1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2020 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 bfd_boolean 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 const Elf_Internal_Sym
*isym
,
2858 bfd_boolean definition ATTRIBUTE_UNUSED
,
2859 bfd_boolean dynamic ATTRIBUTE_UNUSED
)
2861 unsigned int isym_sto
= isym
->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
))
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 bfd_boolean 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 bfd_boolean
*pair
, bfd_boolean
*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 bfd_boolean stubs_always_before_branch
;
4274 bfd_boolean 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 bfd_boolean
*unresolved_reloc_p
)
4844 bfd_vma off
= (bfd_vma
) - 1;
4845 asection
*basegot
= globals
->root
.sgot
;
4846 bfd_boolean 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 bfd_boolean 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 bfd_boolean
*unresolved_reloc_p
,
5431 bfd_boolean save_addend
,
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
;
5444 bfd_boolean weak_undef_p
;
5445 bfd_boolean relative_reloc
;
5447 bfd_vma orig_value
= value
;
5448 bfd_boolean resolved_to_zero
;
5449 bfd_boolean abs_symbol_p
;
5450 bfd_boolean via_plt_p
;
5452 globals
= elf_aarch64_hash_table (info
);
5454 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
5456 BFD_ASSERT (is_aarch64_elf (input_bfd
));
5458 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
5460 place
= input_section
->output_section
->vma
5461 + input_section
->output_offset
+ rel
->r_offset
;
5463 /* Get addend, accumulating the addend for consecutive relocs
5464 which refer to the same offset. */
5465 signed_addend
= saved_addend
? *saved_addend
: 0;
5466 signed_addend
+= rel
->r_addend
;
5468 weak_undef_p
= (h
? h
->root
.type
== bfd_link_hash_undefweak
5469 : bfd_is_und_section (sym_sec
));
5470 abs_symbol_p
= h
!= NULL
&& bfd_is_abs_symbol (&h
->root
);
5472 via_plt_p
= (globals
->root
.splt
!= NULL
&& h
!= NULL
5473 && h
->plt
.offset
!= (bfd_vma
) - 1);
5475 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
5476 it here if it is defined in a non-shared object. */
5478 && h
->type
== STT_GNU_IFUNC
5485 if ((input_section
->flags
& SEC_ALLOC
) == 0)
5487 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
5488 STT_GNU_IFUNC symbol as STT_FUNC. */
5489 if (elf_section_type (input_section
) == SHT_NOTE
)
5492 /* Dynamic relocs are not propagated for SEC_DEBUGGING
5493 sections because such sections are not SEC_ALLOC and
5494 thus ld.so will not process them. */
5495 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
5496 return bfd_reloc_ok
;
5498 if (h
->root
.root
.string
)
5499 name
= h
->root
.root
.string
;
5501 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
, NULL
);
5503 /* xgettext:c-format */
5504 (_("%pB(%pA+%#" PRIx64
"): "
5505 "unresolvable %s relocation against symbol `%s'"),
5506 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
5508 bfd_set_error (bfd_error_bad_value
);
5509 return bfd_reloc_notsupported
;
5511 else if (h
->plt
.offset
== (bfd_vma
) -1)
5512 goto bad_ifunc_reloc
;
5514 /* STT_GNU_IFUNC symbol must go through PLT. */
5515 plt
= globals
->root
.splt
? globals
->root
.splt
: globals
->root
.iplt
;
5516 value
= (plt
->output_section
->vma
+ plt
->output_offset
+ h
->plt
.offset
);
5522 if (h
->root
.root
.string
)
5523 name
= h
->root
.root
.string
;
5525 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
5528 /* xgettext:c-format */
5529 (_("%pB: relocation %s against STT_GNU_IFUNC "
5530 "symbol `%s' isn't handled by %s"), input_bfd
,
5531 howto
->name
, name
, __FUNCTION__
);
5532 bfd_set_error (bfd_error_bad_value
);
5533 return bfd_reloc_notsupported
;
5535 case BFD_RELOC_AARCH64_NN
:
5536 if (rel
->r_addend
!= 0)
5538 if (h
->root
.root
.string
)
5539 name
= h
->root
.root
.string
;
5541 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
5544 /* xgettext:c-format */
5545 (_("%pB: relocation %s against STT_GNU_IFUNC "
5546 "symbol `%s' has non-zero addend: %" PRId64
),
5547 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
5548 bfd_set_error (bfd_error_bad_value
);
5549 return bfd_reloc_notsupported
;
5552 /* Generate dynamic relocation only when there is a
5553 non-GOT reference in a shared object. */
5554 if (bfd_link_pic (info
) && h
->non_got_ref
)
5556 Elf_Internal_Rela outrel
;
5559 /* Need a dynamic relocation to get the real function
5561 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
5565 if (outrel
.r_offset
== (bfd_vma
) -1
5566 || outrel
.r_offset
== (bfd_vma
) -2)
5569 outrel
.r_offset
+= (input_section
->output_section
->vma
5570 + input_section
->output_offset
);
5572 if (h
->dynindx
== -1
5574 || bfd_link_executable (info
))
5576 /* This symbol is resolved locally. */
5577 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
5578 outrel
.r_addend
= (h
->root
.u
.def
.value
5579 + h
->root
.u
.def
.section
->output_section
->vma
5580 + h
->root
.u
.def
.section
->output_offset
);
5584 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5585 outrel
.r_addend
= 0;
5588 sreloc
= globals
->root
.irelifunc
;
5589 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5591 /* If this reloc is against an external symbol, we
5592 do not want to fiddle with the addend. Otherwise,
5593 we need to include the symbol value so that it
5594 becomes an addend for the dynamic reloc. For an
5595 internal symbol, we have updated addend. */
5596 return bfd_reloc_ok
;
5599 case BFD_RELOC_AARCH64_CALL26
:
5600 case BFD_RELOC_AARCH64_JUMP26
:
5601 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5605 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5607 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5608 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5609 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5610 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5611 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5612 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5613 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5614 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5615 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5616 base_got
= globals
->root
.sgot
;
5617 off
= h
->got
.offset
;
5619 if (base_got
== NULL
)
5622 if (off
== (bfd_vma
) -1)
5626 /* We can't use h->got.offset here to save state, or
5627 even just remember the offset, as finish_dynamic_symbol
5628 would use that as offset into .got. */
5630 if (globals
->root
.splt
!= NULL
)
5632 plt_index
= ((h
->plt
.offset
- globals
->plt_header_size
) /
5633 globals
->plt_entry_size
);
5634 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
5635 base_got
= globals
->root
.sgotplt
;
5639 plt_index
= h
->plt
.offset
/ globals
->plt_entry_size
;
5640 off
= plt_index
* GOT_ENTRY_SIZE
;
5641 base_got
= globals
->root
.igotplt
;
5644 if (h
->dynindx
== -1
5648 /* This references the local definition. We must
5649 initialize this entry in the global offset table.
5650 Since the offset must always be a multiple of 8,
5651 we use the least significant bit to record
5652 whether we have initialized it already.
5654 When doing a dynamic link, we create a .rela.got
5655 relocation entry to initialize the value. This
5656 is done in the finish_dynamic_symbol routine. */
5661 bfd_put_NN (output_bfd
, value
,
5662 base_got
->contents
+ off
);
5663 /* Note that this is harmless as -1 | 1 still is -1. */
5667 value
= (base_got
->output_section
->vma
5668 + base_got
->output_offset
+ off
);
5671 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
,
5673 unresolved_reloc_p
);
5675 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5676 addend
= (globals
->root
.sgot
->output_section
->vma
5677 + globals
->root
.sgot
->output_offset
);
5679 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5681 addend
, weak_undef_p
);
5682 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
, howto
, value
);
5683 case BFD_RELOC_AARCH64_ADD_LO12
:
5684 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5690 resolved_to_zero
= (h
!= NULL
5691 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
5695 case BFD_RELOC_AARCH64_NONE
:
5696 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5697 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5698 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5699 *unresolved_reloc_p
= FALSE
;
5700 return bfd_reloc_ok
;
5702 case BFD_RELOC_AARCH64_NN
:
5704 /* When generating a shared object or relocatable executable, these
5705 relocations are copied into the output file to be resolved at
5707 if (((bfd_link_pic (info
)
5708 || globals
->root
.is_relocatable_executable
)
5709 && (input_section
->flags
& SEC_ALLOC
)
5711 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5712 && !resolved_to_zero
)
5713 || h
->root
.type
!= bfd_link_hash_undefweak
))
5714 /* Or we are creating an executable, we may need to keep relocations
5715 for symbols satisfied by a dynamic library if we manage to avoid
5716 copy relocs for the symbol. */
5717 || (ELIMINATE_COPY_RELOCS
5718 && !bfd_link_pic (info
)
5720 && (input_section
->flags
& SEC_ALLOC
)
5725 || h
->root
.type
== bfd_link_hash_undefweak
5726 || h
->root
.type
== bfd_link_hash_undefined
)))
5728 Elf_Internal_Rela outrel
;
5730 bfd_boolean skip
, relocate
;
5733 *unresolved_reloc_p
= FALSE
;
5738 outrel
.r_addend
= signed_addend
;
5740 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5742 if (outrel
.r_offset
== (bfd_vma
) - 1)
5744 else if (outrel
.r_offset
== (bfd_vma
) - 2)
5749 else if (abs_symbol_p
)
5751 /* Local absolute symbol. */
5752 skip
= (h
->forced_local
|| (h
->dynindx
== -1));
5756 outrel
.r_offset
+= (input_section
->output_section
->vma
5757 + input_section
->output_offset
);
5760 memset (&outrel
, 0, sizeof outrel
);
5763 && (!bfd_link_pic (info
)
5764 || !(bfd_link_pie (info
) || SYMBOLIC_BIND (info
, h
))
5765 || !h
->def_regular
))
5766 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5771 /* On SVR4-ish systems, the dynamic loader cannot
5772 relocate the text and data segments independently,
5773 so the symbol does not matter. */
5775 relocate
= globals
->no_apply_dynamic_relocs
? FALSE
: TRUE
;
5776 outrel
.r_info
= ELFNN_R_INFO (symbol
, AARCH64_R (RELATIVE
));
5777 outrel
.r_addend
+= value
;
5780 sreloc
= elf_section_data (input_section
)->sreloc
;
5781 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
5782 return bfd_reloc_notsupported
;
5784 loc
= sreloc
->contents
+ sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
5785 bfd_elfNN_swap_reloca_out (output_bfd
, &outrel
, loc
);
5787 if (sreloc
->reloc_count
* RELOC_SIZE (globals
) > sreloc
->size
)
5789 /* Sanity to check that we have previously allocated
5790 sufficient space in the relocation section for the
5791 number of relocations we actually want to emit. */
5795 /* If this reloc is against an external symbol, we do not want to
5796 fiddle with the addend. Otherwise, we need to include the symbol
5797 value so that it becomes an addend for the dynamic reloc. */
5799 return bfd_reloc_ok
;
5801 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5802 contents
, rel
->r_offset
, value
,
5806 value
+= signed_addend
;
5809 case BFD_RELOC_AARCH64_BRANCH19
:
5810 case BFD_RELOC_AARCH64_TSTBR14
:
5811 /* A conditional branch to an undefined weak symbol is converted to a
5812 branch to itself. */
5813 if (weak_undef_p
&& !via_plt_p
)
5815 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5822 case BFD_RELOC_AARCH64_CALL26
:
5823 case BFD_RELOC_AARCH64_JUMP26
:
5825 asection
*splt
= globals
->root
.splt
;
5827 /* A call to an undefined weak symbol is converted to a jump to
5828 the next instruction unless a PLT entry will be created.
5829 The jump to the next instruction is optimized as a NOP.
5830 Do the same for local undefined symbols. */
5831 if (weak_undef_p
&& ! via_plt_p
)
5833 bfd_putl32 (INSN_NOP
, hit_data
);
5834 return bfd_reloc_ok
;
5837 /* If the call goes through a PLT entry, make sure to
5838 check distance to the right destination address. */
5840 value
= (splt
->output_section
->vma
5841 + splt
->output_offset
+ h
->plt
.offset
);
5843 /* Check if a stub has to be inserted because the destination
5845 struct elf_aarch64_stub_hash_entry
*stub_entry
= NULL
;
5847 /* If the branch destination is directed to plt stub, "value" will be
5848 the final destination, otherwise we should plus signed_addend, it may
5849 contain non-zero value, for example call to local function symbol
5850 which are turned into "sec_sym + sec_off", and sec_off is kept in
5852 if (! aarch64_valid_branch_p (via_plt_p
? value
: value
+ signed_addend
,
5854 /* The target is out of reach, so redirect the branch to
5855 the local stub for this function. */
5856 stub_entry
= elfNN_aarch64_get_stub_entry (input_section
, sym_sec
, h
,
5858 if (stub_entry
!= NULL
)
5860 value
= (stub_entry
->stub_offset
5861 + stub_entry
->stub_sec
->output_offset
5862 + stub_entry
->stub_sec
->output_section
->vma
);
5864 /* We have redirected the destination to stub entry address,
5865 so ignore any addend record in the original rela entry. */
5869 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5871 signed_addend
, weak_undef_p
);
5872 *unresolved_reloc_p
= FALSE
;
5875 case BFD_RELOC_AARCH64_16_PCREL
:
5876 case BFD_RELOC_AARCH64_32_PCREL
:
5877 case BFD_RELOC_AARCH64_64_PCREL
:
5878 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
5879 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5880 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
5881 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
5882 case BFD_RELOC_AARCH64_MOVW_PREL_G0
:
5883 case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC
:
5884 case BFD_RELOC_AARCH64_MOVW_PREL_G1
:
5885 case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC
:
5886 case BFD_RELOC_AARCH64_MOVW_PREL_G2
:
5887 case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC
:
5888 case BFD_RELOC_AARCH64_MOVW_PREL_G3
:
5889 if (bfd_link_pic (info
)
5890 && (input_section
->flags
& SEC_ALLOC
) != 0
5891 && (input_section
->flags
& SEC_READONLY
) != 0
5892 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
5894 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5897 /* xgettext:c-format */
5898 (_("%pB: relocation %s against symbol `%s' which may bind "
5899 "externally can not be used when making a shared object; "
5900 "recompile with -fPIC"),
5901 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
5902 h
->root
.root
.string
);
5903 bfd_set_error (bfd_error_bad_value
);
5904 return bfd_reloc_notsupported
;
5908 case BFD_RELOC_AARCH64_16
:
5910 case BFD_RELOC_AARCH64_32
:
5912 case BFD_RELOC_AARCH64_ADD_LO12
:
5913 case BFD_RELOC_AARCH64_LDST128_LO12
:
5914 case BFD_RELOC_AARCH64_LDST16_LO12
:
5915 case BFD_RELOC_AARCH64_LDST32_LO12
:
5916 case BFD_RELOC_AARCH64_LDST64_LO12
:
5917 case BFD_RELOC_AARCH64_LDST8_LO12
:
5918 case BFD_RELOC_AARCH64_MOVW_G0
:
5919 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
5920 case BFD_RELOC_AARCH64_MOVW_G0_S
:
5921 case BFD_RELOC_AARCH64_MOVW_G1
:
5922 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
5923 case BFD_RELOC_AARCH64_MOVW_G1_S
:
5924 case BFD_RELOC_AARCH64_MOVW_G2
:
5925 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
5926 case BFD_RELOC_AARCH64_MOVW_G2_S
:
5927 case BFD_RELOC_AARCH64_MOVW_G3
:
5928 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5930 signed_addend
, weak_undef_p
);
5933 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5934 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5935 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5936 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5937 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5938 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5939 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5940 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5941 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5942 if (globals
->root
.sgot
== NULL
)
5943 BFD_ASSERT (h
!= NULL
);
5945 relative_reloc
= FALSE
;
5950 /* If a symbol is not dynamic and is not undefined weak, bind it
5951 locally and generate a RELATIVE relocation under PIC mode.
5953 NOTE: one symbol may be referenced by several relocations, we
5954 should only generate one RELATIVE relocation for that symbol.
5955 Therefore, check GOT offset mark first. */
5956 if (h
->dynindx
== -1
5958 && h
->root
.type
!= bfd_link_hash_undefweak
5959 && bfd_link_pic (info
)
5960 && !symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5961 relative_reloc
= TRUE
;
5963 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5965 unresolved_reloc_p
);
5966 /* Record the GOT entry address which will be used when generating
5967 RELATIVE relocation. */
5969 got_entry_addr
= value
;
5971 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5972 addend
= (globals
->root
.sgot
->output_section
->vma
5973 + globals
->root
.sgot
->output_offset
);
5974 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
5976 addend
, weak_undef_p
);
5981 struct elf_aarch64_local_symbol
*locals
5982 = elf_aarch64_locals (input_bfd
);
5986 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5988 /* xgettext:c-format */
5989 (_("%pB: local symbol descriptor table be NULL when applying "
5990 "relocation %s against local symbol"),
5991 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5995 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5996 base_got
= globals
->root
.sgot
;
5997 got_entry_addr
= (base_got
->output_section
->vma
5998 + base_got
->output_offset
+ off
);
6000 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6002 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
6004 /* For local symbol, we have done absolute relocation in static
6005 linking stage. While for shared library, we need to update the
6006 content of GOT entry according to the shared object's runtime
6007 base address. So, we need to generate a R_AARCH64_RELATIVE reloc
6008 for dynamic linker. */
6009 if (bfd_link_pic (info
))
6010 relative_reloc
= TRUE
;
6012 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6015 /* Update the relocation value to GOT entry addr as we have transformed
6016 the direct data access into indirect data access through GOT. */
6017 value
= got_entry_addr
;
6019 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
6020 addend
= base_got
->output_section
->vma
+ base_got
->output_offset
;
6022 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6024 addend
, weak_undef_p
);
6030 Elf_Internal_Rela outrel
;
6032 s
= globals
->root
.srelgot
;
6036 outrel
.r_offset
= got_entry_addr
;
6037 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
6038 outrel
.r_addend
= orig_value
;
6039 elf_append_rela (output_bfd
, s
, &outrel
);
6043 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6044 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6045 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6046 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6047 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
6048 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
6049 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6050 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6051 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6052 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6053 if (globals
->root
.sgot
== NULL
)
6054 return bfd_reloc_notsupported
;
6056 value
= (symbol_got_offset (input_bfd
, h
, r_symndx
)
6057 + globals
->root
.sgot
->output_section
->vma
6058 + globals
->root
.sgot
->output_offset
);
6060 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6063 *unresolved_reloc_p
= FALSE
;
6066 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6067 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6068 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6069 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6070 if (globals
->root
.sgot
== NULL
)
6071 return bfd_reloc_notsupported
;
6073 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6074 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6077 *unresolved_reloc_p
= FALSE
;
6080 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12
:
6081 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
:
6082 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC
:
6083 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12
:
6084 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC
:
6085 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12
:
6086 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC
:
6087 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12
:
6088 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC
:
6089 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12
:
6090 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC
:
6091 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0
:
6092 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC
:
6093 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1
:
6094 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC
:
6095 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2
:
6097 if (!(weak_undef_p
|| elf_hash_table (info
)->tls_sec
))
6099 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
6101 /* xgettext:c-format */
6102 (_("%pB: TLS relocation %s against undefined symbol `%s'"),
6103 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
6104 h
->root
.root
.string
);
6105 bfd_set_error (bfd_error_bad_value
);
6106 return bfd_reloc_notsupported
;
6110 = weak_undef_p
? 0 : signed_addend
- dtpoff_base (info
);
6111 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6113 def_value
, weak_undef_p
);
6117 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
6118 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
6119 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
6120 case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12
:
6121 case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC
:
6122 case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12
:
6123 case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC
:
6124 case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12
:
6125 case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC
:
6126 case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12
:
6127 case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC
:
6128 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
6129 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
6130 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
6131 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
6132 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
6134 if (!(weak_undef_p
|| elf_hash_table (info
)->tls_sec
))
6136 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
6138 /* xgettext:c-format */
6139 (_("%pB: TLS relocation %s against undefined symbol `%s'"),
6140 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
6141 h
->root
.root
.string
);
6142 bfd_set_error (bfd_error_bad_value
);
6143 return bfd_reloc_notsupported
;
6147 = weak_undef_p
? 0 : signed_addend
- tpoff_base (info
);
6148 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6150 def_value
, weak_undef_p
);
6151 *unresolved_reloc_p
= FALSE
;
6155 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6156 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6157 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6158 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
6159 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
6160 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6161 if (globals
->root
.sgot
== NULL
)
6162 return bfd_reloc_notsupported
;
6163 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
6164 + globals
->root
.sgotplt
->output_section
->vma
6165 + globals
->root
.sgotplt
->output_offset
6166 + globals
->sgotplt_jump_table_size
);
6168 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6171 *unresolved_reloc_p
= FALSE
;
6174 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6175 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6176 if (globals
->root
.sgot
== NULL
)
6177 return bfd_reloc_notsupported
;
6179 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
6180 + globals
->root
.sgotplt
->output_section
->vma
6181 + globals
->root
.sgotplt
->output_offset
6182 + globals
->sgotplt_jump_table_size
);
6184 value
-= (globals
->root
.sgot
->output_section
->vma
6185 + globals
->root
.sgot
->output_offset
);
6187 value
= _bfd_aarch64_elf_resolve_relocation (input_bfd
, bfd_r_type
,
6190 *unresolved_reloc_p
= FALSE
;
6194 return bfd_reloc_notsupported
;
6198 *saved_addend
= value
;
6200 /* Only apply the final relocation in a sequence. */
6202 return bfd_reloc_continue
;
6204 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
6208 /* LP64 and ILP32 operates on x- and w-registers respectively.
6209 Next definitions take into account the difference between
6210 corresponding machine codes. R means x-register if the target
6211 arch is LP64, and w-register if the target is ILP32. */
6214 # define add_R0_R0 (0x91000000)
6215 # define add_R0_R0_R1 (0x8b000020)
6216 # define add_R0_R1 (0x91400020)
6217 # define ldr_R0 (0x58000000)
6218 # define ldr_R0_mask(i) (i & 0xffffffe0)
6219 # define ldr_R0_x0 (0xf9400000)
6220 # define ldr_hw_R0 (0xf2a00000)
6221 # define movk_R0 (0xf2800000)
6222 # define movz_R0 (0xd2a00000)
6223 # define movz_hw_R0 (0xd2c00000)
6224 #else /*ARCH_SIZE == 32 */
6225 # define add_R0_R0 (0x11000000)
6226 # define add_R0_R0_R1 (0x0b000020)
6227 # define add_R0_R1 (0x11400020)
6228 # define ldr_R0 (0x18000000)
6229 # define ldr_R0_mask(i) (i & 0xbfffffe0)
6230 # define ldr_R0_x0 (0xb9400000)
6231 # define ldr_hw_R0 (0x72a00000)
6232 # define movk_R0 (0x72800000)
6233 # define movz_R0 (0x52a00000)
6234 # define movz_hw_R0 (0x52c00000)
6237 /* Structure to hold payload for _bfd_aarch64_erratum_843419_clear_stub,
6238 it is used to identify the stub information to reset. */
6240 struct erratum_843419_branch_to_stub_clear_data
6242 bfd_vma adrp_offset
;
6243 asection
*output_section
;
6246 /* Clear the erratum information for GEN_ENTRY if the ADRP_OFFSET and
6247 section inside IN_ARG matches. The clearing is done by setting the
6248 stub_type to none. */
6251 _bfd_aarch64_erratum_843419_clear_stub (struct bfd_hash_entry
*gen_entry
,
6254 struct elf_aarch64_stub_hash_entry
*stub_entry
6255 = (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
6256 struct erratum_843419_branch_to_stub_clear_data
*data
6257 = (struct erratum_843419_branch_to_stub_clear_data
*) in_arg
;
6259 if (stub_entry
->target_section
!= data
->output_section
6260 || stub_entry
->stub_type
!= aarch64_stub_erratum_843419_veneer
6261 || stub_entry
->adrp_offset
!= data
->adrp_offset
)
6264 /* Change the stub type instead of removing the entry, removing from the hash
6265 table would be slower and we have already reserved the memory for the entry
6266 so there wouldn't be much gain. Changing the stub also keeps around a
6267 record of what was there before. */
6268 stub_entry
->stub_type
= aarch64_stub_none
;
6270 /* We're done and there could have been only one matching stub at that
6271 particular offset, so abort further traversal. */
6275 /* TLS Relaxations may relax an adrp sequence that matches the erratum 843419
6276 sequence. In this case the erratum no longer applies and we need to remove
6277 the entry from the pending stub generation. This clears matching adrp insn
6278 at ADRP_OFFSET in INPUT_SECTION in the stub table defined in GLOBALS. */
6281 clear_erratum_843419_entry (struct elf_aarch64_link_hash_table
*globals
,
6282 bfd_vma adrp_offset
, asection
*input_section
)
6284 if (globals
->fix_erratum_843419
& ERRAT_ADRP
)
6286 struct erratum_843419_branch_to_stub_clear_data data
;
6287 data
.adrp_offset
= adrp_offset
;
6288 data
.output_section
= input_section
;
6290 bfd_hash_traverse (&globals
->stub_hash_table
,
6291 _bfd_aarch64_erratum_843419_clear_stub
, &data
);
6295 /* Handle TLS relaxations. Relaxing is possible for symbols that use
6296 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
6299 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
6300 is to then call final_link_relocate. Return other values in the
6303 static bfd_reloc_status_type
6304 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table
*globals
,
6305 bfd
*input_bfd
, asection
*input_section
,
6306 bfd_byte
*contents
, Elf_Internal_Rela
*rel
,
6307 struct elf_link_hash_entry
*h
)
6309 bfd_boolean is_local
= h
== NULL
;
6310 unsigned int r_type
= ELFNN_R_TYPE (rel
->r_info
);
6313 BFD_ASSERT (globals
&& input_bfd
&& contents
&& rel
);
6315 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
))
6317 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6318 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6321 /* GD->LE relaxation:
6322 adrp x0, :tlsgd:var => movz R0, :tprel_g1:var
6324 adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var
6326 Where R is x for LP64, and w for ILP32. */
6327 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
6328 /* We have relaxed the adrp into a mov, we may have to clear any
6329 pending erratum fixes. */
6330 clear_erratum_843419_entry (globals
, rel
->r_offset
, input_section
);
6331 return bfd_reloc_continue
;
6335 /* GD->IE relaxation:
6336 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
6338 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
6340 return bfd_reloc_continue
;
6343 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6347 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6350 /* Tiny TLSDESC->LE relaxation:
6351 ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var
6352 adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var
6356 Where R is x for LP64, and w for ILP32. */
6357 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
6358 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
6360 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6361 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
6362 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6364 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
6365 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 4);
6366 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
6367 return bfd_reloc_continue
;
6371 /* Tiny TLSDESC->IE relaxation:
6372 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
6373 adr x0, :tlsdesc:var => nop
6377 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
6378 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
6380 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6381 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6383 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
6384 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
6385 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
6386 return bfd_reloc_continue
;
6389 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6392 /* Tiny GD->LE relaxation:
6393 adr x0, :tlsgd:var => mrs x1, tpidr_el0
6394 bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12
6395 nop => add R0, R0, #:tprel_lo12_nc:x
6397 Where R is x for LP64, and x for Ilp32. */
6399 /* First kill the tls_get_addr reloc on the bl instruction. */
6400 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6402 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 0);
6403 bfd_putl32 (add_R0_R1
, contents
+ rel
->r_offset
+ 4);
6404 bfd_putl32 (add_R0_R0
, contents
+ rel
->r_offset
+ 8);
6406 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6407 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
));
6408 rel
[1].r_offset
= rel
->r_offset
+ 8;
6410 /* Move the current relocation to the second instruction in
6413 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6414 AARCH64_R (TLSLE_ADD_TPREL_HI12
));
6415 return bfd_reloc_continue
;
6419 /* Tiny GD->IE relaxation:
6420 adr x0, :tlsgd:var => ldr R0, :gottprel:var
6421 bl __tls_get_addr => mrs x1, tpidr_el0
6422 nop => add R0, R0, R1
6424 Where R is x for LP64, and w for Ilp32. */
6426 /* First kill the tls_get_addr reloc on the bl instruction. */
6427 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6428 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6430 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
6431 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
6432 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
6433 return bfd_reloc_continue
;
6437 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6438 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSGD_MOVW_G0_NC
));
6439 BFD_ASSERT (rel
->r_offset
+ 12 == rel
[2].r_offset
);
6440 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (CALL26
));
6444 /* Large GD->LE relaxation:
6445 movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32
6446 movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16
6447 add x0, gp, x0 => movk x0, #:tprel_g0_nc:var
6448 bl __tls_get_addr => mrs x1, tpidr_el0
6449 nop => add x0, x0, x1
6451 rel
[2].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
6452 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
6453 rel
[2].r_offset
= rel
->r_offset
+ 8;
6455 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
+ 0);
6456 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
+ 4);
6457 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 8);
6458 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
6459 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
6463 /* Large GD->IE relaxation:
6464 movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16
6465 movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var
6466 add x0, gp, x0 => ldr x0, [gp, x0]
6467 bl __tls_get_addr => mrs x1, tpidr_el0
6468 nop => add x0, x0, x1
6470 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6471 bfd_putl32 (0xd2a80000, contents
+ rel
->r_offset
+ 0);
6472 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
+ 8);
6473 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
6474 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
6476 return bfd_reloc_continue
;
6478 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6479 return bfd_reloc_continue
;
6482 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6483 return bfd_reloc_continue
;
6485 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
6488 /* GD->LE relaxation:
6489 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
6491 Where R is x for lp64 mode, and w for ILP32 mode. */
6492 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6493 return bfd_reloc_continue
;
6497 /* GD->IE relaxation:
6498 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var]
6500 Where R is x for lp64 mode, and w for ILP32 mode. */
6501 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6502 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
6503 return bfd_reloc_continue
;
6506 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6509 /* GD->LE relaxation
6510 add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var
6511 bl __tls_get_addr => mrs x1, tpidr_el0
6512 nop => add R0, R1, R0
6514 Where R is x for lp64 mode, and w for ILP32 mode. */
6516 /* First kill the tls_get_addr reloc on the bl instruction. */
6517 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6518 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6520 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6521 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
6522 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
6523 return bfd_reloc_continue
;
6527 /* GD->IE relaxation
6528 ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var]
6529 BL __tls_get_addr => mrs x1, tpidr_el0
6531 NOP => add R0, R1, R0
6533 Where R is x for lp64 mode, and w for ilp32 mode. */
6535 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6537 /* Remove the relocation on the BL instruction. */
6538 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6540 /* We choose to fixup the BL and NOP instructions using the
6541 offset from the second relocation to allow flexibility in
6542 scheduling instructions between the ADD and BL. */
6543 bfd_putl32 (ldr_R0_x0
, contents
+ rel
->r_offset
);
6544 bfd_putl32 (0xd53bd041, contents
+ rel
[1].r_offset
);
6545 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
[1].r_offset
+ 4);
6546 return bfd_reloc_continue
;
6549 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
6550 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6551 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
6552 /* GD->IE/LE relaxation:
6553 add x0, x0, #:tlsdesc_lo12:var => nop
6556 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
);
6557 return bfd_reloc_ok
;
6559 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
6562 /* GD->LE relaxation:
6563 ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var
6565 Where R is x for lp64 mode, and w for ILP32 mode. */
6566 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6567 return bfd_reloc_continue
;
6571 /* GD->IE relaxation:
6572 ldr xd, [gp, xn] => ldr R0, [gp, xn]
6574 Where R is x for lp64 mode, and w for ILP32 mode. */
6575 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6576 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
6577 return bfd_reloc_ok
;
6580 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6581 /* GD->LE relaxation:
6582 movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16
6584 movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var
6586 Where R is x for lp64 mode, and w for ILP32 mode. */
6588 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
);
6589 return bfd_reloc_continue
;
6591 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6594 /* GD->LE relaxation:
6595 movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32
6597 Where R is x for lp64 mode, and w for ILP32 mode. */
6598 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
);
6599 return bfd_reloc_continue
;
6603 /* GD->IE relaxation:
6604 movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16
6606 Where R is x for lp64 mode, and w for ILP32 mode. */
6607 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6608 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6609 return bfd_reloc_continue
;
6612 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6613 /* IE->LE relaxation:
6614 adrp xd, :gottprel:var => movz Rd, :tprel_g1:var
6616 Where R is x for lp64 mode, and w for ILP32 mode. */
6619 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6620 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6621 /* We have relaxed the adrp into a mov, we may have to clear any
6622 pending erratum fixes. */
6623 clear_erratum_843419_entry (globals
, rel
->r_offset
, input_section
);
6625 return bfd_reloc_continue
;
6627 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6628 /* IE->LE relaxation:
6629 ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var
6631 Where R is x for lp64 mode, and w for ILP32 mode. */
6634 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6635 bfd_putl32 (movk_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6637 return bfd_reloc_continue
;
6639 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6640 /* LD->LE relaxation (tiny):
6641 adr x0, :tlsldm:x => mrs x0, tpidr_el0
6642 bl __tls_get_addr => add R0, R0, TCB_SIZE
6644 Where R is x for lp64 mode, and w for ilp32 mode. */
6647 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6648 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6649 /* No need of CALL26 relocation for tls_get_addr. */
6650 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6651 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
+ 0);
6652 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6653 contents
+ rel
->r_offset
+ 4);
6654 return bfd_reloc_ok
;
6656 return bfd_reloc_continue
;
6658 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6659 /* LD->LE relaxation (small):
6660 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
6664 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
);
6665 return bfd_reloc_ok
;
6667 return bfd_reloc_continue
;
6669 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6670 /* LD->LE relaxation (small):
6671 add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE
6672 bl __tls_get_addr => nop
6674 Where R is x for lp64 mode, and w for ilp32 mode. */
6677 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6678 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6679 /* No need of CALL26 relocation for tls_get_addr. */
6680 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6681 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6682 contents
+ rel
->r_offset
+ 0);
6683 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
6684 return bfd_reloc_ok
;
6686 return bfd_reloc_continue
;
6689 return bfd_reloc_continue
;
6692 return bfd_reloc_ok
;
6695 /* Relocate an AArch64 ELF section. */
6698 elfNN_aarch64_relocate_section (bfd
*output_bfd
,
6699 struct bfd_link_info
*info
,
6701 asection
*input_section
,
6703 Elf_Internal_Rela
*relocs
,
6704 Elf_Internal_Sym
*local_syms
,
6705 asection
**local_sections
)
6707 Elf_Internal_Shdr
*symtab_hdr
;
6708 struct elf_link_hash_entry
**sym_hashes
;
6709 Elf_Internal_Rela
*rel
;
6710 Elf_Internal_Rela
*relend
;
6712 struct elf_aarch64_link_hash_table
*globals
;
6713 bfd_boolean save_addend
= FALSE
;
6716 globals
= elf_aarch64_hash_table (info
);
6718 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
6719 sym_hashes
= elf_sym_hashes (input_bfd
);
6722 relend
= relocs
+ input_section
->reloc_count
;
6723 for (; rel
< relend
; rel
++)
6725 unsigned int r_type
;
6726 bfd_reloc_code_real_type bfd_r_type
;
6727 bfd_reloc_code_real_type relaxed_bfd_r_type
;
6728 reloc_howto_type
*howto
;
6729 unsigned long r_symndx
;
6730 Elf_Internal_Sym
*sym
;
6732 struct elf_link_hash_entry
*h
;
6734 bfd_reloc_status_type r
;
6737 bfd_boolean unresolved_reloc
= FALSE
;
6738 char *error_message
= NULL
;
6740 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6741 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6743 bfd_reloc
.howto
= elfNN_aarch64_howto_from_type (input_bfd
, r_type
);
6744 howto
= bfd_reloc
.howto
;
6747 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
6749 bfd_r_type
= elfNN_aarch64_bfd_reloc_from_howto (howto
);
6755 if (r_symndx
< symtab_hdr
->sh_info
)
6757 sym
= local_syms
+ r_symndx
;
6758 sym_type
= ELFNN_ST_TYPE (sym
->st_info
);
6759 sec
= local_sections
[r_symndx
];
6761 /* An object file might have a reference to a local
6762 undefined symbol. This is a daft object file, but we
6763 should at least do something about it. */
6764 if (r_type
!= R_AARCH64_NONE
&& r_type
!= R_AARCH64_NULL
6765 && bfd_is_und_section (sec
)
6766 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
6767 (*info
->callbacks
->undefined_symbol
)
6768 (info
, bfd_elf_string_from_elf_section
6769 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
6770 input_bfd
, input_section
, rel
->r_offset
, TRUE
);
6772 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
6774 /* Relocate against local STT_GNU_IFUNC symbol. */
6775 if (!bfd_link_relocatable (info
)
6776 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
6778 h
= elfNN_aarch64_get_local_sym_hash (globals
, input_bfd
,
6783 /* Set STT_GNU_IFUNC symbol value. */
6784 h
->root
.u
.def
.value
= sym
->st_value
;
6785 h
->root
.u
.def
.section
= sec
;
6790 bfd_boolean warned
, ignored
;
6792 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
6793 r_symndx
, symtab_hdr
, sym_hashes
,
6795 unresolved_reloc
, warned
, ignored
);
6800 if (sec
!= NULL
&& discarded_section (sec
))
6801 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
6802 rel
, 1, relend
, howto
, 0, contents
);
6804 if (bfd_link_relocatable (info
))
6808 name
= h
->root
.root
.string
;
6811 name
= (bfd_elf_string_from_elf_section
6812 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
6813 if (name
== NULL
|| *name
== '\0')
6814 name
= bfd_section_name (sec
);
6818 && r_type
!= R_AARCH64_NONE
6819 && r_type
!= R_AARCH64_NULL
6821 || h
->root
.type
== bfd_link_hash_defined
6822 || h
->root
.type
== bfd_link_hash_defweak
)
6823 && IS_AARCH64_TLS_RELOC (bfd_r_type
) != (sym_type
== STT_TLS
))
6826 ((sym_type
== STT_TLS
6827 /* xgettext:c-format */
6828 ? _("%pB(%pA+%#" PRIx64
"): %s used with TLS symbol %s")
6829 /* xgettext:c-format */
6830 : _("%pB(%pA+%#" PRIx64
"): %s used with non-TLS symbol %s")),
6832 input_section
, (uint64_t) rel
->r_offset
, howto
->name
, name
);
6835 /* We relax only if we can see that there can be a valid transition
6836 from a reloc type to another.
6837 We call elfNN_aarch64_final_link_relocate unless we're completely
6838 done, i.e., the relaxation produced the final output we want. */
6840 relaxed_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
,
6842 if (relaxed_bfd_r_type
!= bfd_r_type
)
6844 bfd_r_type
= relaxed_bfd_r_type
;
6845 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
6846 BFD_ASSERT (howto
!= NULL
);
6847 r_type
= howto
->type
;
6848 r
= elfNN_aarch64_tls_relax (globals
, input_bfd
, input_section
,
6850 unresolved_reloc
= 0;
6853 r
= bfd_reloc_continue
;
6855 /* There may be multiple consecutive relocations for the
6856 same offset. In that case we are supposed to treat the
6857 output of each relocation as the addend for the next. */
6858 if (rel
+ 1 < relend
6859 && rel
->r_offset
== rel
[1].r_offset
6860 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NONE
6861 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NULL
)
6864 save_addend
= FALSE
;
6866 if (r
== bfd_reloc_continue
)
6867 r
= elfNN_aarch64_final_link_relocate (howto
, input_bfd
, output_bfd
,
6868 input_section
, contents
, rel
,
6869 relocation
, info
, sec
,
6870 h
, &unresolved_reloc
,
6871 save_addend
, &addend
, sym
);
6873 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
))
6875 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6876 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6877 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6878 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6879 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6880 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6881 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6882 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6883 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6885 bfd_boolean need_relocs
= FALSE
;
6890 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6891 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6894 (!bfd_link_executable (info
) || indx
!= 0) &&
6896 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6897 || h
->root
.type
!= bfd_link_hash_undefweak
);
6899 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6903 Elf_Internal_Rela rela
;
6904 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPMOD
));
6906 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6907 globals
->root
.sgot
->output_offset
+ off
;
6910 loc
= globals
->root
.srelgot
->contents
;
6911 loc
+= globals
->root
.srelgot
->reloc_count
++
6912 * RELOC_SIZE (htab
);
6913 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6915 bfd_reloc_code_real_type real_type
=
6916 elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
6918 if (real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6919 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6920 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
)
6922 /* For local dynamic, don't generate DTPREL in any case.
6923 Initialize the DTPREL slot into zero, so we get module
6924 base address when invoke runtime TLS resolver. */
6925 bfd_put_NN (output_bfd
, 0,
6926 globals
->root
.sgot
->contents
+ off
6931 bfd_put_NN (output_bfd
,
6932 relocation
- dtpoff_base (info
),
6933 globals
->root
.sgot
->contents
+ off
6938 /* This TLS symbol is global. We emit a
6939 relocation to fixup the tls offset at load
6942 ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPREL
));
6945 (globals
->root
.sgot
->output_section
->vma
6946 + globals
->root
.sgot
->output_offset
+ off
6949 loc
= globals
->root
.srelgot
->contents
;
6950 loc
+= globals
->root
.srelgot
->reloc_count
++
6951 * RELOC_SIZE (globals
);
6952 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6953 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6954 globals
->root
.sgot
->contents
+ off
6960 bfd_put_NN (output_bfd
, (bfd_vma
) 1,
6961 globals
->root
.sgot
->contents
+ off
);
6962 bfd_put_NN (output_bfd
,
6963 relocation
- dtpoff_base (info
),
6964 globals
->root
.sgot
->contents
+ off
6968 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6972 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6973 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6974 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6975 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6976 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6977 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6979 bfd_boolean need_relocs
= FALSE
;
6984 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6986 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6989 (!bfd_link_executable (info
) || indx
!= 0) &&
6991 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6992 || h
->root
.type
!= bfd_link_hash_undefweak
);
6994 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6998 Elf_Internal_Rela rela
;
7001 rela
.r_addend
= relocation
- dtpoff_base (info
);
7005 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_TPREL
));
7006 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
7007 globals
->root
.sgot
->output_offset
+ off
;
7009 loc
= globals
->root
.srelgot
->contents
;
7010 loc
+= globals
->root
.srelgot
->reloc_count
++
7011 * RELOC_SIZE (htab
);
7013 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7015 bfd_put_NN (output_bfd
, rela
.r_addend
,
7016 globals
->root
.sgot
->contents
+ off
);
7019 bfd_put_NN (output_bfd
, relocation
- tpoff_base (info
),
7020 globals
->root
.sgot
->contents
+ off
);
7022 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
7026 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
7027 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7028 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7029 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
7030 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7031 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
7032 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
7033 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd
, h
, r_symndx
))
7035 bfd_boolean need_relocs
= FALSE
;
7036 int indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
7037 bfd_vma off
= symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
);
7039 need_relocs
= (h
== NULL
7040 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
7041 || h
->root
.type
!= bfd_link_hash_undefweak
);
7043 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
7044 BFD_ASSERT (globals
->root
.sgot
!= NULL
);
7049 Elf_Internal_Rela rela
;
7050 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLSDESC
));
7053 rela
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
7054 + globals
->root
.sgotplt
->output_offset
7055 + off
+ globals
->sgotplt_jump_table_size
);
7058 rela
.r_addend
= relocation
- dtpoff_base (info
);
7060 /* Allocate the next available slot in the PLT reloc
7061 section to hold our R_AARCH64_TLSDESC, the next
7062 available slot is determined from reloc_count,
7063 which we step. But note, reloc_count was
7064 artifically moved down while allocating slots for
7065 real PLT relocs such that all of the PLT relocs
7066 will fit above the initial reloc_count and the
7067 extra stuff will fit below. */
7068 loc
= globals
->root
.srelplt
->contents
;
7069 loc
+= globals
->root
.srelplt
->reloc_count
++
7070 * RELOC_SIZE (globals
);
7072 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
7074 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
7075 globals
->root
.sgotplt
->contents
+ off
+
7076 globals
->sgotplt_jump_table_size
);
7077 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
7078 globals
->root
.sgotplt
->contents
+ off
+
7079 globals
->sgotplt_jump_table_size
+
7083 symbol_tlsdesc_got_offset_mark (input_bfd
, h
, r_symndx
);
7090 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
7091 because such sections are not SEC_ALLOC and thus ld.so will
7092 not process them. */
7093 if (unresolved_reloc
7094 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
7096 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
7097 +rel
->r_offset
) != (bfd_vma
) - 1)
7100 /* xgettext:c-format */
7101 (_("%pB(%pA+%#" PRIx64
"): "
7102 "unresolvable %s relocation against symbol `%s'"),
7103 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, howto
->name
,
7104 h
->root
.root
.string
);
7108 if (r
!= bfd_reloc_ok
&& r
!= bfd_reloc_continue
)
7110 bfd_reloc_code_real_type real_r_type
7111 = elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
7115 case bfd_reloc_overflow
:
7116 (*info
->callbacks
->reloc_overflow
)
7117 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
, (bfd_vma
) 0,
7118 input_bfd
, input_section
, rel
->r_offset
);
7119 if (real_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
7120 || real_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
7122 (*info
->callbacks
->warning
)
7124 _("too many GOT entries for -fpic, "
7125 "please recompile with -fPIC"),
7126 name
, input_bfd
, input_section
, rel
->r_offset
);
7129 /* Overflow can occur when a variable is referenced with a type
7130 that has a larger alignment than the type with which it was
7132 file1.c: extern int foo; int a (void) { return foo; }
7133 file2.c: char bar, foo, baz;
7134 If the variable is placed into a data section at an offset
7135 that is incompatible with the larger alignment requirement
7136 overflow will occur. (Strictly speaking this is not overflow
7137 but rather an alignment problem, but the bfd_reloc_ error
7138 enum does not have a value to cover that situation).
7140 Try to catch this situation here and provide a more helpful
7141 error message to the user. */
7142 if (addend
& (((bfd_vma
) 1 << howto
->rightshift
) - 1)
7143 /* FIXME: Are we testing all of the appropriate reloc
7145 && (real_r_type
== BFD_RELOC_AARCH64_LD_LO19_PCREL
7146 || real_r_type
== BFD_RELOC_AARCH64_LDST16_LO12
7147 || real_r_type
== BFD_RELOC_AARCH64_LDST32_LO12
7148 || real_r_type
== BFD_RELOC_AARCH64_LDST64_LO12
7149 || real_r_type
== BFD_RELOC_AARCH64_LDST128_LO12
))
7151 info
->callbacks
->warning
7152 (info
, _("one possible cause of this error is that the \
7153 symbol is being referenced in the indicated code as if it had a larger \
7154 alignment than was declared where it was defined"),
7155 name
, input_bfd
, input_section
, rel
->r_offset
);
7159 case bfd_reloc_undefined
:
7160 (*info
->callbacks
->undefined_symbol
)
7161 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
7164 case bfd_reloc_outofrange
:
7165 error_message
= _("out of range");
7168 case bfd_reloc_notsupported
:
7169 error_message
= _("unsupported relocation");
7172 case bfd_reloc_dangerous
:
7173 /* error_message should already be set. */
7177 error_message
= _("unknown error");
7181 BFD_ASSERT (error_message
!= NULL
);
7182 (*info
->callbacks
->reloc_dangerous
)
7183 (info
, error_message
, input_bfd
, input_section
, rel
->r_offset
);
7195 /* Set the right machine number. */
7198 elfNN_aarch64_object_p (bfd
*abfd
)
7201 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64_ilp32
);
7203 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64
);
7208 /* Function to keep AArch64 specific flags in the ELF header. */
7211 elfNN_aarch64_set_private_flags (bfd
*abfd
, flagword flags
)
7213 if (elf_flags_init (abfd
) && elf_elfheader (abfd
)->e_flags
!= flags
)
7218 elf_elfheader (abfd
)->e_flags
= flags
;
7219 elf_flags_init (abfd
) = TRUE
;
7225 /* Merge backend specific data from an object file to the output
7226 object file when linking. */
7229 elfNN_aarch64_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
7231 bfd
*obfd
= info
->output_bfd
;
7234 bfd_boolean flags_compatible
= TRUE
;
7237 /* Check if we have the same endianess. */
7238 if (!_bfd_generic_verify_endian_match (ibfd
, info
))
7241 if (!is_aarch64_elf (ibfd
) || !is_aarch64_elf (obfd
))
7244 /* The input BFD must have had its flags initialised. */
7245 /* The following seems bogus to me -- The flags are initialized in
7246 the assembler but I don't think an elf_flags_init field is
7247 written into the object. */
7248 /* BFD_ASSERT (elf_flags_init (ibfd)); */
7250 in_flags
= elf_elfheader (ibfd
)->e_flags
;
7251 out_flags
= elf_elfheader (obfd
)->e_flags
;
7253 if (!elf_flags_init (obfd
))
7255 /* If the input is the default architecture and had the default
7256 flags then do not bother setting the flags for the output
7257 architecture, instead allow future merges to do this. If no
7258 future merges ever set these flags then they will retain their
7259 uninitialised values, which surprise surprise, correspond
7260 to the default values. */
7261 if (bfd_get_arch_info (ibfd
)->the_default
7262 && elf_elfheader (ibfd
)->e_flags
== 0)
7265 elf_flags_init (obfd
) = TRUE
;
7266 elf_elfheader (obfd
)->e_flags
= in_flags
;
7268 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
7269 && bfd_get_arch_info (obfd
)->the_default
)
7270 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
7271 bfd_get_mach (ibfd
));
7276 /* Identical flags must be compatible. */
7277 if (in_flags
== out_flags
)
7280 /* Check to see if the input BFD actually contains any sections. If
7281 not, its flags may not have been initialised either, but it
7282 cannot actually cause any incompatiblity. Do not short-circuit
7283 dynamic objects; their section list may be emptied by
7284 elf_link_add_object_symbols.
7286 Also check to see if there are no code sections in the input.
7287 In this case there is no need to check for code specific flags.
7288 XXX - do we need to worry about floating-point format compatability
7289 in data sections ? */
7290 if (!(ibfd
->flags
& DYNAMIC
))
7292 bfd_boolean null_input_bfd
= TRUE
;
7293 bfd_boolean only_data_sections
= TRUE
;
7295 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
7297 if ((bfd_section_flags (sec
)
7298 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
7299 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
7300 only_data_sections
= FALSE
;
7302 null_input_bfd
= FALSE
;
7306 if (null_input_bfd
|| only_data_sections
)
7310 return flags_compatible
;
7313 /* Display the flags field. */
7316 elfNN_aarch64_print_private_bfd_data (bfd
*abfd
, void *ptr
)
7318 FILE *file
= (FILE *) ptr
;
7319 unsigned long flags
;
7321 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
7323 /* Print normal ELF private data. */
7324 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
7326 flags
= elf_elfheader (abfd
)->e_flags
;
7327 /* Ignore init flag - it may not be set, despite the flags field
7328 containing valid data. */
7330 /* xgettext:c-format */
7331 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
7334 fprintf (file
, _("<Unrecognised flag bits set>"));
7341 /* Return true if we need copy relocation against EH. */
7344 need_copy_relocation_p (struct elf_aarch64_link_hash_entry
*eh
)
7346 struct elf_dyn_relocs
*p
;
7349 for (p
= eh
->root
.dyn_relocs
; p
!= NULL
; p
= p
->next
)
7351 /* If there is any pc-relative reference, we need to keep copy relocation
7352 to avoid propagating the relocation into runtime that current glibc
7353 does not support. */
7357 s
= p
->sec
->output_section
;
7358 /* Need copy relocation if it's against read-only section. */
7359 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
7366 /* Adjust a symbol defined by a dynamic object and referenced by a
7367 regular object. The current definition is in some section of the
7368 dynamic object, but we're not including those sections. We have to
7369 change the definition to something the rest of the link can
7373 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
7374 struct elf_link_hash_entry
*h
)
7376 struct elf_aarch64_link_hash_table
*htab
;
7379 /* If this is a function, put it in the procedure linkage table. We
7380 will fill in the contents of the procedure linkage table later,
7381 when we know the address of the .got section. */
7382 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
7384 if (h
->plt
.refcount
<= 0
7385 || (h
->type
!= STT_GNU_IFUNC
7386 && (SYMBOL_CALLS_LOCAL (info
, h
)
7387 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
7388 && h
->root
.type
== bfd_link_hash_undefweak
))))
7390 /* This case can occur if we saw a CALL26 reloc in
7391 an input file, but the symbol wasn't referred to
7392 by a dynamic object or all references were
7393 garbage collected. In which case we can end up
7395 h
->plt
.offset
= (bfd_vma
) - 1;
7402 /* Otherwise, reset to -1. */
7403 h
->plt
.offset
= (bfd_vma
) - 1;
7406 /* If this is a weak symbol, and there is a real definition, the
7407 processor independent code will have arranged for us to see the
7408 real definition first, and we can just use the same value. */
7409 if (h
->is_weakalias
)
7411 struct elf_link_hash_entry
*def
= weakdef (h
);
7412 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
7413 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
7414 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
7415 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
7416 h
->non_got_ref
= def
->non_got_ref
;
7420 /* If we are creating a shared library, we must presume that the
7421 only references to the symbol are via the global offset table.
7422 For such cases we need not do anything here; the relocations will
7423 be handled correctly by relocate_section. */
7424 if (bfd_link_pic (info
))
7427 /* If there are no references to this symbol that do not use the
7428 GOT, we don't need to generate a copy reloc. */
7429 if (!h
->non_got_ref
)
7432 /* If -z nocopyreloc was given, we won't generate them either. */
7433 if (info
->nocopyreloc
)
7439 if (ELIMINATE_COPY_RELOCS
)
7441 struct elf_aarch64_link_hash_entry
*eh
;
7442 /* If we don't find any dynamic relocs in read-only sections, then
7443 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7444 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
7445 if (!need_copy_relocation_p (eh
))
7452 /* We must allocate the symbol in our .dynbss section, which will
7453 become part of the .bss section of the executable. There will be
7454 an entry for this symbol in the .dynsym section. The dynamic
7455 object will contain position independent code, so all references
7456 from the dynamic object to this symbol will go through the global
7457 offset table. The dynamic linker will use the .dynsym entry to
7458 determine the address it must put in the global offset table, so
7459 both the dynamic object and the regular object will refer to the
7460 same memory location for the variable. */
7462 htab
= elf_aarch64_hash_table (info
);
7464 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
7465 to copy the initial value out of the dynamic object and into the
7466 runtime process image. */
7467 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
7469 s
= htab
->root
.sdynrelro
;
7470 srel
= htab
->root
.sreldynrelro
;
7474 s
= htab
->root
.sdynbss
;
7475 srel
= htab
->root
.srelbss
;
7477 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
7479 srel
->size
+= RELOC_SIZE (htab
);
7483 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
7488 elfNN_aarch64_allocate_local_symbols (bfd
*abfd
, unsigned number
)
7490 struct elf_aarch64_local_symbol
*locals
;
7491 locals
= elf_aarch64_locals (abfd
);
7494 locals
= (struct elf_aarch64_local_symbol
*)
7495 bfd_zalloc (abfd
, number
* sizeof (struct elf_aarch64_local_symbol
));
7498 elf_aarch64_locals (abfd
) = locals
;
7503 /* Create the .got section to hold the global offset table. */
7506 aarch64_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
7508 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7511 struct elf_link_hash_entry
*h
;
7512 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7514 /* This function may be called more than once. */
7515 if (htab
->sgot
!= NULL
)
7518 flags
= bed
->dynamic_sec_flags
;
7520 s
= bfd_make_section_anyway_with_flags (abfd
,
7521 (bed
->rela_plts_and_copies_p
7522 ? ".rela.got" : ".rel.got"),
7523 (bed
->dynamic_sec_flags
7526 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
7530 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
7532 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
7535 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
7537 if (bed
->want_got_sym
)
7539 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
7540 (or .got.plt) section. We don't do this in the linker script
7541 because we don't want to define the symbol if we are not creating
7542 a global offset table. */
7543 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
7544 "_GLOBAL_OFFSET_TABLE_");
7545 elf_hash_table (info
)->hgot
= h
;
7550 if (bed
->want_got_plt
)
7552 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
7554 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
7559 /* The first bit of the global offset table is the header. */
7560 s
->size
+= bed
->got_header_size
;
7565 /* Look through the relocs for a section during the first phase. */
7568 elfNN_aarch64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
7569 asection
*sec
, const Elf_Internal_Rela
*relocs
)
7571 Elf_Internal_Shdr
*symtab_hdr
;
7572 struct elf_link_hash_entry
**sym_hashes
;
7573 const Elf_Internal_Rela
*rel
;
7574 const Elf_Internal_Rela
*rel_end
;
7577 struct elf_aarch64_link_hash_table
*htab
;
7579 if (bfd_link_relocatable (info
))
7582 BFD_ASSERT (is_aarch64_elf (abfd
));
7584 htab
= elf_aarch64_hash_table (info
);
7587 symtab_hdr
= &elf_symtab_hdr (abfd
);
7588 sym_hashes
= elf_sym_hashes (abfd
);
7590 rel_end
= relocs
+ sec
->reloc_count
;
7591 for (rel
= relocs
; rel
< rel_end
; rel
++)
7593 struct elf_link_hash_entry
*h
;
7594 unsigned int r_symndx
;
7595 unsigned int r_type
;
7596 bfd_reloc_code_real_type bfd_r_type
;
7597 Elf_Internal_Sym
*isym
;
7599 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
7600 r_type
= ELFNN_R_TYPE (rel
->r_info
);
7602 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
7604 /* xgettext:c-format */
7605 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd
, r_symndx
);
7609 if (r_symndx
< symtab_hdr
->sh_info
)
7611 /* A local symbol. */
7612 isym
= bfd_sym_from_r_symndx (&htab
->root
.sym_cache
,
7617 /* Check relocation against local STT_GNU_IFUNC symbol. */
7618 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
7620 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
,
7625 /* Fake a STT_GNU_IFUNC symbol. */
7626 h
->type
= STT_GNU_IFUNC
;
7629 h
->forced_local
= 1;
7630 h
->root
.type
= bfd_link_hash_defined
;
7637 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
7638 while (h
->root
.type
== bfd_link_hash_indirect
7639 || h
->root
.type
== bfd_link_hash_warning
)
7640 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7643 /* Could be done earlier, if h were already available. */
7644 bfd_r_type
= aarch64_tls_transition (abfd
, info
, r_type
, h
, r_symndx
);
7648 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
7649 This shows up in particular in an R_AARCH64_PREL64 in large model
7650 when calculating the pc-relative address to .got section which is
7651 used to initialize the gp register. */
7652 if (h
->root
.root
.string
7653 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
7655 if (htab
->root
.dynobj
== NULL
)
7656 htab
->root
.dynobj
= abfd
;
7658 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7661 BFD_ASSERT (h
== htab
->root
.hgot
);
7664 /* Create the ifunc sections for static executables. If we
7665 never see an indirect function symbol nor we are building
7666 a static executable, those sections will be empty and
7667 won't appear in output. */
7673 case BFD_RELOC_AARCH64_ADD_LO12
:
7674 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7675 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7676 case BFD_RELOC_AARCH64_CALL26
:
7677 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7678 case BFD_RELOC_AARCH64_JUMP26
:
7679 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7680 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7681 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7682 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7683 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7684 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7685 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7686 case BFD_RELOC_AARCH64_NN
:
7687 if (htab
->root
.dynobj
== NULL
)
7688 htab
->root
.dynobj
= abfd
;
7689 if (!_bfd_elf_create_ifunc_sections (htab
->root
.dynobj
, info
))
7694 /* It is referenced by a non-shared object. */
7700 case BFD_RELOC_AARCH64_16
:
7702 case BFD_RELOC_AARCH64_32
:
7704 if (bfd_link_pic (info
) && (sec
->flags
& SEC_ALLOC
) != 0)
7707 /* This is an absolute symbol. It represents a value instead
7709 && (bfd_is_abs_symbol (&h
->root
)
7710 /* This is an undefined symbol. */
7711 || h
->root
.type
== bfd_link_hash_undefined
))
7714 /* For local symbols, defined global symbols in a non-ABS section,
7715 it is assumed that the value is an address. */
7716 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7718 /* xgettext:c-format */
7719 (_("%pB: relocation %s against `%s' can not be used when making "
7721 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7722 (h
) ? h
->root
.root
.string
: "a local symbol");
7723 bfd_set_error (bfd_error_bad_value
);
7729 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
7730 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
7731 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
7732 case BFD_RELOC_AARCH64_MOVW_G3
:
7733 if (bfd_link_pic (info
))
7735 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7737 /* xgettext:c-format */
7738 (_("%pB: relocation %s against `%s' can not be used when making "
7739 "a shared object; recompile with -fPIC"),
7740 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7741 (h
) ? h
->root
.root
.string
: "a local symbol");
7742 bfd_set_error (bfd_error_bad_value
);
7747 case BFD_RELOC_AARCH64_16_PCREL
:
7748 case BFD_RELOC_AARCH64_32_PCREL
:
7749 case BFD_RELOC_AARCH64_64_PCREL
:
7750 case BFD_RELOC_AARCH64_ADD_LO12
:
7751 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
7752 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7753 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
7754 case BFD_RELOC_AARCH64_LDST128_LO12
:
7755 case BFD_RELOC_AARCH64_LDST16_LO12
:
7756 case BFD_RELOC_AARCH64_LDST32_LO12
:
7757 case BFD_RELOC_AARCH64_LDST64_LO12
:
7758 case BFD_RELOC_AARCH64_LDST8_LO12
:
7759 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
7760 if (h
== NULL
|| bfd_link_pic (info
))
7764 case BFD_RELOC_AARCH64_NN
:
7766 /* We don't need to handle relocs into sections not going into
7767 the "real" output. */
7768 if ((sec
->flags
& SEC_ALLOC
) == 0)
7773 if (!bfd_link_pic (info
))
7776 h
->plt
.refcount
+= 1;
7777 h
->pointer_equality_needed
= 1;
7780 /* No need to do anything if we're not creating a shared
7782 if (!(bfd_link_pic (info
)
7783 /* If on the other hand, we are creating an executable, we
7784 may need to keep relocations for symbols satisfied by a
7785 dynamic library if we manage to avoid copy relocs for the
7788 NOTE: Currently, there is no support of copy relocs
7789 elimination on pc-relative relocation types, because there is
7790 no dynamic relocation support for them in glibc. We still
7791 record the dynamic symbol reference for them. This is
7792 because one symbol may be referenced by both absolute
7793 relocation (for example, BFD_RELOC_AARCH64_NN) and
7794 pc-relative relocation. We need full symbol reference
7795 information to make correct decision later in
7796 elfNN_aarch64_adjust_dynamic_symbol. */
7797 || (ELIMINATE_COPY_RELOCS
7798 && !bfd_link_pic (info
)
7800 && (h
->root
.type
== bfd_link_hash_defweak
7801 || !h
->def_regular
))))
7805 struct elf_dyn_relocs
*p
;
7806 struct elf_dyn_relocs
**head
;
7807 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7809 /* We must copy these reloc types into the output file.
7810 Create a reloc section in dynobj and make room for
7814 if (htab
->root
.dynobj
== NULL
)
7815 htab
->root
.dynobj
= abfd
;
7817 sreloc
= _bfd_elf_make_dynamic_reloc_section
7818 (sec
, htab
->root
.dynobj
, LOG_FILE_ALIGN
, abfd
, /*rela? */ TRUE
);
7824 /* If this is a global symbol, we count the number of
7825 relocations we need for this symbol. */
7828 head
= &h
->dyn_relocs
;
7832 /* Track dynamic relocs needed for local syms too.
7833 We really need local syms available to do this
7839 isym
= bfd_sym_from_r_symndx (&htab
->root
.sym_cache
,
7844 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
7848 /* Beware of type punned pointers vs strict aliasing
7850 vpp
= &(elf_section_data (s
)->local_dynrel
);
7851 head
= (struct elf_dyn_relocs
**) vpp
;
7855 if (p
== NULL
|| p
->sec
!= sec
)
7857 size_t amt
= sizeof *p
;
7858 p
= ((struct elf_dyn_relocs
*)
7859 bfd_zalloc (htab
->root
.dynobj
, amt
));
7869 if (elfNN_aarch64_howto_table
[howto_index
].pc_relative
)
7874 /* RR: We probably want to keep a consistency check that
7875 there are no dangling GOT_PAGE relocs. */
7876 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7877 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7878 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7879 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7880 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7881 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7882 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7883 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7884 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7885 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
7886 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7887 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7888 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
7889 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
7890 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7891 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
7892 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
7893 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
7894 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
7895 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
7896 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
7897 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
7898 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
7899 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
7900 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
7901 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
7902 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
7903 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
7904 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
7905 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
7906 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
7909 unsigned old_got_type
;
7911 got_type
= aarch64_reloc_got_type (bfd_r_type
);
7915 h
->got
.refcount
+= 1;
7916 old_got_type
= elf_aarch64_hash_entry (h
)->got_type
;
7920 struct elf_aarch64_local_symbol
*locals
;
7922 if (!elfNN_aarch64_allocate_local_symbols
7923 (abfd
, symtab_hdr
->sh_info
))
7926 locals
= elf_aarch64_locals (abfd
);
7927 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7928 locals
[r_symndx
].got_refcount
+= 1;
7929 old_got_type
= locals
[r_symndx
].got_type
;
7932 /* If a variable is accessed with both general dynamic TLS
7933 methods, two slots may be created. */
7934 if (GOT_TLS_GD_ANY_P (old_got_type
) && GOT_TLS_GD_ANY_P (got_type
))
7935 got_type
|= old_got_type
;
7937 /* We will already have issued an error message if there
7938 is a TLS/non-TLS mismatch, based on the symbol type.
7939 So just combine any TLS types needed. */
7940 if (old_got_type
!= GOT_UNKNOWN
&& old_got_type
!= GOT_NORMAL
7941 && got_type
!= GOT_NORMAL
)
7942 got_type
|= old_got_type
;
7944 /* If the symbol is accessed by both IE and GD methods, we
7945 are able to relax. Turn off the GD flag, without
7946 messing up with any other kind of TLS types that may be
7948 if ((got_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (got_type
))
7949 got_type
&= ~ (GOT_TLSDESC_GD
| GOT_TLS_GD
);
7951 if (old_got_type
!= got_type
)
7954 elf_aarch64_hash_entry (h
)->got_type
= got_type
;
7957 struct elf_aarch64_local_symbol
*locals
;
7958 locals
= elf_aarch64_locals (abfd
);
7959 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7960 locals
[r_symndx
].got_type
= got_type
;
7964 if (htab
->root
.dynobj
== NULL
)
7965 htab
->root
.dynobj
= abfd
;
7966 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7971 case BFD_RELOC_AARCH64_BRANCH19
:
7972 case BFD_RELOC_AARCH64_TSTBR14
:
7973 case BFD_RELOC_AARCH64_CALL26
:
7974 case BFD_RELOC_AARCH64_JUMP26
:
7975 /* If this is a local symbol then we resolve it
7976 directly without creating a PLT entry. */
7981 if (h
->plt
.refcount
<= 0)
7982 h
->plt
.refcount
= 1;
7984 h
->plt
.refcount
+= 1;
7995 /* Treat mapping symbols as special target symbols. */
7998 elfNN_aarch64_is_target_special_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
8001 return bfd_is_aarch64_special_symbol_name (sym
->name
,
8002 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
);
8005 /* If the ELF symbol SYM might be a function in SEC, return the
8006 function size and set *CODE_OFF to the function's entry point,
8007 otherwise return zero. */
8009 static bfd_size_type
8010 elfNN_aarch64_maybe_function_sym (const asymbol
*sym
, asection
*sec
,
8015 if ((sym
->flags
& (BSF_SECTION_SYM
| BSF_FILE
| BSF_OBJECT
8016 | BSF_THREAD_LOCAL
| BSF_RELC
| BSF_SRELC
)) != 0
8017 || sym
->section
!= sec
)
8020 if (!(sym
->flags
& BSF_SYNTHETIC
))
8021 switch (ELF_ST_TYPE (((elf_symbol_type
*) sym
)->internal_elf_sym
.st_info
))
8030 if ((sym
->flags
& BSF_LOCAL
)
8031 && bfd_is_aarch64_special_symbol_name (sym
->name
,
8032 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
))
8035 *code_off
= sym
->value
;
8037 if (!(sym
->flags
& BSF_SYNTHETIC
))
8038 size
= ((elf_symbol_type
*) sym
)->internal_elf_sym
.st_size
;
8045 elfNN_aarch64_find_inliner_info (bfd
*abfd
,
8046 const char **filename_ptr
,
8047 const char **functionname_ptr
,
8048 unsigned int *line_ptr
)
8051 found
= _bfd_dwarf2_find_inliner_info
8052 (abfd
, filename_ptr
,
8053 functionname_ptr
, line_ptr
, &elf_tdata (abfd
)->dwarf2_find_line_info
);
8059 elfNN_aarch64_init_file_header (bfd
*abfd
, struct bfd_link_info
*link_info
)
8061 Elf_Internal_Ehdr
*i_ehdrp
; /* ELF file header, internal form. */
8063 if (!_bfd_elf_init_file_header (abfd
, link_info
))
8066 i_ehdrp
= elf_elfheader (abfd
);
8067 i_ehdrp
->e_ident
[EI_ABIVERSION
] = AARCH64_ELF_ABI_VERSION
;
8071 static enum elf_reloc_type_class
8072 elfNN_aarch64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
8073 const asection
*rel_sec ATTRIBUTE_UNUSED
,
8074 const Elf_Internal_Rela
*rela
)
8076 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
8078 if (htab
->root
.dynsym
!= NULL
8079 && htab
->root
.dynsym
->contents
!= NULL
)
8081 /* Check relocation against STT_GNU_IFUNC symbol if there are
8083 bfd
*abfd
= info
->output_bfd
;
8084 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8085 unsigned long r_symndx
= ELFNN_R_SYM (rela
->r_info
);
8086 if (r_symndx
!= STN_UNDEF
)
8088 Elf_Internal_Sym sym
;
8089 if (!bed
->s
->swap_symbol_in (abfd
,
8090 (htab
->root
.dynsym
->contents
8091 + r_symndx
* bed
->s
->sizeof_sym
),
8094 /* xgettext:c-format */
8095 _bfd_error_handler (_("%pB symbol number %lu references"
8096 " nonexistent SHT_SYMTAB_SHNDX section"),
8098 /* Ideally an error class should be returned here. */
8100 else if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
8101 return reloc_class_ifunc
;
8105 switch ((int) ELFNN_R_TYPE (rela
->r_info
))
8107 case AARCH64_R (IRELATIVE
):
8108 return reloc_class_ifunc
;
8109 case AARCH64_R (RELATIVE
):
8110 return reloc_class_relative
;
8111 case AARCH64_R (JUMP_SLOT
):
8112 return reloc_class_plt
;
8113 case AARCH64_R (COPY
):
8114 return reloc_class_copy
;
8116 return reloc_class_normal
;
8120 /* Handle an AArch64 specific section when reading an object file. This is
8121 called when bfd_section_from_shdr finds a section with an unknown
8125 elfNN_aarch64_section_from_shdr (bfd
*abfd
,
8126 Elf_Internal_Shdr
*hdr
,
8127 const char *name
, int shindex
)
8129 /* There ought to be a place to keep ELF backend specific flags, but
8130 at the moment there isn't one. We just keep track of the
8131 sections by their name, instead. Fortunately, the ABI gives
8132 names for all the AArch64 specific sections, so we will probably get
8134 switch (hdr
->sh_type
)
8136 case SHT_AARCH64_ATTRIBUTES
:
8143 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
8149 /* A structure used to record a list of sections, independently
8150 of the next and prev fields in the asection structure. */
8151 typedef struct section_list
8154 struct section_list
*next
;
8155 struct section_list
*prev
;
8159 /* Unfortunately we need to keep a list of sections for which
8160 an _aarch64_elf_section_data structure has been allocated. This
8161 is because it is possible for functions like elfNN_aarch64_write_section
8162 to be called on a section which has had an elf_data_structure
8163 allocated for it (and so the used_by_bfd field is valid) but
8164 for which the AArch64 extended version of this structure - the
8165 _aarch64_elf_section_data structure - has not been allocated. */
8166 static section_list
*sections_with_aarch64_elf_section_data
= NULL
;
8169 record_section_with_aarch64_elf_section_data (asection
*sec
)
8171 struct section_list
*entry
;
8173 entry
= bfd_malloc (sizeof (*entry
));
8177 entry
->next
= sections_with_aarch64_elf_section_data
;
8179 if (entry
->next
!= NULL
)
8180 entry
->next
->prev
= entry
;
8181 sections_with_aarch64_elf_section_data
= entry
;
8184 static struct section_list
*
8185 find_aarch64_elf_section_entry (asection
*sec
)
8187 struct section_list
*entry
;
8188 static struct section_list
*last_entry
= NULL
;
8190 /* This is a short cut for the typical case where the sections are added
8191 to the sections_with_aarch64_elf_section_data list in forward order and
8192 then looked up here in backwards order. This makes a real difference
8193 to the ld-srec/sec64k.exp linker test. */
8194 entry
= sections_with_aarch64_elf_section_data
;
8195 if (last_entry
!= NULL
)
8197 if (last_entry
->sec
== sec
)
8199 else if (last_entry
->next
!= NULL
&& last_entry
->next
->sec
== sec
)
8200 entry
= last_entry
->next
;
8203 for (; entry
; entry
= entry
->next
)
8204 if (entry
->sec
== sec
)
8208 /* Record the entry prior to this one - it is the entry we are
8209 most likely to want to locate next time. Also this way if we
8210 have been called from
8211 unrecord_section_with_aarch64_elf_section_data () we will not
8212 be caching a pointer that is about to be freed. */
8213 last_entry
= entry
->prev
;
8219 unrecord_section_with_aarch64_elf_section_data (asection
*sec
)
8221 struct section_list
*entry
;
8223 entry
= find_aarch64_elf_section_entry (sec
);
8227 if (entry
->prev
!= NULL
)
8228 entry
->prev
->next
= entry
->next
;
8229 if (entry
->next
!= NULL
)
8230 entry
->next
->prev
= entry
->prev
;
8231 if (entry
== sections_with_aarch64_elf_section_data
)
8232 sections_with_aarch64_elf_section_data
= entry
->next
;
8241 struct bfd_link_info
*info
;
8244 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
8245 asection
*, struct elf_link_hash_entry
*);
8246 } output_arch_syminfo
;
8248 enum map_symbol_type
8255 /* Output a single mapping symbol. */
8258 elfNN_aarch64_output_map_sym (output_arch_syminfo
*osi
,
8259 enum map_symbol_type type
, bfd_vma offset
)
8261 static const char *names
[2] = { "$x", "$d" };
8262 Elf_Internal_Sym sym
;
8264 sym
.st_value
= (osi
->sec
->output_section
->vma
8265 + osi
->sec
->output_offset
+ offset
);
8268 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
8269 sym
.st_shndx
= osi
->sec_shndx
;
8270 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
8273 /* Output a single local symbol for a generated stub. */
8276 elfNN_aarch64_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
8277 bfd_vma offset
, bfd_vma size
)
8279 Elf_Internal_Sym sym
;
8281 sym
.st_value
= (osi
->sec
->output_section
->vma
8282 + osi
->sec
->output_offset
+ offset
);
8285 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
8286 sym
.st_shndx
= osi
->sec_shndx
;
8287 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
8291 aarch64_map_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
8293 struct elf_aarch64_stub_hash_entry
*stub_entry
;
8297 output_arch_syminfo
*osi
;
8299 /* Massage our args to the form they really have. */
8300 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
8301 osi
= (output_arch_syminfo
*) in_arg
;
8303 stub_sec
= stub_entry
->stub_sec
;
8305 /* Ensure this stub is attached to the current section being
8307 if (stub_sec
!= osi
->sec
)
8310 addr
= (bfd_vma
) stub_entry
->stub_offset
;
8312 stub_name
= stub_entry
->output_name
;
8314 switch (stub_entry
->stub_type
)
8316 case aarch64_stub_adrp_branch
:
8317 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
8318 sizeof (aarch64_adrp_branch_stub
)))
8320 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8323 case aarch64_stub_long_branch
:
8324 if (!elfNN_aarch64_output_stub_sym
8325 (osi
, stub_name
, addr
, sizeof (aarch64_long_branch_stub
)))
8327 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8329 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_DATA
, addr
+ 16))
8332 case aarch64_stub_erratum_835769_veneer
:
8333 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
8334 sizeof (aarch64_erratum_835769_stub
)))
8336 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8339 case aarch64_stub_erratum_843419_veneer
:
8340 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
8341 sizeof (aarch64_erratum_843419_stub
)))
8343 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
8346 case aarch64_stub_none
:
8356 /* Output mapping symbols for linker generated sections. */
8359 elfNN_aarch64_output_arch_local_syms (bfd
*output_bfd
,
8360 struct bfd_link_info
*info
,
8362 int (*func
) (void *, const char *,
8365 struct elf_link_hash_entry
8368 output_arch_syminfo osi
;
8369 struct elf_aarch64_link_hash_table
*htab
;
8371 htab
= elf_aarch64_hash_table (info
);
8377 /* Long calls stubs. */
8378 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
8382 for (stub_sec
= htab
->stub_bfd
->sections
;
8383 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
8385 /* Ignore non-stub sections. */
8386 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
8391 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
8392 (output_bfd
, osi
.sec
->output_section
);
8394 /* The first instruction in a stub is always a branch. */
8395 if (!elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0))
8398 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_map_one_stub
,
8403 /* Finally, output mapping symbols for the PLT. */
8404 if (!htab
->root
.splt
|| htab
->root
.splt
->size
== 0)
8407 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
8408 (output_bfd
, htab
->root
.splt
->output_section
);
8409 osi
.sec
= htab
->root
.splt
;
8411 elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0);
8417 /* Allocate target specific section data. */
8420 elfNN_aarch64_new_section_hook (bfd
*abfd
, asection
*sec
)
8422 if (!sec
->used_by_bfd
)
8424 _aarch64_elf_section_data
*sdata
;
8425 size_t amt
= sizeof (*sdata
);
8427 sdata
= bfd_zalloc (abfd
, amt
);
8430 sec
->used_by_bfd
= sdata
;
8433 record_section_with_aarch64_elf_section_data (sec
);
8435 return _bfd_elf_new_section_hook (abfd
, sec
);
8440 unrecord_section_via_map_over_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
8442 void *ignore ATTRIBUTE_UNUSED
)
8444 unrecord_section_with_aarch64_elf_section_data (sec
);
8448 elfNN_aarch64_close_and_cleanup (bfd
*abfd
)
8451 bfd_map_over_sections (abfd
,
8452 unrecord_section_via_map_over_sections
, NULL
);
8454 return _bfd_elf_close_and_cleanup (abfd
);
8458 elfNN_aarch64_bfd_free_cached_info (bfd
*abfd
)
8461 bfd_map_over_sections (abfd
,
8462 unrecord_section_via_map_over_sections
, NULL
);
8464 return _bfd_free_cached_info (abfd
);
8467 /* Create dynamic sections. This is different from the ARM backend in that
8468 the got, plt, gotplt and their relocation sections are all created in the
8469 standard part of the bfd elf backend. */
8472 elfNN_aarch64_create_dynamic_sections (bfd
*dynobj
,
8473 struct bfd_link_info
*info
)
8475 /* We need to create .got section. */
8476 if (!aarch64_elf_create_got_section (dynobj
, info
))
8479 return _bfd_elf_create_dynamic_sections (dynobj
, info
);
8483 /* Allocate space in .plt, .got and associated reloc sections for
8487 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
8489 struct bfd_link_info
*info
;
8490 struct elf_aarch64_link_hash_table
*htab
;
8491 struct elf_aarch64_link_hash_entry
*eh
;
8492 struct elf_dyn_relocs
*p
;
8494 /* An example of a bfd_link_hash_indirect symbol is versioned
8495 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8496 -> __gxx_personality_v0(bfd_link_hash_defined)
8498 There is no need to process bfd_link_hash_indirect symbols here
8499 because we will also be presented with the concrete instance of
8500 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8501 called to copy all relevant data from the generic to the concrete
8503 if (h
->root
.type
== bfd_link_hash_indirect
)
8506 if (h
->root
.type
== bfd_link_hash_warning
)
8507 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8509 info
= (struct bfd_link_info
*) inf
;
8510 htab
= elf_aarch64_hash_table (info
);
8512 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8513 here if it is defined and referenced in a non-shared object. */
8514 if (h
->type
== STT_GNU_IFUNC
8517 else if (htab
->root
.dynamic_sections_created
&& h
->plt
.refcount
> 0)
8519 /* Make sure this symbol is output as a dynamic symbol.
8520 Undefined weak syms won't yet be marked as dynamic. */
8521 if (h
->dynindx
== -1 && !h
->forced_local
8522 && h
->root
.type
== bfd_link_hash_undefweak
)
8524 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8528 if (bfd_link_pic (info
) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
8530 asection
*s
= htab
->root
.splt
;
8532 /* If this is the first .plt entry, make room for the special
8535 s
->size
+= htab
->plt_header_size
;
8537 h
->plt
.offset
= s
->size
;
8539 /* If this symbol is not defined in a regular file, and we are
8540 not generating a shared library, then set the symbol to this
8541 location in the .plt. This is required to make function
8542 pointers compare as equal between the normal executable and
8543 the shared library. */
8544 if (!bfd_link_pic (info
) && !h
->def_regular
)
8546 h
->root
.u
.def
.section
= s
;
8547 h
->root
.u
.def
.value
= h
->plt
.offset
;
8550 /* Make room for this entry. For now we only create the
8551 small model PLT entries. We later need to find a way
8552 of relaxing into these from the large model PLT entries. */
8553 s
->size
+= htab
->plt_entry_size
;
8555 /* We also need to make an entry in the .got.plt section, which
8556 will be placed in the .got section by the linker script. */
8557 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
8559 /* We also need to make an entry in the .rela.plt section. */
8560 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8562 /* We need to ensure that all GOT entries that serve the PLT
8563 are consecutive with the special GOT slots [0] [1] and
8564 [2]. Any addtional relocations, such as
8565 R_AARCH64_TLSDESC, must be placed after the PLT related
8566 entries. We abuse the reloc_count such that during
8567 sizing we adjust reloc_count to indicate the number of
8568 PLT related reserved entries. In subsequent phases when
8569 filling in the contents of the reloc entries, PLT related
8570 entries are placed by computing their PLT index (0
8571 .. reloc_count). While other none PLT relocs are placed
8572 at the slot indicated by reloc_count and reloc_count is
8575 htab
->root
.srelplt
->reloc_count
++;
8577 /* Mark the DSO in case R_<CLS>_JUMP_SLOT relocs against
8578 variant PCS symbols are present. */
8579 if (h
->other
& STO_AARCH64_VARIANT_PCS
)
8580 htab
->variant_pcs
= 1;
8585 h
->plt
.offset
= (bfd_vma
) - 1;
8591 h
->plt
.offset
= (bfd_vma
) - 1;
8595 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8596 eh
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8598 if (h
->got
.refcount
> 0)
8601 unsigned got_type
= elf_aarch64_hash_entry (h
)->got_type
;
8603 h
->got
.offset
= (bfd_vma
) - 1;
8605 dyn
= htab
->root
.dynamic_sections_created
;
8607 /* Make sure this symbol is output as a dynamic symbol.
8608 Undefined weak syms won't yet be marked as dynamic. */
8609 if (dyn
&& h
->dynindx
== -1 && !h
->forced_local
8610 && h
->root
.type
== bfd_link_hash_undefweak
)
8612 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8616 if (got_type
== GOT_UNKNOWN
)
8619 else if (got_type
== GOT_NORMAL
)
8621 h
->got
.offset
= htab
->root
.sgot
->size
;
8622 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8623 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8624 || h
->root
.type
!= bfd_link_hash_undefweak
)
8625 && (bfd_link_pic (info
)
8626 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
))
8627 /* Undefined weak symbol in static PIE resolves to 0 without
8628 any dynamic relocations. */
8629 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
8631 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8637 if (got_type
& GOT_TLSDESC_GD
)
8639 eh
->tlsdesc_got_jump_table_offset
=
8640 (htab
->root
.sgotplt
->size
8641 - aarch64_compute_jump_table_size (htab
));
8642 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8643 h
->got
.offset
= (bfd_vma
) - 2;
8646 if (got_type
& GOT_TLS_GD
)
8648 h
->got
.offset
= htab
->root
.sgot
->size
;
8649 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8652 if (got_type
& GOT_TLS_IE
)
8654 h
->got
.offset
= htab
->root
.sgot
->size
;
8655 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8658 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
8659 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8660 || h
->root
.type
!= bfd_link_hash_undefweak
)
8661 && (!bfd_link_executable (info
)
8663 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
8665 if (got_type
& GOT_TLSDESC_GD
)
8667 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8668 /* Note reloc_count not incremented here! We have
8669 already adjusted reloc_count for this relocation
8672 /* TLSDESC PLT is now needed, but not yet determined. */
8673 htab
->root
.tlsdesc_plt
= (bfd_vma
) - 1;
8676 if (got_type
& GOT_TLS_GD
)
8677 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8679 if (got_type
& GOT_TLS_IE
)
8680 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8686 h
->got
.offset
= (bfd_vma
) - 1;
8689 if (h
->dyn_relocs
== NULL
)
8692 /* In the shared -Bsymbolic case, discard space allocated for
8693 dynamic pc-relative relocs against symbols which turn out to be
8694 defined in regular objects. For the normal shared case, discard
8695 space for pc-relative relocs that have become local due to symbol
8696 visibility changes. */
8698 if (bfd_link_pic (info
))
8700 /* Relocs that use pc_count are those that appear on a call
8701 insn, or certain REL relocs that can generated via assembly.
8702 We want calls to protected symbols to resolve directly to the
8703 function rather than going via the plt. If people want
8704 function pointer comparisons to work as expected then they
8705 should avoid writing weird assembly. */
8706 if (SYMBOL_CALLS_LOCAL (info
, h
))
8708 struct elf_dyn_relocs
**pp
;
8710 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
;)
8712 p
->count
-= p
->pc_count
;
8721 /* Also discard relocs on undefined weak syms with non-default
8723 if (h
->dyn_relocs
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
8725 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
8726 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
8727 h
->dyn_relocs
= NULL
;
8729 /* Make sure undefined weak symbols are output as a dynamic
8731 else if (h
->dynindx
== -1
8733 && h
->root
.type
== bfd_link_hash_undefweak
8734 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8739 else if (ELIMINATE_COPY_RELOCS
)
8741 /* For the non-shared case, discard space for relocs against
8742 symbols which turn out to need copy relocs or are not
8748 || (htab
->root
.dynamic_sections_created
8749 && (h
->root
.type
== bfd_link_hash_undefweak
8750 || h
->root
.type
== bfd_link_hash_undefined
))))
8752 /* Make sure this symbol is output as a dynamic symbol.
8753 Undefined weak syms won't yet be marked as dynamic. */
8754 if (h
->dynindx
== -1
8756 && h
->root
.type
== bfd_link_hash_undefweak
8757 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8760 /* If that succeeded, we know we'll be keeping all the
8762 if (h
->dynindx
!= -1)
8766 h
->dyn_relocs
= NULL
;
8771 /* Finally, allocate space. */
8772 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
8776 sreloc
= elf_section_data (p
->sec
)->sreloc
;
8778 BFD_ASSERT (sreloc
!= NULL
);
8780 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
8786 /* Allocate space in .plt, .got and associated reloc sections for
8787 ifunc dynamic relocs. */
8790 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
8793 struct bfd_link_info
*info
;
8794 struct elf_aarch64_link_hash_table
*htab
;
8796 /* An example of a bfd_link_hash_indirect symbol is versioned
8797 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8798 -> __gxx_personality_v0(bfd_link_hash_defined)
8800 There is no need to process bfd_link_hash_indirect symbols here
8801 because we will also be presented with the concrete instance of
8802 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8803 called to copy all relevant data from the generic to the concrete
8805 if (h
->root
.type
== bfd_link_hash_indirect
)
8808 if (h
->root
.type
== bfd_link_hash_warning
)
8809 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8811 info
= (struct bfd_link_info
*) inf
;
8812 htab
= elf_aarch64_hash_table (info
);
8814 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8815 here if it is defined and referenced in a non-shared object. */
8816 if (h
->type
== STT_GNU_IFUNC
8818 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
8820 htab
->plt_entry_size
,
8821 htab
->plt_header_size
,
8827 /* Allocate space in .plt, .got and associated reloc sections for
8828 local ifunc dynamic relocs. */
8831 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
8833 struct elf_link_hash_entry
*h
8834 = (struct elf_link_hash_entry
*) *slot
;
8836 if (h
->type
!= STT_GNU_IFUNC
8840 || h
->root
.type
!= bfd_link_hash_defined
)
8843 return elfNN_aarch64_allocate_ifunc_dynrelocs (h
, inf
);
8846 /* This is the most important function of all . Innocuosly named
8850 elfNN_aarch64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
8851 struct bfd_link_info
*info
)
8853 struct elf_aarch64_link_hash_table
*htab
;
8859 htab
= elf_aarch64_hash_table ((info
));
8860 dynobj
= htab
->root
.dynobj
;
8862 BFD_ASSERT (dynobj
!= NULL
);
8864 if (htab
->root
.dynamic_sections_created
)
8866 if (bfd_link_executable (info
) && !info
->nointerp
)
8868 s
= bfd_get_linker_section (dynobj
, ".interp");
8871 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
8872 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
8876 /* Set up .got offsets for local syms, and space for local dynamic
8878 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8880 struct elf_aarch64_local_symbol
*locals
= NULL
;
8881 Elf_Internal_Shdr
*symtab_hdr
;
8885 if (!is_aarch64_elf (ibfd
))
8888 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
8890 struct elf_dyn_relocs
*p
;
8892 for (p
= (struct elf_dyn_relocs
*)
8893 (elf_section_data (s
)->local_dynrel
); p
!= NULL
; p
= p
->next
)
8895 if (!bfd_is_abs_section (p
->sec
)
8896 && bfd_is_abs_section (p
->sec
->output_section
))
8898 /* Input section has been discarded, either because
8899 it is a copy of a linkonce section or due to
8900 linker script /DISCARD/, so we'll be discarding
8903 else if (p
->count
!= 0)
8905 srel
= elf_section_data (p
->sec
)->sreloc
;
8906 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
8907 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
8908 info
->flags
|= DF_TEXTREL
;
8913 locals
= elf_aarch64_locals (ibfd
);
8917 symtab_hdr
= &elf_symtab_hdr (ibfd
);
8918 srel
= htab
->root
.srelgot
;
8919 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
8921 locals
[i
].got_offset
= (bfd_vma
) - 1;
8922 locals
[i
].tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8923 if (locals
[i
].got_refcount
> 0)
8925 unsigned got_type
= locals
[i
].got_type
;
8926 if (got_type
& GOT_TLSDESC_GD
)
8928 locals
[i
].tlsdesc_got_jump_table_offset
=
8929 (htab
->root
.sgotplt
->size
8930 - aarch64_compute_jump_table_size (htab
));
8931 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8932 locals
[i
].got_offset
= (bfd_vma
) - 2;
8935 if (got_type
& GOT_TLS_GD
)
8937 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8938 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8941 if (got_type
& GOT_TLS_IE
8942 || got_type
& GOT_NORMAL
)
8944 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8945 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8948 if (got_type
== GOT_UNKNOWN
)
8952 if (bfd_link_pic (info
))
8954 if (got_type
& GOT_TLSDESC_GD
)
8956 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8957 /* Note RELOC_COUNT not incremented here! */
8958 htab
->root
.tlsdesc_plt
= (bfd_vma
) - 1;
8961 if (got_type
& GOT_TLS_GD
)
8962 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8964 if (got_type
& GOT_TLS_IE
8965 || got_type
& GOT_NORMAL
)
8966 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8971 locals
[i
].got_refcount
= (bfd_vma
) - 1;
8977 /* Allocate global sym .plt and .got entries, and space for global
8978 sym dynamic relocs. */
8979 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_dynrelocs
,
8982 /* Allocate global ifunc sym .plt and .got entries, and space for global
8983 ifunc sym dynamic relocs. */
8984 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_ifunc_dynrelocs
,
8987 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8988 htab_traverse (htab
->loc_hash_table
,
8989 elfNN_aarch64_allocate_local_ifunc_dynrelocs
,
8992 /* For every jump slot reserved in the sgotplt, reloc_count is
8993 incremented. However, when we reserve space for TLS descriptors,
8994 it's not incremented, so in order to compute the space reserved
8995 for them, it suffices to multiply the reloc count by the jump
8998 if (htab
->root
.srelplt
)
8999 htab
->sgotplt_jump_table_size
= aarch64_compute_jump_table_size (htab
);
9001 if (htab
->root
.tlsdesc_plt
)
9003 if (htab
->root
.splt
->size
== 0)
9004 htab
->root
.splt
->size
+= htab
->plt_header_size
;
9006 /* If we're not using lazy TLS relocations, don't generate the
9007 GOT and PLT entry required. */
9008 if ((info
->flags
& DF_BIND_NOW
))
9009 htab
->root
.tlsdesc_plt
= 0;
9012 htab
->root
.tlsdesc_plt
= htab
->root
.splt
->size
;
9013 htab
->root
.splt
->size
+= htab
->tlsdesc_plt_entry_size
;
9015 htab
->root
.tlsdesc_got
= htab
->root
.sgot
->size
;
9016 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
9020 /* Init mapping symbols information to use later to distingush between
9021 code and data while scanning for errata. */
9022 if (htab
->fix_erratum_835769
|| htab
->fix_erratum_843419
)
9023 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
9025 if (!is_aarch64_elf (ibfd
))
9027 bfd_elfNN_aarch64_init_maps (ibfd
);
9030 /* We now have determined the sizes of the various dynamic sections.
9031 Allocate memory for them. */
9033 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
9035 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
9038 if (s
== htab
->root
.splt
9039 || s
== htab
->root
.sgot
9040 || s
== htab
->root
.sgotplt
9041 || s
== htab
->root
.iplt
9042 || s
== htab
->root
.igotplt
9043 || s
== htab
->root
.sdynbss
9044 || s
== htab
->root
.sdynrelro
)
9046 /* Strip this section if we don't need it; see the
9049 else if (CONST_STRNEQ (bfd_section_name (s
), ".rela"))
9051 if (s
->size
!= 0 && s
!= htab
->root
.srelplt
)
9054 /* We use the reloc_count field as a counter if we need
9055 to copy relocs into the output file. */
9056 if (s
!= htab
->root
.srelplt
)
9061 /* It's not one of our sections, so don't allocate space. */
9067 /* If we don't need this section, strip it from the
9068 output file. This is mostly to handle .rela.bss and
9069 .rela.plt. We must create both sections in
9070 create_dynamic_sections, because they must be created
9071 before the linker maps input sections to output
9072 sections. The linker does that before
9073 adjust_dynamic_symbol is called, and it is that
9074 function which decides whether anything needs to go
9075 into these sections. */
9076 s
->flags
|= SEC_EXCLUDE
;
9080 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
9083 /* Allocate memory for the section contents. We use bfd_zalloc
9084 here in case unused entries are not reclaimed before the
9085 section's contents are written out. This should not happen,
9086 but this way if it does, we get a R_AARCH64_NONE reloc instead
9088 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
9089 if (s
->contents
== NULL
)
9093 if (htab
->root
.dynamic_sections_created
)
9095 /* Add some entries to the .dynamic section. We fill in the
9096 values later, in elfNN_aarch64_finish_dynamic_sections, but we
9097 must add the entries now so that we get the correct size for
9098 the .dynamic section. The DT_DEBUG entry is filled in by the
9099 dynamic linker and used by the debugger. */
9100 #define add_dynamic_entry(TAG, VAL) \
9101 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9103 if (!_bfd_elf_add_dynamic_tags (output_bfd
, info
, relocs
))
9106 if (htab
->root
.splt
->size
!= 0)
9108 if (htab
->variant_pcs
9109 && !add_dynamic_entry (DT_AARCH64_VARIANT_PCS
, 0))
9112 if ((elf_aarch64_tdata (output_bfd
)->plt_type
== PLT_BTI_PAC
)
9113 && (!add_dynamic_entry (DT_AARCH64_BTI_PLT
, 0)
9114 || !add_dynamic_entry (DT_AARCH64_PAC_PLT
, 0)))
9117 else if ((elf_aarch64_tdata (output_bfd
)->plt_type
== PLT_BTI
)
9118 && !add_dynamic_entry (DT_AARCH64_BTI_PLT
, 0))
9121 else if ((elf_aarch64_tdata (output_bfd
)->plt_type
== PLT_PAC
)
9122 && !add_dynamic_entry (DT_AARCH64_PAC_PLT
, 0))
9126 #undef add_dynamic_entry
9132 elf_aarch64_update_plt_entry (bfd
*output_bfd
,
9133 bfd_reloc_code_real_type r_type
,
9134 bfd_byte
*plt_entry
, bfd_vma value
)
9136 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (r_type
);
9138 /* FIXME: We should check the return value from this function call. */
9139 (void) _bfd_aarch64_elf_put_addend (output_bfd
, plt_entry
, r_type
, howto
, value
);
9143 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry
*h
,
9144 struct elf_aarch64_link_hash_table
9145 *htab
, bfd
*output_bfd
,
9146 struct bfd_link_info
*info
)
9148 bfd_byte
*plt_entry
;
9151 bfd_vma gotplt_entry_address
;
9152 bfd_vma plt_entry_address
;
9153 Elf_Internal_Rela rela
;
9155 asection
*plt
, *gotplt
, *relplt
;
9157 /* When building a static executable, use .iplt, .igot.plt and
9158 .rela.iplt sections for STT_GNU_IFUNC symbols. */
9159 if (htab
->root
.splt
!= NULL
)
9161 plt
= htab
->root
.splt
;
9162 gotplt
= htab
->root
.sgotplt
;
9163 relplt
= htab
->root
.srelplt
;
9167 plt
= htab
->root
.iplt
;
9168 gotplt
= htab
->root
.igotplt
;
9169 relplt
= htab
->root
.irelplt
;
9172 /* Get the index in the procedure linkage table which
9173 corresponds to this symbol. This is the index of this symbol
9174 in all the symbols for which we are making plt entries. The
9175 first entry in the procedure linkage table is reserved.
9177 Get the offset into the .got table of the entry that
9178 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
9179 bytes. The first three are reserved for the dynamic linker.
9181 For static executables, we don't reserve anything. */
9183 if (plt
== htab
->root
.splt
)
9185 plt_index
= (h
->plt
.offset
- htab
->plt_header_size
) / htab
->plt_entry_size
;
9186 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
9190 plt_index
= h
->plt
.offset
/ htab
->plt_entry_size
;
9191 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
9194 plt_entry
= plt
->contents
+ h
->plt
.offset
;
9195 plt_entry_address
= plt
->output_section
->vma
9196 + plt
->output_offset
+ h
->plt
.offset
;
9197 gotplt_entry_address
= gotplt
->output_section
->vma
+
9198 gotplt
->output_offset
+ got_offset
;
9200 /* Copy in the boiler-plate for the PLTn entry. */
9201 memcpy (plt_entry
, htab
->plt_entry
, htab
->plt_entry_size
);
9203 /* First instruction in BTI enabled PLT stub is a BTI
9204 instruction so skip it. */
9205 if (elf_aarch64_tdata (output_bfd
)->plt_type
& PLT_BTI
9206 && elf_elfheader (output_bfd
)->e_type
== ET_EXEC
)
9207 plt_entry
= plt_entry
+ 4;
9209 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9210 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9211 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9213 PG (gotplt_entry_address
) -
9214 PG (plt_entry_address
));
9216 /* Fill in the lo12 bits for the load from the pltgot. */
9217 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
9219 PG_OFFSET (gotplt_entry_address
));
9221 /* Fill in the lo12 bits for the add from the pltgot entry. */
9222 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
9224 PG_OFFSET (gotplt_entry_address
));
9226 /* All the GOTPLT Entries are essentially initialized to PLT0. */
9227 bfd_put_NN (output_bfd
,
9228 plt
->output_section
->vma
+ plt
->output_offset
,
9229 gotplt
->contents
+ got_offset
);
9231 rela
.r_offset
= gotplt_entry_address
;
9233 if (h
->dynindx
== -1
9234 || ((bfd_link_executable (info
)
9235 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
9237 && h
->type
== STT_GNU_IFUNC
))
9239 /* If an STT_GNU_IFUNC symbol is locally defined, generate
9240 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
9241 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
9242 rela
.r_addend
= (h
->root
.u
.def
.value
9243 + h
->root
.u
.def
.section
->output_section
->vma
9244 + h
->root
.u
.def
.section
->output_offset
);
9248 /* Fill in the entry in the .rela.plt section. */
9249 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (JUMP_SLOT
));
9253 /* Compute the relocation entry to used based on PLT index and do
9254 not adjust reloc_count. The reloc_count has already been adjusted
9255 to account for this entry. */
9256 loc
= relplt
->contents
+ plt_index
* RELOC_SIZE (htab
);
9257 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9260 /* Size sections even though they're not dynamic. We use it to setup
9261 _TLS_MODULE_BASE_, if needed. */
9264 elfNN_aarch64_always_size_sections (bfd
*output_bfd
,
9265 struct bfd_link_info
*info
)
9269 if (bfd_link_relocatable (info
))
9272 tls_sec
= elf_hash_table (info
)->tls_sec
;
9276 struct elf_link_hash_entry
*tlsbase
;
9278 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
9279 "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
9283 struct bfd_link_hash_entry
*h
= NULL
;
9284 const struct elf_backend_data
*bed
=
9285 get_elf_backend_data (output_bfd
);
9287 if (!(_bfd_generic_link_add_one_symbol
9288 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
9289 tls_sec
, 0, NULL
, FALSE
, bed
->collect
, &h
)))
9292 tlsbase
->type
= STT_TLS
;
9293 tlsbase
= (struct elf_link_hash_entry
*) h
;
9294 tlsbase
->def_regular
= 1;
9295 tlsbase
->other
= STV_HIDDEN
;
9296 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
9303 /* Finish up dynamic symbol handling. We set the contents of various
9304 dynamic sections here. */
9307 elfNN_aarch64_finish_dynamic_symbol (bfd
*output_bfd
,
9308 struct bfd_link_info
*info
,
9309 struct elf_link_hash_entry
*h
,
9310 Elf_Internal_Sym
*sym
)
9312 struct elf_aarch64_link_hash_table
*htab
;
9313 htab
= elf_aarch64_hash_table (info
);
9315 if (h
->plt
.offset
!= (bfd_vma
) - 1)
9317 asection
*plt
, *gotplt
, *relplt
;
9319 /* This symbol has an entry in the procedure linkage table. Set
9322 /* When building a static executable, use .iplt, .igot.plt and
9323 .rela.iplt sections for STT_GNU_IFUNC symbols. */
9324 if (htab
->root
.splt
!= NULL
)
9326 plt
= htab
->root
.splt
;
9327 gotplt
= htab
->root
.sgotplt
;
9328 relplt
= htab
->root
.srelplt
;
9332 plt
= htab
->root
.iplt
;
9333 gotplt
= htab
->root
.igotplt
;
9334 relplt
= htab
->root
.irelplt
;
9337 /* This symbol has an entry in the procedure linkage table. Set
9339 if ((h
->dynindx
== -1
9340 && !((h
->forced_local
|| bfd_link_executable (info
))
9342 && h
->type
== STT_GNU_IFUNC
))
9348 elfNN_aarch64_create_small_pltn_entry (h
, htab
, output_bfd
, info
);
9349 if (!h
->def_regular
)
9351 /* Mark the symbol as undefined, rather than as defined in
9352 the .plt section. */
9353 sym
->st_shndx
= SHN_UNDEF
;
9354 /* If the symbol is weak we need to clear the value.
9355 Otherwise, the PLT entry would provide a definition for
9356 the symbol even if the symbol wasn't defined anywhere,
9357 and so the symbol would never be NULL. Leave the value if
9358 there were any relocations where pointer equality matters
9359 (this is a clue for the dynamic linker, to make function
9360 pointer comparisons work between an application and shared
9362 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
9367 if (h
->got
.offset
!= (bfd_vma
) - 1
9368 && elf_aarch64_hash_entry (h
)->got_type
== GOT_NORMAL
9369 /* Undefined weak symbol in static PIE resolves to 0 without
9370 any dynamic relocations. */
9371 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
9373 Elf_Internal_Rela rela
;
9376 /* This symbol has an entry in the global offset table. Set it
9378 if (htab
->root
.sgot
== NULL
|| htab
->root
.srelgot
== NULL
)
9381 rela
.r_offset
= (htab
->root
.sgot
->output_section
->vma
9382 + htab
->root
.sgot
->output_offset
9383 + (h
->got
.offset
& ~(bfd_vma
) 1));
9386 && h
->type
== STT_GNU_IFUNC
)
9388 if (bfd_link_pic (info
))
9390 /* Generate R_AARCH64_GLOB_DAT. */
9397 if (!h
->pointer_equality_needed
)
9400 /* For non-shared object, we can't use .got.plt, which
9401 contains the real function address if we need pointer
9402 equality. We load the GOT entry with the PLT entry. */
9403 plt
= htab
->root
.splt
? htab
->root
.splt
: htab
->root
.iplt
;
9404 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
9405 + plt
->output_offset
9407 htab
->root
.sgot
->contents
9408 + (h
->got
.offset
& ~(bfd_vma
) 1));
9412 else if (bfd_link_pic (info
) && SYMBOL_REFERENCES_LOCAL (info
, h
))
9414 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
9417 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
9418 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
9419 rela
.r_addend
= (h
->root
.u
.def
.value
9420 + h
->root
.u
.def
.section
->output_section
->vma
9421 + h
->root
.u
.def
.section
->output_offset
);
9426 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
9427 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9428 htab
->root
.sgot
->contents
+ h
->got
.offset
);
9429 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (GLOB_DAT
));
9433 loc
= htab
->root
.srelgot
->contents
;
9434 loc
+= htab
->root
.srelgot
->reloc_count
++ * RELOC_SIZE (htab
);
9435 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9440 Elf_Internal_Rela rela
;
9444 /* This symbol needs a copy reloc. Set it up. */
9445 if (h
->dynindx
== -1
9446 || (h
->root
.type
!= bfd_link_hash_defined
9447 && h
->root
.type
!= bfd_link_hash_defweak
)
9448 || htab
->root
.srelbss
== NULL
)
9451 rela
.r_offset
= (h
->root
.u
.def
.value
9452 + h
->root
.u
.def
.section
->output_section
->vma
9453 + h
->root
.u
.def
.section
->output_offset
);
9454 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (COPY
));
9456 if (h
->root
.u
.def
.section
== htab
->root
.sdynrelro
)
9457 s
= htab
->root
.sreldynrelro
;
9459 s
= htab
->root
.srelbss
;
9460 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
9461 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9464 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
9465 be NULL for local symbols. */
9467 && (h
== elf_hash_table (info
)->hdynamic
9468 || h
== elf_hash_table (info
)->hgot
))
9469 sym
->st_shndx
= SHN_ABS
;
9474 /* Finish up local dynamic symbol handling. We set the contents of
9475 various dynamic sections here. */
9478 elfNN_aarch64_finish_local_dynamic_symbol (void **slot
, void *inf
)
9480 struct elf_link_hash_entry
*h
9481 = (struct elf_link_hash_entry
*) *slot
;
9482 struct bfd_link_info
*info
9483 = (struct bfd_link_info
*) inf
;
9485 return elfNN_aarch64_finish_dynamic_symbol (info
->output_bfd
,
9490 elfNN_aarch64_init_small_plt0_entry (bfd
*output_bfd ATTRIBUTE_UNUSED
,
9491 struct elf_aarch64_link_hash_table
9494 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
9495 small and large plts and at the minute just generates
9498 /* PLT0 of the small PLT looks like this in ELF64 -
9499 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
9500 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
9501 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
9503 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
9504 // GOTPLT entry for this.
9506 PLT0 will be slightly different in ELF32 due to different got entry
9508 bfd_vma plt_got_2nd_ent
; /* Address of GOT[2]. */
9512 memcpy (htab
->root
.splt
->contents
, htab
->plt0_entry
,
9513 htab
->plt_header_size
);
9515 /* PR 26312: Explicitly set the sh_entsize to 0 so that
9516 consumers do not think that the section contains fixed
9518 elf_section_data (htab
->root
.splt
->output_section
)->this_hdr
.sh_entsize
= 0;
9520 plt_got_2nd_ent
= (htab
->root
.sgotplt
->output_section
->vma
9521 + htab
->root
.sgotplt
->output_offset
9522 + GOT_ENTRY_SIZE
* 2);
9524 plt_base
= htab
->root
.splt
->output_section
->vma
+
9525 htab
->root
.splt
->output_offset
;
9527 /* First instruction in BTI enabled PLT stub is a BTI
9528 instruction so skip it. */
9529 bfd_byte
*plt0_entry
= htab
->root
.splt
->contents
;
9530 if (elf_aarch64_tdata (output_bfd
)->plt_type
& PLT_BTI
)
9531 plt0_entry
= plt0_entry
+ 4;
9533 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9534 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9535 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9537 PG (plt_got_2nd_ent
) - PG (plt_base
+ 4));
9539 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
9541 PG_OFFSET (plt_got_2nd_ent
));
9543 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
9545 PG_OFFSET (plt_got_2nd_ent
));
9549 elfNN_aarch64_finish_dynamic_sections (bfd
*output_bfd
,
9550 struct bfd_link_info
*info
)
9552 struct elf_aarch64_link_hash_table
*htab
;
9556 htab
= elf_aarch64_hash_table (info
);
9557 dynobj
= htab
->root
.dynobj
;
9558 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
9560 if (htab
->root
.dynamic_sections_created
)
9562 ElfNN_External_Dyn
*dyncon
, *dynconend
;
9564 if (sdyn
== NULL
|| htab
->root
.sgot
== NULL
)
9567 dyncon
= (ElfNN_External_Dyn
*) sdyn
->contents
;
9568 dynconend
= (ElfNN_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
9569 for (; dyncon
< dynconend
; dyncon
++)
9571 Elf_Internal_Dyn dyn
;
9574 bfd_elfNN_swap_dyn_in (dynobj
, dyncon
, &dyn
);
9582 s
= htab
->root
.sgotplt
;
9583 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9587 s
= htab
->root
.srelplt
;
9588 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9592 s
= htab
->root
.srelplt
;
9593 dyn
.d_un
.d_val
= s
->size
;
9596 case DT_TLSDESC_PLT
:
9597 s
= htab
->root
.splt
;
9598 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9599 + htab
->root
.tlsdesc_plt
;
9602 case DT_TLSDESC_GOT
:
9603 s
= htab
->root
.sgot
;
9604 BFD_ASSERT (htab
->root
.tlsdesc_got
!= (bfd_vma
)-1);
9605 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9606 + htab
->root
.tlsdesc_got
;
9610 bfd_elfNN_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
9615 /* Fill in the special first entry in the procedure linkage table. */
9616 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
9618 elfNN_aarch64_init_small_plt0_entry (output_bfd
, htab
);
9620 if (htab
->root
.tlsdesc_plt
&& !(info
->flags
& DF_BIND_NOW
))
9622 BFD_ASSERT (htab
->root
.tlsdesc_got
!= (bfd_vma
)-1);
9623 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9624 htab
->root
.sgot
->contents
+ htab
->root
.tlsdesc_got
);
9626 const bfd_byte
*entry
= elfNN_aarch64_tlsdesc_small_plt_entry
;
9627 htab
->tlsdesc_plt_entry_size
= PLT_TLSDESC_ENTRY_SIZE
;
9629 aarch64_plt_type type
= elf_aarch64_tdata (output_bfd
)->plt_type
;
9630 if (type
== PLT_BTI
|| type
== PLT_BTI_PAC
)
9632 entry
= elfNN_aarch64_tlsdesc_small_plt_bti_entry
;
9635 memcpy (htab
->root
.splt
->contents
+ htab
->root
.tlsdesc_plt
,
9636 entry
, htab
->tlsdesc_plt_entry_size
);
9639 bfd_vma adrp1_addr
=
9640 htab
->root
.splt
->output_section
->vma
9641 + htab
->root
.splt
->output_offset
9642 + htab
->root
.tlsdesc_plt
+ 4;
9644 bfd_vma adrp2_addr
= adrp1_addr
+ 4;
9647 htab
->root
.sgot
->output_section
->vma
9648 + htab
->root
.sgot
->output_offset
;
9650 bfd_vma pltgot_addr
=
9651 htab
->root
.sgotplt
->output_section
->vma
9652 + htab
->root
.sgotplt
->output_offset
;
9654 bfd_vma dt_tlsdesc_got
= got_addr
+ htab
->root
.tlsdesc_got
;
9656 bfd_byte
*plt_entry
=
9657 htab
->root
.splt
->contents
+ htab
->root
.tlsdesc_plt
;
9659 /* First instruction in BTI enabled PLT stub is a BTI
9660 instruction so skip it. */
9663 plt_entry
= plt_entry
+ 4;
9664 adrp1_addr
= adrp1_addr
+ 4;
9665 adrp2_addr
= adrp2_addr
+ 4;
9668 /* adrp x2, DT_TLSDESC_GOT */
9669 elf_aarch64_update_plt_entry (output_bfd
,
9670 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9672 (PG (dt_tlsdesc_got
)
9673 - PG (adrp1_addr
)));
9676 elf_aarch64_update_plt_entry (output_bfd
,
9677 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9680 - PG (adrp2_addr
)));
9682 /* ldr x2, [x2, #0] */
9683 elf_aarch64_update_plt_entry (output_bfd
,
9684 BFD_RELOC_AARCH64_LDSTNN_LO12
,
9686 PG_OFFSET (dt_tlsdesc_got
));
9689 elf_aarch64_update_plt_entry (output_bfd
,
9690 BFD_RELOC_AARCH64_ADD_LO12
,
9692 PG_OFFSET (pltgot_addr
));
9697 if (htab
->root
.sgotplt
)
9699 if (bfd_is_abs_section (htab
->root
.sgotplt
->output_section
))
9702 (_("discarded output section: `%pA'"), htab
->root
.sgotplt
);
9706 /* Fill in the first three entries in the global offset table. */
9707 if (htab
->root
.sgotplt
->size
> 0)
9709 bfd_put_NN (output_bfd
, (bfd_vma
) 0, htab
->root
.sgotplt
->contents
);
9711 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
9712 bfd_put_NN (output_bfd
,
9714 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
9715 bfd_put_NN (output_bfd
,
9717 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
* 2);
9720 if (htab
->root
.sgot
)
9722 if (htab
->root
.sgot
->size
> 0)
9725 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0;
9726 bfd_put_NN (output_bfd
, addr
, htab
->root
.sgot
->contents
);
9730 elf_section_data (htab
->root
.sgotplt
->output_section
)->
9731 this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
9734 if (htab
->root
.sgot
&& htab
->root
.sgot
->size
> 0)
9735 elf_section_data (htab
->root
.sgot
->output_section
)->this_hdr
.sh_entsize
9738 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
9739 htab_traverse (htab
->loc_hash_table
,
9740 elfNN_aarch64_finish_local_dynamic_symbol
,
9746 /* Check if BTI enabled PLTs are needed. Returns the type needed. */
9747 static aarch64_plt_type
9748 get_plt_type (bfd
*abfd
)
9750 aarch64_plt_type ret
= PLT_NORMAL
;
9751 bfd_byte
*contents
, *extdyn
, *extdynend
;
9752 asection
*sec
= bfd_get_section_by_name (abfd
, ".dynamic");
9753 if (!sec
|| !bfd_malloc_and_get_section (abfd
, sec
, &contents
))
9756 extdynend
= contents
+ sec
->size
;
9757 for (; extdyn
< extdynend
; extdyn
+= sizeof (ElfNN_External_Dyn
))
9759 Elf_Internal_Dyn dyn
;
9760 bfd_elfNN_swap_dyn_in (abfd
, extdyn
, &dyn
);
9762 /* Let's check the processor specific dynamic array tags. */
9763 bfd_vma tag
= dyn
.d_tag
;
9764 if (tag
< DT_LOPROC
|| tag
> DT_HIPROC
)
9769 case DT_AARCH64_BTI_PLT
:
9773 case DT_AARCH64_PAC_PLT
:
9785 elfNN_aarch64_get_synthetic_symtab (bfd
*abfd
,
9792 elf_aarch64_tdata (abfd
)->plt_type
= get_plt_type (abfd
);
9793 return _bfd_elf_get_synthetic_symtab (abfd
, symcount
, syms
,
9794 dynsymcount
, dynsyms
, ret
);
9797 /* Return address for Ith PLT stub in section PLT, for relocation REL
9798 or (bfd_vma) -1 if it should not be included. */
9801 elfNN_aarch64_plt_sym_val (bfd_vma i
, const asection
*plt
,
9802 const arelent
*rel ATTRIBUTE_UNUSED
)
9804 size_t plt0_size
= PLT_ENTRY_SIZE
;
9805 size_t pltn_size
= PLT_SMALL_ENTRY_SIZE
;
9807 if (elf_aarch64_tdata (plt
->owner
)->plt_type
== PLT_BTI_PAC
)
9809 if (elf_elfheader (plt
->owner
)->e_type
== ET_EXEC
)
9810 pltn_size
= PLT_BTI_PAC_SMALL_ENTRY_SIZE
;
9812 pltn_size
= PLT_PAC_SMALL_ENTRY_SIZE
;
9814 else if (elf_aarch64_tdata (plt
->owner
)->plt_type
== PLT_BTI
)
9816 if (elf_elfheader (plt
->owner
)->e_type
== ET_EXEC
)
9817 pltn_size
= PLT_BTI_SMALL_ENTRY_SIZE
;
9819 else if (elf_aarch64_tdata (plt
->owner
)->plt_type
== PLT_PAC
)
9821 pltn_size
= PLT_PAC_SMALL_ENTRY_SIZE
;
9824 return plt
->vma
+ plt0_size
+ i
* pltn_size
;
9827 /* Returns TRUE if NAME is an AArch64 mapping symbol.
9828 The ARM ELF standard defines $x (for A64 code) and $d (for data).
9829 It also allows a period initiated suffix to be added to the symbol, ie:
9830 "$[adtx]\.[:sym_char]+". */
9833 is_aarch64_mapping_symbol (const char * name
)
9835 return name
!= NULL
/* Paranoia. */
9836 && name
[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
9837 the mapping symbols could have acquired a prefix.
9838 We do not support this here, since such symbols no
9839 longer conform to the ARM ELF ABI. */
9840 && (name
[1] == 'd' || name
[1] == 'x')
9841 && (name
[2] == 0 || name
[2] == '.');
9842 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
9843 any characters that follow the period are legal characters for the body
9844 of a symbol's name. For now we just assume that this is the case. */
9847 /* Make sure that mapping symbols in object files are not removed via the
9848 "strip --strip-unneeded" tool. These symbols might needed in order to
9849 correctly generate linked files. Once an object file has been linked,
9850 it should be safe to remove them. */
9853 elfNN_aarch64_backend_symbol_processing (bfd
*abfd
, asymbol
*sym
)
9855 if (((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0)
9856 && sym
->section
!= bfd_abs_section_ptr
9857 && is_aarch64_mapping_symbol (sym
->name
))
9858 sym
->flags
|= BSF_KEEP
;
9861 /* Implement elf_backend_setup_gnu_properties for AArch64. It serves as a
9862 wrapper function for _bfd_aarch64_elf_link_setup_gnu_properties to account
9863 for the effect of GNU properties of the output_bfd. */
9865 elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info
*info
)
9867 uint32_t prop
= elf_aarch64_tdata (info
->output_bfd
)->gnu_and_prop
;
9868 bfd
*pbfd
= _bfd_aarch64_elf_link_setup_gnu_properties (info
, &prop
);
9869 elf_aarch64_tdata (info
->output_bfd
)->gnu_and_prop
= prop
;
9870 elf_aarch64_tdata (info
->output_bfd
)->plt_type
9871 |= (prop
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
) ? PLT_BTI
: 0;
9872 setup_plt_values (info
, elf_aarch64_tdata (info
->output_bfd
)->plt_type
);
9876 /* Implement elf_backend_merge_gnu_properties for AArch64. It serves as a
9877 wrapper function for _bfd_aarch64_elf_merge_gnu_properties to account
9878 for the effect of GNU properties of the output_bfd. */
9880 elfNN_aarch64_merge_gnu_properties (struct bfd_link_info
*info
,
9881 bfd
*abfd
, bfd
*bbfd
,
9882 elf_property
*aprop
,
9883 elf_property
*bprop
)
9886 = elf_aarch64_tdata (info
->output_bfd
)->gnu_and_prop
;
9888 /* If output has been marked with BTI using command line argument, give out
9889 warning if necessary. */
9890 /* Properties are merged per type, hence only check for warnings when merging
9891 GNU_PROPERTY_AARCH64_FEATURE_1_AND. */
9892 if (((aprop
&& aprop
->pr_type
== GNU_PROPERTY_AARCH64_FEATURE_1_AND
)
9893 || (bprop
&& bprop
->pr_type
== GNU_PROPERTY_AARCH64_FEATURE_1_AND
))
9894 && (prop
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
)
9895 && (!elf_aarch64_tdata (info
->output_bfd
)->no_bti_warn
))
9897 if ((aprop
&& !(aprop
->u
.number
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
))
9900 _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
9901 "all inputs do not have BTI in NOTE section."),
9904 if ((bprop
&& !(bprop
->u
.number
& GNU_PROPERTY_AARCH64_FEATURE_1_BTI
))
9907 _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
9908 "all inputs do not have BTI in NOTE section."),
9913 return _bfd_aarch64_elf_merge_gnu_properties (info
, abfd
, aprop
,
9917 /* We use this so we can override certain functions
9918 (though currently we don't). */
9920 const struct elf_size_info elfNN_aarch64_size_info
=
9922 sizeof (ElfNN_External_Ehdr
),
9923 sizeof (ElfNN_External_Phdr
),
9924 sizeof (ElfNN_External_Shdr
),
9925 sizeof (ElfNN_External_Rel
),
9926 sizeof (ElfNN_External_Rela
),
9927 sizeof (ElfNN_External_Sym
),
9928 sizeof (ElfNN_External_Dyn
),
9929 sizeof (Elf_External_Note
),
9930 4, /* Hash table entry size. */
9931 1, /* Internal relocs per external relocs. */
9932 ARCH_SIZE
, /* Arch size. */
9933 LOG_FILE_ALIGN
, /* Log_file_align. */
9934 ELFCLASSNN
, EV_CURRENT
,
9935 bfd_elfNN_write_out_phdrs
,
9936 bfd_elfNN_write_shdrs_and_ehdr
,
9937 bfd_elfNN_checksum_contents
,
9938 bfd_elfNN_write_relocs
,
9939 bfd_elfNN_swap_symbol_in
,
9940 bfd_elfNN_swap_symbol_out
,
9941 bfd_elfNN_slurp_reloc_table
,
9942 bfd_elfNN_slurp_symbol_table
,
9943 bfd_elfNN_swap_dyn_in
,
9944 bfd_elfNN_swap_dyn_out
,
9945 bfd_elfNN_swap_reloc_in
,
9946 bfd_elfNN_swap_reloc_out
,
9947 bfd_elfNN_swap_reloca_in
,
9948 bfd_elfNN_swap_reloca_out
9951 #define ELF_ARCH bfd_arch_aarch64
9952 #define ELF_MACHINE_CODE EM_AARCH64
9953 #define ELF_MAXPAGESIZE 0x10000
9954 #define ELF_MINPAGESIZE 0x1000
9955 #define ELF_COMMONPAGESIZE 0x1000
9957 #define bfd_elfNN_close_and_cleanup \
9958 elfNN_aarch64_close_and_cleanup
9960 #define bfd_elfNN_bfd_free_cached_info \
9961 elfNN_aarch64_bfd_free_cached_info
9963 #define bfd_elfNN_bfd_is_target_special_symbol \
9964 elfNN_aarch64_is_target_special_symbol
9966 #define bfd_elfNN_bfd_link_hash_table_create \
9967 elfNN_aarch64_link_hash_table_create
9969 #define bfd_elfNN_bfd_merge_private_bfd_data \
9970 elfNN_aarch64_merge_private_bfd_data
9972 #define bfd_elfNN_bfd_print_private_bfd_data \
9973 elfNN_aarch64_print_private_bfd_data
9975 #define bfd_elfNN_bfd_reloc_type_lookup \
9976 elfNN_aarch64_reloc_type_lookup
9978 #define bfd_elfNN_bfd_reloc_name_lookup \
9979 elfNN_aarch64_reloc_name_lookup
9981 #define bfd_elfNN_bfd_set_private_flags \
9982 elfNN_aarch64_set_private_flags
9984 #define bfd_elfNN_find_inliner_info \
9985 elfNN_aarch64_find_inliner_info
9987 #define bfd_elfNN_get_synthetic_symtab \
9988 elfNN_aarch64_get_synthetic_symtab
9990 #define bfd_elfNN_mkobject \
9991 elfNN_aarch64_mkobject
9993 #define bfd_elfNN_new_section_hook \
9994 elfNN_aarch64_new_section_hook
9996 #define elf_backend_adjust_dynamic_symbol \
9997 elfNN_aarch64_adjust_dynamic_symbol
9999 #define elf_backend_always_size_sections \
10000 elfNN_aarch64_always_size_sections
10002 #define elf_backend_check_relocs \
10003 elfNN_aarch64_check_relocs
10005 #define elf_backend_copy_indirect_symbol \
10006 elfNN_aarch64_copy_indirect_symbol
10008 #define elf_backend_merge_symbol_attribute \
10009 elfNN_aarch64_merge_symbol_attribute
10011 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
10012 to them in our hash. */
10013 #define elf_backend_create_dynamic_sections \
10014 elfNN_aarch64_create_dynamic_sections
10016 #define elf_backend_init_index_section \
10017 _bfd_elf_init_2_index_sections
10019 #define elf_backend_finish_dynamic_sections \
10020 elfNN_aarch64_finish_dynamic_sections
10022 #define elf_backend_finish_dynamic_symbol \
10023 elfNN_aarch64_finish_dynamic_symbol
10025 #define elf_backend_object_p \
10026 elfNN_aarch64_object_p
10028 #define elf_backend_output_arch_local_syms \
10029 elfNN_aarch64_output_arch_local_syms
10031 #define elf_backend_maybe_function_sym \
10032 elfNN_aarch64_maybe_function_sym
10034 #define elf_backend_plt_sym_val \
10035 elfNN_aarch64_plt_sym_val
10037 #define elf_backend_init_file_header \
10038 elfNN_aarch64_init_file_header
10040 #define elf_backend_relocate_section \
10041 elfNN_aarch64_relocate_section
10043 #define elf_backend_reloc_type_class \
10044 elfNN_aarch64_reloc_type_class
10046 #define elf_backend_section_from_shdr \
10047 elfNN_aarch64_section_from_shdr
10049 #define elf_backend_size_dynamic_sections \
10050 elfNN_aarch64_size_dynamic_sections
10052 #define elf_backend_size_info \
10053 elfNN_aarch64_size_info
10055 #define elf_backend_write_section \
10056 elfNN_aarch64_write_section
10058 #define elf_backend_symbol_processing \
10059 elfNN_aarch64_backend_symbol_processing
10061 #define elf_backend_setup_gnu_properties \
10062 elfNN_aarch64_link_setup_gnu_properties
10064 #define elf_backend_merge_gnu_properties \
10065 elfNN_aarch64_merge_gnu_properties
10067 #define elf_backend_can_refcount 1
10068 #define elf_backend_can_gc_sections 1
10069 #define elf_backend_plt_readonly 1
10070 #define elf_backend_want_got_plt 1
10071 #define elf_backend_want_plt_sym 0
10072 #define elf_backend_want_dynrelro 1
10073 #define elf_backend_may_use_rel_p 0
10074 #define elf_backend_may_use_rela_p 1
10075 #define elf_backend_default_use_rela_p 1
10076 #define elf_backend_rela_normal 1
10077 #define elf_backend_dtrel_excludes_plt 1
10078 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
10079 #define elf_backend_default_execstack 0
10080 #define elf_backend_extern_protected_data 1
10081 #define elf_backend_hash_symbol elf_aarch64_hash_symbol
10083 #undef elf_backend_obj_attrs_section
10084 #define elf_backend_obj_attrs_section ".ARM.attributes"
10086 #include "elfNN-target.h"
10088 /* CloudABI support. */
10090 #undef TARGET_LITTLE_SYM
10091 #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec
10092 #undef TARGET_LITTLE_NAME
10093 #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi"
10094 #undef TARGET_BIG_SYM
10095 #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec
10096 #undef TARGET_BIG_NAME
10097 #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi"
10100 #define ELF_OSABI ELFOSABI_CLOUDABI
10103 #define elfNN_bed elfNN_aarch64_cloudabi_bed
10105 #include "elfNN-target.h"