1 /* AArch64-specific support for NN-bit ELF.
2 Copyright 2009-2013 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 "elf/aarch64.h"
146 #include "elfxx-aarch64.h"
151 #define AARCH64_R(NAME) R_AARCH64_ ## NAME
152 #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
153 #define HOWTO64(...) HOWTO (__VA_ARGS__)
154 #define HOWTO32(...) EMPTY_HOWTO (0)
155 #define LOG_FILE_ALIGN 3
159 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
160 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
161 #define HOWTO64(...) EMPTY_HOWTO (0)
162 #define HOWTO32(...) HOWTO (__VA_ARGS__)
163 #define LOG_FILE_ALIGN 2
166 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
167 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
168 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
186 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
188 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
189 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
190 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC)
202 #define ELIMINATE_COPY_RELOCS 0
204 /* Return size of a relocation entry. HTAB is the bfd's
205 elf_aarch64_link_hash_entry. */
206 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
208 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
209 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
210 #define PLT_ENTRY_SIZE (32)
211 #define PLT_SMALL_ENTRY_SIZE (16)
212 #define PLT_TLSDESC_ENTRY_SIZE (32)
214 /* Encoding of the nop instruction */
215 #define INSN_NOP 0xd503201f
217 #define aarch64_compute_jump_table_size(htab) \
218 (((htab)->root.srelplt == NULL) ? 0 \
219 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
221 /* The first entry in a procedure linkage table looks like this
222 if the distance between the PLTGOT and the PLT is < 4GB use
223 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
224 in x16 and needs to work out PLTGOT[1] by using an address of
225 [x16,#-GOT_ENTRY_SIZE]. */
226 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
228 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
229 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
231 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
232 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
234 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
235 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
237 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
238 0x1f, 0x20, 0x03, 0xd5, /* nop */
239 0x1f, 0x20, 0x03, 0xd5, /* nop */
240 0x1f, 0x20, 0x03, 0xd5, /* nop */
243 /* Per function entry in a procedure linkage table looks like this
244 if the distance between the PLTGOT and the PLT is < 4GB use
245 these PLT entries. */
246 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
248 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
250 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
251 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
253 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
254 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
256 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
259 static const bfd_byte
260 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
262 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
263 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
264 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
266 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
267 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
269 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
270 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
272 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
273 0x1f, 0x20, 0x03, 0xd5, /* nop */
274 0x1f, 0x20, 0x03, 0xd5, /* nop */
277 #define elf_info_to_howto elfNN_aarch64_info_to_howto
278 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
280 #define AARCH64_ELF_ABI_VERSION 0
282 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
283 #define ALL_ONES (~ (bfd_vma) 0)
285 /* Indexed by the bfd interal reloc enumerators.
286 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
289 static reloc_howto_type elfNN_aarch64_howto_table[] =
293 /* Basic data relocations. */
296 HOWTO (R_AARCH64_NULL, /* type */
298 0, /* size (0 = byte, 1 = short, 2 = long) */
300 FALSE, /* pc_relative */
302 complain_overflow_dont, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_AARCH64_NULL", /* name */
305 FALSE, /* partial_inplace */
308 FALSE), /* pcrel_offset */
310 HOWTO (R_AARCH64_NONE, /* type */
312 0, /* size (0 = byte, 1 = short, 2 = long) */
314 FALSE, /* pc_relative */
316 complain_overflow_dont, /* complain_on_overflow */
317 bfd_elf_generic_reloc, /* special_function */
318 "R_AARCH64_NONE", /* name */
319 FALSE, /* partial_inplace */
322 FALSE), /* pcrel_offset */
326 HOWTO64 (AARCH64_R (ABS64), /* type */
328 4, /* size (4 = long long) */
330 FALSE, /* pc_relative */
332 complain_overflow_unsigned, /* complain_on_overflow */
333 bfd_elf_generic_reloc, /* special_function */
334 AARCH64_R_STR (ABS64), /* name */
335 FALSE, /* partial_inplace */
336 ALL_ONES, /* src_mask */
337 ALL_ONES, /* dst_mask */
338 FALSE), /* pcrel_offset */
341 HOWTO (AARCH64_R (ABS32), /* type */
343 2, /* size (0 = byte, 1 = short, 2 = long) */
345 FALSE, /* pc_relative */
347 complain_overflow_unsigned, /* complain_on_overflow */
348 bfd_elf_generic_reloc, /* special_function */
349 AARCH64_R_STR (ABS32), /* name */
350 FALSE, /* partial_inplace */
351 0xffffffff, /* src_mask */
352 0xffffffff, /* dst_mask */
353 FALSE), /* pcrel_offset */
356 HOWTO (AARCH64_R (ABS16), /* type */
358 1, /* size (0 = byte, 1 = short, 2 = long) */
360 FALSE, /* pc_relative */
362 complain_overflow_unsigned, /* complain_on_overflow */
363 bfd_elf_generic_reloc, /* special_function */
364 AARCH64_R_STR (ABS16), /* name */
365 FALSE, /* partial_inplace */
366 0xffff, /* src_mask */
367 0xffff, /* dst_mask */
368 FALSE), /* pcrel_offset */
370 /* .xword: (S+A-P) */
371 HOWTO64 (AARCH64_R (PREL64), /* type */
373 4, /* size (4 = long long) */
375 TRUE, /* pc_relative */
377 complain_overflow_signed, /* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 AARCH64_R_STR (PREL64), /* name */
380 FALSE, /* partial_inplace */
381 ALL_ONES, /* src_mask */
382 ALL_ONES, /* dst_mask */
383 TRUE), /* pcrel_offset */
386 HOWTO (AARCH64_R (PREL32), /* type */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
390 TRUE, /* pc_relative */
392 complain_overflow_signed, /* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 AARCH64_R_STR (PREL32), /* name */
395 FALSE, /* partial_inplace */
396 0xffffffff, /* src_mask */
397 0xffffffff, /* dst_mask */
398 TRUE), /* pcrel_offset */
401 HOWTO (AARCH64_R (PREL16), /* type */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
405 TRUE, /* pc_relative */
407 complain_overflow_signed, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 AARCH64_R_STR (PREL16), /* name */
410 FALSE, /* partial_inplace */
411 0xffff, /* src_mask */
412 0xffff, /* dst_mask */
413 TRUE), /* pcrel_offset */
415 /* Group relocations to create a 16, 32, 48 or 64 bit
416 unsigned data or abs address inline. */
418 /* MOVZ: ((S+A) >> 0) & 0xffff */
419 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 FALSE, /* pc_relative */
425 complain_overflow_unsigned, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 AARCH64_R_STR (MOVW_UABS_G0), /* name */
428 FALSE, /* partial_inplace */
429 0xffff, /* src_mask */
430 0xffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
433 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
434 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
436 2, /* size (0 = byte, 1 = short, 2 = long) */
438 FALSE, /* pc_relative */
440 complain_overflow_dont, /* complain_on_overflow */
441 bfd_elf_generic_reloc, /* special_function */
442 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
443 FALSE, /* partial_inplace */
444 0xffff, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
448 /* MOVZ: ((S+A) >> 16) & 0xffff */
449 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
453 FALSE, /* pc_relative */
455 complain_overflow_unsigned, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 AARCH64_R_STR (MOVW_UABS_G1), /* name */
458 FALSE, /* partial_inplace */
459 0xffff, /* src_mask */
460 0xffff, /* dst_mask */
461 FALSE), /* pcrel_offset */
463 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
464 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
468 FALSE, /* pc_relative */
470 complain_overflow_dont, /* complain_on_overflow */
471 bfd_elf_generic_reloc, /* special_function */
472 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
473 FALSE, /* partial_inplace */
474 0xffff, /* src_mask */
475 0xffff, /* dst_mask */
476 FALSE), /* pcrel_offset */
478 /* MOVZ: ((S+A) >> 32) & 0xffff */
479 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
483 FALSE, /* pc_relative */
485 complain_overflow_unsigned, /* complain_on_overflow */
486 bfd_elf_generic_reloc, /* special_function */
487 AARCH64_R_STR (MOVW_UABS_G2), /* name */
488 FALSE, /* partial_inplace */
489 0xffff, /* src_mask */
490 0xffff, /* dst_mask */
491 FALSE), /* pcrel_offset */
493 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
494 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
498 FALSE, /* pc_relative */
500 complain_overflow_dont, /* complain_on_overflow */
501 bfd_elf_generic_reloc, /* special_function */
502 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
503 FALSE, /* partial_inplace */
504 0xffff, /* src_mask */
505 0xffff, /* dst_mask */
506 FALSE), /* pcrel_offset */
508 /* MOVZ: ((S+A) >> 48) & 0xffff */
509 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
513 FALSE, /* pc_relative */
515 complain_overflow_unsigned, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 AARCH64_R_STR (MOVW_UABS_G3), /* name */
518 FALSE, /* partial_inplace */
519 0xffff, /* src_mask */
520 0xffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
523 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
524 signed data or abs address inline. Will change instruction
525 to MOVN or MOVZ depending on sign of calculated value. */
527 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
528 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
530 2, /* size (0 = byte, 1 = short, 2 = long) */
532 FALSE, /* pc_relative */
534 complain_overflow_signed, /* complain_on_overflow */
535 bfd_elf_generic_reloc, /* special_function */
536 AARCH64_R_STR (MOVW_SABS_G0), /* name */
537 FALSE, /* partial_inplace */
538 0xffff, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
542 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
543 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
545 2, /* size (0 = byte, 1 = short, 2 = long) */
547 FALSE, /* pc_relative */
549 complain_overflow_signed, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 AARCH64_R_STR (MOVW_SABS_G1), /* name */
552 FALSE, /* partial_inplace */
553 0xffff, /* src_mask */
554 0xffff, /* dst_mask */
555 FALSE), /* pcrel_offset */
557 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
558 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
562 FALSE, /* pc_relative */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 AARCH64_R_STR (MOVW_SABS_G2), /* name */
567 FALSE, /* partial_inplace */
568 0xffff, /* src_mask */
569 0xffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
572 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
573 addresses: PG(x) is (x & ~0xfff). */
575 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
576 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
580 TRUE, /* pc_relative */
582 complain_overflow_signed, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 AARCH64_R_STR (LD_PREL_LO19), /* name */
585 FALSE, /* partial_inplace */
586 0x7ffff, /* src_mask */
587 0x7ffff, /* dst_mask */
588 TRUE), /* pcrel_offset */
590 /* ADR: (S+A-P) & 0x1fffff */
591 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
595 TRUE, /* pc_relative */
597 complain_overflow_signed, /* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 AARCH64_R_STR (ADR_PREL_LO21), /* name */
600 FALSE, /* partial_inplace */
601 0x1fffff, /* src_mask */
602 0x1fffff, /* dst_mask */
603 TRUE), /* pcrel_offset */
605 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
606 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
610 TRUE, /* pc_relative */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
615 FALSE, /* partial_inplace */
616 0x1fffff, /* src_mask */
617 0x1fffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
620 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
621 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
625 TRUE, /* pc_relative */
627 complain_overflow_dont, /* complain_on_overflow */
628 bfd_elf_generic_reloc, /* special_function */
629 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
630 FALSE, /* partial_inplace */
631 0x1fffff, /* src_mask */
632 0x1fffff, /* dst_mask */
633 TRUE), /* pcrel_offset */
635 /* ADD: (S+A) & 0xfff [no overflow check] */
636 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
638 2, /* size (0 = byte, 1 = short, 2 = long) */
640 FALSE, /* pc_relative */
642 complain_overflow_dont, /* complain_on_overflow */
643 bfd_elf_generic_reloc, /* special_function */
644 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
645 FALSE, /* partial_inplace */
646 0x3ffc00, /* src_mask */
647 0x3ffc00, /* dst_mask */
648 FALSE), /* pcrel_offset */
650 /* LD/ST8: (S+A) & 0xfff */
651 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
655 FALSE, /* pc_relative */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
660 FALSE, /* partial_inplace */
661 0xfff, /* src_mask */
662 0xfff, /* dst_mask */
663 FALSE), /* pcrel_offset */
665 /* Relocations for control-flow instructions. */
667 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
668 HOWTO (AARCH64_R (TSTBR14), /* type */
670 2, /* size (0 = byte, 1 = short, 2 = long) */
672 TRUE, /* pc_relative */
674 complain_overflow_signed, /* complain_on_overflow */
675 bfd_elf_generic_reloc, /* special_function */
676 AARCH64_R_STR (TSTBR14), /* name */
677 FALSE, /* partial_inplace */
678 0x3fff, /* src_mask */
679 0x3fff, /* dst_mask */
680 TRUE), /* pcrel_offset */
682 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
683 HOWTO (AARCH64_R (CONDBR19), /* type */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
687 TRUE, /* pc_relative */
689 complain_overflow_signed, /* complain_on_overflow */
690 bfd_elf_generic_reloc, /* special_function */
691 AARCH64_R_STR (CONDBR19), /* name */
692 FALSE, /* partial_inplace */
693 0x7ffff, /* src_mask */
694 0x7ffff, /* dst_mask */
695 TRUE), /* pcrel_offset */
697 /* B: ((S+A-P) >> 2) & 0x3ffffff */
698 HOWTO (AARCH64_R (JUMP26), /* type */
700 2, /* size (0 = byte, 1 = short, 2 = long) */
702 TRUE, /* pc_relative */
704 complain_overflow_signed, /* complain_on_overflow */
705 bfd_elf_generic_reloc, /* special_function */
706 AARCH64_R_STR (JUMP26), /* name */
707 FALSE, /* partial_inplace */
708 0x3ffffff, /* src_mask */
709 0x3ffffff, /* dst_mask */
710 TRUE), /* pcrel_offset */
712 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
713 HOWTO (AARCH64_R (CALL26), /* type */
715 2, /* size (0 = byte, 1 = short, 2 = long) */
717 TRUE, /* pc_relative */
719 complain_overflow_signed, /* complain_on_overflow */
720 bfd_elf_generic_reloc, /* special_function */
721 AARCH64_R_STR (CALL26), /* name */
722 FALSE, /* partial_inplace */
723 0x3ffffff, /* src_mask */
724 0x3ffffff, /* dst_mask */
725 TRUE), /* pcrel_offset */
727 /* LD/ST16: (S+A) & 0xffe */
728 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
730 2, /* size (0 = byte, 1 = short, 2 = long) */
732 FALSE, /* pc_relative */
734 complain_overflow_dont, /* complain_on_overflow */
735 bfd_elf_generic_reloc, /* special_function */
736 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
737 FALSE, /* partial_inplace */
738 0xffe, /* src_mask */
739 0xffe, /* dst_mask */
740 FALSE), /* pcrel_offset */
742 /* LD/ST32: (S+A) & 0xffc */
743 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE, /* pc_relative */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
752 FALSE, /* partial_inplace */
753 0xffc, /* src_mask */
754 0xffc, /* dst_mask */
755 FALSE), /* pcrel_offset */
757 /* LD/ST64: (S+A) & 0xff8 */
758 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
762 FALSE, /* pc_relative */
764 complain_overflow_dont, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
767 FALSE, /* partial_inplace */
768 0xff8, /* src_mask */
769 0xff8, /* dst_mask */
770 FALSE), /* pcrel_offset */
772 /* LD/ST128: (S+A) & 0xff0 */
773 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
777 FALSE, /* pc_relative */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
782 FALSE, /* partial_inplace */
783 0xff0, /* src_mask */
784 0xff0, /* dst_mask */
785 FALSE), /* pcrel_offset */
787 /* Set a load-literal immediate field to bits
788 0x1FFFFC of G(S)-P */
789 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
791 2, /* size (0 = byte,1 = short,2 = long) */
793 TRUE, /* pc_relative */
795 complain_overflow_signed, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 AARCH64_R_STR (GOT_LD_PREL19), /* name */
798 FALSE, /* partial_inplace */
799 0xffffe0, /* src_mask */
800 0xffffe0, /* dst_mask */
801 TRUE), /* pcrel_offset */
803 /* Get to the page for the GOT entry for the symbol
804 (G(S) - P) using an ADRP instruction. */
805 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
807 2, /* size (0 = byte, 1 = short, 2 = long) */
809 TRUE, /* pc_relative */
811 complain_overflow_dont, /* complain_on_overflow */
812 bfd_elf_generic_reloc, /* special_function */
813 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
814 FALSE, /* partial_inplace */
815 0x1fffff, /* src_mask */
816 0x1fffff, /* dst_mask */
817 TRUE), /* pcrel_offset */
819 /* LD64: GOT offset G(S) & 0xff8 */
820 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
822 2, /* size (0 = byte, 1 = short, 2 = long) */
824 FALSE, /* pc_relative */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
829 FALSE, /* partial_inplace */
830 0xff8, /* src_mask */
831 0xff8, /* dst_mask */
832 FALSE), /* pcrel_offset */
834 /* LD32: GOT offset G(S) & 0xffc */
835 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
839 FALSE, /* pc_relative */
841 complain_overflow_dont, /* complain_on_overflow */
842 bfd_elf_generic_reloc, /* special_function */
843 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
844 FALSE, /* partial_inplace */
845 0xffc, /* src_mask */
846 0xffc, /* dst_mask */
847 FALSE), /* pcrel_offset */
849 /* Get to the page for the GOT entry for the symbol
850 (G(S) - P) using an ADRP instruction. */
851 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
853 2, /* size (0 = byte, 1 = short, 2 = long) */
855 TRUE, /* pc_relative */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
860 FALSE, /* partial_inplace */
861 0x1fffff, /* src_mask */
862 0x1fffff, /* dst_mask */
863 TRUE), /* pcrel_offset */
865 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
866 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
870 FALSE, /* pc_relative */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
875 FALSE, /* partial_inplace */
876 0xfff, /* src_mask */
877 0xfff, /* dst_mask */
878 FALSE), /* pcrel_offset */
880 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
882 2, /* size (0 = byte, 1 = short, 2 = long) */
884 FALSE, /* pc_relative */
886 complain_overflow_dont, /* complain_on_overflow */
887 bfd_elf_generic_reloc, /* special_function */
888 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
889 FALSE, /* partial_inplace */
890 0xffff, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
894 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
898 FALSE, /* pc_relative */
900 complain_overflow_dont, /* complain_on_overflow */
901 bfd_elf_generic_reloc, /* special_function */
902 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
903 FALSE, /* partial_inplace */
904 0xffff, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
908 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
910 2, /* size (0 = byte, 1 = short, 2 = long) */
912 FALSE, /* pc_relative */
914 complain_overflow_dont, /* complain_on_overflow */
915 bfd_elf_generic_reloc, /* special_function */
916 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
917 FALSE, /* partial_inplace */
918 0x1fffff, /* src_mask */
919 0x1fffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
922 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
924 2, /* size (0 = byte, 1 = short, 2 = long) */
926 FALSE, /* pc_relative */
928 complain_overflow_dont, /* complain_on_overflow */
929 bfd_elf_generic_reloc, /* special_function */
930 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
931 FALSE, /* partial_inplace */
932 0xff8, /* src_mask */
933 0xff8, /* dst_mask */
934 FALSE), /* pcrel_offset */
936 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
940 FALSE, /* pc_relative */
942 complain_overflow_dont, /* complain_on_overflow */
943 bfd_elf_generic_reloc, /* special_function */
944 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
945 FALSE, /* partial_inplace */
946 0xffc, /* src_mask */
947 0xffc, /* dst_mask */
948 FALSE), /* pcrel_offset */
950 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
952 2, /* size (0 = byte, 1 = short, 2 = long) */
954 FALSE, /* pc_relative */
956 complain_overflow_dont, /* complain_on_overflow */
957 bfd_elf_generic_reloc, /* special_function */
958 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
959 FALSE, /* partial_inplace */
960 0x1ffffc, /* src_mask */
961 0x1ffffc, /* dst_mask */
962 FALSE), /* pcrel_offset */
964 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
966 2, /* size (0 = byte, 1 = short, 2 = long) */
968 FALSE, /* pc_relative */
970 complain_overflow_dont, /* complain_on_overflow */
971 bfd_elf_generic_reloc, /* special_function */
972 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
973 FALSE, /* partial_inplace */
974 0xffff, /* src_mask */
975 0xffff, /* dst_mask */
976 FALSE), /* pcrel_offset */
978 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
980 2, /* size (0 = byte, 1 = short, 2 = long) */
982 FALSE, /* pc_relative */
984 complain_overflow_dont, /* complain_on_overflow */
985 bfd_elf_generic_reloc, /* special_function */
986 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
987 FALSE, /* partial_inplace */
988 0xffff, /* src_mask */
989 0xffff, /* dst_mask */
990 FALSE), /* pcrel_offset */
992 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
994 2, /* size (0 = byte, 1 = short, 2 = long) */
996 FALSE, /* pc_relative */
998 complain_overflow_dont, /* complain_on_overflow */
999 bfd_elf_generic_reloc, /* special_function */
1000 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1001 FALSE, /* partial_inplace */
1002 0xffff, /* src_mask */
1003 0xffff, /* dst_mask */
1004 FALSE), /* pcrel_offset */
1006 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1008 2, /* size (0 = byte, 1 = short, 2 = long) */
1010 FALSE, /* pc_relative */
1012 complain_overflow_dont, /* complain_on_overflow */
1013 bfd_elf_generic_reloc, /* special_function */
1014 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1015 FALSE, /* partial_inplace */
1016 0xffff, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1020 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1022 2, /* size (0 = byte, 1 = short, 2 = long) */
1024 FALSE, /* pc_relative */
1026 complain_overflow_dont, /* complain_on_overflow */
1027 bfd_elf_generic_reloc, /* special_function */
1028 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1029 FALSE, /* partial_inplace */
1030 0xffff, /* src_mask */
1031 0xffff, /* dst_mask */
1032 FALSE), /* pcrel_offset */
1034 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1035 12, /* rightshift */
1036 2, /* size (0 = byte, 1 = short, 2 = long) */
1038 FALSE, /* pc_relative */
1040 complain_overflow_dont, /* complain_on_overflow */
1041 bfd_elf_generic_reloc, /* special_function */
1042 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1043 FALSE, /* partial_inplace */
1044 0xfff, /* src_mask */
1045 0xfff, /* dst_mask */
1046 FALSE), /* pcrel_offset */
1048 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1050 2, /* size (0 = byte, 1 = short, 2 = long) */
1052 FALSE, /* pc_relative */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 bfd_elf_generic_reloc, /* special_function */
1056 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1057 FALSE, /* partial_inplace */
1058 0xfff, /* src_mask */
1059 0xfff, /* dst_mask */
1060 FALSE), /* pcrel_offset */
1062 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1064 2, /* size (0 = byte, 1 = short, 2 = long) */
1066 FALSE, /* pc_relative */
1068 complain_overflow_dont, /* complain_on_overflow */
1069 bfd_elf_generic_reloc, /* special_function */
1070 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1071 FALSE, /* partial_inplace */
1072 0xfff, /* src_mask */
1073 0xfff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1076 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1078 2, /* size (0 = byte, 1 = short, 2 = long) */
1080 TRUE, /* pc_relative */
1082 complain_overflow_dont, /* complain_on_overflow */
1083 bfd_elf_generic_reloc, /* special_function */
1084 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1085 FALSE, /* partial_inplace */
1086 0x1ffffc, /* src_mask */
1087 0x1ffffc, /* dst_mask */
1088 TRUE), /* pcrel_offset */
1090 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1092 2, /* size (0 = byte, 1 = short, 2 = long) */
1094 TRUE, /* pc_relative */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 bfd_elf_generic_reloc, /* special_function */
1098 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1099 FALSE, /* partial_inplace */
1100 0x1fffff, /* src_mask */
1101 0x1fffff, /* dst_mask */
1102 TRUE), /* pcrel_offset */
1104 /* Get to the page for the GOT entry for the symbol
1105 (G(S) - P) using an ADRP instruction. */
1106 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1107 12, /* rightshift */
1108 2, /* size (0 = byte, 1 = short, 2 = long) */
1110 TRUE, /* pc_relative */
1112 complain_overflow_dont, /* complain_on_overflow */
1113 bfd_elf_generic_reloc, /* special_function */
1114 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1115 FALSE, /* partial_inplace */
1116 0x1fffff, /* src_mask */
1117 0x1fffff, /* dst_mask */
1118 TRUE), /* pcrel_offset */
1120 /* LD64: GOT offset G(S) & 0xff8. */
1121 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1123 2, /* size (0 = byte, 1 = short, 2 = long) */
1125 FALSE, /* pc_relative */
1127 complain_overflow_dont, /* complain_on_overflow */
1128 bfd_elf_generic_reloc, /* special_function */
1129 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1130 FALSE, /* partial_inplace */
1131 0xff8, /* src_mask */
1132 0xff8, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1135 /* LD32: GOT offset G(S) & 0xffc. */
1136 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1138 2, /* size (0 = byte, 1 = short, 2 = long) */
1140 FALSE, /* pc_relative */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 bfd_elf_generic_reloc, /* special_function */
1144 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1145 FALSE, /* partial_inplace */
1146 0xffc, /* src_mask */
1147 0xffc, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1150 /* ADD: GOT offset G(S) & 0xfff. */
1151 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1153 2, /* size (0 = byte, 1 = short, 2 = long) */
1155 FALSE, /* pc_relative */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 bfd_elf_generic_reloc, /* special_function */
1159 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1160 FALSE, /* partial_inplace */
1161 0xfff, /* src_mask */
1162 0xfff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1165 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1166 16, /* rightshift */
1167 2, /* size (0 = byte, 1 = short, 2 = long) */
1169 FALSE, /* pc_relative */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 bfd_elf_generic_reloc, /* special_function */
1173 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1174 FALSE, /* partial_inplace */
1175 0xffff, /* src_mask */
1176 0xffff, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1179 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1181 2, /* size (0 = byte, 1 = short, 2 = long) */
1183 FALSE, /* pc_relative */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 bfd_elf_generic_reloc, /* special_function */
1187 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1188 FALSE, /* partial_inplace */
1189 0xffff, /* src_mask */
1190 0xffff, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1193 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1195 2, /* size (0 = byte, 1 = short, 2 = long) */
1197 FALSE, /* pc_relative */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 bfd_elf_generic_reloc, /* special_function */
1201 AARCH64_R_STR (TLSDESC_LDR), /* name */
1202 FALSE, /* partial_inplace */
1205 FALSE), /* pcrel_offset */
1207 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1209 2, /* size (0 = byte, 1 = short, 2 = long) */
1211 FALSE, /* pc_relative */
1213 complain_overflow_dont, /* complain_on_overflow */
1214 bfd_elf_generic_reloc, /* special_function */
1215 AARCH64_R_STR (TLSDESC_ADD), /* name */
1216 FALSE, /* partial_inplace */
1219 FALSE), /* pcrel_offset */
1221 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1223 2, /* size (0 = byte, 1 = short, 2 = long) */
1225 FALSE, /* pc_relative */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 bfd_elf_generic_reloc, /* special_function */
1229 AARCH64_R_STR (TLSDESC_CALL), /* name */
1230 FALSE, /* partial_inplace */
1233 FALSE), /* pcrel_offset */
1235 HOWTO (AARCH64_R (COPY), /* type */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1239 FALSE, /* pc_relative */
1241 complain_overflow_bitfield, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 AARCH64_R_STR (COPY), /* name */
1244 TRUE, /* partial_inplace */
1245 0xffffffff, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1249 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1251 2, /* size (0 = byte, 1 = short, 2 = long) */
1253 FALSE, /* pc_relative */
1255 complain_overflow_bitfield, /* complain_on_overflow */
1256 bfd_elf_generic_reloc, /* special_function */
1257 AARCH64_R_STR (GLOB_DAT), /* name */
1258 TRUE, /* partial_inplace */
1259 0xffffffff, /* src_mask */
1260 0xffffffff, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1263 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1265 2, /* size (0 = byte, 1 = short, 2 = long) */
1267 FALSE, /* pc_relative */
1269 complain_overflow_bitfield, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 AARCH64_R_STR (JUMP_SLOT), /* name */
1272 TRUE, /* partial_inplace */
1273 0xffffffff, /* src_mask */
1274 0xffffffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1277 HOWTO (AARCH64_R (RELATIVE), /* type */
1279 2, /* size (0 = byte, 1 = short, 2 = long) */
1281 FALSE, /* pc_relative */
1283 complain_overflow_bitfield, /* complain_on_overflow */
1284 bfd_elf_generic_reloc, /* special_function */
1285 AARCH64_R_STR (RELATIVE), /* name */
1286 TRUE, /* partial_inplace */
1287 ALL_ONES, /* src_mask */
1288 ALL_ONES, /* dst_mask */
1289 FALSE), /* pcrel_offset */
1291 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1293 2, /* size (0 = byte, 1 = short, 2 = long) */
1295 FALSE, /* pc_relative */
1297 complain_overflow_dont, /* complain_on_overflow */
1298 bfd_elf_generic_reloc, /* special_function */
1299 AARCH64_R_STR (TLS_DTPMOD), /* name */
1300 FALSE, /* partial_inplace */
1302 ALL_ONES, /* dst_mask */
1303 FALSE), /* pc_reloffset */
1305 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1307 2, /* size (0 = byte, 1 = short, 2 = long) */
1309 FALSE, /* pc_relative */
1311 complain_overflow_dont, /* complain_on_overflow */
1312 bfd_elf_generic_reloc, /* special_function */
1313 AARCH64_R_STR (TLS_DTPREL), /* name */
1314 FALSE, /* partial_inplace */
1316 ALL_ONES, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1319 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1321 2, /* size (0 = byte, 1 = short, 2 = long) */
1323 FALSE, /* pc_relative */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 bfd_elf_generic_reloc, /* special_function */
1327 AARCH64_R_STR (TLS_TPREL), /* name */
1328 FALSE, /* partial_inplace */
1330 ALL_ONES, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1333 HOWTO (AARCH64_R (TLSDESC), /* type */
1335 2, /* size (0 = byte, 1 = short, 2 = long) */
1337 FALSE, /* pc_relative */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 bfd_elf_generic_reloc, /* special_function */
1341 AARCH64_R_STR (TLSDESC), /* name */
1342 FALSE, /* partial_inplace */
1344 ALL_ONES, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1347 HOWTO (AARCH64_R (IRELATIVE), /* type */
1349 2, /* size (0 = byte, 1 = short, 2 = long) */
1351 FALSE, /* pc_relative */
1353 complain_overflow_bitfield, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 AARCH64_R_STR (IRELATIVE), /* name */
1356 FALSE, /* partial_inplace */
1358 ALL_ONES, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1364 static reloc_howto_type elfNN_aarch64_howto_none =
1365 HOWTO (R_AARCH64_NONE, /* type */
1367 0, /* size (0 = byte, 1 = short, 2 = long) */
1369 FALSE, /* pc_relative */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_AARCH64_NONE", /* name */
1374 FALSE, /* partial_inplace */
1377 FALSE); /* pcrel_offset */
1379 /* Given HOWTO, return the bfd internal relocation enumerator. */
1381 static bfd_reloc_code_real_type
1382 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1385 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1386 const ptrdiff_t offset
1387 = howto - elfNN_aarch64_howto_table;
1389 if (offset > 0 && offset < size - 1)
1390 return BFD_RELOC_AARCH64_RELOC_START + offset;
1392 if (howto == &elfNN_aarch64_howto_none)
1393 return BFD_RELOC_AARCH64_NONE;
1395 return BFD_RELOC_AARCH64_RELOC_START;
1398 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1400 static bfd_reloc_code_real_type
1401 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1403 static bfd_boolean initialized_p = FALSE;
1404 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1405 static unsigned int offsets[R_AARCH64_end];
1407 if (initialized_p == FALSE)
1411 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1412 if (elfNN_aarch64_howto_table[i].type != 0)
1413 offsets[elfNN_aarch64_howto_table[i].type] = i;
1415 initialized_p = TRUE;
1418 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1419 return BFD_RELOC_AARCH64_NONE;
1421 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1424 struct elf_aarch64_reloc_map
1426 bfd_reloc_code_real_type from;
1427 bfd_reloc_code_real_type to;
1430 /* Map bfd generic reloc to AArch64-specific reloc. */
1431 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1433 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1435 /* Basic data relocations. */
1436 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1437 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1438 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1439 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1440 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1441 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1442 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1445 /* Given the bfd internal relocation enumerator in CODE, return the
1446 corresponding howto entry. */
1448 static reloc_howto_type *
1449 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1453 /* Convert bfd generic reloc to AArch64-specific reloc. */
1454 if (code < BFD_RELOC_AARCH64_RELOC_START
1455 || code > BFD_RELOC_AARCH64_RELOC_END)
1456 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1457 if (elf_aarch64_reloc_map[i].from == code)
1459 code = elf_aarch64_reloc_map[i].to;
1463 if (code > BFD_RELOC_AARCH64_RELOC_START
1464 && code < BFD_RELOC_AARCH64_RELOC_END)
1465 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1466 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1468 if (code == BFD_RELOC_AARCH64_NONE)
1469 return &elfNN_aarch64_howto_none;
1474 static reloc_howto_type *
1475 elfNN_aarch64_howto_from_type (unsigned int r_type)
1477 bfd_reloc_code_real_type val;
1478 reloc_howto_type *howto;
1483 bfd_set_error (bfd_error_bad_value);
1488 if (r_type == R_AARCH64_NONE)
1489 return &elfNN_aarch64_howto_none;
1491 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1492 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1497 bfd_set_error (bfd_error_bad_value);
1502 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1503 Elf_Internal_Rela *elf_reloc)
1505 unsigned int r_type;
1507 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1508 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1511 static reloc_howto_type *
1512 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1513 bfd_reloc_code_real_type code)
1515 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1520 bfd_set_error (bfd_error_bad_value);
1524 static reloc_howto_type *
1525 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1530 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1531 if (elfNN_aarch64_howto_table[i].name != NULL
1532 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1533 return &elfNN_aarch64_howto_table[i];
1538 #define TARGET_LITTLE_SYM bfd_elfNN_littleaarch64_vec
1539 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1540 #define TARGET_BIG_SYM bfd_elfNN_bigaarch64_vec
1541 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1543 /* The linker script knows the section names for placement.
1544 The entry_names are used to do simple name mangling on the stubs.
1545 Given a function name, and its type, the stub can be found. The
1546 name can be changed. The only requirement is the %s be present. */
1547 #define STUB_ENTRY_NAME "__%s_veneer"
1549 /* The name of the dynamic interpreter. This is put in the .interp
1551 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1553 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1554 (((1 << 25) - 1) << 2)
1555 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1558 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1559 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1562 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1564 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1565 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
1569 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
1571 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
1572 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
1573 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
1576 static const uint32_t aarch64_adrp_branch_stub [] =
1578 0x90000010, /* adrp ip0, X */
1579 /* R_AARCH64_ADR_HI21_PCREL(X) */
1580 0x91000210, /* add ip0, ip0, :lo12:X */
1581 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
1582 0xd61f0200, /* br ip0 */
1585 static const uint32_t aarch64_long_branch_stub[] =
1588 0x58000090, /* ldr ip0, 1f */
1590 0x18000090, /* ldr wip0, 1f */
1592 0x10000011, /* adr ip1, #0 */
1593 0x8b110210, /* add ip0, ip0, ip1 */
1594 0xd61f0200, /* br ip0 */
1595 0x00000000, /* 1: .xword or .word
1596 R_AARCH64_PRELNN(X) + 12
1601 /* Section name for stubs is the associated section name plus this
1603 #define STUB_SUFFIX ".stub"
1605 enum elf_aarch64_stub_type
1608 aarch64_stub_adrp_branch,
1609 aarch64_stub_long_branch,
1612 struct elf_aarch64_stub_hash_entry
1614 /* Base hash table entry structure. */
1615 struct bfd_hash_entry root;
1617 /* The stub section. */
1620 /* Offset within stub_sec of the beginning of this stub. */
1621 bfd_vma stub_offset;
1623 /* Given the symbol's value and its section we can determine its final
1624 value when building the stubs (so the stub knows where to jump). */
1625 bfd_vma target_value;
1626 asection *target_section;
1628 enum elf_aarch64_stub_type stub_type;
1630 /* The symbol table entry, if any, that this was derived from. */
1631 struct elf_aarch64_link_hash_entry *h;
1633 /* Destination symbol type */
1634 unsigned char st_type;
1636 /* Where this stub is being called from, or, in the case of combined
1637 stub sections, the first input section in the group. */
1640 /* The name for the local symbol at the start of this stub. The
1641 stub name in the hash table has to be unique; this does not, so
1642 it can be friendlier. */
1646 /* Used to build a map of a section. This is required for mixed-endian
1649 typedef struct elf_elf_section_map
1654 elf_aarch64_section_map;
1657 typedef struct _aarch64_elf_section_data
1659 struct bfd_elf_section_data elf;
1660 unsigned int mapcount;
1661 unsigned int mapsize;
1662 elf_aarch64_section_map *map;
1664 _aarch64_elf_section_data;
1666 #define elf_aarch64_section_data(sec) \
1667 ((_aarch64_elf_section_data *) elf_section_data (sec))
1669 /* The size of the thread control block. */
1672 struct elf_aarch64_local_symbol
1674 unsigned int got_type;
1675 bfd_signed_vma got_refcount;
1678 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1679 offset is from the end of the jump table and reserved entries
1682 The magic value (bfd_vma) -1 indicates that an offset has not be
1684 bfd_vma tlsdesc_got_jump_table_offset;
1687 struct elf_aarch64_obj_tdata
1689 struct elf_obj_tdata root;
1691 /* local symbol descriptors */
1692 struct elf_aarch64_local_symbol *locals;
1694 /* Zero to warn when linking objects with incompatible enum sizes. */
1695 int no_enum_size_warning;
1697 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1698 int no_wchar_size_warning;
1701 #define elf_aarch64_tdata(bfd) \
1702 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1704 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1706 #define is_aarch64_elf(bfd) \
1707 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1708 && elf_tdata (bfd) != NULL \
1709 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1712 elfNN_aarch64_mkobject (bfd *abfd)
1714 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1718 #define elf_aarch64_hash_entry(ent) \
1719 ((struct elf_aarch64_link_hash_entry *)(ent))
1721 #define GOT_UNKNOWN 0
1722 #define GOT_NORMAL 1
1723 #define GOT_TLS_GD 2
1724 #define GOT_TLS_IE 4
1725 #define GOT_TLSDESC_GD 8
1727 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1729 /* AArch64 ELF linker hash entry. */
1730 struct elf_aarch64_link_hash_entry
1732 struct elf_link_hash_entry root;
1734 /* Track dynamic relocs copied for this symbol. */
1735 struct elf_dyn_relocs *dyn_relocs;
1737 /* Since PLT entries have variable size, we need to record the
1738 index into .got.plt instead of recomputing it from the PLT
1740 bfd_signed_vma plt_got_offset;
1742 /* Bit mask representing the type of GOT entry(s) if any required by
1744 unsigned int got_type;
1746 /* A pointer to the most recently used stub hash entry against this
1748 struct elf_aarch64_stub_hash_entry *stub_cache;
1750 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1751 is from the end of the jump table and reserved entries within the PLTGOT.
1753 The magic value (bfd_vma) -1 indicates that an offset has not
1755 bfd_vma tlsdesc_got_jump_table_offset;
1759 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1761 unsigned long r_symndx)
1764 return elf_aarch64_hash_entry (h)->got_type;
1766 if (! elf_aarch64_locals (abfd))
1769 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1772 /* Get the AArch64 elf linker hash table from a link_info structure. */
1773 #define elf_aarch64_hash_table(info) \
1774 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1776 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1777 ((struct elf_aarch64_stub_hash_entry *) \
1778 bfd_hash_lookup ((table), (string), (create), (copy)))
1780 /* AArch64 ELF linker hash table. */
1781 struct elf_aarch64_link_hash_table
1783 /* The main hash table. */
1784 struct elf_link_hash_table root;
1786 /* Nonzero to force PIC branch veneers. */
1789 /* The number of bytes in the initial entry in the PLT. */
1790 bfd_size_type plt_header_size;
1792 /* The number of bytes in the subsequent PLT etries. */
1793 bfd_size_type plt_entry_size;
1795 /* Short-cuts to get to dynamic linker sections. */
1799 /* Small local sym cache. */
1800 struct sym_cache sym_cache;
1802 /* For convenience in allocate_dynrelocs. */
1805 /* The amount of space used by the reserved portion of the sgotplt
1806 section, plus whatever space is used by the jump slots. */
1807 bfd_vma sgotplt_jump_table_size;
1809 /* The stub hash table. */
1810 struct bfd_hash_table stub_hash_table;
1812 /* Linker stub bfd. */
1815 /* Linker call-backs. */
1816 asection *(*add_stub_section) (const char *, asection *);
1817 void (*layout_sections_again) (void);
1819 /* Array to keep track of which stub sections have been created, and
1820 information on stub grouping. */
1823 /* This is the section to which stubs in the group will be
1826 /* The stub section. */
1830 /* Assorted information used by elfNN_aarch64_size_stubs. */
1831 unsigned int bfd_count;
1833 asection **input_list;
1835 /* The offset into splt of the PLT entry for the TLS descriptor
1836 resolver. Special values are 0, if not necessary (or not found
1837 to be necessary yet), and -1 if needed but not determined
1839 bfd_vma tlsdesc_plt;
1841 /* The GOT offset for the lazy trampoline. Communicated to the
1842 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
1843 indicates an offset is not allocated. */
1844 bfd_vma dt_tlsdesc_got;
1847 /* Create an entry in an AArch64 ELF linker hash table. */
1849 static struct bfd_hash_entry *
1850 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
1851 struct bfd_hash_table *table,
1854 struct elf_aarch64_link_hash_entry *ret =
1855 (struct elf_aarch64_link_hash_entry *) entry;
1857 /* Allocate the structure if it has not already been allocated by a
1860 ret = bfd_hash_allocate (table,
1861 sizeof (struct elf_aarch64_link_hash_entry));
1863 return (struct bfd_hash_entry *) ret;
1865 /* Call the allocation method of the superclass. */
1866 ret = ((struct elf_aarch64_link_hash_entry *)
1867 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1871 ret->dyn_relocs = NULL;
1872 ret->got_type = GOT_UNKNOWN;
1873 ret->plt_got_offset = (bfd_vma) - 1;
1874 ret->stub_cache = NULL;
1875 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
1878 return (struct bfd_hash_entry *) ret;
1881 /* Initialize an entry in the stub hash table. */
1883 static struct bfd_hash_entry *
1884 stub_hash_newfunc (struct bfd_hash_entry *entry,
1885 struct bfd_hash_table *table, const char *string)
1887 /* Allocate the structure if it has not already been allocated by a
1891 entry = bfd_hash_allocate (table,
1893 elf_aarch64_stub_hash_entry));
1898 /* Call the allocation method of the superclass. */
1899 entry = bfd_hash_newfunc (entry, table, string);
1902 struct elf_aarch64_stub_hash_entry *eh;
1904 /* Initialize the local fields. */
1905 eh = (struct elf_aarch64_stub_hash_entry *) entry;
1906 eh->stub_sec = NULL;
1907 eh->stub_offset = 0;
1908 eh->target_value = 0;
1909 eh->target_section = NULL;
1910 eh->stub_type = aarch64_stub_none;
1919 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1922 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
1923 struct elf_link_hash_entry *dir,
1924 struct elf_link_hash_entry *ind)
1926 struct elf_aarch64_link_hash_entry *edir, *eind;
1928 edir = (struct elf_aarch64_link_hash_entry *) dir;
1929 eind = (struct elf_aarch64_link_hash_entry *) ind;
1931 if (eind->dyn_relocs != NULL)
1933 if (edir->dyn_relocs != NULL)
1935 struct elf_dyn_relocs **pp;
1936 struct elf_dyn_relocs *p;
1938 /* Add reloc counts against the indirect sym to the direct sym
1939 list. Merge any entries against the same section. */
1940 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
1942 struct elf_dyn_relocs *q;
1944 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1945 if (q->sec == p->sec)
1947 q->pc_count += p->pc_count;
1948 q->count += p->count;
1955 *pp = edir->dyn_relocs;
1958 edir->dyn_relocs = eind->dyn_relocs;
1959 eind->dyn_relocs = NULL;
1962 if (ind->root.type == bfd_link_hash_indirect)
1964 /* Copy over PLT info. */
1965 if (dir->got.refcount <= 0)
1967 edir->got_type = eind->got_type;
1968 eind->got_type = GOT_UNKNOWN;
1972 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1975 /* Create an AArch64 elf linker hash table. */
1977 static struct bfd_link_hash_table *
1978 elfNN_aarch64_link_hash_table_create (bfd *abfd)
1980 struct elf_aarch64_link_hash_table *ret;
1981 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
1983 ret = bfd_zmalloc (amt);
1987 if (!_bfd_elf_link_hash_table_init
1988 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
1989 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
1995 ret->plt_header_size = PLT_ENTRY_SIZE;
1996 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
1998 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2000 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2001 sizeof (struct elf_aarch64_stub_hash_entry)))
2007 return &ret->root.root;
2010 /* Free the derived linker hash table. */
2013 elfNN_aarch64_hash_table_free (struct bfd_link_hash_table *hash)
2015 struct elf_aarch64_link_hash_table *ret
2016 = (struct elf_aarch64_link_hash_table *) hash;
2018 bfd_hash_table_free (&ret->stub_hash_table);
2019 _bfd_elf_link_hash_table_free (hash);
2023 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2024 bfd_vma offset, bfd_vma value)
2026 reloc_howto_type *howto;
2029 howto = elfNN_aarch64_howto_from_type (r_type);
2030 place = (input_section->output_section->vma + input_section->output_offset
2033 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2034 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2035 return _bfd_aarch64_elf_put_addend (input_bfd,
2036 input_section->contents + offset, r_type,
2040 static enum elf_aarch64_stub_type
2041 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2043 if (aarch64_valid_for_adrp_p (value, place))
2044 return aarch64_stub_adrp_branch;
2045 return aarch64_stub_long_branch;
2048 /* Determine the type of stub needed, if any, for a call. */
2050 static enum elf_aarch64_stub_type
2051 aarch64_type_of_stub (struct bfd_link_info *info,
2052 asection *input_sec,
2053 const Elf_Internal_Rela *rel,
2054 unsigned char st_type,
2055 struct elf_aarch64_link_hash_entry *hash,
2056 bfd_vma destination)
2059 bfd_signed_vma branch_offset;
2060 unsigned int r_type;
2061 struct elf_aarch64_link_hash_table *globals;
2062 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2063 bfd_boolean via_plt_p;
2065 if (st_type != STT_FUNC)
2068 globals = elf_aarch64_hash_table (info);
2069 via_plt_p = (globals->root.splt != NULL && hash != NULL
2070 && hash->root.plt.offset != (bfd_vma) - 1);
2075 /* Determine where the call point is. */
2076 location = (input_sec->output_offset
2077 + input_sec->output_section->vma + rel->r_offset);
2079 branch_offset = (bfd_signed_vma) (destination - location);
2081 r_type = ELFNN_R_TYPE (rel->r_info);
2083 /* We don't want to redirect any old unconditional jump in this way,
2084 only one which is being used for a sibcall, where it is
2085 acceptable for the IP0 and IP1 registers to be clobbered. */
2086 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2087 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2088 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2090 stub_type = aarch64_stub_long_branch;
2096 /* Build a name for an entry in the stub hash table. */
2099 elfNN_aarch64_stub_name (const asection *input_section,
2100 const asection *sym_sec,
2101 const struct elf_aarch64_link_hash_entry *hash,
2102 const Elf_Internal_Rela *rel)
2109 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2110 stub_name = bfd_malloc (len);
2111 if (stub_name != NULL)
2112 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2113 (unsigned int) input_section->id,
2114 hash->root.root.root.string,
2119 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2120 stub_name = bfd_malloc (len);
2121 if (stub_name != NULL)
2122 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2123 (unsigned int) input_section->id,
2124 (unsigned int) sym_sec->id,
2125 (unsigned int) ELFNN_R_SYM (rel->r_info),
2132 /* Look up an entry in the stub hash. Stub entries are cached because
2133 creating the stub name takes a bit of time. */
2135 static struct elf_aarch64_stub_hash_entry *
2136 elfNN_aarch64_get_stub_entry (const asection *input_section,
2137 const asection *sym_sec,
2138 struct elf_link_hash_entry *hash,
2139 const Elf_Internal_Rela *rel,
2140 struct elf_aarch64_link_hash_table *htab)
2142 struct elf_aarch64_stub_hash_entry *stub_entry;
2143 struct elf_aarch64_link_hash_entry *h =
2144 (struct elf_aarch64_link_hash_entry *) hash;
2145 const asection *id_sec;
2147 if ((input_section->flags & SEC_CODE) == 0)
2150 /* If this input section is part of a group of sections sharing one
2151 stub section, then use the id of the first section in the group.
2152 Stub names need to include a section id, as there may well be
2153 more than one stub used to reach say, printf, and we need to
2154 distinguish between them. */
2155 id_sec = htab->stub_group[input_section->id].link_sec;
2157 if (h != NULL && h->stub_cache != NULL
2158 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2160 stub_entry = h->stub_cache;
2166 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2167 if (stub_name == NULL)
2170 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2171 stub_name, FALSE, FALSE);
2173 h->stub_cache = stub_entry;
2181 /* Add a new stub entry to the stub hash. Not all fields of the new
2182 stub entry are initialised. */
2184 static struct elf_aarch64_stub_hash_entry *
2185 elfNN_aarch64_add_stub (const char *stub_name,
2187 struct elf_aarch64_link_hash_table *htab)
2191 struct elf_aarch64_stub_hash_entry *stub_entry;
2193 link_sec = htab->stub_group[section->id].link_sec;
2194 stub_sec = htab->stub_group[section->id].stub_sec;
2195 if (stub_sec == NULL)
2197 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2198 if (stub_sec == NULL)
2204 namelen = strlen (link_sec->name);
2205 len = namelen + sizeof (STUB_SUFFIX);
2206 s_name = bfd_alloc (htab->stub_bfd, len);
2210 memcpy (s_name, link_sec->name, namelen);
2211 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2212 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2213 if (stub_sec == NULL)
2215 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2217 htab->stub_group[section->id].stub_sec = stub_sec;
2220 /* Enter this entry into the linker stub hash table. */
2221 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2223 if (stub_entry == NULL)
2225 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2226 section->owner, stub_name);
2230 stub_entry->stub_sec = stub_sec;
2231 stub_entry->stub_offset = 0;
2232 stub_entry->id_sec = link_sec;
2238 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2239 void *in_arg ATTRIBUTE_UNUSED)
2241 struct elf_aarch64_stub_hash_entry *stub_entry;
2246 unsigned int template_size;
2247 const uint32_t *template;
2250 /* Massage our args to the form they really have. */
2251 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2253 stub_sec = stub_entry->stub_sec;
2255 /* Make a note of the offset within the stubs for this entry. */
2256 stub_entry->stub_offset = stub_sec->size;
2257 loc = stub_sec->contents + stub_entry->stub_offset;
2259 stub_bfd = stub_sec->owner;
2261 /* This is the address of the stub destination. */
2262 sym_value = (stub_entry->target_value
2263 + stub_entry->target_section->output_offset
2264 + stub_entry->target_section->output_section->vma);
2266 if (stub_entry->stub_type == aarch64_stub_long_branch)
2268 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2269 + stub_sec->output_offset);
2271 /* See if we can relax the stub. */
2272 if (aarch64_valid_for_adrp_p (sym_value, place))
2273 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2276 switch (stub_entry->stub_type)
2278 case aarch64_stub_adrp_branch:
2279 template = aarch64_adrp_branch_stub;
2280 template_size = sizeof (aarch64_adrp_branch_stub);
2282 case aarch64_stub_long_branch:
2283 template = aarch64_long_branch_stub;
2284 template_size = sizeof (aarch64_long_branch_stub);
2291 for (i = 0; i < (template_size / sizeof template[0]); i++)
2293 bfd_putl32 (template[i], loc);
2297 template_size = (template_size + 7) & ~7;
2298 stub_sec->size += template_size;
2300 switch (stub_entry->stub_type)
2302 case aarch64_stub_adrp_branch:
2303 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2304 stub_entry->stub_offset, sym_value))
2305 /* The stub would not have been relaxed if the offset was out
2309 _bfd_final_link_relocate
2310 (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)),
2314 stub_entry->stub_offset + 4,
2319 case aarch64_stub_long_branch:
2320 /* We want the value relative to the address 12 bytes back from the
2322 _bfd_final_link_relocate (elfNN_aarch64_howto_from_type
2323 (AARCH64_R (PRELNN)), stub_bfd, stub_sec,
2325 stub_entry->stub_offset + 16,
2335 /* As above, but don't actually build the stub. Just bump offset so
2336 we know stub section sizes. */
2339 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2340 void *in_arg ATTRIBUTE_UNUSED)
2342 struct elf_aarch64_stub_hash_entry *stub_entry;
2345 /* Massage our args to the form they really have. */
2346 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2348 switch (stub_entry->stub_type)
2350 case aarch64_stub_adrp_branch:
2351 size = sizeof (aarch64_adrp_branch_stub);
2353 case aarch64_stub_long_branch:
2354 size = sizeof (aarch64_long_branch_stub);
2362 size = (size + 7) & ~7;
2363 stub_entry->stub_sec->size += size;
2367 /* External entry points for sizing and building linker stubs. */
2369 /* Set up various things so that we can make a list of input sections
2370 for each output section included in the link. Returns -1 on error,
2371 0 when no stubs will be needed, and 1 on success. */
2374 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2375 struct bfd_link_info *info)
2378 unsigned int bfd_count;
2379 int top_id, top_index;
2381 asection **input_list, **list;
2383 struct elf_aarch64_link_hash_table *htab =
2384 elf_aarch64_hash_table (info);
2386 if (!is_elf_hash_table (htab))
2389 /* Count the number of input BFDs and find the top input section id. */
2390 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2391 input_bfd != NULL; input_bfd = input_bfd->link_next)
2394 for (section = input_bfd->sections;
2395 section != NULL; section = section->next)
2397 if (top_id < section->id)
2398 top_id = section->id;
2401 htab->bfd_count = bfd_count;
2403 amt = sizeof (struct map_stub) * (top_id + 1);
2404 htab->stub_group = bfd_zmalloc (amt);
2405 if (htab->stub_group == NULL)
2408 /* We can't use output_bfd->section_count here to find the top output
2409 section index as some sections may have been removed, and
2410 _bfd_strip_section_from_output doesn't renumber the indices. */
2411 for (section = output_bfd->sections, top_index = 0;
2412 section != NULL; section = section->next)
2414 if (top_index < section->index)
2415 top_index = section->index;
2418 htab->top_index = top_index;
2419 amt = sizeof (asection *) * (top_index + 1);
2420 input_list = bfd_malloc (amt);
2421 htab->input_list = input_list;
2422 if (input_list == NULL)
2425 /* For sections we aren't interested in, mark their entries with a
2426 value we can check later. */
2427 list = input_list + top_index;
2429 *list = bfd_abs_section_ptr;
2430 while (list-- != input_list);
2432 for (section = output_bfd->sections;
2433 section != NULL; section = section->next)
2435 if ((section->flags & SEC_CODE) != 0)
2436 input_list[section->index] = NULL;
2442 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2443 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2445 /* The linker repeatedly calls this function for each input section,
2446 in the order that input sections are linked into output sections.
2447 Build lists of input sections to determine groupings between which
2448 we may insert linker stubs. */
2451 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2453 struct elf_aarch64_link_hash_table *htab =
2454 elf_aarch64_hash_table (info);
2456 if (isec->output_section->index <= htab->top_index)
2458 asection **list = htab->input_list + isec->output_section->index;
2460 if (*list != bfd_abs_section_ptr)
2462 /* Steal the link_sec pointer for our list. */
2463 /* This happens to make the list in reverse order,
2464 which is what we want. */
2465 PREV_SEC (isec) = *list;
2471 /* See whether we can group stub sections together. Grouping stub
2472 sections may result in fewer stubs. More importantly, we need to
2473 put all .init* and .fini* stubs at the beginning of the .init or
2474 .fini output sections respectively, because glibc splits the
2475 _init and _fini functions into multiple parts. Putting a stub in
2476 the middle of a function is not a good idea. */
2479 group_sections (struct elf_aarch64_link_hash_table *htab,
2480 bfd_size_type stub_group_size,
2481 bfd_boolean stubs_always_before_branch)
2483 asection **list = htab->input_list + htab->top_index;
2487 asection *tail = *list;
2489 if (tail == bfd_abs_section_ptr)
2492 while (tail != NULL)
2496 bfd_size_type total;
2500 while ((prev = PREV_SEC (curr)) != NULL
2501 && ((total += curr->output_offset - prev->output_offset)
2505 /* OK, the size from the start of CURR to the end is less
2506 than stub_group_size and thus can be handled by one stub
2507 section. (Or the tail section is itself larger than
2508 stub_group_size, in which case we may be toast.)
2509 We should really be keeping track of the total size of
2510 stubs added here, as stubs contribute to the final output
2514 prev = PREV_SEC (tail);
2515 /* Set up this stub group. */
2516 htab->stub_group[tail->id].link_sec = curr;
2518 while (tail != curr && (tail = prev) != NULL);
2520 /* But wait, there's more! Input sections up to stub_group_size
2521 bytes before the stub section can be handled by it too. */
2522 if (!stubs_always_before_branch)
2526 && ((total += tail->output_offset - prev->output_offset)
2530 prev = PREV_SEC (tail);
2531 htab->stub_group[tail->id].link_sec = curr;
2537 while (list-- != htab->input_list);
2539 free (htab->input_list);
2544 /* Determine and set the size of the stub section for a final link.
2546 The basic idea here is to examine all the relocations looking for
2547 PC-relative calls to a target that is unreachable with a "bl"
2551 elfNN_aarch64_size_stubs (bfd *output_bfd,
2553 struct bfd_link_info *info,
2554 bfd_signed_vma group_size,
2555 asection * (*add_stub_section) (const char *,
2557 void (*layout_sections_again) (void))
2559 bfd_size_type stub_group_size;
2560 bfd_boolean stubs_always_before_branch;
2561 bfd_boolean stub_changed = 0;
2562 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
2564 /* Propagate mach to stub bfd, because it may not have been
2565 finalized when we created stub_bfd. */
2566 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
2567 bfd_get_mach (output_bfd));
2569 /* Stash our params away. */
2570 htab->stub_bfd = stub_bfd;
2571 htab->add_stub_section = add_stub_section;
2572 htab->layout_sections_again = layout_sections_again;
2573 stubs_always_before_branch = group_size < 0;
2575 stub_group_size = -group_size;
2577 stub_group_size = group_size;
2579 if (stub_group_size == 1)
2581 /* Default values. */
2582 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
2583 stub_group_size = 127 * 1024 * 1024;
2586 group_sections (htab, stub_group_size, stubs_always_before_branch);
2591 unsigned int bfd_indx;
2594 for (input_bfd = info->input_bfds, bfd_indx = 0;
2595 input_bfd != NULL; input_bfd = input_bfd->link_next, bfd_indx++)
2597 Elf_Internal_Shdr *symtab_hdr;
2599 Elf_Internal_Sym *local_syms = NULL;
2601 /* We'll need the symbol table in a second. */
2602 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2603 if (symtab_hdr->sh_info == 0)
2606 /* Walk over each section attached to the input bfd. */
2607 for (section = input_bfd->sections;
2608 section != NULL; section = section->next)
2610 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2612 /* If there aren't any relocs, then there's nothing more
2614 if ((section->flags & SEC_RELOC) == 0
2615 || section->reloc_count == 0
2616 || (section->flags & SEC_CODE) == 0)
2619 /* If this section is a link-once section that will be
2620 discarded, then don't create any stubs. */
2621 if (section->output_section == NULL
2622 || section->output_section->owner != output_bfd)
2625 /* Get the relocs. */
2627 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
2628 NULL, info->keep_memory);
2629 if (internal_relocs == NULL)
2630 goto error_ret_free_local;
2632 /* Now examine each relocation. */
2633 irela = internal_relocs;
2634 irelaend = irela + section->reloc_count;
2635 for (; irela < irelaend; irela++)
2637 unsigned int r_type, r_indx;
2638 enum elf_aarch64_stub_type stub_type;
2639 struct elf_aarch64_stub_hash_entry *stub_entry;
2642 bfd_vma destination;
2643 struct elf_aarch64_link_hash_entry *hash;
2644 const char *sym_name;
2646 const asection *id_sec;
2647 unsigned char st_type;
2650 r_type = ELFNN_R_TYPE (irela->r_info);
2651 r_indx = ELFNN_R_SYM (irela->r_info);
2653 if (r_type >= (unsigned int) R_AARCH64_end)
2655 bfd_set_error (bfd_error_bad_value);
2656 error_ret_free_internal:
2657 if (elf_section_data (section)->relocs == NULL)
2658 free (internal_relocs);
2659 goto error_ret_free_local;
2662 /* Only look for stubs on unconditional branch and
2663 branch and link instructions. */
2664 if (r_type != (unsigned int) AARCH64_R (CALL26)
2665 && r_type != (unsigned int) AARCH64_R (JUMP26))
2668 /* Now determine the call target, its name, value,
2675 if (r_indx < symtab_hdr->sh_info)
2677 /* It's a local symbol. */
2678 Elf_Internal_Sym *sym;
2679 Elf_Internal_Shdr *hdr;
2681 if (local_syms == NULL)
2684 = (Elf_Internal_Sym *) symtab_hdr->contents;
2685 if (local_syms == NULL)
2687 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2688 symtab_hdr->sh_info, 0,
2690 if (local_syms == NULL)
2691 goto error_ret_free_internal;
2694 sym = local_syms + r_indx;
2695 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
2696 sym_sec = hdr->bfd_section;
2698 /* This is an undefined symbol. It can never
2702 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2703 sym_value = sym->st_value;
2704 destination = (sym_value + irela->r_addend
2705 + sym_sec->output_offset
2706 + sym_sec->output_section->vma);
2707 st_type = ELF_ST_TYPE (sym->st_info);
2709 = bfd_elf_string_from_elf_section (input_bfd,
2710 symtab_hdr->sh_link,
2717 e_indx = r_indx - symtab_hdr->sh_info;
2718 hash = ((struct elf_aarch64_link_hash_entry *)
2719 elf_sym_hashes (input_bfd)[e_indx]);
2721 while (hash->root.root.type == bfd_link_hash_indirect
2722 || hash->root.root.type == bfd_link_hash_warning)
2723 hash = ((struct elf_aarch64_link_hash_entry *)
2724 hash->root.root.u.i.link);
2726 if (hash->root.root.type == bfd_link_hash_defined
2727 || hash->root.root.type == bfd_link_hash_defweak)
2729 struct elf_aarch64_link_hash_table *globals =
2730 elf_aarch64_hash_table (info);
2731 sym_sec = hash->root.root.u.def.section;
2732 sym_value = hash->root.root.u.def.value;
2733 /* For a destination in a shared library,
2734 use the PLT stub as target address to
2735 decide whether a branch stub is
2737 if (globals->root.splt != NULL && hash != NULL
2738 && hash->root.plt.offset != (bfd_vma) - 1)
2740 sym_sec = globals->root.splt;
2741 sym_value = hash->root.plt.offset;
2742 if (sym_sec->output_section != NULL)
2743 destination = (sym_value
2744 + sym_sec->output_offset
2746 sym_sec->output_section->vma);
2748 else if (sym_sec->output_section != NULL)
2749 destination = (sym_value + irela->r_addend
2750 + sym_sec->output_offset
2751 + sym_sec->output_section->vma);
2753 else if (hash->root.root.type == bfd_link_hash_undefined
2754 || (hash->root.root.type
2755 == bfd_link_hash_undefweak))
2757 /* For a shared library, use the PLT stub as
2758 target address to decide whether a long
2759 branch stub is needed.
2760 For absolute code, they cannot be handled. */
2761 struct elf_aarch64_link_hash_table *globals =
2762 elf_aarch64_hash_table (info);
2764 if (globals->root.splt != NULL && hash != NULL
2765 && hash->root.plt.offset != (bfd_vma) - 1)
2767 sym_sec = globals->root.splt;
2768 sym_value = hash->root.plt.offset;
2769 if (sym_sec->output_section != NULL)
2770 destination = (sym_value
2771 + sym_sec->output_offset
2773 sym_sec->output_section->vma);
2780 bfd_set_error (bfd_error_bad_value);
2781 goto error_ret_free_internal;
2783 st_type = ELF_ST_TYPE (hash->root.type);
2784 sym_name = hash->root.root.root.string;
2787 /* Determine what (if any) linker stub is needed. */
2788 stub_type = aarch64_type_of_stub
2789 (info, section, irela, st_type, hash, destination);
2790 if (stub_type == aarch64_stub_none)
2793 /* Support for grouping stub sections. */
2794 id_sec = htab->stub_group[section->id].link_sec;
2796 /* Get the name of this stub. */
2797 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
2800 goto error_ret_free_internal;
2803 aarch64_stub_hash_lookup (&htab->stub_hash_table,
2804 stub_name, FALSE, FALSE);
2805 if (stub_entry != NULL)
2807 /* The proper stub has already been created. */
2812 stub_entry = elfNN_aarch64_add_stub (stub_name, section,
2814 if (stub_entry == NULL)
2817 goto error_ret_free_internal;
2820 stub_entry->target_value = sym_value;
2821 stub_entry->target_section = sym_sec;
2822 stub_entry->stub_type = stub_type;
2823 stub_entry->h = hash;
2824 stub_entry->st_type = st_type;
2826 if (sym_name == NULL)
2827 sym_name = "unnamed";
2828 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
2829 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
2830 if (stub_entry->output_name == NULL)
2833 goto error_ret_free_internal;
2836 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
2839 stub_changed = TRUE;
2842 /* We're done with the internal relocs, free them. */
2843 if (elf_section_data (section)->relocs == NULL)
2844 free (internal_relocs);
2851 /* OK, we've added some stubs. Find out the new size of the
2853 for (stub_sec = htab->stub_bfd->sections;
2854 stub_sec != NULL; stub_sec = stub_sec->next)
2857 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
2859 /* Ask the linker to do its stuff. */
2860 (*htab->layout_sections_again) ();
2861 stub_changed = FALSE;
2866 error_ret_free_local:
2870 /* Build all the stubs associated with the current output file. The
2871 stubs are kept in a hash table attached to the main linker hash
2872 table. We also set up the .plt entries for statically linked PIC
2873 functions here. This function is called via aarch64_elf_finish in the
2877 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
2880 struct bfd_hash_table *table;
2881 struct elf_aarch64_link_hash_table *htab;
2883 htab = elf_aarch64_hash_table (info);
2885 for (stub_sec = htab->stub_bfd->sections;
2886 stub_sec != NULL; stub_sec = stub_sec->next)
2890 /* Ignore non-stub sections. */
2891 if (!strstr (stub_sec->name, STUB_SUFFIX))
2894 /* Allocate memory to hold the linker stubs. */
2895 size = stub_sec->size;
2896 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
2897 if (stub_sec->contents == NULL && size != 0)
2902 /* Build the stubs as directed by the stub hash table. */
2903 table = &htab->stub_hash_table;
2904 bfd_hash_traverse (table, aarch64_build_one_stub, info);
2910 /* Add an entry to the code/data map for section SEC. */
2913 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
2915 struct _aarch64_elf_section_data *sec_data =
2916 elf_aarch64_section_data (sec);
2917 unsigned int newidx;
2919 if (sec_data->map == NULL)
2921 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
2922 sec_data->mapcount = 0;
2923 sec_data->mapsize = 1;
2926 newidx = sec_data->mapcount++;
2928 if (sec_data->mapcount > sec_data->mapsize)
2930 sec_data->mapsize *= 2;
2931 sec_data->map = bfd_realloc_or_free
2932 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
2937 sec_data->map[newidx].vma = vma;
2938 sec_data->map[newidx].type = type;
2943 /* Initialise maps of insn/data for input BFDs. */
2945 bfd_elfNN_aarch64_init_maps (bfd *abfd)
2947 Elf_Internal_Sym *isymbuf;
2948 Elf_Internal_Shdr *hdr;
2949 unsigned int i, localsyms;
2951 /* Make sure that we are dealing with an AArch64 elf binary. */
2952 if (!is_aarch64_elf (abfd))
2955 if ((abfd->flags & DYNAMIC) != 0)
2958 hdr = &elf_symtab_hdr (abfd);
2959 localsyms = hdr->sh_info;
2961 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
2962 should contain the number of local symbols, which should come before any
2963 global symbols. Mapping symbols are always local. */
2964 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
2966 /* No internal symbols read? Skip this BFD. */
2967 if (isymbuf == NULL)
2970 for (i = 0; i < localsyms; i++)
2972 Elf_Internal_Sym *isym = &isymbuf[i];
2973 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2976 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
2978 name = bfd_elf_string_from_elf_section (abfd,
2982 if (bfd_is_aarch64_special_symbol_name
2983 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
2984 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
2989 /* Set option values needed during linking. */
2991 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
2992 struct bfd_link_info *link_info,
2994 int no_wchar_warn, int pic_veneer)
2996 struct elf_aarch64_link_hash_table *globals;
2998 globals = elf_aarch64_hash_table (link_info);
2999 globals->pic_veneer = pic_veneer;
3001 BFD_ASSERT (is_aarch64_elf (output_bfd));
3002 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3003 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
3007 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
3008 struct elf_aarch64_link_hash_table
3009 *globals, struct bfd_link_info *info,
3010 bfd_vma value, bfd *output_bfd,
3011 bfd_boolean *unresolved_reloc_p)
3013 bfd_vma off = (bfd_vma) - 1;
3014 asection *basegot = globals->root.sgot;
3015 bfd_boolean dyn = globals->root.dynamic_sections_created;
3019 BFD_ASSERT (basegot != NULL);
3020 off = h->got.offset;
3021 BFD_ASSERT (off != (bfd_vma) - 1);
3022 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3024 && SYMBOL_REFERENCES_LOCAL (info, h))
3025 || (ELF_ST_VISIBILITY (h->other)
3026 && h->root.type == bfd_link_hash_undefweak))
3028 /* This is actually a static link, or it is a -Bsymbolic link
3029 and the symbol is defined locally. We must initialize this
3030 entry in the global offset table. Since the offset must
3031 always be a multiple of 8 (4 in the case of ILP32), we use
3032 the least significant bit to record whether we have
3033 initialized it already.
3034 When doing a dynamic link, we create a .rel(a).got relocation
3035 entry to initialize the value. This is done in the
3036 finish_dynamic_symbol routine. */
3041 bfd_put_NN (output_bfd, value, basegot->contents + off);
3046 *unresolved_reloc_p = FALSE;
3048 off = off + basegot->output_section->vma + basegot->output_offset;
3054 /* Change R_TYPE to a more efficient access model where possible,
3055 return the new reloc type. */
3057 static bfd_reloc_code_real_type
3058 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
3059 struct elf_link_hash_entry *h)
3061 bfd_boolean is_local = h == NULL;
3065 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3066 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3068 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3069 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
3071 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3072 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3074 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3075 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
3077 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3078 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
3080 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
3081 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
3083 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3084 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3085 /* Instructions with these relocations will become NOPs. */
3086 return BFD_RELOC_AARCH64_NONE;
3096 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
3100 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3101 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3102 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3103 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3106 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3107 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3110 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3111 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3112 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3113 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3114 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3115 return GOT_TLSDESC_GD;
3117 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3118 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3119 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3122 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3123 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3124 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3125 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3126 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3127 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3128 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3129 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3139 aarch64_can_relax_tls (bfd *input_bfd,
3140 struct bfd_link_info *info,
3141 bfd_reloc_code_real_type r_type,
3142 struct elf_link_hash_entry *h,
3143 unsigned long r_symndx)
3145 unsigned int symbol_got_type;
3146 unsigned int reloc_got_type;
3148 if (! IS_AARCH64_TLS_RELOC (r_type))
3151 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
3152 reloc_got_type = aarch64_reloc_got_type (r_type);
3154 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
3160 if (h && h->root.type == bfd_link_hash_undefweak)
3166 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
3169 static bfd_reloc_code_real_type
3170 aarch64_tls_transition (bfd *input_bfd,
3171 struct bfd_link_info *info,
3172 unsigned int r_type,
3173 struct elf_link_hash_entry *h,
3174 unsigned long r_symndx)
3176 bfd_reloc_code_real_type bfd_r_type
3177 = elfNN_aarch64_bfd_reloc_from_type (r_type);
3179 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
3182 return aarch64_tls_transition_without_check (bfd_r_type, h);
3185 /* Return the base VMA address which should be subtracted from real addresses
3186 when resolving R_AARCH64_TLS_DTPREL relocation. */
3189 dtpoff_base (struct bfd_link_info *info)
3191 /* If tls_sec is NULL, we should have signalled an error already. */
3192 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
3193 return elf_hash_table (info)->tls_sec->vma;
3196 /* Return the base VMA address which should be subtracted from real addresses
3197 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
3200 tpoff_base (struct bfd_link_info *info)
3202 struct elf_link_hash_table *htab = elf_hash_table (info);
3204 /* If tls_sec is NULL, we should have signalled an error already. */
3205 if (htab->tls_sec == NULL)
3208 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
3209 htab->tls_sec->alignment_power);
3210 return htab->tls_sec->vma - base;
3214 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3215 unsigned long r_symndx)
3217 /* Calculate the address of the GOT entry for symbol
3218 referred to in h. */
3220 return &h->got.offset;
3224 struct elf_aarch64_local_symbol *l;
3226 l = elf_aarch64_locals (input_bfd);
3227 return &l[r_symndx].got_offset;
3232 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3233 unsigned long r_symndx)
3236 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
3241 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
3242 unsigned long r_symndx)
3245 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3250 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3251 unsigned long r_symndx)
3254 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3260 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3261 unsigned long r_symndx)
3263 /* Calculate the address of the GOT entry for symbol
3264 referred to in h. */
3267 struct elf_aarch64_link_hash_entry *eh;
3268 eh = (struct elf_aarch64_link_hash_entry *) h;
3269 return &eh->tlsdesc_got_jump_table_offset;
3274 struct elf_aarch64_local_symbol *l;
3276 l = elf_aarch64_locals (input_bfd);
3277 return &l[r_symndx].tlsdesc_got_jump_table_offset;
3282 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3283 unsigned long r_symndx)
3286 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3291 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
3292 struct elf_link_hash_entry *h,
3293 unsigned long r_symndx)
3296 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3301 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3302 unsigned long r_symndx)
3305 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3310 /* Perform a relocation as part of a final link. */
3311 static bfd_reloc_status_type
3312 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
3315 asection *input_section,
3317 Elf_Internal_Rela *rel,
3319 struct bfd_link_info *info,
3321 struct elf_link_hash_entry *h,
3322 bfd_boolean *unresolved_reloc_p,
3323 bfd_boolean save_addend,
3324 bfd_vma *saved_addend)
3326 unsigned int r_type = howto->type;
3327 bfd_reloc_code_real_type bfd_r_type
3328 = elfNN_aarch64_bfd_reloc_from_howto (howto);
3329 bfd_reloc_code_real_type new_bfd_r_type;
3330 unsigned long r_symndx;
3331 bfd_byte *hit_data = contents + rel->r_offset;
3333 bfd_signed_vma signed_addend;
3334 struct elf_aarch64_link_hash_table *globals;
3335 bfd_boolean weak_undef_p;
3337 globals = elf_aarch64_hash_table (info);
3339 BFD_ASSERT (is_aarch64_elf (input_bfd));
3341 r_symndx = ELFNN_R_SYM (rel->r_info);
3343 /* It is possible to have linker relaxations on some TLS access
3344 models. Update our information here. */
3345 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
3346 if (new_bfd_r_type != bfd_r_type)
3348 bfd_r_type = new_bfd_r_type;
3349 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
3350 BFD_ASSERT (howto != NULL);
3351 r_type = howto->type;
3354 place = input_section->output_section->vma
3355 + input_section->output_offset + rel->r_offset;
3357 /* Get addend, accumulating the addend for consecutive relocs
3358 which refer to the same offset. */
3359 signed_addend = saved_addend ? *saved_addend : 0;
3360 signed_addend += rel->r_addend;
3362 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
3363 : bfd_is_und_section (sym_sec));
3367 case BFD_RELOC_AARCH64_NONE:
3368 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3369 *unresolved_reloc_p = FALSE;
3370 return bfd_reloc_ok;
3372 case BFD_RELOC_AARCH64_NN:
3374 /* When generating a shared object or relocatable executable, these
3375 relocations are copied into the output file to be resolved at
3377 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
3378 && (input_section->flags & SEC_ALLOC)
3380 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3381 || h->root.type != bfd_link_hash_undefweak))
3383 Elf_Internal_Rela outrel;
3385 bfd_boolean skip, relocate;
3388 *unresolved_reloc_p = FALSE;
3390 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd,
3393 return bfd_reloc_notsupported;
3398 outrel.r_addend = signed_addend;
3400 _bfd_elf_section_offset (output_bfd, info, input_section,
3402 if (outrel.r_offset == (bfd_vma) - 1)
3404 else if (outrel.r_offset == (bfd_vma) - 2)
3410 outrel.r_offset += (input_section->output_section->vma
3411 + input_section->output_offset);
3414 memset (&outrel, 0, sizeof outrel);
3417 && (!info->shared || !info->symbolic || !h->def_regular))
3418 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
3423 /* On SVR4-ish systems, the dynamic loader cannot
3424 relocate the text and data segments independently,
3425 so the symbol does not matter. */
3427 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
3428 outrel.r_addend += value;
3431 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (htab);
3432 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
3434 if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
3436 /* Sanity to check that we have previously allocated
3437 sufficient space in the relocation section for the
3438 number of relocations we actually want to emit. */
3442 /* If this reloc is against an external symbol, we do not want to
3443 fiddle with the addend. Otherwise, we need to include the symbol
3444 value so that it becomes an addend for the dynamic reloc. */
3446 return bfd_reloc_ok;
3448 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3449 contents, rel->r_offset, value,
3453 value += signed_addend;
3456 case BFD_RELOC_AARCH64_JUMP26:
3457 case BFD_RELOC_AARCH64_CALL26:
3459 asection *splt = globals->root.splt;
3460 bfd_boolean via_plt_p =
3461 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
3463 /* A call to an undefined weak symbol is converted to a jump to
3464 the next instruction unless a PLT entry will be created.
3465 The jump to the next instruction is optimized as a NOP.
3466 Do the same for local undefined symbols. */
3467 if (weak_undef_p && ! via_plt_p)
3469 bfd_putl32 (INSN_NOP, hit_data);
3470 return bfd_reloc_ok;
3473 /* If the call goes through a PLT entry, make sure to
3474 check distance to the right destination address. */
3477 value = (splt->output_section->vma
3478 + splt->output_offset + h->plt.offset);
3479 *unresolved_reloc_p = FALSE;
3482 /* If the target symbol is global and marked as a function the
3483 relocation applies a function call or a tail call. In this
3484 situation we can veneer out of range branches. The veneers
3485 use IP0 and IP1 hence cannot be used arbitrary out of range
3486 branches that occur within the body of a function. */
3487 if (h && h->type == STT_FUNC)
3489 /* Check if a stub has to be inserted because the destination
3491 if (! aarch64_valid_branch_p (value, place))
3493 /* The target is out of reach, so redirect the branch to
3494 the local stub for this function. */
3495 struct elf_aarch64_stub_hash_entry *stub_entry;
3496 stub_entry = elfNN_aarch64_get_stub_entry (input_section,
3499 if (stub_entry != NULL)
3500 value = (stub_entry->stub_offset
3501 + stub_entry->stub_sec->output_offset
3502 + stub_entry->stub_sec->output_section->vma);
3506 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3507 signed_addend, weak_undef_p);
3510 case BFD_RELOC_AARCH64_16:
3512 case BFD_RELOC_AARCH64_32:
3514 case BFD_RELOC_AARCH64_ADD_LO12:
3515 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
3516 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
3517 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
3518 case BFD_RELOC_AARCH64_BRANCH19:
3519 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
3520 case BFD_RELOC_AARCH64_LDST8_LO12:
3521 case BFD_RELOC_AARCH64_LDST16_LO12:
3522 case BFD_RELOC_AARCH64_LDST32_LO12:
3523 case BFD_RELOC_AARCH64_LDST64_LO12:
3524 case BFD_RELOC_AARCH64_LDST128_LO12:
3525 case BFD_RELOC_AARCH64_MOVW_G0_S:
3526 case BFD_RELOC_AARCH64_MOVW_G1_S:
3527 case BFD_RELOC_AARCH64_MOVW_G2_S:
3528 case BFD_RELOC_AARCH64_MOVW_G0:
3529 case BFD_RELOC_AARCH64_MOVW_G0_NC:
3530 case BFD_RELOC_AARCH64_MOVW_G1:
3531 case BFD_RELOC_AARCH64_MOVW_G1_NC:
3532 case BFD_RELOC_AARCH64_MOVW_G2:
3533 case BFD_RELOC_AARCH64_MOVW_G2_NC:
3534 case BFD_RELOC_AARCH64_MOVW_G3:
3535 case BFD_RELOC_AARCH64_16_PCREL:
3536 case BFD_RELOC_AARCH64_32_PCREL:
3537 case BFD_RELOC_AARCH64_64_PCREL:
3538 case BFD_RELOC_AARCH64_TSTBR14:
3539 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3540 signed_addend, weak_undef_p);
3543 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3544 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3545 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3546 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3547 if (globals->root.sgot == NULL)
3548 BFD_ASSERT (h != NULL);
3552 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
3554 unresolved_reloc_p);
3555 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3560 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3561 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3562 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3563 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3564 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3565 if (globals->root.sgot == NULL)
3566 return bfd_reloc_notsupported;
3568 value = (symbol_got_offset (input_bfd, h, r_symndx)
3569 + globals->root.sgot->output_section->vma
3570 + globals->root.sgot->output_section->output_offset);
3572 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3574 *unresolved_reloc_p = FALSE;
3577 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3578 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3579 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3580 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3581 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3582 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3583 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3584 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3585 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3586 signed_addend - tpoff_base (info),
3588 *unresolved_reloc_p = FALSE;
3591 case BFD_RELOC_AARCH64_TLSDESC_ADD:
3592 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3593 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3594 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3595 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3596 case BFD_RELOC_AARCH64_TLSDESC_LDR:
3597 if (globals->root.sgot == NULL)
3598 return bfd_reloc_notsupported;
3600 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
3601 + globals->root.sgotplt->output_section->vma
3602 + globals->root.sgotplt->output_section->output_offset
3603 + globals->sgotplt_jump_table_size);
3605 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3607 *unresolved_reloc_p = FALSE;
3611 return bfd_reloc_notsupported;
3615 *saved_addend = value;
3617 /* Only apply the final relocation in a sequence. */
3619 return bfd_reloc_continue;
3621 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
3625 /* Handle TLS relaxations. Relaxing is possible for symbols that use
3626 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
3629 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
3630 is to then call final_link_relocate. Return other values in the
3633 static bfd_reloc_status_type
3634 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
3635 bfd *input_bfd, bfd_byte *contents,
3636 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
3638 bfd_boolean is_local = h == NULL;
3639 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
3642 BFD_ASSERT (globals && input_bfd && contents && rel);
3644 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
3646 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3647 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3650 /* GD->LE relaxation:
3651 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
3653 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
3655 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
3656 return bfd_reloc_continue;
3660 /* GD->IE relaxation:
3661 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
3663 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
3665 insn = bfd_getl32 (contents + rel->r_offset);
3666 return bfd_reloc_continue;
3669 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3672 /* GD->LE relaxation:
3673 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
3675 bfd_putl32 (0xf2800000, contents + rel->r_offset);
3676 return bfd_reloc_continue;
3680 /* GD->IE relaxation:
3681 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
3683 insn = bfd_getl32 (contents + rel->r_offset);
3685 bfd_putl32 (insn, contents + rel->r_offset);
3686 return bfd_reloc_continue;
3689 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3692 /* GD->LE relaxation
3693 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
3694 bl __tls_get_addr => mrs x1, tpidr_el0
3695 nop => add x0, x1, x0
3698 /* First kill the tls_get_addr reloc on the bl instruction. */
3699 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
3700 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
3702 bfd_putl32 (0xf2800000, contents + rel->r_offset);
3703 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
3704 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
3705 return bfd_reloc_continue;
3709 /* GD->IE relaxation
3710 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
3711 BL __tls_get_addr => mrs x1, tpidr_el0
3713 NOP => add x0, x1, x0
3716 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
3718 /* Remove the relocation on the BL instruction. */
3719 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
3721 bfd_putl32 (0xf9400000, contents + rel->r_offset);
3723 /* We choose to fixup the BL and NOP instructions using the
3724 offset from the second relocation to allow flexibility in
3725 scheduling instructions between the ADD and BL. */
3726 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
3727 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
3728 return bfd_reloc_continue;
3731 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3732 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3733 /* GD->IE/LE relaxation:
3734 add x0, x0, #:tlsdesc_lo12:var => nop
3737 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
3738 return bfd_reloc_ok;
3740 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3741 /* IE->LE relaxation:
3742 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
3746 insn = bfd_getl32 (contents + rel->r_offset);
3747 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
3749 return bfd_reloc_continue;
3751 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
3752 /* IE->LE relaxation:
3753 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
3757 insn = bfd_getl32 (contents + rel->r_offset);
3758 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
3760 return bfd_reloc_continue;
3763 return bfd_reloc_continue;
3766 return bfd_reloc_ok;
3769 /* Relocate an AArch64 ELF section. */
3772 elfNN_aarch64_relocate_section (bfd *output_bfd,
3773 struct bfd_link_info *info,
3775 asection *input_section,
3777 Elf_Internal_Rela *relocs,
3778 Elf_Internal_Sym *local_syms,
3779 asection **local_sections)
3781 Elf_Internal_Shdr *symtab_hdr;
3782 struct elf_link_hash_entry **sym_hashes;
3783 Elf_Internal_Rela *rel;
3784 Elf_Internal_Rela *relend;
3786 struct elf_aarch64_link_hash_table *globals;
3787 bfd_boolean save_addend = FALSE;
3790 globals = elf_aarch64_hash_table (info);
3792 symtab_hdr = &elf_symtab_hdr (input_bfd);
3793 sym_hashes = elf_sym_hashes (input_bfd);
3796 relend = relocs + input_section->reloc_count;
3797 for (; rel < relend; rel++)
3799 unsigned int r_type;
3800 bfd_reloc_code_real_type bfd_r_type;
3801 bfd_reloc_code_real_type relaxed_bfd_r_type;
3802 reloc_howto_type *howto;
3803 unsigned long r_symndx;
3804 Elf_Internal_Sym *sym;
3806 struct elf_link_hash_entry *h;
3808 bfd_reloc_status_type r;
3811 bfd_boolean unresolved_reloc = FALSE;
3812 char *error_message = NULL;
3814 r_symndx = ELFNN_R_SYM (rel->r_info);
3815 r_type = ELFNN_R_TYPE (rel->r_info);
3817 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
3818 howto = bfd_reloc.howto;
3822 (*_bfd_error_handler)
3823 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3824 input_bfd, input_section, r_type);
3827 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
3833 if (r_symndx < symtab_hdr->sh_info)
3835 sym = local_syms + r_symndx;
3836 sym_type = ELFNN_ST_TYPE (sym->st_info);
3837 sec = local_sections[r_symndx];
3839 /* An object file might have a reference to a local
3840 undefined symbol. This is a daft object file, but we
3841 should at least do something about it. */
3842 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
3843 && bfd_is_und_section (sec)
3844 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
3846 if (!info->callbacks->undefined_symbol
3847 (info, bfd_elf_string_from_elf_section
3848 (input_bfd, symtab_hdr->sh_link, sym->st_name),
3849 input_bfd, input_section, rel->r_offset, TRUE))
3853 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3859 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3860 r_symndx, symtab_hdr, sym_hashes,
3862 unresolved_reloc, warned);
3867 if (sec != NULL && discarded_section (sec))
3868 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3869 rel, 1, relend, howto, 0, contents);
3871 if (info->relocatable)
3873 /* This is a relocatable link. We don't have to change
3874 anything, unless the reloc is against a section symbol,
3875 in which case we have to adjust according to where the
3876 section symbol winds up in the output section. */
3877 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3878 rel->r_addend += sec->output_offset;
3883 name = h->root.root.string;
3886 name = (bfd_elf_string_from_elf_section
3887 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3888 if (name == NULL || *name == '\0')
3889 name = bfd_section_name (input_bfd, sec);
3893 && r_type != R_AARCH64_NONE
3894 && r_type != R_AARCH64_NULL
3896 || h->root.type == bfd_link_hash_defined
3897 || h->root.type == bfd_link_hash_defweak)
3898 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
3900 (*_bfd_error_handler)
3901 ((sym_type == STT_TLS
3902 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
3903 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
3905 input_section, (long) rel->r_offset, howto->name, name);
3908 /* We relax only if we can see that there can be a valid transition
3909 from a reloc type to another.
3910 We call elfNN_aarch64_final_link_relocate unless we're completely
3911 done, i.e., the relaxation produced the final output we want. */
3913 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
3915 if (relaxed_bfd_r_type != bfd_r_type)
3917 bfd_r_type = relaxed_bfd_r_type;
3918 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
3919 BFD_ASSERT (howto != NULL);
3920 r_type = howto->type;
3921 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
3922 unresolved_reloc = 0;
3925 r = bfd_reloc_continue;
3927 /* There may be multiple consecutive relocations for the
3928 same offset. In that case we are supposed to treat the
3929 output of each relocation as the addend for the next. */
3930 if (rel + 1 < relend
3931 && rel->r_offset == rel[1].r_offset
3932 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
3933 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
3936 save_addend = FALSE;
3938 if (r == bfd_reloc_continue)
3939 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
3940 input_section, contents, rel,
3941 relocation, info, sec,
3942 h, &unresolved_reloc,
3943 save_addend, &addend);
3945 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
3947 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3948 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3949 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
3951 bfd_boolean need_relocs = FALSE;
3956 off = symbol_got_offset (input_bfd, h, r_symndx);
3957 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3960 (info->shared || indx != 0) &&
3962 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3963 || h->root.type != bfd_link_hash_undefweak);
3965 BFD_ASSERT (globals->root.srelgot != NULL);
3969 Elf_Internal_Rela rela;
3970 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
3972 rela.r_offset = globals->root.sgot->output_section->vma +
3973 globals->root.sgot->output_offset + off;
3976 loc = globals->root.srelgot->contents;
3977 loc += globals->root.srelgot->reloc_count++
3978 * RELOC_SIZE (htab);
3979 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
3983 bfd_put_NN (output_bfd,
3984 relocation - dtpoff_base (info),
3985 globals->root.sgot->contents + off
3990 /* This TLS symbol is global. We emit a
3991 relocation to fixup the tls offset at load
3994 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
3997 (globals->root.sgot->output_section->vma
3998 + globals->root.sgot->output_offset + off
4001 loc = globals->root.srelgot->contents;
4002 loc += globals->root.srelgot->reloc_count++
4003 * RELOC_SIZE (globals);
4004 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4005 bfd_put_NN (output_bfd, (bfd_vma) 0,
4006 globals->root.sgot->contents + off
4012 bfd_put_NN (output_bfd, (bfd_vma) 1,
4013 globals->root.sgot->contents + off);
4014 bfd_put_NN (output_bfd,
4015 relocation - dtpoff_base (info),
4016 globals->root.sgot->contents + off
4020 symbol_got_offset_mark (input_bfd, h, r_symndx);
4024 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4025 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4026 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4028 bfd_boolean need_relocs = FALSE;
4033 off = symbol_got_offset (input_bfd, h, r_symndx);
4035 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4038 (info->shared || indx != 0) &&
4040 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4041 || h->root.type != bfd_link_hash_undefweak);
4043 BFD_ASSERT (globals->root.srelgot != NULL);
4047 Elf_Internal_Rela rela;
4050 rela.r_addend = relocation - dtpoff_base (info);
4054 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
4055 rela.r_offset = globals->root.sgot->output_section->vma +
4056 globals->root.sgot->output_offset + off;
4058 loc = globals->root.srelgot->contents;
4059 loc += globals->root.srelgot->reloc_count++
4060 * RELOC_SIZE (htab);
4062 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4064 bfd_put_NN (output_bfd, rela.r_addend,
4065 globals->root.sgot->contents + off);
4068 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
4069 globals->root.sgot->contents + off);
4071 symbol_got_offset_mark (input_bfd, h, r_symndx);
4075 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4076 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4077 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4078 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4079 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4080 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4081 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4082 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4085 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4086 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4087 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4088 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
4090 bfd_boolean need_relocs = FALSE;
4091 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
4092 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
4094 need_relocs = (h == NULL
4095 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4096 || h->root.type != bfd_link_hash_undefweak);
4098 BFD_ASSERT (globals->root.srelgot != NULL);
4099 BFD_ASSERT (globals->root.sgot != NULL);
4104 Elf_Internal_Rela rela;
4105 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
4108 rela.r_offset = (globals->root.sgotplt->output_section->vma
4109 + globals->root.sgotplt->output_offset
4110 + off + globals->sgotplt_jump_table_size);
4113 rela.r_addend = relocation - dtpoff_base (info);
4115 /* Allocate the next available slot in the PLT reloc
4116 section to hold our R_AARCH64_TLSDESC, the next
4117 available slot is determined from reloc_count,
4118 which we step. But note, reloc_count was
4119 artifically moved down while allocating slots for
4120 real PLT relocs such that all of the PLT relocs
4121 will fit above the initial reloc_count and the
4122 extra stuff will fit below. */
4123 loc = globals->root.srelplt->contents;
4124 loc += globals->root.srelplt->reloc_count++
4125 * RELOC_SIZE (globals);
4127 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4129 bfd_put_NN (output_bfd, (bfd_vma) 0,
4130 globals->root.sgotplt->contents + off +
4131 globals->sgotplt_jump_table_size);
4132 bfd_put_NN (output_bfd, (bfd_vma) 0,
4133 globals->root.sgotplt->contents + off +
4134 globals->sgotplt_jump_table_size +
4138 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
4149 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4150 because such sections are not SEC_ALLOC and thus ld.so will
4151 not process them. */
4152 if (unresolved_reloc
4153 && !((input_section->flags & SEC_DEBUGGING) != 0
4155 && _bfd_elf_section_offset (output_bfd, info, input_section,
4156 +rel->r_offset) != (bfd_vma) - 1)
4158 (*_bfd_error_handler)
4160 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4161 input_bfd, input_section, (long) rel->r_offset, howto->name,
4162 h->root.root.string);
4166 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
4170 case bfd_reloc_overflow:
4171 /* If the overflowing reloc was to an undefined symbol,
4172 we have already printed one error message and there
4173 is no point complaining again. */
4175 h->root.type != bfd_link_hash_undefined)
4176 && (!((*info->callbacks->reloc_overflow)
4177 (info, (h ? &h->root : NULL), name, howto->name,
4178 (bfd_vma) 0, input_bfd, input_section,
4183 case bfd_reloc_undefined:
4184 if (!((*info->callbacks->undefined_symbol)
4185 (info, name, input_bfd, input_section,
4186 rel->r_offset, TRUE)))
4190 case bfd_reloc_outofrange:
4191 error_message = _("out of range");
4194 case bfd_reloc_notsupported:
4195 error_message = _("unsupported relocation");
4198 case bfd_reloc_dangerous:
4199 /* error_message should already be set. */
4203 error_message = _("unknown error");
4207 BFD_ASSERT (error_message != NULL);
4208 if (!((*info->callbacks->reloc_dangerous)
4209 (info, error_message, input_bfd, input_section,
4220 /* Set the right machine number. */
4223 elfNN_aarch64_object_p (bfd *abfd)
4226 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
4228 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
4233 /* Function to keep AArch64 specific flags in the ELF header. */
4236 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
4238 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
4243 elf_elfheader (abfd)->e_flags = flags;
4244 elf_flags_init (abfd) = TRUE;
4250 /* Copy backend specific data from one object module to another. */
4253 elfNN_aarch64_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4257 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
4260 in_flags = elf_elfheader (ibfd)->e_flags;
4262 elf_elfheader (obfd)->e_flags = in_flags;
4263 elf_flags_init (obfd) = TRUE;
4265 /* Also copy the EI_OSABI field. */
4266 elf_elfheader (obfd)->e_ident[EI_OSABI] =
4267 elf_elfheader (ibfd)->e_ident[EI_OSABI];
4269 /* Copy object attributes. */
4270 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4275 /* Merge backend specific data from an object file to the output
4276 object file when linking. */
4279 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4283 bfd_boolean flags_compatible = TRUE;
4286 /* Check if we have the same endianess. */
4287 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
4290 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
4293 /* The input BFD must have had its flags initialised. */
4294 /* The following seems bogus to me -- The flags are initialized in
4295 the assembler but I don't think an elf_flags_init field is
4296 written into the object. */
4297 /* BFD_ASSERT (elf_flags_init (ibfd)); */
4299 in_flags = elf_elfheader (ibfd)->e_flags;
4300 out_flags = elf_elfheader (obfd)->e_flags;
4302 if (!elf_flags_init (obfd))
4304 /* If the input is the default architecture and had the default
4305 flags then do not bother setting the flags for the output
4306 architecture, instead allow future merges to do this. If no
4307 future merges ever set these flags then they will retain their
4308 uninitialised values, which surprise surprise, correspond
4309 to the default values. */
4310 if (bfd_get_arch_info (ibfd)->the_default
4311 && elf_elfheader (ibfd)->e_flags == 0)
4314 elf_flags_init (obfd) = TRUE;
4315 elf_elfheader (obfd)->e_flags = in_flags;
4317 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4318 && bfd_get_arch_info (obfd)->the_default)
4319 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4320 bfd_get_mach (ibfd));
4325 /* Identical flags must be compatible. */
4326 if (in_flags == out_flags)
4329 /* Check to see if the input BFD actually contains any sections. If
4330 not, its flags may not have been initialised either, but it
4331 cannot actually cause any incompatiblity. Do not short-circuit
4332 dynamic objects; their section list may be emptied by
4333 elf_link_add_object_symbols.
4335 Also check to see if there are no code sections in the input.
4336 In this case there is no need to check for code specific flags.
4337 XXX - do we need to worry about floating-point format compatability
4338 in data sections ? */
4339 if (!(ibfd->flags & DYNAMIC))
4341 bfd_boolean null_input_bfd = TRUE;
4342 bfd_boolean only_data_sections = TRUE;
4344 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4346 if ((bfd_get_section_flags (ibfd, sec)
4347 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4348 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4349 only_data_sections = FALSE;
4351 null_input_bfd = FALSE;
4355 if (null_input_bfd || only_data_sections)
4359 return flags_compatible;
4362 /* Display the flags field. */
4365 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
4367 FILE *file = (FILE *) ptr;
4368 unsigned long flags;
4370 BFD_ASSERT (abfd != NULL && ptr != NULL);
4372 /* Print normal ELF private data. */
4373 _bfd_elf_print_private_bfd_data (abfd, ptr);
4375 flags = elf_elfheader (abfd)->e_flags;
4376 /* Ignore init flag - it may not be set, despite the flags field
4377 containing valid data. */
4379 /* xgettext:c-format */
4380 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4383 fprintf (file, _("<Unrecognised flag bits set>"));
4390 /* Update the got entry reference counts for the section being removed. */
4393 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
4394 struct bfd_link_info *info,
4396 const Elf_Internal_Rela * relocs)
4398 struct elf_aarch64_link_hash_table *htab;
4399 Elf_Internal_Shdr *symtab_hdr;
4400 struct elf_link_hash_entry **sym_hashes;
4401 struct elf_aarch64_local_symbol *locals;
4402 const Elf_Internal_Rela *rel, *relend;
4404 if (info->relocatable)
4407 htab = elf_aarch64_hash_table (info);
4412 elf_section_data (sec)->local_dynrel = NULL;
4414 symtab_hdr = &elf_symtab_hdr (abfd);
4415 sym_hashes = elf_sym_hashes (abfd);
4417 locals = elf_aarch64_locals (abfd);
4419 relend = relocs + sec->reloc_count;
4420 for (rel = relocs; rel < relend; rel++)
4422 unsigned long r_symndx;
4423 unsigned int r_type;
4424 struct elf_link_hash_entry *h = NULL;
4426 r_symndx = ELFNN_R_SYM (rel->r_info);
4428 if (r_symndx >= symtab_hdr->sh_info)
4430 struct elf_aarch64_link_hash_entry *eh;
4431 struct elf_dyn_relocs **pp;
4432 struct elf_dyn_relocs *p;
4434 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4435 while (h->root.type == bfd_link_hash_indirect
4436 || h->root.type == bfd_link_hash_warning)
4437 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4438 eh = (struct elf_aarch64_link_hash_entry *) h;
4440 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4444 /* Everything must go for SEC. */
4452 Elf_Internal_Sym *isym;
4454 /* A local symbol. */
4455 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4461 r_type = ELFNN_R_TYPE (rel->r_info);
4462 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
4464 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4465 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4466 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4467 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4468 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4469 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4470 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4471 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4472 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4473 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4474 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4475 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4476 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4477 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4478 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4479 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4480 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4481 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4482 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4483 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4484 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4487 if (h->got.refcount > 0)
4488 h->got.refcount -= 1;
4490 else if (locals != NULL)
4492 if (locals[r_symndx].got_refcount > 0)
4493 locals[r_symndx].got_refcount -= 1;
4497 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4498 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4499 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4500 if (h != NULL && info->executable)
4502 if (h->plt.refcount > 0)
4503 h->plt.refcount -= 1;
4507 case BFD_RELOC_AARCH64_CALL26:
4508 case BFD_RELOC_AARCH64_JUMP26:
4509 /* If this is a local symbol then we resolve it
4510 directly without creating a PLT entry. */
4514 if (h->plt.refcount > 0)
4515 h->plt.refcount -= 1;
4518 case BFD_RELOC_AARCH64_NN:
4519 if (h != NULL && info->executable)
4521 if (h->plt.refcount > 0)
4522 h->plt.refcount -= 1;
4534 /* Adjust a symbol defined by a dynamic object and referenced by a
4535 regular object. The current definition is in some section of the
4536 dynamic object, but we're not including those sections. We have to
4537 change the definition to something the rest of the link can
4541 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
4542 struct elf_link_hash_entry *h)
4544 struct elf_aarch64_link_hash_table *htab;
4547 /* If this is a function, put it in the procedure linkage table. We
4548 will fill in the contents of the procedure linkage table later,
4549 when we know the address of the .got section. */
4550 if (h->type == STT_FUNC || h->needs_plt)
4552 if (h->plt.refcount <= 0
4553 || SYMBOL_CALLS_LOCAL (info, h)
4554 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4555 && h->root.type == bfd_link_hash_undefweak))
4557 /* This case can occur if we saw a CALL26 reloc in
4558 an input file, but the symbol wasn't referred to
4559 by a dynamic object or all references were
4560 garbage collected. In which case we can end up
4562 h->plt.offset = (bfd_vma) - 1;
4569 /* It's possible that we incorrectly decided a .plt reloc was
4570 needed for an R_X86_64_PC32 reloc to a non-function sym in
4571 check_relocs. We can't decide accurately between function and
4572 non-function syms in check-relocs; Objects loaded later in
4573 the link may change h->type. So fix it now. */
4574 h->plt.offset = (bfd_vma) - 1;
4577 /* If this is a weak symbol, and there is a real definition, the
4578 processor independent code will have arranged for us to see the
4579 real definition first, and we can just use the same value. */
4580 if (h->u.weakdef != NULL)
4582 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4583 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4584 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4585 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4586 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
4587 h->non_got_ref = h->u.weakdef->non_got_ref;
4591 /* If we are creating a shared library, we must presume that the
4592 only references to the symbol are via the global offset table.
4593 For such cases we need not do anything here; the relocations will
4594 be handled correctly by relocate_section. */
4598 /* If there are no references to this symbol that do not use the
4599 GOT, we don't need to generate a copy reloc. */
4600 if (!h->non_got_ref)
4603 /* If -z nocopyreloc was given, we won't generate them either. */
4604 if (info->nocopyreloc)
4610 /* We must allocate the symbol in our .dynbss section, which will
4611 become part of the .bss section of the executable. There will be
4612 an entry for this symbol in the .dynsym section. The dynamic
4613 object will contain position independent code, so all references
4614 from the dynamic object to this symbol will go through the global
4615 offset table. The dynamic linker will use the .dynsym entry to
4616 determine the address it must put in the global offset table, so
4617 both the dynamic object and the regular object will refer to the
4618 same memory location for the variable. */
4620 htab = elf_aarch64_hash_table (info);
4622 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
4623 to copy the initial value out of the dynamic object and into the
4624 runtime process image. */
4625 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
4627 htab->srelbss->size += RELOC_SIZE (htab);
4633 return _bfd_elf_adjust_dynamic_copy (h, s);
4638 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
4640 struct elf_aarch64_local_symbol *locals;
4641 locals = elf_aarch64_locals (abfd);
4644 locals = (struct elf_aarch64_local_symbol *)
4645 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
4648 elf_aarch64_locals (abfd) = locals;
4653 /* Create the .got section to hold the global offset table. */
4656 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
4658 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4661 struct elf_link_hash_entry *h;
4662 struct elf_link_hash_table *htab = elf_hash_table (info);
4664 /* This function may be called more than once. */
4665 s = bfd_get_linker_section (abfd, ".got");
4669 flags = bed->dynamic_sec_flags;
4671 s = bfd_make_section_anyway_with_flags (abfd,
4672 (bed->rela_plts_and_copies_p
4673 ? ".rela.got" : ".rel.got"),
4674 (bed->dynamic_sec_flags
4677 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
4681 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4683 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
4686 htab->sgot->size += GOT_ENTRY_SIZE;
4688 if (bed->want_got_sym)
4690 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4691 (or .got.plt) section. We don't do this in the linker script
4692 because we don't want to define the symbol if we are not creating
4693 a global offset table. */
4694 h = _bfd_elf_define_linkage_sym (abfd, info, s,
4695 "_GLOBAL_OFFSET_TABLE_");
4696 elf_hash_table (info)->hgot = h;
4701 if (bed->want_got_plt)
4703 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
4705 || !bfd_set_section_alignment (abfd, s,
4706 bed->s->log_file_align))
4711 /* The first bit of the global offset table is the header. */
4712 s->size += bed->got_header_size;
4717 /* Look through the relocs for a section during the first phase. */
4720 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
4721 asection *sec, const Elf_Internal_Rela *relocs)
4723 Elf_Internal_Shdr *symtab_hdr;
4724 struct elf_link_hash_entry **sym_hashes;
4725 const Elf_Internal_Rela *rel;
4726 const Elf_Internal_Rela *rel_end;
4729 struct elf_aarch64_link_hash_table *htab;
4731 if (info->relocatable)
4734 BFD_ASSERT (is_aarch64_elf (abfd));
4736 htab = elf_aarch64_hash_table (info);
4739 symtab_hdr = &elf_symtab_hdr (abfd);
4740 sym_hashes = elf_sym_hashes (abfd);
4742 rel_end = relocs + sec->reloc_count;
4743 for (rel = relocs; rel < rel_end; rel++)
4745 struct elf_link_hash_entry *h;
4746 unsigned long r_symndx;
4747 unsigned int r_type;
4748 bfd_reloc_code_real_type bfd_r_type;
4750 r_symndx = ELFNN_R_SYM (rel->r_info);
4751 r_type = ELFNN_R_TYPE (rel->r_info);
4753 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
4755 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
4760 if (r_symndx < symtab_hdr->sh_info)
4764 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4765 while (h->root.type == bfd_link_hash_indirect
4766 || h->root.type == bfd_link_hash_warning)
4767 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4769 /* PR15323, ref flags aren't set for references in the same
4771 h->root.non_ir_ref = 1;
4774 /* Could be done earlier, if h were already available. */
4775 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
4779 case BFD_RELOC_AARCH64_NN:
4781 /* We don't need to handle relocs into sections not going into
4782 the "real" output. */
4783 if ((sec->flags & SEC_ALLOC) == 0)
4791 h->plt.refcount += 1;
4792 h->pointer_equality_needed = 1;
4795 /* No need to do anything if we're not creating a shared
4801 struct elf_dyn_relocs *p;
4802 struct elf_dyn_relocs **head;
4804 /* We must copy these reloc types into the output file.
4805 Create a reloc section in dynobj and make room for
4809 if (htab->root.dynobj == NULL)
4810 htab->root.dynobj = abfd;
4812 sreloc = _bfd_elf_make_dynamic_reloc_section
4813 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
4819 /* If this is a global symbol, we count the number of
4820 relocations we need for this symbol. */
4823 struct elf_aarch64_link_hash_entry *eh;
4824 eh = (struct elf_aarch64_link_hash_entry *) h;
4825 head = &eh->dyn_relocs;
4829 /* Track dynamic relocs needed for local syms too.
4830 We really need local syms available to do this
4835 Elf_Internal_Sym *isym;
4837 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4842 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4846 /* Beware of type punned pointers vs strict aliasing
4848 vpp = &(elf_section_data (s)->local_dynrel);
4849 head = (struct elf_dyn_relocs **) vpp;
4853 if (p == NULL || p->sec != sec)
4855 bfd_size_type amt = sizeof *p;
4856 p = ((struct elf_dyn_relocs *)
4857 bfd_zalloc (htab->root.dynobj, amt));
4870 /* RR: We probably want to keep a consistency check that
4871 there are no dangling GOT_PAGE relocs. */
4872 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4873 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4874 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4875 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4876 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4877 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4878 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4879 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4880 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4881 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4882 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4883 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4884 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4885 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4886 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4887 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4888 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4889 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4890 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4891 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4892 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4895 unsigned old_got_type;
4897 got_type = aarch64_reloc_got_type (bfd_r_type);
4901 h->got.refcount += 1;
4902 old_got_type = elf_aarch64_hash_entry (h)->got_type;
4906 struct elf_aarch64_local_symbol *locals;
4908 if (!elfNN_aarch64_allocate_local_symbols
4909 (abfd, symtab_hdr->sh_info))
4912 locals = elf_aarch64_locals (abfd);
4913 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
4914 locals[r_symndx].got_refcount += 1;
4915 old_got_type = locals[r_symndx].got_type;
4918 /* If a variable is accessed with both general dynamic TLS
4919 methods, two slots may be created. */
4920 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
4921 got_type |= old_got_type;
4923 /* We will already have issued an error message if there
4924 is a TLS/non-TLS mismatch, based on the symbol type.
4925 So just combine any TLS types needed. */
4926 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
4927 && got_type != GOT_NORMAL)
4928 got_type |= old_got_type;
4930 /* If the symbol is accessed by both IE and GD methods, we
4931 are able to relax. Turn off the GD flag, without
4932 messing up with any other kind of TLS types that may be
4934 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
4935 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
4937 if (old_got_type != got_type)
4940 elf_aarch64_hash_entry (h)->got_type = got_type;
4943 struct elf_aarch64_local_symbol *locals;
4944 locals = elf_aarch64_locals (abfd);
4945 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
4946 locals[r_symndx].got_type = got_type;
4950 if (htab->root.dynobj == NULL)
4951 htab->root.dynobj = abfd;
4952 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
4957 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4958 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4959 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4960 if (h != NULL && info->executable)
4962 /* If this reloc is in a read-only section, we might
4963 need a copy reloc. We can't check reliably at this
4964 stage whether the section is read-only, as input
4965 sections have not yet been mapped to output sections.
4966 Tentatively set the flag for now, and correct in
4967 adjust_dynamic_symbol. */
4969 h->plt.refcount += 1;
4970 h->pointer_equality_needed = 1;
4972 /* FIXME:: RR need to handle these in shared libraries
4973 and essentially bomb out as these being non-PIC
4974 relocations in shared libraries. */
4977 case BFD_RELOC_AARCH64_CALL26:
4978 case BFD_RELOC_AARCH64_JUMP26:
4979 /* If this is a local symbol then we resolve it
4980 directly without creating a PLT entry. */
4985 h->plt.refcount += 1;
4996 /* Treat mapping symbols as special target symbols. */
4999 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
5002 return bfd_is_aarch64_special_symbol_name (sym->name,
5003 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
5006 /* This is a copy of elf_find_function () from elf.c except that
5007 AArch64 mapping symbols are ignored when looking for function names. */
5010 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
5014 const char **filename_ptr,
5015 const char **functionname_ptr)
5017 const char *filename = NULL;
5018 asymbol *func = NULL;
5019 bfd_vma low_func = 0;
5022 for (p = symbols; *p != NULL; p++)
5026 q = (elf_symbol_type *) * p;
5028 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5033 filename = bfd_asymbol_name (&q->symbol);
5037 /* Skip mapping symbols. */
5038 if ((q->symbol.flags & BSF_LOCAL)
5039 && (bfd_is_aarch64_special_symbol_name
5040 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
5043 if (bfd_get_section (&q->symbol) == section
5044 && q->symbol.value >= low_func && q->symbol.value <= offset)
5046 func = (asymbol *) q;
5047 low_func = q->symbol.value;
5057 *filename_ptr = filename;
5058 if (functionname_ptr)
5059 *functionname_ptr = bfd_asymbol_name (func);
5065 /* Find the nearest line to a particular section and offset, for error
5066 reporting. This code is a duplicate of the code in elf.c, except
5067 that it uses aarch64_elf_find_function. */
5070 elfNN_aarch64_find_nearest_line (bfd *abfd,
5074 const char **filename_ptr,
5075 const char **functionname_ptr,
5076 unsigned int *line_ptr)
5078 bfd_boolean found = FALSE;
5080 /* We skip _bfd_dwarf1_find_nearest_line since no known AArch64
5081 toolchain uses it. */
5083 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
5084 section, symbols, offset,
5085 filename_ptr, functionname_ptr,
5087 &elf_tdata (abfd)->dwarf2_find_line_info))
5089 if (!*functionname_ptr)
5090 aarch64_elf_find_function (abfd, section, symbols, offset,
5091 *filename_ptr ? NULL : filename_ptr,
5097 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
5098 &found, filename_ptr,
5099 functionname_ptr, line_ptr,
5100 &elf_tdata (abfd)->line_info))
5103 if (found && (*functionname_ptr || *line_ptr))
5106 if (symbols == NULL)
5109 if (!aarch64_elf_find_function (abfd, section, symbols, offset,
5110 filename_ptr, functionname_ptr))
5118 elfNN_aarch64_find_inliner_info (bfd *abfd,
5119 const char **filename_ptr,
5120 const char **functionname_ptr,
5121 unsigned int *line_ptr)
5124 found = _bfd_dwarf2_find_inliner_info
5125 (abfd, filename_ptr,
5126 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
5132 elfNN_aarch64_post_process_headers (bfd *abfd,
5133 struct bfd_link_info *link_info
5136 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
5138 i_ehdrp = elf_elfheader (abfd);
5139 i_ehdrp->e_ident[EI_OSABI] = 0;
5140 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
5143 static enum elf_reloc_type_class
5144 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5145 const asection *rel_sec ATTRIBUTE_UNUSED,
5146 const Elf_Internal_Rela *rela)
5148 switch ((int) ELFNN_R_TYPE (rela->r_info))
5150 case AARCH64_R (RELATIVE):
5151 return reloc_class_relative;
5152 case AARCH64_R (JUMP_SLOT):
5153 return reloc_class_plt;
5154 case AARCH64_R (COPY):
5155 return reloc_class_copy;
5157 return reloc_class_normal;
5161 /* Set the right machine number for an AArch64 ELF file. */
5164 elfNN_aarch64_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
5166 if (hdr->sh_type == SHT_NOTE)
5167 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5172 /* Handle an AArch64 specific section when reading an object file. This is
5173 called when bfd_section_from_shdr finds a section with an unknown
5177 elfNN_aarch64_section_from_shdr (bfd *abfd,
5178 Elf_Internal_Shdr *hdr,
5179 const char *name, int shindex)
5181 /* There ought to be a place to keep ELF backend specific flags, but
5182 at the moment there isn't one. We just keep track of the
5183 sections by their name, instead. Fortunately, the ABI gives
5184 names for all the AArch64 specific sections, so we will probably get
5186 switch (hdr->sh_type)
5188 case SHT_AARCH64_ATTRIBUTES:
5195 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5201 /* A structure used to record a list of sections, independently
5202 of the next and prev fields in the asection structure. */
5203 typedef struct section_list
5206 struct section_list *next;
5207 struct section_list *prev;
5211 /* Unfortunately we need to keep a list of sections for which
5212 an _aarch64_elf_section_data structure has been allocated. This
5213 is because it is possible for functions like elfNN_aarch64_write_section
5214 to be called on a section which has had an elf_data_structure
5215 allocated for it (and so the used_by_bfd field is valid) but
5216 for which the AArch64 extended version of this structure - the
5217 _aarch64_elf_section_data structure - has not been allocated. */
5218 static section_list *sections_with_aarch64_elf_section_data = NULL;
5221 record_section_with_aarch64_elf_section_data (asection *sec)
5223 struct section_list *entry;
5225 entry = bfd_malloc (sizeof (*entry));
5229 entry->next = sections_with_aarch64_elf_section_data;
5231 if (entry->next != NULL)
5232 entry->next->prev = entry;
5233 sections_with_aarch64_elf_section_data = entry;
5236 static struct section_list *
5237 find_aarch64_elf_section_entry (asection *sec)
5239 struct section_list *entry;
5240 static struct section_list *last_entry = NULL;
5242 /* This is a short cut for the typical case where the sections are added
5243 to the sections_with_aarch64_elf_section_data list in forward order and
5244 then looked up here in backwards order. This makes a real difference
5245 to the ld-srec/sec64k.exp linker test. */
5246 entry = sections_with_aarch64_elf_section_data;
5247 if (last_entry != NULL)
5249 if (last_entry->sec == sec)
5251 else if (last_entry->next != NULL && last_entry->next->sec == sec)
5252 entry = last_entry->next;
5255 for (; entry; entry = entry->next)
5256 if (entry->sec == sec)
5260 /* Record the entry prior to this one - it is the entry we are
5261 most likely to want to locate next time. Also this way if we
5262 have been called from
5263 unrecord_section_with_aarch64_elf_section_data () we will not
5264 be caching a pointer that is about to be freed. */
5265 last_entry = entry->prev;
5271 unrecord_section_with_aarch64_elf_section_data (asection *sec)
5273 struct section_list *entry;
5275 entry = find_aarch64_elf_section_entry (sec);
5279 if (entry->prev != NULL)
5280 entry->prev->next = entry->next;
5281 if (entry->next != NULL)
5282 entry->next->prev = entry->prev;
5283 if (entry == sections_with_aarch64_elf_section_data)
5284 sections_with_aarch64_elf_section_data = entry->next;
5293 struct bfd_link_info *info;
5296 int (*func) (void *, const char *, Elf_Internal_Sym *,
5297 asection *, struct elf_link_hash_entry *);
5298 } output_arch_syminfo;
5300 enum map_symbol_type
5307 /* Output a single mapping symbol. */
5310 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
5311 enum map_symbol_type type, bfd_vma offset)
5313 static const char *names[2] = { "$x", "$d" };
5314 Elf_Internal_Sym sym;
5316 sym.st_value = (osi->sec->output_section->vma
5317 + osi->sec->output_offset + offset);
5320 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
5321 sym.st_shndx = osi->sec_shndx;
5322 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
5327 /* Output mapping symbols for PLT entries associated with H. */
5330 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
5332 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
5335 if (h->root.type == bfd_link_hash_indirect)
5338 if (h->root.type == bfd_link_hash_warning)
5339 /* When warning symbols are created, they **replace** the "real"
5340 entry in the hash table, thus we never get to see the real
5341 symbol in a hash traversal. So look at it now. */
5342 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5344 if (h->plt.offset == (bfd_vma) - 1)
5347 addr = h->plt.offset;
5350 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
5357 /* Output a single local symbol for a generated stub. */
5360 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
5361 bfd_vma offset, bfd_vma size)
5363 Elf_Internal_Sym sym;
5365 sym.st_value = (osi->sec->output_section->vma
5366 + osi->sec->output_offset + offset);
5369 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
5370 sym.st_shndx = osi->sec_shndx;
5371 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
5375 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
5377 struct elf_aarch64_stub_hash_entry *stub_entry;
5381 output_arch_syminfo *osi;
5383 /* Massage our args to the form they really have. */
5384 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
5385 osi = (output_arch_syminfo *) in_arg;
5387 stub_sec = stub_entry->stub_sec;
5389 /* Ensure this stub is attached to the current section being
5391 if (stub_sec != osi->sec)
5394 addr = (bfd_vma) stub_entry->stub_offset;
5396 stub_name = stub_entry->output_name;
5398 switch (stub_entry->stub_type)
5400 case aarch64_stub_adrp_branch:
5401 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
5402 sizeof (aarch64_adrp_branch_stub)))
5404 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
5407 case aarch64_stub_long_branch:
5408 if (!elfNN_aarch64_output_stub_sym
5409 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
5411 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
5413 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
5423 /* Output mapping symbols for linker generated sections. */
5426 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
5427 struct bfd_link_info *info,
5429 int (*func) (void *, const char *,
5432 struct elf_link_hash_entry
5435 output_arch_syminfo osi;
5436 struct elf_aarch64_link_hash_table *htab;
5438 htab = elf_aarch64_hash_table (info);
5444 /* Long calls stubs. */
5445 if (htab->stub_bfd && htab->stub_bfd->sections)
5449 for (stub_sec = htab->stub_bfd->sections;
5450 stub_sec != NULL; stub_sec = stub_sec->next)
5452 /* Ignore non-stub sections. */
5453 if (!strstr (stub_sec->name, STUB_SUFFIX))
5458 osi.sec_shndx = _bfd_elf_section_from_bfd_section
5459 (output_bfd, osi.sec->output_section);
5461 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
5466 /* Finally, output mapping symbols for the PLT. */
5467 if (!htab->root.splt || htab->root.splt->size == 0)
5470 /* For now live without mapping symbols for the plt. */
5471 osi.sec_shndx = _bfd_elf_section_from_bfd_section
5472 (output_bfd, htab->root.splt->output_section);
5473 osi.sec = htab->root.splt;
5475 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
5482 /* Allocate target specific section data. */
5485 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
5487 if (!sec->used_by_bfd)
5489 _aarch64_elf_section_data *sdata;
5490 bfd_size_type amt = sizeof (*sdata);
5492 sdata = bfd_zalloc (abfd, amt);
5495 sec->used_by_bfd = sdata;
5498 record_section_with_aarch64_elf_section_data (sec);
5500 return _bfd_elf_new_section_hook (abfd, sec);
5505 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
5507 void *ignore ATTRIBUTE_UNUSED)
5509 unrecord_section_with_aarch64_elf_section_data (sec);
5513 elfNN_aarch64_close_and_cleanup (bfd *abfd)
5516 bfd_map_over_sections (abfd,
5517 unrecord_section_via_map_over_sections, NULL);
5519 return _bfd_elf_close_and_cleanup (abfd);
5523 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
5526 bfd_map_over_sections (abfd,
5527 unrecord_section_via_map_over_sections, NULL);
5529 return _bfd_free_cached_info (abfd);
5533 elfNN_aarch64_is_function_type (unsigned int type)
5535 return type == STT_FUNC;
5538 /* Create dynamic sections. This is different from the ARM backend in that
5539 the got, plt, gotplt and their relocation sections are all created in the
5540 standard part of the bfd elf backend. */
5543 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
5544 struct bfd_link_info *info)
5546 struct elf_aarch64_link_hash_table *htab;
5548 /* We need to create .got section. */
5549 if (!aarch64_elf_create_got_section (dynobj, info))
5552 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
5555 htab = elf_aarch64_hash_table (info);
5556 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
5558 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
5560 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
5567 /* Allocate space in .plt, .got and associated reloc sections for
5571 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5573 struct bfd_link_info *info;
5574 struct elf_aarch64_link_hash_table *htab;
5575 struct elf_aarch64_link_hash_entry *eh;
5576 struct elf_dyn_relocs *p;
5578 /* An example of a bfd_link_hash_indirect symbol is versioned
5579 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
5580 -> __gxx_personality_v0(bfd_link_hash_defined)
5582 There is no need to process bfd_link_hash_indirect symbols here
5583 because we will also be presented with the concrete instance of
5584 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
5585 called to copy all relevant data from the generic to the concrete
5588 if (h->root.type == bfd_link_hash_indirect)
5591 if (h->root.type == bfd_link_hash_warning)
5592 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5594 info = (struct bfd_link_info *) inf;
5595 htab = elf_aarch64_hash_table (info);
5597 if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
5599 /* Make sure this symbol is output as a dynamic symbol.
5600 Undefined weak syms won't yet be marked as dynamic. */
5601 if (h->dynindx == -1 && !h->forced_local)
5603 if (!bfd_elf_link_record_dynamic_symbol (info, h))
5607 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5609 asection *s = htab->root.splt;
5611 /* If this is the first .plt entry, make room for the special
5614 s->size += htab->plt_header_size;
5616 h->plt.offset = s->size;
5618 /* If this symbol is not defined in a regular file, and we are
5619 not generating a shared library, then set the symbol to this
5620 location in the .plt. This is required to make function
5621 pointers compare as equal between the normal executable and
5622 the shared library. */
5623 if (!info->shared && !h->def_regular)
5625 h->root.u.def.section = s;
5626 h->root.u.def.value = h->plt.offset;
5629 /* Make room for this entry. For now we only create the
5630 small model PLT entries. We later need to find a way
5631 of relaxing into these from the large model PLT entries. */
5632 s->size += PLT_SMALL_ENTRY_SIZE;
5634 /* We also need to make an entry in the .got.plt section, which
5635 will be placed in the .got section by the linker script. */
5636 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
5638 /* We also need to make an entry in the .rela.plt section. */
5639 htab->root.srelplt->size += RELOC_SIZE (htab);
5641 /* We need to ensure that all GOT entries that serve the PLT
5642 are consecutive with the special GOT slots [0] [1] and
5643 [2]. Any addtional relocations, such as
5644 R_AARCH64_TLSDESC, must be placed after the PLT related
5645 entries. We abuse the reloc_count such that during
5646 sizing we adjust reloc_count to indicate the number of
5647 PLT related reserved entries. In subsequent phases when
5648 filling in the contents of the reloc entries, PLT related
5649 entries are placed by computing their PLT index (0
5650 .. reloc_count). While other none PLT relocs are placed
5651 at the slot indicated by reloc_count and reloc_count is
5654 htab->root.srelplt->reloc_count++;
5658 h->plt.offset = (bfd_vma) - 1;
5664 h->plt.offset = (bfd_vma) - 1;
5668 eh = (struct elf_aarch64_link_hash_entry *) h;
5669 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
5671 if (h->got.refcount > 0)
5674 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
5676 h->got.offset = (bfd_vma) - 1;
5678 dyn = htab->root.dynamic_sections_created;
5680 /* Make sure this symbol is output as a dynamic symbol.
5681 Undefined weak syms won't yet be marked as dynamic. */
5682 if (dyn && h->dynindx == -1 && !h->forced_local)
5684 if (!bfd_elf_link_record_dynamic_symbol (info, h))
5688 if (got_type == GOT_UNKNOWN)
5691 else if (got_type == GOT_NORMAL)
5693 h->got.offset = htab->root.sgot->size;
5694 htab->root.sgot->size += GOT_ENTRY_SIZE;
5695 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5696 || h->root.type != bfd_link_hash_undefweak)
5698 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5700 htab->root.srelgot->size += RELOC_SIZE (htab);
5706 if (got_type & GOT_TLSDESC_GD)
5708 eh->tlsdesc_got_jump_table_offset =
5709 (htab->root.sgotplt->size
5710 - aarch64_compute_jump_table_size (htab));
5711 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
5712 h->got.offset = (bfd_vma) - 2;
5715 if (got_type & GOT_TLS_GD)
5717 h->got.offset = htab->root.sgot->size;
5718 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
5721 if (got_type & GOT_TLS_IE)
5723 h->got.offset = htab->root.sgot->size;
5724 htab->root.sgot->size += GOT_ENTRY_SIZE;
5727 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5728 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5729 || h->root.type != bfd_link_hash_undefweak)
5732 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5734 if (got_type & GOT_TLSDESC_GD)
5736 htab->root.srelplt->size += RELOC_SIZE (htab);
5737 /* Note reloc_count not incremented here! We have
5738 already adjusted reloc_count for this relocation
5741 /* TLSDESC PLT is now needed, but not yet determined. */
5742 htab->tlsdesc_plt = (bfd_vma) - 1;
5745 if (got_type & GOT_TLS_GD)
5746 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
5748 if (got_type & GOT_TLS_IE)
5749 htab->root.srelgot->size += RELOC_SIZE (htab);
5755 h->got.offset = (bfd_vma) - 1;
5758 if (eh->dyn_relocs == NULL)
5761 /* In the shared -Bsymbolic case, discard space allocated for
5762 dynamic pc-relative relocs against symbols which turn out to be
5763 defined in regular objects. For the normal shared case, discard
5764 space for pc-relative relocs that have become local due to symbol
5765 visibility changes. */
5769 /* Relocs that use pc_count are those that appear on a call
5770 insn, or certain REL relocs that can generated via assembly.
5771 We want calls to protected symbols to resolve directly to the
5772 function rather than going via the plt. If people want
5773 function pointer comparisons to work as expected then they
5774 should avoid writing weird assembly. */
5775 if (SYMBOL_CALLS_LOCAL (info, h))
5777 struct elf_dyn_relocs **pp;
5779 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
5781 p->count -= p->pc_count;
5790 /* Also discard relocs on undefined weak syms with non-default
5792 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
5794 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5795 eh->dyn_relocs = NULL;
5797 /* Make sure undefined weak symbols are output as a dynamic
5799 else if (h->dynindx == -1
5801 && !bfd_elf_link_record_dynamic_symbol (info, h))
5806 else if (ELIMINATE_COPY_RELOCS)
5808 /* For the non-shared case, discard space for relocs against
5809 symbols which turn out to need copy relocs or are not
5815 || (htab->root.dynamic_sections_created
5816 && (h->root.type == bfd_link_hash_undefweak
5817 || h->root.type == bfd_link_hash_undefined))))
5819 /* Make sure this symbol is output as a dynamic symbol.
5820 Undefined weak syms won't yet be marked as dynamic. */
5821 if (h->dynindx == -1
5823 && !bfd_elf_link_record_dynamic_symbol (info, h))
5826 /* If that succeeded, we know we'll be keeping all the
5828 if (h->dynindx != -1)
5832 eh->dyn_relocs = NULL;
5837 /* Finally, allocate space. */
5838 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5842 sreloc = elf_section_data (p->sec)->sreloc;
5844 BFD_ASSERT (sreloc != NULL);
5846 sreloc->size += p->count * RELOC_SIZE (htab);
5853 /* This is the most important function of all . Innocuosly named
5856 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5857 struct bfd_link_info *info)
5859 struct elf_aarch64_link_hash_table *htab;
5865 htab = elf_aarch64_hash_table ((info));
5866 dynobj = htab->root.dynobj;
5868 BFD_ASSERT (dynobj != NULL);
5870 if (htab->root.dynamic_sections_created)
5872 if (info->executable)
5874 s = bfd_get_linker_section (dynobj, ".interp");
5877 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5878 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5882 /* Set up .got offsets for local syms, and space for local dynamic
5884 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5886 struct elf_aarch64_local_symbol *locals = NULL;
5887 Elf_Internal_Shdr *symtab_hdr;
5891 if (!is_aarch64_elf (ibfd))
5894 for (s = ibfd->sections; s != NULL; s = s->next)
5896 struct elf_dyn_relocs *p;
5898 for (p = (struct elf_dyn_relocs *)
5899 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
5901 if (!bfd_is_abs_section (p->sec)
5902 && bfd_is_abs_section (p->sec->output_section))
5904 /* Input section has been discarded, either because
5905 it is a copy of a linkonce section or due to
5906 linker script /DISCARD/, so we'll be discarding
5909 else if (p->count != 0)
5911 srel = elf_section_data (p->sec)->sreloc;
5912 srel->size += p->count * RELOC_SIZE (htab);
5913 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5914 info->flags |= DF_TEXTREL;
5919 locals = elf_aarch64_locals (ibfd);
5923 symtab_hdr = &elf_symtab_hdr (ibfd);
5924 srel = htab->root.srelgot;
5925 for (i = 0; i < symtab_hdr->sh_info; i++)
5927 locals[i].got_offset = (bfd_vma) - 1;
5928 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
5929 if (locals[i].got_refcount > 0)
5931 unsigned got_type = locals[i].got_type;
5932 if (got_type & GOT_TLSDESC_GD)
5934 locals[i].tlsdesc_got_jump_table_offset =
5935 (htab->root.sgotplt->size
5936 - aarch64_compute_jump_table_size (htab));
5937 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
5938 locals[i].got_offset = (bfd_vma) - 2;
5941 if (got_type & GOT_TLS_GD)
5943 locals[i].got_offset = htab->root.sgot->size;
5944 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
5947 if (got_type & GOT_TLS_IE)
5949 locals[i].got_offset = htab->root.sgot->size;
5950 htab->root.sgot->size += GOT_ENTRY_SIZE;
5953 if (got_type == GOT_UNKNOWN)
5957 if (got_type == GOT_NORMAL)
5963 if (got_type & GOT_TLSDESC_GD)
5965 htab->root.srelplt->size += RELOC_SIZE (htab);
5966 /* Note RELOC_COUNT not incremented here! */
5967 htab->tlsdesc_plt = (bfd_vma) - 1;
5970 if (got_type & GOT_TLS_GD)
5971 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
5973 if (got_type & GOT_TLS_IE)
5974 htab->root.srelgot->size += RELOC_SIZE (htab);
5979 locals[i].got_refcount = (bfd_vma) - 1;
5985 /* Allocate global sym .plt and .got entries, and space for global
5986 sym dynamic relocs. */
5987 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
5991 /* For every jump slot reserved in the sgotplt, reloc_count is
5992 incremented. However, when we reserve space for TLS descriptors,
5993 it's not incremented, so in order to compute the space reserved
5994 for them, it suffices to multiply the reloc count by the jump
5997 if (htab->root.srelplt)
5998 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
6000 if (htab->tlsdesc_plt)
6002 if (htab->root.splt->size == 0)
6003 htab->root.splt->size += PLT_ENTRY_SIZE;
6005 htab->tlsdesc_plt = htab->root.splt->size;
6006 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
6008 /* If we're not using lazy TLS relocations, don't generate the
6009 GOT entry required. */
6010 if (!(info->flags & DF_BIND_NOW))
6012 htab->dt_tlsdesc_got = htab->root.sgot->size;
6013 htab->root.sgot->size += GOT_ENTRY_SIZE;
6017 /* We now have determined the sizes of the various dynamic sections.
6018 Allocate memory for them. */
6020 for (s = dynobj->sections; s != NULL; s = s->next)
6022 if ((s->flags & SEC_LINKER_CREATED) == 0)
6025 if (s == htab->root.splt
6026 || s == htab->root.sgot
6027 || s == htab->root.sgotplt
6028 || s == htab->root.iplt
6029 || s == htab->root.igotplt || s == htab->sdynbss)
6031 /* Strip this section if we don't need it; see the
6034 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
6036 if (s->size != 0 && s != htab->root.srelplt)
6039 /* We use the reloc_count field as a counter if we need
6040 to copy relocs into the output file. */
6041 if (s != htab->root.srelplt)
6046 /* It's not one of our sections, so don't allocate space. */
6052 /* If we don't need this section, strip it from the
6053 output file. This is mostly to handle .rela.bss and
6054 .rela.plt. We must create both sections in
6055 create_dynamic_sections, because they must be created
6056 before the linker maps input sections to output
6057 sections. The linker does that before
6058 adjust_dynamic_symbol is called, and it is that
6059 function which decides whether anything needs to go
6060 into these sections. */
6062 s->flags |= SEC_EXCLUDE;
6066 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6069 /* Allocate memory for the section contents. We use bfd_zalloc
6070 here in case unused entries are not reclaimed before the
6071 section's contents are written out. This should not happen,
6072 but this way if it does, we get a R_AARCH64_NONE reloc instead
6074 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
6075 if (s->contents == NULL)
6079 if (htab->root.dynamic_sections_created)
6081 /* Add some entries to the .dynamic section. We fill in the
6082 values later, in elfNN_aarch64_finish_dynamic_sections, but we
6083 must add the entries now so that we get the correct size for
6084 the .dynamic section. The DT_DEBUG entry is filled in by the
6085 dynamic linker and used by the debugger. */
6086 #define add_dynamic_entry(TAG, VAL) \
6087 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6089 if (info->executable)
6091 if (!add_dynamic_entry (DT_DEBUG, 0))
6095 if (htab->root.splt->size != 0)
6097 if (!add_dynamic_entry (DT_PLTGOT, 0)
6098 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6099 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6100 || !add_dynamic_entry (DT_JMPREL, 0))
6103 if (htab->tlsdesc_plt
6104 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
6105 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
6111 if (!add_dynamic_entry (DT_RELA, 0)
6112 || !add_dynamic_entry (DT_RELASZ, 0)
6113 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
6116 /* If any dynamic relocs apply to a read-only section,
6117 then we need a DT_TEXTREL entry. */
6118 if ((info->flags & DF_TEXTREL) != 0)
6120 if (!add_dynamic_entry (DT_TEXTREL, 0))
6125 #undef add_dynamic_entry
6131 elf_aarch64_update_plt_entry (bfd *output_bfd,
6132 bfd_reloc_code_real_type r_type,
6133 bfd_byte *plt_entry, bfd_vma value)
6135 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
6137 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
6141 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
6142 struct elf_aarch64_link_hash_table
6143 *htab, bfd *output_bfd)
6145 bfd_byte *plt_entry;
6148 bfd_vma gotplt_entry_address;
6149 bfd_vma plt_entry_address;
6150 Elf_Internal_Rela rela;
6153 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
6155 /* Offset in the GOT is PLT index plus got GOT headers(3)
6156 times GOT_ENTRY_SIZE. */
6157 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
6158 plt_entry = htab->root.splt->contents + h->plt.offset;
6159 plt_entry_address = htab->root.splt->output_section->vma
6160 + htab->root.splt->output_section->output_offset + h->plt.offset;
6161 gotplt_entry_address = htab->root.sgotplt->output_section->vma +
6162 htab->root.sgotplt->output_offset + got_offset;
6164 /* Copy in the boiler-plate for the PLTn entry. */
6165 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
6167 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
6168 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
6169 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
6171 PG (gotplt_entry_address) -
6172 PG (plt_entry_address));
6174 /* Fill in the lo12 bits for the load from the pltgot. */
6175 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
6177 PG_OFFSET (gotplt_entry_address));
6179 /* Fill in the lo12 bits for the add from the pltgot entry. */
6180 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
6182 PG_OFFSET (gotplt_entry_address));
6184 /* All the GOTPLT Entries are essentially initialized to PLT0. */
6185 bfd_put_NN (output_bfd,
6186 (htab->root.splt->output_section->vma
6187 + htab->root.splt->output_offset),
6188 htab->root.sgotplt->contents + got_offset);
6190 /* Fill in the entry in the .rela.plt section. */
6191 rela.r_offset = gotplt_entry_address;
6192 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
6195 /* Compute the relocation entry to used based on PLT index and do
6196 not adjust reloc_count. The reloc_count has already been adjusted
6197 to account for this entry. */
6198 loc = htab->root.srelplt->contents + plt_index * RELOC_SIZE (htab);
6199 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6202 /* Size sections even though they're not dynamic. We use it to setup
6203 _TLS_MODULE_BASE_, if needed. */
6206 elfNN_aarch64_always_size_sections (bfd *output_bfd,
6207 struct bfd_link_info *info)
6211 if (info->relocatable)
6214 tls_sec = elf_hash_table (info)->tls_sec;
6218 struct elf_link_hash_entry *tlsbase;
6220 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
6221 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
6225 struct bfd_link_hash_entry *h = NULL;
6226 const struct elf_backend_data *bed =
6227 get_elf_backend_data (output_bfd);
6229 if (!(_bfd_generic_link_add_one_symbol
6230 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
6231 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
6234 tlsbase->type = STT_TLS;
6235 tlsbase = (struct elf_link_hash_entry *) h;
6236 tlsbase->def_regular = 1;
6237 tlsbase->other = STV_HIDDEN;
6238 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
6245 /* Finish up dynamic symbol handling. We set the contents of various
6246 dynamic sections here. */
6248 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
6249 struct bfd_link_info *info,
6250 struct elf_link_hash_entry *h,
6251 Elf_Internal_Sym *sym)
6253 struct elf_aarch64_link_hash_table *htab;
6254 htab = elf_aarch64_hash_table (info);
6256 if (h->plt.offset != (bfd_vma) - 1)
6258 /* This symbol has an entry in the procedure linkage table. Set
6261 if (h->dynindx == -1
6262 || htab->root.splt == NULL
6263 || htab->root.sgotplt == NULL || htab->root.srelplt == NULL)
6266 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd);
6267 if (!h->def_regular)
6269 /* Mark the symbol as undefined, rather than as defined in
6270 the .plt section. Leave the value alone. This is a clue
6271 for the dynamic linker, to make function pointer
6272 comparisons work between an application and shared
6274 sym->st_shndx = SHN_UNDEF;
6278 if (h->got.offset != (bfd_vma) - 1
6279 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
6281 Elf_Internal_Rela rela;
6284 /* This symbol has an entry in the global offset table. Set it
6286 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
6289 rela.r_offset = (htab->root.sgot->output_section->vma
6290 + htab->root.sgot->output_offset
6291 + (h->got.offset & ~(bfd_vma) 1));
6293 if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
6295 if (!h->def_regular)
6298 BFD_ASSERT ((h->got.offset & 1) != 0);
6299 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
6300 rela.r_addend = (h->root.u.def.value
6301 + h->root.u.def.section->output_section->vma
6302 + h->root.u.def.section->output_offset);
6306 BFD_ASSERT ((h->got.offset & 1) == 0);
6307 bfd_put_NN (output_bfd, (bfd_vma) 0,
6308 htab->root.sgot->contents + h->got.offset);
6309 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
6313 loc = htab->root.srelgot->contents;
6314 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
6315 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6320 Elf_Internal_Rela rela;
6323 /* This symbol needs a copy reloc. Set it up. */
6325 if (h->dynindx == -1
6326 || (h->root.type != bfd_link_hash_defined
6327 && h->root.type != bfd_link_hash_defweak)
6328 || htab->srelbss == NULL)
6331 rela.r_offset = (h->root.u.def.value
6332 + h->root.u.def.section->output_section->vma
6333 + h->root.u.def.section->output_offset);
6334 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
6336 loc = htab->srelbss->contents;
6337 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
6338 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6341 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
6342 be NULL for local symbols. */
6344 && (h == elf_hash_table (info)->hdynamic
6345 || h == elf_hash_table (info)->hgot))
6346 sym->st_shndx = SHN_ABS;
6352 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
6353 struct elf_aarch64_link_hash_table
6356 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
6357 small and large plts and at the minute just generates
6360 /* PLT0 of the small PLT looks like this in ELF64 -
6361 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
6362 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
6363 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
6365 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
6366 // GOTPLT entry for this.
6368 PLT0 will be slightly different in ELF32 due to different got entry
6371 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
6375 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
6377 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
6380 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
6381 + htab->root.sgotplt->output_offset
6382 + GOT_ENTRY_SIZE * 2);
6384 plt_base = htab->root.splt->output_section->vma +
6385 htab->root.splt->output_section->output_offset;
6387 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
6388 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
6389 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
6390 htab->root.splt->contents + 4,
6391 PG (plt_got_2nd_ent) - PG (plt_base + 4));
6393 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
6394 htab->root.splt->contents + 8,
6395 PG_OFFSET (plt_got_2nd_ent));
6397 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
6398 htab->root.splt->contents + 12,
6399 PG_OFFSET (plt_got_2nd_ent));
6403 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
6404 struct bfd_link_info *info)
6406 struct elf_aarch64_link_hash_table *htab;
6410 htab = elf_aarch64_hash_table (info);
6411 dynobj = htab->root.dynobj;
6412 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
6414 if (htab->root.dynamic_sections_created)
6416 ElfNN_External_Dyn *dyncon, *dynconend;
6418 if (sdyn == NULL || htab->root.sgot == NULL)
6421 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
6422 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
6423 for (; dyncon < dynconend; dyncon++)
6425 Elf_Internal_Dyn dyn;
6428 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
6436 s = htab->root.sgotplt;
6437 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6441 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
6445 s = htab->root.srelplt->output_section;
6446 dyn.d_un.d_val = s->size;
6450 /* The procedure linkage table relocs (DT_JMPREL) should
6451 not be included in the overall relocs (DT_RELA).
6452 Therefore, we override the DT_RELASZ entry here to
6453 make it not include the JMPREL relocs. Since the
6454 linker script arranges for .rela.plt to follow all
6455 other relocation sections, we don't have to worry
6456 about changing the DT_RELA entry. */
6457 if (htab->root.srelplt != NULL)
6459 s = htab->root.srelplt->output_section;
6460 dyn.d_un.d_val -= s->size;
6464 case DT_TLSDESC_PLT:
6465 s = htab->root.splt;
6466 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6467 + htab->tlsdesc_plt;
6470 case DT_TLSDESC_GOT:
6471 s = htab->root.sgot;
6472 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6473 + htab->dt_tlsdesc_got;
6477 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
6482 /* Fill in the special first entry in the procedure linkage table. */
6483 if (htab->root.splt && htab->root.splt->size > 0)
6485 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
6487 elf_section_data (htab->root.splt->output_section)->
6488 this_hdr.sh_entsize = htab->plt_entry_size;
6491 if (htab->tlsdesc_plt)
6493 bfd_put_NN (output_bfd, (bfd_vma) 0,
6494 htab->root.sgot->contents + htab->dt_tlsdesc_got);
6496 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
6497 elfNN_aarch64_tlsdesc_small_plt_entry,
6498 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
6501 bfd_vma adrp1_addr =
6502 htab->root.splt->output_section->vma
6503 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
6505 bfd_vma adrp2_addr = adrp1_addr + 4;
6508 htab->root.sgot->output_section->vma
6509 + htab->root.sgot->output_offset;
6511 bfd_vma pltgot_addr =
6512 htab->root.sgotplt->output_section->vma
6513 + htab->root.sgotplt->output_offset;
6515 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
6517 bfd_byte *plt_entry =
6518 htab->root.splt->contents + htab->tlsdesc_plt;
6520 /* adrp x2, DT_TLSDESC_GOT */
6521 elf_aarch64_update_plt_entry (output_bfd,
6522 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
6524 (PG (dt_tlsdesc_got)
6525 - PG (adrp1_addr)));
6528 elf_aarch64_update_plt_entry (output_bfd,
6529 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
6532 - PG (adrp2_addr)));
6534 /* ldr x2, [x2, #0] */
6535 elf_aarch64_update_plt_entry (output_bfd,
6536 BFD_RELOC_AARCH64_LDSTNN_LO12,
6538 PG_OFFSET (dt_tlsdesc_got));
6541 elf_aarch64_update_plt_entry (output_bfd,
6542 BFD_RELOC_AARCH64_ADD_LO12,
6544 PG_OFFSET (pltgot_addr));
6549 if (htab->root.sgotplt)
6551 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
6553 (*_bfd_error_handler)
6554 (_("discarded output section: `%A'"), htab->root.sgotplt);
6558 /* Fill in the first three entries in the global offset table. */
6559 if (htab->root.sgotplt->size > 0)
6561 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
6563 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6564 bfd_put_NN (output_bfd,
6566 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
6567 bfd_put_NN (output_bfd,
6569 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
6572 if (htab->root.sgot)
6574 if (htab->root.sgot->size > 0)
6577 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
6578 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
6582 elf_section_data (htab->root.sgotplt->output_section)->
6583 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
6586 if (htab->root.sgot && htab->root.sgot->size > 0)
6587 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
6593 /* Return address for Ith PLT stub in section PLT, for relocation REL
6594 or (bfd_vma) -1 if it should not be included. */
6597 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
6598 const arelent *rel ATTRIBUTE_UNUSED)
6600 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
6604 /* We use this so we can override certain functions
6605 (though currently we don't). */
6607 const struct elf_size_info elfNN_aarch64_size_info =
6609 sizeof (ElfNN_External_Ehdr),
6610 sizeof (ElfNN_External_Phdr),
6611 sizeof (ElfNN_External_Shdr),
6612 sizeof (ElfNN_External_Rel),
6613 sizeof (ElfNN_External_Rela),
6614 sizeof (ElfNN_External_Sym),
6615 sizeof (ElfNN_External_Dyn),
6616 sizeof (Elf_External_Note),
6617 4, /* Hash table entry size. */
6618 1, /* Internal relocs per external relocs. */
6619 ARCH_SIZE, /* Arch size. */
6620 LOG_FILE_ALIGN, /* Log_file_align. */
6621 ELFCLASSNN, EV_CURRENT,
6622 bfd_elfNN_write_out_phdrs,
6623 bfd_elfNN_write_shdrs_and_ehdr,
6624 bfd_elfNN_checksum_contents,
6625 bfd_elfNN_write_relocs,
6626 bfd_elfNN_swap_symbol_in,
6627 bfd_elfNN_swap_symbol_out,
6628 bfd_elfNN_slurp_reloc_table,
6629 bfd_elfNN_slurp_symbol_table,
6630 bfd_elfNN_swap_dyn_in,
6631 bfd_elfNN_swap_dyn_out,
6632 bfd_elfNN_swap_reloc_in,
6633 bfd_elfNN_swap_reloc_out,
6634 bfd_elfNN_swap_reloca_in,
6635 bfd_elfNN_swap_reloca_out
6638 #define ELF_ARCH bfd_arch_aarch64
6639 #define ELF_MACHINE_CODE EM_AARCH64
6640 #define ELF_MAXPAGESIZE 0x10000
6641 #define ELF_MINPAGESIZE 0x1000
6642 #define ELF_COMMONPAGESIZE 0x1000
6644 #define bfd_elfNN_close_and_cleanup \
6645 elfNN_aarch64_close_and_cleanup
6647 #define bfd_elfNN_bfd_copy_private_bfd_data \
6648 elfNN_aarch64_copy_private_bfd_data
6650 #define bfd_elfNN_bfd_free_cached_info \
6651 elfNN_aarch64_bfd_free_cached_info
6653 #define bfd_elfNN_bfd_is_target_special_symbol \
6654 elfNN_aarch64_is_target_special_symbol
6656 #define bfd_elfNN_bfd_link_hash_table_create \
6657 elfNN_aarch64_link_hash_table_create
6659 #define bfd_elfNN_bfd_link_hash_table_free \
6660 elfNN_aarch64_hash_table_free
6662 #define bfd_elfNN_bfd_merge_private_bfd_data \
6663 elfNN_aarch64_merge_private_bfd_data
6665 #define bfd_elfNN_bfd_print_private_bfd_data \
6666 elfNN_aarch64_print_private_bfd_data
6668 #define bfd_elfNN_bfd_reloc_type_lookup \
6669 elfNN_aarch64_reloc_type_lookup
6671 #define bfd_elfNN_bfd_reloc_name_lookup \
6672 elfNN_aarch64_reloc_name_lookup
6674 #define bfd_elfNN_bfd_set_private_flags \
6675 elfNN_aarch64_set_private_flags
6677 #define bfd_elfNN_find_inliner_info \
6678 elfNN_aarch64_find_inliner_info
6680 #define bfd_elfNN_find_nearest_line \
6681 elfNN_aarch64_find_nearest_line
6683 #define bfd_elfNN_mkobject \
6684 elfNN_aarch64_mkobject
6686 #define bfd_elfNN_new_section_hook \
6687 elfNN_aarch64_new_section_hook
6689 #define elf_backend_adjust_dynamic_symbol \
6690 elfNN_aarch64_adjust_dynamic_symbol
6692 #define elf_backend_always_size_sections \
6693 elfNN_aarch64_always_size_sections
6695 #define elf_backend_check_relocs \
6696 elfNN_aarch64_check_relocs
6698 #define elf_backend_copy_indirect_symbol \
6699 elfNN_aarch64_copy_indirect_symbol
6701 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
6702 to them in our hash. */
6703 #define elf_backend_create_dynamic_sections \
6704 elfNN_aarch64_create_dynamic_sections
6706 #define elf_backend_init_index_section \
6707 _bfd_elf_init_2_index_sections
6709 #define elf_backend_is_function_type \
6710 elfNN_aarch64_is_function_type
6712 #define elf_backend_finish_dynamic_sections \
6713 elfNN_aarch64_finish_dynamic_sections
6715 #define elf_backend_finish_dynamic_symbol \
6716 elfNN_aarch64_finish_dynamic_symbol
6718 #define elf_backend_gc_sweep_hook \
6719 elfNN_aarch64_gc_sweep_hook
6721 #define elf_backend_object_p \
6722 elfNN_aarch64_object_p
6724 #define elf_backend_output_arch_local_syms \
6725 elfNN_aarch64_output_arch_local_syms
6727 #define elf_backend_plt_sym_val \
6728 elfNN_aarch64_plt_sym_val
6730 #define elf_backend_post_process_headers \
6731 elfNN_aarch64_post_process_headers
6733 #define elf_backend_relocate_section \
6734 elfNN_aarch64_relocate_section
6736 #define elf_backend_reloc_type_class \
6737 elfNN_aarch64_reloc_type_class
6739 #define elf_backend_section_flags \
6740 elfNN_aarch64_section_flags
6742 #define elf_backend_section_from_shdr \
6743 elfNN_aarch64_section_from_shdr
6745 #define elf_backend_size_dynamic_sections \
6746 elfNN_aarch64_size_dynamic_sections
6748 #define elf_backend_size_info \
6749 elfNN_aarch64_size_info
6751 #define elf_backend_can_refcount 1
6752 #define elf_backend_can_gc_sections 1
6753 #define elf_backend_plt_readonly 1
6754 #define elf_backend_want_got_plt 1
6755 #define elf_backend_want_plt_sym 0
6756 #define elf_backend_may_use_rel_p 0
6757 #define elf_backend_may_use_rela_p 1
6758 #define elf_backend_default_use_rela_p 1
6759 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
6760 #define elf_backend_default_execstack 0
6762 #undef elf_backend_obj_attrs_section
6763 #define elf_backend_obj_attrs_section ".ARM.attributes"
6765 #include "elfNN-target.h"
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