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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 /* The 64-bit PowerPC ELF ABI may be found at
23 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
24 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
25
26 #include "bfd.h"
27 #include "sysdep.h"
28 #include "bfdlink.h"
29 #include "libbfd.h"
30 #include "elf-bfd.h"
31 #include "elf/ppc.h"
32 #include "elf/ppc64.h"
33 #include "elf64-ppc.h"
34
35 static bfd_reloc_status_type ppc64_elf_ha_reloc
36 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_toc_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc64_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51
52
53 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
54 #define TARGET_LITTLE_NAME "elf64-powerpcle"
55 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
56 #define TARGET_BIG_NAME "elf64-powerpc"
57 #define ELF_ARCH bfd_arch_powerpc
58 #define ELF_MACHINE_CODE EM_PPC64
59 #define ELF_MAXPAGESIZE 0x10000
60 #define elf_info_to_howto ppc64_elf_info_to_howto
61
62 #define elf_backend_want_got_sym 0
63 #define elf_backend_want_plt_sym 0
64 #define elf_backend_plt_alignment 3
65 #define elf_backend_plt_not_loaded 1
66 #define elf_backend_got_symbol_offset 0
67 #define elf_backend_got_header_size 8
68 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
69 #define elf_backend_can_gc_sections 1
70 #define elf_backend_can_refcount 1
71 #define elf_backend_rela_normal 1
72
73 #define bfd_elf64_mkobject ppc64_elf_mkobject
74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
79
80 #define elf_backend_object_p ppc64_elf_object_p
81 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
82 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
83 #define elf_backend_check_relocs ppc64_elf_check_relocs
84 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
85 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
86 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
87 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
88 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
89 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
90 #define elf_backend_relocate_section ppc64_elf_relocate_section
91 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
92 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
93 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
94 #define elf_backend_special_sections ppc64_elf_special_sections
95
96 /* The name of the dynamic interpreter. This is put in the .interp
97 section. */
98 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
99
100 /* The size in bytes of an entry in the procedure linkage table. */
101 #define PLT_ENTRY_SIZE 24
102
103 /* The initial size of the plt reserved for the dynamic linker. */
104 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
105
106 /* TOC base pointers offset from start of TOC. */
107 #define TOC_BASE_OFF 0x8000
108
109 /* Offset of tp and dtp pointers from start of TLS block. */
110 #define TP_OFFSET 0x7000
111 #define DTP_OFFSET 0x8000
112
113 /* .plt call stub instructions. The normal stub is like this, but
114 sometimes the .plt entry crosses a 64k boundary and we need to
115 insert an addis to adjust r12. */
116 #define PLT_CALL_STUB_SIZE (7*4)
117 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
118 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
119 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
120 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
121 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
122 /* ld %r11,xxx+16@l(%r12) */
123 #define BCTR 0x4e800420 /* bctr */
124
125
126 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
127 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
128
129 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
130
131 /* glink call stub instructions. We enter with the index in R0, and the
132 address of glink entry in CTR. From that, we can calculate PLT0. */
133 #define GLINK_CALL_STUB_SIZE (16*4)
134 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
135 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
136 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
137 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
138 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
139 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
140 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
141 /* sub %r12,%r12,%r11 */
142 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
143 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
144 /* ld %r11,xxx@l(%r12) */
145 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
146 /* ld %r2,8(%r12) */
147 /* mtctr %r11 */
148 /* ld %r11,16(%r12) */
149 /* bctr */
150
151 /* Pad with this. */
152 #define NOP 0x60000000
153
154 /* Some other nops. */
155 #define CROR_151515 0x4def7b82
156 #define CROR_313131 0x4ffffb82
157
158 /* .glink entries for the first 32k functions are two instructions. */
159 #define LI_R0_0 0x38000000 /* li %r0,0 */
160 #define B_DOT 0x48000000 /* b . */
161
162 /* After that, we need two instructions to load the index, followed by
163 a branch. */
164 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
165 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
166
167 /* Instructions to save and restore floating point regs. */
168 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
169 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
170 #define BLR 0x4e800020 /* blr */
171
172 /* Since .opd is an array of descriptors and each entry will end up
173 with identical R_PPC64_RELATIVE relocs, there is really no need to
174 propagate .opd relocs; The dynamic linker should be taught to
175 relocate .opd without reloc entries. */
176 #ifndef NO_OPD_RELOCS
177 #define NO_OPD_RELOCS 0
178 #endif
179 \f
180 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
181
182 /* Relocation HOWTO's. */
183 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
184
185 static reloc_howto_type ppc64_elf_howto_raw[] = {
186 /* This reloc does nothing. */
187 HOWTO (R_PPC64_NONE, /* type */
188 0, /* rightshift */
189 2, /* size (0 = byte, 1 = short, 2 = long) */
190 32, /* bitsize */
191 FALSE, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_dont, /* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_PPC64_NONE", /* name */
196 FALSE, /* partial_inplace */
197 0, /* src_mask */
198 0, /* dst_mask */
199 FALSE), /* pcrel_offset */
200
201 /* A standard 32 bit relocation. */
202 HOWTO (R_PPC64_ADDR32, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 32, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC64_ADDR32", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0xffffffff, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* An absolute 26 bit branch; the lower two bits must be zero.
217 FIXME: we don't check that, we just clear them. */
218 HOWTO (R_PPC64_ADDR24, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 26, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_bitfield, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC64_ADDR24", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0x03fffffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 16 bit relocation. */
233 HOWTO (R_PPC64_ADDR16, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC64_ADDR16", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* A 16 bit relocation without overflow. */
248 HOWTO (R_PPC64_ADDR16_LO, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_dont,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC64_ADDR16_LO", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* Bits 16-31 of an address. */
263 HOWTO (R_PPC64_ADDR16_HI, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC64_ADDR16_HI", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
278 bits, treated as a signed number, is negative. */
279 HOWTO (R_PPC64_ADDR16_HA, /* type */
280 16, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont, /* complain_on_overflow */
286 ppc64_elf_ha_reloc, /* special_function */
287 "R_PPC64_ADDR16_HA", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch; the lower two bits must be zero.
294 FIXME: we don't check that, we just clear them. */
295 HOWTO (R_PPC64_ADDR14, /* type */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_bitfield, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR14", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0x0000fffc, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* An absolute 16 bit branch, for which bit 10 should be set to
310 indicate that the branch is expected to be taken. The lower two
311 bits must be zero. */
312 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_bitfield, /* complain_on_overflow */
319 ppc64_elf_brtaken_reloc, /* special_function */
320 "R_PPC64_ADDR14_BRTAKEN",/* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0x0000fffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is not expected to be taken. The lower
328 two bits must be zero. */
329 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_bitfield, /* complain_on_overflow */
336 ppc64_elf_brtaken_reloc, /* special_function */
337 "R_PPC64_ADDR14_BRNTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0000fffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* A relative 26 bit branch; the lower two bits must be zero. */
344 HOWTO (R_PPC64_REL24, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 26, /* bitsize */
348 TRUE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_signed, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_PPC64_REL24", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x03fffffc, /* dst_mask */
356 TRUE), /* pcrel_offset */
357
358 /* A relative 16 bit branch; the lower two bits must be zero. */
359 HOWTO (R_PPC64_REL14, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 TRUE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_signed, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_PPC64_REL14", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0x0000fffc, /* dst_mask */
371 TRUE), /* pcrel_offset */
372
373 /* A relative 16 bit branch. Bit 10 should be set to indicate that
374 the branch is expected to be taken. The lower two bits must be
375 zero. */
376 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_brtaken_reloc, /* special_function */
384 "R_PPC64_REL14_BRTAKEN", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x0000fffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is not expected to be taken. The lower two bits must
392 be zero. */
393 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 ppc64_elf_brtaken_reloc, /* special_function */
401 "R_PPC64_REL14_BRNTAKEN",/* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0x0000fffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
408 symbol. */
409 HOWTO (R_PPC64_GOT16, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc64_elf_unhandled_reloc, /* special_function */
417 "R_PPC64_GOT16", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC64_GOT16_LO, /* type */
426 0, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 ppc64_elf_unhandled_reloc, /* special_function */
433 "R_PPC64_GOT16_LO", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC64_GOT16_HI, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont,/* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16_HI", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_HA, /* type */
458 16, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont,/* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_HA", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC64_COPY, /* type */
477 0, /* rightshift */
478 0, /* this one is variable size */
479 0, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont, /* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC64_ADDR64, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC64_GLOB_DAT, /* type */
493 0, /* rightshift */
494 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
495 64, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 ppc64_elf_unhandled_reloc, /* special_function */
500 "R_PPC64_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 ONES (64), /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Created by the link editor. Marks a procedure linkage table
507 entry for a symbol. */
508 HOWTO (R_PPC64_JMP_SLOT, /* type */
509 0, /* rightshift */
510 0, /* size (0 = byte, 1 = short, 2 = long) */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_JMP_SLOT", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Used only by the dynamic linker. When the object is run, this
523 doubleword64 is set to the load address of the object, plus the
524 addend. */
525 HOWTO (R_PPC64_RELATIVE, /* type */
526 0, /* rightshift */
527 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
528 64, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_PPC64_RELATIVE", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 ONES (64), /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Like R_PPC64_ADDR32, but may be unaligned. */
540 HOWTO (R_PPC64_UADDR32, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_bitfield, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC64_UADDR32", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Like R_PPC64_ADDR16, but may be unaligned. */
555 HOWTO (R_PPC64_UADDR16, /* type */
556 0, /* rightshift */
557 1, /* size (0 = byte, 1 = short, 2 = long) */
558 16, /* bitsize */
559 FALSE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_bitfield, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC64_UADDR16", /* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 0xffff, /* dst_mask */
567 FALSE), /* pcrel_offset */
568
569 /* 32-bit PC relative. */
570 HOWTO (R_PPC64_REL32, /* type */
571 0, /* rightshift */
572 2, /* size (0 = byte, 1 = short, 2 = long) */
573 32, /* bitsize */
574 TRUE, /* pc_relative */
575 0, /* bitpos */
576 /* FIXME: Verify. Was complain_overflow_bitfield. */
577 complain_overflow_signed, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC64_REL32", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffffffff, /* dst_mask */
583 TRUE), /* pcrel_offset */
584
585 /* 32-bit relocation to the symbol's procedure linkage table. */
586 HOWTO (R_PPC64_PLT32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 ppc64_elf_unhandled_reloc, /* special_function */
594 "R_PPC64_PLT32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
601 FIXME: R_PPC64_PLTREL32 not supported. */
602 HOWTO (R_PPC64_PLTREL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_signed, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC64_PLTREL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
617 the symbol. */
618 HOWTO (R_PPC64_PLT16_LO, /* type */
619 0, /* rightshift */
620 1, /* size (0 = byte, 1 = short, 2 = long) */
621 16, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT16_LO", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC64_PLT16_HI, /* type */
635 16, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 ppc64_elf_unhandled_reloc, /* special_function */
642 "R_PPC64_PLT16_HI", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_HA, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_HA", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* 16-bit section relative relocation. */
665 HOWTO (R_PPC64_SECTOFF, /* type */
666 0, /* rightshift */
667 1, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_bitfield, /* complain_on_overflow */
672 ppc64_elf_sectoff_reloc, /* special_function */
673 "R_PPC64_SECTOFF", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0xffff, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679 /* Like R_PPC64_SECTOFF, but no overflow warning. */
680 HOWTO (R_PPC64_SECTOFF_LO, /* type */
681 0, /* rightshift */
682 1, /* size (0 = byte, 1 = short, 2 = long) */
683 16, /* bitsize */
684 FALSE, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_dont, /* complain_on_overflow */
687 ppc64_elf_sectoff_reloc, /* special_function */
688 "R_PPC64_SECTOFF_LO", /* name */
689 FALSE, /* partial_inplace */
690 0, /* src_mask */
691 0xffff, /* dst_mask */
692 FALSE), /* pcrel_offset */
693
694 /* 16-bit upper half section relative relocation. */
695 HOWTO (R_PPC64_SECTOFF_HI, /* type */
696 16, /* rightshift */
697 1, /* size (0 = byte, 1 = short, 2 = long) */
698 16, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_dont, /* complain_on_overflow */
702 ppc64_elf_sectoff_reloc, /* special_function */
703 "R_PPC64_SECTOFF_HI", /* name */
704 FALSE, /* partial_inplace */
705 0, /* src_mask */
706 0xffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
708
709 /* 16-bit upper half adjusted section relative relocation. */
710 HOWTO (R_PPC64_SECTOFF_HA, /* type */
711 16, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_dont, /* complain_on_overflow */
717 ppc64_elf_sectoff_ha_reloc, /* special_function */
718 "R_PPC64_SECTOFF_HA", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* Like R_PPC64_REL24 without touching the two least significant bits. */
725 HOWTO (R_PPC64_REL30, /* type */
726 2, /* rightshift */
727 2, /* size (0 = byte, 1 = short, 2 = long) */
728 30, /* bitsize */
729 TRUE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_dont, /* complain_on_overflow */
732 bfd_elf_generic_reloc, /* special_function */
733 "R_PPC64_REL30", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xfffffffc, /* dst_mask */
737 TRUE), /* pcrel_offset */
738
739 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
740
741 /* A standard 64-bit relocation. */
742 HOWTO (R_PPC64_ADDR64, /* type */
743 0, /* rightshift */
744 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
745 64, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 bfd_elf_generic_reloc, /* special_function */
750 "R_PPC64_ADDR64", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 ONES (64), /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* The bits 32-47 of an address. */
757 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
758 32, /* rightshift */
759 1, /* size (0 = byte, 1 = short, 2 = long) */
760 16, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_ADDR16_HIGHER", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xffff, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 /* The bits 32-47 of an address, plus 1 if the contents of the low
772 16 bits, treated as a signed number, is negative. */
773 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
774 32, /* rightshift */
775 1, /* size (0 = byte, 1 = short, 2 = long) */
776 16, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 ppc64_elf_ha_reloc, /* special_function */
781 "R_PPC64_ADDR16_HIGHERA", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0xffff, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* The bits 48-63 of an address. */
788 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
789 48, /* rightshift */
790 1, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC64_ADDR16_HIGHEST", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0xffff, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 /* The bits 48-63 of an address, plus 1 if the contents of the low
803 16 bits, treated as a signed number, is negative. */
804 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
805 48, /* rightshift */
806 1, /* size (0 = byte, 1 = short, 2 = long) */
807 16, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 ppc64_elf_ha_reloc, /* special_function */
812 "R_PPC64_ADDR16_HIGHESTA", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0xffff, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* Like ADDR64, but may be unaligned. */
819 HOWTO (R_PPC64_UADDR64, /* type */
820 0, /* rightshift */
821 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
822 64, /* bitsize */
823 FALSE, /* pc_relative */
824 0, /* bitpos */
825 complain_overflow_dont, /* complain_on_overflow */
826 bfd_elf_generic_reloc, /* special_function */
827 "R_PPC64_UADDR64", /* name */
828 FALSE, /* partial_inplace */
829 0, /* src_mask */
830 ONES (64), /* dst_mask */
831 FALSE), /* pcrel_offset */
832
833 /* 64-bit relative relocation. */
834 HOWTO (R_PPC64_REL64, /* type */
835 0, /* rightshift */
836 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
837 64, /* bitsize */
838 TRUE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 bfd_elf_generic_reloc, /* special_function */
842 "R_PPC64_REL64", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 ONES (64), /* dst_mask */
846 TRUE), /* pcrel_offset */
847
848 /* 64-bit relocation to the symbol's procedure linkage table. */
849 HOWTO (R_PPC64_PLT64, /* type */
850 0, /* rightshift */
851 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
852 64, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_dont, /* complain_on_overflow */
856 ppc64_elf_unhandled_reloc, /* special_function */
857 "R_PPC64_PLT64", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 ONES (64), /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* 64-bit PC relative relocation to the symbol's procedure linkage
864 table. */
865 /* FIXME: R_PPC64_PLTREL64 not supported. */
866 HOWTO (R_PPC64_PLTREL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 ppc64_elf_unhandled_reloc, /* special_function */
874 "R_PPC64_PLTREL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 16 bit TOC-relative relocation. */
881
882 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
883 HOWTO (R_PPC64_TOC16, /* type */
884 0, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_signed, /* complain_on_overflow */
890 ppc64_elf_toc_reloc, /* special_function */
891 "R_PPC64_TOC16", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* 16 bit TOC-relative relocation without overflow. */
898
899 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
900 HOWTO (R_PPC64_TOC16_LO, /* type */
901 0, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 ppc64_elf_toc_reloc, /* special_function */
908 "R_PPC64_TOC16_LO", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 0xffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 16 bit TOC-relative relocation, high 16 bits. */
915
916 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
917 HOWTO (R_PPC64_TOC16_HI, /* type */
918 16, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 ppc64_elf_toc_reloc, /* special_function */
925 "R_PPC64_TOC16_HI", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
932 contents of the low 16 bits, treated as a signed number, is
933 negative. */
934
935 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
936 HOWTO (R_PPC64_TOC16_HA, /* type */
937 16, /* rightshift */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont, /* complain_on_overflow */
943 ppc64_elf_toc_ha_reloc, /* special_function */
944 "R_PPC64_TOC16_HA", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0xffff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* 64-bit relocation; insert value of TOC base (.TOC.). */
951
952 /* R_PPC64_TOC 51 doubleword64 .TOC. */
953 HOWTO (R_PPC64_TOC, /* type */
954 0, /* rightshift */
955 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
956 64, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_bitfield, /* complain_on_overflow */
960 ppc64_elf_toc64_reloc, /* special_function */
961 "R_PPC64_TOC", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 ONES (64), /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* Like R_PPC64_GOT16, but also informs the link editor that the
968 value to relocate may (!) refer to a PLT entry which the link
969 editor (a) may replace with the symbol value. If the link editor
970 is unable to fully resolve the symbol, it may (b) create a PLT
971 entry and store the address to the new PLT entry in the GOT.
972 This permits lazy resolution of function symbols at run time.
973 The link editor may also skip all of this and just (c) emit a
974 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
975 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
976 HOWTO (R_PPC64_PLTGOT16, /* type */
977 0, /* rightshift */
978 1, /* size (0 = byte, 1 = short, 2 = long) */
979 16, /* bitsize */
980 FALSE, /* pc_relative */
981 0, /* bitpos */
982 complain_overflow_signed, /* complain_on_overflow */
983 ppc64_elf_unhandled_reloc, /* special_function */
984 "R_PPC64_PLTGOT16", /* name */
985 FALSE, /* partial_inplace */
986 0, /* src_mask */
987 0xffff, /* dst_mask */
988 FALSE), /* pcrel_offset */
989
990 /* Like R_PPC64_PLTGOT16, but without overflow. */
991 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
992 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
993 0, /* rightshift */
994 1, /* size (0 = byte, 1 = short, 2 = long) */
995 16, /* bitsize */
996 FALSE, /* pc_relative */
997 0, /* bitpos */
998 complain_overflow_dont, /* complain_on_overflow */
999 ppc64_elf_unhandled_reloc, /* special_function */
1000 "R_PPC64_PLTGOT16_LO", /* name */
1001 FALSE, /* partial_inplace */
1002 0, /* src_mask */
1003 0xffff, /* dst_mask */
1004 FALSE), /* pcrel_offset */
1005
1006 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1007 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1009 16, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_dont, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16_HI", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1023 1 if the contents of the low 16 bits, treated as a signed number,
1024 is negative. */
1025 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont,/* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HA", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1041 HOWTO (R_PPC64_ADDR16_DS, /* type */
1042 0, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_bitfield, /* complain_on_overflow */
1048 bfd_elf_generic_reloc, /* special_function */
1049 "R_PPC64_ADDR16_DS", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xfffc, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1056 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1057 0, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont,/* complain_on_overflow */
1063 bfd_elf_generic_reloc, /* special_function */
1064 "R_PPC64_ADDR16_LO_DS",/* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xfffc, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1071 HOWTO (R_PPC64_GOT16_DS, /* type */
1072 0, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_signed, /* complain_on_overflow */
1078 ppc64_elf_unhandled_reloc, /* special_function */
1079 "R_PPC64_GOT16_DS", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xfffc, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1086 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1087 0, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont, /* complain_on_overflow */
1093 ppc64_elf_unhandled_reloc, /* special_function */
1094 "R_PPC64_GOT16_LO_DS", /* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xfffc, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_dont, /* complain_on_overflow */
1108 ppc64_elf_unhandled_reloc, /* special_function */
1109 "R_PPC64_PLT16_LO_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_bitfield, /* complain_on_overflow */
1123 ppc64_elf_sectoff_reloc, /* special_function */
1124 "R_PPC64_SECTOFF_DS", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_dont, /* complain_on_overflow */
1138 ppc64_elf_sectoff_reloc, /* special_function */
1139 "R_PPC64_SECTOFF_LO_DS",/* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_TOC16_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_signed, /* complain_on_overflow */
1153 ppc64_elf_toc_reloc, /* special_function */
1154 "R_PPC64_TOC16_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_toc_reloc, /* special_function */
1169 "R_PPC64_TOC16_LO_DS", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1176 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1177 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc64_elf_unhandled_reloc, /* special_function */
1185 "R_PPC64_PLTGOT16_DS", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xfffc, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1192 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1193 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_unhandled_reloc, /* special_function */
1201 "R_PPC64_PLTGOT16_LO_DS",/* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Marker reloc for TLS. */
1208 HOWTO (R_PPC64_TLS,
1209 0, /* rightshift */
1210 2, /* size (0 = byte, 1 = short, 2 = long) */
1211 32, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_dont, /* complain_on_overflow */
1215 bfd_elf_generic_reloc, /* special_function */
1216 "R_PPC64_TLS", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* Computes the load module index of the load module that contains the
1223 definition of its TLS sym. */
1224 HOWTO (R_PPC64_DTPMOD64,
1225 0, /* rightshift */
1226 4, /* size (0 = byte, 1 = short, 2 = long) */
1227 64, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_dont, /* complain_on_overflow */
1231 ppc64_elf_unhandled_reloc, /* special_function */
1232 "R_PPC64_DTPMOD64", /* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 ONES (64), /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Computes a dtv-relative displacement, the difference between the value
1239 of sym+add and the base address of the thread-local storage block that
1240 contains the definition of sym, minus 0x8000. */
1241 HOWTO (R_PPC64_DTPREL64,
1242 0, /* rightshift */
1243 4, /* size (0 = byte, 1 = short, 2 = long) */
1244 64, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 ppc64_elf_unhandled_reloc, /* special_function */
1249 "R_PPC64_DTPREL64", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 ONES (64), /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 /* A 16 bit dtprel reloc. */
1256 HOWTO (R_PPC64_DTPREL16,
1257 0, /* rightshift */
1258 1, /* size (0 = byte, 1 = short, 2 = long) */
1259 16, /* bitsize */
1260 FALSE, /* pc_relative */
1261 0, /* bitpos */
1262 complain_overflow_signed, /* complain_on_overflow */
1263 ppc64_elf_unhandled_reloc, /* special_function */
1264 "R_PPC64_DTPREL16", /* name */
1265 FALSE, /* partial_inplace */
1266 0, /* src_mask */
1267 0xffff, /* dst_mask */
1268 FALSE), /* pcrel_offset */
1269
1270 /* Like DTPREL16, but no overflow. */
1271 HOWTO (R_PPC64_DTPREL16_LO,
1272 0, /* rightshift */
1273 1, /* size (0 = byte, 1 = short, 2 = long) */
1274 16, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 ppc64_elf_unhandled_reloc, /* special_function */
1279 "R_PPC64_DTPREL16_LO", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0xffff, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1286 HOWTO (R_PPC64_DTPREL16_HI,
1287 16, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_dont, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPREL16_HI", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1301 HOWTO (R_PPC64_DTPREL16_HA,
1302 16, /* rightshift */
1303 1, /* size (0 = byte, 1 = short, 2 = long) */
1304 16, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL16_HA", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 0xffff, /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1316 HOWTO (R_PPC64_DTPREL16_HIGHER,
1317 32, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_dont, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16_HIGHER", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1331 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1332 32, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_HIGHERA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1347 48, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HIGHEST", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1362 48, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16, but for insns with a DS field. */
1376 HOWTO (R_PPC64_DTPREL16_DS,
1377 0, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_signed, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_DS", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xfffc, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_DS, but no overflow. */
1391 HOWTO (R_PPC64_DTPREL16_LO_DS,
1392 0, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_LO_DS", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xfffc, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Computes a tp-relative displacement, the difference between the value of
1406 sym+add and the value of the thread pointer (r13). */
1407 HOWTO (R_PPC64_TPREL64,
1408 0, /* rightshift */
1409 4, /* size (0 = byte, 1 = short, 2 = long) */
1410 64, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_dont, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_TPREL64", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 ONES (64), /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* A 16 bit tprel reloc. */
1422 HOWTO (R_PPC64_TPREL16,
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_TPREL16", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Like TPREL16, but no overflow. */
1437 HOWTO (R_PPC64_TPREL16_LO,
1438 0, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 16, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_dont, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_TPREL16_LO", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xffff, /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* Like TPREL16_LO, but next higher group of 16 bits. */
1452 HOWTO (R_PPC64_TPREL16_HI,
1453 16, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_dont, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_TPREL16_HI", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Like TPREL16_HI, but adjust for low 16 bits. */
1467 HOWTO (R_PPC64_TPREL16_HA,
1468 16, /* rightshift */
1469 1, /* size (0 = byte, 1 = short, 2 = long) */
1470 16, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL16_HA", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0xffff, /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* Like TPREL16_HI, but next higher group of 16 bits. */
1482 HOWTO (R_PPC64_TPREL16_HIGHER,
1483 32, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16_HIGHER", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1497 HOWTO (R_PPC64_TPREL16_HIGHERA,
1498 32, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_HIGHERA", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HIGHEST,
1513 48, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HIGHEST", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1528 48, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HIGHESTA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16, but for insns with a DS field. */
1542 HOWTO (R_PPC64_TPREL16_DS,
1543 0, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_signed, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_DS", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xfffc, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_DS, but no overflow. */
1557 HOWTO (R_PPC64_TPREL16_LO_DS,
1558 0, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_LO_DS", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xfffc, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1572 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1573 to the first entry relative to the TOC base (r2). */
1574 HOWTO (R_PPC64_GOT_TLSGD16,
1575 0, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_GOT_TLSGD16", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like GOT_TLSGD16, but no overflow. */
1589 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1590 0, /* rightshift */
1591 1, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc64_elf_unhandled_reloc, /* special_function */
1597 "R_PPC64_GOT_TLSGD16_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1604 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1605 16, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_GOT_TLSGD16_HI", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xffff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1619 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1620 16, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_GOT_TLSGD16_HA", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xffff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1634 with values (sym+add)@dtpmod and zero, and computes the offset to the
1635 first entry relative to the TOC base (r2). */
1636 HOWTO (R_PPC64_GOT_TLSLD16,
1637 0, /* rightshift */
1638 1, /* size (0 = byte, 1 = short, 2 = long) */
1639 16, /* bitsize */
1640 FALSE, /* pc_relative */
1641 0, /* bitpos */
1642 complain_overflow_signed, /* complain_on_overflow */
1643 ppc64_elf_unhandled_reloc, /* special_function */
1644 "R_PPC64_GOT_TLSLD16", /* name */
1645 FALSE, /* partial_inplace */
1646 0, /* src_mask */
1647 0xffff, /* dst_mask */
1648 FALSE), /* pcrel_offset */
1649
1650 /* Like GOT_TLSLD16, but no overflow. */
1651 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1652 0, /* rightshift */
1653 1, /* size (0 = byte, 1 = short, 2 = long) */
1654 16, /* bitsize */
1655 FALSE, /* pc_relative */
1656 0, /* bitpos */
1657 complain_overflow_dont, /* complain_on_overflow */
1658 ppc64_elf_unhandled_reloc, /* special_function */
1659 "R_PPC64_GOT_TLSLD16_LO", /* name */
1660 FALSE, /* partial_inplace */
1661 0, /* src_mask */
1662 0xffff, /* dst_mask */
1663 FALSE), /* pcrel_offset */
1664
1665 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1666 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1667 16, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_dont, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSLD16_HI", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1681 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1682 16, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSLD16_HA", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1696 the offset to the entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_DTPREL16_DS", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xfffc, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_DTPREL16_DS, but no overflow. */
1712 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xfffc, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_dont, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_DTPREL16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_DTPREL16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1757 offset to the entry relative to the TOC base (r2). */
1758 HOWTO (R_PPC64_GOT_TPREL16_DS,
1759 0, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_signed, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_TPREL16_DS", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xfffc, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_TPREL16_DS, but no overflow. */
1773 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1774 0, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xfffc, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1788 HOWTO (R_PPC64_GOT_TPREL16_HI,
1789 16, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_dont, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_TPREL16_HI", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xffff, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1803 HOWTO (R_PPC64_GOT_TPREL16_HA,
1804 16, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_TPREL16_HA", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xffff, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* GNU extension to record C++ vtable hierarchy. */
1818 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1819 0, /* rightshift */
1820 0, /* size (0 = byte, 1 = short, 2 = long) */
1821 0, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_dont, /* complain_on_overflow */
1825 NULL, /* special_function */
1826 "R_PPC64_GNU_VTINHERIT", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* GNU extension to record C++ vtable member usage. */
1833 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1834 0, /* rightshift */
1835 0, /* size (0 = byte, 1 = short, 2 = long) */
1836 0, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 NULL, /* special_function */
1841 "R_PPC64_GNU_VTENTRY", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846 };
1847
1848 \f
1849 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1850 be done. */
1851
1852 static void
1853 ppc_howto_init (void)
1854 {
1855 unsigned int i, type;
1856
1857 for (i = 0;
1858 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1859 i++)
1860 {
1861 type = ppc64_elf_howto_raw[i].type;
1862 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1863 / sizeof (ppc64_elf_howto_table[0])));
1864 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1865 }
1866 }
1867
1868 static reloc_howto_type *
1869 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1870 bfd_reloc_code_real_type code)
1871 {
1872 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1873
1874 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1875 /* Initialize howto table if needed. */
1876 ppc_howto_init ();
1877
1878 switch (code)
1879 {
1880 default:
1881 return NULL;
1882
1883 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1884 break;
1885 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1886 break;
1887 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1888 break;
1889 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1890 break;
1891 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1892 break;
1893 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1894 break;
1895 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1896 break;
1897 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1898 break;
1899 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1900 break;
1901 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1902 break;
1903 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1904 break;
1905 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1906 break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1908 break;
1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1910 break;
1911 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1912 break;
1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1914 break;
1915 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1916 break;
1917 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1918 break;
1919 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1920 break;
1921 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1922 break;
1923 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1924 break;
1925 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1926 break;
1927 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1928 break;
1929 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1930 break;
1931 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1932 break;
1933 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1934 break;
1935 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1936 break;
1937 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1938 break;
1939 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1940 break;
1941 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1942 break;
1943 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1944 break;
1945 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1946 break;
1947 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1948 break;
1949 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1954 break;
1955 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1956 break;
1957 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1958 break;
1959 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1960 break;
1961 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1962 break;
1963 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1964 break;
1965 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1968 break;
1969 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1970 break;
1971 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1972 break;
1973 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1978 break;
1979 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1980 break;
1981 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1982 break;
1983 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1984 break;
1985 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1986 break;
1987 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1988 break;
1989 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1990 break;
1991 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1992 break;
1993 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1996 break;
1997 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2002 break;
2003 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2004 break;
2005 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2006 break;
2007 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2012 break;
2013 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2014 break;
2015 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2016 break;
2017 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2024 break;
2025 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2026 break;
2027 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2048 break;
2049 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2050 break;
2051 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2056 break;
2057 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2058 break;
2059 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2068 break;
2069 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2070 break;
2071 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2080 break;
2081 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2082 break;
2083 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2084 break;
2085 }
2086
2087 return ppc64_elf_howto_table[r];
2088 };
2089
2090 /* Set the howto pointer for a PowerPC ELF reloc. */
2091
2092 static void
2093 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2094 Elf_Internal_Rela *dst)
2095 {
2096 unsigned int type;
2097
2098 /* Initialize howto table if needed. */
2099 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2100 ppc_howto_init ();
2101
2102 type = ELF64_R_TYPE (dst->r_info);
2103 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2104 / sizeof (ppc64_elf_howto_table[0])));
2105 cache_ptr->howto = ppc64_elf_howto_table[type];
2106 }
2107
2108 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2109
2110 static bfd_reloc_status_type
2111 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2112 void *data, asection *input_section,
2113 bfd *output_bfd, char **error_message)
2114 {
2115 /* If this is a relocatable link (output_bfd test tells us), just
2116 call the generic function. Any adjustment will be done at final
2117 link time. */
2118 if (output_bfd != NULL)
2119 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2120 input_section, output_bfd, error_message);
2121
2122 /* Adjust the addend for sign extension of the low 16 bits.
2123 We won't actually be using the low 16 bits, so trashing them
2124 doesn't matter. */
2125 reloc_entry->addend += 0x8000;
2126 return bfd_reloc_continue;
2127 }
2128
2129 static bfd_reloc_status_type
2130 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2131 void *data, asection *input_section,
2132 bfd *output_bfd, char **error_message)
2133 {
2134 long insn;
2135 enum elf_ppc64_reloc_type r_type;
2136 bfd_size_type octets;
2137 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2138 bfd_boolean is_power4 = FALSE;
2139
2140 /* If this is a relocatable link (output_bfd test tells us), just
2141 call the generic function. Any adjustment will be done at final
2142 link time. */
2143 if (output_bfd != NULL)
2144 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2145 input_section, output_bfd, error_message);
2146
2147 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2148 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2149 insn &= ~(0x01 << 21);
2150 r_type = reloc_entry->howto->type;
2151 if (r_type == R_PPC64_ADDR14_BRTAKEN
2152 || r_type == R_PPC64_REL14_BRTAKEN)
2153 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2154
2155 if (is_power4)
2156 {
2157 /* Set 'a' bit. This is 0b00010 in BO field for branch
2158 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2159 for branch on CTR insns (BO == 1a00t or 1a01t). */
2160 if ((insn & (0x14 << 21)) == (0x04 << 21))
2161 insn |= 0x02 << 21;
2162 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2163 insn |= 0x08 << 21;
2164 else
2165 return bfd_reloc_continue;
2166 }
2167 else
2168 {
2169 bfd_vma target = 0;
2170 bfd_vma from;
2171
2172 if (!bfd_is_com_section (symbol->section))
2173 target = symbol->value;
2174 target += symbol->section->output_section->vma;
2175 target += symbol->section->output_offset;
2176 target += reloc_entry->addend;
2177
2178 from = (reloc_entry->address
2179 + input_section->output_offset
2180 + input_section->output_section->vma);
2181
2182 /* Invert 'y' bit if not the default. */
2183 if ((bfd_signed_vma) (target - from) < 0)
2184 insn ^= 0x01 << 21;
2185 }
2186 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2187 return bfd_reloc_continue;
2188 }
2189
2190 static bfd_reloc_status_type
2191 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2192 void *data, asection *input_section,
2193 bfd *output_bfd, char **error_message)
2194 {
2195 /* If this is a relocatable link (output_bfd test tells us), just
2196 call the generic function. Any adjustment will be done at final
2197 link time. */
2198 if (output_bfd != NULL)
2199 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2200 input_section, output_bfd, error_message);
2201
2202 /* Subtract the symbol section base address. */
2203 reloc_entry->addend -= symbol->section->output_section->vma;
2204 return bfd_reloc_continue;
2205 }
2206
2207 static bfd_reloc_status_type
2208 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2209 void *data, asection *input_section,
2210 bfd *output_bfd, char **error_message)
2211 {
2212 /* If this is a relocatable link (output_bfd test tells us), just
2213 call the generic function. Any adjustment will be done at final
2214 link time. */
2215 if (output_bfd != NULL)
2216 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2217 input_section, output_bfd, error_message);
2218
2219 /* Subtract the symbol section base address. */
2220 reloc_entry->addend -= symbol->section->output_section->vma;
2221
2222 /* Adjust the addend for sign extension of the low 16 bits. */
2223 reloc_entry->addend += 0x8000;
2224 return bfd_reloc_continue;
2225 }
2226
2227 static bfd_reloc_status_type
2228 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2229 void *data, asection *input_section,
2230 bfd *output_bfd, char **error_message)
2231 {
2232 bfd_vma TOCstart;
2233
2234 /* If this is a relocatable link (output_bfd test tells us), just
2235 call the generic function. Any adjustment will be done at final
2236 link time. */
2237 if (output_bfd != NULL)
2238 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2239 input_section, output_bfd, error_message);
2240
2241 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2242 if (TOCstart == 0)
2243 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2244
2245 /* Subtract the TOC base address. */
2246 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2247 return bfd_reloc_continue;
2248 }
2249
2250 static bfd_reloc_status_type
2251 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2252 void *data, asection *input_section,
2253 bfd *output_bfd, char **error_message)
2254 {
2255 bfd_vma TOCstart;
2256
2257 /* If this is a relocatable link (output_bfd test tells us), just
2258 call the generic function. Any adjustment will be done at final
2259 link time. */
2260 if (output_bfd != NULL)
2261 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2262 input_section, output_bfd, error_message);
2263
2264 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2265 if (TOCstart == 0)
2266 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2267
2268 /* Subtract the TOC base address. */
2269 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2270
2271 /* Adjust the addend for sign extension of the low 16 bits. */
2272 reloc_entry->addend += 0x8000;
2273 return bfd_reloc_continue;
2274 }
2275
2276 static bfd_reloc_status_type
2277 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2278 void *data, asection *input_section,
2279 bfd *output_bfd, char **error_message)
2280 {
2281 bfd_vma TOCstart;
2282 bfd_size_type octets;
2283
2284 /* If this is a relocatable link (output_bfd test tells us), just
2285 call the generic function. Any adjustment will be done at final
2286 link time. */
2287 if (output_bfd != NULL)
2288 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2289 input_section, output_bfd, error_message);
2290
2291 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2292 if (TOCstart == 0)
2293 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2294
2295 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2296 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2297 return bfd_reloc_ok;
2298 }
2299
2300 static bfd_reloc_status_type
2301 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2302 void *data, asection *input_section,
2303 bfd *output_bfd, char **error_message)
2304 {
2305 /* If this is a relocatable link (output_bfd test tells us), just
2306 call the generic function. Any adjustment will be done at final
2307 link time. */
2308 if (output_bfd != NULL)
2309 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2310 input_section, output_bfd, error_message);
2311
2312 if (error_message != NULL)
2313 {
2314 static char buf[60];
2315 sprintf (buf, "generic linker can't handle %s",
2316 reloc_entry->howto->name);
2317 *error_message = buf;
2318 }
2319 return bfd_reloc_dangerous;
2320 }
2321
2322 struct ppc64_elf_obj_tdata
2323 {
2324 struct elf_obj_tdata elf;
2325
2326 /* Shortcuts to dynamic linker sections. */
2327 asection *got;
2328 asection *relgot;
2329
2330 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2331 sections means we potentially need one of these for each input bfd. */
2332 union {
2333 bfd_signed_vma refcount;
2334 bfd_vma offset;
2335 } tlsld_got;
2336 };
2337
2338 #define ppc64_elf_tdata(bfd) \
2339 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2340
2341 #define ppc64_tlsld_got(bfd) \
2342 (&ppc64_elf_tdata (bfd)->tlsld_got)
2343
2344 /* Override the generic function because we store some extras. */
2345
2346 static bfd_boolean
2347 ppc64_elf_mkobject (bfd *abfd)
2348 {
2349 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2350 abfd->tdata.any = bfd_zalloc (abfd, amt);
2351 if (abfd->tdata.any == NULL)
2352 return FALSE;
2353 return TRUE;
2354 }
2355
2356 /* Fix bad default arch selected for a 64 bit input bfd when the
2357 default is 32 bit. */
2358
2359 static bfd_boolean
2360 ppc64_elf_object_p (bfd *abfd)
2361 {
2362 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2363 {
2364 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2365
2366 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2367 {
2368 /* Relies on arch after 32 bit default being 64 bit default. */
2369 abfd->arch_info = abfd->arch_info->next;
2370 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2371 }
2372 }
2373 return TRUE;
2374 }
2375
2376 /* Merge backend specific data from an object file to the output
2377 object file when linking. */
2378
2379 static bfd_boolean
2380 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2381 {
2382 /* Check if we have the same endianess. */
2383 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2384 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2385 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2386 {
2387 const char *msg;
2388
2389 if (bfd_big_endian (ibfd))
2390 msg = _("%s: compiled for a big endian system "
2391 "and target is little endian");
2392 else
2393 msg = _("%s: compiled for a little endian system "
2394 "and target is big endian");
2395
2396 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2397
2398 bfd_set_error (bfd_error_wrong_format);
2399 return FALSE;
2400 }
2401
2402 return TRUE;
2403 }
2404
2405 /* Add extra PPC sections. */
2406
2407 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2408 {
2409 { ".sdata", 0, NULL, 0,
2410 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2411 { ".sbss", 0, NULL, 0,
2412 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2413 { ".plt", 0, NULL, 0,
2414 SHT_NOBITS, 0 },
2415 { ".toc", 0, NULL, 0,
2416 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2417 { ".toc1", 0, NULL, 0,
2418 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2419 { ".tocbss", 0, NULL, 0,
2420 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2421 { NULL, 0, NULL, 0,
2422 0, 0 }
2423 };
2424
2425 struct _ppc64_elf_section_data
2426 {
2427 struct bfd_elf_section_data elf;
2428
2429 /* An array with one entry for each opd function descriptor. */
2430 union
2431 {
2432 /* Points to the function code section for local opd entries. */
2433 asection **func_sec;
2434 /* After editing .opd, adjust references to opd local syms. */
2435 long *adjust;
2436 } opd;
2437
2438 /* An array for toc sections, indexed by offset/8.
2439 Specifies the relocation symbol index used at a given toc offset. */
2440 unsigned *t_symndx;
2441 };
2442
2443 #define ppc64_elf_section_data(sec) \
2444 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2445
2446 static bfd_boolean
2447 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2448 {
2449 struct _ppc64_elf_section_data *sdata;
2450 bfd_size_type amt = sizeof (*sdata);
2451
2452 sdata = bfd_zalloc (abfd, amt);
2453 if (sdata == NULL)
2454 return FALSE;
2455 sec->used_by_bfd = sdata;
2456
2457 return _bfd_elf_new_section_hook (abfd, sec);
2458 }
2459 \f
2460 /* The following functions are specific to the ELF linker, while
2461 functions above are used generally. Those named ppc64_elf_* are
2462 called by the main ELF linker code. They appear in this file more
2463 or less in the order in which they are called. eg.
2464 ppc64_elf_check_relocs is called early in the link process,
2465 ppc64_elf_finish_dynamic_sections is one of the last functions
2466 called.
2467
2468 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2469 functions have both a function code symbol and a function descriptor
2470 symbol. A call to foo in a relocatable object file looks like:
2471
2472 . .text
2473 . x:
2474 . bl .foo
2475 . nop
2476
2477 The function definition in another object file might be:
2478
2479 . .section .opd
2480 . foo: .quad .foo
2481 . .quad .TOC.@tocbase
2482 . .quad 0
2483 .
2484 . .text
2485 . .foo: blr
2486
2487 When the linker resolves the call during a static link, the branch
2488 unsurprisingly just goes to .foo and the .opd information is unused.
2489 If the function definition is in a shared library, things are a little
2490 different: The call goes via a plt call stub, the opd information gets
2491 copied to the plt, and the linker patches the nop.
2492
2493 . x:
2494 . bl .foo_stub
2495 . ld 2,40(1)
2496 .
2497 .
2498 . .foo_stub:
2499 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2500 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2501 . std 2,40(1) # this is the general idea
2502 . ld 11,0(12)
2503 . ld 2,8(12)
2504 . mtctr 11
2505 . ld 11,16(12)
2506 . bctr
2507 .
2508 . .section .plt
2509 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2510
2511 The "reloc ()" notation is supposed to indicate that the linker emits
2512 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2513 copying.
2514
2515 What are the difficulties here? Well, firstly, the relocations
2516 examined by the linker in check_relocs are against the function code
2517 sym .foo, while the dynamic relocation in the plt is emitted against
2518 the function descriptor symbol, foo. Somewhere along the line, we need
2519 to carefully copy dynamic link information from one symbol to the other.
2520 Secondly, the generic part of the elf linker will make .foo a dynamic
2521 symbol as is normal for most other backends. We need foo dynamic
2522 instead, at least for an application final link. However, when
2523 creating a shared library containing foo, we need to have both symbols
2524 dynamic so that references to .foo are satisfied during the early
2525 stages of linking. Otherwise the linker might decide to pull in a
2526 definition from some other object, eg. a static library. */
2527
2528 /* The linker needs to keep track of the number of relocs that it
2529 decides to copy as dynamic relocs in check_relocs for each symbol.
2530 This is so that it can later discard them if they are found to be
2531 unnecessary. We store the information in a field extending the
2532 regular ELF linker hash table. */
2533
2534 struct ppc_dyn_relocs
2535 {
2536 struct ppc_dyn_relocs *next;
2537
2538 /* The input section of the reloc. */
2539 asection *sec;
2540
2541 /* Total number of relocs copied for the input section. */
2542 bfd_size_type count;
2543
2544 /* Number of pc-relative relocs copied for the input section. */
2545 bfd_size_type pc_count;
2546 };
2547
2548 /* Track GOT entries needed for a given symbol. We might need more
2549 than one got entry per symbol. */
2550 struct got_entry
2551 {
2552 struct got_entry *next;
2553
2554 /* The symbol addend that we'll be placing in the GOT. */
2555 bfd_vma addend;
2556
2557 /* Unlike other ELF targets, we use separate GOT entries for the same
2558 symbol referenced from different input files. This is to support
2559 automatic multiple TOC/GOT sections, where the TOC base can vary
2560 from one input file to another.
2561
2562 Point to the BFD owning this GOT entry. */
2563 bfd *owner;
2564
2565 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2566 TLS_TPREL or TLS_DTPREL for tls entries. */
2567 char tls_type;
2568
2569 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2570 union
2571 {
2572 bfd_signed_vma refcount;
2573 bfd_vma offset;
2574 } got;
2575 };
2576
2577 /* The same for PLT. */
2578 struct plt_entry
2579 {
2580 struct plt_entry *next;
2581
2582 bfd_vma addend;
2583
2584 union
2585 {
2586 bfd_signed_vma refcount;
2587 bfd_vma offset;
2588 } plt;
2589 };
2590
2591 /* Of those relocs that might be copied as dynamic relocs, this macro
2592 selects those that must be copied when linking a shared library,
2593 even when the symbol is local. */
2594
2595 #define MUST_BE_DYN_RELOC(RTYPE) \
2596 ((RTYPE) != R_PPC64_REL32 \
2597 && (RTYPE) != R_PPC64_REL64 \
2598 && (RTYPE) != R_PPC64_REL30)
2599
2600 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2601 copying dynamic variables from a shared lib into an app's dynbss
2602 section, and instead use a dynamic relocation to point into the
2603 shared lib. With code that gcc generates, it's vital that this be
2604 enabled; In the PowerPC64 ABI, the address of a function is actually
2605 the address of a function descriptor, which resides in the .opd
2606 section. gcc uses the descriptor directly rather than going via the
2607 GOT as some other ABI's do, which means that initialized function
2608 pointers must reference the descriptor. Thus, a function pointer
2609 initialized to the address of a function in a shared library will
2610 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2611 redefines the function desctriptor symbol to point to the copy. This
2612 presents a problem as a plt entry for that function is also
2613 initialized from the function descriptor symbol and the copy reloc
2614 may not be initialized first. */
2615 #define ELIMINATE_COPY_RELOCS 1
2616
2617 /* Section name for stubs is the associated section name plus this
2618 string. */
2619 #define STUB_SUFFIX ".stub"
2620
2621 /* Linker stubs.
2622 ppc_stub_long_branch:
2623 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2624 destination, but a 24 bit branch in a stub section will reach.
2625 . b dest
2626
2627 ppc_stub_plt_branch:
2628 Similar to the above, but a 24 bit branch in the stub section won't
2629 reach its destination.
2630 . addis %r12,%r2,xxx@toc@ha
2631 . ld %r11,xxx@toc@l(%r12)
2632 . mtctr %r11
2633 . bctr
2634
2635 ppc_stub_plt_call:
2636 Used to call a function in a shared library.
2637 . addis %r12,%r2,xxx@toc@ha
2638 . std %r2,40(%r1)
2639 . ld %r11,xxx+0@toc@l(%r12)
2640 . ld %r2,xxx+8@toc@l(%r12)
2641 . mtctr %r11
2642 . ld %r11,xxx+16@toc@l(%r12)
2643 . bctr
2644
2645 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2646 code to adjust the value and save r2 to support multiple toc sections.
2647 A ppc_stub_long_branch with an r2 offset looks like:
2648 . std %r2,40(%r1)
2649 . addis %r2,%r2,off@ha
2650 . addi %r2,%r2,off@l
2651 . b dest
2652
2653 A ppc_stub_plt_branch with an r2 offset looks like:
2654 . std %r2,40(%r1)
2655 . addis %r12,%r2,xxx@toc@ha
2656 . ld %r11,xxx@toc@l(%r12)
2657 . addis %r2,%r2,off@ha
2658 . addi %r2,%r2,off@l
2659 . mtctr %r11
2660 . bctr
2661 */
2662
2663 enum ppc_stub_type {
2664 ppc_stub_none,
2665 ppc_stub_long_branch,
2666 ppc_stub_long_branch_r2off,
2667 ppc_stub_plt_branch,
2668 ppc_stub_plt_branch_r2off,
2669 ppc_stub_plt_call
2670 };
2671
2672 struct ppc_stub_hash_entry {
2673
2674 /* Base hash table entry structure. */
2675 struct bfd_hash_entry root;
2676
2677 enum ppc_stub_type stub_type;
2678
2679 /* The stub section. */
2680 asection *stub_sec;
2681
2682 /* Offset within stub_sec of the beginning of this stub. */
2683 bfd_vma stub_offset;
2684
2685 /* Given the symbol's value and its section we can determine its final
2686 value when building the stubs (so the stub knows where to jump. */
2687 bfd_vma target_value;
2688 asection *target_section;
2689
2690 /* The symbol table entry, if any, that this was derived from. */
2691 struct ppc_link_hash_entry *h;
2692
2693 /* And the reloc addend that this was derived from. */
2694 bfd_vma addend;
2695
2696 /* Where this stub is being called from, or, in the case of combined
2697 stub sections, the first input section in the group. */
2698 asection *id_sec;
2699 };
2700
2701 struct ppc_branch_hash_entry {
2702
2703 /* Base hash table entry structure. */
2704 struct bfd_hash_entry root;
2705
2706 /* Offset within .branch_lt. */
2707 unsigned int offset;
2708
2709 /* Generation marker. */
2710 unsigned int iter;
2711 };
2712
2713 struct ppc_link_hash_entry
2714 {
2715 struct elf_link_hash_entry elf;
2716
2717 /* A pointer to the most recently used stub hash entry against this
2718 symbol. */
2719 struct ppc_stub_hash_entry *stub_cache;
2720
2721 /* Track dynamic relocs copied for this symbol. */
2722 struct ppc_dyn_relocs *dyn_relocs;
2723
2724 /* Link between function code and descriptor symbols. */
2725 struct elf_link_hash_entry *oh;
2726
2727 /* Flag function code and descriptor symbols. */
2728 unsigned int is_func:1;
2729 unsigned int is_func_descriptor:1;
2730 unsigned int is_entry:1;
2731
2732 /* Contexts in which symbol is used in the GOT (or TOC).
2733 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2734 corresponding relocs are encountered during check_relocs.
2735 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2736 indicate the corresponding GOT entry type is not needed.
2737 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2738 a TPREL one. We use a separate flag rather than setting TPREL
2739 just for convenience in distinguishing the two cases. */
2740 #define TLS_GD 1 /* GD reloc. */
2741 #define TLS_LD 2 /* LD reloc. */
2742 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2743 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2744 #define TLS_TLS 16 /* Any TLS reloc. */
2745 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2746 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2747 char tls_mask;
2748 };
2749
2750 /* ppc64 ELF linker hash table. */
2751
2752 struct ppc_link_hash_table
2753 {
2754 struct elf_link_hash_table elf;
2755
2756 /* The stub hash table. */
2757 struct bfd_hash_table stub_hash_table;
2758
2759 /* Another hash table for plt_branch stubs. */
2760 struct bfd_hash_table branch_hash_table;
2761
2762 /* Linker stub bfd. */
2763 bfd *stub_bfd;
2764
2765 /* Linker call-backs. */
2766 asection * (*add_stub_section) (const char *, asection *);
2767 void (*layout_sections_again) (void);
2768
2769 /* Array to keep track of which stub sections have been created, and
2770 information on stub grouping. */
2771 struct map_stub {
2772 /* This is the section to which stubs in the group will be attached. */
2773 asection *link_sec;
2774 /* The stub section. */
2775 asection *stub_sec;
2776 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2777 bfd_vma toc_off;
2778 } *stub_group;
2779
2780 /* Support for multiple toc sections. */
2781 unsigned int no_multi_toc;
2782 unsigned int multi_toc_needed;
2783
2784 /* Temp used when calculating TOC pointers. */
2785 bfd_vma toc_curr;
2786
2787 /* Highest input section id. */
2788 int top_id;
2789
2790 /* Highest output section index. */
2791 int top_index;
2792
2793 /* List of input sections for each output section. */
2794 asection **input_list;
2795
2796 /* Short-cuts to get to dynamic linker sections. */
2797 asection *got;
2798 asection *plt;
2799 asection *relplt;
2800 asection *dynbss;
2801 asection *relbss;
2802 asection *glink;
2803 asection *sfpr;
2804 asection *brlt;
2805 asection *relbrlt;
2806
2807 /* Short-cut to first output tls section. */
2808 asection *tls_sec;
2809
2810 /* Shortcut to .__tls_get_addr. */
2811 struct elf_link_hash_entry *tls_get_addr;
2812
2813 /* Statistics. */
2814 unsigned long stub_count[ppc_stub_plt_call];
2815
2816 /* Set if we should emit symbols for stubs. */
2817 unsigned int emit_stub_syms;
2818
2819 /* Set on error. */
2820 unsigned int stub_error;
2821
2822 /* Flag set when small branches are detected. Used to
2823 select suitable defaults for the stub group size. */
2824 unsigned int has_14bit_branch;
2825
2826 /* Set if we detect a reference undefined weak symbol. */
2827 unsigned int have_undefweak;
2828
2829 /* Incremented every time we size stubs. */
2830 unsigned int stub_iteration;
2831
2832 /* Small local sym to section mapping cache. */
2833 struct sym_sec_cache sym_sec;
2834 };
2835
2836 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2837
2838 #define ppc_hash_table(p) \
2839 ((struct ppc_link_hash_table *) ((p)->hash))
2840
2841 #define ppc_stub_hash_lookup(table, string, create, copy) \
2842 ((struct ppc_stub_hash_entry *) \
2843 bfd_hash_lookup ((table), (string), (create), (copy)))
2844
2845 #define ppc_branch_hash_lookup(table, string, create, copy) \
2846 ((struct ppc_branch_hash_entry *) \
2847 bfd_hash_lookup ((table), (string), (create), (copy)))
2848
2849 /* Create an entry in the stub hash table. */
2850
2851 static struct bfd_hash_entry *
2852 stub_hash_newfunc (struct bfd_hash_entry *entry,
2853 struct bfd_hash_table *table,
2854 const char *string)
2855 {
2856 /* Allocate the structure if it has not already been allocated by a
2857 subclass. */
2858 if (entry == NULL)
2859 {
2860 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2861 if (entry == NULL)
2862 return entry;
2863 }
2864
2865 /* Call the allocation method of the superclass. */
2866 entry = bfd_hash_newfunc (entry, table, string);
2867 if (entry != NULL)
2868 {
2869 struct ppc_stub_hash_entry *eh;
2870
2871 /* Initialize the local fields. */
2872 eh = (struct ppc_stub_hash_entry *) entry;
2873 eh->stub_type = ppc_stub_none;
2874 eh->stub_sec = NULL;
2875 eh->stub_offset = 0;
2876 eh->target_value = 0;
2877 eh->target_section = NULL;
2878 eh->h = NULL;
2879 eh->id_sec = NULL;
2880 }
2881
2882 return entry;
2883 }
2884
2885 /* Create an entry in the branch hash table. */
2886
2887 static struct bfd_hash_entry *
2888 branch_hash_newfunc (struct bfd_hash_entry *entry,
2889 struct bfd_hash_table *table,
2890 const char *string)
2891 {
2892 /* Allocate the structure if it has not already been allocated by a
2893 subclass. */
2894 if (entry == NULL)
2895 {
2896 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2897 if (entry == NULL)
2898 return entry;
2899 }
2900
2901 /* Call the allocation method of the superclass. */
2902 entry = bfd_hash_newfunc (entry, table, string);
2903 if (entry != NULL)
2904 {
2905 struct ppc_branch_hash_entry *eh;
2906
2907 /* Initialize the local fields. */
2908 eh = (struct ppc_branch_hash_entry *) entry;
2909 eh->offset = 0;
2910 eh->iter = 0;
2911 }
2912
2913 return entry;
2914 }
2915
2916 /* Create an entry in a ppc64 ELF linker hash table. */
2917
2918 static struct bfd_hash_entry *
2919 link_hash_newfunc (struct bfd_hash_entry *entry,
2920 struct bfd_hash_table *table,
2921 const char *string)
2922 {
2923 /* Allocate the structure if it has not already been allocated by a
2924 subclass. */
2925 if (entry == NULL)
2926 {
2927 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2928 if (entry == NULL)
2929 return entry;
2930 }
2931
2932 /* Call the allocation method of the superclass. */
2933 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2934 if (entry != NULL)
2935 {
2936 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2937
2938 eh->stub_cache = NULL;
2939 eh->dyn_relocs = NULL;
2940 eh->oh = NULL;
2941 eh->is_func = 0;
2942 eh->is_func_descriptor = 0;
2943 eh->is_entry = 0;
2944 eh->tls_mask = 0;
2945 }
2946
2947 return entry;
2948 }
2949
2950 /* Create a ppc64 ELF linker hash table. */
2951
2952 static struct bfd_link_hash_table *
2953 ppc64_elf_link_hash_table_create (bfd *abfd)
2954 {
2955 struct ppc_link_hash_table *htab;
2956 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2957
2958 htab = bfd_zmalloc (amt);
2959 if (htab == NULL)
2960 return NULL;
2961
2962 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2963 {
2964 free (htab);
2965 return NULL;
2966 }
2967
2968 /* Init the stub hash table too. */
2969 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2970 return NULL;
2971
2972 /* And the branch hash table. */
2973 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2974 return NULL;
2975
2976 /* Initializing two fields of the union is just cosmetic. We really
2977 only care about glist, but when compiled on a 32-bit host the
2978 bfd_vma fields are larger. Setting the bfd_vma to zero makes
2979 debugger inspection of these fields look nicer. */
2980 htab->elf.init_refcount.refcount = 0;
2981 htab->elf.init_refcount.glist = NULL;
2982 htab->elf.init_offset.offset = 0;
2983 htab->elf.init_offset.glist = NULL;
2984
2985 return &htab->elf.root;
2986 }
2987
2988 /* Free the derived linker hash table. */
2989
2990 static void
2991 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
2992 {
2993 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2994
2995 bfd_hash_table_free (&ret->stub_hash_table);
2996 bfd_hash_table_free (&ret->branch_hash_table);
2997 _bfd_generic_link_hash_table_free (hash);
2998 }
2999
3000 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3001
3002 void
3003 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3004 {
3005 struct ppc_link_hash_table *htab;
3006
3007 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3008
3009 /* Always hook our dynamic sections into the first bfd, which is the
3010 linker created stub bfd. This ensures that the GOT header is at
3011 the start of the output TOC section. */
3012 htab = ppc_hash_table (info);
3013 htab->stub_bfd = abfd;
3014 htab->elf.dynobj = abfd;
3015 }
3016
3017 /* Build a name for an entry in the stub hash table. */
3018
3019 static char *
3020 ppc_stub_name (const asection *input_section,
3021 const asection *sym_sec,
3022 const struct ppc_link_hash_entry *h,
3023 const Elf_Internal_Rela *rel)
3024 {
3025 char *stub_name;
3026 bfd_size_type len;
3027
3028 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3029 offsets from a sym as a branch target? In fact, we could
3030 probably assume the addend is always zero. */
3031 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3032
3033 if (h)
3034 {
3035 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3036 stub_name = bfd_malloc (len);
3037 if (stub_name != NULL)
3038 {
3039 sprintf (stub_name, "%08x.%s+%x",
3040 input_section->id & 0xffffffff,
3041 h->elf.root.root.string,
3042 (int) rel->r_addend & 0xffffffff);
3043 }
3044 }
3045 else
3046 {
3047 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3048 stub_name = bfd_malloc (len);
3049 if (stub_name != NULL)
3050 {
3051 sprintf (stub_name, "%08x.%x:%x+%x",
3052 input_section->id & 0xffffffff,
3053 sym_sec->id & 0xffffffff,
3054 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3055 (int) rel->r_addend & 0xffffffff);
3056 }
3057 }
3058 return stub_name;
3059 }
3060
3061 /* Look up an entry in the stub hash. Stub entries are cached because
3062 creating the stub name takes a bit of time. */
3063
3064 static struct ppc_stub_hash_entry *
3065 ppc_get_stub_entry (const asection *input_section,
3066 const asection *sym_sec,
3067 struct elf_link_hash_entry *hash,
3068 const Elf_Internal_Rela *rel,
3069 struct ppc_link_hash_table *htab)
3070 {
3071 struct ppc_stub_hash_entry *stub_entry;
3072 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3073 const asection *id_sec;
3074
3075 /* If this input section is part of a group of sections sharing one
3076 stub section, then use the id of the first section in the group.
3077 Stub names need to include a section id, as there may well be
3078 more than one stub used to reach say, printf, and we need to
3079 distinguish between them. */
3080 id_sec = htab->stub_group[input_section->id].link_sec;
3081
3082 if (h != NULL && h->stub_cache != NULL
3083 && h->stub_cache->h == h
3084 && h->stub_cache->id_sec == id_sec)
3085 {
3086 stub_entry = h->stub_cache;
3087 }
3088 else
3089 {
3090 char *stub_name;
3091
3092 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3093 if (stub_name == NULL)
3094 return NULL;
3095
3096 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3097 stub_name, FALSE, FALSE);
3098 if (h != NULL)
3099 h->stub_cache = stub_entry;
3100
3101 free (stub_name);
3102 }
3103
3104 return stub_entry;
3105 }
3106
3107 /* Add a new stub entry to the stub hash. Not all fields of the new
3108 stub entry are initialised. */
3109
3110 static struct ppc_stub_hash_entry *
3111 ppc_add_stub (const char *stub_name,
3112 asection *section,
3113 struct ppc_link_hash_table *htab)
3114 {
3115 asection *link_sec;
3116 asection *stub_sec;
3117 struct ppc_stub_hash_entry *stub_entry;
3118
3119 link_sec = htab->stub_group[section->id].link_sec;
3120 stub_sec = htab->stub_group[section->id].stub_sec;
3121 if (stub_sec == NULL)
3122 {
3123 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3124 if (stub_sec == NULL)
3125 {
3126 size_t namelen;
3127 bfd_size_type len;
3128 char *s_name;
3129
3130 namelen = strlen (link_sec->name);
3131 len = namelen + sizeof (STUB_SUFFIX);
3132 s_name = bfd_alloc (htab->stub_bfd, len);
3133 if (s_name == NULL)
3134 return NULL;
3135
3136 memcpy (s_name, link_sec->name, namelen);
3137 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3138 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3139 if (stub_sec == NULL)
3140 return NULL;
3141 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3142 }
3143 htab->stub_group[section->id].stub_sec = stub_sec;
3144 }
3145
3146 /* Enter this entry into the linker stub hash table. */
3147 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3148 TRUE, FALSE);
3149 if (stub_entry == NULL)
3150 {
3151 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3152 bfd_archive_filename (section->owner),
3153 stub_name);
3154 return NULL;
3155 }
3156
3157 stub_entry->stub_sec = stub_sec;
3158 stub_entry->stub_offset = 0;
3159 stub_entry->id_sec = link_sec;
3160 return stub_entry;
3161 }
3162
3163 /* Create sections for linker generated code. */
3164
3165 static bfd_boolean
3166 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3167 {
3168 struct ppc_link_hash_table *htab;
3169 flagword flags;
3170
3171 htab = ppc_hash_table (info);
3172
3173 /* Create .sfpr for code to save and restore fp regs. */
3174 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3175 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3176 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3177 if (htab->sfpr == NULL
3178 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3179 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3180 return FALSE;
3181
3182 /* Create .glink for lazy dynamic linking support. */
3183 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3184 if (htab->glink == NULL
3185 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3186 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3187 return FALSE;
3188
3189 /* Create .branch_lt for plt_branch stubs. */
3190 flags = (SEC_ALLOC | SEC_LOAD
3191 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3192 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3193 if (htab->brlt == NULL
3194 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3195 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3196 return FALSE;
3197
3198 if (info->shared)
3199 {
3200 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3201 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3202 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3203 if (!htab->relbrlt
3204 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3205 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3206 return FALSE;
3207 }
3208 return TRUE;
3209 }
3210
3211 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3212 not already done. */
3213
3214 static bfd_boolean
3215 create_got_section (bfd *abfd, struct bfd_link_info *info)
3216 {
3217 asection *got, *relgot;
3218 flagword flags;
3219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3220
3221 if (!htab->got)
3222 {
3223 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3224 return FALSE;
3225
3226 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3227 if (!htab->got)
3228 abort ();
3229 }
3230
3231 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3232 | SEC_LINKER_CREATED);
3233
3234 got = bfd_make_section (abfd, ".got");
3235 if (!got
3236 || !bfd_set_section_flags (abfd, got, flags)
3237 || !bfd_set_section_alignment (abfd, got, 3))
3238 return FALSE;
3239
3240 relgot = bfd_make_section (abfd, ".rela.got");
3241 if (!relgot
3242 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3243 || ! bfd_set_section_alignment (abfd, relgot, 3))
3244 return FALSE;
3245
3246 ppc64_elf_tdata (abfd)->got = got;
3247 ppc64_elf_tdata (abfd)->relgot = relgot;
3248 return TRUE;
3249 }
3250
3251 /* Create the dynamic sections, and set up shortcuts. */
3252
3253 static bfd_boolean
3254 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3255 {
3256 struct ppc_link_hash_table *htab;
3257
3258 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3259 return FALSE;
3260
3261 htab = ppc_hash_table (info);
3262 if (!htab->got)
3263 htab->got = bfd_get_section_by_name (dynobj, ".got");
3264 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3265 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3266 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3267 if (!info->shared)
3268 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3269
3270 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3271 || (!info->shared && !htab->relbss))
3272 abort ();
3273
3274 return TRUE;
3275 }
3276
3277 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3278
3279 static void
3280 ppc64_elf_copy_indirect_symbol
3281 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3282 struct elf_link_hash_entry *dir,
3283 struct elf_link_hash_entry *ind)
3284 {
3285 struct ppc_link_hash_entry *edir, *eind;
3286 flagword mask;
3287
3288 edir = (struct ppc_link_hash_entry *) dir;
3289 eind = (struct ppc_link_hash_entry *) ind;
3290
3291 /* Copy over any dynamic relocs we may have on the indirect sym. */
3292 if (eind->dyn_relocs != NULL)
3293 {
3294 if (edir->dyn_relocs != NULL)
3295 {
3296 struct ppc_dyn_relocs **pp;
3297 struct ppc_dyn_relocs *p;
3298
3299 if (eind->elf.root.type == bfd_link_hash_indirect)
3300 abort ();
3301
3302 /* Add reloc counts against the weak sym to the strong sym
3303 list. Merge any entries against the same section. */
3304 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3305 {
3306 struct ppc_dyn_relocs *q;
3307
3308 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3309 if (q->sec == p->sec)
3310 {
3311 q->pc_count += p->pc_count;
3312 q->count += p->count;
3313 *pp = p->next;
3314 break;
3315 }
3316 if (q == NULL)
3317 pp = &p->next;
3318 }
3319 *pp = edir->dyn_relocs;
3320 }
3321
3322 edir->dyn_relocs = eind->dyn_relocs;
3323 eind->dyn_relocs = NULL;
3324 }
3325
3326 edir->is_func |= eind->is_func;
3327 edir->is_func_descriptor |= eind->is_func_descriptor;
3328 edir->is_entry |= eind->is_entry;
3329 edir->tls_mask |= eind->tls_mask;
3330
3331 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3332 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
3333 /* If called to transfer flags for a weakdef during processing
3334 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3335 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3336 if (ELIMINATE_COPY_RELOCS
3337 && eind->elf.root.type != bfd_link_hash_indirect
3338 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3339 mask &= ~ELF_LINK_NON_GOT_REF;
3340
3341 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3342
3343 /* If we were called to copy over info for a weak sym, that's all. */
3344 if (eind->elf.root.type != bfd_link_hash_indirect)
3345 return;
3346
3347 /* Copy over got entries that we may have already seen to the
3348 symbol which just became indirect. */
3349 if (eind->elf.got.glist != NULL)
3350 {
3351 if (edir->elf.got.glist != NULL)
3352 {
3353 struct got_entry **entp;
3354 struct got_entry *ent;
3355
3356 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3357 {
3358 struct got_entry *dent;
3359
3360 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3361 if (dent->addend == ent->addend
3362 && dent->owner == ent->owner
3363 && dent->tls_type == ent->tls_type)
3364 {
3365 dent->got.refcount += ent->got.refcount;
3366 *entp = ent->next;
3367 break;
3368 }
3369 if (dent == NULL)
3370 entp = &ent->next;
3371 }
3372 *entp = edir->elf.got.glist;
3373 }
3374
3375 edir->elf.got.glist = eind->elf.got.glist;
3376 eind->elf.got.glist = NULL;
3377 }
3378
3379 /* And plt entries. */
3380 if (eind->elf.plt.plist != NULL)
3381 {
3382 if (edir->elf.plt.plist != NULL)
3383 {
3384 struct plt_entry **entp;
3385 struct plt_entry *ent;
3386
3387 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3388 {
3389 struct plt_entry *dent;
3390
3391 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3392 if (dent->addend == ent->addend)
3393 {
3394 dent->plt.refcount += ent->plt.refcount;
3395 *entp = ent->next;
3396 break;
3397 }
3398 if (dent == NULL)
3399 entp = &ent->next;
3400 }
3401 *entp = edir->elf.plt.plist;
3402 }
3403
3404 edir->elf.plt.plist = eind->elf.plt.plist;
3405 eind->elf.plt.plist = NULL;
3406 }
3407
3408 if (edir->elf.dynindx == -1)
3409 {
3410 edir->elf.dynindx = eind->elf.dynindx;
3411 edir->elf.dynstr_index = eind->elf.dynstr_index;
3412 eind->elf.dynindx = -1;
3413 eind->elf.dynstr_index = 0;
3414 }
3415 else
3416 BFD_ASSERT (eind->elf.dynindx == -1);
3417 }
3418
3419 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3420 symbols undefined on the command-line. */
3421
3422 bfd_boolean
3423 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3424 {
3425 struct ppc_link_hash_table *htab;
3426 struct bfd_sym_chain *sym;
3427
3428 htab = ppc_hash_table (info);
3429 for (sym = info->gc_sym_list; sym; sym = sym->next)
3430 {
3431 struct elf_link_hash_entry *h;
3432
3433 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3434 if (h != NULL)
3435 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3436 }
3437 return TRUE;
3438 }
3439
3440 static bfd_boolean
3441 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3442 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3443 {
3444 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3445 char *local_got_tls_masks;
3446
3447 if (local_got_ents == NULL)
3448 {
3449 bfd_size_type size = symtab_hdr->sh_info;
3450
3451 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3452 local_got_ents = bfd_zalloc (abfd, size);
3453 if (local_got_ents == NULL)
3454 return FALSE;
3455 elf_local_got_ents (abfd) = local_got_ents;
3456 }
3457
3458 if ((tls_type & TLS_EXPLICIT) == 0)
3459 {
3460 struct got_entry *ent;
3461
3462 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3463 if (ent->addend == r_addend
3464 && ent->owner == abfd
3465 && ent->tls_type == tls_type)
3466 break;
3467 if (ent == NULL)
3468 {
3469 bfd_size_type amt = sizeof (*ent);
3470 ent = bfd_alloc (abfd, amt);
3471 if (ent == NULL)
3472 return FALSE;
3473 ent->next = local_got_ents[r_symndx];
3474 ent->addend = r_addend;
3475 ent->owner = abfd;
3476 ent->tls_type = tls_type;
3477 ent->got.refcount = 0;
3478 local_got_ents[r_symndx] = ent;
3479 }
3480 ent->got.refcount += 1;
3481 }
3482
3483 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3484 local_got_tls_masks[r_symndx] |= tls_type;
3485 return TRUE;
3486 }
3487
3488 static bfd_boolean
3489 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3490 {
3491 struct plt_entry *ent;
3492
3493 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3494 if (ent->addend == addend)
3495 break;
3496 if (ent == NULL)
3497 {
3498 bfd_size_type amt = sizeof (*ent);
3499 ent = bfd_alloc (abfd, amt);
3500 if (ent == NULL)
3501 return FALSE;
3502 ent->next = eh->elf.plt.plist;
3503 ent->addend = addend;
3504 ent->plt.refcount = 0;
3505 eh->elf.plt.plist = ent;
3506 }
3507 ent->plt.refcount += 1;
3508 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3509 eh->is_func = 1;
3510 return TRUE;
3511 }
3512
3513 /* Find the function descriptor hash entry from the given function code
3514 hash entry FH. Link the entries via their OH fields. */
3515 static struct ppc_link_hash_entry *
3516 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3517 {
3518 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3519
3520 if (fdh == NULL)
3521 {
3522 const char *fd_name = fh->elf.root.root.string + 1;
3523
3524 fdh = (struct ppc_link_hash_entry *)
3525 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3526 if (fdh != NULL)
3527 {
3528 fdh->is_func_descriptor = 1;
3529 fdh->oh = &fh->elf;
3530 fh->is_func = 1;
3531 fh->oh = &fdh->elf;
3532 }
3533 }
3534
3535 return fdh;
3536 }
3537
3538 /* Look through the relocs for a section during the first phase, and
3539 calculate needed space in the global offset table, procedure
3540 linkage table, and dynamic reloc sections. */
3541
3542 static bfd_boolean
3543 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3544 asection *sec, const Elf_Internal_Rela *relocs)
3545 {
3546 struct ppc_link_hash_table *htab;
3547 Elf_Internal_Shdr *symtab_hdr;
3548 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3549 const Elf_Internal_Rela *rel;
3550 const Elf_Internal_Rela *rel_end;
3551 asection *sreloc;
3552 asection **opd_sym_map;
3553
3554 if (info->relocatable)
3555 return TRUE;
3556
3557 htab = ppc_hash_table (info);
3558 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3559
3560 sym_hashes = elf_sym_hashes (abfd);
3561 sym_hashes_end = (sym_hashes
3562 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3563 - symtab_hdr->sh_info);
3564
3565 sreloc = NULL;
3566 opd_sym_map = NULL;
3567 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3568 {
3569 /* Garbage collection needs some extra help with .opd sections.
3570 We don't want to necessarily keep everything referenced by
3571 relocs in .opd, as that would keep all functions. Instead,
3572 if we reference an .opd symbol (a function descriptor), we
3573 want to keep the function code symbol's section. This is
3574 easy for global symbols, but for local syms we need to keep
3575 information about the associated function section. Later, if
3576 edit_opd deletes entries, we'll use this array to adjust
3577 local syms in .opd. */
3578 union opd_info {
3579 asection *func_section;
3580 long entry_adjust;
3581 };
3582 bfd_size_type amt;
3583
3584 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3585 opd_sym_map = bfd_zalloc (abfd, amt);
3586 if (opd_sym_map == NULL)
3587 return FALSE;
3588 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3589 }
3590
3591 if (htab->sfpr == NULL
3592 && !create_linkage_sections (htab->elf.dynobj, info))
3593 return FALSE;
3594
3595 rel_end = relocs + sec->reloc_count;
3596 for (rel = relocs; rel < rel_end; rel++)
3597 {
3598 unsigned long r_symndx;
3599 struct elf_link_hash_entry *h;
3600 enum elf_ppc64_reloc_type r_type;
3601 int tls_type = 0;
3602
3603 r_symndx = ELF64_R_SYM (rel->r_info);
3604 if (r_symndx < symtab_hdr->sh_info)
3605 h = NULL;
3606 else
3607 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3608
3609 r_type = ELF64_R_TYPE (rel->r_info);
3610 switch (r_type)
3611 {
3612 case R_PPC64_GOT_TLSLD16:
3613 case R_PPC64_GOT_TLSLD16_LO:
3614 case R_PPC64_GOT_TLSLD16_HI:
3615 case R_PPC64_GOT_TLSLD16_HA:
3616 ppc64_tlsld_got (abfd)->refcount += 1;
3617 tls_type = TLS_TLS | TLS_LD;
3618 goto dogottls;
3619
3620 case R_PPC64_GOT_TLSGD16:
3621 case R_PPC64_GOT_TLSGD16_LO:
3622 case R_PPC64_GOT_TLSGD16_HI:
3623 case R_PPC64_GOT_TLSGD16_HA:
3624 tls_type = TLS_TLS | TLS_GD;
3625 goto dogottls;
3626
3627 case R_PPC64_GOT_TPREL16_DS:
3628 case R_PPC64_GOT_TPREL16_LO_DS:
3629 case R_PPC64_GOT_TPREL16_HI:
3630 case R_PPC64_GOT_TPREL16_HA:
3631 if (info->shared)
3632 info->flags |= DF_STATIC_TLS;
3633 tls_type = TLS_TLS | TLS_TPREL;
3634 goto dogottls;
3635
3636 case R_PPC64_GOT_DTPREL16_DS:
3637 case R_PPC64_GOT_DTPREL16_LO_DS:
3638 case R_PPC64_GOT_DTPREL16_HI:
3639 case R_PPC64_GOT_DTPREL16_HA:
3640 tls_type = TLS_TLS | TLS_DTPREL;
3641 dogottls:
3642 sec->has_tls_reloc = 1;
3643 /* Fall thru */
3644
3645 case R_PPC64_GOT16:
3646 case R_PPC64_GOT16_DS:
3647 case R_PPC64_GOT16_HA:
3648 case R_PPC64_GOT16_HI:
3649 case R_PPC64_GOT16_LO:
3650 case R_PPC64_GOT16_LO_DS:
3651 /* This symbol requires a global offset table entry. */
3652 sec->has_gp_reloc = 1;
3653 if (ppc64_elf_tdata (abfd)->got == NULL
3654 && !create_got_section (abfd, info))
3655 return FALSE;
3656
3657 if (h != NULL)
3658 {
3659 struct ppc_link_hash_entry *eh;
3660 struct got_entry *ent;
3661
3662 eh = (struct ppc_link_hash_entry *) h;
3663 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3664 if (ent->addend == rel->r_addend
3665 && ent->owner == abfd
3666 && ent->tls_type == tls_type)
3667 break;
3668 if (ent == NULL)
3669 {
3670 bfd_size_type amt = sizeof (*ent);
3671 ent = bfd_alloc (abfd, amt);
3672 if (ent == NULL)
3673 return FALSE;
3674 ent->next = eh->elf.got.glist;
3675 ent->addend = rel->r_addend;
3676 ent->owner = abfd;
3677 ent->tls_type = tls_type;
3678 ent->got.refcount = 0;
3679 eh->elf.got.glist = ent;
3680 }
3681 ent->got.refcount += 1;
3682 eh->tls_mask |= tls_type;
3683 }
3684 else
3685 /* This is a global offset table entry for a local symbol. */
3686 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3687 rel->r_addend, tls_type))
3688 return FALSE;
3689 break;
3690
3691 case R_PPC64_PLT16_HA:
3692 case R_PPC64_PLT16_HI:
3693 case R_PPC64_PLT16_LO:
3694 case R_PPC64_PLT32:
3695 case R_PPC64_PLT64:
3696 /* This symbol requires a procedure linkage table entry. We
3697 actually build the entry in adjust_dynamic_symbol,
3698 because this might be a case of linking PIC code without
3699 linking in any dynamic objects, in which case we don't
3700 need to generate a procedure linkage table after all. */
3701 if (h == NULL)
3702 {
3703 /* It does not make sense to have a procedure linkage
3704 table entry for a local symbol. */
3705 bfd_set_error (bfd_error_bad_value);
3706 return FALSE;
3707 }
3708 else
3709 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3710 rel->r_addend))
3711 return FALSE;
3712 break;
3713
3714 /* The following relocations don't need to propagate the
3715 relocation if linking a shared object since they are
3716 section relative. */
3717 case R_PPC64_SECTOFF:
3718 case R_PPC64_SECTOFF_LO:
3719 case R_PPC64_SECTOFF_HI:
3720 case R_PPC64_SECTOFF_HA:
3721 case R_PPC64_SECTOFF_DS:
3722 case R_PPC64_SECTOFF_LO_DS:
3723 case R_PPC64_DTPREL16:
3724 case R_PPC64_DTPREL16_LO:
3725 case R_PPC64_DTPREL16_HI:
3726 case R_PPC64_DTPREL16_HA:
3727 case R_PPC64_DTPREL16_DS:
3728 case R_PPC64_DTPREL16_LO_DS:
3729 case R_PPC64_DTPREL16_HIGHER:
3730 case R_PPC64_DTPREL16_HIGHERA:
3731 case R_PPC64_DTPREL16_HIGHEST:
3732 case R_PPC64_DTPREL16_HIGHESTA:
3733 break;
3734
3735 /* Nor do these. */
3736 case R_PPC64_TOC16:
3737 case R_PPC64_TOC16_LO:
3738 case R_PPC64_TOC16_HI:
3739 case R_PPC64_TOC16_HA:
3740 case R_PPC64_TOC16_DS:
3741 case R_PPC64_TOC16_LO_DS:
3742 sec->has_gp_reloc = 1;
3743 break;
3744
3745 /* This relocation describes the C++ object vtable hierarchy.
3746 Reconstruct it for later use during GC. */
3747 case R_PPC64_GNU_VTINHERIT:
3748 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3749 return FALSE;
3750 break;
3751
3752 /* This relocation describes which C++ vtable entries are actually
3753 used. Record for later use during GC. */
3754 case R_PPC64_GNU_VTENTRY:
3755 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3756 return FALSE;
3757 break;
3758
3759 case R_PPC64_REL14:
3760 case R_PPC64_REL14_BRTAKEN:
3761 case R_PPC64_REL14_BRNTAKEN:
3762 htab->has_14bit_branch = 1;
3763 /* Fall through. */
3764
3765 case R_PPC64_REL24:
3766 if (h != NULL
3767 && h->root.root.string[0] == '.'
3768 && h->root.root.string[1] != 0)
3769 {
3770 /* We may need a .plt entry if the function this reloc
3771 refers to is in a shared lib. */
3772 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3773 rel->r_addend))
3774 return FALSE;
3775 if (h == htab->tls_get_addr)
3776 sec->has_tls_reloc = 1;
3777 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3778 == 0)
3779 && (h->root.root.string[15] == 0
3780 || h->root.root.string[15] == '@'))
3781 {
3782 htab->tls_get_addr = h;
3783 sec->has_tls_reloc = 1;
3784 }
3785 }
3786 break;
3787
3788 case R_PPC64_TPREL64:
3789 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3790 if (info->shared)
3791 info->flags |= DF_STATIC_TLS;
3792 goto dotlstoc;
3793
3794 case R_PPC64_DTPMOD64:
3795 if (rel + 1 < rel_end
3796 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3797 && rel[1].r_offset == rel->r_offset + 8)
3798 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3799 else
3800 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3801 goto dotlstoc;
3802
3803 case R_PPC64_DTPREL64:
3804 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3805 if (rel != relocs
3806 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3807 && rel[-1].r_offset == rel->r_offset - 8)
3808 /* This is the second reloc of a dtpmod, dtprel pair.
3809 Don't mark with TLS_DTPREL. */
3810 goto dodyn;
3811
3812 dotlstoc:
3813 sec->has_tls_reloc = 1;
3814 if (h != NULL)
3815 {
3816 struct ppc_link_hash_entry *eh;
3817 eh = (struct ppc_link_hash_entry *) h;
3818 eh->tls_mask |= tls_type;
3819 }
3820 else
3821 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3822 rel->r_addend, tls_type))
3823 return FALSE;
3824
3825 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3826 {
3827 /* One extra to simplify get_tls_mask. */
3828 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3829 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3830 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3831 return FALSE;
3832 }
3833 BFD_ASSERT (rel->r_offset % 8 == 0);
3834 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3835
3836 /* Mark the second slot of a GD or LD entry.
3837 -1 to indicate GD and -2 to indicate LD. */
3838 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3839 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3840 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3841 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3842 goto dodyn;
3843
3844 case R_PPC64_TPREL16:
3845 case R_PPC64_TPREL16_LO:
3846 case R_PPC64_TPREL16_HI:
3847 case R_PPC64_TPREL16_HA:
3848 case R_PPC64_TPREL16_DS:
3849 case R_PPC64_TPREL16_LO_DS:
3850 case R_PPC64_TPREL16_HIGHER:
3851 case R_PPC64_TPREL16_HIGHERA:
3852 case R_PPC64_TPREL16_HIGHEST:
3853 case R_PPC64_TPREL16_HIGHESTA:
3854 if (info->shared)
3855 {
3856 info->flags |= DF_STATIC_TLS;
3857 goto dodyn;
3858 }
3859 break;
3860
3861 case R_PPC64_ADDR64:
3862 if (opd_sym_map != NULL
3863 && h != NULL
3864 && h->root.root.string[0] == '.'
3865 && h->root.root.string[1] != 0)
3866 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3867
3868 if (opd_sym_map != NULL
3869 && h == NULL
3870 && rel + 1 < rel_end
3871 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3872 {
3873 asection *s;
3874
3875 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3876 r_symndx);
3877 if (s == NULL)
3878 return FALSE;
3879 else if (s != sec)
3880 opd_sym_map[rel->r_offset / 24] = s;
3881 }
3882 /* Fall through. */
3883
3884 case R_PPC64_REL30:
3885 case R_PPC64_REL32:
3886 case R_PPC64_REL64:
3887 case R_PPC64_ADDR14:
3888 case R_PPC64_ADDR14_BRNTAKEN:
3889 case R_PPC64_ADDR14_BRTAKEN:
3890 case R_PPC64_ADDR16:
3891 case R_PPC64_ADDR16_DS:
3892 case R_PPC64_ADDR16_HA:
3893 case R_PPC64_ADDR16_HI:
3894 case R_PPC64_ADDR16_HIGHER:
3895 case R_PPC64_ADDR16_HIGHERA:
3896 case R_PPC64_ADDR16_HIGHEST:
3897 case R_PPC64_ADDR16_HIGHESTA:
3898 case R_PPC64_ADDR16_LO:
3899 case R_PPC64_ADDR16_LO_DS:
3900 case R_PPC64_ADDR24:
3901 case R_PPC64_ADDR32:
3902 case R_PPC64_UADDR16:
3903 case R_PPC64_UADDR32:
3904 case R_PPC64_UADDR64:
3905 case R_PPC64_TOC:
3906 if (h != NULL && !info->shared)
3907 /* We may need a copy reloc. */
3908 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3909
3910 /* Don't propagate .opd relocs. */
3911 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3912 break;
3913
3914 /* Don't propagate relocs that the dynamic linker won't relocate. */
3915 if ((sec->flags & SEC_ALLOC) == 0)
3916 break;
3917
3918 /* If we are creating a shared library, and this is a reloc
3919 against a global symbol, or a non PC relative reloc
3920 against a local symbol, then we need to copy the reloc
3921 into the shared library. However, if we are linking with
3922 -Bsymbolic, we do not need to copy a reloc against a
3923 global symbol which is defined in an object we are
3924 including in the link (i.e., DEF_REGULAR is set). At
3925 this point we have not seen all the input files, so it is
3926 possible that DEF_REGULAR is not set now but will be set
3927 later (it is never cleared). In case of a weak definition,
3928 DEF_REGULAR may be cleared later by a strong definition in
3929 a shared library. We account for that possibility below by
3930 storing information in the dyn_relocs field of the hash
3931 table entry. A similar situation occurs when creating
3932 shared libraries and symbol visibility changes render the
3933 symbol local.
3934
3935 If on the other hand, we are creating an executable, we
3936 may need to keep relocations for symbols satisfied by a
3937 dynamic library if we manage to avoid copy relocs for the
3938 symbol. */
3939 dodyn:
3940 if ((info->shared
3941 && (MUST_BE_DYN_RELOC (r_type)
3942 || (h != NULL
3943 && (! info->symbolic
3944 || h->root.type == bfd_link_hash_defweak
3945 || (h->elf_link_hash_flags
3946 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3947 || (ELIMINATE_COPY_RELOCS
3948 && !info->shared
3949 && h != NULL
3950 && (h->root.type == bfd_link_hash_defweak
3951 || (h->elf_link_hash_flags
3952 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3953 {
3954 struct ppc_dyn_relocs *p;
3955 struct ppc_dyn_relocs **head;
3956
3957 /* We must copy these reloc types into the output file.
3958 Create a reloc section in dynobj and make room for
3959 this reloc. */
3960 if (sreloc == NULL)
3961 {
3962 const char *name;
3963 bfd *dynobj;
3964
3965 name = (bfd_elf_string_from_elf_section
3966 (abfd,
3967 elf_elfheader (abfd)->e_shstrndx,
3968 elf_section_data (sec)->rel_hdr.sh_name));
3969 if (name == NULL)
3970 return FALSE;
3971
3972 if (strncmp (name, ".rela", 5) != 0
3973 || strcmp (bfd_get_section_name (abfd, sec),
3974 name + 5) != 0)
3975 {
3976 (*_bfd_error_handler)
3977 (_("%s: bad relocation section name `%s\'"),
3978 bfd_archive_filename (abfd), name);
3979 bfd_set_error (bfd_error_bad_value);
3980 }
3981
3982 dynobj = htab->elf.dynobj;
3983 sreloc = bfd_get_section_by_name (dynobj, name);
3984 if (sreloc == NULL)
3985 {
3986 flagword flags;
3987
3988 sreloc = bfd_make_section (dynobj, name);
3989 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3990 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3991 if ((sec->flags & SEC_ALLOC) != 0)
3992 flags |= SEC_ALLOC | SEC_LOAD;
3993 if (sreloc == NULL
3994 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3995 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
3996 return FALSE;
3997 }
3998 elf_section_data (sec)->sreloc = sreloc;
3999 }
4000
4001 /* If this is a global symbol, we count the number of
4002 relocations we need for this symbol. */
4003 if (h != NULL)
4004 {
4005 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4006 }
4007 else
4008 {
4009 /* Track dynamic relocs needed for local syms too.
4010 We really need local syms available to do this
4011 easily. Oh well. */
4012
4013 asection *s;
4014 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4015 sec, r_symndx);
4016 if (s == NULL)
4017 return FALSE;
4018
4019 head = ((struct ppc_dyn_relocs **)
4020 &elf_section_data (s)->local_dynrel);
4021 }
4022
4023 p = *head;
4024 if (p == NULL || p->sec != sec)
4025 {
4026 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4027 if (p == NULL)
4028 return FALSE;
4029 p->next = *head;
4030 *head = p;
4031 p->sec = sec;
4032 p->count = 0;
4033 p->pc_count = 0;
4034 }
4035
4036 p->count += 1;
4037 if (!MUST_BE_DYN_RELOC (r_type))
4038 p->pc_count += 1;
4039 }
4040 break;
4041
4042 default:
4043 break;
4044 }
4045 }
4046
4047 return TRUE;
4048 }
4049
4050 /* Return the section that should be marked against GC for a given
4051 relocation. */
4052
4053 static asection *
4054 ppc64_elf_gc_mark_hook (asection *sec,
4055 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4056 Elf_Internal_Rela *rel,
4057 struct elf_link_hash_entry *h,
4058 Elf_Internal_Sym *sym)
4059 {
4060 asection *rsec = NULL;
4061
4062 if (h != NULL)
4063 {
4064 enum elf_ppc64_reloc_type r_type;
4065 struct ppc_link_hash_entry *fdh;
4066
4067 r_type = ELF64_R_TYPE (rel->r_info);
4068 switch (r_type)
4069 {
4070 case R_PPC64_GNU_VTINHERIT:
4071 case R_PPC64_GNU_VTENTRY:
4072 break;
4073
4074 default:
4075 switch (h->root.type)
4076 {
4077 case bfd_link_hash_defined:
4078 case bfd_link_hash_defweak:
4079 fdh = (struct ppc_link_hash_entry *) h;
4080
4081 /* Function descriptor syms cause the associated
4082 function code sym section to be marked. */
4083 if (fdh->is_func_descriptor)
4084 rsec = fdh->oh->root.u.def.section;
4085
4086 /* Function entry syms return NULL if they are in .opd
4087 and are not ._start (or others undefined on the ld
4088 command line). Thus we avoid marking all function
4089 sections, as all functions are referenced in .opd. */
4090 else if ((fdh->oh != NULL
4091 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4092 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4093 rsec = h->root.u.def.section;
4094 break;
4095
4096 case bfd_link_hash_common:
4097 rsec = h->root.u.c.p->section;
4098 break;
4099
4100 default:
4101 break;
4102 }
4103 }
4104 }
4105 else
4106 {
4107 asection **opd_sym_section;
4108
4109 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4110 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4111 if (opd_sym_section != NULL)
4112 rsec = opd_sym_section[sym->st_value / 24];
4113 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4114 rsec = NULL;
4115 }
4116
4117 return rsec;
4118 }
4119
4120 /* Update the .got, .plt. and dynamic reloc reference counts for the
4121 section being removed. */
4122
4123 static bfd_boolean
4124 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4125 asection *sec, const Elf_Internal_Rela *relocs)
4126 {
4127 struct ppc_link_hash_table *htab;
4128 Elf_Internal_Shdr *symtab_hdr;
4129 struct elf_link_hash_entry **sym_hashes;
4130 struct got_entry **local_got_ents;
4131 const Elf_Internal_Rela *rel, *relend;
4132
4133 elf_section_data (sec)->local_dynrel = NULL;
4134
4135 htab = ppc_hash_table (info);
4136 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4137 sym_hashes = elf_sym_hashes (abfd);
4138 local_got_ents = elf_local_got_ents (abfd);
4139
4140 relend = relocs + sec->reloc_count;
4141 for (rel = relocs; rel < relend; rel++)
4142 {
4143 unsigned long r_symndx;
4144 enum elf_ppc64_reloc_type r_type;
4145 struct elf_link_hash_entry *h = NULL;
4146 char tls_type = 0;
4147
4148 r_symndx = ELF64_R_SYM (rel->r_info);
4149 r_type = ELF64_R_TYPE (rel->r_info);
4150 if (r_symndx >= symtab_hdr->sh_info)
4151 {
4152 struct ppc_link_hash_entry *eh;
4153 struct ppc_dyn_relocs **pp;
4154 struct ppc_dyn_relocs *p;
4155
4156 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4157 eh = (struct ppc_link_hash_entry *) h;
4158
4159 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4160 if (p->sec == sec)
4161 {
4162 /* Everything must go for SEC. */
4163 *pp = p->next;
4164 break;
4165 }
4166 }
4167
4168 switch (r_type)
4169 {
4170 case R_PPC64_GOT_TLSLD16:
4171 case R_PPC64_GOT_TLSLD16_LO:
4172 case R_PPC64_GOT_TLSLD16_HI:
4173 case R_PPC64_GOT_TLSLD16_HA:
4174 ppc64_tlsld_got (abfd)->refcount -= 1;
4175 tls_type = TLS_TLS | TLS_LD;
4176 goto dogot;
4177
4178 case R_PPC64_GOT_TLSGD16:
4179 case R_PPC64_GOT_TLSGD16_LO:
4180 case R_PPC64_GOT_TLSGD16_HI:
4181 case R_PPC64_GOT_TLSGD16_HA:
4182 tls_type = TLS_TLS | TLS_GD;
4183 goto dogot;
4184
4185 case R_PPC64_GOT_TPREL16_DS:
4186 case R_PPC64_GOT_TPREL16_LO_DS:
4187 case R_PPC64_GOT_TPREL16_HI:
4188 case R_PPC64_GOT_TPREL16_HA:
4189 tls_type = TLS_TLS | TLS_TPREL;
4190 goto dogot;
4191
4192 case R_PPC64_GOT_DTPREL16_DS:
4193 case R_PPC64_GOT_DTPREL16_LO_DS:
4194 case R_PPC64_GOT_DTPREL16_HI:
4195 case R_PPC64_GOT_DTPREL16_HA:
4196 tls_type = TLS_TLS | TLS_DTPREL;
4197 goto dogot;
4198
4199 case R_PPC64_GOT16:
4200 case R_PPC64_GOT16_DS:
4201 case R_PPC64_GOT16_HA:
4202 case R_PPC64_GOT16_HI:
4203 case R_PPC64_GOT16_LO:
4204 case R_PPC64_GOT16_LO_DS:
4205 dogot:
4206 {
4207 struct got_entry *ent;
4208
4209 if (h != NULL)
4210 ent = h->got.glist;
4211 else
4212 ent = local_got_ents[r_symndx];
4213
4214 for (; ent != NULL; ent = ent->next)
4215 if (ent->addend == rel->r_addend
4216 && ent->owner == abfd
4217 && ent->tls_type == tls_type)
4218 break;
4219 if (ent == NULL)
4220 abort ();
4221 if (ent->got.refcount > 0)
4222 ent->got.refcount -= 1;
4223 }
4224 break;
4225
4226 case R_PPC64_PLT16_HA:
4227 case R_PPC64_PLT16_HI:
4228 case R_PPC64_PLT16_LO:
4229 case R_PPC64_PLT32:
4230 case R_PPC64_PLT64:
4231 case R_PPC64_REL14:
4232 case R_PPC64_REL14_BRNTAKEN:
4233 case R_PPC64_REL14_BRTAKEN:
4234 case R_PPC64_REL24:
4235 if (h != NULL)
4236 {
4237 struct plt_entry *ent;
4238
4239 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4240 if (ent->addend == rel->r_addend)
4241 break;
4242 if (ent == NULL)
4243 abort ();
4244 if (ent->plt.refcount > 0)
4245 ent->plt.refcount -= 1;
4246 }
4247 break;
4248
4249 default:
4250 break;
4251 }
4252 }
4253 return TRUE;
4254 }
4255
4256 /* Called via elf_link_hash_traverse to transfer dynamic linking
4257 information on function code symbol entries to their corresponding
4258 function descriptor symbol entries. */
4259 static bfd_boolean
4260 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4261 {
4262 struct bfd_link_info *info;
4263 struct ppc_link_hash_table *htab;
4264 struct plt_entry *ent;
4265 struct ppc_link_hash_entry *fh;
4266 struct ppc_link_hash_entry *fdh;
4267 bfd_boolean force_local;
4268
4269 fh = (struct ppc_link_hash_entry *) h;
4270 if (fh->elf.root.type == bfd_link_hash_indirect)
4271 return TRUE;
4272
4273 if (fh->elf.root.type == bfd_link_hash_warning)
4274 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4275
4276 info = inf;
4277 htab = ppc_hash_table (info);
4278
4279 /* If this is a function code symbol, transfer dynamic linking
4280 information to the function descriptor symbol. */
4281 if (!fh->is_func)
4282 return TRUE;
4283
4284 if (fh->elf.root.type == bfd_link_hash_undefweak
4285 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4286 htab->have_undefweak = TRUE;
4287
4288 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4289 if (ent->plt.refcount > 0)
4290 break;
4291 if (ent == NULL
4292 || fh->elf.root.root.string[0] != '.'
4293 || fh->elf.root.root.string[1] == '\0')
4294 return TRUE;
4295
4296 /* Find the corresponding function descriptor symbol. Create it
4297 as undefined if necessary. */
4298
4299 fdh = get_fdh (fh, htab);
4300 if (fdh != NULL)
4301 while (fdh->elf.root.type == bfd_link_hash_indirect
4302 || fdh->elf.root.type == bfd_link_hash_warning)
4303 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4304
4305 if (fdh == NULL
4306 && info->shared
4307 && (fh->elf.root.type == bfd_link_hash_undefined
4308 || fh->elf.root.type == bfd_link_hash_undefweak))
4309 {
4310 bfd *abfd;
4311 asymbol *newsym;
4312 struct bfd_link_hash_entry *bh;
4313
4314 abfd = fh->elf.root.u.undef.abfd;
4315 newsym = bfd_make_empty_symbol (abfd);
4316 newsym->name = fh->elf.root.root.string + 1;
4317 newsym->section = bfd_und_section_ptr;
4318 newsym->value = 0;
4319 newsym->flags = BSF_OBJECT;
4320 if (fh->elf.root.type == bfd_link_hash_undefweak)
4321 newsym->flags |= BSF_WEAK;
4322
4323 bh = &fdh->elf.root;
4324 if ( !(_bfd_generic_link_add_one_symbol
4325 (info, abfd, newsym->name, newsym->flags,
4326 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4327 {
4328 return FALSE;
4329 }
4330 fdh = (struct ppc_link_hash_entry *) bh;
4331 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4332 fdh->elf.size = 24;
4333 fdh->elf.type = STT_OBJECT;
4334 }
4335
4336 if (fdh != NULL
4337 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4338 && (info->shared
4339 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4340 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4341 || (fdh->elf.root.type == bfd_link_hash_undefweak
4342 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4343 {
4344 if (fdh->elf.dynindx == -1)
4345 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4346 return FALSE;
4347 fdh->elf.elf_link_hash_flags
4348 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4349 | ELF_LINK_HASH_REF_DYNAMIC
4350 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4351 | ELF_LINK_NON_GOT_REF));
4352 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4353 {
4354 fdh->elf.plt.plist = fh->elf.plt.plist;
4355 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4356 }
4357 fdh->is_func_descriptor = 1;
4358 fdh->oh = &fh->elf;
4359 fh->oh = &fdh->elf;
4360 }
4361
4362 /* Now that the info is on the function descriptor, clear the
4363 function code sym info. Any function code syms for which we
4364 don't have a definition in a regular file, we force local.
4365 This prevents a shared library from exporting syms that have
4366 been imported from another library. Function code syms that
4367 are really in the library we must leave global to prevent the
4368 linker dragging in a definition from a static library. */
4369 force_local
4370 = (info->shared
4371 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4372 || fdh == NULL
4373 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4374 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4375 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4376
4377 return TRUE;
4378 }
4379
4380 #define MIN_SAVE_FPR 14
4381 #define MAX_SAVE_FPR 31
4382
4383 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4384 this hook to a) provide some gcc support functions, and b) transfer
4385 dynamic linking information gathered so far on function code symbol
4386 entries, to their corresponding function descriptor symbol entries. */
4387 static bfd_boolean
4388 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4389 struct bfd_link_info *info)
4390 {
4391 struct ppc_link_hash_table *htab;
4392 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4393 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4394 unsigned int i;
4395 struct elf_link_hash_entry *h;
4396 bfd_byte *p;
4397 char sym[10];
4398
4399 htab = ppc_hash_table (info);
4400
4401 if (htab->sfpr == NULL)
4402 /* We don't have any relocs. */
4403 return TRUE;
4404
4405 /* First provide any missing ._savef* and ._restf* functions. */
4406 memcpy (sym, "._savef14", 10);
4407 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4408 {
4409 sym[7] = i / 10 + '0';
4410 sym[8] = i % 10 + '0';
4411 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4412 if (h != NULL
4413 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4414 {
4415 if (lowest_savef > i)
4416 lowest_savef = i;
4417 h->root.type = bfd_link_hash_defined;
4418 h->root.u.def.section = htab->sfpr;
4419 h->root.u.def.value = (i - lowest_savef) * 4;
4420 h->type = STT_FUNC;
4421 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4422 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4423 }
4424 }
4425
4426 memcpy (sym, "._restf14", 10);
4427 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4428 {
4429 sym[7] = i / 10 + '0';
4430 sym[8] = i % 10 + '0';
4431 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4432 if (h != NULL
4433 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4434 {
4435 if (lowest_restf > i)
4436 lowest_restf = i;
4437 h->root.type = bfd_link_hash_defined;
4438 h->root.u.def.section = htab->sfpr;
4439 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4440 + (i - lowest_restf) * 4);
4441 h->type = STT_FUNC;
4442 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4443 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4444 }
4445 }
4446
4447 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4448
4449 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4450 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4451
4452 if (htab->sfpr->_raw_size == 0)
4453 {
4454 if (!htab->have_undefweak)
4455 {
4456 _bfd_strip_section_from_output (info, htab->sfpr);
4457 return TRUE;
4458 }
4459
4460 htab->sfpr->_raw_size = 4;
4461 }
4462
4463 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4464 if (p == NULL)
4465 return FALSE;
4466 htab->sfpr->contents = p;
4467
4468 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4469 {
4470 unsigned int fpr = i << 21;
4471 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4472 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4473 p += 4;
4474 }
4475 if (lowest_savef <= MAX_SAVE_FPR)
4476 {
4477 bfd_put_32 (htab->elf.dynobj, BLR, p);
4478 p += 4;
4479 }
4480
4481 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4482 {
4483 unsigned int fpr = i << 21;
4484 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4485 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4486 p += 4;
4487 }
4488 if (lowest_restf <= MAX_SAVE_FPR
4489 || htab->sfpr->_raw_size == 4)
4490 {
4491 bfd_put_32 (htab->elf.dynobj, BLR, p);
4492 }
4493
4494 return TRUE;
4495 }
4496
4497 /* Adjust a symbol defined by a dynamic object and referenced by a
4498 regular object. The current definition is in some section of the
4499 dynamic object, but we're not including those sections. We have to
4500 change the definition to something the rest of the link can
4501 understand. */
4502
4503 static bfd_boolean
4504 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4505 struct elf_link_hash_entry *h)
4506 {
4507 struct ppc_link_hash_table *htab;
4508 asection *s;
4509 unsigned int power_of_two;
4510
4511 htab = ppc_hash_table (info);
4512
4513 /* Deal with function syms. */
4514 if (h->type == STT_FUNC
4515 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4516 {
4517 /* Clear procedure linkage table information for any symbol that
4518 won't need a .plt entry. */
4519 struct plt_entry *ent;
4520 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4521 if (ent->plt.refcount > 0)
4522 break;
4523 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4524 || ent == NULL
4525 || SYMBOL_CALLS_LOCAL (info, h)
4526 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4527 && h->root.type == bfd_link_hash_undefweak))
4528 {
4529 h->plt.plist = NULL;
4530 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4531 }
4532 }
4533 else
4534 h->plt.plist = NULL;
4535
4536 /* If this is a weak symbol, and there is a real definition, the
4537 processor independent code will have arranged for us to see the
4538 real definition first, and we can just use the same value. */
4539 if (h->weakdef != NULL)
4540 {
4541 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4542 || h->weakdef->root.type == bfd_link_hash_defweak);
4543 h->root.u.def.section = h->weakdef->root.u.def.section;
4544 h->root.u.def.value = h->weakdef->root.u.def.value;
4545 if (ELIMINATE_COPY_RELOCS)
4546 h->elf_link_hash_flags
4547 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4548 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4549 return TRUE;
4550 }
4551
4552 /* If we are creating a shared library, we must presume that the
4553 only references to the symbol are via the global offset table.
4554 For such cases we need not do anything here; the relocations will
4555 be handled correctly by relocate_section. */
4556 if (info->shared)
4557 return TRUE;
4558
4559 /* If there are no references to this symbol that do not use the
4560 GOT, we don't need to generate a copy reloc. */
4561 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4562 return TRUE;
4563
4564 if (ELIMINATE_COPY_RELOCS)
4565 {
4566 struct ppc_link_hash_entry * eh;
4567 struct ppc_dyn_relocs *p;
4568
4569 eh = (struct ppc_link_hash_entry *) h;
4570 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4571 {
4572 s = p->sec->output_section;
4573 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4574 break;
4575 }
4576
4577 /* If we didn't find any dynamic relocs in read-only sections, then
4578 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4579 if (p == NULL)
4580 {
4581 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4582 return TRUE;
4583 }
4584 }
4585
4586 if (h->plt.plist != NULL)
4587 {
4588 /* We should never get here, but unfortunately there are versions
4589 of gcc out there that improperly (for this ABI) put initialized
4590 function pointers, vtable refs and suchlike in read-only
4591 sections. Allow them to proceed, but warn that this might
4592 break at runtime. */
4593 (*_bfd_error_handler)
4594 (_("copy reloc against `%s' requires lazy plt linking; "
4595 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4596 h->root.root.string);
4597 }
4598
4599 /* This is a reference to a symbol defined by a dynamic object which
4600 is not a function. */
4601
4602 /* We must allocate the symbol in our .dynbss section, which will
4603 become part of the .bss section of the executable. There will be
4604 an entry for this symbol in the .dynsym section. The dynamic
4605 object will contain position independent code, so all references
4606 from the dynamic object to this symbol will go through the global
4607 offset table. The dynamic linker will use the .dynsym entry to
4608 determine the address it must put in the global offset table, so
4609 both the dynamic object and the regular object will refer to the
4610 same memory location for the variable. */
4611
4612 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4613 to copy the initial value out of the dynamic object and into the
4614 runtime process image. We need to remember the offset into the
4615 .rela.bss section we are going to use. */
4616 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4617 {
4618 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4619 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4620 }
4621
4622 /* We need to figure out the alignment required for this symbol. I
4623 have no idea how ELF linkers handle this. */
4624 power_of_two = bfd_log2 (h->size);
4625 if (power_of_two > 4)
4626 power_of_two = 4;
4627
4628 /* Apply the required alignment. */
4629 s = htab->dynbss;
4630 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4631 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4632 {
4633 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4634 return FALSE;
4635 }
4636
4637 /* Define the symbol as being at this point in the section. */
4638 h->root.u.def.section = s;
4639 h->root.u.def.value = s->_raw_size;
4640
4641 /* Increment the section size to make room for the symbol. */
4642 s->_raw_size += h->size;
4643
4644 return TRUE;
4645 }
4646
4647 /* If given a function descriptor symbol, hide both the function code
4648 sym and the descriptor. */
4649 static void
4650 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4651 struct elf_link_hash_entry *h,
4652 bfd_boolean force_local)
4653 {
4654 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4655
4656 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4657 {
4658 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4659
4660 if (fh == NULL)
4661 {
4662 const char *p, *q;
4663 struct ppc_link_hash_table *htab;
4664 char save;
4665
4666 /* We aren't supposed to use alloca in BFD because on
4667 systems which do not have alloca the version in libiberty
4668 calls xmalloc, which might cause the program to crash
4669 when it runs out of memory. This function doesn't have a
4670 return status, so there's no way to gracefully return an
4671 error. So cheat. We know that string[-1] can be safely
4672 dereferenced; It's either a string in an ELF string
4673 table, or allocated in an objalloc structure. */
4674
4675 p = h->root.root.string - 1;
4676 save = *p;
4677 *(char *) p = '.';
4678 htab = ppc_hash_table (info);
4679 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4680 *(char *) p = save;
4681
4682 /* Unfortunately, if it so happens that the string we were
4683 looking for was allocated immediately before this string,
4684 then we overwrote the string terminator. That's the only
4685 reason the lookup should fail. */
4686 if (fh == NULL)
4687 {
4688 q = h->root.root.string + strlen (h->root.root.string);
4689 while (q >= h->root.root.string && *q == *p)
4690 --q, --p;
4691 if (q < h->root.root.string && *p == '.')
4692 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4693 }
4694 if (fh != NULL)
4695 {
4696 ((struct ppc_link_hash_entry *) h)->oh = fh;
4697 ((struct ppc_link_hash_entry *) fh)->oh = h;
4698 }
4699 }
4700 if (fh != NULL)
4701 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4702 }
4703 }
4704
4705 static bfd_boolean
4706 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4707 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4708 unsigned long r_symndx, bfd *ibfd)
4709 {
4710 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4711
4712 if (r_symndx >= symtab_hdr->sh_info)
4713 {
4714 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4715 struct elf_link_hash_entry *h;
4716
4717 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4718 while (h->root.type == bfd_link_hash_indirect
4719 || h->root.type == bfd_link_hash_warning)
4720 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4721
4722 if (hp != NULL)
4723 *hp = h;
4724
4725 if (symp != NULL)
4726 *symp = NULL;
4727
4728 if (symsecp != NULL)
4729 {
4730 asection *symsec = NULL;
4731 if (h->root.type == bfd_link_hash_defined
4732 || h->root.type == bfd_link_hash_defweak)
4733 symsec = h->root.u.def.section;
4734 *symsecp = symsec;
4735 }
4736
4737 if (tls_maskp != NULL)
4738 {
4739 struct ppc_link_hash_entry *eh;
4740
4741 eh = (struct ppc_link_hash_entry *) h;
4742 *tls_maskp = &eh->tls_mask;
4743 }
4744 }
4745 else
4746 {
4747 Elf_Internal_Sym *sym;
4748 Elf_Internal_Sym *locsyms = *locsymsp;
4749
4750 if (locsyms == NULL)
4751 {
4752 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4753 if (locsyms == NULL)
4754 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4755 symtab_hdr->sh_info,
4756 0, NULL, NULL, NULL);
4757 if (locsyms == NULL)
4758 return FALSE;
4759 *locsymsp = locsyms;
4760 }
4761 sym = locsyms + r_symndx;
4762
4763 if (hp != NULL)
4764 *hp = NULL;
4765
4766 if (symp != NULL)
4767 *symp = sym;
4768
4769 if (symsecp != NULL)
4770 {
4771 asection *symsec = NULL;
4772 if ((sym->st_shndx != SHN_UNDEF
4773 && sym->st_shndx < SHN_LORESERVE)
4774 || sym->st_shndx > SHN_HIRESERVE)
4775 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4776 *symsecp = symsec;
4777 }
4778
4779 if (tls_maskp != NULL)
4780 {
4781 struct got_entry **lgot_ents;
4782 char *tls_mask;
4783
4784 tls_mask = NULL;
4785 lgot_ents = elf_local_got_ents (ibfd);
4786 if (lgot_ents != NULL)
4787 {
4788 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4789 tls_mask = &lgot_masks[r_symndx];
4790 }
4791 *tls_maskp = tls_mask;
4792 }
4793 }
4794 return TRUE;
4795 }
4796
4797 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4798 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4799 type suitable for optimization, and 1 otherwise. */
4800
4801 static int
4802 get_tls_mask (char **tls_maskp, Elf_Internal_Sym **locsymsp,
4803 const Elf_Internal_Rela *rel, bfd *ibfd)
4804 {
4805 unsigned long r_symndx;
4806 unsigned int next_r;
4807 struct elf_link_hash_entry *h;
4808 Elf_Internal_Sym *sym;
4809 asection *sec;
4810 bfd_vma off;
4811
4812 r_symndx = ELF64_R_SYM (rel->r_info);
4813 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4814 return 0;
4815
4816 if ((*tls_maskp != NULL && **tls_maskp != 0)
4817 || sec == NULL
4818 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4819 return 1;
4820
4821 /* Look inside a TOC section too. */
4822 if (h != NULL)
4823 {
4824 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4825 off = h->root.u.def.value;
4826 }
4827 else
4828 off = sym->st_value;
4829 off += rel->r_addend;
4830 BFD_ASSERT (off % 8 == 0);
4831 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4832 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4833 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4834 return 0;
4835 if (h == NULL
4836 || h->root.type == bfd_link_hash_defined
4837 || h->root.type == bfd_link_hash_defweak)
4838 {
4839 if (next_r == (unsigned) -1)
4840 return 2;
4841 if (next_r == (unsigned) -2
4842 && (h == NULL
4843 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4844 return 3;
4845 }
4846 return 1;
4847 }
4848
4849 bfd_boolean
4850 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4851 {
4852 bfd *ibfd;
4853
4854 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4855 {
4856 asection *sec;
4857 Elf_Internal_Rela *relstart, *rel, *relend;
4858 Elf_Internal_Shdr *symtab_hdr;
4859 Elf_Internal_Sym *local_syms;
4860 struct elf_link_hash_entry **sym_hashes;
4861 bfd_vma offset;
4862 bfd_size_type amt;
4863 long *adjust;
4864 bfd_boolean need_edit;
4865
4866 sec = bfd_get_section_by_name (ibfd, ".opd");
4867 if (sec == NULL)
4868 continue;
4869
4870 amt = sec->_raw_size * sizeof (long) / 24;
4871 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4872 if (adjust == NULL)
4873 {
4874 /* Must be a ld -r link. ie. check_relocs hasn't been
4875 called. */
4876 adjust = bfd_zalloc (obfd, amt);
4877 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4878 }
4879 memset (adjust, 0, amt);
4880
4881 if (sec->output_section == bfd_abs_section_ptr)
4882 continue;
4883
4884 /* Look through the section relocs. */
4885 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4886 continue;
4887
4888 local_syms = NULL;
4889 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4890 sym_hashes = elf_sym_hashes (ibfd);
4891
4892 /* Read the relocations. */
4893 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4894 info->keep_memory);
4895 if (relstart == NULL)
4896 return FALSE;
4897
4898 /* First run through the relocs to check they are sane, and to
4899 determine whether we need to edit this opd section. */
4900 need_edit = FALSE;
4901 offset = 0;
4902 relend = relstart + sec->reloc_count;
4903 for (rel = relstart; rel < relend; )
4904 {
4905 enum elf_ppc64_reloc_type r_type;
4906 unsigned long r_symndx;
4907 asection *sym_sec;
4908 struct elf_link_hash_entry *h;
4909 Elf_Internal_Sym *sym;
4910
4911 /* .opd contains a regular array of 24 byte entries. We're
4912 only interested in the reloc pointing to a function entry
4913 point. */
4914 if (rel->r_offset != offset
4915 || rel + 1 >= relend
4916 || (rel + 1)->r_offset != offset + 8)
4917 {
4918 /* If someone messes with .opd alignment then after a
4919 "ld -r" we might have padding in the middle of .opd.
4920 Also, there's nothing to prevent someone putting
4921 something silly in .opd with the assembler. No .opd
4922 optimization for them! */
4923 (*_bfd_error_handler)
4924 (_("%s: .opd is not a regular array of opd entries"),
4925 bfd_archive_filename (ibfd));
4926 need_edit = FALSE;
4927 break;
4928 }
4929
4930 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
4931 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
4932 {
4933 (*_bfd_error_handler)
4934 (_("%s: unexpected reloc type %u in .opd section"),
4935 bfd_archive_filename (ibfd), r_type);
4936 need_edit = FALSE;
4937 break;
4938 }
4939
4940 r_symndx = ELF64_R_SYM (rel->r_info);
4941 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
4942 r_symndx, ibfd))
4943 goto error_ret;
4944
4945 if (sym_sec == NULL || sym_sec->owner == NULL)
4946 {
4947 const char *sym_name;
4948 if (h != NULL)
4949 sym_name = h->root.root.string;
4950 else
4951 sym_name = bfd_elf_local_sym_name (ibfd, sym);
4952
4953 (*_bfd_error_handler)
4954 (_("%s: undefined sym `%s' in .opd section"),
4955 bfd_archive_filename (ibfd),
4956 sym_name);
4957 need_edit = FALSE;
4958 break;
4959 }
4960
4961 /* opd entries are always for functions defined in the
4962 current input bfd. If the symbol isn't defined in the
4963 input bfd, then we won't be using the function in this
4964 bfd; It must be defined in a linkonce section in another
4965 bfd, or is weak. It's also possible that we are
4966 discarding the function due to a linker script /DISCARD/,
4967 which we test for via the output_section. */
4968 if (sym_sec->owner != ibfd
4969 || sym_sec->output_section == bfd_abs_section_ptr)
4970 need_edit = TRUE;
4971
4972 offset += 24;
4973 rel += 2;
4974 /* Allow for the possibility of a reloc on the third word. */
4975 if (rel < relend
4976 && rel->r_offset == offset - 8)
4977 rel += 1;
4978 }
4979
4980 if (need_edit)
4981 {
4982 Elf_Internal_Rela *write_rel;
4983 bfd_byte *rptr, *wptr;
4984 bfd_boolean skip;
4985
4986 /* This seems a waste of time as input .opd sections are all
4987 zeros as generated by gcc, but I suppose there's no reason
4988 this will always be so. We might start putting something in
4989 the third word of .opd entries. */
4990 if ((sec->flags & SEC_IN_MEMORY) == 0)
4991 {
4992 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
4993 if (loc == NULL
4994 || !bfd_get_section_contents (ibfd, sec, loc, 0,
4995 sec->_raw_size))
4996 {
4997 error_ret:
4998 if (local_syms != NULL
4999 && symtab_hdr->contents != (unsigned char *) local_syms)
5000 free (local_syms);
5001 if (elf_section_data (sec)->relocs != relstart)
5002 free (relstart);
5003 return FALSE;
5004 }
5005 sec->contents = loc;
5006 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5007 }
5008
5009 elf_section_data (sec)->relocs = relstart;
5010
5011 wptr = sec->contents;
5012 rptr = sec->contents;
5013 write_rel = relstart;
5014 skip = FALSE;
5015 offset = 0;
5016 for (rel = relstart; rel < relend; rel++)
5017 {
5018 unsigned long r_symndx;
5019 asection *sym_sec;
5020 struct elf_link_hash_entry *h;
5021 Elf_Internal_Sym *sym;
5022
5023 r_symndx = ELF64_R_SYM (rel->r_info);
5024 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5025 r_symndx, ibfd))
5026 goto error_ret;
5027
5028 if (rel->r_offset == offset)
5029 {
5030 struct ppc_link_hash_entry *fdh = NULL;
5031 if (h != NULL)
5032 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5033 ppc_hash_table (info));
5034
5035 skip = (sym_sec->owner != ibfd
5036 || sym_sec->output_section == bfd_abs_section_ptr);
5037 if (skip)
5038 {
5039 if (h != NULL && sym_sec->owner == ibfd)
5040 {
5041 /* Arrange for the function descriptor sym
5042 to be dropped. */
5043 fdh->elf.root.u.def.value = 0;
5044 fdh->elf.root.u.def.section = sym_sec;
5045 }
5046 }
5047 else
5048 {
5049 /* We'll be keeping this opd entry. */
5050
5051 if (h != NULL)
5052 {
5053 /* Redefine the function descriptor symbol
5054 to this location in the opd section.
5055 We've checked above that opd relocs are
5056 ordered. */
5057 fdh->elf.root.u.def.value = wptr - sec->contents;
5058 }
5059 else
5060 {
5061 /* Local syms are a bit tricky. We could
5062 tweak them as they can be cached, but
5063 we'd need to look through the local syms
5064 for the function descriptor sym which we
5065 don't have at the moment. So keep an
5066 array of adjustments. */
5067 adjust[rel->r_offset / 24] = wptr - rptr;
5068 }
5069
5070 if (wptr != rptr)
5071 memcpy (wptr, rptr, 24);
5072 wptr += 24;
5073 }
5074 rptr += 24;
5075 offset += 24;
5076 }
5077
5078 if (skip)
5079 {
5080 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5081 if (info->shared)
5082 {
5083 /* We won't be needing dynamic relocs here. */
5084 struct ppc_dyn_relocs **pp;
5085 struct ppc_dyn_relocs *p;
5086
5087 if (h != NULL)
5088 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5089 else if (sym_sec != NULL)
5090 pp = ((struct ppc_dyn_relocs **)
5091 &elf_section_data (sym_sec)->local_dynrel);
5092 else
5093 pp = ((struct ppc_dyn_relocs **)
5094 &elf_section_data (sec)->local_dynrel);
5095 while ((p = *pp) != NULL)
5096 {
5097 if (p->sec == sec)
5098 {
5099 p->count -= 1;
5100 if (p->count == 0)
5101 *pp = p->next;
5102 break;
5103 }
5104 pp = &p->next;
5105 }
5106 }
5107 }
5108 else
5109 {
5110 /* We need to adjust any reloc offsets to point to the
5111 new opd entries. While we're at it, we may as well
5112 remove redundant relocs. */
5113 rel->r_offset += wptr - rptr;
5114 if (write_rel != rel)
5115 memcpy (write_rel, rel, sizeof (*rel));
5116 ++write_rel;
5117 }
5118 }
5119
5120 sec->_cooked_size = wptr - sec->contents;
5121 sec->reloc_count = write_rel - relstart;
5122 /* Fudge the size too, as this is used later in
5123 elf_bfd_final_link if we are emitting relocs. */
5124 elf_section_data (sec)->rel_hdr.sh_size
5125 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5126 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5127 }
5128 else if (elf_section_data (sec)->relocs != relstart)
5129 free (relstart);
5130
5131 if (local_syms != NULL
5132 && symtab_hdr->contents != (unsigned char *) local_syms)
5133 {
5134 if (!info->keep_memory)
5135 free (local_syms);
5136 else
5137 symtab_hdr->contents = (unsigned char *) local_syms;
5138 }
5139 }
5140
5141 return TRUE;
5142 }
5143
5144 /* Set htab->tls_sec. */
5145
5146 bfd_boolean
5147 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5148 {
5149 asection *tls;
5150 struct ppc_link_hash_table *htab;
5151
5152 for (tls = obfd->sections; tls != NULL; tls = tls->next)
5153 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
5154 == (SEC_THREAD_LOCAL | SEC_LOAD))
5155 break;
5156
5157 htab = ppc_hash_table (info);
5158 htab->tls_sec = tls;
5159
5160 if (htab->tls_get_addr != NULL)
5161 {
5162 struct elf_link_hash_entry *h = htab->tls_get_addr;
5163
5164 while (h->root.type == bfd_link_hash_indirect
5165 || h->root.type == bfd_link_hash_warning)
5166 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5167
5168 htab->tls_get_addr = h;
5169 }
5170
5171 return tls != NULL;
5172 }
5173
5174 /* Run through all the TLS relocs looking for optimization
5175 opportunities. The linker has been hacked (see ppc64elf.em) to do
5176 a preliminary section layout so that we know the TLS segment
5177 offsets. We can't optimize earlier because some optimizations need
5178 to know the tp offset, and we need to optimize before allocating
5179 dynamic relocations. */
5180
5181 bfd_boolean
5182 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5183 {
5184 bfd *ibfd;
5185 asection *sec;
5186 struct ppc_link_hash_table *htab;
5187
5188 if (info->relocatable || info->shared)
5189 return TRUE;
5190
5191 htab = ppc_hash_table (info);
5192 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5193 {
5194 Elf_Internal_Sym *locsyms = NULL;
5195
5196 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5197 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5198 {
5199 Elf_Internal_Rela *relstart, *rel, *relend;
5200 int expecting_tls_get_addr;
5201
5202 /* Read the relocations. */
5203 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5204 info->keep_memory);
5205 if (relstart == NULL)
5206 return FALSE;
5207
5208 expecting_tls_get_addr = 0;
5209 relend = relstart + sec->reloc_count;
5210 for (rel = relstart; rel < relend; rel++)
5211 {
5212 enum elf_ppc64_reloc_type r_type;
5213 unsigned long r_symndx;
5214 struct elf_link_hash_entry *h;
5215 Elf_Internal_Sym *sym;
5216 asection *sym_sec;
5217 char *tls_mask;
5218 char tls_set, tls_clear, tls_type = 0;
5219 bfd_vma value;
5220 bfd_boolean ok_tprel, is_local;
5221
5222 r_symndx = ELF64_R_SYM (rel->r_info);
5223 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5224 r_symndx, ibfd))
5225 {
5226 err_free_rel:
5227 if (elf_section_data (sec)->relocs != relstart)
5228 free (relstart);
5229 if (locsyms != NULL
5230 && (elf_tdata (ibfd)->symtab_hdr.contents
5231 != (unsigned char *) locsyms))
5232 free (locsyms);
5233 return FALSE;
5234 }
5235
5236 if (h != NULL)
5237 {
5238 if (h->root.type != bfd_link_hash_defined
5239 && h->root.type != bfd_link_hash_defweak)
5240 continue;
5241 value = h->root.u.def.value;
5242 }
5243 else
5244 value = sym->st_value;
5245
5246 ok_tprel = FALSE;
5247 is_local = FALSE;
5248 if (h == NULL
5249 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5250 {
5251 is_local = TRUE;
5252 value += sym_sec->output_offset;
5253 value += sym_sec->output_section->vma;
5254 value -= htab->tls_sec->vma;
5255 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5256 < (bfd_vma) 1 << 32);
5257 }
5258
5259 r_type = ELF64_R_TYPE (rel->r_info);
5260 switch (r_type)
5261 {
5262 case R_PPC64_GOT_TLSLD16:
5263 case R_PPC64_GOT_TLSLD16_LO:
5264 case R_PPC64_GOT_TLSLD16_HI:
5265 case R_PPC64_GOT_TLSLD16_HA:
5266 /* These relocs should never be against a symbol
5267 defined in a shared lib. Leave them alone if
5268 that turns out to be the case. */
5269 ppc64_tlsld_got (ibfd)->refcount -= 1;
5270 if (!is_local)
5271 continue;
5272
5273 /* LD -> LE */
5274 tls_set = 0;
5275 tls_clear = TLS_LD;
5276 tls_type = TLS_TLS | TLS_LD;
5277 expecting_tls_get_addr = 1;
5278 break;
5279
5280 case R_PPC64_GOT_TLSGD16:
5281 case R_PPC64_GOT_TLSGD16_LO:
5282 case R_PPC64_GOT_TLSGD16_HI:
5283 case R_PPC64_GOT_TLSGD16_HA:
5284 if (ok_tprel)
5285 /* GD -> LE */
5286 tls_set = 0;
5287 else
5288 /* GD -> IE */
5289 tls_set = TLS_TLS | TLS_TPRELGD;
5290 tls_clear = TLS_GD;
5291 tls_type = TLS_TLS | TLS_GD;
5292 expecting_tls_get_addr = 1;
5293 break;
5294
5295 case R_PPC64_GOT_TPREL16_DS:
5296 case R_PPC64_GOT_TPREL16_LO_DS:
5297 case R_PPC64_GOT_TPREL16_HI:
5298 case R_PPC64_GOT_TPREL16_HA:
5299 expecting_tls_get_addr = 0;
5300 if (ok_tprel)
5301 {
5302 /* IE -> LE */
5303 tls_set = 0;
5304 tls_clear = TLS_TPREL;
5305 tls_type = TLS_TLS | TLS_TPREL;
5306 break;
5307 }
5308 else
5309 continue;
5310
5311 case R_PPC64_REL14:
5312 case R_PPC64_REL14_BRTAKEN:
5313 case R_PPC64_REL14_BRNTAKEN:
5314 case R_PPC64_REL24:
5315 if (h != NULL
5316 && h == htab->tls_get_addr)
5317 {
5318 if (!expecting_tls_get_addr
5319 && rel != relstart
5320 && ((ELF64_R_TYPE (rel[-1].r_info)
5321 == R_PPC64_TOC16)
5322 || (ELF64_R_TYPE (rel[-1].r_info)
5323 == R_PPC64_TOC16_LO)))
5324 {
5325 /* Check for toc tls entries. */
5326 char *toc_tls;
5327 int retval;
5328
5329 retval = get_tls_mask (&toc_tls, &locsyms,
5330 rel - 1, ibfd);
5331 if (retval == 0)
5332 goto err_free_rel;
5333 if (toc_tls != NULL)
5334 expecting_tls_get_addr = retval > 1;
5335 }
5336
5337 if (expecting_tls_get_addr)
5338 {
5339 struct plt_entry *ent;
5340 for (ent = h->plt.plist; ent; ent = ent->next)
5341 if (ent->addend == 0)
5342 {
5343 if (ent->plt.refcount > 0)
5344 ent->plt.refcount -= 1;
5345 break;
5346 }
5347 }
5348 }
5349 expecting_tls_get_addr = 0;
5350 continue;
5351
5352 case R_PPC64_TPREL64:
5353 expecting_tls_get_addr = 0;
5354 if (ok_tprel)
5355 {
5356 /* IE -> LE */
5357 tls_set = TLS_EXPLICIT;
5358 tls_clear = TLS_TPREL;
5359 break;
5360 }
5361 else
5362 continue;
5363
5364 case R_PPC64_DTPMOD64:
5365 expecting_tls_get_addr = 0;
5366 if (rel + 1 < relend
5367 && (rel[1].r_info
5368 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5369 && rel[1].r_offset == rel->r_offset + 8)
5370 {
5371 if (ok_tprel)
5372 /* GD -> LE */
5373 tls_set = TLS_EXPLICIT | TLS_GD;
5374 else
5375 /* GD -> IE */
5376 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5377 tls_clear = TLS_GD;
5378 }
5379 else
5380 {
5381 if (!is_local)
5382 continue;
5383
5384 /* LD -> LE */
5385 tls_set = TLS_EXPLICIT;
5386 tls_clear = TLS_LD;
5387 }
5388 break;
5389
5390 default:
5391 expecting_tls_get_addr = 0;
5392 continue;
5393 }
5394
5395 if ((tls_set & TLS_EXPLICIT) == 0)
5396 {
5397 struct got_entry *ent;
5398
5399 /* Adjust got entry for this reloc. */
5400 if (h != NULL)
5401 ent = h->got.glist;
5402 else
5403 ent = elf_local_got_ents (ibfd)[r_symndx];
5404
5405 for (; ent != NULL; ent = ent->next)
5406 if (ent->addend == rel->r_addend
5407 && ent->owner == ibfd
5408 && ent->tls_type == tls_type)
5409 break;
5410 if (ent == NULL)
5411 abort ();
5412
5413 if (tls_set == 0)
5414 {
5415 /* We managed to get rid of a got entry. */
5416 if (ent->got.refcount > 0)
5417 ent->got.refcount -= 1;
5418 }
5419 }
5420 else if (h != NULL)
5421 {
5422 struct ppc_link_hash_entry * eh;
5423 struct ppc_dyn_relocs **pp;
5424 struct ppc_dyn_relocs *p;
5425
5426 /* Adjust dynamic relocs. */
5427 eh = (struct ppc_link_hash_entry *) h;
5428 for (pp = &eh->dyn_relocs;
5429 (p = *pp) != NULL;
5430 pp = &p->next)
5431 if (p->sec == sec)
5432 {
5433 /* If we got rid of a DTPMOD/DTPREL reloc
5434 pair then we'll lose one or two dyn
5435 relocs. */
5436 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5437 p->count -= 1;
5438 p->count -= 1;
5439 if (p->count == 0)
5440 *pp = p->next;
5441 break;
5442 }
5443 }
5444
5445 *tls_mask |= tls_set;
5446 *tls_mask &= ~tls_clear;
5447 }
5448
5449 if (elf_section_data (sec)->relocs != relstart)
5450 free (relstart);
5451 }
5452
5453 if (locsyms != NULL
5454 && (elf_tdata (ibfd)->symtab_hdr.contents
5455 != (unsigned char *) locsyms))
5456 {
5457 if (!info->keep_memory)
5458 free (locsyms);
5459 else
5460 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5461 }
5462 }
5463 return TRUE;
5464 }
5465
5466 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5467 will be called from elflink.h. If elflink.h doesn't call our
5468 finish_dynamic_symbol routine, we'll need to do something about
5469 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5470 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5471 ((DYN) \
5472 && ((SHARED) \
5473 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5474 && ((H)->dynindx != -1 \
5475 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5476
5477 /* Allocate space in .plt, .got and associated reloc sections for
5478 dynamic relocs. */
5479
5480 static bfd_boolean
5481 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5482 {
5483 struct bfd_link_info *info;
5484 struct ppc_link_hash_table *htab;
5485 asection *s;
5486 struct ppc_link_hash_entry *eh;
5487 struct ppc_dyn_relocs *p;
5488 struct got_entry *gent;
5489
5490 if (h->root.type == bfd_link_hash_indirect)
5491 return TRUE;
5492
5493 if (h->root.type == bfd_link_hash_warning)
5494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5495
5496 info = (struct bfd_link_info *) inf;
5497 htab = ppc_hash_table (info);
5498
5499 if (htab->elf.dynamic_sections_created
5500 && h->dynindx != -1
5501 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5502 {
5503 struct plt_entry *pent;
5504 bfd_boolean doneone = FALSE;
5505 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5506 if (pent->plt.refcount > 0)
5507 {
5508 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5509
5510 /* If this is the first .plt entry, make room for the special
5511 first entry. */
5512 s = htab->plt;
5513 if (s->_raw_size == 0)
5514 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5515
5516 pent->plt.offset = s->_raw_size;
5517
5518 /* Make room for this entry. */
5519 s->_raw_size += PLT_ENTRY_SIZE;
5520
5521 /* Make room for the .glink code. */
5522 s = htab->glink;
5523 if (s->_raw_size == 0)
5524 s->_raw_size += GLINK_CALL_STUB_SIZE;
5525 /* We need bigger stubs past index 32767. */
5526 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5527 s->_raw_size += 4;
5528 s->_raw_size += 2*4;
5529
5530 /* We also need to make an entry in the .rela.plt section. */
5531 s = htab->relplt;
5532 s->_raw_size += sizeof (Elf64_External_Rela);
5533 doneone = TRUE;
5534 }
5535 else
5536 pent->plt.offset = (bfd_vma) -1;
5537 if (!doneone)
5538 {
5539 h->plt.plist = NULL;
5540 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5541 }
5542 }
5543 else
5544 {
5545 h->plt.plist = NULL;
5546 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5547 }
5548
5549 eh = (struct ppc_link_hash_entry *) h;
5550 /* Run through the TLS GD got entries first if we're changing them
5551 to TPREL. */
5552 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5553 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5554 if (gent->got.refcount > 0
5555 && (gent->tls_type & TLS_GD) != 0)
5556 {
5557 /* This was a GD entry that has been converted to TPREL. If
5558 there happens to be a TPREL entry we can use that one. */
5559 struct got_entry *ent;
5560 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5561 if (ent->got.refcount > 0
5562 && (ent->tls_type & TLS_TPREL) != 0
5563 && ent->addend == gent->addend
5564 && ent->owner == gent->owner)
5565 {
5566 gent->got.refcount = 0;
5567 break;
5568 }
5569
5570 /* If not, then we'll be using our own TPREL entry. */
5571 if (gent->got.refcount != 0)
5572 gent->tls_type = TLS_TLS | TLS_TPREL;
5573 }
5574
5575 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5576 if (gent->got.refcount > 0)
5577 {
5578 bfd_boolean dyn;
5579
5580 /* Make sure this symbol is output as a dynamic symbol.
5581 Undefined weak syms won't yet be marked as dynamic,
5582 nor will all TLS symbols. */
5583 if (h->dynindx == -1
5584 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5585 {
5586 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5587 return FALSE;
5588 }
5589
5590 if ((gent->tls_type & TLS_LD) != 0
5591 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5592 {
5593 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5594 continue;
5595 }
5596
5597 s = ppc64_elf_tdata (gent->owner)->got;
5598 gent->got.offset = s->_raw_size;
5599 s->_raw_size
5600 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5601 dyn = htab->elf.dynamic_sections_created;
5602 if ((info->shared
5603 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5604 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5605 || h->root.type != bfd_link_hash_undefweak))
5606 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5607 += (gent->tls_type & eh->tls_mask & TLS_GD
5608 ? 2 * sizeof (Elf64_External_Rela)
5609 : sizeof (Elf64_External_Rela));
5610 }
5611 else
5612 gent->got.offset = (bfd_vma) -1;
5613
5614 if (eh->dyn_relocs == NULL)
5615 return TRUE;
5616
5617 /* In the shared -Bsymbolic case, discard space allocated for
5618 dynamic pc-relative relocs against symbols which turn out to be
5619 defined in regular objects. For the normal shared case, discard
5620 space for relocs that have become local due to symbol visibility
5621 changes. */
5622
5623 if (info->shared)
5624 {
5625 /* Relocs that use pc_count are those that appear on a call insn,
5626 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5627 generated via assembly. We want calls to protected symbols to
5628 resolve directly to the function rather than going via the plt.
5629 If people want function pointer comparisons to work as expected
5630 then they should avoid writing weird assembly. */
5631 if (SYMBOL_CALLS_LOCAL (info, h))
5632 {
5633 struct ppc_dyn_relocs **pp;
5634
5635 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5636 {
5637 p->count -= p->pc_count;
5638 p->pc_count = 0;
5639 if (p->count == 0)
5640 *pp = p->next;
5641 else
5642 pp = &p->next;
5643 }
5644 }
5645
5646 /* Also discard relocs on undefined weak syms with non-default
5647 visibility. */
5648 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5649 && h->root.type == bfd_link_hash_undefweak)
5650 eh->dyn_relocs = NULL;
5651 }
5652 else if (ELIMINATE_COPY_RELOCS)
5653 {
5654 /* For the non-shared case, discard space for relocs against
5655 symbols which turn out to need copy relocs or are not
5656 dynamic. */
5657
5658 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5659 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5660 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5661 {
5662 /* Make sure this symbol is output as a dynamic symbol.
5663 Undefined weak syms won't yet be marked as dynamic. */
5664 if (h->dynindx == -1
5665 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5666 {
5667 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5668 return FALSE;
5669 }
5670
5671 /* If that succeeded, we know we'll be keeping all the
5672 relocs. */
5673 if (h->dynindx != -1)
5674 goto keep;
5675 }
5676
5677 eh->dyn_relocs = NULL;
5678
5679 keep: ;
5680 }
5681
5682 /* Finally, allocate space. */
5683 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5684 {
5685 asection *sreloc = elf_section_data (p->sec)->sreloc;
5686 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5687 }
5688
5689 return TRUE;
5690 }
5691
5692 /* Find any dynamic relocs that apply to read-only sections. */
5693
5694 static bfd_boolean
5695 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5696 {
5697 struct ppc_link_hash_entry *eh;
5698 struct ppc_dyn_relocs *p;
5699
5700 if (h->root.type == bfd_link_hash_warning)
5701 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5702
5703 eh = (struct ppc_link_hash_entry *) h;
5704 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5705 {
5706 asection *s = p->sec->output_section;
5707
5708 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5709 {
5710 struct bfd_link_info *info = inf;
5711
5712 info->flags |= DF_TEXTREL;
5713
5714 /* Not an error, just cut short the traversal. */
5715 return FALSE;
5716 }
5717 }
5718 return TRUE;
5719 }
5720
5721 /* Set the sizes of the dynamic sections. */
5722
5723 static bfd_boolean
5724 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5725 struct bfd_link_info *info)
5726 {
5727 struct ppc_link_hash_table *htab;
5728 bfd *dynobj;
5729 asection *s;
5730 bfd_boolean relocs;
5731 bfd *ibfd;
5732
5733 htab = ppc_hash_table (info);
5734 dynobj = htab->elf.dynobj;
5735 if (dynobj == NULL)
5736 abort ();
5737
5738 if (htab->elf.dynamic_sections_created)
5739 {
5740 /* Set the contents of the .interp section to the interpreter. */
5741 if (info->executable)
5742 {
5743 s = bfd_get_section_by_name (dynobj, ".interp");
5744 if (s == NULL)
5745 abort ();
5746 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5747 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5748 }
5749 }
5750
5751 /* Set up .got offsets for local syms, and space for local dynamic
5752 relocs. */
5753 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5754 {
5755 struct got_entry **lgot_ents;
5756 struct got_entry **end_lgot_ents;
5757 char *lgot_masks;
5758 bfd_size_type locsymcount;
5759 Elf_Internal_Shdr *symtab_hdr;
5760 asection *srel;
5761
5762 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5763 continue;
5764
5765 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5766 {
5767 s = ppc64_elf_tdata (ibfd)->got;
5768 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5769 s->_raw_size += 16;
5770 if (info->shared)
5771 {
5772 srel = ppc64_elf_tdata (ibfd)->relgot;
5773 srel->_raw_size += sizeof (Elf64_External_Rela);
5774 }
5775 }
5776 else
5777 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5778
5779 for (s = ibfd->sections; s != NULL; s = s->next)
5780 {
5781 struct ppc_dyn_relocs *p;
5782
5783 for (p = *((struct ppc_dyn_relocs **)
5784 &elf_section_data (s)->local_dynrel);
5785 p != NULL;
5786 p = p->next)
5787 {
5788 if (!bfd_is_abs_section (p->sec)
5789 && bfd_is_abs_section (p->sec->output_section))
5790 {
5791 /* Input section has been discarded, either because
5792 it is a copy of a linkonce section or due to
5793 linker script /DISCARD/, so we'll be discarding
5794 the relocs too. */
5795 }
5796 else if (p->count != 0)
5797 {
5798 srel = elf_section_data (p->sec)->sreloc;
5799 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5800 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5801 info->flags |= DF_TEXTREL;
5802 }
5803 }
5804 }
5805
5806 lgot_ents = elf_local_got_ents (ibfd);
5807 if (!lgot_ents)
5808 continue;
5809
5810 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5811 locsymcount = symtab_hdr->sh_info;
5812 end_lgot_ents = lgot_ents + locsymcount;
5813 lgot_masks = (char *) end_lgot_ents;
5814 s = ppc64_elf_tdata (ibfd)->got;
5815 srel = ppc64_elf_tdata (ibfd)->relgot;
5816 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5817 {
5818 struct got_entry *ent;
5819
5820 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5821 if (ent->got.refcount > 0)
5822 {
5823 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5824 {
5825 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5826 {
5827 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5828 s->_raw_size += 16;
5829 if (info->shared)
5830 srel->_raw_size += sizeof (Elf64_External_Rela);
5831 }
5832 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5833 }
5834 else
5835 {
5836 ent->got.offset = s->_raw_size;
5837 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5838 {
5839 s->_raw_size += 16;
5840 if (info->shared)
5841 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5842 }
5843 else
5844 {
5845 s->_raw_size += 8;
5846 if (info->shared)
5847 srel->_raw_size += sizeof (Elf64_External_Rela);
5848 }
5849 }
5850 }
5851 else
5852 ent->got.offset = (bfd_vma) -1;
5853 }
5854 }
5855
5856 /* Allocate global sym .plt and .got entries, and space for global
5857 sym dynamic relocs. */
5858 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5859
5860 /* We now have determined the sizes of the various dynamic sections.
5861 Allocate memory for them. */
5862 relocs = FALSE;
5863 for (s = dynobj->sections; s != NULL; s = s->next)
5864 {
5865 if ((s->flags & SEC_LINKER_CREATED) == 0)
5866 continue;
5867
5868 /* Reset _cooked_size since prelim layout will set it wrongly,
5869 and a non-zero _cooked_size sticks. */
5870 s->_cooked_size = 0;
5871
5872 if (s == htab->brlt || s == htab->relbrlt)
5873 /* These haven't been allocated yet; don't strip. */
5874 continue;
5875 else if (s == htab->got
5876 || s == htab->plt
5877 || s == htab->glink)
5878 {
5879 /* Strip this section if we don't need it; see the
5880 comment below. */
5881 }
5882 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5883 {
5884 if (s->_raw_size == 0)
5885 {
5886 /* If we don't need this section, strip it from the
5887 output file. This is mostly to handle .rela.bss and
5888 .rela.plt. We must create both sections in
5889 create_dynamic_sections, because they must be created
5890 before the linker maps input sections to output
5891 sections. The linker does that before
5892 adjust_dynamic_symbol is called, and it is that
5893 function which decides whether anything needs to go
5894 into these sections. */
5895 }
5896 else
5897 {
5898 if (s != htab->relplt)
5899 relocs = TRUE;
5900
5901 /* We use the reloc_count field as a counter if we need
5902 to copy relocs into the output file. */
5903 s->reloc_count = 0;
5904 }
5905 }
5906 else
5907 {
5908 /* It's not one of our sections, so don't allocate space. */
5909 continue;
5910 }
5911
5912 if (s->_raw_size == 0)
5913 {
5914 _bfd_strip_section_from_output (info, s);
5915 continue;
5916 }
5917
5918 /* .plt is in the bss section. We don't initialise it. */
5919 if ((s->flags & SEC_LOAD) == 0)
5920 continue;
5921
5922 /* Allocate memory for the section contents. We use bfd_zalloc
5923 here in case unused entries are not reclaimed before the
5924 section's contents are written out. This should not happen,
5925 but this way if it does we get a R_PPC64_NONE reloc in .rela
5926 sections instead of garbage.
5927 We also rely on the section contents being zero when writing
5928 the GOT. */
5929 s->contents = bfd_zalloc (dynobj, s->_raw_size);
5930 if (s->contents == NULL)
5931 return FALSE;
5932 }
5933
5934 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5935 {
5936 s = ppc64_elf_tdata (ibfd)->got;
5937 if (s != NULL && s != htab->got)
5938 {
5939 s->_cooked_size = 0;
5940 if (s->_raw_size == 0)
5941 _bfd_strip_section_from_output (info, s);
5942 else
5943 {
5944 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5945 if (s->contents == NULL)
5946 return FALSE;
5947 }
5948 }
5949 s = ppc64_elf_tdata (ibfd)->relgot;
5950 if (s != NULL)
5951 {
5952 s->_cooked_size = 0;
5953 if (s->_raw_size == 0)
5954 _bfd_strip_section_from_output (info, s);
5955 else
5956 {
5957 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5958 if (s->contents == NULL)
5959 return FALSE;
5960 relocs = TRUE;
5961 s->reloc_count = 0;
5962 }
5963 }
5964 }
5965
5966 if (htab->elf.dynamic_sections_created)
5967 {
5968 /* Add some entries to the .dynamic section. We fill in the
5969 values later, in ppc64_elf_finish_dynamic_sections, but we
5970 must add the entries now so that we get the correct size for
5971 the .dynamic section. The DT_DEBUG entry is filled in by the
5972 dynamic linker and used by the debugger. */
5973 #define add_dynamic_entry(TAG, VAL) \
5974 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
5975
5976 if (info->executable)
5977 {
5978 if (!add_dynamic_entry (DT_DEBUG, 0))
5979 return FALSE;
5980 }
5981
5982 if (htab->plt != NULL && htab->plt->_raw_size != 0)
5983 {
5984 if (!add_dynamic_entry (DT_PLTGOT, 0)
5985 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5986 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5987 || !add_dynamic_entry (DT_JMPREL, 0)
5988 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
5989 return FALSE;
5990 }
5991
5992 if (NO_OPD_RELOCS)
5993 {
5994 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
5995 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
5996 return FALSE;
5997 }
5998
5999 if (relocs)
6000 {
6001 if (!add_dynamic_entry (DT_RELA, 0)
6002 || !add_dynamic_entry (DT_RELASZ, 0)
6003 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6004 return FALSE;
6005
6006 /* If any dynamic relocs apply to a read-only section,
6007 then we need a DT_TEXTREL entry. */
6008 if ((info->flags & DF_TEXTREL) == 0)
6009 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6010
6011 if ((info->flags & DF_TEXTREL) != 0)
6012 {
6013 if (!add_dynamic_entry (DT_TEXTREL, 0))
6014 return FALSE;
6015 }
6016 }
6017 }
6018 #undef add_dynamic_entry
6019
6020 return TRUE;
6021 }
6022
6023 /* Determine the type of stub needed, if any, for a call. */
6024
6025 static inline enum ppc_stub_type
6026 ppc_type_of_stub (asection *input_sec,
6027 const Elf_Internal_Rela *rel,
6028 struct ppc_link_hash_entry **hash,
6029 bfd_vma destination)
6030 {
6031 struct ppc_link_hash_entry *h = *hash;
6032 bfd_vma location;
6033 bfd_vma branch_offset;
6034 bfd_vma max_branch_offset;
6035 enum elf_ppc64_reloc_type r_type;
6036
6037 if (h != NULL)
6038 {
6039 if (h->oh != NULL
6040 && h->oh->dynindx != -1)
6041 {
6042 struct plt_entry *ent;
6043 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6044 if (ent->addend == rel->r_addend
6045 && ent->plt.offset != (bfd_vma) -1)
6046 {
6047 *hash = (struct ppc_link_hash_entry *) h->oh;
6048 return ppc_stub_plt_call;
6049 }
6050 }
6051
6052 if (h->elf.root.type != bfd_link_hash_defined
6053 && h->elf.root.type != bfd_link_hash_defweak)
6054 return ppc_stub_none;
6055 }
6056
6057 /* Determine where the call point is. */
6058 location = (input_sec->output_offset
6059 + input_sec->output_section->vma
6060 + rel->r_offset);
6061
6062 branch_offset = destination - location;
6063 r_type = ELF64_R_TYPE (rel->r_info);
6064
6065 /* Determine if a long branch stub is needed. */
6066 max_branch_offset = 1 << 25;
6067 if (r_type != R_PPC64_REL24)
6068 max_branch_offset = 1 << 15;
6069
6070 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6071 /* We need a stub. Figure out whether a long_branch or plt_branch
6072 is needed later. */
6073 return ppc_stub_long_branch;
6074
6075 return ppc_stub_none;
6076 }
6077
6078 /* Build a .plt call stub. */
6079
6080 static inline bfd_byte *
6081 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6082 {
6083 #define PPC_LO(v) ((v) & 0xffff)
6084 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6085 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6086
6087 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6088 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6089 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6090 if (PPC_HA (offset + 8) != PPC_HA (offset))
6091 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6092 offset += 8;
6093 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6094 if (PPC_HA (offset + 8) != PPC_HA (offset))
6095 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6096 offset += 8;
6097 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6098 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6099 bfd_put_32 (obfd, BCTR, p), p += 4;
6100 return p;
6101 }
6102
6103 static bfd_boolean
6104 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6105 {
6106 struct ppc_stub_hash_entry *stub_entry;
6107 struct ppc_branch_hash_entry *br_entry;
6108 struct bfd_link_info *info;
6109 struct ppc_link_hash_table *htab;
6110 bfd_byte *loc;
6111 bfd_byte *p;
6112 unsigned int indx;
6113 struct plt_entry *ent;
6114 bfd_vma off;
6115 int size;
6116
6117 /* Massage our args to the form they really have. */
6118 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6119 info = in_arg;
6120
6121 htab = ppc_hash_table (info);
6122
6123 /* Make a note of the offset within the stubs for this entry. */
6124 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6125 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6126
6127 htab->stub_count[stub_entry->stub_type - 1] += 1;
6128 switch (stub_entry->stub_type)
6129 {
6130 case ppc_stub_long_branch:
6131 case ppc_stub_long_branch_r2off:
6132 /* Branches are relative. This is where we are going to. */
6133 off = (stub_entry->target_value
6134 + stub_entry->target_section->output_offset
6135 + stub_entry->target_section->output_section->vma);
6136
6137 /* And this is where we are coming from. */
6138 off -= (stub_entry->stub_offset
6139 + stub_entry->stub_sec->output_offset
6140 + stub_entry->stub_sec->output_section->vma);
6141
6142 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6143 size = 4;
6144 else
6145 {
6146 bfd_vma r2off;
6147
6148 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6149 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6150 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6151 loc += 4;
6152 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6153 loc += 4;
6154 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6155 loc += 4;
6156 off -= 12;
6157 size = 16;
6158 }
6159 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6160
6161 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6162 break;
6163
6164 case ppc_stub_plt_branch:
6165 case ppc_stub_plt_branch_r2off:
6166 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6167 stub_entry->root.string + 9,
6168 FALSE, FALSE);
6169 if (br_entry == NULL)
6170 {
6171 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6172 stub_entry->root.string + 9);
6173 htab->stub_error = TRUE;
6174 return FALSE;
6175 }
6176
6177 off = (stub_entry->target_value
6178 + stub_entry->target_section->output_offset
6179 + stub_entry->target_section->output_section->vma);
6180
6181 bfd_put_64 (htab->brlt->owner, off,
6182 htab->brlt->contents + br_entry->offset);
6183
6184 if (info->shared)
6185 {
6186 /* Create a reloc for the branch lookup table entry. */
6187 Elf_Internal_Rela rela;
6188 bfd_byte *rl;
6189
6190 rela.r_offset = (br_entry->offset
6191 + htab->brlt->output_offset
6192 + htab->brlt->output_section->vma);
6193 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6194 rela.r_addend = off;
6195
6196 rl = htab->relbrlt->contents;
6197 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6198 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6199 }
6200
6201 off = (br_entry->offset
6202 + htab->brlt->output_offset
6203 + htab->brlt->output_section->vma
6204 - elf_gp (htab->brlt->output_section->owner)
6205 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6206
6207 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6208 {
6209 (*_bfd_error_handler)
6210 (_("linkage table error against `%s'"),
6211 stub_entry->root.string);
6212 bfd_set_error (bfd_error_bad_value);
6213 htab->stub_error = TRUE;
6214 return FALSE;
6215 }
6216
6217 indx = off;
6218 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6219 {
6220 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6221 loc += 4;
6222 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6223 size = 16;
6224 }
6225 else
6226 {
6227 bfd_vma r2off;
6228
6229 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6230 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6231 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6232 loc += 4;
6233 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6234 loc += 4;
6235 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6236 loc += 4;
6237 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6238 loc += 4;
6239 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6240 size = 28;
6241 }
6242 loc += 4;
6243 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6244 loc += 4;
6245 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6246 break;
6247
6248 case ppc_stub_plt_call:
6249 /* Do the best we can for shared libraries built without
6250 exporting ".foo" for each "foo". This can happen when symbol
6251 versioning scripts strip all bar a subset of symbols. */
6252 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6253 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6254 {
6255 /* Point the symbol at the stub. There may be multiple stubs,
6256 we don't really care; The main thing is to make this sym
6257 defined somewhere. Maybe defining the symbol in the stub
6258 section is a silly idea. If we didn't do this, htab->top_id
6259 could disappear. */
6260 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6261 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6262 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6263 }
6264
6265 /* Now build the stub. */
6266 off = (bfd_vma) -1;
6267 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6268 if (ent->addend == stub_entry->addend)
6269 {
6270 off = ent->plt.offset;
6271 break;
6272 }
6273 if (off >= (bfd_vma) -2)
6274 abort ();
6275
6276 off &= ~ (bfd_vma) 1;
6277 off += (htab->plt->output_offset
6278 + htab->plt->output_section->vma
6279 - elf_gp (htab->plt->output_section->owner)
6280 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6281
6282 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6283 {
6284 (*_bfd_error_handler)
6285 (_("linkage table error against `%s'"),
6286 stub_entry->h->elf.root.root.string);
6287 bfd_set_error (bfd_error_bad_value);
6288 htab->stub_error = TRUE;
6289 return FALSE;
6290 }
6291
6292 p = build_plt_stub (htab->stub_bfd, loc, off);
6293 size = p - loc;
6294 break;
6295
6296 default:
6297 BFD_FAIL ();
6298 return FALSE;
6299 }
6300
6301 stub_entry->stub_sec->_cooked_size += size;
6302
6303 if (htab->emit_stub_syms
6304 && !(stub_entry->stub_type == ppc_stub_plt_call
6305 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6306 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6307 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6308 {
6309 struct elf_link_hash_entry *h;
6310 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6311 TRUE, FALSE, FALSE);
6312 if (h == NULL)
6313 return FALSE;
6314 if (h->root.type == bfd_link_hash_new)
6315 {
6316 h->root.type = bfd_link_hash_defined;
6317 h->root.u.def.section = stub_entry->stub_sec;
6318 h->root.u.def.value = stub_entry->stub_offset;
6319 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6320 | ELF_LINK_HASH_DEF_REGULAR
6321 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6322 | ELF_LINK_FORCED_LOCAL);
6323 }
6324 }
6325
6326 return TRUE;
6327 }
6328
6329 /* As above, but don't actually build the stub. Just bump offset so
6330 we know stub section sizes, and select plt_branch stubs where
6331 long_branch stubs won't do. */
6332
6333 static bfd_boolean
6334 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6335 {
6336 struct ppc_stub_hash_entry *stub_entry;
6337 struct ppc_link_hash_table *htab;
6338 bfd_vma off;
6339 int size;
6340
6341 /* Massage our args to the form they really have. */
6342 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6343 htab = in_arg;
6344
6345 if (stub_entry->stub_type == ppc_stub_plt_call)
6346 {
6347 struct plt_entry *ent;
6348 off = (bfd_vma) -1;
6349 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6350 if (ent->addend == stub_entry->addend)
6351 {
6352 off = ent->plt.offset & ~(bfd_vma) 1;
6353 break;
6354 }
6355 if (off >= (bfd_vma) -2)
6356 abort ();
6357 off += (htab->plt->output_offset
6358 + htab->plt->output_section->vma
6359 - elf_gp (htab->plt->output_section->owner)
6360 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6361
6362 size = PLT_CALL_STUB_SIZE;
6363 if (PPC_HA (off + 16) != PPC_HA (off))
6364 size += 4;
6365 }
6366 else
6367 {
6368 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6369 variants. */
6370 off = (stub_entry->target_value
6371 + stub_entry->target_section->output_offset
6372 + stub_entry->target_section->output_section->vma);
6373 off -= (stub_entry->stub_sec->_raw_size
6374 + stub_entry->stub_sec->output_offset
6375 + stub_entry->stub_sec->output_section->vma);
6376
6377 /* Reset the stub type from the plt variant in case we now
6378 can reach with a shorter stub. */
6379 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6380 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6381
6382 size = 4;
6383 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6384 {
6385 off -= 12;
6386 size = 16;
6387 }
6388
6389 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6390 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6391 {
6392 struct ppc_branch_hash_entry *br_entry;
6393
6394 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6395 stub_entry->root.string + 9,
6396 TRUE, FALSE);
6397 if (br_entry == NULL)
6398 {
6399 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6400 stub_entry->root.string + 9);
6401 htab->stub_error = TRUE;
6402 return FALSE;
6403 }
6404
6405 if (br_entry->iter != htab->stub_iteration)
6406 {
6407 br_entry->iter = htab->stub_iteration;
6408 br_entry->offset = htab->brlt->_raw_size;
6409 htab->brlt->_raw_size += 8;
6410 }
6411
6412 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6413 size = 16;
6414 if (stub_entry->stub_type != ppc_stub_plt_branch)
6415 size = 28;
6416 }
6417 }
6418
6419 stub_entry->stub_sec->_raw_size += size;
6420 return TRUE;
6421 }
6422
6423 /* Set up various things so that we can make a list of input sections
6424 for each output section included in the link. Returns -1 on error,
6425 0 when no stubs will be needed, and 1 on success. */
6426
6427 int
6428 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6429 {
6430 bfd *input_bfd;
6431 int top_id, top_index, id;
6432 asection *section;
6433 asection **input_list;
6434 bfd_size_type amt;
6435 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6436
6437 if (htab->brlt == NULL)
6438 return 0;
6439
6440 /* Find the top input section id. */
6441 for (input_bfd = info->input_bfds, top_id = 3;
6442 input_bfd != NULL;
6443 input_bfd = input_bfd->link_next)
6444 {
6445 for (section = input_bfd->sections;
6446 section != NULL;
6447 section = section->next)
6448 {
6449 if (top_id < section->id)
6450 top_id = section->id;
6451 }
6452 }
6453
6454 htab->top_id = top_id;
6455 amt = sizeof (struct map_stub) * (top_id + 1);
6456 htab->stub_group = bfd_zmalloc (amt);
6457 if (htab->stub_group == NULL)
6458 return -1;
6459
6460 /* Set toc_off for com, und, abs and ind sections. */
6461 for (id = 0; id < 3; id++)
6462 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6463
6464 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6465
6466 /* We can't use output_bfd->section_count here to find the top output
6467 section index as some sections may have been removed, and
6468 _bfd_strip_section_from_output doesn't renumber the indices. */
6469 for (section = output_bfd->sections, top_index = 0;
6470 section != NULL;
6471 section = section->next)
6472 {
6473 if (top_index < section->index)
6474 top_index = section->index;
6475 }
6476
6477 htab->top_index = top_index;
6478 amt = sizeof (asection *) * (top_index + 1);
6479 input_list = bfd_zmalloc (amt);
6480 htab->input_list = input_list;
6481 if (input_list == NULL)
6482 return -1;
6483
6484 return 1;
6485 }
6486
6487 /* The linker repeatedly calls this function for each TOC input section
6488 and linker generated GOT section. Group input bfds such that the toc
6489 within a group is less than 64k in size. Will break with cute linker
6490 scripts that play games with dot in the output toc section. */
6491
6492 void
6493 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6494 {
6495 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6496
6497 if (!htab->no_multi_toc)
6498 {
6499 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6500 bfd_vma off = addr - htab->toc_curr;
6501 if (off + isec->_raw_size > 0x10000)
6502 {
6503 htab->toc_curr = addr;
6504 htab->multi_toc_needed = 1;
6505 }
6506 elf_gp (isec->owner) = (htab->toc_curr
6507 - elf_gp (isec->output_section->owner)
6508 + TOC_BASE_OFF);
6509 }
6510 }
6511
6512 /* Called after the last call to the above function. */
6513
6514 void
6515 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6516 struct bfd_link_info *info)
6517 {
6518 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6519
6520 /* toc_curr tracks the TOC offset used for code sections below in
6521 ppc64_elf_next_input_section. Start off at 0x8000. */
6522 htab->toc_curr = TOC_BASE_OFF;
6523 }
6524
6525 /* No toc references were found in ISEC. If the code in ISEC makes no
6526 calls, then there's no need to use toc adjusting stubs when branching
6527 into ISEC. Actually, indirect calls from ISEC are OK as they will
6528 load r2. */
6529
6530 static int
6531 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6532 {
6533 bfd_byte *contents;
6534 bfd_size_type i;
6535 int ret;
6536 int branch_ok;
6537
6538 /* We know none of our code bearing sections will need toc stubs. */
6539 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6540 return 0;
6541
6542 /* Hack for linux kernel. .fixup contains branches, but only back to
6543 the function that hit an exception. */
6544 branch_ok = strcmp (isec->name, ".fixup") == 0;
6545
6546 contents = elf_section_data (isec)->this_hdr.contents;
6547 if (contents == NULL)
6548 {
6549 contents = bfd_malloc (isec->_raw_size);
6550 if (contents == NULL)
6551 return -1;
6552 if (! bfd_get_section_contents (isec->owner, isec, contents,
6553 0, isec->_raw_size))
6554 {
6555 free (contents);
6556 return -1;
6557 }
6558 if (info->keep_memory)
6559 elf_section_data (isec)->this_hdr.contents = contents;
6560 }
6561
6562 /* Code scan, because we don't necessarily have relocs on calls to
6563 static functions. */
6564 ret = 0;
6565 for (i = 0; i < isec->_raw_size; i += 4)
6566 {
6567 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6568 /* Is this a branch? */
6569 if ((insn & (0x3f << 26)) == (18 << 26)
6570 /* If branch and link, it's a function call. */
6571 && ((insn & 1) != 0
6572 /* Sibling calls use a plain branch. I don't know a way
6573 of deciding whether a branch is really a sibling call. */
6574 || !branch_ok))
6575 {
6576 ret = 1;
6577 break;
6578 }
6579 }
6580
6581 if (elf_section_data (isec)->this_hdr.contents != contents)
6582 free (contents);
6583 return ret;
6584 }
6585
6586 /* The linker repeatedly calls this function for each input section,
6587 in the order that input sections are linked into output sections.
6588 Build lists of input sections to determine groupings between which
6589 we may insert linker stubs. */
6590
6591 bfd_boolean
6592 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6593 {
6594 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6595 int ret;
6596
6597 if ((isec->output_section->flags & SEC_CODE) != 0
6598 && isec->output_section->index <= htab->top_index)
6599 {
6600 asection **list = htab->input_list + isec->output_section->index;
6601 /* Steal the link_sec pointer for our list. */
6602 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6603 /* This happens to make the list in reverse order,
6604 which is what we want. */
6605 PREV_SEC (isec) = *list;
6606 *list = isec;
6607 }
6608
6609 /* If a code section has a function that uses the TOC then we need
6610 to use the right TOC (obviously). Also, make sure that .opd gets
6611 the correct TOC value. */
6612 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6613 {
6614 if (elf_gp (isec->owner) != 0)
6615 htab->toc_curr = elf_gp (isec->owner);
6616 }
6617 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6618 return FALSE;
6619 else
6620 isec->has_gp_reloc = ret;
6621
6622 /* Functions that don't use the TOC can belong in any TOC group.
6623 Use the last TOC base. This happens to make _init and _fini
6624 pasting work. */
6625 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6626 return TRUE;
6627 }
6628
6629 /* See whether we can group stub sections together. Grouping stub
6630 sections may result in fewer stubs. More importantly, we need to
6631 put all .init* and .fini* stubs at the beginning of the .init or
6632 .fini output sections respectively, because glibc splits the
6633 _init and _fini functions into multiple parts. Putting a stub in
6634 the middle of a function is not a good idea. */
6635
6636 static void
6637 group_sections (struct ppc_link_hash_table *htab,
6638 bfd_size_type stub_group_size,
6639 bfd_boolean stubs_always_before_branch)
6640 {
6641 asection **list = htab->input_list + htab->top_index;
6642 do
6643 {
6644 asection *tail = *list;
6645 while (tail != NULL)
6646 {
6647 asection *curr;
6648 asection *prev;
6649 bfd_size_type total;
6650 bfd_boolean big_sec;
6651 bfd_vma curr_toc;
6652
6653 curr = tail;
6654 if (tail->_cooked_size)
6655 total = tail->_cooked_size;
6656 else
6657 total = tail->_raw_size;
6658 big_sec = total >= stub_group_size;
6659 curr_toc = htab->stub_group[tail->id].toc_off;
6660
6661 while ((prev = PREV_SEC (curr)) != NULL
6662 && ((total += curr->output_offset - prev->output_offset)
6663 < stub_group_size)
6664 && htab->stub_group[prev->id].toc_off == curr_toc)
6665 curr = prev;
6666
6667 /* OK, the size from the start of CURR to the end is less
6668 than stub_group_size and thus can be handled by one stub
6669 section. (or the tail section is itself larger than
6670 stub_group_size, in which case we may be toast.) We
6671 should really be keeping track of the total size of stubs
6672 added here, as stubs contribute to the final output
6673 section size. That's a little tricky, and this way will
6674 only break if stubs added make the total size more than
6675 2^25, ie. for the default stub_group_size, if stubs total
6676 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6677 do
6678 {
6679 prev = PREV_SEC (tail);
6680 /* Set up this stub group. */
6681 htab->stub_group[tail->id].link_sec = curr;
6682 }
6683 while (tail != curr && (tail = prev) != NULL);
6684
6685 /* But wait, there's more! Input sections up to stub_group_size
6686 bytes before the stub section can be handled by it too.
6687 Don't do this if we have a really large section after the
6688 stubs, as adding more stubs increases the chance that
6689 branches may not reach into the stub section. */
6690 if (!stubs_always_before_branch && !big_sec)
6691 {
6692 total = 0;
6693 while (prev != NULL
6694 && ((total += tail->output_offset - prev->output_offset)
6695 < stub_group_size)
6696 && htab->stub_group[prev->id].toc_off == curr_toc)
6697 {
6698 tail = prev;
6699 prev = PREV_SEC (tail);
6700 htab->stub_group[tail->id].link_sec = curr;
6701 }
6702 }
6703 tail = prev;
6704 }
6705 }
6706 while (list-- != htab->input_list);
6707 free (htab->input_list);
6708 #undef PREV_SEC
6709 }
6710
6711 /* Determine and set the size of the stub section for a final link.
6712
6713 The basic idea here is to examine all the relocations looking for
6714 PC-relative calls to a target that is unreachable with a "bl"
6715 instruction. */
6716
6717 bfd_boolean
6718 ppc64_elf_size_stubs (bfd *output_bfd,
6719 struct bfd_link_info *info,
6720 bfd_signed_vma group_size,
6721 asection *(*add_stub_section) (const char *, asection *),
6722 void (*layout_sections_again) (void))
6723 {
6724 bfd_size_type stub_group_size;
6725 bfd_boolean stubs_always_before_branch;
6726 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6727
6728 /* Stash our params away. */
6729 htab->add_stub_section = add_stub_section;
6730 htab->layout_sections_again = layout_sections_again;
6731 stubs_always_before_branch = group_size < 0;
6732 if (group_size < 0)
6733 stub_group_size = -group_size;
6734 else
6735 stub_group_size = group_size;
6736 if (stub_group_size == 1)
6737 {
6738 /* Default values. */
6739 if (stubs_always_before_branch)
6740 {
6741 stub_group_size = 0x1e00000;
6742 if (htab->has_14bit_branch)
6743 stub_group_size = 0x7800;
6744 }
6745 else
6746 {
6747 stub_group_size = 0x1c00000;
6748 if (htab->has_14bit_branch)
6749 stub_group_size = 0x7000;
6750 }
6751 }
6752
6753 group_sections (htab, stub_group_size, stubs_always_before_branch);
6754
6755 while (1)
6756 {
6757 bfd *input_bfd;
6758 unsigned int bfd_indx;
6759 asection *stub_sec;
6760 bfd_boolean stub_changed;
6761
6762 htab->stub_iteration += 1;
6763 stub_changed = FALSE;
6764
6765 for (input_bfd = info->input_bfds, bfd_indx = 0;
6766 input_bfd != NULL;
6767 input_bfd = input_bfd->link_next, bfd_indx++)
6768 {
6769 Elf_Internal_Shdr *symtab_hdr;
6770 asection *section;
6771 Elf_Internal_Sym *local_syms = NULL;
6772
6773 /* We'll need the symbol table in a second. */
6774 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6775 if (symtab_hdr->sh_info == 0)
6776 continue;
6777
6778 /* Walk over each section attached to the input bfd. */
6779 for (section = input_bfd->sections;
6780 section != NULL;
6781 section = section->next)
6782 {
6783 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6784
6785 /* If there aren't any relocs, then there's nothing more
6786 to do. */
6787 if ((section->flags & SEC_RELOC) == 0
6788 || section->reloc_count == 0)
6789 continue;
6790
6791 /* If this section is a link-once section that will be
6792 discarded, then don't create any stubs. */
6793 if (section->output_section == NULL
6794 || section->output_section->owner != output_bfd)
6795 continue;
6796
6797 /* Get the relocs. */
6798 internal_relocs
6799 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6800 info->keep_memory);
6801 if (internal_relocs == NULL)
6802 goto error_ret_free_local;
6803
6804 /* Now examine each relocation. */
6805 irela = internal_relocs;
6806 irelaend = irela + section->reloc_count;
6807 for (; irela < irelaend; irela++)
6808 {
6809 enum elf_ppc64_reloc_type r_type;
6810 unsigned int r_indx;
6811 enum ppc_stub_type stub_type;
6812 struct ppc_stub_hash_entry *stub_entry;
6813 asection *sym_sec;
6814 bfd_vma sym_value;
6815 bfd_vma destination;
6816 struct ppc_link_hash_entry *hash;
6817 struct elf_link_hash_entry *h;
6818 Elf_Internal_Sym *sym;
6819 char *stub_name;
6820 const asection *id_sec;
6821
6822 r_type = ELF64_R_TYPE (irela->r_info);
6823 r_indx = ELF64_R_SYM (irela->r_info);
6824
6825 if (r_type >= R_PPC64_max)
6826 {
6827 bfd_set_error (bfd_error_bad_value);
6828 goto error_ret_free_internal;
6829 }
6830
6831 /* Only look for stubs on branch instructions. */
6832 if (r_type != R_PPC64_REL24
6833 && r_type != R_PPC64_REL14
6834 && r_type != R_PPC64_REL14_BRTAKEN
6835 && r_type != R_PPC64_REL14_BRNTAKEN)
6836 continue;
6837
6838 /* Now determine the call target, its name, value,
6839 section. */
6840 destination = 0;
6841 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6842 r_indx, input_bfd))
6843 goto error_ret_free_internal;
6844 hash = (struct ppc_link_hash_entry *) h;
6845
6846 if (hash == NULL)
6847 {
6848 /* It's a local symbol. */
6849 sym_value = sym->st_value;
6850 destination = (sym_value + irela->r_addend
6851 + sym_sec->output_offset
6852 + sym_sec->output_section->vma);
6853 }
6854 else
6855 {
6856 /* It's an external symbol. */
6857 sym_value = 0;
6858 if (hash->elf.root.type == bfd_link_hash_defined
6859 || hash->elf.root.type == bfd_link_hash_defweak)
6860 {
6861 sym_value = hash->elf.root.u.def.value;
6862 if (sym_sec->output_section != NULL)
6863 destination = (sym_value + irela->r_addend
6864 + sym_sec->output_offset
6865 + sym_sec->output_section->vma);
6866 }
6867 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6868 ;
6869 else if (hash->elf.root.type == bfd_link_hash_undefined)
6870 ;
6871 else
6872 {
6873 bfd_set_error (bfd_error_bad_value);
6874 goto error_ret_free_internal;
6875 }
6876 }
6877
6878 /* Determine what (if any) linker stub is needed. */
6879 stub_type = ppc_type_of_stub (section, irela, &hash,
6880 destination);
6881
6882 if (stub_type != ppc_stub_plt_call)
6883 {
6884 /* Check whether we need a TOC adjusting stub.
6885 Since the linker pastes together pieces from
6886 different object files when creating the
6887 _init and _fini functions, it may be that a
6888 call to what looks like a local sym is in
6889 fact a call needing a TOC adjustment. */
6890 if (sym_sec != NULL
6891 && sym_sec->output_section != NULL
6892 && (htab->stub_group[sym_sec->id].toc_off
6893 != htab->stub_group[section->id].toc_off)
6894 && sym_sec->has_gp_reloc
6895 && section->has_gp_reloc)
6896 stub_type = ppc_stub_long_branch_r2off;
6897 }
6898
6899 if (stub_type == ppc_stub_none)
6900 continue;
6901
6902 /* __tls_get_addr calls might be eliminated. */
6903 if (stub_type != ppc_stub_plt_call
6904 && hash != NULL
6905 && &hash->elf == htab->tls_get_addr
6906 && section->has_tls_reloc
6907 && irela != internal_relocs)
6908 {
6909 /* Get tls info. */
6910 char *tls_mask;
6911
6912 if (!get_tls_mask (&tls_mask, &local_syms,
6913 irela - 1, input_bfd))
6914 goto error_ret_free_internal;
6915 if (*tls_mask != 0)
6916 continue;
6917 }
6918
6919 /* Support for grouping stub sections. */
6920 id_sec = htab->stub_group[section->id].link_sec;
6921
6922 /* Get the name of this stub. */
6923 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6924 if (!stub_name)
6925 goto error_ret_free_internal;
6926
6927 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6928 stub_name, FALSE, FALSE);
6929 if (stub_entry != NULL)
6930 {
6931 /* The proper stub has already been created. */
6932 free (stub_name);
6933 continue;
6934 }
6935
6936 stub_entry = ppc_add_stub (stub_name, section, htab);
6937 if (stub_entry == NULL)
6938 {
6939 free (stub_name);
6940 error_ret_free_internal:
6941 if (elf_section_data (section)->relocs == NULL)
6942 free (internal_relocs);
6943 error_ret_free_local:
6944 if (local_syms != NULL
6945 && (symtab_hdr->contents
6946 != (unsigned char *) local_syms))
6947 free (local_syms);
6948 return FALSE;
6949 }
6950
6951 stub_entry->stub_type = stub_type;
6952 stub_entry->target_value = sym_value;
6953 stub_entry->target_section = sym_sec;
6954 stub_entry->h = hash;
6955 stub_entry->addend = irela->r_addend;
6956 stub_changed = TRUE;
6957 }
6958
6959 /* We're done with the internal relocs, free them. */
6960 if (elf_section_data (section)->relocs != internal_relocs)
6961 free (internal_relocs);
6962 }
6963
6964 if (local_syms != NULL
6965 && symtab_hdr->contents != (unsigned char *) local_syms)
6966 {
6967 if (!info->keep_memory)
6968 free (local_syms);
6969 else
6970 symtab_hdr->contents = (unsigned char *) local_syms;
6971 }
6972 }
6973
6974 if (!stub_changed)
6975 break;
6976
6977 /* OK, we've added some stubs. Find out the new size of the
6978 stub sections. */
6979 for (stub_sec = htab->stub_bfd->sections;
6980 stub_sec != NULL;
6981 stub_sec = stub_sec->next)
6982 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
6983 {
6984 stub_sec->_raw_size = 0;
6985 stub_sec->_cooked_size = 0;
6986 }
6987 htab->brlt->_raw_size = 0;
6988 htab->brlt->_cooked_size = 0;
6989
6990 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
6991
6992 /* Ask the linker to do its stuff. */
6993 (*htab->layout_sections_again) ();
6994 }
6995
6996 /* It would be nice to strip .branch_lt from the output if the
6997 section is empty, but it's too late. If we strip sections here,
6998 the dynamic symbol table is corrupted since the section symbol
6999 for the stripped section isn't written. */
7000
7001 return TRUE;
7002 }
7003
7004 /* Called after we have determined section placement. If sections
7005 move, we'll be called again. Provide a value for TOCstart. */
7006
7007 bfd_vma
7008 ppc64_elf_toc (bfd *obfd)
7009 {
7010 asection *s;
7011 bfd_vma TOCstart;
7012
7013 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7014 order. The TOC starts where the first of these sections starts. */
7015 s = bfd_get_section_by_name (obfd, ".got");
7016 if (s == NULL)
7017 s = bfd_get_section_by_name (obfd, ".toc");
7018 if (s == NULL)
7019 s = bfd_get_section_by_name (obfd, ".tocbss");
7020 if (s == NULL)
7021 s = bfd_get_section_by_name (obfd, ".plt");
7022 if (s == NULL)
7023 {
7024 /* This may happen for
7025 o references to TOC base (SYM@toc / TOC[tc0]) without a
7026 .toc directive
7027 o bad linker script
7028 o --gc-sections and empty TOC sections
7029
7030 FIXME: Warn user? */
7031
7032 /* Look for a likely section. We probably won't even be
7033 using TOCstart. */
7034 for (s = obfd->sections; s != NULL; s = s->next)
7035 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7036 == (SEC_ALLOC | SEC_SMALL_DATA))
7037 break;
7038 if (s == NULL)
7039 for (s = obfd->sections; s != NULL; s = s->next)
7040 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7041 == (SEC_ALLOC | SEC_SMALL_DATA))
7042 break;
7043 if (s == NULL)
7044 for (s = obfd->sections; s != NULL; s = s->next)
7045 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7046 break;
7047 if (s == NULL)
7048 for (s = obfd->sections; s != NULL; s = s->next)
7049 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7050 break;
7051 }
7052
7053 TOCstart = 0;
7054 if (s != NULL)
7055 TOCstart = s->output_section->vma + s->output_offset;
7056
7057 return TOCstart;
7058 }
7059
7060 /* Build all the stubs associated with the current output file.
7061 The stubs are kept in a hash table attached to the main linker
7062 hash table. This function is called via gldelf64ppc_finish. */
7063
7064 bfd_boolean
7065 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7066 struct bfd_link_info *info,
7067 char **stats)
7068 {
7069 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7070 asection *stub_sec;
7071 bfd_byte *p;
7072 int stub_sec_count = 0;
7073
7074 htab->emit_stub_syms = emit_stub_syms;
7075 for (stub_sec = htab->stub_bfd->sections;
7076 stub_sec != NULL;
7077 stub_sec = stub_sec->next)
7078 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7079 {
7080 bfd_size_type size;
7081
7082 /* Allocate memory to hold the linker stubs. */
7083 size = stub_sec->_raw_size;
7084 if (size != 0)
7085 {
7086 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7087 if (stub_sec->contents == NULL)
7088 return FALSE;
7089 }
7090 stub_sec->_cooked_size = 0;
7091 }
7092
7093 if (htab->plt != NULL)
7094 {
7095 unsigned int indx;
7096 bfd_vma plt0;
7097
7098 /* Build the .glink plt call stub. */
7099 plt0 = (htab->plt->output_section->vma
7100 + htab->plt->output_offset
7101 - (htab->glink->output_section->vma
7102 + htab->glink->output_offset
7103 + GLINK_CALL_STUB_SIZE));
7104 if (plt0 + 0x80008000 > 0xffffffff)
7105 {
7106 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7107 bfd_set_error (bfd_error_bad_value);
7108 return FALSE;
7109 }
7110
7111 if (htab->emit_stub_syms)
7112 {
7113 struct elf_link_hash_entry *h;
7114 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7115 if (h == NULL)
7116 return FALSE;
7117 if (h->root.type == bfd_link_hash_new)
7118 {
7119 h->root.type = bfd_link_hash_defined;
7120 h->root.u.def.section = htab->glink;
7121 h->root.u.def.value = 0;
7122 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7123 | ELF_LINK_HASH_DEF_REGULAR
7124 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7125 | ELF_LINK_FORCED_LOCAL);
7126 }
7127 }
7128 p = htab->glink->contents;
7129 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7130 p += 4;
7131 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7132 p += 4;
7133 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7134 p += 4;
7135 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7136 p += 4;
7137 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7138 p += 4;
7139 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7140 p += 4;
7141 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7142 p += 4;
7143 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7144 p += 4;
7145 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7146 p += 4;
7147 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7148 p += 4;
7149 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7150 p += 4;
7151 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7152 p += 4;
7153 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7154 p += 4;
7155 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7156 p += 4;
7157 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7158 p += 4;
7159 bfd_put_32 (htab->glink->owner, BCTR, p);
7160 p += 4;
7161
7162 /* Build the .glink lazy link call stubs. */
7163 indx = 0;
7164 while (p < htab->glink->contents + htab->glink->_raw_size)
7165 {
7166 if (indx < 0x8000)
7167 {
7168 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7169 p += 4;
7170 }
7171 else
7172 {
7173 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7174 p += 4;
7175 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7176 p += 4;
7177 }
7178 bfd_put_32 (htab->glink->owner,
7179 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7180 indx++;
7181 p += 4;
7182 }
7183 htab->glink->_cooked_size = p - htab->glink->contents;
7184 }
7185
7186 if (htab->brlt->_raw_size != 0)
7187 {
7188 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7189 htab->brlt->_raw_size);
7190 if (htab->brlt->contents == NULL)
7191 return FALSE;
7192 }
7193
7194 /* Build the stubs as directed by the stub hash table. */
7195 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7196
7197 for (stub_sec = htab->stub_bfd->sections;
7198 stub_sec != NULL;
7199 stub_sec = stub_sec->next)
7200 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7201 {
7202 stub_sec_count += 1;
7203 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7204 break;
7205 }
7206
7207 if (stub_sec != NULL
7208 || htab->glink->_raw_size != htab->glink->_cooked_size)
7209 {
7210 htab->stub_error = TRUE;
7211 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7212 }
7213
7214 if (htab->stub_error)
7215 return FALSE;
7216
7217 if (stats != NULL)
7218 {
7219 *stats = bfd_malloc (500);
7220 if (*stats == NULL)
7221 return FALSE;
7222
7223 sprintf (*stats, _("linker stubs in %u groups\n"
7224 " branch %lu\n"
7225 " toc adjust %lu\n"
7226 " long branch %lu\n"
7227 " long toc adj %lu\n"
7228 " plt call %lu"),
7229 stub_sec_count,
7230 htab->stub_count[ppc_stub_long_branch - 1],
7231 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7232 htab->stub_count[ppc_stub_plt_branch - 1],
7233 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7234 htab->stub_count[ppc_stub_plt_call - 1]);
7235 }
7236 return TRUE;
7237 }
7238
7239 /* The RELOCATE_SECTION function is called by the ELF backend linker
7240 to handle the relocations for a section.
7241
7242 The relocs are always passed as Rela structures; if the section
7243 actually uses Rel structures, the r_addend field will always be
7244 zero.
7245
7246 This function is responsible for adjust the section contents as
7247 necessary, and (if using Rela relocs and generating a
7248 relocatable output file) adjusting the reloc addend as
7249 necessary.
7250
7251 This function does not have to worry about setting the reloc
7252 address or the reloc symbol index.
7253
7254 LOCAL_SYMS is a pointer to the swapped in local symbols.
7255
7256 LOCAL_SECTIONS is an array giving the section in the input file
7257 corresponding to the st_shndx field of each local symbol.
7258
7259 The global hash table entry for the global symbols can be found
7260 via elf_sym_hashes (input_bfd).
7261
7262 When generating relocatable output, this function must handle
7263 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7264 going to be the section symbol corresponding to the output
7265 section, which means that the addend must be adjusted
7266 accordingly. */
7267
7268 static bfd_boolean
7269 ppc64_elf_relocate_section (bfd *output_bfd,
7270 struct bfd_link_info *info,
7271 bfd *input_bfd,
7272 asection *input_section,
7273 bfd_byte *contents,
7274 Elf_Internal_Rela *relocs,
7275 Elf_Internal_Sym *local_syms,
7276 asection **local_sections)
7277 {
7278 struct ppc_link_hash_table *htab;
7279 Elf_Internal_Shdr *symtab_hdr;
7280 struct elf_link_hash_entry **sym_hashes;
7281 Elf_Internal_Rela *rel;
7282 Elf_Internal_Rela *relend;
7283 Elf_Internal_Rela outrel;
7284 bfd_byte *loc;
7285 struct got_entry **local_got_ents;
7286 bfd_vma TOCstart;
7287 bfd_boolean ret = TRUE;
7288 bfd_boolean is_opd;
7289 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7290 bfd_boolean is_power4 = FALSE;
7291
7292 if (info->relocatable)
7293 return TRUE;
7294
7295 /* Initialize howto table if needed. */
7296 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7297 ppc_howto_init ();
7298
7299 htab = ppc_hash_table (info);
7300 local_got_ents = elf_local_got_ents (input_bfd);
7301 TOCstart = elf_gp (output_bfd);
7302 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7303 sym_hashes = elf_sym_hashes (input_bfd);
7304 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7305
7306 rel = relocs;
7307 relend = relocs + input_section->reloc_count;
7308 for (; rel < relend; rel++)
7309 {
7310 enum elf_ppc64_reloc_type r_type;
7311 bfd_vma addend;
7312 bfd_reloc_status_type r;
7313 Elf_Internal_Sym *sym;
7314 asection *sec;
7315 struct elf_link_hash_entry *h;
7316 struct elf_link_hash_entry *fdh;
7317 const char *sym_name;
7318 unsigned long r_symndx;
7319 char tls_mask, tls_gd, tls_type;
7320 bfd_vma relocation;
7321 bfd_boolean unresolved_reloc;
7322 bfd_boolean warned;
7323 unsigned long insn, mask;
7324 struct ppc_stub_hash_entry *stub_entry;
7325 bfd_vma max_br_offset;
7326 bfd_vma from;
7327
7328 r_type = ELF64_R_TYPE (rel->r_info);
7329 r_symndx = ELF64_R_SYM (rel->r_info);
7330 sym = NULL;
7331 sec = NULL;
7332 h = NULL;
7333 sym_name = NULL;
7334 unresolved_reloc = FALSE;
7335 warned = FALSE;
7336
7337 if (r_symndx < symtab_hdr->sh_info)
7338 {
7339 /* It's a local symbol. */
7340 sym = local_syms + r_symndx;
7341 sec = local_sections[r_symndx];
7342 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7343 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
7344 if (elf_section_data (sec) != NULL)
7345 {
7346 long *opd_sym_adjust;
7347
7348 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7349 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7350 relocation += opd_sym_adjust[sym->st_value / 24];
7351 }
7352 }
7353 else
7354 {
7355 /* It's a global symbol. */
7356 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7357 while (h->root.type == bfd_link_hash_indirect
7358 || h->root.type == bfd_link_hash_warning)
7359 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7360 sym_name = h->root.root.string;
7361 relocation = 0;
7362 if (h->root.type == bfd_link_hash_defined
7363 || h->root.type == bfd_link_hash_defweak)
7364 {
7365 sec = h->root.u.def.section;
7366 if (sec->output_section == NULL)
7367 /* Set a flag that will be cleared later if we find a
7368 relocation value for this symbol. output_section
7369 is typically NULL for symbols satisfied by a shared
7370 library. */
7371 unresolved_reloc = TRUE;
7372 else
7373 relocation = (h->root.u.def.value
7374 + sec->output_section->vma
7375 + sec->output_offset);
7376 }
7377 else if (h->root.type == bfd_link_hash_undefweak)
7378 ;
7379 else if (!info->executable
7380 && !info->no_undefined
7381 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
7382 ;
7383 else
7384 {
7385 if (! ((*info->callbacks->undefined_symbol)
7386 (info, h->root.root.string, input_bfd, input_section,
7387 rel->r_offset, (info->executable
7388 || info->no_undefined
7389 || ELF_ST_VISIBILITY (h->other)))))
7390 return FALSE;
7391 warned = TRUE;
7392 }
7393 }
7394
7395 /* TLS optimizations. Replace instruction sequences and relocs
7396 based on information we collected in tls_optimize. We edit
7397 RELOCS so that --emit-relocs will output something sensible
7398 for the final instruction stream. */
7399 tls_mask = 0;
7400 tls_gd = 0;
7401 if (IS_PPC64_TLS_RELOC (r_type))
7402 {
7403 if (h != NULL)
7404 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7405 else if (local_got_ents != NULL)
7406 {
7407 char *lgot_masks;
7408 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7409 tls_mask = lgot_masks[r_symndx];
7410 }
7411 }
7412
7413 /* Ensure reloc mapping code below stays sane. */
7414 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7415 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7416 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7417 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7418 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7419 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7420 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7421 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7422 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7423 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7424 abort ();
7425 switch (r_type)
7426 {
7427 default:
7428 break;
7429
7430 case R_PPC64_TOC16:
7431 case R_PPC64_TOC16_LO:
7432 case R_PPC64_TOC16_DS:
7433 case R_PPC64_TOC16_LO_DS:
7434 {
7435 /* Check for toc tls entries. */
7436 char *toc_tls;
7437 int retval;
7438
7439 retval = get_tls_mask (&toc_tls, &local_syms, rel, input_bfd);
7440 if (retval == 0)
7441 return FALSE;
7442
7443 if (toc_tls)
7444 {
7445 tls_mask = *toc_tls;
7446 if (r_type == R_PPC64_TOC16_DS
7447 || r_type == R_PPC64_TOC16_LO_DS)
7448 {
7449 if (tls_mask != 0
7450 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7451 goto toctprel;
7452 }
7453 else
7454 {
7455 /* If we found a GD reloc pair, then we might be
7456 doing a GD->IE transition. */
7457 if (retval == 2)
7458 {
7459 tls_gd = TLS_TPRELGD;
7460 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7461 goto tls_get_addr_check;
7462 }
7463 else if (retval == 3)
7464 {
7465 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7466 goto tls_get_addr_check;
7467 }
7468 }
7469 }
7470 }
7471 break;
7472
7473 case R_PPC64_GOT_TPREL16_DS:
7474 case R_PPC64_GOT_TPREL16_LO_DS:
7475 if (tls_mask != 0
7476 && (tls_mask & TLS_TPREL) == 0)
7477 {
7478 toctprel:
7479 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7480 insn &= 31 << 21;
7481 insn |= 0x3c0d0000; /* addis 0,13,0 */
7482 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7483 r_type = R_PPC64_TPREL16_HA;
7484 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7485 }
7486 break;
7487
7488 case R_PPC64_TLS:
7489 if (tls_mask == 0)
7490 {
7491 /* Check for toc tls entries. */
7492 char *toc_tls;
7493
7494 if (!get_tls_mask (&toc_tls, &local_syms, rel, input_bfd))
7495 return FALSE;
7496
7497 if (toc_tls)
7498 tls_mask = *toc_tls;
7499 }
7500 if (tls_mask != 0
7501 && (tls_mask & TLS_TPREL) == 0)
7502 {
7503 bfd_vma rtra;
7504 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7505 if ((insn & ((0x3f << 26) | (31 << 11)))
7506 == ((31 << 26) | (13 << 11)))
7507 rtra = insn & ((1 << 26) - (1 << 16));
7508 else if ((insn & ((0x3f << 26) | (31 << 16)))
7509 == ((31 << 26) | (13 << 16)))
7510 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7511 else
7512 abort ();
7513 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7514 /* add -> addi. */
7515 insn = 14 << 26;
7516 else if ((insn & (31 << 1)) == 23 << 1
7517 && ((insn & (31 << 6)) < 14 << 6
7518 || ((insn & (31 << 6)) >= 16 << 6
7519 && (insn & (31 << 6)) < 24 << 6)))
7520 /* load and store indexed -> dform. */
7521 insn = (32 | ((insn >> 6) & 31)) << 26;
7522 else if ((insn & (31 << 1)) == 21 << 1
7523 && (insn & (0x1a << 6)) == 0)
7524 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7525 insn = (((58 | ((insn >> 6) & 4)) << 26)
7526 | ((insn >> 6) & 1));
7527 else if ((insn & (31 << 1)) == 21 << 1
7528 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7529 /* lwax -> lwa. */
7530 insn = (58 << 26) | 2;
7531 else
7532 abort ();
7533 insn |= rtra;
7534 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7535 r_type = R_PPC64_TPREL16_LO;
7536 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7537 /* Was PPC64_TLS which sits on insn boundary, now
7538 PPC64_TPREL16_LO which is at insn+2. */
7539 rel->r_offset += 2;
7540 }
7541 break;
7542
7543 case R_PPC64_GOT_TLSGD16_HI:
7544 case R_PPC64_GOT_TLSGD16_HA:
7545 tls_gd = TLS_TPRELGD;
7546 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7547 goto tls_gdld_hi;
7548 break;
7549
7550 case R_PPC64_GOT_TLSLD16_HI:
7551 case R_PPC64_GOT_TLSLD16_HA:
7552 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7553 {
7554 tls_gdld_hi:
7555 if ((tls_mask & tls_gd) != 0)
7556 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7557 + R_PPC64_GOT_TPREL16_DS);
7558 else
7559 {
7560 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7561 rel->r_offset -= 2;
7562 r_type = R_PPC64_NONE;
7563 }
7564 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7565 }
7566 break;
7567
7568 case R_PPC64_GOT_TLSGD16:
7569 case R_PPC64_GOT_TLSGD16_LO:
7570 tls_gd = TLS_TPRELGD;
7571 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7572 goto tls_get_addr_check;
7573 break;
7574
7575 case R_PPC64_GOT_TLSLD16:
7576 case R_PPC64_GOT_TLSLD16_LO:
7577 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7578 {
7579 tls_get_addr_check:
7580 if (rel + 1 < relend)
7581 {
7582 enum elf_ppc64_reloc_type r_type2;
7583 unsigned long r_symndx2;
7584 struct elf_link_hash_entry *h2;
7585 bfd_vma insn1, insn2, insn3;
7586 bfd_vma offset;
7587
7588 /* The next instruction should be a call to
7589 __tls_get_addr. Peek at the reloc to be sure. */
7590 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7591 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7592 if (r_symndx2 < symtab_hdr->sh_info
7593 || (r_type2 != R_PPC64_REL14
7594 && r_type2 != R_PPC64_REL14_BRTAKEN
7595 && r_type2 != R_PPC64_REL14_BRNTAKEN
7596 && r_type2 != R_PPC64_REL24))
7597 break;
7598
7599 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7600 while (h2->root.type == bfd_link_hash_indirect
7601 || h2->root.type == bfd_link_hash_warning)
7602 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7603 if (h2 == NULL || h2 != htab->tls_get_addr)
7604 break;
7605
7606 /* OK, it checks out. Replace the call. */
7607 offset = rel[1].r_offset;
7608 insn1 = bfd_get_32 (output_bfd,
7609 contents + rel->r_offset - 2);
7610 insn3 = bfd_get_32 (output_bfd,
7611 contents + offset + 4);
7612 if ((tls_mask & tls_gd) != 0)
7613 {
7614 /* IE */
7615 insn1 &= (1 << 26) - (1 << 2);
7616 insn1 |= 58 << 26; /* ld */
7617 insn2 = 0x7c636a14; /* add 3,3,13 */
7618 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7619 if ((tls_mask & TLS_EXPLICIT) == 0)
7620 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7621 + R_PPC64_GOT_TPREL16_DS);
7622 else
7623 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7624 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7625 }
7626 else
7627 {
7628 /* LE */
7629 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7630 insn2 = 0x38630000; /* addi 3,3,0 */
7631 if (tls_gd == 0)
7632 {
7633 /* Was an LD reloc. */
7634 r_symndx = 0;
7635 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
7636 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
7637 }
7638 r_type = R_PPC64_TPREL16_HA;
7639 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7640 rel[1].r_info = ELF64_R_INFO (r_symndx,
7641 R_PPC64_TPREL16_LO);
7642 rel[1].r_offset += 2;
7643 }
7644 if (insn3 == NOP
7645 || insn3 == CROR_151515 || insn3 == CROR_313131)
7646 {
7647 insn3 = insn2;
7648 insn2 = NOP;
7649 rel[1].r_offset += 4;
7650 }
7651 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7652 bfd_put_32 (output_bfd, insn2, contents + offset);
7653 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7654 if (tls_gd == 0)
7655 {
7656 /* We changed the symbol on an LD reloc. Start over
7657 in order to get h, sym, sec etc. right. */
7658 rel--;
7659 continue;
7660 }
7661 }
7662 }
7663 break;
7664
7665 case R_PPC64_DTPMOD64:
7666 if (rel + 1 < relend
7667 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7668 && rel[1].r_offset == rel->r_offset + 8)
7669 {
7670 if ((tls_mask & TLS_GD) == 0)
7671 {
7672 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7673 if ((tls_mask & TLS_TPRELGD) != 0)
7674 r_type = R_PPC64_TPREL64;
7675 else
7676 {
7677 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7678 r_type = R_PPC64_NONE;
7679 }
7680 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7681 }
7682 }
7683 else
7684 {
7685 if ((tls_mask & TLS_LD) == 0)
7686 {
7687 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7688 r_type = R_PPC64_NONE;
7689 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7690 }
7691 }
7692 break;
7693
7694 case R_PPC64_TPREL64:
7695 if ((tls_mask & TLS_TPREL) == 0)
7696 {
7697 r_type = R_PPC64_NONE;
7698 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7699 }
7700 break;
7701 }
7702
7703 /* Handle other relocations that tweak non-addend part of insn. */
7704 insn = 0;
7705 switch (r_type)
7706 {
7707 default:
7708 break;
7709
7710 /* Branch taken prediction relocations. */
7711 case R_PPC64_ADDR14_BRTAKEN:
7712 case R_PPC64_REL14_BRTAKEN:
7713 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7714 /* Fall thru. */
7715
7716 /* Branch not taken prediction relocations. */
7717 case R_PPC64_ADDR14_BRNTAKEN:
7718 case R_PPC64_REL14_BRNTAKEN:
7719 insn |= bfd_get_32 (output_bfd,
7720 contents + rel->r_offset) & ~(0x01 << 21);
7721 if (is_power4)
7722 {
7723 /* Set 'a' bit. This is 0b00010 in BO field for branch
7724 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7725 for branch on CTR insns (BO == 1a00t or 1a01t). */
7726 if ((insn & (0x14 << 21)) == (0x04 << 21))
7727 insn |= 0x02 << 21;
7728 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7729 insn |= 0x08 << 21;
7730 else
7731 break;
7732 }
7733 else
7734 {
7735 from = (rel->r_offset
7736 + input_section->output_offset
7737 + input_section->output_section->vma);
7738
7739 /* Invert 'y' bit if not the default. */
7740 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7741 insn ^= 0x01 << 21;
7742 }
7743
7744 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7745 break;
7746
7747 case R_PPC64_REL24:
7748 /* Calls to functions with a different TOC, such as calls to
7749 shared objects, need to alter the TOC pointer. This is
7750 done using a linkage stub. A REL24 branching to these
7751 linkage stubs needs to be followed by a nop, as the nop
7752 will be replaced with an instruction to restore the TOC
7753 base pointer. */
7754 if (((h != NULL
7755 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7756 && fdh->plt.plist != NULL)
7757 || ((fdh = h, sec) != NULL
7758 && sec->output_section != NULL
7759 && (htab->stub_group[sec->id].toc_off
7760 != htab->stub_group[input_section->id].toc_off)))
7761 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7762 rel, htab)) != NULL
7763 && (stub_entry->stub_type == ppc_stub_plt_call
7764 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7765 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7766 {
7767 bfd_boolean can_plt_call = 0;
7768
7769 if (rel->r_offset + 8 <= input_section->_cooked_size)
7770 {
7771 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7772 if (insn == NOP
7773 || insn == CROR_151515 || insn == CROR_313131)
7774 {
7775 bfd_put_32 (input_bfd, LD_R2_40R1,
7776 contents + rel->r_offset + 4);
7777 can_plt_call = 1;
7778 }
7779 }
7780
7781 if (!can_plt_call)
7782 {
7783 if (stub_entry->stub_type == ppc_stub_plt_call)
7784 {
7785 /* If this is a plain branch rather than a branch
7786 and link, don't require a nop. */
7787 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7788 if ((insn & 1) == 0)
7789 can_plt_call = 1;
7790 }
7791 else if (h != NULL
7792 && strcmp (h->root.root.string,
7793 ".__libc_start_main") == 0)
7794 {
7795 /* Allow crt1 branch to go via a toc adjusting stub. */
7796 can_plt_call = 1;
7797 }
7798 else
7799 {
7800 if (strcmp (input_section->output_section->name,
7801 ".init") == 0
7802 || strcmp (input_section->output_section->name,
7803 ".fini") == 0)
7804 (*_bfd_error_handler)
7805 (_("%s(%s+0x%lx): automatic multiple TOCs "
7806 "not supported using your crt files; "
7807 "recompile with -mminimal-toc or upgrade gcc"),
7808 bfd_archive_filename (input_bfd),
7809 input_section->name,
7810 (long) rel->r_offset);
7811 else
7812 (*_bfd_error_handler)
7813 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7814 "does not allow automatic multiple TOCs; "
7815 "recompile with -mminimal-toc or "
7816 "-fno-optimize-sibling-calls, "
7817 "or make `%s' extern"),
7818 bfd_archive_filename (input_bfd),
7819 input_section->name,
7820 (long) rel->r_offset,
7821 sym_name,
7822 sym_name);
7823 bfd_set_error (bfd_error_bad_value);
7824 ret = FALSE;
7825 }
7826 }
7827
7828 if (can_plt_call)
7829 {
7830 relocation = (stub_entry->stub_offset
7831 + stub_entry->stub_sec->output_offset
7832 + stub_entry->stub_sec->output_section->vma);
7833 if (stub_entry->stub_type == ppc_stub_plt_call)
7834 unresolved_reloc = FALSE;
7835 }
7836 }
7837
7838 if (h != NULL
7839 && h->root.type == bfd_link_hash_undefweak
7840 && relocation == 0
7841 && rel->r_addend == 0)
7842 {
7843 /* Tweak calls to undefined weak functions to point at a
7844 blr. We can thus call a weak function without first
7845 checking whether the function is defined. We have a
7846 blr at the end of .sfpr. */
7847 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7848 relocation = (htab->sfpr->_raw_size - 4
7849 + htab->sfpr->output_offset
7850 + htab->sfpr->output_section->vma);
7851 from = (rel->r_offset
7852 + input_section->output_offset
7853 + input_section->output_section->vma);
7854
7855 /* But let's not be silly about it. If the blr isn't in
7856 reach, just go to the next instruction. */
7857 if (relocation - from + (1 << 25) >= (1 << 26)
7858 || htab->sfpr->_raw_size == 0)
7859 relocation = from + 4;
7860 }
7861 break;
7862 }
7863
7864 /* Set `addend'. */
7865 tls_type = 0;
7866 addend = rel->r_addend;
7867 switch (r_type)
7868 {
7869 default:
7870 (*_bfd_error_handler)
7871 (_("%s: unknown relocation type %d for symbol %s"),
7872 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7873
7874 bfd_set_error (bfd_error_bad_value);
7875 ret = FALSE;
7876 continue;
7877
7878 case R_PPC64_NONE:
7879 case R_PPC64_TLS:
7880 case R_PPC64_GNU_VTINHERIT:
7881 case R_PPC64_GNU_VTENTRY:
7882 continue;
7883
7884 /* GOT16 relocations. Like an ADDR16 using the symbol's
7885 address in the GOT as relocation value instead of the
7886 symbol's value itself. Also, create a GOT entry for the
7887 symbol and put the symbol value there. */
7888 case R_PPC64_GOT_TLSGD16:
7889 case R_PPC64_GOT_TLSGD16_LO:
7890 case R_PPC64_GOT_TLSGD16_HI:
7891 case R_PPC64_GOT_TLSGD16_HA:
7892 tls_type = TLS_TLS | TLS_GD;
7893 goto dogot;
7894
7895 case R_PPC64_GOT_TLSLD16:
7896 case R_PPC64_GOT_TLSLD16_LO:
7897 case R_PPC64_GOT_TLSLD16_HI:
7898 case R_PPC64_GOT_TLSLD16_HA:
7899 tls_type = TLS_TLS | TLS_LD;
7900 goto dogot;
7901
7902 case R_PPC64_GOT_TPREL16_DS:
7903 case R_PPC64_GOT_TPREL16_LO_DS:
7904 case R_PPC64_GOT_TPREL16_HI:
7905 case R_PPC64_GOT_TPREL16_HA:
7906 tls_type = TLS_TLS | TLS_TPREL;
7907 goto dogot;
7908
7909 case R_PPC64_GOT_DTPREL16_DS:
7910 case R_PPC64_GOT_DTPREL16_LO_DS:
7911 case R_PPC64_GOT_DTPREL16_HI:
7912 case R_PPC64_GOT_DTPREL16_HA:
7913 tls_type = TLS_TLS | TLS_DTPREL;
7914 goto dogot;
7915
7916 case R_PPC64_GOT16:
7917 case R_PPC64_GOT16_LO:
7918 case R_PPC64_GOT16_HI:
7919 case R_PPC64_GOT16_HA:
7920 case R_PPC64_GOT16_DS:
7921 case R_PPC64_GOT16_LO_DS:
7922 dogot:
7923 {
7924 /* Relocation is to the entry for this symbol in the global
7925 offset table. */
7926 asection *got;
7927 bfd_vma *offp;
7928 bfd_vma off;
7929 unsigned long indx = 0;
7930
7931 if (tls_type == (TLS_TLS | TLS_LD)
7932 && (h == NULL
7933 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
7934 offp = &ppc64_tlsld_got (input_bfd)->offset;
7935 else
7936 {
7937 struct got_entry *ent;
7938
7939 if (h != NULL)
7940 {
7941 bfd_boolean dyn = htab->elf.dynamic_sections_created;
7942 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7943 || (info->shared
7944 && SYMBOL_REFERENCES_LOCAL (info, h)))
7945 /* This is actually a static link, or it is a
7946 -Bsymbolic link and the symbol is defined
7947 locally, or the symbol was forced to be local
7948 because of a version file. */
7949 ;
7950 else
7951 {
7952 indx = h->dynindx;
7953 unresolved_reloc = FALSE;
7954 }
7955 ent = h->got.glist;
7956 }
7957 else
7958 {
7959 if (local_got_ents == NULL)
7960 abort ();
7961 ent = local_got_ents[r_symndx];
7962 }
7963
7964 for (; ent != NULL; ent = ent->next)
7965 if (ent->addend == rel->r_addend
7966 && ent->owner == input_bfd
7967 && ent->tls_type == tls_type)
7968 break;
7969 if (ent == NULL)
7970 abort ();
7971 offp = &ent->got.offset;
7972 }
7973
7974 got = ppc64_elf_tdata (input_bfd)->got;
7975 if (got == NULL)
7976 abort ();
7977
7978 /* The offset must always be a multiple of 8. We use the
7979 least significant bit to record whether we have already
7980 processed this entry. */
7981 off = *offp;
7982 if ((off & 1) != 0)
7983 off &= ~1;
7984 else
7985 {
7986 /* Generate relocs for the dynamic linker, except in
7987 the case of TLSLD where we'll use one entry per
7988 module. */
7989 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
7990
7991 *offp = off | 1;
7992 if ((info->shared || indx != 0)
7993 && (h == NULL
7994 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7995 || h->root.type != bfd_link_hash_undefweak))
7996 {
7997 outrel.r_offset = (got->output_section->vma
7998 + got->output_offset
7999 + off);
8000 outrel.r_addend = rel->r_addend;
8001 if (tls_type & (TLS_LD | TLS_GD))
8002 {
8003 outrel.r_addend = 0;
8004 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8005 if (tls_type == (TLS_TLS | TLS_GD))
8006 {
8007 loc = relgot->contents;
8008 loc += (relgot->reloc_count++
8009 * sizeof (Elf64_External_Rela));
8010 bfd_elf64_swap_reloca_out (output_bfd,
8011 &outrel, loc);
8012 outrel.r_offset += 8;
8013 outrel.r_addend = rel->r_addend;
8014 outrel.r_info
8015 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8016 }
8017 }
8018 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8019 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8020 else if (tls_type == (TLS_TLS | TLS_TPREL))
8021 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8022 else if (indx == 0)
8023 {
8024 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8025
8026 /* Write the .got section contents for the sake
8027 of prelink. */
8028 loc = got->contents + off;
8029 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8030 loc);
8031 }
8032 else
8033 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8034
8035 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8036 {
8037 outrel.r_addend += relocation;
8038 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8039 outrel.r_addend -= htab->tls_sec->vma;
8040 }
8041 loc = relgot->contents;
8042 loc += (relgot->reloc_count++
8043 * sizeof (Elf64_External_Rela));
8044 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8045 }
8046
8047 /* Init the .got section contents here if we're not
8048 emitting a reloc. */
8049 else
8050 {
8051 relocation += rel->r_addend;
8052 if (tls_type == (TLS_TLS | TLS_LD))
8053 relocation = 1;
8054 else if (tls_type != 0)
8055 {
8056 relocation -= htab->tls_sec->vma + DTP_OFFSET;
8057 if (tls_type == (TLS_TLS | TLS_TPREL))
8058 relocation += DTP_OFFSET - TP_OFFSET;
8059
8060 if (tls_type == (TLS_TLS | TLS_GD))
8061 {
8062 bfd_put_64 (output_bfd, relocation,
8063 got->contents + off + 8);
8064 relocation = 1;
8065 }
8066 }
8067
8068 bfd_put_64 (output_bfd, relocation,
8069 got->contents + off);
8070 }
8071 }
8072
8073 if (off >= (bfd_vma) -2)
8074 abort ();
8075
8076 relocation = got->output_offset + off;
8077
8078 /* TOC base (r2) is TOC start plus 0x8000. */
8079 addend = -TOC_BASE_OFF;
8080 }
8081 break;
8082
8083 case R_PPC64_PLT16_HA:
8084 case R_PPC64_PLT16_HI:
8085 case R_PPC64_PLT16_LO:
8086 case R_PPC64_PLT32:
8087 case R_PPC64_PLT64:
8088 /* Relocation is to the entry for this symbol in the
8089 procedure linkage table. */
8090
8091 /* Resolve a PLT reloc against a local symbol directly,
8092 without using the procedure linkage table. */
8093 if (h == NULL)
8094 break;
8095
8096 /* It's possible that we didn't make a PLT entry for this
8097 symbol. This happens when statically linking PIC code,
8098 or when using -Bsymbolic. Go find a match if there is a
8099 PLT entry. */
8100 if (htab->plt != NULL)
8101 {
8102 struct plt_entry *ent;
8103 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8104 if (ent->addend == rel->r_addend
8105 && ent->plt.offset != (bfd_vma) -1)
8106 {
8107 relocation = (htab->plt->output_section->vma
8108 + htab->plt->output_offset
8109 + ent->plt.offset);
8110 unresolved_reloc = FALSE;
8111 }
8112 }
8113 break;
8114
8115 case R_PPC64_TOC:
8116 /* Relocation value is TOC base. */
8117 relocation = TOCstart;
8118 if (r_symndx == 0)
8119 relocation += htab->stub_group[input_section->id].toc_off;
8120 else if (sec != NULL && !unresolved_reloc)
8121 relocation += htab->stub_group[sec->id].toc_off;
8122 else
8123 unresolved_reloc = TRUE;
8124 goto dodyn2;
8125
8126 /* TOC16 relocs. We want the offset relative to the TOC base,
8127 which is the address of the start of the TOC plus 0x8000.
8128 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8129 in this order. */
8130 case R_PPC64_TOC16:
8131 case R_PPC64_TOC16_LO:
8132 case R_PPC64_TOC16_HI:
8133 case R_PPC64_TOC16_DS:
8134 case R_PPC64_TOC16_LO_DS:
8135 case R_PPC64_TOC16_HA:
8136 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8137 break;
8138
8139 /* Relocate against the beginning of the section. */
8140 case R_PPC64_SECTOFF:
8141 case R_PPC64_SECTOFF_LO:
8142 case R_PPC64_SECTOFF_HI:
8143 case R_PPC64_SECTOFF_DS:
8144 case R_PPC64_SECTOFF_LO_DS:
8145 case R_PPC64_SECTOFF_HA:
8146 if (sec != NULL)
8147 addend -= sec->output_section->vma;
8148 break;
8149
8150 case R_PPC64_REL14:
8151 case R_PPC64_REL14_BRNTAKEN:
8152 case R_PPC64_REL14_BRTAKEN:
8153 case R_PPC64_REL24:
8154 break;
8155
8156 case R_PPC64_TPREL16:
8157 case R_PPC64_TPREL16_LO:
8158 case R_PPC64_TPREL16_HI:
8159 case R_PPC64_TPREL16_HA:
8160 case R_PPC64_TPREL16_DS:
8161 case R_PPC64_TPREL16_LO_DS:
8162 case R_PPC64_TPREL16_HIGHER:
8163 case R_PPC64_TPREL16_HIGHERA:
8164 case R_PPC64_TPREL16_HIGHEST:
8165 case R_PPC64_TPREL16_HIGHESTA:
8166 addend -= htab->tls_sec->vma + TP_OFFSET;
8167 if (info->shared)
8168 /* The TPREL16 relocs shouldn't really be used in shared
8169 libs as they will result in DT_TEXTREL being set, but
8170 support them anyway. */
8171 goto dodyn;
8172 break;
8173
8174 case R_PPC64_DTPREL16:
8175 case R_PPC64_DTPREL16_LO:
8176 case R_PPC64_DTPREL16_HI:
8177 case R_PPC64_DTPREL16_HA:
8178 case R_PPC64_DTPREL16_DS:
8179 case R_PPC64_DTPREL16_LO_DS:
8180 case R_PPC64_DTPREL16_HIGHER:
8181 case R_PPC64_DTPREL16_HIGHERA:
8182 case R_PPC64_DTPREL16_HIGHEST:
8183 case R_PPC64_DTPREL16_HIGHESTA:
8184 addend -= htab->tls_sec->vma + DTP_OFFSET;
8185 break;
8186
8187 case R_PPC64_DTPMOD64:
8188 relocation = 1;
8189 addend = 0;
8190 goto dodyn;
8191
8192 case R_PPC64_TPREL64:
8193 addend -= htab->tls_sec->vma + TP_OFFSET;
8194 goto dodyn;
8195
8196 case R_PPC64_DTPREL64:
8197 addend -= htab->tls_sec->vma + DTP_OFFSET;
8198 /* Fall thru */
8199
8200 /* Relocations that may need to be propagated if this is a
8201 dynamic object. */
8202 case R_PPC64_REL30:
8203 case R_PPC64_REL32:
8204 case R_PPC64_REL64:
8205 case R_PPC64_ADDR14:
8206 case R_PPC64_ADDR14_BRNTAKEN:
8207 case R_PPC64_ADDR14_BRTAKEN:
8208 case R_PPC64_ADDR16:
8209 case R_PPC64_ADDR16_DS:
8210 case R_PPC64_ADDR16_HA:
8211 case R_PPC64_ADDR16_HI:
8212 case R_PPC64_ADDR16_HIGHER:
8213 case R_PPC64_ADDR16_HIGHERA:
8214 case R_PPC64_ADDR16_HIGHEST:
8215 case R_PPC64_ADDR16_HIGHESTA:
8216 case R_PPC64_ADDR16_LO:
8217 case R_PPC64_ADDR16_LO_DS:
8218 case R_PPC64_ADDR24:
8219 case R_PPC64_ADDR32:
8220 case R_PPC64_ADDR64:
8221 case R_PPC64_UADDR16:
8222 case R_PPC64_UADDR32:
8223 case R_PPC64_UADDR64:
8224 /* r_symndx will be zero only for relocs against symbols
8225 from removed linkonce sections, or sections discarded by
8226 a linker script. */
8227 dodyn:
8228 if (r_symndx == 0)
8229 break;
8230 /* Fall thru. */
8231
8232 dodyn2:
8233 if ((input_section->flags & SEC_ALLOC) == 0)
8234 break;
8235
8236 if (NO_OPD_RELOCS && is_opd)
8237 break;
8238
8239 if ((info->shared
8240 && (h == NULL
8241 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8242 || h->root.type != bfd_link_hash_undefweak)
8243 && (MUST_BE_DYN_RELOC (r_type)
8244 || !SYMBOL_CALLS_LOCAL (info, h)))
8245 || (ELIMINATE_COPY_RELOCS
8246 && !info->shared
8247 && h != NULL
8248 && h->dynindx != -1
8249 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8250 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8251 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8252 {
8253 Elf_Internal_Rela outrel;
8254 bfd_boolean skip, relocate;
8255 asection *sreloc;
8256 bfd_byte *loc;
8257 bfd_vma out_off;
8258
8259 /* When generating a dynamic object, these relocations
8260 are copied into the output file to be resolved at run
8261 time. */
8262
8263 skip = FALSE;
8264 relocate = FALSE;
8265
8266 out_off = _bfd_elf_section_offset (output_bfd, info,
8267 input_section, rel->r_offset);
8268 if (out_off == (bfd_vma) -1)
8269 skip = TRUE;
8270 else if (out_off == (bfd_vma) -2)
8271 skip = TRUE, relocate = TRUE;
8272 out_off += (input_section->output_section->vma
8273 + input_section->output_offset);
8274 outrel.r_offset = out_off;
8275 outrel.r_addend = rel->r_addend;
8276
8277 /* Optimize unaligned reloc use. */
8278 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8279 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8280 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8281 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8282 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8283 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8284 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8285 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8286 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8287
8288 if (skip)
8289 memset (&outrel, 0, sizeof outrel);
8290 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8291 && !is_opd
8292 && r_type != R_PPC64_TOC)
8293 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8294 else
8295 {
8296 /* This symbol is local, or marked to become local,
8297 or this is an opd section reloc which must point
8298 at a local function. */
8299 outrel.r_addend += relocation;
8300 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8301 {
8302 if (is_opd && h != NULL)
8303 {
8304 /* Lie about opd entries. This case occurs
8305 when building shared libraries and we
8306 reference a function in another shared
8307 lib. The same thing happens for a weak
8308 definition in an application that's
8309 overridden by a strong definition in a
8310 shared lib. (I believe this is a generic
8311 bug in binutils handling of weak syms.)
8312 In these cases we won't use the opd
8313 entry in this lib. */
8314 unresolved_reloc = FALSE;
8315 }
8316 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8317
8318 /* We need to relocate .opd contents for ld.so.
8319 Prelink also wants simple and consistent rules
8320 for relocs. This make all RELATIVE relocs have
8321 *r_offset equal to r_addend. */
8322 relocate = TRUE;
8323 }
8324 else
8325 {
8326 long indx = 0;
8327
8328 if (bfd_is_abs_section (sec))
8329 ;
8330 else if (sec == NULL || sec->owner == NULL)
8331 {
8332 bfd_set_error (bfd_error_bad_value);
8333 return FALSE;
8334 }
8335 else
8336 {
8337 asection *osec;
8338
8339 osec = sec->output_section;
8340 indx = elf_section_data (osec)->dynindx;
8341
8342 /* We are turning this relocation into one
8343 against a section symbol, so subtract out
8344 the output section's address but not the
8345 offset of the input section in the output
8346 section. */
8347 outrel.r_addend -= osec->vma;
8348 }
8349
8350 outrel.r_info = ELF64_R_INFO (indx, r_type);
8351 }
8352 }
8353
8354 sreloc = elf_section_data (input_section)->sreloc;
8355 if (sreloc == NULL)
8356 abort ();
8357
8358 loc = sreloc->contents;
8359 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8360 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8361
8362 /* If this reloc is against an external symbol, it will
8363 be computed at runtime, so there's no need to do
8364 anything now. However, for the sake of prelink ensure
8365 that the section contents are a known value. */
8366 if (! relocate)
8367 {
8368 unresolved_reloc = FALSE;
8369 /* The value chosen here is quite arbitrary as ld.so
8370 ignores section contents except for the special
8371 case of .opd where the contents might be accessed
8372 before relocation. Choose zero, as that won't
8373 cause reloc overflow. */
8374 relocation = 0;
8375 addend = 0;
8376 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8377 to improve backward compatibility with older
8378 versions of ld. */
8379 if (r_type == R_PPC64_ADDR64)
8380 addend = outrel.r_addend;
8381 /* Adjust pc_relative relocs to have zero in *r_offset. */
8382 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8383 addend = (input_section->output_section->vma
8384 + input_section->output_offset
8385 + rel->r_offset);
8386 }
8387 }
8388 break;
8389
8390 case R_PPC64_COPY:
8391 case R_PPC64_GLOB_DAT:
8392 case R_PPC64_JMP_SLOT:
8393 case R_PPC64_RELATIVE:
8394 /* We shouldn't ever see these dynamic relocs in relocatable
8395 files. */
8396 /* Fall through. */
8397
8398 case R_PPC64_PLTGOT16:
8399 case R_PPC64_PLTGOT16_DS:
8400 case R_PPC64_PLTGOT16_HA:
8401 case R_PPC64_PLTGOT16_HI:
8402 case R_PPC64_PLTGOT16_LO:
8403 case R_PPC64_PLTGOT16_LO_DS:
8404 case R_PPC64_PLTREL32:
8405 case R_PPC64_PLTREL64:
8406 /* These ones haven't been implemented yet. */
8407
8408 (*_bfd_error_handler)
8409 (_("%s: relocation %s is not supported for symbol %s."),
8410 bfd_archive_filename (input_bfd),
8411 ppc64_elf_howto_table[r_type]->name, sym_name);
8412
8413 bfd_set_error (bfd_error_invalid_operation);
8414 ret = FALSE;
8415 continue;
8416 }
8417
8418 /* Do any further special processing. */
8419 switch (r_type)
8420 {
8421 default:
8422 break;
8423
8424 case R_PPC64_ADDR16_HA:
8425 case R_PPC64_ADDR16_HIGHERA:
8426 case R_PPC64_ADDR16_HIGHESTA:
8427 case R_PPC64_GOT16_HA:
8428 case R_PPC64_PLTGOT16_HA:
8429 case R_PPC64_PLT16_HA:
8430 case R_PPC64_TOC16_HA:
8431 case R_PPC64_SECTOFF_HA:
8432 case R_PPC64_TPREL16_HA:
8433 case R_PPC64_DTPREL16_HA:
8434 case R_PPC64_GOT_TLSGD16_HA:
8435 case R_PPC64_GOT_TLSLD16_HA:
8436 case R_PPC64_GOT_TPREL16_HA:
8437 case R_PPC64_GOT_DTPREL16_HA:
8438 case R_PPC64_TPREL16_HIGHER:
8439 case R_PPC64_TPREL16_HIGHERA:
8440 case R_PPC64_TPREL16_HIGHEST:
8441 case R_PPC64_TPREL16_HIGHESTA:
8442 case R_PPC64_DTPREL16_HIGHER:
8443 case R_PPC64_DTPREL16_HIGHERA:
8444 case R_PPC64_DTPREL16_HIGHEST:
8445 case R_PPC64_DTPREL16_HIGHESTA:
8446 /* It's just possible that this symbol is a weak symbol
8447 that's not actually defined anywhere. In that case,
8448 'sec' would be NULL, and we should leave the symbol
8449 alone (it will be set to zero elsewhere in the link). */
8450 if (sec != NULL)
8451 /* Add 0x10000 if sign bit in 0:15 is set.
8452 Bits 0:15 are not used. */
8453 addend += 0x8000;
8454 break;
8455
8456 case R_PPC64_ADDR16_DS:
8457 case R_PPC64_ADDR16_LO_DS:
8458 case R_PPC64_GOT16_DS:
8459 case R_PPC64_GOT16_LO_DS:
8460 case R_PPC64_PLT16_LO_DS:
8461 case R_PPC64_SECTOFF_DS:
8462 case R_PPC64_SECTOFF_LO_DS:
8463 case R_PPC64_TOC16_DS:
8464 case R_PPC64_TOC16_LO_DS:
8465 case R_PPC64_PLTGOT16_DS:
8466 case R_PPC64_PLTGOT16_LO_DS:
8467 case R_PPC64_GOT_TPREL16_DS:
8468 case R_PPC64_GOT_TPREL16_LO_DS:
8469 case R_PPC64_GOT_DTPREL16_DS:
8470 case R_PPC64_GOT_DTPREL16_LO_DS:
8471 case R_PPC64_TPREL16_DS:
8472 case R_PPC64_TPREL16_LO_DS:
8473 case R_PPC64_DTPREL16_DS:
8474 case R_PPC64_DTPREL16_LO_DS:
8475 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8476 mask = 3;
8477 /* If this reloc is against an lq insn, then the value must be
8478 a multiple of 16. This is somewhat of a hack, but the
8479 "correct" way to do this by defining _DQ forms of all the
8480 _DS relocs bloats all reloc switches in this file. It
8481 doesn't seem to make much sense to use any of these relocs
8482 in data, so testing the insn should be safe. */
8483 if ((insn & (0x3f << 26)) == (56u << 26))
8484 mask = 15;
8485 if (((relocation + addend) & mask) != 0)
8486 {
8487 (*_bfd_error_handler)
8488 (_("%s: error: relocation %s not a multiple of %d"),
8489 bfd_archive_filename (input_bfd),
8490 ppc64_elf_howto_table[r_type]->name,
8491 mask + 1);
8492 bfd_set_error (bfd_error_bad_value);
8493 ret = FALSE;
8494 continue;
8495 }
8496 break;
8497
8498 case R_PPC64_REL14:
8499 case R_PPC64_REL14_BRNTAKEN:
8500 case R_PPC64_REL14_BRTAKEN:
8501 max_br_offset = 1 << 15;
8502 goto branch_check;
8503
8504 case R_PPC64_REL24:
8505 max_br_offset = 1 << 25;
8506
8507 branch_check:
8508 /* If the branch is out of reach or the TOC register needs
8509 adjusting, then redirect the call to the local stub for
8510 this function. */
8511 from = (rel->r_offset
8512 + input_section->output_offset
8513 + input_section->output_section->vma);
8514 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8515 || (sec != NULL
8516 && sec->output_section != NULL
8517 && sec->id <= htab->top_id
8518 && (htab->stub_group[sec->id].toc_off
8519 != htab->stub_group[input_section->id].toc_off)))
8520 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8521 rel, htab)) != NULL)
8522 {
8523 /* Munge up the value and addend so that we call the stub
8524 rather than the procedure directly. */
8525 relocation = (stub_entry->stub_offset
8526 + stub_entry->stub_sec->output_offset
8527 + stub_entry->stub_sec->output_section->vma);
8528 addend = 0;
8529 }
8530 break;
8531 }
8532
8533 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8534 because such sections are not SEC_ALLOC and thus ld.so will
8535 not process them. */
8536 if (unresolved_reloc
8537 && !((input_section->flags & SEC_DEBUGGING) != 0
8538 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8539 {
8540 (*_bfd_error_handler)
8541 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8542 bfd_archive_filename (input_bfd),
8543 bfd_get_section_name (input_bfd, input_section),
8544 (long) rel->r_offset,
8545 ppc64_elf_howto_table[(int) r_type]->name,
8546 h->root.root.string);
8547 ret = FALSE;
8548 }
8549
8550 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8551 input_bfd,
8552 input_section,
8553 contents,
8554 rel->r_offset,
8555 relocation,
8556 addend);
8557
8558 if (r != bfd_reloc_ok)
8559 {
8560 if (sym_name == NULL)
8561 sym_name = "(null)";
8562 if (r == bfd_reloc_overflow)
8563 {
8564 if (warned)
8565 continue;
8566 if (h != NULL
8567 && h->root.type == bfd_link_hash_undefweak
8568 && ppc64_elf_howto_table[r_type]->pc_relative)
8569 {
8570 /* Assume this is a call protected by other code that
8571 detects the symbol is undefined. If this is the case,
8572 we can safely ignore the overflow. If not, the
8573 program is hosed anyway, and a little warning isn't
8574 going to help. */
8575
8576 continue;
8577 }
8578
8579 if (!((*info->callbacks->reloc_overflow)
8580 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8581 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8582 return FALSE;
8583 }
8584 else
8585 {
8586 (*_bfd_error_handler)
8587 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8588 bfd_archive_filename (input_bfd),
8589 bfd_get_section_name (input_bfd, input_section),
8590 (long) rel->r_offset,
8591 ppc64_elf_howto_table[r_type]->name,
8592 sym_name,
8593 (int) r);
8594 ret = FALSE;
8595 }
8596 }
8597 }
8598
8599 return ret;
8600 }
8601
8602 /* Finish up dynamic symbol handling. We set the contents of various
8603 dynamic sections here. */
8604
8605 static bfd_boolean
8606 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8607 struct bfd_link_info *info,
8608 struct elf_link_hash_entry *h,
8609 Elf_Internal_Sym *sym)
8610 {
8611 struct ppc_link_hash_table *htab;
8612 bfd *dynobj;
8613
8614 htab = ppc_hash_table (info);
8615 dynobj = htab->elf.dynobj;
8616
8617 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8618 {
8619 struct plt_entry *ent;
8620 Elf_Internal_Rela rela;
8621 bfd_byte *loc;
8622
8623 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8624 if (ent->plt.offset != (bfd_vma) -1)
8625 {
8626 /* This symbol has an entry in the procedure linkage
8627 table. Set it up. */
8628
8629 if (htab->plt == NULL
8630 || htab->relplt == NULL
8631 || htab->glink == NULL)
8632 abort ();
8633
8634 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8635 fill in the PLT entry. */
8636 rela.r_offset = (htab->plt->output_section->vma
8637 + htab->plt->output_offset
8638 + ent->plt.offset);
8639 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8640 rela.r_addend = ent->addend;
8641
8642 loc = htab->relplt->contents;
8643 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8644 * sizeof (Elf64_External_Rela));
8645 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8646 }
8647 }
8648
8649 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8650 {
8651 Elf_Internal_Rela rela;
8652 bfd_byte *loc;
8653
8654 /* This symbol needs a copy reloc. Set it up. */
8655
8656 if (h->dynindx == -1
8657 || (h->root.type != bfd_link_hash_defined
8658 && h->root.type != bfd_link_hash_defweak)
8659 || htab->relbss == NULL)
8660 abort ();
8661
8662 rela.r_offset = (h->root.u.def.value
8663 + h->root.u.def.section->output_section->vma
8664 + h->root.u.def.section->output_offset);
8665 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8666 rela.r_addend = 0;
8667 loc = htab->relbss->contents;
8668 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8669 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8670 }
8671
8672 /* Mark some specially defined symbols as absolute. */
8673 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8674 sym->st_shndx = SHN_ABS;
8675
8676 return TRUE;
8677 }
8678
8679 /* Used to decide how to sort relocs in an optimal manner for the
8680 dynamic linker, before writing them out. */
8681
8682 static enum elf_reloc_type_class
8683 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8684 {
8685 enum elf_ppc64_reloc_type r_type;
8686
8687 r_type = ELF64_R_TYPE (rela->r_info);
8688 switch (r_type)
8689 {
8690 case R_PPC64_RELATIVE:
8691 return reloc_class_relative;
8692 case R_PPC64_JMP_SLOT:
8693 return reloc_class_plt;
8694 case R_PPC64_COPY:
8695 return reloc_class_copy;
8696 default:
8697 return reloc_class_normal;
8698 }
8699 }
8700
8701 /* Finish up the dynamic sections. */
8702
8703 static bfd_boolean
8704 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8705 struct bfd_link_info *info)
8706 {
8707 struct ppc_link_hash_table *htab;
8708 bfd *dynobj;
8709 asection *sdyn;
8710
8711 htab = ppc_hash_table (info);
8712 dynobj = htab->elf.dynobj;
8713 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8714
8715 if (htab->elf.dynamic_sections_created)
8716 {
8717 Elf64_External_Dyn *dyncon, *dynconend;
8718
8719 if (sdyn == NULL || htab->got == NULL)
8720 abort ();
8721
8722 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8723 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8724 for (; dyncon < dynconend; dyncon++)
8725 {
8726 Elf_Internal_Dyn dyn;
8727 asection *s;
8728
8729 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8730
8731 switch (dyn.d_tag)
8732 {
8733 default:
8734 continue;
8735
8736 case DT_PPC64_GLINK:
8737 s = htab->glink;
8738 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8739 /* We stupidly defined DT_PPC64_GLINK to be the start
8740 of glink rather than the first entry point, which is
8741 what ld.so needs, and now have a bigger stub to
8742 support automatic multiple TOCs. */
8743 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8744 break;
8745
8746 case DT_PPC64_OPD:
8747 s = bfd_get_section_by_name (output_bfd, ".opd");
8748 if (s == NULL)
8749 continue;
8750 dyn.d_un.d_ptr = s->vma;
8751 break;
8752
8753 case DT_PPC64_OPDSZ:
8754 s = bfd_get_section_by_name (output_bfd, ".opd");
8755 if (s == NULL)
8756 continue;
8757 dyn.d_un.d_val = s->_raw_size;
8758 break;
8759
8760 case DT_PLTGOT:
8761 s = htab->plt;
8762 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8763 break;
8764
8765 case DT_JMPREL:
8766 s = htab->relplt;
8767 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8768 break;
8769
8770 case DT_PLTRELSZ:
8771 dyn.d_un.d_val = htab->relplt->_raw_size;
8772 break;
8773
8774 case DT_RELASZ:
8775 /* Don't count procedure linkage table relocs in the
8776 overall reloc count. */
8777 s = htab->relplt;
8778 if (s == NULL)
8779 continue;
8780 dyn.d_un.d_val -= s->_raw_size;
8781 break;
8782
8783 case DT_RELA:
8784 /* We may not be using the standard ELF linker script.
8785 If .rela.plt is the first .rela section, we adjust
8786 DT_RELA to not include it. */
8787 s = htab->relplt;
8788 if (s == NULL)
8789 continue;
8790 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8791 continue;
8792 dyn.d_un.d_ptr += s->_raw_size;
8793 break;
8794 }
8795
8796 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8797 }
8798 }
8799
8800 if (htab->got != NULL && htab->got->_raw_size != 0)
8801 {
8802 /* Fill in the first entry in the global offset table.
8803 We use it to hold the link-time TOCbase. */
8804 bfd_put_64 (output_bfd,
8805 elf_gp (output_bfd) + TOC_BASE_OFF,
8806 htab->got->contents);
8807
8808 /* Set .got entry size. */
8809 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8810 }
8811
8812 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8813 {
8814 /* Set .plt entry size. */
8815 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8816 = PLT_ENTRY_SIZE;
8817 }
8818
8819 /* We need to handle writing out multiple GOT sections ourselves,
8820 since we didn't add them to DYNOBJ. */
8821 while ((dynobj = dynobj->link_next) != NULL)
8822 {
8823 asection *s;
8824 s = ppc64_elf_tdata (dynobj)->got;
8825 if (s != NULL
8826 && s->_raw_size != 0
8827 && s->output_section != bfd_abs_section_ptr
8828 && !bfd_set_section_contents (output_bfd, s->output_section,
8829 s->contents, s->output_offset,
8830 s->_raw_size))
8831 return FALSE;
8832 s = ppc64_elf_tdata (dynobj)->relgot;
8833 if (s != NULL
8834 && s->_raw_size != 0
8835 && s->output_section != bfd_abs_section_ptr
8836 && !bfd_set_section_contents (output_bfd, s->output_section,
8837 s->contents, s->output_offset,
8838 s->_raw_size))
8839 return FALSE;
8840 }
8841
8842 return TRUE;
8843 }
8844
8845 #include "elf64-target.h"
GDB Binutils - Deliverables
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