1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2021 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"
144 #include "objalloc.h"
145 #include "elf/aarch64.h"
146 #include "elfxx-aarch64.h"
147 #include "cpu-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_LDST16_TPREL_LO12 \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12 \
207 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC \
208 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12 \
209 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC \
210 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12 \
211 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC \
212 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
213 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
214 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
215 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
216 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
217 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
218 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
219 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
220 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
222 #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \
223 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
224 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
225 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
226 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
227 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
228 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
229 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \
230 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
231 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
232 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
233 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
234 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
235 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
236 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
237 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
238 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
239 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
240 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
241 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \
242 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
243 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
244 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21)
246 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
247 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
248 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
249 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
250 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
251 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
252 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
253 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
254 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 \
255 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
256 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
257 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
258 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
260 #define ELIMINATE_COPY_RELOCS 1
262 /* Return size of a relocation entry. HTAB is the bfd's
263 elf_aarch64_link_hash_entry. */
264 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
266 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
267 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
268 #define PLT_ENTRY_SIZE (32)
269 #define PLT_SMALL_ENTRY_SIZE (16)
270 #define PLT_TLSDESC_ENTRY_SIZE (32)
271 /* PLT sizes with BTI insn. */
272 #define PLT_BTI_SMALL_ENTRY_SIZE (24)
273 /* PLT sizes with PAC insn. */
274 #define PLT_PAC_SMALL_ENTRY_SIZE (24)
275 /* PLT sizes with BTI and PAC insn. */
276 #define PLT_BTI_PAC_SMALL_ENTRY_SIZE (24)
278 /* Encoding of the nop instruction. */
279 #define INSN_NOP 0xd503201f
281 #define aarch64_compute_jump_table_size(htab) \
282 (((htab)->root.srelplt == NULL) ? 0 \
283 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
285 /* The first entry in a procedure linkage table looks like this
286 if the distance between the PLTGOT and the PLT is < 4GB use
287 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
288 in x16 and needs to work out PLTGOT[1] by using an address of
289 [x16,#-GOT_ENTRY_SIZE]. */
290 static const bfd_byte elfNN_aarch64_small_plt0_entry
[PLT_ENTRY_SIZE
] =
292 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
293 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
295 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
296 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
298 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
299 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
301 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
302 0x1f, 0x20, 0x03, 0xd5, /* nop */
303 0x1f, 0x20, 0x03, 0xd5, /* nop */
304 0x1f, 0x20, 0x03, 0xd5, /* nop */
307 static const bfd_byte elfNN_aarch64_small_plt0_bti_entry
[PLT_ENTRY_SIZE
] =
309 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
310 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
311 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
313 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
314 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
316 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
317 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
319 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
320 0x1f, 0x20, 0x03, 0xd5, /* nop */
321 0x1f, 0x20, 0x03, 0xd5, /* nop */
324 /* Per function entry in a procedure linkage table looks like this
325 if the distance between the PLTGOT and the PLT is < 4GB use
326 these PLT entries. Use BTI versions of the PLTs when enabled. */
327 static const bfd_byte elfNN_aarch64_small_plt_entry
[PLT_SMALL_ENTRY_SIZE
] =
329 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
331 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
332 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
334 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
335 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
337 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
340 static const bfd_byte
341 elfNN_aarch64_small_plt_bti_entry
[PLT_BTI_SMALL_ENTRY_SIZE
] =
343 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
344 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
346 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
347 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
349 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
350 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
352 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
353 0x1f, 0x20, 0x03, 0xd5, /* nop */
356 static const bfd_byte
357 elfNN_aarch64_small_plt_pac_entry
[PLT_PAC_SMALL_ENTRY_SIZE
] =
359 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
361 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
362 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
364 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
365 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
367 0x9f, 0x21, 0x03, 0xd5, /* autia1716 */
368 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
369 0x1f, 0x20, 0x03, 0xd5, /* nop */
372 static const bfd_byte
373 elfNN_aarch64_small_plt_bti_pac_entry
[PLT_BTI_PAC_SMALL_ENTRY_SIZE
] =
375 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
376 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
378 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
379 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
381 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
382 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
384 0x9f, 0x21, 0x03, 0xd5, /* autia1716 */
385 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
388 static const bfd_byte
389 elfNN_aarch64_tlsdesc_small_plt_entry
[PLT_TLSDESC_ENTRY_SIZE
] =
391 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
392 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
393 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
395 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
396 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
398 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
399 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
401 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
402 0x1f, 0x20, 0x03, 0xd5, /* nop */
403 0x1f, 0x20, 0x03, 0xd5, /* nop */
406 static const bfd_byte
407 elfNN_aarch64_tlsdesc_small_plt_bti_entry
[PLT_TLSDESC_ENTRY_SIZE
] =
409 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
410 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
411 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
412 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
414 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
415 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
417 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
418 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
420 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
421 0x1f, 0x20, 0x03, 0xd5, /* nop */
424 #define elf_info_to_howto elfNN_aarch64_info_to_howto
425 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
427 #define AARCH64_ELF_ABI_VERSION 0
429 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
430 #define ALL_ONES (~ (bfd_vma) 0)
432 /* Indexed by the bfd interal reloc enumerators.
433 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
436 static reloc_howto_type elfNN_aarch64_howto_table
[] =
440 /* Basic data relocations. */
442 /* Deprecated, but retained for backwards compatibility. */
443 HOWTO64 (R_AARCH64_NULL
, /* type */
445 3, /* size (0 = byte, 1 = short, 2 = long) */
447 false, /* pc_relative */
449 complain_overflow_dont
, /* complain_on_overflow */
450 bfd_elf_generic_reloc
, /* special_function */
451 "R_AARCH64_NULL", /* name */
452 false, /* partial_inplace */
455 false), /* pcrel_offset */
456 HOWTO (R_AARCH64_NONE
, /* type */
458 3, /* size (0 = byte, 1 = short, 2 = long) */
460 false, /* pc_relative */
462 complain_overflow_dont
, /* complain_on_overflow */
463 bfd_elf_generic_reloc
, /* special_function */
464 "R_AARCH64_NONE", /* name */
465 false, /* partial_inplace */
468 false), /* pcrel_offset */
471 HOWTO64 (AARCH64_R (ABS64
), /* type */
473 4, /* size (4 = long long) */
475 false, /* pc_relative */
477 complain_overflow_unsigned
, /* complain_on_overflow */
478 bfd_elf_generic_reloc
, /* special_function */
479 AARCH64_R_STR (ABS64
), /* name */
480 false, /* partial_inplace */
481 ALL_ONES
, /* src_mask */
482 ALL_ONES
, /* dst_mask */
483 false), /* pcrel_offset */
486 HOWTO (AARCH64_R (ABS32
), /* type */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
490 false, /* pc_relative */
492 complain_overflow_unsigned
, /* complain_on_overflow */
493 bfd_elf_generic_reloc
, /* special_function */
494 AARCH64_R_STR (ABS32
), /* name */
495 false, /* partial_inplace */
496 0xffffffff, /* src_mask */
497 0xffffffff, /* dst_mask */
498 false), /* pcrel_offset */
501 HOWTO (AARCH64_R (ABS16
), /* type */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
505 false, /* pc_relative */
507 complain_overflow_unsigned
, /* complain_on_overflow */
508 bfd_elf_generic_reloc
, /* special_function */
509 AARCH64_R_STR (ABS16
), /* name */
510 false, /* partial_inplace */
511 0xffff, /* src_mask */
512 0xffff, /* dst_mask */
513 false), /* pcrel_offset */
515 /* .xword: (S+A-P) */
516 HOWTO64 (AARCH64_R (PREL64
), /* type */
518 4, /* size (4 = long long) */
520 true, /* pc_relative */
522 complain_overflow_signed
, /* complain_on_overflow */
523 bfd_elf_generic_reloc
, /* special_function */
524 AARCH64_R_STR (PREL64
), /* name */
525 false, /* partial_inplace */
526 ALL_ONES
, /* src_mask */
527 ALL_ONES
, /* dst_mask */
528 true), /* pcrel_offset */
531 HOWTO (AARCH64_R (PREL32
), /* type */
533 2, /* size (0 = byte, 1 = short, 2 = long) */
535 true, /* pc_relative */
537 complain_overflow_signed
, /* complain_on_overflow */
538 bfd_elf_generic_reloc
, /* special_function */
539 AARCH64_R_STR (PREL32
), /* name */
540 false, /* partial_inplace */
541 0xffffffff, /* src_mask */
542 0xffffffff, /* dst_mask */
543 true), /* pcrel_offset */
546 HOWTO (AARCH64_R (PREL16
), /* type */
548 1, /* size (0 = byte, 1 = short, 2 = long) */
550 true, /* pc_relative */
552 complain_overflow_signed
, /* complain_on_overflow */
553 bfd_elf_generic_reloc
, /* special_function */
554 AARCH64_R_STR (PREL16
), /* name */
555 false, /* partial_inplace */
556 0xffff, /* src_mask */
557 0xffff, /* dst_mask */
558 true), /* pcrel_offset */
560 /* Group relocations to create a 16, 32, 48 or 64 bit
561 unsigned data or abs address inline. */
563 /* MOVZ: ((S+A) >> 0) & 0xffff */
564 HOWTO (AARCH64_R (MOVW_UABS_G0
), /* type */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
568 false, /* pc_relative */
570 complain_overflow_unsigned
, /* complain_on_overflow */
571 bfd_elf_generic_reloc
, /* special_function */
572 AARCH64_R_STR (MOVW_UABS_G0
), /* name */
573 false, /* partial_inplace */
574 0xffff, /* src_mask */
575 0xffff, /* dst_mask */
576 false), /* pcrel_offset */
578 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
579 HOWTO (AARCH64_R (MOVW_UABS_G0_NC
), /* type */
581 2, /* size (0 = byte, 1 = short, 2 = long) */
583 false, /* pc_relative */
585 complain_overflow_dont
, /* complain_on_overflow */
586 bfd_elf_generic_reloc
, /* special_function */
587 AARCH64_R_STR (MOVW_UABS_G0_NC
), /* name */
588 false, /* partial_inplace */
589 0xffff, /* src_mask */
590 0xffff, /* dst_mask */
591 false), /* pcrel_offset */
593 /* MOVZ: ((S+A) >> 16) & 0xffff */
594 HOWTO (AARCH64_R (MOVW_UABS_G1
), /* type */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
598 false, /* pc_relative */
600 complain_overflow_unsigned
, /* complain_on_overflow */
601 bfd_elf_generic_reloc
, /* special_function */
602 AARCH64_R_STR (MOVW_UABS_G1
), /* name */
603 false, /* partial_inplace */
604 0xffff, /* src_mask */
605 0xffff, /* dst_mask */
606 false), /* pcrel_offset */
608 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
609 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC
), /* type */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
613 false, /* pc_relative */
615 complain_overflow_dont
, /* complain_on_overflow */
616 bfd_elf_generic_reloc
, /* special_function */
617 AARCH64_R_STR (MOVW_UABS_G1_NC
), /* name */
618 false, /* partial_inplace */
619 0xffff, /* src_mask */
620 0xffff, /* dst_mask */
621 false), /* pcrel_offset */
623 /* MOVZ: ((S+A) >> 32) & 0xffff */
624 HOWTO64 (AARCH64_R (MOVW_UABS_G2
), /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 false, /* pc_relative */
630 complain_overflow_unsigned
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 AARCH64_R_STR (MOVW_UABS_G2
), /* name */
633 false, /* partial_inplace */
634 0xffff, /* src_mask */
635 0xffff, /* dst_mask */
636 false), /* pcrel_offset */
638 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
639 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC
), /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 false, /* pc_relative */
645 complain_overflow_dont
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 AARCH64_R_STR (MOVW_UABS_G2_NC
), /* name */
648 false, /* partial_inplace */
649 0xffff, /* src_mask */
650 0xffff, /* dst_mask */
651 false), /* pcrel_offset */
653 /* MOVZ: ((S+A) >> 48) & 0xffff */
654 HOWTO64 (AARCH64_R (MOVW_UABS_G3
), /* type */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
658 false, /* pc_relative */
660 complain_overflow_unsigned
, /* complain_on_overflow */
661 bfd_elf_generic_reloc
, /* special_function */
662 AARCH64_R_STR (MOVW_UABS_G3
), /* name */
663 false, /* partial_inplace */
664 0xffff, /* src_mask */
665 0xffff, /* dst_mask */
666 false), /* pcrel_offset */
668 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
669 signed data or abs address inline. Will change instruction
670 to MOVN or MOVZ depending on sign of calculated value. */
672 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
673 HOWTO (AARCH64_R (MOVW_SABS_G0
), /* type */
675 2, /* size (0 = byte, 1 = short, 2 = long) */
677 false, /* pc_relative */
679 complain_overflow_signed
, /* complain_on_overflow */
680 bfd_elf_generic_reloc
, /* special_function */
681 AARCH64_R_STR (MOVW_SABS_G0
), /* name */
682 false, /* partial_inplace */
683 0xffff, /* src_mask */
684 0xffff, /* dst_mask */
685 false), /* pcrel_offset */
687 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
688 HOWTO64 (AARCH64_R (MOVW_SABS_G1
), /* type */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
692 false, /* pc_relative */
694 complain_overflow_signed
, /* complain_on_overflow */
695 bfd_elf_generic_reloc
, /* special_function */
696 AARCH64_R_STR (MOVW_SABS_G1
), /* name */
697 false, /* partial_inplace */
698 0xffff, /* src_mask */
699 0xffff, /* dst_mask */
700 false), /* pcrel_offset */
702 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
703 HOWTO64 (AARCH64_R (MOVW_SABS_G2
), /* type */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
707 false, /* pc_relative */
709 complain_overflow_signed
, /* complain_on_overflow */
710 bfd_elf_generic_reloc
, /* special_function */
711 AARCH64_R_STR (MOVW_SABS_G2
), /* name */
712 false, /* partial_inplace */
713 0xffff, /* src_mask */
714 0xffff, /* dst_mask */
715 false), /* pcrel_offset */
717 /* Group relocations to create a 16, 32, 48 or 64 bit
718 PC relative address inline. */
720 /* MOV[NZ]: ((S+A-P) >> 0) & 0xffff */
721 HOWTO (AARCH64_R (MOVW_PREL_G0
), /* type */
723 2, /* size (0 = byte, 1 = short, 2 = long) */
725 true, /* pc_relative */
727 complain_overflow_signed
, /* complain_on_overflow */
728 bfd_elf_generic_reloc
, /* special_function */
729 AARCH64_R_STR (MOVW_PREL_G0
), /* name */
730 false, /* partial_inplace */
731 0xffff, /* src_mask */
732 0xffff, /* dst_mask */
733 true), /* pcrel_offset */
735 /* MOVK: ((S+A-P) >> 0) & 0xffff [no overflow check] */
736 HOWTO (AARCH64_R (MOVW_PREL_G0_NC
), /* type */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
740 true, /* pc_relative */
742 complain_overflow_dont
, /* complain_on_overflow */
743 bfd_elf_generic_reloc
, /* special_function */
744 AARCH64_R_STR (MOVW_PREL_G0_NC
), /* name */
745 false, /* partial_inplace */
746 0xffff, /* src_mask */
747 0xffff, /* dst_mask */
748 true), /* pcrel_offset */
750 /* MOV[NZ]: ((S+A-P) >> 16) & 0xffff */
751 HOWTO (AARCH64_R (MOVW_PREL_G1
), /* type */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
755 true, /* pc_relative */
757 complain_overflow_signed
, /* complain_on_overflow */
758 bfd_elf_generic_reloc
, /* special_function */
759 AARCH64_R_STR (MOVW_PREL_G1
), /* name */
760 false, /* partial_inplace */
761 0xffff, /* src_mask */
762 0xffff, /* dst_mask */
763 true), /* pcrel_offset */
765 /* MOVK: ((S+A-P) >> 16) & 0xffff [no overflow check] */
766 HOWTO64 (AARCH64_R (MOVW_PREL_G1_NC
), /* type */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
770 true, /* pc_relative */
772 complain_overflow_dont
, /* complain_on_overflow */
773 bfd_elf_generic_reloc
, /* special_function */
774 AARCH64_R_STR (MOVW_PREL_G1_NC
), /* name */
775 false, /* partial_inplace */
776 0xffff, /* src_mask */
777 0xffff, /* dst_mask */
778 true), /* pcrel_offset */
780 /* MOV[NZ]: ((S+A-P) >> 32) & 0xffff */
781 HOWTO64 (AARCH64_R (MOVW_PREL_G2
), /* type */
783 2, /* size (0 = byte, 1 = short, 2 = long) */
785 true, /* pc_relative */
787 complain_overflow_signed
, /* complain_on_overflow */
788 bfd_elf_generic_reloc
, /* special_function */
789 AARCH64_R_STR (MOVW_PREL_G2
), /* name */
790 false, /* partial_inplace */
791 0xffff, /* src_mask */
792 0xffff, /* dst_mask */
793 true), /* pcrel_offset */
795 /* MOVK: ((S+A-P) >> 32) & 0xffff [no overflow check] */
796 HOWTO64 (AARCH64_R (MOVW_PREL_G2_NC
), /* type */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
800 true, /* pc_relative */
802 complain_overflow_dont
, /* complain_on_overflow */
803 bfd_elf_generic_reloc
, /* special_function */
804 AARCH64_R_STR (MOVW_PREL_G2_NC
), /* name */
805 false, /* partial_inplace */
806 0xffff, /* src_mask */
807 0xffff, /* dst_mask */
808 true), /* pcrel_offset */
810 /* MOV[NZ]: ((S+A-P) >> 48) & 0xffff */
811 HOWTO64 (AARCH64_R (MOVW_PREL_G3
), /* type */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
815 true, /* pc_relative */
817 complain_overflow_dont
, /* complain_on_overflow */
818 bfd_elf_generic_reloc
, /* special_function */
819 AARCH64_R_STR (MOVW_PREL_G3
), /* name */
820 false, /* partial_inplace */
821 0xffff, /* src_mask */
822 0xffff, /* dst_mask */
823 true), /* pcrel_offset */
825 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
826 addresses: PG(x) is (x & ~0xfff). */
828 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
829 HOWTO (AARCH64_R (LD_PREL_LO19
), /* type */
831 2, /* size (0 = byte, 1 = short, 2 = long) */
833 true, /* pc_relative */
835 complain_overflow_signed
, /* complain_on_overflow */
836 bfd_elf_generic_reloc
, /* special_function */
837 AARCH64_R_STR (LD_PREL_LO19
), /* name */
838 false, /* partial_inplace */
839 0x7ffff, /* src_mask */
840 0x7ffff, /* dst_mask */
841 true), /* pcrel_offset */
843 /* ADR: (S+A-P) & 0x1fffff */
844 HOWTO (AARCH64_R (ADR_PREL_LO21
), /* type */
846 2, /* size (0 = byte, 1 = short, 2 = long) */
848 true, /* pc_relative */
850 complain_overflow_signed
, /* complain_on_overflow */
851 bfd_elf_generic_reloc
, /* special_function */
852 AARCH64_R_STR (ADR_PREL_LO21
), /* name */
853 false, /* partial_inplace */
854 0x1fffff, /* src_mask */
855 0x1fffff, /* dst_mask */
856 true), /* pcrel_offset */
858 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
859 HOWTO (AARCH64_R (ADR_PREL_PG_HI21
), /* type */
861 2, /* size (0 = byte, 1 = short, 2 = long) */
863 true, /* pc_relative */
865 complain_overflow_signed
, /* complain_on_overflow */
866 bfd_elf_generic_reloc
, /* special_function */
867 AARCH64_R_STR (ADR_PREL_PG_HI21
), /* name */
868 false, /* partial_inplace */
869 0x1fffff, /* src_mask */
870 0x1fffff, /* dst_mask */
871 true), /* pcrel_offset */
873 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
874 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC
), /* type */
876 2, /* size (0 = byte, 1 = short, 2 = long) */
878 true, /* pc_relative */
880 complain_overflow_dont
, /* complain_on_overflow */
881 bfd_elf_generic_reloc
, /* special_function */
882 AARCH64_R_STR (ADR_PREL_PG_HI21_NC
), /* name */
883 false, /* partial_inplace */
884 0x1fffff, /* src_mask */
885 0x1fffff, /* dst_mask */
886 true), /* pcrel_offset */
888 /* ADD: (S+A) & 0xfff [no overflow check] */
889 HOWTO (AARCH64_R (ADD_ABS_LO12_NC
), /* type */
891 2, /* size (0 = byte, 1 = short, 2 = long) */
893 false, /* pc_relative */
895 complain_overflow_dont
, /* complain_on_overflow */
896 bfd_elf_generic_reloc
, /* special_function */
897 AARCH64_R_STR (ADD_ABS_LO12_NC
), /* name */
898 false, /* partial_inplace */
899 0x3ffc00, /* src_mask */
900 0x3ffc00, /* dst_mask */
901 false), /* pcrel_offset */
903 /* LD/ST8: (S+A) & 0xfff */
904 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC
), /* type */
906 2, /* size (0 = byte, 1 = short, 2 = long) */
908 false, /* pc_relative */
910 complain_overflow_dont
, /* complain_on_overflow */
911 bfd_elf_generic_reloc
, /* special_function */
912 AARCH64_R_STR (LDST8_ABS_LO12_NC
), /* name */
913 false, /* partial_inplace */
914 0xfff, /* src_mask */
915 0xfff, /* dst_mask */
916 false), /* pcrel_offset */
918 /* Relocations for control-flow instructions. */
920 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
921 HOWTO (AARCH64_R (TSTBR14
), /* type */
923 2, /* size (0 = byte, 1 = short, 2 = long) */
925 true, /* pc_relative */
927 complain_overflow_signed
, /* complain_on_overflow */
928 bfd_elf_generic_reloc
, /* special_function */
929 AARCH64_R_STR (TSTBR14
), /* name */
930 false, /* partial_inplace */
931 0x3fff, /* src_mask */
932 0x3fff, /* dst_mask */
933 true), /* pcrel_offset */
935 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
936 HOWTO (AARCH64_R (CONDBR19
), /* type */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
940 true, /* pc_relative */
942 complain_overflow_signed
, /* complain_on_overflow */
943 bfd_elf_generic_reloc
, /* special_function */
944 AARCH64_R_STR (CONDBR19
), /* name */
945 false, /* partial_inplace */
946 0x7ffff, /* src_mask */
947 0x7ffff, /* dst_mask */
948 true), /* pcrel_offset */
950 /* B: ((S+A-P) >> 2) & 0x3ffffff */
951 HOWTO (AARCH64_R (JUMP26
), /* type */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
955 true, /* pc_relative */
957 complain_overflow_signed
, /* complain_on_overflow */
958 bfd_elf_generic_reloc
, /* special_function */
959 AARCH64_R_STR (JUMP26
), /* name */
960 false, /* partial_inplace */
961 0x3ffffff, /* src_mask */
962 0x3ffffff, /* dst_mask */
963 true), /* pcrel_offset */
965 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
966 HOWTO (AARCH64_R (CALL26
), /* type */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
970 true, /* pc_relative */
972 complain_overflow_signed
, /* complain_on_overflow */
973 bfd_elf_generic_reloc
, /* special_function */
974 AARCH64_R_STR (CALL26
), /* name */
975 false, /* partial_inplace */
976 0x3ffffff, /* src_mask */
977 0x3ffffff, /* dst_mask */
978 true), /* pcrel_offset */
980 /* LD/ST16: (S+A) & 0xffe */
981 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC
), /* type */
983 2, /* size (0 = byte, 1 = short, 2 = long) */
985 false, /* pc_relative */
987 complain_overflow_dont
, /* complain_on_overflow */
988 bfd_elf_generic_reloc
, /* special_function */
989 AARCH64_R_STR (LDST16_ABS_LO12_NC
), /* name */
990 false, /* partial_inplace */
991 0xffe, /* src_mask */
992 0xffe, /* dst_mask */
993 false), /* pcrel_offset */
995 /* LD/ST32: (S+A) & 0xffc */
996 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC
), /* type */
998 2, /* size (0 = byte, 1 = short, 2 = long) */
1000 false, /* pc_relative */
1002 complain_overflow_dont
, /* complain_on_overflow */
1003 bfd_elf_generic_reloc
, /* special_function */
1004 AARCH64_R_STR (LDST32_ABS_LO12_NC
), /* name */
1005 false, /* partial_inplace */
1006 0xffc, /* src_mask */
1007 0xffc, /* dst_mask */
1008 false), /* pcrel_offset */
1010 /* LD/ST64: (S+A) & 0xff8 */
1011 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC
), /* type */
1013 2, /* size (0 = byte, 1 = short, 2 = long) */
1015 false, /* pc_relative */
1017 complain_overflow_dont
, /* complain_on_overflow */
1018 bfd_elf_generic_reloc
, /* special_function */
1019 AARCH64_R_STR (LDST64_ABS_LO12_NC
), /* name */
1020 false, /* partial_inplace */
1021 0xff8, /* src_mask */
1022 0xff8, /* dst_mask */
1023 false), /* pcrel_offset */
1025 /* LD/ST128: (S+A) & 0xff0 */
1026 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC
), /* type */
1028 2, /* size (0 = byte, 1 = short, 2 = long) */
1030 false, /* pc_relative */
1032 complain_overflow_dont
, /* complain_on_overflow */
1033 bfd_elf_generic_reloc
, /* special_function */
1034 AARCH64_R_STR (LDST128_ABS_LO12_NC
), /* name */
1035 false, /* partial_inplace */
1036 0xff0, /* src_mask */
1037 0xff0, /* dst_mask */
1038 false), /* pcrel_offset */
1040 /* Set a load-literal immediate field to bits
1041 0x1FFFFC of G(S)-P */
1042 HOWTO (AARCH64_R (GOT_LD_PREL19
), /* type */
1044 2, /* size (0 = byte,1 = short,2 = long) */
1046 true, /* pc_relative */
1048 complain_overflow_signed
, /* complain_on_overflow */
1049 bfd_elf_generic_reloc
, /* special_function */
1050 AARCH64_R_STR (GOT_LD_PREL19
), /* name */
1051 false, /* partial_inplace */
1052 0xffffe0, /* src_mask */
1053 0xffffe0, /* dst_mask */
1054 true), /* pcrel_offset */
1056 /* Get to the page for the GOT entry for the symbol
1057 (G(S) - P) using an ADRP instruction. */
1058 HOWTO (AARCH64_R (ADR_GOT_PAGE
), /* type */
1059 12, /* rightshift */
1060 2, /* size (0 = byte, 1 = short, 2 = long) */
1062 true, /* pc_relative */
1064 complain_overflow_dont
, /* complain_on_overflow */
1065 bfd_elf_generic_reloc
, /* special_function */
1066 AARCH64_R_STR (ADR_GOT_PAGE
), /* name */
1067 false, /* partial_inplace */
1068 0x1fffff, /* src_mask */
1069 0x1fffff, /* dst_mask */
1070 true), /* pcrel_offset */
1072 /* LD64: GOT offset G(S) & 0xff8 */
1073 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC
), /* type */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1077 false, /* pc_relative */
1079 complain_overflow_dont
, /* complain_on_overflow */
1080 bfd_elf_generic_reloc
, /* special_function */
1081 AARCH64_R_STR (LD64_GOT_LO12_NC
), /* name */
1082 false, /* partial_inplace */
1083 0xff8, /* src_mask */
1084 0xff8, /* dst_mask */
1085 false), /* pcrel_offset */
1087 /* LD32: GOT offset G(S) & 0xffc */
1088 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC
), /* type */
1090 2, /* size (0 = byte, 1 = short, 2 = long) */
1092 false, /* pc_relative */
1094 complain_overflow_dont
, /* complain_on_overflow */
1095 bfd_elf_generic_reloc
, /* special_function */
1096 AARCH64_R_STR (LD32_GOT_LO12_NC
), /* name */
1097 false, /* partial_inplace */
1098 0xffc, /* src_mask */
1099 0xffc, /* dst_mask */
1100 false), /* pcrel_offset */
1102 /* Lower 16 bits of GOT offset for the symbol. */
1103 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC
), /* type */
1105 2, /* size (0 = byte, 1 = short, 2 = long) */
1107 false, /* pc_relative */
1109 complain_overflow_dont
, /* complain_on_overflow */
1110 bfd_elf_generic_reloc
, /* special_function */
1111 AARCH64_R_STR (MOVW_GOTOFF_G0_NC
), /* name */
1112 false, /* partial_inplace */
1113 0xffff, /* src_mask */
1114 0xffff, /* dst_mask */
1115 false), /* pcrel_offset */
1117 /* Higher 16 bits of GOT offset for the symbol. */
1118 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1
), /* type */
1119 16, /* rightshift */
1120 2, /* size (0 = byte, 1 = short, 2 = long) */
1122 false, /* pc_relative */
1124 complain_overflow_unsigned
, /* complain_on_overflow */
1125 bfd_elf_generic_reloc
, /* special_function */
1126 AARCH64_R_STR (MOVW_GOTOFF_G1
), /* name */
1127 false, /* partial_inplace */
1128 0xffff, /* src_mask */
1129 0xffff, /* dst_mask */
1130 false), /* pcrel_offset */
1132 /* LD64: GOT offset for the symbol. */
1133 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15
), /* type */
1135 2, /* size (0 = byte, 1 = short, 2 = long) */
1137 false, /* pc_relative */
1139 complain_overflow_unsigned
, /* complain_on_overflow */
1140 bfd_elf_generic_reloc
, /* special_function */
1141 AARCH64_R_STR (LD64_GOTOFF_LO15
), /* name */
1142 false, /* partial_inplace */
1143 0x7ff8, /* src_mask */
1144 0x7ff8, /* dst_mask */
1145 false), /* pcrel_offset */
1147 /* LD32: GOT offset to the page address of GOT table.
1148 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
1149 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14
), /* 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 (LD32_GOTPAGE_LO14
), /* name */
1158 false, /* partial_inplace */
1159 0x5ffc, /* src_mask */
1160 0x5ffc, /* dst_mask */
1161 false), /* pcrel_offset */
1163 /* LD64: GOT offset to the page address of GOT table.
1164 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
1165 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15
), /* type */
1167 2, /* size (0 = byte, 1 = short, 2 = long) */
1169 false, /* pc_relative */
1171 complain_overflow_unsigned
, /* complain_on_overflow */
1172 bfd_elf_generic_reloc
, /* special_function */
1173 AARCH64_R_STR (LD64_GOTPAGE_LO15
), /* name */
1174 false, /* partial_inplace */
1175 0x7ff8, /* src_mask */
1176 0x7ff8, /* dst_mask */
1177 false), /* pcrel_offset */
1179 /* Get to the page for the GOT entry for the symbol
1180 (G(S) - P) using an ADRP instruction. */
1181 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21
), /* type */
1182 12, /* rightshift */
1183 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 true, /* pc_relative */
1187 complain_overflow_dont
, /* complain_on_overflow */
1188 bfd_elf_generic_reloc
, /* special_function */
1189 AARCH64_R_STR (TLSGD_ADR_PAGE21
), /* name */
1190 false, /* partial_inplace */
1191 0x1fffff, /* src_mask */
1192 0x1fffff, /* dst_mask */
1193 true), /* pcrel_offset */
1195 HOWTO (AARCH64_R (TLSGD_ADR_PREL21
), /* type */
1197 2, /* size (0 = byte, 1 = short, 2 = long) */
1199 true, /* pc_relative */
1201 complain_overflow_dont
, /* complain_on_overflow */
1202 bfd_elf_generic_reloc
, /* special_function */
1203 AARCH64_R_STR (TLSGD_ADR_PREL21
), /* name */
1204 false, /* partial_inplace */
1205 0x1fffff, /* src_mask */
1206 0x1fffff, /* dst_mask */
1207 true), /* pcrel_offset */
1209 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1210 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC
), /* type */
1212 2, /* size (0 = byte, 1 = short, 2 = long) */
1214 false, /* pc_relative */
1216 complain_overflow_dont
, /* complain_on_overflow */
1217 bfd_elf_generic_reloc
, /* special_function */
1218 AARCH64_R_STR (TLSGD_ADD_LO12_NC
), /* name */
1219 false, /* partial_inplace */
1220 0xfff, /* src_mask */
1221 0xfff, /* dst_mask */
1222 false), /* pcrel_offset */
1224 /* Lower 16 bits of GOT offset to tls_index. */
1225 HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC
), /* type */
1227 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 false, /* pc_relative */
1231 complain_overflow_dont
, /* complain_on_overflow */
1232 bfd_elf_generic_reloc
, /* special_function */
1233 AARCH64_R_STR (TLSGD_MOVW_G0_NC
), /* name */
1234 false, /* partial_inplace */
1235 0xffff, /* src_mask */
1236 0xffff, /* dst_mask */
1237 false), /* pcrel_offset */
1239 /* Higher 16 bits of GOT offset to tls_index. */
1240 HOWTO64 (AARCH64_R (TLSGD_MOVW_G1
), /* type */
1241 16, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1244 false, /* pc_relative */
1246 complain_overflow_unsigned
, /* complain_on_overflow */
1247 bfd_elf_generic_reloc
, /* special_function */
1248 AARCH64_R_STR (TLSGD_MOVW_G1
), /* name */
1249 false, /* partial_inplace */
1250 0xffff, /* src_mask */
1251 0xffff, /* dst_mask */
1252 false), /* pcrel_offset */
1254 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21
), /* type */
1255 12, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1258 false, /* pc_relative */
1260 complain_overflow_dont
, /* complain_on_overflow */
1261 bfd_elf_generic_reloc
, /* special_function */
1262 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21
), /* name */
1263 false, /* partial_inplace */
1264 0x1fffff, /* src_mask */
1265 0x1fffff, /* dst_mask */
1266 false), /* pcrel_offset */
1268 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC
), /* type */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 false, /* pc_relative */
1274 complain_overflow_dont
, /* complain_on_overflow */
1275 bfd_elf_generic_reloc
, /* special_function */
1276 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC
), /* name */
1277 false, /* partial_inplace */
1278 0xff8, /* src_mask */
1279 0xff8, /* dst_mask */
1280 false), /* pcrel_offset */
1282 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC
), /* type */
1284 2, /* size (0 = byte, 1 = short, 2 = long) */
1286 false, /* pc_relative */
1288 complain_overflow_dont
, /* complain_on_overflow */
1289 bfd_elf_generic_reloc
, /* special_function */
1290 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC
), /* name */
1291 false, /* partial_inplace */
1292 0xffc, /* src_mask */
1293 0xffc, /* dst_mask */
1294 false), /* pcrel_offset */
1296 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19
), /* type */
1298 2, /* size (0 = byte, 1 = short, 2 = long) */
1300 false, /* pc_relative */
1302 complain_overflow_dont
, /* complain_on_overflow */
1303 bfd_elf_generic_reloc
, /* special_function */
1304 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19
), /* name */
1305 false, /* partial_inplace */
1306 0x1ffffc, /* src_mask */
1307 0x1ffffc, /* dst_mask */
1308 false), /* pcrel_offset */
1310 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC
), /* type */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 false, /* pc_relative */
1316 complain_overflow_dont
, /* complain_on_overflow */
1317 bfd_elf_generic_reloc
, /* special_function */
1318 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC
), /* name */
1319 false, /* partial_inplace */
1320 0xffff, /* src_mask */
1321 0xffff, /* dst_mask */
1322 false), /* pcrel_offset */
1324 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1
), /* type */
1325 16, /* rightshift */
1326 2, /* size (0 = byte, 1 = short, 2 = long) */
1328 false, /* pc_relative */
1330 complain_overflow_unsigned
, /* complain_on_overflow */
1331 bfd_elf_generic_reloc
, /* special_function */
1332 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1
), /* name */
1333 false, /* partial_inplace */
1334 0xffff, /* src_mask */
1335 0xffff, /* dst_mask */
1336 false), /* pcrel_offset */
1338 /* ADD: bit[23:12] of byte offset to module TLS base address. */
1339 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12
), /* type */
1340 12, /* rightshift */
1341 2, /* size (0 = byte, 1 = short, 2 = long) */
1343 false, /* pc_relative */
1345 complain_overflow_unsigned
, /* complain_on_overflow */
1346 bfd_elf_generic_reloc
, /* special_function */
1347 AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12
), /* name */
1348 false, /* partial_inplace */
1349 0xfff, /* src_mask */
1350 0xfff, /* dst_mask */
1351 false), /* pcrel_offset */
1353 /* Unsigned 12 bit byte offset to module TLS base address. */
1354 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12
), /* type */
1356 2, /* size (0 = byte, 1 = short, 2 = long) */
1358 false, /* pc_relative */
1360 complain_overflow_unsigned
, /* complain_on_overflow */
1361 bfd_elf_generic_reloc
, /* special_function */
1362 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12
), /* name */
1363 false, /* partial_inplace */
1364 0xfff, /* src_mask */
1365 0xfff, /* dst_mask */
1366 false), /* pcrel_offset */
1368 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1369 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC
), /* type */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1373 false, /* pc_relative */
1375 complain_overflow_dont
, /* complain_on_overflow */
1376 bfd_elf_generic_reloc
, /* special_function */
1377 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC
), /* name */
1378 false, /* partial_inplace */
1379 0xfff, /* src_mask */
1380 0xfff, /* dst_mask */
1381 false), /* pcrel_offset */
1383 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1384 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC
), /* type */
1386 2, /* size (0 = byte, 1 = short, 2 = long) */
1388 false, /* pc_relative */
1390 complain_overflow_dont
, /* complain_on_overflow */
1391 bfd_elf_generic_reloc
, /* special_function */
1392 AARCH64_R_STR (TLSLD_ADD_LO12_NC
), /* name */
1393 false, /* partial_inplace */
1394 0xfff, /* src_mask */
1395 0xfff, /* dst_mask */
1396 false), /* pcrel_offset */
1398 /* Get to the page for the GOT entry for the symbol
1399 (G(S) - P) using an ADRP instruction. */
1400 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21
), /* type */
1401 12, /* rightshift */
1402 2, /* size (0 = byte, 1 = short, 2 = long) */
1404 true, /* pc_relative */
1406 complain_overflow_signed
, /* complain_on_overflow */
1407 bfd_elf_generic_reloc
, /* special_function */
1408 AARCH64_R_STR (TLSLD_ADR_PAGE21
), /* name */
1409 false, /* partial_inplace */
1410 0x1fffff, /* src_mask */
1411 0x1fffff, /* dst_mask */
1412 true), /* pcrel_offset */
1414 HOWTO (AARCH64_R (TLSLD_ADR_PREL21
), /* type */
1416 2, /* size (0 = byte, 1 = short, 2 = long) */
1418 true, /* pc_relative */
1420 complain_overflow_signed
, /* complain_on_overflow */
1421 bfd_elf_generic_reloc
, /* special_function */
1422 AARCH64_R_STR (TLSLD_ADR_PREL21
), /* name */
1423 false, /* partial_inplace */
1424 0x1fffff, /* src_mask */
1425 0x1fffff, /* dst_mask */
1426 true), /* pcrel_offset */
1428 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1429 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12
), /* type */
1431 2, /* size (0 = byte, 1 = short, 2 = long) */
1433 false, /* pc_relative */
1435 complain_overflow_unsigned
, /* complain_on_overflow */
1436 bfd_elf_generic_reloc
, /* special_function */
1437 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12
), /* name */
1438 false, /* partial_inplace */
1439 0x1ffc00, /* src_mask */
1440 0x1ffc00, /* dst_mask */
1441 false), /* pcrel_offset */
1443 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1444 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC
), /* type */
1446 2, /* size (0 = byte, 1 = short, 2 = long) */
1448 false, /* pc_relative */
1450 complain_overflow_dont
, /* complain_on_overflow */
1451 bfd_elf_generic_reloc
, /* special_function */
1452 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC
), /* name */
1453 false, /* partial_inplace */
1454 0x1ffc00, /* src_mask */
1455 0x1ffc00, /* dst_mask */
1456 false), /* pcrel_offset */
1458 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1459 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12
), /* type */
1461 2, /* size (0 = byte, 1 = short, 2 = long) */
1463 false, /* pc_relative */
1465 complain_overflow_unsigned
, /* complain_on_overflow */
1466 bfd_elf_generic_reloc
, /* special_function */
1467 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12
), /* name */
1468 false, /* partial_inplace */
1469 0x3ffc00, /* src_mask */
1470 0x3ffc00, /* dst_mask */
1471 false), /* pcrel_offset */
1473 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1474 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_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 (TLSLD_LDST32_DTPREL_LO12_NC
), /* name */
1483 false, /* partial_inplace */
1484 0xffc00, /* src_mask */
1485 0xffc00, /* dst_mask */
1486 false), /* pcrel_offset */
1488 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1489 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12
), /* type */
1491 2, /* size (0 = byte, 1 = short, 2 = long) */
1493 false, /* pc_relative */
1495 complain_overflow_unsigned
, /* complain_on_overflow */
1496 bfd_elf_generic_reloc
, /* special_function */
1497 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12
), /* name */
1498 false, /* partial_inplace */
1499 0x3ffc00, /* src_mask */
1500 0x3ffc00, /* dst_mask */
1501 false), /* pcrel_offset */
1503 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1504 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC
), /* type */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1508 false, /* pc_relative */
1510 complain_overflow_dont
, /* complain_on_overflow */
1511 bfd_elf_generic_reloc
, /* special_function */
1512 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC
), /* name */
1513 false, /* partial_inplace */
1514 0x7fc00, /* src_mask */
1515 0x7fc00, /* dst_mask */
1516 false), /* pcrel_offset */
1518 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1519 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12
), /* type */
1521 2, /* size (0 = byte, 1 = short, 2 = long) */
1523 false, /* pc_relative */
1525 complain_overflow_unsigned
, /* complain_on_overflow */
1526 bfd_elf_generic_reloc
, /* special_function */
1527 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12
), /* name */
1528 false, /* partial_inplace */
1529 0x3ffc00, /* src_mask */
1530 0x3ffc00, /* dst_mask */
1531 false), /* pcrel_offset */
1533 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1534 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC
), /* type */
1536 2, /* size (0 = byte, 1 = short, 2 = long) */
1538 false, /* pc_relative */
1540 complain_overflow_dont
, /* complain_on_overflow */
1541 bfd_elf_generic_reloc
, /* special_function */
1542 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC
), /* name */
1543 false, /* partial_inplace */
1544 0x3ffc00, /* src_mask */
1545 0x3ffc00, /* dst_mask */
1546 false), /* pcrel_offset */
1548 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1549 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0
), /* type */
1551 2, /* size (0 = byte, 1 = short, 2 = long) */
1553 false, /* pc_relative */
1555 complain_overflow_unsigned
, /* complain_on_overflow */
1556 bfd_elf_generic_reloc
, /* special_function */
1557 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0
), /* name */
1558 false, /* partial_inplace */
1559 0xffff, /* src_mask */
1560 0xffff, /* dst_mask */
1561 false), /* pcrel_offset */
1563 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1564 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC
), /* type */
1566 2, /* size (0 = byte, 1 = short, 2 = long) */
1568 false, /* pc_relative */
1570 complain_overflow_dont
, /* complain_on_overflow */
1571 bfd_elf_generic_reloc
, /* special_function */
1572 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC
), /* name */
1573 false, /* partial_inplace */
1574 0xffff, /* src_mask */
1575 0xffff, /* dst_mask */
1576 false), /* pcrel_offset */
1578 /* MOVZ: bit[31:16] of byte offset to module TLS base address. */
1579 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1
), /* type */
1580 16, /* rightshift */
1581 2, /* size (0 = byte, 1 = short, 2 = long) */
1583 false, /* pc_relative */
1585 complain_overflow_unsigned
, /* complain_on_overflow */
1586 bfd_elf_generic_reloc
, /* special_function */
1587 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1
), /* name */
1588 false, /* partial_inplace */
1589 0xffff, /* src_mask */
1590 0xffff, /* dst_mask */
1591 false), /* pcrel_offset */
1593 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */
1594 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC
), /* type */
1595 16, /* rightshift */
1596 2, /* size (0 = byte, 1 = short, 2 = long) */
1598 false, /* pc_relative */
1600 complain_overflow_dont
, /* complain_on_overflow */
1601 bfd_elf_generic_reloc
, /* special_function */
1602 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC
), /* name */
1603 false, /* partial_inplace */
1604 0xffff, /* src_mask */
1605 0xffff, /* dst_mask */
1606 false), /* pcrel_offset */
1608 /* MOVZ: bit[47:32] of byte offset to module TLS base address. */
1609 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2
), /* type */
1610 32, /* rightshift */
1611 2, /* size (0 = byte, 1 = short, 2 = long) */
1613 false, /* pc_relative */
1615 complain_overflow_unsigned
, /* complain_on_overflow */
1616 bfd_elf_generic_reloc
, /* special_function */
1617 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2
), /* name */
1618 false, /* partial_inplace */
1619 0xffff, /* src_mask */
1620 0xffff, /* dst_mask */
1621 false), /* pcrel_offset */
1623 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2
), /* type */
1624 32, /* rightshift */
1625 2, /* size (0 = byte, 1 = short, 2 = long) */
1627 false, /* pc_relative */
1629 complain_overflow_unsigned
, /* complain_on_overflow */
1630 bfd_elf_generic_reloc
, /* special_function */
1631 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2
), /* name */
1632 false, /* partial_inplace */
1633 0xffff, /* src_mask */
1634 0xffff, /* dst_mask */
1635 false), /* pcrel_offset */
1637 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1
), /* type */
1638 16, /* rightshift */
1639 2, /* size (0 = byte, 1 = short, 2 = long) */
1641 false, /* pc_relative */
1643 complain_overflow_dont
, /* complain_on_overflow */
1644 bfd_elf_generic_reloc
, /* special_function */
1645 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1
), /* name */
1646 false, /* partial_inplace */
1647 0xffff, /* src_mask */
1648 0xffff, /* dst_mask */
1649 false), /* pcrel_offset */
1651 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC
), /* type */
1652 16, /* rightshift */
1653 2, /* size (0 = byte, 1 = short, 2 = long) */
1655 false, /* pc_relative */
1657 complain_overflow_dont
, /* complain_on_overflow */
1658 bfd_elf_generic_reloc
, /* special_function */
1659 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC
), /* name */
1660 false, /* partial_inplace */
1661 0xffff, /* src_mask */
1662 0xffff, /* dst_mask */
1663 false), /* pcrel_offset */
1665 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0
), /* type */
1667 2, /* size (0 = byte, 1 = short, 2 = long) */
1669 false, /* pc_relative */
1671 complain_overflow_dont
, /* complain_on_overflow */
1672 bfd_elf_generic_reloc
, /* special_function */
1673 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0
), /* name */
1674 false, /* partial_inplace */
1675 0xffff, /* src_mask */
1676 0xffff, /* dst_mask */
1677 false), /* pcrel_offset */
1679 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
), /* type */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1683 false, /* pc_relative */
1685 complain_overflow_dont
, /* complain_on_overflow */
1686 bfd_elf_generic_reloc
, /* special_function */
1687 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC
), /* name */
1688 false, /* partial_inplace */
1689 0xffff, /* src_mask */
1690 0xffff, /* dst_mask */
1691 false), /* pcrel_offset */
1693 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12
), /* type */
1694 12, /* rightshift */
1695 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 false, /* pc_relative */
1699 complain_overflow_unsigned
, /* complain_on_overflow */
1700 bfd_elf_generic_reloc
, /* special_function */
1701 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12
), /* name */
1702 false, /* partial_inplace */
1703 0xfff, /* src_mask */
1704 0xfff, /* dst_mask */
1705 false), /* pcrel_offset */
1707 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12
), /* type */
1709 2, /* size (0 = byte, 1 = short, 2 = long) */
1711 false, /* pc_relative */
1713 complain_overflow_unsigned
, /* complain_on_overflow */
1714 bfd_elf_generic_reloc
, /* special_function */
1715 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12
), /* name */
1716 false, /* partial_inplace */
1717 0xfff, /* src_mask */
1718 0xfff, /* dst_mask */
1719 false), /* pcrel_offset */
1721 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
), /* type */
1723 2, /* size (0 = byte, 1 = short, 2 = long) */
1725 false, /* pc_relative */
1727 complain_overflow_dont
, /* complain_on_overflow */
1728 bfd_elf_generic_reloc
, /* special_function */
1729 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC
), /* name */
1730 false, /* partial_inplace */
1731 0xfff, /* src_mask */
1732 0xfff, /* dst_mask */
1733 false), /* pcrel_offset */
1735 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1736 HOWTO (AARCH64_R (TLSLE_LDST16_TPREL_LO12
), /* type */
1738 2, /* size (0 = byte, 1 = short, 2 = long) */
1740 false, /* pc_relative */
1742 complain_overflow_unsigned
, /* complain_on_overflow */
1743 bfd_elf_generic_reloc
, /* special_function */
1744 AARCH64_R_STR (TLSLE_LDST16_TPREL_LO12
), /* name */
1745 false, /* partial_inplace */
1746 0x1ffc00, /* src_mask */
1747 0x1ffc00, /* dst_mask */
1748 false), /* pcrel_offset */
1750 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12, but no overflow check. */
1751 HOWTO (AARCH64_R (TLSLE_LDST16_TPREL_LO12_NC
), /* type */
1753 2, /* size (0 = byte, 1 = short, 2 = long) */
1755 false, /* pc_relative */
1757 complain_overflow_dont
, /* complain_on_overflow */
1758 bfd_elf_generic_reloc
, /* special_function */
1759 AARCH64_R_STR (TLSLE_LDST16_TPREL_LO12_NC
), /* name */
1760 false, /* partial_inplace */
1761 0x1ffc00, /* src_mask */
1762 0x1ffc00, /* dst_mask */
1763 false), /* pcrel_offset */
1765 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1766 HOWTO (AARCH64_R (TLSLE_LDST32_TPREL_LO12
), /* type */
1768 2, /* size (0 = byte, 1 = short, 2 = long) */
1770 false, /* pc_relative */
1772 complain_overflow_unsigned
, /* complain_on_overflow */
1773 bfd_elf_generic_reloc
, /* special_function */
1774 AARCH64_R_STR (TLSLE_LDST32_TPREL_LO12
), /* name */
1775 false, /* partial_inplace */
1776 0xffc00, /* src_mask */
1777 0xffc00, /* dst_mask */
1778 false), /* pcrel_offset */
1780 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12, but no overflow check. */
1781 HOWTO (AARCH64_R (TLSLE_LDST32_TPREL_LO12_NC
), /* 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 */
1789 AARCH64_R_STR (TLSLE_LDST32_TPREL_LO12_NC
), /* name */
1790 false, /* partial_inplace */
1791 0xffc00, /* src_mask */
1792 0xffc00, /* dst_mask */
1793 false), /* pcrel_offset */
1795 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1796 HOWTO (AARCH64_R (TLSLE_LDST64_TPREL_LO12
), /* type */
1798 2, /* size (0 = byte, 1 = short, 2 = long) */
1800 false, /* pc_relative */
1802 complain_overflow_unsigned
, /* complain_on_overflow */
1803 bfd_elf_generic_reloc
, /* special_function */
1804 AARCH64_R_STR (TLSLE_LDST64_TPREL_LO12
), /* name */
1805 false, /* partial_inplace */
1806 0x7fc00, /* src_mask */
1807 0x7fc00, /* dst_mask */
1808 false), /* pcrel_offset */
1810 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12, but no overflow check. */
1811 HOWTO (AARCH64_R (TLSLE_LDST64_TPREL_LO12_NC
), /* type */
1813 2, /* size (0 = byte, 1 = short, 2 = long) */
1815 false, /* pc_relative */
1817 complain_overflow_dont
, /* complain_on_overflow */
1818 bfd_elf_generic_reloc
, /* special_function */
1819 AARCH64_R_STR (TLSLE_LDST64_TPREL_LO12_NC
), /* name */
1820 false, /* partial_inplace */
1821 0x7fc00, /* src_mask */
1822 0x7fc00, /* dst_mask */
1823 false), /* pcrel_offset */
1825 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1826 HOWTO (AARCH64_R (TLSLE_LDST8_TPREL_LO12
), /* type */
1828 2, /* size (0 = byte, 1 = short, 2 = long) */
1830 false, /* pc_relative */
1832 complain_overflow_unsigned
, /* complain_on_overflow */
1833 bfd_elf_generic_reloc
, /* special_function */
1834 AARCH64_R_STR (TLSLE_LDST8_TPREL_LO12
), /* name */
1835 false, /* partial_inplace */
1836 0x3ffc00, /* src_mask */
1837 0x3ffc00, /* dst_mask */
1838 false), /* pcrel_offset */
1840 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12, but no overflow check. */
1841 HOWTO (AARCH64_R (TLSLE_LDST8_TPREL_LO12_NC
), /* type */
1843 2, /* size (0 = byte, 1 = short, 2 = long) */
1845 false, /* pc_relative */
1847 complain_overflow_dont
, /* complain_on_overflow */
1848 bfd_elf_generic_reloc
, /* special_function */
1849 AARCH64_R_STR (TLSLE_LDST8_TPREL_LO12_NC
), /* name */
1850 false, /* partial_inplace */
1851 0x3ffc00, /* src_mask */
1852 0x3ffc00, /* dst_mask */
1853 false), /* pcrel_offset */
1855 HOWTO (AARCH64_R (TLSDESC_LD_PREL19
), /* type */
1857 2, /* size (0 = byte, 1 = short, 2 = long) */
1859 true, /* pc_relative */
1861 complain_overflow_dont
, /* complain_on_overflow */
1862 bfd_elf_generic_reloc
, /* special_function */
1863 AARCH64_R_STR (TLSDESC_LD_PREL19
), /* name */
1864 false, /* partial_inplace */
1865 0x0ffffe0, /* src_mask */
1866 0x0ffffe0, /* dst_mask */
1867 true), /* pcrel_offset */
1869 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21
), /* type */
1871 2, /* size (0 = byte, 1 = short, 2 = long) */
1873 true, /* pc_relative */
1875 complain_overflow_dont
, /* complain_on_overflow */
1876 bfd_elf_generic_reloc
, /* special_function */
1877 AARCH64_R_STR (TLSDESC_ADR_PREL21
), /* name */
1878 false, /* partial_inplace */
1879 0x1fffff, /* src_mask */
1880 0x1fffff, /* dst_mask */
1881 true), /* pcrel_offset */
1883 /* Get to the page for the GOT entry for the symbol
1884 (G(S) - P) using an ADRP instruction. */
1885 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21
), /* type */
1886 12, /* rightshift */
1887 2, /* size (0 = byte, 1 = short, 2 = long) */
1889 true, /* pc_relative */
1891 complain_overflow_dont
, /* complain_on_overflow */
1892 bfd_elf_generic_reloc
, /* special_function */
1893 AARCH64_R_STR (TLSDESC_ADR_PAGE21
), /* name */
1894 false, /* partial_inplace */
1895 0x1fffff, /* src_mask */
1896 0x1fffff, /* dst_mask */
1897 true), /* pcrel_offset */
1899 /* LD64: GOT offset G(S) & 0xff8. */
1900 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12
), /* type */
1902 2, /* size (0 = byte, 1 = short, 2 = long) */
1904 false, /* pc_relative */
1906 complain_overflow_dont
, /* complain_on_overflow */
1907 bfd_elf_generic_reloc
, /* special_function */
1908 AARCH64_R_STR (TLSDESC_LD64_LO12
), /* name */
1909 false, /* partial_inplace */
1910 0xff8, /* src_mask */
1911 0xff8, /* dst_mask */
1912 false), /* pcrel_offset */
1914 /* LD32: GOT offset G(S) & 0xffc. */
1915 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC
), /* type */
1917 2, /* size (0 = byte, 1 = short, 2 = long) */
1919 false, /* pc_relative */
1921 complain_overflow_dont
, /* complain_on_overflow */
1922 bfd_elf_generic_reloc
, /* special_function */
1923 AARCH64_R_STR (TLSDESC_LD32_LO12_NC
), /* name */
1924 false, /* partial_inplace */
1925 0xffc, /* src_mask */
1926 0xffc, /* dst_mask */
1927 false), /* pcrel_offset */
1929 /* ADD: GOT offset G(S) & 0xfff. */
1930 HOWTO (AARCH64_R (TLSDESC_ADD_LO12
), /* type */
1932 2, /* size (0 = byte, 1 = short, 2 = long) */
1934 false, /* pc_relative */
1936 complain_overflow_dont
,/* complain_on_overflow */
1937 bfd_elf_generic_reloc
, /* special_function */
1938 AARCH64_R_STR (TLSDESC_ADD_LO12
), /* name */
1939 false, /* partial_inplace */
1940 0xfff, /* src_mask */
1941 0xfff, /* dst_mask */
1942 false), /* pcrel_offset */
1944 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1
), /* type */
1945 16, /* rightshift */
1946 2, /* size (0 = byte, 1 = short, 2 = long) */
1948 false, /* pc_relative */
1950 complain_overflow_unsigned
, /* complain_on_overflow */
1951 bfd_elf_generic_reloc
, /* special_function */
1952 AARCH64_R_STR (TLSDESC_OFF_G1
), /* name */
1953 false, /* partial_inplace */
1954 0xffff, /* src_mask */
1955 0xffff, /* dst_mask */
1956 false), /* pcrel_offset */
1958 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC
), /* type */
1960 2, /* size (0 = byte, 1 = short, 2 = long) */
1962 false, /* pc_relative */
1964 complain_overflow_dont
, /* complain_on_overflow */
1965 bfd_elf_generic_reloc
, /* special_function */
1966 AARCH64_R_STR (TLSDESC_OFF_G0_NC
), /* name */
1967 false, /* partial_inplace */
1968 0xffff, /* src_mask */
1969 0xffff, /* dst_mask */
1970 false), /* pcrel_offset */
1972 HOWTO64 (AARCH64_R (TLSDESC_LDR
), /* type */
1974 2, /* size (0 = byte, 1 = short, 2 = long) */
1976 false, /* pc_relative */
1978 complain_overflow_dont
, /* complain_on_overflow */
1979 bfd_elf_generic_reloc
, /* special_function */
1980 AARCH64_R_STR (TLSDESC_LDR
), /* name */
1981 false, /* partial_inplace */
1984 false), /* pcrel_offset */
1986 HOWTO64 (AARCH64_R (TLSDESC_ADD
), /* type */
1988 2, /* size (0 = byte, 1 = short, 2 = long) */
1990 false, /* pc_relative */
1992 complain_overflow_dont
, /* complain_on_overflow */
1993 bfd_elf_generic_reloc
, /* special_function */
1994 AARCH64_R_STR (TLSDESC_ADD
), /* name */
1995 false, /* partial_inplace */
1998 false), /* pcrel_offset */
2000 HOWTO (AARCH64_R (TLSDESC_CALL
), /* type */
2002 2, /* size (0 = byte, 1 = short, 2 = long) */
2004 false, /* pc_relative */
2006 complain_overflow_dont
, /* complain_on_overflow */
2007 bfd_elf_generic_reloc
, /* special_function */
2008 AARCH64_R_STR (TLSDESC_CALL
), /* name */
2009 false, /* partial_inplace */
2012 false), /* pcrel_offset */
2014 HOWTO (AARCH64_R (COPY
), /* type */
2016 2, /* size (0 = byte, 1 = short, 2 = long) */
2018 false, /* pc_relative */
2020 complain_overflow_bitfield
, /* complain_on_overflow */
2021 bfd_elf_generic_reloc
, /* special_function */
2022 AARCH64_R_STR (COPY
), /* name */
2023 true, /* partial_inplace */
2024 0xffffffff, /* src_mask */
2025 0xffffffff, /* dst_mask */
2026 false), /* pcrel_offset */
2028 HOWTO (AARCH64_R (GLOB_DAT
), /* type */
2030 2, /* size (0 = byte, 1 = short, 2 = long) */
2032 false, /* pc_relative */
2034 complain_overflow_bitfield
, /* complain_on_overflow */
2035 bfd_elf_generic_reloc
, /* special_function */
2036 AARCH64_R_STR (GLOB_DAT
), /* name */
2037 true, /* partial_inplace */
2038 0xffffffff, /* src_mask */
2039 0xffffffff, /* dst_mask */
2040 false), /* pcrel_offset */
2042 HOWTO (AARCH64_R (JUMP_SLOT
), /* type */
2044 2, /* size (0 = byte, 1 = short, 2 = long) */
2046 false, /* pc_relative */
2048 complain_overflow_bitfield
, /* complain_on_overflow */
2049 bfd_elf_generic_reloc
, /* special_function */
2050 AARCH64_R_STR (JUMP_SLOT
), /* name */
2051 true, /* partial_inplace */
2052 0xffffffff, /* src_mask */
2053 0xffffffff, /* dst_mask */
2054 false), /* pcrel_offset */
2056 HOWTO (AARCH64_R (RELATIVE
), /* type */
2058 2, /* size (0 = byte, 1 = short, 2 = long) */
2060 false, /* pc_relative */
2062 complain_overflow_bitfield
, /* complain_on_overflow */
2063 bfd_elf_generic_reloc
, /* special_function */
2064 AARCH64_R_STR (RELATIVE
), /* name */
2065 true, /* partial_inplace */
2066 ALL_ONES
, /* src_mask */
2067 ALL_ONES
, /* dst_mask */
2068 false), /* pcrel_offset */
2070 HOWTO (AARCH64_R (TLS_DTPMOD
), /* type */
2072 2, /* size (0 = byte, 1 = short, 2 = long) */
2074 false, /* pc_relative */
2076 complain_overflow_dont
, /* complain_on_overflow */
2077 bfd_elf_generic_reloc
, /* special_function */
2079 AARCH64_R_STR (TLS_DTPMOD64
), /* name */
2081 AARCH64_R_STR (TLS_DTPMOD
), /* name */
2083 false, /* partial_inplace */
2085 ALL_ONES
, /* dst_mask */
2086 false), /* pc_reloffset */
2088 HOWTO (AARCH64_R (TLS_DTPREL
), /* type */
2090 2, /* size (0 = byte, 1 = short, 2 = long) */
2092 false, /* pc_relative */
2094 complain_overflow_dont
, /* complain_on_overflow */
2095 bfd_elf_generic_reloc
, /* special_function */
2097 AARCH64_R_STR (TLS_DTPREL64
), /* name */
2099 AARCH64_R_STR (TLS_DTPREL
), /* name */
2101 false, /* partial_inplace */
2103 ALL_ONES
, /* dst_mask */
2104 false), /* pcrel_offset */
2106 HOWTO (AARCH64_R (TLS_TPREL
), /* type */
2108 2, /* size (0 = byte, 1 = short, 2 = long) */
2110 false, /* pc_relative */
2112 complain_overflow_dont
, /* complain_on_overflow */
2113 bfd_elf_generic_reloc
, /* special_function */
2115 AARCH64_R_STR (TLS_TPREL64
), /* name */
2117 AARCH64_R_STR (TLS_TPREL
), /* name */
2119 false, /* partial_inplace */
2121 ALL_ONES
, /* dst_mask */
2122 false), /* pcrel_offset */
2124 HOWTO (AARCH64_R (TLSDESC
), /* type */
2126 2, /* size (0 = byte, 1 = short, 2 = long) */
2128 false, /* pc_relative */
2130 complain_overflow_dont
, /* complain_on_overflow */
2131 bfd_elf_generic_reloc
, /* special_function */
2132 AARCH64_R_STR (TLSDESC
), /* name */
2133 false, /* partial_inplace */
2135 ALL_ONES
, /* dst_mask */
2136 false), /* pcrel_offset */
2138 HOWTO (AARCH64_R (IRELATIVE
), /* type */
2140 2, /* size (0 = byte, 1 = short, 2 = long) */
2142 false, /* pc_relative */
2144 complain_overflow_bitfield
, /* complain_on_overflow */
2145 bfd_elf_generic_reloc
, /* special_function */
2146 AARCH64_R_STR (IRELATIVE
), /* name */
2147 false, /* partial_inplace */
2149 ALL_ONES
, /* dst_mask */
2150 false), /* pcrel_offset */
2155 static reloc_howto_type elfNN_aarch64_howto_none
=
2156 HOWTO (R_AARCH64_NONE
, /* type */
2158 3, /* size (0 = byte, 1 = short, 2 = long) */
2160 false, /* pc_relative */
2162 complain_overflow_dont
,/* complain_on_overflow */
2163 bfd_elf_generic_reloc
, /* special_function */
2164 "R_AARCH64_NONE", /* name */
2165 false, /* partial_inplace */
2168 false); /* pcrel_offset */
2170 /* Given HOWTO, return the bfd internal relocation enumerator. */
2172 static bfd_reloc_code_real_type
2173 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type
*howto
)
2176 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table
);
2177 const ptrdiff_t offset
2178 = howto
- elfNN_aarch64_howto_table
;
2180 if (offset
> 0 && offset
< size
- 1)
2181 return BFD_RELOC_AARCH64_RELOC_START
+ offset
;
2183 if (howto
== &elfNN_aarch64_howto_none
)
2184 return BFD_RELOC_AARCH64_NONE
;
2186 return BFD_RELOC_AARCH64_RELOC_START
;
2189 /* Given R_TYPE, return the bfd internal relocation enumerator. */
2191 static bfd_reloc_code_real_type
2192 elfNN_aarch64_bfd_reloc_from_type (bfd
*abfd
, unsigned int r_type
)
2194 static bool initialized_p
= false;
2195 /* Indexed by R_TYPE, values are offsets in the howto_table. */
2196 static unsigned int offsets
[R_AARCH64_end
];
2202 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
2203 if (elfNN_aarch64_howto_table
[i
].type
!= 0)
2204 offsets
[elfNN_aarch64_howto_table
[i
].type
] = i
;
2206 initialized_p
= true;
2209 if (r_type
== R_AARCH64_NONE
|| r_type
== R_AARCH64_NULL
)
2210 return BFD_RELOC_AARCH64_NONE
;
2212 /* PR 17512: file: b371e70a. */
2213 if (r_type
>= R_AARCH64_end
)
2215 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2217 bfd_set_error (bfd_error_bad_value
);
2218 return BFD_RELOC_AARCH64_NONE
;
2221 return BFD_RELOC_AARCH64_RELOC_START
+ offsets
[r_type
];
2224 struct elf_aarch64_reloc_map
2226 bfd_reloc_code_real_type from
;
2227 bfd_reloc_code_real_type to
;
2230 /* Map bfd generic reloc to AArch64-specific reloc. */
2231 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map
[] =
2233 {BFD_RELOC_NONE
, BFD_RELOC_AARCH64_NONE
},
2235 /* Basic data relocations. */
2236 {BFD_RELOC_CTOR
, BFD_RELOC_AARCH64_NN
},
2237 {BFD_RELOC_64
, BFD_RELOC_AARCH64_64
},
2238 {BFD_RELOC_32
, BFD_RELOC_AARCH64_32
},
2239 {BFD_RELOC_16
, BFD_RELOC_AARCH64_16
},
2240 {BFD_RELOC_64_PCREL
, BFD_RELOC_AARCH64_64_PCREL
},
2241 {BFD_RELOC_32_PCREL
, BFD_RELOC_AARCH64_32_PCREL
},
2242 {BFD_RELOC_16_PCREL
, BFD_RELOC_AARCH64_16_PCREL
},
2245 /* Given the bfd internal relocation enumerator in CODE, return the
2246 corresponding howto entry. */
2248 static reloc_howto_type
*
2249 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code
)
2253 /* Convert bfd generic reloc to AArch64-specific reloc. */
2254 if (code
< BFD_RELOC_AARCH64_RELOC_START
2255 || code
> BFD_RELOC_AARCH64_RELOC_END
)
2256 for (i
= 0; i
< ARRAY_SIZE (elf_aarch64_reloc_map
); i
++)
2257 if (elf_aarch64_reloc_map
[i
].from
== code
)
2259 code
= elf_aarch64_reloc_map
[i
].to
;
2263 if (code
> BFD_RELOC_AARCH64_RELOC_START
2264 && code
< BFD_RELOC_AARCH64_RELOC_END
)
2265 if (elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
].type
)
2266 return &elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
];
2268 if (code
== BFD_RELOC_AARCH64_NONE
)
2269 return &elfNN_aarch64_howto_none
;
2274 static reloc_howto_type
*
2275 elfNN_aarch64_howto_from_type (bfd
*abfd
, unsigned int r_type
)
2277 bfd_reloc_code_real_type val
;
2278 reloc_howto_type
*howto
;
2283 bfd_set_error (bfd_error_bad_value
);
2288 if (r_type
== R_AARCH64_NONE
)
2289 return &elfNN_aarch64_howto_none
;
2291 val
= elfNN_aarch64_bfd_reloc_from_type (abfd
, r_type
);
2292 howto
= elfNN_aarch64_howto_from_bfd_reloc (val
);
2297 bfd_set_error (bfd_error_bad_value
);
2302 elfNN_aarch64_info_to_howto (bfd
*abfd
, arelent
*bfd_reloc
,
2303 Elf_Internal_Rela
*elf_reloc
)
2305 unsigned int r_type
;
2307 r_type
= ELFNN_R_TYPE (elf_reloc
->r_info
);
2308 bfd_reloc
->howto
= elfNN_aarch64_howto_from_type (abfd
, r_type
);
2310 if (bfd_reloc
->howto
== NULL
)
2312 /* xgettext:c-format */
2313 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd
, r_type
);
2319 static reloc_howto_type
*
2320 elfNN_aarch64_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
2321 bfd_reloc_code_real_type code
)
2323 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (code
);
2328 bfd_set_error (bfd_error_bad_value
);
2332 static reloc_howto_type
*
2333 elfNN_aarch64_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
2338 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
2339 if (elfNN_aarch64_howto_table
[i
].name
!= NULL
2340 && strcasecmp (elfNN_aarch64_howto_table
[i
].name
, r_name
) == 0)
2341 return &elfNN_aarch64_howto_table
[i
];
2346 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
2347 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
2348 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
2349 #define TARGET_BIG_NAME "elfNN-bigaarch64"
2351 /* The linker script knows the section names for placement.
2352 The entry_names are used to do simple name mangling on the stubs.
2353 Given a function name, and its type, the stub can be found. The
2354 name can be changed. The only requirement is the %s be present. */
2355 #define STUB_ENTRY_NAME "__%s_veneer"
2357 /* The name of the dynamic interpreter. This is put in the .interp
2359 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
2361 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
2362 (((1 << 25) - 1) << 2)
2363 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
2366 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
2367 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
2370 aarch64_valid_for_adrp_p (bfd_vma value
, bfd_vma place
)
2372 bfd_signed_vma offset
= (bfd_signed_vma
) (PG (value
) - PG (place
)) >> 12;
2373 return offset
<= AARCH64_MAX_ADRP_IMM
&& offset
>= AARCH64_MIN_ADRP_IMM
;
2377 aarch64_valid_branch_p (bfd_vma value
, bfd_vma place
)
2379 bfd_signed_vma offset
= (bfd_signed_vma
) (value
- place
);
2380 return (offset
<= AARCH64_MAX_FWD_BRANCH_OFFSET
2381 && offset
>= AARCH64_MAX_BWD_BRANCH_OFFSET
);
2384 static const uint32_t aarch64_adrp_branch_stub
[] =
2386 0x90000010, /* adrp ip0, X */
2387 /* R_AARCH64_ADR_HI21_PCREL(X) */
2388 0x91000210, /* add ip0, ip0, :lo12:X */
2389 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
2390 0xd61f0200, /* br ip0 */
2393 static const uint32_t aarch64_long_branch_stub
[] =
2396 0x58000090, /* ldr ip0, 1f */
2398 0x18000090, /* ldr wip0, 1f */
2400 0x10000011, /* adr ip1, #0 */
2401 0x8b110210, /* add ip0, ip0, ip1 */
2402 0xd61f0200, /* br ip0 */
2403 0x00000000, /* 1: .xword or .word
2404 R_AARCH64_PRELNN(X) + 12
2409 static const uint32_t aarch64_erratum_835769_stub
[] =
2411 0x00000000, /* Placeholder for multiply accumulate. */
2412 0x14000000, /* b <label> */
2415 static const uint32_t aarch64_erratum_843419_stub
[] =
2417 0x00000000, /* Placeholder for LDR instruction. */
2418 0x14000000, /* b <label> */
2421 /* Section name for stubs is the associated section name plus this
2423 #define STUB_SUFFIX ".stub"
2425 enum elf_aarch64_stub_type
2428 aarch64_stub_adrp_branch
,
2429 aarch64_stub_long_branch
,
2430 aarch64_stub_erratum_835769_veneer
,
2431 aarch64_stub_erratum_843419_veneer
,
2434 struct elf_aarch64_stub_hash_entry
2436 /* Base hash table entry structure. */
2437 struct bfd_hash_entry root
;
2439 /* The stub section. */
2442 /* Offset within stub_sec of the beginning of this stub. */
2443 bfd_vma stub_offset
;
2445 /* Given the symbol's value and its section we can determine its final
2446 value when building the stubs (so the stub knows where to jump). */
2447 bfd_vma target_value
;
2448 asection
*target_section
;
2450 enum elf_aarch64_stub_type stub_type
;
2452 /* The symbol table entry, if any, that this was derived from. */
2453 struct elf_aarch64_link_hash_entry
*h
;
2455 /* Destination symbol type */
2456 unsigned char st_type
;
2458 /* Where this stub is being called from, or, in the case of combined
2459 stub sections, the first input section in the group. */
2462 /* The name for the local symbol at the start of this stub. The
2463 stub name in the hash table has to be unique; this does not, so
2464 it can be friendlier. */
2467 /* The instruction which caused this stub to be generated (only valid for
2468 erratum 835769 workaround stubs at present). */
2469 uint32_t veneered_insn
;
2471 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2472 bfd_vma adrp_offset
;
2475 /* Used to build a map of a section. This is required for mixed-endian
2478 typedef struct elf_elf_section_map
2483 elf_aarch64_section_map
;
2486 typedef struct _aarch64_elf_section_data
2488 struct bfd_elf_section_data elf
;
2489 unsigned int mapcount
;
2490 unsigned int mapsize
;
2491 elf_aarch64_section_map
*map
;
2493 _aarch64_elf_section_data
;
2495 #define elf_aarch64_section_data(sec) \
2496 ((_aarch64_elf_section_data *) elf_section_data (sec))
2498 /* The size of the thread control block which is defined to be two pointers. */
2499 #define TCB_SIZE (ARCH_SIZE/8)*2
2501 struct elf_aarch64_local_symbol
2503 unsigned int got_type
;
2504 bfd_signed_vma got_refcount
;
2507 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
2508 offset is from the end of the jump table and reserved entries
2511 The magic value (bfd_vma) -1 indicates that an offset has not be
2513 bfd_vma tlsdesc_got_jump_table_offset
;
2516 struct elf_aarch64_obj_tdata
2518 struct elf_obj_tdata root
;
2520 /* local symbol descriptors */
2521 struct elf_aarch64_local_symbol
*locals
;
2523 /* Zero to warn when linking objects with incompatible enum sizes. */
2524 int no_enum_size_warning
;
2526 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2527 int no_wchar_size_warning
;
2529 /* All GNU_PROPERTY_AARCH64_FEATURE_1_AND properties. */
2530 uint32_t gnu_and_prop
;
2532 /* Zero to warn when linking objects with incompatible
2533 GNU_PROPERTY_AARCH64_FEATURE_1_BTI. */
2536 /* PLT type based on security. */
2537 aarch64_plt_type plt_type
;
2540 #define elf_aarch64_tdata(bfd) \
2541 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2543 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2545 #define is_aarch64_elf(bfd) \
2546 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2547 && elf_tdata (bfd) != NULL \
2548 && elf_object_id (bfd) == AARCH64_ELF_DATA)
2551 elfNN_aarch64_mkobject (bfd
*abfd
)
2553 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_aarch64_obj_tdata
),
2557 #define elf_aarch64_hash_entry(ent) \
2558 ((struct elf_aarch64_link_hash_entry *)(ent))
2560 #define GOT_UNKNOWN 0
2561 #define GOT_NORMAL 1
2562 #define GOT_TLS_GD 2
2563 #define GOT_TLS_IE 4
2564 #define GOT_TLSDESC_GD 8
2566 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2568 /* AArch64 ELF linker hash entry. */
2569 struct elf_aarch64_link_hash_entry
2571 struct elf_link_hash_entry root
;
2573 /* Since PLT entries have variable size, we need to record the
2574 index into .got.plt instead of recomputing it from the PLT
2576 bfd_signed_vma plt_got_offset
;
2578 /* Bit mask representing the type of GOT entry(s) if any required by
2580 unsigned int got_type
;
2582 /* A pointer to the most recently used stub hash entry against this
2584 struct elf_aarch64_stub_hash_entry
*stub_cache
;
2586 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
2587 is from the end of the jump table and reserved entries within the PLTGOT.
2589 The magic value (bfd_vma) -1 indicates that an offset has not
2591 bfd_vma tlsdesc_got_jump_table_offset
;
2595 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry
*h
,
2597 unsigned long r_symndx
)
2600 return elf_aarch64_hash_entry (h
)->got_type
;
2602 if (! elf_aarch64_locals (abfd
))
2605 return elf_aarch64_locals (abfd
)[r_symndx
].got_type
;
2608 /* Get the AArch64 elf linker hash table from a link_info structure. */
2609 #define elf_aarch64_hash_table(info) \
2610 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
2612 #define aarch64_stub_hash_lookup(table, string, create, copy) \
2613 ((struct elf_aarch64_stub_hash_entry *) \
2614 bfd_hash_lookup ((table), (string), (create), (copy)))
2616 /* AArch64 ELF linker hash table. */
2617 struct elf_aarch64_link_hash_table
2619 /* The main hash table. */
2620 struct elf_link_hash_table root
;
2622 /* Nonzero to force PIC branch veneers. */
2625 /* Fix erratum 835769. */
2626 int fix_erratum_835769
;
2628 /* Fix erratum 843419. */
2629 erratum_84319_opts fix_erratum_843419
;
2631 /* Don't apply link-time values for dynamic relocations. */
2632 int no_apply_dynamic_relocs
;
2634 /* The number of bytes in the initial entry in the PLT. */
2635 bfd_size_type plt_header_size
;
2637 /* The bytes of the initial PLT entry. */
2638 const bfd_byte
*plt0_entry
;
2640 /* The number of bytes in the subsequent PLT entries. */
2641 bfd_size_type plt_entry_size
;
2643 /* The bytes of the subsequent PLT entry. */
2644 const bfd_byte
*plt_entry
;
2646 /* For convenience in allocate_dynrelocs. */
2649 /* The amount of space used by the reserved portion of the sgotplt
2650 section, plus whatever space is used by the jump slots. */
2651 bfd_vma sgotplt_jump_table_size
;
2653 /* The stub hash table. */
2654 struct bfd_hash_table stub_hash_table
;
2656 /* Linker stub bfd. */
2659 /* Linker call-backs. */
2660 asection
*(*add_stub_section
) (const char *, asection
*);
2661 void (*layout_sections_again
) (void);
2663 /* Array to keep track of which stub sections have been created, and
2664 information on stub grouping. */
2667 /* This is the section to which stubs in the group will be
2670 /* The stub section. */
2674 /* Assorted information used by elfNN_aarch64_size_stubs. */
2675 unsigned int bfd_count
;
2676 unsigned int top_index
;
2677 asection
**input_list
;
2679 /* JUMP_SLOT relocs for variant PCS symbols may be present. */
2682 /* The number of bytes in the PLT enty for the TLS descriptor. */
2683 bfd_size_type tlsdesc_plt_entry_size
;
2685 /* Used by local STT_GNU_IFUNC symbols. */
2686 htab_t loc_hash_table
;
2687 void * loc_hash_memory
;
2690 /* Create an entry in an AArch64 ELF linker hash table. */
2692 static struct bfd_hash_entry
*
2693 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
2694 struct bfd_hash_table
*table
,
2697 struct elf_aarch64_link_hash_entry
*ret
=
2698 (struct elf_aarch64_link_hash_entry
*) entry
;
2700 /* Allocate the structure if it has not already been allocated by a
2703 ret
= bfd_hash_allocate (table
,
2704 sizeof (struct elf_aarch64_link_hash_entry
));
2706 return (struct bfd_hash_entry
*) ret
;
2708 /* Call the allocation method of the superclass. */
2709 ret
= ((struct elf_aarch64_link_hash_entry
*)
2710 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2714 ret
->got_type
= GOT_UNKNOWN
;
2715 ret
->plt_got_offset
= (bfd_vma
) - 1;
2716 ret
->stub_cache
= NULL
;
2717 ret
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
2720 return (struct bfd_hash_entry
*) ret
;
2723 /* Initialize an entry in the stub hash table. */
2725 static struct bfd_hash_entry
*
2726 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2727 struct bfd_hash_table
*table
, const char *string
)
2729 /* Allocate the structure if it has not already been allocated by a
2733 entry
= bfd_hash_allocate (table
,
2735 elf_aarch64_stub_hash_entry
));
2740 /* Call the allocation method of the superclass. */
2741 entry
= bfd_hash_newfunc (entry
, table
, string
);
2744 struct elf_aarch64_stub_hash_entry
*eh
;
2746 /* Initialize the local fields. */
2747 eh
= (struct elf_aarch64_stub_hash_entry
*) entry
;
2748 eh
->adrp_offset
= 0;
2749 eh
->stub_sec
= NULL
;
2750 eh
->stub_offset
= 0;
2751 eh
->target_value
= 0;
2752 eh
->target_section
= NULL
;
2753 eh
->stub_type
= aarch64_stub_none
;
2761 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2762 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2763 as global symbol. We reuse indx and dynstr_index for local symbol
2764 hash since they aren't used by global symbols in this backend. */
2767 elfNN_aarch64_local_htab_hash (const void *ptr
)
2769 struct elf_link_hash_entry
*h
2770 = (struct elf_link_hash_entry
*) ptr
;
2771 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
2774 /* Compare local hash entries. */
2777 elfNN_aarch64_local_htab_eq (const void *ptr1
, const void *ptr2
)
2779 struct elf_link_hash_entry
*h1
2780 = (struct elf_link_hash_entry
*) ptr1
;
2781 struct elf_link_hash_entry
*h2
2782 = (struct elf_link_hash_entry
*) ptr2
;
2784 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
2787 /* Find and/or create a hash entry for local symbol. */
2789 static struct elf_link_hash_entry
*
2790 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table
*htab
,
2791 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
2794 struct elf_aarch64_link_hash_entry e
, *ret
;
2795 asection
*sec
= abfd
->sections
;
2796 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
2797 ELFNN_R_SYM (rel
->r_info
));
2800 e
.root
.indx
= sec
->id
;
2801 e
.root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2802 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
2803 create
? INSERT
: NO_INSERT
);
2810 ret
= (struct elf_aarch64_link_hash_entry
*) *slot
;
2814 ret
= (struct elf_aarch64_link_hash_entry
*)
2815 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
2816 sizeof (struct elf_aarch64_link_hash_entry
));
2819 memset (ret
, 0, sizeof (*ret
));
2820 ret
->root
.indx
= sec
->id
;
2821 ret
->root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2822 ret
->root
.dynindx
= -1;
2828 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2831 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info
*info
,
2832 struct elf_link_hash_entry
*dir
,
2833 struct elf_link_hash_entry
*ind
)
2835 struct elf_aarch64_link_hash_entry
*edir
, *eind
;
2837 edir
= (struct elf_aarch64_link_hash_entry
*) dir
;
2838 eind
= (struct elf_aarch64_link_hash_entry
*) ind
;
2840 if (ind
->root
.type
== bfd_link_hash_indirect
)
2842 /* Copy over PLT info. */
2843 if (dir
->got
.refcount
<= 0)
2845 edir
->got_type
= eind
->got_type
;
2846 eind
->got_type
= GOT_UNKNOWN
;
2850 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2853 /* Merge non-visibility st_other attributes. */
2856 elfNN_aarch64_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2857 unsigned int st_other
,
2858 bool definition ATTRIBUTE_UNUSED
,
2859 bool dynamic ATTRIBUTE_UNUSED
)
2861 unsigned int isym_sto
= st_other
& ~ELF_ST_VISIBILITY (-1);
2862 unsigned int h_sto
= h
->other
& ~ELF_ST_VISIBILITY (-1);
2864 if (isym_sto
== h_sto
)
2867 if (isym_sto
& ~STO_AARCH64_VARIANT_PCS
)
2868 /* Not fatal, this callback cannot fail. */
2869 _bfd_error_handler (_("unknown attribute for symbol `%s': 0x%02x"),
2870 h
->root
.root
.string
, isym_sto
);
2872 /* Note: Ideally we would warn about any attribute mismatch, but
2873 this api does not allow that without substantial changes. */
2874 if (isym_sto
& STO_AARCH64_VARIANT_PCS
)
2875 h
->other
|= STO_AARCH64_VARIANT_PCS
;
2878 /* Destroy an AArch64 elf linker hash table. */
2881 elfNN_aarch64_link_hash_table_free (bfd
*obfd
)
2883 struct elf_aarch64_link_hash_table
*ret
2884 = (struct elf_aarch64_link_hash_table
*) obfd
->link
.hash
;
2886 if (ret
->loc_hash_table
)
2887 htab_delete (ret
->loc_hash_table
);
2888 if (ret
->loc_hash_memory
)
2889 objalloc_free ((struct objalloc
*) ret
->loc_hash_memory
);
2891 bfd_hash_table_free (&ret
->stub_hash_table
);
2892 _bfd_elf_link_hash_table_free (obfd
);
2895 /* Create an AArch64 elf linker hash table. */
2897 static struct bfd_link_hash_table
*
2898 elfNN_aarch64_link_hash_table_create (bfd
*abfd
)
2900 struct elf_aarch64_link_hash_table
*ret
;
2901 size_t amt
= sizeof (struct elf_aarch64_link_hash_table
);
2903 ret
= bfd_zmalloc (amt
);
2907 if (!_bfd_elf_link_hash_table_init
2908 (&ret
->root
, abfd
, elfNN_aarch64_link_hash_newfunc
,
2909 sizeof (struct elf_aarch64_link_hash_entry
), AARCH64_ELF_DATA
))
2915 ret
->plt_header_size
= PLT_ENTRY_SIZE
;
2916 ret
->plt0_entry
= elfNN_aarch64_small_plt0_entry
;
2917 ret
->plt_entry_size
= PLT_SMALL_ENTRY_SIZE
;
2918 ret
->plt_entry
= elfNN_aarch64_small_plt_entry
;
2919 ret
->tlsdesc_plt_entry_size
= PLT_TLSDESC_ENTRY_SIZE
;
2921 ret
->root
.tlsdesc_got
= (bfd_vma
) - 1;
2923 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2924 sizeof (struct elf_aarch64_stub_hash_entry
)))
2926 _bfd_elf_link_hash_table_free (abfd
);
2930 ret
->loc_hash_table
= htab_try_create (1024,
2931 elfNN_aarch64_local_htab_hash
,
2932 elfNN_aarch64_local_htab_eq
,
2934 ret
->loc_hash_memory
= objalloc_create ();
2935 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
2937 elfNN_aarch64_link_hash_table_free (abfd
);
2940 ret
->root
.root
.hash_table_free
= elfNN_aarch64_link_hash_table_free
;
2942 return &ret
->root
.root
;
2945 /* Perform relocation R_TYPE. Returns TRUE upon success, FALSE otherwise. */
2948 aarch64_relocate (unsigned int r_type
, bfd
*input_bfd
, asection
*input_section
,
2949 bfd_vma offset
, bfd_vma value
)
2951 reloc_howto_type
*howto
;
2954 howto
= elfNN_aarch64_howto_from_type (input_bfd
, r_type
);
2955 place
= (input_section
->output_section
->vma
+ input_section
->output_offset
2958 r_type
= elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
2959 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, r_type
, place
,
2961 return _bfd_aarch64_elf_put_addend (input_bfd
,
2962 input_section
->contents
+ offset
, r_type
,
2963 howto
, value
) == bfd_reloc_ok
;
2966 static enum elf_aarch64_stub_type
2967 aarch64_select_branch_stub (bfd_vma value
, bfd_vma place
)
2969 if (aarch64_valid_for_adrp_p (value
, place
))
2970 return aarch64_stub_adrp_branch
;
2971 return aarch64_stub_long_branch
;
2974 /* Determine the type of stub needed, if any, for a call. */
2976 static enum elf_aarch64_stub_type
2977 aarch64_type_of_stub (asection
*input_sec
,
2978 const Elf_Internal_Rela
*rel
,
2980 unsigned char st_type
,
2981 bfd_vma destination
)
2984 bfd_signed_vma branch_offset
;
2985 unsigned int r_type
;
2986 enum elf_aarch64_stub_type stub_type
= aarch64_stub_none
;
2988 if (st_type
!= STT_FUNC
2989 && (sym_sec
== input_sec
))
2992 /* Determine where the call point is. */
2993 location
= (input_sec
->output_offset
2994 + input_sec
->output_section
->vma
+ rel
->r_offset
);
2996 branch_offset
= (bfd_signed_vma
) (destination
- location
);
2998 r_type
= ELFNN_R_TYPE (rel
->r_info
);
3000 /* We don't want to redirect any old unconditional jump in this way,
3001 only one which is being used for a sibcall, where it is
3002 acceptable for the IP0 and IP1 registers to be clobbered. */
3003 if ((r_type
== AARCH64_R (CALL26
) || r_type
== AARCH64_R (JUMP26
))
3004 && (branch_offset
> AARCH64_MAX_FWD_BRANCH_OFFSET
3005 || branch_offset
< AARCH64_MAX_BWD_BRANCH_OFFSET
))
3007 stub_type
= aarch64_stub_long_branch
;
3013 /* Build a name for an entry in the stub hash table. */
3016 elfNN_aarch64_stub_name (const asection
*input_section
,
3017 const asection
*sym_sec
,
3018 const struct elf_aarch64_link_hash_entry
*hash
,
3019 const Elf_Internal_Rela
*rel
)
3026 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 16 + 1;
3027 stub_name
= bfd_malloc (len
);
3028 if (stub_name
!= NULL
)
3029 snprintf (stub_name
, len
, "%08x_%s+%" BFD_VMA_FMT
"x",
3030 (unsigned int) input_section
->id
,
3031 hash
->root
.root
.root
.string
,
3036 len
= 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
3037 stub_name
= bfd_malloc (len
);
3038 if (stub_name
!= NULL
)
3039 snprintf (stub_name
, len
, "%08x_%x:%x+%" BFD_VMA_FMT
"x",
3040 (unsigned int) input_section
->id
,
3041 (unsigned int) sym_sec
->id
,
3042 (unsigned int) ELFNN_R_SYM (rel
->r_info
),
3049 /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For
3050 executable PLT slots where the executable never takes the address of those
3051 functions, the function symbols are not added to the hash table. */
3054 elf_aarch64_hash_symbol (struct elf_link_hash_entry
*h
)
3056 if (h
->plt
.offset
!= (bfd_vma
) -1
3058 && !h
->pointer_equality_needed
)
3061 return _bfd_elf_hash_symbol (h
);
3065 /* Look up an entry in the stub hash. Stub entries are cached because
3066 creating the stub name takes a bit of time. */
3068 static struct elf_aarch64_stub_hash_entry
*
3069 elfNN_aarch64_get_stub_entry (const asection
*input_section
,
3070 const asection
*sym_sec
,
3071 struct elf_link_hash_entry
*hash
,
3072 const Elf_Internal_Rela
*rel
,
3073 struct elf_aarch64_link_hash_table
*htab
)
3075 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3076 struct elf_aarch64_link_hash_entry
*h
=
3077 (struct elf_aarch64_link_hash_entry
*) hash
;
3078 const asection
*id_sec
;
3080 if ((input_section
->flags
& SEC_CODE
) == 0)
3083 /* If this input section is part of a group of sections sharing one
3084 stub section, then use the id of the first section in the group.
3085 Stub names need to include a section id, as there may well be
3086 more than one stub used to reach say, printf, and we need to
3087 distinguish between them. */
3088 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3090 if (h
!= NULL
&& h
->stub_cache
!= NULL
3091 && h
->stub_cache
->h
== h
&& h
->stub_cache
->id_sec
== id_sec
)
3093 stub_entry
= h
->stub_cache
;
3099 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, h
, rel
);
3100 if (stub_name
== NULL
)
3103 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
3104 stub_name
, false, false);
3106 h
->stub_cache
= stub_entry
;
3115 /* Create a stub section. */
3118 _bfd_aarch64_create_stub_section (asection
*section
,
3119 struct elf_aarch64_link_hash_table
*htab
)
3125 namelen
= strlen (section
->name
);
3126 len
= namelen
+ sizeof (STUB_SUFFIX
);
3127 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
3131 memcpy (s_name
, section
->name
, namelen
);
3132 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3133 return (*htab
->add_stub_section
) (s_name
, section
);
3137 /* Find or create a stub section for a link section.
3139 Fix or create the stub section used to collect stubs attached to
3140 the specified link section. */
3143 _bfd_aarch64_get_stub_for_link_section (asection
*link_section
,
3144 struct elf_aarch64_link_hash_table
*htab
)
3146 if (htab
->stub_group
[link_section
->id
].stub_sec
== NULL
)
3147 htab
->stub_group
[link_section
->id
].stub_sec
3148 = _bfd_aarch64_create_stub_section (link_section
, htab
);
3149 return htab
->stub_group
[link_section
->id
].stub_sec
;
3153 /* Find or create a stub section in the stub group for an input
3157 _bfd_aarch64_create_or_find_stub_sec (asection
*section
,
3158 struct elf_aarch64_link_hash_table
*htab
)
3160 asection
*link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3161 return _bfd_aarch64_get_stub_for_link_section (link_sec
, htab
);
3165 /* Add a new stub entry in the stub group associated with an input
3166 section to the stub hash. Not all fields of the new stub entry are
3169 static struct elf_aarch64_stub_hash_entry
*
3170 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name
,
3172 struct elf_aarch64_link_hash_table
*htab
)
3176 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3178 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3179 stub_sec
= _bfd_aarch64_create_or_find_stub_sec (section
, htab
);
3181 /* Enter this entry into the linker stub hash table. */
3182 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3184 if (stub_entry
== NULL
)
3186 /* xgettext:c-format */
3187 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
3188 section
->owner
, stub_name
);
3192 stub_entry
->stub_sec
= stub_sec
;
3193 stub_entry
->stub_offset
= 0;
3194 stub_entry
->id_sec
= link_sec
;
3199 /* Add a new stub entry in the final stub section to the stub hash.
3200 Not all fields of the new stub entry are initialised. */
3202 static struct elf_aarch64_stub_hash_entry
*
3203 _bfd_aarch64_add_stub_entry_after (const char *stub_name
,
3204 asection
*link_section
,
3205 struct elf_aarch64_link_hash_table
*htab
)
3208 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3211 /* Only create the actual stub if we will end up needing it. */
3212 if (htab
->fix_erratum_843419
& ERRAT_ADRP
)
3213 stub_sec
= _bfd_aarch64_get_stub_for_link_section (link_section
, htab
);
3214 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3216 if (stub_entry
== NULL
)
3218 _bfd_error_handler (_("cannot create stub entry %s"), stub_name
);
3222 stub_entry
->stub_sec
= stub_sec
;
3223 stub_entry
->stub_offset
= 0;
3224 stub_entry
->id_sec
= link_section
;
3231 aarch64_build_one_stub (struct bfd_hash_entry
*gen_entry
,
3234 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3239 bfd_vma veneered_insn_loc
;
3240 bfd_vma veneer_entry_loc
;
3241 bfd_signed_vma branch_offset
= 0;
3242 unsigned int template_size
;
3243 const uint32_t *template;
3245 struct bfd_link_info
*info
;
3247 /* Massage our args to the form they really have. */
3248 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
3250 info
= (struct bfd_link_info
*) in_arg
;
3252 /* Fail if the target section could not be assigned to an output
3253 section. The user should fix his linker script. */
3254 if (stub_entry
->target_section
->output_section
== NULL
3255 && info
->non_contiguous_regions
)
3256 info
->callbacks
->einfo (_("%F%P: Could not assign '%pA' to an output section. "
3258 "--enable-non-contiguous-regions.\n"),
3259 stub_entry
->target_section
);
3261 stub_sec
= stub_entry
->stub_sec
;
3263 /* Make a note of the offset within the stubs for this entry. */
3264 stub_entry
->stub_offset
= stub_sec
->size
;
3265 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
3267 stub_bfd
= stub_sec
->owner
;
3269 /* This is the address of the stub destination. */
3270 sym_value
= (stub_entry
->target_value
3271 + stub_entry
->target_section
->output_offset
3272 + stub_entry
->target_section
->output_section
->vma
);
3274 if (stub_entry
->stub_type
== aarch64_stub_long_branch
)
3276 bfd_vma place
= (stub_entry
->stub_offset
+ stub_sec
->output_section
->vma
3277 + stub_sec
->output_offset
);
3279 /* See if we can relax the stub. */
3280 if (aarch64_valid_for_adrp_p (sym_value
, place
))
3281 stub_entry
->stub_type
= aarch64_select_branch_stub (sym_value
, place
);
3284 switch (stub_entry
->stub_type
)
3286 case aarch64_stub_adrp_branch
:
3287 template = aarch64_adrp_branch_stub
;
3288 template_size
= sizeof (aarch64_adrp_branch_stub
);
3290 case aarch64_stub_long_branch
:
3291 template = aarch64_long_branch_stub
;
3292 template_size
= sizeof (aarch64_long_branch_stub
);
3294 case aarch64_stub_erratum_835769_veneer
:
3295 template = aarch64_erratum_835769_stub
;
3296 template_size
= sizeof (aarch64_erratum_835769_stub
);
3298 case aarch64_stub_erratum_843419_veneer
:
3299 template = aarch64_erratum_843419_stub
;
3300 template_size
= sizeof (aarch64_erratum_843419_stub
);
3306 for (i
= 0; i
< (template_size
/ sizeof template[0]); i
++)
3308 bfd_putl32 (template[i
], loc
);
3312 template_size
= (template_size
+ 7) & ~7;
3313 stub_sec
->size
+= template_size
;
3315 switch (stub_entry
->stub_type
)
3317 case aarch64_stub_adrp_branch
:
3318 if (!aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21
), stub_bfd
, stub_sec
,
3319 stub_entry
->stub_offset
, sym_value
))
3320 /* The stub would not have been relaxed if the offset was out
3324 if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC
), stub_bfd
, stub_sec
,
3325 stub_entry
->stub_offset
+ 4, sym_value
))
3329 case aarch64_stub_long_branch
:
3330 /* We want the value relative to the address 12 bytes back from the
3332 if (!aarch64_relocate (AARCH64_R (PRELNN
), stub_bfd
, stub_sec
,
3333 stub_entry
->stub_offset
+ 16, sym_value
+ 12))
3337 case aarch64_stub_erratum_835769_veneer
:
3338 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
3339 + stub_entry
->target_section
->output_offset
3340 + stub_entry
->target_value
;
3341 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
3342 + stub_entry
->stub_sec
->output_offset
3343 + stub_entry
->stub_offset
;
3344 branch_offset
= veneered_insn_loc
- veneer_entry_loc
;
3345 branch_offset
>>= 2;
3346 branch_offset
&= 0x3ffffff;
3347 bfd_putl32 (stub_entry
->veneered_insn
,
3348 stub_sec
->contents
+ stub_entry
->stub_offset
);
3349 bfd_putl32 (template[1] | branch_offset
,
3350 stub_sec
->contents
+ stub_entry
->stub_offset
+ 4);
3353 case aarch64_stub_erratum_843419_veneer
:
3354 if (!aarch64_relocate (AARCH64_R (JUMP26
), stub_bfd
, stub_sec
,
3355 stub_entry
->stub_offset
+ 4, sym_value
+ 4))
3366 /* As above, but don't actually build the stub. Just bump offset so
3367 we know stub section sizes. */
3370 aarch64_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
3372 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3373 struct elf_aarch64_link_hash_table
*htab
;
3376 /* Massage our args to the form they really have. */
3377 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
3378 htab
= (struct elf_aarch64_link_hash_table
*) in_arg
;
3380 switch (stub_entry
->stub_type
)
3382 case aarch64_stub_adrp_branch
:
3383 size
= sizeof (aarch64_adrp_branch_stub
);
3385 case aarch64_stub_long_branch
:
3386 size
= sizeof (aarch64_long_branch_stub
);
3388 case aarch64_stub_erratum_835769_veneer
:
3389 size
= sizeof (aarch64_erratum_835769_stub
);
3391 case aarch64_stub_erratum_843419_veneer
:
3393 if (htab
->fix_erratum_843419
== ERRAT_ADR
)
3395 size
= sizeof (aarch64_erratum_843419_stub
);
3402 size
= (size
+ 7) & ~7;
3403 stub_entry
->stub_sec
->size
+= size
;
3407 /* External entry points for sizing and building linker stubs. */
3409 /* Set up various things so that we can make a list of input sections
3410 for each output section included in the link. Returns -1 on error,
3411 0 when no stubs will be needed, and 1 on success. */
3414 elfNN_aarch64_setup_section_lists (bfd
*output_bfd
,
3415 struct bfd_link_info
*info
)
3418 unsigned int bfd_count
;
3419 unsigned int top_id
, top_index
;
3421 asection
**input_list
, **list
;
3423 struct elf_aarch64_link_hash_table
*htab
=
3424 elf_aarch64_hash_table (info
);
3426 if (!is_elf_hash_table (&htab
->root
.root
))
3429 /* Count the number of input BFDs and find the top input section id. */
3430 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3431 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3434 for (section
= input_bfd
->sections
;
3435 section
!= NULL
; section
= section
->next
)
3437 if (top_id
< section
->id
)
3438 top_id
= section
->id
;
3441 htab
->bfd_count
= bfd_count
;
3443 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3444 htab
->stub_group
= bfd_zmalloc (amt
);
3445 if (htab
->stub_group
== NULL
)
3448 /* We can't use output_bfd->section_count here to find the top output
3449 section index as some sections may have been removed, and
3450 _bfd_strip_section_from_output doesn't renumber the indices. */
3451 for (section
= output_bfd
->sections
, top_index
= 0;
3452 section
!= NULL
; section
= section
->next
)
3454 if (top_index
< section
->index
)
3455 top_index
= section
->index
;
3458 htab
->top_index
= top_index
;
3459 amt
= sizeof (asection
*) * (top_index
+ 1);
3460 input_list
= bfd_malloc (amt
);
3461 htab
->input_list
= input_list
;
3462 if (input_list
== NULL
)
3465 /* For sections we aren't interested in, mark their entries with a
3466 value we can check later. */
3467 list
= input_list
+ top_index
;
3469 *list
= bfd_abs_section_ptr
;
3470 while (list
-- != input_list
);
3472 for (section
= output_bfd
->sections
;
3473 section
!= NULL
; section
= section
->next
)
3475 if ((section
->flags
& SEC_CODE
) != 0)
3476 input_list
[section
->index
] = NULL
;
3482 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3483 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3485 /* The linker repeatedly calls this function for each input section,
3486 in the order that input sections are linked into output sections.
3487 Build lists of input sections to determine groupings between which
3488 we may insert linker stubs. */
3491 elfNN_aarch64_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3493 struct elf_aarch64_link_hash_table
*htab
=
3494 elf_aarch64_hash_table (info
);
3496 if (isec
->output_section
->index
<= htab
->top_index
)
3498 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3500 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
3502 /* Steal the link_sec pointer for our list. */
3503 /* This happens to make the list in reverse order,
3504 which is what we want. */
3505 PREV_SEC (isec
) = *list
;
3511 /* See whether we can group stub sections together. Grouping stub
3512 sections may result in fewer stubs. More importantly, we need to
3513 put all .init* and .fini* stubs at the beginning of the .init or
3514 .fini output sections respectively, because glibc splits the
3515 _init and _fini functions into multiple parts. Putting a stub in
3516 the middle of a function is not a good idea. */
3519 group_sections (struct elf_aarch64_link_hash_table
*htab
,
3520 bfd_size_type stub_group_size
,
3521 bool stubs_always_after_branch
)
3523 asection
**list
= htab
->input_list
;
3527 asection
*tail
= *list
;
3530 if (tail
== bfd_abs_section_ptr
)
3533 /* Reverse the list: we must avoid placing stubs at the
3534 beginning of the section because the beginning of the text
3535 section may be required for an interrupt vector in bare metal
3537 #define NEXT_SEC PREV_SEC
3539 while (tail
!= NULL
)
3541 /* Pop from tail. */
3542 asection
*item
= tail
;
3543 tail
= PREV_SEC (item
);
3546 NEXT_SEC (item
) = head
;
3550 while (head
!= NULL
)
3554 bfd_vma stub_group_start
= head
->output_offset
;
3555 bfd_vma end_of_next
;
3558 while (NEXT_SEC (curr
) != NULL
)
3560 next
= NEXT_SEC (curr
);
3561 end_of_next
= next
->output_offset
+ next
->size
;
3562 if (end_of_next
- stub_group_start
>= stub_group_size
)
3563 /* End of NEXT is too far from start, so stop. */
3565 /* Add NEXT to the group. */
3569 /* OK, the size from the start to the start of CURR is less
3570 than stub_group_size and thus can be handled by one stub
3571 section. (Or the head section is itself larger than
3572 stub_group_size, in which case we may be toast.)
3573 We should really be keeping track of the total size of
3574 stubs added here, as stubs contribute to the final output
3578 next
= NEXT_SEC (head
);
3579 /* Set up this stub group. */
3580 htab
->stub_group
[head
->id
].link_sec
= curr
;
3582 while (head
!= curr
&& (head
= next
) != NULL
);
3584 /* But wait, there's more! Input sections up to stub_group_size
3585 bytes after the stub section can be handled by it too. */
3586 if (!stubs_always_after_branch
)
3588 stub_group_start
= curr
->output_offset
+ curr
->size
;
3590 while (next
!= NULL
)
3592 end_of_next
= next
->output_offset
+ next
->size
;
3593 if (end_of_next
- stub_group_start
>= stub_group_size
)
3594 /* End of NEXT is too far from stubs, so stop. */
3596 /* Add NEXT to the stub group. */
3598 next
= NEXT_SEC (head
);
3599 htab
->stub_group
[head
->id
].link_sec
= curr
;
3605 while (list
++ != htab
->input_list
+ htab
->top_index
);
3607 free (htab
->input_list
);
3613 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3615 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
3616 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
3617 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
3618 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
3619 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
3620 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
3622 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
3623 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
3624 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
3625 #define AARCH64_ZR 0x1f
3627 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
3628 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
3630 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
3631 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
3632 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
3633 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
3634 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
3635 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
3636 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
3637 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
3638 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
3639 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
3640 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
3641 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
3642 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
3643 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
3644 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
3645 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
3646 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
3647 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
3649 /* Classify an INSN if it is indeed a load/store.
3651 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3653 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3656 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */
3659 aarch64_mem_op_p (uint32_t insn
, unsigned int *rt
, unsigned int *rt2
,
3660 bool *pair
, bool *load
)
3668 /* Bail out quickly if INSN doesn't fall into the load-store
3670 if (!AARCH64_LDST (insn
))
3675 if (AARCH64_LDST_EX (insn
))
3677 *rt
= AARCH64_RT (insn
);
3679 if (AARCH64_BIT (insn
, 21) == 1)
3682 *rt2
= AARCH64_RT2 (insn
);
3684 *load
= AARCH64_LD (insn
);
3687 else if (AARCH64_LDST_NAP (insn
)
3688 || AARCH64_LDSTP_PI (insn
)
3689 || AARCH64_LDSTP_O (insn
)
3690 || AARCH64_LDSTP_PRE (insn
))
3693 *rt
= AARCH64_RT (insn
);
3694 *rt2
= AARCH64_RT2 (insn
);
3695 *load
= AARCH64_LD (insn
);
3698 else if (AARCH64_LDST_PCREL (insn
)
3699 || AARCH64_LDST_UI (insn
)
3700 || AARCH64_LDST_PIIMM (insn
)
3701 || AARCH64_LDST_U (insn
)
3702 || AARCH64_LDST_PREIMM (insn
)
3703 || AARCH64_LDST_RO (insn
)
3704 || AARCH64_LDST_UIMM (insn
))
3706 *rt
= AARCH64_RT (insn
);
3708 if (AARCH64_LDST_PCREL (insn
))
3710 opc
= AARCH64_BITS (insn
, 22, 2);
3711 v
= AARCH64_BIT (insn
, 26);
3712 opc_v
= opc
| (v
<< 2);
3713 *load
= (opc_v
== 1 || opc_v
== 2 || opc_v
== 3
3714 || opc_v
== 5 || opc_v
== 7);
3717 else if (AARCH64_LDST_SIMD_M (insn
)
3718 || AARCH64_LDST_SIMD_M_PI (insn
))
3720 *rt
= AARCH64_RT (insn
);
3721 *load
= AARCH64_BIT (insn
, 22);
3722 opcode
= (insn
>> 12) & 0xf;
3749 else if (AARCH64_LDST_SIMD_S (insn
)
3750 || AARCH64_LDST_SIMD_S_PI (insn
))
3752 *rt
= AARCH64_RT (insn
);
3753 r
= (insn
>> 21) & 1;
3754 *load
= AARCH64_BIT (insn
, 22);
3755 opcode
= (insn
>> 13) & 0x7;
3767 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3775 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3787 /* Return TRUE if INSN is multiply-accumulate. */
3790 aarch64_mlxl_p (uint32_t insn
)
3792 uint32_t op31
= AARCH64_OP31 (insn
);
3794 if (AARCH64_MAC (insn
)
3795 && (op31
== 0 || op31
== 1 || op31
== 5)
3796 /* Exclude MUL instructions which are encoded as a multiple accumulate
3798 && AARCH64_RA (insn
) != AARCH64_ZR
)
3804 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3805 it is possible for a 64-bit multiply-accumulate instruction to generate an
3806 incorrect result. The details are quite complex and hard to
3807 determine statically, since branches in the code may exist in some
3808 circumstances, but all cases end with a memory (load, store, or
3809 prefetch) instruction followed immediately by the multiply-accumulate
3810 operation. We employ a linker patching technique, by moving the potentially
3811 affected multiply-accumulate instruction into a patch region and replacing
3812 the original instruction with a branch to the patch. This function checks
3813 if INSN_1 is the memory operation followed by a multiply-accumulate
3814 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3815 if INSN_1 and INSN_2 are safe. */
3818 aarch64_erratum_sequence (uint32_t insn_1
, uint32_t insn_2
)
3828 if (aarch64_mlxl_p (insn_2
)
3829 && aarch64_mem_op_p (insn_1
, &rt
, &rt2
, &pair
, &load
))
3831 /* Any SIMD memory op is independent of the subsequent MLA
3832 by definition of the erratum. */
3833 if (AARCH64_BIT (insn_1
, 26))
3836 /* If not SIMD, check for integer memory ops and MLA relationship. */
3837 rn
= AARCH64_RN (insn_2
);
3838 ra
= AARCH64_RA (insn_2
);
3839 rm
= AARCH64_RM (insn_2
);
3841 /* If this is a load and there's a true(RAW) dependency, we are safe
3842 and this is not an erratum sequence. */
3844 (rt
== rn
|| rt
== rm
|| rt
== ra
3845 || (pair
&& (rt2
== rn
|| rt2
== rm
|| rt2
== ra
))))
3848 /* We conservatively put out stubs for all other cases (including
3856 /* Used to order a list of mapping symbols by address. */
3859 elf_aarch64_compare_mapping (const void *a
, const void *b
)
3861 const elf_aarch64_section_map
*amap
= (const elf_aarch64_section_map
*) a
;
3862 const elf_aarch64_section_map
*bmap
= (const elf_aarch64_section_map
*) b
;
3864 if (amap
->vma
> bmap
->vma
)
3866 else if (amap
->vma
< bmap
->vma
)
3868 else if (amap
->type
> bmap
->type
)
3869 /* Ensure results do not depend on the host qsort for objects with
3870 multiple mapping symbols at the same address by sorting on type
3873 else if (amap
->type
< bmap
->type
)
3881 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes
)
3883 char *stub_name
= (char *) bfd_malloc
3884 (strlen ("__erratum_835769_veneer_") + 16);
3885 if (stub_name
!= NULL
)
3886 sprintf (stub_name
,"__erratum_835769_veneer_%d", num_fixes
);
3890 /* Scan for Cortex-A53 erratum 835769 sequence.
3892 Return TRUE else FALSE on abnormal termination. */
3895 _bfd_aarch64_erratum_835769_scan (bfd
*input_bfd
,
3896 struct bfd_link_info
*info
,
3897 unsigned int *num_fixes_p
)
3900 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3901 unsigned int num_fixes
= *num_fixes_p
;
3906 for (section
= input_bfd
->sections
;
3908 section
= section
->next
)
3910 bfd_byte
*contents
= NULL
;
3911 struct _aarch64_elf_section_data
*sec_data
;
3914 if (elf_section_type (section
) != SHT_PROGBITS
3915 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3916 || (section
->flags
& SEC_EXCLUDE
) != 0
3917 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3918 || (section
->output_section
== bfd_abs_section_ptr
))
3921 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3922 contents
= elf_section_data (section
)->this_hdr
.contents
;
3923 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3926 sec_data
= elf_aarch64_section_data (section
);
3928 if (sec_data
->mapcount
)
3929 qsort (sec_data
->map
, sec_data
->mapcount
,
3930 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3932 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3934 unsigned int span_start
= sec_data
->map
[span
].vma
;
3935 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3936 ? sec_data
->map
[0].vma
+ section
->size
3937 : sec_data
->map
[span
+ 1].vma
);
3939 char span_type
= sec_data
->map
[span
].type
;
3941 if (span_type
== 'd')
3944 for (i
= span_start
; i
+ 4 < span_end
; i
+= 4)
3946 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3947 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3949 if (aarch64_erratum_sequence (insn_1
, insn_2
))
3951 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3952 char *stub_name
= _bfd_aarch64_erratum_835769_stub_name (num_fixes
);
3956 stub_entry
= _bfd_aarch64_add_stub_entry_in_group (stub_name
,
3962 stub_entry
->stub_type
= aarch64_stub_erratum_835769_veneer
;
3963 stub_entry
->target_section
= section
;
3964 stub_entry
->target_value
= i
+ 4;
3965 stub_entry
->veneered_insn
= insn_2
;
3966 stub_entry
->output_name
= stub_name
;
3971 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3975 *num_fixes_p
= num_fixes
;
3981 /* Test if instruction INSN is ADRP. */
3984 _bfd_aarch64_adrp_p (uint32_t insn
)
3986 return ((insn
& AARCH64_ADRP_OP_MASK
) == AARCH64_ADRP_OP
);
3990 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3993 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1
, uint32_t insn_2
,
4001 return (aarch64_mem_op_p (insn_2
, &rt
, &rt2
, &pair
, &load
)
4004 && AARCH64_LDST_UIMM (insn_3
)
4005 && AARCH64_RN (insn_3
) == AARCH64_RD (insn_1
));
4009 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
4011 Return TRUE if section CONTENTS at offset I contains one of the
4012 erratum 843419 sequences, otherwise return FALSE. If a sequence is
4013 seen set P_VENEER_I to the offset of the final LOAD/STORE
4014 instruction in the sequence.
4018 _bfd_aarch64_erratum_843419_p (bfd_byte
*contents
, bfd_vma vma
,
4019 bfd_vma i
, bfd_vma span_end
,
4020 bfd_vma
*p_veneer_i
)
4022 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
4024 if (!_bfd_aarch64_adrp_p (insn_1
))
4027 if (span_end
< i
+ 12)
4030 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
4031 uint32_t insn_3
= bfd_getl32 (contents
+ i
+ 8);
4033 if ((vma
& 0xfff) != 0xff8 && (vma
& 0xfff) != 0xffc)
4036 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_3
))
4038 *p_veneer_i
= i
+ 8;
4042 if (span_end
< i
+ 16)
4045 uint32_t insn_4
= bfd_getl32 (contents
+ i
+ 12);
4047 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_4
))
4049 *p_veneer_i
= i
+ 12;
4057 /* Resize all stub sections. */
4060 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table
*htab
)
4064 /* OK, we've added some stubs. Find out the new size of the
4066 for (section
= htab
->stub_bfd
->sections
;
4067 section
!= NULL
; section
= section
->next
)
4069 /* Ignore non-stub sections. */
4070 if (!strstr (section
->name
, STUB_SUFFIX
))
4075 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_size_one_stub
, htab
);
4077 for (section
= htab
->stub_bfd
->sections
;
4078 section
!= NULL
; section
= section
->next
)
4080 if (!strstr (section
->name
, STUB_SUFFIX
))
4083 /* Add space for a branch. Add 8 bytes to keep section 8 byte aligned,
4084 as long branch stubs contain a 64-bit address. */
4088 /* Ensure all stub sections have a size which is a multiple of
4089 4096. This is important in order to ensure that the insertion
4090 of stub sections does not in itself move existing code around
4091 in such a way that new errata sequences are created. We only do this
4092 when the ADRP workaround is enabled. If only the ADR workaround is
4093 enabled then the stubs workaround won't ever be used. */
4094 if (htab
->fix_erratum_843419
& ERRAT_ADRP
)
4096 section
->size
= BFD_ALIGN (section
->size
, 0x1000);
4100 /* Construct an erratum 843419 workaround stub name. */
4103 _bfd_aarch64_erratum_843419_stub_name (asection
*input_section
,
4106 const bfd_size_type len
= 8 + 4 + 1 + 8 + 1 + 16 + 1;
4107 char *stub_name
= bfd_malloc (len
);
4109 if (stub_name
!= NULL
)
4110 snprintf (stub_name
, len
, "e843419@%04x_%08x_%" BFD_VMA_FMT
"x",
4111 input_section
->owner
->id
,
4117 /* Build a stub_entry structure describing an 843419 fixup.
4119 The stub_entry constructed is populated with the bit pattern INSN
4120 of the instruction located at OFFSET within input SECTION.
4122 Returns TRUE on success. */
4125 _bfd_aarch64_erratum_843419_fixup (uint32_t insn
,
4126 bfd_vma adrp_offset
,
4127 bfd_vma ldst_offset
,
4129 struct bfd_link_info
*info
)
4131 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
4133 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4135 stub_name
= _bfd_aarch64_erratum_843419_stub_name (section
, ldst_offset
);
4136 if (stub_name
== NULL
)
4138 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
4146 /* We always place an 843419 workaround veneer in the stub section
4147 attached to the input section in which an erratum sequence has
4148 been found. This ensures that later in the link process (in
4149 elfNN_aarch64_write_section) when we copy the veneered
4150 instruction from the input section into the stub section the
4151 copied instruction will have had any relocations applied to it.
4152 If we placed workaround veneers in any other stub section then we
4153 could not assume that all relocations have been processed on the
4154 corresponding input section at the point we output the stub
4157 stub_entry
= _bfd_aarch64_add_stub_entry_after (stub_name
, section
, htab
);
4158 if (stub_entry
== NULL
)
4164 stub_entry
->adrp_offset
= adrp_offset
;
4165 stub_entry
->target_value
= ldst_offset
;
4166 stub_entry
->target_section
= section
;
4167 stub_entry
->stub_type
= aarch64_stub_erratum_843419_veneer
;
4168 stub_entry
->veneered_insn
= insn
;
4169 stub_entry
->output_name
= stub_name
;
4175 /* Scan an input section looking for the signature of erratum 843419.
4177 Scans input SECTION in INPUT_BFD looking for erratum 843419
4178 signatures, for each signature found a stub_entry is created
4179 describing the location of the erratum for subsequent fixup.
4181 Return TRUE on successful scan, FALSE on failure to scan.
4185 _bfd_aarch64_erratum_843419_scan (bfd
*input_bfd
, asection
*section
,
4186 struct bfd_link_info
*info
)
4188 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
4193 if (elf_section_type (section
) != SHT_PROGBITS
4194 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
4195 || (section
->flags
& SEC_EXCLUDE
) != 0
4196 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4197 || (section
->output_section
== bfd_abs_section_ptr
))
4202 bfd_byte
*contents
= NULL
;
4203 struct _aarch64_elf_section_data
*sec_data
;
4206 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
4207 contents
= elf_section_data (section
)->this_hdr
.contents
;
4208 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
4211 sec_data
= elf_aarch64_section_data (section
);
4213 if (sec_data
->mapcount
)
4214 qsort (sec_data
->map
, sec_data
->mapcount
,
4215 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
4217 for (span
= 0; span
< sec_data
->mapcount
; span
++)
4219 unsigned int span_start
= sec_data
->map
[span
].vma
;
4220 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
4221 ? sec_data
->map
[0].vma
+ section
->size
4222 : sec_data
->map
[span
+ 1].vma
);
4224 char span_type
= sec_data
->map
[span
].type
;
4226 if (span_type
== 'd')
4229 for (i
= span_start
; i
+ 8 < span_end
; i
+= 4)
4231 bfd_vma vma
= (section
->output_section
->vma
4232 + section
->output_offset
4236 if (_bfd_aarch64_erratum_843419_p
4237 (contents
, vma
, i
, span_end
, &veneer_i
))
4239 uint32_t insn
= bfd_getl32 (contents
+ veneer_i
);
4241 if (!_bfd_aarch64_erratum_843419_fixup (insn
, i
, veneer_i
,
4248 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4257 /* Determine and set the size of the stub section for a final link.
4259 The basic idea here is to examine all the relocations looking for
4260 PC-relative calls to a target that is unreachable with a "bl"
4264 elfNN_aarch64_size_stubs (bfd
*output_bfd
,
4266 struct bfd_link_info
*info
,
4267 bfd_signed_vma group_size
,
4268 asection
* (*add_stub_section
) (const char *,
4270 void (*layout_sections_again
) (void))
4272 bfd_size_type stub_group_size
;
4273 bool stubs_always_before_branch
;
4274 bool stub_changed
= false;
4275 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
4276 unsigned int num_erratum_835769_fixes
= 0;
4278 /* Propagate mach to stub bfd, because it may not have been
4279 finalized when we created stub_bfd. */
4280 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4281 bfd_get_mach (output_bfd
));
4283 /* Stash our params away. */
4284 htab
->stub_bfd
= stub_bfd
;
4285 htab
->add_stub_section
= add_stub_section
;
4286 htab
->layout_sections_again
= layout_sections_again
;
4287 stubs_always_before_branch
= group_size
< 0;
4289 stub_group_size
= -group_size
;
4291 stub_group_size
= group_size
;
4293 if (stub_group_size
== 1)
4295 /* Default values. */
4296 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
4297 stub_group_size
= 127 * 1024 * 1024;
4300 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
4302 (*htab
->layout_sections_again
) ();
4304 if (htab
->fix_erratum_835769
)
4308 for (input_bfd
= info
->input_bfds
;
4309 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
4311 if (!is_aarch64_elf (input_bfd
)
4312 || (input_bfd
->flags
& BFD_LINKER_CREATED
) != 0)
4315 if (!_bfd_aarch64_erratum_835769_scan (input_bfd
, info
,
4316 &num_erratum_835769_fixes
))
4320 _bfd_aarch64_resize_stubs (htab
);
4321 (*htab
->layout_sections_again
) ();
4324 if (htab
->fix_erratum_843419
!= ERRAT_NONE
)
4328 for (input_bfd
= info
->input_bfds
;
4330 input_bfd
= input_bfd
->link
.next
)
4334 if (!is_aarch64_elf (input_bfd
)
4335 || (input_bfd
->flags
& BFD_LINKER_CREATED
) != 0)
4338 for (section
= input_bfd
->sections
;
4340 section
= section
->next
)
4341 if (!_bfd_aarch64_erratum_843419_scan (input_bfd
, section
, info
))
4345 _bfd_aarch64_resize_stubs (htab
);
4346 (*htab
->layout_sections_again
) ();
4353 for (input_bfd
= info
->input_bfds
;
4354 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
4356 Elf_Internal_Shdr
*symtab_hdr
;
4358 Elf_Internal_Sym
*local_syms
= NULL
;
4360 if (!is_aarch64_elf (input_bfd
)
4361 || (input_bfd
->flags
& BFD_LINKER_CREATED
) != 0)
4364 /* We'll need the symbol table in a second. */
4365 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4366 if (symtab_hdr
->sh_info
== 0)
4369 /* Walk over each section attached to the input bfd. */
4370 for (section
= input_bfd
->sections
;
4371 section
!= NULL
; section
= section
->next
)
4373 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4375 /* If there aren't any relocs, then there's nothing more
4377 if ((section
->flags
& SEC_RELOC
) == 0
4378 || section
->reloc_count
== 0
4379 || (section
->flags
& SEC_CODE
) == 0)
4382 /* If this section is a link-once section that will be
4383 discarded, then don't create any stubs. */
4384 if (section
->output_section
== NULL
4385 || section
->output_section
->owner
!= output_bfd
)
4388 /* Get the relocs. */
4390 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
4391 NULL
, info
->keep_memory
);
4392 if (internal_relocs
== NULL
)
4393 goto error_ret_free_local
;
4395 /* Now examine each relocation. */
4396 irela
= internal_relocs
;
4397 irelaend
= irela
+ section
->reloc_count
;
4398 for (; irela
< irelaend
; irela
++)
4400 unsigned int r_type
, r_indx
;
4401 enum elf_aarch64_stub_type stub_type
;
4402 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4405 bfd_vma destination
;
4406 struct elf_aarch64_link_hash_entry
*hash
;
4407 const char *sym_name
;
4409 const asection
*id_sec
;
4410 unsigned char st_type
;
4413 r_type
= ELFNN_R_TYPE (irela
->r_info
);
4414 r_indx
= ELFNN_R_SYM (irela
->r_info
);
4416 if (r_type
>= (unsigned int) R_AARCH64_end
)
4418 bfd_set_error (bfd_error_bad_value
);
4419 error_ret_free_internal
:
4420 if (elf_section_data (section
)->relocs
== NULL
)
4421 free (internal_relocs
);
4422 goto error_ret_free_local
;
4425 /* Only look for stubs on unconditional branch and
4426 branch and link instructions. */
4427 if (r_type
!= (unsigned int) AARCH64_R (CALL26
)
4428 && r_type
!= (unsigned int) AARCH64_R (JUMP26
))
4431 /* Now determine the call target, its name, value,
4438 if (r_indx
< symtab_hdr
->sh_info
)
4440 /* It's a local symbol. */
4441 Elf_Internal_Sym
*sym
;
4442 Elf_Internal_Shdr
*hdr
;
4444 if (local_syms
== NULL
)
4447 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4448 if (local_syms
== NULL
)
4450 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4451 symtab_hdr
->sh_info
, 0,
4453 if (local_syms
== NULL
)
4454 goto error_ret_free_internal
;
4457 sym
= local_syms
+ r_indx
;
4458 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4459 sym_sec
= hdr
->bfd_section
;
4461 /* This is an undefined symbol. It can never
4465 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4466 sym_value
= sym
->st_value
;
4467 destination
= (sym_value
+ irela
->r_addend
4468 + sym_sec
->output_offset
4469 + sym_sec
->output_section
->vma
);
4470 st_type
= ELF_ST_TYPE (sym
->st_info
);
4472 = bfd_elf_string_from_elf_section (input_bfd
,
4473 symtab_hdr
->sh_link
,
4480 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4481 hash
= ((struct elf_aarch64_link_hash_entry
*)
4482 elf_sym_hashes (input_bfd
)[e_indx
]);
4484 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4485 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4486 hash
= ((struct elf_aarch64_link_hash_entry
*)
4487 hash
->root
.root
.u
.i
.link
);
4489 if (hash
->root
.root
.type
== bfd_link_hash_defined
4490 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4492 struct elf_aarch64_link_hash_table
*globals
=
4493 elf_aarch64_hash_table (info
);
4494 sym_sec
= hash
->root
.root
.u
.def
.section
;
4495 sym_value
= hash
->root
.root
.u
.def
.value
;
4496 /* For a destination in a shared library,
4497 use the PLT stub as target address to
4498 decide whether a branch stub is
4500 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4501 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4503 sym_sec
= globals
->root
.splt
;
4504 sym_value
= hash
->root
.plt
.offset
;
4505 if (sym_sec
->output_section
!= NULL
)
4506 destination
= (sym_value
4507 + sym_sec
->output_offset
4509 sym_sec
->output_section
->vma
);
4511 else if (sym_sec
->output_section
!= NULL
)
4512 destination
= (sym_value
+ irela
->r_addend
4513 + sym_sec
->output_offset
4514 + sym_sec
->output_section
->vma
);
4516 else if (hash
->root
.root
.type
== bfd_link_hash_undefined
4517 || (hash
->root
.root
.type
4518 == bfd_link_hash_undefweak
))
4520 /* For a shared library, use the PLT stub as
4521 target address to decide whether a long
4522 branch stub is needed.
4523 For absolute code, they cannot be handled. */
4524 struct elf_aarch64_link_hash_table
*globals
=
4525 elf_aarch64_hash_table (info
);
4527 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4528 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4530 sym_sec
= globals
->root
.splt
;
4531 sym_value
= hash
->root
.plt
.offset
;
4532 if (sym_sec
->output_section
!= NULL
)
4533 destination
= (sym_value
4534 + sym_sec
->output_offset
4536 sym_sec
->output_section
->vma
);
4543 bfd_set_error (bfd_error_bad_value
);
4544 goto error_ret_free_internal
;
4546 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4547 sym_name
= hash
->root
.root
.root
.string
;
4550 /* Determine what (if any) linker stub is needed. */
4551 stub_type
= aarch64_type_of_stub (section
, irela
, sym_sec
,
4552 st_type
, destination
);
4553 if (stub_type
== aarch64_stub_none
)
4556 /* Support for grouping stub sections. */
4557 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4559 /* Get the name of this stub. */
4560 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, hash
,
4563 goto error_ret_free_internal
;
4566 aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
4567 stub_name
, false, false);
4568 if (stub_entry
!= NULL
)
4570 /* The proper stub has already been created. */
4572 /* Always update this stub's target since it may have
4573 changed after layout. */
4574 stub_entry
->target_value
= sym_value
+ irela
->r_addend
;
4578 stub_entry
= _bfd_aarch64_add_stub_entry_in_group
4579 (stub_name
, section
, htab
);
4580 if (stub_entry
== NULL
)
4583 goto error_ret_free_internal
;
4586 stub_entry
->target_value
= sym_value
+ irela
->r_addend
;
4587 stub_entry
->target_section
= sym_sec
;
4588 stub_entry
->stub_type
= stub_type
;
4589 stub_entry
->h
= hash
;
4590 stub_entry
->st_type
= st_type
;
4592 if (sym_name
== NULL
)
4593 sym_name
= "unnamed";
4594 len
= sizeof (STUB_ENTRY_NAME
) + strlen (sym_name
);
4595 stub_entry
->output_name
= bfd_alloc (htab
->stub_bfd
, len
);
4596 if (stub_entry
->output_name
== NULL
)
4599 goto error_ret_free_internal
;
4602 snprintf (stub_entry
->output_name
, len
, STUB_ENTRY_NAME
,
4605 stub_changed
= true;
4608 /* We're done with the internal relocs, free them. */
4609 if (elf_section_data (section
)->relocs
== NULL
)
4610 free (internal_relocs
);
4617 _bfd_aarch64_resize_stubs (htab
);
4619 /* Ask the linker to do its stuff. */
4620 (*htab
->layout_sections_again
) ();
4621 stub_changed
= false;
4626 error_ret_free_local
:
4630 /* Build all the stubs associated with the current output file. The
4631 stubs are kept in a hash table attached to the main linker hash
4632 table. We also set up the .plt entries for statically linked PIC
4633 functions here. This function is called via aarch64_elf_finish in the
4637 elfNN_aarch64_build_stubs (struct bfd_link_info
*info
)
4640 struct bfd_hash_table
*table
;
4641 struct elf_aarch64_link_hash_table
*htab
;
4643 htab
= elf_aarch64_hash_table (info
);
4645 for (stub_sec
= htab
->stub_bfd
->sections
;
4646 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
4650 /* Ignore non-stub sections. */
4651 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4654 /* Allocate memory to hold the linker stubs. */
4655 size
= stub_sec
->size
;
4656 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4657 if (stub_sec
->contents
== NULL
&& size
!= 0)
4661 /* Add a branch around the stub section, and a nop, to keep it 8 byte
4662 aligned, as long branch stubs contain a 64-bit address. */
4663 bfd_putl32 (0x14000000 | (size
>> 2), stub_sec
->contents
);
4664 bfd_putl32 (INSN_NOP
, stub_sec
->contents
+ 4);
4665 stub_sec
->size
+= 8;
4668 /* Build the stubs as directed by the stub hash table. */
4669 table
= &htab
->stub_hash_table
;
4670 bfd_hash_traverse (table
, aarch64_build_one_stub
, info
);
4676 /* Add an entry to the code/data map for section SEC. */
4679 elfNN_aarch64_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
4681 struct _aarch64_elf_section_data
*sec_data
=
4682 elf_aarch64_section_data (sec
);
4683 unsigned int newidx
;
4685 if (sec_data
->map
== NULL
)
4687 sec_data
->map
= bfd_malloc (sizeof (elf_aarch64_section_map
));
4688 sec_data
->mapcount
= 0;
4689 sec_data
->mapsize
= 1;
4692 newidx
= sec_data
->mapcount
++;
4694 if (sec_data
->mapcount
> sec_data
->mapsize
)
4696 sec_data
->mapsize
*= 2;
4697 sec_data
->map
= bfd_realloc_or_free
4698 (sec_data
->map
, sec_data
->mapsize
* sizeof (elf_aarch64_section_map
));
4703 sec_data
->map
[newidx
].vma
= vma
;
4704 sec_data
->map
[newidx
].type
= type
;
4709 /* Initialise maps of insn/data for input BFDs. */
4711 bfd_elfNN_aarch64_init_maps (bfd
*abfd
)
4713 Elf_Internal_Sym
*isymbuf
;
4714 Elf_Internal_Shdr
*hdr
;
4715 unsigned int i
, localsyms
;
4717 /* Make sure that we are dealing with an AArch64 elf binary. */
4718 if (!is_aarch64_elf (abfd
))
4721 if ((abfd
->flags
& DYNAMIC
) != 0)
4724 hdr
= &elf_symtab_hdr (abfd
);
4725 localsyms
= hdr
->sh_info
;
4727 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4728 should contain the number of local symbols, which should come before any
4729 global symbols. Mapping symbols are always local. */
4730 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
, NULL
);
4732 /* No internal symbols read? Skip this BFD. */
4733 if (isymbuf
== NULL
)
4736 for (i
= 0; i
< localsyms
; i
++)
4738 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
4739 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4742 if (sec
!= NULL
&& ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
4744 name
= bfd_elf_string_from_elf_section (abfd
,
4748 if (bfd_is_aarch64_special_symbol_name
4749 (name
, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP
))
4750 elfNN_aarch64_section_map_add (sec
, name
[1], isym
->st_value
);
4756 setup_plt_values (struct bfd_link_info
*link_info
,
4757 aarch64_plt_type plt_type
)
4759 struct elf_aarch64_link_hash_table
*globals
;
4760 globals
= elf_aarch64_hash_table (link_info
);
4762 if (plt_type
== PLT_BTI_PAC
)
4764 globals
->plt0_entry
= elfNN_aarch64_small_plt0_bti_entry
;
4766 /* Only in ET_EXEC we need PLTn with BTI. */
4767 if (bfd_link_pde (link_info
))
4769 globals
->plt_entry_size
= PLT_BTI_PAC_SMALL_ENTRY_SIZE
;
4770 globals
->plt_entry
= elfNN_aarch64_small_plt_bti_pac_entry
;
4774 globals
->plt_entry_size
= PLT_PAC_SMALL_ENTRY_SIZE
;
4775 globals
->plt_entry
= elfNN_aarch64_small_plt_pac_entry
;
4778 else if (plt_type
== PLT_BTI
)
4780 globals
->plt0_entry
= elfNN_aarch64_small_plt0_bti_entry
;
4782 /* Only in ET_EXEC we need PLTn with BTI. */
4783 if (bfd_link_pde (link_info
))
4785 globals
->plt_entry_size
= PLT_BTI_SMALL_ENTRY_SIZE
;
4786 globals
->plt_entry
= elfNN_aarch64_small_plt_bti_entry
;
4789 else if (plt_type
== PLT_PAC
)
4791 globals
->plt_entry_size
= PLT_PAC_SMALL_ENTRY_SIZE
;
4792 globals
->plt_entry
= elfNN_aarch64_small_plt_pac_entry
;
4796 /* Set option values needed during linking. */
4798 bfd_elfNN_aarch64_set_options (struct bfd
*output_bfd
,
4799 struct bfd_link_info
*link_info
,
4801 int no_wchar_warn
, int pic_veneer
,
4802 int fix_erratum_835769
,
4803 erratum_84319_opts fix_erratum_843419
,
4804 int no_apply_dynamic_relocs
,
4805 aarch64_bti_pac_info bp_info
)
4807 struct elf_aarch64_link_hash_table
*globals
;
4809 globals
= elf_aarch64_hash_table (link_info
);
4810 globals
->pic_veneer
= pic_veneer
;
4811 globals
->fix_erratum_835769
= fix_erratum_835769
;
4812 /* If the default options are used, then ERRAT_ADR will be set by default
4813 which will enable the ADRP->ADR workaround for the erratum 843419
4815 globals
->fix_erratum_843419
= fix_erratum_843419
;
4816 globals
->no_apply_dynamic_relocs
= no_apply_dynamic_relocs
;
4818 BFD_ASSERT (is_aarch64_elf (output_bfd
));
4819 elf_aarch64_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
4820 elf_aarch64_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
4822 switch (bp_info
.bti_type
)
4825 elf_aarch64_tdata (output_bfd
)->no_bti_warn
= 0;
4826 elf_aarch64_tdata (output_bfd
)->gnu_and_prop
4827 |= GNU_PROPERTY_AARCH64_FEATURE_1_BTI
;
4833 elf_aarch64_tdata (output_bfd
)->plt_type
= bp_info
.plt_type
;
4834 setup_plt_values (link_info
, bp_info
.plt_type
);
4838 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry
*h
,
4839 struct elf_aarch64_link_hash_table
4840 *globals
, struct bfd_link_info
*info
,
4841 bfd_vma value
, bfd
*output_bfd
,
4842 bool *unresolved_reloc_p
)
4844 bfd_vma off
= (bfd_vma
) - 1;
4845 asection
*basegot
= globals
->root
.sgot
;
4846 bool dyn
= globals
->root
.dynamic_sections_created
;
4850 BFD_ASSERT (basegot
!= NULL
);
4851 off
= h
->got
.offset
;
4852 BFD_ASSERT (off
!= (bfd_vma
) - 1);
4853 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
4854 || (bfd_link_pic (info
)
4855 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4856 || (ELF_ST_VISIBILITY (h
->other
)
4857 && h
->root
.type
== bfd_link_hash_undefweak
))
4859 /* This is actually a static link, or it is a -Bsymbolic link
4860 and the symbol is defined locally. We must initialize this
4861 entry in the global offset table. Since the offset must
4862 always be a multiple of 8 (4 in the case of ILP32), we use
4863 the least significant bit to record whether we have
4864 initialized it already.
4865 When doing a dynamic link, we create a .rel(a).got relocation
4866 entry to initialize the value. This is done in the
4867 finish_dynamic_symbol routine. */
4872 bfd_put_NN (output_bfd
, value
, basegot
->contents
+ off
);
4877 *unresolved_reloc_p
= false;
4879 off
= off
+ basegot
->output_section
->vma
+ basegot
->output_offset
;
4885 /* Change R_TYPE to a more efficient access model where possible,
4886 return the new reloc type. */
4888 static bfd_reloc_code_real_type
4889 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type
,
4890 struct elf_link_hash_entry
*h
)
4892 bool is_local
= h
== NULL
;
4896 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4897 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4899 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4900 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
);
4902 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4904 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4907 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4909 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4910 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4912 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
4914 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4915 : BFD_RELOC_AARCH64_NONE
);
4917 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
4919 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4920 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
);
4922 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
4924 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4925 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
);
4927 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
4928 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4930 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4931 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
);
4933 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4934 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
: r_type
;
4936 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
4937 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
: r_type
;
4939 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4942 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4944 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4945 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4947 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
4948 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
4949 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4950 /* Instructions with these relocations will become NOPs. */
4951 return BFD_RELOC_AARCH64_NONE
;
4953 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4954 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4955 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4956 return is_local
? BFD_RELOC_AARCH64_NONE
: r_type
;
4959 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4961 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4962 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
;
4964 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4966 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4967 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
;
4978 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type
)
4982 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
4983 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
4984 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
4985 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
4986 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
4987 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
4988 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
4989 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
4990 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
4993 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4994 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4995 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4996 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4997 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4998 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4999 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
5000 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
5003 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5004 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
5005 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5006 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5007 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5008 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
5009 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
5010 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5011 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5012 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
5013 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
5014 return GOT_TLSDESC_GD
;
5016 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5017 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
5018 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5019 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5020 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
5021 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
5031 aarch64_can_relax_tls (bfd
*input_bfd
,
5032 struct bfd_link_info
*info
,
5033 bfd_reloc_code_real_type r_type
,
5034 struct elf_link_hash_entry
*h
,
5035 unsigned long r_symndx
)
5037 unsigned int symbol_got_type
;
5038 unsigned int reloc_got_type
;
5040 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type
))
5043 symbol_got_type
= elfNN_aarch64_symbol_got_type (h
, input_bfd
, r_symndx
);
5044 reloc_got_type
= aarch64_reloc_got_type (r_type
);
5046 if (symbol_got_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (reloc_got_type
))
5049 if (!bfd_link_executable (info
))
5052 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
)
5058 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
5061 static bfd_reloc_code_real_type
5062 aarch64_tls_transition (bfd
*input_bfd
,
5063 struct bfd_link_info
*info
,
5064 unsigned int r_type
,
5065 struct elf_link_hash_entry
*h
,
5066 unsigned long r_symndx
)
5068 bfd_reloc_code_real_type bfd_r_type
5069 = elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
5071 if (! aarch64_can_relax_tls (input_bfd
, info
, bfd_r_type
, h
, r_symndx
))
5074 return aarch64_tls_transition_without_check (bfd_r_type
, h
);
5077 /* Return the base VMA address which should be subtracted from real addresses
5078 when resolving R_AARCH64_TLS_DTPREL relocation. */
5081 dtpoff_base (struct bfd_link_info
*info
)
5083 /* If tls_sec is NULL, we should have signalled an error already. */
5084 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
5085 return elf_hash_table (info
)->tls_sec
->vma
;
5088 /* Return the base VMA address which should be subtracted from real addresses
5089 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
5092 tpoff_base (struct bfd_link_info
*info
)
5094 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5096 /* If tls_sec is NULL, we should have signalled an error already. */
5097 BFD_ASSERT (htab
->tls_sec
!= NULL
);
5099 bfd_vma base
= align_power ((bfd_vma
) TCB_SIZE
,
5100 htab
->tls_sec
->alignment_power
);
5101 return htab
->tls_sec
->vma
- base
;
5105 symbol_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5106 unsigned long r_symndx
)
5108 /* Calculate the address of the GOT entry for symbol
5109 referred to in h. */
5111 return &h
->got
.offset
;
5115 struct elf_aarch64_local_symbol
*l
;
5117 l
= elf_aarch64_locals (input_bfd
);
5118 return &l
[r_symndx
].got_offset
;
5123 symbol_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5124 unsigned long r_symndx
)
5127 p
= symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
5132 symbol_got_offset_mark_p (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5133 unsigned long r_symndx
)
5136 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
5141 symbol_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5142 unsigned long r_symndx
)
5145 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
5151 symbol_tlsdesc_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5152 unsigned long r_symndx
)
5154 /* Calculate the address of the GOT entry for symbol
5155 referred to in h. */
5158 struct elf_aarch64_link_hash_entry
*eh
;
5159 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
5160 return &eh
->tlsdesc_got_jump_table_offset
;
5165 struct elf_aarch64_local_symbol
*l
;
5167 l
= elf_aarch64_locals (input_bfd
);
5168 return &l
[r_symndx
].tlsdesc_got_jump_table_offset
;
5173 symbol_tlsdesc_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5174 unsigned long r_symndx
)
5177 p
= symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
5182 symbol_tlsdesc_got_offset_mark_p (bfd
*input_bfd
,
5183 struct elf_link_hash_entry
*h
,
5184 unsigned long r_symndx
)
5187 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
5192 symbol_tlsdesc_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
5193 unsigned long r_symndx
)
5196 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
5201 /* Data for make_branch_to_erratum_835769_stub(). */
5203 struct erratum_835769_branch_to_stub_data
5205 struct bfd_link_info
*info
;
5206 asection
*output_section
;
5210 /* Helper to insert branches to erratum 835769 stubs in the right
5211 places for a particular section. */
5214 make_branch_to_erratum_835769_stub (struct bfd_hash_entry
*gen_entry
,
5217 struct elf_aarch64_stub_hash_entry
*stub_entry
;
5218 struct erratum_835769_branch_to_stub_data
*data
;
5220 unsigned long branch_insn
= 0;
5221 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
5222 bfd_signed_vma branch_offset
;
5223 unsigned int target
;
5226 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
5227 data
= (struct erratum_835769_branch_to_stub_data
*) in_arg
;
5229 if (stub_entry
->target_section
!= data
->output_section
5230 || stub_entry
->stub_type
!= aarch64_stub_erratum_835769_veneer
)
5233 contents
= data
->contents
;
5234 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
5235 + stub_entry
->target_section
->output_offset
5236 + stub_entry
->target_value
;
5237 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
5238 + stub_entry
->stub_sec
->output_offset
5239 + stub_entry
->stub_offset
;
5240 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
5242 abfd
= stub_entry
->target_section
->owner
;
5243 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
5245 (_("%pB: error: erratum 835769 stub out "
5246 "of range (input file too large)"), abfd
);
5248 target
= stub_entry
->target_value
;
5249 branch_insn
= 0x14000000;
5250 branch_offset
>>= 2;
5251 branch_offset
&= 0x3ffffff;
5252 branch_insn
|= branch_offset
;
5253 bfd_putl32 (branch_insn
, &contents
[target
]);
5260 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry
*gen_entry
,
5263 struct elf_aarch64_stub_hash_entry
*stub_entry
5264 = (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
5265 struct erratum_835769_branch_to_stub_data
*data
5266 = (struct erratum_835769_branch_to_stub_data
*) in_arg
;
5267 struct bfd_link_info
*info
;
5268 struct elf_aarch64_link_hash_table
*htab
;
5276 contents
= data
->contents
;
5277 section
= data
->output_section
;
5279 htab
= elf_aarch64_hash_table (info
);
5281 if (stub_entry
->target_section
!= section
5282 || stub_entry
->stub_type
!= aarch64_stub_erratum_843419_veneer
)
5285 BFD_ASSERT (((htab
->fix_erratum_843419
& ERRAT_ADRP
) && stub_entry
->stub_sec
)
5286 || (htab
->fix_erratum_843419
& ERRAT_ADR
));
5288 /* Only update the stub section if we have one. We should always have one if
5289 we're allowed to use the ADRP errata workaround, otherwise it is not
5291 if (stub_entry
->stub_sec
)
5293 insn
= bfd_getl32 (contents
+ stub_entry
->target_value
);
5295 stub_entry
->stub_sec
->contents
+ stub_entry
->stub_offset
);
5298 place
= (section
->output_section
->vma
+ section
->output_offset
5299 + stub_entry
->adrp_offset
);
5300 insn
= bfd_getl32 (contents
+ stub_entry
->adrp_offset
);
5302 if (!_bfd_aarch64_adrp_p (insn
))
5305 bfd_signed_vma imm
=
5306 (_bfd_aarch64_sign_extend
5307 ((bfd_vma
) _bfd_aarch64_decode_adrp_imm (insn
) << 12, 33)
5310 if ((htab
->fix_erratum_843419
& ERRAT_ADR
)
5311 && (imm
>= AARCH64_MIN_ADRP_IMM
&& imm
<= AARCH64_MAX_ADRP_IMM
))
5313 insn
= (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP
, imm
)
5314 | AARCH64_RT (insn
));
5315 bfd_putl32 (insn
, contents
+ stub_entry
->adrp_offset
);
5316 /* Stub is not needed, don't map it out. */
5317 stub_entry
->stub_type
= aarch64_stub_none
;
5319 else if (htab
->fix_erratum_843419
& ERRAT_ADRP
)
5321 bfd_vma veneered_insn_loc
;
5322 bfd_vma veneer_entry_loc
;
5323 bfd_signed_vma branch_offset
;
5324 uint32_t branch_insn
;
5326 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
5327 + stub_entry
->target_section
->output_offset
5328 + stub_entry
->target_value
;
5329 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
5330 + stub_entry
->stub_sec
->output_offset
5331 + stub_entry
->stub_offset
;
5332 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
5334 abfd
= stub_entry
->target_section
->owner
;
5335 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
5337 (_("%pB: error: erratum 843419 stub out "
5338 "of range (input file too large)"), abfd
);
5340 branch_insn
= 0x14000000;
5341 branch_offset
>>= 2;
5342 branch_offset
&= 0x3ffffff;
5343 branch_insn
|= branch_offset
;
5344 bfd_putl32 (branch_insn
, contents
+ stub_entry
->target_value
);
5348 abfd
= stub_entry
->target_section
->owner
;
5350 (_("%pB: error: erratum 843419 immediate 0x%" BFD_VMA_FMT
"x "
5351 "out of range for ADR (input file too large) and "
5352 "--fix-cortex-a53-843419=adr used. Run the linker with "
5353 "--fix-cortex-a53-843419=full instead"), abfd
, imm
);
5354 bfd_set_error (bfd_error_bad_value
);
5355 /* This function is called inside a hashtable traversal and the error
5356 handlers called above turn into non-fatal errors. Which means this
5357 case ld returns an exit code 0 and also produces a broken object file.
5358 To prevent this, issue a hard abort. */
5366 elfNN_aarch64_write_section (bfd
*output_bfd ATTRIBUTE_UNUSED
,
5367 struct bfd_link_info
*link_info
,
5372 struct elf_aarch64_link_hash_table
*globals
=
5373 elf_aarch64_hash_table (link_info
);
5375 if (globals
== NULL
)
5378 /* Fix code to point to erratum 835769 stubs. */
5379 if (globals
->fix_erratum_835769
)
5381 struct erratum_835769_branch_to_stub_data data
;
5383 data
.info
= link_info
;
5384 data
.output_section
= sec
;
5385 data
.contents
= contents
;
5386 bfd_hash_traverse (&globals
->stub_hash_table
,
5387 make_branch_to_erratum_835769_stub
, &data
);
5390 if (globals
->fix_erratum_843419
)
5392 struct erratum_835769_branch_to_stub_data data
;
5394 data
.info
= link_info
;
5395 data
.output_section
= sec
;
5396 data
.contents
= contents
;
5397 bfd_hash_traverse (&globals
->stub_hash_table
,
5398 _bfd_aarch64_erratum_843419_branch_to_stub
, &data
);
5404 /* Return TRUE if RELOC is a relocation against the base of GOT table. */
5407 aarch64_relocation_aginst_gp_p (bfd_reloc_code_real_type reloc
)
5409 return (reloc
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
5410 || reloc
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5411 || reloc
== BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
5412 || reloc
== BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
5413 || reloc
== BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
);
5416 /* Perform a relocation as part of a final link. The input relocation type
5417 should be TLS relaxed. */
5419 static bfd_reloc_status_type
5420 elfNN_aarch64_final_link_relocate (reloc_howto_type
*howto
,
5423 asection
*input_section
,
5425 Elf_Internal_Rela
*rel
,
5427 struct bfd_link_info
*info
,
5429 struct elf_link_hash_entry
*h
,
5430 bool *unresolved_reloc_p
,
5432 bfd_vma
*saved_addend
,
5433 Elf_Internal_Sym
*sym
)
5435 Elf_Internal_Shdr
*symtab_hdr
;
5436 unsigned int r_type
= howto
->type
;
5437 bfd_reloc_code_real_type bfd_r_type
5438 = elfNN_aarch64_bfd_reloc_from_howto (howto
);
5439 unsigned long r_symndx
;
5440 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
5441 bfd_vma place
, off
, got_entry_addr
= 0;
5442 bfd_signed_vma signed_addend
;
5443 struct elf_aarch64_link_hash_table
*globals
;
5445 bool relative_reloc
;
5447 bfd_vma orig_value
= value
;
5448 bool resolved_to_zero
;
5451 globals
= elf_aarch64_hash_table (info
);
5453 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
5455 BFD_ASSERT (is_aarch64_elf (input_bfd
));
5457 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
5459 place
= input_section
->output_section
->vma
5460 + input_section
->output_offset
+ rel
->r_offset
;
5462 /* Get addend, accumulating the addend for consecutive relocs
5463 which refer to the same offset. */
5464 signed_addend
= saved_addend
? *saved_addend
: 0;
5465 signed_addend
+= rel
->r_addend
;
5467 weak_undef_p
= (h
? h
->root
.type
== bfd_link_hash_undefweak
5468 : bfd_is_und_section (sym_sec
));
5469 abs_symbol_p
= h
!= NULL
&& bfd_is_abs_symbol (&h
->root
);
5472 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
5473 it here if it is defined in a non-shared object. */
5475 && h
->type
== STT_GNU_IFUNC
5482 if ((input_section
->flags
& SEC_ALLOC
) == 0)
5484 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
5485 STT_GNU_IFUNC symbol as STT_FUNC. */
5486 if (elf_section_type (input_section
) == SHT_NOTE
)
5489 /* Dynamic relocs are not propagated for SEC_DEBUGGING
5490 sections because such sections are not SEC_ALLOC and
5491 thus ld.so will not process them. */
5492 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
5493 return bfd_reloc_ok
;
5495 if (h
->root
.root
.string
)
5496 name
= h
->root
.root
.string
;
5498 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
, NULL
);
5500 /* xgettext:c-format */
5501 (_("%pB(%pA+%#" PRIx64
"): "
5502 "unresolvable %s relocation against symbol `%s'"),
5503 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
5505 bfd_set_error (bfd_error_bad_value
);
5506 return bfd_reloc_notsupported
;
5508 else if (h
->plt
.offset
== (bfd_vma
) -1)
5509 goto bad_ifunc_reloc
;
5511 /* STT_GNU_IFUNC symbol must go through PLT. */
5512 plt
= globals
->root
.splt
? globals
->root
.splt
: globals
->root
.iplt
;
5513 value
= (plt
->output_section
->vma
+ plt
->output_offset
+ h
->plt
.offset
);
5519 if (h
->root
.root
.string
)
5520 name
= h
->root
.root
.string
;
5522 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
5525 /* xgettext:c-format */
5526 (_("%pB: relocation %s against STT_GNU_IFUNC "
5527 "symbol `%s' isn't handled by %s"), input_bfd
,
5528 howto
->name
, name
, __FUNCTION__
);
5529 bfd_set_error (bfd_error_bad_value
);
5530 return bfd_reloc_notsupported
;
5532 case BFD_RELOC_AARCH64_NN
:
5533 if (rel
->r_addend
!= 0)
5535 if (h
->root
.root
.string
)
5536 name
= h
->root
.root
.string
;
5538 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
5541 /* xgettext:c-format */
5542 (_("%pB: relocation %s against STT_GNU_IFUNC "
5543 "symbol `%s' has non-zero addend: %" PRId64
),
5544 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
5545 bfd_set_error (bfd_error_bad_value
);
5546 return bfd_reloc_notsupported
;
5549 /* Generate dynamic relocation only when there is a
5550 non-GOT reference in a shared object. */
5551 if (bfd_link_pic (info
) && h
->non_got_ref
)
5553 Elf_Internal_Rela outrel
;
5556 /* Need a dynamic relocation to get the real function
5558 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
5562 if (outrel
.r_offset
== (bfd_vma
) -1
5563 || outrel
.r_offset
== (bfd_vma
) -2)
5566 outrel
.r_offset
+= (input_section
->output_section
->vma
5567 + input_section
->output_offset
);
5569 if (h
->dynindx
== -1
5571 || bfd_link_executable (info
))
5573 /* This symbol is resolved locally. */
5574 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
5575 outrel
.r_addend
= (h
->root
.u
.def
.value
5576 + h
->root
.u
.def
.section
->output_section
->vma
5577 + h
->root
.u
.def
.section
->output_offset
);
5581 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5582 outrel
.r_addend
= 0;
5585 sreloc
= globals
->root
.irelifunc
;
5586 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5588 /* If this reloc is against an external symbol, we
5589 do not want to fiddle with the addend. Otherwise,
5590 we need to include the symbol value so that it
5591 becomes an addend for the dynamic reloc. For an
5592 internal symbol, we have updated addend. */
5593 return bfd_reloc_ok
;
5596 case BFD_RELOC_AARCH64_CALL26
:
5597 case BFD_RELOC_AARCH64_JUMP26
:
5598 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5602 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5604 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5605 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5606 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5607 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5608 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5609 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5610 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5611 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5612 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5613 base_got
= globals
->root
.sgot
;
5614 off
= h
->got
.offset
;
5616 if (base_got
== NULL
)
5619 if (off
== (bfd_vma
) -1)
5623 /* We can't use h->got.offset here to save state, or
5624 even just remember the offset, as finish_dynamic_symbol
5625 would use that as offset into .got. */
5627 if (globals
->root
.splt
!= NULL
)
5629 plt_index
= ((h
->plt
.offset
- globals
->plt_header_size
) /
5630 globals
->plt_entry_size
);
5631 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
5632 base_got
= globals
->root
.sgotplt
;
5636 plt_index
= h
->plt
.offset
/ globals
->plt_entry_size
;
5637 off
= plt_index
* GOT_ENTRY_SIZE
;
5638 base_got
= globals
->root
.igotplt
;
5641 if (h
->dynindx
== -1
5645 /* This references the local definition. We must
5646 initialize this entry in the global offset table.
5647 Since the offset must always be a multiple of 8,
5648 we use the least significant bit to record
5649 whether we have initialized it already.
5651 When doing a dynamic link, we create a .rela.got
5652 relocation entry to initialize the value. This
5653 is done in the finish_dynamic_symbol routine. */
5658 bfd_put_NN (output_bfd
, value
,
5659 base_got
->contents
+ off
);
5660 /* Note that this is harmless as -1 | 1 still is -1. */
5664 value
= (base_got
->output_section
->vma
5665 + base_got
->output_offset
+ off
);
5668 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
,
5670 unresolved_reloc_p
);
5672 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5673 addend
= (globals
->root
.sgot
->output_section
->vma
5674 + globals
->root
.sgot
->output_offset
);
5676 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5678 addend
, weak_undef_p
);
5679 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
, howto
, value
);
5680 case BFD_RELOC_AARCH64_ADD_LO12
:
5681 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5687 resolved_to_zero
= (h
!= NULL
5688 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
5692 case BFD_RELOC_AARCH64_NONE
:
5693 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5694 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5695 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5696 *unresolved_reloc_p
= false;
5697 return bfd_reloc_ok
;
5699 case BFD_RELOC_AARCH64_NN
:
5701 /* When generating a shared object or relocatable executable, these
5702 relocations are copied into the output file to be resolved at
5704 if (((bfd_link_pic (info
)
5705 || globals
->root
.is_relocatable_executable
)
5706 && (input_section
->flags
& SEC_ALLOC
)
5708 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5709 && !resolved_to_zero
)
5710 || h
->root
.type
!= bfd_link_hash_undefweak
))
5711 /* Or we are creating an executable, we may need to keep relocations
5712 for symbols satisfied by a dynamic library if we manage to avoid
5713 copy relocs for the symbol. */
5714 || (ELIMINATE_COPY_RELOCS
5715 && !bfd_link_pic (info
)
5717 && (input_section
->flags
& SEC_ALLOC
)
5722 || h
->root
.type
== bfd_link_hash_undefweak
5723 || h
->root
.type
== bfd_link_hash_undefined
)))
5725 Elf_Internal_Rela outrel
;
5727 bool skip
, relocate
;
5730 *unresolved_reloc_p
= false;
5735 outrel
.r_addend
= signed_addend
;
5737 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5739 if (outrel
.r_offset
== (bfd_vma
) - 1)
5741 else if (outrel
.r_offset
== (bfd_vma
) - 2)
5746 else if (abs_symbol_p
)
5748 /* Local absolute symbol. */
5749 skip
= (h
->forced_local
|| (h
->dynindx
== -1));
5753 outrel
.r_offset
+= (input_section
->output_section
->vma
5754 + input_section
->output_offset
);
5757 memset (&outrel
, 0, sizeof outrel
);
5760 && (!bfd_link_pic (info
)
5761 || !(bfd_link_pie (info
) || SYMBOLIC_BIND (info
, h
))
5762 || !h
->def_regular
))
5763 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5768 /* On SVR4-ish systems, the dynamic loader cannot
5769 relocate the text and data segments independently,
5770 so the symbol does not matter. */
5772 relocate
= !globals
->no_apply_dynamic_relocs
;
5773 outrel
.r_info
= ELFNN_R_INFO (symbol
, AARCH64_R (RELATIVE
));
5774 outrel
.r_addend
+= value
;
5777 sreloc
= elf_section_data (input_section
)->sreloc
;
5778 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
5779 return bfd_reloc_notsupported
;
5781 loc
= sreloc
->contents
+ sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
5782 bfd_elfNN_swap_reloca_out (output_bfd
, &outrel
, loc
);
5784 if (sreloc
->reloc_count
* RELOC_SIZE (globals
) > sreloc
->size
)
5786 /* Sanity to check that we have previously allocated
5787 sufficient space in the relocation section for the
5788 number of relocations we actually want to emit. */
5792 /* If this reloc is against an external symbol, we do not want to
5793 fiddle with the addend. Otherwise, we need to include the symbol
5794 value so that it becomes an addend for the dynamic reloc. */
5796 return bfd_reloc_ok
;
5798 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5799 contents
, rel
->r_offset
, value
,
5803 value
+= signed_addend
;
5806 case BFD_RELOC_AARCH64_CALL26
:
5807 case BFD_RELOC_AARCH64_JUMP26
:
5809 asection
*splt
= globals
->root
.splt
;
5811 splt
!= NULL
&& h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) - 1;
5813 /* A call to an undefined weak symbol is converted to a jump to
5814 the next instruction unless a PLT entry will be created.
5815 The jump to the next instruction is optimized as a NOP.
5816 Do the same for local undefined symbols. */
5817 if (weak_undef_p
&& ! via_plt_p
)
5819 bfd_putl32 (INSN_NOP
, hit_data
);
5820 return bfd_reloc_ok
;
5823 /* If the call goes through a PLT entry, make sure to
5824 check distance to the right destination address. */
5826 value
= (splt
->output_section
->vma
5827 + splt
->output_offset
+ h
->plt
.offset
);
5829 /* Check if a stub has to be inserted because the destination
5831 struct elf_aarch64_stub_hash_entry
*stub_entry
= NULL
;
5833 /* If the branch destination is directed to plt stub, "value" will be
5834 the final destination, otherwise we should plus signed_addend, it may
5835 contain non-zero value, for example call to local function symbol
5836 which are turned into "sec_sym + sec_off", and sec_off is kept in
5838 if (! aarch64_valid_branch_p (via_plt_p
? value
: value
+ signed_addend
,
5840 /* The target is out of reach, so redirect the branch to
5841 the local stub for this function. */
5842 stub_entry
= elfNN_aarch64_get_stub_entry (input_section
, sym_sec
, h
,
5844 if (stub_entry
!= NULL
)
5846 value
= (stub_entry
->stub_offset
5847 + stub_entry
->stub_sec
->output_offset
5848 + stub_entry
->stub_sec
->output_section
->vma
);
5850 /* We have redirected the destination to stub entry address,
5851 so ignore any addend record in the original rela entry. */
5855 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5857 signed_addend
, weak_undef_p
);
5858 *unresolved_reloc_p
= false;
5861 case BFD_RELOC_AARCH64_16_PCREL
:
5862 case BFD_RELOC_AARCH64_32_PCREL
:
5863 case BFD_RELOC_AARCH64_64_PCREL
:
5864 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
5865 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5866 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
5867 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
5868 case BFD_RELOC_AARCH64_MOVW_PREL_G0
:
5869 case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC
:
5870 case BFD_RELOC_AARCH64_MOVW_PREL_G1
:
5871 case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC
:
5872 case BFD_RELOC_AARCH64_MOVW_PREL_G2
:
5873 case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC
:
5874 case BFD_RELOC_AARCH64_MOVW_PREL_G3
:
5875 if (bfd_link_pic (info
)
5876 && (input_section
->flags
& SEC_ALLOC
) != 0
5877 && (input_section
->flags
& SEC_READONLY
) != 0
5878 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
5880 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5883 /* xgettext:c-format */
5884 (_("%pB: relocation %s against symbol `%s' which may bind "
5885 "externally can not be used when making a shared object; "
5886 "recompile with -fPIC"),
5887 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
5888 h
->root
.root
.string
);
5889 bfd_set_error (bfd_error_bad_value
);
5890 return bfd_reloc_notsupported
;
5892 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5898 case BFD_RELOC_AARCH64_BRANCH19
:
5899 case BFD_RELOC_AARCH64_TSTBR14
:
5900 if (h
&& h
->root
.type
== bfd_link_hash_undefined
)
5903 /* xgettext:c-format */
5904 (_("%pB: conditional branch to undefined symbol `%s' "
5905 "not allowed"), input_bfd
, h
->root
.root
.string
);
5906 bfd_set_error (bfd_error_bad_value
);
5907 return bfd_reloc_notsupported
;
5911 case BFD_RELOC_AARCH64_16
:
5913 case BFD_RELOC_AARCH64_32
:
5915 case BFD_RELOC_AARCH64_ADD_LO12
:
5916 case BFD_RELOC_AARCH64_LDST128_LO12
:
5917 case BFD_RELOC_AARCH64_LDST16_LO12
:
5918 case BFD_RELOC_AARCH64_LDST32_LO12
:
5919 case BFD_RELOC_AARCH64_LDST64_LO12
:
5920 case BFD_RELOC_AARCH64_LDST8_LO12
:
5921 case BFD_RELOC_AARCH64_MOVW_G0
:
5922 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
5923 case BFD_RELOC_AARCH64_MOVW_G0_S
:
5924 case BFD_RELOC_AARCH64_MOVW_G1
:
5925 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
5926 case BFD_RELOC_AARCH64_MOVW_G1_S
:
5927 case BFD_RELOC_AARCH64_MOVW_G2
:
5928 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
5929 case BFD_RELOC_AARCH64_MOVW_G2_S
:
5930 case BFD_RELOC_AARCH64_MOVW_G3
:
5931 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5933 signed_addend
, weak_undef_p
);
5936 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5937 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5938 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5939 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5940 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5941 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5942 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5943 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5944 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5945 if (globals
->root
.sgot
== NULL
)
5946 BFD_ASSERT (h
!= NULL
);
5948 relative_reloc
= false;
5953 /* If a symbol is not dynamic and is not undefined weak, bind it
5954 locally and generate a RELATIVE relocation under PIC mode.
5956 NOTE: one symbol may be referenced by several relocations, we
5957 should only generate one RELATIVE relocation for that symbol.
5958 Therefore, check GOT offset mark first. */
5959 if (h
->dynindx
== -1
5961 && h
->root
.type
!= bfd_link_hash_undefweak
5962 && bfd_link_pic (info
)
5963 && !symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5964 relative_reloc
= true;
5966 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5968 unresolved_reloc_p
);
5969 /* Record the GOT entry address which will be used when generating
5970 RELATIVE relocation. */
5972 got_entry_addr
= value
;
5974 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5975 addend
= (globals
->root
.sgot
->output_section
->vma
5976 + globals
->root
.sgot
->output_offset
);
5977 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5979 addend
, weak_undef_p
);
5984 struct elf_aarch64_local_symbol
*locals
5985 = elf_aarch64_locals (input_bfd
);
5989 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5991 /* xgettext:c-format */
5992 (_("%pB: local symbol descriptor table be NULL when applying "
5993 "relocation %s against local symbol"),
5994 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5998 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5999 base_got
= globals
->root
.sgot
;
6000 got_entry_addr
= (base_got
->output_section
->vma
6001 + base_got
->output_offset
+ off
);
6003 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6005 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
6007 /* For local symbol, we have done absolute relocation in static
6008 linking stage. While for shared library, we need to update the
6009 content of GOT entry according to the shared object's runtime
6010 base address. So, we need to generate a R_AARCH64_RELATIVE reloc
6011 for dynamic linker. */
6012 if (bfd_link_pic (info
))
6013 relative_reloc
= true;
6015 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6018 /* Update the relocation value to GOT entry addr as we have transformed
6019 the direct data access into indirect data access through GOT. */
6020 value
= got_entry_addr
;
6022 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
6023 addend
= base_got
->output_section
->vma
+ base_got
->output_offset
;
6025 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6027 addend
, weak_undef_p
);
6033 Elf_Internal_Rela outrel
;
6035 s
= globals
->root
.srelgot
;
6039 outrel
.r_offset
= got_entry_addr
;
6040 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
6041 outrel
.r_addend
= orig_value
;
6042 elf_append_rela (output_bfd
, s
, &outrel
);
6046 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6047 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6048 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6049 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6050 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
6051 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
6052 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6053 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6054 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6055 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6056 if (globals
->root
.sgot
== NULL
)
6057 return bfd_reloc_notsupported
;
6059 value
= (symbol_got_offset (input_bfd
, h
, r_symndx
)
6060 + globals
->root
.sgot
->output_section
->vma
6061 + globals
->root
.sgot
->output_offset
);
6063 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6066 *unresolved_reloc_p
= false;
6069 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6070 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6071 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6072 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6073 if (globals
->root
.sgot
== NULL
)
6074 return bfd_reloc_notsupported
;
6076 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6077 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6080 *unresolved_reloc_p
= false;
6083 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12
:
6084 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
:
6085 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC
:
6086 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12
:
6087 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC
:
6088 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12
:
6089 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC
:
6090 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12
:
6091 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC
:
6092 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12
:
6093 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC
:
6094 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0
:
6095 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC
:
6096 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1
:
6097 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC
:
6098 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2
:
6100 if (!(weak_undef_p
|| elf_hash_table (info
)->tls_sec
))
6102 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
6104 /* xgettext:c-format */
6105 (_("%pB: TLS relocation %s against undefined symbol `%s'"),
6106 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
6107 h
->root
.root
.string
);
6108 bfd_set_error (bfd_error_bad_value
);
6109 return bfd_reloc_notsupported
;
6113 = weak_undef_p
? 0 : signed_addend
- dtpoff_base (info
);
6114 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6116 def_value
, weak_undef_p
);
6120 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
6121 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
6122 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
6123 case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12
:
6124 case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC
:
6125 case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12
:
6126 case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC
:
6127 case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12
:
6128 case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC
:
6129 case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12
:
6130 case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC
:
6131 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
6132 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
6133 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
6134 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
6135 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
6137 if (!(weak_undef_p
|| elf_hash_table (info
)->tls_sec
))
6139 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
6141 /* xgettext:c-format */
6142 (_("%pB: TLS relocation %s against undefined symbol `%s'"),
6143 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
6144 h
->root
.root
.string
);
6145 bfd_set_error (bfd_error_bad_value
);
6146 return bfd_reloc_notsupported
;
6150 = weak_undef_p
? 0 : signed_addend
- tpoff_base (info
);
6151 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6153 def_value
, weak_undef_p
);
6154 *unresolved_reloc_p
= false;
6158 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6159 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6160 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6161 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
6162 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
6163 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6164 if (globals
->root
.sgot
== NULL
)
6165 return bfd_reloc_notsupported
;
6166 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
6167 + globals
->root
.sgotplt
->output_section
->vma
6168 + globals
->root
.sgotplt
->output_offset
6169 + globals
->sgotplt_jump_table_size
);
6171 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6174 *unresolved_reloc_p
= false;
6177 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6178 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6179 if (globals
->root
.sgot
== NULL
)
6180 return bfd_reloc_notsupported
;
6182 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
6183 + globals
->root
.sgotplt
->output_section
->vma
6184 + globals
->root
.sgotplt
->output_offset
6185 + globals
->sgotplt_jump_table_size
);
6187 value
-= (globals
->root
.sgot
->output_section
->vma
6188 + globals
->root
.sgot
->output_offset
);
6190 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6193 *unresolved_reloc_p
= false;
6197 return bfd_reloc_notsupported
;
6201 *saved_addend
= value
;
6203 /* Only apply the final relocation in a sequence. */
6205 return bfd_reloc_continue
;
6207 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
6211 /* LP64 and ILP32 operates on x- and w-registers respectively.
6212 Next definitions take into account the difference between
6213 corresponding machine codes. R means x-register if the target
6214 arch is LP64, and w-register if the target is ILP32. */
6217 # define add_R0_R0 (0x91000000)
6218 # define add_R0_R0_R1 (0x8b000020)
6219 # define add_R0_R1 (0x91400020)
6220 # define ldr_R0 (0x58000000)
6221 # define ldr_R0_mask(i) (i & 0xffffffe0)
6222 # define ldr_R0_x0 (0xf9400000)
6223 # define ldr_hw_R0 (0xf2a00000)
6224 # define movk_R0 (0xf2800000)
6225 # define movz_R0 (0xd2a00000)
6226 # define movz_hw_R0 (0xd2c00000)
6227 #else /*ARCH_SIZE == 32 */
6228 # define add_R0_R0 (0x11000000)
6229 # define add_R0_R0_R1 (0x0b000020)
6230 # define add_R0_R1 (0x11400020)
6231 # define ldr_R0 (0x18000000)
6232 # define ldr_R0_mask(i) (i & 0xbfffffe0)
6233 # define ldr_R0_x0 (0xb9400000)
6234 # define ldr_hw_R0 (0x72a00000)
6235 # define movk_R0 (0x72800000)
6236 # define movz_R0 (0x52a00000)
6237 # define movz_hw_R0 (0x52c00000)
6240 /* Structure to hold payload for _bfd_aarch64_erratum_843419_clear_stub,
6241 it is used to identify the stub information to reset. */
6243 struct erratum_843419_branch_to_stub_clear_data
6245 bfd_vma adrp_offset
;
6246 asection
*output_section
;
6249 /* Clear the erratum information for GEN_ENTRY if the ADRP_OFFSET and
6250 section inside IN_ARG matches. The clearing is done by setting the
6251 stub_type to none. */
6254 _bfd_aarch64_erratum_843419_clear_stub (struct bfd_hash_entry
*gen_entry
,
6257 struct elf_aarch64_stub_hash_entry
*stub_entry
6258 = (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
6259 struct erratum_843419_branch_to_stub_clear_data
*data
6260 = (struct erratum_843419_branch_to_stub_clear_data
*) in_arg
;
6262 if (stub_entry
->target_section
!= data
->output_section
6263 || stub_entry
->stub_type
!= aarch64_stub_erratum_843419_veneer
6264 || stub_entry
->adrp_offset
!= data
->adrp_offset
)
6267 /* Change the stub type instead of removing the entry, removing from the hash
6268 table would be slower and we have already reserved the memory for the entry
6269 so there wouldn't be much gain. Changing the stub also keeps around a
6270 record of what was there before. */
6271 stub_entry
->stub_type
= aarch64_stub_none
;
6273 /* We're done and there could have been only one matching stub at that
6274 particular offset, so abort further traversal. */
6278 /* TLS Relaxations may relax an adrp sequence that matches the erratum 843419
6279 sequence. In this case the erratum no longer applies and we need to remove
6280 the entry from the pending stub generation. This clears matching adrp insn
6281 at ADRP_OFFSET in INPUT_SECTION in the stub table defined in GLOBALS. */
6284 clear_erratum_843419_entry (struct elf_aarch64_link_hash_table
*globals
,
6285 bfd_vma adrp_offset
, asection
*input_section
)
6287 if (globals
->fix_erratum_843419
& ERRAT_ADRP
)
6289 struct erratum_843419_branch_to_stub_clear_data data
;
6290 data
.adrp_offset
= adrp_offset
;
6291 data
.output_section
= input_section
;
6293 bfd_hash_traverse (&globals
->stub_hash_table
,
6294 _bfd_aarch64_erratum_843419_clear_stub
, &data
);
6298 /* Handle TLS relaxations. Relaxing is possible for symbols that use
6299 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
6302 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
6303 is to then call final_link_relocate. Return other values in the
6306 static bfd_reloc_status_type
6307 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table
*globals
,
6308 bfd
*input_bfd
, asection
*input_section
,
6309 bfd_byte
*contents
, Elf_Internal_Rela
*rel
,
6310 struct elf_link_hash_entry
*h
)
6312 bool is_local
= h
== NULL
;
6313 unsigned int r_type
= ELFNN_R_TYPE (rel
->r_info
);
6316 BFD_ASSERT (globals
&& input_bfd
&& contents
&& rel
);
6318 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
))
6320 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6321 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6324 /* GD->LE relaxation:
6325 adrp x0, :tlsgd:var => movz R0, :tprel_g1:var
6327 adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var
6329 Where R is x for LP64, and w for ILP32. */
6330 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
6331 /* We have relaxed the adrp into a mov, we may have to clear any
6332 pending erratum fixes. */
6333 clear_erratum_843419_entry (globals
, rel
->r_offset
, input_section
);
6334 return bfd_reloc_continue
;
6338 /* GD->IE relaxation:
6339 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
6341 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
6343 return bfd_reloc_continue
;
6346 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6350 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6353 /* Tiny TLSDESC->LE relaxation:
6354 ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var
6355 adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var
6359 Where R is x for LP64, and w for ILP32. */
6360 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
6361 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
6363 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6364 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
6365 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6367 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
6368 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 4);
6369 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
6370 return bfd_reloc_continue
;
6374 /* Tiny TLSDESC->IE relaxation:
6375 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
6376 adr x0, :tlsdesc:var => nop
6380 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
6381 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
6383 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6384 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6386 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
6387 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
6388 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
6389 return bfd_reloc_continue
;
6392 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6395 /* Tiny GD->LE relaxation:
6396 adr x0, :tlsgd:var => mrs x1, tpidr_el0
6397 bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12
6398 nop => add R0, R0, #:tprel_lo12_nc:x
6400 Where R is x for LP64, and x for Ilp32. */
6402 /* First kill the tls_get_addr reloc on the bl instruction. */
6403 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6405 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 0);
6406 bfd_putl32 (add_R0_R1
, contents
+ rel
->r_offset
+ 4);
6407 bfd_putl32 (add_R0_R0
, contents
+ rel
->r_offset
+ 8);
6409 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6410 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
));
6411 rel
[1].r_offset
= rel
->r_offset
+ 8;
6413 /* Move the current relocation to the second instruction in
6416 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6417 AARCH64_R (TLSLE_ADD_TPREL_HI12
));
6418 return bfd_reloc_continue
;
6422 /* Tiny GD->IE relaxation:
6423 adr x0, :tlsgd:var => ldr R0, :gottprel:var
6424 bl __tls_get_addr => mrs x1, tpidr_el0
6425 nop => add R0, R0, R1
6427 Where R is x for LP64, and w for Ilp32. */
6429 /* First kill the tls_get_addr reloc on the bl instruction. */
6430 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6431 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6433 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
6434 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
6435 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
6436 return bfd_reloc_continue
;
6440 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6441 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSGD_MOVW_G0_NC
));
6442 BFD_ASSERT (rel
->r_offset
+ 12 == rel
[2].r_offset
);
6443 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (CALL26
));
6447 /* Large GD->LE relaxation:
6448 movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32
6449 movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16
6450 add x0, gp, x0 => movk x0, #:tprel_g0_nc:var
6451 bl __tls_get_addr => mrs x1, tpidr_el0
6452 nop => add x0, x0, x1
6454 rel
[2].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6455 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
6456 rel
[2].r_offset
= rel
->r_offset
+ 8;
6458 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
+ 0);
6459 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
+ 4);
6460 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 8);
6461 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
6462 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
6466 /* Large GD->IE relaxation:
6467 movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16
6468 movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var
6469 add x0, gp, x0 => ldr x0, [gp, x0]
6470 bl __tls_get_addr => mrs x1, tpidr_el0
6471 nop => add x0, x0, x1
6473 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6474 bfd_putl32 (0xd2a80000, contents
+ rel
->r_offset
+ 0);
6475 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
+ 8);
6476 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
6477 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
6479 return bfd_reloc_continue
;
6481 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6482 return bfd_reloc_continue
;
6485 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6486 return bfd_reloc_continue
;
6488 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
6491 /* GD->LE relaxation:
6492 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
6494 Where R is x for lp64 mode, and w for ILP32 mode. */
6495 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6496 return bfd_reloc_continue
;
6500 /* GD->IE relaxation:
6501 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var]
6503 Where R is x for lp64 mode, and w for ILP32 mode. */
6504 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6505 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
6506 return bfd_reloc_continue
;
6509 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6512 /* GD->LE relaxation
6513 add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var
6514 bl __tls_get_addr => mrs x1, tpidr_el0
6515 nop => add R0, R1, R0
6517 Where R is x for lp64 mode, and w for ILP32 mode. */
6519 /* First kill the tls_get_addr reloc on the bl instruction. */
6520 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6521 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6523 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6524 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
6525 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
6526 return bfd_reloc_continue
;
6530 /* GD->IE relaxation
6531 ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var]
6532 BL __tls_get_addr => mrs x1, tpidr_el0
6534 NOP => add R0, R1, R0
6536 Where R is x for lp64 mode, and w for ilp32 mode. */
6538 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6540 /* Remove the relocation on the BL instruction. */
6541 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6543 /* We choose to fixup the BL and NOP instructions using the
6544 offset from the second relocation to allow flexibility in
6545 scheduling instructions between the ADD and BL. */
6546 bfd_putl32 (ldr_R0_x0
, contents
+ rel
->r_offset
);
6547 bfd_putl32 (0xd53bd041, contents
+ rel
[1].r_offset
);
6548 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
[1].r_offset
+ 4);
6549 return bfd_reloc_continue
;
6552 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
6553 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6554 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
6555 /* GD->IE/LE relaxation:
6556 add x0, x0, #:tlsdesc_lo12:var => nop
6559 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
);
6560 return bfd_reloc_ok
;
6562 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
6565 /* GD->LE relaxation:
6566 ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var
6568 Where R is x for lp64 mode, and w for ILP32 mode. */
6569 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6570 return bfd_reloc_continue
;
6574 /* GD->IE relaxation:
6575 ldr xd, [gp, xn] => ldr R0, [gp, xn]
6577 Where R is x for lp64 mode, and w for ILP32 mode. */
6578 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6579 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
6580 return bfd_reloc_ok
;
6583 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6584 /* GD->LE relaxation:
6585 movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16
6587 movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var
6589 Where R is x for lp64 mode, and w for ILP32 mode. */
6591 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
);
6592 return bfd_reloc_continue
;
6594 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6597 /* GD->LE relaxation:
6598 movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32
6600 Where R is x for lp64 mode, and w for ILP32 mode. */
6601 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
);
6602 return bfd_reloc_continue
;
6606 /* GD->IE relaxation:
6607 movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16
6609 Where R is x for lp64 mode, and w for ILP32 mode. */
6610 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6611 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6612 return bfd_reloc_continue
;
6615 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6616 /* IE->LE relaxation:
6617 adrp xd, :gottprel:var => movz Rd, :tprel_g1:var
6619 Where R is x for lp64 mode, and w for ILP32 mode. */
6622 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6623 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6624 /* We have relaxed the adrp into a mov, we may have to clear any
6625 pending erratum fixes. */
6626 clear_erratum_843419_entry (globals
, rel
->r_offset
, input_section
);
6628 return bfd_reloc_continue
;
6630 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6631 /* IE->LE relaxation:
6632 ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var
6634 Where R is x for lp64 mode, and w for ILP32 mode. */
6637 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6638 bfd_putl32 (movk_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6640 return bfd_reloc_continue
;
6642 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6643 /* LD->LE relaxation (tiny):
6644 adr x0, :tlsldm:x => mrs x0, tpidr_el0
6645 bl __tls_get_addr => add R0, R0, TCB_SIZE
6647 Where R is x for lp64 mode, and w for ilp32 mode. */
6650 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6651 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6652 /* No need of CALL26 relocation for tls_get_addr. */
6653 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6654 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
+ 0);
6655 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6656 contents
+ rel
->r_offset
+ 4);
6657 return bfd_reloc_ok
;
6659 return bfd_reloc_continue
;
6661 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6662 /* LD->LE relaxation (small):
6663 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
6667 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
);
6668 return bfd_reloc_ok
;
6670 return bfd_reloc_continue
;
6672 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6673 /* LD->LE relaxation (small):
6674 add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE
6675 bl __tls_get_addr => nop
6677 Where R is x for lp64 mode, and w for ilp32 mode. */
6680 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6681 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6682 /* No need of CALL26 relocation for tls_get_addr. */
6683 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6684 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6685 contents
+ rel
->r_offset
+ 0);
6686 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
6687 return bfd_reloc_ok
;
6689 return bfd_reloc_continue
;
6692 return bfd_reloc_continue
;
6695 return bfd_reloc_ok
;
6698 /* Relocate an AArch64 ELF section. */
6701 elfNN_aarch64_relocate_section (bfd
*output_bfd
,
6702 struct bfd_link_info
*info
,
6704 asection
*input_section
,
6706 Elf_Internal_Rela
*relocs
,
6707 Elf_Internal_Sym
*local_syms
,
6708 asection
**local_sections
)
6710 Elf_Internal_Shdr
*symtab_hdr
;
6711 struct elf_link_hash_entry
**sym_hashes
;
6712 Elf_Internal_Rela
*rel
;
6713 Elf_Internal_Rela
*relend
;
6715 struct elf_aarch64_link_hash_table
*globals
;
6716 bool save_addend
= false;
6719 globals
= elf_aarch64_hash_table (info
);
6721 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
6722 sym_hashes
= elf_sym_hashes (input_bfd
);
6725 relend
= relocs
+ input_section
->reloc_count
;
6726 for (; rel
< relend
; rel
++)
6728 unsigned int r_type
;
6729 bfd_reloc_code_real_type bfd_r_type
;
6730 bfd_reloc_code_real_type relaxed_bfd_r_type
;
6731 reloc_howto_type
*howto
;
6732 unsigned long r_symndx
;
6733 Elf_Internal_Sym
*sym
;
6735 struct elf_link_hash_entry
*h
;
6737 bfd_reloc_status_type r
;
6740 bool unresolved_reloc
= false;
6741 char *error_message
= NULL
;
6743 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6744 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6746 bfd_reloc
.howto
= elfNN_aarch64_howto_from_type (input_bfd
, r_type
);
6747 howto
= bfd_reloc
.howto
;
6750 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
6752 bfd_r_type
= elfNN_aarch64_bfd_reloc_from_howto (howto
);
6758 if (r_symndx
< symtab_hdr
->sh_info
)
6760 sym
= local_syms
+ r_symndx
;
6761 sym_type
= ELFNN_ST_TYPE (sym
->st_info
);
6762 sec
= local_sections
[r_symndx
];
6764 /* An object file might have a reference to a local
6765 undefined symbol. This is a daft object file, but we
6766 should at least do something about it. */
6767 if (r_type
!= R_AARCH64_NONE
&& r_type
!= R_AARCH64_NULL
6768 && bfd_is_und_section (sec
)
6769 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
6770 (*info
->callbacks
->undefined_symbol
)
6771 (info
, bfd_elf_string_from_elf_section
6772 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
6773 input_bfd
, input_section
, rel
->r_offset
, true);
6775 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
6777 /* Relocate against local STT_GNU_IFUNC symbol. */
6778 if (!bfd_link_relocatable (info
)
6779 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
6781 h
= elfNN_aarch64_get_local_sym_hash (globals
, input_bfd
,
6786 /* Set STT_GNU_IFUNC symbol value. */
6787 h
->root
.u
.def
.value
= sym
->st_value
;
6788 h
->root
.u
.def
.section
= sec
;
6793 bool warned
, ignored
;
6795 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
6796 r_symndx
, symtab_hdr
, sym_hashes
,
6798 unresolved_reloc
, warned
, ignored
);
6803 if (sec
!= NULL
&& discarded_section (sec
))
6804 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
6805 rel
, 1, relend
, howto
, 0, contents
);
6807 if (bfd_link_relocatable (info
))
6811 name
= h
->root
.root
.string
;
6814 name
= (bfd_elf_string_from_elf_section
6815 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
6816 if (name
== NULL
|| *name
== '\0')
6817 name
= bfd_section_name (sec
);
6821 && r_type
!= R_AARCH64_NONE
6822 && r_type
!= R_AARCH64_NULL
6824 || h
->root
.type
== bfd_link_hash_defined
6825 || h
->root
.type
== bfd_link_hash_defweak
)
6826 && IS_AARCH64_TLS_RELOC (bfd_r_type
) != (sym_type
== STT_TLS
))
6829 ((sym_type
== STT_TLS
6830 /* xgettext:c-format */
6831 ? _("%pB(%pA+%#" PRIx64
"): %s used with TLS symbol %s")
6832 /* xgettext:c-format */
6833 : _("%pB(%pA+%#" PRIx64
"): %s used with non-TLS symbol %s")),
6835 input_section
, (uint64_t) rel
->r_offset
, howto
->name
, name
);
6838 /* We relax only if we can see that there can be a valid transition
6839 from a reloc type to another.
6840 We call elfNN_aarch64_final_link_relocate unless we're completely
6841 done, i.e., the relaxation produced the final output we want. */
6843 relaxed_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
,
6845 if (relaxed_bfd_r_type
!= bfd_r_type
)
6847 bfd_r_type
= relaxed_bfd_r_type
;
6848 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
6849 BFD_ASSERT (howto
!= NULL
);
6850 r_type
= howto
->type
;
6851 r
= elfNN_aarch64_tls_relax (globals
, input_bfd
, input_section
,
6853 unresolved_reloc
= 0;
6856 r
= bfd_reloc_continue
;
6858 /* There may be multiple consecutive relocations for the
6859 same offset. In that case we are supposed to treat the
6860 output of each relocation as the addend for the next. */
6861 if (rel
+ 1 < relend
6862 && rel
->r_offset
== rel
[1].r_offset
6863 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NONE
6864 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NULL
)
6867 save_addend
= false;
6869 if (r
== bfd_reloc_continue
)
6870 r
= elfNN_aarch64_final_link_relocate (howto
, input_bfd
, output_bfd
,
6871 input_section
, contents
, rel
,
6872 relocation
, info
, sec
,
6873 h
, &unresolved_reloc
,
6874 save_addend
, &addend
, sym
);
6876 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
))
6878 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6879 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6880 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6881 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6882 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6883 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6884 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6885 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6886 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6888 bool need_relocs
= false;
6893 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6894 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6897 (!bfd_link_executable (info
) || indx
!= 0) &&
6899 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6900 || h
->root
.type
!= bfd_link_hash_undefweak
);
6902 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6906 Elf_Internal_Rela rela
;
6907 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPMOD
));
6909 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6910 globals
->root
.sgot
->output_offset
+ off
;
6913 loc
= globals
->root
.srelgot
->contents
;
6914 loc
+= globals
->root
.srelgot
->reloc_count
++
6915 * RELOC_SIZE (htab
);
6916 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6918 bfd_reloc_code_real_type real_type
=
6919 elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
6921 if (real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6922 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6923 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
)
6925 /* For local dynamic, don't generate DTPREL in any case.
6926 Initialize the DTPREL slot into zero, so we get module
6927 base address when invoke runtime TLS resolver. */
6928 bfd_put_NN (output_bfd
, 0,
6929 globals
->root
.sgot
->contents
+ off
6934 bfd_put_NN (output_bfd
,
6935 relocation
- dtpoff_base (info
),
6936 globals
->root
.sgot
->contents
+ off
6941 /* This TLS symbol is global. We emit a
6942 relocation to fixup the tls offset at load
6945 ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPREL
));
6948 (globals
->root
.sgot
->output_section
->vma
6949 + globals
->root
.sgot
->output_offset
+ off
6952 loc
= globals
->root
.srelgot
->contents
;
6953 loc
+= globals
->root
.srelgot
->reloc_count
++
6954 * RELOC_SIZE (globals
);
6955 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6956 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6957 globals
->root
.sgot
->contents
+ off
6963 bfd_put_NN (output_bfd
, (bfd_vma
) 1,
6964 globals
->root
.sgot
->contents
+ off
);
6965 bfd_put_NN (output_bfd
,
6966 relocation
- dtpoff_base (info
),
6967 globals
->root
.sgot
->contents
+ off
6971 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6975 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6976 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6977 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6978 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6979 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6980 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6982 bool need_relocs
= false;
6987 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6989 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6992 (!bfd_link_executable (info
) || indx
!= 0) &&
6994 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6995 || h
->root
.type
!= bfd_link_hash_undefweak
);
6997 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
7001 Elf_Internal_Rela rela
;
7004 rela
.r_addend
= relocation
- dtpoff_base (info
);
7008 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_TPREL
));
7009 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
7010 globals
->root
.sgot
->output_offset
+ off
;
7012 loc
= globals
->root
.srelgot
->contents
;
7013 loc
+= globals
->root
.srelgot
->reloc_count
++
7014 * RELOC_SIZE (htab
);
7016 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7018 bfd_put_NN (output_bfd
, rela
.r_addend
,
7019 globals
->root
.sgot
->contents
+ off
);
7022 bfd_put_NN (output_bfd
, relocation
- tpoff_base (info
),
7023 globals
->root
.sgot
->contents
+ off
);
7025 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
7029 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
7030 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7031 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7032 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
7033 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7034 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
7035 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
7036 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd
, h
, r_symndx
))
7038 bool need_relocs
= false;
7039 int indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
7040 bfd_vma off
= symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
);
7042 need_relocs
= (h
== NULL
7043 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
7044 || h
->root
.type
!= bfd_link_hash_undefweak
);
7046 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
7047 BFD_ASSERT (globals
->root
.sgot
!= NULL
);
7052 Elf_Internal_Rela rela
;
7053 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLSDESC
));
7056 rela
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
7057 + globals
->root
.sgotplt
->output_offset
7058 + off
+ globals
->sgotplt_jump_table_size
);
7061 rela
.r_addend
= relocation
- dtpoff_base (info
);
7063 /* Allocate the next available slot in the PLT reloc
7064 section to hold our R_AARCH64_TLSDESC, the next
7065 available slot is determined from reloc_count,
7066 which we step. But note, reloc_count was
7067 artifically moved down while allocating slots for
7068 real PLT relocs such that all of the PLT relocs
7069 will fit above the initial reloc_count and the
7070 extra stuff will fit below. */
7071 loc
= globals
->root
.srelplt
->contents
;
7072 loc
+= globals
->root
.srelplt
->reloc_count
++
7073 * RELOC_SIZE (globals
);
7075 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7077 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
7078 globals
->root
.sgotplt
->contents
+ off
+
7079 globals
->sgotplt_jump_table_size
);
7080 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
7081 globals
->root
.sgotplt
->contents
+ off
+
7082 globals
->sgotplt_jump_table_size
+
7086 symbol_tlsdesc_got_offset_mark (input_bfd
, h
, r_symndx
);
7093 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
7094 because such sections are not SEC_ALLOC and thus ld.so will
7095 not process them. */
7096 if (unresolved_reloc
7097 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
7099 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
7100 +rel
->r_offset
) != (bfd_vma
) - 1)
7103 /* xgettext:c-format */
7104 (_("%pB(%pA+%#" PRIx64
"): "
7105 "unresolvable %s relocation against symbol `%s'"),
7106 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, howto
->name
,
7107 h
->root
.root
.string
);
7111 if (r
!= bfd_reloc_ok
&& r
!= bfd_reloc_continue
)
7113 bfd_reloc_code_real_type real_r_type
7114 = elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
7118 case bfd_reloc_overflow
:
7119 (*info
->callbacks
->reloc_overflow
)
7120 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
, (bfd_vma
) 0,
7121 input_bfd
, input_section
, rel
->r_offset
);
7122 if (real_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
7123 || real_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
7125 (*info
->callbacks
->warning
)
7127 _("too many GOT entries for -fpic, "
7128 "please recompile with -fPIC"),
7129 name
, input_bfd
, input_section
, rel
->r_offset
);
7132 /* Overflow can occur when a variable is referenced with a type
7133 that has a larger alignment than the type with which it was
7135 file1.c: extern int foo; int a (void) { return foo; }
7136 file2.c: char bar, foo, baz;
7137 If the variable is placed into a data section at an offset
7138 that is incompatible with the larger alignment requirement
7139 overflow will occur. (Strictly speaking this is not overflow
7140 but rather an alignment problem, but the bfd_reloc_ error
7141 enum does not have a value to cover that situation).
7143 Try to catch this situation here and provide a more helpful
7144 error message to the user. */
7145 if (addend
& (((bfd_vma
) 1 << howto
->rightshift
) - 1)
7146 /* FIXME: Are we testing all of the appropriate reloc
7148 && (real_r_type
== BFD_RELOC_AARCH64_LD_LO19_PCREL
7149 || real_r_type
== BFD_RELOC_AARCH64_LDST16_LO12
7150 || real_r_type
== BFD_RELOC_AARCH64_LDST32_LO12
7151 || real_r_type
== BFD_RELOC_AARCH64_LDST64_LO12
7152 || real_r_type
== BFD_RELOC_AARCH64_LDST128_LO12
))
7154 info
->callbacks
->warning
7155 (info
, _("one possible cause of this error is that the \
7156 symbol is being referenced in the indicated code as if it had a larger \
7157 alignment than was declared where it was defined"),
7158 name
, input_bfd
, input_section
, rel
->r_offset
);
7162 case bfd_reloc_undefined
:
7163 (*info
->callbacks
->undefined_symbol
)
7164 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, true);
7167 case bfd_reloc_outofrange
:
7168 error_message
= _("out of range");
7171 case bfd_reloc_notsupported
:
7172 error_message
= _("unsupported relocation");
7175 case bfd_reloc_dangerous
:
7176 /* error_message should already be set. */
7180 error_message
= _("unknown error");
7184 BFD_ASSERT (error_message
!= NULL
);
7185 (*info
->callbacks
->reloc_dangerous
)
7186 (info
, error_message
, input_bfd
, input_section
, rel
->r_offset
);
7198 /* Set the right machine number. */
7201 elfNN_aarch64_object_p (bfd
*abfd
)
7204 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64_ilp32
);
7206 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64
);
7211 /* Function to keep AArch64 specific flags in the ELF header. */
7214 elfNN_aarch64_set_private_flags (bfd
*abfd
, flagword flags
)
7216 if (elf_flags_init (abfd
) && elf_elfheader (abfd
)->e_flags
!= flags
)
7221 elf_elfheader (abfd
)->e_flags
= flags
;
7222 elf_flags_init (abfd
) = true;
7228 /* Merge backend specific data from an object file to the output
7229 object file when linking. */
7232 elfNN_aarch64_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
7234 bfd
*obfd
= info
->output_bfd
;
7237 bool flags_compatible
= true;
7240 /* Check if we have the same endianess. */
7241 if (!_bfd_generic_verify_endian_match (ibfd
, info
))
7244 if (!is_aarch64_elf (ibfd
) || !is_aarch64_elf (obfd
))
7247 /* The input BFD must have had its flags initialised. */
7248 /* The following seems bogus to me -- The flags are initialized in
7249 the assembler but I don't think an elf_flags_init field is
7250 written into the object. */
7251 /* BFD_ASSERT (elf_flags_init (ibfd)); */
7253 in_flags
= elf_elfheader (ibfd
)->e_flags
;
7254 out_flags
= elf_elfheader (obfd
)->e_flags
;
7256 if (!elf_flags_init (obfd
))
7258 /* If the input is the default architecture and had the default
7259 flags then do not bother setting the flags for the output
7260 architecture, instead allow future merges to do this. If no
7261 future merges ever set these flags then they will retain their
7262 uninitialised values, which surprise surprise, correspond
7263 to the default values. */
7264 if (bfd_get_arch_info (ibfd
)->the_default
7265 && elf_elfheader (ibfd
)->e_flags
== 0)
7268 elf_flags_init (obfd
) = true;
7269 elf_elfheader (obfd
)->e_flags
= in_flags
;
7271 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
7272 && bfd_get_arch_info (obfd
)->the_default
)
7273 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
7274 bfd_get_mach (ibfd
));
7279 /* Identical flags must be compatible. */
7280 if (in_flags
== out_flags
)
7283 /* Check to see if the input BFD actually contains any sections. If
7284 not, its flags may not have been initialised either, but it
7285 cannot actually cause any incompatiblity. Do not short-circuit
7286 dynamic objects; their section list may be emptied by
7287 elf_link_add_object_symbols.
7289 Also check to see if there are no code sections in the input.
7290 In this case there is no need to check for code specific flags.
7291 XXX - do we need to worry about floating-point format compatability
7292 in data sections ? */
7293 if (!(ibfd
->flags
& DYNAMIC
))
7295 bool null_input_bfd
= true;
7296 bool only_data_sections
= true;
7298 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
7300 if ((bfd_section_flags (sec
)
7301 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
7302 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
7303 only_data_sections
= false;
7305 null_input_bfd
= false;
7309 if (null_input_bfd
|| only_data_sections
)
7313 return flags_compatible
;
7316 /* Display the flags field. */
7319 elfNN_aarch64_print_private_bfd_data (bfd
*abfd
, void *ptr
)
7321 FILE *file
= (FILE *) ptr
;
7322 unsigned long flags
;
7324 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
7326 /* Print normal ELF private data. */
7327 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
7329 flags
= elf_elfheader (abfd
)->e_flags
;
7330 /* Ignore init flag - it may not be set, despite the flags field
7331 containing valid data. */
7333 /* xgettext:c-format */
7334 fprintf (file
, _("private flags = 0x%lx:"), elf_elfheader (abfd
)->e_flags
);
7337 fprintf (file
, _(" <Unrecognised flag bits set>"));
7344 /* Return true if we need copy relocation against EH. */
7347 need_copy_relocation_p (struct elf_aarch64_link_hash_entry
*eh
)
7349 struct elf_dyn_relocs
*p
;
7352 for (p
= eh
->root
.dyn_relocs
; p
!= NULL
; p
= p
->next
)
7354 /* If there is any pc-relative reference, we need to keep copy relocation
7355 to avoid propagating the relocation into runtime that current glibc
7356 does not support. */
7360 s
= p
->sec
->output_section
;
7361 /* Need copy relocation if it's against read-only section. */
7362 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
7369 /* Adjust a symbol defined by a dynamic object and referenced by a
7370 regular object. The current definition is in some section of the
7371 dynamic object, but we're not including those sections. We have to
7372 change the definition to something the rest of the link can
7376 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
7377 struct elf_link_hash_entry
*h
)
7379 struct elf_aarch64_link_hash_table
*htab
;
7382 /* If this is a function, put it in the procedure linkage table. We
7383 will fill in the contents of the procedure linkage table later,
7384 when we know the address of the .got section. */
7385 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
7387 if (h
->plt
.refcount
<= 0
7388 || (h
->type
!= STT_GNU_IFUNC
7389 && (SYMBOL_CALLS_LOCAL (info
, h
)
7390 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
7391 && h
->root
.type
== bfd_link_hash_undefweak
))))
7393 /* This case can occur if we saw a CALL26 reloc in
7394 an input file, but the symbol wasn't referred to
7395 by a dynamic object or all references were
7396 garbage collected. In which case we can end up
7398 h
->plt
.offset
= (bfd_vma
) - 1;
7405 /* Otherwise, reset to -1. */
7406 h
->plt
.offset
= (bfd_vma
) - 1;
7409 /* If this is a weak symbol, and there is a real definition, the
7410 processor independent code will have arranged for us to see the
7411 real definition first, and we can just use the same value. */
7412 if (h
->is_weakalias
)
7414 struct elf_link_hash_entry
*def
= weakdef (h
);
7415 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
7416 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
7417 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
7418 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
7419 h
->non_got_ref
= def
->non_got_ref
;
7423 /* If we are creating a shared library, we must presume that the
7424 only references to the symbol are via the global offset table.
7425 For such cases we need not do anything here; the relocations will
7426 be handled correctly by relocate_section. */
7427 if (bfd_link_pic (info
))
7430 /* If there are no references to this symbol that do not use the
7431 GOT, we don't need to generate a copy reloc. */
7432 if (!h
->non_got_ref
)
7435 /* If -z nocopyreloc was given, we won't generate them either. */
7436 if (info
->nocopyreloc
)
7442 if (ELIMINATE_COPY_RELOCS
)
7444 struct elf_aarch64_link_hash_entry
*eh
;
7445 /* If we don't find any dynamic relocs in read-only sections, then
7446 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7447 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
7448 if (!need_copy_relocation_p (eh
))
7455 /* We must allocate the symbol in our .dynbss section, which will
7456 become part of the .bss section of the executable. There will be
7457 an entry for this symbol in the .dynsym section. The dynamic
7458 object will contain position independent code, so all references
7459 from the dynamic object to this symbol will go through the global
7460 offset table. The dynamic linker will use the .dynsym entry to
7461 determine the address it must put in the global offset table, so
7462 both the dynamic object and the regular object will refer to the
7463 same memory location for the variable. */
7465 htab
= elf_aarch64_hash_table (info
);
7467 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
7468 to copy the initial value out of the dynamic object and into the
7469 runtime process image. */
7470 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
7472 s
= htab
->root
.sdynrelro
;
7473 srel
= htab
->root
.sreldynrelro
;
7477 s
= htab
->root
.sdynbss
;
7478 srel
= htab
->root
.srelbss
;
7480 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
7482 srel
->size
+= RELOC_SIZE (htab
);
7486 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
7491 elfNN_aarch64_allocate_local_symbols (bfd
*abfd
, unsigned number
)
7493 struct elf_aarch64_local_symbol
*locals
;
7494 locals
= elf_aarch64_locals (abfd
);
7497 locals
= (struct elf_aarch64_local_symbol
*)
7498 bfd_zalloc (abfd
, number
* sizeof (struct elf_aarch64_local_symbol
));
7501 elf_aarch64_locals (abfd
) = locals
;
7506 /* Create the .got section to hold the global offset table. */
7509 aarch64_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
7511 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7514 struct elf_link_hash_entry
*h
;
7515 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7517 /* This function may be called more than once. */
7518 if (htab
->sgot
!= NULL
)
7521 flags
= bed
->dynamic_sec_flags
;
7523 s
= bfd_make_section_anyway_with_flags (abfd
,
7524 (bed
->rela_plts_and_copies_p
7525 ? ".rela.got" : ".rel.got"),
7526 (bed
->dynamic_sec_flags
7529 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
7533 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
7535 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
7538 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
7540 if (bed
->want_got_sym
)
7542 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
7543 (or .got.plt) section. We don't do this in the linker script
7544 because we don't want to define the symbol if we are not creating
7545 a global offset table. */
7546 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
7547 "_GLOBAL_OFFSET_TABLE_");
7548 elf_hash_table (info
)->hgot
= h
;
7553 if (bed
->want_got_plt
)
7555 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
7557 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
7562 /* The first bit of the global offset table is the header. */
7563 s
->size
+= bed
->got_header_size
;
7568 /* Look through the relocs for a section during the first phase. */
7571 elfNN_aarch64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
7572 asection
*sec
, const Elf_Internal_Rela
*relocs
)
7574 Elf_Internal_Shdr
*symtab_hdr
;
7575 struct elf_link_hash_entry
**sym_hashes
;
7576 const Elf_Internal_Rela
*rel
;
7577 const Elf_Internal_Rela
*rel_end
;
7580 struct elf_aarch64_link_hash_table
*htab
;
7582 if (bfd_link_relocatable (info
))
7585 BFD_ASSERT (is_aarch64_elf (abfd
));
7587 htab
= elf_aarch64_hash_table (info
);
7590 symtab_hdr
= &elf_symtab_hdr (abfd
);
7591 sym_hashes
= elf_sym_hashes (abfd
);
7593 rel_end
= relocs
+ sec
->reloc_count
;
7594 for (rel
= relocs
; rel
< rel_end
; rel
++)
7596 struct elf_link_hash_entry
*h
;
7597 unsigned int r_symndx
;
7598 unsigned int r_type
;
7599 bfd_reloc_code_real_type bfd_r_type
;
7600 Elf_Internal_Sym
*isym
;
7602 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
7603 r_type
= ELFNN_R_TYPE (rel
->r_info
);
7605 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
7607 /* xgettext:c-format */
7608 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd
, r_symndx
);
7612 if (r_symndx
< symtab_hdr
->sh_info
)
7614 /* A local symbol. */
7615 isym
= bfd_sym_from_r_symndx (&htab
->root
.sym_cache
,
7620 /* Check relocation against local STT_GNU_IFUNC symbol. */
7621 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
7623 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
,
7628 /* Fake a STT_GNU_IFUNC symbol. */
7629 h
->type
= STT_GNU_IFUNC
;
7632 h
->forced_local
= 1;
7633 h
->root
.type
= bfd_link_hash_defined
;
7640 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
7641 while (h
->root
.type
== bfd_link_hash_indirect
7642 || h
->root
.type
== bfd_link_hash_warning
)
7643 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7646 /* Could be done earlier, if h were already available. */
7647 bfd_r_type
= aarch64_tls_transition (abfd
, info
, r_type
, h
, r_symndx
);
7651 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
7652 This shows up in particular in an R_AARCH64_PREL64 in large model
7653 when calculating the pc-relative address to .got section which is
7654 used to initialize the gp register. */
7655 if (h
->root
.root
.string
7656 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
7658 if (htab
->root
.dynobj
== NULL
)
7659 htab
->root
.dynobj
= abfd
;
7661 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7664 BFD_ASSERT (h
== htab
->root
.hgot
);
7667 /* Create the ifunc sections for static executables. If we
7668 never see an indirect function symbol nor we are building
7669 a static executable, those sections will be empty and
7670 won't appear in output. */
7676 case BFD_RELOC_AARCH64_ADD_LO12
:
7677 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7678 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7679 case BFD_RELOC_AARCH64_CALL26
:
7680 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7681 case BFD_RELOC_AARCH64_JUMP26
:
7682 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7683 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7684 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7685 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7686 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7687 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7688 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7689 case BFD_RELOC_AARCH64_NN
:
7690 if (htab
->root
.dynobj
== NULL
)
7691 htab
->root
.dynobj
= abfd
;
7692 if (!_bfd_elf_create_ifunc_sections (htab
->root
.dynobj
, info
))
7697 /* It is referenced by a non-shared object. */
7703 case BFD_RELOC_AARCH64_16
:
7705 case BFD_RELOC_AARCH64_32
:
7707 if (bfd_link_pic (info
) && (sec
->flags
& SEC_ALLOC
) != 0)
7710 /* This is an absolute symbol. It represents a value instead
7712 && (bfd_is_abs_symbol (&h
->root
)
7713 /* This is an undefined symbol. */
7714 || h
->root
.type
== bfd_link_hash_undefined
))
7717 /* For local symbols, defined global symbols in a non-ABS section,
7718 it is assumed that the value is an address. */
7719 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7721 /* xgettext:c-format */
7722 (_("%pB: relocation %s against `%s' can not be used when making "
7724 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7725 (h
) ? h
->root
.root
.string
: "a local symbol");
7726 bfd_set_error (bfd_error_bad_value
);
7732 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
7733 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
7734 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
7735 case BFD_RELOC_AARCH64_MOVW_G3
:
7736 if (bfd_link_pic (info
))
7738 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7740 /* xgettext:c-format */
7741 (_("%pB: relocation %s against `%s' can not be used when making "
7742 "a shared object; recompile with -fPIC"),
7743 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7744 (h
) ? h
->root
.root
.string
: "a local symbol");
7745 bfd_set_error (bfd_error_bad_value
);
7750 case BFD_RELOC_AARCH64_16_PCREL
:
7751 case BFD_RELOC_AARCH64_32_PCREL
:
7752 case BFD_RELOC_AARCH64_64_PCREL
:
7753 case BFD_RELOC_AARCH64_ADD_LO12
:
7754 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
7755 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7756 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
7757 case BFD_RELOC_AARCH64_LDST128_LO12
:
7758 case BFD_RELOC_AARCH64_LDST16_LO12
:
7759 case BFD_RELOC_AARCH64_LDST32_LO12
:
7760 case BFD_RELOC_AARCH64_LDST64_LO12
:
7761 case BFD_RELOC_AARCH64_LDST8_LO12
:
7762 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
7763 if (h
== NULL
|| bfd_link_pic (info
))
7767 case BFD_RELOC_AARCH64_NN
:
7769 /* We don't need to handle relocs into sections not going into
7770 the "real" output. */
7771 if ((sec
->flags
& SEC_ALLOC
) == 0)
7776 if (!bfd_link_pic (info
))
7779 h
->plt
.refcount
+= 1;
7780 h
->pointer_equality_needed
= 1;
7783 /* No need to do anything if we're not creating a shared
7785 if (!(bfd_link_pic (info
)
7786 /* If on the other hand, we are creating an executable, we
7787 may need to keep relocations for symbols satisfied by a
7788 dynamic library if we manage to avoid copy relocs for the
7791 NOTE: Currently, there is no support of copy relocs
7792 elimination on pc-relative relocation types, because there is
7793 no dynamic relocation support for them in glibc. We still
7794 record the dynamic symbol reference for them. This is
7795 because one symbol may be referenced by both absolute
7796 relocation (for example, BFD_RELOC_AARCH64_NN) and
7797 pc-relative relocation. We need full symbol reference
7798 information to make correct decision later in
7799 elfNN_aarch64_adjust_dynamic_symbol. */
7800 || (ELIMINATE_COPY_RELOCS
7801 && !bfd_link_pic (info
)
7803 && (h
->root
.type
== bfd_link_hash_defweak
7804 || !h
->def_regular
))))
7808 struct elf_dyn_relocs
*p
;
7809 struct elf_dyn_relocs
**head
;
7810 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7812 /* We must copy these reloc types into the output file.
7813 Create a reloc section in dynobj and make room for
7817 if (htab
->root
.dynobj
== NULL
)
7818 htab
->root
.dynobj
= abfd
;
7820 sreloc
= _bfd_elf_make_dynamic_reloc_section
7821 (sec
, htab
->root
.dynobj
, LOG_FILE_ALIGN
, abfd
, /*rela? */ true);
7827 /* If this is a global symbol, we count the number of
7828 relocations we need for this symbol. */
7831 head
= &h
->dyn_relocs
;
7835 /* Track dynamic relocs needed for local syms too.
7836 We really need local syms available to do this
7842 isym
= bfd_sym_from_r_symndx (&htab
->root
.sym_cache
,
7847 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
7851 /* Beware of type punned pointers vs strict aliasing
7853 vpp
= &(elf_section_data (s
)->local_dynrel
);
7854 head
= (struct elf_dyn_relocs
**) vpp
;
7858 if (p
== NULL
|| p
->sec
!= sec
)
7860 size_t amt
= sizeof *p
;
7861 p
= ((struct elf_dyn_relocs
*)
7862 bfd_zalloc (htab
->root
.dynobj
, amt
));
7872 if (elfNN_aarch64_howto_table
[howto_index
].pc_relative
)
7877 /* RR: We probably want to keep a consistency check that
7878 there are no dangling GOT_PAGE relocs. */
7879 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7880 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7881 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7882 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7883 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7884 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7885 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7886 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7887 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7888 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
7889 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7890 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7891 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
7892 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
7893 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7894 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
7895 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
7896 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
7897 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
7898 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
7899 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
7900 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
7901 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
7902 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
7903 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
7904 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
7905 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
7906 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
7907 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
7908 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
7909 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
7912 unsigned old_got_type
;
7914 got_type
= aarch64_reloc_got_type (bfd_r_type
);
7918 h
->got
.refcount
+= 1;
7919 old_got_type
= elf_aarch64_hash_entry (h
)->got_type
;
7923 struct elf_aarch64_local_symbol
*locals
;
7925 if (!elfNN_aarch64_allocate_local_symbols
7926 (abfd
, symtab_hdr
->sh_info
))
7929 locals
= elf_aarch64_locals (abfd
);
7930 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7931 locals
[r_symndx
].got_refcount
+= 1;
7932 old_got_type
= locals
[r_symndx
].got_type
;
7935 /* If a variable is accessed with both general dynamic TLS
7936 methods, two slots may be created. */
7937 if (GOT_TLS_GD_ANY_P (old_got_type
) && GOT_TLS_GD_ANY_P (got_type
))
7938 got_type
|= old_got_type
;
7940 /* We will already have issued an error message if there
7941 is a TLS/non-TLS mismatch, based on the symbol type.
7942 So just combine any TLS types needed. */
7943 if (old_got_type
!= GOT_UNKNOWN
&& old_got_type
!= GOT_NORMAL
7944 && got_type
!= GOT_NORMAL
)
7945 got_type
|= old_got_type
;
7947 /* If the symbol is accessed by both IE and GD methods, we
7948 are able to relax. Turn off the GD flag, without
7949 messing up with any other kind of TLS types that may be
7951 if ((got_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (got_type
))
7952 got_type
&= ~ (GOT_TLSDESC_GD
| GOT_TLS_GD
);
7954 if (old_got_type
!= got_type
)
7957 elf_aarch64_hash_entry (h
)->got_type
= got_type
;
7960 struct elf_aarch64_local_symbol
*locals
;
7961 locals
= elf_aarch64_locals (abfd
);
7962 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7963 locals
[r_symndx
].got_type
= got_type
;
7967 if (htab
->root
.dynobj
== NULL
)
7968 htab
->root
.dynobj
= abfd
;
7969 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7974 case BFD_RELOC_AARCH64_CALL26
:
7975 case BFD_RELOC_AARCH64_JUMP26
:
7976 /* If this is a local symbol then we resolve it
7977 directly without creating a PLT entry. */
7982 if (h
->plt
.refcount
<= 0)
7983 h
->plt
.refcount
= 1;
7985 h
->plt
.refcount
+= 1;
7996 /* Treat mapping symbols as special target symbols. */
7999 elfNN_aarch64_is_target_special_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
8002 return bfd_is_aarch64_special_symbol_name (sym
->name
,
8003 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
);
8006 /* If the ELF symbol SYM might be a function in SEC, return the
8007 function size and set *CODE_OFF to the function's entry point,
8008 otherwise return zero. */
8010 static bfd_size_type
8011 elfNN_aarch64_maybe_function_sym (const asymbol
*sym
, asection
*sec
,
8015 elf_symbol_type
* elf_sym
= (elf_symbol_type
*) sym
;
8017 if ((sym
->flags
& (BSF_SECTION_SYM
| BSF_FILE
| BSF_OBJECT
8018 | BSF_THREAD_LOCAL
| BSF_RELC
| BSF_SRELC
)) != 0
8019 || sym
->section
!= sec
)
8022 size
= (sym
->flags
& BSF_SYNTHETIC
) ? 0 : elf_sym
->internal_elf_sym
.st_size
;
8024 if (!(sym
->flags
& BSF_SYNTHETIC
))
8025 switch (ELF_ST_TYPE (elf_sym
->internal_elf_sym
.st_info
))
8028 /* Ignore symbols created by the annobin plugin for gcc and clang.
8029 These symbols are hidden, local, notype and have a size of 0. */
8031 && sym
->flags
& BSF_LOCAL
8032 && ELF_ST_VISIBILITY (elf_sym
->internal_elf_sym
.st_other
) == STV_HIDDEN
)
8036 /* FIXME: Allow STT_GNU_IFUNC as well ? */
8042 if ((sym
->flags
& BSF_LOCAL
)
8043 && bfd_is_aarch64_special_symbol_name (sym
->name
,
8044 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
))
8047 *code_off
= sym
->value
;
8049 /* Do not return 0 for the function's size. */
8050 return size
? size
: 1;
8054 elfNN_aarch64_find_inliner_info (bfd
*abfd
,
8055 const char **filename_ptr
,
8056 const char **functionname_ptr
,
8057 unsigned int *line_ptr
)
8060 found
= _bfd_dwarf2_find_inliner_info
8061 (abfd
, filename_ptr
,
8062 functionname_ptr
, line_ptr
, &elf_tdata (abfd
)->dwarf2_find_line_info
);
8068 elfNN_aarch64_init_file_header (bfd
*abfd
, struct bfd_link_info
*link_info
)
8070 Elf_Internal_Ehdr
*i_ehdrp
; /* ELF file header, internal form. */
8072 if (!_bfd_elf_init_file_header (abfd
, link_info
))
8075 i_ehdrp
= elf_elfheader (abfd
);
8076 i_ehdrp
->e_ident
[EI_ABIVERSION
] = AARCH64_ELF_ABI_VERSION
;
8080 static enum elf_reloc_type_class
8081 elfNN_aarch64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
8082 const asection
*rel_sec ATTRIBUTE_UNUSED
,
8083 const Elf_Internal_Rela
*rela
)
8085 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
8087 if (htab
->root
.dynsym
!= NULL
8088 && htab
->root
.dynsym
->contents
!= NULL
)
8090 /* Check relocation against STT_GNU_IFUNC symbol if there are
8092 bfd
*abfd
= info
->output_bfd
;
8093 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8094 unsigned long r_symndx
= ELFNN_R_SYM (rela
->r_info
);
8095 if (r_symndx
!= STN_UNDEF
)
8097 Elf_Internal_Sym sym
;
8098 if (!bed
->s
->swap_symbol_in (abfd
,
8099 (htab
->root
.dynsym
->contents
8100 + r_symndx
* bed
->s
->sizeof_sym
),
8103 /* xgettext:c-format */
8104 _bfd_error_handler (_("%pB symbol number %lu references"
8105 " nonexistent SHT_SYMTAB_SHNDX section"),
8107 /* Ideally an error class should be returned here. */
8109 else if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
8110 return reloc_class_ifunc
;
8114 switch ((int) ELFNN_R_TYPE (rela
->r_info
))
8116 case AARCH64_R (IRELATIVE
):
8117 return reloc_class_ifunc
;
8118 case AARCH64_R (RELATIVE
):
8119 return reloc_class_relative
;
8120 case AARCH64_R (JUMP_SLOT
):
8121 return reloc_class_plt
;
8122 case AARCH64_R (COPY
):
8123 return reloc_class_copy
;
8125 return reloc_class_normal
;
8129 /* Handle an AArch64 specific section when reading an object file. This is
8130 called when bfd_section_from_shdr finds a section with an unknown
8134 elfNN_aarch64_section_from_shdr (bfd
*abfd
,
8135 Elf_Internal_Shdr
*hdr
,
8136 const char *name
, int shindex
)
8138 /* There ought to be a place to keep ELF backend specific flags, but
8139 at the moment there isn't one. We just keep track of the
8140 sections by their name, instead. Fortunately, the ABI gives
8141 names for all the AArch64 specific sections, so we will probably get
8143 switch (hdr
->sh_type
)
8145 case SHT_AARCH64_ATTRIBUTES
:
8152 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
8158 /* A structure used to record a list of sections, independently
8159 of the next and prev fields in the asection structure. */
8160 typedef struct section_list
8163 struct section_list
*next
;
8164 struct section_list
*prev
;
8168 /* Unfortunately we need to keep a list of sections for which
8169 an _aarch64_elf_section_data structure has been allocated. This
8170 is because it is possible for functions like elfNN_aarch64_write_section
8171 to be called on a section which has had an elf_data_structure
8172 allocated for it (and so the used_by_bfd field is valid) but
8173 for which the AArch64 extended version of this structure - the
8174 _aarch64_elf_section_data structure - has not been allocated. */
8175 static section_list
*sections_with_aarch64_elf_section_data
= NULL
;
8178 record_section_with_aarch64_elf_section_data (asection
*sec
)
8180 struct section_list
*entry
;
8182 entry
= bfd_malloc (sizeof (*entry
));
8186 entry
->next
= sections_with_aarch64_elf_section_data
;
8188 if (entry
->next
!= NULL
)
8189 entry
->next
->prev
= entry
;
8190 sections_with_aarch64_elf_section_data
= entry
;
8193 static struct section_list
*
8194 find_aarch64_elf_section_entry (asection
*sec
)
8196 struct section_list
*entry
;
8197 static struct section_list
*last_entry
= NULL
;
8199 /* This is a short cut for the typical case where the sections are added
8200 to the sections_with_aarch64_elf_section_data list in forward order and
8201 then looked up here in backwards order. This makes a real difference
8202 to the ld-srec/sec64k.exp linker test. */
8203 entry
= sections_with_aarch64_elf_section_data
;
8204 if (last_entry
!= NULL
)
8206 if (last_entry
->sec
== sec
)
8208 else if (last_entry
->next
!= NULL
&& last_entry
->next
->sec
== sec
)
8209 entry
= last_entry
->next
;
8212 for (; entry
; entry
= entry
->next
)
8213 if (entry
->sec
== sec
)
8217 /* Record the entry prior to this one - it is the entry we are
8218 most likely to want to locate next time. Also this way if we
8219 have been called from
8220 unrecord_section_with_aarch64_elf_section_data () we will not
8221 be caching a pointer that is about to be freed. */
8222 last_entry
= entry
->prev
;
8228 unrecord_section_with_aarch64_elf_section_data (asection
*sec
)
8230 struct section_list
*entry
;
8232 entry
= find_aarch64_elf_section_entry (sec
);
8236 if (entry
->prev
!= NULL
)
8237 entry
->prev
->next
= entry
->next
;
8238 if (entry
->next
!= NULL
)
8239 entry
->next
->prev
= entry
->prev
;
8240 if (entry
== sections_with_aarch64_elf_section_data
)
8241 sections_with_aarch64_elf_section_data
= entry
->next
;
8250 struct bfd_link_info
*info
;
8253 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
8254 asection
*, struct elf_link_hash_entry
*);
8255 } output_arch_syminfo
;
8257 enum map_symbol_type
8264 /* Output a single mapping symbol. */
8267 elfNN_aarch64_output_map_sym (output_arch_syminfo
*osi
,
8268 enum map_symbol_type type
, bfd_vma offset
)
8270 static const char *names
[2] = { "$x", "$d" };
8271 Elf_Internal_Sym sym
;
8273 sym
.st_value
= (osi
->sec
->output_section
->vma
8274 + osi
->sec
->output_offset
+ offset
);
8277 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
8278 sym
.st_shndx
= osi
->sec_shndx
;
8279 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
8282 /* Output a single local symbol for a generated stub. */
8285 elfNN_aarch64_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
8286 bfd_vma offset
, bfd_vma size
)
8288 Elf_Internal_Sym sym
;
8290 sym
.st_value
= (osi
->sec
->output_section
->vma
8291 + osi
->sec
->output_offset
+ offset
);
8294 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
8295 sym
.st_shndx
= osi
->sec_shndx
;
8296 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
8300 aarch64_map_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
8302 struct elf_aarch64_stub_hash_entry
*stub_entry
;
8306 output_arch_syminfo
*osi
;
8308 /* Massage our args to the form they really have. */
8309 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
8310 osi
= (output_arch_syminfo
*) in_arg
;
8312 stub_sec
= stub_entry
->stub_sec
;
8314 /* Ensure this stub is attached to the current section being
8316 if (stub_sec
!= osi
->sec
)
8319 addr
= (bfd_vma
) stub_entry
->stub_offset
;
8321 stub_name
= stub_entry
->output_name
;
8323 switch (stub_entry
->stub_type
)
8325 case aarch64_stub_adrp_branch
:
8326 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
8327 sizeof (aarch64_adrp_branch_stub
)))
8329 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8332 case aarch64_stub_long_branch
:
8333 if (!elfNN_aarch64_output_stub_sym
8334 (osi
, stub_name
, addr
, sizeof (aarch64_long_branch_stub
)))
8336 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8338 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_DATA
, addr
+ 16))
8341 case aarch64_stub_erratum_835769_veneer
:
8342 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
8343 sizeof (aarch64_erratum_835769_stub
)))
8345 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8348 case aarch64_stub_erratum_843419_veneer
:
8349 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
8350 sizeof (aarch64_erratum_843419_stub
)))
8352 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8355 case aarch64_stub_none
:
8365 /* Output mapping symbols for linker generated sections. */
8368 elfNN_aarch64_output_arch_local_syms (bfd
*output_bfd
,
8369 struct bfd_link_info
*info
,
8371 int (*func
) (void *, const char *,
8374 struct elf_link_hash_entry
8377 output_arch_syminfo osi
;
8378 struct elf_aarch64_link_hash_table
*htab
;
8380 htab
= elf_aarch64_hash_table (info
);
8386 /* Long calls stubs. */
8387 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
8391 for (stub_sec
= htab
->stub_bfd
->sections
;
8392 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
8394 /* Ignore non-stub sections. */
8395 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
8400 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
8401 (output_bfd
, osi
.sec
->output_section
);
8403 /* The first instruction in a stub is always a branch. */
8404 if (!elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0))
8407 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_map_one_stub
,
8412 /* Finally, output mapping symbols for the PLT. */
8413 if (!htab
->root
.splt
|| htab
->root
.splt
->size
== 0)
8416 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
8417 (output_bfd
, htab
->root
.splt
->output_section
);
8418 osi
.sec
= htab
->root
.splt
;
8420 elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0);
8426 /* Allocate target specific section data. */
8429 elfNN_aarch64_new_section_hook (bfd
*abfd
, asection
*sec
)
8431 if (!sec
->used_by_bfd
)
8433 _aarch64_elf_section_data
*sdata
;
8434 size_t amt
= sizeof (*sdata
);
8436 sdata
= bfd_zalloc (abfd
, amt
);
8439 sec
->used_by_bfd
= sdata
;
8442 record_section_with_aarch64_elf_section_data (sec
);
8444 return _bfd_elf_new_section_hook (abfd
, sec
);
8449 unrecord_section_via_map_over_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
8451 void *ignore ATTRIBUTE_UNUSED
)
8453 unrecord_section_with_aarch64_elf_section_data (sec
);
8457 elfNN_aarch64_close_and_cleanup (bfd
*abfd
)
8460 bfd_map_over_sections (abfd
,
8461 unrecord_section_via_map_over_sections
, NULL
);
8463 return _bfd_elf_close_and_cleanup (abfd
);
8467 elfNN_aarch64_bfd_free_cached_info (bfd
*abfd
)
8470 bfd_map_over_sections (abfd
,
8471 unrecord_section_via_map_over_sections
, NULL
);
8473 return _bfd_free_cached_info (abfd
);
8476 /* Create dynamic sections. This is different from the ARM backend in that
8477 the got, plt, gotplt and their relocation sections are all created in the
8478 standard part of the bfd elf backend. */
8481 elfNN_aarch64_create_dynamic_sections (bfd
*dynobj
,
8482 struct bfd_link_info
*info
)
8484 /* We need to create .got section. */
8485 if (!aarch64_elf_create_got_section (dynobj
, info
))
8488 return _bfd_elf_create_dynamic_sections (dynobj
, info
);
8492 /* Allocate space in .plt, .got and associated reloc sections for
8496 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
8498 struct bfd_link_info
*info
;
8499 struct elf_aarch64_link_hash_table
*htab
;
8500 struct elf_aarch64_link_hash_entry
*eh
;
8501 struct elf_dyn_relocs
*p
;
8503 /* An example of a bfd_link_hash_indirect symbol is versioned
8504 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8505 -> __gxx_personality_v0(bfd_link_hash_defined)
8507 There is no need to process bfd_link_hash_indirect symbols here
8508 because we will also be presented with the concrete instance of
8509 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8510 called to copy all relevant data from the generic to the concrete
8512 if (h
->root
.type
== bfd_link_hash_indirect
)
8515 if (h
->root
.type
== bfd_link_hash_warning
)
8516 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8518 info
= (struct bfd_link_info
*) inf
;
8519 htab
= elf_aarch64_hash_table (info
);
8521 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8522 here if it is defined and referenced in a non-shared object. */
8523 if (h
->type
== STT_GNU_IFUNC
8526 else if (htab
->root
.dynamic_sections_created
&& h
->plt
.refcount
> 0)
8528 /* Make sure this symbol is output as a dynamic symbol.
8529 Undefined weak syms won't yet be marked as dynamic. */
8530 if (h
->dynindx
== -1 && !h
->forced_local
8531 && h
->root
.type
== bfd_link_hash_undefweak
)
8533 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8537 if (bfd_link_pic (info
) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
8539 asection
*s
= htab
->root
.splt
;
8541 /* If this is the first .plt entry, make room for the special
8544 s
->size
+= htab
->plt_header_size
;
8546 h
->plt
.offset
= s
->size
;
8548 /* If this symbol is not defined in a regular file, and we are
8549 not generating a shared library, then set the symbol to this
8550 location in the .plt. This is required to make function
8551 pointers compare as equal between the normal executable and
8552 the shared library. */
8553 if (!bfd_link_pic (info
) && !h
->def_regular
)
8555 h
->root
.u
.def
.section
= s
;
8556 h
->root
.u
.def
.value
= h
->plt
.offset
;
8559 /* Make room for this entry. For now we only create the
8560 small model PLT entries. We later need to find a way
8561 of relaxing into these from the large model PLT entries. */
8562 s
->size
+= htab
->plt_entry_size
;
8564 /* We also need to make an entry in the .got.plt section, which
8565 will be placed in the .got section by the linker script. */
8566 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
8568 /* We also need to make an entry in the .rela.plt section. */
8569 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8571 /* We need to ensure that all GOT entries that serve the PLT
8572 are consecutive with the special GOT slots [0] [1] and
8573 [2]. Any addtional relocations, such as
8574 R_AARCH64_TLSDESC, must be placed after the PLT related
8575 entries. We abuse the reloc_count such that during
8576 sizing we adjust reloc_count to indicate the number of
8577 PLT related reserved entries. In subsequent phases when
8578 filling in the contents of the reloc entries, PLT related
8579 entries are placed by computing their PLT index (0
8580 .. reloc_count). While other none PLT relocs are placed
8581 at the slot indicated by reloc_count and reloc_count is
8584 htab
->root
.srelplt
->reloc_count
++;
8586 /* Mark the DSO in case R_<CLS>_JUMP_SLOT relocs against
8587 variant PCS symbols are present. */
8588 if (h
->other
& STO_AARCH64_VARIANT_PCS
)
8589 htab
->variant_pcs
= 1;
8594 h
->plt
.offset
= (bfd_vma
) - 1;
8600 h
->plt
.offset
= (bfd_vma
) - 1;
8604 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8605 eh
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8607 if (h
->got
.refcount
> 0)
8610 unsigned got_type
= elf_aarch64_hash_entry (h
)->got_type
;
8612 h
->got
.offset
= (bfd_vma
) - 1;
8614 dyn
= htab
->root
.dynamic_sections_created
;
8616 /* Make sure this symbol is output as a dynamic symbol.
8617 Undefined weak syms won't yet be marked as dynamic. */
8618 if (dyn
&& h
->dynindx
== -1 && !h
->forced_local
8619 && h
->root
.type
== bfd_link_hash_undefweak
)
8621 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8625 if (got_type
== GOT_UNKNOWN
)
8628 else if (got_type
== GOT_NORMAL
)
8630 h
->got
.offset
= htab
->root
.sgot
->size
;
8631 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8632 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8633 || h
->root
.type
!= bfd_link_hash_undefweak
)
8634 && (bfd_link_pic (info
)
8635 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
))
8636 /* Undefined weak symbol in static PIE resolves to 0 without
8637 any dynamic relocations. */
8638 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
8640 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8646 if (got_type
& GOT_TLSDESC_GD
)
8648 eh
->tlsdesc_got_jump_table_offset
=
8649 (htab
->root
.sgotplt
->size
8650 - aarch64_compute_jump_table_size (htab
));
8651 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8652 h
->got
.offset
= (bfd_vma
) - 2;
8655 if (got_type
& GOT_TLS_GD
)
8657 h
->got
.offset
= htab
->root
.sgot
->size
;
8658 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8661 if (got_type
& GOT_TLS_IE
)
8663 h
->got
.offset
= htab
->root
.sgot
->size
;
8664 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8667 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
8668 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8669 || h
->root
.type
!= bfd_link_hash_undefweak
)
8670 && (!bfd_link_executable (info
)
8672 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
8674 if (got_type
& GOT_TLSDESC_GD
)
8676 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8677 /* Note reloc_count not incremented here! We have
8678 already adjusted reloc_count for this relocation
8681 /* TLSDESC PLT is now needed, but not yet determined. */
8682 htab
->root
.tlsdesc_plt
= (bfd_vma
) - 1;
8685 if (got_type
& GOT_TLS_GD
)
8686 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8688 if (got_type
& GOT_TLS_IE
)
8689 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8695 h
->got
.offset
= (bfd_vma
) - 1;
8698 if (h
->dyn_relocs
== NULL
)
8701 /* In the shared -Bsymbolic case, discard space allocated for
8702 dynamic pc-relative relocs against symbols which turn out to be
8703 defined in regular objects. For the normal shared case, discard
8704 space for pc-relative relocs that have become local due to symbol
8705 visibility changes. */
8707 if (bfd_link_pic (info
))
8709 /* Relocs that use pc_count are those that appear on a call
8710 insn, or certain REL relocs that can generated via assembly.
8711 We want calls to protected symbols to resolve directly to the
8712 function rather than going via the plt. If people want
8713 function pointer comparisons to work as expected then they
8714 should avoid writing weird assembly. */
8715 if (SYMBOL_CALLS_LOCAL (info
, h
))
8717 struct elf_dyn_relocs
**pp
;
8719 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
;)
8721 p
->count
-= p
->pc_count
;
8730 /* Also discard relocs on undefined weak syms with non-default
8732 if (h
->dyn_relocs
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
8734 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
8735 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
8736 h
->dyn_relocs
= NULL
;
8738 /* Make sure undefined weak symbols are output as a dynamic
8740 else if (h
->dynindx
== -1
8742 && h
->root
.type
== bfd_link_hash_undefweak
8743 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8748 else if (ELIMINATE_COPY_RELOCS
)
8750 /* For the non-shared case, discard space for relocs against
8751 symbols which turn out to need copy relocs or are not
8757 || (htab
->root
.dynamic_sections_created
8758 && (h
->root
.type
== bfd_link_hash_undefweak
8759 || h
->root
.type
== bfd_link_hash_undefined
))))
8761 /* Make sure this symbol is output as a dynamic symbol.
8762 Undefined weak syms won't yet be marked as dynamic. */
8763 if (h
->dynindx
== -1
8765 && h
->root
.type
== bfd_link_hash_undefweak
8766 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8769 /* If that succeeded, we know we'll be keeping all the
8771 if (h
->dynindx
!= -1)
8775 h
->dyn_relocs
= NULL
;
8780 /* Finally, allocate space. */
8781 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
8785 sreloc
= elf_section_data (p
->sec
)->sreloc
;
8787 BFD_ASSERT (sreloc
!= NULL
);
8789 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
8795 /* Allocate space in .plt, .got and associated reloc sections for
8796 ifunc dynamic relocs. */
8799 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
8802 struct bfd_link_info
*info
;
8803 struct elf_aarch64_link_hash_table
*htab
;
8805 /* An example of a bfd_link_hash_indirect symbol is versioned
8806 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8807 -> __gxx_personality_v0(bfd_link_hash_defined)
8809 There is no need to process bfd_link_hash_indirect symbols here
8810 because we will also be presented with the concrete instance of
8811 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8812 called to copy all relevant data from the generic to the concrete
8814 if (h
->root
.type
== bfd_link_hash_indirect
)
8817 if (h
->root
.type
== bfd_link_hash_warning
)
8818 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8820 info
= (struct bfd_link_info
*) inf
;
8821 htab
= elf_aarch64_hash_table (info
);
8823 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8824 here if it is defined and referenced in a non-shared object. */
8825 if (h
->type
== STT_GNU_IFUNC
8827 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
8829 htab
->plt_entry_size
,
8830 htab
->plt_header_size
,
8836 /* Allocate space in .plt, .got and associated reloc sections for
8837 local ifunc dynamic relocs. */
8840 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
8842 struct elf_link_hash_entry
*h
8843 = (struct elf_link_hash_entry
*) *slot
;
8845 if (h
->type
!= STT_GNU_IFUNC
8849 || h
->root
.type
!= bfd_link_hash_defined
)
8852 return elfNN_aarch64_allocate_ifunc_dynrelocs (h
, inf
);
8855 /* This is the most important function of all . Innocuosly named
8859 elfNN_aarch64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
8860 struct bfd_link_info
*info
)
8862 struct elf_aarch64_link_hash_table
*htab
;
8868 htab
= elf_aarch64_hash_table ((info
));
8869 dynobj
= htab
->root
.dynobj
;
8871 BFD_ASSERT (dynobj
!= NULL
);
8873 if (htab
->root
.dynamic_sections_created
)
8875 if (bfd_link_executable (info
) && !info
->nointerp
)
8877 s
= bfd_get_linker_section (dynobj
, ".interp");
8880 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
8881 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
8885 /* Set up .got offsets for local syms, and space for local dynamic
8887 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8889 struct elf_aarch64_local_symbol
*locals
= NULL
;
8890 Elf_Internal_Shdr
*symtab_hdr
;
8894 if (!is_aarch64_elf (ibfd
))
8897 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
8899 struct elf_dyn_relocs
*p
;
8901 for (p
= (struct elf_dyn_relocs
*)
8902 (elf_section_data (s
)->local_dynrel
); p
!= NULL
; p
= p
->next
)
8904 if (!bfd_is_abs_section (p
->sec
)
8905 && bfd_is_abs_section (p
->sec
->output_section
))
8907 /* Input section has been discarded, either because
8908 it is a copy of a linkonce section or due to
8909 linker script /DISCARD/, so we'll be discarding
8912 else if (p
->count
!= 0)
8914 srel
= elf_section_data (p
->sec
)->sreloc
;
8915 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
8916 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
8917 info
->flags
|= DF_TEXTREL
;
8922 locals
= elf_aarch64_locals (ibfd
);
8926 symtab_hdr
= &elf_symtab_hdr (ibfd
);
8927 srel
= htab
->root
.srelgot
;
8928 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
8930 locals
[i
].got_offset
= (bfd_vma
) - 1;
8931 locals
[i
].tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8932 if (locals
[i
].got_refcount
> 0)
8934 unsigned got_type
= locals
[i
].got_type
;
8935 if (got_type
& GOT_TLSDESC_GD
)
8937 locals
[i
].tlsdesc_got_jump_table_offset
=
8938 (htab
->root
.sgotplt
->size
8939 - aarch64_compute_jump_table_size (htab
));
8940 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8941 locals
[i
].got_offset
= (bfd_vma
) - 2;
8944 if (got_type
& GOT_TLS_GD
)
8946 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8947 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8950 if (got_type
& GOT_TLS_IE
8951 || got_type
& GOT_NORMAL
)
8953 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8954 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8957 if (got_type
== GOT_UNKNOWN
)
8961 if (bfd_link_pic (info
))
8963 if (got_type
& GOT_TLSDESC_GD
)
8965 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8966 /* Note RELOC_COUNT not incremented here! */
8967 htab
->root
.tlsdesc_plt
= (bfd_vma
) - 1;
8970 if (got_type
& GOT_TLS_GD
)
8971 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8973 if (got_type
& GOT_TLS_IE
8974 || got_type
& GOT_NORMAL
)
8975 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8980 locals
[i
].got_refcount
= (bfd_vma
) - 1;
8986 /* Allocate global sym .plt and .got entries, and space for global
8987 sym dynamic relocs. */
8988 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_dynrelocs
,
8991 /* Allocate global ifunc sym .plt and .got entries, and space for global
8992 ifunc sym dynamic relocs. */
8993 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_ifunc_dynrelocs
,
8996 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8997 htab_traverse (htab
->loc_hash_table
,
8998 elfNN_aarch64_allocate_local_ifunc_dynrelocs
,
9001 /* For every jump slot reserved in the sgotplt, reloc_count is
9002 incremented. However, when we reserve space for TLS descriptors,
9003 it's not incremented, so in order to compute the space reserved
9004 for them, it suffices to multiply the reloc count by the jump
9007 if (htab
->root
.srelplt
)
9008 htab
->sgotplt_jump_table_size
= aarch64_compute_jump_table_size (htab
);
9010 if (htab
->root
.tlsdesc_plt
)
9012 if (htab
->root
.splt
->size
== 0)
9013 htab
->root
.splt
->size
+= htab
->plt_header_size
;
9015 /* If we're not using lazy TLS relocations, don't generate the
9016 GOT and PLT entry required. */
9017 if ((info
->flags
& DF_BIND_NOW
))
9018 htab
->root
.tlsdesc_plt
= 0;
9021 htab
->root
.tlsdesc_plt
= htab
->root
.splt
->size
;
9022 htab
->root
.splt
->size
+= htab
->tlsdesc_plt_entry_size
;
9024 htab
->root
.tlsdesc_got
= htab
->root
.sgot
->size
;
9025 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
9029 /* Init mapping symbols information to use later to distingush between
9030 code and data while scanning for errata. */
9031 if (htab
->fix_erratum_835769
|| htab
->fix_erratum_843419
)
9032 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
9034 if (!is_aarch64_elf (ibfd
))
9036 bfd_elfNN_aarch64_init_maps (ibfd
);
9039 /* We now have determined the sizes of the various dynamic sections.
9040 Allocate memory for them. */
9042 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
9044 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
9047 if (s
== htab
->root
.splt
9048 || s
== htab
->root
.sgot
9049 || s
== htab
->root
.sgotplt
9050 || s
== htab
->root
.iplt
9051 || s
== htab
->root
.igotplt
9052 || s
== htab
->root
.sdynbss
9053 || s
== htab
->root
.sdynrelro
)
9055 /* Strip this section if we don't need it; see the
9058 else if (startswith (bfd_section_name (s
), ".rela"))
9060 if (s
->size
!= 0 && s
!= htab
->root
.srelplt
)
9063 /* We use the reloc_count field as a counter if we need
9064 to copy relocs into the output file. */
9065 if (s
!= htab
->root
.srelplt
)
9070 /* It's not one of our sections, so don't allocate space. */
9076 /* If we don't need this section, strip it from the
9077 output file. This is mostly to handle .rela.bss and
9078 .rela.plt. We must create both sections in
9079 create_dynamic_sections, because they must be created
9080 before the linker maps input sections to output
9081 sections. The linker does that before
9082 adjust_dynamic_symbol is called, and it is that
9083 function which decides whether anything needs to go
9084 into these sections. */
9085 s
->flags
|= SEC_EXCLUDE
;
9089 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
9092 /* Allocate memory for the section contents. We use bfd_zalloc
9093 here in case unused entries are not reclaimed before the
9094 section's contents are written out. This should not happen,
9095 but this way if it does, we get a R_AARCH64_NONE reloc instead
9097 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
9098 if (s
->contents
== NULL
)
9102 if (htab
->root
.dynamic_sections_created
)
9104 /* Add some entries to the .dynamic section. We fill in the
9105 values later, in elfNN_aarch64_finish_dynamic_sections, but we
9106 must add the entries now so that we get the correct size for
9107 the .dynamic section. The DT_DEBUG entry is filled in by the
9108 dynamic linker and used by the debugger. */
9109 #define add_dynamic_entry(TAG, VAL) \
9110 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9112 if (!_bfd_elf_add_dynamic_tags (output_bfd
, info
, relocs
))
9115 if (htab
->root
.splt
->size
!= 0)
9117 if (htab
->variant_pcs
9118 && !add_dynamic_entry (DT_AARCH64_VARIANT_PCS
, 0))
9121 if ((elf_aarch64_tdata (output_bfd
)->plt_type
== PLT_BTI_PAC
)
9122 && (!add_dynamic_entry (DT_AARCH64_BTI_PLT
, 0)
9123 || !add_dynamic_entry (DT_AARCH64_PAC_PLT
, 0)))
9126 else if ((elf_aarch64_tdata (output_bfd
)->plt_type
== PLT_BTI
)
9127 && !add_dynamic_entry (DT_AARCH64_BTI_PLT
, 0))
9130 else if ((elf_aarch64_tdata (output_bfd
)->plt_type
== PLT_PAC
)
9131 && !add_dynamic_entry (DT_AARCH64_PAC_PLT
, 0))
9135 #undef add_dynamic_entry
9141 elf_aarch64_update_plt_entry (bfd
*output_bfd
,
9142 bfd_reloc_code_real_type r_type
,
9143 bfd_byte
*plt_entry
, bfd_vma value
)
9145 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (r_type
);
9147 /* FIXME: We should check the return value from this function call. */
9148 (void) _bfd_aarch64_elf_put_addend (output_bfd
, plt_entry
, r_type
, howto
, value
);
9152 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry
*h
,
9153 struct elf_aarch64_link_hash_table
9154 *htab
, bfd
*output_bfd
,
9155 struct bfd_link_info
*info
)
9157 bfd_byte
*plt_entry
;
9160 bfd_vma gotplt_entry_address
;
9161 bfd_vma plt_entry_address
;
9162 Elf_Internal_Rela rela
;
9164 asection
*plt
, *gotplt
, *relplt
;
9166 /* When building a static executable, use .iplt, .igot.plt and
9167 .rela.iplt sections for STT_GNU_IFUNC symbols. */
9168 if (htab
->root
.splt
!= NULL
)
9170 plt
= htab
->root
.splt
;
9171 gotplt
= htab
->root
.sgotplt
;
9172 relplt
= htab
->root
.srelplt
;
9176 plt
= htab
->root
.iplt
;
9177 gotplt
= htab
->root
.igotplt
;
9178 relplt
= htab
->root
.irelplt
;
9181 /* Get the index in the procedure linkage table which
9182 corresponds to this symbol. This is the index of this symbol
9183 in all the symbols for which we are making plt entries. The
9184 first entry in the procedure linkage table is reserved.
9186 Get the offset into the .got table of the entry that
9187 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
9188 bytes. The first three are reserved for the dynamic linker.
9190 For static executables, we don't reserve anything. */
9192 if (plt
== htab
->root
.splt
)
9194 plt_index
= (h
->plt
.offset
- htab
->plt_header_size
) / htab
->plt_entry_size
;
9195 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
9199 plt_index
= h
->plt
.offset
/ htab
->plt_entry_size
;
9200 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
9203 plt_entry
= plt
->contents
+ h
->plt
.offset
;
9204 plt_entry_address
= plt
->output_section
->vma
9205 + plt
->output_offset
+ h
->plt
.offset
;
9206 gotplt_entry_address
= gotplt
->output_section
->vma
+
9207 gotplt
->output_offset
+ got_offset
;
9209 /* Copy in the boiler-plate for the PLTn entry. */
9210 memcpy (plt_entry
, htab
->plt_entry
, htab
->plt_entry_size
);
9212 /* First instruction in BTI enabled PLT stub is a BTI
9213 instruction so skip it. */
9214 if (elf_aarch64_tdata (output_bfd
)->plt_type
& PLT_BTI
9215 && elf_elfheader (output_bfd
)->e_type
== ET_EXEC
)
9216 plt_entry
= plt_entry
+ 4;
9218 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9219 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9220 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9222 PG (gotplt_entry_address
) -
9223 PG (plt_entry_address
));
9225 /* Fill in the lo12 bits for the load from the pltgot. */
9226 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
9228 PG_OFFSET (gotplt_entry_address
));
9230 /* Fill in the lo12 bits for the add from the pltgot entry. */
9231 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
9233 PG_OFFSET (gotplt_entry_address
));
9235 /* All the GOTPLT Entries are essentially initialized to PLT0. */
9236 bfd_put_NN (output_bfd
,
9237 plt
->output_section
->vma
+ plt
->output_offset
,
9238 gotplt
->contents
+ got_offset
);
9240 rela
.r_offset
= gotplt_entry_address
;
9242 if (h
->dynindx
== -1
9243 || ((bfd_link_executable (info
)
9244 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
9246 && h
->type
== STT_GNU_IFUNC
))
9248 /* If an STT_GNU_IFUNC symbol is locally defined, generate
9249 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
9250 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
9251 rela
.r_addend
= (h
->root
.u
.def
.value
9252 + h
->root
.u
.def
.section
->output_section
->vma
9253 + h
->root
.u
.def
.section
->output_offset
);
9257 /* Fill in the entry in the .rela.plt section. */
9258 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (JUMP_SLOT
));
9262 /* Compute the relocation entry to used based on PLT index and do
9263 not adjust reloc_count. The reloc_count has already been adjusted
9264 to account for this entry. */
9265 loc
= relplt
->contents
+ plt_index
* RELOC_SIZE (htab
);
9266 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9269 /* Size sections even though they're not dynamic. We use it to setup
9270 _TLS_MODULE_BASE_, if needed. */
9273 elfNN_aarch64_always_size_sections (bfd
*output_bfd
,
9274 struct bfd_link_info
*info
)
9278 if (bfd_link_relocatable (info
))
9281 tls_sec
= elf_hash_table (info
)->tls_sec
;
9285 struct elf_link_hash_entry
*tlsbase
;
9287 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
9288 "_TLS_MODULE_BASE_", true, true, false);
9292 struct bfd_link_hash_entry
*h
= NULL
;
9293 const struct elf_backend_data
*bed
=
9294 get_elf_backend_data (output_bfd
);
9296 if (!(_bfd_generic_link_add_one_symbol
9297 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
9298 tls_sec
, 0, NULL
, false, bed
->collect
, &h
)))
9301 tlsbase
->type
= STT_TLS
;
9302 tlsbase
= (struct elf_link_hash_entry
*) h
;
9303 tlsbase
->def_regular
= 1;
9304 tlsbase
->other
= STV_HIDDEN
;
9305 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, true);
9312 /* Finish up dynamic symbol handling. We set the contents of various
9313 dynamic sections here. */
9316 elfNN_aarch64_finish_dynamic_symbol (bfd
*output_bfd
,
9317 struct bfd_link_info
*info
,
9318 struct elf_link_hash_entry
*h
,
9319 Elf_Internal_Sym
*sym
)
9321 struct elf_aarch64_link_hash_table
*htab
;
9322 htab
= elf_aarch64_hash_table (info
);
9324 if (h
->plt
.offset
!= (bfd_vma
) - 1)
9326 asection
*plt
, *gotplt
, *relplt
;
9328 /* This symbol has an entry in the procedure linkage table. Set
9331 /* When building a static executable, use .iplt, .igot.plt and
9332 .rela.iplt sections for STT_GNU_IFUNC symbols. */
9333 if (htab
->root
.splt
!= NULL
)
9335 plt
= htab
->root
.splt
;
9336 gotplt
= htab
->root
.sgotplt
;
9337 relplt
= htab
->root
.srelplt
;
9341 plt
= htab
->root
.iplt
;
9342 gotplt
= htab
->root
.igotplt
;
9343 relplt
= htab
->root
.irelplt
;
9346 /* This symbol has an entry in the procedure linkage table. Set
9348 if ((h
->dynindx
== -1
9349 && !((h
->forced_local
|| bfd_link_executable (info
))
9351 && h
->type
== STT_GNU_IFUNC
))
9357 elfNN_aarch64_create_small_pltn_entry (h
, htab
, output_bfd
, info
);
9358 if (!h
->def_regular
)
9360 /* Mark the symbol as undefined, rather than as defined in
9361 the .plt section. */
9362 sym
->st_shndx
= SHN_UNDEF
;
9363 /* If the symbol is weak we need to clear the value.
9364 Otherwise, the PLT entry would provide a definition for
9365 the symbol even if the symbol wasn't defined anywhere,
9366 and so the symbol would never be NULL. Leave the value if
9367 there were any relocations where pointer equality matters
9368 (this is a clue for the dynamic linker, to make function
9369 pointer comparisons work between an application and shared
9371 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
9376 if (h
->got
.offset
!= (bfd_vma
) - 1
9377 && elf_aarch64_hash_entry (h
)->got_type
== GOT_NORMAL
9378 /* Undefined weak symbol in static PIE resolves to 0 without
9379 any dynamic relocations. */
9380 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
9382 Elf_Internal_Rela rela
;
9385 /* This symbol has an entry in the global offset table. Set it
9387 if (htab
->root
.sgot
== NULL
|| htab
->root
.srelgot
== NULL
)
9390 rela
.r_offset
= (htab
->root
.sgot
->output_section
->vma
9391 + htab
->root
.sgot
->output_offset
9392 + (h
->got
.offset
& ~(bfd_vma
) 1));
9395 && h
->type
== STT_GNU_IFUNC
)
9397 if (bfd_link_pic (info
))
9399 /* Generate R_AARCH64_GLOB_DAT. */
9406 if (!h
->pointer_equality_needed
)
9409 /* For non-shared object, we can't use .got.plt, which
9410 contains the real function address if we need pointer
9411 equality. We load the GOT entry with the PLT entry. */
9412 plt
= htab
->root
.splt
? htab
->root
.splt
: htab
->root
.iplt
;
9413 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
9414 + plt
->output_offset
9416 htab
->root
.sgot
->contents
9417 + (h
->got
.offset
& ~(bfd_vma
) 1));
9421 else if (bfd_link_pic (info
) && SYMBOL_REFERENCES_LOCAL (info
, h
))
9423 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
9426 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
9427 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
9428 rela
.r_addend
= (h
->root
.u
.def
.value
9429 + h
->root
.u
.def
.section
->output_section
->vma
9430 + h
->root
.u
.def
.section
->output_offset
);
9435 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
9436 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9437 htab
->root
.sgot
->contents
+ h
->got
.offset
);
9438 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (GLOB_DAT
));
9442 loc
= htab
->root
.srelgot
->contents
;
9443 loc
+= htab
->root
.srelgot
->reloc_count
++ * RELOC_SIZE (htab
);
9444 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9449 Elf_Internal_Rela rela
;
9453 /* This symbol needs a copy reloc. Set it up. */
9454 if (h
->dynindx
== -1
9455 || (h
->root
.type
!= bfd_link_hash_defined
9456 && h
->root
.type
!= bfd_link_hash_defweak
)
9457 || htab
->root
.srelbss
== NULL
)
9460 rela
.r_offset
= (h
->root
.u
.def
.value
9461 + h
->root
.u
.def
.section
->output_section
->vma
9462 + h
->root
.u
.def
.section
->output_offset
);
9463 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (COPY
));
9465 if (h
->root
.u
.def
.section
== htab
->root
.sdynrelro
)
9466 s
= htab
->root
.sreldynrelro
;
9468 s
= htab
->root
.srelbss
;
9469 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
9470 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9473 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
9474 be NULL for local symbols. */
9476 && (h
== elf_hash_table (info
)->hdynamic
9477 || h
== elf_hash_table (info
)->hgot
))
9478 sym
->st_shndx
= SHN_ABS
;
9483 /* Finish up local dynamic symbol handling. We set the contents of
9484 various dynamic sections here. */
9487 elfNN_aarch64_finish_local_dynamic_symbol (void **slot
, void *inf
)
9489 struct elf_link_hash_entry
*h
9490 = (struct elf_link_hash_entry
*) *slot
;
9491 struct bfd_link_info
*info
9492 = (struct bfd_link_info
*) inf
;
9494 return elfNN_aarch64_finish_dynamic_symbol (info
->output_bfd
,
9499 elfNN_aarch64_init_small_plt0_entry (bfd
*output_bfd ATTRIBUTE_UNUSED
,
9500 struct elf_aarch64_link_hash_table
9503 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
9504 small and large plts and at the minute just generates
9507 /* PLT0 of the small PLT looks like this in ELF64 -
9508 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
9509 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
9510 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
9512 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
9513 // GOTPLT entry for this.
9515 PLT0 will be slightly different in ELF32 due to different got entry
9517 bfd_vma plt_got_2nd_ent
; /* Address of GOT[2]. */
9521 memcpy (htab
->root
.splt
->contents
, htab
->plt0_entry
,
9522 htab
->plt_header_size
);
9524 /* PR 26312: Explicitly set the sh_entsize to 0 so that
9525 consumers do not think that the section contains fixed
9527 elf_section_data (htab
->root
.splt
->output_section
)->this_hdr
.sh_entsize
= 0;
9529 plt_got_2nd_ent
= (htab
->root
.sgotplt
->output_section
->vma
9530 + htab
->root
.sgotplt
->output_offset
9531 + GOT_ENTRY_SIZE
* 2);
9533 plt_base
= htab
->root
.splt
->output_section
->vma
+
9534 htab
->root
.splt
->output_offset
;
9536 /* First instruction in BTI enabled PLT stub is a BTI
9537 instruction so skip it. */
9538 bfd_byte
*plt0_entry
= htab
->root
.splt
->contents
;
9539 if (elf_aarch64_tdata (output_bfd
)->plt_type
& PLT_BTI
)
9540 plt0_entry
= plt0_entry
+ 4;
9542 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9543 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9544 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9546 PG (plt_got_2nd_ent
) - PG (plt_base
+ 4));
9548 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
9550 PG_OFFSET (plt_got_2nd_ent
));
9552 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
9554 PG_OFFSET (plt_got_2nd_ent
));
9558 elfNN_aarch64_finish_dynamic_sections (bfd
*output_bfd
,
9559 struct bfd_link_info
*info
)
9561 struct elf_aarch64_link_hash_table
*htab
;
9565 htab
= elf_aarch64_hash_table (info
);
9566 dynobj
= htab
->root
.dynobj
;
9567 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
9569 if (htab
->root
.dynamic_sections_created
)
9571 ElfNN_External_Dyn
*dyncon
, *dynconend
;
9573 if (sdyn
== NULL
|| htab
->root
.sgot
== NULL
)
9576 dyncon
= (ElfNN_External_Dyn
*) sdyn
->contents
;
9577 dynconend
= (ElfNN_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
9578 for (; dyncon
< dynconend
; dyncon
++)
9580 Elf_Internal_Dyn dyn
;
9583 bfd_elfNN_swap_dyn_in (dynobj
, dyncon
, &dyn
);
9591 s
= htab
->root
.sgotplt
;
9592 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9596 s
= htab
->root
.srelplt
;
9597 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9601 s
= htab
->root
.srelplt
;
9602 dyn
.d_un
.d_val
= s
->size
;
9605 case DT_TLSDESC_PLT
:
9606 s
= htab
->root
.splt
;
9607 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9608 + htab
->root
.tlsdesc_plt
;
9611 case DT_TLSDESC_GOT
:
9612 s
= htab
->root
.sgot
;
9613 BFD_ASSERT (htab
->root
.tlsdesc_got
!= (bfd_vma
)-1);
9614 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9615 + htab
->root
.tlsdesc_got
;
9619 bfd_elfNN_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
9624 /* Fill in the special first entry in the procedure linkage table. */
9625 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
9627 elfNN_aarch64_init_small_plt0_entry (output_bfd
, htab
);
9629 if (htab
->root
.tlsdesc_plt
&& !(info
->flags
& DF_BIND_NOW
))
9631 BFD_ASSERT (htab
->root
.tlsdesc_got
!= (bfd_vma
)-1);
9632 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9633 htab
->root
.sgot
->contents
+ htab
->root
.tlsdesc_got
);
9635 const bfd_byte
*entry
= elfNN_aarch64_tlsdesc_small_plt_entry
;
9636 htab
->tlsdesc_plt_entry_size
= PLT_TLSDESC_ENTRY_SIZE
;
9638 aarch64_plt_type type
= elf_aarch64_tdata (output_bfd
)->plt_type
;
9639 if (type
== PLT_BTI
|| type
== PLT_BTI_PAC
)
9641 entry
= elfNN_aarch64_tlsdesc_small_plt_bti_entry
;
9644 memcpy (htab
->root
.splt
->contents
+ htab
->root
.tlsdesc_plt
,
9645 entry
, htab
->tlsdesc_plt_entry_size
);
9648 bfd_vma adrp1_addr
=
9649 htab
->root
.splt
->output_section
->vma
9650 + htab
->root
.splt
->output_offset
9651 + htab
->root
.tlsdesc_plt
+ 4;
9653 bfd_vma adrp2_addr
= adrp1_addr
+ 4;
9656 htab
->root
.sgot
->output_section
->vma
9657 + htab
->root
.sgot
->output_offset
;
9659 bfd_vma pltgot_addr
=
9660 htab
->root
.sgotplt
->output_section
->vma
9661 + htab
->root
.sgotplt
->output_offset
;
9663 bfd_vma dt_tlsdesc_got
= got_addr
+ htab
->root
.tlsdesc_got
;
9665 bfd_byte
*plt_entry
=
9666 htab
->root
.splt
->contents
+ htab
->root
.tlsdesc_plt
;
9668 /* First instruction in BTI enabled PLT stub is a BTI
9669 instruction so skip it. */
9672 plt_entry
= plt_entry
+ 4;
9673 adrp1_addr
= adrp1_addr
+ 4;
9674 adrp2_addr
= adrp2_addr
+ 4;
9677 /* adrp x2, DT_TLSDESC_GOT */
9678 elf_aarch64_update_plt_entry (output_bfd
,
9679 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9681 (PG (dt_tlsdesc_got
)
9682 - PG (adrp1_addr
)));
9685 elf_aarch64_update_plt_entry (output_bfd
,
9686 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9689 - PG (adrp2_addr
)));
9691 /* ldr x2, [x2, #0] */
9692 elf_aarch64_update_plt_entry (output_bfd
,
9693 BFD_RELOC_AARCH64_LDSTNN_LO12
,
9695 PG_OFFSET (dt_tlsdesc_got
));
9698 elf_aarch64_update_plt_entry (output_bfd
,
9699 BFD_RELOC_AARCH64_ADD_LO12
,
9701 PG_OFFSET (pltgot_addr
));
9706 if (htab
->root
.sgotplt
)
9708 if (bfd_is_abs_section (htab
->root
.sgotplt
->output_section
))
9711 (_("discarded output section: `%pA'"), htab
->root
.sgotplt
);
9715 /* Fill in the first three entries in the global offset table. */
9716 if (htab
->root
.sgotplt
->size
> 0)
9718 bfd_put_NN (output_bfd
, (bfd_vma
) 0, htab
->root
.sgotplt
->contents
);
9720 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
9721 bfd_put_NN (output_bfd
,
9723 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
9724 bfd_put_NN (output_bfd
,
9726 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
* 2);
9729 if (htab
->root
.sgot
)
9731 if (htab
->root
.sgot
->size
> 0)
9734 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0;
9735 bfd_put_NN (output_bfd
, addr
, htab
->root
.sgot
->contents
);
9739 elf_section_data (htab
->root
.sgotplt
->output_section
)->
9740 this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
9743 if (htab
->root
.sgot
&& htab
->root
.sgot
->size
> 0)
9744 elf_section_data (htab
->root
.sgot
->output_section
)->this_hdr
.sh_entsize
9747 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
9748 htab_traverse (htab
->loc_hash_table
,
9749 elfNN_aarch64_finish_local_dynamic_symbol
,
9755 /* Check if BTI enabled PLTs are needed. Returns the type needed. */
9756 static aarch64_plt_type
9757 get_plt_type (bfd
*abfd
)
9759 aarch64_plt_type ret
= PLT_NORMAL
;
9760 bfd_byte
*contents
, *extdyn
, *extdynend
;
9761 asection
*sec
= bfd_get_section_by_name (abfd
, ".dynamic");
9762 if (!sec
|| !bfd_malloc_and_get_section (abfd
, sec
, &contents
))
9765 extdynend
= contents
+ sec
->size
;
9766 for (; extdyn
< extdynend
; extdyn
+= sizeof (ElfNN_External_Dyn
))
9768 Elf_Internal_Dyn dyn
;
9769 bfd_elfNN_swap_dyn_in (abfd
, extdyn
, &dyn
);
9771 /* Let's check the processor specific dynamic array tags. */
9772 bfd_vma tag
= dyn
.d_tag
;
9773 if (tag
< DT_LOPROC
|| tag
> DT_HIPROC
)
9778 case DT_AARCH64_BTI_PLT
:
9782 case DT_AARCH64_PAC_PLT
:
9794 elfNN_aarch64_get_synthetic_symtab (bfd
*abfd
,
9801 elf_aarch64_tdata (abfd
)->plt_type
= get_plt_type (abfd
);
9802 return _bfd_elf_get_synthetic_symtab (abfd
, symcount
, syms
,
9803 dynsymcount
, dynsyms
, ret
);
9806 /* Return address for Ith PLT stub in section PLT, for relocation REL
9807 or (bfd_vma) -1 if it should not be included. */
9810 elfNN_aarch64_plt_sym_val (bfd_vma i
, const asection
*plt
,
9811 const arelent
*rel ATTRIBUTE_UNUSED
)
9813 size_t plt0_size
= PLT_ENTRY_SIZE
;
9814 size_t pltn_size
= PLT_SMALL_ENTRY_SIZE
;
9816 if (elf_aarch64_tdata (plt
->owner
)->plt_type
== PLT_BTI_PAC
)
9818 if (elf_elfheader (plt
->owner
)->e_type
== ET_EXEC
)
9819 pltn_size
= PLT_BTI_PAC_SMALL_ENTRY_SIZE
;
9821 pltn_size
= PLT_PAC_SMALL_ENTRY_SIZE
;
9823 else if (elf_aarch64_tdata (plt
->owner
)->plt_type
== PLT_BTI
)
9825 if (elf_elfheader (plt
->owner
)->e_type
== ET_EXEC
)
9826 pltn_size
= PLT_BTI_SMALL_ENTRY_SIZE
;
9828 else if (elf_aarch64_tdata (plt
->owner
)->plt_type
== PLT_PAC
)
9830 pltn_size
= PLT_PAC_SMALL_ENTRY_SIZE
;
9833 return plt
->vma
+ plt0_size
+ i
* pltn_size
;
9836 /* Returns TRUE if NAME is an AArch64 mapping symbol.
9837 The ARM ELF standard defines $x (for A64 code) and $d (for data).
9838 It also allows a period initiated suffix to be added to the symbol, ie:
9839 "$[adtx]\.[:sym_char]+". */
9842 is_aarch64_mapping_symbol (const char * name
)
9844 return name
!= NULL
/* Paranoia. */
9845 && name
[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
9846 the mapping symbols could have acquired a prefix.
9847 We do not support this here, since such symbols no
9848 longer conform to the ARM ELF ABI. */
9849 && (name
[1] == 'd' || name
[1] == 'x')
9850 && (name
[2] == 0 || name
[2] == '.');
9851 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
9852 any characters that follow the period are legal characters for the body
9853 of a symbol's name. For now we just assume that this is the case. */
9856 /* Make sure that mapping symbols in object files are not removed via the
9857 "strip --strip-unneeded" tool. These symbols might needed in order to
9858 correctly generate linked files. Once an object file has been linked,
9859 it should be safe to remove them. */
9862 elfNN_aarch64_backend_symbol_processing (bfd
*abfd
, asymbol
*sym
)
9864 if (((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0)
9865 && sym
->section
!= bfd_abs_section_ptr
9866 && is_aarch64_mapping_symbol (sym
->name
))
9867 sym
->flags
|= BSF_KEEP
;
9870 /* Implement elf_backend_setup_gnu_properties for AArch64. It serves as a
9871 wrapper function for _bfd_aarch64_elf_link_setup_gnu_properties to account
9872 for the effect of GNU properties of the output_bfd. */
9874 elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info
*info
)
9876 uint32_t prop
= elf_aarch64_tdata (info
->output_bfd
)->gnu_and_prop
;
9877 bfd
*pbfd
= _bfd_aarch64_elf_link_setup_gnu_properties (info
, &prop
);
9878 elf_aarch64_tdata (info
->output_bfd
)->gnu_and_prop
= prop
;
9879 elf_aarch64_tdata (info
->output_bfd
)->plt_type
9880 |= (prop
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
) ? PLT_BTI
: 0;
9881 setup_plt_values (info
, elf_aarch64_tdata (info
->output_bfd
)->plt_type
);
9885 /* Implement elf_backend_merge_gnu_properties for AArch64. It serves as a
9886 wrapper function for _bfd_aarch64_elf_merge_gnu_properties to account
9887 for the effect of GNU properties of the output_bfd. */
9889 elfNN_aarch64_merge_gnu_properties (struct bfd_link_info
*info
,
9890 bfd
*abfd
, bfd
*bbfd
,
9891 elf_property
*aprop
,
9892 elf_property
*bprop
)
9895 = elf_aarch64_tdata (info
->output_bfd
)->gnu_and_prop
;
9897 /* If output has been marked with BTI using command line argument, give out
9898 warning if necessary. */
9899 /* Properties are merged per type, hence only check for warnings when merging
9900 GNU_PROPERTY_AARCH64_FEATURE_1_AND. */
9901 if (((aprop
&& aprop
->pr_type
== GNU_PROPERTY_AARCH64_FEATURE_1_AND
)
9902 || (bprop
&& bprop
->pr_type
== GNU_PROPERTY_AARCH64_FEATURE_1_AND
))
9903 && (prop
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
)
9904 && (!elf_aarch64_tdata (info
->output_bfd
)->no_bti_warn
))
9906 if ((aprop
&& !(aprop
->u
.number
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
))
9909 _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
9910 "all inputs do not have BTI in NOTE section."),
9913 if ((bprop
&& !(bprop
->u
.number
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
))
9916 _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
9917 "all inputs do not have BTI in NOTE section."),
9922 return _bfd_aarch64_elf_merge_gnu_properties (info
, abfd
, aprop
,
9926 /* We use this so we can override certain functions
9927 (though currently we don't). */
9929 const struct elf_size_info elfNN_aarch64_size_info
=
9931 sizeof (ElfNN_External_Ehdr
),
9932 sizeof (ElfNN_External_Phdr
),
9933 sizeof (ElfNN_External_Shdr
),
9934 sizeof (ElfNN_External_Rel
),
9935 sizeof (ElfNN_External_Rela
),
9936 sizeof (ElfNN_External_Sym
),
9937 sizeof (ElfNN_External_Dyn
),
9938 sizeof (Elf_External_Note
),
9939 4, /* Hash table entry size. */
9940 1, /* Internal relocs per external relocs. */
9941 ARCH_SIZE
, /* Arch size. */
9942 LOG_FILE_ALIGN
, /* Log_file_align. */
9943 ELFCLASSNN
, EV_CURRENT
,
9944 bfd_elfNN_write_out_phdrs
,
9945 bfd_elfNN_write_shdrs_and_ehdr
,
9946 bfd_elfNN_checksum_contents
,
9947 bfd_elfNN_write_relocs
,
9948 bfd_elfNN_swap_symbol_in
,
9949 bfd_elfNN_swap_symbol_out
,
9950 bfd_elfNN_slurp_reloc_table
,
9951 bfd_elfNN_slurp_symbol_table
,
9952 bfd_elfNN_swap_dyn_in
,
9953 bfd_elfNN_swap_dyn_out
,
9954 bfd_elfNN_swap_reloc_in
,
9955 bfd_elfNN_swap_reloc_out
,
9956 bfd_elfNN_swap_reloca_in
,
9957 bfd_elfNN_swap_reloca_out
9960 #define ELF_ARCH bfd_arch_aarch64
9961 #define ELF_MACHINE_CODE EM_AARCH64
9962 #define ELF_MAXPAGESIZE 0x10000
9963 #define ELF_MINPAGESIZE 0x1000
9964 #define ELF_COMMONPAGESIZE 0x1000
9966 #define bfd_elfNN_close_and_cleanup \
9967 elfNN_aarch64_close_and_cleanup
9969 #define bfd_elfNN_bfd_free_cached_info \
9970 elfNN_aarch64_bfd_free_cached_info
9972 #define bfd_elfNN_bfd_is_target_special_symbol \
9973 elfNN_aarch64_is_target_special_symbol
9975 #define bfd_elfNN_bfd_link_hash_table_create \
9976 elfNN_aarch64_link_hash_table_create
9978 #define bfd_elfNN_bfd_merge_private_bfd_data \
9979 elfNN_aarch64_merge_private_bfd_data
9981 #define bfd_elfNN_bfd_print_private_bfd_data \
9982 elfNN_aarch64_print_private_bfd_data
9984 #define bfd_elfNN_bfd_reloc_type_lookup \
9985 elfNN_aarch64_reloc_type_lookup
9987 #define bfd_elfNN_bfd_reloc_name_lookup \
9988 elfNN_aarch64_reloc_name_lookup
9990 #define bfd_elfNN_bfd_set_private_flags \
9991 elfNN_aarch64_set_private_flags
9993 #define bfd_elfNN_find_inliner_info \
9994 elfNN_aarch64_find_inliner_info
9996 #define bfd_elfNN_get_synthetic_symtab \
9997 elfNN_aarch64_get_synthetic_symtab
9999 #define bfd_elfNN_mkobject \
10000 elfNN_aarch64_mkobject
10002 #define bfd_elfNN_new_section_hook \
10003 elfNN_aarch64_new_section_hook
10005 #define elf_backend_adjust_dynamic_symbol \
10006 elfNN_aarch64_adjust_dynamic_symbol
10008 #define elf_backend_always_size_sections \
10009 elfNN_aarch64_always_size_sections
10011 #define elf_backend_check_relocs \
10012 elfNN_aarch64_check_relocs
10014 #define elf_backend_copy_indirect_symbol \
10015 elfNN_aarch64_copy_indirect_symbol
10017 #define elf_backend_merge_symbol_attribute \
10018 elfNN_aarch64_merge_symbol_attribute
10020 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
10021 to them in our hash. */
10022 #define elf_backend_create_dynamic_sections \
10023 elfNN_aarch64_create_dynamic_sections
10025 #define elf_backend_init_index_section \
10026 _bfd_elf_init_2_index_sections
10028 #define elf_backend_finish_dynamic_sections \
10029 elfNN_aarch64_finish_dynamic_sections
10031 #define elf_backend_finish_dynamic_symbol \
10032 elfNN_aarch64_finish_dynamic_symbol
10034 #define elf_backend_object_p \
10035 elfNN_aarch64_object_p
10037 #define elf_backend_output_arch_local_syms \
10038 elfNN_aarch64_output_arch_local_syms
10040 #define elf_backend_maybe_function_sym \
10041 elfNN_aarch64_maybe_function_sym
10043 #define elf_backend_plt_sym_val \
10044 elfNN_aarch64_plt_sym_val
10046 #define elf_backend_init_file_header \
10047 elfNN_aarch64_init_file_header
10049 #define elf_backend_relocate_section \
10050 elfNN_aarch64_relocate_section
10052 #define elf_backend_reloc_type_class \
10053 elfNN_aarch64_reloc_type_class
10055 #define elf_backend_section_from_shdr \
10056 elfNN_aarch64_section_from_shdr
10058 #define elf_backend_size_dynamic_sections \
10059 elfNN_aarch64_size_dynamic_sections
10061 #define elf_backend_size_info \
10062 elfNN_aarch64_size_info
10064 #define elf_backend_write_section \
10065 elfNN_aarch64_write_section
10067 #define elf_backend_symbol_processing \
10068 elfNN_aarch64_backend_symbol_processing
10070 #define elf_backend_setup_gnu_properties \
10071 elfNN_aarch64_link_setup_gnu_properties
10073 #define elf_backend_merge_gnu_properties \
10074 elfNN_aarch64_merge_gnu_properties
10076 #define elf_backend_can_refcount 1
10077 #define elf_backend_can_gc_sections 1
10078 #define elf_backend_plt_readonly 1
10079 #define elf_backend_want_got_plt 1
10080 #define elf_backend_want_plt_sym 0
10081 #define elf_backend_want_dynrelro 1
10082 #define elf_backend_may_use_rel_p 0
10083 #define elf_backend_may_use_rela_p 1
10084 #define elf_backend_default_use_rela_p 1
10085 #define elf_backend_rela_normal 1
10086 #define elf_backend_dtrel_excludes_plt 1
10087 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
10088 #define elf_backend_default_execstack 0
10089 #define elf_backend_extern_protected_data 1
10090 #define elf_backend_hash_symbol elf_aarch64_hash_symbol
10092 #undef elf_backend_obj_attrs_section
10093 #define elf_backend_obj_attrs_section ".ARM.attributes"
10095 #include "elfNN-target.h"
10097 /* CloudABI support. */
10099 #undef TARGET_LITTLE_SYM
10100 #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec
10101 #undef TARGET_LITTLE_NAME
10102 #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi"
10103 #undef TARGET_BIG_SYM
10104 #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec
10105 #undef TARGET_BIG_NAME
10106 #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi"
10109 #define ELF_OSABI ELFOSABI_CLOUDABI
10112 #define elfNN_bed elfNN_aarch64_cloudabi_bed
10114 #include "elfNN-target.h"