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PR ld/11384
[binutils.git] / bfd / elf64-ppc.c
blobb1527f9318175476644a51fe01211eef3c6da2c2
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, **sym_hashes_end;
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
4878 sym_hashes = elf_sym_hashes (abfd);
4879 sym_hashes_end = (sym_hashes
4880 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4881 - symtab_hdr->sh_info);
4882
4883 sreloc = NULL;
4884 opd_sym_map = NULL;
4885 if (strcmp (sec->name, ".opd") == 0)
4886 {
4887 /* Garbage collection needs some extra help with .opd sections.
4888 We don't want to necessarily keep everything referenced by
4889 relocs in .opd, as that would keep all functions. Instead,
4890 if we reference an .opd symbol (a function descriptor), we
4891 want to keep the function code symbol's section. This is
4892 easy for global symbols, but for local syms we need to keep
4893 information about the associated function section. */
4894 bfd_size_type amt;
4895
4896 amt = sec->size * sizeof (*opd_sym_map) / 8;
4897 opd_sym_map = bfd_zalloc (abfd, amt);
4898 if (opd_sym_map == NULL)
4899 return FALSE;
4900 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4901 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4902 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4903 }
4904
4905 if (htab->sfpr == NULL
4906 && !create_linkage_sections (htab->elf.dynobj, info))
4907 return FALSE;
4908
4909 rel_end = relocs + sec->reloc_count;
4910 for (rel = relocs; rel < rel_end; rel++)
4911 {
4912 unsigned long r_symndx;
4913 struct elf_link_hash_entry *h;
4914 enum elf_ppc64_reloc_type r_type;
4915 int tls_type;
4916 struct _ppc64_elf_section_data *ppc64_sec;
4917 struct plt_entry **ifunc;
4918
4919 r_symndx = ELF64_R_SYM (rel->r_info);
4920 if (r_symndx < symtab_hdr->sh_info)
4921 h = NULL;
4922 else
4923 {
4924 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4925 h = elf_follow_link (h);
4926 }
4927
4928 tls_type = 0;
4929 ifunc = NULL;
4930 if (h != NULL)
4931 {
4932 if (h->type == STT_GNU_IFUNC)
4933 {
4934 h->needs_plt = 1;
4935 ifunc = &h->plt.plist;
4936 }
4937 }
4938 else
4939 {
4940 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4941 abfd, r_symndx);
4942 if (isym == NULL)
4943 return FALSE;
4944
4945 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4946 {
4947 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4948 rel->r_addend, PLT_IFUNC);
4949 if (ifunc == NULL)
4950 return FALSE;
4951 }
4952 }
4953 r_type = ELF64_R_TYPE (rel->r_info);
4954 if (is_branch_reloc (r_type))
4955 {
4956 if (h != NULL && (h == tga || h == dottga))
4957 {
4958 if (rel != relocs
4959 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4960 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4961 /* We have a new-style __tls_get_addr call with a marker
4962 reloc. */
4963 ;
4964 else
4965 /* Mark this section as having an old-style call. */
4966 sec->has_tls_get_addr_call = 1;
4967 }
4968
4969 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4970 if (ifunc != NULL
4971 && !update_plt_info (abfd, ifunc, rel->r_addend))
4972 return FALSE;
4973 }
4974
4975 switch (r_type)
4976 {
4977 case R_PPC64_TLSGD:
4978 case R_PPC64_TLSLD:
4979 /* These special tls relocs tie a call to __tls_get_addr with
4980 its parameter symbol. */
4981 break;
4982
4983 case R_PPC64_GOT_TLSLD16:
4984 case R_PPC64_GOT_TLSLD16_LO:
4985 case R_PPC64_GOT_TLSLD16_HI:
4986 case R_PPC64_GOT_TLSLD16_HA:
4987 tls_type = TLS_TLS | TLS_LD;
4988 goto dogottls;
4989
4990 case R_PPC64_GOT_TLSGD16:
4991 case R_PPC64_GOT_TLSGD16_LO:
4992 case R_PPC64_GOT_TLSGD16_HI:
4993 case R_PPC64_GOT_TLSGD16_HA:
4994 tls_type = TLS_TLS | TLS_GD;
4995 goto dogottls;
4996
4997 case R_PPC64_GOT_TPREL16_DS:
4998 case R_PPC64_GOT_TPREL16_LO_DS:
4999 case R_PPC64_GOT_TPREL16_HI:
5000 case R_PPC64_GOT_TPREL16_HA:
5001 if (!info->executable)
5002 info->flags |= DF_STATIC_TLS;
5003 tls_type = TLS_TLS | TLS_TPREL;
5004 goto dogottls;
5005
5006 case R_PPC64_GOT_DTPREL16_DS:
5007 case R_PPC64_GOT_DTPREL16_LO_DS:
5008 case R_PPC64_GOT_DTPREL16_HI:
5009 case R_PPC64_GOT_DTPREL16_HA:
5010 tls_type = TLS_TLS | TLS_DTPREL;
5011 dogottls:
5012 sec->has_tls_reloc = 1;
5013 /* Fall thru */
5014
5015 case R_PPC64_GOT16:
5016 case R_PPC64_GOT16_DS:
5017 case R_PPC64_GOT16_HA:
5018 case R_PPC64_GOT16_HI:
5019 case R_PPC64_GOT16_LO:
5020 case R_PPC64_GOT16_LO_DS:
5021 /* This symbol requires a global offset table entry. */
5022 sec->has_toc_reloc = 1;
5023 if (r_type == R_PPC64_GOT_TLSLD16
5024 || r_type == R_PPC64_GOT_TLSGD16
5025 || r_type == R_PPC64_GOT_TPREL16_DS
5026 || r_type == R_PPC64_GOT_DTPREL16_DS
5027 || r_type == R_PPC64_GOT16
5028 || r_type == R_PPC64_GOT16_DS)
5029 {
5030 htab->do_multi_toc = 1;
5031 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5032 }
5033
5034 if (ppc64_elf_tdata (abfd)->got == NULL
5035 && !create_got_section (abfd, info))
5036 return FALSE;
5037
5038 if (h != NULL)
5039 {
5040 struct ppc_link_hash_entry *eh;
5041 struct got_entry *ent;
5042
5043 eh = (struct ppc_link_hash_entry *) h;
5044 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5045 if (ent->addend == rel->r_addend
5046 && ent->owner == abfd
5047 && ent->tls_type == tls_type)
5048 break;
5049 if (ent == NULL)
5050 {
5051 bfd_size_type amt = sizeof (*ent);
5052 ent = bfd_alloc (abfd, amt);
5053 if (ent == NULL)
5054 return FALSE;
5055 ent->next = eh->elf.got.glist;
5056 ent->addend = rel->r_addend;
5057 ent->owner = abfd;
5058 ent->tls_type = tls_type;
5059 ent->is_indirect = FALSE;
5060 ent->got.refcount = 0;
5061 eh->elf.got.glist = ent;
5062 }
5063 ent->got.refcount += 1;
5064 eh->tls_mask |= tls_type;
5065 }
5066 else
5067 /* This is a global offset table entry for a local symbol. */
5068 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5069 rel->r_addend, tls_type))
5070 return FALSE;
5071 break;
5072
5073 case R_PPC64_PLT16_HA:
5074 case R_PPC64_PLT16_HI:
5075 case R_PPC64_PLT16_LO:
5076 case R_PPC64_PLT32:
5077 case R_PPC64_PLT64:
5078 /* This symbol requires a procedure linkage table entry. We
5079 actually build the entry in adjust_dynamic_symbol,
5080 because this might be a case of linking PIC code without
5081 linking in any dynamic objects, in which case we don't
5082 need to generate a procedure linkage table after all. */
5083 if (h == NULL)
5084 {
5085 /* It does not make sense to have a procedure linkage
5086 table entry for a local symbol. */
5087 bfd_set_error (bfd_error_bad_value);
5088 return FALSE;
5089 }
5090 else
5091 {
5092 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5093 return FALSE;
5094 h->needs_plt = 1;
5095 if (h->root.root.string[0] == '.'
5096 && h->root.root.string[1] != '\0')
5097 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5098 }
5099 break;
5100
5101 /* The following relocations don't need to propagate the
5102 relocation if linking a shared object since they are
5103 section relative. */
5104 case R_PPC64_SECTOFF:
5105 case R_PPC64_SECTOFF_LO:
5106 case R_PPC64_SECTOFF_HI:
5107 case R_PPC64_SECTOFF_HA:
5108 case R_PPC64_SECTOFF_DS:
5109 case R_PPC64_SECTOFF_LO_DS:
5110 case R_PPC64_DTPREL16:
5111 case R_PPC64_DTPREL16_LO:
5112 case R_PPC64_DTPREL16_HI:
5113 case R_PPC64_DTPREL16_HA:
5114 case R_PPC64_DTPREL16_DS:
5115 case R_PPC64_DTPREL16_LO_DS:
5116 case R_PPC64_DTPREL16_HIGHER:
5117 case R_PPC64_DTPREL16_HIGHERA:
5118 case R_PPC64_DTPREL16_HIGHEST:
5119 case R_PPC64_DTPREL16_HIGHESTA:
5120 break;
5121
5122 /* Nor do these. */
5123 case R_PPC64_REL16:
5124 case R_PPC64_REL16_LO:
5125 case R_PPC64_REL16_HI:
5126 case R_PPC64_REL16_HA:
5127 break;
5128
5129 case R_PPC64_TOC16:
5130 case R_PPC64_TOC16_DS:
5131 htab->do_multi_toc = 1;
5132 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5133 case R_PPC64_TOC16_LO:
5134 case R_PPC64_TOC16_HI:
5135 case R_PPC64_TOC16_HA:
5136 case R_PPC64_TOC16_LO_DS:
5137 sec->has_toc_reloc = 1;
5138 break;
5139
5140 /* This relocation describes the C++ object vtable hierarchy.
5141 Reconstruct it for later use during GC. */
5142 case R_PPC64_GNU_VTINHERIT:
5143 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5144 return FALSE;
5145 break;
5146
5147 /* This relocation describes which C++ vtable entries are actually
5148 used. Record for later use during GC. */
5149 case R_PPC64_GNU_VTENTRY:
5150 BFD_ASSERT (h != NULL);
5151 if (h != NULL
5152 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5153 return FALSE;
5154 break;
5155
5156 case R_PPC64_REL14:
5157 case R_PPC64_REL14_BRTAKEN:
5158 case R_PPC64_REL14_BRNTAKEN:
5159 {
5160 asection *dest = NULL;
5161
5162 /* Heuristic: If jumping outside our section, chances are
5163 we are going to need a stub. */
5164 if (h != NULL)
5165 {
5166 /* If the sym is weak it may be overridden later, so
5167 don't assume we know where a weak sym lives. */
5168 if (h->root.type == bfd_link_hash_defined)
5169 dest = h->root.u.def.section;
5170 }
5171 else
5172 {
5173 Elf_Internal_Sym *isym;
5174
5175 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5176 abfd, r_symndx);
5177 if (isym == NULL)
5178 return FALSE;
5179
5180 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5181 }
5182
5183 if (dest != sec)
5184 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5185 }
5186 /* Fall through. */
5187
5188 case R_PPC64_REL24:
5189 if (h != NULL && ifunc == NULL)
5190 {
5191 /* We may need a .plt entry if the function this reloc
5192 refers to is in a shared lib. */
5193 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5194 return FALSE;
5195 h->needs_plt = 1;
5196 if (h->root.root.string[0] == '.'
5197 && h->root.root.string[1] != '\0')
5198 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5199 if (h == tga || h == dottga)
5200 sec->has_tls_reloc = 1;
5201 }
5202 break;
5203
5204 case R_PPC64_TPREL64:
5205 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5206 if (!info->executable)
5207 info->flags |= DF_STATIC_TLS;
5208 goto dotlstoc;
5209
5210 case R_PPC64_DTPMOD64:
5211 if (rel + 1 < rel_end
5212 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5213 && rel[1].r_offset == rel->r_offset + 8)
5214 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5215 else
5216 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5217 goto dotlstoc;
5218
5219 case R_PPC64_DTPREL64:
5220 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5221 if (rel != relocs
5222 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5223 && rel[-1].r_offset == rel->r_offset - 8)
5224 /* This is the second reloc of a dtpmod, dtprel pair.
5225 Don't mark with TLS_DTPREL. */
5226 goto dodyn;
5227
5228 dotlstoc:
5229 sec->has_tls_reloc = 1;
5230 if (h != NULL)
5231 {
5232 struct ppc_link_hash_entry *eh;
5233 eh = (struct ppc_link_hash_entry *) h;
5234 eh->tls_mask |= tls_type;
5235 }
5236 else
5237 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5238 rel->r_addend, tls_type))
5239 return FALSE;
5240
5241 ppc64_sec = ppc64_elf_section_data (sec);
5242 if (ppc64_sec->sec_type != sec_toc)
5243 {
5244 bfd_size_type amt;
5245
5246 /* One extra to simplify get_tls_mask. */
5247 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5248 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5249 if (ppc64_sec->u.toc.symndx == NULL)
5250 return FALSE;
5251 amt = sec->size * sizeof (bfd_vma) / 8;
5252 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5253 if (ppc64_sec->u.toc.add == NULL)
5254 return FALSE;
5255 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5256 ppc64_sec->sec_type = sec_toc;
5257 }
5258 BFD_ASSERT (rel->r_offset % 8 == 0);
5259 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5260 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5261
5262 /* Mark the second slot of a GD or LD entry.
5263 -1 to indicate GD and -2 to indicate LD. */
5264 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5265 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5266 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5267 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5268 goto dodyn;
5269
5270 case R_PPC64_TPREL16:
5271 case R_PPC64_TPREL16_LO:
5272 case R_PPC64_TPREL16_HI:
5273 case R_PPC64_TPREL16_HA:
5274 case R_PPC64_TPREL16_DS:
5275 case R_PPC64_TPREL16_LO_DS:
5276 case R_PPC64_TPREL16_HIGHER:
5277 case R_PPC64_TPREL16_HIGHERA:
5278 case R_PPC64_TPREL16_HIGHEST:
5279 case R_PPC64_TPREL16_HIGHESTA:
5280 if (info->shared)
5281 {
5282 if (!info->executable)
5283 info->flags |= DF_STATIC_TLS;
5284 goto dodyn;
5285 }
5286 break;
5287
5288 case R_PPC64_ADDR64:
5289 if (opd_sym_map != NULL
5290 && rel + 1 < rel_end
5291 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5292 {
5293 if (h != NULL)
5294 {
5295 if (h->root.root.string[0] == '.'
5296 && h->root.root.string[1] != 0
5297 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5298 ;
5299 else
5300 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5301 }
5302 else
5303 {
5304 asection *s;
5305 Elf_Internal_Sym *isym;
5306
5307 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5308 abfd, r_symndx);
5309 if (isym == NULL)
5310 return FALSE;
5311
5312 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5313 if (s != NULL && s != sec)
5314 opd_sym_map[rel->r_offset / 8] = s;
5315 }
5316 }
5317 /* Fall through. */
5318
5319 case R_PPC64_REL30:
5320 case R_PPC64_REL32:
5321 case R_PPC64_REL64:
5322 case R_PPC64_ADDR14:
5323 case R_PPC64_ADDR14_BRNTAKEN:
5324 case R_PPC64_ADDR14_BRTAKEN:
5325 case R_PPC64_ADDR16:
5326 case R_PPC64_ADDR16_DS:
5327 case R_PPC64_ADDR16_HA:
5328 case R_PPC64_ADDR16_HI:
5329 case R_PPC64_ADDR16_HIGHER:
5330 case R_PPC64_ADDR16_HIGHERA:
5331 case R_PPC64_ADDR16_HIGHEST:
5332 case R_PPC64_ADDR16_HIGHESTA:
5333 case R_PPC64_ADDR16_LO:
5334 case R_PPC64_ADDR16_LO_DS:
5335 case R_PPC64_ADDR24:
5336 case R_PPC64_ADDR32:
5337 case R_PPC64_UADDR16:
5338 case R_PPC64_UADDR32:
5339 case R_PPC64_UADDR64:
5340 case R_PPC64_TOC:
5341 if (h != NULL && !info->shared)
5342 /* We may need a copy reloc. */
5343 h->non_got_ref = 1;
5344
5345 /* Don't propagate .opd relocs. */
5346 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5347 break;
5348
5349 /* If we are creating a shared library, and this is a reloc
5350 against a global symbol, or a non PC relative reloc
5351 against a local symbol, then we need to copy the reloc
5352 into the shared library. However, if we are linking with
5353 -Bsymbolic, we do not need to copy a reloc against a
5354 global symbol which is defined in an object we are
5355 including in the link (i.e., DEF_REGULAR is set). At
5356 this point we have not seen all the input files, so it is
5357 possible that DEF_REGULAR is not set now but will be set
5358 later (it is never cleared). In case of a weak definition,
5359 DEF_REGULAR may be cleared later by a strong definition in
5360 a shared library. We account for that possibility below by
5361 storing information in the dyn_relocs field of the hash
5362 table entry. A similar situation occurs when creating
5363 shared libraries and symbol visibility changes render the
5364 symbol local.
5365
5366 If on the other hand, we are creating an executable, we
5367 may need to keep relocations for symbols satisfied by a
5368 dynamic library if we manage to avoid copy relocs for the
5369 symbol. */
5370 dodyn:
5371 if ((info->shared
5372 && (must_be_dyn_reloc (info, r_type)
5373 || (h != NULL
5374 && (! info->symbolic
5375 || h->root.type == bfd_link_hash_defweak
5376 || !h->def_regular))))
5377 || (ELIMINATE_COPY_RELOCS
5378 && !info->shared
5379 && h != NULL
5380 && (h->root.type == bfd_link_hash_defweak
5381 || !h->def_regular))
5382 || (!info->shared
5383 && ifunc != NULL))
5384 {
5385 struct ppc_dyn_relocs *p;
5386 struct ppc_dyn_relocs **head;
5387
5388 /* We must copy these reloc types into the output file.
5389 Create a reloc section in dynobj and make room for
5390 this reloc. */
5391 if (sreloc == NULL)
5392 {
5393 sreloc = _bfd_elf_make_dynamic_reloc_section
5394 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5395
5396 if (sreloc == NULL)
5397 return FALSE;
5398 }
5399
5400 /* If this is a global symbol, we count the number of
5401 relocations we need for this symbol. */
5402 if (h != NULL)
5403 {
5404 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5405 }
5406 else
5407 {
5408 /* Track dynamic relocs needed for local syms too.
5409 We really need local syms available to do this
5410 easily. Oh well. */
5411 asection *s;
5412 void *vpp;
5413 Elf_Internal_Sym *isym;
5414
5415 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5416 abfd, r_symndx);
5417 if (isym == NULL)
5418 return FALSE;
5419
5420 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5421 if (s == NULL)
5422 s = sec;
5423
5424 vpp = &elf_section_data (s)->local_dynrel;
5425 head = (struct ppc_dyn_relocs **) vpp;
5426 }
5427
5428 p = *head;
5429 if (p == NULL || p->sec != sec)
5430 {
5431 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5432 if (p == NULL)
5433 return FALSE;
5434 p->next = *head;
5435 *head = p;
5436 p->sec = sec;
5437 p->count = 0;
5438 p->pc_count = 0;
5439 }
5440
5441 p->count += 1;
5442 if (!must_be_dyn_reloc (info, r_type))
5443 p->pc_count += 1;
5444 }
5445 break;
5446
5447 default:
5448 break;
5449 }
5450 }
5451
5452 return TRUE;
5453 }
5454
5455 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5456 of the code entry point, and its section. */
5457
5458 static bfd_vma
5459 opd_entry_value (asection *opd_sec,
5460 bfd_vma offset,
5461 asection **code_sec,
5462 bfd_vma *code_off)
5463 {
5464 bfd *opd_bfd = opd_sec->owner;
5465 Elf_Internal_Rela *relocs;
5466 Elf_Internal_Rela *lo, *hi, *look;
5467 bfd_vma val;
5468
5469 /* No relocs implies we are linking a --just-symbols object. */
5470 if (opd_sec->reloc_count == 0)
5471 {
5472 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5473 return (bfd_vma) -1;
5474
5475 if (code_sec != NULL)
5476 {
5477 asection *sec, *likely = NULL;
5478 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5479 if (sec->vma <= val
5480 && (sec->flags & SEC_LOAD) != 0
5481 && (sec->flags & SEC_ALLOC) != 0)
5482 likely = sec;
5483 if (likely != NULL)
5484 {
5485 *code_sec = likely;
5486 if (code_off != NULL)
5487 *code_off = val - likely->vma;
5488 }
5489 }
5490 return val;
5491 }
5492
5493 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5494
5495 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5496 if (relocs == NULL)
5497 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5498
5499 /* Go find the opd reloc at the sym address. */
5500 lo = relocs;
5501 BFD_ASSERT (lo != NULL);
5502 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5503 val = (bfd_vma) -1;
5504 while (lo < hi)
5505 {
5506 look = lo + (hi - lo) / 2;
5507 if (look->r_offset < offset)
5508 lo = look + 1;
5509 else if (look->r_offset > offset)
5510 hi = look;
5511 else
5512 {
5513 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5514
5515 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5516 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5517 {
5518 unsigned long symndx = ELF64_R_SYM (look->r_info);
5519 asection *sec;
5520
5521 if (symndx < symtab_hdr->sh_info)
5522 {
5523 Elf_Internal_Sym *sym;
5524
5525 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5526 if (sym == NULL)
5527 {
5528 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5529 symtab_hdr->sh_info,
5530 0, NULL, NULL, NULL);
5531 if (sym == NULL)
5532 break;
5533 symtab_hdr->contents = (bfd_byte *) sym;
5534 }
5535
5536 sym += symndx;
5537 val = sym->st_value;
5538 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5539 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5540 }
5541 else
5542 {
5543 struct elf_link_hash_entry **sym_hashes;
5544 struct elf_link_hash_entry *rh;
5545
5546 sym_hashes = elf_sym_hashes (opd_bfd);
5547 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5548 rh = elf_follow_link (rh);
5549 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5550 || rh->root.type == bfd_link_hash_defweak);
5551 val = rh->root.u.def.value;
5552 sec = rh->root.u.def.section;
5553 }
5554 val += look->r_addend;
5555 if (code_off != NULL)
5556 *code_off = val;
5557 if (code_sec != NULL)
5558 *code_sec = sec;
5559 if (sec != NULL && sec->output_section != NULL)
5560 val += sec->output_section->vma + sec->output_offset;
5561 }
5562 break;
5563 }
5564 }
5565
5566 return val;
5567 }
5568
5569 /* If FDH is a function descriptor symbol, return the associated code
5570 entry symbol if it is defined. Return NULL otherwise. */
5571
5572 static struct ppc_link_hash_entry *
5573 defined_code_entry (struct ppc_link_hash_entry *fdh)
5574 {
5575 if (fdh->is_func_descriptor)
5576 {
5577 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5578 if (fh->elf.root.type == bfd_link_hash_defined
5579 || fh->elf.root.type == bfd_link_hash_defweak)
5580 return fh;
5581 }
5582 return NULL;
5583 }
5584
5585 /* If FH is a function code entry symbol, return the associated
5586 function descriptor symbol if it is defined. Return NULL otherwise. */
5587
5588 static struct ppc_link_hash_entry *
5589 defined_func_desc (struct ppc_link_hash_entry *fh)
5590 {
5591 if (fh->oh != NULL
5592 && fh->oh->is_func_descriptor)
5593 {
5594 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5595 if (fdh->elf.root.type == bfd_link_hash_defined
5596 || fdh->elf.root.type == bfd_link_hash_defweak)
5597 return fdh;
5598 }
5599 return NULL;
5600 }
5601
5602 /* Mark all our entry sym sections, both opd and code section. */
5603
5604 static void
5605 ppc64_elf_gc_keep (struct bfd_link_info *info)
5606 {
5607 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5608 struct bfd_sym_chain *sym;
5609
5610 if (htab == NULL)
5611 return;
5612
5613 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5614 {
5615 struct ppc_link_hash_entry *eh, *fh;
5616 asection *sec;
5617
5618 eh = (struct ppc_link_hash_entry *)
5619 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5620 if (eh == NULL)
5621 continue;
5622 if (eh->elf.root.type != bfd_link_hash_defined
5623 && eh->elf.root.type != bfd_link_hash_defweak)
5624 continue;
5625
5626 fh = defined_code_entry (eh);
5627 if (fh != NULL)
5628 {
5629 sec = fh->elf.root.u.def.section;
5630 sec->flags |= SEC_KEEP;
5631 }
5632 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5633 && opd_entry_value (eh->elf.root.u.def.section,
5634 eh->elf.root.u.def.value,
5635 &sec, NULL) != (bfd_vma) -1)
5636 sec->flags |= SEC_KEEP;
5637
5638 sec = eh->elf.root.u.def.section;
5639 sec->flags |= SEC_KEEP;
5640 }
5641 }
5642
5643 /* Mark sections containing dynamically referenced symbols. When
5644 building shared libraries, we must assume that any visible symbol is
5645 referenced. */
5646
5647 static bfd_boolean
5648 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5649 {
5650 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5651 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5652 struct ppc_link_hash_entry *fdh;
5653
5654 if (eh->elf.root.type == bfd_link_hash_warning)
5655 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5656
5657 /* Dynamic linking info is on the func descriptor sym. */
5658 fdh = defined_func_desc (eh);
5659 if (fdh != NULL)
5660 eh = fdh;
5661
5662 if ((eh->elf.root.type == bfd_link_hash_defined
5663 || eh->elf.root.type == bfd_link_hash_defweak)
5664 && (eh->elf.ref_dynamic
5665 || (!info->executable
5666 && eh->elf.def_regular
5667 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5668 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5669 {
5670 asection *code_sec;
5671 struct ppc_link_hash_entry *fh;
5672
5673 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5674
5675 /* Function descriptor syms cause the associated
5676 function code sym section to be marked. */
5677 fh = defined_code_entry (eh);
5678 if (fh != NULL)
5679 {
5680 code_sec = fh->elf.root.u.def.section;
5681 code_sec->flags |= SEC_KEEP;
5682 }
5683 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5684 && opd_entry_value (eh->elf.root.u.def.section,
5685 eh->elf.root.u.def.value,
5686 &code_sec, NULL) != (bfd_vma) -1)
5687 code_sec->flags |= SEC_KEEP;
5688 }
5689
5690 return TRUE;
5691 }
5692
5693 /* Return the section that should be marked against GC for a given
5694 relocation. */
5695
5696 static asection *
5697 ppc64_elf_gc_mark_hook (asection *sec,
5698 struct bfd_link_info *info,
5699 Elf_Internal_Rela *rel,
5700 struct elf_link_hash_entry *h,
5701 Elf_Internal_Sym *sym)
5702 {
5703 asection *rsec;
5704
5705 /* Syms return NULL if we're marking .opd, so we avoid marking all
5706 function sections, as all functions are referenced in .opd. */
5707 rsec = NULL;
5708 if (get_opd_info (sec) != NULL)
5709 return rsec;
5710
5711 if (h != NULL)
5712 {
5713 enum elf_ppc64_reloc_type r_type;
5714 struct ppc_link_hash_entry *eh, *fh, *fdh;
5715
5716 r_type = ELF64_R_TYPE (rel->r_info);
5717 switch (r_type)
5718 {
5719 case R_PPC64_GNU_VTINHERIT:
5720 case R_PPC64_GNU_VTENTRY:
5721 break;
5722
5723 default:
5724 switch (h->root.type)
5725 {
5726 case bfd_link_hash_defined:
5727 case bfd_link_hash_defweak:
5728 eh = (struct ppc_link_hash_entry *) h;
5729 fdh = defined_func_desc (eh);
5730 if (fdh != NULL)
5731 eh = fdh;
5732
5733 /* Function descriptor syms cause the associated
5734 function code sym section to be marked. */
5735 fh = defined_code_entry (eh);
5736 if (fh != NULL)
5737 {
5738 /* They also mark their opd section. */
5739 eh->elf.root.u.def.section->gc_mark = 1;
5740
5741 rsec = fh->elf.root.u.def.section;
5742 }
5743 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5744 && opd_entry_value (eh->elf.root.u.def.section,
5745 eh->elf.root.u.def.value,
5746 &rsec, NULL) != (bfd_vma) -1)
5747 eh->elf.root.u.def.section->gc_mark = 1;
5748 else
5749 rsec = h->root.u.def.section;
5750 break;
5751
5752 case bfd_link_hash_common:
5753 rsec = h->root.u.c.p->section;
5754 break;
5755
5756 default:
5757 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5758 }
5759 }
5760 }
5761 else
5762 {
5763 struct _opd_sec_data *opd;
5764
5765 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5766 opd = get_opd_info (rsec);
5767 if (opd != NULL && opd->func_sec != NULL)
5768 {
5769 rsec->gc_mark = 1;
5770
5771 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5772 }
5773 }
5774
5775 return rsec;
5776 }
5777
5778 /* Update the .got, .plt. and dynamic reloc reference counts for the
5779 section being removed. */
5780
5781 static bfd_boolean
5782 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5783 asection *sec, const Elf_Internal_Rela *relocs)
5784 {
5785 struct ppc_link_hash_table *htab;
5786 Elf_Internal_Shdr *symtab_hdr;
5787 struct elf_link_hash_entry **sym_hashes;
5788 struct got_entry **local_got_ents;
5789 const Elf_Internal_Rela *rel, *relend;
5790
5791 if (info->relocatable)
5792 return TRUE;
5793
5794 if ((sec->flags & SEC_ALLOC) == 0)
5795 return TRUE;
5796
5797 elf_section_data (sec)->local_dynrel = NULL;
5798
5799 htab = ppc_hash_table (info);
5800 if (htab == NULL)
5801 return FALSE;
5802
5803 symtab_hdr = &elf_symtab_hdr (abfd);
5804 sym_hashes = elf_sym_hashes (abfd);
5805 local_got_ents = elf_local_got_ents (abfd);
5806
5807 relend = relocs + sec->reloc_count;
5808 for (rel = relocs; rel < relend; rel++)
5809 {
5810 unsigned long r_symndx;
5811 enum elf_ppc64_reloc_type r_type;
5812 struct elf_link_hash_entry *h = NULL;
5813 unsigned char tls_type = 0;
5814
5815 r_symndx = ELF64_R_SYM (rel->r_info);
5816 r_type = ELF64_R_TYPE (rel->r_info);
5817 if (r_symndx >= symtab_hdr->sh_info)
5818 {
5819 struct ppc_link_hash_entry *eh;
5820 struct ppc_dyn_relocs **pp;
5821 struct ppc_dyn_relocs *p;
5822
5823 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5824 h = elf_follow_link (h);
5825 eh = (struct ppc_link_hash_entry *) h;
5826
5827 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5828 if (p->sec == sec)
5829 {
5830 /* Everything must go for SEC. */
5831 *pp = p->next;
5832 break;
5833 }
5834 }
5835
5836 if (is_branch_reloc (r_type))
5837 {
5838 struct plt_entry **ifunc = NULL;
5839 if (h != NULL)
5840 {
5841 if (h->type == STT_GNU_IFUNC)
5842 ifunc = &h->plt.plist;
5843 }
5844 else if (local_got_ents != NULL)
5845 {
5846 struct plt_entry **local_plt = (struct plt_entry **)
5847 (local_got_ents + symtab_hdr->sh_info);
5848 unsigned char *local_got_tls_masks = (unsigned char *)
5849 (local_plt + symtab_hdr->sh_info);
5850 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5851 ifunc = local_plt + r_symndx;
5852 }
5853 if (ifunc != NULL)
5854 {
5855 struct plt_entry *ent;
5856
5857 for (ent = *ifunc; ent != NULL; ent = ent->next)
5858 if (ent->addend == rel->r_addend)
5859 break;
5860 if (ent == NULL)
5861 abort ();
5862 if (ent->plt.refcount > 0)
5863 ent->plt.refcount -= 1;
5864 continue;
5865 }
5866 }
5867
5868 switch (r_type)
5869 {
5870 case R_PPC64_GOT_TLSLD16:
5871 case R_PPC64_GOT_TLSLD16_LO:
5872 case R_PPC64_GOT_TLSLD16_HI:
5873 case R_PPC64_GOT_TLSLD16_HA:
5874 tls_type = TLS_TLS | TLS_LD;
5875 goto dogot;
5876
5877 case R_PPC64_GOT_TLSGD16:
5878 case R_PPC64_GOT_TLSGD16_LO:
5879 case R_PPC64_GOT_TLSGD16_HI:
5880 case R_PPC64_GOT_TLSGD16_HA:
5881 tls_type = TLS_TLS | TLS_GD;
5882 goto dogot;
5883
5884 case R_PPC64_GOT_TPREL16_DS:
5885 case R_PPC64_GOT_TPREL16_LO_DS:
5886 case R_PPC64_GOT_TPREL16_HI:
5887 case R_PPC64_GOT_TPREL16_HA:
5888 tls_type = TLS_TLS | TLS_TPREL;
5889 goto dogot;
5890
5891 case R_PPC64_GOT_DTPREL16_DS:
5892 case R_PPC64_GOT_DTPREL16_LO_DS:
5893 case R_PPC64_GOT_DTPREL16_HI:
5894 case R_PPC64_GOT_DTPREL16_HA:
5895 tls_type = TLS_TLS | TLS_DTPREL;
5896 goto dogot;
5897
5898 case R_PPC64_GOT16:
5899 case R_PPC64_GOT16_DS:
5900 case R_PPC64_GOT16_HA:
5901 case R_PPC64_GOT16_HI:
5902 case R_PPC64_GOT16_LO:
5903 case R_PPC64_GOT16_LO_DS:
5904 dogot:
5905 {
5906 struct got_entry *ent;
5907
5908 if (h != NULL)
5909 ent = h->got.glist;
5910 else
5911 ent = local_got_ents[r_symndx];
5912
5913 for (; ent != NULL; ent = ent->next)
5914 if (ent->addend == rel->r_addend
5915 && ent->owner == abfd
5916 && ent->tls_type == tls_type)
5917 break;
5918 if (ent == NULL)
5919 abort ();
5920 if (ent->got.refcount > 0)
5921 ent->got.refcount -= 1;
5922 }
5923 break;
5924
5925 case R_PPC64_PLT16_HA:
5926 case R_PPC64_PLT16_HI:
5927 case R_PPC64_PLT16_LO:
5928 case R_PPC64_PLT32:
5929 case R_PPC64_PLT64:
5930 case R_PPC64_REL14:
5931 case R_PPC64_REL14_BRNTAKEN:
5932 case R_PPC64_REL14_BRTAKEN:
5933 case R_PPC64_REL24:
5934 if (h != NULL)
5935 {
5936 struct plt_entry *ent;
5937
5938 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5939 if (ent->addend == rel->r_addend)
5940 break;
5941 if (ent != NULL && ent->plt.refcount > 0)
5942 ent->plt.refcount -= 1;
5943 }
5944 break;
5945
5946 default:
5947 break;
5948 }
5949 }
5950 return TRUE;
5951 }
5952
5953 /* The maximum size of .sfpr. */
5954 #define SFPR_MAX (218*4)
5955
5956 struct sfpr_def_parms
5957 {
5958 const char name[12];
5959 unsigned char lo, hi;
5960 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5961 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5962 };
5963
5964 /* Auto-generate _save*, _rest* functions in .sfpr. */
5965
5966 static bfd_boolean
5967 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5968 {
5969 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5970 unsigned int i;
5971 size_t len = strlen (parm->name);
5972 bfd_boolean writing = FALSE;
5973 char sym[16];
5974
5975 if (htab == NULL)
5976 return FALSE;
5977
5978 memcpy (sym, parm->name, len);
5979 sym[len + 2] = 0;
5980
5981 for (i = parm->lo; i <= parm->hi; i++)
5982 {
5983 struct elf_link_hash_entry *h;
5984
5985 sym[len + 0] = i / 10 + '0';
5986 sym[len + 1] = i % 10 + '0';
5987 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5988 if (h != NULL
5989 && !h->def_regular)
5990 {
5991 h->root.type = bfd_link_hash_defined;
5992 h->root.u.def.section = htab->sfpr;
5993 h->root.u.def.value = htab->sfpr->size;
5994 h->type = STT_FUNC;
5995 h->def_regular = 1;
5996 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5997 writing = TRUE;
5998 if (htab->sfpr->contents == NULL)
5999 {
6000 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6001 if (htab->sfpr->contents == NULL)
6002 return FALSE;
6003 }
6004 }
6005 if (writing)
6006 {
6007 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6008 if (i != parm->hi)
6009 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6010 else
6011 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6012 htab->sfpr->size = p - htab->sfpr->contents;
6013 }
6014 }
6015
6016 return TRUE;
6017 }
6018
6019 static bfd_byte *
6020 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6021 {
6022 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6023 return p + 4;
6024 }
6025
6026 static bfd_byte *
6027 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6028 {
6029 p = savegpr0 (abfd, p, r);
6030 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6031 p = p + 4;
6032 bfd_put_32 (abfd, BLR, p);
6033 return p + 4;
6034 }
6035
6036 static bfd_byte *
6037 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6038 {
6039 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6040 return p + 4;
6041 }
6042
6043 static bfd_byte *
6044 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6045 {
6046 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6047 p = p + 4;
6048 p = restgpr0 (abfd, p, r);
6049 bfd_put_32 (abfd, MTLR_R0, p);
6050 p = p + 4;
6051 if (r == 29)
6052 {
6053 p = restgpr0 (abfd, p, 30);
6054 p = restgpr0 (abfd, p, 31);
6055 }
6056 bfd_put_32 (abfd, BLR, p);
6057 return p + 4;
6058 }
6059
6060 static bfd_byte *
6061 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6062 {
6063 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6064 return p + 4;
6065 }
6066
6067 static bfd_byte *
6068 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6069 {
6070 p = savegpr1 (abfd, p, r);
6071 bfd_put_32 (abfd, BLR, p);
6072 return p + 4;
6073 }
6074
6075 static bfd_byte *
6076 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6077 {
6078 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6079 return p + 4;
6080 }
6081
6082 static bfd_byte *
6083 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6084 {
6085 p = restgpr1 (abfd, p, r);
6086 bfd_put_32 (abfd, BLR, p);
6087 return p + 4;
6088 }
6089
6090 static bfd_byte *
6091 savefpr (bfd *abfd, bfd_byte *p, int r)
6092 {
6093 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6094 return p + 4;
6095 }
6096
6097 static bfd_byte *
6098 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6099 {
6100 p = savefpr (abfd, p, r);
6101 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6102 p = p + 4;
6103 bfd_put_32 (abfd, BLR, p);
6104 return p + 4;
6105 }
6106
6107 static bfd_byte *
6108 restfpr (bfd *abfd, bfd_byte *p, int r)
6109 {
6110 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6111 return p + 4;
6112 }
6113
6114 static bfd_byte *
6115 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6116 {
6117 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6118 p = p + 4;
6119 p = restfpr (abfd, p, r);
6120 bfd_put_32 (abfd, MTLR_R0, p);
6121 p = p + 4;
6122 if (r == 29)
6123 {
6124 p = restfpr (abfd, p, 30);
6125 p = restfpr (abfd, p, 31);
6126 }
6127 bfd_put_32 (abfd, BLR, p);
6128 return p + 4;
6129 }
6130
6131 static bfd_byte *
6132 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6133 {
6134 p = savefpr (abfd, p, r);
6135 bfd_put_32 (abfd, BLR, p);
6136 return p + 4;
6137 }
6138
6139 static bfd_byte *
6140 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6141 {
6142 p = restfpr (abfd, p, r);
6143 bfd_put_32 (abfd, BLR, p);
6144 return p + 4;
6145 }
6146
6147 static bfd_byte *
6148 savevr (bfd *abfd, bfd_byte *p, int r)
6149 {
6150 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6151 p = p + 4;
6152 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6153 return p + 4;
6154 }
6155
6156 static bfd_byte *
6157 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6158 {
6159 p = savevr (abfd, p, r);
6160 bfd_put_32 (abfd, BLR, p);
6161 return p + 4;
6162 }
6163
6164 static bfd_byte *
6165 restvr (bfd *abfd, bfd_byte *p, int r)
6166 {
6167 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6168 p = p + 4;
6169 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6170 return p + 4;
6171 }
6172
6173 static bfd_byte *
6174 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6175 {
6176 p = restvr (abfd, p, r);
6177 bfd_put_32 (abfd, BLR, p);
6178 return p + 4;
6179 }
6180
6181 /* Called via elf_link_hash_traverse to transfer dynamic linking
6182 information on function code symbol entries to their corresponding
6183 function descriptor symbol entries. */
6184
6185 static bfd_boolean
6186 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6187 {
6188 struct bfd_link_info *info;
6189 struct ppc_link_hash_table *htab;
6190 struct plt_entry *ent;
6191 struct ppc_link_hash_entry *fh;
6192 struct ppc_link_hash_entry *fdh;
6193 bfd_boolean force_local;
6194
6195 fh = (struct ppc_link_hash_entry *) h;
6196 if (fh->elf.root.type == bfd_link_hash_indirect)
6197 return TRUE;
6198
6199 if (fh->elf.root.type == bfd_link_hash_warning)
6200 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6201
6202 info = inf;
6203 htab = ppc_hash_table (info);
6204 if (htab == NULL)
6205 return FALSE;
6206
6207 /* Resolve undefined references to dot-symbols as the value
6208 in the function descriptor, if we have one in a regular object.
6209 This is to satisfy cases like ".quad .foo". Calls to functions
6210 in dynamic objects are handled elsewhere. */
6211 if (fh->elf.root.type == bfd_link_hash_undefweak
6212 && fh->was_undefined
6213 && (fdh = defined_func_desc (fh)) != NULL
6214 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6215 && opd_entry_value (fdh->elf.root.u.def.section,
6216 fdh->elf.root.u.def.value,
6217 &fh->elf.root.u.def.section,
6218 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6219 {
6220 fh->elf.root.type = fdh->elf.root.type;
6221 fh->elf.forced_local = 1;
6222 fh->elf.def_regular = fdh->elf.def_regular;
6223 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6224 }
6225
6226 /* If this is a function code symbol, transfer dynamic linking
6227 information to the function descriptor symbol. */
6228 if (!fh->is_func)
6229 return TRUE;
6230
6231 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6232 if (ent->plt.refcount > 0)
6233 break;
6234 if (ent == NULL
6235 || fh->elf.root.root.string[0] != '.'
6236 || fh->elf.root.root.string[1] == '\0')
6237 return TRUE;
6238
6239 /* Find the corresponding function descriptor symbol. Create it
6240 as undefined if necessary. */
6241
6242 fdh = lookup_fdh (fh, htab);
6243 if (fdh == NULL
6244 && !info->executable
6245 && (fh->elf.root.type == bfd_link_hash_undefined
6246 || fh->elf.root.type == bfd_link_hash_undefweak))
6247 {
6248 fdh = make_fdh (info, fh);
6249 if (fdh == NULL)
6250 return FALSE;
6251 }
6252
6253 /* Fake function descriptors are made undefweak. If the function
6254 code symbol is strong undefined, make the fake sym the same.
6255 If the function code symbol is defined, then force the fake
6256 descriptor local; We can't support overriding of symbols in a
6257 shared library on a fake descriptor. */
6258
6259 if (fdh != NULL
6260 && fdh->fake
6261 && fdh->elf.root.type == bfd_link_hash_undefweak)
6262 {
6263 if (fh->elf.root.type == bfd_link_hash_undefined)
6264 {
6265 fdh->elf.root.type = bfd_link_hash_undefined;
6266 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6267 }
6268 else if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 {
6271 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6272 }
6273 }
6274
6275 if (fdh != NULL
6276 && !fdh->elf.forced_local
6277 && (!info->executable
6278 || fdh->elf.def_dynamic
6279 || fdh->elf.ref_dynamic
6280 || (fdh->elf.root.type == bfd_link_hash_undefweak
6281 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6282 {
6283 if (fdh->elf.dynindx == -1)
6284 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6285 return FALSE;
6286 fdh->elf.ref_regular |= fh->elf.ref_regular;
6287 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6288 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6289 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6290 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6291 {
6292 move_plt_plist (fh, fdh);
6293 fdh->elf.needs_plt = 1;
6294 }
6295 fdh->is_func_descriptor = 1;
6296 fdh->oh = fh;
6297 fh->oh = fdh;
6298 }
6299
6300 /* Now that the info is on the function descriptor, clear the
6301 function code sym info. Any function code syms for which we
6302 don't have a definition in a regular file, we force local.
6303 This prevents a shared library from exporting syms that have
6304 been imported from another library. Function code syms that
6305 are really in the library we must leave global to prevent the
6306 linker dragging in a definition from a static library. */
6307 force_local = (!fh->elf.def_regular
6308 || fdh == NULL
6309 || !fdh->elf.def_regular
6310 || fdh->elf.forced_local);
6311 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6312
6313 return TRUE;
6314 }
6315
6316 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6317 this hook to a) provide some gcc support functions, and b) transfer
6318 dynamic linking information gathered so far on function code symbol
6319 entries, to their corresponding function descriptor symbol entries. */
6320
6321 static bfd_boolean
6322 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6323 struct bfd_link_info *info)
6324 {
6325 struct ppc_link_hash_table *htab;
6326 unsigned int i;
6327 const struct sfpr_def_parms funcs[] =
6328 {
6329 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6330 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6331 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6332 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6333 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6334 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6335 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6336 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6337 { "._savef", 14, 31, savefpr, savefpr1_tail },
6338 { "._restf", 14, 31, restfpr, restfpr1_tail },
6339 { "_savevr_", 20, 31, savevr, savevr_tail },
6340 { "_restvr_", 20, 31, restvr, restvr_tail }
6341 };
6342
6343 htab = ppc_hash_table (info);
6344 if (htab == NULL)
6345 return FALSE;
6346
6347 if (htab->sfpr == NULL)
6348 /* We don't have any relocs. */
6349 return TRUE;
6350
6351 /* Provide any missing _save* and _rest* functions. */
6352 htab->sfpr->size = 0;
6353 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6354 if (!sfpr_define (info, &funcs[i]))
6355 return FALSE;
6356
6357 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6358
6359 if (htab->sfpr->size == 0)
6360 htab->sfpr->flags |= SEC_EXCLUDE;
6361
6362 return TRUE;
6363 }
6364
6365 /* Adjust a symbol defined by a dynamic object and referenced by a
6366 regular object. The current definition is in some section of the
6367 dynamic object, but we're not including those sections. We have to
6368 change the definition to something the rest of the link can
6369 understand. */
6370
6371 static bfd_boolean
6372 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6373 struct elf_link_hash_entry *h)
6374 {
6375 struct ppc_link_hash_table *htab;
6376 asection *s;
6377
6378 htab = ppc_hash_table (info);
6379 if (htab == NULL)
6380 return FALSE;
6381
6382 /* Deal with function syms. */
6383 if (h->type == STT_FUNC
6384 || h->type == STT_GNU_IFUNC
6385 || h->needs_plt)
6386 {
6387 /* Clear procedure linkage table information for any symbol that
6388 won't need a .plt entry. */
6389 struct plt_entry *ent;
6390 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6391 if (ent->plt.refcount > 0)
6392 break;
6393 if (ent == NULL
6394 || (h->type != STT_GNU_IFUNC
6395 && (SYMBOL_CALLS_LOCAL (info, h)
6396 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6397 && h->root.type == bfd_link_hash_undefweak))))
6398 {
6399 h->plt.plist = NULL;
6400 h->needs_plt = 0;
6401 }
6402 }
6403 else
6404 h->plt.plist = NULL;
6405
6406 /* If this is a weak symbol, and there is a real definition, the
6407 processor independent code will have arranged for us to see the
6408 real definition first, and we can just use the same value. */
6409 if (h->u.weakdef != NULL)
6410 {
6411 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6412 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6413 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6414 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6415 if (ELIMINATE_COPY_RELOCS)
6416 h->non_got_ref = h->u.weakdef->non_got_ref;
6417 return TRUE;
6418 }
6419
6420 /* If we are creating a shared library, we must presume that the
6421 only references to the symbol are via the global offset table.
6422 For such cases we need not do anything here; the relocations will
6423 be handled correctly by relocate_section. */
6424 if (info->shared)
6425 return TRUE;
6426
6427 /* If there are no references to this symbol that do not use the
6428 GOT, we don't need to generate a copy reloc. */
6429 if (!h->non_got_ref)
6430 return TRUE;
6431
6432 /* Don't generate a copy reloc for symbols defined in the executable. */
6433 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6434 return TRUE;
6435
6436 if (ELIMINATE_COPY_RELOCS)
6437 {
6438 struct ppc_link_hash_entry * eh;
6439 struct ppc_dyn_relocs *p;
6440
6441 eh = (struct ppc_link_hash_entry *) h;
6442 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6443 {
6444 s = p->sec->output_section;
6445 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6446 break;
6447 }
6448
6449 /* If we didn't find any dynamic relocs in read-only sections, then
6450 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6451 if (p == NULL)
6452 {
6453 h->non_got_ref = 0;
6454 return TRUE;
6455 }
6456 }
6457
6458 if (h->plt.plist != NULL)
6459 {
6460 /* We should never get here, but unfortunately there are versions
6461 of gcc out there that improperly (for this ABI) put initialized
6462 function pointers, vtable refs and suchlike in read-only
6463 sections. Allow them to proceed, but warn that this might
6464 break at runtime. */
6465 (*_bfd_error_handler)
6466 (_("copy reloc against `%s' requires lazy plt linking; "
6467 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6468 h->root.root.string);
6469 }
6470
6471 /* This is a reference to a symbol defined by a dynamic object which
6472 is not a function. */
6473
6474 if (h->size == 0)
6475 {
6476 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6477 h->root.root.string);
6478 return TRUE;
6479 }
6480
6481 /* We must allocate the symbol in our .dynbss section, which will
6482 become part of the .bss section of the executable. There will be
6483 an entry for this symbol in the .dynsym section. The dynamic
6484 object will contain position independent code, so all references
6485 from the dynamic object to this symbol will go through the global
6486 offset table. The dynamic linker will use the .dynsym entry to
6487 determine the address it must put in the global offset table, so
6488 both the dynamic object and the regular object will refer to the
6489 same memory location for the variable. */
6490
6491 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6492 to copy the initial value out of the dynamic object and into the
6493 runtime process image. We need to remember the offset into the
6494 .rela.bss section we are going to use. */
6495 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6496 {
6497 htab->relbss->size += sizeof (Elf64_External_Rela);
6498 h->needs_copy = 1;
6499 }
6500
6501 s = htab->dynbss;
6502
6503 return _bfd_elf_adjust_dynamic_copy (h, s);
6504 }
6505
6506 /* If given a function descriptor symbol, hide both the function code
6507 sym and the descriptor. */
6508 static void
6509 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6510 struct elf_link_hash_entry *h,
6511 bfd_boolean force_local)
6512 {
6513 struct ppc_link_hash_entry *eh;
6514 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6515
6516 eh = (struct ppc_link_hash_entry *) h;
6517 if (eh->is_func_descriptor)
6518 {
6519 struct ppc_link_hash_entry *fh = eh->oh;
6520
6521 if (fh == NULL)
6522 {
6523 const char *p, *q;
6524 struct ppc_link_hash_table *htab;
6525 char save;
6526
6527 /* We aren't supposed to use alloca in BFD because on
6528 systems which do not have alloca the version in libiberty
6529 calls xmalloc, which might cause the program to crash
6530 when it runs out of memory. This function doesn't have a
6531 return status, so there's no way to gracefully return an
6532 error. So cheat. We know that string[-1] can be safely
6533 accessed; It's either a string in an ELF string table,
6534 or allocated in an objalloc structure. */
6535
6536 p = eh->elf.root.root.string - 1;
6537 save = *p;
6538 *(char *) p = '.';
6539 htab = ppc_hash_table (info);
6540 if (htab == NULL)
6541 return;
6542
6543 fh = (struct ppc_link_hash_entry *)
6544 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6545 *(char *) p = save;
6546
6547 /* Unfortunately, if it so happens that the string we were
6548 looking for was allocated immediately before this string,
6549 then we overwrote the string terminator. That's the only
6550 reason the lookup should fail. */
6551 if (fh == NULL)
6552 {
6553 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6554 while (q >= eh->elf.root.root.string && *q == *p)
6555 --q, --p;
6556 if (q < eh->elf.root.root.string && *p == '.')
6557 fh = (struct ppc_link_hash_entry *)
6558 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6559 }
6560 if (fh != NULL)
6561 {
6562 eh->oh = fh;
6563 fh->oh = eh;
6564 }
6565 }
6566 if (fh != NULL)
6567 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6568 }
6569 }
6570
6571 static bfd_boolean
6572 get_sym_h (struct elf_link_hash_entry **hp,
6573 Elf_Internal_Sym **symp,
6574 asection **symsecp,
6575 unsigned char **tls_maskp,
6576 Elf_Internal_Sym **locsymsp,
6577 unsigned long r_symndx,
6578 bfd *ibfd)
6579 {
6580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6581
6582 if (r_symndx >= symtab_hdr->sh_info)
6583 {
6584 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6585 struct elf_link_hash_entry *h;
6586
6587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6588 h = elf_follow_link (h);
6589
6590 if (hp != NULL)
6591 *hp = h;
6592
6593 if (symp != NULL)
6594 *symp = NULL;
6595
6596 if (symsecp != NULL)
6597 {
6598 asection *symsec = NULL;
6599 if (h->root.type == bfd_link_hash_defined
6600 || h->root.type == bfd_link_hash_defweak)
6601 symsec = h->root.u.def.section;
6602 *symsecp = symsec;
6603 }
6604
6605 if (tls_maskp != NULL)
6606 {
6607 struct ppc_link_hash_entry *eh;
6608
6609 eh = (struct ppc_link_hash_entry *) h;
6610 *tls_maskp = &eh->tls_mask;
6611 }
6612 }
6613 else
6614 {
6615 Elf_Internal_Sym *sym;
6616 Elf_Internal_Sym *locsyms = *locsymsp;
6617
6618 if (locsyms == NULL)
6619 {
6620 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6621 if (locsyms == NULL)
6622 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6623 symtab_hdr->sh_info,
6624 0, NULL, NULL, NULL);
6625 if (locsyms == NULL)
6626 return FALSE;
6627 *locsymsp = locsyms;
6628 }
6629 sym = locsyms + r_symndx;
6630
6631 if (hp != NULL)
6632 *hp = NULL;
6633
6634 if (symp != NULL)
6635 *symp = sym;
6636
6637 if (symsecp != NULL)
6638 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6639
6640 if (tls_maskp != NULL)
6641 {
6642 struct got_entry **lgot_ents;
6643 unsigned char *tls_mask;
6644
6645 tls_mask = NULL;
6646 lgot_ents = elf_local_got_ents (ibfd);
6647 if (lgot_ents != NULL)
6648 {
6649 struct plt_entry **local_plt = (struct plt_entry **)
6650 (lgot_ents + symtab_hdr->sh_info);
6651 unsigned char *lgot_masks = (unsigned char *)
6652 (local_plt + symtab_hdr->sh_info);
6653 tls_mask = &lgot_masks[r_symndx];
6654 }
6655 *tls_maskp = tls_mask;
6656 }
6657 }
6658 return TRUE;
6659 }
6660
6661 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6662 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6663 type suitable for optimization, and 1 otherwise. */
6664
6665 static int
6666 get_tls_mask (unsigned char **tls_maskp,
6667 unsigned long *toc_symndx,
6668 bfd_vma *toc_addend,
6669 Elf_Internal_Sym **locsymsp,
6670 const Elf_Internal_Rela *rel,
6671 bfd *ibfd)
6672 {
6673 unsigned long r_symndx;
6674 int next_r;
6675 struct elf_link_hash_entry *h;
6676 Elf_Internal_Sym *sym;
6677 asection *sec;
6678 bfd_vma off;
6679
6680 r_symndx = ELF64_R_SYM (rel->r_info);
6681 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6682 return 0;
6683
6684 if ((*tls_maskp != NULL && **tls_maskp != 0)
6685 || sec == NULL
6686 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6687 return 1;
6688
6689 /* Look inside a TOC section too. */
6690 if (h != NULL)
6691 {
6692 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6693 off = h->root.u.def.value;
6694 }
6695 else
6696 off = sym->st_value;
6697 off += rel->r_addend;
6698 BFD_ASSERT (off % 8 == 0);
6699 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6700 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6701 if (toc_symndx != NULL)
6702 *toc_symndx = r_symndx;
6703 if (toc_addend != NULL)
6704 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6705 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6706 return 0;
6707 if ((h == NULL
6708 || ((h->root.type == bfd_link_hash_defined
6709 || h->root.type == bfd_link_hash_defweak)
6710 && !h->def_dynamic))
6711 && (next_r == -1 || next_r == -2))
6712 return 1 - next_r;
6713 return 1;
6714 }
6715
6716 /* Adjust all global syms defined in opd sections. In gcc generated
6717 code for the old ABI, these will already have been done. */
6718
6719 static bfd_boolean
6720 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6721 {
6722 struct ppc_link_hash_entry *eh;
6723 asection *sym_sec;
6724 struct _opd_sec_data *opd;
6725
6726 if (h->root.type == bfd_link_hash_indirect)
6727 return TRUE;
6728
6729 if (h->root.type == bfd_link_hash_warning)
6730 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6731
6732 if (h->root.type != bfd_link_hash_defined
6733 && h->root.type != bfd_link_hash_defweak)
6734 return TRUE;
6735
6736 eh = (struct ppc_link_hash_entry *) h;
6737 if (eh->adjust_done)
6738 return TRUE;
6739
6740 sym_sec = eh->elf.root.u.def.section;
6741 opd = get_opd_info (sym_sec);
6742 if (opd != NULL && opd->adjust != NULL)
6743 {
6744 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6745 if (adjust == -1)
6746 {
6747 /* This entry has been deleted. */
6748 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6749 if (dsec == NULL)
6750 {
6751 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6752 if (elf_discarded_section (dsec))
6753 {
6754 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6755 break;
6756 }
6757 }
6758 eh->elf.root.u.def.value = 0;
6759 eh->elf.root.u.def.section = dsec;
6760 }
6761 else
6762 eh->elf.root.u.def.value += adjust;
6763 eh->adjust_done = 1;
6764 }
6765 return TRUE;
6766 }
6767
6768 /* Handles decrementing dynamic reloc counts for the reloc specified by
6769 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6770 have already been determined. */
6771
6772 static bfd_boolean
6773 dec_dynrel_count (bfd_vma r_info,
6774 asection *sec,
6775 struct bfd_link_info *info,
6776 Elf_Internal_Sym **local_syms,
6777 struct elf_link_hash_entry *h,
6778 asection *sym_sec)
6779 {
6780 enum elf_ppc64_reloc_type r_type;
6781 struct ppc_dyn_relocs *p;
6782 struct ppc_dyn_relocs **pp;
6783
6784 /* Can this reloc be dynamic? This switch, and later tests here
6785 should be kept in sync with the code in check_relocs. */
6786 r_type = ELF64_R_TYPE (r_info);
6787 switch (r_type)
6788 {
6789 default:
6790 return TRUE;
6791
6792 case R_PPC64_TPREL16:
6793 case R_PPC64_TPREL16_LO:
6794 case R_PPC64_TPREL16_HI:
6795 case R_PPC64_TPREL16_HA:
6796 case R_PPC64_TPREL16_DS:
6797 case R_PPC64_TPREL16_LO_DS:
6798 case R_PPC64_TPREL16_HIGHER:
6799 case R_PPC64_TPREL16_HIGHERA:
6800 case R_PPC64_TPREL16_HIGHEST:
6801 case R_PPC64_TPREL16_HIGHESTA:
6802 if (!info->shared)
6803 return TRUE;
6804
6805 case R_PPC64_TPREL64:
6806 case R_PPC64_DTPMOD64:
6807 case R_PPC64_DTPREL64:
6808 case R_PPC64_ADDR64:
6809 case R_PPC64_REL30:
6810 case R_PPC64_REL32:
6811 case R_PPC64_REL64:
6812 case R_PPC64_ADDR14:
6813 case R_PPC64_ADDR14_BRNTAKEN:
6814 case R_PPC64_ADDR14_BRTAKEN:
6815 case R_PPC64_ADDR16:
6816 case R_PPC64_ADDR16_DS:
6817 case R_PPC64_ADDR16_HA:
6818 case R_PPC64_ADDR16_HI:
6819 case R_PPC64_ADDR16_HIGHER:
6820 case R_PPC64_ADDR16_HIGHERA:
6821 case R_PPC64_ADDR16_HIGHEST:
6822 case R_PPC64_ADDR16_HIGHESTA:
6823 case R_PPC64_ADDR16_LO:
6824 case R_PPC64_ADDR16_LO_DS:
6825 case R_PPC64_ADDR24:
6826 case R_PPC64_ADDR32:
6827 case R_PPC64_UADDR16:
6828 case R_PPC64_UADDR32:
6829 case R_PPC64_UADDR64:
6830 case R_PPC64_TOC:
6831 break;
6832 }
6833
6834 if (local_syms != NULL)
6835 {
6836 unsigned long r_symndx;
6837 Elf_Internal_Sym *sym;
6838 bfd *ibfd = sec->owner;
6839
6840 r_symndx = ELF64_R_SYM (r_info);
6841 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6842 return FALSE;
6843 }
6844
6845 if ((info->shared
6846 && (must_be_dyn_reloc (info, r_type)
6847 || (h != NULL
6848 && (!info->symbolic
6849 || h->root.type == bfd_link_hash_defweak
6850 || !h->def_regular))))
6851 || (ELIMINATE_COPY_RELOCS
6852 && !info->shared
6853 && h != NULL
6854 && (h->root.type == bfd_link_hash_defweak
6855 || !h->def_regular)))
6856 ;
6857 else
6858 return TRUE;
6859
6860 if (h != NULL)
6861 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6862 else
6863 {
6864 if (sym_sec != NULL)
6865 {
6866 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6867 pp = (struct ppc_dyn_relocs **) vpp;
6868 }
6869 else
6870 {
6871 void *vpp = &elf_section_data (sec)->local_dynrel;
6872 pp = (struct ppc_dyn_relocs **) vpp;
6873 }
6874
6875 /* elf_gc_sweep may have already removed all dyn relocs associated
6876 with local syms for a given section. Don't report a dynreloc
6877 miscount. */
6878 if (*pp == NULL)
6879 return TRUE;
6880 }
6881
6882 while ((p = *pp) != NULL)
6883 {
6884 if (p->sec == sec)
6885 {
6886 if (!must_be_dyn_reloc (info, r_type))
6887 p->pc_count -= 1;
6888 p->count -= 1;
6889 if (p->count == 0)
6890 *pp = p->next;
6891 return TRUE;
6892 }
6893 pp = &p->next;
6894 }
6895
6896 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6897 sec->owner, sec);
6898 bfd_set_error (bfd_error_bad_value);
6899 return FALSE;
6900 }
6901
6902 /* Remove unused Official Procedure Descriptor entries. Currently we
6903 only remove those associated with functions in discarded link-once
6904 sections, or weakly defined functions that have been overridden. It
6905 would be possible to remove many more entries for statically linked
6906 applications. */
6907
6908 bfd_boolean
6909 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6910 {
6911 bfd *ibfd;
6912 bfd_boolean some_edited = FALSE;
6913 asection *need_pad = NULL;
6914
6915 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6916 {
6917 asection *sec;
6918 Elf_Internal_Rela *relstart, *rel, *relend;
6919 Elf_Internal_Shdr *symtab_hdr;
6920 Elf_Internal_Sym *local_syms;
6921 struct elf_link_hash_entry **sym_hashes;
6922 bfd_vma offset;
6923 struct _opd_sec_data *opd;
6924 bfd_boolean need_edit, add_aux_fields;
6925 bfd_size_type cnt_16b = 0;
6926
6927 sec = bfd_get_section_by_name (ibfd, ".opd");
6928 if (sec == NULL || sec->size == 0)
6929 continue;
6930
6931 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6932 continue;
6933
6934 if (sec->output_section == bfd_abs_section_ptr)
6935 continue;
6936
6937 /* Look through the section relocs. */
6938 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6939 continue;
6940
6941 local_syms = NULL;
6942 symtab_hdr = &elf_symtab_hdr (ibfd);
6943 sym_hashes = elf_sym_hashes (ibfd);
6944
6945 /* Read the relocations. */
6946 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6947 info->keep_memory);
6948 if (relstart == NULL)
6949 return FALSE;
6950
6951 /* First run through the relocs to check they are sane, and to
6952 determine whether we need to edit this opd section. */
6953 need_edit = FALSE;
6954 need_pad = sec;
6955 offset = 0;
6956 relend = relstart + sec->reloc_count;
6957 for (rel = relstart; rel < relend; )
6958 {
6959 enum elf_ppc64_reloc_type r_type;
6960 unsigned long r_symndx;
6961 asection *sym_sec;
6962 struct elf_link_hash_entry *h;
6963 Elf_Internal_Sym *sym;
6964
6965 /* .opd contains a regular array of 16 or 24 byte entries. We're
6966 only interested in the reloc pointing to a function entry
6967 point. */
6968 if (rel->r_offset != offset
6969 || rel + 1 >= relend
6970 || (rel + 1)->r_offset != offset + 8)
6971 {
6972 /* If someone messes with .opd alignment then after a
6973 "ld -r" we might have padding in the middle of .opd.
6974 Also, there's nothing to prevent someone putting
6975 something silly in .opd with the assembler. No .opd
6976 optimization for them! */
6977 broken_opd:
6978 (*_bfd_error_handler)
6979 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6980 need_edit = FALSE;
6981 break;
6982 }
6983
6984 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6985 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6986 {
6987 (*_bfd_error_handler)
6988 (_("%B: unexpected reloc type %u in .opd section"),
6989 ibfd, r_type);
6990 need_edit = FALSE;
6991 break;
6992 }
6993
6994 r_symndx = ELF64_R_SYM (rel->r_info);
6995 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6996 r_symndx, ibfd))
6997 goto error_ret;
6998
6999 if (sym_sec == NULL || sym_sec->owner == NULL)
7000 {
7001 const char *sym_name;
7002 if (h != NULL)
7003 sym_name = h->root.root.string;
7004 else
7005 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7006 sym_sec);
7007
7008 (*_bfd_error_handler)
7009 (_("%B: undefined sym `%s' in .opd section"),
7010 ibfd, sym_name);
7011 need_edit = FALSE;
7012 break;
7013 }
7014
7015 /* opd entries are always for functions defined in the
7016 current input bfd. If the symbol isn't defined in the
7017 input bfd, then we won't be using the function in this
7018 bfd; It must be defined in a linkonce section in another
7019 bfd, or is weak. It's also possible that we are
7020 discarding the function due to a linker script /DISCARD/,
7021 which we test for via the output_section. */
7022 if (sym_sec->owner != ibfd
7023 || sym_sec->output_section == bfd_abs_section_ptr)
7024 need_edit = TRUE;
7025
7026 rel += 2;
7027 if (rel == relend
7028 || (rel + 1 == relend && rel->r_offset == offset + 16))
7029 {
7030 if (sec->size == offset + 24)
7031 {
7032 need_pad = NULL;
7033 break;
7034 }
7035 if (rel == relend && sec->size == offset + 16)
7036 {
7037 cnt_16b++;
7038 break;
7039 }
7040 goto broken_opd;
7041 }
7042
7043 if (rel->r_offset == offset + 24)
7044 offset += 24;
7045 else if (rel->r_offset != offset + 16)
7046 goto broken_opd;
7047 else if (rel + 1 < relend
7048 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7049 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7050 {
7051 offset += 16;
7052 cnt_16b++;
7053 }
7054 else if (rel + 2 < relend
7055 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7056 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7057 {
7058 offset += 24;
7059 rel += 1;
7060 }
7061 else
7062 goto broken_opd;
7063 }
7064
7065 add_aux_fields = non_overlapping && cnt_16b > 0;
7066
7067 if (need_edit || add_aux_fields)
7068 {
7069 Elf_Internal_Rela *write_rel;
7070 bfd_byte *rptr, *wptr;
7071 bfd_byte *new_contents;
7072 bfd_boolean skip;
7073 long opd_ent_size;
7074 bfd_size_type amt;
7075
7076 new_contents = NULL;
7077 amt = sec->size * sizeof (long) / 8;
7078 opd = &ppc64_elf_section_data (sec)->u.opd;
7079 opd->adjust = bfd_zalloc (sec->owner, amt);
7080 if (opd->adjust == NULL)
7081 return FALSE;
7082 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7083
7084 /* This seems a waste of time as input .opd sections are all
7085 zeros as generated by gcc, but I suppose there's no reason
7086 this will always be so. We might start putting something in
7087 the third word of .opd entries. */
7088 if ((sec->flags & SEC_IN_MEMORY) == 0)
7089 {
7090 bfd_byte *loc;
7091 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7092 {
7093 if (loc != NULL)
7094 free (loc);
7095 error_ret:
7096 if (local_syms != NULL
7097 && symtab_hdr->contents != (unsigned char *) local_syms)
7098 free (local_syms);
7099 if (elf_section_data (sec)->relocs != relstart)
7100 free (relstart);
7101 return FALSE;
7102 }
7103 sec->contents = loc;
7104 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7105 }
7106
7107 elf_section_data (sec)->relocs = relstart;
7108
7109 new_contents = sec->contents;
7110 if (add_aux_fields)
7111 {
7112 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7113 if (new_contents == NULL)
7114 return FALSE;
7115 need_pad = FALSE;
7116 }
7117 wptr = new_contents;
7118 rptr = sec->contents;
7119
7120 write_rel = relstart;
7121 skip = FALSE;
7122 offset = 0;
7123 opd_ent_size = 0;
7124 for (rel = relstart; rel < relend; rel++)
7125 {
7126 unsigned long r_symndx;
7127 asection *sym_sec;
7128 struct elf_link_hash_entry *h;
7129 Elf_Internal_Sym *sym;
7130
7131 r_symndx = ELF64_R_SYM (rel->r_info);
7132 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7133 r_symndx, ibfd))
7134 goto error_ret;
7135
7136 if (rel->r_offset == offset)
7137 {
7138 struct ppc_link_hash_entry *fdh = NULL;
7139
7140 /* See if the .opd entry is full 24 byte or
7141 16 byte (with fd_aux entry overlapped with next
7142 fd_func). */
7143 opd_ent_size = 24;
7144 if ((rel + 2 == relend && sec->size == offset + 16)
7145 || (rel + 3 < relend
7146 && rel[2].r_offset == offset + 16
7147 && rel[3].r_offset == offset + 24
7148 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7149 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7150 opd_ent_size = 16;
7151
7152 if (h != NULL
7153 && h->root.root.string[0] == '.')
7154 {
7155 struct ppc_link_hash_table *htab;
7156
7157 htab = ppc_hash_table (info);
7158 if (htab != NULL)
7159 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7160 htab);
7161 if (fdh != NULL
7162 && fdh->elf.root.type != bfd_link_hash_defined
7163 && fdh->elf.root.type != bfd_link_hash_defweak)
7164 fdh = NULL;
7165 }
7166
7167 skip = (sym_sec->owner != ibfd
7168 || sym_sec->output_section == bfd_abs_section_ptr);
7169 if (skip)
7170 {
7171 if (fdh != NULL && sym_sec->owner == ibfd)
7172 {
7173 /* Arrange for the function descriptor sym
7174 to be dropped. */
7175 fdh->elf.root.u.def.value = 0;
7176 fdh->elf.root.u.def.section = sym_sec;
7177 }
7178 opd->adjust[rel->r_offset / 8] = -1;
7179 }
7180 else
7181 {
7182 /* We'll be keeping this opd entry. */
7183
7184 if (fdh != NULL)
7185 {
7186 /* Redefine the function descriptor symbol to
7187 this location in the opd section. It is
7188 necessary to update the value here rather
7189 than using an array of adjustments as we do
7190 for local symbols, because various places
7191 in the generic ELF code use the value
7192 stored in u.def.value. */
7193 fdh->elf.root.u.def.value = wptr - new_contents;
7194 fdh->adjust_done = 1;
7195 }
7196
7197 /* Local syms are a bit tricky. We could
7198 tweak them as they can be cached, but
7199 we'd need to look through the local syms
7200 for the function descriptor sym which we
7201 don't have at the moment. So keep an
7202 array of adjustments. */
7203 opd->adjust[rel->r_offset / 8]
7204 = (wptr - new_contents) - (rptr - sec->contents);
7205
7206 if (wptr != rptr)
7207 memcpy (wptr, rptr, opd_ent_size);
7208 wptr += opd_ent_size;
7209 if (add_aux_fields && opd_ent_size == 16)
7210 {
7211 memset (wptr, '\0', 8);
7212 wptr += 8;
7213 }
7214 }
7215 rptr += opd_ent_size;
7216 offset += opd_ent_size;
7217 }
7218
7219 if (skip)
7220 {
7221 if (!NO_OPD_RELOCS
7222 && !info->relocatable
7223 && !dec_dynrel_count (rel->r_info, sec, info,
7224 NULL, h, sym_sec))
7225 goto error_ret;
7226 }
7227 else
7228 {
7229 /* We need to adjust any reloc offsets to point to the
7230 new opd entries. While we're at it, we may as well
7231 remove redundant relocs. */
7232 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7233 if (write_rel != rel)
7234 memcpy (write_rel, rel, sizeof (*rel));
7235 ++write_rel;
7236 }
7237 }
7238
7239 sec->size = wptr - new_contents;
7240 sec->reloc_count = write_rel - relstart;
7241 if (add_aux_fields)
7242 {
7243 free (sec->contents);
7244 sec->contents = new_contents;
7245 }
7246
7247 /* Fudge the header size too, as this is used later in
7248 elf_bfd_final_link if we are emitting relocs. */
7249 elf_section_data (sec)->rel_hdr.sh_size
7250 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7251 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7252 some_edited = TRUE;
7253 }
7254 else if (elf_section_data (sec)->relocs != relstart)
7255 free (relstart);
7256
7257 if (local_syms != NULL
7258 && symtab_hdr->contents != (unsigned char *) local_syms)
7259 {
7260 if (!info->keep_memory)
7261 free (local_syms);
7262 else
7263 symtab_hdr->contents = (unsigned char *) local_syms;
7264 }
7265 }
7266
7267 if (some_edited)
7268 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7269
7270 /* If we are doing a final link and the last .opd entry is just 16 byte
7271 long, add a 8 byte padding after it. */
7272 if (need_pad != NULL && !info->relocatable)
7273 {
7274 bfd_byte *p;
7275
7276 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7277 {
7278 BFD_ASSERT (need_pad->size > 0);
7279
7280 p = bfd_malloc (need_pad->size + 8);
7281 if (p == NULL)
7282 return FALSE;
7283
7284 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7285 p, 0, need_pad->size))
7286 return FALSE;
7287
7288 need_pad->contents = p;
7289 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7290 }
7291 else
7292 {
7293 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7294 if (p == NULL)
7295 return FALSE;
7296
7297 need_pad->contents = p;
7298 }
7299
7300 memset (need_pad->contents + need_pad->size, 0, 8);
7301 need_pad->size += 8;
7302 }
7303
7304 return TRUE;
7305 }
7306
7307 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7308
7309 asection *
7310 ppc64_elf_tls_setup (struct bfd_link_info *info,
7311 int no_tls_get_addr_opt,
7312 int *no_multi_toc)
7313 {
7314 struct ppc_link_hash_table *htab;
7315
7316 htab = ppc_hash_table (info);
7317 if (htab == NULL)
7318 return NULL;
7319
7320 if (*no_multi_toc)
7321 htab->do_multi_toc = 0;
7322 else if (!htab->do_multi_toc)
7323 *no_multi_toc = 1;
7324
7325 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7326 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7327 FALSE, FALSE, TRUE));
7328 /* Move dynamic linking info to the function descriptor sym. */
7329 if (htab->tls_get_addr != NULL)
7330 func_desc_adjust (&htab->tls_get_addr->elf, info);
7331 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7332 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7333 FALSE, FALSE, TRUE));
7334 if (!no_tls_get_addr_opt)
7335 {
7336 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7337
7338 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7339 FALSE, FALSE, TRUE);
7340 if (opt != NULL)
7341 func_desc_adjust (opt, info);
7342 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7343 FALSE, FALSE, TRUE);
7344 if (opt_fd != NULL
7345 && (opt_fd->root.type == bfd_link_hash_defined
7346 || opt_fd->root.type == bfd_link_hash_defweak))
7347 {
7348 /* If glibc supports an optimized __tls_get_addr call stub,
7349 signalled by the presence of __tls_get_addr_opt, and we'll
7350 be calling __tls_get_addr via a plt call stub, then
7351 make __tls_get_addr point to __tls_get_addr_opt. */
7352 tga_fd = &htab->tls_get_addr_fd->elf;
7353 if (htab->elf.dynamic_sections_created
7354 && tga_fd != NULL
7355 && (tga_fd->type == STT_FUNC
7356 || tga_fd->needs_plt)
7357 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7358 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7359 && tga_fd->root.type == bfd_link_hash_undefweak)))
7360 {
7361 struct plt_entry *ent;
7362
7363 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7364 if (ent->plt.refcount > 0)
7365 break;
7366 if (ent != NULL)
7367 {
7368 tga_fd->root.type = bfd_link_hash_indirect;
7369 tga_fd->root.u.i.link = &opt_fd->root;
7370 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7371 if (opt_fd->dynindx != -1)
7372 {
7373 /* Use __tls_get_addr_opt in dynamic relocations. */
7374 opt_fd->dynindx = -1;
7375 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7376 opt_fd->dynstr_index);
7377 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7378 return FALSE;
7379 }
7380 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7381 tga = &htab->tls_get_addr->elf;
7382 if (opt != NULL && tga != NULL)
7383 {
7384 tga->root.type = bfd_link_hash_indirect;
7385 tga->root.u.i.link = &opt->root;
7386 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7387 _bfd_elf_link_hash_hide_symbol (info, opt,
7388 tga->forced_local);
7389 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7390 }
7391 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7392 htab->tls_get_addr_fd->is_func_descriptor = 1;
7393 if (htab->tls_get_addr != NULL)
7394 {
7395 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7396 htab->tls_get_addr->is_func = 1;
7397 }
7398 }
7399 }
7400 }
7401 else
7402 no_tls_get_addr_opt = TRUE;
7403 }
7404 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7405 return _bfd_elf_tls_setup (info->output_bfd, info);
7406 }
7407
7408 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7409 HASH1 or HASH2. */
7410
7411 static bfd_boolean
7412 branch_reloc_hash_match (const bfd *ibfd,
7413 const Elf_Internal_Rela *rel,
7414 const struct ppc_link_hash_entry *hash1,
7415 const struct ppc_link_hash_entry *hash2)
7416 {
7417 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7418 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7419 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7420
7421 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7422 {
7423 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7424 struct elf_link_hash_entry *h;
7425
7426 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7427 h = elf_follow_link (h);
7428 if (h == &hash1->elf || h == &hash2->elf)
7429 return TRUE;
7430 }
7431 return FALSE;
7432 }
7433
7434 /* Run through all the TLS relocs looking for optimization
7435 opportunities. The linker has been hacked (see ppc64elf.em) to do
7436 a preliminary section layout so that we know the TLS segment
7437 offsets. We can't optimize earlier because some optimizations need
7438 to know the tp offset, and we need to optimize before allocating
7439 dynamic relocations. */
7440
7441 bfd_boolean
7442 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7443 {
7444 bfd *ibfd;
7445 asection *sec;
7446 struct ppc_link_hash_table *htab;
7447 int pass;
7448
7449 if (info->relocatable || !info->executable)
7450 return TRUE;
7451
7452 htab = ppc_hash_table (info);
7453 if (htab == NULL)
7454 return FALSE;
7455
7456 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7457 {
7458 Elf_Internal_Sym *locsyms = NULL;
7459 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7460 unsigned char *toc_ref = NULL;
7461
7462 /* Look at all the sections for this file. Make two passes over
7463 the relocs. On the first pass, mark toc entries involved
7464 with tls relocs, and check that tls relocs involved in
7465 setting up a tls_get_addr call are indeed followed by such a
7466 call. If they are not, exclude them from the optimizations
7467 done on the second pass. */
7468 for (pass = 0; pass < 2; ++pass)
7469 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7470 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7471 {
7472 Elf_Internal_Rela *relstart, *rel, *relend;
7473
7474 /* Read the relocations. */
7475 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7476 info->keep_memory);
7477 if (relstart == NULL)
7478 return FALSE;
7479
7480 relend = relstart + sec->reloc_count;
7481 for (rel = relstart; rel < relend; rel++)
7482 {
7483 enum elf_ppc64_reloc_type r_type;
7484 unsigned long r_symndx;
7485 struct elf_link_hash_entry *h;
7486 Elf_Internal_Sym *sym;
7487 asection *sym_sec;
7488 unsigned char *tls_mask;
7489 unsigned char tls_set, tls_clear, tls_type = 0;
7490 bfd_vma value;
7491 bfd_boolean ok_tprel, is_local;
7492 long toc_ref_index = 0;
7493 int expecting_tls_get_addr = 0;
7494
7495 r_symndx = ELF64_R_SYM (rel->r_info);
7496 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7497 r_symndx, ibfd))
7498 {
7499 err_free_rel:
7500 if (elf_section_data (sec)->relocs != relstart)
7501 free (relstart);
7502 if (toc_ref != NULL)
7503 free (toc_ref);
7504 if (locsyms != NULL
7505 && (elf_symtab_hdr (ibfd).contents
7506 != (unsigned char *) locsyms))
7507 free (locsyms);
7508 return FALSE;
7509 }
7510
7511 if (h != NULL)
7512 {
7513 if (h->root.type == bfd_link_hash_defined
7514 || h->root.type == bfd_link_hash_defweak)
7515 value = h->root.u.def.value;
7516 else if (h->root.type == bfd_link_hash_undefweak)
7517 value = 0;
7518 else
7519 continue;
7520 }
7521 else
7522 /* Symbols referenced by TLS relocs must be of type
7523 STT_TLS. So no need for .opd local sym adjust. */
7524 value = sym->st_value;
7525
7526 ok_tprel = FALSE;
7527 is_local = FALSE;
7528 if (h == NULL
7529 || !h->def_dynamic)
7530 {
7531 is_local = TRUE;
7532 if (h != NULL
7533 && h->root.type == bfd_link_hash_undefweak)
7534 ok_tprel = TRUE;
7535 else
7536 {
7537 value += sym_sec->output_offset;
7538 value += sym_sec->output_section->vma;
7539 value -= htab->elf.tls_sec->vma;
7540 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7541 < (bfd_vma) 1 << 32);
7542 }
7543 }
7544
7545 r_type = ELF64_R_TYPE (rel->r_info);
7546 switch (r_type)
7547 {
7548 case R_PPC64_GOT_TLSLD16:
7549 case R_PPC64_GOT_TLSLD16_LO:
7550 expecting_tls_get_addr = 1;
7551 /* Fall thru */
7552
7553 case R_PPC64_GOT_TLSLD16_HI:
7554 case R_PPC64_GOT_TLSLD16_HA:
7555 /* These relocs should never be against a symbol
7556 defined in a shared lib. Leave them alone if
7557 that turns out to be the case. */
7558 if (!is_local)
7559 continue;
7560
7561 /* LD -> LE */
7562 tls_set = 0;
7563 tls_clear = TLS_LD;
7564 tls_type = TLS_TLS | TLS_LD;
7565 break;
7566
7567 case R_PPC64_GOT_TLSGD16:
7568 case R_PPC64_GOT_TLSGD16_LO:
7569 expecting_tls_get_addr = 1;
7570 /* Fall thru */
7571
7572 case R_PPC64_GOT_TLSGD16_HI:
7573 case R_PPC64_GOT_TLSGD16_HA:
7574 if (ok_tprel)
7575 /* GD -> LE */
7576 tls_set = 0;
7577 else
7578 /* GD -> IE */
7579 tls_set = TLS_TLS | TLS_TPRELGD;
7580 tls_clear = TLS_GD;
7581 tls_type = TLS_TLS | TLS_GD;
7582 break;
7583
7584 case R_PPC64_GOT_TPREL16_DS:
7585 case R_PPC64_GOT_TPREL16_LO_DS:
7586 case R_PPC64_GOT_TPREL16_HI:
7587 case R_PPC64_GOT_TPREL16_HA:
7588 if (ok_tprel)
7589 {
7590 /* IE -> LE */
7591 tls_set = 0;
7592 tls_clear = TLS_TPREL;
7593 tls_type = TLS_TLS | TLS_TPREL;
7594 break;
7595 }
7596 continue;
7597
7598 case R_PPC64_TOC16:
7599 case R_PPC64_TOC16_LO:
7600 case R_PPC64_TLS:
7601 case R_PPC64_TLSGD:
7602 case R_PPC64_TLSLD:
7603 if (sym_sec == NULL || sym_sec != toc)
7604 continue;
7605
7606 /* Mark this toc entry as referenced by a TLS
7607 code sequence. We can do that now in the
7608 case of R_PPC64_TLS, and after checking for
7609 tls_get_addr for the TOC16 relocs. */
7610 if (toc_ref == NULL)
7611 {
7612 toc_ref = bfd_zmalloc (toc->size / 8);
7613 if (toc_ref == NULL)
7614 goto err_free_rel;
7615 }
7616 if (h != NULL)
7617 value = h->root.u.def.value;
7618 else
7619 value = sym->st_value;
7620 value += rel->r_addend;
7621 BFD_ASSERT (value < toc->size && value % 8 == 0);
7622 toc_ref_index = value / 8;
7623 if (r_type == R_PPC64_TLS
7624 || r_type == R_PPC64_TLSGD
7625 || r_type == R_PPC64_TLSLD)
7626 {
7627 toc_ref[toc_ref_index] = 1;
7628 continue;
7629 }
7630
7631 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7632 continue;
7633
7634 tls_set = 0;
7635 tls_clear = 0;
7636 expecting_tls_get_addr = 2;
7637 break;
7638
7639 case R_PPC64_TPREL64:
7640 if (pass == 0
7641 || sec != toc
7642 || toc_ref == NULL
7643 || !toc_ref[rel->r_offset / 8])
7644 continue;
7645 if (ok_tprel)
7646 {
7647 /* IE -> LE */
7648 tls_set = TLS_EXPLICIT;
7649 tls_clear = TLS_TPREL;
7650 break;
7651 }
7652 continue;
7653
7654 case R_PPC64_DTPMOD64:
7655 if (pass == 0
7656 || sec != toc
7657 || toc_ref == NULL
7658 || !toc_ref[rel->r_offset / 8])
7659 continue;
7660 if (rel + 1 < relend
7661 && (rel[1].r_info
7662 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7663 && rel[1].r_offset == rel->r_offset + 8)
7664 {
7665 if (ok_tprel)
7666 /* GD -> LE */
7667 tls_set = TLS_EXPLICIT | TLS_GD;
7668 else
7669 /* GD -> IE */
7670 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7671 tls_clear = TLS_GD;
7672 }
7673 else
7674 {
7675 if (!is_local)
7676 continue;
7677
7678 /* LD -> LE */
7679 tls_set = TLS_EXPLICIT;
7680 tls_clear = TLS_LD;
7681 }
7682 break;
7683
7684 default:
7685 continue;
7686 }
7687
7688 if (pass == 0)
7689 {
7690 if (!expecting_tls_get_addr
7691 || !sec->has_tls_get_addr_call)
7692 continue;
7693
7694 if (rel + 1 < relend
7695 && branch_reloc_hash_match (ibfd, rel + 1,
7696 htab->tls_get_addr,
7697 htab->tls_get_addr_fd))
7698 {
7699 if (expecting_tls_get_addr == 2)
7700 {
7701 /* Check for toc tls entries. */
7702 unsigned char *toc_tls;
7703 int retval;
7704
7705 retval = get_tls_mask (&toc_tls, NULL, NULL,
7706 &locsyms,
7707 rel, ibfd);
7708 if (retval == 0)
7709 goto err_free_rel;
7710 if (retval > 1 && toc_tls != NULL)
7711 toc_ref[toc_ref_index] = 1;
7712 }
7713 continue;
7714 }
7715
7716 if (expecting_tls_get_addr != 1)
7717 continue;
7718
7719 /* Uh oh, we didn't find the expected call. We
7720 could just mark this symbol to exclude it
7721 from tls optimization but it's safer to skip
7722 the entire section. */
7723 sec->has_tls_reloc = 0;
7724 break;
7725 }
7726
7727 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7728 {
7729 struct plt_entry *ent;
7730 for (ent = htab->tls_get_addr->elf.plt.plist;
7731 ent != NULL;
7732 ent = ent->next)
7733 if (ent->addend == 0)
7734 {
7735 if (ent->plt.refcount > 0)
7736 {
7737 ent->plt.refcount -= 1;
7738 expecting_tls_get_addr = 0;
7739 }
7740 break;
7741 }
7742 }
7743
7744 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7745 {
7746 struct plt_entry *ent;
7747 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7748 ent != NULL;
7749 ent = ent->next)
7750 if (ent->addend == 0)
7751 {
7752 if (ent->plt.refcount > 0)
7753 ent->plt.refcount -= 1;
7754 break;
7755 }
7756 }
7757
7758 if (tls_clear == 0)
7759 continue;
7760
7761 if ((tls_set & TLS_EXPLICIT) == 0)
7762 {
7763 struct got_entry *ent;
7764
7765 /* Adjust got entry for this reloc. */
7766 if (h != NULL)
7767 ent = h->got.glist;
7768 else
7769 ent = elf_local_got_ents (ibfd)[r_symndx];
7770
7771 for (; ent != NULL; ent = ent->next)
7772 if (ent->addend == rel->r_addend
7773 && ent->owner == ibfd
7774 && ent->tls_type == tls_type)
7775 break;
7776 if (ent == NULL)
7777 abort ();
7778
7779 if (tls_set == 0)
7780 {
7781 /* We managed to get rid of a got entry. */
7782 if (ent->got.refcount > 0)
7783 ent->got.refcount -= 1;
7784 }
7785 }
7786 else
7787 {
7788 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7789 we'll lose one or two dyn relocs. */
7790 if (!dec_dynrel_count (rel->r_info, sec, info,
7791 NULL, h, sym_sec))
7792 return FALSE;
7793
7794 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7795 {
7796 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7797 NULL, h, sym_sec))
7798 return FALSE;
7799 }
7800 }
7801
7802 *tls_mask |= tls_set;
7803 *tls_mask &= ~tls_clear;
7804 }
7805
7806 if (elf_section_data (sec)->relocs != relstart)
7807 free (relstart);
7808 }
7809
7810 if (toc_ref != NULL)
7811 free (toc_ref);
7812
7813 if (locsyms != NULL
7814 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7815 {
7816 if (!info->keep_memory)
7817 free (locsyms);
7818 else
7819 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7820 }
7821 }
7822 return TRUE;
7823 }
7824
7825 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7826 the values of any global symbols in a toc section that has been
7827 edited. Globals in toc sections should be a rarity, so this function
7828 sets a flag if any are found in toc sections other than the one just
7829 edited, so that futher hash table traversals can be avoided. */
7830
7831 struct adjust_toc_info
7832 {
7833 asection *toc;
7834 unsigned long *skip;
7835 bfd_boolean global_toc_syms;
7836 };
7837
7838 static bfd_boolean
7839 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7840 {
7841 struct ppc_link_hash_entry *eh;
7842 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7843
7844 if (h->root.type == bfd_link_hash_indirect)
7845 return TRUE;
7846
7847 if (h->root.type == bfd_link_hash_warning)
7848 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7849
7850 if (h->root.type != bfd_link_hash_defined
7851 && h->root.type != bfd_link_hash_defweak)
7852 return TRUE;
7853
7854 eh = (struct ppc_link_hash_entry *) h;
7855 if (eh->adjust_done)
7856 return TRUE;
7857
7858 if (eh->elf.root.u.def.section == toc_inf->toc)
7859 {
7860 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7861 if (skip != (unsigned long) -1)
7862 eh->elf.root.u.def.value -= skip;
7863 else
7864 {
7865 (*_bfd_error_handler)
7866 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7867 eh->elf.root.u.def.section = &bfd_abs_section;
7868 eh->elf.root.u.def.value = 0;
7869 }
7870 eh->adjust_done = 1;
7871 }
7872 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7873 toc_inf->global_toc_syms = TRUE;
7874
7875 return TRUE;
7876 }
7877
7878 /* Examine all relocs referencing .toc sections in order to remove
7879 unused .toc entries. */
7880
7881 bfd_boolean
7882 ppc64_elf_edit_toc (struct bfd_link_info *info)
7883 {
7884 bfd *ibfd;
7885 struct adjust_toc_info toc_inf;
7886 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7887
7888 htab->do_toc_opt = 1;
7889 toc_inf.global_toc_syms = TRUE;
7890 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7891 {
7892 asection *toc, *sec;
7893 Elf_Internal_Shdr *symtab_hdr;
7894 Elf_Internal_Sym *local_syms;
7895 struct elf_link_hash_entry **sym_hashes;
7896 Elf_Internal_Rela *relstart, *rel;
7897 unsigned long *skip, *drop;
7898 unsigned char *used;
7899 unsigned char *keep, last, some_unused;
7900
7901 toc = bfd_get_section_by_name (ibfd, ".toc");
7902 if (toc == NULL
7903 || toc->size == 0
7904 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7905 || elf_discarded_section (toc))
7906 continue;
7907
7908 local_syms = NULL;
7909 symtab_hdr = &elf_symtab_hdr (ibfd);
7910 sym_hashes = elf_sym_hashes (ibfd);
7911
7912 /* Look at sections dropped from the final link. */
7913 skip = NULL;
7914 relstart = NULL;
7915 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7916 {
7917 if (sec->reloc_count == 0
7918 || !elf_discarded_section (sec)
7919 || get_opd_info (sec)
7920 || (sec->flags & SEC_ALLOC) == 0
7921 || (sec->flags & SEC_DEBUGGING) != 0)
7922 continue;
7923
7924 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7925 if (relstart == NULL)
7926 goto error_ret;
7927
7928 /* Run through the relocs to see which toc entries might be
7929 unused. */
7930 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7931 {
7932 enum elf_ppc64_reloc_type r_type;
7933 unsigned long r_symndx;
7934 asection *sym_sec;
7935 struct elf_link_hash_entry *h;
7936 Elf_Internal_Sym *sym;
7937 bfd_vma val;
7938
7939 r_type = ELF64_R_TYPE (rel->r_info);
7940 switch (r_type)
7941 {
7942 default:
7943 continue;
7944
7945 case R_PPC64_TOC16:
7946 case R_PPC64_TOC16_LO:
7947 case R_PPC64_TOC16_HI:
7948 case R_PPC64_TOC16_HA:
7949 case R_PPC64_TOC16_DS:
7950 case R_PPC64_TOC16_LO_DS:
7951 break;
7952 }
7953
7954 r_symndx = ELF64_R_SYM (rel->r_info);
7955 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7956 r_symndx, ibfd))
7957 goto error_ret;
7958
7959 if (sym_sec != toc)
7960 continue;
7961
7962 if (h != NULL)
7963 val = h->root.u.def.value;
7964 else
7965 val = sym->st_value;
7966 val += rel->r_addend;
7967
7968 if (val >= toc->size)
7969 continue;
7970
7971 /* Anything in the toc ought to be aligned to 8 bytes.
7972 If not, don't mark as unused. */
7973 if (val & 7)
7974 continue;
7975
7976 if (skip == NULL)
7977 {
7978 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7979 if (skip == NULL)
7980 goto error_ret;
7981 }
7982
7983 skip[val >> 3] = 1;
7984 }
7985
7986 if (elf_section_data (sec)->relocs != relstart)
7987 free (relstart);
7988 }
7989
7990 if (skip == NULL)
7991 continue;
7992
7993 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7994 if (used == NULL)
7995 {
7996 error_ret:
7997 if (local_syms != NULL
7998 && symtab_hdr->contents != (unsigned char *) local_syms)
7999 free (local_syms);
8000 if (sec != NULL
8001 && relstart != NULL
8002 && elf_section_data (sec)->relocs != relstart)
8003 free (relstart);
8004 if (skip != NULL)
8005 free (skip);
8006 return FALSE;
8007 }
8008
8009 /* Now check all kept sections that might reference the toc.
8010 Check the toc itself last. */
8011 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8012 : ibfd->sections);
8013 sec != NULL;
8014 sec = (sec == toc ? NULL
8015 : sec->next == NULL ? toc
8016 : sec->next == toc && toc->next ? toc->next
8017 : sec->next))
8018 {
8019 int repeat;
8020
8021 if (sec->reloc_count == 0
8022 || elf_discarded_section (sec)
8023 || get_opd_info (sec)
8024 || (sec->flags & SEC_ALLOC) == 0
8025 || (sec->flags & SEC_DEBUGGING) != 0)
8026 continue;
8027
8028 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
8029 if (relstart == NULL)
8030 goto error_ret;
8031
8032 /* Mark toc entries referenced as used. */
8033 repeat = 0;
8034 do
8035 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8036 {
8037 enum elf_ppc64_reloc_type r_type;
8038 unsigned long r_symndx;
8039 asection *sym_sec;
8040 struct elf_link_hash_entry *h;
8041 Elf_Internal_Sym *sym;
8042 bfd_vma val;
8043
8044 r_type = ELF64_R_TYPE (rel->r_info);
8045 switch (r_type)
8046 {
8047 case R_PPC64_TOC16:
8048 case R_PPC64_TOC16_LO:
8049 case R_PPC64_TOC16_HI:
8050 case R_PPC64_TOC16_HA:
8051 case R_PPC64_TOC16_DS:
8052 case R_PPC64_TOC16_LO_DS:
8053 /* In case we're taking addresses of toc entries. */
8054 case R_PPC64_ADDR64:
8055 break;
8056
8057 default:
8058 continue;
8059 }
8060
8061 r_symndx = ELF64_R_SYM (rel->r_info);
8062 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8063 r_symndx, ibfd))
8064 {
8065 free (used);
8066 goto error_ret;
8067 }
8068
8069 if (sym_sec != toc)
8070 continue;
8071
8072 if (h != NULL)
8073 val = h->root.u.def.value;
8074 else
8075 val = sym->st_value;
8076 val += rel->r_addend;
8077
8078 if (val >= toc->size)
8079 continue;
8080
8081 /* For the toc section, we only mark as used if
8082 this entry itself isn't unused. */
8083 if (sec == toc
8084 && !used[val >> 3]
8085 && (used[rel->r_offset >> 3]
8086 || !skip[rel->r_offset >> 3]))
8087 /* Do all the relocs again, to catch reference
8088 chains. */
8089 repeat = 1;
8090
8091 used[val >> 3] = 1;
8092 }
8093 while (repeat);
8094 }
8095
8096 /* Merge the used and skip arrays. Assume that TOC
8097 doublewords not appearing as either used or unused belong
8098 to to an entry more than one doubleword in size. */
8099 for (drop = skip, keep = used, last = 0, some_unused = 0;
8100 drop < skip + (toc->size + 7) / 8;
8101 ++drop, ++keep)
8102 {
8103 if (*keep)
8104 {
8105 *drop = 0;
8106 last = 0;
8107 }
8108 else if (*drop)
8109 {
8110 some_unused = 1;
8111 last = 1;
8112 }
8113 else
8114 *drop = last;
8115 }
8116
8117 free (used);
8118
8119 if (some_unused)
8120 {
8121 bfd_byte *contents, *src;
8122 unsigned long off;
8123
8124 /* Shuffle the toc contents, and at the same time convert the
8125 skip array from booleans into offsets. */
8126 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8127 goto error_ret;
8128
8129 elf_section_data (toc)->this_hdr.contents = contents;
8130
8131 for (src = contents, off = 0, drop = skip;
8132 src < contents + toc->size;
8133 src += 8, ++drop)
8134 {
8135 if (*drop)
8136 {
8137 *drop = (unsigned long) -1;
8138 off += 8;
8139 }
8140 else if (off != 0)
8141 {
8142 *drop = off;
8143 memcpy (src - off, src, 8);
8144 }
8145 }
8146 toc->rawsize = toc->size;
8147 toc->size = src - contents - off;
8148
8149 if (toc->reloc_count != 0)
8150 {
8151 Elf_Internal_Rela *wrel;
8152 bfd_size_type sz;
8153
8154 /* Read toc relocs. */
8155 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8156 TRUE);
8157 if (relstart == NULL)
8158 goto error_ret;
8159
8160 /* Remove unused toc relocs, and adjust those we keep. */
8161 wrel = relstart;
8162 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8163 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8164 {
8165 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8166 wrel->r_info = rel->r_info;
8167 wrel->r_addend = rel->r_addend;
8168 ++wrel;
8169 }
8170 else if (!dec_dynrel_count (rel->r_info, toc, info,
8171 &local_syms, NULL, NULL))
8172 goto error_ret;
8173
8174 toc->reloc_count = wrel - relstart;
8175 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8176 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8177 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8178 }
8179
8180 /* Adjust addends for relocs against the toc section sym. */
8181 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8182 {
8183 if (sec->reloc_count == 0
8184 || elf_discarded_section (sec))
8185 continue;
8186
8187 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8188 TRUE);
8189 if (relstart == NULL)
8190 goto error_ret;
8191
8192 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8193 {
8194 enum elf_ppc64_reloc_type r_type;
8195 unsigned long r_symndx;
8196 asection *sym_sec;
8197 struct elf_link_hash_entry *h;
8198 Elf_Internal_Sym *sym;
8199
8200 r_type = ELF64_R_TYPE (rel->r_info);
8201 switch (r_type)
8202 {
8203 default:
8204 continue;
8205
8206 case R_PPC64_TOC16:
8207 case R_PPC64_TOC16_LO:
8208 case R_PPC64_TOC16_HI:
8209 case R_PPC64_TOC16_HA:
8210 case R_PPC64_TOC16_DS:
8211 case R_PPC64_TOC16_LO_DS:
8212 case R_PPC64_ADDR64:
8213 break;
8214 }
8215
8216 r_symndx = ELF64_R_SYM (rel->r_info);
8217 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8218 r_symndx, ibfd))
8219 goto error_ret;
8220
8221 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8222 continue;
8223
8224 rel->r_addend -= skip[rel->r_addend >> 3];
8225 }
8226 }
8227
8228 /* We shouldn't have local or global symbols defined in the TOC,
8229 but handle them anyway. */
8230 if (local_syms != NULL)
8231 {
8232 Elf_Internal_Sym *sym;
8233
8234 for (sym = local_syms;
8235 sym < local_syms + symtab_hdr->sh_info;
8236 ++sym)
8237 if (sym->st_value != 0
8238 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8239 {
8240 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8241 sym->st_value -= skip[sym->st_value >> 3];
8242 else
8243 {
8244 (*_bfd_error_handler)
8245 (_("%s defined in removed toc entry"),
8246 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8247 NULL));
8248 sym->st_value = 0;
8249 sym->st_shndx = SHN_ABS;
8250 }
8251 symtab_hdr->contents = (unsigned char *) local_syms;
8252 }
8253 }
8254
8255 /* Finally, adjust any global syms defined in the toc. */
8256 if (toc_inf.global_toc_syms)
8257 {
8258 toc_inf.toc = toc;
8259 toc_inf.skip = skip;
8260 toc_inf.global_toc_syms = FALSE;
8261 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8262 &toc_inf);
8263 }
8264 }
8265
8266 if (local_syms != NULL
8267 && symtab_hdr->contents != (unsigned char *) local_syms)
8268 {
8269 if (!info->keep_memory)
8270 free (local_syms);
8271 else
8272 symtab_hdr->contents = (unsigned char *) local_syms;
8273 }
8274 free (skip);
8275 }
8276
8277 return TRUE;
8278 }
8279
8280 /* Return true iff input section I references the TOC using
8281 instructions limited to +/-32k offsets. */
8282
8283 bfd_boolean
8284 ppc64_elf_has_small_toc_reloc (asection *i)
8285 {
8286 return (is_ppc64_elf (i->owner)
8287 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8288 }
8289
8290 /* Allocate space for one GOT entry. */
8291
8292 static void
8293 allocate_got (struct elf_link_hash_entry *h,
8294 struct bfd_link_info *info,
8295 struct got_entry *gent)
8296 {
8297 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8298 bfd_boolean dyn;
8299 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8300 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8301 ? 16 : 8);
8302 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8303 ? 2 : 1) * sizeof (Elf64_External_Rela);
8304 asection *got = ppc64_elf_tdata (gent->owner)->got;
8305
8306 gent->got.offset = got->size;
8307 got->size += entsize;
8308
8309 dyn = htab->elf.dynamic_sections_created;
8310 if ((info->shared
8311 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8312 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8313 || h->root.type != bfd_link_hash_undefweak))
8314 {
8315 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8316 relgot->size += rentsize;
8317 }
8318 else if (h->type == STT_GNU_IFUNC)
8319 {
8320 asection *relgot = htab->reliplt;
8321 relgot->size += rentsize;
8322 htab->got_reli_size += rentsize;
8323 }
8324 }
8325
8326 /* This function merges got entries in the same toc group. */
8327
8328 static void
8329 merge_got_entries (struct got_entry **pent)
8330 {
8331 struct got_entry *ent, *ent2;
8332
8333 for (ent = *pent; ent != NULL; ent = ent->next)
8334 if (!ent->is_indirect)
8335 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8336 if (!ent2->is_indirect
8337 && ent2->addend == ent->addend
8338 && ent2->tls_type == ent->tls_type
8339 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8340 {
8341 ent2->is_indirect = TRUE;
8342 ent2->got.ent = ent;
8343 }
8344 }
8345
8346 /* Allocate space in .plt, .got and associated reloc sections for
8347 dynamic relocs. */
8348
8349 static bfd_boolean
8350 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8351 {
8352 struct bfd_link_info *info;
8353 struct ppc_link_hash_table *htab;
8354 asection *s;
8355 struct ppc_link_hash_entry *eh;
8356 struct ppc_dyn_relocs *p;
8357 struct got_entry **pgent, *gent;
8358
8359 if (h->root.type == bfd_link_hash_indirect)
8360 return TRUE;
8361
8362 if (h->root.type == bfd_link_hash_warning)
8363 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8364
8365 info = (struct bfd_link_info *) inf;
8366 htab = ppc_hash_table (info);
8367 if (htab == NULL)
8368 return FALSE;
8369
8370 if ((htab->elf.dynamic_sections_created
8371 && h->dynindx != -1
8372 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8373 || h->type == STT_GNU_IFUNC)
8374 {
8375 struct plt_entry *pent;
8376 bfd_boolean doneone = FALSE;
8377 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8378 if (pent->plt.refcount > 0)
8379 {
8380 if (!htab->elf.dynamic_sections_created
8381 || h->dynindx == -1)
8382 {
8383 s = htab->iplt;
8384 pent->plt.offset = s->size;
8385 s->size += PLT_ENTRY_SIZE;
8386 s = htab->reliplt;
8387 }
8388 else
8389 {
8390 /* If this is the first .plt entry, make room for the special
8391 first entry. */
8392 s = htab->plt;
8393 if (s->size == 0)
8394 s->size += PLT_INITIAL_ENTRY_SIZE;
8395
8396 pent->plt.offset = s->size;
8397
8398 /* Make room for this entry. */
8399 s->size += PLT_ENTRY_SIZE;
8400
8401 /* Make room for the .glink code. */
8402 s = htab->glink;
8403 if (s->size == 0)
8404 s->size += GLINK_CALL_STUB_SIZE;
8405 /* We need bigger stubs past index 32767. */
8406 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8407 s->size += 4;
8408 s->size += 2*4;
8409
8410 /* We also need to make an entry in the .rela.plt section. */
8411 s = htab->relplt;
8412 }
8413 s->size += sizeof (Elf64_External_Rela);
8414 doneone = TRUE;
8415 }
8416 else
8417 pent->plt.offset = (bfd_vma) -1;
8418 if (!doneone)
8419 {
8420 h->plt.plist = NULL;
8421 h->needs_plt = 0;
8422 }
8423 }
8424 else
8425 {
8426 h->plt.plist = NULL;
8427 h->needs_plt = 0;
8428 }
8429
8430 eh = (struct ppc_link_hash_entry *) h;
8431 /* Run through the TLS GD got entries first if we're changing them
8432 to TPREL. */
8433 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8434 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8435 if (gent->got.refcount > 0
8436 && (gent->tls_type & TLS_GD) != 0)
8437 {
8438 /* This was a GD entry that has been converted to TPREL. If
8439 there happens to be a TPREL entry we can use that one. */
8440 struct got_entry *ent;
8441 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8442 if (ent->got.refcount > 0
8443 && (ent->tls_type & TLS_TPREL) != 0
8444 && ent->addend == gent->addend
8445 && ent->owner == gent->owner)
8446 {
8447 gent->got.refcount = 0;
8448 break;
8449 }
8450
8451 /* If not, then we'll be using our own TPREL entry. */
8452 if (gent->got.refcount != 0)
8453 gent->tls_type = TLS_TLS | TLS_TPREL;
8454 }
8455
8456 /* Remove any list entry that won't generate a word in the GOT before
8457 we call merge_got_entries. Otherwise we risk merging to empty
8458 entries. */
8459 pgent = &h->got.glist;
8460 while ((gent = *pgent) != NULL)
8461 if (gent->got.refcount > 0)
8462 {
8463 if ((gent->tls_type & TLS_LD) != 0
8464 && !h->def_dynamic)
8465 {
8466 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8467 *pgent = gent->next;
8468 }
8469 else
8470 pgent = &gent->next;
8471 }
8472 else
8473 *pgent = gent->next;
8474
8475 if (!htab->do_multi_toc)
8476 merge_got_entries (&h->got.glist);
8477
8478 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8479 if (!gent->is_indirect)
8480 {
8481 /* Make sure this symbol is output as a dynamic symbol.
8482 Undefined weak syms won't yet be marked as dynamic,
8483 nor will all TLS symbols. */
8484 if (h->dynindx == -1
8485 && !h->forced_local
8486 && h->type != STT_GNU_IFUNC
8487 && htab->elf.dynamic_sections_created)
8488 {
8489 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8490 return FALSE;
8491 }
8492
8493 if (!is_ppc64_elf (gent->owner))
8494 abort ();
8495
8496 allocate_got (h, info, gent);
8497 }
8498
8499 if (eh->dyn_relocs == NULL
8500 || (!htab->elf.dynamic_sections_created
8501 && h->type != STT_GNU_IFUNC))
8502 return TRUE;
8503
8504 /* In the shared -Bsymbolic case, discard space allocated for
8505 dynamic pc-relative relocs against symbols which turn out to be
8506 defined in regular objects. For the normal shared case, discard
8507 space for relocs that have become local due to symbol visibility
8508 changes. */
8509
8510 if (info->shared)
8511 {
8512 /* Relocs that use pc_count are those that appear on a call insn,
8513 or certain REL relocs (see must_be_dyn_reloc) that can be
8514 generated via assembly. We want calls to protected symbols to
8515 resolve directly to the function rather than going via the plt.
8516 If people want function pointer comparisons to work as expected
8517 then they should avoid writing weird assembly. */
8518 if (SYMBOL_CALLS_LOCAL (info, h))
8519 {
8520 struct ppc_dyn_relocs **pp;
8521
8522 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8523 {
8524 p->count -= p->pc_count;
8525 p->pc_count = 0;
8526 if (p->count == 0)
8527 *pp = p->next;
8528 else
8529 pp = &p->next;
8530 }
8531 }
8532
8533 /* Also discard relocs on undefined weak syms with non-default
8534 visibility. */
8535 if (eh->dyn_relocs != NULL
8536 && h->root.type == bfd_link_hash_undefweak)
8537 {
8538 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8539 eh->dyn_relocs = NULL;
8540
8541 /* Make sure this symbol is output as a dynamic symbol.
8542 Undefined weak syms won't yet be marked as dynamic. */
8543 else if (h->dynindx == -1
8544 && !h->forced_local)
8545 {
8546 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8547 return FALSE;
8548 }
8549 }
8550 }
8551 else if (h->type == STT_GNU_IFUNC)
8552 {
8553 if (!h->non_got_ref)
8554 eh->dyn_relocs = NULL;
8555 }
8556 else if (ELIMINATE_COPY_RELOCS)
8557 {
8558 /* For the non-shared case, discard space for relocs against
8559 symbols which turn out to need copy relocs or are not
8560 dynamic. */
8561
8562 if (!h->non_got_ref
8563 && !h->def_regular)
8564 {
8565 /* Make sure this symbol is output as a dynamic symbol.
8566 Undefined weak syms won't yet be marked as dynamic. */
8567 if (h->dynindx == -1
8568 && !h->forced_local)
8569 {
8570 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8571 return FALSE;
8572 }
8573
8574 /* If that succeeded, we know we'll be keeping all the
8575 relocs. */
8576 if (h->dynindx != -1)
8577 goto keep;
8578 }
8579
8580 eh->dyn_relocs = NULL;
8581
8582 keep: ;
8583 }
8584
8585 /* Finally, allocate space. */
8586 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8587 {
8588 asection *sreloc = elf_section_data (p->sec)->sreloc;
8589 if (!htab->elf.dynamic_sections_created)
8590 sreloc = htab->reliplt;
8591 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8592 }
8593
8594 return TRUE;
8595 }
8596
8597 /* Find any dynamic relocs that apply to read-only sections. */
8598
8599 static bfd_boolean
8600 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8601 {
8602 struct ppc_link_hash_entry *eh;
8603 struct ppc_dyn_relocs *p;
8604
8605 if (h->root.type == bfd_link_hash_warning)
8606 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8607
8608 eh = (struct ppc_link_hash_entry *) h;
8609 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8610 {
8611 asection *s = p->sec->output_section;
8612
8613 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8614 {
8615 struct bfd_link_info *info = inf;
8616
8617 info->flags |= DF_TEXTREL;
8618
8619 /* Not an error, just cut short the traversal. */
8620 return FALSE;
8621 }
8622 }
8623 return TRUE;
8624 }
8625
8626 /* Set the sizes of the dynamic sections. */
8627
8628 static bfd_boolean
8629 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8630 struct bfd_link_info *info)
8631 {
8632 struct ppc_link_hash_table *htab;
8633 bfd *dynobj;
8634 asection *s;
8635 bfd_boolean relocs;
8636 bfd *ibfd;
8637 struct got_entry *first_tlsld;
8638
8639 htab = ppc_hash_table (info);
8640 if (htab == NULL)
8641 return FALSE;
8642
8643 dynobj = htab->elf.dynobj;
8644 if (dynobj == NULL)
8645 abort ();
8646
8647 if (htab->elf.dynamic_sections_created)
8648 {
8649 /* Set the contents of the .interp section to the interpreter. */
8650 if (info->executable)
8651 {
8652 s = bfd_get_section_by_name (dynobj, ".interp");
8653 if (s == NULL)
8654 abort ();
8655 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8656 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8657 }
8658 }
8659
8660 /* Set up .got offsets for local syms, and space for local dynamic
8661 relocs. */
8662 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8663 {
8664 struct got_entry **lgot_ents;
8665 struct got_entry **end_lgot_ents;
8666 struct plt_entry **local_plt;
8667 struct plt_entry **end_local_plt;
8668 unsigned char *lgot_masks;
8669 bfd_size_type locsymcount;
8670 Elf_Internal_Shdr *symtab_hdr;
8671 asection *srel;
8672
8673 if (!is_ppc64_elf (ibfd))
8674 continue;
8675
8676 for (s = ibfd->sections; s != NULL; s = s->next)
8677 {
8678 struct ppc_dyn_relocs *p;
8679
8680 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8681 {
8682 if (!bfd_is_abs_section (p->sec)
8683 && bfd_is_abs_section (p->sec->output_section))
8684 {
8685 /* Input section has been discarded, either because
8686 it is a copy of a linkonce section or due to
8687 linker script /DISCARD/, so we'll be discarding
8688 the relocs too. */
8689 }
8690 else if (p->count != 0)
8691 {
8692 srel = elf_section_data (p->sec)->sreloc;
8693 if (!htab->elf.dynamic_sections_created)
8694 srel = htab->reliplt;
8695 srel->size += p->count * sizeof (Elf64_External_Rela);
8696 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8697 info->flags |= DF_TEXTREL;
8698 }
8699 }
8700 }
8701
8702 lgot_ents = elf_local_got_ents (ibfd);
8703 if (!lgot_ents)
8704 continue;
8705
8706 symtab_hdr = &elf_symtab_hdr (ibfd);
8707 locsymcount = symtab_hdr->sh_info;
8708 end_lgot_ents = lgot_ents + locsymcount;
8709 local_plt = (struct plt_entry **) end_lgot_ents;
8710 end_local_plt = local_plt + locsymcount;
8711 lgot_masks = (unsigned char *) end_local_plt;
8712 s = ppc64_elf_tdata (ibfd)->got;
8713 srel = ppc64_elf_tdata (ibfd)->relgot;
8714 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8715 {
8716 struct got_entry **pent, *ent;
8717
8718 pent = lgot_ents;
8719 while ((ent = *pent) != NULL)
8720 if (ent->got.refcount > 0)
8721 {
8722 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8723 {
8724 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8725 *pent = ent->next;
8726 }
8727 else
8728 {
8729 unsigned int num = 1;
8730 ent->got.offset = s->size;
8731 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8732 num = 2;
8733 s->size += num * 8;
8734 if (info->shared)
8735 srel->size += num * sizeof (Elf64_External_Rela);
8736 else if ((*lgot_masks & PLT_IFUNC) != 0)
8737 {
8738 htab->reliplt->size
8739 += num * sizeof (Elf64_External_Rela);
8740 htab->got_reli_size
8741 += num * sizeof (Elf64_External_Rela);
8742 }
8743 pent = &ent->next;
8744 }
8745 }
8746 else
8747 *pent = ent->next;
8748 }
8749
8750 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8751 for (; local_plt < end_local_plt; ++local_plt)
8752 {
8753 struct plt_entry *ent;
8754
8755 for (ent = *local_plt; ent != NULL; ent = ent->next)
8756 if (ent->plt.refcount > 0)
8757 {
8758 s = htab->iplt;
8759 ent->plt.offset = s->size;
8760 s->size += PLT_ENTRY_SIZE;
8761
8762 htab->reliplt->size += sizeof (Elf64_External_Rela);
8763 }
8764 else
8765 ent->plt.offset = (bfd_vma) -1;
8766 }
8767 }
8768
8769 /* Allocate global sym .plt and .got entries, and space for global
8770 sym dynamic relocs. */
8771 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8772
8773 first_tlsld = NULL;
8774 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8775 {
8776 struct got_entry *ent;
8777
8778 if (!is_ppc64_elf (ibfd))
8779 continue;
8780
8781 ent = ppc64_tlsld_got (ibfd);
8782 if (ent->got.refcount > 0)
8783 {
8784 if (!htab->do_multi_toc && first_tlsld != NULL)
8785 {
8786 ent->is_indirect = TRUE;
8787 ent->got.ent = first_tlsld;
8788 }
8789 else
8790 {
8791 if (first_tlsld == NULL)
8792 first_tlsld = ent;
8793 s = ppc64_elf_tdata (ibfd)->got;
8794 ent->got.offset = s->size;
8795 ent->owner = ibfd;
8796 s->size += 16;
8797 if (info->shared)
8798 {
8799 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8800 srel->size += sizeof (Elf64_External_Rela);
8801 }
8802 }
8803 }
8804 else
8805 ent->got.offset = (bfd_vma) -1;
8806 }
8807
8808 /* We now have determined the sizes of the various dynamic sections.
8809 Allocate memory for them. */
8810 relocs = FALSE;
8811 for (s = dynobj->sections; s != NULL; s = s->next)
8812 {
8813 if ((s->flags & SEC_LINKER_CREATED) == 0)
8814 continue;
8815
8816 if (s == htab->brlt || s == htab->relbrlt)
8817 /* These haven't been allocated yet; don't strip. */
8818 continue;
8819 else if (s == htab->got
8820 || s == htab->plt
8821 || s == htab->iplt
8822 || s == htab->glink
8823 || s == htab->dynbss)
8824 {
8825 /* Strip this section if we don't need it; see the
8826 comment below. */
8827 }
8828 else if (CONST_STRNEQ (s->name, ".rela"))
8829 {
8830 if (s->size != 0)
8831 {
8832 if (s != htab->relplt)
8833 relocs = TRUE;
8834
8835 /* We use the reloc_count field as a counter if we need
8836 to copy relocs into the output file. */
8837 s->reloc_count = 0;
8838 }
8839 }
8840 else
8841 {
8842 /* It's not one of our sections, so don't allocate space. */
8843 continue;
8844 }
8845
8846 if (s->size == 0)
8847 {
8848 /* If we don't need this section, strip it from the
8849 output file. This is mostly to handle .rela.bss and
8850 .rela.plt. We must create both sections in
8851 create_dynamic_sections, because they must be created
8852 before the linker maps input sections to output
8853 sections. The linker does that before
8854 adjust_dynamic_symbol is called, and it is that
8855 function which decides whether anything needs to go
8856 into these sections. */
8857 s->flags |= SEC_EXCLUDE;
8858 continue;
8859 }
8860
8861 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8862 continue;
8863
8864 /* Allocate memory for the section contents. We use bfd_zalloc
8865 here in case unused entries are not reclaimed before the
8866 section's contents are written out. This should not happen,
8867 but this way if it does we get a R_PPC64_NONE reloc in .rela
8868 sections instead of garbage.
8869 We also rely on the section contents being zero when writing
8870 the GOT. */
8871 s->contents = bfd_zalloc (dynobj, s->size);
8872 if (s->contents == NULL)
8873 return FALSE;
8874 }
8875
8876 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8877 {
8878 if (!is_ppc64_elf (ibfd))
8879 continue;
8880
8881 s = ppc64_elf_tdata (ibfd)->got;
8882 if (s != NULL && s != htab->got)
8883 {
8884 if (s->size == 0)
8885 s->flags |= SEC_EXCLUDE;
8886 else
8887 {
8888 s->contents = bfd_zalloc (ibfd, s->size);
8889 if (s->contents == NULL)
8890 return FALSE;
8891 }
8892 }
8893 s = ppc64_elf_tdata (ibfd)->relgot;
8894 if (s != NULL)
8895 {
8896 if (s->size == 0)
8897 s->flags |= SEC_EXCLUDE;
8898 else
8899 {
8900 s->contents = bfd_zalloc (ibfd, s->size);
8901 if (s->contents == NULL)
8902 return FALSE;
8903 relocs = TRUE;
8904 s->reloc_count = 0;
8905 }
8906 }
8907 }
8908
8909 if (htab->elf.dynamic_sections_created)
8910 {
8911 /* Add some entries to the .dynamic section. We fill in the
8912 values later, in ppc64_elf_finish_dynamic_sections, but we
8913 must add the entries now so that we get the correct size for
8914 the .dynamic section. The DT_DEBUG entry is filled in by the
8915 dynamic linker and used by the debugger. */
8916 #define add_dynamic_entry(TAG, VAL) \
8917 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8918
8919 if (info->executable)
8920 {
8921 if (!add_dynamic_entry (DT_DEBUG, 0))
8922 return FALSE;
8923 }
8924
8925 if (htab->plt != NULL && htab->plt->size != 0)
8926 {
8927 if (!add_dynamic_entry (DT_PLTGOT, 0)
8928 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8929 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8930 || !add_dynamic_entry (DT_JMPREL, 0)
8931 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8932 return FALSE;
8933 }
8934
8935 if (NO_OPD_RELOCS)
8936 {
8937 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8938 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8939 return FALSE;
8940 }
8941
8942 if (!htab->no_tls_get_addr_opt
8943 && htab->tls_get_addr_fd != NULL
8944 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8945 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8946 return FALSE;
8947
8948 if (relocs)
8949 {
8950 if (!add_dynamic_entry (DT_RELA, 0)
8951 || !add_dynamic_entry (DT_RELASZ, 0)
8952 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8953 return FALSE;
8954
8955 /* If any dynamic relocs apply to a read-only section,
8956 then we need a DT_TEXTREL entry. */
8957 if ((info->flags & DF_TEXTREL) == 0)
8958 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8959
8960 if ((info->flags & DF_TEXTREL) != 0)
8961 {
8962 if (!add_dynamic_entry (DT_TEXTREL, 0))
8963 return FALSE;
8964 }
8965 }
8966 }
8967 #undef add_dynamic_entry
8968
8969 return TRUE;
8970 }
8971
8972 /* Determine the type of stub needed, if any, for a call. */
8973
8974 static inline enum ppc_stub_type
8975 ppc_type_of_stub (asection *input_sec,
8976 const Elf_Internal_Rela *rel,
8977 struct ppc_link_hash_entry **hash,
8978 struct plt_entry **plt_ent,
8979 bfd_vma destination)
8980 {
8981 struct ppc_link_hash_entry *h = *hash;
8982 bfd_vma location;
8983 bfd_vma branch_offset;
8984 bfd_vma max_branch_offset;
8985 enum elf_ppc64_reloc_type r_type;
8986
8987 if (h != NULL)
8988 {
8989 struct plt_entry *ent;
8990 struct ppc_link_hash_entry *fdh = h;
8991 if (h->oh != NULL
8992 && h->oh->is_func_descriptor)
8993 {
8994 fdh = ppc_follow_link (h->oh);
8995 *hash = fdh;
8996 }
8997
8998 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8999 if (ent->addend == rel->r_addend
9000 && ent->plt.offset != (bfd_vma) -1)
9001 {
9002 *plt_ent = ent;
9003 return ppc_stub_plt_call;
9004 }
9005
9006 /* Here, we know we don't have a plt entry. If we don't have a
9007 either a defined function descriptor or a defined entry symbol
9008 in a regular object file, then it is pointless trying to make
9009 any other type of stub. */
9010 if (!((fdh->elf.root.type == bfd_link_hash_defined
9011 || fdh->elf.root.type == bfd_link_hash_defweak)
9012 && fdh->elf.root.u.def.section->output_section != NULL)
9013 && !((h->elf.root.type == bfd_link_hash_defined
9014 || h->elf.root.type == bfd_link_hash_defweak)
9015 && h->elf.root.u.def.section->output_section != NULL))
9016 return ppc_stub_none;
9017 }
9018 else if (elf_local_got_ents (input_sec->owner) != NULL)
9019 {
9020 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9021 struct plt_entry **local_plt = (struct plt_entry **)
9022 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9023 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9024
9025 if (local_plt[r_symndx] != NULL)
9026 {
9027 struct plt_entry *ent;
9028
9029 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9030 if (ent->addend == rel->r_addend
9031 && ent->plt.offset != (bfd_vma) -1)
9032 {
9033 *plt_ent = ent;
9034 return ppc_stub_plt_call;
9035 }
9036 }
9037 }
9038
9039 /* Determine where the call point is. */
9040 location = (input_sec->output_offset
9041 + input_sec->output_section->vma
9042 + rel->r_offset);
9043
9044 branch_offset = destination - location;
9045 r_type = ELF64_R_TYPE (rel->r_info);
9046
9047 /* Determine if a long branch stub is needed. */
9048 max_branch_offset = 1 << 25;
9049 if (r_type != R_PPC64_REL24)
9050 max_branch_offset = 1 << 15;
9051
9052 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9053 /* We need a stub. Figure out whether a long_branch or plt_branch
9054 is needed later. */
9055 return ppc_stub_long_branch;
9056
9057 return ppc_stub_none;
9058 }
9059
9060 /* Build a .plt call stub. */
9061
9062 static inline bfd_byte *
9063 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9064 {
9065 #define PPC_LO(v) ((v) & 0xffff)
9066 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9067 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9068
9069 if (PPC_HA (offset) != 0)
9070 {
9071 if (r != NULL)
9072 {
9073 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9074 r[1].r_offset = r[0].r_offset + 8;
9075 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9076 r[1].r_addend = r[0].r_addend;
9077 if (PPC_HA (offset + 16) != PPC_HA (offset))
9078 {
9079 r[2].r_offset = r[1].r_offset + 4;
9080 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9081 r[2].r_addend = r[0].r_addend;
9082 }
9083 else
9084 {
9085 r[2].r_offset = r[1].r_offset + 8;
9086 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9087 r[2].r_addend = r[0].r_addend + 8;
9088 r[3].r_offset = r[2].r_offset + 4;
9089 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9090 r[3].r_addend = r[0].r_addend + 16;
9091 }
9092 }
9093 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9094 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9095 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9096 if (PPC_HA (offset + 16) != PPC_HA (offset))
9097 {
9098 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9099 offset = 0;
9100 }
9101 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9102 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9103 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9104 bfd_put_32 (obfd, BCTR, p), p += 4;
9105 }
9106 else
9107 {
9108 if (r != NULL)
9109 {
9110 r[0].r_offset += 4;
9111 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9112 if (PPC_HA (offset + 16) != PPC_HA (offset))
9113 {
9114 r[1].r_offset = r[0].r_offset + 4;
9115 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9116 r[1].r_addend = r[0].r_addend;
9117 }
9118 else
9119 {
9120 r[1].r_offset = r[0].r_offset + 8;
9121 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9122 r[1].r_addend = r[0].r_addend + 16;
9123 r[2].r_offset = r[1].r_offset + 4;
9124 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9125 r[2].r_addend = r[0].r_addend + 8;
9126 }
9127 }
9128 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9129 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9130 if (PPC_HA (offset + 16) != PPC_HA (offset))
9131 {
9132 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9133 offset = 0;
9134 }
9135 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9136 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9137 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9138 bfd_put_32 (obfd, BCTR, p), p += 4;
9139 }
9140 return p;
9141 }
9142
9143 /* Build a special .plt call stub for __tls_get_addr. */
9144
9145 #define LD_R11_0R3 0xe9630000
9146 #define LD_R12_0R3 0xe9830000
9147 #define MR_R0_R3 0x7c601b78
9148 #define CMPDI_R11_0 0x2c2b0000
9149 #define ADD_R3_R12_R13 0x7c6c6a14
9150 #define BEQLR 0x4d820020
9151 #define MR_R3_R0 0x7c030378
9152 #define MFLR_R11 0x7d6802a6
9153 #define STD_R11_0R1 0xf9610000
9154 #define BCTRL 0x4e800421
9155 #define LD_R11_0R1 0xe9610000
9156 #define LD_R2_0R1 0xe8410000
9157 #define MTLR_R11 0x7d6803a6
9158
9159 static inline bfd_byte *
9160 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9161 Elf_Internal_Rela *r)
9162 {
9163 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9164 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9165 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9166 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9167 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9168 bfd_put_32 (obfd, BEQLR, p), p += 4;
9169 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9170 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9171 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9172
9173 if (r != NULL)
9174 r[0].r_offset += 9 * 4;
9175 p = build_plt_stub (obfd, p, offset, r);
9176 bfd_put_32 (obfd, BCTRL, p - 4);
9177
9178 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9179 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9180 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9181 bfd_put_32 (obfd, BLR, p), p += 4;
9182
9183 return p;
9184 }
9185
9186 static Elf_Internal_Rela *
9187 get_relocs (asection *sec, int count)
9188 {
9189 Elf_Internal_Rela *relocs;
9190 struct bfd_elf_section_data *elfsec_data;
9191
9192 elfsec_data = elf_section_data (sec);
9193 relocs = elfsec_data->relocs;
9194 if (relocs == NULL)
9195 {
9196 bfd_size_type relsize;
9197 relsize = sec->reloc_count * sizeof (*relocs);
9198 relocs = bfd_alloc (sec->owner, relsize);
9199 if (relocs == NULL)
9200 return NULL;
9201 elfsec_data->relocs = relocs;
9202 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9203 * sizeof (Elf64_External_Rela));
9204 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9205 sec->reloc_count = 0;
9206 }
9207 relocs += sec->reloc_count;
9208 sec->reloc_count += count;
9209 return relocs;
9210 }
9211
9212 static bfd_boolean
9213 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9214 {
9215 struct ppc_stub_hash_entry *stub_entry;
9216 struct ppc_branch_hash_entry *br_entry;
9217 struct bfd_link_info *info;
9218 struct ppc_link_hash_table *htab;
9219 bfd_byte *loc;
9220 bfd_byte *p;
9221 bfd_vma dest, off;
9222 int size;
9223 Elf_Internal_Rela *r;
9224 asection *plt;
9225
9226 /* Massage our args to the form they really have. */
9227 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9228 info = in_arg;
9229
9230 htab = ppc_hash_table (info);
9231 if (htab == NULL)
9232 return FALSE;
9233
9234 /* Make a note of the offset within the stubs for this entry. */
9235 stub_entry->stub_offset = stub_entry->stub_sec->size;
9236 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9237
9238 htab->stub_count[stub_entry->stub_type - 1] += 1;
9239 switch (stub_entry->stub_type)
9240 {
9241 case ppc_stub_long_branch:
9242 case ppc_stub_long_branch_r2off:
9243 /* Branches are relative. This is where we are going to. */
9244 off = dest = (stub_entry->target_value
9245 + stub_entry->target_section->output_offset
9246 + stub_entry->target_section->output_section->vma);
9247
9248 /* And this is where we are coming from. */
9249 off -= (stub_entry->stub_offset
9250 + stub_entry->stub_sec->output_offset
9251 + stub_entry->stub_sec->output_section->vma);
9252
9253 size = 4;
9254 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9255 {
9256 bfd_vma r2off;
9257
9258 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9259 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9260 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9261 loc += 4;
9262 size = 12;
9263 if (PPC_HA (r2off) != 0)
9264 {
9265 size = 16;
9266 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9267 loc += 4;
9268 }
9269 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9270 loc += 4;
9271 off -= size - 4;
9272 }
9273 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9274
9275 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9276 {
9277 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9278 stub_entry->root.string);
9279 htab->stub_error = TRUE;
9280 return FALSE;
9281 }
9282
9283 if (info->emitrelocations)
9284 {
9285 r = get_relocs (stub_entry->stub_sec, 1);
9286 if (r == NULL)
9287 return FALSE;
9288 r->r_offset = loc - stub_entry->stub_sec->contents;
9289 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9290 r->r_addend = dest;
9291 if (stub_entry->h != NULL)
9292 {
9293 struct elf_link_hash_entry **hashes;
9294 unsigned long symndx;
9295 struct ppc_link_hash_entry *h;
9296
9297 hashes = elf_sym_hashes (htab->stub_bfd);
9298 if (hashes == NULL)
9299 {
9300 bfd_size_type hsize;
9301
9302 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9303 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9304 if (hashes == NULL)
9305 return FALSE;
9306 elf_sym_hashes (htab->stub_bfd) = hashes;
9307 htab->stub_globals = 1;
9308 }
9309 symndx = htab->stub_globals++;
9310 h = stub_entry->h;
9311 hashes[symndx] = &h->elf;
9312 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9313 if (h->oh != NULL && h->oh->is_func)
9314 h = ppc_follow_link (h->oh);
9315 if (h->elf.root.u.def.section != stub_entry->target_section)
9316 /* H is an opd symbol. The addend must be zero. */
9317 r->r_addend = 0;
9318 else
9319 {
9320 off = (h->elf.root.u.def.value
9321 + h->elf.root.u.def.section->output_offset
9322 + h->elf.root.u.def.section->output_section->vma);
9323 r->r_addend -= off;
9324 }
9325 }
9326 }
9327 break;
9328
9329 case ppc_stub_plt_branch:
9330 case ppc_stub_plt_branch_r2off:
9331 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9332 stub_entry->root.string + 9,
9333 FALSE, FALSE);
9334 if (br_entry == NULL)
9335 {
9336 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9337 stub_entry->root.string);
9338 htab->stub_error = TRUE;
9339 return FALSE;
9340 }
9341
9342 dest = (stub_entry->target_value
9343 + stub_entry->target_section->output_offset
9344 + stub_entry->target_section->output_section->vma);
9345
9346 bfd_put_64 (htab->brlt->owner, dest,
9347 htab->brlt->contents + br_entry->offset);
9348
9349 if (br_entry->iter == htab->stub_iteration)
9350 {
9351 br_entry->iter = 0;
9352
9353 if (htab->relbrlt != NULL)
9354 {
9355 /* Create a reloc for the branch lookup table entry. */
9356 Elf_Internal_Rela rela;
9357 bfd_byte *rl;
9358
9359 rela.r_offset = (br_entry->offset
9360 + htab->brlt->output_offset
9361 + htab->brlt->output_section->vma);
9362 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9363 rela.r_addend = dest;
9364
9365 rl = htab->relbrlt->contents;
9366 rl += (htab->relbrlt->reloc_count++
9367 * sizeof (Elf64_External_Rela));
9368 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9369 }
9370 else if (info->emitrelocations)
9371 {
9372 r = get_relocs (htab->brlt, 1);
9373 if (r == NULL)
9374 return FALSE;
9375 /* brlt, being SEC_LINKER_CREATED does not go through the
9376 normal reloc processing. Symbols and offsets are not
9377 translated from input file to output file form, so
9378 set up the offset per the output file. */
9379 r->r_offset = (br_entry->offset
9380 + htab->brlt->output_offset
9381 + htab->brlt->output_section->vma);
9382 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9383 r->r_addend = dest;
9384 }
9385 }
9386
9387 dest = (br_entry->offset
9388 + htab->brlt->output_offset
9389 + htab->brlt->output_section->vma);
9390
9391 off = (dest
9392 - elf_gp (htab->brlt->output_section->owner)
9393 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9394
9395 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9396 {
9397 (*_bfd_error_handler)
9398 (_("linkage table error against `%s'"),
9399 stub_entry->root.string);
9400 bfd_set_error (bfd_error_bad_value);
9401 htab->stub_error = TRUE;
9402 return FALSE;
9403 }
9404
9405 if (info->emitrelocations)
9406 {
9407 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9408 if (r == NULL)
9409 return FALSE;
9410 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9411 if (bfd_big_endian (info->output_bfd))
9412 r[0].r_offset += 2;
9413 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9414 r[0].r_offset += 4;
9415 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9416 r[0].r_addend = dest;
9417 if (PPC_HA (off) != 0)
9418 {
9419 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9420 r[1].r_offset = r[0].r_offset + 4;
9421 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9422 r[1].r_addend = r[0].r_addend;
9423 }
9424 }
9425
9426 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9427 {
9428 if (PPC_HA (off) != 0)
9429 {
9430 size = 16;
9431 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9432 loc += 4;
9433 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9434 }
9435 else
9436 {
9437 size = 12;
9438 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9439 }
9440 }
9441 else
9442 {
9443 bfd_vma r2off;
9444
9445 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9446 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9447 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9448 loc += 4;
9449 size = 20;
9450 if (PPC_HA (off) != 0)
9451 {
9452 size += 4;
9453 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9454 loc += 4;
9455 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9456 loc += 4;
9457 }
9458 else
9459 {
9460 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9461 loc += 4;
9462 }
9463
9464 if (PPC_HA (r2off) != 0)
9465 {
9466 size += 4;
9467 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9468 loc += 4;
9469 }
9470 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9471 }
9472 loc += 4;
9473 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9474 loc += 4;
9475 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9476 break;
9477
9478 case ppc_stub_plt_call:
9479 if (stub_entry->h != NULL
9480 && stub_entry->h->is_func_descriptor
9481 && stub_entry->h->oh != NULL)
9482 {
9483 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9484
9485 /* If the old-ABI "dot-symbol" is undefined make it weak so
9486 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9487 FIXME: We used to define the symbol on one of the call
9488 stubs instead, which is why we test symbol section id
9489 against htab->top_id in various places. Likely all
9490 these checks could now disappear. */
9491 if (fh->elf.root.type == bfd_link_hash_undefined)
9492 fh->elf.root.type = bfd_link_hash_undefweak;
9493 }
9494
9495 /* Now build the stub. */
9496 dest = stub_entry->plt_ent->plt.offset & ~1;
9497 if (dest >= (bfd_vma) -2)
9498 abort ();
9499
9500 plt = htab->plt;
9501 if (!htab->elf.dynamic_sections_created
9502 || stub_entry->h == NULL
9503 || stub_entry->h->elf.dynindx == -1)
9504 plt = htab->iplt;
9505
9506 dest += plt->output_offset + plt->output_section->vma;
9507
9508 if (stub_entry->h == NULL
9509 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9510 {
9511 Elf_Internal_Rela rela;
9512 bfd_byte *rl;
9513
9514 rela.r_offset = dest;
9515 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9516 rela.r_addend = (stub_entry->target_value
9517 + stub_entry->target_section->output_offset
9518 + stub_entry->target_section->output_section->vma);
9519
9520 rl = (htab->reliplt->contents
9521 + (htab->reliplt->reloc_count++
9522 * sizeof (Elf64_External_Rela)));
9523 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9524 stub_entry->plt_ent->plt.offset |= 1;
9525 }
9526
9527 off = (dest
9528 - elf_gp (plt->output_section->owner)
9529 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9530
9531 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9532 {
9533 (*_bfd_error_handler)
9534 (_("linkage table error against `%s'"),
9535 stub_entry->h != NULL
9536 ? stub_entry->h->elf.root.root.string
9537 : "<local sym>");
9538 bfd_set_error (bfd_error_bad_value);
9539 htab->stub_error = TRUE;
9540 return FALSE;
9541 }
9542
9543 r = NULL;
9544 if (info->emitrelocations)
9545 {
9546 r = get_relocs (stub_entry->stub_sec,
9547 (2 + (PPC_HA (off) != 0)
9548 + (PPC_HA (off + 16) == PPC_HA (off))));
9549 if (r == NULL)
9550 return FALSE;
9551 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9552 if (bfd_big_endian (info->output_bfd))
9553 r[0].r_offset += 2;
9554 r[0].r_addend = dest;
9555 }
9556 if (stub_entry->h != NULL
9557 && (stub_entry->h == htab->tls_get_addr_fd
9558 || stub_entry->h == htab->tls_get_addr)
9559 && !htab->no_tls_get_addr_opt)
9560 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9561 else
9562 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9563 size = p - loc;
9564 break;
9565
9566 default:
9567 BFD_FAIL ();
9568 return FALSE;
9569 }
9570
9571 stub_entry->stub_sec->size += size;
9572
9573 if (htab->emit_stub_syms)
9574 {
9575 struct elf_link_hash_entry *h;
9576 size_t len1, len2;
9577 char *name;
9578 const char *const stub_str[] = { "long_branch",
9579 "long_branch_r2off",
9580 "plt_branch",
9581 "plt_branch_r2off",
9582 "plt_call" };
9583
9584 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9585 len2 = strlen (stub_entry->root.string);
9586 name = bfd_malloc (len1 + len2 + 2);
9587 if (name == NULL)
9588 return FALSE;
9589 memcpy (name, stub_entry->root.string, 9);
9590 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9591 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9592 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9593 if (h == NULL)
9594 return FALSE;
9595 if (h->root.type == bfd_link_hash_new)
9596 {
9597 h->root.type = bfd_link_hash_defined;
9598 h->root.u.def.section = stub_entry->stub_sec;
9599 h->root.u.def.value = stub_entry->stub_offset;
9600 h->ref_regular = 1;
9601 h->def_regular = 1;
9602 h->ref_regular_nonweak = 1;
9603 h->forced_local = 1;
9604 h->non_elf = 0;
9605 }
9606 }
9607
9608 return TRUE;
9609 }
9610
9611 /* As above, but don't actually build the stub. Just bump offset so
9612 we know stub section sizes, and select plt_branch stubs where
9613 long_branch stubs won't do. */
9614
9615 static bfd_boolean
9616 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9617 {
9618 struct ppc_stub_hash_entry *stub_entry;
9619 struct bfd_link_info *info;
9620 struct ppc_link_hash_table *htab;
9621 bfd_vma off;
9622 int size;
9623
9624 /* Massage our args to the form they really have. */
9625 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9626 info = in_arg;
9627
9628 htab = ppc_hash_table (info);
9629 if (htab == NULL)
9630 return FALSE;
9631
9632 if (stub_entry->stub_type == ppc_stub_plt_call)
9633 {
9634 asection *plt;
9635 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9636 if (off >= (bfd_vma) -2)
9637 abort ();
9638 plt = htab->plt;
9639 if (!htab->elf.dynamic_sections_created
9640 || stub_entry->h == NULL
9641 || stub_entry->h->elf.dynindx == -1)
9642 plt = htab->iplt;
9643 off += (plt->output_offset
9644 + plt->output_section->vma
9645 - elf_gp (plt->output_section->owner)
9646 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9647
9648 size = PLT_CALL_STUB_SIZE;
9649 if (PPC_HA (off) == 0)
9650 size -= 4;
9651 if (PPC_HA (off + 16) != PPC_HA (off))
9652 size += 4;
9653 if (stub_entry->h != NULL
9654 && (stub_entry->h == htab->tls_get_addr_fd
9655 || stub_entry->h == htab->tls_get_addr)
9656 && !htab->no_tls_get_addr_opt)
9657 size += 13 * 4;
9658 if (info->emitrelocations)
9659 {
9660 stub_entry->stub_sec->reloc_count
9661 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9662 stub_entry->stub_sec->flags |= SEC_RELOC;
9663 }
9664 }
9665 else
9666 {
9667 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9668 variants. */
9669 bfd_vma r2off = 0;
9670
9671 off = (stub_entry->target_value
9672 + stub_entry->target_section->output_offset
9673 + stub_entry->target_section->output_section->vma);
9674 off -= (stub_entry->stub_sec->size
9675 + stub_entry->stub_sec->output_offset
9676 + stub_entry->stub_sec->output_section->vma);
9677
9678 /* Reset the stub type from the plt variant in case we now
9679 can reach with a shorter stub. */
9680 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9681 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9682
9683 size = 4;
9684 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9685 {
9686 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9687 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9688 size = 12;
9689 if (PPC_HA (r2off) != 0)
9690 size = 16;
9691 off -= size - 4;
9692 }
9693
9694 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9695 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9696 {
9697 struct ppc_branch_hash_entry *br_entry;
9698
9699 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9700 stub_entry->root.string + 9,
9701 TRUE, FALSE);
9702 if (br_entry == NULL)
9703 {
9704 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9705 stub_entry->root.string);
9706 htab->stub_error = TRUE;
9707 return FALSE;
9708 }
9709
9710 if (br_entry->iter != htab->stub_iteration)
9711 {
9712 br_entry->iter = htab->stub_iteration;
9713 br_entry->offset = htab->brlt->size;
9714 htab->brlt->size += 8;
9715
9716 if (htab->relbrlt != NULL)
9717 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9718 else if (info->emitrelocations)
9719 {
9720 htab->brlt->reloc_count += 1;
9721 htab->brlt->flags |= SEC_RELOC;
9722 }
9723 }
9724
9725 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9726 off = (br_entry->offset
9727 + htab->brlt->output_offset
9728 + htab->brlt->output_section->vma
9729 - elf_gp (htab->brlt->output_section->owner)
9730 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9731
9732 if (info->emitrelocations)
9733 {
9734 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9735 stub_entry->stub_sec->flags |= SEC_RELOC;
9736 }
9737
9738 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9739 {
9740 size = 12;
9741 if (PPC_HA (off) != 0)
9742 size = 16;
9743 }
9744 else
9745 {
9746 size = 20;
9747 if (PPC_HA (off) != 0)
9748 size += 4;
9749
9750 if (PPC_HA (r2off) != 0)
9751 size += 4;
9752 }
9753 }
9754 else if (info->emitrelocations)
9755 {
9756 stub_entry->stub_sec->reloc_count += 1;
9757 stub_entry->stub_sec->flags |= SEC_RELOC;
9758 }
9759 }
9760
9761 stub_entry->stub_sec->size += size;
9762 return TRUE;
9763 }
9764
9765 /* Set up various things so that we can make a list of input sections
9766 for each output section included in the link. Returns -1 on error,
9767 0 when no stubs will be needed, and 1 on success. */
9768
9769 int
9770 ppc64_elf_setup_section_lists
9771 (struct bfd_link_info *info,
9772 asection *(*add_stub_section) (const char *, asection *),
9773 void (*layout_sections_again) (void))
9774 {
9775 bfd *input_bfd;
9776 int top_id, top_index, id;
9777 asection *section;
9778 asection **input_list;
9779 bfd_size_type amt;
9780 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9781
9782 if (htab == NULL)
9783 return -1;
9784 /* Stash our params away. */
9785 htab->add_stub_section = add_stub_section;
9786 htab->layout_sections_again = layout_sections_again;
9787
9788 if (htab->brlt == NULL)
9789 return 0;
9790
9791 /* Find the top input section id. */
9792 for (input_bfd = info->input_bfds, top_id = 3;
9793 input_bfd != NULL;
9794 input_bfd = input_bfd->link_next)
9795 {
9796 for (section = input_bfd->sections;
9797 section != NULL;
9798 section = section->next)
9799 {
9800 if (top_id < section->id)
9801 top_id = section->id;
9802 }
9803 }
9804
9805 htab->top_id = top_id;
9806 amt = sizeof (struct map_stub) * (top_id + 1);
9807 htab->stub_group = bfd_zmalloc (amt);
9808 if (htab->stub_group == NULL)
9809 return -1;
9810
9811 /* Set toc_off for com, und, abs and ind sections. */
9812 for (id = 0; id < 3; id++)
9813 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9814
9815 /* We can't use output_bfd->section_count here to find the top output
9816 section index as some sections may have been removed, and
9817 strip_excluded_output_sections doesn't renumber the indices. */
9818 for (section = info->output_bfd->sections, top_index = 0;
9819 section != NULL;
9820 section = section->next)
9821 {
9822 if (top_index < section->index)
9823 top_index = section->index;
9824 }
9825
9826 htab->top_index = top_index;
9827 amt = sizeof (asection *) * (top_index + 1);
9828 input_list = bfd_zmalloc (amt);
9829 htab->input_list = input_list;
9830 if (input_list == NULL)
9831 return -1;
9832
9833 return 1;
9834 }
9835
9836 /* Set up for first pass at multitoc partitioning. */
9837
9838 void
9839 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
9840 {
9841 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9842
9843 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
9844 htab->toc_curr = elf_gp (info->output_bfd);
9845 htab->toc_bfd = NULL;
9846 htab->toc_first_sec = NULL;
9847 }
9848
9849 /* The linker repeatedly calls this function for each TOC input section
9850 and linker generated GOT section. Group input bfds such that the toc
9851 within a group is less than 64k in size. */
9852
9853 bfd_boolean
9854 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9855 {
9856 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9857 bfd_vma addr, off, limit;
9858
9859 if (htab == NULL)
9860 return FALSE;
9861
9862 if (!htab->second_toc_pass)
9863 {
9864 /* Keep track of the first .toc or .got section for this input bfd. */
9865 if (htab->toc_bfd != isec->owner)
9866 {
9867 htab->toc_bfd = isec->owner;
9868 htab->toc_first_sec = isec;
9869 }
9870
9871 addr = isec->output_offset + isec->output_section->vma;
9872 off = addr - htab->toc_curr;
9873 limit = 0x80008000;
9874 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
9875 limit = 0x10000;
9876 if (off + isec->size > limit)
9877 {
9878 addr = (htab->toc_first_sec->output_offset
9879 + htab->toc_first_sec->output_section->vma);
9880 htab->toc_curr = addr;
9881 }
9882
9883 /* toc_curr is the base address of this toc group. Set elf_gp
9884 for the input section to be the offset relative to the
9885 output toc base plus 0x8000. Making the input elf_gp an
9886 offset allows us to move the toc as a whole without
9887 recalculating input elf_gp. */
9888 off = htab->toc_curr - elf_gp (isec->output_section->owner);
9889 off += TOC_BASE_OFF;
9890
9891 /* Die if someone uses a linker script that doesn't keep input
9892 file .toc and .got together. */
9893 if (elf_gp (isec->owner) != 0
9894 && elf_gp (isec->owner) != off)
9895 return FALSE;
9896
9897 elf_gp (isec->owner) = off;
9898 return TRUE;
9899 }
9900
9901 /* During the second pass toc_first_sec points to the start of
9902 a toc group, and toc_curr is used to track the old elf_gp.
9903 We use toc_bfd to ensure we only look at each bfd once. */
9904 if (htab->toc_bfd == isec->owner)
9905 return TRUE;
9906 htab->toc_bfd = isec->owner;
9907
9908 if (htab->toc_first_sec == NULL
9909 || htab->toc_curr != elf_gp (isec->owner))
9910 {
9911 htab->toc_curr = elf_gp (isec->owner);
9912 htab->toc_first_sec = isec;
9913 }
9914 addr = (htab->toc_first_sec->output_offset
9915 + htab->toc_first_sec->output_section->vma);
9916 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
9917 elf_gp (isec->owner) = off;
9918
9919 return TRUE;
9920 }
9921
9922 /* Called via elf_link_hash_traverse to merge GOT entries for global
9923 symbol H. */
9924
9925 static bfd_boolean
9926 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9927 {
9928 if (h->root.type == bfd_link_hash_indirect)
9929 return TRUE;
9930
9931 if (h->root.type == bfd_link_hash_warning)
9932 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9933
9934 merge_got_entries (&h->got.glist);
9935
9936 return TRUE;
9937 }
9938
9939 /* Called via elf_link_hash_traverse to allocate GOT entries for global
9940 symbol H. */
9941
9942 static bfd_boolean
9943 reallocate_got (struct elf_link_hash_entry *h, void *inf)
9944 {
9945 struct got_entry *gent;
9946
9947 if (h->root.type == bfd_link_hash_indirect)
9948 return TRUE;
9949
9950 if (h->root.type == bfd_link_hash_warning)
9951 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9952
9953 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9954 if (!gent->is_indirect)
9955 allocate_got (h, (struct bfd_link_info *) inf, gent);
9956 return TRUE;
9957 }
9958
9959 /* Called on the first multitoc pass after the last call to
9960 ppc64_elf_next_toc_section. This function removes duplicate GOT
9961 entries. */
9962
9963 bfd_boolean
9964 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
9965 {
9966 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9967 struct bfd *ibfd, *ibfd2;
9968 bfd_boolean done_something;
9969
9970 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
9971
9972 if (!htab->do_multi_toc)
9973 return FALSE;
9974
9975 /* Merge global sym got entries within a toc group. */
9976 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
9977
9978 /* And tlsld_got. */
9979 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9980 {
9981 struct got_entry *ent, *ent2;
9982
9983 if (!is_ppc64_elf (ibfd))
9984 continue;
9985
9986 ent = ppc64_tlsld_got (ibfd);
9987 if (!ent->is_indirect
9988 && ent->got.offset != (bfd_vma) -1)
9989 {
9990 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
9991 {
9992 if (!is_ppc64_elf (ibfd2))
9993 continue;
9994
9995 ent2 = ppc64_tlsld_got (ibfd2);
9996 if (!ent2->is_indirect
9997 && ent2->got.offset != (bfd_vma) -1
9998 && elf_gp (ibfd2) == elf_gp (ibfd))
9999 {
10000 ent2->is_indirect = TRUE;
10001 ent2->got.ent = ent;
10002 }
10003 }
10004 }
10005 }
10006
10007 /* Zap sizes of got sections. */
10008 htab->reliplt->rawsize = htab->reliplt->size;
10009 htab->reliplt->size -= htab->got_reli_size;
10010 htab->got_reli_size = 0;
10011
10012 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10013 {
10014 asection *got, *relgot;
10015
10016 if (!is_ppc64_elf (ibfd))
10017 continue;
10018
10019 got = ppc64_elf_tdata (ibfd)->got;
10020 if (got != NULL)
10021 {
10022 got->rawsize = got->size;
10023 got->size = 0;
10024 relgot = ppc64_elf_tdata (ibfd)->relgot;
10025 relgot->rawsize = relgot->size;
10026 relgot->size = 0;
10027 }
10028 }
10029
10030 /* Now reallocate the got, local syms first. We don't need to
10031 allocate section contents again since we never increase size. */
10032 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10033 {
10034 struct got_entry **lgot_ents;
10035 struct got_entry **end_lgot_ents;
10036 struct plt_entry **local_plt;
10037 struct plt_entry **end_local_plt;
10038 unsigned char *lgot_masks;
10039 bfd_size_type locsymcount;
10040 Elf_Internal_Shdr *symtab_hdr;
10041 asection *s, *srel;
10042
10043 if (!is_ppc64_elf (ibfd))
10044 continue;
10045
10046 lgot_ents = elf_local_got_ents (ibfd);
10047 if (!lgot_ents)
10048 continue;
10049
10050 symtab_hdr = &elf_symtab_hdr (ibfd);
10051 locsymcount = symtab_hdr->sh_info;
10052 end_lgot_ents = lgot_ents + locsymcount;
10053 local_plt = (struct plt_entry **) end_lgot_ents;
10054 end_local_plt = local_plt + locsymcount;
10055 lgot_masks = (unsigned char *) end_local_plt;
10056 s = ppc64_elf_tdata (ibfd)->got;
10057 srel = ppc64_elf_tdata (ibfd)->relgot;
10058 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10059 {
10060 struct got_entry *ent;
10061
10062 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10063 {
10064 unsigned int num = 1;
10065 ent->got.offset = s->size;
10066 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10067 num = 2;
10068 s->size += num * 8;
10069 if (info->shared)
10070 srel->size += num * sizeof (Elf64_External_Rela);
10071 else if ((*lgot_masks & PLT_IFUNC) != 0)
10072 {
10073 htab->reliplt->size
10074 += num * sizeof (Elf64_External_Rela);
10075 htab->got_reli_size
10076 += num * sizeof (Elf64_External_Rela);
10077 }
10078 }
10079 }
10080 }
10081
10082 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10083
10084 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10085 {
10086 struct got_entry *ent;
10087
10088 if (!is_ppc64_elf (ibfd))
10089 continue;
10090
10091 ent = ppc64_tlsld_got (ibfd);
10092 if (!ent->is_indirect
10093 && ent->got.offset != (bfd_vma) -1)
10094 {
10095 asection *s = ppc64_elf_tdata (ibfd)->got;
10096 ent->got.offset = s->size;
10097 s->size += 16;
10098 if (info->shared)
10099 {
10100 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10101 srel->size += sizeof (Elf64_External_Rela);
10102 }
10103 }
10104 }
10105
10106 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10107 if (!done_something)
10108 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10109 {
10110 asection *got;
10111
10112 if (!is_ppc64_elf (ibfd))
10113 continue;
10114
10115 got = ppc64_elf_tdata (ibfd)->got;
10116 if (got != NULL)
10117 {
10118 done_something = got->rawsize != got->size;
10119 if (done_something)
10120 break;
10121 }
10122 }
10123
10124 if (done_something)
10125 (*htab->layout_sections_again) ();
10126
10127 /* Set up for second pass over toc sections to recalculate elf_gp
10128 on input sections. */
10129 htab->toc_bfd = NULL;
10130 htab->toc_first_sec = NULL;
10131 htab->second_toc_pass = TRUE;
10132 return done_something;
10133 }
10134
10135 /* Called after second pass of multitoc partitioning. */
10136
10137 void
10138 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10139 {
10140 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10141
10142 /* After the second pass, toc_curr tracks the TOC offset used
10143 for code sections below in ppc64_elf_next_input_section. */
10144 htab->toc_curr = TOC_BASE_OFF;
10145 }
10146
10147 /* No toc references were found in ISEC. If the code in ISEC makes no
10148 calls, then there's no need to use toc adjusting stubs when branching
10149 into ISEC. Actually, indirect calls from ISEC are OK as they will
10150 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10151 needed, and 2 if a cyclical call-graph was found but no other reason
10152 for a stub was detected. If called from the top level, a return of
10153 2 means the same as a return of 0. */
10154
10155 static int
10156 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10157 {
10158 int ret;
10159
10160 /* Mark this section as checked. */
10161 isec->call_check_done = 1;
10162
10163 /* We know none of our code bearing sections will need toc stubs. */
10164 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10165 return 0;
10166
10167 if (isec->size == 0)
10168 return 0;
10169
10170 if (isec->output_section == NULL)
10171 return 0;
10172
10173 ret = 0;
10174 if (isec->reloc_count != 0)
10175 {
10176 Elf_Internal_Rela *relstart, *rel;
10177 Elf_Internal_Sym *local_syms;
10178 struct ppc_link_hash_table *htab;
10179
10180 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10181 info->keep_memory);
10182 if (relstart == NULL)
10183 return -1;
10184
10185 /* Look for branches to outside of this section. */
10186 local_syms = NULL;
10187 htab = ppc_hash_table (info);
10188 if (htab == NULL)
10189 return -1;
10190
10191 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10192 {
10193 enum elf_ppc64_reloc_type r_type;
10194 unsigned long r_symndx;
10195 struct elf_link_hash_entry *h;
10196 struct ppc_link_hash_entry *eh;
10197 Elf_Internal_Sym *sym;
10198 asection *sym_sec;
10199 struct _opd_sec_data *opd;
10200 bfd_vma sym_value;
10201 bfd_vma dest;
10202
10203 r_type = ELF64_R_TYPE (rel->r_info);
10204 if (r_type != R_PPC64_REL24
10205 && r_type != R_PPC64_REL14
10206 && r_type != R_PPC64_REL14_BRTAKEN
10207 && r_type != R_PPC64_REL14_BRNTAKEN)
10208 continue;
10209
10210 r_symndx = ELF64_R_SYM (rel->r_info);
10211 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10212 isec->owner))
10213 {
10214 ret = -1;
10215 break;
10216 }
10217
10218 /* Calls to dynamic lib functions go through a plt call stub
10219 that uses r2. */
10220 eh = (struct ppc_link_hash_entry *) h;
10221 if (eh != NULL
10222 && (eh->elf.plt.plist != NULL
10223 || (eh->oh != NULL
10224 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10225 {
10226 ret = 1;
10227 break;
10228 }
10229
10230 if (sym_sec == NULL)
10231 /* Ignore other undefined symbols. */
10232 continue;
10233
10234 /* Assume branches to other sections not included in the
10235 link need stubs too, to cover -R and absolute syms. */
10236 if (sym_sec->output_section == NULL)
10237 {
10238 ret = 1;
10239 break;
10240 }
10241
10242 if (h == NULL)
10243 sym_value = sym->st_value;
10244 else
10245 {
10246 if (h->root.type != bfd_link_hash_defined
10247 && h->root.type != bfd_link_hash_defweak)
10248 abort ();
10249 sym_value = h->root.u.def.value;
10250 }
10251 sym_value += rel->r_addend;
10252
10253 /* If this branch reloc uses an opd sym, find the code section. */
10254 opd = get_opd_info (sym_sec);
10255 if (opd != NULL)
10256 {
10257 if (h == NULL && opd->adjust != NULL)
10258 {
10259 long adjust;
10260
10261 adjust = opd->adjust[sym->st_value / 8];
10262 if (adjust == -1)
10263 /* Assume deleted functions won't ever be called. */
10264 continue;
10265 sym_value += adjust;
10266 }
10267
10268 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10269 if (dest == (bfd_vma) -1)
10270 continue;
10271 }
10272 else
10273 dest = (sym_value
10274 + sym_sec->output_offset
10275 + sym_sec->output_section->vma);
10276
10277 /* Ignore branch to self. */
10278 if (sym_sec == isec)
10279 continue;
10280
10281 /* If the called function uses the toc, we need a stub. */
10282 if (sym_sec->has_toc_reloc
10283 || sym_sec->makes_toc_func_call)
10284 {
10285 ret = 1;
10286 break;
10287 }
10288
10289 /* Assume any branch that needs a long branch stub might in fact
10290 need a plt_branch stub. A plt_branch stub uses r2. */
10291 else if (dest - (isec->output_offset
10292 + isec->output_section->vma
10293 + rel->r_offset) + (1 << 25) >= (2 << 25))
10294 {
10295 ret = 1;
10296 break;
10297 }
10298
10299 /* If calling back to a section in the process of being
10300 tested, we can't say for sure that no toc adjusting stubs
10301 are needed, so don't return zero. */
10302 else if (sym_sec->call_check_in_progress)
10303 ret = 2;
10304
10305 /* Branches to another section that itself doesn't have any TOC
10306 references are OK. Recursively call ourselves to check. */
10307 else if (!sym_sec->call_check_done)
10308 {
10309 int recur;
10310
10311 /* Mark current section as indeterminate, so that other
10312 sections that call back to current won't be marked as
10313 known. */
10314 isec->call_check_in_progress = 1;
10315 recur = toc_adjusting_stub_needed (info, sym_sec);
10316 isec->call_check_in_progress = 0;
10317
10318 if (recur != 0)
10319 {
10320 ret = recur;
10321 if (recur != 2)
10322 break;
10323 }
10324 }
10325 }
10326
10327 if (local_syms != NULL
10328 && (elf_symtab_hdr (isec->owner).contents
10329 != (unsigned char *) local_syms))
10330 free (local_syms);
10331 if (elf_section_data (isec)->relocs != relstart)
10332 free (relstart);
10333 }
10334
10335 if ((ret & 1) == 0
10336 && isec->map_head.s != NULL
10337 && (strcmp (isec->output_section->name, ".init") == 0
10338 || strcmp (isec->output_section->name, ".fini") == 0))
10339 {
10340 if (isec->map_head.s->has_toc_reloc
10341 || isec->map_head.s->makes_toc_func_call)
10342 ret = 1;
10343 else if (!isec->map_head.s->call_check_done)
10344 {
10345 int recur;
10346 isec->call_check_in_progress = 1;
10347 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10348 isec->call_check_in_progress = 0;
10349 if (recur != 0)
10350 ret = recur;
10351 }
10352 }
10353
10354 if (ret == 1)
10355 isec->makes_toc_func_call = 1;
10356
10357 return ret;
10358 }
10359
10360 /* The linker repeatedly calls this function for each input section,
10361 in the order that input sections are linked into output sections.
10362 Build lists of input sections to determine groupings between which
10363 we may insert linker stubs. */
10364
10365 bfd_boolean
10366 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10367 {
10368 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10369
10370 if (htab == NULL)
10371 return FALSE;
10372
10373 if ((isec->output_section->flags & SEC_CODE) != 0
10374 && isec->output_section->index <= htab->top_index)
10375 {
10376 asection **list = htab->input_list + isec->output_section->index;
10377 /* Steal the link_sec pointer for our list. */
10378 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10379 /* This happens to make the list in reverse order,
10380 which is what we want. */
10381 PREV_SEC (isec) = *list;
10382 *list = isec;
10383 }
10384
10385 if (htab->multi_toc_needed)
10386 {
10387 /* If a code section has a function that uses the TOC then we need
10388 to use the right TOC (obviously). Also, make sure that .opd gets
10389 the correct TOC value for R_PPC64_TOC relocs that don't have or
10390 can't find their function symbol (shouldn't ever happen now).
10391 Also specially treat .fixup for the linux kernel. .fixup
10392 contains branches, but only back to the function that hit an
10393 exception. */
10394 if (isec->has_toc_reloc
10395 || (isec->flags & SEC_CODE) == 0
10396 || strcmp (isec->name, ".fixup") == 0)
10397 {
10398 if (elf_gp (isec->owner) != 0)
10399 htab->toc_curr = elf_gp (isec->owner);
10400 }
10401 else if (!isec->call_check_done
10402 && toc_adjusting_stub_needed (info, isec) < 0)
10403 return FALSE;
10404 }
10405
10406 /* Functions that don't use the TOC can belong in any TOC group.
10407 Use the last TOC base. This happens to make _init and _fini
10408 pasting work, because the fragments generally don't use the TOC. */
10409 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10410 return TRUE;
10411 }
10412
10413 /* Check that all .init and .fini sections use the same toc, if they
10414 have toc relocs. */
10415
10416 static bfd_boolean
10417 check_pasted_section (struct bfd_link_info *info, const char *name)
10418 {
10419 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10420
10421 if (o != NULL)
10422 {
10423 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10424 bfd_vma toc_off = 0;
10425 asection *i;
10426
10427 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10428 if (i->has_toc_reloc)
10429 {
10430 if (toc_off == 0)
10431 toc_off = htab->stub_group[i->id].toc_off;
10432 else if (toc_off != htab->stub_group[i->id].toc_off)
10433 return FALSE;
10434 }
10435 /* Make sure the whole pasted function uses the same toc offset. */
10436 if (toc_off != 0)
10437 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10438 htab->stub_group[i->id].toc_off = toc_off;
10439 }
10440 return TRUE;
10441 }
10442
10443 bfd_boolean
10444 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10445 {
10446 return (check_pasted_section (info, ".init")
10447 & check_pasted_section (info, ".fini"));
10448 }
10449
10450 /* See whether we can group stub sections together. Grouping stub
10451 sections may result in fewer stubs. More importantly, we need to
10452 put all .init* and .fini* stubs at the beginning of the .init or
10453 .fini output sections respectively, because glibc splits the
10454 _init and _fini functions into multiple parts. Putting a stub in
10455 the middle of a function is not a good idea. */
10456
10457 static void
10458 group_sections (struct ppc_link_hash_table *htab,
10459 bfd_size_type stub_group_size,
10460 bfd_boolean stubs_always_before_branch)
10461 {
10462 asection **list;
10463 bfd_size_type stub14_group_size;
10464 bfd_boolean suppress_size_errors;
10465
10466 suppress_size_errors = FALSE;
10467 stub14_group_size = stub_group_size;
10468 if (stub_group_size == 1)
10469 {
10470 /* Default values. */
10471 if (stubs_always_before_branch)
10472 {
10473 stub_group_size = 0x1e00000;
10474 stub14_group_size = 0x7800;
10475 }
10476 else
10477 {
10478 stub_group_size = 0x1c00000;
10479 stub14_group_size = 0x7000;
10480 }
10481 suppress_size_errors = TRUE;
10482 }
10483
10484 list = htab->input_list + htab->top_index;
10485 do
10486 {
10487 asection *tail = *list;
10488 while (tail != NULL)
10489 {
10490 asection *curr;
10491 asection *prev;
10492 bfd_size_type total;
10493 bfd_boolean big_sec;
10494 bfd_vma curr_toc;
10495
10496 curr = tail;
10497 total = tail->size;
10498 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
10499 ? stub14_group_size : stub_group_size);
10500 if (big_sec && !suppress_size_errors)
10501 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10502 tail->owner, tail);
10503 curr_toc = htab->stub_group[tail->id].toc_off;
10504
10505 while ((prev = PREV_SEC (curr)) != NULL
10506 && ((total += curr->output_offset - prev->output_offset)
10507 < (ppc64_elf_section_data (prev)->has_14bit_branch
10508 ? stub14_group_size : stub_group_size))
10509 && htab->stub_group[prev->id].toc_off == curr_toc)
10510 curr = prev;
10511
10512 /* OK, the size from the start of CURR to the end is less
10513 than stub_group_size and thus can be handled by one stub
10514 section. (or the tail section is itself larger than
10515 stub_group_size, in which case we may be toast.) We
10516 should really be keeping track of the total size of stubs
10517 added here, as stubs contribute to the final output
10518 section size. That's a little tricky, and this way will
10519 only break if stubs added make the total size more than
10520 2^25, ie. for the default stub_group_size, if stubs total
10521 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10522 do
10523 {
10524 prev = PREV_SEC (tail);
10525 /* Set up this stub group. */
10526 htab->stub_group[tail->id].link_sec = curr;
10527 }
10528 while (tail != curr && (tail = prev) != NULL);
10529
10530 /* But wait, there's more! Input sections up to stub_group_size
10531 bytes before the stub section can be handled by it too.
10532 Don't do this if we have a really large section after the
10533 stubs, as adding more stubs increases the chance that
10534 branches may not reach into the stub section. */
10535 if (!stubs_always_before_branch && !big_sec)
10536 {
10537 total = 0;
10538 while (prev != NULL
10539 && ((total += tail->output_offset - prev->output_offset)
10540 < (ppc64_elf_section_data (prev)->has_14bit_branch
10541 ? stub14_group_size : stub_group_size))
10542 && htab->stub_group[prev->id].toc_off == curr_toc)
10543 {
10544 tail = prev;
10545 prev = PREV_SEC (tail);
10546 htab->stub_group[tail->id].link_sec = curr;
10547 }
10548 }
10549 tail = prev;
10550 }
10551 }
10552 while (list-- != htab->input_list);
10553 free (htab->input_list);
10554 #undef PREV_SEC
10555 }
10556
10557 /* Determine and set the size of the stub section for a final link.
10558
10559 The basic idea here is to examine all the relocations looking for
10560 PC-relative calls to a target that is unreachable with a "bl"
10561 instruction. */
10562
10563 bfd_boolean
10564 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10565 {
10566 bfd_size_type stub_group_size;
10567 bfd_boolean stubs_always_before_branch;
10568 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10569
10570 if (htab == NULL)
10571 return FALSE;
10572
10573 stubs_always_before_branch = group_size < 0;
10574 if (group_size < 0)
10575 stub_group_size = -group_size;
10576 else
10577 stub_group_size = group_size;
10578
10579 group_sections (htab, stub_group_size, stubs_always_before_branch);
10580
10581 while (1)
10582 {
10583 bfd *input_bfd;
10584 unsigned int bfd_indx;
10585 asection *stub_sec;
10586
10587 htab->stub_iteration += 1;
10588
10589 for (input_bfd = info->input_bfds, bfd_indx = 0;
10590 input_bfd != NULL;
10591 input_bfd = input_bfd->link_next, bfd_indx++)
10592 {
10593 Elf_Internal_Shdr *symtab_hdr;
10594 asection *section;
10595 Elf_Internal_Sym *local_syms = NULL;
10596
10597 if (!is_ppc64_elf (input_bfd))
10598 continue;
10599
10600 /* We'll need the symbol table in a second. */
10601 symtab_hdr = &elf_symtab_hdr (input_bfd);
10602 if (symtab_hdr->sh_info == 0)
10603 continue;
10604
10605 /* Walk over each section attached to the input bfd. */
10606 for (section = input_bfd->sections;
10607 section != NULL;
10608 section = section->next)
10609 {
10610 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10611
10612 /* If there aren't any relocs, then there's nothing more
10613 to do. */
10614 if ((section->flags & SEC_RELOC) == 0
10615 || (section->flags & SEC_ALLOC) == 0
10616 || (section->flags & SEC_LOAD) == 0
10617 || (section->flags & SEC_CODE) == 0
10618 || section->reloc_count == 0)
10619 continue;
10620
10621 /* If this section is a link-once section that will be
10622 discarded, then don't create any stubs. */
10623 if (section->output_section == NULL
10624 || section->output_section->owner != info->output_bfd)
10625 continue;
10626
10627 /* Get the relocs. */
10628 internal_relocs
10629 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10630 info->keep_memory);
10631 if (internal_relocs == NULL)
10632 goto error_ret_free_local;
10633
10634 /* Now examine each relocation. */
10635 irela = internal_relocs;
10636 irelaend = irela + section->reloc_count;
10637 for (; irela < irelaend; irela++)
10638 {
10639 enum elf_ppc64_reloc_type r_type;
10640 unsigned int r_indx;
10641 enum ppc_stub_type stub_type;
10642 struct ppc_stub_hash_entry *stub_entry;
10643 asection *sym_sec, *code_sec;
10644 bfd_vma sym_value, code_value;
10645 bfd_vma destination;
10646 bfd_boolean ok_dest;
10647 struct ppc_link_hash_entry *hash;
10648 struct ppc_link_hash_entry *fdh;
10649 struct elf_link_hash_entry *h;
10650 Elf_Internal_Sym *sym;
10651 char *stub_name;
10652 const asection *id_sec;
10653 struct _opd_sec_data *opd;
10654 struct plt_entry *plt_ent;
10655
10656 r_type = ELF64_R_TYPE (irela->r_info);
10657 r_indx = ELF64_R_SYM (irela->r_info);
10658
10659 if (r_type >= R_PPC64_max)
10660 {
10661 bfd_set_error (bfd_error_bad_value);
10662 goto error_ret_free_internal;
10663 }
10664
10665 /* Only look for stubs on branch instructions. */
10666 if (r_type != R_PPC64_REL24
10667 && r_type != R_PPC64_REL14
10668 && r_type != R_PPC64_REL14_BRTAKEN
10669 && r_type != R_PPC64_REL14_BRNTAKEN)
10670 continue;
10671
10672 /* Now determine the call target, its name, value,
10673 section. */
10674 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10675 r_indx, input_bfd))
10676 goto error_ret_free_internal;
10677 hash = (struct ppc_link_hash_entry *) h;
10678
10679 ok_dest = FALSE;
10680 fdh = NULL;
10681 sym_value = 0;
10682 if (hash == NULL)
10683 {
10684 sym_value = sym->st_value;
10685 ok_dest = TRUE;
10686 }
10687 else if (hash->elf.root.type == bfd_link_hash_defined
10688 || hash->elf.root.type == bfd_link_hash_defweak)
10689 {
10690 sym_value = hash->elf.root.u.def.value;
10691 if (sym_sec->output_section != NULL)
10692 ok_dest = TRUE;
10693 }
10694 else if (hash->elf.root.type == bfd_link_hash_undefweak
10695 || hash->elf.root.type == bfd_link_hash_undefined)
10696 {
10697 /* Recognise an old ABI func code entry sym, and
10698 use the func descriptor sym instead if it is
10699 defined. */
10700 if (hash->elf.root.root.string[0] == '.'
10701 && (fdh = lookup_fdh (hash, htab)) != NULL)
10702 {
10703 if (fdh->elf.root.type == bfd_link_hash_defined
10704 || fdh->elf.root.type == bfd_link_hash_defweak)
10705 {
10706 sym_sec = fdh->elf.root.u.def.section;
10707 sym_value = fdh->elf.root.u.def.value;
10708 if (sym_sec->output_section != NULL)
10709 ok_dest = TRUE;
10710 }
10711 else
10712 fdh = NULL;
10713 }
10714 }
10715 else
10716 {
10717 bfd_set_error (bfd_error_bad_value);
10718 goto error_ret_free_internal;
10719 }
10720
10721 destination = 0;
10722 if (ok_dest)
10723 {
10724 sym_value += irela->r_addend;
10725 destination = (sym_value
10726 + sym_sec->output_offset
10727 + sym_sec->output_section->vma);
10728 }
10729
10730 code_sec = sym_sec;
10731 code_value = sym_value;
10732 opd = get_opd_info (sym_sec);
10733 if (opd != NULL)
10734 {
10735 bfd_vma dest;
10736
10737 if (hash == NULL && opd->adjust != NULL)
10738 {
10739 long adjust = opd->adjust[sym_value / 8];
10740 if (adjust == -1)
10741 continue;
10742 code_value += adjust;
10743 sym_value += adjust;
10744 }
10745 dest = opd_entry_value (sym_sec, sym_value,
10746 &code_sec, &code_value);
10747 if (dest != (bfd_vma) -1)
10748 {
10749 destination = dest;
10750 if (fdh != NULL)
10751 {
10752 /* Fixup old ABI sym to point at code
10753 entry. */
10754 hash->elf.root.type = bfd_link_hash_defweak;
10755 hash->elf.root.u.def.section = code_sec;
10756 hash->elf.root.u.def.value = code_value;
10757 }
10758 }
10759 }
10760
10761 /* Determine what (if any) linker stub is needed. */
10762 plt_ent = NULL;
10763 stub_type = ppc_type_of_stub (section, irela, &hash,
10764 &plt_ent, destination);
10765
10766 if (stub_type != ppc_stub_plt_call)
10767 {
10768 /* Check whether we need a TOC adjusting stub.
10769 Since the linker pastes together pieces from
10770 different object files when creating the
10771 _init and _fini functions, it may be that a
10772 call to what looks like a local sym is in
10773 fact a call needing a TOC adjustment. */
10774 if (code_sec != NULL
10775 && code_sec->output_section != NULL
10776 && (htab->stub_group[code_sec->id].toc_off
10777 != htab->stub_group[section->id].toc_off)
10778 && (code_sec->has_toc_reloc
10779 || code_sec->makes_toc_func_call))
10780 stub_type = ppc_stub_long_branch_r2off;
10781 }
10782
10783 if (stub_type == ppc_stub_none)
10784 continue;
10785
10786 /* __tls_get_addr calls might be eliminated. */
10787 if (stub_type != ppc_stub_plt_call
10788 && hash != NULL
10789 && (hash == htab->tls_get_addr
10790 || hash == htab->tls_get_addr_fd)
10791 && section->has_tls_reloc
10792 && irela != internal_relocs)
10793 {
10794 /* Get tls info. */
10795 unsigned char *tls_mask;
10796
10797 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10798 irela - 1, input_bfd))
10799 goto error_ret_free_internal;
10800 if (*tls_mask != 0)
10801 continue;
10802 }
10803
10804 /* Support for grouping stub sections. */
10805 id_sec = htab->stub_group[section->id].link_sec;
10806
10807 /* Get the name of this stub. */
10808 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10809 if (!stub_name)
10810 goto error_ret_free_internal;
10811
10812 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10813 stub_name, FALSE, FALSE);
10814 if (stub_entry != NULL)
10815 {
10816 /* The proper stub has already been created. */
10817 free (stub_name);
10818 continue;
10819 }
10820
10821 stub_entry = ppc_add_stub (stub_name, section, htab);
10822 if (stub_entry == NULL)
10823 {
10824 free (stub_name);
10825 error_ret_free_internal:
10826 if (elf_section_data (section)->relocs == NULL)
10827 free (internal_relocs);
10828 error_ret_free_local:
10829 if (local_syms != NULL
10830 && (symtab_hdr->contents
10831 != (unsigned char *) local_syms))
10832 free (local_syms);
10833 return FALSE;
10834 }
10835
10836 stub_entry->stub_type = stub_type;
10837 if (stub_type != ppc_stub_plt_call)
10838 {
10839 stub_entry->target_value = code_value;
10840 stub_entry->target_section = code_sec;
10841 }
10842 else
10843 {
10844 stub_entry->target_value = sym_value;
10845 stub_entry->target_section = sym_sec;
10846 }
10847 stub_entry->h = hash;
10848 stub_entry->plt_ent = plt_ent;
10849 stub_entry->addend = irela->r_addend;
10850
10851 if (stub_entry->h != NULL)
10852 htab->stub_globals += 1;
10853 }
10854
10855 /* We're done with the internal relocs, free them. */
10856 if (elf_section_data (section)->relocs != internal_relocs)
10857 free (internal_relocs);
10858 }
10859
10860 if (local_syms != NULL
10861 && symtab_hdr->contents != (unsigned char *) local_syms)
10862 {
10863 if (!info->keep_memory)
10864 free (local_syms);
10865 else
10866 symtab_hdr->contents = (unsigned char *) local_syms;
10867 }
10868 }
10869
10870 /* We may have added some stubs. Find out the new size of the
10871 stub sections. */
10872 for (stub_sec = htab->stub_bfd->sections;
10873 stub_sec != NULL;
10874 stub_sec = stub_sec->next)
10875 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10876 {
10877 stub_sec->rawsize = stub_sec->size;
10878 stub_sec->size = 0;
10879 stub_sec->reloc_count = 0;
10880 stub_sec->flags &= ~SEC_RELOC;
10881 }
10882
10883 htab->brlt->size = 0;
10884 htab->brlt->reloc_count = 0;
10885 htab->brlt->flags &= ~SEC_RELOC;
10886 if (htab->relbrlt != NULL)
10887 htab->relbrlt->size = 0;
10888
10889 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10890
10891 if (info->emitrelocations
10892 && htab->glink != NULL && htab->glink->size != 0)
10893 {
10894 htab->glink->reloc_count = 1;
10895 htab->glink->flags |= SEC_RELOC;
10896 }
10897
10898 for (stub_sec = htab->stub_bfd->sections;
10899 stub_sec != NULL;
10900 stub_sec = stub_sec->next)
10901 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10902 && stub_sec->rawsize != stub_sec->size)
10903 break;
10904
10905 /* Exit from this loop when no stubs have been added, and no stubs
10906 have changed size. */
10907 if (stub_sec == NULL)
10908 break;
10909
10910 /* Ask the linker to do its stuff. */
10911 (*htab->layout_sections_again) ();
10912 }
10913
10914 /* It would be nice to strip htab->brlt from the output if the
10915 section is empty, but it's too late. If we strip sections here,
10916 the dynamic symbol table is corrupted since the section symbol
10917 for the stripped section isn't written. */
10918
10919 return TRUE;
10920 }
10921
10922 /* Called after we have determined section placement. If sections
10923 move, we'll be called again. Provide a value for TOCstart. */
10924
10925 bfd_vma
10926 ppc64_elf_toc (bfd *obfd)
10927 {
10928 asection *s;
10929 bfd_vma TOCstart;
10930
10931 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10932 order. The TOC starts where the first of these sections starts. */
10933 s = bfd_get_section_by_name (obfd, ".got");
10934 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10935 s = bfd_get_section_by_name (obfd, ".toc");
10936 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10937 s = bfd_get_section_by_name (obfd, ".tocbss");
10938 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10939 s = bfd_get_section_by_name (obfd, ".plt");
10940 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10941 {
10942 /* This may happen for
10943 o references to TOC base (SYM@toc / TOC[tc0]) without a
10944 .toc directive
10945 o bad linker script
10946 o --gc-sections and empty TOC sections
10947
10948 FIXME: Warn user? */
10949
10950 /* Look for a likely section. We probably won't even be
10951 using TOCstart. */
10952 for (s = obfd->sections; s != NULL; s = s->next)
10953 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10954 | SEC_EXCLUDE))
10955 == (SEC_ALLOC | SEC_SMALL_DATA))
10956 break;
10957 if (s == NULL)
10958 for (s = obfd->sections; s != NULL; s = s->next)
10959 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10960 == (SEC_ALLOC | SEC_SMALL_DATA))
10961 break;
10962 if (s == NULL)
10963 for (s = obfd->sections; s != NULL; s = s->next)
10964 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10965 == SEC_ALLOC)
10966 break;
10967 if (s == NULL)
10968 for (s = obfd->sections; s != NULL; s = s->next)
10969 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10970 break;
10971 }
10972
10973 TOCstart = 0;
10974 if (s != NULL)
10975 TOCstart = s->output_section->vma + s->output_offset;
10976
10977 return TOCstart;
10978 }
10979
10980 /* Build all the stubs associated with the current output file.
10981 The stubs are kept in a hash table attached to the main linker
10982 hash table. This function is called via gldelf64ppc_finish. */
10983
10984 bfd_boolean
10985 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10986 struct bfd_link_info *info,
10987 char **stats)
10988 {
10989 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10990 asection *stub_sec;
10991 bfd_byte *p;
10992 int stub_sec_count = 0;
10993
10994 if (htab == NULL)
10995 return FALSE;
10996
10997 htab->emit_stub_syms = emit_stub_syms;
10998
10999 /* Allocate memory to hold the linker stubs. */
11000 for (stub_sec = htab->stub_bfd->sections;
11001 stub_sec != NULL;
11002 stub_sec = stub_sec->next)
11003 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11004 && stub_sec->size != 0)
11005 {
11006 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11007 if (stub_sec->contents == NULL)
11008 return FALSE;
11009 /* We want to check that built size is the same as calculated
11010 size. rawsize is a convenient location to use. */
11011 stub_sec->rawsize = stub_sec->size;
11012 stub_sec->size = 0;
11013 }
11014
11015 if (htab->glink != NULL && htab->glink->size != 0)
11016 {
11017 unsigned int indx;
11018 bfd_vma plt0;
11019
11020 /* Build the .glink plt call stub. */
11021 if (htab->emit_stub_syms)
11022 {
11023 struct elf_link_hash_entry *h;
11024 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11025 TRUE, FALSE, FALSE);
11026 if (h == NULL)
11027 return FALSE;
11028 if (h->root.type == bfd_link_hash_new)
11029 {
11030 h->root.type = bfd_link_hash_defined;
11031 h->root.u.def.section = htab->glink;
11032 h->root.u.def.value = 8;
11033 h->ref_regular = 1;
11034 h->def_regular = 1;
11035 h->ref_regular_nonweak = 1;
11036 h->forced_local = 1;
11037 h->non_elf = 0;
11038 }
11039 }
11040 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11041 if (info->emitrelocations)
11042 {
11043 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11044 if (r == NULL)
11045 return FALSE;
11046 r->r_offset = (htab->glink->output_offset
11047 + htab->glink->output_section->vma);
11048 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11049 r->r_addend = plt0;
11050 }
11051 p = htab->glink->contents;
11052 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11053 bfd_put_64 (htab->glink->owner, plt0, p);
11054 p += 8;
11055 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11056 p += 4;
11057 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11058 p += 4;
11059 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11060 p += 4;
11061 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11062 p += 4;
11063 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11064 p += 4;
11065 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11066 p += 4;
11067 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11068 p += 4;
11069 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11070 p += 4;
11071 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11072 p += 4;
11073 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11074 p += 4;
11075 bfd_put_32 (htab->glink->owner, BCTR, p);
11076 p += 4;
11077 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11078 {
11079 bfd_put_32 (htab->glink->owner, NOP, p);
11080 p += 4;
11081 }
11082
11083 /* Build the .glink lazy link call stubs. */
11084 indx = 0;
11085 while (p < htab->glink->contents + htab->glink->size)
11086 {
11087 if (indx < 0x8000)
11088 {
11089 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11090 p += 4;
11091 }
11092 else
11093 {
11094 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11095 p += 4;
11096 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11097 p += 4;
11098 }
11099 bfd_put_32 (htab->glink->owner,
11100 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11101 indx++;
11102 p += 4;
11103 }
11104 htab->glink->rawsize = p - htab->glink->contents;
11105 }
11106
11107 if (htab->brlt->size != 0)
11108 {
11109 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11110 htab->brlt->size);
11111 if (htab->brlt->contents == NULL)
11112 return FALSE;
11113 }
11114 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11115 {
11116 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11117 htab->relbrlt->size);
11118 if (htab->relbrlt->contents == NULL)
11119 return FALSE;
11120 }
11121
11122 /* Build the stubs as directed by the stub hash table. */
11123 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11124
11125 if (htab->relbrlt != NULL)
11126 htab->relbrlt->reloc_count = 0;
11127
11128 for (stub_sec = htab->stub_bfd->sections;
11129 stub_sec != NULL;
11130 stub_sec = stub_sec->next)
11131 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11132 {
11133 stub_sec_count += 1;
11134 if (stub_sec->rawsize != stub_sec->size)
11135 break;
11136 }
11137
11138 if (stub_sec != NULL
11139 || htab->glink->rawsize != htab->glink->size)
11140 {
11141 htab->stub_error = TRUE;
11142 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11143 }
11144
11145 if (htab->stub_error)
11146 return FALSE;
11147
11148 if (stats != NULL)
11149 {
11150 *stats = bfd_malloc (500);
11151 if (*stats == NULL)
11152 return FALSE;
11153
11154 sprintf (*stats, _("linker stubs in %u group%s\n"
11155 " branch %lu\n"
11156 " toc adjust %lu\n"
11157 " long branch %lu\n"
11158 " long toc adj %lu\n"
11159 " plt call %lu"),
11160 stub_sec_count,
11161 stub_sec_count == 1 ? "" : "s",
11162 htab->stub_count[ppc_stub_long_branch - 1],
11163 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11164 htab->stub_count[ppc_stub_plt_branch - 1],
11165 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11166 htab->stub_count[ppc_stub_plt_call - 1]);
11167 }
11168 return TRUE;
11169 }
11170
11171 /* This function undoes the changes made by add_symbol_adjust. */
11172
11173 static bfd_boolean
11174 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11175 {
11176 struct ppc_link_hash_entry *eh;
11177
11178 if (h->root.type == bfd_link_hash_indirect)
11179 return TRUE;
11180
11181 if (h->root.type == bfd_link_hash_warning)
11182 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11183
11184 eh = (struct ppc_link_hash_entry *) h;
11185 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11186 return TRUE;
11187
11188 eh->elf.root.type = bfd_link_hash_undefined;
11189 return TRUE;
11190 }
11191
11192 void
11193 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11194 {
11195 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11196
11197 if (htab != NULL)
11198 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11199 }
11200
11201 /* What to do when ld finds relocations against symbols defined in
11202 discarded sections. */
11203
11204 static unsigned int
11205 ppc64_elf_action_discarded (asection *sec)
11206 {
11207 if (strcmp (".opd", sec->name) == 0)
11208 return 0;
11209
11210 if (strcmp (".toc", sec->name) == 0)
11211 return 0;
11212
11213 if (strcmp (".toc1", sec->name) == 0)
11214 return 0;
11215
11216 return _bfd_elf_default_action_discarded (sec);
11217 }
11218
11219 /* REL points to a low-part reloc on a bigtoc instruction sequence.
11220 Find the matching high-part reloc instruction and verify that it
11221 is addis REG,r2,x. If so, return a pointer to the high-part reloc. */
11222
11223 static const Elf_Internal_Rela *
11224 ha_reloc_match (const Elf_Internal_Rela *relocs,
11225 const Elf_Internal_Rela *rel,
11226 unsigned int reg,
11227 const bfd *input_bfd,
11228 const bfd_byte *contents)
11229 {
11230 enum elf_ppc64_reloc_type r_type, r_type_ha;
11231 bfd_vma r_info_ha, r_addend;
11232
11233 r_type = ELF64_R_TYPE (rel->r_info);
11234 switch (r_type)
11235 {
11236 case R_PPC64_GOT_TLSLD16_LO:
11237 case R_PPC64_GOT_TLSGD16_LO:
11238 case R_PPC64_GOT_TPREL16_LO_DS:
11239 case R_PPC64_GOT_DTPREL16_LO_DS:
11240 case R_PPC64_GOT16_LO:
11241 case R_PPC64_TOC16_LO:
11242 r_type_ha = r_type + 2;
11243 break;
11244 case R_PPC64_GOT16_LO_DS:
11245 r_type_ha = R_PPC64_GOT16_HA;
11246 break;
11247 case R_PPC64_TOC16_LO_DS:
11248 r_type_ha = R_PPC64_TOC16_HA;
11249 break;
11250 default:
11251 abort ();
11252 }
11253 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11254 r_addend = rel->r_addend;
11255
11256 while (--rel >= relocs)
11257 if (rel->r_info == r_info_ha
11258 && rel->r_addend == r_addend)
11259 {
11260 const bfd_byte *p = contents + (rel->r_offset & ~3);
11261 unsigned int insn = bfd_get_32 (input_bfd, p);
11262 if ((insn & ((0x3f << 26) | (0x1f << 16)))
11263 == ((15u << 26) | (2 << 16)) /* addis rt,r2,x */
11264 && (insn & (0x1f << 21)) == (reg << 21))
11265 return rel;
11266 break;
11267 }
11268 return NULL;
11269 }
11270
11271 /* The RELOCATE_SECTION function is called by the ELF backend linker
11272 to handle the relocations for a section.
11273
11274 The relocs are always passed as Rela structures; if the section
11275 actually uses Rel structures, the r_addend field will always be
11276 zero.
11277
11278 This function is responsible for adjust the section contents as
11279 necessary, and (if using Rela relocs and generating a
11280 relocatable output file) adjusting the reloc addend as
11281 necessary.
11282
11283 This function does not have to worry about setting the reloc
11284 address or the reloc symbol index.
11285
11286 LOCAL_SYMS is a pointer to the swapped in local symbols.
11287
11288 LOCAL_SECTIONS is an array giving the section in the input file
11289 corresponding to the st_shndx field of each local symbol.
11290
11291 The global hash table entry for the global symbols can be found
11292 via elf_sym_hashes (input_bfd).
11293
11294 When generating relocatable output, this function must handle
11295 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11296 going to be the section symbol corresponding to the output
11297 section, which means that the addend must be adjusted
11298 accordingly. */
11299
11300 static bfd_boolean
11301 ppc64_elf_relocate_section (bfd *output_bfd,
11302 struct bfd_link_info *info,
11303 bfd *input_bfd,
11304 asection *input_section,
11305 bfd_byte *contents,
11306 Elf_Internal_Rela *relocs,
11307 Elf_Internal_Sym *local_syms,
11308 asection **local_sections)
11309 {
11310 struct ppc_link_hash_table *htab;
11311 Elf_Internal_Shdr *symtab_hdr;
11312 struct elf_link_hash_entry **sym_hashes;
11313 Elf_Internal_Rela *rel;
11314 Elf_Internal_Rela *relend;
11315 Elf_Internal_Rela outrel;
11316 bfd_byte *loc;
11317 struct got_entry **local_got_ents;
11318 bfd_vma TOCstart;
11319 bfd_boolean ret = TRUE;
11320 bfd_boolean is_opd;
11321 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11322 bfd_boolean is_power4 = FALSE;
11323 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11324
11325 /* Initialize howto table if needed. */
11326 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11327 ppc_howto_init ();
11328
11329 htab = ppc_hash_table (info);
11330 if (htab == NULL)
11331 return FALSE;
11332
11333 /* Don't relocate stub sections. */
11334 if (input_section->owner == htab->stub_bfd)
11335 return TRUE;
11336
11337 BFD_ASSERT (is_ppc64_elf (input_bfd));
11338
11339 local_got_ents = elf_local_got_ents (input_bfd);
11340 TOCstart = elf_gp (output_bfd);
11341 symtab_hdr = &elf_symtab_hdr (input_bfd);
11342 sym_hashes = elf_sym_hashes (input_bfd);
11343 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11344
11345 rel = relocs;
11346 relend = relocs + input_section->reloc_count;
11347 for (; rel < relend; rel++)
11348 {
11349 enum elf_ppc64_reloc_type r_type;
11350 bfd_vma addend, orig_addend;
11351 bfd_reloc_status_type r;
11352 Elf_Internal_Sym *sym;
11353 asection *sec;
11354 struct elf_link_hash_entry *h_elf;
11355 struct ppc_link_hash_entry *h;
11356 struct ppc_link_hash_entry *fdh;
11357 const char *sym_name;
11358 unsigned long r_symndx, toc_symndx;
11359 bfd_vma toc_addend;
11360 unsigned char tls_mask, tls_gd, tls_type;
11361 unsigned char sym_type;
11362 bfd_vma relocation;
11363 bfd_boolean unresolved_reloc;
11364 bfd_boolean warned;
11365 unsigned int insn;
11366 bfd_vma mask;
11367 struct ppc_stub_hash_entry *stub_entry;
11368 bfd_vma max_br_offset;
11369 bfd_vma from;
11370
11371 r_type = ELF64_R_TYPE (rel->r_info);
11372 r_symndx = ELF64_R_SYM (rel->r_info);
11373
11374 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11375 symbol of the previous ADDR64 reloc. The symbol gives us the
11376 proper TOC base to use. */
11377 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11378 && rel != relocs
11379 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11380 && is_opd)
11381 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11382
11383 sym = NULL;
11384 sec = NULL;
11385 h_elf = NULL;
11386 sym_name = NULL;
11387 unresolved_reloc = FALSE;
11388 warned = FALSE;
11389 orig_addend = rel->r_addend;
11390
11391 if (r_symndx < symtab_hdr->sh_info)
11392 {
11393 /* It's a local symbol. */
11394 struct _opd_sec_data *opd;
11395
11396 sym = local_syms + r_symndx;
11397 sec = local_sections[r_symndx];
11398 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11399 sym_type = ELF64_ST_TYPE (sym->st_info);
11400 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11401 opd = get_opd_info (sec);
11402 if (opd != NULL && opd->adjust != NULL)
11403 {
11404 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11405 if (adjust == -1)
11406 relocation = 0;
11407 else
11408 {
11409 /* If this is a relocation against the opd section sym
11410 and we have edited .opd, adjust the reloc addend so
11411 that ld -r and ld --emit-relocs output is correct.
11412 If it is a reloc against some other .opd symbol,
11413 then the symbol value will be adjusted later. */
11414 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11415 rel->r_addend += adjust;
11416 else
11417 relocation += adjust;
11418 }
11419 }
11420 }
11421 else
11422 {
11423 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11424 r_symndx, symtab_hdr, sym_hashes,
11425 h_elf, sec, relocation,
11426 unresolved_reloc, warned);
11427 sym_name = h_elf->root.root.string;
11428 sym_type = h_elf->type;
11429 }
11430 h = (struct ppc_link_hash_entry *) h_elf;
11431
11432 if (sec != NULL && elf_discarded_section (sec))
11433 {
11434 /* For relocs against symbols from removed linkonce sections,
11435 or sections discarded by a linker script, we just want the
11436 section contents zeroed. Avoid any special processing. */
11437 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
11438 contents + rel->r_offset);
11439 rel->r_info = 0;
11440 rel->r_addend = 0;
11441 continue;
11442 }
11443
11444 if (info->relocatable)
11445 continue;
11446
11447 /* TLS optimizations. Replace instruction sequences and relocs
11448 based on information we collected in tls_optimize. We edit
11449 RELOCS so that --emit-relocs will output something sensible
11450 for the final instruction stream. */
11451 tls_mask = 0;
11452 tls_gd = 0;
11453 toc_symndx = 0;
11454 if (h != NULL)
11455 tls_mask = h->tls_mask;
11456 else if (local_got_ents != NULL)
11457 {
11458 struct plt_entry **local_plt = (struct plt_entry **)
11459 (local_got_ents + symtab_hdr->sh_info);
11460 unsigned char *lgot_masks = (unsigned char *)
11461 (local_plt + symtab_hdr->sh_info);
11462 tls_mask = lgot_masks[r_symndx];
11463 }
11464 if (tls_mask == 0
11465 && (r_type == R_PPC64_TLS
11466 || r_type == R_PPC64_TLSGD
11467 || r_type == R_PPC64_TLSLD))
11468 {
11469 /* Check for toc tls entries. */
11470 unsigned char *toc_tls;
11471
11472 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11473 &local_syms, rel, input_bfd))
11474 return FALSE;
11475
11476 if (toc_tls)
11477 tls_mask = *toc_tls;
11478 }
11479
11480 /* Check that tls relocs are used with tls syms, and non-tls
11481 relocs are used with non-tls syms. */
11482 if (r_symndx != 0
11483 && r_type != R_PPC64_NONE
11484 && (h == NULL
11485 || h->elf.root.type == bfd_link_hash_defined
11486 || h->elf.root.type == bfd_link_hash_defweak)
11487 && (IS_PPC64_TLS_RELOC (r_type)
11488 != (sym_type == STT_TLS
11489 || (sym_type == STT_SECTION
11490 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11491 {
11492 if (tls_mask != 0
11493 && (r_type == R_PPC64_TLS
11494 || r_type == R_PPC64_TLSGD
11495 || r_type == R_PPC64_TLSLD))
11496 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11497 ;
11498 else
11499 (*_bfd_error_handler)
11500 (!IS_PPC64_TLS_RELOC (r_type)
11501 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11502 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11503 input_bfd,
11504 input_section,
11505 (long) rel->r_offset,
11506 ppc64_elf_howto_table[r_type]->name,
11507 sym_name);
11508 }
11509
11510 /* Ensure reloc mapping code below stays sane. */
11511 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11512 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11513 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11514 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11515 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11516 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11517 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11518 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11519 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11520 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11521 abort ();
11522
11523 switch (r_type)
11524 {
11525 default:
11526 break;
11527
11528 case R_PPC64_TOC16:
11529 case R_PPC64_TOC16_LO:
11530 case R_PPC64_TOC16_DS:
11531 case R_PPC64_TOC16_LO_DS:
11532 {
11533 /* Check for toc tls entries. */
11534 unsigned char *toc_tls;
11535 int retval;
11536
11537 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11538 &local_syms, rel, input_bfd);
11539 if (retval == 0)
11540 return FALSE;
11541
11542 if (toc_tls)
11543 {
11544 tls_mask = *toc_tls;
11545 if (r_type == R_PPC64_TOC16_DS
11546 || r_type == R_PPC64_TOC16_LO_DS)
11547 {
11548 if (tls_mask != 0
11549 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11550 goto toctprel;
11551 }
11552 else
11553 {
11554 /* If we found a GD reloc pair, then we might be
11555 doing a GD->IE transition. */
11556 if (retval == 2)
11557 {
11558 tls_gd = TLS_TPRELGD;
11559 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11560 goto tls_ldgd_opt;
11561 }
11562 else if (retval == 3)
11563 {
11564 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11565 goto tls_ldgd_opt;
11566 }
11567 }
11568 }
11569 }
11570 break;
11571
11572 case R_PPC64_GOT_TPREL16_DS:
11573 case R_PPC64_GOT_TPREL16_LO_DS:
11574 if (tls_mask != 0
11575 && (tls_mask & TLS_TPREL) == 0)
11576 {
11577 toctprel:
11578 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11579 insn &= 31 << 21;
11580 insn |= 0x3c0d0000; /* addis 0,13,0 */
11581 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11582 r_type = R_PPC64_TPREL16_HA;
11583 if (toc_symndx != 0)
11584 {
11585 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11586 rel->r_addend = toc_addend;
11587 /* We changed the symbol. Start over in order to
11588 get h, sym, sec etc. right. */
11589 rel--;
11590 continue;
11591 }
11592 else
11593 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11594 }
11595 break;
11596
11597 case R_PPC64_TLS:
11598 if (tls_mask != 0
11599 && (tls_mask & TLS_TPREL) == 0)
11600 {
11601 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11602 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11603 if (insn == 0)
11604 abort ();
11605 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11606 /* Was PPC64_TLS which sits on insn boundary, now
11607 PPC64_TPREL16_LO which is at low-order half-word. */
11608 rel->r_offset += d_offset;
11609 r_type = R_PPC64_TPREL16_LO;
11610 if (toc_symndx != 0)
11611 {
11612 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11613 rel->r_addend = toc_addend;
11614 /* We changed the symbol. Start over in order to
11615 get h, sym, sec etc. right. */
11616 rel--;
11617 continue;
11618 }
11619 else
11620 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11621 }
11622 break;
11623
11624 case R_PPC64_GOT_TLSGD16_HI:
11625 case R_PPC64_GOT_TLSGD16_HA:
11626 tls_gd = TLS_TPRELGD;
11627 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11628 goto tls_gdld_hi;
11629 break;
11630
11631 case R_PPC64_GOT_TLSLD16_HI:
11632 case R_PPC64_GOT_TLSLD16_HA:
11633 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11634 {
11635 tls_gdld_hi:
11636 if ((tls_mask & tls_gd) != 0)
11637 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11638 + R_PPC64_GOT_TPREL16_DS);
11639 else
11640 {
11641 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11642 rel->r_offset -= d_offset;
11643 r_type = R_PPC64_NONE;
11644 }
11645 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11646 }
11647 break;
11648
11649 case R_PPC64_GOT_TLSGD16:
11650 case R_PPC64_GOT_TLSGD16_LO:
11651 tls_gd = TLS_TPRELGD;
11652 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11653 goto tls_ldgd_opt;
11654 break;
11655
11656 case R_PPC64_GOT_TLSLD16:
11657 case R_PPC64_GOT_TLSLD16_LO:
11658 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11659 {
11660 unsigned int insn1, insn2, insn3;
11661 bfd_vma offset;
11662
11663 tls_ldgd_opt:
11664 offset = (bfd_vma) -1;
11665 /* If not using the newer R_PPC64_TLSGD/LD to mark
11666 __tls_get_addr calls, we must trust that the call
11667 stays with its arg setup insns, ie. that the next
11668 reloc is the __tls_get_addr call associated with
11669 the current reloc. Edit both insns. */
11670 if (input_section->has_tls_get_addr_call
11671 && rel + 1 < relend
11672 && branch_reloc_hash_match (input_bfd, rel + 1,
11673 htab->tls_get_addr,
11674 htab->tls_get_addr_fd))
11675 offset = rel[1].r_offset;
11676 if ((tls_mask & tls_gd) != 0)
11677 {
11678 /* IE */
11679 insn1 = bfd_get_32 (output_bfd,
11680 contents + rel->r_offset - d_offset);
11681 insn1 &= (1 << 26) - (1 << 2);
11682 insn1 |= 58 << 26; /* ld */
11683 insn2 = 0x7c636a14; /* add 3,3,13 */
11684 if (offset != (bfd_vma) -1)
11685 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11686 if ((tls_mask & TLS_EXPLICIT) == 0)
11687 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11688 + R_PPC64_GOT_TPREL16_DS);
11689 else
11690 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11691 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11692 }
11693 else
11694 {
11695 /* LE */
11696 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11697 insn2 = 0x38630000; /* addi 3,3,0 */
11698 if (tls_gd == 0)
11699 {
11700 /* Was an LD reloc. */
11701 if (toc_symndx)
11702 sec = local_sections[toc_symndx];
11703 for (r_symndx = 0;
11704 r_symndx < symtab_hdr->sh_info;
11705 r_symndx++)
11706 if (local_sections[r_symndx] == sec)
11707 break;
11708 if (r_symndx >= symtab_hdr->sh_info)
11709 r_symndx = 0;
11710 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11711 if (r_symndx != 0)
11712 rel->r_addend -= (local_syms[r_symndx].st_value
11713 + sec->output_offset
11714 + sec->output_section->vma);
11715 }
11716 else if (toc_symndx != 0)
11717 {
11718 r_symndx = toc_symndx;
11719 rel->r_addend = toc_addend;
11720 }
11721 r_type = R_PPC64_TPREL16_HA;
11722 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11723 if (offset != (bfd_vma) -1)
11724 {
11725 rel[1].r_info = ELF64_R_INFO (r_symndx,
11726 R_PPC64_TPREL16_LO);
11727 rel[1].r_offset = offset + d_offset;
11728 rel[1].r_addend = rel->r_addend;
11729 }
11730 }
11731 bfd_put_32 (output_bfd, insn1,
11732 contents + rel->r_offset - d_offset);
11733 if (offset != (bfd_vma) -1)
11734 {
11735 insn3 = bfd_get_32 (output_bfd,
11736 contents + offset + 4);
11737 if (insn3 == NOP
11738 || insn3 == CROR_151515 || insn3 == CROR_313131)
11739 {
11740 rel[1].r_offset += 4;
11741 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11742 insn2 = NOP;
11743 }
11744 bfd_put_32 (output_bfd, insn2, contents + offset);
11745 }
11746 if ((tls_mask & tls_gd) == 0
11747 && (tls_gd == 0 || toc_symndx != 0))
11748 {
11749 /* We changed the symbol. Start over in order
11750 to get h, sym, sec etc. right. */
11751 rel--;
11752 continue;
11753 }
11754 }
11755 break;
11756
11757 case R_PPC64_TLSGD:
11758 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11759 {
11760 unsigned int insn2, insn3;
11761 bfd_vma offset = rel->r_offset;
11762
11763 if ((tls_mask & TLS_TPRELGD) != 0)
11764 {
11765 /* IE */
11766 r_type = R_PPC64_NONE;
11767 insn2 = 0x7c636a14; /* add 3,3,13 */
11768 }
11769 else
11770 {
11771 /* LE */
11772 if (toc_symndx != 0)
11773 {
11774 r_symndx = toc_symndx;
11775 rel->r_addend = toc_addend;
11776 }
11777 r_type = R_PPC64_TPREL16_LO;
11778 rel->r_offset = offset + d_offset;
11779 insn2 = 0x38630000; /* addi 3,3,0 */
11780 }
11781 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11782 /* Zap the reloc on the _tls_get_addr call too. */
11783 BFD_ASSERT (offset == rel[1].r_offset);
11784 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11785 insn3 = bfd_get_32 (output_bfd,
11786 contents + offset + 4);
11787 if (insn3 == NOP
11788 || insn3 == CROR_151515 || insn3 == CROR_313131)
11789 {
11790 rel->r_offset += 4;
11791 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11792 insn2 = NOP;
11793 }
11794 bfd_put_32 (output_bfd, insn2, contents + offset);
11795 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11796 {
11797 rel--;
11798 continue;
11799 }
11800 }
11801 break;
11802
11803 case R_PPC64_TLSLD:
11804 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11805 {
11806 unsigned int insn2, insn3;
11807 bfd_vma offset = rel->r_offset;
11808
11809 if (toc_symndx)
11810 sec = local_sections[toc_symndx];
11811 for (r_symndx = 0;
11812 r_symndx < symtab_hdr->sh_info;
11813 r_symndx++)
11814 if (local_sections[r_symndx] == sec)
11815 break;
11816 if (r_symndx >= symtab_hdr->sh_info)
11817 r_symndx = 0;
11818 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11819 if (r_symndx != 0)
11820 rel->r_addend -= (local_syms[r_symndx].st_value
11821 + sec->output_offset
11822 + sec->output_section->vma);
11823
11824 r_type = R_PPC64_TPREL16_LO;
11825 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11826 rel->r_offset = offset + d_offset;
11827 /* Zap the reloc on the _tls_get_addr call too. */
11828 BFD_ASSERT (offset == rel[1].r_offset);
11829 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11830 insn2 = 0x38630000; /* addi 3,3,0 */
11831 insn3 = bfd_get_32 (output_bfd,
11832 contents + offset + 4);
11833 if (insn3 == NOP
11834 || insn3 == CROR_151515 || insn3 == CROR_313131)
11835 {
11836 rel->r_offset += 4;
11837 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11838 insn2 = NOP;
11839 }
11840 bfd_put_32 (output_bfd, insn2, contents + offset);
11841 rel--;
11842 continue;
11843 }
11844 break;
11845
11846 case R_PPC64_DTPMOD64:
11847 if (rel + 1 < relend
11848 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11849 && rel[1].r_offset == rel->r_offset + 8)
11850 {
11851 if ((tls_mask & TLS_GD) == 0)
11852 {
11853 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11854 if ((tls_mask & TLS_TPRELGD) != 0)
11855 r_type = R_PPC64_TPREL64;
11856 else
11857 {
11858 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11859 r_type = R_PPC64_NONE;
11860 }
11861 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11862 }
11863 }
11864 else
11865 {
11866 if ((tls_mask & TLS_LD) == 0)
11867 {
11868 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11869 r_type = R_PPC64_NONE;
11870 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11871 }
11872 }
11873 break;
11874
11875 case R_PPC64_TPREL64:
11876 if ((tls_mask & TLS_TPREL) == 0)
11877 {
11878 r_type = R_PPC64_NONE;
11879 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11880 }
11881 break;
11882 }
11883
11884 /* Handle other relocations that tweak non-addend part of insn. */
11885 insn = 0;
11886 max_br_offset = 1 << 25;
11887 addend = rel->r_addend;
11888 switch (r_type)
11889 {
11890 default:
11891 break;
11892
11893 /* Branch taken prediction relocations. */
11894 case R_PPC64_ADDR14_BRTAKEN:
11895 case R_PPC64_REL14_BRTAKEN:
11896 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11897 /* Fall thru. */
11898
11899 /* Branch not taken prediction relocations. */
11900 case R_PPC64_ADDR14_BRNTAKEN:
11901 case R_PPC64_REL14_BRNTAKEN:
11902 insn |= bfd_get_32 (output_bfd,
11903 contents + rel->r_offset) & ~(0x01 << 21);
11904 /* Fall thru. */
11905
11906 case R_PPC64_REL14:
11907 max_br_offset = 1 << 15;
11908 /* Fall thru. */
11909
11910 case R_PPC64_REL24:
11911 /* Calls to functions with a different TOC, such as calls to
11912 shared objects, need to alter the TOC pointer. This is
11913 done using a linkage stub. A REL24 branching to these
11914 linkage stubs needs to be followed by a nop, as the nop
11915 will be replaced with an instruction to restore the TOC
11916 base pointer. */
11917 stub_entry = NULL;
11918 fdh = h;
11919 if (h != NULL
11920 && h->oh != NULL
11921 && h->oh->is_func_descriptor)
11922 fdh = ppc_follow_link (h->oh);
11923 if (((fdh != NULL
11924 && fdh->elf.plt.plist != NULL)
11925 || (sec != NULL
11926 && sec->output_section != NULL
11927 && sec->id <= htab->top_id
11928 && (htab->stub_group[sec->id].toc_off
11929 != htab->stub_group[input_section->id].toc_off))
11930 || (h == NULL
11931 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11932 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11933 rel, htab)) != NULL
11934 && (stub_entry->stub_type == ppc_stub_plt_call
11935 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11936 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11937 {
11938 bfd_boolean can_plt_call = FALSE;
11939
11940 if (rel->r_offset + 8 <= input_section->size)
11941 {
11942 unsigned long nop;
11943 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11944 if (nop == NOP
11945 || nop == CROR_151515 || nop == CROR_313131)
11946 {
11947 if (h != NULL
11948 && (h == htab->tls_get_addr_fd
11949 || h == htab->tls_get_addr)
11950 && !htab->no_tls_get_addr_opt)
11951 {
11952 /* Special stub used, leave nop alone. */
11953 }
11954 else
11955 bfd_put_32 (input_bfd, LD_R2_40R1,
11956 contents + rel->r_offset + 4);
11957 can_plt_call = TRUE;
11958 }
11959 }
11960
11961 if (!can_plt_call)
11962 {
11963 if (stub_entry->stub_type == ppc_stub_plt_call)
11964 {
11965 /* If this is a plain branch rather than a branch
11966 and link, don't require a nop. However, don't
11967 allow tail calls in a shared library as they
11968 will result in r2 being corrupted. */
11969 unsigned long br;
11970 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11971 if (info->executable && (br & 1) == 0)
11972 can_plt_call = TRUE;
11973 else
11974 stub_entry = NULL;
11975 }
11976 else if (h != NULL
11977 && strcmp (h->elf.root.root.string,
11978 ".__libc_start_main") == 0)
11979 {
11980 /* Allow crt1 branch to go via a toc adjusting stub. */
11981 can_plt_call = TRUE;
11982 }
11983 else
11984 {
11985 if (strcmp (input_section->output_section->name,
11986 ".init") == 0
11987 || strcmp (input_section->output_section->name,
11988 ".fini") == 0)
11989 (*_bfd_error_handler)
11990 (_("%B(%A+0x%lx): automatic multiple TOCs "
11991 "not supported using your crt files; "
11992 "recompile with -mminimal-toc or upgrade gcc"),
11993 input_bfd,
11994 input_section,
11995 (long) rel->r_offset);
11996 else
11997 (*_bfd_error_handler)
11998 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11999 "does not allow automatic multiple TOCs; "
12000 "recompile with -mminimal-toc or "
12001 "-fno-optimize-sibling-calls, "
12002 "or make `%s' extern"),
12003 input_bfd,
12004 input_section,
12005 (long) rel->r_offset,
12006 sym_name,
12007 sym_name);
12008 bfd_set_error (bfd_error_bad_value);
12009 ret = FALSE;
12010 }
12011 }
12012
12013 if (can_plt_call
12014 && stub_entry->stub_type == ppc_stub_plt_call)
12015 unresolved_reloc = FALSE;
12016 }
12017
12018 if (stub_entry == NULL
12019 && get_opd_info (sec) != NULL)
12020 {
12021 /* The branch destination is the value of the opd entry. */
12022 bfd_vma off = (relocation + addend
12023 - sec->output_section->vma
12024 - sec->output_offset);
12025 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12026 if (dest != (bfd_vma) -1)
12027 {
12028 relocation = dest;
12029 addend = 0;
12030 }
12031 }
12032
12033 /* If the branch is out of reach we ought to have a long
12034 branch stub. */
12035 from = (rel->r_offset
12036 + input_section->output_offset
12037 + input_section->output_section->vma);
12038
12039 if (stub_entry == NULL
12040 && (relocation + addend - from + max_br_offset
12041 >= 2 * max_br_offset)
12042 && r_type != R_PPC64_ADDR14_BRTAKEN
12043 && r_type != R_PPC64_ADDR14_BRNTAKEN)
12044 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel,
12045 htab);
12046
12047 if (stub_entry != NULL)
12048 {
12049 /* Munge up the value and addend so that we call the stub
12050 rather than the procedure directly. */
12051 relocation = (stub_entry->stub_offset
12052 + stub_entry->stub_sec->output_offset
12053 + stub_entry->stub_sec->output_section->vma);
12054 addend = 0;
12055 }
12056
12057 if (insn != 0)
12058 {
12059 if (is_power4)
12060 {
12061 /* Set 'a' bit. This is 0b00010 in BO field for branch
12062 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12063 for branch on CTR insns (BO == 1a00t or 1a01t). */
12064 if ((insn & (0x14 << 21)) == (0x04 << 21))
12065 insn |= 0x02 << 21;
12066 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12067 insn |= 0x08 << 21;
12068 else
12069 break;
12070 }
12071 else
12072 {
12073 /* Invert 'y' bit if not the default. */
12074 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12075 insn ^= 0x01 << 21;
12076 }
12077
12078 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12079 }
12080
12081 /* NOP out calls to undefined weak functions.
12082 We can thus call a weak function without first
12083 checking whether the function is defined. */
12084 else if (h != NULL
12085 && h->elf.root.type == bfd_link_hash_undefweak
12086 && h->elf.dynindx == -1
12087 && r_type == R_PPC64_REL24
12088 && relocation == 0
12089 && addend == 0)
12090 {
12091 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12092 continue;
12093 }
12094 break;
12095 }
12096
12097 /* Set `addend'. */
12098 tls_type = 0;
12099 switch (r_type)
12100 {
12101 default:
12102 (*_bfd_error_handler)
12103 (_("%B: unknown relocation type %d for symbol %s"),
12104 input_bfd, (int) r_type, sym_name);
12105
12106 bfd_set_error (bfd_error_bad_value);
12107 ret = FALSE;
12108 continue;
12109
12110 case R_PPC64_NONE:
12111 case R_PPC64_TLS:
12112 case R_PPC64_TLSGD:
12113 case R_PPC64_TLSLD:
12114 case R_PPC64_GNU_VTINHERIT:
12115 case R_PPC64_GNU_VTENTRY:
12116 continue;
12117
12118 /* GOT16 relocations. Like an ADDR16 using the symbol's
12119 address in the GOT as relocation value instead of the
12120 symbol's value itself. Also, create a GOT entry for the
12121 symbol and put the symbol value there. */
12122 case R_PPC64_GOT_TLSGD16:
12123 case R_PPC64_GOT_TLSGD16_LO:
12124 case R_PPC64_GOT_TLSGD16_HI:
12125 case R_PPC64_GOT_TLSGD16_HA:
12126 tls_type = TLS_TLS | TLS_GD;
12127 goto dogot;
12128
12129 case R_PPC64_GOT_TLSLD16:
12130 case R_PPC64_GOT_TLSLD16_LO:
12131 case R_PPC64_GOT_TLSLD16_HI:
12132 case R_PPC64_GOT_TLSLD16_HA:
12133 tls_type = TLS_TLS | TLS_LD;
12134 goto dogot;
12135
12136 case R_PPC64_GOT_TPREL16_DS:
12137 case R_PPC64_GOT_TPREL16_LO_DS:
12138 case R_PPC64_GOT_TPREL16_HI:
12139 case R_PPC64_GOT_TPREL16_HA:
12140 tls_type = TLS_TLS | TLS_TPREL;
12141 goto dogot;
12142
12143 case R_PPC64_GOT_DTPREL16_DS:
12144 case R_PPC64_GOT_DTPREL16_LO_DS:
12145 case R_PPC64_GOT_DTPREL16_HI:
12146 case R_PPC64_GOT_DTPREL16_HA:
12147 tls_type = TLS_TLS | TLS_DTPREL;
12148 goto dogot;
12149
12150 case R_PPC64_GOT16:
12151 case R_PPC64_GOT16_LO:
12152 case R_PPC64_GOT16_HI:
12153 case R_PPC64_GOT16_HA:
12154 case R_PPC64_GOT16_DS:
12155 case R_PPC64_GOT16_LO_DS:
12156 dogot:
12157 {
12158 /* Relocation is to the entry for this symbol in the global
12159 offset table. */
12160 asection *got;
12161 bfd_vma *offp;
12162 bfd_vma off;
12163 unsigned long indx = 0;
12164 struct got_entry *ent;
12165
12166 if (tls_type == (TLS_TLS | TLS_LD)
12167 && (h == NULL
12168 || !h->elf.def_dynamic))
12169 ent = ppc64_tlsld_got (input_bfd);
12170 else
12171 {
12172
12173 if (h != NULL)
12174 {
12175 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12176 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12177 &h->elf)
12178 || (info->shared
12179 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
12180 /* This is actually a static link, or it is a
12181 -Bsymbolic link and the symbol is defined
12182 locally, or the symbol was forced to be local
12183 because of a version file. */
12184 ;
12185 else
12186 {
12187 indx = h->elf.dynindx;
12188 unresolved_reloc = FALSE;
12189 }
12190 ent = h->elf.got.glist;
12191 }
12192 else
12193 {
12194 if (local_got_ents == NULL)
12195 abort ();
12196 ent = local_got_ents[r_symndx];
12197 }
12198
12199 for (; ent != NULL; ent = ent->next)
12200 if (ent->addend == orig_addend
12201 && ent->owner == input_bfd
12202 && ent->tls_type == tls_type)
12203 break;
12204 }
12205
12206 if (ent == NULL)
12207 abort ();
12208 if (ent->is_indirect)
12209 ent = ent->got.ent;
12210 offp = &ent->got.offset;
12211 got = ppc64_elf_tdata (ent->owner)->got;
12212 if (got == NULL)
12213 abort ();
12214
12215 /* The offset must always be a multiple of 8. We use the
12216 least significant bit to record whether we have already
12217 processed this entry. */
12218 off = *offp;
12219 if ((off & 1) != 0)
12220 off &= ~1;
12221 else
12222 {
12223 /* Generate relocs for the dynamic linker, except in
12224 the case of TLSLD where we'll use one entry per
12225 module. */
12226 asection *relgot;
12227 bfd_boolean ifunc;
12228
12229 *offp = off | 1;
12230 relgot = NULL;
12231 ifunc = (h != NULL
12232 ? h->elf.type == STT_GNU_IFUNC
12233 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12234 if ((info->shared || indx != 0)
12235 && (h == NULL
12236 || (tls_type == (TLS_TLS | TLS_LD)
12237 && !h->elf.def_dynamic)
12238 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12239 || h->elf.root.type != bfd_link_hash_undefweak))
12240 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12241 else if (ifunc)
12242 relgot = htab->reliplt;
12243 if (relgot != NULL)
12244 {
12245 outrel.r_offset = (got->output_section->vma
12246 + got->output_offset
12247 + off);
12248 outrel.r_addend = addend;
12249 if (tls_type & (TLS_LD | TLS_GD))
12250 {
12251 outrel.r_addend = 0;
12252 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12253 if (tls_type == (TLS_TLS | TLS_GD))
12254 {
12255 loc = relgot->contents;
12256 loc += (relgot->reloc_count++
12257 * sizeof (Elf64_External_Rela));
12258 bfd_elf64_swap_reloca_out (output_bfd,
12259 &outrel, loc);
12260 outrel.r_offset += 8;
12261 outrel.r_addend = addend;
12262 outrel.r_info
12263 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12264 }
12265 }
12266 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12267 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12268 else if (tls_type == (TLS_TLS | TLS_TPREL))
12269 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12270 else if (indx != 0)
12271 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12272 else
12273 {
12274 if (ifunc)
12275 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12276 else
12277 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12278
12279 /* Write the .got section contents for the sake
12280 of prelink. */
12281 loc = got->contents + off;
12282 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12283 loc);
12284 }
12285
12286 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12287 {
12288 outrel.r_addend += relocation;
12289 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12290 outrel.r_addend -= htab->elf.tls_sec->vma;
12291 }
12292 loc = relgot->contents;
12293 loc += (relgot->reloc_count++
12294 * sizeof (Elf64_External_Rela));
12295 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12296 }
12297
12298 /* Init the .got section contents here if we're not
12299 emitting a reloc. */
12300 else
12301 {
12302 relocation += addend;
12303 if (tls_type == (TLS_TLS | TLS_LD))
12304 relocation = 1;
12305 else if (tls_type != 0)
12306 {
12307 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12308 if (tls_type == (TLS_TLS | TLS_TPREL))
12309 relocation += DTP_OFFSET - TP_OFFSET;
12310
12311 if (tls_type == (TLS_TLS | TLS_GD))
12312 {
12313 bfd_put_64 (output_bfd, relocation,
12314 got->contents + off + 8);
12315 relocation = 1;
12316 }
12317 }
12318
12319 bfd_put_64 (output_bfd, relocation,
12320 got->contents + off);
12321 }
12322 }
12323
12324 if (off >= (bfd_vma) -2)
12325 abort ();
12326
12327 relocation = got->output_section->vma + got->output_offset + off;
12328 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12329 }
12330 break;
12331
12332 case R_PPC64_PLT16_HA:
12333 case R_PPC64_PLT16_HI:
12334 case R_PPC64_PLT16_LO:
12335 case R_PPC64_PLT32:
12336 case R_PPC64_PLT64:
12337 /* Relocation is to the entry for this symbol in the
12338 procedure linkage table. */
12339
12340 /* Resolve a PLT reloc against a local symbol directly,
12341 without using the procedure linkage table. */
12342 if (h == NULL)
12343 break;
12344
12345 /* It's possible that we didn't make a PLT entry for this
12346 symbol. This happens when statically linking PIC code,
12347 or when using -Bsymbolic. Go find a match if there is a
12348 PLT entry. */
12349 if (htab->plt != NULL)
12350 {
12351 struct plt_entry *ent;
12352 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12353 if (ent->addend == orig_addend
12354 && ent->plt.offset != (bfd_vma) -1)
12355 {
12356 relocation = (htab->plt->output_section->vma
12357 + htab->plt->output_offset
12358 + ent->plt.offset);
12359 unresolved_reloc = FALSE;
12360 }
12361 }
12362 break;
12363
12364 case R_PPC64_TOC:
12365 /* Relocation value is TOC base. */
12366 relocation = TOCstart;
12367 if (r_symndx == 0)
12368 relocation += htab->stub_group[input_section->id].toc_off;
12369 else if (unresolved_reloc)
12370 ;
12371 else if (sec != NULL && sec->id <= htab->top_id)
12372 relocation += htab->stub_group[sec->id].toc_off;
12373 else
12374 unresolved_reloc = TRUE;
12375 goto dodyn;
12376
12377 /* TOC16 relocs. We want the offset relative to the TOC base,
12378 which is the address of the start of the TOC plus 0x8000.
12379 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12380 in this order. */
12381 case R_PPC64_TOC16:
12382 case R_PPC64_TOC16_LO:
12383 case R_PPC64_TOC16_HI:
12384 case R_PPC64_TOC16_DS:
12385 case R_PPC64_TOC16_LO_DS:
12386 case R_PPC64_TOC16_HA:
12387 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12388 break;
12389
12390 /* Relocate against the beginning of the section. */
12391 case R_PPC64_SECTOFF:
12392 case R_PPC64_SECTOFF_LO:
12393 case R_PPC64_SECTOFF_HI:
12394 case R_PPC64_SECTOFF_DS:
12395 case R_PPC64_SECTOFF_LO_DS:
12396 case R_PPC64_SECTOFF_HA:
12397 if (sec != NULL)
12398 addend -= sec->output_section->vma;
12399 break;
12400
12401 case R_PPC64_REL16:
12402 case R_PPC64_REL16_LO:
12403 case R_PPC64_REL16_HI:
12404 case R_PPC64_REL16_HA:
12405 break;
12406
12407 case R_PPC64_REL14:
12408 case R_PPC64_REL14_BRNTAKEN:
12409 case R_PPC64_REL14_BRTAKEN:
12410 case R_PPC64_REL24:
12411 break;
12412
12413 case R_PPC64_TPREL16:
12414 case R_PPC64_TPREL16_LO:
12415 case R_PPC64_TPREL16_HI:
12416 case R_PPC64_TPREL16_HA:
12417 case R_PPC64_TPREL16_DS:
12418 case R_PPC64_TPREL16_LO_DS:
12419 case R_PPC64_TPREL16_HIGHER:
12420 case R_PPC64_TPREL16_HIGHERA:
12421 case R_PPC64_TPREL16_HIGHEST:
12422 case R_PPC64_TPREL16_HIGHESTA:
12423 if (h != NULL
12424 && h->elf.root.type == bfd_link_hash_undefweak
12425 && h->elf.dynindx == -1)
12426 {
12427 /* Make this relocation against an undefined weak symbol
12428 resolve to zero. This is really just a tweak, since
12429 code using weak externs ought to check that they are
12430 defined before using them. */
12431 bfd_byte *p = contents + rel->r_offset - d_offset;
12432
12433 insn = bfd_get_32 (output_bfd, p);
12434 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12435 if (insn != 0)
12436 bfd_put_32 (output_bfd, insn, p);
12437 break;
12438 }
12439 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12440 if (info->shared)
12441 /* The TPREL16 relocs shouldn't really be used in shared
12442 libs as they will result in DT_TEXTREL being set, but
12443 support them anyway. */
12444 goto dodyn;
12445 break;
12446
12447 case R_PPC64_DTPREL16:
12448 case R_PPC64_DTPREL16_LO:
12449 case R_PPC64_DTPREL16_HI:
12450 case R_PPC64_DTPREL16_HA:
12451 case R_PPC64_DTPREL16_DS:
12452 case R_PPC64_DTPREL16_LO_DS:
12453 case R_PPC64_DTPREL16_HIGHER:
12454 case R_PPC64_DTPREL16_HIGHERA:
12455 case R_PPC64_DTPREL16_HIGHEST:
12456 case R_PPC64_DTPREL16_HIGHESTA:
12457 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12458 break;
12459
12460 case R_PPC64_DTPMOD64:
12461 relocation = 1;
12462 addend = 0;
12463 goto dodyn;
12464
12465 case R_PPC64_TPREL64:
12466 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12467 goto dodyn;
12468
12469 case R_PPC64_DTPREL64:
12470 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12471 /* Fall thru */
12472
12473 /* Relocations that may need to be propagated if this is a
12474 dynamic object. */
12475 case R_PPC64_REL30:
12476 case R_PPC64_REL32:
12477 case R_PPC64_REL64:
12478 case R_PPC64_ADDR14:
12479 case R_PPC64_ADDR14_BRNTAKEN:
12480 case R_PPC64_ADDR14_BRTAKEN:
12481 case R_PPC64_ADDR16:
12482 case R_PPC64_ADDR16_DS:
12483 case R_PPC64_ADDR16_HA:
12484 case R_PPC64_ADDR16_HI:
12485 case R_PPC64_ADDR16_HIGHER:
12486 case R_PPC64_ADDR16_HIGHERA:
12487 case R_PPC64_ADDR16_HIGHEST:
12488 case R_PPC64_ADDR16_HIGHESTA:
12489 case R_PPC64_ADDR16_LO:
12490 case R_PPC64_ADDR16_LO_DS:
12491 case R_PPC64_ADDR24:
12492 case R_PPC64_ADDR32:
12493 case R_PPC64_ADDR64:
12494 case R_PPC64_UADDR16:
12495 case R_PPC64_UADDR32:
12496 case R_PPC64_UADDR64:
12497 dodyn:
12498 if ((input_section->flags & SEC_ALLOC) == 0)
12499 break;
12500
12501 if (NO_OPD_RELOCS && is_opd)
12502 break;
12503
12504 if ((info->shared
12505 && (h == NULL
12506 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12507 || h->elf.root.type != bfd_link_hash_undefweak)
12508 && (must_be_dyn_reloc (info, r_type)
12509 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12510 || (ELIMINATE_COPY_RELOCS
12511 && !info->shared
12512 && h != NULL
12513 && h->elf.dynindx != -1
12514 && !h->elf.non_got_ref
12515 && !h->elf.def_regular)
12516 || (!info->shared
12517 && (h != NULL
12518 ? h->elf.type == STT_GNU_IFUNC
12519 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12520 {
12521 bfd_boolean skip, relocate;
12522 asection *sreloc;
12523 bfd_vma out_off;
12524
12525 /* When generating a dynamic object, these relocations
12526 are copied into the output file to be resolved at run
12527 time. */
12528
12529 skip = FALSE;
12530 relocate = FALSE;
12531
12532 out_off = _bfd_elf_section_offset (output_bfd, info,
12533 input_section, rel->r_offset);
12534 if (out_off == (bfd_vma) -1)
12535 skip = TRUE;
12536 else if (out_off == (bfd_vma) -2)
12537 skip = TRUE, relocate = TRUE;
12538 out_off += (input_section->output_section->vma
12539 + input_section->output_offset);
12540 outrel.r_offset = out_off;
12541 outrel.r_addend = rel->r_addend;
12542
12543 /* Optimize unaligned reloc use. */
12544 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12545 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12546 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12547 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12548 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12549 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12550 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12551 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12552 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12553
12554 if (skip)
12555 memset (&outrel, 0, sizeof outrel);
12556 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
12557 && !is_opd
12558 && r_type != R_PPC64_TOC)
12559 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12560 else
12561 {
12562 /* This symbol is local, or marked to become local,
12563 or this is an opd section reloc which must point
12564 at a local function. */
12565 outrel.r_addend += relocation;
12566 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12567 {
12568 if (is_opd && h != NULL)
12569 {
12570 /* Lie about opd entries. This case occurs
12571 when building shared libraries and we
12572 reference a function in another shared
12573 lib. The same thing happens for a weak
12574 definition in an application that's
12575 overridden by a strong definition in a
12576 shared lib. (I believe this is a generic
12577 bug in binutils handling of weak syms.)
12578 In these cases we won't use the opd
12579 entry in this lib. */
12580 unresolved_reloc = FALSE;
12581 }
12582 if (!is_opd
12583 && r_type == R_PPC64_ADDR64
12584 && (h != NULL
12585 ? h->elf.type == STT_GNU_IFUNC
12586 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12587 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12588 else
12589 {
12590 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12591
12592 /* We need to relocate .opd contents for ld.so.
12593 Prelink also wants simple and consistent rules
12594 for relocs. This make all RELATIVE relocs have
12595 *r_offset equal to r_addend. */
12596 relocate = TRUE;
12597 }
12598 }
12599 else
12600 {
12601 long indx = 0;
12602
12603 if (h != NULL
12604 ? h->elf.type == STT_GNU_IFUNC
12605 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12606 {
12607 (*_bfd_error_handler)
12608 (_("%B(%A+0x%lx): relocation %s for indirect "
12609 "function %s unsupported"),
12610 input_bfd,
12611 input_section,
12612 (long) rel->r_offset,
12613 ppc64_elf_howto_table[r_type]->name,
12614 sym_name);
12615 ret = FALSE;
12616 }
12617 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12618 ;
12619 else if (sec == NULL || sec->owner == NULL)
12620 {
12621 bfd_set_error (bfd_error_bad_value);
12622 return FALSE;
12623 }
12624 else
12625 {
12626 asection *osec;
12627
12628 osec = sec->output_section;
12629 indx = elf_section_data (osec)->dynindx;
12630
12631 if (indx == 0)
12632 {
12633 if ((osec->flags & SEC_READONLY) == 0
12634 && htab->elf.data_index_section != NULL)
12635 osec = htab->elf.data_index_section;
12636 else
12637 osec = htab->elf.text_index_section;
12638 indx = elf_section_data (osec)->dynindx;
12639 }
12640 BFD_ASSERT (indx != 0);
12641
12642 /* We are turning this relocation into one
12643 against a section symbol, so subtract out
12644 the output section's address but not the
12645 offset of the input section in the output
12646 section. */
12647 outrel.r_addend -= osec->vma;
12648 }
12649
12650 outrel.r_info = ELF64_R_INFO (indx, r_type);
12651 }
12652 }
12653
12654 sreloc = elf_section_data (input_section)->sreloc;
12655 if (!htab->elf.dynamic_sections_created)
12656 sreloc = htab->reliplt;
12657 if (sreloc == NULL)
12658 abort ();
12659
12660 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12661 >= sreloc->size)
12662 abort ();
12663 loc = sreloc->contents;
12664 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12665 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12666
12667 /* If this reloc is against an external symbol, it will
12668 be computed at runtime, so there's no need to do
12669 anything now. However, for the sake of prelink ensure
12670 that the section contents are a known value. */
12671 if (! relocate)
12672 {
12673 unresolved_reloc = FALSE;
12674 /* The value chosen here is quite arbitrary as ld.so
12675 ignores section contents except for the special
12676 case of .opd where the contents might be accessed
12677 before relocation. Choose zero, as that won't
12678 cause reloc overflow. */
12679 relocation = 0;
12680 addend = 0;
12681 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12682 to improve backward compatibility with older
12683 versions of ld. */
12684 if (r_type == R_PPC64_ADDR64)
12685 addend = outrel.r_addend;
12686 /* Adjust pc_relative relocs to have zero in *r_offset. */
12687 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12688 addend = (input_section->output_section->vma
12689 + input_section->output_offset
12690 + rel->r_offset);
12691 }
12692 }
12693 break;
12694
12695 case R_PPC64_COPY:
12696 case R_PPC64_GLOB_DAT:
12697 case R_PPC64_JMP_SLOT:
12698 case R_PPC64_JMP_IREL:
12699 case R_PPC64_RELATIVE:
12700 /* We shouldn't ever see these dynamic relocs in relocatable
12701 files. */
12702 /* Fall through. */
12703
12704 case R_PPC64_PLTGOT16:
12705 case R_PPC64_PLTGOT16_DS:
12706 case R_PPC64_PLTGOT16_HA:
12707 case R_PPC64_PLTGOT16_HI:
12708 case R_PPC64_PLTGOT16_LO:
12709 case R_PPC64_PLTGOT16_LO_DS:
12710 case R_PPC64_PLTREL32:
12711 case R_PPC64_PLTREL64:
12712 /* These ones haven't been implemented yet. */
12713
12714 (*_bfd_error_handler)
12715 (_("%B: relocation %s is not supported for symbol %s."),
12716 input_bfd,
12717 ppc64_elf_howto_table[r_type]->name, sym_name);
12718
12719 bfd_set_error (bfd_error_invalid_operation);
12720 ret = FALSE;
12721 continue;
12722 }
12723
12724 /* Multi-instruction sequences that access the TOC can be
12725 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12726 to nop; addi rb,r2,x; */
12727 switch (r_type)
12728 {
12729 default:
12730 break;
12731
12732 case R_PPC64_GOT_TLSLD16_HI:
12733 case R_PPC64_GOT_TLSGD16_HI:
12734 case R_PPC64_GOT_TPREL16_HI:
12735 case R_PPC64_GOT_DTPREL16_HI:
12736 case R_PPC64_GOT16_HI:
12737 case R_PPC64_TOC16_HI:
12738 /* These relocs would only be useful if building up an
12739 offset to later add to r2, perhaps in an indexed
12740 addressing mode instruction. Don't try to optimize.
12741 Unfortunately, the possibility of someone building up an
12742 offset like this or even with the HA relocs, means that
12743 we need to check the high insn when optimizing the low
12744 insn. */
12745 break;
12746
12747 case R_PPC64_GOT_TLSLD16_HA:
12748 case R_PPC64_GOT_TLSGD16_HA:
12749 case R_PPC64_GOT_TPREL16_HA:
12750 case R_PPC64_GOT_DTPREL16_HA:
12751 case R_PPC64_GOT16_HA:
12752 case R_PPC64_TOC16_HA:
12753 /* For now we don't nop out the first instruction. */
12754 break;
12755
12756 case R_PPC64_GOT_TLSLD16_LO:
12757 case R_PPC64_GOT_TLSGD16_LO:
12758 case R_PPC64_GOT_TPREL16_LO_DS:
12759 case R_PPC64_GOT_DTPREL16_LO_DS:
12760 case R_PPC64_GOT16_LO:
12761 case R_PPC64_GOT16_LO_DS:
12762 case R_PPC64_TOC16_LO:
12763 case R_PPC64_TOC16_LO_DS:
12764 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
12765 {
12766 bfd_byte *p = contents + (rel->r_offset & ~3);
12767 insn = bfd_get_32 (input_bfd, p);
12768 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
12769 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
12770 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
12771 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
12772 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
12773 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
12774 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
12775 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
12776 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
12777 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
12778 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
12779 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
12780 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
12781 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
12782 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
12783 && (insn & 3) != 1)
12784 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
12785 && ((insn & 3) == 0 || (insn & 3) == 3)))
12786 {
12787 unsigned int reg = (insn >> 16) & 0x1f;
12788 if (ha_reloc_match (relocs, rel, reg, input_bfd, contents))
12789 {
12790 insn &= ~(0x1f << 16);
12791 insn |= 2 << 16;
12792 bfd_put_32 (input_bfd, insn, p);
12793 }
12794 }
12795 }
12796 break;
12797 }
12798
12799 /* Do any further special processing. */
12800 switch (r_type)
12801 {
12802 default:
12803 break;
12804
12805 case R_PPC64_ADDR16_HA:
12806 case R_PPC64_REL16_HA:
12807 case R_PPC64_ADDR16_HIGHERA:
12808 case R_PPC64_ADDR16_HIGHESTA:
12809 case R_PPC64_TOC16_HA:
12810 case R_PPC64_SECTOFF_HA:
12811 case R_PPC64_TPREL16_HA:
12812 case R_PPC64_DTPREL16_HA:
12813 case R_PPC64_TPREL16_HIGHER:
12814 case R_PPC64_TPREL16_HIGHERA:
12815 case R_PPC64_TPREL16_HIGHEST:
12816 case R_PPC64_TPREL16_HIGHESTA:
12817 case R_PPC64_DTPREL16_HIGHER:
12818 case R_PPC64_DTPREL16_HIGHERA:
12819 case R_PPC64_DTPREL16_HIGHEST:
12820 case R_PPC64_DTPREL16_HIGHESTA:
12821 /* It's just possible that this symbol is a weak symbol
12822 that's not actually defined anywhere. In that case,
12823 'sec' would be NULL, and we should leave the symbol
12824 alone (it will be set to zero elsewhere in the link). */
12825 if (sec == NULL)
12826 break;
12827 /* Fall thru */
12828
12829 case R_PPC64_GOT16_HA:
12830 case R_PPC64_PLTGOT16_HA:
12831 case R_PPC64_PLT16_HA:
12832 case R_PPC64_GOT_TLSGD16_HA:
12833 case R_PPC64_GOT_TLSLD16_HA:
12834 case R_PPC64_GOT_TPREL16_HA:
12835 case R_PPC64_GOT_DTPREL16_HA:
12836 /* Add 0x10000 if sign bit in 0:15 is set.
12837 Bits 0:15 are not used. */
12838 addend += 0x8000;
12839 break;
12840
12841 case R_PPC64_ADDR16_DS:
12842 case R_PPC64_ADDR16_LO_DS:
12843 case R_PPC64_GOT16_DS:
12844 case R_PPC64_GOT16_LO_DS:
12845 case R_PPC64_PLT16_LO_DS:
12846 case R_PPC64_SECTOFF_DS:
12847 case R_PPC64_SECTOFF_LO_DS:
12848 case R_PPC64_TOC16_DS:
12849 case R_PPC64_TOC16_LO_DS:
12850 case R_PPC64_PLTGOT16_DS:
12851 case R_PPC64_PLTGOT16_LO_DS:
12852 case R_PPC64_GOT_TPREL16_DS:
12853 case R_PPC64_GOT_TPREL16_LO_DS:
12854 case R_PPC64_GOT_DTPREL16_DS:
12855 case R_PPC64_GOT_DTPREL16_LO_DS:
12856 case R_PPC64_TPREL16_DS:
12857 case R_PPC64_TPREL16_LO_DS:
12858 case R_PPC64_DTPREL16_DS:
12859 case R_PPC64_DTPREL16_LO_DS:
12860 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12861 mask = 3;
12862 /* If this reloc is against an lq insn, then the value must be
12863 a multiple of 16. This is somewhat of a hack, but the
12864 "correct" way to do this by defining _DQ forms of all the
12865 _DS relocs bloats all reloc switches in this file. It
12866 doesn't seem to make much sense to use any of these relocs
12867 in data, so testing the insn should be safe. */
12868 if ((insn & (0x3f << 26)) == (56u << 26))
12869 mask = 15;
12870 if (((relocation + addend) & mask) != 0)
12871 {
12872 (*_bfd_error_handler)
12873 (_("%B: error: relocation %s not a multiple of %d"),
12874 input_bfd,
12875 ppc64_elf_howto_table[r_type]->name,
12876 mask + 1);
12877 bfd_set_error (bfd_error_bad_value);
12878 ret = FALSE;
12879 continue;
12880 }
12881 break;
12882 }
12883
12884 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12885 because such sections are not SEC_ALLOC and thus ld.so will
12886 not process them. */
12887 if (unresolved_reloc
12888 && !((input_section->flags & SEC_DEBUGGING) != 0
12889 && h->elf.def_dynamic))
12890 {
12891 (*_bfd_error_handler)
12892 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12893 input_bfd,
12894 input_section,
12895 (long) rel->r_offset,
12896 ppc64_elf_howto_table[(int) r_type]->name,
12897 h->elf.root.root.string);
12898 ret = FALSE;
12899 }
12900
12901 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12902 input_bfd,
12903 input_section,
12904 contents,
12905 rel->r_offset,
12906 relocation,
12907 addend);
12908
12909 if (r != bfd_reloc_ok)
12910 {
12911 if (sym_name == NULL)
12912 sym_name = "(null)";
12913 if (r == bfd_reloc_overflow)
12914 {
12915 if (warned)
12916 continue;
12917 if (h != NULL
12918 && h->elf.root.type == bfd_link_hash_undefweak
12919 && ppc64_elf_howto_table[r_type]->pc_relative)
12920 {
12921 /* Assume this is a call protected by other code that
12922 detects the symbol is undefined. If this is the case,
12923 we can safely ignore the overflow. If not, the
12924 program is hosed anyway, and a little warning isn't
12925 going to help. */
12926
12927 continue;
12928 }
12929
12930 if (!((*info->callbacks->reloc_overflow)
12931 (info, (h ? &h->elf.root : NULL), sym_name,
12932 ppc64_elf_howto_table[r_type]->name,
12933 orig_addend, input_bfd, input_section, rel->r_offset)))
12934 return FALSE;
12935 }
12936 else
12937 {
12938 (*_bfd_error_handler)
12939 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12940 input_bfd,
12941 input_section,
12942 (long) rel->r_offset,
12943 ppc64_elf_howto_table[r_type]->name,
12944 sym_name,
12945 (int) r);
12946 ret = FALSE;
12947 }
12948 }
12949 }
12950
12951 /* If we're emitting relocations, then shortly after this function
12952 returns, reloc offsets and addends for this section will be
12953 adjusted. Worse, reloc symbol indices will be for the output
12954 file rather than the input. Save a copy of the relocs for
12955 opd_entry_value. */
12956 if (is_opd && (info->emitrelocations || info->relocatable))
12957 {
12958 bfd_size_type amt;
12959 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12960 rel = bfd_alloc (input_bfd, amt);
12961 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12962 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12963 if (rel == NULL)
12964 return FALSE;
12965 memcpy (rel, relocs, amt);
12966 }
12967 return ret;
12968 }
12969
12970 /* Adjust the value of any local symbols in opd sections. */
12971
12972 static int
12973 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12974 const char *name ATTRIBUTE_UNUSED,
12975 Elf_Internal_Sym *elfsym,
12976 asection *input_sec,
12977 struct elf_link_hash_entry *h)
12978 {
12979 struct _opd_sec_data *opd;
12980 long adjust;
12981 bfd_vma value;
12982
12983 if (h != NULL)
12984 return 1;
12985
12986 opd = get_opd_info (input_sec);
12987 if (opd == NULL || opd->adjust == NULL)
12988 return 1;
12989
12990 value = elfsym->st_value - input_sec->output_offset;
12991 if (!info->relocatable)
12992 value -= input_sec->output_section->vma;
12993
12994 adjust = opd->adjust[value / 8];
12995 if (adjust == -1)
12996 return 2;
12997
12998 elfsym->st_value += adjust;
12999 return 1;
13000 }
13001
13002 /* Finish up dynamic symbol handling. We set the contents of various
13003 dynamic sections here. */
13004
13005 static bfd_boolean
13006 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13007 struct bfd_link_info *info,
13008 struct elf_link_hash_entry *h,
13009 Elf_Internal_Sym *sym)
13010 {
13011 struct ppc_link_hash_table *htab;
13012 struct plt_entry *ent;
13013 Elf_Internal_Rela rela;
13014 bfd_byte *loc;
13015
13016 htab = ppc_hash_table (info);
13017 if (htab == NULL)
13018 return FALSE;
13019
13020 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13021 if (ent->plt.offset != (bfd_vma) -1)
13022 {
13023 /* This symbol has an entry in the procedure linkage
13024 table. Set it up. */
13025 if (!htab->elf.dynamic_sections_created
13026 || h->dynindx == -1)
13027 {
13028 BFD_ASSERT (h->type == STT_GNU_IFUNC
13029 && h->def_regular
13030 && (h->root.type == bfd_link_hash_defined
13031 || h->root.type == bfd_link_hash_defweak));
13032 rela.r_offset = (htab->iplt->output_section->vma
13033 + htab->iplt->output_offset
13034 + ent->plt.offset);
13035 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13036 rela.r_addend = (h->root.u.def.value
13037 + h->root.u.def.section->output_offset
13038 + h->root.u.def.section->output_section->vma
13039 + ent->addend);
13040 loc = (htab->reliplt->contents
13041 + (htab->reliplt->reloc_count++
13042 * sizeof (Elf64_External_Rela)));
13043 }
13044 else
13045 {
13046 rela.r_offset = (htab->plt->output_section->vma
13047 + htab->plt->output_offset
13048 + ent->plt.offset);
13049 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13050 rela.r_addend = ent->addend;
13051 loc = (htab->relplt->contents
13052 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13053 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13054 }
13055 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13056 }
13057
13058 if (h->needs_copy)
13059 {
13060 /* This symbol needs a copy reloc. Set it up. */
13061
13062 if (h->dynindx == -1
13063 || (h->root.type != bfd_link_hash_defined
13064 && h->root.type != bfd_link_hash_defweak)
13065 || htab->relbss == NULL)
13066 abort ();
13067
13068 rela.r_offset = (h->root.u.def.value
13069 + h->root.u.def.section->output_section->vma
13070 + h->root.u.def.section->output_offset);
13071 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13072 rela.r_addend = 0;
13073 loc = htab->relbss->contents;
13074 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13075 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13076 }
13077
13078 /* Mark some specially defined symbols as absolute. */
13079 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13080 sym->st_shndx = SHN_ABS;
13081
13082 return TRUE;
13083 }
13084
13085 /* Used to decide how to sort relocs in an optimal manner for the
13086 dynamic linker, before writing them out. */
13087
13088 static enum elf_reloc_type_class
13089 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13090 {
13091 enum elf_ppc64_reloc_type r_type;
13092
13093 r_type = ELF64_R_TYPE (rela->r_info);
13094 switch (r_type)
13095 {
13096 case R_PPC64_RELATIVE:
13097 return reloc_class_relative;
13098 case R_PPC64_JMP_SLOT:
13099 return reloc_class_plt;
13100 case R_PPC64_COPY:
13101 return reloc_class_copy;
13102 default:
13103 return reloc_class_normal;
13104 }
13105 }
13106
13107 /* Finish up the dynamic sections. */
13108
13109 static bfd_boolean
13110 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13111 struct bfd_link_info *info)
13112 {
13113 struct ppc_link_hash_table *htab;
13114 bfd *dynobj;
13115 asection *sdyn;
13116
13117 htab = ppc_hash_table (info);
13118 if (htab == NULL)
13119 return FALSE;
13120
13121 dynobj = htab->elf.dynobj;
13122 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13123
13124 if (htab->elf.dynamic_sections_created)
13125 {
13126 Elf64_External_Dyn *dyncon, *dynconend;
13127
13128 if (sdyn == NULL || htab->got == NULL)
13129 abort ();
13130
13131 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13132 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13133 for (; dyncon < dynconend; dyncon++)
13134 {
13135 Elf_Internal_Dyn dyn;
13136 asection *s;
13137
13138 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13139
13140 switch (dyn.d_tag)
13141 {
13142 default:
13143 continue;
13144
13145 case DT_PPC64_GLINK:
13146 s = htab->glink;
13147 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13148 /* We stupidly defined DT_PPC64_GLINK to be the start
13149 of glink rather than the first entry point, which is
13150 what ld.so needs, and now have a bigger stub to
13151 support automatic multiple TOCs. */
13152 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13153 break;
13154
13155 case DT_PPC64_OPD:
13156 s = bfd_get_section_by_name (output_bfd, ".opd");
13157 if (s == NULL)
13158 continue;
13159 dyn.d_un.d_ptr = s->vma;
13160 break;
13161
13162 case DT_PPC64_OPDSZ:
13163 s = bfd_get_section_by_name (output_bfd, ".opd");
13164 if (s == NULL)
13165 continue;
13166 dyn.d_un.d_val = s->size;
13167 break;
13168
13169 case DT_PLTGOT:
13170 s = htab->plt;
13171 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13172 break;
13173
13174 case DT_JMPREL:
13175 s = htab->relplt;
13176 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13177 break;
13178
13179 case DT_PLTRELSZ:
13180 dyn.d_un.d_val = htab->relplt->size;
13181 break;
13182
13183 case DT_RELASZ:
13184 /* Don't count procedure linkage table relocs in the
13185 overall reloc count. */
13186 s = htab->relplt;
13187 if (s == NULL)
13188 continue;
13189 dyn.d_un.d_val -= s->size;
13190 break;
13191
13192 case DT_RELA:
13193 /* We may not be using the standard ELF linker script.
13194 If .rela.plt is the first .rela section, we adjust
13195 DT_RELA to not include it. */
13196 s = htab->relplt;
13197 if (s == NULL)
13198 continue;
13199 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13200 continue;
13201 dyn.d_un.d_ptr += s->size;
13202 break;
13203 }
13204
13205 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13206 }
13207 }
13208
13209 if (htab->got != NULL && htab->got->size != 0)
13210 {
13211 /* Fill in the first entry in the global offset table.
13212 We use it to hold the link-time TOCbase. */
13213 bfd_put_64 (output_bfd,
13214 elf_gp (output_bfd) + TOC_BASE_OFF,
13215 htab->got->contents);
13216
13217 /* Set .got entry size. */
13218 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13219 }
13220
13221 if (htab->plt != NULL && htab->plt->size != 0)
13222 {
13223 /* Set .plt entry size. */
13224 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13225 = PLT_ENTRY_SIZE;
13226 }
13227
13228 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13229 brlt ourselves if emitrelocations. */
13230 if (htab->brlt != NULL
13231 && htab->brlt->reloc_count != 0
13232 && !_bfd_elf_link_output_relocs (output_bfd,
13233 htab->brlt,
13234 &elf_section_data (htab->brlt)->rel_hdr,
13235 elf_section_data (htab->brlt)->relocs,
13236 NULL))
13237 return FALSE;
13238
13239 if (htab->glink != NULL
13240 && htab->glink->reloc_count != 0
13241 && !_bfd_elf_link_output_relocs (output_bfd,
13242 htab->glink,
13243 &elf_section_data (htab->glink)->rel_hdr,
13244 elf_section_data (htab->glink)->relocs,
13245 NULL))
13246 return FALSE;
13247
13248 /* We need to handle writing out multiple GOT sections ourselves,
13249 since we didn't add them to DYNOBJ. We know dynobj is the first
13250 bfd. */
13251 while ((dynobj = dynobj->link_next) != NULL)
13252 {
13253 asection *s;
13254
13255 if (!is_ppc64_elf (dynobj))
13256 continue;
13257
13258 s = ppc64_elf_tdata (dynobj)->got;
13259 if (s != NULL
13260 && s->size != 0
13261 && s->output_section != bfd_abs_section_ptr
13262 && !bfd_set_section_contents (output_bfd, s->output_section,
13263 s->contents, s->output_offset,
13264 s->size))
13265 return FALSE;
13266 s = ppc64_elf_tdata (dynobj)->relgot;
13267 if (s != NULL
13268 && s->size != 0
13269 && s->output_section != bfd_abs_section_ptr
13270 && !bfd_set_section_contents (output_bfd, s->output_section,
13271 s->contents, s->output_offset,
13272 s->size))
13273 return FALSE;
13274 }
13275
13276 return TRUE;
13277 }
13278
13279 #include "elf64-target.h"
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