1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2017 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
157 #define BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
161 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
162 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
163 #define HOWTO64(...) EMPTY_HOWTO (0)
164 #define HOWTO32(...) HOWTO (__VA_ARGS__)
165 #define LOG_FILE_ALIGN 2
166 #define BFD_RELOC_AARCH64_TLSDESC_LD32_LO12 BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
167 #define R_AARCH64_P32_TLSDESC_ADD_LO12 R_AARCH64_P32_TLSDESC_ADD_LO12_NC
170 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
171 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12 \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \
188 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12 \
189 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC \
190 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12 \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12 \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12 \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0 \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1 \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2 \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
203 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
204 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
207 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
208 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
209 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
210 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
211 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
212 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
214 #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \
215 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
216 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
217 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
218 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
219 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
220 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
221 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \
222 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
223 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
224 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
225 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
226 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
227 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
228 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
229 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
230 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
231 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
232 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
233 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \
234 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
235 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
236 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21)
238 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
239 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
240 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
241 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
242 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
243 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
244 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
245 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
246 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 \
247 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
248 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
249 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
250 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
252 #define ELIMINATE_COPY_RELOCS 1
254 /* Return size of a relocation entry. HTAB is the bfd's
255 elf_aarch64_link_hash_entry. */
256 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
258 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
259 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
260 #define PLT_ENTRY_SIZE (32)
261 #define PLT_SMALL_ENTRY_SIZE (16)
262 #define PLT_TLSDESC_ENTRY_SIZE (32)
264 /* Encoding of the nop instruction. */
265 #define INSN_NOP 0xd503201f
267 #define aarch64_compute_jump_table_size(htab) \
268 (((htab)->root.srelplt == NULL) ? 0 \
269 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
271 /* The first entry in a procedure linkage table looks like this
272 if the distance between the PLTGOT and the PLT is < 4GB use
273 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
274 in x16 and needs to work out PLTGOT[1] by using an address of
275 [x16,#-GOT_ENTRY_SIZE]. */
276 static const bfd_byte elfNN_aarch64_small_plt0_entry
[PLT_ENTRY_SIZE
] =
278 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
279 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
281 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
282 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
284 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
285 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
287 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
288 0x1f, 0x20, 0x03, 0xd5, /* nop */
289 0x1f, 0x20, 0x03, 0xd5, /* nop */
290 0x1f, 0x20, 0x03, 0xd5, /* nop */
293 /* Per function entry in a procedure linkage table looks like this
294 if the distance between the PLTGOT and the PLT is < 4GB use
295 these PLT entries. */
296 static const bfd_byte elfNN_aarch64_small_plt_entry
[PLT_SMALL_ENTRY_SIZE
] =
298 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
300 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
301 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
303 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
304 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
306 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
309 static const bfd_byte
310 elfNN_aarch64_tlsdesc_small_plt_entry
[PLT_TLSDESC_ENTRY_SIZE
] =
312 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
313 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
314 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
316 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
317 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
319 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
320 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
322 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
323 0x1f, 0x20, 0x03, 0xd5, /* nop */
324 0x1f, 0x20, 0x03, 0xd5, /* nop */
327 #define elf_info_to_howto elfNN_aarch64_info_to_howto
328 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
330 #define AARCH64_ELF_ABI_VERSION 0
332 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
333 #define ALL_ONES (~ (bfd_vma) 0)
335 /* Indexed by the bfd interal reloc enumerators.
336 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
339 static reloc_howto_type elfNN_aarch64_howto_table
[] =
343 /* Basic data relocations. */
345 /* Deprecated, but retained for backwards compatibility. */
346 HOWTO64 (R_AARCH64_NULL
, /* type */
348 3, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE
, /* pc_relative */
352 complain_overflow_dont
, /* complain_on_overflow */
353 bfd_elf_generic_reloc
, /* special_function */
354 "R_AARCH64_NULL", /* name */
355 FALSE
, /* partial_inplace */
358 FALSE
), /* pcrel_offset */
359 HOWTO (R_AARCH64_NONE
, /* type */
361 3, /* size (0 = byte, 1 = short, 2 = long) */
363 FALSE
, /* pc_relative */
365 complain_overflow_dont
, /* complain_on_overflow */
366 bfd_elf_generic_reloc
, /* special_function */
367 "R_AARCH64_NONE", /* name */
368 FALSE
, /* partial_inplace */
371 FALSE
), /* pcrel_offset */
374 HOWTO64 (AARCH64_R (ABS64
), /* type */
376 4, /* size (4 = long long) */
378 FALSE
, /* pc_relative */
380 complain_overflow_unsigned
, /* complain_on_overflow */
381 bfd_elf_generic_reloc
, /* special_function */
382 AARCH64_R_STR (ABS64
), /* name */
383 FALSE
, /* partial_inplace */
384 ALL_ONES
, /* src_mask */
385 ALL_ONES
, /* dst_mask */
386 FALSE
), /* pcrel_offset */
389 HOWTO (AARCH64_R (ABS32
), /* type */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_unsigned
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 AARCH64_R_STR (ABS32
), /* name */
398 FALSE
, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
404 HOWTO (AARCH64_R (ABS16
), /* type */
406 1, /* size (0 = byte, 1 = short, 2 = long) */
408 FALSE
, /* pc_relative */
410 complain_overflow_unsigned
, /* complain_on_overflow */
411 bfd_elf_generic_reloc
, /* special_function */
412 AARCH64_R_STR (ABS16
), /* name */
413 FALSE
, /* partial_inplace */
414 0xffff, /* src_mask */
415 0xffff, /* dst_mask */
416 FALSE
), /* pcrel_offset */
418 /* .xword: (S+A-P) */
419 HOWTO64 (AARCH64_R (PREL64
), /* type */
421 4, /* size (4 = long long) */
423 TRUE
, /* pc_relative */
425 complain_overflow_signed
, /* complain_on_overflow */
426 bfd_elf_generic_reloc
, /* special_function */
427 AARCH64_R_STR (PREL64
), /* name */
428 FALSE
, /* partial_inplace */
429 ALL_ONES
, /* src_mask */
430 ALL_ONES
, /* dst_mask */
431 TRUE
), /* pcrel_offset */
434 HOWTO (AARCH64_R (PREL32
), /* type */
436 2, /* size (0 = byte, 1 = short, 2 = long) */
438 TRUE
, /* pc_relative */
440 complain_overflow_signed
, /* complain_on_overflow */
441 bfd_elf_generic_reloc
, /* special_function */
442 AARCH64_R_STR (PREL32
), /* name */
443 FALSE
, /* partial_inplace */
444 0xffffffff, /* src_mask */
445 0xffffffff, /* dst_mask */
446 TRUE
), /* pcrel_offset */
449 HOWTO (AARCH64_R (PREL16
), /* type */
451 1, /* size (0 = byte, 1 = short, 2 = long) */
453 TRUE
, /* pc_relative */
455 complain_overflow_signed
, /* complain_on_overflow */
456 bfd_elf_generic_reloc
, /* special_function */
457 AARCH64_R_STR (PREL16
), /* name */
458 FALSE
, /* partial_inplace */
459 0xffff, /* src_mask */
460 0xffff, /* dst_mask */
461 TRUE
), /* pcrel_offset */
463 /* Group relocations to create a 16, 32, 48 or 64 bit
464 unsigned data or abs address inline. */
466 /* MOVZ: ((S+A) >> 0) & 0xffff */
467 HOWTO (AARCH64_R (MOVW_UABS_G0
), /* type */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
471 FALSE
, /* pc_relative */
473 complain_overflow_unsigned
, /* complain_on_overflow */
474 bfd_elf_generic_reloc
, /* special_function */
475 AARCH64_R_STR (MOVW_UABS_G0
), /* name */
476 FALSE
, /* partial_inplace */
477 0xffff, /* src_mask */
478 0xffff, /* dst_mask */
479 FALSE
), /* pcrel_offset */
481 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
482 HOWTO (AARCH64_R (MOVW_UABS_G0_NC
), /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 FALSE
, /* pc_relative */
488 complain_overflow_dont
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 AARCH64_R_STR (MOVW_UABS_G0_NC
), /* name */
491 FALSE
, /* partial_inplace */
492 0xffff, /* src_mask */
493 0xffff, /* dst_mask */
494 FALSE
), /* pcrel_offset */
496 /* MOVZ: ((S+A) >> 16) & 0xffff */
497 HOWTO (AARCH64_R (MOVW_UABS_G1
), /* type */
499 2, /* size (0 = byte, 1 = short, 2 = long) */
501 FALSE
, /* pc_relative */
503 complain_overflow_unsigned
, /* complain_on_overflow */
504 bfd_elf_generic_reloc
, /* special_function */
505 AARCH64_R_STR (MOVW_UABS_G1
), /* name */
506 FALSE
, /* partial_inplace */
507 0xffff, /* src_mask */
508 0xffff, /* dst_mask */
509 FALSE
), /* pcrel_offset */
511 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
512 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC
), /* type */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
516 FALSE
, /* pc_relative */
518 complain_overflow_dont
, /* complain_on_overflow */
519 bfd_elf_generic_reloc
, /* special_function */
520 AARCH64_R_STR (MOVW_UABS_G1_NC
), /* name */
521 FALSE
, /* partial_inplace */
522 0xffff, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE
), /* pcrel_offset */
526 /* MOVZ: ((S+A) >> 32) & 0xffff */
527 HOWTO64 (AARCH64_R (MOVW_UABS_G2
), /* type */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
531 FALSE
, /* pc_relative */
533 complain_overflow_unsigned
, /* complain_on_overflow */
534 bfd_elf_generic_reloc
, /* special_function */
535 AARCH64_R_STR (MOVW_UABS_G2
), /* name */
536 FALSE
, /* partial_inplace */
537 0xffff, /* src_mask */
538 0xffff, /* dst_mask */
539 FALSE
), /* pcrel_offset */
541 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
542 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC
), /* type */
544 2, /* size (0 = byte, 1 = short, 2 = long) */
546 FALSE
, /* pc_relative */
548 complain_overflow_dont
, /* complain_on_overflow */
549 bfd_elf_generic_reloc
, /* special_function */
550 AARCH64_R_STR (MOVW_UABS_G2_NC
), /* name */
551 FALSE
, /* partial_inplace */
552 0xffff, /* src_mask */
553 0xffff, /* dst_mask */
554 FALSE
), /* pcrel_offset */
556 /* MOVZ: ((S+A) >> 48) & 0xffff */
557 HOWTO64 (AARCH64_R (MOVW_UABS_G3
), /* type */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
561 FALSE
, /* pc_relative */
563 complain_overflow_unsigned
, /* complain_on_overflow */
564 bfd_elf_generic_reloc
, /* special_function */
565 AARCH64_R_STR (MOVW_UABS_G3
), /* name */
566 FALSE
, /* partial_inplace */
567 0xffff, /* src_mask */
568 0xffff, /* dst_mask */
569 FALSE
), /* pcrel_offset */
571 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
572 signed data or abs address inline. Will change instruction
573 to MOVN or MOVZ depending on sign of calculated value. */
575 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
576 HOWTO (AARCH64_R (MOVW_SABS_G0
), /* type */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
580 FALSE
, /* pc_relative */
582 complain_overflow_signed
, /* complain_on_overflow */
583 bfd_elf_generic_reloc
, /* special_function */
584 AARCH64_R_STR (MOVW_SABS_G0
), /* name */
585 FALSE
, /* partial_inplace */
586 0xffff, /* src_mask */
587 0xffff, /* dst_mask */
588 FALSE
), /* pcrel_offset */
590 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
591 HOWTO64 (AARCH64_R (MOVW_SABS_G1
), /* type */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
595 FALSE
, /* pc_relative */
597 complain_overflow_signed
, /* complain_on_overflow */
598 bfd_elf_generic_reloc
, /* special_function */
599 AARCH64_R_STR (MOVW_SABS_G1
), /* name */
600 FALSE
, /* partial_inplace */
601 0xffff, /* src_mask */
602 0xffff, /* dst_mask */
603 FALSE
), /* pcrel_offset */
605 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
606 HOWTO64 (AARCH64_R (MOVW_SABS_G2
), /* type */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
610 FALSE
, /* pc_relative */
612 complain_overflow_signed
, /* complain_on_overflow */
613 bfd_elf_generic_reloc
, /* special_function */
614 AARCH64_R_STR (MOVW_SABS_G2
), /* name */
615 FALSE
, /* partial_inplace */
616 0xffff, /* src_mask */
617 0xffff, /* dst_mask */
618 FALSE
), /* pcrel_offset */
620 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
621 addresses: PG(x) is (x & ~0xfff). */
623 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
624 HOWTO (AARCH64_R (LD_PREL_LO19
), /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 TRUE
, /* pc_relative */
630 complain_overflow_signed
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 AARCH64_R_STR (LD_PREL_LO19
), /* name */
633 FALSE
, /* partial_inplace */
634 0x7ffff, /* src_mask */
635 0x7ffff, /* dst_mask */
636 TRUE
), /* pcrel_offset */
638 /* ADR: (S+A-P) & 0x1fffff */
639 HOWTO (AARCH64_R (ADR_PREL_LO21
), /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 TRUE
, /* pc_relative */
645 complain_overflow_signed
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 AARCH64_R_STR (ADR_PREL_LO21
), /* name */
648 FALSE
, /* partial_inplace */
649 0x1fffff, /* src_mask */
650 0x1fffff, /* dst_mask */
651 TRUE
), /* pcrel_offset */
653 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
654 HOWTO (AARCH64_R (ADR_PREL_PG_HI21
), /* type */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
658 TRUE
, /* pc_relative */
660 complain_overflow_signed
, /* complain_on_overflow */
661 bfd_elf_generic_reloc
, /* special_function */
662 AARCH64_R_STR (ADR_PREL_PG_HI21
), /* name */
663 FALSE
, /* partial_inplace */
664 0x1fffff, /* src_mask */
665 0x1fffff, /* dst_mask */
666 TRUE
), /* pcrel_offset */
668 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
669 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC
), /* type */
671 2, /* size (0 = byte, 1 = short, 2 = long) */
673 TRUE
, /* pc_relative */
675 complain_overflow_dont
, /* complain_on_overflow */
676 bfd_elf_generic_reloc
, /* special_function */
677 AARCH64_R_STR (ADR_PREL_PG_HI21_NC
), /* name */
678 FALSE
, /* partial_inplace */
679 0x1fffff, /* src_mask */
680 0x1fffff, /* dst_mask */
681 TRUE
), /* pcrel_offset */
683 /* ADD: (S+A) & 0xfff [no overflow check] */
684 HOWTO (AARCH64_R (ADD_ABS_LO12_NC
), /* type */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
688 FALSE
, /* pc_relative */
690 complain_overflow_dont
, /* complain_on_overflow */
691 bfd_elf_generic_reloc
, /* special_function */
692 AARCH64_R_STR (ADD_ABS_LO12_NC
), /* name */
693 FALSE
, /* partial_inplace */
694 0x3ffc00, /* src_mask */
695 0x3ffc00, /* dst_mask */
696 FALSE
), /* pcrel_offset */
698 /* LD/ST8: (S+A) & 0xfff */
699 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC
), /* type */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
703 FALSE
, /* pc_relative */
705 complain_overflow_dont
, /* complain_on_overflow */
706 bfd_elf_generic_reloc
, /* special_function */
707 AARCH64_R_STR (LDST8_ABS_LO12_NC
), /* name */
708 FALSE
, /* partial_inplace */
709 0xfff, /* src_mask */
710 0xfff, /* dst_mask */
711 FALSE
), /* pcrel_offset */
713 /* Relocations for control-flow instructions. */
715 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
716 HOWTO (AARCH64_R (TSTBR14
), /* type */
718 2, /* size (0 = byte, 1 = short, 2 = long) */
720 TRUE
, /* pc_relative */
722 complain_overflow_signed
, /* complain_on_overflow */
723 bfd_elf_generic_reloc
, /* special_function */
724 AARCH64_R_STR (TSTBR14
), /* name */
725 FALSE
, /* partial_inplace */
726 0x3fff, /* src_mask */
727 0x3fff, /* dst_mask */
728 TRUE
), /* pcrel_offset */
730 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
731 HOWTO (AARCH64_R (CONDBR19
), /* type */
733 2, /* size (0 = byte, 1 = short, 2 = long) */
735 TRUE
, /* pc_relative */
737 complain_overflow_signed
, /* complain_on_overflow */
738 bfd_elf_generic_reloc
, /* special_function */
739 AARCH64_R_STR (CONDBR19
), /* name */
740 FALSE
, /* partial_inplace */
741 0x7ffff, /* src_mask */
742 0x7ffff, /* dst_mask */
743 TRUE
), /* pcrel_offset */
745 /* B: ((S+A-P) >> 2) & 0x3ffffff */
746 HOWTO (AARCH64_R (JUMP26
), /* type */
748 2, /* size (0 = byte, 1 = short, 2 = long) */
750 TRUE
, /* pc_relative */
752 complain_overflow_signed
, /* complain_on_overflow */
753 bfd_elf_generic_reloc
, /* special_function */
754 AARCH64_R_STR (JUMP26
), /* name */
755 FALSE
, /* partial_inplace */
756 0x3ffffff, /* src_mask */
757 0x3ffffff, /* dst_mask */
758 TRUE
), /* pcrel_offset */
760 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
761 HOWTO (AARCH64_R (CALL26
), /* type */
763 2, /* size (0 = byte, 1 = short, 2 = long) */
765 TRUE
, /* pc_relative */
767 complain_overflow_signed
, /* complain_on_overflow */
768 bfd_elf_generic_reloc
, /* special_function */
769 AARCH64_R_STR (CALL26
), /* name */
770 FALSE
, /* partial_inplace */
771 0x3ffffff, /* src_mask */
772 0x3ffffff, /* dst_mask */
773 TRUE
), /* pcrel_offset */
775 /* LD/ST16: (S+A) & 0xffe */
776 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC
), /* type */
778 2, /* size (0 = byte, 1 = short, 2 = long) */
780 FALSE
, /* pc_relative */
782 complain_overflow_dont
, /* complain_on_overflow */
783 bfd_elf_generic_reloc
, /* special_function */
784 AARCH64_R_STR (LDST16_ABS_LO12_NC
), /* name */
785 FALSE
, /* partial_inplace */
786 0xffe, /* src_mask */
787 0xffe, /* dst_mask */
788 FALSE
), /* pcrel_offset */
790 /* LD/ST32: (S+A) & 0xffc */
791 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC
), /* type */
793 2, /* size (0 = byte, 1 = short, 2 = long) */
795 FALSE
, /* pc_relative */
797 complain_overflow_dont
, /* complain_on_overflow */
798 bfd_elf_generic_reloc
, /* special_function */
799 AARCH64_R_STR (LDST32_ABS_LO12_NC
), /* name */
800 FALSE
, /* partial_inplace */
801 0xffc, /* src_mask */
802 0xffc, /* dst_mask */
803 FALSE
), /* pcrel_offset */
805 /* LD/ST64: (S+A) & 0xff8 */
806 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC
), /* type */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
810 FALSE
, /* pc_relative */
812 complain_overflow_dont
, /* complain_on_overflow */
813 bfd_elf_generic_reloc
, /* special_function */
814 AARCH64_R_STR (LDST64_ABS_LO12_NC
), /* name */
815 FALSE
, /* partial_inplace */
816 0xff8, /* src_mask */
817 0xff8, /* dst_mask */
818 FALSE
), /* pcrel_offset */
820 /* LD/ST128: (S+A) & 0xff0 */
821 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC
), /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE
, /* pc_relative */
827 complain_overflow_dont
, /* complain_on_overflow */
828 bfd_elf_generic_reloc
, /* special_function */
829 AARCH64_R_STR (LDST128_ABS_LO12_NC
), /* name */
830 FALSE
, /* partial_inplace */
831 0xff0, /* src_mask */
832 0xff0, /* dst_mask */
833 FALSE
), /* pcrel_offset */
835 /* Set a load-literal immediate field to bits
836 0x1FFFFC of G(S)-P */
837 HOWTO (AARCH64_R (GOT_LD_PREL19
), /* type */
839 2, /* size (0 = byte,1 = short,2 = long) */
841 TRUE
, /* pc_relative */
843 complain_overflow_signed
, /* complain_on_overflow */
844 bfd_elf_generic_reloc
, /* special_function */
845 AARCH64_R_STR (GOT_LD_PREL19
), /* name */
846 FALSE
, /* partial_inplace */
847 0xffffe0, /* src_mask */
848 0xffffe0, /* dst_mask */
849 TRUE
), /* pcrel_offset */
851 /* Get to the page for the GOT entry for the symbol
852 (G(S) - P) using an ADRP instruction. */
853 HOWTO (AARCH64_R (ADR_GOT_PAGE
), /* type */
855 2, /* size (0 = byte, 1 = short, 2 = long) */
857 TRUE
, /* pc_relative */
859 complain_overflow_dont
, /* complain_on_overflow */
860 bfd_elf_generic_reloc
, /* special_function */
861 AARCH64_R_STR (ADR_GOT_PAGE
), /* name */
862 FALSE
, /* partial_inplace */
863 0x1fffff, /* src_mask */
864 0x1fffff, /* dst_mask */
865 TRUE
), /* pcrel_offset */
867 /* LD64: GOT offset G(S) & 0xff8 */
868 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC
), /* type */
870 2, /* size (0 = byte, 1 = short, 2 = long) */
872 FALSE
, /* pc_relative */
874 complain_overflow_dont
, /* complain_on_overflow */
875 bfd_elf_generic_reloc
, /* special_function */
876 AARCH64_R_STR (LD64_GOT_LO12_NC
), /* name */
877 FALSE
, /* partial_inplace */
878 0xff8, /* src_mask */
879 0xff8, /* dst_mask */
880 FALSE
), /* pcrel_offset */
882 /* LD32: GOT offset G(S) & 0xffc */
883 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC
), /* type */
885 2, /* size (0 = byte, 1 = short, 2 = long) */
887 FALSE
, /* pc_relative */
889 complain_overflow_dont
, /* complain_on_overflow */
890 bfd_elf_generic_reloc
, /* special_function */
891 AARCH64_R_STR (LD32_GOT_LO12_NC
), /* name */
892 FALSE
, /* partial_inplace */
893 0xffc, /* src_mask */
894 0xffc, /* dst_mask */
895 FALSE
), /* pcrel_offset */
897 /* Lower 16 bits of GOT offset for the symbol. */
898 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC
), /* type */
900 2, /* size (0 = byte, 1 = short, 2 = long) */
902 FALSE
, /* pc_relative */
904 complain_overflow_dont
, /* complain_on_overflow */
905 bfd_elf_generic_reloc
, /* special_function */
906 AARCH64_R_STR (MOVW_GOTOFF_G0_NC
), /* name */
907 FALSE
, /* partial_inplace */
908 0xffff, /* src_mask */
909 0xffff, /* dst_mask */
910 FALSE
), /* pcrel_offset */
912 /* Higher 16 bits of GOT offset for the symbol. */
913 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1
), /* type */
915 2, /* size (0 = byte, 1 = short, 2 = long) */
917 FALSE
, /* pc_relative */
919 complain_overflow_unsigned
, /* complain_on_overflow */
920 bfd_elf_generic_reloc
, /* special_function */
921 AARCH64_R_STR (MOVW_GOTOFF_G1
), /* name */
922 FALSE
, /* partial_inplace */
923 0xffff, /* src_mask */
924 0xffff, /* dst_mask */
925 FALSE
), /* pcrel_offset */
927 /* LD64: GOT offset for the symbol. */
928 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15
), /* type */
930 2, /* size (0 = byte, 1 = short, 2 = long) */
932 FALSE
, /* pc_relative */
934 complain_overflow_unsigned
, /* complain_on_overflow */
935 bfd_elf_generic_reloc
, /* special_function */
936 AARCH64_R_STR (LD64_GOTOFF_LO15
), /* name */
937 FALSE
, /* partial_inplace */
938 0x7ff8, /* src_mask */
939 0x7ff8, /* dst_mask */
940 FALSE
), /* pcrel_offset */
942 /* LD32: GOT offset to the page address of GOT table.
943 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
944 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14
), /* type */
946 2, /* size (0 = byte, 1 = short, 2 = long) */
948 FALSE
, /* pc_relative */
950 complain_overflow_unsigned
, /* complain_on_overflow */
951 bfd_elf_generic_reloc
, /* special_function */
952 AARCH64_R_STR (LD32_GOTPAGE_LO14
), /* name */
953 FALSE
, /* partial_inplace */
954 0x5ffc, /* src_mask */
955 0x5ffc, /* dst_mask */
956 FALSE
), /* pcrel_offset */
958 /* LD64: GOT offset to the page address of GOT table.
959 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
960 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15
), /* type */
962 2, /* size (0 = byte, 1 = short, 2 = long) */
964 FALSE
, /* pc_relative */
966 complain_overflow_unsigned
, /* complain_on_overflow */
967 bfd_elf_generic_reloc
, /* special_function */
968 AARCH64_R_STR (LD64_GOTPAGE_LO15
), /* name */
969 FALSE
, /* partial_inplace */
970 0x7ff8, /* src_mask */
971 0x7ff8, /* dst_mask */
972 FALSE
), /* pcrel_offset */
974 /* Get to the page for the GOT entry for the symbol
975 (G(S) - P) using an ADRP instruction. */
976 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21
), /* type */
978 2, /* size (0 = byte, 1 = short, 2 = long) */
980 TRUE
, /* pc_relative */
982 complain_overflow_dont
, /* complain_on_overflow */
983 bfd_elf_generic_reloc
, /* special_function */
984 AARCH64_R_STR (TLSGD_ADR_PAGE21
), /* name */
985 FALSE
, /* partial_inplace */
986 0x1fffff, /* src_mask */
987 0x1fffff, /* dst_mask */
988 TRUE
), /* pcrel_offset */
990 HOWTO (AARCH64_R (TLSGD_ADR_PREL21
), /* type */
992 2, /* size (0 = byte, 1 = short, 2 = long) */
994 TRUE
, /* pc_relative */
996 complain_overflow_dont
, /* complain_on_overflow */
997 bfd_elf_generic_reloc
, /* special_function */
998 AARCH64_R_STR (TLSGD_ADR_PREL21
), /* name */
999 FALSE
, /* partial_inplace */
1000 0x1fffff, /* src_mask */
1001 0x1fffff, /* dst_mask */
1002 TRUE
), /* pcrel_offset */
1004 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1005 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC
), /* type */
1007 2, /* size (0 = byte, 1 = short, 2 = long) */
1009 FALSE
, /* pc_relative */
1011 complain_overflow_dont
, /* complain_on_overflow */
1012 bfd_elf_generic_reloc
, /* special_function */
1013 AARCH64_R_STR (TLSGD_ADD_LO12_NC
), /* name */
1014 FALSE
, /* partial_inplace */
1015 0xfff, /* src_mask */
1016 0xfff, /* dst_mask */
1017 FALSE
), /* pcrel_offset */
1019 /* Lower 16 bits of GOT offset to tls_index. */
1020 HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC
), /* type */
1022 2, /* size (0 = byte, 1 = short, 2 = long) */
1024 FALSE
, /* pc_relative */
1026 complain_overflow_dont
, /* complain_on_overflow */
1027 bfd_elf_generic_reloc
, /* special_function */
1028 AARCH64_R_STR (TLSGD_MOVW_G0_NC
), /* name */
1029 FALSE
, /* partial_inplace */
1030 0xffff, /* src_mask */
1031 0xffff, /* dst_mask */
1032 FALSE
), /* pcrel_offset */
1034 /* Higher 16 bits of GOT offset to tls_index. */
1035 HOWTO64 (AARCH64_R (TLSGD_MOVW_G1
), /* type */
1036 16, /* rightshift */
1037 2, /* size (0 = byte, 1 = short, 2 = long) */
1039 FALSE
, /* pc_relative */
1041 complain_overflow_unsigned
, /* complain_on_overflow */
1042 bfd_elf_generic_reloc
, /* special_function */
1043 AARCH64_R_STR (TLSGD_MOVW_G1
), /* name */
1044 FALSE
, /* partial_inplace */
1045 0xffff, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE
), /* pcrel_offset */
1049 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21
), /* type */
1050 12, /* rightshift */
1051 2, /* size (0 = byte, 1 = short, 2 = long) */
1053 FALSE
, /* pc_relative */
1055 complain_overflow_dont
, /* complain_on_overflow */
1056 bfd_elf_generic_reloc
, /* special_function */
1057 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21
), /* name */
1058 FALSE
, /* partial_inplace */
1059 0x1fffff, /* src_mask */
1060 0x1fffff, /* dst_mask */
1061 FALSE
), /* pcrel_offset */
1063 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC
), /* type */
1065 2, /* size (0 = byte, 1 = short, 2 = long) */
1067 FALSE
, /* pc_relative */
1069 complain_overflow_dont
, /* complain_on_overflow */
1070 bfd_elf_generic_reloc
, /* special_function */
1071 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC
), /* name */
1072 FALSE
, /* partial_inplace */
1073 0xff8, /* src_mask */
1074 0xff8, /* dst_mask */
1075 FALSE
), /* pcrel_offset */
1077 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC
), /* type */
1079 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 FALSE
, /* pc_relative */
1083 complain_overflow_dont
, /* complain_on_overflow */
1084 bfd_elf_generic_reloc
, /* special_function */
1085 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC
), /* name */
1086 FALSE
, /* partial_inplace */
1087 0xffc, /* src_mask */
1088 0xffc, /* dst_mask */
1089 FALSE
), /* pcrel_offset */
1091 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19
), /* type */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 FALSE
, /* pc_relative */
1097 complain_overflow_dont
, /* complain_on_overflow */
1098 bfd_elf_generic_reloc
, /* special_function */
1099 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19
), /* name */
1100 FALSE
, /* partial_inplace */
1101 0x1ffffc, /* src_mask */
1102 0x1ffffc, /* dst_mask */
1103 FALSE
), /* pcrel_offset */
1105 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC
), /* type */
1107 2, /* size (0 = byte, 1 = short, 2 = long) */
1109 FALSE
, /* pc_relative */
1111 complain_overflow_dont
, /* complain_on_overflow */
1112 bfd_elf_generic_reloc
, /* special_function */
1113 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC
), /* name */
1114 FALSE
, /* partial_inplace */
1115 0xffff, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE
), /* pcrel_offset */
1119 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1
), /* type */
1120 16, /* rightshift */
1121 2, /* size (0 = byte, 1 = short, 2 = long) */
1123 FALSE
, /* pc_relative */
1125 complain_overflow_unsigned
, /* complain_on_overflow */
1126 bfd_elf_generic_reloc
, /* special_function */
1127 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1
), /* name */
1128 FALSE
, /* partial_inplace */
1129 0xffff, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE
), /* pcrel_offset */
1133 /* ADD: bit[23:12] of byte offset to module TLS base address. */
1134 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12
), /* type */
1135 12, /* rightshift */
1136 2, /* size (0 = byte, 1 = short, 2 = long) */
1138 FALSE
, /* pc_relative */
1140 complain_overflow_unsigned
, /* complain_on_overflow */
1141 bfd_elf_generic_reloc
, /* special_function */
1142 AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12
), /* name */
1143 FALSE
, /* partial_inplace */
1144 0xfff, /* src_mask */
1145 0xfff, /* dst_mask */
1146 FALSE
), /* pcrel_offset */
1148 /* Unsigned 12 bit byte offset to module TLS base address. */
1149 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12
), /* type */
1151 2, /* size (0 = byte, 1 = short, 2 = long) */
1153 FALSE
, /* pc_relative */
1155 complain_overflow_unsigned
, /* complain_on_overflow */
1156 bfd_elf_generic_reloc
, /* special_function */
1157 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12
), /* name */
1158 FALSE
, /* partial_inplace */
1159 0xfff, /* src_mask */
1160 0xfff, /* dst_mask */
1161 FALSE
), /* pcrel_offset */
1163 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1164 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC
), /* type */
1166 2, /* size (0 = byte, 1 = short, 2 = long) */
1168 FALSE
, /* pc_relative */
1170 complain_overflow_dont
, /* complain_on_overflow */
1171 bfd_elf_generic_reloc
, /* special_function */
1172 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC
), /* name */
1173 FALSE
, /* partial_inplace */
1174 0xfff, /* src_mask */
1175 0xfff, /* dst_mask */
1176 FALSE
), /* pcrel_offset */
1178 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1179 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC
), /* type */
1181 2, /* size (0 = byte, 1 = short, 2 = long) */
1183 FALSE
, /* pc_relative */
1185 complain_overflow_dont
, /* complain_on_overflow */
1186 bfd_elf_generic_reloc
, /* special_function */
1187 AARCH64_R_STR (TLSLD_ADD_LO12_NC
), /* name */
1188 FALSE
, /* partial_inplace */
1189 0xfff, /* src_mask */
1190 0xfff, /* dst_mask */
1191 FALSE
), /* pcrel_offset */
1193 /* Get to the page for the GOT entry for the symbol
1194 (G(S) - P) using an ADRP instruction. */
1195 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21
), /* type */
1196 12, /* rightshift */
1197 2, /* size (0 = byte, 1 = short, 2 = long) */
1199 TRUE
, /* pc_relative */
1201 complain_overflow_signed
, /* complain_on_overflow */
1202 bfd_elf_generic_reloc
, /* special_function */
1203 AARCH64_R_STR (TLSLD_ADR_PAGE21
), /* name */
1204 FALSE
, /* partial_inplace */
1205 0x1fffff, /* src_mask */
1206 0x1fffff, /* dst_mask */
1207 TRUE
), /* pcrel_offset */
1209 HOWTO (AARCH64_R (TLSLD_ADR_PREL21
), /* type */
1211 2, /* size (0 = byte, 1 = short, 2 = long) */
1213 TRUE
, /* pc_relative */
1215 complain_overflow_signed
, /* complain_on_overflow */
1216 bfd_elf_generic_reloc
, /* special_function */
1217 AARCH64_R_STR (TLSLD_ADR_PREL21
), /* name */
1218 FALSE
, /* partial_inplace */
1219 0x1fffff, /* src_mask */
1220 0x1fffff, /* dst_mask */
1221 TRUE
), /* pcrel_offset */
1223 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1224 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12
), /* type */
1226 2, /* size (0 = byte, 1 = short, 2 = long) */
1228 FALSE
, /* pc_relative */
1230 complain_overflow_unsigned
, /* complain_on_overflow */
1231 bfd_elf_generic_reloc
, /* special_function */
1232 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12
), /* name */
1233 FALSE
, /* partial_inplace */
1234 0x1ffc00, /* src_mask */
1235 0x1ffc00, /* dst_mask */
1236 FALSE
), /* pcrel_offset */
1238 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1239 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC
), /* type */
1241 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 FALSE
, /* pc_relative */
1245 complain_overflow_dont
, /* complain_on_overflow */
1246 bfd_elf_generic_reloc
, /* special_function */
1247 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC
), /* name */
1248 FALSE
, /* partial_inplace */
1249 0x1ffc00, /* src_mask */
1250 0x1ffc00, /* dst_mask */
1251 FALSE
), /* pcrel_offset */
1253 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1254 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12
), /* type */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1258 FALSE
, /* pc_relative */
1260 complain_overflow_unsigned
, /* complain_on_overflow */
1261 bfd_elf_generic_reloc
, /* special_function */
1262 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12
), /* name */
1263 FALSE
, /* partial_inplace */
1264 0x3ffc00, /* src_mask */
1265 0x3ffc00, /* dst_mask */
1266 FALSE
), /* pcrel_offset */
1268 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1269 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC
), /* type */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1273 FALSE
, /* pc_relative */
1275 complain_overflow_dont
, /* complain_on_overflow */
1276 bfd_elf_generic_reloc
, /* special_function */
1277 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC
), /* name */
1278 FALSE
, /* partial_inplace */
1279 0xffc00, /* src_mask */
1280 0xffc00, /* dst_mask */
1281 FALSE
), /* pcrel_offset */
1283 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1284 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12
), /* type */
1286 2, /* size (0 = byte, 1 = short, 2 = long) */
1288 FALSE
, /* pc_relative */
1290 complain_overflow_unsigned
, /* complain_on_overflow */
1291 bfd_elf_generic_reloc
, /* special_function */
1292 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12
), /* name */
1293 FALSE
, /* partial_inplace */
1294 0x3ffc00, /* src_mask */
1295 0x3ffc00, /* dst_mask */
1296 FALSE
), /* pcrel_offset */
1298 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1299 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC
), /* type */
1301 2, /* size (0 = byte, 1 = short, 2 = long) */
1303 FALSE
, /* pc_relative */
1305 complain_overflow_dont
, /* complain_on_overflow */
1306 bfd_elf_generic_reloc
, /* special_function */
1307 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC
), /* name */
1308 FALSE
, /* partial_inplace */
1309 0x7fc00, /* src_mask */
1310 0x7fc00, /* dst_mask */
1311 FALSE
), /* pcrel_offset */
1313 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1314 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12
), /* type */
1316 2, /* size (0 = byte, 1 = short, 2 = long) */
1318 FALSE
, /* pc_relative */
1320 complain_overflow_unsigned
, /* complain_on_overflow */
1321 bfd_elf_generic_reloc
, /* special_function */
1322 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12
), /* name */
1323 FALSE
, /* partial_inplace */
1324 0x3ffc00, /* src_mask */
1325 0x3ffc00, /* dst_mask */
1326 FALSE
), /* pcrel_offset */
1328 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1329 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC
), /* type */
1331 2, /* size (0 = byte, 1 = short, 2 = long) */
1333 FALSE
, /* pc_relative */
1335 complain_overflow_dont
, /* complain_on_overflow */
1336 bfd_elf_generic_reloc
, /* special_function */
1337 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC
), /* name */
1338 FALSE
, /* partial_inplace */
1339 0x3ffc00, /* src_mask */
1340 0x3ffc00, /* dst_mask */
1341 FALSE
), /* pcrel_offset */
1343 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1344 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0
), /* type */
1346 2, /* size (0 = byte, 1 = short, 2 = long) */
1348 FALSE
, /* pc_relative */
1350 complain_overflow_unsigned
, /* complain_on_overflow */
1351 bfd_elf_generic_reloc
, /* special_function */
1352 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0
), /* name */
1353 FALSE
, /* partial_inplace */
1354 0xffff, /* src_mask */
1355 0xffff, /* dst_mask */
1356 FALSE
), /* pcrel_offset */
1358 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1359 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC
), /* type */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1363 FALSE
, /* pc_relative */
1365 complain_overflow_dont
, /* complain_on_overflow */
1366 bfd_elf_generic_reloc
, /* special_function */
1367 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC
), /* name */
1368 FALSE
, /* partial_inplace */
1369 0xffff, /* src_mask */
1370 0xffff, /* dst_mask */
1371 FALSE
), /* pcrel_offset */
1373 /* MOVZ: bit[31:16] of byte offset to module TLS base address. */
1374 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1
), /* type */
1375 16, /* rightshift */
1376 2, /* size (0 = byte, 1 = short, 2 = long) */
1378 FALSE
, /* pc_relative */
1380 complain_overflow_unsigned
, /* complain_on_overflow */
1381 bfd_elf_generic_reloc
, /* special_function */
1382 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1
), /* name */
1383 FALSE
, /* partial_inplace */
1384 0xffff, /* src_mask */
1385 0xffff, /* dst_mask */
1386 FALSE
), /* pcrel_offset */
1388 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */
1389 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC
), /* type */
1390 16, /* rightshift */
1391 2, /* size (0 = byte, 1 = short, 2 = long) */
1393 FALSE
, /* pc_relative */
1395 complain_overflow_dont
, /* complain_on_overflow */
1396 bfd_elf_generic_reloc
, /* special_function */
1397 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC
), /* name */
1398 FALSE
, /* partial_inplace */
1399 0xffff, /* src_mask */
1400 0xffff, /* dst_mask */
1401 FALSE
), /* pcrel_offset */
1403 /* MOVZ: bit[47:32] of byte offset to module TLS base address. */
1404 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2
), /* type */
1405 32, /* rightshift */
1406 2, /* size (0 = byte, 1 = short, 2 = long) */
1408 FALSE
, /* pc_relative */
1410 complain_overflow_unsigned
, /* complain_on_overflow */
1411 bfd_elf_generic_reloc
, /* special_function */
1412 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2
), /* name */
1413 FALSE
, /* partial_inplace */
1414 0xffff, /* src_mask */
1415 0xffff, /* dst_mask */
1416 FALSE
), /* pcrel_offset */
1418 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2
), /* type */
1419 32, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1422 FALSE
, /* pc_relative */
1424 complain_overflow_unsigned
, /* complain_on_overflow */
1425 bfd_elf_generic_reloc
, /* special_function */
1426 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2
), /* name */
1427 FALSE
, /* partial_inplace */
1428 0xffff, /* src_mask */
1429 0xffff, /* dst_mask */
1430 FALSE
), /* pcrel_offset */
1432 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1
), /* type */
1433 16, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 FALSE
, /* pc_relative */
1438 complain_overflow_dont
, /* complain_on_overflow */
1439 bfd_elf_generic_reloc
, /* special_function */
1440 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1
), /* name */
1441 FALSE
, /* partial_inplace */
1442 0xffff, /* src_mask */
1443 0xffff, /* dst_mask */
1444 FALSE
), /* pcrel_offset */
1446 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC
), /* type */
1447 16, /* rightshift */
1448 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 FALSE
, /* pc_relative */
1452 complain_overflow_dont
, /* complain_on_overflow */
1453 bfd_elf_generic_reloc
, /* special_function */
1454 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC
), /* name */
1455 FALSE
, /* partial_inplace */
1456 0xffff, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE
), /* pcrel_offset */
1460 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0
), /* type */
1462 2, /* size (0 = byte, 1 = short, 2 = long) */
1464 FALSE
, /* pc_relative */
1466 complain_overflow_dont
, /* complain_on_overflow */
1467 bfd_elf_generic_reloc
, /* special_function */
1468 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0
), /* name */
1469 FALSE
, /* partial_inplace */
1470 0xffff, /* src_mask */
1471 0xffff, /* dst_mask */
1472 FALSE
), /* pcrel_offset */
1474 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
), /* type */
1476 2, /* size (0 = byte, 1 = short, 2 = long) */
1478 FALSE
, /* pc_relative */
1480 complain_overflow_dont
, /* complain_on_overflow */
1481 bfd_elf_generic_reloc
, /* special_function */
1482 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC
), /* name */
1483 FALSE
, /* partial_inplace */
1484 0xffff, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE
), /* pcrel_offset */
1488 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12
), /* type */
1489 12, /* rightshift */
1490 2, /* size (0 = byte, 1 = short, 2 = long) */
1492 FALSE
, /* pc_relative */
1494 complain_overflow_unsigned
, /* complain_on_overflow */
1495 bfd_elf_generic_reloc
, /* special_function */
1496 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12
), /* name */
1497 FALSE
, /* partial_inplace */
1498 0xfff, /* src_mask */
1499 0xfff, /* dst_mask */
1500 FALSE
), /* pcrel_offset */
1502 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12
), /* type */
1504 2, /* size (0 = byte, 1 = short, 2 = long) */
1506 FALSE
, /* pc_relative */
1508 complain_overflow_unsigned
, /* complain_on_overflow */
1509 bfd_elf_generic_reloc
, /* special_function */
1510 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12
), /* name */
1511 FALSE
, /* partial_inplace */
1512 0xfff, /* src_mask */
1513 0xfff, /* dst_mask */
1514 FALSE
), /* pcrel_offset */
1516 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
), /* type */
1518 2, /* size (0 = byte, 1 = short, 2 = long) */
1520 FALSE
, /* pc_relative */
1522 complain_overflow_dont
, /* complain_on_overflow */
1523 bfd_elf_generic_reloc
, /* special_function */
1524 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC
), /* name */
1525 FALSE
, /* partial_inplace */
1526 0xfff, /* src_mask */
1527 0xfff, /* dst_mask */
1528 FALSE
), /* pcrel_offset */
1530 HOWTO (AARCH64_R (TLSDESC_LD_PREL19
), /* type */
1532 2, /* size (0 = byte, 1 = short, 2 = long) */
1534 TRUE
, /* pc_relative */
1536 complain_overflow_dont
, /* complain_on_overflow */
1537 bfd_elf_generic_reloc
, /* special_function */
1538 AARCH64_R_STR (TLSDESC_LD_PREL19
), /* name */
1539 FALSE
, /* partial_inplace */
1540 0x0ffffe0, /* src_mask */
1541 0x0ffffe0, /* dst_mask */
1542 TRUE
), /* pcrel_offset */
1544 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21
), /* type */
1546 2, /* size (0 = byte, 1 = short, 2 = long) */
1548 TRUE
, /* pc_relative */
1550 complain_overflow_dont
, /* complain_on_overflow */
1551 bfd_elf_generic_reloc
, /* special_function */
1552 AARCH64_R_STR (TLSDESC_ADR_PREL21
), /* name */
1553 FALSE
, /* partial_inplace */
1554 0x1fffff, /* src_mask */
1555 0x1fffff, /* dst_mask */
1556 TRUE
), /* pcrel_offset */
1558 /* Get to the page for the GOT entry for the symbol
1559 (G(S) - P) using an ADRP instruction. */
1560 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21
), /* type */
1561 12, /* rightshift */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1564 TRUE
, /* pc_relative */
1566 complain_overflow_dont
, /* complain_on_overflow */
1567 bfd_elf_generic_reloc
, /* special_function */
1568 AARCH64_R_STR (TLSDESC_ADR_PAGE21
), /* name */
1569 FALSE
, /* partial_inplace */
1570 0x1fffff, /* src_mask */
1571 0x1fffff, /* dst_mask */
1572 TRUE
), /* pcrel_offset */
1574 /* LD64: GOT offset G(S) & 0xff8. */
1575 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12
), /* type */
1577 2, /* size (0 = byte, 1 = short, 2 = long) */
1579 FALSE
, /* pc_relative */
1581 complain_overflow_dont
, /* complain_on_overflow */
1582 bfd_elf_generic_reloc
, /* special_function */
1583 AARCH64_R_STR (TLSDESC_LD64_LO12
), /* name */
1584 FALSE
, /* partial_inplace */
1585 0xff8, /* src_mask */
1586 0xff8, /* dst_mask */
1587 FALSE
), /* pcrel_offset */
1589 /* LD32: GOT offset G(S) & 0xffc. */
1590 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC
), /* type */
1592 2, /* size (0 = byte, 1 = short, 2 = long) */
1594 FALSE
, /* pc_relative */
1596 complain_overflow_dont
, /* complain_on_overflow */
1597 bfd_elf_generic_reloc
, /* special_function */
1598 AARCH64_R_STR (TLSDESC_LD32_LO12_NC
), /* name */
1599 FALSE
, /* partial_inplace */
1600 0xffc, /* src_mask */
1601 0xffc, /* dst_mask */
1602 FALSE
), /* pcrel_offset */
1604 /* ADD: GOT offset G(S) & 0xfff. */
1605 HOWTO (AARCH64_R (TLSDESC_ADD_LO12
), /* type */
1607 2, /* size (0 = byte, 1 = short, 2 = long) */
1609 FALSE
, /* pc_relative */
1611 complain_overflow_dont
,/* complain_on_overflow */
1612 bfd_elf_generic_reloc
, /* special_function */
1613 AARCH64_R_STR (TLSDESC_ADD_LO12
), /* name */
1614 FALSE
, /* partial_inplace */
1615 0xfff, /* src_mask */
1616 0xfff, /* dst_mask */
1617 FALSE
), /* pcrel_offset */
1619 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1
), /* type */
1620 16, /* rightshift */
1621 2, /* size (0 = byte, 1 = short, 2 = long) */
1623 FALSE
, /* pc_relative */
1625 complain_overflow_unsigned
, /* complain_on_overflow */
1626 bfd_elf_generic_reloc
, /* special_function */
1627 AARCH64_R_STR (TLSDESC_OFF_G1
), /* name */
1628 FALSE
, /* partial_inplace */
1629 0xffff, /* src_mask */
1630 0xffff, /* dst_mask */
1631 FALSE
), /* pcrel_offset */
1633 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC
), /* type */
1635 2, /* size (0 = byte, 1 = short, 2 = long) */
1637 FALSE
, /* pc_relative */
1639 complain_overflow_dont
, /* complain_on_overflow */
1640 bfd_elf_generic_reloc
, /* special_function */
1641 AARCH64_R_STR (TLSDESC_OFF_G0_NC
), /* name */
1642 FALSE
, /* partial_inplace */
1643 0xffff, /* src_mask */
1644 0xffff, /* dst_mask */
1645 FALSE
), /* pcrel_offset */
1647 HOWTO64 (AARCH64_R (TLSDESC_LDR
), /* type */
1649 2, /* size (0 = byte, 1 = short, 2 = long) */
1651 FALSE
, /* pc_relative */
1653 complain_overflow_dont
, /* complain_on_overflow */
1654 bfd_elf_generic_reloc
, /* special_function */
1655 AARCH64_R_STR (TLSDESC_LDR
), /* name */
1656 FALSE
, /* partial_inplace */
1659 FALSE
), /* pcrel_offset */
1661 HOWTO64 (AARCH64_R (TLSDESC_ADD
), /* type */
1663 2, /* size (0 = byte, 1 = short, 2 = long) */
1665 FALSE
, /* pc_relative */
1667 complain_overflow_dont
, /* complain_on_overflow */
1668 bfd_elf_generic_reloc
, /* special_function */
1669 AARCH64_R_STR (TLSDESC_ADD
), /* name */
1670 FALSE
, /* partial_inplace */
1673 FALSE
), /* pcrel_offset */
1675 HOWTO (AARCH64_R (TLSDESC_CALL
), /* type */
1677 2, /* size (0 = byte, 1 = short, 2 = long) */
1679 FALSE
, /* pc_relative */
1681 complain_overflow_dont
, /* complain_on_overflow */
1682 bfd_elf_generic_reloc
, /* special_function */
1683 AARCH64_R_STR (TLSDESC_CALL
), /* name */
1684 FALSE
, /* partial_inplace */
1687 FALSE
), /* pcrel_offset */
1689 HOWTO (AARCH64_R (COPY
), /* type */
1691 2, /* size (0 = byte, 1 = short, 2 = long) */
1693 FALSE
, /* pc_relative */
1695 complain_overflow_bitfield
, /* complain_on_overflow */
1696 bfd_elf_generic_reloc
, /* special_function */
1697 AARCH64_R_STR (COPY
), /* name */
1698 TRUE
, /* partial_inplace */
1699 0xffffffff, /* src_mask */
1700 0xffffffff, /* dst_mask */
1701 FALSE
), /* pcrel_offset */
1703 HOWTO (AARCH64_R (GLOB_DAT
), /* type */
1705 2, /* size (0 = byte, 1 = short, 2 = long) */
1707 FALSE
, /* pc_relative */
1709 complain_overflow_bitfield
, /* complain_on_overflow */
1710 bfd_elf_generic_reloc
, /* special_function */
1711 AARCH64_R_STR (GLOB_DAT
), /* name */
1712 TRUE
, /* partial_inplace */
1713 0xffffffff, /* src_mask */
1714 0xffffffff, /* dst_mask */
1715 FALSE
), /* pcrel_offset */
1717 HOWTO (AARCH64_R (JUMP_SLOT
), /* type */
1719 2, /* size (0 = byte, 1 = short, 2 = long) */
1721 FALSE
, /* pc_relative */
1723 complain_overflow_bitfield
, /* complain_on_overflow */
1724 bfd_elf_generic_reloc
, /* special_function */
1725 AARCH64_R_STR (JUMP_SLOT
), /* name */
1726 TRUE
, /* partial_inplace */
1727 0xffffffff, /* src_mask */
1728 0xffffffff, /* dst_mask */
1729 FALSE
), /* pcrel_offset */
1731 HOWTO (AARCH64_R (RELATIVE
), /* type */
1733 2, /* size (0 = byte, 1 = short, 2 = long) */
1735 FALSE
, /* pc_relative */
1737 complain_overflow_bitfield
, /* complain_on_overflow */
1738 bfd_elf_generic_reloc
, /* special_function */
1739 AARCH64_R_STR (RELATIVE
), /* name */
1740 TRUE
, /* partial_inplace */
1741 ALL_ONES
, /* src_mask */
1742 ALL_ONES
, /* dst_mask */
1743 FALSE
), /* pcrel_offset */
1745 HOWTO (AARCH64_R (TLS_DTPMOD
), /* type */
1747 2, /* size (0 = byte, 1 = short, 2 = long) */
1749 FALSE
, /* pc_relative */
1751 complain_overflow_dont
, /* complain_on_overflow */
1752 bfd_elf_generic_reloc
, /* special_function */
1754 AARCH64_R_STR (TLS_DTPMOD64
), /* name */
1756 AARCH64_R_STR (TLS_DTPMOD
), /* name */
1758 FALSE
, /* partial_inplace */
1760 ALL_ONES
, /* dst_mask */
1761 FALSE
), /* pc_reloffset */
1763 HOWTO (AARCH64_R (TLS_DTPREL
), /* type */
1765 2, /* size (0 = byte, 1 = short, 2 = long) */
1767 FALSE
, /* pc_relative */
1769 complain_overflow_dont
, /* complain_on_overflow */
1770 bfd_elf_generic_reloc
, /* special_function */
1772 AARCH64_R_STR (TLS_DTPREL64
), /* name */
1774 AARCH64_R_STR (TLS_DTPREL
), /* name */
1776 FALSE
, /* partial_inplace */
1778 ALL_ONES
, /* dst_mask */
1779 FALSE
), /* pcrel_offset */
1781 HOWTO (AARCH64_R (TLS_TPREL
), /* type */
1783 2, /* size (0 = byte, 1 = short, 2 = long) */
1785 FALSE
, /* pc_relative */
1787 complain_overflow_dont
, /* complain_on_overflow */
1788 bfd_elf_generic_reloc
, /* special_function */
1790 AARCH64_R_STR (TLS_TPREL64
), /* name */
1792 AARCH64_R_STR (TLS_TPREL
), /* name */
1794 FALSE
, /* partial_inplace */
1796 ALL_ONES
, /* dst_mask */
1797 FALSE
), /* pcrel_offset */
1799 HOWTO (AARCH64_R (TLSDESC
), /* type */
1801 2, /* size (0 = byte, 1 = short, 2 = long) */
1803 FALSE
, /* pc_relative */
1805 complain_overflow_dont
, /* complain_on_overflow */
1806 bfd_elf_generic_reloc
, /* special_function */
1807 AARCH64_R_STR (TLSDESC
), /* name */
1808 FALSE
, /* partial_inplace */
1810 ALL_ONES
, /* dst_mask */
1811 FALSE
), /* pcrel_offset */
1813 HOWTO (AARCH64_R (IRELATIVE
), /* type */
1815 2, /* size (0 = byte, 1 = short, 2 = long) */
1817 FALSE
, /* pc_relative */
1819 complain_overflow_bitfield
, /* complain_on_overflow */
1820 bfd_elf_generic_reloc
, /* special_function */
1821 AARCH64_R_STR (IRELATIVE
), /* name */
1822 FALSE
, /* partial_inplace */
1824 ALL_ONES
, /* dst_mask */
1825 FALSE
), /* pcrel_offset */
1830 static reloc_howto_type elfNN_aarch64_howto_none
=
1831 HOWTO (R_AARCH64_NONE
, /* type */
1833 3, /* size (0 = byte, 1 = short, 2 = long) */
1835 FALSE
, /* pc_relative */
1837 complain_overflow_dont
,/* complain_on_overflow */
1838 bfd_elf_generic_reloc
, /* special_function */
1839 "R_AARCH64_NONE", /* name */
1840 FALSE
, /* partial_inplace */
1843 FALSE
); /* pcrel_offset */
1845 /* Given HOWTO, return the bfd internal relocation enumerator. */
1847 static bfd_reloc_code_real_type
1848 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type
*howto
)
1851 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table
);
1852 const ptrdiff_t offset
1853 = howto
- elfNN_aarch64_howto_table
;
1855 if (offset
> 0 && offset
< size
- 1)
1856 return BFD_RELOC_AARCH64_RELOC_START
+ offset
;
1858 if (howto
== &elfNN_aarch64_howto_none
)
1859 return BFD_RELOC_AARCH64_NONE
;
1861 return BFD_RELOC_AARCH64_RELOC_START
;
1864 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1866 static bfd_reloc_code_real_type
1867 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type
)
1869 static bfd_boolean initialized_p
= FALSE
;
1870 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1871 static unsigned int offsets
[R_AARCH64_end
];
1877 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
1878 if (elfNN_aarch64_howto_table
[i
].type
!= 0)
1879 offsets
[elfNN_aarch64_howto_table
[i
].type
] = i
;
1881 initialized_p
= TRUE
;
1884 if (r_type
== R_AARCH64_NONE
|| r_type
== R_AARCH64_NULL
)
1885 return BFD_RELOC_AARCH64_NONE
;
1887 /* PR 17512: file: b371e70a. */
1888 if (r_type
>= R_AARCH64_end
)
1890 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type
);
1891 bfd_set_error (bfd_error_bad_value
);
1892 return BFD_RELOC_AARCH64_NONE
;
1895 return BFD_RELOC_AARCH64_RELOC_START
+ offsets
[r_type
];
1898 struct elf_aarch64_reloc_map
1900 bfd_reloc_code_real_type from
;
1901 bfd_reloc_code_real_type to
;
1904 /* Map bfd generic reloc to AArch64-specific reloc. */
1905 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map
[] =
1907 {BFD_RELOC_NONE
, BFD_RELOC_AARCH64_NONE
},
1909 /* Basic data relocations. */
1910 {BFD_RELOC_CTOR
, BFD_RELOC_AARCH64_NN
},
1911 {BFD_RELOC_64
, BFD_RELOC_AARCH64_64
},
1912 {BFD_RELOC_32
, BFD_RELOC_AARCH64_32
},
1913 {BFD_RELOC_16
, BFD_RELOC_AARCH64_16
},
1914 {BFD_RELOC_64_PCREL
, BFD_RELOC_AARCH64_64_PCREL
},
1915 {BFD_RELOC_32_PCREL
, BFD_RELOC_AARCH64_32_PCREL
},
1916 {BFD_RELOC_16_PCREL
, BFD_RELOC_AARCH64_16_PCREL
},
1919 /* Given the bfd internal relocation enumerator in CODE, return the
1920 corresponding howto entry. */
1922 static reloc_howto_type
*
1923 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code
)
1927 /* Convert bfd generic reloc to AArch64-specific reloc. */
1928 if (code
< BFD_RELOC_AARCH64_RELOC_START
1929 || code
> BFD_RELOC_AARCH64_RELOC_END
)
1930 for (i
= 0; i
< ARRAY_SIZE (elf_aarch64_reloc_map
); i
++)
1931 if (elf_aarch64_reloc_map
[i
].from
== code
)
1933 code
= elf_aarch64_reloc_map
[i
].to
;
1937 if (code
> BFD_RELOC_AARCH64_RELOC_START
1938 && code
< BFD_RELOC_AARCH64_RELOC_END
)
1939 if (elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
].type
)
1940 return &elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
];
1942 if (code
== BFD_RELOC_AARCH64_NONE
)
1943 return &elfNN_aarch64_howto_none
;
1948 static reloc_howto_type
*
1949 elfNN_aarch64_howto_from_type (unsigned int r_type
)
1951 bfd_reloc_code_real_type val
;
1952 reloc_howto_type
*howto
;
1957 bfd_set_error (bfd_error_bad_value
);
1962 if (r_type
== R_AARCH64_NONE
)
1963 return &elfNN_aarch64_howto_none
;
1965 val
= elfNN_aarch64_bfd_reloc_from_type (r_type
);
1966 howto
= elfNN_aarch64_howto_from_bfd_reloc (val
);
1971 bfd_set_error (bfd_error_bad_value
);
1976 elfNN_aarch64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*bfd_reloc
,
1977 Elf_Internal_Rela
*elf_reloc
)
1979 unsigned int r_type
;
1981 r_type
= ELFNN_R_TYPE (elf_reloc
->r_info
);
1982 bfd_reloc
->howto
= elfNN_aarch64_howto_from_type (r_type
);
1985 static reloc_howto_type
*
1986 elfNN_aarch64_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1987 bfd_reloc_code_real_type code
)
1989 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (code
);
1994 bfd_set_error (bfd_error_bad_value
);
1998 static reloc_howto_type
*
1999 elfNN_aarch64_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
2004 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
2005 if (elfNN_aarch64_howto_table
[i
].name
!= NULL
2006 && strcasecmp (elfNN_aarch64_howto_table
[i
].name
, r_name
) == 0)
2007 return &elfNN_aarch64_howto_table
[i
];
2012 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
2013 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
2014 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
2015 #define TARGET_BIG_NAME "elfNN-bigaarch64"
2017 /* The linker script knows the section names for placement.
2018 The entry_names are used to do simple name mangling on the stubs.
2019 Given a function name, and its type, the stub can be found. The
2020 name can be changed. The only requirement is the %s be present. */
2021 #define STUB_ENTRY_NAME "__%s_veneer"
2023 /* The name of the dynamic interpreter. This is put in the .interp
2025 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
2027 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
2028 (((1 << 25) - 1) << 2)
2029 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
2032 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
2033 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
2036 aarch64_valid_for_adrp_p (bfd_vma value
, bfd_vma place
)
2038 bfd_signed_vma offset
= (bfd_signed_vma
) (PG (value
) - PG (place
)) >> 12;
2039 return offset
<= AARCH64_MAX_ADRP_IMM
&& offset
>= AARCH64_MIN_ADRP_IMM
;
2043 aarch64_valid_branch_p (bfd_vma value
, bfd_vma place
)
2045 bfd_signed_vma offset
= (bfd_signed_vma
) (value
- place
);
2046 return (offset
<= AARCH64_MAX_FWD_BRANCH_OFFSET
2047 && offset
>= AARCH64_MAX_BWD_BRANCH_OFFSET
);
2050 static const uint32_t aarch64_adrp_branch_stub
[] =
2052 0x90000010, /* adrp ip0, X */
2053 /* R_AARCH64_ADR_HI21_PCREL(X) */
2054 0x91000210, /* add ip0, ip0, :lo12:X */
2055 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
2056 0xd61f0200, /* br ip0 */
2059 static const uint32_t aarch64_long_branch_stub
[] =
2062 0x58000090, /* ldr ip0, 1f */
2064 0x18000090, /* ldr wip0, 1f */
2066 0x10000011, /* adr ip1, #0 */
2067 0x8b110210, /* add ip0, ip0, ip1 */
2068 0xd61f0200, /* br ip0 */
2069 0x00000000, /* 1: .xword or .word
2070 R_AARCH64_PRELNN(X) + 12
2075 static const uint32_t aarch64_erratum_835769_stub
[] =
2077 0x00000000, /* Placeholder for multiply accumulate. */
2078 0x14000000, /* b <label> */
2081 static const uint32_t aarch64_erratum_843419_stub
[] =
2083 0x00000000, /* Placeholder for LDR instruction. */
2084 0x14000000, /* b <label> */
2087 /* Section name for stubs is the associated section name plus this
2089 #define STUB_SUFFIX ".stub"
2091 enum elf_aarch64_stub_type
2094 aarch64_stub_adrp_branch
,
2095 aarch64_stub_long_branch
,
2096 aarch64_stub_erratum_835769_veneer
,
2097 aarch64_stub_erratum_843419_veneer
,
2100 struct elf_aarch64_stub_hash_entry
2102 /* Base hash table entry structure. */
2103 struct bfd_hash_entry root
;
2105 /* The stub section. */
2108 /* Offset within stub_sec of the beginning of this stub. */
2109 bfd_vma stub_offset
;
2111 /* Given the symbol's value and its section we can determine its final
2112 value when building the stubs (so the stub knows where to jump). */
2113 bfd_vma target_value
;
2114 asection
*target_section
;
2116 enum elf_aarch64_stub_type stub_type
;
2118 /* The symbol table entry, if any, that this was derived from. */
2119 struct elf_aarch64_link_hash_entry
*h
;
2121 /* Destination symbol type */
2122 unsigned char st_type
;
2124 /* Where this stub is being called from, or, in the case of combined
2125 stub sections, the first input section in the group. */
2128 /* The name for the local symbol at the start of this stub. The
2129 stub name in the hash table has to be unique; this does not, so
2130 it can be friendlier. */
2133 /* The instruction which caused this stub to be generated (only valid for
2134 erratum 835769 workaround stubs at present). */
2135 uint32_t veneered_insn
;
2137 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2138 bfd_vma adrp_offset
;
2141 /* Used to build a map of a section. This is required for mixed-endian
2144 typedef struct elf_elf_section_map
2149 elf_aarch64_section_map
;
2152 typedef struct _aarch64_elf_section_data
2154 struct bfd_elf_section_data elf
;
2155 unsigned int mapcount
;
2156 unsigned int mapsize
;
2157 elf_aarch64_section_map
*map
;
2159 _aarch64_elf_section_data
;
2161 #define elf_aarch64_section_data(sec) \
2162 ((_aarch64_elf_section_data *) elf_section_data (sec))
2164 /* The size of the thread control block which is defined to be two pointers. */
2165 #define TCB_SIZE (ARCH_SIZE/8)*2
2167 struct elf_aarch64_local_symbol
2169 unsigned int got_type
;
2170 bfd_signed_vma got_refcount
;
2173 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
2174 offset is from the end of the jump table and reserved entries
2177 The magic value (bfd_vma) -1 indicates that an offset has not be
2179 bfd_vma tlsdesc_got_jump_table_offset
;
2182 struct elf_aarch64_obj_tdata
2184 struct elf_obj_tdata root
;
2186 /* local symbol descriptors */
2187 struct elf_aarch64_local_symbol
*locals
;
2189 /* Zero to warn when linking objects with incompatible enum sizes. */
2190 int no_enum_size_warning
;
2192 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2193 int no_wchar_size_warning
;
2196 #define elf_aarch64_tdata(bfd) \
2197 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2199 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2201 #define is_aarch64_elf(bfd) \
2202 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2203 && elf_tdata (bfd) != NULL \
2204 && elf_object_id (bfd) == AARCH64_ELF_DATA)
2207 elfNN_aarch64_mkobject (bfd
*abfd
)
2209 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_aarch64_obj_tdata
),
2213 #define elf_aarch64_hash_entry(ent) \
2214 ((struct elf_aarch64_link_hash_entry *)(ent))
2216 #define GOT_UNKNOWN 0
2217 #define GOT_NORMAL 1
2218 #define GOT_TLS_GD 2
2219 #define GOT_TLS_IE 4
2220 #define GOT_TLSDESC_GD 8
2222 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2224 /* AArch64 ELF linker hash entry. */
2225 struct elf_aarch64_link_hash_entry
2227 struct elf_link_hash_entry root
;
2229 /* Track dynamic relocs copied for this symbol. */
2230 struct elf_dyn_relocs
*dyn_relocs
;
2232 /* Since PLT entries have variable size, we need to record the
2233 index into .got.plt instead of recomputing it from the PLT
2235 bfd_signed_vma plt_got_offset
;
2237 /* Bit mask representing the type of GOT entry(s) if any required by
2239 unsigned int got_type
;
2241 /* A pointer to the most recently used stub hash entry against this
2243 struct elf_aarch64_stub_hash_entry
*stub_cache
;
2245 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
2246 is from the end of the jump table and reserved entries within the PLTGOT.
2248 The magic value (bfd_vma) -1 indicates that an offset has not
2250 bfd_vma tlsdesc_got_jump_table_offset
;
2254 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry
*h
,
2256 unsigned long r_symndx
)
2259 return elf_aarch64_hash_entry (h
)->got_type
;
2261 if (! elf_aarch64_locals (abfd
))
2264 return elf_aarch64_locals (abfd
)[r_symndx
].got_type
;
2267 /* Get the AArch64 elf linker hash table from a link_info structure. */
2268 #define elf_aarch64_hash_table(info) \
2269 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
2271 #define aarch64_stub_hash_lookup(table, string, create, copy) \
2272 ((struct elf_aarch64_stub_hash_entry *) \
2273 bfd_hash_lookup ((table), (string), (create), (copy)))
2275 /* AArch64 ELF linker hash table. */
2276 struct elf_aarch64_link_hash_table
2278 /* The main hash table. */
2279 struct elf_link_hash_table root
;
2281 /* Nonzero to force PIC branch veneers. */
2284 /* Fix erratum 835769. */
2285 int fix_erratum_835769
;
2287 /* Fix erratum 843419. */
2288 int fix_erratum_843419
;
2290 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
2291 int fix_erratum_843419_adr
;
2293 /* Don't apply link-time values for dynamic relocations. */
2294 int no_apply_dynamic_relocs
;
2296 /* The number of bytes in the initial entry in the PLT. */
2297 bfd_size_type plt_header_size
;
2299 /* The number of bytes in the subsequent PLT etries. */
2300 bfd_size_type plt_entry_size
;
2302 /* Small local sym cache. */
2303 struct sym_cache sym_cache
;
2305 /* For convenience in allocate_dynrelocs. */
2308 /* The amount of space used by the reserved portion of the sgotplt
2309 section, plus whatever space is used by the jump slots. */
2310 bfd_vma sgotplt_jump_table_size
;
2312 /* The stub hash table. */
2313 struct bfd_hash_table stub_hash_table
;
2315 /* Linker stub bfd. */
2318 /* Linker call-backs. */
2319 asection
*(*add_stub_section
) (const char *, asection
*);
2320 void (*layout_sections_again
) (void);
2322 /* Array to keep track of which stub sections have been created, and
2323 information on stub grouping. */
2326 /* This is the section to which stubs in the group will be
2329 /* The stub section. */
2333 /* Assorted information used by elfNN_aarch64_size_stubs. */
2334 unsigned int bfd_count
;
2335 unsigned int top_index
;
2336 asection
**input_list
;
2338 /* The offset into splt of the PLT entry for the TLS descriptor
2339 resolver. Special values are 0, if not necessary (or not found
2340 to be necessary yet), and -1 if needed but not determined
2342 bfd_vma tlsdesc_plt
;
2344 /* The GOT offset for the lazy trampoline. Communicated to the
2345 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
2346 indicates an offset is not allocated. */
2347 bfd_vma dt_tlsdesc_got
;
2349 /* Used by local STT_GNU_IFUNC symbols. */
2350 htab_t loc_hash_table
;
2351 void * loc_hash_memory
;
2354 /* Create an entry in an AArch64 ELF linker hash table. */
2356 static struct bfd_hash_entry
*
2357 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
2358 struct bfd_hash_table
*table
,
2361 struct elf_aarch64_link_hash_entry
*ret
=
2362 (struct elf_aarch64_link_hash_entry
*) entry
;
2364 /* Allocate the structure if it has not already been allocated by a
2367 ret
= bfd_hash_allocate (table
,
2368 sizeof (struct elf_aarch64_link_hash_entry
));
2370 return (struct bfd_hash_entry
*) ret
;
2372 /* Call the allocation method of the superclass. */
2373 ret
= ((struct elf_aarch64_link_hash_entry
*)
2374 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2378 ret
->dyn_relocs
= NULL
;
2379 ret
->got_type
= GOT_UNKNOWN
;
2380 ret
->plt_got_offset
= (bfd_vma
) - 1;
2381 ret
->stub_cache
= NULL
;
2382 ret
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
2385 return (struct bfd_hash_entry
*) ret
;
2388 /* Initialize an entry in the stub hash table. */
2390 static struct bfd_hash_entry
*
2391 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2392 struct bfd_hash_table
*table
, const char *string
)
2394 /* Allocate the structure if it has not already been allocated by a
2398 entry
= bfd_hash_allocate (table
,
2400 elf_aarch64_stub_hash_entry
));
2405 /* Call the allocation method of the superclass. */
2406 entry
= bfd_hash_newfunc (entry
, table
, string
);
2409 struct elf_aarch64_stub_hash_entry
*eh
;
2411 /* Initialize the local fields. */
2412 eh
= (struct elf_aarch64_stub_hash_entry
*) entry
;
2413 eh
->adrp_offset
= 0;
2414 eh
->stub_sec
= NULL
;
2415 eh
->stub_offset
= 0;
2416 eh
->target_value
= 0;
2417 eh
->target_section
= NULL
;
2418 eh
->stub_type
= aarch64_stub_none
;
2426 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2427 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2428 as global symbol. We reuse indx and dynstr_index for local symbol
2429 hash since they aren't used by global symbols in this backend. */
2432 elfNN_aarch64_local_htab_hash (const void *ptr
)
2434 struct elf_link_hash_entry
*h
2435 = (struct elf_link_hash_entry
*) ptr
;
2436 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
2439 /* Compare local hash entries. */
2442 elfNN_aarch64_local_htab_eq (const void *ptr1
, const void *ptr2
)
2444 struct elf_link_hash_entry
*h1
2445 = (struct elf_link_hash_entry
*) ptr1
;
2446 struct elf_link_hash_entry
*h2
2447 = (struct elf_link_hash_entry
*) ptr2
;
2449 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
2452 /* Find and/or create a hash entry for local symbol. */
2454 static struct elf_link_hash_entry
*
2455 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table
*htab
,
2456 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
2459 struct elf_aarch64_link_hash_entry e
, *ret
;
2460 asection
*sec
= abfd
->sections
;
2461 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
2462 ELFNN_R_SYM (rel
->r_info
));
2465 e
.root
.indx
= sec
->id
;
2466 e
.root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2467 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
2468 create
? INSERT
: NO_INSERT
);
2475 ret
= (struct elf_aarch64_link_hash_entry
*) *slot
;
2479 ret
= (struct elf_aarch64_link_hash_entry
*)
2480 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
2481 sizeof (struct elf_aarch64_link_hash_entry
));
2484 memset (ret
, 0, sizeof (*ret
));
2485 ret
->root
.indx
= sec
->id
;
2486 ret
->root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2487 ret
->root
.dynindx
= -1;
2493 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2496 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info
*info
,
2497 struct elf_link_hash_entry
*dir
,
2498 struct elf_link_hash_entry
*ind
)
2500 struct elf_aarch64_link_hash_entry
*edir
, *eind
;
2502 edir
= (struct elf_aarch64_link_hash_entry
*) dir
;
2503 eind
= (struct elf_aarch64_link_hash_entry
*) ind
;
2505 if (eind
->dyn_relocs
!= NULL
)
2507 if (edir
->dyn_relocs
!= NULL
)
2509 struct elf_dyn_relocs
**pp
;
2510 struct elf_dyn_relocs
*p
;
2512 /* Add reloc counts against the indirect sym to the direct sym
2513 list. Merge any entries against the same section. */
2514 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
;)
2516 struct elf_dyn_relocs
*q
;
2518 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2519 if (q
->sec
== p
->sec
)
2521 q
->pc_count
+= p
->pc_count
;
2522 q
->count
+= p
->count
;
2529 *pp
= edir
->dyn_relocs
;
2532 edir
->dyn_relocs
= eind
->dyn_relocs
;
2533 eind
->dyn_relocs
= NULL
;
2536 if (ind
->root
.type
== bfd_link_hash_indirect
)
2538 /* Copy over PLT info. */
2539 if (dir
->got
.refcount
<= 0)
2541 edir
->got_type
= eind
->got_type
;
2542 eind
->got_type
= GOT_UNKNOWN
;
2546 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2549 /* Destroy an AArch64 elf linker hash table. */
2552 elfNN_aarch64_link_hash_table_free (bfd
*obfd
)
2554 struct elf_aarch64_link_hash_table
*ret
2555 = (struct elf_aarch64_link_hash_table
*) obfd
->link
.hash
;
2557 if (ret
->loc_hash_table
)
2558 htab_delete (ret
->loc_hash_table
);
2559 if (ret
->loc_hash_memory
)
2560 objalloc_free ((struct objalloc
*) ret
->loc_hash_memory
);
2562 bfd_hash_table_free (&ret
->stub_hash_table
);
2563 _bfd_elf_link_hash_table_free (obfd
);
2566 /* Create an AArch64 elf linker hash table. */
2568 static struct bfd_link_hash_table
*
2569 elfNN_aarch64_link_hash_table_create (bfd
*abfd
)
2571 struct elf_aarch64_link_hash_table
*ret
;
2572 bfd_size_type amt
= sizeof (struct elf_aarch64_link_hash_table
);
2574 ret
= bfd_zmalloc (amt
);
2578 if (!_bfd_elf_link_hash_table_init
2579 (&ret
->root
, abfd
, elfNN_aarch64_link_hash_newfunc
,
2580 sizeof (struct elf_aarch64_link_hash_entry
), AARCH64_ELF_DATA
))
2586 ret
->plt_header_size
= PLT_ENTRY_SIZE
;
2587 ret
->plt_entry_size
= PLT_SMALL_ENTRY_SIZE
;
2589 ret
->dt_tlsdesc_got
= (bfd_vma
) - 1;
2591 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2592 sizeof (struct elf_aarch64_stub_hash_entry
)))
2594 _bfd_elf_link_hash_table_free (abfd
);
2598 ret
->loc_hash_table
= htab_try_create (1024,
2599 elfNN_aarch64_local_htab_hash
,
2600 elfNN_aarch64_local_htab_eq
,
2602 ret
->loc_hash_memory
= objalloc_create ();
2603 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
2605 elfNN_aarch64_link_hash_table_free (abfd
);
2608 ret
->root
.root
.hash_table_free
= elfNN_aarch64_link_hash_table_free
;
2610 return &ret
->root
.root
;
2614 aarch64_relocate (unsigned int r_type
, bfd
*input_bfd
, asection
*input_section
,
2615 bfd_vma offset
, bfd_vma value
)
2617 reloc_howto_type
*howto
;
2620 howto
= elfNN_aarch64_howto_from_type (r_type
);
2621 place
= (input_section
->output_section
->vma
+ input_section
->output_offset
2624 r_type
= elfNN_aarch64_bfd_reloc_from_type (r_type
);
2625 value
= _bfd_aarch64_elf_resolve_relocation (r_type
, place
, value
, 0, FALSE
);
2626 return _bfd_aarch64_elf_put_addend (input_bfd
,
2627 input_section
->contents
+ offset
, r_type
,
2631 static enum elf_aarch64_stub_type
2632 aarch64_select_branch_stub (bfd_vma value
, bfd_vma place
)
2634 if (aarch64_valid_for_adrp_p (value
, place
))
2635 return aarch64_stub_adrp_branch
;
2636 return aarch64_stub_long_branch
;
2639 /* Determine the type of stub needed, if any, for a call. */
2641 static enum elf_aarch64_stub_type
2642 aarch64_type_of_stub (asection
*input_sec
,
2643 const Elf_Internal_Rela
*rel
,
2645 unsigned char st_type
,
2646 bfd_vma destination
)
2649 bfd_signed_vma branch_offset
;
2650 unsigned int r_type
;
2651 enum elf_aarch64_stub_type stub_type
= aarch64_stub_none
;
2653 if (st_type
!= STT_FUNC
2654 && (sym_sec
== input_sec
))
2657 /* Determine where the call point is. */
2658 location
= (input_sec
->output_offset
2659 + input_sec
->output_section
->vma
+ rel
->r_offset
);
2661 branch_offset
= (bfd_signed_vma
) (destination
- location
);
2663 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2665 /* We don't want to redirect any old unconditional jump in this way,
2666 only one which is being used for a sibcall, where it is
2667 acceptable for the IP0 and IP1 registers to be clobbered. */
2668 if ((r_type
== AARCH64_R (CALL26
) || r_type
== AARCH64_R (JUMP26
))
2669 && (branch_offset
> AARCH64_MAX_FWD_BRANCH_OFFSET
2670 || branch_offset
< AARCH64_MAX_BWD_BRANCH_OFFSET
))
2672 stub_type
= aarch64_stub_long_branch
;
2678 /* Build a name for an entry in the stub hash table. */
2681 elfNN_aarch64_stub_name (const asection
*input_section
,
2682 const asection
*sym_sec
,
2683 const struct elf_aarch64_link_hash_entry
*hash
,
2684 const Elf_Internal_Rela
*rel
)
2691 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 16 + 1;
2692 stub_name
= bfd_malloc (len
);
2693 if (stub_name
!= NULL
)
2694 snprintf (stub_name
, len
, "%08x_%s+%" BFD_VMA_FMT
"x",
2695 (unsigned int) input_section
->id
,
2696 hash
->root
.root
.root
.string
,
2701 len
= 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2702 stub_name
= bfd_malloc (len
);
2703 if (stub_name
!= NULL
)
2704 snprintf (stub_name
, len
, "%08x_%x:%x+%" BFD_VMA_FMT
"x",
2705 (unsigned int) input_section
->id
,
2706 (unsigned int) sym_sec
->id
,
2707 (unsigned int) ELFNN_R_SYM (rel
->r_info
),
2714 /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For
2715 executable PLT slots where the executable never takes the address of those
2716 functions, the function symbols are not added to the hash table. */
2719 elf_aarch64_hash_symbol (struct elf_link_hash_entry
*h
)
2721 if (h
->plt
.offset
!= (bfd_vma
) -1
2723 && !h
->pointer_equality_needed
)
2726 return _bfd_elf_hash_symbol (h
);
2730 /* Look up an entry in the stub hash. Stub entries are cached because
2731 creating the stub name takes a bit of time. */
2733 static struct elf_aarch64_stub_hash_entry
*
2734 elfNN_aarch64_get_stub_entry (const asection
*input_section
,
2735 const asection
*sym_sec
,
2736 struct elf_link_hash_entry
*hash
,
2737 const Elf_Internal_Rela
*rel
,
2738 struct elf_aarch64_link_hash_table
*htab
)
2740 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2741 struct elf_aarch64_link_hash_entry
*h
=
2742 (struct elf_aarch64_link_hash_entry
*) hash
;
2743 const asection
*id_sec
;
2745 if ((input_section
->flags
& SEC_CODE
) == 0)
2748 /* If this input section is part of a group of sections sharing one
2749 stub section, then use the id of the first section in the group.
2750 Stub names need to include a section id, as there may well be
2751 more than one stub used to reach say, printf, and we need to
2752 distinguish between them. */
2753 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
2755 if (h
!= NULL
&& h
->stub_cache
!= NULL
2756 && h
->stub_cache
->h
== h
&& h
->stub_cache
->id_sec
== id_sec
)
2758 stub_entry
= h
->stub_cache
;
2764 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, h
, rel
);
2765 if (stub_name
== NULL
)
2768 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
2769 stub_name
, FALSE
, FALSE
);
2771 h
->stub_cache
= stub_entry
;
2780 /* Create a stub section. */
2783 _bfd_aarch64_create_stub_section (asection
*section
,
2784 struct elf_aarch64_link_hash_table
*htab
)
2790 namelen
= strlen (section
->name
);
2791 len
= namelen
+ sizeof (STUB_SUFFIX
);
2792 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
2796 memcpy (s_name
, section
->name
, namelen
);
2797 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
2798 return (*htab
->add_stub_section
) (s_name
, section
);
2802 /* Find or create a stub section for a link section.
2804 Fix or create the stub section used to collect stubs attached to
2805 the specified link section. */
2808 _bfd_aarch64_get_stub_for_link_section (asection
*link_section
,
2809 struct elf_aarch64_link_hash_table
*htab
)
2811 if (htab
->stub_group
[link_section
->id
].stub_sec
== NULL
)
2812 htab
->stub_group
[link_section
->id
].stub_sec
2813 = _bfd_aarch64_create_stub_section (link_section
, htab
);
2814 return htab
->stub_group
[link_section
->id
].stub_sec
;
2818 /* Find or create a stub section in the stub group for an input
2822 _bfd_aarch64_create_or_find_stub_sec (asection
*section
,
2823 struct elf_aarch64_link_hash_table
*htab
)
2825 asection
*link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2826 return _bfd_aarch64_get_stub_for_link_section (link_sec
, htab
);
2830 /* Add a new stub entry in the stub group associated with an input
2831 section to the stub hash. Not all fields of the new stub entry are
2834 static struct elf_aarch64_stub_hash_entry
*
2835 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name
,
2837 struct elf_aarch64_link_hash_table
*htab
)
2841 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2843 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2844 stub_sec
= _bfd_aarch64_create_or_find_stub_sec (section
, htab
);
2846 /* Enter this entry into the linker stub hash table. */
2847 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2849 if (stub_entry
== NULL
)
2851 /* xgettext:c-format */
2852 _bfd_error_handler (_("%B: cannot create stub entry %s"),
2853 section
->owner
, stub_name
);
2857 stub_entry
->stub_sec
= stub_sec
;
2858 stub_entry
->stub_offset
= 0;
2859 stub_entry
->id_sec
= link_sec
;
2864 /* Add a new stub entry in the final stub section to the stub hash.
2865 Not all fields of the new stub entry are initialised. */
2867 static struct elf_aarch64_stub_hash_entry
*
2868 _bfd_aarch64_add_stub_entry_after (const char *stub_name
,
2869 asection
*link_section
,
2870 struct elf_aarch64_link_hash_table
*htab
)
2873 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2875 stub_sec
= _bfd_aarch64_get_stub_for_link_section (link_section
, htab
);
2876 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2878 if (stub_entry
== NULL
)
2880 _bfd_error_handler (_("cannot create stub entry %s"), stub_name
);
2884 stub_entry
->stub_sec
= stub_sec
;
2885 stub_entry
->stub_offset
= 0;
2886 stub_entry
->id_sec
= link_section
;
2893 aarch64_build_one_stub (struct bfd_hash_entry
*gen_entry
,
2894 void *in_arg ATTRIBUTE_UNUSED
)
2896 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2901 bfd_vma veneered_insn_loc
;
2902 bfd_vma veneer_entry_loc
;
2903 bfd_signed_vma branch_offset
= 0;
2904 unsigned int template_size
;
2905 const uint32_t *template;
2908 /* Massage our args to the form they really have. */
2909 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
2911 stub_sec
= stub_entry
->stub_sec
;
2913 /* Make a note of the offset within the stubs for this entry. */
2914 stub_entry
->stub_offset
= stub_sec
->size
;
2915 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
2917 stub_bfd
= stub_sec
->owner
;
2919 /* This is the address of the stub destination. */
2920 sym_value
= (stub_entry
->target_value
2921 + stub_entry
->target_section
->output_offset
2922 + stub_entry
->target_section
->output_section
->vma
);
2924 if (stub_entry
->stub_type
== aarch64_stub_long_branch
)
2926 bfd_vma place
= (stub_entry
->stub_offset
+ stub_sec
->output_section
->vma
2927 + stub_sec
->output_offset
);
2929 /* See if we can relax the stub. */
2930 if (aarch64_valid_for_adrp_p (sym_value
, place
))
2931 stub_entry
->stub_type
= aarch64_select_branch_stub (sym_value
, place
);
2934 switch (stub_entry
->stub_type
)
2936 case aarch64_stub_adrp_branch
:
2937 template = aarch64_adrp_branch_stub
;
2938 template_size
= sizeof (aarch64_adrp_branch_stub
);
2940 case aarch64_stub_long_branch
:
2941 template = aarch64_long_branch_stub
;
2942 template_size
= sizeof (aarch64_long_branch_stub
);
2944 case aarch64_stub_erratum_835769_veneer
:
2945 template = aarch64_erratum_835769_stub
;
2946 template_size
= sizeof (aarch64_erratum_835769_stub
);
2948 case aarch64_stub_erratum_843419_veneer
:
2949 template = aarch64_erratum_843419_stub
;
2950 template_size
= sizeof (aarch64_erratum_843419_stub
);
2956 for (i
= 0; i
< (template_size
/ sizeof template[0]); i
++)
2958 bfd_putl32 (template[i
], loc
);
2962 template_size
= (template_size
+ 7) & ~7;
2963 stub_sec
->size
+= template_size
;
2965 switch (stub_entry
->stub_type
)
2967 case aarch64_stub_adrp_branch
:
2968 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21
), stub_bfd
, stub_sec
,
2969 stub_entry
->stub_offset
, sym_value
))
2970 /* The stub would not have been relaxed if the offset was out
2974 if (aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC
), stub_bfd
, stub_sec
,
2975 stub_entry
->stub_offset
+ 4, sym_value
))
2979 case aarch64_stub_long_branch
:
2980 /* We want the value relative to the address 12 bytes back from the
2982 if (aarch64_relocate (AARCH64_R (PRELNN
), stub_bfd
, stub_sec
,
2983 stub_entry
->stub_offset
+ 16, sym_value
+ 12))
2987 case aarch64_stub_erratum_835769_veneer
:
2988 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
2989 + stub_entry
->target_section
->output_offset
2990 + stub_entry
->target_value
;
2991 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
2992 + stub_entry
->stub_sec
->output_offset
2993 + stub_entry
->stub_offset
;
2994 branch_offset
= veneered_insn_loc
- veneer_entry_loc
;
2995 branch_offset
>>= 2;
2996 branch_offset
&= 0x3ffffff;
2997 bfd_putl32 (stub_entry
->veneered_insn
,
2998 stub_sec
->contents
+ stub_entry
->stub_offset
);
2999 bfd_putl32 (template[1] | branch_offset
,
3000 stub_sec
->contents
+ stub_entry
->stub_offset
+ 4);
3003 case aarch64_stub_erratum_843419_veneer
:
3004 if (aarch64_relocate (AARCH64_R (JUMP26
), stub_bfd
, stub_sec
,
3005 stub_entry
->stub_offset
+ 4, sym_value
+ 4))
3016 /* As above, but don't actually build the stub. Just bump offset so
3017 we know stub section sizes. */
3020 aarch64_size_one_stub (struct bfd_hash_entry
*gen_entry
,
3021 void *in_arg ATTRIBUTE_UNUSED
)
3023 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3026 /* Massage our args to the form they really have. */
3027 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
3029 switch (stub_entry
->stub_type
)
3031 case aarch64_stub_adrp_branch
:
3032 size
= sizeof (aarch64_adrp_branch_stub
);
3034 case aarch64_stub_long_branch
:
3035 size
= sizeof (aarch64_long_branch_stub
);
3037 case aarch64_stub_erratum_835769_veneer
:
3038 size
= sizeof (aarch64_erratum_835769_stub
);
3040 case aarch64_stub_erratum_843419_veneer
:
3041 size
= sizeof (aarch64_erratum_843419_stub
);
3047 size
= (size
+ 7) & ~7;
3048 stub_entry
->stub_sec
->size
+= size
;
3052 /* External entry points for sizing and building linker stubs. */
3054 /* Set up various things so that we can make a list of input sections
3055 for each output section included in the link. Returns -1 on error,
3056 0 when no stubs will be needed, and 1 on success. */
3059 elfNN_aarch64_setup_section_lists (bfd
*output_bfd
,
3060 struct bfd_link_info
*info
)
3063 unsigned int bfd_count
;
3064 unsigned int top_id
, top_index
;
3066 asection
**input_list
, **list
;
3068 struct elf_aarch64_link_hash_table
*htab
=
3069 elf_aarch64_hash_table (info
);
3071 if (!is_elf_hash_table (htab
))
3074 /* Count the number of input BFDs and find the top input section id. */
3075 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3076 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3079 for (section
= input_bfd
->sections
;
3080 section
!= NULL
; section
= section
->next
)
3082 if (top_id
< section
->id
)
3083 top_id
= section
->id
;
3086 htab
->bfd_count
= bfd_count
;
3088 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3089 htab
->stub_group
= bfd_zmalloc (amt
);
3090 if (htab
->stub_group
== NULL
)
3093 /* We can't use output_bfd->section_count here to find the top output
3094 section index as some sections may have been removed, and
3095 _bfd_strip_section_from_output doesn't renumber the indices. */
3096 for (section
= output_bfd
->sections
, top_index
= 0;
3097 section
!= NULL
; section
= section
->next
)
3099 if (top_index
< section
->index
)
3100 top_index
= section
->index
;
3103 htab
->top_index
= top_index
;
3104 amt
= sizeof (asection
*) * (top_index
+ 1);
3105 input_list
= bfd_malloc (amt
);
3106 htab
->input_list
= input_list
;
3107 if (input_list
== NULL
)
3110 /* For sections we aren't interested in, mark their entries with a
3111 value we can check later. */
3112 list
= input_list
+ top_index
;
3114 *list
= bfd_abs_section_ptr
;
3115 while (list
-- != input_list
);
3117 for (section
= output_bfd
->sections
;
3118 section
!= NULL
; section
= section
->next
)
3120 if ((section
->flags
& SEC_CODE
) != 0)
3121 input_list
[section
->index
] = NULL
;
3127 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3128 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3130 /* The linker repeatedly calls this function for each input section,
3131 in the order that input sections are linked into output sections.
3132 Build lists of input sections to determine groupings between which
3133 we may insert linker stubs. */
3136 elfNN_aarch64_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3138 struct elf_aarch64_link_hash_table
*htab
=
3139 elf_aarch64_hash_table (info
);
3141 if (isec
->output_section
->index
<= htab
->top_index
)
3143 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3145 if (*list
!= bfd_abs_section_ptr
)
3147 /* Steal the link_sec pointer for our list. */
3148 /* This happens to make the list in reverse order,
3149 which is what we want. */
3150 PREV_SEC (isec
) = *list
;
3156 /* See whether we can group stub sections together. Grouping stub
3157 sections may result in fewer stubs. More importantly, we need to
3158 put all .init* and .fini* stubs at the beginning of the .init or
3159 .fini output sections respectively, because glibc splits the
3160 _init and _fini functions into multiple parts. Putting a stub in
3161 the middle of a function is not a good idea. */
3164 group_sections (struct elf_aarch64_link_hash_table
*htab
,
3165 bfd_size_type stub_group_size
,
3166 bfd_boolean stubs_always_before_branch
)
3168 asection
**list
= htab
->input_list
+ htab
->top_index
;
3172 asection
*tail
= *list
;
3174 if (tail
== bfd_abs_section_ptr
)
3177 while (tail
!= NULL
)
3181 bfd_size_type total
;
3185 while ((prev
= PREV_SEC (curr
)) != NULL
3186 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3190 /* OK, the size from the start of CURR to the end is less
3191 than stub_group_size and thus can be handled by one stub
3192 section. (Or the tail section is itself larger than
3193 stub_group_size, in which case we may be toast.)
3194 We should really be keeping track of the total size of
3195 stubs added here, as stubs contribute to the final output
3199 prev
= PREV_SEC (tail
);
3200 /* Set up this stub group. */
3201 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3203 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3205 /* But wait, there's more! Input sections up to stub_group_size
3206 bytes before the stub section can be handled by it too. */
3207 if (!stubs_always_before_branch
)
3211 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3215 prev
= PREV_SEC (tail
);
3216 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3222 while (list
-- != htab
->input_list
);
3224 free (htab
->input_list
);
3229 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3231 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
3232 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
3233 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
3234 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
3235 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
3236 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
3238 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
3239 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
3240 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
3241 #define AARCH64_ZR 0x1f
3243 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
3244 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
3246 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
3247 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
3248 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
3249 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
3250 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
3251 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
3252 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
3253 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
3254 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
3255 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
3256 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
3257 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
3258 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
3259 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
3260 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
3261 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
3262 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
3263 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
3265 /* Classify an INSN if it is indeed a load/store.
3267 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3269 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3272 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */
3275 aarch64_mem_op_p (uint32_t insn
, unsigned int *rt
, unsigned int *rt2
,
3276 bfd_boolean
*pair
, bfd_boolean
*load
)
3284 /* Bail out quickly if INSN doesn't fall into the the load-store
3286 if (!AARCH64_LDST (insn
))
3291 if (AARCH64_LDST_EX (insn
))
3293 *rt
= AARCH64_RT (insn
);
3295 if (AARCH64_BIT (insn
, 21) == 1)
3298 *rt2
= AARCH64_RT2 (insn
);
3300 *load
= AARCH64_LD (insn
);
3303 else if (AARCH64_LDST_NAP (insn
)
3304 || AARCH64_LDSTP_PI (insn
)
3305 || AARCH64_LDSTP_O (insn
)
3306 || AARCH64_LDSTP_PRE (insn
))
3309 *rt
= AARCH64_RT (insn
);
3310 *rt2
= AARCH64_RT2 (insn
);
3311 *load
= AARCH64_LD (insn
);
3314 else if (AARCH64_LDST_PCREL (insn
)
3315 || AARCH64_LDST_UI (insn
)
3316 || AARCH64_LDST_PIIMM (insn
)
3317 || AARCH64_LDST_U (insn
)
3318 || AARCH64_LDST_PREIMM (insn
)
3319 || AARCH64_LDST_RO (insn
)
3320 || AARCH64_LDST_UIMM (insn
))
3322 *rt
= AARCH64_RT (insn
);
3324 if (AARCH64_LDST_PCREL (insn
))
3326 opc
= AARCH64_BITS (insn
, 22, 2);
3327 v
= AARCH64_BIT (insn
, 26);
3328 opc_v
= opc
| (v
<< 2);
3329 *load
= (opc_v
== 1 || opc_v
== 2 || opc_v
== 3
3330 || opc_v
== 5 || opc_v
== 7);
3333 else if (AARCH64_LDST_SIMD_M (insn
)
3334 || AARCH64_LDST_SIMD_M_PI (insn
))
3336 *rt
= AARCH64_RT (insn
);
3337 *load
= AARCH64_BIT (insn
, 22);
3338 opcode
= (insn
>> 12) & 0xf;
3365 else if (AARCH64_LDST_SIMD_S (insn
)
3366 || AARCH64_LDST_SIMD_S_PI (insn
))
3368 *rt
= AARCH64_RT (insn
);
3369 r
= (insn
>> 21) & 1;
3370 *load
= AARCH64_BIT (insn
, 22);
3371 opcode
= (insn
>> 13) & 0x7;
3383 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3391 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3403 /* Return TRUE if INSN is multiply-accumulate. */
3406 aarch64_mlxl_p (uint32_t insn
)
3408 uint32_t op31
= AARCH64_OP31 (insn
);
3410 if (AARCH64_MAC (insn
)
3411 && (op31
== 0 || op31
== 1 || op31
== 5)
3412 /* Exclude MUL instructions which are encoded as a multiple accumulate
3414 && AARCH64_RA (insn
) != AARCH64_ZR
)
3420 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3421 it is possible for a 64-bit multiply-accumulate instruction to generate an
3422 incorrect result. The details are quite complex and hard to
3423 determine statically, since branches in the code may exist in some
3424 circumstances, but all cases end with a memory (load, store, or
3425 prefetch) instruction followed immediately by the multiply-accumulate
3426 operation. We employ a linker patching technique, by moving the potentially
3427 affected multiply-accumulate instruction into a patch region and replacing
3428 the original instruction with a branch to the patch. This function checks
3429 if INSN_1 is the memory operation followed by a multiply-accumulate
3430 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3431 if INSN_1 and INSN_2 are safe. */
3434 aarch64_erratum_sequence (uint32_t insn_1
, uint32_t insn_2
)
3444 if (aarch64_mlxl_p (insn_2
)
3445 && aarch64_mem_op_p (insn_1
, &rt
, &rt2
, &pair
, &load
))
3447 /* Any SIMD memory op is independent of the subsequent MLA
3448 by definition of the erratum. */
3449 if (AARCH64_BIT (insn_1
, 26))
3452 /* If not SIMD, check for integer memory ops and MLA relationship. */
3453 rn
= AARCH64_RN (insn_2
);
3454 ra
= AARCH64_RA (insn_2
);
3455 rm
= AARCH64_RM (insn_2
);
3457 /* If this is a load and there's a true(RAW) dependency, we are safe
3458 and this is not an erratum sequence. */
3460 (rt
== rn
|| rt
== rm
|| rt
== ra
3461 || (pair
&& (rt2
== rn
|| rt2
== rm
|| rt2
== ra
))))
3464 /* We conservatively put out stubs for all other cases (including
3472 /* Used to order a list of mapping symbols by address. */
3475 elf_aarch64_compare_mapping (const void *a
, const void *b
)
3477 const elf_aarch64_section_map
*amap
= (const elf_aarch64_section_map
*) a
;
3478 const elf_aarch64_section_map
*bmap
= (const elf_aarch64_section_map
*) b
;
3480 if (amap
->vma
> bmap
->vma
)
3482 else if (amap
->vma
< bmap
->vma
)
3484 else if (amap
->type
> bmap
->type
)
3485 /* Ensure results do not depend on the host qsort for objects with
3486 multiple mapping symbols at the same address by sorting on type
3489 else if (amap
->type
< bmap
->type
)
3497 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes
)
3499 char *stub_name
= (char *) bfd_malloc
3500 (strlen ("__erratum_835769_veneer_") + 16);
3501 sprintf (stub_name
,"__erratum_835769_veneer_%d", num_fixes
);
3505 /* Scan for Cortex-A53 erratum 835769 sequence.
3507 Return TRUE else FALSE on abnormal termination. */
3510 _bfd_aarch64_erratum_835769_scan (bfd
*input_bfd
,
3511 struct bfd_link_info
*info
,
3512 unsigned int *num_fixes_p
)
3515 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3516 unsigned int num_fixes
= *num_fixes_p
;
3521 for (section
= input_bfd
->sections
;
3523 section
= section
->next
)
3525 bfd_byte
*contents
= NULL
;
3526 struct _aarch64_elf_section_data
*sec_data
;
3529 if (elf_section_type (section
) != SHT_PROGBITS
3530 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3531 || (section
->flags
& SEC_EXCLUDE
) != 0
3532 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3533 || (section
->output_section
== bfd_abs_section_ptr
))
3536 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3537 contents
= elf_section_data (section
)->this_hdr
.contents
;
3538 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3541 sec_data
= elf_aarch64_section_data (section
);
3543 qsort (sec_data
->map
, sec_data
->mapcount
,
3544 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3546 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3548 unsigned int span_start
= sec_data
->map
[span
].vma
;
3549 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3550 ? sec_data
->map
[0].vma
+ section
->size
3551 : sec_data
->map
[span
+ 1].vma
);
3553 char span_type
= sec_data
->map
[span
].type
;
3555 if (span_type
== 'd')
3558 for (i
= span_start
; i
+ 4 < span_end
; i
+= 4)
3560 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3561 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3563 if (aarch64_erratum_sequence (insn_1
, insn_2
))
3565 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3566 char *stub_name
= _bfd_aarch64_erratum_835769_stub_name (num_fixes
);
3570 stub_entry
= _bfd_aarch64_add_stub_entry_in_group (stub_name
,
3576 stub_entry
->stub_type
= aarch64_stub_erratum_835769_veneer
;
3577 stub_entry
->target_section
= section
;
3578 stub_entry
->target_value
= i
+ 4;
3579 stub_entry
->veneered_insn
= insn_2
;
3580 stub_entry
->output_name
= stub_name
;
3585 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3589 *num_fixes_p
= num_fixes
;
3595 /* Test if instruction INSN is ADRP. */
3598 _bfd_aarch64_adrp_p (uint32_t insn
)
3600 return ((insn
& 0x9f000000) == 0x90000000);
3604 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3607 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1
, uint32_t insn_2
,
3615 return (aarch64_mem_op_p (insn_2
, &rt
, &rt2
, &pair
, &load
)
3618 && AARCH64_LDST_UIMM (insn_3
)
3619 && AARCH64_RN (insn_3
) == AARCH64_RD (insn_1
));
3623 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3625 Return TRUE if section CONTENTS at offset I contains one of the
3626 erratum 843419 sequences, otherwise return FALSE. If a sequence is
3627 seen set P_VENEER_I to the offset of the final LOAD/STORE
3628 instruction in the sequence.
3632 _bfd_aarch64_erratum_843419_p (bfd_byte
*contents
, bfd_vma vma
,
3633 bfd_vma i
, bfd_vma span_end
,
3634 bfd_vma
*p_veneer_i
)
3636 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3638 if (!_bfd_aarch64_adrp_p (insn_1
))
3641 if (span_end
< i
+ 12)
3644 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3645 uint32_t insn_3
= bfd_getl32 (contents
+ i
+ 8);
3647 if ((vma
& 0xfff) != 0xff8 && (vma
& 0xfff) != 0xffc)
3650 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_3
))
3652 *p_veneer_i
= i
+ 8;
3656 if (span_end
< i
+ 16)
3659 uint32_t insn_4
= bfd_getl32 (contents
+ i
+ 12);
3661 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_4
))
3663 *p_veneer_i
= i
+ 12;
3671 /* Resize all stub sections. */
3674 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table
*htab
)
3678 /* OK, we've added some stubs. Find out the new size of the
3680 for (section
= htab
->stub_bfd
->sections
;
3681 section
!= NULL
; section
= section
->next
)
3683 /* Ignore non-stub sections. */
3684 if (!strstr (section
->name
, STUB_SUFFIX
))
3689 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_size_one_stub
, htab
);
3691 for (section
= htab
->stub_bfd
->sections
;
3692 section
!= NULL
; section
= section
->next
)
3694 if (!strstr (section
->name
, STUB_SUFFIX
))
3700 /* Ensure all stub sections have a size which is a multiple of
3701 4096. This is important in order to ensure that the insertion
3702 of stub sections does not in itself move existing code around
3703 in such a way that new errata sequences are created. */
3704 if (htab
->fix_erratum_843419
)
3706 section
->size
= BFD_ALIGN (section
->size
, 0x1000);
3711 /* Construct an erratum 843419 workaround stub name.
3715 _bfd_aarch64_erratum_843419_stub_name (asection
*input_section
,
3718 const bfd_size_type len
= 8 + 4 + 1 + 8 + 1 + 16 + 1;
3719 char *stub_name
= bfd_malloc (len
);
3721 if (stub_name
!= NULL
)
3722 snprintf (stub_name
, len
, "e843419@%04x_%08x_%" BFD_VMA_FMT
"x",
3723 input_section
->owner
->id
,
3729 /* Build a stub_entry structure describing an 843419 fixup.
3731 The stub_entry constructed is populated with the bit pattern INSN
3732 of the instruction located at OFFSET within input SECTION.
3734 Returns TRUE on success. */
3737 _bfd_aarch64_erratum_843419_fixup (uint32_t insn
,
3738 bfd_vma adrp_offset
,
3739 bfd_vma ldst_offset
,
3741 struct bfd_link_info
*info
)
3743 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3745 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3747 stub_name
= _bfd_aarch64_erratum_843419_stub_name (section
, ldst_offset
);
3748 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3756 /* We always place an 843419 workaround veneer in the stub section
3757 attached to the input section in which an erratum sequence has
3758 been found. This ensures that later in the link process (in
3759 elfNN_aarch64_write_section) when we copy the veneered
3760 instruction from the input section into the stub section the
3761 copied instruction will have had any relocations applied to it.
3762 If we placed workaround veneers in any other stub section then we
3763 could not assume that all relocations have been processed on the
3764 corresponding input section at the point we output the stub
3768 stub_entry
= _bfd_aarch64_add_stub_entry_after (stub_name
, section
, htab
);
3769 if (stub_entry
== NULL
)
3775 stub_entry
->adrp_offset
= adrp_offset
;
3776 stub_entry
->target_value
= ldst_offset
;
3777 stub_entry
->target_section
= section
;
3778 stub_entry
->stub_type
= aarch64_stub_erratum_843419_veneer
;
3779 stub_entry
->veneered_insn
= insn
;
3780 stub_entry
->output_name
= stub_name
;
3786 /* Scan an input section looking for the signature of erratum 843419.
3788 Scans input SECTION in INPUT_BFD looking for erratum 843419
3789 signatures, for each signature found a stub_entry is created
3790 describing the location of the erratum for subsequent fixup.
3792 Return TRUE on successful scan, FALSE on failure to scan.
3796 _bfd_aarch64_erratum_843419_scan (bfd
*input_bfd
, asection
*section
,
3797 struct bfd_link_info
*info
)
3799 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3804 if (elf_section_type (section
) != SHT_PROGBITS
3805 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3806 || (section
->flags
& SEC_EXCLUDE
) != 0
3807 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3808 || (section
->output_section
== bfd_abs_section_ptr
))
3813 bfd_byte
*contents
= NULL
;
3814 struct _aarch64_elf_section_data
*sec_data
;
3817 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3818 contents
= elf_section_data (section
)->this_hdr
.contents
;
3819 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3822 sec_data
= elf_aarch64_section_data (section
);
3824 qsort (sec_data
->map
, sec_data
->mapcount
,
3825 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3827 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3829 unsigned int span_start
= sec_data
->map
[span
].vma
;
3830 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3831 ? sec_data
->map
[0].vma
+ section
->size
3832 : sec_data
->map
[span
+ 1].vma
);
3834 char span_type
= sec_data
->map
[span
].type
;
3836 if (span_type
== 'd')
3839 for (i
= span_start
; i
+ 8 < span_end
; i
+= 4)
3841 bfd_vma vma
= (section
->output_section
->vma
3842 + section
->output_offset
3846 if (_bfd_aarch64_erratum_843419_p
3847 (contents
, vma
, i
, span_end
, &veneer_i
))
3849 uint32_t insn
= bfd_getl32 (contents
+ veneer_i
);
3851 if (!_bfd_aarch64_erratum_843419_fixup (insn
, i
, veneer_i
,
3858 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3867 /* Determine and set the size of the stub section for a final link.
3869 The basic idea here is to examine all the relocations looking for
3870 PC-relative calls to a target that is unreachable with a "bl"
3874 elfNN_aarch64_size_stubs (bfd
*output_bfd
,
3876 struct bfd_link_info
*info
,
3877 bfd_signed_vma group_size
,
3878 asection
* (*add_stub_section
) (const char *,
3880 void (*layout_sections_again
) (void))
3882 bfd_size_type stub_group_size
;
3883 bfd_boolean stubs_always_before_branch
;
3884 bfd_boolean stub_changed
= FALSE
;
3885 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3886 unsigned int num_erratum_835769_fixes
= 0;
3888 /* Propagate mach to stub bfd, because it may not have been
3889 finalized when we created stub_bfd. */
3890 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
3891 bfd_get_mach (output_bfd
));
3893 /* Stash our params away. */
3894 htab
->stub_bfd
= stub_bfd
;
3895 htab
->add_stub_section
= add_stub_section
;
3896 htab
->layout_sections_again
= layout_sections_again
;
3897 stubs_always_before_branch
= group_size
< 0;
3899 stub_group_size
= -group_size
;
3901 stub_group_size
= group_size
;
3903 if (stub_group_size
== 1)
3905 /* Default values. */
3906 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3907 stub_group_size
= 127 * 1024 * 1024;
3910 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3912 (*htab
->layout_sections_again
) ();
3914 if (htab
->fix_erratum_835769
)
3918 for (input_bfd
= info
->input_bfds
;
3919 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3920 if (!_bfd_aarch64_erratum_835769_scan (input_bfd
, info
,
3921 &num_erratum_835769_fixes
))
3924 _bfd_aarch64_resize_stubs (htab
);
3925 (*htab
->layout_sections_again
) ();
3928 if (htab
->fix_erratum_843419
)
3932 for (input_bfd
= info
->input_bfds
;
3934 input_bfd
= input_bfd
->link
.next
)
3938 for (section
= input_bfd
->sections
;
3940 section
= section
->next
)
3941 if (!_bfd_aarch64_erratum_843419_scan (input_bfd
, section
, info
))
3945 _bfd_aarch64_resize_stubs (htab
);
3946 (*htab
->layout_sections_again
) ();
3953 for (input_bfd
= info
->input_bfds
;
3954 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3956 Elf_Internal_Shdr
*symtab_hdr
;
3958 Elf_Internal_Sym
*local_syms
= NULL
;
3960 /* We'll need the symbol table in a second. */
3961 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3962 if (symtab_hdr
->sh_info
== 0)
3965 /* Walk over each section attached to the input bfd. */
3966 for (section
= input_bfd
->sections
;
3967 section
!= NULL
; section
= section
->next
)
3969 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
3971 /* If there aren't any relocs, then there's nothing more
3973 if ((section
->flags
& SEC_RELOC
) == 0
3974 || section
->reloc_count
== 0
3975 || (section
->flags
& SEC_CODE
) == 0)
3978 /* If this section is a link-once section that will be
3979 discarded, then don't create any stubs. */
3980 if (section
->output_section
== NULL
3981 || section
->output_section
->owner
!= output_bfd
)
3984 /* Get the relocs. */
3986 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
3987 NULL
, info
->keep_memory
);
3988 if (internal_relocs
== NULL
)
3989 goto error_ret_free_local
;
3991 /* Now examine each relocation. */
3992 irela
= internal_relocs
;
3993 irelaend
= irela
+ section
->reloc_count
;
3994 for (; irela
< irelaend
; irela
++)
3996 unsigned int r_type
, r_indx
;
3997 enum elf_aarch64_stub_type stub_type
;
3998 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4001 bfd_vma destination
;
4002 struct elf_aarch64_link_hash_entry
*hash
;
4003 const char *sym_name
;
4005 const asection
*id_sec
;
4006 unsigned char st_type
;
4009 r_type
= ELFNN_R_TYPE (irela
->r_info
);
4010 r_indx
= ELFNN_R_SYM (irela
->r_info
);
4012 if (r_type
>= (unsigned int) R_AARCH64_end
)
4014 bfd_set_error (bfd_error_bad_value
);
4015 error_ret_free_internal
:
4016 if (elf_section_data (section
)->relocs
== NULL
)
4017 free (internal_relocs
);
4018 goto error_ret_free_local
;
4021 /* Only look for stubs on unconditional branch and
4022 branch and link instructions. */
4023 if (r_type
!= (unsigned int) AARCH64_R (CALL26
)
4024 && r_type
!= (unsigned int) AARCH64_R (JUMP26
))
4027 /* Now determine the call target, its name, value,
4034 if (r_indx
< symtab_hdr
->sh_info
)
4036 /* It's a local symbol. */
4037 Elf_Internal_Sym
*sym
;
4038 Elf_Internal_Shdr
*hdr
;
4040 if (local_syms
== NULL
)
4043 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4044 if (local_syms
== NULL
)
4046 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4047 symtab_hdr
->sh_info
, 0,
4049 if (local_syms
== NULL
)
4050 goto error_ret_free_internal
;
4053 sym
= local_syms
+ r_indx
;
4054 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4055 sym_sec
= hdr
->bfd_section
;
4057 /* This is an undefined symbol. It can never
4061 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4062 sym_value
= sym
->st_value
;
4063 destination
= (sym_value
+ irela
->r_addend
4064 + sym_sec
->output_offset
4065 + sym_sec
->output_section
->vma
);
4066 st_type
= ELF_ST_TYPE (sym
->st_info
);
4068 = bfd_elf_string_from_elf_section (input_bfd
,
4069 symtab_hdr
->sh_link
,
4076 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4077 hash
= ((struct elf_aarch64_link_hash_entry
*)
4078 elf_sym_hashes (input_bfd
)[e_indx
]);
4080 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4081 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4082 hash
= ((struct elf_aarch64_link_hash_entry
*)
4083 hash
->root
.root
.u
.i
.link
);
4085 if (hash
->root
.root
.type
== bfd_link_hash_defined
4086 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4088 struct elf_aarch64_link_hash_table
*globals
=
4089 elf_aarch64_hash_table (info
);
4090 sym_sec
= hash
->root
.root
.u
.def
.section
;
4091 sym_value
= hash
->root
.root
.u
.def
.value
;
4092 /* For a destination in a shared library,
4093 use the PLT stub as target address to
4094 decide whether a branch stub is
4096 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4097 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4099 sym_sec
= globals
->root
.splt
;
4100 sym_value
= hash
->root
.plt
.offset
;
4101 if (sym_sec
->output_section
!= NULL
)
4102 destination
= (sym_value
4103 + sym_sec
->output_offset
4105 sym_sec
->output_section
->vma
);
4107 else if (sym_sec
->output_section
!= NULL
)
4108 destination
= (sym_value
+ irela
->r_addend
4109 + sym_sec
->output_offset
4110 + sym_sec
->output_section
->vma
);
4112 else if (hash
->root
.root
.type
== bfd_link_hash_undefined
4113 || (hash
->root
.root
.type
4114 == bfd_link_hash_undefweak
))
4116 /* For a shared library, use the PLT stub as
4117 target address to decide whether a long
4118 branch stub is needed.
4119 For absolute code, they cannot be handled. */
4120 struct elf_aarch64_link_hash_table
*globals
=
4121 elf_aarch64_hash_table (info
);
4123 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4124 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4126 sym_sec
= globals
->root
.splt
;
4127 sym_value
= hash
->root
.plt
.offset
;
4128 if (sym_sec
->output_section
!= NULL
)
4129 destination
= (sym_value
4130 + sym_sec
->output_offset
4132 sym_sec
->output_section
->vma
);
4139 bfd_set_error (bfd_error_bad_value
);
4140 goto error_ret_free_internal
;
4142 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4143 sym_name
= hash
->root
.root
.root
.string
;
4146 /* Determine what (if any) linker stub is needed. */
4147 stub_type
= aarch64_type_of_stub (section
, irela
, sym_sec
,
4148 st_type
, destination
);
4149 if (stub_type
== aarch64_stub_none
)
4152 /* Support for grouping stub sections. */
4153 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4155 /* Get the name of this stub. */
4156 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, hash
,
4159 goto error_ret_free_internal
;
4162 aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
4163 stub_name
, FALSE
, FALSE
);
4164 if (stub_entry
!= NULL
)
4166 /* The proper stub has already been created. */
4171 stub_entry
= _bfd_aarch64_add_stub_entry_in_group
4172 (stub_name
, section
, htab
);
4173 if (stub_entry
== NULL
)
4176 goto error_ret_free_internal
;
4179 stub_entry
->target_value
= sym_value
+ irela
->r_addend
;
4180 stub_entry
->target_section
= sym_sec
;
4181 stub_entry
->stub_type
= stub_type
;
4182 stub_entry
->h
= hash
;
4183 stub_entry
->st_type
= st_type
;
4185 if (sym_name
== NULL
)
4186 sym_name
= "unnamed";
4187 len
= sizeof (STUB_ENTRY_NAME
) + strlen (sym_name
);
4188 stub_entry
->output_name
= bfd_alloc (htab
->stub_bfd
, len
);
4189 if (stub_entry
->output_name
== NULL
)
4192 goto error_ret_free_internal
;
4195 snprintf (stub_entry
->output_name
, len
, STUB_ENTRY_NAME
,
4198 stub_changed
= TRUE
;
4201 /* We're done with the internal relocs, free them. */
4202 if (elf_section_data (section
)->relocs
== NULL
)
4203 free (internal_relocs
);
4210 _bfd_aarch64_resize_stubs (htab
);
4212 /* Ask the linker to do its stuff. */
4213 (*htab
->layout_sections_again
) ();
4214 stub_changed
= FALSE
;
4219 error_ret_free_local
:
4223 /* Build all the stubs associated with the current output file. The
4224 stubs are kept in a hash table attached to the main linker hash
4225 table. We also set up the .plt entries for statically linked PIC
4226 functions here. This function is called via aarch64_elf_finish in the
4230 elfNN_aarch64_build_stubs (struct bfd_link_info
*info
)
4233 struct bfd_hash_table
*table
;
4234 struct elf_aarch64_link_hash_table
*htab
;
4236 htab
= elf_aarch64_hash_table (info
);
4238 for (stub_sec
= htab
->stub_bfd
->sections
;
4239 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
4243 /* Ignore non-stub sections. */
4244 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4247 /* Allocate memory to hold the linker stubs. */
4248 size
= stub_sec
->size
;
4249 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4250 if (stub_sec
->contents
== NULL
&& size
!= 0)
4254 bfd_putl32 (0x14000000 | (size
>> 2), stub_sec
->contents
);
4255 stub_sec
->size
+= 4;
4258 /* Build the stubs as directed by the stub hash table. */
4259 table
= &htab
->stub_hash_table
;
4260 bfd_hash_traverse (table
, aarch64_build_one_stub
, info
);
4266 /* Add an entry to the code/data map for section SEC. */
4269 elfNN_aarch64_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
4271 struct _aarch64_elf_section_data
*sec_data
=
4272 elf_aarch64_section_data (sec
);
4273 unsigned int newidx
;
4275 if (sec_data
->map
== NULL
)
4277 sec_data
->map
= bfd_malloc (sizeof (elf_aarch64_section_map
));
4278 sec_data
->mapcount
= 0;
4279 sec_data
->mapsize
= 1;
4282 newidx
= sec_data
->mapcount
++;
4284 if (sec_data
->mapcount
> sec_data
->mapsize
)
4286 sec_data
->mapsize
*= 2;
4287 sec_data
->map
= bfd_realloc_or_free
4288 (sec_data
->map
, sec_data
->mapsize
* sizeof (elf_aarch64_section_map
));
4293 sec_data
->map
[newidx
].vma
= vma
;
4294 sec_data
->map
[newidx
].type
= type
;
4299 /* Initialise maps of insn/data for input BFDs. */
4301 bfd_elfNN_aarch64_init_maps (bfd
*abfd
)
4303 Elf_Internal_Sym
*isymbuf
;
4304 Elf_Internal_Shdr
*hdr
;
4305 unsigned int i
, localsyms
;
4307 /* Make sure that we are dealing with an AArch64 elf binary. */
4308 if (!is_aarch64_elf (abfd
))
4311 if ((abfd
->flags
& DYNAMIC
) != 0)
4314 hdr
= &elf_symtab_hdr (abfd
);
4315 localsyms
= hdr
->sh_info
;
4317 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4318 should contain the number of local symbols, which should come before any
4319 global symbols. Mapping symbols are always local. */
4320 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
, NULL
);
4322 /* No internal symbols read? Skip this BFD. */
4323 if (isymbuf
== NULL
)
4326 for (i
= 0; i
< localsyms
; i
++)
4328 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
4329 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4332 if (sec
!= NULL
&& ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
4334 name
= bfd_elf_string_from_elf_section (abfd
,
4338 if (bfd_is_aarch64_special_symbol_name
4339 (name
, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP
))
4340 elfNN_aarch64_section_map_add (sec
, name
[1], isym
->st_value
);
4345 /* Set option values needed during linking. */
4347 bfd_elfNN_aarch64_set_options (struct bfd
*output_bfd
,
4348 struct bfd_link_info
*link_info
,
4350 int no_wchar_warn
, int pic_veneer
,
4351 int fix_erratum_835769
,
4352 int fix_erratum_843419
,
4353 int no_apply_dynamic_relocs
)
4355 struct elf_aarch64_link_hash_table
*globals
;
4357 globals
= elf_aarch64_hash_table (link_info
);
4358 globals
->pic_veneer
= pic_veneer
;
4359 globals
->fix_erratum_835769
= fix_erratum_835769
;
4360 globals
->fix_erratum_843419
= fix_erratum_843419
;
4361 globals
->fix_erratum_843419_adr
= TRUE
;
4362 globals
->no_apply_dynamic_relocs
= no_apply_dynamic_relocs
;
4364 BFD_ASSERT (is_aarch64_elf (output_bfd
));
4365 elf_aarch64_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
4366 elf_aarch64_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
4370 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry
*h
,
4371 struct elf_aarch64_link_hash_table
4372 *globals
, struct bfd_link_info
*info
,
4373 bfd_vma value
, bfd
*output_bfd
,
4374 bfd_boolean
*unresolved_reloc_p
)
4376 bfd_vma off
= (bfd_vma
) - 1;
4377 asection
*basegot
= globals
->root
.sgot
;
4378 bfd_boolean dyn
= globals
->root
.dynamic_sections_created
;
4382 BFD_ASSERT (basegot
!= NULL
);
4383 off
= h
->got
.offset
;
4384 BFD_ASSERT (off
!= (bfd_vma
) - 1);
4385 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
4386 || (bfd_link_pic (info
)
4387 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4388 || (ELF_ST_VISIBILITY (h
->other
)
4389 && h
->root
.type
== bfd_link_hash_undefweak
))
4391 /* This is actually a static link, or it is a -Bsymbolic link
4392 and the symbol is defined locally. We must initialize this
4393 entry in the global offset table. Since the offset must
4394 always be a multiple of 8 (4 in the case of ILP32), we use
4395 the least significant bit to record whether we have
4396 initialized it already.
4397 When doing a dynamic link, we create a .rel(a).got relocation
4398 entry to initialize the value. This is done in the
4399 finish_dynamic_symbol routine. */
4404 bfd_put_NN (output_bfd
, value
, basegot
->contents
+ off
);
4409 *unresolved_reloc_p
= FALSE
;
4411 off
= off
+ basegot
->output_section
->vma
+ basegot
->output_offset
;
4417 /* Change R_TYPE to a more efficient access model where possible,
4418 return the new reloc type. */
4420 static bfd_reloc_code_real_type
4421 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type
,
4422 struct elf_link_hash_entry
*h
)
4424 bfd_boolean is_local
= h
== NULL
;
4428 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4429 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4431 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4432 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
);
4434 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4436 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4439 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4441 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4442 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4444 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
4446 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4447 : BFD_RELOC_AARCH64_NONE
);
4449 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
4451 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4452 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
);
4454 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
4456 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4457 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
);
4459 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
4460 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4462 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4463 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
);
4465 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4466 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
: r_type
;
4468 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
4469 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
: r_type
;
4471 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4474 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4476 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4477 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4479 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
4480 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
4481 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4482 /* Instructions with these relocations will become NOPs. */
4483 return BFD_RELOC_AARCH64_NONE
;
4485 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4486 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4487 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4488 return is_local
? BFD_RELOC_AARCH64_NONE
: r_type
;
4491 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4493 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4494 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
;
4496 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4498 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4499 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
;
4510 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type
)
4514 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
4515 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
4516 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
4517 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
4518 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
4519 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
4520 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
4521 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
4522 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
4525 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4526 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4527 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4528 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4529 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4530 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4531 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4532 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4535 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
4536 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
4537 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4538 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4539 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4540 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
4541 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
4542 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4543 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
4544 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
4545 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
4546 return GOT_TLSDESC_GD
;
4548 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4549 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
4550 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
4551 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4552 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
4553 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
4563 aarch64_can_relax_tls (bfd
*input_bfd
,
4564 struct bfd_link_info
*info
,
4565 bfd_reloc_code_real_type r_type
,
4566 struct elf_link_hash_entry
*h
,
4567 unsigned long r_symndx
)
4569 unsigned int symbol_got_type
;
4570 unsigned int reloc_got_type
;
4572 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type
))
4575 symbol_got_type
= elfNN_aarch64_symbol_got_type (h
, input_bfd
, r_symndx
);
4576 reloc_got_type
= aarch64_reloc_got_type (r_type
);
4578 if (symbol_got_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (reloc_got_type
))
4581 if (bfd_link_pic (info
))
4584 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
)
4590 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4593 static bfd_reloc_code_real_type
4594 aarch64_tls_transition (bfd
*input_bfd
,
4595 struct bfd_link_info
*info
,
4596 unsigned int r_type
,
4597 struct elf_link_hash_entry
*h
,
4598 unsigned long r_symndx
)
4600 bfd_reloc_code_real_type bfd_r_type
4601 = elfNN_aarch64_bfd_reloc_from_type (r_type
);
4603 if (! aarch64_can_relax_tls (input_bfd
, info
, bfd_r_type
, h
, r_symndx
))
4606 return aarch64_tls_transition_without_check (bfd_r_type
, h
);
4609 /* Return the base VMA address which should be subtracted from real addresses
4610 when resolving R_AARCH64_TLS_DTPREL relocation. */
4613 dtpoff_base (struct bfd_link_info
*info
)
4615 /* If tls_sec is NULL, we should have signalled an error already. */
4616 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4617 return elf_hash_table (info
)->tls_sec
->vma
;
4620 /* Return the base VMA address which should be subtracted from real addresses
4621 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4624 tpoff_base (struct bfd_link_info
*info
)
4626 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
4628 /* If tls_sec is NULL, we should have signalled an error already. */
4629 BFD_ASSERT (htab
->tls_sec
!= NULL
);
4631 bfd_vma base
= align_power ((bfd_vma
) TCB_SIZE
,
4632 htab
->tls_sec
->alignment_power
);
4633 return htab
->tls_sec
->vma
- base
;
4637 symbol_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4638 unsigned long r_symndx
)
4640 /* Calculate the address of the GOT entry for symbol
4641 referred to in h. */
4643 return &h
->got
.offset
;
4647 struct elf_aarch64_local_symbol
*l
;
4649 l
= elf_aarch64_locals (input_bfd
);
4650 return &l
[r_symndx
].got_offset
;
4655 symbol_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4656 unsigned long r_symndx
)
4659 p
= symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4664 symbol_got_offset_mark_p (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4665 unsigned long r_symndx
)
4668 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4673 symbol_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4674 unsigned long r_symndx
)
4677 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4683 symbol_tlsdesc_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4684 unsigned long r_symndx
)
4686 /* Calculate the address of the GOT entry for symbol
4687 referred to in h. */
4690 struct elf_aarch64_link_hash_entry
*eh
;
4691 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
4692 return &eh
->tlsdesc_got_jump_table_offset
;
4697 struct elf_aarch64_local_symbol
*l
;
4699 l
= elf_aarch64_locals (input_bfd
);
4700 return &l
[r_symndx
].tlsdesc_got_jump_table_offset
;
4705 symbol_tlsdesc_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4706 unsigned long r_symndx
)
4709 p
= symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4714 symbol_tlsdesc_got_offset_mark_p (bfd
*input_bfd
,
4715 struct elf_link_hash_entry
*h
,
4716 unsigned long r_symndx
)
4719 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4724 symbol_tlsdesc_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4725 unsigned long r_symndx
)
4728 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4733 /* Data for make_branch_to_erratum_835769_stub(). */
4735 struct erratum_835769_branch_to_stub_data
4737 struct bfd_link_info
*info
;
4738 asection
*output_section
;
4742 /* Helper to insert branches to erratum 835769 stubs in the right
4743 places for a particular section. */
4746 make_branch_to_erratum_835769_stub (struct bfd_hash_entry
*gen_entry
,
4749 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4750 struct erratum_835769_branch_to_stub_data
*data
;
4752 unsigned long branch_insn
= 0;
4753 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
4754 bfd_signed_vma branch_offset
;
4755 unsigned int target
;
4758 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4759 data
= (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4761 if (stub_entry
->target_section
!= data
->output_section
4762 || stub_entry
->stub_type
!= aarch64_stub_erratum_835769_veneer
)
4765 contents
= data
->contents
;
4766 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4767 + stub_entry
->target_section
->output_offset
4768 + stub_entry
->target_value
;
4769 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4770 + stub_entry
->stub_sec
->output_offset
4771 + stub_entry
->stub_offset
;
4772 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4774 abfd
= stub_entry
->target_section
->owner
;
4775 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4777 (_("%B: error: Erratum 835769 stub out "
4778 "of range (input file too large)"), abfd
);
4780 target
= stub_entry
->target_value
;
4781 branch_insn
= 0x14000000;
4782 branch_offset
>>= 2;
4783 branch_offset
&= 0x3ffffff;
4784 branch_insn
|= branch_offset
;
4785 bfd_putl32 (branch_insn
, &contents
[target
]);
4792 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry
*gen_entry
,
4795 struct elf_aarch64_stub_hash_entry
*stub_entry
4796 = (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4797 struct erratum_835769_branch_to_stub_data
*data
4798 = (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4799 struct bfd_link_info
*info
;
4800 struct elf_aarch64_link_hash_table
*htab
;
4808 contents
= data
->contents
;
4809 section
= data
->output_section
;
4811 htab
= elf_aarch64_hash_table (info
);
4813 if (stub_entry
->target_section
!= section
4814 || stub_entry
->stub_type
!= aarch64_stub_erratum_843419_veneer
)
4817 insn
= bfd_getl32 (contents
+ stub_entry
->target_value
);
4819 stub_entry
->stub_sec
->contents
+ stub_entry
->stub_offset
);
4821 place
= (section
->output_section
->vma
+ section
->output_offset
4822 + stub_entry
->adrp_offset
);
4823 insn
= bfd_getl32 (contents
+ stub_entry
->adrp_offset
);
4825 if ((insn
& AARCH64_ADRP_OP_MASK
) != AARCH64_ADRP_OP
)
4828 bfd_signed_vma imm
=
4829 (_bfd_aarch64_sign_extend
4830 ((bfd_vma
) _bfd_aarch64_decode_adrp_imm (insn
) << 12, 33)
4833 if (htab
->fix_erratum_843419_adr
4834 && (imm
>= AARCH64_MIN_ADRP_IMM
&& imm
<= AARCH64_MAX_ADRP_IMM
))
4836 insn
= (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP
, imm
)
4837 | AARCH64_RT (insn
));
4838 bfd_putl32 (insn
, contents
+ stub_entry
->adrp_offset
);
4842 bfd_vma veneered_insn_loc
;
4843 bfd_vma veneer_entry_loc
;
4844 bfd_signed_vma branch_offset
;
4845 uint32_t branch_insn
;
4847 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4848 + stub_entry
->target_section
->output_offset
4849 + stub_entry
->target_value
;
4850 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4851 + stub_entry
->stub_sec
->output_offset
4852 + stub_entry
->stub_offset
;
4853 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4855 abfd
= stub_entry
->target_section
->owner
;
4856 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4858 (_("%B: error: Erratum 843419 stub out "
4859 "of range (input file too large)"), abfd
);
4861 branch_insn
= 0x14000000;
4862 branch_offset
>>= 2;
4863 branch_offset
&= 0x3ffffff;
4864 branch_insn
|= branch_offset
;
4865 bfd_putl32 (branch_insn
, contents
+ stub_entry
->target_value
);
4872 elfNN_aarch64_write_section (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4873 struct bfd_link_info
*link_info
,
4878 struct elf_aarch64_link_hash_table
*globals
=
4879 elf_aarch64_hash_table (link_info
);
4881 if (globals
== NULL
)
4884 /* Fix code to point to erratum 835769 stubs. */
4885 if (globals
->fix_erratum_835769
)
4887 struct erratum_835769_branch_to_stub_data data
;
4889 data
.info
= link_info
;
4890 data
.output_section
= sec
;
4891 data
.contents
= contents
;
4892 bfd_hash_traverse (&globals
->stub_hash_table
,
4893 make_branch_to_erratum_835769_stub
, &data
);
4896 if (globals
->fix_erratum_843419
)
4898 struct erratum_835769_branch_to_stub_data data
;
4900 data
.info
= link_info
;
4901 data
.output_section
= sec
;
4902 data
.contents
= contents
;
4903 bfd_hash_traverse (&globals
->stub_hash_table
,
4904 _bfd_aarch64_erratum_843419_branch_to_stub
, &data
);
4910 /* Perform a relocation as part of a final link. The input relocation type
4911 should be TLS relaxed. */
4913 static bfd_reloc_status_type
4914 elfNN_aarch64_final_link_relocate (reloc_howto_type
*howto
,
4917 asection
*input_section
,
4919 Elf_Internal_Rela
*rel
,
4921 struct bfd_link_info
*info
,
4923 struct elf_link_hash_entry
*h
,
4924 bfd_boolean
*unresolved_reloc_p
,
4925 bfd_boolean save_addend
,
4926 bfd_vma
*saved_addend
,
4927 Elf_Internal_Sym
*sym
)
4929 Elf_Internal_Shdr
*symtab_hdr
;
4930 unsigned int r_type
= howto
->type
;
4931 bfd_reloc_code_real_type bfd_r_type
4932 = elfNN_aarch64_bfd_reloc_from_howto (howto
);
4933 unsigned long r_symndx
;
4934 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
4936 bfd_signed_vma signed_addend
;
4937 struct elf_aarch64_link_hash_table
*globals
;
4938 bfd_boolean weak_undef_p
;
4941 globals
= elf_aarch64_hash_table (info
);
4943 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4945 BFD_ASSERT (is_aarch64_elf (input_bfd
));
4947 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
4949 place
= input_section
->output_section
->vma
4950 + input_section
->output_offset
+ rel
->r_offset
;
4952 /* Get addend, accumulating the addend for consecutive relocs
4953 which refer to the same offset. */
4954 signed_addend
= saved_addend
? *saved_addend
: 0;
4955 signed_addend
+= rel
->r_addend
;
4957 weak_undef_p
= (h
? h
->root
.type
== bfd_link_hash_undefweak
4958 : bfd_is_und_section (sym_sec
));
4960 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4961 it here if it is defined in a non-shared object. */
4963 && h
->type
== STT_GNU_IFUNC
4970 if ((input_section
->flags
& SEC_ALLOC
) == 0
4971 || h
->plt
.offset
== (bfd_vma
) -1)
4974 /* STT_GNU_IFUNC symbol must go through PLT. */
4975 plt
= globals
->root
.splt
? globals
->root
.splt
: globals
->root
.iplt
;
4976 value
= (plt
->output_section
->vma
+ plt
->output_offset
+ h
->plt
.offset
);
4981 if (h
->root
.root
.string
)
4982 name
= h
->root
.root
.string
;
4984 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4987 /* xgettext:c-format */
4988 (_("%B: relocation %s against STT_GNU_IFUNC "
4989 "symbol `%s' isn't handled by %s"), input_bfd
,
4990 howto
->name
, name
, __FUNCTION__
);
4991 bfd_set_error (bfd_error_bad_value
);
4994 case BFD_RELOC_AARCH64_NN
:
4995 if (rel
->r_addend
!= 0)
4997 if (h
->root
.root
.string
)
4998 name
= h
->root
.root
.string
;
5000 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
5003 /* xgettext:c-format */
5004 (_("%B: relocation %s against STT_GNU_IFUNC "
5005 "symbol `%s' has non-zero addend: %d"),
5006 input_bfd
, howto
->name
, name
, rel
->r_addend
);
5007 bfd_set_error (bfd_error_bad_value
);
5011 /* Generate dynamic relocation only when there is a
5012 non-GOT reference in a shared object. */
5013 if (bfd_link_pic (info
) && h
->non_got_ref
)
5015 Elf_Internal_Rela outrel
;
5018 /* Need a dynamic relocation to get the real function
5020 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
5024 if (outrel
.r_offset
== (bfd_vma
) -1
5025 || outrel
.r_offset
== (bfd_vma
) -2)
5028 outrel
.r_offset
+= (input_section
->output_section
->vma
5029 + input_section
->output_offset
);
5031 if (h
->dynindx
== -1
5033 || bfd_link_executable (info
))
5035 /* This symbol is resolved locally. */
5036 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
5037 outrel
.r_addend
= (h
->root
.u
.def
.value
5038 + h
->root
.u
.def
.section
->output_section
->vma
5039 + h
->root
.u
.def
.section
->output_offset
);
5043 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5044 outrel
.r_addend
= 0;
5047 sreloc
= globals
->root
.irelifunc
;
5048 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5050 /* If this reloc is against an external symbol, we
5051 do not want to fiddle with the addend. Otherwise,
5052 we need to include the symbol value so that it
5053 becomes an addend for the dynamic reloc. For an
5054 internal symbol, we have updated addend. */
5055 return bfd_reloc_ok
;
5058 case BFD_RELOC_AARCH64_CALL26
:
5059 case BFD_RELOC_AARCH64_JUMP26
:
5060 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5063 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5065 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5066 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5067 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5068 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5069 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5070 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5071 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5072 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5073 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5074 base_got
= globals
->root
.sgot
;
5075 off
= h
->got
.offset
;
5077 if (base_got
== NULL
)
5080 if (off
== (bfd_vma
) -1)
5084 /* We can't use h->got.offset here to save state, or
5085 even just remember the offset, as finish_dynamic_symbol
5086 would use that as offset into .got. */
5088 if (globals
->root
.splt
!= NULL
)
5090 plt_index
= ((h
->plt
.offset
- globals
->plt_header_size
) /
5091 globals
->plt_entry_size
);
5092 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
5093 base_got
= globals
->root
.sgotplt
;
5097 plt_index
= h
->plt
.offset
/ globals
->plt_entry_size
;
5098 off
= plt_index
* GOT_ENTRY_SIZE
;
5099 base_got
= globals
->root
.igotplt
;
5102 if (h
->dynindx
== -1
5106 /* This references the local definition. We must
5107 initialize this entry in the global offset table.
5108 Since the offset must always be a multiple of 8,
5109 we use the least significant bit to record
5110 whether we have initialized it already.
5112 When doing a dynamic link, we create a .rela.got
5113 relocation entry to initialize the value. This
5114 is done in the finish_dynamic_symbol routine. */
5119 bfd_put_NN (output_bfd
, value
,
5120 base_got
->contents
+ off
);
5121 /* Note that this is harmless as -1 | 1 still is -1. */
5125 value
= (base_got
->output_section
->vma
5126 + base_got
->output_offset
+ off
);
5129 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
,
5131 unresolved_reloc_p
);
5135 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5136 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5137 addend
= (globals
->root
.sgot
->output_section
->vma
5138 + globals
->root
.sgot
->output_offset
);
5140 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5141 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5142 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5143 value
= (value
- globals
->root
.sgot
->output_section
->vma
5144 - globals
->root
.sgot
->output_offset
);
5149 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5150 addend
, weak_undef_p
);
5151 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
, howto
, value
);
5152 case BFD_RELOC_AARCH64_ADD_LO12
:
5153 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5160 case BFD_RELOC_AARCH64_NONE
:
5161 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5162 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5163 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5164 *unresolved_reloc_p
= FALSE
;
5165 return bfd_reloc_ok
;
5167 case BFD_RELOC_AARCH64_NN
:
5169 /* When generating a shared object or relocatable executable, these
5170 relocations are copied into the output file to be resolved at
5172 if (((bfd_link_pic (info
)
5173 || globals
->root
.is_relocatable_executable
)
5174 && (input_section
->flags
& SEC_ALLOC
)
5176 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5177 || h
->root
.type
!= bfd_link_hash_undefweak
))
5178 /* Or we are creating an executable, we may need to keep relocations
5179 for symbols satisfied by a dynamic library if we manage to avoid
5180 copy relocs for the symbol. */
5181 || (ELIMINATE_COPY_RELOCS
5182 && !bfd_link_pic (info
)
5184 && (input_section
->flags
& SEC_ALLOC
)
5189 || h
->root
.type
== bfd_link_hash_undefweak
5190 || h
->root
.type
== bfd_link_hash_undefined
)))
5192 Elf_Internal_Rela outrel
;
5194 bfd_boolean skip
, relocate
;
5197 *unresolved_reloc_p
= FALSE
;
5202 outrel
.r_addend
= signed_addend
;
5204 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5206 if (outrel
.r_offset
== (bfd_vma
) - 1)
5208 else if (outrel
.r_offset
== (bfd_vma
) - 2)
5214 outrel
.r_offset
+= (input_section
->output_section
->vma
5215 + input_section
->output_offset
);
5218 memset (&outrel
, 0, sizeof outrel
);
5221 && (!bfd_link_pic (info
)
5222 || !(bfd_link_pie (info
)
5223 || SYMBOLIC_BIND (info
, h
))
5224 || !h
->def_regular
))
5225 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5230 /* On SVR4-ish systems, the dynamic loader cannot
5231 relocate the text and data segments independently,
5232 so the symbol does not matter. */
5234 relocate
= globals
->no_apply_dynamic_relocs
? FALSE
: TRUE
;
5235 outrel
.r_info
= ELFNN_R_INFO (symbol
, AARCH64_R (RELATIVE
));
5236 outrel
.r_addend
+= value
;
5239 sreloc
= elf_section_data (input_section
)->sreloc
;
5240 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
5241 return bfd_reloc_notsupported
;
5243 loc
= sreloc
->contents
+ sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
5244 bfd_elfNN_swap_reloca_out (output_bfd
, &outrel
, loc
);
5246 if (sreloc
->reloc_count
* RELOC_SIZE (globals
) > sreloc
->size
)
5248 /* Sanity to check that we have previously allocated
5249 sufficient space in the relocation section for the
5250 number of relocations we actually want to emit. */
5254 /* If this reloc is against an external symbol, we do not want to
5255 fiddle with the addend. Otherwise, we need to include the symbol
5256 value so that it becomes an addend for the dynamic reloc. */
5258 return bfd_reloc_ok
;
5260 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5261 contents
, rel
->r_offset
, value
,
5265 value
+= signed_addend
;
5268 case BFD_RELOC_AARCH64_CALL26
:
5269 case BFD_RELOC_AARCH64_JUMP26
:
5271 asection
*splt
= globals
->root
.splt
;
5272 bfd_boolean via_plt_p
=
5273 splt
!= NULL
&& h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) - 1;
5275 /* A call to an undefined weak symbol is converted to a jump to
5276 the next instruction unless a PLT entry will be created.
5277 The jump to the next instruction is optimized as a NOP.
5278 Do the same for local undefined symbols. */
5279 if (weak_undef_p
&& ! via_plt_p
)
5281 bfd_putl32 (INSN_NOP
, hit_data
);
5282 return bfd_reloc_ok
;
5285 /* If the call goes through a PLT entry, make sure to
5286 check distance to the right destination address. */
5288 value
= (splt
->output_section
->vma
5289 + splt
->output_offset
+ h
->plt
.offset
);
5291 /* Check if a stub has to be inserted because the destination
5293 struct elf_aarch64_stub_hash_entry
*stub_entry
= NULL
;
5295 /* If the branch destination is directed to plt stub, "value" will be
5296 the final destination, otherwise we should plus signed_addend, it may
5297 contain non-zero value, for example call to local function symbol
5298 which are turned into "sec_sym + sec_off", and sec_off is kept in
5300 if (! aarch64_valid_branch_p (via_plt_p
? value
: value
+ signed_addend
,
5302 /* The target is out of reach, so redirect the branch to
5303 the local stub for this function. */
5304 stub_entry
= elfNN_aarch64_get_stub_entry (input_section
, sym_sec
, h
,
5306 if (stub_entry
!= NULL
)
5308 value
= (stub_entry
->stub_offset
5309 + stub_entry
->stub_sec
->output_offset
5310 + stub_entry
->stub_sec
->output_section
->vma
);
5312 /* We have redirected the destination to stub entry address,
5313 so ignore any addend record in the original rela entry. */
5317 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5318 signed_addend
, weak_undef_p
);
5319 *unresolved_reloc_p
= FALSE
;
5322 case BFD_RELOC_AARCH64_16_PCREL
:
5323 case BFD_RELOC_AARCH64_32_PCREL
:
5324 case BFD_RELOC_AARCH64_64_PCREL
:
5325 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
5326 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5327 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
5328 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
5329 if (bfd_link_pic (info
)
5330 && (input_section
->flags
& SEC_ALLOC
) != 0
5331 && (input_section
->flags
& SEC_READONLY
) != 0
5332 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
5334 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5337 /* xgettext:c-format */
5338 (_("%B: relocation %s against symbol `%s' which may bind "
5339 "externally can not be used when making a shared object; "
5340 "recompile with -fPIC"),
5341 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
5342 h
->root
.root
.string
);
5343 bfd_set_error (bfd_error_bad_value
);
5348 case BFD_RELOC_AARCH64_16
:
5350 case BFD_RELOC_AARCH64_32
:
5352 case BFD_RELOC_AARCH64_ADD_LO12
:
5353 case BFD_RELOC_AARCH64_BRANCH19
:
5354 case BFD_RELOC_AARCH64_LDST128_LO12
:
5355 case BFD_RELOC_AARCH64_LDST16_LO12
:
5356 case BFD_RELOC_AARCH64_LDST32_LO12
:
5357 case BFD_RELOC_AARCH64_LDST64_LO12
:
5358 case BFD_RELOC_AARCH64_LDST8_LO12
:
5359 case BFD_RELOC_AARCH64_MOVW_G0
:
5360 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
5361 case BFD_RELOC_AARCH64_MOVW_G0_S
:
5362 case BFD_RELOC_AARCH64_MOVW_G1
:
5363 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
5364 case BFD_RELOC_AARCH64_MOVW_G1_S
:
5365 case BFD_RELOC_AARCH64_MOVW_G2
:
5366 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
5367 case BFD_RELOC_AARCH64_MOVW_G2_S
:
5368 case BFD_RELOC_AARCH64_MOVW_G3
:
5369 case BFD_RELOC_AARCH64_TSTBR14
:
5370 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5371 signed_addend
, weak_undef_p
);
5374 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5375 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5376 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5377 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5378 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5379 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5380 if (globals
->root
.sgot
== NULL
)
5381 BFD_ASSERT (h
!= NULL
);
5386 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5388 unresolved_reloc_p
);
5389 if (bfd_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5390 || bfd_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
5391 addend
= (globals
->root
.sgot
->output_section
->vma
5392 + globals
->root
.sgot
->output_offset
);
5393 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5394 addend
, weak_undef_p
);
5399 struct elf_aarch64_local_symbol
*locals
5400 = elf_aarch64_locals (input_bfd
);
5404 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5406 /* xgettext:c-format */
5407 (_("%B: Local symbol descriptor table be NULL when applying "
5408 "relocation %s against local symbol"),
5409 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5413 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5414 base_got
= globals
->root
.sgot
;
5415 bfd_vma got_entry_addr
= (base_got
->output_section
->vma
5416 + base_got
->output_offset
+ off
);
5418 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5420 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
5422 if (bfd_link_pic (info
))
5425 Elf_Internal_Rela outrel
;
5427 /* For local symbol, we have done absolute relocation in static
5428 linking stageh. While for share library, we need to update
5429 the content of GOT entry according to the share objects
5430 loading base address. So we need to generate a
5431 R_AARCH64_RELATIVE reloc for dynamic linker. */
5432 s
= globals
->root
.srelgot
;
5436 outrel
.r_offset
= got_entry_addr
;
5437 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
5438 outrel
.r_addend
= value
;
5439 elf_append_rela (output_bfd
, s
, &outrel
);
5442 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5445 /* Update the relocation value to GOT entry addr as we have transformed
5446 the direct data access into indirect data access through GOT. */
5447 value
= got_entry_addr
;
5449 if (bfd_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5450 || bfd_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
5451 addend
= base_got
->output_section
->vma
+ base_got
->output_offset
;
5453 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5454 addend
, weak_undef_p
);
5459 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5460 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5461 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5463 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5465 unresolved_reloc_p
);
5468 struct elf_aarch64_local_symbol
*locals
5469 = elf_aarch64_locals (input_bfd
);
5473 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5475 /* xgettext:c-format */
5476 (_("%B: Local symbol descriptor table be NULL when applying "
5477 "relocation %s against local symbol"),
5478 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5482 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5483 base_got
= globals
->root
.sgot
;
5484 if (base_got
== NULL
)
5487 bfd_vma got_entry_addr
= (base_got
->output_section
->vma
5488 + base_got
->output_offset
+ off
);
5490 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5492 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
5494 if (bfd_link_pic (info
))
5497 Elf_Internal_Rela outrel
;
5499 /* For local symbol, we have done absolute relocation in static
5500 linking stage. While for share library, we need to update
5501 the content of GOT entry according to the share objects
5502 loading base address. So we need to generate a
5503 R_AARCH64_RELATIVE reloc for dynamic linker. */
5504 s
= globals
->root
.srelgot
;
5508 outrel
.r_offset
= got_entry_addr
;
5509 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
5510 outrel
.r_addend
= value
;
5511 elf_append_rela (output_bfd
, s
, &outrel
);
5514 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5518 /* Update the relocation value to GOT entry addr as we have transformed
5519 the direct data access into indirect data access through GOT. */
5520 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5521 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5523 *unresolved_reloc_p
= FALSE
;
5526 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5527 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5528 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5529 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5530 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
5531 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5532 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5533 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
5534 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
5535 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
5536 if (globals
->root
.sgot
== NULL
)
5537 return bfd_reloc_notsupported
;
5539 value
= (symbol_got_offset (input_bfd
, h
, r_symndx
)
5540 + globals
->root
.sgot
->output_section
->vma
5541 + globals
->root
.sgot
->output_offset
);
5543 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5545 *unresolved_reloc_p
= FALSE
;
5548 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
5549 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
5550 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
5551 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
5552 if (globals
->root
.sgot
== NULL
)
5553 return bfd_reloc_notsupported
;
5555 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5556 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5558 *unresolved_reloc_p
= FALSE
;
5561 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12
:
5562 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
:
5563 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC
:
5564 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12
:
5565 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC
:
5566 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12
:
5567 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC
:
5568 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12
:
5569 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC
:
5570 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12
:
5571 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC
:
5572 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0
:
5573 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC
:
5574 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1
:
5575 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC
:
5576 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2
:
5577 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5578 signed_addend
- dtpoff_base (info
),
5582 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
5583 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
5584 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5585 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
5586 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
5587 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
5588 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
5589 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
5590 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5591 signed_addend
- tpoff_base (info
),
5593 *unresolved_reloc_p
= FALSE
;
5596 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
5597 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5598 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5599 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
5600 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
5601 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5602 if (globals
->root
.sgot
== NULL
)
5603 return bfd_reloc_notsupported
;
5604 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
5605 + globals
->root
.sgotplt
->output_section
->vma
5606 + globals
->root
.sgotplt
->output_offset
5607 + globals
->sgotplt_jump_table_size
);
5609 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5611 *unresolved_reloc_p
= FALSE
;
5614 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
5615 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
5616 if (globals
->root
.sgot
== NULL
)
5617 return bfd_reloc_notsupported
;
5619 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
5620 + globals
->root
.sgotplt
->output_section
->vma
5621 + globals
->root
.sgotplt
->output_offset
5622 + globals
->sgotplt_jump_table_size
);
5624 value
-= (globals
->root
.sgot
->output_section
->vma
5625 + globals
->root
.sgot
->output_offset
);
5627 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5629 *unresolved_reloc_p
= FALSE
;
5633 return bfd_reloc_notsupported
;
5637 *saved_addend
= value
;
5639 /* Only apply the final relocation in a sequence. */
5641 return bfd_reloc_continue
;
5643 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5647 /* LP64 and ILP32 operates on x- and w-registers respectively.
5648 Next definitions take into account the difference between
5649 corresponding machine codes. R means x-register if the target
5650 arch is LP64, and w-register if the target is ILP32. */
5653 # define add_R0_R0 (0x91000000)
5654 # define add_R0_R0_R1 (0x8b000020)
5655 # define add_R0_R1 (0x91400020)
5656 # define ldr_R0 (0x58000000)
5657 # define ldr_R0_mask(i) (i & 0xffffffe0)
5658 # define ldr_R0_x0 (0xf9400000)
5659 # define ldr_hw_R0 (0xf2a00000)
5660 # define movk_R0 (0xf2800000)
5661 # define movz_R0 (0xd2a00000)
5662 # define movz_hw_R0 (0xd2c00000)
5663 #else /*ARCH_SIZE == 32 */
5664 # define add_R0_R0 (0x11000000)
5665 # define add_R0_R0_R1 (0x0b000020)
5666 # define add_R0_R1 (0x11400020)
5667 # define ldr_R0 (0x18000000)
5668 # define ldr_R0_mask(i) (i & 0xbfffffe0)
5669 # define ldr_R0_x0 (0xb9400000)
5670 # define ldr_hw_R0 (0x72a00000)
5671 # define movk_R0 (0x72800000)
5672 # define movz_R0 (0x52a00000)
5673 # define movz_hw_R0 (0x52c00000)
5676 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5677 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5680 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5681 is to then call final_link_relocate. Return other values in the
5684 static bfd_reloc_status_type
5685 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table
*globals
,
5686 bfd
*input_bfd
, bfd_byte
*contents
,
5687 Elf_Internal_Rela
*rel
, struct elf_link_hash_entry
*h
)
5689 bfd_boolean is_local
= h
== NULL
;
5690 unsigned int r_type
= ELFNN_R_TYPE (rel
->r_info
);
5693 BFD_ASSERT (globals
&& input_bfd
&& contents
&& rel
);
5695 switch (elfNN_aarch64_bfd_reloc_from_type (r_type
))
5697 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5698 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5701 /* GD->LE relaxation:
5702 adrp x0, :tlsgd:var => movz R0, :tprel_g1:var
5704 adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var
5706 Where R is x for LP64, and w for ILP32. */
5707 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
5708 return bfd_reloc_continue
;
5712 /* GD->IE relaxation:
5713 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5715 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5717 return bfd_reloc_continue
;
5720 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5724 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5727 /* Tiny TLSDESC->LE relaxation:
5728 ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var
5729 adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var
5733 Where R is x for LP64, and w for ILP32. */
5734 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
5735 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
5737 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5738 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
5739 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5741 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
5742 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 4);
5743 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
5744 return bfd_reloc_continue
;
5748 /* Tiny TLSDESC->IE relaxation:
5749 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5750 adr x0, :tlsdesc:var => nop
5754 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
5755 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
5757 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5758 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5760 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
5761 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
5762 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
5763 return bfd_reloc_continue
;
5766 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5769 /* Tiny GD->LE relaxation:
5770 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5771 bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12
5772 nop => add R0, R0, #:tprel_lo12_nc:x
5774 Where R is x for LP64, and x for Ilp32. */
5776 /* First kill the tls_get_addr reloc on the bl instruction. */
5777 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5779 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 0);
5780 bfd_putl32 (add_R0_R1
, contents
+ rel
->r_offset
+ 4);
5781 bfd_putl32 (add_R0_R0
, contents
+ rel
->r_offset
+ 8);
5783 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5784 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
));
5785 rel
[1].r_offset
= rel
->r_offset
+ 8;
5787 /* Move the current relocation to the second instruction in
5790 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5791 AARCH64_R (TLSLE_ADD_TPREL_HI12
));
5792 return bfd_reloc_continue
;
5796 /* Tiny GD->IE relaxation:
5797 adr x0, :tlsgd:var => ldr R0, :gottprel:var
5798 bl __tls_get_addr => mrs x1, tpidr_el0
5799 nop => add R0, R0, R1
5801 Where R is x for LP64, and w for Ilp32. */
5803 /* First kill the tls_get_addr reloc on the bl instruction. */
5804 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5805 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5807 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
5808 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
5809 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
5810 return bfd_reloc_continue
;
5814 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
5815 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSGD_MOVW_G0_NC
));
5816 BFD_ASSERT (rel
->r_offset
+ 12 == rel
[2].r_offset
);
5817 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (CALL26
));
5821 /* Large GD->LE relaxation:
5822 movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32
5823 movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16
5824 add x0, gp, x0 => movk x0, #:tprel_g0_nc:var
5825 bl __tls_get_addr => mrs x1, tpidr_el0
5826 nop => add x0, x0, x1
5828 rel
[2].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5829 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
5830 rel
[2].r_offset
= rel
->r_offset
+ 8;
5832 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
+ 0);
5833 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
+ 4);
5834 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 8);
5835 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
5836 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
5840 /* Large GD->IE relaxation:
5841 movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16
5842 movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var
5843 add x0, gp, x0 => ldr x0, [gp, x0]
5844 bl __tls_get_addr => mrs x1, tpidr_el0
5845 nop => add x0, x0, x1
5847 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5848 bfd_putl32 (0xd2a80000, contents
+ rel
->r_offset
+ 0);
5849 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
+ 8);
5850 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
5851 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
5853 return bfd_reloc_continue
;
5855 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
5856 return bfd_reloc_continue
;
5859 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5860 return bfd_reloc_continue
;
5862 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
5865 /* GD->LE relaxation:
5866 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5868 Where R is x for lp64 mode, and w for ILP32 mode. */
5869 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
5870 return bfd_reloc_continue
;
5874 /* GD->IE relaxation:
5875 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var]
5877 Where R is x for lp64 mode, and w for ILP32 mode. */
5878 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5879 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
5880 return bfd_reloc_continue
;
5883 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5886 /* GD->LE relaxation
5887 add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var
5888 bl __tls_get_addr => mrs x1, tpidr_el0
5889 nop => add R0, R1, R0
5891 Where R is x for lp64 mode, and w for ILP32 mode. */
5893 /* First kill the tls_get_addr reloc on the bl instruction. */
5894 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5895 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5897 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
5898 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
5899 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
5900 return bfd_reloc_continue
;
5904 /* GD->IE relaxation
5905 ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var]
5906 BL __tls_get_addr => mrs x1, tpidr_el0
5908 NOP => add R0, R1, R0
5910 Where R is x for lp64 mode, and w for ilp32 mode. */
5912 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
5914 /* Remove the relocation on the BL instruction. */
5915 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5917 /* We choose to fixup the BL and NOP instructions using the
5918 offset from the second relocation to allow flexibility in
5919 scheduling instructions between the ADD and BL. */
5920 bfd_putl32 (ldr_R0_x0
, contents
+ rel
->r_offset
);
5921 bfd_putl32 (0xd53bd041, contents
+ rel
[1].r_offset
);
5922 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
[1].r_offset
+ 4);
5923 return bfd_reloc_continue
;
5926 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5927 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
5928 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5929 /* GD->IE/LE relaxation:
5930 add x0, x0, #:tlsdesc_lo12:var => nop
5933 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
);
5934 return bfd_reloc_ok
;
5936 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5939 /* GD->LE relaxation:
5940 ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var
5942 Where R is x for lp64 mode, and w for ILP32 mode. */
5943 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
5944 return bfd_reloc_continue
;
5948 /* GD->IE relaxation:
5949 ldr xd, [gp, xn] => ldr R0, [gp, xn]
5951 Where R is x for lp64 mode, and w for ILP32 mode. */
5952 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5953 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
5954 return bfd_reloc_ok
;
5957 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
5958 /* GD->LE relaxation:
5959 movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16
5961 movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var
5963 Where R is x for lp64 mode, and w for ILP32 mode. */
5965 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
);
5966 return bfd_reloc_continue
;
5968 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
5971 /* GD->LE relaxation:
5972 movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32
5974 Where R is x for lp64 mode, and w for ILP32 mode. */
5975 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
);
5976 return bfd_reloc_continue
;
5980 /* GD->IE relaxation:
5981 movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16
5983 Where R is x for lp64 mode, and w for ILP32 mode. */
5984 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5985 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
5986 return bfd_reloc_continue
;
5989 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5990 /* IE->LE relaxation:
5991 adrp xd, :gottprel:var => movz Rd, :tprel_g1:var
5993 Where R is x for lp64 mode, and w for ILP32 mode. */
5996 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
5997 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
5999 return bfd_reloc_continue
;
6001 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6002 /* IE->LE relaxation:
6003 ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var
6005 Where R is x for lp64 mode, and w for ILP32 mode. */
6008 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6009 bfd_putl32 (movk_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6011 return bfd_reloc_continue
;
6013 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6014 /* LD->LE relaxation (tiny):
6015 adr x0, :tlsldm:x => mrs x0, tpidr_el0
6016 bl __tls_get_addr => add R0, R0, TCB_SIZE
6018 Where R is x for lp64 mode, and w for ilp32 mode. */
6021 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6022 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6023 /* No need of CALL26 relocation for tls_get_addr. */
6024 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6025 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
+ 0);
6026 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6027 contents
+ rel
->r_offset
+ 4);
6028 return bfd_reloc_ok
;
6030 return bfd_reloc_continue
;
6032 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6033 /* LD->LE relaxation (small):
6034 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
6038 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
);
6039 return bfd_reloc_ok
;
6041 return bfd_reloc_continue
;
6043 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6044 /* LD->LE relaxation (small):
6045 add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE
6046 bl __tls_get_addr => nop
6048 Where R is x for lp64 mode, and w for ilp32 mode. */
6051 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6052 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6053 /* No need of CALL26 relocation for tls_get_addr. */
6054 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6055 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6056 contents
+ rel
->r_offset
+ 0);
6057 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
6058 return bfd_reloc_ok
;
6060 return bfd_reloc_continue
;
6063 return bfd_reloc_continue
;
6066 return bfd_reloc_ok
;
6069 /* Relocate an AArch64 ELF section. */
6072 elfNN_aarch64_relocate_section (bfd
*output_bfd
,
6073 struct bfd_link_info
*info
,
6075 asection
*input_section
,
6077 Elf_Internal_Rela
*relocs
,
6078 Elf_Internal_Sym
*local_syms
,
6079 asection
**local_sections
)
6081 Elf_Internal_Shdr
*symtab_hdr
;
6082 struct elf_link_hash_entry
**sym_hashes
;
6083 Elf_Internal_Rela
*rel
;
6084 Elf_Internal_Rela
*relend
;
6086 struct elf_aarch64_link_hash_table
*globals
;
6087 bfd_boolean save_addend
= FALSE
;
6090 globals
= elf_aarch64_hash_table (info
);
6092 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
6093 sym_hashes
= elf_sym_hashes (input_bfd
);
6096 relend
= relocs
+ input_section
->reloc_count
;
6097 for (; rel
< relend
; rel
++)
6099 unsigned int r_type
;
6100 bfd_reloc_code_real_type bfd_r_type
;
6101 bfd_reloc_code_real_type relaxed_bfd_r_type
;
6102 reloc_howto_type
*howto
;
6103 unsigned long r_symndx
;
6104 Elf_Internal_Sym
*sym
;
6106 struct elf_link_hash_entry
*h
;
6108 bfd_reloc_status_type r
;
6111 bfd_boolean unresolved_reloc
= FALSE
;
6112 char *error_message
= NULL
;
6114 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6115 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6117 bfd_reloc
.howto
= elfNN_aarch64_howto_from_type (r_type
);
6118 howto
= bfd_reloc
.howto
;
6122 /* xgettext:c-format */
6124 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
6125 input_bfd
, r_type
, input_section
);
6128 bfd_r_type
= elfNN_aarch64_bfd_reloc_from_howto (howto
);
6134 if (r_symndx
< symtab_hdr
->sh_info
)
6136 sym
= local_syms
+ r_symndx
;
6137 sym_type
= ELFNN_ST_TYPE (sym
->st_info
);
6138 sec
= local_sections
[r_symndx
];
6140 /* An object file might have a reference to a local
6141 undefined symbol. This is a daft object file, but we
6142 should at least do something about it. */
6143 if (r_type
!= R_AARCH64_NONE
&& r_type
!= R_AARCH64_NULL
6144 && bfd_is_und_section (sec
)
6145 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
6146 (*info
->callbacks
->undefined_symbol
)
6147 (info
, bfd_elf_string_from_elf_section
6148 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
6149 input_bfd
, input_section
, rel
->r_offset
, TRUE
);
6151 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
6153 /* Relocate against local STT_GNU_IFUNC symbol. */
6154 if (!bfd_link_relocatable (info
)
6155 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
6157 h
= elfNN_aarch64_get_local_sym_hash (globals
, input_bfd
,
6162 /* Set STT_GNU_IFUNC symbol value. */
6163 h
->root
.u
.def
.value
= sym
->st_value
;
6164 h
->root
.u
.def
.section
= sec
;
6169 bfd_boolean warned
, ignored
;
6171 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
6172 r_symndx
, symtab_hdr
, sym_hashes
,
6174 unresolved_reloc
, warned
, ignored
);
6179 if (sec
!= NULL
&& discarded_section (sec
))
6180 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
6181 rel
, 1, relend
, howto
, 0, contents
);
6183 if (bfd_link_relocatable (info
))
6187 name
= h
->root
.root
.string
;
6190 name
= (bfd_elf_string_from_elf_section
6191 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
6192 if (name
== NULL
|| *name
== '\0')
6193 name
= bfd_section_name (input_bfd
, sec
);
6197 && r_type
!= R_AARCH64_NONE
6198 && r_type
!= R_AARCH64_NULL
6200 || h
->root
.type
== bfd_link_hash_defined
6201 || h
->root
.type
== bfd_link_hash_defweak
)
6202 && IS_AARCH64_TLS_RELOC (bfd_r_type
) != (sym_type
== STT_TLS
))
6205 ((sym_type
== STT_TLS
6206 /* xgettext:c-format */
6207 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
6208 /* xgettext:c-format */
6209 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
6211 input_section
, (long) rel
->r_offset
, howto
->name
, name
);
6214 /* We relax only if we can see that there can be a valid transition
6215 from a reloc type to another.
6216 We call elfNN_aarch64_final_link_relocate unless we're completely
6217 done, i.e., the relaxation produced the final output we want. */
6219 relaxed_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
,
6221 if (relaxed_bfd_r_type
!= bfd_r_type
)
6223 bfd_r_type
= relaxed_bfd_r_type
;
6224 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
6225 BFD_ASSERT (howto
!= NULL
);
6226 r_type
= howto
->type
;
6227 r
= elfNN_aarch64_tls_relax (globals
, input_bfd
, contents
, rel
, h
);
6228 unresolved_reloc
= 0;
6231 r
= bfd_reloc_continue
;
6233 /* There may be multiple consecutive relocations for the
6234 same offset. In that case we are supposed to treat the
6235 output of each relocation as the addend for the next. */
6236 if (rel
+ 1 < relend
6237 && rel
->r_offset
== rel
[1].r_offset
6238 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NONE
6239 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NULL
)
6242 save_addend
= FALSE
;
6244 if (r
== bfd_reloc_continue
)
6245 r
= elfNN_aarch64_final_link_relocate (howto
, input_bfd
, output_bfd
,
6246 input_section
, contents
, rel
,
6247 relocation
, info
, sec
,
6248 h
, &unresolved_reloc
,
6249 save_addend
, &addend
, sym
);
6251 switch (elfNN_aarch64_bfd_reloc_from_type (r_type
))
6253 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6254 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6255 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6256 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6257 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6258 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6259 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6260 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6261 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6263 bfd_boolean need_relocs
= FALSE
;
6268 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6269 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6272 (bfd_link_pic (info
) || indx
!= 0) &&
6274 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6275 || h
->root
.type
!= bfd_link_hash_undefweak
);
6277 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6281 Elf_Internal_Rela rela
;
6282 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPMOD
));
6284 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6285 globals
->root
.sgot
->output_offset
+ off
;
6288 loc
= globals
->root
.srelgot
->contents
;
6289 loc
+= globals
->root
.srelgot
->reloc_count
++
6290 * RELOC_SIZE (htab
);
6291 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6293 bfd_reloc_code_real_type real_type
=
6294 elfNN_aarch64_bfd_reloc_from_type (r_type
);
6296 if (real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6297 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6298 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
)
6300 /* For local dynamic, don't generate DTPREL in any case.
6301 Initialize the DTPREL slot into zero, so we get module
6302 base address when invoke runtime TLS resolver. */
6303 bfd_put_NN (output_bfd
, 0,
6304 globals
->root
.sgot
->contents
+ off
6309 bfd_put_NN (output_bfd
,
6310 relocation
- dtpoff_base (info
),
6311 globals
->root
.sgot
->contents
+ off
6316 /* This TLS symbol is global. We emit a
6317 relocation to fixup the tls offset at load
6320 ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPREL
));
6323 (globals
->root
.sgot
->output_section
->vma
6324 + globals
->root
.sgot
->output_offset
+ off
6327 loc
= globals
->root
.srelgot
->contents
;
6328 loc
+= globals
->root
.srelgot
->reloc_count
++
6329 * RELOC_SIZE (globals
);
6330 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6331 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6332 globals
->root
.sgot
->contents
+ off
6338 bfd_put_NN (output_bfd
, (bfd_vma
) 1,
6339 globals
->root
.sgot
->contents
+ off
);
6340 bfd_put_NN (output_bfd
,
6341 relocation
- dtpoff_base (info
),
6342 globals
->root
.sgot
->contents
+ off
6346 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6350 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6351 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6352 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6353 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6354 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6355 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6357 bfd_boolean need_relocs
= FALSE
;
6362 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6364 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6367 (bfd_link_pic (info
) || indx
!= 0) &&
6369 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6370 || h
->root
.type
!= bfd_link_hash_undefweak
);
6372 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6376 Elf_Internal_Rela rela
;
6379 rela
.r_addend
= relocation
- dtpoff_base (info
);
6383 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_TPREL
));
6384 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6385 globals
->root
.sgot
->output_offset
+ off
;
6387 loc
= globals
->root
.srelgot
->contents
;
6388 loc
+= globals
->root
.srelgot
->reloc_count
++
6389 * RELOC_SIZE (htab
);
6391 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6393 bfd_put_NN (output_bfd
, rela
.r_addend
,
6394 globals
->root
.sgot
->contents
+ off
);
6397 bfd_put_NN (output_bfd
, relocation
- tpoff_base (info
),
6398 globals
->root
.sgot
->contents
+ off
);
6400 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6404 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6405 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6406 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6407 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
6408 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6409 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6410 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6411 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6413 bfd_boolean need_relocs
= FALSE
;
6414 int indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6415 bfd_vma off
= symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
);
6417 need_relocs
= (h
== NULL
6418 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6419 || h
->root
.type
!= bfd_link_hash_undefweak
);
6421 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6422 BFD_ASSERT (globals
->root
.sgot
!= NULL
);
6427 Elf_Internal_Rela rela
;
6428 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLSDESC
));
6431 rela
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
6432 + globals
->root
.sgotplt
->output_offset
6433 + off
+ globals
->sgotplt_jump_table_size
);
6436 rela
.r_addend
= relocation
- dtpoff_base (info
);
6438 /* Allocate the next available slot in the PLT reloc
6439 section to hold our R_AARCH64_TLSDESC, the next
6440 available slot is determined from reloc_count,
6441 which we step. But note, reloc_count was
6442 artifically moved down while allocating slots for
6443 real PLT relocs such that all of the PLT relocs
6444 will fit above the initial reloc_count and the
6445 extra stuff will fit below. */
6446 loc
= globals
->root
.srelplt
->contents
;
6447 loc
+= globals
->root
.srelplt
->reloc_count
++
6448 * RELOC_SIZE (globals
);
6450 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6452 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6453 globals
->root
.sgotplt
->contents
+ off
+
6454 globals
->sgotplt_jump_table_size
);
6455 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6456 globals
->root
.sgotplt
->contents
+ off
+
6457 globals
->sgotplt_jump_table_size
+
6461 symbol_tlsdesc_got_offset_mark (input_bfd
, h
, r_symndx
);
6468 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6469 because such sections are not SEC_ALLOC and thus ld.so will
6470 not process them. */
6471 if (unresolved_reloc
6472 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
6474 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
6475 +rel
->r_offset
) != (bfd_vma
) - 1)
6478 /* xgettext:c-format */
6479 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6480 input_bfd
, input_section
, (long) rel
->r_offset
, howto
->name
,
6481 h
->root
.root
.string
);
6485 if (r
!= bfd_reloc_ok
&& r
!= bfd_reloc_continue
)
6487 bfd_reloc_code_real_type real_r_type
6488 = elfNN_aarch64_bfd_reloc_from_type (r_type
);
6492 case bfd_reloc_overflow
:
6493 (*info
->callbacks
->reloc_overflow
)
6494 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
, (bfd_vma
) 0,
6495 input_bfd
, input_section
, rel
->r_offset
);
6496 if (real_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
6497 || real_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
6499 (*info
->callbacks
->warning
)
6501 _("Too many GOT entries for -fpic, "
6502 "please recompile with -fPIC"),
6503 name
, input_bfd
, input_section
, rel
->r_offset
);
6506 /* Overflow can occur when a variable is referenced with a type
6507 that has a larger alignment than the type with which it was
6509 file1.c: extern int foo; int a (void) { return foo; }
6510 file2.c: char bar, foo, baz;
6511 If the variable is placed into a data section at an offset
6512 that is incompatible with the larger alignment requirement
6513 overflow will occur. (Strictly speaking this is not overflow
6514 but rather an alignment problem, but the bfd_reloc_ error
6515 enum does not have a value to cover that situation).
6517 Try to catch this situation here and provide a more helpful
6518 error message to the user. */
6519 if (addend
& ((1 << howto
->rightshift
) - 1)
6520 /* FIXME: Are we testing all of the appropriate reloc
6522 && (real_r_type
== BFD_RELOC_AARCH64_LD_LO19_PCREL
6523 || real_r_type
== BFD_RELOC_AARCH64_LDST16_LO12
6524 || real_r_type
== BFD_RELOC_AARCH64_LDST32_LO12
6525 || real_r_type
== BFD_RELOC_AARCH64_LDST64_LO12
6526 || real_r_type
== BFD_RELOC_AARCH64_LDST128_LO12
))
6528 info
->callbacks
->warning
6529 (info
, _("One possible cause of this error is that the \
6530 symbol is being referenced in the indicated code as if it had a larger \
6531 alignment than was declared where it was defined."),
6532 name
, input_bfd
, input_section
, rel
->r_offset
);
6536 case bfd_reloc_undefined
:
6537 (*info
->callbacks
->undefined_symbol
)
6538 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
6541 case bfd_reloc_outofrange
:
6542 error_message
= _("out of range");
6545 case bfd_reloc_notsupported
:
6546 error_message
= _("unsupported relocation");
6549 case bfd_reloc_dangerous
:
6550 /* error_message should already be set. */
6554 error_message
= _("unknown error");
6558 BFD_ASSERT (error_message
!= NULL
);
6559 (*info
->callbacks
->reloc_dangerous
)
6560 (info
, error_message
, input_bfd
, input_section
, rel
->r_offset
);
6572 /* Set the right machine number. */
6575 elfNN_aarch64_object_p (bfd
*abfd
)
6578 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64_ilp32
);
6580 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64
);
6585 /* Function to keep AArch64 specific flags in the ELF header. */
6588 elfNN_aarch64_set_private_flags (bfd
*abfd
, flagword flags
)
6590 if (elf_flags_init (abfd
) && elf_elfheader (abfd
)->e_flags
!= flags
)
6595 elf_elfheader (abfd
)->e_flags
= flags
;
6596 elf_flags_init (abfd
) = TRUE
;
6602 /* Merge backend specific data from an object file to the output
6603 object file when linking. */
6606 elfNN_aarch64_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
6608 bfd
*obfd
= info
->output_bfd
;
6611 bfd_boolean flags_compatible
= TRUE
;
6614 /* Check if we have the same endianess. */
6615 if (!_bfd_generic_verify_endian_match (ibfd
, info
))
6618 if (!is_aarch64_elf (ibfd
) || !is_aarch64_elf (obfd
))
6621 /* The input BFD must have had its flags initialised. */
6622 /* The following seems bogus to me -- The flags are initialized in
6623 the assembler but I don't think an elf_flags_init field is
6624 written into the object. */
6625 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6627 in_flags
= elf_elfheader (ibfd
)->e_flags
;
6628 out_flags
= elf_elfheader (obfd
)->e_flags
;
6630 if (!elf_flags_init (obfd
))
6632 /* If the input is the default architecture and had the default
6633 flags then do not bother setting the flags for the output
6634 architecture, instead allow future merges to do this. If no
6635 future merges ever set these flags then they will retain their
6636 uninitialised values, which surprise surprise, correspond
6637 to the default values. */
6638 if (bfd_get_arch_info (ibfd
)->the_default
6639 && elf_elfheader (ibfd
)->e_flags
== 0)
6642 elf_flags_init (obfd
) = TRUE
;
6643 elf_elfheader (obfd
)->e_flags
= in_flags
;
6645 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
6646 && bfd_get_arch_info (obfd
)->the_default
)
6647 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
6648 bfd_get_mach (ibfd
));
6653 /* Identical flags must be compatible. */
6654 if (in_flags
== out_flags
)
6657 /* Check to see if the input BFD actually contains any sections. If
6658 not, its flags may not have been initialised either, but it
6659 cannot actually cause any incompatiblity. Do not short-circuit
6660 dynamic objects; their section list may be emptied by
6661 elf_link_add_object_symbols.
6663 Also check to see if there are no code sections in the input.
6664 In this case there is no need to check for code specific flags.
6665 XXX - do we need to worry about floating-point format compatability
6666 in data sections ? */
6667 if (!(ibfd
->flags
& DYNAMIC
))
6669 bfd_boolean null_input_bfd
= TRUE
;
6670 bfd_boolean only_data_sections
= TRUE
;
6672 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6674 if ((bfd_get_section_flags (ibfd
, sec
)
6675 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
6676 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
6677 only_data_sections
= FALSE
;
6679 null_input_bfd
= FALSE
;
6683 if (null_input_bfd
|| only_data_sections
)
6687 return flags_compatible
;
6690 /* Display the flags field. */
6693 elfNN_aarch64_print_private_bfd_data (bfd
*abfd
, void *ptr
)
6695 FILE *file
= (FILE *) ptr
;
6696 unsigned long flags
;
6698 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
6700 /* Print normal ELF private data. */
6701 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
6703 flags
= elf_elfheader (abfd
)->e_flags
;
6704 /* Ignore init flag - it may not be set, despite the flags field
6705 containing valid data. */
6707 /* xgettext:c-format */
6708 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
6711 fprintf (file
, _("<Unrecognised flag bits set>"));
6718 /* Update the got entry reference counts for the section being removed. */
6721 elfNN_aarch64_gc_sweep_hook (bfd
*abfd
,
6722 struct bfd_link_info
*info
,
6724 const Elf_Internal_Rela
* relocs
)
6726 struct elf_aarch64_link_hash_table
*htab
;
6727 Elf_Internal_Shdr
*symtab_hdr
;
6728 struct elf_link_hash_entry
**sym_hashes
;
6729 struct elf_aarch64_local_symbol
*locals
;
6730 const Elf_Internal_Rela
*rel
, *relend
;
6732 if (bfd_link_relocatable (info
))
6735 htab
= elf_aarch64_hash_table (info
);
6740 elf_section_data (sec
)->local_dynrel
= NULL
;
6742 symtab_hdr
= &elf_symtab_hdr (abfd
);
6743 sym_hashes
= elf_sym_hashes (abfd
);
6745 locals
= elf_aarch64_locals (abfd
);
6747 relend
= relocs
+ sec
->reloc_count
;
6748 for (rel
= relocs
; rel
< relend
; rel
++)
6750 unsigned long r_symndx
;
6751 unsigned int r_type
;
6752 struct elf_link_hash_entry
*h
= NULL
;
6754 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6756 if (r_symndx
>= symtab_hdr
->sh_info
)
6759 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
6760 while (h
->root
.type
== bfd_link_hash_indirect
6761 || h
->root
.type
== bfd_link_hash_warning
)
6762 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6766 Elf_Internal_Sym
*isym
;
6768 /* A local symbol. */
6769 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
6772 /* Check relocation against local STT_GNU_IFUNC symbol. */
6774 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
6776 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
6784 struct elf_aarch64_link_hash_entry
*eh
;
6785 struct elf_dyn_relocs
**pp
;
6786 struct elf_dyn_relocs
*p
;
6788 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
6790 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
6793 /* Everything must go for SEC. */
6799 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6800 switch (aarch64_tls_transition (abfd
,info
, r_type
, h
,r_symndx
))
6802 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
6803 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
6804 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
6805 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
6806 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
6807 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
6808 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
6809 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
6810 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
6811 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6812 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6813 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6814 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
6815 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
6816 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6817 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6818 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6819 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6820 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6821 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6822 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6823 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6824 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6825 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
6826 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
6827 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6828 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6829 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6830 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6831 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6832 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6835 if (h
->got
.refcount
> 0)
6836 h
->got
.refcount
-= 1;
6838 if (h
->type
== STT_GNU_IFUNC
)
6840 if (h
->plt
.refcount
> 0)
6841 h
->plt
.refcount
-= 1;
6844 else if (locals
!= NULL
)
6846 if (locals
[r_symndx
].got_refcount
> 0)
6847 locals
[r_symndx
].got_refcount
-= 1;
6851 case BFD_RELOC_AARCH64_CALL26
:
6852 case BFD_RELOC_AARCH64_JUMP26
:
6853 /* If this is a local symbol then we resolve it
6854 directly without creating a PLT entry. */
6858 if (h
->plt
.refcount
> 0)
6859 h
->plt
.refcount
-= 1;
6862 case BFD_RELOC_AARCH64_ADD_LO12
:
6863 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
6864 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
6865 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
6866 case BFD_RELOC_AARCH64_LDST128_LO12
:
6867 case BFD_RELOC_AARCH64_LDST16_LO12
:
6868 case BFD_RELOC_AARCH64_LDST32_LO12
:
6869 case BFD_RELOC_AARCH64_LDST64_LO12
:
6870 case BFD_RELOC_AARCH64_LDST8_LO12
:
6871 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
6872 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
6873 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
6874 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
6875 case BFD_RELOC_AARCH64_MOVW_G3
:
6876 case BFD_RELOC_AARCH64_NN
:
6877 if (h
!= NULL
&& !bfd_link_pic (info
))
6879 if (h
->plt
.refcount
> 0)
6880 h
->plt
.refcount
-= 1;
6892 /* Return true if we need copy relocation against EH. */
6895 need_copy_relocation_p (struct elf_aarch64_link_hash_entry
*eh
)
6897 struct elf_dyn_relocs
*p
;
6900 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
6902 /* If there is any pc-relative reference, we need to keep copy relocation
6903 to avoid propagating the relocation into runtime that current glibc
6904 does not support. */
6908 s
= p
->sec
->output_section
;
6909 /* Need copy relocation if it's against read-only section. */
6910 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
6917 /* Adjust a symbol defined by a dynamic object and referenced by a
6918 regular object. The current definition is in some section of the
6919 dynamic object, but we're not including those sections. We have to
6920 change the definition to something the rest of the link can
6924 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
6925 struct elf_link_hash_entry
*h
)
6927 struct elf_aarch64_link_hash_table
*htab
;
6930 /* If this is a function, put it in the procedure linkage table. We
6931 will fill in the contents of the procedure linkage table later,
6932 when we know the address of the .got section. */
6933 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
6935 if (h
->plt
.refcount
<= 0
6936 || (h
->type
!= STT_GNU_IFUNC
6937 && (SYMBOL_CALLS_LOCAL (info
, h
)
6938 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
6939 && h
->root
.type
== bfd_link_hash_undefweak
))))
6941 /* This case can occur if we saw a CALL26 reloc in
6942 an input file, but the symbol wasn't referred to
6943 by a dynamic object or all references were
6944 garbage collected. In which case we can end up
6946 h
->plt
.offset
= (bfd_vma
) - 1;
6953 /* Otherwise, reset to -1. */
6954 h
->plt
.offset
= (bfd_vma
) - 1;
6957 /* If this is a weak symbol, and there is a real definition, the
6958 processor independent code will have arranged for us to see the
6959 real definition first, and we can just use the same value. */
6960 if (h
->u
.weakdef
!= NULL
)
6962 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
6963 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
6964 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
6965 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
6966 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
6967 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
6971 /* If we are creating a shared library, we must presume that the
6972 only references to the symbol are via the global offset table.
6973 For such cases we need not do anything here; the relocations will
6974 be handled correctly by relocate_section. */
6975 if (bfd_link_pic (info
))
6978 /* If there are no references to this symbol that do not use the
6979 GOT, we don't need to generate a copy reloc. */
6980 if (!h
->non_got_ref
)
6983 /* If -z nocopyreloc was given, we won't generate them either. */
6984 if (info
->nocopyreloc
)
6990 if (ELIMINATE_COPY_RELOCS
)
6992 struct elf_aarch64_link_hash_entry
*eh
;
6993 /* If we didn't find any dynamic relocs in read-only sections, then
6994 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6995 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
6996 if (!need_copy_relocation_p (eh
))
7003 /* We must allocate the symbol in our .dynbss section, which will
7004 become part of the .bss section of the executable. There will be
7005 an entry for this symbol in the .dynsym section. The dynamic
7006 object will contain position independent code, so all references
7007 from the dynamic object to this symbol will go through the global
7008 offset table. The dynamic linker will use the .dynsym entry to
7009 determine the address it must put in the global offset table, so
7010 both the dynamic object and the regular object will refer to the
7011 same memory location for the variable. */
7013 htab
= elf_aarch64_hash_table (info
);
7015 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
7016 to copy the initial value out of the dynamic object and into the
7017 runtime process image. */
7018 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
7020 s
= htab
->root
.sdynrelro
;
7021 srel
= htab
->root
.sreldynrelro
;
7025 s
= htab
->root
.sdynbss
;
7026 srel
= htab
->root
.srelbss
;
7028 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
7030 srel
->size
+= RELOC_SIZE (htab
);
7034 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
7039 elfNN_aarch64_allocate_local_symbols (bfd
*abfd
, unsigned number
)
7041 struct elf_aarch64_local_symbol
*locals
;
7042 locals
= elf_aarch64_locals (abfd
);
7045 locals
= (struct elf_aarch64_local_symbol
*)
7046 bfd_zalloc (abfd
, number
* sizeof (struct elf_aarch64_local_symbol
));
7049 elf_aarch64_locals (abfd
) = locals
;
7054 /* Create the .got section to hold the global offset table. */
7057 aarch64_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
7059 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7062 struct elf_link_hash_entry
*h
;
7063 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7065 /* This function may be called more than once. */
7066 if (htab
->sgot
!= NULL
)
7069 flags
= bed
->dynamic_sec_flags
;
7071 s
= bfd_make_section_anyway_with_flags (abfd
,
7072 (bed
->rela_plts_and_copies_p
7073 ? ".rela.got" : ".rel.got"),
7074 (bed
->dynamic_sec_flags
7077 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
7081 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
7083 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
7086 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
7088 if (bed
->want_got_sym
)
7090 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
7091 (or .got.plt) section. We don't do this in the linker script
7092 because we don't want to define the symbol if we are not creating
7093 a global offset table. */
7094 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
7095 "_GLOBAL_OFFSET_TABLE_");
7096 elf_hash_table (info
)->hgot
= h
;
7101 if (bed
->want_got_plt
)
7103 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
7105 || !bfd_set_section_alignment (abfd
, s
,
7106 bed
->s
->log_file_align
))
7111 /* The first bit of the global offset table is the header. */
7112 s
->size
+= bed
->got_header_size
;
7117 /* Look through the relocs for a section during the first phase. */
7120 elfNN_aarch64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
7121 asection
*sec
, const Elf_Internal_Rela
*relocs
)
7123 Elf_Internal_Shdr
*symtab_hdr
;
7124 struct elf_link_hash_entry
**sym_hashes
;
7125 const Elf_Internal_Rela
*rel
;
7126 const Elf_Internal_Rela
*rel_end
;
7129 struct elf_aarch64_link_hash_table
*htab
;
7131 if (bfd_link_relocatable (info
))
7134 BFD_ASSERT (is_aarch64_elf (abfd
));
7136 htab
= elf_aarch64_hash_table (info
);
7139 symtab_hdr
= &elf_symtab_hdr (abfd
);
7140 sym_hashes
= elf_sym_hashes (abfd
);
7142 rel_end
= relocs
+ sec
->reloc_count
;
7143 for (rel
= relocs
; rel
< rel_end
; rel
++)
7145 struct elf_link_hash_entry
*h
;
7146 unsigned long r_symndx
;
7147 unsigned int r_type
;
7148 bfd_reloc_code_real_type bfd_r_type
;
7149 Elf_Internal_Sym
*isym
;
7151 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
7152 r_type
= ELFNN_R_TYPE (rel
->r_info
);
7154 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
7156 /* xgettext:c-format */
7157 _bfd_error_handler (_("%B: bad symbol index: %d"), abfd
, r_symndx
);
7161 if (r_symndx
< symtab_hdr
->sh_info
)
7163 /* A local symbol. */
7164 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
7169 /* Check relocation against local STT_GNU_IFUNC symbol. */
7170 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
7172 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
,
7177 /* Fake a STT_GNU_IFUNC symbol. */
7178 h
->type
= STT_GNU_IFUNC
;
7181 h
->forced_local
= 1;
7182 h
->root
.type
= bfd_link_hash_defined
;
7189 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
7190 while (h
->root
.type
== bfd_link_hash_indirect
7191 || h
->root
.type
== bfd_link_hash_warning
)
7192 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7194 /* PR15323, ref flags aren't set for references in the same
7196 h
->root
.non_ir_ref_regular
= 1;
7199 /* Could be done earlier, if h were already available. */
7200 bfd_r_type
= aarch64_tls_transition (abfd
, info
, r_type
, h
, r_symndx
);
7204 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
7205 This shows up in particular in an R_AARCH64_PREL64 in large model
7206 when calculating the pc-relative address to .got section which is
7207 used to initialize the gp register. */
7208 if (h
->root
.root
.string
7209 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
7211 if (htab
->root
.dynobj
== NULL
)
7212 htab
->root
.dynobj
= abfd
;
7214 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7217 BFD_ASSERT (h
== htab
->root
.hgot
);
7220 /* Create the ifunc sections for static executables. If we
7221 never see an indirect function symbol nor we are building
7222 a static executable, those sections will be empty and
7223 won't appear in output. */
7229 case BFD_RELOC_AARCH64_ADD_LO12
:
7230 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7231 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7232 case BFD_RELOC_AARCH64_CALL26
:
7233 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7234 case BFD_RELOC_AARCH64_JUMP26
:
7235 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7236 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7237 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7238 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7239 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7240 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7241 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7242 case BFD_RELOC_AARCH64_NN
:
7243 if (htab
->root
.dynobj
== NULL
)
7244 htab
->root
.dynobj
= abfd
;
7245 if (!_bfd_elf_create_ifunc_sections (htab
->root
.dynobj
, info
))
7250 /* It is referenced by a non-shared object. */
7252 h
->root
.non_ir_ref_regular
= 1;
7257 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
7258 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
7259 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
7260 case BFD_RELOC_AARCH64_MOVW_G3
:
7261 if (bfd_link_pic (info
))
7263 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7265 /* xgettext:c-format */
7266 (_("%B: relocation %s against `%s' can not be used when making "
7267 "a shared object; recompile with -fPIC"),
7268 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7269 (h
) ? h
->root
.root
.string
: "a local symbol");
7270 bfd_set_error (bfd_error_bad_value
);
7275 case BFD_RELOC_AARCH64_16_PCREL
:
7276 case BFD_RELOC_AARCH64_32_PCREL
:
7277 case BFD_RELOC_AARCH64_64_PCREL
:
7278 case BFD_RELOC_AARCH64_ADD_LO12
:
7279 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
7280 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7281 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
7282 case BFD_RELOC_AARCH64_LDST128_LO12
:
7283 case BFD_RELOC_AARCH64_LDST16_LO12
:
7284 case BFD_RELOC_AARCH64_LDST32_LO12
:
7285 case BFD_RELOC_AARCH64_LDST64_LO12
:
7286 case BFD_RELOC_AARCH64_LDST8_LO12
:
7287 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
7288 if (h
== NULL
|| bfd_link_pic (info
))
7292 case BFD_RELOC_AARCH64_NN
:
7294 /* We don't need to handle relocs into sections not going into
7295 the "real" output. */
7296 if ((sec
->flags
& SEC_ALLOC
) == 0)
7301 if (!bfd_link_pic (info
))
7304 h
->plt
.refcount
+= 1;
7305 h
->pointer_equality_needed
= 1;
7308 /* No need to do anything if we're not creating a shared
7310 if (!(bfd_link_pic (info
)
7311 /* If on the other hand, we are creating an executable, we
7312 may need to keep relocations for symbols satisfied by a
7313 dynamic library if we manage to avoid copy relocs for the
7316 NOTE: Currently, there is no support of copy relocs
7317 elimination on pc-relative relocation types, because there is
7318 no dynamic relocation support for them in glibc. We still
7319 record the dynamic symbol reference for them. This is
7320 because one symbol may be referenced by both absolute
7321 relocation (for example, BFD_RELOC_AARCH64_NN) and
7322 pc-relative relocation. We need full symbol reference
7323 information to make correct decision later in
7324 elfNN_aarch64_adjust_dynamic_symbol. */
7325 || (ELIMINATE_COPY_RELOCS
7326 && !bfd_link_pic (info
)
7328 && (h
->root
.type
== bfd_link_hash_defweak
7329 || !h
->def_regular
))))
7333 struct elf_dyn_relocs
*p
;
7334 struct elf_dyn_relocs
**head
;
7335 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7337 /* We must copy these reloc types into the output file.
7338 Create a reloc section in dynobj and make room for
7342 if (htab
->root
.dynobj
== NULL
)
7343 htab
->root
.dynobj
= abfd
;
7345 sreloc
= _bfd_elf_make_dynamic_reloc_section
7346 (sec
, htab
->root
.dynobj
, LOG_FILE_ALIGN
, abfd
, /*rela? */ TRUE
);
7352 /* If this is a global symbol, we count the number of
7353 relocations we need for this symbol. */
7356 struct elf_aarch64_link_hash_entry
*eh
;
7357 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
7358 head
= &eh
->dyn_relocs
;
7362 /* Track dynamic relocs needed for local syms too.
7363 We really need local syms available to do this
7369 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
7374 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
7378 /* Beware of type punned pointers vs strict aliasing
7380 vpp
= &(elf_section_data (s
)->local_dynrel
);
7381 head
= (struct elf_dyn_relocs
**) vpp
;
7385 if (p
== NULL
|| p
->sec
!= sec
)
7387 bfd_size_type amt
= sizeof *p
;
7388 p
= ((struct elf_dyn_relocs
*)
7389 bfd_zalloc (htab
->root
.dynobj
, amt
));
7399 if (elfNN_aarch64_howto_table
[howto_index
].pc_relative
)
7404 /* RR: We probably want to keep a consistency check that
7405 there are no dangling GOT_PAGE relocs. */
7406 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7407 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7408 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7409 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7410 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7411 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7412 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7413 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7414 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7415 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
7416 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7417 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7418 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
7419 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
7420 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7421 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
7422 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
7423 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
7424 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
7425 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
7426 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
7427 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
7428 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
7429 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
7430 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
7431 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
7432 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
7433 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
7434 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
7435 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
7436 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
7437 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
7438 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
7439 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
7442 unsigned old_got_type
;
7444 got_type
= aarch64_reloc_got_type (bfd_r_type
);
7448 h
->got
.refcount
+= 1;
7449 old_got_type
= elf_aarch64_hash_entry (h
)->got_type
;
7453 struct elf_aarch64_local_symbol
*locals
;
7455 if (!elfNN_aarch64_allocate_local_symbols
7456 (abfd
, symtab_hdr
->sh_info
))
7459 locals
= elf_aarch64_locals (abfd
);
7460 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7461 locals
[r_symndx
].got_refcount
+= 1;
7462 old_got_type
= locals
[r_symndx
].got_type
;
7465 /* If a variable is accessed with both general dynamic TLS
7466 methods, two slots may be created. */
7467 if (GOT_TLS_GD_ANY_P (old_got_type
) && GOT_TLS_GD_ANY_P (got_type
))
7468 got_type
|= old_got_type
;
7470 /* We will already have issued an error message if there
7471 is a TLS/non-TLS mismatch, based on the symbol type.
7472 So just combine any TLS types needed. */
7473 if (old_got_type
!= GOT_UNKNOWN
&& old_got_type
!= GOT_NORMAL
7474 && got_type
!= GOT_NORMAL
)
7475 got_type
|= old_got_type
;
7477 /* If the symbol is accessed by both IE and GD methods, we
7478 are able to relax. Turn off the GD flag, without
7479 messing up with any other kind of TLS types that may be
7481 if ((got_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (got_type
))
7482 got_type
&= ~ (GOT_TLSDESC_GD
| GOT_TLS_GD
);
7484 if (old_got_type
!= got_type
)
7487 elf_aarch64_hash_entry (h
)->got_type
= got_type
;
7490 struct elf_aarch64_local_symbol
*locals
;
7491 locals
= elf_aarch64_locals (abfd
);
7492 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7493 locals
[r_symndx
].got_type
= got_type
;
7497 if (htab
->root
.dynobj
== NULL
)
7498 htab
->root
.dynobj
= abfd
;
7499 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7504 case BFD_RELOC_AARCH64_CALL26
:
7505 case BFD_RELOC_AARCH64_JUMP26
:
7506 /* If this is a local symbol then we resolve it
7507 directly without creating a PLT entry. */
7512 if (h
->plt
.refcount
<= 0)
7513 h
->plt
.refcount
= 1;
7515 h
->plt
.refcount
+= 1;
7526 /* Treat mapping symbols as special target symbols. */
7529 elfNN_aarch64_is_target_special_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
7532 return bfd_is_aarch64_special_symbol_name (sym
->name
,
7533 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
);
7536 /* This is a copy of elf_find_function () from elf.c except that
7537 AArch64 mapping symbols are ignored when looking for function names. */
7540 aarch64_elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
7544 const char **filename_ptr
,
7545 const char **functionname_ptr
)
7547 const char *filename
= NULL
;
7548 asymbol
*func
= NULL
;
7549 bfd_vma low_func
= 0;
7552 for (p
= symbols
; *p
!= NULL
; p
++)
7556 q
= (elf_symbol_type
*) * p
;
7558 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
7563 filename
= bfd_asymbol_name (&q
->symbol
);
7567 /* Skip mapping symbols. */
7568 if ((q
->symbol
.flags
& BSF_LOCAL
)
7569 && (bfd_is_aarch64_special_symbol_name
7570 (q
->symbol
.name
, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
)))
7573 if (bfd_get_section (&q
->symbol
) == section
7574 && q
->symbol
.value
>= low_func
&& q
->symbol
.value
<= offset
)
7576 func
= (asymbol
*) q
;
7577 low_func
= q
->symbol
.value
;
7587 *filename_ptr
= filename
;
7588 if (functionname_ptr
)
7589 *functionname_ptr
= bfd_asymbol_name (func
);
7595 /* Find the nearest line to a particular section and offset, for error
7596 reporting. This code is a duplicate of the code in elf.c, except
7597 that it uses aarch64_elf_find_function. */
7600 elfNN_aarch64_find_nearest_line (bfd
*abfd
,
7604 const char **filename_ptr
,
7605 const char **functionname_ptr
,
7606 unsigned int *line_ptr
,
7607 unsigned int *discriminator_ptr
)
7609 bfd_boolean found
= FALSE
;
7611 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
7612 filename_ptr
, functionname_ptr
,
7613 line_ptr
, discriminator_ptr
,
7614 dwarf_debug_sections
, 0,
7615 &elf_tdata (abfd
)->dwarf2_find_line_info
))
7617 if (!*functionname_ptr
)
7618 aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
7619 *filename_ptr
? NULL
: filename_ptr
,
7625 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
7626 toolchain uses DWARF1. */
7628 if (!_bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
7629 &found
, filename_ptr
,
7630 functionname_ptr
, line_ptr
,
7631 &elf_tdata (abfd
)->line_info
))
7634 if (found
&& (*functionname_ptr
|| *line_ptr
))
7637 if (symbols
== NULL
)
7640 if (!aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
7641 filename_ptr
, functionname_ptr
))
7649 elfNN_aarch64_find_inliner_info (bfd
*abfd
,
7650 const char **filename_ptr
,
7651 const char **functionname_ptr
,
7652 unsigned int *line_ptr
)
7655 found
= _bfd_dwarf2_find_inliner_info
7656 (abfd
, filename_ptr
,
7657 functionname_ptr
, line_ptr
, &elf_tdata (abfd
)->dwarf2_find_line_info
);
7663 elfNN_aarch64_post_process_headers (bfd
*abfd
,
7664 struct bfd_link_info
*link_info
)
7666 Elf_Internal_Ehdr
*i_ehdrp
; /* ELF file header, internal form. */
7668 i_ehdrp
= elf_elfheader (abfd
);
7669 i_ehdrp
->e_ident
[EI_ABIVERSION
] = AARCH64_ELF_ABI_VERSION
;
7671 _bfd_elf_post_process_headers (abfd
, link_info
);
7674 static enum elf_reloc_type_class
7675 elfNN_aarch64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7676 const asection
*rel_sec ATTRIBUTE_UNUSED
,
7677 const Elf_Internal_Rela
*rela
)
7679 switch ((int) ELFNN_R_TYPE (rela
->r_info
))
7681 case AARCH64_R (RELATIVE
):
7682 return reloc_class_relative
;
7683 case AARCH64_R (JUMP_SLOT
):
7684 return reloc_class_plt
;
7685 case AARCH64_R (COPY
):
7686 return reloc_class_copy
;
7688 return reloc_class_normal
;
7692 /* Handle an AArch64 specific section when reading an object file. This is
7693 called when bfd_section_from_shdr finds a section with an unknown
7697 elfNN_aarch64_section_from_shdr (bfd
*abfd
,
7698 Elf_Internal_Shdr
*hdr
,
7699 const char *name
, int shindex
)
7701 /* There ought to be a place to keep ELF backend specific flags, but
7702 at the moment there isn't one. We just keep track of the
7703 sections by their name, instead. Fortunately, the ABI gives
7704 names for all the AArch64 specific sections, so we will probably get
7706 switch (hdr
->sh_type
)
7708 case SHT_AARCH64_ATTRIBUTES
:
7715 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
7721 /* A structure used to record a list of sections, independently
7722 of the next and prev fields in the asection structure. */
7723 typedef struct section_list
7726 struct section_list
*next
;
7727 struct section_list
*prev
;
7731 /* Unfortunately we need to keep a list of sections for which
7732 an _aarch64_elf_section_data structure has been allocated. This
7733 is because it is possible for functions like elfNN_aarch64_write_section
7734 to be called on a section which has had an elf_data_structure
7735 allocated for it (and so the used_by_bfd field is valid) but
7736 for which the AArch64 extended version of this structure - the
7737 _aarch64_elf_section_data structure - has not been allocated. */
7738 static section_list
*sections_with_aarch64_elf_section_data
= NULL
;
7741 record_section_with_aarch64_elf_section_data (asection
*sec
)
7743 struct section_list
*entry
;
7745 entry
= bfd_malloc (sizeof (*entry
));
7749 entry
->next
= sections_with_aarch64_elf_section_data
;
7751 if (entry
->next
!= NULL
)
7752 entry
->next
->prev
= entry
;
7753 sections_with_aarch64_elf_section_data
= entry
;
7756 static struct section_list
*
7757 find_aarch64_elf_section_entry (asection
*sec
)
7759 struct section_list
*entry
;
7760 static struct section_list
*last_entry
= NULL
;
7762 /* This is a short cut for the typical case where the sections are added
7763 to the sections_with_aarch64_elf_section_data list in forward order and
7764 then looked up here in backwards order. This makes a real difference
7765 to the ld-srec/sec64k.exp linker test. */
7766 entry
= sections_with_aarch64_elf_section_data
;
7767 if (last_entry
!= NULL
)
7769 if (last_entry
->sec
== sec
)
7771 else if (last_entry
->next
!= NULL
&& last_entry
->next
->sec
== sec
)
7772 entry
= last_entry
->next
;
7775 for (; entry
; entry
= entry
->next
)
7776 if (entry
->sec
== sec
)
7780 /* Record the entry prior to this one - it is the entry we are
7781 most likely to want to locate next time. Also this way if we
7782 have been called from
7783 unrecord_section_with_aarch64_elf_section_data () we will not
7784 be caching a pointer that is about to be freed. */
7785 last_entry
= entry
->prev
;
7791 unrecord_section_with_aarch64_elf_section_data (asection
*sec
)
7793 struct section_list
*entry
;
7795 entry
= find_aarch64_elf_section_entry (sec
);
7799 if (entry
->prev
!= NULL
)
7800 entry
->prev
->next
= entry
->next
;
7801 if (entry
->next
!= NULL
)
7802 entry
->next
->prev
= entry
->prev
;
7803 if (entry
== sections_with_aarch64_elf_section_data
)
7804 sections_with_aarch64_elf_section_data
= entry
->next
;
7813 struct bfd_link_info
*info
;
7816 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
7817 asection
*, struct elf_link_hash_entry
*);
7818 } output_arch_syminfo
;
7820 enum map_symbol_type
7827 /* Output a single mapping symbol. */
7830 elfNN_aarch64_output_map_sym (output_arch_syminfo
*osi
,
7831 enum map_symbol_type type
, bfd_vma offset
)
7833 static const char *names
[2] = { "$x", "$d" };
7834 Elf_Internal_Sym sym
;
7836 sym
.st_value
= (osi
->sec
->output_section
->vma
7837 + osi
->sec
->output_offset
+ offset
);
7840 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
7841 sym
.st_shndx
= osi
->sec_shndx
;
7842 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
7845 /* Output a single local symbol for a generated stub. */
7848 elfNN_aarch64_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
7849 bfd_vma offset
, bfd_vma size
)
7851 Elf_Internal_Sym sym
;
7853 sym
.st_value
= (osi
->sec
->output_section
->vma
7854 + osi
->sec
->output_offset
+ offset
);
7857 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7858 sym
.st_shndx
= osi
->sec_shndx
;
7859 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
7863 aarch64_map_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
7865 struct elf_aarch64_stub_hash_entry
*stub_entry
;
7869 output_arch_syminfo
*osi
;
7871 /* Massage our args to the form they really have. */
7872 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
7873 osi
= (output_arch_syminfo
*) in_arg
;
7875 stub_sec
= stub_entry
->stub_sec
;
7877 /* Ensure this stub is attached to the current section being
7879 if (stub_sec
!= osi
->sec
)
7882 addr
= (bfd_vma
) stub_entry
->stub_offset
;
7884 stub_name
= stub_entry
->output_name
;
7886 switch (stub_entry
->stub_type
)
7888 case aarch64_stub_adrp_branch
:
7889 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7890 sizeof (aarch64_adrp_branch_stub
)))
7892 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7895 case aarch64_stub_long_branch
:
7896 if (!elfNN_aarch64_output_stub_sym
7897 (osi
, stub_name
, addr
, sizeof (aarch64_long_branch_stub
)))
7899 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7901 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_DATA
, addr
+ 16))
7904 case aarch64_stub_erratum_835769_veneer
:
7905 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7906 sizeof (aarch64_erratum_835769_stub
)))
7908 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7911 case aarch64_stub_erratum_843419_veneer
:
7912 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7913 sizeof (aarch64_erratum_843419_stub
)))
7915 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7926 /* Output mapping symbols for linker generated sections. */
7929 elfNN_aarch64_output_arch_local_syms (bfd
*output_bfd
,
7930 struct bfd_link_info
*info
,
7932 int (*func
) (void *, const char *,
7935 struct elf_link_hash_entry
7938 output_arch_syminfo osi
;
7939 struct elf_aarch64_link_hash_table
*htab
;
7941 htab
= elf_aarch64_hash_table (info
);
7947 /* Long calls stubs. */
7948 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
7952 for (stub_sec
= htab
->stub_bfd
->sections
;
7953 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
7955 /* Ignore non-stub sections. */
7956 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
7961 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
7962 (output_bfd
, osi
.sec
->output_section
);
7964 /* The first instruction in a stub is always a branch. */
7965 if (!elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0))
7968 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_map_one_stub
,
7973 /* Finally, output mapping symbols for the PLT. */
7974 if (!htab
->root
.splt
|| htab
->root
.splt
->size
== 0)
7977 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
7978 (output_bfd
, htab
->root
.splt
->output_section
);
7979 osi
.sec
= htab
->root
.splt
;
7981 elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0);
7987 /* Allocate target specific section data. */
7990 elfNN_aarch64_new_section_hook (bfd
*abfd
, asection
*sec
)
7992 if (!sec
->used_by_bfd
)
7994 _aarch64_elf_section_data
*sdata
;
7995 bfd_size_type amt
= sizeof (*sdata
);
7997 sdata
= bfd_zalloc (abfd
, amt
);
8000 sec
->used_by_bfd
= sdata
;
8003 record_section_with_aarch64_elf_section_data (sec
);
8005 return _bfd_elf_new_section_hook (abfd
, sec
);
8010 unrecord_section_via_map_over_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
8012 void *ignore ATTRIBUTE_UNUSED
)
8014 unrecord_section_with_aarch64_elf_section_data (sec
);
8018 elfNN_aarch64_close_and_cleanup (bfd
*abfd
)
8021 bfd_map_over_sections (abfd
,
8022 unrecord_section_via_map_over_sections
, NULL
);
8024 return _bfd_elf_close_and_cleanup (abfd
);
8028 elfNN_aarch64_bfd_free_cached_info (bfd
*abfd
)
8031 bfd_map_over_sections (abfd
,
8032 unrecord_section_via_map_over_sections
, NULL
);
8034 return _bfd_free_cached_info (abfd
);
8037 /* Create dynamic sections. This is different from the ARM backend in that
8038 the got, plt, gotplt and their relocation sections are all created in the
8039 standard part of the bfd elf backend. */
8042 elfNN_aarch64_create_dynamic_sections (bfd
*dynobj
,
8043 struct bfd_link_info
*info
)
8045 /* We need to create .got section. */
8046 if (!aarch64_elf_create_got_section (dynobj
, info
))
8049 return _bfd_elf_create_dynamic_sections (dynobj
, info
);
8053 /* Allocate space in .plt, .got and associated reloc sections for
8057 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
8059 struct bfd_link_info
*info
;
8060 struct elf_aarch64_link_hash_table
*htab
;
8061 struct elf_aarch64_link_hash_entry
*eh
;
8062 struct elf_dyn_relocs
*p
;
8064 /* An example of a bfd_link_hash_indirect symbol is versioned
8065 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8066 -> __gxx_personality_v0(bfd_link_hash_defined)
8068 There is no need to process bfd_link_hash_indirect symbols here
8069 because we will also be presented with the concrete instance of
8070 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8071 called to copy all relevant data from the generic to the concrete
8073 if (h
->root
.type
== bfd_link_hash_indirect
)
8076 if (h
->root
.type
== bfd_link_hash_warning
)
8077 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8079 info
= (struct bfd_link_info
*) inf
;
8080 htab
= elf_aarch64_hash_table (info
);
8082 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8083 here if it is defined and referenced in a non-shared object. */
8084 if (h
->type
== STT_GNU_IFUNC
8087 else if (htab
->root
.dynamic_sections_created
&& h
->plt
.refcount
> 0)
8089 /* Make sure this symbol is output as a dynamic symbol.
8090 Undefined weak syms won't yet be marked as dynamic. */
8091 if (h
->dynindx
== -1 && !h
->forced_local
)
8093 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8097 if (bfd_link_pic (info
) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
8099 asection
*s
= htab
->root
.splt
;
8101 /* If this is the first .plt entry, make room for the special
8104 s
->size
+= htab
->plt_header_size
;
8106 h
->plt
.offset
= s
->size
;
8108 /* If this symbol is not defined in a regular file, and we are
8109 not generating a shared library, then set the symbol to this
8110 location in the .plt. This is required to make function
8111 pointers compare as equal between the normal executable and
8112 the shared library. */
8113 if (!bfd_link_pic (info
) && !h
->def_regular
)
8115 h
->root
.u
.def
.section
= s
;
8116 h
->root
.u
.def
.value
= h
->plt
.offset
;
8119 /* Make room for this entry. For now we only create the
8120 small model PLT entries. We later need to find a way
8121 of relaxing into these from the large model PLT entries. */
8122 s
->size
+= PLT_SMALL_ENTRY_SIZE
;
8124 /* We also need to make an entry in the .got.plt section, which
8125 will be placed in the .got section by the linker script. */
8126 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
8128 /* We also need to make an entry in the .rela.plt section. */
8129 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8131 /* We need to ensure that all GOT entries that serve the PLT
8132 are consecutive with the special GOT slots [0] [1] and
8133 [2]. Any addtional relocations, such as
8134 R_AARCH64_TLSDESC, must be placed after the PLT related
8135 entries. We abuse the reloc_count such that during
8136 sizing we adjust reloc_count to indicate the number of
8137 PLT related reserved entries. In subsequent phases when
8138 filling in the contents of the reloc entries, PLT related
8139 entries are placed by computing their PLT index (0
8140 .. reloc_count). While other none PLT relocs are placed
8141 at the slot indicated by reloc_count and reloc_count is
8144 htab
->root
.srelplt
->reloc_count
++;
8148 h
->plt
.offset
= (bfd_vma
) - 1;
8154 h
->plt
.offset
= (bfd_vma
) - 1;
8158 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8159 eh
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8161 if (h
->got
.refcount
> 0)
8164 unsigned got_type
= elf_aarch64_hash_entry (h
)->got_type
;
8166 h
->got
.offset
= (bfd_vma
) - 1;
8168 dyn
= htab
->root
.dynamic_sections_created
;
8170 /* Make sure this symbol is output as a dynamic symbol.
8171 Undefined weak syms won't yet be marked as dynamic. */
8172 if (dyn
&& h
->dynindx
== -1 && !h
->forced_local
)
8174 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8178 if (got_type
== GOT_UNKNOWN
)
8181 else if (got_type
== GOT_NORMAL
)
8183 h
->got
.offset
= htab
->root
.sgot
->size
;
8184 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8185 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8186 || h
->root
.type
!= bfd_link_hash_undefweak
)
8187 && (bfd_link_pic (info
)
8188 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
8190 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8196 if (got_type
& GOT_TLSDESC_GD
)
8198 eh
->tlsdesc_got_jump_table_offset
=
8199 (htab
->root
.sgotplt
->size
8200 - aarch64_compute_jump_table_size (htab
));
8201 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8202 h
->got
.offset
= (bfd_vma
) - 2;
8205 if (got_type
& GOT_TLS_GD
)
8207 h
->got
.offset
= htab
->root
.sgot
->size
;
8208 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8211 if (got_type
& GOT_TLS_IE
)
8213 h
->got
.offset
= htab
->root
.sgot
->size
;
8214 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8217 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
8218 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8219 || h
->root
.type
!= bfd_link_hash_undefweak
)
8220 && (bfd_link_pic (info
)
8222 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
8224 if (got_type
& GOT_TLSDESC_GD
)
8226 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8227 /* Note reloc_count not incremented here! We have
8228 already adjusted reloc_count for this relocation
8231 /* TLSDESC PLT is now needed, but not yet determined. */
8232 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
8235 if (got_type
& GOT_TLS_GD
)
8236 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8238 if (got_type
& GOT_TLS_IE
)
8239 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8245 h
->got
.offset
= (bfd_vma
) - 1;
8248 if (eh
->dyn_relocs
== NULL
)
8251 /* In the shared -Bsymbolic case, discard space allocated for
8252 dynamic pc-relative relocs against symbols which turn out to be
8253 defined in regular objects. For the normal shared case, discard
8254 space for pc-relative relocs that have become local due to symbol
8255 visibility changes. */
8257 if (bfd_link_pic (info
))
8259 /* Relocs that use pc_count are those that appear on a call
8260 insn, or certain REL relocs that can generated via assembly.
8261 We want calls to protected symbols to resolve directly to the
8262 function rather than going via the plt. If people want
8263 function pointer comparisons to work as expected then they
8264 should avoid writing weird assembly. */
8265 if (SYMBOL_CALLS_LOCAL (info
, h
))
8267 struct elf_dyn_relocs
**pp
;
8269 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
;)
8271 p
->count
-= p
->pc_count
;
8280 /* Also discard relocs on undefined weak syms with non-default
8282 if (eh
->dyn_relocs
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
8284 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
8285 eh
->dyn_relocs
= NULL
;
8287 /* Make sure undefined weak symbols are output as a dynamic
8289 else if (h
->dynindx
== -1
8291 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8296 else if (ELIMINATE_COPY_RELOCS
)
8298 /* For the non-shared case, discard space for relocs against
8299 symbols which turn out to need copy relocs or are not
8305 || (htab
->root
.dynamic_sections_created
8306 && (h
->root
.type
== bfd_link_hash_undefweak
8307 || h
->root
.type
== bfd_link_hash_undefined
))))
8309 /* Make sure this symbol is output as a dynamic symbol.
8310 Undefined weak syms won't yet be marked as dynamic. */
8311 if (h
->dynindx
== -1
8313 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8316 /* If that succeeded, we know we'll be keeping all the
8318 if (h
->dynindx
!= -1)
8322 eh
->dyn_relocs
= NULL
;
8327 /* Finally, allocate space. */
8328 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
8332 sreloc
= elf_section_data (p
->sec
)->sreloc
;
8334 BFD_ASSERT (sreloc
!= NULL
);
8336 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
8342 /* Allocate space in .plt, .got and associated reloc sections for
8343 ifunc dynamic relocs. */
8346 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
8349 struct bfd_link_info
*info
;
8350 struct elf_aarch64_link_hash_table
*htab
;
8351 struct elf_aarch64_link_hash_entry
*eh
;
8353 /* An example of a bfd_link_hash_indirect symbol is versioned
8354 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8355 -> __gxx_personality_v0(bfd_link_hash_defined)
8357 There is no need to process bfd_link_hash_indirect symbols here
8358 because we will also be presented with the concrete instance of
8359 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8360 called to copy all relevant data from the generic to the concrete
8362 if (h
->root
.type
== bfd_link_hash_indirect
)
8365 if (h
->root
.type
== bfd_link_hash_warning
)
8366 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8368 info
= (struct bfd_link_info
*) inf
;
8369 htab
= elf_aarch64_hash_table (info
);
8371 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8373 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8374 here if it is defined and referenced in a non-shared object. */
8375 if (h
->type
== STT_GNU_IFUNC
8377 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
8380 htab
->plt_entry_size
,
8381 htab
->plt_header_size
,
8387 /* Allocate space in .plt, .got and associated reloc sections for
8388 local dynamic relocs. */
8391 elfNN_aarch64_allocate_local_dynrelocs (void **slot
, void *inf
)
8393 struct elf_link_hash_entry
*h
8394 = (struct elf_link_hash_entry
*) *slot
;
8396 if (h
->type
!= STT_GNU_IFUNC
8400 || h
->root
.type
!= bfd_link_hash_defined
)
8403 return elfNN_aarch64_allocate_dynrelocs (h
, inf
);
8406 /* Allocate space in .plt, .got and associated reloc sections for
8407 local ifunc dynamic relocs. */
8410 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
8412 struct elf_link_hash_entry
*h
8413 = (struct elf_link_hash_entry
*) *slot
;
8415 if (h
->type
!= STT_GNU_IFUNC
8419 || h
->root
.type
!= bfd_link_hash_defined
)
8422 return elfNN_aarch64_allocate_ifunc_dynrelocs (h
, inf
);
8425 /* Find any dynamic relocs that apply to read-only sections. */
8428 aarch64_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
8430 struct elf_aarch64_link_hash_entry
* eh
;
8431 struct elf_dyn_relocs
* p
;
8433 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8434 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
8436 asection
*s
= p
->sec
;
8438 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
8440 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
8442 info
->flags
|= DF_TEXTREL
;
8444 /* Not an error, just cut short the traversal. */
8451 /* This is the most important function of all . Innocuosly named
8455 elfNN_aarch64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
8456 struct bfd_link_info
*info
)
8458 struct elf_aarch64_link_hash_table
*htab
;
8464 htab
= elf_aarch64_hash_table ((info
));
8465 dynobj
= htab
->root
.dynobj
;
8467 BFD_ASSERT (dynobj
!= NULL
);
8469 if (htab
->root
.dynamic_sections_created
)
8471 if (bfd_link_executable (info
) && !info
->nointerp
)
8473 s
= bfd_get_linker_section (dynobj
, ".interp");
8476 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
8477 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
8481 /* Set up .got offsets for local syms, and space for local dynamic
8483 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8485 struct elf_aarch64_local_symbol
*locals
= NULL
;
8486 Elf_Internal_Shdr
*symtab_hdr
;
8490 if (!is_aarch64_elf (ibfd
))
8493 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
8495 struct elf_dyn_relocs
*p
;
8497 for (p
= (struct elf_dyn_relocs
*)
8498 (elf_section_data (s
)->local_dynrel
); p
!= NULL
; p
= p
->next
)
8500 if (!bfd_is_abs_section (p
->sec
)
8501 && bfd_is_abs_section (p
->sec
->output_section
))
8503 /* Input section has been discarded, either because
8504 it is a copy of a linkonce section or due to
8505 linker script /DISCARD/, so we'll be discarding
8508 else if (p
->count
!= 0)
8510 srel
= elf_section_data (p
->sec
)->sreloc
;
8511 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
8512 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
8513 info
->flags
|= DF_TEXTREL
;
8518 locals
= elf_aarch64_locals (ibfd
);
8522 symtab_hdr
= &elf_symtab_hdr (ibfd
);
8523 srel
= htab
->root
.srelgot
;
8524 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
8526 locals
[i
].got_offset
= (bfd_vma
) - 1;
8527 locals
[i
].tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8528 if (locals
[i
].got_refcount
> 0)
8530 unsigned got_type
= locals
[i
].got_type
;
8531 if (got_type
& GOT_TLSDESC_GD
)
8533 locals
[i
].tlsdesc_got_jump_table_offset
=
8534 (htab
->root
.sgotplt
->size
8535 - aarch64_compute_jump_table_size (htab
));
8536 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8537 locals
[i
].got_offset
= (bfd_vma
) - 2;
8540 if (got_type
& GOT_TLS_GD
)
8542 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8543 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8546 if (got_type
& GOT_TLS_IE
8547 || got_type
& GOT_NORMAL
)
8549 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8550 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8553 if (got_type
== GOT_UNKNOWN
)
8557 if (bfd_link_pic (info
))
8559 if (got_type
& GOT_TLSDESC_GD
)
8561 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8562 /* Note RELOC_COUNT not incremented here! */
8563 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
8566 if (got_type
& GOT_TLS_GD
)
8567 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8569 if (got_type
& GOT_TLS_IE
8570 || got_type
& GOT_NORMAL
)
8571 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8576 locals
[i
].got_refcount
= (bfd_vma
) - 1;
8582 /* Allocate global sym .plt and .got entries, and space for global
8583 sym dynamic relocs. */
8584 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_dynrelocs
,
8587 /* Allocate global ifunc sym .plt and .got entries, and space for global
8588 ifunc sym dynamic relocs. */
8589 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_ifunc_dynrelocs
,
8592 /* Allocate .plt and .got entries, and space for local symbols. */
8593 htab_traverse (htab
->loc_hash_table
,
8594 elfNN_aarch64_allocate_local_dynrelocs
,
8597 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8598 htab_traverse (htab
->loc_hash_table
,
8599 elfNN_aarch64_allocate_local_ifunc_dynrelocs
,
8602 /* For every jump slot reserved in the sgotplt, reloc_count is
8603 incremented. However, when we reserve space for TLS descriptors,
8604 it's not incremented, so in order to compute the space reserved
8605 for them, it suffices to multiply the reloc count by the jump
8608 if (htab
->root
.srelplt
)
8609 htab
->sgotplt_jump_table_size
= aarch64_compute_jump_table_size (htab
);
8611 if (htab
->tlsdesc_plt
)
8613 if (htab
->root
.splt
->size
== 0)
8614 htab
->root
.splt
->size
+= PLT_ENTRY_SIZE
;
8616 htab
->tlsdesc_plt
= htab
->root
.splt
->size
;
8617 htab
->root
.splt
->size
+= PLT_TLSDESC_ENTRY_SIZE
;
8619 /* If we're not using lazy TLS relocations, don't generate the
8620 GOT entry required. */
8621 if (!(info
->flags
& DF_BIND_NOW
))
8623 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
8624 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8628 /* Init mapping symbols information to use later to distingush between
8629 code and data while scanning for errata. */
8630 if (htab
->fix_erratum_835769
|| htab
->fix_erratum_843419
)
8631 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8633 if (!is_aarch64_elf (ibfd
))
8635 bfd_elfNN_aarch64_init_maps (ibfd
);
8638 /* We now have determined the sizes of the various dynamic sections.
8639 Allocate memory for them. */
8641 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
8643 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
8646 if (s
== htab
->root
.splt
8647 || s
== htab
->root
.sgot
8648 || s
== htab
->root
.sgotplt
8649 || s
== htab
->root
.iplt
8650 || s
== htab
->root
.igotplt
8651 || s
== htab
->root
.sdynbss
8652 || s
== htab
->root
.sdynrelro
)
8654 /* Strip this section if we don't need it; see the
8657 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
8659 if (s
->size
!= 0 && s
!= htab
->root
.srelplt
)
8662 /* We use the reloc_count field as a counter if we need
8663 to copy relocs into the output file. */
8664 if (s
!= htab
->root
.srelplt
)
8669 /* It's not one of our sections, so don't allocate space. */
8675 /* If we don't need this section, strip it from the
8676 output file. This is mostly to handle .rela.bss and
8677 .rela.plt. We must create both sections in
8678 create_dynamic_sections, because they must be created
8679 before the linker maps input sections to output
8680 sections. The linker does that before
8681 adjust_dynamic_symbol is called, and it is that
8682 function which decides whether anything needs to go
8683 into these sections. */
8684 s
->flags
|= SEC_EXCLUDE
;
8688 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
8691 /* Allocate memory for the section contents. We use bfd_zalloc
8692 here in case unused entries are not reclaimed before the
8693 section's contents are written out. This should not happen,
8694 but this way if it does, we get a R_AARCH64_NONE reloc instead
8696 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
8697 if (s
->contents
== NULL
)
8701 if (htab
->root
.dynamic_sections_created
)
8703 /* Add some entries to the .dynamic section. We fill in the
8704 values later, in elfNN_aarch64_finish_dynamic_sections, but we
8705 must add the entries now so that we get the correct size for
8706 the .dynamic section. The DT_DEBUG entry is filled in by the
8707 dynamic linker and used by the debugger. */
8708 #define add_dynamic_entry(TAG, VAL) \
8709 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8711 if (bfd_link_executable (info
))
8713 if (!add_dynamic_entry (DT_DEBUG
, 0))
8717 if (htab
->root
.splt
->size
!= 0)
8719 if (!add_dynamic_entry (DT_PLTGOT
, 0)
8720 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
8721 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
8722 || !add_dynamic_entry (DT_JMPREL
, 0))
8725 if (htab
->tlsdesc_plt
8726 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
8727 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
8733 if (!add_dynamic_entry (DT_RELA
, 0)
8734 || !add_dynamic_entry (DT_RELASZ
, 0)
8735 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
8738 /* If any dynamic relocs apply to a read-only section,
8739 then we need a DT_TEXTREL entry. */
8740 if ((info
->flags
& DF_TEXTREL
) == 0)
8741 elf_link_hash_traverse (& htab
->root
, aarch64_readonly_dynrelocs
,
8744 if ((info
->flags
& DF_TEXTREL
) != 0)
8746 if (!add_dynamic_entry (DT_TEXTREL
, 0))
8751 #undef add_dynamic_entry
8757 elf_aarch64_update_plt_entry (bfd
*output_bfd
,
8758 bfd_reloc_code_real_type r_type
,
8759 bfd_byte
*plt_entry
, bfd_vma value
)
8761 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (r_type
);
8763 _bfd_aarch64_elf_put_addend (output_bfd
, plt_entry
, r_type
, howto
, value
);
8767 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry
*h
,
8768 struct elf_aarch64_link_hash_table
8769 *htab
, bfd
*output_bfd
,
8770 struct bfd_link_info
*info
)
8772 bfd_byte
*plt_entry
;
8775 bfd_vma gotplt_entry_address
;
8776 bfd_vma plt_entry_address
;
8777 Elf_Internal_Rela rela
;
8779 asection
*plt
, *gotplt
, *relplt
;
8781 /* When building a static executable, use .iplt, .igot.plt and
8782 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8783 if (htab
->root
.splt
!= NULL
)
8785 plt
= htab
->root
.splt
;
8786 gotplt
= htab
->root
.sgotplt
;
8787 relplt
= htab
->root
.srelplt
;
8791 plt
= htab
->root
.iplt
;
8792 gotplt
= htab
->root
.igotplt
;
8793 relplt
= htab
->root
.irelplt
;
8796 /* Get the index in the procedure linkage table which
8797 corresponds to this symbol. This is the index of this symbol
8798 in all the symbols for which we are making plt entries. The
8799 first entry in the procedure linkage table is reserved.
8801 Get the offset into the .got table of the entry that
8802 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
8803 bytes. The first three are reserved for the dynamic linker.
8805 For static executables, we don't reserve anything. */
8807 if (plt
== htab
->root
.splt
)
8809 plt_index
= (h
->plt
.offset
- htab
->plt_header_size
) / htab
->plt_entry_size
;
8810 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
8814 plt_index
= h
->plt
.offset
/ htab
->plt_entry_size
;
8815 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
8818 plt_entry
= plt
->contents
+ h
->plt
.offset
;
8819 plt_entry_address
= plt
->output_section
->vma
8820 + plt
->output_offset
+ h
->plt
.offset
;
8821 gotplt_entry_address
= gotplt
->output_section
->vma
+
8822 gotplt
->output_offset
+ got_offset
;
8824 /* Copy in the boiler-plate for the PLTn entry. */
8825 memcpy (plt_entry
, elfNN_aarch64_small_plt_entry
, PLT_SMALL_ENTRY_SIZE
);
8827 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8828 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8829 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
8831 PG (gotplt_entry_address
) -
8832 PG (plt_entry_address
));
8834 /* Fill in the lo12 bits for the load from the pltgot. */
8835 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
8837 PG_OFFSET (gotplt_entry_address
));
8839 /* Fill in the lo12 bits for the add from the pltgot entry. */
8840 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
8842 PG_OFFSET (gotplt_entry_address
));
8844 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8845 bfd_put_NN (output_bfd
,
8846 plt
->output_section
->vma
+ plt
->output_offset
,
8847 gotplt
->contents
+ got_offset
);
8849 rela
.r_offset
= gotplt_entry_address
;
8851 if (h
->dynindx
== -1
8852 || ((bfd_link_executable (info
)
8853 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
8855 && h
->type
== STT_GNU_IFUNC
))
8857 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8858 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8859 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
8860 rela
.r_addend
= (h
->root
.u
.def
.value
8861 + h
->root
.u
.def
.section
->output_section
->vma
8862 + h
->root
.u
.def
.section
->output_offset
);
8866 /* Fill in the entry in the .rela.plt section. */
8867 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (JUMP_SLOT
));
8871 /* Compute the relocation entry to used based on PLT index and do
8872 not adjust reloc_count. The reloc_count has already been adjusted
8873 to account for this entry. */
8874 loc
= relplt
->contents
+ plt_index
* RELOC_SIZE (htab
);
8875 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
8878 /* Size sections even though they're not dynamic. We use it to setup
8879 _TLS_MODULE_BASE_, if needed. */
8882 elfNN_aarch64_always_size_sections (bfd
*output_bfd
,
8883 struct bfd_link_info
*info
)
8887 if (bfd_link_relocatable (info
))
8890 tls_sec
= elf_hash_table (info
)->tls_sec
;
8894 struct elf_link_hash_entry
*tlsbase
;
8896 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
8897 "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
8901 struct bfd_link_hash_entry
*h
= NULL
;
8902 const struct elf_backend_data
*bed
=
8903 get_elf_backend_data (output_bfd
);
8905 if (!(_bfd_generic_link_add_one_symbol
8906 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
8907 tls_sec
, 0, NULL
, FALSE
, bed
->collect
, &h
)))
8910 tlsbase
->type
= STT_TLS
;
8911 tlsbase
= (struct elf_link_hash_entry
*) h
;
8912 tlsbase
->def_regular
= 1;
8913 tlsbase
->other
= STV_HIDDEN
;
8914 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
8921 /* Finish up dynamic symbol handling. We set the contents of various
8922 dynamic sections here. */
8925 elfNN_aarch64_finish_dynamic_symbol (bfd
*output_bfd
,
8926 struct bfd_link_info
*info
,
8927 struct elf_link_hash_entry
*h
,
8928 Elf_Internal_Sym
*sym
)
8930 struct elf_aarch64_link_hash_table
*htab
;
8931 htab
= elf_aarch64_hash_table (info
);
8933 if (h
->plt
.offset
!= (bfd_vma
) - 1)
8935 asection
*plt
, *gotplt
, *relplt
;
8937 /* This symbol has an entry in the procedure linkage table. Set
8940 /* When building a static executable, use .iplt, .igot.plt and
8941 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8942 if (htab
->root
.splt
!= NULL
)
8944 plt
= htab
->root
.splt
;
8945 gotplt
= htab
->root
.sgotplt
;
8946 relplt
= htab
->root
.srelplt
;
8950 plt
= htab
->root
.iplt
;
8951 gotplt
= htab
->root
.igotplt
;
8952 relplt
= htab
->root
.irelplt
;
8955 /* This symbol has an entry in the procedure linkage table. Set
8957 if ((h
->dynindx
== -1
8958 && !((h
->forced_local
|| bfd_link_executable (info
))
8960 && h
->type
== STT_GNU_IFUNC
))
8966 elfNN_aarch64_create_small_pltn_entry (h
, htab
, output_bfd
, info
);
8967 if (!h
->def_regular
)
8969 /* Mark the symbol as undefined, rather than as defined in
8970 the .plt section. */
8971 sym
->st_shndx
= SHN_UNDEF
;
8972 /* If the symbol is weak we need to clear the value.
8973 Otherwise, the PLT entry would provide a definition for
8974 the symbol even if the symbol wasn't defined anywhere,
8975 and so the symbol would never be NULL. Leave the value if
8976 there were any relocations where pointer equality matters
8977 (this is a clue for the dynamic linker, to make function
8978 pointer comparisons work between an application and shared
8980 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
8985 if (h
->got
.offset
!= (bfd_vma
) - 1
8986 && elf_aarch64_hash_entry (h
)->got_type
== GOT_NORMAL
)
8988 Elf_Internal_Rela rela
;
8991 /* This symbol has an entry in the global offset table. Set it
8993 if (htab
->root
.sgot
== NULL
|| htab
->root
.srelgot
== NULL
)
8996 rela
.r_offset
= (htab
->root
.sgot
->output_section
->vma
8997 + htab
->root
.sgot
->output_offset
8998 + (h
->got
.offset
& ~(bfd_vma
) 1));
9001 && h
->type
== STT_GNU_IFUNC
)
9003 if (bfd_link_pic (info
))
9005 /* Generate R_AARCH64_GLOB_DAT. */
9012 if (!h
->pointer_equality_needed
)
9015 /* For non-shared object, we can't use .got.plt, which
9016 contains the real function address if we need pointer
9017 equality. We load the GOT entry with the PLT entry. */
9018 plt
= htab
->root
.splt
? htab
->root
.splt
: htab
->root
.iplt
;
9019 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
9020 + plt
->output_offset
9022 htab
->root
.sgot
->contents
9023 + (h
->got
.offset
& ~(bfd_vma
) 1));
9027 else if (bfd_link_pic (info
) && SYMBOL_REFERENCES_LOCAL (info
, h
))
9029 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
9032 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
9033 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
9034 rela
.r_addend
= (h
->root
.u
.def
.value
9035 + h
->root
.u
.def
.section
->output_section
->vma
9036 + h
->root
.u
.def
.section
->output_offset
);
9041 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
9042 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9043 htab
->root
.sgot
->contents
+ h
->got
.offset
);
9044 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (GLOB_DAT
));
9048 loc
= htab
->root
.srelgot
->contents
;
9049 loc
+= htab
->root
.srelgot
->reloc_count
++ * RELOC_SIZE (htab
);
9050 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9055 Elf_Internal_Rela rela
;
9059 /* This symbol needs a copy reloc. Set it up. */
9060 if (h
->dynindx
== -1
9061 || (h
->root
.type
!= bfd_link_hash_defined
9062 && h
->root
.type
!= bfd_link_hash_defweak
)
9063 || htab
->root
.srelbss
== NULL
)
9066 rela
.r_offset
= (h
->root
.u
.def
.value
9067 + h
->root
.u
.def
.section
->output_section
->vma
9068 + h
->root
.u
.def
.section
->output_offset
);
9069 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (COPY
));
9071 if (h
->root
.u
.def
.section
== htab
->root
.sdynrelro
)
9072 s
= htab
->root
.sreldynrelro
;
9074 s
= htab
->root
.srelbss
;
9075 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
9076 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9079 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
9080 be NULL for local symbols. */
9082 && (h
== elf_hash_table (info
)->hdynamic
9083 || h
== elf_hash_table (info
)->hgot
))
9084 sym
->st_shndx
= SHN_ABS
;
9089 /* Finish up local dynamic symbol handling. We set the contents of
9090 various dynamic sections here. */
9093 elfNN_aarch64_finish_local_dynamic_symbol (void **slot
, void *inf
)
9095 struct elf_link_hash_entry
*h
9096 = (struct elf_link_hash_entry
*) *slot
;
9097 struct bfd_link_info
*info
9098 = (struct bfd_link_info
*) inf
;
9100 return elfNN_aarch64_finish_dynamic_symbol (info
->output_bfd
,
9105 elfNN_aarch64_init_small_plt0_entry (bfd
*output_bfd ATTRIBUTE_UNUSED
,
9106 struct elf_aarch64_link_hash_table
9109 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
9110 small and large plts and at the minute just generates
9113 /* PLT0 of the small PLT looks like this in ELF64 -
9114 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
9115 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
9116 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
9118 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
9119 // GOTPLT entry for this.
9121 PLT0 will be slightly different in ELF32 due to different got entry
9123 bfd_vma plt_got_2nd_ent
; /* Address of GOT[2]. */
9127 memcpy (htab
->root
.splt
->contents
, elfNN_aarch64_small_plt0_entry
,
9129 elf_section_data (htab
->root
.splt
->output_section
)->this_hdr
.sh_entsize
=
9132 plt_got_2nd_ent
= (htab
->root
.sgotplt
->output_section
->vma
9133 + htab
->root
.sgotplt
->output_offset
9134 + GOT_ENTRY_SIZE
* 2);
9136 plt_base
= htab
->root
.splt
->output_section
->vma
+
9137 htab
->root
.splt
->output_offset
;
9139 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9140 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9141 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9142 htab
->root
.splt
->contents
+ 4,
9143 PG (plt_got_2nd_ent
) - PG (plt_base
+ 4));
9145 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
9146 htab
->root
.splt
->contents
+ 8,
9147 PG_OFFSET (plt_got_2nd_ent
));
9149 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
9150 htab
->root
.splt
->contents
+ 12,
9151 PG_OFFSET (plt_got_2nd_ent
));
9155 elfNN_aarch64_finish_dynamic_sections (bfd
*output_bfd
,
9156 struct bfd_link_info
*info
)
9158 struct elf_aarch64_link_hash_table
*htab
;
9162 htab
= elf_aarch64_hash_table (info
);
9163 dynobj
= htab
->root
.dynobj
;
9164 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
9166 if (htab
->root
.dynamic_sections_created
)
9168 ElfNN_External_Dyn
*dyncon
, *dynconend
;
9170 if (sdyn
== NULL
|| htab
->root
.sgot
== NULL
)
9173 dyncon
= (ElfNN_External_Dyn
*) sdyn
->contents
;
9174 dynconend
= (ElfNN_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
9175 for (; dyncon
< dynconend
; dyncon
++)
9177 Elf_Internal_Dyn dyn
;
9180 bfd_elfNN_swap_dyn_in (dynobj
, dyncon
, &dyn
);
9188 s
= htab
->root
.sgotplt
;
9189 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9193 s
= htab
->root
.srelplt
;
9194 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9198 s
= htab
->root
.srelplt
;
9199 dyn
.d_un
.d_val
= s
->size
;
9202 case DT_TLSDESC_PLT
:
9203 s
= htab
->root
.splt
;
9204 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9205 + htab
->tlsdesc_plt
;
9208 case DT_TLSDESC_GOT
:
9209 s
= htab
->root
.sgot
;
9210 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9211 + htab
->dt_tlsdesc_got
;
9215 bfd_elfNN_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
9220 /* Fill in the special first entry in the procedure linkage table. */
9221 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
9223 elfNN_aarch64_init_small_plt0_entry (output_bfd
, htab
);
9225 elf_section_data (htab
->root
.splt
->output_section
)->
9226 this_hdr
.sh_entsize
= htab
->plt_entry_size
;
9229 if (htab
->tlsdesc_plt
)
9231 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9232 htab
->root
.sgot
->contents
+ htab
->dt_tlsdesc_got
);
9234 memcpy (htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
,
9235 elfNN_aarch64_tlsdesc_small_plt_entry
,
9236 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry
));
9239 bfd_vma adrp1_addr
=
9240 htab
->root
.splt
->output_section
->vma
9241 + htab
->root
.splt
->output_offset
+ htab
->tlsdesc_plt
+ 4;
9243 bfd_vma adrp2_addr
= adrp1_addr
+ 4;
9246 htab
->root
.sgot
->output_section
->vma
9247 + htab
->root
.sgot
->output_offset
;
9249 bfd_vma pltgot_addr
=
9250 htab
->root
.sgotplt
->output_section
->vma
9251 + htab
->root
.sgotplt
->output_offset
;
9253 bfd_vma dt_tlsdesc_got
= got_addr
+ htab
->dt_tlsdesc_got
;
9255 bfd_byte
*plt_entry
=
9256 htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
;
9258 /* adrp x2, DT_TLSDESC_GOT */
9259 elf_aarch64_update_plt_entry (output_bfd
,
9260 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9262 (PG (dt_tlsdesc_got
)
9263 - PG (adrp1_addr
)));
9266 elf_aarch64_update_plt_entry (output_bfd
,
9267 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9270 - PG (adrp2_addr
)));
9272 /* ldr x2, [x2, #0] */
9273 elf_aarch64_update_plt_entry (output_bfd
,
9274 BFD_RELOC_AARCH64_LDSTNN_LO12
,
9276 PG_OFFSET (dt_tlsdesc_got
));
9279 elf_aarch64_update_plt_entry (output_bfd
,
9280 BFD_RELOC_AARCH64_ADD_LO12
,
9282 PG_OFFSET (pltgot_addr
));
9287 if (htab
->root
.sgotplt
)
9289 if (bfd_is_abs_section (htab
->root
.sgotplt
->output_section
))
9292 (_("discarded output section: `%A'"), htab
->root
.sgotplt
);
9296 /* Fill in the first three entries in the global offset table. */
9297 if (htab
->root
.sgotplt
->size
> 0)
9299 bfd_put_NN (output_bfd
, (bfd_vma
) 0, htab
->root
.sgotplt
->contents
);
9301 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
9302 bfd_put_NN (output_bfd
,
9304 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
9305 bfd_put_NN (output_bfd
,
9307 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
* 2);
9310 if (htab
->root
.sgot
)
9312 if (htab
->root
.sgot
->size
> 0)
9315 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0;
9316 bfd_put_NN (output_bfd
, addr
, htab
->root
.sgot
->contents
);
9320 elf_section_data (htab
->root
.sgotplt
->output_section
)->
9321 this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
9324 if (htab
->root
.sgot
&& htab
->root
.sgot
->size
> 0)
9325 elf_section_data (htab
->root
.sgot
->output_section
)->this_hdr
.sh_entsize
9328 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
9329 htab_traverse (htab
->loc_hash_table
,
9330 elfNN_aarch64_finish_local_dynamic_symbol
,
9336 /* Return address for Ith PLT stub in section PLT, for relocation REL
9337 or (bfd_vma) -1 if it should not be included. */
9340 elfNN_aarch64_plt_sym_val (bfd_vma i
, const asection
*plt
,
9341 const arelent
*rel ATTRIBUTE_UNUSED
)
9343 return plt
->vma
+ PLT_ENTRY_SIZE
+ i
* PLT_SMALL_ENTRY_SIZE
;
9346 /* Returns TRUE if NAME is an AArch64 mapping symbol.
9347 The ARM ELF standard defines $x (for A64 code) and $d (for data).
9348 It also allows a period initiated suffix to be added to the symbol, ie:
9349 "$[adtx]\.[:sym_char]+". */
9352 is_aarch64_mapping_symbol (const char * name
)
9354 return name
!= NULL
/* Paranoia. */
9355 && name
[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
9356 the mapping symbols could have acquired a prefix.
9357 We do not support this here, since such symbols no
9358 longer conform to the ARM ELF ABI. */
9359 && (name
[1] == 'd' || name
[1] == 'x')
9360 && (name
[2] == 0 || name
[2] == '.');
9361 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
9362 any characters that follow the period are legal characters for the body
9363 of a symbol's name. For now we just assume that this is the case. */
9366 /* Make sure that mapping symbols in object files are not removed via the
9367 "strip --strip-unneeded" tool. These symbols might needed in order to
9368 correctly generate linked files. Once an object file has been linked,
9369 it should be safe to remove them. */
9372 elfNN_aarch64_backend_symbol_processing (bfd
*abfd
, asymbol
*sym
)
9374 if (((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0)
9375 && sym
->section
!= bfd_abs_section_ptr
9376 && is_aarch64_mapping_symbol (sym
->name
))
9377 sym
->flags
|= BSF_KEEP
;
9381 /* We use this so we can override certain functions
9382 (though currently we don't). */
9384 const struct elf_size_info elfNN_aarch64_size_info
=
9386 sizeof (ElfNN_External_Ehdr
),
9387 sizeof (ElfNN_External_Phdr
),
9388 sizeof (ElfNN_External_Shdr
),
9389 sizeof (ElfNN_External_Rel
),
9390 sizeof (ElfNN_External_Rela
),
9391 sizeof (ElfNN_External_Sym
),
9392 sizeof (ElfNN_External_Dyn
),
9393 sizeof (Elf_External_Note
),
9394 4, /* Hash table entry size. */
9395 1, /* Internal relocs per external relocs. */
9396 ARCH_SIZE
, /* Arch size. */
9397 LOG_FILE_ALIGN
, /* Log_file_align. */
9398 ELFCLASSNN
, EV_CURRENT
,
9399 bfd_elfNN_write_out_phdrs
,
9400 bfd_elfNN_write_shdrs_and_ehdr
,
9401 bfd_elfNN_checksum_contents
,
9402 bfd_elfNN_write_relocs
,
9403 bfd_elfNN_swap_symbol_in
,
9404 bfd_elfNN_swap_symbol_out
,
9405 bfd_elfNN_slurp_reloc_table
,
9406 bfd_elfNN_slurp_symbol_table
,
9407 bfd_elfNN_swap_dyn_in
,
9408 bfd_elfNN_swap_dyn_out
,
9409 bfd_elfNN_swap_reloc_in
,
9410 bfd_elfNN_swap_reloc_out
,
9411 bfd_elfNN_swap_reloca_in
,
9412 bfd_elfNN_swap_reloca_out
9415 #define ELF_ARCH bfd_arch_aarch64
9416 #define ELF_MACHINE_CODE EM_AARCH64
9417 #define ELF_MAXPAGESIZE 0x10000
9418 #define ELF_MINPAGESIZE 0x1000
9419 #define ELF_COMMONPAGESIZE 0x1000
9421 #define bfd_elfNN_close_and_cleanup \
9422 elfNN_aarch64_close_and_cleanup
9424 #define bfd_elfNN_bfd_free_cached_info \
9425 elfNN_aarch64_bfd_free_cached_info
9427 #define bfd_elfNN_bfd_is_target_special_symbol \
9428 elfNN_aarch64_is_target_special_symbol
9430 #define bfd_elfNN_bfd_link_hash_table_create \
9431 elfNN_aarch64_link_hash_table_create
9433 #define bfd_elfNN_bfd_merge_private_bfd_data \
9434 elfNN_aarch64_merge_private_bfd_data
9436 #define bfd_elfNN_bfd_print_private_bfd_data \
9437 elfNN_aarch64_print_private_bfd_data
9439 #define bfd_elfNN_bfd_reloc_type_lookup \
9440 elfNN_aarch64_reloc_type_lookup
9442 #define bfd_elfNN_bfd_reloc_name_lookup \
9443 elfNN_aarch64_reloc_name_lookup
9445 #define bfd_elfNN_bfd_set_private_flags \
9446 elfNN_aarch64_set_private_flags
9448 #define bfd_elfNN_find_inliner_info \
9449 elfNN_aarch64_find_inliner_info
9451 #define bfd_elfNN_find_nearest_line \
9452 elfNN_aarch64_find_nearest_line
9454 #define bfd_elfNN_mkobject \
9455 elfNN_aarch64_mkobject
9457 #define bfd_elfNN_new_section_hook \
9458 elfNN_aarch64_new_section_hook
9460 #define elf_backend_adjust_dynamic_symbol \
9461 elfNN_aarch64_adjust_dynamic_symbol
9463 #define elf_backend_always_size_sections \
9464 elfNN_aarch64_always_size_sections
9466 #define elf_backend_check_relocs \
9467 elfNN_aarch64_check_relocs
9469 #define elf_backend_copy_indirect_symbol \
9470 elfNN_aarch64_copy_indirect_symbol
9472 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
9473 to them in our hash. */
9474 #define elf_backend_create_dynamic_sections \
9475 elfNN_aarch64_create_dynamic_sections
9477 #define elf_backend_init_index_section \
9478 _bfd_elf_init_2_index_sections
9480 #define elf_backend_finish_dynamic_sections \
9481 elfNN_aarch64_finish_dynamic_sections
9483 #define elf_backend_finish_dynamic_symbol \
9484 elfNN_aarch64_finish_dynamic_symbol
9486 #define elf_backend_gc_sweep_hook \
9487 elfNN_aarch64_gc_sweep_hook
9489 #define elf_backend_object_p \
9490 elfNN_aarch64_object_p
9492 #define elf_backend_output_arch_local_syms \
9493 elfNN_aarch64_output_arch_local_syms
9495 #define elf_backend_plt_sym_val \
9496 elfNN_aarch64_plt_sym_val
9498 #define elf_backend_post_process_headers \
9499 elfNN_aarch64_post_process_headers
9501 #define elf_backend_relocate_section \
9502 elfNN_aarch64_relocate_section
9504 #define elf_backend_reloc_type_class \
9505 elfNN_aarch64_reloc_type_class
9507 #define elf_backend_section_from_shdr \
9508 elfNN_aarch64_section_from_shdr
9510 #define elf_backend_size_dynamic_sections \
9511 elfNN_aarch64_size_dynamic_sections
9513 #define elf_backend_size_info \
9514 elfNN_aarch64_size_info
9516 #define elf_backend_write_section \
9517 elfNN_aarch64_write_section
9519 #define elf_backend_symbol_processing \
9520 elfNN_aarch64_backend_symbol_processing
9522 #define elf_backend_can_refcount 1
9523 #define elf_backend_can_gc_sections 1
9524 #define elf_backend_plt_readonly 1
9525 #define elf_backend_want_got_plt 1
9526 #define elf_backend_want_plt_sym 0
9527 #define elf_backend_want_dynrelro 1
9528 #define elf_backend_may_use_rel_p 0
9529 #define elf_backend_may_use_rela_p 1
9530 #define elf_backend_default_use_rela_p 1
9531 #define elf_backend_rela_normal 1
9532 #define elf_backend_dtrel_excludes_plt 1
9533 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
9534 #define elf_backend_default_execstack 0
9535 #define elf_backend_extern_protected_data 1
9536 #define elf_backend_hash_symbol elf_aarch64_hash_symbol
9538 #undef elf_backend_obj_attrs_section
9539 #define elf_backend_obj_attrs_section ".ARM.attributes"
9541 #include "elfNN-target.h"
9543 /* CloudABI support. */
9545 #undef TARGET_LITTLE_SYM
9546 #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec
9547 #undef TARGET_LITTLE_NAME
9548 #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi"
9549 #undef TARGET_BIG_SYM
9550 #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec
9551 #undef TARGET_BIG_NAME
9552 #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi"
9555 #define ELF_OSABI ELFOSABI_CLOUDABI
9558 #define elfNN_bed elfNN_aarch64_cloudabi_bed
9560 #include "elfNN-target.h"