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* testsuite/debug_msg.sh: Test mixed weak/strong symbol behavior.
[binutils.git] / bfd / elf64-ppc.c
blobb97bd3aed3bd2b44a8a4e6af2c6e5f926cbff4b7
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 /* Track GOT entries needed for a given symbol. We might need more
2530 than one got entry per symbol. */
2531 struct got_entry
2532 {
2533 struct got_entry *next;
2534
2535 /* The symbol addend that we'll be placing in the GOT. */
2536 bfd_vma addend;
2537
2538 /* Unlike other ELF targets, we use separate GOT entries for the same
2539 symbol referenced from different input files. This is to support
2540 automatic multiple TOC/GOT sections, where the TOC base can vary
2541 from one input file to another. After partitioning into TOC groups
2542 we merge entries within the group.
2543
2544 Point to the BFD owning this GOT entry. */
2545 bfd *owner;
2546
2547 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2548 TLS_TPREL or TLS_DTPREL for tls entries. */
2549 unsigned char tls_type;
2550
2551 /* Non-zero if got.ent points to real entry. */
2552 unsigned char is_indirect;
2553
2554 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2555 union
2556 {
2557 bfd_signed_vma refcount;
2558 bfd_vma offset;
2559 struct got_entry *ent;
2560 } got;
2561 };
2562
2563 /* The same for PLT. */
2564 struct plt_entry
2565 {
2566 struct plt_entry *next;
2567
2568 bfd_vma addend;
2569
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } plt;
2575 };
2576
2577 struct ppc64_elf_obj_tdata
2578 {
2579 struct elf_obj_tdata elf;
2580
2581 /* Shortcuts to dynamic linker sections. */
2582 asection *got;
2583 asection *relgot;
2584
2585 /* Used during garbage collection. We attach global symbols defined
2586 on removed .opd entries to this section so that the sym is removed. */
2587 asection *deleted_section;
2588
2589 /* TLS local dynamic got entry handling. Support for multiple GOT
2590 sections means we potentially need one of these for each input bfd. */
2591 struct got_entry tlsld_got;
2592
2593 /* A copy of relocs before they are modified for --emit-relocs. */
2594 Elf_Internal_Rela *opd_relocs;
2595
2596 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2597 the reloc to be in the range -32768 to 32767. */
2598 unsigned int has_small_toc_reloc;
2599 };
2600
2601 #define ppc64_elf_tdata(bfd) \
2602 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2603
2604 #define ppc64_tlsld_got(bfd) \
2605 (&ppc64_elf_tdata (bfd)->tlsld_got)
2606
2607 #define is_ppc64_elf(bfd) \
2608 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2609 && elf_object_id (bfd) == PPC64_ELF_DATA)
2610
2611 /* Override the generic function because we store some extras. */
2612
2613 static bfd_boolean
2614 ppc64_elf_mkobject (bfd *abfd)
2615 {
2616 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2617 PPC64_ELF_DATA);
2618 }
2619
2620 /* Fix bad default arch selected for a 64 bit input bfd when the
2621 default is 32 bit. */
2622
2623 static bfd_boolean
2624 ppc64_elf_object_p (bfd *abfd)
2625 {
2626 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2627 {
2628 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2629
2630 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2631 {
2632 /* Relies on arch after 32 bit default being 64 bit default. */
2633 abfd->arch_info = abfd->arch_info->next;
2634 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2635 }
2636 }
2637 return TRUE;
2638 }
2639
2640 /* Support for core dump NOTE sections. */
2641
2642 static bfd_boolean
2643 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2644 {
2645 size_t offset, size;
2646
2647 if (note->descsz != 504)
2648 return FALSE;
2649
2650 /* pr_cursig */
2651 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2652
2653 /* pr_pid */
2654 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2655
2656 /* pr_reg */
2657 offset = 112;
2658 size = 384;
2659
2660 /* Make a ".reg/999" section. */
2661 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2662 size, note->descpos + offset);
2663 }
2664
2665 static bfd_boolean
2666 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2667 {
2668 if (note->descsz != 136)
2669 return FALSE;
2670
2671 elf_tdata (abfd)->core_program
2672 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2673 elf_tdata (abfd)->core_command
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2675
2676 return TRUE;
2677 }
2678
2679 static char *
2680 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2681 ...)
2682 {
2683 switch (note_type)
2684 {
2685 default:
2686 return NULL;
2687
2688 case NT_PRPSINFO:
2689 {
2690 char data[136];
2691 va_list ap;
2692
2693 va_start (ap, note_type);
2694 memset (data, 0, 40);
2695 strncpy (data + 40, va_arg (ap, const char *), 16);
2696 strncpy (data + 56, va_arg (ap, const char *), 80);
2697 va_end (ap);
2698 return elfcore_write_note (abfd, buf, bufsiz,
2699 "CORE", note_type, data, sizeof (data));
2700 }
2701
2702 case NT_PRSTATUS:
2703 {
2704 char data[504];
2705 va_list ap;
2706 long pid;
2707 int cursig;
2708 const void *greg;
2709
2710 va_start (ap, note_type);
2711 memset (data, 0, 112);
2712 pid = va_arg (ap, long);
2713 bfd_put_32 (abfd, pid, data + 32);
2714 cursig = va_arg (ap, int);
2715 bfd_put_16 (abfd, cursig, data + 12);
2716 greg = va_arg (ap, const void *);
2717 memcpy (data + 112, greg, 384);
2718 memset (data + 496, 0, 8);
2719 va_end (ap);
2720 return elfcore_write_note (abfd, buf, bufsiz,
2721 "CORE", note_type, data, sizeof (data));
2722 }
2723 }
2724 }
2725
2726 /* Merge backend specific data from an object file to the output
2727 object file when linking. */
2728
2729 static bfd_boolean
2730 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2731 {
2732 /* Check if we have the same endianess. */
2733 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2734 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2735 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2736 {
2737 const char *msg;
2738
2739 if (bfd_big_endian (ibfd))
2740 msg = _("%B: compiled for a big endian system "
2741 "and target is little endian");
2742 else
2743 msg = _("%B: compiled for a little endian system "
2744 "and target is big endian");
2745
2746 (*_bfd_error_handler) (msg, ibfd);
2747
2748 bfd_set_error (bfd_error_wrong_format);
2749 return FALSE;
2750 }
2751
2752 return TRUE;
2753 }
2754
2755 /* Add extra PPC sections. */
2756
2757 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2758 {
2759 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2760 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2761 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2765 { NULL, 0, 0, 0, 0 }
2766 };
2767
2768 enum _ppc64_sec_type {
2769 sec_normal = 0,
2770 sec_opd = 1,
2771 sec_toc = 2
2772 };
2773
2774 struct _ppc64_elf_section_data
2775 {
2776 struct bfd_elf_section_data elf;
2777
2778 union
2779 {
2780 /* An array with one entry for each opd function descriptor. */
2781 struct _opd_sec_data
2782 {
2783 /* Points to the function code section for local opd entries. */
2784 asection **func_sec;
2785
2786 /* After editing .opd, adjust references to opd local syms. */
2787 long *adjust;
2788 } opd;
2789
2790 /* An array for toc sections, indexed by offset/8. */
2791 struct _toc_sec_data
2792 {
2793 /* Specifies the relocation symbol index used at a given toc offset. */
2794 unsigned *symndx;
2795
2796 /* And the relocation addend. */
2797 bfd_vma *add;
2798 } toc;
2799 } u;
2800
2801 enum _ppc64_sec_type sec_type:2;
2802
2803 /* Flag set when small branches are detected. Used to
2804 select suitable defaults for the stub group size. */
2805 unsigned int has_14bit_branch:1;
2806 };
2807
2808 #define ppc64_elf_section_data(sec) \
2809 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2810
2811 static bfd_boolean
2812 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2813 {
2814 if (!sec->used_by_bfd)
2815 {
2816 struct _ppc64_elf_section_data *sdata;
2817 bfd_size_type amt = sizeof (*sdata);
2818
2819 sdata = bfd_zalloc (abfd, amt);
2820 if (sdata == NULL)
2821 return FALSE;
2822 sec->used_by_bfd = sdata;
2823 }
2824
2825 return _bfd_elf_new_section_hook (abfd, sec);
2826 }
2827
2828 static struct _opd_sec_data *
2829 get_opd_info (asection * sec)
2830 {
2831 if (sec != NULL
2832 && ppc64_elf_section_data (sec) != NULL
2833 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2834 return &ppc64_elf_section_data (sec)->u.opd;
2835 return NULL;
2836 }
2837 \f
2838 /* Parameters for the qsort hook. */
2839 static bfd_boolean synthetic_relocatable;
2840
2841 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2842
2843 static int
2844 compare_symbols (const void *ap, const void *bp)
2845 {
2846 const asymbol *a = * (const asymbol **) ap;
2847 const asymbol *b = * (const asymbol **) bp;
2848
2849 /* Section symbols first. */
2850 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2851 return -1;
2852 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2853 return 1;
2854
2855 /* then .opd symbols. */
2856 if (strcmp (a->section->name, ".opd") == 0
2857 && strcmp (b->section->name, ".opd") != 0)
2858 return -1;
2859 if (strcmp (a->section->name, ".opd") != 0
2860 && strcmp (b->section->name, ".opd") == 0)
2861 return 1;
2862
2863 /* then other code symbols. */
2864 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2865 == (SEC_CODE | SEC_ALLOC)
2866 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC))
2868 return -1;
2869
2870 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2871 != (SEC_CODE | SEC_ALLOC)
2872 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 == (SEC_CODE | SEC_ALLOC))
2874 return 1;
2875
2876 if (synthetic_relocatable)
2877 {
2878 if (a->section->id < b->section->id)
2879 return -1;
2880
2881 if (a->section->id > b->section->id)
2882 return 1;
2883 }
2884
2885 if (a->value + a->section->vma < b->value + b->section->vma)
2886 return -1;
2887
2888 if (a->value + a->section->vma > b->value + b->section->vma)
2889 return 1;
2890
2891 /* For syms with the same value, prefer strong dynamic global function
2892 syms over other syms. */
2893 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2894 return -1;
2895
2896 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2897 return 1;
2898
2899 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2900 return -1;
2901
2902 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2903 return 1;
2904
2905 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2906 return -1;
2907
2908 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2909 return 1;
2910
2911 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2912 return -1;
2913
2914 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2915 return 1;
2916
2917 return 0;
2918 }
2919
2920 /* Search SYMS for a symbol of the given VALUE. */
2921
2922 static asymbol *
2923 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2924 {
2925 long mid;
2926
2927 if (id == -1)
2928 {
2929 while (lo < hi)
2930 {
2931 mid = (lo + hi) >> 1;
2932 if (syms[mid]->value + syms[mid]->section->vma < value)
2933 lo = mid + 1;
2934 else if (syms[mid]->value + syms[mid]->section->vma > value)
2935 hi = mid;
2936 else
2937 return syms[mid];
2938 }
2939 }
2940 else
2941 {
2942 while (lo < hi)
2943 {
2944 mid = (lo + hi) >> 1;
2945 if (syms[mid]->section->id < id)
2946 lo = mid + 1;
2947 else if (syms[mid]->section->id > id)
2948 hi = mid;
2949 else if (syms[mid]->value < value)
2950 lo = mid + 1;
2951 else if (syms[mid]->value > value)
2952 hi = mid;
2953 else
2954 return syms[mid];
2955 }
2956 }
2957 return NULL;
2958 }
2959
2960 static bfd_boolean
2961 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2962 {
2963 bfd_vma vma = *(bfd_vma *) ptr;
2964 return ((section->flags & SEC_ALLOC) != 0
2965 && section->vma <= vma
2966 && vma < section->vma + section->size);
2967 }
2968
2969 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2970 entry syms. Also generate @plt symbols for the glink branch table. */
2971
2972 static long
2973 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2974 long static_count, asymbol **static_syms,
2975 long dyn_count, asymbol **dyn_syms,
2976 asymbol **ret)
2977 {
2978 asymbol *s;
2979 long i;
2980 long count;
2981 char *names;
2982 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2983 asection *opd;
2984 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2985 asymbol **syms;
2986
2987 *ret = NULL;
2988
2989 opd = bfd_get_section_by_name (abfd, ".opd");
2990 if (opd == NULL)
2991 return 0;
2992
2993 symcount = static_count;
2994 if (!relocatable)
2995 symcount += dyn_count;
2996 if (symcount == 0)
2997 return 0;
2998
2999 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3000 if (syms == NULL)
3001 return -1;
3002
3003 if (!relocatable && static_count != 0 && dyn_count != 0)
3004 {
3005 /* Use both symbol tables. */
3006 memcpy (syms, static_syms, static_count * sizeof (*syms));
3007 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3008 }
3009 else if (!relocatable && static_count == 0)
3010 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3011 else
3012 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3013
3014 synthetic_relocatable = relocatable;
3015 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3016
3017 if (!relocatable && symcount > 1)
3018 {
3019 long j;
3020 /* Trim duplicate syms, since we may have merged the normal and
3021 dynamic symbols. Actually, we only care about syms that have
3022 different values, so trim any with the same value. */
3023 for (i = 1, j = 1; i < symcount; ++i)
3024 if (syms[i - 1]->value + syms[i - 1]->section->vma
3025 != syms[i]->value + syms[i]->section->vma)
3026 syms[j++] = syms[i];
3027 symcount = j;
3028 }
3029
3030 i = 0;
3031 if (strcmp (syms[i]->section->name, ".opd") == 0)
3032 ++i;
3033 codesecsym = i;
3034
3035 for (; i < symcount; ++i)
3036 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3037 != (SEC_CODE | SEC_ALLOC))
3038 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3039 break;
3040 codesecsymend = i;
3041
3042 for (; i < symcount; ++i)
3043 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 break;
3045 secsymend = i;
3046
3047 for (; i < symcount; ++i)
3048 if (strcmp (syms[i]->section->name, ".opd") != 0)
3049 break;
3050 opdsymend = i;
3051
3052 for (; i < symcount; ++i)
3053 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3054 != (SEC_CODE | SEC_ALLOC))
3055 break;
3056 symcount = i;
3057
3058 count = 0;
3059
3060 if (relocatable)
3061 {
3062 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3063 arelent *r;
3064 size_t size;
3065 long relcount;
3066
3067 if (opdsymend == secsymend)
3068 goto done;
3069
3070 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3071 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3072 if (relcount == 0)
3073 goto done;
3074
3075 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3076 {
3077 count = -1;
3078 goto done;
3079 }
3080
3081 size = 0;
3082 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3083 {
3084 asymbol *sym;
3085
3086 while (r < opd->relocation + relcount
3087 && r->address < syms[i]->value + opd->vma)
3088 ++r;
3089
3090 if (r == opd->relocation + relcount)
3091 break;
3092
3093 if (r->address != syms[i]->value + opd->vma)
3094 continue;
3095
3096 if (r->howto->type != R_PPC64_ADDR64)
3097 continue;
3098
3099 sym = *r->sym_ptr_ptr;
3100 if (!sym_exists_at (syms, opdsymend, symcount,
3101 sym->section->id, sym->value + r->addend))
3102 {
3103 ++count;
3104 size += sizeof (asymbol);
3105 size += strlen (syms[i]->name) + 2;
3106 }
3107 }
3108
3109 s = *ret = bfd_malloc (size);
3110 if (s == NULL)
3111 {
3112 count = -1;
3113 goto done;
3114 }
3115
3116 names = (char *) (s + count);
3117
3118 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3119 {
3120 asymbol *sym;
3121
3122 while (r < opd->relocation + relcount
3123 && r->address < syms[i]->value + opd->vma)
3124 ++r;
3125
3126 if (r == opd->relocation + relcount)
3127 break;
3128
3129 if (r->address != syms[i]->value + opd->vma)
3130 continue;
3131
3132 if (r->howto->type != R_PPC64_ADDR64)
3133 continue;
3134
3135 sym = *r->sym_ptr_ptr;
3136 if (!sym_exists_at (syms, opdsymend, symcount,
3137 sym->section->id, sym->value + r->addend))
3138 {
3139 size_t len;
3140
3141 *s = *syms[i];
3142 s->flags |= BSF_SYNTHETIC;
3143 s->section = sym->section;
3144 s->value = sym->value + r->addend;
3145 s->name = names;
3146 *names++ = '.';
3147 len = strlen (syms[i]->name);
3148 memcpy (names, syms[i]->name, len + 1);
3149 names += len + 1;
3150 /* Have udata.p point back to the original symbol this
3151 synthetic symbol was derived from. */
3152 s->udata.p = syms[i];
3153 s++;
3154 }
3155 }
3156 }
3157 else
3158 {
3159 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3160 bfd_byte *contents;
3161 size_t size;
3162 long plt_count = 0;
3163 bfd_vma glink_vma = 0, resolv_vma = 0;
3164 asection *dynamic, *glink = NULL, *relplt = NULL;
3165 arelent *p;
3166
3167 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3168 {
3169 if (contents)
3170 {
3171 free_contents_and_exit:
3172 free (contents);
3173 }
3174 count = -1;
3175 goto done;
3176 }
3177
3178 size = 0;
3179 for (i = secsymend; i < opdsymend; ++i)
3180 {
3181 bfd_vma ent;
3182
3183 /* Ignore bogus symbols. */
3184 if (syms[i]->value > opd->size - 8)
3185 continue;
3186
3187 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3188 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3189 {
3190 ++count;
3191 size += sizeof (asymbol);
3192 size += strlen (syms[i]->name) + 2;
3193 }
3194 }
3195
3196 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3197 if (dyn_count != 0
3198 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3199 {
3200 bfd_byte *dynbuf, *extdyn, *extdynend;
3201 size_t extdynsize;
3202 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3203
3204 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3205 goto free_contents_and_exit;
3206
3207 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3208 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3209
3210 extdyn = dynbuf;
3211 extdynend = extdyn + dynamic->size;
3212 for (; extdyn < extdynend; extdyn += extdynsize)
3213 {
3214 Elf_Internal_Dyn dyn;
3215 (*swap_dyn_in) (abfd, extdyn, &dyn);
3216
3217 if (dyn.d_tag == DT_NULL)
3218 break;
3219
3220 if (dyn.d_tag == DT_PPC64_GLINK)
3221 {
3222 /* The first glink stub starts at offset 32; see comment in
3223 ppc64_elf_finish_dynamic_sections. */
3224 glink_vma = dyn.d_un.d_val + 32;
3225 /* The .glink section usually does not survive the final
3226 link; search for the section (usually .text) where the
3227 glink stubs now reside. */
3228 glink = bfd_sections_find_if (abfd, section_covers_vma,
3229 &glink_vma);
3230 break;
3231 }
3232 }
3233
3234 free (dynbuf);
3235 }
3236
3237 if (glink != NULL)
3238 {
3239 /* Determine __glink trampoline by reading the relative branch
3240 from the first glink stub. */
3241 bfd_byte buf[4];
3242 if (bfd_get_section_contents (abfd, glink, buf,
3243 glink_vma + 4 - glink->vma, 4))
3244 {
3245 unsigned int insn = bfd_get_32 (abfd, buf);
3246 insn ^= B_DOT;
3247 if ((insn & ~0x3fffffc) == 0)
3248 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3249 }
3250
3251 if (resolv_vma)
3252 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3253
3254 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3255 if (relplt != NULL)
3256 {
3257 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3258 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3259 goto free_contents_and_exit;
3260
3261 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3262 size += plt_count * sizeof (asymbol);
3263
3264 p = relplt->relocation;
3265 for (i = 0; i < plt_count; i++, p++)
3266 {
3267 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3268 if (p->addend != 0)
3269 size += sizeof ("+0x") - 1 + 16;
3270 }
3271 }
3272 }
3273
3274 s = *ret = bfd_malloc (size);
3275 if (s == NULL)
3276 goto free_contents_and_exit;
3277
3278 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3279
3280 for (i = secsymend; i < opdsymend; ++i)
3281 {
3282 bfd_vma ent;
3283
3284 if (syms[i]->value > opd->size - 8)
3285 continue;
3286
3287 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3288 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3289 {
3290 long lo, hi;
3291 size_t len;
3292 asection *sec = abfd->sections;
3293
3294 *s = *syms[i];
3295 lo = codesecsym;
3296 hi = codesecsymend;
3297 while (lo < hi)
3298 {
3299 long mid = (lo + hi) >> 1;
3300 if (syms[mid]->section->vma < ent)
3301 lo = mid + 1;
3302 else if (syms[mid]->section->vma > ent)
3303 hi = mid;
3304 else
3305 {
3306 sec = syms[mid]->section;
3307 break;
3308 }
3309 }
3310
3311 if (lo >= hi && lo > codesecsym)
3312 sec = syms[lo - 1]->section;
3313
3314 for (; sec != NULL; sec = sec->next)
3315 {
3316 if (sec->vma > ent)
3317 break;
3318 if ((sec->flags & SEC_ALLOC) == 0
3319 || (sec->flags & SEC_LOAD) == 0)
3320 break;
3321 if ((sec->flags & SEC_CODE) != 0)
3322 s->section = sec;
3323 }
3324 s->flags |= BSF_SYNTHETIC;
3325 s->value = ent - s->section->vma;
3326 s->name = names;
3327 *names++ = '.';
3328 len = strlen (syms[i]->name);
3329 memcpy (names, syms[i]->name, len + 1);
3330 names += len + 1;
3331 /* Have udata.p point back to the original symbol this
3332 synthetic symbol was derived from. */
3333 s->udata.p = syms[i];
3334 s++;
3335 }
3336 }
3337 free (contents);
3338
3339 if (glink != NULL && relplt != NULL)
3340 {
3341 if (resolv_vma)
3342 {
3343 /* Add a symbol for the main glink trampoline. */
3344 memset (s, 0, sizeof *s);
3345 s->the_bfd = abfd;
3346 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3347 s->section = glink;
3348 s->value = resolv_vma - glink->vma;
3349 s->name = names;
3350 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3351 names += sizeof ("__glink_PLTresolve");
3352 s++;
3353 count++;
3354 }
3355
3356 /* FIXME: It would be very much nicer to put sym@plt on the
3357 stub rather than on the glink branch table entry. The
3358 objdump disassembler would then use a sensible symbol
3359 name on plt calls. The difficulty in doing so is
3360 a) finding the stubs, and,
3361 b) matching stubs against plt entries, and,
3362 c) there can be multiple stubs for a given plt entry.
3363
3364 Solving (a) could be done by code scanning, but older
3365 ppc64 binaries used different stubs to current code.
3366 (b) is the tricky one since you need to known the toc
3367 pointer for at least one function that uses a pic stub to
3368 be able to calculate the plt address referenced.
3369 (c) means gdb would need to set multiple breakpoints (or
3370 find the glink branch itself) when setting breakpoints
3371 for pending shared library loads. */
3372 p = relplt->relocation;
3373 for (i = 0; i < plt_count; i++, p++)
3374 {
3375 size_t len;
3376
3377 *s = **p->sym_ptr_ptr;
3378 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3379 we are defining a symbol, ensure one of them is set. */
3380 if ((s->flags & BSF_LOCAL) == 0)
3381 s->flags |= BSF_GLOBAL;
3382 s->flags |= BSF_SYNTHETIC;
3383 s->section = glink;
3384 s->value = glink_vma - glink->vma;
3385 s->name = names;
3386 s->udata.p = NULL;
3387 len = strlen ((*p->sym_ptr_ptr)->name);
3388 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3389 names += len;
3390 if (p->addend != 0)
3391 {
3392 memcpy (names, "+0x", sizeof ("+0x") - 1);
3393 names += sizeof ("+0x") - 1;
3394 bfd_sprintf_vma (abfd, names, p->addend);
3395 names += strlen (names);
3396 }
3397 memcpy (names, "@plt", sizeof ("@plt"));
3398 names += sizeof ("@plt");
3399 s++;
3400 glink_vma += 8;
3401 if (i >= 0x8000)
3402 glink_vma += 4;
3403 }
3404 count += plt_count;
3405 }
3406 }
3407
3408 done:
3409 free (syms);
3410 return count;
3411 }
3412 \f
3413 /* The following functions are specific to the ELF linker, while
3414 functions above are used generally. Those named ppc64_elf_* are
3415 called by the main ELF linker code. They appear in this file more
3416 or less in the order in which they are called. eg.
3417 ppc64_elf_check_relocs is called early in the link process,
3418 ppc64_elf_finish_dynamic_sections is one of the last functions
3419 called.
3420
3421 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3422 functions have both a function code symbol and a function descriptor
3423 symbol. A call to foo in a relocatable object file looks like:
3424
3425 . .text
3426 . x:
3427 . bl .foo
3428 . nop
3429
3430 The function definition in another object file might be:
3431
3432 . .section .opd
3433 . foo: .quad .foo
3434 . .quad .TOC.@tocbase
3435 . .quad 0
3436 .
3437 . .text
3438 . .foo: blr
3439
3440 When the linker resolves the call during a static link, the branch
3441 unsurprisingly just goes to .foo and the .opd information is unused.
3442 If the function definition is in a shared library, things are a little
3443 different: The call goes via a plt call stub, the opd information gets
3444 copied to the plt, and the linker patches the nop.
3445
3446 . x:
3447 . bl .foo_stub
3448 . ld 2,40(1)
3449 .
3450 .
3451 . .foo_stub:
3452 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3453 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3454 . std 2,40(1) # this is the general idea
3455 . ld 11,0(12)
3456 . ld 2,8(12)
3457 . mtctr 11
3458 . ld 11,16(12)
3459 . bctr
3460 .
3461 . .section .plt
3462 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3463
3464 The "reloc ()" notation is supposed to indicate that the linker emits
3465 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3466 copying.
3467
3468 What are the difficulties here? Well, firstly, the relocations
3469 examined by the linker in check_relocs are against the function code
3470 sym .foo, while the dynamic relocation in the plt is emitted against
3471 the function descriptor symbol, foo. Somewhere along the line, we need
3472 to carefully copy dynamic link information from one symbol to the other.
3473 Secondly, the generic part of the elf linker will make .foo a dynamic
3474 symbol as is normal for most other backends. We need foo dynamic
3475 instead, at least for an application final link. However, when
3476 creating a shared library containing foo, we need to have both symbols
3477 dynamic so that references to .foo are satisfied during the early
3478 stages of linking. Otherwise the linker might decide to pull in a
3479 definition from some other object, eg. a static library.
3480
3481 Update: As of August 2004, we support a new convention. Function
3482 calls may use the function descriptor symbol, ie. "bl foo". This
3483 behaves exactly as "bl .foo". */
3484
3485 /* The linker needs to keep track of the number of relocs that it
3486 decides to copy as dynamic relocs in check_relocs for each symbol.
3487 This is so that it can later discard them if they are found to be
3488 unnecessary. We store the information in a field extending the
3489 regular ELF linker hash table. */
3490
3491 struct ppc_dyn_relocs
3492 {
3493 struct ppc_dyn_relocs *next;
3494
3495 /* The input section of the reloc. */
3496 asection *sec;
3497
3498 /* Total number of relocs copied for the input section. */
3499 bfd_size_type count;
3500
3501 /* Number of pc-relative relocs copied for the input section. */
3502 bfd_size_type pc_count;
3503 };
3504
3505 /* Of those relocs that might be copied as dynamic relocs, this function
3506 selects those that must be copied when linking a shared library,
3507 even when the symbol is local. */
3508
3509 static int
3510 must_be_dyn_reloc (struct bfd_link_info *info,
3511 enum elf_ppc64_reloc_type r_type)
3512 {
3513 switch (r_type)
3514 {
3515 default:
3516 return 1;
3517
3518 case R_PPC64_REL32:
3519 case R_PPC64_REL64:
3520 case R_PPC64_REL30:
3521 return 0;
3522
3523 case R_PPC64_TPREL16:
3524 case R_PPC64_TPREL16_LO:
3525 case R_PPC64_TPREL16_HI:
3526 case R_PPC64_TPREL16_HA:
3527 case R_PPC64_TPREL16_DS:
3528 case R_PPC64_TPREL16_LO_DS:
3529 case R_PPC64_TPREL16_HIGHER:
3530 case R_PPC64_TPREL16_HIGHERA:
3531 case R_PPC64_TPREL16_HIGHEST:
3532 case R_PPC64_TPREL16_HIGHESTA:
3533 case R_PPC64_TPREL64:
3534 return !info->executable;
3535 }
3536 }
3537
3538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3539 copying dynamic variables from a shared lib into an app's dynbss
3540 section, and instead use a dynamic relocation to point into the
3541 shared lib. With code that gcc generates, it's vital that this be
3542 enabled; In the PowerPC64 ABI, the address of a function is actually
3543 the address of a function descriptor, which resides in the .opd
3544 section. gcc uses the descriptor directly rather than going via the
3545 GOT as some other ABI's do, which means that initialized function
3546 pointers must reference the descriptor. Thus, a function pointer
3547 initialized to the address of a function in a shared library will
3548 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3549 redefines the function descriptor symbol to point to the copy. This
3550 presents a problem as a plt entry for that function is also
3551 initialized from the function descriptor symbol and the copy reloc
3552 may not be initialized first. */
3553 #define ELIMINATE_COPY_RELOCS 1
3554
3555 /* Section name for stubs is the associated section name plus this
3556 string. */
3557 #define STUB_SUFFIX ".stub"
3558
3559 /* Linker stubs.
3560 ppc_stub_long_branch:
3561 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3562 destination, but a 24 bit branch in a stub section will reach.
3563 . b dest
3564
3565 ppc_stub_plt_branch:
3566 Similar to the above, but a 24 bit branch in the stub section won't
3567 reach its destination.
3568 . addis %r12,%r2,xxx@toc@ha
3569 . ld %r11,xxx@toc@l(%r12)
3570 . mtctr %r11
3571 . bctr
3572
3573 ppc_stub_plt_call:
3574 Used to call a function in a shared library. If it so happens that
3575 the plt entry referenced crosses a 64k boundary, then an extra
3576 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3577 . addis %r12,%r2,xxx@toc@ha
3578 . std %r2,40(%r1)
3579 . ld %r11,xxx+0@toc@l(%r12)
3580 . mtctr %r11
3581 . ld %r2,xxx+8@toc@l(%r12)
3582 . ld %r11,xxx+16@toc@l(%r12)
3583 . bctr
3584
3585 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3586 code to adjust the value and save r2 to support multiple toc sections.
3587 A ppc_stub_long_branch with an r2 offset looks like:
3588 . std %r2,40(%r1)
3589 . addis %r2,%r2,off@ha
3590 . addi %r2,%r2,off@l
3591 . b dest
3592
3593 A ppc_stub_plt_branch with an r2 offset looks like:
3594 . std %r2,40(%r1)
3595 . addis %r12,%r2,xxx@toc@ha
3596 . ld %r11,xxx@toc@l(%r12)
3597 . addis %r2,%r2,off@ha
3598 . addi %r2,%r2,off@l
3599 . mtctr %r11
3600 . bctr
3601
3602 In cases where the "addis" instruction would add zero, the "addis" is
3603 omitted and following instructions modified slightly in some cases.
3604 */
3605
3606 enum ppc_stub_type {
3607 ppc_stub_none,
3608 ppc_stub_long_branch,
3609 ppc_stub_long_branch_r2off,
3610 ppc_stub_plt_branch,
3611 ppc_stub_plt_branch_r2off,
3612 ppc_stub_plt_call
3613 };
3614
3615 struct ppc_stub_hash_entry {
3616
3617 /* Base hash table entry structure. */
3618 struct bfd_hash_entry root;
3619
3620 enum ppc_stub_type stub_type;
3621
3622 /* The stub section. */
3623 asection *stub_sec;
3624
3625 /* Offset within stub_sec of the beginning of this stub. */
3626 bfd_vma stub_offset;
3627
3628 /* Given the symbol's value and its section we can determine its final
3629 value when building the stubs (so the stub knows where to jump. */
3630 bfd_vma target_value;
3631 asection *target_section;
3632
3633 /* The symbol table entry, if any, that this was derived from. */
3634 struct ppc_link_hash_entry *h;
3635 struct plt_entry *plt_ent;
3636
3637 /* And the reloc addend that this was derived from. */
3638 bfd_vma addend;
3639
3640 /* Where this stub is being called from, or, in the case of combined
3641 stub sections, the first input section in the group. */
3642 asection *id_sec;
3643 };
3644
3645 struct ppc_branch_hash_entry {
3646
3647 /* Base hash table entry structure. */
3648 struct bfd_hash_entry root;
3649
3650 /* Offset within branch lookup table. */
3651 unsigned int offset;
3652
3653 /* Generation marker. */
3654 unsigned int iter;
3655 };
3656
3657 struct ppc_link_hash_entry
3658 {
3659 struct elf_link_hash_entry elf;
3660
3661 union {
3662 /* A pointer to the most recently used stub hash entry against this
3663 symbol. */
3664 struct ppc_stub_hash_entry *stub_cache;
3665
3666 /* A pointer to the next symbol starting with a '.' */
3667 struct ppc_link_hash_entry *next_dot_sym;
3668 } u;
3669
3670 /* Track dynamic relocs copied for this symbol. */
3671 struct ppc_dyn_relocs *dyn_relocs;
3672
3673 /* Link between function code and descriptor symbols. */
3674 struct ppc_link_hash_entry *oh;
3675
3676 /* Flag function code and descriptor symbols. */
3677 unsigned int is_func:1;
3678 unsigned int is_func_descriptor:1;
3679 unsigned int fake:1;
3680
3681 /* Whether global opd/toc sym has been adjusted or not.
3682 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3683 should be set for all globals defined in any opd/toc section. */
3684 unsigned int adjust_done:1;
3685
3686 /* Set if we twiddled this symbol to weak at some stage. */
3687 unsigned int was_undefined:1;
3688
3689 /* Contexts in which symbol is used in the GOT (or TOC).
3690 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3691 corresponding relocs are encountered during check_relocs.
3692 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3693 indicate the corresponding GOT entry type is not needed.
3694 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3695 a TPREL one. We use a separate flag rather than setting TPREL
3696 just for convenience in distinguishing the two cases. */
3697 #define TLS_GD 1 /* GD reloc. */
3698 #define TLS_LD 2 /* LD reloc. */
3699 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3700 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3701 #define TLS_TLS 16 /* Any TLS reloc. */
3702 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3703 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3704 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3705 unsigned char tls_mask;
3706 };
3707
3708 /* ppc64 ELF linker hash table. */
3709
3710 struct ppc_link_hash_table
3711 {
3712 struct elf_link_hash_table elf;
3713
3714 /* The stub hash table. */
3715 struct bfd_hash_table stub_hash_table;
3716
3717 /* Another hash table for plt_branch stubs. */
3718 struct bfd_hash_table branch_hash_table;
3719
3720 /* Linker stub bfd. */
3721 bfd *stub_bfd;
3722
3723 /* Linker call-backs. */
3724 asection * (*add_stub_section) (const char *, asection *);
3725 void (*layout_sections_again) (void);
3726
3727 /* Array to keep track of which stub sections have been created, and
3728 information on stub grouping. */
3729 struct map_stub {
3730 /* This is the section to which stubs in the group will be attached. */
3731 asection *link_sec;
3732 /* The stub section. */
3733 asection *stub_sec;
3734 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3735 bfd_vma toc_off;
3736 } *stub_group;
3737
3738 /* Temp used when calculating TOC pointers. */
3739 bfd_vma toc_curr;
3740 bfd *toc_bfd;
3741 asection *toc_first_sec;
3742
3743 /* Highest input section id. */
3744 int top_id;
3745
3746 /* Highest output section index. */
3747 int top_index;
3748
3749 /* Used when adding symbols. */
3750 struct ppc_link_hash_entry *dot_syms;
3751
3752 /* List of input sections for each output section. */
3753 asection **input_list;
3754
3755 /* Short-cuts to get to dynamic linker sections. */
3756 asection *got;
3757 asection *plt;
3758 asection *relplt;
3759 asection *iplt;
3760 asection *reliplt;
3761 asection *dynbss;
3762 asection *relbss;
3763 asection *glink;
3764 asection *sfpr;
3765 asection *brlt;
3766 asection *relbrlt;
3767
3768 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3769 struct ppc_link_hash_entry *tls_get_addr;
3770 struct ppc_link_hash_entry *tls_get_addr_fd;
3771
3772 /* The size of reliplt used by got entry relocs. */
3773 bfd_size_type got_reli_size;
3774
3775 /* Statistics. */
3776 unsigned long stub_count[ppc_stub_plt_call];
3777
3778 /* Number of stubs against global syms. */
3779 unsigned long stub_globals;
3780
3781 /* Set if we should emit symbols for stubs. */
3782 unsigned int emit_stub_syms:1;
3783
3784 /* Set if __tls_get_addr optimization should not be done. */
3785 unsigned int no_tls_get_addr_opt:1;
3786
3787 /* Support for multiple toc sections. */
3788 unsigned int do_multi_toc:1;
3789 unsigned int multi_toc_needed:1;
3790 unsigned int second_toc_pass:1;
3791 unsigned int do_toc_opt:1;
3792
3793 /* Set on error. */
3794 unsigned int stub_error:1;
3795
3796 /* Temp used by ppc64_elf_process_dot_syms. */
3797 unsigned int twiddled_syms:1;
3798
3799 /* Incremented every time we size stubs. */
3800 unsigned int stub_iteration;
3801
3802 /* Small local sym cache. */
3803 struct sym_cache sym_cache;
3804 };
3805
3806 /* Rename some of the generic section flags to better document how they
3807 are used here. */
3808
3809 /* Nonzero if this section has TLS related relocations. */
3810 #define has_tls_reloc sec_flg0
3811
3812 /* Nonzero if this section has a call to __tls_get_addr. */
3813 #define has_tls_get_addr_call sec_flg1
3814
3815 /* Nonzero if this section has any toc or got relocs. */
3816 #define has_toc_reloc sec_flg2
3817
3818 /* Nonzero if this section has a call to another section that uses
3819 the toc or got. */
3820 #define makes_toc_func_call sec_flg3
3821
3822 /* Recursion protection when determining above flag. */
3823 #define call_check_in_progress sec_flg4
3824 #define call_check_done sec_flg5
3825
3826 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3827
3828 #define ppc_hash_table(p) \
3829 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3830 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3831
3832 #define ppc_stub_hash_lookup(table, string, create, copy) \
3833 ((struct ppc_stub_hash_entry *) \
3834 bfd_hash_lookup ((table), (string), (create), (copy)))
3835
3836 #define ppc_branch_hash_lookup(table, string, create, copy) \
3837 ((struct ppc_branch_hash_entry *) \
3838 bfd_hash_lookup ((table), (string), (create), (copy)))
3839
3840 /* Create an entry in the stub hash table. */
3841
3842 static struct bfd_hash_entry *
3843 stub_hash_newfunc (struct bfd_hash_entry *entry,
3844 struct bfd_hash_table *table,
3845 const char *string)
3846 {
3847 /* Allocate the structure if it has not already been allocated by a
3848 subclass. */
3849 if (entry == NULL)
3850 {
3851 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3852 if (entry == NULL)
3853 return entry;
3854 }
3855
3856 /* Call the allocation method of the superclass. */
3857 entry = bfd_hash_newfunc (entry, table, string);
3858 if (entry != NULL)
3859 {
3860 struct ppc_stub_hash_entry *eh;
3861
3862 /* Initialize the local fields. */
3863 eh = (struct ppc_stub_hash_entry *) entry;
3864 eh->stub_type = ppc_stub_none;
3865 eh->stub_sec = NULL;
3866 eh->stub_offset = 0;
3867 eh->target_value = 0;
3868 eh->target_section = NULL;
3869 eh->h = NULL;
3870 eh->id_sec = NULL;
3871 }
3872
3873 return entry;
3874 }
3875
3876 /* Create an entry in the branch hash table. */
3877
3878 static struct bfd_hash_entry *
3879 branch_hash_newfunc (struct bfd_hash_entry *entry,
3880 struct bfd_hash_table *table,
3881 const char *string)
3882 {
3883 /* Allocate the structure if it has not already been allocated by a
3884 subclass. */
3885 if (entry == NULL)
3886 {
3887 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3888 if (entry == NULL)
3889 return entry;
3890 }
3891
3892 /* Call the allocation method of the superclass. */
3893 entry = bfd_hash_newfunc (entry, table, string);
3894 if (entry != NULL)
3895 {
3896 struct ppc_branch_hash_entry *eh;
3897
3898 /* Initialize the local fields. */
3899 eh = (struct ppc_branch_hash_entry *) entry;
3900 eh->offset = 0;
3901 eh->iter = 0;
3902 }
3903
3904 return entry;
3905 }
3906
3907 /* Create an entry in a ppc64 ELF linker hash table. */
3908
3909 static struct bfd_hash_entry *
3910 link_hash_newfunc (struct bfd_hash_entry *entry,
3911 struct bfd_hash_table *table,
3912 const char *string)
3913 {
3914 /* Allocate the structure if it has not already been allocated by a
3915 subclass. */
3916 if (entry == NULL)
3917 {
3918 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3919 if (entry == NULL)
3920 return entry;
3921 }
3922
3923 /* Call the allocation method of the superclass. */
3924 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3925 if (entry != NULL)
3926 {
3927 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3928
3929 memset (&eh->u.stub_cache, 0,
3930 (sizeof (struct ppc_link_hash_entry)
3931 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3932
3933 /* When making function calls, old ABI code references function entry
3934 points (dot symbols), while new ABI code references the function
3935 descriptor symbol. We need to make any combination of reference and
3936 definition work together, without breaking archive linking.
3937
3938 For a defined function "foo" and an undefined call to "bar":
3939 An old object defines "foo" and ".foo", references ".bar" (possibly
3940 "bar" too).
3941 A new object defines "foo" and references "bar".
3942
3943 A new object thus has no problem with its undefined symbols being
3944 satisfied by definitions in an old object. On the other hand, the
3945 old object won't have ".bar" satisfied by a new object.
3946
3947 Keep a list of newly added dot-symbols. */
3948
3949 if (string[0] == '.')
3950 {
3951 struct ppc_link_hash_table *htab;
3952
3953 htab = (struct ppc_link_hash_table *) table;
3954 eh->u.next_dot_sym = htab->dot_syms;
3955 htab->dot_syms = eh;
3956 }
3957 }
3958
3959 return entry;
3960 }
3961
3962 /* Create a ppc64 ELF linker hash table. */
3963
3964 static struct bfd_link_hash_table *
3965 ppc64_elf_link_hash_table_create (bfd *abfd)
3966 {
3967 struct ppc_link_hash_table *htab;
3968 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3969
3970 htab = bfd_zmalloc (amt);
3971 if (htab == NULL)
3972 return NULL;
3973
3974 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3975 sizeof (struct ppc_link_hash_entry),
3976 PPC64_ELF_DATA))
3977 {
3978 free (htab);
3979 return NULL;
3980 }
3981
3982 /* Init the stub hash table too. */
3983 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3984 sizeof (struct ppc_stub_hash_entry)))
3985 return NULL;
3986
3987 /* And the branch hash table. */
3988 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3989 sizeof (struct ppc_branch_hash_entry)))
3990 return NULL;
3991
3992 /* Initializing two fields of the union is just cosmetic. We really
3993 only care about glist, but when compiled on a 32-bit host the
3994 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3995 debugger inspection of these fields look nicer. */
3996 htab->elf.init_got_refcount.refcount = 0;
3997 htab->elf.init_got_refcount.glist = NULL;
3998 htab->elf.init_plt_refcount.refcount = 0;
3999 htab->elf.init_plt_refcount.glist = NULL;
4000 htab->elf.init_got_offset.offset = 0;
4001 htab->elf.init_got_offset.glist = NULL;
4002 htab->elf.init_plt_offset.offset = 0;
4003 htab->elf.init_plt_offset.glist = NULL;
4004
4005 return &htab->elf.root;
4006 }
4007
4008 /* Free the derived linker hash table. */
4009
4010 static void
4011 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4012 {
4013 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4014
4015 bfd_hash_table_free (&ret->stub_hash_table);
4016 bfd_hash_table_free (&ret->branch_hash_table);
4017 _bfd_generic_link_hash_table_free (hash);
4018 }
4019
4020 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4021
4022 void
4023 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4024 {
4025 struct ppc_link_hash_table *htab;
4026
4027 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4028
4029 /* Always hook our dynamic sections into the first bfd, which is the
4030 linker created stub bfd. This ensures that the GOT header is at
4031 the start of the output TOC section. */
4032 htab = ppc_hash_table (info);
4033 if (htab == NULL)
4034 return;
4035 htab->stub_bfd = abfd;
4036 htab->elf.dynobj = abfd;
4037 }
4038
4039 /* Build a name for an entry in the stub hash table. */
4040
4041 static char *
4042 ppc_stub_name (const asection *input_section,
4043 const asection *sym_sec,
4044 const struct ppc_link_hash_entry *h,
4045 const Elf_Internal_Rela *rel)
4046 {
4047 char *stub_name;
4048 bfd_size_type len;
4049
4050 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4051 offsets from a sym as a branch target? In fact, we could
4052 probably assume the addend is always zero. */
4053 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4054
4055 if (h)
4056 {
4057 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4058 stub_name = bfd_malloc (len);
4059 if (stub_name == NULL)
4060 return stub_name;
4061
4062 sprintf (stub_name, "%08x.%s+%x",
4063 input_section->id & 0xffffffff,
4064 h->elf.root.root.string,
4065 (int) rel->r_addend & 0xffffffff);
4066 }
4067 else
4068 {
4069 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4070 stub_name = bfd_malloc (len);
4071 if (stub_name == NULL)
4072 return stub_name;
4073
4074 sprintf (stub_name, "%08x.%x:%x+%x",
4075 input_section->id & 0xffffffff,
4076 sym_sec->id & 0xffffffff,
4077 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4078 (int) rel->r_addend & 0xffffffff);
4079 }
4080 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4081 stub_name[len - 2] = 0;
4082 return stub_name;
4083 }
4084
4085 /* Look up an entry in the stub hash. Stub entries are cached because
4086 creating the stub name takes a bit of time. */
4087
4088 static struct ppc_stub_hash_entry *
4089 ppc_get_stub_entry (const asection *input_section,
4090 const asection *sym_sec,
4091 struct ppc_link_hash_entry *h,
4092 const Elf_Internal_Rela *rel,
4093 struct ppc_link_hash_table *htab)
4094 {
4095 struct ppc_stub_hash_entry *stub_entry;
4096 const asection *id_sec;
4097
4098 /* If this input section is part of a group of sections sharing one
4099 stub section, then use the id of the first section in the group.
4100 Stub names need to include a section id, as there may well be
4101 more than one stub used to reach say, printf, and we need to
4102 distinguish between them. */
4103 id_sec = htab->stub_group[input_section->id].link_sec;
4104
4105 if (h != NULL && h->u.stub_cache != NULL
4106 && h->u.stub_cache->h == h
4107 && h->u.stub_cache->id_sec == id_sec)
4108 {
4109 stub_entry = h->u.stub_cache;
4110 }
4111 else
4112 {
4113 char *stub_name;
4114
4115 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4116 if (stub_name == NULL)
4117 return NULL;
4118
4119 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4120 stub_name, FALSE, FALSE);
4121 if (h != NULL)
4122 h->u.stub_cache = stub_entry;
4123
4124 free (stub_name);
4125 }
4126
4127 return stub_entry;
4128 }
4129
4130 /* Add a new stub entry to the stub hash. Not all fields of the new
4131 stub entry are initialised. */
4132
4133 static struct ppc_stub_hash_entry *
4134 ppc_add_stub (const char *stub_name,
4135 asection *section,
4136 struct ppc_link_hash_table *htab)
4137 {
4138 asection *link_sec;
4139 asection *stub_sec;
4140 struct ppc_stub_hash_entry *stub_entry;
4141
4142 link_sec = htab->stub_group[section->id].link_sec;
4143 stub_sec = htab->stub_group[section->id].stub_sec;
4144 if (stub_sec == NULL)
4145 {
4146 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4147 if (stub_sec == NULL)
4148 {
4149 size_t namelen;
4150 bfd_size_type len;
4151 char *s_name;
4152
4153 namelen = strlen (link_sec->name);
4154 len = namelen + sizeof (STUB_SUFFIX);
4155 s_name = bfd_alloc (htab->stub_bfd, len);
4156 if (s_name == NULL)
4157 return NULL;
4158
4159 memcpy (s_name, link_sec->name, namelen);
4160 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4161 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4162 if (stub_sec == NULL)
4163 return NULL;
4164 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4165 }
4166 htab->stub_group[section->id].stub_sec = stub_sec;
4167 }
4168
4169 /* Enter this entry into the linker stub hash table. */
4170 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4171 TRUE, FALSE);
4172 if (stub_entry == NULL)
4173 {
4174 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4175 section->owner, stub_name);
4176 return NULL;
4177 }
4178
4179 stub_entry->stub_sec = stub_sec;
4180 stub_entry->stub_offset = 0;
4181 stub_entry->id_sec = link_sec;
4182 return stub_entry;
4183 }
4184
4185 /* Create sections for linker generated code. */
4186
4187 static bfd_boolean
4188 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4189 {
4190 struct ppc_link_hash_table *htab;
4191 flagword flags;
4192
4193 htab = ppc_hash_table (info);
4194 if (htab == NULL)
4195 return FALSE;
4196
4197 /* Create .sfpr for code to save and restore fp regs. */
4198 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4199 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4200 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4201 flags);
4202 if (htab->sfpr == NULL
4203 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4204 return FALSE;
4205
4206 /* Create .glink for lazy dynamic linking support. */
4207 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4208 flags);
4209 if (htab->glink == NULL
4210 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4211 return FALSE;
4212
4213 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4214 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4215 if (htab->iplt == NULL
4216 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4217 return FALSE;
4218
4219 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4220 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4221 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4222 ".rela.iplt",
4223 flags);
4224 if (htab->reliplt == NULL
4225 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4226 return FALSE;
4227
4228 /* Create branch lookup table for plt_branch stubs. */
4229 flags = (SEC_ALLOC | SEC_LOAD
4230 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4231 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4232 flags);
4233 if (htab->brlt == NULL
4234 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4235 return FALSE;
4236
4237 if (!info->shared)
4238 return TRUE;
4239
4240 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4241 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4242 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4243 ".rela.branch_lt",
4244 flags);
4245 if (htab->relbrlt == NULL
4246 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4247 return FALSE;
4248
4249 return TRUE;
4250 }
4251
4252 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4253 not already done. */
4254
4255 static bfd_boolean
4256 create_got_section (bfd *abfd, struct bfd_link_info *info)
4257 {
4258 asection *got, *relgot;
4259 flagword flags;
4260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4261
4262 if (!is_ppc64_elf (abfd))
4263 return FALSE;
4264 if (htab == NULL)
4265 return FALSE;
4266
4267 if (!htab->got)
4268 {
4269 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4270 return FALSE;
4271
4272 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4273 if (!htab->got)
4274 abort ();
4275 }
4276
4277 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4278 | SEC_LINKER_CREATED);
4279
4280 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4281 if (!got
4282 || !bfd_set_section_alignment (abfd, got, 3))
4283 return FALSE;
4284
4285 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4286 flags | SEC_READONLY);
4287 if (!relgot
4288 || ! bfd_set_section_alignment (abfd, relgot, 3))
4289 return FALSE;
4290
4291 ppc64_elf_tdata (abfd)->got = got;
4292 ppc64_elf_tdata (abfd)->relgot = relgot;
4293 return TRUE;
4294 }
4295
4296 /* Create the dynamic sections, and set up shortcuts. */
4297
4298 static bfd_boolean
4299 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4300 {
4301 struct ppc_link_hash_table *htab;
4302
4303 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4304 return FALSE;
4305
4306 htab = ppc_hash_table (info);
4307 if (htab == NULL)
4308 return FALSE;
4309
4310 if (!htab->got)
4311 htab->got = bfd_get_section_by_name (dynobj, ".got");
4312 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4313 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4314 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4315 if (!info->shared)
4316 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4317
4318 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4319 || (!info->shared && !htab->relbss))
4320 abort ();
4321
4322 return TRUE;
4323 }
4324
4325 /* Follow indirect and warning symbol links. */
4326
4327 static inline struct bfd_link_hash_entry *
4328 follow_link (struct bfd_link_hash_entry *h)
4329 {
4330 while (h->type == bfd_link_hash_indirect
4331 || h->type == bfd_link_hash_warning)
4332 h = h->u.i.link;
4333 return h;
4334 }
4335
4336 static inline struct elf_link_hash_entry *
4337 elf_follow_link (struct elf_link_hash_entry *h)
4338 {
4339 return (struct elf_link_hash_entry *) follow_link (&h->root);
4340 }
4341
4342 static inline struct ppc_link_hash_entry *
4343 ppc_follow_link (struct ppc_link_hash_entry *h)
4344 {
4345 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4346 }
4347
4348 /* Merge PLT info on FROM with that on TO. */
4349
4350 static void
4351 move_plt_plist (struct ppc_link_hash_entry *from,
4352 struct ppc_link_hash_entry *to)
4353 {
4354 if (from->elf.plt.plist != NULL)
4355 {
4356 if (to->elf.plt.plist != NULL)
4357 {
4358 struct plt_entry **entp;
4359 struct plt_entry *ent;
4360
4361 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4362 {
4363 struct plt_entry *dent;
4364
4365 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4366 if (dent->addend == ent->addend)
4367 {
4368 dent->plt.refcount += ent->plt.refcount;
4369 *entp = ent->next;
4370 break;
4371 }
4372 if (dent == NULL)
4373 entp = &ent->next;
4374 }
4375 *entp = to->elf.plt.plist;
4376 }
4377
4378 to->elf.plt.plist = from->elf.plt.plist;
4379 from->elf.plt.plist = NULL;
4380 }
4381 }
4382
4383 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4384
4385 static void
4386 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4387 struct elf_link_hash_entry *dir,
4388 struct elf_link_hash_entry *ind)
4389 {
4390 struct ppc_link_hash_entry *edir, *eind;
4391
4392 edir = (struct ppc_link_hash_entry *) dir;
4393 eind = (struct ppc_link_hash_entry *) ind;
4394
4395 /* Copy over any dynamic relocs we may have on the indirect sym. */
4396 if (eind->dyn_relocs != NULL)
4397 {
4398 if (edir->dyn_relocs != NULL)
4399 {
4400 struct ppc_dyn_relocs **pp;
4401 struct ppc_dyn_relocs *p;
4402
4403 /* Add reloc counts against the indirect sym to the direct sym
4404 list. Merge any entries against the same section. */
4405 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4406 {
4407 struct ppc_dyn_relocs *q;
4408
4409 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4410 if (q->sec == p->sec)
4411 {
4412 q->pc_count += p->pc_count;
4413 q->count += p->count;
4414 *pp = p->next;
4415 break;
4416 }
4417 if (q == NULL)
4418 pp = &p->next;
4419 }
4420 *pp = edir->dyn_relocs;
4421 }
4422
4423 edir->dyn_relocs = eind->dyn_relocs;
4424 eind->dyn_relocs = NULL;
4425 }
4426
4427 edir->is_func |= eind->is_func;
4428 edir->is_func_descriptor |= eind->is_func_descriptor;
4429 edir->tls_mask |= eind->tls_mask;
4430 if (eind->oh != NULL)
4431 edir->oh = ppc_follow_link (eind->oh);
4432
4433 /* If called to transfer flags for a weakdef during processing
4434 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4435 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4436 if (!(ELIMINATE_COPY_RELOCS
4437 && eind->elf.root.type != bfd_link_hash_indirect
4438 && edir->elf.dynamic_adjusted))
4439 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4440
4441 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4442 edir->elf.ref_regular |= eind->elf.ref_regular;
4443 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4444 edir->elf.needs_plt |= eind->elf.needs_plt;
4445
4446 /* If we were called to copy over info for a weak sym, that's all. */
4447 if (eind->elf.root.type != bfd_link_hash_indirect)
4448 return;
4449
4450 /* Copy over got entries that we may have already seen to the
4451 symbol which just became indirect. */
4452 if (eind->elf.got.glist != NULL)
4453 {
4454 if (edir->elf.got.glist != NULL)
4455 {
4456 struct got_entry **entp;
4457 struct got_entry *ent;
4458
4459 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4460 {
4461 struct got_entry *dent;
4462
4463 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4464 if (dent->addend == ent->addend
4465 && dent->owner == ent->owner
4466 && dent->tls_type == ent->tls_type)
4467 {
4468 dent->got.refcount += ent->got.refcount;
4469 *entp = ent->next;
4470 break;
4471 }
4472 if (dent == NULL)
4473 entp = &ent->next;
4474 }
4475 *entp = edir->elf.got.glist;
4476 }
4477
4478 edir->elf.got.glist = eind->elf.got.glist;
4479 eind->elf.got.glist = NULL;
4480 }
4481
4482 /* And plt entries. */
4483 move_plt_plist (eind, edir);
4484
4485 if (eind->elf.dynindx != -1)
4486 {
4487 if (edir->elf.dynindx != -1)
4488 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4489 edir->elf.dynstr_index);
4490 edir->elf.dynindx = eind->elf.dynindx;
4491 edir->elf.dynstr_index = eind->elf.dynstr_index;
4492 eind->elf.dynindx = -1;
4493 eind->elf.dynstr_index = 0;
4494 }
4495 }
4496
4497 /* Find the function descriptor hash entry from the given function code
4498 hash entry FH. Link the entries via their OH fields. */
4499
4500 static struct ppc_link_hash_entry *
4501 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4502 {
4503 struct ppc_link_hash_entry *fdh = fh->oh;
4504
4505 if (fdh == NULL)
4506 {
4507 const char *fd_name = fh->elf.root.root.string + 1;
4508
4509 fdh = (struct ppc_link_hash_entry *)
4510 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4511 if (fdh == NULL)
4512 return fdh;
4513
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 }
4519
4520 return ppc_follow_link (fdh);
4521 }
4522
4523 /* Make a fake function descriptor sym for the code sym FH. */
4524
4525 static struct ppc_link_hash_entry *
4526 make_fdh (struct bfd_link_info *info,
4527 struct ppc_link_hash_entry *fh)
4528 {
4529 bfd *abfd;
4530 asymbol *newsym;
4531 struct bfd_link_hash_entry *bh;
4532 struct ppc_link_hash_entry *fdh;
4533
4534 abfd = fh->elf.root.u.undef.abfd;
4535 newsym = bfd_make_empty_symbol (abfd);
4536 newsym->name = fh->elf.root.root.string + 1;
4537 newsym->section = bfd_und_section_ptr;
4538 newsym->value = 0;
4539 newsym->flags = BSF_WEAK;
4540
4541 bh = NULL;
4542 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4543 newsym->flags, newsym->section,
4544 newsym->value, NULL, FALSE, FALSE,
4545 &bh))
4546 return NULL;
4547
4548 fdh = (struct ppc_link_hash_entry *) bh;
4549 fdh->elf.non_elf = 0;
4550 fdh->fake = 1;
4551 fdh->is_func_descriptor = 1;
4552 fdh->oh = fh;
4553 fh->is_func = 1;
4554 fh->oh = fdh;
4555 return fdh;
4556 }
4557
4558 /* Fix function descriptor symbols defined in .opd sections to be
4559 function type. */
4560
4561 static bfd_boolean
4562 ppc64_elf_add_symbol_hook (bfd *ibfd,
4563 struct bfd_link_info *info,
4564 Elf_Internal_Sym *isym,
4565 const char **name ATTRIBUTE_UNUSED,
4566 flagword *flags ATTRIBUTE_UNUSED,
4567 asection **sec,
4568 bfd_vma *value ATTRIBUTE_UNUSED)
4569 {
4570 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4571 {
4572 if ((ibfd->flags & DYNAMIC) == 0)
4573 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4574 }
4575 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4576 ;
4577 else if (*sec != NULL
4578 && strcmp ((*sec)->name, ".opd") == 0)
4579 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4580
4581 return TRUE;
4582 }
4583
4584 /* This function makes an old ABI object reference to ".bar" cause the
4585 inclusion of a new ABI object archive that defines "bar".
4586 NAME is a symbol defined in an archive. Return a symbol in the hash
4587 table that might be satisfied by the archive symbols. */
4588
4589 static struct elf_link_hash_entry *
4590 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4591 struct bfd_link_info *info,
4592 const char *name)
4593 {
4594 struct elf_link_hash_entry *h;
4595 char *dot_name;
4596 size_t len;
4597
4598 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4599 if (h != NULL
4600 /* Don't return this sym if it is a fake function descriptor
4601 created by add_symbol_adjust. */
4602 && !(h->root.type == bfd_link_hash_undefweak
4603 && ((struct ppc_link_hash_entry *) h)->fake))
4604 return h;
4605
4606 if (name[0] == '.')
4607 return h;
4608
4609 len = strlen (name);
4610 dot_name = bfd_alloc (abfd, len + 2);
4611 if (dot_name == NULL)
4612 return (struct elf_link_hash_entry *) 0 - 1;
4613 dot_name[0] = '.';
4614 memcpy (dot_name + 1, name, len + 1);
4615 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4616 bfd_release (abfd, dot_name);
4617 return h;
4618 }
4619
4620 /* This function satisfies all old ABI object references to ".bar" if a
4621 new ABI object defines "bar". Well, at least, undefined dot symbols
4622 are made weak. This stops later archive searches from including an
4623 object if we already have a function descriptor definition. It also
4624 prevents the linker complaining about undefined symbols.
4625 We also check and correct mismatched symbol visibility here. The
4626 most restrictive visibility of the function descriptor and the
4627 function entry symbol is used. */
4628
4629 static bfd_boolean
4630 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4631 {
4632 struct ppc_link_hash_table *htab;
4633 struct ppc_link_hash_entry *fdh;
4634
4635 if (eh->elf.root.type == bfd_link_hash_indirect)
4636 return TRUE;
4637
4638 if (eh->elf.root.type == bfd_link_hash_warning)
4639 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4640
4641 if (eh->elf.root.root.string[0] != '.')
4642 abort ();
4643
4644 htab = ppc_hash_table (info);
4645 if (htab == NULL)
4646 return FALSE;
4647
4648 fdh = lookup_fdh (eh, htab);
4649 if (fdh == NULL)
4650 {
4651 if (!info->relocatable
4652 && (eh->elf.root.type == bfd_link_hash_undefined
4653 || eh->elf.root.type == bfd_link_hash_undefweak)
4654 && eh->elf.ref_regular)
4655 {
4656 /* Make an undefweak function descriptor sym, which is enough to
4657 pull in an --as-needed shared lib, but won't cause link
4658 errors. Archives are handled elsewhere. */
4659 fdh = make_fdh (info, eh);
4660 if (fdh == NULL)
4661 return FALSE;
4662 fdh->elf.ref_regular = 1;
4663 }
4664 }
4665 else
4666 {
4667 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4668 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4669 if (entry_vis < descr_vis)
4670 fdh->elf.other += entry_vis - descr_vis;
4671 else if (entry_vis > descr_vis)
4672 eh->elf.other += descr_vis - entry_vis;
4673
4674 if ((fdh->elf.root.type == bfd_link_hash_defined
4675 || fdh->elf.root.type == bfd_link_hash_defweak)
4676 && eh->elf.root.type == bfd_link_hash_undefined)
4677 {
4678 eh->elf.root.type = bfd_link_hash_undefweak;
4679 eh->was_undefined = 1;
4680 htab->twiddled_syms = 1;
4681 }
4682 }
4683
4684 return TRUE;
4685 }
4686
4687 /* Process list of dot-symbols we made in link_hash_newfunc. */
4688
4689 static bfd_boolean
4690 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4691 {
4692 struct ppc_link_hash_table *htab;
4693 struct ppc_link_hash_entry **p, *eh;
4694
4695 if (!is_ppc64_elf (info->output_bfd))
4696 return TRUE;
4697 htab = ppc_hash_table (info);
4698 if (htab == NULL)
4699 return FALSE;
4700
4701 if (is_ppc64_elf (ibfd))
4702 {
4703 p = &htab->dot_syms;
4704 while ((eh = *p) != NULL)
4705 {
4706 *p = NULL;
4707 if (!add_symbol_adjust (eh, info))
4708 return FALSE;
4709 p = &eh->u.next_dot_sym;
4710 }
4711 }
4712
4713 /* Clear the list for non-ppc64 input files. */
4714 p = &htab->dot_syms;
4715 while ((eh = *p) != NULL)
4716 {
4717 *p = NULL;
4718 p = &eh->u.next_dot_sym;
4719 }
4720
4721 /* We need to fix the undefs list for any syms we have twiddled to
4722 undef_weak. */
4723 if (htab->twiddled_syms)
4724 {
4725 bfd_link_repair_undef_list (&htab->elf.root);
4726 htab->twiddled_syms = 0;
4727 }
4728 return TRUE;
4729 }
4730
4731 /* Undo hash table changes when an --as-needed input file is determined
4732 not to be needed. */
4733
4734 static bfd_boolean
4735 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4736 struct bfd_link_info *info)
4737 {
4738 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4739
4740 if (htab == NULL)
4741 return FALSE;
4742
4743 htab->dot_syms = NULL;
4744 return TRUE;
4745 }
4746
4747 static struct plt_entry **
4748 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4749 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4750 {
4751 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4752 struct plt_entry **local_plt;
4753 unsigned char *local_got_tls_masks;
4754
4755 if (local_got_ents == NULL)
4756 {
4757 bfd_size_type size = symtab_hdr->sh_info;
4758
4759 size *= (sizeof (*local_got_ents)
4760 + sizeof (*local_plt)
4761 + sizeof (*local_got_tls_masks));
4762 local_got_ents = bfd_zalloc (abfd, size);
4763 if (local_got_ents == NULL)
4764 return NULL;
4765 elf_local_got_ents (abfd) = local_got_ents;
4766 }
4767
4768 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4769 {
4770 struct got_entry *ent;
4771
4772 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4773 if (ent->addend == r_addend
4774 && ent->owner == abfd
4775 && ent->tls_type == tls_type)
4776 break;
4777 if (ent == NULL)
4778 {
4779 bfd_size_type amt = sizeof (*ent);
4780 ent = bfd_alloc (abfd, amt);
4781 if (ent == NULL)
4782 return FALSE;
4783 ent->next = local_got_ents[r_symndx];
4784 ent->addend = r_addend;
4785 ent->owner = abfd;
4786 ent->tls_type = tls_type;
4787 ent->is_indirect = FALSE;
4788 ent->got.refcount = 0;
4789 local_got_ents[r_symndx] = ent;
4790 }
4791 ent->got.refcount += 1;
4792 }
4793
4794 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4795 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4796 local_got_tls_masks[r_symndx] |= tls_type;
4797
4798 return local_plt + r_symndx;
4799 }
4800
4801 static bfd_boolean
4802 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4803 {
4804 struct plt_entry *ent;
4805
4806 for (ent = *plist; ent != NULL; ent = ent->next)
4807 if (ent->addend == addend)
4808 break;
4809 if (ent == NULL)
4810 {
4811 bfd_size_type amt = sizeof (*ent);
4812 ent = bfd_alloc (abfd, amt);
4813 if (ent == NULL)
4814 return FALSE;
4815 ent->next = *plist;
4816 ent->addend = addend;
4817 ent->plt.refcount = 0;
4818 *plist = ent;
4819 }
4820 ent->plt.refcount += 1;
4821 return TRUE;
4822 }
4823
4824 static bfd_boolean
4825 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4826 {
4827 return (r_type == R_PPC64_REL24
4828 || r_type == R_PPC64_REL14
4829 || r_type == R_PPC64_REL14_BRTAKEN
4830 || r_type == R_PPC64_REL14_BRNTAKEN
4831 || r_type == R_PPC64_ADDR24
4832 || r_type == R_PPC64_ADDR14
4833 || r_type == R_PPC64_ADDR14_BRTAKEN
4834 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4835 }
4836
4837 /* Look through the relocs for a section during the first phase, and
4838 calculate needed space in the global offset table, procedure
4839 linkage table, and dynamic reloc sections. */
4840
4841 static bfd_boolean
4842 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4843 asection *sec, const Elf_Internal_Rela *relocs)
4844 {
4845 struct ppc_link_hash_table *htab;
4846 Elf_Internal_Shdr *symtab_hdr;
4847 struct elf_link_hash_entry **sym_hashes;
4848 const Elf_Internal_Rela *rel;
4849 const Elf_Internal_Rela *rel_end;
4850 asection *sreloc;
4851 asection **opd_sym_map;
4852 struct elf_link_hash_entry *tga, *dottga;
4853
4854 if (info->relocatable)
4855 return TRUE;
4856
4857 /* Don't do anything special with non-loaded, non-alloced sections.
4858 In particular, any relocs in such sections should not affect GOT
4859 and PLT reference counting (ie. we don't allow them to create GOT
4860 or PLT entries), there's no possibility or desire to optimize TLS
4861 relocs, and there's not much point in propagating relocs to shared
4862 libs that the dynamic linker won't relocate. */
4863 if ((sec->flags & SEC_ALLOC) == 0)
4864 return TRUE;
4865
4866 BFD_ASSERT (is_ppc64_elf (abfd));
4867
4868 htab = ppc_hash_table (info);
4869 if (htab == NULL)
4870 return FALSE;
4871
4872 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4873 FALSE, FALSE, TRUE);
4874 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4875 FALSE, FALSE, TRUE);
4876 symtab_hdr = &elf_symtab_hdr (abfd);
4877 sym_hashes = elf_sym_hashes (abfd);
4878 sreloc = NULL;
4879 opd_sym_map = NULL;
4880 if (strcmp (sec->name, ".opd") == 0)
4881 {
4882 /* Garbage collection needs some extra help with .opd sections.
4883 We don't want to necessarily keep everything referenced by
4884 relocs in .opd, as that would keep all functions. Instead,
4885 if we reference an .opd symbol (a function descriptor), we
4886 want to keep the function code symbol's section. This is
4887 easy for global symbols, but for local syms we need to keep
4888 information about the associated function section. */
4889 bfd_size_type amt;
4890
4891 amt = sec->size * sizeof (*opd_sym_map) / 8;
4892 opd_sym_map = bfd_zalloc (abfd, amt);
4893 if (opd_sym_map == NULL)
4894 return FALSE;
4895 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4896 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4897 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4898 }
4899
4900 if (htab->sfpr == NULL
4901 && !create_linkage_sections (htab->elf.dynobj, info))
4902 return FALSE;
4903
4904 rel_end = relocs + sec->reloc_count;
4905 for (rel = relocs; rel < rel_end; rel++)
4906 {
4907 unsigned long r_symndx;
4908 struct elf_link_hash_entry *h;
4909 enum elf_ppc64_reloc_type r_type;
4910 int tls_type;
4911 struct _ppc64_elf_section_data *ppc64_sec;
4912 struct plt_entry **ifunc;
4913
4914 r_symndx = ELF64_R_SYM (rel->r_info);
4915 if (r_symndx < symtab_hdr->sh_info)
4916 h = NULL;
4917 else
4918 {
4919 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4920 h = elf_follow_link (h);
4921 }
4922
4923 tls_type = 0;
4924 ifunc = NULL;
4925 if (h != NULL)
4926 {
4927 if (h->type == STT_GNU_IFUNC)
4928 {
4929 h->needs_plt = 1;
4930 ifunc = &h->plt.plist;
4931 }
4932 }
4933 else
4934 {
4935 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4936 abfd, r_symndx);
4937 if (isym == NULL)
4938 return FALSE;
4939
4940 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4941 {
4942 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4943 rel->r_addend, PLT_IFUNC);
4944 if (ifunc == NULL)
4945 return FALSE;
4946 }
4947 }
4948 r_type = ELF64_R_TYPE (rel->r_info);
4949 if (is_branch_reloc (r_type))
4950 {
4951 if (h != NULL && (h == tga || h == dottga))
4952 {
4953 if (rel != relocs
4954 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4955 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4956 /* We have a new-style __tls_get_addr call with a marker
4957 reloc. */
4958 ;
4959 else
4960 /* Mark this section as having an old-style call. */
4961 sec->has_tls_get_addr_call = 1;
4962 }
4963
4964 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4965 if (ifunc != NULL
4966 && !update_plt_info (abfd, ifunc, rel->r_addend))
4967 return FALSE;
4968 }
4969
4970 switch (r_type)
4971 {
4972 case R_PPC64_TLSGD:
4973 case R_PPC64_TLSLD:
4974 /* These special tls relocs tie a call to __tls_get_addr with
4975 its parameter symbol. */
4976 break;
4977
4978 case R_PPC64_GOT_TLSLD16:
4979 case R_PPC64_GOT_TLSLD16_LO:
4980 case R_PPC64_GOT_TLSLD16_HI:
4981 case R_PPC64_GOT_TLSLD16_HA:
4982 tls_type = TLS_TLS | TLS_LD;
4983 goto dogottls;
4984
4985 case R_PPC64_GOT_TLSGD16:
4986 case R_PPC64_GOT_TLSGD16_LO:
4987 case R_PPC64_GOT_TLSGD16_HI:
4988 case R_PPC64_GOT_TLSGD16_HA:
4989 tls_type = TLS_TLS | TLS_GD;
4990 goto dogottls;
4991
4992 case R_PPC64_GOT_TPREL16_DS:
4993 case R_PPC64_GOT_TPREL16_LO_DS:
4994 case R_PPC64_GOT_TPREL16_HI:
4995 case R_PPC64_GOT_TPREL16_HA:
4996 if (!info->executable)
4997 info->flags |= DF_STATIC_TLS;
4998 tls_type = TLS_TLS | TLS_TPREL;
4999 goto dogottls;
5000
5001 case R_PPC64_GOT_DTPREL16_DS:
5002 case R_PPC64_GOT_DTPREL16_LO_DS:
5003 case R_PPC64_GOT_DTPREL16_HI:
5004 case R_PPC64_GOT_DTPREL16_HA:
5005 tls_type = TLS_TLS | TLS_DTPREL;
5006 dogottls:
5007 sec->has_tls_reloc = 1;
5008 /* Fall thru */
5009
5010 case R_PPC64_GOT16:
5011 case R_PPC64_GOT16_DS:
5012 case R_PPC64_GOT16_HA:
5013 case R_PPC64_GOT16_HI:
5014 case R_PPC64_GOT16_LO:
5015 case R_PPC64_GOT16_LO_DS:
5016 /* This symbol requires a global offset table entry. */
5017 sec->has_toc_reloc = 1;
5018 if (r_type == R_PPC64_GOT_TLSLD16
5019 || r_type == R_PPC64_GOT_TLSGD16
5020 || r_type == R_PPC64_GOT_TPREL16_DS
5021 || r_type == R_PPC64_GOT_DTPREL16_DS
5022 || r_type == R_PPC64_GOT16
5023 || r_type == R_PPC64_GOT16_DS)
5024 {
5025 htab->do_multi_toc = 1;
5026 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5027 }
5028
5029 if (ppc64_elf_tdata (abfd)->got == NULL
5030 && !create_got_section (abfd, info))
5031 return FALSE;
5032
5033 if (h != NULL)
5034 {
5035 struct ppc_link_hash_entry *eh;
5036 struct got_entry *ent;
5037
5038 eh = (struct ppc_link_hash_entry *) h;
5039 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5040 if (ent->addend == rel->r_addend
5041 && ent->owner == abfd
5042 && ent->tls_type == tls_type)
5043 break;
5044 if (ent == NULL)
5045 {
5046 bfd_size_type amt = sizeof (*ent);
5047 ent = bfd_alloc (abfd, amt);
5048 if (ent == NULL)
5049 return FALSE;
5050 ent->next = eh->elf.got.glist;
5051 ent->addend = rel->r_addend;
5052 ent->owner = abfd;
5053 ent->tls_type = tls_type;
5054 ent->is_indirect = FALSE;
5055 ent->got.refcount = 0;
5056 eh->elf.got.glist = ent;
5057 }
5058 ent->got.refcount += 1;
5059 eh->tls_mask |= tls_type;
5060 }
5061 else
5062 /* This is a global offset table entry for a local symbol. */
5063 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5064 rel->r_addend, tls_type))
5065 return FALSE;
5066 break;
5067
5068 case R_PPC64_PLT16_HA:
5069 case R_PPC64_PLT16_HI:
5070 case R_PPC64_PLT16_LO:
5071 case R_PPC64_PLT32:
5072 case R_PPC64_PLT64:
5073 /* This symbol requires a procedure linkage table entry. We
5074 actually build the entry in adjust_dynamic_symbol,
5075 because this might be a case of linking PIC code without
5076 linking in any dynamic objects, in which case we don't
5077 need to generate a procedure linkage table after all. */
5078 if (h == NULL)
5079 {
5080 /* It does not make sense to have a procedure linkage
5081 table entry for a local symbol. */
5082 bfd_set_error (bfd_error_bad_value);
5083 return FALSE;
5084 }
5085 else
5086 {
5087 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5088 return FALSE;
5089 h->needs_plt = 1;
5090 if (h->root.root.string[0] == '.'
5091 && h->root.root.string[1] != '\0')
5092 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5093 }
5094 break;
5095
5096 /* The following relocations don't need to propagate the
5097 relocation if linking a shared object since they are
5098 section relative. */
5099 case R_PPC64_SECTOFF:
5100 case R_PPC64_SECTOFF_LO:
5101 case R_PPC64_SECTOFF_HI:
5102 case R_PPC64_SECTOFF_HA:
5103 case R_PPC64_SECTOFF_DS:
5104 case R_PPC64_SECTOFF_LO_DS:
5105 case R_PPC64_DTPREL16:
5106 case R_PPC64_DTPREL16_LO:
5107 case R_PPC64_DTPREL16_HI:
5108 case R_PPC64_DTPREL16_HA:
5109 case R_PPC64_DTPREL16_DS:
5110 case R_PPC64_DTPREL16_LO_DS:
5111 case R_PPC64_DTPREL16_HIGHER:
5112 case R_PPC64_DTPREL16_HIGHERA:
5113 case R_PPC64_DTPREL16_HIGHEST:
5114 case R_PPC64_DTPREL16_HIGHESTA:
5115 break;
5116
5117 /* Nor do these. */
5118 case R_PPC64_REL16:
5119 case R_PPC64_REL16_LO:
5120 case R_PPC64_REL16_HI:
5121 case R_PPC64_REL16_HA:
5122 break;
5123
5124 case R_PPC64_TOC16:
5125 case R_PPC64_TOC16_DS:
5126 htab->do_multi_toc = 1;
5127 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5128 case R_PPC64_TOC16_LO:
5129 case R_PPC64_TOC16_HI:
5130 case R_PPC64_TOC16_HA:
5131 case R_PPC64_TOC16_LO_DS:
5132 sec->has_toc_reloc = 1;
5133 break;
5134
5135 /* This relocation describes the C++ object vtable hierarchy.
5136 Reconstruct it for later use during GC. */
5137 case R_PPC64_GNU_VTINHERIT:
5138 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5139 return FALSE;
5140 break;
5141
5142 /* This relocation describes which C++ vtable entries are actually
5143 used. Record for later use during GC. */
5144 case R_PPC64_GNU_VTENTRY:
5145 BFD_ASSERT (h != NULL);
5146 if (h != NULL
5147 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5148 return FALSE;
5149 break;
5150
5151 case R_PPC64_REL14:
5152 case R_PPC64_REL14_BRTAKEN:
5153 case R_PPC64_REL14_BRNTAKEN:
5154 {
5155 asection *dest = NULL;
5156
5157 /* Heuristic: If jumping outside our section, chances are
5158 we are going to need a stub. */
5159 if (h != NULL)
5160 {
5161 /* If the sym is weak it may be overridden later, so
5162 don't assume we know where a weak sym lives. */
5163 if (h->root.type == bfd_link_hash_defined)
5164 dest = h->root.u.def.section;
5165 }
5166 else
5167 {
5168 Elf_Internal_Sym *isym;
5169
5170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5171 abfd, r_symndx);
5172 if (isym == NULL)
5173 return FALSE;
5174
5175 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5176 }
5177
5178 if (dest != sec)
5179 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5180 }
5181 /* Fall through. */
5182
5183 case R_PPC64_REL24:
5184 if (h != NULL && ifunc == NULL)
5185 {
5186 /* We may need a .plt entry if the function this reloc
5187 refers to is in a shared lib. */
5188 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5189 return FALSE;
5190 h->needs_plt = 1;
5191 if (h->root.root.string[0] == '.'
5192 && h->root.root.string[1] != '\0')
5193 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5194 if (h == tga || h == dottga)
5195 sec->has_tls_reloc = 1;
5196 }
5197 break;
5198
5199 case R_PPC64_TPREL64:
5200 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5201 if (!info->executable)
5202 info->flags |= DF_STATIC_TLS;
5203 goto dotlstoc;
5204
5205 case R_PPC64_DTPMOD64:
5206 if (rel + 1 < rel_end
5207 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5208 && rel[1].r_offset == rel->r_offset + 8)
5209 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5210 else
5211 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5212 goto dotlstoc;
5213
5214 case R_PPC64_DTPREL64:
5215 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5216 if (rel != relocs
5217 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5218 && rel[-1].r_offset == rel->r_offset - 8)
5219 /* This is the second reloc of a dtpmod, dtprel pair.
5220 Don't mark with TLS_DTPREL. */
5221 goto dodyn;
5222
5223 dotlstoc:
5224 sec->has_tls_reloc = 1;
5225 if (h != NULL)
5226 {
5227 struct ppc_link_hash_entry *eh;
5228 eh = (struct ppc_link_hash_entry *) h;
5229 eh->tls_mask |= tls_type;
5230 }
5231 else
5232 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5233 rel->r_addend, tls_type))
5234 return FALSE;
5235
5236 ppc64_sec = ppc64_elf_section_data (sec);
5237 if (ppc64_sec->sec_type != sec_toc)
5238 {
5239 bfd_size_type amt;
5240
5241 /* One extra to simplify get_tls_mask. */
5242 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5243 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5244 if (ppc64_sec->u.toc.symndx == NULL)
5245 return FALSE;
5246 amt = sec->size * sizeof (bfd_vma) / 8;
5247 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5248 if (ppc64_sec->u.toc.add == NULL)
5249 return FALSE;
5250 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5251 ppc64_sec->sec_type = sec_toc;
5252 }
5253 BFD_ASSERT (rel->r_offset % 8 == 0);
5254 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5255 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5256
5257 /* Mark the second slot of a GD or LD entry.
5258 -1 to indicate GD and -2 to indicate LD. */
5259 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5260 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5261 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5262 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5263 goto dodyn;
5264
5265 case R_PPC64_TPREL16:
5266 case R_PPC64_TPREL16_LO:
5267 case R_PPC64_TPREL16_HI:
5268 case R_PPC64_TPREL16_HA:
5269 case R_PPC64_TPREL16_DS:
5270 case R_PPC64_TPREL16_LO_DS:
5271 case R_PPC64_TPREL16_HIGHER:
5272 case R_PPC64_TPREL16_HIGHERA:
5273 case R_PPC64_TPREL16_HIGHEST:
5274 case R_PPC64_TPREL16_HIGHESTA:
5275 if (info->shared)
5276 {
5277 if (!info->executable)
5278 info->flags |= DF_STATIC_TLS;
5279 goto dodyn;
5280 }
5281 break;
5282
5283 case R_PPC64_ADDR64:
5284 if (opd_sym_map != NULL
5285 && rel + 1 < rel_end
5286 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5287 {
5288 if (h != NULL)
5289 {
5290 if (h->root.root.string[0] == '.'
5291 && h->root.root.string[1] != 0
5292 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5293 ;
5294 else
5295 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5296 }
5297 else
5298 {
5299 asection *s;
5300 Elf_Internal_Sym *isym;
5301
5302 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5303 abfd, r_symndx);
5304 if (isym == NULL)
5305 return FALSE;
5306
5307 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5308 if (s != NULL && s != sec)
5309 opd_sym_map[rel->r_offset / 8] = s;
5310 }
5311 }
5312 /* Fall through. */
5313
5314 case R_PPC64_REL30:
5315 case R_PPC64_REL32:
5316 case R_PPC64_REL64:
5317 case R_PPC64_ADDR14:
5318 case R_PPC64_ADDR14_BRNTAKEN:
5319 case R_PPC64_ADDR14_BRTAKEN:
5320 case R_PPC64_ADDR16:
5321 case R_PPC64_ADDR16_DS:
5322 case R_PPC64_ADDR16_HA:
5323 case R_PPC64_ADDR16_HI:
5324 case R_PPC64_ADDR16_HIGHER:
5325 case R_PPC64_ADDR16_HIGHERA:
5326 case R_PPC64_ADDR16_HIGHEST:
5327 case R_PPC64_ADDR16_HIGHESTA:
5328 case R_PPC64_ADDR16_LO:
5329 case R_PPC64_ADDR16_LO_DS:
5330 case R_PPC64_ADDR24:
5331 case R_PPC64_ADDR32:
5332 case R_PPC64_UADDR16:
5333 case R_PPC64_UADDR32:
5334 case R_PPC64_UADDR64:
5335 case R_PPC64_TOC:
5336 if (h != NULL && !info->shared)
5337 /* We may need a copy reloc. */
5338 h->non_got_ref = 1;
5339
5340 /* Don't propagate .opd relocs. */
5341 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5342 break;
5343
5344 /* If we are creating a shared library, and this is a reloc
5345 against a global symbol, or a non PC relative reloc
5346 against a local symbol, then we need to copy the reloc
5347 into the shared library. However, if we are linking with
5348 -Bsymbolic, we do not need to copy a reloc against a
5349 global symbol which is defined in an object we are
5350 including in the link (i.e., DEF_REGULAR is set). At
5351 this point we have not seen all the input files, so it is
5352 possible that DEF_REGULAR is not set now but will be set
5353 later (it is never cleared). In case of a weak definition,
5354 DEF_REGULAR may be cleared later by a strong definition in
5355 a shared library. We account for that possibility below by
5356 storing information in the dyn_relocs field of the hash
5357 table entry. A similar situation occurs when creating
5358 shared libraries and symbol visibility changes render the
5359 symbol local.
5360
5361 If on the other hand, we are creating an executable, we
5362 may need to keep relocations for symbols satisfied by a
5363 dynamic library if we manage to avoid copy relocs for the
5364 symbol. */
5365 dodyn:
5366 if ((info->shared
5367 && (must_be_dyn_reloc (info, r_type)
5368 || (h != NULL
5369 && (! info->symbolic
5370 || h->root.type == bfd_link_hash_defweak
5371 || !h->def_regular))))
5372 || (ELIMINATE_COPY_RELOCS
5373 && !info->shared
5374 && h != NULL
5375 && (h->root.type == bfd_link_hash_defweak
5376 || !h->def_regular))
5377 || (!info->shared
5378 && ifunc != NULL))
5379 {
5380 struct ppc_dyn_relocs *p;
5381 struct ppc_dyn_relocs **head;
5382
5383 /* We must copy these reloc types into the output file.
5384 Create a reloc section in dynobj and make room for
5385 this reloc. */
5386 if (sreloc == NULL)
5387 {
5388 sreloc = _bfd_elf_make_dynamic_reloc_section
5389 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5390
5391 if (sreloc == NULL)
5392 return FALSE;
5393 }
5394
5395 /* If this is a global symbol, we count the number of
5396 relocations we need for this symbol. */
5397 if (h != NULL)
5398 {
5399 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5400 }
5401 else
5402 {
5403 /* Track dynamic relocs needed for local syms too.
5404 We really need local syms available to do this
5405 easily. Oh well. */
5406 asection *s;
5407 void *vpp;
5408 Elf_Internal_Sym *isym;
5409
5410 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5411 abfd, r_symndx);
5412 if (isym == NULL)
5413 return FALSE;
5414
5415 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5416 if (s == NULL)
5417 s = sec;
5418
5419 vpp = &elf_section_data (s)->local_dynrel;
5420 head = (struct ppc_dyn_relocs **) vpp;
5421 }
5422
5423 p = *head;
5424 if (p == NULL || p->sec != sec)
5425 {
5426 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5427 if (p == NULL)
5428 return FALSE;
5429 p->next = *head;
5430 *head = p;
5431 p->sec = sec;
5432 p->count = 0;
5433 p->pc_count = 0;
5434 }
5435
5436 p->count += 1;
5437 if (!must_be_dyn_reloc (info, r_type))
5438 p->pc_count += 1;
5439 }
5440 break;
5441
5442 default:
5443 break;
5444 }
5445 }
5446
5447 return TRUE;
5448 }
5449
5450 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5451 of the code entry point, and its section. */
5452
5453 static bfd_vma
5454 opd_entry_value (asection *opd_sec,
5455 bfd_vma offset,
5456 asection **code_sec,
5457 bfd_vma *code_off)
5458 {
5459 bfd *opd_bfd = opd_sec->owner;
5460 Elf_Internal_Rela *relocs;
5461 Elf_Internal_Rela *lo, *hi, *look;
5462 bfd_vma val;
5463
5464 /* No relocs implies we are linking a --just-symbols object. */
5465 if (opd_sec->reloc_count == 0)
5466 {
5467 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5468 return (bfd_vma) -1;
5469
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* Return true if symbol is defined in a regular object file. */
5565
5566 static bfd_boolean
5567 is_static_defined (struct elf_link_hash_entry *h)
5568 {
5569 return ((h->root.type == bfd_link_hash_defined
5570 || h->root.type == bfd_link_hash_defweak)
5571 && h->root.u.def.section != NULL
5572 && h->root.u.def.section->output_section != NULL);
5573 }
5574
5575 /* If FDH is a function descriptor symbol, return the associated code
5576 entry symbol if it is defined. Return NULL otherwise. */
5577
5578 static struct ppc_link_hash_entry *
5579 defined_code_entry (struct ppc_link_hash_entry *fdh)
5580 {
5581 if (fdh->is_func_descriptor)
5582 {
5583 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5584 if (fh->elf.root.type == bfd_link_hash_defined
5585 || fh->elf.root.type == bfd_link_hash_defweak)
5586 return fh;
5587 }
5588 return NULL;
5589 }
5590
5591 /* If FH is a function code entry symbol, return the associated
5592 function descriptor symbol if it is defined. Return NULL otherwise. */
5593
5594 static struct ppc_link_hash_entry *
5595 defined_func_desc (struct ppc_link_hash_entry *fh)
5596 {
5597 if (fh->oh != NULL
5598 && fh->oh->is_func_descriptor)
5599 {
5600 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5601 if (fdh->elf.root.type == bfd_link_hash_defined
5602 || fdh->elf.root.type == bfd_link_hash_defweak)
5603 return fdh;
5604 }
5605 return NULL;
5606 }
5607
5608 /* Mark all our entry sym sections, both opd and code section. */
5609
5610 static void
5611 ppc64_elf_gc_keep (struct bfd_link_info *info)
5612 {
5613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5614 struct bfd_sym_chain *sym;
5615
5616 if (htab == NULL)
5617 return;
5618
5619 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5620 {
5621 struct ppc_link_hash_entry *eh, *fh;
5622 asection *sec;
5623
5624 eh = (struct ppc_link_hash_entry *)
5625 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5626 if (eh == NULL)
5627 continue;
5628 if (eh->elf.root.type != bfd_link_hash_defined
5629 && eh->elf.root.type != bfd_link_hash_defweak)
5630 continue;
5631
5632 fh = defined_code_entry (eh);
5633 if (fh != NULL)
5634 {
5635 sec = fh->elf.root.u.def.section;
5636 sec->flags |= SEC_KEEP;
5637 }
5638 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5639 && opd_entry_value (eh->elf.root.u.def.section,
5640 eh->elf.root.u.def.value,
5641 &sec, NULL) != (bfd_vma) -1)
5642 sec->flags |= SEC_KEEP;
5643
5644 sec = eh->elf.root.u.def.section;
5645 sec->flags |= SEC_KEEP;
5646 }
5647 }
5648
5649 /* Mark sections containing dynamically referenced symbols. When
5650 building shared libraries, we must assume that any visible symbol is
5651 referenced. */
5652
5653 static bfd_boolean
5654 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5655 {
5656 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5657 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5658 struct ppc_link_hash_entry *fdh;
5659
5660 if (eh->elf.root.type == bfd_link_hash_warning)
5661 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5662
5663 /* Dynamic linking info is on the func descriptor sym. */
5664 fdh = defined_func_desc (eh);
5665 if (fdh != NULL)
5666 eh = fdh;
5667
5668 if ((eh->elf.root.type == bfd_link_hash_defined
5669 || eh->elf.root.type == bfd_link_hash_defweak)
5670 && (eh->elf.ref_dynamic
5671 || (!info->executable
5672 && eh->elf.def_regular
5673 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5674 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5675 {
5676 asection *code_sec;
5677 struct ppc_link_hash_entry *fh;
5678
5679 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5680
5681 /* Function descriptor syms cause the associated
5682 function code sym section to be marked. */
5683 fh = defined_code_entry (eh);
5684 if (fh != NULL)
5685 {
5686 code_sec = fh->elf.root.u.def.section;
5687 code_sec->flags |= SEC_KEEP;
5688 }
5689 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5690 && opd_entry_value (eh->elf.root.u.def.section,
5691 eh->elf.root.u.def.value,
5692 &code_sec, NULL) != (bfd_vma) -1)
5693 code_sec->flags |= SEC_KEEP;
5694 }
5695
5696 return TRUE;
5697 }
5698
5699 /* Return the section that should be marked against GC for a given
5700 relocation. */
5701
5702 static asection *
5703 ppc64_elf_gc_mark_hook (asection *sec,
5704 struct bfd_link_info *info,
5705 Elf_Internal_Rela *rel,
5706 struct elf_link_hash_entry *h,
5707 Elf_Internal_Sym *sym)
5708 {
5709 asection *rsec;
5710
5711 /* Syms return NULL if we're marking .opd, so we avoid marking all
5712 function sections, as all functions are referenced in .opd. */
5713 rsec = NULL;
5714 if (get_opd_info (sec) != NULL)
5715 return rsec;
5716
5717 if (h != NULL)
5718 {
5719 enum elf_ppc64_reloc_type r_type;
5720 struct ppc_link_hash_entry *eh, *fh, *fdh;
5721
5722 r_type = ELF64_R_TYPE (rel->r_info);
5723 switch (r_type)
5724 {
5725 case R_PPC64_GNU_VTINHERIT:
5726 case R_PPC64_GNU_VTENTRY:
5727 break;
5728
5729 default:
5730 switch (h->root.type)
5731 {
5732 case bfd_link_hash_defined:
5733 case bfd_link_hash_defweak:
5734 eh = (struct ppc_link_hash_entry *) h;
5735 fdh = defined_func_desc (eh);
5736 if (fdh != NULL)
5737 eh = fdh;
5738
5739 /* Function descriptor syms cause the associated
5740 function code sym section to be marked. */
5741 fh = defined_code_entry (eh);
5742 if (fh != NULL)
5743 {
5744 /* They also mark their opd section. */
5745 eh->elf.root.u.def.section->gc_mark = 1;
5746
5747 rsec = fh->elf.root.u.def.section;
5748 }
5749 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5750 && opd_entry_value (eh->elf.root.u.def.section,
5751 eh->elf.root.u.def.value,
5752 &rsec, NULL) != (bfd_vma) -1)
5753 eh->elf.root.u.def.section->gc_mark = 1;
5754 else
5755 rsec = h->root.u.def.section;
5756 break;
5757
5758 case bfd_link_hash_common:
5759 rsec = h->root.u.c.p->section;
5760 break;
5761
5762 default:
5763 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5764 }
5765 }
5766 }
5767 else
5768 {
5769 struct _opd_sec_data *opd;
5770
5771 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5772 opd = get_opd_info (rsec);
5773 if (opd != NULL && opd->func_sec != NULL)
5774 {
5775 rsec->gc_mark = 1;
5776
5777 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5778 }
5779 }
5780
5781 return rsec;
5782 }
5783
5784 /* Update the .got, .plt. and dynamic reloc reference counts for the
5785 section being removed. */
5786
5787 static bfd_boolean
5788 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5789 asection *sec, const Elf_Internal_Rela *relocs)
5790 {
5791 struct ppc_link_hash_table *htab;
5792 Elf_Internal_Shdr *symtab_hdr;
5793 struct elf_link_hash_entry **sym_hashes;
5794 struct got_entry **local_got_ents;
5795 const Elf_Internal_Rela *rel, *relend;
5796
5797 if (info->relocatable)
5798 return TRUE;
5799
5800 if ((sec->flags & SEC_ALLOC) == 0)
5801 return TRUE;
5802
5803 elf_section_data (sec)->local_dynrel = NULL;
5804
5805 htab = ppc_hash_table (info);
5806 if (htab == NULL)
5807 return FALSE;
5808
5809 symtab_hdr = &elf_symtab_hdr (abfd);
5810 sym_hashes = elf_sym_hashes (abfd);
5811 local_got_ents = elf_local_got_ents (abfd);
5812
5813 relend = relocs + sec->reloc_count;
5814 for (rel = relocs; rel < relend; rel++)
5815 {
5816 unsigned long r_symndx;
5817 enum elf_ppc64_reloc_type r_type;
5818 struct elf_link_hash_entry *h = NULL;
5819 unsigned char tls_type = 0;
5820
5821 r_symndx = ELF64_R_SYM (rel->r_info);
5822 r_type = ELF64_R_TYPE (rel->r_info);
5823 if (r_symndx >= symtab_hdr->sh_info)
5824 {
5825 struct ppc_link_hash_entry *eh;
5826 struct ppc_dyn_relocs **pp;
5827 struct ppc_dyn_relocs *p;
5828
5829 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5830 h = elf_follow_link (h);
5831 eh = (struct ppc_link_hash_entry *) h;
5832
5833 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5834 if (p->sec == sec)
5835 {
5836 /* Everything must go for SEC. */
5837 *pp = p->next;
5838 break;
5839 }
5840 }
5841
5842 if (is_branch_reloc (r_type))
5843 {
5844 struct plt_entry **ifunc = NULL;
5845 if (h != NULL)
5846 {
5847 if (h->type == STT_GNU_IFUNC)
5848 ifunc = &h->plt.plist;
5849 }
5850 else if (local_got_ents != NULL)
5851 {
5852 struct plt_entry **local_plt = (struct plt_entry **)
5853 (local_got_ents + symtab_hdr->sh_info);
5854 unsigned char *local_got_tls_masks = (unsigned char *)
5855 (local_plt + symtab_hdr->sh_info);
5856 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5857 ifunc = local_plt + r_symndx;
5858 }
5859 if (ifunc != NULL)
5860 {
5861 struct plt_entry *ent;
5862
5863 for (ent = *ifunc; ent != NULL; ent = ent->next)
5864 if (ent->addend == rel->r_addend)
5865 break;
5866 if (ent == NULL)
5867 abort ();
5868 if (ent->plt.refcount > 0)
5869 ent->plt.refcount -= 1;
5870 continue;
5871 }
5872 }
5873
5874 switch (r_type)
5875 {
5876 case R_PPC64_GOT_TLSLD16:
5877 case R_PPC64_GOT_TLSLD16_LO:
5878 case R_PPC64_GOT_TLSLD16_HI:
5879 case R_PPC64_GOT_TLSLD16_HA:
5880 tls_type = TLS_TLS | TLS_LD;
5881 goto dogot;
5882
5883 case R_PPC64_GOT_TLSGD16:
5884 case R_PPC64_GOT_TLSGD16_LO:
5885 case R_PPC64_GOT_TLSGD16_HI:
5886 case R_PPC64_GOT_TLSGD16_HA:
5887 tls_type = TLS_TLS | TLS_GD;
5888 goto dogot;
5889
5890 case R_PPC64_GOT_TPREL16_DS:
5891 case R_PPC64_GOT_TPREL16_LO_DS:
5892 case R_PPC64_GOT_TPREL16_HI:
5893 case R_PPC64_GOT_TPREL16_HA:
5894 tls_type = TLS_TLS | TLS_TPREL;
5895 goto dogot;
5896
5897 case R_PPC64_GOT_DTPREL16_DS:
5898 case R_PPC64_GOT_DTPREL16_LO_DS:
5899 case R_PPC64_GOT_DTPREL16_HI:
5900 case R_PPC64_GOT_DTPREL16_HA:
5901 tls_type = TLS_TLS | TLS_DTPREL;
5902 goto dogot;
5903
5904 case R_PPC64_GOT16:
5905 case R_PPC64_GOT16_DS:
5906 case R_PPC64_GOT16_HA:
5907 case R_PPC64_GOT16_HI:
5908 case R_PPC64_GOT16_LO:
5909 case R_PPC64_GOT16_LO_DS:
5910 dogot:
5911 {
5912 struct got_entry *ent;
5913
5914 if (h != NULL)
5915 ent = h->got.glist;
5916 else
5917 ent = local_got_ents[r_symndx];
5918
5919 for (; ent != NULL; ent = ent->next)
5920 if (ent->addend == rel->r_addend
5921 && ent->owner == abfd
5922 && ent->tls_type == tls_type)
5923 break;
5924 if (ent == NULL)
5925 abort ();
5926 if (ent->got.refcount > 0)
5927 ent->got.refcount -= 1;
5928 }
5929 break;
5930
5931 case R_PPC64_PLT16_HA:
5932 case R_PPC64_PLT16_HI:
5933 case R_PPC64_PLT16_LO:
5934 case R_PPC64_PLT32:
5935 case R_PPC64_PLT64:
5936 case R_PPC64_REL14:
5937 case R_PPC64_REL14_BRNTAKEN:
5938 case R_PPC64_REL14_BRTAKEN:
5939 case R_PPC64_REL24:
5940 if (h != NULL)
5941 {
5942 struct plt_entry *ent;
5943
5944 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5945 if (ent->addend == rel->r_addend)
5946 break;
5947 if (ent != NULL && ent->plt.refcount > 0)
5948 ent->plt.refcount -= 1;
5949 }
5950 break;
5951
5952 default:
5953 break;
5954 }
5955 }
5956 return TRUE;
5957 }
5958
5959 /* The maximum size of .sfpr. */
5960 #define SFPR_MAX (218*4)
5961
5962 struct sfpr_def_parms
5963 {
5964 const char name[12];
5965 unsigned char lo, hi;
5966 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5967 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5968 };
5969
5970 /* Auto-generate _save*, _rest* functions in .sfpr. */
5971
5972 static bfd_boolean
5973 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5974 {
5975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5976 unsigned int i;
5977 size_t len = strlen (parm->name);
5978 bfd_boolean writing = FALSE;
5979 char sym[16];
5980
5981 if (htab == NULL)
5982 return FALSE;
5983
5984 memcpy (sym, parm->name, len);
5985 sym[len + 2] = 0;
5986
5987 for (i = parm->lo; i <= parm->hi; i++)
5988 {
5989 struct elf_link_hash_entry *h;
5990
5991 sym[len + 0] = i / 10 + '0';
5992 sym[len + 1] = i % 10 + '0';
5993 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5994 if (h != NULL
5995 && !h->def_regular)
5996 {
5997 h->root.type = bfd_link_hash_defined;
5998 h->root.u.def.section = htab->sfpr;
5999 h->root.u.def.value = htab->sfpr->size;
6000 h->type = STT_FUNC;
6001 h->def_regular = 1;
6002 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6003 writing = TRUE;
6004 if (htab->sfpr->contents == NULL)
6005 {
6006 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6007 if (htab->sfpr->contents == NULL)
6008 return FALSE;
6009 }
6010 }
6011 if (writing)
6012 {
6013 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6014 if (i != parm->hi)
6015 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6016 else
6017 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6018 htab->sfpr->size = p - htab->sfpr->contents;
6019 }
6020 }
6021
6022 return TRUE;
6023 }
6024
6025 static bfd_byte *
6026 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6027 {
6028 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6029 return p + 4;
6030 }
6031
6032 static bfd_byte *
6033 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6034 {
6035 p = savegpr0 (abfd, p, r);
6036 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6037 p = p + 4;
6038 bfd_put_32 (abfd, BLR, p);
6039 return p + 4;
6040 }
6041
6042 static bfd_byte *
6043 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6044 {
6045 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6046 return p + 4;
6047 }
6048
6049 static bfd_byte *
6050 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6051 {
6052 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6053 p = p + 4;
6054 p = restgpr0 (abfd, p, r);
6055 bfd_put_32 (abfd, MTLR_R0, p);
6056 p = p + 4;
6057 if (r == 29)
6058 {
6059 p = restgpr0 (abfd, p, 30);
6060 p = restgpr0 (abfd, p, 31);
6061 }
6062 bfd_put_32 (abfd, BLR, p);
6063 return p + 4;
6064 }
6065
6066 static bfd_byte *
6067 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6068 {
6069 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6070 return p + 4;
6071 }
6072
6073 static bfd_byte *
6074 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6075 {
6076 p = savegpr1 (abfd, p, r);
6077 bfd_put_32 (abfd, BLR, p);
6078 return p + 4;
6079 }
6080
6081 static bfd_byte *
6082 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6083 {
6084 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6085 return p + 4;
6086 }
6087
6088 static bfd_byte *
6089 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6090 {
6091 p = restgpr1 (abfd, p, r);
6092 bfd_put_32 (abfd, BLR, p);
6093 return p + 4;
6094 }
6095
6096 static bfd_byte *
6097 savefpr (bfd *abfd, bfd_byte *p, int r)
6098 {
6099 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6100 return p + 4;
6101 }
6102
6103 static bfd_byte *
6104 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6105 {
6106 p = savefpr (abfd, p, r);
6107 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6108 p = p + 4;
6109 bfd_put_32 (abfd, BLR, p);
6110 return p + 4;
6111 }
6112
6113 static bfd_byte *
6114 restfpr (bfd *abfd, bfd_byte *p, int r)
6115 {
6116 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6117 return p + 4;
6118 }
6119
6120 static bfd_byte *
6121 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6122 {
6123 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6124 p = p + 4;
6125 p = restfpr (abfd, p, r);
6126 bfd_put_32 (abfd, MTLR_R0, p);
6127 p = p + 4;
6128 if (r == 29)
6129 {
6130 p = restfpr (abfd, p, 30);
6131 p = restfpr (abfd, p, 31);
6132 }
6133 bfd_put_32 (abfd, BLR, p);
6134 return p + 4;
6135 }
6136
6137 static bfd_byte *
6138 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6139 {
6140 p = savefpr (abfd, p, r);
6141 bfd_put_32 (abfd, BLR, p);
6142 return p + 4;
6143 }
6144
6145 static bfd_byte *
6146 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6147 {
6148 p = restfpr (abfd, p, r);
6149 bfd_put_32 (abfd, BLR, p);
6150 return p + 4;
6151 }
6152
6153 static bfd_byte *
6154 savevr (bfd *abfd, bfd_byte *p, int r)
6155 {
6156 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6157 p = p + 4;
6158 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6159 return p + 4;
6160 }
6161
6162 static bfd_byte *
6163 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6164 {
6165 p = savevr (abfd, p, r);
6166 bfd_put_32 (abfd, BLR, p);
6167 return p + 4;
6168 }
6169
6170 static bfd_byte *
6171 restvr (bfd *abfd, bfd_byte *p, int r)
6172 {
6173 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6174 p = p + 4;
6175 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6176 return p + 4;
6177 }
6178
6179 static bfd_byte *
6180 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6181 {
6182 p = restvr (abfd, p, r);
6183 bfd_put_32 (abfd, BLR, p);
6184 return p + 4;
6185 }
6186
6187 /* Called via elf_link_hash_traverse to transfer dynamic linking
6188 information on function code symbol entries to their corresponding
6189 function descriptor symbol entries. */
6190
6191 static bfd_boolean
6192 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6193 {
6194 struct bfd_link_info *info;
6195 struct ppc_link_hash_table *htab;
6196 struct plt_entry *ent;
6197 struct ppc_link_hash_entry *fh;
6198 struct ppc_link_hash_entry *fdh;
6199 bfd_boolean force_local;
6200
6201 fh = (struct ppc_link_hash_entry *) h;
6202 if (fh->elf.root.type == bfd_link_hash_indirect)
6203 return TRUE;
6204
6205 if (fh->elf.root.type == bfd_link_hash_warning)
6206 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6207
6208 info = inf;
6209 htab = ppc_hash_table (info);
6210 if (htab == NULL)
6211 return FALSE;
6212
6213 /* Resolve undefined references to dot-symbols as the value
6214 in the function descriptor, if we have one in a regular object.
6215 This is to satisfy cases like ".quad .foo". Calls to functions
6216 in dynamic objects are handled elsewhere. */
6217 if (fh->elf.root.type == bfd_link_hash_undefweak
6218 && fh->was_undefined
6219 && (fdh = defined_func_desc (fh)) != NULL
6220 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6221 && opd_entry_value (fdh->elf.root.u.def.section,
6222 fdh->elf.root.u.def.value,
6223 &fh->elf.root.u.def.section,
6224 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6225 {
6226 fh->elf.root.type = fdh->elf.root.type;
6227 fh->elf.forced_local = 1;
6228 fh->elf.def_regular = fdh->elf.def_regular;
6229 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6230 }
6231
6232 /* If this is a function code symbol, transfer dynamic linking
6233 information to the function descriptor symbol. */
6234 if (!fh->is_func)
6235 return TRUE;
6236
6237 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6238 if (ent->plt.refcount > 0)
6239 break;
6240 if (ent == NULL
6241 || fh->elf.root.root.string[0] != '.'
6242 || fh->elf.root.root.string[1] == '\0')
6243 return TRUE;
6244
6245 /* Find the corresponding function descriptor symbol. Create it
6246 as undefined if necessary. */
6247
6248 fdh = lookup_fdh (fh, htab);
6249 if (fdh == NULL
6250 && !info->executable
6251 && (fh->elf.root.type == bfd_link_hash_undefined
6252 || fh->elf.root.type == bfd_link_hash_undefweak))
6253 {
6254 fdh = make_fdh (info, fh);
6255 if (fdh == NULL)
6256 return FALSE;
6257 }
6258
6259 /* Fake function descriptors are made undefweak. If the function
6260 code symbol is strong undefined, make the fake sym the same.
6261 If the function code symbol is defined, then force the fake
6262 descriptor local; We can't support overriding of symbols in a
6263 shared library on a fake descriptor. */
6264
6265 if (fdh != NULL
6266 && fdh->fake
6267 && fdh->elf.root.type == bfd_link_hash_undefweak)
6268 {
6269 if (fh->elf.root.type == bfd_link_hash_undefined)
6270 {
6271 fdh->elf.root.type = bfd_link_hash_undefined;
6272 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6273 }
6274 else if (fh->elf.root.type == bfd_link_hash_defined
6275 || fh->elf.root.type == bfd_link_hash_defweak)
6276 {
6277 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6278 }
6279 }
6280
6281 if (fdh != NULL
6282 && !fdh->elf.forced_local
6283 && (!info->executable
6284 || fdh->elf.def_dynamic
6285 || fdh->elf.ref_dynamic
6286 || (fdh->elf.root.type == bfd_link_hash_undefweak
6287 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6288 {
6289 if (fdh->elf.dynindx == -1)
6290 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6291 return FALSE;
6292 fdh->elf.ref_regular |= fh->elf.ref_regular;
6293 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6294 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6295 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6296 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6297 {
6298 move_plt_plist (fh, fdh);
6299 fdh->elf.needs_plt = 1;
6300 }
6301 fdh->is_func_descriptor = 1;
6302 fdh->oh = fh;
6303 fh->oh = fdh;
6304 }
6305
6306 /* Now that the info is on the function descriptor, clear the
6307 function code sym info. Any function code syms for which we
6308 don't have a definition in a regular file, we force local.
6309 This prevents a shared library from exporting syms that have
6310 been imported from another library. Function code syms that
6311 are really in the library we must leave global to prevent the
6312 linker dragging in a definition from a static library. */
6313 force_local = (!fh->elf.def_regular
6314 || fdh == NULL
6315 || !fdh->elf.def_regular
6316 || fdh->elf.forced_local);
6317 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6318
6319 return TRUE;
6320 }
6321
6322 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6323 this hook to a) provide some gcc support functions, and b) transfer
6324 dynamic linking information gathered so far on function code symbol
6325 entries, to their corresponding function descriptor symbol entries. */
6326
6327 static bfd_boolean
6328 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6329 struct bfd_link_info *info)
6330 {
6331 struct ppc_link_hash_table *htab;
6332 unsigned int i;
6333 const struct sfpr_def_parms funcs[] =
6334 {
6335 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6336 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6337 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6338 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6339 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6340 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6341 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6342 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6343 { "._savef", 14, 31, savefpr, savefpr1_tail },
6344 { "._restf", 14, 31, restfpr, restfpr1_tail },
6345 { "_savevr_", 20, 31, savevr, savevr_tail },
6346 { "_restvr_", 20, 31, restvr, restvr_tail }
6347 };
6348
6349 htab = ppc_hash_table (info);
6350 if (htab == NULL)
6351 return FALSE;
6352
6353 if (htab->sfpr == NULL)
6354 /* We don't have any relocs. */
6355 return TRUE;
6356
6357 /* Provide any missing _save* and _rest* functions. */
6358 htab->sfpr->size = 0;
6359 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6360 if (!sfpr_define (info, &funcs[i]))
6361 return FALSE;
6362
6363 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6364
6365 if (htab->sfpr->size == 0)
6366 htab->sfpr->flags |= SEC_EXCLUDE;
6367
6368 return TRUE;
6369 }
6370
6371 /* Adjust a symbol defined by a dynamic object and referenced by a
6372 regular object. The current definition is in some section of the
6373 dynamic object, but we're not including those sections. We have to
6374 change the definition to something the rest of the link can
6375 understand. */
6376
6377 static bfd_boolean
6378 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6379 struct elf_link_hash_entry *h)
6380 {
6381 struct ppc_link_hash_table *htab;
6382 asection *s;
6383
6384 htab = ppc_hash_table (info);
6385 if (htab == NULL)
6386 return FALSE;
6387
6388 /* Deal with function syms. */
6389 if (h->type == STT_FUNC
6390 || h->type == STT_GNU_IFUNC
6391 || h->needs_plt)
6392 {
6393 /* Clear procedure linkage table information for any symbol that
6394 won't need a .plt entry. */
6395 struct plt_entry *ent;
6396 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6397 if (ent->plt.refcount > 0)
6398 break;
6399 if (ent == NULL
6400 || (h->type != STT_GNU_IFUNC
6401 && (SYMBOL_CALLS_LOCAL (info, h)
6402 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6403 && h->root.type == bfd_link_hash_undefweak))))
6404 {
6405 h->plt.plist = NULL;
6406 h->needs_plt = 0;
6407 }
6408 }
6409 else
6410 h->plt.plist = NULL;
6411
6412 /* If this is a weak symbol, and there is a real definition, the
6413 processor independent code will have arranged for us to see the
6414 real definition first, and we can just use the same value. */
6415 if (h->u.weakdef != NULL)
6416 {
6417 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6418 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6419 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6420 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6421 if (ELIMINATE_COPY_RELOCS)
6422 h->non_got_ref = h->u.weakdef->non_got_ref;
6423 return TRUE;
6424 }
6425
6426 /* If we are creating a shared library, we must presume that the
6427 only references to the symbol are via the global offset table.
6428 For such cases we need not do anything here; the relocations will
6429 be handled correctly by relocate_section. */
6430 if (info->shared)
6431 return TRUE;
6432
6433 /* If there are no references to this symbol that do not use the
6434 GOT, we don't need to generate a copy reloc. */
6435 if (!h->non_got_ref)
6436 return TRUE;
6437
6438 /* Don't generate a copy reloc for symbols defined in the executable. */
6439 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6440 return TRUE;
6441
6442 if (ELIMINATE_COPY_RELOCS)
6443 {
6444 struct ppc_link_hash_entry * eh;
6445 struct ppc_dyn_relocs *p;
6446
6447 eh = (struct ppc_link_hash_entry *) h;
6448 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6449 {
6450 s = p->sec->output_section;
6451 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6452 break;
6453 }
6454
6455 /* If we didn't find any dynamic relocs in read-only sections, then
6456 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6457 if (p == NULL)
6458 {
6459 h->non_got_ref = 0;
6460 return TRUE;
6461 }
6462 }
6463
6464 if (h->plt.plist != NULL)
6465 {
6466 /* We should never get here, but unfortunately there are versions
6467 of gcc out there that improperly (for this ABI) put initialized
6468 function pointers, vtable refs and suchlike in read-only
6469 sections. Allow them to proceed, but warn that this might
6470 break at runtime. */
6471 (*_bfd_error_handler)
6472 (_("copy reloc against `%s' requires lazy plt linking; "
6473 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6474 h->root.root.string);
6475 }
6476
6477 /* This is a reference to a symbol defined by a dynamic object which
6478 is not a function. */
6479
6480 if (h->size == 0)
6481 {
6482 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6483 h->root.root.string);
6484 return TRUE;
6485 }
6486
6487 /* We must allocate the symbol in our .dynbss section, which will
6488 become part of the .bss section of the executable. There will be
6489 an entry for this symbol in the .dynsym section. The dynamic
6490 object will contain position independent code, so all references
6491 from the dynamic object to this symbol will go through the global
6492 offset table. The dynamic linker will use the .dynsym entry to
6493 determine the address it must put in the global offset table, so
6494 both the dynamic object and the regular object will refer to the
6495 same memory location for the variable. */
6496
6497 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6498 to copy the initial value out of the dynamic object and into the
6499 runtime process image. We need to remember the offset into the
6500 .rela.bss section we are going to use. */
6501 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6502 {
6503 htab->relbss->size += sizeof (Elf64_External_Rela);
6504 h->needs_copy = 1;
6505 }
6506
6507 s = htab->dynbss;
6508
6509 return _bfd_elf_adjust_dynamic_copy (h, s);
6510 }
6511
6512 /* If given a function descriptor symbol, hide both the function code
6513 sym and the descriptor. */
6514 static void
6515 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6516 struct elf_link_hash_entry *h,
6517 bfd_boolean force_local)
6518 {
6519 struct ppc_link_hash_entry *eh;
6520 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6521
6522 eh = (struct ppc_link_hash_entry *) h;
6523 if (eh->is_func_descriptor)
6524 {
6525 struct ppc_link_hash_entry *fh = eh->oh;
6526
6527 if (fh == NULL)
6528 {
6529 const char *p, *q;
6530 struct ppc_link_hash_table *htab;
6531 char save;
6532
6533 /* We aren't supposed to use alloca in BFD because on
6534 systems which do not have alloca the version in libiberty
6535 calls xmalloc, which might cause the program to crash
6536 when it runs out of memory. This function doesn't have a
6537 return status, so there's no way to gracefully return an
6538 error. So cheat. We know that string[-1] can be safely
6539 accessed; It's either a string in an ELF string table,
6540 or allocated in an objalloc structure. */
6541
6542 p = eh->elf.root.root.string - 1;
6543 save = *p;
6544 *(char *) p = '.';
6545 htab = ppc_hash_table (info);
6546 if (htab == NULL)
6547 return;
6548
6549 fh = (struct ppc_link_hash_entry *)
6550 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6551 *(char *) p = save;
6552
6553 /* Unfortunately, if it so happens that the string we were
6554 looking for was allocated immediately before this string,
6555 then we overwrote the string terminator. That's the only
6556 reason the lookup should fail. */
6557 if (fh == NULL)
6558 {
6559 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6560 while (q >= eh->elf.root.root.string && *q == *p)
6561 --q, --p;
6562 if (q < eh->elf.root.root.string && *p == '.')
6563 fh = (struct ppc_link_hash_entry *)
6564 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6565 }
6566 if (fh != NULL)
6567 {
6568 eh->oh = fh;
6569 fh->oh = eh;
6570 }
6571 }
6572 if (fh != NULL)
6573 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6574 }
6575 }
6576
6577 static bfd_boolean
6578 get_sym_h (struct elf_link_hash_entry **hp,
6579 Elf_Internal_Sym **symp,
6580 asection **symsecp,
6581 unsigned char **tls_maskp,
6582 Elf_Internal_Sym **locsymsp,
6583 unsigned long r_symndx,
6584 bfd *ibfd)
6585 {
6586 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6587
6588 if (r_symndx >= symtab_hdr->sh_info)
6589 {
6590 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6591 struct elf_link_hash_entry *h;
6592
6593 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6594 h = elf_follow_link (h);
6595
6596 if (hp != NULL)
6597 *hp = h;
6598
6599 if (symp != NULL)
6600 *symp = NULL;
6601
6602 if (symsecp != NULL)
6603 {
6604 asection *symsec = NULL;
6605 if (h->root.type == bfd_link_hash_defined
6606 || h->root.type == bfd_link_hash_defweak)
6607 symsec = h->root.u.def.section;
6608 *symsecp = symsec;
6609 }
6610
6611 if (tls_maskp != NULL)
6612 {
6613 struct ppc_link_hash_entry *eh;
6614
6615 eh = (struct ppc_link_hash_entry *) h;
6616 *tls_maskp = &eh->tls_mask;
6617 }
6618 }
6619 else
6620 {
6621 Elf_Internal_Sym *sym;
6622 Elf_Internal_Sym *locsyms = *locsymsp;
6623
6624 if (locsyms == NULL)
6625 {
6626 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6627 if (locsyms == NULL)
6628 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6629 symtab_hdr->sh_info,
6630 0, NULL, NULL, NULL);
6631 if (locsyms == NULL)
6632 return FALSE;
6633 *locsymsp = locsyms;
6634 }
6635 sym = locsyms + r_symndx;
6636
6637 if (hp != NULL)
6638 *hp = NULL;
6639
6640 if (symp != NULL)
6641 *symp = sym;
6642
6643 if (symsecp != NULL)
6644 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6645
6646 if (tls_maskp != NULL)
6647 {
6648 struct got_entry **lgot_ents;
6649 unsigned char *tls_mask;
6650
6651 tls_mask = NULL;
6652 lgot_ents = elf_local_got_ents (ibfd);
6653 if (lgot_ents != NULL)
6654 {
6655 struct plt_entry **local_plt = (struct plt_entry **)
6656 (lgot_ents + symtab_hdr->sh_info);
6657 unsigned char *lgot_masks = (unsigned char *)
6658 (local_plt + symtab_hdr->sh_info);
6659 tls_mask = &lgot_masks[r_symndx];
6660 }
6661 *tls_maskp = tls_mask;
6662 }
6663 }
6664 return TRUE;
6665 }
6666
6667 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6668 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6669 type suitable for optimization, and 1 otherwise. */
6670
6671 static int
6672 get_tls_mask (unsigned char **tls_maskp,
6673 unsigned long *toc_symndx,
6674 bfd_vma *toc_addend,
6675 Elf_Internal_Sym **locsymsp,
6676 const Elf_Internal_Rela *rel,
6677 bfd *ibfd)
6678 {
6679 unsigned long r_symndx;
6680 int next_r;
6681 struct elf_link_hash_entry *h;
6682 Elf_Internal_Sym *sym;
6683 asection *sec;
6684 bfd_vma off;
6685
6686 r_symndx = ELF64_R_SYM (rel->r_info);
6687 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6688 return 0;
6689
6690 if ((*tls_maskp != NULL && **tls_maskp != 0)
6691 || sec == NULL
6692 || ppc64_elf_section_data (sec) == NULL
6693 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6694 return 1;
6695
6696 /* Look inside a TOC section too. */
6697 if (h != NULL)
6698 {
6699 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6700 off = h->root.u.def.value;
6701 }
6702 else
6703 off = sym->st_value;
6704 off += rel->r_addend;
6705 BFD_ASSERT (off % 8 == 0);
6706 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6707 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6708 if (toc_symndx != NULL)
6709 *toc_symndx = r_symndx;
6710 if (toc_addend != NULL)
6711 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6712 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6713 return 0;
6714 if ((h == NULL || is_static_defined (h))
6715 && (next_r == -1 || next_r == -2))
6716 return 1 - next_r;
6717 return 1;
6718 }
6719
6720 /* Adjust all global syms defined in opd sections. In gcc generated
6721 code for the old ABI, these will already have been done. */
6722
6723 static bfd_boolean
6724 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6725 {
6726 struct ppc_link_hash_entry *eh;
6727 asection *sym_sec;
6728 struct _opd_sec_data *opd;
6729
6730 if (h->root.type == bfd_link_hash_indirect)
6731 return TRUE;
6732
6733 if (h->root.type == bfd_link_hash_warning)
6734 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6735
6736 if (h->root.type != bfd_link_hash_defined
6737 && h->root.type != bfd_link_hash_defweak)
6738 return TRUE;
6739
6740 eh = (struct ppc_link_hash_entry *) h;
6741 if (eh->adjust_done)
6742 return TRUE;
6743
6744 sym_sec = eh->elf.root.u.def.section;
6745 opd = get_opd_info (sym_sec);
6746 if (opd != NULL && opd->adjust != NULL)
6747 {
6748 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6749 if (adjust == -1)
6750 {
6751 /* This entry has been deleted. */
6752 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6753 if (dsec == NULL)
6754 {
6755 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6756 if (elf_discarded_section (dsec))
6757 {
6758 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6759 break;
6760 }
6761 }
6762 eh->elf.root.u.def.value = 0;
6763 eh->elf.root.u.def.section = dsec;
6764 }
6765 else
6766 eh->elf.root.u.def.value += adjust;
6767 eh->adjust_done = 1;
6768 }
6769 return TRUE;
6770 }
6771
6772 /* Handles decrementing dynamic reloc counts for the reloc specified by
6773 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6774 have already been determined. */
6775
6776 static bfd_boolean
6777 dec_dynrel_count (bfd_vma r_info,
6778 asection *sec,
6779 struct bfd_link_info *info,
6780 Elf_Internal_Sym **local_syms,
6781 struct elf_link_hash_entry *h,
6782 asection *sym_sec)
6783 {
6784 enum elf_ppc64_reloc_type r_type;
6785 struct ppc_dyn_relocs *p;
6786 struct ppc_dyn_relocs **pp;
6787
6788 /* Can this reloc be dynamic? This switch, and later tests here
6789 should be kept in sync with the code in check_relocs. */
6790 r_type = ELF64_R_TYPE (r_info);
6791 switch (r_type)
6792 {
6793 default:
6794 return TRUE;
6795
6796 case R_PPC64_TPREL16:
6797 case R_PPC64_TPREL16_LO:
6798 case R_PPC64_TPREL16_HI:
6799 case R_PPC64_TPREL16_HA:
6800 case R_PPC64_TPREL16_DS:
6801 case R_PPC64_TPREL16_LO_DS:
6802 case R_PPC64_TPREL16_HIGHER:
6803 case R_PPC64_TPREL16_HIGHERA:
6804 case R_PPC64_TPREL16_HIGHEST:
6805 case R_PPC64_TPREL16_HIGHESTA:
6806 if (!info->shared)
6807 return TRUE;
6808
6809 case R_PPC64_TPREL64:
6810 case R_PPC64_DTPMOD64:
6811 case R_PPC64_DTPREL64:
6812 case R_PPC64_ADDR64:
6813 case R_PPC64_REL30:
6814 case R_PPC64_REL32:
6815 case R_PPC64_REL64:
6816 case R_PPC64_ADDR14:
6817 case R_PPC64_ADDR14_BRNTAKEN:
6818 case R_PPC64_ADDR14_BRTAKEN:
6819 case R_PPC64_ADDR16:
6820 case R_PPC64_ADDR16_DS:
6821 case R_PPC64_ADDR16_HA:
6822 case R_PPC64_ADDR16_HI:
6823 case R_PPC64_ADDR16_HIGHER:
6824 case R_PPC64_ADDR16_HIGHERA:
6825 case R_PPC64_ADDR16_HIGHEST:
6826 case R_PPC64_ADDR16_HIGHESTA:
6827 case R_PPC64_ADDR16_LO:
6828 case R_PPC64_ADDR16_LO_DS:
6829 case R_PPC64_ADDR24:
6830 case R_PPC64_ADDR32:
6831 case R_PPC64_UADDR16:
6832 case R_PPC64_UADDR32:
6833 case R_PPC64_UADDR64:
6834 case R_PPC64_TOC:
6835 break;
6836 }
6837
6838 if (local_syms != NULL)
6839 {
6840 unsigned long r_symndx;
6841 Elf_Internal_Sym *sym;
6842 bfd *ibfd = sec->owner;
6843
6844 r_symndx = ELF64_R_SYM (r_info);
6845 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6846 return FALSE;
6847 }
6848
6849 if ((info->shared
6850 && (must_be_dyn_reloc (info, r_type)
6851 || (h != NULL
6852 && (!info->symbolic
6853 || h->root.type == bfd_link_hash_defweak
6854 || !h->def_regular))))
6855 || (ELIMINATE_COPY_RELOCS
6856 && !info->shared
6857 && h != NULL
6858 && (h->root.type == bfd_link_hash_defweak
6859 || !h->def_regular)))
6860 ;
6861 else
6862 return TRUE;
6863
6864 if (h != NULL)
6865 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6866 else
6867 {
6868 if (sym_sec != NULL)
6869 {
6870 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6871 pp = (struct ppc_dyn_relocs **) vpp;
6872 }
6873 else
6874 {
6875 void *vpp = &elf_section_data (sec)->local_dynrel;
6876 pp = (struct ppc_dyn_relocs **) vpp;
6877 }
6878
6879 /* elf_gc_sweep may have already removed all dyn relocs associated
6880 with local syms for a given section. Don't report a dynreloc
6881 miscount. */
6882 if (*pp == NULL)
6883 return TRUE;
6884 }
6885
6886 while ((p = *pp) != NULL)
6887 {
6888 if (p->sec == sec)
6889 {
6890 if (!must_be_dyn_reloc (info, r_type))
6891 p->pc_count -= 1;
6892 p->count -= 1;
6893 if (p->count == 0)
6894 *pp = p->next;
6895 return TRUE;
6896 }
6897 pp = &p->next;
6898 }
6899
6900 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6901 sec->owner, sec);
6902 bfd_set_error (bfd_error_bad_value);
6903 return FALSE;
6904 }
6905
6906 /* Remove unused Official Procedure Descriptor entries. Currently we
6907 only remove those associated with functions in discarded link-once
6908 sections, or weakly defined functions that have been overridden. It
6909 would be possible to remove many more entries for statically linked
6910 applications. */
6911
6912 bfd_boolean
6913 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6914 {
6915 bfd *ibfd;
6916 bfd_boolean some_edited = FALSE;
6917 asection *need_pad = NULL;
6918
6919 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6920 {
6921 asection *sec;
6922 Elf_Internal_Rela *relstart, *rel, *relend;
6923 Elf_Internal_Shdr *symtab_hdr;
6924 Elf_Internal_Sym *local_syms;
6925 bfd_vma offset;
6926 struct _opd_sec_data *opd;
6927 bfd_boolean need_edit, add_aux_fields;
6928 bfd_size_type cnt_16b = 0;
6929
6930 if (!is_ppc64_elf (ibfd))
6931 continue;
6932
6933 sec = bfd_get_section_by_name (ibfd, ".opd");
6934 if (sec == NULL || sec->size == 0)
6935 continue;
6936
6937 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6938 continue;
6939
6940 if (sec->output_section == bfd_abs_section_ptr)
6941 continue;
6942
6943 /* Look through the section relocs. */
6944 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6945 continue;
6946
6947 local_syms = NULL;
6948 symtab_hdr = &elf_symtab_hdr (ibfd);
6949
6950 /* Read the relocations. */
6951 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6952 info->keep_memory);
6953 if (relstart == NULL)
6954 return FALSE;
6955
6956 /* First run through the relocs to check they are sane, and to
6957 determine whether we need to edit this opd section. */
6958 need_edit = FALSE;
6959 need_pad = sec;
6960 offset = 0;
6961 relend = relstart + sec->reloc_count;
6962 for (rel = relstart; rel < relend; )
6963 {
6964 enum elf_ppc64_reloc_type r_type;
6965 unsigned long r_symndx;
6966 asection *sym_sec;
6967 struct elf_link_hash_entry *h;
6968 Elf_Internal_Sym *sym;
6969
6970 /* .opd contains a regular array of 16 or 24 byte entries. We're
6971 only interested in the reloc pointing to a function entry
6972 point. */
6973 if (rel->r_offset != offset
6974 || rel + 1 >= relend
6975 || (rel + 1)->r_offset != offset + 8)
6976 {
6977 /* If someone messes with .opd alignment then after a
6978 "ld -r" we might have padding in the middle of .opd.
6979 Also, there's nothing to prevent someone putting
6980 something silly in .opd with the assembler. No .opd
6981 optimization for them! */
6982 broken_opd:
6983 (*_bfd_error_handler)
6984 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6985 need_edit = FALSE;
6986 break;
6987 }
6988
6989 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6990 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6991 {
6992 (*_bfd_error_handler)
6993 (_("%B: unexpected reloc type %u in .opd section"),
6994 ibfd, r_type);
6995 need_edit = FALSE;
6996 break;
6997 }
6998
6999 r_symndx = ELF64_R_SYM (rel->r_info);
7000 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7001 r_symndx, ibfd))
7002 goto error_ret;
7003
7004 if (sym_sec == NULL || sym_sec->owner == NULL)
7005 {
7006 const char *sym_name;
7007 if (h != NULL)
7008 sym_name = h->root.root.string;
7009 else
7010 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7011 sym_sec);
7012
7013 (*_bfd_error_handler)
7014 (_("%B: undefined sym `%s' in .opd section"),
7015 ibfd, sym_name);
7016 need_edit = FALSE;
7017 break;
7018 }
7019
7020 /* opd entries are always for functions defined in the
7021 current input bfd. If the symbol isn't defined in the
7022 input bfd, then we won't be using the function in this
7023 bfd; It must be defined in a linkonce section in another
7024 bfd, or is weak. It's also possible that we are
7025 discarding the function due to a linker script /DISCARD/,
7026 which we test for via the output_section. */
7027 if (sym_sec->owner != ibfd
7028 || sym_sec->output_section == bfd_abs_section_ptr)
7029 need_edit = TRUE;
7030
7031 rel += 2;
7032 if (rel == relend
7033 || (rel + 1 == relend && rel->r_offset == offset + 16))
7034 {
7035 if (sec->size == offset + 24)
7036 {
7037 need_pad = NULL;
7038 break;
7039 }
7040 if (rel == relend && sec->size == offset + 16)
7041 {
7042 cnt_16b++;
7043 break;
7044 }
7045 goto broken_opd;
7046 }
7047
7048 if (rel->r_offset == offset + 24)
7049 offset += 24;
7050 else if (rel->r_offset != offset + 16)
7051 goto broken_opd;
7052 else if (rel + 1 < relend
7053 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7054 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7055 {
7056 offset += 16;
7057 cnt_16b++;
7058 }
7059 else if (rel + 2 < relend
7060 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7061 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7062 {
7063 offset += 24;
7064 rel += 1;
7065 }
7066 else
7067 goto broken_opd;
7068 }
7069
7070 add_aux_fields = non_overlapping && cnt_16b > 0;
7071
7072 if (need_edit || add_aux_fields)
7073 {
7074 Elf_Internal_Rela *write_rel;
7075 bfd_byte *rptr, *wptr;
7076 bfd_byte *new_contents;
7077 bfd_boolean skip;
7078 long opd_ent_size;
7079 bfd_size_type amt;
7080
7081 new_contents = NULL;
7082 amt = sec->size * sizeof (long) / 8;
7083 opd = &ppc64_elf_section_data (sec)->u.opd;
7084 opd->adjust = bfd_zalloc (sec->owner, amt);
7085 if (opd->adjust == NULL)
7086 return FALSE;
7087 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7088
7089 /* This seems a waste of time as input .opd sections are all
7090 zeros as generated by gcc, but I suppose there's no reason
7091 this will always be so. We might start putting something in
7092 the third word of .opd entries. */
7093 if ((sec->flags & SEC_IN_MEMORY) == 0)
7094 {
7095 bfd_byte *loc;
7096 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7097 {
7098 if (loc != NULL)
7099 free (loc);
7100 error_ret:
7101 if (local_syms != NULL
7102 && symtab_hdr->contents != (unsigned char *) local_syms)
7103 free (local_syms);
7104 if (elf_section_data (sec)->relocs != relstart)
7105 free (relstart);
7106 return FALSE;
7107 }
7108 sec->contents = loc;
7109 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7110 }
7111
7112 elf_section_data (sec)->relocs = relstart;
7113
7114 new_contents = sec->contents;
7115 if (add_aux_fields)
7116 {
7117 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7118 if (new_contents == NULL)
7119 return FALSE;
7120 need_pad = FALSE;
7121 }
7122 wptr = new_contents;
7123 rptr = sec->contents;
7124
7125 write_rel = relstart;
7126 skip = FALSE;
7127 offset = 0;
7128 opd_ent_size = 0;
7129 for (rel = relstart; rel < relend; rel++)
7130 {
7131 unsigned long r_symndx;
7132 asection *sym_sec;
7133 struct elf_link_hash_entry *h;
7134 Elf_Internal_Sym *sym;
7135
7136 r_symndx = ELF64_R_SYM (rel->r_info);
7137 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7138 r_symndx, ibfd))
7139 goto error_ret;
7140
7141 if (rel->r_offset == offset)
7142 {
7143 struct ppc_link_hash_entry *fdh = NULL;
7144
7145 /* See if the .opd entry is full 24 byte or
7146 16 byte (with fd_aux entry overlapped with next
7147 fd_func). */
7148 opd_ent_size = 24;
7149 if ((rel + 2 == relend && sec->size == offset + 16)
7150 || (rel + 3 < relend
7151 && rel[2].r_offset == offset + 16
7152 && rel[3].r_offset == offset + 24
7153 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7154 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7155 opd_ent_size = 16;
7156
7157 if (h != NULL
7158 && h->root.root.string[0] == '.')
7159 {
7160 struct ppc_link_hash_table *htab;
7161
7162 htab = ppc_hash_table (info);
7163 if (htab != NULL)
7164 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7165 htab);
7166 if (fdh != NULL
7167 && fdh->elf.root.type != bfd_link_hash_defined
7168 && fdh->elf.root.type != bfd_link_hash_defweak)
7169 fdh = NULL;
7170 }
7171
7172 skip = (sym_sec->owner != ibfd
7173 || sym_sec->output_section == bfd_abs_section_ptr);
7174 if (skip)
7175 {
7176 if (fdh != NULL && sym_sec->owner == ibfd)
7177 {
7178 /* Arrange for the function descriptor sym
7179 to be dropped. */
7180 fdh->elf.root.u.def.value = 0;
7181 fdh->elf.root.u.def.section = sym_sec;
7182 }
7183 opd->adjust[rel->r_offset / 8] = -1;
7184 }
7185 else
7186 {
7187 /* We'll be keeping this opd entry. */
7188
7189 if (fdh != NULL)
7190 {
7191 /* Redefine the function descriptor symbol to
7192 this location in the opd section. It is
7193 necessary to update the value here rather
7194 than using an array of adjustments as we do
7195 for local symbols, because various places
7196 in the generic ELF code use the value
7197 stored in u.def.value. */
7198 fdh->elf.root.u.def.value = wptr - new_contents;
7199 fdh->adjust_done = 1;
7200 }
7201
7202 /* Local syms are a bit tricky. We could
7203 tweak them as they can be cached, but
7204 we'd need to look through the local syms
7205 for the function descriptor sym which we
7206 don't have at the moment. So keep an
7207 array of adjustments. */
7208 opd->adjust[rel->r_offset / 8]
7209 = (wptr - new_contents) - (rptr - sec->contents);
7210
7211 if (wptr != rptr)
7212 memcpy (wptr, rptr, opd_ent_size);
7213 wptr += opd_ent_size;
7214 if (add_aux_fields && opd_ent_size == 16)
7215 {
7216 memset (wptr, '\0', 8);
7217 wptr += 8;
7218 }
7219 }
7220 rptr += opd_ent_size;
7221 offset += opd_ent_size;
7222 }
7223
7224 if (skip)
7225 {
7226 if (!NO_OPD_RELOCS
7227 && !info->relocatable
7228 && !dec_dynrel_count (rel->r_info, sec, info,
7229 NULL, h, sym_sec))
7230 goto error_ret;
7231 }
7232 else
7233 {
7234 /* We need to adjust any reloc offsets to point to the
7235 new opd entries. While we're at it, we may as well
7236 remove redundant relocs. */
7237 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7238 if (write_rel != rel)
7239 memcpy (write_rel, rel, sizeof (*rel));
7240 ++write_rel;
7241 }
7242 }
7243
7244 sec->size = wptr - new_contents;
7245 sec->reloc_count = write_rel - relstart;
7246 if (add_aux_fields)
7247 {
7248 free (sec->contents);
7249 sec->contents = new_contents;
7250 }
7251
7252 /* Fudge the header size too, as this is used later in
7253 elf_bfd_final_link if we are emitting relocs. */
7254 elf_section_data (sec)->rel_hdr.sh_size
7255 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7256 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7257 some_edited = TRUE;
7258 }
7259 else if (elf_section_data (sec)->relocs != relstart)
7260 free (relstart);
7261
7262 if (local_syms != NULL
7263 && symtab_hdr->contents != (unsigned char *) local_syms)
7264 {
7265 if (!info->keep_memory)
7266 free (local_syms);
7267 else
7268 symtab_hdr->contents = (unsigned char *) local_syms;
7269 }
7270 }
7271
7272 if (some_edited)
7273 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7274
7275 /* If we are doing a final link and the last .opd entry is just 16 byte
7276 long, add a 8 byte padding after it. */
7277 if (need_pad != NULL && !info->relocatable)
7278 {
7279 bfd_byte *p;
7280
7281 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7282 {
7283 BFD_ASSERT (need_pad->size > 0);
7284
7285 p = bfd_malloc (need_pad->size + 8);
7286 if (p == NULL)
7287 return FALSE;
7288
7289 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7290 p, 0, need_pad->size))
7291 return FALSE;
7292
7293 need_pad->contents = p;
7294 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7295 }
7296 else
7297 {
7298 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7299 if (p == NULL)
7300 return FALSE;
7301
7302 need_pad->contents = p;
7303 }
7304
7305 memset (need_pad->contents + need_pad->size, 0, 8);
7306 need_pad->size += 8;
7307 }
7308
7309 return TRUE;
7310 }
7311
7312 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7313
7314 asection *
7315 ppc64_elf_tls_setup (struct bfd_link_info *info,
7316 int no_tls_get_addr_opt,
7317 int *no_multi_toc)
7318 {
7319 struct ppc_link_hash_table *htab;
7320
7321 htab = ppc_hash_table (info);
7322 if (htab == NULL)
7323 return NULL;
7324
7325 if (*no_multi_toc)
7326 htab->do_multi_toc = 0;
7327 else if (!htab->do_multi_toc)
7328 *no_multi_toc = 1;
7329
7330 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7331 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7332 FALSE, FALSE, TRUE));
7333 /* Move dynamic linking info to the function descriptor sym. */
7334 if (htab->tls_get_addr != NULL)
7335 func_desc_adjust (&htab->tls_get_addr->elf, info);
7336 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7337 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7338 FALSE, FALSE, TRUE));
7339 if (!no_tls_get_addr_opt)
7340 {
7341 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7342
7343 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7344 FALSE, FALSE, TRUE);
7345 if (opt != NULL)
7346 func_desc_adjust (opt, info);
7347 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7348 FALSE, FALSE, TRUE);
7349 if (opt_fd != NULL
7350 && (opt_fd->root.type == bfd_link_hash_defined
7351 || opt_fd->root.type == bfd_link_hash_defweak))
7352 {
7353 /* If glibc supports an optimized __tls_get_addr call stub,
7354 signalled by the presence of __tls_get_addr_opt, and we'll
7355 be calling __tls_get_addr via a plt call stub, then
7356 make __tls_get_addr point to __tls_get_addr_opt. */
7357 tga_fd = &htab->tls_get_addr_fd->elf;
7358 if (htab->elf.dynamic_sections_created
7359 && tga_fd != NULL
7360 && (tga_fd->type == STT_FUNC
7361 || tga_fd->needs_plt)
7362 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7363 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7364 && tga_fd->root.type == bfd_link_hash_undefweak)))
7365 {
7366 struct plt_entry *ent;
7367
7368 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7369 if (ent->plt.refcount > 0)
7370 break;
7371 if (ent != NULL)
7372 {
7373 tga_fd->root.type = bfd_link_hash_indirect;
7374 tga_fd->root.u.i.link = &opt_fd->root;
7375 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7376 if (opt_fd->dynindx != -1)
7377 {
7378 /* Use __tls_get_addr_opt in dynamic relocations. */
7379 opt_fd->dynindx = -1;
7380 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7381 opt_fd->dynstr_index);
7382 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7383 return NULL;
7384 }
7385 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7386 tga = &htab->tls_get_addr->elf;
7387 if (opt != NULL && tga != NULL)
7388 {
7389 tga->root.type = bfd_link_hash_indirect;
7390 tga->root.u.i.link = &opt->root;
7391 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7392 _bfd_elf_link_hash_hide_symbol (info, opt,
7393 tga->forced_local);
7394 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7395 }
7396 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7397 htab->tls_get_addr_fd->is_func_descriptor = 1;
7398 if (htab->tls_get_addr != NULL)
7399 {
7400 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7401 htab->tls_get_addr->is_func = 1;
7402 }
7403 }
7404 }
7405 }
7406 else
7407 no_tls_get_addr_opt = TRUE;
7408 }
7409 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7410 return _bfd_elf_tls_setup (info->output_bfd, info);
7411 }
7412
7413 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7414 HASH1 or HASH2. */
7415
7416 static bfd_boolean
7417 branch_reloc_hash_match (const bfd *ibfd,
7418 const Elf_Internal_Rela *rel,
7419 const struct ppc_link_hash_entry *hash1,
7420 const struct ppc_link_hash_entry *hash2)
7421 {
7422 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7423 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7424 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7425
7426 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7427 {
7428 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7429 struct elf_link_hash_entry *h;
7430
7431 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7432 h = elf_follow_link (h);
7433 if (h == &hash1->elf || h == &hash2->elf)
7434 return TRUE;
7435 }
7436 return FALSE;
7437 }
7438
7439 /* Run through all the TLS relocs looking for optimization
7440 opportunities. The linker has been hacked (see ppc64elf.em) to do
7441 a preliminary section layout so that we know the TLS segment
7442 offsets. We can't optimize earlier because some optimizations need
7443 to know the tp offset, and we need to optimize before allocating
7444 dynamic relocations. */
7445
7446 bfd_boolean
7447 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7448 {
7449 bfd *ibfd;
7450 asection *sec;
7451 struct ppc_link_hash_table *htab;
7452 int pass;
7453
7454 if (info->relocatable || !info->executable)
7455 return TRUE;
7456
7457 htab = ppc_hash_table (info);
7458 if (htab == NULL)
7459 return FALSE;
7460
7461 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7462 {
7463 Elf_Internal_Sym *locsyms = NULL;
7464 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7465 unsigned char *toc_ref = NULL;
7466
7467 /* Look at all the sections for this file. Make two passes over
7468 the relocs. On the first pass, mark toc entries involved
7469 with tls relocs, and check that tls relocs involved in
7470 setting up a tls_get_addr call are indeed followed by such a
7471 call. If they are not, exclude them from the optimizations
7472 done on the second pass. */
7473 for (pass = 0; pass < 2; ++pass)
7474 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7475 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7476 {
7477 Elf_Internal_Rela *relstart, *rel, *relend;
7478
7479 /* Read the relocations. */
7480 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7481 info->keep_memory);
7482 if (relstart == NULL)
7483 return FALSE;
7484
7485 relend = relstart + sec->reloc_count;
7486 for (rel = relstart; rel < relend; rel++)
7487 {
7488 enum elf_ppc64_reloc_type r_type;
7489 unsigned long r_symndx;
7490 struct elf_link_hash_entry *h;
7491 Elf_Internal_Sym *sym;
7492 asection *sym_sec;
7493 unsigned char *tls_mask;
7494 unsigned char tls_set, tls_clear, tls_type = 0;
7495 bfd_vma value;
7496 bfd_boolean ok_tprel, is_local;
7497 long toc_ref_index = 0;
7498 int expecting_tls_get_addr = 0;
7499
7500 r_symndx = ELF64_R_SYM (rel->r_info);
7501 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7502 r_symndx, ibfd))
7503 {
7504 err_free_rel:
7505 if (elf_section_data (sec)->relocs != relstart)
7506 free (relstart);
7507 if (toc_ref != NULL)
7508 free (toc_ref);
7509 if (locsyms != NULL
7510 && (elf_symtab_hdr (ibfd).contents
7511 != (unsigned char *) locsyms))
7512 free (locsyms);
7513 return FALSE;
7514 }
7515
7516 if (h != NULL)
7517 {
7518 if (h->root.type == bfd_link_hash_defined
7519 || h->root.type == bfd_link_hash_defweak)
7520 value = h->root.u.def.value;
7521 else if (h->root.type == bfd_link_hash_undefweak)
7522 value = 0;
7523 else
7524 continue;
7525 }
7526 else
7527 /* Symbols referenced by TLS relocs must be of type
7528 STT_TLS. So no need for .opd local sym adjust. */
7529 value = sym->st_value;
7530
7531 ok_tprel = FALSE;
7532 is_local = FALSE;
7533 if (h == NULL
7534 || !h->def_dynamic)
7535 {
7536 is_local = TRUE;
7537 if (h != NULL
7538 && h->root.type == bfd_link_hash_undefweak)
7539 ok_tprel = TRUE;
7540 else
7541 {
7542 value += sym_sec->output_offset;
7543 value += sym_sec->output_section->vma;
7544 value -= htab->elf.tls_sec->vma;
7545 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7546 < (bfd_vma) 1 << 32);
7547 }
7548 }
7549
7550 r_type = ELF64_R_TYPE (rel->r_info);
7551 switch (r_type)
7552 {
7553 case R_PPC64_GOT_TLSLD16:
7554 case R_PPC64_GOT_TLSLD16_LO:
7555 expecting_tls_get_addr = 1;
7556 /* Fall thru */
7557
7558 case R_PPC64_GOT_TLSLD16_HI:
7559 case R_PPC64_GOT_TLSLD16_HA:
7560 /* These relocs should never be against a symbol
7561 defined in a shared lib. Leave them alone if
7562 that turns out to be the case. */
7563 if (!is_local)
7564 continue;
7565
7566 /* LD -> LE */
7567 tls_set = 0;
7568 tls_clear = TLS_LD;
7569 tls_type = TLS_TLS | TLS_LD;
7570 break;
7571
7572 case R_PPC64_GOT_TLSGD16:
7573 case R_PPC64_GOT_TLSGD16_LO:
7574 expecting_tls_get_addr = 1;
7575 /* Fall thru */
7576
7577 case R_PPC64_GOT_TLSGD16_HI:
7578 case R_PPC64_GOT_TLSGD16_HA:
7579 if (ok_tprel)
7580 /* GD -> LE */
7581 tls_set = 0;
7582 else
7583 /* GD -> IE */
7584 tls_set = TLS_TLS | TLS_TPRELGD;
7585 tls_clear = TLS_GD;
7586 tls_type = TLS_TLS | TLS_GD;
7587 break;
7588
7589 case R_PPC64_GOT_TPREL16_DS:
7590 case R_PPC64_GOT_TPREL16_LO_DS:
7591 case R_PPC64_GOT_TPREL16_HI:
7592 case R_PPC64_GOT_TPREL16_HA:
7593 if (ok_tprel)
7594 {
7595 /* IE -> LE */
7596 tls_set = 0;
7597 tls_clear = TLS_TPREL;
7598 tls_type = TLS_TLS | TLS_TPREL;
7599 break;
7600 }
7601 continue;
7602
7603 case R_PPC64_TOC16:
7604 case R_PPC64_TOC16_LO:
7605 case R_PPC64_TLS:
7606 case R_PPC64_TLSGD:
7607 case R_PPC64_TLSLD:
7608 if (sym_sec == NULL || sym_sec != toc)
7609 continue;
7610
7611 /* Mark this toc entry as referenced by a TLS
7612 code sequence. We can do that now in the
7613 case of R_PPC64_TLS, and after checking for
7614 tls_get_addr for the TOC16 relocs. */
7615 if (toc_ref == NULL)
7616 {
7617 toc_ref = bfd_zmalloc (toc->size / 8);
7618 if (toc_ref == NULL)
7619 goto err_free_rel;
7620 }
7621 if (h != NULL)
7622 value = h->root.u.def.value;
7623 else
7624 value = sym->st_value;
7625 value += rel->r_addend;
7626 BFD_ASSERT (value < toc->size && value % 8 == 0);
7627 toc_ref_index = value / 8;
7628 if (r_type == R_PPC64_TLS
7629 || r_type == R_PPC64_TLSGD
7630 || r_type == R_PPC64_TLSLD)
7631 {
7632 toc_ref[toc_ref_index] = 1;
7633 continue;
7634 }
7635
7636 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7637 continue;
7638
7639 tls_set = 0;
7640 tls_clear = 0;
7641 expecting_tls_get_addr = 2;
7642 break;
7643
7644 case R_PPC64_TPREL64:
7645 if (pass == 0
7646 || sec != toc
7647 || toc_ref == NULL
7648 || !toc_ref[rel->r_offset / 8])
7649 continue;
7650 if (ok_tprel)
7651 {
7652 /* IE -> LE */
7653 tls_set = TLS_EXPLICIT;
7654 tls_clear = TLS_TPREL;
7655 break;
7656 }
7657 continue;
7658
7659 case R_PPC64_DTPMOD64:
7660 if (pass == 0
7661 || sec != toc
7662 || toc_ref == NULL
7663 || !toc_ref[rel->r_offset / 8])
7664 continue;
7665 if (rel + 1 < relend
7666 && (rel[1].r_info
7667 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7668 && rel[1].r_offset == rel->r_offset + 8)
7669 {
7670 if (ok_tprel)
7671 /* GD -> LE */
7672 tls_set = TLS_EXPLICIT | TLS_GD;
7673 else
7674 /* GD -> IE */
7675 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7676 tls_clear = TLS_GD;
7677 }
7678 else
7679 {
7680 if (!is_local)
7681 continue;
7682
7683 /* LD -> LE */
7684 tls_set = TLS_EXPLICIT;
7685 tls_clear = TLS_LD;
7686 }
7687 break;
7688
7689 default:
7690 continue;
7691 }
7692
7693 if (pass == 0)
7694 {
7695 if (!expecting_tls_get_addr
7696 || !sec->has_tls_get_addr_call)
7697 continue;
7698
7699 if (rel + 1 < relend
7700 && branch_reloc_hash_match (ibfd, rel + 1,
7701 htab->tls_get_addr,
7702 htab->tls_get_addr_fd))
7703 {
7704 if (expecting_tls_get_addr == 2)
7705 {
7706 /* Check for toc tls entries. */
7707 unsigned char *toc_tls;
7708 int retval;
7709
7710 retval = get_tls_mask (&toc_tls, NULL, NULL,
7711 &locsyms,
7712 rel, ibfd);
7713 if (retval == 0)
7714 goto err_free_rel;
7715 if (retval > 1 && toc_tls != NULL)
7716 toc_ref[toc_ref_index] = 1;
7717 }
7718 continue;
7719 }
7720
7721 if (expecting_tls_get_addr != 1)
7722 continue;
7723
7724 /* Uh oh, we didn't find the expected call. We
7725 could just mark this symbol to exclude it
7726 from tls optimization but it's safer to skip
7727 the entire section. */
7728 sec->has_tls_reloc = 0;
7729 break;
7730 }
7731
7732 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7733 {
7734 struct plt_entry *ent;
7735 for (ent = htab->tls_get_addr->elf.plt.plist;
7736 ent != NULL;
7737 ent = ent->next)
7738 if (ent->addend == 0)
7739 {
7740 if (ent->plt.refcount > 0)
7741 {
7742 ent->plt.refcount -= 1;
7743 expecting_tls_get_addr = 0;
7744 }
7745 break;
7746 }
7747 }
7748
7749 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7750 {
7751 struct plt_entry *ent;
7752 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7753 ent != NULL;
7754 ent = ent->next)
7755 if (ent->addend == 0)
7756 {
7757 if (ent->plt.refcount > 0)
7758 ent->plt.refcount -= 1;
7759 break;
7760 }
7761 }
7762
7763 if (tls_clear == 0)
7764 continue;
7765
7766 if ((tls_set & TLS_EXPLICIT) == 0)
7767 {
7768 struct got_entry *ent;
7769
7770 /* Adjust got entry for this reloc. */
7771 if (h != NULL)
7772 ent = h->got.glist;
7773 else
7774 ent = elf_local_got_ents (ibfd)[r_symndx];
7775
7776 for (; ent != NULL; ent = ent->next)
7777 if (ent->addend == rel->r_addend
7778 && ent->owner == ibfd
7779 && ent->tls_type == tls_type)
7780 break;
7781 if (ent == NULL)
7782 abort ();
7783
7784 if (tls_set == 0)
7785 {
7786 /* We managed to get rid of a got entry. */
7787 if (ent->got.refcount > 0)
7788 ent->got.refcount -= 1;
7789 }
7790 }
7791 else
7792 {
7793 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7794 we'll lose one or two dyn relocs. */
7795 if (!dec_dynrel_count (rel->r_info, sec, info,
7796 NULL, h, sym_sec))
7797 return FALSE;
7798
7799 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7800 {
7801 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7802 NULL, h, sym_sec))
7803 return FALSE;
7804 }
7805 }
7806
7807 *tls_mask |= tls_set;
7808 *tls_mask &= ~tls_clear;
7809 }
7810
7811 if (elf_section_data (sec)->relocs != relstart)
7812 free (relstart);
7813 }
7814
7815 if (toc_ref != NULL)
7816 free (toc_ref);
7817
7818 if (locsyms != NULL
7819 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7820 {
7821 if (!info->keep_memory)
7822 free (locsyms);
7823 else
7824 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7825 }
7826 }
7827 return TRUE;
7828 }
7829
7830 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7831 the values of any global symbols in a toc section that has been
7832 edited. Globals in toc sections should be a rarity, so this function
7833 sets a flag if any are found in toc sections other than the one just
7834 edited, so that futher hash table traversals can be avoided. */
7835
7836 struct adjust_toc_info
7837 {
7838 asection *toc;
7839 unsigned long *skip;
7840 bfd_boolean global_toc_syms;
7841 };
7842
7843 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7844
7845 static bfd_boolean
7846 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7847 {
7848 struct ppc_link_hash_entry *eh;
7849 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7850 unsigned long i;
7851
7852 if (h->root.type == bfd_link_hash_indirect)
7853 return TRUE;
7854
7855 if (h->root.type == bfd_link_hash_warning)
7856 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7857
7858 if (h->root.type != bfd_link_hash_defined
7859 && h->root.type != bfd_link_hash_defweak)
7860 return TRUE;
7861
7862 eh = (struct ppc_link_hash_entry *) h;
7863 if (eh->adjust_done)
7864 return TRUE;
7865
7866 if (eh->elf.root.u.def.section == toc_inf->toc)
7867 {
7868 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7869 i = toc_inf->toc->rawsize >> 3;
7870 else
7871 i = eh->elf.root.u.def.value >> 3;
7872
7873 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7874 {
7875 (*_bfd_error_handler)
7876 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7877 do
7878 ++i;
7879 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7880 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7881 }
7882
7883 eh->elf.root.u.def.value -= toc_inf->skip[i];
7884 eh->adjust_done = 1;
7885 }
7886 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7887 toc_inf->global_toc_syms = TRUE;
7888
7889 return TRUE;
7890 }
7891
7892 /* Examine all relocs referencing .toc sections in order to remove
7893 unused .toc entries. */
7894
7895 bfd_boolean
7896 ppc64_elf_edit_toc (struct bfd_link_info *info)
7897 {
7898 bfd *ibfd;
7899 struct adjust_toc_info toc_inf;
7900 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7901
7902 htab->do_toc_opt = 1;
7903 toc_inf.global_toc_syms = TRUE;
7904 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7905 {
7906 asection *toc, *sec;
7907 Elf_Internal_Shdr *symtab_hdr;
7908 Elf_Internal_Sym *local_syms;
7909 Elf_Internal_Rela *relstart, *rel;
7910 unsigned long *skip, *drop;
7911 unsigned char *used;
7912 unsigned char *keep, last, some_unused;
7913
7914 if (!is_ppc64_elf (ibfd))
7915 continue;
7916
7917 toc = bfd_get_section_by_name (ibfd, ".toc");
7918 if (toc == NULL
7919 || toc->size == 0
7920 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7921 || elf_discarded_section (toc))
7922 continue;
7923
7924 local_syms = NULL;
7925 symtab_hdr = &elf_symtab_hdr (ibfd);
7926
7927 /* Look at sections dropped from the final link. */
7928 skip = NULL;
7929 relstart = NULL;
7930 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7931 {
7932 if (sec->reloc_count == 0
7933 || !elf_discarded_section (sec)
7934 || get_opd_info (sec)
7935 || (sec->flags & SEC_ALLOC) == 0
7936 || (sec->flags & SEC_DEBUGGING) != 0)
7937 continue;
7938
7939 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7940 if (relstart == NULL)
7941 goto error_ret;
7942
7943 /* Run through the relocs to see which toc entries might be
7944 unused. */
7945 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7946 {
7947 enum elf_ppc64_reloc_type r_type;
7948 unsigned long r_symndx;
7949 asection *sym_sec;
7950 struct elf_link_hash_entry *h;
7951 Elf_Internal_Sym *sym;
7952 bfd_vma val;
7953
7954 r_type = ELF64_R_TYPE (rel->r_info);
7955 switch (r_type)
7956 {
7957 default:
7958 continue;
7959
7960 case R_PPC64_TOC16:
7961 case R_PPC64_TOC16_LO:
7962 case R_PPC64_TOC16_HI:
7963 case R_PPC64_TOC16_HA:
7964 case R_PPC64_TOC16_DS:
7965 case R_PPC64_TOC16_LO_DS:
7966 break;
7967 }
7968
7969 r_symndx = ELF64_R_SYM (rel->r_info);
7970 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7971 r_symndx, ibfd))
7972 goto error_ret;
7973
7974 if (sym_sec != toc)
7975 continue;
7976
7977 if (h != NULL)
7978 val = h->root.u.def.value;
7979 else
7980 val = sym->st_value;
7981 val += rel->r_addend;
7982
7983 if (val >= toc->size)
7984 continue;
7985
7986 /* Anything in the toc ought to be aligned to 8 bytes.
7987 If not, don't mark as unused. */
7988 if (val & 7)
7989 continue;
7990
7991 if (skip == NULL)
7992 {
7993 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
7994 if (skip == NULL)
7995 goto error_ret;
7996 }
7997
7998 skip[val >> 3] = ref_from_discarded;
7999 }
8000
8001 if (elf_section_data (sec)->relocs != relstart)
8002 free (relstart);
8003 }
8004
8005 /* For largetoc loads of address constants, we can convert
8006 . addis rx,2,addr@got@ha
8007 . ld ry,addr@got@l(rx)
8008 to
8009 . addis rx,2,addr@toc@ha
8010 . addi ry,rx,addr@toc@l
8011 when addr is within 2G of the toc pointer. This then means
8012 that the word storing "addr" in the toc is no longer needed. */
8013
8014 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8015 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8016 && toc->reloc_count != 0)
8017 {
8018 /* Read toc relocs. */
8019 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8020 info->keep_memory);
8021 if (relstart == NULL)
8022 goto error_ret;
8023
8024 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8025 {
8026 enum elf_ppc64_reloc_type r_type;
8027 unsigned long r_symndx;
8028 asection *sym_sec;
8029 struct elf_link_hash_entry *h;
8030 Elf_Internal_Sym *sym;
8031 bfd_vma val, addr;
8032
8033 r_type = ELF64_R_TYPE (rel->r_info);
8034 if (r_type != R_PPC64_ADDR64)
8035 continue;
8036
8037 r_symndx = ELF64_R_SYM (rel->r_info);
8038 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8039 r_symndx, ibfd))
8040 goto error_ret;
8041
8042 if (!SYMBOL_CALLS_LOCAL (info, h))
8043 continue;
8044
8045 if (h != NULL)
8046 {
8047 if (h->type == STT_GNU_IFUNC)
8048 continue;
8049 val = h->root.u.def.value;
8050 }
8051 else
8052 {
8053 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8054 continue;
8055 val = sym->st_value;
8056 }
8057 val += rel->r_addend;
8058 val += sym_sec->output_section->vma + sym_sec->output_offset;
8059
8060 /* We don't yet know the exact toc pointer value, but we
8061 know it will be somewhere in the toc section. Don't
8062 optimize if the difference from any possible toc
8063 pointer is outside [ff..f80008000, 7fff7fff]. */
8064 addr = toc->output_section->vma + TOC_BASE_OFF;
8065 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8066 continue;
8067
8068 addr = toc->output_section->vma + toc->output_section->rawsize;
8069 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8070 continue;
8071
8072 if (skip == NULL)
8073 {
8074 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8075 if (skip == NULL)
8076 goto error_ret;
8077 }
8078
8079 skip[rel->r_offset >> 3]
8080 |= can_optimize | ((rel - relstart) << 2);
8081 }
8082
8083 if (elf_section_data (toc)->relocs != relstart)
8084 free (relstart);
8085 }
8086
8087 if (skip == NULL)
8088 continue;
8089
8090 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8091 if (used == NULL)
8092 {
8093 error_ret:
8094 if (local_syms != NULL
8095 && symtab_hdr->contents != (unsigned char *) local_syms)
8096 free (local_syms);
8097 if (sec != NULL
8098 && relstart != NULL
8099 && elf_section_data (sec)->relocs != relstart)
8100 free (relstart);
8101 if (skip != NULL)
8102 free (skip);
8103 return FALSE;
8104 }
8105
8106 /* Now check all kept sections that might reference the toc.
8107 Check the toc itself last. */
8108 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8109 : ibfd->sections);
8110 sec != NULL;
8111 sec = (sec == toc ? NULL
8112 : sec->next == NULL ? toc
8113 : sec->next == toc && toc->next ? toc->next
8114 : sec->next))
8115 {
8116 int repeat;
8117
8118 if (sec->reloc_count == 0
8119 || elf_discarded_section (sec)
8120 || get_opd_info (sec)
8121 || (sec->flags & SEC_ALLOC) == 0
8122 || (sec->flags & SEC_DEBUGGING) != 0)
8123 continue;
8124
8125 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8126 info->keep_memory);
8127 if (relstart == NULL)
8128 goto error_ret;
8129
8130 /* Mark toc entries referenced as used. */
8131 repeat = 0;
8132 do
8133 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8134 {
8135 enum elf_ppc64_reloc_type r_type;
8136 unsigned long r_symndx;
8137 asection *sym_sec;
8138 struct elf_link_hash_entry *h;
8139 Elf_Internal_Sym *sym;
8140 bfd_vma val;
8141
8142 r_type = ELF64_R_TYPE (rel->r_info);
8143 switch (r_type)
8144 {
8145 case R_PPC64_TOC16:
8146 case R_PPC64_TOC16_LO:
8147 case R_PPC64_TOC16_HI:
8148 case R_PPC64_TOC16_HA:
8149 case R_PPC64_TOC16_DS:
8150 case R_PPC64_TOC16_LO_DS:
8151 /* In case we're taking addresses of toc entries. */
8152 case R_PPC64_ADDR64:
8153 break;
8154
8155 default:
8156 continue;
8157 }
8158
8159 r_symndx = ELF64_R_SYM (rel->r_info);
8160 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8161 r_symndx, ibfd))
8162 {
8163 free (used);
8164 goto error_ret;
8165 }
8166
8167 if (sym_sec != toc)
8168 continue;
8169
8170 if (h != NULL)
8171 val = h->root.u.def.value;
8172 else
8173 val = sym->st_value;
8174 val += rel->r_addend;
8175
8176 if (val >= toc->size)
8177 continue;
8178
8179 if ((skip[val >> 3] & can_optimize) != 0)
8180 {
8181 bfd_vma off;
8182 unsigned char opc;
8183
8184 switch (r_type)
8185 {
8186 case R_PPC64_TOC16_HA:
8187 break;
8188
8189 case R_PPC64_TOC16_LO_DS:
8190 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8191 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8192 return FALSE;
8193 if ((opc & (0x3f << 2)) == (58u << 2))
8194 break;
8195 /* Fall thru */
8196
8197 default:
8198 /* Wrong sort of reloc, or not a ld. We may
8199 as well clear ref_from_discarded too. */
8200 skip[val >> 3] = 0;
8201 }
8202 }
8203
8204 /* For the toc section, we only mark as used if
8205 this entry itself isn't unused. */
8206 if (sec == toc
8207 && !used[val >> 3]
8208 && (used[rel->r_offset >> 3]
8209 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8210 /* Do all the relocs again, to catch reference
8211 chains. */
8212 repeat = 1;
8213
8214 used[val >> 3] = 1;
8215 }
8216 while (repeat);
8217
8218 if (elf_section_data (sec)->relocs != relstart)
8219 free (relstart);
8220 }
8221
8222 /* Merge the used and skip arrays. Assume that TOC
8223 doublewords not appearing as either used or unused belong
8224 to to an entry more than one doubleword in size. */
8225 for (drop = skip, keep = used, last = 0, some_unused = 0;
8226 drop < skip + (toc->size + 7) / 8;
8227 ++drop, ++keep)
8228 {
8229 if (*keep)
8230 {
8231 *drop &= ~ref_from_discarded;
8232 if ((*drop & can_optimize) != 0)
8233 some_unused = 1;
8234 last = 0;
8235 }
8236 else if (*drop)
8237 {
8238 some_unused = 1;
8239 last = ref_from_discarded;
8240 }
8241 else
8242 *drop = last;
8243 }
8244
8245 free (used);
8246
8247 if (some_unused)
8248 {
8249 bfd_byte *contents, *src;
8250 unsigned long off;
8251 bfd_boolean local_toc_syms = FALSE;
8252
8253 /* Shuffle the toc contents, and at the same time convert the
8254 skip array from booleans into offsets. */
8255 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8256 goto error_ret;
8257
8258 elf_section_data (toc)->this_hdr.contents = contents;
8259
8260 for (src = contents, off = 0, drop = skip;
8261 src < contents + toc->size;
8262 src += 8, ++drop)
8263 {
8264 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8265 off += 8;
8266 else if (off != 0)
8267 {
8268 *drop = off;
8269 memcpy (src - off, src, 8);
8270 }
8271 }
8272 *drop = off;
8273 toc->rawsize = toc->size;
8274 toc->size = src - contents - off;
8275
8276 /* Adjust addends for relocs against the toc section sym,
8277 and optimize any accesses we can. */
8278 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8279 {
8280 if (sec->reloc_count == 0
8281 || elf_discarded_section (sec))
8282 continue;
8283
8284 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8285 info->keep_memory);
8286 if (relstart == NULL)
8287 goto error_ret;
8288
8289 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8290 {
8291 enum elf_ppc64_reloc_type r_type;
8292 unsigned long r_symndx;
8293 asection *sym_sec;
8294 struct elf_link_hash_entry *h;
8295 Elf_Internal_Sym *sym;
8296 bfd_vma val;
8297
8298 r_type = ELF64_R_TYPE (rel->r_info);
8299 switch (r_type)
8300 {
8301 default:
8302 continue;
8303
8304 case R_PPC64_TOC16:
8305 case R_PPC64_TOC16_LO:
8306 case R_PPC64_TOC16_HI:
8307 case R_PPC64_TOC16_HA:
8308 case R_PPC64_TOC16_DS:
8309 case R_PPC64_TOC16_LO_DS:
8310 case R_PPC64_ADDR64:
8311 break;
8312 }
8313
8314 r_symndx = ELF64_R_SYM (rel->r_info);
8315 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8316 r_symndx, ibfd))
8317 goto error_ret;
8318
8319 if (sym_sec != toc)
8320 continue;
8321
8322 if (h != NULL)
8323 val = h->root.u.def.value;
8324 else
8325 {
8326 val = sym->st_value;
8327 if (val != 0)
8328 local_toc_syms = TRUE;
8329 }
8330
8331 val += rel->r_addend;
8332
8333 if (val > toc->rawsize)
8334 val = toc->rawsize;
8335 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8336 continue;
8337 else if ((skip[val >> 3] & can_optimize) != 0)
8338 {
8339 Elf_Internal_Rela *tocrel
8340 = elf_section_data (toc)->relocs + (skip[val >> 3] >> 2);
8341 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8342
8343 switch (r_type)
8344 {
8345 case R_PPC64_TOC16_HA:
8346 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8347 break;
8348
8349 case R_PPC64_TOC16_LO_DS:
8350 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8351 break;
8352
8353 default:
8354 abort ();
8355 }
8356 rel->r_addend = tocrel->r_addend;
8357 elf_section_data (sec)->relocs = relstart;
8358 continue;
8359 }
8360
8361 if (h != NULL || sym->st_value != 0)
8362 continue;
8363
8364 rel->r_addend -= skip[val >> 3];
8365 elf_section_data (sec)->relocs = relstart;
8366 }
8367
8368 if (elf_section_data (sec)->relocs != relstart)
8369 free (relstart);
8370 }
8371
8372 /* We shouldn't have local or global symbols defined in the TOC,
8373 but handle them anyway. */
8374 if (local_toc_syms)
8375 {
8376 Elf_Internal_Sym *sym;
8377
8378 for (sym = local_syms;
8379 sym < local_syms + symtab_hdr->sh_info;
8380 ++sym)
8381 if (sym->st_value != 0
8382 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8383 {
8384 unsigned long i;
8385
8386 if (sym->st_value > toc->rawsize)
8387 i = toc->rawsize >> 3;
8388 else
8389 i = sym->st_value >> 3;
8390
8391 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8392 {
8393 (*_bfd_error_handler)
8394 (_("%s defined on removed toc entry"),
8395 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8396 do
8397 ++i;
8398 while ((skip[i] & (ref_from_discarded | can_optimize)));
8399 sym->st_value = (bfd_vma) i << 3;
8400 }
8401
8402 sym->st_value -= skip[i];
8403 symtab_hdr->contents = (unsigned char *) local_syms;
8404 }
8405 }
8406
8407 /* Adjust any global syms defined in this toc input section. */
8408 if (toc_inf.global_toc_syms)
8409 {
8410 toc_inf.toc = toc;
8411 toc_inf.skip = skip;
8412 toc_inf.global_toc_syms = FALSE;
8413 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8414 &toc_inf);
8415 }
8416
8417 if (toc->reloc_count != 0)
8418 {
8419 Elf_Internal_Rela *wrel;
8420 bfd_size_type sz;
8421
8422 /* Read toc relocs. */
8423 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8424 TRUE);
8425 if (relstart == NULL)
8426 goto error_ret;
8427
8428 /* Remove unused toc relocs, and adjust those we keep. */
8429 wrel = relstart;
8430 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8431 if ((skip[rel->r_offset >> 3]
8432 & (ref_from_discarded | can_optimize)) == 0)
8433 {
8434 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8435 wrel->r_info = rel->r_info;
8436 wrel->r_addend = rel->r_addend;
8437 ++wrel;
8438 }
8439 else if (!dec_dynrel_count (rel->r_info, toc, info,
8440 &local_syms, NULL, NULL))
8441 goto error_ret;
8442
8443 toc->reloc_count = wrel - relstart;
8444 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8445 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8446 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8447 }
8448 }
8449
8450 if (local_syms != NULL
8451 && symtab_hdr->contents != (unsigned char *) local_syms)
8452 {
8453 if (!info->keep_memory)
8454 free (local_syms);
8455 else
8456 symtab_hdr->contents = (unsigned char *) local_syms;
8457 }
8458 free (skip);
8459 }
8460
8461 return TRUE;
8462 }
8463
8464 /* Return true iff input section I references the TOC using
8465 instructions limited to +/-32k offsets. */
8466
8467 bfd_boolean
8468 ppc64_elf_has_small_toc_reloc (asection *i)
8469 {
8470 return (is_ppc64_elf (i->owner)
8471 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8472 }
8473
8474 /* Allocate space for one GOT entry. */
8475
8476 static void
8477 allocate_got (struct elf_link_hash_entry *h,
8478 struct bfd_link_info *info,
8479 struct got_entry *gent)
8480 {
8481 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8482 bfd_boolean dyn;
8483 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8484 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8485 ? 16 : 8);
8486 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8487 ? 2 : 1) * sizeof (Elf64_External_Rela);
8488 asection *got = ppc64_elf_tdata (gent->owner)->got;
8489
8490 gent->got.offset = got->size;
8491 got->size += entsize;
8492
8493 dyn = htab->elf.dynamic_sections_created;
8494 if ((info->shared
8495 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8496 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8497 || h->root.type != bfd_link_hash_undefweak))
8498 {
8499 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8500 relgot->size += rentsize;
8501 }
8502 else if (h->type == STT_GNU_IFUNC)
8503 {
8504 asection *relgot = htab->reliplt;
8505 relgot->size += rentsize;
8506 htab->got_reli_size += rentsize;
8507 }
8508 }
8509
8510 /* This function merges got entries in the same toc group. */
8511
8512 static void
8513 merge_got_entries (struct got_entry **pent)
8514 {
8515 struct got_entry *ent, *ent2;
8516
8517 for (ent = *pent; ent != NULL; ent = ent->next)
8518 if (!ent->is_indirect)
8519 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8520 if (!ent2->is_indirect
8521 && ent2->addend == ent->addend
8522 && ent2->tls_type == ent->tls_type
8523 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8524 {
8525 ent2->is_indirect = TRUE;
8526 ent2->got.ent = ent;
8527 }
8528 }
8529
8530 /* Allocate space in .plt, .got and associated reloc sections for
8531 dynamic relocs. */
8532
8533 static bfd_boolean
8534 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8535 {
8536 struct bfd_link_info *info;
8537 struct ppc_link_hash_table *htab;
8538 asection *s;
8539 struct ppc_link_hash_entry *eh;
8540 struct ppc_dyn_relocs *p;
8541 struct got_entry **pgent, *gent;
8542
8543 if (h->root.type == bfd_link_hash_indirect)
8544 return TRUE;
8545
8546 if (h->root.type == bfd_link_hash_warning)
8547 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8548
8549 info = (struct bfd_link_info *) inf;
8550 htab = ppc_hash_table (info);
8551 if (htab == NULL)
8552 return FALSE;
8553
8554 if ((htab->elf.dynamic_sections_created
8555 && h->dynindx != -1
8556 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8557 || h->type == STT_GNU_IFUNC)
8558 {
8559 struct plt_entry *pent;
8560 bfd_boolean doneone = FALSE;
8561 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8562 if (pent->plt.refcount > 0)
8563 {
8564 if (!htab->elf.dynamic_sections_created
8565 || h->dynindx == -1)
8566 {
8567 s = htab->iplt;
8568 pent->plt.offset = s->size;
8569 s->size += PLT_ENTRY_SIZE;
8570 s = htab->reliplt;
8571 }
8572 else
8573 {
8574 /* If this is the first .plt entry, make room for the special
8575 first entry. */
8576 s = htab->plt;
8577 if (s->size == 0)
8578 s->size += PLT_INITIAL_ENTRY_SIZE;
8579
8580 pent->plt.offset = s->size;
8581
8582 /* Make room for this entry. */
8583 s->size += PLT_ENTRY_SIZE;
8584
8585 /* Make room for the .glink code. */
8586 s = htab->glink;
8587 if (s->size == 0)
8588 s->size += GLINK_CALL_STUB_SIZE;
8589 /* We need bigger stubs past index 32767. */
8590 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8591 s->size += 4;
8592 s->size += 2*4;
8593
8594 /* We also need to make an entry in the .rela.plt section. */
8595 s = htab->relplt;
8596 }
8597 s->size += sizeof (Elf64_External_Rela);
8598 doneone = TRUE;
8599 }
8600 else
8601 pent->plt.offset = (bfd_vma) -1;
8602 if (!doneone)
8603 {
8604 h->plt.plist = NULL;
8605 h->needs_plt = 0;
8606 }
8607 }
8608 else
8609 {
8610 h->plt.plist = NULL;
8611 h->needs_plt = 0;
8612 }
8613
8614 eh = (struct ppc_link_hash_entry *) h;
8615 /* Run through the TLS GD got entries first if we're changing them
8616 to TPREL. */
8617 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8618 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8619 if (gent->got.refcount > 0
8620 && (gent->tls_type & TLS_GD) != 0)
8621 {
8622 /* This was a GD entry that has been converted to TPREL. If
8623 there happens to be a TPREL entry we can use that one. */
8624 struct got_entry *ent;
8625 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8626 if (ent->got.refcount > 0
8627 && (ent->tls_type & TLS_TPREL) != 0
8628 && ent->addend == gent->addend
8629 && ent->owner == gent->owner)
8630 {
8631 gent->got.refcount = 0;
8632 break;
8633 }
8634
8635 /* If not, then we'll be using our own TPREL entry. */
8636 if (gent->got.refcount != 0)
8637 gent->tls_type = TLS_TLS | TLS_TPREL;
8638 }
8639
8640 /* Remove any list entry that won't generate a word in the GOT before
8641 we call merge_got_entries. Otherwise we risk merging to empty
8642 entries. */
8643 pgent = &h->got.glist;
8644 while ((gent = *pgent) != NULL)
8645 if (gent->got.refcount > 0)
8646 {
8647 if ((gent->tls_type & TLS_LD) != 0
8648 && !h->def_dynamic)
8649 {
8650 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8651 *pgent = gent->next;
8652 }
8653 else
8654 pgent = &gent->next;
8655 }
8656 else
8657 *pgent = gent->next;
8658
8659 if (!htab->do_multi_toc)
8660 merge_got_entries (&h->got.glist);
8661
8662 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8663 if (!gent->is_indirect)
8664 {
8665 /* Make sure this symbol is output as a dynamic symbol.
8666 Undefined weak syms won't yet be marked as dynamic,
8667 nor will all TLS symbols. */
8668 if (h->dynindx == -1
8669 && !h->forced_local
8670 && h->type != STT_GNU_IFUNC
8671 && htab->elf.dynamic_sections_created)
8672 {
8673 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8674 return FALSE;
8675 }
8676
8677 if (!is_ppc64_elf (gent->owner))
8678 abort ();
8679
8680 allocate_got (h, info, gent);
8681 }
8682
8683 if (eh->dyn_relocs == NULL
8684 || (!htab->elf.dynamic_sections_created
8685 && h->type != STT_GNU_IFUNC))
8686 return TRUE;
8687
8688 /* In the shared -Bsymbolic case, discard space allocated for
8689 dynamic pc-relative relocs against symbols which turn out to be
8690 defined in regular objects. For the normal shared case, discard
8691 space for relocs that have become local due to symbol visibility
8692 changes. */
8693
8694 if (info->shared)
8695 {
8696 /* Relocs that use pc_count are those that appear on a call insn,
8697 or certain REL relocs (see must_be_dyn_reloc) that can be
8698 generated via assembly. We want calls to protected symbols to
8699 resolve directly to the function rather than going via the plt.
8700 If people want function pointer comparisons to work as expected
8701 then they should avoid writing weird assembly. */
8702 if (SYMBOL_CALLS_LOCAL (info, h))
8703 {
8704 struct ppc_dyn_relocs **pp;
8705
8706 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8707 {
8708 p->count -= p->pc_count;
8709 p->pc_count = 0;
8710 if (p->count == 0)
8711 *pp = p->next;
8712 else
8713 pp = &p->next;
8714 }
8715 }
8716
8717 /* Also discard relocs on undefined weak syms with non-default
8718 visibility. */
8719 if (eh->dyn_relocs != NULL
8720 && h->root.type == bfd_link_hash_undefweak)
8721 {
8722 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8723 eh->dyn_relocs = NULL;
8724
8725 /* Make sure this symbol is output as a dynamic symbol.
8726 Undefined weak syms won't yet be marked as dynamic. */
8727 else if (h->dynindx == -1
8728 && !h->forced_local)
8729 {
8730 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8731 return FALSE;
8732 }
8733 }
8734 }
8735 else if (h->type == STT_GNU_IFUNC)
8736 {
8737 if (!h->non_got_ref)
8738 eh->dyn_relocs = NULL;
8739 }
8740 else if (ELIMINATE_COPY_RELOCS)
8741 {
8742 /* For the non-shared case, discard space for relocs against
8743 symbols which turn out to need copy relocs or are not
8744 dynamic. */
8745
8746 if (!h->non_got_ref
8747 && !h->def_regular)
8748 {
8749 /* Make sure this symbol is output as a dynamic symbol.
8750 Undefined weak syms won't yet be marked as dynamic. */
8751 if (h->dynindx == -1
8752 && !h->forced_local)
8753 {
8754 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8755 return FALSE;
8756 }
8757
8758 /* If that succeeded, we know we'll be keeping all the
8759 relocs. */
8760 if (h->dynindx != -1)
8761 goto keep;
8762 }
8763
8764 eh->dyn_relocs = NULL;
8765
8766 keep: ;
8767 }
8768
8769 /* Finally, allocate space. */
8770 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8771 {
8772 asection *sreloc = elf_section_data (p->sec)->sreloc;
8773 if (!htab->elf.dynamic_sections_created)
8774 sreloc = htab->reliplt;
8775 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8776 }
8777
8778 return TRUE;
8779 }
8780
8781 /* Find any dynamic relocs that apply to read-only sections. */
8782
8783 static bfd_boolean
8784 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8785 {
8786 struct ppc_link_hash_entry *eh;
8787 struct ppc_dyn_relocs *p;
8788
8789 if (h->root.type == bfd_link_hash_warning)
8790 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8791
8792 eh = (struct ppc_link_hash_entry *) h;
8793 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8794 {
8795 asection *s = p->sec->output_section;
8796
8797 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8798 {
8799 struct bfd_link_info *info = inf;
8800
8801 info->flags |= DF_TEXTREL;
8802
8803 /* Not an error, just cut short the traversal. */
8804 return FALSE;
8805 }
8806 }
8807 return TRUE;
8808 }
8809
8810 /* Set the sizes of the dynamic sections. */
8811
8812 static bfd_boolean
8813 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8814 struct bfd_link_info *info)
8815 {
8816 struct ppc_link_hash_table *htab;
8817 bfd *dynobj;
8818 asection *s;
8819 bfd_boolean relocs;
8820 bfd *ibfd;
8821 struct got_entry *first_tlsld;
8822
8823 htab = ppc_hash_table (info);
8824 if (htab == NULL)
8825 return FALSE;
8826
8827 dynobj = htab->elf.dynobj;
8828 if (dynobj == NULL)
8829 abort ();
8830
8831 if (htab->elf.dynamic_sections_created)
8832 {
8833 /* Set the contents of the .interp section to the interpreter. */
8834 if (info->executable)
8835 {
8836 s = bfd_get_section_by_name (dynobj, ".interp");
8837 if (s == NULL)
8838 abort ();
8839 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8840 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8841 }
8842 }
8843
8844 /* Set up .got offsets for local syms, and space for local dynamic
8845 relocs. */
8846 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8847 {
8848 struct got_entry **lgot_ents;
8849 struct got_entry **end_lgot_ents;
8850 struct plt_entry **local_plt;
8851 struct plt_entry **end_local_plt;
8852 unsigned char *lgot_masks;
8853 bfd_size_type locsymcount;
8854 Elf_Internal_Shdr *symtab_hdr;
8855 asection *srel;
8856
8857 if (!is_ppc64_elf (ibfd))
8858 continue;
8859
8860 for (s = ibfd->sections; s != NULL; s = s->next)
8861 {
8862 struct ppc_dyn_relocs *p;
8863
8864 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8865 {
8866 if (!bfd_is_abs_section (p->sec)
8867 && bfd_is_abs_section (p->sec->output_section))
8868 {
8869 /* Input section has been discarded, either because
8870 it is a copy of a linkonce section or due to
8871 linker script /DISCARD/, so we'll be discarding
8872 the relocs too. */
8873 }
8874 else if (p->count != 0)
8875 {
8876 srel = elf_section_data (p->sec)->sreloc;
8877 if (!htab->elf.dynamic_sections_created)
8878 srel = htab->reliplt;
8879 srel->size += p->count * sizeof (Elf64_External_Rela);
8880 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8881 info->flags |= DF_TEXTREL;
8882 }
8883 }
8884 }
8885
8886 lgot_ents = elf_local_got_ents (ibfd);
8887 if (!lgot_ents)
8888 continue;
8889
8890 symtab_hdr = &elf_symtab_hdr (ibfd);
8891 locsymcount = symtab_hdr->sh_info;
8892 end_lgot_ents = lgot_ents + locsymcount;
8893 local_plt = (struct plt_entry **) end_lgot_ents;
8894 end_local_plt = local_plt + locsymcount;
8895 lgot_masks = (unsigned char *) end_local_plt;
8896 s = ppc64_elf_tdata (ibfd)->got;
8897 srel = ppc64_elf_tdata (ibfd)->relgot;
8898 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8899 {
8900 struct got_entry **pent, *ent;
8901
8902 pent = lgot_ents;
8903 while ((ent = *pent) != NULL)
8904 if (ent->got.refcount > 0)
8905 {
8906 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8907 {
8908 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8909 *pent = ent->next;
8910 }
8911 else
8912 {
8913 unsigned int num = 1;
8914 ent->got.offset = s->size;
8915 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8916 num = 2;
8917 s->size += num * 8;
8918 if (info->shared)
8919 srel->size += num * sizeof (Elf64_External_Rela);
8920 else if ((*lgot_masks & PLT_IFUNC) != 0)
8921 {
8922 htab->reliplt->size
8923 += num * sizeof (Elf64_External_Rela);
8924 htab->got_reli_size
8925 += num * sizeof (Elf64_External_Rela);
8926 }
8927 pent = &ent->next;
8928 }
8929 }
8930 else
8931 *pent = ent->next;
8932 }
8933
8934 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8935 for (; local_plt < end_local_plt; ++local_plt)
8936 {
8937 struct plt_entry *ent;
8938
8939 for (ent = *local_plt; ent != NULL; ent = ent->next)
8940 if (ent->plt.refcount > 0)
8941 {
8942 s = htab->iplt;
8943 ent->plt.offset = s->size;
8944 s->size += PLT_ENTRY_SIZE;
8945
8946 htab->reliplt->size += sizeof (Elf64_External_Rela);
8947 }
8948 else
8949 ent->plt.offset = (bfd_vma) -1;
8950 }
8951 }
8952
8953 /* Allocate global sym .plt and .got entries, and space for global
8954 sym dynamic relocs. */
8955 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8956
8957 first_tlsld = NULL;
8958 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8959 {
8960 struct got_entry *ent;
8961
8962 if (!is_ppc64_elf (ibfd))
8963 continue;
8964
8965 ent = ppc64_tlsld_got (ibfd);
8966 if (ent->got.refcount > 0)
8967 {
8968 if (!htab->do_multi_toc && first_tlsld != NULL)
8969 {
8970 ent->is_indirect = TRUE;
8971 ent->got.ent = first_tlsld;
8972 }
8973 else
8974 {
8975 if (first_tlsld == NULL)
8976 first_tlsld = ent;
8977 s = ppc64_elf_tdata (ibfd)->got;
8978 ent->got.offset = s->size;
8979 ent->owner = ibfd;
8980 s->size += 16;
8981 if (info->shared)
8982 {
8983 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8984 srel->size += sizeof (Elf64_External_Rela);
8985 }
8986 }
8987 }
8988 else
8989 ent->got.offset = (bfd_vma) -1;
8990 }
8991
8992 /* We now have determined the sizes of the various dynamic sections.
8993 Allocate memory for them. */
8994 relocs = FALSE;
8995 for (s = dynobj->sections; s != NULL; s = s->next)
8996 {
8997 if ((s->flags & SEC_LINKER_CREATED) == 0)
8998 continue;
8999
9000 if (s == htab->brlt || s == htab->relbrlt)
9001 /* These haven't been allocated yet; don't strip. */
9002 continue;
9003 else if (s == htab->got
9004 || s == htab->plt
9005 || s == htab->iplt
9006 || s == htab->glink
9007 || s == htab->dynbss)
9008 {
9009 /* Strip this section if we don't need it; see the
9010 comment below. */
9011 }
9012 else if (CONST_STRNEQ (s->name, ".rela"))
9013 {
9014 if (s->size != 0)
9015 {
9016 if (s != htab->relplt)
9017 relocs = TRUE;
9018
9019 /* We use the reloc_count field as a counter if we need
9020 to copy relocs into the output file. */
9021 s->reloc_count = 0;
9022 }
9023 }
9024 else
9025 {
9026 /* It's not one of our sections, so don't allocate space. */
9027 continue;
9028 }
9029
9030 if (s->size == 0)
9031 {
9032 /* If we don't need this section, strip it from the
9033 output file. This is mostly to handle .rela.bss and
9034 .rela.plt. We must create both sections in
9035 create_dynamic_sections, because they must be created
9036 before the linker maps input sections to output
9037 sections. The linker does that before
9038 adjust_dynamic_symbol is called, and it is that
9039 function which decides whether anything needs to go
9040 into these sections. */
9041 s->flags |= SEC_EXCLUDE;
9042 continue;
9043 }
9044
9045 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9046 continue;
9047
9048 /* Allocate memory for the section contents. We use bfd_zalloc
9049 here in case unused entries are not reclaimed before the
9050 section's contents are written out. This should not happen,
9051 but this way if it does we get a R_PPC64_NONE reloc in .rela
9052 sections instead of garbage.
9053 We also rely on the section contents being zero when writing
9054 the GOT. */
9055 s->contents = bfd_zalloc (dynobj, s->size);
9056 if (s->contents == NULL)
9057 return FALSE;
9058 }
9059
9060 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9061 {
9062 if (!is_ppc64_elf (ibfd))
9063 continue;
9064
9065 s = ppc64_elf_tdata (ibfd)->got;
9066 if (s != NULL && s != htab->got)
9067 {
9068 if (s->size == 0)
9069 s->flags |= SEC_EXCLUDE;
9070 else
9071 {
9072 s->contents = bfd_zalloc (ibfd, s->size);
9073 if (s->contents == NULL)
9074 return FALSE;
9075 }
9076 }
9077 s = ppc64_elf_tdata (ibfd)->relgot;
9078 if (s != NULL)
9079 {
9080 if (s->size == 0)
9081 s->flags |= SEC_EXCLUDE;
9082 else
9083 {
9084 s->contents = bfd_zalloc (ibfd, s->size);
9085 if (s->contents == NULL)
9086 return FALSE;
9087 relocs = TRUE;
9088 s->reloc_count = 0;
9089 }
9090 }
9091 }
9092
9093 if (htab->elf.dynamic_sections_created)
9094 {
9095 /* Add some entries to the .dynamic section. We fill in the
9096 values later, in ppc64_elf_finish_dynamic_sections, but we
9097 must add the entries now so that we get the correct size for
9098 the .dynamic section. The DT_DEBUG entry is filled in by the
9099 dynamic linker and used by the debugger. */
9100 #define add_dynamic_entry(TAG, VAL) \
9101 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9102
9103 if (info->executable)
9104 {
9105 if (!add_dynamic_entry (DT_DEBUG, 0))
9106 return FALSE;
9107 }
9108
9109 if (htab->plt != NULL && htab->plt->size != 0)
9110 {
9111 if (!add_dynamic_entry (DT_PLTGOT, 0)
9112 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9113 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9114 || !add_dynamic_entry (DT_JMPREL, 0)
9115 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9116 return FALSE;
9117 }
9118
9119 if (NO_OPD_RELOCS)
9120 {
9121 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9122 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9123 return FALSE;
9124 }
9125
9126 if (!htab->no_tls_get_addr_opt
9127 && htab->tls_get_addr_fd != NULL
9128 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9129 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9130 return FALSE;
9131
9132 if (relocs)
9133 {
9134 if (!add_dynamic_entry (DT_RELA, 0)
9135 || !add_dynamic_entry (DT_RELASZ, 0)
9136 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9137 return FALSE;
9138
9139 /* If any dynamic relocs apply to a read-only section,
9140 then we need a DT_TEXTREL entry. */
9141 if ((info->flags & DF_TEXTREL) == 0)
9142 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9143
9144 if ((info->flags & DF_TEXTREL) != 0)
9145 {
9146 if (!add_dynamic_entry (DT_TEXTREL, 0))
9147 return FALSE;
9148 }
9149 }
9150 }
9151 #undef add_dynamic_entry
9152
9153 return TRUE;
9154 }
9155
9156 /* Determine the type of stub needed, if any, for a call. */
9157
9158 static inline enum ppc_stub_type
9159 ppc_type_of_stub (asection *input_sec,
9160 const Elf_Internal_Rela *rel,
9161 struct ppc_link_hash_entry **hash,
9162 struct plt_entry **plt_ent,
9163 bfd_vma destination)
9164 {
9165 struct ppc_link_hash_entry *h = *hash;
9166 bfd_vma location;
9167 bfd_vma branch_offset;
9168 bfd_vma max_branch_offset;
9169 enum elf_ppc64_reloc_type r_type;
9170
9171 if (h != NULL)
9172 {
9173 struct plt_entry *ent;
9174 struct ppc_link_hash_entry *fdh = h;
9175 if (h->oh != NULL
9176 && h->oh->is_func_descriptor)
9177 {
9178 fdh = ppc_follow_link (h->oh);
9179 *hash = fdh;
9180 }
9181
9182 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9183 if (ent->addend == rel->r_addend
9184 && ent->plt.offset != (bfd_vma) -1)
9185 {
9186 *plt_ent = ent;
9187 return ppc_stub_plt_call;
9188 }
9189
9190 /* Here, we know we don't have a plt entry. If we don't have a
9191 either a defined function descriptor or a defined entry symbol
9192 in a regular object file, then it is pointless trying to make
9193 any other type of stub. */
9194 if (!is_static_defined (&fdh->elf)
9195 && !is_static_defined (&h->elf))
9196 return ppc_stub_none;
9197 }
9198 else if (elf_local_got_ents (input_sec->owner) != NULL)
9199 {
9200 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9201 struct plt_entry **local_plt = (struct plt_entry **)
9202 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9203 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9204
9205 if (local_plt[r_symndx] != NULL)
9206 {
9207 struct plt_entry *ent;
9208
9209 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9210 if (ent->addend == rel->r_addend
9211 && ent->plt.offset != (bfd_vma) -1)
9212 {
9213 *plt_ent = ent;
9214 return ppc_stub_plt_call;
9215 }
9216 }
9217 }
9218
9219 /* Determine where the call point is. */
9220 location = (input_sec->output_offset
9221 + input_sec->output_section->vma
9222 + rel->r_offset);
9223
9224 branch_offset = destination - location;
9225 r_type = ELF64_R_TYPE (rel->r_info);
9226
9227 /* Determine if a long branch stub is needed. */
9228 max_branch_offset = 1 << 25;
9229 if (r_type != R_PPC64_REL24)
9230 max_branch_offset = 1 << 15;
9231
9232 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9233 /* We need a stub. Figure out whether a long_branch or plt_branch
9234 is needed later. */
9235 return ppc_stub_long_branch;
9236
9237 return ppc_stub_none;
9238 }
9239
9240 /* Build a .plt call stub. */
9241
9242 static inline bfd_byte *
9243 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9244 {
9245 #define PPC_LO(v) ((v) & 0xffff)
9246 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9247 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9248
9249 if (PPC_HA (offset) != 0)
9250 {
9251 if (r != NULL)
9252 {
9253 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9254 r[1].r_offset = r[0].r_offset + 8;
9255 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9256 r[1].r_addend = r[0].r_addend;
9257 if (PPC_HA (offset + 16) != PPC_HA (offset))
9258 {
9259 r[2].r_offset = r[1].r_offset + 4;
9260 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9261 r[2].r_addend = r[0].r_addend;
9262 }
9263 else
9264 {
9265 r[2].r_offset = r[1].r_offset + 8;
9266 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9267 r[2].r_addend = r[0].r_addend + 8;
9268 r[3].r_offset = r[2].r_offset + 4;
9269 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9270 r[3].r_addend = r[0].r_addend + 16;
9271 }
9272 }
9273 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9274 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9275 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9276 if (PPC_HA (offset + 16) != PPC_HA (offset))
9277 {
9278 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9279 offset = 0;
9280 }
9281 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9282 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9283 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9284 bfd_put_32 (obfd, BCTR, p), p += 4;
9285 }
9286 else
9287 {
9288 if (r != NULL)
9289 {
9290 r[0].r_offset += 4;
9291 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9292 if (PPC_HA (offset + 16) != PPC_HA (offset))
9293 {
9294 r[1].r_offset = r[0].r_offset + 4;
9295 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9296 r[1].r_addend = r[0].r_addend;
9297 }
9298 else
9299 {
9300 r[1].r_offset = r[0].r_offset + 8;
9301 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9302 r[1].r_addend = r[0].r_addend + 16;
9303 r[2].r_offset = r[1].r_offset + 4;
9304 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9305 r[2].r_addend = r[0].r_addend + 8;
9306 }
9307 }
9308 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9309 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9310 if (PPC_HA (offset + 16) != PPC_HA (offset))
9311 {
9312 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9313 offset = 0;
9314 }
9315 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9316 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9317 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9318 bfd_put_32 (obfd, BCTR, p), p += 4;
9319 }
9320 return p;
9321 }
9322
9323 /* Build a special .plt call stub for __tls_get_addr. */
9324
9325 #define LD_R11_0R3 0xe9630000
9326 #define LD_R12_0R3 0xe9830000
9327 #define MR_R0_R3 0x7c601b78
9328 #define CMPDI_R11_0 0x2c2b0000
9329 #define ADD_R3_R12_R13 0x7c6c6a14
9330 #define BEQLR 0x4d820020
9331 #define MR_R3_R0 0x7c030378
9332 #define MFLR_R11 0x7d6802a6
9333 #define STD_R11_0R1 0xf9610000
9334 #define BCTRL 0x4e800421
9335 #define LD_R11_0R1 0xe9610000
9336 #define LD_R2_0R1 0xe8410000
9337 #define MTLR_R11 0x7d6803a6
9338
9339 static inline bfd_byte *
9340 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9341 Elf_Internal_Rela *r)
9342 {
9343 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9344 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9345 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9346 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9347 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9348 bfd_put_32 (obfd, BEQLR, p), p += 4;
9349 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9350 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9351 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9352
9353 if (r != NULL)
9354 r[0].r_offset += 9 * 4;
9355 p = build_plt_stub (obfd, p, offset, r);
9356 bfd_put_32 (obfd, BCTRL, p - 4);
9357
9358 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9359 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9360 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9361 bfd_put_32 (obfd, BLR, p), p += 4;
9362
9363 return p;
9364 }
9365
9366 static Elf_Internal_Rela *
9367 get_relocs (asection *sec, int count)
9368 {
9369 Elf_Internal_Rela *relocs;
9370 struct bfd_elf_section_data *elfsec_data;
9371
9372 elfsec_data = elf_section_data (sec);
9373 relocs = elfsec_data->relocs;
9374 if (relocs == NULL)
9375 {
9376 bfd_size_type relsize;
9377 relsize = sec->reloc_count * sizeof (*relocs);
9378 relocs = bfd_alloc (sec->owner, relsize);
9379 if (relocs == NULL)
9380 return NULL;
9381 elfsec_data->relocs = relocs;
9382 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9383 * sizeof (Elf64_External_Rela));
9384 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9385 sec->reloc_count = 0;
9386 }
9387 relocs += sec->reloc_count;
9388 sec->reloc_count += count;
9389 return relocs;
9390 }
9391
9392 static bfd_boolean
9393 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9394 {
9395 struct ppc_stub_hash_entry *stub_entry;
9396 struct ppc_branch_hash_entry *br_entry;
9397 struct bfd_link_info *info;
9398 struct ppc_link_hash_table *htab;
9399 bfd_byte *loc;
9400 bfd_byte *p;
9401 bfd_vma dest, off;
9402 int size;
9403 Elf_Internal_Rela *r;
9404 asection *plt;
9405
9406 /* Massage our args to the form they really have. */
9407 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9408 info = in_arg;
9409
9410 htab = ppc_hash_table (info);
9411 if (htab == NULL)
9412 return FALSE;
9413
9414 /* Make a note of the offset within the stubs for this entry. */
9415 stub_entry->stub_offset = stub_entry->stub_sec->size;
9416 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9417
9418 htab->stub_count[stub_entry->stub_type - 1] += 1;
9419 switch (stub_entry->stub_type)
9420 {
9421 case ppc_stub_long_branch:
9422 case ppc_stub_long_branch_r2off:
9423 /* Branches are relative. This is where we are going to. */
9424 off = dest = (stub_entry->target_value
9425 + stub_entry->target_section->output_offset
9426 + stub_entry->target_section->output_section->vma);
9427
9428 /* And this is where we are coming from. */
9429 off -= (stub_entry->stub_offset
9430 + stub_entry->stub_sec->output_offset
9431 + stub_entry->stub_sec->output_section->vma);
9432
9433 size = 4;
9434 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9435 {
9436 bfd_vma r2off;
9437
9438 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9439 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9440 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9441 loc += 4;
9442 size = 12;
9443 if (PPC_HA (r2off) != 0)
9444 {
9445 size = 16;
9446 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9447 loc += 4;
9448 }
9449 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9450 loc += 4;
9451 off -= size - 4;
9452 }
9453 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9454
9455 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9456 {
9457 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9458 stub_entry->root.string);
9459 htab->stub_error = TRUE;
9460 return FALSE;
9461 }
9462
9463 if (info->emitrelocations)
9464 {
9465 r = get_relocs (stub_entry->stub_sec, 1);
9466 if (r == NULL)
9467 return FALSE;
9468 r->r_offset = loc - stub_entry->stub_sec->contents;
9469 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9470 r->r_addend = dest;
9471 if (stub_entry->h != NULL)
9472 {
9473 struct elf_link_hash_entry **hashes;
9474 unsigned long symndx;
9475 struct ppc_link_hash_entry *h;
9476
9477 hashes = elf_sym_hashes (htab->stub_bfd);
9478 if (hashes == NULL)
9479 {
9480 bfd_size_type hsize;
9481
9482 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9483 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9484 if (hashes == NULL)
9485 return FALSE;
9486 elf_sym_hashes (htab->stub_bfd) = hashes;
9487 htab->stub_globals = 1;
9488 }
9489 symndx = htab->stub_globals++;
9490 h = stub_entry->h;
9491 hashes[symndx] = &h->elf;
9492 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9493 if (h->oh != NULL && h->oh->is_func)
9494 h = ppc_follow_link (h->oh);
9495 if (h->elf.root.u.def.section != stub_entry->target_section)
9496 /* H is an opd symbol. The addend must be zero. */
9497 r->r_addend = 0;
9498 else
9499 {
9500 off = (h->elf.root.u.def.value
9501 + h->elf.root.u.def.section->output_offset
9502 + h->elf.root.u.def.section->output_section->vma);
9503 r->r_addend -= off;
9504 }
9505 }
9506 }
9507 break;
9508
9509 case ppc_stub_plt_branch:
9510 case ppc_stub_plt_branch_r2off:
9511 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9512 stub_entry->root.string + 9,
9513 FALSE, FALSE);
9514 if (br_entry == NULL)
9515 {
9516 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9517 stub_entry->root.string);
9518 htab->stub_error = TRUE;
9519 return FALSE;
9520 }
9521
9522 dest = (stub_entry->target_value
9523 + stub_entry->target_section->output_offset
9524 + stub_entry->target_section->output_section->vma);
9525
9526 bfd_put_64 (htab->brlt->owner, dest,
9527 htab->brlt->contents + br_entry->offset);
9528
9529 if (br_entry->iter == htab->stub_iteration)
9530 {
9531 br_entry->iter = 0;
9532
9533 if (htab->relbrlt != NULL)
9534 {
9535 /* Create a reloc for the branch lookup table entry. */
9536 Elf_Internal_Rela rela;
9537 bfd_byte *rl;
9538
9539 rela.r_offset = (br_entry->offset
9540 + htab->brlt->output_offset
9541 + htab->brlt->output_section->vma);
9542 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9543 rela.r_addend = dest;
9544
9545 rl = htab->relbrlt->contents;
9546 rl += (htab->relbrlt->reloc_count++
9547 * sizeof (Elf64_External_Rela));
9548 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9549 }
9550 else if (info->emitrelocations)
9551 {
9552 r = get_relocs (htab->brlt, 1);
9553 if (r == NULL)
9554 return FALSE;
9555 /* brlt, being SEC_LINKER_CREATED does not go through the
9556 normal reloc processing. Symbols and offsets are not
9557 translated from input file to output file form, so
9558 set up the offset per the output file. */
9559 r->r_offset = (br_entry->offset
9560 + htab->brlt->output_offset
9561 + htab->brlt->output_section->vma);
9562 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9563 r->r_addend = dest;
9564 }
9565 }
9566
9567 dest = (br_entry->offset
9568 + htab->brlt->output_offset
9569 + htab->brlt->output_section->vma);
9570
9571 off = (dest
9572 - elf_gp (htab->brlt->output_section->owner)
9573 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9574
9575 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9576 {
9577 (*_bfd_error_handler)
9578 (_("linkage table error against `%s'"),
9579 stub_entry->root.string);
9580 bfd_set_error (bfd_error_bad_value);
9581 htab->stub_error = TRUE;
9582 return FALSE;
9583 }
9584
9585 if (info->emitrelocations)
9586 {
9587 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9588 if (r == NULL)
9589 return FALSE;
9590 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9591 if (bfd_big_endian (info->output_bfd))
9592 r[0].r_offset += 2;
9593 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9594 r[0].r_offset += 4;
9595 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9596 r[0].r_addend = dest;
9597 if (PPC_HA (off) != 0)
9598 {
9599 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9600 r[1].r_offset = r[0].r_offset + 4;
9601 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9602 r[1].r_addend = r[0].r_addend;
9603 }
9604 }
9605
9606 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9607 {
9608 if (PPC_HA (off) != 0)
9609 {
9610 size = 16;
9611 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9612 loc += 4;
9613 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9614 }
9615 else
9616 {
9617 size = 12;
9618 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9619 }
9620 }
9621 else
9622 {
9623 bfd_vma r2off;
9624
9625 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9626 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9627 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9628 loc += 4;
9629 size = 20;
9630 if (PPC_HA (off) != 0)
9631 {
9632 size += 4;
9633 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9634 loc += 4;
9635 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9636 loc += 4;
9637 }
9638 else
9639 {
9640 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9641 loc += 4;
9642 }
9643
9644 if (PPC_HA (r2off) != 0)
9645 {
9646 size += 4;
9647 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9648 loc += 4;
9649 }
9650 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9651 }
9652 loc += 4;
9653 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9654 loc += 4;
9655 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9656 break;
9657
9658 case ppc_stub_plt_call:
9659 if (stub_entry->h != NULL
9660 && stub_entry->h->is_func_descriptor
9661 && stub_entry->h->oh != NULL)
9662 {
9663 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9664
9665 /* If the old-ABI "dot-symbol" is undefined make it weak so
9666 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9667 FIXME: We used to define the symbol on one of the call
9668 stubs instead, which is why we test symbol section id
9669 against htab->top_id in various places. Likely all
9670 these checks could now disappear. */
9671 if (fh->elf.root.type == bfd_link_hash_undefined)
9672 fh->elf.root.type = bfd_link_hash_undefweak;
9673 }
9674
9675 /* Now build the stub. */
9676 dest = stub_entry->plt_ent->plt.offset & ~1;
9677 if (dest >= (bfd_vma) -2)
9678 abort ();
9679
9680 plt = htab->plt;
9681 if (!htab->elf.dynamic_sections_created
9682 || stub_entry->h == NULL
9683 || stub_entry->h->elf.dynindx == -1)
9684 plt = htab->iplt;
9685
9686 dest += plt->output_offset + plt->output_section->vma;
9687
9688 if (stub_entry->h == NULL
9689 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9690 {
9691 Elf_Internal_Rela rela;
9692 bfd_byte *rl;
9693
9694 rela.r_offset = dest;
9695 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9696 rela.r_addend = (stub_entry->target_value
9697 + stub_entry->target_section->output_offset
9698 + stub_entry->target_section->output_section->vma);
9699
9700 rl = (htab->reliplt->contents
9701 + (htab->reliplt->reloc_count++
9702 * sizeof (Elf64_External_Rela)));
9703 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9704 stub_entry->plt_ent->plt.offset |= 1;
9705 }
9706
9707 off = (dest
9708 - elf_gp (plt->output_section->owner)
9709 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9710
9711 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9712 {
9713 (*_bfd_error_handler)
9714 (_("linkage table error against `%s'"),
9715 stub_entry->h != NULL
9716 ? stub_entry->h->elf.root.root.string
9717 : "<local sym>");
9718 bfd_set_error (bfd_error_bad_value);
9719 htab->stub_error = TRUE;
9720 return FALSE;
9721 }
9722
9723 r = NULL;
9724 if (info->emitrelocations)
9725 {
9726 r = get_relocs (stub_entry->stub_sec,
9727 (2 + (PPC_HA (off) != 0)
9728 + (PPC_HA (off + 16) == PPC_HA (off))));
9729 if (r == NULL)
9730 return FALSE;
9731 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9732 if (bfd_big_endian (info->output_bfd))
9733 r[0].r_offset += 2;
9734 r[0].r_addend = dest;
9735 }
9736 if (stub_entry->h != NULL
9737 && (stub_entry->h == htab->tls_get_addr_fd
9738 || stub_entry->h == htab->tls_get_addr)
9739 && !htab->no_tls_get_addr_opt)
9740 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9741 else
9742 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9743 size = p - loc;
9744 break;
9745
9746 default:
9747 BFD_FAIL ();
9748 return FALSE;
9749 }
9750
9751 stub_entry->stub_sec->size += size;
9752
9753 if (htab->emit_stub_syms)
9754 {
9755 struct elf_link_hash_entry *h;
9756 size_t len1, len2;
9757 char *name;
9758 const char *const stub_str[] = { "long_branch",
9759 "long_branch_r2off",
9760 "plt_branch",
9761 "plt_branch_r2off",
9762 "plt_call" };
9763
9764 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9765 len2 = strlen (stub_entry->root.string);
9766 name = bfd_malloc (len1 + len2 + 2);
9767 if (name == NULL)
9768 return FALSE;
9769 memcpy (name, stub_entry->root.string, 9);
9770 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9771 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9772 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9773 if (h == NULL)
9774 return FALSE;
9775 if (h->root.type == bfd_link_hash_new)
9776 {
9777 h->root.type = bfd_link_hash_defined;
9778 h->root.u.def.section = stub_entry->stub_sec;
9779 h->root.u.def.value = stub_entry->stub_offset;
9780 h->ref_regular = 1;
9781 h->def_regular = 1;
9782 h->ref_regular_nonweak = 1;
9783 h->forced_local = 1;
9784 h->non_elf = 0;
9785 }
9786 }
9787
9788 return TRUE;
9789 }
9790
9791 /* As above, but don't actually build the stub. Just bump offset so
9792 we know stub section sizes, and select plt_branch stubs where
9793 long_branch stubs won't do. */
9794
9795 static bfd_boolean
9796 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9797 {
9798 struct ppc_stub_hash_entry *stub_entry;
9799 struct bfd_link_info *info;
9800 struct ppc_link_hash_table *htab;
9801 bfd_vma off;
9802 int size;
9803
9804 /* Massage our args to the form they really have. */
9805 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9806 info = in_arg;
9807
9808 htab = ppc_hash_table (info);
9809 if (htab == NULL)
9810 return FALSE;
9811
9812 if (stub_entry->stub_type == ppc_stub_plt_call)
9813 {
9814 asection *plt;
9815 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9816 if (off >= (bfd_vma) -2)
9817 abort ();
9818 plt = htab->plt;
9819 if (!htab->elf.dynamic_sections_created
9820 || stub_entry->h == NULL
9821 || stub_entry->h->elf.dynindx == -1)
9822 plt = htab->iplt;
9823 off += (plt->output_offset
9824 + plt->output_section->vma
9825 - elf_gp (plt->output_section->owner)
9826 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9827
9828 size = PLT_CALL_STUB_SIZE;
9829 if (PPC_HA (off) == 0)
9830 size -= 4;
9831 if (PPC_HA (off + 16) != PPC_HA (off))
9832 size += 4;
9833 if (stub_entry->h != NULL
9834 && (stub_entry->h == htab->tls_get_addr_fd
9835 || stub_entry->h == htab->tls_get_addr)
9836 && !htab->no_tls_get_addr_opt)
9837 size += 13 * 4;
9838 if (info->emitrelocations)
9839 {
9840 stub_entry->stub_sec->reloc_count
9841 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9842 stub_entry->stub_sec->flags |= SEC_RELOC;
9843 }
9844 }
9845 else
9846 {
9847 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9848 variants. */
9849 bfd_vma r2off = 0;
9850
9851 off = (stub_entry->target_value
9852 + stub_entry->target_section->output_offset
9853 + stub_entry->target_section->output_section->vma);
9854 off -= (stub_entry->stub_sec->size
9855 + stub_entry->stub_sec->output_offset
9856 + stub_entry->stub_sec->output_section->vma);
9857
9858 /* Reset the stub type from the plt variant in case we now
9859 can reach with a shorter stub. */
9860 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9861 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9862
9863 size = 4;
9864 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9865 {
9866 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9867 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9868 size = 12;
9869 if (PPC_HA (r2off) != 0)
9870 size = 16;
9871 off -= size - 4;
9872 }
9873
9874 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9875 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9876 {
9877 struct ppc_branch_hash_entry *br_entry;
9878
9879 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9880 stub_entry->root.string + 9,
9881 TRUE, FALSE);
9882 if (br_entry == NULL)
9883 {
9884 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9885 stub_entry->root.string);
9886 htab->stub_error = TRUE;
9887 return FALSE;
9888 }
9889
9890 if (br_entry->iter != htab->stub_iteration)
9891 {
9892 br_entry->iter = htab->stub_iteration;
9893 br_entry->offset = htab->brlt->size;
9894 htab->brlt->size += 8;
9895
9896 if (htab->relbrlt != NULL)
9897 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9898 else if (info->emitrelocations)
9899 {
9900 htab->brlt->reloc_count += 1;
9901 htab->brlt->flags |= SEC_RELOC;
9902 }
9903 }
9904
9905 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9906 off = (br_entry->offset
9907 + htab->brlt->output_offset
9908 + htab->brlt->output_section->vma
9909 - elf_gp (htab->brlt->output_section->owner)
9910 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9911
9912 if (info->emitrelocations)
9913 {
9914 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9915 stub_entry->stub_sec->flags |= SEC_RELOC;
9916 }
9917
9918 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9919 {
9920 size = 12;
9921 if (PPC_HA (off) != 0)
9922 size = 16;
9923 }
9924 else
9925 {
9926 size = 20;
9927 if (PPC_HA (off) != 0)
9928 size += 4;
9929
9930 if (PPC_HA (r2off) != 0)
9931 size += 4;
9932 }
9933 }
9934 else if (info->emitrelocations)
9935 {
9936 stub_entry->stub_sec->reloc_count += 1;
9937 stub_entry->stub_sec->flags |= SEC_RELOC;
9938 }
9939 }
9940
9941 stub_entry->stub_sec->size += size;
9942 return TRUE;
9943 }
9944
9945 /* Set up various things so that we can make a list of input sections
9946 for each output section included in the link. Returns -1 on error,
9947 0 when no stubs will be needed, and 1 on success. */
9948
9949 int
9950 ppc64_elf_setup_section_lists
9951 (struct bfd_link_info *info,
9952 asection *(*add_stub_section) (const char *, asection *),
9953 void (*layout_sections_again) (void))
9954 {
9955 bfd *input_bfd;
9956 int top_id, top_index, id;
9957 asection *section;
9958 asection **input_list;
9959 bfd_size_type amt;
9960 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9961
9962 if (htab == NULL)
9963 return -1;
9964 /* Stash our params away. */
9965 htab->add_stub_section = add_stub_section;
9966 htab->layout_sections_again = layout_sections_again;
9967
9968 if (htab->brlt == NULL)
9969 return 0;
9970
9971 /* Find the top input section id. */
9972 for (input_bfd = info->input_bfds, top_id = 3;
9973 input_bfd != NULL;
9974 input_bfd = input_bfd->link_next)
9975 {
9976 for (section = input_bfd->sections;
9977 section != NULL;
9978 section = section->next)
9979 {
9980 if (top_id < section->id)
9981 top_id = section->id;
9982 }
9983 }
9984
9985 htab->top_id = top_id;
9986 amt = sizeof (struct map_stub) * (top_id + 1);
9987 htab->stub_group = bfd_zmalloc (amt);
9988 if (htab->stub_group == NULL)
9989 return -1;
9990
9991 /* Set toc_off for com, und, abs and ind sections. */
9992 for (id = 0; id < 3; id++)
9993 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9994
9995 /* We can't use output_bfd->section_count here to find the top output
9996 section index as some sections may have been removed, and
9997 strip_excluded_output_sections doesn't renumber the indices. */
9998 for (section = info->output_bfd->sections, top_index = 0;
9999 section != NULL;
10000 section = section->next)
10001 {
10002 if (top_index < section->index)
10003 top_index = section->index;
10004 }
10005
10006 htab->top_index = top_index;
10007 amt = sizeof (asection *) * (top_index + 1);
10008 input_list = bfd_zmalloc (amt);
10009 htab->input_list = input_list;
10010 if (input_list == NULL)
10011 return -1;
10012
10013 return 1;
10014 }
10015
10016 /* Set up for first pass at multitoc partitioning. */
10017
10018 void
10019 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10020 {
10021 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10022
10023 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10024 htab->toc_curr = elf_gp (info->output_bfd);
10025 htab->toc_bfd = NULL;
10026 htab->toc_first_sec = NULL;
10027 }
10028
10029 /* The linker repeatedly calls this function for each TOC input section
10030 and linker generated GOT section. Group input bfds such that the toc
10031 within a group is less than 64k in size. */
10032
10033 bfd_boolean
10034 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10035 {
10036 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10037 bfd_vma addr, off, limit;
10038
10039 if (htab == NULL)
10040 return FALSE;
10041
10042 if (!htab->second_toc_pass)
10043 {
10044 /* Keep track of the first .toc or .got section for this input bfd. */
10045 if (htab->toc_bfd != isec->owner)
10046 {
10047 htab->toc_bfd = isec->owner;
10048 htab->toc_first_sec = isec;
10049 }
10050
10051 addr = isec->output_offset + isec->output_section->vma;
10052 off = addr - htab->toc_curr;
10053 limit = 0x80008000;
10054 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10055 limit = 0x10000;
10056 if (off + isec->size > limit)
10057 {
10058 addr = (htab->toc_first_sec->output_offset
10059 + htab->toc_first_sec->output_section->vma);
10060 htab->toc_curr = addr;
10061 }
10062
10063 /* toc_curr is the base address of this toc group. Set elf_gp
10064 for the input section to be the offset relative to the
10065 output toc base plus 0x8000. Making the input elf_gp an
10066 offset allows us to move the toc as a whole without
10067 recalculating input elf_gp. */
10068 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10069 off += TOC_BASE_OFF;
10070
10071 /* Die if someone uses a linker script that doesn't keep input
10072 file .toc and .got together. */
10073 if (elf_gp (isec->owner) != 0
10074 && elf_gp (isec->owner) != off)
10075 return FALSE;
10076
10077 elf_gp (isec->owner) = off;
10078 return TRUE;
10079 }
10080
10081 /* During the second pass toc_first_sec points to the start of
10082 a toc group, and toc_curr is used to track the old elf_gp.
10083 We use toc_bfd to ensure we only look at each bfd once. */
10084 if (htab->toc_bfd == isec->owner)
10085 return TRUE;
10086 htab->toc_bfd = isec->owner;
10087
10088 if (htab->toc_first_sec == NULL
10089 || htab->toc_curr != elf_gp (isec->owner))
10090 {
10091 htab->toc_curr = elf_gp (isec->owner);
10092 htab->toc_first_sec = isec;
10093 }
10094 addr = (htab->toc_first_sec->output_offset
10095 + htab->toc_first_sec->output_section->vma);
10096 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10097 elf_gp (isec->owner) = off;
10098
10099 return TRUE;
10100 }
10101
10102 /* Called via elf_link_hash_traverse to merge GOT entries for global
10103 symbol H. */
10104
10105 static bfd_boolean
10106 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10107 {
10108 if (h->root.type == bfd_link_hash_indirect)
10109 return TRUE;
10110
10111 if (h->root.type == bfd_link_hash_warning)
10112 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10113
10114 merge_got_entries (&h->got.glist);
10115
10116 return TRUE;
10117 }
10118
10119 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10120 symbol H. */
10121
10122 static bfd_boolean
10123 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10124 {
10125 struct got_entry *gent;
10126
10127 if (h->root.type == bfd_link_hash_indirect)
10128 return TRUE;
10129
10130 if (h->root.type == bfd_link_hash_warning)
10131 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10132
10133 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10134 if (!gent->is_indirect)
10135 allocate_got (h, (struct bfd_link_info *) inf, gent);
10136 return TRUE;
10137 }
10138
10139 /* Called on the first multitoc pass after the last call to
10140 ppc64_elf_next_toc_section. This function removes duplicate GOT
10141 entries. */
10142
10143 bfd_boolean
10144 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10145 {
10146 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10147 struct bfd *ibfd, *ibfd2;
10148 bfd_boolean done_something;
10149
10150 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10151
10152 if (!htab->do_multi_toc)
10153 return FALSE;
10154
10155 /* Merge global sym got entries within a toc group. */
10156 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10157
10158 /* And tlsld_got. */
10159 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10160 {
10161 struct got_entry *ent, *ent2;
10162
10163 if (!is_ppc64_elf (ibfd))
10164 continue;
10165
10166 ent = ppc64_tlsld_got (ibfd);
10167 if (!ent->is_indirect
10168 && ent->got.offset != (bfd_vma) -1)
10169 {
10170 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10171 {
10172 if (!is_ppc64_elf (ibfd2))
10173 continue;
10174
10175 ent2 = ppc64_tlsld_got (ibfd2);
10176 if (!ent2->is_indirect
10177 && ent2->got.offset != (bfd_vma) -1
10178 && elf_gp (ibfd2) == elf_gp (ibfd))
10179 {
10180 ent2->is_indirect = TRUE;
10181 ent2->got.ent = ent;
10182 }
10183 }
10184 }
10185 }
10186
10187 /* Zap sizes of got sections. */
10188 htab->reliplt->rawsize = htab->reliplt->size;
10189 htab->reliplt->size -= htab->got_reli_size;
10190 htab->got_reli_size = 0;
10191
10192 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10193 {
10194 asection *got, *relgot;
10195
10196 if (!is_ppc64_elf (ibfd))
10197 continue;
10198
10199 got = ppc64_elf_tdata (ibfd)->got;
10200 if (got != NULL)
10201 {
10202 got->rawsize = got->size;
10203 got->size = 0;
10204 relgot = ppc64_elf_tdata (ibfd)->relgot;
10205 relgot->rawsize = relgot->size;
10206 relgot->size = 0;
10207 }
10208 }
10209
10210 /* Now reallocate the got, local syms first. We don't need to
10211 allocate section contents again since we never increase size. */
10212 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10213 {
10214 struct got_entry **lgot_ents;
10215 struct got_entry **end_lgot_ents;
10216 struct plt_entry **local_plt;
10217 struct plt_entry **end_local_plt;
10218 unsigned char *lgot_masks;
10219 bfd_size_type locsymcount;
10220 Elf_Internal_Shdr *symtab_hdr;
10221 asection *s, *srel;
10222
10223 if (!is_ppc64_elf (ibfd))
10224 continue;
10225
10226 lgot_ents = elf_local_got_ents (ibfd);
10227 if (!lgot_ents)
10228 continue;
10229
10230 symtab_hdr = &elf_symtab_hdr (ibfd);
10231 locsymcount = symtab_hdr->sh_info;
10232 end_lgot_ents = lgot_ents + locsymcount;
10233 local_plt = (struct plt_entry **) end_lgot_ents;
10234 end_local_plt = local_plt + locsymcount;
10235 lgot_masks = (unsigned char *) end_local_plt;
10236 s = ppc64_elf_tdata (ibfd)->got;
10237 srel = ppc64_elf_tdata (ibfd)->relgot;
10238 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10239 {
10240 struct got_entry *ent;
10241
10242 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10243 {
10244 unsigned int num = 1;
10245 ent->got.offset = s->size;
10246 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10247 num = 2;
10248 s->size += num * 8;
10249 if (info->shared)
10250 srel->size += num * sizeof (Elf64_External_Rela);
10251 else if ((*lgot_masks & PLT_IFUNC) != 0)
10252 {
10253 htab->reliplt->size
10254 += num * sizeof (Elf64_External_Rela);
10255 htab->got_reli_size
10256 += num * sizeof (Elf64_External_Rela);
10257 }
10258 }
10259 }
10260 }
10261
10262 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10263
10264 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10265 {
10266 struct got_entry *ent;
10267
10268 if (!is_ppc64_elf (ibfd))
10269 continue;
10270
10271 ent = ppc64_tlsld_got (ibfd);
10272 if (!ent->is_indirect
10273 && ent->got.offset != (bfd_vma) -1)
10274 {
10275 asection *s = ppc64_elf_tdata (ibfd)->got;
10276 ent->got.offset = s->size;
10277 s->size += 16;
10278 if (info->shared)
10279 {
10280 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10281 srel->size += sizeof (Elf64_External_Rela);
10282 }
10283 }
10284 }
10285
10286 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10287 if (!done_something)
10288 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10289 {
10290 asection *got;
10291
10292 if (!is_ppc64_elf (ibfd))
10293 continue;
10294
10295 got = ppc64_elf_tdata (ibfd)->got;
10296 if (got != NULL)
10297 {
10298 done_something = got->rawsize != got->size;
10299 if (done_something)
10300 break;
10301 }
10302 }
10303
10304 if (done_something)
10305 (*htab->layout_sections_again) ();
10306
10307 /* Set up for second pass over toc sections to recalculate elf_gp
10308 on input sections. */
10309 htab->toc_bfd = NULL;
10310 htab->toc_first_sec = NULL;
10311 htab->second_toc_pass = TRUE;
10312 return done_something;
10313 }
10314
10315 /* Called after second pass of multitoc partitioning. */
10316
10317 void
10318 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10319 {
10320 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10321
10322 /* After the second pass, toc_curr tracks the TOC offset used
10323 for code sections below in ppc64_elf_next_input_section. */
10324 htab->toc_curr = TOC_BASE_OFF;
10325 }
10326
10327 /* No toc references were found in ISEC. If the code in ISEC makes no
10328 calls, then there's no need to use toc adjusting stubs when branching
10329 into ISEC. Actually, indirect calls from ISEC are OK as they will
10330 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10331 needed, and 2 if a cyclical call-graph was found but no other reason
10332 for a stub was detected. If called from the top level, a return of
10333 2 means the same as a return of 0. */
10334
10335 static int
10336 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10337 {
10338 int ret;
10339
10340 /* Mark this section as checked. */
10341 isec->call_check_done = 1;
10342
10343 /* We know none of our code bearing sections will need toc stubs. */
10344 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10345 return 0;
10346
10347 if (isec->size == 0)
10348 return 0;
10349
10350 if (isec->output_section == NULL)
10351 return 0;
10352
10353 ret = 0;
10354 if (isec->reloc_count != 0)
10355 {
10356 Elf_Internal_Rela *relstart, *rel;
10357 Elf_Internal_Sym *local_syms;
10358 struct ppc_link_hash_table *htab;
10359
10360 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10361 info->keep_memory);
10362 if (relstart == NULL)
10363 return -1;
10364
10365 /* Look for branches to outside of this section. */
10366 local_syms = NULL;
10367 htab = ppc_hash_table (info);
10368 if (htab == NULL)
10369 return -1;
10370
10371 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10372 {
10373 enum elf_ppc64_reloc_type r_type;
10374 unsigned long r_symndx;
10375 struct elf_link_hash_entry *h;
10376 struct ppc_link_hash_entry *eh;
10377 Elf_Internal_Sym *sym;
10378 asection *sym_sec;
10379 struct _opd_sec_data *opd;
10380 bfd_vma sym_value;
10381 bfd_vma dest;
10382
10383 r_type = ELF64_R_TYPE (rel->r_info);
10384 if (r_type != R_PPC64_REL24
10385 && r_type != R_PPC64_REL14
10386 && r_type != R_PPC64_REL14_BRTAKEN
10387 && r_type != R_PPC64_REL14_BRNTAKEN)
10388 continue;
10389
10390 r_symndx = ELF64_R_SYM (rel->r_info);
10391 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10392 isec->owner))
10393 {
10394 ret = -1;
10395 break;
10396 }
10397
10398 /* Calls to dynamic lib functions go through a plt call stub
10399 that uses r2. */
10400 eh = (struct ppc_link_hash_entry *) h;
10401 if (eh != NULL
10402 && (eh->elf.plt.plist != NULL
10403 || (eh->oh != NULL
10404 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10405 {
10406 ret = 1;
10407 break;
10408 }
10409
10410 if (sym_sec == NULL)
10411 /* Ignore other undefined symbols. */
10412 continue;
10413
10414 /* Assume branches to other sections not included in the
10415 link need stubs too, to cover -R and absolute syms. */
10416 if (sym_sec->output_section == NULL)
10417 {
10418 ret = 1;
10419 break;
10420 }
10421
10422 if (h == NULL)
10423 sym_value = sym->st_value;
10424 else
10425 {
10426 if (h->root.type != bfd_link_hash_defined
10427 && h->root.type != bfd_link_hash_defweak)
10428 abort ();
10429 sym_value = h->root.u.def.value;
10430 }
10431 sym_value += rel->r_addend;
10432
10433 /* If this branch reloc uses an opd sym, find the code section. */
10434 opd = get_opd_info (sym_sec);
10435 if (opd != NULL)
10436 {
10437 if (h == NULL && opd->adjust != NULL)
10438 {
10439 long adjust;
10440
10441 adjust = opd->adjust[sym->st_value / 8];
10442 if (adjust == -1)
10443 /* Assume deleted functions won't ever be called. */
10444 continue;
10445 sym_value += adjust;
10446 }
10447
10448 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10449 if (dest == (bfd_vma) -1)
10450 continue;
10451 }
10452 else
10453 dest = (sym_value
10454 + sym_sec->output_offset
10455 + sym_sec->output_section->vma);
10456
10457 /* Ignore branch to self. */
10458 if (sym_sec == isec)
10459 continue;
10460
10461 /* If the called function uses the toc, we need a stub. */
10462 if (sym_sec->has_toc_reloc
10463 || sym_sec->makes_toc_func_call)
10464 {
10465 ret = 1;
10466 break;
10467 }
10468
10469 /* Assume any branch that needs a long branch stub might in fact
10470 need a plt_branch stub. A plt_branch stub uses r2. */
10471 else if (dest - (isec->output_offset
10472 + isec->output_section->vma
10473 + rel->r_offset) + (1 << 25) >= (2 << 25))
10474 {
10475 ret = 1;
10476 break;
10477 }
10478
10479 /* If calling back to a section in the process of being
10480 tested, we can't say for sure that no toc adjusting stubs
10481 are needed, so don't return zero. */
10482 else if (sym_sec->call_check_in_progress)
10483 ret = 2;
10484
10485 /* Branches to another section that itself doesn't have any TOC
10486 references are OK. Recursively call ourselves to check. */
10487 else if (!sym_sec->call_check_done)
10488 {
10489 int recur;
10490
10491 /* Mark current section as indeterminate, so that other
10492 sections that call back to current won't be marked as
10493 known. */
10494 isec->call_check_in_progress = 1;
10495 recur = toc_adjusting_stub_needed (info, sym_sec);
10496 isec->call_check_in_progress = 0;
10497
10498 if (recur != 0)
10499 {
10500 ret = recur;
10501 if (recur != 2)
10502 break;
10503 }
10504 }
10505 }
10506
10507 if (local_syms != NULL
10508 && (elf_symtab_hdr (isec->owner).contents
10509 != (unsigned char *) local_syms))
10510 free (local_syms);
10511 if (elf_section_data (isec)->relocs != relstart)
10512 free (relstart);
10513 }
10514
10515 if ((ret & 1) == 0
10516 && isec->map_head.s != NULL
10517 && (strcmp (isec->output_section->name, ".init") == 0
10518 || strcmp (isec->output_section->name, ".fini") == 0))
10519 {
10520 if (isec->map_head.s->has_toc_reloc
10521 || isec->map_head.s->makes_toc_func_call)
10522 ret = 1;
10523 else if (!isec->map_head.s->call_check_done)
10524 {
10525 int recur;
10526 isec->call_check_in_progress = 1;
10527 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10528 isec->call_check_in_progress = 0;
10529 if (recur != 0)
10530 ret = recur;
10531 }
10532 }
10533
10534 if (ret == 1)
10535 isec->makes_toc_func_call = 1;
10536
10537 return ret;
10538 }
10539
10540 /* The linker repeatedly calls this function for each input section,
10541 in the order that input sections are linked into output sections.
10542 Build lists of input sections to determine groupings between which
10543 we may insert linker stubs. */
10544
10545 bfd_boolean
10546 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10547 {
10548 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10549
10550 if (htab == NULL)
10551 return FALSE;
10552
10553 if ((isec->output_section->flags & SEC_CODE) != 0
10554 && isec->output_section->index <= htab->top_index)
10555 {
10556 asection **list = htab->input_list + isec->output_section->index;
10557 /* Steal the link_sec pointer for our list. */
10558 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10559 /* This happens to make the list in reverse order,
10560 which is what we want. */
10561 PREV_SEC (isec) = *list;
10562 *list = isec;
10563 }
10564
10565 if (htab->multi_toc_needed)
10566 {
10567 /* If a code section has a function that uses the TOC then we need
10568 to use the right TOC (obviously). Also, make sure that .opd gets
10569 the correct TOC value for R_PPC64_TOC relocs that don't have or
10570 can't find their function symbol (shouldn't ever happen now).
10571 Also specially treat .fixup for the linux kernel. .fixup
10572 contains branches, but only back to the function that hit an
10573 exception. */
10574 if (isec->has_toc_reloc
10575 || (isec->flags & SEC_CODE) == 0
10576 || strcmp (isec->name, ".fixup") == 0)
10577 {
10578 if (elf_gp (isec->owner) != 0)
10579 htab->toc_curr = elf_gp (isec->owner);
10580 }
10581 else if (!isec->call_check_done
10582 && toc_adjusting_stub_needed (info, isec) < 0)
10583 return FALSE;
10584 }
10585
10586 /* Functions that don't use the TOC can belong in any TOC group.
10587 Use the last TOC base. This happens to make _init and _fini
10588 pasting work, because the fragments generally don't use the TOC. */
10589 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10590 return TRUE;
10591 }
10592
10593 /* Check that all .init and .fini sections use the same toc, if they
10594 have toc relocs. */
10595
10596 static bfd_boolean
10597 check_pasted_section (struct bfd_link_info *info, const char *name)
10598 {
10599 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10600
10601 if (o != NULL)
10602 {
10603 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10604 bfd_vma toc_off = 0;
10605 asection *i;
10606
10607 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10608 if (i->has_toc_reloc)
10609 {
10610 if (toc_off == 0)
10611 toc_off = htab->stub_group[i->id].toc_off;
10612 else if (toc_off != htab->stub_group[i->id].toc_off)
10613 return FALSE;
10614 }
10615 /* Make sure the whole pasted function uses the same toc offset. */
10616 if (toc_off != 0)
10617 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10618 htab->stub_group[i->id].toc_off = toc_off;
10619 }
10620 return TRUE;
10621 }
10622
10623 bfd_boolean
10624 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10625 {
10626 return (check_pasted_section (info, ".init")
10627 & check_pasted_section (info, ".fini"));
10628 }
10629
10630 /* See whether we can group stub sections together. Grouping stub
10631 sections may result in fewer stubs. More importantly, we need to
10632 put all .init* and .fini* stubs at the beginning of the .init or
10633 .fini output sections respectively, because glibc splits the
10634 _init and _fini functions into multiple parts. Putting a stub in
10635 the middle of a function is not a good idea. */
10636
10637 static void
10638 group_sections (struct ppc_link_hash_table *htab,
10639 bfd_size_type stub_group_size,
10640 bfd_boolean stubs_always_before_branch)
10641 {
10642 asection **list;
10643 bfd_size_type stub14_group_size;
10644 bfd_boolean suppress_size_errors;
10645
10646 suppress_size_errors = FALSE;
10647 stub14_group_size = stub_group_size;
10648 if (stub_group_size == 1)
10649 {
10650 /* Default values. */
10651 if (stubs_always_before_branch)
10652 {
10653 stub_group_size = 0x1e00000;
10654 stub14_group_size = 0x7800;
10655 }
10656 else
10657 {
10658 stub_group_size = 0x1c00000;
10659 stub14_group_size = 0x7000;
10660 }
10661 suppress_size_errors = TRUE;
10662 }
10663
10664 list = htab->input_list + htab->top_index;
10665 do
10666 {
10667 asection *tail = *list;
10668 while (tail != NULL)
10669 {
10670 asection *curr;
10671 asection *prev;
10672 bfd_size_type total;
10673 bfd_boolean big_sec;
10674 bfd_vma curr_toc;
10675
10676 curr = tail;
10677 total = tail->size;
10678 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10679 && ppc64_elf_section_data (tail)->has_14bit_branch
10680 ? stub14_group_size : stub_group_size);
10681 if (big_sec && !suppress_size_errors)
10682 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10683 tail->owner, tail);
10684 curr_toc = htab->stub_group[tail->id].toc_off;
10685
10686 while ((prev = PREV_SEC (curr)) != NULL
10687 && ((total += curr->output_offset - prev->output_offset)
10688 < (ppc64_elf_section_data (prev) != NULL
10689 && ppc64_elf_section_data (prev)->has_14bit_branch
10690 ? stub14_group_size : stub_group_size))
10691 && htab->stub_group[prev->id].toc_off == curr_toc)
10692 curr = prev;
10693
10694 /* OK, the size from the start of CURR to the end is less
10695 than stub_group_size and thus can be handled by one stub
10696 section. (or the tail section is itself larger than
10697 stub_group_size, in which case we may be toast.) We
10698 should really be keeping track of the total size of stubs
10699 added here, as stubs contribute to the final output
10700 section size. That's a little tricky, and this way will
10701 only break if stubs added make the total size more than
10702 2^25, ie. for the default stub_group_size, if stubs total
10703 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10704 do
10705 {
10706 prev = PREV_SEC (tail);
10707 /* Set up this stub group. */
10708 htab->stub_group[tail->id].link_sec = curr;
10709 }
10710 while (tail != curr && (tail = prev) != NULL);
10711
10712 /* But wait, there's more! Input sections up to stub_group_size
10713 bytes before the stub section can be handled by it too.
10714 Don't do this if we have a really large section after the
10715 stubs, as adding more stubs increases the chance that
10716 branches may not reach into the stub section. */
10717 if (!stubs_always_before_branch && !big_sec)
10718 {
10719 total = 0;
10720 while (prev != NULL
10721 && ((total += tail->output_offset - prev->output_offset)
10722 < (ppc64_elf_section_data (prev) != NULL
10723 && ppc64_elf_section_data (prev)->has_14bit_branch
10724 ? stub14_group_size : stub_group_size))
10725 && htab->stub_group[prev->id].toc_off == curr_toc)
10726 {
10727 tail = prev;
10728 prev = PREV_SEC (tail);
10729 htab->stub_group[tail->id].link_sec = curr;
10730 }
10731 }
10732 tail = prev;
10733 }
10734 }
10735 while (list-- != htab->input_list);
10736 free (htab->input_list);
10737 #undef PREV_SEC
10738 }
10739
10740 /* Determine and set the size of the stub section for a final link.
10741
10742 The basic idea here is to examine all the relocations looking for
10743 PC-relative calls to a target that is unreachable with a "bl"
10744 instruction. */
10745
10746 bfd_boolean
10747 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10748 {
10749 bfd_size_type stub_group_size;
10750 bfd_boolean stubs_always_before_branch;
10751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10752
10753 if (htab == NULL)
10754 return FALSE;
10755
10756 stubs_always_before_branch = group_size < 0;
10757 if (group_size < 0)
10758 stub_group_size = -group_size;
10759 else
10760 stub_group_size = group_size;
10761
10762 group_sections (htab, stub_group_size, stubs_always_before_branch);
10763
10764 while (1)
10765 {
10766 bfd *input_bfd;
10767 unsigned int bfd_indx;
10768 asection *stub_sec;
10769
10770 htab->stub_iteration += 1;
10771
10772 for (input_bfd = info->input_bfds, bfd_indx = 0;
10773 input_bfd != NULL;
10774 input_bfd = input_bfd->link_next, bfd_indx++)
10775 {
10776 Elf_Internal_Shdr *symtab_hdr;
10777 asection *section;
10778 Elf_Internal_Sym *local_syms = NULL;
10779
10780 if (!is_ppc64_elf (input_bfd))
10781 continue;
10782
10783 /* We'll need the symbol table in a second. */
10784 symtab_hdr = &elf_symtab_hdr (input_bfd);
10785 if (symtab_hdr->sh_info == 0)
10786 continue;
10787
10788 /* Walk over each section attached to the input bfd. */
10789 for (section = input_bfd->sections;
10790 section != NULL;
10791 section = section->next)
10792 {
10793 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10794
10795 /* If there aren't any relocs, then there's nothing more
10796 to do. */
10797 if ((section->flags & SEC_RELOC) == 0
10798 || (section->flags & SEC_ALLOC) == 0
10799 || (section->flags & SEC_LOAD) == 0
10800 || (section->flags & SEC_CODE) == 0
10801 || section->reloc_count == 0)
10802 continue;
10803
10804 /* If this section is a link-once section that will be
10805 discarded, then don't create any stubs. */
10806 if (section->output_section == NULL
10807 || section->output_section->owner != info->output_bfd)
10808 continue;
10809
10810 /* Get the relocs. */
10811 internal_relocs
10812 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10813 info->keep_memory);
10814 if (internal_relocs == NULL)
10815 goto error_ret_free_local;
10816
10817 /* Now examine each relocation. */
10818 irela = internal_relocs;
10819 irelaend = irela + section->reloc_count;
10820 for (; irela < irelaend; irela++)
10821 {
10822 enum elf_ppc64_reloc_type r_type;
10823 unsigned int r_indx;
10824 enum ppc_stub_type stub_type;
10825 struct ppc_stub_hash_entry *stub_entry;
10826 asection *sym_sec, *code_sec;
10827 bfd_vma sym_value, code_value;
10828 bfd_vma destination;
10829 bfd_boolean ok_dest;
10830 struct ppc_link_hash_entry *hash;
10831 struct ppc_link_hash_entry *fdh;
10832 struct elf_link_hash_entry *h;
10833 Elf_Internal_Sym *sym;
10834 char *stub_name;
10835 const asection *id_sec;
10836 struct _opd_sec_data *opd;
10837 struct plt_entry *plt_ent;
10838
10839 r_type = ELF64_R_TYPE (irela->r_info);
10840 r_indx = ELF64_R_SYM (irela->r_info);
10841
10842 if (r_type >= R_PPC64_max)
10843 {
10844 bfd_set_error (bfd_error_bad_value);
10845 goto error_ret_free_internal;
10846 }
10847
10848 /* Only look for stubs on branch instructions. */
10849 if (r_type != R_PPC64_REL24
10850 && r_type != R_PPC64_REL14
10851 && r_type != R_PPC64_REL14_BRTAKEN
10852 && r_type != R_PPC64_REL14_BRNTAKEN)
10853 continue;
10854
10855 /* Now determine the call target, its name, value,
10856 section. */
10857 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10858 r_indx, input_bfd))
10859 goto error_ret_free_internal;
10860 hash = (struct ppc_link_hash_entry *) h;
10861
10862 ok_dest = FALSE;
10863 fdh = NULL;
10864 sym_value = 0;
10865 if (hash == NULL)
10866 {
10867 sym_value = sym->st_value;
10868 ok_dest = TRUE;
10869 }
10870 else if (hash->elf.root.type == bfd_link_hash_defined
10871 || hash->elf.root.type == bfd_link_hash_defweak)
10872 {
10873 sym_value = hash->elf.root.u.def.value;
10874 if (sym_sec->output_section != NULL)
10875 ok_dest = TRUE;
10876 }
10877 else if (hash->elf.root.type == bfd_link_hash_undefweak
10878 || hash->elf.root.type == bfd_link_hash_undefined)
10879 {
10880 /* Recognise an old ABI func code entry sym, and
10881 use the func descriptor sym instead if it is
10882 defined. */
10883 if (hash->elf.root.root.string[0] == '.'
10884 && (fdh = lookup_fdh (hash, htab)) != NULL)
10885 {
10886 if (fdh->elf.root.type == bfd_link_hash_defined
10887 || fdh->elf.root.type == bfd_link_hash_defweak)
10888 {
10889 sym_sec = fdh->elf.root.u.def.section;
10890 sym_value = fdh->elf.root.u.def.value;
10891 if (sym_sec->output_section != NULL)
10892 ok_dest = TRUE;
10893 }
10894 else
10895 fdh = NULL;
10896 }
10897 }
10898 else
10899 {
10900 bfd_set_error (bfd_error_bad_value);
10901 goto error_ret_free_internal;
10902 }
10903
10904 destination = 0;
10905 if (ok_dest)
10906 {
10907 sym_value += irela->r_addend;
10908 destination = (sym_value
10909 + sym_sec->output_offset
10910 + sym_sec->output_section->vma);
10911 }
10912
10913 code_sec = sym_sec;
10914 code_value = sym_value;
10915 opd = get_opd_info (sym_sec);
10916 if (opd != NULL)
10917 {
10918 bfd_vma dest;
10919
10920 if (hash == NULL && opd->adjust != NULL)
10921 {
10922 long adjust = opd->adjust[sym_value / 8];
10923 if (adjust == -1)
10924 continue;
10925 code_value += adjust;
10926 sym_value += adjust;
10927 }
10928 dest = opd_entry_value (sym_sec, sym_value,
10929 &code_sec, &code_value);
10930 if (dest != (bfd_vma) -1)
10931 {
10932 destination = dest;
10933 if (fdh != NULL)
10934 {
10935 /* Fixup old ABI sym to point at code
10936 entry. */
10937 hash->elf.root.type = bfd_link_hash_defweak;
10938 hash->elf.root.u.def.section = code_sec;
10939 hash->elf.root.u.def.value = code_value;
10940 }
10941 }
10942 }
10943
10944 /* Determine what (if any) linker stub is needed. */
10945 plt_ent = NULL;
10946 stub_type = ppc_type_of_stub (section, irela, &hash,
10947 &plt_ent, destination);
10948
10949 if (stub_type != ppc_stub_plt_call)
10950 {
10951 /* Check whether we need a TOC adjusting stub.
10952 Since the linker pastes together pieces from
10953 different object files when creating the
10954 _init and _fini functions, it may be that a
10955 call to what looks like a local sym is in
10956 fact a call needing a TOC adjustment. */
10957 if (code_sec != NULL
10958 && code_sec->output_section != NULL
10959 && (htab->stub_group[code_sec->id].toc_off
10960 != htab->stub_group[section->id].toc_off)
10961 && (code_sec->has_toc_reloc
10962 || code_sec->makes_toc_func_call))
10963 stub_type = ppc_stub_long_branch_r2off;
10964 }
10965
10966 if (stub_type == ppc_stub_none)
10967 continue;
10968
10969 /* __tls_get_addr calls might be eliminated. */
10970 if (stub_type != ppc_stub_plt_call
10971 && hash != NULL
10972 && (hash == htab->tls_get_addr
10973 || hash == htab->tls_get_addr_fd)
10974 && section->has_tls_reloc
10975 && irela != internal_relocs)
10976 {
10977 /* Get tls info. */
10978 unsigned char *tls_mask;
10979
10980 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10981 irela - 1, input_bfd))
10982 goto error_ret_free_internal;
10983 if (*tls_mask != 0)
10984 continue;
10985 }
10986
10987 /* Support for grouping stub sections. */
10988 id_sec = htab->stub_group[section->id].link_sec;
10989
10990 /* Get the name of this stub. */
10991 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10992 if (!stub_name)
10993 goto error_ret_free_internal;
10994
10995 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10996 stub_name, FALSE, FALSE);
10997 if (stub_entry != NULL)
10998 {
10999 /* The proper stub has already been created. */
11000 free (stub_name);
11001 continue;
11002 }
11003
11004 stub_entry = ppc_add_stub (stub_name, section, htab);
11005 if (stub_entry == NULL)
11006 {
11007 free (stub_name);
11008 error_ret_free_internal:
11009 if (elf_section_data (section)->relocs == NULL)
11010 free (internal_relocs);
11011 error_ret_free_local:
11012 if (local_syms != NULL
11013 && (symtab_hdr->contents
11014 != (unsigned char *) local_syms))
11015 free (local_syms);
11016 return FALSE;
11017 }
11018
11019 stub_entry->stub_type = stub_type;
11020 if (stub_type != ppc_stub_plt_call)
11021 {
11022 stub_entry->target_value = code_value;
11023 stub_entry->target_section = code_sec;
11024 }
11025 else
11026 {
11027 stub_entry->target_value = sym_value;
11028 stub_entry->target_section = sym_sec;
11029 }
11030 stub_entry->h = hash;
11031 stub_entry->plt_ent = plt_ent;
11032 stub_entry->addend = irela->r_addend;
11033
11034 if (stub_entry->h != NULL)
11035 htab->stub_globals += 1;
11036 }
11037
11038 /* We're done with the internal relocs, free them. */
11039 if (elf_section_data (section)->relocs != internal_relocs)
11040 free (internal_relocs);
11041 }
11042
11043 if (local_syms != NULL
11044 && symtab_hdr->contents != (unsigned char *) local_syms)
11045 {
11046 if (!info->keep_memory)
11047 free (local_syms);
11048 else
11049 symtab_hdr->contents = (unsigned char *) local_syms;
11050 }
11051 }
11052
11053 /* We may have added some stubs. Find out the new size of the
11054 stub sections. */
11055 for (stub_sec = htab->stub_bfd->sections;
11056 stub_sec != NULL;
11057 stub_sec = stub_sec->next)
11058 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11059 {
11060 stub_sec->rawsize = stub_sec->size;
11061 stub_sec->size = 0;
11062 stub_sec->reloc_count = 0;
11063 stub_sec->flags &= ~SEC_RELOC;
11064 }
11065
11066 htab->brlt->size = 0;
11067 htab->brlt->reloc_count = 0;
11068 htab->brlt->flags &= ~SEC_RELOC;
11069 if (htab->relbrlt != NULL)
11070 htab->relbrlt->size = 0;
11071
11072 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11073
11074 if (info->emitrelocations
11075 && htab->glink != NULL && htab->glink->size != 0)
11076 {
11077 htab->glink->reloc_count = 1;
11078 htab->glink->flags |= SEC_RELOC;
11079 }
11080
11081 for (stub_sec = htab->stub_bfd->sections;
11082 stub_sec != NULL;
11083 stub_sec = stub_sec->next)
11084 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11085 && stub_sec->rawsize != stub_sec->size)
11086 break;
11087
11088 /* Exit from this loop when no stubs have been added, and no stubs
11089 have changed size. */
11090 if (stub_sec == NULL)
11091 break;
11092
11093 /* Ask the linker to do its stuff. */
11094 (*htab->layout_sections_again) ();
11095 }
11096
11097 /* It would be nice to strip htab->brlt from the output if the
11098 section is empty, but it's too late. If we strip sections here,
11099 the dynamic symbol table is corrupted since the section symbol
11100 for the stripped section isn't written. */
11101
11102 return TRUE;
11103 }
11104
11105 /* Called after we have determined section placement. If sections
11106 move, we'll be called again. Provide a value for TOCstart. */
11107
11108 bfd_vma
11109 ppc64_elf_toc (bfd *obfd)
11110 {
11111 asection *s;
11112 bfd_vma TOCstart;
11113
11114 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11115 order. The TOC starts where the first of these sections starts. */
11116 s = bfd_get_section_by_name (obfd, ".got");
11117 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11118 s = bfd_get_section_by_name (obfd, ".toc");
11119 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11120 s = bfd_get_section_by_name (obfd, ".tocbss");
11121 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11122 s = bfd_get_section_by_name (obfd, ".plt");
11123 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11124 {
11125 /* This may happen for
11126 o references to TOC base (SYM@toc / TOC[tc0]) without a
11127 .toc directive
11128 o bad linker script
11129 o --gc-sections and empty TOC sections
11130
11131 FIXME: Warn user? */
11132
11133 /* Look for a likely section. We probably won't even be
11134 using TOCstart. */
11135 for (s = obfd->sections; s != NULL; s = s->next)
11136 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11137 | SEC_EXCLUDE))
11138 == (SEC_ALLOC | SEC_SMALL_DATA))
11139 break;
11140 if (s == NULL)
11141 for (s = obfd->sections; s != NULL; s = s->next)
11142 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11143 == (SEC_ALLOC | SEC_SMALL_DATA))
11144 break;
11145 if (s == NULL)
11146 for (s = obfd->sections; s != NULL; s = s->next)
11147 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11148 == SEC_ALLOC)
11149 break;
11150 if (s == NULL)
11151 for (s = obfd->sections; s != NULL; s = s->next)
11152 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11153 break;
11154 }
11155
11156 TOCstart = 0;
11157 if (s != NULL)
11158 TOCstart = s->output_section->vma + s->output_offset;
11159
11160 return TOCstart;
11161 }
11162
11163 /* Build all the stubs associated with the current output file.
11164 The stubs are kept in a hash table attached to the main linker
11165 hash table. This function is called via gldelf64ppc_finish. */
11166
11167 bfd_boolean
11168 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11169 struct bfd_link_info *info,
11170 char **stats)
11171 {
11172 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11173 asection *stub_sec;
11174 bfd_byte *p;
11175 int stub_sec_count = 0;
11176
11177 if (htab == NULL)
11178 return FALSE;
11179
11180 htab->emit_stub_syms = emit_stub_syms;
11181
11182 /* Allocate memory to hold the linker stubs. */
11183 for (stub_sec = htab->stub_bfd->sections;
11184 stub_sec != NULL;
11185 stub_sec = stub_sec->next)
11186 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11187 && stub_sec->size != 0)
11188 {
11189 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11190 if (stub_sec->contents == NULL)
11191 return FALSE;
11192 /* We want to check that built size is the same as calculated
11193 size. rawsize is a convenient location to use. */
11194 stub_sec->rawsize = stub_sec->size;
11195 stub_sec->size = 0;
11196 }
11197
11198 if (htab->glink != NULL && htab->glink->size != 0)
11199 {
11200 unsigned int indx;
11201 bfd_vma plt0;
11202
11203 /* Build the .glink plt call stub. */
11204 if (htab->emit_stub_syms)
11205 {
11206 struct elf_link_hash_entry *h;
11207 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11208 TRUE, FALSE, FALSE);
11209 if (h == NULL)
11210 return FALSE;
11211 if (h->root.type == bfd_link_hash_new)
11212 {
11213 h->root.type = bfd_link_hash_defined;
11214 h->root.u.def.section = htab->glink;
11215 h->root.u.def.value = 8;
11216 h->ref_regular = 1;
11217 h->def_regular = 1;
11218 h->ref_regular_nonweak = 1;
11219 h->forced_local = 1;
11220 h->non_elf = 0;
11221 }
11222 }
11223 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11224 if (info->emitrelocations)
11225 {
11226 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11227 if (r == NULL)
11228 return FALSE;
11229 r->r_offset = (htab->glink->output_offset
11230 + htab->glink->output_section->vma);
11231 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11232 r->r_addend = plt0;
11233 }
11234 p = htab->glink->contents;
11235 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11236 bfd_put_64 (htab->glink->owner, plt0, p);
11237 p += 8;
11238 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11239 p += 4;
11240 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11241 p += 4;
11242 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11243 p += 4;
11244 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11245 p += 4;
11246 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11247 p += 4;
11248 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11249 p += 4;
11250 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11251 p += 4;
11252 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11253 p += 4;
11254 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11255 p += 4;
11256 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11257 p += 4;
11258 bfd_put_32 (htab->glink->owner, BCTR, p);
11259 p += 4;
11260 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11261 {
11262 bfd_put_32 (htab->glink->owner, NOP, p);
11263 p += 4;
11264 }
11265
11266 /* Build the .glink lazy link call stubs. */
11267 indx = 0;
11268 while (p < htab->glink->contents + htab->glink->size)
11269 {
11270 if (indx < 0x8000)
11271 {
11272 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11273 p += 4;
11274 }
11275 else
11276 {
11277 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11278 p += 4;
11279 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11280 p += 4;
11281 }
11282 bfd_put_32 (htab->glink->owner,
11283 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11284 indx++;
11285 p += 4;
11286 }
11287 htab->glink->rawsize = p - htab->glink->contents;
11288 }
11289
11290 if (htab->brlt->size != 0)
11291 {
11292 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11293 htab->brlt->size);
11294 if (htab->brlt->contents == NULL)
11295 return FALSE;
11296 }
11297 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11298 {
11299 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11300 htab->relbrlt->size);
11301 if (htab->relbrlt->contents == NULL)
11302 return FALSE;
11303 }
11304
11305 /* Build the stubs as directed by the stub hash table. */
11306 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11307
11308 if (htab->relbrlt != NULL)
11309 htab->relbrlt->reloc_count = 0;
11310
11311 for (stub_sec = htab->stub_bfd->sections;
11312 stub_sec != NULL;
11313 stub_sec = stub_sec->next)
11314 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11315 {
11316 stub_sec_count += 1;
11317 if (stub_sec->rawsize != stub_sec->size)
11318 break;
11319 }
11320
11321 if (stub_sec != NULL
11322 || htab->glink->rawsize != htab->glink->size)
11323 {
11324 htab->stub_error = TRUE;
11325 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11326 }
11327
11328 if (htab->stub_error)
11329 return FALSE;
11330
11331 if (stats != NULL)
11332 {
11333 *stats = bfd_malloc (500);
11334 if (*stats == NULL)
11335 return FALSE;
11336
11337 sprintf (*stats, _("linker stubs in %u group%s\n"
11338 " branch %lu\n"
11339 " toc adjust %lu\n"
11340 " long branch %lu\n"
11341 " long toc adj %lu\n"
11342 " plt call %lu"),
11343 stub_sec_count,
11344 stub_sec_count == 1 ? "" : "s",
11345 htab->stub_count[ppc_stub_long_branch - 1],
11346 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11347 htab->stub_count[ppc_stub_plt_branch - 1],
11348 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11349 htab->stub_count[ppc_stub_plt_call - 1]);
11350 }
11351 return TRUE;
11352 }
11353
11354 /* This function undoes the changes made by add_symbol_adjust. */
11355
11356 static bfd_boolean
11357 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11358 {
11359 struct ppc_link_hash_entry *eh;
11360
11361 if (h->root.type == bfd_link_hash_indirect)
11362 return TRUE;
11363
11364 if (h->root.type == bfd_link_hash_warning)
11365 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11366
11367 eh = (struct ppc_link_hash_entry *) h;
11368 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11369 return TRUE;
11370
11371 eh->elf.root.type = bfd_link_hash_undefined;
11372 return TRUE;
11373 }
11374
11375 void
11376 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11377 {
11378 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11379
11380 if (htab != NULL)
11381 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11382 }
11383
11384 /* What to do when ld finds relocations against symbols defined in
11385 discarded sections. */
11386
11387 static unsigned int
11388 ppc64_elf_action_discarded (asection *sec)
11389 {
11390 if (strcmp (".opd", sec->name) == 0)
11391 return 0;
11392
11393 if (strcmp (".toc", sec->name) == 0)
11394 return 0;
11395
11396 if (strcmp (".toc1", sec->name) == 0)
11397 return 0;
11398
11399 return _bfd_elf_default_action_discarded (sec);
11400 }
11401
11402 /* REL points to a low-part reloc on a largetoc instruction sequence.
11403 Find the matching high-part reloc instruction and verify that it
11404 is addis REG,r2,x. If so, return a pointer to the high-part reloc. */
11405
11406 static const Elf_Internal_Rela *
11407 ha_reloc_match (const Elf_Internal_Rela *relocs,
11408 const Elf_Internal_Rela *rel,
11409 unsigned int reg,
11410 const bfd *input_bfd,
11411 const bfd_byte *contents)
11412 {
11413 enum elf_ppc64_reloc_type r_type, r_type_ha;
11414 bfd_vma r_info_ha, r_addend;
11415
11416 r_type = ELF64_R_TYPE (rel->r_info);
11417 switch (r_type)
11418 {
11419 case R_PPC64_GOT_TLSLD16_LO:
11420 case R_PPC64_GOT_TLSGD16_LO:
11421 case R_PPC64_GOT_TPREL16_LO_DS:
11422 case R_PPC64_GOT_DTPREL16_LO_DS:
11423 case R_PPC64_GOT16_LO:
11424 case R_PPC64_TOC16_LO:
11425 r_type_ha = r_type + 2;
11426 break;
11427 case R_PPC64_GOT16_LO_DS:
11428 r_type_ha = R_PPC64_GOT16_HA;
11429 break;
11430 case R_PPC64_TOC16_LO_DS:
11431 r_type_ha = R_PPC64_TOC16_HA;
11432 break;
11433 default:
11434 abort ();
11435 }
11436 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11437 r_addend = rel->r_addend;
11438
11439 while (--rel >= relocs)
11440 if (rel->r_info == r_info_ha
11441 && rel->r_addend == r_addend)
11442 {
11443 const bfd_byte *p = contents + (rel->r_offset & ~3);
11444 unsigned int insn = bfd_get_32 (input_bfd, p);
11445 if ((insn & ((0x3f << 26) | (0x1f << 16)))
11446 == ((15u << 26) | (2 << 16)) /* addis rt,r2,x */
11447 && (insn & (0x1f << 21)) == (reg << 21))
11448 return rel;
11449 break;
11450 }
11451 return NULL;
11452 }
11453
11454 /* The RELOCATE_SECTION function is called by the ELF backend linker
11455 to handle the relocations for a section.
11456
11457 The relocs are always passed as Rela structures; if the section
11458 actually uses Rel structures, the r_addend field will always be
11459 zero.
11460
11461 This function is responsible for adjust the section contents as
11462 necessary, and (if using Rela relocs and generating a
11463 relocatable output file) adjusting the reloc addend as
11464 necessary.
11465
11466 This function does not have to worry about setting the reloc
11467 address or the reloc symbol index.
11468
11469 LOCAL_SYMS is a pointer to the swapped in local symbols.
11470
11471 LOCAL_SECTIONS is an array giving the section in the input file
11472 corresponding to the st_shndx field of each local symbol.
11473
11474 The global hash table entry for the global symbols can be found
11475 via elf_sym_hashes (input_bfd).
11476
11477 When generating relocatable output, this function must handle
11478 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11479 going to be the section symbol corresponding to the output
11480 section, which means that the addend must be adjusted
11481 accordingly. */
11482
11483 static bfd_boolean
11484 ppc64_elf_relocate_section (bfd *output_bfd,
11485 struct bfd_link_info *info,
11486 bfd *input_bfd,
11487 asection *input_section,
11488 bfd_byte *contents,
11489 Elf_Internal_Rela *relocs,
11490 Elf_Internal_Sym *local_syms,
11491 asection **local_sections)
11492 {
11493 struct ppc_link_hash_table *htab;
11494 Elf_Internal_Shdr *symtab_hdr;
11495 struct elf_link_hash_entry **sym_hashes;
11496 Elf_Internal_Rela *rel;
11497 Elf_Internal_Rela *relend;
11498 Elf_Internal_Rela outrel;
11499 bfd_byte *loc;
11500 struct got_entry **local_got_ents;
11501 bfd_vma TOCstart;
11502 bfd_boolean ret = TRUE;
11503 bfd_boolean is_opd;
11504 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11505 bfd_boolean is_power4 = FALSE;
11506 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11507
11508 /* Initialize howto table if needed. */
11509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11510 ppc_howto_init ();
11511
11512 htab = ppc_hash_table (info);
11513 if (htab == NULL)
11514 return FALSE;
11515
11516 /* Don't relocate stub sections. */
11517 if (input_section->owner == htab->stub_bfd)
11518 return TRUE;
11519
11520 BFD_ASSERT (is_ppc64_elf (input_bfd));
11521
11522 local_got_ents = elf_local_got_ents (input_bfd);
11523 TOCstart = elf_gp (output_bfd);
11524 symtab_hdr = &elf_symtab_hdr (input_bfd);
11525 sym_hashes = elf_sym_hashes (input_bfd);
11526 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11527
11528 rel = relocs;
11529 relend = relocs + input_section->reloc_count;
11530 for (; rel < relend; rel++)
11531 {
11532 enum elf_ppc64_reloc_type r_type;
11533 bfd_vma addend, orig_addend;
11534 bfd_reloc_status_type r;
11535 Elf_Internal_Sym *sym;
11536 asection *sec;
11537 struct elf_link_hash_entry *h_elf;
11538 struct ppc_link_hash_entry *h;
11539 struct ppc_link_hash_entry *fdh;
11540 const char *sym_name;
11541 unsigned long r_symndx, toc_symndx;
11542 bfd_vma toc_addend;
11543 unsigned char tls_mask, tls_gd, tls_type;
11544 unsigned char sym_type;
11545 bfd_vma relocation;
11546 bfd_boolean unresolved_reloc;
11547 bfd_boolean warned;
11548 unsigned int insn;
11549 bfd_vma mask;
11550 struct ppc_stub_hash_entry *stub_entry;
11551 bfd_vma max_br_offset;
11552 bfd_vma from;
11553
11554 r_type = ELF64_R_TYPE (rel->r_info);
11555 r_symndx = ELF64_R_SYM (rel->r_info);
11556
11557 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11558 symbol of the previous ADDR64 reloc. The symbol gives us the
11559 proper TOC base to use. */
11560 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11561 && rel != relocs
11562 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11563 && is_opd)
11564 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11565
11566 sym = NULL;
11567 sec = NULL;
11568 h_elf = NULL;
11569 sym_name = NULL;
11570 unresolved_reloc = FALSE;
11571 warned = FALSE;
11572 orig_addend = rel->r_addend;
11573
11574 if (r_symndx < symtab_hdr->sh_info)
11575 {
11576 /* It's a local symbol. */
11577 struct _opd_sec_data *opd;
11578
11579 sym = local_syms + r_symndx;
11580 sec = local_sections[r_symndx];
11581 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11582 sym_type = ELF64_ST_TYPE (sym->st_info);
11583 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11584 opd = get_opd_info (sec);
11585 if (opd != NULL && opd->adjust != NULL)
11586 {
11587 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11588 if (adjust == -1)
11589 relocation = 0;
11590 else
11591 {
11592 /* If this is a relocation against the opd section sym
11593 and we have edited .opd, adjust the reloc addend so
11594 that ld -r and ld --emit-relocs output is correct.
11595 If it is a reloc against some other .opd symbol,
11596 then the symbol value will be adjusted later. */
11597 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11598 rel->r_addend += adjust;
11599 else
11600 relocation += adjust;
11601 }
11602 }
11603 }
11604 else
11605 {
11606 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11607 r_symndx, symtab_hdr, sym_hashes,
11608 h_elf, sec, relocation,
11609 unresolved_reloc, warned);
11610 sym_name = h_elf->root.root.string;
11611 sym_type = h_elf->type;
11612 }
11613 h = (struct ppc_link_hash_entry *) h_elf;
11614
11615 if (sec != NULL && elf_discarded_section (sec))
11616 {
11617 /* For relocs against symbols from removed linkonce sections,
11618 or sections discarded by a linker script, we just want the
11619 section contents zeroed. Avoid any special processing. */
11620 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11621 contents + rel->r_offset);
11622 rel->r_info = 0;
11623 rel->r_addend = 0;
11624 continue;
11625 }
11626
11627 if (info->relocatable)
11628 continue;
11629
11630 /* TLS optimizations. Replace instruction sequences and relocs
11631 based on information we collected in tls_optimize. We edit
11632 RELOCS so that --emit-relocs will output something sensible
11633 for the final instruction stream. */
11634 tls_mask = 0;
11635 tls_gd = 0;
11636 toc_symndx = 0;
11637 if (h != NULL)
11638 tls_mask = h->tls_mask;
11639 else if (local_got_ents != NULL)
11640 {
11641 struct plt_entry **local_plt = (struct plt_entry **)
11642 (local_got_ents + symtab_hdr->sh_info);
11643 unsigned char *lgot_masks = (unsigned char *)
11644 (local_plt + symtab_hdr->sh_info);
11645 tls_mask = lgot_masks[r_symndx];
11646 }
11647 if (tls_mask == 0
11648 && (r_type == R_PPC64_TLS
11649 || r_type == R_PPC64_TLSGD
11650 || r_type == R_PPC64_TLSLD))
11651 {
11652 /* Check for toc tls entries. */
11653 unsigned char *toc_tls;
11654
11655 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11656 &local_syms, rel, input_bfd))
11657 return FALSE;
11658
11659 if (toc_tls)
11660 tls_mask = *toc_tls;
11661 }
11662
11663 /* Check that tls relocs are used with tls syms, and non-tls
11664 relocs are used with non-tls syms. */
11665 if (r_symndx != 0
11666 && r_type != R_PPC64_NONE
11667 && (h == NULL
11668 || h->elf.root.type == bfd_link_hash_defined
11669 || h->elf.root.type == bfd_link_hash_defweak)
11670 && (IS_PPC64_TLS_RELOC (r_type)
11671 != (sym_type == STT_TLS
11672 || (sym_type == STT_SECTION
11673 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11674 {
11675 if (tls_mask != 0
11676 && (r_type == R_PPC64_TLS
11677 || r_type == R_PPC64_TLSGD
11678 || r_type == R_PPC64_TLSLD))
11679 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11680 ;
11681 else
11682 (*_bfd_error_handler)
11683 (!IS_PPC64_TLS_RELOC (r_type)
11684 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11685 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11686 input_bfd,
11687 input_section,
11688 (long) rel->r_offset,
11689 ppc64_elf_howto_table[r_type]->name,
11690 sym_name);
11691 }
11692
11693 /* Ensure reloc mapping code below stays sane. */
11694 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11695 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11696 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11697 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11698 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11699 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11700 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11701 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11702 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11703 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11704 abort ();
11705
11706 switch (r_type)
11707 {
11708 default:
11709 break;
11710
11711 case R_PPC64_LO_DS_OPT:
11712 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11713 if ((insn & (0x3f << 26)) != 58u << 26)
11714 abort ();
11715 insn += (14u << 26) - (58u << 26);
11716 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11717 r_type = R_PPC64_TOC16_LO;
11718 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11719 break;
11720
11721 case R_PPC64_TOC16:
11722 case R_PPC64_TOC16_LO:
11723 case R_PPC64_TOC16_DS:
11724 case R_PPC64_TOC16_LO_DS:
11725 {
11726 /* Check for toc tls entries. */
11727 unsigned char *toc_tls;
11728 int retval;
11729
11730 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11731 &local_syms, rel, input_bfd);
11732 if (retval == 0)
11733 return FALSE;
11734
11735 if (toc_tls)
11736 {
11737 tls_mask = *toc_tls;
11738 if (r_type == R_PPC64_TOC16_DS
11739 || r_type == R_PPC64_TOC16_LO_DS)
11740 {
11741 if (tls_mask != 0
11742 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11743 goto toctprel;
11744 }
11745 else
11746 {
11747 /* If we found a GD reloc pair, then we might be
11748 doing a GD->IE transition. */
11749 if (retval == 2)
11750 {
11751 tls_gd = TLS_TPRELGD;
11752 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11753 goto tls_ldgd_opt;
11754 }
11755 else if (retval == 3)
11756 {
11757 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11758 goto tls_ldgd_opt;
11759 }
11760 }
11761 }
11762 }
11763 break;
11764
11765 case R_PPC64_GOT_TPREL16_HI:
11766 case R_PPC64_GOT_TPREL16_HA:
11767 if (tls_mask != 0
11768 && (tls_mask & TLS_TPREL) == 0)
11769 {
11770 rel->r_offset -= d_offset;
11771 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11772 r_type = R_PPC64_NONE;
11773 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11774 }
11775 break;
11776
11777 case R_PPC64_GOT_TPREL16_DS:
11778 case R_PPC64_GOT_TPREL16_LO_DS:
11779 if (tls_mask != 0
11780 && (tls_mask & TLS_TPREL) == 0)
11781 {
11782 toctprel:
11783 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11784 insn &= 31 << 21;
11785 insn |= 0x3c0d0000; /* addis 0,13,0 */
11786 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11787 r_type = R_PPC64_TPREL16_HA;
11788 if (toc_symndx != 0)
11789 {
11790 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11791 rel->r_addend = toc_addend;
11792 /* We changed the symbol. Start over in order to
11793 get h, sym, sec etc. right. */
11794 rel--;
11795 continue;
11796 }
11797 else
11798 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11799 }
11800 break;
11801
11802 case R_PPC64_TLS:
11803 if (tls_mask != 0
11804 && (tls_mask & TLS_TPREL) == 0)
11805 {
11806 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11807 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11808 if (insn == 0)
11809 abort ();
11810 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11811 /* Was PPC64_TLS which sits on insn boundary, now
11812 PPC64_TPREL16_LO which is at low-order half-word. */
11813 rel->r_offset += d_offset;
11814 r_type = R_PPC64_TPREL16_LO;
11815 if (toc_symndx != 0)
11816 {
11817 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11818 rel->r_addend = toc_addend;
11819 /* We changed the symbol. Start over in order to
11820 get h, sym, sec etc. right. */
11821 rel--;
11822 continue;
11823 }
11824 else
11825 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11826 }
11827 break;
11828
11829 case R_PPC64_GOT_TLSGD16_HI:
11830 case R_PPC64_GOT_TLSGD16_HA:
11831 tls_gd = TLS_TPRELGD;
11832 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11833 goto tls_gdld_hi;
11834 break;
11835
11836 case R_PPC64_GOT_TLSLD16_HI:
11837 case R_PPC64_GOT_TLSLD16_HA:
11838 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11839 {
11840 tls_gdld_hi:
11841 if ((tls_mask & tls_gd) != 0)
11842 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11843 + R_PPC64_GOT_TPREL16_DS);
11844 else
11845 {
11846 rel->r_offset -= d_offset;
11847 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11848 r_type = R_PPC64_NONE;
11849 }
11850 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11851 }
11852 break;
11853
11854 case R_PPC64_GOT_TLSGD16:
11855 case R_PPC64_GOT_TLSGD16_LO:
11856 tls_gd = TLS_TPRELGD;
11857 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11858 goto tls_ldgd_opt;
11859 break;
11860
11861 case R_PPC64_GOT_TLSLD16:
11862 case R_PPC64_GOT_TLSLD16_LO:
11863 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11864 {
11865 unsigned int insn1, insn2, insn3;
11866 bfd_vma offset;
11867
11868 tls_ldgd_opt:
11869 offset = (bfd_vma) -1;
11870 /* If not using the newer R_PPC64_TLSGD/LD to mark
11871 __tls_get_addr calls, we must trust that the call
11872 stays with its arg setup insns, ie. that the next
11873 reloc is the __tls_get_addr call associated with
11874 the current reloc. Edit both insns. */
11875 if (input_section->has_tls_get_addr_call
11876 && rel + 1 < relend
11877 && branch_reloc_hash_match (input_bfd, rel + 1,
11878 htab->tls_get_addr,
11879 htab->tls_get_addr_fd))
11880 offset = rel[1].r_offset;
11881 if ((tls_mask & tls_gd) != 0)
11882 {
11883 /* IE */
11884 insn1 = bfd_get_32 (output_bfd,
11885 contents + rel->r_offset - d_offset);
11886 insn1 &= (1 << 26) - (1 << 2);
11887 insn1 |= 58 << 26; /* ld */
11888 insn2 = 0x7c636a14; /* add 3,3,13 */
11889 if (offset != (bfd_vma) -1)
11890 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11891 if ((tls_mask & TLS_EXPLICIT) == 0)
11892 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11893 + R_PPC64_GOT_TPREL16_DS);
11894 else
11895 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11896 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11897 }
11898 else
11899 {
11900 /* LE */
11901 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11902 insn2 = 0x38630000; /* addi 3,3,0 */
11903 if (tls_gd == 0)
11904 {
11905 /* Was an LD reloc. */
11906 if (toc_symndx)
11907 sec = local_sections[toc_symndx];
11908 for (r_symndx = 0;
11909 r_symndx < symtab_hdr->sh_info;
11910 r_symndx++)
11911 if (local_sections[r_symndx] == sec)
11912 break;
11913 if (r_symndx >= symtab_hdr->sh_info)
11914 r_symndx = 0;
11915 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11916 if (r_symndx != 0)
11917 rel->r_addend -= (local_syms[r_symndx].st_value
11918 + sec->output_offset
11919 + sec->output_section->vma);
11920 }
11921 else if (toc_symndx != 0)
11922 {
11923 r_symndx = toc_symndx;
11924 rel->r_addend = toc_addend;
11925 }
11926 r_type = R_PPC64_TPREL16_HA;
11927 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11928 if (offset != (bfd_vma) -1)
11929 {
11930 rel[1].r_info = ELF64_R_INFO (r_symndx,
11931 R_PPC64_TPREL16_LO);
11932 rel[1].r_offset = offset + d_offset;
11933 rel[1].r_addend = rel->r_addend;
11934 }
11935 }
11936 bfd_put_32 (output_bfd, insn1,
11937 contents + rel->r_offset - d_offset);
11938 if (offset != (bfd_vma) -1)
11939 {
11940 insn3 = bfd_get_32 (output_bfd,
11941 contents + offset + 4);
11942 if (insn3 == NOP
11943 || insn3 == CROR_151515 || insn3 == CROR_313131)
11944 {
11945 rel[1].r_offset += 4;
11946 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11947 insn2 = NOP;
11948 }
11949 bfd_put_32 (output_bfd, insn2, contents + offset);
11950 }
11951 if ((tls_mask & tls_gd) == 0
11952 && (tls_gd == 0 || toc_symndx != 0))
11953 {
11954 /* We changed the symbol. Start over in order
11955 to get h, sym, sec etc. right. */
11956 rel--;
11957 continue;
11958 }
11959 }
11960 break;
11961
11962 case R_PPC64_TLSGD:
11963 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11964 {
11965 unsigned int insn2, insn3;
11966 bfd_vma offset = rel->r_offset;
11967
11968 if ((tls_mask & TLS_TPRELGD) != 0)
11969 {
11970 /* IE */
11971 r_type = R_PPC64_NONE;
11972 insn2 = 0x7c636a14; /* add 3,3,13 */
11973 }
11974 else
11975 {
11976 /* LE */
11977 if (toc_symndx != 0)
11978 {
11979 r_symndx = toc_symndx;
11980 rel->r_addend = toc_addend;
11981 }
11982 r_type = R_PPC64_TPREL16_LO;
11983 rel->r_offset = offset + d_offset;
11984 insn2 = 0x38630000; /* addi 3,3,0 */
11985 }
11986 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11987 /* Zap the reloc on the _tls_get_addr call too. */
11988 BFD_ASSERT (offset == rel[1].r_offset);
11989 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11990 insn3 = bfd_get_32 (output_bfd,
11991 contents + offset + 4);
11992 if (insn3 == NOP
11993 || insn3 == CROR_151515 || insn3 == CROR_313131)
11994 {
11995 rel->r_offset += 4;
11996 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11997 insn2 = NOP;
11998 }
11999 bfd_put_32 (output_bfd, insn2, contents + offset);
12000 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12001 {
12002 rel--;
12003 continue;
12004 }
12005 }
12006 break;
12007
12008 case R_PPC64_TLSLD:
12009 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12010 {
12011 unsigned int insn2, insn3;
12012 bfd_vma offset = rel->r_offset;
12013
12014 if (toc_symndx)
12015 sec = local_sections[toc_symndx];
12016 for (r_symndx = 0;
12017 r_symndx < symtab_hdr->sh_info;
12018 r_symndx++)
12019 if (local_sections[r_symndx] == sec)
12020 break;
12021 if (r_symndx >= symtab_hdr->sh_info)
12022 r_symndx = 0;
12023 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12024 if (r_symndx != 0)
12025 rel->r_addend -= (local_syms[r_symndx].st_value
12026 + sec->output_offset
12027 + sec->output_section->vma);
12028
12029 r_type = R_PPC64_TPREL16_LO;
12030 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12031 rel->r_offset = offset + d_offset;
12032 /* Zap the reloc on the _tls_get_addr call too. */
12033 BFD_ASSERT (offset == rel[1].r_offset);
12034 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12035 insn2 = 0x38630000; /* addi 3,3,0 */
12036 insn3 = bfd_get_32 (output_bfd,
12037 contents + offset + 4);
12038 if (insn3 == NOP
12039 || insn3 == CROR_151515 || insn3 == CROR_313131)
12040 {
12041 rel->r_offset += 4;
12042 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12043 insn2 = NOP;
12044 }
12045 bfd_put_32 (output_bfd, insn2, contents + offset);
12046 rel--;
12047 continue;
12048 }
12049 break;
12050
12051 case R_PPC64_DTPMOD64:
12052 if (rel + 1 < relend
12053 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12054 && rel[1].r_offset == rel->r_offset + 8)
12055 {
12056 if ((tls_mask & TLS_GD) == 0)
12057 {
12058 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12059 if ((tls_mask & TLS_TPRELGD) != 0)
12060 r_type = R_PPC64_TPREL64;
12061 else
12062 {
12063 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12064 r_type = R_PPC64_NONE;
12065 }
12066 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12067 }
12068 }
12069 else
12070 {
12071 if ((tls_mask & TLS_LD) == 0)
12072 {
12073 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12074 r_type = R_PPC64_NONE;
12075 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12076 }
12077 }
12078 break;
12079
12080 case R_PPC64_TPREL64:
12081 if ((tls_mask & TLS_TPREL) == 0)
12082 {
12083 r_type = R_PPC64_NONE;
12084 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12085 }
12086 break;
12087 }
12088
12089 /* Handle other relocations that tweak non-addend part of insn. */
12090 insn = 0;
12091 max_br_offset = 1 << 25;
12092 addend = rel->r_addend;
12093 switch (r_type)
12094 {
12095 default:
12096 break;
12097
12098 /* Branch taken prediction relocations. */
12099 case R_PPC64_ADDR14_BRTAKEN:
12100 case R_PPC64_REL14_BRTAKEN:
12101 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12102 /* Fall thru. */
12103
12104 /* Branch not taken prediction relocations. */
12105 case R_PPC64_ADDR14_BRNTAKEN:
12106 case R_PPC64_REL14_BRNTAKEN:
12107 insn |= bfd_get_32 (output_bfd,
12108 contents + rel->r_offset) & ~(0x01 << 21);
12109 /* Fall thru. */
12110
12111 case R_PPC64_REL14:
12112 max_br_offset = 1 << 15;
12113 /* Fall thru. */
12114
12115 case R_PPC64_REL24:
12116 /* Calls to functions with a different TOC, such as calls to
12117 shared objects, need to alter the TOC pointer. This is
12118 done using a linkage stub. A REL24 branching to these
12119 linkage stubs needs to be followed by a nop, as the nop
12120 will be replaced with an instruction to restore the TOC
12121 base pointer. */
12122 fdh = h;
12123 if (h != NULL
12124 && h->oh != NULL
12125 && h->oh->is_func_descriptor)
12126 fdh = ppc_follow_link (h->oh);
12127 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12128 if (stub_entry != NULL
12129 && (stub_entry->stub_type == ppc_stub_plt_call
12130 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12131 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12132 {
12133 bfd_boolean can_plt_call = FALSE;
12134
12135 if (rel->r_offset + 8 <= input_section->size)
12136 {
12137 unsigned long nop;
12138 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12139 if (nop == NOP
12140 || nop == CROR_151515 || nop == CROR_313131)
12141 {
12142 if (h != NULL
12143 && (h == htab->tls_get_addr_fd
12144 || h == htab->tls_get_addr)
12145 && !htab->no_tls_get_addr_opt)
12146 {
12147 /* Special stub used, leave nop alone. */
12148 }
12149 else
12150 bfd_put_32 (input_bfd, LD_R2_40R1,
12151 contents + rel->r_offset + 4);
12152 can_plt_call = TRUE;
12153 }
12154 }
12155
12156 if (!can_plt_call)
12157 {
12158 if (stub_entry->stub_type == ppc_stub_plt_call)
12159 {
12160 /* If this is a plain branch rather than a branch
12161 and link, don't require a nop. However, don't
12162 allow tail calls in a shared library as they
12163 will result in r2 being corrupted. */
12164 unsigned long br;
12165 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12166 if (info->executable && (br & 1) == 0)
12167 can_plt_call = TRUE;
12168 else
12169 stub_entry = NULL;
12170 }
12171 else if (h != NULL
12172 && strcmp (h->elf.root.root.string,
12173 ".__libc_start_main") == 0)
12174 {
12175 /* Allow crt1 branch to go via a toc adjusting stub. */
12176 can_plt_call = TRUE;
12177 }
12178 else
12179 {
12180 if (strcmp (input_section->output_section->name,
12181 ".init") == 0
12182 || strcmp (input_section->output_section->name,
12183 ".fini") == 0)
12184 (*_bfd_error_handler)
12185 (_("%B(%A+0x%lx): automatic multiple TOCs "
12186 "not supported using your crt files; "
12187 "recompile with -mminimal-toc or upgrade gcc"),
12188 input_bfd,
12189 input_section,
12190 (long) rel->r_offset);
12191 else
12192 (*_bfd_error_handler)
12193 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12194 "does not allow automatic multiple TOCs; "
12195 "recompile with -mminimal-toc or "
12196 "-fno-optimize-sibling-calls, "
12197 "or make `%s' extern"),
12198 input_bfd,
12199 input_section,
12200 (long) rel->r_offset,
12201 sym_name,
12202 sym_name);
12203 bfd_set_error (bfd_error_bad_value);
12204 ret = FALSE;
12205 }
12206 }
12207
12208 if (can_plt_call
12209 && stub_entry->stub_type == ppc_stub_plt_call)
12210 unresolved_reloc = FALSE;
12211 }
12212
12213 if ((stub_entry == NULL
12214 || stub_entry->stub_type == ppc_stub_long_branch
12215 || stub_entry->stub_type == ppc_stub_plt_branch)
12216 && get_opd_info (sec) != NULL)
12217 {
12218 /* The branch destination is the value of the opd entry. */
12219 bfd_vma off = (relocation + addend
12220 - sec->output_section->vma
12221 - sec->output_offset);
12222 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12223 if (dest != (bfd_vma) -1)
12224 {
12225 relocation = dest;
12226 addend = 0;
12227 }
12228 }
12229
12230 /* If the branch is out of reach we ought to have a long
12231 branch stub. */
12232 from = (rel->r_offset
12233 + input_section->output_offset
12234 + input_section->output_section->vma);
12235
12236 if (stub_entry != NULL
12237 && (stub_entry->stub_type == ppc_stub_long_branch
12238 || stub_entry->stub_type == ppc_stub_plt_branch)
12239 && (r_type == R_PPC64_ADDR14_BRTAKEN
12240 || r_type == R_PPC64_ADDR14_BRNTAKEN
12241 || (relocation + addend - from + max_br_offset
12242 < 2 * max_br_offset)))
12243 /* Don't use the stub if this branch is in range. */
12244 stub_entry = NULL;
12245
12246 if (stub_entry != NULL)
12247 {
12248 /* Munge up the value and addend so that we call the stub
12249 rather than the procedure directly. */
12250 relocation = (stub_entry->stub_offset
12251 + stub_entry->stub_sec->output_offset
12252 + stub_entry->stub_sec->output_section->vma);
12253 addend = 0;
12254 }
12255
12256 if (insn != 0)
12257 {
12258 if (is_power4)
12259 {
12260 /* Set 'a' bit. This is 0b00010 in BO field for branch
12261 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12262 for branch on CTR insns (BO == 1a00t or 1a01t). */
12263 if ((insn & (0x14 << 21)) == (0x04 << 21))
12264 insn |= 0x02 << 21;
12265 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12266 insn |= 0x08 << 21;
12267 else
12268 break;
12269 }
12270 else
12271 {
12272 /* Invert 'y' bit if not the default. */
12273 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12274 insn ^= 0x01 << 21;
12275 }
12276
12277 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12278 }
12279
12280 /* NOP out calls to undefined weak functions.
12281 We can thus call a weak function without first
12282 checking whether the function is defined. */
12283 else if (h != NULL
12284 && h->elf.root.type == bfd_link_hash_undefweak
12285 && h->elf.dynindx == -1
12286 && r_type == R_PPC64_REL24
12287 && relocation == 0
12288 && addend == 0)
12289 {
12290 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12291 continue;
12292 }
12293 break;
12294 }
12295
12296 /* Set `addend'. */
12297 tls_type = 0;
12298 switch (r_type)
12299 {
12300 default:
12301 (*_bfd_error_handler)
12302 (_("%B: unknown relocation type %d for symbol %s"),
12303 input_bfd, (int) r_type, sym_name);
12304
12305 bfd_set_error (bfd_error_bad_value);
12306 ret = FALSE;
12307 continue;
12308
12309 case R_PPC64_NONE:
12310 case R_PPC64_TLS:
12311 case R_PPC64_TLSGD:
12312 case R_PPC64_TLSLD:
12313 case R_PPC64_GNU_VTINHERIT:
12314 case R_PPC64_GNU_VTENTRY:
12315 continue;
12316
12317 /* GOT16 relocations. Like an ADDR16 using the symbol's
12318 address in the GOT as relocation value instead of the
12319 symbol's value itself. Also, create a GOT entry for the
12320 symbol and put the symbol value there. */
12321 case R_PPC64_GOT_TLSGD16:
12322 case R_PPC64_GOT_TLSGD16_LO:
12323 case R_PPC64_GOT_TLSGD16_HI:
12324 case R_PPC64_GOT_TLSGD16_HA:
12325 tls_type = TLS_TLS | TLS_GD;
12326 goto dogot;
12327
12328 case R_PPC64_GOT_TLSLD16:
12329 case R_PPC64_GOT_TLSLD16_LO:
12330 case R_PPC64_GOT_TLSLD16_HI:
12331 case R_PPC64_GOT_TLSLD16_HA:
12332 tls_type = TLS_TLS | TLS_LD;
12333 goto dogot;
12334
12335 case R_PPC64_GOT_TPREL16_DS:
12336 case R_PPC64_GOT_TPREL16_LO_DS:
12337 case R_PPC64_GOT_TPREL16_HI:
12338 case R_PPC64_GOT_TPREL16_HA:
12339 tls_type = TLS_TLS | TLS_TPREL;
12340 goto dogot;
12341
12342 case R_PPC64_GOT_DTPREL16_DS:
12343 case R_PPC64_GOT_DTPREL16_LO_DS:
12344 case R_PPC64_GOT_DTPREL16_HI:
12345 case R_PPC64_GOT_DTPREL16_HA:
12346 tls_type = TLS_TLS | TLS_DTPREL;
12347 goto dogot;
12348
12349 case R_PPC64_GOT16:
12350 case R_PPC64_GOT16_LO:
12351 case R_PPC64_GOT16_HI:
12352 case R_PPC64_GOT16_HA:
12353 case R_PPC64_GOT16_DS:
12354 case R_PPC64_GOT16_LO_DS:
12355 dogot:
12356 {
12357 /* Relocation is to the entry for this symbol in the global
12358 offset table. */
12359 asection *got;
12360 bfd_vma *offp;
12361 bfd_vma off;
12362 unsigned long indx = 0;
12363 struct got_entry *ent;
12364
12365 if (tls_type == (TLS_TLS | TLS_LD)
12366 && (h == NULL
12367 || !h->elf.def_dynamic))
12368 ent = ppc64_tlsld_got (input_bfd);
12369 else
12370 {
12371
12372 if (h != NULL)
12373 {
12374 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12375 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12376 &h->elf)
12377 || (info->shared
12378 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12379 /* This is actually a static link, or it is a
12380 -Bsymbolic link and the symbol is defined
12381 locally, or the symbol was forced to be local
12382 because of a version file. */
12383 ;
12384 else
12385 {
12386 indx = h->elf.dynindx;
12387 unresolved_reloc = FALSE;
12388 }
12389 ent = h->elf.got.glist;
12390 }
12391 else
12392 {
12393 if (local_got_ents == NULL)
12394 abort ();
12395 ent = local_got_ents[r_symndx];
12396 }
12397
12398 for (; ent != NULL; ent = ent->next)
12399 if (ent->addend == orig_addend
12400 && ent->owner == input_bfd
12401 && ent->tls_type == tls_type)
12402 break;
12403 }
12404
12405 if (ent == NULL)
12406 abort ();
12407 if (ent->is_indirect)
12408 ent = ent->got.ent;
12409 offp = &ent->got.offset;
12410 got = ppc64_elf_tdata (ent->owner)->got;
12411 if (got == NULL)
12412 abort ();
12413
12414 /* The offset must always be a multiple of 8. We use the
12415 least significant bit to record whether we have already
12416 processed this entry. */
12417 off = *offp;
12418 if ((off & 1) != 0)
12419 off &= ~1;
12420 else
12421 {
12422 /* Generate relocs for the dynamic linker, except in
12423 the case of TLSLD where we'll use one entry per
12424 module. */
12425 asection *relgot;
12426 bfd_boolean ifunc;
12427
12428 *offp = off | 1;
12429 relgot = NULL;
12430 ifunc = (h != NULL
12431 ? h->elf.type == STT_GNU_IFUNC
12432 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12433 if ((info->shared || indx != 0)
12434 && (h == NULL
12435 || (tls_type == (TLS_TLS | TLS_LD)
12436 && !h->elf.def_dynamic)
12437 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12438 || h->elf.root.type != bfd_link_hash_undefweak))
12439 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12440 else if (ifunc)
12441 relgot = htab->reliplt;
12442 if (relgot != NULL)
12443 {
12444 outrel.r_offset = (got->output_section->vma
12445 + got->output_offset
12446 + off);
12447 outrel.r_addend = addend;
12448 if (tls_type & (TLS_LD | TLS_GD))
12449 {
12450 outrel.r_addend = 0;
12451 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12452 if (tls_type == (TLS_TLS | TLS_GD))
12453 {
12454 loc = relgot->contents;
12455 loc += (relgot->reloc_count++
12456 * sizeof (Elf64_External_Rela));
12457 bfd_elf64_swap_reloca_out (output_bfd,
12458 &outrel, loc);
12459 outrel.r_offset += 8;
12460 outrel.r_addend = addend;
12461 outrel.r_info
12462 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12463 }
12464 }
12465 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12466 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12467 else if (tls_type == (TLS_TLS | TLS_TPREL))
12468 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12469 else if (indx != 0)
12470 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12471 else
12472 {
12473 if (ifunc)
12474 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12475 else
12476 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12477
12478 /* Write the .got section contents for the sake
12479 of prelink. */
12480 loc = got->contents + off;
12481 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12482 loc);
12483 }
12484
12485 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12486 {
12487 outrel.r_addend += relocation;
12488 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12489 outrel.r_addend -= htab->elf.tls_sec->vma;
12490 }
12491 loc = relgot->contents;
12492 loc += (relgot->reloc_count++
12493 * sizeof (Elf64_External_Rela));
12494 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12495 }
12496
12497 /* Init the .got section contents here if we're not
12498 emitting a reloc. */
12499 else
12500 {
12501 relocation += addend;
12502 if (tls_type == (TLS_TLS | TLS_LD))
12503 relocation = 1;
12504 else if (tls_type != 0)
12505 {
12506 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12507 if (tls_type == (TLS_TLS | TLS_TPREL))
12508 relocation += DTP_OFFSET - TP_OFFSET;
12509
12510 if (tls_type == (TLS_TLS | TLS_GD))
12511 {
12512 bfd_put_64 (output_bfd, relocation,
12513 got->contents + off + 8);
12514 relocation = 1;
12515 }
12516 }
12517
12518 bfd_put_64 (output_bfd, relocation,
12519 got->contents + off);
12520 }
12521 }
12522
12523 if (off >= (bfd_vma) -2)
12524 abort ();
12525
12526 relocation = got->output_section->vma + got->output_offset + off;
12527 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12528 }
12529 break;
12530
12531 case R_PPC64_PLT16_HA:
12532 case R_PPC64_PLT16_HI:
12533 case R_PPC64_PLT16_LO:
12534 case R_PPC64_PLT32:
12535 case R_PPC64_PLT64:
12536 /* Relocation is to the entry for this symbol in the
12537 procedure linkage table. */
12538
12539 /* Resolve a PLT reloc against a local symbol directly,
12540 without using the procedure linkage table. */
12541 if (h == NULL)
12542 break;
12543
12544 /* It's possible that we didn't make a PLT entry for this
12545 symbol. This happens when statically linking PIC code,
12546 or when using -Bsymbolic. Go find a match if there is a
12547 PLT entry. */
12548 if (htab->plt != NULL)
12549 {
12550 struct plt_entry *ent;
12551 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12552 if (ent->addend == orig_addend
12553 && ent->plt.offset != (bfd_vma) -1)
12554 {
12555 relocation = (htab->plt->output_section->vma
12556 + htab->plt->output_offset
12557 + ent->plt.offset);
12558 unresolved_reloc = FALSE;
12559 }
12560 }
12561 break;
12562
12563 case R_PPC64_TOC:
12564 /* Relocation value is TOC base. */
12565 relocation = TOCstart;
12566 if (r_symndx == 0)
12567 relocation += htab->stub_group[input_section->id].toc_off;
12568 else if (unresolved_reloc)
12569 ;
12570 else if (sec != NULL && sec->id <= htab->top_id)
12571 relocation += htab->stub_group[sec->id].toc_off;
12572 else
12573 unresolved_reloc = TRUE;
12574 goto dodyn;
12575
12576 /* TOC16 relocs. We want the offset relative to the TOC base,
12577 which is the address of the start of the TOC plus 0x8000.
12578 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12579 in this order. */
12580 case R_PPC64_TOC16:
12581 case R_PPC64_TOC16_LO:
12582 case R_PPC64_TOC16_HI:
12583 case R_PPC64_TOC16_DS:
12584 case R_PPC64_TOC16_LO_DS:
12585 case R_PPC64_TOC16_HA:
12586 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12587 break;
12588
12589 /* Relocate against the beginning of the section. */
12590 case R_PPC64_SECTOFF:
12591 case R_PPC64_SECTOFF_LO:
12592 case R_PPC64_SECTOFF_HI:
12593 case R_PPC64_SECTOFF_DS:
12594 case R_PPC64_SECTOFF_LO_DS:
12595 case R_PPC64_SECTOFF_HA:
12596 if (sec != NULL)
12597 addend -= sec->output_section->vma;
12598 break;
12599
12600 case R_PPC64_REL16:
12601 case R_PPC64_REL16_LO:
12602 case R_PPC64_REL16_HI:
12603 case R_PPC64_REL16_HA:
12604 break;
12605
12606 case R_PPC64_REL14:
12607 case R_PPC64_REL14_BRNTAKEN:
12608 case R_PPC64_REL14_BRTAKEN:
12609 case R_PPC64_REL24:
12610 break;
12611
12612 case R_PPC64_TPREL16:
12613 case R_PPC64_TPREL16_LO:
12614 case R_PPC64_TPREL16_HI:
12615 case R_PPC64_TPREL16_HA:
12616 case R_PPC64_TPREL16_DS:
12617 case R_PPC64_TPREL16_LO_DS:
12618 case R_PPC64_TPREL16_HIGHER:
12619 case R_PPC64_TPREL16_HIGHERA:
12620 case R_PPC64_TPREL16_HIGHEST:
12621 case R_PPC64_TPREL16_HIGHESTA:
12622 if (h != NULL
12623 && h->elf.root.type == bfd_link_hash_undefweak
12624 && h->elf.dynindx == -1)
12625 {
12626 /* Make this relocation against an undefined weak symbol
12627 resolve to zero. This is really just a tweak, since
12628 code using weak externs ought to check that they are
12629 defined before using them. */
12630 bfd_byte *p = contents + rel->r_offset - d_offset;
12631
12632 insn = bfd_get_32 (output_bfd, p);
12633 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12634 if (insn != 0)
12635 bfd_put_32 (output_bfd, insn, p);
12636 break;
12637 }
12638 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12639 if (info->shared)
12640 /* The TPREL16 relocs shouldn't really be used in shared
12641 libs as they will result in DT_TEXTREL being set, but
12642 support them anyway. */
12643 goto dodyn;
12644 break;
12645
12646 case R_PPC64_DTPREL16:
12647 case R_PPC64_DTPREL16_LO:
12648 case R_PPC64_DTPREL16_HI:
12649 case R_PPC64_DTPREL16_HA:
12650 case R_PPC64_DTPREL16_DS:
12651 case R_PPC64_DTPREL16_LO_DS:
12652 case R_PPC64_DTPREL16_HIGHER:
12653 case R_PPC64_DTPREL16_HIGHERA:
12654 case R_PPC64_DTPREL16_HIGHEST:
12655 case R_PPC64_DTPREL16_HIGHESTA:
12656 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12657 break;
12658
12659 case R_PPC64_DTPMOD64:
12660 relocation = 1;
12661 addend = 0;
12662 goto dodyn;
12663
12664 case R_PPC64_TPREL64:
12665 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12666 goto dodyn;
12667
12668 case R_PPC64_DTPREL64:
12669 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12670 /* Fall thru */
12671
12672 /* Relocations that may need to be propagated if this is a
12673 dynamic object. */
12674 case R_PPC64_REL30:
12675 case R_PPC64_REL32:
12676 case R_PPC64_REL64:
12677 case R_PPC64_ADDR14:
12678 case R_PPC64_ADDR14_BRNTAKEN:
12679 case R_PPC64_ADDR14_BRTAKEN:
12680 case R_PPC64_ADDR16:
12681 case R_PPC64_ADDR16_DS:
12682 case R_PPC64_ADDR16_HA:
12683 case R_PPC64_ADDR16_HI:
12684 case R_PPC64_ADDR16_HIGHER:
12685 case R_PPC64_ADDR16_HIGHERA:
12686 case R_PPC64_ADDR16_HIGHEST:
12687 case R_PPC64_ADDR16_HIGHESTA:
12688 case R_PPC64_ADDR16_LO:
12689 case R_PPC64_ADDR16_LO_DS:
12690 case R_PPC64_ADDR24:
12691 case R_PPC64_ADDR32:
12692 case R_PPC64_ADDR64:
12693 case R_PPC64_UADDR16:
12694 case R_PPC64_UADDR32:
12695 case R_PPC64_UADDR64:
12696 dodyn:
12697 if ((input_section->flags & SEC_ALLOC) == 0)
12698 break;
12699
12700 if (NO_OPD_RELOCS && is_opd)
12701 break;
12702
12703 if ((info->shared
12704 && (h == NULL
12705 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12706 || h->elf.root.type != bfd_link_hash_undefweak)
12707 && (must_be_dyn_reloc (info, r_type)
12708 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12709 || (ELIMINATE_COPY_RELOCS
12710 && !info->shared
12711 && h != NULL
12712 && h->elf.dynindx != -1
12713 && !h->elf.non_got_ref
12714 && !h->elf.def_regular)
12715 || (!info->shared
12716 && (h != NULL
12717 ? h->elf.type == STT_GNU_IFUNC
12718 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12719 {
12720 bfd_boolean skip, relocate;
12721 asection *sreloc;
12722 bfd_vma out_off;
12723
12724 /* When generating a dynamic object, these relocations
12725 are copied into the output file to be resolved at run
12726 time. */
12727
12728 skip = FALSE;
12729 relocate = FALSE;
12730
12731 out_off = _bfd_elf_section_offset (output_bfd, info,
12732 input_section, rel->r_offset);
12733 if (out_off == (bfd_vma) -1)
12734 skip = TRUE;
12735 else if (out_off == (bfd_vma) -2)
12736 skip = TRUE, relocate = TRUE;
12737 out_off += (input_section->output_section->vma
12738 + input_section->output_offset);
12739 outrel.r_offset = out_off;
12740 outrel.r_addend = rel->r_addend;
12741
12742 /* Optimize unaligned reloc use. */
12743 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12744 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12745 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12746 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12747 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12748 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12749 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12750 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12751 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12752
12753 if (skip)
12754 memset (&outrel, 0, sizeof outrel);
12755 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12756 && !is_opd
12757 && r_type != R_PPC64_TOC)
12758 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12759 else
12760 {
12761 /* This symbol is local, or marked to become local,
12762 or this is an opd section reloc which must point
12763 at a local function. */
12764 outrel.r_addend += relocation;
12765 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12766 {
12767 if (is_opd && h != NULL)
12768 {
12769 /* Lie about opd entries. This case occurs
12770 when building shared libraries and we
12771 reference a function in another shared
12772 lib. The same thing happens for a weak
12773 definition in an application that's
12774 overridden by a strong definition in a
12775 shared lib. (I believe this is a generic
12776 bug in binutils handling of weak syms.)
12777 In these cases we won't use the opd
12778 entry in this lib. */
12779 unresolved_reloc = FALSE;
12780 }
12781 if (!is_opd
12782 && r_type == R_PPC64_ADDR64
12783 && (h != NULL
12784 ? h->elf.type == STT_GNU_IFUNC
12785 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12786 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12787 else
12788 {
12789 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12790
12791 /* We need to relocate .opd contents for ld.so.
12792 Prelink also wants simple and consistent rules
12793 for relocs. This make all RELATIVE relocs have
12794 *r_offset equal to r_addend. */
12795 relocate = TRUE;
12796 }
12797 }
12798 else
12799 {
12800 long indx = 0;
12801
12802 if (h != NULL
12803 ? h->elf.type == STT_GNU_IFUNC
12804 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12805 {
12806 (*_bfd_error_handler)
12807 (_("%B(%A+0x%lx): relocation %s for indirect "
12808 "function %s unsupported"),
12809 input_bfd,
12810 input_section,
12811 (long) rel->r_offset,
12812 ppc64_elf_howto_table[r_type]->name,
12813 sym_name);
12814 ret = FALSE;
12815 }
12816 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12817 ;
12818 else if (sec == NULL || sec->owner == NULL)
12819 {
12820 bfd_set_error (bfd_error_bad_value);
12821 return FALSE;
12822 }
12823 else
12824 {
12825 asection *osec;
12826
12827 osec = sec->output_section;
12828 indx = elf_section_data (osec)->dynindx;
12829
12830 if (indx == 0)
12831 {
12832 if ((osec->flags & SEC_READONLY) == 0
12833 && htab->elf.data_index_section != NULL)
12834 osec = htab->elf.data_index_section;
12835 else
12836 osec = htab->elf.text_index_section;
12837 indx = elf_section_data (osec)->dynindx;
12838 }
12839 BFD_ASSERT (indx != 0);
12840
12841 /* We are turning this relocation into one
12842 against a section symbol, so subtract out
12843 the output section's address but not the
12844 offset of the input section in the output
12845 section. */
12846 outrel.r_addend -= osec->vma;
12847 }
12848
12849 outrel.r_info = ELF64_R_INFO (indx, r_type);
12850 }
12851 }
12852
12853 sreloc = elf_section_data (input_section)->sreloc;
12854 if (!htab->elf.dynamic_sections_created)
12855 sreloc = htab->reliplt;
12856 if (sreloc == NULL)
12857 abort ();
12858
12859 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12860 >= sreloc->size)
12861 abort ();
12862 loc = sreloc->contents;
12863 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12864 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12865
12866 /* If this reloc is against an external symbol, it will
12867 be computed at runtime, so there's no need to do
12868 anything now. However, for the sake of prelink ensure
12869 that the section contents are a known value. */
12870 if (! relocate)
12871 {
12872 unresolved_reloc = FALSE;
12873 /* The value chosen here is quite arbitrary as ld.so
12874 ignores section contents except for the special
12875 case of .opd where the contents might be accessed
12876 before relocation. Choose zero, as that won't
12877 cause reloc overflow. */
12878 relocation = 0;
12879 addend = 0;
12880 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12881 to improve backward compatibility with older
12882 versions of ld. */
12883 if (r_type == R_PPC64_ADDR64)
12884 addend = outrel.r_addend;
12885 /* Adjust pc_relative relocs to have zero in *r_offset. */
12886 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12887 addend = (input_section->output_section->vma
12888 + input_section->output_offset
12889 + rel->r_offset);
12890 }
12891 }
12892 break;
12893
12894 case R_PPC64_COPY:
12895 case R_PPC64_GLOB_DAT:
12896 case R_PPC64_JMP_SLOT:
12897 case R_PPC64_JMP_IREL:
12898 case R_PPC64_RELATIVE:
12899 /* We shouldn't ever see these dynamic relocs in relocatable
12900 files. */
12901 /* Fall through. */
12902
12903 case R_PPC64_PLTGOT16:
12904 case R_PPC64_PLTGOT16_DS:
12905 case R_PPC64_PLTGOT16_HA:
12906 case R_PPC64_PLTGOT16_HI:
12907 case R_PPC64_PLTGOT16_LO:
12908 case R_PPC64_PLTGOT16_LO_DS:
12909 case R_PPC64_PLTREL32:
12910 case R_PPC64_PLTREL64:
12911 /* These ones haven't been implemented yet. */
12912
12913 (*_bfd_error_handler)
12914 (_("%B: relocation %s is not supported for symbol %s."),
12915 input_bfd,
12916 ppc64_elf_howto_table[r_type]->name, sym_name);
12917
12918 bfd_set_error (bfd_error_invalid_operation);
12919 ret = FALSE;
12920 continue;
12921 }
12922
12923 /* Multi-instruction sequences that access the TOC can be
12924 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12925 to nop; addi rb,r2,x; */
12926 switch (r_type)
12927 {
12928 default:
12929 break;
12930
12931 case R_PPC64_GOT_TLSLD16_HI:
12932 case R_PPC64_GOT_TLSGD16_HI:
12933 case R_PPC64_GOT_TPREL16_HI:
12934 case R_PPC64_GOT_DTPREL16_HI:
12935 case R_PPC64_GOT16_HI:
12936 case R_PPC64_TOC16_HI:
12937 /* These relocs would only be useful if building up an
12938 offset to later add to r2, perhaps in an indexed
12939 addressing mode instruction. Don't try to optimize.
12940 Unfortunately, the possibility of someone building up an
12941 offset like this or even with the HA relocs, means that
12942 we need to check the high insn when optimizing the low
12943 insn. */
12944 break;
12945
12946 case R_PPC64_GOT_TLSLD16_HA:
12947 case R_PPC64_GOT_TLSGD16_HA:
12948 case R_PPC64_GOT_TPREL16_HA:
12949 case R_PPC64_GOT_DTPREL16_HA:
12950 case R_PPC64_GOT16_HA:
12951 case R_PPC64_TOC16_HA:
12952 /* For now we don't nop out the first instruction. */
12953 break;
12954
12955 case R_PPC64_GOT_TLSLD16_LO:
12956 case R_PPC64_GOT_TLSGD16_LO:
12957 case R_PPC64_GOT_TPREL16_LO_DS:
12958 case R_PPC64_GOT_DTPREL16_LO_DS:
12959 case R_PPC64_GOT16_LO:
12960 case R_PPC64_GOT16_LO_DS:
12961 case R_PPC64_TOC16_LO:
12962 case R_PPC64_TOC16_LO_DS:
12963 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12964 {
12965 bfd_byte *p = contents + (rel->r_offset & ~3);
12966 insn = bfd_get_32 (input_bfd, p);
12967 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12968 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
12969 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
12970 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
12971 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
12972 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
12973 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
12974 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
12975 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
12976 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
12977 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
12978 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
12979 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
12980 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
12981 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
12982 && (insn & 3) != 1)
12983 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
12984 && ((insn & 3) == 0 || (insn & 3) == 3)))
12985 {
12986 unsigned int reg = (insn >> 16) & 0x1f;
12987 if (ha_reloc_match (relocs, rel, reg, input_bfd, contents))
12988 {
12989 insn &= ~(0x1f << 16);
12990 insn |= 2 << 16;
12991 bfd_put_32 (input_bfd, insn, p);
12992 }
12993 }
12994 }
12995 break;
12996 }
12997
12998 /* Do any further special processing. */
12999 switch (r_type)
13000 {
13001 default:
13002 break;
13003
13004 case R_PPC64_ADDR16_HA:
13005 case R_PPC64_REL16_HA:
13006 case R_PPC64_ADDR16_HIGHERA:
13007 case R_PPC64_ADDR16_HIGHESTA:
13008 case R_PPC64_TOC16_HA:
13009 case R_PPC64_SECTOFF_HA:
13010 case R_PPC64_TPREL16_HA:
13011 case R_PPC64_DTPREL16_HA:
13012 case R_PPC64_TPREL16_HIGHER:
13013 case R_PPC64_TPREL16_HIGHERA:
13014 case R_PPC64_TPREL16_HIGHEST:
13015 case R_PPC64_TPREL16_HIGHESTA:
13016 case R_PPC64_DTPREL16_HIGHER:
13017 case R_PPC64_DTPREL16_HIGHERA:
13018 case R_PPC64_DTPREL16_HIGHEST:
13019 case R_PPC64_DTPREL16_HIGHESTA:
13020 /* It's just possible that this symbol is a weak symbol
13021 that's not actually defined anywhere. In that case,
13022 'sec' would be NULL, and we should leave the symbol
13023 alone (it will be set to zero elsewhere in the link). */
13024 if (sec == NULL)
13025 break;
13026 /* Fall thru */
13027
13028 case R_PPC64_GOT16_HA:
13029 case R_PPC64_PLTGOT16_HA:
13030 case R_PPC64_PLT16_HA:
13031 case R_PPC64_GOT_TLSGD16_HA:
13032 case R_PPC64_GOT_TLSLD16_HA:
13033 case R_PPC64_GOT_TPREL16_HA:
13034 case R_PPC64_GOT_DTPREL16_HA:
13035 /* Add 0x10000 if sign bit in 0:15 is set.
13036 Bits 0:15 are not used. */
13037 addend += 0x8000;
13038 break;
13039
13040 case R_PPC64_ADDR16_DS:
13041 case R_PPC64_ADDR16_LO_DS:
13042 case R_PPC64_GOT16_DS:
13043 case R_PPC64_GOT16_LO_DS:
13044 case R_PPC64_PLT16_LO_DS:
13045 case R_PPC64_SECTOFF_DS:
13046 case R_PPC64_SECTOFF_LO_DS:
13047 case R_PPC64_TOC16_DS:
13048 case R_PPC64_TOC16_LO_DS:
13049 case R_PPC64_PLTGOT16_DS:
13050 case R_PPC64_PLTGOT16_LO_DS:
13051 case R_PPC64_GOT_TPREL16_DS:
13052 case R_PPC64_GOT_TPREL16_LO_DS:
13053 case R_PPC64_GOT_DTPREL16_DS:
13054 case R_PPC64_GOT_DTPREL16_LO_DS:
13055 case R_PPC64_TPREL16_DS:
13056 case R_PPC64_TPREL16_LO_DS:
13057 case R_PPC64_DTPREL16_DS:
13058 case R_PPC64_DTPREL16_LO_DS:
13059 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13060 mask = 3;
13061 /* If this reloc is against an lq insn, then the value must be
13062 a multiple of 16. This is somewhat of a hack, but the
13063 "correct" way to do this by defining _DQ forms of all the
13064 _DS relocs bloats all reloc switches in this file. It
13065 doesn't seem to make much sense to use any of these relocs
13066 in data, so testing the insn should be safe. */
13067 if ((insn & (0x3f << 26)) == (56u << 26))
13068 mask = 15;
13069 if (((relocation + addend) & mask) != 0)
13070 {
13071 (*_bfd_error_handler)
13072 (_("%B: error: relocation %s not a multiple of %d"),
13073 input_bfd,
13074 ppc64_elf_howto_table[r_type]->name,
13075 mask + 1);
13076 bfd_set_error (bfd_error_bad_value);
13077 ret = FALSE;
13078 continue;
13079 }
13080 break;
13081 }
13082
13083 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13084 because such sections are not SEC_ALLOC and thus ld.so will
13085 not process them. */
13086 if (unresolved_reloc
13087 && !((input_section->flags & SEC_DEBUGGING) != 0
13088 && h->elf.def_dynamic))
13089 {
13090 (*_bfd_error_handler)
13091 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13092 input_bfd,
13093 input_section,
13094 (long) rel->r_offset,
13095 ppc64_elf_howto_table[(int) r_type]->name,
13096 h->elf.root.root.string);
13097 ret = FALSE;
13098 }
13099
13100 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13101 input_bfd,
13102 input_section,
13103 contents,
13104 rel->r_offset,
13105 relocation,
13106 addend);
13107
13108 if (r != bfd_reloc_ok)
13109 {
13110 if (sym_name == NULL)
13111 sym_name = "(null)";
13112 if (r == bfd_reloc_overflow)
13113 {
13114 if (warned)
13115 continue;
13116 if (h != NULL
13117 && h->elf.root.type == bfd_link_hash_undefweak
13118 && ppc64_elf_howto_table[r_type]->pc_relative)
13119 {
13120 /* Assume this is a call protected by other code that
13121 detects the symbol is undefined. If this is the case,
13122 we can safely ignore the overflow. If not, the
13123 program is hosed anyway, and a little warning isn't
13124 going to help. */
13125
13126 continue;
13127 }
13128
13129 if (!((*info->callbacks->reloc_overflow)
13130 (info, (h ? &h->elf.root : NULL), sym_name,
13131 ppc64_elf_howto_table[r_type]->name,
13132 orig_addend, input_bfd, input_section, rel->r_offset)))
13133 return FALSE;
13134 }
13135 else
13136 {
13137 (*_bfd_error_handler)
13138 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13139 input_bfd,
13140 input_section,
13141 (long) rel->r_offset,
13142 ppc64_elf_howto_table[r_type]->name,
13143 sym_name,
13144 (int) r);
13145 ret = FALSE;
13146 }
13147 }
13148 }
13149
13150 /* If we're emitting relocations, then shortly after this function
13151 returns, reloc offsets and addends for this section will be
13152 adjusted. Worse, reloc symbol indices will be for the output
13153 file rather than the input. Save a copy of the relocs for
13154 opd_entry_value. */
13155 if (is_opd && (info->emitrelocations || info->relocatable))
13156 {
13157 bfd_size_type amt;
13158 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13159 rel = bfd_alloc (input_bfd, amt);
13160 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13161 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13162 if (rel == NULL)
13163 return FALSE;
13164 memcpy (rel, relocs, amt);
13165 }
13166 return ret;
13167 }
13168
13169 /* Adjust the value of any local symbols in opd sections. */
13170
13171 static int
13172 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13173 const char *name ATTRIBUTE_UNUSED,
13174 Elf_Internal_Sym *elfsym,
13175 asection *input_sec,
13176 struct elf_link_hash_entry *h)
13177 {
13178 struct _opd_sec_data *opd;
13179 long adjust;
13180 bfd_vma value;
13181
13182 if (h != NULL)
13183 return 1;
13184
13185 opd = get_opd_info (input_sec);
13186 if (opd == NULL || opd->adjust == NULL)
13187 return 1;
13188
13189 value = elfsym->st_value - input_sec->output_offset;
13190 if (!info->relocatable)
13191 value -= input_sec->output_section->vma;
13192
13193 adjust = opd->adjust[value / 8];
13194 if (adjust == -1)
13195 return 2;
13196
13197 elfsym->st_value += adjust;
13198 return 1;
13199 }
13200
13201 /* Finish up dynamic symbol handling. We set the contents of various
13202 dynamic sections here. */
13203
13204 static bfd_boolean
13205 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13206 struct bfd_link_info *info,
13207 struct elf_link_hash_entry *h,
13208 Elf_Internal_Sym *sym)
13209 {
13210 struct ppc_link_hash_table *htab;
13211 struct plt_entry *ent;
13212 Elf_Internal_Rela rela;
13213 bfd_byte *loc;
13214
13215 htab = ppc_hash_table (info);
13216 if (htab == NULL)
13217 return FALSE;
13218
13219 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13220 if (ent->plt.offset != (bfd_vma) -1)
13221 {
13222 /* This symbol has an entry in the procedure linkage
13223 table. Set it up. */
13224 if (!htab->elf.dynamic_sections_created
13225 || h->dynindx == -1)
13226 {
13227 BFD_ASSERT (h->type == STT_GNU_IFUNC
13228 && h->def_regular
13229 && (h->root.type == bfd_link_hash_defined
13230 || h->root.type == bfd_link_hash_defweak));
13231 rela.r_offset = (htab->iplt->output_section->vma
13232 + htab->iplt->output_offset
13233 + ent->plt.offset);
13234 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13235 rela.r_addend = (h->root.u.def.value
13236 + h->root.u.def.section->output_offset
13237 + h->root.u.def.section->output_section->vma
13238 + ent->addend);
13239 loc = (htab->reliplt->contents
13240 + (htab->reliplt->reloc_count++
13241 * sizeof (Elf64_External_Rela)));
13242 }
13243 else
13244 {
13245 rela.r_offset = (htab->plt->output_section->vma
13246 + htab->plt->output_offset
13247 + ent->plt.offset);
13248 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13249 rela.r_addend = ent->addend;
13250 loc = (htab->relplt->contents
13251 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13252 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13253 }
13254 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13255 }
13256
13257 if (h->needs_copy)
13258 {
13259 /* This symbol needs a copy reloc. Set it up. */
13260
13261 if (h->dynindx == -1
13262 || (h->root.type != bfd_link_hash_defined
13263 && h->root.type != bfd_link_hash_defweak)
13264 || htab->relbss == NULL)
13265 abort ();
13266
13267 rela.r_offset = (h->root.u.def.value
13268 + h->root.u.def.section->output_section->vma
13269 + h->root.u.def.section->output_offset);
13270 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13271 rela.r_addend = 0;
13272 loc = htab->relbss->contents;
13273 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13274 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13275 }
13276
13277 /* Mark some specially defined symbols as absolute. */
13278 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13279 sym->st_shndx = SHN_ABS;
13280
13281 return TRUE;
13282 }
13283
13284 /* Used to decide how to sort relocs in an optimal manner for the
13285 dynamic linker, before writing them out. */
13286
13287 static enum elf_reloc_type_class
13288 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13289 {
13290 enum elf_ppc64_reloc_type r_type;
13291
13292 r_type = ELF64_R_TYPE (rela->r_info);
13293 switch (r_type)
13294 {
13295 case R_PPC64_RELATIVE:
13296 return reloc_class_relative;
13297 case R_PPC64_JMP_SLOT:
13298 return reloc_class_plt;
13299 case R_PPC64_COPY:
13300 return reloc_class_copy;
13301 default:
13302 return reloc_class_normal;
13303 }
13304 }
13305
13306 /* Finish up the dynamic sections. */
13307
13308 static bfd_boolean
13309 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13310 struct bfd_link_info *info)
13311 {
13312 struct ppc_link_hash_table *htab;
13313 bfd *dynobj;
13314 asection *sdyn;
13315
13316 htab = ppc_hash_table (info);
13317 if (htab == NULL)
13318 return FALSE;
13319
13320 dynobj = htab->elf.dynobj;
13321 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13322
13323 if (htab->elf.dynamic_sections_created)
13324 {
13325 Elf64_External_Dyn *dyncon, *dynconend;
13326
13327 if (sdyn == NULL || htab->got == NULL)
13328 abort ();
13329
13330 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13331 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13332 for (; dyncon < dynconend; dyncon++)
13333 {
13334 Elf_Internal_Dyn dyn;
13335 asection *s;
13336
13337 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13338
13339 switch (dyn.d_tag)
13340 {
13341 default:
13342 continue;
13343
13344 case DT_PPC64_GLINK:
13345 s = htab->glink;
13346 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13347 /* We stupidly defined DT_PPC64_GLINK to be the start
13348 of glink rather than the first entry point, which is
13349 what ld.so needs, and now have a bigger stub to
13350 support automatic multiple TOCs. */
13351 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13352 break;
13353
13354 case DT_PPC64_OPD:
13355 s = bfd_get_section_by_name (output_bfd, ".opd");
13356 if (s == NULL)
13357 continue;
13358 dyn.d_un.d_ptr = s->vma;
13359 break;
13360
13361 case DT_PPC64_OPDSZ:
13362 s = bfd_get_section_by_name (output_bfd, ".opd");
13363 if (s == NULL)
13364 continue;
13365 dyn.d_un.d_val = s->size;
13366 break;
13367
13368 case DT_PLTGOT:
13369 s = htab->plt;
13370 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13371 break;
13372
13373 case DT_JMPREL:
13374 s = htab->relplt;
13375 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13376 break;
13377
13378 case DT_PLTRELSZ:
13379 dyn.d_un.d_val = htab->relplt->size;
13380 break;
13381
13382 case DT_RELASZ:
13383 /* Don't count procedure linkage table relocs in the
13384 overall reloc count. */
13385 s = htab->relplt;
13386 if (s == NULL)
13387 continue;
13388 dyn.d_un.d_val -= s->size;
13389 break;
13390
13391 case DT_RELA:
13392 /* We may not be using the standard ELF linker script.
13393 If .rela.plt is the first .rela section, we adjust
13394 DT_RELA to not include it. */
13395 s = htab->relplt;
13396 if (s == NULL)
13397 continue;
13398 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13399 continue;
13400 dyn.d_un.d_ptr += s->size;
13401 break;
13402 }
13403
13404 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13405 }
13406 }
13407
13408 if (htab->got != NULL && htab->got->size != 0)
13409 {
13410 /* Fill in the first entry in the global offset table.
13411 We use it to hold the link-time TOCbase. */
13412 bfd_put_64 (output_bfd,
13413 elf_gp (output_bfd) + TOC_BASE_OFF,
13414 htab->got->contents);
13415
13416 /* Set .got entry size. */
13417 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13418 }
13419
13420 if (htab->plt != NULL && htab->plt->size != 0)
13421 {
13422 /* Set .plt entry size. */
13423 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13424 = PLT_ENTRY_SIZE;
13425 }
13426
13427 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13428 brlt ourselves if emitrelocations. */
13429 if (htab->brlt != NULL
13430 && htab->brlt->reloc_count != 0
13431 && !_bfd_elf_link_output_relocs (output_bfd,
13432 htab->brlt,
13433 &elf_section_data (htab->brlt)->rel_hdr,
13434 elf_section_data (htab->brlt)->relocs,
13435 NULL))
13436 return FALSE;
13437
13438 if (htab->glink != NULL
13439 && htab->glink->reloc_count != 0
13440 && !_bfd_elf_link_output_relocs (output_bfd,
13441 htab->glink,
13442 &elf_section_data (htab->glink)->rel_hdr,
13443 elf_section_data (htab->glink)->relocs,
13444 NULL))
13445 return FALSE;
13446
13447 /* We need to handle writing out multiple GOT sections ourselves,
13448 since we didn't add them to DYNOBJ. We know dynobj is the first
13449 bfd. */
13450 while ((dynobj = dynobj->link_next) != NULL)
13451 {
13452 asection *s;
13453
13454 if (!is_ppc64_elf (dynobj))
13455 continue;
13456
13457 s = ppc64_elf_tdata (dynobj)->got;
13458 if (s != NULL
13459 && s->size != 0
13460 && s->output_section != bfd_abs_section_ptr
13461 && !bfd_set_section_contents (output_bfd, s->output_section,
13462 s->contents, s->output_offset,
13463 s->size))
13464 return FALSE;
13465 s = ppc64_elf_tdata (dynobj)->relgot;
13466 if (s != NULL
13467 && s->size != 0
13468 && s->output_section != bfd_abs_section_ptr
13469 && !bfd_set_section_contents (output_bfd, s->output_section,
13470 s->contents, s->output_offset,
13471 s->size))
13472 return FALSE;
13473 }
13474
13475 return TRUE;
13476 }
13477
13478 #include "elf64-target.h"
git-cvsimport of binutils cvsroot