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_ADD_LO12_NC \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
188 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
189 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
190 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
192 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
194 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
195 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
203 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
204 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
208 #define ELIMINATE_COPY_RELOCS 0
210 /* Return size of a relocation entry. HTAB is the bfd's
211 elf_aarch64_link_hash_entry. */
212 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
214 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
215 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
216 #define PLT_ENTRY_SIZE (32)
217 #define PLT_SMALL_ENTRY_SIZE (16)
218 #define PLT_TLSDESC_ENTRY_SIZE (32)
220 /* Encoding of the nop instruction */
221 #define INSN_NOP 0xd503201f
223 #define aarch64_compute_jump_table_size(htab) \
224 (((htab)->root.srelplt == NULL) ? 0 \
225 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
227 /* The first entry in a procedure linkage table looks like this
228 if the distance between the PLTGOT and the PLT is < 4GB use
229 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
230 in x16 and needs to work out PLTGOT[1] by using an address of
231 [x16,#-GOT_ENTRY_SIZE]. */
232 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
234 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
235 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
237 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
238 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
240 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
241 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
243 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
244 0x1f, 0x20, 0x03, 0xd5, /* nop */
245 0x1f, 0x20, 0x03, 0xd5, /* nop */
246 0x1f, 0x20, 0x03, 0xd5, /* nop */
249 /* Per function entry in a procedure linkage table looks like this
250 if the distance between the PLTGOT and the PLT is < 4GB use
251 these PLT entries. */
252 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
254 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
256 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
257 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
259 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
260 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
262 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
265 static const bfd_byte
266 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
268 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
269 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
270 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
272 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
273 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
275 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
276 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
278 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
279 0x1f, 0x20, 0x03, 0xd5, /* nop */
280 0x1f, 0x20, 0x03, 0xd5, /* nop */
283 #define elf_info_to_howto elfNN_aarch64_info_to_howto
284 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
286 #define AARCH64_ELF_ABI_VERSION 0
288 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
289 #define ALL_ONES (~ (bfd_vma) 0)
291 /* Indexed by the bfd interal reloc enumerators.
292 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
295 static reloc_howto_type elfNN_aarch64_howto_table[] =
299 /* Basic data relocations. */
302 HOWTO (R_AARCH64_NULL, /* type */
304 3, /* size (0 = byte, 1 = short, 2 = long) */
306 FALSE, /* pc_relative */
308 complain_overflow_dont, /* complain_on_overflow */
309 bfd_elf_generic_reloc, /* special_function */
310 "R_AARCH64_NULL", /* name */
311 FALSE, /* partial_inplace */
314 FALSE), /* pcrel_offset */
316 HOWTO (R_AARCH64_NONE, /* type */
318 3, /* size (0 = byte, 1 = short, 2 = long) */
320 FALSE, /* pc_relative */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_AARCH64_NONE", /* name */
325 FALSE, /* partial_inplace */
328 FALSE), /* pcrel_offset */
332 HOWTO64 (AARCH64_R (ABS64), /* type */
334 4, /* size (4 = long long) */
336 FALSE, /* pc_relative */
338 complain_overflow_unsigned, /* complain_on_overflow */
339 bfd_elf_generic_reloc, /* special_function */
340 AARCH64_R_STR (ABS64), /* name */
341 FALSE, /* partial_inplace */
342 ALL_ONES, /* src_mask */
343 ALL_ONES, /* dst_mask */
344 FALSE), /* pcrel_offset */
347 HOWTO (AARCH64_R (ABS32), /* type */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
351 FALSE, /* pc_relative */
353 complain_overflow_unsigned, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 AARCH64_R_STR (ABS32), /* name */
356 FALSE, /* partial_inplace */
357 0xffffffff, /* src_mask */
358 0xffffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
362 HOWTO (AARCH64_R (ABS16), /* type */
364 1, /* size (0 = byte, 1 = short, 2 = long) */
366 FALSE, /* pc_relative */
368 complain_overflow_unsigned, /* complain_on_overflow */
369 bfd_elf_generic_reloc, /* special_function */
370 AARCH64_R_STR (ABS16), /* name */
371 FALSE, /* partial_inplace */
372 0xffff, /* src_mask */
373 0xffff, /* dst_mask */
374 FALSE), /* pcrel_offset */
376 /* .xword: (S+A-P) */
377 HOWTO64 (AARCH64_R (PREL64), /* type */
379 4, /* size (4 = long long) */
381 TRUE, /* pc_relative */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 AARCH64_R_STR (PREL64), /* name */
386 FALSE, /* partial_inplace */
387 ALL_ONES, /* src_mask */
388 ALL_ONES, /* dst_mask */
389 TRUE), /* pcrel_offset */
392 HOWTO (AARCH64_R (PREL32), /* type */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
396 TRUE, /* pc_relative */
398 complain_overflow_signed, /* complain_on_overflow */
399 bfd_elf_generic_reloc, /* special_function */
400 AARCH64_R_STR (PREL32), /* name */
401 FALSE, /* partial_inplace */
402 0xffffffff, /* src_mask */
403 0xffffffff, /* dst_mask */
404 TRUE), /* pcrel_offset */
407 HOWTO (AARCH64_R (PREL16), /* type */
409 1, /* size (0 = byte, 1 = short, 2 = long) */
411 TRUE, /* pc_relative */
413 complain_overflow_signed, /* complain_on_overflow */
414 bfd_elf_generic_reloc, /* special_function */
415 AARCH64_R_STR (PREL16), /* name */
416 FALSE, /* partial_inplace */
417 0xffff, /* src_mask */
418 0xffff, /* dst_mask */
419 TRUE), /* pcrel_offset */
421 /* Group relocations to create a 16, 32, 48 or 64 bit
422 unsigned data or abs address inline. */
424 /* MOVZ: ((S+A) >> 0) & 0xffff */
425 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
429 FALSE, /* pc_relative */
431 complain_overflow_unsigned, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 AARCH64_R_STR (MOVW_UABS_G0), /* name */
434 FALSE, /* partial_inplace */
435 0xffff, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
439 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
440 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
444 FALSE, /* pc_relative */
446 complain_overflow_dont, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
449 FALSE, /* partial_inplace */
450 0xffff, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
454 /* MOVZ: ((S+A) >> 16) & 0xffff */
455 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
459 FALSE, /* pc_relative */
461 complain_overflow_unsigned, /* complain_on_overflow */
462 bfd_elf_generic_reloc, /* special_function */
463 AARCH64_R_STR (MOVW_UABS_G1), /* name */
464 FALSE, /* partial_inplace */
465 0xffff, /* src_mask */
466 0xffff, /* dst_mask */
467 FALSE), /* pcrel_offset */
469 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
470 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
474 FALSE, /* pc_relative */
476 complain_overflow_dont, /* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
479 FALSE, /* partial_inplace */
480 0xffff, /* src_mask */
481 0xffff, /* dst_mask */
482 FALSE), /* pcrel_offset */
484 /* MOVZ: ((S+A) >> 32) & 0xffff */
485 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE, /* pc_relative */
491 complain_overflow_unsigned, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 AARCH64_R_STR (MOVW_UABS_G2), /* name */
494 FALSE, /* partial_inplace */
495 0xffff, /* src_mask */
496 0xffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
499 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
500 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
502 2, /* size (0 = byte, 1 = short, 2 = long) */
504 FALSE, /* pc_relative */
506 complain_overflow_dont, /* complain_on_overflow */
507 bfd_elf_generic_reloc, /* special_function */
508 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
509 FALSE, /* partial_inplace */
510 0xffff, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
514 /* MOVZ: ((S+A) >> 48) & 0xffff */
515 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
517 2, /* size (0 = byte, 1 = short, 2 = long) */
519 FALSE, /* pc_relative */
521 complain_overflow_unsigned, /* complain_on_overflow */
522 bfd_elf_generic_reloc, /* special_function */
523 AARCH64_R_STR (MOVW_UABS_G3), /* name */
524 FALSE, /* partial_inplace */
525 0xffff, /* src_mask */
526 0xffff, /* dst_mask */
527 FALSE), /* pcrel_offset */
529 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
530 signed data or abs address inline. Will change instruction
531 to MOVN or MOVZ depending on sign of calculated value. */
533 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
534 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
538 FALSE, /* pc_relative */
540 complain_overflow_signed, /* complain_on_overflow */
541 bfd_elf_generic_reloc, /* special_function */
542 AARCH64_R_STR (MOVW_SABS_G0), /* name */
543 FALSE, /* partial_inplace */
544 0xffff, /* src_mask */
545 0xffff, /* dst_mask */
546 FALSE), /* pcrel_offset */
548 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
549 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
553 FALSE, /* pc_relative */
555 complain_overflow_signed, /* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 AARCH64_R_STR (MOVW_SABS_G1), /* name */
558 FALSE, /* partial_inplace */
559 0xffff, /* src_mask */
560 0xffff, /* dst_mask */
561 FALSE), /* pcrel_offset */
563 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
564 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
568 FALSE, /* pc_relative */
570 complain_overflow_signed, /* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 AARCH64_R_STR (MOVW_SABS_G2), /* name */
573 FALSE, /* partial_inplace */
574 0xffff, /* src_mask */
575 0xffff, /* dst_mask */
576 FALSE), /* pcrel_offset */
578 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
579 addresses: PG(x) is (x & ~0xfff). */
581 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
582 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 TRUE, /* pc_relative */
588 complain_overflow_signed, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 AARCH64_R_STR (LD_PREL_LO19), /* name */
591 FALSE, /* partial_inplace */
592 0x7ffff, /* src_mask */
593 0x7ffff, /* dst_mask */
594 TRUE), /* pcrel_offset */
596 /* ADR: (S+A-P) & 0x1fffff */
597 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
599 2, /* size (0 = byte, 1 = short, 2 = long) */
601 TRUE, /* pc_relative */
603 complain_overflow_signed, /* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 AARCH64_R_STR (ADR_PREL_LO21), /* name */
606 FALSE, /* partial_inplace */
607 0x1fffff, /* src_mask */
608 0x1fffff, /* dst_mask */
609 TRUE), /* pcrel_offset */
611 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
612 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
616 TRUE, /* pc_relative */
618 complain_overflow_signed, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
621 FALSE, /* partial_inplace */
622 0x1fffff, /* src_mask */
623 0x1fffff, /* dst_mask */
624 TRUE), /* pcrel_offset */
626 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
627 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
631 TRUE, /* pc_relative */
633 complain_overflow_dont, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
636 FALSE, /* partial_inplace */
637 0x1fffff, /* src_mask */
638 0x1fffff, /* dst_mask */
639 TRUE), /* pcrel_offset */
641 /* ADD: (S+A) & 0xfff [no overflow check] */
642 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
644 2, /* size (0 = byte, 1 = short, 2 = long) */
646 FALSE, /* pc_relative */
648 complain_overflow_dont, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
651 FALSE, /* partial_inplace */
652 0x3ffc00, /* src_mask */
653 0x3ffc00, /* dst_mask */
654 FALSE), /* pcrel_offset */
656 /* LD/ST8: (S+A) & 0xfff */
657 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
661 FALSE, /* pc_relative */
663 complain_overflow_dont, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
666 FALSE, /* partial_inplace */
667 0xfff, /* src_mask */
668 0xfff, /* dst_mask */
669 FALSE), /* pcrel_offset */
671 /* Relocations for control-flow instructions. */
673 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
674 HOWTO (AARCH64_R (TSTBR14), /* type */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
678 TRUE, /* pc_relative */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 AARCH64_R_STR (TSTBR14), /* name */
683 FALSE, /* partial_inplace */
684 0x3fff, /* src_mask */
685 0x3fff, /* dst_mask */
686 TRUE), /* pcrel_offset */
688 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
689 HOWTO (AARCH64_R (CONDBR19), /* type */
691 2, /* size (0 = byte, 1 = short, 2 = long) */
693 TRUE, /* pc_relative */
695 complain_overflow_signed, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 AARCH64_R_STR (CONDBR19), /* name */
698 FALSE, /* partial_inplace */
699 0x7ffff, /* src_mask */
700 0x7ffff, /* dst_mask */
701 TRUE), /* pcrel_offset */
703 /* B: ((S+A-P) >> 2) & 0x3ffffff */
704 HOWTO (AARCH64_R (JUMP26), /* type */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
708 TRUE, /* pc_relative */
710 complain_overflow_signed, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 AARCH64_R_STR (JUMP26), /* name */
713 FALSE, /* partial_inplace */
714 0x3ffffff, /* src_mask */
715 0x3ffffff, /* dst_mask */
716 TRUE), /* pcrel_offset */
718 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
719 HOWTO (AARCH64_R (CALL26), /* type */
721 2, /* size (0 = byte, 1 = short, 2 = long) */
723 TRUE, /* pc_relative */
725 complain_overflow_signed, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 AARCH64_R_STR (CALL26), /* name */
728 FALSE, /* partial_inplace */
729 0x3ffffff, /* src_mask */
730 0x3ffffff, /* dst_mask */
731 TRUE), /* pcrel_offset */
733 /* LD/ST16: (S+A) & 0xffe */
734 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
736 2, /* size (0 = byte, 1 = short, 2 = long) */
738 FALSE, /* pc_relative */
740 complain_overflow_dont, /* complain_on_overflow */
741 bfd_elf_generic_reloc, /* special_function */
742 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
743 FALSE, /* partial_inplace */
744 0xffe, /* src_mask */
745 0xffe, /* dst_mask */
746 FALSE), /* pcrel_offset */
748 /* LD/ST32: (S+A) & 0xffc */
749 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
753 FALSE, /* pc_relative */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
758 FALSE, /* partial_inplace */
759 0xffc, /* src_mask */
760 0xffc, /* dst_mask */
761 FALSE), /* pcrel_offset */
763 /* LD/ST64: (S+A) & 0xff8 */
764 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
766 2, /* size (0 = byte, 1 = short, 2 = long) */
768 FALSE, /* pc_relative */
770 complain_overflow_dont, /* complain_on_overflow */
771 bfd_elf_generic_reloc, /* special_function */
772 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
773 FALSE, /* partial_inplace */
774 0xff8, /* src_mask */
775 0xff8, /* dst_mask */
776 FALSE), /* pcrel_offset */
778 /* LD/ST128: (S+A) & 0xff0 */
779 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
783 FALSE, /* pc_relative */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
788 FALSE, /* partial_inplace */
789 0xff0, /* src_mask */
790 0xff0, /* dst_mask */
791 FALSE), /* pcrel_offset */
793 /* Set a load-literal immediate field to bits
794 0x1FFFFC of G(S)-P */
795 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
797 2, /* size (0 = byte,1 = short,2 = long) */
799 TRUE, /* pc_relative */
801 complain_overflow_signed, /* complain_on_overflow */
802 bfd_elf_generic_reloc, /* special_function */
803 AARCH64_R_STR (GOT_LD_PREL19), /* name */
804 FALSE, /* partial_inplace */
805 0xffffe0, /* src_mask */
806 0xffffe0, /* dst_mask */
807 TRUE), /* pcrel_offset */
809 /* Get to the page for the GOT entry for the symbol
810 (G(S) - P) using an ADRP instruction. */
811 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
815 TRUE, /* pc_relative */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
820 FALSE, /* partial_inplace */
821 0x1fffff, /* src_mask */
822 0x1fffff, /* dst_mask */
823 TRUE), /* pcrel_offset */
825 /* LD64: GOT offset G(S) & 0xff8 */
826 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
828 2, /* size (0 = byte, 1 = short, 2 = long) */
830 FALSE, /* pc_relative */
832 complain_overflow_dont, /* complain_on_overflow */
833 bfd_elf_generic_reloc, /* special_function */
834 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
835 FALSE, /* partial_inplace */
836 0xff8, /* src_mask */
837 0xff8, /* dst_mask */
838 FALSE), /* pcrel_offset */
840 /* LD32: GOT offset G(S) & 0xffc */
841 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
843 2, /* size (0 = byte, 1 = short, 2 = long) */
845 FALSE, /* pc_relative */
847 complain_overflow_dont, /* complain_on_overflow */
848 bfd_elf_generic_reloc, /* special_function */
849 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
850 FALSE, /* partial_inplace */
851 0xffc, /* src_mask */
852 0xffc, /* dst_mask */
853 FALSE), /* pcrel_offset */
855 /* LD64: GOT offset for the symbol. */
856 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */
858 2, /* size (0 = byte, 1 = short, 2 = long) */
860 FALSE, /* pc_relative */
862 complain_overflow_unsigned, /* complain_on_overflow */
863 bfd_elf_generic_reloc, /* special_function */
864 AARCH64_R_STR (LD64_GOTOFF_LO15), /* name */
865 FALSE, /* partial_inplace */
866 0x7ff8, /* src_mask */
867 0x7ff8, /* dst_mask */
868 FALSE), /* pcrel_offset */
870 /* LD32: GOT offset to the page address of GOT table.
871 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
872 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14), /* type */
874 2, /* size (0 = byte, 1 = short, 2 = long) */
876 FALSE, /* pc_relative */
878 complain_overflow_unsigned, /* complain_on_overflow */
879 bfd_elf_generic_reloc, /* special_function */
880 AARCH64_R_STR (LD32_GOTPAGE_LO14), /* name */
881 FALSE, /* partial_inplace */
882 0x5ffc, /* src_mask */
883 0x5ffc, /* dst_mask */
884 FALSE), /* pcrel_offset */
886 /* LD64: GOT offset to the page address of GOT table.
887 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
888 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15), /* type */
890 2, /* size (0 = byte, 1 = short, 2 = long) */
892 FALSE, /* pc_relative */
894 complain_overflow_unsigned, /* complain_on_overflow */
895 bfd_elf_generic_reloc, /* special_function */
896 AARCH64_R_STR (LD64_GOTPAGE_LO15), /* name */
897 FALSE, /* partial_inplace */
898 0x7ff8, /* src_mask */
899 0x7ff8, /* dst_mask */
900 FALSE), /* pcrel_offset */
902 /* Get to the page for the GOT entry for the symbol
903 (G(S) - P) using an ADRP instruction. */
904 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
906 2, /* size (0 = byte, 1 = short, 2 = long) */
908 TRUE, /* pc_relative */
910 complain_overflow_dont, /* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
913 FALSE, /* partial_inplace */
914 0x1fffff, /* src_mask */
915 0x1fffff, /* dst_mask */
916 TRUE), /* pcrel_offset */
918 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
920 2, /* size (0 = byte, 1 = short, 2 = long) */
922 TRUE, /* pc_relative */
924 complain_overflow_dont, /* complain_on_overflow */
925 bfd_elf_generic_reloc, /* special_function */
926 AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
927 FALSE, /* partial_inplace */
928 0x1fffff, /* src_mask */
929 0x1fffff, /* dst_mask */
930 TRUE), /* pcrel_offset */
932 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
933 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
935 2, /* size (0 = byte, 1 = short, 2 = long) */
937 FALSE, /* pc_relative */
939 complain_overflow_dont, /* complain_on_overflow */
940 bfd_elf_generic_reloc, /* special_function */
941 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
942 FALSE, /* partial_inplace */
943 0xfff, /* src_mask */
944 0xfff, /* dst_mask */
945 FALSE), /* pcrel_offset */
947 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
949 2, /* size (0 = byte, 1 = short, 2 = long) */
951 FALSE, /* pc_relative */
953 complain_overflow_dont, /* complain_on_overflow */
954 bfd_elf_generic_reloc, /* special_function */
955 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
956 FALSE, /* partial_inplace */
957 0xffff, /* src_mask */
958 0xffff, /* dst_mask */
959 FALSE), /* pcrel_offset */
961 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
965 FALSE, /* pc_relative */
967 complain_overflow_dont, /* complain_on_overflow */
968 bfd_elf_generic_reloc, /* special_function */
969 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
970 FALSE, /* partial_inplace */
971 0xffff, /* src_mask */
972 0xffff, /* dst_mask */
973 FALSE), /* pcrel_offset */
975 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
977 2, /* size (0 = byte, 1 = short, 2 = long) */
979 FALSE, /* pc_relative */
981 complain_overflow_dont, /* complain_on_overflow */
982 bfd_elf_generic_reloc, /* special_function */
983 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
984 FALSE, /* partial_inplace */
985 0x1fffff, /* src_mask */
986 0x1fffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
989 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
991 2, /* size (0 = byte, 1 = short, 2 = long) */
993 FALSE, /* pc_relative */
995 complain_overflow_dont, /* complain_on_overflow */
996 bfd_elf_generic_reloc, /* special_function */
997 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
998 FALSE, /* partial_inplace */
999 0xff8, /* src_mask */
1000 0xff8, /* dst_mask */
1001 FALSE), /* pcrel_offset */
1003 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
1005 2, /* size (0 = byte, 1 = short, 2 = long) */
1007 FALSE, /* pc_relative */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 bfd_elf_generic_reloc, /* special_function */
1011 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
1012 FALSE, /* partial_inplace */
1013 0xffc, /* src_mask */
1014 0xffc, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1017 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
1019 2, /* size (0 = byte, 1 = short, 2 = long) */
1021 FALSE, /* pc_relative */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 bfd_elf_generic_reloc, /* special_function */
1025 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
1026 FALSE, /* partial_inplace */
1027 0x1ffffc, /* src_mask */
1028 0x1ffffc, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1031 /* Unsigned 12 bit byte offset to module TLS base address. */
1032 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12), /* type */
1034 2, /* size (0 = byte, 1 = short, 2 = long) */
1036 FALSE, /* pc_relative */
1038 complain_overflow_unsigned, /* complain_on_overflow */
1039 bfd_elf_generic_reloc, /* special_function */
1040 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12), /* name */
1041 FALSE, /* partial_inplace */
1042 0xfff, /* src_mask */
1043 0xfff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1046 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1047 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */
1049 2, /* size (0 = byte, 1 = short, 2 = long) */
1051 FALSE, /* pc_relative */
1053 complain_overflow_dont, /* complain_on_overflow */
1054 bfd_elf_generic_reloc, /* special_function */
1055 AARCH64_R_STR (TLSLD_ADD_LO12_NC), /* name */
1056 FALSE, /* partial_inplace */
1057 0xfff, /* src_mask */
1058 0xfff, /* dst_mask */
1059 FALSE), /* pcrel_offset */
1061 /* Get to the page for the GOT entry for the symbol
1062 (G(S) - P) using an ADRP instruction. */
1063 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21), /* type */
1064 12, /* rightshift */
1065 2, /* size (0 = byte, 1 = short, 2 = long) */
1067 TRUE, /* pc_relative */
1069 complain_overflow_signed, /* complain_on_overflow */
1070 bfd_elf_generic_reloc, /* special_function */
1071 AARCH64_R_STR (TLSLD_ADR_PAGE21), /* name */
1072 FALSE, /* partial_inplace */
1073 0x1fffff, /* src_mask */
1074 0x1fffff, /* dst_mask */
1075 TRUE), /* pcrel_offset */
1077 HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */
1079 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 TRUE, /* pc_relative */
1083 complain_overflow_signed, /* complain_on_overflow */
1084 bfd_elf_generic_reloc, /* special_function */
1085 AARCH64_R_STR (TLSLD_ADR_PREL21), /* name */
1086 FALSE, /* partial_inplace */
1087 0x1fffff, /* src_mask */
1088 0x1fffff, /* dst_mask */
1089 TRUE), /* pcrel_offset */
1091 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
1092 32, /* rightshift */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 FALSE, /* pc_relative */
1097 complain_overflow_unsigned, /* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
1100 FALSE, /* partial_inplace */
1101 0xffff, /* src_mask */
1102 0xffff, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1105 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
1106 16, /* rightshift */
1107 2, /* size (0 = byte, 1 = short, 2 = long) */
1109 FALSE, /* pc_relative */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 bfd_elf_generic_reloc, /* special_function */
1113 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
1114 FALSE, /* partial_inplace */
1115 0xffff, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1119 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1120 16, /* rightshift */
1121 2, /* size (0 = byte, 1 = short, 2 = long) */
1123 FALSE, /* pc_relative */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 bfd_elf_generic_reloc, /* special_function */
1127 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1128 FALSE, /* partial_inplace */
1129 0xffff, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1133 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1135 2, /* size (0 = byte, 1 = short, 2 = long) */
1137 FALSE, /* pc_relative */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 bfd_elf_generic_reloc, /* special_function */
1141 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1142 FALSE, /* partial_inplace */
1143 0xffff, /* src_mask */
1144 0xffff, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1147 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1149 2, /* size (0 = byte, 1 = short, 2 = long) */
1151 FALSE, /* pc_relative */
1153 complain_overflow_dont, /* complain_on_overflow */
1154 bfd_elf_generic_reloc, /* special_function */
1155 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1156 FALSE, /* partial_inplace */
1157 0xffff, /* src_mask */
1158 0xffff, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1161 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1162 12, /* rightshift */
1163 2, /* size (0 = byte, 1 = short, 2 = long) */
1165 FALSE, /* pc_relative */
1167 complain_overflow_unsigned, /* complain_on_overflow */
1168 bfd_elf_generic_reloc, /* special_function */
1169 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1170 FALSE, /* partial_inplace */
1171 0xfff, /* src_mask */
1172 0xfff, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1175 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1177 2, /* size (0 = byte, 1 = short, 2 = long) */
1179 FALSE, /* pc_relative */
1181 complain_overflow_unsigned, /* complain_on_overflow */
1182 bfd_elf_generic_reloc, /* special_function */
1183 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1184 FALSE, /* partial_inplace */
1185 0xfff, /* src_mask */
1186 0xfff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1189 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1191 2, /* size (0 = byte, 1 = short, 2 = long) */
1193 FALSE, /* pc_relative */
1195 complain_overflow_dont, /* complain_on_overflow */
1196 bfd_elf_generic_reloc, /* special_function */
1197 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1198 FALSE, /* partial_inplace */
1199 0xfff, /* src_mask */
1200 0xfff, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1203 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1205 2, /* size (0 = byte, 1 = short, 2 = long) */
1207 TRUE, /* pc_relative */
1209 complain_overflow_dont, /* complain_on_overflow */
1210 bfd_elf_generic_reloc, /* special_function */
1211 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1212 FALSE, /* partial_inplace */
1213 0x0ffffe0, /* src_mask */
1214 0x0ffffe0, /* dst_mask */
1215 TRUE), /* pcrel_offset */
1217 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1219 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 TRUE, /* pc_relative */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 bfd_elf_generic_reloc, /* special_function */
1225 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1226 FALSE, /* partial_inplace */
1227 0x1fffff, /* src_mask */
1228 0x1fffff, /* dst_mask */
1229 TRUE), /* pcrel_offset */
1231 /* Get to the page for the GOT entry for the symbol
1232 (G(S) - P) using an ADRP instruction. */
1233 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1234 12, /* rightshift */
1235 2, /* size (0 = byte, 1 = short, 2 = long) */
1237 TRUE, /* pc_relative */
1239 complain_overflow_dont, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1242 FALSE, /* partial_inplace */
1243 0x1fffff, /* src_mask */
1244 0x1fffff, /* dst_mask */
1245 TRUE), /* pcrel_offset */
1247 /* LD64: GOT offset G(S) & 0xff8. */
1248 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1250 2, /* size (0 = byte, 1 = short, 2 = long) */
1252 FALSE, /* pc_relative */
1254 complain_overflow_dont, /* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1257 FALSE, /* partial_inplace */
1258 0xff8, /* src_mask */
1259 0xff8, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1262 /* LD32: GOT offset G(S) & 0xffc. */
1263 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1265 2, /* size (0 = byte, 1 = short, 2 = long) */
1267 FALSE, /* pc_relative */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1272 FALSE, /* partial_inplace */
1273 0xffc, /* src_mask */
1274 0xffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1277 /* ADD: GOT offset G(S) & 0xfff. */
1278 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1280 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 FALSE, /* pc_relative */
1284 complain_overflow_dont, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1287 FALSE, /* partial_inplace */
1288 0xfff, /* src_mask */
1289 0xfff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1292 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1293 16, /* rightshift */
1294 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 FALSE, /* pc_relative */
1298 complain_overflow_dont, /* complain_on_overflow */
1299 bfd_elf_generic_reloc, /* special_function */
1300 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1301 FALSE, /* partial_inplace */
1302 0xffff, /* src_mask */
1303 0xffff, /* dst_mask */
1304 FALSE), /* pcrel_offset */
1306 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1308 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 FALSE, /* pc_relative */
1312 complain_overflow_dont, /* complain_on_overflow */
1313 bfd_elf_generic_reloc, /* special_function */
1314 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1315 FALSE, /* partial_inplace */
1316 0xffff, /* src_mask */
1317 0xffff, /* dst_mask */
1318 FALSE), /* pcrel_offset */
1320 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1322 2, /* size (0 = byte, 1 = short, 2 = long) */
1324 FALSE, /* pc_relative */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 bfd_elf_generic_reloc, /* special_function */
1328 AARCH64_R_STR (TLSDESC_LDR), /* name */
1329 FALSE, /* partial_inplace */
1332 FALSE), /* pcrel_offset */
1334 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1336 2, /* size (0 = byte, 1 = short, 2 = long) */
1338 FALSE, /* pc_relative */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 bfd_elf_generic_reloc, /* special_function */
1342 AARCH64_R_STR (TLSDESC_ADD), /* name */
1343 FALSE, /* partial_inplace */
1346 FALSE), /* pcrel_offset */
1348 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1350 2, /* size (0 = byte, 1 = short, 2 = long) */
1352 FALSE, /* pc_relative */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 bfd_elf_generic_reloc, /* special_function */
1356 AARCH64_R_STR (TLSDESC_CALL), /* name */
1357 FALSE, /* partial_inplace */
1360 FALSE), /* pcrel_offset */
1362 HOWTO (AARCH64_R (COPY), /* type */
1364 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 FALSE, /* pc_relative */
1368 complain_overflow_bitfield, /* complain_on_overflow */
1369 bfd_elf_generic_reloc, /* special_function */
1370 AARCH64_R_STR (COPY), /* name */
1371 TRUE, /* partial_inplace */
1372 0xffffffff, /* src_mask */
1373 0xffffffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1376 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1378 2, /* size (0 = byte, 1 = short, 2 = long) */
1380 FALSE, /* pc_relative */
1382 complain_overflow_bitfield, /* complain_on_overflow */
1383 bfd_elf_generic_reloc, /* special_function */
1384 AARCH64_R_STR (GLOB_DAT), /* name */
1385 TRUE, /* partial_inplace */
1386 0xffffffff, /* src_mask */
1387 0xffffffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1390 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1392 2, /* size (0 = byte, 1 = short, 2 = long) */
1394 FALSE, /* pc_relative */
1396 complain_overflow_bitfield, /* complain_on_overflow */
1397 bfd_elf_generic_reloc, /* special_function */
1398 AARCH64_R_STR (JUMP_SLOT), /* name */
1399 TRUE, /* partial_inplace */
1400 0xffffffff, /* src_mask */
1401 0xffffffff, /* dst_mask */
1402 FALSE), /* pcrel_offset */
1404 HOWTO (AARCH64_R (RELATIVE), /* type */
1406 2, /* size (0 = byte, 1 = short, 2 = long) */
1408 FALSE, /* pc_relative */
1410 complain_overflow_bitfield, /* complain_on_overflow */
1411 bfd_elf_generic_reloc, /* special_function */
1412 AARCH64_R_STR (RELATIVE), /* name */
1413 TRUE, /* partial_inplace */
1414 ALL_ONES, /* src_mask */
1415 ALL_ONES, /* dst_mask */
1416 FALSE), /* pcrel_offset */
1418 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1422 FALSE, /* pc_relative */
1424 complain_overflow_dont, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1427 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1429 AARCH64_R_STR (TLS_DTPMOD), /* name */
1431 FALSE, /* partial_inplace */
1433 ALL_ONES, /* dst_mask */
1434 FALSE), /* pc_reloffset */
1436 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1438 2, /* size (0 = byte, 1 = short, 2 = long) */
1440 FALSE, /* pc_relative */
1442 complain_overflow_dont, /* complain_on_overflow */
1443 bfd_elf_generic_reloc, /* special_function */
1445 AARCH64_R_STR (TLS_DTPREL64), /* name */
1447 AARCH64_R_STR (TLS_DTPREL), /* name */
1449 FALSE, /* partial_inplace */
1451 ALL_ONES, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1454 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1456 2, /* size (0 = byte, 1 = short, 2 = long) */
1458 FALSE, /* pc_relative */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 bfd_elf_generic_reloc, /* special_function */
1463 AARCH64_R_STR (TLS_TPREL64), /* name */
1465 AARCH64_R_STR (TLS_TPREL), /* name */
1467 FALSE, /* partial_inplace */
1469 ALL_ONES, /* dst_mask */
1470 FALSE), /* pcrel_offset */
1472 HOWTO (AARCH64_R (TLSDESC), /* type */
1474 2, /* size (0 = byte, 1 = short, 2 = long) */
1476 FALSE, /* pc_relative */
1478 complain_overflow_dont, /* complain_on_overflow */
1479 bfd_elf_generic_reloc, /* special_function */
1480 AARCH64_R_STR (TLSDESC), /* name */
1481 FALSE, /* partial_inplace */
1483 ALL_ONES, /* dst_mask */
1484 FALSE), /* pcrel_offset */
1486 HOWTO (AARCH64_R (IRELATIVE), /* type */
1488 2, /* size (0 = byte, 1 = short, 2 = long) */
1490 FALSE, /* pc_relative */
1492 complain_overflow_bitfield, /* complain_on_overflow */
1493 bfd_elf_generic_reloc, /* special_function */
1494 AARCH64_R_STR (IRELATIVE), /* name */
1495 FALSE, /* partial_inplace */
1497 ALL_ONES, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1503 static reloc_howto_type elfNN_aarch64_howto_none =
1504 HOWTO (R_AARCH64_NONE, /* type */
1506 3, /* size (0 = byte, 1 = short, 2 = long) */
1508 FALSE, /* pc_relative */
1510 complain_overflow_dont,/* complain_on_overflow */
1511 bfd_elf_generic_reloc, /* special_function */
1512 "R_AARCH64_NONE", /* name */
1513 FALSE, /* partial_inplace */
1516 FALSE); /* pcrel_offset */
1518 /* Given HOWTO, return the bfd internal relocation enumerator. */
1520 static bfd_reloc_code_real_type
1521 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1524 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1525 const ptrdiff_t offset
1526 = howto - elfNN_aarch64_howto_table;
1528 if (offset > 0 && offset < size - 1)
1529 return BFD_RELOC_AARCH64_RELOC_START + offset;
1531 if (howto == &elfNN_aarch64_howto_none)
1532 return BFD_RELOC_AARCH64_NONE;
1534 return BFD_RELOC_AARCH64_RELOC_START;
1537 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1539 static bfd_reloc_code_real_type
1540 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1542 static bfd_boolean initialized_p = FALSE;
1543 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1544 static unsigned int offsets[R_AARCH64_end];
1546 if (initialized_p == FALSE)
1550 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1551 if (elfNN_aarch64_howto_table[i].type != 0)
1552 offsets[elfNN_aarch64_howto_table[i].type] = i;
1554 initialized_p = TRUE;
1557 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1558 return BFD_RELOC_AARCH64_NONE;
1560 /* PR 17512: file: b371e70a. */
1561 if (r_type >= R_AARCH64_end)
1563 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type);
1564 bfd_set_error (bfd_error_bad_value);
1565 return BFD_RELOC_AARCH64_NONE;
1568 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1571 struct elf_aarch64_reloc_map
1573 bfd_reloc_code_real_type from;
1574 bfd_reloc_code_real_type to;
1577 /* Map bfd generic reloc to AArch64-specific reloc. */
1578 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1580 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1582 /* Basic data relocations. */
1583 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1584 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1585 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1586 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1587 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1588 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1589 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1592 /* Given the bfd internal relocation enumerator in CODE, return the
1593 corresponding howto entry. */
1595 static reloc_howto_type *
1596 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1600 /* Convert bfd generic reloc to AArch64-specific reloc. */
1601 if (code < BFD_RELOC_AARCH64_RELOC_START
1602 || code > BFD_RELOC_AARCH64_RELOC_END)
1603 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1604 if (elf_aarch64_reloc_map[i].from == code)
1606 code = elf_aarch64_reloc_map[i].to;
1610 if (code > BFD_RELOC_AARCH64_RELOC_START
1611 && code < BFD_RELOC_AARCH64_RELOC_END)
1612 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1613 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1615 if (code == BFD_RELOC_AARCH64_NONE)
1616 return &elfNN_aarch64_howto_none;
1621 static reloc_howto_type *
1622 elfNN_aarch64_howto_from_type (unsigned int r_type)
1624 bfd_reloc_code_real_type val;
1625 reloc_howto_type *howto;
1630 bfd_set_error (bfd_error_bad_value);
1635 if (r_type == R_AARCH64_NONE)
1636 return &elfNN_aarch64_howto_none;
1638 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1639 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1644 bfd_set_error (bfd_error_bad_value);
1649 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1650 Elf_Internal_Rela *elf_reloc)
1652 unsigned int r_type;
1654 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1655 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1658 static reloc_howto_type *
1659 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1660 bfd_reloc_code_real_type code)
1662 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1667 bfd_set_error (bfd_error_bad_value);
1671 static reloc_howto_type *
1672 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1677 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1678 if (elfNN_aarch64_howto_table[i].name != NULL
1679 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1680 return &elfNN_aarch64_howto_table[i];
1685 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
1686 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1687 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
1688 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1690 /* The linker script knows the section names for placement.
1691 The entry_names are used to do simple name mangling on the stubs.
1692 Given a function name, and its type, the stub can be found. The
1693 name can be changed. The only requirement is the %s be present. */
1694 #define STUB_ENTRY_NAME "__%s_veneer"
1696 /* The name of the dynamic interpreter. This is put in the .interp
1698 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1700 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1701 (((1 << 25) - 1) << 2)
1702 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1705 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1706 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1709 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1711 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1712 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
1716 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
1718 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
1719 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
1720 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
1723 static const uint32_t aarch64_adrp_branch_stub [] =
1725 0x90000010, /* adrp ip0, X */
1726 /* R_AARCH64_ADR_HI21_PCREL(X) */
1727 0x91000210, /* add ip0, ip0, :lo12:X */
1728 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
1729 0xd61f0200, /* br ip0 */
1732 static const uint32_t aarch64_long_branch_stub[] =
1735 0x58000090, /* ldr ip0, 1f */
1737 0x18000090, /* ldr wip0, 1f */
1739 0x10000011, /* adr ip1, #0 */
1740 0x8b110210, /* add ip0, ip0, ip1 */
1741 0xd61f0200, /* br ip0 */
1742 0x00000000, /* 1: .xword or .word
1743 R_AARCH64_PRELNN(X) + 12
1748 static const uint32_t aarch64_erratum_835769_stub[] =
1750 0x00000000, /* Placeholder for multiply accumulate. */
1751 0x14000000, /* b <label> */
1754 static const uint32_t aarch64_erratum_843419_stub[] =
1756 0x00000000, /* Placeholder for LDR instruction. */
1757 0x14000000, /* b <label> */
1760 /* Section name for stubs is the associated section name plus this
1762 #define STUB_SUFFIX ".stub"
1764 enum elf_aarch64_stub_type
1767 aarch64_stub_adrp_branch,
1768 aarch64_stub_long_branch,
1769 aarch64_stub_erratum_835769_veneer,
1770 aarch64_stub_erratum_843419_veneer,
1773 struct elf_aarch64_stub_hash_entry
1775 /* Base hash table entry structure. */
1776 struct bfd_hash_entry root;
1778 /* The stub section. */
1781 /* Offset within stub_sec of the beginning of this stub. */
1782 bfd_vma stub_offset;
1784 /* Given the symbol's value and its section we can determine its final
1785 value when building the stubs (so the stub knows where to jump). */
1786 bfd_vma target_value;
1787 asection *target_section;
1789 enum elf_aarch64_stub_type stub_type;
1791 /* The symbol table entry, if any, that this was derived from. */
1792 struct elf_aarch64_link_hash_entry *h;
1794 /* Destination symbol type */
1795 unsigned char st_type;
1797 /* Where this stub is being called from, or, in the case of combined
1798 stub sections, the first input section in the group. */
1801 /* The name for the local symbol at the start of this stub. The
1802 stub name in the hash table has to be unique; this does not, so
1803 it can be friendlier. */
1806 /* The instruction which caused this stub to be generated (only valid for
1807 erratum 835769 workaround stubs at present). */
1808 uint32_t veneered_insn;
1810 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
1811 bfd_vma adrp_offset;
1814 /* Used to build a map of a section. This is required for mixed-endian
1817 typedef struct elf_elf_section_map
1822 elf_aarch64_section_map;
1825 typedef struct _aarch64_elf_section_data
1827 struct bfd_elf_section_data elf;
1828 unsigned int mapcount;
1829 unsigned int mapsize;
1830 elf_aarch64_section_map *map;
1832 _aarch64_elf_section_data;
1834 #define elf_aarch64_section_data(sec) \
1835 ((_aarch64_elf_section_data *) elf_section_data (sec))
1837 /* The size of the thread control block which is defined to be two pointers. */
1838 #define TCB_SIZE (ARCH_SIZE/8)*2
1840 struct elf_aarch64_local_symbol
1842 unsigned int got_type;
1843 bfd_signed_vma got_refcount;
1846 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1847 offset is from the end of the jump table and reserved entries
1850 The magic value (bfd_vma) -1 indicates that an offset has not be
1852 bfd_vma tlsdesc_got_jump_table_offset;
1855 struct elf_aarch64_obj_tdata
1857 struct elf_obj_tdata root;
1859 /* local symbol descriptors */
1860 struct elf_aarch64_local_symbol *locals;
1862 /* Zero to warn when linking objects with incompatible enum sizes. */
1863 int no_enum_size_warning;
1865 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1866 int no_wchar_size_warning;
1869 #define elf_aarch64_tdata(bfd) \
1870 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1872 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1874 #define is_aarch64_elf(bfd) \
1875 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1876 && elf_tdata (bfd) != NULL \
1877 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1880 elfNN_aarch64_mkobject (bfd *abfd)
1882 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1886 #define elf_aarch64_hash_entry(ent) \
1887 ((struct elf_aarch64_link_hash_entry *)(ent))
1889 #define GOT_UNKNOWN 0
1890 #define GOT_NORMAL 1
1891 #define GOT_TLS_GD 2
1892 #define GOT_TLS_IE 4
1893 #define GOT_TLSDESC_GD 8
1895 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1897 /* AArch64 ELF linker hash entry. */
1898 struct elf_aarch64_link_hash_entry
1900 struct elf_link_hash_entry root;
1902 /* Track dynamic relocs copied for this symbol. */
1903 struct elf_dyn_relocs *dyn_relocs;
1905 /* Since PLT entries have variable size, we need to record the
1906 index into .got.plt instead of recomputing it from the PLT
1908 bfd_signed_vma plt_got_offset;
1910 /* Bit mask representing the type of GOT entry(s) if any required by
1912 unsigned int got_type;
1914 /* A pointer to the most recently used stub hash entry against this
1916 struct elf_aarch64_stub_hash_entry *stub_cache;
1918 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1919 is from the end of the jump table and reserved entries within the PLTGOT.
1921 The magic value (bfd_vma) -1 indicates that an offset has not
1923 bfd_vma tlsdesc_got_jump_table_offset;
1927 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1929 unsigned long r_symndx)
1932 return elf_aarch64_hash_entry (h)->got_type;
1934 if (! elf_aarch64_locals (abfd))
1937 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1940 /* Get the AArch64 elf linker hash table from a link_info structure. */
1941 #define elf_aarch64_hash_table(info) \
1942 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1944 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1945 ((struct elf_aarch64_stub_hash_entry *) \
1946 bfd_hash_lookup ((table), (string), (create), (copy)))
1948 /* AArch64 ELF linker hash table. */
1949 struct elf_aarch64_link_hash_table
1951 /* The main hash table. */
1952 struct elf_link_hash_table root;
1954 /* Nonzero to force PIC branch veneers. */
1957 /* Fix erratum 835769. */
1958 int fix_erratum_835769;
1960 /* Fix erratum 843419. */
1961 int fix_erratum_843419;
1963 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
1964 int fix_erratum_843419_adr;
1966 /* The number of bytes in the initial entry in the PLT. */
1967 bfd_size_type plt_header_size;
1969 /* The number of bytes in the subsequent PLT etries. */
1970 bfd_size_type plt_entry_size;
1972 /* Short-cuts to get to dynamic linker sections. */
1976 /* Small local sym cache. */
1977 struct sym_cache sym_cache;
1979 /* For convenience in allocate_dynrelocs. */
1982 /* The amount of space used by the reserved portion of the sgotplt
1983 section, plus whatever space is used by the jump slots. */
1984 bfd_vma sgotplt_jump_table_size;
1986 /* The stub hash table. */
1987 struct bfd_hash_table stub_hash_table;
1989 /* Linker stub bfd. */
1992 /* Linker call-backs. */
1993 asection *(*add_stub_section) (const char *, asection *);
1994 void (*layout_sections_again) (void);
1996 /* Array to keep track of which stub sections have been created, and
1997 information on stub grouping. */
2000 /* This is the section to which stubs in the group will be
2003 /* The stub section. */
2007 /* Assorted information used by elfNN_aarch64_size_stubs. */
2008 unsigned int bfd_count;
2010 asection **input_list;
2012 /* The offset into splt of the PLT entry for the TLS descriptor
2013 resolver. Special values are 0, if not necessary (or not found
2014 to be necessary yet), and -1 if needed but not determined
2016 bfd_vma tlsdesc_plt;
2018 /* The GOT offset for the lazy trampoline. Communicated to the
2019 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
2020 indicates an offset is not allocated. */
2021 bfd_vma dt_tlsdesc_got;
2023 /* Used by local STT_GNU_IFUNC symbols. */
2024 htab_t loc_hash_table;
2025 void * loc_hash_memory;
2028 /* Create an entry in an AArch64 ELF linker hash table. */
2030 static struct bfd_hash_entry *
2031 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
2032 struct bfd_hash_table *table,
2035 struct elf_aarch64_link_hash_entry *ret =
2036 (struct elf_aarch64_link_hash_entry *) entry;
2038 /* Allocate the structure if it has not already been allocated by a
2041 ret = bfd_hash_allocate (table,
2042 sizeof (struct elf_aarch64_link_hash_entry));
2044 return (struct bfd_hash_entry *) ret;
2046 /* Call the allocation method of the superclass. */
2047 ret = ((struct elf_aarch64_link_hash_entry *)
2048 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2052 ret->dyn_relocs = NULL;
2053 ret->got_type = GOT_UNKNOWN;
2054 ret->plt_got_offset = (bfd_vma) - 1;
2055 ret->stub_cache = NULL;
2056 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
2059 return (struct bfd_hash_entry *) ret;
2062 /* Initialize an entry in the stub hash table. */
2064 static struct bfd_hash_entry *
2065 stub_hash_newfunc (struct bfd_hash_entry *entry,
2066 struct bfd_hash_table *table, const char *string)
2068 /* Allocate the structure if it has not already been allocated by a
2072 entry = bfd_hash_allocate (table,
2074 elf_aarch64_stub_hash_entry));
2079 /* Call the allocation method of the superclass. */
2080 entry = bfd_hash_newfunc (entry, table, string);
2083 struct elf_aarch64_stub_hash_entry *eh;
2085 /* Initialize the local fields. */
2086 eh = (struct elf_aarch64_stub_hash_entry *) entry;
2087 eh->adrp_offset = 0;
2088 eh->stub_sec = NULL;
2089 eh->stub_offset = 0;
2090 eh->target_value = 0;
2091 eh->target_section = NULL;
2092 eh->stub_type = aarch64_stub_none;
2100 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2101 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2102 as global symbol. We reuse indx and dynstr_index for local symbol
2103 hash since they aren't used by global symbols in this backend. */
2106 elfNN_aarch64_local_htab_hash (const void *ptr)
2108 struct elf_link_hash_entry *h
2109 = (struct elf_link_hash_entry *) ptr;
2110 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
2113 /* Compare local hash entries. */
2116 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
2118 struct elf_link_hash_entry *h1
2119 = (struct elf_link_hash_entry *) ptr1;
2120 struct elf_link_hash_entry *h2
2121 = (struct elf_link_hash_entry *) ptr2;
2123 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
2126 /* Find and/or create a hash entry for local symbol. */
2128 static struct elf_link_hash_entry *
2129 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
2130 bfd *abfd, const Elf_Internal_Rela *rel,
2133 struct elf_aarch64_link_hash_entry e, *ret;
2134 asection *sec = abfd->sections;
2135 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2136 ELFNN_R_SYM (rel->r_info));
2139 e.root.indx = sec->id;
2140 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2141 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2142 create ? INSERT : NO_INSERT);
2149 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2153 ret = (struct elf_aarch64_link_hash_entry *)
2154 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2155 sizeof (struct elf_aarch64_link_hash_entry));
2158 memset (ret, 0, sizeof (*ret));
2159 ret->root.indx = sec->id;
2160 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2161 ret->root.dynindx = -1;
2167 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2170 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2171 struct elf_link_hash_entry *dir,
2172 struct elf_link_hash_entry *ind)
2174 struct elf_aarch64_link_hash_entry *edir, *eind;
2176 edir = (struct elf_aarch64_link_hash_entry *) dir;
2177 eind = (struct elf_aarch64_link_hash_entry *) ind;
2179 if (eind->dyn_relocs != NULL)
2181 if (edir->dyn_relocs != NULL)
2183 struct elf_dyn_relocs **pp;
2184 struct elf_dyn_relocs *p;
2186 /* Add reloc counts against the indirect sym to the direct sym
2187 list. Merge any entries against the same section. */
2188 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2190 struct elf_dyn_relocs *q;
2192 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2193 if (q->sec == p->sec)
2195 q->pc_count += p->pc_count;
2196 q->count += p->count;
2203 *pp = edir->dyn_relocs;
2206 edir->dyn_relocs = eind->dyn_relocs;
2207 eind->dyn_relocs = NULL;
2210 if (ind->root.type == bfd_link_hash_indirect)
2212 /* Copy over PLT info. */
2213 if (dir->got.refcount <= 0)
2215 edir->got_type = eind->got_type;
2216 eind->got_type = GOT_UNKNOWN;
2220 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2223 /* Destroy an AArch64 elf linker hash table. */
2226 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2228 struct elf_aarch64_link_hash_table *ret
2229 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2231 if (ret->loc_hash_table)
2232 htab_delete (ret->loc_hash_table);
2233 if (ret->loc_hash_memory)
2234 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2236 bfd_hash_table_free (&ret->stub_hash_table);
2237 _bfd_elf_link_hash_table_free (obfd);
2240 /* Create an AArch64 elf linker hash table. */
2242 static struct bfd_link_hash_table *
2243 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2245 struct elf_aarch64_link_hash_table *ret;
2246 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2248 ret = bfd_zmalloc (amt);
2252 if (!_bfd_elf_link_hash_table_init
2253 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2254 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2260 ret->plt_header_size = PLT_ENTRY_SIZE;
2261 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2263 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2265 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2266 sizeof (struct elf_aarch64_stub_hash_entry)))
2268 _bfd_elf_link_hash_table_free (abfd);
2272 ret->loc_hash_table = htab_try_create (1024,
2273 elfNN_aarch64_local_htab_hash,
2274 elfNN_aarch64_local_htab_eq,
2276 ret->loc_hash_memory = objalloc_create ();
2277 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2279 elfNN_aarch64_link_hash_table_free (abfd);
2282 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2284 return &ret->root.root;
2288 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2289 bfd_vma offset, bfd_vma value)
2291 reloc_howto_type *howto;
2294 howto = elfNN_aarch64_howto_from_type (r_type);
2295 place = (input_section->output_section->vma + input_section->output_offset
2298 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2299 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2300 return _bfd_aarch64_elf_put_addend (input_bfd,
2301 input_section->contents + offset, r_type,
2305 static enum elf_aarch64_stub_type
2306 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2308 if (aarch64_valid_for_adrp_p (value, place))
2309 return aarch64_stub_adrp_branch;
2310 return aarch64_stub_long_branch;
2313 /* Determine the type of stub needed, if any, for a call. */
2315 static enum elf_aarch64_stub_type
2316 aarch64_type_of_stub (struct bfd_link_info *info,
2317 asection *input_sec,
2318 const Elf_Internal_Rela *rel,
2320 unsigned char st_type,
2321 struct elf_aarch64_link_hash_entry *hash,
2322 bfd_vma destination)
2325 bfd_signed_vma branch_offset;
2326 unsigned int r_type;
2327 struct elf_aarch64_link_hash_table *globals;
2328 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2329 bfd_boolean via_plt_p;
2331 if (st_type != STT_FUNC
2332 && (sym_sec != bfd_abs_section_ptr))
2335 globals = elf_aarch64_hash_table (info);
2336 via_plt_p = (globals->root.splt != NULL && hash != NULL
2337 && hash->root.plt.offset != (bfd_vma) - 1);
2338 /* Make sure call to plt stub can fit into the branch range. */
2340 destination = (globals->root.splt->output_section->vma
2341 + globals->root.splt->output_offset
2342 + hash->root.plt.offset);
2344 /* Determine where the call point is. */
2345 location = (input_sec->output_offset
2346 + input_sec->output_section->vma + rel->r_offset);
2348 branch_offset = (bfd_signed_vma) (destination - location);
2350 r_type = ELFNN_R_TYPE (rel->r_info);
2352 /* We don't want to redirect any old unconditional jump in this way,
2353 only one which is being used for a sibcall, where it is
2354 acceptable for the IP0 and IP1 registers to be clobbered. */
2355 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2356 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2357 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2359 stub_type = aarch64_stub_long_branch;
2365 /* Build a name for an entry in the stub hash table. */
2368 elfNN_aarch64_stub_name (const asection *input_section,
2369 const asection *sym_sec,
2370 const struct elf_aarch64_link_hash_entry *hash,
2371 const Elf_Internal_Rela *rel)
2378 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2379 stub_name = bfd_malloc (len);
2380 if (stub_name != NULL)
2381 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2382 (unsigned int) input_section->id,
2383 hash->root.root.root.string,
2388 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2389 stub_name = bfd_malloc (len);
2390 if (stub_name != NULL)
2391 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2392 (unsigned int) input_section->id,
2393 (unsigned int) sym_sec->id,
2394 (unsigned int) ELFNN_R_SYM (rel->r_info),
2401 /* Look up an entry in the stub hash. Stub entries are cached because
2402 creating the stub name takes a bit of time. */
2404 static struct elf_aarch64_stub_hash_entry *
2405 elfNN_aarch64_get_stub_entry (const asection *input_section,
2406 const asection *sym_sec,
2407 struct elf_link_hash_entry *hash,
2408 const Elf_Internal_Rela *rel,
2409 struct elf_aarch64_link_hash_table *htab)
2411 struct elf_aarch64_stub_hash_entry *stub_entry;
2412 struct elf_aarch64_link_hash_entry *h =
2413 (struct elf_aarch64_link_hash_entry *) hash;
2414 const asection *id_sec;
2416 if ((input_section->flags & SEC_CODE) == 0)
2419 /* If this input section is part of a group of sections sharing one
2420 stub section, then use the id of the first section in the group.
2421 Stub names need to include a section id, as there may well be
2422 more than one stub used to reach say, printf, and we need to
2423 distinguish between them. */
2424 id_sec = htab->stub_group[input_section->id].link_sec;
2426 if (h != NULL && h->stub_cache != NULL
2427 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2429 stub_entry = h->stub_cache;
2435 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2436 if (stub_name == NULL)
2439 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2440 stub_name, FALSE, FALSE);
2442 h->stub_cache = stub_entry;
2451 /* Create a stub section. */
2454 _bfd_aarch64_create_stub_section (asection *section,
2455 struct elf_aarch64_link_hash_table *htab)
2461 namelen = strlen (section->name);
2462 len = namelen + sizeof (STUB_SUFFIX);
2463 s_name = bfd_alloc (htab->stub_bfd, len);
2467 memcpy (s_name, section->name, namelen);
2468 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2469 return (*htab->add_stub_section) (s_name, section);
2473 /* Find or create a stub section for a link section.
2475 Fix or create the stub section used to collect stubs attached to
2476 the specified link section. */
2479 _bfd_aarch64_get_stub_for_link_section (asection *link_section,
2480 struct elf_aarch64_link_hash_table *htab)
2482 if (htab->stub_group[link_section->id].stub_sec == NULL)
2483 htab->stub_group[link_section->id].stub_sec
2484 = _bfd_aarch64_create_stub_section (link_section, htab);
2485 return htab->stub_group[link_section->id].stub_sec;
2489 /* Find or create a stub section in the stub group for an input
2493 _bfd_aarch64_create_or_find_stub_sec (asection *section,
2494 struct elf_aarch64_link_hash_table *htab)
2496 asection *link_sec = htab->stub_group[section->id].link_sec;
2497 return _bfd_aarch64_get_stub_for_link_section (link_sec, htab);
2501 /* Add a new stub entry in the stub group associated with an input
2502 section to the stub hash. Not all fields of the new stub entry are
2505 static struct elf_aarch64_stub_hash_entry *
2506 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name,
2508 struct elf_aarch64_link_hash_table *htab)
2512 struct elf_aarch64_stub_hash_entry *stub_entry;
2514 link_sec = htab->stub_group[section->id].link_sec;
2515 stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab);
2517 /* Enter this entry into the linker stub hash table. */
2518 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2520 if (stub_entry == NULL)
2522 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2523 section->owner, stub_name);
2527 stub_entry->stub_sec = stub_sec;
2528 stub_entry->stub_offset = 0;
2529 stub_entry->id_sec = link_sec;
2534 /* Add a new stub entry in the final stub section to the stub hash.
2535 Not all fields of the new stub entry are initialised. */
2537 static struct elf_aarch64_stub_hash_entry *
2538 _bfd_aarch64_add_stub_entry_after (const char *stub_name,
2539 asection *link_section,
2540 struct elf_aarch64_link_hash_table *htab)
2543 struct elf_aarch64_stub_hash_entry *stub_entry;
2545 stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab);
2546 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2548 if (stub_entry == NULL)
2550 (*_bfd_error_handler) (_("cannot create stub entry %s"), stub_name);
2554 stub_entry->stub_sec = stub_sec;
2555 stub_entry->stub_offset = 0;
2556 stub_entry->id_sec = link_section;
2563 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2564 void *in_arg ATTRIBUTE_UNUSED)
2566 struct elf_aarch64_stub_hash_entry *stub_entry;
2571 bfd_vma veneered_insn_loc;
2572 bfd_vma veneer_entry_loc;
2573 bfd_signed_vma branch_offset = 0;
2574 unsigned int template_size;
2575 const uint32_t *template;
2578 /* Massage our args to the form they really have. */
2579 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2581 stub_sec = stub_entry->stub_sec;
2583 /* Make a note of the offset within the stubs for this entry. */
2584 stub_entry->stub_offset = stub_sec->size;
2585 loc = stub_sec->contents + stub_entry->stub_offset;
2587 stub_bfd = stub_sec->owner;
2589 /* This is the address of the stub destination. */
2590 sym_value = (stub_entry->target_value
2591 + stub_entry->target_section->output_offset
2592 + stub_entry->target_section->output_section->vma);
2594 if (stub_entry->stub_type == aarch64_stub_long_branch)
2596 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2597 + stub_sec->output_offset);
2599 /* See if we can relax the stub. */
2600 if (aarch64_valid_for_adrp_p (sym_value, place))
2601 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2604 switch (stub_entry->stub_type)
2606 case aarch64_stub_adrp_branch:
2607 template = aarch64_adrp_branch_stub;
2608 template_size = sizeof (aarch64_adrp_branch_stub);
2610 case aarch64_stub_long_branch:
2611 template = aarch64_long_branch_stub;
2612 template_size = sizeof (aarch64_long_branch_stub);
2614 case aarch64_stub_erratum_835769_veneer:
2615 template = aarch64_erratum_835769_stub;
2616 template_size = sizeof (aarch64_erratum_835769_stub);
2618 case aarch64_stub_erratum_843419_veneer:
2619 template = aarch64_erratum_843419_stub;
2620 template_size = sizeof (aarch64_erratum_843419_stub);
2626 for (i = 0; i < (template_size / sizeof template[0]); i++)
2628 bfd_putl32 (template[i], loc);
2632 template_size = (template_size + 7) & ~7;
2633 stub_sec->size += template_size;
2635 switch (stub_entry->stub_type)
2637 case aarch64_stub_adrp_branch:
2638 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2639 stub_entry->stub_offset, sym_value))
2640 /* The stub would not have been relaxed if the offset was out
2644 if (aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec,
2645 stub_entry->stub_offset + 4, sym_value))
2649 case aarch64_stub_long_branch:
2650 /* We want the value relative to the address 12 bytes back from the
2652 if (aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec,
2653 stub_entry->stub_offset + 16, sym_value + 12))
2657 case aarch64_stub_erratum_835769_veneer:
2658 veneered_insn_loc = stub_entry->target_section->output_section->vma
2659 + stub_entry->target_section->output_offset
2660 + stub_entry->target_value;
2661 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
2662 + stub_entry->stub_sec->output_offset
2663 + stub_entry->stub_offset;
2664 branch_offset = veneered_insn_loc - veneer_entry_loc;
2665 branch_offset >>= 2;
2666 branch_offset &= 0x3ffffff;
2667 bfd_putl32 (stub_entry->veneered_insn,
2668 stub_sec->contents + stub_entry->stub_offset);
2669 bfd_putl32 (template[1] | branch_offset,
2670 stub_sec->contents + stub_entry->stub_offset + 4);
2673 case aarch64_stub_erratum_843419_veneer:
2674 if (aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec,
2675 stub_entry->stub_offset + 4, sym_value + 4))
2686 /* As above, but don't actually build the stub. Just bump offset so
2687 we know stub section sizes. */
2690 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2691 void *in_arg ATTRIBUTE_UNUSED)
2693 struct elf_aarch64_stub_hash_entry *stub_entry;
2696 /* Massage our args to the form they really have. */
2697 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2699 switch (stub_entry->stub_type)
2701 case aarch64_stub_adrp_branch:
2702 size = sizeof (aarch64_adrp_branch_stub);
2704 case aarch64_stub_long_branch:
2705 size = sizeof (aarch64_long_branch_stub);
2707 case aarch64_stub_erratum_835769_veneer:
2708 size = sizeof (aarch64_erratum_835769_stub);
2710 case aarch64_stub_erratum_843419_veneer:
2711 size = sizeof (aarch64_erratum_843419_stub);
2717 size = (size + 7) & ~7;
2718 stub_entry->stub_sec->size += size;
2722 /* External entry points for sizing and building linker stubs. */
2724 /* Set up various things so that we can make a list of input sections
2725 for each output section included in the link. Returns -1 on error,
2726 0 when no stubs will be needed, and 1 on success. */
2729 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2730 struct bfd_link_info *info)
2733 unsigned int bfd_count;
2734 int top_id, top_index;
2736 asection **input_list, **list;
2738 struct elf_aarch64_link_hash_table *htab =
2739 elf_aarch64_hash_table (info);
2741 if (!is_elf_hash_table (htab))
2744 /* Count the number of input BFDs and find the top input section id. */
2745 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2746 input_bfd != NULL; input_bfd = input_bfd->link.next)
2749 for (section = input_bfd->sections;
2750 section != NULL; section = section->next)
2752 if (top_id < section->id)
2753 top_id = section->id;
2756 htab->bfd_count = bfd_count;
2758 amt = sizeof (struct map_stub) * (top_id + 1);
2759 htab->stub_group = bfd_zmalloc (amt);
2760 if (htab->stub_group == NULL)
2763 /* We can't use output_bfd->section_count here to find the top output
2764 section index as some sections may have been removed, and
2765 _bfd_strip_section_from_output doesn't renumber the indices. */
2766 for (section = output_bfd->sections, top_index = 0;
2767 section != NULL; section = section->next)
2769 if (top_index < section->index)
2770 top_index = section->index;
2773 htab->top_index = top_index;
2774 amt = sizeof (asection *) * (top_index + 1);
2775 input_list = bfd_malloc (amt);
2776 htab->input_list = input_list;
2777 if (input_list == NULL)
2780 /* For sections we aren't interested in, mark their entries with a
2781 value we can check later. */
2782 list = input_list + top_index;
2784 *list = bfd_abs_section_ptr;
2785 while (list-- != input_list);
2787 for (section = output_bfd->sections;
2788 section != NULL; section = section->next)
2790 if ((section->flags & SEC_CODE) != 0)
2791 input_list[section->index] = NULL;
2797 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2798 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2800 /* The linker repeatedly calls this function for each input section,
2801 in the order that input sections are linked into output sections.
2802 Build lists of input sections to determine groupings between which
2803 we may insert linker stubs. */
2806 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2808 struct elf_aarch64_link_hash_table *htab =
2809 elf_aarch64_hash_table (info);
2811 if (isec->output_section->index <= htab->top_index)
2813 asection **list = htab->input_list + isec->output_section->index;
2815 if (*list != bfd_abs_section_ptr)
2817 /* Steal the link_sec pointer for our list. */
2818 /* This happens to make the list in reverse order,
2819 which is what we want. */
2820 PREV_SEC (isec) = *list;
2826 /* See whether we can group stub sections together. Grouping stub
2827 sections may result in fewer stubs. More importantly, we need to
2828 put all .init* and .fini* stubs at the beginning of the .init or
2829 .fini output sections respectively, because glibc splits the
2830 _init and _fini functions into multiple parts. Putting a stub in
2831 the middle of a function is not a good idea. */
2834 group_sections (struct elf_aarch64_link_hash_table *htab,
2835 bfd_size_type stub_group_size,
2836 bfd_boolean stubs_always_before_branch)
2838 asection **list = htab->input_list + htab->top_index;
2842 asection *tail = *list;
2844 if (tail == bfd_abs_section_ptr)
2847 while (tail != NULL)
2851 bfd_size_type total;
2855 while ((prev = PREV_SEC (curr)) != NULL
2856 && ((total += curr->output_offset - prev->output_offset)
2860 /* OK, the size from the start of CURR to the end is less
2861 than stub_group_size and thus can be handled by one stub
2862 section. (Or the tail section is itself larger than
2863 stub_group_size, in which case we may be toast.)
2864 We should really be keeping track of the total size of
2865 stubs added here, as stubs contribute to the final output
2869 prev = PREV_SEC (tail);
2870 /* Set up this stub group. */
2871 htab->stub_group[tail->id].link_sec = curr;
2873 while (tail != curr && (tail = prev) != NULL);
2875 /* But wait, there's more! Input sections up to stub_group_size
2876 bytes before the stub section can be handled by it too. */
2877 if (!stubs_always_before_branch)
2881 && ((total += tail->output_offset - prev->output_offset)
2885 prev = PREV_SEC (tail);
2886 htab->stub_group[tail->id].link_sec = curr;
2892 while (list-- != htab->input_list);
2894 free (htab->input_list);
2899 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
2901 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
2902 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
2903 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
2904 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
2905 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
2906 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
2908 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
2909 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
2910 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
2911 #define AARCH64_ZR 0x1f
2913 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
2914 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
2916 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
2917 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
2918 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
2919 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
2920 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
2921 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
2922 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
2923 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
2924 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
2925 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
2926 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
2927 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
2928 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
2929 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
2930 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
2931 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
2932 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
2933 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
2935 /* Classify an INSN if it is indeed a load/store.
2937 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
2939 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
2942 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned.
2947 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
2948 bfd_boolean *pair, bfd_boolean *load)
2956 /* Bail out quickly if INSN doesn't fall into the the load-store
2958 if (!AARCH64_LDST (insn))
2963 if (AARCH64_LDST_EX (insn))
2965 *rt = AARCH64_RT (insn);
2967 if (AARCH64_BIT (insn, 21) == 1)
2970 *rt2 = AARCH64_RT2 (insn);
2972 *load = AARCH64_LD (insn);
2975 else if (AARCH64_LDST_NAP (insn)
2976 || AARCH64_LDSTP_PI (insn)
2977 || AARCH64_LDSTP_O (insn)
2978 || AARCH64_LDSTP_PRE (insn))
2981 *rt = AARCH64_RT (insn);
2982 *rt2 = AARCH64_RT2 (insn);
2983 *load = AARCH64_LD (insn);
2986 else if (AARCH64_LDST_PCREL (insn)
2987 || AARCH64_LDST_UI (insn)
2988 || AARCH64_LDST_PIIMM (insn)
2989 || AARCH64_LDST_U (insn)
2990 || AARCH64_LDST_PREIMM (insn)
2991 || AARCH64_LDST_RO (insn)
2992 || AARCH64_LDST_UIMM (insn))
2994 *rt = AARCH64_RT (insn);
2996 if (AARCH64_LDST_PCREL (insn))
2998 opc = AARCH64_BITS (insn, 22, 2);
2999 v = AARCH64_BIT (insn, 26);
3000 opc_v = opc | (v << 2);
3001 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
3002 || opc_v == 5 || opc_v == 7);
3005 else if (AARCH64_LDST_SIMD_M (insn)
3006 || AARCH64_LDST_SIMD_M_PI (insn))
3008 *rt = AARCH64_RT (insn);
3009 *load = AARCH64_BIT (insn, 22);
3010 opcode = (insn >> 12) & 0xf;
3037 else if (AARCH64_LDST_SIMD_S (insn)
3038 || AARCH64_LDST_SIMD_S_PI (insn))
3040 *rt = AARCH64_RT (insn);
3041 r = (insn >> 21) & 1;
3042 *load = AARCH64_BIT (insn, 22);
3043 opcode = (insn >> 13) & 0x7;
3055 *rt2 = *rt + (r == 0 ? 2 : 3);
3063 *rt2 = *rt + (r == 0 ? 2 : 3);
3075 /* Return TRUE if INSN is multiply-accumulate. */
3078 aarch64_mlxl_p (uint32_t insn)
3080 uint32_t op31 = AARCH64_OP31 (insn);
3082 if (AARCH64_MAC (insn)
3083 && (op31 == 0 || op31 == 1 || op31 == 5)
3084 /* Exclude MUL instructions which are encoded as a multiple accumulate
3086 && AARCH64_RA (insn) != AARCH64_ZR)
3092 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3093 it is possible for a 64-bit multiply-accumulate instruction to generate an
3094 incorrect result. The details are quite complex and hard to
3095 determine statically, since branches in the code may exist in some
3096 circumstances, but all cases end with a memory (load, store, or
3097 prefetch) instruction followed immediately by the multiply-accumulate
3098 operation. We employ a linker patching technique, by moving the potentially
3099 affected multiply-accumulate instruction into a patch region and replacing
3100 the original instruction with a branch to the patch. This function checks
3101 if INSN_1 is the memory operation followed by a multiply-accumulate
3102 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3103 if INSN_1 and INSN_2 are safe. */
3106 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
3116 if (aarch64_mlxl_p (insn_2)
3117 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
3119 /* Any SIMD memory op is independent of the subsequent MLA
3120 by definition of the erratum. */
3121 if (AARCH64_BIT (insn_1, 26))
3124 /* If not SIMD, check for integer memory ops and MLA relationship. */
3125 rn = AARCH64_RN (insn_2);
3126 ra = AARCH64_RA (insn_2);
3127 rm = AARCH64_RM (insn_2);
3129 /* If this is a load and there's a true(RAW) dependency, we are safe
3130 and this is not an erratum sequence. */
3132 (rt == rn || rt == rm || rt == ra
3133 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
3136 /* We conservatively put out stubs for all other cases (including
3144 /* Used to order a list of mapping symbols by address. */
3147 elf_aarch64_compare_mapping (const void *a, const void *b)
3149 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
3150 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
3152 if (amap->vma > bmap->vma)
3154 else if (amap->vma < bmap->vma)
3156 else if (amap->type > bmap->type)
3157 /* Ensure results do not depend on the host qsort for objects with
3158 multiple mapping symbols at the same address by sorting on type
3161 else if (amap->type < bmap->type)
3169 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes)
3171 char *stub_name = (char *) bfd_malloc
3172 (strlen ("__erratum_835769_veneer_") + 16);
3173 sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3177 /* Scan for Cortex-A53 erratum 835769 sequence.
3179 Return TRUE else FALSE on abnormal termination. */
3182 _bfd_aarch64_erratum_835769_scan (bfd *input_bfd,
3183 struct bfd_link_info *info,
3184 unsigned int *num_fixes_p)
3187 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3188 unsigned int num_fixes = *num_fixes_p;
3193 for (section = input_bfd->sections;
3195 section = section->next)
3197 bfd_byte *contents = NULL;
3198 struct _aarch64_elf_section_data *sec_data;
3201 if (elf_section_type (section) != SHT_PROGBITS
3202 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3203 || (section->flags & SEC_EXCLUDE) != 0
3204 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3205 || (section->output_section == bfd_abs_section_ptr))
3208 if (elf_section_data (section)->this_hdr.contents != NULL)
3209 contents = elf_section_data (section)->this_hdr.contents;
3210 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3213 sec_data = elf_aarch64_section_data (section);
3215 qsort (sec_data->map, sec_data->mapcount,
3216 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3218 for (span = 0; span < sec_data->mapcount; span++)
3220 unsigned int span_start = sec_data->map[span].vma;
3221 unsigned int span_end = ((span == sec_data->mapcount - 1)
3222 ? sec_data->map[0].vma + section->size
3223 : sec_data->map[span + 1].vma);
3225 char span_type = sec_data->map[span].type;
3227 if (span_type == 'd')
3230 for (i = span_start; i + 4 < span_end; i += 4)
3232 uint32_t insn_1 = bfd_getl32 (contents + i);
3233 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3235 if (aarch64_erratum_sequence (insn_1, insn_2))
3237 struct elf_aarch64_stub_hash_entry *stub_entry;
3238 char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes);
3242 stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name,
3248 stub_entry->stub_type = aarch64_stub_erratum_835769_veneer;
3249 stub_entry->target_section = section;
3250 stub_entry->target_value = i + 4;
3251 stub_entry->veneered_insn = insn_2;
3252 stub_entry->output_name = stub_name;
3257 if (elf_section_data (section)->this_hdr.contents == NULL)
3261 *num_fixes_p = num_fixes;
3267 /* Test if instruction INSN is ADRP. */
3270 _bfd_aarch64_adrp_p (uint32_t insn)
3272 return ((insn & 0x9f000000) == 0x90000000);
3276 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3279 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2,
3287 return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load)
3290 && AARCH64_LDST_UIMM (insn_3)
3291 && AARCH64_RN (insn_3) == AARCH64_RD (insn_1));
3295 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3297 Return TRUE if section CONTENTS at offset I contains one of the
3298 erratum 843419 sequences, otherwise return FALSE. If a sequence is
3299 seen set P_VENEER_I to the offset of the final LOAD/STORE
3300 instruction in the sequence.
3304 _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma,
3305 bfd_vma i, bfd_vma span_end,
3306 bfd_vma *p_veneer_i)
3308 uint32_t insn_1 = bfd_getl32 (contents + i);
3310 if (!_bfd_aarch64_adrp_p (insn_1))
3313 if (span_end < i + 12)
3316 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3317 uint32_t insn_3 = bfd_getl32 (contents + i + 8);
3319 if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc)
3322 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3))
3324 *p_veneer_i = i + 8;
3328 if (span_end < i + 16)
3331 uint32_t insn_4 = bfd_getl32 (contents + i + 12);
3333 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4))
3335 *p_veneer_i = i + 12;
3343 /* Resize all stub sections. */
3346 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab)
3350 /* OK, we've added some stubs. Find out the new size of the
3352 for (section = htab->stub_bfd->sections;
3353 section != NULL; section = section->next)
3355 /* Ignore non-stub sections. */
3356 if (!strstr (section->name, STUB_SUFFIX))
3361 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3363 for (section = htab->stub_bfd->sections;
3364 section != NULL; section = section->next)
3366 if (!strstr (section->name, STUB_SUFFIX))
3372 /* Ensure all stub sections have a size which is a multiple of
3373 4096. This is important in order to ensure that the insertion
3374 of stub sections does not in itself move existing code around
3375 in such a way that new errata sequences are created. */
3376 if (htab->fix_erratum_843419)
3378 section->size = BFD_ALIGN (section->size, 0x1000);
3383 /* Construct an erratum 843419 workaround stub name.
3387 _bfd_aarch64_erratum_843419_stub_name (asection *input_section,
3390 const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1;
3391 char *stub_name = bfd_malloc (len);
3393 if (stub_name != NULL)
3394 snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x",
3395 input_section->owner->id,
3401 /* Build a stub_entry structure describing an 843419 fixup.
3403 The stub_entry constructed is populated with the bit pattern INSN
3404 of the instruction located at OFFSET within input SECTION.
3406 Returns TRUE on success. */
3409 _bfd_aarch64_erratum_843419_fixup (uint32_t insn,
3410 bfd_vma adrp_offset,
3411 bfd_vma ldst_offset,
3413 struct bfd_link_info *info)
3415 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3417 struct elf_aarch64_stub_hash_entry *stub_entry;
3419 stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset);
3420 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3428 /* We always place an 843419 workaround veneer in the stub section
3429 attached to the input section in which an erratum sequence has
3430 been found. This ensures that later in the link process (in
3431 elfNN_aarch64_write_section) when we copy the veneered
3432 instruction from the input section into the stub section the
3433 copied instruction will have had any relocations applied to it.
3434 If we placed workaround veneers in any other stub section then we
3435 could not assume that all relocations have been processed on the
3436 corresponding input section at the point we output the stub
3440 stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab);
3441 if (stub_entry == NULL)
3447 stub_entry->adrp_offset = adrp_offset;
3448 stub_entry->target_value = ldst_offset;
3449 stub_entry->target_section = section;
3450 stub_entry->stub_type = aarch64_stub_erratum_843419_veneer;
3451 stub_entry->veneered_insn = insn;
3452 stub_entry->output_name = stub_name;
3458 /* Scan an input section looking for the signature of erratum 843419.
3460 Scans input SECTION in INPUT_BFD looking for erratum 843419
3461 signatures, for each signature found a stub_entry is created
3462 describing the location of the erratum for subsequent fixup.
3464 Return TRUE on successful scan, FALSE on failure to scan.
3468 _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section,
3469 struct bfd_link_info *info)
3471 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3476 if (elf_section_type (section) != SHT_PROGBITS
3477 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3478 || (section->flags & SEC_EXCLUDE) != 0
3479 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3480 || (section->output_section == bfd_abs_section_ptr))
3485 bfd_byte *contents = NULL;
3486 struct _aarch64_elf_section_data *sec_data;
3489 if (elf_section_data (section)->this_hdr.contents != NULL)
3490 contents = elf_section_data (section)->this_hdr.contents;
3491 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3494 sec_data = elf_aarch64_section_data (section);
3496 qsort (sec_data->map, sec_data->mapcount,
3497 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3499 for (span = 0; span < sec_data->mapcount; span++)
3501 unsigned int span_start = sec_data->map[span].vma;
3502 unsigned int span_end = ((span == sec_data->mapcount - 1)
3503 ? sec_data->map[0].vma + section->size
3504 : sec_data->map[span + 1].vma);
3506 char span_type = sec_data->map[span].type;
3508 if (span_type == 'd')
3511 for (i = span_start; i + 8 < span_end; i += 4)
3513 bfd_vma vma = (section->output_section->vma
3514 + section->output_offset
3518 if (_bfd_aarch64_erratum_843419_p
3519 (contents, vma, i, span_end, &veneer_i))
3521 uint32_t insn = bfd_getl32 (contents + veneer_i);
3523 if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i,
3530 if (elf_section_data (section)->this_hdr.contents == NULL)
3539 /* Determine and set the size of the stub section for a final link.
3541 The basic idea here is to examine all the relocations looking for
3542 PC-relative calls to a target that is unreachable with a "bl"
3546 elfNN_aarch64_size_stubs (bfd *output_bfd,
3548 struct bfd_link_info *info,
3549 bfd_signed_vma group_size,
3550 asection * (*add_stub_section) (const char *,
3552 void (*layout_sections_again) (void))
3554 bfd_size_type stub_group_size;
3555 bfd_boolean stubs_always_before_branch;
3556 bfd_boolean stub_changed = FALSE;
3557 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3558 unsigned int num_erratum_835769_fixes = 0;
3560 /* Propagate mach to stub bfd, because it may not have been
3561 finalized when we created stub_bfd. */
3562 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3563 bfd_get_mach (output_bfd));
3565 /* Stash our params away. */
3566 htab->stub_bfd = stub_bfd;
3567 htab->add_stub_section = add_stub_section;
3568 htab->layout_sections_again = layout_sections_again;
3569 stubs_always_before_branch = group_size < 0;
3571 stub_group_size = -group_size;
3573 stub_group_size = group_size;
3575 if (stub_group_size == 1)
3577 /* Default values. */
3578 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3579 stub_group_size = 127 * 1024 * 1024;
3582 group_sections (htab, stub_group_size, stubs_always_before_branch);
3584 (*htab->layout_sections_again) ();
3586 if (htab->fix_erratum_835769)
3590 for (input_bfd = info->input_bfds;
3591 input_bfd != NULL; input_bfd = input_bfd->link.next)
3592 if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info,
3593 &num_erratum_835769_fixes))
3596 _bfd_aarch64_resize_stubs (htab);
3597 (*htab->layout_sections_again) ();
3600 if (htab->fix_erratum_843419)
3604 for (input_bfd = info->input_bfds;
3606 input_bfd = input_bfd->link.next)
3610 for (section = input_bfd->sections;
3612 section = section->next)
3613 if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info))
3617 _bfd_aarch64_resize_stubs (htab);
3618 (*htab->layout_sections_again) ();
3625 for (input_bfd = info->input_bfds;
3626 input_bfd != NULL; input_bfd = input_bfd->link.next)
3628 Elf_Internal_Shdr *symtab_hdr;
3630 Elf_Internal_Sym *local_syms = NULL;
3632 /* We'll need the symbol table in a second. */
3633 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3634 if (symtab_hdr->sh_info == 0)
3637 /* Walk over each section attached to the input bfd. */
3638 for (section = input_bfd->sections;
3639 section != NULL; section = section->next)
3641 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3643 /* If there aren't any relocs, then there's nothing more
3645 if ((section->flags & SEC_RELOC) == 0
3646 || section->reloc_count == 0
3647 || (section->flags & SEC_CODE) == 0)
3650 /* If this section is a link-once section that will be
3651 discarded, then don't create any stubs. */
3652 if (section->output_section == NULL
3653 || section->output_section->owner != output_bfd)
3656 /* Get the relocs. */
3658 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3659 NULL, info->keep_memory);
3660 if (internal_relocs == NULL)
3661 goto error_ret_free_local;
3663 /* Now examine each relocation. */
3664 irela = internal_relocs;
3665 irelaend = irela + section->reloc_count;
3666 for (; irela < irelaend; irela++)
3668 unsigned int r_type, r_indx;
3669 enum elf_aarch64_stub_type stub_type;
3670 struct elf_aarch64_stub_hash_entry *stub_entry;
3673 bfd_vma destination;
3674 struct elf_aarch64_link_hash_entry *hash;
3675 const char *sym_name;
3677 const asection *id_sec;
3678 unsigned char st_type;
3681 r_type = ELFNN_R_TYPE (irela->r_info);
3682 r_indx = ELFNN_R_SYM (irela->r_info);
3684 if (r_type >= (unsigned int) R_AARCH64_end)
3686 bfd_set_error (bfd_error_bad_value);
3687 error_ret_free_internal:
3688 if (elf_section_data (section)->relocs == NULL)
3689 free (internal_relocs);
3690 goto error_ret_free_local;
3693 /* Only look for stubs on unconditional branch and
3694 branch and link instructions. */
3695 if (r_type != (unsigned int) AARCH64_R (CALL26)
3696 && r_type != (unsigned int) AARCH64_R (JUMP26))
3699 /* Now determine the call target, its name, value,
3706 if (r_indx < symtab_hdr->sh_info)
3708 /* It's a local symbol. */
3709 Elf_Internal_Sym *sym;
3710 Elf_Internal_Shdr *hdr;
3712 if (local_syms == NULL)
3715 = (Elf_Internal_Sym *) symtab_hdr->contents;
3716 if (local_syms == NULL)
3718 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3719 symtab_hdr->sh_info, 0,
3721 if (local_syms == NULL)
3722 goto error_ret_free_internal;
3725 sym = local_syms + r_indx;
3726 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3727 sym_sec = hdr->bfd_section;
3729 /* This is an undefined symbol. It can never
3733 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3734 sym_value = sym->st_value;
3735 destination = (sym_value + irela->r_addend
3736 + sym_sec->output_offset
3737 + sym_sec->output_section->vma);
3738 st_type = ELF_ST_TYPE (sym->st_info);
3740 = bfd_elf_string_from_elf_section (input_bfd,
3741 symtab_hdr->sh_link,
3748 e_indx = r_indx - symtab_hdr->sh_info;
3749 hash = ((struct elf_aarch64_link_hash_entry *)
3750 elf_sym_hashes (input_bfd)[e_indx]);
3752 while (hash->root.root.type == bfd_link_hash_indirect
3753 || hash->root.root.type == bfd_link_hash_warning)
3754 hash = ((struct elf_aarch64_link_hash_entry *)
3755 hash->root.root.u.i.link);
3757 if (hash->root.root.type == bfd_link_hash_defined
3758 || hash->root.root.type == bfd_link_hash_defweak)
3760 struct elf_aarch64_link_hash_table *globals =
3761 elf_aarch64_hash_table (info);
3762 sym_sec = hash->root.root.u.def.section;
3763 sym_value = hash->root.root.u.def.value;
3764 /* For a destination in a shared library,
3765 use the PLT stub as target address to
3766 decide whether a branch stub is
3768 if (globals->root.splt != NULL && hash != NULL
3769 && hash->root.plt.offset != (bfd_vma) - 1)
3771 sym_sec = globals->root.splt;
3772 sym_value = hash->root.plt.offset;
3773 if (sym_sec->output_section != NULL)
3774 destination = (sym_value
3775 + sym_sec->output_offset
3777 sym_sec->output_section->vma);
3779 else if (sym_sec->output_section != NULL)
3780 destination = (sym_value + irela->r_addend
3781 + sym_sec->output_offset
3782 + sym_sec->output_section->vma);
3784 else if (hash->root.root.type == bfd_link_hash_undefined
3785 || (hash->root.root.type
3786 == bfd_link_hash_undefweak))
3788 /* For a shared library, use the PLT stub as
3789 target address to decide whether a long
3790 branch stub is needed.
3791 For absolute code, they cannot be handled. */
3792 struct elf_aarch64_link_hash_table *globals =
3793 elf_aarch64_hash_table (info);
3795 if (globals->root.splt != NULL && hash != NULL
3796 && hash->root.plt.offset != (bfd_vma) - 1)
3798 sym_sec = globals->root.splt;
3799 sym_value = hash->root.plt.offset;
3800 if (sym_sec->output_section != NULL)
3801 destination = (sym_value
3802 + sym_sec->output_offset
3804 sym_sec->output_section->vma);
3811 bfd_set_error (bfd_error_bad_value);
3812 goto error_ret_free_internal;
3814 st_type = ELF_ST_TYPE (hash->root.type);
3815 sym_name = hash->root.root.root.string;
3818 /* Determine what (if any) linker stub is needed. */
3819 stub_type = aarch64_type_of_stub
3820 (info, section, irela, sym_sec, st_type, hash, destination);
3821 if (stub_type == aarch64_stub_none)
3824 /* Support for grouping stub sections. */
3825 id_sec = htab->stub_group[section->id].link_sec;
3827 /* Get the name of this stub. */
3828 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
3831 goto error_ret_free_internal;
3834 aarch64_stub_hash_lookup (&htab->stub_hash_table,
3835 stub_name, FALSE, FALSE);
3836 if (stub_entry != NULL)
3838 /* The proper stub has already been created. */
3843 stub_entry = _bfd_aarch64_add_stub_entry_in_group
3844 (stub_name, section, htab);
3845 if (stub_entry == NULL)
3848 goto error_ret_free_internal;
3851 stub_entry->target_value = sym_value;
3852 stub_entry->target_section = sym_sec;
3853 stub_entry->stub_type = stub_type;
3854 stub_entry->h = hash;
3855 stub_entry->st_type = st_type;
3857 if (sym_name == NULL)
3858 sym_name = "unnamed";
3859 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
3860 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
3861 if (stub_entry->output_name == NULL)
3864 goto error_ret_free_internal;
3867 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
3870 stub_changed = TRUE;
3873 /* We're done with the internal relocs, free them. */
3874 if (elf_section_data (section)->relocs == NULL)
3875 free (internal_relocs);
3882 _bfd_aarch64_resize_stubs (htab);
3884 /* Ask the linker to do its stuff. */
3885 (*htab->layout_sections_again) ();
3886 stub_changed = FALSE;
3891 error_ret_free_local:
3895 /* Build all the stubs associated with the current output file. The
3896 stubs are kept in a hash table attached to the main linker hash
3897 table. We also set up the .plt entries for statically linked PIC
3898 functions here. This function is called via aarch64_elf_finish in the
3902 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
3905 struct bfd_hash_table *table;
3906 struct elf_aarch64_link_hash_table *htab;
3908 htab = elf_aarch64_hash_table (info);
3910 for (stub_sec = htab->stub_bfd->sections;
3911 stub_sec != NULL; stub_sec = stub_sec->next)
3915 /* Ignore non-stub sections. */
3916 if (!strstr (stub_sec->name, STUB_SUFFIX))
3919 /* Allocate memory to hold the linker stubs. */
3920 size = stub_sec->size;
3921 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3922 if (stub_sec->contents == NULL && size != 0)
3926 bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents);
3927 stub_sec->size += 4;
3930 /* Build the stubs as directed by the stub hash table. */
3931 table = &htab->stub_hash_table;
3932 bfd_hash_traverse (table, aarch64_build_one_stub, info);
3938 /* Add an entry to the code/data map for section SEC. */
3941 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
3943 struct _aarch64_elf_section_data *sec_data =
3944 elf_aarch64_section_data (sec);
3945 unsigned int newidx;
3947 if (sec_data->map == NULL)
3949 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
3950 sec_data->mapcount = 0;
3951 sec_data->mapsize = 1;
3954 newidx = sec_data->mapcount++;
3956 if (sec_data->mapcount > sec_data->mapsize)
3958 sec_data->mapsize *= 2;
3959 sec_data->map = bfd_realloc_or_free
3960 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
3965 sec_data->map[newidx].vma = vma;
3966 sec_data->map[newidx].type = type;
3971 /* Initialise maps of insn/data for input BFDs. */
3973 bfd_elfNN_aarch64_init_maps (bfd *abfd)
3975 Elf_Internal_Sym *isymbuf;
3976 Elf_Internal_Shdr *hdr;
3977 unsigned int i, localsyms;
3979 /* Make sure that we are dealing with an AArch64 elf binary. */
3980 if (!is_aarch64_elf (abfd))
3983 if ((abfd->flags & DYNAMIC) != 0)
3986 hdr = &elf_symtab_hdr (abfd);
3987 localsyms = hdr->sh_info;
3989 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3990 should contain the number of local symbols, which should come before any
3991 global symbols. Mapping symbols are always local. */
3992 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
3994 /* No internal symbols read? Skip this BFD. */
3995 if (isymbuf == NULL)
3998 for (i = 0; i < localsyms; i++)
4000 Elf_Internal_Sym *isym = &isymbuf[i];
4001 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4004 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4006 name = bfd_elf_string_from_elf_section (abfd,
4010 if (bfd_is_aarch64_special_symbol_name
4011 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
4012 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
4017 /* Set option values needed during linking. */
4019 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
4020 struct bfd_link_info *link_info,
4022 int no_wchar_warn, int pic_veneer,
4023 int fix_erratum_835769,
4024 int fix_erratum_843419)
4026 struct elf_aarch64_link_hash_table *globals;
4028 globals = elf_aarch64_hash_table (link_info);
4029 globals->pic_veneer = pic_veneer;
4030 globals->fix_erratum_835769 = fix_erratum_835769;
4031 globals->fix_erratum_843419 = fix_erratum_843419;
4032 globals->fix_erratum_843419_adr = TRUE;
4034 BFD_ASSERT (is_aarch64_elf (output_bfd));
4035 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
4036 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
4040 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
4041 struct elf_aarch64_link_hash_table
4042 *globals, struct bfd_link_info *info,
4043 bfd_vma value, bfd *output_bfd,
4044 bfd_boolean *unresolved_reloc_p)
4046 bfd_vma off = (bfd_vma) - 1;
4047 asection *basegot = globals->root.sgot;
4048 bfd_boolean dyn = globals->root.dynamic_sections_created;
4052 BFD_ASSERT (basegot != NULL);
4053 off = h->got.offset;
4054 BFD_ASSERT (off != (bfd_vma) - 1);
4055 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
4057 && SYMBOL_REFERENCES_LOCAL (info, h))
4058 || (ELF_ST_VISIBILITY (h->other)
4059 && h->root.type == bfd_link_hash_undefweak))
4061 /* This is actually a static link, or it is a -Bsymbolic link
4062 and the symbol is defined locally. We must initialize this
4063 entry in the global offset table. Since the offset must
4064 always be a multiple of 8 (4 in the case of ILP32), we use
4065 the least significant bit to record whether we have
4066 initialized it already.
4067 When doing a dynamic link, we create a .rel(a).got relocation
4068 entry to initialize the value. This is done in the
4069 finish_dynamic_symbol routine. */
4074 bfd_put_NN (output_bfd, value, basegot->contents + off);
4079 *unresolved_reloc_p = FALSE;
4081 off = off + basegot->output_section->vma + basegot->output_offset;
4087 /* Change R_TYPE to a more efficient access model where possible,
4088 return the new reloc type. */
4090 static bfd_reloc_code_real_type
4091 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
4092 struct elf_link_hash_entry *h)
4094 bfd_boolean is_local = h == NULL;
4098 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4099 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4101 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4102 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
4104 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4106 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4109 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4111 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4112 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4114 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4115 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4117 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4118 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
4120 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4121 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
4123 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4124 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
4126 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4129 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4131 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4132 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4134 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4135 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4136 /* Instructions with these relocations will become NOPs. */
4137 return BFD_RELOC_AARCH64_NONE;
4147 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
4151 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4152 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4153 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4154 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4155 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4156 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4159 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4160 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4161 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4162 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4163 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4164 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4167 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4168 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4169 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4170 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4171 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4172 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4173 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4174 return GOT_TLSDESC_GD;
4176 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4177 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4178 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4179 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4182 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12:
4183 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4184 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4185 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4186 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4187 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4188 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4189 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4190 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4200 aarch64_can_relax_tls (bfd *input_bfd,
4201 struct bfd_link_info *info,
4202 bfd_reloc_code_real_type r_type,
4203 struct elf_link_hash_entry *h,
4204 unsigned long r_symndx)
4206 unsigned int symbol_got_type;
4207 unsigned int reloc_got_type;
4209 if (! IS_AARCH64_TLS_RELOC (r_type))
4212 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
4213 reloc_got_type = aarch64_reloc_got_type (r_type);
4215 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
4221 if (h && h->root.type == bfd_link_hash_undefweak)
4227 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4230 static bfd_reloc_code_real_type
4231 aarch64_tls_transition (bfd *input_bfd,
4232 struct bfd_link_info *info,
4233 unsigned int r_type,
4234 struct elf_link_hash_entry *h,
4235 unsigned long r_symndx)
4237 bfd_reloc_code_real_type bfd_r_type
4238 = elfNN_aarch64_bfd_reloc_from_type (r_type);
4240 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
4243 return aarch64_tls_transition_without_check (bfd_r_type, h);
4246 /* Return the base VMA address which should be subtracted from real addresses
4247 when resolving R_AARCH64_TLS_DTPREL relocation. */
4250 dtpoff_base (struct bfd_link_info *info)
4252 /* If tls_sec is NULL, we should have signalled an error already. */
4253 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4254 return elf_hash_table (info)->tls_sec->vma;
4257 /* Return the base VMA address which should be subtracted from real addresses
4258 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4261 tpoff_base (struct bfd_link_info *info)
4263 struct elf_link_hash_table *htab = elf_hash_table (info);
4265 /* If tls_sec is NULL, we should have signalled an error already. */
4266 BFD_ASSERT (htab->tls_sec != NULL);
4268 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
4269 htab->tls_sec->alignment_power);
4270 return htab->tls_sec->vma - base;
4274 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4275 unsigned long r_symndx)
4277 /* Calculate the address of the GOT entry for symbol
4278 referred to in h. */
4280 return &h->got.offset;
4284 struct elf_aarch64_local_symbol *l;
4286 l = elf_aarch64_locals (input_bfd);
4287 return &l[r_symndx].got_offset;
4292 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4293 unsigned long r_symndx)
4296 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
4301 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
4302 unsigned long r_symndx)
4305 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4310 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4311 unsigned long r_symndx)
4314 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4320 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4321 unsigned long r_symndx)
4323 /* Calculate the address of the GOT entry for symbol
4324 referred to in h. */
4327 struct elf_aarch64_link_hash_entry *eh;
4328 eh = (struct elf_aarch64_link_hash_entry *) h;
4329 return &eh->tlsdesc_got_jump_table_offset;
4334 struct elf_aarch64_local_symbol *l;
4336 l = elf_aarch64_locals (input_bfd);
4337 return &l[r_symndx].tlsdesc_got_jump_table_offset;
4342 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4343 unsigned long r_symndx)
4346 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4351 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
4352 struct elf_link_hash_entry *h,
4353 unsigned long r_symndx)
4356 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4361 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4362 unsigned long r_symndx)
4365 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4370 /* Data for make_branch_to_erratum_835769_stub(). */
4372 struct erratum_835769_branch_to_stub_data
4374 struct bfd_link_info *info;
4375 asection *output_section;
4379 /* Helper to insert branches to erratum 835769 stubs in the right
4380 places for a particular section. */
4383 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
4386 struct elf_aarch64_stub_hash_entry *stub_entry;
4387 struct erratum_835769_branch_to_stub_data *data;
4389 unsigned long branch_insn = 0;
4390 bfd_vma veneered_insn_loc, veneer_entry_loc;
4391 bfd_signed_vma branch_offset;
4392 unsigned int target;
4395 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4396 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
4398 if (stub_entry->target_section != data->output_section
4399 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
4402 contents = data->contents;
4403 veneered_insn_loc = stub_entry->target_section->output_section->vma
4404 + stub_entry->target_section->output_offset
4405 + stub_entry->target_value;
4406 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4407 + stub_entry->stub_sec->output_offset
4408 + stub_entry->stub_offset;
4409 branch_offset = veneer_entry_loc - veneered_insn_loc;
4411 abfd = stub_entry->target_section->owner;
4412 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4413 (*_bfd_error_handler)
4414 (_("%B: error: Erratum 835769 stub out "
4415 "of range (input file too large)"), abfd);
4417 target = stub_entry->target_value;
4418 branch_insn = 0x14000000;
4419 branch_offset >>= 2;
4420 branch_offset &= 0x3ffffff;
4421 branch_insn |= branch_offset;
4422 bfd_putl32 (branch_insn, &contents[target]);
4429 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry,
4432 struct elf_aarch64_stub_hash_entry *stub_entry
4433 = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4434 struct erratum_835769_branch_to_stub_data *data
4435 = (struct erratum_835769_branch_to_stub_data *) in_arg;
4436 struct bfd_link_info *info;
4437 struct elf_aarch64_link_hash_table *htab;
4445 contents = data->contents;
4446 section = data->output_section;
4448 htab = elf_aarch64_hash_table (info);
4450 if (stub_entry->target_section != section
4451 || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer)
4454 insn = bfd_getl32 (contents + stub_entry->target_value);
4456 stub_entry->stub_sec->contents + stub_entry->stub_offset);
4458 place = (section->output_section->vma + section->output_offset
4459 + stub_entry->adrp_offset);
4460 insn = bfd_getl32 (contents + stub_entry->adrp_offset);
4462 if ((insn & AARCH64_ADRP_OP_MASK) != AARCH64_ADRP_OP)
4465 bfd_signed_vma imm =
4466 (_bfd_aarch64_sign_extend
4467 ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33)
4470 if (htab->fix_erratum_843419_adr
4471 && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM))
4473 insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm)
4474 | AARCH64_RT (insn));
4475 bfd_putl32 (insn, contents + stub_entry->adrp_offset);
4479 bfd_vma veneered_insn_loc;
4480 bfd_vma veneer_entry_loc;
4481 bfd_signed_vma branch_offset;
4482 uint32_t branch_insn;
4484 veneered_insn_loc = stub_entry->target_section->output_section->vma
4485 + stub_entry->target_section->output_offset
4486 + stub_entry->target_value;
4487 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4488 + stub_entry->stub_sec->output_offset
4489 + stub_entry->stub_offset;
4490 branch_offset = veneer_entry_loc - veneered_insn_loc;
4492 abfd = stub_entry->target_section->owner;
4493 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4494 (*_bfd_error_handler)
4495 (_("%B: error: Erratum 843419 stub out "
4496 "of range (input file too large)"), abfd);
4498 branch_insn = 0x14000000;
4499 branch_offset >>= 2;
4500 branch_offset &= 0x3ffffff;
4501 branch_insn |= branch_offset;
4502 bfd_putl32 (branch_insn, contents + stub_entry->target_value);
4509 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
4510 struct bfd_link_info *link_info,
4515 struct elf_aarch64_link_hash_table *globals =
4516 elf_aarch64_hash_table (link_info);
4518 if (globals == NULL)
4521 /* Fix code to point to erratum 835769 stubs. */
4522 if (globals->fix_erratum_835769)
4524 struct erratum_835769_branch_to_stub_data data;
4526 data.info = link_info;
4527 data.output_section = sec;
4528 data.contents = contents;
4529 bfd_hash_traverse (&globals->stub_hash_table,
4530 make_branch_to_erratum_835769_stub, &data);
4533 if (globals->fix_erratum_843419)
4535 struct erratum_835769_branch_to_stub_data data;
4537 data.info = link_info;
4538 data.output_section = sec;
4539 data.contents = contents;
4540 bfd_hash_traverse (&globals->stub_hash_table,
4541 _bfd_aarch64_erratum_843419_branch_to_stub, &data);
4547 /* Perform a relocation as part of a final link. */
4548 static bfd_reloc_status_type
4549 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
4552 asection *input_section,
4554 Elf_Internal_Rela *rel,
4556 struct bfd_link_info *info,
4558 struct elf_link_hash_entry *h,
4559 bfd_boolean *unresolved_reloc_p,
4560 bfd_boolean save_addend,
4561 bfd_vma *saved_addend,
4562 Elf_Internal_Sym *sym)
4564 Elf_Internal_Shdr *symtab_hdr;
4565 unsigned int r_type = howto->type;
4566 bfd_reloc_code_real_type bfd_r_type
4567 = elfNN_aarch64_bfd_reloc_from_howto (howto);
4568 bfd_reloc_code_real_type new_bfd_r_type;
4569 unsigned long r_symndx;
4570 bfd_byte *hit_data = contents + rel->r_offset;
4572 bfd_signed_vma signed_addend;
4573 struct elf_aarch64_link_hash_table *globals;
4574 bfd_boolean weak_undef_p;
4577 globals = elf_aarch64_hash_table (info);
4579 symtab_hdr = &elf_symtab_hdr (input_bfd);
4581 BFD_ASSERT (is_aarch64_elf (input_bfd));
4583 r_symndx = ELFNN_R_SYM (rel->r_info);
4585 /* It is possible to have linker relaxations on some TLS access
4586 models. Update our information here. */
4587 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
4588 if (new_bfd_r_type != bfd_r_type)
4590 bfd_r_type = new_bfd_r_type;
4591 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4592 BFD_ASSERT (howto != NULL);
4593 r_type = howto->type;
4596 place = input_section->output_section->vma
4597 + input_section->output_offset + rel->r_offset;
4599 /* Get addend, accumulating the addend for consecutive relocs
4600 which refer to the same offset. */
4601 signed_addend = saved_addend ? *saved_addend : 0;
4602 signed_addend += rel->r_addend;
4604 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
4605 : bfd_is_und_section (sym_sec));
4607 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4608 it here if it is defined in a non-shared object. */
4610 && h->type == STT_GNU_IFUNC
4617 if ((input_section->flags & SEC_ALLOC) == 0
4618 || h->plt.offset == (bfd_vma) -1)
4621 /* STT_GNU_IFUNC symbol must go through PLT. */
4622 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
4623 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
4628 if (h->root.root.string)
4629 name = h->root.root.string;
4631 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4633 (*_bfd_error_handler)
4634 (_("%B: relocation %s against STT_GNU_IFUNC "
4635 "symbol `%s' isn't handled by %s"), input_bfd,
4636 howto->name, name, __FUNCTION__);
4637 bfd_set_error (bfd_error_bad_value);
4640 case BFD_RELOC_AARCH64_NN:
4641 if (rel->r_addend != 0)
4643 if (h->root.root.string)
4644 name = h->root.root.string;
4646 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4648 (*_bfd_error_handler)
4649 (_("%B: relocation %s against STT_GNU_IFUNC "
4650 "symbol `%s' has non-zero addend: %d"),
4651 input_bfd, howto->name, name, rel->r_addend);
4652 bfd_set_error (bfd_error_bad_value);
4656 /* Generate dynamic relocation only when there is a
4657 non-GOT reference in a shared object. */
4658 if (info->shared && h->non_got_ref)
4660 Elf_Internal_Rela outrel;
4663 /* Need a dynamic relocation to get the real function
4665 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4669 if (outrel.r_offset == (bfd_vma) -1
4670 || outrel.r_offset == (bfd_vma) -2)
4673 outrel.r_offset += (input_section->output_section->vma
4674 + input_section->output_offset);
4676 if (h->dynindx == -1
4678 || info->executable)
4680 /* This symbol is resolved locally. */
4681 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
4682 outrel.r_addend = (h->root.u.def.value
4683 + h->root.u.def.section->output_section->vma
4684 + h->root.u.def.section->output_offset);
4688 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4689 outrel.r_addend = 0;
4692 sreloc = globals->root.irelifunc;
4693 elf_append_rela (output_bfd, sreloc, &outrel);
4695 /* If this reloc is against an external symbol, we
4696 do not want to fiddle with the addend. Otherwise,
4697 we need to include the symbol value so that it
4698 becomes an addend for the dynamic reloc. For an
4699 internal symbol, we have updated addend. */
4700 return bfd_reloc_ok;
4703 case BFD_RELOC_AARCH64_CALL26:
4704 case BFD_RELOC_AARCH64_JUMP26:
4705 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4708 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4710 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4711 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4712 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4713 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4714 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4715 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4716 base_got = globals->root.sgot;
4717 off = h->got.offset;
4719 if (base_got == NULL)
4722 if (off == (bfd_vma) -1)
4726 /* We can't use h->got.offset here to save state, or
4727 even just remember the offset, as finish_dynamic_symbol
4728 would use that as offset into .got. */
4730 if (globals->root.splt != NULL)
4732 plt_index = ((h->plt.offset - globals->plt_header_size) /
4733 globals->plt_entry_size);
4734 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4735 base_got = globals->root.sgotplt;
4739 plt_index = h->plt.offset / globals->plt_entry_size;
4740 off = plt_index * GOT_ENTRY_SIZE;
4741 base_got = globals->root.igotplt;
4744 if (h->dynindx == -1
4748 /* This references the local definition. We must
4749 initialize this entry in the global offset table.
4750 Since the offset must always be a multiple of 8,
4751 we use the least significant bit to record
4752 whether we have initialized it already.
4754 When doing a dynamic link, we create a .rela.got
4755 relocation entry to initialize the value. This
4756 is done in the finish_dynamic_symbol routine. */
4761 bfd_put_NN (output_bfd, value,
4762 base_got->contents + off);
4763 /* Note that this is harmless as -1 | 1 still is -1. */
4767 value = (base_got->output_section->vma
4768 + base_got->output_offset + off);
4771 value = aarch64_calculate_got_entry_vma (h, globals, info,
4773 unresolved_reloc_p);
4774 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
4775 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
4776 addend = (globals->root.sgot->output_section->vma
4777 + globals->root.sgot->output_offset);
4778 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4779 addend, weak_undef_p);
4780 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
4781 case BFD_RELOC_AARCH64_ADD_LO12:
4782 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4789 case BFD_RELOC_AARCH64_NONE:
4790 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4791 *unresolved_reloc_p = FALSE;
4792 return bfd_reloc_ok;
4794 case BFD_RELOC_AARCH64_NN:
4796 /* When generating a shared object or relocatable executable, these
4797 relocations are copied into the output file to be resolved at
4799 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
4800 && (input_section->flags & SEC_ALLOC)
4802 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4803 || h->root.type != bfd_link_hash_undefweak))
4805 Elf_Internal_Rela outrel;
4807 bfd_boolean skip, relocate;
4810 *unresolved_reloc_p = FALSE;
4815 outrel.r_addend = signed_addend;
4817 _bfd_elf_section_offset (output_bfd, info, input_section,
4819 if (outrel.r_offset == (bfd_vma) - 1)
4821 else if (outrel.r_offset == (bfd_vma) - 2)
4827 outrel.r_offset += (input_section->output_section->vma
4828 + input_section->output_offset);
4831 memset (&outrel, 0, sizeof outrel);
4834 && (!info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular))
4835 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4840 /* On SVR4-ish systems, the dynamic loader cannot
4841 relocate the text and data segments independently,
4842 so the symbol does not matter. */
4844 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
4845 outrel.r_addend += value;
4848 sreloc = elf_section_data (input_section)->sreloc;
4849 if (sreloc == NULL || sreloc->contents == NULL)
4850 return bfd_reloc_notsupported;
4852 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
4853 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4855 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
4857 /* Sanity to check that we have previously allocated
4858 sufficient space in the relocation section for the
4859 number of relocations we actually want to emit. */
4863 /* If this reloc is against an external symbol, we do not want to
4864 fiddle with the addend. Otherwise, we need to include the symbol
4865 value so that it becomes an addend for the dynamic reloc. */
4867 return bfd_reloc_ok;
4869 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4870 contents, rel->r_offset, value,
4874 value += signed_addend;
4877 case BFD_RELOC_AARCH64_CALL26:
4878 case BFD_RELOC_AARCH64_JUMP26:
4880 asection *splt = globals->root.splt;
4881 bfd_boolean via_plt_p =
4882 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
4884 /* A call to an undefined weak symbol is converted to a jump to
4885 the next instruction unless a PLT entry will be created.
4886 The jump to the next instruction is optimized as a NOP.
4887 Do the same for local undefined symbols. */
4888 if (weak_undef_p && ! via_plt_p)
4890 bfd_putl32 (INSN_NOP, hit_data);
4891 return bfd_reloc_ok;
4894 /* If the call goes through a PLT entry, make sure to
4895 check distance to the right destination address. */
4897 value = (splt->output_section->vma
4898 + splt->output_offset + h->plt.offset);
4900 /* Check if a stub has to be inserted because the destination
4902 struct elf_aarch64_stub_hash_entry *stub_entry = NULL;
4903 if (! aarch64_valid_branch_p (value, place))
4904 /* The target is out of reach, so redirect the branch to
4905 the local stub for this function. */
4906 stub_entry = elfNN_aarch64_get_stub_entry (input_section, sym_sec, h,
4908 if (stub_entry != NULL)
4909 value = (stub_entry->stub_offset
4910 + stub_entry->stub_sec->output_offset
4911 + stub_entry->stub_sec->output_section->vma);
4913 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4914 signed_addend, weak_undef_p);
4915 *unresolved_reloc_p = FALSE;
4918 case BFD_RELOC_AARCH64_16_PCREL:
4919 case BFD_RELOC_AARCH64_32_PCREL:
4920 case BFD_RELOC_AARCH64_64_PCREL:
4921 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4922 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4923 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4924 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
4926 && (input_section->flags & SEC_ALLOC) != 0
4927 && (input_section->flags & SEC_READONLY) != 0
4931 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
4933 (*_bfd_error_handler)
4934 (_("%B: relocation %s against external symbol `%s' can not be used"
4935 " when making a shared object; recompile with -fPIC"),
4936 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
4937 h->root.root.string);
4938 bfd_set_error (bfd_error_bad_value);
4942 case BFD_RELOC_AARCH64_16:
4944 case BFD_RELOC_AARCH64_32:
4946 case BFD_RELOC_AARCH64_ADD_LO12:
4947 case BFD_RELOC_AARCH64_BRANCH19:
4948 case BFD_RELOC_AARCH64_LDST128_LO12:
4949 case BFD_RELOC_AARCH64_LDST16_LO12:
4950 case BFD_RELOC_AARCH64_LDST32_LO12:
4951 case BFD_RELOC_AARCH64_LDST64_LO12:
4952 case BFD_RELOC_AARCH64_LDST8_LO12:
4953 case BFD_RELOC_AARCH64_MOVW_G0:
4954 case BFD_RELOC_AARCH64_MOVW_G0_NC:
4955 case BFD_RELOC_AARCH64_MOVW_G0_S:
4956 case BFD_RELOC_AARCH64_MOVW_G1:
4957 case BFD_RELOC_AARCH64_MOVW_G1_NC:
4958 case BFD_RELOC_AARCH64_MOVW_G1_S:
4959 case BFD_RELOC_AARCH64_MOVW_G2:
4960 case BFD_RELOC_AARCH64_MOVW_G2_NC:
4961 case BFD_RELOC_AARCH64_MOVW_G2_S:
4962 case BFD_RELOC_AARCH64_MOVW_G3:
4963 case BFD_RELOC_AARCH64_TSTBR14:
4964 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4965 signed_addend, weak_undef_p);
4968 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4969 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4970 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4971 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4972 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4973 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4974 if (globals->root.sgot == NULL)
4975 BFD_ASSERT (h != NULL);
4980 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
4982 unresolved_reloc_p);
4983 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
4984 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
4985 addend = (globals->root.sgot->output_section->vma
4986 + globals->root.sgot->output_offset);
4987 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4988 addend, weak_undef_p);
4993 struct elf_aarch64_local_symbol *locals
4994 = elf_aarch64_locals (input_bfd);
4998 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
4999 (*_bfd_error_handler)
5000 (_("%B: Local symbol descriptor table be NULL when applying "
5001 "relocation %s against local symbol"),
5002 input_bfd, elfNN_aarch64_howto_table[howto_index].name);
5006 off = symbol_got_offset (input_bfd, h, r_symndx);
5007 base_got = globals->root.sgot;
5008 bfd_vma got_entry_addr = (base_got->output_section->vma
5009 + base_got->output_offset + off);
5011 if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5013 bfd_put_64 (output_bfd, value, base_got->contents + off);
5018 Elf_Internal_Rela outrel;
5020 /* For local symbol, we have done absolute relocation in static
5021 linking stageh. While for share library, we need to update
5022 the content of GOT entry according to the share objects
5023 loading base address. So we need to generate a
5024 R_AARCH64_RELATIVE reloc for dynamic linker. */
5025 s = globals->root.srelgot;
5029 outrel.r_offset = got_entry_addr;
5030 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
5031 outrel.r_addend = value;
5032 elf_append_rela (output_bfd, s, &outrel);
5035 symbol_got_offset_mark (input_bfd, h, r_symndx);
5038 /* Update the relocation value to GOT entry addr as we have transformed
5039 the direct data access into indirect data access through GOT. */
5040 value = got_entry_addr;
5042 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5043 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
5044 addend = base_got->output_section->vma + base_got->output_offset;
5046 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5047 addend, weak_undef_p);
5052 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5053 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5054 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5055 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5056 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5057 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5058 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5059 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
5060 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5061 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5062 if (globals->root.sgot == NULL)
5063 return bfd_reloc_notsupported;
5065 value = (symbol_got_offset (input_bfd, h, r_symndx)
5066 + globals->root.sgot->output_section->vma
5067 + globals->root.sgot->output_offset);
5069 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5071 *unresolved_reloc_p = FALSE;
5074 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12:
5075 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5076 signed_addend - dtpoff_base (info),
5080 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5081 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5082 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5083 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5084 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5085 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5086 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5087 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5088 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5089 signed_addend - tpoff_base (info),
5091 *unresolved_reloc_p = FALSE;
5094 case BFD_RELOC_AARCH64_TLSDESC_ADD:
5095 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5096 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5097 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5098 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5099 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5100 case BFD_RELOC_AARCH64_TLSDESC_LDR:
5101 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5102 if (globals->root.sgot == NULL)
5103 return bfd_reloc_notsupported;
5104 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
5105 + globals->root.sgotplt->output_section->vma
5106 + globals->root.sgotplt->output_offset
5107 + globals->sgotplt_jump_table_size);
5109 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5111 *unresolved_reloc_p = FALSE;
5115 return bfd_reloc_notsupported;
5119 *saved_addend = value;
5121 /* Only apply the final relocation in a sequence. */
5123 return bfd_reloc_continue;
5125 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
5129 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5130 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5133 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5134 is to then call final_link_relocate. Return other values in the
5137 static bfd_reloc_status_type
5138 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
5139 bfd *input_bfd, bfd_byte *contents,
5140 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
5142 bfd_boolean is_local = h == NULL;
5143 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
5146 BFD_ASSERT (globals && input_bfd && contents && rel);
5148 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
5150 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5151 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5154 /* GD->LE relaxation:
5155 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
5157 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
5159 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
5160 return bfd_reloc_continue;
5164 /* GD->IE relaxation:
5165 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5167 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5169 return bfd_reloc_continue;
5172 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5176 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5179 /* Tiny TLSDESC->LE relaxation:
5180 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
5181 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
5185 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5186 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5188 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5189 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
5190 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5192 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
5193 bfd_putl32 (0xf2800000, contents + rel->r_offset + 4);
5194 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5195 return bfd_reloc_continue;
5199 /* Tiny TLSDESC->IE relaxation:
5200 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5201 adr x0, :tlsdesc:var => nop
5205 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5206 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5208 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5209 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5211 bfd_putl32 (0x58000000, contents + rel->r_offset);
5212 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
5213 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5214 return bfd_reloc_continue;
5217 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5220 /* Tiny GD->LE relaxation:
5221 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5222 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
5223 nop => add x0, x0, #:tprel_lo12_nc:x
5226 /* First kill the tls_get_addr reloc on the bl instruction. */
5227 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5229 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
5230 bfd_putl32 (0x91400020, contents + rel->r_offset + 4);
5231 bfd_putl32 (0x91000000, contents + rel->r_offset + 8);
5233 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5234 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
5235 rel[1].r_offset = rel->r_offset + 8;
5237 /* Move the current relocation to the second instruction in
5240 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5241 AARCH64_R (TLSLE_ADD_TPREL_HI12));
5242 return bfd_reloc_continue;
5246 /* Tiny GD->IE relaxation:
5247 adr x0, :tlsgd:var => ldr x0, :gottprel:var
5248 bl __tls_get_addr => mrs x1, tpidr_el0
5249 nop => add x0, x0, x1
5252 /* First kill the tls_get_addr reloc on the bl instruction. */
5253 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5254 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5256 bfd_putl32 (0x58000000, contents + rel->r_offset);
5257 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5258 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
5259 return bfd_reloc_continue;
5262 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5263 return bfd_reloc_continue;
5265 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5268 /* GD->LE relaxation:
5269 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5271 bfd_putl32 (0xf2800000, contents + rel->r_offset);
5272 return bfd_reloc_continue;
5276 /* GD->IE relaxation:
5277 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
5279 insn = bfd_getl32 (contents + rel->r_offset);
5281 bfd_putl32 (insn, contents + rel->r_offset);
5282 return bfd_reloc_continue;
5285 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5288 /* GD->LE relaxation
5289 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
5290 bl __tls_get_addr => mrs x1, tpidr_el0
5291 nop => add x0, x1, x0
5294 /* First kill the tls_get_addr reloc on the bl instruction. */
5295 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5296 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5298 bfd_putl32 (0xf2800000, contents + rel->r_offset);
5299 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5300 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
5301 return bfd_reloc_continue;
5305 /* GD->IE relaxation
5306 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
5307 BL __tls_get_addr => mrs x1, tpidr_el0
5309 NOP => add x0, x1, x0
5312 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
5314 /* Remove the relocation on the BL instruction. */
5315 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5317 bfd_putl32 (0xf9400000, contents + rel->r_offset);
5319 /* We choose to fixup the BL and NOP instructions using the
5320 offset from the second relocation to allow flexibility in
5321 scheduling instructions between the ADD and BL. */
5322 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
5323 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
5324 return bfd_reloc_continue;
5327 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5328 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5329 /* GD->IE/LE relaxation:
5330 add x0, x0, #:tlsdesc_lo12:var => nop
5333 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
5334 return bfd_reloc_ok;
5336 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5337 /* IE->LE relaxation:
5338 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
5342 insn = bfd_getl32 (contents + rel->r_offset);
5343 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
5345 return bfd_reloc_continue;
5347 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
5348 /* IE->LE relaxation:
5349 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
5353 insn = bfd_getl32 (contents + rel->r_offset);
5354 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
5356 return bfd_reloc_continue;
5359 return bfd_reloc_continue;
5362 return bfd_reloc_ok;
5365 /* Relocate an AArch64 ELF section. */
5368 elfNN_aarch64_relocate_section (bfd *output_bfd,
5369 struct bfd_link_info *info,
5371 asection *input_section,
5373 Elf_Internal_Rela *relocs,
5374 Elf_Internal_Sym *local_syms,
5375 asection **local_sections)
5377 Elf_Internal_Shdr *symtab_hdr;
5378 struct elf_link_hash_entry **sym_hashes;
5379 Elf_Internal_Rela *rel;
5380 Elf_Internal_Rela *relend;
5382 struct elf_aarch64_link_hash_table *globals;
5383 bfd_boolean save_addend = FALSE;
5386 globals = elf_aarch64_hash_table (info);
5388 symtab_hdr = &elf_symtab_hdr (input_bfd);
5389 sym_hashes = elf_sym_hashes (input_bfd);
5392 relend = relocs + input_section->reloc_count;
5393 for (; rel < relend; rel++)
5395 unsigned int r_type;
5396 bfd_reloc_code_real_type bfd_r_type;
5397 bfd_reloc_code_real_type relaxed_bfd_r_type;
5398 reloc_howto_type *howto;
5399 unsigned long r_symndx;
5400 Elf_Internal_Sym *sym;
5402 struct elf_link_hash_entry *h;
5404 bfd_reloc_status_type r;
5407 bfd_boolean unresolved_reloc = FALSE;
5408 char *error_message = NULL;
5410 r_symndx = ELFNN_R_SYM (rel->r_info);
5411 r_type = ELFNN_R_TYPE (rel->r_info);
5413 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
5414 howto = bfd_reloc.howto;
5418 (*_bfd_error_handler)
5419 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
5420 input_bfd, input_section, r_type);
5423 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
5429 if (r_symndx < symtab_hdr->sh_info)
5431 sym = local_syms + r_symndx;
5432 sym_type = ELFNN_ST_TYPE (sym->st_info);
5433 sec = local_sections[r_symndx];
5435 /* An object file might have a reference to a local
5436 undefined symbol. This is a daft object file, but we
5437 should at least do something about it. */
5438 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
5439 && bfd_is_und_section (sec)
5440 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
5442 if (!info->callbacks->undefined_symbol
5443 (info, bfd_elf_string_from_elf_section
5444 (input_bfd, symtab_hdr->sh_link, sym->st_name),
5445 input_bfd, input_section, rel->r_offset, TRUE))
5449 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5451 /* Relocate against local STT_GNU_IFUNC symbol. */
5452 if (!info->relocatable
5453 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
5455 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
5460 /* Set STT_GNU_IFUNC symbol value. */
5461 h->root.u.def.value = sym->st_value;
5462 h->root.u.def.section = sec;
5467 bfd_boolean warned, ignored;
5469 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5470 r_symndx, symtab_hdr, sym_hashes,
5472 unresolved_reloc, warned, ignored);
5477 if (sec != NULL && discarded_section (sec))
5478 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
5479 rel, 1, relend, howto, 0, contents);
5481 if (info->relocatable)
5485 name = h->root.root.string;
5488 name = (bfd_elf_string_from_elf_section
5489 (input_bfd, symtab_hdr->sh_link, sym->st_name));
5490 if (name == NULL || *name == '\0')
5491 name = bfd_section_name (input_bfd, sec);
5495 && r_type != R_AARCH64_NONE
5496 && r_type != R_AARCH64_NULL
5498 || h->root.type == bfd_link_hash_defined
5499 || h->root.type == bfd_link_hash_defweak)
5500 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
5502 (*_bfd_error_handler)
5503 ((sym_type == STT_TLS
5504 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
5505 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
5507 input_section, (long) rel->r_offset, howto->name, name);
5510 /* We relax only if we can see that there can be a valid transition
5511 from a reloc type to another.
5512 We call elfNN_aarch64_final_link_relocate unless we're completely
5513 done, i.e., the relaxation produced the final output we want. */
5515 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
5517 if (relaxed_bfd_r_type != bfd_r_type)
5519 bfd_r_type = relaxed_bfd_r_type;
5520 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
5521 BFD_ASSERT (howto != NULL);
5522 r_type = howto->type;
5523 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
5524 unresolved_reloc = 0;
5527 r = bfd_reloc_continue;
5529 /* There may be multiple consecutive relocations for the
5530 same offset. In that case we are supposed to treat the
5531 output of each relocation as the addend for the next. */
5532 if (rel + 1 < relend
5533 && rel->r_offset == rel[1].r_offset
5534 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
5535 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
5538 save_addend = FALSE;
5540 if (r == bfd_reloc_continue)
5541 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
5542 input_section, contents, rel,
5543 relocation, info, sec,
5544 h, &unresolved_reloc,
5545 save_addend, &addend, sym);
5547 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
5549 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5550 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5551 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5552 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
5553 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5554 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5555 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5557 bfd_boolean need_relocs = FALSE;
5562 off = symbol_got_offset (input_bfd, h, r_symndx);
5563 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5566 (info->shared || indx != 0) &&
5568 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5569 || h->root.type != bfd_link_hash_undefweak);
5571 BFD_ASSERT (globals->root.srelgot != NULL);
5575 Elf_Internal_Rela rela;
5576 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
5578 rela.r_offset = globals->root.sgot->output_section->vma +
5579 globals->root.sgot->output_offset + off;
5582 loc = globals->root.srelgot->contents;
5583 loc += globals->root.srelgot->reloc_count++
5584 * RELOC_SIZE (htab);
5585 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5587 bfd_reloc_code_real_type real_type =
5588 elfNN_aarch64_bfd_reloc_from_type (r_type);
5590 if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
5591 || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
5592 || real_type == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC)
5594 /* For local dynamic, don't generate DTPREL in any case.
5595 Initialize the DTPREL slot into zero, so we get module
5596 base address when invoke runtime TLS resolver. */
5597 bfd_put_NN (output_bfd, 0,
5598 globals->root.sgot->contents + off
5603 bfd_put_NN (output_bfd,
5604 relocation - dtpoff_base (info),
5605 globals->root.sgot->contents + off
5610 /* This TLS symbol is global. We emit a
5611 relocation to fixup the tls offset at load
5614 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
5617 (globals->root.sgot->output_section->vma
5618 + globals->root.sgot->output_offset + off
5621 loc = globals->root.srelgot->contents;
5622 loc += globals->root.srelgot->reloc_count++
5623 * RELOC_SIZE (globals);
5624 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5625 bfd_put_NN (output_bfd, (bfd_vma) 0,
5626 globals->root.sgot->contents + off
5632 bfd_put_NN (output_bfd, (bfd_vma) 1,
5633 globals->root.sgot->contents + off);
5634 bfd_put_NN (output_bfd,
5635 relocation - dtpoff_base (info),
5636 globals->root.sgot->contents + off
5640 symbol_got_offset_mark (input_bfd, h, r_symndx);
5644 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5645 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
5646 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5647 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5649 bfd_boolean need_relocs = FALSE;
5654 off = symbol_got_offset (input_bfd, h, r_symndx);
5656 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5659 (info->shared || indx != 0) &&
5661 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5662 || h->root.type != bfd_link_hash_undefweak);
5664 BFD_ASSERT (globals->root.srelgot != NULL);
5668 Elf_Internal_Rela rela;
5671 rela.r_addend = relocation - dtpoff_base (info);
5675 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
5676 rela.r_offset = globals->root.sgot->output_section->vma +
5677 globals->root.sgot->output_offset + off;
5679 loc = globals->root.srelgot->contents;
5680 loc += globals->root.srelgot->reloc_count++
5681 * RELOC_SIZE (htab);
5683 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5685 bfd_put_NN (output_bfd, rela.r_addend,
5686 globals->root.sgot->contents + off);
5689 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
5690 globals->root.sgot->contents + off);
5692 symbol_got_offset_mark (input_bfd, h, r_symndx);
5696 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5697 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5698 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5699 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5700 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5701 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5702 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5703 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5706 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5707 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5708 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5709 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5710 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5711 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
5713 bfd_boolean need_relocs = FALSE;
5714 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
5715 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
5717 need_relocs = (h == NULL
5718 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5719 || h->root.type != bfd_link_hash_undefweak);
5721 BFD_ASSERT (globals->root.srelgot != NULL);
5722 BFD_ASSERT (globals->root.sgot != NULL);
5727 Elf_Internal_Rela rela;
5728 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
5731 rela.r_offset = (globals->root.sgotplt->output_section->vma
5732 + globals->root.sgotplt->output_offset
5733 + off + globals->sgotplt_jump_table_size);
5736 rela.r_addend = relocation - dtpoff_base (info);
5738 /* Allocate the next available slot in the PLT reloc
5739 section to hold our R_AARCH64_TLSDESC, the next
5740 available slot is determined from reloc_count,
5741 which we step. But note, reloc_count was
5742 artifically moved down while allocating slots for
5743 real PLT relocs such that all of the PLT relocs
5744 will fit above the initial reloc_count and the
5745 extra stuff will fit below. */
5746 loc = globals->root.srelplt->contents;
5747 loc += globals->root.srelplt->reloc_count++
5748 * RELOC_SIZE (globals);
5750 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5752 bfd_put_NN (output_bfd, (bfd_vma) 0,
5753 globals->root.sgotplt->contents + off +
5754 globals->sgotplt_jump_table_size);
5755 bfd_put_NN (output_bfd, (bfd_vma) 0,
5756 globals->root.sgotplt->contents + off +
5757 globals->sgotplt_jump_table_size +
5761 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
5772 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5773 because such sections are not SEC_ALLOC and thus ld.so will
5774 not process them. */
5775 if (unresolved_reloc
5776 && !((input_section->flags & SEC_DEBUGGING) != 0
5778 && _bfd_elf_section_offset (output_bfd, info, input_section,
5779 +rel->r_offset) != (bfd_vma) - 1)
5781 (*_bfd_error_handler)
5783 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5784 input_bfd, input_section, (long) rel->r_offset, howto->name,
5785 h->root.root.string);
5789 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
5793 case bfd_reloc_overflow:
5794 if (!(*info->callbacks->reloc_overflow)
5795 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
5796 input_bfd, input_section, rel->r_offset))
5800 case bfd_reloc_undefined:
5801 if (!((*info->callbacks->undefined_symbol)
5802 (info, name, input_bfd, input_section,
5803 rel->r_offset, TRUE)))
5807 case bfd_reloc_outofrange:
5808 error_message = _("out of range");
5811 case bfd_reloc_notsupported:
5812 error_message = _("unsupported relocation");
5815 case bfd_reloc_dangerous:
5816 /* error_message should already be set. */
5820 error_message = _("unknown error");
5824 BFD_ASSERT (error_message != NULL);
5825 if (!((*info->callbacks->reloc_dangerous)
5826 (info, error_message, input_bfd, input_section,
5837 /* Set the right machine number. */
5840 elfNN_aarch64_object_p (bfd *abfd)
5843 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
5845 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
5850 /* Function to keep AArch64 specific flags in the ELF header. */
5853 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
5855 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
5860 elf_elfheader (abfd)->e_flags = flags;
5861 elf_flags_init (abfd) = TRUE;
5867 /* Merge backend specific data from an object file to the output
5868 object file when linking. */
5871 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5875 bfd_boolean flags_compatible = TRUE;
5878 /* Check if we have the same endianess. */
5879 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5882 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
5885 /* The input BFD must have had its flags initialised. */
5886 /* The following seems bogus to me -- The flags are initialized in
5887 the assembler but I don't think an elf_flags_init field is
5888 written into the object. */
5889 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5891 in_flags = elf_elfheader (ibfd)->e_flags;
5892 out_flags = elf_elfheader (obfd)->e_flags;
5894 if (!elf_flags_init (obfd))
5896 /* If the input is the default architecture and had the default
5897 flags then do not bother setting the flags for the output
5898 architecture, instead allow future merges to do this. If no
5899 future merges ever set these flags then they will retain their
5900 uninitialised values, which surprise surprise, correspond
5901 to the default values. */
5902 if (bfd_get_arch_info (ibfd)->the_default
5903 && elf_elfheader (ibfd)->e_flags == 0)
5906 elf_flags_init (obfd) = TRUE;
5907 elf_elfheader (obfd)->e_flags = in_flags;
5909 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5910 && bfd_get_arch_info (obfd)->the_default)
5911 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
5912 bfd_get_mach (ibfd));
5917 /* Identical flags must be compatible. */
5918 if (in_flags == out_flags)
5921 /* Check to see if the input BFD actually contains any sections. If
5922 not, its flags may not have been initialised either, but it
5923 cannot actually cause any incompatiblity. Do not short-circuit
5924 dynamic objects; their section list may be emptied by
5925 elf_link_add_object_symbols.
5927 Also check to see if there are no code sections in the input.
5928 In this case there is no need to check for code specific flags.
5929 XXX - do we need to worry about floating-point format compatability
5930 in data sections ? */
5931 if (!(ibfd->flags & DYNAMIC))
5933 bfd_boolean null_input_bfd = TRUE;
5934 bfd_boolean only_data_sections = TRUE;
5936 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5938 if ((bfd_get_section_flags (ibfd, sec)
5939 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5940 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5941 only_data_sections = FALSE;
5943 null_input_bfd = FALSE;
5947 if (null_input_bfd || only_data_sections)
5951 return flags_compatible;
5954 /* Display the flags field. */
5957 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
5959 FILE *file = (FILE *) ptr;
5960 unsigned long flags;
5962 BFD_ASSERT (abfd != NULL && ptr != NULL);
5964 /* Print normal ELF private data. */
5965 _bfd_elf_print_private_bfd_data (abfd, ptr);
5967 flags = elf_elfheader (abfd)->e_flags;
5968 /* Ignore init flag - it may not be set, despite the flags field
5969 containing valid data. */
5971 /* xgettext:c-format */
5972 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5975 fprintf (file, _("<Unrecognised flag bits set>"));
5982 /* Update the got entry reference counts for the section being removed. */
5985 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
5986 struct bfd_link_info *info,
5988 const Elf_Internal_Rela * relocs)
5990 struct elf_aarch64_link_hash_table *htab;
5991 Elf_Internal_Shdr *symtab_hdr;
5992 struct elf_link_hash_entry **sym_hashes;
5993 struct elf_aarch64_local_symbol *locals;
5994 const Elf_Internal_Rela *rel, *relend;
5996 if (info->relocatable)
5999 htab = elf_aarch64_hash_table (info);
6004 elf_section_data (sec)->local_dynrel = NULL;
6006 symtab_hdr = &elf_symtab_hdr (abfd);
6007 sym_hashes = elf_sym_hashes (abfd);
6009 locals = elf_aarch64_locals (abfd);
6011 relend = relocs + sec->reloc_count;
6012 for (rel = relocs; rel < relend; rel++)
6014 unsigned long r_symndx;
6015 unsigned int r_type;
6016 struct elf_link_hash_entry *h = NULL;
6018 r_symndx = ELFNN_R_SYM (rel->r_info);
6020 if (r_symndx >= symtab_hdr->sh_info)
6023 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6024 while (h->root.type == bfd_link_hash_indirect
6025 || h->root.type == bfd_link_hash_warning)
6026 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6030 Elf_Internal_Sym *isym;
6032 /* A local symbol. */
6033 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6036 /* Check relocation against local STT_GNU_IFUNC symbol. */
6038 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
6040 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
6048 struct elf_aarch64_link_hash_entry *eh;
6049 struct elf_dyn_relocs **pp;
6050 struct elf_dyn_relocs *p;
6052 eh = (struct elf_aarch64_link_hash_entry *) h;
6054 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6057 /* Everything must go for SEC. */
6063 r_type = ELFNN_R_TYPE (rel->r_info);
6064 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
6066 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6067 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6068 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6069 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6070 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6071 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6072 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6073 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6074 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6075 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6076 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
6077 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6078 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6079 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6080 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6081 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6082 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6083 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6084 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6085 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6086 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6087 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6088 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
6089 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
6090 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
6091 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
6092 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
6093 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
6094 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
6095 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
6098 if (h->got.refcount > 0)
6099 h->got.refcount -= 1;
6101 if (h->type == STT_GNU_IFUNC)
6103 if (h->plt.refcount > 0)
6104 h->plt.refcount -= 1;
6107 else if (locals != NULL)
6109 if (locals[r_symndx].got_refcount > 0)
6110 locals[r_symndx].got_refcount -= 1;
6114 case BFD_RELOC_AARCH64_CALL26:
6115 case BFD_RELOC_AARCH64_JUMP26:
6116 /* If this is a local symbol then we resolve it
6117 directly without creating a PLT entry. */
6121 if (h->plt.refcount > 0)
6122 h->plt.refcount -= 1;
6125 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
6126 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6127 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
6128 case BFD_RELOC_AARCH64_MOVW_G0_NC:
6129 case BFD_RELOC_AARCH64_MOVW_G1_NC:
6130 case BFD_RELOC_AARCH64_MOVW_G2_NC:
6131 case BFD_RELOC_AARCH64_MOVW_G3:
6132 case BFD_RELOC_AARCH64_NN:
6133 if (h != NULL && info->executable)
6135 if (h->plt.refcount > 0)
6136 h->plt.refcount -= 1;
6148 /* Adjust a symbol defined by a dynamic object and referenced by a
6149 regular object. The current definition is in some section of the
6150 dynamic object, but we're not including those sections. We have to
6151 change the definition to something the rest of the link can
6155 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
6156 struct elf_link_hash_entry *h)
6158 struct elf_aarch64_link_hash_table *htab;
6161 /* If this is a function, put it in the procedure linkage table. We
6162 will fill in the contents of the procedure linkage table later,
6163 when we know the address of the .got section. */
6164 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
6166 if (h->plt.refcount <= 0
6167 || (h->type != STT_GNU_IFUNC
6168 && (SYMBOL_CALLS_LOCAL (info, h)
6169 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6170 && h->root.type == bfd_link_hash_undefweak))))
6172 /* This case can occur if we saw a CALL26 reloc in
6173 an input file, but the symbol wasn't referred to
6174 by a dynamic object or all references were
6175 garbage collected. In which case we can end up
6177 h->plt.offset = (bfd_vma) - 1;
6184 /* Otherwise, reset to -1. */
6185 h->plt.offset = (bfd_vma) - 1;
6188 /* If this is a weak symbol, and there is a real definition, the
6189 processor independent code will have arranged for us to see the
6190 real definition first, and we can just use the same value. */
6191 if (h->u.weakdef != NULL)
6193 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6194 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6195 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6196 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6197 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
6198 h->non_got_ref = h->u.weakdef->non_got_ref;
6202 /* If we are creating a shared library, we must presume that the
6203 only references to the symbol are via the global offset table.
6204 For such cases we need not do anything here; the relocations will
6205 be handled correctly by relocate_section. */
6209 /* If there are no references to this symbol that do not use the
6210 GOT, we don't need to generate a copy reloc. */
6211 if (!h->non_got_ref)
6214 /* If -z nocopyreloc was given, we won't generate them either. */
6215 if (info->nocopyreloc)
6221 /* We must allocate the symbol in our .dynbss section, which will
6222 become part of the .bss section of the executable. There will be
6223 an entry for this symbol in the .dynsym section. The dynamic
6224 object will contain position independent code, so all references
6225 from the dynamic object to this symbol will go through the global
6226 offset table. The dynamic linker will use the .dynsym entry to
6227 determine the address it must put in the global offset table, so
6228 both the dynamic object and the regular object will refer to the
6229 same memory location for the variable. */
6231 htab = elf_aarch64_hash_table (info);
6233 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
6234 to copy the initial value out of the dynamic object and into the
6235 runtime process image. */
6236 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6238 htab->srelbss->size += RELOC_SIZE (htab);
6244 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6249 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
6251 struct elf_aarch64_local_symbol *locals;
6252 locals = elf_aarch64_locals (abfd);
6255 locals = (struct elf_aarch64_local_symbol *)
6256 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
6259 elf_aarch64_locals (abfd) = locals;
6264 /* Create the .got section to hold the global offset table. */
6267 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
6269 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6272 struct elf_link_hash_entry *h;
6273 struct elf_link_hash_table *htab = elf_hash_table (info);
6275 /* This function may be called more than once. */
6276 s = bfd_get_linker_section (abfd, ".got");
6280 flags = bed->dynamic_sec_flags;
6282 s = bfd_make_section_anyway_with_flags (abfd,
6283 (bed->rela_plts_and_copies_p
6284 ? ".rela.got" : ".rel.got"),
6285 (bed->dynamic_sec_flags
6288 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
6292 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
6294 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
6297 htab->sgot->size += GOT_ENTRY_SIZE;
6299 if (bed->want_got_sym)
6301 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
6302 (or .got.plt) section. We don't do this in the linker script
6303 because we don't want to define the symbol if we are not creating
6304 a global offset table. */
6305 h = _bfd_elf_define_linkage_sym (abfd, info, s,
6306 "_GLOBAL_OFFSET_TABLE_");
6307 elf_hash_table (info)->hgot = h;
6312 if (bed->want_got_plt)
6314 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
6316 || !bfd_set_section_alignment (abfd, s,
6317 bed->s->log_file_align))
6322 /* The first bit of the global offset table is the header. */
6323 s->size += bed->got_header_size;
6328 /* Look through the relocs for a section during the first phase. */
6331 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
6332 asection *sec, const Elf_Internal_Rela *relocs)
6334 Elf_Internal_Shdr *symtab_hdr;
6335 struct elf_link_hash_entry **sym_hashes;
6336 const Elf_Internal_Rela *rel;
6337 const Elf_Internal_Rela *rel_end;
6340 struct elf_aarch64_link_hash_table *htab;
6342 if (info->relocatable)
6345 BFD_ASSERT (is_aarch64_elf (abfd));
6347 htab = elf_aarch64_hash_table (info);
6350 symtab_hdr = &elf_symtab_hdr (abfd);
6351 sym_hashes = elf_sym_hashes (abfd);
6353 rel_end = relocs + sec->reloc_count;
6354 for (rel = relocs; rel < rel_end; rel++)
6356 struct elf_link_hash_entry *h;
6357 unsigned long r_symndx;
6358 unsigned int r_type;
6359 bfd_reloc_code_real_type bfd_r_type;
6360 Elf_Internal_Sym *isym;
6362 r_symndx = ELFNN_R_SYM (rel->r_info);
6363 r_type = ELFNN_R_TYPE (rel->r_info);
6365 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
6367 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
6372 if (r_symndx < symtab_hdr->sh_info)
6374 /* A local symbol. */
6375 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6380 /* Check relocation against local STT_GNU_IFUNC symbol. */
6381 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
6383 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
6388 /* Fake a STT_GNU_IFUNC symbol. */
6389 h->type = STT_GNU_IFUNC;
6392 h->forced_local = 1;
6393 h->root.type = bfd_link_hash_defined;
6400 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6401 while (h->root.type == bfd_link_hash_indirect
6402 || h->root.type == bfd_link_hash_warning)
6403 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6405 /* PR15323, ref flags aren't set for references in the same
6407 h->root.non_ir_ref = 1;
6410 /* Could be done earlier, if h were already available. */
6411 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
6415 /* Create the ifunc sections for static executables. If we
6416 never see an indirect function symbol nor we are building
6417 a static executable, those sections will be empty and
6418 won't appear in output. */
6424 case BFD_RELOC_AARCH64_ADD_LO12:
6425 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6426 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6427 case BFD_RELOC_AARCH64_CALL26:
6428 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6429 case BFD_RELOC_AARCH64_JUMP26:
6430 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6431 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6432 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6433 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6434 case BFD_RELOC_AARCH64_NN:
6435 if (htab->root.dynobj == NULL)
6436 htab->root.dynobj = abfd;
6437 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
6442 /* It is referenced by a non-shared object. */
6444 h->root.non_ir_ref = 1;
6449 case BFD_RELOC_AARCH64_NN:
6451 /* We don't need to handle relocs into sections not going into
6452 the "real" output. */
6453 if ((sec->flags & SEC_ALLOC) == 0)
6461 h->plt.refcount += 1;
6462 h->pointer_equality_needed = 1;
6465 /* No need to do anything if we're not creating a shared
6471 struct elf_dyn_relocs *p;
6472 struct elf_dyn_relocs **head;
6474 /* We must copy these reloc types into the output file.
6475 Create a reloc section in dynobj and make room for
6479 if (htab->root.dynobj == NULL)
6480 htab->root.dynobj = abfd;
6482 sreloc = _bfd_elf_make_dynamic_reloc_section
6483 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
6489 /* If this is a global symbol, we count the number of
6490 relocations we need for this symbol. */
6493 struct elf_aarch64_link_hash_entry *eh;
6494 eh = (struct elf_aarch64_link_hash_entry *) h;
6495 head = &eh->dyn_relocs;
6499 /* Track dynamic relocs needed for local syms too.
6500 We really need local syms available to do this
6506 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6511 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6515 /* Beware of type punned pointers vs strict aliasing
6517 vpp = &(elf_section_data (s)->local_dynrel);
6518 head = (struct elf_dyn_relocs **) vpp;
6522 if (p == NULL || p->sec != sec)
6524 bfd_size_type amt = sizeof *p;
6525 p = ((struct elf_dyn_relocs *)
6526 bfd_zalloc (htab->root.dynobj, amt));
6539 /* RR: We probably want to keep a consistency check that
6540 there are no dangling GOT_PAGE relocs. */
6541 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6542 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6543 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6544 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6545 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6546 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6547 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6548 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6549 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6550 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6551 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
6552 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6553 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6554 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6555 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6556 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6557 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6558 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6559 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6560 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6561 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6562 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6563 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
6564 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
6565 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
6566 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
6567 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
6568 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
6569 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
6570 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
6573 unsigned old_got_type;
6575 got_type = aarch64_reloc_got_type (bfd_r_type);
6579 h->got.refcount += 1;
6580 old_got_type = elf_aarch64_hash_entry (h)->got_type;
6584 struct elf_aarch64_local_symbol *locals;
6586 if (!elfNN_aarch64_allocate_local_symbols
6587 (abfd, symtab_hdr->sh_info))
6590 locals = elf_aarch64_locals (abfd);
6591 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
6592 locals[r_symndx].got_refcount += 1;
6593 old_got_type = locals[r_symndx].got_type;
6596 /* If a variable is accessed with both general dynamic TLS
6597 methods, two slots may be created. */
6598 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
6599 got_type |= old_got_type;
6601 /* We will already have issued an error message if there
6602 is a TLS/non-TLS mismatch, based on the symbol type.
6603 So just combine any TLS types needed. */
6604 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
6605 && got_type != GOT_NORMAL)
6606 got_type |= old_got_type;
6608 /* If the symbol is accessed by both IE and GD methods, we
6609 are able to relax. Turn off the GD flag, without
6610 messing up with any other kind of TLS types that may be
6612 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
6613 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
6615 if (old_got_type != got_type)
6618 elf_aarch64_hash_entry (h)->got_type = got_type;
6621 struct elf_aarch64_local_symbol *locals;
6622 locals = elf_aarch64_locals (abfd);
6623 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
6624 locals[r_symndx].got_type = got_type;
6628 if (htab->root.dynobj == NULL)
6629 htab->root.dynobj = abfd;
6630 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
6635 case BFD_RELOC_AARCH64_MOVW_G0_NC:
6636 case BFD_RELOC_AARCH64_MOVW_G1_NC:
6637 case BFD_RELOC_AARCH64_MOVW_G2_NC:
6638 case BFD_RELOC_AARCH64_MOVW_G3:
6641 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
6642 (*_bfd_error_handler)
6643 (_("%B: relocation %s against `%s' can not be used when making "
6644 "a shared object; recompile with -fPIC"),
6645 abfd, elfNN_aarch64_howto_table[howto_index].name,
6646 (h) ? h->root.root.string : "a local symbol");
6647 bfd_set_error (bfd_error_bad_value);
6651 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
6652 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6653 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
6654 if (h != NULL && info->executable)
6656 /* If this reloc is in a read-only section, we might
6657 need a copy reloc. We can't check reliably at this
6658 stage whether the section is read-only, as input
6659 sections have not yet been mapped to output sections.
6660 Tentatively set the flag for now, and correct in
6661 adjust_dynamic_symbol. */
6663 h->plt.refcount += 1;
6664 h->pointer_equality_needed = 1;
6666 /* FIXME:: RR need to handle these in shared libraries
6667 and essentially bomb out as these being non-PIC
6668 relocations in shared libraries. */
6671 case BFD_RELOC_AARCH64_CALL26:
6672 case BFD_RELOC_AARCH64_JUMP26:
6673 /* If this is a local symbol then we resolve it
6674 directly without creating a PLT entry. */
6679 if (h->plt.refcount <= 0)
6680 h->plt.refcount = 1;
6682 h->plt.refcount += 1;
6693 /* Treat mapping symbols as special target symbols. */
6696 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
6699 return bfd_is_aarch64_special_symbol_name (sym->name,
6700 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
6703 /* This is a copy of elf_find_function () from elf.c except that
6704 AArch64 mapping symbols are ignored when looking for function names. */
6707 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6711 const char **filename_ptr,
6712 const char **functionname_ptr)
6714 const char *filename = NULL;
6715 asymbol *func = NULL;
6716 bfd_vma low_func = 0;
6719 for (p = symbols; *p != NULL; p++)
6723 q = (elf_symbol_type *) * p;
6725 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6730 filename = bfd_asymbol_name (&q->symbol);
6734 /* Skip mapping symbols. */
6735 if ((q->symbol.flags & BSF_LOCAL)
6736 && (bfd_is_aarch64_special_symbol_name
6737 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
6740 if (bfd_get_section (&q->symbol) == section
6741 && q->symbol.value >= low_func && q->symbol.value <= offset)
6743 func = (asymbol *) q;
6744 low_func = q->symbol.value;
6754 *filename_ptr = filename;
6755 if (functionname_ptr)
6756 *functionname_ptr = bfd_asymbol_name (func);
6762 /* Find the nearest line to a particular section and offset, for error
6763 reporting. This code is a duplicate of the code in elf.c, except
6764 that it uses aarch64_elf_find_function. */
6767 elfNN_aarch64_find_nearest_line (bfd *abfd,
6771 const char **filename_ptr,
6772 const char **functionname_ptr,
6773 unsigned int *line_ptr,
6774 unsigned int *discriminator_ptr)
6776 bfd_boolean found = FALSE;
6778 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6779 filename_ptr, functionname_ptr,
6780 line_ptr, discriminator_ptr,
6781 dwarf_debug_sections, 0,
6782 &elf_tdata (abfd)->dwarf2_find_line_info))
6784 if (!*functionname_ptr)
6785 aarch64_elf_find_function (abfd, symbols, section, offset,
6786 *filename_ptr ? NULL : filename_ptr,
6792 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
6793 toolchain uses DWARF1. */
6795 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6796 &found, filename_ptr,
6797 functionname_ptr, line_ptr,
6798 &elf_tdata (abfd)->line_info))
6801 if (found && (*functionname_ptr || *line_ptr))
6804 if (symbols == NULL)
6807 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
6808 filename_ptr, functionname_ptr))
6816 elfNN_aarch64_find_inliner_info (bfd *abfd,
6817 const char **filename_ptr,
6818 const char **functionname_ptr,
6819 unsigned int *line_ptr)
6822 found = _bfd_dwarf2_find_inliner_info
6823 (abfd, filename_ptr,
6824 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
6830 elfNN_aarch64_post_process_headers (bfd *abfd,
6831 struct bfd_link_info *link_info)
6833 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
6835 i_ehdrp = elf_elfheader (abfd);
6836 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
6838 _bfd_elf_post_process_headers (abfd, link_info);
6841 static enum elf_reloc_type_class
6842 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6843 const asection *rel_sec ATTRIBUTE_UNUSED,
6844 const Elf_Internal_Rela *rela)
6846 switch ((int) ELFNN_R_TYPE (rela->r_info))
6848 case AARCH64_R (RELATIVE):
6849 return reloc_class_relative;
6850 case AARCH64_R (JUMP_SLOT):
6851 return reloc_class_plt;
6852 case AARCH64_R (COPY):
6853 return reloc_class_copy;
6855 return reloc_class_normal;
6859 /* Handle an AArch64 specific section when reading an object file. This is
6860 called when bfd_section_from_shdr finds a section with an unknown
6864 elfNN_aarch64_section_from_shdr (bfd *abfd,
6865 Elf_Internal_Shdr *hdr,
6866 const char *name, int shindex)
6868 /* There ought to be a place to keep ELF backend specific flags, but
6869 at the moment there isn't one. We just keep track of the
6870 sections by their name, instead. Fortunately, the ABI gives
6871 names for all the AArch64 specific sections, so we will probably get
6873 switch (hdr->sh_type)
6875 case SHT_AARCH64_ATTRIBUTES:
6882 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6888 /* A structure used to record a list of sections, independently
6889 of the next and prev fields in the asection structure. */
6890 typedef struct section_list
6893 struct section_list *next;
6894 struct section_list *prev;
6898 /* Unfortunately we need to keep a list of sections for which
6899 an _aarch64_elf_section_data structure has been allocated. This
6900 is because it is possible for functions like elfNN_aarch64_write_section
6901 to be called on a section which has had an elf_data_structure
6902 allocated for it (and so the used_by_bfd field is valid) but
6903 for which the AArch64 extended version of this structure - the
6904 _aarch64_elf_section_data structure - has not been allocated. */
6905 static section_list *sections_with_aarch64_elf_section_data = NULL;
6908 record_section_with_aarch64_elf_section_data (asection *sec)
6910 struct section_list *entry;
6912 entry = bfd_malloc (sizeof (*entry));
6916 entry->next = sections_with_aarch64_elf_section_data;
6918 if (entry->next != NULL)
6919 entry->next->prev = entry;
6920 sections_with_aarch64_elf_section_data = entry;
6923 static struct section_list *
6924 find_aarch64_elf_section_entry (asection *sec)
6926 struct section_list *entry;
6927 static struct section_list *last_entry = NULL;
6929 /* This is a short cut for the typical case where the sections are added
6930 to the sections_with_aarch64_elf_section_data list in forward order and
6931 then looked up here in backwards order. This makes a real difference
6932 to the ld-srec/sec64k.exp linker test. */
6933 entry = sections_with_aarch64_elf_section_data;
6934 if (last_entry != NULL)
6936 if (last_entry->sec == sec)
6938 else if (last_entry->next != NULL && last_entry->next->sec == sec)
6939 entry = last_entry->next;
6942 for (; entry; entry = entry->next)
6943 if (entry->sec == sec)
6947 /* Record the entry prior to this one - it is the entry we are
6948 most likely to want to locate next time. Also this way if we
6949 have been called from
6950 unrecord_section_with_aarch64_elf_section_data () we will not
6951 be caching a pointer that is about to be freed. */
6952 last_entry = entry->prev;
6958 unrecord_section_with_aarch64_elf_section_data (asection *sec)
6960 struct section_list *entry;
6962 entry = find_aarch64_elf_section_entry (sec);
6966 if (entry->prev != NULL)
6967 entry->prev->next = entry->next;
6968 if (entry->next != NULL)
6969 entry->next->prev = entry->prev;
6970 if (entry == sections_with_aarch64_elf_section_data)
6971 sections_with_aarch64_elf_section_data = entry->next;
6980 struct bfd_link_info *info;
6983 int (*func) (void *, const char *, Elf_Internal_Sym *,
6984 asection *, struct elf_link_hash_entry *);
6985 } output_arch_syminfo;
6987 enum map_symbol_type
6994 /* Output a single mapping symbol. */
6997 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
6998 enum map_symbol_type type, bfd_vma offset)
7000 static const char *names[2] = { "$x", "$d" };
7001 Elf_Internal_Sym sym;
7003 sym.st_value = (osi->sec->output_section->vma
7004 + osi->sec->output_offset + offset);
7007 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7008 sym.st_shndx = osi->sec_shndx;
7009 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
7014 /* Output mapping symbols for PLT entries associated with H. */
7017 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
7019 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
7022 if (h->root.type == bfd_link_hash_indirect)
7025 if (h->root.type == bfd_link_hash_warning)
7026 /* When warning symbols are created, they **replace** the "real"
7027 entry in the hash table, thus we never get to see the real
7028 symbol in a hash traversal. So look at it now. */
7029 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7031 if (h->plt.offset == (bfd_vma) - 1)
7034 addr = h->plt.offset;
7037 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7044 /* Output a single local symbol for a generated stub. */
7047 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
7048 bfd_vma offset, bfd_vma size)
7050 Elf_Internal_Sym sym;
7052 sym.st_value = (osi->sec->output_section->vma
7053 + osi->sec->output_offset + offset);
7056 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7057 sym.st_shndx = osi->sec_shndx;
7058 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
7062 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7064 struct elf_aarch64_stub_hash_entry *stub_entry;
7068 output_arch_syminfo *osi;
7070 /* Massage our args to the form they really have. */
7071 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
7072 osi = (output_arch_syminfo *) in_arg;
7074 stub_sec = stub_entry->stub_sec;
7076 /* Ensure this stub is attached to the current section being
7078 if (stub_sec != osi->sec)
7081 addr = (bfd_vma) stub_entry->stub_offset;
7083 stub_name = stub_entry->output_name;
7085 switch (stub_entry->stub_type)
7087 case aarch64_stub_adrp_branch:
7088 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7089 sizeof (aarch64_adrp_branch_stub)))
7091 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7094 case aarch64_stub_long_branch:
7095 if (!elfNN_aarch64_output_stub_sym
7096 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
7098 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7100 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
7103 case aarch64_stub_erratum_835769_veneer:
7104 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7105 sizeof (aarch64_erratum_835769_stub)))
7107 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7110 case aarch64_stub_erratum_843419_veneer:
7111 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7112 sizeof (aarch64_erratum_843419_stub)))
7114 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7125 /* Output mapping symbols for linker generated sections. */
7128 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
7129 struct bfd_link_info *info,
7131 int (*func) (void *, const char *,
7134 struct elf_link_hash_entry
7137 output_arch_syminfo osi;
7138 struct elf_aarch64_link_hash_table *htab;
7140 htab = elf_aarch64_hash_table (info);
7146 /* Long calls stubs. */
7147 if (htab->stub_bfd && htab->stub_bfd->sections)
7151 for (stub_sec = htab->stub_bfd->sections;
7152 stub_sec != NULL; stub_sec = stub_sec->next)
7154 /* Ignore non-stub sections. */
7155 if (!strstr (stub_sec->name, STUB_SUFFIX))
7160 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7161 (output_bfd, osi.sec->output_section);
7163 /* The first instruction in a stub is always a branch. */
7164 if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0))
7167 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
7172 /* Finally, output mapping symbols for the PLT. */
7173 if (!htab->root.splt || htab->root.splt->size == 0)
7176 /* For now live without mapping symbols for the plt. */
7177 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7178 (output_bfd, htab->root.splt->output_section);
7179 osi.sec = htab->root.splt;
7181 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
7188 /* Allocate target specific section data. */
7191 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
7193 if (!sec->used_by_bfd)
7195 _aarch64_elf_section_data *sdata;
7196 bfd_size_type amt = sizeof (*sdata);
7198 sdata = bfd_zalloc (abfd, amt);
7201 sec->used_by_bfd = sdata;
7204 record_section_with_aarch64_elf_section_data (sec);
7206 return _bfd_elf_new_section_hook (abfd, sec);
7211 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
7213 void *ignore ATTRIBUTE_UNUSED)
7215 unrecord_section_with_aarch64_elf_section_data (sec);
7219 elfNN_aarch64_close_and_cleanup (bfd *abfd)
7222 bfd_map_over_sections (abfd,
7223 unrecord_section_via_map_over_sections, NULL);
7225 return _bfd_elf_close_and_cleanup (abfd);
7229 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
7232 bfd_map_over_sections (abfd,
7233 unrecord_section_via_map_over_sections, NULL);
7235 return _bfd_free_cached_info (abfd);
7238 /* Create dynamic sections. This is different from the ARM backend in that
7239 the got, plt, gotplt and their relocation sections are all created in the
7240 standard part of the bfd elf backend. */
7243 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
7244 struct bfd_link_info *info)
7246 struct elf_aarch64_link_hash_table *htab;
7248 /* We need to create .got section. */
7249 if (!aarch64_elf_create_got_section (dynobj, info))
7252 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
7255 htab = elf_aarch64_hash_table (info);
7256 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
7258 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
7260 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
7267 /* Allocate space in .plt, .got and associated reloc sections for
7271 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7273 struct bfd_link_info *info;
7274 struct elf_aarch64_link_hash_table *htab;
7275 struct elf_aarch64_link_hash_entry *eh;
7276 struct elf_dyn_relocs *p;
7278 /* An example of a bfd_link_hash_indirect symbol is versioned
7279 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7280 -> __gxx_personality_v0(bfd_link_hash_defined)
7282 There is no need to process bfd_link_hash_indirect symbols here
7283 because we will also be presented with the concrete instance of
7284 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7285 called to copy all relevant data from the generic to the concrete
7288 if (h->root.type == bfd_link_hash_indirect)
7291 if (h->root.type == bfd_link_hash_warning)
7292 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7294 info = (struct bfd_link_info *) inf;
7295 htab = elf_aarch64_hash_table (info);
7297 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7298 here if it is defined and referenced in a non-shared object. */
7299 if (h->type == STT_GNU_IFUNC
7302 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
7304 /* Make sure this symbol is output as a dynamic symbol.
7305 Undefined weak syms won't yet be marked as dynamic. */
7306 if (h->dynindx == -1 && !h->forced_local)
7308 if (!bfd_elf_link_record_dynamic_symbol (info, h))
7312 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
7314 asection *s = htab->root.splt;
7316 /* If this is the first .plt entry, make room for the special
7319 s->size += htab->plt_header_size;
7321 h->plt.offset = s->size;
7323 /* If this symbol is not defined in a regular file, and we are
7324 not generating a shared library, then set the symbol to this
7325 location in the .plt. This is required to make function
7326 pointers compare as equal between the normal executable and
7327 the shared library. */
7328 if (!info->shared && !h->def_regular)
7330 h->root.u.def.section = s;
7331 h->root.u.def.value = h->plt.offset;
7334 /* Make room for this entry. For now we only create the
7335 small model PLT entries. We later need to find a way
7336 of relaxing into these from the large model PLT entries. */
7337 s->size += PLT_SMALL_ENTRY_SIZE;
7339 /* We also need to make an entry in the .got.plt section, which
7340 will be placed in the .got section by the linker script. */
7341 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
7343 /* We also need to make an entry in the .rela.plt section. */
7344 htab->root.srelplt->size += RELOC_SIZE (htab);
7346 /* We need to ensure that all GOT entries that serve the PLT
7347 are consecutive with the special GOT slots [0] [1] and
7348 [2]. Any addtional relocations, such as
7349 R_AARCH64_TLSDESC, must be placed after the PLT related
7350 entries. We abuse the reloc_count such that during
7351 sizing we adjust reloc_count to indicate the number of
7352 PLT related reserved entries. In subsequent phases when
7353 filling in the contents of the reloc entries, PLT related
7354 entries are placed by computing their PLT index (0
7355 .. reloc_count). While other none PLT relocs are placed
7356 at the slot indicated by reloc_count and reloc_count is
7359 htab->root.srelplt->reloc_count++;
7363 h->plt.offset = (bfd_vma) - 1;
7369 h->plt.offset = (bfd_vma) - 1;
7373 eh = (struct elf_aarch64_link_hash_entry *) h;
7374 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7376 if (h->got.refcount > 0)
7379 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
7381 h->got.offset = (bfd_vma) - 1;
7383 dyn = htab->root.dynamic_sections_created;
7385 /* Make sure this symbol is output as a dynamic symbol.
7386 Undefined weak syms won't yet be marked as dynamic. */
7387 if (dyn && h->dynindx == -1 && !h->forced_local)
7389 if (!bfd_elf_link_record_dynamic_symbol (info, h))
7393 if (got_type == GOT_UNKNOWN)
7396 else if (got_type == GOT_NORMAL)
7398 h->got.offset = htab->root.sgot->size;
7399 htab->root.sgot->size += GOT_ENTRY_SIZE;
7400 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7401 || h->root.type != bfd_link_hash_undefweak)
7403 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7405 htab->root.srelgot->size += RELOC_SIZE (htab);
7411 if (got_type & GOT_TLSDESC_GD)
7413 eh->tlsdesc_got_jump_table_offset =
7414 (htab->root.sgotplt->size
7415 - aarch64_compute_jump_table_size (htab));
7416 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7417 h->got.offset = (bfd_vma) - 2;
7420 if (got_type & GOT_TLS_GD)
7422 h->got.offset = htab->root.sgot->size;
7423 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7426 if (got_type & GOT_TLS_IE)
7428 h->got.offset = htab->root.sgot->size;
7429 htab->root.sgot->size += GOT_ENTRY_SIZE;
7432 indx = h && h->dynindx != -1 ? h->dynindx : 0;
7433 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7434 || h->root.type != bfd_link_hash_undefweak)
7437 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7439 if (got_type & GOT_TLSDESC_GD)
7441 htab->root.srelplt->size += RELOC_SIZE (htab);
7442 /* Note reloc_count not incremented here! We have
7443 already adjusted reloc_count for this relocation
7446 /* TLSDESC PLT is now needed, but not yet determined. */
7447 htab->tlsdesc_plt = (bfd_vma) - 1;
7450 if (got_type & GOT_TLS_GD)
7451 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7453 if (got_type & GOT_TLS_IE)
7454 htab->root.srelgot->size += RELOC_SIZE (htab);
7460 h->got.offset = (bfd_vma) - 1;
7463 if (eh->dyn_relocs == NULL)
7466 /* In the shared -Bsymbolic case, discard space allocated for
7467 dynamic pc-relative relocs against symbols which turn out to be
7468 defined in regular objects. For the normal shared case, discard
7469 space for pc-relative relocs that have become local due to symbol
7470 visibility changes. */
7474 /* Relocs that use pc_count are those that appear on a call
7475 insn, or certain REL relocs that can generated via assembly.
7476 We want calls to protected symbols to resolve directly to the
7477 function rather than going via the plt. If people want
7478 function pointer comparisons to work as expected then they
7479 should avoid writing weird assembly. */
7480 if (SYMBOL_CALLS_LOCAL (info, h))
7482 struct elf_dyn_relocs **pp;
7484 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
7486 p->count -= p->pc_count;
7495 /* Also discard relocs on undefined weak syms with non-default
7497 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
7499 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7500 eh->dyn_relocs = NULL;
7502 /* Make sure undefined weak symbols are output as a dynamic
7504 else if (h->dynindx == -1
7506 && !bfd_elf_link_record_dynamic_symbol (info, h))
7511 else if (ELIMINATE_COPY_RELOCS)
7513 /* For the non-shared case, discard space for relocs against
7514 symbols which turn out to need copy relocs or are not
7520 || (htab->root.dynamic_sections_created
7521 && (h->root.type == bfd_link_hash_undefweak
7522 || h->root.type == bfd_link_hash_undefined))))
7524 /* Make sure this symbol is output as a dynamic symbol.
7525 Undefined weak syms won't yet be marked as dynamic. */
7526 if (h->dynindx == -1
7528 && !bfd_elf_link_record_dynamic_symbol (info, h))
7531 /* If that succeeded, we know we'll be keeping all the
7533 if (h->dynindx != -1)
7537 eh->dyn_relocs = NULL;
7542 /* Finally, allocate space. */
7543 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7547 sreloc = elf_section_data (p->sec)->sreloc;
7549 BFD_ASSERT (sreloc != NULL);
7551 sreloc->size += p->count * RELOC_SIZE (htab);
7557 /* Allocate space in .plt, .got and associated reloc sections for
7558 ifunc dynamic relocs. */
7561 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
7564 struct bfd_link_info *info;
7565 struct elf_aarch64_link_hash_table *htab;
7566 struct elf_aarch64_link_hash_entry *eh;
7568 /* An example of a bfd_link_hash_indirect symbol is versioned
7569 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7570 -> __gxx_personality_v0(bfd_link_hash_defined)
7572 There is no need to process bfd_link_hash_indirect symbols here
7573 because we will also be presented with the concrete instance of
7574 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7575 called to copy all relevant data from the generic to the concrete
7578 if (h->root.type == bfd_link_hash_indirect)
7581 if (h->root.type == bfd_link_hash_warning)
7582 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7584 info = (struct bfd_link_info *) inf;
7585 htab = elf_aarch64_hash_table (info);
7587 eh = (struct elf_aarch64_link_hash_entry *) h;
7589 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7590 here if it is defined and referenced in a non-shared object. */
7591 if (h->type == STT_GNU_IFUNC
7593 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
7595 htab->plt_entry_size,
7596 htab->plt_header_size,
7601 /* Allocate space in .plt, .got and associated reloc sections for
7602 local dynamic relocs. */
7605 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
7607 struct elf_link_hash_entry *h
7608 = (struct elf_link_hash_entry *) *slot;
7610 if (h->type != STT_GNU_IFUNC
7614 || h->root.type != bfd_link_hash_defined)
7617 return elfNN_aarch64_allocate_dynrelocs (h, inf);
7620 /* Allocate space in .plt, .got and associated reloc sections for
7621 local ifunc dynamic relocs. */
7624 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
7626 struct elf_link_hash_entry *h
7627 = (struct elf_link_hash_entry *) *slot;
7629 if (h->type != STT_GNU_IFUNC
7633 || h->root.type != bfd_link_hash_defined)
7636 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
7639 /* Find any dynamic relocs that apply to read-only sections. */
7642 aarch64_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
7644 struct elf_aarch64_link_hash_entry * eh;
7645 struct elf_dyn_relocs * p;
7647 eh = (struct elf_aarch64_link_hash_entry *) h;
7648 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7650 asection *s = p->sec;
7652 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7654 struct bfd_link_info *info = (struct bfd_link_info *) inf;
7656 info->flags |= DF_TEXTREL;
7658 /* Not an error, just cut short the traversal. */
7665 /* This is the most important function of all . Innocuosly named
7668 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7669 struct bfd_link_info *info)
7671 struct elf_aarch64_link_hash_table *htab;
7677 htab = elf_aarch64_hash_table ((info));
7678 dynobj = htab->root.dynobj;
7680 BFD_ASSERT (dynobj != NULL);
7682 if (htab->root.dynamic_sections_created)
7684 if (info->executable)
7686 s = bfd_get_linker_section (dynobj, ".interp");
7689 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7690 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7694 /* Set up .got offsets for local syms, and space for local dynamic
7696 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7698 struct elf_aarch64_local_symbol *locals = NULL;
7699 Elf_Internal_Shdr *symtab_hdr;
7703 if (!is_aarch64_elf (ibfd))
7706 for (s = ibfd->sections; s != NULL; s = s->next)
7708 struct elf_dyn_relocs *p;
7710 for (p = (struct elf_dyn_relocs *)
7711 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
7713 if (!bfd_is_abs_section (p->sec)
7714 && bfd_is_abs_section (p->sec->output_section))
7716 /* Input section has been discarded, either because
7717 it is a copy of a linkonce section or due to
7718 linker script /DISCARD/, so we'll be discarding
7721 else if (p->count != 0)
7723 srel = elf_section_data (p->sec)->sreloc;
7724 srel->size += p->count * RELOC_SIZE (htab);
7725 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7726 info->flags |= DF_TEXTREL;
7731 locals = elf_aarch64_locals (ibfd);
7735 symtab_hdr = &elf_symtab_hdr (ibfd);
7736 srel = htab->root.srelgot;
7737 for (i = 0; i < symtab_hdr->sh_info; i++)
7739 locals[i].got_offset = (bfd_vma) - 1;
7740 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7741 if (locals[i].got_refcount > 0)
7743 unsigned got_type = locals[i].got_type;
7744 if (got_type & GOT_TLSDESC_GD)
7746 locals[i].tlsdesc_got_jump_table_offset =
7747 (htab->root.sgotplt->size
7748 - aarch64_compute_jump_table_size (htab));
7749 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7750 locals[i].got_offset = (bfd_vma) - 2;
7753 if (got_type & GOT_TLS_GD)
7755 locals[i].got_offset = htab->root.sgot->size;
7756 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7759 if (got_type & GOT_TLS_IE
7760 || got_type & GOT_NORMAL)
7762 locals[i].got_offset = htab->root.sgot->size;
7763 htab->root.sgot->size += GOT_ENTRY_SIZE;
7766 if (got_type == GOT_UNKNOWN)
7772 if (got_type & GOT_TLSDESC_GD)
7774 htab->root.srelplt->size += RELOC_SIZE (htab);
7775 /* Note RELOC_COUNT not incremented here! */
7776 htab->tlsdesc_plt = (bfd_vma) - 1;
7779 if (got_type & GOT_TLS_GD)
7780 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7782 if (got_type & GOT_TLS_IE
7783 || got_type & GOT_NORMAL)
7784 htab->root.srelgot->size += RELOC_SIZE (htab);
7789 locals[i].got_refcount = (bfd_vma) - 1;
7795 /* Allocate global sym .plt and .got entries, and space for global
7796 sym dynamic relocs. */
7797 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
7800 /* Allocate global ifunc sym .plt and .got entries, and space for global
7801 ifunc sym dynamic relocs. */
7802 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
7805 /* Allocate .plt and .got entries, and space for local symbols. */
7806 htab_traverse (htab->loc_hash_table,
7807 elfNN_aarch64_allocate_local_dynrelocs,
7810 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
7811 htab_traverse (htab->loc_hash_table,
7812 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
7815 /* For every jump slot reserved in the sgotplt, reloc_count is
7816 incremented. However, when we reserve space for TLS descriptors,
7817 it's not incremented, so in order to compute the space reserved
7818 for them, it suffices to multiply the reloc count by the jump
7821 if (htab->root.srelplt)
7822 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
7824 if (htab->tlsdesc_plt)
7826 if (htab->root.splt->size == 0)
7827 htab->root.splt->size += PLT_ENTRY_SIZE;
7829 htab->tlsdesc_plt = htab->root.splt->size;
7830 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
7832 /* If we're not using lazy TLS relocations, don't generate the
7833 GOT entry required. */
7834 if (!(info->flags & DF_BIND_NOW))
7836 htab->dt_tlsdesc_got = htab->root.sgot->size;
7837 htab->root.sgot->size += GOT_ENTRY_SIZE;
7841 /* Init mapping symbols information to use later to distingush between
7842 code and data while scanning for errata. */
7843 if (htab->fix_erratum_835769 || htab->fix_erratum_843419)
7844 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7846 if (!is_aarch64_elf (ibfd))
7848 bfd_elfNN_aarch64_init_maps (ibfd);
7851 /* We now have determined the sizes of the various dynamic sections.
7852 Allocate memory for them. */
7854 for (s = dynobj->sections; s != NULL; s = s->next)
7856 if ((s->flags & SEC_LINKER_CREATED) == 0)
7859 if (s == htab->root.splt
7860 || s == htab->root.sgot
7861 || s == htab->root.sgotplt
7862 || s == htab->root.iplt
7863 || s == htab->root.igotplt || s == htab->sdynbss)
7865 /* Strip this section if we don't need it; see the
7868 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7870 if (s->size != 0 && s != htab->root.srelplt)
7873 /* We use the reloc_count field as a counter if we need
7874 to copy relocs into the output file. */
7875 if (s != htab->root.srelplt)
7880 /* It's not one of our sections, so don't allocate space. */
7886 /* If we don't need this section, strip it from the
7887 output file. This is mostly to handle .rela.bss and
7888 .rela.plt. We must create both sections in
7889 create_dynamic_sections, because they must be created
7890 before the linker maps input sections to output
7891 sections. The linker does that before
7892 adjust_dynamic_symbol is called, and it is that
7893 function which decides whether anything needs to go
7894 into these sections. */
7896 s->flags |= SEC_EXCLUDE;
7900 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7903 /* Allocate memory for the section contents. We use bfd_zalloc
7904 here in case unused entries are not reclaimed before the
7905 section's contents are written out. This should not happen,
7906 but this way if it does, we get a R_AARCH64_NONE reloc instead
7908 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
7909 if (s->contents == NULL)
7913 if (htab->root.dynamic_sections_created)
7915 /* Add some entries to the .dynamic section. We fill in the
7916 values later, in elfNN_aarch64_finish_dynamic_sections, but we
7917 must add the entries now so that we get the correct size for
7918 the .dynamic section. The DT_DEBUG entry is filled in by the
7919 dynamic linker and used by the debugger. */
7920 #define add_dynamic_entry(TAG, VAL) \
7921 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7923 if (info->executable)
7925 if (!add_dynamic_entry (DT_DEBUG, 0))
7929 if (htab->root.splt->size != 0)
7931 if (!add_dynamic_entry (DT_PLTGOT, 0)
7932 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7933 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7934 || !add_dynamic_entry (DT_JMPREL, 0))
7937 if (htab->tlsdesc_plt
7938 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
7939 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
7945 if (!add_dynamic_entry (DT_RELA, 0)
7946 || !add_dynamic_entry (DT_RELASZ, 0)
7947 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
7950 /* If any dynamic relocs apply to a read-only section,
7951 then we need a DT_TEXTREL entry. */
7952 if ((info->flags & DF_TEXTREL) == 0)
7953 elf_link_hash_traverse (& htab->root, aarch64_readonly_dynrelocs,
7956 if ((info->flags & DF_TEXTREL) != 0)
7958 if (!add_dynamic_entry (DT_TEXTREL, 0))
7963 #undef add_dynamic_entry
7969 elf_aarch64_update_plt_entry (bfd *output_bfd,
7970 bfd_reloc_code_real_type r_type,
7971 bfd_byte *plt_entry, bfd_vma value)
7973 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
7975 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
7979 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
7980 struct elf_aarch64_link_hash_table
7981 *htab, bfd *output_bfd,
7982 struct bfd_link_info *info)
7984 bfd_byte *plt_entry;
7987 bfd_vma gotplt_entry_address;
7988 bfd_vma plt_entry_address;
7989 Elf_Internal_Rela rela;
7991 asection *plt, *gotplt, *relplt;
7993 /* When building a static executable, use .iplt, .igot.plt and
7994 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7995 if (htab->root.splt != NULL)
7997 plt = htab->root.splt;
7998 gotplt = htab->root.sgotplt;
7999 relplt = htab->root.srelplt;
8003 plt = htab->root.iplt;
8004 gotplt = htab->root.igotplt;
8005 relplt = htab->root.irelplt;
8008 /* Get the index in the procedure linkage table which
8009 corresponds to this symbol. This is the index of this symbol
8010 in all the symbols for which we are making plt entries. The
8011 first entry in the procedure linkage table is reserved.
8013 Get the offset into the .got table of the entry that
8014 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
8015 bytes. The first three are reserved for the dynamic linker.
8017 For static executables, we don't reserve anything. */
8019 if (plt == htab->root.splt)
8021 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
8022 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
8026 plt_index = h->plt.offset / htab->plt_entry_size;
8027 got_offset = plt_index * GOT_ENTRY_SIZE;
8030 plt_entry = plt->contents + h->plt.offset;
8031 plt_entry_address = plt->output_section->vma
8032 + plt->output_offset + h->plt.offset;
8033 gotplt_entry_address = gotplt->output_section->vma +
8034 gotplt->output_offset + got_offset;
8036 /* Copy in the boiler-plate for the PLTn entry. */
8037 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
8039 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8040 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8041 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8043 PG (gotplt_entry_address) -
8044 PG (plt_entry_address));
8046 /* Fill in the lo12 bits for the load from the pltgot. */
8047 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8049 PG_OFFSET (gotplt_entry_address));
8051 /* Fill in the lo12 bits for the add from the pltgot entry. */
8052 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8054 PG_OFFSET (gotplt_entry_address));
8056 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8057 bfd_put_NN (output_bfd,
8058 plt->output_section->vma + plt->output_offset,
8059 gotplt->contents + got_offset);
8061 rela.r_offset = gotplt_entry_address;
8063 if (h->dynindx == -1
8064 || ((info->executable
8065 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8067 && h->type == STT_GNU_IFUNC))
8069 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8070 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8071 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
8072 rela.r_addend = (h->root.u.def.value
8073 + h->root.u.def.section->output_section->vma
8074 + h->root.u.def.section->output_offset);
8078 /* Fill in the entry in the .rela.plt section. */
8079 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
8083 /* Compute the relocation entry to used based on PLT index and do
8084 not adjust reloc_count. The reloc_count has already been adjusted
8085 to account for this entry. */
8086 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
8087 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8090 /* Size sections even though they're not dynamic. We use it to setup
8091 _TLS_MODULE_BASE_, if needed. */
8094 elfNN_aarch64_always_size_sections (bfd *output_bfd,
8095 struct bfd_link_info *info)
8099 if (info->relocatable)
8102 tls_sec = elf_hash_table (info)->tls_sec;
8106 struct elf_link_hash_entry *tlsbase;
8108 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
8109 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
8113 struct bfd_link_hash_entry *h = NULL;
8114 const struct elf_backend_data *bed =
8115 get_elf_backend_data (output_bfd);
8117 if (!(_bfd_generic_link_add_one_symbol
8118 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
8119 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
8122 tlsbase->type = STT_TLS;
8123 tlsbase = (struct elf_link_hash_entry *) h;
8124 tlsbase->def_regular = 1;
8125 tlsbase->other = STV_HIDDEN;
8126 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
8133 /* Finish up dynamic symbol handling. We set the contents of various
8134 dynamic sections here. */
8136 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
8137 struct bfd_link_info *info,
8138 struct elf_link_hash_entry *h,
8139 Elf_Internal_Sym *sym)
8141 struct elf_aarch64_link_hash_table *htab;
8142 htab = elf_aarch64_hash_table (info);
8144 if (h->plt.offset != (bfd_vma) - 1)
8146 asection *plt, *gotplt, *relplt;
8148 /* This symbol has an entry in the procedure linkage table. Set
8151 /* When building a static executable, use .iplt, .igot.plt and
8152 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8153 if (htab->root.splt != NULL)
8155 plt = htab->root.splt;
8156 gotplt = htab->root.sgotplt;
8157 relplt = htab->root.srelplt;
8161 plt = htab->root.iplt;
8162 gotplt = htab->root.igotplt;
8163 relplt = htab->root.irelplt;
8166 /* This symbol has an entry in the procedure linkage table. Set
8168 if ((h->dynindx == -1
8169 && !((h->forced_local || info->executable)
8171 && h->type == STT_GNU_IFUNC))
8177 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
8178 if (!h->def_regular)
8180 /* Mark the symbol as undefined, rather than as defined in
8181 the .plt section. */
8182 sym->st_shndx = SHN_UNDEF;
8183 /* If the symbol is weak we need to clear the value.
8184 Otherwise, the PLT entry would provide a definition for
8185 the symbol even if the symbol wasn't defined anywhere,
8186 and so the symbol would never be NULL. Leave the value if
8187 there were any relocations where pointer equality matters
8188 (this is a clue for the dynamic linker, to make function
8189 pointer comparisons work between an application and shared
8191 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
8196 if (h->got.offset != (bfd_vma) - 1
8197 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
8199 Elf_Internal_Rela rela;
8202 /* This symbol has an entry in the global offset table. Set it
8204 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
8207 rela.r_offset = (htab->root.sgot->output_section->vma
8208 + htab->root.sgot->output_offset
8209 + (h->got.offset & ~(bfd_vma) 1));
8212 && h->type == STT_GNU_IFUNC)
8216 /* Generate R_AARCH64_GLOB_DAT. */
8223 if (!h->pointer_equality_needed)
8226 /* For non-shared object, we can't use .got.plt, which
8227 contains the real function address if we need pointer
8228 equality. We load the GOT entry with the PLT entry. */
8229 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
8230 bfd_put_NN (output_bfd, (plt->output_section->vma
8231 + plt->output_offset
8233 htab->root.sgot->contents
8234 + (h->got.offset & ~(bfd_vma) 1));
8238 else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
8240 if (!h->def_regular)
8243 BFD_ASSERT ((h->got.offset & 1) != 0);
8244 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
8245 rela.r_addend = (h->root.u.def.value
8246 + h->root.u.def.section->output_section->vma
8247 + h->root.u.def.section->output_offset);
8252 BFD_ASSERT ((h->got.offset & 1) == 0);
8253 bfd_put_NN (output_bfd, (bfd_vma) 0,
8254 htab->root.sgot->contents + h->got.offset);
8255 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
8259 loc = htab->root.srelgot->contents;
8260 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
8261 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8266 Elf_Internal_Rela rela;
8269 /* This symbol needs a copy reloc. Set it up. */
8271 if (h->dynindx == -1
8272 || (h->root.type != bfd_link_hash_defined
8273 && h->root.type != bfd_link_hash_defweak)
8274 || htab->srelbss == NULL)
8277 rela.r_offset = (h->root.u.def.value
8278 + h->root.u.def.section->output_section->vma
8279 + h->root.u.def.section->output_offset);
8280 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
8282 loc = htab->srelbss->contents;
8283 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
8284 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8287 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
8288 be NULL for local symbols. */
8290 && (h == elf_hash_table (info)->hdynamic
8291 || h == elf_hash_table (info)->hgot))
8292 sym->st_shndx = SHN_ABS;
8297 /* Finish up local dynamic symbol handling. We set the contents of
8298 various dynamic sections here. */
8301 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
8303 struct elf_link_hash_entry *h
8304 = (struct elf_link_hash_entry *) *slot;
8305 struct bfd_link_info *info
8306 = (struct bfd_link_info *) inf;
8308 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
8313 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
8314 struct elf_aarch64_link_hash_table
8317 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
8318 small and large plts and at the minute just generates
8321 /* PLT0 of the small PLT looks like this in ELF64 -
8322 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
8323 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
8324 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
8326 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
8327 // GOTPLT entry for this.
8329 PLT0 will be slightly different in ELF32 due to different got entry
8332 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
8336 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
8338 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
8341 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
8342 + htab->root.sgotplt->output_offset
8343 + GOT_ENTRY_SIZE * 2);
8345 plt_base = htab->root.splt->output_section->vma +
8346 htab->root.splt->output_offset;
8348 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8349 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8350 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8351 htab->root.splt->contents + 4,
8352 PG (plt_got_2nd_ent) - PG (plt_base + 4));
8354 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8355 htab->root.splt->contents + 8,
8356 PG_OFFSET (plt_got_2nd_ent));
8358 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8359 htab->root.splt->contents + 12,
8360 PG_OFFSET (plt_got_2nd_ent));
8364 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
8365 struct bfd_link_info *info)
8367 struct elf_aarch64_link_hash_table *htab;
8371 htab = elf_aarch64_hash_table (info);
8372 dynobj = htab->root.dynobj;
8373 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
8375 if (htab->root.dynamic_sections_created)
8377 ElfNN_External_Dyn *dyncon, *dynconend;
8379 if (sdyn == NULL || htab->root.sgot == NULL)
8382 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
8383 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
8384 for (; dyncon < dynconend; dyncon++)
8386 Elf_Internal_Dyn dyn;
8389 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
8397 s = htab->root.sgotplt;
8398 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8402 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
8406 s = htab->root.srelplt;
8407 dyn.d_un.d_val = s->size;
8411 /* The procedure linkage table relocs (DT_JMPREL) should
8412 not be included in the overall relocs (DT_RELA).
8413 Therefore, we override the DT_RELASZ entry here to
8414 make it not include the JMPREL relocs. Since the
8415 linker script arranges for .rela.plt to follow all
8416 other relocation sections, we don't have to worry
8417 about changing the DT_RELA entry. */
8418 if (htab->root.srelplt != NULL)
8420 s = htab->root.srelplt;
8421 dyn.d_un.d_val -= s->size;
8425 case DT_TLSDESC_PLT:
8426 s = htab->root.splt;
8427 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
8428 + htab->tlsdesc_plt;
8431 case DT_TLSDESC_GOT:
8432 s = htab->root.sgot;
8433 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
8434 + htab->dt_tlsdesc_got;
8438 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
8443 /* Fill in the special first entry in the procedure linkage table. */
8444 if (htab->root.splt && htab->root.splt->size > 0)
8446 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
8448 elf_section_data (htab->root.splt->output_section)->
8449 this_hdr.sh_entsize = htab->plt_entry_size;
8452 if (htab->tlsdesc_plt)
8454 bfd_put_NN (output_bfd, (bfd_vma) 0,
8455 htab->root.sgot->contents + htab->dt_tlsdesc_got);
8457 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
8458 elfNN_aarch64_tlsdesc_small_plt_entry,
8459 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
8462 bfd_vma adrp1_addr =
8463 htab->root.splt->output_section->vma
8464 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
8466 bfd_vma adrp2_addr = adrp1_addr + 4;
8469 htab->root.sgot->output_section->vma
8470 + htab->root.sgot->output_offset;
8472 bfd_vma pltgot_addr =
8473 htab->root.sgotplt->output_section->vma
8474 + htab->root.sgotplt->output_offset;
8476 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
8478 bfd_byte *plt_entry =
8479 htab->root.splt->contents + htab->tlsdesc_plt;
8481 /* adrp x2, DT_TLSDESC_GOT */
8482 elf_aarch64_update_plt_entry (output_bfd,
8483 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8485 (PG (dt_tlsdesc_got)
8486 - PG (adrp1_addr)));
8489 elf_aarch64_update_plt_entry (output_bfd,
8490 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8493 - PG (adrp2_addr)));
8495 /* ldr x2, [x2, #0] */
8496 elf_aarch64_update_plt_entry (output_bfd,
8497 BFD_RELOC_AARCH64_LDSTNN_LO12,
8499 PG_OFFSET (dt_tlsdesc_got));
8502 elf_aarch64_update_plt_entry (output_bfd,
8503 BFD_RELOC_AARCH64_ADD_LO12,
8505 PG_OFFSET (pltgot_addr));
8510 if (htab->root.sgotplt)
8512 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
8514 (*_bfd_error_handler)
8515 (_("discarded output section: `%A'"), htab->root.sgotplt);
8519 /* Fill in the first three entries in the global offset table. */
8520 if (htab->root.sgotplt->size > 0)
8522 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
8524 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
8525 bfd_put_NN (output_bfd,
8527 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
8528 bfd_put_NN (output_bfd,
8530 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
8533 if (htab->root.sgot)
8535 if (htab->root.sgot->size > 0)
8538 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
8539 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
8543 elf_section_data (htab->root.sgotplt->output_section)->
8544 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
8547 if (htab->root.sgot && htab->root.sgot->size > 0)
8548 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
8551 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
8552 htab_traverse (htab->loc_hash_table,
8553 elfNN_aarch64_finish_local_dynamic_symbol,
8559 /* Return address for Ith PLT stub in section PLT, for relocation REL
8560 or (bfd_vma) -1 if it should not be included. */
8563 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
8564 const arelent *rel ATTRIBUTE_UNUSED)
8566 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
8570 /* We use this so we can override certain functions
8571 (though currently we don't). */
8573 const struct elf_size_info elfNN_aarch64_size_info =
8575 sizeof (ElfNN_External_Ehdr),
8576 sizeof (ElfNN_External_Phdr),
8577 sizeof (ElfNN_External_Shdr),
8578 sizeof (ElfNN_External_Rel),
8579 sizeof (ElfNN_External_Rela),
8580 sizeof (ElfNN_External_Sym),
8581 sizeof (ElfNN_External_Dyn),
8582 sizeof (Elf_External_Note),
8583 4, /* Hash table entry size. */
8584 1, /* Internal relocs per external relocs. */
8585 ARCH_SIZE, /* Arch size. */
8586 LOG_FILE_ALIGN, /* Log_file_align. */
8587 ELFCLASSNN, EV_CURRENT,
8588 bfd_elfNN_write_out_phdrs,
8589 bfd_elfNN_write_shdrs_and_ehdr,
8590 bfd_elfNN_checksum_contents,
8591 bfd_elfNN_write_relocs,
8592 bfd_elfNN_swap_symbol_in,
8593 bfd_elfNN_swap_symbol_out,
8594 bfd_elfNN_slurp_reloc_table,
8595 bfd_elfNN_slurp_symbol_table,
8596 bfd_elfNN_swap_dyn_in,
8597 bfd_elfNN_swap_dyn_out,
8598 bfd_elfNN_swap_reloc_in,
8599 bfd_elfNN_swap_reloc_out,
8600 bfd_elfNN_swap_reloca_in,
8601 bfd_elfNN_swap_reloca_out
8604 #define ELF_ARCH bfd_arch_aarch64
8605 #define ELF_MACHINE_CODE EM_AARCH64
8606 #define ELF_MAXPAGESIZE 0x10000
8607 #define ELF_MINPAGESIZE 0x1000
8608 #define ELF_COMMONPAGESIZE 0x1000
8610 #define bfd_elfNN_close_and_cleanup \
8611 elfNN_aarch64_close_and_cleanup
8613 #define bfd_elfNN_bfd_free_cached_info \
8614 elfNN_aarch64_bfd_free_cached_info
8616 #define bfd_elfNN_bfd_is_target_special_symbol \
8617 elfNN_aarch64_is_target_special_symbol
8619 #define bfd_elfNN_bfd_link_hash_table_create \
8620 elfNN_aarch64_link_hash_table_create
8622 #define bfd_elfNN_bfd_merge_private_bfd_data \
8623 elfNN_aarch64_merge_private_bfd_data
8625 #define bfd_elfNN_bfd_print_private_bfd_data \
8626 elfNN_aarch64_print_private_bfd_data
8628 #define bfd_elfNN_bfd_reloc_type_lookup \
8629 elfNN_aarch64_reloc_type_lookup
8631 #define bfd_elfNN_bfd_reloc_name_lookup \
8632 elfNN_aarch64_reloc_name_lookup
8634 #define bfd_elfNN_bfd_set_private_flags \
8635 elfNN_aarch64_set_private_flags
8637 #define bfd_elfNN_find_inliner_info \
8638 elfNN_aarch64_find_inliner_info
8640 #define bfd_elfNN_find_nearest_line \
8641 elfNN_aarch64_find_nearest_line
8643 #define bfd_elfNN_mkobject \
8644 elfNN_aarch64_mkobject
8646 #define bfd_elfNN_new_section_hook \
8647 elfNN_aarch64_new_section_hook
8649 #define elf_backend_adjust_dynamic_symbol \
8650 elfNN_aarch64_adjust_dynamic_symbol
8652 #define elf_backend_always_size_sections \
8653 elfNN_aarch64_always_size_sections
8655 #define elf_backend_check_relocs \
8656 elfNN_aarch64_check_relocs
8658 #define elf_backend_copy_indirect_symbol \
8659 elfNN_aarch64_copy_indirect_symbol
8661 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
8662 to them in our hash. */
8663 #define elf_backend_create_dynamic_sections \
8664 elfNN_aarch64_create_dynamic_sections
8666 #define elf_backend_init_index_section \
8667 _bfd_elf_init_2_index_sections
8669 #define elf_backend_finish_dynamic_sections \
8670 elfNN_aarch64_finish_dynamic_sections
8672 #define elf_backend_finish_dynamic_symbol \
8673 elfNN_aarch64_finish_dynamic_symbol
8675 #define elf_backend_gc_sweep_hook \
8676 elfNN_aarch64_gc_sweep_hook
8678 #define elf_backend_object_p \
8679 elfNN_aarch64_object_p
8681 #define elf_backend_output_arch_local_syms \
8682 elfNN_aarch64_output_arch_local_syms
8684 #define elf_backend_plt_sym_val \
8685 elfNN_aarch64_plt_sym_val
8687 #define elf_backend_post_process_headers \
8688 elfNN_aarch64_post_process_headers
8690 #define elf_backend_relocate_section \
8691 elfNN_aarch64_relocate_section
8693 #define elf_backend_reloc_type_class \
8694 elfNN_aarch64_reloc_type_class
8696 #define elf_backend_section_from_shdr \
8697 elfNN_aarch64_section_from_shdr
8699 #define elf_backend_size_dynamic_sections \
8700 elfNN_aarch64_size_dynamic_sections
8702 #define elf_backend_size_info \
8703 elfNN_aarch64_size_info
8705 #define elf_backend_write_section \
8706 elfNN_aarch64_write_section
8708 #define elf_backend_can_refcount 1
8709 #define elf_backend_can_gc_sections 1
8710 #define elf_backend_plt_readonly 1
8711 #define elf_backend_want_got_plt 1
8712 #define elf_backend_want_plt_sym 0
8713 #define elf_backend_may_use_rel_p 0
8714 #define elf_backend_may_use_rela_p 1
8715 #define elf_backend_default_use_rela_p 1
8716 #define elf_backend_rela_normal 1
8717 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
8718 #define elf_backend_default_execstack 0
8719 #define elf_backend_extern_protected_data 1
8721 #undef elf_backend_obj_attrs_section
8722 #define elf_backend_obj_attrs_section ".ARM.attributes"
8724 #include "elfNN-target.h"
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