1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2015 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
21 /* Notes on implementation:
23 Thread Local Store (TLS)
27 The implementation currently supports both traditional TLS and TLS
28 descriptors, but only general dynamic (GD).
30 For traditional TLS the assembler will present us with code
31 fragments of the form:
34 R_AARCH64_TLSGD_ADR_PAGE21(foo)
35 add x0, :tlsgd_lo12:foo
36 R_AARCH64_TLSGD_ADD_LO12_NC(foo)
40 For TLS descriptors the assembler will present us with code
41 fragments of the form:
43 adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo)
44 ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo)
45 add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo)
47 blr x1 R_AARCH64_TLSDESC_CALL(foo)
49 The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo
50 indicate that foo is thread local and should be accessed via the
51 traditional TLS mechanims.
53 The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC}
54 against foo indicate that 'foo' is thread local and should be accessed
55 via a TLS descriptor mechanism.
57 The precise instruction sequence is only relevant from the
58 perspective of linker relaxation which is currently not implemented.
60 The static linker must detect that 'foo' is a TLS object and
61 allocate a double GOT entry. The GOT entry must be created for both
62 global and local TLS symbols. Note that this is different to none
63 TLS local objects which do not need a GOT entry.
65 In the traditional TLS mechanism, the double GOT entry is used to
66 provide the tls_index structure, containing module and offset
67 entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD
68 on the module entry. The loader will subsequently fixup this
69 relocation with the module identity.
71 For global traditional TLS symbols the static linker places an
72 R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader
73 will subsequently fixup the offset. For local TLS symbols the static
74 linker fixes up offset.
76 In the TLS descriptor mechanism the double GOT entry is used to
77 provide the descriptor. The static linker places the relocation
78 R_AARCH64_TLSDESC on the first GOT slot. The loader will
79 subsequently fix this up.
83 The handling of TLS symbols is implemented across a number of
84 different backend functions. The following is a top level view of
85 what processing is performed where.
87 The TLS implementation maintains state information for each TLS
88 symbol. The state information for local and global symbols is kept
89 in different places. Global symbols use generic BFD structures while
90 local symbols use backend specific structures that are allocated and
91 maintained entirely by the backend.
95 elfNN_aarch64_check_relocs()
97 This function is invoked for each relocation.
99 The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and
100 R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are
101 spotted. One time creation of local symbol data structures are
102 created when the first local symbol is seen.
104 The reference count for a symbol is incremented. The GOT type for
105 each symbol is marked as general dynamic.
107 elfNN_aarch64_allocate_dynrelocs ()
109 For each global with positive reference count we allocate a double
110 GOT slot. For a traditional TLS symbol we allocate space for two
111 relocation entries on the GOT, for a TLS descriptor symbol we
112 allocate space for one relocation on the slot. Record the GOT offset
115 elfNN_aarch64_size_dynamic_sections ()
117 Iterate all input BFDS, look for in the local symbol data structure
118 constructed earlier for local TLS symbols and allocate them double
119 GOT slots along with space for a single GOT relocation. Update the
120 local symbol structure to record the GOT offset allocated.
122 elfNN_aarch64_relocate_section ()
124 Calls elfNN_aarch64_final_link_relocate ()
126 Emit the relevant TLS relocations against the GOT for each TLS
127 symbol. For local TLS symbols emit the GOT offset directly. The GOT
128 relocations are emitted once the first time a TLS symbol is
129 encountered. The implementation uses the LSB of the GOT offset to
130 flag that the relevant GOT relocations for a symbol have been
131 emitted. All of the TLS code that uses the GOT offset needs to take
132 care to mask out this flag bit before using the offset.
134 elfNN_aarch64_final_link_relocate ()
136 Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
140 #include "libiberty.h"
142 #include "bfd_stdint.h"
145 #include "objalloc.h"
146 #include "elf/aarch64.h"
147 #include "elfxx-aarch64.h"
152 #define AARCH64_R(NAME) R_AARCH64_ ## NAME
153 #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
154 #define HOWTO64(...) HOWTO (__VA_ARGS__)
155 #define HOWTO32(...) EMPTY_HOWTO (0)
156 #define LOG_FILE_ALIGN 3
160 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
161 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
162 #define HOWTO64(...) EMPTY_HOWTO (0)
163 #define HOWTO32(...) HOWTO (__VA_ARGS__)
164 #define LOG_FILE_ALIGN 2
167 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
168 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12 \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12 \
188 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC \
189 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12 \
190 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12 \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0 \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1 \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2 \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
203 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
204 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
207 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
208 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
209 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
211 #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \
212 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
213 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
214 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
215 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
216 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
217 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \
218 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
219 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
220 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
221 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
222 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
223 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \
224 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
225 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
226 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21)
228 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
229 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
230 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
231 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
232 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
233 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
234 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
235 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
236 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
237 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
238 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
239 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
240 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
242 #define ELIMINATE_COPY_RELOCS 0
244 /* Return size of a relocation entry. HTAB is the bfd's
245 elf_aarch64_link_hash_entry. */
246 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
248 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
249 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
250 #define PLT_ENTRY_SIZE (32)
251 #define PLT_SMALL_ENTRY_SIZE (16)
252 #define PLT_TLSDESC_ENTRY_SIZE (32)
254 /* Encoding of the nop instruction */
255 #define INSN_NOP 0xd503201f
257 #define aarch64_compute_jump_table_size(htab) \
258 (((htab)->root.srelplt == NULL) ? 0 \
259 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
261 /* The first entry in a procedure linkage table looks like this
262 if the distance between the PLTGOT and the PLT is < 4GB use
263 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
264 in x16 and needs to work out PLTGOT[1] by using an address of
265 [x16,#-GOT_ENTRY_SIZE]. */
266 static const bfd_byte elfNN_aarch64_small_plt0_entry
[PLT_ENTRY_SIZE
] =
268 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
269 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
271 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
272 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
274 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
275 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
277 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
278 0x1f, 0x20, 0x03, 0xd5, /* nop */
279 0x1f, 0x20, 0x03, 0xd5, /* nop */
280 0x1f, 0x20, 0x03, 0xd5, /* nop */
283 /* Per function entry in a procedure linkage table looks like this
284 if the distance between the PLTGOT and the PLT is < 4GB use
285 these PLT entries. */
286 static const bfd_byte elfNN_aarch64_small_plt_entry
[PLT_SMALL_ENTRY_SIZE
] =
288 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
290 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
291 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
293 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
294 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
296 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
299 static const bfd_byte
300 elfNN_aarch64_tlsdesc_small_plt_entry
[PLT_TLSDESC_ENTRY_SIZE
] =
302 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
303 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
304 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
306 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
307 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
309 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
310 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
312 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
313 0x1f, 0x20, 0x03, 0xd5, /* nop */
314 0x1f, 0x20, 0x03, 0xd5, /* nop */
317 #define elf_info_to_howto elfNN_aarch64_info_to_howto
318 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
320 #define AARCH64_ELF_ABI_VERSION 0
322 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
323 #define ALL_ONES (~ (bfd_vma) 0)
325 /* Indexed by the bfd interal reloc enumerators.
326 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
329 static reloc_howto_type elfNN_aarch64_howto_table
[] =
333 /* Basic data relocations. */
336 HOWTO (R_AARCH64_NULL
, /* type */
338 3, /* size (0 = byte, 1 = short, 2 = long) */
340 FALSE
, /* pc_relative */
342 complain_overflow_dont
, /* complain_on_overflow */
343 bfd_elf_generic_reloc
, /* special_function */
344 "R_AARCH64_NULL", /* name */
345 FALSE
, /* partial_inplace */
348 FALSE
), /* pcrel_offset */
350 HOWTO (R_AARCH64_NONE
, /* type */
352 3, /* size (0 = byte, 1 = short, 2 = long) */
354 FALSE
, /* pc_relative */
356 complain_overflow_dont
, /* complain_on_overflow */
357 bfd_elf_generic_reloc
, /* special_function */
358 "R_AARCH64_NONE", /* name */
359 FALSE
, /* partial_inplace */
362 FALSE
), /* pcrel_offset */
366 HOWTO64 (AARCH64_R (ABS64
), /* type */
368 4, /* size (4 = long long) */
370 FALSE
, /* pc_relative */
372 complain_overflow_unsigned
, /* complain_on_overflow */
373 bfd_elf_generic_reloc
, /* special_function */
374 AARCH64_R_STR (ABS64
), /* name */
375 FALSE
, /* partial_inplace */
376 ALL_ONES
, /* src_mask */
377 ALL_ONES
, /* dst_mask */
378 FALSE
), /* pcrel_offset */
381 HOWTO (AARCH64_R (ABS32
), /* type */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
385 FALSE
, /* pc_relative */
387 complain_overflow_unsigned
, /* complain_on_overflow */
388 bfd_elf_generic_reloc
, /* special_function */
389 AARCH64_R_STR (ABS32
), /* name */
390 FALSE
, /* partial_inplace */
391 0xffffffff, /* src_mask */
392 0xffffffff, /* dst_mask */
393 FALSE
), /* pcrel_offset */
396 HOWTO (AARCH64_R (ABS16
), /* type */
398 1, /* size (0 = byte, 1 = short, 2 = long) */
400 FALSE
, /* pc_relative */
402 complain_overflow_unsigned
, /* complain_on_overflow */
403 bfd_elf_generic_reloc
, /* special_function */
404 AARCH64_R_STR (ABS16
), /* name */
405 FALSE
, /* partial_inplace */
406 0xffff, /* src_mask */
407 0xffff, /* dst_mask */
408 FALSE
), /* pcrel_offset */
410 /* .xword: (S+A-P) */
411 HOWTO64 (AARCH64_R (PREL64
), /* type */
413 4, /* size (4 = long long) */
415 TRUE
, /* pc_relative */
417 complain_overflow_signed
, /* complain_on_overflow */
418 bfd_elf_generic_reloc
, /* special_function */
419 AARCH64_R_STR (PREL64
), /* name */
420 FALSE
, /* partial_inplace */
421 ALL_ONES
, /* src_mask */
422 ALL_ONES
, /* dst_mask */
423 TRUE
), /* pcrel_offset */
426 HOWTO (AARCH64_R (PREL32
), /* type */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
430 TRUE
, /* pc_relative */
432 complain_overflow_signed
, /* complain_on_overflow */
433 bfd_elf_generic_reloc
, /* special_function */
434 AARCH64_R_STR (PREL32
), /* name */
435 FALSE
, /* partial_inplace */
436 0xffffffff, /* src_mask */
437 0xffffffff, /* dst_mask */
438 TRUE
), /* pcrel_offset */
441 HOWTO (AARCH64_R (PREL16
), /* type */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
445 TRUE
, /* pc_relative */
447 complain_overflow_signed
, /* complain_on_overflow */
448 bfd_elf_generic_reloc
, /* special_function */
449 AARCH64_R_STR (PREL16
), /* name */
450 FALSE
, /* partial_inplace */
451 0xffff, /* src_mask */
452 0xffff, /* dst_mask */
453 TRUE
), /* pcrel_offset */
455 /* Group relocations to create a 16, 32, 48 or 64 bit
456 unsigned data or abs address inline. */
458 /* MOVZ: ((S+A) >> 0) & 0xffff */
459 HOWTO (AARCH64_R (MOVW_UABS_G0
), /* type */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
463 FALSE
, /* pc_relative */
465 complain_overflow_unsigned
, /* complain_on_overflow */
466 bfd_elf_generic_reloc
, /* special_function */
467 AARCH64_R_STR (MOVW_UABS_G0
), /* name */
468 FALSE
, /* partial_inplace */
469 0xffff, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE
), /* pcrel_offset */
473 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
474 HOWTO (AARCH64_R (MOVW_UABS_G0_NC
), /* type */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
478 FALSE
, /* pc_relative */
480 complain_overflow_dont
, /* complain_on_overflow */
481 bfd_elf_generic_reloc
, /* special_function */
482 AARCH64_R_STR (MOVW_UABS_G0_NC
), /* name */
483 FALSE
, /* partial_inplace */
484 0xffff, /* src_mask */
485 0xffff, /* dst_mask */
486 FALSE
), /* pcrel_offset */
488 /* MOVZ: ((S+A) >> 16) & 0xffff */
489 HOWTO (AARCH64_R (MOVW_UABS_G1
), /* type */
491 2, /* size (0 = byte, 1 = short, 2 = long) */
493 FALSE
, /* pc_relative */
495 complain_overflow_unsigned
, /* complain_on_overflow */
496 bfd_elf_generic_reloc
, /* special_function */
497 AARCH64_R_STR (MOVW_UABS_G1
), /* name */
498 FALSE
, /* partial_inplace */
499 0xffff, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE
), /* pcrel_offset */
503 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
504 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC
), /* type */
506 2, /* size (0 = byte, 1 = short, 2 = long) */
508 FALSE
, /* pc_relative */
510 complain_overflow_dont
, /* complain_on_overflow */
511 bfd_elf_generic_reloc
, /* special_function */
512 AARCH64_R_STR (MOVW_UABS_G1_NC
), /* name */
513 FALSE
, /* partial_inplace */
514 0xffff, /* src_mask */
515 0xffff, /* dst_mask */
516 FALSE
), /* pcrel_offset */
518 /* MOVZ: ((S+A) >> 32) & 0xffff */
519 HOWTO64 (AARCH64_R (MOVW_UABS_G2
), /* type */
521 2, /* size (0 = byte, 1 = short, 2 = long) */
523 FALSE
, /* pc_relative */
525 complain_overflow_unsigned
, /* complain_on_overflow */
526 bfd_elf_generic_reloc
, /* special_function */
527 AARCH64_R_STR (MOVW_UABS_G2
), /* name */
528 FALSE
, /* partial_inplace */
529 0xffff, /* src_mask */
530 0xffff, /* dst_mask */
531 FALSE
), /* pcrel_offset */
533 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
534 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC
), /* type */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
538 FALSE
, /* pc_relative */
540 complain_overflow_dont
, /* complain_on_overflow */
541 bfd_elf_generic_reloc
, /* special_function */
542 AARCH64_R_STR (MOVW_UABS_G2_NC
), /* name */
543 FALSE
, /* partial_inplace */
544 0xffff, /* src_mask */
545 0xffff, /* dst_mask */
546 FALSE
), /* pcrel_offset */
548 /* MOVZ: ((S+A) >> 48) & 0xffff */
549 HOWTO64 (AARCH64_R (MOVW_UABS_G3
), /* type */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
553 FALSE
, /* pc_relative */
555 complain_overflow_unsigned
, /* complain_on_overflow */
556 bfd_elf_generic_reloc
, /* special_function */
557 AARCH64_R_STR (MOVW_UABS_G3
), /* name */
558 FALSE
, /* partial_inplace */
559 0xffff, /* src_mask */
560 0xffff, /* dst_mask */
561 FALSE
), /* pcrel_offset */
563 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
564 signed data or abs address inline. Will change instruction
565 to MOVN or MOVZ depending on sign of calculated value. */
567 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
568 HOWTO (AARCH64_R (MOVW_SABS_G0
), /* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 FALSE
, /* pc_relative */
574 complain_overflow_signed
, /* complain_on_overflow */
575 bfd_elf_generic_reloc
, /* special_function */
576 AARCH64_R_STR (MOVW_SABS_G0
), /* name */
577 FALSE
, /* partial_inplace */
578 0xffff, /* src_mask */
579 0xffff, /* dst_mask */
580 FALSE
), /* pcrel_offset */
582 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
583 HOWTO64 (AARCH64_R (MOVW_SABS_G1
), /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE
, /* pc_relative */
589 complain_overflow_signed
, /* complain_on_overflow */
590 bfd_elf_generic_reloc
, /* special_function */
591 AARCH64_R_STR (MOVW_SABS_G1
), /* name */
592 FALSE
, /* partial_inplace */
593 0xffff, /* src_mask */
594 0xffff, /* dst_mask */
595 FALSE
), /* pcrel_offset */
597 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
598 HOWTO64 (AARCH64_R (MOVW_SABS_G2
), /* type */
600 2, /* size (0 = byte, 1 = short, 2 = long) */
602 FALSE
, /* pc_relative */
604 complain_overflow_signed
, /* complain_on_overflow */
605 bfd_elf_generic_reloc
, /* special_function */
606 AARCH64_R_STR (MOVW_SABS_G2
), /* name */
607 FALSE
, /* partial_inplace */
608 0xffff, /* src_mask */
609 0xffff, /* dst_mask */
610 FALSE
), /* pcrel_offset */
612 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
613 addresses: PG(x) is (x & ~0xfff). */
615 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
616 HOWTO (AARCH64_R (LD_PREL_LO19
), /* type */
618 2, /* size (0 = byte, 1 = short, 2 = long) */
620 TRUE
, /* pc_relative */
622 complain_overflow_signed
, /* complain_on_overflow */
623 bfd_elf_generic_reloc
, /* special_function */
624 AARCH64_R_STR (LD_PREL_LO19
), /* name */
625 FALSE
, /* partial_inplace */
626 0x7ffff, /* src_mask */
627 0x7ffff, /* dst_mask */
628 TRUE
), /* pcrel_offset */
630 /* ADR: (S+A-P) & 0x1fffff */
631 HOWTO (AARCH64_R (ADR_PREL_LO21
), /* type */
633 2, /* size (0 = byte, 1 = short, 2 = long) */
635 TRUE
, /* pc_relative */
637 complain_overflow_signed
, /* complain_on_overflow */
638 bfd_elf_generic_reloc
, /* special_function */
639 AARCH64_R_STR (ADR_PREL_LO21
), /* name */
640 FALSE
, /* partial_inplace */
641 0x1fffff, /* src_mask */
642 0x1fffff, /* dst_mask */
643 TRUE
), /* pcrel_offset */
645 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
646 HOWTO (AARCH64_R (ADR_PREL_PG_HI21
), /* type */
648 2, /* size (0 = byte, 1 = short, 2 = long) */
650 TRUE
, /* pc_relative */
652 complain_overflow_signed
, /* complain_on_overflow */
653 bfd_elf_generic_reloc
, /* special_function */
654 AARCH64_R_STR (ADR_PREL_PG_HI21
), /* name */
655 FALSE
, /* partial_inplace */
656 0x1fffff, /* src_mask */
657 0x1fffff, /* dst_mask */
658 TRUE
), /* pcrel_offset */
660 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
661 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC
), /* type */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
665 TRUE
, /* pc_relative */
667 complain_overflow_dont
, /* complain_on_overflow */
668 bfd_elf_generic_reloc
, /* special_function */
669 AARCH64_R_STR (ADR_PREL_PG_HI21_NC
), /* name */
670 FALSE
, /* partial_inplace */
671 0x1fffff, /* src_mask */
672 0x1fffff, /* dst_mask */
673 TRUE
), /* pcrel_offset */
675 /* ADD: (S+A) & 0xfff [no overflow check] */
676 HOWTO (AARCH64_R (ADD_ABS_LO12_NC
), /* type */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
680 FALSE
, /* pc_relative */
682 complain_overflow_dont
, /* complain_on_overflow */
683 bfd_elf_generic_reloc
, /* special_function */
684 AARCH64_R_STR (ADD_ABS_LO12_NC
), /* name */
685 FALSE
, /* partial_inplace */
686 0x3ffc00, /* src_mask */
687 0x3ffc00, /* dst_mask */
688 FALSE
), /* pcrel_offset */
690 /* LD/ST8: (S+A) & 0xfff */
691 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC
), /* type */
693 2, /* size (0 = byte, 1 = short, 2 = long) */
695 FALSE
, /* pc_relative */
697 complain_overflow_dont
, /* complain_on_overflow */
698 bfd_elf_generic_reloc
, /* special_function */
699 AARCH64_R_STR (LDST8_ABS_LO12_NC
), /* name */
700 FALSE
, /* partial_inplace */
701 0xfff, /* src_mask */
702 0xfff, /* dst_mask */
703 FALSE
), /* pcrel_offset */
705 /* Relocations for control-flow instructions. */
707 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
708 HOWTO (AARCH64_R (TSTBR14
), /* type */
710 2, /* size (0 = byte, 1 = short, 2 = long) */
712 TRUE
, /* pc_relative */
714 complain_overflow_signed
, /* complain_on_overflow */
715 bfd_elf_generic_reloc
, /* special_function */
716 AARCH64_R_STR (TSTBR14
), /* name */
717 FALSE
, /* partial_inplace */
718 0x3fff, /* src_mask */
719 0x3fff, /* dst_mask */
720 TRUE
), /* pcrel_offset */
722 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
723 HOWTO (AARCH64_R (CONDBR19
), /* type */
725 2, /* size (0 = byte, 1 = short, 2 = long) */
727 TRUE
, /* pc_relative */
729 complain_overflow_signed
, /* complain_on_overflow */
730 bfd_elf_generic_reloc
, /* special_function */
731 AARCH64_R_STR (CONDBR19
), /* name */
732 FALSE
, /* partial_inplace */
733 0x7ffff, /* src_mask */
734 0x7ffff, /* dst_mask */
735 TRUE
), /* pcrel_offset */
737 /* B: ((S+A-P) >> 2) & 0x3ffffff */
738 HOWTO (AARCH64_R (JUMP26
), /* type */
740 2, /* size (0 = byte, 1 = short, 2 = long) */
742 TRUE
, /* pc_relative */
744 complain_overflow_signed
, /* complain_on_overflow */
745 bfd_elf_generic_reloc
, /* special_function */
746 AARCH64_R_STR (JUMP26
), /* name */
747 FALSE
, /* partial_inplace */
748 0x3ffffff, /* src_mask */
749 0x3ffffff, /* dst_mask */
750 TRUE
), /* pcrel_offset */
752 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
753 HOWTO (AARCH64_R (CALL26
), /* type */
755 2, /* size (0 = byte, 1 = short, 2 = long) */
757 TRUE
, /* pc_relative */
759 complain_overflow_signed
, /* complain_on_overflow */
760 bfd_elf_generic_reloc
, /* special_function */
761 AARCH64_R_STR (CALL26
), /* name */
762 FALSE
, /* partial_inplace */
763 0x3ffffff, /* src_mask */
764 0x3ffffff, /* dst_mask */
765 TRUE
), /* pcrel_offset */
767 /* LD/ST16: (S+A) & 0xffe */
768 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC
), /* type */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
772 FALSE
, /* pc_relative */
774 complain_overflow_dont
, /* complain_on_overflow */
775 bfd_elf_generic_reloc
, /* special_function */
776 AARCH64_R_STR (LDST16_ABS_LO12_NC
), /* name */
777 FALSE
, /* partial_inplace */
778 0xffe, /* src_mask */
779 0xffe, /* dst_mask */
780 FALSE
), /* pcrel_offset */
782 /* LD/ST32: (S+A) & 0xffc */
783 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC
), /* type */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
787 FALSE
, /* pc_relative */
789 complain_overflow_dont
, /* complain_on_overflow */
790 bfd_elf_generic_reloc
, /* special_function */
791 AARCH64_R_STR (LDST32_ABS_LO12_NC
), /* name */
792 FALSE
, /* partial_inplace */
793 0xffc, /* src_mask */
794 0xffc, /* dst_mask */
795 FALSE
), /* pcrel_offset */
797 /* LD/ST64: (S+A) & 0xff8 */
798 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC
), /* type */
800 2, /* size (0 = byte, 1 = short, 2 = long) */
802 FALSE
, /* pc_relative */
804 complain_overflow_dont
, /* complain_on_overflow */
805 bfd_elf_generic_reloc
, /* special_function */
806 AARCH64_R_STR (LDST64_ABS_LO12_NC
), /* name */
807 FALSE
, /* partial_inplace */
808 0xff8, /* src_mask */
809 0xff8, /* dst_mask */
810 FALSE
), /* pcrel_offset */
812 /* LD/ST128: (S+A) & 0xff0 */
813 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC
), /* type */
815 2, /* size (0 = byte, 1 = short, 2 = long) */
817 FALSE
, /* pc_relative */
819 complain_overflow_dont
, /* complain_on_overflow */
820 bfd_elf_generic_reloc
, /* special_function */
821 AARCH64_R_STR (LDST128_ABS_LO12_NC
), /* name */
822 FALSE
, /* partial_inplace */
823 0xff0, /* src_mask */
824 0xff0, /* dst_mask */
825 FALSE
), /* pcrel_offset */
827 /* Set a load-literal immediate field to bits
828 0x1FFFFC of G(S)-P */
829 HOWTO (AARCH64_R (GOT_LD_PREL19
), /* type */
831 2, /* size (0 = byte,1 = short,2 = long) */
833 TRUE
, /* pc_relative */
835 complain_overflow_signed
, /* complain_on_overflow */
836 bfd_elf_generic_reloc
, /* special_function */
837 AARCH64_R_STR (GOT_LD_PREL19
), /* name */
838 FALSE
, /* partial_inplace */
839 0xffffe0, /* src_mask */
840 0xffffe0, /* dst_mask */
841 TRUE
), /* pcrel_offset */
843 /* Get to the page for the GOT entry for the symbol
844 (G(S) - P) using an ADRP instruction. */
845 HOWTO (AARCH64_R (ADR_GOT_PAGE
), /* type */
847 2, /* size (0 = byte, 1 = short, 2 = long) */
849 TRUE
, /* pc_relative */
851 complain_overflow_dont
, /* complain_on_overflow */
852 bfd_elf_generic_reloc
, /* special_function */
853 AARCH64_R_STR (ADR_GOT_PAGE
), /* name */
854 FALSE
, /* partial_inplace */
855 0x1fffff, /* src_mask */
856 0x1fffff, /* dst_mask */
857 TRUE
), /* pcrel_offset */
859 /* LD64: GOT offset G(S) & 0xff8 */
860 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC
), /* type */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
864 FALSE
, /* pc_relative */
866 complain_overflow_dont
, /* complain_on_overflow */
867 bfd_elf_generic_reloc
, /* special_function */
868 AARCH64_R_STR (LD64_GOT_LO12_NC
), /* name */
869 FALSE
, /* partial_inplace */
870 0xff8, /* src_mask */
871 0xff8, /* dst_mask */
872 FALSE
), /* pcrel_offset */
874 /* LD32: GOT offset G(S) & 0xffc */
875 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC
), /* type */
877 2, /* size (0 = byte, 1 = short, 2 = long) */
879 FALSE
, /* pc_relative */
881 complain_overflow_dont
, /* complain_on_overflow */
882 bfd_elf_generic_reloc
, /* special_function */
883 AARCH64_R_STR (LD32_GOT_LO12_NC
), /* name */
884 FALSE
, /* partial_inplace */
885 0xffc, /* src_mask */
886 0xffc, /* dst_mask */
887 FALSE
), /* pcrel_offset */
889 /* Lower 16 bits of GOT offset for the symbol. */
890 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC
), /* type */
892 2, /* size (0 = byte, 1 = short, 2 = long) */
894 FALSE
, /* pc_relative */
896 complain_overflow_dont
, /* complain_on_overflow */
897 bfd_elf_generic_reloc
, /* special_function */
898 AARCH64_R_STR (MOVW_GOTOFF_G0_NC
), /* name */
899 FALSE
, /* partial_inplace */
900 0xffff, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE
), /* pcrel_offset */
904 /* Higher 16 bits of GOT offset for the symbol. */
905 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1
), /* type */
907 2, /* size (0 = byte, 1 = short, 2 = long) */
909 FALSE
, /* pc_relative */
911 complain_overflow_unsigned
, /* complain_on_overflow */
912 bfd_elf_generic_reloc
, /* special_function */
913 AARCH64_R_STR (MOVW_GOTOFF_G1
), /* name */
914 FALSE
, /* partial_inplace */
915 0xffff, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE
), /* pcrel_offset */
919 /* LD64: GOT offset for the symbol. */
920 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15
), /* type */
922 2, /* size (0 = byte, 1 = short, 2 = long) */
924 FALSE
, /* pc_relative */
926 complain_overflow_unsigned
, /* complain_on_overflow */
927 bfd_elf_generic_reloc
, /* special_function */
928 AARCH64_R_STR (LD64_GOTOFF_LO15
), /* name */
929 FALSE
, /* partial_inplace */
930 0x7ff8, /* src_mask */
931 0x7ff8, /* dst_mask */
932 FALSE
), /* pcrel_offset */
934 /* LD32: GOT offset to the page address of GOT table.
935 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
936 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14
), /* type */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
940 FALSE
, /* pc_relative */
942 complain_overflow_unsigned
, /* complain_on_overflow */
943 bfd_elf_generic_reloc
, /* special_function */
944 AARCH64_R_STR (LD32_GOTPAGE_LO14
), /* name */
945 FALSE
, /* partial_inplace */
946 0x5ffc, /* src_mask */
947 0x5ffc, /* dst_mask */
948 FALSE
), /* pcrel_offset */
950 /* LD64: GOT offset to the page address of GOT table.
951 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
952 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15
), /* type */
954 2, /* size (0 = byte, 1 = short, 2 = long) */
956 FALSE
, /* pc_relative */
958 complain_overflow_unsigned
, /* complain_on_overflow */
959 bfd_elf_generic_reloc
, /* special_function */
960 AARCH64_R_STR (LD64_GOTPAGE_LO15
), /* name */
961 FALSE
, /* partial_inplace */
962 0x7ff8, /* src_mask */
963 0x7ff8, /* dst_mask */
964 FALSE
), /* pcrel_offset */
966 /* Get to the page for the GOT entry for the symbol
967 (G(S) - P) using an ADRP instruction. */
968 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21
), /* type */
970 2, /* size (0 = byte, 1 = short, 2 = long) */
972 TRUE
, /* pc_relative */
974 complain_overflow_dont
, /* complain_on_overflow */
975 bfd_elf_generic_reloc
, /* special_function */
976 AARCH64_R_STR (TLSGD_ADR_PAGE21
), /* name */
977 FALSE
, /* partial_inplace */
978 0x1fffff, /* src_mask */
979 0x1fffff, /* dst_mask */
980 TRUE
), /* pcrel_offset */
982 HOWTO (AARCH64_R (TLSGD_ADR_PREL21
), /* type */
984 2, /* size (0 = byte, 1 = short, 2 = long) */
986 TRUE
, /* pc_relative */
988 complain_overflow_dont
, /* complain_on_overflow */
989 bfd_elf_generic_reloc
, /* special_function */
990 AARCH64_R_STR (TLSGD_ADR_PREL21
), /* name */
991 FALSE
, /* partial_inplace */
992 0x1fffff, /* src_mask */
993 0x1fffff, /* dst_mask */
994 TRUE
), /* pcrel_offset */
996 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
997 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC
), /* type */
999 2, /* size (0 = byte, 1 = short, 2 = long) */
1001 FALSE
, /* pc_relative */
1003 complain_overflow_dont
, /* complain_on_overflow */
1004 bfd_elf_generic_reloc
, /* special_function */
1005 AARCH64_R_STR (TLSGD_ADD_LO12_NC
), /* name */
1006 FALSE
, /* partial_inplace */
1007 0xfff, /* src_mask */
1008 0xfff, /* dst_mask */
1009 FALSE
), /* pcrel_offset */
1011 /* Lower 16 bits of GOT offset to tls_index. */
1012 HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC
), /* type */
1014 2, /* size (0 = byte, 1 = short, 2 = long) */
1016 FALSE
, /* pc_relative */
1018 complain_overflow_dont
, /* complain_on_overflow */
1019 bfd_elf_generic_reloc
, /* special_function */
1020 AARCH64_R_STR (TLSGD_MOVW_G0_NC
), /* name */
1021 FALSE
, /* partial_inplace */
1022 0xffff, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE
), /* pcrel_offset */
1026 /* Higher 16 bits of GOT offset to tls_index. */
1027 HOWTO64 (AARCH64_R (TLSGD_MOVW_G1
), /* type */
1028 16, /* rightshift */
1029 2, /* size (0 = byte, 1 = short, 2 = long) */
1031 FALSE
, /* pc_relative */
1033 complain_overflow_unsigned
, /* complain_on_overflow */
1034 bfd_elf_generic_reloc
, /* special_function */
1035 AARCH64_R_STR (TLSGD_MOVW_G1
), /* name */
1036 FALSE
, /* partial_inplace */
1037 0xffff, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE
), /* pcrel_offset */
1041 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1
), /* type */
1042 16, /* rightshift */
1043 2, /* size (0 = byte, 1 = short, 2 = long) */
1045 FALSE
, /* pc_relative */
1047 complain_overflow_dont
, /* complain_on_overflow */
1048 bfd_elf_generic_reloc
, /* special_function */
1049 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1
), /* name */
1050 FALSE
, /* partial_inplace */
1051 0xffff, /* src_mask */
1052 0xffff, /* dst_mask */
1053 FALSE
), /* pcrel_offset */
1055 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC
), /* type */
1057 2, /* size (0 = byte, 1 = short, 2 = long) */
1059 FALSE
, /* pc_relative */
1061 complain_overflow_dont
, /* complain_on_overflow */
1062 bfd_elf_generic_reloc
, /* special_function */
1063 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC
), /* name */
1064 FALSE
, /* partial_inplace */
1065 0xffff, /* src_mask */
1066 0xffff, /* dst_mask */
1067 FALSE
), /* pcrel_offset */
1069 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21
), /* type */
1070 12, /* rightshift */
1071 2, /* size (0 = byte, 1 = short, 2 = long) */
1073 FALSE
, /* pc_relative */
1075 complain_overflow_dont
, /* complain_on_overflow */
1076 bfd_elf_generic_reloc
, /* special_function */
1077 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21
), /* name */
1078 FALSE
, /* partial_inplace */
1079 0x1fffff, /* src_mask */
1080 0x1fffff, /* dst_mask */
1081 FALSE
), /* pcrel_offset */
1083 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC
), /* type */
1085 2, /* size (0 = byte, 1 = short, 2 = long) */
1087 FALSE
, /* pc_relative */
1089 complain_overflow_dont
, /* complain_on_overflow */
1090 bfd_elf_generic_reloc
, /* special_function */
1091 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC
), /* name */
1092 FALSE
, /* partial_inplace */
1093 0xff8, /* src_mask */
1094 0xff8, /* dst_mask */
1095 FALSE
), /* pcrel_offset */
1097 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC
), /* type */
1099 2, /* size (0 = byte, 1 = short, 2 = long) */
1101 FALSE
, /* pc_relative */
1103 complain_overflow_dont
, /* complain_on_overflow */
1104 bfd_elf_generic_reloc
, /* special_function */
1105 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC
), /* name */
1106 FALSE
, /* partial_inplace */
1107 0xffc, /* src_mask */
1108 0xffc, /* dst_mask */
1109 FALSE
), /* pcrel_offset */
1111 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19
), /* type */
1113 2, /* size (0 = byte, 1 = short, 2 = long) */
1115 FALSE
, /* pc_relative */
1117 complain_overflow_dont
, /* complain_on_overflow */
1118 bfd_elf_generic_reloc
, /* special_function */
1119 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19
), /* name */
1120 FALSE
, /* partial_inplace */
1121 0x1ffffc, /* src_mask */
1122 0x1ffffc, /* dst_mask */
1123 FALSE
), /* pcrel_offset */
1125 /* ADD: bit[23:12] of byte offset to module TLS base address. */
1126 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12
), /* type */
1127 12, /* rightshift */
1128 2, /* size (0 = byte, 1 = short, 2 = long) */
1130 FALSE
, /* pc_relative */
1132 complain_overflow_unsigned
, /* complain_on_overflow */
1133 bfd_elf_generic_reloc
, /* special_function */
1134 AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12
), /* name */
1135 FALSE
, /* partial_inplace */
1136 0xfff, /* src_mask */
1137 0xfff, /* dst_mask */
1138 FALSE
), /* pcrel_offset */
1140 /* Unsigned 12 bit byte offset to module TLS base address. */
1141 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12
), /* type */
1143 2, /* size (0 = byte, 1 = short, 2 = long) */
1145 FALSE
, /* pc_relative */
1147 complain_overflow_unsigned
, /* complain_on_overflow */
1148 bfd_elf_generic_reloc
, /* special_function */
1149 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12
), /* name */
1150 FALSE
, /* partial_inplace */
1151 0xfff, /* src_mask */
1152 0xfff, /* dst_mask */
1153 FALSE
), /* pcrel_offset */
1155 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1156 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC
), /* type */
1158 2, /* size (0 = byte, 1 = short, 2 = long) */
1160 FALSE
, /* pc_relative */
1162 complain_overflow_dont
, /* complain_on_overflow */
1163 bfd_elf_generic_reloc
, /* special_function */
1164 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC
), /* name */
1165 FALSE
, /* partial_inplace */
1166 0xfff, /* src_mask */
1167 0xfff, /* dst_mask */
1168 FALSE
), /* pcrel_offset */
1170 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1171 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC
), /* type */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1175 FALSE
, /* pc_relative */
1177 complain_overflow_dont
, /* complain_on_overflow */
1178 bfd_elf_generic_reloc
, /* special_function */
1179 AARCH64_R_STR (TLSLD_ADD_LO12_NC
), /* name */
1180 FALSE
, /* partial_inplace */
1181 0xfff, /* src_mask */
1182 0xfff, /* dst_mask */
1183 FALSE
), /* pcrel_offset */
1185 /* Get to the page for the GOT entry for the symbol
1186 (G(S) - P) using an ADRP instruction. */
1187 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21
), /* type */
1188 12, /* rightshift */
1189 2, /* size (0 = byte, 1 = short, 2 = long) */
1191 TRUE
, /* pc_relative */
1193 complain_overflow_signed
, /* complain_on_overflow */
1194 bfd_elf_generic_reloc
, /* special_function */
1195 AARCH64_R_STR (TLSLD_ADR_PAGE21
), /* name */
1196 FALSE
, /* partial_inplace */
1197 0x1fffff, /* src_mask */
1198 0x1fffff, /* dst_mask */
1199 TRUE
), /* pcrel_offset */
1201 HOWTO (AARCH64_R (TLSLD_ADR_PREL21
), /* type */
1203 2, /* size (0 = byte, 1 = short, 2 = long) */
1205 TRUE
, /* pc_relative */
1207 complain_overflow_signed
, /* complain_on_overflow */
1208 bfd_elf_generic_reloc
, /* special_function */
1209 AARCH64_R_STR (TLSLD_ADR_PREL21
), /* name */
1210 FALSE
, /* partial_inplace */
1211 0x1fffff, /* src_mask */
1212 0x1fffff, /* dst_mask */
1213 TRUE
), /* pcrel_offset */
1215 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1216 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12
), /* type */
1218 2, /* size (0 = byte, 1 = short, 2 = long) */
1220 FALSE
, /* pc_relative */
1222 complain_overflow_unsigned
, /* complain_on_overflow */
1223 bfd_elf_generic_reloc
, /* special_function */
1224 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12
), /* name */
1225 FALSE
, /* partial_inplace */
1226 0x1ffc00, /* src_mask */
1227 0x1ffc00, /* dst_mask */
1228 FALSE
), /* pcrel_offset */
1230 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1231 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC
), /* type */
1233 2, /* size (0 = byte, 1 = short, 2 = long) */
1235 FALSE
, /* pc_relative */
1237 complain_overflow_dont
, /* complain_on_overflow */
1238 bfd_elf_generic_reloc
, /* special_function */
1239 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC
), /* name */
1240 FALSE
, /* partial_inplace */
1241 0x1ffc00, /* src_mask */
1242 0x1ffc00, /* dst_mask */
1243 FALSE
), /* pcrel_offset */
1245 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1246 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12
), /* type */
1248 2, /* size (0 = byte, 1 = short, 2 = long) */
1250 FALSE
, /* pc_relative */
1252 complain_overflow_unsigned
, /* complain_on_overflow */
1253 bfd_elf_generic_reloc
, /* special_function */
1254 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12
), /* name */
1255 FALSE
, /* partial_inplace */
1256 0x3ffc00, /* src_mask */
1257 0x3ffc00, /* dst_mask */
1258 FALSE
), /* pcrel_offset */
1260 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1261 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC
), /* type */
1263 2, /* size (0 = byte, 1 = short, 2 = long) */
1265 FALSE
, /* pc_relative */
1267 complain_overflow_dont
, /* complain_on_overflow */
1268 bfd_elf_generic_reloc
, /* special_function */
1269 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC
), /* name */
1270 FALSE
, /* partial_inplace */
1271 0xffc00, /* src_mask */
1272 0xffc00, /* dst_mask */
1273 FALSE
), /* pcrel_offset */
1275 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1276 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12
), /* type */
1278 2, /* size (0 = byte, 1 = short, 2 = long) */
1280 FALSE
, /* pc_relative */
1282 complain_overflow_unsigned
, /* complain_on_overflow */
1283 bfd_elf_generic_reloc
, /* special_function */
1284 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12
), /* name */
1285 FALSE
, /* partial_inplace */
1286 0x3ffc00, /* src_mask */
1287 0x3ffc00, /* dst_mask */
1288 FALSE
), /* pcrel_offset */
1290 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1291 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC
), /* 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 (TLSLD_LDST64_DTPREL_LO12_NC
), /* name */
1300 FALSE
, /* partial_inplace */
1301 0x7fc00, /* src_mask */
1302 0x7fc00, /* dst_mask */
1303 FALSE
), /* pcrel_offset */
1305 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1306 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12
), /* type */
1308 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 FALSE
, /* pc_relative */
1312 complain_overflow_unsigned
, /* complain_on_overflow */
1313 bfd_elf_generic_reloc
, /* special_function */
1314 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12
), /* name */
1315 FALSE
, /* partial_inplace */
1316 0x3ffc00, /* src_mask */
1317 0x3ffc00, /* dst_mask */
1318 FALSE
), /* pcrel_offset */
1320 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1321 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC
), /* type */
1323 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 FALSE
, /* pc_relative */
1327 complain_overflow_dont
, /* complain_on_overflow */
1328 bfd_elf_generic_reloc
, /* special_function */
1329 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC
), /* name */
1330 FALSE
, /* partial_inplace */
1331 0x3ffc00, /* src_mask */
1332 0x3ffc00, /* dst_mask */
1333 FALSE
), /* pcrel_offset */
1335 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1336 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0
), /* type */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1340 FALSE
, /* pc_relative */
1342 complain_overflow_unsigned
, /* complain_on_overflow */
1343 bfd_elf_generic_reloc
, /* special_function */
1344 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0
), /* name */
1345 FALSE
, /* partial_inplace */
1346 0xffff, /* src_mask */
1347 0xffff, /* dst_mask */
1348 FALSE
), /* pcrel_offset */
1350 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1351 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC
), /* type */
1353 2, /* size (0 = byte, 1 = short, 2 = long) */
1355 FALSE
, /* pc_relative */
1357 complain_overflow_dont
, /* complain_on_overflow */
1358 bfd_elf_generic_reloc
, /* special_function */
1359 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC
), /* name */
1360 FALSE
, /* partial_inplace */
1361 0xffff, /* src_mask */
1362 0xffff, /* dst_mask */
1363 FALSE
), /* pcrel_offset */
1365 /* MOVZ: bit[31:16] of byte offset to module TLS base address. */
1366 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1
), /* type */
1367 16, /* rightshift */
1368 2, /* size (0 = byte, 1 = short, 2 = long) */
1370 FALSE
, /* pc_relative */
1372 complain_overflow_unsigned
, /* complain_on_overflow */
1373 bfd_elf_generic_reloc
, /* special_function */
1374 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1
), /* name */
1375 FALSE
, /* partial_inplace */
1376 0xffff, /* src_mask */
1377 0xffff, /* dst_mask */
1378 FALSE
), /* pcrel_offset */
1380 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */
1381 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC
), /* type */
1382 16, /* rightshift */
1383 2, /* size (0 = byte, 1 = short, 2 = long) */
1385 FALSE
, /* pc_relative */
1387 complain_overflow_dont
, /* complain_on_overflow */
1388 bfd_elf_generic_reloc
, /* special_function */
1389 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC
), /* name */
1390 FALSE
, /* partial_inplace */
1391 0xffff, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE
), /* pcrel_offset */
1395 /* MOVZ: bit[47:32] of byte offset to module TLS base address. */
1396 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2
), /* type */
1397 32, /* rightshift */
1398 2, /* size (0 = byte, 1 = short, 2 = long) */
1400 FALSE
, /* pc_relative */
1402 complain_overflow_unsigned
, /* complain_on_overflow */
1403 bfd_elf_generic_reloc
, /* special_function */
1404 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2
), /* name */
1405 FALSE
, /* partial_inplace */
1406 0xffff, /* src_mask */
1407 0xffff, /* dst_mask */
1408 FALSE
), /* pcrel_offset */
1410 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2
), /* type */
1411 32, /* rightshift */
1412 2, /* size (0 = byte, 1 = short, 2 = long) */
1414 FALSE
, /* pc_relative */
1416 complain_overflow_unsigned
, /* complain_on_overflow */
1417 bfd_elf_generic_reloc
, /* special_function */
1418 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2
), /* name */
1419 FALSE
, /* partial_inplace */
1420 0xffff, /* src_mask */
1421 0xffff, /* dst_mask */
1422 FALSE
), /* pcrel_offset */
1424 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1
), /* type */
1425 16, /* rightshift */
1426 2, /* size (0 = byte, 1 = short, 2 = long) */
1428 FALSE
, /* pc_relative */
1430 complain_overflow_dont
, /* complain_on_overflow */
1431 bfd_elf_generic_reloc
, /* special_function */
1432 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1
), /* name */
1433 FALSE
, /* partial_inplace */
1434 0xffff, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE
), /* pcrel_offset */
1438 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC
), /* type */
1439 16, /* rightshift */
1440 2, /* size (0 = byte, 1 = short, 2 = long) */
1442 FALSE
, /* pc_relative */
1444 complain_overflow_dont
, /* complain_on_overflow */
1445 bfd_elf_generic_reloc
, /* special_function */
1446 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC
), /* name */
1447 FALSE
, /* partial_inplace */
1448 0xffff, /* src_mask */
1449 0xffff, /* dst_mask */
1450 FALSE
), /* pcrel_offset */
1452 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0
), /* type */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1456 FALSE
, /* pc_relative */
1458 complain_overflow_dont
, /* complain_on_overflow */
1459 bfd_elf_generic_reloc
, /* special_function */
1460 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0
), /* name */
1461 FALSE
, /* partial_inplace */
1462 0xffff, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE
), /* pcrel_offset */
1466 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
), /* type */
1468 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 FALSE
, /* pc_relative */
1472 complain_overflow_dont
, /* complain_on_overflow */
1473 bfd_elf_generic_reloc
, /* special_function */
1474 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC
), /* name */
1475 FALSE
, /* partial_inplace */
1476 0xffff, /* src_mask */
1477 0xffff, /* dst_mask */
1478 FALSE
), /* pcrel_offset */
1480 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12
), /* type */
1481 12, /* rightshift */
1482 2, /* size (0 = byte, 1 = short, 2 = long) */
1484 FALSE
, /* pc_relative */
1486 complain_overflow_unsigned
, /* complain_on_overflow */
1487 bfd_elf_generic_reloc
, /* special_function */
1488 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12
), /* name */
1489 FALSE
, /* partial_inplace */
1490 0xfff, /* src_mask */
1491 0xfff, /* dst_mask */
1492 FALSE
), /* pcrel_offset */
1494 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12
), /* type */
1496 2, /* size (0 = byte, 1 = short, 2 = long) */
1498 FALSE
, /* pc_relative */
1500 complain_overflow_unsigned
, /* complain_on_overflow */
1501 bfd_elf_generic_reloc
, /* special_function */
1502 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12
), /* name */
1503 FALSE
, /* partial_inplace */
1504 0xfff, /* src_mask */
1505 0xfff, /* dst_mask */
1506 FALSE
), /* pcrel_offset */
1508 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
), /* type */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1512 FALSE
, /* pc_relative */
1514 complain_overflow_dont
, /* complain_on_overflow */
1515 bfd_elf_generic_reloc
, /* special_function */
1516 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC
), /* name */
1517 FALSE
, /* partial_inplace */
1518 0xfff, /* src_mask */
1519 0xfff, /* dst_mask */
1520 FALSE
), /* pcrel_offset */
1522 HOWTO (AARCH64_R (TLSDESC_LD_PREL19
), /* type */
1524 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 TRUE
, /* pc_relative */
1528 complain_overflow_dont
, /* complain_on_overflow */
1529 bfd_elf_generic_reloc
, /* special_function */
1530 AARCH64_R_STR (TLSDESC_LD_PREL19
), /* name */
1531 FALSE
, /* partial_inplace */
1532 0x0ffffe0, /* src_mask */
1533 0x0ffffe0, /* dst_mask */
1534 TRUE
), /* pcrel_offset */
1536 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21
), /* type */
1538 2, /* size (0 = byte, 1 = short, 2 = long) */
1540 TRUE
, /* pc_relative */
1542 complain_overflow_dont
, /* complain_on_overflow */
1543 bfd_elf_generic_reloc
, /* special_function */
1544 AARCH64_R_STR (TLSDESC_ADR_PREL21
), /* name */
1545 FALSE
, /* partial_inplace */
1546 0x1fffff, /* src_mask */
1547 0x1fffff, /* dst_mask */
1548 TRUE
), /* pcrel_offset */
1550 /* Get to the page for the GOT entry for the symbol
1551 (G(S) - P) using an ADRP instruction. */
1552 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21
), /* type */
1553 12, /* rightshift */
1554 2, /* size (0 = byte, 1 = short, 2 = long) */
1556 TRUE
, /* pc_relative */
1558 complain_overflow_dont
, /* complain_on_overflow */
1559 bfd_elf_generic_reloc
, /* special_function */
1560 AARCH64_R_STR (TLSDESC_ADR_PAGE21
), /* name */
1561 FALSE
, /* partial_inplace */
1562 0x1fffff, /* src_mask */
1563 0x1fffff, /* dst_mask */
1564 TRUE
), /* pcrel_offset */
1566 /* LD64: GOT offset G(S) & 0xff8. */
1567 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC
), /* type */
1569 2, /* size (0 = byte, 1 = short, 2 = long) */
1571 FALSE
, /* pc_relative */
1573 complain_overflow_dont
, /* complain_on_overflow */
1574 bfd_elf_generic_reloc
, /* special_function */
1575 AARCH64_R_STR (TLSDESC_LD64_LO12_NC
), /* name */
1576 FALSE
, /* partial_inplace */
1577 0xff8, /* src_mask */
1578 0xff8, /* dst_mask */
1579 FALSE
), /* pcrel_offset */
1581 /* LD32: GOT offset G(S) & 0xffc. */
1582 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC
), /* type */
1584 2, /* size (0 = byte, 1 = short, 2 = long) */
1586 FALSE
, /* pc_relative */
1588 complain_overflow_dont
, /* complain_on_overflow */
1589 bfd_elf_generic_reloc
, /* special_function */
1590 AARCH64_R_STR (TLSDESC_LD32_LO12_NC
), /* name */
1591 FALSE
, /* partial_inplace */
1592 0xffc, /* src_mask */
1593 0xffc, /* dst_mask */
1594 FALSE
), /* pcrel_offset */
1596 /* ADD: GOT offset G(S) & 0xfff. */
1597 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC
), /* type */
1599 2, /* size (0 = byte, 1 = short, 2 = long) */
1601 FALSE
, /* pc_relative */
1603 complain_overflow_dont
, /* complain_on_overflow */
1604 bfd_elf_generic_reloc
, /* special_function */
1605 AARCH64_R_STR (TLSDESC_ADD_LO12_NC
), /* name */
1606 FALSE
, /* partial_inplace */
1607 0xfff, /* src_mask */
1608 0xfff, /* dst_mask */
1609 FALSE
), /* pcrel_offset */
1611 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1
), /* type */
1612 16, /* rightshift */
1613 2, /* size (0 = byte, 1 = short, 2 = long) */
1615 FALSE
, /* pc_relative */
1617 complain_overflow_dont
, /* complain_on_overflow */
1618 bfd_elf_generic_reloc
, /* special_function */
1619 AARCH64_R_STR (TLSDESC_OFF_G1
), /* name */
1620 FALSE
, /* partial_inplace */
1621 0xffff, /* src_mask */
1622 0xffff, /* dst_mask */
1623 FALSE
), /* pcrel_offset */
1625 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC
), /* type */
1627 2, /* size (0 = byte, 1 = short, 2 = long) */
1629 FALSE
, /* pc_relative */
1631 complain_overflow_dont
, /* complain_on_overflow */
1632 bfd_elf_generic_reloc
, /* special_function */
1633 AARCH64_R_STR (TLSDESC_OFF_G0_NC
), /* name */
1634 FALSE
, /* partial_inplace */
1635 0xffff, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE
), /* pcrel_offset */
1639 HOWTO64 (AARCH64_R (TLSDESC_LDR
), /* type */
1641 2, /* size (0 = byte, 1 = short, 2 = long) */
1643 FALSE
, /* pc_relative */
1645 complain_overflow_dont
, /* complain_on_overflow */
1646 bfd_elf_generic_reloc
, /* special_function */
1647 AARCH64_R_STR (TLSDESC_LDR
), /* name */
1648 FALSE
, /* partial_inplace */
1651 FALSE
), /* pcrel_offset */
1653 HOWTO64 (AARCH64_R (TLSDESC_ADD
), /* type */
1655 2, /* size (0 = byte, 1 = short, 2 = long) */
1657 FALSE
, /* pc_relative */
1659 complain_overflow_dont
, /* complain_on_overflow */
1660 bfd_elf_generic_reloc
, /* special_function */
1661 AARCH64_R_STR (TLSDESC_ADD
), /* name */
1662 FALSE
, /* partial_inplace */
1665 FALSE
), /* pcrel_offset */
1667 HOWTO (AARCH64_R (TLSDESC_CALL
), /* type */
1669 2, /* size (0 = byte, 1 = short, 2 = long) */
1671 FALSE
, /* pc_relative */
1673 complain_overflow_dont
, /* complain_on_overflow */
1674 bfd_elf_generic_reloc
, /* special_function */
1675 AARCH64_R_STR (TLSDESC_CALL
), /* name */
1676 FALSE
, /* partial_inplace */
1679 FALSE
), /* pcrel_offset */
1681 HOWTO (AARCH64_R (COPY
), /* type */
1683 2, /* size (0 = byte, 1 = short, 2 = long) */
1685 FALSE
, /* pc_relative */
1687 complain_overflow_bitfield
, /* complain_on_overflow */
1688 bfd_elf_generic_reloc
, /* special_function */
1689 AARCH64_R_STR (COPY
), /* name */
1690 TRUE
, /* partial_inplace */
1691 0xffffffff, /* src_mask */
1692 0xffffffff, /* dst_mask */
1693 FALSE
), /* pcrel_offset */
1695 HOWTO (AARCH64_R (GLOB_DAT
), /* type */
1697 2, /* size (0 = byte, 1 = short, 2 = long) */
1699 FALSE
, /* pc_relative */
1701 complain_overflow_bitfield
, /* complain_on_overflow */
1702 bfd_elf_generic_reloc
, /* special_function */
1703 AARCH64_R_STR (GLOB_DAT
), /* name */
1704 TRUE
, /* partial_inplace */
1705 0xffffffff, /* src_mask */
1706 0xffffffff, /* dst_mask */
1707 FALSE
), /* pcrel_offset */
1709 HOWTO (AARCH64_R (JUMP_SLOT
), /* type */
1711 2, /* size (0 = byte, 1 = short, 2 = long) */
1713 FALSE
, /* pc_relative */
1715 complain_overflow_bitfield
, /* complain_on_overflow */
1716 bfd_elf_generic_reloc
, /* special_function */
1717 AARCH64_R_STR (JUMP_SLOT
), /* name */
1718 TRUE
, /* partial_inplace */
1719 0xffffffff, /* src_mask */
1720 0xffffffff, /* dst_mask */
1721 FALSE
), /* pcrel_offset */
1723 HOWTO (AARCH64_R (RELATIVE
), /* type */
1725 2, /* size (0 = byte, 1 = short, 2 = long) */
1727 FALSE
, /* pc_relative */
1729 complain_overflow_bitfield
, /* complain_on_overflow */
1730 bfd_elf_generic_reloc
, /* special_function */
1731 AARCH64_R_STR (RELATIVE
), /* name */
1732 TRUE
, /* partial_inplace */
1733 ALL_ONES
, /* src_mask */
1734 ALL_ONES
, /* dst_mask */
1735 FALSE
), /* pcrel_offset */
1737 HOWTO (AARCH64_R (TLS_DTPMOD
), /* type */
1739 2, /* size (0 = byte, 1 = short, 2 = long) */
1741 FALSE
, /* pc_relative */
1743 complain_overflow_dont
, /* complain_on_overflow */
1744 bfd_elf_generic_reloc
, /* special_function */
1746 AARCH64_R_STR (TLS_DTPMOD64
), /* name */
1748 AARCH64_R_STR (TLS_DTPMOD
), /* name */
1750 FALSE
, /* partial_inplace */
1752 ALL_ONES
, /* dst_mask */
1753 FALSE
), /* pc_reloffset */
1755 HOWTO (AARCH64_R (TLS_DTPREL
), /* type */
1757 2, /* size (0 = byte, 1 = short, 2 = long) */
1759 FALSE
, /* pc_relative */
1761 complain_overflow_dont
, /* complain_on_overflow */
1762 bfd_elf_generic_reloc
, /* special_function */
1764 AARCH64_R_STR (TLS_DTPREL64
), /* name */
1766 AARCH64_R_STR (TLS_DTPREL
), /* name */
1768 FALSE
, /* partial_inplace */
1770 ALL_ONES
, /* dst_mask */
1771 FALSE
), /* pcrel_offset */
1773 HOWTO (AARCH64_R (TLS_TPREL
), /* type */
1775 2, /* size (0 = byte, 1 = short, 2 = long) */
1777 FALSE
, /* pc_relative */
1779 complain_overflow_dont
, /* complain_on_overflow */
1780 bfd_elf_generic_reloc
, /* special_function */
1782 AARCH64_R_STR (TLS_TPREL64
), /* name */
1784 AARCH64_R_STR (TLS_TPREL
), /* name */
1786 FALSE
, /* partial_inplace */
1788 ALL_ONES
, /* dst_mask */
1789 FALSE
), /* pcrel_offset */
1791 HOWTO (AARCH64_R (TLSDESC
), /* type */
1793 2, /* size (0 = byte, 1 = short, 2 = long) */
1795 FALSE
, /* pc_relative */
1797 complain_overflow_dont
, /* complain_on_overflow */
1798 bfd_elf_generic_reloc
, /* special_function */
1799 AARCH64_R_STR (TLSDESC
), /* name */
1800 FALSE
, /* partial_inplace */
1802 ALL_ONES
, /* dst_mask */
1803 FALSE
), /* pcrel_offset */
1805 HOWTO (AARCH64_R (IRELATIVE
), /* type */
1807 2, /* size (0 = byte, 1 = short, 2 = long) */
1809 FALSE
, /* pc_relative */
1811 complain_overflow_bitfield
, /* complain_on_overflow */
1812 bfd_elf_generic_reloc
, /* special_function */
1813 AARCH64_R_STR (IRELATIVE
), /* name */
1814 FALSE
, /* partial_inplace */
1816 ALL_ONES
, /* dst_mask */
1817 FALSE
), /* pcrel_offset */
1822 static reloc_howto_type elfNN_aarch64_howto_none
=
1823 HOWTO (R_AARCH64_NONE
, /* type */
1825 3, /* size (0 = byte, 1 = short, 2 = long) */
1827 FALSE
, /* pc_relative */
1829 complain_overflow_dont
,/* complain_on_overflow */
1830 bfd_elf_generic_reloc
, /* special_function */
1831 "R_AARCH64_NONE", /* name */
1832 FALSE
, /* partial_inplace */
1835 FALSE
); /* pcrel_offset */
1837 /* Given HOWTO, return the bfd internal relocation enumerator. */
1839 static bfd_reloc_code_real_type
1840 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type
*howto
)
1843 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table
);
1844 const ptrdiff_t offset
1845 = howto
- elfNN_aarch64_howto_table
;
1847 if (offset
> 0 && offset
< size
- 1)
1848 return BFD_RELOC_AARCH64_RELOC_START
+ offset
;
1850 if (howto
== &elfNN_aarch64_howto_none
)
1851 return BFD_RELOC_AARCH64_NONE
;
1853 return BFD_RELOC_AARCH64_RELOC_START
;
1856 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1858 static bfd_reloc_code_real_type
1859 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type
)
1861 static bfd_boolean initialized_p
= FALSE
;
1862 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1863 static unsigned int offsets
[R_AARCH64_end
];
1865 if (initialized_p
== FALSE
)
1869 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
1870 if (elfNN_aarch64_howto_table
[i
].type
!= 0)
1871 offsets
[elfNN_aarch64_howto_table
[i
].type
] = i
;
1873 initialized_p
= TRUE
;
1876 if (r_type
== R_AARCH64_NONE
|| r_type
== R_AARCH64_NULL
)
1877 return BFD_RELOC_AARCH64_NONE
;
1879 /* PR 17512: file: b371e70a. */
1880 if (r_type
>= R_AARCH64_end
)
1882 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type
);
1883 bfd_set_error (bfd_error_bad_value
);
1884 return BFD_RELOC_AARCH64_NONE
;
1887 return BFD_RELOC_AARCH64_RELOC_START
+ offsets
[r_type
];
1890 struct elf_aarch64_reloc_map
1892 bfd_reloc_code_real_type from
;
1893 bfd_reloc_code_real_type to
;
1896 /* Map bfd generic reloc to AArch64-specific reloc. */
1897 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map
[] =
1899 {BFD_RELOC_NONE
, BFD_RELOC_AARCH64_NONE
},
1901 /* Basic data relocations. */
1902 {BFD_RELOC_CTOR
, BFD_RELOC_AARCH64_NN
},
1903 {BFD_RELOC_64
, BFD_RELOC_AARCH64_64
},
1904 {BFD_RELOC_32
, BFD_RELOC_AARCH64_32
},
1905 {BFD_RELOC_16
, BFD_RELOC_AARCH64_16
},
1906 {BFD_RELOC_64_PCREL
, BFD_RELOC_AARCH64_64_PCREL
},
1907 {BFD_RELOC_32_PCREL
, BFD_RELOC_AARCH64_32_PCREL
},
1908 {BFD_RELOC_16_PCREL
, BFD_RELOC_AARCH64_16_PCREL
},
1911 /* Given the bfd internal relocation enumerator in CODE, return the
1912 corresponding howto entry. */
1914 static reloc_howto_type
*
1915 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code
)
1919 /* Convert bfd generic reloc to AArch64-specific reloc. */
1920 if (code
< BFD_RELOC_AARCH64_RELOC_START
1921 || code
> BFD_RELOC_AARCH64_RELOC_END
)
1922 for (i
= 0; i
< ARRAY_SIZE (elf_aarch64_reloc_map
); i
++)
1923 if (elf_aarch64_reloc_map
[i
].from
== code
)
1925 code
= elf_aarch64_reloc_map
[i
].to
;
1929 if (code
> BFD_RELOC_AARCH64_RELOC_START
1930 && code
< BFD_RELOC_AARCH64_RELOC_END
)
1931 if (elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
].type
)
1932 return &elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
];
1934 if (code
== BFD_RELOC_AARCH64_NONE
)
1935 return &elfNN_aarch64_howto_none
;
1940 static reloc_howto_type
*
1941 elfNN_aarch64_howto_from_type (unsigned int r_type
)
1943 bfd_reloc_code_real_type val
;
1944 reloc_howto_type
*howto
;
1949 bfd_set_error (bfd_error_bad_value
);
1954 if (r_type
== R_AARCH64_NONE
)
1955 return &elfNN_aarch64_howto_none
;
1957 val
= elfNN_aarch64_bfd_reloc_from_type (r_type
);
1958 howto
= elfNN_aarch64_howto_from_bfd_reloc (val
);
1963 bfd_set_error (bfd_error_bad_value
);
1968 elfNN_aarch64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*bfd_reloc
,
1969 Elf_Internal_Rela
*elf_reloc
)
1971 unsigned int r_type
;
1973 r_type
= ELFNN_R_TYPE (elf_reloc
->r_info
);
1974 bfd_reloc
->howto
= elfNN_aarch64_howto_from_type (r_type
);
1977 static reloc_howto_type
*
1978 elfNN_aarch64_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1979 bfd_reloc_code_real_type code
)
1981 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (code
);
1986 bfd_set_error (bfd_error_bad_value
);
1990 static reloc_howto_type
*
1991 elfNN_aarch64_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1996 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
1997 if (elfNN_aarch64_howto_table
[i
].name
!= NULL
1998 && strcasecmp (elfNN_aarch64_howto_table
[i
].name
, r_name
) == 0)
1999 return &elfNN_aarch64_howto_table
[i
];
2004 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
2005 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
2006 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
2007 #define TARGET_BIG_NAME "elfNN-bigaarch64"
2009 /* The linker script knows the section names for placement.
2010 The entry_names are used to do simple name mangling on the stubs.
2011 Given a function name, and its type, the stub can be found. The
2012 name can be changed. The only requirement is the %s be present. */
2013 #define STUB_ENTRY_NAME "__%s_veneer"
2015 /* The name of the dynamic interpreter. This is put in the .interp
2017 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
2019 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
2020 (((1 << 25) - 1) << 2)
2021 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
2024 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
2025 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
2028 aarch64_valid_for_adrp_p (bfd_vma value
, bfd_vma place
)
2030 bfd_signed_vma offset
= (bfd_signed_vma
) (PG (value
) - PG (place
)) >> 12;
2031 return offset
<= AARCH64_MAX_ADRP_IMM
&& offset
>= AARCH64_MIN_ADRP_IMM
;
2035 aarch64_valid_branch_p (bfd_vma value
, bfd_vma place
)
2037 bfd_signed_vma offset
= (bfd_signed_vma
) (value
- place
);
2038 return (offset
<= AARCH64_MAX_FWD_BRANCH_OFFSET
2039 && offset
>= AARCH64_MAX_BWD_BRANCH_OFFSET
);
2042 static const uint32_t aarch64_adrp_branch_stub
[] =
2044 0x90000010, /* adrp ip0, X */
2045 /* R_AARCH64_ADR_HI21_PCREL(X) */
2046 0x91000210, /* add ip0, ip0, :lo12:X */
2047 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
2048 0xd61f0200, /* br ip0 */
2051 static const uint32_t aarch64_long_branch_stub
[] =
2054 0x58000090, /* ldr ip0, 1f */
2056 0x18000090, /* ldr wip0, 1f */
2058 0x10000011, /* adr ip1, #0 */
2059 0x8b110210, /* add ip0, ip0, ip1 */
2060 0xd61f0200, /* br ip0 */
2061 0x00000000, /* 1: .xword or .word
2062 R_AARCH64_PRELNN(X) + 12
2067 static const uint32_t aarch64_erratum_835769_stub
[] =
2069 0x00000000, /* Placeholder for multiply accumulate. */
2070 0x14000000, /* b <label> */
2073 static const uint32_t aarch64_erratum_843419_stub
[] =
2075 0x00000000, /* Placeholder for LDR instruction. */
2076 0x14000000, /* b <label> */
2079 /* Section name for stubs is the associated section name plus this
2081 #define STUB_SUFFIX ".stub"
2083 enum elf_aarch64_stub_type
2086 aarch64_stub_adrp_branch
,
2087 aarch64_stub_long_branch
,
2088 aarch64_stub_erratum_835769_veneer
,
2089 aarch64_stub_erratum_843419_veneer
,
2092 struct elf_aarch64_stub_hash_entry
2094 /* Base hash table entry structure. */
2095 struct bfd_hash_entry root
;
2097 /* The stub section. */
2100 /* Offset within stub_sec of the beginning of this stub. */
2101 bfd_vma stub_offset
;
2103 /* Given the symbol's value and its section we can determine its final
2104 value when building the stubs (so the stub knows where to jump). */
2105 bfd_vma target_value
;
2106 asection
*target_section
;
2108 enum elf_aarch64_stub_type stub_type
;
2110 /* The symbol table entry, if any, that this was derived from. */
2111 struct elf_aarch64_link_hash_entry
*h
;
2113 /* Destination symbol type */
2114 unsigned char st_type
;
2116 /* Where this stub is being called from, or, in the case of combined
2117 stub sections, the first input section in the group. */
2120 /* The name for the local symbol at the start of this stub. The
2121 stub name in the hash table has to be unique; this does not, so
2122 it can be friendlier. */
2125 /* The instruction which caused this stub to be generated (only valid for
2126 erratum 835769 workaround stubs at present). */
2127 uint32_t veneered_insn
;
2129 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2130 bfd_vma adrp_offset
;
2133 /* Used to build a map of a section. This is required for mixed-endian
2136 typedef struct elf_elf_section_map
2141 elf_aarch64_section_map
;
2144 typedef struct _aarch64_elf_section_data
2146 struct bfd_elf_section_data elf
;
2147 unsigned int mapcount
;
2148 unsigned int mapsize
;
2149 elf_aarch64_section_map
*map
;
2151 _aarch64_elf_section_data
;
2153 #define elf_aarch64_section_data(sec) \
2154 ((_aarch64_elf_section_data *) elf_section_data (sec))
2156 /* The size of the thread control block which is defined to be two pointers. */
2157 #define TCB_SIZE (ARCH_SIZE/8)*2
2159 struct elf_aarch64_local_symbol
2161 unsigned int got_type
;
2162 bfd_signed_vma got_refcount
;
2165 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
2166 offset is from the end of the jump table and reserved entries
2169 The magic value (bfd_vma) -1 indicates that an offset has not be
2171 bfd_vma tlsdesc_got_jump_table_offset
;
2174 struct elf_aarch64_obj_tdata
2176 struct elf_obj_tdata root
;
2178 /* local symbol descriptors */
2179 struct elf_aarch64_local_symbol
*locals
;
2181 /* Zero to warn when linking objects with incompatible enum sizes. */
2182 int no_enum_size_warning
;
2184 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2185 int no_wchar_size_warning
;
2188 #define elf_aarch64_tdata(bfd) \
2189 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2191 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2193 #define is_aarch64_elf(bfd) \
2194 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2195 && elf_tdata (bfd) != NULL \
2196 && elf_object_id (bfd) == AARCH64_ELF_DATA)
2199 elfNN_aarch64_mkobject (bfd
*abfd
)
2201 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_aarch64_obj_tdata
),
2205 #define elf_aarch64_hash_entry(ent) \
2206 ((struct elf_aarch64_link_hash_entry *)(ent))
2208 #define GOT_UNKNOWN 0
2209 #define GOT_NORMAL 1
2210 #define GOT_TLS_GD 2
2211 #define GOT_TLS_IE 4
2212 #define GOT_TLSDESC_GD 8
2214 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2216 /* AArch64 ELF linker hash entry. */
2217 struct elf_aarch64_link_hash_entry
2219 struct elf_link_hash_entry root
;
2221 /* Track dynamic relocs copied for this symbol. */
2222 struct elf_dyn_relocs
*dyn_relocs
;
2224 /* Since PLT entries have variable size, we need to record the
2225 index into .got.plt instead of recomputing it from the PLT
2227 bfd_signed_vma plt_got_offset
;
2229 /* Bit mask representing the type of GOT entry(s) if any required by
2231 unsigned int got_type
;
2233 /* A pointer to the most recently used stub hash entry against this
2235 struct elf_aarch64_stub_hash_entry
*stub_cache
;
2237 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
2238 is from the end of the jump table and reserved entries within the PLTGOT.
2240 The magic value (bfd_vma) -1 indicates that an offset has not
2242 bfd_vma tlsdesc_got_jump_table_offset
;
2246 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry
*h
,
2248 unsigned long r_symndx
)
2251 return elf_aarch64_hash_entry (h
)->got_type
;
2253 if (! elf_aarch64_locals (abfd
))
2256 return elf_aarch64_locals (abfd
)[r_symndx
].got_type
;
2259 /* Get the AArch64 elf linker hash table from a link_info structure. */
2260 #define elf_aarch64_hash_table(info) \
2261 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
2263 #define aarch64_stub_hash_lookup(table, string, create, copy) \
2264 ((struct elf_aarch64_stub_hash_entry *) \
2265 bfd_hash_lookup ((table), (string), (create), (copy)))
2267 /* AArch64 ELF linker hash table. */
2268 struct elf_aarch64_link_hash_table
2270 /* The main hash table. */
2271 struct elf_link_hash_table root
;
2273 /* Nonzero to force PIC branch veneers. */
2276 /* Fix erratum 835769. */
2277 int fix_erratum_835769
;
2279 /* Fix erratum 843419. */
2280 int fix_erratum_843419
;
2282 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
2283 int fix_erratum_843419_adr
;
2285 /* The number of bytes in the initial entry in the PLT. */
2286 bfd_size_type plt_header_size
;
2288 /* The number of bytes in the subsequent PLT etries. */
2289 bfd_size_type plt_entry_size
;
2291 /* Short-cuts to get to dynamic linker sections. */
2295 /* Small local sym cache. */
2296 struct sym_cache sym_cache
;
2298 /* For convenience in allocate_dynrelocs. */
2301 /* The amount of space used by the reserved portion of the sgotplt
2302 section, plus whatever space is used by the jump slots. */
2303 bfd_vma sgotplt_jump_table_size
;
2305 /* The stub hash table. */
2306 struct bfd_hash_table stub_hash_table
;
2308 /* Linker stub bfd. */
2311 /* Linker call-backs. */
2312 asection
*(*add_stub_section
) (const char *, asection
*);
2313 void (*layout_sections_again
) (void);
2315 /* Array to keep track of which stub sections have been created, and
2316 information on stub grouping. */
2319 /* This is the section to which stubs in the group will be
2322 /* The stub section. */
2326 /* Assorted information used by elfNN_aarch64_size_stubs. */
2327 unsigned int bfd_count
;
2328 unsigned int top_index
;
2329 asection
**input_list
;
2331 /* The offset into splt of the PLT entry for the TLS descriptor
2332 resolver. Special values are 0, if not necessary (or not found
2333 to be necessary yet), and -1 if needed but not determined
2335 bfd_vma tlsdesc_plt
;
2337 /* The GOT offset for the lazy trampoline. Communicated to the
2338 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
2339 indicates an offset is not allocated. */
2340 bfd_vma dt_tlsdesc_got
;
2342 /* Used by local STT_GNU_IFUNC symbols. */
2343 htab_t loc_hash_table
;
2344 void * loc_hash_memory
;
2347 /* Create an entry in an AArch64 ELF linker hash table. */
2349 static struct bfd_hash_entry
*
2350 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
2351 struct bfd_hash_table
*table
,
2354 struct elf_aarch64_link_hash_entry
*ret
=
2355 (struct elf_aarch64_link_hash_entry
*) entry
;
2357 /* Allocate the structure if it has not already been allocated by a
2360 ret
= bfd_hash_allocate (table
,
2361 sizeof (struct elf_aarch64_link_hash_entry
));
2363 return (struct bfd_hash_entry
*) ret
;
2365 /* Call the allocation method of the superclass. */
2366 ret
= ((struct elf_aarch64_link_hash_entry
*)
2367 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2371 ret
->dyn_relocs
= NULL
;
2372 ret
->got_type
= GOT_UNKNOWN
;
2373 ret
->plt_got_offset
= (bfd_vma
) - 1;
2374 ret
->stub_cache
= NULL
;
2375 ret
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
2378 return (struct bfd_hash_entry
*) ret
;
2381 /* Initialize an entry in the stub hash table. */
2383 static struct bfd_hash_entry
*
2384 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2385 struct bfd_hash_table
*table
, const char *string
)
2387 /* Allocate the structure if it has not already been allocated by a
2391 entry
= bfd_hash_allocate (table
,
2393 elf_aarch64_stub_hash_entry
));
2398 /* Call the allocation method of the superclass. */
2399 entry
= bfd_hash_newfunc (entry
, table
, string
);
2402 struct elf_aarch64_stub_hash_entry
*eh
;
2404 /* Initialize the local fields. */
2405 eh
= (struct elf_aarch64_stub_hash_entry
*) entry
;
2406 eh
->adrp_offset
= 0;
2407 eh
->stub_sec
= NULL
;
2408 eh
->stub_offset
= 0;
2409 eh
->target_value
= 0;
2410 eh
->target_section
= NULL
;
2411 eh
->stub_type
= aarch64_stub_none
;
2419 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2420 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2421 as global symbol. We reuse indx and dynstr_index for local symbol
2422 hash since they aren't used by global symbols in this backend. */
2425 elfNN_aarch64_local_htab_hash (const void *ptr
)
2427 struct elf_link_hash_entry
*h
2428 = (struct elf_link_hash_entry
*) ptr
;
2429 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
2432 /* Compare local hash entries. */
2435 elfNN_aarch64_local_htab_eq (const void *ptr1
, const void *ptr2
)
2437 struct elf_link_hash_entry
*h1
2438 = (struct elf_link_hash_entry
*) ptr1
;
2439 struct elf_link_hash_entry
*h2
2440 = (struct elf_link_hash_entry
*) ptr2
;
2442 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
2445 /* Find and/or create a hash entry for local symbol. */
2447 static struct elf_link_hash_entry
*
2448 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table
*htab
,
2449 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
2452 struct elf_aarch64_link_hash_entry e
, *ret
;
2453 asection
*sec
= abfd
->sections
;
2454 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
2455 ELFNN_R_SYM (rel
->r_info
));
2458 e
.root
.indx
= sec
->id
;
2459 e
.root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2460 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
2461 create
? INSERT
: NO_INSERT
);
2468 ret
= (struct elf_aarch64_link_hash_entry
*) *slot
;
2472 ret
= (struct elf_aarch64_link_hash_entry
*)
2473 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
2474 sizeof (struct elf_aarch64_link_hash_entry
));
2477 memset (ret
, 0, sizeof (*ret
));
2478 ret
->root
.indx
= sec
->id
;
2479 ret
->root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2480 ret
->root
.dynindx
= -1;
2486 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2489 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info
*info
,
2490 struct elf_link_hash_entry
*dir
,
2491 struct elf_link_hash_entry
*ind
)
2493 struct elf_aarch64_link_hash_entry
*edir
, *eind
;
2495 edir
= (struct elf_aarch64_link_hash_entry
*) dir
;
2496 eind
= (struct elf_aarch64_link_hash_entry
*) ind
;
2498 if (eind
->dyn_relocs
!= NULL
)
2500 if (edir
->dyn_relocs
!= NULL
)
2502 struct elf_dyn_relocs
**pp
;
2503 struct elf_dyn_relocs
*p
;
2505 /* Add reloc counts against the indirect sym to the direct sym
2506 list. Merge any entries against the same section. */
2507 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
;)
2509 struct elf_dyn_relocs
*q
;
2511 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2512 if (q
->sec
== p
->sec
)
2514 q
->pc_count
+= p
->pc_count
;
2515 q
->count
+= p
->count
;
2522 *pp
= edir
->dyn_relocs
;
2525 edir
->dyn_relocs
= eind
->dyn_relocs
;
2526 eind
->dyn_relocs
= NULL
;
2529 if (ind
->root
.type
== bfd_link_hash_indirect
)
2531 /* Copy over PLT info. */
2532 if (dir
->got
.refcount
<= 0)
2534 edir
->got_type
= eind
->got_type
;
2535 eind
->got_type
= GOT_UNKNOWN
;
2539 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2542 /* Destroy an AArch64 elf linker hash table. */
2545 elfNN_aarch64_link_hash_table_free (bfd
*obfd
)
2547 struct elf_aarch64_link_hash_table
*ret
2548 = (struct elf_aarch64_link_hash_table
*) obfd
->link
.hash
;
2550 if (ret
->loc_hash_table
)
2551 htab_delete (ret
->loc_hash_table
);
2552 if (ret
->loc_hash_memory
)
2553 objalloc_free ((struct objalloc
*) ret
->loc_hash_memory
);
2555 bfd_hash_table_free (&ret
->stub_hash_table
);
2556 _bfd_elf_link_hash_table_free (obfd
);
2559 /* Create an AArch64 elf linker hash table. */
2561 static struct bfd_link_hash_table
*
2562 elfNN_aarch64_link_hash_table_create (bfd
*abfd
)
2564 struct elf_aarch64_link_hash_table
*ret
;
2565 bfd_size_type amt
= sizeof (struct elf_aarch64_link_hash_table
);
2567 ret
= bfd_zmalloc (amt
);
2571 if (!_bfd_elf_link_hash_table_init
2572 (&ret
->root
, abfd
, elfNN_aarch64_link_hash_newfunc
,
2573 sizeof (struct elf_aarch64_link_hash_entry
), AARCH64_ELF_DATA
))
2579 ret
->plt_header_size
= PLT_ENTRY_SIZE
;
2580 ret
->plt_entry_size
= PLT_SMALL_ENTRY_SIZE
;
2582 ret
->dt_tlsdesc_got
= (bfd_vma
) - 1;
2584 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2585 sizeof (struct elf_aarch64_stub_hash_entry
)))
2587 _bfd_elf_link_hash_table_free (abfd
);
2591 ret
->loc_hash_table
= htab_try_create (1024,
2592 elfNN_aarch64_local_htab_hash
,
2593 elfNN_aarch64_local_htab_eq
,
2595 ret
->loc_hash_memory
= objalloc_create ();
2596 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
2598 elfNN_aarch64_link_hash_table_free (abfd
);
2601 ret
->root
.root
.hash_table_free
= elfNN_aarch64_link_hash_table_free
;
2603 return &ret
->root
.root
;
2607 aarch64_relocate (unsigned int r_type
, bfd
*input_bfd
, asection
*input_section
,
2608 bfd_vma offset
, bfd_vma value
)
2610 reloc_howto_type
*howto
;
2613 howto
= elfNN_aarch64_howto_from_type (r_type
);
2614 place
= (input_section
->output_section
->vma
+ input_section
->output_offset
2617 r_type
= elfNN_aarch64_bfd_reloc_from_type (r_type
);
2618 value
= _bfd_aarch64_elf_resolve_relocation (r_type
, place
, value
, 0, FALSE
);
2619 return _bfd_aarch64_elf_put_addend (input_bfd
,
2620 input_section
->contents
+ offset
, r_type
,
2624 static enum elf_aarch64_stub_type
2625 aarch64_select_branch_stub (bfd_vma value
, bfd_vma place
)
2627 if (aarch64_valid_for_adrp_p (value
, place
))
2628 return aarch64_stub_adrp_branch
;
2629 return aarch64_stub_long_branch
;
2632 /* Determine the type of stub needed, if any, for a call. */
2634 static enum elf_aarch64_stub_type
2635 aarch64_type_of_stub (struct bfd_link_info
*info
,
2636 asection
*input_sec
,
2637 const Elf_Internal_Rela
*rel
,
2639 unsigned char st_type
,
2640 struct elf_aarch64_link_hash_entry
*hash
,
2641 bfd_vma destination
)
2644 bfd_signed_vma branch_offset
;
2645 unsigned int r_type
;
2646 struct elf_aarch64_link_hash_table
*globals
;
2647 enum elf_aarch64_stub_type stub_type
= aarch64_stub_none
;
2648 bfd_boolean via_plt_p
;
2650 if (st_type
!= STT_FUNC
2651 && (sym_sec
!= bfd_abs_section_ptr
))
2654 globals
= elf_aarch64_hash_table (info
);
2655 via_plt_p
= (globals
->root
.splt
!= NULL
&& hash
!= NULL
2656 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1);
2657 /* Make sure call to plt stub can fit into the branch range. */
2659 destination
= (globals
->root
.splt
->output_section
->vma
2660 + globals
->root
.splt
->output_offset
2661 + hash
->root
.plt
.offset
);
2663 /* Determine where the call point is. */
2664 location
= (input_sec
->output_offset
2665 + input_sec
->output_section
->vma
+ rel
->r_offset
);
2667 branch_offset
= (bfd_signed_vma
) (destination
- location
);
2669 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2671 /* We don't want to redirect any old unconditional jump in this way,
2672 only one which is being used for a sibcall, where it is
2673 acceptable for the IP0 and IP1 registers to be clobbered. */
2674 if ((r_type
== AARCH64_R (CALL26
) || r_type
== AARCH64_R (JUMP26
))
2675 && (branch_offset
> AARCH64_MAX_FWD_BRANCH_OFFSET
2676 || branch_offset
< AARCH64_MAX_BWD_BRANCH_OFFSET
))
2678 stub_type
= aarch64_stub_long_branch
;
2684 /* Build a name for an entry in the stub hash table. */
2687 elfNN_aarch64_stub_name (const asection
*input_section
,
2688 const asection
*sym_sec
,
2689 const struct elf_aarch64_link_hash_entry
*hash
,
2690 const Elf_Internal_Rela
*rel
)
2697 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 16 + 1;
2698 stub_name
= bfd_malloc (len
);
2699 if (stub_name
!= NULL
)
2700 snprintf (stub_name
, len
, "%08x_%s+%" BFD_VMA_FMT
"x",
2701 (unsigned int) input_section
->id
,
2702 hash
->root
.root
.root
.string
,
2707 len
= 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2708 stub_name
= bfd_malloc (len
);
2709 if (stub_name
!= NULL
)
2710 snprintf (stub_name
, len
, "%08x_%x:%x+%" BFD_VMA_FMT
"x",
2711 (unsigned int) input_section
->id
,
2712 (unsigned int) sym_sec
->id
,
2713 (unsigned int) ELFNN_R_SYM (rel
->r_info
),
2720 /* Look up an entry in the stub hash. Stub entries are cached because
2721 creating the stub name takes a bit of time. */
2723 static struct elf_aarch64_stub_hash_entry
*
2724 elfNN_aarch64_get_stub_entry (const asection
*input_section
,
2725 const asection
*sym_sec
,
2726 struct elf_link_hash_entry
*hash
,
2727 const Elf_Internal_Rela
*rel
,
2728 struct elf_aarch64_link_hash_table
*htab
)
2730 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2731 struct elf_aarch64_link_hash_entry
*h
=
2732 (struct elf_aarch64_link_hash_entry
*) hash
;
2733 const asection
*id_sec
;
2735 if ((input_section
->flags
& SEC_CODE
) == 0)
2738 /* If this input section is part of a group of sections sharing one
2739 stub section, then use the id of the first section in the group.
2740 Stub names need to include a section id, as there may well be
2741 more than one stub used to reach say, printf, and we need to
2742 distinguish between them. */
2743 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
2745 if (h
!= NULL
&& h
->stub_cache
!= NULL
2746 && h
->stub_cache
->h
== h
&& h
->stub_cache
->id_sec
== id_sec
)
2748 stub_entry
= h
->stub_cache
;
2754 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, h
, rel
);
2755 if (stub_name
== NULL
)
2758 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
2759 stub_name
, FALSE
, FALSE
);
2761 h
->stub_cache
= stub_entry
;
2770 /* Create a stub section. */
2773 _bfd_aarch64_create_stub_section (asection
*section
,
2774 struct elf_aarch64_link_hash_table
*htab
)
2780 namelen
= strlen (section
->name
);
2781 len
= namelen
+ sizeof (STUB_SUFFIX
);
2782 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
2786 memcpy (s_name
, section
->name
, namelen
);
2787 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
2788 return (*htab
->add_stub_section
) (s_name
, section
);
2792 /* Find or create a stub section for a link section.
2794 Fix or create the stub section used to collect stubs attached to
2795 the specified link section. */
2798 _bfd_aarch64_get_stub_for_link_section (asection
*link_section
,
2799 struct elf_aarch64_link_hash_table
*htab
)
2801 if (htab
->stub_group
[link_section
->id
].stub_sec
== NULL
)
2802 htab
->stub_group
[link_section
->id
].stub_sec
2803 = _bfd_aarch64_create_stub_section (link_section
, htab
);
2804 return htab
->stub_group
[link_section
->id
].stub_sec
;
2808 /* Find or create a stub section in the stub group for an input
2812 _bfd_aarch64_create_or_find_stub_sec (asection
*section
,
2813 struct elf_aarch64_link_hash_table
*htab
)
2815 asection
*link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2816 return _bfd_aarch64_get_stub_for_link_section (link_sec
, htab
);
2820 /* Add a new stub entry in the stub group associated with an input
2821 section to the stub hash. Not all fields of the new stub entry are
2824 static struct elf_aarch64_stub_hash_entry
*
2825 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name
,
2827 struct elf_aarch64_link_hash_table
*htab
)
2831 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2833 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2834 stub_sec
= _bfd_aarch64_create_or_find_stub_sec (section
, htab
);
2836 /* Enter this entry into the linker stub hash table. */
2837 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2839 if (stub_entry
== NULL
)
2841 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
2842 section
->owner
, stub_name
);
2846 stub_entry
->stub_sec
= stub_sec
;
2847 stub_entry
->stub_offset
= 0;
2848 stub_entry
->id_sec
= link_sec
;
2853 /* Add a new stub entry in the final stub section to the stub hash.
2854 Not all fields of the new stub entry are initialised. */
2856 static struct elf_aarch64_stub_hash_entry
*
2857 _bfd_aarch64_add_stub_entry_after (const char *stub_name
,
2858 asection
*link_section
,
2859 struct elf_aarch64_link_hash_table
*htab
)
2862 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2864 stub_sec
= _bfd_aarch64_get_stub_for_link_section (link_section
, htab
);
2865 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2867 if (stub_entry
== NULL
)
2869 (*_bfd_error_handler
) (_("cannot create stub entry %s"), stub_name
);
2873 stub_entry
->stub_sec
= stub_sec
;
2874 stub_entry
->stub_offset
= 0;
2875 stub_entry
->id_sec
= link_section
;
2882 aarch64_build_one_stub (struct bfd_hash_entry
*gen_entry
,
2883 void *in_arg ATTRIBUTE_UNUSED
)
2885 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2890 bfd_vma veneered_insn_loc
;
2891 bfd_vma veneer_entry_loc
;
2892 bfd_signed_vma branch_offset
= 0;
2893 unsigned int template_size
;
2894 const uint32_t *template;
2897 /* Massage our args to the form they really have. */
2898 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
2900 stub_sec
= stub_entry
->stub_sec
;
2902 /* Make a note of the offset within the stubs for this entry. */
2903 stub_entry
->stub_offset
= stub_sec
->size
;
2904 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
2906 stub_bfd
= stub_sec
->owner
;
2908 /* This is the address of the stub destination. */
2909 sym_value
= (stub_entry
->target_value
2910 + stub_entry
->target_section
->output_offset
2911 + stub_entry
->target_section
->output_section
->vma
);
2913 if (stub_entry
->stub_type
== aarch64_stub_long_branch
)
2915 bfd_vma place
= (stub_entry
->stub_offset
+ stub_sec
->output_section
->vma
2916 + stub_sec
->output_offset
);
2918 /* See if we can relax the stub. */
2919 if (aarch64_valid_for_adrp_p (sym_value
, place
))
2920 stub_entry
->stub_type
= aarch64_select_branch_stub (sym_value
, place
);
2923 switch (stub_entry
->stub_type
)
2925 case aarch64_stub_adrp_branch
:
2926 template = aarch64_adrp_branch_stub
;
2927 template_size
= sizeof (aarch64_adrp_branch_stub
);
2929 case aarch64_stub_long_branch
:
2930 template = aarch64_long_branch_stub
;
2931 template_size
= sizeof (aarch64_long_branch_stub
);
2933 case aarch64_stub_erratum_835769_veneer
:
2934 template = aarch64_erratum_835769_stub
;
2935 template_size
= sizeof (aarch64_erratum_835769_stub
);
2937 case aarch64_stub_erratum_843419_veneer
:
2938 template = aarch64_erratum_843419_stub
;
2939 template_size
= sizeof (aarch64_erratum_843419_stub
);
2945 for (i
= 0; i
< (template_size
/ sizeof template[0]); i
++)
2947 bfd_putl32 (template[i
], loc
);
2951 template_size
= (template_size
+ 7) & ~7;
2952 stub_sec
->size
+= template_size
;
2954 switch (stub_entry
->stub_type
)
2956 case aarch64_stub_adrp_branch
:
2957 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21
), stub_bfd
, stub_sec
,
2958 stub_entry
->stub_offset
, sym_value
))
2959 /* The stub would not have been relaxed if the offset was out
2963 if (aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC
), stub_bfd
, stub_sec
,
2964 stub_entry
->stub_offset
+ 4, sym_value
))
2968 case aarch64_stub_long_branch
:
2969 /* We want the value relative to the address 12 bytes back from the
2971 if (aarch64_relocate (AARCH64_R (PRELNN
), stub_bfd
, stub_sec
,
2972 stub_entry
->stub_offset
+ 16, sym_value
+ 12))
2976 case aarch64_stub_erratum_835769_veneer
:
2977 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
2978 + stub_entry
->target_section
->output_offset
2979 + stub_entry
->target_value
;
2980 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
2981 + stub_entry
->stub_sec
->output_offset
2982 + stub_entry
->stub_offset
;
2983 branch_offset
= veneered_insn_loc
- veneer_entry_loc
;
2984 branch_offset
>>= 2;
2985 branch_offset
&= 0x3ffffff;
2986 bfd_putl32 (stub_entry
->veneered_insn
,
2987 stub_sec
->contents
+ stub_entry
->stub_offset
);
2988 bfd_putl32 (template[1] | branch_offset
,
2989 stub_sec
->contents
+ stub_entry
->stub_offset
+ 4);
2992 case aarch64_stub_erratum_843419_veneer
:
2993 if (aarch64_relocate (AARCH64_R (JUMP26
), stub_bfd
, stub_sec
,
2994 stub_entry
->stub_offset
+ 4, sym_value
+ 4))
3005 /* As above, but don't actually build the stub. Just bump offset so
3006 we know stub section sizes. */
3009 aarch64_size_one_stub (struct bfd_hash_entry
*gen_entry
,
3010 void *in_arg ATTRIBUTE_UNUSED
)
3012 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3015 /* Massage our args to the form they really have. */
3016 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
3018 switch (stub_entry
->stub_type
)
3020 case aarch64_stub_adrp_branch
:
3021 size
= sizeof (aarch64_adrp_branch_stub
);
3023 case aarch64_stub_long_branch
:
3024 size
= sizeof (aarch64_long_branch_stub
);
3026 case aarch64_stub_erratum_835769_veneer
:
3027 size
= sizeof (aarch64_erratum_835769_stub
);
3029 case aarch64_stub_erratum_843419_veneer
:
3030 size
= sizeof (aarch64_erratum_843419_stub
);
3036 size
= (size
+ 7) & ~7;
3037 stub_entry
->stub_sec
->size
+= size
;
3041 /* External entry points for sizing and building linker stubs. */
3043 /* Set up various things so that we can make a list of input sections
3044 for each output section included in the link. Returns -1 on error,
3045 0 when no stubs will be needed, and 1 on success. */
3048 elfNN_aarch64_setup_section_lists (bfd
*output_bfd
,
3049 struct bfd_link_info
*info
)
3052 unsigned int bfd_count
;
3053 unsigned int top_id
, top_index
;
3055 asection
**input_list
, **list
;
3057 struct elf_aarch64_link_hash_table
*htab
=
3058 elf_aarch64_hash_table (info
);
3060 if (!is_elf_hash_table (htab
))
3063 /* Count the number of input BFDs and find the top input section id. */
3064 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3065 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3068 for (section
= input_bfd
->sections
;
3069 section
!= NULL
; section
= section
->next
)
3071 if (top_id
< section
->id
)
3072 top_id
= section
->id
;
3075 htab
->bfd_count
= bfd_count
;
3077 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3078 htab
->stub_group
= bfd_zmalloc (amt
);
3079 if (htab
->stub_group
== NULL
)
3082 /* We can't use output_bfd->section_count here to find the top output
3083 section index as some sections may have been removed, and
3084 _bfd_strip_section_from_output doesn't renumber the indices. */
3085 for (section
= output_bfd
->sections
, top_index
= 0;
3086 section
!= NULL
; section
= section
->next
)
3088 if (top_index
< section
->index
)
3089 top_index
= section
->index
;
3092 htab
->top_index
= top_index
;
3093 amt
= sizeof (asection
*) * (top_index
+ 1);
3094 input_list
= bfd_malloc (amt
);
3095 htab
->input_list
= input_list
;
3096 if (input_list
== NULL
)
3099 /* For sections we aren't interested in, mark their entries with a
3100 value we can check later. */
3101 list
= input_list
+ top_index
;
3103 *list
= bfd_abs_section_ptr
;
3104 while (list
-- != input_list
);
3106 for (section
= output_bfd
->sections
;
3107 section
!= NULL
; section
= section
->next
)
3109 if ((section
->flags
& SEC_CODE
) != 0)
3110 input_list
[section
->index
] = NULL
;
3116 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3117 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3119 /* The linker repeatedly calls this function for each input section,
3120 in the order that input sections are linked into output sections.
3121 Build lists of input sections to determine groupings between which
3122 we may insert linker stubs. */
3125 elfNN_aarch64_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3127 struct elf_aarch64_link_hash_table
*htab
=
3128 elf_aarch64_hash_table (info
);
3130 if (isec
->output_section
->index
<= htab
->top_index
)
3132 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3134 if (*list
!= bfd_abs_section_ptr
)
3136 /* Steal the link_sec pointer for our list. */
3137 /* This happens to make the list in reverse order,
3138 which is what we want. */
3139 PREV_SEC (isec
) = *list
;
3145 /* See whether we can group stub sections together. Grouping stub
3146 sections may result in fewer stubs. More importantly, we need to
3147 put all .init* and .fini* stubs at the beginning of the .init or
3148 .fini output sections respectively, because glibc splits the
3149 _init and _fini functions into multiple parts. Putting a stub in
3150 the middle of a function is not a good idea. */
3153 group_sections (struct elf_aarch64_link_hash_table
*htab
,
3154 bfd_size_type stub_group_size
,
3155 bfd_boolean stubs_always_before_branch
)
3157 asection
**list
= htab
->input_list
+ htab
->top_index
;
3161 asection
*tail
= *list
;
3163 if (tail
== bfd_abs_section_ptr
)
3166 while (tail
!= NULL
)
3170 bfd_size_type total
;
3174 while ((prev
= PREV_SEC (curr
)) != NULL
3175 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3179 /* OK, the size from the start of CURR to the end is less
3180 than stub_group_size and thus can be handled by one stub
3181 section. (Or the tail section is itself larger than
3182 stub_group_size, in which case we may be toast.)
3183 We should really be keeping track of the total size of
3184 stubs added here, as stubs contribute to the final output
3188 prev
= PREV_SEC (tail
);
3189 /* Set up this stub group. */
3190 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3192 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3194 /* But wait, there's more! Input sections up to stub_group_size
3195 bytes before the stub section can be handled by it too. */
3196 if (!stubs_always_before_branch
)
3200 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3204 prev
= PREV_SEC (tail
);
3205 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3211 while (list
-- != htab
->input_list
);
3213 free (htab
->input_list
);
3218 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3220 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
3221 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
3222 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
3223 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
3224 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
3225 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
3227 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
3228 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
3229 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
3230 #define AARCH64_ZR 0x1f
3232 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
3233 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
3235 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
3236 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
3237 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
3238 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
3239 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
3240 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
3241 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
3242 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
3243 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
3244 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
3245 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
3246 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
3247 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
3248 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
3249 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
3250 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
3251 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
3252 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
3254 /* Classify an INSN if it is indeed a load/store.
3256 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3258 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3261 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned.
3266 aarch64_mem_op_p (uint32_t insn
, unsigned int *rt
, unsigned int *rt2
,
3267 bfd_boolean
*pair
, bfd_boolean
*load
)
3275 /* Bail out quickly if INSN doesn't fall into the the load-store
3277 if (!AARCH64_LDST (insn
))
3282 if (AARCH64_LDST_EX (insn
))
3284 *rt
= AARCH64_RT (insn
);
3286 if (AARCH64_BIT (insn
, 21) == 1)
3289 *rt2
= AARCH64_RT2 (insn
);
3291 *load
= AARCH64_LD (insn
);
3294 else if (AARCH64_LDST_NAP (insn
)
3295 || AARCH64_LDSTP_PI (insn
)
3296 || AARCH64_LDSTP_O (insn
)
3297 || AARCH64_LDSTP_PRE (insn
))
3300 *rt
= AARCH64_RT (insn
);
3301 *rt2
= AARCH64_RT2 (insn
);
3302 *load
= AARCH64_LD (insn
);
3305 else if (AARCH64_LDST_PCREL (insn
)
3306 || AARCH64_LDST_UI (insn
)
3307 || AARCH64_LDST_PIIMM (insn
)
3308 || AARCH64_LDST_U (insn
)
3309 || AARCH64_LDST_PREIMM (insn
)
3310 || AARCH64_LDST_RO (insn
)
3311 || AARCH64_LDST_UIMM (insn
))
3313 *rt
= AARCH64_RT (insn
);
3315 if (AARCH64_LDST_PCREL (insn
))
3317 opc
= AARCH64_BITS (insn
, 22, 2);
3318 v
= AARCH64_BIT (insn
, 26);
3319 opc_v
= opc
| (v
<< 2);
3320 *load
= (opc_v
== 1 || opc_v
== 2 || opc_v
== 3
3321 || opc_v
== 5 || opc_v
== 7);
3324 else if (AARCH64_LDST_SIMD_M (insn
)
3325 || AARCH64_LDST_SIMD_M_PI (insn
))
3327 *rt
= AARCH64_RT (insn
);
3328 *load
= AARCH64_BIT (insn
, 22);
3329 opcode
= (insn
>> 12) & 0xf;
3356 else if (AARCH64_LDST_SIMD_S (insn
)
3357 || AARCH64_LDST_SIMD_S_PI (insn
))
3359 *rt
= AARCH64_RT (insn
);
3360 r
= (insn
>> 21) & 1;
3361 *load
= AARCH64_BIT (insn
, 22);
3362 opcode
= (insn
>> 13) & 0x7;
3374 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3382 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3394 /* Return TRUE if INSN is multiply-accumulate. */
3397 aarch64_mlxl_p (uint32_t insn
)
3399 uint32_t op31
= AARCH64_OP31 (insn
);
3401 if (AARCH64_MAC (insn
)
3402 && (op31
== 0 || op31
== 1 || op31
== 5)
3403 /* Exclude MUL instructions which are encoded as a multiple accumulate
3405 && AARCH64_RA (insn
) != AARCH64_ZR
)
3411 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3412 it is possible for a 64-bit multiply-accumulate instruction to generate an
3413 incorrect result. The details are quite complex and hard to
3414 determine statically, since branches in the code may exist in some
3415 circumstances, but all cases end with a memory (load, store, or
3416 prefetch) instruction followed immediately by the multiply-accumulate
3417 operation. We employ a linker patching technique, by moving the potentially
3418 affected multiply-accumulate instruction into a patch region and replacing
3419 the original instruction with a branch to the patch. This function checks
3420 if INSN_1 is the memory operation followed by a multiply-accumulate
3421 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3422 if INSN_1 and INSN_2 are safe. */
3425 aarch64_erratum_sequence (uint32_t insn_1
, uint32_t insn_2
)
3435 if (aarch64_mlxl_p (insn_2
)
3436 && aarch64_mem_op_p (insn_1
, &rt
, &rt2
, &pair
, &load
))
3438 /* Any SIMD memory op is independent of the subsequent MLA
3439 by definition of the erratum. */
3440 if (AARCH64_BIT (insn_1
, 26))
3443 /* If not SIMD, check for integer memory ops and MLA relationship. */
3444 rn
= AARCH64_RN (insn_2
);
3445 ra
= AARCH64_RA (insn_2
);
3446 rm
= AARCH64_RM (insn_2
);
3448 /* If this is a load and there's a true(RAW) dependency, we are safe
3449 and this is not an erratum sequence. */
3451 (rt
== rn
|| rt
== rm
|| rt
== ra
3452 || (pair
&& (rt2
== rn
|| rt2
== rm
|| rt2
== ra
))))
3455 /* We conservatively put out stubs for all other cases (including
3463 /* Used to order a list of mapping symbols by address. */
3466 elf_aarch64_compare_mapping (const void *a
, const void *b
)
3468 const elf_aarch64_section_map
*amap
= (const elf_aarch64_section_map
*) a
;
3469 const elf_aarch64_section_map
*bmap
= (const elf_aarch64_section_map
*) b
;
3471 if (amap
->vma
> bmap
->vma
)
3473 else if (amap
->vma
< bmap
->vma
)
3475 else if (amap
->type
> bmap
->type
)
3476 /* Ensure results do not depend on the host qsort for objects with
3477 multiple mapping symbols at the same address by sorting on type
3480 else if (amap
->type
< bmap
->type
)
3488 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes
)
3490 char *stub_name
= (char *) bfd_malloc
3491 (strlen ("__erratum_835769_veneer_") + 16);
3492 sprintf (stub_name
,"__erratum_835769_veneer_%d", num_fixes
);
3496 /* Scan for Cortex-A53 erratum 835769 sequence.
3498 Return TRUE else FALSE on abnormal termination. */
3501 _bfd_aarch64_erratum_835769_scan (bfd
*input_bfd
,
3502 struct bfd_link_info
*info
,
3503 unsigned int *num_fixes_p
)
3506 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3507 unsigned int num_fixes
= *num_fixes_p
;
3512 for (section
= input_bfd
->sections
;
3514 section
= section
->next
)
3516 bfd_byte
*contents
= NULL
;
3517 struct _aarch64_elf_section_data
*sec_data
;
3520 if (elf_section_type (section
) != SHT_PROGBITS
3521 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3522 || (section
->flags
& SEC_EXCLUDE
) != 0
3523 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3524 || (section
->output_section
== bfd_abs_section_ptr
))
3527 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3528 contents
= elf_section_data (section
)->this_hdr
.contents
;
3529 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3532 sec_data
= elf_aarch64_section_data (section
);
3534 qsort (sec_data
->map
, sec_data
->mapcount
,
3535 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3537 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3539 unsigned int span_start
= sec_data
->map
[span
].vma
;
3540 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3541 ? sec_data
->map
[0].vma
+ section
->size
3542 : sec_data
->map
[span
+ 1].vma
);
3544 char span_type
= sec_data
->map
[span
].type
;
3546 if (span_type
== 'd')
3549 for (i
= span_start
; i
+ 4 < span_end
; i
+= 4)
3551 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3552 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3554 if (aarch64_erratum_sequence (insn_1
, insn_2
))
3556 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3557 char *stub_name
= _bfd_aarch64_erratum_835769_stub_name (num_fixes
);
3561 stub_entry
= _bfd_aarch64_add_stub_entry_in_group (stub_name
,
3567 stub_entry
->stub_type
= aarch64_stub_erratum_835769_veneer
;
3568 stub_entry
->target_section
= section
;
3569 stub_entry
->target_value
= i
+ 4;
3570 stub_entry
->veneered_insn
= insn_2
;
3571 stub_entry
->output_name
= stub_name
;
3576 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3580 *num_fixes_p
= num_fixes
;
3586 /* Test if instruction INSN is ADRP. */
3589 _bfd_aarch64_adrp_p (uint32_t insn
)
3591 return ((insn
& 0x9f000000) == 0x90000000);
3595 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3598 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1
, uint32_t insn_2
,
3606 return (aarch64_mem_op_p (insn_2
, &rt
, &rt2
, &pair
, &load
)
3609 && AARCH64_LDST_UIMM (insn_3
)
3610 && AARCH64_RN (insn_3
) == AARCH64_RD (insn_1
));
3614 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3616 Return TRUE if section CONTENTS at offset I contains one of the
3617 erratum 843419 sequences, otherwise return FALSE. If a sequence is
3618 seen set P_VENEER_I to the offset of the final LOAD/STORE
3619 instruction in the sequence.
3623 _bfd_aarch64_erratum_843419_p (bfd_byte
*contents
, bfd_vma vma
,
3624 bfd_vma i
, bfd_vma span_end
,
3625 bfd_vma
*p_veneer_i
)
3627 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3629 if (!_bfd_aarch64_adrp_p (insn_1
))
3632 if (span_end
< i
+ 12)
3635 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3636 uint32_t insn_3
= bfd_getl32 (contents
+ i
+ 8);
3638 if ((vma
& 0xfff) != 0xff8 && (vma
& 0xfff) != 0xffc)
3641 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_3
))
3643 *p_veneer_i
= i
+ 8;
3647 if (span_end
< i
+ 16)
3650 uint32_t insn_4
= bfd_getl32 (contents
+ i
+ 12);
3652 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_4
))
3654 *p_veneer_i
= i
+ 12;
3662 /* Resize all stub sections. */
3665 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table
*htab
)
3669 /* OK, we've added some stubs. Find out the new size of the
3671 for (section
= htab
->stub_bfd
->sections
;
3672 section
!= NULL
; section
= section
->next
)
3674 /* Ignore non-stub sections. */
3675 if (!strstr (section
->name
, STUB_SUFFIX
))
3680 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_size_one_stub
, htab
);
3682 for (section
= htab
->stub_bfd
->sections
;
3683 section
!= NULL
; section
= section
->next
)
3685 if (!strstr (section
->name
, STUB_SUFFIX
))
3691 /* Ensure all stub sections have a size which is a multiple of
3692 4096. This is important in order to ensure that the insertion
3693 of stub sections does not in itself move existing code around
3694 in such a way that new errata sequences are created. */
3695 if (htab
->fix_erratum_843419
)
3697 section
->size
= BFD_ALIGN (section
->size
, 0x1000);
3702 /* Construct an erratum 843419 workaround stub name.
3706 _bfd_aarch64_erratum_843419_stub_name (asection
*input_section
,
3709 const bfd_size_type len
= 8 + 4 + 1 + 8 + 1 + 16 + 1;
3710 char *stub_name
= bfd_malloc (len
);
3712 if (stub_name
!= NULL
)
3713 snprintf (stub_name
, len
, "e843419@%04x_%08x_%" BFD_VMA_FMT
"x",
3714 input_section
->owner
->id
,
3720 /* Build a stub_entry structure describing an 843419 fixup.
3722 The stub_entry constructed is populated with the bit pattern INSN
3723 of the instruction located at OFFSET within input SECTION.
3725 Returns TRUE on success. */
3728 _bfd_aarch64_erratum_843419_fixup (uint32_t insn
,
3729 bfd_vma adrp_offset
,
3730 bfd_vma ldst_offset
,
3732 struct bfd_link_info
*info
)
3734 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3736 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3738 stub_name
= _bfd_aarch64_erratum_843419_stub_name (section
, ldst_offset
);
3739 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3747 /* We always place an 843419 workaround veneer in the stub section
3748 attached to the input section in which an erratum sequence has
3749 been found. This ensures that later in the link process (in
3750 elfNN_aarch64_write_section) when we copy the veneered
3751 instruction from the input section into the stub section the
3752 copied instruction will have had any relocations applied to it.
3753 If we placed workaround veneers in any other stub section then we
3754 could not assume that all relocations have been processed on the
3755 corresponding input section at the point we output the stub
3759 stub_entry
= _bfd_aarch64_add_stub_entry_after (stub_name
, section
, htab
);
3760 if (stub_entry
== NULL
)
3766 stub_entry
->adrp_offset
= adrp_offset
;
3767 stub_entry
->target_value
= ldst_offset
;
3768 stub_entry
->target_section
= section
;
3769 stub_entry
->stub_type
= aarch64_stub_erratum_843419_veneer
;
3770 stub_entry
->veneered_insn
= insn
;
3771 stub_entry
->output_name
= stub_name
;
3777 /* Scan an input section looking for the signature of erratum 843419.
3779 Scans input SECTION in INPUT_BFD looking for erratum 843419
3780 signatures, for each signature found a stub_entry is created
3781 describing the location of the erratum for subsequent fixup.
3783 Return TRUE on successful scan, FALSE on failure to scan.
3787 _bfd_aarch64_erratum_843419_scan (bfd
*input_bfd
, asection
*section
,
3788 struct bfd_link_info
*info
)
3790 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3795 if (elf_section_type (section
) != SHT_PROGBITS
3796 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3797 || (section
->flags
& SEC_EXCLUDE
) != 0
3798 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3799 || (section
->output_section
== bfd_abs_section_ptr
))
3804 bfd_byte
*contents
= NULL
;
3805 struct _aarch64_elf_section_data
*sec_data
;
3808 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3809 contents
= elf_section_data (section
)->this_hdr
.contents
;
3810 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3813 sec_data
= elf_aarch64_section_data (section
);
3815 qsort (sec_data
->map
, sec_data
->mapcount
,
3816 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3818 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3820 unsigned int span_start
= sec_data
->map
[span
].vma
;
3821 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3822 ? sec_data
->map
[0].vma
+ section
->size
3823 : sec_data
->map
[span
+ 1].vma
);
3825 char span_type
= sec_data
->map
[span
].type
;
3827 if (span_type
== 'd')
3830 for (i
= span_start
; i
+ 8 < span_end
; i
+= 4)
3832 bfd_vma vma
= (section
->output_section
->vma
3833 + section
->output_offset
3837 if (_bfd_aarch64_erratum_843419_p
3838 (contents
, vma
, i
, span_end
, &veneer_i
))
3840 uint32_t insn
= bfd_getl32 (contents
+ veneer_i
);
3842 if (!_bfd_aarch64_erratum_843419_fixup (insn
, i
, veneer_i
,
3849 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3858 /* Determine and set the size of the stub section for a final link.
3860 The basic idea here is to examine all the relocations looking for
3861 PC-relative calls to a target that is unreachable with a "bl"
3865 elfNN_aarch64_size_stubs (bfd
*output_bfd
,
3867 struct bfd_link_info
*info
,
3868 bfd_signed_vma group_size
,
3869 asection
* (*add_stub_section
) (const char *,
3871 void (*layout_sections_again
) (void))
3873 bfd_size_type stub_group_size
;
3874 bfd_boolean stubs_always_before_branch
;
3875 bfd_boolean stub_changed
= FALSE
;
3876 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3877 unsigned int num_erratum_835769_fixes
= 0;
3879 /* Propagate mach to stub bfd, because it may not have been
3880 finalized when we created stub_bfd. */
3881 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
3882 bfd_get_mach (output_bfd
));
3884 /* Stash our params away. */
3885 htab
->stub_bfd
= stub_bfd
;
3886 htab
->add_stub_section
= add_stub_section
;
3887 htab
->layout_sections_again
= layout_sections_again
;
3888 stubs_always_before_branch
= group_size
< 0;
3890 stub_group_size
= -group_size
;
3892 stub_group_size
= group_size
;
3894 if (stub_group_size
== 1)
3896 /* Default values. */
3897 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3898 stub_group_size
= 127 * 1024 * 1024;
3901 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3903 (*htab
->layout_sections_again
) ();
3905 if (htab
->fix_erratum_835769
)
3909 for (input_bfd
= info
->input_bfds
;
3910 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3911 if (!_bfd_aarch64_erratum_835769_scan (input_bfd
, info
,
3912 &num_erratum_835769_fixes
))
3915 _bfd_aarch64_resize_stubs (htab
);
3916 (*htab
->layout_sections_again
) ();
3919 if (htab
->fix_erratum_843419
)
3923 for (input_bfd
= info
->input_bfds
;
3925 input_bfd
= input_bfd
->link
.next
)
3929 for (section
= input_bfd
->sections
;
3931 section
= section
->next
)
3932 if (!_bfd_aarch64_erratum_843419_scan (input_bfd
, section
, info
))
3936 _bfd_aarch64_resize_stubs (htab
);
3937 (*htab
->layout_sections_again
) ();
3944 for (input_bfd
= info
->input_bfds
;
3945 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3947 Elf_Internal_Shdr
*symtab_hdr
;
3949 Elf_Internal_Sym
*local_syms
= NULL
;
3951 /* We'll need the symbol table in a second. */
3952 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3953 if (symtab_hdr
->sh_info
== 0)
3956 /* Walk over each section attached to the input bfd. */
3957 for (section
= input_bfd
->sections
;
3958 section
!= NULL
; section
= section
->next
)
3960 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
3962 /* If there aren't any relocs, then there's nothing more
3964 if ((section
->flags
& SEC_RELOC
) == 0
3965 || section
->reloc_count
== 0
3966 || (section
->flags
& SEC_CODE
) == 0)
3969 /* If this section is a link-once section that will be
3970 discarded, then don't create any stubs. */
3971 if (section
->output_section
== NULL
3972 || section
->output_section
->owner
!= output_bfd
)
3975 /* Get the relocs. */
3977 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
3978 NULL
, info
->keep_memory
);
3979 if (internal_relocs
== NULL
)
3980 goto error_ret_free_local
;
3982 /* Now examine each relocation. */
3983 irela
= internal_relocs
;
3984 irelaend
= irela
+ section
->reloc_count
;
3985 for (; irela
< irelaend
; irela
++)
3987 unsigned int r_type
, r_indx
;
3988 enum elf_aarch64_stub_type stub_type
;
3989 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3992 bfd_vma destination
;
3993 struct elf_aarch64_link_hash_entry
*hash
;
3994 const char *sym_name
;
3996 const asection
*id_sec
;
3997 unsigned char st_type
;
4000 r_type
= ELFNN_R_TYPE (irela
->r_info
);
4001 r_indx
= ELFNN_R_SYM (irela
->r_info
);
4003 if (r_type
>= (unsigned int) R_AARCH64_end
)
4005 bfd_set_error (bfd_error_bad_value
);
4006 error_ret_free_internal
:
4007 if (elf_section_data (section
)->relocs
== NULL
)
4008 free (internal_relocs
);
4009 goto error_ret_free_local
;
4012 /* Only look for stubs on unconditional branch and
4013 branch and link instructions. */
4014 if (r_type
!= (unsigned int) AARCH64_R (CALL26
)
4015 && r_type
!= (unsigned int) AARCH64_R (JUMP26
))
4018 /* Now determine the call target, its name, value,
4025 if (r_indx
< symtab_hdr
->sh_info
)
4027 /* It's a local symbol. */
4028 Elf_Internal_Sym
*sym
;
4029 Elf_Internal_Shdr
*hdr
;
4031 if (local_syms
== NULL
)
4034 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4035 if (local_syms
== NULL
)
4037 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4038 symtab_hdr
->sh_info
, 0,
4040 if (local_syms
== NULL
)
4041 goto error_ret_free_internal
;
4044 sym
= local_syms
+ r_indx
;
4045 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4046 sym_sec
= hdr
->bfd_section
;
4048 /* This is an undefined symbol. It can never
4052 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4053 sym_value
= sym
->st_value
;
4054 destination
= (sym_value
+ irela
->r_addend
4055 + sym_sec
->output_offset
4056 + sym_sec
->output_section
->vma
);
4057 st_type
= ELF_ST_TYPE (sym
->st_info
);
4059 = bfd_elf_string_from_elf_section (input_bfd
,
4060 symtab_hdr
->sh_link
,
4067 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4068 hash
= ((struct elf_aarch64_link_hash_entry
*)
4069 elf_sym_hashes (input_bfd
)[e_indx
]);
4071 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4072 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4073 hash
= ((struct elf_aarch64_link_hash_entry
*)
4074 hash
->root
.root
.u
.i
.link
);
4076 if (hash
->root
.root
.type
== bfd_link_hash_defined
4077 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4079 struct elf_aarch64_link_hash_table
*globals
=
4080 elf_aarch64_hash_table (info
);
4081 sym_sec
= hash
->root
.root
.u
.def
.section
;
4082 sym_value
= hash
->root
.root
.u
.def
.value
;
4083 /* For a destination in a shared library,
4084 use the PLT stub as target address to
4085 decide whether a branch stub is
4087 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4088 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4090 sym_sec
= globals
->root
.splt
;
4091 sym_value
= hash
->root
.plt
.offset
;
4092 if (sym_sec
->output_section
!= NULL
)
4093 destination
= (sym_value
4094 + sym_sec
->output_offset
4096 sym_sec
->output_section
->vma
);
4098 else if (sym_sec
->output_section
!= NULL
)
4099 destination
= (sym_value
+ irela
->r_addend
4100 + sym_sec
->output_offset
4101 + sym_sec
->output_section
->vma
);
4103 else if (hash
->root
.root
.type
== bfd_link_hash_undefined
4104 || (hash
->root
.root
.type
4105 == bfd_link_hash_undefweak
))
4107 /* For a shared library, use the PLT stub as
4108 target address to decide whether a long
4109 branch stub is needed.
4110 For absolute code, they cannot be handled. */
4111 struct elf_aarch64_link_hash_table
*globals
=
4112 elf_aarch64_hash_table (info
);
4114 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4115 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4117 sym_sec
= globals
->root
.splt
;
4118 sym_value
= hash
->root
.plt
.offset
;
4119 if (sym_sec
->output_section
!= NULL
)
4120 destination
= (sym_value
4121 + sym_sec
->output_offset
4123 sym_sec
->output_section
->vma
);
4130 bfd_set_error (bfd_error_bad_value
);
4131 goto error_ret_free_internal
;
4133 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4134 sym_name
= hash
->root
.root
.root
.string
;
4137 /* Determine what (if any) linker stub is needed. */
4138 stub_type
= aarch64_type_of_stub
4139 (info
, section
, irela
, sym_sec
, st_type
, hash
, destination
);
4140 if (stub_type
== aarch64_stub_none
)
4143 /* Support for grouping stub sections. */
4144 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4146 /* Get the name of this stub. */
4147 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, hash
,
4150 goto error_ret_free_internal
;
4153 aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
4154 stub_name
, FALSE
, FALSE
);
4155 if (stub_entry
!= NULL
)
4157 /* The proper stub has already been created. */
4162 stub_entry
= _bfd_aarch64_add_stub_entry_in_group
4163 (stub_name
, section
, htab
);
4164 if (stub_entry
== NULL
)
4167 goto error_ret_free_internal
;
4170 stub_entry
->target_value
= sym_value
;
4171 stub_entry
->target_section
= sym_sec
;
4172 stub_entry
->stub_type
= stub_type
;
4173 stub_entry
->h
= hash
;
4174 stub_entry
->st_type
= st_type
;
4176 if (sym_name
== NULL
)
4177 sym_name
= "unnamed";
4178 len
= sizeof (STUB_ENTRY_NAME
) + strlen (sym_name
);
4179 stub_entry
->output_name
= bfd_alloc (htab
->stub_bfd
, len
);
4180 if (stub_entry
->output_name
== NULL
)
4183 goto error_ret_free_internal
;
4186 snprintf (stub_entry
->output_name
, len
, STUB_ENTRY_NAME
,
4189 stub_changed
= TRUE
;
4192 /* We're done with the internal relocs, free them. */
4193 if (elf_section_data (section
)->relocs
== NULL
)
4194 free (internal_relocs
);
4201 _bfd_aarch64_resize_stubs (htab
);
4203 /* Ask the linker to do its stuff. */
4204 (*htab
->layout_sections_again
) ();
4205 stub_changed
= FALSE
;
4210 error_ret_free_local
:
4214 /* Build all the stubs associated with the current output file. The
4215 stubs are kept in a hash table attached to the main linker hash
4216 table. We also set up the .plt entries for statically linked PIC
4217 functions here. This function is called via aarch64_elf_finish in the
4221 elfNN_aarch64_build_stubs (struct bfd_link_info
*info
)
4224 struct bfd_hash_table
*table
;
4225 struct elf_aarch64_link_hash_table
*htab
;
4227 htab
= elf_aarch64_hash_table (info
);
4229 for (stub_sec
= htab
->stub_bfd
->sections
;
4230 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
4234 /* Ignore non-stub sections. */
4235 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4238 /* Allocate memory to hold the linker stubs. */
4239 size
= stub_sec
->size
;
4240 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4241 if (stub_sec
->contents
== NULL
&& size
!= 0)
4245 bfd_putl32 (0x14000000 | (size
>> 2), stub_sec
->contents
);
4246 stub_sec
->size
+= 4;
4249 /* Build the stubs as directed by the stub hash table. */
4250 table
= &htab
->stub_hash_table
;
4251 bfd_hash_traverse (table
, aarch64_build_one_stub
, info
);
4257 /* Add an entry to the code/data map for section SEC. */
4260 elfNN_aarch64_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
4262 struct _aarch64_elf_section_data
*sec_data
=
4263 elf_aarch64_section_data (sec
);
4264 unsigned int newidx
;
4266 if (sec_data
->map
== NULL
)
4268 sec_data
->map
= bfd_malloc (sizeof (elf_aarch64_section_map
));
4269 sec_data
->mapcount
= 0;
4270 sec_data
->mapsize
= 1;
4273 newidx
= sec_data
->mapcount
++;
4275 if (sec_data
->mapcount
> sec_data
->mapsize
)
4277 sec_data
->mapsize
*= 2;
4278 sec_data
->map
= bfd_realloc_or_free
4279 (sec_data
->map
, sec_data
->mapsize
* sizeof (elf_aarch64_section_map
));
4284 sec_data
->map
[newidx
].vma
= vma
;
4285 sec_data
->map
[newidx
].type
= type
;
4290 /* Initialise maps of insn/data for input BFDs. */
4292 bfd_elfNN_aarch64_init_maps (bfd
*abfd
)
4294 Elf_Internal_Sym
*isymbuf
;
4295 Elf_Internal_Shdr
*hdr
;
4296 unsigned int i
, localsyms
;
4298 /* Make sure that we are dealing with an AArch64 elf binary. */
4299 if (!is_aarch64_elf (abfd
))
4302 if ((abfd
->flags
& DYNAMIC
) != 0)
4305 hdr
= &elf_symtab_hdr (abfd
);
4306 localsyms
= hdr
->sh_info
;
4308 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4309 should contain the number of local symbols, which should come before any
4310 global symbols. Mapping symbols are always local. */
4311 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
, NULL
);
4313 /* No internal symbols read? Skip this BFD. */
4314 if (isymbuf
== NULL
)
4317 for (i
= 0; i
< localsyms
; i
++)
4319 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
4320 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4323 if (sec
!= NULL
&& ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
4325 name
= bfd_elf_string_from_elf_section (abfd
,
4329 if (bfd_is_aarch64_special_symbol_name
4330 (name
, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP
))
4331 elfNN_aarch64_section_map_add (sec
, name
[1], isym
->st_value
);
4336 /* Set option values needed during linking. */
4338 bfd_elfNN_aarch64_set_options (struct bfd
*output_bfd
,
4339 struct bfd_link_info
*link_info
,
4341 int no_wchar_warn
, int pic_veneer
,
4342 int fix_erratum_835769
,
4343 int fix_erratum_843419
)
4345 struct elf_aarch64_link_hash_table
*globals
;
4347 globals
= elf_aarch64_hash_table (link_info
);
4348 globals
->pic_veneer
= pic_veneer
;
4349 globals
->fix_erratum_835769
= fix_erratum_835769
;
4350 globals
->fix_erratum_843419
= fix_erratum_843419
;
4351 globals
->fix_erratum_843419_adr
= TRUE
;
4353 BFD_ASSERT (is_aarch64_elf (output_bfd
));
4354 elf_aarch64_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
4355 elf_aarch64_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
4359 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry
*h
,
4360 struct elf_aarch64_link_hash_table
4361 *globals
, struct bfd_link_info
*info
,
4362 bfd_vma value
, bfd
*output_bfd
,
4363 bfd_boolean
*unresolved_reloc_p
)
4365 bfd_vma off
= (bfd_vma
) - 1;
4366 asection
*basegot
= globals
->root
.sgot
;
4367 bfd_boolean dyn
= globals
->root
.dynamic_sections_created
;
4371 BFD_ASSERT (basegot
!= NULL
);
4372 off
= h
->got
.offset
;
4373 BFD_ASSERT (off
!= (bfd_vma
) - 1);
4374 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
4375 || (bfd_link_pic (info
)
4376 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4377 || (ELF_ST_VISIBILITY (h
->other
)
4378 && h
->root
.type
== bfd_link_hash_undefweak
))
4380 /* This is actually a static link, or it is a -Bsymbolic link
4381 and the symbol is defined locally. We must initialize this
4382 entry in the global offset table. Since the offset must
4383 always be a multiple of 8 (4 in the case of ILP32), we use
4384 the least significant bit to record whether we have
4385 initialized it already.
4386 When doing a dynamic link, we create a .rel(a).got relocation
4387 entry to initialize the value. This is done in the
4388 finish_dynamic_symbol routine. */
4393 bfd_put_NN (output_bfd
, value
, basegot
->contents
+ off
);
4398 *unresolved_reloc_p
= FALSE
;
4400 off
= off
+ basegot
->output_section
->vma
+ basegot
->output_offset
;
4406 /* Change R_TYPE to a more efficient access model where possible,
4407 return the new reloc type. */
4409 static bfd_reloc_code_real_type
4410 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type
,
4411 struct elf_link_hash_entry
*h
)
4413 bfd_boolean is_local
= h
== NULL
;
4417 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4418 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4420 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4421 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
);
4423 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4425 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4428 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4430 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4431 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4433 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
4434 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4436 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4437 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
);
4439 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4440 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
: r_type
;
4442 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
4443 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
: r_type
;
4445 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4448 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4450 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4451 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4453 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
4454 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4455 /* Instructions with these relocations will become NOPs. */
4456 return BFD_RELOC_AARCH64_NONE
;
4458 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4459 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4460 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4461 return is_local
? BFD_RELOC_AARCH64_NONE
: r_type
;
4471 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type
)
4475 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
4476 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
4477 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
4478 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
4479 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
4480 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
4481 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
4482 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
4483 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
4486 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4487 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4488 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4489 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4490 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4491 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4492 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4493 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4496 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
4497 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4498 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4499 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4500 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
4501 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
4502 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4503 return GOT_TLSDESC_GD
;
4505 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4506 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
4507 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
4508 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4518 aarch64_can_relax_tls (bfd
*input_bfd
,
4519 struct bfd_link_info
*info
,
4520 bfd_reloc_code_real_type r_type
,
4521 struct elf_link_hash_entry
*h
,
4522 unsigned long r_symndx
)
4524 unsigned int symbol_got_type
;
4525 unsigned int reloc_got_type
;
4527 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type
))
4530 symbol_got_type
= elfNN_aarch64_symbol_got_type (h
, input_bfd
, r_symndx
);
4531 reloc_got_type
= aarch64_reloc_got_type (r_type
);
4533 if (symbol_got_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (reloc_got_type
))
4536 if (bfd_link_pic (info
))
4539 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
)
4545 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4548 static bfd_reloc_code_real_type
4549 aarch64_tls_transition (bfd
*input_bfd
,
4550 struct bfd_link_info
*info
,
4551 unsigned int r_type
,
4552 struct elf_link_hash_entry
*h
,
4553 unsigned long r_symndx
)
4555 bfd_reloc_code_real_type bfd_r_type
4556 = elfNN_aarch64_bfd_reloc_from_type (r_type
);
4558 if (! aarch64_can_relax_tls (input_bfd
, info
, bfd_r_type
, h
, r_symndx
))
4561 return aarch64_tls_transition_without_check (bfd_r_type
, h
);
4564 /* Return the base VMA address which should be subtracted from real addresses
4565 when resolving R_AARCH64_TLS_DTPREL relocation. */
4568 dtpoff_base (struct bfd_link_info
*info
)
4570 /* If tls_sec is NULL, we should have signalled an error already. */
4571 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4572 return elf_hash_table (info
)->tls_sec
->vma
;
4575 /* Return the base VMA address which should be subtracted from real addresses
4576 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4579 tpoff_base (struct bfd_link_info
*info
)
4581 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
4583 /* If tls_sec is NULL, we should have signalled an error already. */
4584 BFD_ASSERT (htab
->tls_sec
!= NULL
);
4586 bfd_vma base
= align_power ((bfd_vma
) TCB_SIZE
,
4587 htab
->tls_sec
->alignment_power
);
4588 return htab
->tls_sec
->vma
- base
;
4592 symbol_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4593 unsigned long r_symndx
)
4595 /* Calculate the address of the GOT entry for symbol
4596 referred to in h. */
4598 return &h
->got
.offset
;
4602 struct elf_aarch64_local_symbol
*l
;
4604 l
= elf_aarch64_locals (input_bfd
);
4605 return &l
[r_symndx
].got_offset
;
4610 symbol_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4611 unsigned long r_symndx
)
4614 p
= symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4619 symbol_got_offset_mark_p (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4620 unsigned long r_symndx
)
4623 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4628 symbol_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4629 unsigned long r_symndx
)
4632 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4638 symbol_tlsdesc_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4639 unsigned long r_symndx
)
4641 /* Calculate the address of the GOT entry for symbol
4642 referred to in h. */
4645 struct elf_aarch64_link_hash_entry
*eh
;
4646 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
4647 return &eh
->tlsdesc_got_jump_table_offset
;
4652 struct elf_aarch64_local_symbol
*l
;
4654 l
= elf_aarch64_locals (input_bfd
);
4655 return &l
[r_symndx
].tlsdesc_got_jump_table_offset
;
4660 symbol_tlsdesc_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4661 unsigned long r_symndx
)
4664 p
= symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4669 symbol_tlsdesc_got_offset_mark_p (bfd
*input_bfd
,
4670 struct elf_link_hash_entry
*h
,
4671 unsigned long r_symndx
)
4674 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4679 symbol_tlsdesc_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4680 unsigned long r_symndx
)
4683 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4688 /* Data for make_branch_to_erratum_835769_stub(). */
4690 struct erratum_835769_branch_to_stub_data
4692 struct bfd_link_info
*info
;
4693 asection
*output_section
;
4697 /* Helper to insert branches to erratum 835769 stubs in the right
4698 places for a particular section. */
4701 make_branch_to_erratum_835769_stub (struct bfd_hash_entry
*gen_entry
,
4704 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4705 struct erratum_835769_branch_to_stub_data
*data
;
4707 unsigned long branch_insn
= 0;
4708 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
4709 bfd_signed_vma branch_offset
;
4710 unsigned int target
;
4713 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4714 data
= (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4716 if (stub_entry
->target_section
!= data
->output_section
4717 || stub_entry
->stub_type
!= aarch64_stub_erratum_835769_veneer
)
4720 contents
= data
->contents
;
4721 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4722 + stub_entry
->target_section
->output_offset
4723 + stub_entry
->target_value
;
4724 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4725 + stub_entry
->stub_sec
->output_offset
4726 + stub_entry
->stub_offset
;
4727 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4729 abfd
= stub_entry
->target_section
->owner
;
4730 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4731 (*_bfd_error_handler
)
4732 (_("%B: error: Erratum 835769 stub out "
4733 "of range (input file too large)"), abfd
);
4735 target
= stub_entry
->target_value
;
4736 branch_insn
= 0x14000000;
4737 branch_offset
>>= 2;
4738 branch_offset
&= 0x3ffffff;
4739 branch_insn
|= branch_offset
;
4740 bfd_putl32 (branch_insn
, &contents
[target
]);
4747 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry
*gen_entry
,
4750 struct elf_aarch64_stub_hash_entry
*stub_entry
4751 = (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4752 struct erratum_835769_branch_to_stub_data
*data
4753 = (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4754 struct bfd_link_info
*info
;
4755 struct elf_aarch64_link_hash_table
*htab
;
4763 contents
= data
->contents
;
4764 section
= data
->output_section
;
4766 htab
= elf_aarch64_hash_table (info
);
4768 if (stub_entry
->target_section
!= section
4769 || stub_entry
->stub_type
!= aarch64_stub_erratum_843419_veneer
)
4772 insn
= bfd_getl32 (contents
+ stub_entry
->target_value
);
4774 stub_entry
->stub_sec
->contents
+ stub_entry
->stub_offset
);
4776 place
= (section
->output_section
->vma
+ section
->output_offset
4777 + stub_entry
->adrp_offset
);
4778 insn
= bfd_getl32 (contents
+ stub_entry
->adrp_offset
);
4780 if ((insn
& AARCH64_ADRP_OP_MASK
) != AARCH64_ADRP_OP
)
4783 bfd_signed_vma imm
=
4784 (_bfd_aarch64_sign_extend
4785 ((bfd_vma
) _bfd_aarch64_decode_adrp_imm (insn
) << 12, 33)
4788 if (htab
->fix_erratum_843419_adr
4789 && (imm
>= AARCH64_MIN_ADRP_IMM
&& imm
<= AARCH64_MAX_ADRP_IMM
))
4791 insn
= (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP
, imm
)
4792 | AARCH64_RT (insn
));
4793 bfd_putl32 (insn
, contents
+ stub_entry
->adrp_offset
);
4797 bfd_vma veneered_insn_loc
;
4798 bfd_vma veneer_entry_loc
;
4799 bfd_signed_vma branch_offset
;
4800 uint32_t branch_insn
;
4802 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4803 + stub_entry
->target_section
->output_offset
4804 + stub_entry
->target_value
;
4805 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4806 + stub_entry
->stub_sec
->output_offset
4807 + stub_entry
->stub_offset
;
4808 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4810 abfd
= stub_entry
->target_section
->owner
;
4811 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4812 (*_bfd_error_handler
)
4813 (_("%B: error: Erratum 843419 stub out "
4814 "of range (input file too large)"), abfd
);
4816 branch_insn
= 0x14000000;
4817 branch_offset
>>= 2;
4818 branch_offset
&= 0x3ffffff;
4819 branch_insn
|= branch_offset
;
4820 bfd_putl32 (branch_insn
, contents
+ stub_entry
->target_value
);
4827 elfNN_aarch64_write_section (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4828 struct bfd_link_info
*link_info
,
4833 struct elf_aarch64_link_hash_table
*globals
=
4834 elf_aarch64_hash_table (link_info
);
4836 if (globals
== NULL
)
4839 /* Fix code to point to erratum 835769 stubs. */
4840 if (globals
->fix_erratum_835769
)
4842 struct erratum_835769_branch_to_stub_data data
;
4844 data
.info
= link_info
;
4845 data
.output_section
= sec
;
4846 data
.contents
= contents
;
4847 bfd_hash_traverse (&globals
->stub_hash_table
,
4848 make_branch_to_erratum_835769_stub
, &data
);
4851 if (globals
->fix_erratum_843419
)
4853 struct erratum_835769_branch_to_stub_data data
;
4855 data
.info
= link_info
;
4856 data
.output_section
= sec
;
4857 data
.contents
= contents
;
4858 bfd_hash_traverse (&globals
->stub_hash_table
,
4859 _bfd_aarch64_erratum_843419_branch_to_stub
, &data
);
4865 /* Perform a relocation as part of a final link. */
4866 static bfd_reloc_status_type
4867 elfNN_aarch64_final_link_relocate (reloc_howto_type
*howto
,
4870 asection
*input_section
,
4872 Elf_Internal_Rela
*rel
,
4874 struct bfd_link_info
*info
,
4876 struct elf_link_hash_entry
*h
,
4877 bfd_boolean
*unresolved_reloc_p
,
4878 bfd_boolean save_addend
,
4879 bfd_vma
*saved_addend
,
4880 Elf_Internal_Sym
*sym
)
4882 Elf_Internal_Shdr
*symtab_hdr
;
4883 unsigned int r_type
= howto
->type
;
4884 bfd_reloc_code_real_type bfd_r_type
4885 = elfNN_aarch64_bfd_reloc_from_howto (howto
);
4886 bfd_reloc_code_real_type new_bfd_r_type
;
4887 unsigned long r_symndx
;
4888 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
4890 bfd_signed_vma signed_addend
;
4891 struct elf_aarch64_link_hash_table
*globals
;
4892 bfd_boolean weak_undef_p
;
4895 globals
= elf_aarch64_hash_table (info
);
4897 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4899 BFD_ASSERT (is_aarch64_elf (input_bfd
));
4901 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
4903 /* It is possible to have linker relaxations on some TLS access
4904 models. Update our information here. */
4905 new_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
, h
, r_symndx
);
4906 if (new_bfd_r_type
!= bfd_r_type
)
4908 bfd_r_type
= new_bfd_r_type
;
4909 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
4910 BFD_ASSERT (howto
!= NULL
);
4911 r_type
= howto
->type
;
4914 place
= input_section
->output_section
->vma
4915 + input_section
->output_offset
+ rel
->r_offset
;
4917 /* Get addend, accumulating the addend for consecutive relocs
4918 which refer to the same offset. */
4919 signed_addend
= saved_addend
? *saved_addend
: 0;
4920 signed_addend
+= rel
->r_addend
;
4922 weak_undef_p
= (h
? h
->root
.type
== bfd_link_hash_undefweak
4923 : bfd_is_und_section (sym_sec
));
4925 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4926 it here if it is defined in a non-shared object. */
4928 && h
->type
== STT_GNU_IFUNC
4935 if ((input_section
->flags
& SEC_ALLOC
) == 0
4936 || h
->plt
.offset
== (bfd_vma
) -1)
4939 /* STT_GNU_IFUNC symbol must go through PLT. */
4940 plt
= globals
->root
.splt
? globals
->root
.splt
: globals
->root
.iplt
;
4941 value
= (plt
->output_section
->vma
+ plt
->output_offset
+ h
->plt
.offset
);
4946 if (h
->root
.root
.string
)
4947 name
= h
->root
.root
.string
;
4949 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4951 (*_bfd_error_handler
)
4952 (_("%B: relocation %s against STT_GNU_IFUNC "
4953 "symbol `%s' isn't handled by %s"), input_bfd
,
4954 howto
->name
, name
, __FUNCTION__
);
4955 bfd_set_error (bfd_error_bad_value
);
4958 case BFD_RELOC_AARCH64_NN
:
4959 if (rel
->r_addend
!= 0)
4961 if (h
->root
.root
.string
)
4962 name
= h
->root
.root
.string
;
4964 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4966 (*_bfd_error_handler
)
4967 (_("%B: relocation %s against STT_GNU_IFUNC "
4968 "symbol `%s' has non-zero addend: %d"),
4969 input_bfd
, howto
->name
, name
, rel
->r_addend
);
4970 bfd_set_error (bfd_error_bad_value
);
4974 /* Generate dynamic relocation only when there is a
4975 non-GOT reference in a shared object. */
4976 if (bfd_link_pic (info
) && h
->non_got_ref
)
4978 Elf_Internal_Rela outrel
;
4981 /* Need a dynamic relocation to get the real function
4983 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
4987 if (outrel
.r_offset
== (bfd_vma
) -1
4988 || outrel
.r_offset
== (bfd_vma
) -2)
4991 outrel
.r_offset
+= (input_section
->output_section
->vma
4992 + input_section
->output_offset
);
4994 if (h
->dynindx
== -1
4996 || bfd_link_executable (info
))
4998 /* This symbol is resolved locally. */
4999 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
5000 outrel
.r_addend
= (h
->root
.u
.def
.value
5001 + h
->root
.u
.def
.section
->output_section
->vma
5002 + h
->root
.u
.def
.section
->output_offset
);
5006 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5007 outrel
.r_addend
= 0;
5010 sreloc
= globals
->root
.irelifunc
;
5011 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5013 /* If this reloc is against an external symbol, we
5014 do not want to fiddle with the addend. Otherwise,
5015 we need to include the symbol value so that it
5016 becomes an addend for the dynamic reloc. For an
5017 internal symbol, we have updated addend. */
5018 return bfd_reloc_ok
;
5021 case BFD_RELOC_AARCH64_CALL26
:
5022 case BFD_RELOC_AARCH64_JUMP26
:
5023 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5026 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5028 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5029 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5030 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5031 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5032 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5033 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5034 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5035 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5036 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5037 base_got
= globals
->root
.sgot
;
5038 off
= h
->got
.offset
;
5040 if (base_got
== NULL
)
5043 if (off
== (bfd_vma
) -1)
5047 /* We can't use h->got.offset here to save state, or
5048 even just remember the offset, as finish_dynamic_symbol
5049 would use that as offset into .got. */
5051 if (globals
->root
.splt
!= NULL
)
5053 plt_index
= ((h
->plt
.offset
- globals
->plt_header_size
) /
5054 globals
->plt_entry_size
);
5055 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
5056 base_got
= globals
->root
.sgotplt
;
5060 plt_index
= h
->plt
.offset
/ globals
->plt_entry_size
;
5061 off
= plt_index
* GOT_ENTRY_SIZE
;
5062 base_got
= globals
->root
.igotplt
;
5065 if (h
->dynindx
== -1
5069 /* This references the local definition. We must
5070 initialize this entry in the global offset table.
5071 Since the offset must always be a multiple of 8,
5072 we use the least significant bit to record
5073 whether we have initialized it already.
5075 When doing a dynamic link, we create a .rela.got
5076 relocation entry to initialize the value. This
5077 is done in the finish_dynamic_symbol routine. */
5082 bfd_put_NN (output_bfd
, value
,
5083 base_got
->contents
+ off
);
5084 /* Note that this is harmless as -1 | 1 still is -1. */
5088 value
= (base_got
->output_section
->vma
5089 + base_got
->output_offset
+ off
);
5092 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
,
5094 unresolved_reloc_p
);
5098 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5099 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5100 addend
= (globals
->root
.sgot
->output_section
->vma
5101 + globals
->root
.sgot
->output_offset
);
5103 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5104 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5105 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5106 value
= (value
- globals
->root
.sgot
->output_section
->vma
5107 - globals
->root
.sgot
->output_offset
);
5112 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5113 addend
, weak_undef_p
);
5114 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
, howto
, value
);
5115 case BFD_RELOC_AARCH64_ADD_LO12
:
5116 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5123 case BFD_RELOC_AARCH64_NONE
:
5124 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5125 *unresolved_reloc_p
= FALSE
;
5126 return bfd_reloc_ok
;
5128 case BFD_RELOC_AARCH64_NN
:
5130 /* When generating a shared object or relocatable executable, these
5131 relocations are copied into the output file to be resolved at
5133 if (((bfd_link_pic (info
) == TRUE
)
5134 || globals
->root
.is_relocatable_executable
)
5135 && (input_section
->flags
& SEC_ALLOC
)
5137 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5138 || h
->root
.type
!= bfd_link_hash_undefweak
))
5140 Elf_Internal_Rela outrel
;
5142 bfd_boolean skip
, relocate
;
5145 *unresolved_reloc_p
= FALSE
;
5150 outrel
.r_addend
= signed_addend
;
5152 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5154 if (outrel
.r_offset
== (bfd_vma
) - 1)
5156 else if (outrel
.r_offset
== (bfd_vma
) - 2)
5162 outrel
.r_offset
+= (input_section
->output_section
->vma
5163 + input_section
->output_offset
);
5166 memset (&outrel
, 0, sizeof outrel
);
5169 && (!bfd_link_pic (info
)
5170 || !SYMBOLIC_BIND (info
, h
)
5171 || !h
->def_regular
))
5172 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5177 /* On SVR4-ish systems, the dynamic loader cannot
5178 relocate the text and data segments independently,
5179 so the symbol does not matter. */
5181 outrel
.r_info
= ELFNN_R_INFO (symbol
, AARCH64_R (RELATIVE
));
5182 outrel
.r_addend
+= value
;
5185 sreloc
= elf_section_data (input_section
)->sreloc
;
5186 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
5187 return bfd_reloc_notsupported
;
5189 loc
= sreloc
->contents
+ sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
5190 bfd_elfNN_swap_reloca_out (output_bfd
, &outrel
, loc
);
5192 if (sreloc
->reloc_count
* RELOC_SIZE (globals
) > sreloc
->size
)
5194 /* Sanity to check that we have previously allocated
5195 sufficient space in the relocation section for the
5196 number of relocations we actually want to emit. */
5200 /* If this reloc is against an external symbol, we do not want to
5201 fiddle with the addend. Otherwise, we need to include the symbol
5202 value so that it becomes an addend for the dynamic reloc. */
5204 return bfd_reloc_ok
;
5206 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5207 contents
, rel
->r_offset
, value
,
5211 value
+= signed_addend
;
5214 case BFD_RELOC_AARCH64_CALL26
:
5215 case BFD_RELOC_AARCH64_JUMP26
:
5217 asection
*splt
= globals
->root
.splt
;
5218 bfd_boolean via_plt_p
=
5219 splt
!= NULL
&& h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) - 1;
5221 /* A call to an undefined weak symbol is converted to a jump to
5222 the next instruction unless a PLT entry will be created.
5223 The jump to the next instruction is optimized as a NOP.
5224 Do the same for local undefined symbols. */
5225 if (weak_undef_p
&& ! via_plt_p
)
5227 bfd_putl32 (INSN_NOP
, hit_data
);
5228 return bfd_reloc_ok
;
5231 /* If the call goes through a PLT entry, make sure to
5232 check distance to the right destination address. */
5234 value
= (splt
->output_section
->vma
5235 + splt
->output_offset
+ h
->plt
.offset
);
5237 /* Check if a stub has to be inserted because the destination
5239 struct elf_aarch64_stub_hash_entry
*stub_entry
= NULL
;
5240 if (! aarch64_valid_branch_p (value
, place
))
5241 /* The target is out of reach, so redirect the branch to
5242 the local stub for this function. */
5243 stub_entry
= elfNN_aarch64_get_stub_entry (input_section
, sym_sec
, h
,
5245 if (stub_entry
!= NULL
)
5246 value
= (stub_entry
->stub_offset
5247 + stub_entry
->stub_sec
->output_offset
5248 + stub_entry
->stub_sec
->output_section
->vma
);
5250 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5251 signed_addend
, weak_undef_p
);
5252 *unresolved_reloc_p
= FALSE
;
5255 case BFD_RELOC_AARCH64_16_PCREL
:
5256 case BFD_RELOC_AARCH64_32_PCREL
:
5257 case BFD_RELOC_AARCH64_64_PCREL
:
5258 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
5259 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5260 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
5261 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
5262 if (bfd_link_pic (info
)
5263 && (input_section
->flags
& SEC_ALLOC
) != 0
5264 && (input_section
->flags
& SEC_READONLY
) != 0
5268 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5270 (*_bfd_error_handler
)
5271 (_("%B: relocation %s against external symbol `%s' can not be used"
5272 " when making a shared object; recompile with -fPIC"),
5273 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
5274 h
->root
.root
.string
);
5275 bfd_set_error (bfd_error_bad_value
);
5279 case BFD_RELOC_AARCH64_16
:
5281 case BFD_RELOC_AARCH64_32
:
5283 case BFD_RELOC_AARCH64_ADD_LO12
:
5284 case BFD_RELOC_AARCH64_BRANCH19
:
5285 case BFD_RELOC_AARCH64_LDST128_LO12
:
5286 case BFD_RELOC_AARCH64_LDST16_LO12
:
5287 case BFD_RELOC_AARCH64_LDST32_LO12
:
5288 case BFD_RELOC_AARCH64_LDST64_LO12
:
5289 case BFD_RELOC_AARCH64_LDST8_LO12
:
5290 case BFD_RELOC_AARCH64_MOVW_G0
:
5291 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
5292 case BFD_RELOC_AARCH64_MOVW_G0_S
:
5293 case BFD_RELOC_AARCH64_MOVW_G1
:
5294 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
5295 case BFD_RELOC_AARCH64_MOVW_G1_S
:
5296 case BFD_RELOC_AARCH64_MOVW_G2
:
5297 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
5298 case BFD_RELOC_AARCH64_MOVW_G2_S
:
5299 case BFD_RELOC_AARCH64_MOVW_G3
:
5300 case BFD_RELOC_AARCH64_TSTBR14
:
5301 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5302 signed_addend
, weak_undef_p
);
5305 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5306 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5307 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5308 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5309 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5310 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5311 if (globals
->root
.sgot
== NULL
)
5312 BFD_ASSERT (h
!= NULL
);
5317 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5319 unresolved_reloc_p
);
5320 if (bfd_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5321 || bfd_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
5322 addend
= (globals
->root
.sgot
->output_section
->vma
5323 + globals
->root
.sgot
->output_offset
);
5324 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5325 addend
, weak_undef_p
);
5330 struct elf_aarch64_local_symbol
*locals
5331 = elf_aarch64_locals (input_bfd
);
5335 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5336 (*_bfd_error_handler
)
5337 (_("%B: Local symbol descriptor table be NULL when applying "
5338 "relocation %s against local symbol"),
5339 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5343 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5344 base_got
= globals
->root
.sgot
;
5345 bfd_vma got_entry_addr
= (base_got
->output_section
->vma
5346 + base_got
->output_offset
+ off
);
5348 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5350 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
5352 if (bfd_link_pic (info
))
5355 Elf_Internal_Rela outrel
;
5357 /* For local symbol, we have done absolute relocation in static
5358 linking stageh. While for share library, we need to update
5359 the content of GOT entry according to the share objects
5360 loading base address. So we need to generate a
5361 R_AARCH64_RELATIVE reloc for dynamic linker. */
5362 s
= globals
->root
.srelgot
;
5366 outrel
.r_offset
= got_entry_addr
;
5367 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
5368 outrel
.r_addend
= value
;
5369 elf_append_rela (output_bfd
, s
, &outrel
);
5372 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5375 /* Update the relocation value to GOT entry addr as we have transformed
5376 the direct data access into indirect data access through GOT. */
5377 value
= got_entry_addr
;
5379 if (bfd_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5380 || bfd_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
5381 addend
= base_got
->output_section
->vma
+ base_got
->output_offset
;
5383 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5384 addend
, weak_undef_p
);
5389 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5390 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5391 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5393 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5395 unresolved_reloc_p
);
5398 struct elf_aarch64_local_symbol
*locals
5399 = elf_aarch64_locals (input_bfd
);
5403 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5404 (*_bfd_error_handler
)
5405 (_("%B: Local symbol descriptor table be NULL when applying "
5406 "relocation %s against local symbol"),
5407 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5411 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5412 base_got
= globals
->root
.sgot
;
5413 if (base_got
== NULL
)
5416 bfd_vma got_entry_addr
= (base_got
->output_section
->vma
5417 + base_got
->output_offset
+ off
);
5419 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5421 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
5423 if (bfd_link_pic (info
))
5426 Elf_Internal_Rela outrel
;
5428 /* For local symbol, we have done absolute relocation in static
5429 linking stage. While for share library, we need to update
5430 the content of GOT entry according to the share objects
5431 loading base address. So we need to generate a
5432 R_AARCH64_RELATIVE reloc for dynamic linker. */
5433 s
= globals
->root
.srelgot
;
5437 outrel
.r_offset
= got_entry_addr
;
5438 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
5439 outrel
.r_addend
= value
;
5440 elf_append_rela (output_bfd
, s
, &outrel
);
5443 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5447 /* Update the relocation value to GOT entry addr as we have transformed
5448 the direct data access into indirect data access through GOT. */
5449 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5450 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5452 *unresolved_reloc_p
= FALSE
;
5455 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5456 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5457 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5458 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5459 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
5460 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5461 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5462 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
5463 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
5464 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
5465 if (globals
->root
.sgot
== NULL
)
5466 return bfd_reloc_notsupported
;
5468 value
= (symbol_got_offset (input_bfd
, h
, r_symndx
)
5469 + globals
->root
.sgot
->output_section
->vma
5470 + globals
->root
.sgot
->output_offset
);
5472 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5474 *unresolved_reloc_p
= FALSE
;
5477 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
5478 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
5479 if (globals
->root
.sgot
== NULL
)
5480 return bfd_reloc_notsupported
;
5482 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5483 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5485 *unresolved_reloc_p
= FALSE
;
5488 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12
:
5489 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
:
5490 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC
:
5491 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12
:
5492 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC
:
5493 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12
:
5494 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC
:
5495 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12
:
5496 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC
:
5497 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12
:
5498 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC
:
5499 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0
:
5500 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC
:
5501 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1
:
5502 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC
:
5503 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2
:
5504 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5505 signed_addend
- dtpoff_base (info
),
5509 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
5510 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
5511 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5512 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
5513 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
5514 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
5515 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
5516 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
5517 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5518 signed_addend
- tpoff_base (info
),
5520 *unresolved_reloc_p
= FALSE
;
5523 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5524 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
5525 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5526 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5527 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
5528 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
5529 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5530 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5531 if (globals
->root
.sgot
== NULL
)
5532 return bfd_reloc_notsupported
;
5533 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
5534 + globals
->root
.sgotplt
->output_section
->vma
5535 + globals
->root
.sgotplt
->output_offset
5536 + globals
->sgotplt_jump_table_size
);
5538 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5540 *unresolved_reloc_p
= FALSE
;
5544 return bfd_reloc_notsupported
;
5548 *saved_addend
= value
;
5550 /* Only apply the final relocation in a sequence. */
5552 return bfd_reloc_continue
;
5554 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5558 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5559 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5562 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5563 is to then call final_link_relocate. Return other values in the
5566 static bfd_reloc_status_type
5567 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table
*globals
,
5568 bfd
*input_bfd
, bfd_byte
*contents
,
5569 Elf_Internal_Rela
*rel
, struct elf_link_hash_entry
*h
)
5571 bfd_boolean is_local
= h
== NULL
;
5572 unsigned int r_type
= ELFNN_R_TYPE (rel
->r_info
);
5575 BFD_ASSERT (globals
&& input_bfd
&& contents
&& rel
);
5577 switch (elfNN_aarch64_bfd_reloc_from_type (r_type
))
5579 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5580 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5583 /* GD->LE relaxation:
5584 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
5586 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
5588 bfd_putl32 (0xd2a00000, contents
+ rel
->r_offset
);
5589 return bfd_reloc_continue
;
5593 /* GD->IE relaxation:
5594 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5596 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5598 return bfd_reloc_continue
;
5601 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5605 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5608 /* Tiny TLSDESC->LE relaxation:
5609 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
5610 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
5614 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
5615 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
5617 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5618 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
5619 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5621 bfd_putl32 (0xd2a00000, contents
+ rel
->r_offset
);
5622 bfd_putl32 (0xf2800000, contents
+ rel
->r_offset
+ 4);
5623 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
5624 return bfd_reloc_continue
;
5628 /* Tiny TLSDESC->IE relaxation:
5629 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5630 adr x0, :tlsdesc:var => nop
5634 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
5635 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
5637 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5638 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5640 bfd_putl32 (0x58000000, contents
+ rel
->r_offset
);
5641 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
5642 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
5643 return bfd_reloc_continue
;
5646 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5649 /* Tiny GD->LE relaxation:
5650 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5651 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
5652 nop => add x0, x0, #:tprel_lo12_nc:x
5655 /* First kill the tls_get_addr reloc on the bl instruction. */
5656 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5658 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 0);
5659 bfd_putl32 (0x91400020, contents
+ rel
->r_offset
+ 4);
5660 bfd_putl32 (0x91000000, contents
+ rel
->r_offset
+ 8);
5662 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5663 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
));
5664 rel
[1].r_offset
= rel
->r_offset
+ 8;
5666 /* Move the current relocation to the second instruction in
5669 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5670 AARCH64_R (TLSLE_ADD_TPREL_HI12
));
5671 return bfd_reloc_continue
;
5675 /* Tiny GD->IE relaxation:
5676 adr x0, :tlsgd:var => ldr x0, :gottprel:var
5677 bl __tls_get_addr => mrs x1, tpidr_el0
5678 nop => add x0, x0, x1
5681 /* First kill the tls_get_addr reloc on the bl instruction. */
5682 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5683 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5685 bfd_putl32 (0x58000000, contents
+ rel
->r_offset
);
5686 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
5687 bfd_putl32 (0x8b000020, contents
+ rel
->r_offset
+ 8);
5688 return bfd_reloc_continue
;
5691 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5692 return bfd_reloc_continue
;
5694 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
5697 /* GD->LE relaxation:
5698 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5700 bfd_putl32 (0xf2800000, contents
+ rel
->r_offset
);
5701 return bfd_reloc_continue
;
5705 /* GD->IE relaxation:
5706 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
5708 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5710 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
5711 return bfd_reloc_continue
;
5714 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5717 /* GD->LE relaxation
5718 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
5719 bl __tls_get_addr => mrs x1, tpidr_el0
5720 nop => add x0, x1, x0
5723 /* First kill the tls_get_addr reloc on the bl instruction. */
5724 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5725 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5727 bfd_putl32 (0xf2800000, contents
+ rel
->r_offset
);
5728 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
5729 bfd_putl32 (0x8b000020, contents
+ rel
->r_offset
+ 8);
5730 return bfd_reloc_continue
;
5734 /* GD->IE relaxation
5735 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
5736 BL __tls_get_addr => mrs x1, tpidr_el0
5738 NOP => add x0, x1, x0
5741 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
5743 /* Remove the relocation on the BL instruction. */
5744 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5746 bfd_putl32 (0xf9400000, contents
+ rel
->r_offset
);
5748 /* We choose to fixup the BL and NOP instructions using the
5749 offset from the second relocation to allow flexibility in
5750 scheduling instructions between the ADD and BL. */
5751 bfd_putl32 (0xd53bd041, contents
+ rel
[1].r_offset
);
5752 bfd_putl32 (0x8b000020, contents
+ rel
[1].r_offset
+ 4);
5753 return bfd_reloc_continue
;
5756 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
5757 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5758 /* GD->IE/LE relaxation:
5759 add x0, x0, #:tlsdesc_lo12:var => nop
5762 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
);
5763 return bfd_reloc_ok
;
5765 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5766 /* IE->LE relaxation:
5767 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
5771 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5772 bfd_putl32 (0xd2a00000 | (insn
& 0x1f), contents
+ rel
->r_offset
);
5774 return bfd_reloc_continue
;
5776 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
5777 /* IE->LE relaxation:
5778 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
5782 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5783 bfd_putl32 (0xf2800000 | (insn
& 0x1f), contents
+ rel
->r_offset
);
5785 return bfd_reloc_continue
;
5787 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
5788 /* LD->LE relaxation (tiny):
5789 adr x0, :tlsldm:x => mrs x0, tpidr_el0
5790 bl __tls_get_addr => add x0, x0, TCB_SIZE
5794 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5795 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
5796 /* No need of CALL26 relocation for tls_get_addr. */
5797 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5798 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
+ 0);
5799 bfd_putl32 (0x91004000, contents
+ rel
->r_offset
+ 4);
5800 return bfd_reloc_ok
;
5802 return bfd_reloc_continue
;
5804 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
5805 /* LD->LE relaxation (small):
5806 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
5810 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
);
5811 return bfd_reloc_ok
;
5813 return bfd_reloc_continue
;
5815 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
5816 /* LD->LE relaxation (small):
5817 add x0, #:tlsldm_lo12:x => add x0, x0, TCB_SIZE
5818 bl __tls_get_addr => nop
5822 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5823 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
5824 /* No need of CALL26 relocation for tls_get_addr. */
5825 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5826 bfd_putl32 (0x91004000, contents
+ rel
->r_offset
+ 0);
5827 bfd_putl32 (0xd503201f, contents
+ rel
->r_offset
+ 4);
5828 return bfd_reloc_ok
;
5830 return bfd_reloc_continue
;
5833 return bfd_reloc_continue
;
5836 return bfd_reloc_ok
;
5839 /* Relocate an AArch64 ELF section. */
5842 elfNN_aarch64_relocate_section (bfd
*output_bfd
,
5843 struct bfd_link_info
*info
,
5845 asection
*input_section
,
5847 Elf_Internal_Rela
*relocs
,
5848 Elf_Internal_Sym
*local_syms
,
5849 asection
**local_sections
)
5851 Elf_Internal_Shdr
*symtab_hdr
;
5852 struct elf_link_hash_entry
**sym_hashes
;
5853 Elf_Internal_Rela
*rel
;
5854 Elf_Internal_Rela
*relend
;
5856 struct elf_aarch64_link_hash_table
*globals
;
5857 bfd_boolean save_addend
= FALSE
;
5860 globals
= elf_aarch64_hash_table (info
);
5862 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
5863 sym_hashes
= elf_sym_hashes (input_bfd
);
5866 relend
= relocs
+ input_section
->reloc_count
;
5867 for (; rel
< relend
; rel
++)
5869 unsigned int r_type
;
5870 bfd_reloc_code_real_type bfd_r_type
;
5871 bfd_reloc_code_real_type relaxed_bfd_r_type
;
5872 reloc_howto_type
*howto
;
5873 unsigned long r_symndx
;
5874 Elf_Internal_Sym
*sym
;
5876 struct elf_link_hash_entry
*h
;
5878 bfd_reloc_status_type r
;
5881 bfd_boolean unresolved_reloc
= FALSE
;
5882 char *error_message
= NULL
;
5884 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
5885 r_type
= ELFNN_R_TYPE (rel
->r_info
);
5887 bfd_reloc
.howto
= elfNN_aarch64_howto_from_type (r_type
);
5888 howto
= bfd_reloc
.howto
;
5892 (*_bfd_error_handler
)
5893 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
5894 input_bfd
, input_section
, r_type
);
5897 bfd_r_type
= elfNN_aarch64_bfd_reloc_from_howto (howto
);
5903 if (r_symndx
< symtab_hdr
->sh_info
)
5905 sym
= local_syms
+ r_symndx
;
5906 sym_type
= ELFNN_ST_TYPE (sym
->st_info
);
5907 sec
= local_sections
[r_symndx
];
5909 /* An object file might have a reference to a local
5910 undefined symbol. This is a daft object file, but we
5911 should at least do something about it. */
5912 if (r_type
!= R_AARCH64_NONE
&& r_type
!= R_AARCH64_NULL
5913 && bfd_is_und_section (sec
)
5914 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
5916 if (!info
->callbacks
->undefined_symbol
5917 (info
, bfd_elf_string_from_elf_section
5918 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
5919 input_bfd
, input_section
, rel
->r_offset
, TRUE
))
5923 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
5925 /* Relocate against local STT_GNU_IFUNC symbol. */
5926 if (!bfd_link_relocatable (info
)
5927 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
5929 h
= elfNN_aarch64_get_local_sym_hash (globals
, input_bfd
,
5934 /* Set STT_GNU_IFUNC symbol value. */
5935 h
->root
.u
.def
.value
= sym
->st_value
;
5936 h
->root
.u
.def
.section
= sec
;
5941 bfd_boolean warned
, ignored
;
5943 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
5944 r_symndx
, symtab_hdr
, sym_hashes
,
5946 unresolved_reloc
, warned
, ignored
);
5951 if (sec
!= NULL
&& discarded_section (sec
))
5952 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
5953 rel
, 1, relend
, howto
, 0, contents
);
5955 if (bfd_link_relocatable (info
))
5959 name
= h
->root
.root
.string
;
5962 name
= (bfd_elf_string_from_elf_section
5963 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
5964 if (name
== NULL
|| *name
== '\0')
5965 name
= bfd_section_name (input_bfd
, sec
);
5969 && r_type
!= R_AARCH64_NONE
5970 && r_type
!= R_AARCH64_NULL
5972 || h
->root
.type
== bfd_link_hash_defined
5973 || h
->root
.type
== bfd_link_hash_defweak
)
5974 && IS_AARCH64_TLS_RELOC (bfd_r_type
) != (sym_type
== STT_TLS
))
5976 (*_bfd_error_handler
)
5977 ((sym_type
== STT_TLS
5978 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
5979 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
5981 input_section
, (long) rel
->r_offset
, howto
->name
, name
);
5984 /* We relax only if we can see that there can be a valid transition
5985 from a reloc type to another.
5986 We call elfNN_aarch64_final_link_relocate unless we're completely
5987 done, i.e., the relaxation produced the final output we want. */
5989 relaxed_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
,
5991 if (relaxed_bfd_r_type
!= bfd_r_type
)
5993 bfd_r_type
= relaxed_bfd_r_type
;
5994 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
5995 BFD_ASSERT (howto
!= NULL
);
5996 r_type
= howto
->type
;
5997 r
= elfNN_aarch64_tls_relax (globals
, input_bfd
, contents
, rel
, h
);
5998 unresolved_reloc
= 0;
6001 r
= bfd_reloc_continue
;
6003 /* There may be multiple consecutive relocations for the
6004 same offset. In that case we are supposed to treat the
6005 output of each relocation as the addend for the next. */
6006 if (rel
+ 1 < relend
6007 && rel
->r_offset
== rel
[1].r_offset
6008 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NONE
6009 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NULL
)
6012 save_addend
= FALSE
;
6014 if (r
== bfd_reloc_continue
)
6015 r
= elfNN_aarch64_final_link_relocate (howto
, input_bfd
, output_bfd
,
6016 input_section
, contents
, rel
,
6017 relocation
, info
, sec
,
6018 h
, &unresolved_reloc
,
6019 save_addend
, &addend
, sym
);
6021 switch (elfNN_aarch64_bfd_reloc_from_type (r_type
))
6023 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6024 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6025 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6026 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6027 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6028 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6029 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6030 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6031 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6033 bfd_boolean need_relocs
= FALSE
;
6038 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6039 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6042 (bfd_link_pic (info
) || indx
!= 0) &&
6044 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6045 || h
->root
.type
!= bfd_link_hash_undefweak
);
6047 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6051 Elf_Internal_Rela rela
;
6052 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPMOD
));
6054 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6055 globals
->root
.sgot
->output_offset
+ off
;
6058 loc
= globals
->root
.srelgot
->contents
;
6059 loc
+= globals
->root
.srelgot
->reloc_count
++
6060 * RELOC_SIZE (htab
);
6061 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6063 bfd_reloc_code_real_type real_type
=
6064 elfNN_aarch64_bfd_reloc_from_type (r_type
);
6066 if (real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6067 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6068 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
)
6070 /* For local dynamic, don't generate DTPREL in any case.
6071 Initialize the DTPREL slot into zero, so we get module
6072 base address when invoke runtime TLS resolver. */
6073 bfd_put_NN (output_bfd
, 0,
6074 globals
->root
.sgot
->contents
+ off
6079 bfd_put_NN (output_bfd
,
6080 relocation
- dtpoff_base (info
),
6081 globals
->root
.sgot
->contents
+ off
6086 /* This TLS symbol is global. We emit a
6087 relocation to fixup the tls offset at load
6090 ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPREL
));
6093 (globals
->root
.sgot
->output_section
->vma
6094 + globals
->root
.sgot
->output_offset
+ off
6097 loc
= globals
->root
.srelgot
->contents
;
6098 loc
+= globals
->root
.srelgot
->reloc_count
++
6099 * RELOC_SIZE (globals
);
6100 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6101 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6102 globals
->root
.sgot
->contents
+ off
6108 bfd_put_NN (output_bfd
, (bfd_vma
) 1,
6109 globals
->root
.sgot
->contents
+ off
);
6110 bfd_put_NN (output_bfd
,
6111 relocation
- dtpoff_base (info
),
6112 globals
->root
.sgot
->contents
+ off
6116 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6120 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6121 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6122 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6123 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6125 bfd_boolean need_relocs
= FALSE
;
6130 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6132 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6135 (bfd_link_pic (info
) || indx
!= 0) &&
6137 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6138 || h
->root
.type
!= bfd_link_hash_undefweak
);
6140 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6144 Elf_Internal_Rela rela
;
6147 rela
.r_addend
= relocation
- dtpoff_base (info
);
6151 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_TPREL
));
6152 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6153 globals
->root
.sgot
->output_offset
+ off
;
6155 loc
= globals
->root
.srelgot
->contents
;
6156 loc
+= globals
->root
.srelgot
->reloc_count
++
6157 * RELOC_SIZE (htab
);
6159 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6161 bfd_put_NN (output_bfd
, rela
.r_addend
,
6162 globals
->root
.sgot
->contents
+ off
);
6165 bfd_put_NN (output_bfd
, relocation
- tpoff_base (info
),
6166 globals
->root
.sgot
->contents
+ off
);
6168 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6172 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
6173 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6174 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6175 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
6176 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6177 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6179 bfd_boolean need_relocs
= FALSE
;
6180 int indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6181 bfd_vma off
= symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
);
6183 need_relocs
= (h
== NULL
6184 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6185 || h
->root
.type
!= bfd_link_hash_undefweak
);
6187 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6188 BFD_ASSERT (globals
->root
.sgot
!= NULL
);
6193 Elf_Internal_Rela rela
;
6194 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLSDESC
));
6197 rela
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
6198 + globals
->root
.sgotplt
->output_offset
6199 + off
+ globals
->sgotplt_jump_table_size
);
6202 rela
.r_addend
= relocation
- dtpoff_base (info
);
6204 /* Allocate the next available slot in the PLT reloc
6205 section to hold our R_AARCH64_TLSDESC, the next
6206 available slot is determined from reloc_count,
6207 which we step. But note, reloc_count was
6208 artifically moved down while allocating slots for
6209 real PLT relocs such that all of the PLT relocs
6210 will fit above the initial reloc_count and the
6211 extra stuff will fit below. */
6212 loc
= globals
->root
.srelplt
->contents
;
6213 loc
+= globals
->root
.srelplt
->reloc_count
++
6214 * RELOC_SIZE (globals
);
6216 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6218 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6219 globals
->root
.sgotplt
->contents
+ off
+
6220 globals
->sgotplt_jump_table_size
);
6221 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6222 globals
->root
.sgotplt
->contents
+ off
+
6223 globals
->sgotplt_jump_table_size
+
6227 symbol_tlsdesc_got_offset_mark (input_bfd
, h
, r_symndx
);
6238 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6239 because such sections are not SEC_ALLOC and thus ld.so will
6240 not process them. */
6241 if (unresolved_reloc
6242 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
6244 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
6245 +rel
->r_offset
) != (bfd_vma
) - 1)
6247 (*_bfd_error_handler
)
6249 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6250 input_bfd
, input_section
, (long) rel
->r_offset
, howto
->name
,
6251 h
->root
.root
.string
);
6255 if (r
!= bfd_reloc_ok
&& r
!= bfd_reloc_continue
)
6257 bfd_reloc_code_real_type real_r_type
6258 = elfNN_aarch64_bfd_reloc_from_type (r_type
);
6262 case bfd_reloc_overflow
:
6263 if (!(*info
->callbacks
->reloc_overflow
)
6264 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
, (bfd_vma
) 0,
6265 input_bfd
, input_section
, rel
->r_offset
))
6267 if (real_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
6268 || real_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
6270 (*info
->callbacks
->warning
)
6272 _("Too many GOT entries for -fpic, "
6273 "please recompile with -fPIC"),
6274 name
, input_bfd
, input_section
, rel
->r_offset
);
6279 case bfd_reloc_undefined
:
6280 if (!((*info
->callbacks
->undefined_symbol
)
6281 (info
, name
, input_bfd
, input_section
,
6282 rel
->r_offset
, TRUE
)))
6286 case bfd_reloc_outofrange
:
6287 error_message
= _("out of range");
6290 case bfd_reloc_notsupported
:
6291 error_message
= _("unsupported relocation");
6294 case bfd_reloc_dangerous
:
6295 /* error_message should already be set. */
6299 error_message
= _("unknown error");
6303 BFD_ASSERT (error_message
!= NULL
);
6304 if (!((*info
->callbacks
->reloc_dangerous
)
6305 (info
, error_message
, input_bfd
, input_section
,
6316 /* Set the right machine number. */
6319 elfNN_aarch64_object_p (bfd
*abfd
)
6322 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64_ilp32
);
6324 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64
);
6329 /* Function to keep AArch64 specific flags in the ELF header. */
6332 elfNN_aarch64_set_private_flags (bfd
*abfd
, flagword flags
)
6334 if (elf_flags_init (abfd
) && elf_elfheader (abfd
)->e_flags
!= flags
)
6339 elf_elfheader (abfd
)->e_flags
= flags
;
6340 elf_flags_init (abfd
) = TRUE
;
6346 /* Merge backend specific data from an object file to the output
6347 object file when linking. */
6350 elfNN_aarch64_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
6354 bfd_boolean flags_compatible
= TRUE
;
6357 /* Check if we have the same endianess. */
6358 if (!_bfd_generic_verify_endian_match (ibfd
, obfd
))
6361 if (!is_aarch64_elf (ibfd
) || !is_aarch64_elf (obfd
))
6364 /* The input BFD must have had its flags initialised. */
6365 /* The following seems bogus to me -- The flags are initialized in
6366 the assembler but I don't think an elf_flags_init field is
6367 written into the object. */
6368 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6370 in_flags
= elf_elfheader (ibfd
)->e_flags
;
6371 out_flags
= elf_elfheader (obfd
)->e_flags
;
6373 if (!elf_flags_init (obfd
))
6375 /* If the input is the default architecture and had the default
6376 flags then do not bother setting the flags for the output
6377 architecture, instead allow future merges to do this. If no
6378 future merges ever set these flags then they will retain their
6379 uninitialised values, which surprise surprise, correspond
6380 to the default values. */
6381 if (bfd_get_arch_info (ibfd
)->the_default
6382 && elf_elfheader (ibfd
)->e_flags
== 0)
6385 elf_flags_init (obfd
) = TRUE
;
6386 elf_elfheader (obfd
)->e_flags
= in_flags
;
6388 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
6389 && bfd_get_arch_info (obfd
)->the_default
)
6390 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
6391 bfd_get_mach (ibfd
));
6396 /* Identical flags must be compatible. */
6397 if (in_flags
== out_flags
)
6400 /* Check to see if the input BFD actually contains any sections. If
6401 not, its flags may not have been initialised either, but it
6402 cannot actually cause any incompatiblity. Do not short-circuit
6403 dynamic objects; their section list may be emptied by
6404 elf_link_add_object_symbols.
6406 Also check to see if there are no code sections in the input.
6407 In this case there is no need to check for code specific flags.
6408 XXX - do we need to worry about floating-point format compatability
6409 in data sections ? */
6410 if (!(ibfd
->flags
& DYNAMIC
))
6412 bfd_boolean null_input_bfd
= TRUE
;
6413 bfd_boolean only_data_sections
= TRUE
;
6415 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6417 if ((bfd_get_section_flags (ibfd
, sec
)
6418 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
6419 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
6420 only_data_sections
= FALSE
;
6422 null_input_bfd
= FALSE
;
6426 if (null_input_bfd
|| only_data_sections
)
6430 return flags_compatible
;
6433 /* Display the flags field. */
6436 elfNN_aarch64_print_private_bfd_data (bfd
*abfd
, void *ptr
)
6438 FILE *file
= (FILE *) ptr
;
6439 unsigned long flags
;
6441 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
6443 /* Print normal ELF private data. */
6444 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
6446 flags
= elf_elfheader (abfd
)->e_flags
;
6447 /* Ignore init flag - it may not be set, despite the flags field
6448 containing valid data. */
6450 /* xgettext:c-format */
6451 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
6454 fprintf (file
, _("<Unrecognised flag bits set>"));
6461 /* Update the got entry reference counts for the section being removed. */
6464 elfNN_aarch64_gc_sweep_hook (bfd
*abfd
,
6465 struct bfd_link_info
*info
,
6467 const Elf_Internal_Rela
* relocs
)
6469 struct elf_aarch64_link_hash_table
*htab
;
6470 Elf_Internal_Shdr
*symtab_hdr
;
6471 struct elf_link_hash_entry
**sym_hashes
;
6472 struct elf_aarch64_local_symbol
*locals
;
6473 const Elf_Internal_Rela
*rel
, *relend
;
6475 if (bfd_link_relocatable (info
))
6478 htab
= elf_aarch64_hash_table (info
);
6483 elf_section_data (sec
)->local_dynrel
= NULL
;
6485 symtab_hdr
= &elf_symtab_hdr (abfd
);
6486 sym_hashes
= elf_sym_hashes (abfd
);
6488 locals
= elf_aarch64_locals (abfd
);
6490 relend
= relocs
+ sec
->reloc_count
;
6491 for (rel
= relocs
; rel
< relend
; rel
++)
6493 unsigned long r_symndx
;
6494 unsigned int r_type
;
6495 struct elf_link_hash_entry
*h
= NULL
;
6497 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6499 if (r_symndx
>= symtab_hdr
->sh_info
)
6502 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
6503 while (h
->root
.type
== bfd_link_hash_indirect
6504 || h
->root
.type
== bfd_link_hash_warning
)
6505 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6509 Elf_Internal_Sym
*isym
;
6511 /* A local symbol. */
6512 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
6515 /* Check relocation against local STT_GNU_IFUNC symbol. */
6517 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
6519 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
6527 struct elf_aarch64_link_hash_entry
*eh
;
6528 struct elf_dyn_relocs
**pp
;
6529 struct elf_dyn_relocs
*p
;
6531 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
6533 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
6536 /* Everything must go for SEC. */
6542 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6543 switch (aarch64_tls_transition (abfd
,info
, r_type
, h
,r_symndx
))
6545 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
6546 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
6547 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
6548 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
6549 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
6550 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
6551 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
6552 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
6553 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
6554 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
6555 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6556 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6557 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
6558 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
6559 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6560 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6561 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6562 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6563 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6564 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6565 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6566 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
6567 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
6568 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6569 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6570 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6571 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6574 if (h
->got
.refcount
> 0)
6575 h
->got
.refcount
-= 1;
6577 if (h
->type
== STT_GNU_IFUNC
)
6579 if (h
->plt
.refcount
> 0)
6580 h
->plt
.refcount
-= 1;
6583 else if (locals
!= NULL
)
6585 if (locals
[r_symndx
].got_refcount
> 0)
6586 locals
[r_symndx
].got_refcount
-= 1;
6590 case BFD_RELOC_AARCH64_CALL26
:
6591 case BFD_RELOC_AARCH64_JUMP26
:
6592 /* If this is a local symbol then we resolve it
6593 directly without creating a PLT entry. */
6597 if (h
->plt
.refcount
> 0)
6598 h
->plt
.refcount
-= 1;
6601 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
6602 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
6603 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
6604 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
6605 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
6606 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
6607 case BFD_RELOC_AARCH64_MOVW_G3
:
6608 case BFD_RELOC_AARCH64_NN
:
6609 if (h
!= NULL
&& bfd_link_executable (info
))
6611 if (h
->plt
.refcount
> 0)
6612 h
->plt
.refcount
-= 1;
6624 /* Adjust a symbol defined by a dynamic object and referenced by a
6625 regular object. The current definition is in some section of the
6626 dynamic object, but we're not including those sections. We have to
6627 change the definition to something the rest of the link can
6631 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
6632 struct elf_link_hash_entry
*h
)
6634 struct elf_aarch64_link_hash_table
*htab
;
6637 /* If this is a function, put it in the procedure linkage table. We
6638 will fill in the contents of the procedure linkage table later,
6639 when we know the address of the .got section. */
6640 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
6642 if (h
->plt
.refcount
<= 0
6643 || (h
->type
!= STT_GNU_IFUNC
6644 && (SYMBOL_CALLS_LOCAL (info
, h
)
6645 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
6646 && h
->root
.type
== bfd_link_hash_undefweak
))))
6648 /* This case can occur if we saw a CALL26 reloc in
6649 an input file, but the symbol wasn't referred to
6650 by a dynamic object or all references were
6651 garbage collected. In which case we can end up
6653 h
->plt
.offset
= (bfd_vma
) - 1;
6660 /* Otherwise, reset to -1. */
6661 h
->plt
.offset
= (bfd_vma
) - 1;
6664 /* If this is a weak symbol, and there is a real definition, the
6665 processor independent code will have arranged for us to see the
6666 real definition first, and we can just use the same value. */
6667 if (h
->u
.weakdef
!= NULL
)
6669 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
6670 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
6671 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
6672 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
6673 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
6674 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
6678 /* If we are creating a shared library, we must presume that the
6679 only references to the symbol are via the global offset table.
6680 For such cases we need not do anything here; the relocations will
6681 be handled correctly by relocate_section. */
6682 if (bfd_link_pic (info
))
6685 /* If there are no references to this symbol that do not use the
6686 GOT, we don't need to generate a copy reloc. */
6687 if (!h
->non_got_ref
)
6690 /* If -z nocopyreloc was given, we won't generate them either. */
6691 if (info
->nocopyreloc
)
6697 /* We must allocate the symbol in our .dynbss section, which will
6698 become part of the .bss section of the executable. There will be
6699 an entry for this symbol in the .dynsym section. The dynamic
6700 object will contain position independent code, so all references
6701 from the dynamic object to this symbol will go through the global
6702 offset table. The dynamic linker will use the .dynsym entry to
6703 determine the address it must put in the global offset table, so
6704 both the dynamic object and the regular object will refer to the
6705 same memory location for the variable. */
6707 htab
= elf_aarch64_hash_table (info
);
6709 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
6710 to copy the initial value out of the dynamic object and into the
6711 runtime process image. */
6712 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
6714 htab
->srelbss
->size
+= RELOC_SIZE (htab
);
6720 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
6725 elfNN_aarch64_allocate_local_symbols (bfd
*abfd
, unsigned number
)
6727 struct elf_aarch64_local_symbol
*locals
;
6728 locals
= elf_aarch64_locals (abfd
);
6731 locals
= (struct elf_aarch64_local_symbol
*)
6732 bfd_zalloc (abfd
, number
* sizeof (struct elf_aarch64_local_symbol
));
6735 elf_aarch64_locals (abfd
) = locals
;
6740 /* Create the .got section to hold the global offset table. */
6743 aarch64_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
6745 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6748 struct elf_link_hash_entry
*h
;
6749 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
6751 /* This function may be called more than once. */
6752 s
= bfd_get_linker_section (abfd
, ".got");
6756 flags
= bed
->dynamic_sec_flags
;
6758 s
= bfd_make_section_anyway_with_flags (abfd
,
6759 (bed
->rela_plts_and_copies_p
6760 ? ".rela.got" : ".rel.got"),
6761 (bed
->dynamic_sec_flags
6764 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
6768 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
6770 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
6773 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
6775 if (bed
->want_got_sym
)
6777 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
6778 (or .got.plt) section. We don't do this in the linker script
6779 because we don't want to define the symbol if we are not creating
6780 a global offset table. */
6781 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
6782 "_GLOBAL_OFFSET_TABLE_");
6783 elf_hash_table (info
)->hgot
= h
;
6788 if (bed
->want_got_plt
)
6790 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
6792 || !bfd_set_section_alignment (abfd
, s
,
6793 bed
->s
->log_file_align
))
6798 /* The first bit of the global offset table is the header. */
6799 s
->size
+= bed
->got_header_size
;
6804 /* Look through the relocs for a section during the first phase. */
6807 elfNN_aarch64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
6808 asection
*sec
, const Elf_Internal_Rela
*relocs
)
6810 Elf_Internal_Shdr
*symtab_hdr
;
6811 struct elf_link_hash_entry
**sym_hashes
;
6812 const Elf_Internal_Rela
*rel
;
6813 const Elf_Internal_Rela
*rel_end
;
6816 struct elf_aarch64_link_hash_table
*htab
;
6818 if (bfd_link_relocatable (info
))
6821 BFD_ASSERT (is_aarch64_elf (abfd
));
6823 htab
= elf_aarch64_hash_table (info
);
6826 symtab_hdr
= &elf_symtab_hdr (abfd
);
6827 sym_hashes
= elf_sym_hashes (abfd
);
6829 rel_end
= relocs
+ sec
->reloc_count
;
6830 for (rel
= relocs
; rel
< rel_end
; rel
++)
6832 struct elf_link_hash_entry
*h
;
6833 unsigned long r_symndx
;
6834 unsigned int r_type
;
6835 bfd_reloc_code_real_type bfd_r_type
;
6836 Elf_Internal_Sym
*isym
;
6838 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6839 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6841 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
6843 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
6848 if (r_symndx
< symtab_hdr
->sh_info
)
6850 /* A local symbol. */
6851 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
6856 /* Check relocation against local STT_GNU_IFUNC symbol. */
6857 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
6859 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
,
6864 /* Fake a STT_GNU_IFUNC symbol. */
6865 h
->type
= STT_GNU_IFUNC
;
6868 h
->forced_local
= 1;
6869 h
->root
.type
= bfd_link_hash_defined
;
6876 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
6877 while (h
->root
.type
== bfd_link_hash_indirect
6878 || h
->root
.type
== bfd_link_hash_warning
)
6879 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6881 /* PR15323, ref flags aren't set for references in the same
6883 h
->root
.non_ir_ref
= 1;
6886 /* Could be done earlier, if h were already available. */
6887 bfd_r_type
= aarch64_tls_transition (abfd
, info
, r_type
, h
, r_symndx
);
6891 /* Create the ifunc sections for static executables. If we
6892 never see an indirect function symbol nor we are building
6893 a static executable, those sections will be empty and
6894 won't appear in output. */
6900 case BFD_RELOC_AARCH64_ADD_LO12
:
6901 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
6902 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
6903 case BFD_RELOC_AARCH64_CALL26
:
6904 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
6905 case BFD_RELOC_AARCH64_JUMP26
:
6906 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
6907 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
6908 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
6909 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
6910 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
6911 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
6912 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
6913 case BFD_RELOC_AARCH64_NN
:
6914 if (htab
->root
.dynobj
== NULL
)
6915 htab
->root
.dynobj
= abfd
;
6916 if (!_bfd_elf_create_ifunc_sections (htab
->root
.dynobj
, info
))
6921 /* It is referenced by a non-shared object. */
6923 h
->root
.non_ir_ref
= 1;
6928 case BFD_RELOC_AARCH64_NN
:
6930 /* We don't need to handle relocs into sections not going into
6931 the "real" output. */
6932 if ((sec
->flags
& SEC_ALLOC
) == 0)
6937 if (!bfd_link_pic (info
))
6940 h
->plt
.refcount
+= 1;
6941 h
->pointer_equality_needed
= 1;
6944 /* No need to do anything if we're not creating a shared
6946 if (! bfd_link_pic (info
))
6950 struct elf_dyn_relocs
*p
;
6951 struct elf_dyn_relocs
**head
;
6953 /* We must copy these reloc types into the output file.
6954 Create a reloc section in dynobj and make room for
6958 if (htab
->root
.dynobj
== NULL
)
6959 htab
->root
.dynobj
= abfd
;
6961 sreloc
= _bfd_elf_make_dynamic_reloc_section
6962 (sec
, htab
->root
.dynobj
, LOG_FILE_ALIGN
, abfd
, /*rela? */ TRUE
);
6968 /* If this is a global symbol, we count the number of
6969 relocations we need for this symbol. */
6972 struct elf_aarch64_link_hash_entry
*eh
;
6973 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
6974 head
= &eh
->dyn_relocs
;
6978 /* Track dynamic relocs needed for local syms too.
6979 We really need local syms available to do this
6985 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
6990 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
6994 /* Beware of type punned pointers vs strict aliasing
6996 vpp
= &(elf_section_data (s
)->local_dynrel
);
6997 head
= (struct elf_dyn_relocs
**) vpp
;
7001 if (p
== NULL
|| p
->sec
!= sec
)
7003 bfd_size_type amt
= sizeof *p
;
7004 p
= ((struct elf_dyn_relocs
*)
7005 bfd_zalloc (htab
->root
.dynobj
, amt
));
7018 /* RR: We probably want to keep a consistency check that
7019 there are no dangling GOT_PAGE relocs. */
7020 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7021 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7022 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7023 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7024 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7025 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7026 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7027 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7028 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7029 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC
:
7030 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7031 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7032 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
7033 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC
:
7034 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7035 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
7036 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
7037 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
7038 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
7039 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
7040 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
7041 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
7042 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
7043 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
7044 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
7045 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
7046 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
7049 unsigned old_got_type
;
7051 got_type
= aarch64_reloc_got_type (bfd_r_type
);
7055 h
->got
.refcount
+= 1;
7056 old_got_type
= elf_aarch64_hash_entry (h
)->got_type
;
7060 struct elf_aarch64_local_symbol
*locals
;
7062 if (!elfNN_aarch64_allocate_local_symbols
7063 (abfd
, symtab_hdr
->sh_info
))
7066 locals
= elf_aarch64_locals (abfd
);
7067 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7068 locals
[r_symndx
].got_refcount
+= 1;
7069 old_got_type
= locals
[r_symndx
].got_type
;
7072 /* If a variable is accessed with both general dynamic TLS
7073 methods, two slots may be created. */
7074 if (GOT_TLS_GD_ANY_P (old_got_type
) && GOT_TLS_GD_ANY_P (got_type
))
7075 got_type
|= old_got_type
;
7077 /* We will already have issued an error message if there
7078 is a TLS/non-TLS mismatch, based on the symbol type.
7079 So just combine any TLS types needed. */
7080 if (old_got_type
!= GOT_UNKNOWN
&& old_got_type
!= GOT_NORMAL
7081 && got_type
!= GOT_NORMAL
)
7082 got_type
|= old_got_type
;
7084 /* If the symbol is accessed by both IE and GD methods, we
7085 are able to relax. Turn off the GD flag, without
7086 messing up with any other kind of TLS types that may be
7088 if ((got_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (got_type
))
7089 got_type
&= ~ (GOT_TLSDESC_GD
| GOT_TLS_GD
);
7091 if (old_got_type
!= got_type
)
7094 elf_aarch64_hash_entry (h
)->got_type
= got_type
;
7097 struct elf_aarch64_local_symbol
*locals
;
7098 locals
= elf_aarch64_locals (abfd
);
7099 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7100 locals
[r_symndx
].got_type
= got_type
;
7104 if (htab
->root
.dynobj
== NULL
)
7105 htab
->root
.dynobj
= abfd
;
7106 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7111 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
7112 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
7113 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
7114 case BFD_RELOC_AARCH64_MOVW_G3
:
7115 if (bfd_link_pic (info
))
7117 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7118 (*_bfd_error_handler
)
7119 (_("%B: relocation %s against `%s' can not be used when making "
7120 "a shared object; recompile with -fPIC"),
7121 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7122 (h
) ? h
->root
.root
.string
: "a local symbol");
7123 bfd_set_error (bfd_error_bad_value
);
7127 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
7128 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7129 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
7130 if (h
!= NULL
&& bfd_link_executable (info
))
7132 /* If this reloc is in a read-only section, we might
7133 need a copy reloc. We can't check reliably at this
7134 stage whether the section is read-only, as input
7135 sections have not yet been mapped to output sections.
7136 Tentatively set the flag for now, and correct in
7137 adjust_dynamic_symbol. */
7139 h
->plt
.refcount
+= 1;
7140 h
->pointer_equality_needed
= 1;
7142 /* FIXME:: RR need to handle these in shared libraries
7143 and essentially bomb out as these being non-PIC
7144 relocations in shared libraries. */
7147 case BFD_RELOC_AARCH64_CALL26
:
7148 case BFD_RELOC_AARCH64_JUMP26
:
7149 /* If this is a local symbol then we resolve it
7150 directly without creating a PLT entry. */
7155 if (h
->plt
.refcount
<= 0)
7156 h
->plt
.refcount
= 1;
7158 h
->plt
.refcount
+= 1;
7169 /* Treat mapping symbols as special target symbols. */
7172 elfNN_aarch64_is_target_special_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
7175 return bfd_is_aarch64_special_symbol_name (sym
->name
,
7176 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
);
7179 /* This is a copy of elf_find_function () from elf.c except that
7180 AArch64 mapping symbols are ignored when looking for function names. */
7183 aarch64_elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
7187 const char **filename_ptr
,
7188 const char **functionname_ptr
)
7190 const char *filename
= NULL
;
7191 asymbol
*func
= NULL
;
7192 bfd_vma low_func
= 0;
7195 for (p
= symbols
; *p
!= NULL
; p
++)
7199 q
= (elf_symbol_type
*) * p
;
7201 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
7206 filename
= bfd_asymbol_name (&q
->symbol
);
7210 /* Skip mapping symbols. */
7211 if ((q
->symbol
.flags
& BSF_LOCAL
)
7212 && (bfd_is_aarch64_special_symbol_name
7213 (q
->symbol
.name
, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
)))
7216 if (bfd_get_section (&q
->symbol
) == section
7217 && q
->symbol
.value
>= low_func
&& q
->symbol
.value
<= offset
)
7219 func
= (asymbol
*) q
;
7220 low_func
= q
->symbol
.value
;
7230 *filename_ptr
= filename
;
7231 if (functionname_ptr
)
7232 *functionname_ptr
= bfd_asymbol_name (func
);
7238 /* Find the nearest line to a particular section and offset, for error
7239 reporting. This code is a duplicate of the code in elf.c, except
7240 that it uses aarch64_elf_find_function. */
7243 elfNN_aarch64_find_nearest_line (bfd
*abfd
,
7247 const char **filename_ptr
,
7248 const char **functionname_ptr
,
7249 unsigned int *line_ptr
,
7250 unsigned int *discriminator_ptr
)
7252 bfd_boolean found
= FALSE
;
7254 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
7255 filename_ptr
, functionname_ptr
,
7256 line_ptr
, discriminator_ptr
,
7257 dwarf_debug_sections
, 0,
7258 &elf_tdata (abfd
)->dwarf2_find_line_info
))
7260 if (!*functionname_ptr
)
7261 aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
7262 *filename_ptr
? NULL
: filename_ptr
,
7268 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
7269 toolchain uses DWARF1. */
7271 if (!_bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
7272 &found
, filename_ptr
,
7273 functionname_ptr
, line_ptr
,
7274 &elf_tdata (abfd
)->line_info
))
7277 if (found
&& (*functionname_ptr
|| *line_ptr
))
7280 if (symbols
== NULL
)
7283 if (!aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
7284 filename_ptr
, functionname_ptr
))
7292 elfNN_aarch64_find_inliner_info (bfd
*abfd
,
7293 const char **filename_ptr
,
7294 const char **functionname_ptr
,
7295 unsigned int *line_ptr
)
7298 found
= _bfd_dwarf2_find_inliner_info
7299 (abfd
, filename_ptr
,
7300 functionname_ptr
, line_ptr
, &elf_tdata (abfd
)->dwarf2_find_line_info
);
7306 elfNN_aarch64_post_process_headers (bfd
*abfd
,
7307 struct bfd_link_info
*link_info
)
7309 Elf_Internal_Ehdr
*i_ehdrp
; /* ELF file header, internal form. */
7311 i_ehdrp
= elf_elfheader (abfd
);
7312 i_ehdrp
->e_ident
[EI_ABIVERSION
] = AARCH64_ELF_ABI_VERSION
;
7314 _bfd_elf_post_process_headers (abfd
, link_info
);
7317 static enum elf_reloc_type_class
7318 elfNN_aarch64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7319 const asection
*rel_sec ATTRIBUTE_UNUSED
,
7320 const Elf_Internal_Rela
*rela
)
7322 switch ((int) ELFNN_R_TYPE (rela
->r_info
))
7324 case AARCH64_R (RELATIVE
):
7325 return reloc_class_relative
;
7326 case AARCH64_R (JUMP_SLOT
):
7327 return reloc_class_plt
;
7328 case AARCH64_R (COPY
):
7329 return reloc_class_copy
;
7331 return reloc_class_normal
;
7335 /* Handle an AArch64 specific section when reading an object file. This is
7336 called when bfd_section_from_shdr finds a section with an unknown
7340 elfNN_aarch64_section_from_shdr (bfd
*abfd
,
7341 Elf_Internal_Shdr
*hdr
,
7342 const char *name
, int shindex
)
7344 /* There ought to be a place to keep ELF backend specific flags, but
7345 at the moment there isn't one. We just keep track of the
7346 sections by their name, instead. Fortunately, the ABI gives
7347 names for all the AArch64 specific sections, so we will probably get
7349 switch (hdr
->sh_type
)
7351 case SHT_AARCH64_ATTRIBUTES
:
7358 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
7364 /* A structure used to record a list of sections, independently
7365 of the next and prev fields in the asection structure. */
7366 typedef struct section_list
7369 struct section_list
*next
;
7370 struct section_list
*prev
;
7374 /* Unfortunately we need to keep a list of sections for which
7375 an _aarch64_elf_section_data structure has been allocated. This
7376 is because it is possible for functions like elfNN_aarch64_write_section
7377 to be called on a section which has had an elf_data_structure
7378 allocated for it (and so the used_by_bfd field is valid) but
7379 for which the AArch64 extended version of this structure - the
7380 _aarch64_elf_section_data structure - has not been allocated. */
7381 static section_list
*sections_with_aarch64_elf_section_data
= NULL
;
7384 record_section_with_aarch64_elf_section_data (asection
*sec
)
7386 struct section_list
*entry
;
7388 entry
= bfd_malloc (sizeof (*entry
));
7392 entry
->next
= sections_with_aarch64_elf_section_data
;
7394 if (entry
->next
!= NULL
)
7395 entry
->next
->prev
= entry
;
7396 sections_with_aarch64_elf_section_data
= entry
;
7399 static struct section_list
*
7400 find_aarch64_elf_section_entry (asection
*sec
)
7402 struct section_list
*entry
;
7403 static struct section_list
*last_entry
= NULL
;
7405 /* This is a short cut for the typical case where the sections are added
7406 to the sections_with_aarch64_elf_section_data list in forward order and
7407 then looked up here in backwards order. This makes a real difference
7408 to the ld-srec/sec64k.exp linker test. */
7409 entry
= sections_with_aarch64_elf_section_data
;
7410 if (last_entry
!= NULL
)
7412 if (last_entry
->sec
== sec
)
7414 else if (last_entry
->next
!= NULL
&& last_entry
->next
->sec
== sec
)
7415 entry
= last_entry
->next
;
7418 for (; entry
; entry
= entry
->next
)
7419 if (entry
->sec
== sec
)
7423 /* Record the entry prior to this one - it is the entry we are
7424 most likely to want to locate next time. Also this way if we
7425 have been called from
7426 unrecord_section_with_aarch64_elf_section_data () we will not
7427 be caching a pointer that is about to be freed. */
7428 last_entry
= entry
->prev
;
7434 unrecord_section_with_aarch64_elf_section_data (asection
*sec
)
7436 struct section_list
*entry
;
7438 entry
= find_aarch64_elf_section_entry (sec
);
7442 if (entry
->prev
!= NULL
)
7443 entry
->prev
->next
= entry
->next
;
7444 if (entry
->next
!= NULL
)
7445 entry
->next
->prev
= entry
->prev
;
7446 if (entry
== sections_with_aarch64_elf_section_data
)
7447 sections_with_aarch64_elf_section_data
= entry
->next
;
7456 struct bfd_link_info
*info
;
7459 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
7460 asection
*, struct elf_link_hash_entry
*);
7461 } output_arch_syminfo
;
7463 enum map_symbol_type
7470 /* Output a single mapping symbol. */
7473 elfNN_aarch64_output_map_sym (output_arch_syminfo
*osi
,
7474 enum map_symbol_type type
, bfd_vma offset
)
7476 static const char *names
[2] = { "$x", "$d" };
7477 Elf_Internal_Sym sym
;
7479 sym
.st_value
= (osi
->sec
->output_section
->vma
7480 + osi
->sec
->output_offset
+ offset
);
7483 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
7484 sym
.st_shndx
= osi
->sec_shndx
;
7485 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
7488 /* Output a single local symbol for a generated stub. */
7491 elfNN_aarch64_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
7492 bfd_vma offset
, bfd_vma size
)
7494 Elf_Internal_Sym sym
;
7496 sym
.st_value
= (osi
->sec
->output_section
->vma
7497 + osi
->sec
->output_offset
+ offset
);
7500 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7501 sym
.st_shndx
= osi
->sec_shndx
;
7502 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
7506 aarch64_map_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
7508 struct elf_aarch64_stub_hash_entry
*stub_entry
;
7512 output_arch_syminfo
*osi
;
7514 /* Massage our args to the form they really have. */
7515 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
7516 osi
= (output_arch_syminfo
*) in_arg
;
7518 stub_sec
= stub_entry
->stub_sec
;
7520 /* Ensure this stub is attached to the current section being
7522 if (stub_sec
!= osi
->sec
)
7525 addr
= (bfd_vma
) stub_entry
->stub_offset
;
7527 stub_name
= stub_entry
->output_name
;
7529 switch (stub_entry
->stub_type
)
7531 case aarch64_stub_adrp_branch
:
7532 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7533 sizeof (aarch64_adrp_branch_stub
)))
7535 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7538 case aarch64_stub_long_branch
:
7539 if (!elfNN_aarch64_output_stub_sym
7540 (osi
, stub_name
, addr
, sizeof (aarch64_long_branch_stub
)))
7542 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7544 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_DATA
, addr
+ 16))
7547 case aarch64_stub_erratum_835769_veneer
:
7548 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7549 sizeof (aarch64_erratum_835769_stub
)))
7551 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7554 case aarch64_stub_erratum_843419_veneer
:
7555 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7556 sizeof (aarch64_erratum_843419_stub
)))
7558 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7569 /* Output mapping symbols for linker generated sections. */
7572 elfNN_aarch64_output_arch_local_syms (bfd
*output_bfd
,
7573 struct bfd_link_info
*info
,
7575 int (*func
) (void *, const char *,
7578 struct elf_link_hash_entry
7581 output_arch_syminfo osi
;
7582 struct elf_aarch64_link_hash_table
*htab
;
7584 htab
= elf_aarch64_hash_table (info
);
7590 /* Long calls stubs. */
7591 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
7595 for (stub_sec
= htab
->stub_bfd
->sections
;
7596 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
7598 /* Ignore non-stub sections. */
7599 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
7604 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
7605 (output_bfd
, osi
.sec
->output_section
);
7607 /* The first instruction in a stub is always a branch. */
7608 if (!elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0))
7611 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_map_one_stub
,
7616 /* Finally, output mapping symbols for the PLT. */
7617 if (!htab
->root
.splt
|| htab
->root
.splt
->size
== 0)
7620 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
7621 (output_bfd
, htab
->root
.splt
->output_section
);
7622 osi
.sec
= htab
->root
.splt
;
7624 elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0);
7630 /* Allocate target specific section data. */
7633 elfNN_aarch64_new_section_hook (bfd
*abfd
, asection
*sec
)
7635 if (!sec
->used_by_bfd
)
7637 _aarch64_elf_section_data
*sdata
;
7638 bfd_size_type amt
= sizeof (*sdata
);
7640 sdata
= bfd_zalloc (abfd
, amt
);
7643 sec
->used_by_bfd
= sdata
;
7646 record_section_with_aarch64_elf_section_data (sec
);
7648 return _bfd_elf_new_section_hook (abfd
, sec
);
7653 unrecord_section_via_map_over_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
7655 void *ignore ATTRIBUTE_UNUSED
)
7657 unrecord_section_with_aarch64_elf_section_data (sec
);
7661 elfNN_aarch64_close_and_cleanup (bfd
*abfd
)
7664 bfd_map_over_sections (abfd
,
7665 unrecord_section_via_map_over_sections
, NULL
);
7667 return _bfd_elf_close_and_cleanup (abfd
);
7671 elfNN_aarch64_bfd_free_cached_info (bfd
*abfd
)
7674 bfd_map_over_sections (abfd
,
7675 unrecord_section_via_map_over_sections
, NULL
);
7677 return _bfd_free_cached_info (abfd
);
7680 /* Create dynamic sections. This is different from the ARM backend in that
7681 the got, plt, gotplt and their relocation sections are all created in the
7682 standard part of the bfd elf backend. */
7685 elfNN_aarch64_create_dynamic_sections (bfd
*dynobj
,
7686 struct bfd_link_info
*info
)
7688 struct elf_aarch64_link_hash_table
*htab
;
7690 /* We need to create .got section. */
7691 if (!aarch64_elf_create_got_section (dynobj
, info
))
7694 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
7697 htab
= elf_aarch64_hash_table (info
);
7698 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
7699 if (!bfd_link_pic (info
))
7700 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
7702 if (!htab
->sdynbss
|| (!bfd_link_pic (info
) && !htab
->srelbss
))
7709 /* Allocate space in .plt, .got and associated reloc sections for
7713 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
7715 struct bfd_link_info
*info
;
7716 struct elf_aarch64_link_hash_table
*htab
;
7717 struct elf_aarch64_link_hash_entry
*eh
;
7718 struct elf_dyn_relocs
*p
;
7720 /* An example of a bfd_link_hash_indirect symbol is versioned
7721 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7722 -> __gxx_personality_v0(bfd_link_hash_defined)
7724 There is no need to process bfd_link_hash_indirect symbols here
7725 because we will also be presented with the concrete instance of
7726 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7727 called to copy all relevant data from the generic to the concrete
7730 if (h
->root
.type
== bfd_link_hash_indirect
)
7733 if (h
->root
.type
== bfd_link_hash_warning
)
7734 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7736 info
= (struct bfd_link_info
*) inf
;
7737 htab
= elf_aarch64_hash_table (info
);
7739 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7740 here if it is defined and referenced in a non-shared object. */
7741 if (h
->type
== STT_GNU_IFUNC
7744 else if (htab
->root
.dynamic_sections_created
&& h
->plt
.refcount
> 0)
7746 /* Make sure this symbol is output as a dynamic symbol.
7747 Undefined weak syms won't yet be marked as dynamic. */
7748 if (h
->dynindx
== -1 && !h
->forced_local
)
7750 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
7754 if (bfd_link_pic (info
) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
7756 asection
*s
= htab
->root
.splt
;
7758 /* If this is the first .plt entry, make room for the special
7761 s
->size
+= htab
->plt_header_size
;
7763 h
->plt
.offset
= s
->size
;
7765 /* If this symbol is not defined in a regular file, and we are
7766 not generating a shared library, then set the symbol to this
7767 location in the .plt. This is required to make function
7768 pointers compare as equal between the normal executable and
7769 the shared library. */
7770 if (!bfd_link_pic (info
) && !h
->def_regular
)
7772 h
->root
.u
.def
.section
= s
;
7773 h
->root
.u
.def
.value
= h
->plt
.offset
;
7776 /* Make room for this entry. For now we only create the
7777 small model PLT entries. We later need to find a way
7778 of relaxing into these from the large model PLT entries. */
7779 s
->size
+= PLT_SMALL_ENTRY_SIZE
;
7781 /* We also need to make an entry in the .got.plt section, which
7782 will be placed in the .got section by the linker script. */
7783 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
7785 /* We also need to make an entry in the .rela.plt section. */
7786 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
7788 /* We need to ensure that all GOT entries that serve the PLT
7789 are consecutive with the special GOT slots [0] [1] and
7790 [2]. Any addtional relocations, such as
7791 R_AARCH64_TLSDESC, must be placed after the PLT related
7792 entries. We abuse the reloc_count such that during
7793 sizing we adjust reloc_count to indicate the number of
7794 PLT related reserved entries. In subsequent phases when
7795 filling in the contents of the reloc entries, PLT related
7796 entries are placed by computing their PLT index (0
7797 .. reloc_count). While other none PLT relocs are placed
7798 at the slot indicated by reloc_count and reloc_count is
7801 htab
->root
.srelplt
->reloc_count
++;
7805 h
->plt
.offset
= (bfd_vma
) - 1;
7811 h
->plt
.offset
= (bfd_vma
) - 1;
7815 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
7816 eh
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
7818 if (h
->got
.refcount
> 0)
7821 unsigned got_type
= elf_aarch64_hash_entry (h
)->got_type
;
7823 h
->got
.offset
= (bfd_vma
) - 1;
7825 dyn
= htab
->root
.dynamic_sections_created
;
7827 /* Make sure this symbol is output as a dynamic symbol.
7828 Undefined weak syms won't yet be marked as dynamic. */
7829 if (dyn
&& h
->dynindx
== -1 && !h
->forced_local
)
7831 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
7835 if (got_type
== GOT_UNKNOWN
)
7838 else if (got_type
== GOT_NORMAL
)
7840 h
->got
.offset
= htab
->root
.sgot
->size
;
7841 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
7842 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
7843 || h
->root
.type
!= bfd_link_hash_undefweak
)
7844 && (bfd_link_pic (info
)
7845 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
7847 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
7853 if (got_type
& GOT_TLSDESC_GD
)
7855 eh
->tlsdesc_got_jump_table_offset
=
7856 (htab
->root
.sgotplt
->size
7857 - aarch64_compute_jump_table_size (htab
));
7858 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
7859 h
->got
.offset
= (bfd_vma
) - 2;
7862 if (got_type
& GOT_TLS_GD
)
7864 h
->got
.offset
= htab
->root
.sgot
->size
;
7865 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
7868 if (got_type
& GOT_TLS_IE
)
7870 h
->got
.offset
= htab
->root
.sgot
->size
;
7871 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
7874 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
7875 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
7876 || h
->root
.type
!= bfd_link_hash_undefweak
)
7877 && (bfd_link_pic (info
)
7879 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
7881 if (got_type
& GOT_TLSDESC_GD
)
7883 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
7884 /* Note reloc_count not incremented here! We have
7885 already adjusted reloc_count for this relocation
7888 /* TLSDESC PLT is now needed, but not yet determined. */
7889 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
7892 if (got_type
& GOT_TLS_GD
)
7893 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
7895 if (got_type
& GOT_TLS_IE
)
7896 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
7902 h
->got
.offset
= (bfd_vma
) - 1;
7905 if (eh
->dyn_relocs
== NULL
)
7908 /* In the shared -Bsymbolic case, discard space allocated for
7909 dynamic pc-relative relocs against symbols which turn out to be
7910 defined in regular objects. For the normal shared case, discard
7911 space for pc-relative relocs that have become local due to symbol
7912 visibility changes. */
7914 if (bfd_link_pic (info
))
7916 /* Relocs that use pc_count are those that appear on a call
7917 insn, or certain REL relocs that can generated via assembly.
7918 We want calls to protected symbols to resolve directly to the
7919 function rather than going via the plt. If people want
7920 function pointer comparisons to work as expected then they
7921 should avoid writing weird assembly. */
7922 if (SYMBOL_CALLS_LOCAL (info
, h
))
7924 struct elf_dyn_relocs
**pp
;
7926 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
;)
7928 p
->count
-= p
->pc_count
;
7937 /* Also discard relocs on undefined weak syms with non-default
7939 if (eh
->dyn_relocs
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
7941 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
7942 eh
->dyn_relocs
= NULL
;
7944 /* Make sure undefined weak symbols are output as a dynamic
7946 else if (h
->dynindx
== -1
7948 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
7953 else if (ELIMINATE_COPY_RELOCS
)
7955 /* For the non-shared case, discard space for relocs against
7956 symbols which turn out to need copy relocs or are not
7962 || (htab
->root
.dynamic_sections_created
7963 && (h
->root
.type
== bfd_link_hash_undefweak
7964 || h
->root
.type
== bfd_link_hash_undefined
))))
7966 /* Make sure this symbol is output as a dynamic symbol.
7967 Undefined weak syms won't yet be marked as dynamic. */
7968 if (h
->dynindx
== -1
7970 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
7973 /* If that succeeded, we know we'll be keeping all the
7975 if (h
->dynindx
!= -1)
7979 eh
->dyn_relocs
= NULL
;
7984 /* Finally, allocate space. */
7985 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
7989 sreloc
= elf_section_data (p
->sec
)->sreloc
;
7991 BFD_ASSERT (sreloc
!= NULL
);
7993 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
7999 /* Allocate space in .plt, .got and associated reloc sections for
8000 ifunc dynamic relocs. */
8003 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
8006 struct bfd_link_info
*info
;
8007 struct elf_aarch64_link_hash_table
*htab
;
8008 struct elf_aarch64_link_hash_entry
*eh
;
8010 /* An example of a bfd_link_hash_indirect symbol is versioned
8011 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8012 -> __gxx_personality_v0(bfd_link_hash_defined)
8014 There is no need to process bfd_link_hash_indirect symbols here
8015 because we will also be presented with the concrete instance of
8016 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8017 called to copy all relevant data from the generic to the concrete
8020 if (h
->root
.type
== bfd_link_hash_indirect
)
8023 if (h
->root
.type
== bfd_link_hash_warning
)
8024 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8026 info
= (struct bfd_link_info
*) inf
;
8027 htab
= elf_aarch64_hash_table (info
);
8029 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8031 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8032 here if it is defined and referenced in a non-shared object. */
8033 if (h
->type
== STT_GNU_IFUNC
8035 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
8037 htab
->plt_entry_size
,
8038 htab
->plt_header_size
,
8043 /* Allocate space in .plt, .got and associated reloc sections for
8044 local dynamic relocs. */
8047 elfNN_aarch64_allocate_local_dynrelocs (void **slot
, void *inf
)
8049 struct elf_link_hash_entry
*h
8050 = (struct elf_link_hash_entry
*) *slot
;
8052 if (h
->type
!= STT_GNU_IFUNC
8056 || h
->root
.type
!= bfd_link_hash_defined
)
8059 return elfNN_aarch64_allocate_dynrelocs (h
, inf
);
8062 /* Allocate space in .plt, .got and associated reloc sections for
8063 local ifunc dynamic relocs. */
8066 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
8068 struct elf_link_hash_entry
*h
8069 = (struct elf_link_hash_entry
*) *slot
;
8071 if (h
->type
!= STT_GNU_IFUNC
8075 || h
->root
.type
!= bfd_link_hash_defined
)
8078 return elfNN_aarch64_allocate_ifunc_dynrelocs (h
, inf
);
8081 /* Find any dynamic relocs that apply to read-only sections. */
8084 aarch64_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
8086 struct elf_aarch64_link_hash_entry
* eh
;
8087 struct elf_dyn_relocs
* p
;
8089 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8090 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
8092 asection
*s
= p
->sec
;
8094 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
8096 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
8098 info
->flags
|= DF_TEXTREL
;
8100 /* Not an error, just cut short the traversal. */
8107 /* This is the most important function of all . Innocuosly named
8110 elfNN_aarch64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
8111 struct bfd_link_info
*info
)
8113 struct elf_aarch64_link_hash_table
*htab
;
8119 htab
= elf_aarch64_hash_table ((info
));
8120 dynobj
= htab
->root
.dynobj
;
8122 BFD_ASSERT (dynobj
!= NULL
);
8124 if (htab
->root
.dynamic_sections_created
)
8126 if (bfd_link_executable (info
) && !info
->nointerp
)
8128 s
= bfd_get_linker_section (dynobj
, ".interp");
8131 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
8132 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
8136 /* Set up .got offsets for local syms, and space for local dynamic
8138 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8140 struct elf_aarch64_local_symbol
*locals
= NULL
;
8141 Elf_Internal_Shdr
*symtab_hdr
;
8145 if (!is_aarch64_elf (ibfd
))
8148 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
8150 struct elf_dyn_relocs
*p
;
8152 for (p
= (struct elf_dyn_relocs
*)
8153 (elf_section_data (s
)->local_dynrel
); p
!= NULL
; p
= p
->next
)
8155 if (!bfd_is_abs_section (p
->sec
)
8156 && bfd_is_abs_section (p
->sec
->output_section
))
8158 /* Input section has been discarded, either because
8159 it is a copy of a linkonce section or due to
8160 linker script /DISCARD/, so we'll be discarding
8163 else if (p
->count
!= 0)
8165 srel
= elf_section_data (p
->sec
)->sreloc
;
8166 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
8167 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
8168 info
->flags
|= DF_TEXTREL
;
8173 locals
= elf_aarch64_locals (ibfd
);
8177 symtab_hdr
= &elf_symtab_hdr (ibfd
);
8178 srel
= htab
->root
.srelgot
;
8179 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
8181 locals
[i
].got_offset
= (bfd_vma
) - 1;
8182 locals
[i
].tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8183 if (locals
[i
].got_refcount
> 0)
8185 unsigned got_type
= locals
[i
].got_type
;
8186 if (got_type
& GOT_TLSDESC_GD
)
8188 locals
[i
].tlsdesc_got_jump_table_offset
=
8189 (htab
->root
.sgotplt
->size
8190 - aarch64_compute_jump_table_size (htab
));
8191 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8192 locals
[i
].got_offset
= (bfd_vma
) - 2;
8195 if (got_type
& GOT_TLS_GD
)
8197 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8198 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8201 if (got_type
& GOT_TLS_IE
8202 || got_type
& GOT_NORMAL
)
8204 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8205 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8208 if (got_type
== GOT_UNKNOWN
)
8212 if (bfd_link_pic (info
))
8214 if (got_type
& GOT_TLSDESC_GD
)
8216 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8217 /* Note RELOC_COUNT not incremented here! */
8218 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
8221 if (got_type
& GOT_TLS_GD
)
8222 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8224 if (got_type
& GOT_TLS_IE
8225 || got_type
& GOT_NORMAL
)
8226 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8231 locals
[i
].got_refcount
= (bfd_vma
) - 1;
8237 /* Allocate global sym .plt and .got entries, and space for global
8238 sym dynamic relocs. */
8239 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_dynrelocs
,
8242 /* Allocate global ifunc sym .plt and .got entries, and space for global
8243 ifunc sym dynamic relocs. */
8244 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_ifunc_dynrelocs
,
8247 /* Allocate .plt and .got entries, and space for local symbols. */
8248 htab_traverse (htab
->loc_hash_table
,
8249 elfNN_aarch64_allocate_local_dynrelocs
,
8252 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8253 htab_traverse (htab
->loc_hash_table
,
8254 elfNN_aarch64_allocate_local_ifunc_dynrelocs
,
8257 /* For every jump slot reserved in the sgotplt, reloc_count is
8258 incremented. However, when we reserve space for TLS descriptors,
8259 it's not incremented, so in order to compute the space reserved
8260 for them, it suffices to multiply the reloc count by the jump
8263 if (htab
->root
.srelplt
)
8264 htab
->sgotplt_jump_table_size
= aarch64_compute_jump_table_size (htab
);
8266 if (htab
->tlsdesc_plt
)
8268 if (htab
->root
.splt
->size
== 0)
8269 htab
->root
.splt
->size
+= PLT_ENTRY_SIZE
;
8271 htab
->tlsdesc_plt
= htab
->root
.splt
->size
;
8272 htab
->root
.splt
->size
+= PLT_TLSDESC_ENTRY_SIZE
;
8274 /* If we're not using lazy TLS relocations, don't generate the
8275 GOT entry required. */
8276 if (!(info
->flags
& DF_BIND_NOW
))
8278 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
8279 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8283 /* Init mapping symbols information to use later to distingush between
8284 code and data while scanning for errata. */
8285 if (htab
->fix_erratum_835769
|| htab
->fix_erratum_843419
)
8286 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8288 if (!is_aarch64_elf (ibfd
))
8290 bfd_elfNN_aarch64_init_maps (ibfd
);
8293 /* We now have determined the sizes of the various dynamic sections.
8294 Allocate memory for them. */
8296 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
8298 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
8301 if (s
== htab
->root
.splt
8302 || s
== htab
->root
.sgot
8303 || s
== htab
->root
.sgotplt
8304 || s
== htab
->root
.iplt
8305 || s
== htab
->root
.igotplt
|| s
== htab
->sdynbss
)
8307 /* Strip this section if we don't need it; see the
8310 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
8312 if (s
->size
!= 0 && s
!= htab
->root
.srelplt
)
8315 /* We use the reloc_count field as a counter if we need
8316 to copy relocs into the output file. */
8317 if (s
!= htab
->root
.srelplt
)
8322 /* It's not one of our sections, so don't allocate space. */
8328 /* If we don't need this section, strip it from the
8329 output file. This is mostly to handle .rela.bss and
8330 .rela.plt. We must create both sections in
8331 create_dynamic_sections, because they must be created
8332 before the linker maps input sections to output
8333 sections. The linker does that before
8334 adjust_dynamic_symbol is called, and it is that
8335 function which decides whether anything needs to go
8336 into these sections. */
8338 s
->flags
|= SEC_EXCLUDE
;
8342 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
8345 /* Allocate memory for the section contents. We use bfd_zalloc
8346 here in case unused entries are not reclaimed before the
8347 section's contents are written out. This should not happen,
8348 but this way if it does, we get a R_AARCH64_NONE reloc instead
8350 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
8351 if (s
->contents
== NULL
)
8355 if (htab
->root
.dynamic_sections_created
)
8357 /* Add some entries to the .dynamic section. We fill in the
8358 values later, in elfNN_aarch64_finish_dynamic_sections, but we
8359 must add the entries now so that we get the correct size for
8360 the .dynamic section. The DT_DEBUG entry is filled in by the
8361 dynamic linker and used by the debugger. */
8362 #define add_dynamic_entry(TAG, VAL) \
8363 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8365 if (bfd_link_executable (info
))
8367 if (!add_dynamic_entry (DT_DEBUG
, 0))
8371 if (htab
->root
.splt
->size
!= 0)
8373 if (!add_dynamic_entry (DT_PLTGOT
, 0)
8374 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
8375 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
8376 || !add_dynamic_entry (DT_JMPREL
, 0))
8379 if (htab
->tlsdesc_plt
8380 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
8381 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
8387 if (!add_dynamic_entry (DT_RELA
, 0)
8388 || !add_dynamic_entry (DT_RELASZ
, 0)
8389 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
8392 /* If any dynamic relocs apply to a read-only section,
8393 then we need a DT_TEXTREL entry. */
8394 if ((info
->flags
& DF_TEXTREL
) == 0)
8395 elf_link_hash_traverse (& htab
->root
, aarch64_readonly_dynrelocs
,
8398 if ((info
->flags
& DF_TEXTREL
) != 0)
8400 if (!add_dynamic_entry (DT_TEXTREL
, 0))
8405 #undef add_dynamic_entry
8411 elf_aarch64_update_plt_entry (bfd
*output_bfd
,
8412 bfd_reloc_code_real_type r_type
,
8413 bfd_byte
*plt_entry
, bfd_vma value
)
8415 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (r_type
);
8417 _bfd_aarch64_elf_put_addend (output_bfd
, plt_entry
, r_type
, howto
, value
);
8421 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry
*h
,
8422 struct elf_aarch64_link_hash_table
8423 *htab
, bfd
*output_bfd
,
8424 struct bfd_link_info
*info
)
8426 bfd_byte
*plt_entry
;
8429 bfd_vma gotplt_entry_address
;
8430 bfd_vma plt_entry_address
;
8431 Elf_Internal_Rela rela
;
8433 asection
*plt
, *gotplt
, *relplt
;
8435 /* When building a static executable, use .iplt, .igot.plt and
8436 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8437 if (htab
->root
.splt
!= NULL
)
8439 plt
= htab
->root
.splt
;
8440 gotplt
= htab
->root
.sgotplt
;
8441 relplt
= htab
->root
.srelplt
;
8445 plt
= htab
->root
.iplt
;
8446 gotplt
= htab
->root
.igotplt
;
8447 relplt
= htab
->root
.irelplt
;
8450 /* Get the index in the procedure linkage table which
8451 corresponds to this symbol. This is the index of this symbol
8452 in all the symbols for which we are making plt entries. The
8453 first entry in the procedure linkage table is reserved.
8455 Get the offset into the .got table of the entry that
8456 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
8457 bytes. The first three are reserved for the dynamic linker.
8459 For static executables, we don't reserve anything. */
8461 if (plt
== htab
->root
.splt
)
8463 plt_index
= (h
->plt
.offset
- htab
->plt_header_size
) / htab
->plt_entry_size
;
8464 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
8468 plt_index
= h
->plt
.offset
/ htab
->plt_entry_size
;
8469 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
8472 plt_entry
= plt
->contents
+ h
->plt
.offset
;
8473 plt_entry_address
= plt
->output_section
->vma
8474 + plt
->output_offset
+ h
->plt
.offset
;
8475 gotplt_entry_address
= gotplt
->output_section
->vma
+
8476 gotplt
->output_offset
+ got_offset
;
8478 /* Copy in the boiler-plate for the PLTn entry. */
8479 memcpy (plt_entry
, elfNN_aarch64_small_plt_entry
, PLT_SMALL_ENTRY_SIZE
);
8481 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8482 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8483 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
8485 PG (gotplt_entry_address
) -
8486 PG (plt_entry_address
));
8488 /* Fill in the lo12 bits for the load from the pltgot. */
8489 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
8491 PG_OFFSET (gotplt_entry_address
));
8493 /* Fill in the lo12 bits for the add from the pltgot entry. */
8494 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
8496 PG_OFFSET (gotplt_entry_address
));
8498 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8499 bfd_put_NN (output_bfd
,
8500 plt
->output_section
->vma
+ plt
->output_offset
,
8501 gotplt
->contents
+ got_offset
);
8503 rela
.r_offset
= gotplt_entry_address
;
8505 if (h
->dynindx
== -1
8506 || ((bfd_link_executable (info
)
8507 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
8509 && h
->type
== STT_GNU_IFUNC
))
8511 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8512 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8513 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
8514 rela
.r_addend
= (h
->root
.u
.def
.value
8515 + h
->root
.u
.def
.section
->output_section
->vma
8516 + h
->root
.u
.def
.section
->output_offset
);
8520 /* Fill in the entry in the .rela.plt section. */
8521 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (JUMP_SLOT
));
8525 /* Compute the relocation entry to used based on PLT index and do
8526 not adjust reloc_count. The reloc_count has already been adjusted
8527 to account for this entry. */
8528 loc
= relplt
->contents
+ plt_index
* RELOC_SIZE (htab
);
8529 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
8532 /* Size sections even though they're not dynamic. We use it to setup
8533 _TLS_MODULE_BASE_, if needed. */
8536 elfNN_aarch64_always_size_sections (bfd
*output_bfd
,
8537 struct bfd_link_info
*info
)
8541 if (bfd_link_relocatable (info
))
8544 tls_sec
= elf_hash_table (info
)->tls_sec
;
8548 struct elf_link_hash_entry
*tlsbase
;
8550 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
8551 "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
8555 struct bfd_link_hash_entry
*h
= NULL
;
8556 const struct elf_backend_data
*bed
=
8557 get_elf_backend_data (output_bfd
);
8559 if (!(_bfd_generic_link_add_one_symbol
8560 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
8561 tls_sec
, 0, NULL
, FALSE
, bed
->collect
, &h
)))
8564 tlsbase
->type
= STT_TLS
;
8565 tlsbase
= (struct elf_link_hash_entry
*) h
;
8566 tlsbase
->def_regular
= 1;
8567 tlsbase
->other
= STV_HIDDEN
;
8568 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
8575 /* Finish up dynamic symbol handling. We set the contents of various
8576 dynamic sections here. */
8578 elfNN_aarch64_finish_dynamic_symbol (bfd
*output_bfd
,
8579 struct bfd_link_info
*info
,
8580 struct elf_link_hash_entry
*h
,
8581 Elf_Internal_Sym
*sym
)
8583 struct elf_aarch64_link_hash_table
*htab
;
8584 htab
= elf_aarch64_hash_table (info
);
8586 if (h
->plt
.offset
!= (bfd_vma
) - 1)
8588 asection
*plt
, *gotplt
, *relplt
;
8590 /* This symbol has an entry in the procedure linkage table. Set
8593 /* When building a static executable, use .iplt, .igot.plt and
8594 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8595 if (htab
->root
.splt
!= NULL
)
8597 plt
= htab
->root
.splt
;
8598 gotplt
= htab
->root
.sgotplt
;
8599 relplt
= htab
->root
.srelplt
;
8603 plt
= htab
->root
.iplt
;
8604 gotplt
= htab
->root
.igotplt
;
8605 relplt
= htab
->root
.irelplt
;
8608 /* This symbol has an entry in the procedure linkage table. Set
8610 if ((h
->dynindx
== -1
8611 && !((h
->forced_local
|| bfd_link_executable (info
))
8613 && h
->type
== STT_GNU_IFUNC
))
8619 elfNN_aarch64_create_small_pltn_entry (h
, htab
, output_bfd
, info
);
8620 if (!h
->def_regular
)
8622 /* Mark the symbol as undefined, rather than as defined in
8623 the .plt section. */
8624 sym
->st_shndx
= SHN_UNDEF
;
8625 /* If the symbol is weak we need to clear the value.
8626 Otherwise, the PLT entry would provide a definition for
8627 the symbol even if the symbol wasn't defined anywhere,
8628 and so the symbol would never be NULL. Leave the value if
8629 there were any relocations where pointer equality matters
8630 (this is a clue for the dynamic linker, to make function
8631 pointer comparisons work between an application and shared
8633 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
8638 if (h
->got
.offset
!= (bfd_vma
) - 1
8639 && elf_aarch64_hash_entry (h
)->got_type
== GOT_NORMAL
)
8641 Elf_Internal_Rela rela
;
8644 /* This symbol has an entry in the global offset table. Set it
8646 if (htab
->root
.sgot
== NULL
|| htab
->root
.srelgot
== NULL
)
8649 rela
.r_offset
= (htab
->root
.sgot
->output_section
->vma
8650 + htab
->root
.sgot
->output_offset
8651 + (h
->got
.offset
& ~(bfd_vma
) 1));
8654 && h
->type
== STT_GNU_IFUNC
)
8656 if (bfd_link_pic (info
))
8658 /* Generate R_AARCH64_GLOB_DAT. */
8665 if (!h
->pointer_equality_needed
)
8668 /* For non-shared object, we can't use .got.plt, which
8669 contains the real function address if we need pointer
8670 equality. We load the GOT entry with the PLT entry. */
8671 plt
= htab
->root
.splt
? htab
->root
.splt
: htab
->root
.iplt
;
8672 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
8673 + plt
->output_offset
8675 htab
->root
.sgot
->contents
8676 + (h
->got
.offset
& ~(bfd_vma
) 1));
8680 else if (bfd_link_pic (info
) && SYMBOL_REFERENCES_LOCAL (info
, h
))
8682 if (!h
->def_regular
)
8685 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
8686 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
8687 rela
.r_addend
= (h
->root
.u
.def
.value
8688 + h
->root
.u
.def
.section
->output_section
->vma
8689 + h
->root
.u
.def
.section
->output_offset
);
8694 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
8695 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
8696 htab
->root
.sgot
->contents
+ h
->got
.offset
);
8697 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (GLOB_DAT
));
8701 loc
= htab
->root
.srelgot
->contents
;
8702 loc
+= htab
->root
.srelgot
->reloc_count
++ * RELOC_SIZE (htab
);
8703 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
8708 Elf_Internal_Rela rela
;
8711 /* This symbol needs a copy reloc. Set it up. */
8713 if (h
->dynindx
== -1
8714 || (h
->root
.type
!= bfd_link_hash_defined
8715 && h
->root
.type
!= bfd_link_hash_defweak
)
8716 || htab
->srelbss
== NULL
)
8719 rela
.r_offset
= (h
->root
.u
.def
.value
8720 + h
->root
.u
.def
.section
->output_section
->vma
8721 + h
->root
.u
.def
.section
->output_offset
);
8722 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (COPY
));
8724 loc
= htab
->srelbss
->contents
;
8725 loc
+= htab
->srelbss
->reloc_count
++ * RELOC_SIZE (htab
);
8726 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
8729 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
8730 be NULL for local symbols. */
8732 && (h
== elf_hash_table (info
)->hdynamic
8733 || h
== elf_hash_table (info
)->hgot
))
8734 sym
->st_shndx
= SHN_ABS
;
8739 /* Finish up local dynamic symbol handling. We set the contents of
8740 various dynamic sections here. */
8743 elfNN_aarch64_finish_local_dynamic_symbol (void **slot
, void *inf
)
8745 struct elf_link_hash_entry
*h
8746 = (struct elf_link_hash_entry
*) *slot
;
8747 struct bfd_link_info
*info
8748 = (struct bfd_link_info
*) inf
;
8750 return elfNN_aarch64_finish_dynamic_symbol (info
->output_bfd
,
8755 elfNN_aarch64_init_small_plt0_entry (bfd
*output_bfd ATTRIBUTE_UNUSED
,
8756 struct elf_aarch64_link_hash_table
8759 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
8760 small and large plts and at the minute just generates
8763 /* PLT0 of the small PLT looks like this in ELF64 -
8764 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
8765 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
8766 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
8768 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
8769 // GOTPLT entry for this.
8771 PLT0 will be slightly different in ELF32 due to different got entry
8774 bfd_vma plt_got_2nd_ent
; /* Address of GOT[2]. */
8778 memcpy (htab
->root
.splt
->contents
, elfNN_aarch64_small_plt0_entry
,
8780 elf_section_data (htab
->root
.splt
->output_section
)->this_hdr
.sh_entsize
=
8783 plt_got_2nd_ent
= (htab
->root
.sgotplt
->output_section
->vma
8784 + htab
->root
.sgotplt
->output_offset
8785 + GOT_ENTRY_SIZE
* 2);
8787 plt_base
= htab
->root
.splt
->output_section
->vma
+
8788 htab
->root
.splt
->output_offset
;
8790 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8791 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8792 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
8793 htab
->root
.splt
->contents
+ 4,
8794 PG (plt_got_2nd_ent
) - PG (plt_base
+ 4));
8796 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
8797 htab
->root
.splt
->contents
+ 8,
8798 PG_OFFSET (plt_got_2nd_ent
));
8800 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
8801 htab
->root
.splt
->contents
+ 12,
8802 PG_OFFSET (plt_got_2nd_ent
));
8806 elfNN_aarch64_finish_dynamic_sections (bfd
*output_bfd
,
8807 struct bfd_link_info
*info
)
8809 struct elf_aarch64_link_hash_table
*htab
;
8813 htab
= elf_aarch64_hash_table (info
);
8814 dynobj
= htab
->root
.dynobj
;
8815 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
8817 if (htab
->root
.dynamic_sections_created
)
8819 ElfNN_External_Dyn
*dyncon
, *dynconend
;
8821 if (sdyn
== NULL
|| htab
->root
.sgot
== NULL
)
8824 dyncon
= (ElfNN_External_Dyn
*) sdyn
->contents
;
8825 dynconend
= (ElfNN_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
8826 for (; dyncon
< dynconend
; dyncon
++)
8828 Elf_Internal_Dyn dyn
;
8831 bfd_elfNN_swap_dyn_in (dynobj
, dyncon
, &dyn
);
8839 s
= htab
->root
.sgotplt
;
8840 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
8844 dyn
.d_un
.d_ptr
= htab
->root
.srelplt
->output_section
->vma
;
8848 s
= htab
->root
.srelplt
;
8849 dyn
.d_un
.d_val
= s
->size
;
8853 /* The procedure linkage table relocs (DT_JMPREL) should
8854 not be included in the overall relocs (DT_RELA).
8855 Therefore, we override the DT_RELASZ entry here to
8856 make it not include the JMPREL relocs. Since the
8857 linker script arranges for .rela.plt to follow all
8858 other relocation sections, we don't have to worry
8859 about changing the DT_RELA entry. */
8860 if (htab
->root
.srelplt
!= NULL
)
8862 s
= htab
->root
.srelplt
;
8863 dyn
.d_un
.d_val
-= s
->size
;
8867 case DT_TLSDESC_PLT
:
8868 s
= htab
->root
.splt
;
8869 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
8870 + htab
->tlsdesc_plt
;
8873 case DT_TLSDESC_GOT
:
8874 s
= htab
->root
.sgot
;
8875 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
8876 + htab
->dt_tlsdesc_got
;
8880 bfd_elfNN_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
8885 /* Fill in the special first entry in the procedure linkage table. */
8886 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
8888 elfNN_aarch64_init_small_plt0_entry (output_bfd
, htab
);
8890 elf_section_data (htab
->root
.splt
->output_section
)->
8891 this_hdr
.sh_entsize
= htab
->plt_entry_size
;
8894 if (htab
->tlsdesc_plt
)
8896 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
8897 htab
->root
.sgot
->contents
+ htab
->dt_tlsdesc_got
);
8899 memcpy (htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
,
8900 elfNN_aarch64_tlsdesc_small_plt_entry
,
8901 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry
));
8904 bfd_vma adrp1_addr
=
8905 htab
->root
.splt
->output_section
->vma
8906 + htab
->root
.splt
->output_offset
+ htab
->tlsdesc_plt
+ 4;
8908 bfd_vma adrp2_addr
= adrp1_addr
+ 4;
8911 htab
->root
.sgot
->output_section
->vma
8912 + htab
->root
.sgot
->output_offset
;
8914 bfd_vma pltgot_addr
=
8915 htab
->root
.sgotplt
->output_section
->vma
8916 + htab
->root
.sgotplt
->output_offset
;
8918 bfd_vma dt_tlsdesc_got
= got_addr
+ htab
->dt_tlsdesc_got
;
8920 bfd_byte
*plt_entry
=
8921 htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
;
8923 /* adrp x2, DT_TLSDESC_GOT */
8924 elf_aarch64_update_plt_entry (output_bfd
,
8925 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
8927 (PG (dt_tlsdesc_got
)
8928 - PG (adrp1_addr
)));
8931 elf_aarch64_update_plt_entry (output_bfd
,
8932 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
8935 - PG (adrp2_addr
)));
8937 /* ldr x2, [x2, #0] */
8938 elf_aarch64_update_plt_entry (output_bfd
,
8939 BFD_RELOC_AARCH64_LDSTNN_LO12
,
8941 PG_OFFSET (dt_tlsdesc_got
));
8944 elf_aarch64_update_plt_entry (output_bfd
,
8945 BFD_RELOC_AARCH64_ADD_LO12
,
8947 PG_OFFSET (pltgot_addr
));
8952 if (htab
->root
.sgotplt
)
8954 if (bfd_is_abs_section (htab
->root
.sgotplt
->output_section
))
8956 (*_bfd_error_handler
)
8957 (_("discarded output section: `%A'"), htab
->root
.sgotplt
);
8961 /* Fill in the first three entries in the global offset table. */
8962 if (htab
->root
.sgotplt
->size
> 0)
8964 bfd_put_NN (output_bfd
, (bfd_vma
) 0, htab
->root
.sgotplt
->contents
);
8966 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
8967 bfd_put_NN (output_bfd
,
8969 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
8970 bfd_put_NN (output_bfd
,
8972 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
* 2);
8975 if (htab
->root
.sgot
)
8977 if (htab
->root
.sgot
->size
> 0)
8980 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0;
8981 bfd_put_NN (output_bfd
, addr
, htab
->root
.sgot
->contents
);
8985 elf_section_data (htab
->root
.sgotplt
->output_section
)->
8986 this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
8989 if (htab
->root
.sgot
&& htab
->root
.sgot
->size
> 0)
8990 elf_section_data (htab
->root
.sgot
->output_section
)->this_hdr
.sh_entsize
8993 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
8994 htab_traverse (htab
->loc_hash_table
,
8995 elfNN_aarch64_finish_local_dynamic_symbol
,
9001 /* Return address for Ith PLT stub in section PLT, for relocation REL
9002 or (bfd_vma) -1 if it should not be included. */
9005 elfNN_aarch64_plt_sym_val (bfd_vma i
, const asection
*plt
,
9006 const arelent
*rel ATTRIBUTE_UNUSED
)
9008 return plt
->vma
+ PLT_ENTRY_SIZE
+ i
* PLT_SMALL_ENTRY_SIZE
;
9012 /* We use this so we can override certain functions
9013 (though currently we don't). */
9015 const struct elf_size_info elfNN_aarch64_size_info
=
9017 sizeof (ElfNN_External_Ehdr
),
9018 sizeof (ElfNN_External_Phdr
),
9019 sizeof (ElfNN_External_Shdr
),
9020 sizeof (ElfNN_External_Rel
),
9021 sizeof (ElfNN_External_Rela
),
9022 sizeof (ElfNN_External_Sym
),
9023 sizeof (ElfNN_External_Dyn
),
9024 sizeof (Elf_External_Note
),
9025 4, /* Hash table entry size. */
9026 1, /* Internal relocs per external relocs. */
9027 ARCH_SIZE
, /* Arch size. */
9028 LOG_FILE_ALIGN
, /* Log_file_align. */
9029 ELFCLASSNN
, EV_CURRENT
,
9030 bfd_elfNN_write_out_phdrs
,
9031 bfd_elfNN_write_shdrs_and_ehdr
,
9032 bfd_elfNN_checksum_contents
,
9033 bfd_elfNN_write_relocs
,
9034 bfd_elfNN_swap_symbol_in
,
9035 bfd_elfNN_swap_symbol_out
,
9036 bfd_elfNN_slurp_reloc_table
,
9037 bfd_elfNN_slurp_symbol_table
,
9038 bfd_elfNN_swap_dyn_in
,
9039 bfd_elfNN_swap_dyn_out
,
9040 bfd_elfNN_swap_reloc_in
,
9041 bfd_elfNN_swap_reloc_out
,
9042 bfd_elfNN_swap_reloca_in
,
9043 bfd_elfNN_swap_reloca_out
9046 #define ELF_ARCH bfd_arch_aarch64
9047 #define ELF_MACHINE_CODE EM_AARCH64
9048 #define ELF_MAXPAGESIZE 0x10000
9049 #define ELF_MINPAGESIZE 0x1000
9050 #define ELF_COMMONPAGESIZE 0x1000
9052 #define bfd_elfNN_close_and_cleanup \
9053 elfNN_aarch64_close_and_cleanup
9055 #define bfd_elfNN_bfd_free_cached_info \
9056 elfNN_aarch64_bfd_free_cached_info
9058 #define bfd_elfNN_bfd_is_target_special_symbol \
9059 elfNN_aarch64_is_target_special_symbol
9061 #define bfd_elfNN_bfd_link_hash_table_create \
9062 elfNN_aarch64_link_hash_table_create
9064 #define bfd_elfNN_bfd_merge_private_bfd_data \
9065 elfNN_aarch64_merge_private_bfd_data
9067 #define bfd_elfNN_bfd_print_private_bfd_data \
9068 elfNN_aarch64_print_private_bfd_data
9070 #define bfd_elfNN_bfd_reloc_type_lookup \
9071 elfNN_aarch64_reloc_type_lookup
9073 #define bfd_elfNN_bfd_reloc_name_lookup \
9074 elfNN_aarch64_reloc_name_lookup
9076 #define bfd_elfNN_bfd_set_private_flags \
9077 elfNN_aarch64_set_private_flags
9079 #define bfd_elfNN_find_inliner_info \
9080 elfNN_aarch64_find_inliner_info
9082 #define bfd_elfNN_find_nearest_line \
9083 elfNN_aarch64_find_nearest_line
9085 #define bfd_elfNN_mkobject \
9086 elfNN_aarch64_mkobject
9088 #define bfd_elfNN_new_section_hook \
9089 elfNN_aarch64_new_section_hook
9091 #define elf_backend_adjust_dynamic_symbol \
9092 elfNN_aarch64_adjust_dynamic_symbol
9094 #define elf_backend_always_size_sections \
9095 elfNN_aarch64_always_size_sections
9097 #define elf_backend_check_relocs \
9098 elfNN_aarch64_check_relocs
9100 #define elf_backend_copy_indirect_symbol \
9101 elfNN_aarch64_copy_indirect_symbol
9103 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
9104 to them in our hash. */
9105 #define elf_backend_create_dynamic_sections \
9106 elfNN_aarch64_create_dynamic_sections
9108 #define elf_backend_init_index_section \
9109 _bfd_elf_init_2_index_sections
9111 #define elf_backend_finish_dynamic_sections \
9112 elfNN_aarch64_finish_dynamic_sections
9114 #define elf_backend_finish_dynamic_symbol \
9115 elfNN_aarch64_finish_dynamic_symbol
9117 #define elf_backend_gc_sweep_hook \
9118 elfNN_aarch64_gc_sweep_hook
9120 #define elf_backend_object_p \
9121 elfNN_aarch64_object_p
9123 #define elf_backend_output_arch_local_syms \
9124 elfNN_aarch64_output_arch_local_syms
9126 #define elf_backend_plt_sym_val \
9127 elfNN_aarch64_plt_sym_val
9129 #define elf_backend_post_process_headers \
9130 elfNN_aarch64_post_process_headers
9132 #define elf_backend_relocate_section \
9133 elfNN_aarch64_relocate_section
9135 #define elf_backend_reloc_type_class \
9136 elfNN_aarch64_reloc_type_class
9138 #define elf_backend_section_from_shdr \
9139 elfNN_aarch64_section_from_shdr
9141 #define elf_backend_size_dynamic_sections \
9142 elfNN_aarch64_size_dynamic_sections
9144 #define elf_backend_size_info \
9145 elfNN_aarch64_size_info
9147 #define elf_backend_write_section \
9148 elfNN_aarch64_write_section
9150 #define elf_backend_can_refcount 1
9151 #define elf_backend_can_gc_sections 1
9152 #define elf_backend_plt_readonly 1
9153 #define elf_backend_want_got_plt 1
9154 #define elf_backend_want_plt_sym 0
9155 #define elf_backend_may_use_rel_p 0
9156 #define elf_backend_may_use_rela_p 1
9157 #define elf_backend_default_use_rela_p 1
9158 #define elf_backend_rela_normal 1
9159 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
9160 #define elf_backend_default_execstack 0
9161 #define elf_backend_extern_protected_data 1
9163 #undef elf_backend_obj_attrs_section
9164 #define elf_backend_obj_attrs_section ".ARM.attributes"
9166 #include "elfNN-target.h"