied by a
5363 dynamic library if we manage to avoid copy relocs for the
5364 symbol. */
5365 dodyn:
5366 if ((info->shared
5367 && (must_be_dyn_reloc (info, r_type)
5368 || (h != NULL
5369 && (! info->symbolic
5370 || h->root.type == bfd_link_hash_defweak
5371 || !h->def_regular))))
5372 || (ELIMINATE_COPY_RELOCS
5373 && !info->shared
5374 && h != NULL
5375 && (h->root.type == bfd_link_hash_defweak
5376 || !h->def_regular))
5377 || (!info->shared
5378 && ifunc != NULL))
5379 {
5380 struct ppc_dyn_relocs *p;
5381 struct ppc_dyn_relocs **head;
5382
5383 /* We must copy these reloc types into the output file.
5384 Create a reloc section in dynobj and make room for
5385 this reloc. */
5386 if (sreloc == NULL)
5387 {
5388 sreloc = _bfd_elf_make_dynamic_reloc_section
5389 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5390
5391 if (sreloc == NULL)
5392 return FALSE;
5393 }
5394
5395 /* If this is a global symbol, we count the number of
5396 relocations we need for this symbol. */
5397 if (h != NULL)
5398 {
5399 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5400 }
5401 else
5402 {
5403 /* Track dynamic relocs needed for local syms too.
5404 We really need local syms available to do this
5405 easily. Oh well. */
5406 asection *s;
5407 void *vpp;
5408 Elf_Internal_Sym *isym;
5409
5410 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5411 abfd, r_symndx);
5412 if (isym == NULL)
5413 return FALSE;
5414
5415 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5416 if (s == NULL)
5417 s = sec;
5418
5419 vpp = &elf_section_data (s)->local_dynrel;
5420 head = (struct ppc_dyn_relocs **) vpp;
5421 }
5422
5423 p = *head;
5424 if (p == NULL || p->sec != sec)
5425 {
5426 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5427 if (p == NULL)
5428 return FALSE;
5429 p->next = *head;
5430 *head = p;
5431 p->sec = sec;
5432 p->count = 0;
5433 p->pc_count = 0;
5434 }
5435
5436 p->count += 1;
5437 if (!must_be_dyn_reloc (info, r_type))
5438 p->pc_count += 1;
5439 }
5440 break;
5441
5442 default:
5443 break;
5444 }
5445 }
5446
5447 return TRUE;
5448 }
5449
5450 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5451 of the code entry point, and its section. */
5452
5453 static bfd_vma
5454 opd_entry_value (asection *opd_sec,
5455 bfd_vma offset,
5456 asection **code_sec,
5457 bfd_vma *code_off)
5458 {
5459 bfd *opd_bfd = opd_sec->owner;
5460 Elf_Internal_Rela *relocs;
5461 Elf_Internal_Rela *lo, *hi, *look;
5462 bfd_vma val;
5463
5464 /* No relocs implies we are linking a --just-symbols object. */
5465 if (opd_sec->reloc_count == 0)
5466 {
5467 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5468 return (bfd_vma) -1;
5469
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* If FDH is a function descriptor symbol, return the associated code
5565 entry symbol if it is defined. Return NULL otherwise. */
5566
5567 static struct ppc_link_hash_entry *
5568 defined_code_entry (struct ppc_link_hash_entry *fdh)
5569 {
5570 if (fdh->is_func_descriptor)
5571 {
5572 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5573 if (fh->elf.root.type == bfd_link_hash_defined
5574 || fh->elf.root.type == bfd_link_hash_defweak)
5575 return fh;
5576 }
5577 return NULL;
5578 }
5579
5580 /* If FH is a function code entry symbol, return the associated
5581 function descriptor symbol if it is defined. Return NULL otherwise. */
5582
5583 static struct ppc_link_hash_entry *
5584 defined_func_desc (struct ppc_link_hash_entry *fh)
5585 {
5586 if (fh->oh != NULL
5587 && fh->oh->is_func_descriptor)
5588 {
5589 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5590 if (fdh->elf.root.type == bfd_link_hash_defined
5591 || fdh->elf.root.type == bfd_link_hash_defweak)
5592 return fdh;
5593 }
5594 return NULL;
5595 }
5596
5597 /* Mark all our entry sym sections, both opd and code section. */
5598
5599 static void
5600 ppc64_elf_gc_keep (struct bfd_link_info *info)
5601 {
5602 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5603 struct bfd_sym_chain *sym;
5604
5605 if (htab == NULL)
5606 return;
5607
5608 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5609 {
5610 struct ppc_link_hash_entry *eh, *fh;
5611 asection *sec;
5612
5613 eh = (struct ppc_link_hash_entry *)
5614 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5615 if (eh == NULL)
5616 continue;
5617 if (eh->elf.root.type != bfd_link_hash_defined
5618 && eh->elf.root.type != bfd_link_hash_defweak)
5619 continue;
5620
5621 fh = defined_code_entry (eh);
5622 if (fh != NULL)
5623 {
5624 sec = fh->elf.root.u.def.section;
5625 sec->flags |= SEC_KEEP;
5626 }
5627 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5628 && opd_entry_value (eh->elf.root.u.def.section,
5629 eh->elf.root.u.def.value,
5630 &sec, NULL) != (bfd_vma) -1)
5631 sec->flags |= SEC_KEEP;
5632
5633 sec = eh->elf.root.u.def.section;
5634 sec->flags |= SEC_KEEP;
5635 }
5636 }
5637
5638 /* Mark sections containing dynamically referenced symbols. When
5639 building shared libraries, we must assume that any visible symbol is
5640 referenced. */
5641
5642 static bfd_boolean
5643 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5644 {
5645 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5646 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5647 struct ppc_link_hash_entry *fdh;
5648
5649 if (eh->elf.root.type == bfd_link_hash_warning)
5650 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5651
5652 /* Dynamic linking info is on the func descriptor sym. */
5653 fdh = defined_func_desc (eh);
5654 if (fdh != NULL)
5655 eh = fdh;
5656
5657 if ((eh->elf.root.type == bfd_link_hash_defined
5658 || eh->elf.root.type == bfd_link_hash_defweak)
5659 && (eh->elf.ref_dynamic
5660 || (!info->executable
5661 && eh->elf.def_regular
5662 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5663 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5664 {
5665 asection *code_sec;
5666 struct ppc_link_hash_entry *fh;
5667
5668 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5669
5670 /* Function descriptor syms cause the associated
5671 function code sym section to be marked. */
5672 fh = defined_code_entry (eh);
5673 if (fh != NULL)
5674 {
5675 code_sec = fh->elf.root.u.def.section;
5676 code_sec->flags |= SEC_KEEP;
5677 }
5678 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5679 && opd_entry_value (eh->elf.root.u.def.section,
5680 eh->elf.root.u.def.value,
5681 &code_sec, NULL) != (bfd_vma) -1)
5682 code_sec->flags |= SEC_KEEP;
5683 }
5684
5685 return TRUE;
5686 }
5687
5688 /* Return the section that should be marked against GC for a given
5689 relocation. */
5690
5691 static asection *
5692 ppc64_elf_gc_mark_hook (asection *sec,
5693 struct bfd_link_info *info,
5694 Elf_Internal_Rela *rel,
5695 struct elf_link_hash_entry *h,
5696 Elf_Internal_Sym *sym)
5697 {
5698 asection *rsec;
5699
5700 /* Syms return NULL if we're marking .opd, so we avoid marking all
5701 function sections, as all functions are referenced in .opd. */
5702 rsec = NULL;
5703 if (get_opd_info (sec) != NULL)
5704 return rsec;
5705
5706 if (h != NULL)
5707 {
5708 enum elf_ppc64_reloc_type r_type;
5709 struct ppc_link_hash_entry *eh, *fh, *fdh;
5710
5711 r_type = ELF64_R_TYPE (rel->r_info);
5712 switch (r_type)
5713 {
5714 case R_PPC64_GNU_VTINHERIT:
5715 case R_PPC64_GNU_VTENTRY:
5716 break;
5717
5718 default:
5719 switch (h->root.type)
5720 {
5721 case bfd_link_hash_defined:
5722 case bfd_link_hash_defweak:
5723 eh = (struct ppc_link_hash_entry *) h;
5724 fdh = defined_func_desc (eh);
5725 if (fdh != NULL)
5726 eh = fdh;
5727
5728 /* Function descriptor syms cause the associated
5729 function code sym section to be marked. */
5730 fh = defined_code_entry (eh);
5731 if (fh != NULL)
5732 {
5733 /* They also mark their opd section. */
5734 eh->elf.root.u.def.section->gc_mark = 1;
5735
5736 rsec = fh->elf.root.u.def.section;
5737 }
5738 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5739 && opd_entry_value (eh->elf.root.u.def.section,
5740 eh->elf.root.u.def.value,
5741 &rsec, NULL) != (bfd_vma) -1)
5742 eh->elf.root.u.def.section->gc_mark = 1;
5743 else
5744 rsec = h->root.u.def.section;
5745 break;
5746
5747 case bfd_link_hash_common:
5748 rsec = h->root.u.c.p->section;
5749 break;
5750
5751 default:
5752 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5753 }
5754 }
5755 }
5756 else
5757 {
5758 struct _opd_sec_data *opd;
5759
5760 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5761 opd = get_opd_info (rsec);
5762 if (opd != NULL && opd->func_sec != NULL)
5763 {
5764 rsec->gc_mark = 1;
5765
5766 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5767 }
5768 }
5769
5770 return rsec;
5771 }
5772
5773 /* Update the .got, .plt. and dynamic reloc reference counts for the
5774 section being removed. */
5775
5776 static bfd_boolean
5777 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5778 asection *sec, const Elf_Internal_Rela *relocs)
5779 {
5780 struct ppc_link_hash_table *htab;
5781 Elf_Internal_Shdr *symtab_hdr;
5782 struct elf_link_hash_entry **sym_hashes;
5783 struct got_entry **local_got_ents;
5784 const Elf_Internal_Rela *rel, *relend;
5785
5786 if (info->relocatable)
5787 return TRUE;
5788
5789 if ((sec->flags & SEC_ALLOC) == 0)
5790 return TRUE;
5791
5792 elf_section_data (sec)->local_dynrel = NULL;
5793
5794 htab = ppc_hash_table (info);
5795 if (htab == NULL)
5796 return FALSE;
5797
5798 symtab_hdr = &elf_symtab_hdr (abfd);
5799 sym_hashes = elf_sym_hashes (abfd);
5800 local_got_ents = elf_local_got_ents (abfd);
5801
5802 relend = relocs + sec->reloc_count;
5803 for (rel = relocs; rel < relend; rel++)
5804 {
5805 unsigned long r_symndx;
5806 enum elf_ppc64_reloc_type r_type;
5807 struct elf_link_hash_entry *h = NULL;
5808 char tls_type = 0;
5809
5810 r_symndx = ELF64_R_SYM (rel->r_info);
5811 r_type = ELF64_R_TYPE (rel->r_info);
5812 if (r_symndx >= symtab_hdr->sh_info)
5813 {
5814 struct ppc_link_hash_entry *eh;
5815 struct ppc_dyn_relocs **pp;
5816 struct ppc_dyn_relocs *p;
5817
5818 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5819 h = elf_follow_link (h);
5820 eh = (struct ppc_link_hash_entry *) h;
5821
5822 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5823 if (p->sec == sec)
5824 {
5825 /* Everything must go for SEC. */
5826 *pp = p->next;
5827 break;
5828 }
5829 }
5830
5831 if (is_branch_reloc (r_type))
5832 {
5833 struct plt_entry **ifunc = NULL;
5834 if (h != NULL)
5835 {
5836 if (h->type == STT_GNU_IFUNC)
5837 ifunc = &h->plt.plist;
5838 }
5839 else if (local_got_ents != NULL)
5840 {
5841 struct plt_entry **local_plt = (struct plt_entry **)
5842 (local_got_ents + symtab_hdr->sh_info);
5843 char *local_got_tls_masks = (char *)
5844 (local_plt + symtab_hdr->sh_info);
5845 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5846 ifunc = local_plt + r_symndx;
5847 }
5848 if (ifunc != NULL)
5849 {
5850 struct plt_entry *ent;
5851
5852 for (ent = *ifunc; ent != NULL; ent = ent->next)
5853 if (ent->addend == rel->r_addend)
5854 break;
5855 if (ent == NULL)
5856 abort ();
5857 if (ent->plt.refcount > 0)
5858 ent->plt.refcount -= 1;
5859 continue;
5860 }
5861 }
5862
5863 switch (r_type)
5864 {
5865 case R_PPC64_GOT_TLSLD16:
5866 case R_PPC64_GOT_TLSLD16_LO:
5867 case R_PPC64_GOT_TLSLD16_HI:
5868 case R_PPC64_GOT_TLSLD16_HA:
5869 tls_type = TLS_TLS | TLS_LD;
5870 goto dogot;
5871
5872 case R_PPC64_GOT_TLSGD16:
5873 case R_PPC64_GOT_TLSGD16_LO:
5874 case R_PPC64_GOT_TLSGD16_HI:
5875 case R_PPC64_GOT_TLSGD16_HA:
5876 tls_type = TLS_TLS | TLS_GD;
5877 goto dogot;
5878
5879 case R_PPC64_GOT_TPREL16_DS:
5880 case R_PPC64_GOT_TPREL16_LO_DS:
5881 case R_PPC64_GOT_TPREL16_HI:
5882 case R_PPC64_GOT_TPREL16_HA:
5883 tls_type = TLS_TLS | TLS_TPREL;
5884 goto dogot;
5885
5886 case R_PPC64_GOT_DTPREL16_DS:
5887 case R_PPC64_GOT_DTPREL16_LO_DS:
5888 case R_PPC64_GOT_DTPREL16_HI:
5889 case R_PPC64_GOT_DTPREL16_HA:
5890 tls_type = TLS_TLS | TLS_DTPREL;
5891 goto dogot;
5892
5893 case R_PPC64_GOT16:
5894 case R_PPC64_GOT16_DS:
5895 case R_PPC64_GOT16_HA:
5896 case R_PPC64_GOT16_HI:
5897 case R_PPC64_GOT16_LO:
5898 case R_PPC64_GOT16_LO_DS:
5899 dogot:
5900 {
5901 struct got_entry *ent;
5902
5903 if (h != NULL)
5904 ent = h->got.glist;
5905 else
5906 ent = local_got_ents[r_symndx];
5907
5908 for (; ent != NULL; ent = ent->next)
5909 if (ent->addend == rel->r_addend
5910 && ent->owner == abfd
5911 && ent->tls_type == tls_type)
5912 break;
5913 if (ent == NULL)
5914 abort ();
5915 if (ent->got.refcount > 0)
5916 ent->got.refcount -= 1;
5917 }
5918 break;
5919
5920 case R_PPC64_PLT16_HA:
5921 case R_PPC64_PLT16_HI:
5922 case R_PPC64_PLT16_LO:
5923 case R_PPC64_PLT32:
5924 case R_PPC64_PLT64:
5925 case R_PPC64_REL14:
5926 case R_PPC64_REL14_BRNTAKEN:
5927 case R_PPC64_REL14_BRTAKEN:
5928 case R_PPC64_REL24:
5929 if (h != NULL)
5930 {
5931 struct plt_entry *ent;
5932
5933 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5934 if (ent->addend == rel->r_addend)
5935 break;
5936 if (ent != NULL && ent->plt.refcount > 0)
5937 ent->plt.refcount -= 1;
5938 }
5939 break;
5940
5941 default:
5942 break;
5943 }
5944 }
5945 return TRUE;
5946 }
5947
5948 /* The maximum size of .sfpr. */
5949 #define SFPR_MAX (218*4)
5950
5951 struct sfpr_def_parms
5952 {
5953 const char name[12];
5954 unsigned char lo, hi;
5955 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5956 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5957 };
5958
5959 /* Auto-generate _save*, _rest* functions in .sfpr. */
5960
5961 static bfd_boolean
5962 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5963 {
5964 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5965 unsigned int i;
5966 size_t len = strlen (parm->name);
5967 bfd_boolean writing = FALSE;
5968 char sym[16];
5969
5970 if (htab == NULL)
5971 return FALSE;
5972
5973 memcpy (sym, parm->name, len);
5974 sym[len + 2] = 0;
5975
5976 for (i = parm->lo; i <= parm->hi; i++)
5977 {
5978 struct elf_link_hash_entry *h;
5979
5980 sym[len + 0] = i / 10 + '0';
5981 sym[len + 1] = i % 10 + '0';
5982 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5983 if (h != NULL
5984 && !h->def_regular)
5985 {
5986 h->root.type = bfd_link_hash_defined;
5987 h->root.u.def.section = htab->sfpr;
5988 h->root.u.def.value = htab->sfpr->size;
5989 h->type = STT_FUNC;
5990 h->def_regular = 1;
5991 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5992 writing = TRUE;
5993 if (htab->sfpr->contents == NULL)
5994 {
5995 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5996 if (htab->sfpr->contents == NULL)
5997 return FALSE;
5998 }
5999 }
6000 if (writing)
6001 {
6002 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6003 if (i != parm->hi)
6004 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6005 else
6006 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6007 htab->sfpr->size = p - htab->sfpr->contents;
6008 }
6009 }
6010
6011 return TRUE;
6012 }
6013
6014 static bfd_byte *
6015 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6016 {
6017 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6018 return p + 4;
6019 }
6020
6021 static bfd_byte *
6022 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6023 {
6024 p = savegpr0 (abfd, p, r);
6025 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6026 p = p + 4;
6027 bfd_put_32 (abfd, BLR, p);
6028 return p + 4;
6029 }
6030
6031 static bfd_byte *
6032 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6033 {
6034 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6035 return p + 4;
6036 }
6037
6038 static bfd_byte *
6039 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6040 {
6041 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6042 p = p + 4;
6043 p = restgpr0 (abfd, p, r);
6044 bfd_put_32 (abfd, MTLR_R0, p);
6045 p = p + 4;
6046 if (r == 29)
6047 {
6048 p = restgpr0 (abfd, p, 30);
6049 p = restgpr0 (abfd, p, 31);
6050 }
6051 bfd_put_32 (abfd, BLR, p);
6052 return p + 4;
6053 }
6054
6055 static bfd_byte *
6056 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6057 {
6058 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6059 return p + 4;
6060 }
6061
6062 static bfd_byte *
6063 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6064 {
6065 p = savegpr1 (abfd, p, r);
6066 bfd_put_32 (abfd, BLR, p);
6067 return p + 4;
6068 }
6069
6070 static bfd_byte *
6071 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6072 {
6073 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6074 return p + 4;
6075 }
6076
6077 static bfd_byte *
6078 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6079 {
6080 p = restgpr1 (abfd, p, r);
6081 bfd_put_32 (abfd, BLR, p);
6082 return p + 4;
6083 }
6084
6085 static bfd_byte *
6086 savefpr (bfd *abfd, bfd_byte *p, int r)
6087 {
6088 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6089 return p + 4;
6090 }
6091
6092 static bfd_byte *
6093 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6094 {
6095 p = savefpr (abfd, p, r);
6096 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6097 p = p + 4;
6098 bfd_put_32 (abfd, BLR, p);
6099 return p + 4;
6100 }
6101
6102 static bfd_byte *
6103 restfpr (bfd *abfd, bfd_byte *p, int r)
6104 {
6105 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6106 return p + 4;
6107 }
6108
6109 static bfd_byte *
6110 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6111 {
6112 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6113 p = p + 4;
6114 p = restfpr (abfd, p, r);
6115 bfd_put_32 (abfd, MTLR_R0, p);
6116 p = p + 4;
6117 if (r == 29)
6118 {
6119 p = restfpr (abfd, p, 30);
6120 p = restfpr (abfd, p, 31);
6121 }
6122 bfd_put_32 (abfd, BLR, p);
6123 return p + 4;
6124 }
6125
6126 static bfd_byte *
6127 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6128 {
6129 p = savefpr (abfd, p, r);
6130 bfd_put_32 (abfd, BLR, p);
6131 return p + 4;
6132 }
6133
6134 static bfd_byte *
6135 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6136 {
6137 p = restfpr (abfd, p, r);
6138 bfd_put_32 (abfd, BLR, p);
6139 return p + 4;
6140 }
6141
6142 static bfd_byte *
6143 savevr (bfd *abfd, bfd_byte *p, int r)
6144 {
6145 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6146 p = p + 4;
6147 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6148 return p + 4;
6149 }
6150
6151 static bfd_byte *
6152 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6153 {
6154 p = savevr (abfd, p, r);
6155 bfd_put_32 (abfd, BLR, p);
6156 return p + 4;
6157 }
6158
6159 static bfd_byte *
6160 restvr (bfd *abfd, bfd_byte *p, int r)
6161 {
6162 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6163 p = p + 4;
6164 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6165 return p + 4;
6166 }
6167
6168 static bfd_byte *
6169 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6170 {
6171 p = restvr (abfd, p, r);
6172 bfd_put_32 (abfd, BLR, p);
6173 return p + 4;
6174 }
6175
6176 /* Called via elf_link_hash_traverse to transfer dynamic linking
6177 information on function code symbol entries to their corresponding
6178 function descriptor symbol entries. */
6179
6180 static bfd_boolean
6181 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6182 {
6183 struct bfd_link_info *info;
6184 struct ppc_link_hash_table *htab;
6185 struct plt_entry *ent;
6186 struct ppc_link_hash_entry *fh;
6187 struct ppc_link_hash_entry *fdh;
6188 bfd_boolean force_local;
6189
6190 fh = (struct ppc_link_hash_entry *) h;
6191 if (fh->elf.root.type == bfd_link_hash_indirect)
6192 return TRUE;
6193
6194 if (fh->elf.root.type == bfd_link_hash_warning)
6195 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6196
6197 info = inf;
6198 htab = ppc_hash_table (info);
6199 if (htab == NULL)
6200 return FALSE;
6201
6202 /* Resolve undefined references to dot-symbols as the value
6203 in the function descriptor, if we have one in a regular object.
6204 This is to satisfy cases like ".quad .foo". Calls to functions
6205 in dynamic objects are handled elsewhere. */
6206 if (fh->elf.root.type == bfd_link_hash_undefweak
6207 && fh->was_undefined
6208 && (fdh = defined_func_desc (fh)) != NULL
6209 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6210 && opd_entry_value (fdh->elf.root.u.def.section,
6211 fdh->elf.root.u.def.value,
6212 &fh->elf.root.u.def.section,
6213 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6214 {
6215 fh->elf.root.type = fdh->elf.root.type;
6216 fh->elf.forced_local = 1;
6217 fh->elf.def_regular = fdh->elf.def_regular;
6218 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6219 }
6220
6221 /* If this is a function code symbol, transfer dynamic linking
6222 information to the function descriptor symbol. */
6223 if (!fh->is_func)
6224 return TRUE;
6225
6226 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6227 if (ent->plt.refcount > 0)
6228 break;
6229 if (ent == NULL
6230 || fh->elf.root.root.string[0] != '.'
6231 || fh->elf.root.root.string[1] == '\0')
6232 return TRUE;
6233
6234 /* Find the corresponding function descriptor symbol. Create it
6235 as undefined if necessary. */
6236
6237 fdh = lookup_fdh (fh, htab);
6238 if (fdh == NULL
6239 && !info->executable
6240 && (fh->elf.root.type == bfd_link_hash_undefined
6241 || fh->elf.root.type == bfd_link_hash_undefweak))
6242 {
6243 fdh = make_fdh (info, fh);
6244 if (fdh == NULL)
6245 return FALSE;
6246 }
6247
6248 /* Fake function descriptors are made undefweak. If the function
6249 code symbol is strong undefined, make the fake sym the same.
6250 If the function code symbol is defined, then force the fake
6251 descriptor local; We can't support overriding of symbols in a
6252 shared library on a fake descriptor. */
6253
6254 if (fdh != NULL
6255 && fdh->fake
6256 && fdh->elf.root.type == bfd_link_hash_undefweak)
6257 {
6258 if (fh->elf.root.type == bfd_link_hash_undefined)
6259 {
6260 fdh->elf.root.type = bfd_link_hash_undefined;
6261 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6262 }
6263 else if (fh->elf.root.type == bfd_link_hash_defined
6264 || fh->elf.root.type == bfd_link_hash_defweak)
6265 {
6266 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6267 }
6268 }
6269
6270 if (fdh != NULL
6271 && !fdh->elf.forced_local
6272 && (!info->executable
6273 || fdh->elf.def_dynamic
6274 || fdh->elf.ref_dynamic
6275 || (fdh->elf.root.type == bfd_link_hash_undefweak
6276 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6277 {
6278 if (fdh->elf.dynindx == -1)
6279 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6280 return FALSE;
6281 fdh->elf.ref_regular |= fh->elf.ref_regular;
6282 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6283 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6284 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6285 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6286 {
6287 move_plt_plist (fh, fdh);
6288 fdh->elf.needs_plt = 1;
6289 }
6290 fdh->is_func_descriptor = 1;
6291 fdh->oh = fh;
6292 fh->oh = fdh;
6293 }
6294
6295 /* Now that the info is on the function descriptor, clear the
6296 function code sym info. Any function code syms for which we
6297 don't have a definition in a regular file, we force local.
6298 This prevents a shared library from exporting syms that have
6299 been imported from another library. Function code syms that
6300 are really in the library we must leave global to prevent the
6301 linker dragging in a definition from a static library. */
6302 force_local = (!fh->elf.def_regular
6303 || fdh == NULL
6304 || !fdh->elf.def_regular
6305 || fdh->elf.forced_local);
6306 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6307
6308 return TRUE;
6309 }
6310
6311 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6312 this hook to a) provide some gcc support functions, and b) transfer
6313 dynamic linking information gathered so far on function code symbol
6314 entries, to their corresponding function descriptor symbol entries. */
6315
6316 static bfd_boolean
6317 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6318 struct bfd_link_info *info)
6319 {
6320 struct ppc_link_hash_table *htab;
6321 unsigned int i;
6322 const struct sfpr_def_parms funcs[] =
6323 {
6324 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6325 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6326 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6327 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6328 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6329 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6330 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6331 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6332 { "._savef", 14, 31, savefpr, savefpr1_tail },
6333 { "._restf", 14, 31, restfpr, restfpr1_tail },
6334 { "_savevr_", 20, 31, savevr, savevr_tail },
6335 { "_restvr_", 20, 31, restvr, restvr_tail }
6336 };
6337
6338 htab = ppc_hash_table (info);
6339 if (htab == NULL)
6340 return FALSE;
6341
6342 if (htab->sfpr == NULL)
6343 /* We don't have any relocs. */
6344 return TRUE;
6345
6346 /* Provide any missing _save* and _rest* functions. */
6347 htab->sfpr->size = 0;
6348 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6349 if (!sfpr_define (info, &funcs[i]))
6350 return FALSE;
6351
6352 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6353
6354 if (htab->sfpr->size == 0)
6355 htab->sfpr->flags |= SEC_EXCLUDE;
6356
6357 return TRUE;
6358 }
6359
6360 /* Adjust a symbol defined by a dynamic object and referenced by a
6361 regular object. The current definition is in some section of the
6362 dynamic object, but we're not including those sections. We have to
6363 change the definition to something the rest of the link can
6364 understand. */
6365
6366 static bfd_boolean
6367 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6368 struct elf_link_hash_entry *h)
6369 {
6370 struct ppc_link_hash_table *htab;
6371 asection *s;
6372
6373 htab = ppc_hash_table (info);
6374 if (htab == NULL)
6375 return FALSE;
6376
6377 /* Deal with function syms. */
6378 if (h->type == STT_FUNC
6379 || h->type == STT_GNU_IFUNC
6380 || h->needs_plt)
6381 {
6382 /* Clear procedure linkage table information for any symbol that
6383 won't need a .plt entry. */
6384 struct plt_entry *ent;
6385 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6386 if (ent->plt.refcount > 0)
6387 break;
6388 if (ent == NULL
6389 || (h->type != STT_GNU_IFUNC
6390 && (SYMBOL_CALLS_LOCAL (info, h)
6391 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6392 && h->root.type == bfd_link_hash_undefweak))))
6393 {
6394 h->plt.plist = NULL;
6395 h->needs_plt = 0;
6396 }
6397 }
6398 else
6399 h->plt.plist = NULL;
6400
6401 /* If this is a weak symbol, and there is a real definition, the
6402 processor independent code will have arranged for us to see the
6403 real definition first, and we can just use the same value. */
6404 if (h->u.weakdef != NULL)
6405 {
6406 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6407 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6408 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6409 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6410 if (ELIMINATE_COPY_RELOCS)
6411 h->non_got_ref = h->u.weakdef->non_got_ref;
6412 return TRUE;
6413 }
6414
6415 /* If we are creating a shared library, we must presume that the
6416 only references to the symbol are via the global offset table.
6417 For such cases we need not do anything here; the relocations will
6418 be handled correctly by relocate_section. */
6419 if (info->shared)
6420 return TRUE;
6421
6422 /* If there are no references to this symbol that do not use the
6423 GOT, we don't need to generate a copy reloc. */
6424 if (!h->non_got_ref)
6425 return TRUE;
6426
6427 /* Don't generate a copy reloc for symbols defined in the executable. */
6428 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6429 return TRUE;
6430
6431 if (ELIMINATE_COPY_RELOCS)
6432 {
6433 struct ppc_link_hash_entry * eh;
6434 struct ppc_dyn_relocs *p;
6435
6436 eh = (struct ppc_link_hash_entry *) h;
6437 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6438 {
6439 s = p->sec->output_section;
6440 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6441 break;
6442 }
6443
6444 /* If we didn't find any dynamic relocs in read-only sections, then
6445 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6446 if (p == NULL)
6447 {
6448 h->non_got_ref = 0;
6449 return TRUE;
6450 }
6451 }
6452
6453 if (h->plt.plist != NULL)
6454 {
6455 /* We should never get here, but unfortunately there are versions
6456 of gcc out there that improperly (for this ABI) put initialized
6457 function pointers, vtable refs and suchlike in read-only
6458 sections. Allow them to proceed, but warn that this might
6459 break at runtime. */
6460 (*_bfd_error_handler)
6461 (_("copy reloc against `%s' requires lazy plt linking; "
6462 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6463 h->root.root.string);
6464 }
6465
6466 /* This is a reference to a symbol defined by a dynamic object which
6467 is not a function. */
6468
6469 if (h->size == 0)
6470 {
6471 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6472 h->root.root.string);
6473 return TRUE;
6474 }
6475
6476 /* We must allocate the symbol in our .dynbss section, which will
6477 become part of the .bss section of the executable. There will be
6478 an entry for this symbol in the .dynsym section. The dynamic
6479 object will contain position independent code, so all references
6480 from the dynamic object to this symbol will go through the global
6481 offset table. The dynamic linker will use the .dynsym entry to
6482 determine the address it must put in the global offset table, so
6483 both the dynamic object and the regular object will refer to the
6484 same memory location for the variable. */
6485
6486 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6487 to copy the initial value out of the dynamic object and into the
6488 runtime process image. We need to remember the offset into the
6489 .rela.bss section we are going to use. */
6490 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6491 {
6492 htab->relbss->size += sizeof (Elf64_External_Rela);
6493 h->needs_copy = 1;
6494 }
6495
6496 s = htab->dynbss;
6497
6498 return _bfd_elf_adjust_dynamic_copy (h, s);
6499 }
6500
6501 /* If given a function descriptor symbol, hide both the function code
6502 sym and the descriptor. */
6503 static void
6504 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6505 struct elf_link_hash_entry *h,
6506 bfd_boolean force_local)
6507 {
6508 struct ppc_link_hash_entry *eh;
6509 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6510
6511 eh = (struct ppc_link_hash_entry *) h;
6512 if (eh->is_func_descriptor)
6513 {
6514 struct ppc_link_hash_entry *fh = eh->oh;
6515
6516 if (fh == NULL)
6517 {
6518 const char *p, *q;
6519 struct ppc_link_hash_table *htab;
6520 char save;
6521
6522 /* We aren't supposed to use alloca in BFD because on
6523 systems which do not have alloca the version in libiberty
6524 calls xmalloc, which might cause the program to crash
6525 when it runs out of memory. This function doesn't have a
6526 return status, so there's no way to gracefully return an
6527 error. So cheat. We know that string[-1] can be safely
6528 accessed; It's either a string in an ELF string table,
6529 or allocated in an objalloc structure. */
6530
6531 p = eh->elf.root.root.string - 1;
6532 save = *p;
6533 *(char *) p = '.';
6534 htab = ppc_hash_table (info);
6535 if (htab == NULL)
6536 return;
6537
6538 fh = (struct ppc_link_hash_entry *)
6539 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6540 *(char *) p = save;
6541
6542 /* Unfortunately, if it so happens that the string we were
6543 looking for was allocated immediately before this string,
6544 then we overwrote the string terminator. That's the only
6545 reason the lookup should fail. */
6546 if (fh == NULL)
6547 {
6548 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6549 while (q >= eh->elf.root.root.string && *q == *p)
6550 --q, --p;
6551 if (q < eh->elf.root.root.string && *p == '.')
6552 fh = (struct ppc_link_hash_entry *)
6553 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6554 }
6555 if (fh != NULL)
6556 {
6557 eh->oh = fh;
6558 fh->oh = eh;
6559 }
6560 }
6561 if (fh != NULL)
6562 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6563 }
6564 }
6565
6566 static bfd_boolean
6567 get_sym_h (struct elf_link_hash_entry **hp,
6568 Elf_Internal_Sym **symp,
6569 asection **symsecp,
6570 char **tls_maskp,
6571 Elf_Internal_Sym **locsymsp,
6572 unsigned long r_symndx,
6573 bfd *ibfd)
6574 {
6575 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6576
6577 if (r_symndx >= symtab_hdr->sh_info)
6578 {
6579 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6580 struct elf_link_hash_entry *h;
6581
6582 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6583 h = elf_follow_link (h);
6584
6585 if (hp != NULL)
6586 *hp = h;
6587
6588 if (symp != NULL)
6589 *symp = NULL;
6590
6591 if (symsecp != NULL)
6592 {
6593 asection *symsec = NULL;
6594 if (h->root.type == bfd_link_hash_defined
6595 || h->root.type == bfd_link_hash_defweak)
6596 symsec = h->root.u.def.section;
6597 *symsecp = symsec;
6598 }
6599
6600 if (tls_maskp != NULL)
6601 {
6602 struct ppc_link_hash_entry *eh;
6603
6604 eh = (struct ppc_link_hash_entry *) h;
6605 *tls_maskp = &eh->tls_mask;
6606 }
6607 }
6608 else
6609 {
6610 Elf_Internal_Sym *sym;
6611 Elf_Internal_Sym *locsyms = *locsymsp;
6612
6613 if (locsyms == NULL)
6614 {
6615 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6616 if (locsyms == NULL)
6617 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6618 symtab_hdr->sh_info,
6619 0, NULL, NULL, NULL);
6620 if (locsyms == NULL)
6621 return FALSE;
6622 *locsymsp = locsyms;
6623 }
6624 sym = locsyms + r_symndx;
6625
6626 if (hp != NULL)
6627 *hp = NULL;
6628
6629 if (symp != NULL)
6630 *symp = sym;
6631
6632 if (symsecp != NULL)
6633 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6634
6635 if (tls_maskp != NULL)
6636 {
6637 struct got_entry **lgot_ents;
6638 char *tls_mask;
6639
6640 tls_mask = NULL;
6641 lgot_ents = elf_local_got_ents (ibfd);
6642 if (lgot_ents != NULL)
6643 {
6644 struct plt_entry **local_plt = (struct plt_entry **)
6645 (lgot_ents + symtab_hdr->sh_info);
6646 char *lgot_masks = (char *)
6647 (local_plt + symtab_hdr->sh_info);
6648 tls_mask = &lgot_masks[r_symndx];
6649 }
6650 *tls_maskp = tls_mask;
6651 }
6652 }
6653 return TRUE;
6654 }
6655
6656 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6657 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6658 type suitable for optimization, and 1 otherwise. */
6659
6660 static int
6661 get_tls_mask (char **tls_maskp,
6662 unsigned long *toc_symndx,
6663 bfd_vma *toc_addend,
6664 Elf_Internal_Sym **locsymsp,
6665 const Elf_Internal_Rela *rel,
6666 bfd *ibfd)
6667 {
6668 unsigned long r_symndx;
6669 int next_r;
6670 struct elf_link_hash_entry *h;
6671 Elf_Internal_Sym *sym;
6672 asection *sec;
6673 bfd_vma off;
6674
6675 r_symndx = ELF64_R_SYM (rel->r_info);
6676 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6677 return 0;
6678
6679 if ((*tls_maskp != NULL && **tls_maskp != 0)
6680 || sec == NULL
6681 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6682 return 1;
6683
6684 /* Look inside a TOC section too. */
6685 if (h != NULL)
6686 {
6687 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6688 off = h->root.u.def.value;
6689 }
6690 else
6691 off = sym->st_value;
6692 off += rel->r_addend;
6693 BFD_ASSERT (off % 8 == 0);
6694 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6695 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6696 if (toc_symndx != NULL)
6697 *toc_symndx = r_symndx;
6698 if (toc_addend != NULL)
6699 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6700 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6701 return 0;
6702 if ((h == NULL
6703 || ((h->root.type == bfd_link_hash_defined
6704 || h->root.type == bfd_link_hash_defweak)
6705 && !h->def_dynamic))
6706 && (next_r == -1 || next_r == -2))
6707 return 1 - next_r;
6708 return 1;
6709 }
6710
6711 /* Adjust all global syms defined in opd sections. In gcc generated
6712 code for the old ABI, these will already have been done. */
6713
6714 static bfd_boolean
6715 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6716 {
6717 struct ppc_link_hash_entry *eh;
6718 asection *sym_sec;
6719 struct _opd_sec_data *opd;
6720
6721 if (h->root.type == bfd_link_hash_indirect)
6722 return TRUE;
6723
6724 if (h->root.type == bfd_link_hash_warning)
6725 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6726
6727 if (h->root.type != bfd_link_hash_defined
6728 && h->root.type != bfd_link_hash_defweak)
6729 return TRUE;
6730
6731 eh = (struct ppc_link_hash_entry *) h;
6732 if (eh->adjust_done)
6733 return TRUE;
6734
6735 sym_sec = eh->elf.root.u.def.section;
6736 opd = get_opd_info (sym_sec);
6737 if (opd != NULL && opd->adjust != NULL)
6738 {
6739 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6740 if (adjust == -1)
6741 {
6742 /* This entry has been deleted. */
6743 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6744 if (dsec == NULL)
6745 {
6746 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6747 if (elf_discarded_section (dsec))
6748 {
6749 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6750 break;
6751 }
6752 }
6753 eh->elf.root.u.def.value = 0;
6754 eh->elf.root.u.def.section = dsec;
6755 }
6756 else
6757 eh->elf.root.u.def.value += adjust;
6758 eh->adjust_done = 1;
6759 }
6760 return TRUE;
6761 }
6762
6763 /* Handles decrementing dynamic reloc counts for the reloc specified by
6764 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6765 have already been determined. */
6766
6767 static bfd_boolean
6768 dec_dynrel_count (bfd_vma r_info,
6769 asection *sec,
6770 struct bfd_link_info *info,
6771 Elf_Internal_Sym **local_syms,
6772 struct elf_link_hash_entry *h,
6773 asection *sym_sec)
6774 {
6775 enum elf_ppc64_reloc_type r_type;
6776 struct ppc_dyn_relocs *p;
6777 struct ppc_dyn_relocs **pp;
6778
6779 /* Can this reloc be dynamic? This switch, and later tests here
6780 should be kept in sync with the code in check_relocs. */
6781 r_type = ELF64_R_TYPE (r_info);
6782 switch (r_type)
6783 {
6784 default:
6785 return TRUE;
6786
6787 case R_PPC64_TPREL16:
6788 case R_PPC64_TPREL16_LO:
6789 case R_PPC64_TPREL16_HI:
6790 case R_PPC64_TPREL16_HA:
6791 case R_PPC64_TPREL16_DS:
6792 case R_PPC64_TPREL16_LO_DS:
6793 case R_PPC64_TPREL16_HIGHER:
6794 case R_PPC64_TPREL16_HIGHERA:
6795 case R_PPC64_TPREL16_HIGHEST:
6796 case R_PPC64_TPREL16_HIGHESTA:
6797 if (!info->shared)
6798 return TRUE;
6799
6800 case R_PPC64_TPREL64:
6801 case R_PPC64_DTPMOD64:
6802 case R_PPC64_DTPREL64:
6803 case R_PPC64_ADDR64:
6804 case R_PPC64_REL30:
6805 case R_PPC64_REL32:
6806 case R_PPC64_REL64:
6807 case R_PPC64_ADDR14:
6808 case R_PPC64_ADDR14_BRNTAKEN:
6809 case R_PPC64_ADDR14_BRTAKEN:
6810 case R_PPC64_ADDR16:
6811 case R_PPC64_ADDR16_DS:
6812 case R_PPC64_ADDR16_HA:
6813 case R_PPC64_ADDR16_HI:
6814 case R_PPC64_ADDR16_HIGHER:
6815 case R_PPC64_ADDR16_HIGHERA:
6816 case R_PPC64_ADDR16_HIGHEST:
6817 case R_PPC64_ADDR16_HIGHESTA:
6818 case R_PPC64_ADDR16_LO:
6819 case R_PPC64_ADDR16_LO_DS:
6820 case R_PPC64_ADDR24:
6821 case R_PPC64_ADDR32:
6822 case R_PPC64_UADDR16:
6823 case R_PPC64_UADDR32:
6824 case R_PPC64_UADDR64:
6825 case R_PPC64_TOC:
6826 break;
6827 }
6828
6829 if (local_syms != NULL)
6830 {
6831 unsigned long r_symndx;
6832 Elf_Internal_Sym *sym;
6833 bfd *ibfd = sec->owner;
6834
6835 r_symndx = ELF64_R_SYM (r_info);
6836 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6837 return FALSE;
6838 }
6839
6840 if ((info->shared
6841 && (must_be_dyn_reloc (info, r_type)
6842 || (h != NULL
6843 && (!info->symbolic
6844 || h->root.type == bfd_link_hash_defweak
6845 || !h->def_regular))))
6846 || (ELIMINATE_COPY_RELOCS
6847 && !info->shared
6848 && h != NULL
6849 && (h->root.type == bfd_link_hash_defweak
6850 || !h->def_regular)))
6851 ;
6852 else
6853 return TRUE;
6854
6855 if (h != NULL)
6856 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6857 else
6858 {
6859 if (sym_sec != NULL)
6860 {
6861 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6862 pp = (struct ppc_dyn_relocs **) vpp;
6863 }
6864 else
6865 {
6866 void *vpp = &elf_section_data (sec)->local_dynrel;
6867 pp = (struct ppc_dyn_relocs **) vpp;
6868 }
6869
6870 /* elf_gc_sweep may have already removed all dyn relocs associated
6871 with local syms for a given section. Don't report a dynreloc
6872 miscount. */
6873 if (*pp == NULL)
6874 return TRUE;
6875 }
6876
6877 while ((p = *pp) != NULL)
6878 {
6879 if (p->sec == sec)
6880 {
6881 if (!must_be_dyn_reloc (info, r_type))
6882 p->pc_count -= 1;
6883 p->count -= 1;
6884 if (p->count == 0)
6885 *pp = p->next;
6886 return TRUE;
6887 }
6888 pp = &p->next;
6889 }
6890
6891 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6892 sec->owner, sec);
6893 bfd_set_error (bfd_error_bad_value);
6894 return FALSE;
6895 }
6896
6897 /* Remove unused Official Procedure Descriptor entries. Currently we
6898 only remove those associated with functions in discarded link-once
6899 sections, or weakly defined functions that have been overridden. It
6900 would be possible to remove many more entries for statically linked
6901 applications. */
6902
6903 bfd_boolean
6904 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6905 {
6906 bfd *ibfd;
6907 bfd_boolean some_edited = FALSE;
6908 asection *need_pad = NULL;
6909
6910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6911 {
6912 asection *sec;
6913 Elf_Internal_Rela *relstart, *rel, *relend;
6914 Elf_Internal_Shdr *symtab_hdr;
6915 Elf_Internal_Sym *local_syms;
6916 struct elf_link_hash_entry **sym_hashes;
6917 bfd_vma offset;
6918 struct _opd_sec_data *opd;
6919 bfd_boolean need_edit, add_aux_fields;
6920 bfd_size_type cnt_16b = 0;
6921
6922 sec = bfd_get_section_by_name (ibfd, ".opd");
6923 if (sec == NULL || sec->size == 0)
6924 continue;
6925
6926 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6927 continue;
6928
6929 if (sec->output_section == bfd_abs_section_ptr)
6930 continue;
6931
6932 /* Look through the section relocs. */
6933 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6934 continue;
6935
6936 local_syms = NULL;
6937 symtab_hdr = &elf_symtab_hdr (ibfd);
6938 sym_hashes = elf_sym_hashes (ibfd);
6939
6940 /* Read the relocations. */
6941 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6942 info->keep_memory);
6943 if (relstart == NULL)
6944 return FALSE;
6945
6946 /* First run through the relocs to check they are sane, and to
6947 determine whether we need to edit this opd section. */
6948 need_edit = FALSE;
6949 need_pad = sec;
6950 offset = 0;
6951 relend = relstart + sec->reloc_count;
6952 for (rel = relstart; rel < relend; )
6953 {
6954 enum elf_ppc64_reloc_type r_type;
6955 unsigned long r_symndx;
6956 asection *sym_sec;
6957 struct elf_link_hash_entry *h;
6958 Elf_Internal_Sym *sym;
6959
6960 /* .opd contains a regular array of 16 or 24 byte entries. We're
6961 only interested in the reloc pointing to a function entry
6962 point. */
6963 if (rel->r_offset != offset
6964 || rel + 1 >= relend
6965 || (rel + 1)->r_offset != offset + 8)
6966 {
6967 /* If someone messes with .opd alignment then after a
6968 "ld -r" we might have padding in the middle of .opd.
6969 Also, there's nothing to prevent someone putting
6970 something silly in .opd with the assembler. No .opd
6971 optimization for them! */
6972 broken_opd:
6973 (*_bfd_error_handler)
6974 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6975 need_edit = FALSE;
6976 break;
6977 }
6978
6979 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6980 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6981 {
6982 (*_bfd_error_handler)
6983 (_("%B: unexpected reloc type %u in .opd section"),
6984 ibfd, r_type);
6985 need_edit = FALSE;
6986 break;
6987 }
6988
6989 r_symndx = ELF64_R_SYM (rel->r_info);
6990 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6991 r_symndx, ibfd))
6992 goto error_ret;
6993
6994 if (sym_sec == NULL || sym_sec->owner == NULL)
6995 {
6996 const char *sym_name;
6997 if (h != NULL)
6998 sym_name = h->root.root.string;
6999 else
7000 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7001 sym_sec);
7002
7003 (*_bfd_error_handler)
7004 (_("%B: undefined sym `%s' in .opd section"),
7005 ibfd, sym_name);
7006 need_edit = FALSE;
7007 break;
7008 }
7009
7010 /* opd entries are always for functions defined in the
7011 current input bfd. If the symbol isn't defined in the
7012 input bfd, then we won't be using the function in this
7013 bfd; It must be defined in a linkonce section in another
7014 bfd, or is weak. It's also possible that we are
7015 discarding the function due to a linker script /DISCARD/,
7016 which we test for via the output_section. */
7017 if (sym_sec->owner != ibfd
7018 || sym_sec->output_section == bfd_abs_section_ptr)
7019 need_edit = TRUE;
7020
7021 rel += 2;
7022 if (rel == relend
7023 || (rel + 1 == relend && rel->r_offset == offset + 16))
7024 {
7025 if (sec->size == offset + 24)
7026 {
7027 need_pad = NULL;
7028 break;
7029 }
7030 if (rel == relend && sec->size == offset + 16)
7031 {
7032 cnt_16b++;
7033 break;
7034 }
7035 goto broken_opd;
7036 }
7037
7038 if (rel->r_offset == offset + 24)
7039 offset += 24;
7040 else if (rel->r_offset != offset + 16)
7041 goto broken_opd;
7042 else if (rel + 1 < relend
7043 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7044 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7045 {
7046 offset += 16;
7047 cnt_16b++;
7048 }
7049 else if (rel + 2 < relend
7050 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7051 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7052 {
7053 offset += 24;
7054 rel += 1;
7055 }
7056 else
7057 goto broken_opd;
7058 }
7059
7060 add_aux_fields = non_overlapping && cnt_16b > 0;
7061
7062 if (need_edit || add_aux_fields)
7063 {
7064 Elf_Internal_Rela *write_rel;
7065 bfd_byte *rptr, *wptr;
7066 bfd_byte *new_contents;
7067 bfd_boolean skip;
7068 long opd_ent_size;
7069 bfd_size_type amt;
7070
7071 new_contents = NULL;
7072 amt = sec->size * sizeof (long) / 8;
7073 opd = &ppc64_elf_section_data (sec)->u.opd;
7074 opd->adjust = bfd_zalloc (sec->owner, amt);
7075 if (opd->adjust == NULL)
7076 return FALSE;
7077 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7078
7079 /* This seems a waste of time as input .opd sections are all
7080 zeros as generated by gcc, but I suppose there's no reason
7081 this will always be so. We might start putting something in
7082 the third word of .opd entries. */
7083 if ((sec->flags & SEC_IN_MEMORY) == 0)
7084 {
7085 bfd_byte *loc;
7086 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7087 {
7088 if (loc != NULL)
7089 free (loc);
7090 error_ret:
7091 if (local_syms != NULL
7092 && symtab_hdr->contents != (unsigned char *) local_syms)
7093 free (local_syms);
7094 if (elf_section_data (sec)->relocs != relstart)
7095 free (relstart);
7096 return FALSE;
7097 }
7098 sec->contents = loc;
7099 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7100 }
7101
7102 elf_section_data (sec)->relocs = relstart;
7103
7104 new_contents = sec->contents;
7105 if (add_aux_fields)
7106 {
7107 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7108 if (new_contents == NULL)
7109 return FALSE;
7110 need_pad = FALSE;
7111 }
7112 wptr = new_contents;
7113 rptr = sec->contents;
7114
7115 write_rel = relstart;
7116 skip = FALSE;
7117 offset = 0;
7118 opd_ent_size = 0;
7119 for (rel = relstart; rel < relend; rel++)
7120 {
7121 unsigned long r_symndx;
7122 asection *sym_sec;
7123 struct elf_link_hash_entry *h;
7124 Elf_Internal_Sym *sym;
7125
7126 r_symndx = ELF64_R_SYM (rel->r_info);
7127 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7128 r_symndx, ibfd))
7129 goto error_ret;
7130
7131 if (rel->r_offset == offset)
7132 {
7133 struct ppc_link_hash_entry *fdh = NULL;
7134
7135 /* See if the .opd entry is full 24 byte or
7136 16 byte (with fd_aux entry overlapped with next
7137 fd_func). */
7138 opd_ent_size = 24;
7139 if ((rel + 2 == relend && sec->size == offset + 16)
7140 || (rel + 3 < relend
7141 && rel[2].r_offset == offset + 16
7142 && rel[3].r_offset == offset + 24
7143 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7144 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7145 opd_ent_size = 16;
7146
7147 if (h != NULL
7148 && h->root.root.string[0] == '.')
7149 {
7150 struct ppc_link_hash_table *htab;
7151
7152 htab = ppc_hash_table (info);
7153 if (htab != NULL)
7154 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7155 htab);
7156 if (fdh != NULL
7157 && fdh->elf.root.type != bfd_link_hash_defined
7158 && fdh->elf.root.type != bfd_link_hash_defweak)
7159 fdh = NULL;
7160 }
7161
7162 skip = (sym_sec->owner != ibfd
7163 || sym_sec->output_section == bfd_abs_section_ptr);
7164 if (skip)
7165 {
7166 if (fdh != NULL && sym_sec->owner == ibfd)
7167 {
7168 /* Arrange for the function descriptor sym
7169 to be dropped. */
7170 fdh->elf.root.u.def.value = 0;
7171 fdh->elf.root.u.def.section = sym_sec;
7172 }
7173 opd->adjust[rel->r_offset / 8] = -1;
7174 }
7175 else
7176 {
7177 /* We'll be keeping this opd entry. */
7178
7179 if (fdh != NULL)
7180 {
7181 /* Redefine the function descriptor symbol to
7182 this location in the opd section. It is
7183 necessary to update the value here rather
7184 than using an array of adjustments as we do
7185 for local symbols, because various places
7186 in the generic ELF code use the value
7187 stored in u.def.value. */
7188 fdh->elf.root.u.def.value = wptr - new_contents;
7189 fdh->adjust_done = 1;
7190 }
7191
7192 /* Local syms are a bit tricky. We could
7193 tweak them as they can be cached, but
7194 we'd need to look through the local syms
7195 for the function descriptor sym which we
7196 don't have at the moment. So keep an
7197 array of adjustments. */
7198 opd->adjust[rel->r_offset / 8]
7199 = (wptr - new_contents) - (rptr - sec->contents);
7200
7201 if (wptr != rptr)
7202 memcpy (wptr, rptr, opd_ent_size);
7203 wptr += opd_ent_size;
7204 if (add_aux_fields && opd_ent_size == 16)
7205 {
7206 memset (wptr, '\0', 8);
7207 wptr += 8;
7208 }
7209 }
7210 rptr += opd_ent_size;
7211 offset += opd_ent_size;
7212 }
7213
7214 if (skip)
7215 {
7216 if (!NO_OPD_RELOCS
7217 && !info->relocatable
7218 && !dec_dynrel_count (rel->r_info, sec, info,
7219 NULL, h, sym_sec))
7220 goto error_ret;
7221 }
7222 else
7223 {
7224 /* We need to adjust any reloc offsets to point to the
7225 new opd entries. While we're at it, we may as well
7226 remove redundant relocs. */
7227 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7228 if (write_rel != rel)
7229 memcpy (write_rel, rel, sizeof (*rel));
7230 ++write_rel;
7231 }
7232 }
7233
7234 sec->size = wptr - new_contents;
7235 sec->reloc_count = write_rel - relstart;
7236 if (add_aux_fields)
7237 {
7238 free (sec->contents);
7239 sec->contents = new_contents;
7240 }
7241
7242 /* Fudge the header size too, as this is used later in
7243 elf_bfd_final_link if we are emitting relocs. */
7244 elf_section_data (sec)->rel_hdr.sh_size
7245 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7246 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7247 some_edited = TRUE;
7248 }
7249 else if (elf_section_data (sec)->relocs != relstart)
7250 free (relstart);
7251
7252 if (local_syms != NULL
7253 && symtab_hdr->contents != (unsigned char *) local_syms)
7254 {
7255 if (!info->keep_memory)
7256 free (local_syms);
7257 else
7258 symtab_hdr->contents = (unsigned char *) local_syms;
7259 }
7260 }
7261
7262 if (some_edited)
7263 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7264
7265 /* If we are doing a final link and the last .opd entry is just 16 byte
7266 long, add a 8 byte padding after it. */
7267 if (need_pad != NULL && !info->relocatable)
7268 {
7269 bfd_byte *p;
7270
7271 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7272 {
7273 BFD_ASSERT (need_pad->size > 0);
7274
7275 p = bfd_malloc (need_pad->size + 8);
7276 if (p == NULL)
7277 return FALSE;
7278
7279 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7280 p, 0, need_pad->size))
7281 return FALSE;
7282
7283 need_pad->contents = p;
7284 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7285 }
7286 else
7287 {
7288 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7289 if (p == NULL)
7290 return FALSE;
7291
7292 need_pad->contents = p;
7293 }
7294
7295 memset (need_pad->contents + need_pad->size, 0, 8);
7296 need_pad->size += 8;
7297 }
7298
7299 return TRUE;
7300 }
7301
7302 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7303
7304 asection *
7305 ppc64_elf_tls_setup (struct bfd_link_info *info,
7306 int no_tls_get_addr_opt,
7307 int *no_multi_toc)
7308 {
7309 struct ppc_link_hash_table *htab;
7310
7311 htab = ppc_hash_table (info);
7312 if (htab == NULL)
7313 return NULL;
7314
7315 if (*no_multi_toc)
7316 htab->do_multi_toc = 0;
7317 else if (!htab->do_multi_toc)
7318 *no_multi_toc = 1;
7319
7320 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7321 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7322 FALSE, FALSE, TRUE));
7323 /* Move dynamic linking info to the function descriptor sym. */
7324 if (htab->tls_get_addr != NULL)
7325 func_desc_adjust (&htab->tls_get_addr->elf, info);
7326 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7327 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7328 FALSE, FALSE, TRUE));
7329 if (!no_tls_get_addr_opt)
7330 {
7331 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7332
7333 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7334 FALSE, FALSE, TRUE);
7335 if (opt != NULL)
7336 func_desc_adjust (opt, info);
7337 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7338 FALSE, FALSE, TRUE);
7339 if (opt_fd != NULL
7340 && (opt_fd->root.type == bfd_link_hash_defined
7341 || opt_fd->root.type == bfd_link_hash_defweak))
7342 {
7343 /* If glibc supports an optimized __tls_get_addr call stub,
7344 signalled by the presence of __tls_get_addr_opt, and we'll
7345 be calling __tls_get_addr via a plt call stub, then
7346 make __tls_get_addr point to __tls_get_addr_opt. */
7347 tga_fd = &htab->tls_get_addr_fd->elf;
7348 if (htab->elf.dynamic_sections_created
7349 && tga_fd != NULL
7350 && (tga_fd->type == STT_FUNC
7351 || tga_fd->needs_plt)
7352 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7353 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7354 && tga_fd->root.type == bfd_link_hash_undefweak)))
7355 {
7356 struct plt_entry *ent;
7357
7358 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7359 if (ent->plt.refcount > 0)
7360 break;
7361 if (ent != NULL)
7362 {
7363 tga_fd->root.type = bfd_link_hash_indirect;
7364 tga_fd->root.u.i.link = &opt_fd->root;
7365 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7366 if (opt_fd->dynindx != -1)
7367 {
7368 /* Use __tls_get_addr_opt in dynamic relocations. */
7369 opt_fd->dynindx = -1;
7370 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7371 opt_fd->dynstr_index);
7372 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7373 return FALSE;
7374 }
7375 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7376 tga = &htab->tls_get_addr->elf;
7377 if (opt != NULL && tga != NULL)
7378 {
7379 tga->root.type = bfd_link_hash_indirect;
7380 tga->root.u.i.link = &opt->root;
7381 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7382 _bfd_elf_link_hash_hide_symbol (info, opt,
7383 tga->forced_local);
7384 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7385 }
7386 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7387 htab->tls_get_addr_fd->is_func_descriptor = 1;
7388 if (htab->tls_get_addr != NULL)
7389 {
7390 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7391 htab->tls_get_addr->is_func = 1;
7392 }
7393 }
7394 }
7395 }
7396 else
7397 no_tls_get_addr_opt = TRUE;
7398 }
7399 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7400 return _bfd_elf_tls_setup (info->output_bfd, info);
7401 }
7402
7403 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7404 HASH1 or HASH2. */
7405
7406 static bfd_boolean
7407 branch_reloc_hash_match (const bfd *ibfd,
7408 const Elf_Internal_Rela *rel,
7409 const struct ppc_link_hash_entry *hash1,
7410 const struct ppc_link_hash_entry *hash2)
7411 {
7412 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7413 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7414 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7415
7416 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7417 {
7418 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7419 struct elf_link_hash_entry *h;
7420
7421 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7422 h = elf_follow_link (h);
7423 if (h == &hash1->elf || h == &hash2->elf)
7424 return TRUE;
7425 }
7426 return FALSE;
7427 }
7428
7429 /* Run through all the TLS relocs looking for optimization
7430 opportunities. The linker has been hacked (see ppc64elf.em) to do
7431 a preliminary section layout so that we know the TLS segment
7432 offsets. We can't optimize earlier because some optimizations need
7433 to know the tp offset, and we need to optimize before allocating
7434 dynamic relocations. */
7435
7436 bfd_boolean
7437 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7438 {
7439 bfd *ibfd;
7440 asection *sec;
7441 struct ppc_link_hash_table *htab;
7442 int pass;
7443
7444 if (info->relocatable || !info->executable)
7445 return TRUE;
7446
7447 htab = ppc_hash_table (info);
7448 if (htab == NULL)
7449 return FALSE;
7450
7451 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7452 {
7453 Elf_Internal_Sym *locsyms = NULL;
7454 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7455 unsigned char *toc_ref = NULL;
7456
7457 /* Look at all the sections for this file. Make two passes over
7458 the relocs. On the first pass, mark toc entries involved
7459 with tls relocs, and check that tls relocs involved in
7460 setting up a tls_get_addr call are indeed followed by such a
7461 call. If they are not, exclude them from the optimizations
7462 done on the second pass. */
7463 for (pass = 0; pass < 2; ++pass)
7464 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7465 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7466 {
7467 Elf_Internal_Rela *relstart, *rel, *relend;
7468
7469 /* Read the relocations. */
7470 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7471 info->keep_memory);
7472 if (relstart == NULL)
7473 return FALSE;
7474
7475 relend = relstart + sec->reloc_count;
7476 for (rel = relstart; rel < relend; rel++)
7477 {
7478 enum elf_ppc64_reloc_type r_type;
7479 unsigned long r_symndx;
7480 struct elf_link_hash_entry *h;
7481 Elf_Internal_Sym *sym;
7482 asection *sym_sec;
7483 char *tls_mask;
7484 char tls_set, tls_clear, tls_type = 0;
7485 bfd_vma value;
7486 bfd_boolean ok_tprel, is_local;
7487 long toc_ref_index = 0;
7488 int expecting_tls_get_addr = 0;
7489
7490 r_symndx = ELF64_R_SYM (rel->r_info);
7491 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7492 r_symndx, ibfd))
7493 {
7494 err_free_rel:
7495 if (elf_section_data (sec)->relocs != relstart)
7496 free (relstart);
7497 if (toc_ref != NULL)
7498 free (toc_ref);
7499 if (locsyms != NULL
7500 && (elf_symtab_hdr (ibfd).contents
7501 != (unsigned char *) locsyms))
7502 free (locsyms);
7503 return FALSE;
7504 }
7505
7506 if (h != NULL)
7507 {
7508 if (h->root.type == bfd_link_hash_defined
7509 || h->root.type == bfd_link_hash_defweak)
7510 value = h->root.u.def.value;
7511 else if (h->root.type == bfd_link_hash_undefweak)
7512 value = 0;
7513 else
7514 continue;
7515 }
7516 else
7517 /* Symbols referenced by TLS relocs must be of type
7518 STT_TLS. So no need for .opd local sym adjust. */
7519 value = sym->st_value;
7520
7521 ok_tprel = FALSE;
7522 is_local = FALSE;
7523 if (h == NULL
7524 || !h->def_dynamic)
7525 {
7526 is_local = TRUE;
7527 if (h != NULL
7528 && h->root.type == bfd_link_hash_undefweak)
7529 ok_tprel = TRUE;
7530 else
7531 {
7532 value += sym_sec->output_offset;
7533 value += sym_sec->output_section->vma;
7534 value -= htab->elf.tls_sec->vma;
7535 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7536 < (bfd_vma) 1 << 32);
7537 }
7538 }
7539
7540 r_type = ELF64_R_TYPE (rel->r_info);
7541 switch (r_type)
7542 {
7543 case R_PPC64_GOT_TLSLD16:
7544 case R_PPC64_GOT_TLSLD16_LO:
7545 expecting_tls_get_addr = 1;
7546 /* Fall thru */
7547
7548 case R_PPC64_GOT_TLSLD16_HI:
7549 case R_PPC64_GOT_TLSLD16_HA:
7550 /* These relocs should never be against a symbol
7551 defined in a shared lib. Leave them alone if
7552 that turns out to be the case. */
7553 if (!is_local)
7554 continue;
7555
7556 /* LD -> LE */
7557 tls_set = 0;
7558 tls_clear = TLS_LD;
7559 tls_type = TLS_TLS | TLS_LD;
7560 break;
7561
7562 case R_PPC64_GOT_TLSGD16:
7563 case R_PPC64_GOT_TLSGD16_LO:
7564 expecting_tls_get_addr = 1;
7565 /* Fall thru */
7566
7567 case R_PPC64_GOT_TLSGD16_HI:
7568 case R_PPC64_GOT_TLSGD16_HA:
7569 if (ok_tprel)
7570 /* GD -> LE */
7571 tls_set = 0;
7572 else
7573 /* GD -> IE */
7574 tls_set = TLS_TLS | TLS_TPRELGD;
7575 tls_clear = TLS_GD;
7576 tls_type = TLS_TLS | TLS_GD;
7577 break;
7578
7579 case R_PPC64_GOT_TPREL16_DS:
7580 case R_PPC64_GOT_TPREL16_LO_DS:
7581 case R_PPC64_GOT_TPREL16_HI:
7582 case R_PPC64_GOT_TPREL16_HA:
7583 if (ok_tprel)
7584 {
7585 /* IE -> LE */
7586 tls_set = 0;
7587 tls_clear = TLS_TPREL;
7588 tls_type = TLS_TLS | TLS_TPREL;
7589 break;
7590 }
7591 continue;
7592
7593 case R_PPC64_TOC16:
7594 case R_PPC64_TOC16_LO:
7595 case R_PPC64_TLS:
7596 case R_PPC64_TLSGD:
7597 case R_PPC64_TLSLD:
7598 if (sym_sec == NULL || sym_sec != toc)
7599 continue;
7600
7601 /* Mark this toc entry as referenced by a TLS
7602 code sequence. We can do that now in the
7603 case of R_PPC64_TLS, and after checking for
7604 tls_get_addr for the TOC16 relocs. */
7605 if (toc_ref == NULL)
7606 {
7607 toc_ref = bfd_zmalloc (toc->size / 8);
7608 if (toc_ref == NULL)
7609 goto err_free_rel;
7610 }
7611 if (h != NULL)
7612 value = h->root.u.def.value;
7613 else
7614 value = sym->st_value;
7615 value += rel->r_addend;
7616 BFD_ASSERT (value < toc->size && value % 8 == 0);
7617 toc_ref_index = value / 8;
7618 if (r_type == R_PPC64_TLS
7619 || r_type == R_PPC64_TLSGD
7620 || r_type == R_PPC64_TLSLD)
7621 {
7622 toc_ref[toc_ref_index] = 1;
7623 continue;
7624 }
7625
7626 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7627 continue;
7628
7629 tls_set = 0;
7630 tls_clear = 0;
7631 expecting_tls_get_addr = 2;
7632 break;
7633
7634 case R_PPC64_TPREL64:
7635 if (pass == 0
7636 || sec != toc
7637 || toc_ref == NULL
7638 || !toc_ref[rel->r_offset / 8])
7639 continue;
7640 if (ok_tprel)
7641 {
7642 /* IE -> LE */
7643 tls_set = TLS_EXPLICIT;
7644 tls_clear = TLS_TPREL;
7645 break;
7646 }
7647 continue;
7648
7649 case R_PPC64_DTPMOD64:
7650 if (pass == 0
7651 || sec != toc
7652 || toc_ref == NULL
7653 || !toc_ref[rel->r_offset / 8])
7654 continue;
7655 if (rel + 1 < relend
7656 && (rel[1].r_info
7657 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7658 && rel[1].r_offset == rel->r_offset + 8)
7659 {
7660 if (ok_tprel)
7661 /* GD -> LE */
7662 tls_set = TLS_EXPLICIT | TLS_GD;
7663 else
7664 /* GD -> IE */
7665 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7666 tls_clear = TLS_GD;
7667 }
7668 else
7669 {
7670 if (!is_local)
7671 continue;
7672
7673 /* LD -> LE */
7674 tls_set = TLS_EXPLICIT;
7675 tls_clear = TLS_LD;
7676 }
7677 break;
7678
7679 default:
7680 continue;
7681 }
7682
7683 if (pass == 0)
7684 {
7685 if (!expecting_tls_get_addr
7686 || !sec->has_tls_get_addr_call)
7687 continue;
7688
7689 if (rel + 1 < relend
7690 && branch_reloc_hash_match (ibfd, rel + 1,
7691 htab->tls_get_addr,
7692 htab->tls_get_addr_fd))
7693 {
7694 if (expecting_tls_get_addr == 2)
7695 {
7696 /* Check for toc tls entries. */
7697 char *toc_tls;
7698 int retval;
7699
7700 retval = get_tls_mask (&toc_tls, NULL, NULL,
7701 &locsyms,
7702 rel, ibfd);
7703 if (retval == 0)
7704 goto err_free_rel;
7705 if (retval > 1 && toc_tls != NULL)
7706 toc_ref[toc_ref_index] = 1;
7707 }
7708 continue;
7709 }
7710
7711 if (expecting_tls_get_addr != 1)
7712 continue;
7713
7714 /* Uh oh, we didn't find the expected call. We
7715 could just mark this symbol to exclude it
7716 from tls optimization but it's safer to skip
7717 the entire section. */
7718 sec->has_tls_reloc = 0;
7719 break;
7720 }
7721
7722 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7723 {
7724 struct plt_entry *ent;
7725 for (ent = htab->tls_get_addr->elf.plt.plist;
7726 ent != NULL;
7727 ent = ent->next)
7728 if (ent->addend == 0)
7729 {
7730 if (ent->plt.refcount > 0)
7731 {
7732 ent->plt.refcount -= 1;
7733 expecting_tls_get_addr = 0;
7734 }
7735 break;
7736 }
7737 }
7738
7739 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7740 {
7741 struct plt_entry *ent;
7742 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7743 ent != NULL;
7744 ent = ent->next)
7745 if (ent->addend == 0)
7746 {
7747 if (ent->plt.refcount > 0)
7748 ent->plt.refcount -= 1;
7749 break;
7750 }
7751 }
7752
7753 if (tls_clear == 0)
7754 continue;
7755
7756 if ((tls_set & TLS_EXPLICIT) == 0)
7757 {
7758 struct got_entry *ent;
7759
7760 /* Adjust got entry for this reloc. */
7761 if (h != NULL)
7762 ent = h->got.glist;
7763 else
7764 ent = elf_local_got_ents (ibfd)[r_symndx];
7765
7766 for (; ent != NULL; ent = ent->next)
7767 if (ent->addend == rel->r_addend
7768 && ent->owner == ibfd
7769 && ent->tls_type == tls_type)
7770 break;
7771 if (ent == NULL)
7772 abort ();
7773
7774 if (tls_set == 0)
7775 {
7776 /* We managed to get rid of a got entry. */
7777 if (ent->got.refcount > 0)
7778 ent->got.refcount -= 1;
7779 }
7780 }
7781 else
7782 {
7783 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7784 we'll lose one or two dyn relocs. */
7785 if (!dec_dynrel_count (rel->r_info, sec, info,
7786 NULL, h, sym_sec))
7787 return FALSE;
7788
7789 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7790 {
7791 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7792 NULL, h, sym_sec))
7793 return FALSE;
7794 }
7795 }
7796
7797 *tls_mask |= tls_set;
7798 *tls_mask &= ~tls_clear;
7799 }
7800
7801 if (elf_section_data (sec)->relocs != relstart)
7802 free (relstart);
7803 }
7804
7805 if (toc_ref != NULL)
7806 free (toc_ref);
7807
7808 if (locsyms != NULL
7809 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7810 {
7811 if (!info->keep_memory)
7812 free (locsyms);
7813 else
7814 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7815 }
7816 }
7817 return TRUE;
7818 }
7819
7820 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7821 the values of any global symbols in a toc section that has been
7822 edited. Globals in toc sections should be a rarity, so this function
7823 sets a flag if any are found in toc sections other than the one just
7824 edited, so that futher hash table traversals can be avoided. */
7825
7826 struct adjust_toc_info
7827 {
7828 asection *toc;
7829 unsigned long *skip;
7830 bfd_boolean global_toc_syms;
7831 };
7832
7833 static bfd_boolean
7834 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7835 {
7836 struct ppc_link_hash_entry *eh;
7837 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7838
7839 if (h->root.type == bfd_link_hash_indirect)
7840 return TRUE;
7841
7842 if (h->root.type == bfd_link_hash_warning)
7843 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7844
7845 if (h->root.type != bfd_link_hash_defined
7846 && h->root.type != bfd_link_hash_defweak)
7847 return TRUE;
7848
7849 eh = (struct ppc_link_hash_entry *) h;
7850 if (eh->adjust_done)
7851 return TRUE;
7852
7853 if (eh->elf.root.u.def.section == toc_inf->toc)
7854 {
7855 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7856 if (skip != (unsigned long) -1)
7857 eh->elf.root.u.def.value -= skip;
7858 else
7859 {
7860 (*_bfd_error_handler)
7861 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7862 eh->elf.root.u.def.section = &bfd_abs_section;
7863 eh->elf.root.u.def.value = 0;
7864 }
7865 eh->adjust_done = 1;
7866 }
7867 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7868 toc_inf->global_toc_syms = TRUE;
7869
7870 return TRUE;
7871 }
7872
7873 /* Examine all relocs referencing .toc sections in order to remove
7874 unused .toc entries. */
7875
7876 bfd_boolean
7877 ppc64_elf_edit_toc (struct bfd_link_info *info)
7878 {
7879 bfd *ibfd;
7880 struct adjust_toc_info toc_inf;
7881
7882 toc_inf.global_toc_syms = TRUE;
7883 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7884 {
7885 asection *toc, *sec;
7886 Elf_Internal_Shdr *symtab_hdr;
7887 Elf_Internal_Sym *local_syms;
7888 struct elf_link_hash_entry **sym_hashes;
7889 Elf_Internal_Rela *relstart, *rel;
7890 unsigned long *skip, *drop;
7891 unsigned char *used;
7892 unsigned char *keep, last, some_unused;
7893
7894 toc = bfd_get_section_by_name (ibfd, ".toc");
7895 if (toc == NULL
7896 || toc->size == 0
7897 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7898 || elf_discarded_section (toc))
7899 continue;
7900
7901 local_syms = NULL;
7902 symtab_hdr = &elf_symtab_hdr (ibfd);
7903 sym_hashes = elf_sym_hashes (ibfd);
7904
7905 /* Look at sections dropped from the final link. */
7906 skip = NULL;
7907 relstart = NULL;
7908 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7909 {
7910 if (sec->reloc_count == 0
7911 || !elf_discarded_section (sec)
7912 || get_opd_info (sec)
7913 || (sec->flags & SEC_ALLOC) == 0
7914 || (sec->flags & SEC_DEBUGGING) != 0)
7915 continue;
7916
7917 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7918 if (relstart == NULL)
7919 goto error_ret;
7920
7921 /* Run through the relocs to see which toc entries might be
7922 unused. */
7923 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7924 {
7925 enum elf_ppc64_reloc_type r_type;
7926 unsigned long r_symndx;
7927 asection *sym_sec;
7928 struct elf_link_hash_entry *h;
7929 Elf_Internal_Sym *sym;
7930 bfd_vma val;
7931
7932 r_type = ELF64_R_TYPE (rel->r_info);
7933 switch (r_type)
7934 {
7935 default:
7936 continue;
7937
7938 case R_PPC64_TOC16:
7939 case R_PPC64_TOC16_LO:
7940 case R_PPC64_TOC16_HI:
7941 case R_PPC64_TOC16_HA:
7942 case R_PPC64_TOC16_DS:
7943 case R_PPC64_TOC16_LO_DS:
7944 break;
7945 }
7946
7947 r_symndx = ELF64_R_SYM (rel->r_info);
7948 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7949 r_symndx, ibfd))
7950 goto error_ret;
7951
7952 if (sym_sec != toc)
7953 continue;
7954
7955 if (h != NULL)
7956 val = h->root.u.def.value;
7957 else
7958 val = sym->st_value;
7959 val += rel->r_addend;
7960
7961 if (val >= toc->size)
7962 continue;
7963
7964 /* Anything in the toc ought to be aligned to 8 bytes.
7965 If not, don't mark as unused. */
7966 if (val & 7)
7967 continue;
7968
7969 if (skip == NULL)
7970 {
7971 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7972 if (skip == NULL)
7973 goto error_ret;
7974 }
7975
7976 skip[val >> 3] = 1;
7977 }
7978
7979 if (elf_section_data (sec)->relocs != relstart)
7980 free (relstart);
7981 }
7982
7983 if (skip == NULL)
7984 continue;
7985
7986 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7987 if (used == NULL)
7988 {
7989 error_ret:
7990 if (local_syms != NULL
7991 && symtab_hdr->contents != (unsigned char *) local_syms)
7992 free (local_syms);
7993 if (sec != NULL
7994 && relstart != NULL
7995 && elf_section_data (sec)->relocs != relstart)
7996 free (relstart);
7997 if (skip != NULL)
7998 free (skip);
7999 return FALSE;
8000 }
8001
8002 /* Now check all kept sections that might reference the toc.
8003 Check the toc itself last. */
8004 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8005 : ibfd->sections);
8006 sec != NULL;
8007 sec = (sec == toc ? NULL
8008 : sec->next == NULL ? toc
8009 : sec->next == toc && toc->next ? toc->next
8010 : sec->next))
8011 {
8012 int repeat;
8013
8014 if (sec->reloc_count == 0
8015 || elf_discarded_section (sec)
8016 || get_opd_info (sec)
8017 || (sec->flags & SEC_ALLOC) == 0
8018 || (sec->flags & SEC_DEBUGGING) != 0)
8019 continue;
8020
8021 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
8022 if (relstart == NULL)
8023 goto error_ret;
8024
8025 /* Mark toc entries referenced as used. */
8026 repeat = 0;
8027 do
8028 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8029 {
8030 enum elf_ppc64_reloc_type r_type;
8031 unsigned long r_symndx;
8032 asection *sym_sec;
8033 struct elf_link_hash_entry *h;
8034 Elf_Internal_Sym *sym;
8035 bfd_vma val;
8036
8037 r_type = ELF64_R_TYPE (rel->r_info);
8038 switch (r_type)
8039 {
8040 case R_PPC64_TOC16:
8041 case R_PPC64_TOC16_LO:
8042 case R_PPC64_TOC16_HI:
8043 case R_PPC64_TOC16_HA:
8044 case R_PPC64_TOC16_DS:
8045 case R_PPC64_TOC16_LO_DS:
8046 /* In case we're taking addresses of toc entries. */
8047 case R_PPC64_ADDR64:
8048 break;
8049
8050 default:
8051 continue;
8052 }
8053
8054 r_symndx = ELF64_R_SYM (rel->r_info);
8055 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8056 r_symndx, ibfd))
8057 {
8058 free (used);
8059 goto error_ret;
8060 }
8061
8062 if (sym_sec != toc)
8063 continue;
8064
8065 if (h != NULL)
8066 val = h->root.u.def.value;
8067 else
8068 val = sym->st_value;
8069 val += rel->r_addend;
8070
8071 if (val >= toc->size)
8072 continue;
8073
8074 /* For the toc section, we only mark as used if
8075 this entry itself isn't unused. */
8076 if (sec == toc
8077 && !used[val >> 3]
8078 && (used[rel->r_offset >> 3]
8079 || !skip[rel->r_offset >> 3]))
8080 /* Do all the relocs again, to catch reference
8081 chains. */
8082 repeat = 1;
8083
8084 used[val >> 3] = 1;
8085 }
8086 while (repeat);
8087 }
8088
8089 /* Merge the used and skip arrays. Assume that TOC
8090 doublewords not appearing as either used or unused belong
8091 to to an entry more than one doubleword in size. */
8092 for (drop = skip, keep = used, last = 0, some_unused = 0;
8093 drop < skip + (toc->size + 7) / 8;
8094 ++drop, ++keep)
8095 {
8096 if (*keep)
8097 {
8098 *drop = 0;
8099 last = 0;
8100 }
8101 else if (*drop)
8102 {
8103 some_unused = 1;
8104 last = 1;
8105 }
8106 else
8107 *drop = last;
8108 }
8109
8110 free (used);
8111
8112 if (some_unused)
8113 {
8114 bfd_byte *contents, *src;
8115 unsigned long off;
8116
8117 /* Shuffle the toc contents, and at the same time convert the
8118 skip array from booleans into offsets. */
8119 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8120 goto error_ret;
8121
8122 elf_section_data (toc)->this_hdr.contents = contents;
8123
8124 for (src = contents, off = 0, drop = skip;
8125 src < contents + toc->size;
8126 src += 8, ++drop)
8127 {
8128 if (*drop)
8129 {
8130 *drop = (unsigned long) -1;
8131 off += 8;
8132 }
8133 else if (off != 0)
8134 {
8135 *drop = off;
8136 memcpy (src - off, src, 8);
8137 }
8138 }
8139 toc->rawsize = toc->size;
8140 toc->size = src - contents - off;
8141
8142 if (toc->reloc_count != 0)
8143 {
8144 Elf_Internal_Rela *wrel;
8145 bfd_size_type sz;
8146
8147 /* Read toc relocs. */
8148 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8149 TRUE);
8150 if (relstart == NULL)
8151 goto error_ret;
8152
8153 /* Remove unused toc relocs, and adjust those we keep. */
8154 wrel = relstart;
8155 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8156 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8157 {
8158 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8159 wrel->r_info = rel->r_info;
8160 wrel->r_addend = rel->r_addend;
8161 ++wrel;
8162 }
8163 else if (!dec_dynrel_count (rel->r_info, toc, info,
8164 &local_syms, NULL, NULL))
8165 goto error_ret;
8166
8167 toc->reloc_count = wrel - relstart;
8168 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8169 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8170 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8171 }
8172
8173 /* Adjust addends for relocs against the toc section sym. */
8174 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8175 {
8176 if (sec->reloc_count == 0
8177 || elf_discarded_section (sec))
8178 continue;
8179
8180 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8181 TRUE);
8182 if (relstart == NULL)
8183 goto error_ret;
8184
8185 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8186 {
8187 enum elf_ppc64_reloc_type r_type;
8188 unsigned long r_symndx;
8189 asection *sym_sec;
8190 struct elf_link_hash_entry *h;
8191 Elf_Internal_Sym *sym;
8192
8193 r_type = ELF64_R_TYPE (rel->r_info);
8194 switch (r_type)
8195 {
8196 default:
8197 continue;
8198
8199 case R_PPC64_TOC16:
8200 case R_PPC64_TOC16_LO:
8201 case R_PPC64_TOC16_HI:
8202 case R_PPC64_TOC16_HA:
8203 case R_PPC64_TOC16_DS:
8204 case R_PPC64_TOC16_LO_DS:
8205 case R_PPC64_ADDR64:
8206 break;
8207 }
8208
8209 r_symndx = ELF64_R_SYM (rel->r_info);
8210 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8211 r_symndx, ibfd))
8212 goto error_ret;
8213
8214 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8215 continue;
8216
8217 rel->r_addend -= skip[rel->r_addend >> 3];
8218 }
8219 }
8220
8221 /* We shouldn't have local or global symbols defined in the TOC,
8222 but handle them anyway. */
8223 if (local_syms != NULL)
8224 {
8225 Elf_Internal_Sym *sym;
8226
8227 for (sym = local_syms;
8228 sym < local_syms + symtab_hdr->sh_info;
8229 ++sym)
8230 if (sym->st_value != 0
8231 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8232 {
8233 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8234 sym->st_value -= skip[sym->st_value >> 3];
8235 else
8236 {
8237 (*_bfd_error_handler)
8238 (_("%s defined in removed toc entry"),
8239 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8240 NULL));
8241 sym->st_value = 0;
8242 sym->st_shndx = SHN_ABS;
8243 }
8244 symtab_hdr->contents = (unsigned char *) local_syms;
8245 }
8246 }
8247
8248 /* Finally, adjust any global syms defined in the toc. */
8249 if (toc_inf.global_toc_syms)
8250 {
8251 toc_inf.toc = toc;
8252 toc_inf.skip = skip;
8253 toc_inf.global_toc_syms = FALSE;
8254 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8255 &toc_inf);
8256 }
8257 }
8258
8259 if (local_syms != NULL
8260 && symtab_hdr->contents != (unsigned char *) local_syms)
8261 {
8262 if (!info->keep_memory)
8263 free (local_syms);
8264 else
8265 symtab_hdr->contents = (unsigned char *) local_syms;
8266 }
8267 free (skip);
8268 }
8269
8270 return TRUE;
8271 }
8272
8273 /* Allocate space for one GOT entry. */
8274
8275 static void
8276 allocate_got (struct elf_link_hash_entry *h,
8277 struct bfd_link_info *info,
8278 struct got_entry *gent)
8279 {
8280 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8281 bfd_boolean dyn;
8282 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8283 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8284 ? 16 : 8);
8285 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8286 ? 2 : 1) * sizeof (Elf64_External_Rela);
8287 asection *got = ppc64_elf_tdata (gent->owner)->got;
8288
8289 gent->got.offset = got->size;
8290 got->size += entsize;
8291
8292 dyn = htab->elf.dynamic_sections_created;
8293 if ((info->shared
8294 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8295 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8296 || h->root.type != bfd_link_hash_undefweak))
8297 {
8298 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8299 relgot->size += rentsize;
8300 }
8301 else if (h->type == STT_GNU_IFUNC)
8302 {
8303 asection *relgot = htab->reliplt;
8304 relgot->size += rentsize;
8305 htab->got_reli_size += rentsize;
8306 }
8307 }
8308
8309 /* Allocate space in .plt, .got and associated reloc sections for
8310 dynamic relocs. */
8311
8312 static bfd_boolean
8313 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8314 {
8315 struct bfd_link_info *info;
8316 struct ppc_link_hash_table *htab;
8317 asection *s;
8318 struct ppc_link_hash_entry *eh;
8319 struct ppc_dyn_relocs *p;
8320 struct got_entry *gent;
8321
8322 if (h->root.type == bfd_link_hash_indirect)
8323 return TRUE;
8324
8325 if (h->root.type == bfd_link_hash_warning)
8326 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8327
8328 info = (struct bfd_link_info *) inf;
8329 htab = ppc_hash_table (info);
8330 if (htab == NULL)
8331 return FALSE;
8332
8333 if ((htab->elf.dynamic_sections_created
8334 && h->dynindx != -1
8335 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8336 || h->type == STT_GNU_IFUNC)
8337 {
8338 struct plt_entry *pent;
8339 bfd_boolean doneone = FALSE;
8340 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8341 if (pent->plt.refcount > 0)
8342 {
8343 if (!htab->elf.dynamic_sections_created
8344 || h->dynindx == -1)
8345 {
8346 s = htab->iplt;
8347 pent->plt.offset = s->size;
8348 s->size += PLT_ENTRY_SIZE;
8349 s = htab->reliplt;
8350 }
8351 else
8352 {
8353 /* If this is the first .plt entry, make room for the special
8354 first entry. */
8355 s = htab->plt;
8356 if (s->size == 0)
8357 s->size += PLT_INITIAL_ENTRY_SIZE;
8358
8359 pent->plt.offset = s->size;
8360
8361 /* Make room for this entry. */
8362 s->size += PLT_ENTRY_SIZE;
8363
8364 /* Make room for the .glink code. */
8365 s = htab->glink;
8366 if (s->size == 0)
8367 s->size += GLINK_CALL_STUB_SIZE;
8368 /* We need bigger stubs past index 32767. */
8369 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8370 s->size += 4;
8371 s->size += 2*4;
8372
8373 /* We also need to make an entry in the .rela.plt section. */
8374 s = htab->relplt;
8375 }
8376 s->size += sizeof (Elf64_External_Rela);
8377 doneone = TRUE;
8378 }
8379 else
8380 pent->plt.offset = (bfd_vma) -1;
8381 if (!doneone)
8382 {
8383 h->plt.plist = NULL;
8384 h->needs_plt = 0;
8385 }
8386 }
8387 else
8388 {
8389 h->plt.plist = NULL;
8390 h->needs_plt = 0;
8391 }
8392
8393 eh = (struct ppc_link_hash_entry *) h;
8394 /* Run through the TLS GD got entries first if we're changing them
8395 to TPREL. */
8396 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8397 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8398 if (gent->got.refcount > 0
8399 && (gent->tls_type & TLS_GD) != 0)
8400 {
8401 /* This was a GD entry that has been converted to TPREL. If
8402 there happens to be a TPREL entry we can use that one. */
8403 struct got_entry *ent;
8404 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8405 if (ent->got.refcount > 0
8406 && (ent->tls_type & TLS_TPREL) != 0
8407 && ent->addend == gent->addend
8408 && ent->owner == gent->owner)
8409 {
8410 gent->got.refcount = 0;
8411 break;
8412 }
8413
8414 /* If not, then we'll be using our own TPREL entry. */
8415 if (gent->got.refcount != 0)
8416 gent->tls_type = TLS_TLS | TLS_TPREL;
8417 }
8418
8419 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8420 if (gent->got.refcount > 0)
8421 {
8422 /* Make sure this symbol is output as a dynamic symbol.
8423 Undefined weak syms won't yet be marked as dynamic,
8424 nor will all TLS symbols. */
8425 if (h->dynindx == -1
8426 && !h->forced_local
8427 && h->type != STT_GNU_IFUNC
8428 && htab->elf.dynamic_sections_created)
8429 {
8430 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8431 return FALSE;
8432 }
8433
8434 if ((gent->tls_type & TLS_LD) != 0
8435 && !h->def_dynamic)
8436 {
8437 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8438 gent->got.offset = (bfd_vma) -1;
8439 continue;
8440 }
8441
8442 if (!is_ppc64_elf (gent->owner))
8443 abort ();
8444
8445 allocate_got (h, info, gent);
8446 }
8447 else
8448 gent->got.offset = (bfd_vma) -1;
8449
8450 if (eh->dyn_relocs == NULL
8451 || (!htab->elf.dynamic_sections_created
8452 && h->type != STT_GNU_IFUNC))
8453 return TRUE;
8454
8455 /* In the shared -Bsymbolic case, discard space allocated for
8456 dynamic pc-relative relocs against symbols which turn out to be
8457 defined in regular objects. For the normal shared case, discard
8458 space for relocs that have become local due to symbol visibility
8459 changes. */
8460
8461 if (info->shared)
8462 {
8463 /* Relocs that use pc_count are those that appear on a call insn,
8464 or certain REL relocs (see must_be_dyn_reloc) that can be
8465 generated via assembly. We want calls to protected symbols to
8466 resolve directly to the function rather than going via the plt.
8467 If people want function pointer comparisons to work as expected
8468 then they should avoid writing weird assembly. */
8469 if (SYMBOL_CALLS_LOCAL (info, h))
8470 {
8471 struct ppc_dyn_relocs **pp;
8472
8473 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8474 {
8475 p->count -= p->pc_count;
8476 p->pc_count = 0;
8477 if (p->count == 0)
8478 *pp = p->next;
8479 else
8480 pp = &p->next;
8481 }
8482 }
8483
8484 /* Also discard relocs on undefined weak syms with non-default
8485 visibility. */
8486 if (eh->dyn_relocs != NULL
8487 && h->root.type == bfd_link_hash_undefweak)
8488 {
8489 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8490 eh->dyn_relocs = NULL;
8491
8492 /* Make sure this symbol is output as a dynamic symbol.
8493 Undefined weak syms won't yet be marked as dynamic. */
8494 else if (h->dynindx == -1
8495 && !h->forced_local)
8496 {
8497 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8498 return FALSE;
8499 }
8500 }
8501 }
8502 else if (h->type == STT_GNU_IFUNC)
8503 {
8504 if (!h->non_got_ref)
8505 eh->dyn_relocs = NULL;
8506 }
8507 else if (ELIMINATE_COPY_RELOCS)
8508 {
8509 /* For the non-shared case, discard space for relocs against
8510 symbols which turn out to need copy relocs or are not
8511 dynamic. */
8512
8513 if (!h->non_got_ref
8514 && !h->def_regular)
8515 {
8516 /* Make sure this symbol is output as a dynamic symbol.
8517 Undefined weak syms won't yet be marked as dynamic. */
8518 if (h->dynindx == -1
8519 && !h->forced_local)
8520 {
8521 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8522 return FALSE;
8523 }
8524
8525 /* If that succeeded, we know we'll be keeping all the
8526 relocs. */
8527 if (h->dynindx != -1)
8528 goto keep;
8529 }
8530
8531 eh->dyn_relocs = NULL;
8532
8533 keep: ;
8534 }
8535
8536 /* Finally, allocate space. */
8537 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8538 {
8539 asection *sreloc = elf_section_data (p->sec)->sreloc;
8540 if (!htab->elf.dynamic_sections_created)
8541 sreloc = htab->reliplt;
8542 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8543 }
8544
8545 return TRUE;
8546 }
8547
8548 /* Find any dynamic relocs that apply to read-only sections. */
8549
8550 static bfd_boolean
8551 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8552 {
8553 struct ppc_link_hash_entry *eh;
8554 struct ppc_dyn_relocs *p;
8555
8556 if (h->root.type == bfd_link_hash_warning)
8557 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8558
8559 eh = (struct ppc_link_hash_entry *) h;
8560 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8561 {
8562 asection *s = p->sec->output_section;
8563
8564 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8565 {
8566 struct bfd_link_info *info = inf;
8567
8568 info->flags |= DF_TEXTREL;
8569
8570 /* Not an error, just cut short the traversal. */
8571 return FALSE;
8572 }
8573 }
8574 return TRUE;
8575 }
8576
8577 /* Set the sizes of the dynamic sections. */
8578
8579 static bfd_boolean
8580 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8581 struct bfd_link_info *info)
8582 {
8583 struct ppc_link_hash_table *htab;
8584 bfd *dynobj;
8585 asection *s;
8586 bfd_boolean relocs;
8587 bfd *ibfd;
8588
8589 htab = ppc_hash_table (info);
8590 if (htab == NULL)
8591 return FALSE;
8592
8593 dynobj = htab->elf.dynobj;
8594 if (dynobj == NULL)
8595 abort ();
8596
8597 if (htab->elf.dynamic_sections_created)
8598 {
8599 /* Set the contents of the .interp section to the interpreter. */
8600 if (info->executable)
8601 {
8602 s = bfd_get_section_by_name (dynobj, ".interp");
8603 if (s == NULL)
8604 abort ();
8605 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8606 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8607 }
8608 }
8609
8610 /* Set up .got offsets for local syms, and space for local dynamic
8611 relocs. */
8612 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8613 {
8614 struct got_entry **lgot_ents;
8615 struct got_entry **end_lgot_ents;
8616 struct plt_entry **local_plt;
8617 struct plt_entry **end_local_plt;
8618 char *lgot_masks;
8619 bfd_size_type locsymcount;
8620 Elf_Internal_Shdr *symtab_hdr;
8621 asection *srel;
8622
8623 if (!is_ppc64_elf (ibfd))
8624 continue;
8625
8626 for (s = ibfd->sections; s != NULL; s = s->next)
8627 {
8628 struct ppc_dyn_relocs *p;
8629
8630 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8631 {
8632 if (!bfd_is_abs_section (p->sec)
8633 && bfd_is_abs_section (p->sec->output_section))
8634 {
8635 /* Input section has been discarded, either because
8636 it is a copy of a linkonce section or due to
8637 linker script /DISCARD/, so we'll be discarding
8638 the relocs too. */
8639 }
8640 else if (p->count != 0)
8641 {
8642 srel = elf_section_data (p->sec)->sreloc;
8643 if (!htab->elf.dynamic_sections_created)
8644 srel = htab->reliplt;
8645 srel->size += p->count * sizeof (Elf64_External_Rela);
8646 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8647 info->flags |= DF_TEXTREL;
8648 }
8649 }
8650 }
8651
8652 lgot_ents = elf_local_got_ents (ibfd);
8653 if (!lgot_ents)
8654 continue;
8655
8656 symtab_hdr = &elf_symtab_hdr (ibfd);
8657 locsymcount = symtab_hdr->sh_info;
8658 end_lgot_ents = lgot_ents + locsymcount;
8659 local_plt = (struct plt_entry **) end_lgot_ents;
8660 end_local_plt = local_plt + locsymcount;
8661 lgot_masks = (char *) end_local_plt;
8662 s = ppc64_elf_tdata (ibfd)->got;
8663 srel = ppc64_elf_tdata (ibfd)->relgot;
8664 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8665 {
8666 struct got_entry *ent;
8667
8668 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8669 if (ent->got.refcount > 0)
8670 {
8671 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8672 {
8673 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8674 ent->got.offset = (bfd_vma) -1;
8675 }
8676 else
8677 {
8678 unsigned int num = 1;
8679 ent->got.offset = s->size;
8680 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8681 num = 2;
8682 s->size += num * 8;
8683 if (info->shared)
8684 srel->size += num * sizeof (Elf64_External_Rela);
8685 else if ((*lgot_masks & PLT_IFUNC) != 0)
8686 {
8687 htab->reliplt->size
8688 += num * sizeof (Elf64_External_Rela);
8689 htab->got_reli_size
8690 += num * sizeof (Elf64_External_Rela);
8691 }
8692 }
8693 }
8694 else
8695 ent->got.offset = (bfd_vma) -1;
8696 }
8697
8698 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8699 for (; local_plt < end_local_plt; ++local_plt)
8700 {
8701 struct plt_entry *ent;
8702
8703 for (ent = *local_plt; ent != NULL; ent = ent->next)
8704 if (ent->plt.refcount > 0)
8705 {
8706 s = htab->iplt;
8707 ent->plt.offset = s->size;
8708 s->size += PLT_ENTRY_SIZE;
8709
8710 htab->reliplt->size += sizeof (Elf64_External_Rela);
8711 }
8712 else
8713 ent->plt.offset = (bfd_vma) -1;
8714 }
8715 }
8716
8717 /* Allocate global sym .plt and .got entries, and space for global
8718 sym dynamic relocs. */
8719 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8720
8721 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8722 {
8723 if (!is_ppc64_elf (ibfd))
8724 continue;
8725
8726 if (ppc64_tlsld_got (ibfd)->got.refcount > 0)
8727 {
8728 s = ppc64_elf_tdata (ibfd)->got;
8729 ppc64_tlsld_got (ibfd)->got.offset = s->size;
8730 ppc64_tlsld_got (ibfd)->owner = ibfd;
8731 s->size += 16;
8732 if (info->shared)
8733 {
8734 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8735 srel->size += sizeof (Elf64_External_Rela);
8736 }
8737 }
8738 else
8739 ppc64_tlsld_got (ibfd)->got.offset = (bfd_vma) -1;
8740 }
8741
8742 /* We now have determined the sizes of the various dynamic sections.
8743 Allocate memory for them. */
8744 relocs = FALSE;
8745 for (s = dynobj->sections; s != NULL; s = s->next)
8746 {
8747 if ((s->flags & SEC_LINKER_CREATED) == 0)
8748 continue;
8749
8750 if (s == htab->brlt || s == htab->relbrlt)
8751 /* These haven't been allocated yet; don't strip. */
8752 continue;
8753 else if (s == htab->got
8754 || s == htab->plt
8755 || s == htab->iplt
8756 || s == htab->glink
8757 || s == htab->dynbss)
8758 {
8759 /* Strip this section if we don't need it; see the
8760 comment below. */
8761 }
8762 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8763 {
8764 if (s->size != 0)
8765 {
8766 if (s != htab->relplt)
8767 relocs = TRUE;
8768
8769 /* We use the reloc_count field as a counter if we need
8770 to copy relocs into the output file. */
8771 s->reloc_count = 0;
8772 }
8773 }
8774 else
8775 {
8776 /* It's not one of our sections, so don't allocate space. */
8777 continue;
8778 }
8779
8780 if (s->size == 0)
8781 {
8782 /* If we don't need this section, strip it from the
8783 output file. This is mostly to handle .rela.bss and
8784 .rela.plt. We must create both sections in
8785 create_dynamic_sections, because they must be created
8786 before the linker maps input sections to output
8787 sections. The linker does that before
8788 adjust_dynamic_symbol is called, and it is that
8789 function which decides whether anything needs to go
8790 into these sections. */
8791 s->flags |= SEC_EXCLUDE;
8792 continue;
8793 }
8794
8795 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8796 continue;
8797
8798 /* Allocate memory for the section contents. We use bfd_zalloc
8799 here in case unused entries are not reclaimed before the
8800 section's contents are written out. This should not happen,
8801 but this way if it does we get a R_PPC64_NONE reloc in .rela
8802 sections instead of garbage.
8803 We also rely on the section contents being zero when writing
8804 the GOT. */
8805 s->contents = bfd_zalloc (dynobj, s->size);
8806 if (s->contents == NULL)
8807 return FALSE;
8808 }
8809
8810 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8811 {
8812 if (!is_ppc64_elf (ibfd))
8813 continue;
8814
8815 s = ppc64_elf_tdata (ibfd)->got;
8816 if (s != NULL && s != htab->got)
8817 {
8818 if (s->size == 0)
8819 s->flags |= SEC_EXCLUDE;
8820 else
8821 {
8822 s->contents = bfd_zalloc (ibfd, s->size);
8823 if (s->contents == NULL)
8824 return FALSE;
8825 }
8826 }
8827 s = ppc64_elf_tdata (ibfd)->relgot;
8828 if (s != NULL)
8829 {
8830 if (s->size == 0)
8831 s->flags |= SEC_EXCLUDE;
8832 else
8833 {
8834 s->contents = bfd_zalloc (ibfd, s->size);
8835 if (s->contents == NULL)
8836 return FALSE;
8837 relocs = TRUE;
8838 s->reloc_count = 0;
8839 }
8840 }
8841 }
8842
8843 if (htab->elf.dynamic_sections_created)
8844 {
8845 /* Add some entries to the .dynamic section. We fill in the
8846 values later, in ppc64_elf_finish_dynamic_sections, but we
8847 must add the entries now so that we get the correct size for
8848 the .dynamic section. The DT_DEBUG entry is filled in by the
8849 dynamic linker and used by the debugger. */
8850 #define add_dynamic_entry(TAG, VAL) \
8851 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8852
8853 if (info->executable)
8854 {
8855 if (!add_dynamic_entry (DT_DEBUG, 0))
8856 return FALSE;
8857 }
8858
8859 if (htab->plt != NULL && htab->plt->size != 0)
8860 {
8861 if (!add_dynamic_entry (DT_PLTGOT, 0)
8862 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8863 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8864 || !add_dynamic_entry (DT_JMPREL, 0)
8865 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8866 return FALSE;
8867 }
8868
8869 if (NO_OPD_RELOCS)
8870 {
8871 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8872 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8873 return FALSE;
8874 }
8875
8876 if (!htab->no_tls_get_addr_opt
8877 && htab->tls_get_addr_fd != NULL
8878 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8879 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8880 return FALSE;
8881
8882 if (relocs)
8883 {
8884 if (!add_dynamic_entry (DT_RELA, 0)
8885 || !add_dynamic_entry (DT_RELASZ, 0)
8886 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8887 return FALSE;
8888
8889 /* If any dynamic relocs apply to a read-only section,
8890 then we need a DT_TEXTREL entry. */
8891 if ((info->flags & DF_TEXTREL) == 0)
8892 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8893
8894 if ((info->flags & DF_TEXTREL) != 0)
8895 {
8896 if (!add_dynamic_entry (DT_TEXTREL, 0))
8897 return FALSE;
8898 }
8899 }
8900 }
8901 #undef add_dynamic_entry
8902
8903 return TRUE;
8904 }
8905
8906 /* Determine the type of stub needed, if any, for a call. */
8907
8908 static inline enum ppc_stub_type
8909 ppc_type_of_stub (asection *input_sec,
8910 const Elf_Internal_Rela *rel,
8911 struct ppc_link_hash_entry **hash,
8912 struct plt_entry **plt_ent,
8913 bfd_vma destination)
8914 {
8915 struct ppc_link_hash_entry *h = *hash;
8916 bfd_vma location;
8917 bfd_vma branch_offset;
8918 bfd_vma max_branch_offset;
8919 enum elf_ppc64_reloc_type r_type;
8920
8921 if (h != NULL)
8922 {
8923 struct plt_entry *ent;
8924 struct ppc_link_hash_entry *fdh = h;
8925 if (h->oh != NULL
8926 && h->oh->is_func_descriptor)
8927 fdh = ppc_follow_link (h->oh);
8928
8929 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8930 if (ent->addend == rel->r_addend
8931 && ent->plt.offset != (bfd_vma) -1)
8932 {
8933 *hash = fdh;
8934 *plt_ent = ent;
8935 return ppc_stub_plt_call;
8936 }
8937
8938 /* Here, we know we don't have a plt entry. If we don't have a
8939 either a defined function descriptor or a defined entry symbol
8940 in a regular object file, then it is pointless trying to make
8941 any other type of stub. */
8942 if (!((fdh->elf.root.type == bfd_link_hash_defined
8943 || fdh->elf.root.type == bfd_link_hash_defweak)
8944 && fdh->elf.root.u.def.section->output_section != NULL)
8945 && !((h->elf.root.type == bfd_link_hash_defined
8946 || h->elf.root.type == bfd_link_hash_defweak)
8947 && h->elf.root.u.def.section->output_section != NULL))
8948 return ppc_stub_none;
8949 }
8950 else if (elf_local_got_ents (input_sec->owner) != NULL)
8951 {
8952 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
8953 struct plt_entry **local_plt = (struct plt_entry **)
8954 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
8955 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
8956
8957 if (local_plt[r_symndx] != NULL)
8958 {
8959 struct plt_entry *ent;
8960
8961 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
8962 if (ent->addend == rel->r_addend
8963 && ent->plt.offset != (bfd_vma) -1)
8964 {
8965 *plt_ent = ent;
8966 return ppc_stub_plt_call;
8967 }
8968 }
8969 }
8970
8971 /* Determine where the call point is. */
8972 location = (input_sec->output_offset
8973 + input_sec->output_section->vma
8974 + rel->r_offset);
8975
8976 branch_offset = destination - location;
8977 r_type = ELF64_R_TYPE (rel->r_info);
8978
8979 /* Determine if a long branch stub is needed. */
8980 max_branch_offset = 1 << 25;
8981 if (r_type != R_PPC64_REL24)
8982 max_branch_offset = 1 << 15;
8983
8984 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8985 /* We need a stub. Figure out whether a long_branch or plt_branch
8986 is needed later. */
8987 return ppc_stub_long_branch;
8988
8989 return ppc_stub_none;
8990 }
8991
8992 /* Build a .plt call stub. */
8993
8994 static inline bfd_byte *
8995 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8996 {
8997 #define PPC_LO(v) ((v) & 0xffff)
8998 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8999 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9000
9001 if (PPC_HA (offset) != 0)
9002 {
9003 if (r != NULL)
9004 {
9005 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9006 r[1].r_offset = r[0].r_offset + 8;
9007 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9008 r[1].r_addend = r[0].r_addend;
9009 if (PPC_HA (offset + 16) != PPC_HA (offset))
9010 {
9011 r[2].r_offset = r[1].r_offset + 4;
9012 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9013 r[2].r_addend = r[0].r_addend;
9014 }
9015 else
9016 {
9017 r[2].r_offset = r[1].r_offset + 8;
9018 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9019 r[2].r_addend = r[0].r_addend + 8;
9020 r[3].r_offset = r[2].r_offset + 4;
9021 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9022 r[3].r_addend = r[0].r_addend + 16;
9023 }
9024 }
9025 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9026 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9027 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9028 if (PPC_HA (offset + 16) != PPC_HA (offset))
9029 {
9030 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9031 offset = 0;
9032 }
9033 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9034 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9035 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9036 bfd_put_32 (obfd, BCTR, p), p += 4;
9037 }
9038 else
9039 {
9040 if (r != NULL)
9041 {
9042 r[0].r_offset += 4;
9043 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9044 if (PPC_HA (offset + 16) != PPC_HA (offset))
9045 {
9046 r[1].r_offset = r[0].r_offset + 4;
9047 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9048 r[1].r_addend = r[0].r_addend;
9049 }
9050 else
9051 {
9052 r[1].r_offset = r[0].r_offset + 8;
9053 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9054 r[1].r_addend = r[0].r_addend + 16;
9055 r[2].r_offset = r[1].r_offset + 4;
9056 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9057 r[2].r_addend = r[0].r_addend + 8;
9058 }
9059 }
9060 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9061 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9062 if (PPC_HA (offset + 16) != PPC_HA (offset))
9063 {
9064 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9065 offset = 0;
9066 }
9067 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9068 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9069 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9070 bfd_put_32 (obfd, BCTR, p), p += 4;
9071 }
9072 return p;
9073 }
9074
9075 /* Build a special .plt call stub for __tls_get_addr. */
9076
9077 #define LD_R11_0R3 0xe9630000
9078 #define LD_R12_0R3 0xe9830000
9079 #define MR_R0_R3 0x7c601b78
9080 #define CMPDI_R11_0 0x2c2b0000
9081 #define ADD_R3_R12_R13 0x7c6c6a14
9082 #define BEQLR 0x4d820020
9083 #define MR_R3_R0 0x7c030378
9084 #define MFLR_R11 0x7d6802a6
9085 #define STD_R11_0R1 0xf9610000
9086 #define BCTRL 0x4e800421
9087 #define LD_R11_0R1 0xe9610000
9088 #define LD_R2_0R1 0xe8410000
9089 #define MTLR_R11 0x7d6803a6
9090
9091 static inline bfd_byte *
9092 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9093 Elf_Internal_Rela *r)
9094 {
9095 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9096 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9097 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9098 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9099 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9100 bfd_put_32 (obfd, BEQLR, p), p += 4;
9101 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9102 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9103 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9104
9105 if (r != NULL)
9106 r[0].r_offset += 9 * 4;
9107 p = build_plt_stub (obfd, p, offset, r);
9108 bfd_put_32 (obfd, BCTRL, p - 4);
9109
9110 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9111 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9112 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9113 bfd_put_32 (obfd, BLR, p), p += 4;
9114
9115 return p;
9116 }
9117
9118 static Elf_Internal_Rela *
9119 get_relocs (asection *sec, int count)
9120 {
9121 Elf_Internal_Rela *relocs;
9122 struct bfd_elf_section_data *elfsec_data;
9123
9124 elfsec_data = elf_section_data (sec);
9125 relocs = elfsec_data->relocs;
9126 if (relocs == NULL)
9127 {
9128 bfd_size_type relsize;
9129 relsize = sec->reloc_count * sizeof (*relocs);
9130 relocs = bfd_alloc (sec->owner, relsize);
9131 if (relocs == NULL)
9132 return NULL;
9133 elfsec_data->relocs = relocs;
9134 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9135 * sizeof (Elf64_External_Rela));
9136 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9137 sec->reloc_count = 0;
9138 }
9139 relocs += sec->reloc_count;
9140 sec->reloc_count += count;
9141 return relocs;
9142 }
9143
9144 static bfd_boolean
9145 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9146 {
9147 struct ppc_stub_hash_entry *stub_entry;
9148 struct ppc_branch_hash_entry *br_entry;
9149 struct bfd_link_info *info;
9150 struct ppc_link_hash_table *htab;
9151 bfd_byte *loc;
9152 bfd_byte *p;
9153 bfd_vma dest, off;
9154 int size;
9155 Elf_Internal_Rela *r;
9156 asection *plt;
9157
9158 /* Massage our args to the form they really have. */
9159 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9160 info = in_arg;
9161
9162 htab = ppc_hash_table (info);
9163 if (htab == NULL)
9164 return FALSE;
9165
9166 /* Make a note of the offset within the stubs for this entry. */
9167 stub_entry->stub_offset = stub_entry->stub_sec->size;
9168 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9169
9170 htab->stub_count[stub_entry->stub_type - 1] += 1;
9171 switch (stub_entry->stub_type)
9172 {
9173 case ppc_stub_long_branch:
9174 case ppc_stub_long_branch_r2off:
9175 /* Branches are relative. This is where we are going to. */
9176 off = dest = (stub_entry->target_value
9177 + stub_entry->target_section->output_offset
9178 + stub_entry->target_section->output_section->vma);
9179
9180 /* And this is where we are coming from. */
9181 off -= (stub_entry->stub_offset
9182 + stub_entry->stub_sec->output_offset
9183 + stub_entry->stub_sec->output_section->vma);
9184
9185 size = 4;
9186 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9187 {
9188 bfd_vma r2off;
9189
9190 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9191 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9192 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9193 loc += 4;
9194 size = 12;
9195 if (PPC_HA (r2off) != 0)
9196 {
9197 size = 16;
9198 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9199 loc += 4;
9200 }
9201 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9202 loc += 4;
9203 off -= size - 4;
9204 }
9205 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9206
9207 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9208 {
9209 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9210 stub_entry->root.string);
9211 htab->stub_error = TRUE;
9212 return FALSE;
9213 }
9214
9215 if (info->emitrelocations)
9216 {
9217 r = get_relocs (stub_entry->stub_sec, 1);
9218 if (r == NULL)
9219 return FALSE;
9220 r->r_offset = loc - stub_entry->stub_sec->contents;
9221 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9222 r->r_addend = dest;
9223 if (stub_entry->h != NULL)
9224 {
9225 struct elf_link_hash_entry **hashes;
9226 unsigned long symndx;
9227 struct ppc_link_hash_entry *h;
9228
9229 hashes = elf_sym_hashes (htab->stub_bfd);
9230 if (hashes == NULL)
9231 {
9232 bfd_size_type hsize;
9233
9234 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9235 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9236 if (hashes == NULL)
9237 return FALSE;
9238 elf_sym_hashes (htab->stub_bfd) = hashes;
9239 htab->stub_globals = 1;
9240 }
9241 symndx = htab->stub_globals++;
9242 h = stub_entry->h;
9243 hashes[symndx] = &h->elf;
9244 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9245 if (h->oh != NULL && h->oh->is_func)
9246 h = ppc_follow_link (h->oh);
9247 if (h->elf.root.u.def.section != stub_entry->target_section)
9248 /* H is an opd symbol. The addend must be zero. */
9249 r->r_addend = 0;
9250 else
9251 {
9252 off = (h->elf.root.u.def.value
9253 + h->elf.root.u.def.section->output_offset
9254 + h->elf.root.u.def.section->output_section->vma);
9255 r->r_addend -= off;
9256 }
9257 }
9258 }
9259 break;
9260
9261 case ppc_stub_plt_branch:
9262 case ppc_stub_plt_branch_r2off:
9263 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9264 stub_entry->root.string + 9,
9265 FALSE, FALSE);
9266 if (br_entry == NULL)
9267 {
9268 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9269 stub_entry->root.string);
9270 htab->stub_error = TRUE;
9271 return FALSE;
9272 }
9273
9274 dest = (stub_entry->target_value
9275 + stub_entry->target_section->output_offset
9276 + stub_entry->target_section->output_section->vma);
9277
9278 bfd_put_64 (htab->brlt->owner, dest,
9279 htab->brlt->contents + br_entry->offset);
9280
9281 if (br_entry->iter == htab->stub_iteration)
9282 {
9283 br_entry->iter = 0;
9284
9285 if (htab->relbrlt != NULL)
9286 {
9287 /* Create a reloc for the branch lookup table entry. */
9288 Elf_Internal_Rela rela;
9289 bfd_byte *rl;
9290
9291 rela.r_offset = (br_entry->offset
9292 + htab->brlt->output_offset
9293 + htab->brlt->output_section->vma);
9294 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9295 rela.r_addend = dest;
9296
9297 rl = htab->relbrlt->contents;
9298 rl += (htab->relbrlt->reloc_count++
9299 * sizeof (Elf64_External_Rela));
9300 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9301 }
9302 else if (info->emitrelocations)
9303 {
9304 r = get_relocs (htab->brlt, 1);
9305 if (r == NULL)
9306 return FALSE;
9307 /* brlt, being SEC_LINKER_CREATED does not go through the
9308 normal reloc processing. Symbols and offsets are not
9309 translated from input file to output file form, so
9310 set up the offset per the output file. */
9311 r->r_offset = (br_entry->offset
9312 + htab->brlt->output_offset
9313 + htab->brlt->output_section->vma);
9314 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9315 r->r_addend = dest;
9316 }
9317 }
9318
9319 dest = (br_entry->offset
9320 + htab->brlt->output_offset
9321 + htab->brlt->output_section->vma);
9322
9323 off = (dest
9324 - elf_gp (htab->brlt->output_section->owner)
9325 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9326
9327 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9328 {
9329 (*_bfd_error_handler)
9330 (_("linkage table error against `%s'"),
9331 stub_entry->root.string);
9332 bfd_set_error (bfd_error_bad_value);
9333 htab->stub_error = TRUE;
9334 return FALSE;
9335 }
9336
9337 if (info->emitrelocations)
9338 {
9339 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9340 if (r == NULL)
9341 return FALSE;
9342 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9343 if (bfd_big_endian (info->output_bfd))
9344 r[0].r_offset += 2;
9345 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9346 r[0].r_offset += 4;
9347 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9348 r[0].r_addend = dest;
9349 if (PPC_HA (off) != 0)
9350 {
9351 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9352 r[1].r_offset = r[0].r_offset + 4;
9353 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9354 r[1].r_addend = r[0].r_addend;
9355 }
9356 }
9357
9358 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9359 {
9360 if (PPC_HA (off) != 0)
9361 {
9362 size = 16;
9363 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9364 loc += 4;
9365 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9366 }
9367 else
9368 {
9369 size = 12;
9370 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9371 }
9372 }
9373 else
9374 {
9375 bfd_vma r2off;
9376
9377 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9378 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9379 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9380 loc += 4;
9381 size = 20;
9382 if (PPC_HA (off) != 0)
9383 {
9384 size += 4;
9385 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9386 loc += 4;
9387 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9388 loc += 4;
9389 }
9390 else
9391 {
9392 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9393 loc += 4;
9394 }
9395
9396 if (PPC_HA (r2off) != 0)
9397 {
9398 size += 4;
9399 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9400 loc += 4;
9401 }
9402 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9403 }
9404 loc += 4;
9405 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9406 loc += 4;
9407 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9408 break;
9409
9410 case ppc_stub_plt_call:
9411 if (stub_entry->h != NULL
9412 && stub_entry->h->is_func_descriptor
9413 && stub_entry->h->oh != NULL)
9414 {
9415 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9416
9417 /* If the old-ABI "dot-symbol" is undefined make it weak so
9418 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9419 FIXME: We used to define the symbol on one of the call
9420 stubs instead, which is why we test symbol section id
9421 against htab->top_id in various places. Likely all
9422 these checks could now disappear. */
9423 if (fh->elf.root.type == bfd_link_hash_undefined)
9424 fh->elf.root.type = bfd_link_hash_undefweak;
9425 }
9426
9427 /* Now build the stub. */
9428 dest = stub_entry->plt_ent->plt.offset & ~1;
9429 if (dest >= (bfd_vma) -2)
9430 abort ();
9431
9432 plt = htab->plt;
9433 if (!htab->elf.dynamic_sections_created
9434 || stub_entry->h == NULL
9435 || stub_entry->h->elf.dynindx == -1)
9436 plt = htab->iplt;
9437
9438 dest += plt->output_offset + plt->output_section->vma;
9439
9440 if (stub_entry->h == NULL
9441 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9442 {
9443 Elf_Internal_Rela rela;
9444 bfd_byte *rl;
9445
9446 rela.r_offset = dest;
9447 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9448 rela.r_addend = (stub_entry->target_value
9449 + stub_entry->target_section->output_offset
9450 + stub_entry->target_section->output_section->vma);
9451
9452 rl = (htab->reliplt->contents
9453 + (htab->reliplt->reloc_count++
9454 * sizeof (Elf64_External_Rela)));
9455 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9456 stub_entry->plt_ent->plt.offset |= 1;
9457 }
9458
9459 off = (dest
9460 - elf_gp (plt->output_section->owner)
9461 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9462
9463 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9464 {
9465 (*_bfd_error_handler)
9466 (_("linkage table error against `%s'"),
9467 stub_entry->h != NULL
9468 ? stub_entry->h->elf.root.root.string
9469 : "<local sym>");
9470 bfd_set_error (bfd_error_bad_value);
9471 htab->stub_error = TRUE;
9472 return FALSE;
9473 }
9474
9475 r = NULL;
9476 if (info->emitrelocations)
9477 {
9478 r = get_relocs (stub_entry->stub_sec,
9479 (2 + (PPC_HA (off) != 0)
9480 + (PPC_HA (off + 16) == PPC_HA (off))));
9481 if (r == NULL)
9482 return FALSE;
9483 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9484 if (bfd_big_endian (info->output_bfd))
9485 r[0].r_offset += 2;
9486 r[0].r_addend = dest;
9487 }
9488 if (stub_entry->h != NULL
9489 && (stub_entry->h == htab->tls_get_addr_fd
9490 || stub_entry->h == htab->tls_get_addr)
9491 && !htab->no_tls_get_addr_opt)
9492 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9493 else
9494 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9495 size = p - loc;
9496 break;
9497
9498 default:
9499 BFD_FAIL ();
9500 return FALSE;
9501 }
9502
9503 stub_entry->stub_sec->size += size;
9504
9505 if (htab->emit_stub_syms)
9506 {
9507 struct elf_link_hash_entry *h;
9508 size_t len1, len2;
9509 char *name;
9510 const char *const stub_str[] = { "long_branch",
9511 "long_branch_r2off",
9512 "plt_branch",
9513 "plt_branch_r2off",
9514 "plt_call" };
9515
9516 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9517 len2 = strlen (stub_entry->root.string);
9518 name = bfd_malloc (len1 + len2 + 2);
9519 if (name == NULL)
9520 return FALSE;
9521 memcpy (name, stub_entry->root.string, 9);
9522 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9523 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9524 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9525 if (h == NULL)
9526 return FALSE;
9527 if (h->root.type == bfd_link_hash_new)
9528 {
9529 h->root.type = bfd_link_hash_defined;
9530 h->root.u.def.section = stub_entry->stub_sec;
9531 h->root.u.def.value = stub_entry->stub_offset;
9532 h->ref_regular = 1;
9533 h->def_regular = 1;
9534 h->ref_regular_nonweak = 1;
9535 h->forced_local = 1;
9536 h->non_elf = 0;
9537 }
9538 }
9539
9540 return TRUE;
9541 }
9542
9543 /* As above, but don't actually build the stub. Just bump offset so
9544 we know stub section sizes, and select plt_branch stubs where
9545 long_branch stubs won't do. */
9546
9547 static bfd_boolean
9548 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9549 {
9550 struct ppc_stub_hash_entry *stub_entry;
9551 struct bfd_link_info *info;
9552 struct ppc_link_hash_table *htab;
9553 bfd_vma off;
9554 int size;
9555
9556 /* Massage our args to the form they really have. */
9557 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9558 info = in_arg;
9559
9560 htab = ppc_hash_table (info);
9561 if (htab == NULL)
9562 return FALSE;
9563
9564 if (stub_entry->stub_type == ppc_stub_plt_call)
9565 {
9566 asection *plt;
9567 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9568 if (off >= (bfd_vma) -2)
9569 abort ();
9570 plt = htab->plt;
9571 if (!htab->elf.dynamic_sections_created
9572 || stub_entry->h == NULL
9573 || stub_entry->h->elf.dynindx == -1)
9574 plt = htab->iplt;
9575 off += (plt->output_offset
9576 + plt->output_section->vma
9577 - elf_gp (plt->output_section->owner)
9578 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9579
9580 size = PLT_CALL_STUB_SIZE;
9581 if (PPC_HA (off) == 0)
9582 size -= 4;
9583 if (PPC_HA (off + 16) != PPC_HA (off))
9584 size += 4;
9585 if (stub_entry->h != NULL
9586 && (stub_entry->h == htab->tls_get_addr_fd
9587 || stub_entry->h == htab->tls_get_addr)
9588 && !htab->no_tls_get_addr_opt)
9589 size += 13 * 4;
9590 if (info->emitrelocations)
9591 {
9592 stub_entry->stub_sec->reloc_count
9593 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9594 stub_entry->stub_sec->flags |= SEC_RELOC;
9595 }
9596 }
9597 else
9598 {
9599 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9600 variants. */
9601 bfd_vma r2off = 0;
9602
9603 off = (stub_entry->target_value
9604 + stub_entry->target_section->output_offset
9605 + stub_entry->target_section->output_section->vma);
9606 off -= (stub_entry->stub_sec->size
9607 + stub_entry->stub_sec->output_offset
9608 + stub_entry->stub_sec->output_section->vma);
9609
9610 /* Reset the stub type from the plt variant in case we now
9611 can reach with a shorter stub. */
9612 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9613 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9614
9615 size = 4;
9616 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9617 {
9618 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9619 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9620 size = 12;
9621 if (PPC_HA (r2off) != 0)
9622 size = 16;
9623 off -= size - 4;
9624 }
9625
9626 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9627 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9628 {
9629 struct ppc_branch_hash_entry *br_entry;
9630
9631 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9632 stub_entry->root.string + 9,
9633 TRUE, FALSE);
9634 if (br_entry == NULL)
9635 {
9636 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9637 stub_entry->root.string);
9638 htab->stub_error = TRUE;
9639 return FALSE;
9640 }
9641
9642 if (br_entry->iter != htab->stub_iteration)
9643 {
9644 br_entry->iter = htab->stub_iteration;
9645 br_entry->offset = htab->brlt->size;
9646 htab->brlt->size += 8;
9647
9648 if (htab->relbrlt != NULL)
9649 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9650 else if (info->emitrelocations)
9651 {
9652 htab->brlt->reloc_count += 1;
9653 htab->brlt->flags |= SEC_RELOC;
9654 }
9655 }
9656
9657 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9658 off = (br_entry->offset
9659 + htab->brlt->output_offset
9660 + htab->brlt->output_section->vma
9661 - elf_gp (htab->brlt->output_section->owner)
9662 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9663
9664 if (info->emitrelocations)
9665 {
9666 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9667 stub_entry->stub_sec->flags |= SEC_RELOC;
9668 }
9669
9670 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9671 {
9672 size = 12;
9673 if (PPC_HA (off) != 0)
9674 size = 16;
9675 }
9676 else
9677 {
9678 size = 20;
9679 if (PPC_HA (off) != 0)
9680 size += 4;
9681
9682 if (PPC_HA (r2off) != 0)
9683 size += 4;
9684 }
9685 }
9686 else if (info->emitrelocations)
9687 {
9688 stub_entry->stub_sec->reloc_count += 1;
9689 stub_entry->stub_sec->flags |= SEC_RELOC;
9690 }
9691 }
9692
9693 stub_entry->stub_sec->size += size;
9694 return TRUE;
9695 }
9696
9697 /* Set up various things so that we can make a list of input sections
9698 for each output section included in the link. Returns -1 on error,
9699 0 when no stubs will be needed, and 1 on success. */
9700
9701 int
9702 ppc64_elf_setup_section_lists
9703 (struct bfd_link_info *info,
9704 asection *(*add_stub_section) (const char *, asection *),
9705 void (*layout_sections_again) (void))
9706 {
9707 bfd *input_bfd;
9708 int top_id, top_index, id;
9709 asection *section;
9710 asection **input_list;
9711 bfd_size_type amt;
9712 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9713
9714 if (htab == NULL)
9715 return -1;
9716 /* Stash our params away. */
9717 htab->add_stub_section = add_stub_section;
9718 htab->layout_sections_again = layout_sections_again;
9719
9720 if (htab->brlt == NULL)
9721 return 0;
9722
9723 /* Find the top input section id. */
9724 for (input_bfd = info->input_bfds, top_id = 3;
9725 input_bfd != NULL;
9726 input_bfd = input_bfd->link_next)
9727 {
9728 for (section = input_bfd->sections;
9729 section != NULL;
9730 section = section->next)
9731 {
9732 if (top_id < section->id)
9733 top_id = section->id;
9734 }
9735 }
9736
9737 htab->top_id = top_id;
9738 amt = sizeof (struct map_stub) * (top_id + 1);
9739 htab->stub_group = bfd_zmalloc (amt);
9740 if (htab->stub_group == NULL)
9741 return -1;
9742
9743 /* Set toc_off for com, und, abs and ind sections. */
9744 for (id = 0; id < 3; id++)
9745 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9746
9747 /* We can't use output_bfd->section_count here to find the top output
9748 section index as some sections may have been removed, and
9749 strip_excluded_output_sections doesn't renumber the indices. */
9750 for (section = info->output_bfd->sections, top_index = 0;
9751 section != NULL;
9752 section = section->next)
9753 {
9754 if (top_index < section->index)
9755 top_index = section->index;
9756 }
9757
9758 htab->top_index = top_index;
9759 amt = sizeof (asection *) * (top_index + 1);
9760 input_list = bfd_zmalloc (amt);
9761 htab->input_list = input_list;
9762 if (input_list == NULL)
9763 return -1;
9764
9765 return 1;
9766 }
9767
9768 /* Set up for first pass at multitoc partitioning. */
9769
9770 void
9771 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
9772 {
9773 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9774
9775 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
9776 htab->toc_curr = elf_gp (info->output_bfd);
9777 htab->toc_bfd = NULL;
9778 htab->toc_first_sec = NULL;
9779 }
9780
9781 /* The linker repeatedly calls this function for each TOC input section
9782 and linker generated GOT section. Group input bfds such that the toc
9783 within a group is less than 64k in size. */
9784
9785 bfd_boolean
9786 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9787 {
9788 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9789 bfd_vma addr, off;
9790
9791 if (htab == NULL)
9792 return FALSE;
9793
9794 if (!htab->second_toc_pass)
9795 {
9796 /* Keep track of the first .toc or .got section for this input bfd. */
9797 if (htab->toc_bfd != isec->owner)
9798 {
9799 htab->toc_bfd = isec->owner;
9800 htab->toc_first_sec = isec;
9801 }
9802
9803 addr = isec->output_offset + isec->output_section->vma;
9804 off = addr - htab->toc_curr;
9805 if (off + isec->size > 0x10000)
9806 {
9807 addr = (htab->toc_first_sec->output_offset
9808 + htab->toc_first_sec->output_section->vma);
9809 htab->toc_curr = addr;
9810 }
9811
9812 /* toc_curr is the base address of this toc group. Set elf_gp
9813 for the input section to be the offset relative to the
9814 output toc base plus 0x8000. Making the input elf_gp an
9815 offset allows us to move the toc as a whole without
9816 recalculating input elf_gp. */
9817 off = htab->toc_curr - elf_gp (isec->output_section->owner);
9818 off += TOC_BASE_OFF;
9819
9820 /* Die if someone uses a linker script that doesn't keep input
9821 file .toc and .got together. */
9822 if (elf_gp (isec->owner) != 0
9823 && elf_gp (isec->owner) != off)
9824 return FALSE;
9825
9826 elf_gp (isec->owner) = off;
9827 return TRUE;
9828 }
9829
9830 /* During the second pass toc_first_sec points to the start of
9831 a toc group, and toc_curr is used to track the old elf_gp.
9832 We use toc_bfd to ensure we only look at each bfd once. */
9833 if (htab->toc_bfd == isec->owner)
9834 return TRUE;
9835 htab->toc_bfd = isec->owner;
9836
9837 if (htab->toc_first_sec == NULL
9838 || htab->toc_curr != elf_gp (isec->owner))
9839 {
9840 htab->toc_curr = elf_gp (isec->owner);
9841 htab->toc_first_sec = isec;
9842 }
9843 addr = (htab->toc_first_sec->output_offset
9844 + htab->toc_first_sec->output_section->vma);
9845 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
9846 elf_gp (isec->owner) = off;
9847
9848 return TRUE;
9849 }
9850
9851 /* This function removes unneeded got entries (those with got.offset == -1)
9852 and merges entries in the same toc group. */
9853
9854 static void
9855 merge_got_entries (struct got_entry **pent)
9856 {
9857 struct got_entry *ent, *ent2;
9858
9859 while ((ent = *pent) != NULL)
9860 {
9861 if (!ent->is_indirect)
9862 {
9863 if (ent->got.offset == (bfd_vma) -1)
9864 {
9865 *pent = ent->next;
9866 continue;
9867 }
9868 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9869 if (!ent2->is_indirect
9870 && ent2->got.offset != (bfd_vma) -1
9871 && ent2->addend == ent->addend
9872 && ent2->tls_type == ent->tls_type
9873 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9874 {
9875 ent2->is_indirect = TRUE;
9876 ent2->got.ent = ent;
9877 }
9878 }
9879 pent = &ent->next;
9880 }
9881 }
9882
9883 /* Called via elf_link_hash_traverse to merge GOT entries for global
9884 symbol H. */
9885
9886 static bfd_boolean
9887 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9888 {
9889 if (h->root.type == bfd_link_hash_indirect)
9890 return TRUE;
9891
9892 if (h->root.type == bfd_link_hash_warning)
9893 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9894
9895 merge_got_entries (&h->got.glist);
9896
9897 return TRUE;
9898 }
9899
9900 /* Called via elf_link_hash_traverse to allocate GOT entries for global
9901 symbol H. */
9902
9903 static bfd_boolean
9904 reallocate_got (struct elf_link_hash_entry *h, void *inf)
9905 {
9906 struct got_entry *gent;
9907
9908 if (h->root.type == bfd_link_hash_indirect)
9909 return TRUE;
9910
9911 if (h->root.type == bfd_link_hash_warning)
9912 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9913
9914 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9915 if (!gent->is_indirect)
9916 allocate_got (h, (struct bfd_link_info *) inf, gent);
9917 return TRUE;
9918 }
9919
9920 /* Called on the first multitoc pass after the last call to
9921 ppc64_elf_next_toc_section. This function removes duplicate GOT
9922 entries. */
9923
9924 bfd_boolean
9925 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
9926 {
9927 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9928 struct bfd *ibfd, *ibfd2;
9929 bfd_boolean done_something;
9930
9931 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
9932
9933 /* Merge local got entries within a toc group. */
9934 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9935 {
9936 struct got_entry **lgot_ents;
9937 struct got_entry **end_lgot_ents;
9938 Elf_Internal_Shdr *symtab_hdr;
9939 bfd_size_type locsymcount;
9940
9941 if (!is_ppc64_elf (ibfd))
9942 continue;
9943
9944 lgot_ents = elf_local_got_ents (ibfd);
9945 if (!lgot_ents)
9946 continue;
9947
9948 symtab_hdr = &elf_symtab_hdr (ibfd);
9949 locsymcount = symtab_hdr->sh_info;
9950 end_lgot_ents = lgot_ents + locsymcount;
9951
9952 for (; lgot_ents < end_lgot_ents; ++lgot_ents)
9953 merge_got_entries (lgot_ents);
9954 }
9955
9956 /* And the same for global sym got entries. */
9957 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
9958
9959 /* And tlsld_got. */
9960 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9961 {
9962 struct got_entry *ent, *ent2;
9963
9964 if (!is_ppc64_elf (ibfd))
9965 continue;
9966
9967 ent = ppc64_tlsld_got (ibfd);
9968 if (!ent->is_indirect
9969 && ent->got.offset != (bfd_vma) -1)
9970 {
9971 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
9972 {
9973 if (!is_ppc64_elf (ibfd2))
9974 continue;
9975
9976 ent2 = ppc64_tlsld_got (ibfd2);
9977 if (!ent2->is_indirect
9978 && ent2->got.offset != (bfd_vma) -1
9979 && elf_gp (ibfd2) == elf_gp (ibfd))
9980 {
9981 ent2->is_indirect = TRUE;
9982 ent2->got.ent = ent;
9983 }
9984 }
9985 }
9986 }
9987
9988 /* Zap sizes of got sections. */
9989 htab->reliplt->rawsize = htab->reliplt->size;
9990 htab->reliplt->size -= htab->got_reli_size;
9991 htab->got_reli_size = 0;
9992
9993 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9994 {
9995 asection *got, *relgot;
9996
9997 if (!is_ppc64_elf (ibfd))
9998 continue;
9999
10000 got = ppc64_elf_tdata (ibfd)->got;
10001 if (got != NULL)
10002 {
10003 got->rawsize = got->size;
10004 got->size = 0;
10005 relgot = ppc64_elf_tdata (ibfd)->relgot;
10006 relgot->rawsize = relgot->size;
10007 relgot->size = 0;
10008 }
10009 }
10010
10011 /* Now reallocate the got, local syms first. We don't need to
10012 allocate section contents again since we never increase size. */
10013 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10014 {
10015 struct got_entry **lgot_ents;
10016 struct got_entry **end_lgot_ents;
10017 struct plt_entry **local_plt;
10018 struct plt_entry **end_local_plt;
10019 char *lgot_masks;
10020 bfd_size_type locsymcount;
10021 Elf_Internal_Shdr *symtab_hdr;
10022 asection *s, *srel;
10023
10024 if (!is_ppc64_elf (ibfd))
10025 continue;
10026
10027 lgot_ents = elf_local_got_ents (ibfd);
10028 if (!lgot_ents)
10029 continue;
10030
10031 symtab_hdr = &elf_symtab_hdr (ibfd);
10032 locsymcount = symtab_hdr->sh_info;
10033 end_lgot_ents = lgot_ents + locsymcount;
10034 local_plt = (struct plt_entry **) end_lgot_ents;
10035 end_local_plt = local_plt + locsymcount;
10036 lgot_masks = (char *) end_local_plt;
10037 s = ppc64_elf_tdata (ibfd)->got;
10038 srel = ppc64_elf_tdata (ibfd)->relgot;
10039 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10040 {
10041 struct got_entry *ent;
10042
10043 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10044 if (!ent->is_indirect)
10045 {
10046 unsigned int num = 1;
10047 ent->got.offset = s->size;
10048 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10049 num = 2;
10050 s->size += num * 8;
10051 if (info->shared)
10052 srel->size += num * sizeof (Elf64_External_Rela);
10053 else if ((*lgot_masks & PLT_IFUNC) != 0)
10054 {
10055 htab->reliplt->size
10056 += num * sizeof (Elf64_External_Rela);
10057 htab->got_reli_size
10058 += num * sizeof (Elf64_External_Rela);
10059 }
10060 }
10061 }
10062 }
10063
10064 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10065
10066 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10067 {
10068 struct got_entry *ent;
10069
10070 if (!is_ppc64_elf (ibfd))
10071 continue;
10072
10073 ent = ppc64_tlsld_got (ibfd);
10074 if (!ent->is_indirect
10075 && ent->got.offset != (bfd_vma) -1)
10076 {
10077 asection *s = ppc64_elf_tdata (ibfd)->got;
10078 ent->got.offset = s->size;
10079 s->size += 16;
10080 if (info->shared)
10081 {
10082 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10083 srel->size += sizeof (Elf64_External_Rela);
10084 }
10085 }
10086 }
10087
10088 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10089 if (!done_something)
10090 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10091 {
10092 asection *got;
10093
10094 if (!is_ppc64_elf (ibfd))
10095 continue;
10096
10097 got = ppc64_elf_tdata (ibfd)->got;
10098 if (got != NULL)
10099 {
10100 done_something = got->rawsize != got->size;
10101 if (done_something)
10102 break;
10103 }
10104 }
10105
10106 if (done_something)
10107 (*htab->layout_sections_again) ();
10108
10109 /* Set up for second pass over toc sections to recalculate elf_gp
10110 on input sections. */
10111 htab->toc_bfd = NULL;
10112 htab->toc_first_sec = NULL;
10113 htab->second_toc_pass = TRUE;
10114 return done_something;
10115 }
10116
10117 /* Called after second pass of multitoc partitioning. */
10118
10119 void
10120 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10121 {
10122 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10123
10124 if (htab == NULL)
10125 return;
10126
10127 /* After the second pass, toc_curr tracks the TOC offset used
10128 for code sections below in ppc64_elf_next_input_section. */
10129 htab->toc_curr = TOC_BASE_OFF;
10130 }
10131
10132 /* No toc references were found in ISEC. If the code in ISEC makes no
10133 calls, then there's no need to use toc adjusting stubs when branching
10134 into ISEC. Actually, indirect calls from ISEC are OK as they will
10135 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10136 needed, and 2 if a cyclical call-graph was found but no other reason
10137 for a stub was detected. If called from the top level, a return of
10138 2 means the same as a return of 0. */
10139
10140 static int
10141 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10142 {
10143 Elf_Internal_Rela *relstart, *rel;
10144 Elf_Internal_Sym *local_syms;
10145 int ret;
10146 struct ppc_link_hash_table *htab;
10147
10148 /* We know none of our code bearing sections will need toc stubs. */
10149 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10150 return 0;
10151
10152 if (isec->size == 0)
10153 return 0;
10154
10155 if (isec->output_section == NULL)
10156 return 0;
10157
10158 if (isec->reloc_count == 0)
10159 return 0;
10160
10161 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10162 info->keep_memory);
10163 if (relstart == NULL)
10164 return -1;
10165
10166 /* Look for branches to outside of this section. */
10167 local_syms = NULL;
10168 ret = 0;
10169 htab = ppc_hash_table (info);
10170 if (htab == NULL)
10171 return -1;
10172
10173 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10174 {
10175 enum elf_ppc64_reloc_type r_type;
10176 unsigned long r_symndx;
10177 struct elf_link_hash_entry *h;
10178 struct ppc_link_hash_entry *eh;
10179 Elf_Internal_Sym *sym;
10180 asection *sym_sec;
10181 struct _opd_sec_data *opd;
10182 bfd_vma sym_value;
10183 bfd_vma dest;
10184
10185 r_type = ELF64_R_TYPE (rel->r_info);
10186 if (r_type != R_PPC64_REL24
10187 && r_type != R_PPC64_REL14
10188 && r_type != R_PPC64_REL14_BRTAKEN
10189 && r_type != R_PPC64_REL14_BRNTAKEN)
10190 continue;
10191
10192 r_symndx = ELF64_R_SYM (rel->r_info);
10193 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10194 isec->owner))
10195 {
10196 ret = -1;
10197 break;
10198 }
10199
10200 /* Calls to dynamic lib functions go through a plt call stub
10201 that uses r2. */
10202 eh = (struct ppc_link_hash_entry *) h;
10203 if (eh != NULL
10204 && (eh->elf.plt.plist != NULL
10205 || (eh->oh != NULL
10206 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10207 {
10208 ret = 1;
10209 break;
10210 }
10211
10212 if (sym_sec == NULL)
10213 /* Ignore other undefined symbols. */
10214 continue;
10215
10216 /* Assume branches to other sections not included in the link need
10217 stubs too, to cover -R and absolute syms. */
10218 if (sym_sec->output_section == NULL)
10219 {
10220 ret = 1;
10221 break;
10222 }
10223
10224 if (h == NULL)
10225 sym_value = sym->st_value;
10226 else
10227 {
10228 if (h->root.type != bfd_link_hash_defined
10229 && h->root.type != bfd_link_hash_defweak)
10230 abort ();
10231 sym_value = h->root.u.def.value;
10232 }
10233 sym_value += rel->r_addend;
10234
10235 /* If this branch reloc uses an opd sym, find the code section. */
10236 opd = get_opd_info (sym_sec);
10237 if (opd != NULL)
10238 {
10239 if (h == NULL && opd->adjust != NULL)
10240 {
10241 long adjust;
10242
10243 adjust = opd->adjust[sym->st_value / 8];
10244 if (adjust == -1)
10245 /* Assume deleted functions won't ever be called. */
10246 continue;
10247 sym_value += adjust;
10248 }
10249
10250 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10251 if (dest == (bfd_vma) -1)
10252 continue;
10253 }
10254 else
10255 dest = (sym_value
10256 + sym_sec->output_offset
10257 + sym_sec->output_section->vma);
10258
10259 /* Ignore branch to self. */
10260 if (sym_sec == isec)
10261 continue;
10262
10263 /* If the called function uses the toc, we need a stub. */
10264 if (sym_sec->has_toc_reloc
10265 || sym_sec->makes_toc_func_call)
10266 {
10267 ret = 1;
10268 break;
10269 }
10270
10271 /* Assume any branch that needs a long branch stub might in fact
10272 need a plt_branch stub. A plt_branch stub uses r2. */
10273 else if (dest - (isec->output_offset
10274 + isec->output_section->vma
10275 + rel->r_offset) + (1 << 25) >= (2 << 25))
10276 {
10277 ret = 1;
10278 break;
10279 }
10280
10281 /* If calling back to a section in the process of being tested, we
10282 can't say for sure that no toc adjusting stubs are needed, so
10283 don't return zero. */
10284 else if (sym_sec->call_check_in_progress)
10285 ret = 2;
10286
10287 /* Branches to another section that itself doesn't have any TOC
10288 references are OK. Recursively call ourselves to check. */
10289 else if (sym_sec->id <= htab->top_id
10290 && htab->stub_group[sym_sec->id].toc_off == 0)
10291 {
10292 int recur;
10293
10294 /* Mark current section as indeterminate, so that other
10295 sections that call back to current won't be marked as
10296 known. */
10297 isec->call_check_in_progress = 1;
10298 recur = toc_adjusting_stub_needed (info, sym_sec);
10299 isec->call_check_in_progress = 0;
10300
10301 if (recur < 0)
10302 {
10303 /* An error. Exit. */
10304 ret = -1;
10305 break;
10306 }
10307 else if (recur <= 1)
10308 {
10309 /* Known result. Mark as checked and set section flag. */
10310 htab->stub_group[sym_sec->id].toc_off = 1;
10311 if (recur != 0)
10312 {
10313 sym_sec->makes_toc_func_call = 1;
10314 ret = 1;
10315 break;
10316 }
10317 }
10318 else
10319 {
10320 /* Unknown result. Continue checking. */
10321 ret = 2;
10322 }
10323 }
10324 }
10325
10326 if (local_syms != NULL
10327 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
10328 free (local_syms);
10329 if (elf_section_data (isec)->relocs != relstart)
10330 free (relstart);
10331
10332 return ret;
10333 }
10334
10335 /* The linker repeatedly calls this function for each input section,
10336 in the order that input sections are linked into output sections.
10337 Build lists of input sections to determine groupings between which
10338 we may insert linker stubs. */
10339
10340 bfd_boolean
10341 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10342 {
10343 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10344
10345 if (htab == NULL)
10346 return FALSE;
10347
10348 if ((isec->output_section->flags & SEC_CODE) != 0
10349 && isec->output_section->index <= htab->top_index)
10350 {
10351 asection **list = htab->input_list + isec->output_section->index;
10352 /* Steal the link_sec pointer for our list. */
10353 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10354 /* This happens to make the list in reverse order,
10355 which is what we want. */
10356 PREV_SEC (isec) = *list;
10357 *list = isec;
10358 }
10359
10360 if (htab->multi_toc_needed)
10361 {
10362 /* If a code section has a function that uses the TOC then we need
10363 to use the right TOC (obviously). Also, make sure that .opd gets
10364 the correct TOC value for R_PPC64_TOC relocs that don't have or
10365 can't find their function symbol (shouldn't ever happen now).
10366 Also specially treat .fixup for the linux kernel. .fixup
10367 contains branches, but only back to the function that hit an
10368 exception. */
10369 if (isec->has_toc_reloc
10370 || (isec->flags & SEC_CODE) == 0
10371 || strcmp (isec->name, ".fixup") == 0)
10372 {
10373 if (elf_gp (isec->owner) != 0)
10374 htab->toc_curr = elf_gp (isec->owner);
10375 }
10376 else if (htab->stub_group[isec->id].toc_off == 0)
10377 {
10378 int ret = toc_adjusting_stub_needed (info, isec);
10379 if (ret < 0)
10380 return FALSE;
10381 else
10382 isec->makes_toc_func_call = ret & 1;
10383 }
10384 }
10385
10386 /* Functions that don't use the TOC can belong in any TOC group.
10387 Use the last TOC base. This happens to make _init and _fini
10388 pasting work. */
10389 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10390 return TRUE;
10391 }
10392
10393 /* See whether we can group stub sections together. Grouping stub
10394 sections may result in fewer stubs. More importantly, we need to
10395 put all .init* and .fini* stubs at the beginning of the .init or
10396 .fini output sections respectively, because glibc splits the
10397 _init and _fini functions into multiple parts. Putting a stub in
10398 the middle of a function is not a good idea. */
10399
10400 static void
10401 group_sections (struct ppc_link_hash_table *htab,
10402 bfd_size_type stub_group_size,
10403 bfd_boolean stubs_always_before_branch)
10404 {
10405 asection **list;
10406 bfd_size_type stub14_group_size;
10407 bfd_boolean suppress_size_errors;
10408
10409 suppress_size_errors = FALSE;
10410 stub14_group_size = stub_group_size;
10411 if (stub_group_size == 1)
10412 {
10413 /* Default values. */
10414 if (stubs_always_before_branch)
10415 {
10416 stub_group_size = 0x1e00000;
10417 stub14_group_size = 0x7800;
10418 }
10419 else
10420 {
10421 stub_group_size = 0x1c00000;
10422 stub14_group_size = 0x7000;
10423 }
10424 suppress_size_errors = TRUE;
10425 }
10426
10427 list = htab->input_list + htab->top_index;
10428 do
10429 {
10430 asection *tail = *list;
10431 while (tail != NULL)
10432 {
10433 asection *curr;
10434 asection *prev;
10435 bfd_size_type total;
10436 bfd_boolean big_sec;
10437 bfd_vma curr_toc;
10438
10439 curr = tail;
10440 total = tail->size;
10441 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
10442 ? stub14_group_size : stub_group_size);
10443 if (big_sec && !suppress_size_errors)
10444 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10445 tail->owner, tail);
10446 curr_toc = htab->stub_group[tail->id].toc_off;
10447
10448 while ((prev = PREV_SEC (curr)) != NULL
10449 && ((total += curr->output_offset - prev->output_offset)
10450 < (ppc64_elf_section_data (prev)->has_14bit_branch
10451 ? stub14_group_size : stub_group_size))
10452 && htab->stub_group[prev->id].toc_off == curr_toc)
10453 curr = prev;
10454
10455 /* OK, the size from the start of CURR to the end is less
10456 than stub_group_size and thus can be handled by one stub
10457 section. (or the tail section is itself larger than
10458 stub_group_size, in which case we may be toast.) We
10459 should really be keeping track of the total size of stubs
10460 added here, as stubs contribute to the final output
10461 section size. That's a little tricky, and this way will
10462 only break if stubs added make the total size more than
10463 2^25, ie. for the default stub_group_size, if stubs total
10464 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10465 do
10466 {
10467 prev = PREV_SEC (tail);
10468 /* Set up this stub group. */
10469 htab->stub_group[tail->id].link_sec = curr;
10470 }
10471 while (tail != curr && (tail = prev) != NULL);
10472
10473 /* But wait, there's more! Input sections up to stub_group_size
10474 bytes before the stub section can be handled by it too.
10475 Don't do this if we have a really large section after the
10476 stubs, as adding more stubs increases the chance that
10477 branches may not reach into the stub section. */
10478 if (!stubs_always_before_branch && !big_sec)
10479 {
10480 total = 0;
10481 while (prev != NULL
10482 && ((total += tail->output_offset - prev->output_offset)
10483 < (ppc64_elf_section_data (prev)->has_14bit_branch
10484 ? stub14_group_size : stub_group_size))
10485 && htab->stub_group[prev->id].toc_off == curr_toc)
10486 {
10487 tail = prev;
10488 prev = PREV_SEC (tail);
10489 htab->stub_group[tail->id].link_sec = curr;
10490 }
10491 }
10492 tail = prev;
10493 }
10494 }
10495 while (list-- != htab->input_list);
10496 free (htab->input_list);
10497 #undef PREV_SEC
10498 }
10499
10500 /* Determine and set the size of the stub section for a final link.
10501
10502 The basic idea here is to examine all the relocations looking for
10503 PC-relative calls to a target that is unreachable with a "bl"
10504 instruction. */
10505
10506 bfd_boolean
10507 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10508 {
10509 bfd_size_type stub_group_size;
10510 bfd_boolean stubs_always_before_branch;
10511 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10512
10513 if (htab == NULL)
10514 return FALSE;
10515
10516 stubs_always_before_branch = group_size < 0;
10517 if (group_size < 0)
10518 stub_group_size = -group_size;
10519 else
10520 stub_group_size = group_size;
10521
10522 group_sections (htab, stub_group_size, stubs_always_before_branch);
10523
10524 while (1)
10525 {
10526 bfd *input_bfd;
10527 unsigned int bfd_indx;
10528 asection *stub_sec;
10529
10530 htab->stub_iteration += 1;
10531
10532 for (input_bfd = info->input_bfds, bfd_indx = 0;
10533 input_bfd != NULL;
10534 input_bfd = input_bfd->link_next, bfd_indx++)
10535 {
10536 Elf_Internal_Shdr *symtab_hdr;
10537 asection *section;
10538 Elf_Internal_Sym *local_syms = NULL;
10539
10540 if (!is_ppc64_elf (input_bfd))
10541 continue;
10542
10543 /* We'll need the symbol table in a second. */
10544 symtab_hdr = &elf_symtab_hdr (input_bfd);
10545 if (symtab_hdr->sh_info == 0)
10546 continue;
10547
10548 /* Walk over each section attached to the input bfd. */
10549 for (section = input_bfd->sections;
10550 section != NULL;
10551 section = section->next)
10552 {
10553 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10554
10555 /* If there aren't any relocs, then there's nothing more
10556 to do. */
10557 if ((section->flags & SEC_RELOC) == 0
10558 || (section->flags & SEC_ALLOC) == 0
10559 || (section->flags & SEC_LOAD) == 0
10560 || (section->flags & SEC_CODE) == 0
10561 || section->reloc_count == 0)
10562 continue;
10563
10564 /* If this section is a link-once section that will be
10565 discarded, then don't create any stubs. */
10566 if (section->output_section == NULL
10567 || section->output_section->owner != info->output_bfd)
10568 continue;
10569
10570 /* Get the relocs. */
10571 internal_relocs
10572 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10573 info->keep_memory);
10574 if (internal_relocs == NULL)
10575 goto error_ret_free_local;
10576
10577 /* Now examine each relocation. */
10578 irela = internal_relocs;
10579 irelaend = irela + section->reloc_count;
10580 for (; irela < irelaend; irela++)
10581 {
10582 enum elf_ppc64_reloc_type r_type;
10583 unsigned int r_indx;
10584 enum ppc_stub_type stub_type;
10585 struct ppc_stub_hash_entry *stub_entry;
10586 asection *sym_sec, *code_sec;
10587 bfd_vma sym_value, code_value;
10588 bfd_vma destination;
10589 bfd_boolean ok_dest;
10590 struct ppc_link_hash_entry *hash;
10591 struct ppc_link_hash_entry *fdh;
10592 struct elf_link_hash_entry *h;
10593 Elf_Internal_Sym *sym;
10594 char *stub_name;
10595 const asection *id_sec;
10596 struct _opd_sec_data *opd;
10597 struct plt_entry *plt_ent;
10598
10599 r_type = ELF64_R_TYPE (irela->r_info);
10600 r_indx = ELF64_R_SYM (irela->r_info);
10601
10602 if (r_type >= R_PPC64_max)
10603 {
10604 bfd_set_error (bfd_error_bad_value);
10605 goto error_ret_free_internal;
10606 }
10607
10608 /* Only look for stubs on branch instructions. */
10609 if (r_type != R_PPC64_REL24
10610 && r_type != R_PPC64_REL14
10611 && r_type != R_PPC64_REL14_BRTAKEN
10612 && r_type != R_PPC64_REL14_BRNTAKEN)
10613 continue;
10614
10615 /* Now determine the call target, its name, value,
10616 section. */
10617 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10618 r_indx, input_bfd))
10619 goto error_ret_free_internal;
10620 hash = (struct ppc_link_hash_entry *) h;
10621
10622 ok_dest = FALSE;
10623 fdh = NULL;
10624 sym_value = 0;
10625 if (hash == NULL)
10626 {
10627 sym_value = sym->st_value;
10628 ok_dest = TRUE;
10629 }
10630 else if (hash->elf.root.type == bfd_link_hash_defined
10631 || hash->elf.root.type == bfd_link_hash_defweak)
10632 {
10633 sym_value = hash->elf.root.u.def.value;
10634 if (sym_sec->output_section != NULL)
10635 ok_dest = TRUE;
10636 }
10637 else if (hash->elf.root.type == bfd_link_hash_undefweak
10638 || hash->elf.root.type == bfd_link_hash_undefined)
10639 {
10640 /* Recognise an old ABI func code entry sym, and
10641 use the func descriptor sym instead if it is
10642 defined. */
10643 if (hash->elf.root.root.string[0] == '.'
10644 && (fdh = lookup_fdh (hash, htab)) != NULL)
10645 {
10646 if (fdh->elf.root.type == bfd_link_hash_defined
10647 || fdh->elf.root.type == bfd_link_hash_defweak)
10648 {
10649 sym_sec = fdh->elf.root.u.def.section;
10650 sym_value = fdh->elf.root.u.def.value;
10651 if (sym_sec->output_section != NULL)
10652 ok_dest = TRUE;
10653 }
10654 else
10655 fdh = NULL;
10656 }
10657 }
10658 else
10659 {
10660 bfd_set_error (bfd_error_bad_value);
10661 goto error_ret_free_internal;
10662 }
10663
10664 destination = 0;
10665 if (ok_dest)
10666 {
10667 sym_value += irela->r_addend;
10668 destination = (sym_value
10669 + sym_sec->output_offset
10670 + sym_sec->output_section->vma);
10671 }
10672
10673 code_sec = sym_sec;
10674 code_value = sym_value;
10675 opd = get_opd_info (sym_sec);
10676 if (opd != NULL)
10677 {
10678 bfd_vma dest;
10679
10680 if (hash == NULL && opd->adjust != NULL)
10681 {
10682 long adjust = opd->adjust[sym_value / 8];
10683 if (adjust == -1)
10684 continue;
10685 code_value += adjust;
10686 sym_value += adjust;
10687 }
10688 dest = opd_entry_value (sym_sec, sym_value,
10689 &code_sec, &code_value);
10690 if (dest != (bfd_vma) -1)
10691 {
10692 destination = dest;
10693 if (fdh != NULL)
10694 {
10695 /* Fixup old ABI sym to point at code
10696 entry. */
10697 hash->elf.root.type = bfd_link_hash_defweak;
10698 hash->elf.root.u.def.section = code_sec;
10699 hash->elf.root.u.def.value = code_value;
10700 }
10701 }
10702 }
10703
10704 /* Determine what (if any) linker stub is needed. */
10705 plt_ent = NULL;
10706 stub_type = ppc_type_of_stub (section, irela, &hash,
10707 &plt_ent, destination);
10708
10709 if (stub_type != ppc_stub_plt_call)
10710 {
10711 /* Check whether we need a TOC adjusting stub.
10712 Since the linker pastes together pieces from
10713 different object files when creating the
10714 _init and _fini functions, it may be that a
10715 call to what looks like a local sym is in
10716 fact a call needing a TOC adjustment. */
10717 if (code_sec != NULL
10718 && code_sec->output_section != NULL
10719 && (htab->stub_group[code_sec->id].toc_off
10720 != htab->stub_group[section->id].toc_off)
10721 && (code_sec->has_toc_reloc
10722 || code_sec->makes_toc_func_call))
10723 stub_type = ppc_stub_long_branch_r2off;
10724 }
10725
10726 if (stub_type == ppc_stub_none)
10727 continue;
10728
10729 /* __tls_get_addr calls might be eliminated. */
10730 if (stub_type != ppc_stub_plt_call
10731 && hash != NULL
10732 && (hash == htab->tls_get_addr
10733 || hash == htab->tls_get_addr_fd)
10734 && section->has_tls_reloc
10735 && irela != internal_relocs)
10736 {
10737 /* Get tls info. */
10738 char *tls_mask;
10739
10740 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10741 irela - 1, input_bfd))
10742 goto error_ret_free_internal;
10743 if (*tls_mask != 0)
10744 continue;
10745 }
10746
10747 /* Support for grouping stub sections. */
10748 id_sec = htab->stub_group[section->id].link_sec;
10749
10750 /* Get the name of this stub. */
10751 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10752 if (!stub_name)
10753 goto error_ret_free_internal;
10754
10755 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10756 stub_name, FALSE, FALSE);
10757 if (stub_entry != NULL)
10758 {
10759 /* The proper stub has already been created. */
10760 free (stub_name);
10761 continue;
10762 }
10763
10764 stub_entry = ppc_add_stub (stub_name, section, htab);
10765 if (stub_entry == NULL)
10766 {
10767 free (stub_name);
10768 error_ret_free_internal:
10769 if (elf_section_data (section)->relocs == NULL)
10770 free (internal_relocs);
10771 error_ret_free_local:
10772 if (local_syms != NULL
10773 && (symtab_hdr->contents
10774 != (unsigned char *) local_syms))
10775 free (local_syms);
10776 return FALSE;
10777 }
10778
10779 stub_entry->stub_type = stub_type;
10780 if (stub_type != ppc_stub_plt_call)
10781 {
10782 stub_entry->target_value = code_value;
10783 stub_entry->target_section = code_sec;
10784 }
10785 else
10786 {
10787 stub_entry->target_value = sym_value;
10788 stub_entry->target_section = sym_sec;
10789 }
10790 stub_entry->h = hash;
10791 stub_entry->plt_ent = plt_ent;
10792 stub_entry->addend = irela->r_addend;
10793
10794 if (stub_entry->h != NULL)
10795 htab->stub_globals += 1;
10796 }
10797
10798 /* We're done with the internal relocs, free them. */
10799 if (elf_section_data (section)->relocs != internal_relocs)
10800 free (internal_relocs);
10801 }
10802
10803 if (local_syms != NULL
10804 && symtab_hdr->contents != (unsigned char *) local_syms)
10805 {
10806 if (!info->keep_memory)
10807 free (local_syms);
10808 else
10809 symtab_hdr->contents = (unsigned char *) local_syms;
10810 }
10811 }
10812
10813 /* We may have added some stubs. Find out the new size of the
10814 stub sections. */
10815 for (stub_sec = htab->stub_bfd->sections;
10816 stub_sec != NULL;
10817 stub_sec = stub_sec->next)
10818 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10819 {
10820 stub_sec->rawsize = stub_sec->size;
10821 stub_sec->size = 0;
10822 stub_sec->reloc_count = 0;
10823 stub_sec->flags &= ~SEC_RELOC;
10824 }
10825
10826 htab->brlt->size = 0;
10827 htab->brlt->reloc_count = 0;
10828 htab->brlt->flags &= ~SEC_RELOC;
10829 if (htab->relbrlt != NULL)
10830 htab->relbrlt->size = 0;
10831
10832 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10833
10834 if (info->emitrelocations
10835 && htab->glink != NULL && htab->glink->size != 0)
10836 {
10837 htab->glink->reloc_count = 1;
10838 htab->glink->flags |= SEC_RELOC;
10839 }
10840
10841 for (stub_sec = htab->stub_bfd->sections;
10842 stub_sec != NULL;
10843 stub_sec = stub_sec->next)
10844 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10845 && stub_sec->rawsize != stub_sec->size)
10846 break;
10847
10848 /* Exit from this loop when no stubs have been added, and no stubs
10849 have changed size. */
10850 if (stub_sec == NULL)
10851 break;
10852
10853 /* Ask the linker to do its stuff. */
10854 (*htab->layout_sections_again) ();
10855 }
10856
10857 /* It would be nice to strip htab->brlt from the output if the
10858 section is empty, but it's too late. If we strip sections here,
10859 the dynamic symbol table is corrupted since the section symbol
10860 for the stripped section isn't written. */
10861
10862 return TRUE;
10863 }
10864
10865 /* Called after we have determined section placement. If sections
10866 move, we'll be called again. Provide a value for TOCstart. */
10867
10868 bfd_vma
10869 ppc64_elf_toc (bfd *obfd)
10870 {
10871 asection *s;
10872 bfd_vma TOCstart;
10873
10874 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10875 order. The TOC starts where the first of these sections starts. */
10876 s = bfd_get_section_by_name (obfd, ".got");
10877 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10878 s = bfd_get_section_by_name (obfd, ".toc");
10879 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10880 s = bfd_get_section_by_name (obfd, ".tocbss");
10881 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10882 s = bfd_get_section_by_name (obfd, ".plt");
10883 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10884 {
10885 /* This may happen for
10886 o references to TOC base (SYM@toc / TOC[tc0]) without a
10887 .toc directive
10888 o bad linker script
10889 o --gc-sections and empty TOC sections
10890
10891 FIXME: Warn user? */
10892
10893 /* Look for a likely section. We probably won't even be
10894 using TOCstart. */
10895 for (s = obfd->sections; s != NULL; s = s->next)
10896 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10897 | SEC_EXCLUDE))
10898 == (SEC_ALLOC | SEC_SMALL_DATA))
10899 break;
10900 if (s == NULL)
10901 for (s = obfd->sections; s != NULL; s = s->next)
10902 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10903 == (SEC_ALLOC | SEC_SMALL_DATA))
10904 break;
10905 if (s == NULL)
10906 for (s = obfd->sections; s != NULL; s = s->next)
10907 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10908 == SEC_ALLOC)
10909 break;
10910 if (s == NULL)
10911 for (s = obfd->sections; s != NULL; s = s->next)
10912 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10913 break;
10914 }
10915
10916 TOCstart = 0;
10917 if (s != NULL)
10918 TOCstart = s->output_section->vma + s->output_offset;
10919
10920 return TOCstart;
10921 }
10922
10923 /* Build all the stubs associated with the current output file.
10924 The stubs are kept in a hash table attached to the main linker
10925 hash table. This function is called via gldelf64ppc_finish. */
10926
10927 bfd_boolean
10928 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10929 struct bfd_link_info *info,
10930 char **stats)
10931 {
10932 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10933 asection *stub_sec;
10934 bfd_byte *p;
10935 int stub_sec_count = 0;
10936
10937 if (htab == NULL)
10938 return FALSE;
10939
10940 htab->emit_stub_syms = emit_stub_syms;
10941
10942 /* Allocate memory to hold the linker stubs. */
10943 for (stub_sec = htab->stub_bfd->sections;
10944 stub_sec != NULL;
10945 stub_sec = stub_sec->next)
10946 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10947 && stub_sec->size != 0)
10948 {
10949 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10950 if (stub_sec->contents == NULL)
10951 return FALSE;
10952 /* We want to check that built size is the same as calculated
10953 size. rawsize is a convenient location to use. */
10954 stub_sec->rawsize = stub_sec->size;
10955 stub_sec->size = 0;
10956 }
10957
10958 if (htab->glink != NULL && htab->glink->size != 0)
10959 {
10960 unsigned int indx;
10961 bfd_vma plt0;
10962
10963 /* Build the .glink plt call stub. */
10964 if (htab->emit_stub_syms)
10965 {
10966 struct elf_link_hash_entry *h;
10967 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10968 TRUE, FALSE, FALSE);
10969 if (h == NULL)
10970 return FALSE;
10971 if (h->root.type == bfd_link_hash_new)
10972 {
10973 h->root.type = bfd_link_hash_defined;
10974 h->root.u.def.section = htab->glink;
10975 h->root.u.def.value = 8;
10976 h->ref_regular = 1;
10977 h->def_regular = 1;
10978 h->ref_regular_nonweak = 1;
10979 h->forced_local = 1;
10980 h->non_elf = 0;
10981 }
10982 }
10983 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10984 if (info->emitrelocations)
10985 {
10986 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10987 if (r == NULL)
10988 return FALSE;
10989 r->r_offset = (htab->glink->output_offset
10990 + htab->glink->output_section->vma);
10991 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10992 r->r_addend = plt0;
10993 }
10994 p = htab->glink->contents;
10995 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10996 bfd_put_64 (htab->glink->owner, plt0, p);
10997 p += 8;
10998 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10999 p += 4;
11000 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11001 p += 4;
11002 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11003 p += 4;
11004 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11005 p += 4;
11006 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11007 p += 4;
11008 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11009 p += 4;
11010 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11011 p += 4;
11012 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11013 p += 4;
11014 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11015 p += 4;
11016 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11017 p += 4;
11018 bfd_put_32 (htab->glink->owner, BCTR, p);
11019 p += 4;
11020 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11021 {
11022 bfd_put_32 (htab->glink->owner, NOP, p);
11023 p += 4;
11024 }
11025
11026 /* Build the .glink lazy link call stubs. */
11027 indx = 0;
11028 while (p < htab->glink->contents + htab->glink->size)
11029 {
11030 if (indx < 0x8000)
11031 {
11032 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11033 p += 4;
11034 }
11035 else
11036 {
11037 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11038 p += 4;
11039 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11040 p += 4;
11041 }
11042 bfd_put_32 (htab->glink->owner,
11043 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11044 indx++;
11045 p += 4;
11046 }
11047 htab->glink->rawsize = p - htab->glink->contents;
11048 }
11049
11050 if (htab->brlt->size != 0)
11051 {
11052 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11053 htab->brlt->size);
11054 if (htab->brlt->contents == NULL)
11055 return FALSE;
11056 }
11057 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11058 {
11059 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11060 htab->relbrlt->size);
11061 if (htab->relbrlt->contents == NULL)
11062 return FALSE;
11063 }
11064
11065 /* Build the stubs as directed by the stub hash table. */
11066 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11067
11068 if (htab->relbrlt != NULL)
11069 htab->relbrlt->reloc_count = 0;
11070
11071 for (stub_sec = htab->stub_bfd->sections;
11072 stub_sec != NULL;
11073 stub_sec = stub_sec->next)
11074 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11075 {
11076 stub_sec_count += 1;
11077 if (stub_sec->rawsize != stub_sec->size)
11078 break;
11079 }
11080
11081 if (stub_sec != NULL
11082 || htab->glink->rawsize != htab->glink->size)
11083 {
11084 htab->stub_error = TRUE;
11085 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11086 }
11087
11088 if (htab->stub_error)
11089 return FALSE;
11090
11091 if (stats != NULL)
11092 {
11093 *stats = bfd_malloc (500);
11094 if (*stats == NULL)
11095 return FALSE;
11096
11097 sprintf (*stats, _("linker stubs in %u group%s\n"
11098 " branch %lu\n"
11099 " toc adjust %lu\n"
11100 " long branch %lu\n"
11101 " long toc adj %lu\n"
11102 " plt call %lu"),
11103 stub_sec_count,
11104 stub_sec_count == 1 ? "" : "s",
11105 htab->stub_count[ppc_stub_long_branch - 1],
11106 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11107 htab->stub_count[ppc_stub_plt_branch - 1],
11108 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11109 htab->stub_count[ppc_stub_plt_call - 1]);
11110 }
11111 return TRUE;
11112 }
11113
11114 /* This function undoes the changes made by add_symbol_adjust. */
11115
11116 static bfd_boolean
11117 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11118 {
11119 struct ppc_link_hash_entry *eh;
11120
11121 if (h->root.type == bfd_link_hash_indirect)
11122 return TRUE;
11123
11124 if (h->root.type == bfd_link_hash_warning)
11125 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11126
11127 eh = (struct ppc_link_hash_entry *) h;
11128 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11129 return TRUE;
11130
11131 eh->elf.root.type = bfd_link_hash_undefined;
11132 return TRUE;
11133 }
11134
11135 void
11136 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11137 {
11138 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11139
11140 if (htab != NULL)
11141 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11142 }
11143
11144 /* What to do when ld finds relocations against symbols defined in
11145 discarded sections. */
11146
11147 static unsigned int
11148 ppc64_elf_action_discarded (asection *sec)
11149 {
11150 if (strcmp (".opd", sec->name) == 0)
11151 return 0;
11152
11153 if (strcmp (".toc", sec->name) == 0)
11154 return 0;
11155
11156 if (strcmp (".toc1", sec->name) == 0)
11157 return 0;
11158
11159 return _bfd_elf_default_action_discarded (sec);
11160 }
11161
11162 /* The RELOCATE_SECTION function is called by the ELF backend linker
11163 to handle the relocations for a section.
11164
11165 The relocs are always passed as Rela structures; if the section
11166 actually uses Rel structures, the r_addend field will always be
11167 zero.
11168
11169 This function is responsible for adjust the section contents as
11170 necessary, and (if using Rela relocs and generating a
11171 relocatable output file) adjusting the reloc addend as
11172 necessary.
11173
11174 This function does not have to worry about setting the reloc
11175 address or the reloc symbol index.
11176
11177 LOCAL_SYMS is a pointer to the swapped in local symbols.
11178
11179 LOCAL_SECTIONS is an array giving the section in the input file
11180 corresponding to the st_shndx field of each local symbol.
11181
11182 The global hash table entry for the global symbols can be found
11183 via elf_sym_hashes (input_bfd).
11184
11185 When generating relocatable output, this function must handle
11186 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11187 going to be the section symbol corresponding to the output
11188 section, which means that the addend must be adjusted
11189 accordingly. */
11190
11191 static bfd_boolean
11192 ppc64_elf_relocate_section (bfd *output_bfd,
11193 struct bfd_link_info *info,
11194 bfd *input_bfd,
11195 asection *input_section,
11196 bfd_byte *contents,
11197 Elf_Internal_Rela *relocs,
11198 Elf_Internal_Sym *local_syms,
11199 asection **local_sections)
11200 {
11201 struct ppc_link_hash_table *htab;
11202 Elf_Internal_Shdr *symtab_hdr;
11203 struct elf_link_hash_entry **sym_hashes;
11204 Elf_Internal_Rela *rel;
11205 Elf_Internal_Rela *relend;
11206 Elf_Internal_Rela outrel;
11207 bfd_byte *loc;
11208 struct got_entry **local_got_ents;
11209 bfd_vma TOCstart;
11210 bfd_boolean ret = TRUE;
11211 bfd_boolean is_opd;
11212 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11213 bfd_boolean is_power4 = FALSE;
11214 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11215
11216 /* Initialize howto table if needed. */
11217 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11218 ppc_howto_init ();
11219
11220 htab = ppc_hash_table (info);
11221 if (htab == NULL)
11222 return FALSE;
11223
11224 /* Don't relocate stub sections. */
11225 if (input_section->owner == htab->stub_bfd)
11226 return TRUE;
11227
11228 BFD_ASSERT (is_ppc64_elf (input_bfd));
11229
11230 local_got_ents = elf_local_got_ents (input_bfd);
11231 TOCstart = elf_gp (output_bfd);
11232 symtab_hdr = &elf_symtab_hdr (input_bfd);
11233 sym_hashes = elf_sym_hashes (input_bfd);
11234 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11235
11236 rel = relocs;
11237 relend = relocs + input_section->reloc_count;
11238 for (; rel < relend; rel++)
11239 {
11240 enum elf_ppc64_reloc_type r_type;
11241 bfd_vma addend, orig_addend;
11242 bfd_reloc_status_type r;
11243 Elf_Internal_Sym *sym;
11244 asection *sec;
11245 struct elf_link_hash_entry *h_elf;
11246 struct ppc_link_hash_entry *h;
11247 struct ppc_link_hash_entry *fdh;
11248 const char *sym_name;
11249 unsigned long r_symndx, toc_symndx;
11250 bfd_vma toc_addend;
11251 char tls_mask, tls_gd, tls_type;
11252 char sym_type;
11253 bfd_vma relocation;
11254 bfd_boolean unresolved_reloc;
11255 bfd_boolean warned;
11256 unsigned long insn, mask;
11257 struct ppc_stub_hash_entry *stub_entry;
11258 bfd_vma max_br_offset;
11259 bfd_vma from;
11260
11261 r_type = ELF64_R_TYPE (rel->r_info);
11262 r_symndx = ELF64_R_SYM (rel->r_info);
11263
11264 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11265 symbol of the previous ADDR64 reloc. The symbol gives us the
11266 proper TOC base to use. */
11267 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11268 && rel != relocs
11269 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11270 && is_opd)
11271 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11272
11273 sym = NULL;
11274 sec = NULL;
11275 h_elf = NULL;
11276 sym_name = NULL;
11277 unresolved_reloc = FALSE;
11278 warned = FALSE;
11279 orig_addend = rel->r_addend;
11280
11281 if (r_symndx < symtab_hdr->sh_info)
11282 {
11283 /* It's a local symbol. */
11284 struct _opd_sec_data *opd;
11285
11286 sym = local_syms + r_symndx;
11287 sec = local_sections[r_symndx];
11288 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11289 sym_type = ELF64_ST_TYPE (sym->st_info);
11290 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11291 opd = get_opd_info (sec);
11292 if (opd != NULL && opd->adjust != NULL)
11293 {
11294 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11295 if (adjust == -1)
11296 relocation = 0;
11297 else
11298 {
11299 /* If this is a relocation against the opd section sym
11300 and we have edited .opd, adjust the reloc addend so
11301 that ld -r and ld --emit-relocs output is correct.
11302 If it is a reloc against some other .opd symbol,
11303 then the symbol value will be adjusted later. */
11304 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11305 rel->r_addend += adjust;
11306 else
11307 relocation += adjust;
11308 }
11309 }
11310 }
11311 else
11312 {
11313 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11314 r_symndx, symtab_hdr, sym_hashes,
11315 h_elf, sec, relocation,
11316 unresolved_reloc, warned);
11317 sym_name = h_elf->root.root.string;
11318 sym_type = h_elf->type;
11319 }
11320 h = (struct ppc_link_hash_entry *) h_elf;
11321
11322 if (sec != NULL && elf_discarded_section (sec))
11323 {
11324 /* For relocs against symbols from removed linkonce sections,
11325 or sections discarded by a linker script, we just want the
11326 section contents zeroed. Avoid any special processing. */
11327 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11328 contents + rel->r_offset);
11329 rel->r_info = 0;
11330 rel->r_addend = 0;
11331 continue;
11332 }
11333
11334 if (info->relocatable)
11335 continue;
11336
11337 /* TLS optimizations. Replace instruction sequences and relocs
11338 based on information we collected in tls_optimize. We edit
11339 RELOCS so that --emit-relocs will output something sensible
11340 for the final instruction stream. */
11341 tls_mask = 0;
11342 tls_gd = 0;
11343 toc_symndx = 0;
11344 if (h != NULL)
11345 tls_mask = h->tls_mask;
11346 else if (local_got_ents != NULL)
11347 {
11348 struct plt_entry **local_plt = (struct plt_entry **)
11349 (local_got_ents + symtab_hdr->sh_info);
11350 char *lgot_masks = (char *)
11351 (local_plt + symtab_hdr->sh_info);
11352 tls_mask = lgot_masks[r_symndx];
11353 }
11354 if (tls_mask == 0
11355 && (r_type == R_PPC64_TLS
11356 || r_type == R_PPC64_TLSGD
11357 || r_type == R_PPC64_TLSLD))
11358 {
11359 /* Check for toc tls entries. */
11360 char *toc_tls;
11361
11362 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11363 &local_syms, rel, input_bfd))
11364 return FALSE;
11365
11366 if (toc_tls)
11367 tls_mask = *toc_tls;
11368 }
11369
11370 /* Check that tls relocs are used with tls syms, and non-tls
11371 relocs are used with non-tls syms. */
11372 if (r_symndx != 0
11373 && r_type != R_PPC64_NONE
11374 && (h == NULL
11375 || h->elf.root.type == bfd_link_hash_defined
11376 || h->elf.root.type == bfd_link_hash_defweak)
11377 && (IS_PPC64_TLS_RELOC (r_type)
11378 != (sym_type == STT_TLS
11379 || (sym_type == STT_SECTION
11380 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11381 {
11382 if (tls_mask != 0
11383 && (r_type == R_PPC64_TLS
11384 || r_type == R_PPC64_TLSGD
11385 || r_type == R_PPC64_TLSLD))
11386 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11387 ;
11388 else
11389 (*_bfd_error_handler)
11390 (!IS_PPC64_TLS_RELOC (r_type)
11391 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11392 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11393 input_bfd,
11394 input_section,
11395 (long) rel->r_offset,
11396 ppc64_elf_howto_table[r_type]->name,
11397 sym_name);
11398 }
11399
11400 /* Ensure reloc mapping code below stays sane. */
11401 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11402 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11403 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11404 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11405 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11406 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11407 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11408 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11409 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11410 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11411 abort ();
11412
11413 switch (r_type)
11414 {
11415 default:
11416 break;
11417
11418 case R_PPC64_TOC16:
11419 case R_PPC64_TOC16_LO:
11420 case R_PPC64_TOC16_DS:
11421 case R_PPC64_TOC16_LO_DS:
11422 {
11423 /* Check for toc tls entries. */
11424 char *toc_tls;
11425 int retval;
11426
11427 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11428 &local_syms, rel, input_bfd);
11429 if (retval == 0)
11430 return FALSE;
11431
11432 if (toc_tls)
11433 {
11434 tls_mask = *toc_tls;
11435 if (r_type == R_PPC64_TOC16_DS
11436 || r_type == R_PPC64_TOC16_LO_DS)
11437 {
11438 if (tls_mask != 0
11439 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11440 goto toctprel;
11441 }
11442 else
11443 {
11444 /* If we found a GD reloc pair, then we might be
11445 doing a GD->IE transition. */
11446 if (retval == 2)
11447 {
11448 tls_gd = TLS_TPRELGD;
11449 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11450 goto tls_ldgd_opt;
11451 }
11452 else if (retval == 3)
11453 {
11454 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11455 goto tls_ldgd_opt;
11456 }
11457 }
11458 }
11459 }
11460 break;
11461
11462 case R_PPC64_GOT_TPREL16_DS:
11463 case R_PPC64_GOT_TPREL16_LO_DS:
11464 if (tls_mask != 0
11465 && (tls_mask & TLS_TPREL) == 0)
11466 {
11467 toctprel:
11468 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11469 insn &= 31 << 21;
11470 insn |= 0x3c0d0000; /* addis 0,13,0 */
11471 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11472 r_type = R_PPC64_TPREL16_HA;
11473 if (toc_symndx != 0)
11474 {
11475 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11476 rel->r_addend = toc_addend;
11477 /* We changed the symbol. Start over in order to
11478 get h, sym, sec etc. right. */
11479 rel--;
11480 continue;
11481 }
11482 else
11483 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11484 }
11485 break;
11486
11487 case R_PPC64_TLS:
11488 if (tls_mask != 0
11489 && (tls_mask & TLS_TPREL) == 0)
11490 {
11491 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11492 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11493 if (insn == 0)
11494 abort ();
11495 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11496 /* Was PPC64_TLS which sits on insn boundary, now
11497 PPC64_TPREL16_LO which is at low-order half-word. */
11498 rel->r_offset += d_offset;
11499 r_type = R_PPC64_TPREL16_LO;
11500 if (toc_symndx != 0)
11501 {
11502 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11503 rel->r_addend = toc_addend;
11504 /* We changed the symbol. Start over in order to
11505 get h, sym, sec etc. right. */
11506 rel--;
11507 continue;
11508 }
11509 else
11510 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11511 }
11512 break;
11513
11514 case R_PPC64_GOT_TLSGD16_HI:
11515 case R_PPC64_GOT_TLSGD16_HA:
11516 tls_gd = TLS_TPRELGD;
11517 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11518 goto tls_gdld_hi;
11519 break;
11520
11521 case R_PPC64_GOT_TLSLD16_HI:
11522 case R_PPC64_GOT_TLSLD16_HA:
11523 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11524 {
11525 tls_gdld_hi:
11526 if ((tls_mask & tls_gd) != 0)
11527 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11528 + R_PPC64_GOT_TPREL16_DS);
11529 else
11530 {
11531 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11532 rel->r_offset -= d_offset;
11533 r_type = R_PPC64_NONE;
11534 }
11535 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11536 }
11537 break;
11538
11539 case R_PPC64_GOT_TLSGD16:
11540 case R_PPC64_GOT_TLSGD16_LO:
11541 tls_gd = TLS_TPRELGD;
11542 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11543 goto tls_ldgd_opt;
11544 break;
11545
11546 case R_PPC64_GOT_TLSLD16:
11547 case R_PPC64_GOT_TLSLD16_LO:
11548 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11549 {
11550 unsigned int insn1, insn2, insn3;
11551 bfd_vma offset;
11552
11553 tls_ldgd_opt:
11554 offset = (bfd_vma) -1;
11555 /* If not using the newer R_PPC64_TLSGD/LD to mark
11556 __tls_get_addr calls, we must trust that the call
11557 stays with its arg setup insns, ie. that the next
11558 reloc is the __tls_get_addr call associated with
11559 the current reloc. Edit both insns. */
11560 if (input_section->has_tls_get_addr_call
11561 && rel + 1 < relend
11562 && branch_reloc_hash_match (input_bfd, rel + 1,
11563 htab->tls_get_addr,
11564 htab->tls_get_addr_fd))
11565 offset = rel[1].r_offset;
11566 if ((tls_mask & tls_gd) != 0)
11567 {
11568 /* IE */
11569 insn1 = bfd_get_32 (output_bfd,
11570 contents + rel->r_offset - d_offset);
11571 insn1 &= (1 << 26) - (1 << 2);
11572 insn1 |= 58 << 26; /* ld */
11573 insn2 = 0x7c636a14; /* add 3,3,13 */
11574 if (offset != (bfd_vma) -1)
11575 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11576 if ((tls_mask & TLS_EXPLICIT) == 0)
11577 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11578 + R_PPC64_GOT_TPREL16_DS);
11579 else
11580 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11581 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11582 }
11583 else
11584 {
11585 /* LE */
11586 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11587 insn2 = 0x38630000; /* addi 3,3,0 */
11588 if (tls_gd == 0)
11589 {
11590 /* Was an LD reloc. */
11591 if (toc_symndx)
11592 sec = local_sections[toc_symndx];
11593 for (r_symndx = 0;
11594 r_symndx < symtab_hdr->sh_info;
11595 r_symndx++)
11596 if (local_sections[r_symndx] == sec)
11597 break;
11598 if (r_symndx >= symtab_hdr->sh_info)
11599 r_symndx = 0;
11600 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11601 if (r_symndx != 0)
11602 rel->r_addend -= (local_syms[r_symndx].st_value
11603 + sec->output_offset
11604 + sec->output_section->vma);
11605 }
11606 else if (toc_symndx != 0)
11607 {
11608 r_symndx = toc_symndx;
11609 rel->r_addend = toc_addend;
11610 }
11611 r_type = R_PPC64_TPREL16_HA;
11612 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11613 if (offset != (bfd_vma) -1)
11614 {
11615 rel[1].r_info = ELF64_R_INFO (r_symndx,
11616 R_PPC64_TPREL16_LO);
11617 rel[1].r_offset = offset + d_offset;
11618 rel[1].r_addend = rel->r_addend;
11619 }
11620 }
11621 bfd_put_32 (output_bfd, insn1,
11622 contents + rel->r_offset - d_offset);
11623 if (offset != (bfd_vma) -1)
11624 {
11625 insn3 = bfd_get_32 (output_bfd,
11626 contents + offset + 4);
11627 if (insn3 == NOP
11628 || insn3 == CROR_151515 || insn3 == CROR_313131)
11629 {
11630 rel[1].r_offset += 4;
11631 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11632 insn2 = NOP;
11633 }
11634 bfd_put_32 (output_bfd, insn2, contents + offset);
11635 }
11636 if ((tls_mask & tls_gd) == 0
11637 && (tls_gd == 0 || toc_symndx != 0))
11638 {
11639 /* We changed the symbol. Start over in order
11640 to get h, sym, sec etc. right. */
11641 rel--;
11642 continue;
11643 }
11644 }
11645 break;
11646
11647 case R_PPC64_TLSGD:
11648 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11649 {
11650 unsigned int insn2, insn3;
11651 bfd_vma offset = rel->r_offset;
11652
11653 if ((tls_mask & TLS_TPRELGD) != 0)
11654 {
11655 /* IE */
11656 r_type = R_PPC64_NONE;
11657 insn2 = 0x7c636a14; /* add 3,3,13 */
11658 }
11659 else
11660 {
11661 /* LE */
11662 if (toc_symndx != 0)
11663 {
11664 r_symndx = toc_symndx;
11665 rel->r_addend = toc_addend;
11666 }
11667 r_type = R_PPC64_TPREL16_LO;
11668 rel->r_offset = offset + d_offset;
11669 insn2 = 0x38630000; /* addi 3,3,0 */
11670 }
11671 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11672 /* Zap the reloc on the _tls_get_addr call too. */
11673 BFD_ASSERT (offset == rel[1].r_offset);
11674 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11675 insn3 = bfd_get_32 (output_bfd,
11676 contents + offset + 4);
11677 if (insn3 == NOP
11678 || insn3 == CROR_151515 || insn3 == CROR_313131)
11679 {
11680 rel->r_offset += 4;
11681 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11682 insn2 = NOP;
11683 }
11684 bfd_put_32 (output_bfd, insn2, contents + offset);
11685 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11686 {
11687 rel--;
11688 continue;
11689 }
11690 }
11691 break;
11692
11693 case R_PPC64_TLSLD:
11694 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11695 {
11696 unsigned int insn2, insn3;
11697 bfd_vma offset = rel->r_offset;
11698
11699 if (toc_symndx)
11700 sec = local_sections[toc_symndx];
11701 for (r_symndx = 0;
11702 r_symndx < symtab_hdr->sh_info;
11703 r_symndx++)
11704 if (local_sections[r_symndx] == sec)
11705 break;
11706 if (r_symndx >= symtab_hdr->sh_info)
11707 r_symndx = 0;
11708 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11709 if (r_symndx != 0)
11710 rel->r_addend -= (local_syms[r_symndx].st_value
11711 + sec->output_offset
11712 + sec->output_section->vma);
11713
11714 r_type = R_PPC64_TPREL16_LO;
11715 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11716 rel->r_offset = offset + d_offset;
11717 /* Zap the reloc on the _tls_get_addr call too. */
11718 BFD_ASSERT (offset == rel[1].r_offset);
11719 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11720 insn2 = 0x38630000; /* addi 3,3,0 */
11721 insn3 = bfd_get_32 (output_bfd,
11722 contents + offset + 4);
11723 if (insn3 == NOP
11724 || insn3 == CROR_151515 || insn3 == CROR_313131)
11725 {
11726 rel->r_offset += 4;
11727 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11728 insn2 = NOP;
11729 }
11730 bfd_put_32 (output_bfd, insn2, contents + offset);
11731 rel--;
11732 continue;
11733 }
11734 break;
11735
11736 case R_PPC64_DTPMOD64:
11737 if (rel + 1 < relend
11738 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11739 && rel[1].r_offset == rel->r_offset + 8)
11740 {
11741 if ((tls_mask & TLS_GD) == 0)
11742 {
11743 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11744 if ((tls_mask & TLS_TPRELGD) != 0)
11745 r_type = R_PPC64_TPREL64;
11746 else
11747 {
11748 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11749 r_type = R_PPC64_NONE;
11750 }
11751 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11752 }
11753 }
11754 else
11755 {
11756 if ((tls_mask & TLS_LD) == 0)
11757 {
11758 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11759 r_type = R_PPC64_NONE;
11760 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11761 }
11762 }
11763 break;
11764
11765 case R_PPC64_TPREL64:
11766 if ((tls_mask & TLS_TPREL) == 0)
11767 {
11768 r_type = R_PPC64_NONE;
11769 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11770 }
11771 break;
11772 }
11773
11774 /* Handle other relocations that tweak non-addend part of insn. */
11775 insn = 0;
11776 max_br_offset = 1 << 25;
11777 addend = rel->r_addend;
11778 switch (r_type)
11779 {
11780 default:
11781 break;
11782
11783 /* Branch taken prediction relocations. */
11784 case R_PPC64_ADDR14_BRTAKEN:
11785 case R_PPC64_REL14_BRTAKEN:
11786 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11787 /* Fall thru. */
11788
11789 /* Branch not taken prediction relocations. */
11790 case R_PPC64_ADDR14_BRNTAKEN:
11791 case R_PPC64_REL14_BRNTAKEN:
11792 insn |= bfd_get_32 (output_bfd,
11793 contents + rel->r_offset) & ~(0x01 << 21);
11794 /* Fall thru. */
11795
11796 case R_PPC64_REL14:
11797 max_br_offset = 1 << 15;
11798 /* Fall thru. */
11799
11800 case R_PPC64_REL24:
11801 /* Calls to functions with a different TOC, such as calls to
11802 shared objects, need to alter the TOC pointer. This is
11803 done using a linkage stub. A REL24 branching to these
11804 linkage stubs needs to be followed by a nop, as the nop
11805 will be replaced with an instruction to restore the TOC
11806 base pointer. */
11807 stub_entry = NULL;
11808 fdh = h;
11809 if (h != NULL
11810 && h->oh != NULL
11811 && h->oh->is_func_descriptor)
11812 fdh = ppc_follow_link (h->oh);
11813 if (((fdh != NULL
11814 && fdh->elf.plt.plist != NULL)
11815 || (sec != NULL
11816 && sec->output_section != NULL
11817 && sec->id <= htab->top_id
11818 && (htab->stub_group[sec->id].toc_off
11819 != htab->stub_group[input_section->id].toc_off))
11820 || (h == NULL
11821 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11822 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11823 rel, htab)) != NULL
11824 && (stub_entry->stub_type == ppc_stub_plt_call
11825 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11826 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11827 {
11828 bfd_boolean can_plt_call = FALSE;
11829
11830 if (rel->r_offset + 8 <= input_section->size)
11831 {
11832 unsigned long nop;
11833 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11834 if (nop == NOP
11835 || nop == CROR_151515 || nop == CROR_313131)
11836 {
11837 if (h != NULL
11838 && (h == htab->tls_get_addr_fd
11839 || h == htab->tls_get_addr)
11840 && !htab->no_tls_get_addr_opt)
11841 {
11842 /* Special stub used, leave nop alone. */
11843 }
11844 else
11845 bfd_put_32 (input_bfd, LD_R2_40R1,
11846 contents + rel->r_offset + 4);
11847 can_plt_call = TRUE;
11848 }
11849 }
11850
11851 if (!can_plt_call)
11852 {
11853 if (stub_entry->stub_type == ppc_stub_plt_call)
11854 {
11855 /* If this is a plain branch rather than a branch
11856 and link, don't require a nop. However, don't
11857 allow tail calls in a shared library as they
11858 will result in r2 being corrupted. */
11859 unsigned long br;
11860 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11861 if (info->executable && (br & 1) == 0)
11862 can_plt_call = TRUE;
11863 else
11864 stub_entry = NULL;
11865 }
11866 else if (h != NULL
11867 && strcmp (h->elf.root.root.string,
11868 ".__libc_start_main") == 0)
11869 {
11870 /* Allow crt1 branch to go via a toc adjusting stub. */
11871 can_plt_call = TRUE;
11872 }
11873 else
11874 {
11875 if (strcmp (input_section->output_section->name,
11876 ".init") == 0
11877 || strcmp (input_section->output_section->name,
11878 ".fini") == 0)
11879 (*_bfd_error_handler)
11880 (_("%B(%A+0x%lx): automatic multiple TOCs "
11881 "not supported using your crt files; "
11882 "recompile with -mminimal-toc or upgrade gcc"),
11883 input_bfd,
11884 input_section,
11885 (long) rel->r_offset);
11886 else
11887 (*_bfd_error_handler)
11888 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11889 "does not allow automatic multiple TOCs; "
11890 "recompile with -mminimal-toc or "
11891 "-fno-optimize-sibling-calls, "
11892 "or make `%s' extern"),
11893 input_bfd,
11894 input_section,
11895 (long) rel->r_offset,
11896 sym_name,
11897 sym_name);
11898 bfd_set_error (bfd_error_bad_value);
11899 ret = FALSE;
11900 }
11901 }
11902
11903 if (can_plt_call
11904 && stub_entry->stub_type == ppc_stub_plt_call)
11905 unresolved_reloc = FALSE;
11906 }
11907
11908 if (stub_entry == NULL
11909 && get_opd_info (sec) != NULL)
11910 {
11911 /* The branch destination is the value of the opd entry. */
11912 bfd_vma off = (relocation + addend
11913 - sec->output_section->vma
11914 - sec->output_offset);
11915 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11916 if (dest != (bfd_vma) -1)
11917 {
11918 relocation = dest;
11919 addend = 0;
11920 }
11921 }
11922
11923 /* If the branch is out of reach we ought to have a long
11924 branch stub. */
11925 from = (rel->r_offset
11926 + input_section->output_offset
11927 + input_section->output_section->vma);
11928
11929 if (stub_entry == NULL
11930 && (relocation + addend - from + max_br_offset
11931 >= 2 * max_br_offset)
11932 && r_type != R_PPC64_ADDR14_BRTAKEN
11933 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11934 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11935 htab);
11936
11937 if (stub_entry != NULL)
11938 {
11939 /* Munge up the value and addend so that we call the stub
11940 rather than the procedure directly. */
11941 relocation = (stub_entry->stub_offset
11942 + stub_entry->stub_sec->output_offset
11943 + stub_entry->stub_sec->output_section->vma);
11944 addend = 0;
11945 }
11946
11947 if (insn != 0)
11948 {
11949 if (is_power4)
11950 {
11951 /* Set 'a' bit. This is 0b00010 in BO field for branch
11952 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11953 for branch on CTR insns (BO == 1a00t or 1a01t). */
11954 if ((insn & (0x14 << 21)) == (0x04 << 21))
11955 insn |= 0x02 << 21;
11956 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11957 insn |= 0x08 << 21;
11958 else
11959 break;
11960 }
11961 else
11962 {
11963 /* Invert 'y' bit if not the default. */
11964 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11965 insn ^= 0x01 << 21;
11966 }
11967
11968 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11969 }
11970
11971 /* NOP out calls to undefined weak functions.
11972 We can thus call a weak function without first
11973 checking whether the function is defined. */
11974 else if (h != NULL
11975 && h->elf.root.type == bfd_link_hash_undefweak
11976 && h->elf.dynindx == -1
11977 && r_type == R_PPC64_REL24
11978 && relocation == 0
11979 && addend == 0)
11980 {
11981 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11982 continue;
11983 }
11984 break;
11985 }
11986
11987 /* Set `addend'. */
11988 tls_type = 0;
11989 switch (r_type)
11990 {
11991 default:
11992 (*_bfd_error_handler)
11993 (_("%B: unknown relocation type %d for symbol %s"),
11994 input_bfd, (int) r_type, sym_name);
11995
11996 bfd_set_error (bfd_error_bad_value);
11997 ret = FALSE;
11998 continue;
11999
12000 case R_PPC64_NONE:
12001 case R_PPC64_TLS:
12002 case R_PPC64_TLSGD:
12003 case R_PPC64_TLSLD:
12004 case R_PPC64_GNU_VTINHERIT:
12005 case R_PPC64_GNU_VTENTRY:
12006 continue;
12007
12008 /* GOT16 relocations. Like an ADDR16 using the symbol's
12009 address in the GOT as relocation value instead of the
12010 symbol's value itself. Also, create a GOT entry for the
12011 symbol and put the symbol value there. */
12012 case R_PPC64_GOT_TLSGD16:
12013 case R_PPC64_GOT_TLSGD16_LO:
12014 case R_PPC64_GOT_TLSGD16_HI:
12015 case R_PPC64_GOT_TLSGD16_HA:
12016 tls_type = TLS_TLS | TLS_GD;
12017 goto dogot;
12018
12019 case R_PPC64_GOT_TLSLD16:
12020 case R_PPC64_GOT_TLSLD16_LO:
12021 case R_PPC64_GOT_TLSLD16_HI:
12022 case R_PPC64_GOT_TLSLD16_HA:
12023 tls_type = TLS_TLS | TLS_LD;
12024 goto dogot;
12025
12026 case R_PPC64_GOT_TPREL16_DS:
12027 case R_PPC64_GOT_TPREL16_LO_DS:
12028 case R_PPC64_GOT_TPREL16_HI:
12029 case R_PPC64_GOT_TPREL16_HA:
12030 tls_type = TLS_TLS | TLS_TPREL;
12031 goto dogot;
12032
12033 case R_PPC64_GOT_DTPREL16_DS:
12034 case R_PPC64_GOT_DTPREL16_LO_DS:
12035 case R_PPC64_GOT_DTPREL16_HI:
12036 case R_PPC64_GOT_DTPREL16_HA:
12037 tls_type = TLS_TLS | TLS_DTPREL;
12038 goto dogot;
12039
12040 case R_PPC64_GOT16:
12041 case R_PPC64_GOT16_LO:
12042 case R_PPC64_GOT16_HI:
12043 case R_PPC64_GOT16_HA:
12044 case R_PPC64_GOT16_DS:
12045 case R_PPC64_GOT16_LO_DS:
12046 dogot:
12047 {
12048 /* Relocation is to the entry for this symbol in the global
12049 offset table. */
12050 asection *got;
12051 bfd_vma *offp;
12052 bfd_vma off;
12053 unsigned long indx = 0;
12054 struct got_entry *ent;
12055
12056 if (tls_type == (TLS_TLS | TLS_LD)
12057 && (h == NULL
12058 || !h->elf.def_dynamic))
12059 ent = ppc64_tlsld_got (input_bfd);
12060 else
12061 {
12062
12063 if (h != NULL)
12064 {
12065 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12066 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12067 &h->elf)
12068 || (info->shared
12069 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12070 /* This is actually a static link, or it is a
12071 -Bsymbolic link and the symbol is defined
12072 locally, or the symbol was forced to be local
12073 because of a version file. */
12074 ;
12075 else
12076 {
12077 indx = h->elf.dynindx;
12078 unresolved_reloc = FALSE;
12079 }
12080 ent = h->elf.got.glist;
12081 }
12082 else
12083 {
12084 if (local_got_ents == NULL)
12085 abort ();
12086 ent = local_got_ents[r_symndx];
12087 }
12088
12089 for (; ent != NULL; ent = ent->next)
12090 if (ent->addend == orig_addend
12091 && ent->owner == input_bfd
12092 && ent->tls_type == tls_type)
12093 break;
12094 }
12095
12096 if (ent == NULL)
12097 abort ();
12098 if (ent->is_indirect)
12099 ent = ent->got.ent;
12100 offp = &ent->got.offset;
12101 got = ppc64_elf_tdata (ent->owner)->got;
12102 if (got == NULL)
12103 abort ();
12104
12105 /* The offset must always be a multiple of 8. We use the
12106 least significant bit to record whether we have already
12107 processed this entry. */
12108 off = *offp;
12109 if ((off & 1) != 0)
12110 off &= ~1;
12111 else
12112 {
12113 /* Generate relocs for the dynamic linker, except in
12114 the case of TLSLD where we'll use one entry per
12115 module. */
12116 asection *relgot;
12117 bfd_boolean ifunc;
12118
12119 *offp = off | 1;
12120 relgot = NULL;
12121 ifunc = (h != NULL
12122 ? h->elf.type == STT_GNU_IFUNC
12123 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12124 if ((info->shared || indx != 0)
12125 && (h == NULL
12126 || (tls_type == (TLS_TLS | TLS_LD)
12127 && !h->elf.def_dynamic)
12128 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12129 || h->elf.root.type != bfd_link_hash_undefweak))
12130 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12131 else if (ifunc)
12132 relgot = htab->reliplt;
12133 if (relgot != NULL)
12134 {
12135 outrel.r_offset = (got->output_section->vma
12136 + got->output_offset
12137 + off);
12138 outrel.r_addend = addend;
12139 if (tls_type & (TLS_LD | TLS_GD))
12140 {
12141 outrel.r_addend = 0;
12142 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12143 if (tls_type == (TLS_TLS | TLS_GD))
12144 {
12145 loc = relgot->contents;
12146 loc += (relgot->reloc_count++
12147 * sizeof (Elf64_External_Rela));
12148 bfd_elf64_swap_reloca_out (output_bfd,
12149 &outrel, loc);
12150 outrel.r_offset += 8;
12151 outrel.r_addend = addend;
12152 outrel.r_info
12153 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12154 }
12155 }
12156 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12157 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12158 else if (tls_type == (TLS_TLS | TLS_TPREL))
12159 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12160 else if (indx != 0)
12161 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12162 else
12163 {
12164 if (ifunc)
12165 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12166 else
12167 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12168
12169 /* Write the .got section contents for the sake
12170 of prelink. */
12171 loc = got->contents + off;
12172 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12173 loc);
12174 }
12175
12176 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12177 {
12178 outrel.r_addend += relocation;
12179 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12180 outrel.r_addend -= htab->elf.tls_sec->vma;
12181 }
12182 loc = relgot->contents;
12183 loc += (relgot->reloc_count++
12184 * sizeof (Elf64_External_Rela));
12185 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12186 }
12187
12188 /* Init the .got section contents here if we're not
12189 emitting a reloc. */
12190 else
12191 {
12192 relocation += addend;
12193 if (tls_type == (TLS_TLS | TLS_LD))
12194 relocation = 1;
12195 else if (tls_type != 0)
12196 {
12197 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12198 if (tls_type == (TLS_TLS | TLS_TPREL))
12199 relocation += DTP_OFFSET - TP_OFFSET;
12200
12201 if (tls_type == (TLS_TLS | TLS_GD))
12202 {
12203 bfd_put_64 (output_bfd, relocation,
12204 got->contents + off + 8);
12205 relocation = 1;
12206 }
12207 }
12208
12209 bfd_put_64 (output_bfd, relocation,
12210 got->contents + off);
12211 }
12212 }
12213
12214 if (off >= (bfd_vma) -2)
12215 abort ();
12216
12217 relocation = got->output_section->vma + got->output_offset + off;
12218 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12219 }
12220 break;
12221
12222 case R_PPC64_PLT16_HA:
12223 case R_PPC64_PLT16_HI:
12224 case R_PPC64_PLT16_LO:
12225 case R_PPC64_PLT32:
12226 case R_PPC64_PLT64:
12227 /* Relocation is to the entry for this symbol in the
12228 procedure linkage table. */
12229
12230 /* Resolve a PLT reloc against a local symbol directly,
12231 without using the procedure linkage table. */
12232 if (h == NULL)
12233 break;
12234
12235 /* It's possible that we didn't make a PLT entry for this
12236 symbol. This happens when statically linking PIC code,
12237 or when using -Bsymbolic. Go find a match if there is a
12238 PLT entry. */
12239 if (htab->plt != NULL)
12240 {
12241 struct plt_entry *ent;
12242 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12243 if (ent->addend == orig_addend
12244 && ent->plt.offset != (bfd_vma) -1)
12245 {
12246 relocation = (htab->plt->output_section->vma
12247 + htab->plt->output_offset
12248 + ent->plt.offset);
12249 unresolved_reloc = FALSE;
12250 }
12251 }
12252 break;
12253
12254 case R_PPC64_TOC:
12255 /* Relocation value is TOC base. */
12256 relocation = TOCstart;
12257 if (r_symndx == 0)
12258 relocation += htab->stub_group[input_section->id].toc_off;
12259 else if (unresolved_reloc)
12260 ;
12261 else if (sec != NULL && sec->id <= htab->top_id)
12262 relocation += htab->stub_group[sec->id].toc_off;
12263 else
12264 unresolved_reloc = TRUE;
12265 goto dodyn;
12266
12267 /* TOC16 relocs. We want the offset relative to the TOC base,
12268 which is the address of the start of the TOC plus 0x8000.
12269 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12270 in this order. */
12271 case R_PPC64_TOC16:
12272 case R_PPC64_TOC16_LO:
12273 case R_PPC64_TOC16_HI:
12274 case R_PPC64_TOC16_DS:
12275 case R_PPC64_TOC16_LO_DS:
12276 case R_PPC64_TOC16_HA:
12277 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12278 break;
12279
12280 /* Relocate against the beginning of the section. */
12281 case R_PPC64_SECTOFF:
12282 case R_PPC64_SECTOFF_LO:
12283 case R_PPC64_SECTOFF_HI:
12284 case R_PPC64_SECTOFF_DS:
12285 case R_PPC64_SECTOFF_LO_DS:
12286 case R_PPC64_SECTOFF_HA:
12287 if (sec != NULL)
12288 addend -= sec->output_section->vma;
12289 break;
12290
12291 case R_PPC64_REL16:
12292 case R_PPC64_REL16_LO:
12293 case R_PPC64_REL16_HI:
12294 case R_PPC64_REL16_HA:
12295 break;
12296
12297 case R_PPC64_REL14:
12298 case R_PPC64_REL14_BRNTAKEN:
12299 case R_PPC64_REL14_BRTAKEN:
12300 case R_PPC64_REL24:
12301 break;
12302
12303 case R_PPC64_TPREL16:
12304 case R_PPC64_TPREL16_LO:
12305 case R_PPC64_TPREL16_HI:
12306 case R_PPC64_TPREL16_HA:
12307 case R_PPC64_TPREL16_DS:
12308 case R_PPC64_TPREL16_LO_DS:
12309 case R_PPC64_TPREL16_HIGHER:
12310 case R_PPC64_TPREL16_HIGHERA:
12311 case R_PPC64_TPREL16_HIGHEST:
12312 case R_PPC64_TPREL16_HIGHESTA:
12313 if (h != NULL
12314 && h->elf.root.type == bfd_link_hash_undefweak
12315 && h->elf.dynindx == -1)
12316 {
12317 /* Make this relocation against an undefined weak symbol
12318 resolve to zero. This is really just a tweak, since
12319 code using weak externs ought to check that they are
12320 defined before using them. */
12321 bfd_byte *p = contents + rel->r_offset - d_offset;
12322
12323 insn = bfd_get_32 (output_bfd, p);
12324 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12325 if (insn != 0)
12326 bfd_put_32 (output_bfd, insn, p);
12327 break;
12328 }
12329 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12330 if (info->shared)
12331 /* The TPREL16 relocs shouldn't really be used in shared
12332 libs as they will result in DT_TEXTREL being set, but
12333 support them anyway. */
12334 goto dodyn;
12335 break;
12336
12337 case R_PPC64_DTPREL16:
12338 case R_PPC64_DTPREL16_LO:
12339 case R_PPC64_DTPREL16_HI:
12340 case R_PPC64_DTPREL16_HA:
12341 case R_PPC64_DTPREL16_DS:
12342 case R_PPC64_DTPREL16_LO_DS:
12343 case R_PPC64_DTPREL16_HIGHER:
12344 case R_PPC64_DTPREL16_HIGHERA:
12345 case R_PPC64_DTPREL16_HIGHEST:
12346 case R_PPC64_DTPREL16_HIGHESTA:
12347 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12348 break;
12349
12350 case R_PPC64_DTPMOD64:
12351 relocation = 1;
12352 addend = 0;
12353 goto dodyn;
12354
12355 case R_PPC64_TPREL64:
12356 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12357 goto dodyn;
12358
12359 case R_PPC64_DTPREL64:
12360 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12361 /* Fall thru */
12362
12363 /* Relocations that may need to be propagated if this is a
12364 dynamic object. */
12365 case R_PPC64_REL30:
12366 case R_PPC64_REL32:
12367 case R_PPC64_REL64:
12368 case R_PPC64_ADDR14:
12369 case R_PPC64_ADDR14_BRNTAKEN:
12370 case R_PPC64_ADDR14_BRTAKEN:
12371 case R_PPC64_ADDR16:
12372 case R_PPC64_ADDR16_DS:
12373 case R_PPC64_ADDR16_HA:
12374 case R_PPC64_ADDR16_HI:
12375 case R_PPC64_ADDR16_HIGHER:
12376 case R_PPC64_ADDR16_HIGHERA:
12377 case R_PPC64_ADDR16_HIGHEST:
12378 case R_PPC64_ADDR16_HIGHESTA:
12379 case R_PPC64_ADDR16_LO:
12380 case R_PPC64_ADDR16_LO_DS:
12381 case R_PPC64_ADDR24:
12382 case R_PPC64_ADDR32:
12383 case R_PPC64_ADDR64:
12384 case R_PPC64_UADDR16:
12385 case R_PPC64_UADDR32:
12386 case R_PPC64_UADDR64:
12387 dodyn:
12388 if ((input_section->flags & SEC_ALLOC) == 0)
12389 break;
12390
12391 if (NO_OPD_RELOCS && is_opd)
12392 break;
12393
12394 if ((info->shared
12395 && (h == NULL
12396 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12397 || h->elf.root.type != bfd_link_hash_undefweak)
12398 && (must_be_dyn_reloc (info, r_type)
12399 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12400 || (ELIMINATE_COPY_RELOCS
12401 && !info->shared
12402 && h != NULL
12403 && h->elf.dynindx != -1
12404 && !h->elf.non_got_ref
12405 && !h->elf.def_regular)
12406 || (!info->shared
12407 && (h != NULL
12408 ? h->elf.type == STT_GNU_IFUNC
12409 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12410 {
12411 bfd_boolean skip, relocate;
12412 asection *sreloc;
12413 bfd_vma out_off;
12414
12415 /* When generating a dynamic object, these relocations
12416 are copied into the output file to be resolved at run
12417 time. */
12418
12419 skip = FALSE;
12420 relocate = FALSE;
12421
12422 out_off = _bfd_elf_section_offset (output_bfd, info,
12423 input_section, rel->r_offset);
12424 if (out_off == (bfd_vma) -1)
12425 skip = TRUE;
12426 else if (out_off == (bfd_vma) -2)
12427 skip = TRUE, relocate = TRUE;
12428 out_off += (input_section->output_section->vma
12429 + input_section->output_offset);
12430 outrel.r_offset = out_off;
12431 outrel.r_addend = rel->r_addend;
12432
12433 /* Optimize unaligned reloc use. */
12434 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12435 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12436 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12437 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12438 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12439 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12440 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12441 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12442 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12443
12444 if (skip)
12445 memset (&outrel, 0, sizeof outrel);
12446 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12447 && !is_opd
12448 && r_type != R_PPC64_TOC)
12449 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12450 else
12451 {
12452 /* This symbol is local, or marked to become local,
12453 or this is an opd section reloc which must point
12454 at a local function. */
12455 outrel.r_addend += relocation;
12456 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12457 {
12458 if (is_opd && h != NULL)
12459 {
12460 /* Lie about opd entries. This case occurs
12461 when building shared libraries and we
12462 reference a function in another shared
12463 lib. The same thing happens for a weak
12464 definition in an application that's
12465 overridden by a strong definition in a
12466 shared lib. (I believe this is a generic
12467 bug in binutils handling of weak syms.)
12468 In these cases we won't use the opd
12469 entry in this lib. */
12470 unresolved_reloc = FALSE;
12471 }
12472 if (!is_opd
12473 && r_type == R_PPC64_ADDR64
12474 && (h != NULL
12475 ? h->elf.type == STT_GNU_IFUNC
12476 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12477 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12478 else
12479 {
12480 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12481
12482 /* We need to relocate .opd contents for ld.so.
12483 Prelink also wants simple and consistent rules
12484 for relocs. This make all RELATIVE relocs have
12485 *r_offset equal to r_addend. */
12486 relocate = TRUE;
12487 }
12488 }
12489 else
12490 {
12491 long indx = 0;
12492
12493 if (h != NULL
12494 ? h->elf.type == STT_GNU_IFUNC
12495 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12496 {
12497 (*_bfd_error_handler)
12498 (_("%B(%A+0x%lx): relocation %s for indirect "
12499 "function %s unsupported"),
12500 input_bfd,
12501 input_section,
12502 (long) rel->r_offset,
12503 ppc64_elf_howto_table[r_type]->name,
12504 sym_name);
12505 ret = FALSE;
12506 }
12507 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12508 ;
12509 else if (sec == NULL || sec->owner == NULL)
12510 {
12511 bfd_set_error (bfd_error_bad_value);
12512 return FALSE;
12513 }
12514 else
12515 {
12516 asection *osec;
12517
12518 osec = sec->output_section;
12519 indx = elf_section_data (osec)->dynindx;
12520
12521 if (indx == 0)
12522 {
12523 if ((osec->flags & SEC_READONLY) == 0
12524 && htab->elf.data_index_section != NULL)
12525 osec = htab->elf.data_index_section;
12526 else
12527 osec = htab->elf.text_index_section;
12528 indx = elf_section_data (osec)->dynindx;
12529 }
12530 BFD_ASSERT (indx != 0);
12531
12532 /* We are turning this relocation into one
12533 against a section symbol, so subtract out
12534 the output section's address but not the
12535 offset of the input section in the output
12536 section. */
12537 outrel.r_addend -= osec->vma;
12538 }
12539
12540 outrel.r_info = ELF64_R_INFO (indx, r_type);
12541 }
12542 }
12543
12544 sreloc = elf_section_data (input_section)->sreloc;
12545 if (!htab->elf.dynamic_sections_created)
12546 sreloc = htab->reliplt;
12547 if (sreloc == NULL)
12548 abort ();
12549
12550 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12551 >= sreloc->size)
12552 abort ();
12553 loc = sreloc->contents;
12554 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12555 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12556
12557 /* If this reloc is against an external symbol, it will
12558 be computed at runtime, so there's no need to do
12559 anything now. However, for the sake of prelink ensure
12560 that the section contents are a known value. */
12561 if (! relocate)
12562 {
12563 unresolved_reloc = FALSE;
12564 /* The value chosen here is quite arbitrary as ld.so
12565 ignores section contents except for the special
12566 case of .opd where the contents might be accessed
12567 before relocation. Choose zero, as that won't
12568 cause reloc overflow. */
12569 relocation = 0;
12570 addend = 0;
12571 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12572 to improve backward compatibility with older
12573 versions of ld. */
12574 if (r_type == R_PPC64_ADDR64)
12575 addend = outrel.r_addend;
12576 /* Adjust pc_relative relocs to have zero in *r_offset. */
12577 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12578 addend = (input_section->output_section->vma
12579 + input_section->output_offset
12580 + rel->r_offset);
12581 }
12582 }
12583 break;
12584
12585 case R_PPC64_COPY:
12586 case R_PPC64_GLOB_DAT:
12587 case R_PPC64_JMP_SLOT:
12588 case R_PPC64_JMP_IREL:
12589 case R_PPC64_RELATIVE:
12590 /* We shouldn't ever see these dynamic relocs in relocatable
12591 files. */
12592 /* Fall through. */
12593
12594 case R_PPC64_PLTGOT16:
12595 case R_PPC64_PLTGOT16_DS:
12596 case R_PPC64_PLTGOT16_HA:
12597 case R_PPC64_PLTGOT16_HI:
12598 case R_PPC64_PLTGOT16_LO:
12599 case R_PPC64_PLTGOT16_LO_DS:
12600 case R_PPC64_PLTREL32:
12601 case R_PPC64_PLTREL64:
12602 /* These ones haven't been implemented yet. */
12603
12604 (*_bfd_error_handler)
12605 (_("%B: relocation %s is not supported for symbol %s."),
12606 input_bfd,
12607 ppc64_elf_howto_table[r_type]->name, sym_name);
12608
12609 bfd_set_error (bfd_error_invalid_operation);
12610 ret = FALSE;
12611 continue;
12612 }
12613
12614 /* Do any further special processing. */
12615 switch (r_type)
12616 {
12617 default:
12618 break;
12619
12620 case R_PPC64_ADDR16_HA:
12621 case R_PPC64_REL16_HA:
12622 case R_PPC64_ADDR16_HIGHERA:
12623 case R_PPC64_ADDR16_HIGHESTA:
12624 case R_PPC64_TOC16_HA:
12625 case R_PPC64_SECTOFF_HA:
12626 case R_PPC64_TPREL16_HA:
12627 case R_PPC64_DTPREL16_HA:
12628 case R_PPC64_TPREL16_HIGHER:
12629 case R_PPC64_TPREL16_HIGHERA:
12630 case R_PPC64_TPREL16_HIGHEST:
12631 case R_PPC64_TPREL16_HIGHESTA:
12632 case R_PPC64_DTPREL16_HIGHER:
12633 case R_PPC64_DTPREL16_HIGHERA:
12634 case R_PPC64_DTPREL16_HIGHEST:
12635 case R_PPC64_DTPREL16_HIGHESTA:
12636 /* It's just possible that this symbol is a weak symbol
12637 that's not actually defined anywhere. In that case,
12638 'sec' would be NULL, and we should leave the symbol
12639 alone (it will be set to zero elsewhere in the link). */
12640 if (sec == NULL)
12641 break;
12642 /* Fall thru */
12643
12644 case R_PPC64_GOT16_HA:
12645 case R_PPC64_PLTGOT16_HA:
12646 case R_PPC64_PLT16_HA:
12647 case R_PPC64_GOT_TLSGD16_HA:
12648 case R_PPC64_GOT_TLSLD16_HA:
12649 case R_PPC64_GOT_TPREL16_HA:
12650 case R_PPC64_GOT_DTPREL16_HA:
12651 /* Add 0x10000 if sign bit in 0:15 is set.
12652 Bits 0:15 are not used. */
12653 addend += 0x8000;
12654 break;
12655
12656 case R_PPC64_ADDR16_DS:
12657 case R_PPC64_ADDR16_LO_DS:
12658 case R_PPC64_GOT16_DS:
12659 case R_PPC64_GOT16_LO_DS:
12660 case R_PPC64_PLT16_LO_DS:
12661 case R_PPC64_SECTOFF_DS:
12662 case R_PPC64_SECTOFF_LO_DS:
12663 case R_PPC64_TOC16_DS:
12664 case R_PPC64_TOC16_LO_DS:
12665 case R_PPC64_PLTGOT16_DS:
12666 case R_PPC64_PLTGOT16_LO_DS:
12667 case R_PPC64_GOT_TPREL16_DS:
12668 case R_PPC64_GOT_TPREL16_LO_DS:
12669 case R_PPC64_GOT_DTPREL16_DS:
12670 case R_PPC64_GOT_DTPREL16_LO_DS:
12671 case R_PPC64_TPREL16_DS:
12672 case R_PPC64_TPREL16_LO_DS:
12673 case R_PPC64_DTPREL16_DS:
12674 case R_PPC64_DTPREL16_LO_DS:
12675 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12676 mask = 3;
12677 /* If this reloc is against an lq insn, then the value must be
12678 a multiple of 16. This is somewhat of a hack, but the
12679 "correct" way to do this by defining _DQ forms of all the
12680 _DS relocs bloats all reloc switches in this file. It
12681 doesn't seem to make much sense to use any of these relocs
12682 in data, so testing the insn should be safe. */
12683 if ((insn & (0x3f << 26)) == (56u << 26))
12684 mask = 15;
12685 if (((relocation + addend) & mask) != 0)
12686 {
12687 (*_bfd_error_handler)
12688 (_("%B: error: relocation %s not a multiple of %d"),
12689 input_bfd,
12690 ppc64_elf_howto_table[r_type]->name,
12691 mask + 1);
12692 bfd_set_error (bfd_error_bad_value);
12693 ret = FALSE;
12694 continue;
12695 }
12696 break;
12697 }
12698
12699 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12700 because such sections are not SEC_ALLOC and thus ld.so will
12701 not process them. */
12702 if (unresolved_reloc
12703 && !((input_section->flags & SEC_DEBUGGING) != 0
12704 && h->elf.def_dynamic))
12705 {
12706 (*_bfd_error_handler)
12707 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12708 input_bfd,
12709 input_section,
12710 (long) rel->r_offset,
12711 ppc64_elf_howto_table[(int) r_type]->name,
12712 h->elf.root.root.string);
12713 ret = FALSE;
12714 }
12715
12716 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12717 input_bfd,
12718 input_section,
12719 contents,
12720 rel->r_offset,
12721 relocation,
12722 addend);
12723
12724 if (r != bfd_reloc_ok)
12725 {
12726 if (sym_name == NULL)
12727 sym_name = "(null)";
12728 if (r == bfd_reloc_overflow)
12729 {
12730 if (warned)
12731 continue;
12732 if (h != NULL
12733 && h->elf.root.type == bfd_link_hash_undefweak
12734 && ppc64_elf_howto_table[r_type]->pc_relative)
12735 {
12736 /* Assume this is a call protected by other code that
12737 detects the symbol is undefined. If this is the case,
12738 we can safely ignore the overflow. If not, the
12739 program is hosed anyway, and a little warning isn't
12740 going to help. */
12741
12742 continue;
12743 }
12744
12745 if (!((*info->callbacks->reloc_overflow)
12746 (info, (h ? &h->elf.root : NULL), sym_name,
12747 ppc64_elf_howto_table[r_type]->name,
12748 orig_addend, input_bfd, input_section, rel->r_offset)))
12749 return FALSE;
12750 }
12751 else
12752 {
12753 (*_bfd_error_handler)
12754 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12755 input_bfd,
12756 input_section,
12757 (long) rel->r_offset,
12758 ppc64_elf_howto_table[r_type]->name,
12759 sym_name,
12760 (int) r);
12761 ret = FALSE;
12762 }
12763 }
12764 }
12765
12766 /* If we're emitting relocations, then shortly after this function
12767 returns, reloc offsets and addends for this section will be
12768 adjusted. Worse, reloc symbol indices will be for the output
12769 file rather than the input. Save a copy of the relocs for
12770 opd_entry_value. */
12771 if (is_opd && (info->emitrelocations || info->relocatable))
12772 {
12773 bfd_size_type amt;
12774 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12775 rel = bfd_alloc (input_bfd, amt);
12776 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12777 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12778 if (rel == NULL)
12779 return FALSE;
12780 memcpy (rel, relocs, amt);
12781 }
12782 return ret;
12783 }
12784
12785 /* Adjust the value of any local symbols in opd sections. */
12786
12787 static int
12788 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12789 const char *name ATTRIBUTE_UNUSED,
12790 Elf_Internal_Sym *elfsym,
12791 asection *input_sec,
12792 struct elf_link_hash_entry *h)
12793 {
12794 struct _opd_sec_data *opd;
12795 long adjust;
12796 bfd_vma value;
12797
12798 if (h != NULL)
12799 return 1;
12800
12801 opd = get_opd_info (input_sec);
12802 if (opd == NULL || opd->adjust == NULL)
12803 return 1;
12804
12805 value = elfsym->st_value - input_sec->output_offset;
12806 if (!info->relocatable)
12807 value -= input_sec->output_section->vma;
12808
12809 adjust = opd->adjust[value / 8];
12810 if (adjust == -1)
12811 return 2;
12812
12813 elfsym->st_value += adjust;
12814 return 1;
12815 }
12816
12817 /* Finish up dynamic symbol handling. We set the contents of various
12818 dynamic sections here. */
12819
12820 static bfd_boolean
12821 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12822 struct bfd_link_info *info,
12823 struct elf_link_hash_entry *h,
12824 Elf_Internal_Sym *sym)
12825 {
12826 struct ppc_link_hash_table *htab;
12827 struct plt_entry *ent;
12828 Elf_Internal_Rela rela;
12829 bfd_byte *loc;
12830
12831 htab = ppc_hash_table (info);
12832 if (htab == NULL)
12833 return FALSE;
12834
12835 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12836 if (ent->plt.offset != (bfd_vma) -1)
12837 {
12838 /* This symbol has an entry in the procedure linkage
12839 table. Set it up. */
12840 if (!htab->elf.dynamic_sections_created
12841 || h->dynindx == -1)
12842 {
12843 BFD_ASSERT (h->type == STT_GNU_IFUNC
12844 && h->def_regular
12845 && (h->root.type == bfd_link_hash_defined
12846 || h->root.type == bfd_link_hash_defweak));
12847 rela.r_offset = (htab->iplt->output_section->vma
12848 + htab->iplt->output_offset
12849 + ent->plt.offset);
12850 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12851 rela.r_addend = (h->root.u.def.value
12852 + h->root.u.def.section->output_offset
12853 + h->root.u.def.section->output_section->vma
12854 + ent->addend);
12855 loc = (htab->reliplt->contents
12856 + (htab->reliplt->reloc_count++
12857 * sizeof (Elf64_External_Rela)));
12858 }
12859 else
12860 {
12861 rela.r_offset = (htab->plt->output_section->vma
12862 + htab->plt->output_offset
12863 + ent->plt.offset);
12864 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12865 rela.r_addend = ent->addend;
12866 loc = (htab->relplt->contents
12867 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12868 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12869 }
12870 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12871 }
12872
12873 if (h->needs_copy)
12874 {
12875 /* This symbol needs a copy reloc. Set it up. */
12876
12877 if (h->dynindx == -1
12878 || (h->root.type != bfd_link_hash_defined
12879 && h->root.type != bfd_link_hash_defweak)
12880 || htab->relbss == NULL)
12881 abort ();
12882
12883 rela.r_offset = (h->root.u.def.value
12884 + h->root.u.def.section->output_section->vma
12885 + h->root.u.def.section->output_offset);
12886 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12887 rela.r_addend = 0;
12888 loc = htab->relbss->contents;
12889 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12890 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12891 }
12892
12893 /* Mark some specially defined symbols as absolute. */
12894 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12895 sym->st_shndx = SHN_ABS;
12896
12897 return TRUE;
12898 }
12899
12900 /* Used to decide how to sort relocs in an optimal manner for the
12901 dynamic linker, before writing them out. */
12902
12903 static enum elf_reloc_type_class
12904 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12905 {
12906 enum elf_ppc64_reloc_type r_type;
12907
12908 r_type = ELF64_R_TYPE (rela->r_info);
12909 switch (r_type)
12910 {
12911 case R_PPC64_RELATIVE:
12912 return reloc_class_relative;
12913 case R_PPC64_JMP_SLOT:
12914 return reloc_class_plt;
12915 case R_PPC64_COPY:
12916 return reloc_class_copy;
12917 default:
12918 return reloc_class_normal;
12919 }
12920 }
12921
12922 /* Finish up the dynamic sections. */
12923
12924 static bfd_boolean
12925 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12926 struct bfd_link_info *info)
12927 {
12928 struct ppc_link_hash_table *htab;
12929 bfd *dynobj;
12930 asection *sdyn;
12931
12932 htab = ppc_hash_table (info);
12933 if (htab == NULL)
12934 return FALSE;
12935
12936 dynobj = htab->elf.dynobj;
12937 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12938
12939 if (htab->elf.dynamic_sections_created)
12940 {
12941 Elf64_External_Dyn *dyncon, *dynconend;
12942
12943 if (sdyn == NULL || htab->got == NULL)
12944 abort ();
12945
12946 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12947 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12948 for (; dyncon < dynconend; dyncon++)
12949 {
12950 Elf_Internal_Dyn dyn;
12951 asection *s;
12952
12953 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12954
12955 switch (dyn.d_tag)
12956 {
12957 default:
12958 continue;
12959
12960 case DT_PPC64_GLINK:
12961 s = htab->glink;
12962 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12963 /* We stupidly defined DT_PPC64_GLINK to be the start
12964 of glink rather than the first entry point, which is
12965 what ld.so needs, and now have a bigger stub to
12966 support automatic multiple TOCs. */
12967 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12968 break;
12969
12970 case DT_PPC64_OPD:
12971 s = bfd_get_section_by_name (output_bfd, ".opd");
12972 if (s == NULL)
12973 continue;
12974 dyn.d_un.d_ptr = s->vma;
12975 break;
12976
12977 case DT_PPC64_OPDSZ:
12978 s = bfd_get_section_by_name (output_bfd, ".opd");
12979 if (s == NULL)
12980 continue;
12981 dyn.d_un.d_val = s->size;
12982 break;
12983
12984 case DT_PLTGOT:
12985 s = htab->plt;
12986 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12987 break;
12988
12989 case DT_JMPREL:
12990 s = htab->relplt;
12991 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12992 break;
12993
12994 case DT_PLTRELSZ:
12995 dyn.d_un.d_val = htab->relplt->size;
12996 break;
12997
12998 case DT_RELASZ:
12999 /* Don't count procedure linkage table relocs in the
13000 overall reloc count. */
13001 s = htab->relplt;
13002 if (s == NULL)
13003 continue;
13004 dyn.d_un.d_val -= s->size;
13005 break;
13006
13007 case DT_RELA:
13008 /* We may not be using the standard ELF linker script.
13009 If .rela.plt is the first .rela section, we adjust
13010 DT_RELA to not include it. */
13011 s = htab->relplt;
13012 if (s == NULL)
13013 continue;
13014 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13015 continue;
13016 dyn.d_un.d_ptr += s->size;
13017 break;
13018 }
13019
13020 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13021 }
13022 }
13023
13024 if (htab->got != NULL && htab->got->size != 0)
13025 {
13026 /* Fill in the first entry in the global offset table.
13027 We use it to hold the link-time TOCbase. */
13028 bfd_put_64 (output_bfd,
13029 elf_gp (output_bfd) + TOC_BASE_OFF,
13030 htab->got->contents);
13031
13032 /* Set .got entry size. */
13033 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13034 }
13035
13036 if (htab->plt != NULL && htab->plt->size != 0)
13037 {
13038 /* Set .plt entry size. */
13039 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13040 = PLT_ENTRY_SIZE;
13041 }
13042
13043 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13044 brlt ourselves if emitrelocations. */
13045 if (htab->brlt != NULL
13046 && htab->brlt->reloc_count != 0
13047 && !_bfd_elf_link_output_relocs (output_bfd,
13048 htab->brlt,
13049 &elf_section_data (htab->brlt)->rel_hdr,
13050 elf_section_data (htab->brlt)->relocs,
13051 NULL))
13052 return FALSE;
13053
13054 if (htab->glink != NULL
13055 && htab->glink->reloc_count != 0
13056 && !_bfd_elf_link_output_relocs (output_bfd,
13057 htab->glink,
13058 &elf_section_data (htab->glink)->rel_hdr,
13059 elf_section_data (htab->glink)->relocs,
13060 NULL))
13061 return FALSE;
13062
13063 /* We need to handle writing out multiple GOT sections ourselves,
13064 since we didn't add them to DYNOBJ. We know dynobj is the first
13065 bfd. */
13066 while ((dynobj = dynobj->link_next) != NULL)
13067 {
13068 asection *s;
13069
13070 if (!is_ppc64_elf (dynobj))
13071 continue;
13072
13073 s = ppc64_elf_tdata (dynobj)->got;
13074 if (s != NULL
13075 && s->size != 0
13076 && s->output_section != bfd_abs_section_ptr
13077 && !bfd_set_section_contents (output_bfd, s->output_section,
13078 s->contents, s->output_offset,
13079 s->size))
13080 return FALSE;
13081 s = ppc64_elf_tdata (dynobj)->relgot;
13082 if (s != NULL
13083 && s->size != 0
13084 && s->output_section != bfd_abs_section_ptr
13085 && !bfd_set_section_contents (output_bfd, s->output_section,
13086 s->contents, s->output_offset,
13087 s->size))
13088 return FALSE;
13089 }
13090
13091 return TRUE;
13092 }
13093
13094 #include "elf64-target.h"
GDB Binutils - Deliverables
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