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* gettext.m4: Properly quote arguments to AC_DEFUN.
[binutils.git] / bfd / elf64-ppc.c
blob820f80852e292286cd852113aa497444b0718094
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/ppc64.h"
32 #include "elf64-ppc.h"
33
34 static bfd_reloc_status_type ppc64_elf_ha_reloc
35 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
36 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_toc_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc64_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50
51
52 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
53 #define TARGET_LITTLE_NAME "elf64-powerpcle"
54 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
55 #define TARGET_BIG_NAME "elf64-powerpc"
56 #define ELF_ARCH bfd_arch_powerpc
57 #define ELF_MACHINE_CODE EM_PPC64
58 #define ELF_MAXPAGESIZE 0x10000
59 #define elf_info_to_howto ppc64_elf_info_to_howto
60
61 #define elf_backend_want_got_sym 0
62 #define elf_backend_want_plt_sym 0
63 #define elf_backend_plt_alignment 3
64 #define elf_backend_plt_not_loaded 1
65 #define elf_backend_got_symbol_offset 0
66 #define elf_backend_got_header_size 8
67 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
68 #define elf_backend_can_gc_sections 1
69 #define elf_backend_can_refcount 1
70 #define elf_backend_rela_normal 1
71
72 #define bfd_elf64_mkobject ppc64_elf_mkobject
73 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
74 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
75 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
76 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
77 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
78
79 #define elf_backend_object_p ppc64_elf_object_p
80 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
81 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
82 #define elf_backend_check_relocs ppc64_elf_check_relocs
83 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
84 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
85 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
86 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
87 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
88 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
89 #define elf_backend_relocate_section ppc64_elf_relocate_section
90 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
91 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
92 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
93 #define elf_backend_special_sections ppc64_elf_special_sections
94
95 /* The name of the dynamic interpreter. This is put in the .interp
96 section. */
97 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
98
99 /* The size in bytes of an entry in the procedure linkage table. */
100 #define PLT_ENTRY_SIZE 24
101
102 /* The initial size of the plt reserved for the dynamic linker. */
103 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
104
105 /* TOC base pointers offset from start of TOC. */
106 #define TOC_BASE_OFF 0x8000
107
108 /* Offset of tp and dtp pointers from start of TLS block. */
109 #define TP_OFFSET 0x7000
110 #define DTP_OFFSET 0x8000
111
112 /* .plt call stub instructions. The normal stub is like this, but
113 sometimes the .plt entry crosses a 64k boundary and we need to
114 insert an addis to adjust r12. */
115 #define PLT_CALL_STUB_SIZE (7*4)
116 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
117 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
118 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
119 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
120 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
121 /* ld %r11,xxx+16@l(%r12) */
122 #define BCTR 0x4e800420 /* bctr */
123
124
125 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
126 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
127
128 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
129
130 /* glink call stub instructions. We enter with the index in R0, and the
131 address of glink entry in CTR. From that, we can calculate PLT0. */
132 #define GLINK_CALL_STUB_SIZE (16*4)
133 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
134 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
135 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
136 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
137 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
138 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
139 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
140 /* sub %r12,%r12,%r11 */
141 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
142 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
143 /* ld %r11,xxx@l(%r12) */
144 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
145 /* ld %r2,8(%r12) */
146 /* mtctr %r11 */
147 /* ld %r11,16(%r12) */
148 /* bctr */
149
150 /* Pad with this. */
151 #define NOP 0x60000000
152
153 /* Some other nops. */
154 #define CROR_151515 0x4def7b82
155 #define CROR_313131 0x4ffffb82
156
157 /* .glink entries for the first 32k functions are two instructions. */
158 #define LI_R0_0 0x38000000 /* li %r0,0 */
159 #define B_DOT 0x48000000 /* b . */
160
161 /* After that, we need two instructions to load the index, followed by
162 a branch. */
163 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
164 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
165
166 /* Instructions to save and restore floating point regs. */
167 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
168 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
169 #define BLR 0x4e800020 /* blr */
170
171 /* Since .opd is an array of descriptors and each entry will end up
172 with identical R_PPC64_RELATIVE relocs, there is really no need to
173 propagate .opd relocs; The dynamic linker should be taught to
174 relocate .opd without reloc entries. */
175 #ifndef NO_OPD_RELOCS
176 #define NO_OPD_RELOCS 0
177 #endif
178 \f
179 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
180
181 /* Relocation HOWTO's. */
182 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
183
184 static reloc_howto_type ppc64_elf_howto_raw[] = {
185 /* This reloc does nothing. */
186 HOWTO (R_PPC64_NONE, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_dont, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC64_NONE", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* A standard 32 bit relocation. */
201 HOWTO (R_PPC64_ADDR32, /* type */
202 0, /* rightshift */
203 2, /* size (0 = byte, 1 = short, 2 = long) */
204 32, /* bitsize */
205 FALSE, /* pc_relative */
206 0, /* bitpos */
207 complain_overflow_bitfield, /* complain_on_overflow */
208 bfd_elf_generic_reloc, /* special_function */
209 "R_PPC64_ADDR32", /* name */
210 FALSE, /* partial_inplace */
211 0, /* src_mask */
212 0xffffffff, /* dst_mask */
213 FALSE), /* pcrel_offset */
214
215 /* An absolute 26 bit branch; the lower two bits must be zero.
216 FIXME: we don't check that, we just clear them. */
217 HOWTO (R_PPC64_ADDR24, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 26, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC64_ADDR24", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0x03fffffc, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A standard 16 bit relocation. */
232 HOWTO (R_PPC64_ADDR16, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC64_ADDR16", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* A 16 bit relocation without overflow. */
247 HOWTO (R_PPC64_ADDR16_LO, /* type */
248 0, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont,/* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC64_ADDR16_LO", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* Bits 16-31 of an address. */
262 HOWTO (R_PPC64_ADDR16_HI, /* type */
263 16, /* rightshift */
264 1, /* size (0 = byte, 1 = short, 2 = long) */
265 16, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_PPC64_ADDR16_HI", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0xffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
277 bits, treated as a signed number, is negative. */
278 HOWTO (R_PPC64_ADDR16_HA, /* type */
279 16, /* rightshift */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont, /* complain_on_overflow */
285 ppc64_elf_ha_reloc, /* special_function */
286 "R_PPC64_ADDR16_HA", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* An absolute 16 bit branch; the lower two bits must be zero.
293 FIXME: we don't check that, we just clear them. */
294 HOWTO (R_PPC64_ADDR14, /* type */
295 0, /* rightshift */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_bitfield, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_PPC64_ADDR14", /* name */
303 FALSE, /* partial_inplace */
304 0, /* src_mask */
305 0x0000fffc, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* An absolute 16 bit branch, for which bit 10 should be set to
309 indicate that the branch is expected to be taken. The lower two
310 bits must be zero. */
311 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
312 0, /* rightshift */
313 2, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_bitfield, /* complain_on_overflow */
318 ppc64_elf_brtaken_reloc, /* special_function */
319 "R_PPC64_ADDR14_BRTAKEN",/* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0x0000fffc, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch, for which bit 10 should be set to
326 indicate that the branch is not expected to be taken. The lower
327 two bits must be zero. */
328 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 16, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 ppc64_elf_brtaken_reloc, /* special_function */
336 "R_PPC64_ADDR14_BRNTAKEN",/* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x0000fffc, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 /* A relative 26 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC64_REL24, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 26, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC64_REL24", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0x03fffffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch; the lower two bits must be zero. */
358 HOWTO (R_PPC64_REL14, /* type */
359 0, /* rightshift */
360 2, /* size (0 = byte, 1 = short, 2 = long) */
361 16, /* bitsize */
362 TRUE, /* pc_relative */
363 0, /* bitpos */
364 complain_overflow_signed, /* complain_on_overflow */
365 bfd_elf_generic_reloc, /* special_function */
366 "R_PPC64_REL14", /* name */
367 FALSE, /* partial_inplace */
368 0, /* src_mask */
369 0x0000fffc, /* dst_mask */
370 TRUE), /* pcrel_offset */
371
372 /* A relative 16 bit branch. Bit 10 should be set to indicate that
373 the branch is expected to be taken. The lower two bits must be
374 zero. */
375 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 16, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 ppc64_elf_brtaken_reloc, /* special_function */
383 "R_PPC64_REL14_BRTAKEN", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x0000fffc, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 /* A relative 16 bit branch. Bit 10 should be set to indicate that
390 the branch is not expected to be taken. The lower two bits must
391 be zero. */
392 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
393 0, /* rightshift */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
395 16, /* bitsize */
396 TRUE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_signed, /* complain_on_overflow */
399 ppc64_elf_brtaken_reloc, /* special_function */
400 "R_PPC64_REL14_BRNTAKEN",/* name */
401 FALSE, /* partial_inplace */
402 0, /* src_mask */
403 0x0000fffc, /* dst_mask */
404 TRUE), /* pcrel_offset */
405
406 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
407 symbol. */
408 HOWTO (R_PPC64_GOT16, /* type */
409 0, /* rightshift */
410 1, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_unhandled_reloc, /* special_function */
416 "R_PPC64_GOT16", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0xffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
423 the symbol. */
424 HOWTO (R_PPC64_GOT16_LO, /* type */
425 0, /* rightshift */
426 1, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 FALSE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_dont, /* complain_on_overflow */
431 ppc64_elf_unhandled_reloc, /* special_function */
432 "R_PPC64_GOT16_LO", /* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0xffff, /* dst_mask */
436 FALSE), /* pcrel_offset */
437
438 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
439 the symbol. */
440 HOWTO (R_PPC64_GOT16_HI, /* type */
441 16, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_dont,/* complain_on_overflow */
447 ppc64_elf_unhandled_reloc, /* special_function */
448 "R_PPC64_GOT16_HI", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
455 the symbol. */
456 HOWTO (R_PPC64_GOT16_HA, /* type */
457 16, /* rightshift */
458 1, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont,/* complain_on_overflow */
463 ppc64_elf_unhandled_reloc, /* special_function */
464 "R_PPC64_GOT16_HA", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* This is used only by the dynamic linker. The symbol should exist
471 both in the object being run and in some shared library. The
472 dynamic linker copies the data addressed by the symbol from the
473 shared library into the object, because the object being
474 run has to have the data at some particular address. */
475 HOWTO (R_PPC64_COPY, /* type */
476 0, /* rightshift */
477 0, /* this one is variable size */
478 0, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont, /* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_COPY", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR64, but used when setting global offset table
490 entries. */
491 HOWTO (R_PPC64_GLOB_DAT, /* type */
492 0, /* rightshift */
493 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
494 64, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_dont, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GLOB_DAT", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 ONES (64), /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Created by the link editor. Marks a procedure linkage table
506 entry for a symbol. */
507 HOWTO (R_PPC64_JMP_SLOT, /* type */
508 0, /* rightshift */
509 0, /* size (0 = byte, 1 = short, 2 = long) */
510 0, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 doubleword64 is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC64_RELATIVE, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC64_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC64_ADDR32, but may be unaligned. */
539 HOWTO (R_PPC64_UADDR32, /* type */
540 0, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 32, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_bitfield, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_PPC64_UADDR32", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffffffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Like R_PPC64_ADDR16, but may be unaligned. */
554 HOWTO (R_PPC64_UADDR16, /* type */
555 0, /* rightshift */
556 1, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 0, /* bitpos */
560 complain_overflow_bitfield, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_PPC64_UADDR16", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0xffff, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 /* 32-bit PC relative. */
569 HOWTO (R_PPC64_REL32, /* type */
570 0, /* rightshift */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
572 32, /* bitsize */
573 TRUE, /* pc_relative */
574 0, /* bitpos */
575 /* FIXME: Verify. Was complain_overflow_bitfield. */
576 complain_overflow_signed, /* complain_on_overflow */
577 bfd_elf_generic_reloc, /* special_function */
578 "R_PPC64_REL32", /* name */
579 FALSE, /* partial_inplace */
580 0, /* src_mask */
581 0xffffffff, /* dst_mask */
582 TRUE), /* pcrel_offset */
583
584 /* 32-bit relocation to the symbol's procedure linkage table. */
585 HOWTO (R_PPC64_PLT32, /* type */
586 0, /* rightshift */
587 2, /* size (0 = byte, 1 = short, 2 = long) */
588 32, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_bitfield, /* complain_on_overflow */
592 ppc64_elf_unhandled_reloc, /* special_function */
593 "R_PPC64_PLT32", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 0xffffffff, /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
600 FIXME: R_PPC64_PLTREL32 not supported. */
601 HOWTO (R_PPC64_PLTREL32, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 32, /* bitsize */
605 TRUE, /* pc_relative */
606 0, /* bitpos */
607 complain_overflow_signed, /* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_PPC64_PLTREL32", /* name */
610 FALSE, /* partial_inplace */
611 0, /* src_mask */
612 0xffffffff, /* dst_mask */
613 TRUE), /* pcrel_offset */
614
615 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
616 the symbol. */
617 HOWTO (R_PPC64_PLT16_LO, /* type */
618 0, /* rightshift */
619 1, /* size (0 = byte, 1 = short, 2 = long) */
620 16, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_dont, /* complain_on_overflow */
624 ppc64_elf_unhandled_reloc, /* special_function */
625 "R_PPC64_PLT16_LO", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
632 the symbol. */
633 HOWTO (R_PPC64_PLT16_HI, /* type */
634 16, /* rightshift */
635 1, /* size (0 = byte, 1 = short, 2 = long) */
636 16, /* bitsize */
637 FALSE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_dont, /* complain_on_overflow */
640 ppc64_elf_unhandled_reloc, /* special_function */
641 "R_PPC64_PLT16_HI", /* name */
642 FALSE, /* partial_inplace */
643 0, /* src_mask */
644 0xffff, /* dst_mask */
645 FALSE), /* pcrel_offset */
646
647 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
648 the symbol. */
649 HOWTO (R_PPC64_PLT16_HA, /* type */
650 16, /* rightshift */
651 1, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 FALSE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_dont, /* complain_on_overflow */
656 ppc64_elf_unhandled_reloc, /* special_function */
657 "R_PPC64_PLT16_HA", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 0xffff, /* dst_mask */
661 FALSE), /* pcrel_offset */
662
663 /* 16-bit section relative relocation. */
664 HOWTO (R_PPC64_SECTOFF, /* type */
665 0, /* rightshift */
666 1, /* size (0 = byte, 1 = short, 2 = long) */
667 16, /* bitsize */
668 FALSE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_bitfield, /* complain_on_overflow */
671 ppc64_elf_sectoff_reloc, /* special_function */
672 "R_PPC64_SECTOFF", /* name */
673 FALSE, /* partial_inplace */
674 0, /* src_mask */
675 0xffff, /* dst_mask */
676 FALSE), /* pcrel_offset */
677
678 /* Like R_PPC64_SECTOFF, but no overflow warning. */
679 HOWTO (R_PPC64_SECTOFF_LO, /* type */
680 0, /* rightshift */
681 1, /* size (0 = byte, 1 = short, 2 = long) */
682 16, /* bitsize */
683 FALSE, /* pc_relative */
684 0, /* bitpos */
685 complain_overflow_dont, /* complain_on_overflow */
686 ppc64_elf_sectoff_reloc, /* special_function */
687 "R_PPC64_SECTOFF_LO", /* name */
688 FALSE, /* partial_inplace */
689 0, /* src_mask */
690 0xffff, /* dst_mask */
691 FALSE), /* pcrel_offset */
692
693 /* 16-bit upper half section relative relocation. */
694 HOWTO (R_PPC64_SECTOFF_HI, /* type */
695 16, /* rightshift */
696 1, /* size (0 = byte, 1 = short, 2 = long) */
697 16, /* bitsize */
698 FALSE, /* pc_relative */
699 0, /* bitpos */
700 complain_overflow_dont, /* complain_on_overflow */
701 ppc64_elf_sectoff_reloc, /* special_function */
702 "R_PPC64_SECTOFF_HI", /* name */
703 FALSE, /* partial_inplace */
704 0, /* src_mask */
705 0xffff, /* dst_mask */
706 FALSE), /* pcrel_offset */
707
708 /* 16-bit upper half adjusted section relative relocation. */
709 HOWTO (R_PPC64_SECTOFF_HA, /* type */
710 16, /* rightshift */
711 1, /* size (0 = byte, 1 = short, 2 = long) */
712 16, /* bitsize */
713 FALSE, /* pc_relative */
714 0, /* bitpos */
715 complain_overflow_dont, /* complain_on_overflow */
716 ppc64_elf_sectoff_ha_reloc, /* special_function */
717 "R_PPC64_SECTOFF_HA", /* name */
718 FALSE, /* partial_inplace */
719 0, /* src_mask */
720 0xffff, /* dst_mask */
721 FALSE), /* pcrel_offset */
722
723 /* Like R_PPC64_REL24 without touching the two least significant bits. */
724 HOWTO (R_PPC64_REL30, /* type */
725 2, /* rightshift */
726 2, /* size (0 = byte, 1 = short, 2 = long) */
727 30, /* bitsize */
728 TRUE, /* pc_relative */
729 0, /* bitpos */
730 complain_overflow_dont, /* complain_on_overflow */
731 bfd_elf_generic_reloc, /* special_function */
732 "R_PPC64_REL30", /* name */
733 FALSE, /* partial_inplace */
734 0, /* src_mask */
735 0xfffffffc, /* dst_mask */
736 TRUE), /* pcrel_offset */
737
738 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
739
740 /* A standard 64-bit relocation. */
741 HOWTO (R_PPC64_ADDR64, /* type */
742 0, /* rightshift */
743 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
744 64, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont, /* complain_on_overflow */
748 bfd_elf_generic_reloc, /* special_function */
749 "R_PPC64_ADDR64", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 ONES (64), /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* The bits 32-47 of an address. */
756 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
757 32, /* rightshift */
758 1, /* size (0 = byte, 1 = short, 2 = long) */
759 16, /* bitsize */
760 FALSE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_PPC64_ADDR16_HIGHER", /* name */
765 FALSE, /* partial_inplace */
766 0, /* src_mask */
767 0xffff, /* dst_mask */
768 FALSE), /* pcrel_offset */
769
770 /* The bits 32-47 of an address, plus 1 if the contents of the low
771 16 bits, treated as a signed number, is negative. */
772 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
773 32, /* rightshift */
774 1, /* size (0 = byte, 1 = short, 2 = long) */
775 16, /* bitsize */
776 FALSE, /* pc_relative */
777 0, /* bitpos */
778 complain_overflow_dont, /* complain_on_overflow */
779 ppc64_elf_ha_reloc, /* special_function */
780 "R_PPC64_ADDR16_HIGHERA", /* name */
781 FALSE, /* partial_inplace */
782 0, /* src_mask */
783 0xffff, /* dst_mask */
784 FALSE), /* pcrel_offset */
785
786 /* The bits 48-63 of an address. */
787 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
788 48, /* rightshift */
789 1, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC64_ADDR16_HIGHEST", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0xffff, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 /* The bits 48-63 of an address, plus 1 if the contents of the low
802 16 bits, treated as a signed number, is negative. */
803 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
804 48, /* rightshift */
805 1, /* size (0 = byte, 1 = short, 2 = long) */
806 16, /* bitsize */
807 FALSE, /* pc_relative */
808 0, /* bitpos */
809 complain_overflow_dont, /* complain_on_overflow */
810 ppc64_elf_ha_reloc, /* special_function */
811 "R_PPC64_ADDR16_HIGHESTA", /* name */
812 FALSE, /* partial_inplace */
813 0, /* src_mask */
814 0xffff, /* dst_mask */
815 FALSE), /* pcrel_offset */
816
817 /* Like ADDR64, but may be unaligned. */
818 HOWTO (R_PPC64_UADDR64, /* type */
819 0, /* rightshift */
820 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
821 64, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 bfd_elf_generic_reloc, /* special_function */
826 "R_PPC64_UADDR64", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 ONES (64), /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* 64-bit relative relocation. */
833 HOWTO (R_PPC64_REL64, /* type */
834 0, /* rightshift */
835 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
836 64, /* bitsize */
837 TRUE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_dont, /* complain_on_overflow */
840 bfd_elf_generic_reloc, /* special_function */
841 "R_PPC64_REL64", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 ONES (64), /* dst_mask */
845 TRUE), /* pcrel_offset */
846
847 /* 64-bit relocation to the symbol's procedure linkage table. */
848 HOWTO (R_PPC64_PLT64, /* type */
849 0, /* rightshift */
850 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
851 64, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 ppc64_elf_unhandled_reloc, /* special_function */
856 "R_PPC64_PLT64", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 ONES (64), /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* 64-bit PC relative relocation to the symbol's procedure linkage
863 table. */
864 /* FIXME: R_PPC64_PLTREL64 not supported. */
865 HOWTO (R_PPC64_PLTREL64, /* type */
866 0, /* rightshift */
867 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
868 64, /* bitsize */
869 TRUE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc64_elf_unhandled_reloc, /* special_function */
873 "R_PPC64_PLTREL64", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 ONES (64), /* dst_mask */
877 TRUE), /* pcrel_offset */
878
879 /* 16 bit TOC-relative relocation. */
880
881 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
882 HOWTO (R_PPC64_TOC16, /* type */
883 0, /* rightshift */
884 1, /* size (0 = byte, 1 = short, 2 = long) */
885 16, /* bitsize */
886 FALSE, /* pc_relative */
887 0, /* bitpos */
888 complain_overflow_signed, /* complain_on_overflow */
889 ppc64_elf_toc_reloc, /* special_function */
890 "R_PPC64_TOC16", /* name */
891 FALSE, /* partial_inplace */
892 0, /* src_mask */
893 0xffff, /* dst_mask */
894 FALSE), /* pcrel_offset */
895
896 /* 16 bit TOC-relative relocation without overflow. */
897
898 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
899 HOWTO (R_PPC64_TOC16_LO, /* type */
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc64_elf_toc_reloc, /* special_function */
907 "R_PPC64_TOC16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* 16 bit TOC-relative relocation, high 16 bits. */
914
915 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
916 HOWTO (R_PPC64_TOC16_HI, /* type */
917 16, /* rightshift */
918 1, /* size (0 = byte, 1 = short, 2 = long) */
919 16, /* bitsize */
920 FALSE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_dont, /* complain_on_overflow */
923 ppc64_elf_toc_reloc, /* special_function */
924 "R_PPC64_TOC16_HI", /* name */
925 FALSE, /* partial_inplace */
926 0, /* src_mask */
927 0xffff, /* dst_mask */
928 FALSE), /* pcrel_offset */
929
930 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
931 contents of the low 16 bits, treated as a signed number, is
932 negative. */
933
934 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HA, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_ha_reloc, /* special_function */
943 "R_PPC64_TOC16_HA", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit relocation; insert value of TOC base (.TOC.). */
950
951 /* R_PPC64_TOC 51 doubleword64 .TOC. */
952 HOWTO (R_PPC64_TOC, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_bitfield, /* complain_on_overflow */
959 ppc64_elf_toc64_reloc, /* special_function */
960 "R_PPC64_TOC", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Like R_PPC64_GOT16, but also informs the link editor that the
967 value to relocate may (!) refer to a PLT entry which the link
968 editor (a) may replace with the symbol value. If the link editor
969 is unable to fully resolve the symbol, it may (b) create a PLT
970 entry and store the address to the new PLT entry in the GOT.
971 This permits lazy resolution of function symbols at run time.
972 The link editor may also skip all of this and just (c) emit a
973 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
974 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
975 HOWTO (R_PPC64_PLTGOT16, /* type */
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_signed, /* complain_on_overflow */
982 ppc64_elf_unhandled_reloc, /* special_function */
983 "R_PPC64_PLTGOT16", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like R_PPC64_PLTGOT16, but without overflow. */
990 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
991 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
992 0, /* rightshift */
993 1, /* size (0 = byte, 1 = short, 2 = long) */
994 16, /* bitsize */
995 FALSE, /* pc_relative */
996 0, /* bitpos */
997 complain_overflow_dont, /* complain_on_overflow */
998 ppc64_elf_unhandled_reloc, /* special_function */
999 "R_PPC64_PLTGOT16_LO", /* name */
1000 FALSE, /* partial_inplace */
1001 0, /* src_mask */
1002 0xffff, /* dst_mask */
1003 FALSE), /* pcrel_offset */
1004
1005 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1006 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1007 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_dont, /* complain_on_overflow */
1014 ppc64_elf_unhandled_reloc, /* special_function */
1015 "R_PPC64_PLTGOT16_HI", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1022 1 if the contents of the low 16 bits, treated as a signed number,
1023 is negative. */
1024 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1026 16, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont,/* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_HA", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1040 HOWTO (R_PPC64_ADDR16_DS, /* type */
1041 0, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_bitfield, /* complain_on_overflow */
1047 bfd_elf_generic_reloc, /* special_function */
1048 "R_PPC64_ADDR16_DS", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xfffc, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1055 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1056 0, /* rightshift */
1057 1, /* size (0 = byte, 1 = short, 2 = long) */
1058 16, /* bitsize */
1059 FALSE, /* pc_relative */
1060 0, /* bitpos */
1061 complain_overflow_dont,/* complain_on_overflow */
1062 bfd_elf_generic_reloc, /* special_function */
1063 "R_PPC64_ADDR16_LO_DS",/* name */
1064 FALSE, /* partial_inplace */
1065 0, /* src_mask */
1066 0xfffc, /* dst_mask */
1067 FALSE), /* pcrel_offset */
1068
1069 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1070 HOWTO (R_PPC64_GOT16_DS, /* type */
1071 0, /* rightshift */
1072 1, /* size (0 = byte, 1 = short, 2 = long) */
1073 16, /* bitsize */
1074 FALSE, /* pc_relative */
1075 0, /* bitpos */
1076 complain_overflow_signed, /* complain_on_overflow */
1077 ppc64_elf_unhandled_reloc, /* special_function */
1078 "R_PPC64_GOT16_DS", /* name */
1079 FALSE, /* partial_inplace */
1080 0, /* src_mask */
1081 0xfffc, /* dst_mask */
1082 FALSE), /* pcrel_offset */
1083
1084 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1085 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1086 0, /* rightshift */
1087 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 16, /* bitsize */
1089 FALSE, /* pc_relative */
1090 0, /* bitpos */
1091 complain_overflow_dont, /* complain_on_overflow */
1092 ppc64_elf_unhandled_reloc, /* special_function */
1093 "R_PPC64_GOT16_LO_DS", /* name */
1094 FALSE, /* partial_inplace */
1095 0, /* src_mask */
1096 0xfffc, /* dst_mask */
1097 FALSE), /* pcrel_offset */
1098
1099 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1100 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1101 0, /* rightshift */
1102 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 16, /* bitsize */
1104 FALSE, /* pc_relative */
1105 0, /* bitpos */
1106 complain_overflow_dont, /* complain_on_overflow */
1107 ppc64_elf_unhandled_reloc, /* special_function */
1108 "R_PPC64_PLT16_LO_DS", /* name */
1109 FALSE, /* partial_inplace */
1110 0, /* src_mask */
1111 0xfffc, /* dst_mask */
1112 FALSE), /* pcrel_offset */
1113
1114 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1115 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1116 0, /* rightshift */
1117 1, /* size (0 = byte, 1 = short, 2 = long) */
1118 16, /* bitsize */
1119 FALSE, /* pc_relative */
1120 0, /* bitpos */
1121 complain_overflow_bitfield, /* complain_on_overflow */
1122 ppc64_elf_sectoff_reloc, /* special_function */
1123 "R_PPC64_SECTOFF_DS", /* name */
1124 FALSE, /* partial_inplace */
1125 0, /* src_mask */
1126 0xfffc, /* dst_mask */
1127 FALSE), /* pcrel_offset */
1128
1129 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1130 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1131 0, /* rightshift */
1132 1, /* size (0 = byte, 1 = short, 2 = long) */
1133 16, /* bitsize */
1134 FALSE, /* pc_relative */
1135 0, /* bitpos */
1136 complain_overflow_dont, /* complain_on_overflow */
1137 ppc64_elf_sectoff_reloc, /* special_function */
1138 "R_PPC64_SECTOFF_LO_DS",/* name */
1139 FALSE, /* partial_inplace */
1140 0, /* src_mask */
1141 0xfffc, /* dst_mask */
1142 FALSE), /* pcrel_offset */
1143
1144 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1145 HOWTO (R_PPC64_TOC16_DS, /* type */
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc64_elf_toc_reloc, /* special_function */
1153 "R_PPC64_TOC16_DS", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xfffc, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1160 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc64_elf_toc_reloc, /* special_function */
1168 "R_PPC64_TOC16_LO_DS", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xfffc, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1175 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1176 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_signed, /* complain_on_overflow */
1183 ppc64_elf_unhandled_reloc, /* special_function */
1184 "R_PPC64_PLTGOT16_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1191 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1192 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc64_elf_unhandled_reloc, /* special_function */
1200 "R_PPC64_PLTGOT16_LO_DS",/* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xfffc, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Marker reloc for TLS. */
1207 HOWTO (R_PPC64_TLS,
1208 0, /* rightshift */
1209 2, /* size (0 = byte, 1 = short, 2 = long) */
1210 32, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_dont, /* complain_on_overflow */
1214 bfd_elf_generic_reloc, /* special_function */
1215 "R_PPC64_TLS", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Computes the load module index of the load module that contains the
1222 definition of its TLS sym. */
1223 HOWTO (R_PPC64_DTPMOD64,
1224 0, /* rightshift */
1225 4, /* size (0 = byte, 1 = short, 2 = long) */
1226 64, /* bitsize */
1227 FALSE, /* pc_relative */
1228 0, /* bitpos */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 ppc64_elf_unhandled_reloc, /* special_function */
1231 "R_PPC64_DTPMOD64", /* name */
1232 FALSE, /* partial_inplace */
1233 0, /* src_mask */
1234 ONES (64), /* dst_mask */
1235 FALSE), /* pcrel_offset */
1236
1237 /* Computes a dtv-relative displacement, the difference between the value
1238 of sym+add and the base address of the thread-local storage block that
1239 contains the definition of sym, minus 0x8000. */
1240 HOWTO (R_PPC64_DTPREL64,
1241 0, /* rightshift */
1242 4, /* size (0 = byte, 1 = short, 2 = long) */
1243 64, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 ppc64_elf_unhandled_reloc, /* special_function */
1248 "R_PPC64_DTPREL64", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 ONES (64), /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 /* A 16 bit dtprel reloc. */
1255 HOWTO (R_PPC64_DTPREL16,
1256 0, /* rightshift */
1257 1, /* size (0 = byte, 1 = short, 2 = long) */
1258 16, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_signed, /* complain_on_overflow */
1262 ppc64_elf_unhandled_reloc, /* special_function */
1263 "R_PPC64_DTPREL16", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 0xffff, /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* Like DTPREL16, but no overflow. */
1270 HOWTO (R_PPC64_DTPREL16_LO,
1271 0, /* rightshift */
1272 1, /* size (0 = byte, 1 = short, 2 = long) */
1273 16, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont, /* complain_on_overflow */
1277 ppc64_elf_unhandled_reloc, /* special_function */
1278 "R_PPC64_DTPREL16_LO", /* name */
1279 FALSE, /* partial_inplace */
1280 0, /* src_mask */
1281 0xffff, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1285 HOWTO (R_PPC64_DTPREL16_HI,
1286 16, /* rightshift */
1287 1, /* size (0 = byte, 1 = short, 2 = long) */
1288 16, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 ppc64_elf_unhandled_reloc, /* special_function */
1293 "R_PPC64_DTPREL16_HI", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 0xffff, /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1300 HOWTO (R_PPC64_DTPREL16_HA,
1301 16, /* rightshift */
1302 1, /* size (0 = byte, 1 = short, 2 = long) */
1303 16, /* bitsize */
1304 FALSE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_dont, /* complain_on_overflow */
1307 ppc64_elf_unhandled_reloc, /* special_function */
1308 "R_PPC64_DTPREL16_HA", /* name */
1309 FALSE, /* partial_inplace */
1310 0, /* src_mask */
1311 0xffff, /* dst_mask */
1312 FALSE), /* pcrel_offset */
1313
1314 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1315 HOWTO (R_PPC64_DTPREL16_HIGHER,
1316 32, /* rightshift */
1317 1, /* size (0 = byte, 1 = short, 2 = long) */
1318 16, /* bitsize */
1319 FALSE, /* pc_relative */
1320 0, /* bitpos */
1321 complain_overflow_dont, /* complain_on_overflow */
1322 ppc64_elf_unhandled_reloc, /* special_function */
1323 "R_PPC64_DTPREL16_HIGHER", /* name */
1324 FALSE, /* partial_inplace */
1325 0, /* src_mask */
1326 0xffff, /* dst_mask */
1327 FALSE), /* pcrel_offset */
1328
1329 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1330 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1331 32, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_dont, /* complain_on_overflow */
1337 ppc64_elf_unhandled_reloc, /* special_function */
1338 "R_PPC64_DTPREL16_HIGHERA", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1345 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1346 48, /* rightshift */
1347 1, /* size (0 = byte, 1 = short, 2 = long) */
1348 16, /* bitsize */
1349 FALSE, /* pc_relative */
1350 0, /* bitpos */
1351 complain_overflow_dont, /* complain_on_overflow */
1352 ppc64_elf_unhandled_reloc, /* special_function */
1353 "R_PPC64_DTPREL16_HIGHEST", /* name */
1354 FALSE, /* partial_inplace */
1355 0, /* src_mask */
1356 0xffff, /* dst_mask */
1357 FALSE), /* pcrel_offset */
1358
1359 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1360 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1361 48, /* rightshift */
1362 1, /* size (0 = byte, 1 = short, 2 = long) */
1363 16, /* bitsize */
1364 FALSE, /* pc_relative */
1365 0, /* bitpos */
1366 complain_overflow_dont, /* complain_on_overflow */
1367 ppc64_elf_unhandled_reloc, /* special_function */
1368 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1369 FALSE, /* partial_inplace */
1370 0, /* src_mask */
1371 0xffff, /* dst_mask */
1372 FALSE), /* pcrel_offset */
1373
1374 /* Like DTPREL16, but for insns with a DS field. */
1375 HOWTO (R_PPC64_DTPREL16_DS,
1376 0, /* rightshift */
1377 1, /* size (0 = byte, 1 = short, 2 = long) */
1378 16, /* bitsize */
1379 FALSE, /* pc_relative */
1380 0, /* bitpos */
1381 complain_overflow_signed, /* complain_on_overflow */
1382 ppc64_elf_unhandled_reloc, /* special_function */
1383 "R_PPC64_DTPREL16_DS", /* name */
1384 FALSE, /* partial_inplace */
1385 0, /* src_mask */
1386 0xfffc, /* dst_mask */
1387 FALSE), /* pcrel_offset */
1388
1389 /* Like DTPREL16_DS, but no overflow. */
1390 HOWTO (R_PPC64_DTPREL16_LO_DS,
1391 0, /* rightshift */
1392 1, /* size (0 = byte, 1 = short, 2 = long) */
1393 16, /* bitsize */
1394 FALSE, /* pc_relative */
1395 0, /* bitpos */
1396 complain_overflow_dont, /* complain_on_overflow */
1397 ppc64_elf_unhandled_reloc, /* special_function */
1398 "R_PPC64_DTPREL16_LO_DS", /* name */
1399 FALSE, /* partial_inplace */
1400 0, /* src_mask */
1401 0xfffc, /* dst_mask */
1402 FALSE), /* pcrel_offset */
1403
1404 /* Computes a tp-relative displacement, the difference between the value of
1405 sym+add and the value of the thread pointer (r13). */
1406 HOWTO (R_PPC64_TPREL64,
1407 0, /* rightshift */
1408 4, /* size (0 = byte, 1 = short, 2 = long) */
1409 64, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_TPREL64", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 ONES (64), /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* A 16 bit tprel reloc. */
1421 HOWTO (R_PPC64_TPREL16,
1422 0, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_signed, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_TPREL16", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like TPREL16, but no overflow. */
1436 HOWTO (R_PPC64_TPREL16_LO,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_dont, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_TPREL16_LO", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xffff, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like TPREL16_LO, but next higher group of 16 bits. */
1451 HOWTO (R_PPC64_TPREL16_HI,
1452 16, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_TPREL16_HI", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xffff, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Like TPREL16_HI, but adjust for low 16 bits. */
1466 HOWTO (R_PPC64_TPREL16_HA,
1467 16, /* rightshift */
1468 1, /* size (0 = byte, 1 = short, 2 = long) */
1469 16, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_dont, /* complain_on_overflow */
1473 ppc64_elf_unhandled_reloc, /* special_function */
1474 "R_PPC64_TPREL16_HA", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0xffff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* Like TPREL16_HI, but next higher group of 16 bits. */
1481 HOWTO (R_PPC64_TPREL16_HIGHER,
1482 32, /* rightshift */
1483 1, /* size (0 = byte, 1 = short, 2 = long) */
1484 16, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_dont, /* complain_on_overflow */
1488 ppc64_elf_unhandled_reloc, /* special_function */
1489 "R_PPC64_TPREL16_HIGHER", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0xffff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1496 HOWTO (R_PPC64_TPREL16_HIGHERA,
1497 32, /* rightshift */
1498 1, /* size (0 = byte, 1 = short, 2 = long) */
1499 16, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_dont, /* complain_on_overflow */
1503 ppc64_elf_unhandled_reloc, /* special_function */
1504 "R_PPC64_TPREL16_HIGHERA", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0xffff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1511 HOWTO (R_PPC64_TPREL16_HIGHEST,
1512 48, /* rightshift */
1513 1, /* size (0 = byte, 1 = short, 2 = long) */
1514 16, /* bitsize */
1515 FALSE, /* pc_relative */
1516 0, /* bitpos */
1517 complain_overflow_dont, /* complain_on_overflow */
1518 ppc64_elf_unhandled_reloc, /* special_function */
1519 "R_PPC64_TPREL16_HIGHEST", /* name */
1520 FALSE, /* partial_inplace */
1521 0, /* src_mask */
1522 0xffff, /* dst_mask */
1523 FALSE), /* pcrel_offset */
1524
1525 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1526 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1527 48, /* rightshift */
1528 1, /* size (0 = byte, 1 = short, 2 = long) */
1529 16, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
1532 complain_overflow_dont, /* complain_on_overflow */
1533 ppc64_elf_unhandled_reloc, /* special_function */
1534 "R_PPC64_TPREL16_HIGHESTA", /* name */
1535 FALSE, /* partial_inplace */
1536 0, /* src_mask */
1537 0xffff, /* dst_mask */
1538 FALSE), /* pcrel_offset */
1539
1540 /* Like TPREL16, but for insns with a DS field. */
1541 HOWTO (R_PPC64_TPREL16_DS,
1542 0, /* rightshift */
1543 1, /* size (0 = byte, 1 = short, 2 = long) */
1544 16, /* bitsize */
1545 FALSE, /* pc_relative */
1546 0, /* bitpos */
1547 complain_overflow_signed, /* complain_on_overflow */
1548 ppc64_elf_unhandled_reloc, /* special_function */
1549 "R_PPC64_TPREL16_DS", /* name */
1550 FALSE, /* partial_inplace */
1551 0, /* src_mask */
1552 0xfffc, /* dst_mask */
1553 FALSE), /* pcrel_offset */
1554
1555 /* Like TPREL16_DS, but no overflow. */
1556 HOWTO (R_PPC64_TPREL16_LO_DS,
1557 0, /* rightshift */
1558 1, /* size (0 = byte, 1 = short, 2 = long) */
1559 16, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_dont, /* complain_on_overflow */
1563 ppc64_elf_unhandled_reloc, /* special_function */
1564 "R_PPC64_TPREL16_LO_DS", /* name */
1565 FALSE, /* partial_inplace */
1566 0, /* src_mask */
1567 0xfffc, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1571 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1572 to the first entry relative to the TOC base (r2). */
1573 HOWTO (R_PPC64_GOT_TLSGD16,
1574 0, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_signed, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_GOT_TLSGD16", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xffff, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like GOT_TLSGD16, but no overflow. */
1588 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1589 0, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_GOT_TLSGD16_LO", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1603 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1604 16, /* rightshift */
1605 1, /* size (0 = byte, 1 = short, 2 = long) */
1606 16, /* bitsize */
1607 FALSE, /* pc_relative */
1608 0, /* bitpos */
1609 complain_overflow_dont, /* complain_on_overflow */
1610 ppc64_elf_unhandled_reloc, /* special_function */
1611 "R_PPC64_GOT_TLSGD16_HI", /* name */
1612 FALSE, /* partial_inplace */
1613 0, /* src_mask */
1614 0xffff, /* dst_mask */
1615 FALSE), /* pcrel_offset */
1616
1617 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1618 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1619 16, /* rightshift */
1620 1, /* size (0 = byte, 1 = short, 2 = long) */
1621 16, /* bitsize */
1622 FALSE, /* pc_relative */
1623 0, /* bitpos */
1624 complain_overflow_dont, /* complain_on_overflow */
1625 ppc64_elf_unhandled_reloc, /* special_function */
1626 "R_PPC64_GOT_TLSGD16_HA", /* name */
1627 FALSE, /* partial_inplace */
1628 0, /* src_mask */
1629 0xffff, /* dst_mask */
1630 FALSE), /* pcrel_offset */
1631
1632 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1633 with values (sym+add)@dtpmod and zero, and computes the offset to the
1634 first entry relative to the TOC base (r2). */
1635 HOWTO (R_PPC64_GOT_TLSLD16,
1636 0, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_signed, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSLD16", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSLD16, but no overflow. */
1650 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1651 0, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSLD16_LO", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1665 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1666 16, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_GOT_TLSLD16_HI", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xffff, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1680 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1681 16, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_GOT_TLSLD16_HA", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xffff, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1695 the offset to the entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_DTPREL16_DS", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xfffc, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_DTPREL16_DS, but no overflow. */
1711 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xfffc, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_DTPREL16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_DTPREL16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1756 offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_TPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_TPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_TPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_TPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_TPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_TPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_TPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* GNU extension to record C++ vtable hierarchy. */
1817 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1818 0, /* rightshift */
1819 0, /* size (0 = byte, 1 = short, 2 = long) */
1820 0, /* bitsize */
1821 FALSE, /* pc_relative */
1822 0, /* bitpos */
1823 complain_overflow_dont, /* complain_on_overflow */
1824 NULL, /* special_function */
1825 "R_PPC64_GNU_VTINHERIT", /* name */
1826 FALSE, /* partial_inplace */
1827 0, /* src_mask */
1828 0, /* dst_mask */
1829 FALSE), /* pcrel_offset */
1830
1831 /* GNU extension to record C++ vtable member usage. */
1832 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1833 0, /* rightshift */
1834 0, /* size (0 = byte, 1 = short, 2 = long) */
1835 0, /* bitsize */
1836 FALSE, /* pc_relative */
1837 0, /* bitpos */
1838 complain_overflow_dont, /* complain_on_overflow */
1839 NULL, /* special_function */
1840 "R_PPC64_GNU_VTENTRY", /* name */
1841 FALSE, /* partial_inplace */
1842 0, /* src_mask */
1843 0, /* dst_mask */
1844 FALSE), /* pcrel_offset */
1845 };
1846
1847 \f
1848 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1849 be done. */
1850
1851 static void
1852 ppc_howto_init (void)
1853 {
1854 unsigned int i, type;
1855
1856 for (i = 0;
1857 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1858 i++)
1859 {
1860 type = ppc64_elf_howto_raw[i].type;
1861 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1862 / sizeof (ppc64_elf_howto_table[0])));
1863 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1864 }
1865 }
1866
1867 static reloc_howto_type *
1868 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1869 bfd_reloc_code_real_type code)
1870 {
1871 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1872
1873 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1874 /* Initialize howto table if needed. */
1875 ppc_howto_init ();
1876
1877 switch (code)
1878 {
1879 default:
1880 return NULL;
1881
1882 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1883 break;
1884 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1885 break;
1886 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1887 break;
1888 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1889 break;
1890 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1891 break;
1892 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1893 break;
1894 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1895 break;
1896 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1897 break;
1898 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1899 break;
1900 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1901 break;
1902 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1903 break;
1904 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1905 break;
1906 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1907 break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1909 break;
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1911 break;
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1913 break;
1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1915 break;
1916 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1917 break;
1918 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1919 break;
1920 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1921 break;
1922 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1923 break;
1924 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1925 break;
1926 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1927 break;
1928 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1929 break;
1930 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1931 break;
1932 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1933 break;
1934 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1935 break;
1936 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1937 break;
1938 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1939 break;
1940 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1941 break;
1942 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1943 break;
1944 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1945 break;
1946 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1947 break;
1948 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1949 break;
1950 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1951 break;
1952 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1953 break;
1954 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1955 break;
1956 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1957 break;
1958 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1959 break;
1960 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1961 break;
1962 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1963 break;
1964 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1965 break;
1966 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1967 break;
1968 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1969 break;
1970 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1971 break;
1972 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1973 break;
1974 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1975 break;
1976 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1977 break;
1978 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1979 break;
1980 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1981 break;
1982 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1983 break;
1984 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1985 break;
1986 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1987 break;
1988 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1989 break;
1990 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1991 break;
1992 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
1997 break;
1998 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
1999 break;
2000 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2001 break;
2002 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2003 break;
2004 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2005 break;
2006 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2007 break;
2008 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2009 break;
2010 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2011 break;
2012 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2013 break;
2014 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2015 break;
2016 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2017 break;
2018 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2019 break;
2020 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2021 break;
2022 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2023 break;
2024 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2025 break;
2026 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2027 break;
2028 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2029 break;
2030 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2031 break;
2032 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2033 break;
2034 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2035 break;
2036 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2037 break;
2038 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2039 break;
2040 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2041 break;
2042 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2047 break;
2048 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2049 break;
2050 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2051 break;
2052 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2053 break;
2054 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2055 break;
2056 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2057 break;
2058 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2059 break;
2060 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2061 break;
2062 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2063 break;
2064 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2065 break;
2066 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2067 break;
2068 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2069 break;
2070 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2071 break;
2072 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2073 break;
2074 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2075 break;
2076 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2077 break;
2078 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2079 break;
2080 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2081 break;
2082 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2083 break;
2084 }
2085
2086 return ppc64_elf_howto_table[r];
2087 };
2088
2089 /* Set the howto pointer for a PowerPC ELF reloc. */
2090
2091 static void
2092 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2093 Elf_Internal_Rela *dst)
2094 {
2095 unsigned int type;
2096
2097 /* Initialize howto table if needed. */
2098 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2099 ppc_howto_init ();
2100
2101 type = ELF64_R_TYPE (dst->r_info);
2102 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2103 / sizeof (ppc64_elf_howto_table[0])));
2104 cache_ptr->howto = ppc64_elf_howto_table[type];
2105 }
2106
2107 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2108
2109 static bfd_reloc_status_type
2110 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2111 void *data, asection *input_section,
2112 bfd *output_bfd, char **error_message)
2113 {
2114 /* If this is a relocatable link (output_bfd test tells us), just
2115 call the generic function. Any adjustment will be done at final
2116 link time. */
2117 if (output_bfd != NULL)
2118 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2119 input_section, output_bfd, error_message);
2120
2121 /* Adjust the addend for sign extension of the low 16 bits.
2122 We won't actually be using the low 16 bits, so trashing them
2123 doesn't matter. */
2124 reloc_entry->addend += 0x8000;
2125 return bfd_reloc_continue;
2126 }
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 long insn;
2134 enum elf_ppc64_reloc_type r_type;
2135 bfd_size_type octets;
2136 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2137 bfd_boolean is_power4 = FALSE;
2138
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2147 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2148 insn &= ~(0x01 << 21);
2149 r_type = reloc_entry->howto->type;
2150 if (r_type == R_PPC64_ADDR14_BRTAKEN
2151 || r_type == R_PPC64_REL14_BRTAKEN)
2152 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2153
2154 if (is_power4)
2155 {
2156 /* Set 'a' bit. This is 0b00010 in BO field for branch
2157 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2158 for branch on CTR insns (BO == 1a00t or 1a01t). */
2159 if ((insn & (0x14 << 21)) == (0x04 << 21))
2160 insn |= 0x02 << 21;
2161 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2162 insn |= 0x08 << 21;
2163 else
2164 return bfd_reloc_continue;
2165 }
2166 else
2167 {
2168 bfd_vma target = 0;
2169 bfd_vma from;
2170
2171 if (!bfd_is_com_section (symbol->section))
2172 target = symbol->value;
2173 target += symbol->section->output_section->vma;
2174 target += symbol->section->output_offset;
2175 target += reloc_entry->addend;
2176
2177 from = (reloc_entry->address
2178 + input_section->output_offset
2179 + input_section->output_section->vma);
2180
2181 /* Invert 'y' bit if not the default. */
2182 if ((bfd_signed_vma) (target - from) < 0)
2183 insn ^= 0x01 << 21;
2184 }
2185 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2186 return bfd_reloc_continue;
2187 }
2188
2189 static bfd_reloc_status_type
2190 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2191 void *data, asection *input_section,
2192 bfd *output_bfd, char **error_message)
2193 {
2194 /* If this is a relocatable link (output_bfd test tells us), just
2195 call the generic function. Any adjustment will be done at final
2196 link time. */
2197 if (output_bfd != NULL)
2198 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2199 input_section, output_bfd, error_message);
2200
2201 /* Subtract the symbol section base address. */
2202 reloc_entry->addend -= symbol->section->output_section->vma;
2203 return bfd_reloc_continue;
2204 }
2205
2206 static bfd_reloc_status_type
2207 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2208 void *data, asection *input_section,
2209 bfd *output_bfd, char **error_message)
2210 {
2211 /* If this is a relocatable link (output_bfd test tells us), just
2212 call the generic function. Any adjustment will be done at final
2213 link time. */
2214 if (output_bfd != NULL)
2215 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2216 input_section, output_bfd, error_message);
2217
2218 /* Subtract the symbol section base address. */
2219 reloc_entry->addend -= symbol->section->output_section->vma;
2220
2221 /* Adjust the addend for sign extension of the low 16 bits. */
2222 reloc_entry->addend += 0x8000;
2223 return bfd_reloc_continue;
2224 }
2225
2226 static bfd_reloc_status_type
2227 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2228 void *data, asection *input_section,
2229 bfd *output_bfd, char **error_message)
2230 {
2231 bfd_vma TOCstart;
2232
2233 /* If this is a relocatable link (output_bfd test tells us), just
2234 call the generic function. Any adjustment will be done at final
2235 link time. */
2236 if (output_bfd != NULL)
2237 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2238 input_section, output_bfd, error_message);
2239
2240 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2241 if (TOCstart == 0)
2242 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2243
2244 /* Subtract the TOC base address. */
2245 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2246 return bfd_reloc_continue;
2247 }
2248
2249 static bfd_reloc_status_type
2250 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2251 void *data, asection *input_section,
2252 bfd *output_bfd, char **error_message)
2253 {
2254 bfd_vma TOCstart;
2255
2256 /* If this is a relocatable link (output_bfd test tells us), just
2257 call the generic function. Any adjustment will be done at final
2258 link time. */
2259 if (output_bfd != NULL)
2260 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2261 input_section, output_bfd, error_message);
2262
2263 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2264 if (TOCstart == 0)
2265 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2266
2267 /* Subtract the TOC base address. */
2268 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2269
2270 /* Adjust the addend for sign extension of the low 16 bits. */
2271 reloc_entry->addend += 0x8000;
2272 return bfd_reloc_continue;
2273 }
2274
2275 static bfd_reloc_status_type
2276 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2277 void *data, asection *input_section,
2278 bfd *output_bfd, char **error_message)
2279 {
2280 bfd_vma TOCstart;
2281 bfd_size_type octets;
2282
2283 /* If this is a relocatable link (output_bfd test tells us), just
2284 call the generic function. Any adjustment will be done at final
2285 link time. */
2286 if (output_bfd != NULL)
2287 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2288 input_section, output_bfd, error_message);
2289
2290 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2291 if (TOCstart == 0)
2292 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2293
2294 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2295 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2296 return bfd_reloc_ok;
2297 }
2298
2299 static bfd_reloc_status_type
2300 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2301 void *data, asection *input_section,
2302 bfd *output_bfd, char **error_message)
2303 {
2304 /* If this is a relocatable link (output_bfd test tells us), just
2305 call the generic function. Any adjustment will be done at final
2306 link time. */
2307 if (output_bfd != NULL)
2308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2309 input_section, output_bfd, error_message);
2310
2311 if (error_message != NULL)
2312 {
2313 static char buf[60];
2314 sprintf (buf, "generic linker can't handle %s",
2315 reloc_entry->howto->name);
2316 *error_message = buf;
2317 }
2318 return bfd_reloc_dangerous;
2319 }
2320
2321 struct ppc64_elf_obj_tdata
2322 {
2323 struct elf_obj_tdata elf;
2324
2325 /* Shortcuts to dynamic linker sections. */
2326 asection *got;
2327 asection *relgot;
2328
2329 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2330 sections means we potentially need one of these for each input bfd. */
2331 union {
2332 bfd_signed_vma refcount;
2333 bfd_vma offset;
2334 } tlsld_got;
2335 };
2336
2337 #define ppc64_elf_tdata(bfd) \
2338 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2339
2340 #define ppc64_tlsld_got(bfd) \
2341 (&ppc64_elf_tdata (bfd)->tlsld_got)
2342
2343 /* Override the generic function because we store some extras. */
2344
2345 static bfd_boolean
2346 ppc64_elf_mkobject (bfd *abfd)
2347 {
2348 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2349 abfd->tdata.any = bfd_zalloc (abfd, amt);
2350 if (abfd->tdata.any == NULL)
2351 return FALSE;
2352 return TRUE;
2353 }
2354
2355 /* Fix bad default arch selected for a 64 bit input bfd when the
2356 default is 32 bit. */
2357
2358 static bfd_boolean
2359 ppc64_elf_object_p (bfd *abfd)
2360 {
2361 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2362 {
2363 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2364
2365 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2366 {
2367 /* Relies on arch after 32 bit default being 64 bit default. */
2368 abfd->arch_info = abfd->arch_info->next;
2369 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2370 }
2371 }
2372 return TRUE;
2373 }
2374
2375 /* Merge backend specific data from an object file to the output
2376 object file when linking. */
2377
2378 static bfd_boolean
2379 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2380 {
2381 /* Check if we have the same endianess. */
2382 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2383 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2384 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2385 {
2386 const char *msg;
2387
2388 if (bfd_big_endian (ibfd))
2389 msg = _("%s: compiled for a big endian system "
2390 "and target is little endian");
2391 else
2392 msg = _("%s: compiled for a little endian system "
2393 "and target is big endian");
2394
2395 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2396
2397 bfd_set_error (bfd_error_wrong_format);
2398 return FALSE;
2399 }
2400
2401 return TRUE;
2402 }
2403
2404 /* Add extra PPC sections. */
2405
2406 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2407 {
2408 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2409 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2410 { ".plt", 4, 0, SHT_NOBITS, 0 },
2411 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2412 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2413 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2414 { NULL, 0, 0, 0, 0 }
2415 };
2416
2417 struct _ppc64_elf_section_data
2418 {
2419 struct bfd_elf_section_data elf;
2420
2421 /* An array with one entry for each opd function descriptor. */
2422 union
2423 {
2424 /* Points to the function code section for local opd entries. */
2425 asection **func_sec;
2426 /* After editing .opd, adjust references to opd local syms. */
2427 long *adjust;
2428 } opd;
2429
2430 /* An array for toc sections, indexed by offset/8.
2431 Specifies the relocation symbol index used at a given toc offset. */
2432 unsigned *t_symndx;
2433 };
2434
2435 #define ppc64_elf_section_data(sec) \
2436 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2437
2438 static bfd_boolean
2439 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2440 {
2441 struct _ppc64_elf_section_data *sdata;
2442 bfd_size_type amt = sizeof (*sdata);
2443
2444 sdata = bfd_zalloc (abfd, amt);
2445 if (sdata == NULL)
2446 return FALSE;
2447 sec->used_by_bfd = sdata;
2448
2449 return _bfd_elf_new_section_hook (abfd, sec);
2450 }
2451 \f
2452 /* The following functions are specific to the ELF linker, while
2453 functions above are used generally. Those named ppc64_elf_* are
2454 called by the main ELF linker code. They appear in this file more
2455 or less in the order in which they are called. eg.
2456 ppc64_elf_check_relocs is called early in the link process,
2457 ppc64_elf_finish_dynamic_sections is one of the last functions
2458 called.
2459
2460 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2461 functions have both a function code symbol and a function descriptor
2462 symbol. A call to foo in a relocatable object file looks like:
2463
2464 . .text
2465 . x:
2466 . bl .foo
2467 . nop
2468
2469 The function definition in another object file might be:
2470
2471 . .section .opd
2472 . foo: .quad .foo
2473 . .quad .TOC.@tocbase
2474 . .quad 0
2475 .
2476 . .text
2477 . .foo: blr
2478
2479 When the linker resolves the call during a static link, the branch
2480 unsurprisingly just goes to .foo and the .opd information is unused.
2481 If the function definition is in a shared library, things are a little
2482 different: The call goes via a plt call stub, the opd information gets
2483 copied to the plt, and the linker patches the nop.
2484
2485 . x:
2486 . bl .foo_stub
2487 . ld 2,40(1)
2488 .
2489 .
2490 . .foo_stub:
2491 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2492 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2493 . std 2,40(1) # this is the general idea
2494 . ld 11,0(12)
2495 . ld 2,8(12)
2496 . mtctr 11
2497 . ld 11,16(12)
2498 . bctr
2499 .
2500 . .section .plt
2501 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2502
2503 The "reloc ()" notation is supposed to indicate that the linker emits
2504 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2505 copying.
2506
2507 What are the difficulties here? Well, firstly, the relocations
2508 examined by the linker in check_relocs are against the function code
2509 sym .foo, while the dynamic relocation in the plt is emitted against
2510 the function descriptor symbol, foo. Somewhere along the line, we need
2511 to carefully copy dynamic link information from one symbol to the other.
2512 Secondly, the generic part of the elf linker will make .foo a dynamic
2513 symbol as is normal for most other backends. We need foo dynamic
2514 instead, at least for an application final link. However, when
2515 creating a shared library containing foo, we need to have both symbols
2516 dynamic so that references to .foo are satisfied during the early
2517 stages of linking. Otherwise the linker might decide to pull in a
2518 definition from some other object, eg. a static library. */
2519
2520 /* The linker needs to keep track of the number of relocs that it
2521 decides to copy as dynamic relocs in check_relocs for each symbol.
2522 This is so that it can later discard them if they are found to be
2523 unnecessary. We store the information in a field extending the
2524 regular ELF linker hash table. */
2525
2526 struct ppc_dyn_relocs
2527 {
2528 struct ppc_dyn_relocs *next;
2529
2530 /* The input section of the reloc. */
2531 asection *sec;
2532
2533 /* Total number of relocs copied for the input section. */
2534 bfd_size_type count;
2535
2536 /* Number of pc-relative relocs copied for the input section. */
2537 bfd_size_type pc_count;
2538 };
2539
2540 /* Track GOT entries needed for a given symbol. We might need more
2541 than one got entry per symbol. */
2542 struct got_entry
2543 {
2544 struct got_entry *next;
2545
2546 /* The symbol addend that we'll be placing in the GOT. */
2547 bfd_vma addend;
2548
2549 /* Unlike other ELF targets, we use separate GOT entries for the same
2550 symbol referenced from different input files. This is to support
2551 automatic multiple TOC/GOT sections, where the TOC base can vary
2552 from one input file to another.
2553
2554 Point to the BFD owning this GOT entry. */
2555 bfd *owner;
2556
2557 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2558 TLS_TPREL or TLS_DTPREL for tls entries. */
2559 char tls_type;
2560
2561 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2562 union
2563 {
2564 bfd_signed_vma refcount;
2565 bfd_vma offset;
2566 } got;
2567 };
2568
2569 /* The same for PLT. */
2570 struct plt_entry
2571 {
2572 struct plt_entry *next;
2573
2574 bfd_vma addend;
2575
2576 union
2577 {
2578 bfd_signed_vma refcount;
2579 bfd_vma offset;
2580 } plt;
2581 };
2582
2583 /* Of those relocs that might be copied as dynamic relocs, this macro
2584 selects those that must be copied when linking a shared library,
2585 even when the symbol is local. */
2586
2587 #define MUST_BE_DYN_RELOC(RTYPE) \
2588 ((RTYPE) != R_PPC64_REL32 \
2589 && (RTYPE) != R_PPC64_REL64 \
2590 && (RTYPE) != R_PPC64_REL30)
2591
2592 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2593 copying dynamic variables from a shared lib into an app's dynbss
2594 section, and instead use a dynamic relocation to point into the
2595 shared lib. With code that gcc generates, it's vital that this be
2596 enabled; In the PowerPC64 ABI, the address of a function is actually
2597 the address of a function descriptor, which resides in the .opd
2598 section. gcc uses the descriptor directly rather than going via the
2599 GOT as some other ABI's do, which means that initialized function
2600 pointers must reference the descriptor. Thus, a function pointer
2601 initialized to the address of a function in a shared library will
2602 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2603 redefines the function desctriptor symbol to point to the copy. This
2604 presents a problem as a plt entry for that function is also
2605 initialized from the function descriptor symbol and the copy reloc
2606 may not be initialized first. */
2607 #define ELIMINATE_COPY_RELOCS 1
2608
2609 /* Section name for stubs is the associated section name plus this
2610 string. */
2611 #define STUB_SUFFIX ".stub"
2612
2613 /* Linker stubs.
2614 ppc_stub_long_branch:
2615 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2616 destination, but a 24 bit branch in a stub section will reach.
2617 . b dest
2618
2619 ppc_stub_plt_branch:
2620 Similar to the above, but a 24 bit branch in the stub section won't
2621 reach its destination.
2622 . addis %r12,%r2,xxx@toc@ha
2623 . ld %r11,xxx@toc@l(%r12)
2624 . mtctr %r11
2625 . bctr
2626
2627 ppc_stub_plt_call:
2628 Used to call a function in a shared library.
2629 . addis %r12,%r2,xxx@toc@ha
2630 . std %r2,40(%r1)
2631 . ld %r11,xxx+0@toc@l(%r12)
2632 . ld %r2,xxx+8@toc@l(%r12)
2633 . mtctr %r11
2634 . ld %r11,xxx+16@toc@l(%r12)
2635 . bctr
2636
2637 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2638 code to adjust the value and save r2 to support multiple toc sections.
2639 A ppc_stub_long_branch with an r2 offset looks like:
2640 . std %r2,40(%r1)
2641 . addis %r2,%r2,off@ha
2642 . addi %r2,%r2,off@l
2643 . b dest
2644
2645 A ppc_stub_plt_branch with an r2 offset looks like:
2646 . std %r2,40(%r1)
2647 . addis %r12,%r2,xxx@toc@ha
2648 . ld %r11,xxx@toc@l(%r12)
2649 . addis %r2,%r2,off@ha
2650 . addi %r2,%r2,off@l
2651 . mtctr %r11
2652 . bctr
2653 */
2654
2655 enum ppc_stub_type {
2656 ppc_stub_none,
2657 ppc_stub_long_branch,
2658 ppc_stub_long_branch_r2off,
2659 ppc_stub_plt_branch,
2660 ppc_stub_plt_branch_r2off,
2661 ppc_stub_plt_call
2662 };
2663
2664 struct ppc_stub_hash_entry {
2665
2666 /* Base hash table entry structure. */
2667 struct bfd_hash_entry root;
2668
2669 enum ppc_stub_type stub_type;
2670
2671 /* The stub section. */
2672 asection *stub_sec;
2673
2674 /* Offset within stub_sec of the beginning of this stub. */
2675 bfd_vma stub_offset;
2676
2677 /* Given the symbol's value and its section we can determine its final
2678 value when building the stubs (so the stub knows where to jump. */
2679 bfd_vma target_value;
2680 asection *target_section;
2681
2682 /* The symbol table entry, if any, that this was derived from. */
2683 struct ppc_link_hash_entry *h;
2684
2685 /* And the reloc addend that this was derived from. */
2686 bfd_vma addend;
2687
2688 /* Where this stub is being called from, or, in the case of combined
2689 stub sections, the first input section in the group. */
2690 asection *id_sec;
2691 };
2692
2693 struct ppc_branch_hash_entry {
2694
2695 /* Base hash table entry structure. */
2696 struct bfd_hash_entry root;
2697
2698 /* Offset within .branch_lt. */
2699 unsigned int offset;
2700
2701 /* Generation marker. */
2702 unsigned int iter;
2703 };
2704
2705 struct ppc_link_hash_entry
2706 {
2707 struct elf_link_hash_entry elf;
2708
2709 /* A pointer to the most recently used stub hash entry against this
2710 symbol. */
2711 struct ppc_stub_hash_entry *stub_cache;
2712
2713 /* Track dynamic relocs copied for this symbol. */
2714 struct ppc_dyn_relocs *dyn_relocs;
2715
2716 /* Link between function code and descriptor symbols. */
2717 struct elf_link_hash_entry *oh;
2718
2719 /* Flag function code and descriptor symbols. */
2720 unsigned int is_func:1;
2721 unsigned int is_func_descriptor:1;
2722 unsigned int is_entry:1;
2723
2724 /* Contexts in which symbol is used in the GOT (or TOC).
2725 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2726 corresponding relocs are encountered during check_relocs.
2727 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2728 indicate the corresponding GOT entry type is not needed.
2729 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2730 a TPREL one. We use a separate flag rather than setting TPREL
2731 just for convenience in distinguishing the two cases. */
2732 #define TLS_GD 1 /* GD reloc. */
2733 #define TLS_LD 2 /* LD reloc. */
2734 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2735 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2736 #define TLS_TLS 16 /* Any TLS reloc. */
2737 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2738 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2739 char tls_mask;
2740 };
2741
2742 /* ppc64 ELF linker hash table. */
2743
2744 struct ppc_link_hash_table
2745 {
2746 struct elf_link_hash_table elf;
2747
2748 /* The stub hash table. */
2749 struct bfd_hash_table stub_hash_table;
2750
2751 /* Another hash table for plt_branch stubs. */
2752 struct bfd_hash_table branch_hash_table;
2753
2754 /* Linker stub bfd. */
2755 bfd *stub_bfd;
2756
2757 /* Linker call-backs. */
2758 asection * (*add_stub_section) (const char *, asection *);
2759 void (*layout_sections_again) (void);
2760
2761 /* Array to keep track of which stub sections have been created, and
2762 information on stub grouping. */
2763 struct map_stub {
2764 /* This is the section to which stubs in the group will be attached. */
2765 asection *link_sec;
2766 /* The stub section. */
2767 asection *stub_sec;
2768 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2769 bfd_vma toc_off;
2770 } *stub_group;
2771
2772 /* Support for multiple toc sections. */
2773 unsigned int no_multi_toc;
2774 unsigned int multi_toc_needed;
2775
2776 /* Temp used when calculating TOC pointers. */
2777 bfd_vma toc_curr;
2778
2779 /* Highest input section id. */
2780 int top_id;
2781
2782 /* Highest output section index. */
2783 int top_index;
2784
2785 /* List of input sections for each output section. */
2786 asection **input_list;
2787
2788 /* Short-cuts to get to dynamic linker sections. */
2789 asection *got;
2790 asection *plt;
2791 asection *relplt;
2792 asection *dynbss;
2793 asection *relbss;
2794 asection *glink;
2795 asection *sfpr;
2796 asection *brlt;
2797 asection *relbrlt;
2798
2799 /* Short-cut to first output tls section. */
2800 asection *tls_sec;
2801
2802 /* Shortcut to .__tls_get_addr. */
2803 struct elf_link_hash_entry *tls_get_addr;
2804
2805 /* Statistics. */
2806 unsigned long stub_count[ppc_stub_plt_call];
2807
2808 /* Set if we should emit symbols for stubs. */
2809 unsigned int emit_stub_syms;
2810
2811 /* Set on error. */
2812 unsigned int stub_error;
2813
2814 /* Flag set when small branches are detected. Used to
2815 select suitable defaults for the stub group size. */
2816 unsigned int has_14bit_branch;
2817
2818 /* Set if we detect a reference undefined weak symbol. */
2819 unsigned int have_undefweak;
2820
2821 /* Incremented every time we size stubs. */
2822 unsigned int stub_iteration;
2823
2824 /* Small local sym to section mapping cache. */
2825 struct sym_sec_cache sym_sec;
2826 };
2827
2828 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2829
2830 #define ppc_hash_table(p) \
2831 ((struct ppc_link_hash_table *) ((p)->hash))
2832
2833 #define ppc_stub_hash_lookup(table, string, create, copy) \
2834 ((struct ppc_stub_hash_entry *) \
2835 bfd_hash_lookup ((table), (string), (create), (copy)))
2836
2837 #define ppc_branch_hash_lookup(table, string, create, copy) \
2838 ((struct ppc_branch_hash_entry *) \
2839 bfd_hash_lookup ((table), (string), (create), (copy)))
2840
2841 /* Create an entry in the stub hash table. */
2842
2843 static struct bfd_hash_entry *
2844 stub_hash_newfunc (struct bfd_hash_entry *entry,
2845 struct bfd_hash_table *table,
2846 const char *string)
2847 {
2848 /* Allocate the structure if it has not already been allocated by a
2849 subclass. */
2850 if (entry == NULL)
2851 {
2852 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2853 if (entry == NULL)
2854 return entry;
2855 }
2856
2857 /* Call the allocation method of the superclass. */
2858 entry = bfd_hash_newfunc (entry, table, string);
2859 if (entry != NULL)
2860 {
2861 struct ppc_stub_hash_entry *eh;
2862
2863 /* Initialize the local fields. */
2864 eh = (struct ppc_stub_hash_entry *) entry;
2865 eh->stub_type = ppc_stub_none;
2866 eh->stub_sec = NULL;
2867 eh->stub_offset = 0;
2868 eh->target_value = 0;
2869 eh->target_section = NULL;
2870 eh->h = NULL;
2871 eh->id_sec = NULL;
2872 }
2873
2874 return entry;
2875 }
2876
2877 /* Create an entry in the branch hash table. */
2878
2879 static struct bfd_hash_entry *
2880 branch_hash_newfunc (struct bfd_hash_entry *entry,
2881 struct bfd_hash_table *table,
2882 const char *string)
2883 {
2884 /* Allocate the structure if it has not already been allocated by a
2885 subclass. */
2886 if (entry == NULL)
2887 {
2888 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2889 if (entry == NULL)
2890 return entry;
2891 }
2892
2893 /* Call the allocation method of the superclass. */
2894 entry = bfd_hash_newfunc (entry, table, string);
2895 if (entry != NULL)
2896 {
2897 struct ppc_branch_hash_entry *eh;
2898
2899 /* Initialize the local fields. */
2900 eh = (struct ppc_branch_hash_entry *) entry;
2901 eh->offset = 0;
2902 eh->iter = 0;
2903 }
2904
2905 return entry;
2906 }
2907
2908 /* Create an entry in a ppc64 ELF linker hash table. */
2909
2910 static struct bfd_hash_entry *
2911 link_hash_newfunc (struct bfd_hash_entry *entry,
2912 struct bfd_hash_table *table,
2913 const char *string)
2914 {
2915 /* Allocate the structure if it has not already been allocated by a
2916 subclass. */
2917 if (entry == NULL)
2918 {
2919 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2920 if (entry == NULL)
2921 return entry;
2922 }
2923
2924 /* Call the allocation method of the superclass. */
2925 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2926 if (entry != NULL)
2927 {
2928 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2929
2930 eh->stub_cache = NULL;
2931 eh->dyn_relocs = NULL;
2932 eh->oh = NULL;
2933 eh->is_func = 0;
2934 eh->is_func_descriptor = 0;
2935 eh->is_entry = 0;
2936 eh->tls_mask = 0;
2937 }
2938
2939 return entry;
2940 }
2941
2942 /* Create a ppc64 ELF linker hash table. */
2943
2944 static struct bfd_link_hash_table *
2945 ppc64_elf_link_hash_table_create (bfd *abfd)
2946 {
2947 struct ppc_link_hash_table *htab;
2948 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2949
2950 htab = bfd_zmalloc (amt);
2951 if (htab == NULL)
2952 return NULL;
2953
2954 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2955 {
2956 free (htab);
2957 return NULL;
2958 }
2959
2960 /* Init the stub hash table too. */
2961 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2962 return NULL;
2963
2964 /* And the branch hash table. */
2965 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2966 return NULL;
2967
2968 /* Initializing two fields of the union is just cosmetic. We really
2969 only care about glist, but when compiled on a 32-bit host the
2970 bfd_vma fields are larger. Setting the bfd_vma to zero makes
2971 debugger inspection of these fields look nicer. */
2972 htab->elf.init_refcount.refcount = 0;
2973 htab->elf.init_refcount.glist = NULL;
2974 htab->elf.init_offset.offset = 0;
2975 htab->elf.init_offset.glist = NULL;
2976
2977 return &htab->elf.root;
2978 }
2979
2980 /* Free the derived linker hash table. */
2981
2982 static void
2983 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
2984 {
2985 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2986
2987 bfd_hash_table_free (&ret->stub_hash_table);
2988 bfd_hash_table_free (&ret->branch_hash_table);
2989 _bfd_generic_link_hash_table_free (hash);
2990 }
2991
2992 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
2993
2994 void
2995 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
2996 {
2997 struct ppc_link_hash_table *htab;
2998
2999 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3000
3001 /* Always hook our dynamic sections into the first bfd, which is the
3002 linker created stub bfd. This ensures that the GOT header is at
3003 the start of the output TOC section. */
3004 htab = ppc_hash_table (info);
3005 htab->stub_bfd = abfd;
3006 htab->elf.dynobj = abfd;
3007 }
3008
3009 /* Build a name for an entry in the stub hash table. */
3010
3011 static char *
3012 ppc_stub_name (const asection *input_section,
3013 const asection *sym_sec,
3014 const struct ppc_link_hash_entry *h,
3015 const Elf_Internal_Rela *rel)
3016 {
3017 char *stub_name;
3018 bfd_size_type len;
3019
3020 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3021 offsets from a sym as a branch target? In fact, we could
3022 probably assume the addend is always zero. */
3023 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3024
3025 if (h)
3026 {
3027 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3028 stub_name = bfd_malloc (len);
3029 if (stub_name != NULL)
3030 {
3031 sprintf (stub_name, "%08x.%s+%x",
3032 input_section->id & 0xffffffff,
3033 h->elf.root.root.string,
3034 (int) rel->r_addend & 0xffffffff);
3035 }
3036 }
3037 else
3038 {
3039 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3040 stub_name = bfd_malloc (len);
3041 if (stub_name != NULL)
3042 {
3043 sprintf (stub_name, "%08x.%x:%x+%x",
3044 input_section->id & 0xffffffff,
3045 sym_sec->id & 0xffffffff,
3046 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3047 (int) rel->r_addend & 0xffffffff);
3048 }
3049 }
3050 return stub_name;
3051 }
3052
3053 /* Look up an entry in the stub hash. Stub entries are cached because
3054 creating the stub name takes a bit of time. */
3055
3056 static struct ppc_stub_hash_entry *
3057 ppc_get_stub_entry (const asection *input_section,
3058 const asection *sym_sec,
3059 struct elf_link_hash_entry *hash,
3060 const Elf_Internal_Rela *rel,
3061 struct ppc_link_hash_table *htab)
3062 {
3063 struct ppc_stub_hash_entry *stub_entry;
3064 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3065 const asection *id_sec;
3066
3067 /* If this input section is part of a group of sections sharing one
3068 stub section, then use the id of the first section in the group.
3069 Stub names need to include a section id, as there may well be
3070 more than one stub used to reach say, printf, and we need to
3071 distinguish between them. */
3072 id_sec = htab->stub_group[input_section->id].link_sec;
3073
3074 if (h != NULL && h->stub_cache != NULL
3075 && h->stub_cache->h == h
3076 && h->stub_cache->id_sec == id_sec)
3077 {
3078 stub_entry = h->stub_cache;
3079 }
3080 else
3081 {
3082 char *stub_name;
3083
3084 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3085 if (stub_name == NULL)
3086 return NULL;
3087
3088 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3089 stub_name, FALSE, FALSE);
3090 if (h != NULL)
3091 h->stub_cache = stub_entry;
3092
3093 free (stub_name);
3094 }
3095
3096 return stub_entry;
3097 }
3098
3099 /* Add a new stub entry to the stub hash. Not all fields of the new
3100 stub entry are initialised. */
3101
3102 static struct ppc_stub_hash_entry *
3103 ppc_add_stub (const char *stub_name,
3104 asection *section,
3105 struct ppc_link_hash_table *htab)
3106 {
3107 asection *link_sec;
3108 asection *stub_sec;
3109 struct ppc_stub_hash_entry *stub_entry;
3110
3111 link_sec = htab->stub_group[section->id].link_sec;
3112 stub_sec = htab->stub_group[section->id].stub_sec;
3113 if (stub_sec == NULL)
3114 {
3115 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3116 if (stub_sec == NULL)
3117 {
3118 size_t namelen;
3119 bfd_size_type len;
3120 char *s_name;
3121
3122 namelen = strlen (link_sec->name);
3123 len = namelen + sizeof (STUB_SUFFIX);
3124 s_name = bfd_alloc (htab->stub_bfd, len);
3125 if (s_name == NULL)
3126 return NULL;
3127
3128 memcpy (s_name, link_sec->name, namelen);
3129 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3130 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3131 if (stub_sec == NULL)
3132 return NULL;
3133 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3134 }
3135 htab->stub_group[section->id].stub_sec = stub_sec;
3136 }
3137
3138 /* Enter this entry into the linker stub hash table. */
3139 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3140 TRUE, FALSE);
3141 if (stub_entry == NULL)
3142 {
3143 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3144 bfd_archive_filename (section->owner),
3145 stub_name);
3146 return NULL;
3147 }
3148
3149 stub_entry->stub_sec = stub_sec;
3150 stub_entry->stub_offset = 0;
3151 stub_entry->id_sec = link_sec;
3152 return stub_entry;
3153 }
3154
3155 /* Create sections for linker generated code. */
3156
3157 static bfd_boolean
3158 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3159 {
3160 struct ppc_link_hash_table *htab;
3161 flagword flags;
3162
3163 htab = ppc_hash_table (info);
3164
3165 /* Create .sfpr for code to save and restore fp regs. */
3166 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3167 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3168 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3169 if (htab->sfpr == NULL
3170 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3171 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3172 return FALSE;
3173
3174 /* Create .glink for lazy dynamic linking support. */
3175 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3176 if (htab->glink == NULL
3177 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3178 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3179 return FALSE;
3180
3181 /* Create .branch_lt for plt_branch stubs. */
3182 flags = (SEC_ALLOC | SEC_LOAD
3183 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3184 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3185 if (htab->brlt == NULL
3186 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3187 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3188 return FALSE;
3189
3190 if (info->shared)
3191 {
3192 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3193 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3194 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3195 if (!htab->relbrlt
3196 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3197 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3198 return FALSE;
3199 }
3200 return TRUE;
3201 }
3202
3203 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3204 not already done. */
3205
3206 static bfd_boolean
3207 create_got_section (bfd *abfd, struct bfd_link_info *info)
3208 {
3209 asection *got, *relgot;
3210 flagword flags;
3211 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3212
3213 if (!htab->got)
3214 {
3215 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3216 return FALSE;
3217
3218 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3219 if (!htab->got)
3220 abort ();
3221 }
3222
3223 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3224 | SEC_LINKER_CREATED);
3225
3226 got = bfd_make_section (abfd, ".got");
3227 if (!got
3228 || !bfd_set_section_flags (abfd, got, flags)
3229 || !bfd_set_section_alignment (abfd, got, 3))
3230 return FALSE;
3231
3232 relgot = bfd_make_section (abfd, ".rela.got");
3233 if (!relgot
3234 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3235 || ! bfd_set_section_alignment (abfd, relgot, 3))
3236 return FALSE;
3237
3238 ppc64_elf_tdata (abfd)->got = got;
3239 ppc64_elf_tdata (abfd)->relgot = relgot;
3240 return TRUE;
3241 }
3242
3243 /* Create the dynamic sections, and set up shortcuts. */
3244
3245 static bfd_boolean
3246 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3247 {
3248 struct ppc_link_hash_table *htab;
3249
3250 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3251 return FALSE;
3252
3253 htab = ppc_hash_table (info);
3254 if (!htab->got)
3255 htab->got = bfd_get_section_by_name (dynobj, ".got");
3256 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3257 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3258 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3259 if (!info->shared)
3260 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3261
3262 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3263 || (!info->shared && !htab->relbss))
3264 abort ();
3265
3266 return TRUE;
3267 }
3268
3269 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3270
3271 static void
3272 ppc64_elf_copy_indirect_symbol
3273 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3274 struct elf_link_hash_entry *dir,
3275 struct elf_link_hash_entry *ind)
3276 {
3277 struct ppc_link_hash_entry *edir, *eind;
3278 flagword mask;
3279
3280 edir = (struct ppc_link_hash_entry *) dir;
3281 eind = (struct ppc_link_hash_entry *) ind;
3282
3283 /* Copy over any dynamic relocs we may have on the indirect sym. */
3284 if (eind->dyn_relocs != NULL)
3285 {
3286 if (edir->dyn_relocs != NULL)
3287 {
3288 struct ppc_dyn_relocs **pp;
3289 struct ppc_dyn_relocs *p;
3290
3291 if (eind->elf.root.type == bfd_link_hash_indirect)
3292 abort ();
3293
3294 /* Add reloc counts against the weak sym to the strong sym
3295 list. Merge any entries against the same section. */
3296 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3297 {
3298 struct ppc_dyn_relocs *q;
3299
3300 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3301 if (q->sec == p->sec)
3302 {
3303 q->pc_count += p->pc_count;
3304 q->count += p->count;
3305 *pp = p->next;
3306 break;
3307 }
3308 if (q == NULL)
3309 pp = &p->next;
3310 }
3311 *pp = edir->dyn_relocs;
3312 }
3313
3314 edir->dyn_relocs = eind->dyn_relocs;
3315 eind->dyn_relocs = NULL;
3316 }
3317
3318 edir->is_func |= eind->is_func;
3319 edir->is_func_descriptor |= eind->is_func_descriptor;
3320 edir->is_entry |= eind->is_entry;
3321 edir->tls_mask |= eind->tls_mask;
3322
3323 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3324 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
3325 /* If called to transfer flags for a weakdef during processing
3326 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3327 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3328 if (ELIMINATE_COPY_RELOCS
3329 && eind->elf.root.type != bfd_link_hash_indirect
3330 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3331 mask &= ~ELF_LINK_NON_GOT_REF;
3332
3333 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3334
3335 /* If we were called to copy over info for a weak sym, that's all. */
3336 if (eind->elf.root.type != bfd_link_hash_indirect)
3337 return;
3338
3339 /* Copy over got entries that we may have already seen to the
3340 symbol which just became indirect. */
3341 if (eind->elf.got.glist != NULL)
3342 {
3343 if (edir->elf.got.glist != NULL)
3344 {
3345 struct got_entry **entp;
3346 struct got_entry *ent;
3347
3348 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3349 {
3350 struct got_entry *dent;
3351
3352 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3353 if (dent->addend == ent->addend
3354 && dent->owner == ent->owner
3355 && dent->tls_type == ent->tls_type)
3356 {
3357 dent->got.refcount += ent->got.refcount;
3358 *entp = ent->next;
3359 break;
3360 }
3361 if (dent == NULL)
3362 entp = &ent->next;
3363 }
3364 *entp = edir->elf.got.glist;
3365 }
3366
3367 edir->elf.got.glist = eind->elf.got.glist;
3368 eind->elf.got.glist = NULL;
3369 }
3370
3371 /* And plt entries. */
3372 if (eind->elf.plt.plist != NULL)
3373 {
3374 if (edir->elf.plt.plist != NULL)
3375 {
3376 struct plt_entry **entp;
3377 struct plt_entry *ent;
3378
3379 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3380 {
3381 struct plt_entry *dent;
3382
3383 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3384 if (dent->addend == ent->addend)
3385 {
3386 dent->plt.refcount += ent->plt.refcount;
3387 *entp = ent->next;
3388 break;
3389 }
3390 if (dent == NULL)
3391 entp = &ent->next;
3392 }
3393 *entp = edir->elf.plt.plist;
3394 }
3395
3396 edir->elf.plt.plist = eind->elf.plt.plist;
3397 eind->elf.plt.plist = NULL;
3398 }
3399
3400 if (edir->elf.dynindx == -1)
3401 {
3402 edir->elf.dynindx = eind->elf.dynindx;
3403 edir->elf.dynstr_index = eind->elf.dynstr_index;
3404 eind->elf.dynindx = -1;
3405 eind->elf.dynstr_index = 0;
3406 }
3407 else
3408 BFD_ASSERT (eind->elf.dynindx == -1);
3409 }
3410
3411 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3412 symbols undefined on the command-line. */
3413
3414 bfd_boolean
3415 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3416 {
3417 struct ppc_link_hash_table *htab;
3418 struct bfd_sym_chain *sym;
3419
3420 htab = ppc_hash_table (info);
3421 for (sym = info->gc_sym_list; sym; sym = sym->next)
3422 {
3423 struct elf_link_hash_entry *h;
3424
3425 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3426 if (h != NULL)
3427 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3428 }
3429 return TRUE;
3430 }
3431
3432 static bfd_boolean
3433 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3434 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3435 {
3436 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3437 char *local_got_tls_masks;
3438
3439 if (local_got_ents == NULL)
3440 {
3441 bfd_size_type size = symtab_hdr->sh_info;
3442
3443 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3444 local_got_ents = bfd_zalloc (abfd, size);
3445 if (local_got_ents == NULL)
3446 return FALSE;
3447 elf_local_got_ents (abfd) = local_got_ents;
3448 }
3449
3450 if ((tls_type & TLS_EXPLICIT) == 0)
3451 {
3452 struct got_entry *ent;
3453
3454 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3455 if (ent->addend == r_addend
3456 && ent->owner == abfd
3457 && ent->tls_type == tls_type)
3458 break;
3459 if (ent == NULL)
3460 {
3461 bfd_size_type amt = sizeof (*ent);
3462 ent = bfd_alloc (abfd, amt);
3463 if (ent == NULL)
3464 return FALSE;
3465 ent->next = local_got_ents[r_symndx];
3466 ent->addend = r_addend;
3467 ent->owner = abfd;
3468 ent->tls_type = tls_type;
3469 ent->got.refcount = 0;
3470 local_got_ents[r_symndx] = ent;
3471 }
3472 ent->got.refcount += 1;
3473 }
3474
3475 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3476 local_got_tls_masks[r_symndx] |= tls_type;
3477 return TRUE;
3478 }
3479
3480 static bfd_boolean
3481 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3482 {
3483 struct plt_entry *ent;
3484
3485 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3486 if (ent->addend == addend)
3487 break;
3488 if (ent == NULL)
3489 {
3490 bfd_size_type amt = sizeof (*ent);
3491 ent = bfd_alloc (abfd, amt);
3492 if (ent == NULL)
3493 return FALSE;
3494 ent->next = eh->elf.plt.plist;
3495 ent->addend = addend;
3496 ent->plt.refcount = 0;
3497 eh->elf.plt.plist = ent;
3498 }
3499 ent->plt.refcount += 1;
3500 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3501 eh->is_func = 1;
3502 return TRUE;
3503 }
3504
3505 /* Find the function descriptor hash entry from the given function code
3506 hash entry FH. Link the entries via their OH fields. */
3507 static struct ppc_link_hash_entry *
3508 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3509 {
3510 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3511
3512 if (fdh == NULL)
3513 {
3514 const char *fd_name = fh->elf.root.root.string + 1;
3515
3516 fdh = (struct ppc_link_hash_entry *)
3517 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3518 if (fdh != NULL)
3519 {
3520 fdh->is_func_descriptor = 1;
3521 fdh->oh = &fh->elf;
3522 fh->is_func = 1;
3523 fh->oh = &fdh->elf;
3524 }
3525 }
3526
3527 return fdh;
3528 }
3529
3530 /* Look through the relocs for a section during the first phase, and
3531 calculate needed space in the global offset table, procedure
3532 linkage table, and dynamic reloc sections. */
3533
3534 static bfd_boolean
3535 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3536 asection *sec, const Elf_Internal_Rela *relocs)
3537 {
3538 struct ppc_link_hash_table *htab;
3539 Elf_Internal_Shdr *symtab_hdr;
3540 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3541 const Elf_Internal_Rela *rel;
3542 const Elf_Internal_Rela *rel_end;
3543 asection *sreloc;
3544 asection **opd_sym_map;
3545
3546 if (info->relocatable)
3547 return TRUE;
3548
3549 htab = ppc_hash_table (info);
3550 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3551
3552 sym_hashes = elf_sym_hashes (abfd);
3553 sym_hashes_end = (sym_hashes
3554 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3555 - symtab_hdr->sh_info);
3556
3557 sreloc = NULL;
3558 opd_sym_map = NULL;
3559 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3560 {
3561 /* Garbage collection needs some extra help with .opd sections.
3562 We don't want to necessarily keep everything referenced by
3563 relocs in .opd, as that would keep all functions. Instead,
3564 if we reference an .opd symbol (a function descriptor), we
3565 want to keep the function code symbol's section. This is
3566 easy for global symbols, but for local syms we need to keep
3567 information about the associated function section. Later, if
3568 edit_opd deletes entries, we'll use this array to adjust
3569 local syms in .opd. */
3570 union opd_info {
3571 asection *func_section;
3572 long entry_adjust;
3573 };
3574 bfd_size_type amt;
3575
3576 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3577 opd_sym_map = bfd_zalloc (abfd, amt);
3578 if (opd_sym_map == NULL)
3579 return FALSE;
3580 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3581 }
3582
3583 if (htab->sfpr == NULL
3584 && !create_linkage_sections (htab->elf.dynobj, info))
3585 return FALSE;
3586
3587 rel_end = relocs + sec->reloc_count;
3588 for (rel = relocs; rel < rel_end; rel++)
3589 {
3590 unsigned long r_symndx;
3591 struct elf_link_hash_entry *h;
3592 enum elf_ppc64_reloc_type r_type;
3593 int tls_type = 0;
3594
3595 r_symndx = ELF64_R_SYM (rel->r_info);
3596 if (r_symndx < symtab_hdr->sh_info)
3597 h = NULL;
3598 else
3599 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3600
3601 r_type = ELF64_R_TYPE (rel->r_info);
3602 switch (r_type)
3603 {
3604 case R_PPC64_GOT_TLSLD16:
3605 case R_PPC64_GOT_TLSLD16_LO:
3606 case R_PPC64_GOT_TLSLD16_HI:
3607 case R_PPC64_GOT_TLSLD16_HA:
3608 ppc64_tlsld_got (abfd)->refcount += 1;
3609 tls_type = TLS_TLS | TLS_LD;
3610 goto dogottls;
3611
3612 case R_PPC64_GOT_TLSGD16:
3613 case R_PPC64_GOT_TLSGD16_LO:
3614 case R_PPC64_GOT_TLSGD16_HI:
3615 case R_PPC64_GOT_TLSGD16_HA:
3616 tls_type = TLS_TLS | TLS_GD;
3617 goto dogottls;
3618
3619 case R_PPC64_GOT_TPREL16_DS:
3620 case R_PPC64_GOT_TPREL16_LO_DS:
3621 case R_PPC64_GOT_TPREL16_HI:
3622 case R_PPC64_GOT_TPREL16_HA:
3623 if (info->shared)
3624 info->flags |= DF_STATIC_TLS;
3625 tls_type = TLS_TLS | TLS_TPREL;
3626 goto dogottls;
3627
3628 case R_PPC64_GOT_DTPREL16_DS:
3629 case R_PPC64_GOT_DTPREL16_LO_DS:
3630 case R_PPC64_GOT_DTPREL16_HI:
3631 case R_PPC64_GOT_DTPREL16_HA:
3632 tls_type = TLS_TLS | TLS_DTPREL;
3633 dogottls:
3634 sec->has_tls_reloc = 1;
3635 /* Fall thru */
3636
3637 case R_PPC64_GOT16:
3638 case R_PPC64_GOT16_DS:
3639 case R_PPC64_GOT16_HA:
3640 case R_PPC64_GOT16_HI:
3641 case R_PPC64_GOT16_LO:
3642 case R_PPC64_GOT16_LO_DS:
3643 /* This symbol requires a global offset table entry. */
3644 sec->has_gp_reloc = 1;
3645 if (ppc64_elf_tdata (abfd)->got == NULL
3646 && !create_got_section (abfd, info))
3647 return FALSE;
3648
3649 if (h != NULL)
3650 {
3651 struct ppc_link_hash_entry *eh;
3652 struct got_entry *ent;
3653
3654 eh = (struct ppc_link_hash_entry *) h;
3655 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3656 if (ent->addend == rel->r_addend
3657 && ent->owner == abfd
3658 && ent->tls_type == tls_type)
3659 break;
3660 if (ent == NULL)
3661 {
3662 bfd_size_type amt = sizeof (*ent);
3663 ent = bfd_alloc (abfd, amt);
3664 if (ent == NULL)
3665 return FALSE;
3666 ent->next = eh->elf.got.glist;
3667 ent->addend = rel->r_addend;
3668 ent->owner = abfd;
3669 ent->tls_type = tls_type;
3670 ent->got.refcount = 0;
3671 eh->elf.got.glist = ent;
3672 }
3673 ent->got.refcount += 1;
3674 eh->tls_mask |= tls_type;
3675 }
3676 else
3677 /* This is a global offset table entry for a local symbol. */
3678 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3679 rel->r_addend, tls_type))
3680 return FALSE;
3681 break;
3682
3683 case R_PPC64_PLT16_HA:
3684 case R_PPC64_PLT16_HI:
3685 case R_PPC64_PLT16_LO:
3686 case R_PPC64_PLT32:
3687 case R_PPC64_PLT64:
3688 /* This symbol requires a procedure linkage table entry. We
3689 actually build the entry in adjust_dynamic_symbol,
3690 because this might be a case of linking PIC code without
3691 linking in any dynamic objects, in which case we don't
3692 need to generate a procedure linkage table after all. */
3693 if (h == NULL)
3694 {
3695 /* It does not make sense to have a procedure linkage
3696 table entry for a local symbol. */
3697 bfd_set_error (bfd_error_bad_value);
3698 return FALSE;
3699 }
3700 else
3701 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3702 rel->r_addend))
3703 return FALSE;
3704 break;
3705
3706 /* The following relocations don't need to propagate the
3707 relocation if linking a shared object since they are
3708 section relative. */
3709 case R_PPC64_SECTOFF:
3710 case R_PPC64_SECTOFF_LO:
3711 case R_PPC64_SECTOFF_HI:
3712 case R_PPC64_SECTOFF_HA:
3713 case R_PPC64_SECTOFF_DS:
3714 case R_PPC64_SECTOFF_LO_DS:
3715 case R_PPC64_DTPREL16:
3716 case R_PPC64_DTPREL16_LO:
3717 case R_PPC64_DTPREL16_HI:
3718 case R_PPC64_DTPREL16_HA:
3719 case R_PPC64_DTPREL16_DS:
3720 case R_PPC64_DTPREL16_LO_DS:
3721 case R_PPC64_DTPREL16_HIGHER:
3722 case R_PPC64_DTPREL16_HIGHERA:
3723 case R_PPC64_DTPREL16_HIGHEST:
3724 case R_PPC64_DTPREL16_HIGHESTA:
3725 break;
3726
3727 /* Nor do these. */
3728 case R_PPC64_TOC16:
3729 case R_PPC64_TOC16_LO:
3730 case R_PPC64_TOC16_HI:
3731 case R_PPC64_TOC16_HA:
3732 case R_PPC64_TOC16_DS:
3733 case R_PPC64_TOC16_LO_DS:
3734 sec->has_gp_reloc = 1;
3735 break;
3736
3737 /* This relocation describes the C++ object vtable hierarchy.
3738 Reconstruct it for later use during GC. */
3739 case R_PPC64_GNU_VTINHERIT:
3740 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3741 return FALSE;
3742 break;
3743
3744 /* This relocation describes which C++ vtable entries are actually
3745 used. Record for later use during GC. */
3746 case R_PPC64_GNU_VTENTRY:
3747 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3748 return FALSE;
3749 break;
3750
3751 case R_PPC64_REL14:
3752 case R_PPC64_REL14_BRTAKEN:
3753 case R_PPC64_REL14_BRNTAKEN:
3754 htab->has_14bit_branch = 1;
3755 /* Fall through. */
3756
3757 case R_PPC64_REL24:
3758 if (h != NULL
3759 && h->root.root.string[0] == '.'
3760 && h->root.root.string[1] != 0)
3761 {
3762 /* We may need a .plt entry if the function this reloc
3763 refers to is in a shared lib. */
3764 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3765 rel->r_addend))
3766 return FALSE;
3767 if (h == htab->tls_get_addr)
3768 sec->has_tls_reloc = 1;
3769 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3770 == 0)
3771 && (h->root.root.string[15] == 0
3772 || h->root.root.string[15] == '@'))
3773 {
3774 htab->tls_get_addr = h;
3775 sec->has_tls_reloc = 1;
3776 }
3777 }
3778 break;
3779
3780 case R_PPC64_TPREL64:
3781 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3782 if (info->shared)
3783 info->flags |= DF_STATIC_TLS;
3784 goto dotlstoc;
3785
3786 case R_PPC64_DTPMOD64:
3787 if (rel + 1 < rel_end
3788 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3789 && rel[1].r_offset == rel->r_offset + 8)
3790 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3791 else
3792 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3793 goto dotlstoc;
3794
3795 case R_PPC64_DTPREL64:
3796 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3797 if (rel != relocs
3798 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3799 && rel[-1].r_offset == rel->r_offset - 8)
3800 /* This is the second reloc of a dtpmod, dtprel pair.
3801 Don't mark with TLS_DTPREL. */
3802 goto dodyn;
3803
3804 dotlstoc:
3805 sec->has_tls_reloc = 1;
3806 if (h != NULL)
3807 {
3808 struct ppc_link_hash_entry *eh;
3809 eh = (struct ppc_link_hash_entry *) h;
3810 eh->tls_mask |= tls_type;
3811 }
3812 else
3813 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3814 rel->r_addend, tls_type))
3815 return FALSE;
3816
3817 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3818 {
3819 /* One extra to simplify get_tls_mask. */
3820 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3821 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3822 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3823 return FALSE;
3824 }
3825 BFD_ASSERT (rel->r_offset % 8 == 0);
3826 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3827
3828 /* Mark the second slot of a GD or LD entry.
3829 -1 to indicate GD and -2 to indicate LD. */
3830 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3831 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3832 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3833 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3834 goto dodyn;
3835
3836 case R_PPC64_TPREL16:
3837 case R_PPC64_TPREL16_LO:
3838 case R_PPC64_TPREL16_HI:
3839 case R_PPC64_TPREL16_HA:
3840 case R_PPC64_TPREL16_DS:
3841 case R_PPC64_TPREL16_LO_DS:
3842 case R_PPC64_TPREL16_HIGHER:
3843 case R_PPC64_TPREL16_HIGHERA:
3844 case R_PPC64_TPREL16_HIGHEST:
3845 case R_PPC64_TPREL16_HIGHESTA:
3846 if (info->shared)
3847 {
3848 info->flags |= DF_STATIC_TLS;
3849 goto dodyn;
3850 }
3851 break;
3852
3853 case R_PPC64_ADDR64:
3854 if (opd_sym_map != NULL
3855 && h != NULL
3856 && h->root.root.string[0] == '.'
3857 && h->root.root.string[1] != 0)
3858 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3859
3860 if (opd_sym_map != NULL
3861 && h == NULL
3862 && rel + 1 < rel_end
3863 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3864 {
3865 asection *s;
3866
3867 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3868 r_symndx);
3869 if (s == NULL)
3870 return FALSE;
3871 else if (s != sec)
3872 opd_sym_map[rel->r_offset / 24] = s;
3873 }
3874 /* Fall through. */
3875
3876 case R_PPC64_REL30:
3877 case R_PPC64_REL32:
3878 case R_PPC64_REL64:
3879 case R_PPC64_ADDR14:
3880 case R_PPC64_ADDR14_BRNTAKEN:
3881 case R_PPC64_ADDR14_BRTAKEN:
3882 case R_PPC64_ADDR16:
3883 case R_PPC64_ADDR16_DS:
3884 case R_PPC64_ADDR16_HA:
3885 case R_PPC64_ADDR16_HI:
3886 case R_PPC64_ADDR16_HIGHER:
3887 case R_PPC64_ADDR16_HIGHERA:
3888 case R_PPC64_ADDR16_HIGHEST:
3889 case R_PPC64_ADDR16_HIGHESTA:
3890 case R_PPC64_ADDR16_LO:
3891 case R_PPC64_ADDR16_LO_DS:
3892 case R_PPC64_ADDR24:
3893 case R_PPC64_ADDR32:
3894 case R_PPC64_UADDR16:
3895 case R_PPC64_UADDR32:
3896 case R_PPC64_UADDR64:
3897 case R_PPC64_TOC:
3898 if (h != NULL && !info->shared)
3899 /* We may need a copy reloc. */
3900 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3901
3902 /* Don't propagate .opd relocs. */
3903 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3904 break;
3905
3906 /* Don't propagate relocs that the dynamic linker won't relocate. */
3907 if ((sec->flags & SEC_ALLOC) == 0)
3908 break;
3909
3910 /* If we are creating a shared library, and this is a reloc
3911 against a global symbol, or a non PC relative reloc
3912 against a local symbol, then we need to copy the reloc
3913 into the shared library. However, if we are linking with
3914 -Bsymbolic, we do not need to copy a reloc against a
3915 global symbol which is defined in an object we are
3916 including in the link (i.e., DEF_REGULAR is set). At
3917 this point we have not seen all the input files, so it is
3918 possible that DEF_REGULAR is not set now but will be set
3919 later (it is never cleared). In case of a weak definition,
3920 DEF_REGULAR may be cleared later by a strong definition in
3921 a shared library. We account for that possibility below by
3922 storing information in the dyn_relocs field of the hash
3923 table entry. A similar situation occurs when creating
3924 shared libraries and symbol visibility changes render the
3925 symbol local.
3926
3927 If on the other hand, we are creating an executable, we
3928 may need to keep relocations for symbols satisfied by a
3929 dynamic library if we manage to avoid copy relocs for the
3930 symbol. */
3931 dodyn:
3932 if ((info->shared
3933 && (MUST_BE_DYN_RELOC (r_type)
3934 || (h != NULL
3935 && (! info->symbolic
3936 || h->root.type == bfd_link_hash_defweak
3937 || (h->elf_link_hash_flags
3938 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3939 || (ELIMINATE_COPY_RELOCS
3940 && !info->shared
3941 && h != NULL
3942 && (h->root.type == bfd_link_hash_defweak
3943 || (h->elf_link_hash_flags
3944 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3945 {
3946 struct ppc_dyn_relocs *p;
3947 struct ppc_dyn_relocs **head;
3948
3949 /* We must copy these reloc types into the output file.
3950 Create a reloc section in dynobj and make room for
3951 this reloc. */
3952 if (sreloc == NULL)
3953 {
3954 const char *name;
3955 bfd *dynobj;
3956
3957 name = (bfd_elf_string_from_elf_section
3958 (abfd,
3959 elf_elfheader (abfd)->e_shstrndx,
3960 elf_section_data (sec)->rel_hdr.sh_name));
3961 if (name == NULL)
3962 return FALSE;
3963
3964 if (strncmp (name, ".rela", 5) != 0
3965 || strcmp (bfd_get_section_name (abfd, sec),
3966 name + 5) != 0)
3967 {
3968 (*_bfd_error_handler)
3969 (_("%s: bad relocation section name `%s\'"),
3970 bfd_archive_filename (abfd), name);
3971 bfd_set_error (bfd_error_bad_value);
3972 }
3973
3974 dynobj = htab->elf.dynobj;
3975 sreloc = bfd_get_section_by_name (dynobj, name);
3976 if (sreloc == NULL)
3977 {
3978 flagword flags;
3979
3980 sreloc = bfd_make_section (dynobj, name);
3981 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3982 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3983 if ((sec->flags & SEC_ALLOC) != 0)
3984 flags |= SEC_ALLOC | SEC_LOAD;
3985 if (sreloc == NULL
3986 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3987 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
3988 return FALSE;
3989 }
3990 elf_section_data (sec)->sreloc = sreloc;
3991 }
3992
3993 /* If this is a global symbol, we count the number of
3994 relocations we need for this symbol. */
3995 if (h != NULL)
3996 {
3997 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
3998 }
3999 else
4000 {
4001 /* Track dynamic relocs needed for local syms too.
4002 We really need local syms available to do this
4003 easily. Oh well. */
4004
4005 asection *s;
4006 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4007 sec, r_symndx);
4008 if (s == NULL)
4009 return FALSE;
4010
4011 head = ((struct ppc_dyn_relocs **)
4012 &elf_section_data (s)->local_dynrel);
4013 }
4014
4015 p = *head;
4016 if (p == NULL || p->sec != sec)
4017 {
4018 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4019 if (p == NULL)
4020 return FALSE;
4021 p->next = *head;
4022 *head = p;
4023 p->sec = sec;
4024 p->count = 0;
4025 p->pc_count = 0;
4026 }
4027
4028 p->count += 1;
4029 if (!MUST_BE_DYN_RELOC (r_type))
4030 p->pc_count += 1;
4031 }
4032 break;
4033
4034 default:
4035 break;
4036 }
4037 }
4038
4039 return TRUE;
4040 }
4041
4042 /* Return the section that should be marked against GC for a given
4043 relocation. */
4044
4045 static asection *
4046 ppc64_elf_gc_mark_hook (asection *sec,
4047 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4048 Elf_Internal_Rela *rel,
4049 struct elf_link_hash_entry *h,
4050 Elf_Internal_Sym *sym)
4051 {
4052 asection *rsec = NULL;
4053
4054 if (h != NULL)
4055 {
4056 enum elf_ppc64_reloc_type r_type;
4057 struct ppc_link_hash_entry *fdh;
4058
4059 r_type = ELF64_R_TYPE (rel->r_info);
4060 switch (r_type)
4061 {
4062 case R_PPC64_GNU_VTINHERIT:
4063 case R_PPC64_GNU_VTENTRY:
4064 break;
4065
4066 default:
4067 switch (h->root.type)
4068 {
4069 case bfd_link_hash_defined:
4070 case bfd_link_hash_defweak:
4071 fdh = (struct ppc_link_hash_entry *) h;
4072
4073 /* Function descriptor syms cause the associated
4074 function code sym section to be marked. */
4075 if (fdh->is_func_descriptor)
4076 rsec = fdh->oh->root.u.def.section;
4077
4078 /* Function entry syms return NULL if they are in .opd
4079 and are not ._start (or others undefined on the ld
4080 command line). Thus we avoid marking all function
4081 sections, as all functions are referenced in .opd. */
4082 else if ((fdh->oh != NULL
4083 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4084 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4085 rsec = h->root.u.def.section;
4086 break;
4087
4088 case bfd_link_hash_common:
4089 rsec = h->root.u.c.p->section;
4090 break;
4091
4092 default:
4093 break;
4094 }
4095 }
4096 }
4097 else
4098 {
4099 asection **opd_sym_section;
4100
4101 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4102 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4103 if (opd_sym_section != NULL)
4104 rsec = opd_sym_section[sym->st_value / 24];
4105 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4106 rsec = NULL;
4107 }
4108
4109 return rsec;
4110 }
4111
4112 /* Update the .got, .plt. and dynamic reloc reference counts for the
4113 section being removed. */
4114
4115 static bfd_boolean
4116 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4117 asection *sec, const Elf_Internal_Rela *relocs)
4118 {
4119 struct ppc_link_hash_table *htab;
4120 Elf_Internal_Shdr *symtab_hdr;
4121 struct elf_link_hash_entry **sym_hashes;
4122 struct got_entry **local_got_ents;
4123 const Elf_Internal_Rela *rel, *relend;
4124
4125 elf_section_data (sec)->local_dynrel = NULL;
4126
4127 htab = ppc_hash_table (info);
4128 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4129 sym_hashes = elf_sym_hashes (abfd);
4130 local_got_ents = elf_local_got_ents (abfd);
4131
4132 relend = relocs + sec->reloc_count;
4133 for (rel = relocs; rel < relend; rel++)
4134 {
4135 unsigned long r_symndx;
4136 enum elf_ppc64_reloc_type r_type;
4137 struct elf_link_hash_entry *h = NULL;
4138 char tls_type = 0;
4139
4140 r_symndx = ELF64_R_SYM (rel->r_info);
4141 r_type = ELF64_R_TYPE (rel->r_info);
4142 if (r_symndx >= symtab_hdr->sh_info)
4143 {
4144 struct ppc_link_hash_entry *eh;
4145 struct ppc_dyn_relocs **pp;
4146 struct ppc_dyn_relocs *p;
4147
4148 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4149 eh = (struct ppc_link_hash_entry *) h;
4150
4151 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4152 if (p->sec == sec)
4153 {
4154 /* Everything must go for SEC. */
4155 *pp = p->next;
4156 break;
4157 }
4158 }
4159
4160 switch (r_type)
4161 {
4162 case R_PPC64_GOT_TLSLD16:
4163 case R_PPC64_GOT_TLSLD16_LO:
4164 case R_PPC64_GOT_TLSLD16_HI:
4165 case R_PPC64_GOT_TLSLD16_HA:
4166 ppc64_tlsld_got (abfd)->refcount -= 1;
4167 tls_type = TLS_TLS | TLS_LD;
4168 goto dogot;
4169
4170 case R_PPC64_GOT_TLSGD16:
4171 case R_PPC64_GOT_TLSGD16_LO:
4172 case R_PPC64_GOT_TLSGD16_HI:
4173 case R_PPC64_GOT_TLSGD16_HA:
4174 tls_type = TLS_TLS | TLS_GD;
4175 goto dogot;
4176
4177 case R_PPC64_GOT_TPREL16_DS:
4178 case R_PPC64_GOT_TPREL16_LO_DS:
4179 case R_PPC64_GOT_TPREL16_HI:
4180 case R_PPC64_GOT_TPREL16_HA:
4181 tls_type = TLS_TLS | TLS_TPREL;
4182 goto dogot;
4183
4184 case R_PPC64_GOT_DTPREL16_DS:
4185 case R_PPC64_GOT_DTPREL16_LO_DS:
4186 case R_PPC64_GOT_DTPREL16_HI:
4187 case R_PPC64_GOT_DTPREL16_HA:
4188 tls_type = TLS_TLS | TLS_DTPREL;
4189 goto dogot;
4190
4191 case R_PPC64_GOT16:
4192 case R_PPC64_GOT16_DS:
4193 case R_PPC64_GOT16_HA:
4194 case R_PPC64_GOT16_HI:
4195 case R_PPC64_GOT16_LO:
4196 case R_PPC64_GOT16_LO_DS:
4197 dogot:
4198 {
4199 struct got_entry *ent;
4200
4201 if (h != NULL)
4202 ent = h->got.glist;
4203 else
4204 ent = local_got_ents[r_symndx];
4205
4206 for (; ent != NULL; ent = ent->next)
4207 if (ent->addend == rel->r_addend
4208 && ent->owner == abfd
4209 && ent->tls_type == tls_type)
4210 break;
4211 if (ent == NULL)
4212 abort ();
4213 if (ent->got.refcount > 0)
4214 ent->got.refcount -= 1;
4215 }
4216 break;
4217
4218 case R_PPC64_PLT16_HA:
4219 case R_PPC64_PLT16_HI:
4220 case R_PPC64_PLT16_LO:
4221 case R_PPC64_PLT32:
4222 case R_PPC64_PLT64:
4223 case R_PPC64_REL14:
4224 case R_PPC64_REL14_BRNTAKEN:
4225 case R_PPC64_REL14_BRTAKEN:
4226 case R_PPC64_REL24:
4227 if (h != NULL)
4228 {
4229 struct plt_entry *ent;
4230
4231 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4232 if (ent->addend == rel->r_addend)
4233 break;
4234 if (ent == NULL)
4235 abort ();
4236 if (ent->plt.refcount > 0)
4237 ent->plt.refcount -= 1;
4238 }
4239 break;
4240
4241 default:
4242 break;
4243 }
4244 }
4245 return TRUE;
4246 }
4247
4248 /* Called via elf_link_hash_traverse to transfer dynamic linking
4249 information on function code symbol entries to their corresponding
4250 function descriptor symbol entries. */
4251 static bfd_boolean
4252 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4253 {
4254 struct bfd_link_info *info;
4255 struct ppc_link_hash_table *htab;
4256 struct plt_entry *ent;
4257 struct ppc_link_hash_entry *fh;
4258 struct ppc_link_hash_entry *fdh;
4259 bfd_boolean force_local;
4260
4261 fh = (struct ppc_link_hash_entry *) h;
4262 if (fh->elf.root.type == bfd_link_hash_indirect)
4263 return TRUE;
4264
4265 if (fh->elf.root.type == bfd_link_hash_warning)
4266 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4267
4268 info = inf;
4269 htab = ppc_hash_table (info);
4270
4271 /* If this is a function code symbol, transfer dynamic linking
4272 information to the function descriptor symbol. */
4273 if (!fh->is_func)
4274 return TRUE;
4275
4276 if (fh->elf.root.type == bfd_link_hash_undefweak
4277 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4278 htab->have_undefweak = TRUE;
4279
4280 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4281 if (ent->plt.refcount > 0)
4282 break;
4283 if (ent == NULL
4284 || fh->elf.root.root.string[0] != '.'
4285 || fh->elf.root.root.string[1] == '\0')
4286 return TRUE;
4287
4288 /* Find the corresponding function descriptor symbol. Create it
4289 as undefined if necessary. */
4290
4291 fdh = get_fdh (fh, htab);
4292 if (fdh != NULL)
4293 while (fdh->elf.root.type == bfd_link_hash_indirect
4294 || fdh->elf.root.type == bfd_link_hash_warning)
4295 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4296
4297 if (fdh == NULL
4298 && info->shared
4299 && (fh->elf.root.type == bfd_link_hash_undefined
4300 || fh->elf.root.type == bfd_link_hash_undefweak))
4301 {
4302 bfd *abfd;
4303 asymbol *newsym;
4304 struct bfd_link_hash_entry *bh;
4305
4306 abfd = fh->elf.root.u.undef.abfd;
4307 newsym = bfd_make_empty_symbol (abfd);
4308 newsym->name = fh->elf.root.root.string + 1;
4309 newsym->section = bfd_und_section_ptr;
4310 newsym->value = 0;
4311 newsym->flags = BSF_OBJECT;
4312 if (fh->elf.root.type == bfd_link_hash_undefweak)
4313 newsym->flags |= BSF_WEAK;
4314
4315 bh = &fdh->elf.root;
4316 if ( !(_bfd_generic_link_add_one_symbol
4317 (info, abfd, newsym->name, newsym->flags,
4318 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4319 {
4320 return FALSE;
4321 }
4322 fdh = (struct ppc_link_hash_entry *) bh;
4323 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4324 fdh->elf.size = 24;
4325 fdh->elf.type = STT_OBJECT;
4326 }
4327
4328 if (fdh != NULL
4329 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4330 && (info->shared
4331 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4332 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4333 || (fdh->elf.root.type == bfd_link_hash_undefweak
4334 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4335 {
4336 if (fdh->elf.dynindx == -1)
4337 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4338 return FALSE;
4339 fdh->elf.elf_link_hash_flags
4340 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4341 | ELF_LINK_HASH_REF_DYNAMIC
4342 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4343 | ELF_LINK_NON_GOT_REF));
4344 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4345 {
4346 fdh->elf.plt.plist = fh->elf.plt.plist;
4347 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4348 }
4349 fdh->is_func_descriptor = 1;
4350 fdh->oh = &fh->elf;
4351 fh->oh = &fdh->elf;
4352 }
4353
4354 /* Now that the info is on the function descriptor, clear the
4355 function code sym info. Any function code syms for which we
4356 don't have a definition in a regular file, we force local.
4357 This prevents a shared library from exporting syms that have
4358 been imported from another library. Function code syms that
4359 are really in the library we must leave global to prevent the
4360 linker dragging in a definition from a static library. */
4361 force_local
4362 = (info->shared
4363 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4364 || fdh == NULL
4365 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4366 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4367 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4368
4369 return TRUE;
4370 }
4371
4372 #define MIN_SAVE_FPR 14
4373 #define MAX_SAVE_FPR 31
4374
4375 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4376 this hook to a) provide some gcc support functions, and b) transfer
4377 dynamic linking information gathered so far on function code symbol
4378 entries, to their corresponding function descriptor symbol entries. */
4379 static bfd_boolean
4380 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4381 struct bfd_link_info *info)
4382 {
4383 struct ppc_link_hash_table *htab;
4384 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4385 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4386 unsigned int i;
4387 struct elf_link_hash_entry *h;
4388 bfd_byte *p;
4389 char sym[10];
4390
4391 htab = ppc_hash_table (info);
4392
4393 if (htab->sfpr == NULL)
4394 /* We don't have any relocs. */
4395 return TRUE;
4396
4397 /* First provide any missing ._savef* and ._restf* functions. */
4398 memcpy (sym, "._savef14", 10);
4399 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4400 {
4401 sym[7] = i / 10 + '0';
4402 sym[8] = i % 10 + '0';
4403 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4404 if (h != NULL
4405 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4406 {
4407 if (lowest_savef > i)
4408 lowest_savef = i;
4409 h->root.type = bfd_link_hash_defined;
4410 h->root.u.def.section = htab->sfpr;
4411 h->root.u.def.value = (i - lowest_savef) * 4;
4412 h->type = STT_FUNC;
4413 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4414 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4415 }
4416 }
4417
4418 memcpy (sym, "._restf14", 10);
4419 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4420 {
4421 sym[7] = i / 10 + '0';
4422 sym[8] = i % 10 + '0';
4423 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4424 if (h != NULL
4425 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4426 {
4427 if (lowest_restf > i)
4428 lowest_restf = i;
4429 h->root.type = bfd_link_hash_defined;
4430 h->root.u.def.section = htab->sfpr;
4431 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4432 + (i - lowest_restf) * 4);
4433 h->type = STT_FUNC;
4434 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4435 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4436 }
4437 }
4438
4439 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4440
4441 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4442 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4443
4444 if (htab->sfpr->_raw_size == 0)
4445 {
4446 if (!htab->have_undefweak)
4447 {
4448 _bfd_strip_section_from_output (info, htab->sfpr);
4449 return TRUE;
4450 }
4451
4452 htab->sfpr->_raw_size = 4;
4453 }
4454
4455 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4456 if (p == NULL)
4457 return FALSE;
4458 htab->sfpr->contents = p;
4459
4460 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4461 {
4462 unsigned int fpr = i << 21;
4463 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4464 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4465 p += 4;
4466 }
4467 if (lowest_savef <= MAX_SAVE_FPR)
4468 {
4469 bfd_put_32 (htab->elf.dynobj, BLR, p);
4470 p += 4;
4471 }
4472
4473 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4474 {
4475 unsigned int fpr = i << 21;
4476 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4477 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4478 p += 4;
4479 }
4480 if (lowest_restf <= MAX_SAVE_FPR
4481 || htab->sfpr->_raw_size == 4)
4482 {
4483 bfd_put_32 (htab->elf.dynobj, BLR, p);
4484 }
4485
4486 return TRUE;
4487 }
4488
4489 /* Adjust a symbol defined by a dynamic object and referenced by a
4490 regular object. The current definition is in some section of the
4491 dynamic object, but we're not including those sections. We have to
4492 change the definition to something the rest of the link can
4493 understand. */
4494
4495 static bfd_boolean
4496 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4497 struct elf_link_hash_entry *h)
4498 {
4499 struct ppc_link_hash_table *htab;
4500 asection *s;
4501 unsigned int power_of_two;
4502
4503 htab = ppc_hash_table (info);
4504
4505 /* Deal with function syms. */
4506 if (h->type == STT_FUNC
4507 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4508 {
4509 /* Clear procedure linkage table information for any symbol that
4510 won't need a .plt entry. */
4511 struct plt_entry *ent;
4512 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4513 if (ent->plt.refcount > 0)
4514 break;
4515 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4516 || ent == NULL
4517 || SYMBOL_CALLS_LOCAL (info, h)
4518 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4519 && h->root.type == bfd_link_hash_undefweak))
4520 {
4521 h->plt.plist = NULL;
4522 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4523 }
4524 }
4525 else
4526 h->plt.plist = NULL;
4527
4528 /* If this is a weak symbol, and there is a real definition, the
4529 processor independent code will have arranged for us to see the
4530 real definition first, and we can just use the same value. */
4531 if (h->weakdef != NULL)
4532 {
4533 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4534 || h->weakdef->root.type == bfd_link_hash_defweak);
4535 h->root.u.def.section = h->weakdef->root.u.def.section;
4536 h->root.u.def.value = h->weakdef->root.u.def.value;
4537 if (ELIMINATE_COPY_RELOCS)
4538 h->elf_link_hash_flags
4539 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4540 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4541 return TRUE;
4542 }
4543
4544 /* If we are creating a shared library, we must presume that the
4545 only references to the symbol are via the global offset table.
4546 For such cases we need not do anything here; the relocations will
4547 be handled correctly by relocate_section. */
4548 if (info->shared)
4549 return TRUE;
4550
4551 /* If there are no references to this symbol that do not use the
4552 GOT, we don't need to generate a copy reloc. */
4553 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4554 return TRUE;
4555
4556 if (ELIMINATE_COPY_RELOCS)
4557 {
4558 struct ppc_link_hash_entry * eh;
4559 struct ppc_dyn_relocs *p;
4560
4561 eh = (struct ppc_link_hash_entry *) h;
4562 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4563 {
4564 s = p->sec->output_section;
4565 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4566 break;
4567 }
4568
4569 /* If we didn't find any dynamic relocs in read-only sections, then
4570 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4571 if (p == NULL)
4572 {
4573 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4574 return TRUE;
4575 }
4576 }
4577
4578 if (h->plt.plist != NULL)
4579 {
4580 /* We should never get here, but unfortunately there are versions
4581 of gcc out there that improperly (for this ABI) put initialized
4582 function pointers, vtable refs and suchlike in read-only
4583 sections. Allow them to proceed, but warn that this might
4584 break at runtime. */
4585 (*_bfd_error_handler)
4586 (_("copy reloc against `%s' requires lazy plt linking; "
4587 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4588 h->root.root.string);
4589 }
4590
4591 /* This is a reference to a symbol defined by a dynamic object which
4592 is not a function. */
4593
4594 /* We must allocate the symbol in our .dynbss section, which will
4595 become part of the .bss section of the executable. There will be
4596 an entry for this symbol in the .dynsym section. The dynamic
4597 object will contain position independent code, so all references
4598 from the dynamic object to this symbol will go through the global
4599 offset table. The dynamic linker will use the .dynsym entry to
4600 determine the address it must put in the global offset table, so
4601 both the dynamic object and the regular object will refer to the
4602 same memory location for the variable. */
4603
4604 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4605 to copy the initial value out of the dynamic object and into the
4606 runtime process image. We need to remember the offset into the
4607 .rela.bss section we are going to use. */
4608 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4609 {
4610 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4611 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4612 }
4613
4614 /* We need to figure out the alignment required for this symbol. I
4615 have no idea how ELF linkers handle this. */
4616 power_of_two = bfd_log2 (h->size);
4617 if (power_of_two > 4)
4618 power_of_two = 4;
4619
4620 /* Apply the required alignment. */
4621 s = htab->dynbss;
4622 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4623 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4624 {
4625 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4626 return FALSE;
4627 }
4628
4629 /* Define the symbol as being at this point in the section. */
4630 h->root.u.def.section = s;
4631 h->root.u.def.value = s->_raw_size;
4632
4633 /* Increment the section size to make room for the symbol. */
4634 s->_raw_size += h->size;
4635
4636 return TRUE;
4637 }
4638
4639 /* If given a function descriptor symbol, hide both the function code
4640 sym and the descriptor. */
4641 static void
4642 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4643 struct elf_link_hash_entry *h,
4644 bfd_boolean force_local)
4645 {
4646 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4647
4648 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4649 {
4650 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4651
4652 if (fh == NULL)
4653 {
4654 const char *p, *q;
4655 struct ppc_link_hash_table *htab;
4656 char save;
4657
4658 /* We aren't supposed to use alloca in BFD because on
4659 systems which do not have alloca the version in libiberty
4660 calls xmalloc, which might cause the program to crash
4661 when it runs out of memory. This function doesn't have a
4662 return status, so there's no way to gracefully return an
4663 error. So cheat. We know that string[-1] can be safely
4664 dereferenced; It's either a string in an ELF string
4665 table, or allocated in an objalloc structure. */
4666
4667 p = h->root.root.string - 1;
4668 save = *p;
4669 *(char *) p = '.';
4670 htab = ppc_hash_table (info);
4671 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4672 *(char *) p = save;
4673
4674 /* Unfortunately, if it so happens that the string we were
4675 looking for was allocated immediately before this string,
4676 then we overwrote the string terminator. That's the only
4677 reason the lookup should fail. */
4678 if (fh == NULL)
4679 {
4680 q = h->root.root.string + strlen (h->root.root.string);
4681 while (q >= h->root.root.string && *q == *p)
4682 --q, --p;
4683 if (q < h->root.root.string && *p == '.')
4684 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4685 }
4686 if (fh != NULL)
4687 {
4688 ((struct ppc_link_hash_entry *) h)->oh = fh;
4689 ((struct ppc_link_hash_entry *) fh)->oh = h;
4690 }
4691 }
4692 if (fh != NULL)
4693 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4694 }
4695 }
4696
4697 static bfd_boolean
4698 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4699 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4700 unsigned long r_symndx, bfd *ibfd)
4701 {
4702 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4703
4704 if (r_symndx >= symtab_hdr->sh_info)
4705 {
4706 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4707 struct elf_link_hash_entry *h;
4708
4709 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4710 while (h->root.type == bfd_link_hash_indirect
4711 || h->root.type == bfd_link_hash_warning)
4712 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4713
4714 if (hp != NULL)
4715 *hp = h;
4716
4717 if (symp != NULL)
4718 *symp = NULL;
4719
4720 if (symsecp != NULL)
4721 {
4722 asection *symsec = NULL;
4723 if (h->root.type == bfd_link_hash_defined
4724 || h->root.type == bfd_link_hash_defweak)
4725 symsec = h->root.u.def.section;
4726 *symsecp = symsec;
4727 }
4728
4729 if (tls_maskp != NULL)
4730 {
4731 struct ppc_link_hash_entry *eh;
4732
4733 eh = (struct ppc_link_hash_entry *) h;
4734 *tls_maskp = &eh->tls_mask;
4735 }
4736 }
4737 else
4738 {
4739 Elf_Internal_Sym *sym;
4740 Elf_Internal_Sym *locsyms = *locsymsp;
4741
4742 if (locsyms == NULL)
4743 {
4744 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4745 if (locsyms == NULL)
4746 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4747 symtab_hdr->sh_info,
4748 0, NULL, NULL, NULL);
4749 if (locsyms == NULL)
4750 return FALSE;
4751 *locsymsp = locsyms;
4752 }
4753 sym = locsyms + r_symndx;
4754
4755 if (hp != NULL)
4756 *hp = NULL;
4757
4758 if (symp != NULL)
4759 *symp = sym;
4760
4761 if (symsecp != NULL)
4762 {
4763 asection *symsec = NULL;
4764 if ((sym->st_shndx != SHN_UNDEF
4765 && sym->st_shndx < SHN_LORESERVE)
4766 || sym->st_shndx > SHN_HIRESERVE)
4767 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4768 *symsecp = symsec;
4769 }
4770
4771 if (tls_maskp != NULL)
4772 {
4773 struct got_entry **lgot_ents;
4774 char *tls_mask;
4775
4776 tls_mask = NULL;
4777 lgot_ents = elf_local_got_ents (ibfd);
4778 if (lgot_ents != NULL)
4779 {
4780 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4781 tls_mask = &lgot_masks[r_symndx];
4782 }
4783 *tls_maskp = tls_mask;
4784 }
4785 }
4786 return TRUE;
4787 }
4788
4789 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4790 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4791 type suitable for optimization, and 1 otherwise. */
4792
4793 static int
4794 get_tls_mask (char **tls_maskp, Elf_Internal_Sym **locsymsp,
4795 const Elf_Internal_Rela *rel, bfd *ibfd)
4796 {
4797 unsigned long r_symndx;
4798 unsigned int next_r;
4799 struct elf_link_hash_entry *h;
4800 Elf_Internal_Sym *sym;
4801 asection *sec;
4802 bfd_vma off;
4803
4804 r_symndx = ELF64_R_SYM (rel->r_info);
4805 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4806 return 0;
4807
4808 if ((*tls_maskp != NULL && **tls_maskp != 0)
4809 || sec == NULL
4810 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4811 return 1;
4812
4813 /* Look inside a TOC section too. */
4814 if (h != NULL)
4815 {
4816 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4817 off = h->root.u.def.value;
4818 }
4819 else
4820 off = sym->st_value;
4821 off += rel->r_addend;
4822 BFD_ASSERT (off % 8 == 0);
4823 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4824 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4825 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4826 return 0;
4827 if (h == NULL
4828 || h->root.type == bfd_link_hash_defined
4829 || h->root.type == bfd_link_hash_defweak)
4830 {
4831 if (next_r == (unsigned) -1)
4832 return 2;
4833 if (next_r == (unsigned) -2
4834 && (h == NULL
4835 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4836 return 3;
4837 }
4838 return 1;
4839 }
4840
4841 bfd_boolean
4842 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4843 {
4844 bfd *ibfd;
4845
4846 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4847 {
4848 asection *sec;
4849 Elf_Internal_Rela *relstart, *rel, *relend;
4850 Elf_Internal_Shdr *symtab_hdr;
4851 Elf_Internal_Sym *local_syms;
4852 struct elf_link_hash_entry **sym_hashes;
4853 bfd_vma offset;
4854 bfd_size_type amt;
4855 long *adjust;
4856 bfd_boolean need_edit;
4857
4858 sec = bfd_get_section_by_name (ibfd, ".opd");
4859 if (sec == NULL)
4860 continue;
4861
4862 amt = sec->_raw_size * sizeof (long) / 24;
4863 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4864 if (adjust == NULL)
4865 {
4866 /* Must be a ld -r link. ie. check_relocs hasn't been
4867 called. */
4868 adjust = bfd_zalloc (obfd, amt);
4869 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4870 }
4871 memset (adjust, 0, amt);
4872
4873 if (sec->output_section == bfd_abs_section_ptr)
4874 continue;
4875
4876 /* Look through the section relocs. */
4877 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4878 continue;
4879
4880 local_syms = NULL;
4881 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4882 sym_hashes = elf_sym_hashes (ibfd);
4883
4884 /* Read the relocations. */
4885 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4886 info->keep_memory);
4887 if (relstart == NULL)
4888 return FALSE;
4889
4890 /* First run through the relocs to check they are sane, and to
4891 determine whether we need to edit this opd section. */
4892 need_edit = FALSE;
4893 offset = 0;
4894 relend = relstart + sec->reloc_count;
4895 for (rel = relstart; rel < relend; )
4896 {
4897 enum elf_ppc64_reloc_type r_type;
4898 unsigned long r_symndx;
4899 asection *sym_sec;
4900 struct elf_link_hash_entry *h;
4901 Elf_Internal_Sym *sym;
4902
4903 /* .opd contains a regular array of 24 byte entries. We're
4904 only interested in the reloc pointing to a function entry
4905 point. */
4906 if (rel->r_offset != offset
4907 || rel + 1 >= relend
4908 || (rel + 1)->r_offset != offset + 8)
4909 {
4910 /* If someone messes with .opd alignment then after a
4911 "ld -r" we might have padding in the middle of .opd.
4912 Also, there's nothing to prevent someone putting
4913 something silly in .opd with the assembler. No .opd
4914 optimization for them! */
4915 (*_bfd_error_handler)
4916 (_("%s: .opd is not a regular array of opd entries"),
4917 bfd_archive_filename (ibfd));
4918 need_edit = FALSE;
4919 break;
4920 }
4921
4922 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
4923 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
4924 {
4925 (*_bfd_error_handler)
4926 (_("%s: unexpected reloc type %u in .opd section"),
4927 bfd_archive_filename (ibfd), r_type);
4928 need_edit = FALSE;
4929 break;
4930 }
4931
4932 r_symndx = ELF64_R_SYM (rel->r_info);
4933 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
4934 r_symndx, ibfd))
4935 goto error_ret;
4936
4937 if (sym_sec == NULL || sym_sec->owner == NULL)
4938 {
4939 const char *sym_name;
4940 if (h != NULL)
4941 sym_name = h->root.root.string;
4942 else
4943 sym_name = bfd_elf_local_sym_name (ibfd, sym);
4944
4945 (*_bfd_error_handler)
4946 (_("%s: undefined sym `%s' in .opd section"),
4947 bfd_archive_filename (ibfd),
4948 sym_name);
4949 need_edit = FALSE;
4950 break;
4951 }
4952
4953 /* opd entries are always for functions defined in the
4954 current input bfd. If the symbol isn't defined in the
4955 input bfd, then we won't be using the function in this
4956 bfd; It must be defined in a linkonce section in another
4957 bfd, or is weak. It's also possible that we are
4958 discarding the function due to a linker script /DISCARD/,
4959 which we test for via the output_section. */
4960 if (sym_sec->owner != ibfd
4961 || sym_sec->output_section == bfd_abs_section_ptr)
4962 need_edit = TRUE;
4963
4964 offset += 24;
4965 rel += 2;
4966 /* Allow for the possibility of a reloc on the third word. */
4967 if (rel < relend
4968 && rel->r_offset == offset - 8)
4969 rel += 1;
4970 }
4971
4972 if (need_edit)
4973 {
4974 Elf_Internal_Rela *write_rel;
4975 bfd_byte *rptr, *wptr;
4976 bfd_boolean skip;
4977
4978 /* This seems a waste of time as input .opd sections are all
4979 zeros as generated by gcc, but I suppose there's no reason
4980 this will always be so. We might start putting something in
4981 the third word of .opd entries. */
4982 if ((sec->flags & SEC_IN_MEMORY) == 0)
4983 {
4984 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
4985 if (loc == NULL
4986 || !bfd_get_section_contents (ibfd, sec, loc, 0,
4987 sec->_raw_size))
4988 {
4989 error_ret:
4990 if (local_syms != NULL
4991 && symtab_hdr->contents != (unsigned char *) local_syms)
4992 free (local_syms);
4993 if (elf_section_data (sec)->relocs != relstart)
4994 free (relstart);
4995 return FALSE;
4996 }
4997 sec->contents = loc;
4998 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
4999 }
5000
5001 elf_section_data (sec)->relocs = relstart;
5002
5003 wptr = sec->contents;
5004 rptr = sec->contents;
5005 write_rel = relstart;
5006 skip = FALSE;
5007 offset = 0;
5008 for (rel = relstart; rel < relend; rel++)
5009 {
5010 unsigned long r_symndx;
5011 asection *sym_sec;
5012 struct elf_link_hash_entry *h;
5013 Elf_Internal_Sym *sym;
5014
5015 r_symndx = ELF64_R_SYM (rel->r_info);
5016 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5017 r_symndx, ibfd))
5018 goto error_ret;
5019
5020 if (rel->r_offset == offset)
5021 {
5022 struct ppc_link_hash_entry *fdh = NULL;
5023 if (h != NULL)
5024 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5025 ppc_hash_table (info));
5026
5027 skip = (sym_sec->owner != ibfd
5028 || sym_sec->output_section == bfd_abs_section_ptr);
5029 if (skip)
5030 {
5031 if (h != NULL && sym_sec->owner == ibfd)
5032 {
5033 /* Arrange for the function descriptor sym
5034 to be dropped. */
5035 fdh->elf.root.u.def.value = 0;
5036 fdh->elf.root.u.def.section = sym_sec;
5037 }
5038 }
5039 else
5040 {
5041 /* We'll be keeping this opd entry. */
5042
5043 if (h != NULL)
5044 {
5045 /* Redefine the function descriptor symbol
5046 to this location in the opd section.
5047 We've checked above that opd relocs are
5048 ordered. */
5049 fdh->elf.root.u.def.value = wptr - sec->contents;
5050 }
5051 else
5052 {
5053 /* Local syms are a bit tricky. We could
5054 tweak them as they can be cached, but
5055 we'd need to look through the local syms
5056 for the function descriptor sym which we
5057 don't have at the moment. So keep an
5058 array of adjustments. */
5059 adjust[rel->r_offset / 24] = wptr - rptr;
5060 }
5061
5062 if (wptr != rptr)
5063 memcpy (wptr, rptr, 24);
5064 wptr += 24;
5065 }
5066 rptr += 24;
5067 offset += 24;
5068 }
5069
5070 if (skip)
5071 {
5072 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5073 if (info->shared)
5074 {
5075 /* We won't be needing dynamic relocs here. */
5076 struct ppc_dyn_relocs **pp;
5077 struct ppc_dyn_relocs *p;
5078
5079 if (h != NULL)
5080 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5081 else if (sym_sec != NULL)
5082 pp = ((struct ppc_dyn_relocs **)
5083 &elf_section_data (sym_sec)->local_dynrel);
5084 else
5085 pp = ((struct ppc_dyn_relocs **)
5086 &elf_section_data (sec)->local_dynrel);
5087 while ((p = *pp) != NULL)
5088 {
5089 if (p->sec == sec)
5090 {
5091 p->count -= 1;
5092 if (p->count == 0)
5093 *pp = p->next;
5094 break;
5095 }
5096 pp = &p->next;
5097 }
5098 }
5099 }
5100 else
5101 {
5102 /* We need to adjust any reloc offsets to point to the
5103 new opd entries. While we're at it, we may as well
5104 remove redundant relocs. */
5105 rel->r_offset += wptr - rptr;
5106 if (write_rel != rel)
5107 memcpy (write_rel, rel, sizeof (*rel));
5108 ++write_rel;
5109 }
5110 }
5111
5112 sec->_cooked_size = wptr - sec->contents;
5113 sec->reloc_count = write_rel - relstart;
5114 /* Fudge the size too, as this is used later in
5115 elf_bfd_final_link if we are emitting relocs. */
5116 elf_section_data (sec)->rel_hdr.sh_size
5117 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5118 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5119 }
5120 else if (elf_section_data (sec)->relocs != relstart)
5121 free (relstart);
5122
5123 if (local_syms != NULL
5124 && symtab_hdr->contents != (unsigned char *) local_syms)
5125 {
5126 if (!info->keep_memory)
5127 free (local_syms);
5128 else
5129 symtab_hdr->contents = (unsigned char *) local_syms;
5130 }
5131 }
5132
5133 return TRUE;
5134 }
5135
5136 /* Set htab->tls_sec. */
5137
5138 bfd_boolean
5139 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5140 {
5141 asection *tls;
5142 struct ppc_link_hash_table *htab;
5143
5144 for (tls = obfd->sections; tls != NULL; tls = tls->next)
5145 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
5146 == (SEC_THREAD_LOCAL | SEC_LOAD))
5147 break;
5148
5149 htab = ppc_hash_table (info);
5150 htab->tls_sec = tls;
5151
5152 if (htab->tls_get_addr != NULL)
5153 {
5154 struct elf_link_hash_entry *h = htab->tls_get_addr;
5155
5156 while (h->root.type == bfd_link_hash_indirect
5157 || h->root.type == bfd_link_hash_warning)
5158 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5159
5160 htab->tls_get_addr = h;
5161 }
5162
5163 return tls != NULL;
5164 }
5165
5166 /* Run through all the TLS relocs looking for optimization
5167 opportunities. The linker has been hacked (see ppc64elf.em) to do
5168 a preliminary section layout so that we know the TLS segment
5169 offsets. We can't optimize earlier because some optimizations need
5170 to know the tp offset, and we need to optimize before allocating
5171 dynamic relocations. */
5172
5173 bfd_boolean
5174 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5175 {
5176 bfd *ibfd;
5177 asection *sec;
5178 struct ppc_link_hash_table *htab;
5179
5180 if (info->relocatable || info->shared)
5181 return TRUE;
5182
5183 htab = ppc_hash_table (info);
5184 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5185 {
5186 Elf_Internal_Sym *locsyms = NULL;
5187
5188 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5189 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5190 {
5191 Elf_Internal_Rela *relstart, *rel, *relend;
5192 int expecting_tls_get_addr;
5193
5194 /* Read the relocations. */
5195 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5196 info->keep_memory);
5197 if (relstart == NULL)
5198 return FALSE;
5199
5200 expecting_tls_get_addr = 0;
5201 relend = relstart + sec->reloc_count;
5202 for (rel = relstart; rel < relend; rel++)
5203 {
5204 enum elf_ppc64_reloc_type r_type;
5205 unsigned long r_symndx;
5206 struct elf_link_hash_entry *h;
5207 Elf_Internal_Sym *sym;
5208 asection *sym_sec;
5209 char *tls_mask;
5210 char tls_set, tls_clear, tls_type = 0;
5211 bfd_vma value;
5212 bfd_boolean ok_tprel, is_local;
5213
5214 r_symndx = ELF64_R_SYM (rel->r_info);
5215 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5216 r_symndx, ibfd))
5217 {
5218 err_free_rel:
5219 if (elf_section_data (sec)->relocs != relstart)
5220 free (relstart);
5221 if (locsyms != NULL
5222 && (elf_tdata (ibfd)->symtab_hdr.contents
5223 != (unsigned char *) locsyms))
5224 free (locsyms);
5225 return FALSE;
5226 }
5227
5228 if (h != NULL)
5229 {
5230 if (h->root.type != bfd_link_hash_defined
5231 && h->root.type != bfd_link_hash_defweak)
5232 continue;
5233 value = h->root.u.def.value;
5234 }
5235 else
5236 value = sym->st_value;
5237
5238 ok_tprel = FALSE;
5239 is_local = FALSE;
5240 if (h == NULL
5241 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5242 {
5243 is_local = TRUE;
5244 value += sym_sec->output_offset;
5245 value += sym_sec->output_section->vma;
5246 value -= htab->tls_sec->vma;
5247 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5248 < (bfd_vma) 1 << 32);
5249 }
5250
5251 r_type = ELF64_R_TYPE (rel->r_info);
5252 switch (r_type)
5253 {
5254 case R_PPC64_GOT_TLSLD16:
5255 case R_PPC64_GOT_TLSLD16_LO:
5256 case R_PPC64_GOT_TLSLD16_HI:
5257 case R_PPC64_GOT_TLSLD16_HA:
5258 /* These relocs should never be against a symbol
5259 defined in a shared lib. Leave them alone if
5260 that turns out to be the case. */
5261 ppc64_tlsld_got (ibfd)->refcount -= 1;
5262 if (!is_local)
5263 continue;
5264
5265 /* LD -> LE */
5266 tls_set = 0;
5267 tls_clear = TLS_LD;
5268 tls_type = TLS_TLS | TLS_LD;
5269 expecting_tls_get_addr = 1;
5270 break;
5271
5272 case R_PPC64_GOT_TLSGD16:
5273 case R_PPC64_GOT_TLSGD16_LO:
5274 case R_PPC64_GOT_TLSGD16_HI:
5275 case R_PPC64_GOT_TLSGD16_HA:
5276 if (ok_tprel)
5277 /* GD -> LE */
5278 tls_set = 0;
5279 else
5280 /* GD -> IE */
5281 tls_set = TLS_TLS | TLS_TPRELGD;
5282 tls_clear = TLS_GD;
5283 tls_type = TLS_TLS | TLS_GD;
5284 expecting_tls_get_addr = 1;
5285 break;
5286
5287 case R_PPC64_GOT_TPREL16_DS:
5288 case R_PPC64_GOT_TPREL16_LO_DS:
5289 case R_PPC64_GOT_TPREL16_HI:
5290 case R_PPC64_GOT_TPREL16_HA:
5291 expecting_tls_get_addr = 0;
5292 if (ok_tprel)
5293 {
5294 /* IE -> LE */
5295 tls_set = 0;
5296 tls_clear = TLS_TPREL;
5297 tls_type = TLS_TLS | TLS_TPREL;
5298 break;
5299 }
5300 else
5301 continue;
5302
5303 case R_PPC64_REL14:
5304 case R_PPC64_REL14_BRTAKEN:
5305 case R_PPC64_REL14_BRNTAKEN:
5306 case R_PPC64_REL24:
5307 if (h != NULL
5308 && h == htab->tls_get_addr)
5309 {
5310 if (!expecting_tls_get_addr
5311 && rel != relstart
5312 && ((ELF64_R_TYPE (rel[-1].r_info)
5313 == R_PPC64_TOC16)
5314 || (ELF64_R_TYPE (rel[-1].r_info)
5315 == R_PPC64_TOC16_LO)))
5316 {
5317 /* Check for toc tls entries. */
5318 char *toc_tls;
5319 int retval;
5320
5321 retval = get_tls_mask (&toc_tls, &locsyms,
5322 rel - 1, ibfd);
5323 if (retval == 0)
5324 goto err_free_rel;
5325 if (toc_tls != NULL)
5326 expecting_tls_get_addr = retval > 1;
5327 }
5328
5329 if (expecting_tls_get_addr)
5330 {
5331 struct plt_entry *ent;
5332 for (ent = h->plt.plist; ent; ent = ent->next)
5333 if (ent->addend == 0)
5334 {
5335 if (ent->plt.refcount > 0)
5336 ent->plt.refcount -= 1;
5337 break;
5338 }
5339 }
5340 }
5341 expecting_tls_get_addr = 0;
5342 continue;
5343
5344 case R_PPC64_TPREL64:
5345 expecting_tls_get_addr = 0;
5346 if (ok_tprel)
5347 {
5348 /* IE -> LE */
5349 tls_set = TLS_EXPLICIT;
5350 tls_clear = TLS_TPREL;
5351 break;
5352 }
5353 else
5354 continue;
5355
5356 case R_PPC64_DTPMOD64:
5357 expecting_tls_get_addr = 0;
5358 if (rel + 1 < relend
5359 && (rel[1].r_info
5360 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5361 && rel[1].r_offset == rel->r_offset + 8)
5362 {
5363 if (ok_tprel)
5364 /* GD -> LE */
5365 tls_set = TLS_EXPLICIT | TLS_GD;
5366 else
5367 /* GD -> IE */
5368 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5369 tls_clear = TLS_GD;
5370 }
5371 else
5372 {
5373 if (!is_local)
5374 continue;
5375
5376 /* LD -> LE */
5377 tls_set = TLS_EXPLICIT;
5378 tls_clear = TLS_LD;
5379 }
5380 break;
5381
5382 default:
5383 expecting_tls_get_addr = 0;
5384 continue;
5385 }
5386
5387 if ((tls_set & TLS_EXPLICIT) == 0)
5388 {
5389 struct got_entry *ent;
5390
5391 /* Adjust got entry for this reloc. */
5392 if (h != NULL)
5393 ent = h->got.glist;
5394 else
5395 ent = elf_local_got_ents (ibfd)[r_symndx];
5396
5397 for (; ent != NULL; ent = ent->next)
5398 if (ent->addend == rel->r_addend
5399 && ent->owner == ibfd
5400 && ent->tls_type == tls_type)
5401 break;
5402 if (ent == NULL)
5403 abort ();
5404
5405 if (tls_set == 0)
5406 {
5407 /* We managed to get rid of a got entry. */
5408 if (ent->got.refcount > 0)
5409 ent->got.refcount -= 1;
5410 }
5411 }
5412 else if (h != NULL)
5413 {
5414 struct ppc_link_hash_entry * eh;
5415 struct ppc_dyn_relocs **pp;
5416 struct ppc_dyn_relocs *p;
5417
5418 /* Adjust dynamic relocs. */
5419 eh = (struct ppc_link_hash_entry *) h;
5420 for (pp = &eh->dyn_relocs;
5421 (p = *pp) != NULL;
5422 pp = &p->next)
5423 if (p->sec == sec)
5424 {
5425 /* If we got rid of a DTPMOD/DTPREL reloc
5426 pair then we'll lose one or two dyn
5427 relocs. */
5428 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5429 p->count -= 1;
5430 p->count -= 1;
5431 if (p->count == 0)
5432 *pp = p->next;
5433 break;
5434 }
5435 }
5436
5437 *tls_mask |= tls_set;
5438 *tls_mask &= ~tls_clear;
5439 }
5440
5441 if (elf_section_data (sec)->relocs != relstart)
5442 free (relstart);
5443 }
5444
5445 if (locsyms != NULL
5446 && (elf_tdata (ibfd)->symtab_hdr.contents
5447 != (unsigned char *) locsyms))
5448 {
5449 if (!info->keep_memory)
5450 free (locsyms);
5451 else
5452 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5453 }
5454 }
5455 return TRUE;
5456 }
5457
5458 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5459 will be called from elflink.h. If elflink.h doesn't call our
5460 finish_dynamic_symbol routine, we'll need to do something about
5461 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5462 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5463 ((DYN) \
5464 && ((SHARED) \
5465 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5466 && ((H)->dynindx != -1 \
5467 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5468
5469 /* Allocate space in .plt, .got and associated reloc sections for
5470 dynamic relocs. */
5471
5472 static bfd_boolean
5473 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5474 {
5475 struct bfd_link_info *info;
5476 struct ppc_link_hash_table *htab;
5477 asection *s;
5478 struct ppc_link_hash_entry *eh;
5479 struct ppc_dyn_relocs *p;
5480 struct got_entry *gent;
5481
5482 if (h->root.type == bfd_link_hash_indirect)
5483 return TRUE;
5484
5485 if (h->root.type == bfd_link_hash_warning)
5486 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5487
5488 info = (struct bfd_link_info *) inf;
5489 htab = ppc_hash_table (info);
5490
5491 if (htab->elf.dynamic_sections_created
5492 && h->dynindx != -1
5493 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5494 {
5495 struct plt_entry *pent;
5496 bfd_boolean doneone = FALSE;
5497 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5498 if (pent->plt.refcount > 0)
5499 {
5500 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5501
5502 /* If this is the first .plt entry, make room for the special
5503 first entry. */
5504 s = htab->plt;
5505 if (s->_raw_size == 0)
5506 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5507
5508 pent->plt.offset = s->_raw_size;
5509
5510 /* Make room for this entry. */
5511 s->_raw_size += PLT_ENTRY_SIZE;
5512
5513 /* Make room for the .glink code. */
5514 s = htab->glink;
5515 if (s->_raw_size == 0)
5516 s->_raw_size += GLINK_CALL_STUB_SIZE;
5517 /* We need bigger stubs past index 32767. */
5518 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5519 s->_raw_size += 4;
5520 s->_raw_size += 2*4;
5521
5522 /* We also need to make an entry in the .rela.plt section. */
5523 s = htab->relplt;
5524 s->_raw_size += sizeof (Elf64_External_Rela);
5525 doneone = TRUE;
5526 }
5527 else
5528 pent->plt.offset = (bfd_vma) -1;
5529 if (!doneone)
5530 {
5531 h->plt.plist = NULL;
5532 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5533 }
5534 }
5535 else
5536 {
5537 h->plt.plist = NULL;
5538 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5539 }
5540
5541 eh = (struct ppc_link_hash_entry *) h;
5542 /* Run through the TLS GD got entries first if we're changing them
5543 to TPREL. */
5544 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5545 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5546 if (gent->got.refcount > 0
5547 && (gent->tls_type & TLS_GD) != 0)
5548 {
5549 /* This was a GD entry that has been converted to TPREL. If
5550 there happens to be a TPREL entry we can use that one. */
5551 struct got_entry *ent;
5552 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5553 if (ent->got.refcount > 0
5554 && (ent->tls_type & TLS_TPREL) != 0
5555 && ent->addend == gent->addend
5556 && ent->owner == gent->owner)
5557 {
5558 gent->got.refcount = 0;
5559 break;
5560 }
5561
5562 /* If not, then we'll be using our own TPREL entry. */
5563 if (gent->got.refcount != 0)
5564 gent->tls_type = TLS_TLS | TLS_TPREL;
5565 }
5566
5567 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5568 if (gent->got.refcount > 0)
5569 {
5570 bfd_boolean dyn;
5571
5572 /* Make sure this symbol is output as a dynamic symbol.
5573 Undefined weak syms won't yet be marked as dynamic,
5574 nor will all TLS symbols. */
5575 if (h->dynindx == -1
5576 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5577 {
5578 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5579 return FALSE;
5580 }
5581
5582 if ((gent->tls_type & TLS_LD) != 0
5583 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5584 {
5585 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5586 continue;
5587 }
5588
5589 s = ppc64_elf_tdata (gent->owner)->got;
5590 gent->got.offset = s->_raw_size;
5591 s->_raw_size
5592 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5593 dyn = htab->elf.dynamic_sections_created;
5594 if ((info->shared
5595 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5596 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5597 || h->root.type != bfd_link_hash_undefweak))
5598 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5599 += (gent->tls_type & eh->tls_mask & TLS_GD
5600 ? 2 * sizeof (Elf64_External_Rela)
5601 : sizeof (Elf64_External_Rela));
5602 }
5603 else
5604 gent->got.offset = (bfd_vma) -1;
5605
5606 if (eh->dyn_relocs == NULL)
5607 return TRUE;
5608
5609 /* In the shared -Bsymbolic case, discard space allocated for
5610 dynamic pc-relative relocs against symbols which turn out to be
5611 defined in regular objects. For the normal shared case, discard
5612 space for relocs that have become local due to symbol visibility
5613 changes. */
5614
5615 if (info->shared)
5616 {
5617 /* Relocs that use pc_count are those that appear on a call insn,
5618 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5619 generated via assembly. We want calls to protected symbols to
5620 resolve directly to the function rather than going via the plt.
5621 If people want function pointer comparisons to work as expected
5622 then they should avoid writing weird assembly. */
5623 if (SYMBOL_CALLS_LOCAL (info, h))
5624 {
5625 struct ppc_dyn_relocs **pp;
5626
5627 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5628 {
5629 p->count -= p->pc_count;
5630 p->pc_count = 0;
5631 if (p->count == 0)
5632 *pp = p->next;
5633 else
5634 pp = &p->next;
5635 }
5636 }
5637
5638 /* Also discard relocs on undefined weak syms with non-default
5639 visibility. */
5640 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5641 && h->root.type == bfd_link_hash_undefweak)
5642 eh->dyn_relocs = NULL;
5643 }
5644 else if (ELIMINATE_COPY_RELOCS)
5645 {
5646 /* For the non-shared case, discard space for relocs against
5647 symbols which turn out to need copy relocs or are not
5648 dynamic. */
5649
5650 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5651 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5652 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5653 {
5654 /* Make sure this symbol is output as a dynamic symbol.
5655 Undefined weak syms won't yet be marked as dynamic. */
5656 if (h->dynindx == -1
5657 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5658 {
5659 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5660 return FALSE;
5661 }
5662
5663 /* If that succeeded, we know we'll be keeping all the
5664 relocs. */
5665 if (h->dynindx != -1)
5666 goto keep;
5667 }
5668
5669 eh->dyn_relocs = NULL;
5670
5671 keep: ;
5672 }
5673
5674 /* Finally, allocate space. */
5675 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5676 {
5677 asection *sreloc = elf_section_data (p->sec)->sreloc;
5678 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5679 }
5680
5681 return TRUE;
5682 }
5683
5684 /* Find any dynamic relocs that apply to read-only sections. */
5685
5686 static bfd_boolean
5687 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5688 {
5689 struct ppc_link_hash_entry *eh;
5690 struct ppc_dyn_relocs *p;
5691
5692 if (h->root.type == bfd_link_hash_warning)
5693 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5694
5695 eh = (struct ppc_link_hash_entry *) h;
5696 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5697 {
5698 asection *s = p->sec->output_section;
5699
5700 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5701 {
5702 struct bfd_link_info *info = inf;
5703
5704 info->flags |= DF_TEXTREL;
5705
5706 /* Not an error, just cut short the traversal. */
5707 return FALSE;
5708 }
5709 }
5710 return TRUE;
5711 }
5712
5713 /* Set the sizes of the dynamic sections. */
5714
5715 static bfd_boolean
5716 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5717 struct bfd_link_info *info)
5718 {
5719 struct ppc_link_hash_table *htab;
5720 bfd *dynobj;
5721 asection *s;
5722 bfd_boolean relocs;
5723 bfd *ibfd;
5724
5725 htab = ppc_hash_table (info);
5726 dynobj = htab->elf.dynobj;
5727 if (dynobj == NULL)
5728 abort ();
5729
5730 if (htab->elf.dynamic_sections_created)
5731 {
5732 /* Set the contents of the .interp section to the interpreter. */
5733 if (info->executable)
5734 {
5735 s = bfd_get_section_by_name (dynobj, ".interp");
5736 if (s == NULL)
5737 abort ();
5738 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5739 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5740 }
5741 }
5742
5743 /* Set up .got offsets for local syms, and space for local dynamic
5744 relocs. */
5745 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5746 {
5747 struct got_entry **lgot_ents;
5748 struct got_entry **end_lgot_ents;
5749 char *lgot_masks;
5750 bfd_size_type locsymcount;
5751 Elf_Internal_Shdr *symtab_hdr;
5752 asection *srel;
5753
5754 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5755 continue;
5756
5757 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5758 {
5759 s = ppc64_elf_tdata (ibfd)->got;
5760 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5761 s->_raw_size += 16;
5762 if (info->shared)
5763 {
5764 srel = ppc64_elf_tdata (ibfd)->relgot;
5765 srel->_raw_size += sizeof (Elf64_External_Rela);
5766 }
5767 }
5768 else
5769 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5770
5771 for (s = ibfd->sections; s != NULL; s = s->next)
5772 {
5773 struct ppc_dyn_relocs *p;
5774
5775 for (p = *((struct ppc_dyn_relocs **)
5776 &elf_section_data (s)->local_dynrel);
5777 p != NULL;
5778 p = p->next)
5779 {
5780 if (!bfd_is_abs_section (p->sec)
5781 && bfd_is_abs_section (p->sec->output_section))
5782 {
5783 /* Input section has been discarded, either because
5784 it is a copy of a linkonce section or due to
5785 linker script /DISCARD/, so we'll be discarding
5786 the relocs too. */
5787 }
5788 else if (p->count != 0)
5789 {
5790 srel = elf_section_data (p->sec)->sreloc;
5791 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5792 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5793 info->flags |= DF_TEXTREL;
5794 }
5795 }
5796 }
5797
5798 lgot_ents = elf_local_got_ents (ibfd);
5799 if (!lgot_ents)
5800 continue;
5801
5802 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5803 locsymcount = symtab_hdr->sh_info;
5804 end_lgot_ents = lgot_ents + locsymcount;
5805 lgot_masks = (char *) end_lgot_ents;
5806 s = ppc64_elf_tdata (ibfd)->got;
5807 srel = ppc64_elf_tdata (ibfd)->relgot;
5808 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5809 {
5810 struct got_entry *ent;
5811
5812 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5813 if (ent->got.refcount > 0)
5814 {
5815 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5816 {
5817 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5818 {
5819 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5820 s->_raw_size += 16;
5821 if (info->shared)
5822 srel->_raw_size += sizeof (Elf64_External_Rela);
5823 }
5824 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5825 }
5826 else
5827 {
5828 ent->got.offset = s->_raw_size;
5829 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5830 {
5831 s->_raw_size += 16;
5832 if (info->shared)
5833 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5834 }
5835 else
5836 {
5837 s->_raw_size += 8;
5838 if (info->shared)
5839 srel->_raw_size += sizeof (Elf64_External_Rela);
5840 }
5841 }
5842 }
5843 else
5844 ent->got.offset = (bfd_vma) -1;
5845 }
5846 }
5847
5848 /* Allocate global sym .plt and .got entries, and space for global
5849 sym dynamic relocs. */
5850 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5851
5852 /* We now have determined the sizes of the various dynamic sections.
5853 Allocate memory for them. */
5854 relocs = FALSE;
5855 for (s = dynobj->sections; s != NULL; s = s->next)
5856 {
5857 if ((s->flags & SEC_LINKER_CREATED) == 0)
5858 continue;
5859
5860 /* Reset _cooked_size since prelim layout will set it wrongly,
5861 and a non-zero _cooked_size sticks. */
5862 s->_cooked_size = 0;
5863
5864 if (s == htab->brlt || s == htab->relbrlt)
5865 /* These haven't been allocated yet; don't strip. */
5866 continue;
5867 else if (s == htab->got
5868 || s == htab->plt
5869 || s == htab->glink)
5870 {
5871 /* Strip this section if we don't need it; see the
5872 comment below. */
5873 }
5874 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5875 {
5876 if (s->_raw_size == 0)
5877 {
5878 /* If we don't need this section, strip it from the
5879 output file. This is mostly to handle .rela.bss and
5880 .rela.plt. We must create both sections in
5881 create_dynamic_sections, because they must be created
5882 before the linker maps input sections to output
5883 sections. The linker does that before
5884 adjust_dynamic_symbol is called, and it is that
5885 function which decides whether anything needs to go
5886 into these sections. */
5887 }
5888 else
5889 {
5890 if (s != htab->relplt)
5891 relocs = TRUE;
5892
5893 /* We use the reloc_count field as a counter if we need
5894 to copy relocs into the output file. */
5895 s->reloc_count = 0;
5896 }
5897 }
5898 else
5899 {
5900 /* It's not one of our sections, so don't allocate space. */
5901 continue;
5902 }
5903
5904 if (s->_raw_size == 0)
5905 {
5906 _bfd_strip_section_from_output (info, s);
5907 continue;
5908 }
5909
5910 /* .plt is in the bss section. We don't initialise it. */
5911 if ((s->flags & SEC_LOAD) == 0)
5912 continue;
5913
5914 /* Allocate memory for the section contents. We use bfd_zalloc
5915 here in case unused entries are not reclaimed before the
5916 section's contents are written out. This should not happen,
5917 but this way if it does we get a R_PPC64_NONE reloc in .rela
5918 sections instead of garbage.
5919 We also rely on the section contents being zero when writing
5920 the GOT. */
5921 s->contents = bfd_zalloc (dynobj, s->_raw_size);
5922 if (s->contents == NULL)
5923 return FALSE;
5924 }
5925
5926 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5927 {
5928 s = ppc64_elf_tdata (ibfd)->got;
5929 if (s != NULL && s != htab->got)
5930 {
5931 s->_cooked_size = 0;
5932 if (s->_raw_size == 0)
5933 _bfd_strip_section_from_output (info, s);
5934 else
5935 {
5936 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5937 if (s->contents == NULL)
5938 return FALSE;
5939 }
5940 }
5941 s = ppc64_elf_tdata (ibfd)->relgot;
5942 if (s != NULL)
5943 {
5944 s->_cooked_size = 0;
5945 if (s->_raw_size == 0)
5946 _bfd_strip_section_from_output (info, s);
5947 else
5948 {
5949 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5950 if (s->contents == NULL)
5951 return FALSE;
5952 relocs = TRUE;
5953 s->reloc_count = 0;
5954 }
5955 }
5956 }
5957
5958 if (htab->elf.dynamic_sections_created)
5959 {
5960 /* Add some entries to the .dynamic section. We fill in the
5961 values later, in ppc64_elf_finish_dynamic_sections, but we
5962 must add the entries now so that we get the correct size for
5963 the .dynamic section. The DT_DEBUG entry is filled in by the
5964 dynamic linker and used by the debugger. */
5965 #define add_dynamic_entry(TAG, VAL) \
5966 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
5967
5968 if (info->executable)
5969 {
5970 if (!add_dynamic_entry (DT_DEBUG, 0))
5971 return FALSE;
5972 }
5973
5974 if (htab->plt != NULL && htab->plt->_raw_size != 0)
5975 {
5976 if (!add_dynamic_entry (DT_PLTGOT, 0)
5977 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5978 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5979 || !add_dynamic_entry (DT_JMPREL, 0)
5980 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
5981 return FALSE;
5982 }
5983
5984 if (NO_OPD_RELOCS)
5985 {
5986 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
5987 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
5988 return FALSE;
5989 }
5990
5991 if (relocs)
5992 {
5993 if (!add_dynamic_entry (DT_RELA, 0)
5994 || !add_dynamic_entry (DT_RELASZ, 0)
5995 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
5996 return FALSE;
5997
5998 /* If any dynamic relocs apply to a read-only section,
5999 then we need a DT_TEXTREL entry. */
6000 if ((info->flags & DF_TEXTREL) == 0)
6001 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6002
6003 if ((info->flags & DF_TEXTREL) != 0)
6004 {
6005 if (!add_dynamic_entry (DT_TEXTREL, 0))
6006 return FALSE;
6007 }
6008 }
6009 }
6010 #undef add_dynamic_entry
6011
6012 return TRUE;
6013 }
6014
6015 /* Determine the type of stub needed, if any, for a call. */
6016
6017 static inline enum ppc_stub_type
6018 ppc_type_of_stub (asection *input_sec,
6019 const Elf_Internal_Rela *rel,
6020 struct ppc_link_hash_entry **hash,
6021 bfd_vma destination)
6022 {
6023 struct ppc_link_hash_entry *h = *hash;
6024 bfd_vma location;
6025 bfd_vma branch_offset;
6026 bfd_vma max_branch_offset;
6027 enum elf_ppc64_reloc_type r_type;
6028
6029 if (h != NULL)
6030 {
6031 if (h->oh != NULL
6032 && h->oh->dynindx != -1)
6033 {
6034 struct plt_entry *ent;
6035 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6036 if (ent->addend == rel->r_addend
6037 && ent->plt.offset != (bfd_vma) -1)
6038 {
6039 *hash = (struct ppc_link_hash_entry *) h->oh;
6040 return ppc_stub_plt_call;
6041 }
6042 }
6043
6044 if (h->elf.root.type != bfd_link_hash_defined
6045 && h->elf.root.type != bfd_link_hash_defweak)
6046 return ppc_stub_none;
6047 }
6048
6049 /* Determine where the call point is. */
6050 location = (input_sec->output_offset
6051 + input_sec->output_section->vma
6052 + rel->r_offset);
6053
6054 branch_offset = destination - location;
6055 r_type = ELF64_R_TYPE (rel->r_info);
6056
6057 /* Determine if a long branch stub is needed. */
6058 max_branch_offset = 1 << 25;
6059 if (r_type != R_PPC64_REL24)
6060 max_branch_offset = 1 << 15;
6061
6062 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6063 /* We need a stub. Figure out whether a long_branch or plt_branch
6064 is needed later. */
6065 return ppc_stub_long_branch;
6066
6067 return ppc_stub_none;
6068 }
6069
6070 /* Build a .plt call stub. */
6071
6072 static inline bfd_byte *
6073 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6074 {
6075 #define PPC_LO(v) ((v) & 0xffff)
6076 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6077 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6078
6079 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6080 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6081 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6082 if (PPC_HA (offset + 8) != PPC_HA (offset))
6083 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6084 offset += 8;
6085 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6086 if (PPC_HA (offset + 8) != PPC_HA (offset))
6087 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6088 offset += 8;
6089 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6090 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6091 bfd_put_32 (obfd, BCTR, p), p += 4;
6092 return p;
6093 }
6094
6095 static bfd_boolean
6096 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6097 {
6098 struct ppc_stub_hash_entry *stub_entry;
6099 struct ppc_branch_hash_entry *br_entry;
6100 struct bfd_link_info *info;
6101 struct ppc_link_hash_table *htab;
6102 bfd_byte *loc;
6103 bfd_byte *p;
6104 unsigned int indx;
6105 struct plt_entry *ent;
6106 bfd_vma off;
6107 int size;
6108
6109 /* Massage our args to the form they really have. */
6110 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6111 info = in_arg;
6112
6113 htab = ppc_hash_table (info);
6114
6115 /* Make a note of the offset within the stubs for this entry. */
6116 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6117 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6118
6119 htab->stub_count[stub_entry->stub_type - 1] += 1;
6120 switch (stub_entry->stub_type)
6121 {
6122 case ppc_stub_long_branch:
6123 case ppc_stub_long_branch_r2off:
6124 /* Branches are relative. This is where we are going to. */
6125 off = (stub_entry->target_value
6126 + stub_entry->target_section->output_offset
6127 + stub_entry->target_section->output_section->vma);
6128
6129 /* And this is where we are coming from. */
6130 off -= (stub_entry->stub_offset
6131 + stub_entry->stub_sec->output_offset
6132 + stub_entry->stub_sec->output_section->vma);
6133
6134 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6135 size = 4;
6136 else
6137 {
6138 bfd_vma r2off;
6139
6140 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6141 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6142 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6143 loc += 4;
6144 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6145 loc += 4;
6146 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6147 loc += 4;
6148 off -= 12;
6149 size = 16;
6150 }
6151 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6152
6153 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6154 break;
6155
6156 case ppc_stub_plt_branch:
6157 case ppc_stub_plt_branch_r2off:
6158 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6159 stub_entry->root.string + 9,
6160 FALSE, FALSE);
6161 if (br_entry == NULL)
6162 {
6163 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6164 stub_entry->root.string + 9);
6165 htab->stub_error = TRUE;
6166 return FALSE;
6167 }
6168
6169 off = (stub_entry->target_value
6170 + stub_entry->target_section->output_offset
6171 + stub_entry->target_section->output_section->vma);
6172
6173 bfd_put_64 (htab->brlt->owner, off,
6174 htab->brlt->contents + br_entry->offset);
6175
6176 if (info->shared)
6177 {
6178 /* Create a reloc for the branch lookup table entry. */
6179 Elf_Internal_Rela rela;
6180 bfd_byte *rl;
6181
6182 rela.r_offset = (br_entry->offset
6183 + htab->brlt->output_offset
6184 + htab->brlt->output_section->vma);
6185 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6186 rela.r_addend = off;
6187
6188 rl = htab->relbrlt->contents;
6189 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6190 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6191 }
6192
6193 off = (br_entry->offset
6194 + htab->brlt->output_offset
6195 + htab->brlt->output_section->vma
6196 - elf_gp (htab->brlt->output_section->owner)
6197 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6198
6199 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6200 {
6201 (*_bfd_error_handler)
6202 (_("linkage table error against `%s'"),
6203 stub_entry->root.string);
6204 bfd_set_error (bfd_error_bad_value);
6205 htab->stub_error = TRUE;
6206 return FALSE;
6207 }
6208
6209 indx = off;
6210 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6211 {
6212 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6213 loc += 4;
6214 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6215 size = 16;
6216 }
6217 else
6218 {
6219 bfd_vma r2off;
6220
6221 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6222 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6223 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6224 loc += 4;
6225 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6226 loc += 4;
6227 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6228 loc += 4;
6229 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6230 loc += 4;
6231 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6232 size = 28;
6233 }
6234 loc += 4;
6235 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6236 loc += 4;
6237 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6238 break;
6239
6240 case ppc_stub_plt_call:
6241 /* Do the best we can for shared libraries built without
6242 exporting ".foo" for each "foo". This can happen when symbol
6243 versioning scripts strip all bar a subset of symbols. */
6244 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6245 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6246 {
6247 /* Point the symbol at the stub. There may be multiple stubs,
6248 we don't really care; The main thing is to make this sym
6249 defined somewhere. Maybe defining the symbol in the stub
6250 section is a silly idea. If we didn't do this, htab->top_id
6251 could disappear. */
6252 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6253 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6254 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6255 }
6256
6257 /* Now build the stub. */
6258 off = (bfd_vma) -1;
6259 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6260 if (ent->addend == stub_entry->addend)
6261 {
6262 off = ent->plt.offset;
6263 break;
6264 }
6265 if (off >= (bfd_vma) -2)
6266 abort ();
6267
6268 off &= ~ (bfd_vma) 1;
6269 off += (htab->plt->output_offset
6270 + htab->plt->output_section->vma
6271 - elf_gp (htab->plt->output_section->owner)
6272 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6273
6274 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6275 {
6276 (*_bfd_error_handler)
6277 (_("linkage table error against `%s'"),
6278 stub_entry->h->elf.root.root.string);
6279 bfd_set_error (bfd_error_bad_value);
6280 htab->stub_error = TRUE;
6281 return FALSE;
6282 }
6283
6284 p = build_plt_stub (htab->stub_bfd, loc, off);
6285 size = p - loc;
6286 break;
6287
6288 default:
6289 BFD_FAIL ();
6290 return FALSE;
6291 }
6292
6293 stub_entry->stub_sec->_cooked_size += size;
6294
6295 if (htab->emit_stub_syms
6296 && !(stub_entry->stub_type == ppc_stub_plt_call
6297 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6298 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6299 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6300 {
6301 struct elf_link_hash_entry *h;
6302 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6303 TRUE, FALSE, FALSE);
6304 if (h == NULL)
6305 return FALSE;
6306 if (h->root.type == bfd_link_hash_new)
6307 {
6308 h->root.type = bfd_link_hash_defined;
6309 h->root.u.def.section = stub_entry->stub_sec;
6310 h->root.u.def.value = stub_entry->stub_offset;
6311 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6312 | ELF_LINK_HASH_DEF_REGULAR
6313 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6314 | ELF_LINK_FORCED_LOCAL);
6315 }
6316 }
6317
6318 return TRUE;
6319 }
6320
6321 /* As above, but don't actually build the stub. Just bump offset so
6322 we know stub section sizes, and select plt_branch stubs where
6323 long_branch stubs won't do. */
6324
6325 static bfd_boolean
6326 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6327 {
6328 struct ppc_stub_hash_entry *stub_entry;
6329 struct ppc_link_hash_table *htab;
6330 bfd_vma off;
6331 int size;
6332
6333 /* Massage our args to the form they really have. */
6334 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6335 htab = in_arg;
6336
6337 if (stub_entry->stub_type == ppc_stub_plt_call)
6338 {
6339 struct plt_entry *ent;
6340 off = (bfd_vma) -1;
6341 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6342 if (ent->addend == stub_entry->addend)
6343 {
6344 off = ent->plt.offset & ~(bfd_vma) 1;
6345 break;
6346 }
6347 if (off >= (bfd_vma) -2)
6348 abort ();
6349 off += (htab->plt->output_offset
6350 + htab->plt->output_section->vma
6351 - elf_gp (htab->plt->output_section->owner)
6352 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6353
6354 size = PLT_CALL_STUB_SIZE;
6355 if (PPC_HA (off + 16) != PPC_HA (off))
6356 size += 4;
6357 }
6358 else
6359 {
6360 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6361 variants. */
6362 off = (stub_entry->target_value
6363 + stub_entry->target_section->output_offset
6364 + stub_entry->target_section->output_section->vma);
6365 off -= (stub_entry->stub_sec->_raw_size
6366 + stub_entry->stub_sec->output_offset
6367 + stub_entry->stub_sec->output_section->vma);
6368
6369 /* Reset the stub type from the plt variant in case we now
6370 can reach with a shorter stub. */
6371 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6372 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6373
6374 size = 4;
6375 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6376 {
6377 off -= 12;
6378 size = 16;
6379 }
6380
6381 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6382 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6383 {
6384 struct ppc_branch_hash_entry *br_entry;
6385
6386 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6387 stub_entry->root.string + 9,
6388 TRUE, FALSE);
6389 if (br_entry == NULL)
6390 {
6391 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6392 stub_entry->root.string + 9);
6393 htab->stub_error = TRUE;
6394 return FALSE;
6395 }
6396
6397 if (br_entry->iter != htab->stub_iteration)
6398 {
6399 br_entry->iter = htab->stub_iteration;
6400 br_entry->offset = htab->brlt->_raw_size;
6401 htab->brlt->_raw_size += 8;
6402 }
6403
6404 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6405 size = 16;
6406 if (stub_entry->stub_type != ppc_stub_plt_branch)
6407 size = 28;
6408 }
6409 }
6410
6411 stub_entry->stub_sec->_raw_size += size;
6412 return TRUE;
6413 }
6414
6415 /* Set up various things so that we can make a list of input sections
6416 for each output section included in the link. Returns -1 on error,
6417 0 when no stubs will be needed, and 1 on success. */
6418
6419 int
6420 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6421 {
6422 bfd *input_bfd;
6423 int top_id, top_index, id;
6424 asection *section;
6425 asection **input_list;
6426 bfd_size_type amt;
6427 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6428
6429 if (htab->brlt == NULL)
6430 return 0;
6431
6432 /* Find the top input section id. */
6433 for (input_bfd = info->input_bfds, top_id = 3;
6434 input_bfd != NULL;
6435 input_bfd = input_bfd->link_next)
6436 {
6437 for (section = input_bfd->sections;
6438 section != NULL;
6439 section = section->next)
6440 {
6441 if (top_id < section->id)
6442 top_id = section->id;
6443 }
6444 }
6445
6446 htab->top_id = top_id;
6447 amt = sizeof (struct map_stub) * (top_id + 1);
6448 htab->stub_group = bfd_zmalloc (amt);
6449 if (htab->stub_group == NULL)
6450 return -1;
6451
6452 /* Set toc_off for com, und, abs and ind sections. */
6453 for (id = 0; id < 3; id++)
6454 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6455
6456 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6457
6458 /* We can't use output_bfd->section_count here to find the top output
6459 section index as some sections may have been removed, and
6460 _bfd_strip_section_from_output doesn't renumber the indices. */
6461 for (section = output_bfd->sections, top_index = 0;
6462 section != NULL;
6463 section = section->next)
6464 {
6465 if (top_index < section->index)
6466 top_index = section->index;
6467 }
6468
6469 htab->top_index = top_index;
6470 amt = sizeof (asection *) * (top_index + 1);
6471 input_list = bfd_zmalloc (amt);
6472 htab->input_list = input_list;
6473 if (input_list == NULL)
6474 return -1;
6475
6476 return 1;
6477 }
6478
6479 /* The linker repeatedly calls this function for each TOC input section
6480 and linker generated GOT section. Group input bfds such that the toc
6481 within a group is less than 64k in size. Will break with cute linker
6482 scripts that play games with dot in the output toc section. */
6483
6484 void
6485 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6486 {
6487 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6488
6489 if (!htab->no_multi_toc)
6490 {
6491 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6492 bfd_vma off = addr - htab->toc_curr;
6493 if (off + isec->_raw_size > 0x10000)
6494 {
6495 htab->toc_curr = addr;
6496 htab->multi_toc_needed = 1;
6497 }
6498 elf_gp (isec->owner) = (htab->toc_curr
6499 - elf_gp (isec->output_section->owner)
6500 + TOC_BASE_OFF);
6501 }
6502 }
6503
6504 /* Called after the last call to the above function. */
6505
6506 void
6507 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6508 struct bfd_link_info *info)
6509 {
6510 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6511
6512 /* toc_curr tracks the TOC offset used for code sections below in
6513 ppc64_elf_next_input_section. Start off at 0x8000. */
6514 htab->toc_curr = TOC_BASE_OFF;
6515 }
6516
6517 /* No toc references were found in ISEC. If the code in ISEC makes no
6518 calls, then there's no need to use toc adjusting stubs when branching
6519 into ISEC. Actually, indirect calls from ISEC are OK as they will
6520 load r2. */
6521
6522 static int
6523 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6524 {
6525 bfd_byte *contents;
6526 bfd_size_type i;
6527 int ret;
6528 int branch_ok;
6529
6530 /* We know none of our code bearing sections will need toc stubs. */
6531 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6532 return 0;
6533
6534 /* Hack for linux kernel. .fixup contains branches, but only back to
6535 the function that hit an exception. */
6536 branch_ok = strcmp (isec->name, ".fixup") == 0;
6537
6538 contents = elf_section_data (isec)->this_hdr.contents;
6539 if (contents == NULL)
6540 {
6541 contents = bfd_malloc (isec->_raw_size);
6542 if (contents == NULL)
6543 return -1;
6544 if (! bfd_get_section_contents (isec->owner, isec, contents,
6545 0, isec->_raw_size))
6546 {
6547 free (contents);
6548 return -1;
6549 }
6550 if (info->keep_memory)
6551 elf_section_data (isec)->this_hdr.contents = contents;
6552 }
6553
6554 /* Code scan, because we don't necessarily have relocs on calls to
6555 static functions. */
6556 ret = 0;
6557 for (i = 0; i < isec->_raw_size; i += 4)
6558 {
6559 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6560 /* Is this a branch? */
6561 if ((insn & (0x3f << 26)) == (18 << 26)
6562 /* If branch and link, it's a function call. */
6563 && ((insn & 1) != 0
6564 /* Sibling calls use a plain branch. I don't know a way
6565 of deciding whether a branch is really a sibling call. */
6566 || !branch_ok))
6567 {
6568 ret = 1;
6569 break;
6570 }
6571 }
6572
6573 if (elf_section_data (isec)->this_hdr.contents != contents)
6574 free (contents);
6575 return ret;
6576 }
6577
6578 /* The linker repeatedly calls this function for each input section,
6579 in the order that input sections are linked into output sections.
6580 Build lists of input sections to determine groupings between which
6581 we may insert linker stubs. */
6582
6583 bfd_boolean
6584 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6585 {
6586 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6587 int ret;
6588
6589 if ((isec->output_section->flags & SEC_CODE) != 0
6590 && isec->output_section->index <= htab->top_index)
6591 {
6592 asection **list = htab->input_list + isec->output_section->index;
6593 /* Steal the link_sec pointer for our list. */
6594 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6595 /* This happens to make the list in reverse order,
6596 which is what we want. */
6597 PREV_SEC (isec) = *list;
6598 *list = isec;
6599 }
6600
6601 /* If a code section has a function that uses the TOC then we need
6602 to use the right TOC (obviously). Also, make sure that .opd gets
6603 the correct TOC value for R_PPC64_TOC relocs that don't have or
6604 can't find their function symbol (shouldn't ever happen now). */
6605 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6606 {
6607 if (elf_gp (isec->owner) != 0)
6608 htab->toc_curr = elf_gp (isec->owner);
6609 }
6610 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6611 return FALSE;
6612 else
6613 isec->has_gp_reloc = ret;
6614
6615 /* Functions that don't use the TOC can belong in any TOC group.
6616 Use the last TOC base. This happens to make _init and _fini
6617 pasting work. */
6618 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6619 return TRUE;
6620 }
6621
6622 /* See whether we can group stub sections together. Grouping stub
6623 sections may result in fewer stubs. More importantly, we need to
6624 put all .init* and .fini* stubs at the beginning of the .init or
6625 .fini output sections respectively, because glibc splits the
6626 _init and _fini functions into multiple parts. Putting a stub in
6627 the middle of a function is not a good idea. */
6628
6629 static void
6630 group_sections (struct ppc_link_hash_table *htab,
6631 bfd_size_type stub_group_size,
6632 bfd_boolean stubs_always_before_branch)
6633 {
6634 asection **list = htab->input_list + htab->top_index;
6635 do
6636 {
6637 asection *tail = *list;
6638 while (tail != NULL)
6639 {
6640 asection *curr;
6641 asection *prev;
6642 bfd_size_type total;
6643 bfd_boolean big_sec;
6644 bfd_vma curr_toc;
6645
6646 curr = tail;
6647 if (tail->_cooked_size)
6648 total = tail->_cooked_size;
6649 else
6650 total = tail->_raw_size;
6651 big_sec = total >= stub_group_size;
6652 curr_toc = htab->stub_group[tail->id].toc_off;
6653
6654 while ((prev = PREV_SEC (curr)) != NULL
6655 && ((total += curr->output_offset - prev->output_offset)
6656 < stub_group_size)
6657 && htab->stub_group[prev->id].toc_off == curr_toc)
6658 curr = prev;
6659
6660 /* OK, the size from the start of CURR to the end is less
6661 than stub_group_size and thus can be handled by one stub
6662 section. (or the tail section is itself larger than
6663 stub_group_size, in which case we may be toast.) We
6664 should really be keeping track of the total size of stubs
6665 added here, as stubs contribute to the final output
6666 section size. That's a little tricky, and this way will
6667 only break if stubs added make the total size more than
6668 2^25, ie. for the default stub_group_size, if stubs total
6669 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6670 do
6671 {
6672 prev = PREV_SEC (tail);
6673 /* Set up this stub group. */
6674 htab->stub_group[tail->id].link_sec = curr;
6675 }
6676 while (tail != curr && (tail = prev) != NULL);
6677
6678 /* But wait, there's more! Input sections up to stub_group_size
6679 bytes before the stub section can be handled by it too.
6680 Don't do this if we have a really large section after the
6681 stubs, as adding more stubs increases the chance that
6682 branches may not reach into the stub section. */
6683 if (!stubs_always_before_branch && !big_sec)
6684 {
6685 total = 0;
6686 while (prev != NULL
6687 && ((total += tail->output_offset - prev->output_offset)
6688 < stub_group_size)
6689 && htab->stub_group[prev->id].toc_off == curr_toc)
6690 {
6691 tail = prev;
6692 prev = PREV_SEC (tail);
6693 htab->stub_group[tail->id].link_sec = curr;
6694 }
6695 }
6696 tail = prev;
6697 }
6698 }
6699 while (list-- != htab->input_list);
6700 free (htab->input_list);
6701 #undef PREV_SEC
6702 }
6703
6704 /* Determine and set the size of the stub section for a final link.
6705
6706 The basic idea here is to examine all the relocations looking for
6707 PC-relative calls to a target that is unreachable with a "bl"
6708 instruction. */
6709
6710 bfd_boolean
6711 ppc64_elf_size_stubs (bfd *output_bfd,
6712 struct bfd_link_info *info,
6713 bfd_signed_vma group_size,
6714 asection *(*add_stub_section) (const char *, asection *),
6715 void (*layout_sections_again) (void))
6716 {
6717 bfd_size_type stub_group_size;
6718 bfd_boolean stubs_always_before_branch;
6719 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6720
6721 /* Stash our params away. */
6722 htab->add_stub_section = add_stub_section;
6723 htab->layout_sections_again = layout_sections_again;
6724 stubs_always_before_branch = group_size < 0;
6725 if (group_size < 0)
6726 stub_group_size = -group_size;
6727 else
6728 stub_group_size = group_size;
6729 if (stub_group_size == 1)
6730 {
6731 /* Default values. */
6732 if (stubs_always_before_branch)
6733 {
6734 stub_group_size = 0x1e00000;
6735 if (htab->has_14bit_branch)
6736 stub_group_size = 0x7800;
6737 }
6738 else
6739 {
6740 stub_group_size = 0x1c00000;
6741 if (htab->has_14bit_branch)
6742 stub_group_size = 0x7000;
6743 }
6744 }
6745
6746 group_sections (htab, stub_group_size, stubs_always_before_branch);
6747
6748 while (1)
6749 {
6750 bfd *input_bfd;
6751 unsigned int bfd_indx;
6752 asection *stub_sec;
6753 bfd_boolean stub_changed;
6754
6755 htab->stub_iteration += 1;
6756 stub_changed = FALSE;
6757
6758 for (input_bfd = info->input_bfds, bfd_indx = 0;
6759 input_bfd != NULL;
6760 input_bfd = input_bfd->link_next, bfd_indx++)
6761 {
6762 Elf_Internal_Shdr *symtab_hdr;
6763 asection *section;
6764 Elf_Internal_Sym *local_syms = NULL;
6765
6766 /* We'll need the symbol table in a second. */
6767 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6768 if (symtab_hdr->sh_info == 0)
6769 continue;
6770
6771 /* Walk over each section attached to the input bfd. */
6772 for (section = input_bfd->sections;
6773 section != NULL;
6774 section = section->next)
6775 {
6776 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6777
6778 /* If there aren't any relocs, then there's nothing more
6779 to do. */
6780 if ((section->flags & SEC_RELOC) == 0
6781 || section->reloc_count == 0)
6782 continue;
6783
6784 /* If this section is a link-once section that will be
6785 discarded, then don't create any stubs. */
6786 if (section->output_section == NULL
6787 || section->output_section->owner != output_bfd)
6788 continue;
6789
6790 /* Get the relocs. */
6791 internal_relocs
6792 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6793 info->keep_memory);
6794 if (internal_relocs == NULL)
6795 goto error_ret_free_local;
6796
6797 /* Now examine each relocation. */
6798 irela = internal_relocs;
6799 irelaend = irela + section->reloc_count;
6800 for (; irela < irelaend; irela++)
6801 {
6802 enum elf_ppc64_reloc_type r_type;
6803 unsigned int r_indx;
6804 enum ppc_stub_type stub_type;
6805 struct ppc_stub_hash_entry *stub_entry;
6806 asection *sym_sec;
6807 bfd_vma sym_value;
6808 bfd_vma destination;
6809 struct ppc_link_hash_entry *hash;
6810 struct elf_link_hash_entry *h;
6811 Elf_Internal_Sym *sym;
6812 char *stub_name;
6813 const asection *id_sec;
6814
6815 r_type = ELF64_R_TYPE (irela->r_info);
6816 r_indx = ELF64_R_SYM (irela->r_info);
6817
6818 if (r_type >= R_PPC64_max)
6819 {
6820 bfd_set_error (bfd_error_bad_value);
6821 goto error_ret_free_internal;
6822 }
6823
6824 /* Only look for stubs on branch instructions. */
6825 if (r_type != R_PPC64_REL24
6826 && r_type != R_PPC64_REL14
6827 && r_type != R_PPC64_REL14_BRTAKEN
6828 && r_type != R_PPC64_REL14_BRNTAKEN)
6829 continue;
6830
6831 /* Now determine the call target, its name, value,
6832 section. */
6833 destination = 0;
6834 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6835 r_indx, input_bfd))
6836 goto error_ret_free_internal;
6837 hash = (struct ppc_link_hash_entry *) h;
6838
6839 if (hash == NULL)
6840 {
6841 /* It's a local symbol. */
6842 sym_value = sym->st_value;
6843 destination = (sym_value + irela->r_addend
6844 + sym_sec->output_offset
6845 + sym_sec->output_section->vma);
6846 }
6847 else
6848 {
6849 /* It's an external symbol. */
6850 sym_value = 0;
6851 if (hash->elf.root.type == bfd_link_hash_defined
6852 || hash->elf.root.type == bfd_link_hash_defweak)
6853 {
6854 sym_value = hash->elf.root.u.def.value;
6855 if (sym_sec->output_section != NULL)
6856 destination = (sym_value + irela->r_addend
6857 + sym_sec->output_offset
6858 + sym_sec->output_section->vma);
6859 }
6860 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6861 ;
6862 else if (hash->elf.root.type == bfd_link_hash_undefined)
6863 ;
6864 else
6865 {
6866 bfd_set_error (bfd_error_bad_value);
6867 goto error_ret_free_internal;
6868 }
6869 }
6870
6871 /* Determine what (if any) linker stub is needed. */
6872 stub_type = ppc_type_of_stub (section, irela, &hash,
6873 destination);
6874
6875 if (stub_type != ppc_stub_plt_call)
6876 {
6877 /* Check whether we need a TOC adjusting stub.
6878 Since the linker pastes together pieces from
6879 different object files when creating the
6880 _init and _fini functions, it may be that a
6881 call to what looks like a local sym is in
6882 fact a call needing a TOC adjustment. */
6883 if (sym_sec != NULL
6884 && sym_sec->output_section != NULL
6885 && (htab->stub_group[sym_sec->id].toc_off
6886 != htab->stub_group[section->id].toc_off)
6887 && sym_sec->has_gp_reloc
6888 && section->has_gp_reloc)
6889 stub_type = ppc_stub_long_branch_r2off;
6890 }
6891
6892 if (stub_type == ppc_stub_none)
6893 continue;
6894
6895 /* __tls_get_addr calls might be eliminated. */
6896 if (stub_type != ppc_stub_plt_call
6897 && hash != NULL
6898 && &hash->elf == htab->tls_get_addr
6899 && section->has_tls_reloc
6900 && irela != internal_relocs)
6901 {
6902 /* Get tls info. */
6903 char *tls_mask;
6904
6905 if (!get_tls_mask (&tls_mask, &local_syms,
6906 irela - 1, input_bfd))
6907 goto error_ret_free_internal;
6908 if (*tls_mask != 0)
6909 continue;
6910 }
6911
6912 /* Support for grouping stub sections. */
6913 id_sec = htab->stub_group[section->id].link_sec;
6914
6915 /* Get the name of this stub. */
6916 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6917 if (!stub_name)
6918 goto error_ret_free_internal;
6919
6920 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6921 stub_name, FALSE, FALSE);
6922 if (stub_entry != NULL)
6923 {
6924 /* The proper stub has already been created. */
6925 free (stub_name);
6926 continue;
6927 }
6928
6929 stub_entry = ppc_add_stub (stub_name, section, htab);
6930 if (stub_entry == NULL)
6931 {
6932 free (stub_name);
6933 error_ret_free_internal:
6934 if (elf_section_data (section)->relocs == NULL)
6935 free (internal_relocs);
6936 error_ret_free_local:
6937 if (local_syms != NULL
6938 && (symtab_hdr->contents
6939 != (unsigned char *) local_syms))
6940 free (local_syms);
6941 return FALSE;
6942 }
6943
6944 stub_entry->stub_type = stub_type;
6945 stub_entry->target_value = sym_value;
6946 stub_entry->target_section = sym_sec;
6947 stub_entry->h = hash;
6948 stub_entry->addend = irela->r_addend;
6949 stub_changed = TRUE;
6950 }
6951
6952 /* We're done with the internal relocs, free them. */
6953 if (elf_section_data (section)->relocs != internal_relocs)
6954 free (internal_relocs);
6955 }
6956
6957 if (local_syms != NULL
6958 && symtab_hdr->contents != (unsigned char *) local_syms)
6959 {
6960 if (!info->keep_memory)
6961 free (local_syms);
6962 else
6963 symtab_hdr->contents = (unsigned char *) local_syms;
6964 }
6965 }
6966
6967 if (!stub_changed)
6968 break;
6969
6970 /* OK, we've added some stubs. Find out the new size of the
6971 stub sections. */
6972 for (stub_sec = htab->stub_bfd->sections;
6973 stub_sec != NULL;
6974 stub_sec = stub_sec->next)
6975 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
6976 {
6977 stub_sec->_raw_size = 0;
6978 stub_sec->_cooked_size = 0;
6979 }
6980 htab->brlt->_raw_size = 0;
6981 htab->brlt->_cooked_size = 0;
6982
6983 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
6984
6985 /* Ask the linker to do its stuff. */
6986 (*htab->layout_sections_again) ();
6987 }
6988
6989 /* It would be nice to strip .branch_lt from the output if the
6990 section is empty, but it's too late. If we strip sections here,
6991 the dynamic symbol table is corrupted since the section symbol
6992 for the stripped section isn't written. */
6993
6994 return TRUE;
6995 }
6996
6997 /* Called after we have determined section placement. If sections
6998 move, we'll be called again. Provide a value for TOCstart. */
6999
7000 bfd_vma
7001 ppc64_elf_toc (bfd *obfd)
7002 {
7003 asection *s;
7004 bfd_vma TOCstart;
7005
7006 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7007 order. The TOC starts where the first of these sections starts. */
7008 s = bfd_get_section_by_name (obfd, ".got");
7009 if (s == NULL)
7010 s = bfd_get_section_by_name (obfd, ".toc");
7011 if (s == NULL)
7012 s = bfd_get_section_by_name (obfd, ".tocbss");
7013 if (s == NULL)
7014 s = bfd_get_section_by_name (obfd, ".plt");
7015 if (s == NULL)
7016 {
7017 /* This may happen for
7018 o references to TOC base (SYM@toc / TOC[tc0]) without a
7019 .toc directive
7020 o bad linker script
7021 o --gc-sections and empty TOC sections
7022
7023 FIXME: Warn user? */
7024
7025 /* Look for a likely section. We probably won't even be
7026 using TOCstart. */
7027 for (s = obfd->sections; s != NULL; s = s->next)
7028 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7029 == (SEC_ALLOC | SEC_SMALL_DATA))
7030 break;
7031 if (s == NULL)
7032 for (s = obfd->sections; s != NULL; s = s->next)
7033 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7034 == (SEC_ALLOC | SEC_SMALL_DATA))
7035 break;
7036 if (s == NULL)
7037 for (s = obfd->sections; s != NULL; s = s->next)
7038 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7039 break;
7040 if (s == NULL)
7041 for (s = obfd->sections; s != NULL; s = s->next)
7042 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7043 break;
7044 }
7045
7046 TOCstart = 0;
7047 if (s != NULL)
7048 TOCstart = s->output_section->vma + s->output_offset;
7049
7050 return TOCstart;
7051 }
7052
7053 /* Build all the stubs associated with the current output file.
7054 The stubs are kept in a hash table attached to the main linker
7055 hash table. This function is called via gldelf64ppc_finish. */
7056
7057 bfd_boolean
7058 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7059 struct bfd_link_info *info,
7060 char **stats)
7061 {
7062 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7063 asection *stub_sec;
7064 bfd_byte *p;
7065 int stub_sec_count = 0;
7066
7067 htab->emit_stub_syms = emit_stub_syms;
7068 for (stub_sec = htab->stub_bfd->sections;
7069 stub_sec != NULL;
7070 stub_sec = stub_sec->next)
7071 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7072 {
7073 bfd_size_type size;
7074
7075 /* Allocate memory to hold the linker stubs. */
7076 size = stub_sec->_raw_size;
7077 if (size != 0)
7078 {
7079 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7080 if (stub_sec->contents == NULL)
7081 return FALSE;
7082 }
7083 stub_sec->_cooked_size = 0;
7084 }
7085
7086 if (htab->plt != NULL)
7087 {
7088 unsigned int indx;
7089 bfd_vma plt0;
7090
7091 /* Build the .glink plt call stub. */
7092 plt0 = (htab->plt->output_section->vma
7093 + htab->plt->output_offset
7094 - (htab->glink->output_section->vma
7095 + htab->glink->output_offset
7096 + GLINK_CALL_STUB_SIZE));
7097 if (plt0 + 0x80008000 > 0xffffffff)
7098 {
7099 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7100 bfd_set_error (bfd_error_bad_value);
7101 return FALSE;
7102 }
7103
7104 if (htab->emit_stub_syms)
7105 {
7106 struct elf_link_hash_entry *h;
7107 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7108 if (h == NULL)
7109 return FALSE;
7110 if (h->root.type == bfd_link_hash_new)
7111 {
7112 h->root.type = bfd_link_hash_defined;
7113 h->root.u.def.section = htab->glink;
7114 h->root.u.def.value = 0;
7115 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7116 | ELF_LINK_HASH_DEF_REGULAR
7117 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7118 | ELF_LINK_FORCED_LOCAL);
7119 }
7120 }
7121 p = htab->glink->contents;
7122 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7123 p += 4;
7124 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7125 p += 4;
7126 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7127 p += 4;
7128 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7129 p += 4;
7130 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7131 p += 4;
7132 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7133 p += 4;
7134 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7135 p += 4;
7136 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7137 p += 4;
7138 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7139 p += 4;
7140 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7141 p += 4;
7142 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7143 p += 4;
7144 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7145 p += 4;
7146 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7147 p += 4;
7148 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7149 p += 4;
7150 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7151 p += 4;
7152 bfd_put_32 (htab->glink->owner, BCTR, p);
7153 p += 4;
7154
7155 /* Build the .glink lazy link call stubs. */
7156 indx = 0;
7157 while (p < htab->glink->contents + htab->glink->_raw_size)
7158 {
7159 if (indx < 0x8000)
7160 {
7161 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7162 p += 4;
7163 }
7164 else
7165 {
7166 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7167 p += 4;
7168 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7169 p += 4;
7170 }
7171 bfd_put_32 (htab->glink->owner,
7172 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7173 indx++;
7174 p += 4;
7175 }
7176 htab->glink->_cooked_size = p - htab->glink->contents;
7177 }
7178
7179 if (htab->brlt->_raw_size != 0)
7180 {
7181 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7182 htab->brlt->_raw_size);
7183 if (htab->brlt->contents == NULL)
7184 return FALSE;
7185 }
7186
7187 /* Build the stubs as directed by the stub hash table. */
7188 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7189
7190 for (stub_sec = htab->stub_bfd->sections;
7191 stub_sec != NULL;
7192 stub_sec = stub_sec->next)
7193 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7194 {
7195 stub_sec_count += 1;
7196 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7197 break;
7198 }
7199
7200 if (stub_sec != NULL
7201 || htab->glink->_raw_size != htab->glink->_cooked_size)
7202 {
7203 htab->stub_error = TRUE;
7204 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7205 }
7206
7207 if (htab->stub_error)
7208 return FALSE;
7209
7210 if (stats != NULL)
7211 {
7212 *stats = bfd_malloc (500);
7213 if (*stats == NULL)
7214 return FALSE;
7215
7216 sprintf (*stats, _("linker stubs in %u groups\n"
7217 " branch %lu\n"
7218 " toc adjust %lu\n"
7219 " long branch %lu\n"
7220 " long toc adj %lu\n"
7221 " plt call %lu"),
7222 stub_sec_count,
7223 htab->stub_count[ppc_stub_long_branch - 1],
7224 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7225 htab->stub_count[ppc_stub_plt_branch - 1],
7226 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7227 htab->stub_count[ppc_stub_plt_call - 1]);
7228 }
7229 return TRUE;
7230 }
7231
7232 /* The RELOCATE_SECTION function is called by the ELF backend linker
7233 to handle the relocations for a section.
7234
7235 The relocs are always passed as Rela structures; if the section
7236 actually uses Rel structures, the r_addend field will always be
7237 zero.
7238
7239 This function is responsible for adjust the section contents as
7240 necessary, and (if using Rela relocs and generating a
7241 relocatable output file) adjusting the reloc addend as
7242 necessary.
7243
7244 This function does not have to worry about setting the reloc
7245 address or the reloc symbol index.
7246
7247 LOCAL_SYMS is a pointer to the swapped in local symbols.
7248
7249 LOCAL_SECTIONS is an array giving the section in the input file
7250 corresponding to the st_shndx field of each local symbol.
7251
7252 The global hash table entry for the global symbols can be found
7253 via elf_sym_hashes (input_bfd).
7254
7255 When generating relocatable output, this function must handle
7256 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7257 going to be the section symbol corresponding to the output
7258 section, which means that the addend must be adjusted
7259 accordingly. */
7260
7261 static bfd_boolean
7262 ppc64_elf_relocate_section (bfd *output_bfd,
7263 struct bfd_link_info *info,
7264 bfd *input_bfd,
7265 asection *input_section,
7266 bfd_byte *contents,
7267 Elf_Internal_Rela *relocs,
7268 Elf_Internal_Sym *local_syms,
7269 asection **local_sections)
7270 {
7271 struct ppc_link_hash_table *htab;
7272 Elf_Internal_Shdr *symtab_hdr;
7273 struct elf_link_hash_entry **sym_hashes;
7274 Elf_Internal_Rela *rel;
7275 Elf_Internal_Rela *relend;
7276 Elf_Internal_Rela outrel;
7277 bfd_byte *loc;
7278 struct got_entry **local_got_ents;
7279 bfd_vma TOCstart;
7280 bfd_boolean ret = TRUE;
7281 bfd_boolean is_opd;
7282 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7283 bfd_boolean is_power4 = FALSE;
7284
7285 if (info->relocatable)
7286 return TRUE;
7287
7288 /* Initialize howto table if needed. */
7289 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7290 ppc_howto_init ();
7291
7292 htab = ppc_hash_table (info);
7293 local_got_ents = elf_local_got_ents (input_bfd);
7294 TOCstart = elf_gp (output_bfd);
7295 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7296 sym_hashes = elf_sym_hashes (input_bfd);
7297 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7298
7299 rel = relocs;
7300 relend = relocs + input_section->reloc_count;
7301 for (; rel < relend; rel++)
7302 {
7303 enum elf_ppc64_reloc_type r_type;
7304 bfd_vma addend;
7305 bfd_reloc_status_type r;
7306 Elf_Internal_Sym *sym;
7307 asection *sec;
7308 struct elf_link_hash_entry *h;
7309 struct elf_link_hash_entry *fdh;
7310 const char *sym_name;
7311 unsigned long r_symndx;
7312 char tls_mask, tls_gd, tls_type;
7313 bfd_vma relocation;
7314 bfd_boolean unresolved_reloc;
7315 bfd_boolean warned;
7316 unsigned long insn, mask;
7317 struct ppc_stub_hash_entry *stub_entry;
7318 bfd_vma max_br_offset;
7319 bfd_vma from;
7320
7321 r_type = ELF64_R_TYPE (rel->r_info);
7322 r_symndx = ELF64_R_SYM (rel->r_info);
7323
7324 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7325 symbol of the previous ADDR64 reloc. The symbol gives us the
7326 proper TOC base to use. */
7327 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7328 && rel != relocs
7329 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7330 && is_opd)
7331 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7332
7333 sym = NULL;
7334 sec = NULL;
7335 h = NULL;
7336 sym_name = NULL;
7337 unresolved_reloc = FALSE;
7338 warned = FALSE;
7339
7340 if (r_symndx < symtab_hdr->sh_info)
7341 {
7342 /* It's a local symbol. */
7343 sym = local_syms + r_symndx;
7344 sec = local_sections[r_symndx];
7345 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7346 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
7347 if (elf_section_data (sec) != NULL)
7348 {
7349 long *opd_sym_adjust;
7350
7351 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7352 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7353 relocation += opd_sym_adjust[sym->st_value / 24];
7354 }
7355 }
7356 else
7357 {
7358 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
7359 symtab_hdr, relocation, sec,
7360 unresolved_reloc, info,
7361 warned);
7362 sym_name = h->root.root.string;
7363 }
7364
7365 /* TLS optimizations. Replace instruction sequences and relocs
7366 based on information we collected in tls_optimize. We edit
7367 RELOCS so that --emit-relocs will output something sensible
7368 for the final instruction stream. */
7369 tls_mask = 0;
7370 tls_gd = 0;
7371 if (IS_PPC64_TLS_RELOC (r_type))
7372 {
7373 if (h != NULL)
7374 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7375 else if (local_got_ents != NULL)
7376 {
7377 char *lgot_masks;
7378 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7379 tls_mask = lgot_masks[r_symndx];
7380 }
7381 }
7382
7383 /* Ensure reloc mapping code below stays sane. */
7384 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7385 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7386 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7387 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7388 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7389 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7390 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7391 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7392 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7393 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7394 abort ();
7395 switch (r_type)
7396 {
7397 default:
7398 break;
7399
7400 case R_PPC64_TOC16:
7401 case R_PPC64_TOC16_LO:
7402 case R_PPC64_TOC16_DS:
7403 case R_PPC64_TOC16_LO_DS:
7404 {
7405 /* Check for toc tls entries. */
7406 char *toc_tls;
7407 int retval;
7408
7409 retval = get_tls_mask (&toc_tls, &local_syms, rel, input_bfd);
7410 if (retval == 0)
7411 return FALSE;
7412
7413 if (toc_tls)
7414 {
7415 tls_mask = *toc_tls;
7416 if (r_type == R_PPC64_TOC16_DS
7417 || r_type == R_PPC64_TOC16_LO_DS)
7418 {
7419 if (tls_mask != 0
7420 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7421 goto toctprel;
7422 }
7423 else
7424 {
7425 /* If we found a GD reloc pair, then we might be
7426 doing a GD->IE transition. */
7427 if (retval == 2)
7428 {
7429 tls_gd = TLS_TPRELGD;
7430 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7431 goto tls_get_addr_check;
7432 }
7433 else if (retval == 3)
7434 {
7435 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7436 goto tls_get_addr_check;
7437 }
7438 }
7439 }
7440 }
7441 break;
7442
7443 case R_PPC64_GOT_TPREL16_DS:
7444 case R_PPC64_GOT_TPREL16_LO_DS:
7445 if (tls_mask != 0
7446 && (tls_mask & TLS_TPREL) == 0)
7447 {
7448 toctprel:
7449 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7450 insn &= 31 << 21;
7451 insn |= 0x3c0d0000; /* addis 0,13,0 */
7452 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7453 r_type = R_PPC64_TPREL16_HA;
7454 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7455 }
7456 break;
7457
7458 case R_PPC64_TLS:
7459 if (tls_mask == 0)
7460 {
7461 /* Check for toc tls entries. */
7462 char *toc_tls;
7463
7464 if (!get_tls_mask (&toc_tls, &local_syms, rel, input_bfd))
7465 return FALSE;
7466
7467 if (toc_tls)
7468 tls_mask = *toc_tls;
7469 }
7470 if (tls_mask != 0
7471 && (tls_mask & TLS_TPREL) == 0)
7472 {
7473 bfd_vma rtra;
7474 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7475 if ((insn & ((0x3f << 26) | (31 << 11)))
7476 == ((31 << 26) | (13 << 11)))
7477 rtra = insn & ((1 << 26) - (1 << 16));
7478 else if ((insn & ((0x3f << 26) | (31 << 16)))
7479 == ((31 << 26) | (13 << 16)))
7480 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7481 else
7482 abort ();
7483 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7484 /* add -> addi. */
7485 insn = 14 << 26;
7486 else if ((insn & (31 << 1)) == 23 << 1
7487 && ((insn & (31 << 6)) < 14 << 6
7488 || ((insn & (31 << 6)) >= 16 << 6
7489 && (insn & (31 << 6)) < 24 << 6)))
7490 /* load and store indexed -> dform. */
7491 insn = (32 | ((insn >> 6) & 31)) << 26;
7492 else if ((insn & (31 << 1)) == 21 << 1
7493 && (insn & (0x1a << 6)) == 0)
7494 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7495 insn = (((58 | ((insn >> 6) & 4)) << 26)
7496 | ((insn >> 6) & 1));
7497 else if ((insn & (31 << 1)) == 21 << 1
7498 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7499 /* lwax -> lwa. */
7500 insn = (58 << 26) | 2;
7501 else
7502 abort ();
7503 insn |= rtra;
7504 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7505 r_type = R_PPC64_TPREL16_LO;
7506 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7507 /* Was PPC64_TLS which sits on insn boundary, now
7508 PPC64_TPREL16_LO which is at insn+2. */
7509 rel->r_offset += 2;
7510 }
7511 break;
7512
7513 case R_PPC64_GOT_TLSGD16_HI:
7514 case R_PPC64_GOT_TLSGD16_HA:
7515 tls_gd = TLS_TPRELGD;
7516 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7517 goto tls_gdld_hi;
7518 break;
7519
7520 case R_PPC64_GOT_TLSLD16_HI:
7521 case R_PPC64_GOT_TLSLD16_HA:
7522 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7523 {
7524 tls_gdld_hi:
7525 if ((tls_mask & tls_gd) != 0)
7526 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7527 + R_PPC64_GOT_TPREL16_DS);
7528 else
7529 {
7530 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7531 rel->r_offset -= 2;
7532 r_type = R_PPC64_NONE;
7533 }
7534 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7535 }
7536 break;
7537
7538 case R_PPC64_GOT_TLSGD16:
7539 case R_PPC64_GOT_TLSGD16_LO:
7540 tls_gd = TLS_TPRELGD;
7541 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7542 goto tls_get_addr_check;
7543 break;
7544
7545 case R_PPC64_GOT_TLSLD16:
7546 case R_PPC64_GOT_TLSLD16_LO:
7547 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7548 {
7549 tls_get_addr_check:
7550 if (rel + 1 < relend)
7551 {
7552 enum elf_ppc64_reloc_type r_type2;
7553 unsigned long r_symndx2;
7554 struct elf_link_hash_entry *h2;
7555 bfd_vma insn1, insn2, insn3;
7556 bfd_vma offset;
7557
7558 /* The next instruction should be a call to
7559 __tls_get_addr. Peek at the reloc to be sure. */
7560 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7561 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7562 if (r_symndx2 < symtab_hdr->sh_info
7563 || (r_type2 != R_PPC64_REL14
7564 && r_type2 != R_PPC64_REL14_BRTAKEN
7565 && r_type2 != R_PPC64_REL14_BRNTAKEN
7566 && r_type2 != R_PPC64_REL24))
7567 break;
7568
7569 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7570 while (h2->root.type == bfd_link_hash_indirect
7571 || h2->root.type == bfd_link_hash_warning)
7572 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7573 if (h2 == NULL || h2 != htab->tls_get_addr)
7574 break;
7575
7576 /* OK, it checks out. Replace the call. */
7577 offset = rel[1].r_offset;
7578 insn1 = bfd_get_32 (output_bfd,
7579 contents + rel->r_offset - 2);
7580 insn3 = bfd_get_32 (output_bfd,
7581 contents + offset + 4);
7582 if ((tls_mask & tls_gd) != 0)
7583 {
7584 /* IE */
7585 insn1 &= (1 << 26) - (1 << 2);
7586 insn1 |= 58 << 26; /* ld */
7587 insn2 = 0x7c636a14; /* add 3,3,13 */
7588 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7589 if ((tls_mask & TLS_EXPLICIT) == 0)
7590 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7591 + R_PPC64_GOT_TPREL16_DS);
7592 else
7593 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7594 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7595 }
7596 else
7597 {
7598 /* LE */
7599 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7600 insn2 = 0x38630000; /* addi 3,3,0 */
7601 if (tls_gd == 0)
7602 {
7603 /* Was an LD reloc. */
7604 r_symndx = 0;
7605 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
7606 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
7607 }
7608 r_type = R_PPC64_TPREL16_HA;
7609 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7610 rel[1].r_info = ELF64_R_INFO (r_symndx,
7611 R_PPC64_TPREL16_LO);
7612 rel[1].r_offset += 2;
7613 }
7614 if (insn3 == NOP
7615 || insn3 == CROR_151515 || insn3 == CROR_313131)
7616 {
7617 insn3 = insn2;
7618 insn2 = NOP;
7619 rel[1].r_offset += 4;
7620 }
7621 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7622 bfd_put_32 (output_bfd, insn2, contents + offset);
7623 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7624 if (tls_gd == 0)
7625 {
7626 /* We changed the symbol on an LD reloc. Start over
7627 in order to get h, sym, sec etc. right. */
7628 rel--;
7629 continue;
7630 }
7631 }
7632 }
7633 break;
7634
7635 case R_PPC64_DTPMOD64:
7636 if (rel + 1 < relend
7637 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7638 && rel[1].r_offset == rel->r_offset + 8)
7639 {
7640 if ((tls_mask & TLS_GD) == 0)
7641 {
7642 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7643 if ((tls_mask & TLS_TPRELGD) != 0)
7644 r_type = R_PPC64_TPREL64;
7645 else
7646 {
7647 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7648 r_type = R_PPC64_NONE;
7649 }
7650 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7651 }
7652 }
7653 else
7654 {
7655 if ((tls_mask & TLS_LD) == 0)
7656 {
7657 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7658 r_type = R_PPC64_NONE;
7659 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7660 }
7661 }
7662 break;
7663
7664 case R_PPC64_TPREL64:
7665 if ((tls_mask & TLS_TPREL) == 0)
7666 {
7667 r_type = R_PPC64_NONE;
7668 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7669 }
7670 break;
7671 }
7672
7673 /* Handle other relocations that tweak non-addend part of insn. */
7674 insn = 0;
7675 switch (r_type)
7676 {
7677 default:
7678 break;
7679
7680 /* Branch taken prediction relocations. */
7681 case R_PPC64_ADDR14_BRTAKEN:
7682 case R_PPC64_REL14_BRTAKEN:
7683 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7684 /* Fall thru. */
7685
7686 /* Branch not taken prediction relocations. */
7687 case R_PPC64_ADDR14_BRNTAKEN:
7688 case R_PPC64_REL14_BRNTAKEN:
7689 insn |= bfd_get_32 (output_bfd,
7690 contents + rel->r_offset) & ~(0x01 << 21);
7691 if (is_power4)
7692 {
7693 /* Set 'a' bit. This is 0b00010 in BO field for branch
7694 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7695 for branch on CTR insns (BO == 1a00t or 1a01t). */
7696 if ((insn & (0x14 << 21)) == (0x04 << 21))
7697 insn |= 0x02 << 21;
7698 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7699 insn |= 0x08 << 21;
7700 else
7701 break;
7702 }
7703 else
7704 {
7705 from = (rel->r_offset
7706 + input_section->output_offset
7707 + input_section->output_section->vma);
7708
7709 /* Invert 'y' bit if not the default. */
7710 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7711 insn ^= 0x01 << 21;
7712 }
7713
7714 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7715 break;
7716
7717 case R_PPC64_REL24:
7718 /* Calls to functions with a different TOC, such as calls to
7719 shared objects, need to alter the TOC pointer. This is
7720 done using a linkage stub. A REL24 branching to these
7721 linkage stubs needs to be followed by a nop, as the nop
7722 will be replaced with an instruction to restore the TOC
7723 base pointer. */
7724 if (((h != NULL
7725 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7726 && fdh->plt.plist != NULL)
7727 || ((fdh = h, sec) != NULL
7728 && sec->output_section != NULL
7729 && (htab->stub_group[sec->id].toc_off
7730 != htab->stub_group[input_section->id].toc_off)))
7731 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7732 rel, htab)) != NULL
7733 && (stub_entry->stub_type == ppc_stub_plt_call
7734 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7735 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7736 {
7737 bfd_boolean can_plt_call = 0;
7738
7739 if (rel->r_offset + 8 <= input_section->_cooked_size)
7740 {
7741 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7742 if (insn == NOP
7743 || insn == CROR_151515 || insn == CROR_313131)
7744 {
7745 bfd_put_32 (input_bfd, LD_R2_40R1,
7746 contents + rel->r_offset + 4);
7747 can_plt_call = 1;
7748 }
7749 }
7750
7751 if (!can_plt_call)
7752 {
7753 if (stub_entry->stub_type == ppc_stub_plt_call)
7754 {
7755 /* If this is a plain branch rather than a branch
7756 and link, don't require a nop. */
7757 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7758 if ((insn & 1) == 0)
7759 can_plt_call = 1;
7760 }
7761 else if (h != NULL
7762 && strcmp (h->root.root.string,
7763 ".__libc_start_main") == 0)
7764 {
7765 /* Allow crt1 branch to go via a toc adjusting stub. */
7766 can_plt_call = 1;
7767 }
7768 else
7769 {
7770 if (strcmp (input_section->output_section->name,
7771 ".init") == 0
7772 || strcmp (input_section->output_section->name,
7773 ".fini") == 0)
7774 (*_bfd_error_handler)
7775 (_("%s(%s+0x%lx): automatic multiple TOCs "
7776 "not supported using your crt files; "
7777 "recompile with -mminimal-toc or upgrade gcc"),
7778 bfd_archive_filename (input_bfd),
7779 input_section->name,
7780 (long) rel->r_offset);
7781 else
7782 (*_bfd_error_handler)
7783 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7784 "does not allow automatic multiple TOCs; "
7785 "recompile with -mminimal-toc or "
7786 "-fno-optimize-sibling-calls, "
7787 "or make `%s' extern"),
7788 bfd_archive_filename (input_bfd),
7789 input_section->name,
7790 (long) rel->r_offset,
7791 sym_name,
7792 sym_name);
7793 bfd_set_error (bfd_error_bad_value);
7794 ret = FALSE;
7795 }
7796 }
7797
7798 if (can_plt_call)
7799 {
7800 relocation = (stub_entry->stub_offset
7801 + stub_entry->stub_sec->output_offset
7802 + stub_entry->stub_sec->output_section->vma);
7803 if (stub_entry->stub_type == ppc_stub_plt_call)
7804 unresolved_reloc = FALSE;
7805 }
7806 }
7807
7808 if (h != NULL
7809 && h->root.type == bfd_link_hash_undefweak
7810 && relocation == 0
7811 && rel->r_addend == 0)
7812 {
7813 /* Tweak calls to undefined weak functions to point at a
7814 blr. We can thus call a weak function without first
7815 checking whether the function is defined. We have a
7816 blr at the end of .sfpr. */
7817 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7818 relocation = (htab->sfpr->_raw_size - 4
7819 + htab->sfpr->output_offset
7820 + htab->sfpr->output_section->vma);
7821 from = (rel->r_offset
7822 + input_section->output_offset
7823 + input_section->output_section->vma);
7824
7825 /* But let's not be silly about it. If the blr isn't in
7826 reach, just go to the next instruction. */
7827 if (relocation - from + (1 << 25) >= (1 << 26)
7828 || htab->sfpr->_raw_size == 0)
7829 relocation = from + 4;
7830 }
7831 break;
7832 }
7833
7834 /* Set `addend'. */
7835 tls_type = 0;
7836 addend = rel->r_addend;
7837 switch (r_type)
7838 {
7839 default:
7840 (*_bfd_error_handler)
7841 (_("%s: unknown relocation type %d for symbol %s"),
7842 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7843
7844 bfd_set_error (bfd_error_bad_value);
7845 ret = FALSE;
7846 continue;
7847
7848 case R_PPC64_NONE:
7849 case R_PPC64_TLS:
7850 case R_PPC64_GNU_VTINHERIT:
7851 case R_PPC64_GNU_VTENTRY:
7852 continue;
7853
7854 /* GOT16 relocations. Like an ADDR16 using the symbol's
7855 address in the GOT as relocation value instead of the
7856 symbol's value itself. Also, create a GOT entry for the
7857 symbol and put the symbol value there. */
7858 case R_PPC64_GOT_TLSGD16:
7859 case R_PPC64_GOT_TLSGD16_LO:
7860 case R_PPC64_GOT_TLSGD16_HI:
7861 case R_PPC64_GOT_TLSGD16_HA:
7862 tls_type = TLS_TLS | TLS_GD;
7863 goto dogot;
7864
7865 case R_PPC64_GOT_TLSLD16:
7866 case R_PPC64_GOT_TLSLD16_LO:
7867 case R_PPC64_GOT_TLSLD16_HI:
7868 case R_PPC64_GOT_TLSLD16_HA:
7869 tls_type = TLS_TLS | TLS_LD;
7870 goto dogot;
7871
7872 case R_PPC64_GOT_TPREL16_DS:
7873 case R_PPC64_GOT_TPREL16_LO_DS:
7874 case R_PPC64_GOT_TPREL16_HI:
7875 case R_PPC64_GOT_TPREL16_HA:
7876 tls_type = TLS_TLS | TLS_TPREL;
7877 goto dogot;
7878
7879 case R_PPC64_GOT_DTPREL16_DS:
7880 case R_PPC64_GOT_DTPREL16_LO_DS:
7881 case R_PPC64_GOT_DTPREL16_HI:
7882 case R_PPC64_GOT_DTPREL16_HA:
7883 tls_type = TLS_TLS | TLS_DTPREL;
7884 goto dogot;
7885
7886 case R_PPC64_GOT16:
7887 case R_PPC64_GOT16_LO:
7888 case R_PPC64_GOT16_HI:
7889 case R_PPC64_GOT16_HA:
7890 case R_PPC64_GOT16_DS:
7891 case R_PPC64_GOT16_LO_DS:
7892 dogot:
7893 {
7894 /* Relocation is to the entry for this symbol in the global
7895 offset table. */
7896 asection *got;
7897 bfd_vma *offp;
7898 bfd_vma off;
7899 unsigned long indx = 0;
7900
7901 if (tls_type == (TLS_TLS | TLS_LD)
7902 && (h == NULL
7903 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
7904 offp = &ppc64_tlsld_got (input_bfd)->offset;
7905 else
7906 {
7907 struct got_entry *ent;
7908
7909 if (h != NULL)
7910 {
7911 bfd_boolean dyn = htab->elf.dynamic_sections_created;
7912 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7913 || (info->shared
7914 && SYMBOL_REFERENCES_LOCAL (info, h)))
7915 /* This is actually a static link, or it is a
7916 -Bsymbolic link and the symbol is defined
7917 locally, or the symbol was forced to be local
7918 because of a version file. */
7919 ;
7920 else
7921 {
7922 indx = h->dynindx;
7923 unresolved_reloc = FALSE;
7924 }
7925 ent = h->got.glist;
7926 }
7927 else
7928 {
7929 if (local_got_ents == NULL)
7930 abort ();
7931 ent = local_got_ents[r_symndx];
7932 }
7933
7934 for (; ent != NULL; ent = ent->next)
7935 if (ent->addend == rel->r_addend
7936 && ent->owner == input_bfd
7937 && ent->tls_type == tls_type)
7938 break;
7939 if (ent == NULL)
7940 abort ();
7941 offp = &ent->got.offset;
7942 }
7943
7944 got = ppc64_elf_tdata (input_bfd)->got;
7945 if (got == NULL)
7946 abort ();
7947
7948 /* The offset must always be a multiple of 8. We use the
7949 least significant bit to record whether we have already
7950 processed this entry. */
7951 off = *offp;
7952 if ((off & 1) != 0)
7953 off &= ~1;
7954 else
7955 {
7956 /* Generate relocs for the dynamic linker, except in
7957 the case of TLSLD where we'll use one entry per
7958 module. */
7959 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
7960
7961 *offp = off | 1;
7962 if ((info->shared || indx != 0)
7963 && (h == NULL
7964 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7965 || h->root.type != bfd_link_hash_undefweak))
7966 {
7967 outrel.r_offset = (got->output_section->vma
7968 + got->output_offset
7969 + off);
7970 outrel.r_addend = rel->r_addend;
7971 if (tls_type & (TLS_LD | TLS_GD))
7972 {
7973 outrel.r_addend = 0;
7974 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
7975 if (tls_type == (TLS_TLS | TLS_GD))
7976 {
7977 loc = relgot->contents;
7978 loc += (relgot->reloc_count++
7979 * sizeof (Elf64_External_Rela));
7980 bfd_elf64_swap_reloca_out (output_bfd,
7981 &outrel, loc);
7982 outrel.r_offset += 8;
7983 outrel.r_addend = rel->r_addend;
7984 outrel.r_info
7985 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
7986 }
7987 }
7988 else if (tls_type == (TLS_TLS | TLS_DTPREL))
7989 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
7990 else if (tls_type == (TLS_TLS | TLS_TPREL))
7991 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
7992 else if (indx == 0)
7993 {
7994 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
7995
7996 /* Write the .got section contents for the sake
7997 of prelink. */
7998 loc = got->contents + off;
7999 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8000 loc);
8001 }
8002 else
8003 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8004
8005 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8006 {
8007 outrel.r_addend += relocation;
8008 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8009 outrel.r_addend -= htab->tls_sec->vma;
8010 }
8011 loc = relgot->contents;
8012 loc += (relgot->reloc_count++
8013 * sizeof (Elf64_External_Rela));
8014 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8015 }
8016
8017 /* Init the .got section contents here if we're not
8018 emitting a reloc. */
8019 else
8020 {
8021 relocation += rel->r_addend;
8022 if (tls_type == (TLS_TLS | TLS_LD))
8023 relocation = 1;
8024 else if (tls_type != 0)
8025 {
8026 relocation -= htab->tls_sec->vma + DTP_OFFSET;
8027 if (tls_type == (TLS_TLS | TLS_TPREL))
8028 relocation += DTP_OFFSET - TP_OFFSET;
8029
8030 if (tls_type == (TLS_TLS | TLS_GD))
8031 {
8032 bfd_put_64 (output_bfd, relocation,
8033 got->contents + off + 8);
8034 relocation = 1;
8035 }
8036 }
8037
8038 bfd_put_64 (output_bfd, relocation,
8039 got->contents + off);
8040 }
8041 }
8042
8043 if (off >= (bfd_vma) -2)
8044 abort ();
8045
8046 relocation = got->output_offset + off;
8047
8048 /* TOC base (r2) is TOC start plus 0x8000. */
8049 addend = -TOC_BASE_OFF;
8050 }
8051 break;
8052
8053 case R_PPC64_PLT16_HA:
8054 case R_PPC64_PLT16_HI:
8055 case R_PPC64_PLT16_LO:
8056 case R_PPC64_PLT32:
8057 case R_PPC64_PLT64:
8058 /* Relocation is to the entry for this symbol in the
8059 procedure linkage table. */
8060
8061 /* Resolve a PLT reloc against a local symbol directly,
8062 without using the procedure linkage table. */
8063 if (h == NULL)
8064 break;
8065
8066 /* It's possible that we didn't make a PLT entry for this
8067 symbol. This happens when statically linking PIC code,
8068 or when using -Bsymbolic. Go find a match if there is a
8069 PLT entry. */
8070 if (htab->plt != NULL)
8071 {
8072 struct plt_entry *ent;
8073 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8074 if (ent->addend == rel->r_addend
8075 && ent->plt.offset != (bfd_vma) -1)
8076 {
8077 relocation = (htab->plt->output_section->vma
8078 + htab->plt->output_offset
8079 + ent->plt.offset);
8080 unresolved_reloc = FALSE;
8081 }
8082 }
8083 break;
8084
8085 case R_PPC64_TOC:
8086 /* Relocation value is TOC base. */
8087 relocation = TOCstart;
8088 if (r_symndx == 0)
8089 relocation += htab->stub_group[input_section->id].toc_off;
8090 else if (sec != NULL && !unresolved_reloc)
8091 relocation += htab->stub_group[sec->id].toc_off;
8092 else
8093 unresolved_reloc = TRUE;
8094 goto dodyn2;
8095
8096 /* TOC16 relocs. We want the offset relative to the TOC base,
8097 which is the address of the start of the TOC plus 0x8000.
8098 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8099 in this order. */
8100 case R_PPC64_TOC16:
8101 case R_PPC64_TOC16_LO:
8102 case R_PPC64_TOC16_HI:
8103 case R_PPC64_TOC16_DS:
8104 case R_PPC64_TOC16_LO_DS:
8105 case R_PPC64_TOC16_HA:
8106 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8107 break;
8108
8109 /* Relocate against the beginning of the section. */
8110 case R_PPC64_SECTOFF:
8111 case R_PPC64_SECTOFF_LO:
8112 case R_PPC64_SECTOFF_HI:
8113 case R_PPC64_SECTOFF_DS:
8114 case R_PPC64_SECTOFF_LO_DS:
8115 case R_PPC64_SECTOFF_HA:
8116 if (sec != NULL)
8117 addend -= sec->output_section->vma;
8118 break;
8119
8120 case R_PPC64_REL14:
8121 case R_PPC64_REL14_BRNTAKEN:
8122 case R_PPC64_REL14_BRTAKEN:
8123 case R_PPC64_REL24:
8124 break;
8125
8126 case R_PPC64_TPREL16:
8127 case R_PPC64_TPREL16_LO:
8128 case R_PPC64_TPREL16_HI:
8129 case R_PPC64_TPREL16_HA:
8130 case R_PPC64_TPREL16_DS:
8131 case R_PPC64_TPREL16_LO_DS:
8132 case R_PPC64_TPREL16_HIGHER:
8133 case R_PPC64_TPREL16_HIGHERA:
8134 case R_PPC64_TPREL16_HIGHEST:
8135 case R_PPC64_TPREL16_HIGHESTA:
8136 addend -= htab->tls_sec->vma + TP_OFFSET;
8137 if (info->shared)
8138 /* The TPREL16 relocs shouldn't really be used in shared
8139 libs as they will result in DT_TEXTREL being set, but
8140 support them anyway. */
8141 goto dodyn;
8142 break;
8143
8144 case R_PPC64_DTPREL16:
8145 case R_PPC64_DTPREL16_LO:
8146 case R_PPC64_DTPREL16_HI:
8147 case R_PPC64_DTPREL16_HA:
8148 case R_PPC64_DTPREL16_DS:
8149 case R_PPC64_DTPREL16_LO_DS:
8150 case R_PPC64_DTPREL16_HIGHER:
8151 case R_PPC64_DTPREL16_HIGHERA:
8152 case R_PPC64_DTPREL16_HIGHEST:
8153 case R_PPC64_DTPREL16_HIGHESTA:
8154 addend -= htab->tls_sec->vma + DTP_OFFSET;
8155 break;
8156
8157 case R_PPC64_DTPMOD64:
8158 relocation = 1;
8159 addend = 0;
8160 goto dodyn;
8161
8162 case R_PPC64_TPREL64:
8163 addend -= htab->tls_sec->vma + TP_OFFSET;
8164 goto dodyn;
8165
8166 case R_PPC64_DTPREL64:
8167 addend -= htab->tls_sec->vma + DTP_OFFSET;
8168 /* Fall thru */
8169
8170 /* Relocations that may need to be propagated if this is a
8171 dynamic object. */
8172 case R_PPC64_REL30:
8173 case R_PPC64_REL32:
8174 case R_PPC64_REL64:
8175 case R_PPC64_ADDR14:
8176 case R_PPC64_ADDR14_BRNTAKEN:
8177 case R_PPC64_ADDR14_BRTAKEN:
8178 case R_PPC64_ADDR16:
8179 case R_PPC64_ADDR16_DS:
8180 case R_PPC64_ADDR16_HA:
8181 case R_PPC64_ADDR16_HI:
8182 case R_PPC64_ADDR16_HIGHER:
8183 case R_PPC64_ADDR16_HIGHERA:
8184 case R_PPC64_ADDR16_HIGHEST:
8185 case R_PPC64_ADDR16_HIGHESTA:
8186 case R_PPC64_ADDR16_LO:
8187 case R_PPC64_ADDR16_LO_DS:
8188 case R_PPC64_ADDR24:
8189 case R_PPC64_ADDR32:
8190 case R_PPC64_ADDR64:
8191 case R_PPC64_UADDR16:
8192 case R_PPC64_UADDR32:
8193 case R_PPC64_UADDR64:
8194 /* r_symndx will be zero only for relocs against symbols
8195 from removed linkonce sections, or sections discarded by
8196 a linker script. */
8197 dodyn:
8198 if (r_symndx == 0)
8199 break;
8200 /* Fall thru. */
8201
8202 dodyn2:
8203 if ((input_section->flags & SEC_ALLOC) == 0)
8204 break;
8205
8206 if (NO_OPD_RELOCS && is_opd)
8207 break;
8208
8209 if ((info->shared
8210 && (h == NULL
8211 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8212 || h->root.type != bfd_link_hash_undefweak)
8213 && (MUST_BE_DYN_RELOC (r_type)
8214 || !SYMBOL_CALLS_LOCAL (info, h)))
8215 || (ELIMINATE_COPY_RELOCS
8216 && !info->shared
8217 && h != NULL
8218 && h->dynindx != -1
8219 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8220 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8221 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8222 {
8223 Elf_Internal_Rela outrel;
8224 bfd_boolean skip, relocate;
8225 asection *sreloc;
8226 bfd_byte *loc;
8227 bfd_vma out_off;
8228
8229 /* When generating a dynamic object, these relocations
8230 are copied into the output file to be resolved at run
8231 time. */
8232
8233 skip = FALSE;
8234 relocate = FALSE;
8235
8236 out_off = _bfd_elf_section_offset (output_bfd, info,
8237 input_section, rel->r_offset);
8238 if (out_off == (bfd_vma) -1)
8239 skip = TRUE;
8240 else if (out_off == (bfd_vma) -2)
8241 skip = TRUE, relocate = TRUE;
8242 out_off += (input_section->output_section->vma
8243 + input_section->output_offset);
8244 outrel.r_offset = out_off;
8245 outrel.r_addend = rel->r_addend;
8246
8247 /* Optimize unaligned reloc use. */
8248 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8249 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8250 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8251 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8252 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8253 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8254 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8255 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8256 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8257
8258 if (skip)
8259 memset (&outrel, 0, sizeof outrel);
8260 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8261 && !is_opd
8262 && r_type != R_PPC64_TOC)
8263 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8264 else
8265 {
8266 /* This symbol is local, or marked to become local,
8267 or this is an opd section reloc which must point
8268 at a local function. */
8269 outrel.r_addend += relocation;
8270 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8271 {
8272 if (is_opd && h != NULL)
8273 {
8274 /* Lie about opd entries. This case occurs
8275 when building shared libraries and we
8276 reference a function in another shared
8277 lib. The same thing happens for a weak
8278 definition in an application that's
8279 overridden by a strong definition in a
8280 shared lib. (I believe this is a generic
8281 bug in binutils handling of weak syms.)
8282 In these cases we won't use the opd
8283 entry in this lib. */
8284 unresolved_reloc = FALSE;
8285 }
8286 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8287
8288 /* We need to relocate .opd contents for ld.so.
8289 Prelink also wants simple and consistent rules
8290 for relocs. This make all RELATIVE relocs have
8291 *r_offset equal to r_addend. */
8292 relocate = TRUE;
8293 }
8294 else
8295 {
8296 long indx = 0;
8297
8298 if (bfd_is_abs_section (sec))
8299 ;
8300 else if (sec == NULL || sec->owner == NULL)
8301 {
8302 bfd_set_error (bfd_error_bad_value);
8303 return FALSE;
8304 }
8305 else
8306 {
8307 asection *osec;
8308
8309 osec = sec->output_section;
8310 indx = elf_section_data (osec)->dynindx;
8311
8312 /* We are turning this relocation into one
8313 against a section symbol, so subtract out
8314 the output section's address but not the
8315 offset of the input section in the output
8316 section. */
8317 outrel.r_addend -= osec->vma;
8318 }
8319
8320 outrel.r_info = ELF64_R_INFO (indx, r_type);
8321 }
8322 }
8323
8324 sreloc = elf_section_data (input_section)->sreloc;
8325 if (sreloc == NULL)
8326 abort ();
8327
8328 loc = sreloc->contents;
8329 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8330 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8331
8332 /* If this reloc is against an external symbol, it will
8333 be computed at runtime, so there's no need to do
8334 anything now. However, for the sake of prelink ensure
8335 that the section contents are a known value. */
8336 if (! relocate)
8337 {
8338 unresolved_reloc = FALSE;
8339 /* The value chosen here is quite arbitrary as ld.so
8340 ignores section contents except for the special
8341 case of .opd where the contents might be accessed
8342 before relocation. Choose zero, as that won't
8343 cause reloc overflow. */
8344 relocation = 0;
8345 addend = 0;
8346 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8347 to improve backward compatibility with older
8348 versions of ld. */
8349 if (r_type == R_PPC64_ADDR64)
8350 addend = outrel.r_addend;
8351 /* Adjust pc_relative relocs to have zero in *r_offset. */
8352 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8353 addend = (input_section->output_section->vma
8354 + input_section->output_offset
8355 + rel->r_offset);
8356 }
8357 }
8358 break;
8359
8360 case R_PPC64_COPY:
8361 case R_PPC64_GLOB_DAT:
8362 case R_PPC64_JMP_SLOT:
8363 case R_PPC64_RELATIVE:
8364 /* We shouldn't ever see these dynamic relocs in relocatable
8365 files. */
8366 /* Fall through. */
8367
8368 case R_PPC64_PLTGOT16:
8369 case R_PPC64_PLTGOT16_DS:
8370 case R_PPC64_PLTGOT16_HA:
8371 case R_PPC64_PLTGOT16_HI:
8372 case R_PPC64_PLTGOT16_LO:
8373 case R_PPC64_PLTGOT16_LO_DS:
8374 case R_PPC64_PLTREL32:
8375 case R_PPC64_PLTREL64:
8376 /* These ones haven't been implemented yet. */
8377
8378 (*_bfd_error_handler)
8379 (_("%s: relocation %s is not supported for symbol %s."),
8380 bfd_archive_filename (input_bfd),
8381 ppc64_elf_howto_table[r_type]->name, sym_name);
8382
8383 bfd_set_error (bfd_error_invalid_operation);
8384 ret = FALSE;
8385 continue;
8386 }
8387
8388 /* Do any further special processing. */
8389 switch (r_type)
8390 {
8391 default:
8392 break;
8393
8394 case R_PPC64_ADDR16_HA:
8395 case R_PPC64_ADDR16_HIGHERA:
8396 case R_PPC64_ADDR16_HIGHESTA:
8397 case R_PPC64_GOT16_HA:
8398 case R_PPC64_PLTGOT16_HA:
8399 case R_PPC64_PLT16_HA:
8400 case R_PPC64_TOC16_HA:
8401 case R_PPC64_SECTOFF_HA:
8402 case R_PPC64_TPREL16_HA:
8403 case R_PPC64_DTPREL16_HA:
8404 case R_PPC64_GOT_TLSGD16_HA:
8405 case R_PPC64_GOT_TLSLD16_HA:
8406 case R_PPC64_GOT_TPREL16_HA:
8407 case R_PPC64_GOT_DTPREL16_HA:
8408 case R_PPC64_TPREL16_HIGHER:
8409 case R_PPC64_TPREL16_HIGHERA:
8410 case R_PPC64_TPREL16_HIGHEST:
8411 case R_PPC64_TPREL16_HIGHESTA:
8412 case R_PPC64_DTPREL16_HIGHER:
8413 case R_PPC64_DTPREL16_HIGHERA:
8414 case R_PPC64_DTPREL16_HIGHEST:
8415 case R_PPC64_DTPREL16_HIGHESTA:
8416 /* It's just possible that this symbol is a weak symbol
8417 that's not actually defined anywhere. In that case,
8418 'sec' would be NULL, and we should leave the symbol
8419 alone (it will be set to zero elsewhere in the link). */
8420 if (sec != NULL)
8421 /* Add 0x10000 if sign bit in 0:15 is set.
8422 Bits 0:15 are not used. */
8423 addend += 0x8000;
8424 break;
8425
8426 case R_PPC64_ADDR16_DS:
8427 case R_PPC64_ADDR16_LO_DS:
8428 case R_PPC64_GOT16_DS:
8429 case R_PPC64_GOT16_LO_DS:
8430 case R_PPC64_PLT16_LO_DS:
8431 case R_PPC64_SECTOFF_DS:
8432 case R_PPC64_SECTOFF_LO_DS:
8433 case R_PPC64_TOC16_DS:
8434 case R_PPC64_TOC16_LO_DS:
8435 case R_PPC64_PLTGOT16_DS:
8436 case R_PPC64_PLTGOT16_LO_DS:
8437 case R_PPC64_GOT_TPREL16_DS:
8438 case R_PPC64_GOT_TPREL16_LO_DS:
8439 case R_PPC64_GOT_DTPREL16_DS:
8440 case R_PPC64_GOT_DTPREL16_LO_DS:
8441 case R_PPC64_TPREL16_DS:
8442 case R_PPC64_TPREL16_LO_DS:
8443 case R_PPC64_DTPREL16_DS:
8444 case R_PPC64_DTPREL16_LO_DS:
8445 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8446 mask = 3;
8447 /* If this reloc is against an lq insn, then the value must be
8448 a multiple of 16. This is somewhat of a hack, but the
8449 "correct" way to do this by defining _DQ forms of all the
8450 _DS relocs bloats all reloc switches in this file. It
8451 doesn't seem to make much sense to use any of these relocs
8452 in data, so testing the insn should be safe. */
8453 if ((insn & (0x3f << 26)) == (56u << 26))
8454 mask = 15;
8455 if (((relocation + addend) & mask) != 0)
8456 {
8457 (*_bfd_error_handler)
8458 (_("%s: error: relocation %s not a multiple of %d"),
8459 bfd_archive_filename (input_bfd),
8460 ppc64_elf_howto_table[r_type]->name,
8461 mask + 1);
8462 bfd_set_error (bfd_error_bad_value);
8463 ret = FALSE;
8464 continue;
8465 }
8466 break;
8467
8468 case R_PPC64_REL14:
8469 case R_PPC64_REL14_BRNTAKEN:
8470 case R_PPC64_REL14_BRTAKEN:
8471 max_br_offset = 1 << 15;
8472 goto branch_check;
8473
8474 case R_PPC64_REL24:
8475 max_br_offset = 1 << 25;
8476
8477 branch_check:
8478 /* If the branch is out of reach or the TOC register needs
8479 adjusting, then redirect the call to the local stub for
8480 this function. */
8481 from = (rel->r_offset
8482 + input_section->output_offset
8483 + input_section->output_section->vma);
8484 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8485 || (sec != NULL
8486 && sec->output_section != NULL
8487 && sec->id <= htab->top_id
8488 && (htab->stub_group[sec->id].toc_off
8489 != htab->stub_group[input_section->id].toc_off)))
8490 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8491 rel, htab)) != NULL)
8492 {
8493 /* Munge up the value and addend so that we call the stub
8494 rather than the procedure directly. */
8495 relocation = (stub_entry->stub_offset
8496 + stub_entry->stub_sec->output_offset
8497 + stub_entry->stub_sec->output_section->vma);
8498 addend = 0;
8499 }
8500 break;
8501 }
8502
8503 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8504 because such sections are not SEC_ALLOC and thus ld.so will
8505 not process them. */
8506 if (unresolved_reloc
8507 && !((input_section->flags & SEC_DEBUGGING) != 0
8508 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8509 {
8510 (*_bfd_error_handler)
8511 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8512 bfd_archive_filename (input_bfd),
8513 bfd_get_section_name (input_bfd, input_section),
8514 (long) rel->r_offset,
8515 ppc64_elf_howto_table[(int) r_type]->name,
8516 h->root.root.string);
8517 ret = FALSE;
8518 }
8519
8520 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8521 input_bfd,
8522 input_section,
8523 contents,
8524 rel->r_offset,
8525 relocation,
8526 addend);
8527
8528 if (r != bfd_reloc_ok)
8529 {
8530 if (sym_name == NULL)
8531 sym_name = "(null)";
8532 if (r == bfd_reloc_overflow)
8533 {
8534 if (warned)
8535 continue;
8536 if (h != NULL
8537 && h->root.type == bfd_link_hash_undefweak
8538 && ppc64_elf_howto_table[r_type]->pc_relative)
8539 {
8540 /* Assume this is a call protected by other code that
8541 detects the symbol is undefined. If this is the case,
8542 we can safely ignore the overflow. If not, the
8543 program is hosed anyway, and a little warning isn't
8544 going to help. */
8545
8546 continue;
8547 }
8548
8549 if (!((*info->callbacks->reloc_overflow)
8550 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8551 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8552 return FALSE;
8553 }
8554 else
8555 {
8556 (*_bfd_error_handler)
8557 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8558 bfd_archive_filename (input_bfd),
8559 bfd_get_section_name (input_bfd, input_section),
8560 (long) rel->r_offset,
8561 ppc64_elf_howto_table[r_type]->name,
8562 sym_name,
8563 (int) r);
8564 ret = FALSE;
8565 }
8566 }
8567 }
8568
8569 return ret;
8570 }
8571
8572 /* Finish up dynamic symbol handling. We set the contents of various
8573 dynamic sections here. */
8574
8575 static bfd_boolean
8576 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8577 struct bfd_link_info *info,
8578 struct elf_link_hash_entry *h,
8579 Elf_Internal_Sym *sym)
8580 {
8581 struct ppc_link_hash_table *htab;
8582 bfd *dynobj;
8583
8584 htab = ppc_hash_table (info);
8585 dynobj = htab->elf.dynobj;
8586
8587 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8588 {
8589 struct plt_entry *ent;
8590 Elf_Internal_Rela rela;
8591 bfd_byte *loc;
8592
8593 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8594 if (ent->plt.offset != (bfd_vma) -1)
8595 {
8596 /* This symbol has an entry in the procedure linkage
8597 table. Set it up. */
8598
8599 if (htab->plt == NULL
8600 || htab->relplt == NULL
8601 || htab->glink == NULL)
8602 abort ();
8603
8604 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8605 fill in the PLT entry. */
8606 rela.r_offset = (htab->plt->output_section->vma
8607 + htab->plt->output_offset
8608 + ent->plt.offset);
8609 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8610 rela.r_addend = ent->addend;
8611
8612 loc = htab->relplt->contents;
8613 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8614 * sizeof (Elf64_External_Rela));
8615 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8616 }
8617 }
8618
8619 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8620 {
8621 Elf_Internal_Rela rela;
8622 bfd_byte *loc;
8623
8624 /* This symbol needs a copy reloc. Set it up. */
8625
8626 if (h->dynindx == -1
8627 || (h->root.type != bfd_link_hash_defined
8628 && h->root.type != bfd_link_hash_defweak)
8629 || htab->relbss == NULL)
8630 abort ();
8631
8632 rela.r_offset = (h->root.u.def.value
8633 + h->root.u.def.section->output_section->vma
8634 + h->root.u.def.section->output_offset);
8635 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8636 rela.r_addend = 0;
8637 loc = htab->relbss->contents;
8638 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8639 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8640 }
8641
8642 /* Mark some specially defined symbols as absolute. */
8643 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8644 sym->st_shndx = SHN_ABS;
8645
8646 return TRUE;
8647 }
8648
8649 /* Used to decide how to sort relocs in an optimal manner for the
8650 dynamic linker, before writing them out. */
8651
8652 static enum elf_reloc_type_class
8653 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8654 {
8655 enum elf_ppc64_reloc_type r_type;
8656
8657 r_type = ELF64_R_TYPE (rela->r_info);
8658 switch (r_type)
8659 {
8660 case R_PPC64_RELATIVE:
8661 return reloc_class_relative;
8662 case R_PPC64_JMP_SLOT:
8663 return reloc_class_plt;
8664 case R_PPC64_COPY:
8665 return reloc_class_copy;
8666 default:
8667 return reloc_class_normal;
8668 }
8669 }
8670
8671 /* Finish up the dynamic sections. */
8672
8673 static bfd_boolean
8674 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8675 struct bfd_link_info *info)
8676 {
8677 struct ppc_link_hash_table *htab;
8678 bfd *dynobj;
8679 asection *sdyn;
8680
8681 htab = ppc_hash_table (info);
8682 dynobj = htab->elf.dynobj;
8683 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8684
8685 if (htab->elf.dynamic_sections_created)
8686 {
8687 Elf64_External_Dyn *dyncon, *dynconend;
8688
8689 if (sdyn == NULL || htab->got == NULL)
8690 abort ();
8691
8692 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8693 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8694 for (; dyncon < dynconend; dyncon++)
8695 {
8696 Elf_Internal_Dyn dyn;
8697 asection *s;
8698
8699 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8700
8701 switch (dyn.d_tag)
8702 {
8703 default:
8704 continue;
8705
8706 case DT_PPC64_GLINK:
8707 s = htab->glink;
8708 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8709 /* We stupidly defined DT_PPC64_GLINK to be the start
8710 of glink rather than the first entry point, which is
8711 what ld.so needs, and now have a bigger stub to
8712 support automatic multiple TOCs. */
8713 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8714 break;
8715
8716 case DT_PPC64_OPD:
8717 s = bfd_get_section_by_name (output_bfd, ".opd");
8718 if (s == NULL)
8719 continue;
8720 dyn.d_un.d_ptr = s->vma;
8721 break;
8722
8723 case DT_PPC64_OPDSZ:
8724 s = bfd_get_section_by_name (output_bfd, ".opd");
8725 if (s == NULL)
8726 continue;
8727 dyn.d_un.d_val = s->_raw_size;
8728 break;
8729
8730 case DT_PLTGOT:
8731 s = htab->plt;
8732 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8733 break;
8734
8735 case DT_JMPREL:
8736 s = htab->relplt;
8737 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8738 break;
8739
8740 case DT_PLTRELSZ:
8741 dyn.d_un.d_val = htab->relplt->_raw_size;
8742 break;
8743
8744 case DT_RELASZ:
8745 /* Don't count procedure linkage table relocs in the
8746 overall reloc count. */
8747 s = htab->relplt;
8748 if (s == NULL)
8749 continue;
8750 dyn.d_un.d_val -= s->_raw_size;
8751 break;
8752
8753 case DT_RELA:
8754 /* We may not be using the standard ELF linker script.
8755 If .rela.plt is the first .rela section, we adjust
8756 DT_RELA to not include it. */
8757 s = htab->relplt;
8758 if (s == NULL)
8759 continue;
8760 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8761 continue;
8762 dyn.d_un.d_ptr += s->_raw_size;
8763 break;
8764 }
8765
8766 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8767 }
8768 }
8769
8770 if (htab->got != NULL && htab->got->_raw_size != 0)
8771 {
8772 /* Fill in the first entry in the global offset table.
8773 We use it to hold the link-time TOCbase. */
8774 bfd_put_64 (output_bfd,
8775 elf_gp (output_bfd) + TOC_BASE_OFF,
8776 htab->got->contents);
8777
8778 /* Set .got entry size. */
8779 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8780 }
8781
8782 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8783 {
8784 /* Set .plt entry size. */
8785 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8786 = PLT_ENTRY_SIZE;
8787 }
8788
8789 /* We need to handle writing out multiple GOT sections ourselves,
8790 since we didn't add them to DYNOBJ. */
8791 while ((dynobj = dynobj->link_next) != NULL)
8792 {
8793 asection *s;
8794 s = ppc64_elf_tdata (dynobj)->got;
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 s = ppc64_elf_tdata (dynobj)->relgot;
8803 if (s != NULL
8804 && s->_raw_size != 0
8805 && s->output_section != bfd_abs_section_ptr
8806 && !bfd_set_section_contents (output_bfd, s->output_section,
8807 s->contents, s->output_offset,
8808 s->_raw_size))
8809 return FALSE;
8810 }
8811
8812 return TRUE;
8813 }
8814
8815 #include "elf64-target.h"
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