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* elf64-ppc.c (dec_dynrel_count): Don't report errors for local
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 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 <amodra@bigpond.net.au>
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 2 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 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_header_size 8
71 #define elf_backend_can_gc_sections 1
72 #define elf_backend_can_refcount 1
73 #define elf_backend_rela_normal 1
74
75 #define bfd_elf64_mkobject ppc64_elf_mkobject
76 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
77 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
78 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
79 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
80 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
81 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
82
83 #define elf_backend_object_p ppc64_elf_object_p
84 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
85 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
86 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
87 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
88 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
89 #define elf_backend_check_directives ppc64_elf_check_directives
90 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
91 #define elf_backend_check_relocs ppc64_elf_check_relocs
92 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
93 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
94 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
95 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
96 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
97 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
98 #define elf_backend_action_discarded ppc64_elf_action_discarded
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions used by the save and restore reg functions. */
178 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
179 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
180 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
181 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
182 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
183 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
184 #define LI_R12_0 0x39800000 /* li %r12,0 */
185 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
186 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
187 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
188 #define BLR 0x4e800020 /* blr */
189
190 /* Since .opd is an array of descriptors and each entry will end up
191 with identical R_PPC64_RELATIVE relocs, there is really no need to
192 propagate .opd relocs; The dynamic linker should be taught to
193 relocate .opd without reloc entries. */
194 #ifndef NO_OPD_RELOCS
195 #define NO_OPD_RELOCS 0
196 #endif
197 \f
198 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
199
200 /* Relocation HOWTO's. */
201 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
202
203 static reloc_howto_type ppc64_elf_howto_raw[] = {
204 /* This reloc does nothing. */
205 HOWTO (R_PPC64_NONE, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC64_NONE", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* A standard 32 bit relocation. */
220 HOWTO (R_PPC64_ADDR32, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR32", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* An absolute 26 bit branch; the lower two bits must be zero.
235 FIXME: we don't check that, we just clear them. */
236 HOWTO (R_PPC64_ADDR24, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 26, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR24", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0x03fffffc, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A standard 16 bit relocation. */
251 HOWTO (R_PPC64_ADDR16, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR16", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A 16 bit relocation without overflow. */
266 HOWTO (R_PPC64_ADDR16_LO, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16_LO", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* Bits 16-31 of an address. */
281 HOWTO (R_PPC64_ADDR16_HI, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_HI", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
296 bits, treated as a signed number, is negative. */
297 HOWTO (R_PPC64_ADDR16_HA, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 ppc64_elf_ha_reloc, /* special_function */
305 "R_PPC64_ADDR16_HA", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch; the lower two bits must be zero.
312 FIXME: we don't check that, we just clear them. */
313 HOWTO (R_PPC64_ADDR14, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_branch_reloc, /* special_function */
321 "R_PPC64_ADDR14", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is expected to be taken. The lower two
329 bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is not expected to be taken. The lower
346 two bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRNTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* A relative 26 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC64_REL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 ppc64_elf_branch_reloc, /* special_function */
370 "R_PPC64_REL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x03fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is expected to be taken. The lower two bits must be
393 zero. */
394 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRTAKEN", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is not expected to be taken. The lower two bits must
410 be zero. */
411 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
426 symbol. */
427 HOWTO (R_PPC64_GOT16, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_LO, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_LO", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HI, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HI", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HA, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HA", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* This is used only by the dynamic linker. The symbol should exist
490 both in the object being run and in some shared library. The
491 dynamic linker copies the data addressed by the symbol from the
492 shared library into the object, because the object being
493 run has to have the data at some particular address. */
494 HOWTO (R_PPC64_COPY, /* type */
495 0, /* rightshift */
496 0, /* this one is variable size */
497 0, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_COPY", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Like R_PPC64_ADDR64, but used when setting global offset table
509 entries. */
510 HOWTO (R_PPC64_GLOB_DAT, /* type */
511 0, /* rightshift */
512 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
513 64, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_GLOB_DAT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 ONES (64), /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Created by the link editor. Marks a procedure linkage table
525 entry for a symbol. */
526 HOWTO (R_PPC64_JMP_SLOT, /* type */
527 0, /* rightshift */
528 0, /* size (0 = byte, 1 = short, 2 = long) */
529 0, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 doubleword64 is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC64_RELATIVE, /* type */
544 0, /* rightshift */
545 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
546 64, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC64_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 ONES (64), /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC64_ADDR32, but may be unaligned. */
558 HOWTO (R_PPC64_UADDR32, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 32, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_UADDR32", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0xffffffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR16, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* 32-bit PC relative. */
588 HOWTO (R_PPC64_REL32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 TRUE, /* pc_relative */
593 0, /* bitpos */
594 /* FIXME: Verify. Was complain_overflow_bitfield. */
595 complain_overflow_signed, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_REL32", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffffffff, /* dst_mask */
601 TRUE), /* pcrel_offset */
602
603 /* 32-bit relocation to the symbol's procedure linkage table. */
604 HOWTO (R_PPC64_PLT32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 ppc64_elf_unhandled_reloc, /* special_function */
612 "R_PPC64_PLT32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
619 FIXME: R_PPC64_PLTREL32 not supported. */
620 HOWTO (R_PPC64_PLTREL32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 TRUE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_signed, /* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_PPC64_PLTREL32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 TRUE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_LO, /* type */
637 0, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_LO", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HI, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HI", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HA, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HA", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 16-bit section relative relocation. */
683 HOWTO (R_PPC64_SECTOFF, /* type */
684 0, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_bitfield, /* complain_on_overflow */
690 ppc64_elf_sectoff_reloc, /* special_function */
691 "R_PPC64_SECTOFF", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* Like R_PPC64_SECTOFF, but no overflow warning. */
698 HOWTO (R_PPC64_SECTOFF_LO, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_dont, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF_LO", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit upper half section relative relocation. */
713 HOWTO (R_PPC64_SECTOFF_HI, /* type */
714 16, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_HI", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half adjusted section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HA, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_ha_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HA", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* Like R_PPC64_REL24 without touching the two least significant bits. */
743 HOWTO (R_PPC64_REL30, /* type */
744 2, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 30, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_REL30", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xfffffffc, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
758
759 /* A standard 64-bit relocation. */
760 HOWTO (R_PPC64_ADDR64, /* type */
761 0, /* rightshift */
762 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
763 64, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_ADDR64", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 ONES (64), /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 /* The bits 32-47 of an address. */
775 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHER", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address, plus 1 if the contents of the low
790 16 bits, treated as a signed number, is negative. */
791 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 ppc64_elf_ha_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHERA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 48-63 of an address. */
806 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHEST", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address, plus 1 if the contents of the low
821 16 bits, treated as a signed number, is negative. */
822 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 ppc64_elf_ha_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHESTA", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* Like ADDR64, but may be unaligned. */
837 HOWTO (R_PPC64_UADDR64, /* type */
838 0, /* rightshift */
839 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
840 64, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_PPC64_UADDR64", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 ONES (64), /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* 64-bit relative relocation. */
852 HOWTO (R_PPC64_REL64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_REL64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 TRUE), /* pcrel_offset */
865
866 /* 64-bit relocation to the symbol's procedure linkage table. */
867 HOWTO (R_PPC64_PLT64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLT64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* 64-bit PC relative relocation to the symbol's procedure linkage
882 table. */
883 /* FIXME: R_PPC64_PLTREL64 not supported. */
884 HOWTO (R_PPC64_PLTREL64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 TRUE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLTREL64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 TRUE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation. */
899
900 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
901 HOWTO (R_PPC64_TOC16, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_signed, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation without overflow. */
916
917 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_LO, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_LO", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits. */
933
934 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HI, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_HI", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
950 contents of the low 16 bits, treated as a signed number, is
951 negative. */
952
953 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
954 HOWTO (R_PPC64_TOC16_HA, /* type */
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_toc_ha_reloc, /* special_function */
962 "R_PPC64_TOC16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 64-bit relocation; insert value of TOC base (.TOC.). */
969
970 /* R_PPC64_TOC 51 doubleword64 .TOC. */
971 HOWTO (R_PPC64_TOC, /* type */
972 0, /* rightshift */
973 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
974 64, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_bitfield, /* complain_on_overflow */
978 ppc64_elf_toc64_reloc, /* special_function */
979 "R_PPC64_TOC", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 ONES (64), /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like R_PPC64_GOT16, but also informs the link editor that the
986 value to relocate may (!) refer to a PLT entry which the link
987 editor (a) may replace with the symbol value. If the link editor
988 is unable to fully resolve the symbol, it may (b) create a PLT
989 entry and store the address to the new PLT entry in the GOT.
990 This permits lazy resolution of function symbols at run time.
991 The link editor may also skip all of this and just (c) emit a
992 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
993 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
994 HOWTO (R_PPC64_PLTGOT16, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLTGOT16, but without overflow. */
1009 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_LO", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1025 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HI", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1041 1 if the contents of the low 16 bits, treated as a signed number,
1042 is negative. */
1043 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1044 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 ppc64_elf_unhandled_reloc, /* special_function */
1052 "R_PPC64_PLTGOT16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1059 HOWTO (R_PPC64_ADDR16_DS, /* type */
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_bitfield, /* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_PPC64_ADDR16_DS", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xfffc, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont,/* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_LO_DS",/* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_GOT16_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_GOT16_DS", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_LO_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_PLT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_bitfield, /* complain_on_overflow */
1141 ppc64_elf_sectoff_reloc, /* special_function */
1142 "R_PPC64_SECTOFF_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_LO_DS",/* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_TOC16_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc64_elf_toc_reloc, /* special_function */
1172 "R_PPC64_TOC16_DS", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_LO_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_signed, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_LO_DS",/* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Marker reloc for TLS. */
1226 HOWTO (R_PPC64_TLS,
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC64_TLS", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes the load module index of the load module that contains the
1241 definition of its TLS sym. */
1242 HOWTO (R_PPC64_DTPMOD64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPMOD64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Computes a dtv-relative displacement, the difference between the value
1257 of sym+add and the base address of the thread-local storage block that
1258 contains the definition of sym, minus 0x8000. */
1259 HOWTO (R_PPC64_DTPREL64,
1260 0, /* rightshift */
1261 4, /* size (0 = byte, 1 = short, 2 = long) */
1262 64, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc64_elf_unhandled_reloc, /* special_function */
1267 "R_PPC64_DTPREL64", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 ONES (64), /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* A 16 bit dtprel reloc. */
1274 HOWTO (R_PPC64_DTPREL16,
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_signed, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_DTPREL16", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like DTPREL16, but no overflow. */
1289 HOWTO (R_PPC64_DTPREL16_LO,
1290 0, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc64_elf_unhandled_reloc, /* special_function */
1297 "R_PPC64_DTPREL16_LO", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1304 HOWTO (R_PPC64_DTPREL16_HI,
1305 16, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL16_HI", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1319 HOWTO (R_PPC64_DTPREL16_HA,
1320 16, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16_HA", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1334 HOWTO (R_PPC64_DTPREL16_HIGHER,
1335 32, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_HIGHER", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1350 32, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HIGHERA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1365 48, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HIGHEST", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1380 48, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but for insns with a DS field. */
1394 HOWTO (R_PPC64_DTPREL16_DS,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_signed, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_DS", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xfffc, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_DS, but no overflow. */
1409 HOWTO (R_PPC64_DTPREL16_LO_DS,
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_LO_DS", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xfffc, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Computes a tp-relative displacement, the difference between the value of
1424 sym+add and the value of the thread pointer (r13). */
1425 HOWTO (R_PPC64_TPREL64,
1426 0, /* rightshift */
1427 4, /* size (0 = byte, 1 = short, 2 = long) */
1428 64, /* bitsize */
1429 FALSE, /* pc_relative */
1430 0, /* bitpos */
1431 complain_overflow_dont, /* complain_on_overflow */
1432 ppc64_elf_unhandled_reloc, /* special_function */
1433 "R_PPC64_TPREL64", /* name */
1434 FALSE, /* partial_inplace */
1435 0, /* src_mask */
1436 ONES (64), /* dst_mask */
1437 FALSE), /* pcrel_offset */
1438
1439 /* A 16 bit tprel reloc. */
1440 HOWTO (R_PPC64_TPREL16,
1441 0, /* rightshift */
1442 1, /* size (0 = byte, 1 = short, 2 = long) */
1443 16, /* bitsize */
1444 FALSE, /* pc_relative */
1445 0, /* bitpos */
1446 complain_overflow_signed, /* complain_on_overflow */
1447 ppc64_elf_unhandled_reloc, /* special_function */
1448 "R_PPC64_TPREL16", /* name */
1449 FALSE, /* partial_inplace */
1450 0, /* src_mask */
1451 0xffff, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1453
1454 /* Like TPREL16, but no overflow. */
1455 HOWTO (R_PPC64_TPREL16_LO,
1456 0, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 FALSE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc64_elf_unhandled_reloc, /* special_function */
1463 "R_PPC64_TPREL16_LO", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1468
1469 /* Like TPREL16_LO, but next higher group of 16 bits. */
1470 HOWTO (R_PPC64_TPREL16_HI,
1471 16, /* rightshift */
1472 1, /* size (0 = byte, 1 = short, 2 = long) */
1473 16, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL16_HI", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0xffff, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* Like TPREL16_HI, but adjust for low 16 bits. */
1485 HOWTO (R_PPC64_TPREL16_HA,
1486 16, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16_HA", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16_HI, but next higher group of 16 bits. */
1500 HOWTO (R_PPC64_TPREL16_HIGHER,
1501 32, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_HIGHER", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HIGHERA,
1516 32, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HIGHERA", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HIGHEST,
1531 48, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HIGHEST", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1546 48, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHESTA", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but for insns with a DS field. */
1560 HOWTO (R_PPC64_TPREL16_DS,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_signed, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_DS", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xfffc, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_DS, but no overflow. */
1575 HOWTO (R_PPC64_TPREL16_LO_DS,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_LO_DS", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xfffc, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1590 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1591 to the first entry relative to the TOC base (r2). */
1592 HOWTO (R_PPC64_GOT_TLSGD16,
1593 0, /* rightshift */
1594 1, /* size (0 = byte, 1 = short, 2 = long) */
1595 16, /* bitsize */
1596 FALSE, /* pc_relative */
1597 0, /* bitpos */
1598 complain_overflow_signed, /* complain_on_overflow */
1599 ppc64_elf_unhandled_reloc, /* special_function */
1600 "R_PPC64_GOT_TLSGD16", /* name */
1601 FALSE, /* partial_inplace */
1602 0, /* src_mask */
1603 0xffff, /* dst_mask */
1604 FALSE), /* pcrel_offset */
1605
1606 /* Like GOT_TLSGD16, but no overflow. */
1607 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1608 0, /* rightshift */
1609 1, /* size (0 = byte, 1 = short, 2 = long) */
1610 16, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 ppc64_elf_unhandled_reloc, /* special_function */
1615 "R_PPC64_GOT_TLSGD16_LO", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0xffff, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1622 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1623 16, /* rightshift */
1624 1, /* size (0 = byte, 1 = short, 2 = long) */
1625 16, /* bitsize */
1626 FALSE, /* pc_relative */
1627 0, /* bitpos */
1628 complain_overflow_dont, /* complain_on_overflow */
1629 ppc64_elf_unhandled_reloc, /* special_function */
1630 "R_PPC64_GOT_TLSGD16_HI", /* name */
1631 FALSE, /* partial_inplace */
1632 0, /* src_mask */
1633 0xffff, /* dst_mask */
1634 FALSE), /* pcrel_offset */
1635
1636 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1637 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1638 16, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16_HA", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1652 with values (sym+add)@dtpmod and zero, and computes the offset to the
1653 first entry relative to the TOC base (r2). */
1654 HOWTO (R_PPC64_GOT_TLSLD16,
1655 0, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_signed, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_GOT_TLSLD16", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like GOT_TLSLD16, but no overflow. */
1669 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_dont, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_GOT_TLSLD16_LO", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xffff, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1684 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1685 16, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_GOT_TLSLD16_HI", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xffff, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1699 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1700 16, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_dont, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16_HA", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1714 the offset to the entry relative to the TOC base (r2). */
1715 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1716 0, /* rightshift */
1717 1, /* size (0 = byte, 1 = short, 2 = long) */
1718 16, /* bitsize */
1719 FALSE, /* pc_relative */
1720 0, /* bitpos */
1721 complain_overflow_signed, /* complain_on_overflow */
1722 ppc64_elf_unhandled_reloc, /* special_function */
1723 "R_PPC64_GOT_DTPREL16_DS", /* name */
1724 FALSE, /* partial_inplace */
1725 0, /* src_mask */
1726 0xfffc, /* dst_mask */
1727 FALSE), /* pcrel_offset */
1728
1729 /* Like GOT_DTPREL16_DS, but no overflow. */
1730 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1731 0, /* rightshift */
1732 1, /* size (0 = byte, 1 = short, 2 = long) */
1733 16, /* bitsize */
1734 FALSE, /* pc_relative */
1735 0, /* bitpos */
1736 complain_overflow_dont, /* complain_on_overflow */
1737 ppc64_elf_unhandled_reloc, /* special_function */
1738 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1739 FALSE, /* partial_inplace */
1740 0, /* src_mask */
1741 0xfffc, /* dst_mask */
1742 FALSE), /* pcrel_offset */
1743
1744 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1745 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1746 16, /* rightshift */
1747 1, /* size (0 = byte, 1 = short, 2 = long) */
1748 16, /* bitsize */
1749 FALSE, /* pc_relative */
1750 0, /* bitpos */
1751 complain_overflow_dont, /* complain_on_overflow */
1752 ppc64_elf_unhandled_reloc, /* special_function */
1753 "R_PPC64_GOT_DTPREL16_HI", /* name */
1754 FALSE, /* partial_inplace */
1755 0, /* src_mask */
1756 0xffff, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1758
1759 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1760 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1761 16, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_dont, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_HA", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xffff, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1775 offset to the entry relative to the TOC base (r2). */
1776 HOWTO (R_PPC64_GOT_TPREL16_DS,
1777 0, /* rightshift */
1778 1, /* size (0 = byte, 1 = short, 2 = long) */
1779 16, /* bitsize */
1780 FALSE, /* pc_relative */
1781 0, /* bitpos */
1782 complain_overflow_signed, /* complain_on_overflow */
1783 ppc64_elf_unhandled_reloc, /* special_function */
1784 "R_PPC64_GOT_TPREL16_DS", /* name */
1785 FALSE, /* partial_inplace */
1786 0, /* src_mask */
1787 0xfffc, /* dst_mask */
1788 FALSE), /* pcrel_offset */
1789
1790 /* Like GOT_TPREL16_DS, but no overflow. */
1791 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1792 0, /* rightshift */
1793 1, /* size (0 = byte, 1 = short, 2 = long) */
1794 16, /* bitsize */
1795 FALSE, /* pc_relative */
1796 0, /* bitpos */
1797 complain_overflow_dont, /* complain_on_overflow */
1798 ppc64_elf_unhandled_reloc, /* special_function */
1799 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1800 FALSE, /* partial_inplace */
1801 0, /* src_mask */
1802 0xfffc, /* dst_mask */
1803 FALSE), /* pcrel_offset */
1804
1805 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1806 HOWTO (R_PPC64_GOT_TPREL16_HI,
1807 16, /* rightshift */
1808 1, /* size (0 = byte, 1 = short, 2 = long) */
1809 16, /* bitsize */
1810 FALSE, /* pc_relative */
1811 0, /* bitpos */
1812 complain_overflow_dont, /* complain_on_overflow */
1813 ppc64_elf_unhandled_reloc, /* special_function */
1814 "R_PPC64_GOT_TPREL16_HI", /* name */
1815 FALSE, /* partial_inplace */
1816 0, /* src_mask */
1817 0xffff, /* dst_mask */
1818 FALSE), /* pcrel_offset */
1819
1820 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1821 HOWTO (R_PPC64_GOT_TPREL16_HA,
1822 16, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_dont, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_HA", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xffff, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* GNU extension to record C++ vtable hierarchy. */
1836 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1837 0, /* rightshift */
1838 0, /* size (0 = byte, 1 = short, 2 = long) */
1839 0, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 NULL, /* special_function */
1844 "R_PPC64_GNU_VTINHERIT", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* GNU extension to record C++ vtable member usage. */
1851 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1852 0, /* rightshift */
1853 0, /* size (0 = byte, 1 = short, 2 = long) */
1854 0, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 NULL, /* special_function */
1859 "R_PPC64_GNU_VTENTRY", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864 };
1865
1866 \f
1867 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1868 be done. */
1869
1870 static void
1871 ppc_howto_init (void)
1872 {
1873 unsigned int i, type;
1874
1875 for (i = 0;
1876 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1877 i++)
1878 {
1879 type = ppc64_elf_howto_raw[i].type;
1880 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1881 / sizeof (ppc64_elf_howto_table[0])));
1882 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1883 }
1884 }
1885
1886 static reloc_howto_type *
1887 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1888 bfd_reloc_code_real_type code)
1889 {
1890 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1891
1892 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1893 /* Initialize howto table if needed. */
1894 ppc_howto_init ();
1895
1896 switch (code)
1897 {
1898 default:
1899 return NULL;
1900
1901 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1902 break;
1903 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1904 break;
1905 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1906 break;
1907 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1908 break;
1909 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1910 break;
1911 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1912 break;
1913 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1914 break;
1915 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1916 break;
1917 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1922 break;
1923 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1924 break;
1925 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1928 break;
1929 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1930 break;
1931 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1936 break;
1937 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1938 break;
1939 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1940 break;
1941 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1942 break;
1943 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1944 break;
1945 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1946 break;
1947 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1948 break;
1949 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1952 break;
1953 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1954 break;
1955 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1956 break;
1957 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1958 break;
1959 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1960 break;
1961 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1962 break;
1963 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1972 break;
1973 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1974 break;
1975 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1976 break;
1977 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1978 break;
1979 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1980 break;
1981 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1986 break;
1987 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1988 break;
1989 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1996 break;
1997 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2014 break;
2015 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2020 break;
2021 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2022 break;
2023 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2030 break;
2031 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2100 break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2102 break;
2103 }
2104
2105 return ppc64_elf_howto_table[r];
2106 };
2107
2108 /* Set the howto pointer for a PowerPC ELF reloc. */
2109
2110 static void
2111 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 unsigned int type;
2115
2116 /* Initialize howto table if needed. */
2117 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2118 ppc_howto_init ();
2119
2120 type = ELF64_R_TYPE (dst->r_info);
2121 if (type >= (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])))
2123 {
2124 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2125 abfd, (int) type);
2126 type = R_PPC64_NONE;
2127 }
2128 cache_ptr->howto = ppc64_elf_howto_table[type];
2129 }
2130
2131 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2132
2133 static bfd_reloc_status_type
2134 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2135 void *data, asection *input_section,
2136 bfd *output_bfd, char **error_message)
2137 {
2138 /* If this is a relocatable link (output_bfd test tells us), just
2139 call the generic function. Any adjustment will be done at final
2140 link time. */
2141 if (output_bfd != NULL)
2142 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2143 input_section, output_bfd, error_message);
2144
2145 /* Adjust the addend for sign extension of the low 16 bits.
2146 We won't actually be using the low 16 bits, so trashing them
2147 doesn't matter. */
2148 reloc_entry->addend += 0x8000;
2149 return bfd_reloc_continue;
2150 }
2151
2152 static bfd_reloc_status_type
2153 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2154 void *data, asection *input_section,
2155 bfd *output_bfd, char **error_message)
2156 {
2157 if (output_bfd != NULL)
2158 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2159 input_section, output_bfd, error_message);
2160
2161 if (strcmp (symbol->section->name, ".opd") == 0
2162 && (symbol->section->owner->flags & DYNAMIC) == 0)
2163 {
2164 bfd_vma dest = opd_entry_value (symbol->section,
2165 symbol->value + reloc_entry->addend,
2166 NULL, NULL);
2167 if (dest != (bfd_vma) -1)
2168 reloc_entry->addend = dest - (symbol->value
2169 + symbol->section->output_section->vma
2170 + symbol->section->output_offset);
2171 }
2172 return bfd_reloc_continue;
2173 }
2174
2175 static bfd_reloc_status_type
2176 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2177 void *data, asection *input_section,
2178 bfd *output_bfd, char **error_message)
2179 {
2180 long insn;
2181 enum elf_ppc64_reloc_type r_type;
2182 bfd_size_type octets;
2183 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2184 bfd_boolean is_power4 = FALSE;
2185
2186 /* If this is a relocatable link (output_bfd test tells us), just
2187 call the generic function. Any adjustment will be done at final
2188 link time. */
2189 if (output_bfd != NULL)
2190 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2191 input_section, output_bfd, error_message);
2192
2193 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2194 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2195 insn &= ~(0x01 << 21);
2196 r_type = reloc_entry->howto->type;
2197 if (r_type == R_PPC64_ADDR14_BRTAKEN
2198 || r_type == R_PPC64_REL14_BRTAKEN)
2199 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2200
2201 if (is_power4)
2202 {
2203 /* Set 'a' bit. This is 0b00010 in BO field for branch
2204 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2205 for branch on CTR insns (BO == 1a00t or 1a01t). */
2206 if ((insn & (0x14 << 21)) == (0x04 << 21))
2207 insn |= 0x02 << 21;
2208 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2209 insn |= 0x08 << 21;
2210 else
2211 goto out;
2212 }
2213 else
2214 {
2215 bfd_vma target = 0;
2216 bfd_vma from;
2217
2218 if (!bfd_is_com_section (symbol->section))
2219 target = symbol->value;
2220 target += symbol->section->output_section->vma;
2221 target += symbol->section->output_offset;
2222 target += reloc_entry->addend;
2223
2224 from = (reloc_entry->address
2225 + input_section->output_offset
2226 + input_section->output_section->vma);
2227
2228 /* Invert 'y' bit if not the default. */
2229 if ((bfd_signed_vma) (target - from) < 0)
2230 insn ^= 0x01 << 21;
2231 }
2232 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2233 out:
2234 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2235 input_section, output_bfd, error_message);
2236 }
2237
2238 static bfd_reloc_status_type
2239 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2240 void *data, asection *input_section,
2241 bfd *output_bfd, char **error_message)
2242 {
2243 /* If this is a relocatable link (output_bfd test tells us), just
2244 call the generic function. Any adjustment will be done at final
2245 link time. */
2246 if (output_bfd != NULL)
2247 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2248 input_section, output_bfd, error_message);
2249
2250 /* Subtract the symbol section base address. */
2251 reloc_entry->addend -= symbol->section->output_section->vma;
2252 return bfd_reloc_continue;
2253 }
2254
2255 static bfd_reloc_status_type
2256 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2257 void *data, asection *input_section,
2258 bfd *output_bfd, char **error_message)
2259 {
2260 /* If this is a relocatable link (output_bfd test tells us), just
2261 call the generic function. Any adjustment will be done at final
2262 link time. */
2263 if (output_bfd != NULL)
2264 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2265 input_section, output_bfd, error_message);
2266
2267 /* Subtract the symbol section base address. */
2268 reloc_entry->addend -= symbol->section->output_section->vma;
2269
2270 /* Adjust the addend for sign extension of the low 16 bits. */
2271 reloc_entry->addend += 0x8000;
2272 return bfd_reloc_continue;
2273 }
2274
2275 static bfd_reloc_status_type
2276 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2277 void *data, asection *input_section,
2278 bfd *output_bfd, char **error_message)
2279 {
2280 bfd_vma TOCstart;
2281
2282 /* If this is a relocatable link (output_bfd test tells us), just
2283 call the generic function. Any adjustment will be done at final
2284 link time. */
2285 if (output_bfd != NULL)
2286 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2287 input_section, output_bfd, error_message);
2288
2289 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2290 if (TOCstart == 0)
2291 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2292
2293 /* Subtract the TOC base address. */
2294 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2295 return bfd_reloc_continue;
2296 }
2297
2298 static bfd_reloc_status_type
2299 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2300 void *data, asection *input_section,
2301 bfd *output_bfd, char **error_message)
2302 {
2303 bfd_vma TOCstart;
2304
2305 /* If this is a relocatable link (output_bfd test tells us), just
2306 call the generic function. Any adjustment will be done at final
2307 link time. */
2308 if (output_bfd != NULL)
2309 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2310 input_section, output_bfd, error_message);
2311
2312 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2313 if (TOCstart == 0)
2314 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2315
2316 /* Subtract the TOC base address. */
2317 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2318
2319 /* Adjust the addend for sign extension of the low 16 bits. */
2320 reloc_entry->addend += 0x8000;
2321 return bfd_reloc_continue;
2322 }
2323
2324 static bfd_reloc_status_type
2325 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2326 void *data, asection *input_section,
2327 bfd *output_bfd, char **error_message)
2328 {
2329 bfd_vma TOCstart;
2330 bfd_size_type octets;
2331
2332 /* If this is a relocatable link (output_bfd test tells us), just
2333 call the generic function. Any adjustment will be done at final
2334 link time. */
2335 if (output_bfd != NULL)
2336 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2337 input_section, output_bfd, error_message);
2338
2339 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2340 if (TOCstart == 0)
2341 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2342
2343 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2344 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2345 return bfd_reloc_ok;
2346 }
2347
2348 static bfd_reloc_status_type
2349 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2350 void *data, asection *input_section,
2351 bfd *output_bfd, char **error_message)
2352 {
2353 /* If this is a relocatable link (output_bfd test tells us), just
2354 call the generic function. Any adjustment will be done at final
2355 link time. */
2356 if (output_bfd != NULL)
2357 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2358 input_section, output_bfd, error_message);
2359
2360 if (error_message != NULL)
2361 {
2362 static char buf[60];
2363 sprintf (buf, "generic linker can't handle %s",
2364 reloc_entry->howto->name);
2365 *error_message = buf;
2366 }
2367 return bfd_reloc_dangerous;
2368 }
2369
2370 struct ppc64_elf_obj_tdata
2371 {
2372 struct elf_obj_tdata elf;
2373
2374 /* Shortcuts to dynamic linker sections. */
2375 asection *got;
2376 asection *relgot;
2377
2378 union {
2379 /* Used during garbage collection. We attach global symbols defined
2380 on removed .opd entries to this section so that the sym is removed. */
2381 asection *deleted_section;
2382
2383 /* Used when adding symbols. */
2384 bfd_boolean has_dotsym;
2385 } u;
2386
2387 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2388 sections means we potentially need one of these for each input bfd. */
2389 union {
2390 bfd_signed_vma refcount;
2391 bfd_vma offset;
2392 } tlsld_got;
2393
2394 /* A copy of relocs before they are modified for --emit-relocs. */
2395 Elf_Internal_Rela *opd_relocs;
2396 };
2397
2398 #define ppc64_elf_tdata(bfd) \
2399 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2400
2401 #define ppc64_tlsld_got(bfd) \
2402 (&ppc64_elf_tdata (bfd)->tlsld_got)
2403
2404 /* Override the generic function because we store some extras. */
2405
2406 static bfd_boolean
2407 ppc64_elf_mkobject (bfd *abfd)
2408 {
2409 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2410 abfd->tdata.any = bfd_zalloc (abfd, amt);
2411 if (abfd->tdata.any == NULL)
2412 return FALSE;
2413 return TRUE;
2414 }
2415
2416 /* Return 1 if target is one of ours. */
2417
2418 static bfd_boolean
2419 is_ppc64_elf_target (const struct bfd_target *targ)
2420 {
2421 extern const bfd_target bfd_elf64_powerpc_vec;
2422 extern const bfd_target bfd_elf64_powerpcle_vec;
2423
2424 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2425 }
2426
2427 /* Fix bad default arch selected for a 64 bit input bfd when the
2428 default is 32 bit. */
2429
2430 static bfd_boolean
2431 ppc64_elf_object_p (bfd *abfd)
2432 {
2433 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2434 {
2435 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2436
2437 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2438 {
2439 /* Relies on arch after 32 bit default being 64 bit default. */
2440 abfd->arch_info = abfd->arch_info->next;
2441 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2442 }
2443 }
2444 return TRUE;
2445 }
2446
2447 /* Support for core dump NOTE sections. */
2448
2449 static bfd_boolean
2450 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2451 {
2452 size_t offset, size;
2453
2454 if (note->descsz != 504)
2455 return FALSE;
2456
2457 /* pr_cursig */
2458 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2459
2460 /* pr_pid */
2461 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2462
2463 /* pr_reg */
2464 offset = 112;
2465 size = 384;
2466
2467 /* Make a ".reg/999" section. */
2468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2469 size, note->descpos + offset);
2470 }
2471
2472 static bfd_boolean
2473 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2474 {
2475 if (note->descsz != 136)
2476 return FALSE;
2477
2478 elf_tdata (abfd)->core_program
2479 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2480 elf_tdata (abfd)->core_command
2481 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2482
2483 return TRUE;
2484 }
2485
2486 /* Merge backend specific data from an object file to the output
2487 object file when linking. */
2488
2489 static bfd_boolean
2490 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2491 {
2492 /* Check if we have the same endianess. */
2493 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2494 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2495 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2496 {
2497 const char *msg;
2498
2499 if (bfd_big_endian (ibfd))
2500 msg = _("%B: compiled for a big endian system "
2501 "and target is little endian");
2502 else
2503 msg = _("%B: compiled for a little endian system "
2504 "and target is big endian");
2505
2506 (*_bfd_error_handler) (msg, ibfd);
2507
2508 bfd_set_error (bfd_error_wrong_format);
2509 return FALSE;
2510 }
2511
2512 return TRUE;
2513 }
2514
2515 /* Add extra PPC sections. */
2516
2517 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2518 {
2519 { ".plt", 4, 0, SHT_NOBITS, 0 },
2520 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2521 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2523 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2524 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2525 { NULL, 0, 0, 0, 0 }
2526 };
2527
2528 struct _ppc64_elf_section_data
2529 {
2530 struct bfd_elf_section_data elf;
2531
2532 /* An array with one entry for each opd function descriptor. */
2533 union
2534 {
2535 /* Points to the function code section for local opd entries. */
2536 asection **func_sec;
2537 /* After editing .opd, adjust references to opd local syms. */
2538 long *adjust;
2539 } opd;
2540
2541 /* An array for toc sections, indexed by offset/8.
2542 Specifies the relocation symbol index used at a given toc offset. */
2543 unsigned *t_symndx;
2544 };
2545
2546 #define ppc64_elf_section_data(sec) \
2547 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2548
2549 static bfd_boolean
2550 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2551 {
2552 struct _ppc64_elf_section_data *sdata;
2553 bfd_size_type amt = sizeof (*sdata);
2554
2555 sdata = bfd_zalloc (abfd, amt);
2556 if (sdata == NULL)
2557 return FALSE;
2558 sec->used_by_bfd = sdata;
2559
2560 return _bfd_elf_new_section_hook (abfd, sec);
2561 }
2562
2563 static void *
2564 get_opd_info (asection * sec)
2565 {
2566 if (sec != NULL
2567 && ppc64_elf_section_data (sec) != NULL
2568 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2569 return ppc64_elf_section_data (sec)->opd.adjust;
2570 return NULL;
2571 }
2572 \f
2573 /* Parameters for the qsort hook. */
2574 static asection *synthetic_opd;
2575 static bfd_boolean synthetic_relocatable;
2576
2577 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2578
2579 static int
2580 compare_symbols (const void *ap, const void *bp)
2581 {
2582 const asymbol *a = * (const asymbol **) ap;
2583 const asymbol *b = * (const asymbol **) bp;
2584
2585 /* Section symbols first. */
2586 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2587 return -1;
2588 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2589 return 1;
2590
2591 /* then .opd symbols. */
2592 if (a->section == synthetic_opd && b->section != synthetic_opd)
2593 return -1;
2594 if (a->section != synthetic_opd && b->section == synthetic_opd)
2595 return 1;
2596
2597 /* then other code symbols. */
2598 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2599 == (SEC_CODE | SEC_ALLOC)
2600 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2601 != (SEC_CODE | SEC_ALLOC))
2602 return -1;
2603
2604 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2605 != (SEC_CODE | SEC_ALLOC)
2606 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2607 == (SEC_CODE | SEC_ALLOC))
2608 return 1;
2609
2610 if (synthetic_relocatable)
2611 {
2612 if (a->section->id < b->section->id)
2613 return -1;
2614
2615 if (a->section->id > b->section->id)
2616 return 1;
2617 }
2618
2619 if (a->value + a->section->vma < b->value + b->section->vma)
2620 return -1;
2621
2622 if (a->value + a->section->vma > b->value + b->section->vma)
2623 return 1;
2624
2625 return 0;
2626 }
2627
2628 /* Search SYMS for a symbol of the given VALUE. */
2629
2630 static asymbol *
2631 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2632 {
2633 long mid;
2634
2635 if (id == -1)
2636 {
2637 while (lo < hi)
2638 {
2639 mid = (lo + hi) >> 1;
2640 if (syms[mid]->value + syms[mid]->section->vma < value)
2641 lo = mid + 1;
2642 else if (syms[mid]->value + syms[mid]->section->vma > value)
2643 hi = mid;
2644 else
2645 return syms[mid];
2646 }
2647 }
2648 else
2649 {
2650 while (lo < hi)
2651 {
2652 mid = (lo + hi) >> 1;
2653 if (syms[mid]->section->id < id)
2654 lo = mid + 1;
2655 else if (syms[mid]->section->id > id)
2656 hi = mid;
2657 else if (syms[mid]->value < value)
2658 lo = mid + 1;
2659 else if (syms[mid]->value > value)
2660 hi = mid;
2661 else
2662 return syms[mid];
2663 }
2664 }
2665 return NULL;
2666 }
2667
2668 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2669 entry syms. */
2670
2671 static long
2672 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2673 long static_count, asymbol **static_syms,
2674 long dyn_count, asymbol **dyn_syms,
2675 asymbol **ret)
2676 {
2677 asymbol *s;
2678 long i;
2679 long count;
2680 char *names;
2681 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2682 asection *opd;
2683 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2684 asymbol **syms;
2685
2686 *ret = NULL;
2687
2688 opd = bfd_get_section_by_name (abfd, ".opd");
2689 if (opd == NULL)
2690 return 0;
2691
2692 symcount = static_count;
2693 if (!relocatable)
2694 symcount += dyn_count;
2695 if (symcount == 0)
2696 return 0;
2697
2698 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2699 if (syms == NULL)
2700 return -1;
2701
2702 if (!relocatable && static_count != 0 && dyn_count != 0)
2703 {
2704 /* Use both symbol tables. */
2705 memcpy (syms, static_syms, static_count * sizeof (*syms));
2706 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2707 }
2708 else if (!relocatable && static_count == 0)
2709 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2710 else
2711 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2712
2713 synthetic_opd = opd;
2714 synthetic_relocatable = relocatable;
2715 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2716
2717 if (!relocatable && symcount > 1)
2718 {
2719 long j;
2720 /* Trim duplicate syms, since we may have merged the normal and
2721 dynamic symbols. Actually, we only care about syms that have
2722 different values, so trim any with the same value. */
2723 for (i = 1, j = 1; i < symcount; ++i)
2724 if (syms[i - 1]->value + syms[i - 1]->section->vma
2725 != syms[i]->value + syms[i]->section->vma)
2726 syms[j++] = syms[i];
2727 symcount = j;
2728 }
2729
2730 i = 0;
2731 if (syms[i]->section == opd)
2732 ++i;
2733 codesecsym = i;
2734
2735 for (; i < symcount; ++i)
2736 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2737 != (SEC_CODE | SEC_ALLOC))
2738 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2739 break;
2740 codesecsymend = i;
2741
2742 for (; i < symcount; ++i)
2743 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2744 break;
2745 secsymend = i;
2746
2747 for (; i < symcount; ++i)
2748 if (syms[i]->section != opd)
2749 break;
2750 opdsymend = i;
2751
2752 for (; i < symcount; ++i)
2753 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2754 != (SEC_CODE | SEC_ALLOC))
2755 break;
2756 symcount = i;
2757
2758 count = 0;
2759 if (opdsymend == secsymend)
2760 goto done;
2761
2762 if (relocatable)
2763 {
2764 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2765 arelent *r;
2766 size_t size;
2767 long relcount;
2768
2769 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2770 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2771 if (relcount == 0)
2772 goto done;
2773
2774 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2775 {
2776 count = -1;
2777 goto done;
2778 }
2779
2780 size = 0;
2781 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2782 {
2783 asymbol *sym;
2784
2785 while (r < opd->relocation + relcount
2786 && r->address < syms[i]->value + opd->vma)
2787 ++r;
2788
2789 if (r == opd->relocation + relcount)
2790 break;
2791
2792 if (r->address != syms[i]->value + opd->vma)
2793 continue;
2794
2795 if (r->howto->type != R_PPC64_ADDR64)
2796 continue;
2797
2798 sym = *r->sym_ptr_ptr;
2799 if (!sym_exists_at (syms, opdsymend, symcount,
2800 sym->section->id, sym->value + r->addend))
2801 {
2802 ++count;
2803 size += sizeof (asymbol);
2804 size += strlen (syms[i]->name) + 2;
2805 }
2806 }
2807
2808 s = *ret = bfd_malloc (size);
2809 if (s == NULL)
2810 {
2811 count = -1;
2812 goto done;
2813 }
2814
2815 names = (char *) (s + count);
2816
2817 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2818 {
2819 asymbol *sym;
2820
2821 while (r < opd->relocation + relcount
2822 && r->address < syms[i]->value + opd->vma)
2823 ++r;
2824
2825 if (r == opd->relocation + relcount)
2826 break;
2827
2828 if (r->address != syms[i]->value + opd->vma)
2829 continue;
2830
2831 if (r->howto->type != R_PPC64_ADDR64)
2832 continue;
2833
2834 sym = *r->sym_ptr_ptr;
2835 if (!sym_exists_at (syms, opdsymend, symcount,
2836 sym->section->id, sym->value + r->addend))
2837 {
2838 size_t len;
2839
2840 *s = *syms[i];
2841 s->section = sym->section;
2842 s->value = sym->value + r->addend;
2843 s->name = names;
2844 *names++ = '.';
2845 len = strlen (syms[i]->name);
2846 memcpy (names, syms[i]->name, len + 1);
2847 names += len + 1;
2848 s++;
2849 }
2850 }
2851 }
2852 else
2853 {
2854 bfd_byte *contents;
2855 size_t size;
2856
2857 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2858 {
2859 if (contents)
2860 {
2861 free_contents_and_exit:
2862 free (contents);
2863 }
2864 count = -1;
2865 goto done;
2866 }
2867
2868 size = 0;
2869 for (i = secsymend; i < opdsymend; ++i)
2870 {
2871 bfd_vma ent;
2872
2873 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2874 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2875 {
2876 ++count;
2877 size += sizeof (asymbol);
2878 size += strlen (syms[i]->name) + 2;
2879 }
2880 }
2881
2882 s = *ret = bfd_malloc (size);
2883 if (s == NULL)
2884 goto free_contents_and_exit;
2885
2886 names = (char *) (s + count);
2887
2888 for (i = secsymend; i < opdsymend; ++i)
2889 {
2890 bfd_vma ent;
2891
2892 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2893 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2894 {
2895 long lo, hi;
2896 size_t len;
2897 asection *sec = abfd->sections;
2898
2899 *s = *syms[i];
2900 lo = codesecsym;
2901 hi = codesecsymend;
2902 while (lo < hi)
2903 {
2904 long mid = (lo + hi) >> 1;
2905 if (syms[mid]->section->vma < ent)
2906 lo = mid + 1;
2907 else if (syms[mid]->section->vma > ent)
2908 hi = mid;
2909 else
2910 {
2911 sec = syms[mid]->section;
2912 break;
2913 }
2914 }
2915
2916 if (lo >= hi && lo > codesecsym)
2917 sec = syms[lo - 1]->section;
2918
2919 for (; sec != NULL; sec = sec->next)
2920 {
2921 if (sec->vma > ent)
2922 break;
2923 if ((sec->flags & SEC_ALLOC) == 0
2924 || (sec->flags & SEC_LOAD) == 0)
2925 break;
2926 if ((sec->flags & SEC_CODE) != 0)
2927 s->section = sec;
2928 }
2929 s->value = ent - s->section->vma;
2930 s->name = names;
2931 *names++ = '.';
2932 len = strlen (syms[i]->name);
2933 memcpy (names, syms[i]->name, len + 1);
2934 names += len + 1;
2935 s++;
2936 }
2937 }
2938 free (contents);
2939 }
2940
2941 done:
2942 free (syms);
2943 return count;
2944 }
2945 \f
2946 /* The following functions are specific to the ELF linker, while
2947 functions above are used generally. Those named ppc64_elf_* are
2948 called by the main ELF linker code. They appear in this file more
2949 or less in the order in which they are called. eg.
2950 ppc64_elf_check_relocs is called early in the link process,
2951 ppc64_elf_finish_dynamic_sections is one of the last functions
2952 called.
2953
2954 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2955 functions have both a function code symbol and a function descriptor
2956 symbol. A call to foo in a relocatable object file looks like:
2957
2958 . .text
2959 . x:
2960 . bl .foo
2961 . nop
2962
2963 The function definition in another object file might be:
2964
2965 . .section .opd
2966 . foo: .quad .foo
2967 . .quad .TOC.@tocbase
2968 . .quad 0
2969 .
2970 . .text
2971 . .foo: blr
2972
2973 When the linker resolves the call during a static link, the branch
2974 unsurprisingly just goes to .foo and the .opd information is unused.
2975 If the function definition is in a shared library, things are a little
2976 different: The call goes via a plt call stub, the opd information gets
2977 copied to the plt, and the linker patches the nop.
2978
2979 . x:
2980 . bl .foo_stub
2981 . ld 2,40(1)
2982 .
2983 .
2984 . .foo_stub:
2985 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2986 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2987 . std 2,40(1) # this is the general idea
2988 . ld 11,0(12)
2989 . ld 2,8(12)
2990 . mtctr 11
2991 . ld 11,16(12)
2992 . bctr
2993 .
2994 . .section .plt
2995 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2996
2997 The "reloc ()" notation is supposed to indicate that the linker emits
2998 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2999 copying.
3000
3001 What are the difficulties here? Well, firstly, the relocations
3002 examined by the linker in check_relocs are against the function code
3003 sym .foo, while the dynamic relocation in the plt is emitted against
3004 the function descriptor symbol, foo. Somewhere along the line, we need
3005 to carefully copy dynamic link information from one symbol to the other.
3006 Secondly, the generic part of the elf linker will make .foo a dynamic
3007 symbol as is normal for most other backends. We need foo dynamic
3008 instead, at least for an application final link. However, when
3009 creating a shared library containing foo, we need to have both symbols
3010 dynamic so that references to .foo are satisfied during the early
3011 stages of linking. Otherwise the linker might decide to pull in a
3012 definition from some other object, eg. a static library.
3013
3014 Update: As of August 2004, we support a new convention. Function
3015 calls may use the function descriptor symbol, ie. "bl foo". This
3016 behaves exactly as "bl .foo". */
3017
3018 /* The linker needs to keep track of the number of relocs that it
3019 decides to copy as dynamic relocs in check_relocs for each symbol.
3020 This is so that it can later discard them if they are found to be
3021 unnecessary. We store the information in a field extending the
3022 regular ELF linker hash table. */
3023
3024 struct ppc_dyn_relocs
3025 {
3026 struct ppc_dyn_relocs *next;
3027
3028 /* The input section of the reloc. */
3029 asection *sec;
3030
3031 /* Total number of relocs copied for the input section. */
3032 bfd_size_type count;
3033
3034 /* Number of pc-relative relocs copied for the input section. */
3035 bfd_size_type pc_count;
3036 };
3037
3038 /* Track GOT entries needed for a given symbol. We might need more
3039 than one got entry per symbol. */
3040 struct got_entry
3041 {
3042 struct got_entry *next;
3043
3044 /* The symbol addend that we'll be placing in the GOT. */
3045 bfd_vma addend;
3046
3047 /* Unlike other ELF targets, we use separate GOT entries for the same
3048 symbol referenced from different input files. This is to support
3049 automatic multiple TOC/GOT sections, where the TOC base can vary
3050 from one input file to another.
3051
3052 Point to the BFD owning this GOT entry. */
3053 bfd *owner;
3054
3055 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3056 TLS_TPREL or TLS_DTPREL for tls entries. */
3057 char tls_type;
3058
3059 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3060 union
3061 {
3062 bfd_signed_vma refcount;
3063 bfd_vma offset;
3064 } got;
3065 };
3066
3067 /* The same for PLT. */
3068 struct plt_entry
3069 {
3070 struct plt_entry *next;
3071
3072 bfd_vma addend;
3073
3074 union
3075 {
3076 bfd_signed_vma refcount;
3077 bfd_vma offset;
3078 } plt;
3079 };
3080
3081 /* Of those relocs that might be copied as dynamic relocs, this macro
3082 selects those that must be copied when linking a shared library,
3083 even when the symbol is local. */
3084
3085 #define MUST_BE_DYN_RELOC(RTYPE) \
3086 ((RTYPE) != R_PPC64_REL32 \
3087 && (RTYPE) != R_PPC64_REL64 \
3088 && (RTYPE) != R_PPC64_REL30)
3089
3090 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3091 copying dynamic variables from a shared lib into an app's dynbss
3092 section, and instead use a dynamic relocation to point into the
3093 shared lib. With code that gcc generates, it's vital that this be
3094 enabled; In the PowerPC64 ABI, the address of a function is actually
3095 the address of a function descriptor, which resides in the .opd
3096 section. gcc uses the descriptor directly rather than going via the
3097 GOT as some other ABI's do, which means that initialized function
3098 pointers must reference the descriptor. Thus, a function pointer
3099 initialized to the address of a function in a shared library will
3100 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3101 redefines the function descriptor symbol to point to the copy. This
3102 presents a problem as a plt entry for that function is also
3103 initialized from the function descriptor symbol and the copy reloc
3104 may not be initialized first. */
3105 #define ELIMINATE_COPY_RELOCS 1
3106
3107 /* Section name for stubs is the associated section name plus this
3108 string. */
3109 #define STUB_SUFFIX ".stub"
3110
3111 /* Linker stubs.
3112 ppc_stub_long_branch:
3113 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3114 destination, but a 24 bit branch in a stub section will reach.
3115 . b dest
3116
3117 ppc_stub_plt_branch:
3118 Similar to the above, but a 24 bit branch in the stub section won't
3119 reach its destination.
3120 . addis %r12,%r2,xxx@toc@ha
3121 . ld %r11,xxx@toc@l(%r12)
3122 . mtctr %r11
3123 . bctr
3124
3125 ppc_stub_plt_call:
3126 Used to call a function in a shared library. If it so happens that
3127 the plt entry referenced crosses a 64k boundary, then an extra
3128 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3129 xxx+16 as appropriate.
3130 . addis %r12,%r2,xxx@toc@ha
3131 . std %r2,40(%r1)
3132 . ld %r11,xxx+0@toc@l(%r12)
3133 . ld %r2,xxx+8@toc@l(%r12)
3134 . mtctr %r11
3135 . ld %r11,xxx+16@toc@l(%r12)
3136 . bctr
3137
3138 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3139 code to adjust the value and save r2 to support multiple toc sections.
3140 A ppc_stub_long_branch with an r2 offset looks like:
3141 . std %r2,40(%r1)
3142 . addis %r2,%r2,off@ha
3143 . addi %r2,%r2,off@l
3144 . b dest
3145
3146 A ppc_stub_plt_branch with an r2 offset looks like:
3147 . std %r2,40(%r1)
3148 . addis %r12,%r2,xxx@toc@ha
3149 . ld %r11,xxx@toc@l(%r12)
3150 . addis %r2,%r2,off@ha
3151 . addi %r2,%r2,off@l
3152 . mtctr %r11
3153 . bctr
3154 */
3155
3156 enum ppc_stub_type {
3157 ppc_stub_none,
3158 ppc_stub_long_branch,
3159 ppc_stub_long_branch_r2off,
3160 ppc_stub_plt_branch,
3161 ppc_stub_plt_branch_r2off,
3162 ppc_stub_plt_call
3163 };
3164
3165 struct ppc_stub_hash_entry {
3166
3167 /* Base hash table entry structure. */
3168 struct bfd_hash_entry root;
3169
3170 enum ppc_stub_type stub_type;
3171
3172 /* The stub section. */
3173 asection *stub_sec;
3174
3175 /* Offset within stub_sec of the beginning of this stub. */
3176 bfd_vma stub_offset;
3177
3178 /* Given the symbol's value and its section we can determine its final
3179 value when building the stubs (so the stub knows where to jump. */
3180 bfd_vma target_value;
3181 asection *target_section;
3182
3183 /* The symbol table entry, if any, that this was derived from. */
3184 struct ppc_link_hash_entry *h;
3185
3186 /* And the reloc addend that this was derived from. */
3187 bfd_vma addend;
3188
3189 /* Where this stub is being called from, or, in the case of combined
3190 stub sections, the first input section in the group. */
3191 asection *id_sec;
3192 };
3193
3194 struct ppc_branch_hash_entry {
3195
3196 /* Base hash table entry structure. */
3197 struct bfd_hash_entry root;
3198
3199 /* Offset within branch lookup table. */
3200 unsigned int offset;
3201
3202 /* Generation marker. */
3203 unsigned int iter;
3204 };
3205
3206 struct ppc_link_hash_entry
3207 {
3208 struct elf_link_hash_entry elf;
3209
3210 /* A pointer to the most recently used stub hash entry against this
3211 symbol. */
3212 struct ppc_stub_hash_entry *stub_cache;
3213
3214 /* Track dynamic relocs copied for this symbol. */
3215 struct ppc_dyn_relocs *dyn_relocs;
3216
3217 /* Link between function code and descriptor symbols. */
3218 struct ppc_link_hash_entry *oh;
3219
3220 /* Flag function code and descriptor symbols. */
3221 unsigned int is_func:1;
3222 unsigned int is_func_descriptor:1;
3223 unsigned int fake:1;
3224
3225 /* Whether global opd/toc sym has been adjusted or not.
3226 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3227 should be set for all globals defined in any opd/toc section. */
3228 unsigned int adjust_done:1;
3229
3230 /* Set if we twiddled this symbol to weak at some stage. */
3231 unsigned int was_undefined:1;
3232
3233 /* Contexts in which symbol is used in the GOT (or TOC).
3234 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3235 corresponding relocs are encountered during check_relocs.
3236 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3237 indicate the corresponding GOT entry type is not needed.
3238 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3239 a TPREL one. We use a separate flag rather than setting TPREL
3240 just for convenience in distinguishing the two cases. */
3241 #define TLS_GD 1 /* GD reloc. */
3242 #define TLS_LD 2 /* LD reloc. */
3243 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3244 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3245 #define TLS_TLS 16 /* Any TLS reloc. */
3246 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3247 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3248 char tls_mask;
3249 };
3250
3251 /* ppc64 ELF linker hash table. */
3252
3253 struct ppc_link_hash_table
3254 {
3255 struct elf_link_hash_table elf;
3256
3257 /* The stub hash table. */
3258 struct bfd_hash_table stub_hash_table;
3259
3260 /* Another hash table for plt_branch stubs. */
3261 struct bfd_hash_table branch_hash_table;
3262
3263 /* Linker stub bfd. */
3264 bfd *stub_bfd;
3265
3266 /* Linker call-backs. */
3267 asection * (*add_stub_section) (const char *, asection *);
3268 void (*layout_sections_again) (void);
3269
3270 /* Array to keep track of which stub sections have been created, and
3271 information on stub grouping. */
3272 struct map_stub {
3273 /* This is the section to which stubs in the group will be attached. */
3274 asection *link_sec;
3275 /* The stub section. */
3276 asection *stub_sec;
3277 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3278 bfd_vma toc_off;
3279 } *stub_group;
3280
3281 /* Temp used when calculating TOC pointers. */
3282 bfd_vma toc_curr;
3283
3284 /* Highest input section id. */
3285 int top_id;
3286
3287 /* Highest output section index. */
3288 int top_index;
3289
3290 /* List of input sections for each output section. */
3291 asection **input_list;
3292
3293 /* Short-cuts to get to dynamic linker sections. */
3294 asection *got;
3295 asection *plt;
3296 asection *relplt;
3297 asection *dynbss;
3298 asection *relbss;
3299 asection *glink;
3300 asection *sfpr;
3301 asection *brlt;
3302 asection *relbrlt;
3303
3304 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3305 struct ppc_link_hash_entry *tls_get_addr;
3306 struct ppc_link_hash_entry *tls_get_addr_fd;
3307
3308 /* Statistics. */
3309 unsigned long stub_count[ppc_stub_plt_call];
3310
3311 /* Number of stubs against global syms. */
3312 unsigned long stub_globals;
3313
3314 /* Set if we should emit symbols for stubs. */
3315 unsigned int emit_stub_syms:1;
3316
3317 /* Support for multiple toc sections. */
3318 unsigned int no_multi_toc:1;
3319 unsigned int multi_toc_needed:1;
3320
3321 /* Set on error. */
3322 unsigned int stub_error:1;
3323
3324 /* Flag set when small branches are detected. Used to
3325 select suitable defaults for the stub group size. */
3326 unsigned int has_14bit_branch:1;
3327
3328 /* Temp used by ppc64_elf_check_directives. */
3329 unsigned int twiddled_syms:1;
3330
3331 /* Incremented every time we size stubs. */
3332 unsigned int stub_iteration;
3333
3334 /* Small local sym to section mapping cache. */
3335 struct sym_sec_cache sym_sec;
3336 };
3337
3338 /* Rename some of the generic section flags to better document how they
3339 are used here. */
3340 #define has_toc_reloc has_gp_reloc
3341 #define makes_toc_func_call need_finalize_relax
3342 #define call_check_in_progress reloc_done
3343
3344 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3345
3346 #define ppc_hash_table(p) \
3347 ((struct ppc_link_hash_table *) ((p)->hash))
3348
3349 #define ppc_stub_hash_lookup(table, string, create, copy) \
3350 ((struct ppc_stub_hash_entry *) \
3351 bfd_hash_lookup ((table), (string), (create), (copy)))
3352
3353 #define ppc_branch_hash_lookup(table, string, create, copy) \
3354 ((struct ppc_branch_hash_entry *) \
3355 bfd_hash_lookup ((table), (string), (create), (copy)))
3356
3357 /* Create an entry in the stub hash table. */
3358
3359 static struct bfd_hash_entry *
3360 stub_hash_newfunc (struct bfd_hash_entry *entry,
3361 struct bfd_hash_table *table,
3362 const char *string)
3363 {
3364 /* Allocate the structure if it has not already been allocated by a
3365 subclass. */
3366 if (entry == NULL)
3367 {
3368 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3369 if (entry == NULL)
3370 return entry;
3371 }
3372
3373 /* Call the allocation method of the superclass. */
3374 entry = bfd_hash_newfunc (entry, table, string);
3375 if (entry != NULL)
3376 {
3377 struct ppc_stub_hash_entry *eh;
3378
3379 /* Initialize the local fields. */
3380 eh = (struct ppc_stub_hash_entry *) entry;
3381 eh->stub_type = ppc_stub_none;
3382 eh->stub_sec = NULL;
3383 eh->stub_offset = 0;
3384 eh->target_value = 0;
3385 eh->target_section = NULL;
3386 eh->h = NULL;
3387 eh->id_sec = NULL;
3388 }
3389
3390 return entry;
3391 }
3392
3393 /* Create an entry in the branch hash table. */
3394
3395 static struct bfd_hash_entry *
3396 branch_hash_newfunc (struct bfd_hash_entry *entry,
3397 struct bfd_hash_table *table,
3398 const char *string)
3399 {
3400 /* Allocate the structure if it has not already been allocated by a
3401 subclass. */
3402 if (entry == NULL)
3403 {
3404 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3405 if (entry == NULL)
3406 return entry;
3407 }
3408
3409 /* Call the allocation method of the superclass. */
3410 entry = bfd_hash_newfunc (entry, table, string);
3411 if (entry != NULL)
3412 {
3413 struct ppc_branch_hash_entry *eh;
3414
3415 /* Initialize the local fields. */
3416 eh = (struct ppc_branch_hash_entry *) entry;
3417 eh->offset = 0;
3418 eh->iter = 0;
3419 }
3420
3421 return entry;
3422 }
3423
3424 /* Create an entry in a ppc64 ELF linker hash table. */
3425
3426 static struct bfd_hash_entry *
3427 link_hash_newfunc (struct bfd_hash_entry *entry,
3428 struct bfd_hash_table *table,
3429 const char *string)
3430 {
3431 /* Allocate the structure if it has not already been allocated by a
3432 subclass. */
3433 if (entry == NULL)
3434 {
3435 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3436 if (entry == NULL)
3437 return entry;
3438 }
3439
3440 /* Call the allocation method of the superclass. */
3441 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3442 if (entry != NULL)
3443 {
3444 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3445
3446 memset (&eh->stub_cache, 0,
3447 (sizeof (struct ppc_link_hash_entry)
3448 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3449 }
3450
3451 return entry;
3452 }
3453
3454 /* Create a ppc64 ELF linker hash table. */
3455
3456 static struct bfd_link_hash_table *
3457 ppc64_elf_link_hash_table_create (bfd *abfd)
3458 {
3459 struct ppc_link_hash_table *htab;
3460 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3461
3462 htab = bfd_zmalloc (amt);
3463 if (htab == NULL)
3464 return NULL;
3465
3466 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3467 {
3468 free (htab);
3469 return NULL;
3470 }
3471
3472 /* Init the stub hash table too. */
3473 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3474 return NULL;
3475
3476 /* And the branch hash table. */
3477 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3478 return NULL;
3479
3480 /* Initializing two fields of the union is just cosmetic. We really
3481 only care about glist, but when compiled on a 32-bit host the
3482 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3483 debugger inspection of these fields look nicer. */
3484 htab->elf.init_got_refcount.refcount = 0;
3485 htab->elf.init_got_refcount.glist = NULL;
3486 htab->elf.init_plt_refcount.refcount = 0;
3487 htab->elf.init_plt_refcount.glist = NULL;
3488 htab->elf.init_got_offset.offset = 0;
3489 htab->elf.init_got_offset.glist = NULL;
3490 htab->elf.init_plt_offset.offset = 0;
3491 htab->elf.init_plt_offset.glist = NULL;
3492
3493 return &htab->elf.root;
3494 }
3495
3496 /* Free the derived linker hash table. */
3497
3498 static void
3499 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3500 {
3501 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3502
3503 bfd_hash_table_free (&ret->stub_hash_table);
3504 bfd_hash_table_free (&ret->branch_hash_table);
3505 _bfd_generic_link_hash_table_free (hash);
3506 }
3507
3508 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3509
3510 void
3511 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3512 {
3513 struct ppc_link_hash_table *htab;
3514
3515 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3516
3517 /* Always hook our dynamic sections into the first bfd, which is the
3518 linker created stub bfd. This ensures that the GOT header is at
3519 the start of the output TOC section. */
3520 htab = ppc_hash_table (info);
3521 htab->stub_bfd = abfd;
3522 htab->elf.dynobj = abfd;
3523 }
3524
3525 /* Build a name for an entry in the stub hash table. */
3526
3527 static char *
3528 ppc_stub_name (const asection *input_section,
3529 const asection *sym_sec,
3530 const struct ppc_link_hash_entry *h,
3531 const Elf_Internal_Rela *rel)
3532 {
3533 char *stub_name;
3534 bfd_size_type len;
3535
3536 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3537 offsets from a sym as a branch target? In fact, we could
3538 probably assume the addend is always zero. */
3539 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3540
3541 if (h)
3542 {
3543 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3544 stub_name = bfd_malloc (len);
3545 if (stub_name == NULL)
3546 return stub_name;
3547
3548 sprintf (stub_name, "%08x.%s+%x",
3549 input_section->id & 0xffffffff,
3550 h->elf.root.root.string,
3551 (int) rel->r_addend & 0xffffffff);
3552 }
3553 else
3554 {
3555 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3556 stub_name = bfd_malloc (len);
3557 if (stub_name == NULL)
3558 return stub_name;
3559
3560 sprintf (stub_name, "%08x.%x:%x+%x",
3561 input_section->id & 0xffffffff,
3562 sym_sec->id & 0xffffffff,
3563 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3564 (int) rel->r_addend & 0xffffffff);
3565 }
3566 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3567 stub_name[len - 2] = 0;
3568 return stub_name;
3569 }
3570
3571 /* Look up an entry in the stub hash. Stub entries are cached because
3572 creating the stub name takes a bit of time. */
3573
3574 static struct ppc_stub_hash_entry *
3575 ppc_get_stub_entry (const asection *input_section,
3576 const asection *sym_sec,
3577 struct ppc_link_hash_entry *h,
3578 const Elf_Internal_Rela *rel,
3579 struct ppc_link_hash_table *htab)
3580 {
3581 struct ppc_stub_hash_entry *stub_entry;
3582 const asection *id_sec;
3583
3584 /* If this input section is part of a group of sections sharing one
3585 stub section, then use the id of the first section in the group.
3586 Stub names need to include a section id, as there may well be
3587 more than one stub used to reach say, printf, and we need to
3588 distinguish between them. */
3589 id_sec = htab->stub_group[input_section->id].link_sec;
3590
3591 if (h != NULL && h->stub_cache != NULL
3592 && h->stub_cache->h == h
3593 && h->stub_cache->id_sec == id_sec)
3594 {
3595 stub_entry = h->stub_cache;
3596 }
3597 else
3598 {
3599 char *stub_name;
3600
3601 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3602 if (stub_name == NULL)
3603 return NULL;
3604
3605 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3606 stub_name, FALSE, FALSE);
3607 if (h != NULL)
3608 h->stub_cache = stub_entry;
3609
3610 free (stub_name);
3611 }
3612
3613 return stub_entry;
3614 }
3615
3616 /* Add a new stub entry to the stub hash. Not all fields of the new
3617 stub entry are initialised. */
3618
3619 static struct ppc_stub_hash_entry *
3620 ppc_add_stub (const char *stub_name,
3621 asection *section,
3622 struct ppc_link_hash_table *htab)
3623 {
3624 asection *link_sec;
3625 asection *stub_sec;
3626 struct ppc_stub_hash_entry *stub_entry;
3627
3628 link_sec = htab->stub_group[section->id].link_sec;
3629 stub_sec = htab->stub_group[section->id].stub_sec;
3630 if (stub_sec == NULL)
3631 {
3632 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3633 if (stub_sec == NULL)
3634 {
3635 size_t namelen;
3636 bfd_size_type len;
3637 char *s_name;
3638
3639 namelen = strlen (link_sec->name);
3640 len = namelen + sizeof (STUB_SUFFIX);
3641 s_name = bfd_alloc (htab->stub_bfd, len);
3642 if (s_name == NULL)
3643 return NULL;
3644
3645 memcpy (s_name, link_sec->name, namelen);
3646 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3647 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3648 if (stub_sec == NULL)
3649 return NULL;
3650 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3651 }
3652 htab->stub_group[section->id].stub_sec = stub_sec;
3653 }
3654
3655 /* Enter this entry into the linker stub hash table. */
3656 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3657 TRUE, FALSE);
3658 if (stub_entry == NULL)
3659 {
3660 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3661 section->owner, stub_name);
3662 return NULL;
3663 }
3664
3665 stub_entry->stub_sec = stub_sec;
3666 stub_entry->stub_offset = 0;
3667 stub_entry->id_sec = link_sec;
3668 return stub_entry;
3669 }
3670
3671 /* Create sections for linker generated code. */
3672
3673 static bfd_boolean
3674 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3675 {
3676 struct ppc_link_hash_table *htab;
3677 flagword flags;
3678
3679 htab = ppc_hash_table (info);
3680
3681 /* Create .sfpr for code to save and restore fp regs. */
3682 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3683 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3684 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3685 flags);
3686 if (htab->sfpr == NULL
3687 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3688 return FALSE;
3689
3690 /* Create .glink for lazy dynamic linking support. */
3691 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3692 flags);
3693 if (htab->glink == NULL
3694 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3695 return FALSE;
3696
3697 /* Create branch lookup table for plt_branch stubs. */
3698 if (info->shared)
3699 {
3700 flags = (SEC_ALLOC | SEC_LOAD
3701 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3702 htab->brlt
3703 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3704 flags);
3705 }
3706 else
3707 {
3708 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3709 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3710 htab->brlt
3711 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3712 }
3713
3714 if (htab->brlt == NULL
3715 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3716 return FALSE;
3717
3718 if (info->shared)
3719 {
3720 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3721 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3722 htab->relbrlt
3723 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3724 flags);
3725 }
3726 else if (info->emitrelocations)
3727 {
3728 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3729 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3730 htab->relbrlt
3731 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3732 flags);
3733 }
3734 else
3735 return TRUE;
3736
3737 if (!htab->relbrlt
3738 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3739 return FALSE;
3740
3741 return TRUE;
3742 }
3743
3744 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3745 not already done. */
3746
3747 static bfd_boolean
3748 create_got_section (bfd *abfd, struct bfd_link_info *info)
3749 {
3750 asection *got, *relgot;
3751 flagword flags;
3752 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3753
3754 if (!htab->got)
3755 {
3756 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3757 return FALSE;
3758
3759 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3760 if (!htab->got)
3761 abort ();
3762 }
3763
3764 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3765 | SEC_LINKER_CREATED);
3766
3767 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3768 if (!got
3769 || !bfd_set_section_alignment (abfd, got, 3))
3770 return FALSE;
3771
3772 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3773 flags | SEC_READONLY);
3774 if (!relgot
3775 || ! bfd_set_section_alignment (abfd, relgot, 3))
3776 return FALSE;
3777
3778 ppc64_elf_tdata (abfd)->got = got;
3779 ppc64_elf_tdata (abfd)->relgot = relgot;
3780 return TRUE;
3781 }
3782
3783 /* Create the dynamic sections, and set up shortcuts. */
3784
3785 static bfd_boolean
3786 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3787 {
3788 struct ppc_link_hash_table *htab;
3789
3790 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3791 return FALSE;
3792
3793 htab = ppc_hash_table (info);
3794 if (!htab->got)
3795 htab->got = bfd_get_section_by_name (dynobj, ".got");
3796 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3797 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3798 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3799 if (!info->shared)
3800 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3801
3802 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3803 || (!info->shared && !htab->relbss))
3804 abort ();
3805
3806 return TRUE;
3807 }
3808
3809 /* Merge PLT info on FROM with that on TO. */
3810
3811 static void
3812 move_plt_plist (struct ppc_link_hash_entry *from,
3813 struct ppc_link_hash_entry *to)
3814 {
3815 if (from->elf.plt.plist != NULL)
3816 {
3817 if (to->elf.plt.plist != NULL)
3818 {
3819 struct plt_entry **entp;
3820 struct plt_entry *ent;
3821
3822 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3823 {
3824 struct plt_entry *dent;
3825
3826 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3827 if (dent->addend == ent->addend)
3828 {
3829 dent->plt.refcount += ent->plt.refcount;
3830 *entp = ent->next;
3831 break;
3832 }
3833 if (dent == NULL)
3834 entp = &ent->next;
3835 }
3836 *entp = to->elf.plt.plist;
3837 }
3838
3839 to->elf.plt.plist = from->elf.plt.plist;
3840 from->elf.plt.plist = NULL;
3841 }
3842 }
3843
3844 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3845
3846 static void
3847 ppc64_elf_copy_indirect_symbol
3848 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3849 struct elf_link_hash_entry *dir,
3850 struct elf_link_hash_entry *ind)
3851 {
3852 struct ppc_link_hash_entry *edir, *eind;
3853
3854 edir = (struct ppc_link_hash_entry *) dir;
3855 eind = (struct ppc_link_hash_entry *) ind;
3856
3857 /* Copy over any dynamic relocs we may have on the indirect sym. */
3858 if (eind->dyn_relocs != NULL)
3859 {
3860 if (edir->dyn_relocs != NULL)
3861 {
3862 struct ppc_dyn_relocs **pp;
3863 struct ppc_dyn_relocs *p;
3864
3865 if (eind->elf.root.type == bfd_link_hash_indirect)
3866 abort ();
3867
3868 /* Add reloc counts against the weak sym to the strong sym
3869 list. Merge any entries against the same section. */
3870 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3871 {
3872 struct ppc_dyn_relocs *q;
3873
3874 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3875 if (q->sec == p->sec)
3876 {
3877 q->pc_count += p->pc_count;
3878 q->count += p->count;
3879 *pp = p->next;
3880 break;
3881 }
3882 if (q == NULL)
3883 pp = &p->next;
3884 }
3885 *pp = edir->dyn_relocs;
3886 }
3887
3888 edir->dyn_relocs = eind->dyn_relocs;
3889 eind->dyn_relocs = NULL;
3890 }
3891
3892 edir->is_func |= eind->is_func;
3893 edir->is_func_descriptor |= eind->is_func_descriptor;
3894 edir->tls_mask |= eind->tls_mask;
3895
3896 /* If called to transfer flags for a weakdef during processing
3897 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3898 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3899 if (!(ELIMINATE_COPY_RELOCS
3900 && eind->elf.root.type != bfd_link_hash_indirect
3901 && edir->elf.dynamic_adjusted))
3902 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3903
3904 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3905 edir->elf.ref_regular |= eind->elf.ref_regular;
3906 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3907 edir->elf.needs_plt |= eind->elf.needs_plt;
3908
3909 /* If we were called to copy over info for a weak sym, that's all. */
3910 if (eind->elf.root.type != bfd_link_hash_indirect)
3911 return;
3912
3913 /* Copy over got entries that we may have already seen to the
3914 symbol which just became indirect. */
3915 if (eind->elf.got.glist != NULL)
3916 {
3917 if (edir->elf.got.glist != NULL)
3918 {
3919 struct got_entry **entp;
3920 struct got_entry *ent;
3921
3922 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3923 {
3924 struct got_entry *dent;
3925
3926 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3927 if (dent->addend == ent->addend
3928 && dent->owner == ent->owner
3929 && dent->tls_type == ent->tls_type)
3930 {
3931 dent->got.refcount += ent->got.refcount;
3932 *entp = ent->next;
3933 break;
3934 }
3935 if (dent == NULL)
3936 entp = &ent->next;
3937 }
3938 *entp = edir->elf.got.glist;
3939 }
3940
3941 edir->elf.got.glist = eind->elf.got.glist;
3942 eind->elf.got.glist = NULL;
3943 }
3944
3945 /* And plt entries. */
3946 move_plt_plist (eind, edir);
3947
3948 if (edir->elf.dynindx == -1)
3949 {
3950 edir->elf.dynindx = eind->elf.dynindx;
3951 edir->elf.dynstr_index = eind->elf.dynstr_index;
3952 eind->elf.dynindx = -1;
3953 eind->elf.dynstr_index = 0;
3954 }
3955 else
3956 BFD_ASSERT (eind->elf.dynindx == -1);
3957 }
3958
3959 /* Find the function descriptor hash entry from the given function code
3960 hash entry FH. Link the entries via their OH fields. */
3961
3962 static struct ppc_link_hash_entry *
3963 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3964 {
3965 struct ppc_link_hash_entry *fdh = fh->oh;
3966
3967 if (fdh == NULL)
3968 {
3969 const char *fd_name = fh->elf.root.root.string + 1;
3970
3971 fdh = (struct ppc_link_hash_entry *)
3972 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3973 if (fdh != NULL)
3974 {
3975 fdh->is_func_descriptor = 1;
3976 fdh->oh = fh;
3977 fh->is_func = 1;
3978 fh->oh = fdh;
3979 }
3980 }
3981
3982 return fdh;
3983 }
3984
3985 /* Make a fake function descriptor sym for the code sym FH. */
3986
3987 static struct ppc_link_hash_entry *
3988 make_fdh (struct bfd_link_info *info,
3989 struct ppc_link_hash_entry *fh)
3990 {
3991 bfd *abfd;
3992 asymbol *newsym;
3993 struct bfd_link_hash_entry *bh;
3994 struct ppc_link_hash_entry *fdh;
3995
3996 abfd = fh->elf.root.u.undef.abfd;
3997 newsym = bfd_make_empty_symbol (abfd);
3998 newsym->name = fh->elf.root.root.string + 1;
3999 newsym->section = bfd_und_section_ptr;
4000 newsym->value = 0;
4001 newsym->flags = BSF_WEAK;
4002
4003 bh = NULL;
4004 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4005 newsym->flags, newsym->section,
4006 newsym->value, NULL, FALSE, FALSE,
4007 &bh))
4008 return NULL;
4009
4010 fdh = (struct ppc_link_hash_entry *) bh;
4011 fdh->elf.non_elf = 0;
4012 fdh->fake = 1;
4013 fdh->is_func_descriptor = 1;
4014 fdh->oh = fh;
4015 fh->is_func = 1;
4016 fh->oh = fdh;
4017 return fdh;
4018 }
4019
4020 /* Hacks to support old ABI code.
4021 When making function calls, old ABI code references function entry
4022 points (dot symbols), while new ABI code references the function
4023 descriptor symbol. We need to make any combination of reference and
4024 definition work together, without breaking archive linking.
4025
4026 For a defined function "foo" and an undefined call to "bar":
4027 An old object defines "foo" and ".foo", references ".bar" (possibly
4028 "bar" too).
4029 A new object defines "foo" and references "bar".
4030
4031 A new object thus has no problem with its undefined symbols being
4032 satisfied by definitions in an old object. On the other hand, the
4033 old object won't have ".bar" satisfied by a new object. */
4034
4035 /* Fix function descriptor symbols defined in .opd sections to be
4036 function type. */
4037
4038 static bfd_boolean
4039 ppc64_elf_add_symbol_hook (bfd *ibfd,
4040 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4041 Elf_Internal_Sym *isym,
4042 const char **name,
4043 flagword *flags ATTRIBUTE_UNUSED,
4044 asection **sec,
4045 bfd_vma *value ATTRIBUTE_UNUSED)
4046 {
4047 if (*sec != NULL
4048 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4049 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4050
4051 if ((*name)[0] == '.'
4052 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4053 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4054 && is_ppc64_elf_target (ibfd->xvec))
4055 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4056
4057 return TRUE;
4058 }
4059
4060 /* This function makes an old ABI object reference to ".bar" cause the
4061 inclusion of a new ABI object archive that defines "bar".
4062 NAME is a symbol defined in an archive. Return a symbol in the hash
4063 table that might be satisfied by the archive symbols. */
4064
4065 static struct elf_link_hash_entry *
4066 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4067 struct bfd_link_info *info,
4068 const char *name)
4069 {
4070 struct elf_link_hash_entry *h;
4071 char *dot_name;
4072 size_t len;
4073
4074 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4075 if (h != NULL
4076 /* Don't return this sym if it is a fake function descriptor
4077 created by add_symbol_adjust. */
4078 && !(h->root.type == bfd_link_hash_undefweak
4079 && ((struct ppc_link_hash_entry *) h)->fake))
4080 return h;
4081
4082 if (name[0] == '.')
4083 return h;
4084
4085 len = strlen (name);
4086 dot_name = bfd_alloc (abfd, len + 2);
4087 if (dot_name == NULL)
4088 return (struct elf_link_hash_entry *) 0 - 1;
4089 dot_name[0] = '.';
4090 memcpy (dot_name + 1, name, len + 1);
4091 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4092 bfd_release (abfd, dot_name);
4093 return h;
4094 }
4095
4096 /* This function satisfies all old ABI object references to ".bar" if a
4097 new ABI object defines "bar". Well, at least, undefined dot symbols
4098 are made weak. This stops later archive searches from including an
4099 object if we already have a function descriptor definition. It also
4100 prevents the linker complaining about undefined symbols.
4101 We also check and correct mismatched symbol visibility here. The
4102 most restrictive visibility of the function descriptor and the
4103 function entry symbol is used. */
4104
4105 struct add_symbol_adjust_data
4106 {
4107 struct bfd_link_info *info;
4108 bfd_boolean ok;
4109 };
4110
4111 static bfd_boolean
4112 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4113 {
4114 struct add_symbol_adjust_data *data;
4115 struct ppc_link_hash_table *htab;
4116 struct ppc_link_hash_entry *eh;
4117 struct ppc_link_hash_entry *fdh;
4118
4119 if (h->root.type == bfd_link_hash_indirect)
4120 return TRUE;
4121
4122 if (h->root.type == bfd_link_hash_warning)
4123 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4124
4125 if (h->root.root.string[0] != '.')
4126 return TRUE;
4127
4128 data = inf;
4129 htab = ppc_hash_table (data->info);
4130 eh = (struct ppc_link_hash_entry *) h;
4131 fdh = get_fdh (eh, htab);
4132 if (fdh == NULL
4133 && !data->info->relocatable
4134 && (eh->elf.root.type == bfd_link_hash_undefined
4135 || eh->elf.root.type == bfd_link_hash_undefweak)
4136 && eh->elf.ref_regular)
4137 {
4138 /* Make an undefweak function descriptor sym, which is enough to
4139 pull in an --as-needed shared lib, but won't cause link
4140 errors. Archives are handled elsewhere. */
4141 fdh = make_fdh (data->info, eh);
4142 if (fdh == NULL)
4143 data->ok = FALSE;
4144 else
4145 fdh->elf.ref_regular = 1;
4146 }
4147 else if (fdh != NULL)
4148 {
4149 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4150 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4151 if (entry_vis < descr_vis)
4152 fdh->elf.other += entry_vis - descr_vis;
4153 else if (entry_vis > descr_vis)
4154 eh->elf.other += descr_vis - entry_vis;
4155
4156 if ((fdh->elf.root.type == bfd_link_hash_defined
4157 || fdh->elf.root.type == bfd_link_hash_defweak)
4158 && eh->elf.root.type == bfd_link_hash_undefined)
4159 {
4160 eh->elf.root.type = bfd_link_hash_undefweak;
4161 eh->was_undefined = 1;
4162 htab->twiddled_syms = 1;
4163 }
4164 }
4165
4166 return TRUE;
4167 }
4168
4169 static bfd_boolean
4170 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4171 {
4172 struct ppc_link_hash_table *htab;
4173 struct add_symbol_adjust_data data;
4174
4175 if (!is_ppc64_elf_target (abfd->xvec))
4176 return TRUE;
4177
4178 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4179 return TRUE;
4180 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4181
4182 htab = ppc_hash_table (info);
4183 if (!is_ppc64_elf_target (htab->elf.root.creator))
4184 return TRUE;
4185
4186 data.info = info;
4187 data.ok = TRUE;
4188 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4189
4190 /* We need to fix the undefs list for any syms we have twiddled to
4191 undef_weak. */
4192 if (htab->twiddled_syms)
4193 {
4194 bfd_link_repair_undef_list (&htab->elf.root);
4195 htab->twiddled_syms = 0;
4196 }
4197 return data.ok;
4198 }
4199
4200 static bfd_boolean
4201 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4202 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4203 {
4204 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4205 char *local_got_tls_masks;
4206
4207 if (local_got_ents == NULL)
4208 {
4209 bfd_size_type size = symtab_hdr->sh_info;
4210
4211 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4212 local_got_ents = bfd_zalloc (abfd, size);
4213 if (local_got_ents == NULL)
4214 return FALSE;
4215 elf_local_got_ents (abfd) = local_got_ents;
4216 }
4217
4218 if ((tls_type & TLS_EXPLICIT) == 0)
4219 {
4220 struct got_entry *ent;
4221
4222 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4223 if (ent->addend == r_addend
4224 && ent->owner == abfd
4225 && ent->tls_type == tls_type)
4226 break;
4227 if (ent == NULL)
4228 {
4229 bfd_size_type amt = sizeof (*ent);
4230 ent = bfd_alloc (abfd, amt);
4231 if (ent == NULL)
4232 return FALSE;
4233 ent->next = local_got_ents[r_symndx];
4234 ent->addend = r_addend;
4235 ent->owner = abfd;
4236 ent->tls_type = tls_type;
4237 ent->got.refcount = 0;
4238 local_got_ents[r_symndx] = ent;
4239 }
4240 ent->got.refcount += 1;
4241 }
4242
4243 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4244 local_got_tls_masks[r_symndx] |= tls_type;
4245 return TRUE;
4246 }
4247
4248 static bfd_boolean
4249 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4250 {
4251 struct plt_entry *ent;
4252
4253 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4254 if (ent->addend == addend)
4255 break;
4256 if (ent == NULL)
4257 {
4258 bfd_size_type amt = sizeof (*ent);
4259 ent = bfd_alloc (abfd, amt);
4260 if (ent == NULL)
4261 return FALSE;
4262 ent->next = eh->elf.plt.plist;
4263 ent->addend = addend;
4264 ent->plt.refcount = 0;
4265 eh->elf.plt.plist = ent;
4266 }
4267 ent->plt.refcount += 1;
4268 eh->elf.needs_plt = 1;
4269 if (eh->elf.root.root.string[0] == '.'
4270 && eh->elf.root.root.string[1] != '\0')
4271 eh->is_func = 1;
4272 return TRUE;
4273 }
4274
4275 /* Look through the relocs for a section during the first phase, and
4276 calculate needed space in the global offset table, procedure
4277 linkage table, and dynamic reloc sections. */
4278
4279 static bfd_boolean
4280 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4281 asection *sec, const Elf_Internal_Rela *relocs)
4282 {
4283 struct ppc_link_hash_table *htab;
4284 Elf_Internal_Shdr *symtab_hdr;
4285 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4286 const Elf_Internal_Rela *rel;
4287 const Elf_Internal_Rela *rel_end;
4288 asection *sreloc;
4289 asection **opd_sym_map;
4290
4291 if (info->relocatable)
4292 return TRUE;
4293
4294 /* Don't do anything special with non-loaded, non-alloced sections.
4295 In particular, any relocs in such sections should not affect GOT
4296 and PLT reference counting (ie. we don't allow them to create GOT
4297 or PLT entries), there's no possibility or desire to optimize TLS
4298 relocs, and there's not much point in propagating relocs to shared
4299 libs that the dynamic linker won't relocate. */
4300 if ((sec->flags & SEC_ALLOC) == 0)
4301 return TRUE;
4302
4303 htab = ppc_hash_table (info);
4304 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4305
4306 sym_hashes = elf_sym_hashes (abfd);
4307 sym_hashes_end = (sym_hashes
4308 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4309 - symtab_hdr->sh_info);
4310
4311 sreloc = NULL;
4312 opd_sym_map = NULL;
4313 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4314 {
4315 /* Garbage collection needs some extra help with .opd sections.
4316 We don't want to necessarily keep everything referenced by
4317 relocs in .opd, as that would keep all functions. Instead,
4318 if we reference an .opd symbol (a function descriptor), we
4319 want to keep the function code symbol's section. This is
4320 easy for global symbols, but for local syms we need to keep
4321 information about the associated function section. Later, if
4322 edit_opd deletes entries, we'll use this array to adjust
4323 local syms in .opd. */
4324 union opd_info {
4325 asection *func_section;
4326 long entry_adjust;
4327 };
4328 bfd_size_type amt;
4329
4330 amt = sec->size * sizeof (union opd_info) / 8;
4331 opd_sym_map = bfd_zalloc (abfd, amt);
4332 if (opd_sym_map == NULL)
4333 return FALSE;
4334 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4335 }
4336
4337 if (htab->sfpr == NULL
4338 && !create_linkage_sections (htab->elf.dynobj, info))
4339 return FALSE;
4340
4341 rel_end = relocs + sec->reloc_count;
4342 for (rel = relocs; rel < rel_end; rel++)
4343 {
4344 unsigned long r_symndx;
4345 struct elf_link_hash_entry *h;
4346 enum elf_ppc64_reloc_type r_type;
4347 int tls_type = 0;
4348
4349 r_symndx = ELF64_R_SYM (rel->r_info);
4350 if (r_symndx < symtab_hdr->sh_info)
4351 h = NULL;
4352 else
4353 {
4354 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4355 while (h->root.type == bfd_link_hash_indirect
4356 || h->root.type == bfd_link_hash_warning)
4357 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4358 }
4359
4360 r_type = ELF64_R_TYPE (rel->r_info);
4361 switch (r_type)
4362 {
4363 case R_PPC64_GOT_TLSLD16:
4364 case R_PPC64_GOT_TLSLD16_LO:
4365 case R_PPC64_GOT_TLSLD16_HI:
4366 case R_PPC64_GOT_TLSLD16_HA:
4367 ppc64_tlsld_got (abfd)->refcount += 1;
4368 tls_type = TLS_TLS | TLS_LD;
4369 goto dogottls;
4370
4371 case R_PPC64_GOT_TLSGD16:
4372 case R_PPC64_GOT_TLSGD16_LO:
4373 case R_PPC64_GOT_TLSGD16_HI:
4374 case R_PPC64_GOT_TLSGD16_HA:
4375 tls_type = TLS_TLS | TLS_GD;
4376 goto dogottls;
4377
4378 case R_PPC64_GOT_TPREL16_DS:
4379 case R_PPC64_GOT_TPREL16_LO_DS:
4380 case R_PPC64_GOT_TPREL16_HI:
4381 case R_PPC64_GOT_TPREL16_HA:
4382 if (info->shared)
4383 info->flags |= DF_STATIC_TLS;
4384 tls_type = TLS_TLS | TLS_TPREL;
4385 goto dogottls;
4386
4387 case R_PPC64_GOT_DTPREL16_DS:
4388 case R_PPC64_GOT_DTPREL16_LO_DS:
4389 case R_PPC64_GOT_DTPREL16_HI:
4390 case R_PPC64_GOT_DTPREL16_HA:
4391 tls_type = TLS_TLS | TLS_DTPREL;
4392 dogottls:
4393 sec->has_tls_reloc = 1;
4394 /* Fall thru */
4395
4396 case R_PPC64_GOT16:
4397 case R_PPC64_GOT16_DS:
4398 case R_PPC64_GOT16_HA:
4399 case R_PPC64_GOT16_HI:
4400 case R_PPC64_GOT16_LO:
4401 case R_PPC64_GOT16_LO_DS:
4402 /* This symbol requires a global offset table entry. */
4403 sec->has_toc_reloc = 1;
4404 if (ppc64_elf_tdata (abfd)->got == NULL
4405 && !create_got_section (abfd, info))
4406 return FALSE;
4407
4408 if (h != NULL)
4409 {
4410 struct ppc_link_hash_entry *eh;
4411 struct got_entry *ent;
4412
4413 eh = (struct ppc_link_hash_entry *) h;
4414 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4415 if (ent->addend == rel->r_addend
4416 && ent->owner == abfd
4417 && ent->tls_type == tls_type)
4418 break;
4419 if (ent == NULL)
4420 {
4421 bfd_size_type amt = sizeof (*ent);
4422 ent = bfd_alloc (abfd, amt);
4423 if (ent == NULL)
4424 return FALSE;
4425 ent->next = eh->elf.got.glist;
4426 ent->addend = rel->r_addend;
4427 ent->owner = abfd;
4428 ent->tls_type = tls_type;
4429 ent->got.refcount = 0;
4430 eh->elf.got.glist = ent;
4431 }
4432 ent->got.refcount += 1;
4433 eh->tls_mask |= tls_type;
4434 }
4435 else
4436 /* This is a global offset table entry for a local symbol. */
4437 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4438 rel->r_addend, tls_type))
4439 return FALSE;
4440 break;
4441
4442 case R_PPC64_PLT16_HA:
4443 case R_PPC64_PLT16_HI:
4444 case R_PPC64_PLT16_LO:
4445 case R_PPC64_PLT32:
4446 case R_PPC64_PLT64:
4447 /* This symbol requires a procedure linkage table entry. We
4448 actually build the entry in adjust_dynamic_symbol,
4449 because this might be a case of linking PIC code without
4450 linking in any dynamic objects, in which case we don't
4451 need to generate a procedure linkage table after all. */
4452 if (h == NULL)
4453 {
4454 /* It does not make sense to have a procedure linkage
4455 table entry for a local symbol. */
4456 bfd_set_error (bfd_error_bad_value);
4457 return FALSE;
4458 }
4459 else
4460 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4461 rel->r_addend))
4462 return FALSE;
4463 break;
4464
4465 /* The following relocations don't need to propagate the
4466 relocation if linking a shared object since they are
4467 section relative. */
4468 case R_PPC64_SECTOFF:
4469 case R_PPC64_SECTOFF_LO:
4470 case R_PPC64_SECTOFF_HI:
4471 case R_PPC64_SECTOFF_HA:
4472 case R_PPC64_SECTOFF_DS:
4473 case R_PPC64_SECTOFF_LO_DS:
4474 case R_PPC64_DTPREL16:
4475 case R_PPC64_DTPREL16_LO:
4476 case R_PPC64_DTPREL16_HI:
4477 case R_PPC64_DTPREL16_HA:
4478 case R_PPC64_DTPREL16_DS:
4479 case R_PPC64_DTPREL16_LO_DS:
4480 case R_PPC64_DTPREL16_HIGHER:
4481 case R_PPC64_DTPREL16_HIGHERA:
4482 case R_PPC64_DTPREL16_HIGHEST:
4483 case R_PPC64_DTPREL16_HIGHESTA:
4484 break;
4485
4486 /* Nor do these. */
4487 case R_PPC64_TOC16:
4488 case R_PPC64_TOC16_LO:
4489 case R_PPC64_TOC16_HI:
4490 case R_PPC64_TOC16_HA:
4491 case R_PPC64_TOC16_DS:
4492 case R_PPC64_TOC16_LO_DS:
4493 sec->has_toc_reloc = 1;
4494 break;
4495
4496 /* This relocation describes the C++ object vtable hierarchy.
4497 Reconstruct it for later use during GC. */
4498 case R_PPC64_GNU_VTINHERIT:
4499 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4500 return FALSE;
4501 break;
4502
4503 /* This relocation describes which C++ vtable entries are actually
4504 used. Record for later use during GC. */
4505 case R_PPC64_GNU_VTENTRY:
4506 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4507 return FALSE;
4508 break;
4509
4510 case R_PPC64_REL14:
4511 case R_PPC64_REL14_BRTAKEN:
4512 case R_PPC64_REL14_BRNTAKEN:
4513 htab->has_14bit_branch = 1;
4514 /* Fall through. */
4515
4516 case R_PPC64_REL24:
4517 if (h != NULL)
4518 {
4519 /* We may need a .plt entry if the function this reloc
4520 refers to is in a shared lib. */
4521 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4522 rel->r_addend))
4523 return FALSE;
4524 if (h == &htab->tls_get_addr->elf
4525 || h == &htab->tls_get_addr_fd->elf)
4526 sec->has_tls_reloc = 1;
4527 else if (htab->tls_get_addr == NULL
4528 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4529 && (h->root.root.string[15] == 0
4530 || h->root.root.string[15] == '@'))
4531 {
4532 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4533 sec->has_tls_reloc = 1;
4534 }
4535 else if (htab->tls_get_addr_fd == NULL
4536 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4537 && (h->root.root.string[14] == 0
4538 || h->root.root.string[14] == '@'))
4539 {
4540 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4541 sec->has_tls_reloc = 1;
4542 }
4543 }
4544 break;
4545
4546 case R_PPC64_TPREL64:
4547 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4548 if (info->shared)
4549 info->flags |= DF_STATIC_TLS;
4550 goto dotlstoc;
4551
4552 case R_PPC64_DTPMOD64:
4553 if (rel + 1 < rel_end
4554 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4555 && rel[1].r_offset == rel->r_offset + 8)
4556 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4557 else
4558 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4559 goto dotlstoc;
4560
4561 case R_PPC64_DTPREL64:
4562 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4563 if (rel != relocs
4564 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4565 && rel[-1].r_offset == rel->r_offset - 8)
4566 /* This is the second reloc of a dtpmod, dtprel pair.
4567 Don't mark with TLS_DTPREL. */
4568 goto dodyn;
4569
4570 dotlstoc:
4571 sec->has_tls_reloc = 1;
4572 if (h != NULL)
4573 {
4574 struct ppc_link_hash_entry *eh;
4575 eh = (struct ppc_link_hash_entry *) h;
4576 eh->tls_mask |= tls_type;
4577 }
4578 else
4579 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4580 rel->r_addend, tls_type))
4581 return FALSE;
4582
4583 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4584 {
4585 /* One extra to simplify get_tls_mask. */
4586 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4587 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4588 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4589 return FALSE;
4590 }
4591 BFD_ASSERT (rel->r_offset % 8 == 0);
4592 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4593
4594 /* Mark the second slot of a GD or LD entry.
4595 -1 to indicate GD and -2 to indicate LD. */
4596 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4597 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4598 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4599 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4600 goto dodyn;
4601
4602 case R_PPC64_TPREL16:
4603 case R_PPC64_TPREL16_LO:
4604 case R_PPC64_TPREL16_HI:
4605 case R_PPC64_TPREL16_HA:
4606 case R_PPC64_TPREL16_DS:
4607 case R_PPC64_TPREL16_LO_DS:
4608 case R_PPC64_TPREL16_HIGHER:
4609 case R_PPC64_TPREL16_HIGHERA:
4610 case R_PPC64_TPREL16_HIGHEST:
4611 case R_PPC64_TPREL16_HIGHESTA:
4612 if (info->shared)
4613 {
4614 info->flags |= DF_STATIC_TLS;
4615 goto dodyn;
4616 }
4617 break;
4618
4619 case R_PPC64_ADDR64:
4620 if (opd_sym_map != NULL
4621 && rel + 1 < rel_end
4622 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4623 {
4624 if (h != NULL)
4625 {
4626 if (h->root.root.string[0] == '.'
4627 && h->root.root.string[1] != 0
4628 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4629 ;
4630 else
4631 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4632 }
4633 else
4634 {
4635 asection *s;
4636
4637 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4638 r_symndx);
4639 if (s == NULL)
4640 return FALSE;
4641 else if (s != sec)
4642 opd_sym_map[rel->r_offset / 8] = s;
4643 }
4644 }
4645 /* Fall through. */
4646
4647 case R_PPC64_REL30:
4648 case R_PPC64_REL32:
4649 case R_PPC64_REL64:
4650 case R_PPC64_ADDR14:
4651 case R_PPC64_ADDR14_BRNTAKEN:
4652 case R_PPC64_ADDR14_BRTAKEN:
4653 case R_PPC64_ADDR16:
4654 case R_PPC64_ADDR16_DS:
4655 case R_PPC64_ADDR16_HA:
4656 case R_PPC64_ADDR16_HI:
4657 case R_PPC64_ADDR16_HIGHER:
4658 case R_PPC64_ADDR16_HIGHERA:
4659 case R_PPC64_ADDR16_HIGHEST:
4660 case R_PPC64_ADDR16_HIGHESTA:
4661 case R_PPC64_ADDR16_LO:
4662 case R_PPC64_ADDR16_LO_DS:
4663 case R_PPC64_ADDR24:
4664 case R_PPC64_ADDR32:
4665 case R_PPC64_UADDR16:
4666 case R_PPC64_UADDR32:
4667 case R_PPC64_UADDR64:
4668 case R_PPC64_TOC:
4669 if (h != NULL && !info->shared)
4670 /* We may need a copy reloc. */
4671 h->non_got_ref = 1;
4672
4673 /* Don't propagate .opd relocs. */
4674 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4675 break;
4676
4677 /* If we are creating a shared library, and this is a reloc
4678 against a global symbol, or a non PC relative reloc
4679 against a local symbol, then we need to copy the reloc
4680 into the shared library. However, if we are linking with
4681 -Bsymbolic, we do not need to copy a reloc against a
4682 global symbol which is defined in an object we are
4683 including in the link (i.e., DEF_REGULAR is set). At
4684 this point we have not seen all the input files, so it is
4685 possible that DEF_REGULAR is not set now but will be set
4686 later (it is never cleared). In case of a weak definition,
4687 DEF_REGULAR may be cleared later by a strong definition in
4688 a shared library. We account for that possibility below by
4689 storing information in the dyn_relocs field of the hash
4690 table entry. A similar situation occurs when creating
4691 shared libraries and symbol visibility changes render the
4692 symbol local.
4693
4694 If on the other hand, we are creating an executable, we
4695 may need to keep relocations for symbols satisfied by a
4696 dynamic library if we manage to avoid copy relocs for the
4697 symbol. */
4698 dodyn:
4699 if ((info->shared
4700 && (MUST_BE_DYN_RELOC (r_type)
4701 || (h != NULL
4702 && (! info->symbolic
4703 || h->root.type == bfd_link_hash_defweak
4704 || !h->def_regular))))
4705 || (ELIMINATE_COPY_RELOCS
4706 && !info->shared
4707 && h != NULL
4708 && (h->root.type == bfd_link_hash_defweak
4709 || !h->def_regular)))
4710 {
4711 struct ppc_dyn_relocs *p;
4712 struct ppc_dyn_relocs **head;
4713
4714 /* We must copy these reloc types into the output file.
4715 Create a reloc section in dynobj and make room for
4716 this reloc. */
4717 if (sreloc == NULL)
4718 {
4719 const char *name;
4720 bfd *dynobj;
4721
4722 name = (bfd_elf_string_from_elf_section
4723 (abfd,
4724 elf_elfheader (abfd)->e_shstrndx,
4725 elf_section_data (sec)->rel_hdr.sh_name));
4726 if (name == NULL)
4727 return FALSE;
4728
4729 if (strncmp (name, ".rela", 5) != 0
4730 || strcmp (bfd_get_section_name (abfd, sec),
4731 name + 5) != 0)
4732 {
4733 (*_bfd_error_handler)
4734 (_("%B: bad relocation section name `%s\'"),
4735 abfd, name);
4736 bfd_set_error (bfd_error_bad_value);
4737 }
4738
4739 dynobj = htab->elf.dynobj;
4740 sreloc = bfd_get_section_by_name (dynobj, name);
4741 if (sreloc == NULL)
4742 {
4743 flagword flags;
4744
4745 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4746 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4747 | SEC_ALLOC | SEC_LOAD);
4748 sreloc = bfd_make_section_with_flags (dynobj,
4749 name,
4750 flags);
4751 if (sreloc == NULL
4752 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4753 return FALSE;
4754 }
4755 elf_section_data (sec)->sreloc = sreloc;
4756 }
4757
4758 /* If this is a global symbol, we count the number of
4759 relocations we need for this symbol. */
4760 if (h != NULL)
4761 {
4762 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4763 }
4764 else
4765 {
4766 /* Track dynamic relocs needed for local syms too.
4767 We really need local syms available to do this
4768 easily. Oh well. */
4769
4770 asection *s;
4771 void *vpp;
4772
4773 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4774 sec, r_symndx);
4775 if (s == NULL)
4776 return FALSE;
4777
4778 vpp = &elf_section_data (s)->local_dynrel;
4779 head = (struct ppc_dyn_relocs **) vpp;
4780 }
4781
4782 p = *head;
4783 if (p == NULL || p->sec != sec)
4784 {
4785 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4786 if (p == NULL)
4787 return FALSE;
4788 p->next = *head;
4789 *head = p;
4790 p->sec = sec;
4791 p->count = 0;
4792 p->pc_count = 0;
4793 }
4794
4795 p->count += 1;
4796 if (!MUST_BE_DYN_RELOC (r_type))
4797 p->pc_count += 1;
4798 }
4799 break;
4800
4801 default:
4802 break;
4803 }
4804 }
4805
4806 return TRUE;
4807 }
4808
4809 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4810 of the code entry point, and its section. */
4811
4812 static bfd_vma
4813 opd_entry_value (asection *opd_sec,
4814 bfd_vma offset,
4815 asection **code_sec,
4816 bfd_vma *code_off)
4817 {
4818 bfd *opd_bfd = opd_sec->owner;
4819 Elf_Internal_Rela *relocs;
4820 Elf_Internal_Rela *lo, *hi, *look;
4821 bfd_vma val;
4822
4823 /* No relocs implies we are linking a --just-symbols object. */
4824 if (opd_sec->reloc_count == 0)
4825 {
4826 bfd_vma val;
4827
4828 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4829 return (bfd_vma) -1;
4830
4831 if (code_sec != NULL)
4832 {
4833 asection *sec, *likely = NULL;
4834 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4835 if (sec->vma <= val
4836 && (sec->flags & SEC_LOAD) != 0
4837 && (sec->flags & SEC_ALLOC) != 0)
4838 likely = sec;
4839 if (likely != NULL)
4840 {
4841 *code_sec = likely;
4842 if (code_off != NULL)
4843 *code_off = val - likely->vma;
4844 }
4845 }
4846 return val;
4847 }
4848
4849 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4850 if (relocs == NULL)
4851 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4852
4853 /* Go find the opd reloc at the sym address. */
4854 lo = relocs;
4855 BFD_ASSERT (lo != NULL);
4856 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4857 val = (bfd_vma) -1;
4858 while (lo < hi)
4859 {
4860 look = lo + (hi - lo) / 2;
4861 if (look->r_offset < offset)
4862 lo = look + 1;
4863 else if (look->r_offset > offset)
4864 hi = look;
4865 else
4866 {
4867 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4868 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4869 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4870 {
4871 unsigned long symndx = ELF64_R_SYM (look->r_info);
4872 asection *sec;
4873
4874 if (symndx < symtab_hdr->sh_info)
4875 {
4876 Elf_Internal_Sym *sym;
4877
4878 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4879 if (sym == NULL)
4880 {
4881 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4882 symtab_hdr->sh_info,
4883 0, NULL, NULL, NULL);
4884 if (sym == NULL)
4885 break;
4886 symtab_hdr->contents = (bfd_byte *) sym;
4887 }
4888
4889 sym += symndx;
4890 val = sym->st_value;
4891 sec = NULL;
4892 if ((sym->st_shndx != SHN_UNDEF
4893 && sym->st_shndx < SHN_LORESERVE)
4894 || sym->st_shndx > SHN_HIRESERVE)
4895 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4896 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4897 }
4898 else
4899 {
4900 struct elf_link_hash_entry **sym_hashes;
4901 struct elf_link_hash_entry *rh;
4902
4903 sym_hashes = elf_sym_hashes (opd_bfd);
4904 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4905 while (rh->root.type == bfd_link_hash_indirect
4906 || rh->root.type == bfd_link_hash_warning)
4907 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4908 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4909 || rh->root.type == bfd_link_hash_defweak);
4910 val = rh->root.u.def.value;
4911 sec = rh->root.u.def.section;
4912 }
4913 val += look->r_addend;
4914 if (code_off != NULL)
4915 *code_off = val;
4916 if (code_sec != NULL)
4917 *code_sec = sec;
4918 if (sec != NULL && sec->output_section != NULL)
4919 val += sec->output_section->vma + sec->output_offset;
4920 }
4921 break;
4922 }
4923 }
4924
4925 return val;
4926 }
4927
4928 /* Return the section that should be marked against GC for a given
4929 relocation. */
4930
4931 static asection *
4932 ppc64_elf_gc_mark_hook (asection *sec,
4933 struct bfd_link_info *info,
4934 Elf_Internal_Rela *rel,
4935 struct elf_link_hash_entry *h,
4936 Elf_Internal_Sym *sym)
4937 {
4938 asection *rsec;
4939
4940 /* First mark all our entry sym sections. */
4941 if (info->gc_sym_list != NULL)
4942 {
4943 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4944 struct bfd_sym_chain *sym = info->gc_sym_list;
4945
4946 info->gc_sym_list = NULL;
4947 do
4948 {
4949 struct ppc_link_hash_entry *eh;
4950
4951 eh = (struct ppc_link_hash_entry *)
4952 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4953 if (eh == NULL)
4954 continue;
4955 if (eh->elf.root.type != bfd_link_hash_defined
4956 && eh->elf.root.type != bfd_link_hash_defweak)
4957 continue;
4958
4959 if (eh->is_func_descriptor
4960 && (eh->oh->elf.root.type == bfd_link_hash_defined
4961 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4962 rsec = eh->oh->elf.root.u.def.section;
4963 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4964 && opd_entry_value (eh->elf.root.u.def.section,
4965 eh->elf.root.u.def.value,
4966 &rsec, NULL) != (bfd_vma) -1)
4967 ;
4968 else
4969 continue;
4970
4971 if (!rsec->gc_mark)
4972 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4973
4974 rsec = eh->elf.root.u.def.section;
4975 if (!rsec->gc_mark)
4976 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4977
4978 sym = sym->next;
4979 }
4980 while (sym != NULL);
4981 }
4982
4983 /* Syms return NULL if we're marking .opd, so we avoid marking all
4984 function sections, as all functions are referenced in .opd. */
4985 rsec = NULL;
4986 if (get_opd_info (sec) != NULL)
4987 return rsec;
4988
4989 if (h != NULL)
4990 {
4991 enum elf_ppc64_reloc_type r_type;
4992 struct ppc_link_hash_entry *eh;
4993
4994 r_type = ELF64_R_TYPE (rel->r_info);
4995 switch (r_type)
4996 {
4997 case R_PPC64_GNU_VTINHERIT:
4998 case R_PPC64_GNU_VTENTRY:
4999 break;
5000
5001 default:
5002 switch (h->root.type)
5003 {
5004 case bfd_link_hash_defined:
5005 case bfd_link_hash_defweak:
5006 eh = (struct ppc_link_hash_entry *) h;
5007 if (eh->oh != NULL
5008 && eh->oh->is_func_descriptor
5009 && (eh->oh->elf.root.type == bfd_link_hash_defined
5010 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5011 eh = eh->oh;
5012
5013 /* Function descriptor syms cause the associated
5014 function code sym section to be marked. */
5015 if (eh->is_func_descriptor
5016 && (eh->oh->elf.root.type == bfd_link_hash_defined
5017 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5018 {
5019 /* They also mark their opd section. */
5020 if (!eh->elf.root.u.def.section->gc_mark)
5021 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5022 ppc64_elf_gc_mark_hook);
5023
5024 rsec = eh->oh->elf.root.u.def.section;
5025 }
5026 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5027 && opd_entry_value (eh->elf.root.u.def.section,
5028 eh->elf.root.u.def.value,
5029 &rsec, NULL) != (bfd_vma) -1)
5030 {
5031 if (!eh->elf.root.u.def.section->gc_mark)
5032 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5033 ppc64_elf_gc_mark_hook);
5034 }
5035 else
5036 rsec = h->root.u.def.section;
5037 break;
5038
5039 case bfd_link_hash_common:
5040 rsec = h->root.u.c.p->section;
5041 break;
5042
5043 default:
5044 break;
5045 }
5046 }
5047 }
5048 else
5049 {
5050 asection **opd_sym_section;
5051
5052 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5053 opd_sym_section = get_opd_info (rsec);
5054 if (opd_sym_section != NULL)
5055 {
5056 if (!rsec->gc_mark)
5057 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5058
5059 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5060 }
5061 }
5062
5063 return rsec;
5064 }
5065
5066 /* Update the .got, .plt. and dynamic reloc reference counts for the
5067 section being removed. */
5068
5069 static bfd_boolean
5070 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5071 asection *sec, const Elf_Internal_Rela *relocs)
5072 {
5073 struct ppc_link_hash_table *htab;
5074 Elf_Internal_Shdr *symtab_hdr;
5075 struct elf_link_hash_entry **sym_hashes;
5076 struct got_entry **local_got_ents;
5077 const Elf_Internal_Rela *rel, *relend;
5078
5079 if ((sec->flags & SEC_ALLOC) == 0)
5080 return TRUE;
5081
5082 elf_section_data (sec)->local_dynrel = NULL;
5083
5084 htab = ppc_hash_table (info);
5085 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5086 sym_hashes = elf_sym_hashes (abfd);
5087 local_got_ents = elf_local_got_ents (abfd);
5088
5089 relend = relocs + sec->reloc_count;
5090 for (rel = relocs; rel < relend; rel++)
5091 {
5092 unsigned long r_symndx;
5093 enum elf_ppc64_reloc_type r_type;
5094 struct elf_link_hash_entry *h = NULL;
5095 char tls_type = 0;
5096
5097 r_symndx = ELF64_R_SYM (rel->r_info);
5098 r_type = ELF64_R_TYPE (rel->r_info);
5099 if (r_symndx >= symtab_hdr->sh_info)
5100 {
5101 struct ppc_link_hash_entry *eh;
5102 struct ppc_dyn_relocs **pp;
5103 struct ppc_dyn_relocs *p;
5104
5105 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5106 while (h->root.type == bfd_link_hash_indirect
5107 || h->root.type == bfd_link_hash_warning)
5108 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5109 eh = (struct ppc_link_hash_entry *) h;
5110
5111 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5112 if (p->sec == sec)
5113 {
5114 /* Everything must go for SEC. */
5115 *pp = p->next;
5116 break;
5117 }
5118 }
5119
5120 switch (r_type)
5121 {
5122 case R_PPC64_GOT_TLSLD16:
5123 case R_PPC64_GOT_TLSLD16_LO:
5124 case R_PPC64_GOT_TLSLD16_HI:
5125 case R_PPC64_GOT_TLSLD16_HA:
5126 ppc64_tlsld_got (abfd)->refcount -= 1;
5127 tls_type = TLS_TLS | TLS_LD;
5128 goto dogot;
5129
5130 case R_PPC64_GOT_TLSGD16:
5131 case R_PPC64_GOT_TLSGD16_LO:
5132 case R_PPC64_GOT_TLSGD16_HI:
5133 case R_PPC64_GOT_TLSGD16_HA:
5134 tls_type = TLS_TLS | TLS_GD;
5135 goto dogot;
5136
5137 case R_PPC64_GOT_TPREL16_DS:
5138 case R_PPC64_GOT_TPREL16_LO_DS:
5139 case R_PPC64_GOT_TPREL16_HI:
5140 case R_PPC64_GOT_TPREL16_HA:
5141 tls_type = TLS_TLS | TLS_TPREL;
5142 goto dogot;
5143
5144 case R_PPC64_GOT_DTPREL16_DS:
5145 case R_PPC64_GOT_DTPREL16_LO_DS:
5146 case R_PPC64_GOT_DTPREL16_HI:
5147 case R_PPC64_GOT_DTPREL16_HA:
5148 tls_type = TLS_TLS | TLS_DTPREL;
5149 goto dogot;
5150
5151 case R_PPC64_GOT16:
5152 case R_PPC64_GOT16_DS:
5153 case R_PPC64_GOT16_HA:
5154 case R_PPC64_GOT16_HI:
5155 case R_PPC64_GOT16_LO:
5156 case R_PPC64_GOT16_LO_DS:
5157 dogot:
5158 {
5159 struct got_entry *ent;
5160
5161 if (h != NULL)
5162 ent = h->got.glist;
5163 else
5164 ent = local_got_ents[r_symndx];
5165
5166 for (; ent != NULL; ent = ent->next)
5167 if (ent->addend == rel->r_addend
5168 && ent->owner == abfd
5169 && ent->tls_type == tls_type)
5170 break;
5171 if (ent == NULL)
5172 abort ();
5173 if (ent->got.refcount > 0)
5174 ent->got.refcount -= 1;
5175 }
5176 break;
5177
5178 case R_PPC64_PLT16_HA:
5179 case R_PPC64_PLT16_HI:
5180 case R_PPC64_PLT16_LO:
5181 case R_PPC64_PLT32:
5182 case R_PPC64_PLT64:
5183 case R_PPC64_REL14:
5184 case R_PPC64_REL14_BRNTAKEN:
5185 case R_PPC64_REL14_BRTAKEN:
5186 case R_PPC64_REL24:
5187 if (h != NULL)
5188 {
5189 struct plt_entry *ent;
5190
5191 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5192 if (ent->addend == rel->r_addend)
5193 break;
5194 if (ent == NULL)
5195 abort ();
5196 if (ent->plt.refcount > 0)
5197 ent->plt.refcount -= 1;
5198 }
5199 break;
5200
5201 default:
5202 break;
5203 }
5204 }
5205 return TRUE;
5206 }
5207
5208 /* The maximum size of .sfpr. */
5209 #define SFPR_MAX (218*4)
5210
5211 struct sfpr_def_parms
5212 {
5213 const char name[12];
5214 unsigned char lo, hi;
5215 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5216 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5217 };
5218
5219 /* Auto-generate _save*, _rest* functions in .sfpr. */
5220
5221 static unsigned int
5222 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5223 {
5224 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5225 unsigned int i;
5226 size_t len = strlen (parm->name);
5227 bfd_boolean writing = FALSE;
5228 char sym[16];
5229
5230 memcpy (sym, parm->name, len);
5231 sym[len + 2] = 0;
5232
5233 for (i = parm->lo; i <= parm->hi; i++)
5234 {
5235 struct elf_link_hash_entry *h;
5236
5237 sym[len + 0] = i / 10 + '0';
5238 sym[len + 1] = i % 10 + '0';
5239 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5240 if (h != NULL
5241 && !h->def_regular)
5242 {
5243 h->root.type = bfd_link_hash_defined;
5244 h->root.u.def.section = htab->sfpr;
5245 h->root.u.def.value = htab->sfpr->size;
5246 h->type = STT_FUNC;
5247 h->def_regular = 1;
5248 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5249 writing = TRUE;
5250 if (htab->sfpr->contents == NULL)
5251 {
5252 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5253 if (htab->sfpr->contents == NULL)
5254 return FALSE;
5255 }
5256 }
5257 if (writing)
5258 {
5259 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5260 if (i != parm->hi)
5261 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5262 else
5263 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5264 htab->sfpr->size = p - htab->sfpr->contents;
5265 }
5266 }
5267
5268 return TRUE;
5269 }
5270
5271 static bfd_byte *
5272 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5273 {
5274 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5275 return p + 4;
5276 }
5277
5278 static bfd_byte *
5279 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5280 {
5281 p = savegpr0 (abfd, p, r);
5282 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5283 p = p + 4;
5284 bfd_put_32 (abfd, BLR, p);
5285 return p + 4;
5286 }
5287
5288 static bfd_byte *
5289 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5290 {
5291 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5292 return p + 4;
5293 }
5294
5295 static bfd_byte *
5296 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5297 {
5298 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5299 p = p + 4;
5300 p = restgpr0 (abfd, p, r);
5301 bfd_put_32 (abfd, MTLR_R0, p);
5302 p = p + 4;
5303 if (r == 29)
5304 {
5305 p = restgpr0 (abfd, p, 30);
5306 p = restgpr0 (abfd, p, 31);
5307 }
5308 bfd_put_32 (abfd, BLR, p);
5309 return p + 4;
5310 }
5311
5312 static bfd_byte *
5313 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5314 {
5315 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5316 return p + 4;
5317 }
5318
5319 static bfd_byte *
5320 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5321 {
5322 p = savegpr1 (abfd, p, r);
5323 bfd_put_32 (abfd, BLR, p);
5324 return p + 4;
5325 }
5326
5327 static bfd_byte *
5328 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5329 {
5330 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5331 return p + 4;
5332 }
5333
5334 static bfd_byte *
5335 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5336 {
5337 p = restgpr1 (abfd, p, r);
5338 bfd_put_32 (abfd, BLR, p);
5339 return p + 4;
5340 }
5341
5342 static bfd_byte *
5343 savefpr (bfd *abfd, bfd_byte *p, int r)
5344 {
5345 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5346 return p + 4;
5347 }
5348
5349 static bfd_byte *
5350 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5351 {
5352 p = savefpr (abfd, p, r);
5353 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5354 p = p + 4;
5355 bfd_put_32 (abfd, BLR, p);
5356 return p + 4;
5357 }
5358
5359 static bfd_byte *
5360 restfpr (bfd *abfd, bfd_byte *p, int r)
5361 {
5362 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5363 return p + 4;
5364 }
5365
5366 static bfd_byte *
5367 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5368 {
5369 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5370 p = p + 4;
5371 p = restfpr (abfd, p, r);
5372 bfd_put_32 (abfd, MTLR_R0, p);
5373 p = p + 4;
5374 if (r == 29)
5375 {
5376 p = restfpr (abfd, p, 30);
5377 p = restfpr (abfd, p, 31);
5378 }
5379 bfd_put_32 (abfd, BLR, p);
5380 return p + 4;
5381 }
5382
5383 static bfd_byte *
5384 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5385 {
5386 p = savefpr (abfd, p, r);
5387 bfd_put_32 (abfd, BLR, p);
5388 return p + 4;
5389 }
5390
5391 static bfd_byte *
5392 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5393 {
5394 p = restfpr (abfd, p, r);
5395 bfd_put_32 (abfd, BLR, p);
5396 return p + 4;
5397 }
5398
5399 static bfd_byte *
5400 savevr (bfd *abfd, bfd_byte *p, int r)
5401 {
5402 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5403 p = p + 4;
5404 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5405 return p + 4;
5406 }
5407
5408 static bfd_byte *
5409 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5410 {
5411 p = savevr (abfd, p, r);
5412 bfd_put_32 (abfd, BLR, p);
5413 return p + 4;
5414 }
5415
5416 static bfd_byte *
5417 restvr (bfd *abfd, bfd_byte *p, int r)
5418 {
5419 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5420 p = p + 4;
5421 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5422 return p + 4;
5423 }
5424
5425 static bfd_byte *
5426 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5427 {
5428 p = restvr (abfd, p, r);
5429 bfd_put_32 (abfd, BLR, p);
5430 return p + 4;
5431 }
5432
5433 /* Called via elf_link_hash_traverse to transfer dynamic linking
5434 information on function code symbol entries to their corresponding
5435 function descriptor symbol entries. */
5436
5437 static bfd_boolean
5438 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5439 {
5440 struct bfd_link_info *info;
5441 struct ppc_link_hash_table *htab;
5442 struct plt_entry *ent;
5443 struct ppc_link_hash_entry *fh;
5444 struct ppc_link_hash_entry *fdh;
5445 bfd_boolean force_local;
5446
5447 fh = (struct ppc_link_hash_entry *) h;
5448 if (fh->elf.root.type == bfd_link_hash_indirect)
5449 return TRUE;
5450
5451 if (fh->elf.root.type == bfd_link_hash_warning)
5452 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5453
5454 info = inf;
5455 htab = ppc_hash_table (info);
5456
5457 /* Resolve undefined references to dot-symbols as the value
5458 in the function descriptor, if we have one in a regular object.
5459 This is to satisfy cases like ".quad .foo". Calls to functions
5460 in dynamic objects are handled elsewhere. */
5461 if (fh->elf.root.type == bfd_link_hash_undefweak
5462 && fh->was_undefined
5463 && (fh->oh->elf.root.type == bfd_link_hash_defined
5464 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5465 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5466 && opd_entry_value (fh->oh->elf.root.u.def.section,
5467 fh->oh->elf.root.u.def.value,
5468 &fh->elf.root.u.def.section,
5469 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5470 {
5471 fh->elf.root.type = fh->oh->elf.root.type;
5472 fh->elf.forced_local = 1;
5473 }
5474
5475 /* If this is a function code symbol, transfer dynamic linking
5476 information to the function descriptor symbol. */
5477 if (!fh->is_func)
5478 return TRUE;
5479
5480 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5481 if (ent->plt.refcount > 0)
5482 break;
5483 if (ent == NULL
5484 || fh->elf.root.root.string[0] != '.'
5485 || fh->elf.root.root.string[1] == '\0')
5486 return TRUE;
5487
5488 /* Find the corresponding function descriptor symbol. Create it
5489 as undefined if necessary. */
5490
5491 fdh = get_fdh (fh, htab);
5492 if (fdh != NULL)
5493 while (fdh->elf.root.type == bfd_link_hash_indirect
5494 || fdh->elf.root.type == bfd_link_hash_warning)
5495 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5496
5497 if (fdh == NULL
5498 && info->shared
5499 && (fh->elf.root.type == bfd_link_hash_undefined
5500 || fh->elf.root.type == bfd_link_hash_undefweak))
5501 {
5502 fdh = make_fdh (info, fh);
5503 if (fdh == NULL)
5504 return FALSE;
5505 }
5506
5507 /* Fake function descriptors are made undefweak. If the function
5508 code symbol is strong undefined, make the fake sym the same.
5509 If the function code symbol is defined, then force the fake
5510 descriptor local; We can't support overriding of symbols in a
5511 shared library on a fake descriptor. */
5512
5513 if (fdh != NULL
5514 && fdh->fake
5515 && fdh->elf.root.type == bfd_link_hash_undefweak)
5516 {
5517 if (fh->elf.root.type == bfd_link_hash_undefined)
5518 {
5519 fdh->elf.root.type = bfd_link_hash_undefined;
5520 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5521 }
5522 else if (fh->elf.root.type == bfd_link_hash_defined
5523 || fh->elf.root.type == bfd_link_hash_defweak)
5524 {
5525 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5526 }
5527 }
5528
5529 if (fdh != NULL
5530 && !fdh->elf.forced_local
5531 && (info->shared
5532 || fdh->elf.def_dynamic
5533 || fdh->elf.ref_dynamic
5534 || (fdh->elf.root.type == bfd_link_hash_undefweak
5535 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5536 {
5537 if (fdh->elf.dynindx == -1)
5538 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5539 return FALSE;
5540 fdh->elf.ref_regular |= fh->elf.ref_regular;
5541 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5542 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5543 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5544 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5545 {
5546 move_plt_plist (fh, fdh);
5547 fdh->elf.needs_plt = 1;
5548 }
5549 fdh->is_func_descriptor = 1;
5550 fdh->oh = fh;
5551 fh->oh = fdh;
5552 }
5553
5554 /* Now that the info is on the function descriptor, clear the
5555 function code sym info. Any function code syms for which we
5556 don't have a definition in a regular file, we force local.
5557 This prevents a shared library from exporting syms that have
5558 been imported from another library. Function code syms that
5559 are really in the library we must leave global to prevent the
5560 linker dragging in a definition from a static library. */
5561 force_local = (!fh->elf.def_regular
5562 || fdh == NULL
5563 || !fdh->elf.def_regular
5564 || fdh->elf.forced_local);
5565 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5566
5567 return TRUE;
5568 }
5569
5570 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5571 this hook to a) provide some gcc support functions, and b) transfer
5572 dynamic linking information gathered so far on function code symbol
5573 entries, to their corresponding function descriptor symbol entries. */
5574
5575 static bfd_boolean
5576 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5577 struct bfd_link_info *info)
5578 {
5579 struct ppc_link_hash_table *htab;
5580 unsigned int i;
5581 const struct sfpr_def_parms funcs[] =
5582 {
5583 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5584 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5585 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5586 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5587 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5588 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5589 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5590 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5591 { "._savef", 14, 31, savefpr, savefpr1_tail },
5592 { "._restf", 14, 31, restfpr, restfpr1_tail },
5593 { "_savevr_", 20, 31, savevr, savevr_tail },
5594 { "_restvr_", 20, 31, restvr, restvr_tail }
5595 };
5596
5597 htab = ppc_hash_table (info);
5598 if (htab->sfpr == NULL)
5599 /* We don't have any relocs. */
5600 return TRUE;
5601
5602 /* Provide any missing _save* and _rest* functions. */
5603 htab->sfpr->size = 0;
5604 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5605 if (!sfpr_define (info, &funcs[i]))
5606 return FALSE;
5607
5608 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5609
5610 if (htab->sfpr->size == 0)
5611 htab->sfpr->flags |= SEC_EXCLUDE;
5612
5613 return TRUE;
5614 }
5615
5616 /* Adjust a symbol defined by a dynamic object and referenced by a
5617 regular object. The current definition is in some section of the
5618 dynamic object, but we're not including those sections. We have to
5619 change the definition to something the rest of the link can
5620 understand. */
5621
5622 static bfd_boolean
5623 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5624 struct elf_link_hash_entry *h)
5625 {
5626 struct ppc_link_hash_table *htab;
5627 asection *s;
5628 unsigned int power_of_two;
5629
5630 htab = ppc_hash_table (info);
5631
5632 /* Deal with function syms. */
5633 if (h->type == STT_FUNC
5634 || h->needs_plt)
5635 {
5636 /* Clear procedure linkage table information for any symbol that
5637 won't need a .plt entry. */
5638 struct plt_entry *ent;
5639 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5640 if (ent->plt.refcount > 0)
5641 break;
5642 if (ent == NULL
5643 || SYMBOL_CALLS_LOCAL (info, h)
5644 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5645 && h->root.type == bfd_link_hash_undefweak))
5646 {
5647 h->plt.plist = NULL;
5648 h->needs_plt = 0;
5649 }
5650 }
5651 else
5652 h->plt.plist = NULL;
5653
5654 /* If this is a weak symbol, and there is a real definition, the
5655 processor independent code will have arranged for us to see the
5656 real definition first, and we can just use the same value. */
5657 if (h->u.weakdef != NULL)
5658 {
5659 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5660 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5661 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5662 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5663 if (ELIMINATE_COPY_RELOCS)
5664 h->non_got_ref = h->u.weakdef->non_got_ref;
5665 return TRUE;
5666 }
5667
5668 /* If we are creating a shared library, we must presume that the
5669 only references to the symbol are via the global offset table.
5670 For such cases we need not do anything here; the relocations will
5671 be handled correctly by relocate_section. */
5672 if (info->shared)
5673 return TRUE;
5674
5675 /* If there are no references to this symbol that do not use the
5676 GOT, we don't need to generate a copy reloc. */
5677 if (!h->non_got_ref)
5678 return TRUE;
5679
5680 if (ELIMINATE_COPY_RELOCS)
5681 {
5682 struct ppc_link_hash_entry * eh;
5683 struct ppc_dyn_relocs *p;
5684
5685 eh = (struct ppc_link_hash_entry *) h;
5686 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5687 {
5688 s = p->sec->output_section;
5689 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5690 break;
5691 }
5692
5693 /* If we didn't find any dynamic relocs in read-only sections, then
5694 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5695 if (p == NULL)
5696 {
5697 h->non_got_ref = 0;
5698 return TRUE;
5699 }
5700 }
5701
5702 if (h->plt.plist != NULL)
5703 {
5704 /* We should never get here, but unfortunately there are versions
5705 of gcc out there that improperly (for this ABI) put initialized
5706 function pointers, vtable refs and suchlike in read-only
5707 sections. Allow them to proceed, but warn that this might
5708 break at runtime. */
5709 (*_bfd_error_handler)
5710 (_("copy reloc against `%s' requires lazy plt linking; "
5711 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5712 h->root.root.string);
5713 }
5714
5715 /* This is a reference to a symbol defined by a dynamic object which
5716 is not a function. */
5717
5718 if (h->size == 0)
5719 {
5720 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5721 h->root.root.string);
5722 return TRUE;
5723 }
5724
5725 /* We must allocate the symbol in our .dynbss section, which will
5726 become part of the .bss section of the executable. There will be
5727 an entry for this symbol in the .dynsym section. The dynamic
5728 object will contain position independent code, so all references
5729 from the dynamic object to this symbol will go through the global
5730 offset table. The dynamic linker will use the .dynsym entry to
5731 determine the address it must put in the global offset table, so
5732 both the dynamic object and the regular object will refer to the
5733 same memory location for the variable. */
5734
5735 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5736 to copy the initial value out of the dynamic object and into the
5737 runtime process image. We need to remember the offset into the
5738 .rela.bss section we are going to use. */
5739 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5740 {
5741 htab->relbss->size += sizeof (Elf64_External_Rela);
5742 h->needs_copy = 1;
5743 }
5744
5745 /* We need to figure out the alignment required for this symbol. I
5746 have no idea how ELF linkers handle this. */
5747 power_of_two = bfd_log2 (h->size);
5748 if (power_of_two > 4)
5749 power_of_two = 4;
5750
5751 /* Apply the required alignment. */
5752 s = htab->dynbss;
5753 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5754 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5755 {
5756 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5757 return FALSE;
5758 }
5759
5760 /* Define the symbol as being at this point in the section. */
5761 h->root.u.def.section = s;
5762 h->root.u.def.value = s->size;
5763
5764 /* Increment the section size to make room for the symbol. */
5765 s->size += h->size;
5766
5767 return TRUE;
5768 }
5769
5770 /* If given a function descriptor symbol, hide both the function code
5771 sym and the descriptor. */
5772 static void
5773 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5774 struct elf_link_hash_entry *h,
5775 bfd_boolean force_local)
5776 {
5777 struct ppc_link_hash_entry *eh;
5778 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5779
5780 eh = (struct ppc_link_hash_entry *) h;
5781 if (eh->is_func_descriptor)
5782 {
5783 struct ppc_link_hash_entry *fh = eh->oh;
5784
5785 if (fh == NULL)
5786 {
5787 const char *p, *q;
5788 struct ppc_link_hash_table *htab;
5789 char save;
5790
5791 /* We aren't supposed to use alloca in BFD because on
5792 systems which do not have alloca the version in libiberty
5793 calls xmalloc, which might cause the program to crash
5794 when it runs out of memory. This function doesn't have a
5795 return status, so there's no way to gracefully return an
5796 error. So cheat. We know that string[-1] can be safely
5797 accessed; It's either a string in an ELF string table,
5798 or allocated in an objalloc structure. */
5799
5800 p = eh->elf.root.root.string - 1;
5801 save = *p;
5802 *(char *) p = '.';
5803 htab = ppc_hash_table (info);
5804 fh = (struct ppc_link_hash_entry *)
5805 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5806 *(char *) p = save;
5807
5808 /* Unfortunately, if it so happens that the string we were
5809 looking for was allocated immediately before this string,
5810 then we overwrote the string terminator. That's the only
5811 reason the lookup should fail. */
5812 if (fh == NULL)
5813 {
5814 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5815 while (q >= eh->elf.root.root.string && *q == *p)
5816 --q, --p;
5817 if (q < eh->elf.root.root.string && *p == '.')
5818 fh = (struct ppc_link_hash_entry *)
5819 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5820 }
5821 if (fh != NULL)
5822 {
5823 eh->oh = fh;
5824 fh->oh = eh;
5825 }
5826 }
5827 if (fh != NULL)
5828 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5829 }
5830 }
5831
5832 static bfd_boolean
5833 get_sym_h (struct elf_link_hash_entry **hp,
5834 Elf_Internal_Sym **symp,
5835 asection **symsecp,
5836 char **tls_maskp,
5837 Elf_Internal_Sym **locsymsp,
5838 unsigned long r_symndx,
5839 bfd *ibfd)
5840 {
5841 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5842
5843 if (r_symndx >= symtab_hdr->sh_info)
5844 {
5845 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5846 struct elf_link_hash_entry *h;
5847
5848 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5849 while (h->root.type == bfd_link_hash_indirect
5850 || h->root.type == bfd_link_hash_warning)
5851 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5852
5853 if (hp != NULL)
5854 *hp = h;
5855
5856 if (symp != NULL)
5857 *symp = NULL;
5858
5859 if (symsecp != NULL)
5860 {
5861 asection *symsec = NULL;
5862 if (h->root.type == bfd_link_hash_defined
5863 || h->root.type == bfd_link_hash_defweak)
5864 symsec = h->root.u.def.section;
5865 *symsecp = symsec;
5866 }
5867
5868 if (tls_maskp != NULL)
5869 {
5870 struct ppc_link_hash_entry *eh;
5871
5872 eh = (struct ppc_link_hash_entry *) h;
5873 *tls_maskp = &eh->tls_mask;
5874 }
5875 }
5876 else
5877 {
5878 Elf_Internal_Sym *sym;
5879 Elf_Internal_Sym *locsyms = *locsymsp;
5880
5881 if (locsyms == NULL)
5882 {
5883 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5884 if (locsyms == NULL)
5885 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5886 symtab_hdr->sh_info,
5887 0, NULL, NULL, NULL);
5888 if (locsyms == NULL)
5889 return FALSE;
5890 *locsymsp = locsyms;
5891 }
5892 sym = locsyms + r_symndx;
5893
5894 if (hp != NULL)
5895 *hp = NULL;
5896
5897 if (symp != NULL)
5898 *symp = sym;
5899
5900 if (symsecp != NULL)
5901 {
5902 asection *symsec = NULL;
5903 if ((sym->st_shndx != SHN_UNDEF
5904 && sym->st_shndx < SHN_LORESERVE)
5905 || sym->st_shndx > SHN_HIRESERVE)
5906 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5907 *symsecp = symsec;
5908 }
5909
5910 if (tls_maskp != NULL)
5911 {
5912 struct got_entry **lgot_ents;
5913 char *tls_mask;
5914
5915 tls_mask = NULL;
5916 lgot_ents = elf_local_got_ents (ibfd);
5917 if (lgot_ents != NULL)
5918 {
5919 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5920 tls_mask = &lgot_masks[r_symndx];
5921 }
5922 *tls_maskp = tls_mask;
5923 }
5924 }
5925 return TRUE;
5926 }
5927
5928 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5929 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5930 type suitable for optimization, and 1 otherwise. */
5931
5932 static int
5933 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5934 Elf_Internal_Sym **locsymsp,
5935 const Elf_Internal_Rela *rel, bfd *ibfd)
5936 {
5937 unsigned long r_symndx;
5938 int next_r;
5939 struct elf_link_hash_entry *h;
5940 Elf_Internal_Sym *sym;
5941 asection *sec;
5942 bfd_vma off;
5943
5944 r_symndx = ELF64_R_SYM (rel->r_info);
5945 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5946 return 0;
5947
5948 if ((*tls_maskp != NULL && **tls_maskp != 0)
5949 || sec == NULL
5950 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5951 return 1;
5952
5953 /* Look inside a TOC section too. */
5954 if (h != NULL)
5955 {
5956 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5957 off = h->root.u.def.value;
5958 }
5959 else
5960 off = sym->st_value;
5961 off += rel->r_addend;
5962 BFD_ASSERT (off % 8 == 0);
5963 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5964 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5965 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5966 return 0;
5967 if (toc_symndx != NULL)
5968 *toc_symndx = r_symndx;
5969 if ((h == NULL
5970 || ((h->root.type == bfd_link_hash_defined
5971 || h->root.type == bfd_link_hash_defweak)
5972 && !h->def_dynamic))
5973 && (next_r == -1 || next_r == -2))
5974 return 1 - next_r;
5975 return 1;
5976 }
5977
5978 /* Adjust all global syms defined in opd sections. In gcc generated
5979 code for the old ABI, these will already have been done. */
5980
5981 static bfd_boolean
5982 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5983 {
5984 struct ppc_link_hash_entry *eh;
5985 asection *sym_sec;
5986 long *opd_adjust;
5987
5988 if (h->root.type == bfd_link_hash_indirect)
5989 return TRUE;
5990
5991 if (h->root.type == bfd_link_hash_warning)
5992 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5993
5994 if (h->root.type != bfd_link_hash_defined
5995 && h->root.type != bfd_link_hash_defweak)
5996 return TRUE;
5997
5998 eh = (struct ppc_link_hash_entry *) h;
5999 if (eh->adjust_done)
6000 return TRUE;
6001
6002 sym_sec = eh->elf.root.u.def.section;
6003 opd_adjust = get_opd_info (sym_sec);
6004 if (opd_adjust != NULL)
6005 {
6006 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6007 if (adjust == -1)
6008 {
6009 /* This entry has been deleted. */
6010 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6011 if (dsec == NULL)
6012 {
6013 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6014 if (elf_discarded_section (dsec))
6015 {
6016 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6017 break;
6018 }
6019 }
6020 eh->elf.root.u.def.value = 0;
6021 eh->elf.root.u.def.section = dsec;
6022 }
6023 else
6024 eh->elf.root.u.def.value += adjust;
6025 eh->adjust_done = 1;
6026 }
6027 return TRUE;
6028 }
6029
6030 /* Handles decrementing dynamic reloc counts for the reloc specified by
6031 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6032 have already been determined. */
6033
6034 static bfd_boolean
6035 dec_dynrel_count (bfd_vma r_info,
6036 asection *sec,
6037 struct bfd_link_info *info,
6038 Elf_Internal_Sym **local_syms,
6039 struct elf_link_hash_entry *h,
6040 asection *sym_sec)
6041 {
6042 enum elf_ppc64_reloc_type r_type;
6043 struct ppc_dyn_relocs *p;
6044 struct ppc_dyn_relocs **pp;
6045
6046 /* Can this reloc be dynamic? This switch, and later tests here
6047 should be kept in sync with the code in check_relocs. */
6048 r_type = ELF64_R_TYPE (r_info);
6049 switch (r_type)
6050 {
6051 default:
6052 return TRUE;
6053
6054 case R_PPC64_TPREL16:
6055 case R_PPC64_TPREL16_LO:
6056 case R_PPC64_TPREL16_HI:
6057 case R_PPC64_TPREL16_HA:
6058 case R_PPC64_TPREL16_DS:
6059 case R_PPC64_TPREL16_LO_DS:
6060 case R_PPC64_TPREL16_HIGHER:
6061 case R_PPC64_TPREL16_HIGHERA:
6062 case R_PPC64_TPREL16_HIGHEST:
6063 case R_PPC64_TPREL16_HIGHESTA:
6064 if (!info->shared)
6065 return TRUE;
6066
6067 case R_PPC64_TPREL64:
6068 case R_PPC64_DTPMOD64:
6069 case R_PPC64_DTPREL64:
6070 case R_PPC64_ADDR64:
6071 case R_PPC64_REL30:
6072 case R_PPC64_REL32:
6073 case R_PPC64_REL64:
6074 case R_PPC64_ADDR14:
6075 case R_PPC64_ADDR14_BRNTAKEN:
6076 case R_PPC64_ADDR14_BRTAKEN:
6077 case R_PPC64_ADDR16:
6078 case R_PPC64_ADDR16_DS:
6079 case R_PPC64_ADDR16_HA:
6080 case R_PPC64_ADDR16_HI:
6081 case R_PPC64_ADDR16_HIGHER:
6082 case R_PPC64_ADDR16_HIGHERA:
6083 case R_PPC64_ADDR16_HIGHEST:
6084 case R_PPC64_ADDR16_HIGHESTA:
6085 case R_PPC64_ADDR16_LO:
6086 case R_PPC64_ADDR16_LO_DS:
6087 case R_PPC64_ADDR24:
6088 case R_PPC64_ADDR32:
6089 case R_PPC64_UADDR16:
6090 case R_PPC64_UADDR32:
6091 case R_PPC64_UADDR64:
6092 case R_PPC64_TOC:
6093 break;
6094 }
6095
6096 if (local_syms != NULL)
6097 {
6098 unsigned long r_symndx;
6099 Elf_Internal_Sym *sym;
6100 bfd *ibfd = sec->owner;
6101
6102 r_symndx = ELF64_R_SYM (r_info);
6103 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6104 return FALSE;
6105 }
6106
6107 if ((info->shared
6108 && (MUST_BE_DYN_RELOC (r_type)
6109 || (h != NULL
6110 && (!info->symbolic
6111 || h->root.type == bfd_link_hash_defweak
6112 || !h->def_regular))))
6113 || (ELIMINATE_COPY_RELOCS
6114 && !info->shared
6115 && h != NULL
6116 && (h->root.type == bfd_link_hash_defweak
6117 || !h->def_regular)))
6118 ;
6119 else
6120 return TRUE;
6121
6122 if (h != NULL)
6123 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6124 else
6125 {
6126 if (sym_sec != NULL)
6127 {
6128 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6129 pp = (struct ppc_dyn_relocs **) vpp;
6130 }
6131 else
6132 {
6133 void *vpp = &elf_section_data (sec)->local_dynrel;
6134 pp = (struct ppc_dyn_relocs **) vpp;
6135 }
6136
6137 /* elf_gc_sweep may have already removed all dyn relocs associated
6138 with local syms for a given section. Don't report a dynreloc
6139 miscount. */
6140 if (*pp == NULL)
6141 return TRUE;
6142 }
6143
6144 while ((p = *pp) != NULL)
6145 {
6146 if (p->sec == sec)
6147 {
6148 if (!MUST_BE_DYN_RELOC (r_type))
6149 p->pc_count -= 1;
6150 p->count -= 1;
6151 if (p->count == 0)
6152 *pp = p->next;
6153 return TRUE;
6154 }
6155 pp = &p->next;
6156 }
6157
6158 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6159 sec->owner, sec);
6160 bfd_set_error (bfd_error_bad_value);
6161 return FALSE;
6162 }
6163
6164 /* Remove unused Official Procedure Descriptor entries. Currently we
6165 only remove those associated with functions in discarded link-once
6166 sections, or weakly defined functions that have been overridden. It
6167 would be possible to remove many more entries for statically linked
6168 applications. */
6169
6170 bfd_boolean
6171 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6172 bfd_boolean no_opd_opt,
6173 bfd_boolean non_overlapping)
6174 {
6175 bfd *ibfd;
6176 bfd_boolean some_edited = FALSE;
6177 asection *need_pad = NULL;
6178
6179 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6180 {
6181 asection *sec;
6182 Elf_Internal_Rela *relstart, *rel, *relend;
6183 Elf_Internal_Shdr *symtab_hdr;
6184 Elf_Internal_Sym *local_syms;
6185 struct elf_link_hash_entry **sym_hashes;
6186 bfd_vma offset;
6187 bfd_size_type amt;
6188 long *opd_adjust;
6189 bfd_boolean need_edit, add_aux_fields;
6190 bfd_size_type cnt_16b = 0;
6191
6192 sec = bfd_get_section_by_name (ibfd, ".opd");
6193 if (sec == NULL || sec->size == 0)
6194 continue;
6195
6196 amt = sec->size * sizeof (long) / 8;
6197 opd_adjust = get_opd_info (sec);
6198 if (opd_adjust == NULL)
6199 {
6200 /* check_relocs hasn't been called. Must be a ld -r link
6201 or --just-symbols object. */
6202 opd_adjust = bfd_alloc (obfd, amt);
6203 if (opd_adjust == NULL)
6204 return FALSE;
6205 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6206 }
6207 memset (opd_adjust, 0, amt);
6208
6209 if (no_opd_opt)
6210 continue;
6211
6212 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6213 continue;
6214
6215 if (sec->output_section == bfd_abs_section_ptr)
6216 continue;
6217
6218 /* Look through the section relocs. */
6219 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6220 continue;
6221
6222 local_syms = NULL;
6223 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6224 sym_hashes = elf_sym_hashes (ibfd);
6225
6226 /* Read the relocations. */
6227 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6228 info->keep_memory);
6229 if (relstart == NULL)
6230 return FALSE;
6231
6232 /* First run through the relocs to check they are sane, and to
6233 determine whether we need to edit this opd section. */
6234 need_edit = FALSE;
6235 need_pad = sec;
6236 offset = 0;
6237 relend = relstart + sec->reloc_count;
6238 for (rel = relstart; rel < relend; )
6239 {
6240 enum elf_ppc64_reloc_type r_type;
6241 unsigned long r_symndx;
6242 asection *sym_sec;
6243 struct elf_link_hash_entry *h;
6244 Elf_Internal_Sym *sym;
6245
6246 /* .opd contains a regular array of 16 or 24 byte entries. We're
6247 only interested in the reloc pointing to a function entry
6248 point. */
6249 if (rel->r_offset != offset
6250 || rel + 1 >= relend
6251 || (rel + 1)->r_offset != offset + 8)
6252 {
6253 /* If someone messes with .opd alignment then after a
6254 "ld -r" we might have padding in the middle of .opd.
6255 Also, there's nothing to prevent someone putting
6256 something silly in .opd with the assembler. No .opd
6257 optimization for them! */
6258 broken_opd:
6259 (*_bfd_error_handler)
6260 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6261 need_edit = FALSE;
6262 break;
6263 }
6264
6265 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6266 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6267 {
6268 (*_bfd_error_handler)
6269 (_("%B: unexpected reloc type %u in .opd section"),
6270 ibfd, r_type);
6271 need_edit = FALSE;
6272 break;
6273 }
6274
6275 r_symndx = ELF64_R_SYM (rel->r_info);
6276 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6277 r_symndx, ibfd))
6278 goto error_ret;
6279
6280 if (sym_sec == NULL || sym_sec->owner == NULL)
6281 {
6282 const char *sym_name;
6283 if (h != NULL)
6284 sym_name = h->root.root.string;
6285 else
6286 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6287 sym_sec);
6288
6289 (*_bfd_error_handler)
6290 (_("%B: undefined sym `%s' in .opd section"),
6291 ibfd, sym_name);
6292 need_edit = FALSE;
6293 break;
6294 }
6295
6296 /* opd entries are always for functions defined in the
6297 current input bfd. If the symbol isn't defined in the
6298 input bfd, then we won't be using the function in this
6299 bfd; It must be defined in a linkonce section in another
6300 bfd, or is weak. It's also possible that we are
6301 discarding the function due to a linker script /DISCARD/,
6302 which we test for via the output_section. */
6303 if (sym_sec->owner != ibfd
6304 || sym_sec->output_section == bfd_abs_section_ptr)
6305 need_edit = TRUE;
6306
6307 rel += 2;
6308 if (rel == relend
6309 || (rel + 1 == relend && rel->r_offset == offset + 16))
6310 {
6311 if (sec->size == offset + 24)
6312 {
6313 need_pad = NULL;
6314 break;
6315 }
6316 if (rel == relend && sec->size == offset + 16)
6317 {
6318 cnt_16b++;
6319 break;
6320 }
6321 goto broken_opd;
6322 }
6323
6324 if (rel->r_offset == offset + 24)
6325 offset += 24;
6326 else if (rel->r_offset != offset + 16)
6327 goto broken_opd;
6328 else if (rel + 1 < relend
6329 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6330 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6331 {
6332 offset += 16;
6333 cnt_16b++;
6334 }
6335 else if (rel + 2 < relend
6336 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6337 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6338 {
6339 offset += 24;
6340 rel += 1;
6341 }
6342 else
6343 goto broken_opd;
6344 }
6345
6346 add_aux_fields = non_overlapping && cnt_16b > 0;
6347
6348 if (need_edit || add_aux_fields)
6349 {
6350 Elf_Internal_Rela *write_rel;
6351 bfd_byte *rptr, *wptr;
6352 bfd_byte *new_contents = NULL;
6353 bfd_boolean skip;
6354 long opd_ent_size;
6355
6356 /* This seems a waste of time as input .opd sections are all
6357 zeros as generated by gcc, but I suppose there's no reason
6358 this will always be so. We might start putting something in
6359 the third word of .opd entries. */
6360 if ((sec->flags & SEC_IN_MEMORY) == 0)
6361 {
6362 bfd_byte *loc;
6363 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6364 {
6365 if (loc != NULL)
6366 free (loc);
6367 error_ret:
6368 if (local_syms != NULL
6369 && symtab_hdr->contents != (unsigned char *) local_syms)
6370 free (local_syms);
6371 if (elf_section_data (sec)->relocs != relstart)
6372 free (relstart);
6373 return FALSE;
6374 }
6375 sec->contents = loc;
6376 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6377 }
6378
6379 elf_section_data (sec)->relocs = relstart;
6380
6381 new_contents = sec->contents;
6382 if (add_aux_fields)
6383 {
6384 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6385 if (new_contents == NULL)
6386 return FALSE;
6387 need_pad = FALSE;
6388 }
6389 wptr = new_contents;
6390 rptr = sec->contents;
6391
6392 write_rel = relstart;
6393 skip = FALSE;
6394 offset = 0;
6395 opd_ent_size = 0;
6396 for (rel = relstart; rel < relend; rel++)
6397 {
6398 unsigned long r_symndx;
6399 asection *sym_sec;
6400 struct elf_link_hash_entry *h;
6401 Elf_Internal_Sym *sym;
6402
6403 r_symndx = ELF64_R_SYM (rel->r_info);
6404 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6405 r_symndx, ibfd))
6406 goto error_ret;
6407
6408 if (rel->r_offset == offset)
6409 {
6410 struct ppc_link_hash_entry *fdh = NULL;
6411
6412 /* See if the .opd entry is full 24 byte or
6413 16 byte (with fd_aux entry overlapped with next
6414 fd_func). */
6415 opd_ent_size = 24;
6416 if ((rel + 2 == relend && sec->size == offset + 16)
6417 || (rel + 3 < relend
6418 && rel[2].r_offset == offset + 16
6419 && rel[3].r_offset == offset + 24
6420 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6421 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6422 opd_ent_size = 16;
6423
6424 if (h != NULL
6425 && h->root.root.string[0] == '.')
6426 {
6427 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6428 ppc_hash_table (info));
6429 if (fdh != NULL
6430 && fdh->elf.root.type != bfd_link_hash_defined
6431 && fdh->elf.root.type != bfd_link_hash_defweak)
6432 fdh = NULL;
6433 }
6434
6435 skip = (sym_sec->owner != ibfd
6436 || sym_sec->output_section == bfd_abs_section_ptr);
6437 if (skip)
6438 {
6439 if (fdh != NULL && sym_sec->owner == ibfd)
6440 {
6441 /* Arrange for the function descriptor sym
6442 to be dropped. */
6443 fdh->elf.root.u.def.value = 0;
6444 fdh->elf.root.u.def.section = sym_sec;
6445 }
6446 opd_adjust[rel->r_offset / 8] = -1;
6447 }
6448 else
6449 {
6450 /* We'll be keeping this opd entry. */
6451
6452 if (fdh != NULL)
6453 {
6454 /* Redefine the function descriptor symbol to
6455 this location in the opd section. It is
6456 necessary to update the value here rather
6457 than using an array of adjustments as we do
6458 for local symbols, because various places
6459 in the generic ELF code use the value
6460 stored in u.def.value. */
6461 fdh->elf.root.u.def.value = wptr - new_contents;
6462 fdh->adjust_done = 1;
6463 }
6464
6465 /* Local syms are a bit tricky. We could
6466 tweak them as they can be cached, but
6467 we'd need to look through the local syms
6468 for the function descriptor sym which we
6469 don't have at the moment. So keep an
6470 array of adjustments. */
6471 opd_adjust[rel->r_offset / 8]
6472 = (wptr - new_contents) - (rptr - sec->contents);
6473
6474 if (wptr != rptr)
6475 memcpy (wptr, rptr, opd_ent_size);
6476 wptr += opd_ent_size;
6477 if (add_aux_fields && opd_ent_size == 16)
6478 {
6479 memset (wptr, '\0', 8);
6480 wptr += 8;
6481 }
6482 }
6483 rptr += opd_ent_size;
6484 offset += opd_ent_size;
6485 }
6486
6487 if (skip)
6488 {
6489 if (!NO_OPD_RELOCS
6490 && !info->relocatable
6491 && !dec_dynrel_count (rel->r_info, sec, info,
6492 NULL, h, sym_sec))
6493 goto error_ret;
6494 }
6495 else
6496 {
6497 /* We need to adjust any reloc offsets to point to the
6498 new opd entries. While we're at it, we may as well
6499 remove redundant relocs. */
6500 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6501 if (write_rel != rel)
6502 memcpy (write_rel, rel, sizeof (*rel));
6503 ++write_rel;
6504 }
6505 }
6506
6507 sec->size = wptr - new_contents;
6508 sec->reloc_count = write_rel - relstart;
6509 if (add_aux_fields)
6510 {
6511 free (sec->contents);
6512 sec->contents = new_contents;
6513 }
6514
6515 /* Fudge the size too, as this is used later in
6516 elf_bfd_final_link if we are emitting relocs. */
6517 elf_section_data (sec)->rel_hdr.sh_size
6518 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6519 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6520 some_edited = TRUE;
6521 }
6522 else if (elf_section_data (sec)->relocs != relstart)
6523 free (relstart);
6524
6525 if (local_syms != NULL
6526 && symtab_hdr->contents != (unsigned char *) local_syms)
6527 {
6528 if (!info->keep_memory)
6529 free (local_syms);
6530 else
6531 symtab_hdr->contents = (unsigned char *) local_syms;
6532 }
6533 }
6534
6535 if (some_edited)
6536 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6537
6538 /* If we are doing a final link and the last .opd entry is just 16 byte
6539 long, add a 8 byte padding after it. */
6540 if (need_pad != NULL && !info->relocatable)
6541 {
6542 bfd_byte *p;
6543
6544 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6545 {
6546 BFD_ASSERT (need_pad->size > 0);
6547
6548 p = bfd_malloc (need_pad->size + 8);
6549 if (p == NULL)
6550 return FALSE;
6551
6552 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6553 p, 0, need_pad->size))
6554 return FALSE;
6555
6556 need_pad->contents = p;
6557 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6558 }
6559 else
6560 {
6561 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6562 if (p == NULL)
6563 return FALSE;
6564
6565 need_pad->contents = p;
6566 }
6567
6568 memset (need_pad->contents + need_pad->size, 0, 8);
6569 need_pad->size += 8;
6570 }
6571
6572 return TRUE;
6573 }
6574
6575 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6576
6577 asection *
6578 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6579 {
6580 struct ppc_link_hash_table *htab;
6581
6582 htab = ppc_hash_table (info);
6583 if (htab->tls_get_addr != NULL)
6584 {
6585 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6586
6587 while (h->elf.root.type == bfd_link_hash_indirect
6588 || h->elf.root.type == bfd_link_hash_warning)
6589 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6590
6591 htab->tls_get_addr = h;
6592
6593 if (htab->tls_get_addr_fd == NULL
6594 && h->oh != NULL
6595 && h->oh->is_func_descriptor
6596 && (h->oh->elf.root.type == bfd_link_hash_defined
6597 || h->oh->elf.root.type == bfd_link_hash_defweak))
6598 htab->tls_get_addr_fd = h->oh;
6599 }
6600
6601 if (htab->tls_get_addr_fd != NULL)
6602 {
6603 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6604
6605 while (h->elf.root.type == bfd_link_hash_indirect
6606 || h->elf.root.type == bfd_link_hash_warning)
6607 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6608
6609 htab->tls_get_addr_fd = h;
6610 }
6611
6612 return _bfd_elf_tls_setup (obfd, info);
6613 }
6614
6615 /* Run through all the TLS relocs looking for optimization
6616 opportunities. The linker has been hacked (see ppc64elf.em) to do
6617 a preliminary section layout so that we know the TLS segment
6618 offsets. We can't optimize earlier because some optimizations need
6619 to know the tp offset, and we need to optimize before allocating
6620 dynamic relocations. */
6621
6622 bfd_boolean
6623 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6624 {
6625 bfd *ibfd;
6626 asection *sec;
6627 struct ppc_link_hash_table *htab;
6628
6629 if (info->relocatable || info->shared)
6630 return TRUE;
6631
6632 htab = ppc_hash_table (info);
6633 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6634 {
6635 Elf_Internal_Sym *locsyms = NULL;
6636
6637 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6638 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6639 {
6640 Elf_Internal_Rela *relstart, *rel, *relend;
6641 int expecting_tls_get_addr;
6642
6643 /* Read the relocations. */
6644 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6645 info->keep_memory);
6646 if (relstart == NULL)
6647 return FALSE;
6648
6649 expecting_tls_get_addr = 0;
6650 relend = relstart + sec->reloc_count;
6651 for (rel = relstart; rel < relend; rel++)
6652 {
6653 enum elf_ppc64_reloc_type r_type;
6654 unsigned long r_symndx;
6655 struct elf_link_hash_entry *h;
6656 Elf_Internal_Sym *sym;
6657 asection *sym_sec;
6658 char *tls_mask;
6659 char tls_set, tls_clear, tls_type = 0;
6660 bfd_vma value;
6661 bfd_boolean ok_tprel, is_local;
6662
6663 r_symndx = ELF64_R_SYM (rel->r_info);
6664 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6665 r_symndx, ibfd))
6666 {
6667 err_free_rel:
6668 if (elf_section_data (sec)->relocs != relstart)
6669 free (relstart);
6670 if (locsyms != NULL
6671 && (elf_tdata (ibfd)->symtab_hdr.contents
6672 != (unsigned char *) locsyms))
6673 free (locsyms);
6674 return FALSE;
6675 }
6676
6677 if (h != NULL)
6678 {
6679 if (h->root.type != bfd_link_hash_defined
6680 && h->root.type != bfd_link_hash_defweak)
6681 continue;
6682 value = h->root.u.def.value;
6683 }
6684 else
6685 /* Symbols referenced by TLS relocs must be of type
6686 STT_TLS. So no need for .opd local sym adjust. */
6687 value = sym->st_value;
6688
6689 ok_tprel = FALSE;
6690 is_local = FALSE;
6691 if (h == NULL
6692 || !h->def_dynamic)
6693 {
6694 is_local = TRUE;
6695 value += sym_sec->output_offset;
6696 value += sym_sec->output_section->vma;
6697 value -= htab->elf.tls_sec->vma;
6698 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6699 < (bfd_vma) 1 << 32);
6700 }
6701
6702 r_type = ELF64_R_TYPE (rel->r_info);
6703 switch (r_type)
6704 {
6705 case R_PPC64_GOT_TLSLD16:
6706 case R_PPC64_GOT_TLSLD16_LO:
6707 case R_PPC64_GOT_TLSLD16_HI:
6708 case R_PPC64_GOT_TLSLD16_HA:
6709 /* These relocs should never be against a symbol
6710 defined in a shared lib. Leave them alone if
6711 that turns out to be the case. */
6712 ppc64_tlsld_got (ibfd)->refcount -= 1;
6713 if (!is_local)
6714 continue;
6715
6716 /* LD -> LE */
6717 tls_set = 0;
6718 tls_clear = TLS_LD;
6719 tls_type = TLS_TLS | TLS_LD;
6720 expecting_tls_get_addr = 1;
6721 break;
6722
6723 case R_PPC64_GOT_TLSGD16:
6724 case R_PPC64_GOT_TLSGD16_LO:
6725 case R_PPC64_GOT_TLSGD16_HI:
6726 case R_PPC64_GOT_TLSGD16_HA:
6727 if (ok_tprel)
6728 /* GD -> LE */
6729 tls_set = 0;
6730 else
6731 /* GD -> IE */
6732 tls_set = TLS_TLS | TLS_TPRELGD;
6733 tls_clear = TLS_GD;
6734 tls_type = TLS_TLS | TLS_GD;
6735 expecting_tls_get_addr = 1;
6736 break;
6737
6738 case R_PPC64_GOT_TPREL16_DS:
6739 case R_PPC64_GOT_TPREL16_LO_DS:
6740 case R_PPC64_GOT_TPREL16_HI:
6741 case R_PPC64_GOT_TPREL16_HA:
6742 expecting_tls_get_addr = 0;
6743 if (ok_tprel)
6744 {
6745 /* IE -> LE */
6746 tls_set = 0;
6747 tls_clear = TLS_TPREL;
6748 tls_type = TLS_TLS | TLS_TPREL;
6749 break;
6750 }
6751 else
6752 continue;
6753
6754 case R_PPC64_REL14:
6755 case R_PPC64_REL14_BRTAKEN:
6756 case R_PPC64_REL14_BRNTAKEN:
6757 case R_PPC64_REL24:
6758 if (h != NULL
6759 && (h == &htab->tls_get_addr->elf
6760 || h == &htab->tls_get_addr_fd->elf))
6761 {
6762 if (!expecting_tls_get_addr
6763 && rel != relstart
6764 && ((ELF64_R_TYPE (rel[-1].r_info)
6765 == R_PPC64_TOC16)
6766 || (ELF64_R_TYPE (rel[-1].r_info)
6767 == R_PPC64_TOC16_LO)))
6768 {
6769 /* Check for toc tls entries. */
6770 char *toc_tls;
6771 int retval;
6772
6773 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6774 rel - 1, ibfd);
6775 if (retval == 0)
6776 goto err_free_rel;
6777 if (toc_tls != NULL)
6778 expecting_tls_get_addr = retval > 1;
6779 }
6780
6781 if (expecting_tls_get_addr)
6782 {
6783 struct plt_entry *ent;
6784 for (ent = h->plt.plist; ent; ent = ent->next)
6785 if (ent->addend == 0)
6786 {
6787 if (ent->plt.refcount > 0)
6788 ent->plt.refcount -= 1;
6789 break;
6790 }
6791 }
6792 }
6793 expecting_tls_get_addr = 0;
6794 continue;
6795
6796 case R_PPC64_TPREL64:
6797 expecting_tls_get_addr = 0;
6798 if (ok_tprel)
6799 {
6800 /* IE -> LE */
6801 tls_set = TLS_EXPLICIT;
6802 tls_clear = TLS_TPREL;
6803 break;
6804 }
6805 else
6806 continue;
6807
6808 case R_PPC64_DTPMOD64:
6809 expecting_tls_get_addr = 0;
6810 if (rel + 1 < relend
6811 && (rel[1].r_info
6812 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6813 && rel[1].r_offset == rel->r_offset + 8)
6814 {
6815 if (ok_tprel)
6816 /* GD -> LE */
6817 tls_set = TLS_EXPLICIT | TLS_GD;
6818 else
6819 /* GD -> IE */
6820 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6821 tls_clear = TLS_GD;
6822 }
6823 else
6824 {
6825 if (!is_local)
6826 continue;
6827
6828 /* LD -> LE */
6829 tls_set = TLS_EXPLICIT;
6830 tls_clear = TLS_LD;
6831 }
6832 break;
6833
6834 default:
6835 expecting_tls_get_addr = 0;
6836 continue;
6837 }
6838
6839 if ((tls_set & TLS_EXPLICIT) == 0)
6840 {
6841 struct got_entry *ent;
6842
6843 /* Adjust got entry for this reloc. */
6844 if (h != NULL)
6845 ent = h->got.glist;
6846 else
6847 ent = elf_local_got_ents (ibfd)[r_symndx];
6848
6849 for (; ent != NULL; ent = ent->next)
6850 if (ent->addend == rel->r_addend
6851 && ent->owner == ibfd
6852 && ent->tls_type == tls_type)
6853 break;
6854 if (ent == NULL)
6855 abort ();
6856
6857 if (tls_set == 0)
6858 {
6859 /* We managed to get rid of a got entry. */
6860 if (ent->got.refcount > 0)
6861 ent->got.refcount -= 1;
6862 }
6863 }
6864 else
6865 {
6866 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6867 we'll lose one or two dyn relocs. */
6868 if (!dec_dynrel_count (rel->r_info, sec, info,
6869 NULL, h, sym_sec))
6870 return FALSE;
6871
6872 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6873 {
6874 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6875 NULL, h, sym_sec))
6876 return FALSE;
6877 }
6878 }
6879
6880 *tls_mask |= tls_set;
6881 *tls_mask &= ~tls_clear;
6882 }
6883
6884 if (elf_section_data (sec)->relocs != relstart)
6885 free (relstart);
6886 }
6887
6888 if (locsyms != NULL
6889 && (elf_tdata (ibfd)->symtab_hdr.contents
6890 != (unsigned char *) locsyms))
6891 {
6892 if (!info->keep_memory)
6893 free (locsyms);
6894 else
6895 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6896 }
6897 }
6898 return TRUE;
6899 }
6900
6901 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6902 the values of any global symbols in a toc section that has been
6903 edited. Globals in toc sections should be a rarity, so this function
6904 sets a flag if any are found in toc sections other than the one just
6905 edited, so that futher hash table traversals can be avoided. */
6906
6907 struct adjust_toc_info
6908 {
6909 asection *toc;
6910 unsigned long *skip;
6911 bfd_boolean global_toc_syms;
6912 };
6913
6914 static bfd_boolean
6915 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6916 {
6917 struct ppc_link_hash_entry *eh;
6918 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6919
6920 if (h->root.type == bfd_link_hash_indirect)
6921 return TRUE;
6922
6923 if (h->root.type == bfd_link_hash_warning)
6924 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6925
6926 if (h->root.type != bfd_link_hash_defined
6927 && h->root.type != bfd_link_hash_defweak)
6928 return TRUE;
6929
6930 eh = (struct ppc_link_hash_entry *) h;
6931 if (eh->adjust_done)
6932 return TRUE;
6933
6934 if (eh->elf.root.u.def.section == toc_inf->toc)
6935 {
6936 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6937 if (skip != (unsigned long) -1)
6938 eh->elf.root.u.def.value -= skip;
6939 else
6940 {
6941 (*_bfd_error_handler)
6942 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6943 eh->elf.root.u.def.section = &bfd_abs_section;
6944 eh->elf.root.u.def.value = 0;
6945 }
6946 eh->adjust_done = 1;
6947 }
6948 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6949 toc_inf->global_toc_syms = TRUE;
6950
6951 return TRUE;
6952 }
6953
6954 /* Examine all relocs referencing .toc sections in order to remove
6955 unused .toc entries. */
6956
6957 bfd_boolean
6958 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6959 {
6960 bfd *ibfd;
6961 struct adjust_toc_info toc_inf;
6962
6963 toc_inf.global_toc_syms = TRUE;
6964 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6965 {
6966 asection *toc, *sec;
6967 Elf_Internal_Shdr *symtab_hdr;
6968 Elf_Internal_Sym *local_syms;
6969 struct elf_link_hash_entry **sym_hashes;
6970 Elf_Internal_Rela *relstart, *rel;
6971 unsigned long *skip, *drop;
6972 unsigned char *used;
6973 unsigned char *keep, last, some_unused;
6974
6975 toc = bfd_get_section_by_name (ibfd, ".toc");
6976 if (toc == NULL
6977 || toc->size == 0
6978 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6979 || elf_discarded_section (toc))
6980 continue;
6981
6982 local_syms = NULL;
6983 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6984 sym_hashes = elf_sym_hashes (ibfd);
6985
6986 /* Look at sections dropped from the final link. */
6987 skip = NULL;
6988 relstart = NULL;
6989 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6990 {
6991 if (sec->reloc_count == 0
6992 || !elf_discarded_section (sec)
6993 || get_opd_info (sec)
6994 || (sec->flags & SEC_ALLOC) == 0
6995 || (sec->flags & SEC_DEBUGGING) != 0)
6996 continue;
6997
6998 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6999 if (relstart == NULL)
7000 goto error_ret;
7001
7002 /* Run through the relocs to see which toc entries might be
7003 unused. */
7004 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7005 {
7006 enum elf_ppc64_reloc_type r_type;
7007 unsigned long r_symndx;
7008 asection *sym_sec;
7009 struct elf_link_hash_entry *h;
7010 Elf_Internal_Sym *sym;
7011 bfd_vma val;
7012
7013 r_type = ELF64_R_TYPE (rel->r_info);
7014 switch (r_type)
7015 {
7016 default:
7017 continue;
7018
7019 case R_PPC64_TOC16:
7020 case R_PPC64_TOC16_LO:
7021 case R_PPC64_TOC16_HI:
7022 case R_PPC64_TOC16_HA:
7023 case R_PPC64_TOC16_DS:
7024 case R_PPC64_TOC16_LO_DS:
7025 break;
7026 }
7027
7028 r_symndx = ELF64_R_SYM (rel->r_info);
7029 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7030 r_symndx, ibfd))
7031 goto error_ret;
7032
7033 if (sym_sec != toc)
7034 continue;
7035
7036 if (h != NULL)
7037 val = h->root.u.def.value;
7038 else
7039 val = sym->st_value;
7040 val += rel->r_addend;
7041
7042 if (val >= toc->size)
7043 continue;
7044
7045 /* Anything in the toc ought to be aligned to 8 bytes.
7046 If not, don't mark as unused. */
7047 if (val & 7)
7048 continue;
7049
7050 if (skip == NULL)
7051 {
7052 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7053 if (skip == NULL)
7054 goto error_ret;
7055 }
7056
7057 skip[val >> 3] = 1;
7058 }
7059
7060 if (elf_section_data (sec)->relocs != relstart)
7061 free (relstart);
7062 }
7063
7064 if (skip == NULL)
7065 continue;
7066
7067 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7068 if (used == NULL)
7069 {
7070 error_ret:
7071 if (local_syms != NULL
7072 && symtab_hdr->contents != (unsigned char *) local_syms)
7073 free (local_syms);
7074 if (sec != NULL
7075 && relstart != NULL
7076 && elf_section_data (sec)->relocs != relstart)
7077 free (relstart);
7078 if (skip != NULL)
7079 free (skip);
7080 return FALSE;
7081 }
7082
7083 /* Now check all kept sections that might reference the toc. */
7084 for (sec = ibfd->sections;
7085 sec != NULL;
7086 /* Check the toc itself last. */
7087 sec = (sec == toc ? NULL
7088 : sec->next == toc && sec->next->next ? sec->next->next
7089 : sec->next == NULL ? toc
7090 : sec->next))
7091 {
7092 int repeat;
7093
7094 if (sec->reloc_count == 0
7095 || elf_discarded_section (sec)
7096 || get_opd_info (sec)
7097 || (sec->flags & SEC_ALLOC) == 0
7098 || (sec->flags & SEC_DEBUGGING) != 0)
7099 continue;
7100
7101 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7102 if (relstart == NULL)
7103 goto error_ret;
7104
7105 /* Mark toc entries referenced as used. */
7106 repeat = 0;
7107 do
7108 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7109 {
7110 enum elf_ppc64_reloc_type r_type;
7111 unsigned long r_symndx;
7112 asection *sym_sec;
7113 struct elf_link_hash_entry *h;
7114 Elf_Internal_Sym *sym;
7115 bfd_vma val;
7116
7117 r_type = ELF64_R_TYPE (rel->r_info);
7118 switch (r_type)
7119 {
7120 case R_PPC64_TOC16:
7121 case R_PPC64_TOC16_LO:
7122 case R_PPC64_TOC16_HI:
7123 case R_PPC64_TOC16_HA:
7124 case R_PPC64_TOC16_DS:
7125 case R_PPC64_TOC16_LO_DS:
7126 /* In case we're taking addresses of toc entries. */
7127 case R_PPC64_ADDR64:
7128 break;
7129
7130 default:
7131 continue;
7132 }
7133
7134 r_symndx = ELF64_R_SYM (rel->r_info);
7135 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7136 r_symndx, ibfd))
7137 {
7138 free (used);
7139 goto error_ret;
7140 }
7141
7142 if (sym_sec != toc)
7143 continue;
7144
7145 if (h != NULL)
7146 val = h->root.u.def.value;
7147 else
7148 val = sym->st_value;
7149 val += rel->r_addend;
7150
7151 if (val >= toc->size)
7152 continue;
7153
7154 /* For the toc section, we only mark as used if
7155 this entry itself isn't unused. */
7156 if (sec == toc
7157 && !used[val >> 3]
7158 && (used[rel->r_offset >> 3]
7159 || !skip[rel->r_offset >> 3]))
7160 /* Do all the relocs again, to catch reference
7161 chains. */
7162 repeat = 1;
7163
7164 used[val >> 3] = 1;
7165 }
7166 while (repeat);
7167 }
7168
7169 /* Merge the used and skip arrays. Assume that TOC
7170 doublewords not appearing as either used or unused belong
7171 to to an entry more than one doubleword in size. */
7172 for (drop = skip, keep = used, last = 0, some_unused = 0;
7173 drop < skip + (toc->size + 7) / 8;
7174 ++drop, ++keep)
7175 {
7176 if (*keep)
7177 {
7178 *drop = 0;
7179 last = 0;
7180 }
7181 else if (*drop)
7182 {
7183 some_unused = 1;
7184 last = 1;
7185 }
7186 else
7187 *drop = last;
7188 }
7189
7190 free (used);
7191
7192 if (some_unused)
7193 {
7194 bfd_byte *contents, *src;
7195 unsigned long off;
7196
7197 /* Shuffle the toc contents, and at the same time convert the
7198 skip array from booleans into offsets. */
7199 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7200 goto error_ret;
7201
7202 elf_section_data (toc)->this_hdr.contents = contents;
7203
7204 for (src = contents, off = 0, drop = skip;
7205 src < contents + toc->size;
7206 src += 8, ++drop)
7207 {
7208 if (*drop)
7209 {
7210 *drop = (unsigned long) -1;
7211 off += 8;
7212 }
7213 else if (off != 0)
7214 {
7215 *drop = off;
7216 memcpy (src - off, src, 8);
7217 }
7218 }
7219 toc->rawsize = toc->size;
7220 toc->size = src - contents - off;
7221
7222 if (toc->reloc_count != 0)
7223 {
7224 Elf_Internal_Rela *wrel;
7225 bfd_size_type sz;
7226
7227 /* Read toc relocs. */
7228 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7229 TRUE);
7230 if (relstart == NULL)
7231 goto error_ret;
7232
7233 /* Remove unused toc relocs, and adjust those we keep. */
7234 wrel = relstart;
7235 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7236 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7237 {
7238 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7239 wrel->r_info = rel->r_info;
7240 wrel->r_addend = rel->r_addend;
7241 ++wrel;
7242 }
7243 else if (!dec_dynrel_count (rel->r_info, toc, info,
7244 &local_syms, NULL, NULL))
7245 goto error_ret;
7246
7247 toc->reloc_count = wrel - relstart;
7248 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7249 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7250 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7251 }
7252
7253 /* Adjust addends for relocs against the toc section sym. */
7254 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7255 {
7256 if (sec->reloc_count == 0
7257 || elf_discarded_section (sec))
7258 continue;
7259
7260 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7261 TRUE);
7262 if (relstart == NULL)
7263 goto error_ret;
7264
7265 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7266 {
7267 enum elf_ppc64_reloc_type r_type;
7268 unsigned long r_symndx;
7269 asection *sym_sec;
7270 struct elf_link_hash_entry *h;
7271 Elf_Internal_Sym *sym;
7272
7273 r_type = ELF64_R_TYPE (rel->r_info);
7274 switch (r_type)
7275 {
7276 default:
7277 continue;
7278
7279 case R_PPC64_TOC16:
7280 case R_PPC64_TOC16_LO:
7281 case R_PPC64_TOC16_HI:
7282 case R_PPC64_TOC16_HA:
7283 case R_PPC64_TOC16_DS:
7284 case R_PPC64_TOC16_LO_DS:
7285 case R_PPC64_ADDR64:
7286 break;
7287 }
7288
7289 r_symndx = ELF64_R_SYM (rel->r_info);
7290 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7291 r_symndx, ibfd))
7292 goto error_ret;
7293
7294 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7295 continue;
7296
7297 rel->r_addend -= skip[rel->r_addend >> 3];
7298 }
7299 }
7300
7301 /* We shouldn't have local or global symbols defined in the TOC,
7302 but handle them anyway. */
7303 if (local_syms != NULL)
7304 {
7305 Elf_Internal_Sym *sym;
7306
7307 for (sym = local_syms;
7308 sym < local_syms + symtab_hdr->sh_info;
7309 ++sym)
7310 if (sym->st_shndx != SHN_UNDEF
7311 && (sym->st_shndx < SHN_LORESERVE
7312 || sym->st_shndx > SHN_HIRESERVE)
7313 && sym->st_value != 0
7314 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7315 {
7316 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7317 sym->st_value -= skip[sym->st_value >> 3];
7318 else
7319 {
7320 (*_bfd_error_handler)
7321 (_("%s defined in removed toc entry"),
7322 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7323 NULL));
7324 sym->st_value = 0;
7325 sym->st_shndx = SHN_ABS;
7326 }
7327 symtab_hdr->contents = (unsigned char *) local_syms;
7328 }
7329 }
7330
7331 /* Finally, adjust any global syms defined in the toc. */
7332 if (toc_inf.global_toc_syms)
7333 {
7334 toc_inf.toc = toc;
7335 toc_inf.skip = skip;
7336 toc_inf.global_toc_syms = FALSE;
7337 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7338 &toc_inf);
7339 }
7340 }
7341
7342 if (local_syms != NULL
7343 && symtab_hdr->contents != (unsigned char *) local_syms)
7344 {
7345 if (!info->keep_memory)
7346 free (local_syms);
7347 else
7348 symtab_hdr->contents = (unsigned char *) local_syms;
7349 }
7350 free (skip);
7351 }
7352
7353 return TRUE;
7354 }
7355
7356 /* Allocate space in .plt, .got and associated reloc sections for
7357 dynamic relocs. */
7358
7359 static bfd_boolean
7360 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7361 {
7362 struct bfd_link_info *info;
7363 struct ppc_link_hash_table *htab;
7364 asection *s;
7365 struct ppc_link_hash_entry *eh;
7366 struct ppc_dyn_relocs *p;
7367 struct got_entry *gent;
7368
7369 if (h->root.type == bfd_link_hash_indirect)
7370 return TRUE;
7371
7372 if (h->root.type == bfd_link_hash_warning)
7373 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7374
7375 info = (struct bfd_link_info *) inf;
7376 htab = ppc_hash_table (info);
7377
7378 if (htab->elf.dynamic_sections_created
7379 && h->dynindx != -1
7380 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7381 {
7382 struct plt_entry *pent;
7383 bfd_boolean doneone = FALSE;
7384 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7385 if (pent->plt.refcount > 0)
7386 {
7387 /* If this is the first .plt entry, make room for the special
7388 first entry. */
7389 s = htab->plt;
7390 if (s->size == 0)
7391 s->size += PLT_INITIAL_ENTRY_SIZE;
7392
7393 pent->plt.offset = s->size;
7394
7395 /* Make room for this entry. */
7396 s->size += PLT_ENTRY_SIZE;
7397
7398 /* Make room for the .glink code. */
7399 s = htab->glink;
7400 if (s->size == 0)
7401 s->size += GLINK_CALL_STUB_SIZE;
7402 /* We need bigger stubs past index 32767. */
7403 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7404 s->size += 4;
7405 s->size += 2*4;
7406
7407 /* We also need to make an entry in the .rela.plt section. */
7408 s = htab->relplt;
7409 s->size += sizeof (Elf64_External_Rela);
7410 doneone = TRUE;
7411 }
7412 else
7413 pent->plt.offset = (bfd_vma) -1;
7414 if (!doneone)
7415 {
7416 h->plt.plist = NULL;
7417 h->needs_plt = 0;
7418 }
7419 }
7420 else
7421 {
7422 h->plt.plist = NULL;
7423 h->needs_plt = 0;
7424 }
7425
7426 eh = (struct ppc_link_hash_entry *) h;
7427 /* Run through the TLS GD got entries first if we're changing them
7428 to TPREL. */
7429 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7430 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7431 if (gent->got.refcount > 0
7432 && (gent->tls_type & TLS_GD) != 0)
7433 {
7434 /* This was a GD entry that has been converted to TPREL. If
7435 there happens to be a TPREL entry we can use that one. */
7436 struct got_entry *ent;
7437 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7438 if (ent->got.refcount > 0
7439 && (ent->tls_type & TLS_TPREL) != 0
7440 && ent->addend == gent->addend
7441 && ent->owner == gent->owner)
7442 {
7443 gent->got.refcount = 0;
7444 break;
7445 }
7446
7447 /* If not, then we'll be using our own TPREL entry. */
7448 if (gent->got.refcount != 0)
7449 gent->tls_type = TLS_TLS | TLS_TPREL;
7450 }
7451
7452 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7453 if (gent->got.refcount > 0)
7454 {
7455 bfd_boolean dyn;
7456
7457 /* Make sure this symbol is output as a dynamic symbol.
7458 Undefined weak syms won't yet be marked as dynamic,
7459 nor will all TLS symbols. */
7460 if (h->dynindx == -1
7461 && !h->forced_local)
7462 {
7463 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7464 return FALSE;
7465 }
7466
7467 if ((gent->tls_type & TLS_LD) != 0
7468 && !h->def_dynamic)
7469 {
7470 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7471 continue;
7472 }
7473
7474 s = ppc64_elf_tdata (gent->owner)->got;
7475 gent->got.offset = s->size;
7476 s->size
7477 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7478 dyn = htab->elf.dynamic_sections_created;
7479 if ((info->shared
7480 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7481 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7482 || h->root.type != bfd_link_hash_undefweak))
7483 ppc64_elf_tdata (gent->owner)->relgot->size
7484 += (gent->tls_type & eh->tls_mask & TLS_GD
7485 ? 2 * sizeof (Elf64_External_Rela)
7486 : sizeof (Elf64_External_Rela));
7487 }
7488 else
7489 gent->got.offset = (bfd_vma) -1;
7490
7491 if (eh->dyn_relocs == NULL)
7492 return TRUE;
7493
7494 /* In the shared -Bsymbolic case, discard space allocated for
7495 dynamic pc-relative relocs against symbols which turn out to be
7496 defined in regular objects. For the normal shared case, discard
7497 space for relocs that have become local due to symbol visibility
7498 changes. */
7499
7500 if (info->shared)
7501 {
7502 /* Relocs that use pc_count are those that appear on a call insn,
7503 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7504 generated via assembly. We want calls to protected symbols to
7505 resolve directly to the function rather than going via the plt.
7506 If people want function pointer comparisons to work as expected
7507 then they should avoid writing weird assembly. */
7508 if (SYMBOL_CALLS_LOCAL (info, h))
7509 {
7510 struct ppc_dyn_relocs **pp;
7511
7512 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7513 {
7514 p->count -= p->pc_count;
7515 p->pc_count = 0;
7516 if (p->count == 0)
7517 *pp = p->next;
7518 else
7519 pp = &p->next;
7520 }
7521 }
7522
7523 /* Also discard relocs on undefined weak syms with non-default
7524 visibility. */
7525 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7526 && h->root.type == bfd_link_hash_undefweak)
7527 eh->dyn_relocs = NULL;
7528 }
7529 else if (ELIMINATE_COPY_RELOCS)
7530 {
7531 /* For the non-shared case, discard space for relocs against
7532 symbols which turn out to need copy relocs or are not
7533 dynamic. */
7534
7535 if (!h->non_got_ref
7536 && h->def_dynamic
7537 && !h->def_regular)
7538 {
7539 /* Make sure this symbol is output as a dynamic symbol.
7540 Undefined weak syms won't yet be marked as dynamic. */
7541 if (h->dynindx == -1
7542 && !h->forced_local)
7543 {
7544 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7545 return FALSE;
7546 }
7547
7548 /* If that succeeded, we know we'll be keeping all the
7549 relocs. */
7550 if (h->dynindx != -1)
7551 goto keep;
7552 }
7553
7554 eh->dyn_relocs = NULL;
7555
7556 keep: ;
7557 }
7558
7559 /* Finally, allocate space. */
7560 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7561 {
7562 asection *sreloc = elf_section_data (p->sec)->sreloc;
7563 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7564 }
7565
7566 return TRUE;
7567 }
7568
7569 /* Find any dynamic relocs that apply to read-only sections. */
7570
7571 static bfd_boolean
7572 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7573 {
7574 struct ppc_link_hash_entry *eh;
7575 struct ppc_dyn_relocs *p;
7576
7577 if (h->root.type == bfd_link_hash_warning)
7578 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7579
7580 eh = (struct ppc_link_hash_entry *) h;
7581 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7582 {
7583 asection *s = p->sec->output_section;
7584
7585 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7586 {
7587 struct bfd_link_info *info = inf;
7588
7589 info->flags |= DF_TEXTREL;
7590
7591 /* Not an error, just cut short the traversal. */
7592 return FALSE;
7593 }
7594 }
7595 return TRUE;
7596 }
7597
7598 /* Set the sizes of the dynamic sections. */
7599
7600 static bfd_boolean
7601 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7602 struct bfd_link_info *info)
7603 {
7604 struct ppc_link_hash_table *htab;
7605 bfd *dynobj;
7606 asection *s;
7607 bfd_boolean relocs;
7608 bfd *ibfd;
7609
7610 htab = ppc_hash_table (info);
7611 dynobj = htab->elf.dynobj;
7612 if (dynobj == NULL)
7613 abort ();
7614
7615 if (htab->elf.dynamic_sections_created)
7616 {
7617 /* Set the contents of the .interp section to the interpreter. */
7618 if (info->executable)
7619 {
7620 s = bfd_get_section_by_name (dynobj, ".interp");
7621 if (s == NULL)
7622 abort ();
7623 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7624 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7625 }
7626 }
7627
7628 /* Set up .got offsets for local syms, and space for local dynamic
7629 relocs. */
7630 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7631 {
7632 struct got_entry **lgot_ents;
7633 struct got_entry **end_lgot_ents;
7634 char *lgot_masks;
7635 bfd_size_type locsymcount;
7636 Elf_Internal_Shdr *symtab_hdr;
7637 asection *srel;
7638
7639 if (!is_ppc64_elf_target (ibfd->xvec))
7640 continue;
7641
7642 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7643 {
7644 s = ppc64_elf_tdata (ibfd)->got;
7645 ppc64_tlsld_got (ibfd)->offset = s->size;
7646 s->size += 16;
7647 if (info->shared)
7648 {
7649 srel = ppc64_elf_tdata (ibfd)->relgot;
7650 srel->size += sizeof (Elf64_External_Rela);
7651 }
7652 }
7653 else
7654 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7655
7656 for (s = ibfd->sections; s != NULL; s = s->next)
7657 {
7658 struct ppc_dyn_relocs *p;
7659
7660 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7661 {
7662 if (!bfd_is_abs_section (p->sec)
7663 && bfd_is_abs_section (p->sec->output_section))
7664 {
7665 /* Input section has been discarded, either because
7666 it is a copy of a linkonce section or due to
7667 linker script /DISCARD/, so we'll be discarding
7668 the relocs too. */
7669 }
7670 else if (p->count != 0)
7671 {
7672 srel = elf_section_data (p->sec)->sreloc;
7673 srel->size += p->count * sizeof (Elf64_External_Rela);
7674 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7675 info->flags |= DF_TEXTREL;
7676 }
7677 }
7678 }
7679
7680 lgot_ents = elf_local_got_ents (ibfd);
7681 if (!lgot_ents)
7682 continue;
7683
7684 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7685 locsymcount = symtab_hdr->sh_info;
7686 end_lgot_ents = lgot_ents + locsymcount;
7687 lgot_masks = (char *) end_lgot_ents;
7688 s = ppc64_elf_tdata (ibfd)->got;
7689 srel = ppc64_elf_tdata (ibfd)->relgot;
7690 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7691 {
7692 struct got_entry *ent;
7693
7694 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7695 if (ent->got.refcount > 0)
7696 {
7697 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7698 {
7699 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7700 {
7701 ppc64_tlsld_got (ibfd)->offset = s->size;
7702 s->size += 16;
7703 if (info->shared)
7704 srel->size += sizeof (Elf64_External_Rela);
7705 }
7706 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7707 }
7708 else
7709 {
7710 ent->got.offset = s->size;
7711 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7712 {
7713 s->size += 16;
7714 if (info->shared)
7715 srel->size += 2 * sizeof (Elf64_External_Rela);
7716 }
7717 else
7718 {
7719 s->size += 8;
7720 if (info->shared)
7721 srel->size += sizeof (Elf64_External_Rela);
7722 }
7723 }
7724 }
7725 else
7726 ent->got.offset = (bfd_vma) -1;
7727 }
7728 }
7729
7730 /* Allocate global sym .plt and .got entries, and space for global
7731 sym dynamic relocs. */
7732 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7733
7734 /* We now have determined the sizes of the various dynamic sections.
7735 Allocate memory for them. */
7736 relocs = FALSE;
7737 for (s = dynobj->sections; s != NULL; s = s->next)
7738 {
7739 if ((s->flags & SEC_LINKER_CREATED) == 0)
7740 continue;
7741
7742 if (s == htab->brlt || s == htab->relbrlt)
7743 /* These haven't been allocated yet; don't strip. */
7744 continue;
7745 else if (s == htab->got
7746 || s == htab->plt
7747 || s == htab->glink
7748 || s == htab->dynbss)
7749 {
7750 /* Strip this section if we don't need it; see the
7751 comment below. */
7752 }
7753 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7754 {
7755 if (s->size != 0)
7756 {
7757 if (s != htab->relplt)
7758 relocs = TRUE;
7759
7760 /* We use the reloc_count field as a counter if we need
7761 to copy relocs into the output file. */
7762 s->reloc_count = 0;
7763 }
7764 }
7765 else
7766 {
7767 /* It's not one of our sections, so don't allocate space. */
7768 continue;
7769 }
7770
7771 if (s->size == 0)
7772 {
7773 /* If we don't need this section, strip it from the
7774 output file. This is mostly to handle .rela.bss and
7775 .rela.plt. We must create both sections in
7776 create_dynamic_sections, because they must be created
7777 before the linker maps input sections to output
7778 sections. The linker does that before
7779 adjust_dynamic_symbol is called, and it is that
7780 function which decides whether anything needs to go
7781 into these sections. */
7782 s->flags |= SEC_EXCLUDE;
7783 continue;
7784 }
7785
7786 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7787 continue;
7788
7789 /* Allocate memory for the section contents. We use bfd_zalloc
7790 here in case unused entries are not reclaimed before the
7791 section's contents are written out. This should not happen,
7792 but this way if it does we get a R_PPC64_NONE reloc in .rela
7793 sections instead of garbage.
7794 We also rely on the section contents being zero when writing
7795 the GOT. */
7796 s->contents = bfd_zalloc (dynobj, s->size);
7797 if (s->contents == NULL)
7798 return FALSE;
7799 }
7800
7801 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7802 {
7803 if (!is_ppc64_elf_target (ibfd->xvec))
7804 continue;
7805
7806 s = ppc64_elf_tdata (ibfd)->got;
7807 if (s != NULL && s != htab->got)
7808 {
7809 if (s->size == 0)
7810 s->flags |= SEC_EXCLUDE;
7811 else
7812 {
7813 s->contents = bfd_zalloc (ibfd, s->size);
7814 if (s->contents == NULL)
7815 return FALSE;
7816 }
7817 }
7818 s = ppc64_elf_tdata (ibfd)->relgot;
7819 if (s != NULL)
7820 {
7821 if (s->size == 0)
7822 s->flags |= SEC_EXCLUDE;
7823 else
7824 {
7825 s->contents = bfd_zalloc (ibfd, s->size);
7826 if (s->contents == NULL)
7827 return FALSE;
7828 relocs = TRUE;
7829 s->reloc_count = 0;
7830 }
7831 }
7832 }
7833
7834 if (htab->elf.dynamic_sections_created)
7835 {
7836 /* Add some entries to the .dynamic section. We fill in the
7837 values later, in ppc64_elf_finish_dynamic_sections, but we
7838 must add the entries now so that we get the correct size for
7839 the .dynamic section. The DT_DEBUG entry is filled in by the
7840 dynamic linker and used by the debugger. */
7841 #define add_dynamic_entry(TAG, VAL) \
7842 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7843
7844 if (info->executable)
7845 {
7846 if (!add_dynamic_entry (DT_DEBUG, 0))
7847 return FALSE;
7848 }
7849
7850 if (htab->plt != NULL && htab->plt->size != 0)
7851 {
7852 if (!add_dynamic_entry (DT_PLTGOT, 0)
7853 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7854 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7855 || !add_dynamic_entry (DT_JMPREL, 0)
7856 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7857 return FALSE;
7858 }
7859
7860 if (NO_OPD_RELOCS)
7861 {
7862 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7863 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7864 return FALSE;
7865 }
7866
7867 if (relocs)
7868 {
7869 if (!add_dynamic_entry (DT_RELA, 0)
7870 || !add_dynamic_entry (DT_RELASZ, 0)
7871 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7872 return FALSE;
7873
7874 /* If any dynamic relocs apply to a read-only section,
7875 then we need a DT_TEXTREL entry. */
7876 if ((info->flags & DF_TEXTREL) == 0)
7877 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7878
7879 if ((info->flags & DF_TEXTREL) != 0)
7880 {
7881 if (!add_dynamic_entry (DT_TEXTREL, 0))
7882 return FALSE;
7883 }
7884 }
7885 }
7886 #undef add_dynamic_entry
7887
7888 return TRUE;
7889 }
7890
7891 /* Determine the type of stub needed, if any, for a call. */
7892
7893 static inline enum ppc_stub_type
7894 ppc_type_of_stub (asection *input_sec,
7895 const Elf_Internal_Rela *rel,
7896 struct ppc_link_hash_entry **hash,
7897 bfd_vma destination)
7898 {
7899 struct ppc_link_hash_entry *h = *hash;
7900 bfd_vma location;
7901 bfd_vma branch_offset;
7902 bfd_vma max_branch_offset;
7903 enum elf_ppc64_reloc_type r_type;
7904
7905 if (h != NULL)
7906 {
7907 struct ppc_link_hash_entry *fdh = h;
7908 if (fdh->oh != NULL
7909 && fdh->oh->is_func_descriptor)
7910 fdh = fdh->oh;
7911
7912 if (fdh->elf.dynindx != -1)
7913 {
7914 struct plt_entry *ent;
7915
7916 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
7917 if (ent->addend == rel->r_addend
7918 && ent->plt.offset != (bfd_vma) -1)
7919 {
7920 *hash = fdh;
7921 return ppc_stub_plt_call;
7922 }
7923 }
7924
7925 /* Here, we know we don't have a plt entry. If we don't have a
7926 either a defined function descriptor or a defined entry symbol
7927 in a regular object file, then it is pointless trying to make
7928 any other type of stub. */
7929 if (!((fdh->elf.root.type == bfd_link_hash_defined
7930 || fdh->elf.root.type == bfd_link_hash_defweak)
7931 && fdh->elf.root.u.def.section->output_section != NULL)
7932 && !((h->elf.root.type == bfd_link_hash_defined
7933 || h->elf.root.type == bfd_link_hash_defweak)
7934 && h->elf.root.u.def.section->output_section != NULL))
7935 return ppc_stub_none;
7936 }
7937
7938 /* Determine where the call point is. */
7939 location = (input_sec->output_offset
7940 + input_sec->output_section->vma
7941 + rel->r_offset);
7942
7943 branch_offset = destination - location;
7944 r_type = ELF64_R_TYPE (rel->r_info);
7945
7946 /* Determine if a long branch stub is needed. */
7947 max_branch_offset = 1 << 25;
7948 if (r_type != R_PPC64_REL24)
7949 max_branch_offset = 1 << 15;
7950
7951 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7952 /* We need a stub. Figure out whether a long_branch or plt_branch
7953 is needed later. */
7954 return ppc_stub_long_branch;
7955
7956 return ppc_stub_none;
7957 }
7958
7959 /* Build a .plt call stub. */
7960
7961 static inline bfd_byte *
7962 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7963 {
7964 #define PPC_LO(v) ((v) & 0xffff)
7965 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7966 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7967
7968 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7969 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7970 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7971 if (PPC_HA (offset + 8) != PPC_HA (offset))
7972 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7973 offset += 8;
7974 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7975 if (PPC_HA (offset + 8) != PPC_HA (offset))
7976 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7977 offset += 8;
7978 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7979 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7980 bfd_put_32 (obfd, BCTR, p), p += 4;
7981 return p;
7982 }
7983
7984 static bfd_boolean
7985 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7986 {
7987 struct ppc_stub_hash_entry *stub_entry;
7988 struct ppc_branch_hash_entry *br_entry;
7989 struct bfd_link_info *info;
7990 struct ppc_link_hash_table *htab;
7991 bfd_byte *loc;
7992 bfd_byte *p;
7993 unsigned int indx;
7994 struct plt_entry *ent;
7995 bfd_vma dest, off;
7996 int size;
7997
7998 /* Massage our args to the form they really have. */
7999 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8000 info = in_arg;
8001
8002 htab = ppc_hash_table (info);
8003
8004 /* Make a note of the offset within the stubs for this entry. */
8005 stub_entry->stub_offset = stub_entry->stub_sec->size;
8006 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8007
8008 htab->stub_count[stub_entry->stub_type - 1] += 1;
8009 switch (stub_entry->stub_type)
8010 {
8011 case ppc_stub_long_branch:
8012 case ppc_stub_long_branch_r2off:
8013 /* Branches are relative. This is where we are going to. */
8014 off = dest = (stub_entry->target_value
8015 + stub_entry->target_section->output_offset
8016 + stub_entry->target_section->output_section->vma);
8017
8018 /* And this is where we are coming from. */
8019 off -= (stub_entry->stub_offset
8020 + stub_entry->stub_sec->output_offset
8021 + stub_entry->stub_sec->output_section->vma);
8022
8023 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8024 size = 4;
8025 else
8026 {
8027 bfd_vma r2off;
8028
8029 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8030 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8031 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8032 loc += 4;
8033 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8034 loc += 4;
8035 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8036 loc += 4;
8037 off -= 12;
8038 size = 16;
8039 }
8040 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8041
8042 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8043 {
8044 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8045 stub_entry->root.string);
8046 htab->stub_error = TRUE;
8047 return FALSE;
8048 }
8049
8050 if (info->emitrelocations)
8051 {
8052 Elf_Internal_Rela *relocs, *r;
8053 struct bfd_elf_section_data *elfsec_data;
8054
8055 elfsec_data = elf_section_data (stub_entry->stub_sec);
8056 relocs = elfsec_data->relocs;
8057 if (relocs == NULL)
8058 {
8059 bfd_size_type relsize;
8060 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8061 relocs = bfd_alloc (htab->stub_bfd, relsize);
8062 if (relocs == NULL)
8063 return FALSE;
8064 elfsec_data->relocs = relocs;
8065 elfsec_data->rel_hdr.sh_size = relsize;
8066 elfsec_data->rel_hdr.sh_entsize = 24;
8067 stub_entry->stub_sec->reloc_count = 0;
8068 }
8069 r = relocs + stub_entry->stub_sec->reloc_count;
8070 stub_entry->stub_sec->reloc_count += 1;
8071 r->r_offset = loc - stub_entry->stub_sec->contents;
8072 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8073 r->r_addend = dest;
8074 if (stub_entry->h != NULL)
8075 {
8076 struct elf_link_hash_entry **hashes;
8077 unsigned long symndx;
8078 struct ppc_link_hash_entry *h;
8079
8080 hashes = elf_sym_hashes (htab->stub_bfd);
8081 if (hashes == NULL)
8082 {
8083 bfd_size_type hsize;
8084
8085 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8086 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8087 if (hashes == NULL)
8088 return FALSE;
8089 elf_sym_hashes (htab->stub_bfd) = hashes;
8090 htab->stub_globals = 1;
8091 }
8092 symndx = htab->stub_globals++;
8093 h = stub_entry->h;
8094 hashes[symndx] = &h->elf;
8095 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8096 if (h->oh != NULL && h->oh->is_func)
8097 h = h->oh;
8098 if (h->elf.root.u.def.section != stub_entry->target_section)
8099 /* H is an opd symbol. The addend must be zero. */
8100 r->r_addend = 0;
8101 else
8102 {
8103 off = (h->elf.root.u.def.value
8104 + h->elf.root.u.def.section->output_offset
8105 + h->elf.root.u.def.section->output_section->vma);
8106 r->r_addend -= off;
8107 }
8108 }
8109 }
8110 break;
8111
8112 case ppc_stub_plt_branch:
8113 case ppc_stub_plt_branch_r2off:
8114 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8115 stub_entry->root.string + 9,
8116 FALSE, FALSE);
8117 if (br_entry == NULL)
8118 {
8119 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8120 stub_entry->root.string);
8121 htab->stub_error = TRUE;
8122 return FALSE;
8123 }
8124
8125 off = (stub_entry->target_value
8126 + stub_entry->target_section->output_offset
8127 + stub_entry->target_section->output_section->vma);
8128
8129 bfd_put_64 (htab->brlt->owner, off,
8130 htab->brlt->contents + br_entry->offset);
8131
8132 if (htab->relbrlt != NULL)
8133 {
8134 /* Create a reloc for the branch lookup table entry. */
8135 Elf_Internal_Rela rela;
8136 bfd_byte *rl;
8137
8138 rela.r_offset = (br_entry->offset
8139 + htab->brlt->output_offset
8140 + htab->brlt->output_section->vma);
8141 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8142 rela.r_addend = off;
8143
8144 rl = htab->relbrlt->contents;
8145 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8146 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8147 }
8148
8149 off = (br_entry->offset
8150 + htab->brlt->output_offset
8151 + htab->brlt->output_section->vma
8152 - elf_gp (htab->brlt->output_section->owner)
8153 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8154
8155 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8156 {
8157 (*_bfd_error_handler)
8158 (_("linkage table error against `%s'"),
8159 stub_entry->root.string);
8160 bfd_set_error (bfd_error_bad_value);
8161 htab->stub_error = TRUE;
8162 return FALSE;
8163 }
8164
8165 indx = off;
8166 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8167 {
8168 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8169 loc += 4;
8170 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8171 size = 16;
8172 }
8173 else
8174 {
8175 bfd_vma r2off;
8176
8177 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8178 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8179 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8180 loc += 4;
8181 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8182 loc += 4;
8183 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8184 loc += 4;
8185 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8186 loc += 4;
8187 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8188 size = 28;
8189 }
8190 loc += 4;
8191 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8192 loc += 4;
8193 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8194 break;
8195
8196 case ppc_stub_plt_call:
8197 /* Do the best we can for shared libraries built without
8198 exporting ".foo" for each "foo". This can happen when symbol
8199 versioning scripts strip all bar a subset of symbols. */
8200 if (stub_entry->h->oh != NULL
8201 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8202 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8203 {
8204 /* Point the symbol at the stub. There may be multiple stubs,
8205 we don't really care; The main thing is to make this sym
8206 defined somewhere. Maybe defining the symbol in the stub
8207 section is a silly idea. If we didn't do this, htab->top_id
8208 could disappear. */
8209 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8210 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8211 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8212 }
8213
8214 /* Now build the stub. */
8215 off = (bfd_vma) -1;
8216 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8217 if (ent->addend == stub_entry->addend)
8218 {
8219 off = ent->plt.offset;
8220 break;
8221 }
8222 if (off >= (bfd_vma) -2)
8223 abort ();
8224
8225 off &= ~ (bfd_vma) 1;
8226 off += (htab->plt->output_offset
8227 + htab->plt->output_section->vma
8228 - elf_gp (htab->plt->output_section->owner)
8229 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8230
8231 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8232 {
8233 (*_bfd_error_handler)
8234 (_("linkage table error against `%s'"),
8235 stub_entry->h->elf.root.root.string);
8236 bfd_set_error (bfd_error_bad_value);
8237 htab->stub_error = TRUE;
8238 return FALSE;
8239 }
8240
8241 p = build_plt_stub (htab->stub_bfd, loc, off);
8242 size = p - loc;
8243 break;
8244
8245 default:
8246 BFD_FAIL ();
8247 return FALSE;
8248 }
8249
8250 stub_entry->stub_sec->size += size;
8251
8252 if (htab->emit_stub_syms)
8253 {
8254 struct elf_link_hash_entry *h;
8255 size_t len1, len2;
8256 char *name;
8257 const char *const stub_str[] = { "long_branch",
8258 "long_branch_r2off",
8259 "plt_branch",
8260 "plt_branch_r2off",
8261 "plt_call" };
8262
8263 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8264 len2 = strlen (stub_entry->root.string);
8265 name = bfd_malloc (len1 + len2 + 2);
8266 if (name == NULL)
8267 return FALSE;
8268 memcpy (name, stub_entry->root.string, 9);
8269 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8270 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8271 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8272 if (h == NULL)
8273 return FALSE;
8274 if (h->root.type == bfd_link_hash_new)
8275 {
8276 h->root.type = bfd_link_hash_defined;
8277 h->root.u.def.section = stub_entry->stub_sec;
8278 h->root.u.def.value = stub_entry->stub_offset;
8279 h->ref_regular = 1;
8280 h->def_regular = 1;
8281 h->ref_regular_nonweak = 1;
8282 h->forced_local = 1;
8283 h->non_elf = 0;
8284 }
8285 }
8286
8287 return TRUE;
8288 }
8289
8290 /* As above, but don't actually build the stub. Just bump offset so
8291 we know stub section sizes, and select plt_branch stubs where
8292 long_branch stubs won't do. */
8293
8294 static bfd_boolean
8295 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8296 {
8297 struct ppc_stub_hash_entry *stub_entry;
8298 struct bfd_link_info *info;
8299 struct ppc_link_hash_table *htab;
8300 bfd_vma off;
8301 int size;
8302
8303 /* Massage our args to the form they really have. */
8304 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8305 info = in_arg;
8306
8307 htab = ppc_hash_table (info);
8308
8309 if (stub_entry->stub_type == ppc_stub_plt_call)
8310 {
8311 struct plt_entry *ent;
8312 off = (bfd_vma) -1;
8313 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8314 if (ent->addend == stub_entry->addend)
8315 {
8316 off = ent->plt.offset & ~(bfd_vma) 1;
8317 break;
8318 }
8319 if (off >= (bfd_vma) -2)
8320 abort ();
8321 off += (htab->plt->output_offset
8322 + htab->plt->output_section->vma
8323 - elf_gp (htab->plt->output_section->owner)
8324 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8325
8326 size = PLT_CALL_STUB_SIZE;
8327 if (PPC_HA (off + 16) != PPC_HA (off))
8328 size += 4;
8329 }
8330 else
8331 {
8332 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8333 variants. */
8334 off = (stub_entry->target_value
8335 + stub_entry->target_section->output_offset
8336 + stub_entry->target_section->output_section->vma);
8337 off -= (stub_entry->stub_sec->size
8338 + stub_entry->stub_sec->output_offset
8339 + stub_entry->stub_sec->output_section->vma);
8340
8341 /* Reset the stub type from the plt variant in case we now
8342 can reach with a shorter stub. */
8343 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8344 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8345
8346 size = 4;
8347 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8348 {
8349 off -= 12;
8350 size = 16;
8351 }
8352
8353 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8354 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8355 {
8356 struct ppc_branch_hash_entry *br_entry;
8357
8358 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8359 stub_entry->root.string + 9,
8360 TRUE, FALSE);
8361 if (br_entry == NULL)
8362 {
8363 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8364 stub_entry->root.string);
8365 htab->stub_error = TRUE;
8366 return FALSE;
8367 }
8368
8369 if (br_entry->iter != htab->stub_iteration)
8370 {
8371 br_entry->iter = htab->stub_iteration;
8372 br_entry->offset = htab->brlt->size;
8373 htab->brlt->size += 8;
8374
8375 if (htab->relbrlt != NULL)
8376 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8377 }
8378
8379 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8380 size = 16;
8381 if (stub_entry->stub_type != ppc_stub_plt_branch)
8382 size = 28;
8383 }
8384
8385 if (info->emitrelocations
8386 && (stub_entry->stub_type == ppc_stub_long_branch
8387 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8388 stub_entry->stub_sec->reloc_count += 1;
8389 }
8390
8391 stub_entry->stub_sec->size += size;
8392 return TRUE;
8393 }
8394
8395 /* Set up various things so that we can make a list of input sections
8396 for each output section included in the link. Returns -1 on error,
8397 0 when no stubs will be needed, and 1 on success. */
8398
8399 int
8400 ppc64_elf_setup_section_lists (bfd *output_bfd,
8401 struct bfd_link_info *info,
8402 int no_multi_toc)
8403 {
8404 bfd *input_bfd;
8405 int top_id, top_index, id;
8406 asection *section;
8407 asection **input_list;
8408 bfd_size_type amt;
8409 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8410
8411 htab->no_multi_toc = no_multi_toc;
8412
8413 if (htab->brlt == NULL)
8414 return 0;
8415
8416 /* Find the top input section id. */
8417 for (input_bfd = info->input_bfds, top_id = 3;
8418 input_bfd != NULL;
8419 input_bfd = input_bfd->link_next)
8420 {
8421 for (section = input_bfd->sections;
8422 section != NULL;
8423 section = section->next)
8424 {
8425 if (top_id < section->id)
8426 top_id = section->id;
8427 }
8428 }
8429
8430 htab->top_id = top_id;
8431 amt = sizeof (struct map_stub) * (top_id + 1);
8432 htab->stub_group = bfd_zmalloc (amt);
8433 if (htab->stub_group == NULL)
8434 return -1;
8435
8436 /* Set toc_off for com, und, abs and ind sections. */
8437 for (id = 0; id < 3; id++)
8438 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8439
8440 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8441
8442 /* We can't use output_bfd->section_count here to find the top output
8443 section index as some sections may have been removed, and
8444 strip_excluded_output_sections doesn't renumber the indices. */
8445 for (section = output_bfd->sections, top_index = 0;
8446 section != NULL;
8447 section = section->next)
8448 {
8449 if (top_index < section->index)
8450 top_index = section->index;
8451 }
8452
8453 htab->top_index = top_index;
8454 amt = sizeof (asection *) * (top_index + 1);
8455 input_list = bfd_zmalloc (amt);
8456 htab->input_list = input_list;
8457 if (input_list == NULL)
8458 return -1;
8459
8460 return 1;
8461 }
8462
8463 /* The linker repeatedly calls this function for each TOC input section
8464 and linker generated GOT section. Group input bfds such that the toc
8465 within a group is less than 64k in size. Will break with cute linker
8466 scripts that play games with dot in the output toc section. */
8467
8468 void
8469 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8470 {
8471 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8472
8473 if (!htab->no_multi_toc)
8474 {
8475 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8476 bfd_vma off = addr - htab->toc_curr;
8477
8478 if (off + isec->size > 0x10000)
8479 htab->toc_curr = addr;
8480
8481 elf_gp (isec->owner) = (htab->toc_curr
8482 - elf_gp (isec->output_section->owner)
8483 + TOC_BASE_OFF);
8484 }
8485 }
8486
8487 /* Called after the last call to the above function. */
8488
8489 void
8490 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8491 {
8492 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8493
8494 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8495
8496 /* toc_curr tracks the TOC offset used for code sections below in
8497 ppc64_elf_next_input_section. Start off at 0x8000. */
8498 htab->toc_curr = TOC_BASE_OFF;
8499 }
8500
8501 /* No toc references were found in ISEC. If the code in ISEC makes no
8502 calls, then there's no need to use toc adjusting stubs when branching
8503 into ISEC. Actually, indirect calls from ISEC are OK as they will
8504 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8505 needed, and 2 if a cyclical call-graph was found but no other reason
8506 for a stub was detected. If called from the top level, a return of
8507 2 means the same as a return of 0. */
8508
8509 static int
8510 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8511 {
8512 Elf_Internal_Rela *relstart, *rel;
8513 Elf_Internal_Sym *local_syms;
8514 int ret;
8515 struct ppc_link_hash_table *htab;
8516
8517 /* We know none of our code bearing sections will need toc stubs. */
8518 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8519 return 0;
8520
8521 if (isec->size == 0)
8522 return 0;
8523
8524 if (isec->output_section == NULL)
8525 return 0;
8526
8527 /* Hack for linux kernel. .fixup contains branches, but only back to
8528 the function that hit an exception. */
8529 if (strcmp (isec->name, ".fixup") == 0)
8530 return 0;
8531
8532 if (isec->reloc_count == 0)
8533 return 0;
8534
8535 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8536 info->keep_memory);
8537 if (relstart == NULL)
8538 return -1;
8539
8540 /* Look for branches to outside of this section. */
8541 local_syms = NULL;
8542 ret = 0;
8543 htab = ppc_hash_table (info);
8544 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8545 {
8546 enum elf_ppc64_reloc_type r_type;
8547 unsigned long r_symndx;
8548 struct elf_link_hash_entry *h;
8549 Elf_Internal_Sym *sym;
8550 asection *sym_sec;
8551 long *opd_adjust;
8552 bfd_vma sym_value;
8553 bfd_vma dest;
8554
8555 r_type = ELF64_R_TYPE (rel->r_info);
8556 if (r_type != R_PPC64_REL24
8557 && r_type != R_PPC64_REL14
8558 && r_type != R_PPC64_REL14_BRTAKEN
8559 && r_type != R_PPC64_REL14_BRNTAKEN)
8560 continue;
8561
8562 r_symndx = ELF64_R_SYM (rel->r_info);
8563 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8564 isec->owner))
8565 {
8566 ret = -1;
8567 break;
8568 }
8569
8570 /* Calls to dynamic lib functions go through a plt call stub
8571 that uses r2. Branches to undefined symbols might be a call
8572 using old-style dot symbols that can be satisfied by a plt
8573 call into a new-style dynamic library. */
8574 if (sym_sec == NULL)
8575 {
8576 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8577 if (eh != NULL
8578 && eh->oh != NULL
8579 && eh->oh->elf.plt.plist != NULL)
8580 {
8581 ret = 1;
8582 break;
8583 }
8584
8585 /* Ignore other undefined symbols. */
8586 continue;
8587 }
8588
8589 /* Assume branches to other sections not included in the link need
8590 stubs too, to cover -R and absolute syms. */
8591 if (sym_sec->output_section == NULL)
8592 {
8593 ret = 1;
8594 break;
8595 }
8596
8597 if (h == NULL)
8598 sym_value = sym->st_value;
8599 else
8600 {
8601 if (h->root.type != bfd_link_hash_defined
8602 && h->root.type != bfd_link_hash_defweak)
8603 abort ();
8604 sym_value = h->root.u.def.value;
8605 }
8606 sym_value += rel->r_addend;
8607
8608 /* If this branch reloc uses an opd sym, find the code section. */
8609 opd_adjust = get_opd_info (sym_sec);
8610 if (opd_adjust != NULL)
8611 {
8612 if (h == NULL)
8613 {
8614 long adjust;
8615
8616 adjust = opd_adjust[sym->st_value / 8];
8617 if (adjust == -1)
8618 /* Assume deleted functions won't ever be called. */
8619 continue;
8620 sym_value += adjust;
8621 }
8622
8623 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8624 if (dest == (bfd_vma) -1)
8625 continue;
8626 }
8627 else
8628 dest = (sym_value
8629 + sym_sec->output_offset
8630 + sym_sec->output_section->vma);
8631
8632 /* Ignore branch to self. */
8633 if (sym_sec == isec)
8634 continue;
8635
8636 /* If the called function uses the toc, we need a stub. */
8637 if (sym_sec->has_toc_reloc
8638 || sym_sec->makes_toc_func_call)
8639 {
8640 ret = 1;
8641 break;
8642 }
8643
8644 /* Assume any branch that needs a long branch stub might in fact
8645 need a plt_branch stub. A plt_branch stub uses r2. */
8646 else if (dest - (isec->output_offset
8647 + isec->output_section->vma
8648 + rel->r_offset) + (1 << 25) >= (2 << 25))
8649 {
8650 ret = 1;
8651 break;
8652 }
8653
8654 /* If calling back to a section in the process of being tested, we
8655 can't say for sure that no toc adjusting stubs are needed, so
8656 don't return zero. */
8657 else if (sym_sec->call_check_in_progress)
8658 ret = 2;
8659
8660 /* Branches to another section that itself doesn't have any TOC
8661 references are OK. Recursively call ourselves to check. */
8662 else if (sym_sec->id <= htab->top_id
8663 && htab->stub_group[sym_sec->id].toc_off == 0)
8664 {
8665 int recur;
8666
8667 /* Mark current section as indeterminate, so that other
8668 sections that call back to current won't be marked as
8669 known. */
8670 isec->call_check_in_progress = 1;
8671 recur = toc_adjusting_stub_needed (info, sym_sec);
8672 isec->call_check_in_progress = 0;
8673
8674 if (recur < 0)
8675 {
8676 /* An error. Exit. */
8677 ret = -1;
8678 break;
8679 }
8680 else if (recur <= 1)
8681 {
8682 /* Known result. Mark as checked and set section flag. */
8683 htab->stub_group[sym_sec->id].toc_off = 1;
8684 if (recur != 0)
8685 {
8686 sym_sec->makes_toc_func_call = 1;
8687 ret = 1;
8688 break;
8689 }
8690 }
8691 else
8692 {
8693 /* Unknown result. Continue checking. */
8694 ret = 2;
8695 }
8696 }
8697 }
8698
8699 if (local_syms != NULL
8700 && (elf_tdata (isec->owner)->symtab_hdr.contents
8701 != (unsigned char *) local_syms))
8702 free (local_syms);
8703 if (elf_section_data (isec)->relocs != relstart)
8704 free (relstart);
8705
8706 return ret;
8707 }
8708
8709 /* The linker repeatedly calls this function for each input section,
8710 in the order that input sections are linked into output sections.
8711 Build lists of input sections to determine groupings between which
8712 we may insert linker stubs. */
8713
8714 bfd_boolean
8715 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8716 {
8717 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8718
8719 if ((isec->output_section->flags & SEC_CODE) != 0
8720 && isec->output_section->index <= htab->top_index)
8721 {
8722 asection **list = htab->input_list + isec->output_section->index;
8723 /* Steal the link_sec pointer for our list. */
8724 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8725 /* This happens to make the list in reverse order,
8726 which is what we want. */
8727 PREV_SEC (isec) = *list;
8728 *list = isec;
8729 }
8730
8731 if (htab->multi_toc_needed)
8732 {
8733 /* If a code section has a function that uses the TOC then we need
8734 to use the right TOC (obviously). Also, make sure that .opd gets
8735 the correct TOC value for R_PPC64_TOC relocs that don't have or
8736 can't find their function symbol (shouldn't ever happen now). */
8737 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8738 {
8739 if (elf_gp (isec->owner) != 0)
8740 htab->toc_curr = elf_gp (isec->owner);
8741 }
8742 else if (htab->stub_group[isec->id].toc_off == 0)
8743 {
8744 int ret = toc_adjusting_stub_needed (info, isec);
8745 if (ret < 0)
8746 return FALSE;
8747 else
8748 isec->makes_toc_func_call = ret & 1;
8749 }
8750 }
8751
8752 /* Functions that don't use the TOC can belong in any TOC group.
8753 Use the last TOC base. This happens to make _init and _fini
8754 pasting work. */
8755 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8756 return TRUE;
8757 }
8758
8759 /* See whether we can group stub sections together. Grouping stub
8760 sections may result in fewer stubs. More importantly, we need to
8761 put all .init* and .fini* stubs at the beginning of the .init or
8762 .fini output sections respectively, because glibc splits the
8763 _init and _fini functions into multiple parts. Putting a stub in
8764 the middle of a function is not a good idea. */
8765
8766 static void
8767 group_sections (struct ppc_link_hash_table *htab,
8768 bfd_size_type stub_group_size,
8769 bfd_boolean stubs_always_before_branch)
8770 {
8771 asection **list = htab->input_list + htab->top_index;
8772 do
8773 {
8774 asection *tail = *list;
8775 while (tail != NULL)
8776 {
8777 asection *curr;
8778 asection *prev;
8779 bfd_size_type total;
8780 bfd_boolean big_sec;
8781 bfd_vma curr_toc;
8782
8783 curr = tail;
8784 total = tail->size;
8785 big_sec = total > stub_group_size;
8786 if (big_sec)
8787 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
8788 tail->owner, tail);
8789 curr_toc = htab->stub_group[tail->id].toc_off;
8790
8791 while ((prev = PREV_SEC (curr)) != NULL
8792 && ((total += curr->output_offset - prev->output_offset)
8793 < stub_group_size)
8794 && htab->stub_group[prev->id].toc_off == curr_toc)
8795 curr = prev;
8796
8797 /* OK, the size from the start of CURR to the end is less
8798 than stub_group_size and thus can be handled by one stub
8799 section. (or the tail section is itself larger than
8800 stub_group_size, in which case we may be toast.) We
8801 should really be keeping track of the total size of stubs
8802 added here, as stubs contribute to the final output
8803 section size. That's a little tricky, and this way will
8804 only break if stubs added make the total size more than
8805 2^25, ie. for the default stub_group_size, if stubs total
8806 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8807 do
8808 {
8809 prev = PREV_SEC (tail);
8810 /* Set up this stub group. */
8811 htab->stub_group[tail->id].link_sec = curr;
8812 }
8813 while (tail != curr && (tail = prev) != NULL);
8814
8815 /* But wait, there's more! Input sections up to stub_group_size
8816 bytes before the stub section can be handled by it too.
8817 Don't do this if we have a really large section after the
8818 stubs, as adding more stubs increases the chance that
8819 branches may not reach into the stub section. */
8820 if (!stubs_always_before_branch && !big_sec)
8821 {
8822 total = 0;
8823 while (prev != NULL
8824 && ((total += tail->output_offset - prev->output_offset)
8825 < stub_group_size)
8826 && htab->stub_group[prev->id].toc_off == curr_toc)
8827 {
8828 tail = prev;
8829 prev = PREV_SEC (tail);
8830 htab->stub_group[tail->id].link_sec = curr;
8831 }
8832 }
8833 tail = prev;
8834 }
8835 }
8836 while (list-- != htab->input_list);
8837 free (htab->input_list);
8838 #undef PREV_SEC
8839 }
8840
8841 /* Determine and set the size of the stub section for a final link.
8842
8843 The basic idea here is to examine all the relocations looking for
8844 PC-relative calls to a target that is unreachable with a "bl"
8845 instruction. */
8846
8847 bfd_boolean
8848 ppc64_elf_size_stubs (bfd *output_bfd,
8849 struct bfd_link_info *info,
8850 bfd_signed_vma group_size,
8851 asection *(*add_stub_section) (const char *, asection *),
8852 void (*layout_sections_again) (void))
8853 {
8854 bfd_size_type stub_group_size;
8855 bfd_boolean stubs_always_before_branch;
8856 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8857
8858 /* Stash our params away. */
8859 htab->add_stub_section = add_stub_section;
8860 htab->layout_sections_again = layout_sections_again;
8861 stubs_always_before_branch = group_size < 0;
8862 if (group_size < 0)
8863 stub_group_size = -group_size;
8864 else
8865 stub_group_size = group_size;
8866 if (stub_group_size == 1)
8867 {
8868 /* Default values. */
8869 if (stubs_always_before_branch)
8870 {
8871 stub_group_size = 0x1e00000;
8872 if (htab->has_14bit_branch)
8873 stub_group_size = 0x7800;
8874 }
8875 else
8876 {
8877 stub_group_size = 0x1c00000;
8878 if (htab->has_14bit_branch)
8879 stub_group_size = 0x7000;
8880 }
8881 }
8882
8883 group_sections (htab, stub_group_size, stubs_always_before_branch);
8884
8885 while (1)
8886 {
8887 bfd *input_bfd;
8888 unsigned int bfd_indx;
8889 asection *stub_sec;
8890
8891 htab->stub_iteration += 1;
8892
8893 for (input_bfd = info->input_bfds, bfd_indx = 0;
8894 input_bfd != NULL;
8895 input_bfd = input_bfd->link_next, bfd_indx++)
8896 {
8897 Elf_Internal_Shdr *symtab_hdr;
8898 asection *section;
8899 Elf_Internal_Sym *local_syms = NULL;
8900
8901 /* We'll need the symbol table in a second. */
8902 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8903 if (symtab_hdr->sh_info == 0)
8904 continue;
8905
8906 /* Walk over each section attached to the input bfd. */
8907 for (section = input_bfd->sections;
8908 section != NULL;
8909 section = section->next)
8910 {
8911 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8912
8913 /* If there aren't any relocs, then there's nothing more
8914 to do. */
8915 if ((section->flags & SEC_RELOC) == 0
8916 || section->reloc_count == 0)
8917 continue;
8918
8919 /* If this section is a link-once section that will be
8920 discarded, then don't create any stubs. */
8921 if (section->output_section == NULL
8922 || section->output_section->owner != output_bfd)
8923 continue;
8924
8925 /* Get the relocs. */
8926 internal_relocs
8927 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8928 info->keep_memory);
8929 if (internal_relocs == NULL)
8930 goto error_ret_free_local;
8931
8932 /* Now examine each relocation. */
8933 irela = internal_relocs;
8934 irelaend = irela + section->reloc_count;
8935 for (; irela < irelaend; irela++)
8936 {
8937 enum elf_ppc64_reloc_type r_type;
8938 unsigned int r_indx;
8939 enum ppc_stub_type stub_type;
8940 struct ppc_stub_hash_entry *stub_entry;
8941 asection *sym_sec, *code_sec;
8942 bfd_vma sym_value;
8943 bfd_vma destination;
8944 bfd_boolean ok_dest;
8945 struct ppc_link_hash_entry *hash;
8946 struct ppc_link_hash_entry *fdh;
8947 struct elf_link_hash_entry *h;
8948 Elf_Internal_Sym *sym;
8949 char *stub_name;
8950 const asection *id_sec;
8951 long *opd_adjust;
8952
8953 r_type = ELF64_R_TYPE (irela->r_info);
8954 r_indx = ELF64_R_SYM (irela->r_info);
8955
8956 if (r_type >= R_PPC64_max)
8957 {
8958 bfd_set_error (bfd_error_bad_value);
8959 goto error_ret_free_internal;
8960 }
8961
8962 /* Only look for stubs on branch instructions. */
8963 if (r_type != R_PPC64_REL24
8964 && r_type != R_PPC64_REL14
8965 && r_type != R_PPC64_REL14_BRTAKEN
8966 && r_type != R_PPC64_REL14_BRNTAKEN)
8967 continue;
8968
8969 /* Now determine the call target, its name, value,
8970 section. */
8971 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8972 r_indx, input_bfd))
8973 goto error_ret_free_internal;
8974 hash = (struct ppc_link_hash_entry *) h;
8975
8976 ok_dest = FALSE;
8977 fdh = NULL;
8978 sym_value = 0;
8979 if (hash == NULL)
8980 {
8981 sym_value = sym->st_value;
8982 ok_dest = TRUE;
8983 }
8984 else if (hash->elf.root.type == bfd_link_hash_defined
8985 || hash->elf.root.type == bfd_link_hash_defweak)
8986 {
8987 sym_value = hash->elf.root.u.def.value;
8988 if (sym_sec->output_section != NULL)
8989 ok_dest = TRUE;
8990 }
8991 else if (hash->elf.root.type == bfd_link_hash_undefweak
8992 || hash->elf.root.type == bfd_link_hash_undefined)
8993 {
8994 /* Recognise an old ABI func code entry sym, and
8995 use the func descriptor sym instead if it is
8996 defined. */
8997 if (hash->elf.root.root.string[0] == '.'
8998 && (fdh = get_fdh (hash, htab)) != NULL)
8999 {
9000 if (fdh->elf.root.type == bfd_link_hash_defined
9001 || fdh->elf.root.type == bfd_link_hash_defweak)
9002 {
9003 sym_sec = fdh->elf.root.u.def.section;
9004 sym_value = fdh->elf.root.u.def.value;
9005 if (sym_sec->output_section != NULL)
9006 ok_dest = TRUE;
9007 }
9008 else
9009 fdh = NULL;
9010 }
9011 }
9012 else
9013 {
9014 bfd_set_error (bfd_error_bad_value);
9015 goto error_ret_free_internal;
9016 }
9017
9018 destination = 0;
9019 if (ok_dest)
9020 {
9021 sym_value += irela->r_addend;
9022 destination = (sym_value
9023 + sym_sec->output_offset
9024 + sym_sec->output_section->vma);
9025 }
9026
9027 code_sec = sym_sec;
9028 opd_adjust = get_opd_info (sym_sec);
9029 if (opd_adjust != NULL)
9030 {
9031 bfd_vma dest;
9032
9033 if (hash == NULL)
9034 {
9035 long adjust = opd_adjust[sym_value / 8];
9036 if (adjust == -1)
9037 continue;
9038 sym_value += adjust;
9039 }
9040 dest = opd_entry_value (sym_sec, sym_value,
9041 &code_sec, &sym_value);
9042 if (dest != (bfd_vma) -1)
9043 {
9044 destination = dest;
9045 if (fdh != NULL)
9046 {
9047 /* Fixup old ABI sym to point at code
9048 entry. */
9049 hash->elf.root.type = bfd_link_hash_defweak;
9050 hash->elf.root.u.def.section = code_sec;
9051 hash->elf.root.u.def.value = sym_value;
9052 }
9053 }
9054 }
9055
9056 /* Determine what (if any) linker stub is needed. */
9057 stub_type = ppc_type_of_stub (section, irela, &hash,
9058 destination);
9059
9060 if (stub_type != ppc_stub_plt_call)
9061 {
9062 /* Check whether we need a TOC adjusting stub.
9063 Since the linker pastes together pieces from
9064 different object files when creating the
9065 _init and _fini functions, it may be that a
9066 call to what looks like a local sym is in
9067 fact a call needing a TOC adjustment. */
9068 if (code_sec != NULL
9069 && code_sec->output_section != NULL
9070 && (htab->stub_group[code_sec->id].toc_off
9071 != htab->stub_group[section->id].toc_off)
9072 && (code_sec->has_toc_reloc
9073 || code_sec->makes_toc_func_call))
9074 stub_type = ppc_stub_long_branch_r2off;
9075 }
9076
9077 if (stub_type == ppc_stub_none)
9078 continue;
9079
9080 /* __tls_get_addr calls might be eliminated. */
9081 if (stub_type != ppc_stub_plt_call
9082 && hash != NULL
9083 && (hash == htab->tls_get_addr
9084 || hash == htab->tls_get_addr_fd)
9085 && section->has_tls_reloc
9086 && irela != internal_relocs)
9087 {
9088 /* Get tls info. */
9089 char *tls_mask;
9090
9091 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9092 irela - 1, input_bfd))
9093 goto error_ret_free_internal;
9094 if (*tls_mask != 0)
9095 continue;
9096 }
9097
9098 /* Support for grouping stub sections. */
9099 id_sec = htab->stub_group[section->id].link_sec;
9100
9101 /* Get the name of this stub. */
9102 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9103 if (!stub_name)
9104 goto error_ret_free_internal;
9105
9106 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9107 stub_name, FALSE, FALSE);
9108 if (stub_entry != NULL)
9109 {
9110 /* The proper stub has already been created. */
9111 free (stub_name);
9112 continue;
9113 }
9114
9115 stub_entry = ppc_add_stub (stub_name, section, htab);
9116 if (stub_entry == NULL)
9117 {
9118 free (stub_name);
9119 error_ret_free_internal:
9120 if (elf_section_data (section)->relocs == NULL)
9121 free (internal_relocs);
9122 error_ret_free_local:
9123 if (local_syms != NULL
9124 && (symtab_hdr->contents
9125 != (unsigned char *) local_syms))
9126 free (local_syms);
9127 return FALSE;
9128 }
9129
9130 stub_entry->stub_type = stub_type;
9131 stub_entry->target_value = sym_value;
9132 stub_entry->target_section = code_sec;
9133 stub_entry->h = hash;
9134 stub_entry->addend = irela->r_addend;
9135
9136 if (stub_entry->h != NULL)
9137 htab->stub_globals += 1;
9138 }
9139
9140 /* We're done with the internal relocs, free them. */
9141 if (elf_section_data (section)->relocs != internal_relocs)
9142 free (internal_relocs);
9143 }
9144
9145 if (local_syms != NULL
9146 && symtab_hdr->contents != (unsigned char *) local_syms)
9147 {
9148 if (!info->keep_memory)
9149 free (local_syms);
9150 else
9151 symtab_hdr->contents = (unsigned char *) local_syms;
9152 }
9153 }
9154
9155 /* We may have added some stubs. Find out the new size of the
9156 stub sections. */
9157 for (stub_sec = htab->stub_bfd->sections;
9158 stub_sec != NULL;
9159 stub_sec = stub_sec->next)
9160 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9161 {
9162 stub_sec->rawsize = stub_sec->size;
9163 stub_sec->size = 0;
9164 stub_sec->reloc_count = 0;
9165 }
9166
9167 htab->brlt->size = 0;
9168 if (htab->relbrlt != NULL)
9169 htab->relbrlt->size = 0;
9170
9171 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9172
9173 for (stub_sec = htab->stub_bfd->sections;
9174 stub_sec != NULL;
9175 stub_sec = stub_sec->next)
9176 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9177 && stub_sec->rawsize != stub_sec->size)
9178 break;
9179
9180 /* Exit from this loop when no stubs have been added, and no stubs
9181 have changed size. */
9182 if (stub_sec == NULL)
9183 break;
9184
9185 /* Ask the linker to do its stuff. */
9186 (*htab->layout_sections_again) ();
9187 }
9188
9189 /* It would be nice to strip htab->brlt from the output if the
9190 section is empty, but it's too late. If we strip sections here,
9191 the dynamic symbol table is corrupted since the section symbol
9192 for the stripped section isn't written. */
9193
9194 return TRUE;
9195 }
9196
9197 /* Called after we have determined section placement. If sections
9198 move, we'll be called again. Provide a value for TOCstart. */
9199
9200 bfd_vma
9201 ppc64_elf_toc (bfd *obfd)
9202 {
9203 asection *s;
9204 bfd_vma TOCstart;
9205
9206 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9207 order. The TOC starts where the first of these sections starts. */
9208 s = bfd_get_section_by_name (obfd, ".got");
9209 if (s == NULL)
9210 s = bfd_get_section_by_name (obfd, ".toc");
9211 if (s == NULL)
9212 s = bfd_get_section_by_name (obfd, ".tocbss");
9213 if (s == NULL)
9214 s = bfd_get_section_by_name (obfd, ".plt");
9215 if (s == NULL)
9216 {
9217 /* This may happen for
9218 o references to TOC base (SYM@toc / TOC[tc0]) without a
9219 .toc directive
9220 o bad linker script
9221 o --gc-sections and empty TOC sections
9222
9223 FIXME: Warn user? */
9224
9225 /* Look for a likely section. We probably won't even be
9226 using TOCstart. */
9227 for (s = obfd->sections; s != NULL; s = s->next)
9228 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9229 == (SEC_ALLOC | SEC_SMALL_DATA))
9230 break;
9231 if (s == NULL)
9232 for (s = obfd->sections; s != NULL; s = s->next)
9233 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9234 == (SEC_ALLOC | SEC_SMALL_DATA))
9235 break;
9236 if (s == NULL)
9237 for (s = obfd->sections; s != NULL; s = s->next)
9238 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9239 break;
9240 if (s == NULL)
9241 for (s = obfd->sections; s != NULL; s = s->next)
9242 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9243 break;
9244 }
9245
9246 TOCstart = 0;
9247 if (s != NULL)
9248 TOCstart = s->output_section->vma + s->output_offset;
9249
9250 return TOCstart;
9251 }
9252
9253 /* Build all the stubs associated with the current output file.
9254 The stubs are kept in a hash table attached to the main linker
9255 hash table. This function is called via gldelf64ppc_finish. */
9256
9257 bfd_boolean
9258 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9259 struct bfd_link_info *info,
9260 char **stats)
9261 {
9262 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9263 asection *stub_sec;
9264 bfd_byte *p;
9265 int stub_sec_count = 0;
9266
9267 htab->emit_stub_syms = emit_stub_syms;
9268
9269 /* Allocate memory to hold the linker stubs. */
9270 for (stub_sec = htab->stub_bfd->sections;
9271 stub_sec != NULL;
9272 stub_sec = stub_sec->next)
9273 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9274 && stub_sec->size != 0)
9275 {
9276 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9277 if (stub_sec->contents == NULL)
9278 return FALSE;
9279 /* We want to check that built size is the same as calculated
9280 size. rawsize is a convenient location to use. */
9281 stub_sec->rawsize = stub_sec->size;
9282 stub_sec->size = 0;
9283 }
9284
9285 if (htab->plt != NULL)
9286 {
9287 unsigned int indx;
9288 bfd_vma plt0;
9289
9290 /* Build the .glink plt call stub. */
9291 plt0 = (htab->plt->output_section->vma
9292 + htab->plt->output_offset
9293 - (htab->glink->output_section->vma
9294 + htab->glink->output_offset
9295 + GLINK_CALL_STUB_SIZE));
9296 if (plt0 + 0x80008000 > 0xffffffff)
9297 {
9298 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9299 bfd_set_error (bfd_error_bad_value);
9300 return FALSE;
9301 }
9302
9303 if (htab->emit_stub_syms)
9304 {
9305 struct elf_link_hash_entry *h;
9306 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9307 if (h == NULL)
9308 return FALSE;
9309 if (h->root.type == bfd_link_hash_new)
9310 {
9311 h->root.type = bfd_link_hash_defined;
9312 h->root.u.def.section = htab->glink;
9313 h->root.u.def.value = 0;
9314 h->ref_regular = 1;
9315 h->def_regular = 1;
9316 h->ref_regular_nonweak = 1;
9317 h->forced_local = 1;
9318 h->non_elf = 0;
9319 }
9320 }
9321 p = htab->glink->contents;
9322 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9323 p += 4;
9324 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9325 p += 4;
9326 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9327 p += 4;
9328 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9329 p += 4;
9330 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9331 p += 4;
9332 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9333 p += 4;
9334 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9335 p += 4;
9336 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9337 p += 4;
9338 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9339 p += 4;
9340 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9341 p += 4;
9342 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9343 p += 4;
9344 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9345 p += 4;
9346 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9347 p += 4;
9348 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9349 p += 4;
9350 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9351 p += 4;
9352 bfd_put_32 (htab->glink->owner, BCTR, p);
9353 p += 4;
9354
9355 /* Build the .glink lazy link call stubs. */
9356 indx = 0;
9357 while (p < htab->glink->contents + htab->glink->size)
9358 {
9359 if (indx < 0x8000)
9360 {
9361 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9362 p += 4;
9363 }
9364 else
9365 {
9366 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9367 p += 4;
9368 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9369 p += 4;
9370 }
9371 bfd_put_32 (htab->glink->owner,
9372 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9373 indx++;
9374 p += 4;
9375 }
9376 htab->glink->rawsize = p - htab->glink->contents;
9377 }
9378
9379 if (htab->brlt->size != 0)
9380 {
9381 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9382 htab->brlt->size);
9383 if (htab->brlt->contents == NULL)
9384 return FALSE;
9385 }
9386 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9387 {
9388 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9389 htab->relbrlt->size);
9390 if (htab->relbrlt->contents == NULL)
9391 return FALSE;
9392 }
9393
9394 /* Build the stubs as directed by the stub hash table. */
9395 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9396
9397 for (stub_sec = htab->stub_bfd->sections;
9398 stub_sec != NULL;
9399 stub_sec = stub_sec->next)
9400 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9401 {
9402 stub_sec_count += 1;
9403 if (stub_sec->rawsize != stub_sec->size)
9404 break;
9405 }
9406
9407 if (stub_sec != NULL
9408 || htab->glink->rawsize != htab->glink->size)
9409 {
9410 htab->stub_error = TRUE;
9411 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9412 }
9413
9414 if (htab->stub_error)
9415 return FALSE;
9416
9417 if (stats != NULL)
9418 {
9419 *stats = bfd_malloc (500);
9420 if (*stats == NULL)
9421 return FALSE;
9422
9423 sprintf (*stats, _("linker stubs in %u group%s\n"
9424 " branch %lu\n"
9425 " toc adjust %lu\n"
9426 " long branch %lu\n"
9427 " long toc adj %lu\n"
9428 " plt call %lu"),
9429 stub_sec_count,
9430 stub_sec_count == 1 ? "" : "s",
9431 htab->stub_count[ppc_stub_long_branch - 1],
9432 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9433 htab->stub_count[ppc_stub_plt_branch - 1],
9434 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9435 htab->stub_count[ppc_stub_plt_call - 1]);
9436 }
9437 return TRUE;
9438 }
9439
9440 /* This function undoes the changes made by add_symbol_adjust. */
9441
9442 static bfd_boolean
9443 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9444 {
9445 struct ppc_link_hash_entry *eh;
9446
9447 if (h->root.type == bfd_link_hash_indirect)
9448 return TRUE;
9449
9450 if (h->root.type == bfd_link_hash_warning)
9451 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9452
9453 eh = (struct ppc_link_hash_entry *) h;
9454 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9455 return TRUE;
9456
9457 eh->elf.root.type = bfd_link_hash_undefined;
9458 return TRUE;
9459 }
9460
9461 void
9462 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9463 {
9464 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9465 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9466 }
9467
9468 /* What to do when ld finds relocations against symbols defined in
9469 discarded sections. */
9470
9471 static unsigned int
9472 ppc64_elf_action_discarded (asection *sec)
9473 {
9474 if (strcmp (".opd", sec->name) == 0)
9475 return 0;
9476
9477 if (strcmp (".toc", sec->name) == 0)
9478 return 0;
9479
9480 return _bfd_elf_default_action_discarded (sec);
9481 }
9482
9483 /* The RELOCATE_SECTION function is called by the ELF backend linker
9484 to handle the relocations for a section.
9485
9486 The relocs are always passed as Rela structures; if the section
9487 actually uses Rel structures, the r_addend field will always be
9488 zero.
9489
9490 This function is responsible for adjust the section contents as
9491 necessary, and (if using Rela relocs and generating a
9492 relocatable output file) adjusting the reloc addend as
9493 necessary.
9494
9495 This function does not have to worry about setting the reloc
9496 address or the reloc symbol index.
9497
9498 LOCAL_SYMS is a pointer to the swapped in local symbols.
9499
9500 LOCAL_SECTIONS is an array giving the section in the input file
9501 corresponding to the st_shndx field of each local symbol.
9502
9503 The global hash table entry for the global symbols can be found
9504 via elf_sym_hashes (input_bfd).
9505
9506 When generating relocatable output, this function must handle
9507 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9508 going to be the section symbol corresponding to the output
9509 section, which means that the addend must be adjusted
9510 accordingly. */
9511
9512 static bfd_boolean
9513 ppc64_elf_relocate_section (bfd *output_bfd,
9514 struct bfd_link_info *info,
9515 bfd *input_bfd,
9516 asection *input_section,
9517 bfd_byte *contents,
9518 Elf_Internal_Rela *relocs,
9519 Elf_Internal_Sym *local_syms,
9520 asection **local_sections)
9521 {
9522 struct ppc_link_hash_table *htab;
9523 Elf_Internal_Shdr *symtab_hdr;
9524 struct elf_link_hash_entry **sym_hashes;
9525 Elf_Internal_Rela *rel;
9526 Elf_Internal_Rela *relend;
9527 Elf_Internal_Rela outrel;
9528 bfd_byte *loc;
9529 struct got_entry **local_got_ents;
9530 bfd_vma TOCstart;
9531 bfd_boolean ret = TRUE;
9532 bfd_boolean is_opd;
9533 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9534 bfd_boolean is_power4 = FALSE;
9535
9536 if (info->relocatable)
9537 return TRUE;
9538
9539 /* Initialize howto table if needed. */
9540 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9541 ppc_howto_init ();
9542
9543 htab = ppc_hash_table (info);
9544
9545 /* Don't relocate stub sections. */
9546 if (input_section->owner == htab->stub_bfd)
9547 return TRUE;
9548
9549 local_got_ents = elf_local_got_ents (input_bfd);
9550 TOCstart = elf_gp (output_bfd);
9551 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9552 sym_hashes = elf_sym_hashes (input_bfd);
9553 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9554
9555 rel = relocs;
9556 relend = relocs + input_section->reloc_count;
9557 for (; rel < relend; rel++)
9558 {
9559 enum elf_ppc64_reloc_type r_type;
9560 bfd_vma addend;
9561 bfd_reloc_status_type r;
9562 Elf_Internal_Sym *sym;
9563 asection *sec;
9564 struct elf_link_hash_entry *h_elf;
9565 struct ppc_link_hash_entry *h;
9566 struct ppc_link_hash_entry *fdh;
9567 const char *sym_name;
9568 unsigned long r_symndx, toc_symndx;
9569 char tls_mask, tls_gd, tls_type;
9570 char sym_type;
9571 bfd_vma relocation;
9572 bfd_boolean unresolved_reloc;
9573 bfd_boolean warned;
9574 unsigned long insn, mask;
9575 struct ppc_stub_hash_entry *stub_entry;
9576 bfd_vma max_br_offset;
9577 bfd_vma from;
9578
9579 r_type = ELF64_R_TYPE (rel->r_info);
9580 r_symndx = ELF64_R_SYM (rel->r_info);
9581
9582 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9583 symbol of the previous ADDR64 reloc. The symbol gives us the
9584 proper TOC base to use. */
9585 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9586 && rel != relocs
9587 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9588 && is_opd)
9589 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9590
9591 sym = NULL;
9592 sec = NULL;
9593 h_elf = NULL;
9594 sym_name = NULL;
9595 unresolved_reloc = FALSE;
9596 warned = FALSE;
9597
9598 if (r_symndx < symtab_hdr->sh_info)
9599 {
9600 /* It's a local symbol. */
9601 long *opd_adjust;
9602
9603 sym = local_syms + r_symndx;
9604 sec = local_sections[r_symndx];
9605 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9606 sym_type = ELF64_ST_TYPE (sym->st_info);
9607 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9608 opd_adjust = get_opd_info (sec);
9609 if (opd_adjust != NULL)
9610 {
9611 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9612 if (adjust == -1)
9613 relocation = 0;
9614 else
9615 relocation += adjust;
9616 }
9617 }
9618 else
9619 {
9620 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9621 r_symndx, symtab_hdr, sym_hashes,
9622 h_elf, sec, relocation,
9623 unresolved_reloc, warned);
9624 sym_name = h_elf->root.root.string;
9625 sym_type = h_elf->type;
9626 }
9627 h = (struct ppc_link_hash_entry *) h_elf;
9628
9629 /* TLS optimizations. Replace instruction sequences and relocs
9630 based on information we collected in tls_optimize. We edit
9631 RELOCS so that --emit-relocs will output something sensible
9632 for the final instruction stream. */
9633 tls_mask = 0;
9634 tls_gd = 0;
9635 toc_symndx = 0;
9636 if (IS_PPC64_TLS_RELOC (r_type))
9637 {
9638 if (h != NULL)
9639 tls_mask = h->tls_mask;
9640 else if (local_got_ents != NULL)
9641 {
9642 char *lgot_masks;
9643 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9644 tls_mask = lgot_masks[r_symndx];
9645 }
9646 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9647 {
9648 /* Check for toc tls entries. */
9649 char *toc_tls;
9650
9651 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9652 rel, input_bfd))
9653 return FALSE;
9654
9655 if (toc_tls)
9656 tls_mask = *toc_tls;
9657 }
9658 }
9659
9660 /* Check that tls relocs are used with tls syms, and non-tls
9661 relocs are used with non-tls syms. */
9662 if (r_symndx != 0
9663 && r_type != R_PPC64_NONE
9664 && (h == NULL
9665 || h->elf.root.type == bfd_link_hash_defined
9666 || h->elf.root.type == bfd_link_hash_defweak)
9667 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9668 {
9669 if (r_type == R_PPC64_TLS && tls_mask != 0)
9670 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9671 ;
9672 else
9673 (*_bfd_error_handler)
9674 (sym_type == STT_TLS
9675 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9676 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9677 input_bfd,
9678 input_section,
9679 (long) rel->r_offset,
9680 ppc64_elf_howto_table[r_type]->name,
9681 sym_name);
9682 }
9683
9684 /* Ensure reloc mapping code below stays sane. */
9685 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9686 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9687 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9688 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9689 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9690 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9691 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9692 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9693 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9694 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9695 abort ();
9696
9697 switch (r_type)
9698 {
9699 default:
9700 break;
9701
9702 case R_PPC64_TOC16:
9703 case R_PPC64_TOC16_LO:
9704 case R_PPC64_TOC16_DS:
9705 case R_PPC64_TOC16_LO_DS:
9706 {
9707 /* Check for toc tls entries. */
9708 char *toc_tls;
9709 int retval;
9710
9711 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9712 rel, input_bfd);
9713 if (retval == 0)
9714 return FALSE;
9715
9716 if (toc_tls)
9717 {
9718 tls_mask = *toc_tls;
9719 if (r_type == R_PPC64_TOC16_DS
9720 || r_type == R_PPC64_TOC16_LO_DS)
9721 {
9722 if (tls_mask != 0
9723 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9724 goto toctprel;
9725 }
9726 else
9727 {
9728 /* If we found a GD reloc pair, then we might be
9729 doing a GD->IE transition. */
9730 if (retval == 2)
9731 {
9732 tls_gd = TLS_TPRELGD;
9733 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9734 goto tls_get_addr_check;
9735 }
9736 else if (retval == 3)
9737 {
9738 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9739 goto tls_get_addr_check;
9740 }
9741 }
9742 }
9743 }
9744 break;
9745
9746 case R_PPC64_GOT_TPREL16_DS:
9747 case R_PPC64_GOT_TPREL16_LO_DS:
9748 if (tls_mask != 0
9749 && (tls_mask & TLS_TPREL) == 0)
9750 {
9751 toctprel:
9752 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9753 insn &= 31 << 21;
9754 insn |= 0x3c0d0000; /* addis 0,13,0 */
9755 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9756 r_type = R_PPC64_TPREL16_HA;
9757 if (toc_symndx != 0)
9758 {
9759 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9760 /* We changed the symbol. Start over in order to
9761 get h, sym, sec etc. right. */
9762 rel--;
9763 continue;
9764 }
9765 else
9766 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9767 }
9768 break;
9769
9770 case R_PPC64_TLS:
9771 if (tls_mask != 0
9772 && (tls_mask & TLS_TPREL) == 0)
9773 {
9774 bfd_vma rtra;
9775 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9776 if ((insn & ((0x3f << 26) | (31 << 11)))
9777 == ((31 << 26) | (13 << 11)))
9778 rtra = insn & ((1 << 26) - (1 << 16));
9779 else if ((insn & ((0x3f << 26) | (31 << 16)))
9780 == ((31 << 26) | (13 << 16)))
9781 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9782 else
9783 abort ();
9784 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9785 /* add -> addi. */
9786 insn = 14 << 26;
9787 else if ((insn & (31 << 1)) == 23 << 1
9788 && ((insn & (31 << 6)) < 14 << 6
9789 || ((insn & (31 << 6)) >= 16 << 6
9790 && (insn & (31 << 6)) < 24 << 6)))
9791 /* load and store indexed -> dform. */
9792 insn = (32 | ((insn >> 6) & 31)) << 26;
9793 else if ((insn & (31 << 1)) == 21 << 1
9794 && (insn & (0x1a << 6)) == 0)
9795 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9796 insn = (((58 | ((insn >> 6) & 4)) << 26)
9797 | ((insn >> 6) & 1));
9798 else if ((insn & (31 << 1)) == 21 << 1
9799 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9800 /* lwax -> lwa. */
9801 insn = (58 << 26) | 2;
9802 else
9803 abort ();
9804 insn |= rtra;
9805 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9806 /* Was PPC64_TLS which sits on insn boundary, now
9807 PPC64_TPREL16_LO which is at insn+2. */
9808 rel->r_offset += 2;
9809 r_type = R_PPC64_TPREL16_LO;
9810 if (toc_symndx != 0)
9811 {
9812 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9813 /* We changed the symbol. Start over in order to
9814 get h, sym, sec etc. right. */
9815 rel--;
9816 continue;
9817 }
9818 else
9819 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9820 }
9821 break;
9822
9823 case R_PPC64_GOT_TLSGD16_HI:
9824 case R_PPC64_GOT_TLSGD16_HA:
9825 tls_gd = TLS_TPRELGD;
9826 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9827 goto tls_gdld_hi;
9828 break;
9829
9830 case R_PPC64_GOT_TLSLD16_HI:
9831 case R_PPC64_GOT_TLSLD16_HA:
9832 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9833 {
9834 tls_gdld_hi:
9835 if ((tls_mask & tls_gd) != 0)
9836 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9837 + R_PPC64_GOT_TPREL16_DS);
9838 else
9839 {
9840 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9841 rel->r_offset -= 2;
9842 r_type = R_PPC64_NONE;
9843 }
9844 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9845 }
9846 break;
9847
9848 case R_PPC64_GOT_TLSGD16:
9849 case R_PPC64_GOT_TLSGD16_LO:
9850 tls_gd = TLS_TPRELGD;
9851 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9852 goto tls_get_addr_check;
9853 break;
9854
9855 case R_PPC64_GOT_TLSLD16:
9856 case R_PPC64_GOT_TLSLD16_LO:
9857 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9858 {
9859 tls_get_addr_check:
9860 if (rel + 1 < relend)
9861 {
9862 enum elf_ppc64_reloc_type r_type2;
9863 unsigned long r_symndx2;
9864 struct elf_link_hash_entry *h2;
9865 bfd_vma insn1, insn2, insn3;
9866 bfd_vma offset;
9867
9868 /* The next instruction should be a call to
9869 __tls_get_addr. Peek at the reloc to be sure. */
9870 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9871 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9872 if (r_symndx2 < symtab_hdr->sh_info
9873 || (r_type2 != R_PPC64_REL14
9874 && r_type2 != R_PPC64_REL14_BRTAKEN
9875 && r_type2 != R_PPC64_REL14_BRNTAKEN
9876 && r_type2 != R_PPC64_REL24))
9877 break;
9878
9879 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9880 while (h2->root.type == bfd_link_hash_indirect
9881 || h2->root.type == bfd_link_hash_warning)
9882 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9883 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9884 && h2 != &htab->tls_get_addr_fd->elf))
9885 break;
9886
9887 /* OK, it checks out. Replace the call. */
9888 offset = rel[1].r_offset;
9889 insn1 = bfd_get_32 (output_bfd,
9890 contents + rel->r_offset - 2);
9891 insn3 = bfd_get_32 (output_bfd,
9892 contents + offset + 4);
9893 if ((tls_mask & tls_gd) != 0)
9894 {
9895 /* IE */
9896 insn1 &= (1 << 26) - (1 << 2);
9897 insn1 |= 58 << 26; /* ld */
9898 insn2 = 0x7c636a14; /* add 3,3,13 */
9899 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9900 if ((tls_mask & TLS_EXPLICIT) == 0)
9901 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9902 + R_PPC64_GOT_TPREL16_DS);
9903 else
9904 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9905 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9906 }
9907 else
9908 {
9909 /* LE */
9910 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9911 insn2 = 0x38630000; /* addi 3,3,0 */
9912 if (tls_gd == 0)
9913 {
9914 /* Was an LD reloc. */
9915 r_symndx = 0;
9916 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9917 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9918 }
9919 else if (toc_symndx != 0)
9920 r_symndx = toc_symndx;
9921 r_type = R_PPC64_TPREL16_HA;
9922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9923 rel[1].r_info = ELF64_R_INFO (r_symndx,
9924 R_PPC64_TPREL16_LO);
9925 rel[1].r_offset += 2;
9926 }
9927 if (insn3 == NOP
9928 || insn3 == CROR_151515 || insn3 == CROR_313131)
9929 {
9930 insn3 = insn2;
9931 insn2 = NOP;
9932 rel[1].r_offset += 4;
9933 }
9934 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9935 bfd_put_32 (output_bfd, insn2, contents + offset);
9936 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9937 if (tls_gd == 0 || toc_symndx != 0)
9938 {
9939 /* We changed the symbol. Start over in order
9940 to get h, sym, sec etc. right. */
9941 rel--;
9942 continue;
9943 }
9944 }
9945 }
9946 break;
9947
9948 case R_PPC64_DTPMOD64:
9949 if (rel + 1 < relend
9950 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9951 && rel[1].r_offset == rel->r_offset + 8)
9952 {
9953 if ((tls_mask & TLS_GD) == 0)
9954 {
9955 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9956 if ((tls_mask & TLS_TPRELGD) != 0)
9957 r_type = R_PPC64_TPREL64;
9958 else
9959 {
9960 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9961 r_type = R_PPC64_NONE;
9962 }
9963 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9964 }
9965 }
9966 else
9967 {
9968 if ((tls_mask & TLS_LD) == 0)
9969 {
9970 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9971 r_type = R_PPC64_NONE;
9972 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9973 }
9974 }
9975 break;
9976
9977 case R_PPC64_TPREL64:
9978 if ((tls_mask & TLS_TPREL) == 0)
9979 {
9980 r_type = R_PPC64_NONE;
9981 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9982 }
9983 break;
9984 }
9985
9986 /* Handle other relocations that tweak non-addend part of insn. */
9987 insn = 0;
9988 max_br_offset = 1 << 25;
9989 addend = rel->r_addend;
9990 switch (r_type)
9991 {
9992 default:
9993 break;
9994
9995 /* Branch taken prediction relocations. */
9996 case R_PPC64_ADDR14_BRTAKEN:
9997 case R_PPC64_REL14_BRTAKEN:
9998 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9999 /* Fall thru. */
10000
10001 /* Branch not taken prediction relocations. */
10002 case R_PPC64_ADDR14_BRNTAKEN:
10003 case R_PPC64_REL14_BRNTAKEN:
10004 insn |= bfd_get_32 (output_bfd,
10005 contents + rel->r_offset) & ~(0x01 << 21);
10006 /* Fall thru. */
10007
10008 case R_PPC64_REL14:
10009 max_br_offset = 1 << 15;
10010 /* Fall thru. */
10011
10012 case R_PPC64_REL24:
10013 /* Calls to functions with a different TOC, such as calls to
10014 shared objects, need to alter the TOC pointer. This is
10015 done using a linkage stub. A REL24 branching to these
10016 linkage stubs needs to be followed by a nop, as the nop
10017 will be replaced with an instruction to restore the TOC
10018 base pointer. */
10019 stub_entry = NULL;
10020 fdh = h;
10021 if (((h != NULL
10022 && (((fdh = h->oh) != NULL
10023 && fdh->elf.plt.plist != NULL)
10024 || (fdh = h)->elf.plt.plist != NULL))
10025 || (sec != NULL
10026 && sec->output_section != NULL
10027 && sec->id <= htab->top_id
10028 && (htab->stub_group[sec->id].toc_off
10029 != htab->stub_group[input_section->id].toc_off)))
10030 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10031 rel, htab)) != NULL
10032 && (stub_entry->stub_type == ppc_stub_plt_call
10033 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10034 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10035 {
10036 bfd_boolean can_plt_call = FALSE;
10037
10038 if (rel->r_offset + 8 <= input_section->size)
10039 {
10040 unsigned long nop;
10041 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10042 if (nop == NOP
10043 || nop == CROR_151515 || nop == CROR_313131)
10044 {
10045 bfd_put_32 (input_bfd, LD_R2_40R1,
10046 contents + rel->r_offset + 4);
10047 can_plt_call = TRUE;
10048 }
10049 }
10050
10051 if (!can_plt_call)
10052 {
10053 if (stub_entry->stub_type == ppc_stub_plt_call)
10054 {
10055 /* If this is a plain branch rather than a branch
10056 and link, don't require a nop. */
10057 unsigned long br;
10058 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10059 if ((br & 1) == 0)
10060 can_plt_call = TRUE;
10061 else
10062 stub_entry = NULL;
10063 }
10064 else if (h != NULL
10065 && strcmp (h->elf.root.root.string,
10066 ".__libc_start_main") == 0)
10067 {
10068 /* Allow crt1 branch to go via a toc adjusting stub. */
10069 can_plt_call = TRUE;
10070 }
10071 else
10072 {
10073 if (strcmp (input_section->output_section->name,
10074 ".init") == 0
10075 || strcmp (input_section->output_section->name,
10076 ".fini") == 0)
10077 (*_bfd_error_handler)
10078 (_("%B(%A+0x%lx): automatic multiple TOCs "
10079 "not supported using your crt files; "
10080 "recompile with -mminimal-toc or upgrade gcc"),
10081 input_bfd,
10082 input_section,
10083 (long) rel->r_offset);
10084 else
10085 (*_bfd_error_handler)
10086 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10087 "does not allow automatic multiple TOCs; "
10088 "recompile with -mminimal-toc or "
10089 "-fno-optimize-sibling-calls, "
10090 "or make `%s' extern"),
10091 input_bfd,
10092 input_section,
10093 (long) rel->r_offset,
10094 sym_name,
10095 sym_name);
10096 bfd_set_error (bfd_error_bad_value);
10097 ret = FALSE;
10098 }
10099 }
10100
10101 if (can_plt_call
10102 && stub_entry->stub_type == ppc_stub_plt_call)
10103 unresolved_reloc = FALSE;
10104 }
10105
10106 if (stub_entry == NULL
10107 && get_opd_info (sec) != NULL)
10108 {
10109 /* The branch destination is the value of the opd entry. */
10110 bfd_vma off = (relocation - sec->output_section->vma
10111 - sec->output_offset + rel->r_addend);
10112 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10113 if (dest != (bfd_vma) -1)
10114 {
10115 relocation = dest;
10116 addend = 0;
10117 }
10118 }
10119
10120 /* If the branch is out of reach we ought to have a long
10121 branch stub. */
10122 from = (rel->r_offset
10123 + input_section->output_offset
10124 + input_section->output_section->vma);
10125
10126 if (stub_entry == NULL
10127 && (relocation + rel->r_addend - from + max_br_offset
10128 >= 2 * max_br_offset)
10129 && r_type != R_PPC64_ADDR14_BRTAKEN
10130 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10131 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10132 htab);
10133
10134 if (stub_entry != NULL)
10135 {
10136 /* Munge up the value and addend so that we call the stub
10137 rather than the procedure directly. */
10138 relocation = (stub_entry->stub_offset
10139 + stub_entry->stub_sec->output_offset
10140 + stub_entry->stub_sec->output_section->vma);
10141 addend = 0;
10142 }
10143
10144 if (insn != 0)
10145 {
10146 if (is_power4)
10147 {
10148 /* Set 'a' bit. This is 0b00010 in BO field for branch
10149 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10150 for branch on CTR insns (BO == 1a00t or 1a01t). */
10151 if ((insn & (0x14 << 21)) == (0x04 << 21))
10152 insn |= 0x02 << 21;
10153 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10154 insn |= 0x08 << 21;
10155 else
10156 break;
10157 }
10158 else
10159 {
10160 /* Invert 'y' bit if not the default. */
10161 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10162 insn ^= 0x01 << 21;
10163 }
10164
10165 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10166 }
10167
10168 /* NOP out calls to undefined weak functions.
10169 We can thus call a weak function without first
10170 checking whether the function is defined. */
10171 else if (h != NULL
10172 && h->elf.root.type == bfd_link_hash_undefweak
10173 && r_type == R_PPC64_REL24
10174 && relocation == 0
10175 && rel->r_addend == 0)
10176 {
10177 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10178 continue;
10179 }
10180 break;
10181 }
10182
10183 /* Set `addend'. */
10184 tls_type = 0;
10185 switch (r_type)
10186 {
10187 default:
10188 (*_bfd_error_handler)
10189 (_("%B: unknown relocation type %d for symbol %s"),
10190 input_bfd, (int) r_type, sym_name);
10191
10192 bfd_set_error (bfd_error_bad_value);
10193 ret = FALSE;
10194 continue;
10195
10196 case R_PPC64_NONE:
10197 case R_PPC64_TLS:
10198 case R_PPC64_GNU_VTINHERIT:
10199 case R_PPC64_GNU_VTENTRY:
10200 continue;
10201
10202 /* GOT16 relocations. Like an ADDR16 using the symbol's
10203 address in the GOT as relocation value instead of the
10204 symbol's value itself. Also, create a GOT entry for the
10205 symbol and put the symbol value there. */
10206 case R_PPC64_GOT_TLSGD16:
10207 case R_PPC64_GOT_TLSGD16_LO:
10208 case R_PPC64_GOT_TLSGD16_HI:
10209 case R_PPC64_GOT_TLSGD16_HA:
10210 tls_type = TLS_TLS | TLS_GD;
10211 goto dogot;
10212
10213 case R_PPC64_GOT_TLSLD16:
10214 case R_PPC64_GOT_TLSLD16_LO:
10215 case R_PPC64_GOT_TLSLD16_HI:
10216 case R_PPC64_GOT_TLSLD16_HA:
10217 tls_type = TLS_TLS | TLS_LD;
10218 goto dogot;
10219
10220 case R_PPC64_GOT_TPREL16_DS:
10221 case R_PPC64_GOT_TPREL16_LO_DS:
10222 case R_PPC64_GOT_TPREL16_HI:
10223 case R_PPC64_GOT_TPREL16_HA:
10224 tls_type = TLS_TLS | TLS_TPREL;
10225 goto dogot;
10226
10227 case R_PPC64_GOT_DTPREL16_DS:
10228 case R_PPC64_GOT_DTPREL16_LO_DS:
10229 case R_PPC64_GOT_DTPREL16_HI:
10230 case R_PPC64_GOT_DTPREL16_HA:
10231 tls_type = TLS_TLS | TLS_DTPREL;
10232 goto dogot;
10233
10234 case R_PPC64_GOT16:
10235 case R_PPC64_GOT16_LO:
10236 case R_PPC64_GOT16_HI:
10237 case R_PPC64_GOT16_HA:
10238 case R_PPC64_GOT16_DS:
10239 case R_PPC64_GOT16_LO_DS:
10240 dogot:
10241 {
10242 /* Relocation is to the entry for this symbol in the global
10243 offset table. */
10244 asection *got;
10245 bfd_vma *offp;
10246 bfd_vma off;
10247 unsigned long indx = 0;
10248
10249 if (tls_type == (TLS_TLS | TLS_LD)
10250 && (h == NULL
10251 || !h->elf.def_dynamic))
10252 offp = &ppc64_tlsld_got (input_bfd)->offset;
10253 else
10254 {
10255 struct got_entry *ent;
10256
10257 if (h != NULL)
10258 {
10259 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10260 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10261 &h->elf)
10262 || (info->shared
10263 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10264 /* This is actually a static link, or it is a
10265 -Bsymbolic link and the symbol is defined
10266 locally, or the symbol was forced to be local
10267 because of a version file. */
10268 ;
10269 else
10270 {
10271 indx = h->elf.dynindx;
10272 unresolved_reloc = FALSE;
10273 }
10274 ent = h->elf.got.glist;
10275 }
10276 else
10277 {
10278 if (local_got_ents == NULL)
10279 abort ();
10280 ent = local_got_ents[r_symndx];
10281 }
10282
10283 for (; ent != NULL; ent = ent->next)
10284 if (ent->addend == rel->r_addend
10285 && ent->owner == input_bfd
10286 && ent->tls_type == tls_type)
10287 break;
10288 if (ent == NULL)
10289 abort ();
10290 offp = &ent->got.offset;
10291 }
10292
10293 got = ppc64_elf_tdata (input_bfd)->got;
10294 if (got == NULL)
10295 abort ();
10296
10297 /* The offset must always be a multiple of 8. We use the
10298 least significant bit to record whether we have already
10299 processed this entry. */
10300 off = *offp;
10301 if ((off & 1) != 0)
10302 off &= ~1;
10303 else
10304 {
10305 /* Generate relocs for the dynamic linker, except in
10306 the case of TLSLD where we'll use one entry per
10307 module. */
10308 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10309
10310 *offp = off | 1;
10311 if ((info->shared || indx != 0)
10312 && (h == NULL
10313 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10314 || h->elf.root.type != bfd_link_hash_undefweak))
10315 {
10316 outrel.r_offset = (got->output_section->vma
10317 + got->output_offset
10318 + off);
10319 outrel.r_addend = rel->r_addend;
10320 if (tls_type & (TLS_LD | TLS_GD))
10321 {
10322 outrel.r_addend = 0;
10323 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10324 if (tls_type == (TLS_TLS | TLS_GD))
10325 {
10326 loc = relgot->contents;
10327 loc += (relgot->reloc_count++
10328 * sizeof (Elf64_External_Rela));
10329 bfd_elf64_swap_reloca_out (output_bfd,
10330 &outrel, loc);
10331 outrel.r_offset += 8;
10332 outrel.r_addend = rel->r_addend;
10333 outrel.r_info
10334 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10335 }
10336 }
10337 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10338 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10339 else if (tls_type == (TLS_TLS | TLS_TPREL))
10340 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10341 else if (indx == 0)
10342 {
10343 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10344
10345 /* Write the .got section contents for the sake
10346 of prelink. */
10347 loc = got->contents + off;
10348 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10349 loc);
10350 }
10351 else
10352 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10353
10354 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10355 {
10356 outrel.r_addend += relocation;
10357 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10358 outrel.r_addend -= htab->elf.tls_sec->vma;
10359 }
10360 loc = relgot->contents;
10361 loc += (relgot->reloc_count++
10362 * sizeof (Elf64_External_Rela));
10363 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10364 }
10365
10366 /* Init the .got section contents here if we're not
10367 emitting a reloc. */
10368 else
10369 {
10370 relocation += rel->r_addend;
10371 if (tls_type == (TLS_TLS | TLS_LD))
10372 relocation = 1;
10373 else if (tls_type != 0)
10374 {
10375 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10376 if (tls_type == (TLS_TLS | TLS_TPREL))
10377 relocation += DTP_OFFSET - TP_OFFSET;
10378
10379 if (tls_type == (TLS_TLS | TLS_GD))
10380 {
10381 bfd_put_64 (output_bfd, relocation,
10382 got->contents + off + 8);
10383 relocation = 1;
10384 }
10385 }
10386
10387 bfd_put_64 (output_bfd, relocation,
10388 got->contents + off);
10389 }
10390 }
10391
10392 if (off >= (bfd_vma) -2)
10393 abort ();
10394
10395 relocation = got->output_offset + off;
10396
10397 /* TOC base (r2) is TOC start plus 0x8000. */
10398 addend = -TOC_BASE_OFF;
10399 }
10400 break;
10401
10402 case R_PPC64_PLT16_HA:
10403 case R_PPC64_PLT16_HI:
10404 case R_PPC64_PLT16_LO:
10405 case R_PPC64_PLT32:
10406 case R_PPC64_PLT64:
10407 /* Relocation is to the entry for this symbol in the
10408 procedure linkage table. */
10409
10410 /* Resolve a PLT reloc against a local symbol directly,
10411 without using the procedure linkage table. */
10412 if (h == NULL)
10413 break;
10414
10415 /* It's possible that we didn't make a PLT entry for this
10416 symbol. This happens when statically linking PIC code,
10417 or when using -Bsymbolic. Go find a match if there is a
10418 PLT entry. */
10419 if (htab->plt != NULL)
10420 {
10421 struct plt_entry *ent;
10422 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10423 if (ent->addend == rel->r_addend
10424 && ent->plt.offset != (bfd_vma) -1)
10425 {
10426 relocation = (htab->plt->output_section->vma
10427 + htab->plt->output_offset
10428 + ent->plt.offset);
10429 unresolved_reloc = FALSE;
10430 }
10431 }
10432 break;
10433
10434 case R_PPC64_TOC:
10435 /* Relocation value is TOC base. */
10436 relocation = TOCstart;
10437 if (r_symndx == 0)
10438 relocation += htab->stub_group[input_section->id].toc_off;
10439 else if (unresolved_reloc)
10440 ;
10441 else if (sec != NULL && sec->id <= htab->top_id)
10442 relocation += htab->stub_group[sec->id].toc_off;
10443 else
10444 unresolved_reloc = TRUE;
10445 goto dodyn2;
10446
10447 /* TOC16 relocs. We want the offset relative to the TOC base,
10448 which is the address of the start of the TOC plus 0x8000.
10449 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10450 in this order. */
10451 case R_PPC64_TOC16:
10452 case R_PPC64_TOC16_LO:
10453 case R_PPC64_TOC16_HI:
10454 case R_PPC64_TOC16_DS:
10455 case R_PPC64_TOC16_LO_DS:
10456 case R_PPC64_TOC16_HA:
10457 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10458 break;
10459
10460 /* Relocate against the beginning of the section. */
10461 case R_PPC64_SECTOFF:
10462 case R_PPC64_SECTOFF_LO:
10463 case R_PPC64_SECTOFF_HI:
10464 case R_PPC64_SECTOFF_DS:
10465 case R_PPC64_SECTOFF_LO_DS:
10466 case R_PPC64_SECTOFF_HA:
10467 if (sec != NULL)
10468 addend -= sec->output_section->vma;
10469 break;
10470
10471 case R_PPC64_REL14:
10472 case R_PPC64_REL14_BRNTAKEN:
10473 case R_PPC64_REL14_BRTAKEN:
10474 case R_PPC64_REL24:
10475 break;
10476
10477 case R_PPC64_TPREL16:
10478 case R_PPC64_TPREL16_LO:
10479 case R_PPC64_TPREL16_HI:
10480 case R_PPC64_TPREL16_HA:
10481 case R_PPC64_TPREL16_DS:
10482 case R_PPC64_TPREL16_LO_DS:
10483 case R_PPC64_TPREL16_HIGHER:
10484 case R_PPC64_TPREL16_HIGHERA:
10485 case R_PPC64_TPREL16_HIGHEST:
10486 case R_PPC64_TPREL16_HIGHESTA:
10487 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10488 if (info->shared)
10489 /* The TPREL16 relocs shouldn't really be used in shared
10490 libs as they will result in DT_TEXTREL being set, but
10491 support them anyway. */
10492 goto dodyn;
10493 break;
10494
10495 case R_PPC64_DTPREL16:
10496 case R_PPC64_DTPREL16_LO:
10497 case R_PPC64_DTPREL16_HI:
10498 case R_PPC64_DTPREL16_HA:
10499 case R_PPC64_DTPREL16_DS:
10500 case R_PPC64_DTPREL16_LO_DS:
10501 case R_PPC64_DTPREL16_HIGHER:
10502 case R_PPC64_DTPREL16_HIGHERA:
10503 case R_PPC64_DTPREL16_HIGHEST:
10504 case R_PPC64_DTPREL16_HIGHESTA:
10505 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10506 break;
10507
10508 case R_PPC64_DTPMOD64:
10509 relocation = 1;
10510 addend = 0;
10511 goto dodyn;
10512
10513 case R_PPC64_TPREL64:
10514 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10515 goto dodyn;
10516
10517 case R_PPC64_DTPREL64:
10518 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10519 /* Fall thru */
10520
10521 /* Relocations that may need to be propagated if this is a
10522 dynamic object. */
10523 case R_PPC64_REL30:
10524 case R_PPC64_REL32:
10525 case R_PPC64_REL64:
10526 case R_PPC64_ADDR14:
10527 case R_PPC64_ADDR14_BRNTAKEN:
10528 case R_PPC64_ADDR14_BRTAKEN:
10529 case R_PPC64_ADDR16:
10530 case R_PPC64_ADDR16_DS:
10531 case R_PPC64_ADDR16_HA:
10532 case R_PPC64_ADDR16_HI:
10533 case R_PPC64_ADDR16_HIGHER:
10534 case R_PPC64_ADDR16_HIGHERA:
10535 case R_PPC64_ADDR16_HIGHEST:
10536 case R_PPC64_ADDR16_HIGHESTA:
10537 case R_PPC64_ADDR16_LO:
10538 case R_PPC64_ADDR16_LO_DS:
10539 case R_PPC64_ADDR24:
10540 case R_PPC64_ADDR32:
10541 case R_PPC64_ADDR64:
10542 case R_PPC64_UADDR16:
10543 case R_PPC64_UADDR32:
10544 case R_PPC64_UADDR64:
10545 /* r_symndx will be zero only for relocs against symbols
10546 from removed linkonce sections, or sections discarded by
10547 a linker script. */
10548 dodyn:
10549 if (r_symndx == 0)
10550 break;
10551 /* Fall thru. */
10552
10553 dodyn2:
10554 if ((input_section->flags & SEC_ALLOC) == 0)
10555 break;
10556
10557 if (NO_OPD_RELOCS && is_opd)
10558 break;
10559
10560 if ((info->shared
10561 && (h == NULL
10562 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10563 || h->elf.root.type != bfd_link_hash_undefweak)
10564 && (MUST_BE_DYN_RELOC (r_type)
10565 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10566 || (ELIMINATE_COPY_RELOCS
10567 && !info->shared
10568 && h != NULL
10569 && h->elf.dynindx != -1
10570 && !h->elf.non_got_ref
10571 && h->elf.def_dynamic
10572 && !h->elf.def_regular))
10573 {
10574 Elf_Internal_Rela outrel;
10575 bfd_boolean skip, relocate;
10576 asection *sreloc;
10577 bfd_byte *loc;
10578 bfd_vma out_off;
10579
10580 /* When generating a dynamic object, these relocations
10581 are copied into the output file to be resolved at run
10582 time. */
10583
10584 skip = FALSE;
10585 relocate = FALSE;
10586
10587 out_off = _bfd_elf_section_offset (output_bfd, info,
10588 input_section, rel->r_offset);
10589 if (out_off == (bfd_vma) -1)
10590 skip = TRUE;
10591 else if (out_off == (bfd_vma) -2)
10592 skip = TRUE, relocate = TRUE;
10593 out_off += (input_section->output_section->vma
10594 + input_section->output_offset);
10595 outrel.r_offset = out_off;
10596 outrel.r_addend = rel->r_addend;
10597
10598 /* Optimize unaligned reloc use. */
10599 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10600 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10601 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10602 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10603 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10604 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10605 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10606 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10607 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10608
10609 if (skip)
10610 memset (&outrel, 0, sizeof outrel);
10611 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10612 && !is_opd
10613 && r_type != R_PPC64_TOC)
10614 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10615 else
10616 {
10617 /* This symbol is local, or marked to become local,
10618 or this is an opd section reloc which must point
10619 at a local function. */
10620 outrel.r_addend += relocation;
10621 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10622 {
10623 if (is_opd && h != NULL)
10624 {
10625 /* Lie about opd entries. This case occurs
10626 when building shared libraries and we
10627 reference a function in another shared
10628 lib. The same thing happens for a weak
10629 definition in an application that's
10630 overridden by a strong definition in a
10631 shared lib. (I believe this is a generic
10632 bug in binutils handling of weak syms.)
10633 In these cases we won't use the opd
10634 entry in this lib. */
10635 unresolved_reloc = FALSE;
10636 }
10637 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10638
10639 /* We need to relocate .opd contents for ld.so.
10640 Prelink also wants simple and consistent rules
10641 for relocs. This make all RELATIVE relocs have
10642 *r_offset equal to r_addend. */
10643 relocate = TRUE;
10644 }
10645 else
10646 {
10647 long indx = 0;
10648
10649 if (bfd_is_abs_section (sec))
10650 ;
10651 else if (sec == NULL || sec->owner == NULL)
10652 {
10653 bfd_set_error (bfd_error_bad_value);
10654 return FALSE;
10655 }
10656 else
10657 {
10658 asection *osec;
10659
10660 osec = sec->output_section;
10661 indx = elf_section_data (osec)->dynindx;
10662
10663 /* We are turning this relocation into one
10664 against a section symbol, so subtract out
10665 the output section's address but not the
10666 offset of the input section in the output
10667 section. */
10668 outrel.r_addend -= osec->vma;
10669 }
10670
10671 outrel.r_info = ELF64_R_INFO (indx, r_type);
10672 }
10673 }
10674
10675 sreloc = elf_section_data (input_section)->sreloc;
10676 if (sreloc == NULL)
10677 abort ();
10678
10679 loc = sreloc->contents;
10680 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10681 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10682
10683 /* If this reloc is against an external symbol, it will
10684 be computed at runtime, so there's no need to do
10685 anything now. However, for the sake of prelink ensure
10686 that the section contents are a known value. */
10687 if (! relocate)
10688 {
10689 unresolved_reloc = FALSE;
10690 /* The value chosen here is quite arbitrary as ld.so
10691 ignores section contents except for the special
10692 case of .opd where the contents might be accessed
10693 before relocation. Choose zero, as that won't
10694 cause reloc overflow. */
10695 relocation = 0;
10696 addend = 0;
10697 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10698 to improve backward compatibility with older
10699 versions of ld. */
10700 if (r_type == R_PPC64_ADDR64)
10701 addend = outrel.r_addend;
10702 /* Adjust pc_relative relocs to have zero in *r_offset. */
10703 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10704 addend = (input_section->output_section->vma
10705 + input_section->output_offset
10706 + rel->r_offset);
10707 }
10708 }
10709 break;
10710
10711 case R_PPC64_COPY:
10712 case R_PPC64_GLOB_DAT:
10713 case R_PPC64_JMP_SLOT:
10714 case R_PPC64_RELATIVE:
10715 /* We shouldn't ever see these dynamic relocs in relocatable
10716 files. */
10717 /* Fall through. */
10718
10719 case R_PPC64_PLTGOT16:
10720 case R_PPC64_PLTGOT16_DS:
10721 case R_PPC64_PLTGOT16_HA:
10722 case R_PPC64_PLTGOT16_HI:
10723 case R_PPC64_PLTGOT16_LO:
10724 case R_PPC64_PLTGOT16_LO_DS:
10725 case R_PPC64_PLTREL32:
10726 case R_PPC64_PLTREL64:
10727 /* These ones haven't been implemented yet. */
10728
10729 (*_bfd_error_handler)
10730 (_("%B: relocation %s is not supported for symbol %s."),
10731 input_bfd,
10732 ppc64_elf_howto_table[r_type]->name, sym_name);
10733
10734 bfd_set_error (bfd_error_invalid_operation);
10735 ret = FALSE;
10736 continue;
10737 }
10738
10739 /* Do any further special processing. */
10740 switch (r_type)
10741 {
10742 default:
10743 break;
10744
10745 case R_PPC64_ADDR16_HA:
10746 case R_PPC64_ADDR16_HIGHERA:
10747 case R_PPC64_ADDR16_HIGHESTA:
10748 case R_PPC64_GOT16_HA:
10749 case R_PPC64_PLTGOT16_HA:
10750 case R_PPC64_PLT16_HA:
10751 case R_PPC64_TOC16_HA:
10752 case R_PPC64_SECTOFF_HA:
10753 case R_PPC64_TPREL16_HA:
10754 case R_PPC64_DTPREL16_HA:
10755 case R_PPC64_GOT_TLSGD16_HA:
10756 case R_PPC64_GOT_TLSLD16_HA:
10757 case R_PPC64_GOT_TPREL16_HA:
10758 case R_PPC64_GOT_DTPREL16_HA:
10759 case R_PPC64_TPREL16_HIGHER:
10760 case R_PPC64_TPREL16_HIGHERA:
10761 case R_PPC64_TPREL16_HIGHEST:
10762 case R_PPC64_TPREL16_HIGHESTA:
10763 case R_PPC64_DTPREL16_HIGHER:
10764 case R_PPC64_DTPREL16_HIGHERA:
10765 case R_PPC64_DTPREL16_HIGHEST:
10766 case R_PPC64_DTPREL16_HIGHESTA:
10767 /* It's just possible that this symbol is a weak symbol
10768 that's not actually defined anywhere. In that case,
10769 'sec' would be NULL, and we should leave the symbol
10770 alone (it will be set to zero elsewhere in the link). */
10771 if (sec != NULL)
10772 /* Add 0x10000 if sign bit in 0:15 is set.
10773 Bits 0:15 are not used. */
10774 addend += 0x8000;
10775 break;
10776
10777 case R_PPC64_ADDR16_DS:
10778 case R_PPC64_ADDR16_LO_DS:
10779 case R_PPC64_GOT16_DS:
10780 case R_PPC64_GOT16_LO_DS:
10781 case R_PPC64_PLT16_LO_DS:
10782 case R_PPC64_SECTOFF_DS:
10783 case R_PPC64_SECTOFF_LO_DS:
10784 case R_PPC64_TOC16_DS:
10785 case R_PPC64_TOC16_LO_DS:
10786 case R_PPC64_PLTGOT16_DS:
10787 case R_PPC64_PLTGOT16_LO_DS:
10788 case R_PPC64_GOT_TPREL16_DS:
10789 case R_PPC64_GOT_TPREL16_LO_DS:
10790 case R_PPC64_GOT_DTPREL16_DS:
10791 case R_PPC64_GOT_DTPREL16_LO_DS:
10792 case R_PPC64_TPREL16_DS:
10793 case R_PPC64_TPREL16_LO_DS:
10794 case R_PPC64_DTPREL16_DS:
10795 case R_PPC64_DTPREL16_LO_DS:
10796 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10797 mask = 3;
10798 /* If this reloc is against an lq insn, then the value must be
10799 a multiple of 16. This is somewhat of a hack, but the
10800 "correct" way to do this by defining _DQ forms of all the
10801 _DS relocs bloats all reloc switches in this file. It
10802 doesn't seem to make much sense to use any of these relocs
10803 in data, so testing the insn should be safe. */
10804 if ((insn & (0x3f << 26)) == (56u << 26))
10805 mask = 15;
10806 if (((relocation + addend) & mask) != 0)
10807 {
10808 (*_bfd_error_handler)
10809 (_("%B: error: relocation %s not a multiple of %d"),
10810 input_bfd,
10811 ppc64_elf_howto_table[r_type]->name,
10812 mask + 1);
10813 bfd_set_error (bfd_error_bad_value);
10814 ret = FALSE;
10815 continue;
10816 }
10817 break;
10818 }
10819
10820 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10821 because such sections are not SEC_ALLOC and thus ld.so will
10822 not process them. */
10823 if (unresolved_reloc
10824 && !((input_section->flags & SEC_DEBUGGING) != 0
10825 && h->elf.def_dynamic))
10826 {
10827 (*_bfd_error_handler)
10828 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10829 input_bfd,
10830 input_section,
10831 (long) rel->r_offset,
10832 ppc64_elf_howto_table[(int) r_type]->name,
10833 h->elf.root.root.string);
10834 ret = FALSE;
10835 }
10836
10837 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10838 input_bfd,
10839 input_section,
10840 contents,
10841 rel->r_offset,
10842 relocation,
10843 addend);
10844
10845 if (r != bfd_reloc_ok)
10846 {
10847 if (sym_name == NULL)
10848 sym_name = "(null)";
10849 if (r == bfd_reloc_overflow)
10850 {
10851 if (warned)
10852 continue;
10853 if (h != NULL
10854 && h->elf.root.type == bfd_link_hash_undefweak
10855 && ppc64_elf_howto_table[r_type]->pc_relative)
10856 {
10857 /* Assume this is a call protected by other code that
10858 detects the symbol is undefined. If this is the case,
10859 we can safely ignore the overflow. If not, the
10860 program is hosed anyway, and a little warning isn't
10861 going to help. */
10862
10863 continue;
10864 }
10865
10866 if (!((*info->callbacks->reloc_overflow)
10867 (info, (h ? &h->elf.root : NULL), sym_name,
10868 ppc64_elf_howto_table[r_type]->name,
10869 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10870 return FALSE;
10871 }
10872 else
10873 {
10874 (*_bfd_error_handler)
10875 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10876 input_bfd,
10877 input_section,
10878 (long) rel->r_offset,
10879 ppc64_elf_howto_table[r_type]->name,
10880 sym_name,
10881 (int) r);
10882 ret = FALSE;
10883 }
10884 }
10885 }
10886
10887 /* If we're emitting relocations, then shortly after this function
10888 returns, reloc offsets and addends for this section will be
10889 adjusted. Worse, reloc symbol indices will be for the output
10890 file rather than the input. Save a copy of the relocs for
10891 opd_entry_value. */
10892 if (is_opd && info->emitrelocations)
10893 {
10894 bfd_size_type amt;
10895 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10896 rel = bfd_alloc (input_bfd, amt);
10897 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10898 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10899 if (rel == NULL)
10900 return FALSE;
10901 memcpy (rel, relocs, amt);
10902 }
10903 return ret;
10904 }
10905
10906 /* Adjust the value of any local symbols in opd sections. */
10907
10908 static bfd_boolean
10909 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10910 const char *name ATTRIBUTE_UNUSED,
10911 Elf_Internal_Sym *elfsym,
10912 asection *input_sec,
10913 struct elf_link_hash_entry *h)
10914 {
10915 long *opd_adjust, adjust;
10916 bfd_vma value;
10917
10918 if (h != NULL)
10919 return TRUE;
10920
10921 opd_adjust = get_opd_info (input_sec);
10922 if (opd_adjust == NULL)
10923 return TRUE;
10924
10925 value = elfsym->st_value - input_sec->output_offset;
10926 if (!info->relocatable)
10927 value -= input_sec->output_section->vma;
10928
10929 adjust = opd_adjust[value / 8];
10930 if (adjust == -1)
10931 elfsym->st_value = 0;
10932 else
10933 elfsym->st_value += adjust;
10934 return TRUE;
10935 }
10936
10937 /* Finish up dynamic symbol handling. We set the contents of various
10938 dynamic sections here. */
10939
10940 static bfd_boolean
10941 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10942 struct bfd_link_info *info,
10943 struct elf_link_hash_entry *h,
10944 Elf_Internal_Sym *sym)
10945 {
10946 struct ppc_link_hash_table *htab;
10947 bfd *dynobj;
10948 struct plt_entry *ent;
10949 Elf_Internal_Rela rela;
10950 bfd_byte *loc;
10951
10952 htab = ppc_hash_table (info);
10953 dynobj = htab->elf.dynobj;
10954
10955 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10956 if (ent->plt.offset != (bfd_vma) -1)
10957 {
10958 /* This symbol has an entry in the procedure linkage
10959 table. Set it up. */
10960
10961 if (htab->plt == NULL
10962 || htab->relplt == NULL
10963 || htab->glink == NULL)
10964 abort ();
10965
10966 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10967 fill in the PLT entry. */
10968 rela.r_offset = (htab->plt->output_section->vma
10969 + htab->plt->output_offset
10970 + ent->plt.offset);
10971 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10972 rela.r_addend = ent->addend;
10973
10974 loc = htab->relplt->contents;
10975 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10976 * sizeof (Elf64_External_Rela));
10977 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10978 }
10979
10980 if (h->needs_copy)
10981 {
10982 Elf_Internal_Rela rela;
10983 bfd_byte *loc;
10984
10985 /* This symbol needs a copy reloc. Set it up. */
10986
10987 if (h->dynindx == -1
10988 || (h->root.type != bfd_link_hash_defined
10989 && h->root.type != bfd_link_hash_defweak)
10990 || htab->relbss == NULL)
10991 abort ();
10992
10993 rela.r_offset = (h->root.u.def.value
10994 + h->root.u.def.section->output_section->vma
10995 + h->root.u.def.section->output_offset);
10996 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10997 rela.r_addend = 0;
10998 loc = htab->relbss->contents;
10999 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11000 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11001 }
11002
11003 /* Mark some specially defined symbols as absolute. */
11004 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11005 sym->st_shndx = SHN_ABS;
11006
11007 return TRUE;
11008 }
11009
11010 /* Used to decide how to sort relocs in an optimal manner for the
11011 dynamic linker, before writing them out. */
11012
11013 static enum elf_reloc_type_class
11014 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11015 {
11016 enum elf_ppc64_reloc_type r_type;
11017
11018 r_type = ELF64_R_TYPE (rela->r_info);
11019 switch (r_type)
11020 {
11021 case R_PPC64_RELATIVE:
11022 return reloc_class_relative;
11023 case R_PPC64_JMP_SLOT:
11024 return reloc_class_plt;
11025 case R_PPC64_COPY:
11026 return reloc_class_copy;
11027 default:
11028 return reloc_class_normal;
11029 }
11030 }
11031
11032 /* Finish up the dynamic sections. */
11033
11034 static bfd_boolean
11035 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11036 struct bfd_link_info *info)
11037 {
11038 struct ppc_link_hash_table *htab;
11039 bfd *dynobj;
11040 asection *sdyn;
11041
11042 htab = ppc_hash_table (info);
11043 dynobj = htab->elf.dynobj;
11044 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11045
11046 if (htab->elf.dynamic_sections_created)
11047 {
11048 Elf64_External_Dyn *dyncon, *dynconend;
11049
11050 if (sdyn == NULL || htab->got == NULL)
11051 abort ();
11052
11053 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11054 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11055 for (; dyncon < dynconend; dyncon++)
11056 {
11057 Elf_Internal_Dyn dyn;
11058 asection *s;
11059
11060 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11061
11062 switch (dyn.d_tag)
11063 {
11064 default:
11065 continue;
11066
11067 case DT_PPC64_GLINK:
11068 s = htab->glink;
11069 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11070 /* We stupidly defined DT_PPC64_GLINK to be the start
11071 of glink rather than the first entry point, which is
11072 what ld.so needs, and now have a bigger stub to
11073 support automatic multiple TOCs. */
11074 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11075 break;
11076
11077 case DT_PPC64_OPD:
11078 s = bfd_get_section_by_name (output_bfd, ".opd");
11079 if (s == NULL)
11080 continue;
11081 dyn.d_un.d_ptr = s->vma;
11082 break;
11083
11084 case DT_PPC64_OPDSZ:
11085 s = bfd_get_section_by_name (output_bfd, ".opd");
11086 if (s == NULL)
11087 continue;
11088 dyn.d_un.d_val = s->size;
11089 break;
11090
11091 case DT_PLTGOT:
11092 s = htab->plt;
11093 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11094 break;
11095
11096 case DT_JMPREL:
11097 s = htab->relplt;
11098 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11099 break;
11100
11101 case DT_PLTRELSZ:
11102 dyn.d_un.d_val = htab->relplt->size;
11103 break;
11104
11105 case DT_RELASZ:
11106 /* Don't count procedure linkage table relocs in the
11107 overall reloc count. */
11108 s = htab->relplt;
11109 if (s == NULL)
11110 continue;
11111 dyn.d_un.d_val -= s->size;
11112 break;
11113
11114 case DT_RELA:
11115 /* We may not be using the standard ELF linker script.
11116 If .rela.plt is the first .rela section, we adjust
11117 DT_RELA to not include it. */
11118 s = htab->relplt;
11119 if (s == NULL)
11120 continue;
11121 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11122 continue;
11123 dyn.d_un.d_ptr += s->size;
11124 break;
11125 }
11126
11127 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11128 }
11129 }
11130
11131 if (htab->got != NULL && htab->got->size != 0)
11132 {
11133 /* Fill in the first entry in the global offset table.
11134 We use it to hold the link-time TOCbase. */
11135 bfd_put_64 (output_bfd,
11136 elf_gp (output_bfd) + TOC_BASE_OFF,
11137 htab->got->contents);
11138
11139 /* Set .got entry size. */
11140 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11141 }
11142
11143 if (htab->plt != NULL && htab->plt->size != 0)
11144 {
11145 /* Set .plt entry size. */
11146 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11147 = PLT_ENTRY_SIZE;
11148 }
11149
11150 /* We need to handle writing out multiple GOT sections ourselves,
11151 since we didn't add them to DYNOBJ. We know dynobj is the first
11152 bfd. */
11153 while ((dynobj = dynobj->link_next) != NULL)
11154 {
11155 asection *s;
11156
11157 if (!is_ppc64_elf_target (dynobj->xvec))
11158 continue;
11159
11160 s = ppc64_elf_tdata (dynobj)->got;
11161 if (s != NULL
11162 && s->size != 0
11163 && s->output_section != bfd_abs_section_ptr
11164 && !bfd_set_section_contents (output_bfd, s->output_section,
11165 s->contents, s->output_offset,
11166 s->size))
11167 return FALSE;
11168 s = ppc64_elf_tdata (dynobj)->relgot;
11169 if (s != NULL
11170 && s->size != 0
11171 && s->output_section != bfd_abs_section_ptr
11172 && !bfd_set_section_contents (output_bfd, s->output_section,
11173 s->contents, s->output_offset,
11174 s->size))
11175 return FALSE;
11176 }
11177
11178 return TRUE;
11179 }
11180
11181 #include "elf64-target.h"