1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2015 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
21 /* Notes on implementation:
23 Thread Local Store (TLS)
27 The implementation currently supports both traditional TLS and TLS
28 descriptors, but only general dynamic (GD).
30 For traditional TLS the assembler will present us with code
31 fragments of the form:
34 R_AARCH64_TLSGD_ADR_PAGE21(foo)
35 add x0, :tlsgd_lo12:foo
36 R_AARCH64_TLSGD_ADD_LO12_NC(foo)
40 For TLS descriptors the assembler will present us with code
41 fragments of the form:
43 adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo)
44 ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo)
45 add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo)
47 blr x1 R_AARCH64_TLSDESC_CALL(foo)
49 The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo
50 indicate that foo is thread local and should be accessed via the
51 traditional TLS mechanims.
53 The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC}
54 against foo indicate that 'foo' is thread local and should be accessed
55 via a TLS descriptor mechanism.
57 The precise instruction sequence is only relevant from the
58 perspective of linker relaxation which is currently not implemented.
60 The static linker must detect that 'foo' is a TLS object and
61 allocate a double GOT entry. The GOT entry must be created for both
62 global and local TLS symbols. Note that this is different to none
63 TLS local objects which do not need a GOT entry.
65 In the traditional TLS mechanism, the double GOT entry is used to
66 provide the tls_index structure, containing module and offset
67 entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD
68 on the module entry. The loader will subsequently fixup this
69 relocation with the module identity.
71 For global traditional TLS symbols the static linker places an
72 R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader
73 will subsequently fixup the offset. For local TLS symbols the static
74 linker fixes up offset.
76 In the TLS descriptor mechanism the double GOT entry is used to
77 provide the descriptor. The static linker places the relocation
78 R_AARCH64_TLSDESC on the first GOT slot. The loader will
79 subsequently fix this up.
83 The handling of TLS symbols is implemented across a number of
84 different backend functions. The following is a top level view of
85 what processing is performed where.
87 The TLS implementation maintains state information for each TLS
88 symbol. The state information for local and global symbols is kept
89 in different places. Global symbols use generic BFD structures while
90 local symbols use backend specific structures that are allocated and
91 maintained entirely by the backend.
95 elfNN_aarch64_check_relocs()
97 This function is invoked for each relocation.
99 The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and
100 R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are
101 spotted. One time creation of local symbol data structures are
102 created when the first local symbol is seen.
104 The reference count for a symbol is incremented. The GOT type for
105 each symbol is marked as general dynamic.
107 elfNN_aarch64_allocate_dynrelocs ()
109 For each global with positive reference count we allocate a double
110 GOT slot. For a traditional TLS symbol we allocate space for two
111 relocation entries on the GOT, for a TLS descriptor symbol we
112 allocate space for one relocation on the slot. Record the GOT offset
115 elfNN_aarch64_size_dynamic_sections ()
117 Iterate all input BFDS, look for in the local symbol data structure
118 constructed earlier for local TLS symbols and allocate them double
119 GOT slots along with space for a single GOT relocation. Update the
120 local symbol structure to record the GOT offset allocated.
122 elfNN_aarch64_relocate_section ()
124 Calls elfNN_aarch64_final_link_relocate ()
126 Emit the relevant TLS relocations against the GOT for each TLS
127 symbol. For local TLS symbols emit the GOT offset directly. The GOT
128 relocations are emitted once the first time a TLS symbol is
129 encountered. The implementation uses the LSB of the GOT offset to
130 flag that the relevant GOT relocations for a symbol have been
131 emitted. All of the TLS code that uses the GOT offset needs to take
132 care to mask out this flag bit before using the offset.
134 elfNN_aarch64_final_link_relocate ()
136 Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
140 #include "libiberty.h"
142 #include "bfd_stdint.h"
145 #include "objalloc.h"
146 #include "elf/aarch64.h"
147 #include "elfxx-aarch64.h"
152 #define AARCH64_R(NAME) R_AARCH64_ ## NAME
153 #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
154 #define HOWTO64(...) HOWTO (__VA_ARGS__)
155 #define HOWTO32(...) EMPTY_HOWTO (0)
156 #define LOG_FILE_ALIGN 3
160 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
161 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
162 #define HOWTO64(...) EMPTY_HOWTO (0)
163 #define HOWTO32(...) HOWTO (__VA_ARGS__)
164 #define LOG_FILE_ALIGN 2
167 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
168 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
188 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
190 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
191 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC)
204 #define ELIMINATE_COPY_RELOCS 0
206 /* Return size of a relocation entry. HTAB is the bfd's
207 elf_aarch64_link_hash_entry. */
208 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
210 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
211 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
212 #define PLT_ENTRY_SIZE (32)
213 #define PLT_SMALL_ENTRY_SIZE (16)
214 #define PLT_TLSDESC_ENTRY_SIZE (32)
216 /* Encoding of the nop instruction */
217 #define INSN_NOP 0xd503201f
219 #define aarch64_compute_jump_table_size(htab) \
220 (((htab)->root.srelplt == NULL) ? 0 \
221 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
223 /* The first entry in a procedure linkage table looks like this
224 if the distance between the PLTGOT and the PLT is < 4GB use
225 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
226 in x16 and needs to work out PLTGOT[1] by using an address of
227 [x16,#-GOT_ENTRY_SIZE]. */
228 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
230 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
231 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
233 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
234 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
236 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
237 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
239 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
240 0x1f, 0x20, 0x03, 0xd5, /* nop */
241 0x1f, 0x20, 0x03, 0xd5, /* nop */
242 0x1f, 0x20, 0x03, 0xd5, /* nop */
245 /* Per function entry in a procedure linkage table looks like this
246 if the distance between the PLTGOT and the PLT is < 4GB use
247 these PLT entries. */
248 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
250 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
252 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
253 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
255 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
256 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
258 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
261 static const bfd_byte
262 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
264 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
265 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
266 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
268 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
269 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
271 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
272 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
274 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
275 0x1f, 0x20, 0x03, 0xd5, /* nop */
276 0x1f, 0x20, 0x03, 0xd5, /* nop */
279 #define elf_info_to_howto elfNN_aarch64_info_to_howto
280 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
282 #define AARCH64_ELF_ABI_VERSION 0
284 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
285 #define ALL_ONES (~ (bfd_vma) 0)
287 /* Indexed by the bfd interal reloc enumerators.
288 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
291 static reloc_howto_type elfNN_aarch64_howto_table[] =
295 /* Basic data relocations. */
298 HOWTO (R_AARCH64_NULL, /* type */
300 3, /* size (0 = byte, 1 = short, 2 = long) */
302 FALSE, /* pc_relative */
304 complain_overflow_dont, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_AARCH64_NULL", /* name */
307 FALSE, /* partial_inplace */
310 FALSE), /* pcrel_offset */
312 HOWTO (R_AARCH64_NONE, /* type */
314 3, /* size (0 = byte, 1 = short, 2 = long) */
316 FALSE, /* pc_relative */
318 complain_overflow_dont, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_AARCH64_NONE", /* name */
321 FALSE, /* partial_inplace */
324 FALSE), /* pcrel_offset */
328 HOWTO64 (AARCH64_R (ABS64), /* type */
330 4, /* size (4 = long long) */
332 FALSE, /* pc_relative */
334 complain_overflow_unsigned, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 AARCH64_R_STR (ABS64), /* name */
337 FALSE, /* partial_inplace */
338 ALL_ONES, /* src_mask */
339 ALL_ONES, /* dst_mask */
340 FALSE), /* pcrel_offset */
343 HOWTO (AARCH64_R (ABS32), /* type */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
347 FALSE, /* pc_relative */
349 complain_overflow_unsigned, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 AARCH64_R_STR (ABS32), /* name */
352 FALSE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE), /* pcrel_offset */
358 HOWTO (AARCH64_R (ABS16), /* type */
360 1, /* size (0 = byte, 1 = short, 2 = long) */
362 FALSE, /* pc_relative */
364 complain_overflow_unsigned, /* complain_on_overflow */
365 bfd_elf_generic_reloc, /* special_function */
366 AARCH64_R_STR (ABS16), /* name */
367 FALSE, /* partial_inplace */
368 0xffff, /* src_mask */
369 0xffff, /* dst_mask */
370 FALSE), /* pcrel_offset */
372 /* .xword: (S+A-P) */
373 HOWTO64 (AARCH64_R (PREL64), /* type */
375 4, /* size (4 = long long) */
377 TRUE, /* pc_relative */
379 complain_overflow_signed, /* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 AARCH64_R_STR (PREL64), /* name */
382 FALSE, /* partial_inplace */
383 ALL_ONES, /* src_mask */
384 ALL_ONES, /* dst_mask */
385 TRUE), /* pcrel_offset */
388 HOWTO (AARCH64_R (PREL32), /* type */
390 2, /* size (0 = byte, 1 = short, 2 = long) */
392 TRUE, /* pc_relative */
394 complain_overflow_signed, /* complain_on_overflow */
395 bfd_elf_generic_reloc, /* special_function */
396 AARCH64_R_STR (PREL32), /* name */
397 FALSE, /* partial_inplace */
398 0xffffffff, /* src_mask */
399 0xffffffff, /* dst_mask */
400 TRUE), /* pcrel_offset */
403 HOWTO (AARCH64_R (PREL16), /* type */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
407 TRUE, /* pc_relative */
409 complain_overflow_signed, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 AARCH64_R_STR (PREL16), /* name */
412 FALSE, /* partial_inplace */
413 0xffff, /* src_mask */
414 0xffff, /* dst_mask */
415 TRUE), /* pcrel_offset */
417 /* Group relocations to create a 16, 32, 48 or 64 bit
418 unsigned data or abs address inline. */
420 /* MOVZ: ((S+A) >> 0) & 0xffff */
421 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
423 2, /* size (0 = byte, 1 = short, 2 = long) */
425 FALSE, /* pc_relative */
427 complain_overflow_unsigned, /* complain_on_overflow */
428 bfd_elf_generic_reloc, /* special_function */
429 AARCH64_R_STR (MOVW_UABS_G0), /* name */
430 FALSE, /* partial_inplace */
431 0xffff, /* src_mask */
432 0xffff, /* dst_mask */
433 FALSE), /* pcrel_offset */
435 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
436 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE, /* pc_relative */
442 complain_overflow_dont, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* special_function */
444 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
445 FALSE, /* partial_inplace */
446 0xffff, /* src_mask */
447 0xffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
450 /* MOVZ: ((S+A) >> 16) & 0xffff */
451 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
455 FALSE, /* pc_relative */
457 complain_overflow_unsigned, /* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 AARCH64_R_STR (MOVW_UABS_G1), /* name */
460 FALSE, /* partial_inplace */
461 0xffff, /* src_mask */
462 0xffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
465 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
466 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 FALSE, /* pc_relative */
472 complain_overflow_dont, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
475 FALSE, /* partial_inplace */
476 0xffff, /* src_mask */
477 0xffff, /* dst_mask */
478 FALSE), /* pcrel_offset */
480 /* MOVZ: ((S+A) >> 32) & 0xffff */
481 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
483 2, /* size (0 = byte, 1 = short, 2 = long) */
485 FALSE, /* pc_relative */
487 complain_overflow_unsigned, /* complain_on_overflow */
488 bfd_elf_generic_reloc, /* special_function */
489 AARCH64_R_STR (MOVW_UABS_G2), /* name */
490 FALSE, /* partial_inplace */
491 0xffff, /* src_mask */
492 0xffff, /* dst_mask */
493 FALSE), /* pcrel_offset */
495 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
496 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 FALSE, /* pc_relative */
502 complain_overflow_dont, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
505 FALSE, /* partial_inplace */
506 0xffff, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
510 /* MOVZ: ((S+A) >> 48) & 0xffff */
511 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
515 FALSE, /* pc_relative */
517 complain_overflow_unsigned, /* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 AARCH64_R_STR (MOVW_UABS_G3), /* name */
520 FALSE, /* partial_inplace */
521 0xffff, /* src_mask */
522 0xffff, /* dst_mask */
523 FALSE), /* pcrel_offset */
525 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
526 signed data or abs address inline. Will change instruction
527 to MOVN or MOVZ depending on sign of calculated value. */
529 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
530 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
532 2, /* size (0 = byte, 1 = short, 2 = long) */
534 FALSE, /* pc_relative */
536 complain_overflow_signed, /* complain_on_overflow */
537 bfd_elf_generic_reloc, /* special_function */
538 AARCH64_R_STR (MOVW_SABS_G0), /* name */
539 FALSE, /* partial_inplace */
540 0xffff, /* src_mask */
541 0xffff, /* dst_mask */
542 FALSE), /* pcrel_offset */
544 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
545 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
547 2, /* size (0 = byte, 1 = short, 2 = long) */
549 FALSE, /* pc_relative */
551 complain_overflow_signed, /* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 AARCH64_R_STR (MOVW_SABS_G1), /* name */
554 FALSE, /* partial_inplace */
555 0xffff, /* src_mask */
556 0xffff, /* dst_mask */
557 FALSE), /* pcrel_offset */
559 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
560 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
564 FALSE, /* pc_relative */
566 complain_overflow_signed, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 AARCH64_R_STR (MOVW_SABS_G2), /* name */
569 FALSE, /* partial_inplace */
570 0xffff, /* src_mask */
571 0xffff, /* dst_mask */
572 FALSE), /* pcrel_offset */
574 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
575 addresses: PG(x) is (x & ~0xfff). */
577 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
578 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
582 TRUE, /* pc_relative */
584 complain_overflow_signed, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 AARCH64_R_STR (LD_PREL_LO19), /* name */
587 FALSE, /* partial_inplace */
588 0x7ffff, /* src_mask */
589 0x7ffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
592 /* ADR: (S+A-P) & 0x1fffff */
593 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
595 2, /* size (0 = byte, 1 = short, 2 = long) */
597 TRUE, /* pc_relative */
599 complain_overflow_signed, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 AARCH64_R_STR (ADR_PREL_LO21), /* name */
602 FALSE, /* partial_inplace */
603 0x1fffff, /* src_mask */
604 0x1fffff, /* dst_mask */
605 TRUE), /* pcrel_offset */
607 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
608 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
612 TRUE, /* pc_relative */
614 complain_overflow_signed, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
617 FALSE, /* partial_inplace */
618 0x1fffff, /* src_mask */
619 0x1fffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
622 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
623 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
625 2, /* size (0 = byte, 1 = short, 2 = long) */
627 TRUE, /* pc_relative */
629 complain_overflow_dont, /* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
632 FALSE, /* partial_inplace */
633 0x1fffff, /* src_mask */
634 0x1fffff, /* dst_mask */
635 TRUE), /* pcrel_offset */
637 /* ADD: (S+A) & 0xfff [no overflow check] */
638 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
642 FALSE, /* pc_relative */
644 complain_overflow_dont, /* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
647 FALSE, /* partial_inplace */
648 0x3ffc00, /* src_mask */
649 0x3ffc00, /* dst_mask */
650 FALSE), /* pcrel_offset */
652 /* LD/ST8: (S+A) & 0xfff */
653 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE, /* pc_relative */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
662 FALSE, /* partial_inplace */
663 0xfff, /* src_mask */
664 0xfff, /* dst_mask */
665 FALSE), /* pcrel_offset */
667 /* Relocations for control-flow instructions. */
669 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
670 HOWTO (AARCH64_R (TSTBR14), /* type */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
674 TRUE, /* pc_relative */
676 complain_overflow_signed, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 AARCH64_R_STR (TSTBR14), /* name */
679 FALSE, /* partial_inplace */
680 0x3fff, /* src_mask */
681 0x3fff, /* dst_mask */
682 TRUE), /* pcrel_offset */
684 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
685 HOWTO (AARCH64_R (CONDBR19), /* type */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
689 TRUE, /* pc_relative */
691 complain_overflow_signed, /* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 AARCH64_R_STR (CONDBR19), /* name */
694 FALSE, /* partial_inplace */
695 0x7ffff, /* src_mask */
696 0x7ffff, /* dst_mask */
697 TRUE), /* pcrel_offset */
699 /* B: ((S+A-P) >> 2) & 0x3ffffff */
700 HOWTO (AARCH64_R (JUMP26), /* type */
702 2, /* size (0 = byte, 1 = short, 2 = long) */
704 TRUE, /* pc_relative */
706 complain_overflow_signed, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 AARCH64_R_STR (JUMP26), /* name */
709 FALSE, /* partial_inplace */
710 0x3ffffff, /* src_mask */
711 0x3ffffff, /* dst_mask */
712 TRUE), /* pcrel_offset */
714 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
715 HOWTO (AARCH64_R (CALL26), /* type */
717 2, /* size (0 = byte, 1 = short, 2 = long) */
719 TRUE, /* pc_relative */
721 complain_overflow_signed, /* complain_on_overflow */
722 bfd_elf_generic_reloc, /* special_function */
723 AARCH64_R_STR (CALL26), /* name */
724 FALSE, /* partial_inplace */
725 0x3ffffff, /* src_mask */
726 0x3ffffff, /* dst_mask */
727 TRUE), /* pcrel_offset */
729 /* LD/ST16: (S+A) & 0xffe */
730 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
732 2, /* size (0 = byte, 1 = short, 2 = long) */
734 FALSE, /* pc_relative */
736 complain_overflow_dont, /* complain_on_overflow */
737 bfd_elf_generic_reloc, /* special_function */
738 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
739 FALSE, /* partial_inplace */
740 0xffe, /* src_mask */
741 0xffe, /* dst_mask */
742 FALSE), /* pcrel_offset */
744 /* LD/ST32: (S+A) & 0xffc */
745 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
749 FALSE, /* pc_relative */
751 complain_overflow_dont, /* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
754 FALSE, /* partial_inplace */
755 0xffc, /* src_mask */
756 0xffc, /* dst_mask */
757 FALSE), /* pcrel_offset */
759 /* LD/ST64: (S+A) & 0xff8 */
760 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
764 FALSE, /* pc_relative */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
769 FALSE, /* partial_inplace */
770 0xff8, /* src_mask */
771 0xff8, /* dst_mask */
772 FALSE), /* pcrel_offset */
774 /* LD/ST128: (S+A) & 0xff0 */
775 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
777 2, /* size (0 = byte, 1 = short, 2 = long) */
779 FALSE, /* pc_relative */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
784 FALSE, /* partial_inplace */
785 0xff0, /* src_mask */
786 0xff0, /* dst_mask */
787 FALSE), /* pcrel_offset */
789 /* Set a load-literal immediate field to bits
790 0x1FFFFC of G(S)-P */
791 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
793 2, /* size (0 = byte,1 = short,2 = long) */
795 TRUE, /* pc_relative */
797 complain_overflow_signed, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 AARCH64_R_STR (GOT_LD_PREL19), /* name */
800 FALSE, /* partial_inplace */
801 0xffffe0, /* src_mask */
802 0xffffe0, /* dst_mask */
803 TRUE), /* pcrel_offset */
805 /* Get to the page for the GOT entry for the symbol
806 (G(S) - P) using an ADRP instruction. */
807 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
811 TRUE, /* pc_relative */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
816 FALSE, /* partial_inplace */
817 0x1fffff, /* src_mask */
818 0x1fffff, /* dst_mask */
819 TRUE), /* pcrel_offset */
821 /* LD64: GOT offset G(S) & 0xff8 */
822 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
826 FALSE, /* pc_relative */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
831 FALSE, /* partial_inplace */
832 0xff8, /* src_mask */
833 0xff8, /* dst_mask */
834 FALSE), /* pcrel_offset */
836 /* LD32: GOT offset G(S) & 0xffc */
837 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
839 2, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE, /* pc_relative */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
846 FALSE, /* partial_inplace */
847 0xffc, /* src_mask */
848 0xffc, /* dst_mask */
849 FALSE), /* pcrel_offset */
851 /* Get to the page for the GOT entry for the symbol
852 (G(S) - P) using an ADRP instruction. */
853 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
855 2, /* size (0 = byte, 1 = short, 2 = long) */
857 TRUE, /* pc_relative */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
862 FALSE, /* partial_inplace */
863 0x1fffff, /* src_mask */
864 0x1fffff, /* dst_mask */
865 TRUE), /* pcrel_offset */
867 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
869 2, /* size (0 = byte, 1 = short, 2 = long) */
871 TRUE, /* pc_relative */
873 complain_overflow_dont, /* complain_on_overflow */
874 bfd_elf_generic_reloc, /* special_function */
875 AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
876 FALSE, /* partial_inplace */
877 0x1fffff, /* src_mask */
878 0x1fffff, /* dst_mask */
879 TRUE), /* pcrel_offset */
881 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
882 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
884 2, /* size (0 = byte, 1 = short, 2 = long) */
886 FALSE, /* pc_relative */
888 complain_overflow_dont, /* complain_on_overflow */
889 bfd_elf_generic_reloc, /* special_function */
890 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
891 FALSE, /* partial_inplace */
892 0xfff, /* src_mask */
893 0xfff, /* dst_mask */
894 FALSE), /* pcrel_offset */
896 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
898 2, /* size (0 = byte, 1 = short, 2 = long) */
900 FALSE, /* pc_relative */
902 complain_overflow_dont, /* complain_on_overflow */
903 bfd_elf_generic_reloc, /* special_function */
904 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
905 FALSE, /* partial_inplace */
906 0xffff, /* src_mask */
907 0xffff, /* dst_mask */
908 FALSE), /* pcrel_offset */
910 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
914 FALSE, /* pc_relative */
916 complain_overflow_dont, /* complain_on_overflow */
917 bfd_elf_generic_reloc, /* special_function */
918 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
919 FALSE, /* partial_inplace */
920 0xffff, /* src_mask */
921 0xffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
924 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
926 2, /* size (0 = byte, 1 = short, 2 = long) */
928 FALSE, /* pc_relative */
930 complain_overflow_dont, /* complain_on_overflow */
931 bfd_elf_generic_reloc, /* special_function */
932 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
933 FALSE, /* partial_inplace */
934 0x1fffff, /* src_mask */
935 0x1fffff, /* dst_mask */
936 FALSE), /* pcrel_offset */
938 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
940 2, /* size (0 = byte, 1 = short, 2 = long) */
942 FALSE, /* pc_relative */
944 complain_overflow_dont, /* complain_on_overflow */
945 bfd_elf_generic_reloc, /* special_function */
946 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
947 FALSE, /* partial_inplace */
948 0xff8, /* src_mask */
949 0xff8, /* dst_mask */
950 FALSE), /* pcrel_offset */
952 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
954 2, /* size (0 = byte, 1 = short, 2 = long) */
956 FALSE, /* pc_relative */
958 complain_overflow_dont, /* complain_on_overflow */
959 bfd_elf_generic_reloc, /* special_function */
960 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
961 FALSE, /* partial_inplace */
962 0xffc, /* src_mask */
963 0xffc, /* dst_mask */
964 FALSE), /* pcrel_offset */
966 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
970 FALSE, /* pc_relative */
972 complain_overflow_dont, /* complain_on_overflow */
973 bfd_elf_generic_reloc, /* special_function */
974 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
975 FALSE, /* partial_inplace */
976 0x1ffffc, /* src_mask */
977 0x1ffffc, /* dst_mask */
978 FALSE), /* pcrel_offset */
980 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
982 2, /* size (0 = byte, 1 = short, 2 = long) */
984 FALSE, /* pc_relative */
986 complain_overflow_unsigned, /* complain_on_overflow */
987 bfd_elf_generic_reloc, /* special_function */
988 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
989 FALSE, /* partial_inplace */
990 0xffff, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
994 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
996 2, /* size (0 = byte, 1 = short, 2 = long) */
998 FALSE, /* pc_relative */
1000 complain_overflow_dont, /* complain_on_overflow */
1001 bfd_elf_generic_reloc, /* special_function */
1002 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
1003 FALSE, /* partial_inplace */
1004 0xffff, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1008 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1009 16, /* rightshift */
1010 2, /* size (0 = byte, 1 = short, 2 = long) */
1012 FALSE, /* pc_relative */
1014 complain_overflow_dont, /* complain_on_overflow */
1015 bfd_elf_generic_reloc, /* special_function */
1016 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1017 FALSE, /* partial_inplace */
1018 0xffff, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1022 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1024 2, /* size (0 = byte, 1 = short, 2 = long) */
1026 FALSE, /* pc_relative */
1028 complain_overflow_dont, /* complain_on_overflow */
1029 bfd_elf_generic_reloc, /* special_function */
1030 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1031 FALSE, /* partial_inplace */
1032 0xffff, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1036 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1038 2, /* size (0 = byte, 1 = short, 2 = long) */
1040 FALSE, /* pc_relative */
1042 complain_overflow_dont, /* complain_on_overflow */
1043 bfd_elf_generic_reloc, /* special_function */
1044 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1045 FALSE, /* partial_inplace */
1046 0xffff, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1050 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1051 12, /* rightshift */
1052 2, /* size (0 = byte, 1 = short, 2 = long) */
1054 FALSE, /* pc_relative */
1056 complain_overflow_unsigned, /* complain_on_overflow */
1057 bfd_elf_generic_reloc, /* special_function */
1058 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1059 FALSE, /* partial_inplace */
1060 0xfff, /* src_mask */
1061 0xfff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1064 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1066 2, /* size (0 = byte, 1 = short, 2 = long) */
1068 FALSE, /* pc_relative */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 bfd_elf_generic_reloc, /* special_function */
1072 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1073 FALSE, /* partial_inplace */
1074 0xfff, /* src_mask */
1075 0xfff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1078 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1080 2, /* size (0 = byte, 1 = short, 2 = long) */
1082 FALSE, /* pc_relative */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 bfd_elf_generic_reloc, /* special_function */
1086 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1087 FALSE, /* partial_inplace */
1088 0xfff, /* src_mask */
1089 0xfff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1092 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1094 2, /* size (0 = byte, 1 = short, 2 = long) */
1096 TRUE, /* pc_relative */
1098 complain_overflow_dont, /* complain_on_overflow */
1099 bfd_elf_generic_reloc, /* special_function */
1100 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1101 FALSE, /* partial_inplace */
1102 0x0ffffe0, /* src_mask */
1103 0x0ffffe0, /* dst_mask */
1104 TRUE), /* pcrel_offset */
1106 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1108 2, /* size (0 = byte, 1 = short, 2 = long) */
1110 TRUE, /* pc_relative */
1112 complain_overflow_dont, /* complain_on_overflow */
1113 bfd_elf_generic_reloc, /* special_function */
1114 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1115 FALSE, /* partial_inplace */
1116 0x1fffff, /* src_mask */
1117 0x1fffff, /* dst_mask */
1118 TRUE), /* pcrel_offset */
1120 /* Get to the page for the GOT entry for the symbol
1121 (G(S) - P) using an ADRP instruction. */
1122 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1123 12, /* rightshift */
1124 2, /* size (0 = byte, 1 = short, 2 = long) */
1126 TRUE, /* pc_relative */
1128 complain_overflow_dont, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1131 FALSE, /* partial_inplace */
1132 0x1fffff, /* src_mask */
1133 0x1fffff, /* dst_mask */
1134 TRUE), /* pcrel_offset */
1136 /* LD64: GOT offset G(S) & 0xff8. */
1137 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1139 2, /* size (0 = byte, 1 = short, 2 = long) */
1141 FALSE, /* pc_relative */
1143 complain_overflow_dont, /* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1146 FALSE, /* partial_inplace */
1147 0xff8, /* src_mask */
1148 0xff8, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1151 /* LD32: GOT offset G(S) & 0xffc. */
1152 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1154 2, /* size (0 = byte, 1 = short, 2 = long) */
1156 FALSE, /* pc_relative */
1158 complain_overflow_dont, /* complain_on_overflow */
1159 bfd_elf_generic_reloc, /* special_function */
1160 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1161 FALSE, /* partial_inplace */
1162 0xffc, /* src_mask */
1163 0xffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1166 /* ADD: GOT offset G(S) & 0xfff. */
1167 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1169 2, /* size (0 = byte, 1 = short, 2 = long) */
1171 FALSE, /* pc_relative */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 bfd_elf_generic_reloc, /* special_function */
1175 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1176 FALSE, /* partial_inplace */
1177 0xfff, /* src_mask */
1178 0xfff, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1181 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1182 16, /* rightshift */
1183 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 FALSE, /* pc_relative */
1187 complain_overflow_dont, /* complain_on_overflow */
1188 bfd_elf_generic_reloc, /* special_function */
1189 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1190 FALSE, /* partial_inplace */
1191 0xffff, /* src_mask */
1192 0xffff, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1195 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1197 2, /* size (0 = byte, 1 = short, 2 = long) */
1199 FALSE, /* pc_relative */
1201 complain_overflow_dont, /* complain_on_overflow */
1202 bfd_elf_generic_reloc, /* special_function */
1203 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1204 FALSE, /* partial_inplace */
1205 0xffff, /* src_mask */
1206 0xffff, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1209 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1211 2, /* size (0 = byte, 1 = short, 2 = long) */
1213 FALSE, /* pc_relative */
1215 complain_overflow_dont, /* complain_on_overflow */
1216 bfd_elf_generic_reloc, /* special_function */
1217 AARCH64_R_STR (TLSDESC_LDR), /* name */
1218 FALSE, /* partial_inplace */
1221 FALSE), /* pcrel_offset */
1223 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1225 2, /* size (0 = byte, 1 = short, 2 = long) */
1227 FALSE, /* pc_relative */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 bfd_elf_generic_reloc, /* special_function */
1231 AARCH64_R_STR (TLSDESC_ADD), /* name */
1232 FALSE, /* partial_inplace */
1235 FALSE), /* pcrel_offset */
1237 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1239 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 FALSE, /* pc_relative */
1243 complain_overflow_dont, /* complain_on_overflow */
1244 bfd_elf_generic_reloc, /* special_function */
1245 AARCH64_R_STR (TLSDESC_CALL), /* name */
1246 FALSE, /* partial_inplace */
1249 FALSE), /* pcrel_offset */
1251 HOWTO (AARCH64_R (COPY), /* type */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1255 FALSE, /* pc_relative */
1257 complain_overflow_bitfield, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 AARCH64_R_STR (COPY), /* name */
1260 TRUE, /* partial_inplace */
1261 0xffffffff, /* src_mask */
1262 0xffffffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1265 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 FALSE, /* pc_relative */
1271 complain_overflow_bitfield, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 AARCH64_R_STR (GLOB_DAT), /* name */
1274 TRUE, /* partial_inplace */
1275 0xffffffff, /* src_mask */
1276 0xffffffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1279 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 FALSE, /* pc_relative */
1285 complain_overflow_bitfield, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 AARCH64_R_STR (JUMP_SLOT), /* name */
1288 TRUE, /* partial_inplace */
1289 0xffffffff, /* src_mask */
1290 0xffffffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1293 HOWTO (AARCH64_R (RELATIVE), /* type */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 FALSE, /* pc_relative */
1299 complain_overflow_bitfield, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 AARCH64_R_STR (RELATIVE), /* name */
1302 TRUE, /* partial_inplace */
1303 ALL_ONES, /* src_mask */
1304 ALL_ONES, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1307 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 FALSE, /* pc_relative */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1316 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1318 AARCH64_R_STR (TLS_DTPMOD), /* name */
1320 FALSE, /* partial_inplace */
1322 ALL_ONES, /* dst_mask */
1323 FALSE), /* pc_reloffset */
1325 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1327 2, /* size (0 = byte, 1 = short, 2 = long) */
1329 FALSE, /* pc_relative */
1331 complain_overflow_dont, /* complain_on_overflow */
1332 bfd_elf_generic_reloc, /* special_function */
1334 AARCH64_R_STR (TLS_DTPREL64), /* name */
1336 AARCH64_R_STR (TLS_DTPREL), /* name */
1338 FALSE, /* partial_inplace */
1340 ALL_ONES, /* dst_mask */
1341 FALSE), /* pcrel_offset */
1343 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1345 2, /* size (0 = byte, 1 = short, 2 = long) */
1347 FALSE, /* pc_relative */
1349 complain_overflow_dont, /* complain_on_overflow */
1350 bfd_elf_generic_reloc, /* special_function */
1352 AARCH64_R_STR (TLS_TPREL64), /* name */
1354 AARCH64_R_STR (TLS_TPREL), /* name */
1356 FALSE, /* partial_inplace */
1358 ALL_ONES, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1361 HOWTO (AARCH64_R (TLSDESC), /* type */
1363 2, /* size (0 = byte, 1 = short, 2 = long) */
1365 FALSE, /* pc_relative */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 bfd_elf_generic_reloc, /* special_function */
1369 AARCH64_R_STR (TLSDESC), /* name */
1370 FALSE, /* partial_inplace */
1372 ALL_ONES, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1375 HOWTO (AARCH64_R (IRELATIVE), /* type */
1377 2, /* size (0 = byte, 1 = short, 2 = long) */
1379 FALSE, /* pc_relative */
1381 complain_overflow_bitfield, /* complain_on_overflow */
1382 bfd_elf_generic_reloc, /* special_function */
1383 AARCH64_R_STR (IRELATIVE), /* name */
1384 FALSE, /* partial_inplace */
1386 ALL_ONES, /* dst_mask */
1387 FALSE), /* pcrel_offset */
1392 static reloc_howto_type elfNN_aarch64_howto_none =
1393 HOWTO (R_AARCH64_NONE, /* type */
1395 3, /* size (0 = byte, 1 = short, 2 = long) */
1397 FALSE, /* pc_relative */
1399 complain_overflow_dont,/* complain_on_overflow */
1400 bfd_elf_generic_reloc, /* special_function */
1401 "R_AARCH64_NONE", /* name */
1402 FALSE, /* partial_inplace */
1405 FALSE); /* pcrel_offset */
1407 /* Given HOWTO, return the bfd internal relocation enumerator. */
1409 static bfd_reloc_code_real_type
1410 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1413 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1414 const ptrdiff_t offset
1415 = howto - elfNN_aarch64_howto_table;
1417 if (offset > 0 && offset < size - 1)
1418 return BFD_RELOC_AARCH64_RELOC_START + offset;
1420 if (howto == &elfNN_aarch64_howto_none)
1421 return BFD_RELOC_AARCH64_NONE;
1423 return BFD_RELOC_AARCH64_RELOC_START;
1426 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1428 static bfd_reloc_code_real_type
1429 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1431 static bfd_boolean initialized_p = FALSE;
1432 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1433 static unsigned int offsets[R_AARCH64_end];
1435 if (initialized_p == FALSE)
1439 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1440 if (elfNN_aarch64_howto_table[i].type != 0)
1441 offsets[elfNN_aarch64_howto_table[i].type] = i;
1443 initialized_p = TRUE;
1446 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1447 return BFD_RELOC_AARCH64_NONE;
1449 /* PR 17512: file: b371e70a. */
1450 if (r_type >= R_AARCH64_end)
1452 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type);
1453 bfd_set_error (bfd_error_bad_value);
1454 return BFD_RELOC_AARCH64_NONE;
1457 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1460 struct elf_aarch64_reloc_map
1462 bfd_reloc_code_real_type from;
1463 bfd_reloc_code_real_type to;
1466 /* Map bfd generic reloc to AArch64-specific reloc. */
1467 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1469 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1471 /* Basic data relocations. */
1472 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1473 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1474 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1475 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1476 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1477 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1478 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1481 /* Given the bfd internal relocation enumerator in CODE, return the
1482 corresponding howto entry. */
1484 static reloc_howto_type *
1485 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1489 /* Convert bfd generic reloc to AArch64-specific reloc. */
1490 if (code < BFD_RELOC_AARCH64_RELOC_START
1491 || code > BFD_RELOC_AARCH64_RELOC_END)
1492 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1493 if (elf_aarch64_reloc_map[i].from == code)
1495 code = elf_aarch64_reloc_map[i].to;
1499 if (code > BFD_RELOC_AARCH64_RELOC_START
1500 && code < BFD_RELOC_AARCH64_RELOC_END)
1501 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1502 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1504 if (code == BFD_RELOC_AARCH64_NONE)
1505 return &elfNN_aarch64_howto_none;
1510 static reloc_howto_type *
1511 elfNN_aarch64_howto_from_type (unsigned int r_type)
1513 bfd_reloc_code_real_type val;
1514 reloc_howto_type *howto;
1519 bfd_set_error (bfd_error_bad_value);
1524 if (r_type == R_AARCH64_NONE)
1525 return &elfNN_aarch64_howto_none;
1527 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1528 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1533 bfd_set_error (bfd_error_bad_value);
1538 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1539 Elf_Internal_Rela *elf_reloc)
1541 unsigned int r_type;
1543 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1544 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1547 static reloc_howto_type *
1548 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1549 bfd_reloc_code_real_type code)
1551 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1556 bfd_set_error (bfd_error_bad_value);
1560 static reloc_howto_type *
1561 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1566 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1567 if (elfNN_aarch64_howto_table[i].name != NULL
1568 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1569 return &elfNN_aarch64_howto_table[i];
1574 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
1575 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1576 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
1577 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1579 /* The linker script knows the section names for placement.
1580 The entry_names are used to do simple name mangling on the stubs.
1581 Given a function name, and its type, the stub can be found. The
1582 name can be changed. The only requirement is the %s be present. */
1583 #define STUB_ENTRY_NAME "__%s_veneer"
1585 /* The name of the dynamic interpreter. This is put in the .interp
1587 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1589 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1590 (((1 << 25) - 1) << 2)
1591 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1594 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1595 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1598 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1600 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1601 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
1605 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
1607 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
1608 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
1609 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
1612 static const uint32_t aarch64_adrp_branch_stub [] =
1614 0x90000010, /* adrp ip0, X */
1615 /* R_AARCH64_ADR_HI21_PCREL(X) */
1616 0x91000210, /* add ip0, ip0, :lo12:X */
1617 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
1618 0xd61f0200, /* br ip0 */
1621 static const uint32_t aarch64_long_branch_stub[] =
1624 0x58000090, /* ldr ip0, 1f */
1626 0x18000090, /* ldr wip0, 1f */
1628 0x10000011, /* adr ip1, #0 */
1629 0x8b110210, /* add ip0, ip0, ip1 */
1630 0xd61f0200, /* br ip0 */
1631 0x00000000, /* 1: .xword or .word
1632 R_AARCH64_PRELNN(X) + 12
1637 static const uint32_t aarch64_erratum_835769_stub[] =
1639 0x00000000, /* Placeholder for multiply accumulate. */
1640 0x14000000, /* b <label> */
1643 /* Section name for stubs is the associated section name plus this
1645 #define STUB_SUFFIX ".stub"
1647 enum elf_aarch64_stub_type
1650 aarch64_stub_adrp_branch,
1651 aarch64_stub_long_branch,
1652 aarch64_stub_erratum_835769_veneer,
1655 struct elf_aarch64_stub_hash_entry
1657 /* Base hash table entry structure. */
1658 struct bfd_hash_entry root;
1660 /* The stub section. */
1663 /* Offset within stub_sec of the beginning of this stub. */
1664 bfd_vma stub_offset;
1666 /* Given the symbol's value and its section we can determine its final
1667 value when building the stubs (so the stub knows where to jump). */
1668 bfd_vma target_value;
1669 asection *target_section;
1671 enum elf_aarch64_stub_type stub_type;
1673 /* The symbol table entry, if any, that this was derived from. */
1674 struct elf_aarch64_link_hash_entry *h;
1676 /* Destination symbol type */
1677 unsigned char st_type;
1679 /* Where this stub is being called from, or, in the case of combined
1680 stub sections, the first input section in the group. */
1683 /* The name for the local symbol at the start of this stub. The
1684 stub name in the hash table has to be unique; this does not, so
1685 it can be friendlier. */
1688 /* The instruction which caused this stub to be generated (only valid for
1689 erratum 835769 workaround stubs at present). */
1690 uint32_t veneered_insn;
1693 /* Used to build a map of a section. This is required for mixed-endian
1696 typedef struct elf_elf_section_map
1701 elf_aarch64_section_map;
1704 typedef struct _aarch64_elf_section_data
1706 struct bfd_elf_section_data elf;
1707 unsigned int mapcount;
1708 unsigned int mapsize;
1709 elf_aarch64_section_map *map;
1711 _aarch64_elf_section_data;
1713 #define elf_aarch64_section_data(sec) \
1714 ((_aarch64_elf_section_data *) elf_section_data (sec))
1716 /* The size of the thread control block which is defined to be two pointers. */
1717 #define TCB_SIZE (ARCH_SIZE/8)*2
1719 struct elf_aarch64_local_symbol
1721 unsigned int got_type;
1722 bfd_signed_vma got_refcount;
1725 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1726 offset is from the end of the jump table and reserved entries
1729 The magic value (bfd_vma) -1 indicates that an offset has not be
1731 bfd_vma tlsdesc_got_jump_table_offset;
1734 struct elf_aarch64_obj_tdata
1736 struct elf_obj_tdata root;
1738 /* local symbol descriptors */
1739 struct elf_aarch64_local_symbol *locals;
1741 /* Zero to warn when linking objects with incompatible enum sizes. */
1742 int no_enum_size_warning;
1744 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1745 int no_wchar_size_warning;
1748 #define elf_aarch64_tdata(bfd) \
1749 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1751 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1753 #define is_aarch64_elf(bfd) \
1754 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1755 && elf_tdata (bfd) != NULL \
1756 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1759 elfNN_aarch64_mkobject (bfd *abfd)
1761 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1765 #define elf_aarch64_hash_entry(ent) \
1766 ((struct elf_aarch64_link_hash_entry *)(ent))
1768 #define GOT_UNKNOWN 0
1769 #define GOT_NORMAL 1
1770 #define GOT_TLS_GD 2
1771 #define GOT_TLS_IE 4
1772 #define GOT_TLSDESC_GD 8
1774 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1776 /* AArch64 ELF linker hash entry. */
1777 struct elf_aarch64_link_hash_entry
1779 struct elf_link_hash_entry root;
1781 /* Track dynamic relocs copied for this symbol. */
1782 struct elf_dyn_relocs *dyn_relocs;
1784 /* Since PLT entries have variable size, we need to record the
1785 index into .got.plt instead of recomputing it from the PLT
1787 bfd_signed_vma plt_got_offset;
1789 /* Bit mask representing the type of GOT entry(s) if any required by
1791 unsigned int got_type;
1793 /* A pointer to the most recently used stub hash entry against this
1795 struct elf_aarch64_stub_hash_entry *stub_cache;
1797 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1798 is from the end of the jump table and reserved entries within the PLTGOT.
1800 The magic value (bfd_vma) -1 indicates that an offset has not
1802 bfd_vma tlsdesc_got_jump_table_offset;
1806 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1808 unsigned long r_symndx)
1811 return elf_aarch64_hash_entry (h)->got_type;
1813 if (! elf_aarch64_locals (abfd))
1816 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1819 /* Get the AArch64 elf linker hash table from a link_info structure. */
1820 #define elf_aarch64_hash_table(info) \
1821 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1823 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1824 ((struct elf_aarch64_stub_hash_entry *) \
1825 bfd_hash_lookup ((table), (string), (create), (copy)))
1827 /* AArch64 ELF linker hash table. */
1828 struct elf_aarch64_link_hash_table
1830 /* The main hash table. */
1831 struct elf_link_hash_table root;
1833 /* Nonzero to force PIC branch veneers. */
1836 /* Fix erratum 835769. */
1837 int fix_erratum_835769;
1839 /* The number of bytes in the initial entry in the PLT. */
1840 bfd_size_type plt_header_size;
1842 /* The number of bytes in the subsequent PLT etries. */
1843 bfd_size_type plt_entry_size;
1845 /* Short-cuts to get to dynamic linker sections. */
1849 /* Small local sym cache. */
1850 struct sym_cache sym_cache;
1852 /* For convenience in allocate_dynrelocs. */
1855 /* The amount of space used by the reserved portion of the sgotplt
1856 section, plus whatever space is used by the jump slots. */
1857 bfd_vma sgotplt_jump_table_size;
1859 /* The stub hash table. */
1860 struct bfd_hash_table stub_hash_table;
1862 /* Linker stub bfd. */
1865 /* Linker call-backs. */
1866 asection *(*add_stub_section) (const char *, asection *);
1867 void (*layout_sections_again) (void);
1869 /* Array to keep track of which stub sections have been created, and
1870 information on stub grouping. */
1873 /* This is the section to which stubs in the group will be
1876 /* The stub section. */
1880 /* Assorted information used by elfNN_aarch64_size_stubs. */
1881 unsigned int bfd_count;
1883 asection **input_list;
1885 /* The offset into splt of the PLT entry for the TLS descriptor
1886 resolver. Special values are 0, if not necessary (or not found
1887 to be necessary yet), and -1 if needed but not determined
1889 bfd_vma tlsdesc_plt;
1891 /* The GOT offset for the lazy trampoline. Communicated to the
1892 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
1893 indicates an offset is not allocated. */
1894 bfd_vma dt_tlsdesc_got;
1896 /* Used by local STT_GNU_IFUNC symbols. */
1897 htab_t loc_hash_table;
1898 void * loc_hash_memory;
1901 /* Create an entry in an AArch64 ELF linker hash table. */
1903 static struct bfd_hash_entry *
1904 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
1905 struct bfd_hash_table *table,
1908 struct elf_aarch64_link_hash_entry *ret =
1909 (struct elf_aarch64_link_hash_entry *) entry;
1911 /* Allocate the structure if it has not already been allocated by a
1914 ret = bfd_hash_allocate (table,
1915 sizeof (struct elf_aarch64_link_hash_entry));
1917 return (struct bfd_hash_entry *) ret;
1919 /* Call the allocation method of the superclass. */
1920 ret = ((struct elf_aarch64_link_hash_entry *)
1921 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1925 ret->dyn_relocs = NULL;
1926 ret->got_type = GOT_UNKNOWN;
1927 ret->plt_got_offset = (bfd_vma) - 1;
1928 ret->stub_cache = NULL;
1929 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
1932 return (struct bfd_hash_entry *) ret;
1935 /* Initialize an entry in the stub hash table. */
1937 static struct bfd_hash_entry *
1938 stub_hash_newfunc (struct bfd_hash_entry *entry,
1939 struct bfd_hash_table *table, const char *string)
1941 /* Allocate the structure if it has not already been allocated by a
1945 entry = bfd_hash_allocate (table,
1947 elf_aarch64_stub_hash_entry));
1952 /* Call the allocation method of the superclass. */
1953 entry = bfd_hash_newfunc (entry, table, string);
1956 struct elf_aarch64_stub_hash_entry *eh;
1958 /* Initialize the local fields. */
1959 eh = (struct elf_aarch64_stub_hash_entry *) entry;
1960 eh->stub_sec = NULL;
1961 eh->stub_offset = 0;
1962 eh->target_value = 0;
1963 eh->target_section = NULL;
1964 eh->stub_type = aarch64_stub_none;
1972 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1973 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1974 as global symbol. We reuse indx and dynstr_index for local symbol
1975 hash since they aren't used by global symbols in this backend. */
1978 elfNN_aarch64_local_htab_hash (const void *ptr)
1980 struct elf_link_hash_entry *h
1981 = (struct elf_link_hash_entry *) ptr;
1982 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1985 /* Compare local hash entries. */
1988 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
1990 struct elf_link_hash_entry *h1
1991 = (struct elf_link_hash_entry *) ptr1;
1992 struct elf_link_hash_entry *h2
1993 = (struct elf_link_hash_entry *) ptr2;
1995 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1998 /* Find and/or create a hash entry for local symbol. */
2000 static struct elf_link_hash_entry *
2001 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
2002 bfd *abfd, const Elf_Internal_Rela *rel,
2005 struct elf_aarch64_link_hash_entry e, *ret;
2006 asection *sec = abfd->sections;
2007 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2008 ELFNN_R_SYM (rel->r_info));
2011 e.root.indx = sec->id;
2012 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2013 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2014 create ? INSERT : NO_INSERT);
2021 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2025 ret = (struct elf_aarch64_link_hash_entry *)
2026 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2027 sizeof (struct elf_aarch64_link_hash_entry));
2030 memset (ret, 0, sizeof (*ret));
2031 ret->root.indx = sec->id;
2032 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2033 ret->root.dynindx = -1;
2039 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2042 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2043 struct elf_link_hash_entry *dir,
2044 struct elf_link_hash_entry *ind)
2046 struct elf_aarch64_link_hash_entry *edir, *eind;
2048 edir = (struct elf_aarch64_link_hash_entry *) dir;
2049 eind = (struct elf_aarch64_link_hash_entry *) ind;
2051 if (eind->dyn_relocs != NULL)
2053 if (edir->dyn_relocs != NULL)
2055 struct elf_dyn_relocs **pp;
2056 struct elf_dyn_relocs *p;
2058 /* Add reloc counts against the indirect sym to the direct sym
2059 list. Merge any entries against the same section. */
2060 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2062 struct elf_dyn_relocs *q;
2064 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2065 if (q->sec == p->sec)
2067 q->pc_count += p->pc_count;
2068 q->count += p->count;
2075 *pp = edir->dyn_relocs;
2078 edir->dyn_relocs = eind->dyn_relocs;
2079 eind->dyn_relocs = NULL;
2082 if (ind->root.type == bfd_link_hash_indirect)
2084 /* Copy over PLT info. */
2085 if (dir->got.refcount <= 0)
2087 edir->got_type = eind->got_type;
2088 eind->got_type = GOT_UNKNOWN;
2092 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2095 /* Destroy an AArch64 elf linker hash table. */
2098 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2100 struct elf_aarch64_link_hash_table *ret
2101 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2103 if (ret->loc_hash_table)
2104 htab_delete (ret->loc_hash_table);
2105 if (ret->loc_hash_memory)
2106 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2108 bfd_hash_table_free (&ret->stub_hash_table);
2109 _bfd_elf_link_hash_table_free (obfd);
2112 /* Create an AArch64 elf linker hash table. */
2114 static struct bfd_link_hash_table *
2115 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2117 struct elf_aarch64_link_hash_table *ret;
2118 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2120 ret = bfd_zmalloc (amt);
2124 if (!_bfd_elf_link_hash_table_init
2125 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2126 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2132 ret->plt_header_size = PLT_ENTRY_SIZE;
2133 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2135 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2137 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2138 sizeof (struct elf_aarch64_stub_hash_entry)))
2140 _bfd_elf_link_hash_table_free (abfd);
2144 ret->loc_hash_table = htab_try_create (1024,
2145 elfNN_aarch64_local_htab_hash,
2146 elfNN_aarch64_local_htab_eq,
2148 ret->loc_hash_memory = objalloc_create ();
2149 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2151 elfNN_aarch64_link_hash_table_free (abfd);
2154 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2156 return &ret->root.root;
2160 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2161 bfd_vma offset, bfd_vma value)
2163 reloc_howto_type *howto;
2166 howto = elfNN_aarch64_howto_from_type (r_type);
2167 place = (input_section->output_section->vma + input_section->output_offset
2170 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2171 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2172 return _bfd_aarch64_elf_put_addend (input_bfd,
2173 input_section->contents + offset, r_type,
2177 static enum elf_aarch64_stub_type
2178 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2180 if (aarch64_valid_for_adrp_p (value, place))
2181 return aarch64_stub_adrp_branch;
2182 return aarch64_stub_long_branch;
2185 /* Determine the type of stub needed, if any, for a call. */
2187 static enum elf_aarch64_stub_type
2188 aarch64_type_of_stub (struct bfd_link_info *info,
2189 asection *input_sec,
2190 const Elf_Internal_Rela *rel,
2191 unsigned char st_type,
2192 struct elf_aarch64_link_hash_entry *hash,
2193 bfd_vma destination)
2196 bfd_signed_vma branch_offset;
2197 unsigned int r_type;
2198 struct elf_aarch64_link_hash_table *globals;
2199 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2200 bfd_boolean via_plt_p;
2202 if (st_type != STT_FUNC)
2205 globals = elf_aarch64_hash_table (info);
2206 via_plt_p = (globals->root.splt != NULL && hash != NULL
2207 && hash->root.plt.offset != (bfd_vma) - 1);
2212 /* Determine where the call point is. */
2213 location = (input_sec->output_offset
2214 + input_sec->output_section->vma + rel->r_offset);
2216 branch_offset = (bfd_signed_vma) (destination - location);
2218 r_type = ELFNN_R_TYPE (rel->r_info);
2220 /* We don't want to redirect any old unconditional jump in this way,
2221 only one which is being used for a sibcall, where it is
2222 acceptable for the IP0 and IP1 registers to be clobbered. */
2223 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2224 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2225 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2227 stub_type = aarch64_stub_long_branch;
2233 /* Build a name for an entry in the stub hash table. */
2236 elfNN_aarch64_stub_name (const asection *input_section,
2237 const asection *sym_sec,
2238 const struct elf_aarch64_link_hash_entry *hash,
2239 const Elf_Internal_Rela *rel)
2246 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2247 stub_name = bfd_malloc (len);
2248 if (stub_name != NULL)
2249 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2250 (unsigned int) input_section->id,
2251 hash->root.root.root.string,
2256 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2257 stub_name = bfd_malloc (len);
2258 if (stub_name != NULL)
2259 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2260 (unsigned int) input_section->id,
2261 (unsigned int) sym_sec->id,
2262 (unsigned int) ELFNN_R_SYM (rel->r_info),
2269 /* Look up an entry in the stub hash. Stub entries are cached because
2270 creating the stub name takes a bit of time. */
2272 static struct elf_aarch64_stub_hash_entry *
2273 elfNN_aarch64_get_stub_entry (const asection *input_section,
2274 const asection *sym_sec,
2275 struct elf_link_hash_entry *hash,
2276 const Elf_Internal_Rela *rel,
2277 struct elf_aarch64_link_hash_table *htab)
2279 struct elf_aarch64_stub_hash_entry *stub_entry;
2280 struct elf_aarch64_link_hash_entry *h =
2281 (struct elf_aarch64_link_hash_entry *) hash;
2282 const asection *id_sec;
2284 if ((input_section->flags & SEC_CODE) == 0)
2287 /* If this input section is part of a group of sections sharing one
2288 stub section, then use the id of the first section in the group.
2289 Stub names need to include a section id, as there may well be
2290 more than one stub used to reach say, printf, and we need to
2291 distinguish between them. */
2292 id_sec = htab->stub_group[input_section->id].link_sec;
2294 if (h != NULL && h->stub_cache != NULL
2295 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2297 stub_entry = h->stub_cache;
2303 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2304 if (stub_name == NULL)
2307 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2308 stub_name, FALSE, FALSE);
2310 h->stub_cache = stub_entry;
2319 /* Create a stub section. */
2322 _bfd_aarch64_create_stub_section (asection *section,
2323 struct elf_aarch64_link_hash_table *htab)
2329 namelen = strlen (section->name);
2330 len = namelen + sizeof (STUB_SUFFIX);
2331 s_name = bfd_alloc (htab->stub_bfd, len);
2335 memcpy (s_name, section->name, namelen);
2336 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2337 return (*htab->add_stub_section) (s_name, section);
2341 /* Find or create a stub section in the stub group for an input
2345 _bfd_aarch64_create_or_find_stub_sec (asection *section,
2346 struct elf_aarch64_link_hash_table *htab)
2351 link_sec = htab->stub_group[section->id].link_sec;
2352 BFD_ASSERT (link_sec != NULL);
2353 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2354 if (stub_sec == NULL)
2356 stub_sec = _bfd_aarch64_create_stub_section (link_sec, htab);
2357 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2363 /* Add a new stub entry in the stub group associated with an input
2364 section to the stub hash. Not all fields of the new stub entry are
2367 static struct elf_aarch64_stub_hash_entry *
2368 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name,
2370 struct elf_aarch64_link_hash_table *htab)
2374 struct elf_aarch64_stub_hash_entry *stub_entry;
2376 link_sec = htab->stub_group[section->id].link_sec;
2377 stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab);
2379 /* Enter this entry into the linker stub hash table. */
2380 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2382 if (stub_entry == NULL)
2384 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2385 section->owner, stub_name);
2389 stub_entry->stub_sec = stub_sec;
2390 stub_entry->stub_offset = 0;
2391 stub_entry->id_sec = link_sec;
2397 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2398 void *in_arg ATTRIBUTE_UNUSED)
2400 struct elf_aarch64_stub_hash_entry *stub_entry;
2405 bfd_vma veneered_insn_loc;
2406 bfd_vma veneer_entry_loc;
2407 bfd_signed_vma branch_offset = 0;
2408 unsigned int template_size;
2409 const uint32_t *template;
2412 /* Massage our args to the form they really have. */
2413 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2415 stub_sec = stub_entry->stub_sec;
2417 /* Make a note of the offset within the stubs for this entry. */
2418 stub_entry->stub_offset = stub_sec->size;
2419 loc = stub_sec->contents + stub_entry->stub_offset;
2421 stub_bfd = stub_sec->owner;
2423 /* This is the address of the stub destination. */
2424 sym_value = (stub_entry->target_value
2425 + stub_entry->target_section->output_offset
2426 + stub_entry->target_section->output_section->vma);
2428 if (stub_entry->stub_type == aarch64_stub_long_branch)
2430 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2431 + stub_sec->output_offset);
2433 /* See if we can relax the stub. */
2434 if (aarch64_valid_for_adrp_p (sym_value, place))
2435 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2438 switch (stub_entry->stub_type)
2440 case aarch64_stub_adrp_branch:
2441 template = aarch64_adrp_branch_stub;
2442 template_size = sizeof (aarch64_adrp_branch_stub);
2444 case aarch64_stub_long_branch:
2445 template = aarch64_long_branch_stub;
2446 template_size = sizeof (aarch64_long_branch_stub);
2448 case aarch64_stub_erratum_835769_veneer:
2449 template = aarch64_erratum_835769_stub;
2450 template_size = sizeof (aarch64_erratum_835769_stub);
2456 for (i = 0; i < (template_size / sizeof template[0]); i++)
2458 bfd_putl32 (template[i], loc);
2462 template_size = (template_size + 7) & ~7;
2463 stub_sec->size += template_size;
2465 switch (stub_entry->stub_type)
2467 case aarch64_stub_adrp_branch:
2468 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2469 stub_entry->stub_offset, sym_value))
2470 /* The stub would not have been relaxed if the offset was out
2474 _bfd_final_link_relocate
2475 (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)),
2479 stub_entry->stub_offset + 4,
2484 case aarch64_stub_long_branch:
2485 /* We want the value relative to the address 12 bytes back from the
2487 _bfd_final_link_relocate (elfNN_aarch64_howto_from_type
2488 (AARCH64_R (PRELNN)), stub_bfd, stub_sec,
2490 stub_entry->stub_offset + 16,
2494 case aarch64_stub_erratum_835769_veneer:
2495 veneered_insn_loc = stub_entry->target_section->output_section->vma
2496 + stub_entry->target_section->output_offset
2497 + stub_entry->target_value;
2498 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
2499 + stub_entry->stub_sec->output_offset
2500 + stub_entry->stub_offset;
2501 branch_offset = veneered_insn_loc - veneer_entry_loc;
2502 branch_offset >>= 2;
2503 branch_offset &= 0x3ffffff;
2504 bfd_putl32 (stub_entry->veneered_insn,
2505 stub_sec->contents + stub_entry->stub_offset);
2506 bfd_putl32 (template[1] | branch_offset,
2507 stub_sec->contents + stub_entry->stub_offset + 4);
2517 /* As above, but don't actually build the stub. Just bump offset so
2518 we know stub section sizes. */
2521 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2522 void *in_arg ATTRIBUTE_UNUSED)
2524 struct elf_aarch64_stub_hash_entry *stub_entry;
2527 /* Massage our args to the form they really have. */
2528 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2530 switch (stub_entry->stub_type)
2532 case aarch64_stub_adrp_branch:
2533 size = sizeof (aarch64_adrp_branch_stub);
2535 case aarch64_stub_long_branch:
2536 size = sizeof (aarch64_long_branch_stub);
2538 case aarch64_stub_erratum_835769_veneer:
2539 size = sizeof (aarch64_erratum_835769_stub);
2545 size = (size + 7) & ~7;
2546 stub_entry->stub_sec->size += size;
2550 /* External entry points for sizing and building linker stubs. */
2552 /* Set up various things so that we can make a list of input sections
2553 for each output section included in the link. Returns -1 on error,
2554 0 when no stubs will be needed, and 1 on success. */
2557 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2558 struct bfd_link_info *info)
2561 unsigned int bfd_count;
2562 int top_id, top_index;
2564 asection **input_list, **list;
2566 struct elf_aarch64_link_hash_table *htab =
2567 elf_aarch64_hash_table (info);
2569 if (!is_elf_hash_table (htab))
2572 /* Count the number of input BFDs and find the top input section id. */
2573 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2574 input_bfd != NULL; input_bfd = input_bfd->link.next)
2577 for (section = input_bfd->sections;
2578 section != NULL; section = section->next)
2580 if (top_id < section->id)
2581 top_id = section->id;
2584 htab->bfd_count = bfd_count;
2586 amt = sizeof (struct map_stub) * (top_id + 1);
2587 htab->stub_group = bfd_zmalloc (amt);
2588 if (htab->stub_group == NULL)
2591 /* We can't use output_bfd->section_count here to find the top output
2592 section index as some sections may have been removed, and
2593 _bfd_strip_section_from_output doesn't renumber the indices. */
2594 for (section = output_bfd->sections, top_index = 0;
2595 section != NULL; section = section->next)
2597 if (top_index < section->index)
2598 top_index = section->index;
2601 htab->top_index = top_index;
2602 amt = sizeof (asection *) * (top_index + 1);
2603 input_list = bfd_malloc (amt);
2604 htab->input_list = input_list;
2605 if (input_list == NULL)
2608 /* For sections we aren't interested in, mark their entries with a
2609 value we can check later. */
2610 list = input_list + top_index;
2612 *list = bfd_abs_section_ptr;
2613 while (list-- != input_list);
2615 for (section = output_bfd->sections;
2616 section != NULL; section = section->next)
2618 if ((section->flags & SEC_CODE) != 0)
2619 input_list[section->index] = NULL;
2625 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2626 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2628 /* The linker repeatedly calls this function for each input section,
2629 in the order that input sections are linked into output sections.
2630 Build lists of input sections to determine groupings between which
2631 we may insert linker stubs. */
2634 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2636 struct elf_aarch64_link_hash_table *htab =
2637 elf_aarch64_hash_table (info);
2639 if (isec->output_section->index <= htab->top_index)
2641 asection **list = htab->input_list + isec->output_section->index;
2643 if (*list != bfd_abs_section_ptr)
2645 /* Steal the link_sec pointer for our list. */
2646 /* This happens to make the list in reverse order,
2647 which is what we want. */
2648 PREV_SEC (isec) = *list;
2654 /* See whether we can group stub sections together. Grouping stub
2655 sections may result in fewer stubs. More importantly, we need to
2656 put all .init* and .fini* stubs at the beginning of the .init or
2657 .fini output sections respectively, because glibc splits the
2658 _init and _fini functions into multiple parts. Putting a stub in
2659 the middle of a function is not a good idea. */
2662 group_sections (struct elf_aarch64_link_hash_table *htab,
2663 bfd_size_type stub_group_size,
2664 bfd_boolean stubs_always_before_branch)
2666 asection **list = htab->input_list + htab->top_index;
2670 asection *tail = *list;
2672 if (tail == bfd_abs_section_ptr)
2675 while (tail != NULL)
2679 bfd_size_type total;
2683 while ((prev = PREV_SEC (curr)) != NULL
2684 && ((total += curr->output_offset - prev->output_offset)
2688 /* OK, the size from the start of CURR to the end is less
2689 than stub_group_size and thus can be handled by one stub
2690 section. (Or the tail section is itself larger than
2691 stub_group_size, in which case we may be toast.)
2692 We should really be keeping track of the total size of
2693 stubs added here, as stubs contribute to the final output
2697 prev = PREV_SEC (tail);
2698 /* Set up this stub group. */
2699 htab->stub_group[tail->id].link_sec = curr;
2701 while (tail != curr && (tail = prev) != NULL);
2703 /* But wait, there's more! Input sections up to stub_group_size
2704 bytes before the stub section can be handled by it too. */
2705 if (!stubs_always_before_branch)
2709 && ((total += tail->output_offset - prev->output_offset)
2713 prev = PREV_SEC (tail);
2714 htab->stub_group[tail->id].link_sec = curr;
2720 while (list-- != htab->input_list);
2722 free (htab->input_list);
2727 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
2729 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
2730 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
2731 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
2732 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
2733 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
2734 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
2736 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
2737 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
2738 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
2739 #define AARCH64_ZR 0x1f
2741 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
2742 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
2744 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
2745 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
2746 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
2747 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
2748 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
2749 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
2750 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
2751 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
2752 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
2753 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
2754 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
2755 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
2756 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
2757 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
2758 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
2759 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
2760 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
2761 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
2763 /* Classify an INSN if it is indeed a load/store.
2765 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
2767 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
2770 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned.
2775 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
2776 bfd_boolean *pair, bfd_boolean *load)
2784 /* Bail out quickly if INSN doesn't fall into the the load-store
2786 if (!AARCH64_LDST (insn))
2791 if (AARCH64_LDST_EX (insn))
2793 *rt = AARCH64_RT (insn);
2795 if (AARCH64_BIT (insn, 21) == 1)
2798 *rt2 = AARCH64_RT2 (insn);
2800 *load = AARCH64_LD (insn);
2803 else if (AARCH64_LDST_NAP (insn)
2804 || AARCH64_LDSTP_PI (insn)
2805 || AARCH64_LDSTP_O (insn)
2806 || AARCH64_LDSTP_PRE (insn))
2809 *rt = AARCH64_RT (insn);
2810 *rt2 = AARCH64_RT2 (insn);
2811 *load = AARCH64_LD (insn);
2814 else if (AARCH64_LDST_PCREL (insn)
2815 || AARCH64_LDST_UI (insn)
2816 || AARCH64_LDST_PIIMM (insn)
2817 || AARCH64_LDST_U (insn)
2818 || AARCH64_LDST_PREIMM (insn)
2819 || AARCH64_LDST_RO (insn)
2820 || AARCH64_LDST_UIMM (insn))
2822 *rt = AARCH64_RT (insn);
2824 if (AARCH64_LDST_PCREL (insn))
2826 opc = AARCH64_BITS (insn, 22, 2);
2827 v = AARCH64_BIT (insn, 26);
2828 opc_v = opc | (v << 2);
2829 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
2830 || opc_v == 5 || opc_v == 7);
2833 else if (AARCH64_LDST_SIMD_M (insn)
2834 || AARCH64_LDST_SIMD_M_PI (insn))
2836 *rt = AARCH64_RT (insn);
2837 *load = AARCH64_BIT (insn, 22);
2838 opcode = (insn >> 12) & 0xf;
2865 else if (AARCH64_LDST_SIMD_S (insn)
2866 || AARCH64_LDST_SIMD_S_PI (insn))
2868 *rt = AARCH64_RT (insn);
2869 r = (insn >> 21) & 1;
2870 *load = AARCH64_BIT (insn, 22);
2871 opcode = (insn >> 13) & 0x7;
2883 *rt2 = *rt + (r == 0 ? 2 : 3);
2891 *rt2 = *rt + (r == 0 ? 2 : 3);
2903 /* Return TRUE if INSN is multiply-accumulate. */
2906 aarch64_mlxl_p (uint32_t insn)
2908 uint32_t op31 = AARCH64_OP31 (insn);
2910 if (AARCH64_MAC (insn)
2911 && (op31 == 0 || op31 == 1 || op31 == 5)
2912 /* Exclude MUL instructions which are encoded as a multiple accumulate
2914 && AARCH64_RA (insn) != AARCH64_ZR)
2920 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
2921 it is possible for a 64-bit multiply-accumulate instruction to generate an
2922 incorrect result. The details are quite complex and hard to
2923 determine statically, since branches in the code may exist in some
2924 circumstances, but all cases end with a memory (load, store, or
2925 prefetch) instruction followed immediately by the multiply-accumulate
2926 operation. We employ a linker patching technique, by moving the potentially
2927 affected multiply-accumulate instruction into a patch region and replacing
2928 the original instruction with a branch to the patch. This function checks
2929 if INSN_1 is the memory operation followed by a multiply-accumulate
2930 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
2931 if INSN_1 and INSN_2 are safe. */
2934 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
2944 if (aarch64_mlxl_p (insn_2)
2945 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
2947 /* Any SIMD memory op is independent of the subsequent MLA
2948 by definition of the erratum. */
2949 if (AARCH64_BIT (insn_1, 26))
2952 /* If not SIMD, check for integer memory ops and MLA relationship. */
2953 rn = AARCH64_RN (insn_2);
2954 ra = AARCH64_RA (insn_2);
2955 rm = AARCH64_RM (insn_2);
2957 /* If this is a load and there's a true(RAW) dependency, we are safe
2958 and this is not an erratum sequence. */
2960 (rt == rn || rt == rm || rt == ra
2961 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
2964 /* We conservatively put out stubs for all other cases (including
2972 /* Used to order a list of mapping symbols by address. */
2975 elf_aarch64_compare_mapping (const void *a, const void *b)
2977 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
2978 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
2980 if (amap->vma > bmap->vma)
2982 else if (amap->vma < bmap->vma)
2984 else if (amap->type > bmap->type)
2985 /* Ensure results do not depend on the host qsort for objects with
2986 multiple mapping symbols at the same address by sorting on type
2989 else if (amap->type < bmap->type)
2997 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes)
2999 char *stub_name = (char *) bfd_malloc
3000 (strlen ("__erratum_835769_veneer_") + 16);
3001 sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3005 /* Scan for cortex-a53 erratum 835769 sequence.
3007 Return TRUE else FALSE on abnormal termination. */
3010 _bfd_aarch64_erratum_835769_scan (bfd *input_bfd,
3011 struct bfd_link_info *info,
3012 unsigned int *num_fixes_p)
3015 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3016 unsigned int num_fixes = *num_fixes_p;
3021 for (section = input_bfd->sections;
3023 section = section->next)
3025 bfd_byte *contents = NULL;
3026 struct _aarch64_elf_section_data *sec_data;
3029 if (elf_section_type (section) != SHT_PROGBITS
3030 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3031 || (section->flags & SEC_EXCLUDE) != 0
3032 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3033 || (section->output_section == bfd_abs_section_ptr))
3036 if (elf_section_data (section)->this_hdr.contents != NULL)
3037 contents = elf_section_data (section)->this_hdr.contents;
3038 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3041 sec_data = elf_aarch64_section_data (section);
3043 qsort (sec_data->map, sec_data->mapcount,
3044 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3046 for (span = 0; span < sec_data->mapcount; span++)
3048 unsigned int span_start = sec_data->map[span].vma;
3049 unsigned int span_end = ((span == sec_data->mapcount - 1)
3050 ? sec_data->map[0].vma + section->size
3051 : sec_data->map[span + 1].vma);
3053 char span_type = sec_data->map[span].type;
3055 if (span_type == 'd')
3058 for (i = span_start; i + 4 < span_end; i += 4)
3060 uint32_t insn_1 = bfd_getl32 (contents + i);
3061 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3063 if (aarch64_erratum_sequence (insn_1, insn_2))
3065 struct elf_aarch64_stub_hash_entry *stub_entry;
3066 char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes);
3070 stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name,
3076 stub_entry->stub_type = aarch64_stub_erratum_835769_veneer;
3077 stub_entry->target_section = section;
3078 stub_entry->target_value = i + 4;
3079 stub_entry->veneered_insn = insn_2;
3080 stub_entry->output_name = stub_name;
3085 if (elf_section_data (section)->this_hdr.contents == NULL)
3093 /* Resize all stub sections. */
3096 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab)
3100 /* OK, we've added some stubs. Find out the new size of the
3102 for (section = htab->stub_bfd->sections;
3103 section != NULL; section = section->next)
3105 /* Ignore non-stub sections. */
3106 if (!strstr (section->name, STUB_SUFFIX))
3111 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3115 /* Determine and set the size of the stub section for a final link.
3117 The basic idea here is to examine all the relocations looking for
3118 PC-relative calls to a target that is unreachable with a "bl"
3122 elfNN_aarch64_size_stubs (bfd *output_bfd,
3124 struct bfd_link_info *info,
3125 bfd_signed_vma group_size,
3126 asection * (*add_stub_section) (const char *,
3128 void (*layout_sections_again) (void))
3130 bfd_size_type stub_group_size;
3131 bfd_boolean stubs_always_before_branch;
3132 bfd_boolean stub_changed = FALSE;
3133 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3134 unsigned int num_erratum_835769_fixes = 0;
3136 /* Propagate mach to stub bfd, because it may not have been
3137 finalized when we created stub_bfd. */
3138 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3139 bfd_get_mach (output_bfd));
3141 /* Stash our params away. */
3142 htab->stub_bfd = stub_bfd;
3143 htab->add_stub_section = add_stub_section;
3144 htab->layout_sections_again = layout_sections_again;
3145 stubs_always_before_branch = group_size < 0;
3147 stub_group_size = -group_size;
3149 stub_group_size = group_size;
3151 if (stub_group_size == 1)
3153 /* Default values. */
3154 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3155 stub_group_size = 127 * 1024 * 1024;
3158 group_sections (htab, stub_group_size, stubs_always_before_branch);
3160 if (htab->fix_erratum_835769)
3164 for (input_bfd = info->input_bfds;
3165 input_bfd != NULL; input_bfd = input_bfd->link.next)
3166 if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info,
3167 &num_erratum_835769_fixes))
3170 stub_changed = TRUE;
3177 for (input_bfd = info->input_bfds;
3178 input_bfd != NULL; input_bfd = input_bfd->link.next)
3180 Elf_Internal_Shdr *symtab_hdr;
3182 Elf_Internal_Sym *local_syms = NULL;
3184 /* We'll need the symbol table in a second. */
3185 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3186 if (symtab_hdr->sh_info == 0)
3189 /* Walk over each section attached to the input bfd. */
3190 for (section = input_bfd->sections;
3191 section != NULL; section = section->next)
3193 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3195 /* If there aren't any relocs, then there's nothing more
3197 if ((section->flags & SEC_RELOC) == 0
3198 || section->reloc_count == 0
3199 || (section->flags & SEC_CODE) == 0)
3202 /* If this section is a link-once section that will be
3203 discarded, then don't create any stubs. */
3204 if (section->output_section == NULL
3205 || section->output_section->owner != output_bfd)
3208 /* Get the relocs. */
3210 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3211 NULL, info->keep_memory);
3212 if (internal_relocs == NULL)
3213 goto error_ret_free_local;
3215 /* Now examine each relocation. */
3216 irela = internal_relocs;
3217 irelaend = irela + section->reloc_count;
3218 for (; irela < irelaend; irela++)
3220 unsigned int r_type, r_indx;
3221 enum elf_aarch64_stub_type stub_type;
3222 struct elf_aarch64_stub_hash_entry *stub_entry;
3225 bfd_vma destination;
3226 struct elf_aarch64_link_hash_entry *hash;
3227 const char *sym_name;
3229 const asection *id_sec;
3230 unsigned char st_type;
3233 r_type = ELFNN_R_TYPE (irela->r_info);
3234 r_indx = ELFNN_R_SYM (irela->r_info);
3236 if (r_type >= (unsigned int) R_AARCH64_end)
3238 bfd_set_error (bfd_error_bad_value);
3239 error_ret_free_internal:
3240 if (elf_section_data (section)->relocs == NULL)
3241 free (internal_relocs);
3242 goto error_ret_free_local;
3245 /* Only look for stubs on unconditional branch and
3246 branch and link instructions. */
3247 if (r_type != (unsigned int) AARCH64_R (CALL26)
3248 && r_type != (unsigned int) AARCH64_R (JUMP26))
3251 /* Now determine the call target, its name, value,
3258 if (r_indx < symtab_hdr->sh_info)
3260 /* It's a local symbol. */
3261 Elf_Internal_Sym *sym;
3262 Elf_Internal_Shdr *hdr;
3264 if (local_syms == NULL)
3267 = (Elf_Internal_Sym *) symtab_hdr->contents;
3268 if (local_syms == NULL)
3270 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3271 symtab_hdr->sh_info, 0,
3273 if (local_syms == NULL)
3274 goto error_ret_free_internal;
3277 sym = local_syms + r_indx;
3278 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3279 sym_sec = hdr->bfd_section;
3281 /* This is an undefined symbol. It can never
3285 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3286 sym_value = sym->st_value;
3287 destination = (sym_value + irela->r_addend
3288 + sym_sec->output_offset
3289 + sym_sec->output_section->vma);
3290 st_type = ELF_ST_TYPE (sym->st_info);
3292 = bfd_elf_string_from_elf_section (input_bfd,
3293 symtab_hdr->sh_link,
3300 e_indx = r_indx - symtab_hdr->sh_info;
3301 hash = ((struct elf_aarch64_link_hash_entry *)
3302 elf_sym_hashes (input_bfd)[e_indx]);
3304 while (hash->root.root.type == bfd_link_hash_indirect
3305 || hash->root.root.type == bfd_link_hash_warning)
3306 hash = ((struct elf_aarch64_link_hash_entry *)
3307 hash->root.root.u.i.link);
3309 if (hash->root.root.type == bfd_link_hash_defined
3310 || hash->root.root.type == bfd_link_hash_defweak)
3312 struct elf_aarch64_link_hash_table *globals =
3313 elf_aarch64_hash_table (info);
3314 sym_sec = hash->root.root.u.def.section;
3315 sym_value = hash->root.root.u.def.value;
3316 /* For a destination in a shared library,
3317 use the PLT stub as target address to
3318 decide whether a branch stub is
3320 if (globals->root.splt != NULL && hash != NULL
3321 && hash->root.plt.offset != (bfd_vma) - 1)
3323 sym_sec = globals->root.splt;
3324 sym_value = hash->root.plt.offset;
3325 if (sym_sec->output_section != NULL)
3326 destination = (sym_value
3327 + sym_sec->output_offset
3329 sym_sec->output_section->vma);
3331 else if (sym_sec->output_section != NULL)
3332 destination = (sym_value + irela->r_addend
3333 + sym_sec->output_offset
3334 + sym_sec->output_section->vma);
3336 else if (hash->root.root.type == bfd_link_hash_undefined
3337 || (hash->root.root.type
3338 == bfd_link_hash_undefweak))
3340 /* For a shared library, use the PLT stub as
3341 target address to decide whether a long
3342 branch stub is needed.
3343 For absolute code, they cannot be handled. */
3344 struct elf_aarch64_link_hash_table *globals =
3345 elf_aarch64_hash_table (info);
3347 if (globals->root.splt != NULL && hash != NULL
3348 && hash->root.plt.offset != (bfd_vma) - 1)
3350 sym_sec = globals->root.splt;
3351 sym_value = hash->root.plt.offset;
3352 if (sym_sec->output_section != NULL)
3353 destination = (sym_value
3354 + sym_sec->output_offset
3356 sym_sec->output_section->vma);
3363 bfd_set_error (bfd_error_bad_value);
3364 goto error_ret_free_internal;
3366 st_type = ELF_ST_TYPE (hash->root.type);
3367 sym_name = hash->root.root.root.string;
3370 /* Determine what (if any) linker stub is needed. */
3371 stub_type = aarch64_type_of_stub
3372 (info, section, irela, st_type, hash, destination);
3373 if (stub_type == aarch64_stub_none)
3376 /* Support for grouping stub sections. */
3377 id_sec = htab->stub_group[section->id].link_sec;
3379 /* Get the name of this stub. */
3380 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
3383 goto error_ret_free_internal;
3386 aarch64_stub_hash_lookup (&htab->stub_hash_table,
3387 stub_name, FALSE, FALSE);
3388 if (stub_entry != NULL)
3390 /* The proper stub has already been created. */
3395 stub_entry = _bfd_aarch64_add_stub_entry_in_group
3396 (stub_name, section, htab);
3397 if (stub_entry == NULL)
3400 goto error_ret_free_internal;
3403 stub_entry->target_value = sym_value;
3404 stub_entry->target_section = sym_sec;
3405 stub_entry->stub_type = stub_type;
3406 stub_entry->h = hash;
3407 stub_entry->st_type = st_type;
3409 if (sym_name == NULL)
3410 sym_name = "unnamed";
3411 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
3412 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
3413 if (stub_entry->output_name == NULL)
3416 goto error_ret_free_internal;
3419 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
3422 stub_changed = TRUE;
3425 /* We're done with the internal relocs, free them. */
3426 if (elf_section_data (section)->relocs == NULL)
3427 free (internal_relocs);
3434 _bfd_aarch64_resize_stubs (htab);
3436 /* Ask the linker to do its stuff. */
3437 (*htab->layout_sections_again) ();
3438 stub_changed = FALSE;
3443 error_ret_free_local:
3447 /* Build all the stubs associated with the current output file. The
3448 stubs are kept in a hash table attached to the main linker hash
3449 table. We also set up the .plt entries for statically linked PIC
3450 functions here. This function is called via aarch64_elf_finish in the
3454 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
3457 struct bfd_hash_table *table;
3458 struct elf_aarch64_link_hash_table *htab;
3460 htab = elf_aarch64_hash_table (info);
3462 for (stub_sec = htab->stub_bfd->sections;
3463 stub_sec != NULL; stub_sec = stub_sec->next)
3467 /* Ignore non-stub sections. */
3468 if (!strstr (stub_sec->name, STUB_SUFFIX))
3471 /* Allocate memory to hold the linker stubs. */
3472 size = stub_sec->size;
3473 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3474 if (stub_sec->contents == NULL && size != 0)
3479 /* Build the stubs as directed by the stub hash table. */
3480 table = &htab->stub_hash_table;
3481 bfd_hash_traverse (table, aarch64_build_one_stub, info);
3487 /* Add an entry to the code/data map for section SEC. */
3490 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
3492 struct _aarch64_elf_section_data *sec_data =
3493 elf_aarch64_section_data (sec);
3494 unsigned int newidx;
3496 if (sec_data->map == NULL)
3498 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
3499 sec_data->mapcount = 0;
3500 sec_data->mapsize = 1;
3503 newidx = sec_data->mapcount++;
3505 if (sec_data->mapcount > sec_data->mapsize)
3507 sec_data->mapsize *= 2;
3508 sec_data->map = bfd_realloc_or_free
3509 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
3514 sec_data->map[newidx].vma = vma;
3515 sec_data->map[newidx].type = type;
3520 /* Initialise maps of insn/data for input BFDs. */
3522 bfd_elfNN_aarch64_init_maps (bfd *abfd)
3524 Elf_Internal_Sym *isymbuf;
3525 Elf_Internal_Shdr *hdr;
3526 unsigned int i, localsyms;
3528 /* Make sure that we are dealing with an AArch64 elf binary. */
3529 if (!is_aarch64_elf (abfd))
3532 if ((abfd->flags & DYNAMIC) != 0)
3535 hdr = &elf_symtab_hdr (abfd);
3536 localsyms = hdr->sh_info;
3538 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3539 should contain the number of local symbols, which should come before any
3540 global symbols. Mapping symbols are always local. */
3541 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
3543 /* No internal symbols read? Skip this BFD. */
3544 if (isymbuf == NULL)
3547 for (i = 0; i < localsyms; i++)
3549 Elf_Internal_Sym *isym = &isymbuf[i];
3550 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3553 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3555 name = bfd_elf_string_from_elf_section (abfd,
3559 if (bfd_is_aarch64_special_symbol_name
3560 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
3561 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
3566 /* Set option values needed during linking. */
3568 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
3569 struct bfd_link_info *link_info,
3571 int no_wchar_warn, int pic_veneer,
3572 int fix_erratum_835769)
3574 struct elf_aarch64_link_hash_table *globals;
3576 globals = elf_aarch64_hash_table (link_info);
3577 globals->pic_veneer = pic_veneer;
3578 globals->fix_erratum_835769 = fix_erratum_835769;
3580 BFD_ASSERT (is_aarch64_elf (output_bfd));
3581 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3582 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
3586 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
3587 struct elf_aarch64_link_hash_table
3588 *globals, struct bfd_link_info *info,
3589 bfd_vma value, bfd *output_bfd,
3590 bfd_boolean *unresolved_reloc_p)
3592 bfd_vma off = (bfd_vma) - 1;
3593 asection *basegot = globals->root.sgot;
3594 bfd_boolean dyn = globals->root.dynamic_sections_created;
3598 BFD_ASSERT (basegot != NULL);
3599 off = h->got.offset;
3600 BFD_ASSERT (off != (bfd_vma) - 1);
3601 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3603 && SYMBOL_REFERENCES_LOCAL (info, h))
3604 || (ELF_ST_VISIBILITY (h->other)
3605 && h->root.type == bfd_link_hash_undefweak))
3607 /* This is actually a static link, or it is a -Bsymbolic link
3608 and the symbol is defined locally. We must initialize this
3609 entry in the global offset table. Since the offset must
3610 always be a multiple of 8 (4 in the case of ILP32), we use
3611 the least significant bit to record whether we have
3612 initialized it already.
3613 When doing a dynamic link, we create a .rel(a).got relocation
3614 entry to initialize the value. This is done in the
3615 finish_dynamic_symbol routine. */
3620 bfd_put_NN (output_bfd, value, basegot->contents + off);
3625 *unresolved_reloc_p = FALSE;
3627 off = off + basegot->output_section->vma + basegot->output_offset;
3633 /* Change R_TYPE to a more efficient access model where possible,
3634 return the new reloc type. */
3636 static bfd_reloc_code_real_type
3637 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
3638 struct elf_link_hash_entry *h)
3640 bfd_boolean is_local = h == NULL;
3644 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3645 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3647 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3648 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
3650 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
3652 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3655 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
3657 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3658 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
3660 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3661 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3663 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3664 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
3666 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3667 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
3669 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
3670 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
3672 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
3675 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
3677 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
3678 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
3680 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3681 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3682 /* Instructions with these relocations will become NOPs. */
3683 return BFD_RELOC_AARCH64_NONE;
3693 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
3697 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3698 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3699 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3700 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3703 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3704 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
3705 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3708 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3709 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3710 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
3711 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3712 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3713 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3714 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
3715 return GOT_TLSDESC_GD;
3717 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3718 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3719 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3720 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
3723 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3724 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3725 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3726 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3727 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3728 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3729 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3730 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3740 aarch64_can_relax_tls (bfd *input_bfd,
3741 struct bfd_link_info *info,
3742 bfd_reloc_code_real_type r_type,
3743 struct elf_link_hash_entry *h,
3744 unsigned long r_symndx)
3746 unsigned int symbol_got_type;
3747 unsigned int reloc_got_type;
3749 if (! IS_AARCH64_TLS_RELOC (r_type))
3752 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
3753 reloc_got_type = aarch64_reloc_got_type (r_type);
3755 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
3761 if (h && h->root.type == bfd_link_hash_undefweak)
3767 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
3770 static bfd_reloc_code_real_type
3771 aarch64_tls_transition (bfd *input_bfd,
3772 struct bfd_link_info *info,
3773 unsigned int r_type,
3774 struct elf_link_hash_entry *h,
3775 unsigned long r_symndx)
3777 bfd_reloc_code_real_type bfd_r_type
3778 = elfNN_aarch64_bfd_reloc_from_type (r_type);
3780 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
3783 return aarch64_tls_transition_without_check (bfd_r_type, h);
3786 /* Return the base VMA address which should be subtracted from real addresses
3787 when resolving R_AARCH64_TLS_DTPREL relocation. */
3790 dtpoff_base (struct bfd_link_info *info)
3792 /* If tls_sec is NULL, we should have signalled an error already. */
3793 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
3794 return elf_hash_table (info)->tls_sec->vma;
3797 /* Return the base VMA address which should be subtracted from real addresses
3798 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
3801 tpoff_base (struct bfd_link_info *info)
3803 struct elf_link_hash_table *htab = elf_hash_table (info);
3805 /* If tls_sec is NULL, we should have signalled an error already. */
3806 BFD_ASSERT (htab->tls_sec != NULL);
3808 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
3809 htab->tls_sec->alignment_power);
3810 return htab->tls_sec->vma - base;
3814 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3815 unsigned long r_symndx)
3817 /* Calculate the address of the GOT entry for symbol
3818 referred to in h. */
3820 return &h->got.offset;
3824 struct elf_aarch64_local_symbol *l;
3826 l = elf_aarch64_locals (input_bfd);
3827 return &l[r_symndx].got_offset;
3832 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3833 unsigned long r_symndx)
3836 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
3841 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
3842 unsigned long r_symndx)
3845 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3850 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3851 unsigned long r_symndx)
3854 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3860 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3861 unsigned long r_symndx)
3863 /* Calculate the address of the GOT entry for symbol
3864 referred to in h. */
3867 struct elf_aarch64_link_hash_entry *eh;
3868 eh = (struct elf_aarch64_link_hash_entry *) h;
3869 return &eh->tlsdesc_got_jump_table_offset;
3874 struct elf_aarch64_local_symbol *l;
3876 l = elf_aarch64_locals (input_bfd);
3877 return &l[r_symndx].tlsdesc_got_jump_table_offset;
3882 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3883 unsigned long r_symndx)
3886 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3891 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
3892 struct elf_link_hash_entry *h,
3893 unsigned long r_symndx)
3896 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3901 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3902 unsigned long r_symndx)
3905 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3910 /* Data for make_branch_to_erratum_835769_stub(). */
3912 struct erratum_835769_branch_to_stub_data
3914 asection *output_section;
3918 /* Helper to insert branches to erratum 835769 stubs in the right
3919 places for a particular section. */
3922 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
3925 struct elf_aarch64_stub_hash_entry *stub_entry;
3926 struct erratum_835769_branch_to_stub_data *data;
3928 unsigned long branch_insn = 0;
3929 bfd_vma veneered_insn_loc, veneer_entry_loc;
3930 bfd_signed_vma branch_offset;
3931 unsigned int target;
3934 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
3935 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
3937 if (stub_entry->target_section != data->output_section
3938 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
3941 contents = data->contents;
3942 veneered_insn_loc = stub_entry->target_section->output_section->vma
3943 + stub_entry->target_section->output_offset
3944 + stub_entry->target_value;
3945 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
3946 + stub_entry->stub_sec->output_offset
3947 + stub_entry->stub_offset;
3948 branch_offset = veneer_entry_loc - veneered_insn_loc;
3950 abfd = stub_entry->target_section->owner;
3951 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
3952 (*_bfd_error_handler)
3953 (_("%B: error: Erratum 835769 stub out "
3954 "of range (input file too large)"), abfd);
3956 target = stub_entry->target_value;
3957 branch_insn = 0x14000000;
3958 branch_offset >>= 2;
3959 branch_offset &= 0x3ffffff;
3960 branch_insn |= branch_offset;
3961 bfd_putl32 (branch_insn, &contents[target]);
3967 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
3968 struct bfd_link_info *link_info,
3973 struct elf_aarch64_link_hash_table *globals =
3974 elf_aarch64_hash_table (link_info);
3976 if (globals == NULL)
3979 /* Fix code to point to erratum 835769 stubs. */
3980 if (globals->fix_erratum_835769)
3982 struct erratum_835769_branch_to_stub_data data;
3984 data.output_section = sec;
3985 data.contents = contents;
3986 bfd_hash_traverse (&globals->stub_hash_table,
3987 make_branch_to_erratum_835769_stub, &data);
3993 /* Perform a relocation as part of a final link. */
3994 static bfd_reloc_status_type
3995 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
3998 asection *input_section,
4000 Elf_Internal_Rela *rel,
4002 struct bfd_link_info *info,
4004 struct elf_link_hash_entry *h,
4005 bfd_boolean *unresolved_reloc_p,
4006 bfd_boolean save_addend,
4007 bfd_vma *saved_addend,
4008 Elf_Internal_Sym *sym)
4010 Elf_Internal_Shdr *symtab_hdr;
4011 unsigned int r_type = howto->type;
4012 bfd_reloc_code_real_type bfd_r_type
4013 = elfNN_aarch64_bfd_reloc_from_howto (howto);
4014 bfd_reloc_code_real_type new_bfd_r_type;
4015 unsigned long r_symndx;
4016 bfd_byte *hit_data = contents + rel->r_offset;
4018 bfd_signed_vma signed_addend;
4019 struct elf_aarch64_link_hash_table *globals;
4020 bfd_boolean weak_undef_p;
4022 globals = elf_aarch64_hash_table (info);
4024 symtab_hdr = &elf_symtab_hdr (input_bfd);
4026 BFD_ASSERT (is_aarch64_elf (input_bfd));
4028 r_symndx = ELFNN_R_SYM (rel->r_info);
4030 /* It is possible to have linker relaxations on some TLS access
4031 models. Update our information here. */
4032 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
4033 if (new_bfd_r_type != bfd_r_type)
4035 bfd_r_type = new_bfd_r_type;
4036 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4037 BFD_ASSERT (howto != NULL);
4038 r_type = howto->type;
4041 place = input_section->output_section->vma
4042 + input_section->output_offset + rel->r_offset;
4044 /* Get addend, accumulating the addend for consecutive relocs
4045 which refer to the same offset. */
4046 signed_addend = saved_addend ? *saved_addend : 0;
4047 signed_addend += rel->r_addend;
4049 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
4050 : bfd_is_und_section (sym_sec));
4052 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4053 it here if it is defined in a non-shared object. */
4055 && h->type == STT_GNU_IFUNC
4063 if ((input_section->flags & SEC_ALLOC) == 0
4064 || h->plt.offset == (bfd_vma) -1)
4067 /* STT_GNU_IFUNC symbol must go through PLT. */
4068 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
4069 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
4074 if (h->root.root.string)
4075 name = h->root.root.string;
4077 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4079 (*_bfd_error_handler)
4080 (_("%B: relocation %s against STT_GNU_IFUNC "
4081 "symbol `%s' isn't handled by %s"), input_bfd,
4082 howto->name, name, __FUNCTION__);
4083 bfd_set_error (bfd_error_bad_value);
4086 case BFD_RELOC_AARCH64_NN:
4087 if (rel->r_addend != 0)
4089 if (h->root.root.string)
4090 name = h->root.root.string;
4092 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4094 (*_bfd_error_handler)
4095 (_("%B: relocation %s against STT_GNU_IFUNC "
4096 "symbol `%s' has non-zero addend: %d"),
4097 input_bfd, howto->name, name, rel->r_addend);
4098 bfd_set_error (bfd_error_bad_value);
4102 /* Generate dynamic relocation only when there is a
4103 non-GOT reference in a shared object. */
4104 if (info->shared && h->non_got_ref)
4106 Elf_Internal_Rela outrel;
4109 /* Need a dynamic relocation to get the real function
4111 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4115 if (outrel.r_offset == (bfd_vma) -1
4116 || outrel.r_offset == (bfd_vma) -2)
4119 outrel.r_offset += (input_section->output_section->vma
4120 + input_section->output_offset);
4122 if (h->dynindx == -1
4124 || info->executable)
4126 /* This symbol is resolved locally. */
4127 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
4128 outrel.r_addend = (h->root.u.def.value
4129 + h->root.u.def.section->output_section->vma
4130 + h->root.u.def.section->output_offset);
4134 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4135 outrel.r_addend = 0;
4138 sreloc = globals->root.irelifunc;
4139 elf_append_rela (output_bfd, sreloc, &outrel);
4141 /* If this reloc is against an external symbol, we
4142 do not want to fiddle with the addend. Otherwise,
4143 we need to include the symbol value so that it
4144 becomes an addend for the dynamic reloc. For an
4145 internal symbol, we have updated addend. */
4146 return bfd_reloc_ok;
4149 case BFD_RELOC_AARCH64_JUMP26:
4150 case BFD_RELOC_AARCH64_CALL26:
4151 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4154 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4156 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4157 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4158 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4159 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4160 base_got = globals->root.sgot;
4161 off = h->got.offset;
4163 if (base_got == NULL)
4166 if (off == (bfd_vma) -1)
4170 /* We can't use h->got.offset here to save state, or
4171 even just remember the offset, as finish_dynamic_symbol
4172 would use that as offset into .got. */
4174 if (globals->root.splt != NULL)
4176 plt_index = ((h->plt.offset - globals->plt_header_size) /
4177 globals->plt_entry_size);
4178 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4179 base_got = globals->root.sgotplt;
4183 plt_index = h->plt.offset / globals->plt_entry_size;
4184 off = plt_index * GOT_ENTRY_SIZE;
4185 base_got = globals->root.igotplt;
4188 if (h->dynindx == -1
4192 /* This references the local definition. We must
4193 initialize this entry in the global offset table.
4194 Since the offset must always be a multiple of 8,
4195 we use the least significant bit to record
4196 whether we have initialized it already.
4198 When doing a dynamic link, we create a .rela.got
4199 relocation entry to initialize the value. This
4200 is done in the finish_dynamic_symbol routine. */
4205 bfd_put_NN (output_bfd, value,
4206 base_got->contents + off);
4207 /* Note that this is harmless as -1 | 1 still is -1. */
4211 value = (base_got->output_section->vma
4212 + base_got->output_offset + off);
4215 value = aarch64_calculate_got_entry_vma (h, globals, info,
4217 unresolved_reloc_p);
4218 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4220 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
4221 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4222 case BFD_RELOC_AARCH64_ADD_LO12:
4229 case BFD_RELOC_AARCH64_NONE:
4230 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4231 *unresolved_reloc_p = FALSE;
4232 return bfd_reloc_ok;
4234 case BFD_RELOC_AARCH64_NN:
4236 /* When generating a shared object or relocatable executable, these
4237 relocations are copied into the output file to be resolved at
4239 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
4240 && (input_section->flags & SEC_ALLOC)
4242 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4243 || h->root.type != bfd_link_hash_undefweak))
4245 Elf_Internal_Rela outrel;
4247 bfd_boolean skip, relocate;
4250 *unresolved_reloc_p = FALSE;
4255 outrel.r_addend = signed_addend;
4257 _bfd_elf_section_offset (output_bfd, info, input_section,
4259 if (outrel.r_offset == (bfd_vma) - 1)
4261 else if (outrel.r_offset == (bfd_vma) - 2)
4267 outrel.r_offset += (input_section->output_section->vma
4268 + input_section->output_offset);
4271 memset (&outrel, 0, sizeof outrel);
4274 && (!info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular))
4275 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4280 /* On SVR4-ish systems, the dynamic loader cannot
4281 relocate the text and data segments independently,
4282 so the symbol does not matter. */
4284 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
4285 outrel.r_addend += value;
4288 sreloc = elf_section_data (input_section)->sreloc;
4289 if (sreloc == NULL || sreloc->contents == NULL)
4290 return bfd_reloc_notsupported;
4292 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
4293 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4295 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
4297 /* Sanity to check that we have previously allocated
4298 sufficient space in the relocation section for the
4299 number of relocations we actually want to emit. */
4303 /* If this reloc is against an external symbol, we do not want to
4304 fiddle with the addend. Otherwise, we need to include the symbol
4305 value so that it becomes an addend for the dynamic reloc. */
4307 return bfd_reloc_ok;
4309 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4310 contents, rel->r_offset, value,
4314 value += signed_addend;
4317 case BFD_RELOC_AARCH64_JUMP26:
4318 case BFD_RELOC_AARCH64_CALL26:
4320 asection *splt = globals->root.splt;
4321 bfd_boolean via_plt_p =
4322 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
4324 /* A call to an undefined weak symbol is converted to a jump to
4325 the next instruction unless a PLT entry will be created.
4326 The jump to the next instruction is optimized as a NOP.
4327 Do the same for local undefined symbols. */
4328 if (weak_undef_p && ! via_plt_p)
4330 bfd_putl32 (INSN_NOP, hit_data);
4331 return bfd_reloc_ok;
4334 /* If the call goes through a PLT entry, make sure to
4335 check distance to the right destination address. */
4338 value = (splt->output_section->vma
4339 + splt->output_offset + h->plt.offset);
4340 *unresolved_reloc_p = FALSE;
4343 /* If the target symbol is global and marked as a function the
4344 relocation applies a function call or a tail call. In this
4345 situation we can veneer out of range branches. The veneers
4346 use IP0 and IP1 hence cannot be used arbitrary out of range
4347 branches that occur within the body of a function. */
4348 if (h && h->type == STT_FUNC)
4350 /* Check if a stub has to be inserted because the destination
4352 if (! aarch64_valid_branch_p (value, place))
4354 /* The target is out of reach, so redirect the branch to
4355 the local stub for this function. */
4356 struct elf_aarch64_stub_hash_entry *stub_entry;
4357 stub_entry = elfNN_aarch64_get_stub_entry (input_section,
4360 if (stub_entry != NULL)
4361 value = (stub_entry->stub_offset
4362 + stub_entry->stub_sec->output_offset
4363 + stub_entry->stub_sec->output_section->vma);
4367 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4368 signed_addend, weak_undef_p);
4371 case BFD_RELOC_AARCH64_16:
4373 case BFD_RELOC_AARCH64_32:
4375 case BFD_RELOC_AARCH64_ADD_LO12:
4376 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4377 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4378 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4379 case BFD_RELOC_AARCH64_BRANCH19:
4380 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
4381 case BFD_RELOC_AARCH64_LDST8_LO12:
4382 case BFD_RELOC_AARCH64_LDST16_LO12:
4383 case BFD_RELOC_AARCH64_LDST32_LO12:
4384 case BFD_RELOC_AARCH64_LDST64_LO12:
4385 case BFD_RELOC_AARCH64_LDST128_LO12:
4386 case BFD_RELOC_AARCH64_MOVW_G0_S:
4387 case BFD_RELOC_AARCH64_MOVW_G1_S:
4388 case BFD_RELOC_AARCH64_MOVW_G2_S:
4389 case BFD_RELOC_AARCH64_MOVW_G0:
4390 case BFD_RELOC_AARCH64_MOVW_G0_NC:
4391 case BFD_RELOC_AARCH64_MOVW_G1:
4392 case BFD_RELOC_AARCH64_MOVW_G1_NC:
4393 case BFD_RELOC_AARCH64_MOVW_G2:
4394 case BFD_RELOC_AARCH64_MOVW_G2_NC:
4395 case BFD_RELOC_AARCH64_MOVW_G3:
4396 case BFD_RELOC_AARCH64_16_PCREL:
4397 case BFD_RELOC_AARCH64_32_PCREL:
4398 case BFD_RELOC_AARCH64_64_PCREL:
4399 case BFD_RELOC_AARCH64_TSTBR14:
4400 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4401 signed_addend, weak_undef_p);
4404 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4405 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4406 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4407 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4408 if (globals->root.sgot == NULL)
4409 BFD_ASSERT (h != NULL);
4413 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
4415 unresolved_reloc_p);
4416 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4421 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4422 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4423 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4424 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4425 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4426 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4427 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4428 if (globals->root.sgot == NULL)
4429 return bfd_reloc_notsupported;
4431 value = (symbol_got_offset (input_bfd, h, r_symndx)
4432 + globals->root.sgot->output_section->vma
4433 + globals->root.sgot->output_offset);
4435 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4437 *unresolved_reloc_p = FALSE;
4440 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4441 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4442 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4443 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4444 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4445 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4446 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4447 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4448 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4449 signed_addend - tpoff_base (info),
4451 *unresolved_reloc_p = FALSE;
4454 case BFD_RELOC_AARCH64_TLSDESC_ADD:
4455 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4456 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4457 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4458 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4459 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4460 case BFD_RELOC_AARCH64_TLSDESC_LDR:
4461 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4462 if (globals->root.sgot == NULL)
4463 return bfd_reloc_notsupported;
4464 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
4465 + globals->root.sgotplt->output_section->vma
4466 + globals->root.sgotplt->output_offset
4467 + globals->sgotplt_jump_table_size);
4469 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4471 *unresolved_reloc_p = FALSE;
4475 return bfd_reloc_notsupported;
4479 *saved_addend = value;
4481 /* Only apply the final relocation in a sequence. */
4483 return bfd_reloc_continue;
4485 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4489 /* Handle TLS relaxations. Relaxing is possible for symbols that use
4490 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
4493 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
4494 is to then call final_link_relocate. Return other values in the
4497 static bfd_reloc_status_type
4498 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
4499 bfd *input_bfd, bfd_byte *contents,
4500 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
4502 bfd_boolean is_local = h == NULL;
4503 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
4506 BFD_ASSERT (globals && input_bfd && contents && rel);
4508 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4510 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4511 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4514 /* GD->LE relaxation:
4515 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
4517 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
4519 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
4520 return bfd_reloc_continue;
4524 /* GD->IE relaxation:
4525 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
4527 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
4529 return bfd_reloc_continue;
4532 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4536 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4539 /* Tiny TLSDESC->LE relaxation:
4540 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
4541 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
4545 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
4546 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
4548 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
4549 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
4550 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4552 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
4553 bfd_putl32 (0xf2800000, contents + rel->r_offset + 4);
4554 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
4555 return bfd_reloc_continue;
4559 /* Tiny TLSDESC->IE relaxation:
4560 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
4561 adr x0, :tlsdesc:var => nop
4565 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
4566 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
4568 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4569 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4571 bfd_putl32 (0x58000000, contents + rel->r_offset);
4572 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
4573 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
4574 return bfd_reloc_continue;
4577 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4580 /* Tiny GD->LE relaxation:
4581 adr x0, :tlsgd:var => mrs x1, tpidr_el0
4582 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
4583 nop => add x0, x0, #:tprel_lo12_nc:x
4586 /* First kill the tls_get_addr reloc on the bl instruction. */
4587 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4589 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
4590 bfd_putl32 (0x91400020, contents + rel->r_offset + 4);
4591 bfd_putl32 (0x91000000, contents + rel->r_offset + 8);
4593 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
4594 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
4595 rel[1].r_offset = rel->r_offset + 8;
4597 /* Move the current relocation to the second instruction in
4600 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
4601 AARCH64_R (TLSLE_ADD_TPREL_HI12));
4602 return bfd_reloc_continue;
4606 /* Tiny GD->IE relaxation:
4607 adr x0, :tlsgd:var => ldr x0, :gottprel:var
4608 bl __tls_get_addr => mrs x1, tpidr_el0
4609 nop => add x0, x0, x1
4612 /* First kill the tls_get_addr reloc on the bl instruction. */
4613 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4614 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4616 bfd_putl32 (0x58000000, contents + rel->r_offset);
4617 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
4618 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
4619 return bfd_reloc_continue;
4622 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4623 return bfd_reloc_continue;
4625 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4628 /* GD->LE relaxation:
4629 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
4631 bfd_putl32 (0xf2800000, contents + rel->r_offset);
4632 return bfd_reloc_continue;
4636 /* GD->IE relaxation:
4637 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
4639 insn = bfd_getl32 (contents + rel->r_offset);
4641 bfd_putl32 (insn, contents + rel->r_offset);
4642 return bfd_reloc_continue;
4645 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4648 /* GD->LE relaxation
4649 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
4650 bl __tls_get_addr => mrs x1, tpidr_el0
4651 nop => add x0, x1, x0
4654 /* First kill the tls_get_addr reloc on the bl instruction. */
4655 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4656 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4658 bfd_putl32 (0xf2800000, contents + rel->r_offset);
4659 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
4660 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
4661 return bfd_reloc_continue;
4665 /* GD->IE relaxation
4666 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
4667 BL __tls_get_addr => mrs x1, tpidr_el0
4669 NOP => add x0, x1, x0
4672 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
4674 /* Remove the relocation on the BL instruction. */
4675 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4677 bfd_putl32 (0xf9400000, contents + rel->r_offset);
4679 /* We choose to fixup the BL and NOP instructions using the
4680 offset from the second relocation to allow flexibility in
4681 scheduling instructions between the ADD and BL. */
4682 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
4683 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
4684 return bfd_reloc_continue;
4687 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4688 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4689 /* GD->IE/LE relaxation:
4690 add x0, x0, #:tlsdesc_lo12:var => nop
4693 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
4694 return bfd_reloc_ok;
4696 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4697 /* IE->LE relaxation:
4698 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
4702 insn = bfd_getl32 (contents + rel->r_offset);
4703 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
4705 return bfd_reloc_continue;
4707 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4708 /* IE->LE relaxation:
4709 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
4713 insn = bfd_getl32 (contents + rel->r_offset);
4714 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
4716 return bfd_reloc_continue;
4719 return bfd_reloc_continue;
4722 return bfd_reloc_ok;
4725 /* Relocate an AArch64 ELF section. */
4728 elfNN_aarch64_relocate_section (bfd *output_bfd,
4729 struct bfd_link_info *info,
4731 asection *input_section,
4733 Elf_Internal_Rela *relocs,
4734 Elf_Internal_Sym *local_syms,
4735 asection **local_sections)
4737 Elf_Internal_Shdr *symtab_hdr;
4738 struct elf_link_hash_entry **sym_hashes;
4739 Elf_Internal_Rela *rel;
4740 Elf_Internal_Rela *relend;
4742 struct elf_aarch64_link_hash_table *globals;
4743 bfd_boolean save_addend = FALSE;
4746 globals = elf_aarch64_hash_table (info);
4748 symtab_hdr = &elf_symtab_hdr (input_bfd);
4749 sym_hashes = elf_sym_hashes (input_bfd);
4752 relend = relocs + input_section->reloc_count;
4753 for (; rel < relend; rel++)
4755 unsigned int r_type;
4756 bfd_reloc_code_real_type bfd_r_type;
4757 bfd_reloc_code_real_type relaxed_bfd_r_type;
4758 reloc_howto_type *howto;
4759 unsigned long r_symndx;
4760 Elf_Internal_Sym *sym;
4762 struct elf_link_hash_entry *h;
4764 bfd_reloc_status_type r;
4767 bfd_boolean unresolved_reloc = FALSE;
4768 char *error_message = NULL;
4770 r_symndx = ELFNN_R_SYM (rel->r_info);
4771 r_type = ELFNN_R_TYPE (rel->r_info);
4773 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
4774 howto = bfd_reloc.howto;
4778 (*_bfd_error_handler)
4779 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4780 input_bfd, input_section, r_type);
4783 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
4789 if (r_symndx < symtab_hdr->sh_info)
4791 sym = local_syms + r_symndx;
4792 sym_type = ELFNN_ST_TYPE (sym->st_info);
4793 sec = local_sections[r_symndx];
4795 /* An object file might have a reference to a local
4796 undefined symbol. This is a daft object file, but we
4797 should at least do something about it. */
4798 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
4799 && bfd_is_und_section (sec)
4800 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
4802 if (!info->callbacks->undefined_symbol
4803 (info, bfd_elf_string_from_elf_section
4804 (input_bfd, symtab_hdr->sh_link, sym->st_name),
4805 input_bfd, input_section, rel->r_offset, TRUE))
4809 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4811 /* Relocate against local STT_GNU_IFUNC symbol. */
4812 if (!info->relocatable
4813 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4815 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
4820 /* Set STT_GNU_IFUNC symbol value. */
4821 h->root.u.def.value = sym->st_value;
4822 h->root.u.def.section = sec;
4827 bfd_boolean warned, ignored;
4829 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4830 r_symndx, symtab_hdr, sym_hashes,
4832 unresolved_reloc, warned, ignored);
4837 if (sec != NULL && discarded_section (sec))
4838 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4839 rel, 1, relend, howto, 0, contents);
4841 if (info->relocatable)
4845 name = h->root.root.string;
4848 name = (bfd_elf_string_from_elf_section
4849 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4850 if (name == NULL || *name == '\0')
4851 name = bfd_section_name (input_bfd, sec);
4855 && r_type != R_AARCH64_NONE
4856 && r_type != R_AARCH64_NULL
4858 || h->root.type == bfd_link_hash_defined
4859 || h->root.type == bfd_link_hash_defweak)
4860 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
4862 (*_bfd_error_handler)
4863 ((sym_type == STT_TLS
4864 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4865 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4867 input_section, (long) rel->r_offset, howto->name, name);
4870 /* We relax only if we can see that there can be a valid transition
4871 from a reloc type to another.
4872 We call elfNN_aarch64_final_link_relocate unless we're completely
4873 done, i.e., the relaxation produced the final output we want. */
4875 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
4877 if (relaxed_bfd_r_type != bfd_r_type)
4879 bfd_r_type = relaxed_bfd_r_type;
4880 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4881 BFD_ASSERT (howto != NULL);
4882 r_type = howto->type;
4883 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
4884 unresolved_reloc = 0;
4887 r = bfd_reloc_continue;
4889 /* There may be multiple consecutive relocations for the
4890 same offset. In that case we are supposed to treat the
4891 output of each relocation as the addend for the next. */
4892 if (rel + 1 < relend
4893 && rel->r_offset == rel[1].r_offset
4894 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
4895 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
4898 save_addend = FALSE;
4900 if (r == bfd_reloc_continue)
4901 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
4902 input_section, contents, rel,
4903 relocation, info, sec,
4904 h, &unresolved_reloc,
4905 save_addend, &addend, sym);
4907 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4909 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4910 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4911 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4912 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4914 bfd_boolean need_relocs = FALSE;
4919 off = symbol_got_offset (input_bfd, h, r_symndx);
4920 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4923 (info->shared || indx != 0) &&
4925 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4926 || h->root.type != bfd_link_hash_undefweak);
4928 BFD_ASSERT (globals->root.srelgot != NULL);
4932 Elf_Internal_Rela rela;
4933 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
4935 rela.r_offset = globals->root.sgot->output_section->vma +
4936 globals->root.sgot->output_offset + off;
4939 loc = globals->root.srelgot->contents;
4940 loc += globals->root.srelgot->reloc_count++
4941 * RELOC_SIZE (htab);
4942 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4946 bfd_put_NN (output_bfd,
4947 relocation - dtpoff_base (info),
4948 globals->root.sgot->contents + off
4953 /* This TLS symbol is global. We emit a
4954 relocation to fixup the tls offset at load
4957 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
4960 (globals->root.sgot->output_section->vma
4961 + globals->root.sgot->output_offset + off
4964 loc = globals->root.srelgot->contents;
4965 loc += globals->root.srelgot->reloc_count++
4966 * RELOC_SIZE (globals);
4967 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4968 bfd_put_NN (output_bfd, (bfd_vma) 0,
4969 globals->root.sgot->contents + off
4975 bfd_put_NN (output_bfd, (bfd_vma) 1,
4976 globals->root.sgot->contents + off);
4977 bfd_put_NN (output_bfd,
4978 relocation - dtpoff_base (info),
4979 globals->root.sgot->contents + off
4983 symbol_got_offset_mark (input_bfd, h, r_symndx);
4987 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4988 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4989 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4990 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4992 bfd_boolean need_relocs = FALSE;
4997 off = symbol_got_offset (input_bfd, h, r_symndx);
4999 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5002 (info->shared || indx != 0) &&
5004 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5005 || h->root.type != bfd_link_hash_undefweak);
5007 BFD_ASSERT (globals->root.srelgot != NULL);
5011 Elf_Internal_Rela rela;
5014 rela.r_addend = relocation - dtpoff_base (info);
5018 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
5019 rela.r_offset = globals->root.sgot->output_section->vma +
5020 globals->root.sgot->output_offset + off;
5022 loc = globals->root.srelgot->contents;
5023 loc += globals->root.srelgot->reloc_count++
5024 * RELOC_SIZE (htab);
5026 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5028 bfd_put_NN (output_bfd, rela.r_addend,
5029 globals->root.sgot->contents + off);
5032 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
5033 globals->root.sgot->contents + off);
5035 symbol_got_offset_mark (input_bfd, h, r_symndx);
5039 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5040 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5041 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5042 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5043 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5044 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5045 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5046 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5049 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5050 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5051 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5052 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5053 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5054 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
5056 bfd_boolean need_relocs = FALSE;
5057 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
5058 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
5060 need_relocs = (h == NULL
5061 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5062 || h->root.type != bfd_link_hash_undefweak);
5064 BFD_ASSERT (globals->root.srelgot != NULL);
5065 BFD_ASSERT (globals->root.sgot != NULL);
5070 Elf_Internal_Rela rela;
5071 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
5074 rela.r_offset = (globals->root.sgotplt->output_section->vma
5075 + globals->root.sgotplt->output_offset
5076 + off + globals->sgotplt_jump_table_size);
5079 rela.r_addend = relocation - dtpoff_base (info);
5081 /* Allocate the next available slot in the PLT reloc
5082 section to hold our R_AARCH64_TLSDESC, the next
5083 available slot is determined from reloc_count,
5084 which we step. But note, reloc_count was
5085 artifically moved down while allocating slots for
5086 real PLT relocs such that all of the PLT relocs
5087 will fit above the initial reloc_count and the
5088 extra stuff will fit below. */
5089 loc = globals->root.srelplt->contents;
5090 loc += globals->root.srelplt->reloc_count++
5091 * RELOC_SIZE (globals);
5093 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5095 bfd_put_NN (output_bfd, (bfd_vma) 0,
5096 globals->root.sgotplt->contents + off +
5097 globals->sgotplt_jump_table_size);
5098 bfd_put_NN (output_bfd, (bfd_vma) 0,
5099 globals->root.sgotplt->contents + off +
5100 globals->sgotplt_jump_table_size +
5104 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
5115 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5116 because such sections are not SEC_ALLOC and thus ld.so will
5117 not process them. */
5118 if (unresolved_reloc
5119 && !((input_section->flags & SEC_DEBUGGING) != 0
5121 && _bfd_elf_section_offset (output_bfd, info, input_section,
5122 +rel->r_offset) != (bfd_vma) - 1)
5124 (*_bfd_error_handler)
5126 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5127 input_bfd, input_section, (long) rel->r_offset, howto->name,
5128 h->root.root.string);
5132 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
5136 case bfd_reloc_overflow:
5137 /* If the overflowing reloc was to an undefined symbol,
5138 we have already printed one error message and there
5139 is no point complaining again. */
5141 h->root.type != bfd_link_hash_undefined)
5142 && (!((*info->callbacks->reloc_overflow)
5143 (info, (h ? &h->root : NULL), name, howto->name,
5144 (bfd_vma) 0, input_bfd, input_section,
5149 case bfd_reloc_undefined:
5150 if (!((*info->callbacks->undefined_symbol)
5151 (info, name, input_bfd, input_section,
5152 rel->r_offset, TRUE)))
5156 case bfd_reloc_outofrange:
5157 error_message = _("out of range");
5160 case bfd_reloc_notsupported:
5161 error_message = _("unsupported relocation");
5164 case bfd_reloc_dangerous:
5165 /* error_message should already be set. */
5169 error_message = _("unknown error");
5173 BFD_ASSERT (error_message != NULL);
5174 if (!((*info->callbacks->reloc_dangerous)
5175 (info, error_message, input_bfd, input_section,
5186 /* Set the right machine number. */
5189 elfNN_aarch64_object_p (bfd *abfd)
5192 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
5194 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
5199 /* Function to keep AArch64 specific flags in the ELF header. */
5202 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
5204 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
5209 elf_elfheader (abfd)->e_flags = flags;
5210 elf_flags_init (abfd) = TRUE;
5216 /* Merge backend specific data from an object file to the output
5217 object file when linking. */
5220 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5224 bfd_boolean flags_compatible = TRUE;
5227 /* Check if we have the same endianess. */
5228 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5231 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
5234 /* The input BFD must have had its flags initialised. */
5235 /* The following seems bogus to me -- The flags are initialized in
5236 the assembler but I don't think an elf_flags_init field is
5237 written into the object. */
5238 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5240 in_flags = elf_elfheader (ibfd)->e_flags;
5241 out_flags = elf_elfheader (obfd)->e_flags;
5243 if (!elf_flags_init (obfd))
5245 /* If the input is the default architecture and had the default
5246 flags then do not bother setting the flags for the output
5247 architecture, instead allow future merges to do this. If no
5248 future merges ever set these flags then they will retain their
5249 uninitialised values, which surprise surprise, correspond
5250 to the default values. */
5251 if (bfd_get_arch_info (ibfd)->the_default
5252 && elf_elfheader (ibfd)->e_flags == 0)
5255 elf_flags_init (obfd) = TRUE;
5256 elf_elfheader (obfd)->e_flags = in_flags;
5258 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5259 && bfd_get_arch_info (obfd)->the_default)
5260 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
5261 bfd_get_mach (ibfd));
5266 /* Identical flags must be compatible. */
5267 if (in_flags == out_flags)
5270 /* Check to see if the input BFD actually contains any sections. If
5271 not, its flags may not have been initialised either, but it
5272 cannot actually cause any incompatiblity. Do not short-circuit
5273 dynamic objects; their section list may be emptied by
5274 elf_link_add_object_symbols.
5276 Also check to see if there are no code sections in the input.
5277 In this case there is no need to check for code specific flags.
5278 XXX - do we need to worry about floating-point format compatability
5279 in data sections ? */
5280 if (!(ibfd->flags & DYNAMIC))
5282 bfd_boolean null_input_bfd = TRUE;
5283 bfd_boolean only_data_sections = TRUE;
5285 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5287 if ((bfd_get_section_flags (ibfd, sec)
5288 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5289 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5290 only_data_sections = FALSE;
5292 null_input_bfd = FALSE;
5296 if (null_input_bfd || only_data_sections)
5300 return flags_compatible;
5303 /* Display the flags field. */
5306 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
5308 FILE *file = (FILE *) ptr;
5309 unsigned long flags;
5311 BFD_ASSERT (abfd != NULL && ptr != NULL);
5313 /* Print normal ELF private data. */
5314 _bfd_elf_print_private_bfd_data (abfd, ptr);
5316 flags = elf_elfheader (abfd)->e_flags;
5317 /* Ignore init flag - it may not be set, despite the flags field
5318 containing valid data. */
5320 /* xgettext:c-format */
5321 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5324 fprintf (file, _("<Unrecognised flag bits set>"));
5331 /* Update the got entry reference counts for the section being removed. */
5334 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
5335 struct bfd_link_info *info,
5337 const Elf_Internal_Rela * relocs)
5339 struct elf_aarch64_link_hash_table *htab;
5340 Elf_Internal_Shdr *symtab_hdr;
5341 struct elf_link_hash_entry **sym_hashes;
5342 struct elf_aarch64_local_symbol *locals;
5343 const Elf_Internal_Rela *rel, *relend;
5345 if (info->relocatable)
5348 htab = elf_aarch64_hash_table (info);
5353 elf_section_data (sec)->local_dynrel = NULL;
5355 symtab_hdr = &elf_symtab_hdr (abfd);
5356 sym_hashes = elf_sym_hashes (abfd);
5358 locals = elf_aarch64_locals (abfd);
5360 relend = relocs + sec->reloc_count;
5361 for (rel = relocs; rel < relend; rel++)
5363 unsigned long r_symndx;
5364 unsigned int r_type;
5365 struct elf_link_hash_entry *h = NULL;
5367 r_symndx = ELFNN_R_SYM (rel->r_info);
5369 if (r_symndx >= symtab_hdr->sh_info)
5372 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5373 while (h->root.type == bfd_link_hash_indirect
5374 || h->root.type == bfd_link_hash_warning)
5375 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5379 Elf_Internal_Sym *isym;
5381 /* A local symbol. */
5382 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5385 /* Check relocation against local STT_GNU_IFUNC symbol. */
5387 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5389 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
5397 struct elf_aarch64_link_hash_entry *eh;
5398 struct elf_dyn_relocs **pp;
5399 struct elf_dyn_relocs *p;
5401 eh = (struct elf_aarch64_link_hash_entry *) h;
5403 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5406 /* Everything must go for SEC. */
5412 r_type = ELFNN_R_TYPE (rel->r_info);
5413 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
5415 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5416 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5417 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5418 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5419 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5420 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5421 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5422 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5423 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5424 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5425 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5426 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5427 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5428 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5429 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5430 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5431 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5432 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5433 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5434 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5435 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5436 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5437 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5438 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5439 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5442 if (h->got.refcount > 0)
5443 h->got.refcount -= 1;
5445 if (h->type == STT_GNU_IFUNC)
5447 if (h->plt.refcount > 0)
5448 h->plt.refcount -= 1;
5451 else if (locals != NULL)
5453 if (locals[r_symndx].got_refcount > 0)
5454 locals[r_symndx].got_refcount -= 1;
5458 case BFD_RELOC_AARCH64_CALL26:
5459 case BFD_RELOC_AARCH64_JUMP26:
5460 /* If this is a local symbol then we resolve it
5461 directly without creating a PLT entry. */
5465 if (h->plt.refcount > 0)
5466 h->plt.refcount -= 1;
5469 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5470 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5471 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5472 case BFD_RELOC_AARCH64_MOVW_G3:
5473 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5474 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5475 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5476 case BFD_RELOC_AARCH64_NN:
5477 if (h != NULL && info->executable)
5479 if (h->plt.refcount > 0)
5480 h->plt.refcount -= 1;
5492 /* Adjust a symbol defined by a dynamic object and referenced by a
5493 regular object. The current definition is in some section of the
5494 dynamic object, but we're not including those sections. We have to
5495 change the definition to something the rest of the link can
5499 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
5500 struct elf_link_hash_entry *h)
5502 struct elf_aarch64_link_hash_table *htab;
5505 /* If this is a function, put it in the procedure linkage table. We
5506 will fill in the contents of the procedure linkage table later,
5507 when we know the address of the .got section. */
5508 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
5510 if (h->plt.refcount <= 0
5511 || (h->type != STT_GNU_IFUNC
5512 && (SYMBOL_CALLS_LOCAL (info, h)
5513 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5514 && h->root.type == bfd_link_hash_undefweak))))
5516 /* This case can occur if we saw a CALL26 reloc in
5517 an input file, but the symbol wasn't referred to
5518 by a dynamic object or all references were
5519 garbage collected. In which case we can end up
5521 h->plt.offset = (bfd_vma) - 1;
5528 /* It's possible that we incorrectly decided a .plt reloc was
5529 needed for an R_X86_64_PC32 reloc to a non-function sym in
5530 check_relocs. We can't decide accurately between function and
5531 non-function syms in check-relocs; Objects loaded later in
5532 the link may change h->type. So fix it now. */
5533 h->plt.offset = (bfd_vma) - 1;
5536 /* If this is a weak symbol, and there is a real definition, the
5537 processor independent code will have arranged for us to see the
5538 real definition first, and we can just use the same value. */
5539 if (h->u.weakdef != NULL)
5541 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5542 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5543 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5544 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5545 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
5546 h->non_got_ref = h->u.weakdef->non_got_ref;
5550 /* If we are creating a shared library, we must presume that the
5551 only references to the symbol are via the global offset table.
5552 For such cases we need not do anything here; the relocations will
5553 be handled correctly by relocate_section. */
5557 /* If there are no references to this symbol that do not use the
5558 GOT, we don't need to generate a copy reloc. */
5559 if (!h->non_got_ref)
5562 /* If -z nocopyreloc was given, we won't generate them either. */
5563 if (info->nocopyreloc)
5569 /* We must allocate the symbol in our .dynbss section, which will
5570 become part of the .bss section of the executable. There will be
5571 an entry for this symbol in the .dynsym section. The dynamic
5572 object will contain position independent code, so all references
5573 from the dynamic object to this symbol will go through the global
5574 offset table. The dynamic linker will use the .dynsym entry to
5575 determine the address it must put in the global offset table, so
5576 both the dynamic object and the regular object will refer to the
5577 same memory location for the variable. */
5579 htab = elf_aarch64_hash_table (info);
5581 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
5582 to copy the initial value out of the dynamic object and into the
5583 runtime process image. */
5584 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5586 htab->srelbss->size += RELOC_SIZE (htab);
5592 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5597 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
5599 struct elf_aarch64_local_symbol *locals;
5600 locals = elf_aarch64_locals (abfd);
5603 locals = (struct elf_aarch64_local_symbol *)
5604 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
5607 elf_aarch64_locals (abfd) = locals;
5612 /* Create the .got section to hold the global offset table. */
5615 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
5617 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5620 struct elf_link_hash_entry *h;
5621 struct elf_link_hash_table *htab = elf_hash_table (info);
5623 /* This function may be called more than once. */
5624 s = bfd_get_linker_section (abfd, ".got");
5628 flags = bed->dynamic_sec_flags;
5630 s = bfd_make_section_anyway_with_flags (abfd,
5631 (bed->rela_plts_and_copies_p
5632 ? ".rela.got" : ".rel.got"),
5633 (bed->dynamic_sec_flags
5636 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
5640 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
5642 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
5645 htab->sgot->size += GOT_ENTRY_SIZE;
5647 if (bed->want_got_sym)
5649 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
5650 (or .got.plt) section. We don't do this in the linker script
5651 because we don't want to define the symbol if we are not creating
5652 a global offset table. */
5653 h = _bfd_elf_define_linkage_sym (abfd, info, s,
5654 "_GLOBAL_OFFSET_TABLE_");
5655 elf_hash_table (info)->hgot = h;
5660 if (bed->want_got_plt)
5662 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
5664 || !bfd_set_section_alignment (abfd, s,
5665 bed->s->log_file_align))
5670 /* The first bit of the global offset table is the header. */
5671 s->size += bed->got_header_size;
5676 /* Look through the relocs for a section during the first phase. */
5679 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
5680 asection *sec, const Elf_Internal_Rela *relocs)
5682 Elf_Internal_Shdr *symtab_hdr;
5683 struct elf_link_hash_entry **sym_hashes;
5684 const Elf_Internal_Rela *rel;
5685 const Elf_Internal_Rela *rel_end;
5688 struct elf_aarch64_link_hash_table *htab;
5690 if (info->relocatable)
5693 BFD_ASSERT (is_aarch64_elf (abfd));
5695 htab = elf_aarch64_hash_table (info);
5698 symtab_hdr = &elf_symtab_hdr (abfd);
5699 sym_hashes = elf_sym_hashes (abfd);
5701 rel_end = relocs + sec->reloc_count;
5702 for (rel = relocs; rel < rel_end; rel++)
5704 struct elf_link_hash_entry *h;
5705 unsigned long r_symndx;
5706 unsigned int r_type;
5707 bfd_reloc_code_real_type bfd_r_type;
5708 Elf_Internal_Sym *isym;
5710 r_symndx = ELFNN_R_SYM (rel->r_info);
5711 r_type = ELFNN_R_TYPE (rel->r_info);
5713 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
5715 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
5720 if (r_symndx < symtab_hdr->sh_info)
5722 /* A local symbol. */
5723 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5728 /* Check relocation against local STT_GNU_IFUNC symbol. */
5729 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5731 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
5736 /* Fake a STT_GNU_IFUNC symbol. */
5737 h->type = STT_GNU_IFUNC;
5740 h->forced_local = 1;
5741 h->root.type = bfd_link_hash_defined;
5748 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5749 while (h->root.type == bfd_link_hash_indirect
5750 || h->root.type == bfd_link_hash_warning)
5751 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5753 /* PR15323, ref flags aren't set for references in the same
5755 h->root.non_ir_ref = 1;
5758 /* Could be done earlier, if h were already available. */
5759 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
5763 /* Create the ifunc sections for static executables. If we
5764 never see an indirect function symbol nor we are building
5765 a static executable, those sections will be empty and
5766 won't appear in output. */
5772 case BFD_RELOC_AARCH64_NN:
5773 case BFD_RELOC_AARCH64_CALL26:
5774 case BFD_RELOC_AARCH64_JUMP26:
5775 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5776 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5777 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5778 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5779 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5780 case BFD_RELOC_AARCH64_ADD_LO12:
5781 if (htab->root.dynobj == NULL)
5782 htab->root.dynobj = abfd;
5783 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
5788 /* It is referenced by a non-shared object. */
5790 h->root.non_ir_ref = 1;
5795 case BFD_RELOC_AARCH64_NN:
5797 /* We don't need to handle relocs into sections not going into
5798 the "real" output. */
5799 if ((sec->flags & SEC_ALLOC) == 0)
5807 h->plt.refcount += 1;
5808 h->pointer_equality_needed = 1;
5811 /* No need to do anything if we're not creating a shared
5817 struct elf_dyn_relocs *p;
5818 struct elf_dyn_relocs **head;
5820 /* We must copy these reloc types into the output file.
5821 Create a reloc section in dynobj and make room for
5825 if (htab->root.dynobj == NULL)
5826 htab->root.dynobj = abfd;
5828 sreloc = _bfd_elf_make_dynamic_reloc_section
5829 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
5835 /* If this is a global symbol, we count the number of
5836 relocations we need for this symbol. */
5839 struct elf_aarch64_link_hash_entry *eh;
5840 eh = (struct elf_aarch64_link_hash_entry *) h;
5841 head = &eh->dyn_relocs;
5845 /* Track dynamic relocs needed for local syms too.
5846 We really need local syms available to do this
5852 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5857 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5861 /* Beware of type punned pointers vs strict aliasing
5863 vpp = &(elf_section_data (s)->local_dynrel);
5864 head = (struct elf_dyn_relocs **) vpp;
5868 if (p == NULL || p->sec != sec)
5870 bfd_size_type amt = sizeof *p;
5871 p = ((struct elf_dyn_relocs *)
5872 bfd_zalloc (htab->root.dynobj, amt));
5885 /* RR: We probably want to keep a consistency check that
5886 there are no dangling GOT_PAGE relocs. */
5887 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5888 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5889 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5890 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5891 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5892 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5893 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5894 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5895 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5896 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5897 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5898 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5899 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5900 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5901 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5902 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5903 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5904 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5905 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5906 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5907 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5908 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5909 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5910 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5911 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5914 unsigned old_got_type;
5916 got_type = aarch64_reloc_got_type (bfd_r_type);
5920 h->got.refcount += 1;
5921 old_got_type = elf_aarch64_hash_entry (h)->got_type;
5925 struct elf_aarch64_local_symbol *locals;
5927 if (!elfNN_aarch64_allocate_local_symbols
5928 (abfd, symtab_hdr->sh_info))
5931 locals = elf_aarch64_locals (abfd);
5932 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
5933 locals[r_symndx].got_refcount += 1;
5934 old_got_type = locals[r_symndx].got_type;
5937 /* If a variable is accessed with both general dynamic TLS
5938 methods, two slots may be created. */
5939 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
5940 got_type |= old_got_type;
5942 /* We will already have issued an error message if there
5943 is a TLS/non-TLS mismatch, based on the symbol type.
5944 So just combine any TLS types needed. */
5945 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
5946 && got_type != GOT_NORMAL)
5947 got_type |= old_got_type;
5949 /* If the symbol is accessed by both IE and GD methods, we
5950 are able to relax. Turn off the GD flag, without
5951 messing up with any other kind of TLS types that may be
5953 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
5954 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
5956 if (old_got_type != got_type)
5959 elf_aarch64_hash_entry (h)->got_type = got_type;
5962 struct elf_aarch64_local_symbol *locals;
5963 locals = elf_aarch64_locals (abfd);
5964 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
5965 locals[r_symndx].got_type = got_type;
5969 if (htab->root.dynobj == NULL)
5970 htab->root.dynobj = abfd;
5971 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
5976 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5977 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5978 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5979 case BFD_RELOC_AARCH64_MOVW_G3:
5982 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5983 (*_bfd_error_handler)
5984 (_("%B: relocation %s against `%s' can not be used when making "
5985 "a shared object; recompile with -fPIC"),
5986 abfd, elfNN_aarch64_howto_table[howto_index].name,
5987 (h) ? h->root.root.string : "a local symbol");
5988 bfd_set_error (bfd_error_bad_value);
5992 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5993 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5994 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5995 if (h != NULL && info->executable)
5997 /* If this reloc is in a read-only section, we might
5998 need a copy reloc. We can't check reliably at this
5999 stage whether the section is read-only, as input
6000 sections have not yet been mapped to output sections.
6001 Tentatively set the flag for now, and correct in
6002 adjust_dynamic_symbol. */
6004 h->plt.refcount += 1;
6005 h->pointer_equality_needed = 1;
6007 /* FIXME:: RR need to handle these in shared libraries
6008 and essentially bomb out as these being non-PIC
6009 relocations in shared libraries. */
6012 case BFD_RELOC_AARCH64_CALL26:
6013 case BFD_RELOC_AARCH64_JUMP26:
6014 /* If this is a local symbol then we resolve it
6015 directly without creating a PLT entry. */
6020 if (h->plt.refcount <= 0)
6021 h->plt.refcount = 1;
6023 h->plt.refcount += 1;
6034 /* Treat mapping symbols as special target symbols. */
6037 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
6040 return bfd_is_aarch64_special_symbol_name (sym->name,
6041 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
6044 /* This is a copy of elf_find_function () from elf.c except that
6045 AArch64 mapping symbols are ignored when looking for function names. */
6048 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6052 const char **filename_ptr,
6053 const char **functionname_ptr)
6055 const char *filename = NULL;
6056 asymbol *func = NULL;
6057 bfd_vma low_func = 0;
6060 for (p = symbols; *p != NULL; p++)
6064 q = (elf_symbol_type *) * p;
6066 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6071 filename = bfd_asymbol_name (&q->symbol);
6075 /* Skip mapping symbols. */
6076 if ((q->symbol.flags & BSF_LOCAL)
6077 && (bfd_is_aarch64_special_symbol_name
6078 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
6081 if (bfd_get_section (&q->symbol) == section
6082 && q->symbol.value >= low_func && q->symbol.value <= offset)
6084 func = (asymbol *) q;
6085 low_func = q->symbol.value;
6095 *filename_ptr = filename;
6096 if (functionname_ptr)
6097 *functionname_ptr = bfd_asymbol_name (func);
6103 /* Find the nearest line to a particular section and offset, for error
6104 reporting. This code is a duplicate of the code in elf.c, except
6105 that it uses aarch64_elf_find_function. */
6108 elfNN_aarch64_find_nearest_line (bfd *abfd,
6112 const char **filename_ptr,
6113 const char **functionname_ptr,
6114 unsigned int *line_ptr,
6115 unsigned int *discriminator_ptr)
6117 bfd_boolean found = FALSE;
6119 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6120 filename_ptr, functionname_ptr,
6121 line_ptr, discriminator_ptr,
6122 dwarf_debug_sections, 0,
6123 &elf_tdata (abfd)->dwarf2_find_line_info))
6125 if (!*functionname_ptr)
6126 aarch64_elf_find_function (abfd, symbols, section, offset,
6127 *filename_ptr ? NULL : filename_ptr,
6133 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
6134 toolchain uses DWARF1. */
6136 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6137 &found, filename_ptr,
6138 functionname_ptr, line_ptr,
6139 &elf_tdata (abfd)->line_info))
6142 if (found && (*functionname_ptr || *line_ptr))
6145 if (symbols == NULL)
6148 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
6149 filename_ptr, functionname_ptr))
6157 elfNN_aarch64_find_inliner_info (bfd *abfd,
6158 const char **filename_ptr,
6159 const char **functionname_ptr,
6160 unsigned int *line_ptr)
6163 found = _bfd_dwarf2_find_inliner_info
6164 (abfd, filename_ptr,
6165 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
6171 elfNN_aarch64_post_process_headers (bfd *abfd,
6172 struct bfd_link_info *link_info)
6174 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
6176 i_ehdrp = elf_elfheader (abfd);
6177 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
6179 _bfd_elf_post_process_headers (abfd, link_info);
6182 static enum elf_reloc_type_class
6183 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6184 const asection *rel_sec ATTRIBUTE_UNUSED,
6185 const Elf_Internal_Rela *rela)
6187 switch ((int) ELFNN_R_TYPE (rela->r_info))
6189 case AARCH64_R (RELATIVE):
6190 return reloc_class_relative;
6191 case AARCH64_R (JUMP_SLOT):
6192 return reloc_class_plt;
6193 case AARCH64_R (COPY):
6194 return reloc_class_copy;
6196 return reloc_class_normal;
6200 /* Handle an AArch64 specific section when reading an object file. This is
6201 called when bfd_section_from_shdr finds a section with an unknown
6205 elfNN_aarch64_section_from_shdr (bfd *abfd,
6206 Elf_Internal_Shdr *hdr,
6207 const char *name, int shindex)
6209 /* There ought to be a place to keep ELF backend specific flags, but
6210 at the moment there isn't one. We just keep track of the
6211 sections by their name, instead. Fortunately, the ABI gives
6212 names for all the AArch64 specific sections, so we will probably get
6214 switch (hdr->sh_type)
6216 case SHT_AARCH64_ATTRIBUTES:
6223 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6229 /* A structure used to record a list of sections, independently
6230 of the next and prev fields in the asection structure. */
6231 typedef struct section_list
6234 struct section_list *next;
6235 struct section_list *prev;
6239 /* Unfortunately we need to keep a list of sections for which
6240 an _aarch64_elf_section_data structure has been allocated. This
6241 is because it is possible for functions like elfNN_aarch64_write_section
6242 to be called on a section which has had an elf_data_structure
6243 allocated for it (and so the used_by_bfd field is valid) but
6244 for which the AArch64 extended version of this structure - the
6245 _aarch64_elf_section_data structure - has not been allocated. */
6246 static section_list *sections_with_aarch64_elf_section_data = NULL;
6249 record_section_with_aarch64_elf_section_data (asection *sec)
6251 struct section_list *entry;
6253 entry = bfd_malloc (sizeof (*entry));
6257 entry->next = sections_with_aarch64_elf_section_data;
6259 if (entry->next != NULL)
6260 entry->next->prev = entry;
6261 sections_with_aarch64_elf_section_data = entry;
6264 static struct section_list *
6265 find_aarch64_elf_section_entry (asection *sec)
6267 struct section_list *entry;
6268 static struct section_list *last_entry = NULL;
6270 /* This is a short cut for the typical case where the sections are added
6271 to the sections_with_aarch64_elf_section_data list in forward order and
6272 then looked up here in backwards order. This makes a real difference
6273 to the ld-srec/sec64k.exp linker test. */
6274 entry = sections_with_aarch64_elf_section_data;
6275 if (last_entry != NULL)
6277 if (last_entry->sec == sec)
6279 else if (last_entry->next != NULL && last_entry->next->sec == sec)
6280 entry = last_entry->next;
6283 for (; entry; entry = entry->next)
6284 if (entry->sec == sec)
6288 /* Record the entry prior to this one - it is the entry we are
6289 most likely to want to locate next time. Also this way if we
6290 have been called from
6291 unrecord_section_with_aarch64_elf_section_data () we will not
6292 be caching a pointer that is about to be freed. */
6293 last_entry = entry->prev;
6299 unrecord_section_with_aarch64_elf_section_data (asection *sec)
6301 struct section_list *entry;
6303 entry = find_aarch64_elf_section_entry (sec);
6307 if (entry->prev != NULL)
6308 entry->prev->next = entry->next;
6309 if (entry->next != NULL)
6310 entry->next->prev = entry->prev;
6311 if (entry == sections_with_aarch64_elf_section_data)
6312 sections_with_aarch64_elf_section_data = entry->next;
6321 struct bfd_link_info *info;
6324 int (*func) (void *, const char *, Elf_Internal_Sym *,
6325 asection *, struct elf_link_hash_entry *);
6326 } output_arch_syminfo;
6328 enum map_symbol_type
6335 /* Output a single mapping symbol. */
6338 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
6339 enum map_symbol_type type, bfd_vma offset)
6341 static const char *names[2] = { "$x", "$d" };
6342 Elf_Internal_Sym sym;
6344 sym.st_value = (osi->sec->output_section->vma
6345 + osi->sec->output_offset + offset);
6348 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6349 sym.st_shndx = osi->sec_shndx;
6350 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
6355 /* Output mapping symbols for PLT entries associated with H. */
6358 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
6360 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
6363 if (h->root.type == bfd_link_hash_indirect)
6366 if (h->root.type == bfd_link_hash_warning)
6367 /* When warning symbols are created, they **replace** the "real"
6368 entry in the hash table, thus we never get to see the real
6369 symbol in a hash traversal. So look at it now. */
6370 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6372 if (h->plt.offset == (bfd_vma) - 1)
6375 addr = h->plt.offset;
6378 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6385 /* Output a single local symbol for a generated stub. */
6388 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
6389 bfd_vma offset, bfd_vma size)
6391 Elf_Internal_Sym sym;
6393 sym.st_value = (osi->sec->output_section->vma
6394 + osi->sec->output_offset + offset);
6397 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6398 sym.st_shndx = osi->sec_shndx;
6399 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
6403 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6405 struct elf_aarch64_stub_hash_entry *stub_entry;
6409 output_arch_syminfo *osi;
6411 /* Massage our args to the form they really have. */
6412 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
6413 osi = (output_arch_syminfo *) in_arg;
6415 stub_sec = stub_entry->stub_sec;
6417 /* Ensure this stub is attached to the current section being
6419 if (stub_sec != osi->sec)
6422 addr = (bfd_vma) stub_entry->stub_offset;
6424 stub_name = stub_entry->output_name;
6426 switch (stub_entry->stub_type)
6428 case aarch64_stub_adrp_branch:
6429 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
6430 sizeof (aarch64_adrp_branch_stub)))
6432 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6435 case aarch64_stub_long_branch:
6436 if (!elfNN_aarch64_output_stub_sym
6437 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
6439 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6441 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
6444 case aarch64_stub_erratum_835769_veneer:
6445 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
6446 sizeof (aarch64_erratum_835769_stub)))
6448 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6458 /* Output mapping symbols for linker generated sections. */
6461 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
6462 struct bfd_link_info *info,
6464 int (*func) (void *, const char *,
6467 struct elf_link_hash_entry
6470 output_arch_syminfo osi;
6471 struct elf_aarch64_link_hash_table *htab;
6473 htab = elf_aarch64_hash_table (info);
6479 /* Long calls stubs. */
6480 if (htab->stub_bfd && htab->stub_bfd->sections)
6484 for (stub_sec = htab->stub_bfd->sections;
6485 stub_sec != NULL; stub_sec = stub_sec->next)
6487 /* Ignore non-stub sections. */
6488 if (!strstr (stub_sec->name, STUB_SUFFIX))
6493 osi.sec_shndx = _bfd_elf_section_from_bfd_section
6494 (output_bfd, osi.sec->output_section);
6496 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
6501 /* Finally, output mapping symbols for the PLT. */
6502 if (!htab->root.splt || htab->root.splt->size == 0)
6505 /* For now live without mapping symbols for the plt. */
6506 osi.sec_shndx = _bfd_elf_section_from_bfd_section
6507 (output_bfd, htab->root.splt->output_section);
6508 osi.sec = htab->root.splt;
6510 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
6517 /* Allocate target specific section data. */
6520 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
6522 if (!sec->used_by_bfd)
6524 _aarch64_elf_section_data *sdata;
6525 bfd_size_type amt = sizeof (*sdata);
6527 sdata = bfd_zalloc (abfd, amt);
6530 sec->used_by_bfd = sdata;
6533 record_section_with_aarch64_elf_section_data (sec);
6535 return _bfd_elf_new_section_hook (abfd, sec);
6540 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
6542 void *ignore ATTRIBUTE_UNUSED)
6544 unrecord_section_with_aarch64_elf_section_data (sec);
6548 elfNN_aarch64_close_and_cleanup (bfd *abfd)
6551 bfd_map_over_sections (abfd,
6552 unrecord_section_via_map_over_sections, NULL);
6554 return _bfd_elf_close_and_cleanup (abfd);
6558 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
6561 bfd_map_over_sections (abfd,
6562 unrecord_section_via_map_over_sections, NULL);
6564 return _bfd_free_cached_info (abfd);
6567 /* Create dynamic sections. This is different from the ARM backend in that
6568 the got, plt, gotplt and their relocation sections are all created in the
6569 standard part of the bfd elf backend. */
6572 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
6573 struct bfd_link_info *info)
6575 struct elf_aarch64_link_hash_table *htab;
6577 /* We need to create .got section. */
6578 if (!aarch64_elf_create_got_section (dynobj, info))
6581 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
6584 htab = elf_aarch64_hash_table (info);
6585 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
6587 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
6589 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
6596 /* Allocate space in .plt, .got and associated reloc sections for
6600 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6602 struct bfd_link_info *info;
6603 struct elf_aarch64_link_hash_table *htab;
6604 struct elf_aarch64_link_hash_entry *eh;
6605 struct elf_dyn_relocs *p;
6607 /* An example of a bfd_link_hash_indirect symbol is versioned
6608 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6609 -> __gxx_personality_v0(bfd_link_hash_defined)
6611 There is no need to process bfd_link_hash_indirect symbols here
6612 because we will also be presented with the concrete instance of
6613 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6614 called to copy all relevant data from the generic to the concrete
6617 if (h->root.type == bfd_link_hash_indirect)
6620 if (h->root.type == bfd_link_hash_warning)
6621 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6623 info = (struct bfd_link_info *) inf;
6624 htab = elf_aarch64_hash_table (info);
6626 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6627 here if it is defined and referenced in a non-shared object. */
6628 if (h->type == STT_GNU_IFUNC
6631 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
6633 /* Make sure this symbol is output as a dynamic symbol.
6634 Undefined weak syms won't yet be marked as dynamic. */
6635 if (h->dynindx == -1 && !h->forced_local)
6637 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6641 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
6643 asection *s = htab->root.splt;
6645 /* If this is the first .plt entry, make room for the special
6648 s->size += htab->plt_header_size;
6650 h->plt.offset = s->size;
6652 /* If this symbol is not defined in a regular file, and we are
6653 not generating a shared library, then set the symbol to this
6654 location in the .plt. This is required to make function
6655 pointers compare as equal between the normal executable and
6656 the shared library. */
6657 if (!info->shared && !h->def_regular)
6659 h->root.u.def.section = s;
6660 h->root.u.def.value = h->plt.offset;
6663 /* Make room for this entry. For now we only create the
6664 small model PLT entries. We later need to find a way
6665 of relaxing into these from the large model PLT entries. */
6666 s->size += PLT_SMALL_ENTRY_SIZE;
6668 /* We also need to make an entry in the .got.plt section, which
6669 will be placed in the .got section by the linker script. */
6670 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
6672 /* We also need to make an entry in the .rela.plt section. */
6673 htab->root.srelplt->size += RELOC_SIZE (htab);
6675 /* We need to ensure that all GOT entries that serve the PLT
6676 are consecutive with the special GOT slots [0] [1] and
6677 [2]. Any addtional relocations, such as
6678 R_AARCH64_TLSDESC, must be placed after the PLT related
6679 entries. We abuse the reloc_count such that during
6680 sizing we adjust reloc_count to indicate the number of
6681 PLT related reserved entries. In subsequent phases when
6682 filling in the contents of the reloc entries, PLT related
6683 entries are placed by computing their PLT index (0
6684 .. reloc_count). While other none PLT relocs are placed
6685 at the slot indicated by reloc_count and reloc_count is
6688 htab->root.srelplt->reloc_count++;
6692 h->plt.offset = (bfd_vma) - 1;
6698 h->plt.offset = (bfd_vma) - 1;
6702 eh = (struct elf_aarch64_link_hash_entry *) h;
6703 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
6705 if (h->got.refcount > 0)
6708 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
6710 h->got.offset = (bfd_vma) - 1;
6712 dyn = htab->root.dynamic_sections_created;
6714 /* Make sure this symbol is output as a dynamic symbol.
6715 Undefined weak syms won't yet be marked as dynamic. */
6716 if (dyn && h->dynindx == -1 && !h->forced_local)
6718 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6722 if (got_type == GOT_UNKNOWN)
6725 else if (got_type == GOT_NORMAL)
6727 h->got.offset = htab->root.sgot->size;
6728 htab->root.sgot->size += GOT_ENTRY_SIZE;
6729 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6730 || h->root.type != bfd_link_hash_undefweak)
6732 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6734 htab->root.srelgot->size += RELOC_SIZE (htab);
6740 if (got_type & GOT_TLSDESC_GD)
6742 eh->tlsdesc_got_jump_table_offset =
6743 (htab->root.sgotplt->size
6744 - aarch64_compute_jump_table_size (htab));
6745 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
6746 h->got.offset = (bfd_vma) - 2;
6749 if (got_type & GOT_TLS_GD)
6751 h->got.offset = htab->root.sgot->size;
6752 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
6755 if (got_type & GOT_TLS_IE)
6757 h->got.offset = htab->root.sgot->size;
6758 htab->root.sgot->size += GOT_ENTRY_SIZE;
6761 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6762 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6763 || h->root.type != bfd_link_hash_undefweak)
6766 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6768 if (got_type & GOT_TLSDESC_GD)
6770 htab->root.srelplt->size += RELOC_SIZE (htab);
6771 /* Note reloc_count not incremented here! We have
6772 already adjusted reloc_count for this relocation
6775 /* TLSDESC PLT is now needed, but not yet determined. */
6776 htab->tlsdesc_plt = (bfd_vma) - 1;
6779 if (got_type & GOT_TLS_GD)
6780 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
6782 if (got_type & GOT_TLS_IE)
6783 htab->root.srelgot->size += RELOC_SIZE (htab);
6789 h->got.offset = (bfd_vma) - 1;
6792 if (eh->dyn_relocs == NULL)
6795 /* In the shared -Bsymbolic case, discard space allocated for
6796 dynamic pc-relative relocs against symbols which turn out to be
6797 defined in regular objects. For the normal shared case, discard
6798 space for pc-relative relocs that have become local due to symbol
6799 visibility changes. */
6803 /* Relocs that use pc_count are those that appear on a call
6804 insn, or certain REL relocs that can generated via assembly.
6805 We want calls to protected symbols to resolve directly to the
6806 function rather than going via the plt. If people want
6807 function pointer comparisons to work as expected then they
6808 should avoid writing weird assembly. */
6809 if (SYMBOL_CALLS_LOCAL (info, h))
6811 struct elf_dyn_relocs **pp;
6813 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
6815 p->count -= p->pc_count;
6824 /* Also discard relocs on undefined weak syms with non-default
6826 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
6828 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6829 eh->dyn_relocs = NULL;
6831 /* Make sure undefined weak symbols are output as a dynamic
6833 else if (h->dynindx == -1
6835 && !bfd_elf_link_record_dynamic_symbol (info, h))
6840 else if (ELIMINATE_COPY_RELOCS)
6842 /* For the non-shared case, discard space for relocs against
6843 symbols which turn out to need copy relocs or are not
6849 || (htab->root.dynamic_sections_created
6850 && (h->root.type == bfd_link_hash_undefweak
6851 || h->root.type == bfd_link_hash_undefined))))
6853 /* Make sure this symbol is output as a dynamic symbol.
6854 Undefined weak syms won't yet be marked as dynamic. */
6855 if (h->dynindx == -1
6857 && !bfd_elf_link_record_dynamic_symbol (info, h))
6860 /* If that succeeded, we know we'll be keeping all the
6862 if (h->dynindx != -1)
6866 eh->dyn_relocs = NULL;
6871 /* Finally, allocate space. */
6872 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6876 sreloc = elf_section_data (p->sec)->sreloc;
6878 BFD_ASSERT (sreloc != NULL);
6880 sreloc->size += p->count * RELOC_SIZE (htab);
6886 /* Allocate space in .plt, .got and associated reloc sections for
6887 ifunc dynamic relocs. */
6890 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
6893 struct bfd_link_info *info;
6894 struct elf_aarch64_link_hash_table *htab;
6895 struct elf_aarch64_link_hash_entry *eh;
6897 /* An example of a bfd_link_hash_indirect symbol is versioned
6898 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6899 -> __gxx_personality_v0(bfd_link_hash_defined)
6901 There is no need to process bfd_link_hash_indirect symbols here
6902 because we will also be presented with the concrete instance of
6903 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6904 called to copy all relevant data from the generic to the concrete
6907 if (h->root.type == bfd_link_hash_indirect)
6910 if (h->root.type == bfd_link_hash_warning)
6911 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6913 info = (struct bfd_link_info *) inf;
6914 htab = elf_aarch64_hash_table (info);
6916 eh = (struct elf_aarch64_link_hash_entry *) h;
6918 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6919 here if it is defined and referenced in a non-shared object. */
6920 if (h->type == STT_GNU_IFUNC
6922 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
6924 htab->plt_entry_size,
6925 htab->plt_header_size,
6930 /* Allocate space in .plt, .got and associated reloc sections for
6931 local dynamic relocs. */
6934 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
6936 struct elf_link_hash_entry *h
6937 = (struct elf_link_hash_entry *) *slot;
6939 if (h->type != STT_GNU_IFUNC
6943 || h->root.type != bfd_link_hash_defined)
6946 return elfNN_aarch64_allocate_dynrelocs (h, inf);
6949 /* Allocate space in .plt, .got and associated reloc sections for
6950 local ifunc dynamic relocs. */
6953 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
6955 struct elf_link_hash_entry *h
6956 = (struct elf_link_hash_entry *) *slot;
6958 if (h->type != STT_GNU_IFUNC
6962 || h->root.type != bfd_link_hash_defined)
6965 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
6968 /* This is the most important function of all . Innocuosly named
6971 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6972 struct bfd_link_info *info)
6974 struct elf_aarch64_link_hash_table *htab;
6980 htab = elf_aarch64_hash_table ((info));
6981 dynobj = htab->root.dynobj;
6983 BFD_ASSERT (dynobj != NULL);
6985 if (htab->root.dynamic_sections_created)
6987 if (info->executable)
6989 s = bfd_get_linker_section (dynobj, ".interp");
6992 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6993 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6997 /* Set up .got offsets for local syms, and space for local dynamic
6999 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7001 struct elf_aarch64_local_symbol *locals = NULL;
7002 Elf_Internal_Shdr *symtab_hdr;
7006 if (!is_aarch64_elf (ibfd))
7009 for (s = ibfd->sections; s != NULL; s = s->next)
7011 struct elf_dyn_relocs *p;
7013 for (p = (struct elf_dyn_relocs *)
7014 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
7016 if (!bfd_is_abs_section (p->sec)
7017 && bfd_is_abs_section (p->sec->output_section))
7019 /* Input section has been discarded, either because
7020 it is a copy of a linkonce section or due to
7021 linker script /DISCARD/, so we'll be discarding
7024 else if (p->count != 0)
7026 srel = elf_section_data (p->sec)->sreloc;
7027 srel->size += p->count * RELOC_SIZE (htab);
7028 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7029 info->flags |= DF_TEXTREL;
7034 locals = elf_aarch64_locals (ibfd);
7038 symtab_hdr = &elf_symtab_hdr (ibfd);
7039 srel = htab->root.srelgot;
7040 for (i = 0; i < symtab_hdr->sh_info; i++)
7042 locals[i].got_offset = (bfd_vma) - 1;
7043 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7044 if (locals[i].got_refcount > 0)
7046 unsigned got_type = locals[i].got_type;
7047 if (got_type & GOT_TLSDESC_GD)
7049 locals[i].tlsdesc_got_jump_table_offset =
7050 (htab->root.sgotplt->size
7051 - aarch64_compute_jump_table_size (htab));
7052 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7053 locals[i].got_offset = (bfd_vma) - 2;
7056 if (got_type & GOT_TLS_GD)
7058 locals[i].got_offset = htab->root.sgot->size;
7059 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7062 if (got_type & GOT_TLS_IE)
7064 locals[i].got_offset = htab->root.sgot->size;
7065 htab->root.sgot->size += GOT_ENTRY_SIZE;
7068 if (got_type == GOT_UNKNOWN)
7072 if (got_type == GOT_NORMAL)
7078 if (got_type & GOT_TLSDESC_GD)
7080 htab->root.srelplt->size += RELOC_SIZE (htab);
7081 /* Note RELOC_COUNT not incremented here! */
7082 htab->tlsdesc_plt = (bfd_vma) - 1;
7085 if (got_type & GOT_TLS_GD)
7086 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7088 if (got_type & GOT_TLS_IE)
7089 htab->root.srelgot->size += RELOC_SIZE (htab);
7094 locals[i].got_refcount = (bfd_vma) - 1;
7100 /* Allocate global sym .plt and .got entries, and space for global
7101 sym dynamic relocs. */
7102 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
7105 /* Allocate global ifunc sym .plt and .got entries, and space for global
7106 ifunc sym dynamic relocs. */
7107 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
7110 /* Allocate .plt and .got entries, and space for local symbols. */
7111 htab_traverse (htab->loc_hash_table,
7112 elfNN_aarch64_allocate_local_dynrelocs,
7115 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
7116 htab_traverse (htab->loc_hash_table,
7117 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
7120 /* For every jump slot reserved in the sgotplt, reloc_count is
7121 incremented. However, when we reserve space for TLS descriptors,
7122 it's not incremented, so in order to compute the space reserved
7123 for them, it suffices to multiply the reloc count by the jump
7126 if (htab->root.srelplt)
7127 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
7129 if (htab->tlsdesc_plt)
7131 if (htab->root.splt->size == 0)
7132 htab->root.splt->size += PLT_ENTRY_SIZE;
7134 htab->tlsdesc_plt = htab->root.splt->size;
7135 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
7137 /* If we're not using lazy TLS relocations, don't generate the
7138 GOT entry required. */
7139 if (!(info->flags & DF_BIND_NOW))
7141 htab->dt_tlsdesc_got = htab->root.sgot->size;
7142 htab->root.sgot->size += GOT_ENTRY_SIZE;
7146 /* Init mapping symbols information to use later to distingush between
7147 code and data while scanning for erratam 835769. */
7148 if (htab->fix_erratum_835769)
7149 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7151 if (!is_aarch64_elf (ibfd))
7153 bfd_elfNN_aarch64_init_maps (ibfd);
7156 /* We now have determined the sizes of the various dynamic sections.
7157 Allocate memory for them. */
7159 for (s = dynobj->sections; s != NULL; s = s->next)
7161 if ((s->flags & SEC_LINKER_CREATED) == 0)
7164 if (s == htab->root.splt
7165 || s == htab->root.sgot
7166 || s == htab->root.sgotplt
7167 || s == htab->root.iplt
7168 || s == htab->root.igotplt || s == htab->sdynbss)
7170 /* Strip this section if we don't need it; see the
7173 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7175 if (s->size != 0 && s != htab->root.srelplt)
7178 /* We use the reloc_count field as a counter if we need
7179 to copy relocs into the output file. */
7180 if (s != htab->root.srelplt)
7185 /* It's not one of our sections, so don't allocate space. */
7191 /* If we don't need this section, strip it from the
7192 output file. This is mostly to handle .rela.bss and
7193 .rela.plt. We must create both sections in
7194 create_dynamic_sections, because they must be created
7195 before the linker maps input sections to output
7196 sections. The linker does that before
7197 adjust_dynamic_symbol is called, and it is that
7198 function which decides whether anything needs to go
7199 into these sections. */
7201 s->flags |= SEC_EXCLUDE;
7205 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7208 /* Allocate memory for the section contents. We use bfd_zalloc
7209 here in case unused entries are not reclaimed before the
7210 section's contents are written out. This should not happen,
7211 but this way if it does, we get a R_AARCH64_NONE reloc instead
7213 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
7214 if (s->contents == NULL)
7218 if (htab->root.dynamic_sections_created)
7220 /* Add some entries to the .dynamic section. We fill in the
7221 values later, in elfNN_aarch64_finish_dynamic_sections, but we
7222 must add the entries now so that we get the correct size for
7223 the .dynamic section. The DT_DEBUG entry is filled in by the
7224 dynamic linker and used by the debugger. */
7225 #define add_dynamic_entry(TAG, VAL) \
7226 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7228 if (info->executable)
7230 if (!add_dynamic_entry (DT_DEBUG, 0))
7234 if (htab->root.splt->size != 0)
7236 if (!add_dynamic_entry (DT_PLTGOT, 0)
7237 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7238 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7239 || !add_dynamic_entry (DT_JMPREL, 0))
7242 if (htab->tlsdesc_plt
7243 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
7244 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
7250 if (!add_dynamic_entry (DT_RELA, 0)
7251 || !add_dynamic_entry (DT_RELASZ, 0)
7252 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
7255 /* If any dynamic relocs apply to a read-only section,
7256 then we need a DT_TEXTREL entry. */
7257 if ((info->flags & DF_TEXTREL) != 0)
7259 if (!add_dynamic_entry (DT_TEXTREL, 0))
7264 #undef add_dynamic_entry
7270 elf_aarch64_update_plt_entry (bfd *output_bfd,
7271 bfd_reloc_code_real_type r_type,
7272 bfd_byte *plt_entry, bfd_vma value)
7274 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
7276 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
7280 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
7281 struct elf_aarch64_link_hash_table
7282 *htab, bfd *output_bfd,
7283 struct bfd_link_info *info)
7285 bfd_byte *plt_entry;
7288 bfd_vma gotplt_entry_address;
7289 bfd_vma plt_entry_address;
7290 Elf_Internal_Rela rela;
7292 asection *plt, *gotplt, *relplt;
7294 /* When building a static executable, use .iplt, .igot.plt and
7295 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7296 if (htab->root.splt != NULL)
7298 plt = htab->root.splt;
7299 gotplt = htab->root.sgotplt;
7300 relplt = htab->root.srelplt;
7304 plt = htab->root.iplt;
7305 gotplt = htab->root.igotplt;
7306 relplt = htab->root.irelplt;
7309 /* Get the index in the procedure linkage table which
7310 corresponds to this symbol. This is the index of this symbol
7311 in all the symbols for which we are making plt entries. The
7312 first entry in the procedure linkage table is reserved.
7314 Get the offset into the .got table of the entry that
7315 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
7316 bytes. The first three are reserved for the dynamic linker.
7318 For static executables, we don't reserve anything. */
7320 if (plt == htab->root.splt)
7322 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
7323 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
7327 plt_index = h->plt.offset / htab->plt_entry_size;
7328 got_offset = plt_index * GOT_ENTRY_SIZE;
7331 plt_entry = plt->contents + h->plt.offset;
7332 plt_entry_address = plt->output_section->vma
7333 + plt->output_offset + h->plt.offset;
7334 gotplt_entry_address = gotplt->output_section->vma +
7335 gotplt->output_offset + got_offset;
7337 /* Copy in the boiler-plate for the PLTn entry. */
7338 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
7340 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7341 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7342 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7344 PG (gotplt_entry_address) -
7345 PG (plt_entry_address));
7347 /* Fill in the lo12 bits for the load from the pltgot. */
7348 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
7350 PG_OFFSET (gotplt_entry_address));
7352 /* Fill in the lo12 bits for the add from the pltgot entry. */
7353 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
7355 PG_OFFSET (gotplt_entry_address));
7357 /* All the GOTPLT Entries are essentially initialized to PLT0. */
7358 bfd_put_NN (output_bfd,
7359 plt->output_section->vma + plt->output_offset,
7360 gotplt->contents + got_offset);
7362 rela.r_offset = gotplt_entry_address;
7364 if (h->dynindx == -1
7365 || ((info->executable
7366 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7368 && h->type == STT_GNU_IFUNC))
7370 /* If an STT_GNU_IFUNC symbol is locally defined, generate
7371 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
7372 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
7373 rela.r_addend = (h->root.u.def.value
7374 + h->root.u.def.section->output_section->vma
7375 + h->root.u.def.section->output_offset);
7379 /* Fill in the entry in the .rela.plt section. */
7380 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
7384 /* Compute the relocation entry to used based on PLT index and do
7385 not adjust reloc_count. The reloc_count has already been adjusted
7386 to account for this entry. */
7387 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
7388 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7391 /* Size sections even though they're not dynamic. We use it to setup
7392 _TLS_MODULE_BASE_, if needed. */
7395 elfNN_aarch64_always_size_sections (bfd *output_bfd,
7396 struct bfd_link_info *info)
7400 if (info->relocatable)
7403 tls_sec = elf_hash_table (info)->tls_sec;
7407 struct elf_link_hash_entry *tlsbase;
7409 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
7410 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
7414 struct bfd_link_hash_entry *h = NULL;
7415 const struct elf_backend_data *bed =
7416 get_elf_backend_data (output_bfd);
7418 if (!(_bfd_generic_link_add_one_symbol
7419 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
7420 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
7423 tlsbase->type = STT_TLS;
7424 tlsbase = (struct elf_link_hash_entry *) h;
7425 tlsbase->def_regular = 1;
7426 tlsbase->other = STV_HIDDEN;
7427 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
7434 /* Finish up dynamic symbol handling. We set the contents of various
7435 dynamic sections here. */
7437 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
7438 struct bfd_link_info *info,
7439 struct elf_link_hash_entry *h,
7440 Elf_Internal_Sym *sym)
7442 struct elf_aarch64_link_hash_table *htab;
7443 htab = elf_aarch64_hash_table (info);
7445 if (h->plt.offset != (bfd_vma) - 1)
7447 asection *plt, *gotplt, *relplt;
7449 /* This symbol has an entry in the procedure linkage table. Set
7452 /* When building a static executable, use .iplt, .igot.plt and
7453 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7454 if (htab->root.splt != NULL)
7456 plt = htab->root.splt;
7457 gotplt = htab->root.sgotplt;
7458 relplt = htab->root.srelplt;
7462 plt = htab->root.iplt;
7463 gotplt = htab->root.igotplt;
7464 relplt = htab->root.irelplt;
7467 /* This symbol has an entry in the procedure linkage table. Set
7469 if ((h->dynindx == -1
7470 && !((h->forced_local || info->executable)
7472 && h->type == STT_GNU_IFUNC))
7478 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
7479 if (!h->def_regular)
7481 /* Mark the symbol as undefined, rather than as defined in
7482 the .plt section. */
7483 sym->st_shndx = SHN_UNDEF;
7484 /* If the symbol is weak we need to clear the value.
7485 Otherwise, the PLT entry would provide a definition for
7486 the symbol even if the symbol wasn't defined anywhere,
7487 and so the symbol would never be NULL. Leave the value if
7488 there were any relocations where pointer equality matters
7489 (this is a clue for the dynamic linker, to make function
7490 pointer comparisons work between an application and shared
7492 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
7497 if (h->got.offset != (bfd_vma) - 1
7498 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
7500 Elf_Internal_Rela rela;
7503 /* This symbol has an entry in the global offset table. Set it
7505 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
7508 rela.r_offset = (htab->root.sgot->output_section->vma
7509 + htab->root.sgot->output_offset
7510 + (h->got.offset & ~(bfd_vma) 1));
7513 && h->type == STT_GNU_IFUNC)
7517 /* Generate R_AARCH64_GLOB_DAT. */
7524 if (!h->pointer_equality_needed)
7527 /* For non-shared object, we can't use .got.plt, which
7528 contains the real function address if we need pointer
7529 equality. We load the GOT entry with the PLT entry. */
7530 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
7531 bfd_put_NN (output_bfd, (plt->output_section->vma
7532 + plt->output_offset
7534 htab->root.sgot->contents
7535 + (h->got.offset & ~(bfd_vma) 1));
7539 else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
7541 if (!h->def_regular)
7544 BFD_ASSERT ((h->got.offset & 1) != 0);
7545 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
7546 rela.r_addend = (h->root.u.def.value
7547 + h->root.u.def.section->output_section->vma
7548 + h->root.u.def.section->output_offset);
7553 BFD_ASSERT ((h->got.offset & 1) == 0);
7554 bfd_put_NN (output_bfd, (bfd_vma) 0,
7555 htab->root.sgot->contents + h->got.offset);
7556 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
7560 loc = htab->root.srelgot->contents;
7561 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
7562 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7567 Elf_Internal_Rela rela;
7570 /* This symbol needs a copy reloc. Set it up. */
7572 if (h->dynindx == -1
7573 || (h->root.type != bfd_link_hash_defined
7574 && h->root.type != bfd_link_hash_defweak)
7575 || htab->srelbss == NULL)
7578 rela.r_offset = (h->root.u.def.value
7579 + h->root.u.def.section->output_section->vma
7580 + h->root.u.def.section->output_offset);
7581 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
7583 loc = htab->srelbss->contents;
7584 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
7585 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7588 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
7589 be NULL for local symbols. */
7591 && (h == elf_hash_table (info)->hdynamic
7592 || h == elf_hash_table (info)->hgot))
7593 sym->st_shndx = SHN_ABS;
7598 /* Finish up local dynamic symbol handling. We set the contents of
7599 various dynamic sections here. */
7602 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
7604 struct elf_link_hash_entry *h
7605 = (struct elf_link_hash_entry *) *slot;
7606 struct bfd_link_info *info
7607 = (struct bfd_link_info *) inf;
7609 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
7614 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
7615 struct elf_aarch64_link_hash_table
7618 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
7619 small and large plts and at the minute just generates
7622 /* PLT0 of the small PLT looks like this in ELF64 -
7623 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
7624 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
7625 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
7627 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
7628 // GOTPLT entry for this.
7630 PLT0 will be slightly different in ELF32 due to different got entry
7633 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
7637 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
7639 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
7642 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
7643 + htab->root.sgotplt->output_offset
7644 + GOT_ENTRY_SIZE * 2);
7646 plt_base = htab->root.splt->output_section->vma +
7647 htab->root.splt->output_offset;
7649 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7650 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7651 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7652 htab->root.splt->contents + 4,
7653 PG (plt_got_2nd_ent) - PG (plt_base + 4));
7655 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
7656 htab->root.splt->contents + 8,
7657 PG_OFFSET (plt_got_2nd_ent));
7659 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
7660 htab->root.splt->contents + 12,
7661 PG_OFFSET (plt_got_2nd_ent));
7665 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
7666 struct bfd_link_info *info)
7668 struct elf_aarch64_link_hash_table *htab;
7672 htab = elf_aarch64_hash_table (info);
7673 dynobj = htab->root.dynobj;
7674 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
7676 if (htab->root.dynamic_sections_created)
7678 ElfNN_External_Dyn *dyncon, *dynconend;
7680 if (sdyn == NULL || htab->root.sgot == NULL)
7683 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
7684 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
7685 for (; dyncon < dynconend; dyncon++)
7687 Elf_Internal_Dyn dyn;
7690 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
7698 s = htab->root.sgotplt;
7699 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7703 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
7707 s = htab->root.srelplt;
7708 dyn.d_un.d_val = s->size;
7712 /* The procedure linkage table relocs (DT_JMPREL) should
7713 not be included in the overall relocs (DT_RELA).
7714 Therefore, we override the DT_RELASZ entry here to
7715 make it not include the JMPREL relocs. Since the
7716 linker script arranges for .rela.plt to follow all
7717 other relocation sections, we don't have to worry
7718 about changing the DT_RELA entry. */
7719 if (htab->root.srelplt != NULL)
7721 s = htab->root.srelplt;
7722 dyn.d_un.d_val -= s->size;
7726 case DT_TLSDESC_PLT:
7727 s = htab->root.splt;
7728 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7729 + htab->tlsdesc_plt;
7732 case DT_TLSDESC_GOT:
7733 s = htab->root.sgot;
7734 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7735 + htab->dt_tlsdesc_got;
7739 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
7744 /* Fill in the special first entry in the procedure linkage table. */
7745 if (htab->root.splt && htab->root.splt->size > 0)
7747 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
7749 elf_section_data (htab->root.splt->output_section)->
7750 this_hdr.sh_entsize = htab->plt_entry_size;
7753 if (htab->tlsdesc_plt)
7755 bfd_put_NN (output_bfd, (bfd_vma) 0,
7756 htab->root.sgot->contents + htab->dt_tlsdesc_got);
7758 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
7759 elfNN_aarch64_tlsdesc_small_plt_entry,
7760 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
7763 bfd_vma adrp1_addr =
7764 htab->root.splt->output_section->vma
7765 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
7767 bfd_vma adrp2_addr = adrp1_addr + 4;
7770 htab->root.sgot->output_section->vma
7771 + htab->root.sgot->output_offset;
7773 bfd_vma pltgot_addr =
7774 htab->root.sgotplt->output_section->vma
7775 + htab->root.sgotplt->output_offset;
7777 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
7779 bfd_byte *plt_entry =
7780 htab->root.splt->contents + htab->tlsdesc_plt;
7782 /* adrp x2, DT_TLSDESC_GOT */
7783 elf_aarch64_update_plt_entry (output_bfd,
7784 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7786 (PG (dt_tlsdesc_got)
7787 - PG (adrp1_addr)));
7790 elf_aarch64_update_plt_entry (output_bfd,
7791 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7794 - PG (adrp2_addr)));
7796 /* ldr x2, [x2, #0] */
7797 elf_aarch64_update_plt_entry (output_bfd,
7798 BFD_RELOC_AARCH64_LDSTNN_LO12,
7800 PG_OFFSET (dt_tlsdesc_got));
7803 elf_aarch64_update_plt_entry (output_bfd,
7804 BFD_RELOC_AARCH64_ADD_LO12,
7806 PG_OFFSET (pltgot_addr));
7811 if (htab->root.sgotplt)
7813 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
7815 (*_bfd_error_handler)
7816 (_("discarded output section: `%A'"), htab->root.sgotplt);
7820 /* Fill in the first three entries in the global offset table. */
7821 if (htab->root.sgotplt->size > 0)
7823 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
7825 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
7826 bfd_put_NN (output_bfd,
7828 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
7829 bfd_put_NN (output_bfd,
7831 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
7834 if (htab->root.sgot)
7836 if (htab->root.sgot->size > 0)
7839 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
7840 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
7844 elf_section_data (htab->root.sgotplt->output_section)->
7845 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
7848 if (htab->root.sgot && htab->root.sgot->size > 0)
7849 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
7852 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
7853 htab_traverse (htab->loc_hash_table,
7854 elfNN_aarch64_finish_local_dynamic_symbol,
7860 /* Return address for Ith PLT stub in section PLT, for relocation REL
7861 or (bfd_vma) -1 if it should not be included. */
7864 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
7865 const arelent *rel ATTRIBUTE_UNUSED)
7867 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
7871 /* We use this so we can override certain functions
7872 (though currently we don't). */
7874 const struct elf_size_info elfNN_aarch64_size_info =
7876 sizeof (ElfNN_External_Ehdr),
7877 sizeof (ElfNN_External_Phdr),
7878 sizeof (ElfNN_External_Shdr),
7879 sizeof (ElfNN_External_Rel),
7880 sizeof (ElfNN_External_Rela),
7881 sizeof (ElfNN_External_Sym),
7882 sizeof (ElfNN_External_Dyn),
7883 sizeof (Elf_External_Note),
7884 4, /* Hash table entry size. */
7885 1, /* Internal relocs per external relocs. */
7886 ARCH_SIZE, /* Arch size. */
7887 LOG_FILE_ALIGN, /* Log_file_align. */
7888 ELFCLASSNN, EV_CURRENT,
7889 bfd_elfNN_write_out_phdrs,
7890 bfd_elfNN_write_shdrs_and_ehdr,
7891 bfd_elfNN_checksum_contents,
7892 bfd_elfNN_write_relocs,
7893 bfd_elfNN_swap_symbol_in,
7894 bfd_elfNN_swap_symbol_out,
7895 bfd_elfNN_slurp_reloc_table,
7896 bfd_elfNN_slurp_symbol_table,
7897 bfd_elfNN_swap_dyn_in,
7898 bfd_elfNN_swap_dyn_out,
7899 bfd_elfNN_swap_reloc_in,
7900 bfd_elfNN_swap_reloc_out,
7901 bfd_elfNN_swap_reloca_in,
7902 bfd_elfNN_swap_reloca_out
7905 #define ELF_ARCH bfd_arch_aarch64
7906 #define ELF_MACHINE_CODE EM_AARCH64
7907 #define ELF_MAXPAGESIZE 0x10000
7908 #define ELF_MINPAGESIZE 0x1000
7909 #define ELF_COMMONPAGESIZE 0x1000
7911 #define bfd_elfNN_close_and_cleanup \
7912 elfNN_aarch64_close_and_cleanup
7914 #define bfd_elfNN_bfd_free_cached_info \
7915 elfNN_aarch64_bfd_free_cached_info
7917 #define bfd_elfNN_bfd_is_target_special_symbol \
7918 elfNN_aarch64_is_target_special_symbol
7920 #define bfd_elfNN_bfd_link_hash_table_create \
7921 elfNN_aarch64_link_hash_table_create
7923 #define bfd_elfNN_bfd_merge_private_bfd_data \
7924 elfNN_aarch64_merge_private_bfd_data
7926 #define bfd_elfNN_bfd_print_private_bfd_data \
7927 elfNN_aarch64_print_private_bfd_data
7929 #define bfd_elfNN_bfd_reloc_type_lookup \
7930 elfNN_aarch64_reloc_type_lookup
7932 #define bfd_elfNN_bfd_reloc_name_lookup \
7933 elfNN_aarch64_reloc_name_lookup
7935 #define bfd_elfNN_bfd_set_private_flags \
7936 elfNN_aarch64_set_private_flags
7938 #define bfd_elfNN_find_inliner_info \
7939 elfNN_aarch64_find_inliner_info
7941 #define bfd_elfNN_find_nearest_line \
7942 elfNN_aarch64_find_nearest_line
7944 #define bfd_elfNN_mkobject \
7945 elfNN_aarch64_mkobject
7947 #define bfd_elfNN_new_section_hook \
7948 elfNN_aarch64_new_section_hook
7950 #define elf_backend_adjust_dynamic_symbol \
7951 elfNN_aarch64_adjust_dynamic_symbol
7953 #define elf_backend_always_size_sections \
7954 elfNN_aarch64_always_size_sections
7956 #define elf_backend_check_relocs \
7957 elfNN_aarch64_check_relocs
7959 #define elf_backend_copy_indirect_symbol \
7960 elfNN_aarch64_copy_indirect_symbol
7962 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
7963 to them in our hash. */
7964 #define elf_backend_create_dynamic_sections \
7965 elfNN_aarch64_create_dynamic_sections
7967 #define elf_backend_init_index_section \
7968 _bfd_elf_init_2_index_sections
7970 #define elf_backend_finish_dynamic_sections \
7971 elfNN_aarch64_finish_dynamic_sections
7973 #define elf_backend_finish_dynamic_symbol \
7974 elfNN_aarch64_finish_dynamic_symbol
7976 #define elf_backend_gc_sweep_hook \
7977 elfNN_aarch64_gc_sweep_hook
7979 #define elf_backend_object_p \
7980 elfNN_aarch64_object_p
7982 #define elf_backend_output_arch_local_syms \
7983 elfNN_aarch64_output_arch_local_syms
7985 #define elf_backend_plt_sym_val \
7986 elfNN_aarch64_plt_sym_val
7988 #define elf_backend_post_process_headers \
7989 elfNN_aarch64_post_process_headers
7991 #define elf_backend_relocate_section \
7992 elfNN_aarch64_relocate_section
7994 #define elf_backend_reloc_type_class \
7995 elfNN_aarch64_reloc_type_class
7997 #define elf_backend_section_from_shdr \
7998 elfNN_aarch64_section_from_shdr
8000 #define elf_backend_size_dynamic_sections \
8001 elfNN_aarch64_size_dynamic_sections
8003 #define elf_backend_size_info \
8004 elfNN_aarch64_size_info
8006 #define elf_backend_write_section \
8007 elfNN_aarch64_write_section
8009 #define elf_backend_can_refcount 1
8010 #define elf_backend_can_gc_sections 1
8011 #define elf_backend_plt_readonly 1
8012 #define elf_backend_want_got_plt 1
8013 #define elf_backend_want_plt_sym 0
8014 #define elf_backend_may_use_rel_p 0
8015 #define elf_backend_may_use_rela_p 1
8016 #define elf_backend_default_use_rela_p 1
8017 #define elf_backend_rela_normal 1
8018 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
8019 #define elf_backend_default_execstack 0
8021 #undef elf_backend_obj_attrs_section
8022 #define elf_backend_obj_attrs_section ".ARM.attributes"
8024 #include "elfNN-target.h"