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 /* A fix-descriptor for erratum 835769. */
1717 struct aarch64_erratum_835769_fix
1722 uint32_t veneered_insn
;
1724 enum elf_aarch64_stub_type stub_type
;
1727 /* The size of the thread control block which is defined to be two pointers. */
1728 #define TCB_SIZE (ARCH_SIZE/8)*2
1730 struct elf_aarch64_local_symbol
1732 unsigned int got_type
;
1733 bfd_signed_vma got_refcount
;
1736 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1737 offset is from the end of the jump table and reserved entries
1740 The magic value (bfd_vma) -1 indicates that an offset has not be
1742 bfd_vma tlsdesc_got_jump_table_offset
;
1745 struct elf_aarch64_obj_tdata
1747 struct elf_obj_tdata root
;
1749 /* local symbol descriptors */
1750 struct elf_aarch64_local_symbol
*locals
;
1752 /* Zero to warn when linking objects with incompatible enum sizes. */
1753 int no_enum_size_warning
;
1755 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1756 int no_wchar_size_warning
;
1759 #define elf_aarch64_tdata(bfd) \
1760 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1762 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1764 #define is_aarch64_elf(bfd) \
1765 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1766 && elf_tdata (bfd) != NULL \
1767 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1770 elfNN_aarch64_mkobject (bfd
*abfd
)
1772 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_aarch64_obj_tdata
),
1776 #define elf_aarch64_hash_entry(ent) \
1777 ((struct elf_aarch64_link_hash_entry *)(ent))
1779 #define GOT_UNKNOWN 0
1780 #define GOT_NORMAL 1
1781 #define GOT_TLS_GD 2
1782 #define GOT_TLS_IE 4
1783 #define GOT_TLSDESC_GD 8
1785 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1787 /* AArch64 ELF linker hash entry. */
1788 struct elf_aarch64_link_hash_entry
1790 struct elf_link_hash_entry root
;
1792 /* Track dynamic relocs copied for this symbol. */
1793 struct elf_dyn_relocs
*dyn_relocs
;
1795 /* Since PLT entries have variable size, we need to record the
1796 index into .got.plt instead of recomputing it from the PLT
1798 bfd_signed_vma plt_got_offset
;
1800 /* Bit mask representing the type of GOT entry(s) if any required by
1802 unsigned int got_type
;
1804 /* A pointer to the most recently used stub hash entry against this
1806 struct elf_aarch64_stub_hash_entry
*stub_cache
;
1808 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1809 is from the end of the jump table and reserved entries within the PLTGOT.
1811 The magic value (bfd_vma) -1 indicates that an offset has not
1813 bfd_vma tlsdesc_got_jump_table_offset
;
1817 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry
*h
,
1819 unsigned long r_symndx
)
1822 return elf_aarch64_hash_entry (h
)->got_type
;
1824 if (! elf_aarch64_locals (abfd
))
1827 return elf_aarch64_locals (abfd
)[r_symndx
].got_type
;
1830 /* Get the AArch64 elf linker hash table from a link_info structure. */
1831 #define elf_aarch64_hash_table(info) \
1832 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1834 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1835 ((struct elf_aarch64_stub_hash_entry *) \
1836 bfd_hash_lookup ((table), (string), (create), (copy)))
1838 /* AArch64 ELF linker hash table. */
1839 struct elf_aarch64_link_hash_table
1841 /* The main hash table. */
1842 struct elf_link_hash_table root
;
1844 /* Nonzero to force PIC branch veneers. */
1847 /* Fix erratum 835769. */
1848 int fix_erratum_835769
;
1850 /* A table of fix locations for erratum 835769. This holds erratum
1851 fix locations between elfNN_aarch64_size_stubs() and
1852 elfNN_aarch64_write_section(). */
1853 struct aarch64_erratum_835769_fix
*aarch64_erratum_835769_fixes
;
1854 unsigned int num_aarch64_erratum_835769_fixes
;
1856 /* The number of bytes in the initial entry in the PLT. */
1857 bfd_size_type plt_header_size
;
1859 /* The number of bytes in the subsequent PLT etries. */
1860 bfd_size_type plt_entry_size
;
1862 /* Short-cuts to get to dynamic linker sections. */
1866 /* Small local sym cache. */
1867 struct sym_cache sym_cache
;
1869 /* For convenience in allocate_dynrelocs. */
1872 /* The amount of space used by the reserved portion of the sgotplt
1873 section, plus whatever space is used by the jump slots. */
1874 bfd_vma sgotplt_jump_table_size
;
1876 /* The stub hash table. */
1877 struct bfd_hash_table stub_hash_table
;
1879 /* Linker stub bfd. */
1882 /* Linker call-backs. */
1883 asection
*(*add_stub_section
) (const char *, asection
*);
1884 void (*layout_sections_again
) (void);
1886 /* Array to keep track of which stub sections have been created, and
1887 information on stub grouping. */
1890 /* This is the section to which stubs in the group will be
1893 /* The stub section. */
1897 /* Assorted information used by elfNN_aarch64_size_stubs. */
1898 unsigned int bfd_count
;
1900 asection
**input_list
;
1902 /* The offset into splt of the PLT entry for the TLS descriptor
1903 resolver. Special values are 0, if not necessary (or not found
1904 to be necessary yet), and -1 if needed but not determined
1906 bfd_vma tlsdesc_plt
;
1908 /* The GOT offset for the lazy trampoline. Communicated to the
1909 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
1910 indicates an offset is not allocated. */
1911 bfd_vma dt_tlsdesc_got
;
1913 /* Used by local STT_GNU_IFUNC symbols. */
1914 htab_t loc_hash_table
;
1915 void * loc_hash_memory
;
1918 /* Create an entry in an AArch64 ELF linker hash table. */
1920 static struct bfd_hash_entry
*
1921 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1922 struct bfd_hash_table
*table
,
1925 struct elf_aarch64_link_hash_entry
*ret
=
1926 (struct elf_aarch64_link_hash_entry
*) entry
;
1928 /* Allocate the structure if it has not already been allocated by a
1931 ret
= bfd_hash_allocate (table
,
1932 sizeof (struct elf_aarch64_link_hash_entry
));
1934 return (struct bfd_hash_entry
*) ret
;
1936 /* Call the allocation method of the superclass. */
1937 ret
= ((struct elf_aarch64_link_hash_entry
*)
1938 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
1942 ret
->dyn_relocs
= NULL
;
1943 ret
->got_type
= GOT_UNKNOWN
;
1944 ret
->plt_got_offset
= (bfd_vma
) - 1;
1945 ret
->stub_cache
= NULL
;
1946 ret
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
1949 return (struct bfd_hash_entry
*) ret
;
1952 /* Initialize an entry in the stub hash table. */
1954 static struct bfd_hash_entry
*
1955 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
1956 struct bfd_hash_table
*table
, const char *string
)
1958 /* Allocate the structure if it has not already been allocated by a
1962 entry
= bfd_hash_allocate (table
,
1964 elf_aarch64_stub_hash_entry
));
1969 /* Call the allocation method of the superclass. */
1970 entry
= bfd_hash_newfunc (entry
, table
, string
);
1973 struct elf_aarch64_stub_hash_entry
*eh
;
1975 /* Initialize the local fields. */
1976 eh
= (struct elf_aarch64_stub_hash_entry
*) entry
;
1977 eh
->stub_sec
= NULL
;
1978 eh
->stub_offset
= 0;
1979 eh
->target_value
= 0;
1980 eh
->target_section
= NULL
;
1981 eh
->stub_type
= aarch64_stub_none
;
1989 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1990 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1991 as global symbol. We reuse indx and dynstr_index for local symbol
1992 hash since they aren't used by global symbols in this backend. */
1995 elfNN_aarch64_local_htab_hash (const void *ptr
)
1997 struct elf_link_hash_entry
*h
1998 = (struct elf_link_hash_entry
*) ptr
;
1999 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
2002 /* Compare local hash entries. */
2005 elfNN_aarch64_local_htab_eq (const void *ptr1
, const void *ptr2
)
2007 struct elf_link_hash_entry
*h1
2008 = (struct elf_link_hash_entry
*) ptr1
;
2009 struct elf_link_hash_entry
*h2
2010 = (struct elf_link_hash_entry
*) ptr2
;
2012 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
2015 /* Find and/or create a hash entry for local symbol. */
2017 static struct elf_link_hash_entry
*
2018 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table
*htab
,
2019 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
2022 struct elf_aarch64_link_hash_entry e
, *ret
;
2023 asection
*sec
= abfd
->sections
;
2024 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
2025 ELFNN_R_SYM (rel
->r_info
));
2028 e
.root
.indx
= sec
->id
;
2029 e
.root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2030 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
2031 create
? INSERT
: NO_INSERT
);
2038 ret
= (struct elf_aarch64_link_hash_entry
*) *slot
;
2042 ret
= (struct elf_aarch64_link_hash_entry
*)
2043 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
2044 sizeof (struct elf_aarch64_link_hash_entry
));
2047 memset (ret
, 0, sizeof (*ret
));
2048 ret
->root
.indx
= sec
->id
;
2049 ret
->root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2050 ret
->root
.dynindx
= -1;
2056 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2059 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info
*info
,
2060 struct elf_link_hash_entry
*dir
,
2061 struct elf_link_hash_entry
*ind
)
2063 struct elf_aarch64_link_hash_entry
*edir
, *eind
;
2065 edir
= (struct elf_aarch64_link_hash_entry
*) dir
;
2066 eind
= (struct elf_aarch64_link_hash_entry
*) ind
;
2068 if (eind
->dyn_relocs
!= NULL
)
2070 if (edir
->dyn_relocs
!= NULL
)
2072 struct elf_dyn_relocs
**pp
;
2073 struct elf_dyn_relocs
*p
;
2075 /* Add reloc counts against the indirect sym to the direct sym
2076 list. Merge any entries against the same section. */
2077 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
;)
2079 struct elf_dyn_relocs
*q
;
2081 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2082 if (q
->sec
== p
->sec
)
2084 q
->pc_count
+= p
->pc_count
;
2085 q
->count
+= p
->count
;
2092 *pp
= edir
->dyn_relocs
;
2095 edir
->dyn_relocs
= eind
->dyn_relocs
;
2096 eind
->dyn_relocs
= NULL
;
2099 if (ind
->root
.type
== bfd_link_hash_indirect
)
2101 /* Copy over PLT info. */
2102 if (dir
->got
.refcount
<= 0)
2104 edir
->got_type
= eind
->got_type
;
2105 eind
->got_type
= GOT_UNKNOWN
;
2109 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2112 /* Destroy an AArch64 elf linker hash table. */
2115 elfNN_aarch64_link_hash_table_free (bfd
*obfd
)
2117 struct elf_aarch64_link_hash_table
*ret
2118 = (struct elf_aarch64_link_hash_table
*) obfd
->link
.hash
;
2120 if (ret
->loc_hash_table
)
2121 htab_delete (ret
->loc_hash_table
);
2122 if (ret
->loc_hash_memory
)
2123 objalloc_free ((struct objalloc
*) ret
->loc_hash_memory
);
2125 bfd_hash_table_free (&ret
->stub_hash_table
);
2126 _bfd_elf_link_hash_table_free (obfd
);
2129 /* Create an AArch64 elf linker hash table. */
2131 static struct bfd_link_hash_table
*
2132 elfNN_aarch64_link_hash_table_create (bfd
*abfd
)
2134 struct elf_aarch64_link_hash_table
*ret
;
2135 bfd_size_type amt
= sizeof (struct elf_aarch64_link_hash_table
);
2137 ret
= bfd_zmalloc (amt
);
2141 if (!_bfd_elf_link_hash_table_init
2142 (&ret
->root
, abfd
, elfNN_aarch64_link_hash_newfunc
,
2143 sizeof (struct elf_aarch64_link_hash_entry
), AARCH64_ELF_DATA
))
2149 ret
->plt_header_size
= PLT_ENTRY_SIZE
;
2150 ret
->plt_entry_size
= PLT_SMALL_ENTRY_SIZE
;
2152 ret
->dt_tlsdesc_got
= (bfd_vma
) - 1;
2154 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2155 sizeof (struct elf_aarch64_stub_hash_entry
)))
2157 _bfd_elf_link_hash_table_free (abfd
);
2161 ret
->loc_hash_table
= htab_try_create (1024,
2162 elfNN_aarch64_local_htab_hash
,
2163 elfNN_aarch64_local_htab_eq
,
2165 ret
->loc_hash_memory
= objalloc_create ();
2166 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
2168 elfNN_aarch64_link_hash_table_free (abfd
);
2171 ret
->root
.root
.hash_table_free
= elfNN_aarch64_link_hash_table_free
;
2173 return &ret
->root
.root
;
2177 aarch64_relocate (unsigned int r_type
, bfd
*input_bfd
, asection
*input_section
,
2178 bfd_vma offset
, bfd_vma value
)
2180 reloc_howto_type
*howto
;
2183 howto
= elfNN_aarch64_howto_from_type (r_type
);
2184 place
= (input_section
->output_section
->vma
+ input_section
->output_offset
2187 r_type
= elfNN_aarch64_bfd_reloc_from_type (r_type
);
2188 value
= _bfd_aarch64_elf_resolve_relocation (r_type
, place
, value
, 0, FALSE
);
2189 return _bfd_aarch64_elf_put_addend (input_bfd
,
2190 input_section
->contents
+ offset
, r_type
,
2194 static enum elf_aarch64_stub_type
2195 aarch64_select_branch_stub (bfd_vma value
, bfd_vma place
)
2197 if (aarch64_valid_for_adrp_p (value
, place
))
2198 return aarch64_stub_adrp_branch
;
2199 return aarch64_stub_long_branch
;
2202 /* Determine the type of stub needed, if any, for a call. */
2204 static enum elf_aarch64_stub_type
2205 aarch64_type_of_stub (struct bfd_link_info
*info
,
2206 asection
*input_sec
,
2207 const Elf_Internal_Rela
*rel
,
2208 unsigned char st_type
,
2209 struct elf_aarch64_link_hash_entry
*hash
,
2210 bfd_vma destination
)
2213 bfd_signed_vma branch_offset
;
2214 unsigned int r_type
;
2215 struct elf_aarch64_link_hash_table
*globals
;
2216 enum elf_aarch64_stub_type stub_type
= aarch64_stub_none
;
2217 bfd_boolean via_plt_p
;
2219 if (st_type
!= STT_FUNC
)
2222 globals
= elf_aarch64_hash_table (info
);
2223 via_plt_p
= (globals
->root
.splt
!= NULL
&& hash
!= NULL
2224 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1);
2229 /* Determine where the call point is. */
2230 location
= (input_sec
->output_offset
2231 + input_sec
->output_section
->vma
+ rel
->r_offset
);
2233 branch_offset
= (bfd_signed_vma
) (destination
- location
);
2235 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2237 /* We don't want to redirect any old unconditional jump in this way,
2238 only one which is being used for a sibcall, where it is
2239 acceptable for the IP0 and IP1 registers to be clobbered. */
2240 if ((r_type
== AARCH64_R (CALL26
) || r_type
== AARCH64_R (JUMP26
))
2241 && (branch_offset
> AARCH64_MAX_FWD_BRANCH_OFFSET
2242 || branch_offset
< AARCH64_MAX_BWD_BRANCH_OFFSET
))
2244 stub_type
= aarch64_stub_long_branch
;
2250 /* Build a name for an entry in the stub hash table. */
2253 elfNN_aarch64_stub_name (const asection
*input_section
,
2254 const asection
*sym_sec
,
2255 const struct elf_aarch64_link_hash_entry
*hash
,
2256 const Elf_Internal_Rela
*rel
)
2263 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 16 + 1;
2264 stub_name
= bfd_malloc (len
);
2265 if (stub_name
!= NULL
)
2266 snprintf (stub_name
, len
, "%08x_%s+%" BFD_VMA_FMT
"x",
2267 (unsigned int) input_section
->id
,
2268 hash
->root
.root
.root
.string
,
2273 len
= 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2274 stub_name
= bfd_malloc (len
);
2275 if (stub_name
!= NULL
)
2276 snprintf (stub_name
, len
, "%08x_%x:%x+%" BFD_VMA_FMT
"x",
2277 (unsigned int) input_section
->id
,
2278 (unsigned int) sym_sec
->id
,
2279 (unsigned int) ELFNN_R_SYM (rel
->r_info
),
2286 /* Look up an entry in the stub hash. Stub entries are cached because
2287 creating the stub name takes a bit of time. */
2289 static struct elf_aarch64_stub_hash_entry
*
2290 elfNN_aarch64_get_stub_entry (const asection
*input_section
,
2291 const asection
*sym_sec
,
2292 struct elf_link_hash_entry
*hash
,
2293 const Elf_Internal_Rela
*rel
,
2294 struct elf_aarch64_link_hash_table
*htab
)
2296 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2297 struct elf_aarch64_link_hash_entry
*h
=
2298 (struct elf_aarch64_link_hash_entry
*) hash
;
2299 const asection
*id_sec
;
2301 if ((input_section
->flags
& SEC_CODE
) == 0)
2304 /* If this input section is part of a group of sections sharing one
2305 stub section, then use the id of the first section in the group.
2306 Stub names need to include a section id, as there may well be
2307 more than one stub used to reach say, printf, and we need to
2308 distinguish between them. */
2309 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
2311 if (h
!= NULL
&& h
->stub_cache
!= NULL
2312 && h
->stub_cache
->h
== h
&& h
->stub_cache
->id_sec
== id_sec
)
2314 stub_entry
= h
->stub_cache
;
2320 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, h
, rel
);
2321 if (stub_name
== NULL
)
2324 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
2325 stub_name
, FALSE
, FALSE
);
2327 h
->stub_cache
= stub_entry
;
2335 /* Add a new stub entry to the stub hash. Not all fields of the new
2336 stub entry are initialised. */
2338 static struct elf_aarch64_stub_hash_entry
*
2339 elfNN_aarch64_add_stub (const char *stub_name
,
2341 struct elf_aarch64_link_hash_table
*htab
)
2345 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2347 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2348 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
2349 if (stub_sec
== NULL
)
2351 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
2352 if (stub_sec
== NULL
)
2358 namelen
= strlen (link_sec
->name
);
2359 len
= namelen
+ sizeof (STUB_SUFFIX
);
2360 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
2364 memcpy (s_name
, link_sec
->name
, namelen
);
2365 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
2366 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
2367 if (stub_sec
== NULL
)
2369 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
2371 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
2374 /* Enter this entry into the linker stub hash table. */
2375 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2377 if (stub_entry
== NULL
)
2379 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
2380 section
->owner
, stub_name
);
2384 stub_entry
->stub_sec
= stub_sec
;
2385 stub_entry
->stub_offset
= 0;
2386 stub_entry
->id_sec
= link_sec
;
2392 aarch64_build_one_stub (struct bfd_hash_entry
*gen_entry
,
2393 void *in_arg ATTRIBUTE_UNUSED
)
2395 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2400 bfd_vma veneered_insn_loc
;
2401 bfd_vma veneer_entry_loc
;
2402 bfd_signed_vma branch_offset
= 0;
2403 unsigned int template_size
;
2404 const uint32_t *template;
2407 /* Massage our args to the form they really have. */
2408 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
2410 stub_sec
= stub_entry
->stub_sec
;
2412 /* Make a note of the offset within the stubs for this entry. */
2413 stub_entry
->stub_offset
= stub_sec
->size
;
2414 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
2416 stub_bfd
= stub_sec
->owner
;
2418 /* This is the address of the stub destination. */
2419 sym_value
= (stub_entry
->target_value
2420 + stub_entry
->target_section
->output_offset
2421 + stub_entry
->target_section
->output_section
->vma
);
2423 if (stub_entry
->stub_type
== aarch64_stub_long_branch
)
2425 bfd_vma place
= (stub_entry
->stub_offset
+ stub_sec
->output_section
->vma
2426 + stub_sec
->output_offset
);
2428 /* See if we can relax the stub. */
2429 if (aarch64_valid_for_adrp_p (sym_value
, place
))
2430 stub_entry
->stub_type
= aarch64_select_branch_stub (sym_value
, place
);
2433 switch (stub_entry
->stub_type
)
2435 case aarch64_stub_adrp_branch
:
2436 template = aarch64_adrp_branch_stub
;
2437 template_size
= sizeof (aarch64_adrp_branch_stub
);
2439 case aarch64_stub_long_branch
:
2440 template = aarch64_long_branch_stub
;
2441 template_size
= sizeof (aarch64_long_branch_stub
);
2443 case aarch64_stub_erratum_835769_veneer
:
2444 template = aarch64_erratum_835769_stub
;
2445 template_size
= sizeof (aarch64_erratum_835769_stub
);
2452 for (i
= 0; i
< (template_size
/ sizeof template[0]); i
++)
2454 bfd_putl32 (template[i
], loc
);
2458 template_size
= (template_size
+ 7) & ~7;
2459 stub_sec
->size
+= template_size
;
2461 switch (stub_entry
->stub_type
)
2463 case aarch64_stub_adrp_branch
:
2464 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21
), stub_bfd
, stub_sec
,
2465 stub_entry
->stub_offset
, sym_value
))
2466 /* The stub would not have been relaxed if the offset was out
2470 _bfd_final_link_relocate
2471 (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC
)),
2475 stub_entry
->stub_offset
+ 4,
2480 case aarch64_stub_long_branch
:
2481 /* We want the value relative to the address 12 bytes back from the
2483 _bfd_final_link_relocate (elfNN_aarch64_howto_from_type
2484 (AARCH64_R (PRELNN
)), stub_bfd
, stub_sec
,
2486 stub_entry
->stub_offset
+ 16,
2490 case aarch64_stub_erratum_835769_veneer
:
2491 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
2492 + stub_entry
->target_section
->output_offset
2493 + stub_entry
->target_value
;
2494 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
2495 + stub_entry
->stub_sec
->output_offset
2496 + stub_entry
->stub_offset
;
2497 branch_offset
= veneered_insn_loc
- veneer_entry_loc
;
2498 branch_offset
>>= 2;
2499 branch_offset
&= 0x3ffffff;
2500 bfd_putl32 (stub_entry
->veneered_insn
,
2501 stub_sec
->contents
+ stub_entry
->stub_offset
);
2502 bfd_putl32 (template[1] | branch_offset
,
2503 stub_sec
->contents
+ stub_entry
->stub_offset
+ 4);
2513 /* As above, but don't actually build the stub. Just bump offset so
2514 we know stub section sizes. */
2517 aarch64_size_one_stub (struct bfd_hash_entry
*gen_entry
,
2518 void *in_arg ATTRIBUTE_UNUSED
)
2520 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2523 /* Massage our args to the form they really have. */
2524 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
2526 switch (stub_entry
->stub_type
)
2528 case aarch64_stub_adrp_branch
:
2529 size
= sizeof (aarch64_adrp_branch_stub
);
2531 case aarch64_stub_long_branch
:
2532 size
= sizeof (aarch64_long_branch_stub
);
2534 case aarch64_stub_erratum_835769_veneer
:
2535 size
= sizeof (aarch64_erratum_835769_stub
);
2543 size
= (size
+ 7) & ~7;
2544 stub_entry
->stub_sec
->size
+= size
;
2548 /* External entry points for sizing and building linker stubs. */
2550 /* Set up various things so that we can make a list of input sections
2551 for each output section included in the link. Returns -1 on error,
2552 0 when no stubs will be needed, and 1 on success. */
2555 elfNN_aarch64_setup_section_lists (bfd
*output_bfd
,
2556 struct bfd_link_info
*info
)
2559 unsigned int bfd_count
;
2560 int top_id
, top_index
;
2562 asection
**input_list
, **list
;
2564 struct elf_aarch64_link_hash_table
*htab
=
2565 elf_aarch64_hash_table (info
);
2567 if (!is_elf_hash_table (htab
))
2570 /* Count the number of input BFDs and find the top input section id. */
2571 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
2572 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
2575 for (section
= input_bfd
->sections
;
2576 section
!= NULL
; section
= section
->next
)
2578 if (top_id
< section
->id
)
2579 top_id
= section
->id
;
2582 htab
->bfd_count
= bfd_count
;
2584 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
2585 htab
->stub_group
= bfd_zmalloc (amt
);
2586 if (htab
->stub_group
== NULL
)
2589 /* We can't use output_bfd->section_count here to find the top output
2590 section index as some sections may have been removed, and
2591 _bfd_strip_section_from_output doesn't renumber the indices. */
2592 for (section
= output_bfd
->sections
, top_index
= 0;
2593 section
!= NULL
; section
= section
->next
)
2595 if (top_index
< section
->index
)
2596 top_index
= section
->index
;
2599 htab
->top_index
= top_index
;
2600 amt
= sizeof (asection
*) * (top_index
+ 1);
2601 input_list
= bfd_malloc (amt
);
2602 htab
->input_list
= input_list
;
2603 if (input_list
== NULL
)
2606 /* For sections we aren't interested in, mark their entries with a
2607 value we can check later. */
2608 list
= input_list
+ top_index
;
2610 *list
= bfd_abs_section_ptr
;
2611 while (list
-- != input_list
);
2613 for (section
= output_bfd
->sections
;
2614 section
!= NULL
; section
= section
->next
)
2616 if ((section
->flags
& SEC_CODE
) != 0)
2617 input_list
[section
->index
] = NULL
;
2623 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2624 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2626 /* The linker repeatedly calls this function for each input section,
2627 in the order that input sections are linked into output sections.
2628 Build lists of input sections to determine groupings between which
2629 we may insert linker stubs. */
2632 elfNN_aarch64_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
2634 struct elf_aarch64_link_hash_table
*htab
=
2635 elf_aarch64_hash_table (info
);
2637 if (isec
->output_section
->index
<= htab
->top_index
)
2639 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
2641 if (*list
!= bfd_abs_section_ptr
)
2643 /* Steal the link_sec pointer for our list. */
2644 /* This happens to make the list in reverse order,
2645 which is what we want. */
2646 PREV_SEC (isec
) = *list
;
2652 /* See whether we can group stub sections together. Grouping stub
2653 sections may result in fewer stubs. More importantly, we need to
2654 put all .init* and .fini* stubs at the beginning of the .init or
2655 .fini output sections respectively, because glibc splits the
2656 _init and _fini functions into multiple parts. Putting a stub in
2657 the middle of a function is not a good idea. */
2660 group_sections (struct elf_aarch64_link_hash_table
*htab
,
2661 bfd_size_type stub_group_size
,
2662 bfd_boolean stubs_always_before_branch
)
2664 asection
**list
= htab
->input_list
+ htab
->top_index
;
2668 asection
*tail
= *list
;
2670 if (tail
== bfd_abs_section_ptr
)
2673 while (tail
!= NULL
)
2677 bfd_size_type total
;
2681 while ((prev
= PREV_SEC (curr
)) != NULL
2682 && ((total
+= curr
->output_offset
- prev
->output_offset
)
2686 /* OK, the size from the start of CURR to the end is less
2687 than stub_group_size and thus can be handled by one stub
2688 section. (Or the tail section is itself larger than
2689 stub_group_size, in which case we may be toast.)
2690 We should really be keeping track of the total size of
2691 stubs added here, as stubs contribute to the final output
2695 prev
= PREV_SEC (tail
);
2696 /* Set up this stub group. */
2697 htab
->stub_group
[tail
->id
].link_sec
= curr
;
2699 while (tail
!= curr
&& (tail
= prev
) != NULL
);
2701 /* But wait, there's more! Input sections up to stub_group_size
2702 bytes before the stub section can be handled by it too. */
2703 if (!stubs_always_before_branch
)
2707 && ((total
+= tail
->output_offset
- prev
->output_offset
)
2711 prev
= PREV_SEC (tail
);
2712 htab
->stub_group
[tail
->id
].link_sec
= curr
;
2718 while (list
-- != htab
->input_list
);
2720 free (htab
->input_list
);
2725 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
2727 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
2728 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
2729 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
2730 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
2731 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
2732 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
2734 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
2735 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
2736 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
2737 #define AARCH64_ZR 0x1f
2739 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
2740 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
2742 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
2743 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
2744 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
2745 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
2746 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
2747 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
2748 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
2749 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
2750 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
2751 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
2752 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
2753 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
2754 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
2755 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
2756 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
2757 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
2758 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
2759 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
2761 /* Classify an INSN if it is indeed a load/store. Return TRUE if INSN
2762 is a load/store along with the Rt and Rtn. Return FALSE if not a
2766 aarch64_mem_op_p (uint32_t insn
, unsigned int *rt
, unsigned int *rtn
,
2767 bfd_boolean
*pair
, bfd_boolean
*load
)
2775 /* Bail out quickly if INSN doesn't fall into the the load-store
2777 if (!AARCH64_LDST (insn
))
2782 if (AARCH64_LDST_EX (insn
))
2784 *rt
= AARCH64_RT (insn
);
2786 if (AARCH64_BIT (insn
, 21) == 1)
2789 *rtn
= AARCH64_RT2 (insn
);
2791 *load
= AARCH64_LD (insn
);
2794 else if (AARCH64_LDST_NAP (insn
)
2795 || AARCH64_LDSTP_PI (insn
)
2796 || AARCH64_LDSTP_O (insn
)
2797 || AARCH64_LDSTP_PRE (insn
))
2800 *rt
= AARCH64_RT (insn
);
2801 *rtn
= AARCH64_RT2 (insn
);
2802 *load
= AARCH64_LD (insn
);
2805 else if (AARCH64_LDST_PCREL (insn
)
2806 || AARCH64_LDST_UI (insn
)
2807 || AARCH64_LDST_PIIMM (insn
)
2808 || AARCH64_LDST_U (insn
)
2809 || AARCH64_LDST_PREIMM (insn
)
2810 || AARCH64_LDST_RO (insn
)
2811 || AARCH64_LDST_UIMM (insn
))
2813 *rt
= AARCH64_RT (insn
);
2815 if (AARCH64_LDST_PCREL (insn
))
2817 opc
= AARCH64_BITS (insn
, 22, 2);
2818 v
= AARCH64_BIT (insn
, 26);
2819 opc_v
= opc
| (v
<< 2);
2820 *load
= (opc_v
== 1 || opc_v
== 2 || opc_v
== 3
2821 || opc_v
== 5 || opc_v
== 7);
2824 else if (AARCH64_LDST_SIMD_M (insn
)
2825 || AARCH64_LDST_SIMD_M_PI (insn
))
2827 *rt
= AARCH64_RT (insn
);
2828 *load
= AARCH64_BIT (insn
, 22);
2829 opcode
= (insn
>> 12) & 0xf;
2856 else if (AARCH64_LDST_SIMD_S (insn
)
2857 || AARCH64_LDST_SIMD_S_PI (insn
))
2859 *rt
= AARCH64_RT (insn
);
2860 r
= (insn
>> 21) & 1;
2861 *load
= AARCH64_BIT (insn
, 22);
2862 opcode
= (insn
>> 13) & 0x7;
2874 *rtn
= *rt
+ (r
== 0 ? 2 : 3);
2882 *rtn
= *rt
+ (r
== 0 ? 2 : 3);
2894 /* Return TRUE if INSN is multiply-accumulate. */
2897 aarch64_mlxl_p (uint32_t insn
)
2899 uint32_t op31
= AARCH64_OP31 (insn
);
2901 if (AARCH64_MAC (insn
)
2902 && (op31
== 0 || op31
== 1 || op31
== 5)
2903 /* Exclude MUL instructions which are encoded as a multiple accumulate
2905 && AARCH64_RA (insn
) != AARCH64_ZR
)
2911 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
2912 it is possible for a 64-bit multiply-accumulate instruction to generate an
2913 incorrect result. The details are quite complex and hard to
2914 determine statically, since branches in the code may exist in some
2915 circumstances, but all cases end with a memory (load, store, or
2916 prefetch) instruction followed immediately by the multiply-accumulate
2917 operation. We employ a linker patching technique, by moving the potentially
2918 affected multiply-accumulate instruction into a patch region and replacing
2919 the original instruction with a branch to the patch. This function checks
2920 if INSN_1 is the memory operation followed by a multiply-accumulate
2921 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
2922 if INSN_1 and INSN_2 are safe. */
2925 aarch64_erratum_sequence (uint32_t insn_1
, uint32_t insn_2
)
2935 if (aarch64_mlxl_p (insn_2
)
2936 && aarch64_mem_op_p (insn_1
, &rt
, &rtn
, &pair
, &load
))
2938 /* Any SIMD memory op is independent of the subsequent MLA
2939 by definition of the erratum. */
2940 if (AARCH64_BIT (insn_1
, 26))
2943 /* If not SIMD, check for integer memory ops and MLA relationship. */
2944 rn
= AARCH64_RN (insn_2
);
2945 ra
= AARCH64_RA (insn_2
);
2946 rm
= AARCH64_RM (insn_2
);
2948 /* If this is a load and there's a true(RAW) dependency, we are safe
2949 and this is not an erratum sequence. */
2951 (rt
== rn
|| rt
== rm
|| rt
== ra
2952 || (pair
&& (rtn
== rn
|| rtn
== rm
|| rtn
== ra
))))
2955 /* We conservatively put out stubs for all other cases (including
2963 /* Used to order a list of mapping symbols by address. */
2966 elf_aarch64_compare_mapping (const void *a
, const void *b
)
2968 const elf_aarch64_section_map
*amap
= (const elf_aarch64_section_map
*) a
;
2969 const elf_aarch64_section_map
*bmap
= (const elf_aarch64_section_map
*) b
;
2971 if (amap
->vma
> bmap
->vma
)
2973 else if (amap
->vma
< bmap
->vma
)
2975 else if (amap
->type
> bmap
->type
)
2976 /* Ensure results do not depend on the host qsort for objects with
2977 multiple mapping symbols at the same address by sorting on type
2980 else if (amap
->type
< bmap
->type
)
2987 erratum_835769_scan (bfd
*input_bfd
,
2988 struct bfd_link_info
*info
,
2989 struct aarch64_erratum_835769_fix
**fixes_p
,
2990 unsigned int *num_fixes_p
,
2991 unsigned int *fix_table_size_p
)
2994 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
2995 struct aarch64_erratum_835769_fix
*fixes
= *fixes_p
;
2996 unsigned int num_fixes
= *num_fixes_p
;
2997 unsigned int fix_table_size
= *fix_table_size_p
;
3002 for (section
= input_bfd
->sections
;
3004 section
= section
->next
)
3006 bfd_byte
*contents
= NULL
;
3007 struct _aarch64_elf_section_data
*sec_data
;
3010 if (elf_section_type (section
) != SHT_PROGBITS
3011 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3012 || (section
->flags
& SEC_EXCLUDE
) != 0
3013 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3014 || (section
->output_section
== bfd_abs_section_ptr
))
3017 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3018 contents
= elf_section_data (section
)->this_hdr
.contents
;
3019 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3022 sec_data
= elf_aarch64_section_data (section
);
3024 qsort (sec_data
->map
, sec_data
->mapcount
,
3025 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3027 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3029 unsigned int span_start
= sec_data
->map
[span
].vma
;
3030 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3031 ? sec_data
->map
[0].vma
+ section
->size
3032 : sec_data
->map
[span
+ 1].vma
);
3034 char span_type
= sec_data
->map
[span
].type
;
3036 if (span_type
== 'd')
3039 for (i
= span_start
; i
+ 4 < span_end
; i
+= 4)
3041 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3042 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3044 if (aarch64_erratum_sequence (insn_1
, insn_2
))
3046 char *stub_name
= NULL
;
3047 stub_name
= (char *) bfd_malloc
3048 (strlen ("__erratum_835769_veneer_") + 16);
3049 if (stub_name
!= NULL
)
3051 (stub_name
,"__erratum_835769_veneer_%d", num_fixes
);
3055 if (num_fixes
== fix_table_size
)
3057 fix_table_size
*= 2;
3059 (struct aarch64_erratum_835769_fix
*)
3061 sizeof (struct aarch64_erratum_835769_fix
)
3067 fixes
[num_fixes
].input_bfd
= input_bfd
;
3068 fixes
[num_fixes
].section
= section
;
3069 fixes
[num_fixes
].offset
= i
+ 4;
3070 fixes
[num_fixes
].veneered_insn
= insn_2
;
3071 fixes
[num_fixes
].stub_name
= stub_name
;
3072 fixes
[num_fixes
].stub_type
= aarch64_stub_erratum_835769_veneer
;
3077 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3082 *num_fixes_p
= num_fixes
;
3083 *fix_table_size_p
= fix_table_size
;
3087 /* Find or create a stub section. Returns a pointer to the stub section, and
3088 the section to which the stub section will be attached (in *LINK_SEC_P).
3089 LINK_SEC_P may be NULL. */
3092 elf_aarch64_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3093 struct elf_aarch64_link_hash_table
*htab
)
3098 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3099 BFD_ASSERT (link_sec
!= NULL
);
3100 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3102 if (stub_sec
== NULL
)
3104 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3105 if (stub_sec
== NULL
)
3111 namelen
= strlen (link_sec
->name
);
3112 len
= namelen
+ sizeof (STUB_SUFFIX
);
3113 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
3117 memcpy (s_name
, link_sec
->name
, namelen
);
3118 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3119 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
3121 if (stub_sec
== NULL
)
3123 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3125 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3129 *link_sec_p
= link_sec
;
3134 /* Determine and set the size of the stub section for a final link.
3136 The basic idea here is to examine all the relocations looking for
3137 PC-relative calls to a target that is unreachable with a "bl"
3141 elfNN_aarch64_size_stubs (bfd
*output_bfd
,
3143 struct bfd_link_info
*info
,
3144 bfd_signed_vma group_size
,
3145 asection
* (*add_stub_section
) (const char *,
3147 void (*layout_sections_again
) (void))
3149 bfd_size_type stub_group_size
;
3150 bfd_boolean stubs_always_before_branch
;
3151 bfd_boolean stub_changed
= 0;
3152 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3153 struct aarch64_erratum_835769_fix
*erratum_835769_fixes
= NULL
;
3154 unsigned int num_erratum_835769_fixes
= 0;
3155 unsigned int erratum_835769_fix_table_size
= 10;
3158 if (htab
->fix_erratum_835769
)
3160 erratum_835769_fixes
3161 = (struct aarch64_erratum_835769_fix
*)
3163 (sizeof (struct aarch64_erratum_835769_fix
) *
3164 erratum_835769_fix_table_size
);
3165 if (erratum_835769_fixes
== NULL
)
3166 goto error_ret_free_local
;
3169 /* Propagate mach to stub bfd, because it may not have been
3170 finalized when we created stub_bfd. */
3171 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
3172 bfd_get_mach (output_bfd
));
3174 /* Stash our params away. */
3175 htab
->stub_bfd
= stub_bfd
;
3176 htab
->add_stub_section
= add_stub_section
;
3177 htab
->layout_sections_again
= layout_sections_again
;
3178 stubs_always_before_branch
= group_size
< 0;
3180 stub_group_size
= -group_size
;
3182 stub_group_size
= group_size
;
3184 if (stub_group_size
== 1)
3186 /* Default values. */
3187 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3188 stub_group_size
= 127 * 1024 * 1024;
3191 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3196 unsigned int bfd_indx
;
3198 unsigned prev_num_erratum_835769_fixes
= num_erratum_835769_fixes
;
3200 num_erratum_835769_fixes
= 0;
3201 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
3202 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3204 Elf_Internal_Shdr
*symtab_hdr
;
3206 Elf_Internal_Sym
*local_syms
= NULL
;
3208 /* We'll need the symbol table in a second. */
3209 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3210 if (symtab_hdr
->sh_info
== 0)
3213 /* Walk over each section attached to the input bfd. */
3214 for (section
= input_bfd
->sections
;
3215 section
!= NULL
; section
= section
->next
)
3217 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
3219 /* If there aren't any relocs, then there's nothing more
3221 if ((section
->flags
& SEC_RELOC
) == 0
3222 || section
->reloc_count
== 0
3223 || (section
->flags
& SEC_CODE
) == 0)
3226 /* If this section is a link-once section that will be
3227 discarded, then don't create any stubs. */
3228 if (section
->output_section
== NULL
3229 || section
->output_section
->owner
!= output_bfd
)
3232 /* Get the relocs. */
3234 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
3235 NULL
, info
->keep_memory
);
3236 if (internal_relocs
== NULL
)
3237 goto error_ret_free_local
;
3239 /* Now examine each relocation. */
3240 irela
= internal_relocs
;
3241 irelaend
= irela
+ section
->reloc_count
;
3242 for (; irela
< irelaend
; irela
++)
3244 unsigned int r_type
, r_indx
;
3245 enum elf_aarch64_stub_type stub_type
;
3246 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3249 bfd_vma destination
;
3250 struct elf_aarch64_link_hash_entry
*hash
;
3251 const char *sym_name
;
3253 const asection
*id_sec
;
3254 unsigned char st_type
;
3257 r_type
= ELFNN_R_TYPE (irela
->r_info
);
3258 r_indx
= ELFNN_R_SYM (irela
->r_info
);
3260 if (r_type
>= (unsigned int) R_AARCH64_end
)
3262 bfd_set_error (bfd_error_bad_value
);
3263 error_ret_free_internal
:
3264 if (elf_section_data (section
)->relocs
== NULL
)
3265 free (internal_relocs
);
3266 goto error_ret_free_local
;
3269 /* Only look for stubs on unconditional branch and
3270 branch and link instructions. */
3271 if (r_type
!= (unsigned int) AARCH64_R (CALL26
)
3272 && r_type
!= (unsigned int) AARCH64_R (JUMP26
))
3275 /* Now determine the call target, its name, value,
3282 if (r_indx
< symtab_hdr
->sh_info
)
3284 /* It's a local symbol. */
3285 Elf_Internal_Sym
*sym
;
3286 Elf_Internal_Shdr
*hdr
;
3288 if (local_syms
== NULL
)
3291 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3292 if (local_syms
== NULL
)
3294 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3295 symtab_hdr
->sh_info
, 0,
3297 if (local_syms
== NULL
)
3298 goto error_ret_free_internal
;
3301 sym
= local_syms
+ r_indx
;
3302 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
3303 sym_sec
= hdr
->bfd_section
;
3305 /* This is an undefined symbol. It can never
3309 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
3310 sym_value
= sym
->st_value
;
3311 destination
= (sym_value
+ irela
->r_addend
3312 + sym_sec
->output_offset
3313 + sym_sec
->output_section
->vma
);
3314 st_type
= ELF_ST_TYPE (sym
->st_info
);
3316 = bfd_elf_string_from_elf_section (input_bfd
,
3317 symtab_hdr
->sh_link
,
3324 e_indx
= r_indx
- symtab_hdr
->sh_info
;
3325 hash
= ((struct elf_aarch64_link_hash_entry
*)
3326 elf_sym_hashes (input_bfd
)[e_indx
]);
3328 while (hash
->root
.root
.type
== bfd_link_hash_indirect
3329 || hash
->root
.root
.type
== bfd_link_hash_warning
)
3330 hash
= ((struct elf_aarch64_link_hash_entry
*)
3331 hash
->root
.root
.u
.i
.link
);
3333 if (hash
->root
.root
.type
== bfd_link_hash_defined
3334 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
3336 struct elf_aarch64_link_hash_table
*globals
=
3337 elf_aarch64_hash_table (info
);
3338 sym_sec
= hash
->root
.root
.u
.def
.section
;
3339 sym_value
= hash
->root
.root
.u
.def
.value
;
3340 /* For a destination in a shared library,
3341 use the PLT stub as target address to
3342 decide whether a branch stub is
3344 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
3345 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
3347 sym_sec
= globals
->root
.splt
;
3348 sym_value
= hash
->root
.plt
.offset
;
3349 if (sym_sec
->output_section
!= NULL
)
3350 destination
= (sym_value
3351 + sym_sec
->output_offset
3353 sym_sec
->output_section
->vma
);
3355 else if (sym_sec
->output_section
!= NULL
)
3356 destination
= (sym_value
+ irela
->r_addend
3357 + sym_sec
->output_offset
3358 + sym_sec
->output_section
->vma
);
3360 else if (hash
->root
.root
.type
== bfd_link_hash_undefined
3361 || (hash
->root
.root
.type
3362 == bfd_link_hash_undefweak
))
3364 /* For a shared library, use the PLT stub as
3365 target address to decide whether a long
3366 branch stub is needed.
3367 For absolute code, they cannot be handled. */
3368 struct elf_aarch64_link_hash_table
*globals
=
3369 elf_aarch64_hash_table (info
);
3371 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
3372 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
3374 sym_sec
= globals
->root
.splt
;
3375 sym_value
= hash
->root
.plt
.offset
;
3376 if (sym_sec
->output_section
!= NULL
)
3377 destination
= (sym_value
3378 + sym_sec
->output_offset
3380 sym_sec
->output_section
->vma
);
3387 bfd_set_error (bfd_error_bad_value
);
3388 goto error_ret_free_internal
;
3390 st_type
= ELF_ST_TYPE (hash
->root
.type
);
3391 sym_name
= hash
->root
.root
.root
.string
;
3394 /* Determine what (if any) linker stub is needed. */
3395 stub_type
= aarch64_type_of_stub
3396 (info
, section
, irela
, st_type
, hash
, destination
);
3397 if (stub_type
== aarch64_stub_none
)
3400 /* Support for grouping stub sections. */
3401 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
3403 /* Get the name of this stub. */
3404 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, hash
,
3407 goto error_ret_free_internal
;
3410 aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
3411 stub_name
, FALSE
, FALSE
);
3412 if (stub_entry
!= NULL
)
3414 /* The proper stub has already been created. */
3419 stub_entry
= elfNN_aarch64_add_stub (stub_name
, section
,
3421 if (stub_entry
== NULL
)
3424 goto error_ret_free_internal
;
3427 stub_entry
->target_value
= sym_value
;
3428 stub_entry
->target_section
= sym_sec
;
3429 stub_entry
->stub_type
= stub_type
;
3430 stub_entry
->h
= hash
;
3431 stub_entry
->st_type
= st_type
;
3433 if (sym_name
== NULL
)
3434 sym_name
= "unnamed";
3435 len
= sizeof (STUB_ENTRY_NAME
) + strlen (sym_name
);
3436 stub_entry
->output_name
= bfd_alloc (htab
->stub_bfd
, len
);
3437 if (stub_entry
->output_name
== NULL
)
3440 goto error_ret_free_internal
;
3443 snprintf (stub_entry
->output_name
, len
, STUB_ENTRY_NAME
,
3446 stub_changed
= TRUE
;
3449 /* We're done with the internal relocs, free them. */
3450 if (elf_section_data (section
)->relocs
== NULL
)
3451 free (internal_relocs
);
3454 if (htab
->fix_erratum_835769
)
3456 /* Scan for sequences which might trigger erratum 835769. */
3457 if (erratum_835769_scan (input_bfd
, info
, &erratum_835769_fixes
,
3458 &num_erratum_835769_fixes
,
3459 &erratum_835769_fix_table_size
) != 0)
3460 goto error_ret_free_local
;
3464 if (prev_num_erratum_835769_fixes
!= num_erratum_835769_fixes
)
3465 stub_changed
= TRUE
;
3470 /* OK, we've added some stubs. Find out the new size of the
3472 for (stub_sec
= htab
->stub_bfd
->sections
;
3473 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
3475 /* Ignore non-stub sections. */
3476 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
3481 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_size_one_stub
, htab
);
3483 /* Add erratum 835769 veneers to stub section sizes too. */
3484 if (htab
->fix_erratum_835769
)
3485 for (i
= 0; i
< num_erratum_835769_fixes
; i
++)
3487 stub_sec
= elf_aarch64_create_or_find_stub_sec (NULL
,
3488 erratum_835769_fixes
[i
].section
, htab
);
3490 if (stub_sec
== NULL
)
3491 goto error_ret_free_local
;
3493 stub_sec
->size
+= 8;
3496 /* Ask the linker to do its stuff. */
3497 (*htab
->layout_sections_again
) ();
3498 stub_changed
= FALSE
;
3501 /* Add stubs for erratum 835769 fixes now. */
3502 if (htab
->fix_erratum_835769
)
3504 for (i
= 0; i
< num_erratum_835769_fixes
; i
++)
3506 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3507 char *stub_name
= erratum_835769_fixes
[i
].stub_name
;
3508 asection
*section
= erratum_835769_fixes
[i
].section
;
3509 unsigned int section_id
= erratum_835769_fixes
[i
].section
->id
;
3510 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
3511 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
3513 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
3514 stub_name
, TRUE
, FALSE
);
3515 if (stub_entry
== NULL
)
3517 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3523 stub_entry
->stub_sec
= stub_sec
;
3524 stub_entry
->stub_offset
= 0;
3525 stub_entry
->id_sec
= link_sec
;
3526 stub_entry
->stub_type
= erratum_835769_fixes
[i
].stub_type
;
3527 stub_entry
->target_section
= section
;
3528 stub_entry
->target_value
= erratum_835769_fixes
[i
].offset
;
3529 stub_entry
->veneered_insn
= erratum_835769_fixes
[i
].veneered_insn
;
3530 stub_entry
->output_name
= erratum_835769_fixes
[i
].stub_name
;
3533 /* Stash the erratum 835769 fix array for use later in
3534 elfNN_aarch64_write_section(). */
3535 htab
->aarch64_erratum_835769_fixes
= erratum_835769_fixes
;
3536 htab
->num_aarch64_erratum_835769_fixes
= num_erratum_835769_fixes
;
3540 htab
->aarch64_erratum_835769_fixes
= NULL
;
3541 htab
->num_aarch64_erratum_835769_fixes
= 0;
3546 error_ret_free_local
:
3550 /* Build all the stubs associated with the current output file. The
3551 stubs are kept in a hash table attached to the main linker hash
3552 table. We also set up the .plt entries for statically linked PIC
3553 functions here. This function is called via aarch64_elf_finish in the
3557 elfNN_aarch64_build_stubs (struct bfd_link_info
*info
)
3560 struct bfd_hash_table
*table
;
3561 struct elf_aarch64_link_hash_table
*htab
;
3563 htab
= elf_aarch64_hash_table (info
);
3565 for (stub_sec
= htab
->stub_bfd
->sections
;
3566 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
3570 /* Ignore non-stub sections. */
3571 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
3574 /* Allocate memory to hold the linker stubs. */
3575 size
= stub_sec
->size
;
3576 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
3577 if (stub_sec
->contents
== NULL
&& size
!= 0)
3582 /* Build the stubs as directed by the stub hash table. */
3583 table
= &htab
->stub_hash_table
;
3584 bfd_hash_traverse (table
, aarch64_build_one_stub
, info
);
3590 /* Add an entry to the code/data map for section SEC. */
3593 elfNN_aarch64_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
3595 struct _aarch64_elf_section_data
*sec_data
=
3596 elf_aarch64_section_data (sec
);
3597 unsigned int newidx
;
3599 if (sec_data
->map
== NULL
)
3601 sec_data
->map
= bfd_malloc (sizeof (elf_aarch64_section_map
));
3602 sec_data
->mapcount
= 0;
3603 sec_data
->mapsize
= 1;
3606 newidx
= sec_data
->mapcount
++;
3608 if (sec_data
->mapcount
> sec_data
->mapsize
)
3610 sec_data
->mapsize
*= 2;
3611 sec_data
->map
= bfd_realloc_or_free
3612 (sec_data
->map
, sec_data
->mapsize
* sizeof (elf_aarch64_section_map
));
3617 sec_data
->map
[newidx
].vma
= vma
;
3618 sec_data
->map
[newidx
].type
= type
;
3623 /* Initialise maps of insn/data for input BFDs. */
3625 bfd_elfNN_aarch64_init_maps (bfd
*abfd
)
3627 Elf_Internal_Sym
*isymbuf
;
3628 Elf_Internal_Shdr
*hdr
;
3629 unsigned int i
, localsyms
;
3631 /* Make sure that we are dealing with an AArch64 elf binary. */
3632 if (!is_aarch64_elf (abfd
))
3635 if ((abfd
->flags
& DYNAMIC
) != 0)
3638 hdr
= &elf_symtab_hdr (abfd
);
3639 localsyms
= hdr
->sh_info
;
3641 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3642 should contain the number of local symbols, which should come before any
3643 global symbols. Mapping symbols are always local. */
3644 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
, NULL
);
3646 /* No internal symbols read? Skip this BFD. */
3647 if (isymbuf
== NULL
)
3650 for (i
= 0; i
< localsyms
; i
++)
3652 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
3653 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3656 if (sec
!= NULL
&& ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
3658 name
= bfd_elf_string_from_elf_section (abfd
,
3662 if (bfd_is_aarch64_special_symbol_name
3663 (name
, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP
))
3664 elfNN_aarch64_section_map_add (sec
, name
[1], isym
->st_value
);
3669 /* Set option values needed during linking. */
3671 bfd_elfNN_aarch64_set_options (struct bfd
*output_bfd
,
3672 struct bfd_link_info
*link_info
,
3674 int no_wchar_warn
, int pic_veneer
,
3675 int fix_erratum_835769
)
3677 struct elf_aarch64_link_hash_table
*globals
;
3679 globals
= elf_aarch64_hash_table (link_info
);
3680 globals
->pic_veneer
= pic_veneer
;
3681 globals
->fix_erratum_835769
= fix_erratum_835769
;
3683 BFD_ASSERT (is_aarch64_elf (output_bfd
));
3684 elf_aarch64_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
3685 elf_aarch64_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
3689 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry
*h
,
3690 struct elf_aarch64_link_hash_table
3691 *globals
, struct bfd_link_info
*info
,
3692 bfd_vma value
, bfd
*output_bfd
,
3693 bfd_boolean
*unresolved_reloc_p
)
3695 bfd_vma off
= (bfd_vma
) - 1;
3696 asection
*basegot
= globals
->root
.sgot
;
3697 bfd_boolean dyn
= globals
->root
.dynamic_sections_created
;
3701 BFD_ASSERT (basegot
!= NULL
);
3702 off
= h
->got
.offset
;
3703 BFD_ASSERT (off
!= (bfd_vma
) - 1);
3704 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3706 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3707 || (ELF_ST_VISIBILITY (h
->other
)
3708 && h
->root
.type
== bfd_link_hash_undefweak
))
3710 /* This is actually a static link, or it is a -Bsymbolic link
3711 and the symbol is defined locally. We must initialize this
3712 entry in the global offset table. Since the offset must
3713 always be a multiple of 8 (4 in the case of ILP32), we use
3714 the least significant bit to record whether we have
3715 initialized it already.
3716 When doing a dynamic link, we create a .rel(a).got relocation
3717 entry to initialize the value. This is done in the
3718 finish_dynamic_symbol routine. */
3723 bfd_put_NN (output_bfd
, value
, basegot
->contents
+ off
);
3728 *unresolved_reloc_p
= FALSE
;
3730 off
= off
+ basegot
->output_section
->vma
+ basegot
->output_offset
;
3736 /* Change R_TYPE to a more efficient access model where possible,
3737 return the new reloc type. */
3739 static bfd_reloc_code_real_type
3740 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type
,
3741 struct elf_link_hash_entry
*h
)
3743 bfd_boolean is_local
= h
== NULL
;
3747 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
3748 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
3750 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3751 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
);
3753 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
3755 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3758 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
3760 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3761 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
3763 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
3764 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
3766 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3767 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
);
3769 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
3770 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
: r_type
;
3772 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
3773 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
: r_type
;
3775 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
3778 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
3780 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
3781 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
3783 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
3784 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
3785 /* Instructions with these relocations will become NOPs. */
3786 return BFD_RELOC_AARCH64_NONE
;
3796 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type
)
3800 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
3801 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
3802 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
3803 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
3806 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
3807 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
3808 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
3811 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
3812 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
3813 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
3814 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
3815 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
3816 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
3817 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
3818 return GOT_TLSDESC_GD
;
3820 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
3821 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
3822 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
3823 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
3826 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
3827 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
3828 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
3829 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
3830 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
3831 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
3832 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
3833 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
3843 aarch64_can_relax_tls (bfd
*input_bfd
,
3844 struct bfd_link_info
*info
,
3845 bfd_reloc_code_real_type r_type
,
3846 struct elf_link_hash_entry
*h
,
3847 unsigned long r_symndx
)
3849 unsigned int symbol_got_type
;
3850 unsigned int reloc_got_type
;
3852 if (! IS_AARCH64_TLS_RELOC (r_type
))
3855 symbol_got_type
= elfNN_aarch64_symbol_got_type (h
, input_bfd
, r_symndx
);
3856 reloc_got_type
= aarch64_reloc_got_type (r_type
);
3858 if (symbol_got_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (reloc_got_type
))
3864 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
)
3870 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
3873 static bfd_reloc_code_real_type
3874 aarch64_tls_transition (bfd
*input_bfd
,
3875 struct bfd_link_info
*info
,
3876 unsigned int r_type
,
3877 struct elf_link_hash_entry
*h
,
3878 unsigned long r_symndx
)
3880 bfd_reloc_code_real_type bfd_r_type
3881 = elfNN_aarch64_bfd_reloc_from_type (r_type
);
3883 if (! aarch64_can_relax_tls (input_bfd
, info
, bfd_r_type
, h
, r_symndx
))
3886 return aarch64_tls_transition_without_check (bfd_r_type
, h
);
3889 /* Return the base VMA address which should be subtracted from real addresses
3890 when resolving R_AARCH64_TLS_DTPREL relocation. */
3893 dtpoff_base (struct bfd_link_info
*info
)
3895 /* If tls_sec is NULL, we should have signalled an error already. */
3896 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
3897 return elf_hash_table (info
)->tls_sec
->vma
;
3900 /* Return the base VMA address which should be subtracted from real addresses
3901 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
3904 tpoff_base (struct bfd_link_info
*info
)
3906 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3908 /* If tls_sec is NULL, we should have signalled an error already. */
3909 BFD_ASSERT (htab
->tls_sec
!= NULL
);
3911 bfd_vma base
= align_power ((bfd_vma
) TCB_SIZE
,
3912 htab
->tls_sec
->alignment_power
);
3913 return htab
->tls_sec
->vma
- base
;
3917 symbol_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
3918 unsigned long r_symndx
)
3920 /* Calculate the address of the GOT entry for symbol
3921 referred to in h. */
3923 return &h
->got
.offset
;
3927 struct elf_aarch64_local_symbol
*l
;
3929 l
= elf_aarch64_locals (input_bfd
);
3930 return &l
[r_symndx
].got_offset
;
3935 symbol_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
3936 unsigned long r_symndx
)
3939 p
= symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
3944 symbol_got_offset_mark_p (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
3945 unsigned long r_symndx
)
3948 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
3953 symbol_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
3954 unsigned long r_symndx
)
3957 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
3963 symbol_tlsdesc_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
3964 unsigned long r_symndx
)
3966 /* Calculate the address of the GOT entry for symbol
3967 referred to in h. */
3970 struct elf_aarch64_link_hash_entry
*eh
;
3971 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
3972 return &eh
->tlsdesc_got_jump_table_offset
;
3977 struct elf_aarch64_local_symbol
*l
;
3979 l
= elf_aarch64_locals (input_bfd
);
3980 return &l
[r_symndx
].tlsdesc_got_jump_table_offset
;
3985 symbol_tlsdesc_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
3986 unsigned long r_symndx
)
3989 p
= symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
3994 symbol_tlsdesc_got_offset_mark_p (bfd
*input_bfd
,
3995 struct elf_link_hash_entry
*h
,
3996 unsigned long r_symndx
)
3999 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4004 symbol_tlsdesc_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4005 unsigned long r_symndx
)
4008 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4013 /* Data for make_branch_to_erratum_835769_stub(). */
4015 struct erratum_835769_branch_to_stub_data
4017 asection
*output_section
;
4021 /* Helper to insert branches to erratum 835769 stubs in the right
4022 places for a particular section. */
4025 make_branch_to_erratum_835769_stub (struct bfd_hash_entry
*gen_entry
,
4028 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4029 struct erratum_835769_branch_to_stub_data
*data
;
4031 unsigned long branch_insn
= 0;
4032 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
4033 bfd_signed_vma branch_offset
;
4034 unsigned int target
;
4037 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4038 data
= (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4040 if (stub_entry
->target_section
!= data
->output_section
4041 || stub_entry
->stub_type
!= aarch64_stub_erratum_835769_veneer
)
4044 contents
= data
->contents
;
4045 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4046 + stub_entry
->target_section
->output_offset
4047 + stub_entry
->target_value
;
4048 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4049 + stub_entry
->stub_sec
->output_offset
4050 + stub_entry
->stub_offset
;
4051 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4053 abfd
= stub_entry
->target_section
->owner
;
4054 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4055 (*_bfd_error_handler
)
4056 (_("%B: error: Erratum 835769 stub out "
4057 "of range (input file too large)"), abfd
);
4059 target
= stub_entry
->target_value
;
4060 branch_insn
= 0x14000000;
4061 branch_offset
>>= 2;
4062 branch_offset
&= 0x3ffffff;
4063 branch_insn
|= branch_offset
;
4064 bfd_putl32 (branch_insn
, &contents
[target
]);
4070 elfNN_aarch64_write_section (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4071 struct bfd_link_info
*link_info
,
4076 struct elf_aarch64_link_hash_table
*globals
=
4077 elf_aarch64_hash_table (link_info
);
4079 if (globals
== NULL
)
4082 /* Fix code to point to erratum 835769 stubs. */
4083 if (globals
->fix_erratum_835769
)
4085 struct erratum_835769_branch_to_stub_data data
;
4087 data
.output_section
= sec
;
4088 data
.contents
= contents
;
4089 bfd_hash_traverse (&globals
->stub_hash_table
,
4090 make_branch_to_erratum_835769_stub
, &data
);
4096 /* Perform a relocation as part of a final link. */
4097 static bfd_reloc_status_type
4098 elfNN_aarch64_final_link_relocate (reloc_howto_type
*howto
,
4101 asection
*input_section
,
4103 Elf_Internal_Rela
*rel
,
4105 struct bfd_link_info
*info
,
4107 struct elf_link_hash_entry
*h
,
4108 bfd_boolean
*unresolved_reloc_p
,
4109 bfd_boolean save_addend
,
4110 bfd_vma
*saved_addend
,
4111 Elf_Internal_Sym
*sym
)
4113 Elf_Internal_Shdr
*symtab_hdr
;
4114 unsigned int r_type
= howto
->type
;
4115 bfd_reloc_code_real_type bfd_r_type
4116 = elfNN_aarch64_bfd_reloc_from_howto (howto
);
4117 bfd_reloc_code_real_type new_bfd_r_type
;
4118 unsigned long r_symndx
;
4119 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
4121 bfd_signed_vma signed_addend
;
4122 struct elf_aarch64_link_hash_table
*globals
;
4123 bfd_boolean weak_undef_p
;
4125 globals
= elf_aarch64_hash_table (info
);
4127 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4129 BFD_ASSERT (is_aarch64_elf (input_bfd
));
4131 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
4133 /* It is possible to have linker relaxations on some TLS access
4134 models. Update our information here. */
4135 new_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
, h
, r_symndx
);
4136 if (new_bfd_r_type
!= bfd_r_type
)
4138 bfd_r_type
= new_bfd_r_type
;
4139 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
4140 BFD_ASSERT (howto
!= NULL
);
4141 r_type
= howto
->type
;
4144 place
= input_section
->output_section
->vma
4145 + input_section
->output_offset
+ rel
->r_offset
;
4147 /* Get addend, accumulating the addend for consecutive relocs
4148 which refer to the same offset. */
4149 signed_addend
= saved_addend
? *saved_addend
: 0;
4150 signed_addend
+= rel
->r_addend
;
4152 weak_undef_p
= (h
? h
->root
.type
== bfd_link_hash_undefweak
4153 : bfd_is_und_section (sym_sec
));
4155 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4156 it here if it is defined in a non-shared object. */
4158 && h
->type
== STT_GNU_IFUNC
4166 if ((input_section
->flags
& SEC_ALLOC
) == 0
4167 || h
->plt
.offset
== (bfd_vma
) -1)
4170 /* STT_GNU_IFUNC symbol must go through PLT. */
4171 plt
= globals
->root
.splt
? globals
->root
.splt
: globals
->root
.iplt
;
4172 value
= (plt
->output_section
->vma
+ plt
->output_offset
+ h
->plt
.offset
);
4177 if (h
->root
.root
.string
)
4178 name
= h
->root
.root
.string
;
4180 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4182 (*_bfd_error_handler
)
4183 (_("%B: relocation %s against STT_GNU_IFUNC "
4184 "symbol `%s' isn't handled by %s"), input_bfd
,
4185 howto
->name
, name
, __FUNCTION__
);
4186 bfd_set_error (bfd_error_bad_value
);
4189 case BFD_RELOC_AARCH64_NN
:
4190 if (rel
->r_addend
!= 0)
4192 if (h
->root
.root
.string
)
4193 name
= h
->root
.root
.string
;
4195 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4197 (*_bfd_error_handler
)
4198 (_("%B: relocation %s against STT_GNU_IFUNC "
4199 "symbol `%s' has non-zero addend: %d"),
4200 input_bfd
, howto
->name
, name
, rel
->r_addend
);
4201 bfd_set_error (bfd_error_bad_value
);
4205 /* Generate dynamic relocation only when there is a
4206 non-GOT reference in a shared object. */
4207 if (info
->shared
&& h
->non_got_ref
)
4209 Elf_Internal_Rela outrel
;
4212 /* Need a dynamic relocation to get the real function
4214 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
4218 if (outrel
.r_offset
== (bfd_vma
) -1
4219 || outrel
.r_offset
== (bfd_vma
) -2)
4222 outrel
.r_offset
+= (input_section
->output_section
->vma
4223 + input_section
->output_offset
);
4225 if (h
->dynindx
== -1
4227 || info
->executable
)
4229 /* This symbol is resolved locally. */
4230 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
4231 outrel
.r_addend
= (h
->root
.u
.def
.value
4232 + h
->root
.u
.def
.section
->output_section
->vma
4233 + h
->root
.u
.def
.section
->output_offset
);
4237 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
4238 outrel
.r_addend
= 0;
4241 sreloc
= globals
->root
.irelifunc
;
4242 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4244 /* If this reloc is against an external symbol, we
4245 do not want to fiddle with the addend. Otherwise,
4246 we need to include the symbol value so that it
4247 becomes an addend for the dynamic reloc. For an
4248 internal symbol, we have updated addend. */
4249 return bfd_reloc_ok
;
4252 case BFD_RELOC_AARCH64_JUMP26
:
4253 case BFD_RELOC_AARCH64_CALL26
:
4254 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4257 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
4259 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
4260 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
4261 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
4262 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
4263 base_got
= globals
->root
.sgot
;
4264 off
= h
->got
.offset
;
4266 if (base_got
== NULL
)
4269 if (off
== (bfd_vma
) -1)
4273 /* We can't use h->got.offset here to save state, or
4274 even just remember the offset, as finish_dynamic_symbol
4275 would use that as offset into .got. */
4277 if (globals
->root
.splt
!= NULL
)
4279 plt_index
= ((h
->plt
.offset
- globals
->plt_header_size
) /
4280 globals
->plt_entry_size
);
4281 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
4282 base_got
= globals
->root
.sgotplt
;
4286 plt_index
= h
->plt
.offset
/ globals
->plt_entry_size
;
4287 off
= plt_index
* GOT_ENTRY_SIZE
;
4288 base_got
= globals
->root
.igotplt
;
4291 if (h
->dynindx
== -1
4295 /* This references the local definition. We must
4296 initialize this entry in the global offset table.
4297 Since the offset must always be a multiple of 8,
4298 we use the least significant bit to record
4299 whether we have initialized it already.
4301 When doing a dynamic link, we create a .rela.got
4302 relocation entry to initialize the value. This
4303 is done in the finish_dynamic_symbol routine. */
4308 bfd_put_NN (output_bfd
, value
,
4309 base_got
->contents
+ off
);
4310 /* Note that this is harmless as -1 | 1 still is -1. */
4314 value
= (base_got
->output_section
->vma
4315 + base_got
->output_offset
+ off
);
4318 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
,
4320 unresolved_reloc_p
);
4321 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4323 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
, howto
, value
);
4324 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
4325 case BFD_RELOC_AARCH64_ADD_LO12
:
4332 case BFD_RELOC_AARCH64_NONE
:
4333 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4334 *unresolved_reloc_p
= FALSE
;
4335 return bfd_reloc_ok
;
4337 case BFD_RELOC_AARCH64_NN
:
4339 /* When generating a shared object or relocatable executable, these
4340 relocations are copied into the output file to be resolved at
4342 if (((info
->shared
== TRUE
) || globals
->root
.is_relocatable_executable
)
4343 && (input_section
->flags
& SEC_ALLOC
)
4345 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4346 || h
->root
.type
!= bfd_link_hash_undefweak
))
4348 Elf_Internal_Rela outrel
;
4350 bfd_boolean skip
, relocate
;
4353 *unresolved_reloc_p
= FALSE
;
4358 outrel
.r_addend
= signed_addend
;
4360 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4362 if (outrel
.r_offset
== (bfd_vma
) - 1)
4364 else if (outrel
.r_offset
== (bfd_vma
) - 2)
4370 outrel
.r_offset
+= (input_section
->output_section
->vma
4371 + input_section
->output_offset
);
4374 memset (&outrel
, 0, sizeof outrel
);
4377 && (!info
->shared
|| !SYMBOLIC_BIND (info
, h
) || !h
->def_regular
))
4378 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
4383 /* On SVR4-ish systems, the dynamic loader cannot
4384 relocate the text and data segments independently,
4385 so the symbol does not matter. */
4387 outrel
.r_info
= ELFNN_R_INFO (symbol
, AARCH64_R (RELATIVE
));
4388 outrel
.r_addend
+= value
;
4391 sreloc
= elf_section_data (input_section
)->sreloc
;
4392 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4393 return bfd_reloc_notsupported
;
4395 loc
= sreloc
->contents
+ sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
4396 bfd_elfNN_swap_reloca_out (output_bfd
, &outrel
, loc
);
4398 if (sreloc
->reloc_count
* RELOC_SIZE (globals
) > sreloc
->size
)
4400 /* Sanity to check that we have previously allocated
4401 sufficient space in the relocation section for the
4402 number of relocations we actually want to emit. */
4406 /* If this reloc is against an external symbol, we do not want to
4407 fiddle with the addend. Otherwise, we need to include the symbol
4408 value so that it becomes an addend for the dynamic reloc. */
4410 return bfd_reloc_ok
;
4412 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4413 contents
, rel
->r_offset
, value
,
4417 value
+= signed_addend
;
4420 case BFD_RELOC_AARCH64_JUMP26
:
4421 case BFD_RELOC_AARCH64_CALL26
:
4423 asection
*splt
= globals
->root
.splt
;
4424 bfd_boolean via_plt_p
=
4425 splt
!= NULL
&& h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) - 1;
4427 /* A call to an undefined weak symbol is converted to a jump to
4428 the next instruction unless a PLT entry will be created.
4429 The jump to the next instruction is optimized as a NOP.
4430 Do the same for local undefined symbols. */
4431 if (weak_undef_p
&& ! via_plt_p
)
4433 bfd_putl32 (INSN_NOP
, hit_data
);
4434 return bfd_reloc_ok
;
4437 /* If the call goes through a PLT entry, make sure to
4438 check distance to the right destination address. */
4441 value
= (splt
->output_section
->vma
4442 + splt
->output_offset
+ h
->plt
.offset
);
4443 *unresolved_reloc_p
= FALSE
;
4446 /* If the target symbol is global and marked as a function the
4447 relocation applies a function call or a tail call. In this
4448 situation we can veneer out of range branches. The veneers
4449 use IP0 and IP1 hence cannot be used arbitrary out of range
4450 branches that occur within the body of a function. */
4451 if (h
&& h
->type
== STT_FUNC
)
4453 /* Check if a stub has to be inserted because the destination
4455 if (! aarch64_valid_branch_p (value
, place
))
4457 /* The target is out of reach, so redirect the branch to
4458 the local stub for this function. */
4459 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4460 stub_entry
= elfNN_aarch64_get_stub_entry (input_section
,
4463 if (stub_entry
!= NULL
)
4464 value
= (stub_entry
->stub_offset
4465 + stub_entry
->stub_sec
->output_offset
4466 + stub_entry
->stub_sec
->output_section
->vma
);
4470 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4471 signed_addend
, weak_undef_p
);
4474 case BFD_RELOC_AARCH64_16
:
4476 case BFD_RELOC_AARCH64_32
:
4478 case BFD_RELOC_AARCH64_ADD_LO12
:
4479 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
4480 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
4481 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
4482 case BFD_RELOC_AARCH64_BRANCH19
:
4483 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
4484 case BFD_RELOC_AARCH64_LDST8_LO12
:
4485 case BFD_RELOC_AARCH64_LDST16_LO12
:
4486 case BFD_RELOC_AARCH64_LDST32_LO12
:
4487 case BFD_RELOC_AARCH64_LDST64_LO12
:
4488 case BFD_RELOC_AARCH64_LDST128_LO12
:
4489 case BFD_RELOC_AARCH64_MOVW_G0_S
:
4490 case BFD_RELOC_AARCH64_MOVW_G1_S
:
4491 case BFD_RELOC_AARCH64_MOVW_G2_S
:
4492 case BFD_RELOC_AARCH64_MOVW_G0
:
4493 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
4494 case BFD_RELOC_AARCH64_MOVW_G1
:
4495 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
4496 case BFD_RELOC_AARCH64_MOVW_G2
:
4497 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
4498 case BFD_RELOC_AARCH64_MOVW_G3
:
4499 case BFD_RELOC_AARCH64_16_PCREL
:
4500 case BFD_RELOC_AARCH64_32_PCREL
:
4501 case BFD_RELOC_AARCH64_64_PCREL
:
4502 case BFD_RELOC_AARCH64_TSTBR14
:
4503 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4504 signed_addend
, weak_undef_p
);
4507 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
4508 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
4509 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
4510 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
4511 if (globals
->root
.sgot
== NULL
)
4512 BFD_ASSERT (h
!= NULL
);
4516 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
4518 unresolved_reloc_p
);
4519 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4524 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4525 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4526 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4527 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4528 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
4529 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
4530 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4531 if (globals
->root
.sgot
== NULL
)
4532 return bfd_reloc_notsupported
;
4534 value
= (symbol_got_offset (input_bfd
, h
, r_symndx
)
4535 + globals
->root
.sgot
->output_section
->vma
4536 + globals
->root
.sgot
->output_offset
);
4538 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4540 *unresolved_reloc_p
= FALSE
;
4543 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
4544 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
4545 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
4546 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
4547 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
4548 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
4549 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
4550 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
4551 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4552 signed_addend
- tpoff_base (info
),
4554 *unresolved_reloc_p
= FALSE
;
4557 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
4558 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
4559 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4560 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4561 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
4562 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
4563 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
4564 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4565 if (globals
->root
.sgot
== NULL
)
4566 return bfd_reloc_notsupported
;
4567 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
4568 + globals
->root
.sgotplt
->output_section
->vma
4569 + globals
->root
.sgotplt
->output_offset
4570 + globals
->sgotplt_jump_table_size
);
4572 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
4574 *unresolved_reloc_p
= FALSE
;
4578 return bfd_reloc_notsupported
;
4582 *saved_addend
= value
;
4584 /* Only apply the final relocation in a sequence. */
4586 return bfd_reloc_continue
;
4588 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
4592 /* Handle TLS relaxations. Relaxing is possible for symbols that use
4593 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
4596 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
4597 is to then call final_link_relocate. Return other values in the
4600 static bfd_reloc_status_type
4601 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table
*globals
,
4602 bfd
*input_bfd
, bfd_byte
*contents
,
4603 Elf_Internal_Rela
*rel
, struct elf_link_hash_entry
*h
)
4605 bfd_boolean is_local
= h
== NULL
;
4606 unsigned int r_type
= ELFNN_R_TYPE (rel
->r_info
);
4609 BFD_ASSERT (globals
&& input_bfd
&& contents
&& rel
);
4611 switch (elfNN_aarch64_bfd_reloc_from_type (r_type
))
4613 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4614 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4617 /* GD->LE relaxation:
4618 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
4620 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
4622 bfd_putl32 (0xd2a00000, contents
+ rel
->r_offset
);
4623 return bfd_reloc_continue
;
4627 /* GD->IE relaxation:
4628 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
4630 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
4632 return bfd_reloc_continue
;
4635 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4639 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4642 /* Tiny TLSDESC->LE relaxation:
4643 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
4644 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
4648 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
4649 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
4651 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
4652 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
4653 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
4655 bfd_putl32 (0xd2a00000, contents
+ rel
->r_offset
);
4656 bfd_putl32 (0xf2800000, contents
+ rel
->r_offset
+ 4);
4657 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
4658 return bfd_reloc_continue
;
4662 /* Tiny TLSDESC->IE relaxation:
4663 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
4664 adr x0, :tlsdesc:var => nop
4668 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
4669 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
4671 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
4672 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
4674 bfd_putl32 (0x58000000, contents
+ rel
->r_offset
);
4675 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
4676 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
4677 return bfd_reloc_continue
;
4680 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4683 /* Tiny GD->LE relaxation:
4684 adr x0, :tlsgd:var => mrs x1, tpidr_el0
4685 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
4686 nop => add x0, x0, #:tprel_lo12_nc:x
4689 /* First kill the tls_get_addr reloc on the bl instruction. */
4690 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
4692 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 0);
4693 bfd_putl32 (0x91400020, contents
+ rel
->r_offset
+ 4);
4694 bfd_putl32 (0x91000000, contents
+ rel
->r_offset
+ 8);
4696 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
4697 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
));
4698 rel
[1].r_offset
= rel
->r_offset
+ 8;
4700 /* Move the current relocation to the second instruction in
4703 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
4704 AARCH64_R (TLSLE_ADD_TPREL_HI12
));
4705 return bfd_reloc_continue
;
4709 /* Tiny GD->IE relaxation:
4710 adr x0, :tlsgd:var => ldr x0, :gottprel:var
4711 bl __tls_get_addr => mrs x1, tpidr_el0
4712 nop => add x0, x0, x1
4715 /* First kill the tls_get_addr reloc on the bl instruction. */
4716 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
4717 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
4719 bfd_putl32 (0x58000000, contents
+ rel
->r_offset
);
4720 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
4721 bfd_putl32 (0x8b000020, contents
+ rel
->r_offset
+ 8);
4722 return bfd_reloc_continue
;
4725 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4726 return bfd_reloc_continue
;
4728 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
4731 /* GD->LE relaxation:
4732 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
4734 bfd_putl32 (0xf2800000, contents
+ rel
->r_offset
);
4735 return bfd_reloc_continue
;
4739 /* GD->IE relaxation:
4740 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
4742 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4744 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
4745 return bfd_reloc_continue
;
4748 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4751 /* GD->LE relaxation
4752 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
4753 bl __tls_get_addr => mrs x1, tpidr_el0
4754 nop => add x0, x1, x0
4757 /* First kill the tls_get_addr reloc on the bl instruction. */
4758 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
4759 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
4761 bfd_putl32 (0xf2800000, contents
+ rel
->r_offset
);
4762 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
4763 bfd_putl32 (0x8b000020, contents
+ rel
->r_offset
+ 8);
4764 return bfd_reloc_continue
;
4768 /* GD->IE relaxation
4769 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
4770 BL __tls_get_addr => mrs x1, tpidr_el0
4772 NOP => add x0, x1, x0
4775 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
4777 /* Remove the relocation on the BL instruction. */
4778 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
4780 bfd_putl32 (0xf9400000, contents
+ rel
->r_offset
);
4782 /* We choose to fixup the BL and NOP instructions using the
4783 offset from the second relocation to allow flexibility in
4784 scheduling instructions between the ADD and BL. */
4785 bfd_putl32 (0xd53bd041, contents
+ rel
[1].r_offset
);
4786 bfd_putl32 (0x8b000020, contents
+ rel
[1].r_offset
+ 4);
4787 return bfd_reloc_continue
;
4790 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
4791 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4792 /* GD->IE/LE relaxation:
4793 add x0, x0, #:tlsdesc_lo12:var => nop
4796 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
);
4797 return bfd_reloc_ok
;
4799 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4800 /* IE->LE relaxation:
4801 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
4805 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4806 bfd_putl32 (0xd2a00000 | (insn
& 0x1f), contents
+ rel
->r_offset
);
4808 return bfd_reloc_continue
;
4810 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
4811 /* IE->LE relaxation:
4812 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
4816 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4817 bfd_putl32 (0xf2800000 | (insn
& 0x1f), contents
+ rel
->r_offset
);
4819 return bfd_reloc_continue
;
4822 return bfd_reloc_continue
;
4825 return bfd_reloc_ok
;
4828 /* Relocate an AArch64 ELF section. */
4831 elfNN_aarch64_relocate_section (bfd
*output_bfd
,
4832 struct bfd_link_info
*info
,
4834 asection
*input_section
,
4836 Elf_Internal_Rela
*relocs
,
4837 Elf_Internal_Sym
*local_syms
,
4838 asection
**local_sections
)
4840 Elf_Internal_Shdr
*symtab_hdr
;
4841 struct elf_link_hash_entry
**sym_hashes
;
4842 Elf_Internal_Rela
*rel
;
4843 Elf_Internal_Rela
*relend
;
4845 struct elf_aarch64_link_hash_table
*globals
;
4846 bfd_boolean save_addend
= FALSE
;
4849 globals
= elf_aarch64_hash_table (info
);
4851 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4852 sym_hashes
= elf_sym_hashes (input_bfd
);
4855 relend
= relocs
+ input_section
->reloc_count
;
4856 for (; rel
< relend
; rel
++)
4858 unsigned int r_type
;
4859 bfd_reloc_code_real_type bfd_r_type
;
4860 bfd_reloc_code_real_type relaxed_bfd_r_type
;
4861 reloc_howto_type
*howto
;
4862 unsigned long r_symndx
;
4863 Elf_Internal_Sym
*sym
;
4865 struct elf_link_hash_entry
*h
;
4867 bfd_reloc_status_type r
;
4870 bfd_boolean unresolved_reloc
= FALSE
;
4871 char *error_message
= NULL
;
4873 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
4874 r_type
= ELFNN_R_TYPE (rel
->r_info
);
4876 bfd_reloc
.howto
= elfNN_aarch64_howto_from_type (r_type
);
4877 howto
= bfd_reloc
.howto
;
4881 (*_bfd_error_handler
)
4882 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4883 input_bfd
, input_section
, r_type
);
4886 bfd_r_type
= elfNN_aarch64_bfd_reloc_from_howto (howto
);
4892 if (r_symndx
< symtab_hdr
->sh_info
)
4894 sym
= local_syms
+ r_symndx
;
4895 sym_type
= ELFNN_ST_TYPE (sym
->st_info
);
4896 sec
= local_sections
[r_symndx
];
4898 /* An object file might have a reference to a local
4899 undefined symbol. This is a daft object file, but we
4900 should at least do something about it. */
4901 if (r_type
!= R_AARCH64_NONE
&& r_type
!= R_AARCH64_NULL
4902 && bfd_is_und_section (sec
)
4903 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
4905 if (!info
->callbacks
->undefined_symbol
4906 (info
, bfd_elf_string_from_elf_section
4907 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
4908 input_bfd
, input_section
, rel
->r_offset
, TRUE
))
4912 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
4914 /* Relocate against local STT_GNU_IFUNC symbol. */
4915 if (!info
->relocatable
4916 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4918 h
= elfNN_aarch64_get_local_sym_hash (globals
, input_bfd
,
4923 /* Set STT_GNU_IFUNC symbol value. */
4924 h
->root
.u
.def
.value
= sym
->st_value
;
4925 h
->root
.u
.def
.section
= sec
;
4930 bfd_boolean warned
, ignored
;
4932 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4933 r_symndx
, symtab_hdr
, sym_hashes
,
4935 unresolved_reloc
, warned
, ignored
);
4940 if (sec
!= NULL
&& discarded_section (sec
))
4941 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4942 rel
, 1, relend
, howto
, 0, contents
);
4944 if (info
->relocatable
)
4948 name
= h
->root
.root
.string
;
4951 name
= (bfd_elf_string_from_elf_section
4952 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4953 if (name
== NULL
|| *name
== '\0')
4954 name
= bfd_section_name (input_bfd
, sec
);
4958 && r_type
!= R_AARCH64_NONE
4959 && r_type
!= R_AARCH64_NULL
4961 || h
->root
.type
== bfd_link_hash_defined
4962 || h
->root
.type
== bfd_link_hash_defweak
)
4963 && IS_AARCH64_TLS_RELOC (bfd_r_type
) != (sym_type
== STT_TLS
))
4965 (*_bfd_error_handler
)
4966 ((sym_type
== STT_TLS
4967 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4968 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4970 input_section
, (long) rel
->r_offset
, howto
->name
, name
);
4973 /* We relax only if we can see that there can be a valid transition
4974 from a reloc type to another.
4975 We call elfNN_aarch64_final_link_relocate unless we're completely
4976 done, i.e., the relaxation produced the final output we want. */
4978 relaxed_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
,
4980 if (relaxed_bfd_r_type
!= bfd_r_type
)
4982 bfd_r_type
= relaxed_bfd_r_type
;
4983 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
4984 BFD_ASSERT (howto
!= NULL
);
4985 r_type
= howto
->type
;
4986 r
= elfNN_aarch64_tls_relax (globals
, input_bfd
, contents
, rel
, h
);
4987 unresolved_reloc
= 0;
4990 r
= bfd_reloc_continue
;
4992 /* There may be multiple consecutive relocations for the
4993 same offset. In that case we are supposed to treat the
4994 output of each relocation as the addend for the next. */
4995 if (rel
+ 1 < relend
4996 && rel
->r_offset
== rel
[1].r_offset
4997 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NONE
4998 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NULL
)
5001 save_addend
= FALSE
;
5003 if (r
== bfd_reloc_continue
)
5004 r
= elfNN_aarch64_final_link_relocate (howto
, input_bfd
, output_bfd
,
5005 input_section
, contents
, rel
,
5006 relocation
, info
, sec
,
5007 h
, &unresolved_reloc
,
5008 save_addend
, &addend
, sym
);
5010 switch (elfNN_aarch64_bfd_reloc_from_type (r_type
))
5012 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5013 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5014 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5015 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5017 bfd_boolean need_relocs
= FALSE
;
5022 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5023 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
5026 (info
->shared
|| indx
!= 0) &&
5028 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5029 || h
->root
.type
!= bfd_link_hash_undefweak
);
5031 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
5035 Elf_Internal_Rela rela
;
5036 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPMOD
));
5038 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
5039 globals
->root
.sgot
->output_offset
+ off
;
5042 loc
= globals
->root
.srelgot
->contents
;
5043 loc
+= globals
->root
.srelgot
->reloc_count
++
5044 * RELOC_SIZE (htab
);
5045 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
5049 bfd_put_NN (output_bfd
,
5050 relocation
- dtpoff_base (info
),
5051 globals
->root
.sgot
->contents
+ off
5056 /* This TLS symbol is global. We emit a
5057 relocation to fixup the tls offset at load
5060 ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPREL
));
5063 (globals
->root
.sgot
->output_section
->vma
5064 + globals
->root
.sgot
->output_offset
+ off
5067 loc
= globals
->root
.srelgot
->contents
;
5068 loc
+= globals
->root
.srelgot
->reloc_count
++
5069 * RELOC_SIZE (globals
);
5070 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
5071 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
5072 globals
->root
.sgot
->contents
+ off
5078 bfd_put_NN (output_bfd
, (bfd_vma
) 1,
5079 globals
->root
.sgot
->contents
+ off
);
5080 bfd_put_NN (output_bfd
,
5081 relocation
- dtpoff_base (info
),
5082 globals
->root
.sgot
->contents
+ off
5086 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5090 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5091 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
5092 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5093 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5095 bfd_boolean need_relocs
= FALSE
;
5100 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5102 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
5105 (info
->shared
|| indx
!= 0) &&
5107 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5108 || h
->root
.type
!= bfd_link_hash_undefweak
);
5110 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
5114 Elf_Internal_Rela rela
;
5117 rela
.r_addend
= relocation
- dtpoff_base (info
);
5121 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_TPREL
));
5122 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
5123 globals
->root
.sgot
->output_offset
+ off
;
5125 loc
= globals
->root
.srelgot
->contents
;
5126 loc
+= globals
->root
.srelgot
->reloc_count
++
5127 * RELOC_SIZE (htab
);
5129 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
5131 bfd_put_NN (output_bfd
, rela
.r_addend
,
5132 globals
->root
.sgot
->contents
+ off
);
5135 bfd_put_NN (output_bfd
, relocation
- tpoff_base (info
),
5136 globals
->root
.sgot
->contents
+ off
);
5138 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5142 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
5143 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
5144 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5145 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
5146 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
5147 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
5148 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
5149 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
5152 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
5153 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5154 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5155 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
5156 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5157 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5159 bfd_boolean need_relocs
= FALSE
;
5160 int indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
5161 bfd_vma off
= symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
);
5163 need_relocs
= (h
== NULL
5164 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5165 || h
->root
.type
!= bfd_link_hash_undefweak
);
5167 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
5168 BFD_ASSERT (globals
->root
.sgot
!= NULL
);
5173 Elf_Internal_Rela rela
;
5174 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLSDESC
));
5177 rela
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
5178 + globals
->root
.sgotplt
->output_offset
5179 + off
+ globals
->sgotplt_jump_table_size
);
5182 rela
.r_addend
= relocation
- dtpoff_base (info
);
5184 /* Allocate the next available slot in the PLT reloc
5185 section to hold our R_AARCH64_TLSDESC, the next
5186 available slot is determined from reloc_count,
5187 which we step. But note, reloc_count was
5188 artifically moved down while allocating slots for
5189 real PLT relocs such that all of the PLT relocs
5190 will fit above the initial reloc_count and the
5191 extra stuff will fit below. */
5192 loc
= globals
->root
.srelplt
->contents
;
5193 loc
+= globals
->root
.srelplt
->reloc_count
++
5194 * RELOC_SIZE (globals
);
5196 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
5198 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
5199 globals
->root
.sgotplt
->contents
+ off
+
5200 globals
->sgotplt_jump_table_size
);
5201 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
5202 globals
->root
.sgotplt
->contents
+ off
+
5203 globals
->sgotplt_jump_table_size
+
5207 symbol_tlsdesc_got_offset_mark (input_bfd
, h
, r_symndx
);
5218 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5219 because such sections are not SEC_ALLOC and thus ld.so will
5220 not process them. */
5221 if (unresolved_reloc
5222 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5224 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5225 +rel
->r_offset
) != (bfd_vma
) - 1)
5227 (*_bfd_error_handler
)
5229 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5230 input_bfd
, input_section
, (long) rel
->r_offset
, howto
->name
,
5231 h
->root
.root
.string
);
5235 if (r
!= bfd_reloc_ok
&& r
!= bfd_reloc_continue
)
5239 case bfd_reloc_overflow
:
5240 /* If the overflowing reloc was to an undefined symbol,
5241 we have already printed one error message and there
5242 is no point complaining again. */
5244 h
->root
.type
!= bfd_link_hash_undefined
)
5245 && (!((*info
->callbacks
->reloc_overflow
)
5246 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5247 (bfd_vma
) 0, input_bfd
, input_section
,
5252 case bfd_reloc_undefined
:
5253 if (!((*info
->callbacks
->undefined_symbol
)
5254 (info
, name
, input_bfd
, input_section
,
5255 rel
->r_offset
, TRUE
)))
5259 case bfd_reloc_outofrange
:
5260 error_message
= _("out of range");
5263 case bfd_reloc_notsupported
:
5264 error_message
= _("unsupported relocation");
5267 case bfd_reloc_dangerous
:
5268 /* error_message should already be set. */
5272 error_message
= _("unknown error");
5276 BFD_ASSERT (error_message
!= NULL
);
5277 if (!((*info
->callbacks
->reloc_dangerous
)
5278 (info
, error_message
, input_bfd
, input_section
,
5289 /* Set the right machine number. */
5292 elfNN_aarch64_object_p (bfd
*abfd
)
5295 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64_ilp32
);
5297 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64
);
5302 /* Function to keep AArch64 specific flags in the ELF header. */
5305 elfNN_aarch64_set_private_flags (bfd
*abfd
, flagword flags
)
5307 if (elf_flags_init (abfd
) && elf_elfheader (abfd
)->e_flags
!= flags
)
5312 elf_elfheader (abfd
)->e_flags
= flags
;
5313 elf_flags_init (abfd
) = TRUE
;
5319 /* Merge backend specific data from an object file to the output
5320 object file when linking. */
5323 elfNN_aarch64_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5327 bfd_boolean flags_compatible
= TRUE
;
5330 /* Check if we have the same endianess. */
5331 if (!_bfd_generic_verify_endian_match (ibfd
, obfd
))
5334 if (!is_aarch64_elf (ibfd
) || !is_aarch64_elf (obfd
))
5337 /* The input BFD must have had its flags initialised. */
5338 /* The following seems bogus to me -- The flags are initialized in
5339 the assembler but I don't think an elf_flags_init field is
5340 written into the object. */
5341 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5343 in_flags
= elf_elfheader (ibfd
)->e_flags
;
5344 out_flags
= elf_elfheader (obfd
)->e_flags
;
5346 if (!elf_flags_init (obfd
))
5348 /* If the input is the default architecture and had the default
5349 flags then do not bother setting the flags for the output
5350 architecture, instead allow future merges to do this. If no
5351 future merges ever set these flags then they will retain their
5352 uninitialised values, which surprise surprise, correspond
5353 to the default values. */
5354 if (bfd_get_arch_info (ibfd
)->the_default
5355 && elf_elfheader (ibfd
)->e_flags
== 0)
5358 elf_flags_init (obfd
) = TRUE
;
5359 elf_elfheader (obfd
)->e_flags
= in_flags
;
5361 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
5362 && bfd_get_arch_info (obfd
)->the_default
)
5363 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
5364 bfd_get_mach (ibfd
));
5369 /* Identical flags must be compatible. */
5370 if (in_flags
== out_flags
)
5373 /* Check to see if the input BFD actually contains any sections. If
5374 not, its flags may not have been initialised either, but it
5375 cannot actually cause any incompatiblity. Do not short-circuit
5376 dynamic objects; their section list may be emptied by
5377 elf_link_add_object_symbols.
5379 Also check to see if there are no code sections in the input.
5380 In this case there is no need to check for code specific flags.
5381 XXX - do we need to worry about floating-point format compatability
5382 in data sections ? */
5383 if (!(ibfd
->flags
& DYNAMIC
))
5385 bfd_boolean null_input_bfd
= TRUE
;
5386 bfd_boolean only_data_sections
= TRUE
;
5388 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5390 if ((bfd_get_section_flags (ibfd
, sec
)
5391 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
5392 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
5393 only_data_sections
= FALSE
;
5395 null_input_bfd
= FALSE
;
5399 if (null_input_bfd
|| only_data_sections
)
5403 return flags_compatible
;
5406 /* Display the flags field. */
5409 elfNN_aarch64_print_private_bfd_data (bfd
*abfd
, void *ptr
)
5411 FILE *file
= (FILE *) ptr
;
5412 unsigned long flags
;
5414 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
5416 /* Print normal ELF private data. */
5417 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
5419 flags
= elf_elfheader (abfd
)->e_flags
;
5420 /* Ignore init flag - it may not be set, despite the flags field
5421 containing valid data. */
5423 /* xgettext:c-format */
5424 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
5427 fprintf (file
, _("<Unrecognised flag bits set>"));
5434 /* Update the got entry reference counts for the section being removed. */
5437 elfNN_aarch64_gc_sweep_hook (bfd
*abfd
,
5438 struct bfd_link_info
*info
,
5440 const Elf_Internal_Rela
* relocs
)
5442 struct elf_aarch64_link_hash_table
*htab
;
5443 Elf_Internal_Shdr
*symtab_hdr
;
5444 struct elf_link_hash_entry
**sym_hashes
;
5445 struct elf_aarch64_local_symbol
*locals
;
5446 const Elf_Internal_Rela
*rel
, *relend
;
5448 if (info
->relocatable
)
5451 htab
= elf_aarch64_hash_table (info
);
5456 elf_section_data (sec
)->local_dynrel
= NULL
;
5458 symtab_hdr
= &elf_symtab_hdr (abfd
);
5459 sym_hashes
= elf_sym_hashes (abfd
);
5461 locals
= elf_aarch64_locals (abfd
);
5463 relend
= relocs
+ sec
->reloc_count
;
5464 for (rel
= relocs
; rel
< relend
; rel
++)
5466 unsigned long r_symndx
;
5467 unsigned int r_type
;
5468 struct elf_link_hash_entry
*h
= NULL
;
5470 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
5472 if (r_symndx
>= symtab_hdr
->sh_info
)
5475 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
5476 while (h
->root
.type
== bfd_link_hash_indirect
5477 || h
->root
.type
== bfd_link_hash_warning
)
5478 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5482 Elf_Internal_Sym
*isym
;
5484 /* A local symbol. */
5485 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
5488 /* Check relocation against local STT_GNU_IFUNC symbol. */
5490 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
5492 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
5500 struct elf_aarch64_link_hash_entry
*eh
;
5501 struct elf_dyn_relocs
**pp
;
5502 struct elf_dyn_relocs
*p
;
5504 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
5506 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
5509 /* Everything must go for SEC. */
5515 r_type
= ELFNN_R_TYPE (rel
->r_info
);
5516 switch (aarch64_tls_transition (abfd
,info
, r_type
, h
,r_symndx
))
5518 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5519 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5520 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5521 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5522 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
5523 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5524 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5525 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
5526 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
5527 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5528 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5529 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5530 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5531 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5532 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
5533 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5534 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5535 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
5536 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
5537 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5538 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
5539 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
5540 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
5541 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
5542 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
5545 if (h
->got
.refcount
> 0)
5546 h
->got
.refcount
-= 1;
5548 if (h
->type
== STT_GNU_IFUNC
)
5550 if (h
->plt
.refcount
> 0)
5551 h
->plt
.refcount
-= 1;
5554 else if (locals
!= NULL
)
5556 if (locals
[r_symndx
].got_refcount
> 0)
5557 locals
[r_symndx
].got_refcount
-= 1;
5561 case BFD_RELOC_AARCH64_CALL26
:
5562 case BFD_RELOC_AARCH64_JUMP26
:
5563 /* If this is a local symbol then we resolve it
5564 directly without creating a PLT entry. */
5568 if (h
->plt
.refcount
> 0)
5569 h
->plt
.refcount
-= 1;
5572 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
5573 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
5574 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
5575 case BFD_RELOC_AARCH64_MOVW_G3
:
5576 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
5577 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5578 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
5579 case BFD_RELOC_AARCH64_NN
:
5580 if (h
!= NULL
&& info
->executable
)
5582 if (h
->plt
.refcount
> 0)
5583 h
->plt
.refcount
-= 1;
5595 /* Adjust a symbol defined by a dynamic object and referenced by a
5596 regular object. The current definition is in some section of the
5597 dynamic object, but we're not including those sections. We have to
5598 change the definition to something the rest of the link can
5602 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
5603 struct elf_link_hash_entry
*h
)
5605 struct elf_aarch64_link_hash_table
*htab
;
5608 /* If this is a function, put it in the procedure linkage table. We
5609 will fill in the contents of the procedure linkage table later,
5610 when we know the address of the .got section. */
5611 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
5613 if (h
->plt
.refcount
<= 0
5614 || (h
->type
!= STT_GNU_IFUNC
5615 && (SYMBOL_CALLS_LOCAL (info
, h
)
5616 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
5617 && h
->root
.type
== bfd_link_hash_undefweak
))))
5619 /* This case can occur if we saw a CALL26 reloc in
5620 an input file, but the symbol wasn't referred to
5621 by a dynamic object or all references were
5622 garbage collected. In which case we can end up
5624 h
->plt
.offset
= (bfd_vma
) - 1;
5631 /* It's possible that we incorrectly decided a .plt reloc was
5632 needed for an R_X86_64_PC32 reloc to a non-function sym in
5633 check_relocs. We can't decide accurately between function and
5634 non-function syms in check-relocs; Objects loaded later in
5635 the link may change h->type. So fix it now. */
5636 h
->plt
.offset
= (bfd_vma
) - 1;
5639 /* If this is a weak symbol, and there is a real definition, the
5640 processor independent code will have arranged for us to see the
5641 real definition first, and we can just use the same value. */
5642 if (h
->u
.weakdef
!= NULL
)
5644 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
5645 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
5646 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
5647 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
5648 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
5649 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
5653 /* If we are creating a shared library, we must presume that the
5654 only references to the symbol are via the global offset table.
5655 For such cases we need not do anything here; the relocations will
5656 be handled correctly by relocate_section. */
5660 /* If there are no references to this symbol that do not use the
5661 GOT, we don't need to generate a copy reloc. */
5662 if (!h
->non_got_ref
)
5665 /* If -z nocopyreloc was given, we won't generate them either. */
5666 if (info
->nocopyreloc
)
5672 /* We must allocate the symbol in our .dynbss section, which will
5673 become part of the .bss section of the executable. There will be
5674 an entry for this symbol in the .dynsym section. The dynamic
5675 object will contain position independent code, so all references
5676 from the dynamic object to this symbol will go through the global
5677 offset table. The dynamic linker will use the .dynsym entry to
5678 determine the address it must put in the global offset table, so
5679 both the dynamic object and the regular object will refer to the
5680 same memory location for the variable. */
5682 htab
= elf_aarch64_hash_table (info
);
5684 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
5685 to copy the initial value out of the dynamic object and into the
5686 runtime process image. */
5687 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
5689 htab
->srelbss
->size
+= RELOC_SIZE (htab
);
5695 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
5700 elfNN_aarch64_allocate_local_symbols (bfd
*abfd
, unsigned number
)
5702 struct elf_aarch64_local_symbol
*locals
;
5703 locals
= elf_aarch64_locals (abfd
);
5706 locals
= (struct elf_aarch64_local_symbol
*)
5707 bfd_zalloc (abfd
, number
* sizeof (struct elf_aarch64_local_symbol
));
5710 elf_aarch64_locals (abfd
) = locals
;
5715 /* Create the .got section to hold the global offset table. */
5718 aarch64_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
5720 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5723 struct elf_link_hash_entry
*h
;
5724 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5726 /* This function may be called more than once. */
5727 s
= bfd_get_linker_section (abfd
, ".got");
5731 flags
= bed
->dynamic_sec_flags
;
5733 s
= bfd_make_section_anyway_with_flags (abfd
,
5734 (bed
->rela_plts_and_copies_p
5735 ? ".rela.got" : ".rel.got"),
5736 (bed
->dynamic_sec_flags
5739 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
5743 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
5745 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
5748 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
5750 if (bed
->want_got_sym
)
5752 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
5753 (or .got.plt) section. We don't do this in the linker script
5754 because we don't want to define the symbol if we are not creating
5755 a global offset table. */
5756 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
5757 "_GLOBAL_OFFSET_TABLE_");
5758 elf_hash_table (info
)->hgot
= h
;
5763 if (bed
->want_got_plt
)
5765 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
5767 || !bfd_set_section_alignment (abfd
, s
,
5768 bed
->s
->log_file_align
))
5773 /* The first bit of the global offset table is the header. */
5774 s
->size
+= bed
->got_header_size
;
5779 /* Look through the relocs for a section during the first phase. */
5782 elfNN_aarch64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
5783 asection
*sec
, const Elf_Internal_Rela
*relocs
)
5785 Elf_Internal_Shdr
*symtab_hdr
;
5786 struct elf_link_hash_entry
**sym_hashes
;
5787 const Elf_Internal_Rela
*rel
;
5788 const Elf_Internal_Rela
*rel_end
;
5791 struct elf_aarch64_link_hash_table
*htab
;
5793 if (info
->relocatable
)
5796 BFD_ASSERT (is_aarch64_elf (abfd
));
5798 htab
= elf_aarch64_hash_table (info
);
5801 symtab_hdr
= &elf_symtab_hdr (abfd
);
5802 sym_hashes
= elf_sym_hashes (abfd
);
5804 rel_end
= relocs
+ sec
->reloc_count
;
5805 for (rel
= relocs
; rel
< rel_end
; rel
++)
5807 struct elf_link_hash_entry
*h
;
5808 unsigned long r_symndx
;
5809 unsigned int r_type
;
5810 bfd_reloc_code_real_type bfd_r_type
;
5811 Elf_Internal_Sym
*isym
;
5813 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
5814 r_type
= ELFNN_R_TYPE (rel
->r_info
);
5816 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
5818 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
5823 if (r_symndx
< symtab_hdr
->sh_info
)
5825 /* A local symbol. */
5826 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
5831 /* Check relocation against local STT_GNU_IFUNC symbol. */
5832 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
5834 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
,
5839 /* Fake a STT_GNU_IFUNC symbol. */
5840 h
->type
= STT_GNU_IFUNC
;
5843 h
->forced_local
= 1;
5844 h
->root
.type
= bfd_link_hash_defined
;
5851 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
5852 while (h
->root
.type
== bfd_link_hash_indirect
5853 || h
->root
.type
== bfd_link_hash_warning
)
5854 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5856 /* PR15323, ref flags aren't set for references in the same
5858 h
->root
.non_ir_ref
= 1;
5861 /* Could be done earlier, if h were already available. */
5862 bfd_r_type
= aarch64_tls_transition (abfd
, info
, r_type
, h
, r_symndx
);
5866 /* Create the ifunc sections for static executables. If we
5867 never see an indirect function symbol nor we are building
5868 a static executable, those sections will be empty and
5869 won't appear in output. */
5875 case BFD_RELOC_AARCH64_NN
:
5876 case BFD_RELOC_AARCH64_CALL26
:
5877 case BFD_RELOC_AARCH64_JUMP26
:
5878 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5879 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5880 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5881 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5882 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5883 case BFD_RELOC_AARCH64_ADD_LO12
:
5884 if (htab
->root
.dynobj
== NULL
)
5885 htab
->root
.dynobj
= abfd
;
5886 if (!_bfd_elf_create_ifunc_sections (htab
->root
.dynobj
, info
))
5891 /* It is referenced by a non-shared object. */
5893 h
->root
.non_ir_ref
= 1;
5898 case BFD_RELOC_AARCH64_NN
:
5900 /* We don't need to handle relocs into sections not going into
5901 the "real" output. */
5902 if ((sec
->flags
& SEC_ALLOC
) == 0)
5910 h
->plt
.refcount
+= 1;
5911 h
->pointer_equality_needed
= 1;
5914 /* No need to do anything if we're not creating a shared
5920 struct elf_dyn_relocs
*p
;
5921 struct elf_dyn_relocs
**head
;
5923 /* We must copy these reloc types into the output file.
5924 Create a reloc section in dynobj and make room for
5928 if (htab
->root
.dynobj
== NULL
)
5929 htab
->root
.dynobj
= abfd
;
5931 sreloc
= _bfd_elf_make_dynamic_reloc_section
5932 (sec
, htab
->root
.dynobj
, LOG_FILE_ALIGN
, abfd
, /*rela? */ TRUE
);
5938 /* If this is a global symbol, we count the number of
5939 relocations we need for this symbol. */
5942 struct elf_aarch64_link_hash_entry
*eh
;
5943 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
5944 head
= &eh
->dyn_relocs
;
5948 /* Track dynamic relocs needed for local syms too.
5949 We really need local syms available to do this
5955 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
5960 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5964 /* Beware of type punned pointers vs strict aliasing
5966 vpp
= &(elf_section_data (s
)->local_dynrel
);
5967 head
= (struct elf_dyn_relocs
**) vpp
;
5971 if (p
== NULL
|| p
->sec
!= sec
)
5973 bfd_size_type amt
= sizeof *p
;
5974 p
= ((struct elf_dyn_relocs
*)
5975 bfd_zalloc (htab
->root
.dynobj
, amt
));
5988 /* RR: We probably want to keep a consistency check that
5989 there are no dangling GOT_PAGE relocs. */
5990 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5991 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5992 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5993 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5994 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
5995 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5996 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5997 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
5998 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
5999 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6000 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6001 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6002 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6003 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6004 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
6005 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
6006 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6007 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
6008 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
6009 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
6010 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
6011 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
6012 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
6013 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
6014 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
6017 unsigned old_got_type
;
6019 got_type
= aarch64_reloc_got_type (bfd_r_type
);
6023 h
->got
.refcount
+= 1;
6024 old_got_type
= elf_aarch64_hash_entry (h
)->got_type
;
6028 struct elf_aarch64_local_symbol
*locals
;
6030 if (!elfNN_aarch64_allocate_local_symbols
6031 (abfd
, symtab_hdr
->sh_info
))
6034 locals
= elf_aarch64_locals (abfd
);
6035 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
6036 locals
[r_symndx
].got_refcount
+= 1;
6037 old_got_type
= locals
[r_symndx
].got_type
;
6040 /* If a variable is accessed with both general dynamic TLS
6041 methods, two slots may be created. */
6042 if (GOT_TLS_GD_ANY_P (old_got_type
) && GOT_TLS_GD_ANY_P (got_type
))
6043 got_type
|= old_got_type
;
6045 /* We will already have issued an error message if there
6046 is a TLS/non-TLS mismatch, based on the symbol type.
6047 So just combine any TLS types needed. */
6048 if (old_got_type
!= GOT_UNKNOWN
&& old_got_type
!= GOT_NORMAL
6049 && got_type
!= GOT_NORMAL
)
6050 got_type
|= old_got_type
;
6052 /* If the symbol is accessed by both IE and GD methods, we
6053 are able to relax. Turn off the GD flag, without
6054 messing up with any other kind of TLS types that may be
6056 if ((got_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (got_type
))
6057 got_type
&= ~ (GOT_TLSDESC_GD
| GOT_TLS_GD
);
6059 if (old_got_type
!= got_type
)
6062 elf_aarch64_hash_entry (h
)->got_type
= got_type
;
6065 struct elf_aarch64_local_symbol
*locals
;
6066 locals
= elf_aarch64_locals (abfd
);
6067 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
6068 locals
[r_symndx
].got_type
= got_type
;
6072 if (htab
->root
.dynobj
== NULL
)
6073 htab
->root
.dynobj
= abfd
;
6074 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
6079 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
6080 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
6081 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
6082 case BFD_RELOC_AARCH64_MOVW_G3
:
6085 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
6086 (*_bfd_error_handler
)
6087 (_("%B: relocation %s against `%s' can not be used when making "
6088 "a shared object; recompile with -fPIC"),
6089 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
6090 (h
) ? h
->root
.root
.string
: "a local symbol");
6091 bfd_set_error (bfd_error_bad_value
);
6095 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
6096 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
6097 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
6098 if (h
!= NULL
&& info
->executable
)
6100 /* If this reloc is in a read-only section, we might
6101 need a copy reloc. We can't check reliably at this
6102 stage whether the section is read-only, as input
6103 sections have not yet been mapped to output sections.
6104 Tentatively set the flag for now, and correct in
6105 adjust_dynamic_symbol. */
6107 h
->plt
.refcount
+= 1;
6108 h
->pointer_equality_needed
= 1;
6110 /* FIXME:: RR need to handle these in shared libraries
6111 and essentially bomb out as these being non-PIC
6112 relocations in shared libraries. */
6115 case BFD_RELOC_AARCH64_CALL26
:
6116 case BFD_RELOC_AARCH64_JUMP26
:
6117 /* If this is a local symbol then we resolve it
6118 directly without creating a PLT entry. */
6123 if (h
->plt
.refcount
<= 0)
6124 h
->plt
.refcount
= 1;
6126 h
->plt
.refcount
+= 1;
6137 /* Treat mapping symbols as special target symbols. */
6140 elfNN_aarch64_is_target_special_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
6143 return bfd_is_aarch64_special_symbol_name (sym
->name
,
6144 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
);
6147 /* This is a copy of elf_find_function () from elf.c except that
6148 AArch64 mapping symbols are ignored when looking for function names. */
6151 aarch64_elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6155 const char **filename_ptr
,
6156 const char **functionname_ptr
)
6158 const char *filename
= NULL
;
6159 asymbol
*func
= NULL
;
6160 bfd_vma low_func
= 0;
6163 for (p
= symbols
; *p
!= NULL
; p
++)
6167 q
= (elf_symbol_type
*) * p
;
6169 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6174 filename
= bfd_asymbol_name (&q
->symbol
);
6178 /* Skip mapping symbols. */
6179 if ((q
->symbol
.flags
& BSF_LOCAL
)
6180 && (bfd_is_aarch64_special_symbol_name
6181 (q
->symbol
.name
, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
)))
6184 if (bfd_get_section (&q
->symbol
) == section
6185 && q
->symbol
.value
>= low_func
&& q
->symbol
.value
<= offset
)
6187 func
= (asymbol
*) q
;
6188 low_func
= q
->symbol
.value
;
6198 *filename_ptr
= filename
;
6199 if (functionname_ptr
)
6200 *functionname_ptr
= bfd_asymbol_name (func
);
6206 /* Find the nearest line to a particular section and offset, for error
6207 reporting. This code is a duplicate of the code in elf.c, except
6208 that it uses aarch64_elf_find_function. */
6211 elfNN_aarch64_find_nearest_line (bfd
*abfd
,
6215 const char **filename_ptr
,
6216 const char **functionname_ptr
,
6217 unsigned int *line_ptr
,
6218 unsigned int *discriminator_ptr
)
6220 bfd_boolean found
= FALSE
;
6222 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
6223 filename_ptr
, functionname_ptr
,
6224 line_ptr
, discriminator_ptr
,
6225 dwarf_debug_sections
, 0,
6226 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6228 if (!*functionname_ptr
)
6229 aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
6230 *filename_ptr
? NULL
: filename_ptr
,
6236 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
6237 toolchain uses DWARF1. */
6239 if (!_bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6240 &found
, filename_ptr
,
6241 functionname_ptr
, line_ptr
,
6242 &elf_tdata (abfd
)->line_info
))
6245 if (found
&& (*functionname_ptr
|| *line_ptr
))
6248 if (symbols
== NULL
)
6251 if (!aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
6252 filename_ptr
, functionname_ptr
))
6260 elfNN_aarch64_find_inliner_info (bfd
*abfd
,
6261 const char **filename_ptr
,
6262 const char **functionname_ptr
,
6263 unsigned int *line_ptr
)
6266 found
= _bfd_dwarf2_find_inliner_info
6267 (abfd
, filename_ptr
,
6268 functionname_ptr
, line_ptr
, &elf_tdata (abfd
)->dwarf2_find_line_info
);
6274 elfNN_aarch64_post_process_headers (bfd
*abfd
,
6275 struct bfd_link_info
*link_info
)
6277 Elf_Internal_Ehdr
*i_ehdrp
; /* ELF file header, internal form. */
6279 i_ehdrp
= elf_elfheader (abfd
);
6280 i_ehdrp
->e_ident
[EI_ABIVERSION
] = AARCH64_ELF_ABI_VERSION
;
6282 _bfd_elf_post_process_headers (abfd
, link_info
);
6285 static enum elf_reloc_type_class
6286 elfNN_aarch64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
6287 const asection
*rel_sec ATTRIBUTE_UNUSED
,
6288 const Elf_Internal_Rela
*rela
)
6290 switch ((int) ELFNN_R_TYPE (rela
->r_info
))
6292 case AARCH64_R (RELATIVE
):
6293 return reloc_class_relative
;
6294 case AARCH64_R (JUMP_SLOT
):
6295 return reloc_class_plt
;
6296 case AARCH64_R (COPY
):
6297 return reloc_class_copy
;
6299 return reloc_class_normal
;
6303 /* Handle an AArch64 specific section when reading an object file. This is
6304 called when bfd_section_from_shdr finds a section with an unknown
6308 elfNN_aarch64_section_from_shdr (bfd
*abfd
,
6309 Elf_Internal_Shdr
*hdr
,
6310 const char *name
, int shindex
)
6312 /* There ought to be a place to keep ELF backend specific flags, but
6313 at the moment there isn't one. We just keep track of the
6314 sections by their name, instead. Fortunately, the ABI gives
6315 names for all the AArch64 specific sections, so we will probably get
6317 switch (hdr
->sh_type
)
6319 case SHT_AARCH64_ATTRIBUTES
:
6326 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
6332 /* A structure used to record a list of sections, independently
6333 of the next and prev fields in the asection structure. */
6334 typedef struct section_list
6337 struct section_list
*next
;
6338 struct section_list
*prev
;
6342 /* Unfortunately we need to keep a list of sections for which
6343 an _aarch64_elf_section_data structure has been allocated. This
6344 is because it is possible for functions like elfNN_aarch64_write_section
6345 to be called on a section which has had an elf_data_structure
6346 allocated for it (and so the used_by_bfd field is valid) but
6347 for which the AArch64 extended version of this structure - the
6348 _aarch64_elf_section_data structure - has not been allocated. */
6349 static section_list
*sections_with_aarch64_elf_section_data
= NULL
;
6352 record_section_with_aarch64_elf_section_data (asection
*sec
)
6354 struct section_list
*entry
;
6356 entry
= bfd_malloc (sizeof (*entry
));
6360 entry
->next
= sections_with_aarch64_elf_section_data
;
6362 if (entry
->next
!= NULL
)
6363 entry
->next
->prev
= entry
;
6364 sections_with_aarch64_elf_section_data
= entry
;
6367 static struct section_list
*
6368 find_aarch64_elf_section_entry (asection
*sec
)
6370 struct section_list
*entry
;
6371 static struct section_list
*last_entry
= NULL
;
6373 /* This is a short cut for the typical case where the sections are added
6374 to the sections_with_aarch64_elf_section_data list in forward order and
6375 then looked up here in backwards order. This makes a real difference
6376 to the ld-srec/sec64k.exp linker test. */
6377 entry
= sections_with_aarch64_elf_section_data
;
6378 if (last_entry
!= NULL
)
6380 if (last_entry
->sec
== sec
)
6382 else if (last_entry
->next
!= NULL
&& last_entry
->next
->sec
== sec
)
6383 entry
= last_entry
->next
;
6386 for (; entry
; entry
= entry
->next
)
6387 if (entry
->sec
== sec
)
6391 /* Record the entry prior to this one - it is the entry we are
6392 most likely to want to locate next time. Also this way if we
6393 have been called from
6394 unrecord_section_with_aarch64_elf_section_data () we will not
6395 be caching a pointer that is about to be freed. */
6396 last_entry
= entry
->prev
;
6402 unrecord_section_with_aarch64_elf_section_data (asection
*sec
)
6404 struct section_list
*entry
;
6406 entry
= find_aarch64_elf_section_entry (sec
);
6410 if (entry
->prev
!= NULL
)
6411 entry
->prev
->next
= entry
->next
;
6412 if (entry
->next
!= NULL
)
6413 entry
->next
->prev
= entry
->prev
;
6414 if (entry
== sections_with_aarch64_elf_section_data
)
6415 sections_with_aarch64_elf_section_data
= entry
->next
;
6424 struct bfd_link_info
*info
;
6427 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
6428 asection
*, struct elf_link_hash_entry
*);
6429 } output_arch_syminfo
;
6431 enum map_symbol_type
6438 /* Output a single mapping symbol. */
6441 elfNN_aarch64_output_map_sym (output_arch_syminfo
*osi
,
6442 enum map_symbol_type type
, bfd_vma offset
)
6444 static const char *names
[2] = { "$x", "$d" };
6445 Elf_Internal_Sym sym
;
6447 sym
.st_value
= (osi
->sec
->output_section
->vma
6448 + osi
->sec
->output_offset
+ offset
);
6451 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
6452 sym
.st_shndx
= osi
->sec_shndx
;
6453 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
6458 /* Output mapping symbols for PLT entries associated with H. */
6461 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
6463 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
6466 if (h
->root
.type
== bfd_link_hash_indirect
)
6469 if (h
->root
.type
== bfd_link_hash_warning
)
6470 /* When warning symbols are created, they **replace** the "real"
6471 entry in the hash table, thus we never get to see the real
6472 symbol in a hash traversal. So look at it now. */
6473 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6475 if (h
->plt
.offset
== (bfd_vma
) - 1)
6478 addr
= h
->plt
.offset
;
6481 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
6488 /* Output a single local symbol for a generated stub. */
6491 elfNN_aarch64_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
6492 bfd_vma offset
, bfd_vma size
)
6494 Elf_Internal_Sym sym
;
6496 sym
.st_value
= (osi
->sec
->output_section
->vma
6497 + osi
->sec
->output_offset
+ offset
);
6500 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
6501 sym
.st_shndx
= osi
->sec_shndx
;
6502 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
6506 aarch64_map_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
6508 struct elf_aarch64_stub_hash_entry
*stub_entry
;
6512 output_arch_syminfo
*osi
;
6514 /* Massage our args to the form they really have. */
6515 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
6516 osi
= (output_arch_syminfo
*) in_arg
;
6518 stub_sec
= stub_entry
->stub_sec
;
6520 /* Ensure this stub is attached to the current section being
6522 if (stub_sec
!= osi
->sec
)
6525 addr
= (bfd_vma
) stub_entry
->stub_offset
;
6527 stub_name
= stub_entry
->output_name
;
6529 switch (stub_entry
->stub_type
)
6531 case aarch64_stub_adrp_branch
:
6532 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
6533 sizeof (aarch64_adrp_branch_stub
)))
6535 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
6538 case aarch64_stub_long_branch
:
6539 if (!elfNN_aarch64_output_stub_sym
6540 (osi
, stub_name
, addr
, sizeof (aarch64_long_branch_stub
)))
6542 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
6544 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_DATA
, addr
+ 16))
6547 case aarch64_stub_erratum_835769_veneer
:
6548 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
6549 sizeof (aarch64_erratum_835769_stub
)))
6551 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
6561 /* Output mapping symbols for linker generated sections. */
6564 elfNN_aarch64_output_arch_local_syms (bfd
*output_bfd
,
6565 struct bfd_link_info
*info
,
6567 int (*func
) (void *, const char *,
6570 struct elf_link_hash_entry
6573 output_arch_syminfo osi
;
6574 struct elf_aarch64_link_hash_table
*htab
;
6576 htab
= elf_aarch64_hash_table (info
);
6582 /* Long calls stubs. */
6583 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
6587 for (stub_sec
= htab
->stub_bfd
->sections
;
6588 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
6590 /* Ignore non-stub sections. */
6591 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
6596 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
6597 (output_bfd
, osi
.sec
->output_section
);
6599 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_map_one_stub
,
6604 /* Finally, output mapping symbols for the PLT. */
6605 if (!htab
->root
.splt
|| htab
->root
.splt
->size
== 0)
6608 /* For now live without mapping symbols for the plt. */
6609 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
6610 (output_bfd
, htab
->root
.splt
->output_section
);
6611 osi
.sec
= htab
->root
.splt
;
6613 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_output_plt_map
,
6620 /* Allocate target specific section data. */
6623 elfNN_aarch64_new_section_hook (bfd
*abfd
, asection
*sec
)
6625 if (!sec
->used_by_bfd
)
6627 _aarch64_elf_section_data
*sdata
;
6628 bfd_size_type amt
= sizeof (*sdata
);
6630 sdata
= bfd_zalloc (abfd
, amt
);
6633 sec
->used_by_bfd
= sdata
;
6636 record_section_with_aarch64_elf_section_data (sec
);
6638 return _bfd_elf_new_section_hook (abfd
, sec
);
6643 unrecord_section_via_map_over_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
6645 void *ignore ATTRIBUTE_UNUSED
)
6647 unrecord_section_with_aarch64_elf_section_data (sec
);
6651 elfNN_aarch64_close_and_cleanup (bfd
*abfd
)
6654 bfd_map_over_sections (abfd
,
6655 unrecord_section_via_map_over_sections
, NULL
);
6657 return _bfd_elf_close_and_cleanup (abfd
);
6661 elfNN_aarch64_bfd_free_cached_info (bfd
*abfd
)
6664 bfd_map_over_sections (abfd
,
6665 unrecord_section_via_map_over_sections
, NULL
);
6667 return _bfd_free_cached_info (abfd
);
6670 /* Create dynamic sections. This is different from the ARM backend in that
6671 the got, plt, gotplt and their relocation sections are all created in the
6672 standard part of the bfd elf backend. */
6675 elfNN_aarch64_create_dynamic_sections (bfd
*dynobj
,
6676 struct bfd_link_info
*info
)
6678 struct elf_aarch64_link_hash_table
*htab
;
6680 /* We need to create .got section. */
6681 if (!aarch64_elf_create_got_section (dynobj
, info
))
6684 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
6687 htab
= elf_aarch64_hash_table (info
);
6688 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
6690 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
6692 if (!htab
->sdynbss
|| (!info
->shared
&& !htab
->srelbss
))
6699 /* Allocate space in .plt, .got and associated reloc sections for
6703 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
6705 struct bfd_link_info
*info
;
6706 struct elf_aarch64_link_hash_table
*htab
;
6707 struct elf_aarch64_link_hash_entry
*eh
;
6708 struct elf_dyn_relocs
*p
;
6710 /* An example of a bfd_link_hash_indirect symbol is versioned
6711 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6712 -> __gxx_personality_v0(bfd_link_hash_defined)
6714 There is no need to process bfd_link_hash_indirect symbols here
6715 because we will also be presented with the concrete instance of
6716 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6717 called to copy all relevant data from the generic to the concrete
6720 if (h
->root
.type
== bfd_link_hash_indirect
)
6723 if (h
->root
.type
== bfd_link_hash_warning
)
6724 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6726 info
= (struct bfd_link_info
*) inf
;
6727 htab
= elf_aarch64_hash_table (info
);
6729 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6730 here if it is defined and referenced in a non-shared object. */
6731 if (h
->type
== STT_GNU_IFUNC
6734 else if (htab
->root
.dynamic_sections_created
&& h
->plt
.refcount
> 0)
6736 /* Make sure this symbol is output as a dynamic symbol.
6737 Undefined weak syms won't yet be marked as dynamic. */
6738 if (h
->dynindx
== -1 && !h
->forced_local
)
6740 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
6744 if (info
->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
6746 asection
*s
= htab
->root
.splt
;
6748 /* If this is the first .plt entry, make room for the special
6751 s
->size
+= htab
->plt_header_size
;
6753 h
->plt
.offset
= s
->size
;
6755 /* If this symbol is not defined in a regular file, and we are
6756 not generating a shared library, then set the symbol to this
6757 location in the .plt. This is required to make function
6758 pointers compare as equal between the normal executable and
6759 the shared library. */
6760 if (!info
->shared
&& !h
->def_regular
)
6762 h
->root
.u
.def
.section
= s
;
6763 h
->root
.u
.def
.value
= h
->plt
.offset
;
6766 /* Make room for this entry. For now we only create the
6767 small model PLT entries. We later need to find a way
6768 of relaxing into these from the large model PLT entries. */
6769 s
->size
+= PLT_SMALL_ENTRY_SIZE
;
6771 /* We also need to make an entry in the .got.plt section, which
6772 will be placed in the .got section by the linker script. */
6773 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
6775 /* We also need to make an entry in the .rela.plt section. */
6776 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
6778 /* We need to ensure that all GOT entries that serve the PLT
6779 are consecutive with the special GOT slots [0] [1] and
6780 [2]. Any addtional relocations, such as
6781 R_AARCH64_TLSDESC, must be placed after the PLT related
6782 entries. We abuse the reloc_count such that during
6783 sizing we adjust reloc_count to indicate the number of
6784 PLT related reserved entries. In subsequent phases when
6785 filling in the contents of the reloc entries, PLT related
6786 entries are placed by computing their PLT index (0
6787 .. reloc_count). While other none PLT relocs are placed
6788 at the slot indicated by reloc_count and reloc_count is
6791 htab
->root
.srelplt
->reloc_count
++;
6795 h
->plt
.offset
= (bfd_vma
) - 1;
6801 h
->plt
.offset
= (bfd_vma
) - 1;
6805 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
6806 eh
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
6808 if (h
->got
.refcount
> 0)
6811 unsigned got_type
= elf_aarch64_hash_entry (h
)->got_type
;
6813 h
->got
.offset
= (bfd_vma
) - 1;
6815 dyn
= htab
->root
.dynamic_sections_created
;
6817 /* Make sure this symbol is output as a dynamic symbol.
6818 Undefined weak syms won't yet be marked as dynamic. */
6819 if (dyn
&& h
->dynindx
== -1 && !h
->forced_local
)
6821 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
6825 if (got_type
== GOT_UNKNOWN
)
6828 else if (got_type
== GOT_NORMAL
)
6830 h
->got
.offset
= htab
->root
.sgot
->size
;
6831 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
6832 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6833 || h
->root
.type
!= bfd_link_hash_undefweak
)
6835 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
6837 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
6843 if (got_type
& GOT_TLSDESC_GD
)
6845 eh
->tlsdesc_got_jump_table_offset
=
6846 (htab
->root
.sgotplt
->size
6847 - aarch64_compute_jump_table_size (htab
));
6848 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
6849 h
->got
.offset
= (bfd_vma
) - 2;
6852 if (got_type
& GOT_TLS_GD
)
6854 h
->got
.offset
= htab
->root
.sgot
->size
;
6855 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
6858 if (got_type
& GOT_TLS_IE
)
6860 h
->got
.offset
= htab
->root
.sgot
->size
;
6861 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
6864 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6865 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6866 || h
->root
.type
!= bfd_link_hash_undefweak
)
6869 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
6871 if (got_type
& GOT_TLSDESC_GD
)
6873 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
6874 /* Note reloc_count not incremented here! We have
6875 already adjusted reloc_count for this relocation
6878 /* TLSDESC PLT is now needed, but not yet determined. */
6879 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
6882 if (got_type
& GOT_TLS_GD
)
6883 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
6885 if (got_type
& GOT_TLS_IE
)
6886 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
6892 h
->got
.offset
= (bfd_vma
) - 1;
6895 if (eh
->dyn_relocs
== NULL
)
6898 /* In the shared -Bsymbolic case, discard space allocated for
6899 dynamic pc-relative relocs against symbols which turn out to be
6900 defined in regular objects. For the normal shared case, discard
6901 space for pc-relative relocs that have become local due to symbol
6902 visibility changes. */
6906 /* Relocs that use pc_count are those that appear on a call
6907 insn, or certain REL relocs that can generated via assembly.
6908 We want calls to protected symbols to resolve directly to the
6909 function rather than going via the plt. If people want
6910 function pointer comparisons to work as expected then they
6911 should avoid writing weird assembly. */
6912 if (SYMBOL_CALLS_LOCAL (info
, h
))
6914 struct elf_dyn_relocs
**pp
;
6916 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
;)
6918 p
->count
-= p
->pc_count
;
6927 /* Also discard relocs on undefined weak syms with non-default
6929 if (eh
->dyn_relocs
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
6931 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
6932 eh
->dyn_relocs
= NULL
;
6934 /* Make sure undefined weak symbols are output as a dynamic
6936 else if (h
->dynindx
== -1
6938 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
6943 else if (ELIMINATE_COPY_RELOCS
)
6945 /* For the non-shared case, discard space for relocs against
6946 symbols which turn out to need copy relocs or are not
6952 || (htab
->root
.dynamic_sections_created
6953 && (h
->root
.type
== bfd_link_hash_undefweak
6954 || h
->root
.type
== bfd_link_hash_undefined
))))
6956 /* Make sure this symbol is output as a dynamic symbol.
6957 Undefined weak syms won't yet be marked as dynamic. */
6958 if (h
->dynindx
== -1
6960 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
6963 /* If that succeeded, we know we'll be keeping all the
6965 if (h
->dynindx
!= -1)
6969 eh
->dyn_relocs
= NULL
;
6974 /* Finally, allocate space. */
6975 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
6979 sreloc
= elf_section_data (p
->sec
)->sreloc
;
6981 BFD_ASSERT (sreloc
!= NULL
);
6983 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
6989 /* Allocate space in .plt, .got and associated reloc sections for
6990 ifunc dynamic relocs. */
6993 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
6996 struct bfd_link_info
*info
;
6997 struct elf_aarch64_link_hash_table
*htab
;
6998 struct elf_aarch64_link_hash_entry
*eh
;
7000 /* An example of a bfd_link_hash_indirect symbol is versioned
7001 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7002 -> __gxx_personality_v0(bfd_link_hash_defined)
7004 There is no need to process bfd_link_hash_indirect symbols here
7005 because we will also be presented with the concrete instance of
7006 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7007 called to copy all relevant data from the generic to the concrete
7010 if (h
->root
.type
== bfd_link_hash_indirect
)
7013 if (h
->root
.type
== bfd_link_hash_warning
)
7014 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7016 info
= (struct bfd_link_info
*) inf
;
7017 htab
= elf_aarch64_hash_table (info
);
7019 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
7021 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7022 here if it is defined and referenced in a non-shared object. */
7023 if (h
->type
== STT_GNU_IFUNC
7025 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
7027 htab
->plt_entry_size
,
7028 htab
->plt_header_size
,
7033 /* Allocate space in .plt, .got and associated reloc sections for
7034 local dynamic relocs. */
7037 elfNN_aarch64_allocate_local_dynrelocs (void **slot
, void *inf
)
7039 struct elf_link_hash_entry
*h
7040 = (struct elf_link_hash_entry
*) *slot
;
7042 if (h
->type
!= STT_GNU_IFUNC
7046 || h
->root
.type
!= bfd_link_hash_defined
)
7049 return elfNN_aarch64_allocate_dynrelocs (h
, inf
);
7052 /* Allocate space in .plt, .got and associated reloc sections for
7053 local ifunc dynamic relocs. */
7056 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
7058 struct elf_link_hash_entry
*h
7059 = (struct elf_link_hash_entry
*) *slot
;
7061 if (h
->type
!= STT_GNU_IFUNC
7065 || h
->root
.type
!= bfd_link_hash_defined
)
7068 return elfNN_aarch64_allocate_ifunc_dynrelocs (h
, inf
);
7071 /* This is the most important function of all . Innocuosly named
7074 elfNN_aarch64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
7075 struct bfd_link_info
*info
)
7077 struct elf_aarch64_link_hash_table
*htab
;
7083 htab
= elf_aarch64_hash_table ((info
));
7084 dynobj
= htab
->root
.dynobj
;
7086 BFD_ASSERT (dynobj
!= NULL
);
7088 if (htab
->root
.dynamic_sections_created
)
7090 if (info
->executable
)
7092 s
= bfd_get_linker_section (dynobj
, ".interp");
7095 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
7096 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
7100 /* Set up .got offsets for local syms, and space for local dynamic
7102 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
7104 struct elf_aarch64_local_symbol
*locals
= NULL
;
7105 Elf_Internal_Shdr
*symtab_hdr
;
7109 if (!is_aarch64_elf (ibfd
))
7112 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
7114 struct elf_dyn_relocs
*p
;
7116 for (p
= (struct elf_dyn_relocs
*)
7117 (elf_section_data (s
)->local_dynrel
); p
!= NULL
; p
= p
->next
)
7119 if (!bfd_is_abs_section (p
->sec
)
7120 && bfd_is_abs_section (p
->sec
->output_section
))
7122 /* Input section has been discarded, either because
7123 it is a copy of a linkonce section or due to
7124 linker script /DISCARD/, so we'll be discarding
7127 else if (p
->count
!= 0)
7129 srel
= elf_section_data (p
->sec
)->sreloc
;
7130 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
7131 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
7132 info
->flags
|= DF_TEXTREL
;
7137 locals
= elf_aarch64_locals (ibfd
);
7141 symtab_hdr
= &elf_symtab_hdr (ibfd
);
7142 srel
= htab
->root
.srelgot
;
7143 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
7145 locals
[i
].got_offset
= (bfd_vma
) - 1;
7146 locals
[i
].tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
7147 if (locals
[i
].got_refcount
> 0)
7149 unsigned got_type
= locals
[i
].got_type
;
7150 if (got_type
& GOT_TLSDESC_GD
)
7152 locals
[i
].tlsdesc_got_jump_table_offset
=
7153 (htab
->root
.sgotplt
->size
7154 - aarch64_compute_jump_table_size (htab
));
7155 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
7156 locals
[i
].got_offset
= (bfd_vma
) - 2;
7159 if (got_type
& GOT_TLS_GD
)
7161 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
7162 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
7165 if (got_type
& GOT_TLS_IE
)
7167 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
7168 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
7171 if (got_type
== GOT_UNKNOWN
)
7175 if (got_type
== GOT_NORMAL
)
7181 if (got_type
& GOT_TLSDESC_GD
)
7183 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
7184 /* Note RELOC_COUNT not incremented here! */
7185 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
7188 if (got_type
& GOT_TLS_GD
)
7189 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
7191 if (got_type
& GOT_TLS_IE
)
7192 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
7197 locals
[i
].got_refcount
= (bfd_vma
) - 1;
7203 /* Allocate global sym .plt and .got entries, and space for global
7204 sym dynamic relocs. */
7205 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_dynrelocs
,
7208 /* Allocate global ifunc sym .plt and .got entries, and space for global
7209 ifunc sym dynamic relocs. */
7210 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_ifunc_dynrelocs
,
7213 /* Allocate .plt and .got entries, and space for local symbols. */
7214 htab_traverse (htab
->loc_hash_table
,
7215 elfNN_aarch64_allocate_local_dynrelocs
,
7218 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
7219 htab_traverse (htab
->loc_hash_table
,
7220 elfNN_aarch64_allocate_local_ifunc_dynrelocs
,
7223 /* For every jump slot reserved in the sgotplt, reloc_count is
7224 incremented. However, when we reserve space for TLS descriptors,
7225 it's not incremented, so in order to compute the space reserved
7226 for them, it suffices to multiply the reloc count by the jump
7229 if (htab
->root
.srelplt
)
7230 htab
->sgotplt_jump_table_size
= aarch64_compute_jump_table_size (htab
);
7232 if (htab
->tlsdesc_plt
)
7234 if (htab
->root
.splt
->size
== 0)
7235 htab
->root
.splt
->size
+= PLT_ENTRY_SIZE
;
7237 htab
->tlsdesc_plt
= htab
->root
.splt
->size
;
7238 htab
->root
.splt
->size
+= PLT_TLSDESC_ENTRY_SIZE
;
7240 /* If we're not using lazy TLS relocations, don't generate the
7241 GOT entry required. */
7242 if (!(info
->flags
& DF_BIND_NOW
))
7244 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
7245 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
7249 /* Init mapping symbols information to use later to distingush between
7250 code and data while scanning for erratam 835769. */
7251 if (htab
->fix_erratum_835769
)
7252 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
7254 if (!is_aarch64_elf (ibfd
))
7256 bfd_elfNN_aarch64_init_maps (ibfd
);
7259 /* We now have determined the sizes of the various dynamic sections.
7260 Allocate memory for them. */
7262 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
7264 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
7267 if (s
== htab
->root
.splt
7268 || s
== htab
->root
.sgot
7269 || s
== htab
->root
.sgotplt
7270 || s
== htab
->root
.iplt
7271 || s
== htab
->root
.igotplt
|| s
== htab
->sdynbss
)
7273 /* Strip this section if we don't need it; see the
7276 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
7278 if (s
->size
!= 0 && s
!= htab
->root
.srelplt
)
7281 /* We use the reloc_count field as a counter if we need
7282 to copy relocs into the output file. */
7283 if (s
!= htab
->root
.srelplt
)
7288 /* It's not one of our sections, so don't allocate space. */
7294 /* If we don't need this section, strip it from the
7295 output file. This is mostly to handle .rela.bss and
7296 .rela.plt. We must create both sections in
7297 create_dynamic_sections, because they must be created
7298 before the linker maps input sections to output
7299 sections. The linker does that before
7300 adjust_dynamic_symbol is called, and it is that
7301 function which decides whether anything needs to go
7302 into these sections. */
7304 s
->flags
|= SEC_EXCLUDE
;
7308 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
7311 /* Allocate memory for the section contents. We use bfd_zalloc
7312 here in case unused entries are not reclaimed before the
7313 section's contents are written out. This should not happen,
7314 but this way if it does, we get a R_AARCH64_NONE reloc instead
7316 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
7317 if (s
->contents
== NULL
)
7321 if (htab
->root
.dynamic_sections_created
)
7323 /* Add some entries to the .dynamic section. We fill in the
7324 values later, in elfNN_aarch64_finish_dynamic_sections, but we
7325 must add the entries now so that we get the correct size for
7326 the .dynamic section. The DT_DEBUG entry is filled in by the
7327 dynamic linker and used by the debugger. */
7328 #define add_dynamic_entry(TAG, VAL) \
7329 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7331 if (info
->executable
)
7333 if (!add_dynamic_entry (DT_DEBUG
, 0))
7337 if (htab
->root
.splt
->size
!= 0)
7339 if (!add_dynamic_entry (DT_PLTGOT
, 0)
7340 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
7341 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
7342 || !add_dynamic_entry (DT_JMPREL
, 0))
7345 if (htab
->tlsdesc_plt
7346 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
7347 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
7353 if (!add_dynamic_entry (DT_RELA
, 0)
7354 || !add_dynamic_entry (DT_RELASZ
, 0)
7355 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
7358 /* If any dynamic relocs apply to a read-only section,
7359 then we need a DT_TEXTREL entry. */
7360 if ((info
->flags
& DF_TEXTREL
) != 0)
7362 if (!add_dynamic_entry (DT_TEXTREL
, 0))
7367 #undef add_dynamic_entry
7373 elf_aarch64_update_plt_entry (bfd
*output_bfd
,
7374 bfd_reloc_code_real_type r_type
,
7375 bfd_byte
*plt_entry
, bfd_vma value
)
7377 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (r_type
);
7379 _bfd_aarch64_elf_put_addend (output_bfd
, plt_entry
, r_type
, howto
, value
);
7383 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry
*h
,
7384 struct elf_aarch64_link_hash_table
7385 *htab
, bfd
*output_bfd
,
7386 struct bfd_link_info
*info
)
7388 bfd_byte
*plt_entry
;
7391 bfd_vma gotplt_entry_address
;
7392 bfd_vma plt_entry_address
;
7393 Elf_Internal_Rela rela
;
7395 asection
*plt
, *gotplt
, *relplt
;
7397 /* When building a static executable, use .iplt, .igot.plt and
7398 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7399 if (htab
->root
.splt
!= NULL
)
7401 plt
= htab
->root
.splt
;
7402 gotplt
= htab
->root
.sgotplt
;
7403 relplt
= htab
->root
.srelplt
;
7407 plt
= htab
->root
.iplt
;
7408 gotplt
= htab
->root
.igotplt
;
7409 relplt
= htab
->root
.irelplt
;
7412 /* Get the index in the procedure linkage table which
7413 corresponds to this symbol. This is the index of this symbol
7414 in all the symbols for which we are making plt entries. The
7415 first entry in the procedure linkage table is reserved.
7417 Get the offset into the .got table of the entry that
7418 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
7419 bytes. The first three are reserved for the dynamic linker.
7421 For static executables, we don't reserve anything. */
7423 if (plt
== htab
->root
.splt
)
7425 plt_index
= (h
->plt
.offset
- htab
->plt_header_size
) / htab
->plt_entry_size
;
7426 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
7430 plt_index
= h
->plt
.offset
/ htab
->plt_entry_size
;
7431 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
7434 plt_entry
= plt
->contents
+ h
->plt
.offset
;
7435 plt_entry_address
= plt
->output_section
->vma
7436 + plt
->output_offset
+ h
->plt
.offset
;
7437 gotplt_entry_address
= gotplt
->output_section
->vma
+
7438 gotplt
->output_offset
+ got_offset
;
7440 /* Copy in the boiler-plate for the PLTn entry. */
7441 memcpy (plt_entry
, elfNN_aarch64_small_plt_entry
, PLT_SMALL_ENTRY_SIZE
);
7443 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7444 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7445 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
7447 PG (gotplt_entry_address
) -
7448 PG (plt_entry_address
));
7450 /* Fill in the lo12 bits for the load from the pltgot. */
7451 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
7453 PG_OFFSET (gotplt_entry_address
));
7455 /* Fill in the lo12 bits for the add from the pltgot entry. */
7456 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
7458 PG_OFFSET (gotplt_entry_address
));
7460 /* All the GOTPLT Entries are essentially initialized to PLT0. */
7461 bfd_put_NN (output_bfd
,
7462 plt
->output_section
->vma
+ plt
->output_offset
,
7463 gotplt
->contents
+ got_offset
);
7465 rela
.r_offset
= gotplt_entry_address
;
7467 if (h
->dynindx
== -1
7468 || ((info
->executable
7469 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
7471 && h
->type
== STT_GNU_IFUNC
))
7473 /* If an STT_GNU_IFUNC symbol is locally defined, generate
7474 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
7475 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
7476 rela
.r_addend
= (h
->root
.u
.def
.value
7477 + h
->root
.u
.def
.section
->output_section
->vma
7478 + h
->root
.u
.def
.section
->output_offset
);
7482 /* Fill in the entry in the .rela.plt section. */
7483 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (JUMP_SLOT
));
7487 /* Compute the relocation entry to used based on PLT index and do
7488 not adjust reloc_count. The reloc_count has already been adjusted
7489 to account for this entry. */
7490 loc
= relplt
->contents
+ plt_index
* RELOC_SIZE (htab
);
7491 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7494 /* Size sections even though they're not dynamic. We use it to setup
7495 _TLS_MODULE_BASE_, if needed. */
7498 elfNN_aarch64_always_size_sections (bfd
*output_bfd
,
7499 struct bfd_link_info
*info
)
7503 if (info
->relocatable
)
7506 tls_sec
= elf_hash_table (info
)->tls_sec
;
7510 struct elf_link_hash_entry
*tlsbase
;
7512 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
7513 "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
7517 struct bfd_link_hash_entry
*h
= NULL
;
7518 const struct elf_backend_data
*bed
=
7519 get_elf_backend_data (output_bfd
);
7521 if (!(_bfd_generic_link_add_one_symbol
7522 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
7523 tls_sec
, 0, NULL
, FALSE
, bed
->collect
, &h
)))
7526 tlsbase
->type
= STT_TLS
;
7527 tlsbase
= (struct elf_link_hash_entry
*) h
;
7528 tlsbase
->def_regular
= 1;
7529 tlsbase
->other
= STV_HIDDEN
;
7530 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
7537 /* Finish up dynamic symbol handling. We set the contents of various
7538 dynamic sections here. */
7540 elfNN_aarch64_finish_dynamic_symbol (bfd
*output_bfd
,
7541 struct bfd_link_info
*info
,
7542 struct elf_link_hash_entry
*h
,
7543 Elf_Internal_Sym
*sym
)
7545 struct elf_aarch64_link_hash_table
*htab
;
7546 htab
= elf_aarch64_hash_table (info
);
7548 if (h
->plt
.offset
!= (bfd_vma
) - 1)
7550 asection
*plt
, *gotplt
, *relplt
;
7552 /* This symbol has an entry in the procedure linkage table. Set
7555 /* When building a static executable, use .iplt, .igot.plt and
7556 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7557 if (htab
->root
.splt
!= NULL
)
7559 plt
= htab
->root
.splt
;
7560 gotplt
= htab
->root
.sgotplt
;
7561 relplt
= htab
->root
.srelplt
;
7565 plt
= htab
->root
.iplt
;
7566 gotplt
= htab
->root
.igotplt
;
7567 relplt
= htab
->root
.irelplt
;
7570 /* This symbol has an entry in the procedure linkage table. Set
7572 if ((h
->dynindx
== -1
7573 && !((h
->forced_local
|| info
->executable
)
7575 && h
->type
== STT_GNU_IFUNC
))
7581 elfNN_aarch64_create_small_pltn_entry (h
, htab
, output_bfd
, info
);
7582 if (!h
->def_regular
)
7584 /* Mark the symbol as undefined, rather than as defined in
7585 the .plt section. */
7586 sym
->st_shndx
= SHN_UNDEF
;
7587 /* If the symbol is weak we need to clear the value.
7588 Otherwise, the PLT entry would provide a definition for
7589 the symbol even if the symbol wasn't defined anywhere,
7590 and so the symbol would never be NULL. Leave the value if
7591 there were any relocations where pointer equality matters
7592 (this is a clue for the dynamic linker, to make function
7593 pointer comparisons work between an application and shared
7595 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
7600 if (h
->got
.offset
!= (bfd_vma
) - 1
7601 && elf_aarch64_hash_entry (h
)->got_type
== GOT_NORMAL
)
7603 Elf_Internal_Rela rela
;
7606 /* This symbol has an entry in the global offset table. Set it
7608 if (htab
->root
.sgot
== NULL
|| htab
->root
.srelgot
== NULL
)
7611 rela
.r_offset
= (htab
->root
.sgot
->output_section
->vma
7612 + htab
->root
.sgot
->output_offset
7613 + (h
->got
.offset
& ~(bfd_vma
) 1));
7616 && h
->type
== STT_GNU_IFUNC
)
7620 /* Generate R_AARCH64_GLOB_DAT. */
7627 if (!h
->pointer_equality_needed
)
7630 /* For non-shared object, we can't use .got.plt, which
7631 contains the real function address if we need pointer
7632 equality. We load the GOT entry with the PLT entry. */
7633 plt
= htab
->root
.splt
? htab
->root
.splt
: htab
->root
.iplt
;
7634 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
7635 + plt
->output_offset
7637 htab
->root
.sgot
->contents
7638 + (h
->got
.offset
& ~(bfd_vma
) 1));
7642 else if (info
->shared
&& SYMBOL_REFERENCES_LOCAL (info
, h
))
7644 if (!h
->def_regular
)
7647 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
7648 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
7649 rela
.r_addend
= (h
->root
.u
.def
.value
7650 + h
->root
.u
.def
.section
->output_section
->vma
7651 + h
->root
.u
.def
.section
->output_offset
);
7656 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
7657 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
7658 htab
->root
.sgot
->contents
+ h
->got
.offset
);
7659 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (GLOB_DAT
));
7663 loc
= htab
->root
.srelgot
->contents
;
7664 loc
+= htab
->root
.srelgot
->reloc_count
++ * RELOC_SIZE (htab
);
7665 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7670 Elf_Internal_Rela rela
;
7673 /* This symbol needs a copy reloc. Set it up. */
7675 if (h
->dynindx
== -1
7676 || (h
->root
.type
!= bfd_link_hash_defined
7677 && h
->root
.type
!= bfd_link_hash_defweak
)
7678 || htab
->srelbss
== NULL
)
7681 rela
.r_offset
= (h
->root
.u
.def
.value
7682 + h
->root
.u
.def
.section
->output_section
->vma
7683 + h
->root
.u
.def
.section
->output_offset
);
7684 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (COPY
));
7686 loc
= htab
->srelbss
->contents
;
7687 loc
+= htab
->srelbss
->reloc_count
++ * RELOC_SIZE (htab
);
7688 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7691 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
7692 be NULL for local symbols. */
7694 && (h
== elf_hash_table (info
)->hdynamic
7695 || h
== elf_hash_table (info
)->hgot
))
7696 sym
->st_shndx
= SHN_ABS
;
7701 /* Finish up local dynamic symbol handling. We set the contents of
7702 various dynamic sections here. */
7705 elfNN_aarch64_finish_local_dynamic_symbol (void **slot
, void *inf
)
7707 struct elf_link_hash_entry
*h
7708 = (struct elf_link_hash_entry
*) *slot
;
7709 struct bfd_link_info
*info
7710 = (struct bfd_link_info
*) inf
;
7712 return elfNN_aarch64_finish_dynamic_symbol (info
->output_bfd
,
7717 elfNN_aarch64_init_small_plt0_entry (bfd
*output_bfd ATTRIBUTE_UNUSED
,
7718 struct elf_aarch64_link_hash_table
7721 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
7722 small and large plts and at the minute just generates
7725 /* PLT0 of the small PLT looks like this in ELF64 -
7726 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
7727 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
7728 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
7730 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
7731 // GOTPLT entry for this.
7733 PLT0 will be slightly different in ELF32 due to different got entry
7736 bfd_vma plt_got_2nd_ent
; /* Address of GOT[2]. */
7740 memcpy (htab
->root
.splt
->contents
, elfNN_aarch64_small_plt0_entry
,
7742 elf_section_data (htab
->root
.splt
->output_section
)->this_hdr
.sh_entsize
=
7745 plt_got_2nd_ent
= (htab
->root
.sgotplt
->output_section
->vma
7746 + htab
->root
.sgotplt
->output_offset
7747 + GOT_ENTRY_SIZE
* 2);
7749 plt_base
= htab
->root
.splt
->output_section
->vma
+
7750 htab
->root
.splt
->output_offset
;
7752 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7753 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7754 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
7755 htab
->root
.splt
->contents
+ 4,
7756 PG (plt_got_2nd_ent
) - PG (plt_base
+ 4));
7758 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
7759 htab
->root
.splt
->contents
+ 8,
7760 PG_OFFSET (plt_got_2nd_ent
));
7762 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
7763 htab
->root
.splt
->contents
+ 12,
7764 PG_OFFSET (plt_got_2nd_ent
));
7768 elfNN_aarch64_finish_dynamic_sections (bfd
*output_bfd
,
7769 struct bfd_link_info
*info
)
7771 struct elf_aarch64_link_hash_table
*htab
;
7775 htab
= elf_aarch64_hash_table (info
);
7776 dynobj
= htab
->root
.dynobj
;
7777 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
7779 if (htab
->root
.dynamic_sections_created
)
7781 ElfNN_External_Dyn
*dyncon
, *dynconend
;
7783 if (sdyn
== NULL
|| htab
->root
.sgot
== NULL
)
7786 dyncon
= (ElfNN_External_Dyn
*) sdyn
->contents
;
7787 dynconend
= (ElfNN_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
7788 for (; dyncon
< dynconend
; dyncon
++)
7790 Elf_Internal_Dyn dyn
;
7793 bfd_elfNN_swap_dyn_in (dynobj
, dyncon
, &dyn
);
7801 s
= htab
->root
.sgotplt
;
7802 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
7806 dyn
.d_un
.d_ptr
= htab
->root
.srelplt
->output_section
->vma
;
7810 s
= htab
->root
.srelplt
;
7811 dyn
.d_un
.d_val
= s
->size
;
7815 /* The procedure linkage table relocs (DT_JMPREL) should
7816 not be included in the overall relocs (DT_RELA).
7817 Therefore, we override the DT_RELASZ entry here to
7818 make it not include the JMPREL relocs. Since the
7819 linker script arranges for .rela.plt to follow all
7820 other relocation sections, we don't have to worry
7821 about changing the DT_RELA entry. */
7822 if (htab
->root
.srelplt
!= NULL
)
7824 s
= htab
->root
.srelplt
;
7825 dyn
.d_un
.d_val
-= s
->size
;
7829 case DT_TLSDESC_PLT
:
7830 s
= htab
->root
.splt
;
7831 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
7832 + htab
->tlsdesc_plt
;
7835 case DT_TLSDESC_GOT
:
7836 s
= htab
->root
.sgot
;
7837 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
7838 + htab
->dt_tlsdesc_got
;
7842 bfd_elfNN_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
7847 /* Fill in the special first entry in the procedure linkage table. */
7848 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
7850 elfNN_aarch64_init_small_plt0_entry (output_bfd
, htab
);
7852 elf_section_data (htab
->root
.splt
->output_section
)->
7853 this_hdr
.sh_entsize
= htab
->plt_entry_size
;
7856 if (htab
->tlsdesc_plt
)
7858 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
7859 htab
->root
.sgot
->contents
+ htab
->dt_tlsdesc_got
);
7861 memcpy (htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
,
7862 elfNN_aarch64_tlsdesc_small_plt_entry
,
7863 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry
));
7866 bfd_vma adrp1_addr
=
7867 htab
->root
.splt
->output_section
->vma
7868 + htab
->root
.splt
->output_offset
+ htab
->tlsdesc_plt
+ 4;
7870 bfd_vma adrp2_addr
= adrp1_addr
+ 4;
7873 htab
->root
.sgot
->output_section
->vma
7874 + htab
->root
.sgot
->output_offset
;
7876 bfd_vma pltgot_addr
=
7877 htab
->root
.sgotplt
->output_section
->vma
7878 + htab
->root
.sgotplt
->output_offset
;
7880 bfd_vma dt_tlsdesc_got
= got_addr
+ htab
->dt_tlsdesc_got
;
7882 bfd_byte
*plt_entry
=
7883 htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
;
7885 /* adrp x2, DT_TLSDESC_GOT */
7886 elf_aarch64_update_plt_entry (output_bfd
,
7887 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
7889 (PG (dt_tlsdesc_got
)
7890 - PG (adrp1_addr
)));
7893 elf_aarch64_update_plt_entry (output_bfd
,
7894 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
7897 - PG (adrp2_addr
)));
7899 /* ldr x2, [x2, #0] */
7900 elf_aarch64_update_plt_entry (output_bfd
,
7901 BFD_RELOC_AARCH64_LDSTNN_LO12
,
7903 PG_OFFSET (dt_tlsdesc_got
));
7906 elf_aarch64_update_plt_entry (output_bfd
,
7907 BFD_RELOC_AARCH64_ADD_LO12
,
7909 PG_OFFSET (pltgot_addr
));
7914 if (htab
->root
.sgotplt
)
7916 if (bfd_is_abs_section (htab
->root
.sgotplt
->output_section
))
7918 (*_bfd_error_handler
)
7919 (_("discarded output section: `%A'"), htab
->root
.sgotplt
);
7923 /* Fill in the first three entries in the global offset table. */
7924 if (htab
->root
.sgotplt
->size
> 0)
7926 bfd_put_NN (output_bfd
, (bfd_vma
) 0, htab
->root
.sgotplt
->contents
);
7928 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
7929 bfd_put_NN (output_bfd
,
7931 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
7932 bfd_put_NN (output_bfd
,
7934 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
* 2);
7937 if (htab
->root
.sgot
)
7939 if (htab
->root
.sgot
->size
> 0)
7942 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0;
7943 bfd_put_NN (output_bfd
, addr
, htab
->root
.sgot
->contents
);
7947 elf_section_data (htab
->root
.sgotplt
->output_section
)->
7948 this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
7951 if (htab
->root
.sgot
&& htab
->root
.sgot
->size
> 0)
7952 elf_section_data (htab
->root
.sgot
->output_section
)->this_hdr
.sh_entsize
7955 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
7956 htab_traverse (htab
->loc_hash_table
,
7957 elfNN_aarch64_finish_local_dynamic_symbol
,
7963 /* Return address for Ith PLT stub in section PLT, for relocation REL
7964 or (bfd_vma) -1 if it should not be included. */
7967 elfNN_aarch64_plt_sym_val (bfd_vma i
, const asection
*plt
,
7968 const arelent
*rel ATTRIBUTE_UNUSED
)
7970 return plt
->vma
+ PLT_ENTRY_SIZE
+ i
* PLT_SMALL_ENTRY_SIZE
;
7974 /* We use this so we can override certain functions
7975 (though currently we don't). */
7977 const struct elf_size_info elfNN_aarch64_size_info
=
7979 sizeof (ElfNN_External_Ehdr
),
7980 sizeof (ElfNN_External_Phdr
),
7981 sizeof (ElfNN_External_Shdr
),
7982 sizeof (ElfNN_External_Rel
),
7983 sizeof (ElfNN_External_Rela
),
7984 sizeof (ElfNN_External_Sym
),
7985 sizeof (ElfNN_External_Dyn
),
7986 sizeof (Elf_External_Note
),
7987 4, /* Hash table entry size. */
7988 1, /* Internal relocs per external relocs. */
7989 ARCH_SIZE
, /* Arch size. */
7990 LOG_FILE_ALIGN
, /* Log_file_align. */
7991 ELFCLASSNN
, EV_CURRENT
,
7992 bfd_elfNN_write_out_phdrs
,
7993 bfd_elfNN_write_shdrs_and_ehdr
,
7994 bfd_elfNN_checksum_contents
,
7995 bfd_elfNN_write_relocs
,
7996 bfd_elfNN_swap_symbol_in
,
7997 bfd_elfNN_swap_symbol_out
,
7998 bfd_elfNN_slurp_reloc_table
,
7999 bfd_elfNN_slurp_symbol_table
,
8000 bfd_elfNN_swap_dyn_in
,
8001 bfd_elfNN_swap_dyn_out
,
8002 bfd_elfNN_swap_reloc_in
,
8003 bfd_elfNN_swap_reloc_out
,
8004 bfd_elfNN_swap_reloca_in
,
8005 bfd_elfNN_swap_reloca_out
8008 #define ELF_ARCH bfd_arch_aarch64
8009 #define ELF_MACHINE_CODE EM_AARCH64
8010 #define ELF_MAXPAGESIZE 0x10000
8011 #define ELF_MINPAGESIZE 0x1000
8012 #define ELF_COMMONPAGESIZE 0x1000
8014 #define bfd_elfNN_close_and_cleanup \
8015 elfNN_aarch64_close_and_cleanup
8017 #define bfd_elfNN_bfd_free_cached_info \
8018 elfNN_aarch64_bfd_free_cached_info
8020 #define bfd_elfNN_bfd_is_target_special_symbol \
8021 elfNN_aarch64_is_target_special_symbol
8023 #define bfd_elfNN_bfd_link_hash_table_create \
8024 elfNN_aarch64_link_hash_table_create
8026 #define bfd_elfNN_bfd_merge_private_bfd_data \
8027 elfNN_aarch64_merge_private_bfd_data
8029 #define bfd_elfNN_bfd_print_private_bfd_data \
8030 elfNN_aarch64_print_private_bfd_data
8032 #define bfd_elfNN_bfd_reloc_type_lookup \
8033 elfNN_aarch64_reloc_type_lookup
8035 #define bfd_elfNN_bfd_reloc_name_lookup \
8036 elfNN_aarch64_reloc_name_lookup
8038 #define bfd_elfNN_bfd_set_private_flags \
8039 elfNN_aarch64_set_private_flags
8041 #define bfd_elfNN_find_inliner_info \
8042 elfNN_aarch64_find_inliner_info
8044 #define bfd_elfNN_find_nearest_line \
8045 elfNN_aarch64_find_nearest_line
8047 #define bfd_elfNN_mkobject \
8048 elfNN_aarch64_mkobject
8050 #define bfd_elfNN_new_section_hook \
8051 elfNN_aarch64_new_section_hook
8053 #define elf_backend_adjust_dynamic_symbol \
8054 elfNN_aarch64_adjust_dynamic_symbol
8056 #define elf_backend_always_size_sections \
8057 elfNN_aarch64_always_size_sections
8059 #define elf_backend_check_relocs \
8060 elfNN_aarch64_check_relocs
8062 #define elf_backend_copy_indirect_symbol \
8063 elfNN_aarch64_copy_indirect_symbol
8065 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
8066 to them in our hash. */
8067 #define elf_backend_create_dynamic_sections \
8068 elfNN_aarch64_create_dynamic_sections
8070 #define elf_backend_init_index_section \
8071 _bfd_elf_init_2_index_sections
8073 #define elf_backend_finish_dynamic_sections \
8074 elfNN_aarch64_finish_dynamic_sections
8076 #define elf_backend_finish_dynamic_symbol \
8077 elfNN_aarch64_finish_dynamic_symbol
8079 #define elf_backend_gc_sweep_hook \
8080 elfNN_aarch64_gc_sweep_hook
8082 #define elf_backend_object_p \
8083 elfNN_aarch64_object_p
8085 #define elf_backend_output_arch_local_syms \
8086 elfNN_aarch64_output_arch_local_syms
8088 #define elf_backend_plt_sym_val \
8089 elfNN_aarch64_plt_sym_val
8091 #define elf_backend_post_process_headers \
8092 elfNN_aarch64_post_process_headers
8094 #define elf_backend_relocate_section \
8095 elfNN_aarch64_relocate_section
8097 #define elf_backend_reloc_type_class \
8098 elfNN_aarch64_reloc_type_class
8100 #define elf_backend_section_from_shdr \
8101 elfNN_aarch64_section_from_shdr
8103 #define elf_backend_size_dynamic_sections \
8104 elfNN_aarch64_size_dynamic_sections
8106 #define elf_backend_size_info \
8107 elfNN_aarch64_size_info
8109 #define elf_backend_write_section \
8110 elfNN_aarch64_write_section
8112 #define elf_backend_can_refcount 1
8113 #define elf_backend_can_gc_sections 1
8114 #define elf_backend_plt_readonly 1
8115 #define elf_backend_want_got_plt 1
8116 #define elf_backend_want_plt_sym 0
8117 #define elf_backend_may_use_rel_p 0
8118 #define elf_backend_may_use_rela_p 1
8119 #define elf_backend_default_use_rela_p 1
8120 #define elf_backend_rela_normal 1
8121 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
8122 #define elf_backend_default_execstack 0
8124 #undef elf_backend_obj_attrs_section
8125 #define elf_backend_obj_attrs_section ".ARM.attributes"
8127 #include "elfNN-target.h"