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Merge from gcc:
[binutils.git] / bfd / elf64-ppc.c
blob50cb5d878a9df02aba3c6b1c1766ebc9ce5147b5
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 /* The 64-bit PowerPC ELF ABI may be found at
23 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
24 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
25
26 #include "bfd.h"
27 #include "sysdep.h"
28 #include "bfdlink.h"
29 #include "libbfd.h"
30 #include "elf-bfd.h"
31 #include "elf/ppc.h"
32 #include "elf/ppc64.h"
33 #include "elf64-ppc.h"
34
35 static bfd_reloc_status_type ppc64_elf_ha_reloc
36 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_toc_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc64_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51
52
53 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
54 #define TARGET_LITTLE_NAME "elf64-powerpcle"
55 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
56 #define TARGET_BIG_NAME "elf64-powerpc"
57 #define ELF_ARCH bfd_arch_powerpc
58 #define ELF_MACHINE_CODE EM_PPC64
59 #define ELF_MAXPAGESIZE 0x10000
60 #define elf_info_to_howto ppc64_elf_info_to_howto
61
62 #define elf_backend_want_got_sym 0
63 #define elf_backend_want_plt_sym 0
64 #define elf_backend_plt_alignment 3
65 #define elf_backend_plt_not_loaded 1
66 #define elf_backend_got_symbol_offset 0
67 #define elf_backend_got_header_size 8
68 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
69 #define elf_backend_can_gc_sections 1
70 #define elf_backend_can_refcount 1
71 #define elf_backend_rela_normal 1
72
73 #define bfd_elf64_mkobject ppc64_elf_mkobject
74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
79
80 #define elf_backend_object_p ppc64_elf_object_p
81 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
82 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
83 #define elf_backend_check_relocs ppc64_elf_check_relocs
84 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
85 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
86 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
87 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
88 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
89 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
90 #define elf_backend_relocate_section ppc64_elf_relocate_section
91 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
92 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
93 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
94 #define elf_backend_special_sections ppc64_elf_special_sections
95
96 /* The name of the dynamic interpreter. This is put in the .interp
97 section. */
98 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
99
100 /* The size in bytes of an entry in the procedure linkage table. */
101 #define PLT_ENTRY_SIZE 24
102
103 /* The initial size of the plt reserved for the dynamic linker. */
104 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
105
106 /* TOC base pointers offset from start of TOC. */
107 #define TOC_BASE_OFF 0x8000
108
109 /* Offset of tp and dtp pointers from start of TLS block. */
110 #define TP_OFFSET 0x7000
111 #define DTP_OFFSET 0x8000
112
113 /* .plt call stub instructions. The normal stub is like this, but
114 sometimes the .plt entry crosses a 64k boundary and we need to
115 insert an addis to adjust r12. */
116 #define PLT_CALL_STUB_SIZE (7*4)
117 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
118 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
119 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
120 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
121 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
122 /* ld %r11,xxx+16@l(%r12) */
123 #define BCTR 0x4e800420 /* bctr */
124
125
126 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
127 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
128
129 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
130
131 /* glink call stub instructions. We enter with the index in R0, and the
132 address of glink entry in CTR. From that, we can calculate PLT0. */
133 #define GLINK_CALL_STUB_SIZE (16*4)
134 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
135 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
136 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
137 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
138 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
139 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
140 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
141 /* sub %r12,%r12,%r11 */
142 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
143 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
144 /* ld %r11,xxx@l(%r12) */
145 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
146 /* ld %r2,8(%r12) */
147 /* mtctr %r11 */
148 /* ld %r11,16(%r12) */
149 /* bctr */
150
151 /* Pad with this. */
152 #define NOP 0x60000000
153
154 /* Some other nops. */
155 #define CROR_151515 0x4def7b82
156 #define CROR_313131 0x4ffffb82
157
158 /* .glink entries for the first 32k functions are two instructions. */
159 #define LI_R0_0 0x38000000 /* li %r0,0 */
160 #define B_DOT 0x48000000 /* b . */
161
162 /* After that, we need two instructions to load the index, followed by
163 a branch. */
164 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
165 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
166
167 /* Instructions to save and restore floating point regs. */
168 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
169 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
170 #define BLR 0x4e800020 /* blr */
171
172 /* Since .opd is an array of descriptors and each entry will end up
173 with identical R_PPC64_RELATIVE relocs, there is really no need to
174 propagate .opd relocs; The dynamic linker should be taught to
175 relocate .opd without reloc entries. */
176 #ifndef NO_OPD_RELOCS
177 #define NO_OPD_RELOCS 0
178 #endif
179 \f
180 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
181
182 /* Relocation HOWTO's. */
183 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
184
185 static reloc_howto_type ppc64_elf_howto_raw[] = {
186 /* This reloc does nothing. */
187 HOWTO (R_PPC64_NONE, /* type */
188 0, /* rightshift */
189 2, /* size (0 = byte, 1 = short, 2 = long) */
190 32, /* bitsize */
191 FALSE, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_dont, /* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_PPC64_NONE", /* name */
196 FALSE, /* partial_inplace */
197 0, /* src_mask */
198 0, /* dst_mask */
199 FALSE), /* pcrel_offset */
200
201 /* A standard 32 bit relocation. */
202 HOWTO (R_PPC64_ADDR32, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 32, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC64_ADDR32", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0xffffffff, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* An absolute 26 bit branch; the lower two bits must be zero.
217 FIXME: we don't check that, we just clear them. */
218 HOWTO (R_PPC64_ADDR24, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 26, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_bitfield, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC64_ADDR24", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0x03fffffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 16 bit relocation. */
233 HOWTO (R_PPC64_ADDR16, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC64_ADDR16", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* A 16 bit relocation without overflow. */
248 HOWTO (R_PPC64_ADDR16_LO, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_dont,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC64_ADDR16_LO", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* Bits 16-31 of an address. */
263 HOWTO (R_PPC64_ADDR16_HI, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC64_ADDR16_HI", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
278 bits, treated as a signed number, is negative. */
279 HOWTO (R_PPC64_ADDR16_HA, /* type */
280 16, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont, /* complain_on_overflow */
286 ppc64_elf_ha_reloc, /* special_function */
287 "R_PPC64_ADDR16_HA", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch; the lower two bits must be zero.
294 FIXME: we don't check that, we just clear them. */
295 HOWTO (R_PPC64_ADDR14, /* type */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_bitfield, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR14", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0x0000fffc, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* An absolute 16 bit branch, for which bit 10 should be set to
310 indicate that the branch is expected to be taken. The lower two
311 bits must be zero. */
312 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_bitfield, /* complain_on_overflow */
319 ppc64_elf_brtaken_reloc, /* special_function */
320 "R_PPC64_ADDR14_BRTAKEN",/* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0x0000fffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is not expected to be taken. The lower
328 two bits must be zero. */
329 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_bitfield, /* complain_on_overflow */
336 ppc64_elf_brtaken_reloc, /* special_function */
337 "R_PPC64_ADDR14_BRNTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0000fffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* A relative 26 bit branch; the lower two bits must be zero. */
344 HOWTO (R_PPC64_REL24, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 26, /* bitsize */
348 TRUE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_signed, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_PPC64_REL24", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x03fffffc, /* dst_mask */
356 TRUE), /* pcrel_offset */
357
358 /* A relative 16 bit branch; the lower two bits must be zero. */
359 HOWTO (R_PPC64_REL14, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 TRUE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_signed, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_PPC64_REL14", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0x0000fffc, /* dst_mask */
371 TRUE), /* pcrel_offset */
372
373 /* A relative 16 bit branch. Bit 10 should be set to indicate that
374 the branch is expected to be taken. The lower two bits must be
375 zero. */
376 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_brtaken_reloc, /* special_function */
384 "R_PPC64_REL14_BRTAKEN", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x0000fffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is not expected to be taken. The lower two bits must
392 be zero. */
393 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 ppc64_elf_brtaken_reloc, /* special_function */
401 "R_PPC64_REL14_BRNTAKEN",/* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0x0000fffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
408 symbol. */
409 HOWTO (R_PPC64_GOT16, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc64_elf_unhandled_reloc, /* special_function */
417 "R_PPC64_GOT16", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC64_GOT16_LO, /* type */
426 0, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 ppc64_elf_unhandled_reloc, /* special_function */
433 "R_PPC64_GOT16_LO", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC64_GOT16_HI, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont,/* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16_HI", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_HA, /* type */
458 16, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont,/* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_HA", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC64_COPY, /* type */
477 0, /* rightshift */
478 0, /* this one is variable size */
479 0, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont, /* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC64_ADDR64, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC64_GLOB_DAT, /* type */
493 0, /* rightshift */
494 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
495 64, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 ppc64_elf_unhandled_reloc, /* special_function */
500 "R_PPC64_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 ONES (64), /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Created by the link editor. Marks a procedure linkage table
507 entry for a symbol. */
508 HOWTO (R_PPC64_JMP_SLOT, /* type */
509 0, /* rightshift */
510 0, /* size (0 = byte, 1 = short, 2 = long) */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_JMP_SLOT", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Used only by the dynamic linker. When the object is run, this
523 doubleword64 is set to the load address of the object, plus the
524 addend. */
525 HOWTO (R_PPC64_RELATIVE, /* type */
526 0, /* rightshift */
527 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
528 64, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_PPC64_RELATIVE", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 ONES (64), /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Like R_PPC64_ADDR32, but may be unaligned. */
540 HOWTO (R_PPC64_UADDR32, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_bitfield, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC64_UADDR32", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Like R_PPC64_ADDR16, but may be unaligned. */
555 HOWTO (R_PPC64_UADDR16, /* type */
556 0, /* rightshift */
557 1, /* size (0 = byte, 1 = short, 2 = long) */
558 16, /* bitsize */
559 FALSE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_bitfield, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC64_UADDR16", /* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 0xffff, /* dst_mask */
567 FALSE), /* pcrel_offset */
568
569 /* 32-bit PC relative. */
570 HOWTO (R_PPC64_REL32, /* type */
571 0, /* rightshift */
572 2, /* size (0 = byte, 1 = short, 2 = long) */
573 32, /* bitsize */
574 TRUE, /* pc_relative */
575 0, /* bitpos */
576 /* FIXME: Verify. Was complain_overflow_bitfield. */
577 complain_overflow_signed, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC64_REL32", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffffffff, /* dst_mask */
583 TRUE), /* pcrel_offset */
584
585 /* 32-bit relocation to the symbol's procedure linkage table. */
586 HOWTO (R_PPC64_PLT32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 ppc64_elf_unhandled_reloc, /* special_function */
594 "R_PPC64_PLT32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
601 FIXME: R_PPC64_PLTREL32 not supported. */
602 HOWTO (R_PPC64_PLTREL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_signed, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC64_PLTREL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
617 the symbol. */
618 HOWTO (R_PPC64_PLT16_LO, /* type */
619 0, /* rightshift */
620 1, /* size (0 = byte, 1 = short, 2 = long) */
621 16, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT16_LO", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC64_PLT16_HI, /* type */
635 16, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 ppc64_elf_unhandled_reloc, /* special_function */
642 "R_PPC64_PLT16_HI", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_HA, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_HA", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* 16-bit section relative relocation. */
665 HOWTO (R_PPC64_SECTOFF, /* type */
666 0, /* rightshift */
667 1, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_bitfield, /* complain_on_overflow */
672 ppc64_elf_sectoff_reloc, /* special_function */
673 "R_PPC64_SECTOFF", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0xffff, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679 /* Like R_PPC64_SECTOFF, but no overflow warning. */
680 HOWTO (R_PPC64_SECTOFF_LO, /* type */
681 0, /* rightshift */
682 1, /* size (0 = byte, 1 = short, 2 = long) */
683 16, /* bitsize */
684 FALSE, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_dont, /* complain_on_overflow */
687 ppc64_elf_sectoff_reloc, /* special_function */
688 "R_PPC64_SECTOFF_LO", /* name */
689 FALSE, /* partial_inplace */
690 0, /* src_mask */
691 0xffff, /* dst_mask */
692 FALSE), /* pcrel_offset */
693
694 /* 16-bit upper half section relative relocation. */
695 HOWTO (R_PPC64_SECTOFF_HI, /* type */
696 16, /* rightshift */
697 1, /* size (0 = byte, 1 = short, 2 = long) */
698 16, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_dont, /* complain_on_overflow */
702 ppc64_elf_sectoff_reloc, /* special_function */
703 "R_PPC64_SECTOFF_HI", /* name */
704 FALSE, /* partial_inplace */
705 0, /* src_mask */
706 0xffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
708
709 /* 16-bit upper half adjusted section relative relocation. */
710 HOWTO (R_PPC64_SECTOFF_HA, /* type */
711 16, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_dont, /* complain_on_overflow */
717 ppc64_elf_sectoff_ha_reloc, /* special_function */
718 "R_PPC64_SECTOFF_HA", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* Like R_PPC64_REL24 without touching the two least significant bits. */
725 HOWTO (R_PPC64_REL30, /* type */
726 2, /* rightshift */
727 2, /* size (0 = byte, 1 = short, 2 = long) */
728 30, /* bitsize */
729 TRUE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_dont, /* complain_on_overflow */
732 bfd_elf_generic_reloc, /* special_function */
733 "R_PPC64_REL30", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xfffffffc, /* dst_mask */
737 TRUE), /* pcrel_offset */
738
739 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
740
741 /* A standard 64-bit relocation. */
742 HOWTO (R_PPC64_ADDR64, /* type */
743 0, /* rightshift */
744 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
745 64, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 bfd_elf_generic_reloc, /* special_function */
750 "R_PPC64_ADDR64", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 ONES (64), /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* The bits 32-47 of an address. */
757 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
758 32, /* rightshift */
759 1, /* size (0 = byte, 1 = short, 2 = long) */
760 16, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_ADDR16_HIGHER", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xffff, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 /* The bits 32-47 of an address, plus 1 if the contents of the low
772 16 bits, treated as a signed number, is negative. */
773 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
774 32, /* rightshift */
775 1, /* size (0 = byte, 1 = short, 2 = long) */
776 16, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 ppc64_elf_ha_reloc, /* special_function */
781 "R_PPC64_ADDR16_HIGHERA", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0xffff, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* The bits 48-63 of an address. */
788 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
789 48, /* rightshift */
790 1, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC64_ADDR16_HIGHEST", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0xffff, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 /* The bits 48-63 of an address, plus 1 if the contents of the low
803 16 bits, treated as a signed number, is negative. */
804 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
805 48, /* rightshift */
806 1, /* size (0 = byte, 1 = short, 2 = long) */
807 16, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 ppc64_elf_ha_reloc, /* special_function */
812 "R_PPC64_ADDR16_HIGHESTA", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0xffff, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* Like ADDR64, but may be unaligned. */
819 HOWTO (R_PPC64_UADDR64, /* type */
820 0, /* rightshift */
821 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
822 64, /* bitsize */
823 FALSE, /* pc_relative */
824 0, /* bitpos */
825 complain_overflow_dont, /* complain_on_overflow */
826 bfd_elf_generic_reloc, /* special_function */
827 "R_PPC64_UADDR64", /* name */
828 FALSE, /* partial_inplace */
829 0, /* src_mask */
830 ONES (64), /* dst_mask */
831 FALSE), /* pcrel_offset */
832
833 /* 64-bit relative relocation. */
834 HOWTO (R_PPC64_REL64, /* type */
835 0, /* rightshift */
836 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
837 64, /* bitsize */
838 TRUE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 bfd_elf_generic_reloc, /* special_function */
842 "R_PPC64_REL64", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 ONES (64), /* dst_mask */
846 TRUE), /* pcrel_offset */
847
848 /* 64-bit relocation to the symbol's procedure linkage table. */
849 HOWTO (R_PPC64_PLT64, /* type */
850 0, /* rightshift */
851 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
852 64, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_dont, /* complain_on_overflow */
856 ppc64_elf_unhandled_reloc, /* special_function */
857 "R_PPC64_PLT64", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 ONES (64), /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* 64-bit PC relative relocation to the symbol's procedure linkage
864 table. */
865 /* FIXME: R_PPC64_PLTREL64 not supported. */
866 HOWTO (R_PPC64_PLTREL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 ppc64_elf_unhandled_reloc, /* special_function */
874 "R_PPC64_PLTREL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 16 bit TOC-relative relocation. */
881
882 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
883 HOWTO (R_PPC64_TOC16, /* type */
884 0, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_signed, /* complain_on_overflow */
890 ppc64_elf_toc_reloc, /* special_function */
891 "R_PPC64_TOC16", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* 16 bit TOC-relative relocation without overflow. */
898
899 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
900 HOWTO (R_PPC64_TOC16_LO, /* type */
901 0, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 ppc64_elf_toc_reloc, /* special_function */
908 "R_PPC64_TOC16_LO", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 0xffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 16 bit TOC-relative relocation, high 16 bits. */
915
916 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
917 HOWTO (R_PPC64_TOC16_HI, /* type */
918 16, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 ppc64_elf_toc_reloc, /* special_function */
925 "R_PPC64_TOC16_HI", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
932 contents of the low 16 bits, treated as a signed number, is
933 negative. */
934
935 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
936 HOWTO (R_PPC64_TOC16_HA, /* type */
937 16, /* rightshift */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont, /* complain_on_overflow */
943 ppc64_elf_toc_ha_reloc, /* special_function */
944 "R_PPC64_TOC16_HA", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0xffff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* 64-bit relocation; insert value of TOC base (.TOC.). */
951
952 /* R_PPC64_TOC 51 doubleword64 .TOC. */
953 HOWTO (R_PPC64_TOC, /* type */
954 0, /* rightshift */
955 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
956 64, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_bitfield, /* complain_on_overflow */
960 ppc64_elf_toc64_reloc, /* special_function */
961 "R_PPC64_TOC", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 ONES (64), /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* Like R_PPC64_GOT16, but also informs the link editor that the
968 value to relocate may (!) refer to a PLT entry which the link
969 editor (a) may replace with the symbol value. If the link editor
970 is unable to fully resolve the symbol, it may (b) create a PLT
971 entry and store the address to the new PLT entry in the GOT.
972 This permits lazy resolution of function symbols at run time.
973 The link editor may also skip all of this and just (c) emit a
974 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
975 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
976 HOWTO (R_PPC64_PLTGOT16, /* type */
977 0, /* rightshift */
978 1, /* size (0 = byte, 1 = short, 2 = long) */
979 16, /* bitsize */
980 FALSE, /* pc_relative */
981 0, /* bitpos */
982 complain_overflow_signed, /* complain_on_overflow */
983 ppc64_elf_unhandled_reloc, /* special_function */
984 "R_PPC64_PLTGOT16", /* name */
985 FALSE, /* partial_inplace */
986 0, /* src_mask */
987 0xffff, /* dst_mask */
988 FALSE), /* pcrel_offset */
989
990 /* Like R_PPC64_PLTGOT16, but without overflow. */
991 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
992 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
993 0, /* rightshift */
994 1, /* size (0 = byte, 1 = short, 2 = long) */
995 16, /* bitsize */
996 FALSE, /* pc_relative */
997 0, /* bitpos */
998 complain_overflow_dont, /* complain_on_overflow */
999 ppc64_elf_unhandled_reloc, /* special_function */
1000 "R_PPC64_PLTGOT16_LO", /* name */
1001 FALSE, /* partial_inplace */
1002 0, /* src_mask */
1003 0xffff, /* dst_mask */
1004 FALSE), /* pcrel_offset */
1005
1006 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1007 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1009 16, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_dont, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16_HI", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1023 1 if the contents of the low 16 bits, treated as a signed number,
1024 is negative. */
1025 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HA, /* 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_HA", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1041 HOWTO (R_PPC64_ADDR16_DS, /* type */
1042 0, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_bitfield, /* complain_on_overflow */
1048 bfd_elf_generic_reloc, /* special_function */
1049 "R_PPC64_ADDR16_DS", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xfffc, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1056 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1057 0, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont,/* complain_on_overflow */
1063 bfd_elf_generic_reloc, /* special_function */
1064 "R_PPC64_ADDR16_LO_DS",/* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xfffc, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1071 HOWTO (R_PPC64_GOT16_DS, /* type */
1072 0, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_signed, /* complain_on_overflow */
1078 ppc64_elf_unhandled_reloc, /* special_function */
1079 "R_PPC64_GOT16_DS", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xfffc, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1086 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1087 0, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont, /* complain_on_overflow */
1093 ppc64_elf_unhandled_reloc, /* special_function */
1094 "R_PPC64_GOT16_LO_DS", /* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xfffc, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_dont, /* complain_on_overflow */
1108 ppc64_elf_unhandled_reloc, /* special_function */
1109 "R_PPC64_PLT16_LO_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_bitfield, /* complain_on_overflow */
1123 ppc64_elf_sectoff_reloc, /* special_function */
1124 "R_PPC64_SECTOFF_DS", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_dont, /* complain_on_overflow */
1138 ppc64_elf_sectoff_reloc, /* special_function */
1139 "R_PPC64_SECTOFF_LO_DS",/* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_TOC16_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_signed, /* complain_on_overflow */
1153 ppc64_elf_toc_reloc, /* special_function */
1154 "R_PPC64_TOC16_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_toc_reloc, /* special_function */
1169 "R_PPC64_TOC16_LO_DS", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1176 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1177 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc64_elf_unhandled_reloc, /* special_function */
1185 "R_PPC64_PLTGOT16_DS", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xfffc, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1192 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1193 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_unhandled_reloc, /* special_function */
1201 "R_PPC64_PLTGOT16_LO_DS",/* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Marker reloc for TLS. */
1208 HOWTO (R_PPC64_TLS,
1209 0, /* rightshift */
1210 2, /* size (0 = byte, 1 = short, 2 = long) */
1211 32, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_dont, /* complain_on_overflow */
1215 bfd_elf_generic_reloc, /* special_function */
1216 "R_PPC64_TLS", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* Computes the load module index of the load module that contains the
1223 definition of its TLS sym. */
1224 HOWTO (R_PPC64_DTPMOD64,
1225 0, /* rightshift */
1226 4, /* size (0 = byte, 1 = short, 2 = long) */
1227 64, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_dont, /* complain_on_overflow */
1231 ppc64_elf_unhandled_reloc, /* special_function */
1232 "R_PPC64_DTPMOD64", /* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 ONES (64), /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Computes a dtv-relative displacement, the difference between the value
1239 of sym+add and the base address of the thread-local storage block that
1240 contains the definition of sym, minus 0x8000. */
1241 HOWTO (R_PPC64_DTPREL64,
1242 0, /* rightshift */
1243 4, /* size (0 = byte, 1 = short, 2 = long) */
1244 64, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 ppc64_elf_unhandled_reloc, /* special_function */
1249 "R_PPC64_DTPREL64", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 ONES (64), /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 /* A 16 bit dtprel reloc. */
1256 HOWTO (R_PPC64_DTPREL16,
1257 0, /* rightshift */
1258 1, /* size (0 = byte, 1 = short, 2 = long) */
1259 16, /* bitsize */
1260 FALSE, /* pc_relative */
1261 0, /* bitpos */
1262 complain_overflow_signed, /* complain_on_overflow */
1263 ppc64_elf_unhandled_reloc, /* special_function */
1264 "R_PPC64_DTPREL16", /* name */
1265 FALSE, /* partial_inplace */
1266 0, /* src_mask */
1267 0xffff, /* dst_mask */
1268 FALSE), /* pcrel_offset */
1269
1270 /* Like DTPREL16, but no overflow. */
1271 HOWTO (R_PPC64_DTPREL16_LO,
1272 0, /* rightshift */
1273 1, /* size (0 = byte, 1 = short, 2 = long) */
1274 16, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 ppc64_elf_unhandled_reloc, /* special_function */
1279 "R_PPC64_DTPREL16_LO", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0xffff, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1286 HOWTO (R_PPC64_DTPREL16_HI,
1287 16, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_dont, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPREL16_HI", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1301 HOWTO (R_PPC64_DTPREL16_HA,
1302 16, /* rightshift */
1303 1, /* size (0 = byte, 1 = short, 2 = long) */
1304 16, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL16_HA", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 0xffff, /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1316 HOWTO (R_PPC64_DTPREL16_HIGHER,
1317 32, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_dont, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16_HIGHER", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1331 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1332 32, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_HIGHERA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1347 48, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HIGHEST", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1362 48, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16, but for insns with a DS field. */
1376 HOWTO (R_PPC64_DTPREL16_DS,
1377 0, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_signed, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_DS", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xfffc, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_DS, but no overflow. */
1391 HOWTO (R_PPC64_DTPREL16_LO_DS,
1392 0, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_LO_DS", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xfffc, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Computes a tp-relative displacement, the difference between the value of
1406 sym+add and the value of the thread pointer (r13). */
1407 HOWTO (R_PPC64_TPREL64,
1408 0, /* rightshift */
1409 4, /* size (0 = byte, 1 = short, 2 = long) */
1410 64, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_dont, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_TPREL64", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 ONES (64), /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* A 16 bit tprel reloc. */
1422 HOWTO (R_PPC64_TPREL16,
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_TPREL16", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Like TPREL16, but no overflow. */
1437 HOWTO (R_PPC64_TPREL16_LO,
1438 0, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 16, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_dont, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_TPREL16_LO", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xffff, /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* Like TPREL16_LO, but next higher group of 16 bits. */
1452 HOWTO (R_PPC64_TPREL16_HI,
1453 16, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_dont, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_TPREL16_HI", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Like TPREL16_HI, but adjust for low 16 bits. */
1467 HOWTO (R_PPC64_TPREL16_HA,
1468 16, /* rightshift */
1469 1, /* size (0 = byte, 1 = short, 2 = long) */
1470 16, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL16_HA", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0xffff, /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* Like TPREL16_HI, but next higher group of 16 bits. */
1482 HOWTO (R_PPC64_TPREL16_HIGHER,
1483 32, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16_HIGHER", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1497 HOWTO (R_PPC64_TPREL16_HIGHERA,
1498 32, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_HIGHERA", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HIGHEST,
1513 48, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HIGHEST", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1528 48, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HIGHESTA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16, but for insns with a DS field. */
1542 HOWTO (R_PPC64_TPREL16_DS,
1543 0, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_signed, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_DS", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xfffc, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_DS, but no overflow. */
1557 HOWTO (R_PPC64_TPREL16_LO_DS,
1558 0, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_LO_DS", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xfffc, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1572 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1573 to the first entry relative to the TOC base (r2). */
1574 HOWTO (R_PPC64_GOT_TLSGD16,
1575 0, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_GOT_TLSGD16", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like GOT_TLSGD16, but no overflow. */
1589 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1590 0, /* rightshift */
1591 1, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc64_elf_unhandled_reloc, /* special_function */
1597 "R_PPC64_GOT_TLSGD16_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1604 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1605 16, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_GOT_TLSGD16_HI", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xffff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1619 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1620 16, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_GOT_TLSGD16_HA", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xffff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1634 with values (sym+add)@dtpmod and zero, and computes the offset to the
1635 first entry relative to the TOC base (r2). */
1636 HOWTO (R_PPC64_GOT_TLSLD16,
1637 0, /* rightshift */
1638 1, /* size (0 = byte, 1 = short, 2 = long) */
1639 16, /* bitsize */
1640 FALSE, /* pc_relative */
1641 0, /* bitpos */
1642 complain_overflow_signed, /* complain_on_overflow */
1643 ppc64_elf_unhandled_reloc, /* special_function */
1644 "R_PPC64_GOT_TLSLD16", /* name */
1645 FALSE, /* partial_inplace */
1646 0, /* src_mask */
1647 0xffff, /* dst_mask */
1648 FALSE), /* pcrel_offset */
1649
1650 /* Like GOT_TLSLD16, but no overflow. */
1651 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1652 0, /* rightshift */
1653 1, /* size (0 = byte, 1 = short, 2 = long) */
1654 16, /* bitsize */
1655 FALSE, /* pc_relative */
1656 0, /* bitpos */
1657 complain_overflow_dont, /* complain_on_overflow */
1658 ppc64_elf_unhandled_reloc, /* special_function */
1659 "R_PPC64_GOT_TLSLD16_LO", /* name */
1660 FALSE, /* partial_inplace */
1661 0, /* src_mask */
1662 0xffff, /* dst_mask */
1663 FALSE), /* pcrel_offset */
1664
1665 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1666 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1667 16, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_dont, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSLD16_HI", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1681 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1682 16, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSLD16_HA", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1696 the offset to the entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_DTPREL16_DS", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xfffc, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_DTPREL16_DS, but no overflow. */
1712 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xfffc, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_dont, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_DTPREL16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_DTPREL16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1757 offset to the entry relative to the TOC base (r2). */
1758 HOWTO (R_PPC64_GOT_TPREL16_DS,
1759 0, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_signed, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_TPREL16_DS", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xfffc, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_TPREL16_DS, but no overflow. */
1773 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1774 0, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xfffc, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1788 HOWTO (R_PPC64_GOT_TPREL16_HI,
1789 16, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_dont, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_TPREL16_HI", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xffff, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1803 HOWTO (R_PPC64_GOT_TPREL16_HA,
1804 16, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_TPREL16_HA", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xffff, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* GNU extension to record C++ vtable hierarchy. */
1818 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1819 0, /* rightshift */
1820 0, /* size (0 = byte, 1 = short, 2 = long) */
1821 0, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_dont, /* complain_on_overflow */
1825 NULL, /* special_function */
1826 "R_PPC64_GNU_VTINHERIT", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* GNU extension to record C++ vtable member usage. */
1833 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1834 0, /* rightshift */
1835 0, /* size (0 = byte, 1 = short, 2 = long) */
1836 0, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 NULL, /* special_function */
1841 "R_PPC64_GNU_VTENTRY", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846 };
1847
1848 \f
1849 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1850 be done. */
1851
1852 static void
1853 ppc_howto_init (void)
1854 {
1855 unsigned int i, type;
1856
1857 for (i = 0;
1858 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1859 i++)
1860 {
1861 type = ppc64_elf_howto_raw[i].type;
1862 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1863 / sizeof (ppc64_elf_howto_table[0])));
1864 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1865 }
1866 }
1867
1868 static reloc_howto_type *
1869 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1870 bfd_reloc_code_real_type code)
1871 {
1872 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1873
1874 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1875 /* Initialize howto table if needed. */
1876 ppc_howto_init ();
1877
1878 switch (code)
1879 {
1880 default:
1881 return NULL;
1882
1883 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1884 break;
1885 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1886 break;
1887 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1888 break;
1889 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1890 break;
1891 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1892 break;
1893 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1894 break;
1895 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1896 break;
1897 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1898 break;
1899 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1900 break;
1901 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1902 break;
1903 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1904 break;
1905 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1906 break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1908 break;
1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1910 break;
1911 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1912 break;
1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1914 break;
1915 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1916 break;
1917 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1918 break;
1919 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1920 break;
1921 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1922 break;
1923 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1924 break;
1925 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1926 break;
1927 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1928 break;
1929 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1930 break;
1931 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1932 break;
1933 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1934 break;
1935 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1936 break;
1937 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1938 break;
1939 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1940 break;
1941 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1942 break;
1943 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1944 break;
1945 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1946 break;
1947 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1948 break;
1949 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1954 break;
1955 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1956 break;
1957 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1958 break;
1959 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1960 break;
1961 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1962 break;
1963 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1964 break;
1965 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1968 break;
1969 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1970 break;
1971 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1972 break;
1973 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1978 break;
1979 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1980 break;
1981 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1982 break;
1983 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1984 break;
1985 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1986 break;
1987 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1988 break;
1989 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1990 break;
1991 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1992 break;
1993 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1996 break;
1997 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2002 break;
2003 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2004 break;
2005 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2006 break;
2007 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2012 break;
2013 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2014 break;
2015 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2016 break;
2017 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2024 break;
2025 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2026 break;
2027 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2048 break;
2049 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2050 break;
2051 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2056 break;
2057 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2058 break;
2059 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2068 break;
2069 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2070 break;
2071 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2080 break;
2081 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2082 break;
2083 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2084 break;
2085 }
2086
2087 return ppc64_elf_howto_table[r];
2088 };
2089
2090 /* Set the howto pointer for a PowerPC ELF reloc. */
2091
2092 static void
2093 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2094 Elf_Internal_Rela *dst)
2095 {
2096 unsigned int type;
2097
2098 /* Initialize howto table if needed. */
2099 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2100 ppc_howto_init ();
2101
2102 type = ELF64_R_TYPE (dst->r_info);
2103 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2104 / sizeof (ppc64_elf_howto_table[0])));
2105 cache_ptr->howto = ppc64_elf_howto_table[type];
2106 }
2107
2108 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2109
2110 static bfd_reloc_status_type
2111 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2112 void *data, asection *input_section,
2113 bfd *output_bfd, char **error_message)
2114 {
2115 /* If this is a relocatable link (output_bfd test tells us), just
2116 call the generic function. Any adjustment will be done at final
2117 link time. */
2118 if (output_bfd != NULL)
2119 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2120 input_section, output_bfd, error_message);
2121
2122 /* Adjust the addend for sign extension of the low 16 bits.
2123 We won't actually be using the low 16 bits, so trashing them
2124 doesn't matter. */
2125 reloc_entry->addend += 0x8000;
2126 return bfd_reloc_continue;
2127 }
2128
2129 static bfd_reloc_status_type
2130 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2131 void *data, asection *input_section,
2132 bfd *output_bfd, char **error_message)
2133 {
2134 long insn;
2135 enum elf_ppc64_reloc_type r_type;
2136 bfd_size_type octets;
2137 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2138 bfd_boolean is_power4 = FALSE;
2139
2140 /* If this is a relocatable link (output_bfd test tells us), just
2141 call the generic function. Any adjustment will be done at final
2142 link time. */
2143 if (output_bfd != NULL)
2144 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2145 input_section, output_bfd, error_message);
2146
2147 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2148 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2149 insn &= ~(0x01 << 21);
2150 r_type = reloc_entry->howto->type;
2151 if (r_type == R_PPC64_ADDR14_BRTAKEN
2152 || r_type == R_PPC64_REL14_BRTAKEN)
2153 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2154
2155 if (is_power4)
2156 {
2157 /* Set 'a' bit. This is 0b00010 in BO field for branch
2158 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2159 for branch on CTR insns (BO == 1a00t or 1a01t). */
2160 if ((insn & (0x14 << 21)) == (0x04 << 21))
2161 insn |= 0x02 << 21;
2162 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2163 insn |= 0x08 << 21;
2164 else
2165 return bfd_reloc_continue;
2166 }
2167 else
2168 {
2169 bfd_vma target = 0;
2170 bfd_vma from;
2171
2172 if (!bfd_is_com_section (symbol->section))
2173 target = symbol->value;
2174 target += symbol->section->output_section->vma;
2175 target += symbol->section->output_offset;
2176 target += reloc_entry->addend;
2177
2178 from = (reloc_entry->address
2179 + input_section->output_offset
2180 + input_section->output_section->vma);
2181
2182 /* Invert 'y' bit if not the default. */
2183 if ((bfd_signed_vma) (target - from) < 0)
2184 insn ^= 0x01 << 21;
2185 }
2186 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2187 return bfd_reloc_continue;
2188 }
2189
2190 static bfd_reloc_status_type
2191 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2192 void *data, asection *input_section,
2193 bfd *output_bfd, char **error_message)
2194 {
2195 /* If this is a relocatable link (output_bfd test tells us), just
2196 call the generic function. Any adjustment will be done at final
2197 link time. */
2198 if (output_bfd != NULL)
2199 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2200 input_section, output_bfd, error_message);
2201
2202 /* Subtract the symbol section base address. */
2203 reloc_entry->addend -= symbol->section->output_section->vma;
2204 return bfd_reloc_continue;
2205 }
2206
2207 static bfd_reloc_status_type
2208 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2209 void *data, asection *input_section,
2210 bfd *output_bfd, char **error_message)
2211 {
2212 /* If this is a relocatable link (output_bfd test tells us), just
2213 call the generic function. Any adjustment will be done at final
2214 link time. */
2215 if (output_bfd != NULL)
2216 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2217 input_section, output_bfd, error_message);
2218
2219 /* Subtract the symbol section base address. */
2220 reloc_entry->addend -= symbol->section->output_section->vma;
2221
2222 /* Adjust the addend for sign extension of the low 16 bits. */
2223 reloc_entry->addend += 0x8000;
2224 return bfd_reloc_continue;
2225 }
2226
2227 static bfd_reloc_status_type
2228 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2229 void *data, asection *input_section,
2230 bfd *output_bfd, char **error_message)
2231 {
2232 bfd_vma TOCstart;
2233
2234 /* If this is a relocatable link (output_bfd test tells us), just
2235 call the generic function. Any adjustment will be done at final
2236 link time. */
2237 if (output_bfd != NULL)
2238 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2239 input_section, output_bfd, error_message);
2240
2241 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2242 if (TOCstart == 0)
2243 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2244
2245 /* Subtract the TOC base address. */
2246 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2247 return bfd_reloc_continue;
2248 }
2249
2250 static bfd_reloc_status_type
2251 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2252 void *data, asection *input_section,
2253 bfd *output_bfd, char **error_message)
2254 {
2255 bfd_vma TOCstart;
2256
2257 /* If this is a relocatable link (output_bfd test tells us), just
2258 call the generic function. Any adjustment will be done at final
2259 link time. */
2260 if (output_bfd != NULL)
2261 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2262 input_section, output_bfd, error_message);
2263
2264 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2265 if (TOCstart == 0)
2266 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2267
2268 /* Subtract the TOC base address. */
2269 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2270
2271 /* Adjust the addend for sign extension of the low 16 bits. */
2272 reloc_entry->addend += 0x8000;
2273 return bfd_reloc_continue;
2274 }
2275
2276 static bfd_reloc_status_type
2277 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2278 void *data, asection *input_section,
2279 bfd *output_bfd, char **error_message)
2280 {
2281 bfd_vma TOCstart;
2282 bfd_size_type octets;
2283
2284 /* If this is a relocatable link (output_bfd test tells us), just
2285 call the generic function. Any adjustment will be done at final
2286 link time. */
2287 if (output_bfd != NULL)
2288 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2289 input_section, output_bfd, error_message);
2290
2291 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2292 if (TOCstart == 0)
2293 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2294
2295 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2296 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2297 return bfd_reloc_ok;
2298 }
2299
2300 static bfd_reloc_status_type
2301 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2302 void *data, asection *input_section,
2303 bfd *output_bfd, char **error_message)
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 if (error_message != NULL)
2313 {
2314 static char buf[60];
2315 sprintf (buf, "generic linker can't handle %s",
2316 reloc_entry->howto->name);
2317 *error_message = buf;
2318 }
2319 return bfd_reloc_dangerous;
2320 }
2321
2322 struct ppc64_elf_obj_tdata
2323 {
2324 struct elf_obj_tdata elf;
2325
2326 /* Shortcuts to dynamic linker sections. */
2327 asection *got;
2328 asection *relgot;
2329
2330 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2331 sections means we potentially need one of these for each input bfd. */
2332 union {
2333 bfd_signed_vma refcount;
2334 bfd_vma offset;
2335 } tlsld_got;
2336 };
2337
2338 #define ppc64_elf_tdata(bfd) \
2339 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2340
2341 #define ppc64_tlsld_got(bfd) \
2342 (&ppc64_elf_tdata (bfd)->tlsld_got)
2343
2344 /* Override the generic function because we store some extras. */
2345
2346 static bfd_boolean
2347 ppc64_elf_mkobject (bfd *abfd)
2348 {
2349 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2350 abfd->tdata.any = bfd_zalloc (abfd, amt);
2351 if (abfd->tdata.any == NULL)
2352 return FALSE;
2353 return TRUE;
2354 }
2355
2356 /* Fix bad default arch selected for a 64 bit input bfd when the
2357 default is 32 bit. */
2358
2359 static bfd_boolean
2360 ppc64_elf_object_p (bfd *abfd)
2361 {
2362 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2363 {
2364 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2365
2366 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2367 {
2368 /* Relies on arch after 32 bit default being 64 bit default. */
2369 abfd->arch_info = abfd->arch_info->next;
2370 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2371 }
2372 }
2373 return TRUE;
2374 }
2375
2376 /* Merge backend specific data from an object file to the output
2377 object file when linking. */
2378
2379 static bfd_boolean
2380 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2381 {
2382 /* Check if we have the same endianess. */
2383 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2384 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2385 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2386 {
2387 const char *msg;
2388
2389 if (bfd_big_endian (ibfd))
2390 msg = _("%s: compiled for a big endian system "
2391 "and target is little endian");
2392 else
2393 msg = _("%s: compiled for a little endian system "
2394 "and target is big endian");
2395
2396 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2397
2398 bfd_set_error (bfd_error_wrong_format);
2399 return FALSE;
2400 }
2401
2402 return TRUE;
2403 }
2404
2405 /* Add extra PPC sections. */
2406
2407 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2408 {
2409 { ".sdata", 0, NULL, 0,
2410 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2411 { ".sbss", 0, NULL, 0,
2412 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2413 { ".plt", 0, NULL, 0,
2414 SHT_NOBITS, 0 },
2415 { ".toc", 0, NULL, 0,
2416 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2417 { ".toc1", 0, NULL, 0,
2418 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2419 { ".tocbss", 0, NULL, 0,
2420 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2421 { NULL, 0, NULL, 0,
2422 0, 0 }
2423 };
2424
2425 struct _ppc64_elf_section_data
2426 {
2427 struct bfd_elf_section_data elf;
2428
2429 /* An array with one entry for each opd function descriptor. */
2430 union
2431 {
2432 /* Points to the function code section for local opd entries. */
2433 asection **func_sec;
2434 /* After editing .opd, adjust references to opd local syms. */
2435 long *adjust;
2436 } opd;
2437
2438 /* An array for toc sections, indexed by offset/8.
2439 Specifies the relocation symbol index used at a given toc offset. */
2440 unsigned *t_symndx;
2441 };
2442
2443 #define ppc64_elf_section_data(sec) \
2444 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2445
2446 static bfd_boolean
2447 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2448 {
2449 struct _ppc64_elf_section_data *sdata;
2450 bfd_size_type amt = sizeof (*sdata);
2451
2452 sdata = bfd_zalloc (abfd, amt);
2453 if (sdata == NULL)
2454 return FALSE;
2455 sec->used_by_bfd = sdata;
2456
2457 return _bfd_elf_new_section_hook (abfd, sec);
2458 }
2459 \f
2460 /* The following functions are specific to the ELF linker, while
2461 functions above are used generally. Those named ppc64_elf_* are
2462 called by the main ELF linker code. They appear in this file more
2463 or less in the order in which they are called. eg.
2464 ppc64_elf_check_relocs is called early in the link process,
2465 ppc64_elf_finish_dynamic_sections is one of the last functions
2466 called.
2467
2468 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2469 functions have both a function code symbol and a function descriptor
2470 symbol. A call to foo in a relocatable object file looks like:
2471
2472 . .text
2473 . x:
2474 . bl .foo
2475 . nop
2476
2477 The function definition in another object file might be:
2478
2479 . .section .opd
2480 . foo: .quad .foo
2481 . .quad .TOC.@tocbase
2482 . .quad 0
2483 .
2484 . .text
2485 . .foo: blr
2486
2487 When the linker resolves the call during a static link, the branch
2488 unsurprisingly just goes to .foo and the .opd information is unused.
2489 If the function definition is in a shared library, things are a little
2490 different: The call goes via a plt call stub, the opd information gets
2491 copied to the plt, and the linker patches the nop.
2492
2493 . x:
2494 . bl .foo_stub
2495 . ld 2,40(1)
2496 .
2497 .
2498 . .foo_stub:
2499 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2500 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2501 . std 2,40(1) # this is the general idea
2502 . ld 11,0(12)
2503 . ld 2,8(12)
2504 . mtctr 11
2505 . ld 11,16(12)
2506 . bctr
2507 .
2508 . .section .plt
2509 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2510
2511 The "reloc ()" notation is supposed to indicate that the linker emits
2512 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2513 copying.
2514
2515 What are the difficulties here? Well, firstly, the relocations
2516 examined by the linker in check_relocs are against the function code
2517 sym .foo, while the dynamic relocation in the plt is emitted against
2518 the function descriptor symbol, foo. Somewhere along the line, we need
2519 to carefully copy dynamic link information from one symbol to the other.
2520 Secondly, the generic part of the elf linker will make .foo a dynamic
2521 symbol as is normal for most other backends. We need foo dynamic
2522 instead, at least for an application final link. However, when
2523 creating a shared library containing foo, we need to have both symbols
2524 dynamic so that references to .foo are satisfied during the early
2525 stages of linking. Otherwise the linker might decide to pull in a
2526 definition from some other object, eg. a static library. */
2527
2528 /* The linker needs to keep track of the number of relocs that it
2529 decides to copy as dynamic relocs in check_relocs for each symbol.
2530 This is so that it can later discard them if they are found to be
2531 unnecessary. We store the information in a field extending the
2532 regular ELF linker hash table. */
2533
2534 struct ppc_dyn_relocs
2535 {
2536 struct ppc_dyn_relocs *next;
2537
2538 /* The input section of the reloc. */
2539 asection *sec;
2540
2541 /* Total number of relocs copied for the input section. */
2542 bfd_size_type count;
2543
2544 /* Number of pc-relative relocs copied for the input section. */
2545 bfd_size_type pc_count;
2546 };
2547
2548 /* Track GOT entries needed for a given symbol. We might need more
2549 than one got entry per symbol. */
2550 struct got_entry
2551 {
2552 struct got_entry *next;
2553
2554 /* The symbol addend that we'll be placing in the GOT. */
2555 bfd_vma addend;
2556
2557 /* Unlike other ELF targets, we use separate GOT entries for the same
2558 symbol referenced from different input files. This is to support
2559 automatic multiple TOC/GOT sections, where the TOC base can vary
2560 from one input file to another.
2561
2562 Point to the BFD owning this GOT entry. */
2563 bfd *owner;
2564
2565 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2566 TLS_TPREL or TLS_DTPREL for tls entries. */
2567 char tls_type;
2568
2569 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } got;
2575 };
2576
2577 /* The same for PLT. */
2578 struct plt_entry
2579 {
2580 struct plt_entry *next;
2581
2582 bfd_vma addend;
2583
2584 union
2585 {
2586 bfd_signed_vma refcount;
2587 bfd_vma offset;
2588 } plt;
2589 };
2590
2591 /* Of those relocs that might be copied as dynamic relocs, this macro
2592 selects those that must be copied when linking a shared library,
2593 even when the symbol is local. */
2594
2595 #define MUST_BE_DYN_RELOC(RTYPE) \
2596 ((RTYPE) != R_PPC64_REL32 \
2597 && (RTYPE) != R_PPC64_REL64 \
2598 && (RTYPE) != R_PPC64_REL30)
2599
2600 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2601 copying dynamic variables from a shared lib into an app's dynbss
2602 section, and instead use a dynamic relocation to point into the
2603 shared lib. With code that gcc generates, it's vital that this be
2604 enabled; In the PowerPC64 ABI, the address of a function is actually
2605 the address of a function descriptor, which resides in the .opd
2606 section. gcc uses the descriptor directly rather than going via the
2607 GOT as some other ABI's do, which means that initialized function
2608 pointers must reference the descriptor. Thus, a function pointer
2609 initialized to the address of a function in a shared library will
2610 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2611 redefines the function desctriptor symbol to point to the copy. This
2612 presents a problem as a plt entry for that function is also
2613 initialized from the function descriptor symbol and the copy reloc
2614 may not be initialized first. */
2615 #define ELIMINATE_COPY_RELOCS 1
2616
2617 /* Section name for stubs is the associated section name plus this
2618 string. */
2619 #define STUB_SUFFIX ".stub"
2620
2621 /* Linker stubs.
2622 ppc_stub_long_branch:
2623 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2624 destination, but a 24 bit branch in a stub section will reach.
2625 . b dest
2626
2627 ppc_stub_plt_branch:
2628 Similar to the above, but a 24 bit branch in the stub section won't
2629 reach its destination.
2630 . addis %r12,%r2,xxx@toc@ha
2631 . ld %r11,xxx@toc@l(%r12)
2632 . mtctr %r11
2633 . bctr
2634
2635 ppc_stub_plt_call:
2636 Used to call a function in a shared library.
2637 . addis %r12,%r2,xxx@toc@ha
2638 . std %r2,40(%r1)
2639 . ld %r11,xxx+0@toc@l(%r12)
2640 . ld %r2,xxx+8@toc@l(%r12)
2641 . mtctr %r11
2642 . ld %r11,xxx+16@toc@l(%r12)
2643 . bctr
2644
2645 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2646 code to adjust the value and save r2 to support multiple toc sections.
2647 A ppc_stub_long_branch with an r2 offset looks like:
2648 . std %r2,40(%r1)
2649 . addis %r2,%r2,off@ha
2650 . addi %r2,%r2,off@l
2651 . b dest
2652
2653 A ppc_stub_plt_branch with an r2 offset looks like:
2654 . std %r2,40(%r1)
2655 . addis %r12,%r2,xxx@toc@ha
2656 . ld %r11,xxx@toc@l(%r12)
2657 . addis %r2,%r2,off@ha
2658 . addi %r2,%r2,off@l
2659 . mtctr %r11
2660 . bctr
2661 */
2662
2663 enum ppc_stub_type {
2664 ppc_stub_none,
2665 ppc_stub_long_branch,
2666 ppc_stub_long_branch_r2off,
2667 ppc_stub_plt_branch,
2668 ppc_stub_plt_branch_r2off,
2669 ppc_stub_plt_call
2670 };
2671
2672 struct ppc_stub_hash_entry {
2673
2674 /* Base hash table entry structure. */
2675 struct bfd_hash_entry root;
2676
2677 enum ppc_stub_type stub_type;
2678
2679 /* The stub section. */
2680 asection *stub_sec;
2681
2682 /* Offset within stub_sec of the beginning of this stub. */
2683 bfd_vma stub_offset;
2684
2685 /* Given the symbol's value and its section we can determine its final
2686 value when building the stubs (so the stub knows where to jump. */
2687 bfd_vma target_value;
2688 asection *target_section;
2689
2690 /* The symbol table entry, if any, that this was derived from. */
2691 struct ppc_link_hash_entry *h;
2692
2693 /* And the reloc addend that this was derived from. */
2694 bfd_vma addend;
2695
2696 /* Where this stub is being called from, or, in the case of combined
2697 stub sections, the first input section in the group. */
2698 asection *id_sec;
2699 };
2700
2701 struct ppc_branch_hash_entry {
2702
2703 /* Base hash table entry structure. */
2704 struct bfd_hash_entry root;
2705
2706 /* Offset within .branch_lt. */
2707 unsigned int offset;
2708
2709 /* Generation marker. */
2710 unsigned int iter;
2711 };
2712
2713 struct ppc_link_hash_entry
2714 {
2715 struct elf_link_hash_entry elf;
2716
2717 /* A pointer to the most recently used stub hash entry against this
2718 symbol. */
2719 struct ppc_stub_hash_entry *stub_cache;
2720
2721 /* Track dynamic relocs copied for this symbol. */
2722 struct ppc_dyn_relocs *dyn_relocs;
2723
2724 /* Link between function code and descriptor symbols. */
2725 struct elf_link_hash_entry *oh;
2726
2727 /* Flag function code and descriptor symbols. */
2728 unsigned int is_func:1;
2729 unsigned int is_func_descriptor:1;
2730 unsigned int is_entry:1;
2731
2732 /* Contexts in which symbol is used in the GOT (or TOC).
2733 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2734 corresponding relocs are encountered during check_relocs.
2735 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2736 indicate the corresponding GOT entry type is not needed.
2737 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2738 a TPREL one. We use a separate flag rather than setting TPREL
2739 just for convenience in distinguishing the two cases. */
2740 #define TLS_GD 1 /* GD reloc. */
2741 #define TLS_LD 2 /* LD reloc. */
2742 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2743 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2744 #define TLS_TLS 16 /* Any TLS reloc. */
2745 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2746 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2747 char tls_mask;
2748 };
2749
2750 /* ppc64 ELF linker hash table. */
2751
2752 struct ppc_link_hash_table
2753 {
2754 struct elf_link_hash_table elf;
2755
2756 /* The stub hash table. */
2757 struct bfd_hash_table stub_hash_table;
2758
2759 /* Another hash table for plt_branch stubs. */
2760 struct bfd_hash_table branch_hash_table;
2761
2762 /* Linker stub bfd. */
2763 bfd *stub_bfd;
2764
2765 /* Linker call-backs. */
2766 asection * (*add_stub_section) (const char *, asection *);
2767 void (*layout_sections_again) (void);
2768
2769 /* Array to keep track of which stub sections have been created, and
2770 information on stub grouping. */
2771 struct map_stub {
2772 /* This is the section to which stubs in the group will be attached. */
2773 asection *link_sec;
2774 /* The stub section. */
2775 asection *stub_sec;
2776 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2777 bfd_vma toc_off;
2778 } *stub_group;
2779
2780 /* Support for multiple toc sections. */
2781 unsigned int no_multi_toc;
2782 unsigned int multi_toc_needed;
2783
2784 /* Temp used when calculating TOC pointers. */
2785 bfd_vma toc_curr;
2786
2787 /* Highest input section id. */
2788 int top_id;
2789
2790 /* Highest output section index. */
2791 int top_index;
2792
2793 /* List of input sections for each output section. */
2794 asection **input_list;
2795
2796 /* Short-cuts to get to dynamic linker sections. */
2797 asection *got;
2798 asection *plt;
2799 asection *relplt;
2800 asection *dynbss;
2801 asection *relbss;
2802 asection *glink;
2803 asection *sfpr;
2804 asection *brlt;
2805 asection *relbrlt;
2806
2807 /* Short-cut to first output tls section. */
2808 asection *tls_sec;
2809
2810 /* Shortcut to .__tls_get_addr. */
2811 struct elf_link_hash_entry *tls_get_addr;
2812
2813 /* Statistics. */
2814 unsigned long stub_count[ppc_stub_plt_call];
2815
2816 /* Set if we should emit symbols for stubs. */
2817 unsigned int emit_stub_syms;
2818
2819 /* Set on error. */
2820 unsigned int stub_error;
2821
2822 /* Flag set when small branches are detected. Used to
2823 select suitable defaults for the stub group size. */
2824 unsigned int has_14bit_branch;
2825
2826 /* Set if we detect a reference undefined weak symbol. */
2827 unsigned int have_undefweak;
2828
2829 /* Incremented every time we size stubs. */
2830 unsigned int stub_iteration;
2831
2832 /* Small local sym to section mapping cache. */
2833 struct sym_sec_cache sym_sec;
2834 };
2835
2836 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2837
2838 #define ppc_hash_table(p) \
2839 ((struct ppc_link_hash_table *) ((p)->hash))
2840
2841 #define ppc_stub_hash_lookup(table, string, create, copy) \
2842 ((struct ppc_stub_hash_entry *) \
2843 bfd_hash_lookup ((table), (string), (create), (copy)))
2844
2845 #define ppc_branch_hash_lookup(table, string, create, copy) \
2846 ((struct ppc_branch_hash_entry *) \
2847 bfd_hash_lookup ((table), (string), (create), (copy)))
2848
2849 /* Create an entry in the stub hash table. */
2850
2851 static struct bfd_hash_entry *
2852 stub_hash_newfunc (struct bfd_hash_entry *entry,
2853 struct bfd_hash_table *table,
2854 const char *string)
2855 {
2856 /* Allocate the structure if it has not already been allocated by a
2857 subclass. */
2858 if (entry == NULL)
2859 {
2860 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2861 if (entry == NULL)
2862 return entry;
2863 }
2864
2865 /* Call the allocation method of the superclass. */
2866 entry = bfd_hash_newfunc (entry, table, string);
2867 if (entry != NULL)
2868 {
2869 struct ppc_stub_hash_entry *eh;
2870
2871 /* Initialize the local fields. */
2872 eh = (struct ppc_stub_hash_entry *) entry;
2873 eh->stub_type = ppc_stub_none;
2874 eh->stub_sec = NULL;
2875 eh->stub_offset = 0;
2876 eh->target_value = 0;
2877 eh->target_section = NULL;
2878 eh->h = NULL;
2879 eh->id_sec = NULL;
2880 }
2881
2882 return entry;
2883 }
2884
2885 /* Create an entry in the branch hash table. */
2886
2887 static struct bfd_hash_entry *
2888 branch_hash_newfunc (struct bfd_hash_entry *entry,
2889 struct bfd_hash_table *table,
2890 const char *string)
2891 {
2892 /* Allocate the structure if it has not already been allocated by a
2893 subclass. */
2894 if (entry == NULL)
2895 {
2896 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2897 if (entry == NULL)
2898 return entry;
2899 }
2900
2901 /* Call the allocation method of the superclass. */
2902 entry = bfd_hash_newfunc (entry, table, string);
2903 if (entry != NULL)
2904 {
2905 struct ppc_branch_hash_entry *eh;
2906
2907 /* Initialize the local fields. */
2908 eh = (struct ppc_branch_hash_entry *) entry;
2909 eh->offset = 0;
2910 eh->iter = 0;
2911 }
2912
2913 return entry;
2914 }
2915
2916 /* Create an entry in a ppc64 ELF linker hash table. */
2917
2918 static struct bfd_hash_entry *
2919 link_hash_newfunc (struct bfd_hash_entry *entry,
2920 struct bfd_hash_table *table,
2921 const char *string)
2922 {
2923 /* Allocate the structure if it has not already been allocated by a
2924 subclass. */
2925 if (entry == NULL)
2926 {
2927 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2928 if (entry == NULL)
2929 return entry;
2930 }
2931
2932 /* Call the allocation method of the superclass. */
2933 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2934 if (entry != NULL)
2935 {
2936 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2937
2938 eh->stub_cache = NULL;
2939 eh->dyn_relocs = NULL;
2940 eh->oh = NULL;
2941 eh->is_func = 0;
2942 eh->is_func_descriptor = 0;
2943 eh->is_entry = 0;
2944 eh->tls_mask = 0;
2945 }
2946
2947 return entry;
2948 }
2949
2950 /* Create a ppc64 ELF linker hash table. */
2951
2952 static struct bfd_link_hash_table *
2953 ppc64_elf_link_hash_table_create (bfd *abfd)
2954 {
2955 struct ppc_link_hash_table *htab;
2956 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2957
2958 htab = bfd_zmalloc (amt);
2959 if (htab == NULL)
2960 return NULL;
2961
2962 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2963 {
2964 free (htab);
2965 return NULL;
2966 }
2967
2968 /* Init the stub hash table too. */
2969 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2970 return NULL;
2971
2972 /* And the branch hash table. */
2973 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2974 return NULL;
2975
2976 /* Initializing two fields of the union is just cosmetic. We really
2977 only care about glist, but when compiled on a 32-bit host the
2978 bfd_vma fields are larger. Setting the bfd_vma to zero makes
2979 debugger inspection of these fields look nicer. */
2980 htab->elf.init_refcount.refcount = 0;
2981 htab->elf.init_refcount.glist = NULL;
2982 htab->elf.init_offset.offset = 0;
2983 htab->elf.init_offset.glist = NULL;
2984
2985 return &htab->elf.root;
2986 }
2987
2988 /* Free the derived linker hash table. */
2989
2990 static void
2991 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
2992 {
2993 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2994
2995 bfd_hash_table_free (&ret->stub_hash_table);
2996 bfd_hash_table_free (&ret->branch_hash_table);
2997 _bfd_generic_link_hash_table_free (hash);
2998 }
2999
3000 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3001
3002 void
3003 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3004 {
3005 struct ppc_link_hash_table *htab;
3006
3007 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3008
3009 /* Always hook our dynamic sections into the first bfd, which is the
3010 linker created stub bfd. This ensures that the GOT header is at
3011 the start of the output TOC section. */
3012 htab = ppc_hash_table (info);
3013 htab->stub_bfd = abfd;
3014 htab->elf.dynobj = abfd;
3015 }
3016
3017 /* Build a name for an entry in the stub hash table. */
3018
3019 static char *
3020 ppc_stub_name (const asection *input_section,
3021 const asection *sym_sec,
3022 const struct ppc_link_hash_entry *h,
3023 const Elf_Internal_Rela *rel)
3024 {
3025 char *stub_name;
3026 bfd_size_type len;
3027
3028 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3029 offsets from a sym as a branch target? In fact, we could
3030 probably assume the addend is always zero. */
3031 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3032
3033 if (h)
3034 {
3035 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3036 stub_name = bfd_malloc (len);
3037 if (stub_name != NULL)
3038 {
3039 sprintf (stub_name, "%08x_%s+%x",
3040 input_section->id & 0xffffffff,
3041 h->elf.root.root.string,
3042 (int) rel->r_addend & 0xffffffff);
3043 }
3044 }
3045 else
3046 {
3047 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3048 stub_name = bfd_malloc (len);
3049 if (stub_name != NULL)
3050 {
3051 sprintf (stub_name, "%08x_%x:%x+%x",
3052 input_section->id & 0xffffffff,
3053 sym_sec->id & 0xffffffff,
3054 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3055 (int) rel->r_addend & 0xffffffff);
3056 }
3057 }
3058 return stub_name;
3059 }
3060
3061 /* Look up an entry in the stub hash. Stub entries are cached because
3062 creating the stub name takes a bit of time. */
3063
3064 static struct ppc_stub_hash_entry *
3065 ppc_get_stub_entry (const asection *input_section,
3066 const asection *sym_sec,
3067 struct elf_link_hash_entry *hash,
3068 const Elf_Internal_Rela *rel,
3069 struct ppc_link_hash_table *htab)
3070 {
3071 struct ppc_stub_hash_entry *stub_entry;
3072 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3073 const asection *id_sec;
3074
3075 /* If this input section is part of a group of sections sharing one
3076 stub section, then use the id of the first section in the group.
3077 Stub names need to include a section id, as there may well be
3078 more than one stub used to reach say, printf, and we need to
3079 distinguish between them. */
3080 id_sec = htab->stub_group[input_section->id].link_sec;
3081
3082 if (h != NULL && h->stub_cache != NULL
3083 && h->stub_cache->h == h
3084 && h->stub_cache->id_sec == id_sec)
3085 {
3086 stub_entry = h->stub_cache;
3087 }
3088 else
3089 {
3090 char *stub_name;
3091
3092 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3093 if (stub_name == NULL)
3094 return NULL;
3095
3096 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3097 stub_name, FALSE, FALSE);
3098 if (h != NULL)
3099 h->stub_cache = stub_entry;
3100
3101 free (stub_name);
3102 }
3103
3104 return stub_entry;
3105 }
3106
3107 /* Add a new stub entry to the stub hash. Not all fields of the new
3108 stub entry are initialised. */
3109
3110 static struct ppc_stub_hash_entry *
3111 ppc_add_stub (const char *stub_name,
3112 asection *section,
3113 struct ppc_link_hash_table *htab)
3114 {
3115 asection *link_sec;
3116 asection *stub_sec;
3117 struct ppc_stub_hash_entry *stub_entry;
3118
3119 link_sec = htab->stub_group[section->id].link_sec;
3120 stub_sec = htab->stub_group[section->id].stub_sec;
3121 if (stub_sec == NULL)
3122 {
3123 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3124 if (stub_sec == NULL)
3125 {
3126 size_t namelen;
3127 bfd_size_type len;
3128 char *s_name;
3129
3130 namelen = strlen (link_sec->name);
3131 len = namelen + sizeof (STUB_SUFFIX);
3132 s_name = bfd_alloc (htab->stub_bfd, len);
3133 if (s_name == NULL)
3134 return NULL;
3135
3136 memcpy (s_name, link_sec->name, namelen);
3137 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3138 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3139 if (stub_sec == NULL)
3140 return NULL;
3141 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3142 }
3143 htab->stub_group[section->id].stub_sec = stub_sec;
3144 }
3145
3146 /* Enter this entry into the linker stub hash table. */
3147 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3148 TRUE, FALSE);
3149 if (stub_entry == NULL)
3150 {
3151 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3152 bfd_archive_filename (section->owner),
3153 stub_name);
3154 return NULL;
3155 }
3156
3157 stub_entry->stub_sec = stub_sec;
3158 stub_entry->stub_offset = 0;
3159 stub_entry->id_sec = link_sec;
3160 return stub_entry;
3161 }
3162
3163 /* Create sections for linker generated code. */
3164
3165 static bfd_boolean
3166 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3167 {
3168 struct ppc_link_hash_table *htab;
3169 flagword flags;
3170
3171 htab = ppc_hash_table (info);
3172
3173 /* Create .sfpr for code to save and restore fp regs. */
3174 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3175 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3176 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3177 if (htab->sfpr == NULL
3178 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3179 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3180 return FALSE;
3181
3182 /* Create .glink for lazy dynamic linking support. */
3183 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3184 if (htab->glink == NULL
3185 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3186 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3187 return FALSE;
3188
3189 /* Create .branch_lt for plt_branch stubs. */
3190 flags = (SEC_ALLOC | SEC_LOAD
3191 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3192 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3193 if (htab->brlt == NULL
3194 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3195 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3196 return FALSE;
3197
3198 if (info->shared)
3199 {
3200 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3201 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3202 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3203 if (!htab->relbrlt
3204 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3205 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3206 return FALSE;
3207 }
3208 return TRUE;
3209 }
3210
3211 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3212 not already done. */
3213
3214 static bfd_boolean
3215 create_got_section (bfd *abfd, struct bfd_link_info *info)
3216 {
3217 asection *got, *relgot;
3218 flagword flags;
3219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3220
3221 if (!htab->got)
3222 {
3223 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3224 return FALSE;
3225
3226 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3227 if (!htab->got)
3228 abort ();
3229 }
3230
3231 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3232 | SEC_LINKER_CREATED);
3233
3234 got = bfd_make_section (abfd, ".got");
3235 if (!got
3236 || !bfd_set_section_flags (abfd, got, flags)
3237 || !bfd_set_section_alignment (abfd, got, 3))
3238 return FALSE;
3239
3240 relgot = bfd_make_section (abfd, ".rela.got");
3241 if (!relgot
3242 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3243 || ! bfd_set_section_alignment (abfd, relgot, 3))
3244 return FALSE;
3245
3246 ppc64_elf_tdata (abfd)->got = got;
3247 ppc64_elf_tdata (abfd)->relgot = relgot;
3248 return TRUE;
3249 }
3250
3251 /* Create the dynamic sections, and set up shortcuts. */
3252
3253 static bfd_boolean
3254 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3255 {
3256 struct ppc_link_hash_table *htab;
3257
3258 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3259 return FALSE;
3260
3261 htab = ppc_hash_table (info);
3262 if (!htab->got)
3263 htab->got = bfd_get_section_by_name (dynobj, ".got");
3264 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3265 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3266 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3267 if (!info->shared)
3268 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3269
3270 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3271 || (!info->shared && !htab->relbss))
3272 abort ();
3273
3274 return TRUE;
3275 }
3276
3277 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3278
3279 static void
3280 ppc64_elf_copy_indirect_symbol (struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3281 struct elf_link_hash_entry *dir,
3282 struct elf_link_hash_entry *ind)
3283 {
3284 struct ppc_link_hash_entry *edir, *eind;
3285 flagword mask;
3286
3287 edir = (struct ppc_link_hash_entry *) dir;
3288 eind = (struct ppc_link_hash_entry *) ind;
3289
3290 /* Copy over any dynamic relocs we may have on the indirect sym. */
3291 if (eind->dyn_relocs != NULL)
3292 {
3293 if (edir->dyn_relocs != NULL)
3294 {
3295 struct ppc_dyn_relocs **pp;
3296 struct ppc_dyn_relocs *p;
3297
3298 if (eind->elf.root.type == bfd_link_hash_indirect)
3299 abort ();
3300
3301 /* Add reloc counts against the weak sym to the strong sym
3302 list. Merge any entries against the same section. */
3303 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3304 {
3305 struct ppc_dyn_relocs *q;
3306
3307 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3308 if (q->sec == p->sec)
3309 {
3310 q->pc_count += p->pc_count;
3311 q->count += p->count;
3312 *pp = p->next;
3313 break;
3314 }
3315 if (q == NULL)
3316 pp = &p->next;
3317 }
3318 *pp = edir->dyn_relocs;
3319 }
3320
3321 edir->dyn_relocs = eind->dyn_relocs;
3322 eind->dyn_relocs = NULL;
3323 }
3324
3325 edir->is_func |= eind->is_func;
3326 edir->is_func_descriptor |= eind->is_func_descriptor;
3327 edir->is_entry |= eind->is_entry;
3328 edir->tls_mask |= eind->tls_mask;
3329
3330 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3331 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
3332 /* If called to transfer flags for a weakdef during processing
3333 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3334 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3335 if (ELIMINATE_COPY_RELOCS
3336 && eind->elf.root.type != bfd_link_hash_indirect
3337 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3338 mask &= ~ELF_LINK_NON_GOT_REF;
3339
3340 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3341
3342 /* If we were called to copy over info for a weak sym, that's all. */
3343 if (eind->elf.root.type != bfd_link_hash_indirect)
3344 return;
3345
3346 /* Copy over got entries that we may have already seen to the
3347 symbol which just became indirect. */
3348 if (eind->elf.got.glist != NULL)
3349 {
3350 if (edir->elf.got.glist != NULL)
3351 {
3352 struct got_entry **entp;
3353 struct got_entry *ent;
3354
3355 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3356 {
3357 struct got_entry *dent;
3358
3359 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3360 if (dent->addend == ent->addend
3361 && dent->owner == ent->owner
3362 && dent->tls_type == ent->tls_type)
3363 {
3364 dent->got.refcount += ent->got.refcount;
3365 *entp = ent->next;
3366 break;
3367 }
3368 if (dent == NULL)
3369 entp = &ent->next;
3370 }
3371 *entp = edir->elf.got.glist;
3372 }
3373
3374 edir->elf.got.glist = eind->elf.got.glist;
3375 eind->elf.got.glist = NULL;
3376 }
3377
3378 /* And plt entries. */
3379 if (eind->elf.plt.plist != NULL)
3380 {
3381 if (edir->elf.plt.plist != NULL)
3382 {
3383 struct plt_entry **entp;
3384 struct plt_entry *ent;
3385
3386 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3387 {
3388 struct plt_entry *dent;
3389
3390 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3391 if (dent->addend == ent->addend)
3392 {
3393 dent->plt.refcount += ent->plt.refcount;
3394 *entp = ent->next;
3395 break;
3396 }
3397 if (dent == NULL)
3398 entp = &ent->next;
3399 }
3400 *entp = edir->elf.plt.plist;
3401 }
3402
3403 edir->elf.plt.plist = eind->elf.plt.plist;
3404 eind->elf.plt.plist = NULL;
3405 }
3406
3407 if (edir->elf.dynindx == -1)
3408 {
3409 edir->elf.dynindx = eind->elf.dynindx;
3410 edir->elf.dynstr_index = eind->elf.dynstr_index;
3411 eind->elf.dynindx = -1;
3412 eind->elf.dynstr_index = 0;
3413 }
3414 else
3415 BFD_ASSERT (eind->elf.dynindx == -1);
3416 }
3417
3418 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3419 symbols undefined on the command-line. */
3420
3421 bfd_boolean
3422 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3423 {
3424 struct ppc_link_hash_table *htab;
3425 struct bfd_sym_chain *sym;
3426
3427 htab = ppc_hash_table (info);
3428 for (sym = info->gc_sym_list; sym; sym = sym->next)
3429 {
3430 struct elf_link_hash_entry *h;
3431
3432 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3433 if (h != NULL)
3434 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3435 }
3436 return TRUE;
3437 }
3438
3439 static bfd_boolean
3440 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3441 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3442 {
3443 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3444 char *local_got_tls_masks;
3445
3446 if (local_got_ents == NULL)
3447 {
3448 bfd_size_type size = symtab_hdr->sh_info;
3449
3450 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3451 local_got_ents = bfd_zalloc (abfd, size);
3452 if (local_got_ents == NULL)
3453 return FALSE;
3454 elf_local_got_ents (abfd) = local_got_ents;
3455 }
3456
3457 if ((tls_type & TLS_EXPLICIT) == 0)
3458 {
3459 struct got_entry *ent;
3460
3461 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3462 if (ent->addend == r_addend
3463 && ent->owner == abfd
3464 && ent->tls_type == tls_type)
3465 break;
3466 if (ent == NULL)
3467 {
3468 bfd_size_type amt = sizeof (*ent);
3469 ent = bfd_alloc (abfd, amt);
3470 if (ent == NULL)
3471 return FALSE;
3472 ent->next = local_got_ents[r_symndx];
3473 ent->addend = r_addend;
3474 ent->owner = abfd;
3475 ent->tls_type = tls_type;
3476 ent->got.refcount = 0;
3477 local_got_ents[r_symndx] = ent;
3478 }
3479 ent->got.refcount += 1;
3480 }
3481
3482 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3483 local_got_tls_masks[r_symndx] |= tls_type;
3484 return TRUE;
3485 }
3486
3487 static bfd_boolean
3488 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3489 {
3490 struct plt_entry *ent;
3491
3492 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3493 if (ent->addend == addend)
3494 break;
3495 if (ent == NULL)
3496 {
3497 bfd_size_type amt = sizeof (*ent);
3498 ent = bfd_alloc (abfd, amt);
3499 if (ent == NULL)
3500 return FALSE;
3501 ent->next = eh->elf.plt.plist;
3502 ent->addend = addend;
3503 ent->plt.refcount = 0;
3504 eh->elf.plt.plist = ent;
3505 }
3506 ent->plt.refcount += 1;
3507 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3508 eh->is_func = 1;
3509 return TRUE;
3510 }
3511
3512 /* Find the function descriptor hash entry from the given function code
3513 hash entry FH. Link the entries via their OH fields. */
3514 static struct ppc_link_hash_entry *
3515 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3516 {
3517 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3518
3519 if (fdh == NULL)
3520 {
3521 const char *fd_name = fh->elf.root.root.string + 1;
3522
3523 fdh = (struct ppc_link_hash_entry *)
3524 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3525 if (fdh != NULL)
3526 {
3527 fdh->is_func_descriptor = 1;
3528 fdh->oh = &fh->elf;
3529 fh->is_func = 1;
3530 fh->oh = &fdh->elf;
3531 }
3532 }
3533
3534 return fdh;
3535 }
3536
3537 /* Look through the relocs for a section during the first phase, and
3538 calculate needed space in the global offset table, procedure
3539 linkage table, and dynamic reloc sections. */
3540
3541 static bfd_boolean
3542 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3543 asection *sec, const Elf_Internal_Rela *relocs)
3544 {
3545 struct ppc_link_hash_table *htab;
3546 Elf_Internal_Shdr *symtab_hdr;
3547 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3548 const Elf_Internal_Rela *rel;
3549 const Elf_Internal_Rela *rel_end;
3550 asection *sreloc;
3551 asection **opd_sym_map;
3552
3553 if (info->relocatable)
3554 return TRUE;
3555
3556 htab = ppc_hash_table (info);
3557 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3558
3559 sym_hashes = elf_sym_hashes (abfd);
3560 sym_hashes_end = (sym_hashes
3561 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3562 - symtab_hdr->sh_info);
3563
3564 sreloc = NULL;
3565 opd_sym_map = NULL;
3566 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3567 {
3568 /* Garbage collection needs some extra help with .opd sections.
3569 We don't want to necessarily keep everything referenced by
3570 relocs in .opd, as that would keep all functions. Instead,
3571 if we reference an .opd symbol (a function descriptor), we
3572 want to keep the function code symbol's section. This is
3573 easy for global symbols, but for local syms we need to keep
3574 information about the associated function section. Later, if
3575 edit_opd deletes entries, we'll use this array to adjust
3576 local syms in .opd. */
3577 union opd_info {
3578 asection *func_section;
3579 long entry_adjust;
3580 };
3581 bfd_size_type amt;
3582
3583 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3584 opd_sym_map = bfd_zalloc (abfd, amt);
3585 if (opd_sym_map == NULL)
3586 return FALSE;
3587 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3588 }
3589
3590 if (htab->sfpr == NULL
3591 && !create_linkage_sections (htab->elf.dynobj, info))
3592 return FALSE;
3593
3594 rel_end = relocs + sec->reloc_count;
3595 for (rel = relocs; rel < rel_end; rel++)
3596 {
3597 unsigned long r_symndx;
3598 struct elf_link_hash_entry *h;
3599 enum elf_ppc64_reloc_type r_type;
3600 int tls_type = 0;
3601
3602 r_symndx = ELF64_R_SYM (rel->r_info);
3603 if (r_symndx < symtab_hdr->sh_info)
3604 h = NULL;
3605 else
3606 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3607
3608 r_type = ELF64_R_TYPE (rel->r_info);
3609 switch (r_type)
3610 {
3611 case R_PPC64_GOT_TLSLD16:
3612 case R_PPC64_GOT_TLSLD16_LO:
3613 case R_PPC64_GOT_TLSLD16_HI:
3614 case R_PPC64_GOT_TLSLD16_HA:
3615 ppc64_tlsld_got (abfd)->refcount += 1;
3616 tls_type = TLS_TLS | TLS_LD;
3617 goto dogottls;
3618
3619 case R_PPC64_GOT_TLSGD16:
3620 case R_PPC64_GOT_TLSGD16_LO:
3621 case R_PPC64_GOT_TLSGD16_HI:
3622 case R_PPC64_GOT_TLSGD16_HA:
3623 tls_type = TLS_TLS | TLS_GD;
3624 goto dogottls;
3625
3626 case R_PPC64_GOT_TPREL16_DS:
3627 case R_PPC64_GOT_TPREL16_LO_DS:
3628 case R_PPC64_GOT_TPREL16_HI:
3629 case R_PPC64_GOT_TPREL16_HA:
3630 if (info->shared)
3631 info->flags |= DF_STATIC_TLS;
3632 tls_type = TLS_TLS | TLS_TPREL;
3633 goto dogottls;
3634
3635 case R_PPC64_GOT_DTPREL16_DS:
3636 case R_PPC64_GOT_DTPREL16_LO_DS:
3637 case R_PPC64_GOT_DTPREL16_HI:
3638 case R_PPC64_GOT_DTPREL16_HA:
3639 tls_type = TLS_TLS | TLS_DTPREL;
3640 dogottls:
3641 sec->has_tls_reloc = 1;
3642 /* Fall thru */
3643
3644 case R_PPC64_GOT16:
3645 case R_PPC64_GOT16_DS:
3646 case R_PPC64_GOT16_HA:
3647 case R_PPC64_GOT16_HI:
3648 case R_PPC64_GOT16_LO:
3649 case R_PPC64_GOT16_LO_DS:
3650 /* This symbol requires a global offset table entry. */
3651 sec->has_gp_reloc = 1;
3652 if (ppc64_elf_tdata (abfd)->got == NULL
3653 && !create_got_section (abfd, info))
3654 return FALSE;
3655
3656 if (h != NULL)
3657 {
3658 struct ppc_link_hash_entry *eh;
3659 struct got_entry *ent;
3660
3661 eh = (struct ppc_link_hash_entry *) h;
3662 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3663 if (ent->addend == rel->r_addend
3664 && ent->owner == abfd
3665 && ent->tls_type == tls_type)
3666 break;
3667 if (ent == NULL)
3668 {
3669 bfd_size_type amt = sizeof (*ent);
3670 ent = bfd_alloc (abfd, amt);
3671 if (ent == NULL)
3672 return FALSE;
3673 ent->next = eh->elf.got.glist;
3674 ent->addend = rel->r_addend;
3675 ent->owner = abfd;
3676 ent->tls_type = tls_type;
3677 ent->got.refcount = 0;
3678 eh->elf.got.glist = ent;
3679 }
3680 ent->got.refcount += 1;
3681 eh->tls_mask |= tls_type;
3682 }
3683 else
3684 /* This is a global offset table entry for a local symbol. */
3685 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3686 rel->r_addend, tls_type))
3687 return FALSE;
3688 break;
3689
3690 case R_PPC64_PLT16_HA:
3691 case R_PPC64_PLT16_HI:
3692 case R_PPC64_PLT16_LO:
3693 case R_PPC64_PLT32:
3694 case R_PPC64_PLT64:
3695 /* This symbol requires a procedure linkage table entry. We
3696 actually build the entry in adjust_dynamic_symbol,
3697 because this might be a case of linking PIC code without
3698 linking in any dynamic objects, in which case we don't
3699 need to generate a procedure linkage table after all. */
3700 if (h == NULL)
3701 {
3702 /* It does not make sense to have a procedure linkage
3703 table entry for a local symbol. */
3704 bfd_set_error (bfd_error_bad_value);
3705 return FALSE;
3706 }
3707 else
3708 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3709 rel->r_addend))
3710 return FALSE;
3711 break;
3712
3713 /* The following relocations don't need to propagate the
3714 relocation if linking a shared object since they are
3715 section relative. */
3716 case R_PPC64_SECTOFF:
3717 case R_PPC64_SECTOFF_LO:
3718 case R_PPC64_SECTOFF_HI:
3719 case R_PPC64_SECTOFF_HA:
3720 case R_PPC64_SECTOFF_DS:
3721 case R_PPC64_SECTOFF_LO_DS:
3722 case R_PPC64_DTPREL16:
3723 case R_PPC64_DTPREL16_LO:
3724 case R_PPC64_DTPREL16_HI:
3725 case R_PPC64_DTPREL16_HA:
3726 case R_PPC64_DTPREL16_DS:
3727 case R_PPC64_DTPREL16_LO_DS:
3728 case R_PPC64_DTPREL16_HIGHER:
3729 case R_PPC64_DTPREL16_HIGHERA:
3730 case R_PPC64_DTPREL16_HIGHEST:
3731 case R_PPC64_DTPREL16_HIGHESTA:
3732 break;
3733
3734 /* Nor do these. */
3735 case R_PPC64_TOC16:
3736 case R_PPC64_TOC16_LO:
3737 case R_PPC64_TOC16_HI:
3738 case R_PPC64_TOC16_HA:
3739 case R_PPC64_TOC16_DS:
3740 case R_PPC64_TOC16_LO_DS:
3741 sec->has_gp_reloc = 1;
3742 break;
3743
3744 /* This relocation describes the C++ object vtable hierarchy.
3745 Reconstruct it for later use during GC. */
3746 case R_PPC64_GNU_VTINHERIT:
3747 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3748 return FALSE;
3749 break;
3750
3751 /* This relocation describes which C++ vtable entries are actually
3752 used. Record for later use during GC. */
3753 case R_PPC64_GNU_VTENTRY:
3754 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3755 return FALSE;
3756 break;
3757
3758 case R_PPC64_REL14:
3759 case R_PPC64_REL14_BRTAKEN:
3760 case R_PPC64_REL14_BRNTAKEN:
3761 htab->has_14bit_branch = 1;
3762 /* Fall through. */
3763
3764 case R_PPC64_REL24:
3765 if (h != NULL
3766 && h->root.root.string[0] == '.'
3767 && h->root.root.string[1] != 0)
3768 {
3769 /* We may need a .plt entry if the function this reloc
3770 refers to is in a shared lib. */
3771 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3772 rel->r_addend))
3773 return FALSE;
3774 if (h == htab->tls_get_addr)
3775 sec->has_tls_reloc = 1;
3776 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3777 == 0)
3778 && (h->root.root.string[15] == 0
3779 || h->root.root.string[15] == '@'))
3780 {
3781 htab->tls_get_addr = h;
3782 sec->has_tls_reloc = 1;
3783 }
3784 }
3785 break;
3786
3787 case R_PPC64_TPREL64:
3788 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3789 if (info->shared)
3790 info->flags |= DF_STATIC_TLS;
3791 goto dotlstoc;
3792
3793 case R_PPC64_DTPMOD64:
3794 if (rel + 1 < rel_end
3795 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3796 && rel[1].r_offset == rel->r_offset + 8)
3797 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3798 else
3799 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3800 goto dotlstoc;
3801
3802 case R_PPC64_DTPREL64:
3803 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3804 if (rel != relocs
3805 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3806 && rel[-1].r_offset == rel->r_offset - 8)
3807 /* This is the second reloc of a dtpmod, dtprel pair.
3808 Don't mark with TLS_DTPREL. */
3809 goto dodyn;
3810
3811 dotlstoc:
3812 sec->has_tls_reloc = 1;
3813 if (h != NULL)
3814 {
3815 struct ppc_link_hash_entry *eh;
3816 eh = (struct ppc_link_hash_entry *) h;
3817 eh->tls_mask |= tls_type;
3818 }
3819 else
3820 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3821 rel->r_addend, tls_type))
3822 return FALSE;
3823
3824 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3825 {
3826 /* One extra to simplify get_tls_mask. */
3827 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3828 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3829 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3830 return FALSE;
3831 }
3832 BFD_ASSERT (rel->r_offset % 8 == 0);
3833 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3834
3835 /* Mark the second slot of a GD or LD entry.
3836 -1 to indicate GD and -2 to indicate LD. */
3837 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3838 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3839 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3840 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3841 goto dodyn;
3842
3843 case R_PPC64_TPREL16:
3844 case R_PPC64_TPREL16_LO:
3845 case R_PPC64_TPREL16_HI:
3846 case R_PPC64_TPREL16_HA:
3847 case R_PPC64_TPREL16_DS:
3848 case R_PPC64_TPREL16_LO_DS:
3849 case R_PPC64_TPREL16_HIGHER:
3850 case R_PPC64_TPREL16_HIGHERA:
3851 case R_PPC64_TPREL16_HIGHEST:
3852 case R_PPC64_TPREL16_HIGHESTA:
3853 if (info->shared)
3854 {
3855 info->flags |= DF_STATIC_TLS;
3856 goto dodyn;
3857 }
3858 break;
3859
3860 case R_PPC64_ADDR64:
3861 if (opd_sym_map != NULL
3862 && h != NULL
3863 && h->root.root.string[0] == '.'
3864 && h->root.root.string[1] != 0)
3865 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3866
3867 if (opd_sym_map != NULL
3868 && h == NULL
3869 && rel + 1 < rel_end
3870 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3871 {
3872 asection *s;
3873
3874 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3875 r_symndx);
3876 if (s == NULL)
3877 return FALSE;
3878 else if (s != sec)
3879 opd_sym_map[rel->r_offset / 24] = s;
3880 }
3881 /* Fall through. */
3882
3883 case R_PPC64_REL30:
3884 case R_PPC64_REL32:
3885 case R_PPC64_REL64:
3886 case R_PPC64_ADDR14:
3887 case R_PPC64_ADDR14_BRNTAKEN:
3888 case R_PPC64_ADDR14_BRTAKEN:
3889 case R_PPC64_ADDR16:
3890 case R_PPC64_ADDR16_DS:
3891 case R_PPC64_ADDR16_HA:
3892 case R_PPC64_ADDR16_HI:
3893 case R_PPC64_ADDR16_HIGHER:
3894 case R_PPC64_ADDR16_HIGHERA:
3895 case R_PPC64_ADDR16_HIGHEST:
3896 case R_PPC64_ADDR16_HIGHESTA:
3897 case R_PPC64_ADDR16_LO:
3898 case R_PPC64_ADDR16_LO_DS:
3899 case R_PPC64_ADDR24:
3900 case R_PPC64_ADDR32:
3901 case R_PPC64_UADDR16:
3902 case R_PPC64_UADDR32:
3903 case R_PPC64_UADDR64:
3904 case R_PPC64_TOC:
3905 if (h != NULL && !info->shared)
3906 /* We may need a copy reloc. */
3907 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3908
3909 /* Don't propagate .opd relocs. */
3910 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3911 break;
3912
3913 /* Don't propagate relocs that the dynamic linker won't relocate. */
3914 if ((sec->flags & SEC_ALLOC) == 0)
3915 break;
3916
3917 /* If we are creating a shared library, and this is a reloc
3918 against a global symbol, or a non PC relative reloc
3919 against a local symbol, then we need to copy the reloc
3920 into the shared library. However, if we are linking with
3921 -Bsymbolic, we do not need to copy a reloc against a
3922 global symbol which is defined in an object we are
3923 including in the link (i.e., DEF_REGULAR is set). At
3924 this point we have not seen all the input files, so it is
3925 possible that DEF_REGULAR is not set now but will be set
3926 later (it is never cleared). In case of a weak definition,
3927 DEF_REGULAR may be cleared later by a strong definition in
3928 a shared library. We account for that possibility below by
3929 storing information in the dyn_relocs field of the hash
3930 table entry. A similar situation occurs when creating
3931 shared libraries and symbol visibility changes render the
3932 symbol local.
3933
3934 If on the other hand, we are creating an executable, we
3935 may need to keep relocations for symbols satisfied by a
3936 dynamic library if we manage to avoid copy relocs for the
3937 symbol. */
3938 dodyn:
3939 if ((info->shared
3940 && (MUST_BE_DYN_RELOC (r_type)
3941 || (h != NULL
3942 && (! info->symbolic
3943 || h->root.type == bfd_link_hash_defweak
3944 || (h->elf_link_hash_flags
3945 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3946 || (ELIMINATE_COPY_RELOCS
3947 && !info->shared
3948 && h != NULL
3949 && (h->root.type == bfd_link_hash_defweak
3950 || (h->elf_link_hash_flags
3951 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3952 {
3953 struct ppc_dyn_relocs *p;
3954 struct ppc_dyn_relocs **head;
3955
3956 /* We must copy these reloc types into the output file.
3957 Create a reloc section in dynobj and make room for
3958 this reloc. */
3959 if (sreloc == NULL)
3960 {
3961 const char *name;
3962 bfd *dynobj;
3963
3964 name = (bfd_elf_string_from_elf_section
3965 (abfd,
3966 elf_elfheader (abfd)->e_shstrndx,
3967 elf_section_data (sec)->rel_hdr.sh_name));
3968 if (name == NULL)
3969 return FALSE;
3970
3971 if (strncmp (name, ".rela", 5) != 0
3972 || strcmp (bfd_get_section_name (abfd, sec),
3973 name + 5) != 0)
3974 {
3975 (*_bfd_error_handler)
3976 (_("%s: bad relocation section name `%s\'"),
3977 bfd_archive_filename (abfd), name);
3978 bfd_set_error (bfd_error_bad_value);
3979 }
3980
3981 dynobj = htab->elf.dynobj;
3982 sreloc = bfd_get_section_by_name (dynobj, name);
3983 if (sreloc == NULL)
3984 {
3985 flagword flags;
3986
3987 sreloc = bfd_make_section (dynobj, name);
3988 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3989 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3990 if ((sec->flags & SEC_ALLOC) != 0)
3991 flags |= SEC_ALLOC | SEC_LOAD;
3992 if (sreloc == NULL
3993 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3994 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
3995 return FALSE;
3996 }
3997 elf_section_data (sec)->sreloc = sreloc;
3998 }
3999
4000 /* If this is a global symbol, we count the number of
4001 relocations we need for this symbol. */
4002 if (h != NULL)
4003 {
4004 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4005 }
4006 else
4007 {
4008 /* Track dynamic relocs needed for local syms too.
4009 We really need local syms available to do this
4010 easily. Oh well. */
4011
4012 asection *s;
4013 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4014 sec, r_symndx);
4015 if (s == NULL)
4016 return FALSE;
4017
4018 head = ((struct ppc_dyn_relocs **)
4019 &elf_section_data (s)->local_dynrel);
4020 }
4021
4022 p = *head;
4023 if (p == NULL || p->sec != sec)
4024 {
4025 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4026 if (p == NULL)
4027 return FALSE;
4028 p->next = *head;
4029 *head = p;
4030 p->sec = sec;
4031 p->count = 0;
4032 p->pc_count = 0;
4033 }
4034
4035 p->count += 1;
4036 if (!MUST_BE_DYN_RELOC (r_type))
4037 p->pc_count += 1;
4038 }
4039 break;
4040
4041 default:
4042 break;
4043 }
4044 }
4045
4046 return TRUE;
4047 }
4048
4049 /* Return the section that should be marked against GC for a given
4050 relocation. */
4051
4052 static asection *
4053 ppc64_elf_gc_mark_hook (asection *sec,
4054 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4055 Elf_Internal_Rela *rel,
4056 struct elf_link_hash_entry *h,
4057 Elf_Internal_Sym *sym)
4058 {
4059 asection *rsec = NULL;
4060
4061 if (h != NULL)
4062 {
4063 enum elf_ppc64_reloc_type r_type;
4064 struct ppc_link_hash_entry *fdh;
4065
4066 r_type = ELF64_R_TYPE (rel->r_info);
4067 switch (r_type)
4068 {
4069 case R_PPC64_GNU_VTINHERIT:
4070 case R_PPC64_GNU_VTENTRY:
4071 break;
4072
4073 default:
4074 switch (h->root.type)
4075 {
4076 case bfd_link_hash_defined:
4077 case bfd_link_hash_defweak:
4078 fdh = (struct ppc_link_hash_entry *) h;
4079
4080 /* Function descriptor syms cause the associated
4081 function code sym section to be marked. */
4082 if (fdh->is_func_descriptor)
4083 rsec = fdh->oh->root.u.def.section;
4084
4085 /* Function entry syms return NULL if they are in .opd
4086 and are not ._start (or others undefined on the ld
4087 command line). Thus we avoid marking all function
4088 sections, as all functions are referenced in .opd. */
4089 else if ((fdh->oh != NULL
4090 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4091 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4092 rsec = h->root.u.def.section;
4093 break;
4094
4095 case bfd_link_hash_common:
4096 rsec = h->root.u.c.p->section;
4097 break;
4098
4099 default:
4100 break;
4101 }
4102 }
4103 }
4104 else
4105 {
4106 asection **opd_sym_section;
4107
4108 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4109 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4110 if (opd_sym_section != NULL)
4111 rsec = opd_sym_section[sym->st_value / 24];
4112 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4113 rsec = NULL;
4114 }
4115
4116 return rsec;
4117 }
4118
4119 /* Update the .got, .plt. and dynamic reloc reference counts for the
4120 section being removed. */
4121
4122 static bfd_boolean
4123 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4124 asection *sec, const Elf_Internal_Rela *relocs)
4125 {
4126 struct ppc_link_hash_table *htab;
4127 Elf_Internal_Shdr *symtab_hdr;
4128 struct elf_link_hash_entry **sym_hashes;
4129 struct got_entry **local_got_ents;
4130 const Elf_Internal_Rela *rel, *relend;
4131
4132 elf_section_data (sec)->local_dynrel = NULL;
4133
4134 htab = ppc_hash_table (info);
4135 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4136 sym_hashes = elf_sym_hashes (abfd);
4137 local_got_ents = elf_local_got_ents (abfd);
4138
4139 relend = relocs + sec->reloc_count;
4140 for (rel = relocs; rel < relend; rel++)
4141 {
4142 unsigned long r_symndx;
4143 enum elf_ppc64_reloc_type r_type;
4144 struct elf_link_hash_entry *h = NULL;
4145 char tls_type = 0;
4146
4147 r_symndx = ELF64_R_SYM (rel->r_info);
4148 r_type = ELF64_R_TYPE (rel->r_info);
4149 if (r_symndx >= symtab_hdr->sh_info)
4150 {
4151 struct ppc_link_hash_entry *eh;
4152 struct ppc_dyn_relocs **pp;
4153 struct ppc_dyn_relocs *p;
4154
4155 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4156 eh = (struct ppc_link_hash_entry *) h;
4157
4158 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4159 if (p->sec == sec)
4160 {
4161 /* Everything must go for SEC. */
4162 *pp = p->next;
4163 break;
4164 }
4165 }
4166
4167 switch (r_type)
4168 {
4169 case R_PPC64_GOT_TLSLD16:
4170 case R_PPC64_GOT_TLSLD16_LO:
4171 case R_PPC64_GOT_TLSLD16_HI:
4172 case R_PPC64_GOT_TLSLD16_HA:
4173 ppc64_tlsld_got (abfd)->refcount -= 1;
4174 tls_type = TLS_TLS | TLS_LD;
4175 goto dogot;
4176
4177 case R_PPC64_GOT_TLSGD16:
4178 case R_PPC64_GOT_TLSGD16_LO:
4179 case R_PPC64_GOT_TLSGD16_HI:
4180 case R_PPC64_GOT_TLSGD16_HA:
4181 tls_type = TLS_TLS | TLS_GD;
4182 goto dogot;
4183
4184 case R_PPC64_GOT_TPREL16_DS:
4185 case R_PPC64_GOT_TPREL16_LO_DS:
4186 case R_PPC64_GOT_TPREL16_HI:
4187 case R_PPC64_GOT_TPREL16_HA:
4188 tls_type = TLS_TLS | TLS_TPREL;
4189 goto dogot;
4190
4191 case R_PPC64_GOT_DTPREL16_DS:
4192 case R_PPC64_GOT_DTPREL16_LO_DS:
4193 case R_PPC64_GOT_DTPREL16_HI:
4194 case R_PPC64_GOT_DTPREL16_HA:
4195 tls_type = TLS_TLS | TLS_DTPREL;
4196 goto dogot;
4197
4198 case R_PPC64_GOT16:
4199 case R_PPC64_GOT16_DS:
4200 case R_PPC64_GOT16_HA:
4201 case R_PPC64_GOT16_HI:
4202 case R_PPC64_GOT16_LO:
4203 case R_PPC64_GOT16_LO_DS:
4204 dogot:
4205 {
4206 struct got_entry *ent;
4207
4208 if (h != NULL)
4209 ent = h->got.glist;
4210 else
4211 ent = local_got_ents[r_symndx];
4212
4213 for (; ent != NULL; ent = ent->next)
4214 if (ent->addend == rel->r_addend
4215 && ent->owner == abfd
4216 && ent->tls_type == tls_type)
4217 break;
4218 if (ent == NULL)
4219 abort ();
4220 if (ent->got.refcount > 0)
4221 ent->got.refcount -= 1;
4222 }
4223 break;
4224
4225 case R_PPC64_PLT16_HA:
4226 case R_PPC64_PLT16_HI:
4227 case R_PPC64_PLT16_LO:
4228 case R_PPC64_PLT32:
4229 case R_PPC64_PLT64:
4230 case R_PPC64_REL14:
4231 case R_PPC64_REL14_BRNTAKEN:
4232 case R_PPC64_REL14_BRTAKEN:
4233 case R_PPC64_REL24:
4234 if (h != NULL)
4235 {
4236 struct plt_entry *ent;
4237
4238 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4239 if (ent->addend == rel->r_addend)
4240 break;
4241 if (ent == NULL)
4242 abort ();
4243 if (ent->plt.refcount > 0)
4244 ent->plt.refcount -= 1;
4245 }
4246 break;
4247
4248 default:
4249 break;
4250 }
4251 }
4252 return TRUE;
4253 }
4254
4255 /* Called via elf_link_hash_traverse to transfer dynamic linking
4256 information on function code symbol entries to their corresponding
4257 function descriptor symbol entries. */
4258 static bfd_boolean
4259 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4260 {
4261 struct bfd_link_info *info;
4262 struct ppc_link_hash_table *htab;
4263 struct plt_entry *ent;
4264 struct ppc_link_hash_entry *fh;
4265 struct ppc_link_hash_entry *fdh;
4266 bfd_boolean force_local;
4267
4268 fh = (struct ppc_link_hash_entry *) h;
4269 if (fh->elf.root.type == bfd_link_hash_indirect)
4270 return TRUE;
4271
4272 if (fh->elf.root.type == bfd_link_hash_warning)
4273 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4274
4275 info = inf;
4276 htab = ppc_hash_table (info);
4277
4278 /* If this is a function code symbol, transfer dynamic linking
4279 information to the function descriptor symbol. */
4280 if (!fh->is_func)
4281 return TRUE;
4282
4283 if (fh->elf.root.type == bfd_link_hash_undefweak
4284 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4285 htab->have_undefweak = TRUE;
4286
4287 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4288 if (ent->plt.refcount > 0)
4289 break;
4290 if (ent == NULL
4291 || fh->elf.root.root.string[0] != '.'
4292 || fh->elf.root.root.string[1] == '\0')
4293 return TRUE;
4294
4295 /* Find the corresponding function descriptor symbol. Create it
4296 as undefined if necessary. */
4297
4298 fdh = get_fdh (fh, htab);
4299 if (fdh != NULL)
4300 while (fdh->elf.root.type == bfd_link_hash_indirect
4301 || fdh->elf.root.type == bfd_link_hash_warning)
4302 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4303
4304 if (fdh == NULL
4305 && info->shared
4306 && (fh->elf.root.type == bfd_link_hash_undefined
4307 || fh->elf.root.type == bfd_link_hash_undefweak))
4308 {
4309 bfd *abfd;
4310 asymbol *newsym;
4311 struct bfd_link_hash_entry *bh;
4312
4313 abfd = fh->elf.root.u.undef.abfd;
4314 newsym = bfd_make_empty_symbol (abfd);
4315 newsym->name = fh->elf.root.root.string + 1;
4316 newsym->section = bfd_und_section_ptr;
4317 newsym->value = 0;
4318 newsym->flags = BSF_OBJECT;
4319 if (fh->elf.root.type == bfd_link_hash_undefweak)
4320 newsym->flags |= BSF_WEAK;
4321
4322 bh = &fdh->elf.root;
4323 if ( !(_bfd_generic_link_add_one_symbol
4324 (info, abfd, newsym->name, newsym->flags,
4325 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4326 {
4327 return FALSE;
4328 }
4329 fdh = (struct ppc_link_hash_entry *) bh;
4330 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4331 fdh->elf.size = 24;
4332 fdh->elf.type = STT_OBJECT;
4333 }
4334
4335 if (fdh != NULL
4336 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4337 && (info->shared
4338 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4339 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4340 || (fdh->elf.root.type == bfd_link_hash_undefweak
4341 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4342 {
4343 if (fdh->elf.dynindx == -1)
4344 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4345 return FALSE;
4346 fdh->elf.elf_link_hash_flags
4347 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4348 | ELF_LINK_HASH_REF_DYNAMIC
4349 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4350 | ELF_LINK_NON_GOT_REF));
4351 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4352 {
4353 fdh->elf.plt.plist = fh->elf.plt.plist;
4354 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4355 }
4356 fdh->is_func_descriptor = 1;
4357 fdh->oh = &fh->elf;
4358 fh->oh = &fdh->elf;
4359 }
4360
4361 /* Now that the info is on the function descriptor, clear the
4362 function code sym info. Any function code syms for which we
4363 don't have a definition in a regular file, we force local.
4364 This prevents a shared library from exporting syms that have
4365 been imported from another library. Function code syms that
4366 are really in the library we must leave global to prevent the
4367 linker dragging in a definition from a static library. */
4368 force_local
4369 = (info->shared
4370 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4371 || fdh == NULL
4372 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4373 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4374 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4375
4376 return TRUE;
4377 }
4378
4379 #define MIN_SAVE_FPR 14
4380 #define MAX_SAVE_FPR 31
4381
4382 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4383 this hook to a) provide some gcc support functions, and b) transfer
4384 dynamic linking information gathered so far on function code symbol
4385 entries, to their corresponding function descriptor symbol entries. */
4386 static bfd_boolean
4387 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4388 struct bfd_link_info *info)
4389 {
4390 struct ppc_link_hash_table *htab;
4391 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4392 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4393 unsigned int i;
4394 struct elf_link_hash_entry *h;
4395 bfd_byte *p;
4396 char sym[10];
4397
4398 htab = ppc_hash_table (info);
4399
4400 if (htab->sfpr == NULL)
4401 /* We don't have any relocs. */
4402 return TRUE;
4403
4404 /* First provide any missing ._savef* and ._restf* functions. */
4405 memcpy (sym, "._savef14", 10);
4406 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4407 {
4408 sym[7] = i / 10 + '0';
4409 sym[8] = i % 10 + '0';
4410 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4411 if (h != NULL
4412 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4413 {
4414 if (lowest_savef > i)
4415 lowest_savef = i;
4416 h->root.type = bfd_link_hash_defined;
4417 h->root.u.def.section = htab->sfpr;
4418 h->root.u.def.value = (i - lowest_savef) * 4;
4419 h->type = STT_FUNC;
4420 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4421 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4422 }
4423 }
4424
4425 memcpy (sym, "._restf14", 10);
4426 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4427 {
4428 sym[7] = i / 10 + '0';
4429 sym[8] = i % 10 + '0';
4430 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4431 if (h != NULL
4432 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4433 {
4434 if (lowest_restf > i)
4435 lowest_restf = i;
4436 h->root.type = bfd_link_hash_defined;
4437 h->root.u.def.section = htab->sfpr;
4438 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4439 + (i - lowest_restf) * 4);
4440 h->type = STT_FUNC;
4441 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4442 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4443 }
4444 }
4445
4446 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4447
4448 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4449 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4450
4451 if (htab->sfpr->_raw_size == 0)
4452 {
4453 if (!htab->have_undefweak)
4454 {
4455 _bfd_strip_section_from_output (info, htab->sfpr);
4456 return TRUE;
4457 }
4458
4459 htab->sfpr->_raw_size = 4;
4460 }
4461
4462 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4463 if (p == NULL)
4464 return FALSE;
4465 htab->sfpr->contents = p;
4466
4467 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4468 {
4469 unsigned int fpr = i << 21;
4470 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4471 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4472 p += 4;
4473 }
4474 if (lowest_savef <= MAX_SAVE_FPR)
4475 {
4476 bfd_put_32 (htab->elf.dynobj, BLR, p);
4477 p += 4;
4478 }
4479
4480 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4481 {
4482 unsigned int fpr = i << 21;
4483 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4484 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4485 p += 4;
4486 }
4487 if (lowest_restf <= MAX_SAVE_FPR
4488 || htab->sfpr->_raw_size == 4)
4489 {
4490 bfd_put_32 (htab->elf.dynobj, BLR, p);
4491 }
4492
4493 return TRUE;
4494 }
4495
4496 /* Adjust a symbol defined by a dynamic object and referenced by a
4497 regular object. The current definition is in some section of the
4498 dynamic object, but we're not including those sections. We have to
4499 change the definition to something the rest of the link can
4500 understand. */
4501
4502 static bfd_boolean
4503 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4504 struct elf_link_hash_entry *h)
4505 {
4506 struct ppc_link_hash_table *htab;
4507 asection *s;
4508 unsigned int power_of_two;
4509
4510 htab = ppc_hash_table (info);
4511
4512 /* Deal with function syms. */
4513 if (h->type == STT_FUNC
4514 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4515 {
4516 /* Clear procedure linkage table information for any symbol that
4517 won't need a .plt entry. */
4518 struct plt_entry *ent;
4519 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4520 if (ent->plt.refcount > 0)
4521 break;
4522 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4523 || ent == NULL
4524 || SYMBOL_CALLS_LOCAL (info, h)
4525 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4526 && h->root.type == bfd_link_hash_undefweak))
4527 {
4528 h->plt.plist = NULL;
4529 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4530 }
4531 }
4532 else
4533 h->plt.plist = NULL;
4534
4535 /* If this is a weak symbol, and there is a real definition, the
4536 processor independent code will have arranged for us to see the
4537 real definition first, and we can just use the same value. */
4538 if (h->weakdef != NULL)
4539 {
4540 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4541 || h->weakdef->root.type == bfd_link_hash_defweak);
4542 h->root.u.def.section = h->weakdef->root.u.def.section;
4543 h->root.u.def.value = h->weakdef->root.u.def.value;
4544 if (ELIMINATE_COPY_RELOCS)
4545 h->elf_link_hash_flags
4546 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4547 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4548 return TRUE;
4549 }
4550
4551 /* If we are creating a shared library, we must presume that the
4552 only references to the symbol are via the global offset table.
4553 For such cases we need not do anything here; the relocations will
4554 be handled correctly by relocate_section. */
4555 if (info->shared)
4556 return TRUE;
4557
4558 /* If there are no references to this symbol that do not use the
4559 GOT, we don't need to generate a copy reloc. */
4560 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4561 return TRUE;
4562
4563 if (ELIMINATE_COPY_RELOCS)
4564 {
4565 struct ppc_link_hash_entry * eh;
4566 struct ppc_dyn_relocs *p;
4567
4568 eh = (struct ppc_link_hash_entry *) h;
4569 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4570 {
4571 s = p->sec->output_section;
4572 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4573 break;
4574 }
4575
4576 /* If we didn't find any dynamic relocs in read-only sections, then
4577 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4578 if (p == NULL)
4579 {
4580 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4581 return TRUE;
4582 }
4583 }
4584
4585 if (h->plt.plist != NULL)
4586 return TRUE;
4587
4588 /* This is a reference to a symbol defined by a dynamic object which
4589 is not a function. */
4590
4591 /* We must allocate the symbol in our .dynbss section, which will
4592 become part of the .bss section of the executable. There will be
4593 an entry for this symbol in the .dynsym section. The dynamic
4594 object will contain position independent code, so all references
4595 from the dynamic object to this symbol will go through the global
4596 offset table. The dynamic linker will use the .dynsym entry to
4597 determine the address it must put in the global offset table, so
4598 both the dynamic object and the regular object will refer to the
4599 same memory location for the variable. */
4600
4601 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4602 to copy the initial value out of the dynamic object and into the
4603 runtime process image. We need to remember the offset into the
4604 .rela.bss section we are going to use. */
4605 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4606 {
4607 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4608 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4609 }
4610
4611 /* We need to figure out the alignment required for this symbol. I
4612 have no idea how ELF linkers handle this. */
4613 power_of_two = bfd_log2 (h->size);
4614 if (power_of_two > 4)
4615 power_of_two = 4;
4616
4617 /* Apply the required alignment. */
4618 s = htab->dynbss;
4619 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4620 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4621 {
4622 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4623 return FALSE;
4624 }
4625
4626 /* Define the symbol as being at this point in the section. */
4627 h->root.u.def.section = s;
4628 h->root.u.def.value = s->_raw_size;
4629
4630 /* Increment the section size to make room for the symbol. */
4631 s->_raw_size += h->size;
4632
4633 return TRUE;
4634 }
4635
4636 /* If given a function descriptor symbol, hide both the function code
4637 sym and the descriptor. */
4638 static void
4639 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4640 struct elf_link_hash_entry *h,
4641 bfd_boolean force_local)
4642 {
4643 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4644
4645 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4646 {
4647 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4648
4649 if (fh == NULL)
4650 {
4651 const char *p, *q;
4652 struct ppc_link_hash_table *htab;
4653 char save;
4654
4655 /* We aren't supposed to use alloca in BFD because on
4656 systems which do not have alloca the version in libiberty
4657 calls xmalloc, which might cause the program to crash
4658 when it runs out of memory. This function doesn't have a
4659 return status, so there's no way to gracefully return an
4660 error. So cheat. We know that string[-1] can be safely
4661 dereferenced; It's either a string in an ELF string
4662 table, or allocated in an objalloc structure. */
4663
4664 p = h->root.root.string - 1;
4665 save = *p;
4666 *(char *) p = '.';
4667 htab = ppc_hash_table (info);
4668 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4669 *(char *) p = save;
4670
4671 /* Unfortunately, if it so happens that the string we were
4672 looking for was allocated immediately before this string,
4673 then we overwrote the string terminator. That's the only
4674 reason the lookup should fail. */
4675 if (fh == NULL)
4676 {
4677 q = h->root.root.string + strlen (h->root.root.string);
4678 while (q >= h->root.root.string && *q == *p)
4679 --q, --p;
4680 if (q < h->root.root.string && *p == '.')
4681 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4682 }
4683 if (fh != NULL)
4684 {
4685 ((struct ppc_link_hash_entry *) h)->oh = fh;
4686 ((struct ppc_link_hash_entry *) fh)->oh = h;
4687 }
4688 }
4689 if (fh != NULL)
4690 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4691 }
4692 }
4693
4694 static bfd_boolean
4695 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4696 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4697 unsigned long r_symndx, bfd *ibfd)
4698 {
4699 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4700
4701 if (r_symndx >= symtab_hdr->sh_info)
4702 {
4703 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4704 struct elf_link_hash_entry *h;
4705
4706 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4707 while (h->root.type == bfd_link_hash_indirect
4708 || h->root.type == bfd_link_hash_warning)
4709 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4710
4711 if (hp != NULL)
4712 *hp = h;
4713
4714 if (symp != NULL)
4715 *symp = NULL;
4716
4717 if (symsecp != NULL)
4718 {
4719 asection *symsec = NULL;
4720 if (h->root.type == bfd_link_hash_defined
4721 || h->root.type == bfd_link_hash_defweak)
4722 symsec = h->root.u.def.section;
4723 *symsecp = symsec;
4724 }
4725
4726 if (tls_maskp != NULL)
4727 {
4728 struct ppc_link_hash_entry *eh;
4729
4730 eh = (struct ppc_link_hash_entry *) h;
4731 *tls_maskp = &eh->tls_mask;
4732 }
4733 }
4734 else
4735 {
4736 Elf_Internal_Sym *sym;
4737 Elf_Internal_Sym *locsyms = *locsymsp;
4738
4739 if (locsyms == NULL)
4740 {
4741 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4742 if (locsyms == NULL)
4743 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4744 symtab_hdr->sh_info,
4745 0, NULL, NULL, NULL);
4746 if (locsyms == NULL)
4747 return FALSE;
4748 *locsymsp = locsyms;
4749 }
4750 sym = locsyms + r_symndx;
4751
4752 if (hp != NULL)
4753 *hp = NULL;
4754
4755 if (symp != NULL)
4756 *symp = sym;
4757
4758 if (symsecp != NULL)
4759 {
4760 asection *symsec = NULL;
4761 if ((sym->st_shndx != SHN_UNDEF
4762 && sym->st_shndx < SHN_LORESERVE)
4763 || sym->st_shndx > SHN_HIRESERVE)
4764 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4765 *symsecp = symsec;
4766 }
4767
4768 if (tls_maskp != NULL)
4769 {
4770 struct got_entry **lgot_ents;
4771 char *tls_mask;
4772
4773 tls_mask = NULL;
4774 lgot_ents = elf_local_got_ents (ibfd);
4775 if (lgot_ents != NULL)
4776 {
4777 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4778 tls_mask = &lgot_masks[r_symndx];
4779 }
4780 *tls_maskp = tls_mask;
4781 }
4782 }
4783 return TRUE;
4784 }
4785
4786 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4787 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4788 type suitable for optimization, and 1 otherwise. */
4789
4790 static int
4791 get_tls_mask (char **tls_maskp, Elf_Internal_Sym **locsymsp,
4792 const Elf_Internal_Rela *rel, bfd *ibfd)
4793 {
4794 unsigned long r_symndx;
4795 unsigned int next_r;
4796 struct elf_link_hash_entry *h;
4797 Elf_Internal_Sym *sym;
4798 asection *sec;
4799 bfd_vma off;
4800
4801 r_symndx = ELF64_R_SYM (rel->r_info);
4802 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4803 return 0;
4804
4805 if ((*tls_maskp != NULL && **tls_maskp != 0)
4806 || sec == NULL
4807 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4808 return 1;
4809
4810 /* Look inside a TOC section too. */
4811 if (h != NULL)
4812 {
4813 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4814 off = h->root.u.def.value;
4815 }
4816 else
4817 off = sym->st_value;
4818 off += rel->r_addend;
4819 BFD_ASSERT (off % 8 == 0);
4820 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4821 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4822 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4823 return 0;
4824 if (h == NULL
4825 || h->root.type == bfd_link_hash_defined
4826 || h->root.type == bfd_link_hash_defweak)
4827 {
4828 if (next_r == (unsigned) -1)
4829 return 2;
4830 if (next_r == (unsigned) -2
4831 && (h == NULL
4832 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4833 return 3;
4834 }
4835 return 1;
4836 }
4837
4838 bfd_boolean
4839 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4840 {
4841 bfd *ibfd;
4842
4843 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4844 {
4845 asection *sec;
4846 Elf_Internal_Rela *relstart, *rel, *relend;
4847 Elf_Internal_Shdr *symtab_hdr;
4848 Elf_Internal_Sym *local_syms;
4849 struct elf_link_hash_entry **sym_hashes;
4850 bfd_vma offset;
4851 bfd_size_type amt;
4852 long *adjust;
4853 bfd_boolean need_edit;
4854
4855 sec = bfd_get_section_by_name (ibfd, ".opd");
4856 if (sec == NULL)
4857 continue;
4858
4859 amt = sec->_raw_size * sizeof (long) / 24;
4860 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4861 if (adjust == NULL)
4862 {
4863 /* Must be a ld -r link. ie. check_relocs hasn't been
4864 called. */
4865 adjust = bfd_zalloc (obfd, amt);
4866 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4867 }
4868 memset (adjust, 0, amt);
4869
4870 if (sec->output_section == bfd_abs_section_ptr)
4871 continue;
4872
4873 /* Look through the section relocs. */
4874 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4875 continue;
4876
4877 local_syms = NULL;
4878 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4879 sym_hashes = elf_sym_hashes (ibfd);
4880
4881 /* Read the relocations. */
4882 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4883 info->keep_memory);
4884 if (relstart == NULL)
4885 return FALSE;
4886
4887 /* First run through the relocs to check they are sane, and to
4888 determine whether we need to edit this opd section. */
4889 need_edit = FALSE;
4890 offset = 0;
4891 relend = relstart + sec->reloc_count;
4892 for (rel = relstart; rel < relend; )
4893 {
4894 enum elf_ppc64_reloc_type r_type;
4895 unsigned long r_symndx;
4896 asection *sym_sec;
4897 struct elf_link_hash_entry *h;
4898 Elf_Internal_Sym *sym;
4899
4900 /* .opd contains a regular array of 24 byte entries. We're
4901 only interested in the reloc pointing to a function entry
4902 point. */
4903 if (rel->r_offset != offset
4904 || rel + 1 >= relend
4905 || (rel + 1)->r_offset != offset + 8)
4906 {
4907 /* If someone messes with .opd alignment then after a
4908 "ld -r" we might have padding in the middle of .opd.
4909 Also, there's nothing to prevent someone putting
4910 something silly in .opd with the assembler. No .opd
4911 optimization for them! */
4912 (*_bfd_error_handler)
4913 (_("%s: .opd is not a regular array of opd entries"),
4914 bfd_archive_filename (ibfd));
4915 need_edit = FALSE;
4916 break;
4917 }
4918
4919 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
4920 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
4921 {
4922 (*_bfd_error_handler)
4923 (_("%s: unexpected reloc type %u in .opd section"),
4924 bfd_archive_filename (ibfd), r_type);
4925 need_edit = FALSE;
4926 break;
4927 }
4928
4929 r_symndx = ELF64_R_SYM (rel->r_info);
4930 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
4931 r_symndx, ibfd))
4932 goto error_ret;
4933
4934 if (sym_sec == NULL || sym_sec->owner == NULL)
4935 {
4936 const char *sym_name;
4937 if (h != NULL)
4938 sym_name = h->root.root.string;
4939 else
4940 sym_name = bfd_elf_local_sym_name (ibfd, sym);
4941
4942 (*_bfd_error_handler)
4943 (_("%s: undefined sym `%s' in .opd section"),
4944 bfd_archive_filename (ibfd),
4945 sym_name);
4946 need_edit = FALSE;
4947 break;
4948 }
4949
4950 /* opd entries are always for functions defined in the
4951 current input bfd. If the symbol isn't defined in the
4952 input bfd, then we won't be using the function in this
4953 bfd; It must be defined in a linkonce section in another
4954 bfd, or is weak. It's also possible that we are
4955 discarding the function due to a linker script /DISCARD/,
4956 which we test for via the output_section. */
4957 if (sym_sec->owner != ibfd
4958 || sym_sec->output_section == bfd_abs_section_ptr)
4959 need_edit = TRUE;
4960
4961 offset += 24;
4962 rel += 2;
4963 /* Allow for the possibility of a reloc on the third word. */
4964 if (rel < relend
4965 && rel->r_offset == offset - 8)
4966 rel += 1;
4967 }
4968
4969 if (need_edit)
4970 {
4971 Elf_Internal_Rela *write_rel;
4972 bfd_byte *rptr, *wptr;
4973 bfd_boolean skip;
4974
4975 /* This seems a waste of time as input .opd sections are all
4976 zeros as generated by gcc, but I suppose there's no reason
4977 this will always be so. We might start putting something in
4978 the third word of .opd entries. */
4979 if ((sec->flags & SEC_IN_MEMORY) == 0)
4980 {
4981 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
4982 if (loc == NULL
4983 || !bfd_get_section_contents (ibfd, sec, loc, 0,
4984 sec->_raw_size))
4985 {
4986 error_ret:
4987 if (local_syms != NULL
4988 && symtab_hdr->contents != (unsigned char *) local_syms)
4989 free (local_syms);
4990 if (elf_section_data (sec)->relocs != relstart)
4991 free (relstart);
4992 return FALSE;
4993 }
4994 sec->contents = loc;
4995 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
4996 }
4997
4998 elf_section_data (sec)->relocs = relstart;
4999
5000 wptr = sec->contents;
5001 rptr = sec->contents;
5002 write_rel = relstart;
5003 skip = FALSE;
5004 offset = 0;
5005 for (rel = relstart; rel < relend; rel++)
5006 {
5007 unsigned long r_symndx;
5008 asection *sym_sec;
5009 struct elf_link_hash_entry *h;
5010 Elf_Internal_Sym *sym;
5011
5012 r_symndx = ELF64_R_SYM (rel->r_info);
5013 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5014 r_symndx, ibfd))
5015 goto error_ret;
5016
5017 if (rel->r_offset == offset)
5018 {
5019 struct ppc_link_hash_entry *fdh = NULL;
5020 if (h != NULL)
5021 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5022 ppc_hash_table (info));
5023
5024 skip = (sym_sec->owner != ibfd
5025 || sym_sec->output_section == bfd_abs_section_ptr);
5026 if (skip)
5027 {
5028 if (h != NULL && sym_sec->owner == ibfd)
5029 {
5030 /* Arrange for the function descriptor sym
5031 to be dropped. */
5032 fdh->elf.root.u.def.value = 0;
5033 fdh->elf.root.u.def.section = sym_sec;
5034 }
5035 }
5036 else
5037 {
5038 /* We'll be keeping this opd entry. */
5039
5040 if (h != NULL)
5041 {
5042 /* Redefine the function descriptor symbol
5043 to this location in the opd section.
5044 We've checked above that opd relocs are
5045 ordered. */
5046 fdh->elf.root.u.def.value = wptr - sec->contents;
5047 }
5048 else
5049 {
5050 /* Local syms are a bit tricky. We could
5051 tweak them as they can be cached, but
5052 we'd need to look through the local syms
5053 for the function descriptor sym which we
5054 don't have at the moment. So keep an
5055 array of adjustments. */
5056 adjust[rel->r_offset / 24] = wptr - rptr;
5057 }
5058
5059 if (wptr != rptr)
5060 memcpy (wptr, rptr, 24);
5061 wptr += 24;
5062 }
5063 rptr += 24;
5064 offset += 24;
5065 }
5066
5067 if (skip)
5068 {
5069 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5070 if (info->shared)
5071 {
5072 /* We won't be needing dynamic relocs here. */
5073 struct ppc_dyn_relocs **pp;
5074 struct ppc_dyn_relocs *p;
5075
5076 if (h != NULL)
5077 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5078 else if (sym_sec != NULL)
5079 pp = ((struct ppc_dyn_relocs **)
5080 &elf_section_data (sym_sec)->local_dynrel);
5081 else
5082 pp = ((struct ppc_dyn_relocs **)
5083 &elf_section_data (sec)->local_dynrel);
5084 while ((p = *pp) != NULL)
5085 {
5086 if (p->sec == sec)
5087 {
5088 p->count -= 1;
5089 if (p->count == 0)
5090 *pp = p->next;
5091 break;
5092 }
5093 pp = &p->next;
5094 }
5095 }
5096 }
5097 else
5098 {
5099 /* We need to adjust any reloc offsets to point to the
5100 new opd entries. While we're at it, we may as well
5101 remove redundant relocs. */
5102 rel->r_offset += wptr - rptr;
5103 if (write_rel != rel)
5104 memcpy (write_rel, rel, sizeof (*rel));
5105 ++write_rel;
5106 }
5107 }
5108
5109 sec->_cooked_size = wptr - sec->contents;
5110 sec->reloc_count = write_rel - relstart;
5111 /* Fudge the size too, as this is used later in
5112 elf_bfd_final_link if we are emitting relocs. */
5113 elf_section_data (sec)->rel_hdr.sh_size
5114 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5115 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5116 }
5117 else if (elf_section_data (sec)->relocs != relstart)
5118 free (relstart);
5119
5120 if (local_syms != NULL
5121 && symtab_hdr->contents != (unsigned char *) local_syms)
5122 {
5123 if (!info->keep_memory)
5124 free (local_syms);
5125 else
5126 symtab_hdr->contents = (unsigned char *) local_syms;
5127 }
5128 }
5129
5130 return TRUE;
5131 }
5132
5133 /* Set htab->tls_sec. */
5134
5135 bfd_boolean
5136 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5137 {
5138 asection *tls;
5139 struct ppc_link_hash_table *htab;
5140
5141 for (tls = obfd->sections; tls != NULL; tls = tls->next)
5142 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
5143 == (SEC_THREAD_LOCAL | SEC_LOAD))
5144 break;
5145
5146 htab = ppc_hash_table (info);
5147 htab->tls_sec = tls;
5148
5149 if (htab->tls_get_addr != NULL)
5150 {
5151 struct elf_link_hash_entry *h = htab->tls_get_addr;
5152
5153 while (h->root.type == bfd_link_hash_indirect
5154 || h->root.type == bfd_link_hash_warning)
5155 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5156
5157 htab->tls_get_addr = h;
5158 }
5159
5160 return tls != NULL;
5161 }
5162
5163 /* Run through all the TLS relocs looking for optimization
5164 opportunities. The linker has been hacked (see ppc64elf.em) to do
5165 a preliminary section layout so that we know the TLS segment
5166 offsets. We can't optimize earlier because some optimizations need
5167 to know the tp offset, and we need to optimize before allocating
5168 dynamic relocations. */
5169
5170 bfd_boolean
5171 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5172 {
5173 bfd *ibfd;
5174 asection *sec;
5175 struct ppc_link_hash_table *htab;
5176
5177 if (info->relocatable || info->shared)
5178 return TRUE;
5179
5180 htab = ppc_hash_table (info);
5181 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5182 {
5183 Elf_Internal_Sym *locsyms = NULL;
5184
5185 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5186 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5187 {
5188 Elf_Internal_Rela *relstart, *rel, *relend;
5189 int expecting_tls_get_addr;
5190
5191 /* Read the relocations. */
5192 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5193 info->keep_memory);
5194 if (relstart == NULL)
5195 return FALSE;
5196
5197 expecting_tls_get_addr = 0;
5198 relend = relstart + sec->reloc_count;
5199 for (rel = relstart; rel < relend; rel++)
5200 {
5201 enum elf_ppc64_reloc_type r_type;
5202 unsigned long r_symndx;
5203 struct elf_link_hash_entry *h;
5204 Elf_Internal_Sym *sym;
5205 asection *sym_sec;
5206 char *tls_mask;
5207 char tls_set, tls_clear, tls_type = 0;
5208 bfd_vma value;
5209 bfd_boolean ok_tprel, is_local;
5210
5211 r_symndx = ELF64_R_SYM (rel->r_info);
5212 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5213 r_symndx, ibfd))
5214 {
5215 err_free_rel:
5216 if (elf_section_data (sec)->relocs != relstart)
5217 free (relstart);
5218 if (locsyms != NULL
5219 && (elf_tdata (ibfd)->symtab_hdr.contents
5220 != (unsigned char *) locsyms))
5221 free (locsyms);
5222 return FALSE;
5223 }
5224
5225 if (h != NULL)
5226 {
5227 if (h->root.type != bfd_link_hash_defined
5228 && h->root.type != bfd_link_hash_defweak)
5229 continue;
5230 value = h->root.u.def.value;
5231 }
5232 else
5233 value = sym->st_value;
5234
5235 ok_tprel = FALSE;
5236 is_local = FALSE;
5237 if (h == NULL
5238 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5239 {
5240 is_local = TRUE;
5241 value += sym_sec->output_offset;
5242 value += sym_sec->output_section->vma;
5243 value -= htab->tls_sec->vma;
5244 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5245 < (bfd_vma) 1 << 32);
5246 }
5247
5248 r_type = ELF64_R_TYPE (rel->r_info);
5249 switch (r_type)
5250 {
5251 case R_PPC64_GOT_TLSLD16:
5252 case R_PPC64_GOT_TLSLD16_LO:
5253 case R_PPC64_GOT_TLSLD16_HI:
5254 case R_PPC64_GOT_TLSLD16_HA:
5255 /* These relocs should never be against a symbol
5256 defined in a shared lib. Leave them alone if
5257 that turns out to be the case. */
5258 ppc64_tlsld_got (ibfd)->refcount -= 1;
5259 if (!is_local)
5260 continue;
5261
5262 /* LD -> LE */
5263 tls_set = 0;
5264 tls_clear = TLS_LD;
5265 tls_type = TLS_TLS | TLS_LD;
5266 expecting_tls_get_addr = 1;
5267 break;
5268
5269 case R_PPC64_GOT_TLSGD16:
5270 case R_PPC64_GOT_TLSGD16_LO:
5271 case R_PPC64_GOT_TLSGD16_HI:
5272 case R_PPC64_GOT_TLSGD16_HA:
5273 if (ok_tprel)
5274 /* GD -> LE */
5275 tls_set = 0;
5276 else
5277 /* GD -> IE */
5278 tls_set = TLS_TLS | TLS_TPRELGD;
5279 tls_clear = TLS_GD;
5280 tls_type = TLS_TLS | TLS_GD;
5281 expecting_tls_get_addr = 1;
5282 break;
5283
5284 case R_PPC64_GOT_TPREL16_DS:
5285 case R_PPC64_GOT_TPREL16_LO_DS:
5286 case R_PPC64_GOT_TPREL16_HI:
5287 case R_PPC64_GOT_TPREL16_HA:
5288 expecting_tls_get_addr = 0;
5289 if (ok_tprel)
5290 {
5291 /* IE -> LE */
5292 tls_set = 0;
5293 tls_clear = TLS_TPREL;
5294 tls_type = TLS_TLS | TLS_TPREL;
5295 break;
5296 }
5297 else
5298 continue;
5299
5300 case R_PPC64_REL14:
5301 case R_PPC64_REL14_BRTAKEN:
5302 case R_PPC64_REL14_BRNTAKEN:
5303 case R_PPC64_REL24:
5304 if (h != NULL
5305 && h == htab->tls_get_addr)
5306 {
5307 if (!expecting_tls_get_addr
5308 && rel != relstart
5309 && ((ELF64_R_TYPE (rel[-1].r_info)
5310 == R_PPC64_TOC16)
5311 || (ELF64_R_TYPE (rel[-1].r_info)
5312 == R_PPC64_TOC16_LO)))
5313 {
5314 /* Check for toc tls entries. */
5315 char *toc_tls;
5316 int retval;
5317
5318 retval = get_tls_mask (&toc_tls, &locsyms,
5319 rel - 1, ibfd);
5320 if (retval == 0)
5321 goto err_free_rel;
5322 if (toc_tls != NULL)
5323 expecting_tls_get_addr = retval > 1;
5324 }
5325
5326 if (expecting_tls_get_addr)
5327 {
5328 struct plt_entry *ent;
5329 for (ent = h->plt.plist; ent; ent = ent->next)
5330 if (ent->addend == 0)
5331 {
5332 if (ent->plt.refcount > 0)
5333 ent->plt.refcount -= 1;
5334 break;
5335 }
5336 }
5337 }
5338 expecting_tls_get_addr = 0;
5339 continue;
5340
5341 case R_PPC64_TPREL64:
5342 expecting_tls_get_addr = 0;
5343 if (ok_tprel)
5344 {
5345 /* IE -> LE */
5346 tls_set = TLS_EXPLICIT;
5347 tls_clear = TLS_TPREL;
5348 break;
5349 }
5350 else
5351 continue;
5352
5353 case R_PPC64_DTPMOD64:
5354 expecting_tls_get_addr = 0;
5355 if (rel + 1 < relend
5356 && (rel[1].r_info
5357 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5358 && rel[1].r_offset == rel->r_offset + 8)
5359 {
5360 if (ok_tprel)
5361 /* GD -> LE */
5362 tls_set = TLS_EXPLICIT | TLS_GD;
5363 else
5364 /* GD -> IE */
5365 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5366 tls_clear = TLS_GD;
5367 }
5368 else
5369 {
5370 if (!is_local)
5371 continue;
5372
5373 /* LD -> LE */
5374 tls_set = TLS_EXPLICIT;
5375 tls_clear = TLS_LD;
5376 }
5377 break;
5378
5379 default:
5380 expecting_tls_get_addr = 0;
5381 continue;
5382 }
5383
5384 if ((tls_set & TLS_EXPLICIT) == 0)
5385 {
5386 struct got_entry *ent;
5387
5388 /* Adjust got entry for this reloc. */
5389 if (h != NULL)
5390 ent = h->got.glist;
5391 else
5392 ent = elf_local_got_ents (ibfd)[r_symndx];
5393
5394 for (; ent != NULL; ent = ent->next)
5395 if (ent->addend == rel->r_addend
5396 && ent->owner == ibfd
5397 && ent->tls_type == tls_type)
5398 break;
5399 if (ent == NULL)
5400 abort ();
5401
5402 if (tls_set == 0)
5403 {
5404 /* We managed to get rid of a got entry. */
5405 if (ent->got.refcount > 0)
5406 ent->got.refcount -= 1;
5407 }
5408 }
5409 else if (h != NULL)
5410 {
5411 struct ppc_link_hash_entry * eh;
5412 struct ppc_dyn_relocs **pp;
5413 struct ppc_dyn_relocs *p;
5414
5415 /* Adjust dynamic relocs. */
5416 eh = (struct ppc_link_hash_entry *) h;
5417 for (pp = &eh->dyn_relocs;
5418 (p = *pp) != NULL;
5419 pp = &p->next)
5420 if (p->sec == sec)
5421 {
5422 /* If we got rid of a DTPMOD/DTPREL reloc
5423 pair then we'll lose one or two dyn
5424 relocs. */
5425 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5426 p->count -= 1;
5427 p->count -= 1;
5428 if (p->count == 0)
5429 *pp = p->next;
5430 break;
5431 }
5432 }
5433
5434 *tls_mask |= tls_set;
5435 *tls_mask &= ~tls_clear;
5436 }
5437
5438 if (elf_section_data (sec)->relocs != relstart)
5439 free (relstart);
5440 }
5441
5442 if (locsyms != NULL
5443 && (elf_tdata (ibfd)->symtab_hdr.contents
5444 != (unsigned char *) locsyms))
5445 {
5446 if (!info->keep_memory)
5447 free (locsyms);
5448 else
5449 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5450 }
5451 }
5452 return TRUE;
5453 }
5454
5455 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5456 will be called from elflink.h. If elflink.h doesn't call our
5457 finish_dynamic_symbol routine, we'll need to do something about
5458 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5459 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5460 ((DYN) \
5461 && ((SHARED) \
5462 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5463 && ((H)->dynindx != -1 \
5464 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5465
5466 /* Allocate space in .plt, .got and associated reloc sections for
5467 dynamic relocs. */
5468
5469 static bfd_boolean
5470 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5471 {
5472 struct bfd_link_info *info;
5473 struct ppc_link_hash_table *htab;
5474 asection *s;
5475 struct ppc_link_hash_entry *eh;
5476 struct ppc_dyn_relocs *p;
5477 struct got_entry *gent;
5478
5479 if (h->root.type == bfd_link_hash_indirect)
5480 return TRUE;
5481
5482 if (h->root.type == bfd_link_hash_warning)
5483 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5484
5485 info = (struct bfd_link_info *) inf;
5486 htab = ppc_hash_table (info);
5487
5488 if (htab->elf.dynamic_sections_created
5489 && h->dynindx != -1
5490 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5491 {
5492 struct plt_entry *pent;
5493 bfd_boolean doneone = FALSE;
5494 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5495 if (pent->plt.refcount > 0)
5496 {
5497 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5498
5499 /* If this is the first .plt entry, make room for the special
5500 first entry. */
5501 s = htab->plt;
5502 if (s->_raw_size == 0)
5503 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5504
5505 pent->plt.offset = s->_raw_size;
5506
5507 /* Make room for this entry. */
5508 s->_raw_size += PLT_ENTRY_SIZE;
5509
5510 /* Make room for the .glink code. */
5511 s = htab->glink;
5512 if (s->_raw_size == 0)
5513 s->_raw_size += GLINK_CALL_STUB_SIZE;
5514 /* We need bigger stubs past index 32767. */
5515 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5516 s->_raw_size += 4;
5517 s->_raw_size += 2*4;
5518
5519 /* We also need to make an entry in the .rela.plt section. */
5520 s = htab->relplt;
5521 s->_raw_size += sizeof (Elf64_External_Rela);
5522 doneone = TRUE;
5523 }
5524 else
5525 pent->plt.offset = (bfd_vma) -1;
5526 if (!doneone)
5527 {
5528 h->plt.plist = NULL;
5529 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5530 }
5531 }
5532 else
5533 {
5534 h->plt.plist = NULL;
5535 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5536 }
5537
5538 eh = (struct ppc_link_hash_entry *) h;
5539 /* Run through the TLS GD got entries first if we're changing them
5540 to TPREL. */
5541 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5542 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5543 if (gent->got.refcount > 0
5544 && (gent->tls_type & TLS_GD) != 0)
5545 {
5546 /* This was a GD entry that has been converted to TPREL. If
5547 there happens to be a TPREL entry we can use that one. */
5548 struct got_entry *ent;
5549 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5550 if (ent->got.refcount > 0
5551 && (ent->tls_type & TLS_TPREL) != 0
5552 && ent->addend == gent->addend
5553 && ent->owner == gent->owner)
5554 {
5555 gent->got.refcount = 0;
5556 break;
5557 }
5558
5559 /* If not, then we'll be using our own TPREL entry. */
5560 if (gent->got.refcount != 0)
5561 gent->tls_type = TLS_TLS | TLS_TPREL;
5562 }
5563
5564 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5565 if (gent->got.refcount > 0)
5566 {
5567 bfd_boolean dyn;
5568
5569 /* Make sure this symbol is output as a dynamic symbol.
5570 Undefined weak syms won't yet be marked as dynamic,
5571 nor will all TLS symbols. */
5572 if (h->dynindx == -1
5573 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5574 {
5575 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5576 return FALSE;
5577 }
5578
5579 if ((gent->tls_type & TLS_LD) != 0
5580 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5581 {
5582 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5583 continue;
5584 }
5585
5586 s = ppc64_elf_tdata (gent->owner)->got;
5587 gent->got.offset = s->_raw_size;
5588 s->_raw_size
5589 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5590 dyn = htab->elf.dynamic_sections_created;
5591 if ((info->shared
5592 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5593 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5594 || h->root.type != bfd_link_hash_undefweak))
5595 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5596 += (gent->tls_type & eh->tls_mask & TLS_GD
5597 ? 2 * sizeof (Elf64_External_Rela)
5598 : sizeof (Elf64_External_Rela));
5599 }
5600 else
5601 gent->got.offset = (bfd_vma) -1;
5602
5603 if (eh->dyn_relocs == NULL)
5604 return TRUE;
5605
5606 /* In the shared -Bsymbolic case, discard space allocated for
5607 dynamic pc-relative relocs against symbols which turn out to be
5608 defined in regular objects. For the normal shared case, discard
5609 space for relocs that have become local due to symbol visibility
5610 changes. */
5611
5612 if (info->shared)
5613 {
5614 /* Relocs that use pc_count are those that appear on a call insn,
5615 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5616 generated via assembly. We want calls to protected symbols to
5617 resolve directly to the function rather than going via the plt.
5618 If people want function pointer comparisons to work as expected
5619 then they should avoid writing weird assembly. */
5620 if (SYMBOL_CALLS_LOCAL (info, h))
5621 {
5622 struct ppc_dyn_relocs **pp;
5623
5624 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5625 {
5626 p->count -= p->pc_count;
5627 p->pc_count = 0;
5628 if (p->count == 0)
5629 *pp = p->next;
5630 else
5631 pp = &p->next;
5632 }
5633 }
5634
5635 /* Also discard relocs on undefined weak syms with non-default
5636 visibility. */
5637 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5638 && h->root.type == bfd_link_hash_undefweak)
5639 eh->dyn_relocs = NULL;
5640 }
5641 else if (ELIMINATE_COPY_RELOCS)
5642 {
5643 /* For the non-shared case, discard space for relocs against
5644 symbols which turn out to need copy relocs or are not
5645 dynamic. */
5646
5647 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5648 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5649 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5650 {
5651 /* Make sure this symbol is output as a dynamic symbol.
5652 Undefined weak syms won't yet be marked as dynamic. */
5653 if (h->dynindx == -1
5654 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5655 {
5656 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5657 return FALSE;
5658 }
5659
5660 /* If that succeeded, we know we'll be keeping all the
5661 relocs. */
5662 if (h->dynindx != -1)
5663 goto keep;
5664 }
5665
5666 eh->dyn_relocs = NULL;
5667
5668 keep: ;
5669 }
5670
5671 /* Finally, allocate space. */
5672 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5673 {
5674 asection *sreloc = elf_section_data (p->sec)->sreloc;
5675 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5676 }
5677
5678 return TRUE;
5679 }
5680
5681 /* Find any dynamic relocs that apply to read-only sections. */
5682
5683 static bfd_boolean
5684 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5685 {
5686 struct ppc_link_hash_entry *eh;
5687 struct ppc_dyn_relocs *p;
5688
5689 if (h->root.type == bfd_link_hash_warning)
5690 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5691
5692 eh = (struct ppc_link_hash_entry *) h;
5693 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5694 {
5695 asection *s = p->sec->output_section;
5696
5697 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5698 {
5699 struct bfd_link_info *info = inf;
5700
5701 info->flags |= DF_TEXTREL;
5702
5703 /* Not an error, just cut short the traversal. */
5704 return FALSE;
5705 }
5706 }
5707 return TRUE;
5708 }
5709
5710 /* Set the sizes of the dynamic sections. */
5711
5712 static bfd_boolean
5713 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5714 struct bfd_link_info *info)
5715 {
5716 struct ppc_link_hash_table *htab;
5717 bfd *dynobj;
5718 asection *s;
5719 bfd_boolean relocs;
5720 bfd *ibfd;
5721
5722 htab = ppc_hash_table (info);
5723 dynobj = htab->elf.dynobj;
5724 if (dynobj == NULL)
5725 abort ();
5726
5727 if (htab->elf.dynamic_sections_created)
5728 {
5729 /* Set the contents of the .interp section to the interpreter. */
5730 if (info->executable)
5731 {
5732 s = bfd_get_section_by_name (dynobj, ".interp");
5733 if (s == NULL)
5734 abort ();
5735 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5736 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5737 }
5738 }
5739
5740 /* Set up .got offsets for local syms, and space for local dynamic
5741 relocs. */
5742 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5743 {
5744 struct got_entry **lgot_ents;
5745 struct got_entry **end_lgot_ents;
5746 char *lgot_masks;
5747 bfd_size_type locsymcount;
5748 Elf_Internal_Shdr *symtab_hdr;
5749 asection *srel;
5750
5751 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5752 continue;
5753
5754 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5755 {
5756 s = ppc64_elf_tdata (ibfd)->got;
5757 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5758 s->_raw_size += 16;
5759 if (info->shared)
5760 {
5761 srel = ppc64_elf_tdata (ibfd)->relgot;
5762 srel->_raw_size += sizeof (Elf64_External_Rela);
5763 }
5764 }
5765 else
5766 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5767
5768 for (s = ibfd->sections; s != NULL; s = s->next)
5769 {
5770 struct ppc_dyn_relocs *p;
5771
5772 for (p = *((struct ppc_dyn_relocs **)
5773 &elf_section_data (s)->local_dynrel);
5774 p != NULL;
5775 p = p->next)
5776 {
5777 if (!bfd_is_abs_section (p->sec)
5778 && bfd_is_abs_section (p->sec->output_section))
5779 {
5780 /* Input section has been discarded, either because
5781 it is a copy of a linkonce section or due to
5782 linker script /DISCARD/, so we'll be discarding
5783 the relocs too. */
5784 }
5785 else if (p->count != 0)
5786 {
5787 srel = elf_section_data (p->sec)->sreloc;
5788 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5789 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5790 info->flags |= DF_TEXTREL;
5791 }
5792 }
5793 }
5794
5795 lgot_ents = elf_local_got_ents (ibfd);
5796 if (!lgot_ents)
5797 continue;
5798
5799 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5800 locsymcount = symtab_hdr->sh_info;
5801 end_lgot_ents = lgot_ents + locsymcount;
5802 lgot_masks = (char *) end_lgot_ents;
5803 s = ppc64_elf_tdata (ibfd)->got;
5804 srel = ppc64_elf_tdata (ibfd)->relgot;
5805 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5806 {
5807 struct got_entry *ent;
5808
5809 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5810 if (ent->got.refcount > 0)
5811 {
5812 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5813 {
5814 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5815 {
5816 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5817 s->_raw_size += 16;
5818 if (info->shared)
5819 srel->_raw_size += sizeof (Elf64_External_Rela);
5820 }
5821 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5822 }
5823 else
5824 {
5825 ent->got.offset = s->_raw_size;
5826 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5827 {
5828 s->_raw_size += 16;
5829 if (info->shared)
5830 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5831 }
5832 else
5833 {
5834 s->_raw_size += 8;
5835 if (info->shared)
5836 srel->_raw_size += sizeof (Elf64_External_Rela);
5837 }
5838 }
5839 }
5840 else
5841 ent->got.offset = (bfd_vma) -1;
5842 }
5843 }
5844
5845 /* Allocate global sym .plt and .got entries, and space for global
5846 sym dynamic relocs. */
5847 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5848
5849 /* We now have determined the sizes of the various dynamic sections.
5850 Allocate memory for them. */
5851 relocs = FALSE;
5852 for (s = dynobj->sections; s != NULL; s = s->next)
5853 {
5854 if ((s->flags & SEC_LINKER_CREATED) == 0)
5855 continue;
5856
5857 /* Reset _cooked_size since prelim layout will set it wrongly,
5858 and a non-zero _cooked_size sticks. */
5859 s->_cooked_size = 0;
5860
5861 if (s == htab->brlt || s == htab->relbrlt)
5862 /* These haven't been allocated yet; don't strip. */
5863 continue;
5864 else if (s == htab->got
5865 || s == htab->plt
5866 || s == htab->glink)
5867 {
5868 /* Strip this section if we don't need it; see the
5869 comment below. */
5870 }
5871 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5872 {
5873 if (s->_raw_size == 0)
5874 {
5875 /* If we don't need this section, strip it from the
5876 output file. This is mostly to handle .rela.bss and
5877 .rela.plt. We must create both sections in
5878 create_dynamic_sections, because they must be created
5879 before the linker maps input sections to output
5880 sections. The linker does that before
5881 adjust_dynamic_symbol is called, and it is that
5882 function which decides whether anything needs to go
5883 into these sections. */
5884 }
5885 else
5886 {
5887 if (s != htab->relplt)
5888 relocs = TRUE;
5889
5890 /* We use the reloc_count field as a counter if we need
5891 to copy relocs into the output file. */
5892 s->reloc_count = 0;
5893 }
5894 }
5895 else
5896 {
5897 /* It's not one of our sections, so don't allocate space. */
5898 continue;
5899 }
5900
5901 if (s->_raw_size == 0)
5902 {
5903 _bfd_strip_section_from_output (info, s);
5904 continue;
5905 }
5906
5907 /* .plt is in the bss section. We don't initialise it. */
5908 if ((s->flags & SEC_LOAD) == 0)
5909 continue;
5910
5911 /* Allocate memory for the section contents. We use bfd_zalloc
5912 here in case unused entries are not reclaimed before the
5913 section's contents are written out. This should not happen,
5914 but this way if it does we get a R_PPC64_NONE reloc in .rela
5915 sections instead of garbage.
5916 We also rely on the section contents being zero when writing
5917 the GOT. */
5918 s->contents = bfd_zalloc (dynobj, s->_raw_size);
5919 if (s->contents == NULL)
5920 return FALSE;
5921 }
5922
5923 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5924 {
5925 s = ppc64_elf_tdata (ibfd)->got;
5926 if (s != NULL && s != htab->got)
5927 {
5928 s->_cooked_size = 0;
5929 if (s->_raw_size == 0)
5930 _bfd_strip_section_from_output (info, s);
5931 else
5932 {
5933 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5934 if (s->contents == NULL)
5935 return FALSE;
5936 }
5937 }
5938 s = ppc64_elf_tdata (ibfd)->relgot;
5939 if (s != NULL)
5940 {
5941 s->_cooked_size = 0;
5942 if (s->_raw_size == 0)
5943 _bfd_strip_section_from_output (info, s);
5944 else
5945 {
5946 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5947 if (s->contents == NULL)
5948 return FALSE;
5949 relocs = TRUE;
5950 s->reloc_count = 0;
5951 }
5952 }
5953 }
5954
5955 if (htab->elf.dynamic_sections_created)
5956 {
5957 /* Add some entries to the .dynamic section. We fill in the
5958 values later, in ppc64_elf_finish_dynamic_sections, but we
5959 must add the entries now so that we get the correct size for
5960 the .dynamic section. The DT_DEBUG entry is filled in by the
5961 dynamic linker and used by the debugger. */
5962 #define add_dynamic_entry(TAG, VAL) \
5963 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
5964
5965 if (info->executable)
5966 {
5967 if (!add_dynamic_entry (DT_DEBUG, 0))
5968 return FALSE;
5969 }
5970
5971 if (htab->plt != NULL && htab->plt->_raw_size != 0)
5972 {
5973 if (!add_dynamic_entry (DT_PLTGOT, 0)
5974 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5975 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5976 || !add_dynamic_entry (DT_JMPREL, 0)
5977 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
5978 return FALSE;
5979 }
5980
5981 if (NO_OPD_RELOCS)
5982 {
5983 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
5984 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
5985 return FALSE;
5986 }
5987
5988 if (relocs)
5989 {
5990 if (!add_dynamic_entry (DT_RELA, 0)
5991 || !add_dynamic_entry (DT_RELASZ, 0)
5992 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
5993 return FALSE;
5994
5995 /* If any dynamic relocs apply to a read-only section,
5996 then we need a DT_TEXTREL entry. */
5997 if ((info->flags & DF_TEXTREL) == 0)
5998 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
5999
6000 if ((info->flags & DF_TEXTREL) != 0)
6001 {
6002 if (!add_dynamic_entry (DT_TEXTREL, 0))
6003 return FALSE;
6004 }
6005 }
6006 }
6007 #undef add_dynamic_entry
6008
6009 return TRUE;
6010 }
6011
6012 /* Determine the type of stub needed, if any, for a call. */
6013
6014 static inline enum ppc_stub_type
6015 ppc_type_of_stub (asection *input_sec,
6016 const Elf_Internal_Rela *rel,
6017 struct ppc_link_hash_entry **hash,
6018 bfd_vma destination)
6019 {
6020 struct ppc_link_hash_entry *h = *hash;
6021 bfd_vma location;
6022 bfd_vma branch_offset;
6023 bfd_vma max_branch_offset;
6024 enum elf_ppc64_reloc_type r_type;
6025
6026 if (h != NULL)
6027 {
6028 if (h->oh != NULL
6029 && h->oh->dynindx != -1)
6030 {
6031 struct plt_entry *ent;
6032 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6033 if (ent->addend == rel->r_addend
6034 && ent->plt.offset != (bfd_vma) -1)
6035 {
6036 *hash = (struct ppc_link_hash_entry *) h->oh;
6037 return ppc_stub_plt_call;
6038 }
6039 }
6040
6041 if (h->elf.root.type != bfd_link_hash_defined
6042 && h->elf.root.type != bfd_link_hash_defweak)
6043 return ppc_stub_none;
6044 }
6045
6046 /* Determine where the call point is. */
6047 location = (input_sec->output_offset
6048 + input_sec->output_section->vma
6049 + rel->r_offset);
6050
6051 branch_offset = destination - location;
6052 r_type = ELF64_R_TYPE (rel->r_info);
6053
6054 /* Determine if a long branch stub is needed. */
6055 max_branch_offset = 1 << 25;
6056 if (r_type != R_PPC64_REL24)
6057 max_branch_offset = 1 << 15;
6058
6059 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6060 /* We need a stub. Figure out whether a long_branch or plt_branch
6061 is needed later. */
6062 return ppc_stub_long_branch;
6063
6064 return ppc_stub_none;
6065 }
6066
6067 /* Build a .plt call stub. */
6068
6069 static inline bfd_byte *
6070 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6071 {
6072 #define PPC_LO(v) ((v) & 0xffff)
6073 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6074 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6075
6076 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6077 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6078 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6079 if (PPC_HA (offset + 8) != PPC_HA (offset))
6080 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6081 offset += 8;
6082 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6083 if (PPC_HA (offset + 8) != PPC_HA (offset))
6084 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6085 offset += 8;
6086 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6087 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6088 bfd_put_32 (obfd, BCTR, p), p += 4;
6089 return p;
6090 }
6091
6092 static bfd_boolean
6093 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6094 {
6095 struct ppc_stub_hash_entry *stub_entry;
6096 struct ppc_branch_hash_entry *br_entry;
6097 struct bfd_link_info *info;
6098 struct ppc_link_hash_table *htab;
6099 asection *stub_sec;
6100 bfd *stub_bfd;
6101 bfd_byte *loc;
6102 bfd_byte *p;
6103 unsigned int indx;
6104 struct plt_entry *ent;
6105 bfd_vma off;
6106 int size;
6107
6108 /* Massage our args to the form they really have. */
6109 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6110 info = in_arg;
6111
6112 htab = ppc_hash_table (info);
6113 stub_sec = stub_entry->stub_sec;
6114
6115 /* Make a note of the offset within the stubs for this entry. */
6116 stub_entry->stub_offset = stub_sec->_cooked_size;
6117 loc = stub_sec->contents + stub_entry->stub_offset;
6118
6119 if (htab->emit_stub_syms)
6120 {
6121 struct elf_link_hash_entry *h;
6122 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6123 TRUE, FALSE, FALSE);
6124 if (h == NULL)
6125 return FALSE;
6126 h->root.type = bfd_link_hash_defined;
6127 h->root.u.def.section = stub_entry->stub_sec;
6128 h->root.u.def.value = stub_entry->stub_offset;
6129 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6130 | ELF_LINK_HASH_DEF_REGULAR
6131 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6132 | ELF_LINK_FORCED_LOCAL);
6133 }
6134
6135 stub_bfd = stub_sec->owner;
6136
6137 htab->stub_count[stub_entry->stub_type - 1] += 1;
6138 switch (stub_entry->stub_type)
6139 {
6140 case ppc_stub_long_branch:
6141 case ppc_stub_long_branch_r2off:
6142 /* Branches are relative. This is where we are going to. */
6143 off = (stub_entry->target_value
6144 + stub_entry->target_section->output_offset
6145 + stub_entry->target_section->output_section->vma);
6146
6147 /* And this is where we are coming from. */
6148 off -= (stub_entry->stub_offset
6149 + stub_sec->output_offset
6150 + stub_sec->output_section->vma);
6151
6152 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6153 size = 4;
6154 else
6155 {
6156 bfd_vma r2off;
6157
6158 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6159 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6160 bfd_put_32 (stub_bfd, STD_R2_40R1, loc);
6161 loc += 4;
6162 bfd_put_32 (stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6163 loc += 4;
6164 bfd_put_32 (stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6165 loc += 4;
6166 off -= 12;
6167 size = 16;
6168 }
6169 bfd_put_32 (stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6170
6171 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6172 break;
6173
6174 case ppc_stub_plt_branch:
6175 case ppc_stub_plt_branch_r2off:
6176 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6177 stub_entry->root.string + 9,
6178 FALSE, FALSE);
6179 if (br_entry == NULL)
6180 {
6181 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6182 stub_entry->root.string + 9);
6183 htab->stub_error = TRUE;
6184 return FALSE;
6185 }
6186
6187 off = (stub_entry->target_value
6188 + stub_entry->target_section->output_offset
6189 + stub_entry->target_section->output_section->vma);
6190
6191 bfd_put_64 (htab->brlt->owner, off,
6192 htab->brlt->contents + br_entry->offset);
6193
6194 if (info->shared)
6195 {
6196 /* Create a reloc for the branch lookup table entry. */
6197 Elf_Internal_Rela rela;
6198 bfd_byte *rl;
6199
6200 rela.r_offset = (br_entry->offset
6201 + htab->brlt->output_offset
6202 + htab->brlt->output_section->vma);
6203 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6204 rela.r_addend = off;
6205
6206 rl = htab->relbrlt->contents;
6207 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6208 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6209 }
6210
6211 off = (br_entry->offset
6212 + htab->brlt->output_offset
6213 + htab->brlt->output_section->vma
6214 - elf_gp (htab->brlt->output_section->owner)
6215 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6216
6217 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6218 {
6219 (*_bfd_error_handler)
6220 (_("linkage table error against `%s'"),
6221 stub_entry->root.string);
6222 bfd_set_error (bfd_error_bad_value);
6223 htab->stub_error = TRUE;
6224 return FALSE;
6225 }
6226
6227 indx = off;
6228 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6229 {
6230 bfd_put_32 (stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6231 loc += 4;
6232 bfd_put_32 (stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6233 size = 16;
6234 }
6235 else
6236 {
6237 bfd_vma r2off;
6238
6239 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6240 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6241 bfd_put_32 (stub_bfd, STD_R2_40R1, loc);
6242 loc += 4;
6243 bfd_put_32 (stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6244 loc += 4;
6245 bfd_put_32 (stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6246 loc += 4;
6247 bfd_put_32 (stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6248 loc += 4;
6249 bfd_put_32 (stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6250 size = 28;
6251 }
6252 loc += 4;
6253 bfd_put_32 (stub_bfd, MTCTR_R11, loc);
6254 loc += 4;
6255 bfd_put_32 (stub_bfd, BCTR, loc);
6256 break;
6257
6258 case ppc_stub_plt_call:
6259 /* Do the best we can for shared libraries built without
6260 exporting ".foo" for each "foo". This can happen when symbol
6261 versioning scripts strip all bar a subset of symbols. */
6262 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6263 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6264 {
6265 /* Point the symbol at the stub. There may be multiple stubs,
6266 we don't really care; The main thing is to make this sym
6267 defined somewhere. Maybe defining the symbol in the stub
6268 section is a silly idea. If we didn't do this, htab->top_id
6269 could disappear. */
6270 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6271 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6272 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6273 }
6274
6275 /* Now build the stub. */
6276 off = (bfd_vma) -1;
6277 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6278 if (ent->addend == stub_entry->addend)
6279 {
6280 off = ent->plt.offset;
6281 break;
6282 }
6283 if (off >= (bfd_vma) -2)
6284 abort ();
6285
6286 off &= ~ (bfd_vma) 1;
6287 off += (htab->plt->output_offset
6288 + htab->plt->output_section->vma
6289 - elf_gp (htab->plt->output_section->owner)
6290 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6291
6292 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6293 {
6294 (*_bfd_error_handler)
6295 (_("linkage table error against `%s'"),
6296 stub_entry->h->elf.root.root.string);
6297 bfd_set_error (bfd_error_bad_value);
6298 htab->stub_error = TRUE;
6299 return FALSE;
6300 }
6301
6302 p = build_plt_stub (stub_bfd, loc, off);
6303 size = p - loc;
6304 break;
6305
6306 default:
6307 BFD_FAIL ();
6308 return FALSE;
6309 }
6310
6311 stub_sec->_cooked_size += size;
6312 return TRUE;
6313 }
6314
6315 /* As above, but don't actually build the stub. Just bump offset so
6316 we know stub section sizes, and select plt_branch stubs where
6317 long_branch stubs won't do. */
6318
6319 static bfd_boolean
6320 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6321 {
6322 struct ppc_stub_hash_entry *stub_entry;
6323 struct ppc_link_hash_table *htab;
6324 bfd_vma off;
6325 int size;
6326
6327 /* Massage our args to the form they really have. */
6328 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6329 htab = in_arg;
6330
6331 if (stub_entry->stub_type == ppc_stub_plt_call)
6332 {
6333 struct plt_entry *ent;
6334 off = (bfd_vma) -1;
6335 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6336 if (ent->addend == stub_entry->addend)
6337 {
6338 off = ent->plt.offset & ~(bfd_vma) 1;
6339 break;
6340 }
6341 if (off >= (bfd_vma) -2)
6342 abort ();
6343 off += (htab->plt->output_offset
6344 + htab->plt->output_section->vma
6345 - elf_gp (htab->plt->output_section->owner)
6346 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6347
6348 size = PLT_CALL_STUB_SIZE;
6349 if (PPC_HA (off + 16) != PPC_HA (off))
6350 size += 4;
6351 }
6352 else
6353 {
6354 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6355 variants. */
6356 off = (stub_entry->target_value
6357 + stub_entry->target_section->output_offset
6358 + stub_entry->target_section->output_section->vma);
6359 off -= (stub_entry->stub_sec->_raw_size
6360 + stub_entry->stub_sec->output_offset
6361 + stub_entry->stub_sec->output_section->vma);
6362
6363 /* Reset the stub type from the plt variant in case we now
6364 can reach with a shorter stub. */
6365 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6366 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6367
6368 size = 4;
6369 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6370 {
6371 off -= 12;
6372 size = 16;
6373 }
6374
6375 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6376 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6377 {
6378 struct ppc_branch_hash_entry *br_entry;
6379
6380 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6381 stub_entry->root.string + 9,
6382 TRUE, FALSE);
6383 if (br_entry == NULL)
6384 {
6385 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6386 stub_entry->root.string + 9);
6387 htab->stub_error = TRUE;
6388 return FALSE;
6389 }
6390
6391 if (br_entry->iter != htab->stub_iteration)
6392 {
6393 br_entry->iter = htab->stub_iteration;
6394 br_entry->offset = htab->brlt->_raw_size;
6395 htab->brlt->_raw_size += 8;
6396 }
6397
6398 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6399 size = 16;
6400 if (stub_entry->stub_type != ppc_stub_plt_branch)
6401 size = 28;
6402 }
6403 }
6404
6405 stub_entry->stub_sec->_raw_size += size;
6406 return TRUE;
6407 }
6408
6409 /* Set up various things so that we can make a list of input sections
6410 for each output section included in the link. Returns -1 on error,
6411 0 when no stubs will be needed, and 1 on success. */
6412
6413 int
6414 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6415 {
6416 bfd *input_bfd;
6417 int top_id, top_index, id;
6418 asection *section;
6419 asection **input_list;
6420 bfd_size_type amt;
6421 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6422
6423 if (htab->brlt == NULL)
6424 return 0;
6425
6426 /* Find the top input section id. */
6427 for (input_bfd = info->input_bfds, top_id = 3;
6428 input_bfd != NULL;
6429 input_bfd = input_bfd->link_next)
6430 {
6431 for (section = input_bfd->sections;
6432 section != NULL;
6433 section = section->next)
6434 {
6435 if (top_id < section->id)
6436 top_id = section->id;
6437 }
6438 }
6439
6440 htab->top_id = top_id;
6441 amt = sizeof (struct map_stub) * (top_id + 1);
6442 htab->stub_group = bfd_zmalloc (amt);
6443 if (htab->stub_group == NULL)
6444 return -1;
6445
6446 /* Set toc_off for com, und, abs and ind sections. */
6447 for (id = 0; id < 3; id++)
6448 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6449
6450 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6451
6452 /* We can't use output_bfd->section_count here to find the top output
6453 section index as some sections may have been removed, and
6454 _bfd_strip_section_from_output doesn't renumber the indices. */
6455 for (section = output_bfd->sections, top_index = 0;
6456 section != NULL;
6457 section = section->next)
6458 {
6459 if (top_index < section->index)
6460 top_index = section->index;
6461 }
6462
6463 htab->top_index = top_index;
6464 amt = sizeof (asection *) * (top_index + 1);
6465 input_list = bfd_zmalloc (amt);
6466 htab->input_list = input_list;
6467 if (input_list == NULL)
6468 return -1;
6469
6470 return 1;
6471 }
6472
6473 /* The linker repeatedly calls this function for each TOC input section
6474 and linker generated GOT section. Group input bfds such that the toc
6475 within a group is less than 64k in size. Will break with cute linker
6476 scripts that play games with dot in the output toc section. */
6477
6478 void
6479 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6480 {
6481 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6482
6483 if (!htab->no_multi_toc)
6484 {
6485 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6486 bfd_vma off = addr - htab->toc_curr;
6487 if (off + isec->_raw_size > 0x10000)
6488 {
6489 htab->toc_curr = addr;
6490 htab->multi_toc_needed = 1;
6491 }
6492 elf_gp (isec->owner) = (htab->toc_curr
6493 - elf_gp (isec->output_section->owner)
6494 + TOC_BASE_OFF);
6495 }
6496 }
6497
6498 /* Called after the last call to the above function. */
6499
6500 void
6501 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6502 struct bfd_link_info *info)
6503 {
6504 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6505
6506 /* toc_curr tracks the TOC offset used for code sections below in
6507 ppc64_elf_next_input_section. Start off at 0x8000. */
6508 htab->toc_curr = TOC_BASE_OFF;
6509 }
6510
6511 /* No toc references were found in ISEC. If the code in ISEC makes no
6512 calls, then there's no need to use toc adjusting stubs when branching
6513 into ISEC. Actually, indirect calls from ISEC are OK as they will
6514 load r2. */
6515
6516 static int
6517 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6518 {
6519 bfd_byte *contents;
6520 bfd_size_type i;
6521 int ret;
6522 int branch_ok;
6523
6524 /* We know none of our code bearing sections will need toc stubs. */
6525 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6526 return 0;
6527
6528 /* Hack for linux kernel. .fixup contains branches, but only back to
6529 the function that hit an exception. */
6530 branch_ok = strcmp (isec->name, ".fixup") == 0;
6531
6532 contents = elf_section_data (isec)->this_hdr.contents;
6533 if (contents == NULL)
6534 {
6535 contents = bfd_malloc (isec->_raw_size);
6536 if (contents == NULL)
6537 return -1;
6538 if (! bfd_get_section_contents (isec->owner, isec, contents,
6539 0, isec->_raw_size))
6540 {
6541 free (contents);
6542 return -1;
6543 }
6544 if (info->keep_memory)
6545 elf_section_data (isec)->this_hdr.contents = contents;
6546 }
6547
6548 /* Code scan, because we don't necessarily have relocs on calls to
6549 static functions. */
6550 ret = 0;
6551 for (i = 0; i < isec->_raw_size; i += 4)
6552 {
6553 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6554 /* Is this a branch? */
6555 if ((insn & (0x3f << 26)) == (18 << 26)
6556 /* If branch and link, it's a function call. */
6557 && ((insn & 1) != 0
6558 /* Sibling calls use a plain branch. I don't know a way
6559 of deciding whether a branch is really a sibling call. */
6560 || !branch_ok))
6561 {
6562 ret = 1;
6563 break;
6564 }
6565 }
6566
6567 if (elf_section_data (isec)->this_hdr.contents != contents)
6568 free (contents);
6569 return ret;
6570 }
6571
6572 /* The linker repeatedly calls this function for each input section,
6573 in the order that input sections are linked into output sections.
6574 Build lists of input sections to determine groupings between which
6575 we may insert linker stubs. */
6576
6577 bfd_boolean
6578 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6579 {
6580 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6581 int ret;
6582
6583 if ((isec->output_section->flags & SEC_CODE) != 0
6584 && isec->output_section->index <= htab->top_index)
6585 {
6586 asection **list = htab->input_list + isec->output_section->index;
6587 /* Steal the link_sec pointer for our list. */
6588 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6589 /* This happens to make the list in reverse order,
6590 which is what we want. */
6591 PREV_SEC (isec) = *list;
6592 *list = isec;
6593 }
6594
6595 /* If a code section has a function that uses the TOC then we need
6596 to use the right TOC (obviously). Also, make sure that .opd gets
6597 the correct TOC value. */
6598 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6599 {
6600 if (elf_gp (isec->owner) != 0)
6601 htab->toc_curr = elf_gp (isec->owner);
6602 }
6603 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6604 return FALSE;
6605 else
6606 isec->has_gp_reloc = ret;
6607
6608 /* Functions that don't use the TOC can belong in any TOC group.
6609 Use the last TOC base. This happens to make _init and _fini
6610 pasting work. */
6611 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6612 return TRUE;
6613 }
6614
6615 /* See whether we can group stub sections together. Grouping stub
6616 sections may result in fewer stubs. More importantly, we need to
6617 put all .init* and .fini* stubs at the beginning of the .init or
6618 .fini output sections respectively, because glibc splits the
6619 _init and _fini functions into multiple parts. Putting a stub in
6620 the middle of a function is not a good idea. */
6621
6622 static void
6623 group_sections (struct ppc_link_hash_table *htab,
6624 bfd_size_type stub_group_size,
6625 bfd_boolean stubs_always_before_branch)
6626 {
6627 asection **list = htab->input_list + htab->top_index;
6628 do
6629 {
6630 asection *tail = *list;
6631 while (tail != NULL)
6632 {
6633 asection *curr;
6634 asection *prev;
6635 bfd_size_type total;
6636 bfd_boolean big_sec;
6637 bfd_vma curr_toc;
6638
6639 curr = tail;
6640 if (tail->_cooked_size)
6641 total = tail->_cooked_size;
6642 else
6643 total = tail->_raw_size;
6644 big_sec = total >= stub_group_size;
6645 curr_toc = htab->stub_group[tail->id].toc_off;
6646
6647 while ((prev = PREV_SEC (curr)) != NULL
6648 && ((total += curr->output_offset - prev->output_offset)
6649 < stub_group_size)
6650 && htab->stub_group[prev->id].toc_off == curr_toc)
6651 curr = prev;
6652
6653 /* OK, the size from the start of CURR to the end is less
6654 than stub_group_size and thus can be handled by one stub
6655 section. (or the tail section is itself larger than
6656 stub_group_size, in which case we may be toast.) We
6657 should really be keeping track of the total size of stubs
6658 added here, as stubs contribute to the final output
6659 section size. That's a little tricky, and this way will
6660 only break if stubs added make the total size more than
6661 2^25, ie. for the default stub_group_size, if stubs total
6662 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6663 do
6664 {
6665 prev = PREV_SEC (tail);
6666 /* Set up this stub group. */
6667 htab->stub_group[tail->id].link_sec = curr;
6668 }
6669 while (tail != curr && (tail = prev) != NULL);
6670
6671 /* But wait, there's more! Input sections up to stub_group_size
6672 bytes before the stub section can be handled by it too.
6673 Don't do this if we have a really large section after the
6674 stubs, as adding more stubs increases the chance that
6675 branches may not reach into the stub section. */
6676 if (!stubs_always_before_branch && !big_sec)
6677 {
6678 total = 0;
6679 while (prev != NULL
6680 && ((total += tail->output_offset - prev->output_offset)
6681 < stub_group_size)
6682 && htab->stub_group[prev->id].toc_off == curr_toc)
6683 {
6684 tail = prev;
6685 prev = PREV_SEC (tail);
6686 htab->stub_group[tail->id].link_sec = curr;
6687 }
6688 }
6689 tail = prev;
6690 }
6691 }
6692 while (list-- != htab->input_list);
6693 free (htab->input_list);
6694 #undef PREV_SEC
6695 }
6696
6697 /* Determine and set the size of the stub section for a final link.
6698
6699 The basic idea here is to examine all the relocations looking for
6700 PC-relative calls to a target that is unreachable with a "bl"
6701 instruction. */
6702
6703 bfd_boolean
6704 ppc64_elf_size_stubs (bfd *output_bfd,
6705 struct bfd_link_info *info,
6706 bfd_signed_vma group_size,
6707 asection *(*add_stub_section) (const char *, asection *),
6708 void (*layout_sections_again) (void))
6709 {
6710 bfd_size_type stub_group_size;
6711 bfd_boolean stubs_always_before_branch;
6712 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6713
6714 /* Stash our params away. */
6715 htab->add_stub_section = add_stub_section;
6716 htab->layout_sections_again = layout_sections_again;
6717 stubs_always_before_branch = group_size < 0;
6718 if (group_size < 0)
6719 stub_group_size = -group_size;
6720 else
6721 stub_group_size = group_size;
6722 if (stub_group_size == 1)
6723 {
6724 /* Default values. */
6725 if (stubs_always_before_branch)
6726 {
6727 stub_group_size = 0x1e00000;
6728 if (htab->has_14bit_branch)
6729 stub_group_size = 0x7800;
6730 }
6731 else
6732 {
6733 stub_group_size = 0x1c00000;
6734 if (htab->has_14bit_branch)
6735 stub_group_size = 0x7000;
6736 }
6737 }
6738
6739 group_sections (htab, stub_group_size, stubs_always_before_branch);
6740
6741 while (1)
6742 {
6743 bfd *input_bfd;
6744 unsigned int bfd_indx;
6745 asection *stub_sec;
6746 bfd_boolean stub_changed;
6747
6748 htab->stub_iteration += 1;
6749 stub_changed = FALSE;
6750
6751 for (input_bfd = info->input_bfds, bfd_indx = 0;
6752 input_bfd != NULL;
6753 input_bfd = input_bfd->link_next, bfd_indx++)
6754 {
6755 Elf_Internal_Shdr *symtab_hdr;
6756 asection *section;
6757 Elf_Internal_Sym *local_syms = NULL;
6758
6759 /* We'll need the symbol table in a second. */
6760 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6761 if (symtab_hdr->sh_info == 0)
6762 continue;
6763
6764 /* Walk over each section attached to the input bfd. */
6765 for (section = input_bfd->sections;
6766 section != NULL;
6767 section = section->next)
6768 {
6769 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6770
6771 /* If there aren't any relocs, then there's nothing more
6772 to do. */
6773 if ((section->flags & SEC_RELOC) == 0
6774 || section->reloc_count == 0)
6775 continue;
6776
6777 /* If this section is a link-once section that will be
6778 discarded, then don't create any stubs. */
6779 if (section->output_section == NULL
6780 || section->output_section->owner != output_bfd)
6781 continue;
6782
6783 /* Get the relocs. */
6784 internal_relocs
6785 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6786 info->keep_memory);
6787 if (internal_relocs == NULL)
6788 goto error_ret_free_local;
6789
6790 /* Now examine each relocation. */
6791 irela = internal_relocs;
6792 irelaend = irela + section->reloc_count;
6793 for (; irela < irelaend; irela++)
6794 {
6795 enum elf_ppc64_reloc_type r_type;
6796 unsigned int r_indx;
6797 enum ppc_stub_type stub_type;
6798 struct ppc_stub_hash_entry *stub_entry;
6799 asection *sym_sec;
6800 bfd_vma sym_value;
6801 bfd_vma destination;
6802 struct ppc_link_hash_entry *hash;
6803 struct elf_link_hash_entry *h;
6804 Elf_Internal_Sym *sym;
6805 char *stub_name;
6806 const asection *id_sec;
6807
6808 r_type = ELF64_R_TYPE (irela->r_info);
6809 r_indx = ELF64_R_SYM (irela->r_info);
6810
6811 if (r_type >= R_PPC64_max)
6812 {
6813 bfd_set_error (bfd_error_bad_value);
6814 goto error_ret_free_internal;
6815 }
6816
6817 /* Only look for stubs on branch instructions. */
6818 if (r_type != R_PPC64_REL24
6819 && r_type != R_PPC64_REL14
6820 && r_type != R_PPC64_REL14_BRTAKEN
6821 && r_type != R_PPC64_REL14_BRNTAKEN)
6822 continue;
6823
6824 /* Now determine the call target, its name, value,
6825 section. */
6826 destination = 0;
6827 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6828 r_indx, input_bfd))
6829 goto error_ret_free_internal;
6830 hash = (struct ppc_link_hash_entry *) h;
6831
6832 if (hash == NULL)
6833 {
6834 /* It's a local symbol. */
6835 sym_value = sym->st_value;
6836 destination = (sym_value + irela->r_addend
6837 + sym_sec->output_offset
6838 + sym_sec->output_section->vma);
6839 }
6840 else
6841 {
6842 /* It's an external symbol. */
6843 sym_value = 0;
6844 if (hash->elf.root.type == bfd_link_hash_defined
6845 || hash->elf.root.type == bfd_link_hash_defweak)
6846 {
6847 sym_value = hash->elf.root.u.def.value;
6848 if (sym_sec->output_section != NULL)
6849 destination = (sym_value + irela->r_addend
6850 + sym_sec->output_offset
6851 + sym_sec->output_section->vma);
6852 }
6853 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6854 ;
6855 else if (hash->elf.root.type == bfd_link_hash_undefined)
6856 ;
6857 else
6858 {
6859 bfd_set_error (bfd_error_bad_value);
6860 goto error_ret_free_internal;
6861 }
6862 }
6863
6864 /* Determine what (if any) linker stub is needed. */
6865 stub_type = ppc_type_of_stub (section, irela, &hash,
6866 destination);
6867
6868 if (stub_type != ppc_stub_plt_call)
6869 {
6870 /* Check whether we need a TOC adjusting stub.
6871 Since the linker pastes together pieces from
6872 different object files when creating the
6873 _init and _fini functions, it may be that a
6874 call to what looks like a local sym is in
6875 fact a call needing a TOC adjustment. */
6876 if (sym_sec != NULL
6877 && sym_sec->output_section != NULL
6878 && (htab->stub_group[sym_sec->id].toc_off
6879 != htab->stub_group[section->id].toc_off)
6880 && sym_sec->has_gp_reloc
6881 && section->has_gp_reloc)
6882 stub_type = ppc_stub_long_branch_r2off;
6883 }
6884
6885 if (stub_type == ppc_stub_none)
6886 continue;
6887
6888 /* __tls_get_addr calls might be eliminated. */
6889 if (stub_type != ppc_stub_plt_call
6890 && hash != NULL
6891 && &hash->elf == htab->tls_get_addr
6892 && section->has_tls_reloc
6893 && irela != internal_relocs)
6894 {
6895 /* Get tls info. */
6896 char *tls_mask;
6897
6898 if (!get_tls_mask (&tls_mask, &local_syms,
6899 irela - 1, input_bfd))
6900 goto error_ret_free_internal;
6901 if (*tls_mask != 0)
6902 continue;
6903 }
6904
6905 /* Support for grouping stub sections. */
6906 id_sec = htab->stub_group[section->id].link_sec;
6907
6908 /* Get the name of this stub. */
6909 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6910 if (!stub_name)
6911 goto error_ret_free_internal;
6912
6913 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6914 stub_name, FALSE, FALSE);
6915 if (stub_entry != NULL)
6916 {
6917 /* The proper stub has already been created. */
6918 free (stub_name);
6919 continue;
6920 }
6921
6922 stub_entry = ppc_add_stub (stub_name, section, htab);
6923 if (stub_entry == NULL)
6924 {
6925 free (stub_name);
6926 error_ret_free_internal:
6927 if (elf_section_data (section)->relocs == NULL)
6928 free (internal_relocs);
6929 error_ret_free_local:
6930 if (local_syms != NULL
6931 && (symtab_hdr->contents
6932 != (unsigned char *) local_syms))
6933 free (local_syms);
6934 return FALSE;
6935 }
6936
6937 stub_entry->stub_type = stub_type;
6938 stub_entry->target_value = sym_value;
6939 stub_entry->target_section = sym_sec;
6940 stub_entry->h = hash;
6941 stub_entry->addend = irela->r_addend;
6942 stub_changed = TRUE;
6943 }
6944
6945 /* We're done with the internal relocs, free them. */
6946 if (elf_section_data (section)->relocs != internal_relocs)
6947 free (internal_relocs);
6948 }
6949
6950 if (local_syms != NULL
6951 && symtab_hdr->contents != (unsigned char *) local_syms)
6952 {
6953 if (!info->keep_memory)
6954 free (local_syms);
6955 else
6956 symtab_hdr->contents = (unsigned char *) local_syms;
6957 }
6958 }
6959
6960 if (!stub_changed)
6961 break;
6962
6963 /* OK, we've added some stubs. Find out the new size of the
6964 stub sections. */
6965 for (stub_sec = htab->stub_bfd->sections;
6966 stub_sec != NULL;
6967 stub_sec = stub_sec->next)
6968 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
6969 {
6970 stub_sec->_raw_size = 0;
6971 stub_sec->_cooked_size = 0;
6972 }
6973 htab->brlt->_raw_size = 0;
6974 htab->brlt->_cooked_size = 0;
6975
6976 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
6977
6978 /* Ask the linker to do its stuff. */
6979 (*htab->layout_sections_again) ();
6980 }
6981
6982 /* It would be nice to strip .branch_lt from the output if the
6983 section is empty, but it's too late. If we strip sections here,
6984 the dynamic symbol table is corrupted since the section symbol
6985 for the stripped section isn't written. */
6986
6987 return TRUE;
6988 }
6989
6990 /* Called after we have determined section placement. If sections
6991 move, we'll be called again. Provide a value for TOCstart. */
6992
6993 bfd_vma
6994 ppc64_elf_toc (bfd *obfd)
6995 {
6996 asection *s;
6997 bfd_vma TOCstart;
6998
6999 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7000 order. The TOC starts where the first of these sections starts. */
7001 s = bfd_get_section_by_name (obfd, ".got");
7002 if (s == NULL)
7003 s = bfd_get_section_by_name (obfd, ".toc");
7004 if (s == NULL)
7005 s = bfd_get_section_by_name (obfd, ".tocbss");
7006 if (s == NULL)
7007 s = bfd_get_section_by_name (obfd, ".plt");
7008 if (s == NULL)
7009 {
7010 /* This may happen for
7011 o references to TOC base (SYM@toc / TOC[tc0]) without a
7012 .toc directive
7013 o bad linker script
7014 o --gc-sections and empty TOC sections
7015
7016 FIXME: Warn user? */
7017
7018 /* Look for a likely section. We probably won't even be
7019 using TOCstart. */
7020 for (s = obfd->sections; s != NULL; s = s->next)
7021 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7022 == (SEC_ALLOC | SEC_SMALL_DATA))
7023 break;
7024 if (s == NULL)
7025 for (s = obfd->sections; s != NULL; s = s->next)
7026 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7027 == (SEC_ALLOC | SEC_SMALL_DATA))
7028 break;
7029 if (s == NULL)
7030 for (s = obfd->sections; s != NULL; s = s->next)
7031 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7032 break;
7033 if (s == NULL)
7034 for (s = obfd->sections; s != NULL; s = s->next)
7035 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7036 break;
7037 }
7038
7039 TOCstart = 0;
7040 if (s != NULL)
7041 TOCstart = s->output_section->vma + s->output_offset;
7042
7043 return TOCstart;
7044 }
7045
7046 /* Build all the stubs associated with the current output file.
7047 The stubs are kept in a hash table attached to the main linker
7048 hash table. This function is called via gldelf64ppc_finish. */
7049
7050 bfd_boolean
7051 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7052 struct bfd_link_info *info,
7053 char **stats)
7054 {
7055 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7056 asection *stub_sec;
7057 bfd_byte *p;
7058 int stub_sec_count = 0;
7059
7060 htab->emit_stub_syms = emit_stub_syms;
7061 for (stub_sec = htab->stub_bfd->sections;
7062 stub_sec != NULL;
7063 stub_sec = stub_sec->next)
7064 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7065 {
7066 bfd_size_type size;
7067
7068 /* Allocate memory to hold the linker stubs. */
7069 size = stub_sec->_raw_size;
7070 if (size != 0)
7071 {
7072 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7073 if (stub_sec->contents == NULL)
7074 return FALSE;
7075 }
7076 stub_sec->_cooked_size = 0;
7077 }
7078
7079 if (htab->plt != NULL)
7080 {
7081 unsigned int indx;
7082 bfd_vma plt0;
7083
7084 /* Build the .glink plt call stub. */
7085 plt0 = (htab->plt->output_section->vma
7086 + htab->plt->output_offset
7087 - (htab->glink->output_section->vma
7088 + htab->glink->output_offset
7089 + GLINK_CALL_STUB_SIZE));
7090 if (plt0 + 0x80008000 > 0xffffffff)
7091 {
7092 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7093 bfd_set_error (bfd_error_bad_value);
7094 return FALSE;
7095 }
7096
7097 p = htab->glink->contents;
7098 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7099 p += 4;
7100 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7101 p += 4;
7102 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7103 p += 4;
7104 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7105 p += 4;
7106 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7107 p += 4;
7108 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7109 p += 4;
7110 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7111 p += 4;
7112 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7113 p += 4;
7114 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7115 p += 4;
7116 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7117 p += 4;
7118 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7119 p += 4;
7120 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7121 p += 4;
7122 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7123 p += 4;
7124 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7125 p += 4;
7126 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7127 p += 4;
7128 bfd_put_32 (htab->glink->owner, BCTR, p);
7129 p += 4;
7130
7131 /* Build the .glink lazy link call stubs. */
7132 indx = 0;
7133 while (p < htab->glink->contents + htab->glink->_raw_size)
7134 {
7135 if (indx < 0x8000)
7136 {
7137 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7138 p += 4;
7139 }
7140 else
7141 {
7142 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7143 p += 4;
7144 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7145 p += 4;
7146 }
7147 bfd_put_32 (htab->glink->owner,
7148 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7149 indx++;
7150 p += 4;
7151 }
7152 htab->glink->_cooked_size = p - htab->glink->contents;
7153 }
7154
7155 if (htab->brlt->_raw_size != 0)
7156 {
7157 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7158 htab->brlt->_raw_size);
7159 if (htab->brlt->contents == NULL)
7160 return FALSE;
7161 }
7162
7163 /* Build the stubs as directed by the stub hash table. */
7164 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7165
7166 for (stub_sec = htab->stub_bfd->sections;
7167 stub_sec != NULL;
7168 stub_sec = stub_sec->next)
7169 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7170 {
7171 stub_sec_count += 1;
7172 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7173 break;
7174 }
7175
7176 if (stub_sec != NULL
7177 || htab->glink->_raw_size != htab->glink->_cooked_size)
7178 {
7179 htab->stub_error = TRUE;
7180 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7181 }
7182
7183 if (htab->stub_error)
7184 return FALSE;
7185
7186 if (stats != NULL)
7187 {
7188 *stats = bfd_malloc (500);
7189 if (*stats == NULL)
7190 return FALSE;
7191
7192 sprintf (*stats, _("linker stubs in %u groups\n"
7193 " branch %lu\n"
7194 " toc adjust %lu\n"
7195 " long branch %lu\n"
7196 " long toc adj %lu\n"
7197 " plt call %lu"),
7198 stub_sec_count,
7199 htab->stub_count[ppc_stub_long_branch - 1],
7200 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7201 htab->stub_count[ppc_stub_plt_branch - 1],
7202 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7203 htab->stub_count[ppc_stub_plt_call - 1]);
7204 }
7205 return TRUE;
7206 }
7207
7208 /* The RELOCATE_SECTION function is called by the ELF backend linker
7209 to handle the relocations for a section.
7210
7211 The relocs are always passed as Rela structures; if the section
7212 actually uses Rel structures, the r_addend field will always be
7213 zero.
7214
7215 This function is responsible for adjust the section contents as
7216 necessary, and (if using Rela relocs and generating a
7217 relocatable output file) adjusting the reloc addend as
7218 necessary.
7219
7220 This function does not have to worry about setting the reloc
7221 address or the reloc symbol index.
7222
7223 LOCAL_SYMS is a pointer to the swapped in local symbols.
7224
7225 LOCAL_SECTIONS is an array giving the section in the input file
7226 corresponding to the st_shndx field of each local symbol.
7227
7228 The global hash table entry for the global symbols can be found
7229 via elf_sym_hashes (input_bfd).
7230
7231 When generating relocatable output, this function must handle
7232 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7233 going to be the section symbol corresponding to the output
7234 section, which means that the addend must be adjusted
7235 accordingly. */
7236
7237 static bfd_boolean
7238 ppc64_elf_relocate_section (bfd *output_bfd,
7239 struct bfd_link_info *info,
7240 bfd *input_bfd,
7241 asection *input_section,
7242 bfd_byte *contents,
7243 Elf_Internal_Rela *relocs,
7244 Elf_Internal_Sym *local_syms,
7245 asection **local_sections)
7246 {
7247 struct ppc_link_hash_table *htab;
7248 Elf_Internal_Shdr *symtab_hdr;
7249 struct elf_link_hash_entry **sym_hashes;
7250 Elf_Internal_Rela *rel;
7251 Elf_Internal_Rela *relend;
7252 Elf_Internal_Rela outrel;
7253 bfd_byte *loc;
7254 struct got_entry **local_got_ents;
7255 bfd_vma TOCstart;
7256 bfd_boolean ret = TRUE;
7257 bfd_boolean is_opd;
7258 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7259 bfd_boolean is_power4 = FALSE;
7260
7261 if (info->relocatable)
7262 return TRUE;
7263
7264 /* Initialize howto table if needed. */
7265 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7266 ppc_howto_init ();
7267
7268 htab = ppc_hash_table (info);
7269 local_got_ents = elf_local_got_ents (input_bfd);
7270 TOCstart = elf_gp (output_bfd);
7271 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7272 sym_hashes = elf_sym_hashes (input_bfd);
7273 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7274
7275 rel = relocs;
7276 relend = relocs + input_section->reloc_count;
7277 for (; rel < relend; rel++)
7278 {
7279 enum elf_ppc64_reloc_type r_type;
7280 bfd_vma addend;
7281 bfd_reloc_status_type r;
7282 Elf_Internal_Sym *sym;
7283 asection *sec;
7284 struct elf_link_hash_entry *h;
7285 struct elf_link_hash_entry *fdh;
7286 const char *sym_name;
7287 unsigned long r_symndx;
7288 char tls_mask, tls_gd, tls_type;
7289 bfd_vma relocation;
7290 bfd_boolean unresolved_reloc;
7291 bfd_boolean warned;
7292 unsigned long insn, mask;
7293 struct ppc_stub_hash_entry *stub_entry;
7294 bfd_vma max_br_offset;
7295 bfd_vma from;
7296
7297 r_type = ELF64_R_TYPE (rel->r_info);
7298 r_symndx = ELF64_R_SYM (rel->r_info);
7299 sym = NULL;
7300 sec = NULL;
7301 h = NULL;
7302 sym_name = NULL;
7303 unresolved_reloc = FALSE;
7304 warned = FALSE;
7305
7306 if (r_symndx < symtab_hdr->sh_info)
7307 {
7308 /* It's a local symbol. */
7309 sym = local_syms + r_symndx;
7310 sec = local_sections[r_symndx];
7311 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7312 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
7313 if (elf_section_data (sec) != NULL)
7314 {
7315 long *opd_sym_adjust;
7316
7317 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7318 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7319 relocation += opd_sym_adjust[sym->st_value / 24];
7320 }
7321 }
7322 else
7323 {
7324 /* It's a global symbol. */
7325 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7326 while (h->root.type == bfd_link_hash_indirect
7327 || h->root.type == bfd_link_hash_warning)
7328 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7329 sym_name = h->root.root.string;
7330 relocation = 0;
7331 if (h->root.type == bfd_link_hash_defined
7332 || h->root.type == bfd_link_hash_defweak)
7333 {
7334 sec = h->root.u.def.section;
7335 if (sec->output_section == NULL)
7336 /* Set a flag that will be cleared later if we find a
7337 relocation value for this symbol. output_section
7338 is typically NULL for symbols satisfied by a shared
7339 library. */
7340 unresolved_reloc = TRUE;
7341 else
7342 relocation = (h->root.u.def.value
7343 + sec->output_section->vma
7344 + sec->output_offset);
7345 }
7346 else if (h->root.type == bfd_link_hash_undefweak)
7347 ;
7348 else if (!info->executable
7349 && !info->no_undefined
7350 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
7351 ;
7352 else
7353 {
7354 if (! ((*info->callbacks->undefined_symbol)
7355 (info, h->root.root.string, input_bfd, input_section,
7356 rel->r_offset, (!info->shared
7357 || info->no_undefined
7358 || ELF_ST_VISIBILITY (h->other)))))
7359 return FALSE;
7360 warned = TRUE;
7361 }
7362 }
7363
7364 /* TLS optimizations. Replace instruction sequences and relocs
7365 based on information we collected in tls_optimize. We edit
7366 RELOCS so that --emit-relocs will output something sensible
7367 for the final instruction stream. */
7368 tls_mask = 0;
7369 tls_gd = 0;
7370 if (IS_PPC64_TLS_RELOC (r_type))
7371 {
7372 if (h != NULL)
7373 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7374 else if (local_got_ents != NULL)
7375 {
7376 char *lgot_masks;
7377 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7378 tls_mask = lgot_masks[r_symndx];
7379 }
7380 }
7381
7382 /* Ensure reloc mapping code below stays sane. */
7383 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7384 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7385 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7386 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7387 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7388 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7389 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7390 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7391 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7392 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7393 abort ();
7394 switch (r_type)
7395 {
7396 default:
7397 break;
7398
7399 case R_PPC64_TOC16:
7400 case R_PPC64_TOC16_LO:
7401 case R_PPC64_TOC16_DS:
7402 case R_PPC64_TOC16_LO_DS:
7403 {
7404 /* Check for toc tls entries. */
7405 char *toc_tls;
7406 int retval;
7407
7408 retval = get_tls_mask (&toc_tls, &local_syms, rel, input_bfd);
7409 if (retval == 0)
7410 return FALSE;
7411
7412 if (toc_tls)
7413 {
7414 tls_mask = *toc_tls;
7415 if (r_type == R_PPC64_TOC16_DS
7416 || r_type == R_PPC64_TOC16_LO_DS)
7417 {
7418 if (tls_mask != 0
7419 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7420 goto toctprel;
7421 }
7422 else
7423 {
7424 /* If we found a GD reloc pair, then we might be
7425 doing a GD->IE transition. */
7426 if (retval == 2)
7427 {
7428 tls_gd = TLS_TPRELGD;
7429 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7430 goto tls_get_addr_check;
7431 }
7432 else if (retval == 3)
7433 {
7434 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7435 goto tls_get_addr_check;
7436 }
7437 }
7438 }
7439 }
7440 break;
7441
7442 case R_PPC64_GOT_TPREL16_DS:
7443 case R_PPC64_GOT_TPREL16_LO_DS:
7444 if (tls_mask != 0
7445 && (tls_mask & TLS_TPREL) == 0)
7446 {
7447 toctprel:
7448 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7449 insn &= 31 << 21;
7450 insn |= 0x3c0d0000; /* addis 0,13,0 */
7451 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7452 r_type = R_PPC64_TPREL16_HA;
7453 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7454 }
7455 break;
7456
7457 case R_PPC64_TLS:
7458 if (tls_mask == 0)
7459 {
7460 /* Check for toc tls entries. */
7461 char *toc_tls;
7462
7463 if (!get_tls_mask (&toc_tls, &local_syms, rel, input_bfd))
7464 return FALSE;
7465
7466 if (toc_tls)
7467 tls_mask = *toc_tls;
7468 }
7469 if (tls_mask != 0
7470 && (tls_mask & TLS_TPREL) == 0)
7471 {
7472 bfd_vma rtra;
7473 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7474 if ((insn & ((0x3f << 26) | (31 << 11)))
7475 == ((31 << 26) | (13 << 11)))
7476 rtra = insn & ((1 << 26) - (1 << 16));
7477 else if ((insn & ((0x3f << 26) | (31 << 16)))
7478 == ((31 << 26) | (13 << 16)))
7479 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7480 else
7481 abort ();
7482 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7483 /* add -> addi. */
7484 insn = 14 << 26;
7485 else if ((insn & (31 << 1)) == 23 << 1
7486 && ((insn & (31 << 6)) < 14 << 6
7487 || ((insn & (31 << 6)) >= 16 << 6
7488 && (insn & (31 << 6)) < 24 << 6)))
7489 /* load and store indexed -> dform. */
7490 insn = (32 | ((insn >> 6) & 31)) << 26;
7491 else if ((insn & (31 << 1)) == 21 << 1
7492 && (insn & (0x1a << 6)) == 0)
7493 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7494 insn = (((58 | ((insn >> 6) & 4)) << 26)
7495 | ((insn >> 6) & 1));
7496 else if ((insn & (31 << 1)) == 21 << 1
7497 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7498 /* lwax -> lwa. */
7499 insn = (58 << 26) | 2;
7500 else
7501 abort ();
7502 insn |= rtra;
7503 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7504 r_type = R_PPC64_TPREL16_LO;
7505 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7506 /* Was PPC64_TLS which sits on insn boundary, now
7507 PPC64_TPREL16_LO which is at insn+2. */
7508 rel->r_offset += 2;
7509 }
7510 break;
7511
7512 case R_PPC64_GOT_TLSGD16_HI:
7513 case R_PPC64_GOT_TLSGD16_HA:
7514 tls_gd = TLS_TPRELGD;
7515 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7516 goto tls_gdld_hi;
7517 break;
7518
7519 case R_PPC64_GOT_TLSLD16_HI:
7520 case R_PPC64_GOT_TLSLD16_HA:
7521 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7522 {
7523 tls_gdld_hi:
7524 if ((tls_mask & tls_gd) != 0)
7525 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7526 + R_PPC64_GOT_TPREL16_DS);
7527 else
7528 {
7529 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7530 rel->r_offset -= 2;
7531 r_type = R_PPC64_NONE;
7532 }
7533 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7534 }
7535 break;
7536
7537 case R_PPC64_GOT_TLSGD16:
7538 case R_PPC64_GOT_TLSGD16_LO:
7539 tls_gd = TLS_TPRELGD;
7540 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7541 goto tls_get_addr_check;
7542 break;
7543
7544 case R_PPC64_GOT_TLSLD16:
7545 case R_PPC64_GOT_TLSLD16_LO:
7546 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7547 {
7548 tls_get_addr_check:
7549 if (rel + 1 < relend)
7550 {
7551 enum elf_ppc64_reloc_type r_type2;
7552 unsigned long r_symndx2;
7553 struct elf_link_hash_entry *h2;
7554 bfd_vma insn1, insn2, insn3;
7555 bfd_vma offset;
7556
7557 /* The next instruction should be a call to
7558 __tls_get_addr. Peek at the reloc to be sure. */
7559 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7560 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7561 if (r_symndx2 < symtab_hdr->sh_info
7562 || (r_type2 != R_PPC64_REL14
7563 && r_type2 != R_PPC64_REL14_BRTAKEN
7564 && r_type2 != R_PPC64_REL14_BRNTAKEN
7565 && r_type2 != R_PPC64_REL24))
7566 break;
7567
7568 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7569 while (h2->root.type == bfd_link_hash_indirect
7570 || h2->root.type == bfd_link_hash_warning)
7571 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7572 if (h2 == NULL || h2 != htab->tls_get_addr)
7573 break;
7574
7575 /* OK, it checks out. Replace the call. */
7576 offset = rel[1].r_offset;
7577 insn1 = bfd_get_32 (output_bfd,
7578 contents + rel->r_offset - 2);
7579 insn3 = bfd_get_32 (output_bfd,
7580 contents + offset + 4);
7581 if ((tls_mask & tls_gd) != 0)
7582 {
7583 /* IE */
7584 insn1 &= (1 << 26) - (1 << 2);
7585 insn1 |= 58 << 26; /* ld */
7586 insn2 = 0x7c636a14; /* add 3,3,13 */
7587 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7588 if ((tls_mask & TLS_EXPLICIT) == 0)
7589 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7590 + R_PPC64_GOT_TPREL16_DS);
7591 else
7592 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7593 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7594 }
7595 else
7596 {
7597 /* LE */
7598 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7599 insn2 = 0x38630000; /* addi 3,3,0 */
7600 if (tls_gd == 0)
7601 {
7602 /* Was an LD reloc. */
7603 r_symndx = 0;
7604 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
7605 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
7606 }
7607 r_type = R_PPC64_TPREL16_HA;
7608 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7609 rel[1].r_info = ELF64_R_INFO (r_symndx,
7610 R_PPC64_TPREL16_LO);
7611 rel[1].r_offset += 2;
7612 }
7613 if (insn3 == NOP
7614 || insn3 == CROR_151515 || insn3 == CROR_313131)
7615 {
7616 insn3 = insn2;
7617 insn2 = NOP;
7618 rel[1].r_offset += 4;
7619 }
7620 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7621 bfd_put_32 (output_bfd, insn2, contents + offset);
7622 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7623 if (tls_gd == 0)
7624 {
7625 /* We changed the symbol on an LD reloc. Start over
7626 in order to get h, sym, sec etc. right. */
7627 rel--;
7628 continue;
7629 }
7630 }
7631 }
7632 break;
7633
7634 case R_PPC64_DTPMOD64:
7635 if (rel + 1 < relend
7636 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7637 && rel[1].r_offset == rel->r_offset + 8)
7638 {
7639 if ((tls_mask & TLS_GD) == 0)
7640 {
7641 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7642 if ((tls_mask & TLS_TPRELGD) != 0)
7643 r_type = R_PPC64_TPREL64;
7644 else
7645 {
7646 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7647 r_type = R_PPC64_NONE;
7648 }
7649 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7650 }
7651 }
7652 else
7653 {
7654 if ((tls_mask & TLS_LD) == 0)
7655 {
7656 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7657 r_type = R_PPC64_NONE;
7658 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7659 }
7660 }
7661 break;
7662
7663 case R_PPC64_TPREL64:
7664 if ((tls_mask & TLS_TPREL) == 0)
7665 {
7666 r_type = R_PPC64_NONE;
7667 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7668 }
7669 break;
7670 }
7671
7672 /* Handle other relocations that tweak non-addend part of insn. */
7673 insn = 0;
7674 switch (r_type)
7675 {
7676 default:
7677 break;
7678
7679 /* Branch taken prediction relocations. */
7680 case R_PPC64_ADDR14_BRTAKEN:
7681 case R_PPC64_REL14_BRTAKEN:
7682 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7683 /* Fall thru. */
7684
7685 /* Branch not taken prediction relocations. */
7686 case R_PPC64_ADDR14_BRNTAKEN:
7687 case R_PPC64_REL14_BRNTAKEN:
7688 insn |= bfd_get_32 (output_bfd,
7689 contents + rel->r_offset) & ~(0x01 << 21);
7690 if (is_power4)
7691 {
7692 /* Set 'a' bit. This is 0b00010 in BO field for branch
7693 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7694 for branch on CTR insns (BO == 1a00t or 1a01t). */
7695 if ((insn & (0x14 << 21)) == (0x04 << 21))
7696 insn |= 0x02 << 21;
7697 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7698 insn |= 0x08 << 21;
7699 else
7700 break;
7701 }
7702 else
7703 {
7704 from = (rel->r_offset
7705 + input_section->output_offset
7706 + input_section->output_section->vma);
7707
7708 /* Invert 'y' bit if not the default. */
7709 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7710 insn ^= 0x01 << 21;
7711 }
7712
7713 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7714 break;
7715
7716 case R_PPC64_REL24:
7717 /* Calls to functions with a different TOC, such as calls to
7718 shared objects, need to alter the TOC pointer. This is
7719 done using a linkage stub. A REL24 branching to these
7720 linkage stubs needs to be followed by a nop, as the nop
7721 will be replaced with an instruction to restore the TOC
7722 base pointer. */
7723 if (((h != NULL
7724 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7725 && fdh->plt.plist != NULL)
7726 || ((fdh = h, sec) != NULL
7727 && sec->output_section != NULL
7728 && (htab->stub_group[sec->id].toc_off
7729 != htab->stub_group[input_section->id].toc_off)))
7730 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7731 rel, htab)) != NULL
7732 && (stub_entry->stub_type == ppc_stub_plt_call
7733 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7734 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7735 {
7736 bfd_boolean can_plt_call = 0;
7737
7738 if (rel->r_offset + 8 <= input_section->_cooked_size)
7739 {
7740 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7741 if (insn == NOP
7742 || insn == CROR_151515 || insn == CROR_313131)
7743 {
7744 bfd_put_32 (input_bfd, LD_R2_40R1,
7745 contents + rel->r_offset + 4);
7746 can_plt_call = 1;
7747 }
7748 }
7749
7750 if (!can_plt_call)
7751 {
7752 if (stub_entry->stub_type == ppc_stub_plt_call)
7753 {
7754 /* If this is a plain branch rather than a branch
7755 and link, don't require a nop. */
7756 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7757 if ((insn & 1) == 0)
7758 can_plt_call = 1;
7759 }
7760 else
7761 {
7762 if (strcmp (input_section->output_section->name,
7763 ".init") == 0
7764 || strcmp (input_section->output_section->name,
7765 ".fini") == 0)
7766 (*_bfd_error_handler)
7767 (_("%s(%s+0x%lx): automatic multiple TOCs "
7768 "not supported using your crt files; "
7769 "recompile with -mminimal-toc or upgrade gcc"),
7770 bfd_archive_filename (input_bfd),
7771 input_section->name,
7772 (long) rel->r_offset);
7773 else
7774 (*_bfd_error_handler)
7775 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7776 "does not allow automatic multiple TOCs; "
7777 "recompile with -mminimal-toc or "
7778 "-fno-optimize-sibling-calls, "
7779 "or make `%s' extern"),
7780 bfd_archive_filename (input_bfd),
7781 input_section->name,
7782 (long) rel->r_offset,
7783 sym_name,
7784 sym_name);
7785 bfd_set_error (bfd_error_bad_value);
7786 ret = FALSE;
7787 }
7788 }
7789
7790 if (can_plt_call)
7791 {
7792 relocation = (stub_entry->stub_offset
7793 + stub_entry->stub_sec->output_offset
7794 + stub_entry->stub_sec->output_section->vma);
7795 if (stub_entry->stub_type == ppc_stub_plt_call)
7796 unresolved_reloc = FALSE;
7797 }
7798 }
7799
7800 if (h != NULL
7801 && h->root.type == bfd_link_hash_undefweak
7802 && relocation == 0
7803 && rel->r_addend == 0)
7804 {
7805 /* Tweak calls to undefined weak functions to point at a
7806 blr. We can thus call a weak function without first
7807 checking whether the function is defined. We have a
7808 blr at the end of .sfpr. */
7809 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7810 relocation = (htab->sfpr->_raw_size - 4
7811 + htab->sfpr->output_offset
7812 + htab->sfpr->output_section->vma);
7813 from = (rel->r_offset
7814 + input_section->output_offset
7815 + input_section->output_section->vma);
7816
7817 /* But let's not be silly about it. If the blr isn't in
7818 reach, just go to the next instruction. */
7819 if (relocation - from + (1 << 25) >= (1 << 26)
7820 || htab->sfpr->_raw_size == 0)
7821 relocation = from + 4;
7822 }
7823 break;
7824 }
7825
7826 /* Set `addend'. */
7827 tls_type = 0;
7828 addend = rel->r_addend;
7829 switch (r_type)
7830 {
7831 default:
7832 (*_bfd_error_handler)
7833 (_("%s: unknown relocation type %d for symbol %s"),
7834 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7835
7836 bfd_set_error (bfd_error_bad_value);
7837 ret = FALSE;
7838 continue;
7839
7840 case R_PPC64_NONE:
7841 case R_PPC64_TLS:
7842 case R_PPC64_GNU_VTINHERIT:
7843 case R_PPC64_GNU_VTENTRY:
7844 continue;
7845
7846 /* GOT16 relocations. Like an ADDR16 using the symbol's
7847 address in the GOT as relocation value instead of the
7848 symbol's value itself. Also, create a GOT entry for the
7849 symbol and put the symbol value there. */
7850 case R_PPC64_GOT_TLSGD16:
7851 case R_PPC64_GOT_TLSGD16_LO:
7852 case R_PPC64_GOT_TLSGD16_HI:
7853 case R_PPC64_GOT_TLSGD16_HA:
7854 tls_type = TLS_TLS | TLS_GD;
7855 goto dogot;
7856
7857 case R_PPC64_GOT_TLSLD16:
7858 case R_PPC64_GOT_TLSLD16_LO:
7859 case R_PPC64_GOT_TLSLD16_HI:
7860 case R_PPC64_GOT_TLSLD16_HA:
7861 tls_type = TLS_TLS | TLS_LD;
7862 goto dogot;
7863
7864 case R_PPC64_GOT_TPREL16_DS:
7865 case R_PPC64_GOT_TPREL16_LO_DS:
7866 case R_PPC64_GOT_TPREL16_HI:
7867 case R_PPC64_GOT_TPREL16_HA:
7868 tls_type = TLS_TLS | TLS_TPREL;
7869 goto dogot;
7870
7871 case R_PPC64_GOT_DTPREL16_DS:
7872 case R_PPC64_GOT_DTPREL16_LO_DS:
7873 case R_PPC64_GOT_DTPREL16_HI:
7874 case R_PPC64_GOT_DTPREL16_HA:
7875 tls_type = TLS_TLS | TLS_DTPREL;
7876 goto dogot;
7877
7878 case R_PPC64_GOT16:
7879 case R_PPC64_GOT16_LO:
7880 case R_PPC64_GOT16_HI:
7881 case R_PPC64_GOT16_HA:
7882 case R_PPC64_GOT16_DS:
7883 case R_PPC64_GOT16_LO_DS:
7884 dogot:
7885 {
7886 /* Relocation is to the entry for this symbol in the global
7887 offset table. */
7888 asection *got;
7889 bfd_vma *offp;
7890 bfd_vma off;
7891 unsigned long indx = 0;
7892
7893 if (tls_type == (TLS_TLS | TLS_LD)
7894 && (h == NULL
7895 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
7896 offp = &ppc64_tlsld_got (input_bfd)->offset;
7897 else
7898 {
7899 struct got_entry *ent;
7900
7901 if (h != NULL)
7902 {
7903 bfd_boolean dyn = htab->elf.dynamic_sections_created;
7904 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7905 || (info->shared
7906 && SYMBOL_REFERENCES_LOCAL (info, h)))
7907 /* This is actually a static link, or it is a
7908 -Bsymbolic link and the symbol is defined
7909 locally, or the symbol was forced to be local
7910 because of a version file. */
7911 ;
7912 else
7913 {
7914 indx = h->dynindx;
7915 unresolved_reloc = FALSE;
7916 }
7917 ent = h->got.glist;
7918 }
7919 else
7920 {
7921 if (local_got_ents == NULL)
7922 abort ();
7923 ent = local_got_ents[r_symndx];
7924 }
7925
7926 for (; ent != NULL; ent = ent->next)
7927 if (ent->addend == rel->r_addend
7928 && ent->owner == input_bfd
7929 && ent->tls_type == tls_type)
7930 break;
7931 if (ent == NULL)
7932 abort ();
7933 offp = &ent->got.offset;
7934 }
7935
7936 got = ppc64_elf_tdata (input_bfd)->got;
7937 if (got == NULL)
7938 abort ();
7939
7940 /* The offset must always be a multiple of 8. We use the
7941 least significant bit to record whether we have already
7942 processed this entry. */
7943 off = *offp;
7944 if ((off & 1) != 0)
7945 off &= ~1;
7946 else
7947 {
7948 /* Generate relocs for the dynamic linker, except in
7949 the case of TLSLD where we'll use one entry per
7950 module. */
7951 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
7952
7953 *offp = off | 1;
7954 if ((info->shared || indx != 0)
7955 && (h == NULL
7956 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7957 || h->root.type != bfd_link_hash_undefweak))
7958 {
7959 outrel.r_offset = (got->output_section->vma
7960 + got->output_offset
7961 + off);
7962 outrel.r_addend = rel->r_addend;
7963 if (tls_type & (TLS_LD | TLS_GD))
7964 {
7965 outrel.r_addend = 0;
7966 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
7967 if (tls_type == (TLS_TLS | TLS_GD))
7968 {
7969 loc = relgot->contents;
7970 loc += (relgot->reloc_count++
7971 * sizeof (Elf64_External_Rela));
7972 bfd_elf64_swap_reloca_out (output_bfd,
7973 &outrel, loc);
7974 outrel.r_offset += 8;
7975 outrel.r_addend = rel->r_addend;
7976 outrel.r_info
7977 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
7978 }
7979 }
7980 else if (tls_type == (TLS_TLS | TLS_DTPREL))
7981 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
7982 else if (tls_type == (TLS_TLS | TLS_TPREL))
7983 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
7984 else if (indx == 0)
7985 {
7986 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
7987
7988 /* Write the .got section contents for the sake
7989 of prelink. */
7990 loc = got->contents + off;
7991 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
7992 loc);
7993 }
7994 else
7995 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
7996
7997 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
7998 {
7999 outrel.r_addend += relocation;
8000 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8001 outrel.r_addend -= htab->tls_sec->vma;
8002 }
8003 loc = relgot->contents;
8004 loc += (relgot->reloc_count++
8005 * sizeof (Elf64_External_Rela));
8006 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8007 }
8008
8009 /* Init the .got section contents here if we're not
8010 emitting a reloc. */
8011 else
8012 {
8013 relocation += rel->r_addend;
8014 if (tls_type == (TLS_TLS | TLS_LD))
8015 relocation = 1;
8016 else if (tls_type != 0)
8017 {
8018 relocation -= htab->tls_sec->vma + DTP_OFFSET;
8019 if (tls_type == (TLS_TLS | TLS_TPREL))
8020 relocation += DTP_OFFSET - TP_OFFSET;
8021
8022 if (tls_type == (TLS_TLS | TLS_GD))
8023 {
8024 bfd_put_64 (output_bfd, relocation,
8025 got->contents + off + 8);
8026 relocation = 1;
8027 }
8028 }
8029
8030 bfd_put_64 (output_bfd, relocation,
8031 got->contents + off);
8032 }
8033 }
8034
8035 if (off >= (bfd_vma) -2)
8036 abort ();
8037
8038 relocation = got->output_offset + off;
8039
8040 /* TOC base (r2) is TOC start plus 0x8000. */
8041 addend = -TOC_BASE_OFF;
8042 }
8043 break;
8044
8045 case R_PPC64_PLT16_HA:
8046 case R_PPC64_PLT16_HI:
8047 case R_PPC64_PLT16_LO:
8048 case R_PPC64_PLT32:
8049 case R_PPC64_PLT64:
8050 /* Relocation is to the entry for this symbol in the
8051 procedure linkage table. */
8052
8053 /* Resolve a PLT reloc against a local symbol directly,
8054 without using the procedure linkage table. */
8055 if (h == NULL)
8056 break;
8057
8058 /* It's possible that we didn't make a PLT entry for this
8059 symbol. This happens when statically linking PIC code,
8060 or when using -Bsymbolic. Go find a match if there is a
8061 PLT entry. */
8062 if (htab->plt != NULL)
8063 {
8064 struct plt_entry *ent;
8065 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8066 if (ent->addend == rel->r_addend
8067 && ent->plt.offset != (bfd_vma) -1)
8068 {
8069 relocation = (htab->plt->output_section->vma
8070 + htab->plt->output_offset
8071 + ent->plt.offset);
8072 unresolved_reloc = FALSE;
8073 }
8074 }
8075 break;
8076
8077 case R_PPC64_TOC:
8078 /* Relocation value is TOC base. */
8079 relocation = TOCstart;
8080 if (r_symndx == 0)
8081 relocation += htab->stub_group[input_section->id].toc_off;
8082 else if (sec != NULL && !unresolved_reloc)
8083 relocation += htab->stub_group[sec->id].toc_off;
8084 else
8085 unresolved_reloc = TRUE;
8086 goto dodyn2;
8087
8088 /* TOC16 relocs. We want the offset relative to the TOC base,
8089 which is the address of the start of the TOC plus 0x8000.
8090 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8091 in this order. */
8092 case R_PPC64_TOC16:
8093 case R_PPC64_TOC16_LO:
8094 case R_PPC64_TOC16_HI:
8095 case R_PPC64_TOC16_DS:
8096 case R_PPC64_TOC16_LO_DS:
8097 case R_PPC64_TOC16_HA:
8098 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8099 break;
8100
8101 /* Relocate against the beginning of the section. */
8102 case R_PPC64_SECTOFF:
8103 case R_PPC64_SECTOFF_LO:
8104 case R_PPC64_SECTOFF_HI:
8105 case R_PPC64_SECTOFF_DS:
8106 case R_PPC64_SECTOFF_LO_DS:
8107 case R_PPC64_SECTOFF_HA:
8108 if (sec != NULL)
8109 addend -= sec->output_section->vma;
8110 break;
8111
8112 case R_PPC64_REL14:
8113 case R_PPC64_REL14_BRNTAKEN:
8114 case R_PPC64_REL14_BRTAKEN:
8115 case R_PPC64_REL24:
8116 break;
8117
8118 case R_PPC64_TPREL16:
8119 case R_PPC64_TPREL16_LO:
8120 case R_PPC64_TPREL16_HI:
8121 case R_PPC64_TPREL16_HA:
8122 case R_PPC64_TPREL16_DS:
8123 case R_PPC64_TPREL16_LO_DS:
8124 case R_PPC64_TPREL16_HIGHER:
8125 case R_PPC64_TPREL16_HIGHERA:
8126 case R_PPC64_TPREL16_HIGHEST:
8127 case R_PPC64_TPREL16_HIGHESTA:
8128 addend -= htab->tls_sec->vma + TP_OFFSET;
8129 if (info->shared)
8130 /* The TPREL16 relocs shouldn't really be used in shared
8131 libs as they will result in DT_TEXTREL being set, but
8132 support them anyway. */
8133 goto dodyn;
8134 break;
8135
8136 case R_PPC64_DTPREL16:
8137 case R_PPC64_DTPREL16_LO:
8138 case R_PPC64_DTPREL16_HI:
8139 case R_PPC64_DTPREL16_HA:
8140 case R_PPC64_DTPREL16_DS:
8141 case R_PPC64_DTPREL16_LO_DS:
8142 case R_PPC64_DTPREL16_HIGHER:
8143 case R_PPC64_DTPREL16_HIGHERA:
8144 case R_PPC64_DTPREL16_HIGHEST:
8145 case R_PPC64_DTPREL16_HIGHESTA:
8146 addend -= htab->tls_sec->vma + DTP_OFFSET;
8147 break;
8148
8149 case R_PPC64_DTPMOD64:
8150 relocation = 1;
8151 addend = 0;
8152 goto dodyn;
8153
8154 case R_PPC64_TPREL64:
8155 addend -= htab->tls_sec->vma + TP_OFFSET;
8156 goto dodyn;
8157
8158 case R_PPC64_DTPREL64:
8159 addend -= htab->tls_sec->vma + DTP_OFFSET;
8160 /* Fall thru */
8161
8162 /* Relocations that may need to be propagated if this is a
8163 dynamic object. */
8164 case R_PPC64_REL30:
8165 case R_PPC64_REL32:
8166 case R_PPC64_REL64:
8167 case R_PPC64_ADDR14:
8168 case R_PPC64_ADDR14_BRNTAKEN:
8169 case R_PPC64_ADDR14_BRTAKEN:
8170 case R_PPC64_ADDR16:
8171 case R_PPC64_ADDR16_DS:
8172 case R_PPC64_ADDR16_HA:
8173 case R_PPC64_ADDR16_HI:
8174 case R_PPC64_ADDR16_HIGHER:
8175 case R_PPC64_ADDR16_HIGHERA:
8176 case R_PPC64_ADDR16_HIGHEST:
8177 case R_PPC64_ADDR16_HIGHESTA:
8178 case R_PPC64_ADDR16_LO:
8179 case R_PPC64_ADDR16_LO_DS:
8180 case R_PPC64_ADDR24:
8181 case R_PPC64_ADDR32:
8182 case R_PPC64_ADDR64:
8183 case R_PPC64_UADDR16:
8184 case R_PPC64_UADDR32:
8185 case R_PPC64_UADDR64:
8186 /* r_symndx will be zero only for relocs against symbols
8187 from removed linkonce sections, or sections discarded by
8188 a linker script. */
8189 dodyn:
8190 if (r_symndx == 0)
8191 break;
8192 /* Fall thru. */
8193
8194 dodyn2:
8195 if ((input_section->flags & SEC_ALLOC) == 0)
8196 break;
8197
8198 if (NO_OPD_RELOCS && is_opd)
8199 break;
8200
8201 if ((info->shared
8202 && (h == NULL
8203 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8204 || h->root.type != bfd_link_hash_undefweak)
8205 && (MUST_BE_DYN_RELOC (r_type)
8206 || !SYMBOL_CALLS_LOCAL (info, h)))
8207 || (ELIMINATE_COPY_RELOCS
8208 && !info->shared
8209 && h != NULL
8210 && h->dynindx != -1
8211 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8212 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8213 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8214 {
8215 Elf_Internal_Rela outrel;
8216 bfd_boolean skip, relocate;
8217 asection *sreloc;
8218 bfd_byte *loc;
8219 bfd_vma out_off;
8220
8221 /* When generating a dynamic object, these relocations
8222 are copied into the output file to be resolved at run
8223 time. */
8224
8225 skip = FALSE;
8226 relocate = FALSE;
8227
8228 out_off = _bfd_elf_section_offset (output_bfd, info,
8229 input_section, rel->r_offset);
8230 if (out_off == (bfd_vma) -1)
8231 skip = TRUE;
8232 else if (out_off == (bfd_vma) -2)
8233 skip = TRUE, relocate = TRUE;
8234 out_off += (input_section->output_section->vma
8235 + input_section->output_offset);
8236 outrel.r_offset = out_off;
8237 outrel.r_addend = rel->r_addend;
8238
8239 /* Optimize unaligned reloc use. */
8240 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8241 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8242 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8243 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8244 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8245 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8246 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8247 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8248 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8249
8250 if (skip)
8251 memset (&outrel, 0, sizeof outrel);
8252 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8253 && !is_opd
8254 && r_type != R_PPC64_TOC)
8255 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8256 else
8257 {
8258 /* This symbol is local, or marked to become local,
8259 or this is an opd section reloc which must point
8260 at a local function. */
8261 outrel.r_addend += relocation;
8262 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8263 {
8264 if (is_opd && h != NULL)
8265 {
8266 /* Lie about opd entries. This case occurs
8267 when building shared libraries and we
8268 reference a function in another shared
8269 lib. The same thing happens for a weak
8270 definition in an application that's
8271 overridden by a strong definition in a
8272 shared lib. (I believe this is a generic
8273 bug in binutils handling of weak syms.)
8274 In these cases we won't use the opd
8275 entry in this lib. */
8276 unresolved_reloc = FALSE;
8277 }
8278 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8279
8280 /* We need to relocate .opd contents for ld.so.
8281 Prelink also wants simple and consistent rules
8282 for relocs. This make all RELATIVE relocs have
8283 *r_offset equal to r_addend. */
8284 relocate = TRUE;
8285 }
8286 else
8287 {
8288 long indx = 0;
8289
8290 if (bfd_is_abs_section (sec))
8291 ;
8292 else if (sec == NULL || sec->owner == NULL)
8293 {
8294 bfd_set_error (bfd_error_bad_value);
8295 return FALSE;
8296 }
8297 else
8298 {
8299 asection *osec;
8300
8301 osec = sec->output_section;
8302 indx = elf_section_data (osec)->dynindx;
8303
8304 /* We are turning this relocation into one
8305 against a section symbol, so subtract out
8306 the output section's address but not the
8307 offset of the input section in the output
8308 section. */
8309 outrel.r_addend -= osec->vma;
8310 }
8311
8312 outrel.r_info = ELF64_R_INFO (indx, r_type);
8313 }
8314 }
8315
8316 sreloc = elf_section_data (input_section)->sreloc;
8317 if (sreloc == NULL)
8318 abort ();
8319
8320 loc = sreloc->contents;
8321 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8322 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8323
8324 /* If this reloc is against an external symbol, it will
8325 be computed at runtime, so there's no need to do
8326 anything now. However, for the sake of prelink ensure
8327 that the section contents are a known value. */
8328 if (! relocate)
8329 {
8330 unresolved_reloc = FALSE;
8331 /* The value chosen here is quite arbitrary as ld.so
8332 ignores section contents except for the special
8333 case of .opd where the contents might be accessed
8334 before relocation. Choose zero, as that won't
8335 cause reloc overflow. */
8336 relocation = 0;
8337 addend = 0;
8338 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8339 to improve backward compatibility with older
8340 versions of ld. */
8341 if (r_type == R_PPC64_ADDR64)
8342 addend = outrel.r_addend;
8343 /* Adjust pc_relative relocs to have zero in *r_offset. */
8344 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8345 addend = (input_section->output_section->vma
8346 + input_section->output_offset
8347 + rel->r_offset);
8348 }
8349 }
8350 break;
8351
8352 case R_PPC64_COPY:
8353 case R_PPC64_GLOB_DAT:
8354 case R_PPC64_JMP_SLOT:
8355 case R_PPC64_RELATIVE:
8356 /* We shouldn't ever see these dynamic relocs in relocatable
8357 files. */
8358 /* Fall through. */
8359
8360 case R_PPC64_PLTGOT16:
8361 case R_PPC64_PLTGOT16_DS:
8362 case R_PPC64_PLTGOT16_HA:
8363 case R_PPC64_PLTGOT16_HI:
8364 case R_PPC64_PLTGOT16_LO:
8365 case R_PPC64_PLTGOT16_LO_DS:
8366 case R_PPC64_PLTREL32:
8367 case R_PPC64_PLTREL64:
8368 /* These ones haven't been implemented yet. */
8369
8370 (*_bfd_error_handler)
8371 (_("%s: relocation %s is not supported for symbol %s."),
8372 bfd_archive_filename (input_bfd),
8373 ppc64_elf_howto_table[r_type]->name, sym_name);
8374
8375 bfd_set_error (bfd_error_invalid_operation);
8376 ret = FALSE;
8377 continue;
8378 }
8379
8380 /* Do any further special processing. */
8381 switch (r_type)
8382 {
8383 default:
8384 break;
8385
8386 case R_PPC64_ADDR16_HA:
8387 case R_PPC64_ADDR16_HIGHERA:
8388 case R_PPC64_ADDR16_HIGHESTA:
8389 case R_PPC64_GOT16_HA:
8390 case R_PPC64_PLTGOT16_HA:
8391 case R_PPC64_PLT16_HA:
8392 case R_PPC64_TOC16_HA:
8393 case R_PPC64_SECTOFF_HA:
8394 case R_PPC64_TPREL16_HA:
8395 case R_PPC64_DTPREL16_HA:
8396 case R_PPC64_GOT_TLSGD16_HA:
8397 case R_PPC64_GOT_TLSLD16_HA:
8398 case R_PPC64_GOT_TPREL16_HA:
8399 case R_PPC64_GOT_DTPREL16_HA:
8400 case R_PPC64_TPREL16_HIGHER:
8401 case R_PPC64_TPREL16_HIGHERA:
8402 case R_PPC64_TPREL16_HIGHEST:
8403 case R_PPC64_TPREL16_HIGHESTA:
8404 case R_PPC64_DTPREL16_HIGHER:
8405 case R_PPC64_DTPREL16_HIGHERA:
8406 case R_PPC64_DTPREL16_HIGHEST:
8407 case R_PPC64_DTPREL16_HIGHESTA:
8408 /* It's just possible that this symbol is a weak symbol
8409 that's not actually defined anywhere. In that case,
8410 'sec' would be NULL, and we should leave the symbol
8411 alone (it will be set to zero elsewhere in the link). */
8412 if (sec != NULL)
8413 /* Add 0x10000 if sign bit in 0:15 is set.
8414 Bits 0:15 are not used. */
8415 addend += 0x8000;
8416 break;
8417
8418 case R_PPC64_ADDR16_DS:
8419 case R_PPC64_ADDR16_LO_DS:
8420 case R_PPC64_GOT16_DS:
8421 case R_PPC64_GOT16_LO_DS:
8422 case R_PPC64_PLT16_LO_DS:
8423 case R_PPC64_SECTOFF_DS:
8424 case R_PPC64_SECTOFF_LO_DS:
8425 case R_PPC64_TOC16_DS:
8426 case R_PPC64_TOC16_LO_DS:
8427 case R_PPC64_PLTGOT16_DS:
8428 case R_PPC64_PLTGOT16_LO_DS:
8429 case R_PPC64_GOT_TPREL16_DS:
8430 case R_PPC64_GOT_TPREL16_LO_DS:
8431 case R_PPC64_GOT_DTPREL16_DS:
8432 case R_PPC64_GOT_DTPREL16_LO_DS:
8433 case R_PPC64_TPREL16_DS:
8434 case R_PPC64_TPREL16_LO_DS:
8435 case R_PPC64_DTPREL16_DS:
8436 case R_PPC64_DTPREL16_LO_DS:
8437 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8438 mask = 3;
8439 /* If this reloc is against an lq insn, then the value must be
8440 a multiple of 16. This is somewhat of a hack, but the
8441 "correct" way to do this by defining _DQ forms of all the
8442 _DS relocs bloats all reloc switches in this file. It
8443 doesn't seem to make much sense to use any of these relocs
8444 in data, so testing the insn should be safe. */
8445 if ((insn & (0x3f << 26)) == (56u << 26))
8446 mask = 15;
8447 if (((relocation + addend) & mask) != 0)
8448 {
8449 (*_bfd_error_handler)
8450 (_("%s: error: relocation %s not a multiple of %d"),
8451 bfd_archive_filename (input_bfd),
8452 ppc64_elf_howto_table[r_type]->name,
8453 mask + 1);
8454 bfd_set_error (bfd_error_bad_value);
8455 ret = FALSE;
8456 continue;
8457 }
8458 break;
8459
8460 case R_PPC64_REL14:
8461 case R_PPC64_REL14_BRNTAKEN:
8462 case R_PPC64_REL14_BRTAKEN:
8463 max_br_offset = 1 << 15;
8464 goto branch_check;
8465
8466 case R_PPC64_REL24:
8467 max_br_offset = 1 << 25;
8468
8469 branch_check:
8470 /* If the branch is out of reach or the TOC register needs
8471 adjusting, then redirect the call to the local stub for
8472 this function. */
8473 from = (rel->r_offset
8474 + input_section->output_offset
8475 + input_section->output_section->vma);
8476 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8477 || (sec != NULL
8478 && sec->output_section != NULL
8479 && sec->id <= htab->top_id
8480 && (htab->stub_group[sec->id].toc_off
8481 != htab->stub_group[input_section->id].toc_off)))
8482 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8483 rel, htab)) != NULL)
8484 {
8485 /* Munge up the value and addend so that we call the stub
8486 rather than the procedure directly. */
8487 relocation = (stub_entry->stub_offset
8488 + stub_entry->stub_sec->output_offset
8489 + stub_entry->stub_sec->output_section->vma);
8490 addend = 0;
8491 }
8492 break;
8493 }
8494
8495 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8496 because such sections are not SEC_ALLOC and thus ld.so will
8497 not process them. */
8498 if (unresolved_reloc
8499 && !((input_section->flags & SEC_DEBUGGING) != 0
8500 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8501 {
8502 (*_bfd_error_handler)
8503 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8504 bfd_archive_filename (input_bfd),
8505 bfd_get_section_name (input_bfd, input_section),
8506 (long) rel->r_offset,
8507 ppc64_elf_howto_table[(int) r_type]->name,
8508 h->root.root.string);
8509 ret = FALSE;
8510 }
8511
8512 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8513 input_bfd,
8514 input_section,
8515 contents,
8516 rel->r_offset,
8517 relocation,
8518 addend);
8519
8520 if (r != bfd_reloc_ok)
8521 {
8522 if (sym_name == NULL)
8523 sym_name = "(null)";
8524 if (r == bfd_reloc_overflow)
8525 {
8526 if (warned)
8527 continue;
8528 if (h != NULL
8529 && h->root.type == bfd_link_hash_undefweak
8530 && ppc64_elf_howto_table[r_type]->pc_relative)
8531 {
8532 /* Assume this is a call protected by other code that
8533 detects the symbol is undefined. If this is the case,
8534 we can safely ignore the overflow. If not, the
8535 program is hosed anyway, and a little warning isn't
8536 going to help. */
8537
8538 continue;
8539 }
8540
8541 if (!((*info->callbacks->reloc_overflow)
8542 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8543 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8544 return FALSE;
8545 }
8546 else
8547 {
8548 (*_bfd_error_handler)
8549 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8550 bfd_archive_filename (input_bfd),
8551 bfd_get_section_name (input_bfd, input_section),
8552 (long) rel->r_offset,
8553 ppc64_elf_howto_table[r_type]->name,
8554 sym_name,
8555 (int) r);
8556 ret = FALSE;
8557 }
8558 }
8559 }
8560
8561 return ret;
8562 }
8563
8564 /* Finish up dynamic symbol handling. We set the contents of various
8565 dynamic sections here. */
8566
8567 static bfd_boolean
8568 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8569 struct bfd_link_info *info,
8570 struct elf_link_hash_entry *h,
8571 Elf_Internal_Sym *sym)
8572 {
8573 struct ppc_link_hash_table *htab;
8574 bfd *dynobj;
8575
8576 htab = ppc_hash_table (info);
8577 dynobj = htab->elf.dynobj;
8578
8579 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8580 {
8581 struct plt_entry *ent;
8582 Elf_Internal_Rela rela;
8583 bfd_byte *loc;
8584
8585 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8586 if (ent->plt.offset != (bfd_vma) -1)
8587 {
8588 /* This symbol has an entry in the procedure linkage
8589 table. Set it up. */
8590
8591 if (htab->plt == NULL
8592 || htab->relplt == NULL
8593 || htab->glink == NULL)
8594 abort ();
8595
8596 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8597 fill in the PLT entry. */
8598 rela.r_offset = (htab->plt->output_section->vma
8599 + htab->plt->output_offset
8600 + ent->plt.offset);
8601 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8602 rela.r_addend = ent->addend;
8603
8604 loc = htab->relplt->contents;
8605 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8606 * sizeof (Elf64_External_Rela));
8607 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8608 }
8609 }
8610
8611 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8612 {
8613 Elf_Internal_Rela rela;
8614 bfd_byte *loc;
8615
8616 /* This symbol needs a copy reloc. Set it up. */
8617
8618 if (h->dynindx == -1
8619 || (h->root.type != bfd_link_hash_defined
8620 && h->root.type != bfd_link_hash_defweak)
8621 || htab->relbss == NULL)
8622 abort ();
8623
8624 rela.r_offset = (h->root.u.def.value
8625 + h->root.u.def.section->output_section->vma
8626 + h->root.u.def.section->output_offset);
8627 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8628 rela.r_addend = 0;
8629 loc = htab->relbss->contents;
8630 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8631 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8632 }
8633
8634 /* Mark some specially defined symbols as absolute. */
8635 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8636 sym->st_shndx = SHN_ABS;
8637
8638 return TRUE;
8639 }
8640
8641 /* Used to decide how to sort relocs in an optimal manner for the
8642 dynamic linker, before writing them out. */
8643
8644 static enum elf_reloc_type_class
8645 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8646 {
8647 enum elf_ppc64_reloc_type r_type;
8648
8649 r_type = ELF64_R_TYPE (rela->r_info);
8650 switch (r_type)
8651 {
8652 case R_PPC64_RELATIVE:
8653 return reloc_class_relative;
8654 case R_PPC64_JMP_SLOT:
8655 return reloc_class_plt;
8656 case R_PPC64_COPY:
8657 return reloc_class_copy;
8658 default:
8659 return reloc_class_normal;
8660 }
8661 }
8662
8663 /* Finish up the dynamic sections. */
8664
8665 static bfd_boolean
8666 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8667 struct bfd_link_info *info)
8668 {
8669 struct ppc_link_hash_table *htab;
8670 bfd *dynobj;
8671 asection *sdyn;
8672
8673 htab = ppc_hash_table (info);
8674 dynobj = htab->elf.dynobj;
8675 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8676
8677 if (htab->elf.dynamic_sections_created)
8678 {
8679 Elf64_External_Dyn *dyncon, *dynconend;
8680
8681 if (sdyn == NULL || htab->got == NULL)
8682 abort ();
8683
8684 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8685 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8686 for (; dyncon < dynconend; dyncon++)
8687 {
8688 Elf_Internal_Dyn dyn;
8689 asection *s;
8690
8691 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8692
8693 switch (dyn.d_tag)
8694 {
8695 default:
8696 continue;
8697
8698 case DT_PPC64_GLINK:
8699 s = htab->glink;
8700 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8701 /* We stupidly defined DT_PPC64_GLINK to be the start
8702 of glink rather than the first entry point, which is
8703 what ld.so needs, and now have a bigger stub to
8704 support automatic multiple TOCs. */
8705 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8706 break;
8707
8708 case DT_PPC64_OPD:
8709 s = bfd_get_section_by_name (output_bfd, ".opd");
8710 if (s == NULL)
8711 continue;
8712 dyn.d_un.d_ptr = s->vma;
8713 break;
8714
8715 case DT_PPC64_OPDSZ:
8716 s = bfd_get_section_by_name (output_bfd, ".opd");
8717 if (s == NULL)
8718 continue;
8719 dyn.d_un.d_val = s->_raw_size;
8720 break;
8721
8722 case DT_PLTGOT:
8723 s = htab->plt;
8724 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8725 break;
8726
8727 case DT_JMPREL:
8728 s = htab->relplt;
8729 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8730 break;
8731
8732 case DT_PLTRELSZ:
8733 dyn.d_un.d_val = htab->relplt->_raw_size;
8734 break;
8735
8736 case DT_RELASZ:
8737 /* Don't count procedure linkage table relocs in the
8738 overall reloc count. */
8739 s = htab->relplt;
8740 if (s == NULL)
8741 continue;
8742 dyn.d_un.d_val -= s->_raw_size;
8743 break;
8744
8745 case DT_RELA:
8746 /* We may not be using the standard ELF linker script.
8747 If .rela.plt is the first .rela section, we adjust
8748 DT_RELA to not include it. */
8749 s = htab->relplt;
8750 if (s == NULL)
8751 continue;
8752 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8753 continue;
8754 dyn.d_un.d_ptr += s->_raw_size;
8755 break;
8756 }
8757
8758 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8759 }
8760 }
8761
8762 if (htab->got != NULL && htab->got->_raw_size != 0)
8763 {
8764 /* Fill in the first entry in the global offset table.
8765 We use it to hold the link-time TOCbase. */
8766 bfd_put_64 (output_bfd,
8767 elf_gp (output_bfd) + TOC_BASE_OFF,
8768 htab->got->contents);
8769
8770 /* Set .got entry size. */
8771 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8772 }
8773
8774 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8775 {
8776 /* Set .plt entry size. */
8777 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8778 = PLT_ENTRY_SIZE;
8779 }
8780
8781 /* We need to handle writing out multiple GOT sections ourselves,
8782 since we didn't add them to DYNOBJ. */
8783 while ((dynobj = dynobj->link_next) != NULL)
8784 {
8785 asection *s;
8786 s = ppc64_elf_tdata (dynobj)->got;
8787 if (s != NULL
8788 && s->_raw_size != 0
8789 && s->output_section != bfd_abs_section_ptr
8790 && !bfd_set_section_contents (output_bfd, s->output_section,
8791 s->contents, s->output_offset,
8792 s->_raw_size))
8793 return FALSE;
8794 s = ppc64_elf_tdata (dynobj)->relgot;
8795 if (s != NULL
8796 && s->_raw_size != 0
8797 && s->output_section != bfd_abs_section_ptr
8798 && !bfd_set_section_contents (output_bfd, s->output_section,
8799 s->contents, s->output_offset,
8800 s->_raw_size))
8801 return FALSE;
8802 }
8803
8804 return TRUE;
8805 }
8806
8807 #include "elf64-target.h"
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