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1 | /* AArch64-specific support for NN-bit ELF. | |
2 | Copyright (C) 2009-2020 Free Software Foundation, Inc. | |
3 | Contributed by ARM Ltd. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. */ | |
20 | ||
21 | /* Notes on implementation: | |
22 | ||
23 | Thread Local Store (TLS) | |
24 | ||
25 | Overview: | |
26 | ||
27 | The implementation currently supports both traditional TLS and TLS | |
28 | descriptors, but only general dynamic (GD). | |
29 | ||
30 | For traditional TLS the assembler will present us with code | |
31 | fragments of the form: | |
32 | ||
33 | adrp x0, :tlsgd:foo | |
34 | R_AARCH64_TLSGD_ADR_PAGE21(foo) | |
35 | add x0, :tlsgd_lo12:foo | |
36 | R_AARCH64_TLSGD_ADD_LO12_NC(foo) | |
37 | bl __tls_get_addr | |
38 | nop | |
39 | ||
40 | For TLS descriptors the assembler will present us with code | |
41 | fragments of the form: | |
42 | ||
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) | |
46 | .tlsdesccall foo | |
47 | blr x1 R_AARCH64_TLSDESC_CALL(foo) | |
48 | ||
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. | |
52 | ||
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. | |
56 | ||
57 | The precise instruction sequence is only relevant from the | |
58 | perspective of linker relaxation which is currently not implemented. | |
59 | ||
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. | |
64 | ||
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. | |
70 | ||
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. | |
75 | ||
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. | |
80 | ||
81 | Implementation: | |
82 | ||
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. | |
86 | ||
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. | |
92 | ||
93 | The flow: | |
94 | ||
95 | elfNN_aarch64_check_relocs() | |
96 | ||
97 | This function is invoked for each relocation. | |
98 | ||
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. | |
103 | ||
104 | The reference count for a symbol is incremented. The GOT type for | |
105 | each symbol is marked as general dynamic. | |
106 | ||
107 | elfNN_aarch64_allocate_dynrelocs () | |
108 | ||
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 | |
113 | for this symbol. | |
114 | ||
115 | elfNN_aarch64_size_dynamic_sections () | |
116 | ||
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. | |
121 | ||
122 | elfNN_aarch64_relocate_section () | |
123 | ||
124 | Calls elfNN_aarch64_final_link_relocate () | |
125 | ||
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. | |
133 | ||
134 | elfNN_aarch64_final_link_relocate () | |
135 | ||
136 | Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */ | |
137 | ||
138 | #include "sysdep.h" | |
139 | #include "bfd.h" | |
140 | #include "libiberty.h" | |
141 | #include "libbfd.h" | |
142 | #include "elf-bfd.h" | |
143 | #include "bfdlink.h" | |
144 | #include "objalloc.h" | |
145 | #include "elf/aarch64.h" | |
146 | #include "elfxx-aarch64.h" | |
147 | #include "cpu-aarch64.h" | |
148 | ||
149 | #define ARCH_SIZE NN | |
150 | ||
151 | #if ARCH_SIZE == 64 | |
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 | |
158 | #endif | |
159 | ||
160 | #define MORELLO_R(NAME) R_MORELLO_ ## NAME | |
161 | #define MORELLO_R_STR(NAME) "R_MORELLO_" #NAME | |
162 | ||
163 | #if ARCH_SIZE == 32 | |
164 | #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME | |
165 | #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME | |
166 | #define HOWTO64(...) EMPTY_HOWTO (0) | |
167 | #define HOWTO32(...) HOWTO (__VA_ARGS__) | |
168 | #define LOG_FILE_ALIGN 2 | |
169 | #define BFD_RELOC_AARCH64_TLSDESC_LD32_LO12 BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC | |
170 | #define R_AARCH64_P32_TLSDESC_ADD_LO12 R_AARCH64_P32_TLSDESC_ADD_LO12_NC | |
171 | #endif | |
172 | ||
173 | #define IS_AARCH64_TLS_RELOC(R_TYPE) \ | |
174 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ | |
175 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ | |
176 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \ | |
177 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \ | |
178 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \ | |
179 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ | |
180 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \ | |
181 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ | |
182 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ | |
183 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ | |
184 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ | |
185 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12 \ | |
186 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \ | |
187 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC \ | |
188 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \ | |
189 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \ | |
190 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \ | |
191 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12 \ | |
192 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC \ | |
193 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12 \ | |
194 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC \ | |
195 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12 \ | |
196 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC \ | |
197 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12 \ | |
198 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC \ | |
199 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0 \ | |
200 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC \ | |
201 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1 \ | |
202 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC \ | |
203 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2 \ | |
204 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \ | |
205 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \ | |
206 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ | |
207 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12 \ | |
208 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC \ | |
209 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12 \ | |
210 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC \ | |
211 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12 \ | |
212 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC \ | |
213 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12 \ | |
214 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC \ | |
215 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \ | |
216 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ | |
217 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \ | |
218 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ | |
219 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \ | |
220 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \ | |
221 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \ | |
222 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \ | |
223 | || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) | |
224 | ||
225 | #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \ | |
226 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ | |
227 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \ | |
228 | || (R_TYPE) == BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20 \ | |
229 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ | |
230 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ | |
231 | || (R_TYPE) == BFD_RELOC_MORELLO_TLSDESC_CALL \ | |
232 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ | |
233 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ | |
234 | || (R_TYPE) == BFD_RELOC_MORELLO_TLSDESC_LD128_LO12 \ | |
235 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \ | |
236 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ | |
237 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ | |
238 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \ | |
239 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ | |
240 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ | |
241 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \ | |
242 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ | |
243 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \ | |
244 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \ | |
245 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ | |
246 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ | |
247 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \ | |
248 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \ | |
249 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \ | |
250 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21) | |
251 | ||
252 | #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ | |
253 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \ | |
254 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ | |
255 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \ | |
256 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ | |
257 | || (R_TYPE) == BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20 \ | |
258 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ | |
259 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ | |
260 | || (R_TYPE) == BFD_RELOC_MORELLO_TLSDESC_CALL \ | |
261 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \ | |
262 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 \ | |
263 | || (R_TYPE) == BFD_RELOC_MORELLO_TLSDESC_LD128_LO12 \ | |
264 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ | |
265 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ | |
266 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ | |
267 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1) | |
268 | ||
269 | #define ELIMINATE_COPY_RELOCS 1 | |
270 | ||
271 | /* Return size of a relocation entry. HTAB is the bfd's | |
272 | elf_aarch64_link_hash_entry. */ | |
273 | #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela)) | |
274 | ||
275 | /* GOT Entry size - 16 bytes in C64, 8 bytes in ELF64 and 4 bytes in ELF32. */ | |
276 | #define GOT_ENTRY_SIZE(htab) (ARCH_SIZE >> (3 - htab->c64_rel)) | |
277 | #define GOT_RESERVED_HEADER_SLOTS (3) | |
278 | #define PLT_ENTRY_SIZE (32) | |
279 | #define PLT_SMALL_ENTRY_SIZE (16) | |
280 | #define PLT_TLSDESC_ENTRY_SIZE (32) | |
281 | /* PLT sizes with BTI insn. */ | |
282 | #define PLT_BTI_SMALL_ENTRY_SIZE (24) | |
283 | /* PLT sizes with PAC insn. */ | |
284 | #define PLT_PAC_SMALL_ENTRY_SIZE (24) | |
285 | /* PLT sizes with BTI and PAC insn. */ | |
286 | #define PLT_BTI_PAC_SMALL_ENTRY_SIZE (24) | |
287 | ||
288 | /* Encoding of the nop instruction. */ | |
289 | #define INSN_NOP 0xd503201f | |
290 | ||
291 | #define aarch64_compute_jump_table_size(htab) \ | |
292 | (((htab)->root.srelplt == NULL) ? 0 \ | |
293 | : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE (htab)) | |
294 | ||
295 | /* The first entry in a procedure linkage table looks like this | |
296 | if the distance between the PLTGOT and the PLT is < 4GB use | |
297 | these PLT entries. Note that the dynamic linker gets &PLTGOT[2] | |
298 | in x16 and needs to work out PLTGOT[1] by using an address of | |
299 | [x16,#-GOT_ENTRY_SIZE]. */ | |
300 | static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = | |
301 | { | |
302 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ | |
303 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ | |
304 | #if ARCH_SIZE == 64 | |
305 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
306 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ | |
307 | #else | |
308 | 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
309 | 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */ | |
310 | #endif | |
311 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ | |
312 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
313 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
314 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
315 | }; | |
316 | ||
317 | static const bfd_byte elfNN_aarch64_small_plt0_bti_entry[PLT_ENTRY_SIZE] = | |
318 | { | |
319 | 0x5f, 0x24, 0x03, 0xd5, /* bti c. */ | |
320 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ | |
321 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ | |
322 | #if ARCH_SIZE == 64 | |
323 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
324 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ | |
325 | #else | |
326 | 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
327 | 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */ | |
328 | #endif | |
329 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ | |
330 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
331 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
332 | }; | |
333 | ||
334 | /* The C64 PLT0. */ | |
335 | static const bfd_byte elfNN_c64_small_plt0_entry[PLT_ENTRY_SIZE] = | |
336 | { | |
337 | 0xf0, 0x7b, 0xbf, 0x62, /* stp c16, c30, [csp, #-32]! */ | |
338 | 0x10, 0x00, 0x80, 0x90, /* adrp c16, (GOT+16) */ | |
339 | 0x11, 0x0a, 0x40, 0xc2, /* ldr c17, [c16, #PLT_GOT+0x10] */ | |
340 | 0x10, 0x02, 0x00, 0x02, /* add c16, c16,#PLT_GOT+0x10 */ | |
341 | 0x20, 0x12, 0xc2, 0xc2, /* br c17 */ | |
342 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
343 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
344 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
345 | }; | |
346 | ||
347 | /* Per function entry in a procedure linkage table looks like this | |
348 | if the distance between the PLTGOT and the PLT is < 4GB use | |
349 | these PLT entries. Use BTI versions of the PLTs when enabled. */ | |
350 | static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = | |
351 | { | |
352 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ | |
353 | #if ARCH_SIZE == 64 | |
354 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
355 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
356 | #else | |
357 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ | |
358 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
359 | #endif | |
360 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ | |
361 | }; | |
362 | ||
363 | /* The C64 PLT. */ | |
364 | static const bfd_byte elfNN_c64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = | |
365 | { | |
366 | 0x10, 0x00, 0x80, 0x90, /* adrp c16, PLTGOT + offset */ | |
367 | 0x11, 0x02, 0x40, 0xc2, /* ldr c17, [c16, PLTGOT + offset] */ | |
368 | 0x10, 0x02, 0x00, 0x02, /* add c16, c16, :lo12:PLTGOT + offset */ | |
369 | 0x20, 0x12, 0xc2, 0xc2, /* br c17. */ | |
370 | }; | |
371 | ||
372 | static const bfd_byte | |
373 | elfNN_aarch64_small_plt_bti_entry[PLT_BTI_SMALL_ENTRY_SIZE] = | |
374 | { | |
375 | 0x5f, 0x24, 0x03, 0xd5, /* bti c. */ | |
376 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ | |
377 | #if ARCH_SIZE == 64 | |
378 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
379 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
380 | #else | |
381 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ | |
382 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
383 | #endif | |
384 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ | |
385 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
386 | }; | |
387 | ||
388 | static const bfd_byte | |
389 | elfNN_aarch64_small_plt_pac_entry[PLT_PAC_SMALL_ENTRY_SIZE] = | |
390 | { | |
391 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ | |
392 | #if ARCH_SIZE == 64 | |
393 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
394 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
395 | #else | |
396 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ | |
397 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
398 | #endif | |
399 | 0x9f, 0x21, 0x03, 0xd5, /* autia1716 */ | |
400 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ | |
401 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
402 | }; | |
403 | ||
404 | static const bfd_byte | |
405 | elfNN_aarch64_small_plt_bti_pac_entry[PLT_BTI_PAC_SMALL_ENTRY_SIZE] = | |
406 | { | |
407 | 0x5f, 0x24, 0x03, 0xd5, /* bti c. */ | |
408 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ | |
409 | #if ARCH_SIZE == 64 | |
410 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
411 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
412 | #else | |
413 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ | |
414 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
415 | #endif | |
416 | 0x9f, 0x21, 0x03, 0xd5, /* autia1716 */ | |
417 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ | |
418 | }; | |
419 | ||
420 | static const bfd_byte | |
421 | elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = | |
422 | { | |
423 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ | |
424 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ | |
425 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ | |
426 | #if ARCH_SIZE == 64 | |
427 | 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */ | |
428 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ | |
429 | #else | |
430 | 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */ | |
431 | 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */ | |
432 | #endif | |
433 | 0x40, 0x00, 0x1f, 0xd6, /* br x2 */ | |
434 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
435 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
436 | }; | |
437 | ||
438 | static const bfd_byte | |
439 | elfNN_aarch64_tlsdesc_small_plt_bti_entry[PLT_TLSDESC_ENTRY_SIZE] = | |
440 | { | |
441 | 0x5f, 0x24, 0x03, 0xd5, /* bti c. */ | |
442 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ | |
443 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ | |
444 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ | |
445 | #if ARCH_SIZE == 64 | |
446 | 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */ | |
447 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ | |
448 | #else | |
449 | 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */ | |
450 | 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */ | |
451 | #endif | |
452 | 0x40, 0x00, 0x1f, 0xd6, /* br x2 */ | |
453 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
454 | }; | |
455 | ||
456 | static const bfd_byte | |
457 | elfNN_aarch64_tlsdesc_small_plt_c64_entry[PLT_TLSDESC_ENTRY_SIZE] = | |
458 | { | |
459 | 0xe2, 0x8f, 0xbf, 0x62, /* stp c2, c3, [sp, #-16]! */ | |
460 | 0x02, 0x00, 0x80, 0x90, /* adrp c2, 0 */ | |
461 | 0x03, 0x00, 0x80, 0x90, /* adrp c3, 0 */ | |
462 | 0x42, 0x00, 0x40, 0xc2, /* ldr c2, [c2, #0] */ | |
463 | 0x63, 0x00, 0x00, 0x02, /* add c3, c3, 0 */ | |
464 | 0x40, 0x10, 0xc2, 0xc2, /* br c2 */ | |
465 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
466 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
467 | }; | |
468 | ||
469 | #define elf_info_to_howto elfNN_aarch64_info_to_howto | |
470 | #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto | |
471 | ||
472 | #define AARCH64_ELF_ABI_VERSION 0 | |
473 | ||
474 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ | |
475 | #define ALL_ONES (~ (bfd_vma) 0) | |
476 | ||
477 | /* Indexed by the bfd interal reloc enumerators. | |
478 | Therefore, the table needs to be synced with BFD_RELOC_AARCH64_* | |
479 | in reloc.c. */ | |
480 | ||
481 | static reloc_howto_type elfNN_aarch64_howto_table[] = | |
482 | { | |
483 | EMPTY_HOWTO (0), | |
484 | ||
485 | /* Basic data relocations. */ | |
486 | ||
487 | /* Deprecated, but retained for backwards compatibility. */ | |
488 | HOWTO64 (R_AARCH64_NULL, /* type */ | |
489 | 0, /* rightshift */ | |
490 | 3, /* size (0 = byte, 1 = short, 2 = long) */ | |
491 | 0, /* bitsize */ | |
492 | FALSE, /* pc_relative */ | |
493 | 0, /* bitpos */ | |
494 | complain_overflow_dont, /* complain_on_overflow */ | |
495 | bfd_elf_generic_reloc, /* special_function */ | |
496 | "R_AARCH64_NULL", /* name */ | |
497 | FALSE, /* partial_inplace */ | |
498 | 0, /* src_mask */ | |
499 | 0, /* dst_mask */ | |
500 | FALSE), /* pcrel_offset */ | |
501 | HOWTO (R_AARCH64_NONE, /* type */ | |
502 | 0, /* rightshift */ | |
503 | 3, /* size (0 = byte, 1 = short, 2 = long) */ | |
504 | 0, /* bitsize */ | |
505 | FALSE, /* pc_relative */ | |
506 | 0, /* bitpos */ | |
507 | complain_overflow_dont, /* complain_on_overflow */ | |
508 | bfd_elf_generic_reloc, /* special_function */ | |
509 | "R_AARCH64_NONE", /* name */ | |
510 | FALSE, /* partial_inplace */ | |
511 | 0, /* src_mask */ | |
512 | 0, /* dst_mask */ | |
513 | FALSE), /* pcrel_offset */ | |
514 | ||
515 | /* .xword: (S+A) */ | |
516 | HOWTO64 (AARCH64_R (ABS64), /* type */ | |
517 | 0, /* rightshift */ | |
518 | 4, /* size (4 = long long) */ | |
519 | 64, /* bitsize */ | |
520 | FALSE, /* pc_relative */ | |
521 | 0, /* bitpos */ | |
522 | complain_overflow_unsigned, /* complain_on_overflow */ | |
523 | bfd_elf_generic_reloc, /* special_function */ | |
524 | AARCH64_R_STR (ABS64), /* name */ | |
525 | FALSE, /* partial_inplace */ | |
526 | ALL_ONES, /* src_mask */ | |
527 | ALL_ONES, /* dst_mask */ | |
528 | FALSE), /* pcrel_offset */ | |
529 | ||
530 | /* .word: (S+A) */ | |
531 | HOWTO (AARCH64_R (ABS32), /* type */ | |
532 | 0, /* rightshift */ | |
533 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
534 | 32, /* bitsize */ | |
535 | FALSE, /* pc_relative */ | |
536 | 0, /* bitpos */ | |
537 | complain_overflow_unsigned, /* complain_on_overflow */ | |
538 | bfd_elf_generic_reloc, /* special_function */ | |
539 | AARCH64_R_STR (ABS32), /* name */ | |
540 | FALSE, /* partial_inplace */ | |
541 | 0xffffffff, /* src_mask */ | |
542 | 0xffffffff, /* dst_mask */ | |
543 | FALSE), /* pcrel_offset */ | |
544 | ||
545 | /* .half: (S+A) */ | |
546 | HOWTO (AARCH64_R (ABS16), /* type */ | |
547 | 0, /* rightshift */ | |
548 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
549 | 16, /* bitsize */ | |
550 | FALSE, /* pc_relative */ | |
551 | 0, /* bitpos */ | |
552 | complain_overflow_unsigned, /* complain_on_overflow */ | |
553 | bfd_elf_generic_reloc, /* special_function */ | |
554 | AARCH64_R_STR (ABS16), /* name */ | |
555 | FALSE, /* partial_inplace */ | |
556 | 0xffff, /* src_mask */ | |
557 | 0xffff, /* dst_mask */ | |
558 | FALSE), /* pcrel_offset */ | |
559 | ||
560 | /* .xword: (S+A-P) */ | |
561 | HOWTO64 (AARCH64_R (PREL64), /* type */ | |
562 | 0, /* rightshift */ | |
563 | 4, /* size (4 = long long) */ | |
564 | 64, /* bitsize */ | |
565 | TRUE, /* pc_relative */ | |
566 | 0, /* bitpos */ | |
567 | complain_overflow_signed, /* complain_on_overflow */ | |
568 | bfd_elf_generic_reloc, /* special_function */ | |
569 | AARCH64_R_STR (PREL64), /* name */ | |
570 | FALSE, /* partial_inplace */ | |
571 | ALL_ONES, /* src_mask */ | |
572 | ALL_ONES, /* dst_mask */ | |
573 | TRUE), /* pcrel_offset */ | |
574 | ||
575 | /* .word: (S+A-P) */ | |
576 | HOWTO (AARCH64_R (PREL32), /* type */ | |
577 | 0, /* rightshift */ | |
578 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
579 | 32, /* bitsize */ | |
580 | TRUE, /* pc_relative */ | |
581 | 0, /* bitpos */ | |
582 | complain_overflow_signed, /* complain_on_overflow */ | |
583 | bfd_elf_generic_reloc, /* special_function */ | |
584 | AARCH64_R_STR (PREL32), /* name */ | |
585 | FALSE, /* partial_inplace */ | |
586 | 0xffffffff, /* src_mask */ | |
587 | 0xffffffff, /* dst_mask */ | |
588 | TRUE), /* pcrel_offset */ | |
589 | ||
590 | /* .half: (S+A-P) */ | |
591 | HOWTO (AARCH64_R (PREL16), /* type */ | |
592 | 0, /* rightshift */ | |
593 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
594 | 16, /* bitsize */ | |
595 | TRUE, /* pc_relative */ | |
596 | 0, /* bitpos */ | |
597 | complain_overflow_signed, /* complain_on_overflow */ | |
598 | bfd_elf_generic_reloc, /* special_function */ | |
599 | AARCH64_R_STR (PREL16), /* name */ | |
600 | FALSE, /* partial_inplace */ | |
601 | 0xffff, /* src_mask */ | |
602 | 0xffff, /* dst_mask */ | |
603 | TRUE), /* pcrel_offset */ | |
604 | ||
605 | /* Group relocations to create a 16, 32, 48 or 64 bit | |
606 | unsigned data or abs address inline. */ | |
607 | ||
608 | /* MOVZ: ((S+A) >> 0) & 0xffff */ | |
609 | HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */ | |
610 | 0, /* rightshift */ | |
611 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
612 | 16, /* bitsize */ | |
613 | FALSE, /* pc_relative */ | |
614 | 0, /* bitpos */ | |
615 | complain_overflow_unsigned, /* complain_on_overflow */ | |
616 | bfd_elf_generic_reloc, /* special_function */ | |
617 | AARCH64_R_STR (MOVW_UABS_G0), /* name */ | |
618 | FALSE, /* partial_inplace */ | |
619 | 0xffff, /* src_mask */ | |
620 | 0xffff, /* dst_mask */ | |
621 | FALSE), /* pcrel_offset */ | |
622 | ||
623 | /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ | |
624 | HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */ | |
625 | 0, /* rightshift */ | |
626 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
627 | 16, /* bitsize */ | |
628 | FALSE, /* pc_relative */ | |
629 | 0, /* bitpos */ | |
630 | complain_overflow_dont, /* complain_on_overflow */ | |
631 | bfd_elf_generic_reloc, /* special_function */ | |
632 | AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */ | |
633 | FALSE, /* partial_inplace */ | |
634 | 0xffff, /* src_mask */ | |
635 | 0xffff, /* dst_mask */ | |
636 | FALSE), /* pcrel_offset */ | |
637 | ||
638 | /* MOVZ: ((S+A) >> 16) & 0xffff */ | |
639 | HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */ | |
640 | 16, /* rightshift */ | |
641 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
642 | 16, /* bitsize */ | |
643 | FALSE, /* pc_relative */ | |
644 | 0, /* bitpos */ | |
645 | complain_overflow_unsigned, /* complain_on_overflow */ | |
646 | bfd_elf_generic_reloc, /* special_function */ | |
647 | AARCH64_R_STR (MOVW_UABS_G1), /* name */ | |
648 | FALSE, /* partial_inplace */ | |
649 | 0xffff, /* src_mask */ | |
650 | 0xffff, /* dst_mask */ | |
651 | FALSE), /* pcrel_offset */ | |
652 | ||
653 | /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ | |
654 | HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */ | |
655 | 16, /* rightshift */ | |
656 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
657 | 16, /* bitsize */ | |
658 | FALSE, /* pc_relative */ | |
659 | 0, /* bitpos */ | |
660 | complain_overflow_dont, /* complain_on_overflow */ | |
661 | bfd_elf_generic_reloc, /* special_function */ | |
662 | AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */ | |
663 | FALSE, /* partial_inplace */ | |
664 | 0xffff, /* src_mask */ | |
665 | 0xffff, /* dst_mask */ | |
666 | FALSE), /* pcrel_offset */ | |
667 | ||
668 | /* MOVZ: ((S+A) >> 32) & 0xffff */ | |
669 | HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */ | |
670 | 32, /* rightshift */ | |
671 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
672 | 16, /* bitsize */ | |
673 | FALSE, /* pc_relative */ | |
674 | 0, /* bitpos */ | |
675 | complain_overflow_unsigned, /* complain_on_overflow */ | |
676 | bfd_elf_generic_reloc, /* special_function */ | |
677 | AARCH64_R_STR (MOVW_UABS_G2), /* name */ | |
678 | FALSE, /* partial_inplace */ | |
679 | 0xffff, /* src_mask */ | |
680 | 0xffff, /* dst_mask */ | |
681 | FALSE), /* pcrel_offset */ | |
682 | ||
683 | /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ | |
684 | HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */ | |
685 | 32, /* rightshift */ | |
686 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
687 | 16, /* bitsize */ | |
688 | FALSE, /* pc_relative */ | |
689 | 0, /* bitpos */ | |
690 | complain_overflow_dont, /* complain_on_overflow */ | |
691 | bfd_elf_generic_reloc, /* special_function */ | |
692 | AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */ | |
693 | FALSE, /* partial_inplace */ | |
694 | 0xffff, /* src_mask */ | |
695 | 0xffff, /* dst_mask */ | |
696 | FALSE), /* pcrel_offset */ | |
697 | ||
698 | /* MOVZ: ((S+A) >> 48) & 0xffff */ | |
699 | HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */ | |
700 | 48, /* rightshift */ | |
701 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
702 | 16, /* bitsize */ | |
703 | FALSE, /* pc_relative */ | |
704 | 0, /* bitpos */ | |
705 | complain_overflow_unsigned, /* complain_on_overflow */ | |
706 | bfd_elf_generic_reloc, /* special_function */ | |
707 | AARCH64_R_STR (MOVW_UABS_G3), /* name */ | |
708 | FALSE, /* partial_inplace */ | |
709 | 0xffff, /* src_mask */ | |
710 | 0xffff, /* dst_mask */ | |
711 | FALSE), /* pcrel_offset */ | |
712 | ||
713 | /* Group relocations to create high part of a 16, 32, 48 or 64 bit | |
714 | signed data or abs address inline. Will change instruction | |
715 | to MOVN or MOVZ depending on sign of calculated value. */ | |
716 | ||
717 | /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ | |
718 | HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */ | |
719 | 0, /* rightshift */ | |
720 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
721 | 17, /* bitsize */ | |
722 | FALSE, /* pc_relative */ | |
723 | 0, /* bitpos */ | |
724 | complain_overflow_signed, /* complain_on_overflow */ | |
725 | bfd_elf_generic_reloc, /* special_function */ | |
726 | AARCH64_R_STR (MOVW_SABS_G0), /* name */ | |
727 | FALSE, /* partial_inplace */ | |
728 | 0xffff, /* src_mask */ | |
729 | 0xffff, /* dst_mask */ | |
730 | FALSE), /* pcrel_offset */ | |
731 | ||
732 | /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ | |
733 | HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */ | |
734 | 16, /* rightshift */ | |
735 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
736 | 17, /* bitsize */ | |
737 | FALSE, /* pc_relative */ | |
738 | 0, /* bitpos */ | |
739 | complain_overflow_signed, /* complain_on_overflow */ | |
740 | bfd_elf_generic_reloc, /* special_function */ | |
741 | AARCH64_R_STR (MOVW_SABS_G1), /* name */ | |
742 | FALSE, /* partial_inplace */ | |
743 | 0xffff, /* src_mask */ | |
744 | 0xffff, /* dst_mask */ | |
745 | FALSE), /* pcrel_offset */ | |
746 | ||
747 | /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ | |
748 | HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */ | |
749 | 32, /* rightshift */ | |
750 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
751 | 17, /* bitsize */ | |
752 | FALSE, /* pc_relative */ | |
753 | 0, /* bitpos */ | |
754 | complain_overflow_signed, /* complain_on_overflow */ | |
755 | bfd_elf_generic_reloc, /* special_function */ | |
756 | AARCH64_R_STR (MOVW_SABS_G2), /* name */ | |
757 | FALSE, /* partial_inplace */ | |
758 | 0xffff, /* src_mask */ | |
759 | 0xffff, /* dst_mask */ | |
760 | FALSE), /* pcrel_offset */ | |
761 | ||
762 | /* Group relocations to create a 16, 32, 48 or 64 bit | |
763 | PC relative address inline. */ | |
764 | ||
765 | /* MOV[NZ]: ((S+A-P) >> 0) & 0xffff */ | |
766 | HOWTO (AARCH64_R (MOVW_PREL_G0), /* type */ | |
767 | 0, /* rightshift */ | |
768 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
769 | 17, /* bitsize */ | |
770 | TRUE, /* pc_relative */ | |
771 | 0, /* bitpos */ | |
772 | complain_overflow_signed, /* complain_on_overflow */ | |
773 | bfd_elf_generic_reloc, /* special_function */ | |
774 | AARCH64_R_STR (MOVW_PREL_G0), /* name */ | |
775 | FALSE, /* partial_inplace */ | |
776 | 0xffff, /* src_mask */ | |
777 | 0xffff, /* dst_mask */ | |
778 | TRUE), /* pcrel_offset */ | |
779 | ||
780 | /* MOVK: ((S+A-P) >> 0) & 0xffff [no overflow check] */ | |
781 | HOWTO (AARCH64_R (MOVW_PREL_G0_NC), /* type */ | |
782 | 0, /* rightshift */ | |
783 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
784 | 16, /* bitsize */ | |
785 | TRUE, /* pc_relative */ | |
786 | 0, /* bitpos */ | |
787 | complain_overflow_dont, /* complain_on_overflow */ | |
788 | bfd_elf_generic_reloc, /* special_function */ | |
789 | AARCH64_R_STR (MOVW_PREL_G0_NC), /* name */ | |
790 | FALSE, /* partial_inplace */ | |
791 | 0xffff, /* src_mask */ | |
792 | 0xffff, /* dst_mask */ | |
793 | TRUE), /* pcrel_offset */ | |
794 | ||
795 | /* MOV[NZ]: ((S+A-P) >> 16) & 0xffff */ | |
796 | HOWTO (AARCH64_R (MOVW_PREL_G1), /* type */ | |
797 | 16, /* rightshift */ | |
798 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
799 | 17, /* bitsize */ | |
800 | TRUE, /* pc_relative */ | |
801 | 0, /* bitpos */ | |
802 | complain_overflow_signed, /* complain_on_overflow */ | |
803 | bfd_elf_generic_reloc, /* special_function */ | |
804 | AARCH64_R_STR (MOVW_PREL_G1), /* name */ | |
805 | FALSE, /* partial_inplace */ | |
806 | 0xffff, /* src_mask */ | |
807 | 0xffff, /* dst_mask */ | |
808 | TRUE), /* pcrel_offset */ | |
809 | ||
810 | /* MOVK: ((S+A-P) >> 16) & 0xffff [no overflow check] */ | |
811 | HOWTO64 (AARCH64_R (MOVW_PREL_G1_NC), /* type */ | |
812 | 16, /* rightshift */ | |
813 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
814 | 16, /* bitsize */ | |
815 | TRUE, /* pc_relative */ | |
816 | 0, /* bitpos */ | |
817 | complain_overflow_dont, /* complain_on_overflow */ | |
818 | bfd_elf_generic_reloc, /* special_function */ | |
819 | AARCH64_R_STR (MOVW_PREL_G1_NC), /* name */ | |
820 | FALSE, /* partial_inplace */ | |
821 | 0xffff, /* src_mask */ | |
822 | 0xffff, /* dst_mask */ | |
823 | TRUE), /* pcrel_offset */ | |
824 | ||
825 | /* MOV[NZ]: ((S+A-P) >> 32) & 0xffff */ | |
826 | HOWTO64 (AARCH64_R (MOVW_PREL_G2), /* type */ | |
827 | 32, /* rightshift */ | |
828 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
829 | 17, /* bitsize */ | |
830 | TRUE, /* pc_relative */ | |
831 | 0, /* bitpos */ | |
832 | complain_overflow_signed, /* complain_on_overflow */ | |
833 | bfd_elf_generic_reloc, /* special_function */ | |
834 | AARCH64_R_STR (MOVW_PREL_G2), /* name */ | |
835 | FALSE, /* partial_inplace */ | |
836 | 0xffff, /* src_mask */ | |
837 | 0xffff, /* dst_mask */ | |
838 | TRUE), /* pcrel_offset */ | |
839 | ||
840 | /* MOVK: ((S+A-P) >> 32) & 0xffff [no overflow check] */ | |
841 | HOWTO64 (AARCH64_R (MOVW_PREL_G2_NC), /* type */ | |
842 | 32, /* rightshift */ | |
843 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
844 | 16, /* bitsize */ | |
845 | TRUE, /* pc_relative */ | |
846 | 0, /* bitpos */ | |
847 | complain_overflow_dont, /* complain_on_overflow */ | |
848 | bfd_elf_generic_reloc, /* special_function */ | |
849 | AARCH64_R_STR (MOVW_PREL_G2_NC), /* name */ | |
850 | FALSE, /* partial_inplace */ | |
851 | 0xffff, /* src_mask */ | |
852 | 0xffff, /* dst_mask */ | |
853 | TRUE), /* pcrel_offset */ | |
854 | ||
855 | /* MOV[NZ]: ((S+A-P) >> 48) & 0xffff */ | |
856 | HOWTO64 (AARCH64_R (MOVW_PREL_G3), /* type */ | |
857 | 48, /* rightshift */ | |
858 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
859 | 16, /* bitsize */ | |
860 | TRUE, /* pc_relative */ | |
861 | 0, /* bitpos */ | |
862 | complain_overflow_dont, /* complain_on_overflow */ | |
863 | bfd_elf_generic_reloc, /* special_function */ | |
864 | AARCH64_R_STR (MOVW_PREL_G3), /* name */ | |
865 | FALSE, /* partial_inplace */ | |
866 | 0xffff, /* src_mask */ | |
867 | 0xffff, /* dst_mask */ | |
868 | TRUE), /* pcrel_offset */ | |
869 | ||
870 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store | |
871 | addresses: PG(x) is (x & ~0xfff). */ | |
872 | ||
873 | /* LD-lit: ((S+A-P) >> 4) & 0x1ffff */ | |
874 | HOWTO64 (MORELLO_R (LD_PREL_LO17), /* type */ | |
875 | 4, /* rightshift */ | |
876 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
877 | 17, /* bitsize */ | |
878 | TRUE, /* pc_relative */ | |
879 | 0, /* bitpos */ | |
880 | complain_overflow_signed, /* complain_on_overflow */ | |
881 | bfd_elf_generic_reloc, /* special_function */ | |
882 | MORELLO_R_STR (LD_PREL_LO17), /* name */ | |
883 | FALSE, /* partial_inplace */ | |
884 | 0x1ffff, /* src_mask */ | |
885 | 0x1ffff, /* dst_mask */ | |
886 | TRUE), /* pcrel_offset */ | |
887 | ||
888 | /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ | |
889 | HOWTO (AARCH64_R (LD_PREL_LO19), /* type */ | |
890 | 2, /* rightshift */ | |
891 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
892 | 19, /* bitsize */ | |
893 | TRUE, /* pc_relative */ | |
894 | 0, /* bitpos */ | |
895 | complain_overflow_signed, /* complain_on_overflow */ | |
896 | bfd_elf_generic_reloc, /* special_function */ | |
897 | AARCH64_R_STR (LD_PREL_LO19), /* name */ | |
898 | FALSE, /* partial_inplace */ | |
899 | 0x7ffff, /* src_mask */ | |
900 | 0x7ffff, /* dst_mask */ | |
901 | TRUE), /* pcrel_offset */ | |
902 | ||
903 | /* C64 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0xfffff */ | |
904 | HOWTO64 (MORELLO_R (ADR_PREL_PG_HI20), /* type */ | |
905 | 12, /* rightshift */ | |
906 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
907 | 20, /* bitsize */ | |
908 | TRUE, /* pc_relative */ | |
909 | 0, /* bitpos */ | |
910 | complain_overflow_signed, /* complain_on_overflow */ | |
911 | bfd_elf_generic_reloc, /* special_function */ | |
912 | MORELLO_R_STR (ADR_PREL_PG_HI20), /* name */ | |
913 | FALSE, /* partial_inplace */ | |
914 | 0xfffff, /* src_mask */ | |
915 | 0xfffff, /* dst_mask */ | |
916 | TRUE), /* pcrel_offset */ | |
917 | ||
918 | /* C64 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0xfffff [no overflow check] */ | |
919 | HOWTO64 (MORELLO_R (ADR_PREL_PG_HI20_NC), /* type */ | |
920 | 12, /* rightshift */ | |
921 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
922 | 20, /* bitsize */ | |
923 | TRUE, /* pc_relative */ | |
924 | 0, /* bitpos */ | |
925 | complain_overflow_dont, /* complain_on_overflow */ | |
926 | bfd_elf_generic_reloc, /* special_function */ | |
927 | MORELLO_R_STR (ADR_PREL_PG_HI20_NC), /* name */ | |
928 | FALSE, /* partial_inplace */ | |
929 | 0xfffff, /* src_mask */ | |
930 | 0xfffff, /* dst_mask */ | |
931 | TRUE), /* pcrel_offset */ | |
932 | ||
933 | /* ADR: (S+A-P) & 0x1fffff */ | |
934 | HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */ | |
935 | 0, /* rightshift */ | |
936 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
937 | 21, /* bitsize */ | |
938 | TRUE, /* pc_relative */ | |
939 | 0, /* bitpos */ | |
940 | complain_overflow_signed, /* complain_on_overflow */ | |
941 | bfd_elf_generic_reloc, /* special_function */ | |
942 | AARCH64_R_STR (ADR_PREL_LO21), /* name */ | |
943 | FALSE, /* partial_inplace */ | |
944 | 0x1fffff, /* src_mask */ | |
945 | 0x1fffff, /* dst_mask */ | |
946 | TRUE), /* pcrel_offset */ | |
947 | ||
948 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
949 | HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */ | |
950 | 12, /* rightshift */ | |
951 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
952 | 21, /* bitsize */ | |
953 | TRUE, /* pc_relative */ | |
954 | 0, /* bitpos */ | |
955 | complain_overflow_signed, /* complain_on_overflow */ | |
956 | bfd_elf_generic_reloc, /* special_function */ | |
957 | AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */ | |
958 | FALSE, /* partial_inplace */ | |
959 | 0x1fffff, /* src_mask */ | |
960 | 0x1fffff, /* dst_mask */ | |
961 | TRUE), /* pcrel_offset */ | |
962 | ||
963 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ | |
964 | HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */ | |
965 | 12, /* rightshift */ | |
966 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
967 | 21, /* bitsize */ | |
968 | TRUE, /* pc_relative */ | |
969 | 0, /* bitpos */ | |
970 | complain_overflow_dont, /* complain_on_overflow */ | |
971 | bfd_elf_generic_reloc, /* special_function */ | |
972 | AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */ | |
973 | FALSE, /* partial_inplace */ | |
974 | 0x1fffff, /* src_mask */ | |
975 | 0x1fffff, /* dst_mask */ | |
976 | TRUE), /* pcrel_offset */ | |
977 | ||
978 | /* ADD: (S+A) & 0xfff [no overflow check] */ | |
979 | HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */ | |
980 | 0, /* rightshift */ | |
981 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
982 | 12, /* bitsize */ | |
983 | FALSE, /* pc_relative */ | |
984 | 10, /* bitpos */ | |
985 | complain_overflow_dont, /* complain_on_overflow */ | |
986 | bfd_elf_generic_reloc, /* special_function */ | |
987 | AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */ | |
988 | FALSE, /* partial_inplace */ | |
989 | 0x3ffc00, /* src_mask */ | |
990 | 0x3ffc00, /* dst_mask */ | |
991 | FALSE), /* pcrel_offset */ | |
992 | ||
993 | /* LD/ST8: (S+A) & 0xfff */ | |
994 | HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */ | |
995 | 0, /* rightshift */ | |
996 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
997 | 12, /* bitsize */ | |
998 | FALSE, /* pc_relative */ | |
999 | 0, /* bitpos */ | |
1000 | complain_overflow_dont, /* complain_on_overflow */ | |
1001 | bfd_elf_generic_reloc, /* special_function */ | |
1002 | AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */ | |
1003 | FALSE, /* partial_inplace */ | |
1004 | 0xfff, /* src_mask */ | |
1005 | 0xfff, /* dst_mask */ | |
1006 | FALSE), /* pcrel_offset */ | |
1007 | ||
1008 | /* Relocations for control-flow instructions. */ | |
1009 | ||
1010 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ | |
1011 | HOWTO (AARCH64_R (TSTBR14), /* type */ | |
1012 | 2, /* rightshift */ | |
1013 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1014 | 14, /* bitsize */ | |
1015 | TRUE, /* pc_relative */ | |
1016 | 0, /* bitpos */ | |
1017 | complain_overflow_signed, /* complain_on_overflow */ | |
1018 | bfd_elf_generic_reloc, /* special_function */ | |
1019 | AARCH64_R_STR (TSTBR14), /* name */ | |
1020 | FALSE, /* partial_inplace */ | |
1021 | 0x3fff, /* src_mask */ | |
1022 | 0x3fff, /* dst_mask */ | |
1023 | TRUE), /* pcrel_offset */ | |
1024 | ||
1025 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ | |
1026 | HOWTO (AARCH64_R (CONDBR19), /* type */ | |
1027 | 2, /* rightshift */ | |
1028 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1029 | 19, /* bitsize */ | |
1030 | TRUE, /* pc_relative */ | |
1031 | 0, /* bitpos */ | |
1032 | complain_overflow_signed, /* complain_on_overflow */ | |
1033 | bfd_elf_generic_reloc, /* special_function */ | |
1034 | AARCH64_R_STR (CONDBR19), /* name */ | |
1035 | FALSE, /* partial_inplace */ | |
1036 | 0x7ffff, /* src_mask */ | |
1037 | 0x7ffff, /* dst_mask */ | |
1038 | TRUE), /* pcrel_offset */ | |
1039 | ||
1040 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ | |
1041 | HOWTO (AARCH64_R (JUMP26), /* type */ | |
1042 | 2, /* rightshift */ | |
1043 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1044 | 26, /* bitsize */ | |
1045 | TRUE, /* pc_relative */ | |
1046 | 0, /* bitpos */ | |
1047 | complain_overflow_signed, /* complain_on_overflow */ | |
1048 | bfd_elf_generic_reloc, /* special_function */ | |
1049 | AARCH64_R_STR (JUMP26), /* name */ | |
1050 | FALSE, /* partial_inplace */ | |
1051 | 0x3ffffff, /* src_mask */ | |
1052 | 0x3ffffff, /* dst_mask */ | |
1053 | TRUE), /* pcrel_offset */ | |
1054 | ||
1055 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ | |
1056 | HOWTO (AARCH64_R (CALL26), /* type */ | |
1057 | 2, /* rightshift */ | |
1058 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1059 | 26, /* bitsize */ | |
1060 | TRUE, /* pc_relative */ | |
1061 | 0, /* bitpos */ | |
1062 | complain_overflow_signed, /* complain_on_overflow */ | |
1063 | bfd_elf_generic_reloc, /* special_function */ | |
1064 | AARCH64_R_STR (CALL26), /* name */ | |
1065 | FALSE, /* partial_inplace */ | |
1066 | 0x3ffffff, /* src_mask */ | |
1067 | 0x3ffffff, /* dst_mask */ | |
1068 | TRUE), /* pcrel_offset */ | |
1069 | ||
1070 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ | |
1071 | HOWTO64 (MORELLO_R (TSTBR14), /* type */ | |
1072 | 2, /* rightshift */ | |
1073 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1074 | 14, /* bitsize */ | |
1075 | TRUE, /* pc_relative */ | |
1076 | 0, /* bitpos */ | |
1077 | complain_overflow_signed, /* complain_on_overflow */ | |
1078 | bfd_elf_generic_reloc, /* special_function */ | |
1079 | MORELLO_R_STR (TSTBR14), /* name */ | |
1080 | FALSE, /* partial_inplace */ | |
1081 | 0x3fff, /* src_mask */ | |
1082 | 0x3fff, /* dst_mask */ | |
1083 | TRUE), /* pcrel_offset */ | |
1084 | ||
1085 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ | |
1086 | HOWTO64 (MORELLO_R (CONDBR19), /* type */ | |
1087 | 2, /* rightshift */ | |
1088 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1089 | 19, /* bitsize */ | |
1090 | TRUE, /* pc_relative */ | |
1091 | 0, /* bitpos */ | |
1092 | complain_overflow_signed, /* complain_on_overflow */ | |
1093 | bfd_elf_generic_reloc, /* special_function */ | |
1094 | MORELLO_R_STR (CONDBR19), /* name */ | |
1095 | FALSE, /* partial_inplace */ | |
1096 | 0x7ffff, /* src_mask */ | |
1097 | 0x7ffff, /* dst_mask */ | |
1098 | TRUE), /* pcrel_offset */ | |
1099 | ||
1100 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ | |
1101 | HOWTO64 (MORELLO_R (JUMP26), /* type */ | |
1102 | 2, /* rightshift */ | |
1103 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1104 | 26, /* bitsize */ | |
1105 | TRUE, /* pc_relative */ | |
1106 | 0, /* bitpos */ | |
1107 | complain_overflow_signed, /* complain_on_overflow */ | |
1108 | bfd_elf_generic_reloc, /* special_function */ | |
1109 | MORELLO_R_STR (JUMP26), /* name */ | |
1110 | FALSE, /* partial_inplace */ | |
1111 | 0x3ffffff, /* src_mask */ | |
1112 | 0x3ffffff, /* dst_mask */ | |
1113 | TRUE), /* pcrel_offset */ | |
1114 | ||
1115 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ | |
1116 | HOWTO64 (MORELLO_R (CALL26), /* type */ | |
1117 | 2, /* rightshift */ | |
1118 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1119 | 26, /* bitsize */ | |
1120 | TRUE, /* pc_relative */ | |
1121 | 0, /* bitpos */ | |
1122 | complain_overflow_signed, /* complain_on_overflow */ | |
1123 | bfd_elf_generic_reloc, /* special_function */ | |
1124 | MORELLO_R_STR (CALL26), /* name */ | |
1125 | FALSE, /* partial_inplace */ | |
1126 | 0x3ffffff, /* src_mask */ | |
1127 | 0x3ffffff, /* dst_mask */ | |
1128 | TRUE), /* pcrel_offset */ | |
1129 | ||
1130 | /* LD/ST16: (S+A) & 0xffe */ | |
1131 | HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */ | |
1132 | 1, /* rightshift */ | |
1133 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1134 | 12, /* bitsize */ | |
1135 | FALSE, /* pc_relative */ | |
1136 | 0, /* bitpos */ | |
1137 | complain_overflow_dont, /* complain_on_overflow */ | |
1138 | bfd_elf_generic_reloc, /* special_function */ | |
1139 | AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */ | |
1140 | FALSE, /* partial_inplace */ | |
1141 | 0xffe, /* src_mask */ | |
1142 | 0xffe, /* dst_mask */ | |
1143 | FALSE), /* pcrel_offset */ | |
1144 | ||
1145 | /* LD/ST32: (S+A) & 0xffc */ | |
1146 | HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */ | |
1147 | 2, /* rightshift */ | |
1148 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1149 | 12, /* bitsize */ | |
1150 | FALSE, /* pc_relative */ | |
1151 | 0, /* bitpos */ | |
1152 | complain_overflow_dont, /* complain_on_overflow */ | |
1153 | bfd_elf_generic_reloc, /* special_function */ | |
1154 | AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */ | |
1155 | FALSE, /* partial_inplace */ | |
1156 | 0xffc, /* src_mask */ | |
1157 | 0xffc, /* dst_mask */ | |
1158 | FALSE), /* pcrel_offset */ | |
1159 | ||
1160 | /* LD/ST64: (S+A) & 0xff8 */ | |
1161 | HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */ | |
1162 | 3, /* rightshift */ | |
1163 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1164 | 12, /* bitsize */ | |
1165 | FALSE, /* pc_relative */ | |
1166 | 0, /* bitpos */ | |
1167 | complain_overflow_dont, /* complain_on_overflow */ | |
1168 | bfd_elf_generic_reloc, /* special_function */ | |
1169 | AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */ | |
1170 | FALSE, /* partial_inplace */ | |
1171 | 0xff8, /* src_mask */ | |
1172 | 0xff8, /* dst_mask */ | |
1173 | FALSE), /* pcrel_offset */ | |
1174 | ||
1175 | /* LD/ST128: (S+A) & 0xff0 */ | |
1176 | HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */ | |
1177 | 4, /* rightshift */ | |
1178 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1179 | 12, /* bitsize */ | |
1180 | FALSE, /* pc_relative */ | |
1181 | 0, /* bitpos */ | |
1182 | complain_overflow_dont, /* complain_on_overflow */ | |
1183 | bfd_elf_generic_reloc, /* special_function */ | |
1184 | AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */ | |
1185 | FALSE, /* partial_inplace */ | |
1186 | 0xff0, /* src_mask */ | |
1187 | 0xff0, /* dst_mask */ | |
1188 | FALSE), /* pcrel_offset */ | |
1189 | ||
1190 | /* Set a load-literal immediate field to bits | |
1191 | 0x1FFFFC of G(S)-P */ | |
1192 | HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */ | |
1193 | 2, /* rightshift */ | |
1194 | 2, /* size (0 = byte,1 = short,2 = long) */ | |
1195 | 19, /* bitsize */ | |
1196 | TRUE, /* pc_relative */ | |
1197 | 0, /* bitpos */ | |
1198 | complain_overflow_signed, /* complain_on_overflow */ | |
1199 | bfd_elf_generic_reloc, /* special_function */ | |
1200 | AARCH64_R_STR (GOT_LD_PREL19), /* name */ | |
1201 | FALSE, /* partial_inplace */ | |
1202 | 0xffffe0, /* src_mask */ | |
1203 | 0xffffe0, /* dst_mask */ | |
1204 | TRUE), /* pcrel_offset */ | |
1205 | ||
1206 | /* Get to the page for the GOT entry for the symbol | |
1207 | (G(S) - P) using an ADRP instruction. */ | |
1208 | HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */ | |
1209 | 12, /* rightshift */ | |
1210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1211 | 21, /* bitsize */ | |
1212 | TRUE, /* pc_relative */ | |
1213 | 0, /* bitpos */ | |
1214 | complain_overflow_dont, /* complain_on_overflow */ | |
1215 | bfd_elf_generic_reloc, /* special_function */ | |
1216 | AARCH64_R_STR (ADR_GOT_PAGE), /* name */ | |
1217 | FALSE, /* partial_inplace */ | |
1218 | 0x1fffff, /* src_mask */ | |
1219 | 0x1fffff, /* dst_mask */ | |
1220 | TRUE), /* pcrel_offset */ | |
1221 | ||
1222 | /* Get to the page for the GOT entry for the symbol | |
1223 | (G(S) - P) using a C64 ADRP instruction. */ | |
1224 | HOWTO64 (MORELLO_R (ADR_GOT_PAGE), /* type */ | |
1225 | 12, /* rightshift */ | |
1226 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1227 | 20, /* bitsize */ | |
1228 | TRUE, /* pc_relative */ | |
1229 | 0, /* bitpos */ | |
1230 | complain_overflow_dont, /* complain_on_overflow */ | |
1231 | bfd_elf_generic_reloc, /* special_function */ | |
1232 | MORELLO_R_STR (ADR_GOT_PAGE), /* name */ | |
1233 | FALSE, /* partial_inplace */ | |
1234 | 0xfffff, /* src_mask */ | |
1235 | 0xfffff, /* dst_mask */ | |
1236 | TRUE), /* pcrel_offset */ | |
1237 | ||
1238 | /* LD64: GOT offset G(S) & 0xff8 */ | |
1239 | HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */ | |
1240 | 3, /* rightshift */ | |
1241 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1242 | 12, /* bitsize */ | |
1243 | FALSE, /* pc_relative */ | |
1244 | 0, /* bitpos */ | |
1245 | complain_overflow_dont, /* complain_on_overflow */ | |
1246 | bfd_elf_generic_reloc, /* special_function */ | |
1247 | AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */ | |
1248 | FALSE, /* partial_inplace */ | |
1249 | 0xff8, /* src_mask */ | |
1250 | 0xff8, /* dst_mask */ | |
1251 | FALSE), /* pcrel_offset */ | |
1252 | ||
1253 | /* LD128: GOT offset G(S) & 0xff0 */ | |
1254 | HOWTO64 (MORELLO_R (LD128_GOT_LO12_NC), /* type */ | |
1255 | 4, /* rightshift */ | |
1256 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1257 | 12, /* bitsize */ | |
1258 | FALSE, /* pc_relative */ | |
1259 | 0, /* bitpos */ | |
1260 | complain_overflow_dont, /* complain_on_overflow */ | |
1261 | bfd_elf_generic_reloc, /* special_function */ | |
1262 | MORELLO_R_STR (LD128_GOT_LO12_NC), /* name */ | |
1263 | FALSE, /* partial_inplace */ | |
1264 | 0xff0, /* src_mask */ | |
1265 | 0xff0, /* dst_mask */ | |
1266 | FALSE), /* pcrel_offset */ | |
1267 | ||
1268 | /* LD32: GOT offset G(S) & 0xffc */ | |
1269 | HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */ | |
1270 | 2, /* rightshift */ | |
1271 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1272 | 12, /* bitsize */ | |
1273 | FALSE, /* pc_relative */ | |
1274 | 0, /* bitpos */ | |
1275 | complain_overflow_dont, /* complain_on_overflow */ | |
1276 | bfd_elf_generic_reloc, /* special_function */ | |
1277 | AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */ | |
1278 | FALSE, /* partial_inplace */ | |
1279 | 0xffc, /* src_mask */ | |
1280 | 0xffc, /* dst_mask */ | |
1281 | FALSE), /* pcrel_offset */ | |
1282 | ||
1283 | /* Lower 16 bits of GOT offset for the symbol. */ | |
1284 | HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC), /* type */ | |
1285 | 0, /* rightshift */ | |
1286 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1287 | 16, /* bitsize */ | |
1288 | FALSE, /* pc_relative */ | |
1289 | 0, /* bitpos */ | |
1290 | complain_overflow_dont, /* complain_on_overflow */ | |
1291 | bfd_elf_generic_reloc, /* special_function */ | |
1292 | AARCH64_R_STR (MOVW_GOTOFF_G0_NC), /* name */ | |
1293 | FALSE, /* partial_inplace */ | |
1294 | 0xffff, /* src_mask */ | |
1295 | 0xffff, /* dst_mask */ | |
1296 | FALSE), /* pcrel_offset */ | |
1297 | ||
1298 | /* Higher 16 bits of GOT offset for the symbol. */ | |
1299 | HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1), /* type */ | |
1300 | 16, /* rightshift */ | |
1301 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1302 | 16, /* bitsize */ | |
1303 | FALSE, /* pc_relative */ | |
1304 | 0, /* bitpos */ | |
1305 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1306 | bfd_elf_generic_reloc, /* special_function */ | |
1307 | AARCH64_R_STR (MOVW_GOTOFF_G1), /* name */ | |
1308 | FALSE, /* partial_inplace */ | |
1309 | 0xffff, /* src_mask */ | |
1310 | 0xffff, /* dst_mask */ | |
1311 | FALSE), /* pcrel_offset */ | |
1312 | ||
1313 | /* LD64: GOT offset for the symbol. */ | |
1314 | HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */ | |
1315 | 3, /* rightshift */ | |
1316 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1317 | 12, /* bitsize */ | |
1318 | FALSE, /* pc_relative */ | |
1319 | 0, /* bitpos */ | |
1320 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1321 | bfd_elf_generic_reloc, /* special_function */ | |
1322 | AARCH64_R_STR (LD64_GOTOFF_LO15), /* name */ | |
1323 | FALSE, /* partial_inplace */ | |
1324 | 0x7ff8, /* src_mask */ | |
1325 | 0x7ff8, /* dst_mask */ | |
1326 | FALSE), /* pcrel_offset */ | |
1327 | ||
1328 | /* LD32: GOT offset to the page address of GOT table. | |
1329 | (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */ | |
1330 | HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14), /* type */ | |
1331 | 2, /* rightshift */ | |
1332 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1333 | 12, /* bitsize */ | |
1334 | FALSE, /* pc_relative */ | |
1335 | 0, /* bitpos */ | |
1336 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1337 | bfd_elf_generic_reloc, /* special_function */ | |
1338 | AARCH64_R_STR (LD32_GOTPAGE_LO14), /* name */ | |
1339 | FALSE, /* partial_inplace */ | |
1340 | 0x5ffc, /* src_mask */ | |
1341 | 0x5ffc, /* dst_mask */ | |
1342 | FALSE), /* pcrel_offset */ | |
1343 | ||
1344 | /* LD64: GOT offset to the page address of GOT table. | |
1345 | (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */ | |
1346 | HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15), /* type */ | |
1347 | 3, /* rightshift */ | |
1348 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1349 | 12, /* bitsize */ | |
1350 | FALSE, /* pc_relative */ | |
1351 | 0, /* bitpos */ | |
1352 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1353 | bfd_elf_generic_reloc, /* special_function */ | |
1354 | AARCH64_R_STR (LD64_GOTPAGE_LO15), /* name */ | |
1355 | FALSE, /* partial_inplace */ | |
1356 | 0x7ff8, /* src_mask */ | |
1357 | 0x7ff8, /* dst_mask */ | |
1358 | FALSE), /* pcrel_offset */ | |
1359 | ||
1360 | /* Get to the page for the GOT entry for the symbol | |
1361 | (G(S) - P) using an ADRP instruction. */ | |
1362 | HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */ | |
1363 | 12, /* rightshift */ | |
1364 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1365 | 21, /* bitsize */ | |
1366 | TRUE, /* pc_relative */ | |
1367 | 0, /* bitpos */ | |
1368 | complain_overflow_dont, /* complain_on_overflow */ | |
1369 | bfd_elf_generic_reloc, /* special_function */ | |
1370 | AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */ | |
1371 | FALSE, /* partial_inplace */ | |
1372 | 0x1fffff, /* src_mask */ | |
1373 | 0x1fffff, /* dst_mask */ | |
1374 | TRUE), /* pcrel_offset */ | |
1375 | ||
1376 | HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */ | |
1377 | 0, /* rightshift */ | |
1378 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1379 | 21, /* bitsize */ | |
1380 | TRUE, /* pc_relative */ | |
1381 | 0, /* bitpos */ | |
1382 | complain_overflow_dont, /* complain_on_overflow */ | |
1383 | bfd_elf_generic_reloc, /* special_function */ | |
1384 | AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */ | |
1385 | FALSE, /* partial_inplace */ | |
1386 | 0x1fffff, /* src_mask */ | |
1387 | 0x1fffff, /* dst_mask */ | |
1388 | TRUE), /* pcrel_offset */ | |
1389 | ||
1390 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ | |
1391 | HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */ | |
1392 | 0, /* rightshift */ | |
1393 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1394 | 12, /* bitsize */ | |
1395 | FALSE, /* pc_relative */ | |
1396 | 0, /* bitpos */ | |
1397 | complain_overflow_dont, /* complain_on_overflow */ | |
1398 | bfd_elf_generic_reloc, /* special_function */ | |
1399 | AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */ | |
1400 | FALSE, /* partial_inplace */ | |
1401 | 0xfff, /* src_mask */ | |
1402 | 0xfff, /* dst_mask */ | |
1403 | FALSE), /* pcrel_offset */ | |
1404 | ||
1405 | /* Lower 16 bits of GOT offset to tls_index. */ | |
1406 | HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC), /* type */ | |
1407 | 0, /* rightshift */ | |
1408 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1409 | 16, /* bitsize */ | |
1410 | FALSE, /* pc_relative */ | |
1411 | 0, /* bitpos */ | |
1412 | complain_overflow_dont, /* complain_on_overflow */ | |
1413 | bfd_elf_generic_reloc, /* special_function */ | |
1414 | AARCH64_R_STR (TLSGD_MOVW_G0_NC), /* name */ | |
1415 | FALSE, /* partial_inplace */ | |
1416 | 0xffff, /* src_mask */ | |
1417 | 0xffff, /* dst_mask */ | |
1418 | FALSE), /* pcrel_offset */ | |
1419 | ||
1420 | /* Higher 16 bits of GOT offset to tls_index. */ | |
1421 | HOWTO64 (AARCH64_R (TLSGD_MOVW_G1), /* type */ | |
1422 | 16, /* rightshift */ | |
1423 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1424 | 16, /* bitsize */ | |
1425 | FALSE, /* pc_relative */ | |
1426 | 0, /* bitpos */ | |
1427 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1428 | bfd_elf_generic_reloc, /* special_function */ | |
1429 | AARCH64_R_STR (TLSGD_MOVW_G1), /* name */ | |
1430 | FALSE, /* partial_inplace */ | |
1431 | 0xffff, /* src_mask */ | |
1432 | 0xffff, /* dst_mask */ | |
1433 | FALSE), /* pcrel_offset */ | |
1434 | ||
1435 | HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */ | |
1436 | 12, /* rightshift */ | |
1437 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1438 | 21, /* bitsize */ | |
1439 | FALSE, /* pc_relative */ | |
1440 | 0, /* bitpos */ | |
1441 | complain_overflow_dont, /* complain_on_overflow */ | |
1442 | bfd_elf_generic_reloc, /* special_function */ | |
1443 | AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */ | |
1444 | FALSE, /* partial_inplace */ | |
1445 | 0x1fffff, /* src_mask */ | |
1446 | 0x1fffff, /* dst_mask */ | |
1447 | FALSE), /* pcrel_offset */ | |
1448 | ||
1449 | HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */ | |
1450 | 3, /* rightshift */ | |
1451 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1452 | 12, /* bitsize */ | |
1453 | FALSE, /* pc_relative */ | |
1454 | 0, /* bitpos */ | |
1455 | complain_overflow_dont, /* complain_on_overflow */ | |
1456 | bfd_elf_generic_reloc, /* special_function */ | |
1457 | AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */ | |
1458 | FALSE, /* partial_inplace */ | |
1459 | 0xff8, /* src_mask */ | |
1460 | 0xff8, /* dst_mask */ | |
1461 | FALSE), /* pcrel_offset */ | |
1462 | ||
1463 | HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */ | |
1464 | 2, /* rightshift */ | |
1465 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1466 | 12, /* bitsize */ | |
1467 | FALSE, /* pc_relative */ | |
1468 | 0, /* bitpos */ | |
1469 | complain_overflow_dont, /* complain_on_overflow */ | |
1470 | bfd_elf_generic_reloc, /* special_function */ | |
1471 | AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */ | |
1472 | FALSE, /* partial_inplace */ | |
1473 | 0xffc, /* src_mask */ | |
1474 | 0xffc, /* dst_mask */ | |
1475 | FALSE), /* pcrel_offset */ | |
1476 | ||
1477 | HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */ | |
1478 | 2, /* rightshift */ | |
1479 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1480 | 19, /* bitsize */ | |
1481 | FALSE, /* pc_relative */ | |
1482 | 0, /* bitpos */ | |
1483 | complain_overflow_dont, /* complain_on_overflow */ | |
1484 | bfd_elf_generic_reloc, /* special_function */ | |
1485 | AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */ | |
1486 | FALSE, /* partial_inplace */ | |
1487 | 0x1ffffc, /* src_mask */ | |
1488 | 0x1ffffc, /* dst_mask */ | |
1489 | FALSE), /* pcrel_offset */ | |
1490 | ||
1491 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */ | |
1492 | 0, /* rightshift */ | |
1493 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1494 | 16, /* bitsize */ | |
1495 | FALSE, /* pc_relative */ | |
1496 | 0, /* bitpos */ | |
1497 | complain_overflow_dont, /* complain_on_overflow */ | |
1498 | bfd_elf_generic_reloc, /* special_function */ | |
1499 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */ | |
1500 | FALSE, /* partial_inplace */ | |
1501 | 0xffff, /* src_mask */ | |
1502 | 0xffff, /* dst_mask */ | |
1503 | FALSE), /* pcrel_offset */ | |
1504 | ||
1505 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */ | |
1506 | 16, /* rightshift */ | |
1507 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1508 | 16, /* bitsize */ | |
1509 | FALSE, /* pc_relative */ | |
1510 | 0, /* bitpos */ | |
1511 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1512 | bfd_elf_generic_reloc, /* special_function */ | |
1513 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */ | |
1514 | FALSE, /* partial_inplace */ | |
1515 | 0xffff, /* src_mask */ | |
1516 | 0xffff, /* dst_mask */ | |
1517 | FALSE), /* pcrel_offset */ | |
1518 | ||
1519 | /* ADD: bit[23:12] of byte offset to module TLS base address. */ | |
1520 | HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12), /* type */ | |
1521 | 12, /* rightshift */ | |
1522 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1523 | 12, /* bitsize */ | |
1524 | FALSE, /* pc_relative */ | |
1525 | 0, /* bitpos */ | |
1526 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1527 | bfd_elf_generic_reloc, /* special_function */ | |
1528 | AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12), /* name */ | |
1529 | FALSE, /* partial_inplace */ | |
1530 | 0xfff, /* src_mask */ | |
1531 | 0xfff, /* dst_mask */ | |
1532 | FALSE), /* pcrel_offset */ | |
1533 | ||
1534 | /* Unsigned 12 bit byte offset to module TLS base address. */ | |
1535 | HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12), /* type */ | |
1536 | 0, /* rightshift */ | |
1537 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1538 | 12, /* bitsize */ | |
1539 | FALSE, /* pc_relative */ | |
1540 | 0, /* bitpos */ | |
1541 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1542 | bfd_elf_generic_reloc, /* special_function */ | |
1543 | AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12), /* name */ | |
1544 | FALSE, /* partial_inplace */ | |
1545 | 0xfff, /* src_mask */ | |
1546 | 0xfff, /* dst_mask */ | |
1547 | FALSE), /* pcrel_offset */ | |
1548 | ||
1549 | /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */ | |
1550 | HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC), /* type */ | |
1551 | 0, /* rightshift */ | |
1552 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1553 | 12, /* bitsize */ | |
1554 | FALSE, /* pc_relative */ | |
1555 | 0, /* bitpos */ | |
1556 | complain_overflow_dont, /* complain_on_overflow */ | |
1557 | bfd_elf_generic_reloc, /* special_function */ | |
1558 | AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC), /* name */ | |
1559 | FALSE, /* partial_inplace */ | |
1560 | 0xfff, /* src_mask */ | |
1561 | 0xfff, /* dst_mask */ | |
1562 | FALSE), /* pcrel_offset */ | |
1563 | ||
1564 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ | |
1565 | HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */ | |
1566 | 0, /* rightshift */ | |
1567 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1568 | 12, /* bitsize */ | |
1569 | FALSE, /* pc_relative */ | |
1570 | 0, /* bitpos */ | |
1571 | complain_overflow_dont, /* complain_on_overflow */ | |
1572 | bfd_elf_generic_reloc, /* special_function */ | |
1573 | AARCH64_R_STR (TLSLD_ADD_LO12_NC), /* name */ | |
1574 | FALSE, /* partial_inplace */ | |
1575 | 0xfff, /* src_mask */ | |
1576 | 0xfff, /* dst_mask */ | |
1577 | FALSE), /* pcrel_offset */ | |
1578 | ||
1579 | /* Get to the page for the GOT entry for the symbol | |
1580 | (G(S) - P) using an ADRP instruction. */ | |
1581 | HOWTO (AARCH64_R (TLSLD_ADR_PAGE21), /* type */ | |
1582 | 12, /* rightshift */ | |
1583 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1584 | 21, /* bitsize */ | |
1585 | TRUE, /* pc_relative */ | |
1586 | 0, /* bitpos */ | |
1587 | complain_overflow_signed, /* complain_on_overflow */ | |
1588 | bfd_elf_generic_reloc, /* special_function */ | |
1589 | AARCH64_R_STR (TLSLD_ADR_PAGE21), /* name */ | |
1590 | FALSE, /* partial_inplace */ | |
1591 | 0x1fffff, /* src_mask */ | |
1592 | 0x1fffff, /* dst_mask */ | |
1593 | TRUE), /* pcrel_offset */ | |
1594 | ||
1595 | HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */ | |
1596 | 0, /* rightshift */ | |
1597 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1598 | 21, /* bitsize */ | |
1599 | TRUE, /* pc_relative */ | |
1600 | 0, /* bitpos */ | |
1601 | complain_overflow_signed, /* complain_on_overflow */ | |
1602 | bfd_elf_generic_reloc, /* special_function */ | |
1603 | AARCH64_R_STR (TLSLD_ADR_PREL21), /* name */ | |
1604 | FALSE, /* partial_inplace */ | |
1605 | 0x1fffff, /* src_mask */ | |
1606 | 0x1fffff, /* dst_mask */ | |
1607 | TRUE), /* pcrel_offset */ | |
1608 | ||
1609 | /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */ | |
1610 | HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12), /* type */ | |
1611 | 1, /* rightshift */ | |
1612 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1613 | 11, /* bitsize */ | |
1614 | FALSE, /* pc_relative */ | |
1615 | 10, /* bitpos */ | |
1616 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1617 | bfd_elf_generic_reloc, /* special_function */ | |
1618 | AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12), /* name */ | |
1619 | FALSE, /* partial_inplace */ | |
1620 | 0x1ffc00, /* src_mask */ | |
1621 | 0x1ffc00, /* dst_mask */ | |
1622 | FALSE), /* pcrel_offset */ | |
1623 | ||
1624 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */ | |
1625 | HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC), /* type */ | |
1626 | 1, /* rightshift */ | |
1627 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1628 | 11, /* bitsize */ | |
1629 | FALSE, /* pc_relative */ | |
1630 | 10, /* bitpos */ | |
1631 | complain_overflow_dont, /* complain_on_overflow */ | |
1632 | bfd_elf_generic_reloc, /* special_function */ | |
1633 | AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC), /* name */ | |
1634 | FALSE, /* partial_inplace */ | |
1635 | 0x1ffc00, /* src_mask */ | |
1636 | 0x1ffc00, /* dst_mask */ | |
1637 | FALSE), /* pcrel_offset */ | |
1638 | ||
1639 | /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */ | |
1640 | HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12), /* type */ | |
1641 | 2, /* rightshift */ | |
1642 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1643 | 10, /* bitsize */ | |
1644 | FALSE, /* pc_relative */ | |
1645 | 10, /* bitpos */ | |
1646 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1647 | bfd_elf_generic_reloc, /* special_function */ | |
1648 | AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12), /* name */ | |
1649 | FALSE, /* partial_inplace */ | |
1650 | 0x3ffc00, /* src_mask */ | |
1651 | 0x3ffc00, /* dst_mask */ | |
1652 | FALSE), /* pcrel_offset */ | |
1653 | ||
1654 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */ | |
1655 | HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC), /* type */ | |
1656 | 2, /* rightshift */ | |
1657 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1658 | 10, /* bitsize */ | |
1659 | FALSE, /* pc_relative */ | |
1660 | 10, /* bitpos */ | |
1661 | complain_overflow_dont, /* complain_on_overflow */ | |
1662 | bfd_elf_generic_reloc, /* special_function */ | |
1663 | AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC), /* name */ | |
1664 | FALSE, /* partial_inplace */ | |
1665 | 0xffc00, /* src_mask */ | |
1666 | 0xffc00, /* dst_mask */ | |
1667 | FALSE), /* pcrel_offset */ | |
1668 | ||
1669 | /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */ | |
1670 | HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12), /* type */ | |
1671 | 3, /* rightshift */ | |
1672 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1673 | 9, /* bitsize */ | |
1674 | FALSE, /* pc_relative */ | |
1675 | 10, /* bitpos */ | |
1676 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1677 | bfd_elf_generic_reloc, /* special_function */ | |
1678 | AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12), /* name */ | |
1679 | FALSE, /* partial_inplace */ | |
1680 | 0x3ffc00, /* src_mask */ | |
1681 | 0x3ffc00, /* dst_mask */ | |
1682 | FALSE), /* pcrel_offset */ | |
1683 | ||
1684 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */ | |
1685 | HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC), /* type */ | |
1686 | 3, /* rightshift */ | |
1687 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1688 | 9, /* bitsize */ | |
1689 | FALSE, /* pc_relative */ | |
1690 | 10, /* bitpos */ | |
1691 | complain_overflow_dont, /* complain_on_overflow */ | |
1692 | bfd_elf_generic_reloc, /* special_function */ | |
1693 | AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC), /* name */ | |
1694 | FALSE, /* partial_inplace */ | |
1695 | 0x7fc00, /* src_mask */ | |
1696 | 0x7fc00, /* dst_mask */ | |
1697 | FALSE), /* pcrel_offset */ | |
1698 | ||
1699 | /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */ | |
1700 | HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12), /* type */ | |
1701 | 0, /* rightshift */ | |
1702 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1703 | 12, /* bitsize */ | |
1704 | FALSE, /* pc_relative */ | |
1705 | 10, /* bitpos */ | |
1706 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1707 | bfd_elf_generic_reloc, /* special_function */ | |
1708 | AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12), /* name */ | |
1709 | FALSE, /* partial_inplace */ | |
1710 | 0x3ffc00, /* src_mask */ | |
1711 | 0x3ffc00, /* dst_mask */ | |
1712 | FALSE), /* pcrel_offset */ | |
1713 | ||
1714 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */ | |
1715 | HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC), /* type */ | |
1716 | 0, /* rightshift */ | |
1717 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1718 | 12, /* bitsize */ | |
1719 | FALSE, /* pc_relative */ | |
1720 | 10, /* bitpos */ | |
1721 | complain_overflow_dont, /* complain_on_overflow */ | |
1722 | bfd_elf_generic_reloc, /* special_function */ | |
1723 | AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC), /* name */ | |
1724 | FALSE, /* partial_inplace */ | |
1725 | 0x3ffc00, /* src_mask */ | |
1726 | 0x3ffc00, /* dst_mask */ | |
1727 | FALSE), /* pcrel_offset */ | |
1728 | ||
1729 | /* MOVZ: bit[15:0] of byte offset to module TLS base address. */ | |
1730 | HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0), /* type */ | |
1731 | 0, /* rightshift */ | |
1732 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1733 | 16, /* bitsize */ | |
1734 | FALSE, /* pc_relative */ | |
1735 | 0, /* bitpos */ | |
1736 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1737 | bfd_elf_generic_reloc, /* special_function */ | |
1738 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0), /* name */ | |
1739 | FALSE, /* partial_inplace */ | |
1740 | 0xffff, /* src_mask */ | |
1741 | 0xffff, /* dst_mask */ | |
1742 | FALSE), /* pcrel_offset */ | |
1743 | ||
1744 | /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */ | |
1745 | HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC), /* type */ | |
1746 | 0, /* rightshift */ | |
1747 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1748 | 16, /* bitsize */ | |
1749 | FALSE, /* pc_relative */ | |
1750 | 0, /* bitpos */ | |
1751 | complain_overflow_dont, /* complain_on_overflow */ | |
1752 | bfd_elf_generic_reloc, /* special_function */ | |
1753 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC), /* name */ | |
1754 | FALSE, /* partial_inplace */ | |
1755 | 0xffff, /* src_mask */ | |
1756 | 0xffff, /* dst_mask */ | |
1757 | FALSE), /* pcrel_offset */ | |
1758 | ||
1759 | /* MOVZ: bit[31:16] of byte offset to module TLS base address. */ | |
1760 | HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1), /* type */ | |
1761 | 16, /* rightshift */ | |
1762 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1763 | 16, /* bitsize */ | |
1764 | FALSE, /* pc_relative */ | |
1765 | 0, /* bitpos */ | |
1766 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1767 | bfd_elf_generic_reloc, /* special_function */ | |
1768 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1), /* name */ | |
1769 | FALSE, /* partial_inplace */ | |
1770 | 0xffff, /* src_mask */ | |
1771 | 0xffff, /* dst_mask */ | |
1772 | FALSE), /* pcrel_offset */ | |
1773 | ||
1774 | /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */ | |
1775 | HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC), /* type */ | |
1776 | 16, /* rightshift */ | |
1777 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1778 | 16, /* bitsize */ | |
1779 | FALSE, /* pc_relative */ | |
1780 | 0, /* bitpos */ | |
1781 | complain_overflow_dont, /* complain_on_overflow */ | |
1782 | bfd_elf_generic_reloc, /* special_function */ | |
1783 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC), /* name */ | |
1784 | FALSE, /* partial_inplace */ | |
1785 | 0xffff, /* src_mask */ | |
1786 | 0xffff, /* dst_mask */ | |
1787 | FALSE), /* pcrel_offset */ | |
1788 | ||
1789 | /* MOVZ: bit[47:32] of byte offset to module TLS base address. */ | |
1790 | HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2), /* type */ | |
1791 | 32, /* rightshift */ | |
1792 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1793 | 16, /* bitsize */ | |
1794 | FALSE, /* pc_relative */ | |
1795 | 0, /* bitpos */ | |
1796 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1797 | bfd_elf_generic_reloc, /* special_function */ | |
1798 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2), /* name */ | |
1799 | FALSE, /* partial_inplace */ | |
1800 | 0xffff, /* src_mask */ | |
1801 | 0xffff, /* dst_mask */ | |
1802 | FALSE), /* pcrel_offset */ | |
1803 | ||
1804 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */ | |
1805 | 32, /* rightshift */ | |
1806 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1807 | 16, /* bitsize */ | |
1808 | FALSE, /* pc_relative */ | |
1809 | 0, /* bitpos */ | |
1810 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1811 | bfd_elf_generic_reloc, /* special_function */ | |
1812 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */ | |
1813 | FALSE, /* partial_inplace */ | |
1814 | 0xffff, /* src_mask */ | |
1815 | 0xffff, /* dst_mask */ | |
1816 | FALSE), /* pcrel_offset */ | |
1817 | ||
1818 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */ | |
1819 | 16, /* rightshift */ | |
1820 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1821 | 16, /* bitsize */ | |
1822 | FALSE, /* pc_relative */ | |
1823 | 0, /* bitpos */ | |
1824 | complain_overflow_dont, /* complain_on_overflow */ | |
1825 | bfd_elf_generic_reloc, /* special_function */ | |
1826 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */ | |
1827 | FALSE, /* partial_inplace */ | |
1828 | 0xffff, /* src_mask */ | |
1829 | 0xffff, /* dst_mask */ | |
1830 | FALSE), /* pcrel_offset */ | |
1831 | ||
1832 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */ | |
1833 | 16, /* rightshift */ | |
1834 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1835 | 16, /* bitsize */ | |
1836 | FALSE, /* pc_relative */ | |
1837 | 0, /* bitpos */ | |
1838 | complain_overflow_dont, /* complain_on_overflow */ | |
1839 | bfd_elf_generic_reloc, /* special_function */ | |
1840 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */ | |
1841 | FALSE, /* partial_inplace */ | |
1842 | 0xffff, /* src_mask */ | |
1843 | 0xffff, /* dst_mask */ | |
1844 | FALSE), /* pcrel_offset */ | |
1845 | ||
1846 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */ | |
1847 | 0, /* rightshift */ | |
1848 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1849 | 16, /* bitsize */ | |
1850 | FALSE, /* pc_relative */ | |
1851 | 0, /* bitpos */ | |
1852 | complain_overflow_dont, /* complain_on_overflow */ | |
1853 | bfd_elf_generic_reloc, /* special_function */ | |
1854 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */ | |
1855 | FALSE, /* partial_inplace */ | |
1856 | 0xffff, /* src_mask */ | |
1857 | 0xffff, /* dst_mask */ | |
1858 | FALSE), /* pcrel_offset */ | |
1859 | ||
1860 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */ | |
1861 | 0, /* rightshift */ | |
1862 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1863 | 16, /* bitsize */ | |
1864 | FALSE, /* pc_relative */ | |
1865 | 0, /* bitpos */ | |
1866 | complain_overflow_dont, /* complain_on_overflow */ | |
1867 | bfd_elf_generic_reloc, /* special_function */ | |
1868 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */ | |
1869 | FALSE, /* partial_inplace */ | |
1870 | 0xffff, /* src_mask */ | |
1871 | 0xffff, /* dst_mask */ | |
1872 | FALSE), /* pcrel_offset */ | |
1873 | ||
1874 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */ | |
1875 | 12, /* rightshift */ | |
1876 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1877 | 12, /* bitsize */ | |
1878 | FALSE, /* pc_relative */ | |
1879 | 0, /* bitpos */ | |
1880 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1881 | bfd_elf_generic_reloc, /* special_function */ | |
1882 | AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */ | |
1883 | FALSE, /* partial_inplace */ | |
1884 | 0xfff, /* src_mask */ | |
1885 | 0xfff, /* dst_mask */ | |
1886 | FALSE), /* pcrel_offset */ | |
1887 | ||
1888 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */ | |
1889 | 0, /* rightshift */ | |
1890 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1891 | 12, /* bitsize */ | |
1892 | FALSE, /* pc_relative */ | |
1893 | 0, /* bitpos */ | |
1894 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1895 | bfd_elf_generic_reloc, /* special_function */ | |
1896 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */ | |
1897 | FALSE, /* partial_inplace */ | |
1898 | 0xfff, /* src_mask */ | |
1899 | 0xfff, /* dst_mask */ | |
1900 | FALSE), /* pcrel_offset */ | |
1901 | ||
1902 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */ | |
1903 | 0, /* rightshift */ | |
1904 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1905 | 12, /* bitsize */ | |
1906 | FALSE, /* pc_relative */ | |
1907 | 0, /* bitpos */ | |
1908 | complain_overflow_dont, /* complain_on_overflow */ | |
1909 | bfd_elf_generic_reloc, /* special_function */ | |
1910 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */ | |
1911 | FALSE, /* partial_inplace */ | |
1912 | 0xfff, /* src_mask */ | |
1913 | 0xfff, /* dst_mask */ | |
1914 | FALSE), /* pcrel_offset */ | |
1915 | ||
1916 | /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */ | |
1917 | HOWTO (AARCH64_R (TLSLE_LDST16_TPREL_LO12), /* type */ | |
1918 | 1, /* rightshift */ | |
1919 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1920 | 11, /* bitsize */ | |
1921 | FALSE, /* pc_relative */ | |
1922 | 10, /* bitpos */ | |
1923 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1924 | bfd_elf_generic_reloc, /* special_function */ | |
1925 | AARCH64_R_STR (TLSLE_LDST16_TPREL_LO12), /* name */ | |
1926 | FALSE, /* partial_inplace */ | |
1927 | 0x1ffc00, /* src_mask */ | |
1928 | 0x1ffc00, /* dst_mask */ | |
1929 | FALSE), /* pcrel_offset */ | |
1930 | ||
1931 | /* Same as BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12, but no overflow check. */ | |
1932 | HOWTO (AARCH64_R (TLSLE_LDST16_TPREL_LO12_NC), /* type */ | |
1933 | 1, /* rightshift */ | |
1934 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1935 | 11, /* bitsize */ | |
1936 | FALSE, /* pc_relative */ | |
1937 | 10, /* bitpos */ | |
1938 | complain_overflow_dont, /* complain_on_overflow */ | |
1939 | bfd_elf_generic_reloc, /* special_function */ | |
1940 | AARCH64_R_STR (TLSLE_LDST16_TPREL_LO12_NC), /* name */ | |
1941 | FALSE, /* partial_inplace */ | |
1942 | 0x1ffc00, /* src_mask */ | |
1943 | 0x1ffc00, /* dst_mask */ | |
1944 | FALSE), /* pcrel_offset */ | |
1945 | ||
1946 | /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */ | |
1947 | HOWTO (AARCH64_R (TLSLE_LDST32_TPREL_LO12), /* type */ | |
1948 | 2, /* rightshift */ | |
1949 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1950 | 10, /* bitsize */ | |
1951 | FALSE, /* pc_relative */ | |
1952 | 10, /* bitpos */ | |
1953 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1954 | bfd_elf_generic_reloc, /* special_function */ | |
1955 | AARCH64_R_STR (TLSLE_LDST32_TPREL_LO12), /* name */ | |
1956 | FALSE, /* partial_inplace */ | |
1957 | 0xffc00, /* src_mask */ | |
1958 | 0xffc00, /* dst_mask */ | |
1959 | FALSE), /* pcrel_offset */ | |
1960 | ||
1961 | /* Same as BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12, but no overflow check. */ | |
1962 | HOWTO (AARCH64_R (TLSLE_LDST32_TPREL_LO12_NC), /* type */ | |
1963 | 2, /* rightshift */ | |
1964 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1965 | 10, /* bitsize */ | |
1966 | FALSE, /* pc_relative */ | |
1967 | 10, /* bitpos */ | |
1968 | complain_overflow_dont, /* complain_on_overflow */ | |
1969 | bfd_elf_generic_reloc, /* special_function */ | |
1970 | AARCH64_R_STR (TLSLE_LDST32_TPREL_LO12_NC), /* name */ | |
1971 | FALSE, /* partial_inplace */ | |
1972 | 0xffc00, /* src_mask */ | |
1973 | 0xffc00, /* dst_mask */ | |
1974 | FALSE), /* pcrel_offset */ | |
1975 | ||
1976 | /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */ | |
1977 | HOWTO (AARCH64_R (TLSLE_LDST64_TPREL_LO12), /* type */ | |
1978 | 3, /* rightshift */ | |
1979 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1980 | 9, /* bitsize */ | |
1981 | FALSE, /* pc_relative */ | |
1982 | 10, /* bitpos */ | |
1983 | complain_overflow_unsigned, /* complain_on_overflow */ | |
1984 | bfd_elf_generic_reloc, /* special_function */ | |
1985 | AARCH64_R_STR (TLSLE_LDST64_TPREL_LO12), /* name */ | |
1986 | FALSE, /* partial_inplace */ | |
1987 | 0x7fc00, /* src_mask */ | |
1988 | 0x7fc00, /* dst_mask */ | |
1989 | FALSE), /* pcrel_offset */ | |
1990 | ||
1991 | /* Same as BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12, but no overflow check. */ | |
1992 | HOWTO (AARCH64_R (TLSLE_LDST64_TPREL_LO12_NC), /* type */ | |
1993 | 3, /* rightshift */ | |
1994 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1995 | 9, /* bitsize */ | |
1996 | FALSE, /* pc_relative */ | |
1997 | 10, /* bitpos */ | |
1998 | complain_overflow_dont, /* complain_on_overflow */ | |
1999 | bfd_elf_generic_reloc, /* special_function */ | |
2000 | AARCH64_R_STR (TLSLE_LDST64_TPREL_LO12_NC), /* name */ | |
2001 | FALSE, /* partial_inplace */ | |
2002 | 0x7fc00, /* src_mask */ | |
2003 | 0x7fc00, /* dst_mask */ | |
2004 | FALSE), /* pcrel_offset */ | |
2005 | ||
2006 | /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */ | |
2007 | HOWTO (AARCH64_R (TLSLE_LDST8_TPREL_LO12), /* type */ | |
2008 | 0, /* rightshift */ | |
2009 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2010 | 12, /* bitsize */ | |
2011 | FALSE, /* pc_relative */ | |
2012 | 10, /* bitpos */ | |
2013 | complain_overflow_unsigned, /* complain_on_overflow */ | |
2014 | bfd_elf_generic_reloc, /* special_function */ | |
2015 | AARCH64_R_STR (TLSLE_LDST8_TPREL_LO12), /* name */ | |
2016 | FALSE, /* partial_inplace */ | |
2017 | 0x3ffc00, /* src_mask */ | |
2018 | 0x3ffc00, /* dst_mask */ | |
2019 | FALSE), /* pcrel_offset */ | |
2020 | ||
2021 | /* Same as BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12, but no overflow check. */ | |
2022 | HOWTO (AARCH64_R (TLSLE_LDST8_TPREL_LO12_NC), /* type */ | |
2023 | 0, /* rightshift */ | |
2024 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2025 | 12, /* bitsize */ | |
2026 | FALSE, /* pc_relative */ | |
2027 | 10, /* bitpos */ | |
2028 | complain_overflow_dont, /* complain_on_overflow */ | |
2029 | bfd_elf_generic_reloc, /* special_function */ | |
2030 | AARCH64_R_STR (TLSLE_LDST8_TPREL_LO12_NC), /* name */ | |
2031 | FALSE, /* partial_inplace */ | |
2032 | 0x3ffc00, /* src_mask */ | |
2033 | 0x3ffc00, /* dst_mask */ | |
2034 | FALSE), /* pcrel_offset */ | |
2035 | ||
2036 | HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */ | |
2037 | 2, /* rightshift */ | |
2038 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2039 | 19, /* bitsize */ | |
2040 | TRUE, /* pc_relative */ | |
2041 | 0, /* bitpos */ | |
2042 | complain_overflow_dont, /* complain_on_overflow */ | |
2043 | bfd_elf_generic_reloc, /* special_function */ | |
2044 | AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */ | |
2045 | FALSE, /* partial_inplace */ | |
2046 | 0x0ffffe0, /* src_mask */ | |
2047 | 0x0ffffe0, /* dst_mask */ | |
2048 | TRUE), /* pcrel_offset */ | |
2049 | ||
2050 | HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */ | |
2051 | 0, /* rightshift */ | |
2052 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2053 | 21, /* bitsize */ | |
2054 | TRUE, /* pc_relative */ | |
2055 | 0, /* bitpos */ | |
2056 | complain_overflow_dont, /* complain_on_overflow */ | |
2057 | bfd_elf_generic_reloc, /* special_function */ | |
2058 | AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */ | |
2059 | FALSE, /* partial_inplace */ | |
2060 | 0x1fffff, /* src_mask */ | |
2061 | 0x1fffff, /* dst_mask */ | |
2062 | TRUE), /* pcrel_offset */ | |
2063 | ||
2064 | /* Get to the page for the GOT entry for the symbol | |
2065 | (G(S) - P) using an ADRP instruction. */ | |
2066 | HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */ | |
2067 | 12, /* rightshift */ | |
2068 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2069 | 21, /* bitsize */ | |
2070 | TRUE, /* pc_relative */ | |
2071 | 0, /* bitpos */ | |
2072 | complain_overflow_dont, /* complain_on_overflow */ | |
2073 | bfd_elf_generic_reloc, /* special_function */ | |
2074 | AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */ | |
2075 | FALSE, /* partial_inplace */ | |
2076 | 0x1fffff, /* src_mask */ | |
2077 | 0x1fffff, /* dst_mask */ | |
2078 | TRUE), /* pcrel_offset */ | |
2079 | ||
2080 | /* LD64: GOT offset G(S) & 0xff8. */ | |
2081 | HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12), /* type */ | |
2082 | 3, /* rightshift */ | |
2083 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2084 | 12, /* bitsize */ | |
2085 | FALSE, /* pc_relative */ | |
2086 | 0, /* bitpos */ | |
2087 | complain_overflow_dont, /* complain_on_overflow */ | |
2088 | bfd_elf_generic_reloc, /* special_function */ | |
2089 | AARCH64_R_STR (TLSDESC_LD64_LO12), /* name */ | |
2090 | FALSE, /* partial_inplace */ | |
2091 | 0xff8, /* src_mask */ | |
2092 | 0xff8, /* dst_mask */ | |
2093 | FALSE), /* pcrel_offset */ | |
2094 | ||
2095 | /* LD32: GOT offset G(S) & 0xffc. */ | |
2096 | HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */ | |
2097 | 2, /* rightshift */ | |
2098 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2099 | 12, /* bitsize */ | |
2100 | FALSE, /* pc_relative */ | |
2101 | 0, /* bitpos */ | |
2102 | complain_overflow_dont, /* complain_on_overflow */ | |
2103 | bfd_elf_generic_reloc, /* special_function */ | |
2104 | AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */ | |
2105 | FALSE, /* partial_inplace */ | |
2106 | 0xffc, /* src_mask */ | |
2107 | 0xffc, /* dst_mask */ | |
2108 | FALSE), /* pcrel_offset */ | |
2109 | ||
2110 | /* ADD: GOT offset G(S) & 0xfff. */ | |
2111 | HOWTO (AARCH64_R (TLSDESC_ADD_LO12), /* type */ | |
2112 | 0, /* rightshift */ | |
2113 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2114 | 12, /* bitsize */ | |
2115 | FALSE, /* pc_relative */ | |
2116 | 0, /* bitpos */ | |
2117 | complain_overflow_dont,/* complain_on_overflow */ | |
2118 | bfd_elf_generic_reloc, /* special_function */ | |
2119 | AARCH64_R_STR (TLSDESC_ADD_LO12), /* name */ | |
2120 | FALSE, /* partial_inplace */ | |
2121 | 0xfff, /* src_mask */ | |
2122 | 0xfff, /* dst_mask */ | |
2123 | FALSE), /* pcrel_offset */ | |
2124 | ||
2125 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */ | |
2126 | 16, /* rightshift */ | |
2127 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2128 | 12, /* bitsize */ | |
2129 | FALSE, /* pc_relative */ | |
2130 | 0, /* bitpos */ | |
2131 | complain_overflow_unsigned, /* complain_on_overflow */ | |
2132 | bfd_elf_generic_reloc, /* special_function */ | |
2133 | AARCH64_R_STR (TLSDESC_OFF_G1), /* name */ | |
2134 | FALSE, /* partial_inplace */ | |
2135 | 0xffff, /* src_mask */ | |
2136 | 0xffff, /* dst_mask */ | |
2137 | FALSE), /* pcrel_offset */ | |
2138 | ||
2139 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */ | |
2140 | 0, /* rightshift */ | |
2141 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2142 | 12, /* bitsize */ | |
2143 | FALSE, /* pc_relative */ | |
2144 | 0, /* bitpos */ | |
2145 | complain_overflow_dont, /* complain_on_overflow */ | |
2146 | bfd_elf_generic_reloc, /* special_function */ | |
2147 | AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */ | |
2148 | FALSE, /* partial_inplace */ | |
2149 | 0xffff, /* src_mask */ | |
2150 | 0xffff, /* dst_mask */ | |
2151 | FALSE), /* pcrel_offset */ | |
2152 | ||
2153 | HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */ | |
2154 | 0, /* rightshift */ | |
2155 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2156 | 12, /* bitsize */ | |
2157 | FALSE, /* pc_relative */ | |
2158 | 0, /* bitpos */ | |
2159 | complain_overflow_dont, /* complain_on_overflow */ | |
2160 | bfd_elf_generic_reloc, /* special_function */ | |
2161 | AARCH64_R_STR (TLSDESC_LDR), /* name */ | |
2162 | FALSE, /* partial_inplace */ | |
2163 | 0x0, /* src_mask */ | |
2164 | 0x0, /* dst_mask */ | |
2165 | FALSE), /* pcrel_offset */ | |
2166 | ||
2167 | HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */ | |
2168 | 0, /* rightshift */ | |
2169 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2170 | 12, /* bitsize */ | |
2171 | FALSE, /* pc_relative */ | |
2172 | 0, /* bitpos */ | |
2173 | complain_overflow_dont, /* complain_on_overflow */ | |
2174 | bfd_elf_generic_reloc, /* special_function */ | |
2175 | AARCH64_R_STR (TLSDESC_ADD), /* name */ | |
2176 | FALSE, /* partial_inplace */ | |
2177 | 0x0, /* src_mask */ | |
2178 | 0x0, /* dst_mask */ | |
2179 | FALSE), /* pcrel_offset */ | |
2180 | ||
2181 | HOWTO (AARCH64_R (TLSDESC_CALL), /* type */ | |
2182 | 0, /* rightshift */ | |
2183 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2184 | 0, /* bitsize */ | |
2185 | FALSE, /* pc_relative */ | |
2186 | 0, /* bitpos */ | |
2187 | complain_overflow_dont, /* complain_on_overflow */ | |
2188 | bfd_elf_generic_reloc, /* special_function */ | |
2189 | AARCH64_R_STR (TLSDESC_CALL), /* name */ | |
2190 | FALSE, /* partial_inplace */ | |
2191 | 0x0, /* src_mask */ | |
2192 | 0x0, /* dst_mask */ | |
2193 | FALSE), /* pcrel_offset */ | |
2194 | ||
2195 | /* Get to the page for the GOT entry for the symbol | |
2196 | (G(S) - P) using an ADRP instruction. */ | |
2197 | HOWTO64 (MORELLO_R (TLSDESC_ADR_PAGE20), /* type */ | |
2198 | 12, /* rightshift */ | |
2199 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2200 | 20, /* bitsize */ | |
2201 | TRUE, /* pc_relative */ | |
2202 | 0, /* bitpos */ | |
2203 | complain_overflow_dont, /* complain_on_overflow */ | |
2204 | bfd_elf_generic_reloc, /* special_function */ | |
2205 | MORELLO_R_STR (TLSDESC_ADR_PAGE20), /* name */ | |
2206 | FALSE, /* partial_inplace */ | |
2207 | 0xfffff, /* src_mask */ | |
2208 | 0xfffff, /* dst_mask */ | |
2209 | TRUE), /* pcrel_offset */ | |
2210 | ||
2211 | /* LD128: GOT offset G(S) & 0xff0. */ | |
2212 | HOWTO64 (MORELLO_R (TLSDESC_LD128_LO12), /* type */ | |
2213 | 4, /* rightshift */ | |
2214 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2215 | 12, /* bitsize */ | |
2216 | FALSE, /* pc_relative */ | |
2217 | 0, /* bitpos */ | |
2218 | complain_overflow_dont, /* complain_on_overflow */ | |
2219 | bfd_elf_generic_reloc, /* special_function */ | |
2220 | MORELLO_R_STR (TLSDESC_LD128_LO12), /* name */ | |
2221 | FALSE, /* partial_inplace */ | |
2222 | 0xff0, /* src_mask */ | |
2223 | 0xff0, /* dst_mask */ | |
2224 | FALSE), /* pcrel_offset */ | |
2225 | ||
2226 | HOWTO64 (MORELLO_R (TLSDESC_CALL), /* type */ | |
2227 | 0, /* rightshift */ | |
2228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2229 | 0, /* bitsize */ | |
2230 | FALSE, /* pc_relative */ | |
2231 | 0, /* bitpos */ | |
2232 | complain_overflow_dont, /* complain_on_overflow */ | |
2233 | bfd_elf_generic_reloc, /* special_function */ | |
2234 | MORELLO_R_STR (TLSDESC_CALL), /* name */ | |
2235 | FALSE, /* partial_inplace */ | |
2236 | 0x0, /* src_mask */ | |
2237 | 0x0, /* dst_mask */ | |
2238 | FALSE), /* pcrel_offset */ | |
2239 | ||
2240 | HOWTO (AARCH64_R (COPY), /* type */ | |
2241 | 0, /* rightshift */ | |
2242 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2243 | 64, /* bitsize */ | |
2244 | FALSE, /* pc_relative */ | |
2245 | 0, /* bitpos */ | |
2246 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2247 | bfd_elf_generic_reloc, /* special_function */ | |
2248 | AARCH64_R_STR (COPY), /* name */ | |
2249 | TRUE, /* partial_inplace */ | |
2250 | 0xffffffff, /* src_mask */ | |
2251 | 0xffffffff, /* dst_mask */ | |
2252 | FALSE), /* pcrel_offset */ | |
2253 | ||
2254 | HOWTO (AARCH64_R (GLOB_DAT), /* type */ | |
2255 | 0, /* rightshift */ | |
2256 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2257 | 64, /* bitsize */ | |
2258 | FALSE, /* pc_relative */ | |
2259 | 0, /* bitpos */ | |
2260 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2261 | bfd_elf_generic_reloc, /* special_function */ | |
2262 | AARCH64_R_STR (GLOB_DAT), /* name */ | |
2263 | TRUE, /* partial_inplace */ | |
2264 | 0xffffffff, /* src_mask */ | |
2265 | 0xffffffff, /* dst_mask */ | |
2266 | FALSE), /* pcrel_offset */ | |
2267 | ||
2268 | HOWTO (AARCH64_R (JUMP_SLOT), /* type */ | |
2269 | 0, /* rightshift */ | |
2270 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2271 | 64, /* bitsize */ | |
2272 | FALSE, /* pc_relative */ | |
2273 | 0, /* bitpos */ | |
2274 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2275 | bfd_elf_generic_reloc, /* special_function */ | |
2276 | AARCH64_R_STR (JUMP_SLOT), /* name */ | |
2277 | TRUE, /* partial_inplace */ | |
2278 | 0xffffffff, /* src_mask */ | |
2279 | 0xffffffff, /* dst_mask */ | |
2280 | FALSE), /* pcrel_offset */ | |
2281 | ||
2282 | HOWTO (AARCH64_R (RELATIVE), /* type */ | |
2283 | 0, /* rightshift */ | |
2284 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2285 | 64, /* bitsize */ | |
2286 | FALSE, /* pc_relative */ | |
2287 | 0, /* bitpos */ | |
2288 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2289 | bfd_elf_generic_reloc, /* special_function */ | |
2290 | AARCH64_R_STR (RELATIVE), /* name */ | |
2291 | TRUE, /* partial_inplace */ | |
2292 | ALL_ONES, /* src_mask */ | |
2293 | ALL_ONES, /* dst_mask */ | |
2294 | FALSE), /* pcrel_offset */ | |
2295 | ||
2296 | HOWTO (AARCH64_R (TLS_DTPMOD), /* type */ | |
2297 | 0, /* rightshift */ | |
2298 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2299 | 64, /* bitsize */ | |
2300 | FALSE, /* pc_relative */ | |
2301 | 0, /* bitpos */ | |
2302 | complain_overflow_dont, /* complain_on_overflow */ | |
2303 | bfd_elf_generic_reloc, /* special_function */ | |
2304 | #if ARCH_SIZE == 64 | |
2305 | AARCH64_R_STR (TLS_DTPMOD64), /* name */ | |
2306 | #else | |
2307 | AARCH64_R_STR (TLS_DTPMOD), /* name */ | |
2308 | #endif | |
2309 | FALSE, /* partial_inplace */ | |
2310 | 0, /* src_mask */ | |
2311 | ALL_ONES, /* dst_mask */ | |
2312 | FALSE), /* pc_reloffset */ | |
2313 | ||
2314 | HOWTO (AARCH64_R (TLS_DTPREL), /* type */ | |
2315 | 0, /* rightshift */ | |
2316 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2317 | 64, /* bitsize */ | |
2318 | FALSE, /* pc_relative */ | |
2319 | 0, /* bitpos */ | |
2320 | complain_overflow_dont, /* complain_on_overflow */ | |
2321 | bfd_elf_generic_reloc, /* special_function */ | |
2322 | #if ARCH_SIZE == 64 | |
2323 | AARCH64_R_STR (TLS_DTPREL64), /* name */ | |
2324 | #else | |
2325 | AARCH64_R_STR (TLS_DTPREL), /* name */ | |
2326 | #endif | |
2327 | FALSE, /* partial_inplace */ | |
2328 | 0, /* src_mask */ | |
2329 | ALL_ONES, /* dst_mask */ | |
2330 | FALSE), /* pcrel_offset */ | |
2331 | ||
2332 | HOWTO (AARCH64_R (TLS_TPREL), /* type */ | |
2333 | 0, /* rightshift */ | |
2334 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2335 | 64, /* bitsize */ | |
2336 | FALSE, /* pc_relative */ | |
2337 | 0, /* bitpos */ | |
2338 | complain_overflow_dont, /* complain_on_overflow */ | |
2339 | bfd_elf_generic_reloc, /* special_function */ | |
2340 | #if ARCH_SIZE == 64 | |
2341 | AARCH64_R_STR (TLS_TPREL64), /* name */ | |
2342 | #else | |
2343 | AARCH64_R_STR (TLS_TPREL), /* name */ | |
2344 | #endif | |
2345 | FALSE, /* partial_inplace */ | |
2346 | 0, /* src_mask */ | |
2347 | ALL_ONES, /* dst_mask */ | |
2348 | FALSE), /* pcrel_offset */ | |
2349 | ||
2350 | HOWTO (AARCH64_R (TLSDESC), /* type */ | |
2351 | 0, /* rightshift */ | |
2352 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2353 | 64, /* bitsize */ | |
2354 | FALSE, /* pc_relative */ | |
2355 | 0, /* bitpos */ | |
2356 | complain_overflow_dont, /* complain_on_overflow */ | |
2357 | bfd_elf_generic_reloc, /* special_function */ | |
2358 | AARCH64_R_STR (TLSDESC), /* name */ | |
2359 | FALSE, /* partial_inplace */ | |
2360 | 0, /* src_mask */ | |
2361 | ALL_ONES, /* dst_mask */ | |
2362 | FALSE), /* pcrel_offset */ | |
2363 | ||
2364 | HOWTO (AARCH64_R (IRELATIVE), /* type */ | |
2365 | 0, /* rightshift */ | |
2366 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2367 | 64, /* bitsize */ | |
2368 | FALSE, /* pc_relative */ | |
2369 | 0, /* bitpos */ | |
2370 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2371 | bfd_elf_generic_reloc, /* special_function */ | |
2372 | AARCH64_R_STR (IRELATIVE), /* name */ | |
2373 | FALSE, /* partial_inplace */ | |
2374 | 0, /* src_mask */ | |
2375 | ALL_ONES, /* dst_mask */ | |
2376 | FALSE), /* pcrel_offset */ | |
2377 | ||
2378 | HOWTO64 (MORELLO_R (CAPINIT), /* type */ | |
2379 | 0, /* rightshift */ | |
2380 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
2381 | 0, /* bitsize */ | |
2382 | FALSE, /* pc_relative */ | |
2383 | 0, /* bitpos */ | |
2384 | complain_overflow_dont, /* complain_on_overflow */ | |
2385 | bfd_elf_generic_reloc, /* special_function */ | |
2386 | MORELLO_R_STR (CAPINIT), /* name */ | |
2387 | FALSE, /* partial_inplace */ | |
2388 | ALL_ONES, /* src_mask */ | |
2389 | ALL_ONES, /* dst_mask */ | |
2390 | FALSE), /* pcrel_offset */ | |
2391 | ||
2392 | HOWTO64 (MORELLO_R (GLOB_DAT),/* type */ | |
2393 | 0, /* rightshift */ | |
2394 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2395 | 64, /* bitsize */ | |
2396 | FALSE, /* pc_relative */ | |
2397 | 0, /* bitpos */ | |
2398 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2399 | bfd_elf_generic_reloc, /* special_function */ | |
2400 | MORELLO_R_STR (GLOB_DAT), /* name */ | |
2401 | TRUE, /* partial_inplace */ | |
2402 | 0xffffffff, /* src_mask */ | |
2403 | 0xffffffff, /* dst_mask */ | |
2404 | FALSE), /* pcrel_offset */ | |
2405 | ||
2406 | HOWTO64 (MORELLO_R (JUMP_SLOT), /* type */ | |
2407 | 0, /* rightshift */ | |
2408 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2409 | 64, /* bitsize */ | |
2410 | FALSE, /* pc_relative */ | |
2411 | 0, /* bitpos */ | |
2412 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2413 | bfd_elf_generic_reloc, /* special_function */ | |
2414 | MORELLO_R_STR (JUMP_SLOT), /* name */ | |
2415 | TRUE, /* partial_inplace */ | |
2416 | 0xffffffff, /* src_mask */ | |
2417 | 0xffffffff, /* dst_mask */ | |
2418 | FALSE), /* pcrel_offset */ | |
2419 | ||
2420 | HOWTO64 (MORELLO_R (RELATIVE), /* type */ | |
2421 | 0, /* rightshift */ | |
2422 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2423 | 64, /* bitsize */ | |
2424 | FALSE, /* pc_relative */ | |
2425 | 0, /* bitpos */ | |
2426 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2427 | bfd_elf_generic_reloc, /* special_function */ | |
2428 | MORELLO_R_STR (RELATIVE), /* name */ | |
2429 | TRUE, /* partial_inplace */ | |
2430 | ALL_ONES, /* src_mask */ | |
2431 | ALL_ONES, /* dst_mask */ | |
2432 | FALSE), /* pcrel_offset */ | |
2433 | ||
2434 | HOWTO64 (MORELLO_R (IRELATIVE), /* type */ | |
2435 | 0, /* rightshift */ | |
2436 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2437 | 64, /* bitsize */ | |
2438 | FALSE, /* pc_relative */ | |
2439 | 0, /* bitpos */ | |
2440 | complain_overflow_bitfield, /* complain_on_overflow */ | |
2441 | bfd_elf_generic_reloc, /* special_function */ | |
2442 | MORELLO_R_STR (IRELATIVE), /* name */ | |
2443 | FALSE, /* partial_inplace */ | |
2444 | 0, /* src_mask */ | |
2445 | ALL_ONES, /* dst_mask */ | |
2446 | FALSE), /* pcrel_offset */ | |
2447 | ||
2448 | HOWTO64 (MORELLO_R (TLSDESC), /* type */ | |
2449 | 0, /* rightshift */ | |
2450 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
2451 | 64, /* bitsize */ | |
2452 | FALSE, /* pc_relative */ | |
2453 | 0, /* bitpos */ | |
2454 | complain_overflow_dont, /* complain_on_overflow */ | |
2455 | bfd_elf_generic_reloc, /* special_function */ | |
2456 | MORELLO_R_STR (TLSDESC), /* name */ | |
2457 | FALSE, /* partial_inplace */ | |
2458 | 0, /* src_mask */ | |
2459 | ALL_ONES, /* dst_mask */ | |
2460 | FALSE), /* pcrel_offset */ | |
2461 | ||
2462 | EMPTY_HOWTO (0), | |
2463 | }; | |
2464 | ||
2465 | static reloc_howto_type elfNN_aarch64_howto_none = | |
2466 | HOWTO (R_AARCH64_NONE, /* type */ | |
2467 | 0, /* rightshift */ | |
2468 | 3, /* size (0 = byte, 1 = short, 2 = long) */ | |
2469 | 0, /* bitsize */ | |
2470 | FALSE, /* pc_relative */ | |
2471 | 0, /* bitpos */ | |
2472 | complain_overflow_dont,/* complain_on_overflow */ | |
2473 | bfd_elf_generic_reloc, /* special_function */ | |
2474 | "R_AARCH64_NONE", /* name */ | |
2475 | FALSE, /* partial_inplace */ | |
2476 | 0, /* src_mask */ | |
2477 | 0, /* dst_mask */ | |
2478 | FALSE); /* pcrel_offset */ | |
2479 | ||
2480 | /* Given HOWTO, return the bfd internal relocation enumerator. */ | |
2481 | ||
2482 | static bfd_reloc_code_real_type | |
2483 | elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto) | |
2484 | { | |
2485 | const int size | |
2486 | = (int) ARRAY_SIZE (elfNN_aarch64_howto_table); | |
2487 | const ptrdiff_t offset | |
2488 | = howto - elfNN_aarch64_howto_table; | |
2489 | ||
2490 | if (offset > 0 && offset < size - 1) | |
2491 | return BFD_RELOC_AARCH64_RELOC_START + offset; | |
2492 | ||
2493 | if (howto == &elfNN_aarch64_howto_none) | |
2494 | return BFD_RELOC_AARCH64_NONE; | |
2495 | ||
2496 | return BFD_RELOC_AARCH64_RELOC_START; | |
2497 | } | |
2498 | ||
2499 | /* Given R_TYPE, return the bfd internal relocation enumerator. */ | |
2500 | ||
2501 | static bfd_reloc_code_real_type | |
2502 | elfNN_aarch64_bfd_reloc_from_type (bfd *abfd, unsigned int r_type) | |
2503 | { | |
2504 | static bfd_boolean initialized_p = FALSE; | |
2505 | /* Indexed by R_TYPE, values are offsets in the howto_table. */ | |
2506 | static unsigned int offsets[R_AARCH64_end]; | |
2507 | ||
2508 | if (!initialized_p) | |
2509 | { | |
2510 | unsigned int i; | |
2511 | ||
2512 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) | |
2513 | if (elfNN_aarch64_howto_table[i].type != 0) | |
2514 | offsets[elfNN_aarch64_howto_table[i].type] = i; | |
2515 | ||
2516 | initialized_p = TRUE; | |
2517 | } | |
2518 | ||
2519 | if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL) | |
2520 | return BFD_RELOC_AARCH64_NONE; | |
2521 | ||
2522 | /* PR 17512: file: b371e70a. */ | |
2523 | if (r_type >= R_AARCH64_end) | |
2524 | { | |
2525 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
2526 | abfd, r_type); | |
2527 | bfd_set_error (bfd_error_bad_value); | |
2528 | return BFD_RELOC_AARCH64_NONE; | |
2529 | } | |
2530 | ||
2531 | return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type]; | |
2532 | } | |
2533 | ||
2534 | struct elf_aarch64_reloc_map | |
2535 | { | |
2536 | bfd_reloc_code_real_type from; | |
2537 | bfd_reloc_code_real_type to; | |
2538 | }; | |
2539 | ||
2540 | /* Map bfd generic reloc to AArch64-specific reloc. */ | |
2541 | static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] = | |
2542 | { | |
2543 | {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE}, | |
2544 | ||
2545 | /* Basic data relocations. */ | |
2546 | {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN}, | |
2547 | {BFD_RELOC_64, BFD_RELOC_AARCH64_64}, | |
2548 | {BFD_RELOC_32, BFD_RELOC_AARCH64_32}, | |
2549 | {BFD_RELOC_16, BFD_RELOC_AARCH64_16}, | |
2550 | {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL}, | |
2551 | {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL}, | |
2552 | {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL}, | |
2553 | }; | |
2554 | ||
2555 | /* Given the bfd internal relocation enumerator in CODE, return the | |
2556 | corresponding howto entry. */ | |
2557 | ||
2558 | static reloc_howto_type * | |
2559 | elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code) | |
2560 | { | |
2561 | unsigned int i; | |
2562 | ||
2563 | /* Convert bfd generic reloc to AArch64-specific reloc. */ | |
2564 | if (code < BFD_RELOC_AARCH64_RELOC_START | |
2565 | || code > BFD_RELOC_AARCH64_RELOC_END) | |
2566 | for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++) | |
2567 | if (elf_aarch64_reloc_map[i].from == code) | |
2568 | { | |
2569 | code = elf_aarch64_reloc_map[i].to; | |
2570 | break; | |
2571 | } | |
2572 | ||
2573 | if (code > BFD_RELOC_AARCH64_RELOC_START | |
2574 | && code < BFD_RELOC_AARCH64_RELOC_END) | |
2575 | if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type) | |
2576 | return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START]; | |
2577 | ||
2578 | if (code == BFD_RELOC_AARCH64_NONE) | |
2579 | return &elfNN_aarch64_howto_none; | |
2580 | ||
2581 | return NULL; | |
2582 | } | |
2583 | ||
2584 | static reloc_howto_type * | |
2585 | elfNN_aarch64_howto_from_type (bfd *abfd, unsigned int r_type) | |
2586 | { | |
2587 | bfd_reloc_code_real_type val; | |
2588 | reloc_howto_type *howto; | |
2589 | ||
2590 | #if ARCH_SIZE == 32 | |
2591 | if (r_type > 256) | |
2592 | { | |
2593 | bfd_set_error (bfd_error_bad_value); | |
2594 | return NULL; | |
2595 | } | |
2596 | #endif | |
2597 | ||
2598 | if (r_type == R_AARCH64_NONE) | |
2599 | return &elfNN_aarch64_howto_none; | |
2600 | ||
2601 | val = elfNN_aarch64_bfd_reloc_from_type (abfd, r_type); | |
2602 | howto = elfNN_aarch64_howto_from_bfd_reloc (val); | |
2603 | ||
2604 | if (howto != NULL) | |
2605 | return howto; | |
2606 | ||
2607 | bfd_set_error (bfd_error_bad_value); | |
2608 | return NULL; | |
2609 | } | |
2610 | ||
2611 | static bfd_boolean | |
2612 | elfNN_aarch64_info_to_howto (bfd *abfd, arelent *bfd_reloc, | |
2613 | Elf_Internal_Rela *elf_reloc) | |
2614 | { | |
2615 | unsigned int r_type; | |
2616 | ||
2617 | r_type = ELFNN_R_TYPE (elf_reloc->r_info); | |
2618 | bfd_reloc->howto = elfNN_aarch64_howto_from_type (abfd, r_type); | |
2619 | ||
2620 | if (bfd_reloc->howto == NULL) | |
2621 | { | |
2622 | /* xgettext:c-format */ | |
2623 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type); | |
2624 | return FALSE; | |
2625 | } | |
2626 | return TRUE; | |
2627 | } | |
2628 | ||
2629 | static reloc_howto_type * | |
2630 | elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
2631 | bfd_reloc_code_real_type code) | |
2632 | { | |
2633 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code); | |
2634 | ||
2635 | if (howto != NULL) | |
2636 | return howto; | |
2637 | ||
2638 | bfd_set_error (bfd_error_bad_value); | |
2639 | return NULL; | |
2640 | } | |
2641 | ||
2642 | static reloc_howto_type * | |
2643 | elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
2644 | const char *r_name) | |
2645 | { | |
2646 | unsigned int i; | |
2647 | ||
2648 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) | |
2649 | if (elfNN_aarch64_howto_table[i].name != NULL | |
2650 | && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0) | |
2651 | return &elfNN_aarch64_howto_table[i]; | |
2652 | ||
2653 | return NULL; | |
2654 | } | |
2655 | ||
2656 | #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec | |
2657 | #define TARGET_LITTLE_NAME "elfNN-littleaarch64" | |
2658 | #define TARGET_BIG_SYM aarch64_elfNN_be_vec | |
2659 | #define TARGET_BIG_NAME "elfNN-bigaarch64" | |
2660 | ||
2661 | /* The linker script knows the section names for placement. | |
2662 | The entry_names are used to do simple name mangling on the stubs. | |
2663 | Given a function name, and its type, the stub can be found. The | |
2664 | name can be changed. The only requirement is the %s be present. */ | |
2665 | #define STUB_ENTRY_NAME "__%s%s_veneer" | |
2666 | ||
2667 | /* The name of the dynamic interpreter. This is put in the .interp | |
2668 | section. */ | |
2669 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
2670 | ||
2671 | #define AARCH64_MAX_FWD_BRANCH_OFFSET \ | |
2672 | (((1 << 25) - 1) << 2) | |
2673 | #define AARCH64_MAX_BWD_BRANCH_OFFSET \ | |
2674 | (-((1 << 25) << 2)) | |
2675 | ||
2676 | #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) | |
2677 | #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) | |
2678 | ||
2679 | #define C64_MAX_ADRP_IMM ((1 << 19) - 1) | |
2680 | #define C64_MIN_ADRP_IMM (-(1 << 19)) | |
2681 | ||
2682 | static bfd_boolean | |
2683 | aarch64_branch_reloc_p (unsigned int r_type) | |
2684 | { | |
2685 | switch (r_type) | |
2686 | { | |
2687 | case MORELLO_R (JUMP26): | |
2688 | case MORELLO_R (CALL26): | |
2689 | case AARCH64_R (JUMP26): | |
2690 | case AARCH64_R (CALL26): | |
2691 | return TRUE; | |
2692 | ||
2693 | default: break; | |
2694 | } | |
2695 | ||
2696 | return FALSE; | |
2697 | } | |
2698 | ||
2699 | static int | |
2700 | aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) | |
2701 | { | |
2702 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; | |
2703 | return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; | |
2704 | } | |
2705 | ||
2706 | static bfd_boolean | |
2707 | c64_valid_for_adrp_p (bfd_vma value, bfd_vma place) | |
2708 | { | |
2709 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; | |
2710 | return offset <= C64_MAX_ADRP_IMM && offset >= C64_MIN_ADRP_IMM; | |
2711 | } | |
2712 | ||
2713 | static int | |
2714 | aarch64_valid_branch_p (bfd_vma value, bfd_vma place) | |
2715 | { | |
2716 | bfd_signed_vma offset = (bfd_signed_vma) (value - place); | |
2717 | return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET | |
2718 | && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); | |
2719 | } | |
2720 | ||
2721 | static const uint32_t aarch64_adrp_branch_stub [] = | |
2722 | { | |
2723 | 0x90000010, /* adrp ip0, X */ | |
2724 | /* R_AARCH64_ADR_HI21_PCREL(X) */ | |
2725 | 0x91000210, /* add ip0, ip0, :lo12:X */ | |
2726 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ | |
2727 | 0xd61f0200, /* br ip0 */ | |
2728 | }; | |
2729 | ||
2730 | static const uint32_t aarch64_long_branch_stub[] = | |
2731 | { | |
2732 | #if ARCH_SIZE == 64 | |
2733 | 0x58000090, /* ldr ip0, 1f */ | |
2734 | #else | |
2735 | 0x18000090, /* ldr wip0, 1f */ | |
2736 | #endif | |
2737 | 0x10000011, /* adr ip1, #0 */ | |
2738 | 0x8b110210, /* add ip0, ip0, ip1 */ | |
2739 | 0xd61f0200, /* br ip0 */ | |
2740 | 0x00000000, /* 1: .xword or .word | |
2741 | R_AARCH64_PRELNN(X) + 12 | |
2742 | */ | |
2743 | 0x00000000, | |
2744 | }; | |
2745 | ||
2746 | static const uint32_t aarch64_erratum_835769_stub[] = | |
2747 | { | |
2748 | 0x00000000, /* Placeholder for multiply accumulate. */ | |
2749 | 0x14000000, /* b <label> */ | |
2750 | }; | |
2751 | ||
2752 | static const uint32_t aarch64_erratum_843419_stub[] = | |
2753 | { | |
2754 | 0x00000000, /* Placeholder for LDR instruction. */ | |
2755 | 0x14000000, /* b <label> */ | |
2756 | }; | |
2757 | ||
2758 | static const uint32_t aarch64_c64_branch_stub [] = | |
2759 | { | |
2760 | 0xc2c273e0, /* bx #4 */ | |
2761 | 0x90800010, /* adrp c16, X */ | |
2762 | /* R_MORELLO_ADR_HI20_PCREL(X) */ | |
2763 | 0x02000210, /* add c16, c16, :lo12:X */ | |
2764 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ | |
2765 | 0xc2c21200, /* br c16 */ | |
2766 | }; | |
2767 | ||
2768 | static const uint32_t c64_aarch64_branch_stub [] = | |
2769 | { | |
2770 | 0x90800010, /* adrp c16, X */ | |
2771 | /* R_MORELLO_ADR_HI20_PCREL(X) */ | |
2772 | 0x02000210, /* add c16, c16, :lo12:X */ | |
2773 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ | |
2774 | 0xc2c21200, /* br c16 */ | |
2775 | }; | |
2776 | ||
2777 | /* Section name for stubs is the associated section name plus this | |
2778 | string. */ | |
2779 | #define STUB_SUFFIX ".stub" | |
2780 | ||
2781 | enum elf_aarch64_stub_type | |
2782 | { | |
2783 | aarch64_stub_none, | |
2784 | aarch64_stub_adrp_branch, | |
2785 | aarch64_stub_long_branch, | |
2786 | aarch64_stub_erratum_835769_veneer, | |
2787 | aarch64_stub_erratum_843419_veneer, | |
2788 | aarch64_stub_branch_c64, | |
2789 | c64_stub_branch_aarch64, | |
2790 | c64_stub_branch_c64, | |
2791 | }; | |
2792 | ||
2793 | struct elf_aarch64_stub_hash_entry | |
2794 | { | |
2795 | /* Base hash table entry structure. */ | |
2796 | struct bfd_hash_entry root; | |
2797 | ||
2798 | /* The stub section. */ | |
2799 | asection *stub_sec; | |
2800 | ||
2801 | /* Offset within stub_sec of the beginning of this stub. */ | |
2802 | bfd_vma stub_offset; | |
2803 | ||
2804 | /* Given the symbol's value and its section we can determine its final | |
2805 | value when building the stubs (so the stub knows where to jump). */ | |
2806 | bfd_vma target_value; | |
2807 | asection *target_section; | |
2808 | ||
2809 | enum elf_aarch64_stub_type stub_type; | |
2810 | ||
2811 | /* The symbol table entry, if any, that this was derived from. */ | |
2812 | struct elf_aarch64_link_hash_entry *h; | |
2813 | ||
2814 | /* Destination symbol type */ | |
2815 | unsigned char st_type; | |
2816 | ||
2817 | /* Where this stub is being called from, or, in the case of combined | |
2818 | stub sections, the first input section in the group. */ | |
2819 | asection *id_sec; | |
2820 | ||
2821 | /* The name for the local symbol at the start of this stub. The | |
2822 | stub name in the hash table has to be unique; this does not, so | |
2823 | it can be friendlier. */ | |
2824 | char *output_name; | |
2825 | ||
2826 | /* The instruction which caused this stub to be generated (only valid for | |
2827 | erratum 835769 workaround stubs at present). */ | |
2828 | uint32_t veneered_insn; | |
2829 | ||
2830 | /* In an erratum 843419 workaround stub, the ADRP instruction offset. */ | |
2831 | bfd_vma adrp_offset; | |
2832 | }; | |
2833 | ||
2834 | /* Used to build a map of a section. This is required for mixed-endian | |
2835 | code/data. */ | |
2836 | ||
2837 | typedef struct elf_elf_section_map | |
2838 | { | |
2839 | bfd_vma vma; | |
2840 | char type; | |
2841 | } | |
2842 | elf_aarch64_section_map; | |
2843 | ||
2844 | ||
2845 | typedef struct _aarch64_elf_section_data | |
2846 | { | |
2847 | struct bfd_elf_section_data elf; | |
2848 | unsigned int mapcount; | |
2849 | unsigned int mapsize; | |
2850 | elf_aarch64_section_map *map; | |
2851 | bfd_boolean sorted; | |
2852 | } | |
2853 | _aarch64_elf_section_data; | |
2854 | ||
2855 | #define elf_aarch64_section_data(sec) \ | |
2856 | ((_aarch64_elf_section_data *) elf_section_data (sec)) | |
2857 | ||
2858 | /* Used to order a list of mapping symbols by address. */ | |
2859 | ||
2860 | static int | |
2861 | elf_aarch64_compare_mapping (const void *a, const void *b) | |
2862 | { | |
2863 | const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a; | |
2864 | const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b; | |
2865 | ||
2866 | if (amap->vma > bmap->vma) | |
2867 | return 1; | |
2868 | else if (amap->vma < bmap->vma) | |
2869 | return -1; | |
2870 | else if (amap->type > bmap->type) | |
2871 | /* Ensure results do not depend on the host qsort for objects with | |
2872 | multiple mapping symbols at the same address by sorting on type | |
2873 | after vma. */ | |
2874 | return 1; | |
2875 | else if (amap->type < bmap->type) | |
2876 | return -1; | |
2877 | else | |
2878 | return 0; | |
2879 | } | |
2880 | ||
2881 | static _aarch64_elf_section_data * | |
2882 | elf_aarch64_section_data_get (asection *sec) | |
2883 | { | |
2884 | _aarch64_elf_section_data *sec_data = elf_aarch64_section_data(sec); | |
2885 | ||
2886 | /* A section that does not have aarch64 section data, so it does not have any | |
2887 | map information. Assume A64. */ | |
2888 | if (sec_data == NULL || !sec_data->elf.is_target_section_data) | |
2889 | return NULL; | |
2890 | ||
2891 | if (sec_data->sorted) | |
2892 | goto done; | |
2893 | ||
2894 | qsort (sec_data->map, sec_data->mapcount, sizeof (elf_aarch64_section_map), | |
2895 | elf_aarch64_compare_mapping); | |
2896 | ||
2897 | sec_data->sorted = TRUE; | |
2898 | ||
2899 | done: | |
2900 | return sec_data; | |
2901 | } | |
2902 | ||
2903 | /* Returns TRUE if the label with st_value as VALUE is within a C64 code | |
2904 | section or not. */ | |
2905 | ||
2906 | static bfd_boolean | |
2907 | c64_value_p (asection *section, unsigned int value) | |
2908 | { | |
2909 | struct _aarch64_elf_section_data *sec_data = | |
2910 | elf_aarch64_section_data_get (section); | |
2911 | ||
2912 | if (sec_data == NULL) | |
2913 | return FALSE; | |
2914 | ||
2915 | unsigned int span; | |
2916 | ||
2917 | for (span = 0; span < sec_data->mapcount; span++) | |
2918 | { | |
2919 | unsigned int span_start = sec_data->map[span].vma; | |
2920 | unsigned int span_end = ((span == sec_data->mapcount - 1) | |
2921 | ? sec_data->map[0].vma + section->size | |
2922 | : sec_data->map[span + 1].vma); | |
2923 | char span_type = sec_data->map[span].type; | |
2924 | ||
2925 | if (span_start <= value && value < span_end && span_type == 'c') | |
2926 | return TRUE; | |
2927 | } | |
2928 | return FALSE; | |
2929 | } | |
2930 | ||
2931 | /* The size of the thread control block which is defined to be two pointers. */ | |
2932 | #define TCB_SIZE (ARCH_SIZE/8)*2 | |
2933 | ||
2934 | struct elf_aarch64_local_symbol | |
2935 | { | |
2936 | unsigned int got_type; | |
2937 | bfd_signed_vma got_refcount; | |
2938 | bfd_vma got_offset; | |
2939 | ||
2940 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The | |
2941 | offset is from the end of the jump table and reserved entries | |
2942 | within the PLTGOT. | |
2943 | ||
2944 | The magic value (bfd_vma) -1 indicates that an offset has not be | |
2945 | allocated. */ | |
2946 | bfd_vma tlsdesc_got_jump_table_offset; | |
2947 | }; | |
2948 | ||
2949 | struct elf_aarch64_obj_tdata | |
2950 | { | |
2951 | struct elf_obj_tdata root; | |
2952 | ||
2953 | /* local symbol descriptors */ | |
2954 | struct elf_aarch64_local_symbol *locals; | |
2955 | ||
2956 | /* Zero to warn when linking objects with incompatible enum sizes. */ | |
2957 | int no_enum_size_warning; | |
2958 | ||
2959 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ | |
2960 | int no_wchar_size_warning; | |
2961 | ||
2962 | /* All GNU_PROPERTY_AARCH64_FEATURE_1_AND properties. */ | |
2963 | uint32_t gnu_and_prop; | |
2964 | ||
2965 | /* Zero to warn when linking objects with incompatible | |
2966 | GNU_PROPERTY_AARCH64_FEATURE_1_BTI. */ | |
2967 | int no_bti_warn; | |
2968 | ||
2969 | /* PLT type based on security. */ | |
2970 | aarch64_plt_type plt_type; | |
2971 | ||
2972 | /* Flag to check if section maps have been initialised for all sections in | |
2973 | this object. */ | |
2974 | bfd_boolean secmaps_initialised; | |
2975 | }; | |
2976 | ||
2977 | #define elf_aarch64_tdata(bfd) \ | |
2978 | ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) | |
2979 | ||
2980 | #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) | |
2981 | ||
2982 | #define is_aarch64_elf(bfd) \ | |
2983 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
2984 | && elf_tdata (bfd) != NULL \ | |
2985 | && elf_object_id (bfd) == AARCH64_ELF_DATA) | |
2986 | ||
2987 | static bfd_boolean | |
2988 | elfNN_aarch64_mkobject (bfd *abfd) | |
2989 | { | |
2990 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), | |
2991 | AARCH64_ELF_DATA); | |
2992 | } | |
2993 | ||
2994 | #define elf_aarch64_hash_entry(ent) \ | |
2995 | ((struct elf_aarch64_link_hash_entry *)(ent)) | |
2996 | ||
2997 | #define GOT_UNKNOWN 0 | |
2998 | #define GOT_NORMAL 1 | |
2999 | #define GOT_TLS_GD 2 | |
3000 | #define GOT_TLS_IE 4 | |
3001 | #define GOT_TLSDESC_GD 8 | |
3002 | #define GOT_CAP 16 | |
3003 | ||
3004 | #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) | |
3005 | ||
3006 | /* AArch64 ELF linker hash entry. */ | |
3007 | struct elf_aarch64_link_hash_entry | |
3008 | { | |
3009 | struct elf_link_hash_entry root; | |
3010 | ||
3011 | /* Since PLT entries have variable size, we need to record the | |
3012 | index into .got.plt instead of recomputing it from the PLT | |
3013 | offset. */ | |
3014 | bfd_signed_vma plt_got_offset; | |
3015 | ||
3016 | /* Bit mask representing the type of GOT entry(s) if any required by | |
3017 | this symbol. */ | |
3018 | unsigned int got_type; | |
3019 | ||
3020 | /* A pointer to the most recently used stub hash entry against this | |
3021 | symbol. */ | |
3022 | struct elf_aarch64_stub_hash_entry *stub_cache; | |
3023 | ||
3024 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset | |
3025 | is from the end of the jump table and reserved entries within the PLTGOT. | |
3026 | ||
3027 | The magic value (bfd_vma) -1 indicates that an offset has not | |
3028 | be allocated. */ | |
3029 | bfd_vma tlsdesc_got_jump_table_offset; | |
3030 | }; | |
3031 | ||
3032 | static unsigned int | |
3033 | elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h, | |
3034 | bfd *abfd, | |
3035 | unsigned long r_symndx) | |
3036 | { | |
3037 | if (h) | |
3038 | return elf_aarch64_hash_entry (h)->got_type; | |
3039 | ||
3040 | if (! elf_aarch64_locals (abfd)) | |
3041 | return GOT_UNKNOWN; | |
3042 | ||
3043 | return elf_aarch64_locals (abfd)[r_symndx].got_type; | |
3044 | } | |
3045 | ||
3046 | /* Get the AArch64 elf linker hash table from a link_info structure. */ | |
3047 | #define elf_aarch64_hash_table(info) \ | |
3048 | ((struct elf_aarch64_link_hash_table *) ((info)->hash)) | |
3049 | ||
3050 | #define aarch64_stub_hash_lookup(table, string, create, copy) \ | |
3051 | ((struct elf_aarch64_stub_hash_entry *) \ | |
3052 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
3053 | ||
3054 | /* AArch64 ELF linker hash table. */ | |
3055 | struct elf_aarch64_link_hash_table | |
3056 | { | |
3057 | /* The main hash table. */ | |
3058 | struct elf_link_hash_table root; | |
3059 | ||
3060 | /* Nonzero to force PIC branch veneers. */ | |
3061 | int pic_veneer; | |
3062 | ||
3063 | /* Fix erratum 835769. */ | |
3064 | int fix_erratum_835769; | |
3065 | ||
3066 | /* Fix erratum 843419. */ | |
3067 | erratum_84319_opts fix_erratum_843419; | |
3068 | ||
3069 | /* Don't apply link-time values for dynamic relocations. */ | |
3070 | int no_apply_dynamic_relocs; | |
3071 | ||
3072 | /* The number of bytes in the initial entry in the PLT. */ | |
3073 | bfd_size_type plt_header_size; | |
3074 | ||
3075 | /* The bytes of the initial PLT entry. */ | |
3076 | const bfd_byte *plt0_entry; | |
3077 | ||
3078 | /* The number of bytes in the subsequent PLT entries. */ | |
3079 | bfd_size_type plt_entry_size; | |
3080 | ||
3081 | /* The bytes of the subsequent PLT entry. */ | |
3082 | const bfd_byte *plt_entry; | |
3083 | ||
3084 | /* For convenience in allocate_dynrelocs. */ | |
3085 | bfd *obfd; | |
3086 | ||
3087 | /* The amount of space used by the reserved portion of the sgotplt | |
3088 | section, plus whatever space is used by the jump slots. */ | |
3089 | bfd_vma sgotplt_jump_table_size; | |
3090 | ||
3091 | /* The stub hash table. */ | |
3092 | struct bfd_hash_table stub_hash_table; | |
3093 | ||
3094 | /* Linker stub bfd. */ | |
3095 | bfd *stub_bfd; | |
3096 | ||
3097 | /* Linker call-backs. */ | |
3098 | asection *(*add_stub_section) (const char *, asection *); | |
3099 | void (*layout_sections_again) (void); | |
3100 | ||
3101 | /* Array to keep track of which stub sections have been created, and | |
3102 | information on stub grouping. */ | |
3103 | struct map_stub | |
3104 | { | |
3105 | /* This is the section to which stubs in the group will be | |
3106 | attached. */ | |
3107 | asection *link_sec; | |
3108 | /* The stub section. */ | |
3109 | asection *stub_sec; | |
3110 | } *stub_group; | |
3111 | ||
3112 | /* Assorted information used by elfNN_aarch64_size_stubs. */ | |
3113 | unsigned int bfd_count; | |
3114 | unsigned int top_index; | |
3115 | asection **input_list; | |
3116 | ||
3117 | /* JUMP_SLOT relocs for variant PCS symbols may be present. */ | |
3118 | int variant_pcs; | |
3119 | ||
3120 | /* The number of bytes in the PLT enty for the TLS descriptor. */ | |
3121 | bfd_size_type tlsdesc_plt_entry_size; | |
3122 | ||
3123 | /* Used by local STT_GNU_IFUNC symbols. */ | |
3124 | htab_t loc_hash_table; | |
3125 | void * loc_hash_memory; | |
3126 | ||
3127 | /* Used for capability relocations. */ | |
3128 | asection *srelcaps; | |
3129 | int c64_rel; | |
3130 | bfd_boolean c64_output; | |
3131 | }; | |
3132 | ||
3133 | /* Create an entry in an AArch64 ELF linker hash table. */ | |
3134 | ||
3135 | static struct bfd_hash_entry * | |
3136 | elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, | |
3137 | struct bfd_hash_table *table, | |
3138 | const char *string) | |
3139 | { | |
3140 | struct elf_aarch64_link_hash_entry *ret = | |
3141 | (struct elf_aarch64_link_hash_entry *) entry; | |
3142 | ||
3143 | /* Allocate the structure if it has not already been allocated by a | |
3144 | subclass. */ | |
3145 | if (ret == NULL) | |
3146 | ret = bfd_hash_allocate (table, | |
3147 | sizeof (struct elf_aarch64_link_hash_entry)); | |
3148 | if (ret == NULL) | |
3149 | return (struct bfd_hash_entry *) ret; | |
3150 | ||
3151 | /* Call the allocation method of the superclass. */ | |
3152 | ret = ((struct elf_aarch64_link_hash_entry *) | |
3153 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
3154 | table, string)); | |
3155 | if (ret != NULL) | |
3156 | { | |
3157 | ret->got_type = GOT_UNKNOWN; | |
3158 | ret->plt_got_offset = (bfd_vma) - 1; | |
3159 | ret->stub_cache = NULL; | |
3160 | ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
3161 | } | |
3162 | ||
3163 | return (struct bfd_hash_entry *) ret; | |
3164 | } | |
3165 | ||
3166 | /* Initialize an entry in the stub hash table. */ | |
3167 | ||
3168 | static struct bfd_hash_entry * | |
3169 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
3170 | struct bfd_hash_table *table, const char *string) | |
3171 | { | |
3172 | /* Allocate the structure if it has not already been allocated by a | |
3173 | subclass. */ | |
3174 | if (entry == NULL) | |
3175 | { | |
3176 | entry = bfd_hash_allocate (table, | |
3177 | sizeof (struct | |
3178 | elf_aarch64_stub_hash_entry)); | |
3179 | if (entry == NULL) | |
3180 | return entry; | |
3181 | } | |
3182 | ||
3183 | /* Call the allocation method of the superclass. */ | |
3184 | entry = bfd_hash_newfunc (entry, table, string); | |
3185 | if (entry != NULL) | |
3186 | { | |
3187 | struct elf_aarch64_stub_hash_entry *eh; | |
3188 | ||
3189 | /* Initialize the local fields. */ | |
3190 | eh = (struct elf_aarch64_stub_hash_entry *) entry; | |
3191 | eh->adrp_offset = 0; | |
3192 | eh->stub_sec = NULL; | |
3193 | eh->stub_offset = 0; | |
3194 | eh->target_value = 0; | |
3195 | eh->target_section = NULL; | |
3196 | eh->stub_type = aarch64_stub_none; | |
3197 | eh->h = NULL; | |
3198 | eh->id_sec = NULL; | |
3199 | } | |
3200 | ||
3201 | return entry; | |
3202 | } | |
3203 | ||
3204 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry | |
3205 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
3206 | as global symbol. We reuse indx and dynstr_index for local symbol | |
3207 | hash since they aren't used by global symbols in this backend. */ | |
3208 | ||
3209 | static hashval_t | |
3210 | elfNN_aarch64_local_htab_hash (const void *ptr) | |
3211 | { | |
3212 | struct elf_link_hash_entry *h | |
3213 | = (struct elf_link_hash_entry *) ptr; | |
3214 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
3215 | } | |
3216 | ||
3217 | /* Compare local hash entries. */ | |
3218 | ||
3219 | static int | |
3220 | elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2) | |
3221 | { | |
3222 | struct elf_link_hash_entry *h1 | |
3223 | = (struct elf_link_hash_entry *) ptr1; | |
3224 | struct elf_link_hash_entry *h2 | |
3225 | = (struct elf_link_hash_entry *) ptr2; | |
3226 | ||
3227 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
3228 | } | |
3229 | ||
3230 | /* Find and/or create a hash entry for local symbol. */ | |
3231 | ||
3232 | static struct elf_link_hash_entry * | |
3233 | elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab, | |
3234 | bfd *abfd, const Elf_Internal_Rela *rel, | |
3235 | bfd_boolean create) | |
3236 | { | |
3237 | struct elf_aarch64_link_hash_entry e, *ret; | |
3238 | asection *sec = abfd->sections; | |
3239 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, | |
3240 | ELFNN_R_SYM (rel->r_info)); | |
3241 | void **slot; | |
3242 | ||
3243 | e.root.indx = sec->id; | |
3244 | e.root.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
3245 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
3246 | create ? INSERT : NO_INSERT); | |
3247 | ||
3248 | if (!slot) | |
3249 | return NULL; | |
3250 | ||
3251 | if (*slot) | |
3252 | { | |
3253 | ret = (struct elf_aarch64_link_hash_entry *) *slot; | |
3254 | return &ret->root; | |
3255 | } | |
3256 | ||
3257 | ret = (struct elf_aarch64_link_hash_entry *) | |
3258 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
3259 | sizeof (struct elf_aarch64_link_hash_entry)); | |
3260 | if (ret) | |
3261 | { | |
3262 | memset (ret, 0, sizeof (*ret)); | |
3263 | ret->root.indx = sec->id; | |
3264 | ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
3265 | ret->root.dynindx = -1; | |
3266 | *slot = ret; | |
3267 | } | |
3268 | return &ret->root; | |
3269 | } | |
3270 | ||
3271 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
3272 | ||
3273 | static void | |
3274 | elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info, | |
3275 | struct elf_link_hash_entry *dir, | |
3276 | struct elf_link_hash_entry *ind) | |
3277 | { | |
3278 | struct elf_aarch64_link_hash_entry *edir, *eind; | |
3279 | ||
3280 | edir = (struct elf_aarch64_link_hash_entry *) dir; | |
3281 | eind = (struct elf_aarch64_link_hash_entry *) ind; | |
3282 | ||
3283 | if (ind->root.type == bfd_link_hash_indirect) | |
3284 | { | |
3285 | /* Copy over PLT info. */ | |
3286 | if (dir->got.refcount <= 0) | |
3287 | { | |
3288 | edir->got_type = eind->got_type; | |
3289 | eind->got_type = GOT_UNKNOWN; | |
3290 | } | |
3291 | } | |
3292 | ||
3293 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
3294 | } | |
3295 | ||
3296 | /* Merge non-visibility st_other attributes. */ | |
3297 | ||
3298 | static void | |
3299 | elfNN_aarch64_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
3300 | const Elf_Internal_Sym *isym, | |
3301 | bfd_boolean definition ATTRIBUTE_UNUSED, | |
3302 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
3303 | { | |
3304 | unsigned int isym_sto = isym->st_other & ~ELF_ST_VISIBILITY (-1); | |
3305 | unsigned int h_sto = h->other & ~ELF_ST_VISIBILITY (-1); | |
3306 | ||
3307 | if (isym_sto == h_sto) | |
3308 | return; | |
3309 | ||
3310 | if (isym_sto & ~STO_AARCH64_VARIANT_PCS) | |
3311 | /* Not fatal, this callback cannot fail. */ | |
3312 | _bfd_error_handler (_("unknown attribute for symbol `%s': 0x%02x"), | |
3313 | h->root.root.string, isym_sto); | |
3314 | ||
3315 | /* Note: Ideally we would warn about any attribute mismatch, but | |
3316 | this api does not allow that without substantial changes. */ | |
3317 | if (isym_sto & STO_AARCH64_VARIANT_PCS) | |
3318 | h->other |= STO_AARCH64_VARIANT_PCS; | |
3319 | } | |
3320 | ||
3321 | /* Destroy an AArch64 elf linker hash table. */ | |
3322 | ||
3323 | static void | |
3324 | elfNN_aarch64_link_hash_table_free (bfd *obfd) | |
3325 | { | |
3326 | struct elf_aarch64_link_hash_table *ret | |
3327 | = (struct elf_aarch64_link_hash_table *) obfd->link.hash; | |
3328 | ||
3329 | if (ret->loc_hash_table) | |
3330 | htab_delete (ret->loc_hash_table); | |
3331 | if (ret->loc_hash_memory) | |
3332 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); | |
3333 | ||
3334 | bfd_hash_table_free (&ret->stub_hash_table); | |
3335 | _bfd_elf_link_hash_table_free (obfd); | |
3336 | } | |
3337 | ||
3338 | /* Create an AArch64 elf linker hash table. */ | |
3339 | ||
3340 | static struct bfd_link_hash_table * | |
3341 | elfNN_aarch64_link_hash_table_create (bfd *abfd) | |
3342 | { | |
3343 | struct elf_aarch64_link_hash_table *ret; | |
3344 | size_t amt = sizeof (struct elf_aarch64_link_hash_table); | |
3345 | ||
3346 | ret = bfd_zmalloc (amt); | |
3347 | if (ret == NULL) | |
3348 | return NULL; | |
3349 | ||
3350 | if (!_bfd_elf_link_hash_table_init | |
3351 | (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc, | |
3352 | sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA)) | |
3353 | { | |
3354 | free (ret); | |
3355 | return NULL; | |
3356 | } | |
3357 | ||
3358 | ret->plt_header_size = PLT_ENTRY_SIZE; | |
3359 | ret->plt0_entry = elfNN_aarch64_small_plt0_entry; | |
3360 | ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; | |
3361 | ret->plt_entry = elfNN_aarch64_small_plt_entry; | |
3362 | ret->tlsdesc_plt_entry_size = PLT_TLSDESC_ENTRY_SIZE; | |
3363 | ret->obfd = abfd; | |
3364 | ret->root.tlsdesc_got = (bfd_vma) - 1; | |
3365 | ||
3366 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, | |
3367 | sizeof (struct elf_aarch64_stub_hash_entry))) | |
3368 | { | |
3369 | _bfd_elf_link_hash_table_free (abfd); | |
3370 | return NULL; | |
3371 | } | |
3372 | ||
3373 | ret->loc_hash_table = htab_try_create (1024, | |
3374 | elfNN_aarch64_local_htab_hash, | |
3375 | elfNN_aarch64_local_htab_eq, | |
3376 | NULL); | |
3377 | ret->loc_hash_memory = objalloc_create (); | |
3378 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
3379 | { | |
3380 | elfNN_aarch64_link_hash_table_free (abfd); | |
3381 | return NULL; | |
3382 | } | |
3383 | ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free; | |
3384 | ||
3385 | return &ret->root.root; | |
3386 | } | |
3387 | ||
3388 | /* Perform relocation R_TYPE. Returns TRUE upon success, FALSE otherwise. */ | |
3389 | ||
3390 | static bfd_boolean | |
3391 | aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, | |
3392 | bfd_vma offset, bfd_vma value) | |
3393 | { | |
3394 | reloc_howto_type *howto; | |
3395 | bfd_vma place; | |
3396 | ||
3397 | howto = elfNN_aarch64_howto_from_type (input_bfd, r_type); | |
3398 | place = (input_section->output_section->vma + input_section->output_offset | |
3399 | + offset); | |
3400 | ||
3401 | r_type = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); | |
3402 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, r_type, place, | |
3403 | value, 0, FALSE); | |
3404 | return _bfd_aarch64_elf_put_addend (input_bfd, | |
3405 | input_section->contents + offset, r_type, | |
3406 | howto, value) == bfd_reloc_ok; | |
3407 | } | |
3408 | ||
3409 | /* Return interworking stub for a relocation. */ | |
3410 | ||
3411 | static enum elf_aarch64_stub_type | |
3412 | aarch64_interwork_stub (unsigned int r_type, | |
3413 | bfd_boolean branch_to_c64) | |
3414 | { | |
3415 | switch (r_type) | |
3416 | { | |
3417 | case MORELLO_R (JUMP26): | |
3418 | case MORELLO_R (CALL26): | |
3419 | if (!branch_to_c64) | |
3420 | return c64_stub_branch_aarch64; | |
3421 | break; | |
3422 | case AARCH64_R (JUMP26): | |
3423 | case AARCH64_R (CALL26): | |
3424 | if (branch_to_c64) | |
3425 | return aarch64_stub_branch_c64; | |
3426 | break; | |
3427 | default: | |
3428 | break; | |
3429 | } | |
3430 | ||
3431 | return aarch64_stub_none; | |
3432 | } | |
3433 | ||
3434 | static enum elf_aarch64_stub_type | |
3435 | aarch64_select_branch_stub (bfd_vma value, bfd_vma place) | |
3436 | { | |
3437 | if (aarch64_valid_for_adrp_p (value, place)) | |
3438 | return aarch64_stub_adrp_branch; | |
3439 | return aarch64_stub_long_branch; | |
3440 | } | |
3441 | ||
3442 | /* Determine the type of stub needed, if any, for a call. */ | |
3443 | ||
3444 | static enum elf_aarch64_stub_type | |
3445 | aarch64_type_of_stub (asection *input_sec, | |
3446 | const Elf_Internal_Rela *rel, | |
3447 | asection *sym_sec, | |
3448 | unsigned char st_type, | |
3449 | bfd_vma destination) | |
3450 | { | |
3451 | bfd_vma location; | |
3452 | bfd_signed_vma branch_offset; | |
3453 | unsigned int r_type = ELFNN_R_TYPE (rel->r_info); | |
3454 | enum elf_aarch64_stub_type stub_type = aarch64_stub_none; | |
3455 | ||
3456 | if (st_type != STT_FUNC | |
3457 | && (sym_sec == input_sec)) | |
3458 | return stub_type; | |
3459 | ||
3460 | /* Determine where the call point is. */ | |
3461 | location = (input_sec->output_offset | |
3462 | + input_sec->output_section->vma + rel->r_offset); | |
3463 | ||
3464 | branch_offset = (bfd_signed_vma) (destination - location); | |
3465 | ||
3466 | /* For A64 <-> C64 branches we only come here for jumps to PLT. Treat them | |
3467 | as regular branches and leave the interworking to PLT. */ | |
3468 | if (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET | |
3469 | || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET) | |
3470 | { | |
3471 | switch (r_type) | |
3472 | { | |
3473 | /* We don't want to redirect any old unconditional jump in this way, | |
3474 | only one which is being used for a sibcall, where it is | |
3475 | acceptable for the IP0 and IP1 registers to be clobbered. */ | |
3476 | case AARCH64_R (CALL26): | |
3477 | case AARCH64_R (JUMP26): | |
3478 | return aarch64_stub_long_branch; | |
3479 | case MORELLO_R (CALL26): | |
3480 | case MORELLO_R (JUMP26): | |
3481 | return c64_stub_branch_c64; | |
3482 | default: | |
3483 | break; | |
3484 | } | |
3485 | } | |
3486 | ||
3487 | return aarch64_stub_none; | |
3488 | } | |
3489 | ||
3490 | /* Return a string to add as suffix to a veneer name. */ | |
3491 | ||
3492 | static const char * | |
3493 | aarch64_lookup_stub_type_suffix (enum elf_aarch64_stub_type stub_type) | |
3494 | { | |
3495 | switch (stub_type) | |
3496 | { | |
3497 | case aarch64_stub_branch_c64: | |
3498 | return "_a64c64"; | |
3499 | case c64_stub_branch_aarch64: | |
3500 | return "_c64a64"; | |
3501 | break; | |
3502 | default: | |
3503 | return ""; | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | /* Build a name for an entry in the stub hash table. */ | |
3508 | ||
3509 | static char * | |
3510 | elfNN_aarch64_stub_name (const asection *input_section, | |
3511 | const asection *sym_sec, | |
3512 | const struct elf_aarch64_link_hash_entry *hash, | |
3513 | const Elf_Internal_Rela *rel, | |
3514 | enum elf_aarch64_stub_type stub_type) | |
3515 | { | |
3516 | char *stub_name; | |
3517 | bfd_size_type len; | |
3518 | const char *suffix = aarch64_lookup_stub_type_suffix (stub_type);; | |
3519 | ||
3520 | if (hash) | |
3521 | { | |
3522 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; | |
3523 | stub_name = bfd_malloc (len); | |
3524 | if (stub_name != NULL) | |
3525 | snprintf (stub_name, len, "%08x_%s%s+%" BFD_VMA_FMT "x", | |
3526 | (unsigned int) input_section->id, | |
3527 | hash->root.root.root.string, | |
3528 | suffix, rel->r_addend); | |
3529 | } | |
3530 | else | |
3531 | { | |
3532 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; | |
3533 | stub_name = bfd_malloc (len); | |
3534 | if (stub_name != NULL) | |
3535 | snprintf (stub_name, len, "%08x_%x:%x%s+%" BFD_VMA_FMT "x", | |
3536 | (unsigned int) input_section->id, | |
3537 | (unsigned int) sym_sec->id, | |
3538 | (unsigned int) ELFNN_R_SYM (rel->r_info), | |
3539 | suffix, rel->r_addend); | |
3540 | } | |
3541 | ||
3542 | return stub_name; | |
3543 | } | |
3544 | ||
3545 | /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For | |
3546 | executable PLT slots where the executable never takes the address of those | |
3547 | functions, the function symbols are not added to the hash table. */ | |
3548 | ||
3549 | static bfd_boolean | |
3550 | elf_aarch64_hash_symbol (struct elf_link_hash_entry *h) | |
3551 | { | |
3552 | if (h->plt.offset != (bfd_vma) -1 | |
3553 | && !h->def_regular | |
3554 | && !h->pointer_equality_needed) | |
3555 | return FALSE; | |
3556 | ||
3557 | return _bfd_elf_hash_symbol (h); | |
3558 | } | |
3559 | ||
3560 | /* Look up an entry in the stub hash. Stub entries are cached because | |
3561 | creating the stub name takes a bit of time. */ | |
3562 | ||
3563 | static struct elf_aarch64_stub_hash_entry * | |
3564 | elfNN_aarch64_get_stub_entry (const asection *input_section, | |
3565 | const asection *sym_sec, | |
3566 | struct elf_link_hash_entry *hash, | |
3567 | const Elf_Internal_Rela *rel, | |
3568 | struct elf_aarch64_link_hash_table *htab, | |
3569 | enum elf_aarch64_stub_type stub_type) | |
3570 | { | |
3571 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
3572 | struct elf_aarch64_link_hash_entry *h = | |
3573 | (struct elf_aarch64_link_hash_entry *) hash; | |
3574 | const asection *id_sec; | |
3575 | ||
3576 | if ((input_section->flags & SEC_CODE) == 0) | |
3577 | return NULL; | |
3578 | ||
3579 | /* If this input section is part of a group of sections sharing one | |
3580 | stub section, then use the id of the first section in the group. | |
3581 | Stub names need to include a section id, as there may well be | |
3582 | more than one stub used to reach say, printf, and we need to | |
3583 | distinguish between them. */ | |
3584 | id_sec = htab->stub_group[input_section->id].link_sec; | |
3585 | ||
3586 | if (h != NULL && h->stub_cache != NULL | |
3587 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) | |
3588 | { | |
3589 | stub_entry = h->stub_cache; | |
3590 | } | |
3591 | else | |
3592 | { | |
3593 | char *stub_name; | |
3594 | ||
3595 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel, stub_type); | |
3596 | if (stub_name == NULL) | |
3597 | return NULL; | |
3598 | ||
3599 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, | |
3600 | stub_name, FALSE, FALSE); | |
3601 | if (h != NULL) | |
3602 | h->stub_cache = stub_entry; | |
3603 | ||
3604 | free (stub_name); | |
3605 | } | |
3606 | ||
3607 | return stub_entry; | |
3608 | } | |
3609 | ||
3610 | ||
3611 | /* Create a stub section. */ | |
3612 | ||
3613 | static asection * | |
3614 | _bfd_aarch64_create_stub_section (asection *section, | |
3615 | struct elf_aarch64_link_hash_table *htab) | |
3616 | { | |
3617 | size_t namelen; | |
3618 | bfd_size_type len; | |
3619 | char *s_name; | |
3620 | ||
3621 | namelen = strlen (section->name); | |
3622 | len = namelen + sizeof (STUB_SUFFIX); | |
3623 | s_name = bfd_alloc (htab->stub_bfd, len); | |
3624 | if (s_name == NULL) | |
3625 | return NULL; | |
3626 | ||
3627 | memcpy (s_name, section->name, namelen); | |
3628 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
3629 | return (*htab->add_stub_section) (s_name, section); | |
3630 | } | |
3631 | ||
3632 | ||
3633 | /* Find or create a stub section for a link section. | |
3634 | ||
3635 | Fix or create the stub section used to collect stubs attached to | |
3636 | the specified link section. */ | |
3637 | ||
3638 | static asection * | |
3639 | _bfd_aarch64_get_stub_for_link_section (asection *link_section, | |
3640 | struct elf_aarch64_link_hash_table *htab) | |
3641 | { | |
3642 | if (htab->stub_group[link_section->id].stub_sec == NULL) | |
3643 | htab->stub_group[link_section->id].stub_sec | |
3644 | = _bfd_aarch64_create_stub_section (link_section, htab); | |
3645 | return htab->stub_group[link_section->id].stub_sec; | |
3646 | } | |
3647 | ||
3648 | ||
3649 | /* Find or create a stub section in the stub group for an input | |
3650 | section. */ | |
3651 | ||
3652 | static asection * | |
3653 | _bfd_aarch64_create_or_find_stub_sec (asection *section, | |
3654 | struct elf_aarch64_link_hash_table *htab) | |
3655 | { | |
3656 | asection *link_sec = htab->stub_group[section->id].link_sec; | |
3657 | return _bfd_aarch64_get_stub_for_link_section (link_sec, htab); | |
3658 | } | |
3659 | ||
3660 | ||
3661 | /* Add a new stub entry in the stub group associated with an input | |
3662 | section to the stub hash. Not all fields of the new stub entry are | |
3663 | initialised. */ | |
3664 | ||
3665 | static struct elf_aarch64_stub_hash_entry * | |
3666 | _bfd_aarch64_add_stub_entry_in_group (const char *stub_name, | |
3667 | asection *section, | |
3668 | struct elf_aarch64_link_hash_table *htab) | |
3669 | { | |
3670 | asection *link_sec; | |
3671 | asection *stub_sec; | |
3672 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
3673 | ||
3674 | link_sec = htab->stub_group[section->id].link_sec; | |
3675 | stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab); | |
3676 | ||
3677 | /* Enter this entry into the linker stub hash table. */ | |
3678 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
3679 | TRUE, FALSE); | |
3680 | if (stub_entry == NULL) | |
3681 | { | |
3682 | /* xgettext:c-format */ | |
3683 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), | |
3684 | section->owner, stub_name); | |
3685 | return NULL; | |
3686 | } | |
3687 | ||
3688 | stub_entry->stub_sec = stub_sec; | |
3689 | stub_entry->stub_offset = 0; | |
3690 | stub_entry->id_sec = link_sec; | |
3691 | ||
3692 | return stub_entry; | |
3693 | } | |
3694 | ||
3695 | /* Add a new stub entry in the final stub section to the stub hash. | |
3696 | Not all fields of the new stub entry are initialised. */ | |
3697 | ||
3698 | static struct elf_aarch64_stub_hash_entry * | |
3699 | _bfd_aarch64_add_stub_entry_after (const char *stub_name, | |
3700 | asection *link_section, | |
3701 | struct elf_aarch64_link_hash_table *htab) | |
3702 | { | |
3703 | asection *stub_sec; | |
3704 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
3705 | ||
3706 | stub_sec = NULL; | |
3707 | /* Only create the actual stub if we will end up needing it. */ | |
3708 | if (htab->fix_erratum_843419 & ERRAT_ADRP) | |
3709 | stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab); | |
3710 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
3711 | TRUE, FALSE); | |
3712 | if (stub_entry == NULL) | |
3713 | { | |
3714 | _bfd_error_handler (_("cannot create stub entry %s"), stub_name); | |
3715 | return NULL; | |
3716 | } | |
3717 | ||
3718 | stub_entry->stub_sec = stub_sec; | |
3719 | stub_entry->stub_offset = 0; | |
3720 | stub_entry->id_sec = link_section; | |
3721 | ||
3722 | return stub_entry; | |
3723 | } | |
3724 | ||
3725 | ||
3726 | static bfd_boolean | |
3727 | aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, | |
3728 | void *in_arg) | |
3729 | { | |
3730 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
3731 | asection *stub_sec; | |
3732 | bfd *stub_bfd; | |
3733 | bfd_byte *loc; | |
3734 | bfd_vma sym_value; | |
3735 | bfd_vma veneered_insn_loc; | |
3736 | bfd_vma veneer_entry_loc; | |
3737 | bfd_signed_vma branch_offset = 0; | |
3738 | unsigned int template_size; | |
3739 | const uint32_t *template; | |
3740 | unsigned int i; | |
3741 | struct bfd_link_info *info; | |
3742 | ||
3743 | /* Massage our args to the form they really have. */ | |
3744 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; | |
3745 | ||
3746 | info = (struct bfd_link_info *) in_arg; | |
3747 | ||
3748 | /* Fail if the target section could not be assigned to an output | |
3749 | section. The user should fix his linker script. */ | |
3750 | if (stub_entry->target_section->output_section == NULL | |
3751 | && info->non_contiguous_regions) | |
3752 | info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. " | |
3753 | "Retry without " | |
3754 | "--enable-non-contiguous-regions.\n"), | |
3755 | stub_entry->target_section); | |
3756 | ||
3757 | stub_sec = stub_entry->stub_sec; | |
3758 | ||
3759 | /* Make a note of the offset within the stubs for this entry. */ | |
3760 | stub_entry->stub_offset = stub_sec->size; | |
3761 | loc = stub_sec->contents + stub_entry->stub_offset; | |
3762 | ||
3763 | stub_bfd = stub_sec->owner; | |
3764 | ||
3765 | /* This is the address of the stub destination. */ | |
3766 | sym_value = (stub_entry->target_value | |
3767 | + stub_entry->target_section->output_offset | |
3768 | + stub_entry->target_section->output_section->vma); | |
3769 | ||
3770 | bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma | |
3771 | + stub_sec->output_offset); | |
3772 | ||
3773 | if (stub_entry->stub_type == aarch64_stub_long_branch) | |
3774 | { | |
3775 | /* See if we can relax the stub. */ | |
3776 | if (aarch64_valid_for_adrp_p (sym_value, place)) | |
3777 | stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); | |
3778 | } | |
3779 | ||
3780 | if ((stub_entry->stub_type == aarch64_stub_branch_c64 | |
3781 | || stub_entry->stub_type == c64_stub_branch_aarch64 | |
3782 | || stub_entry->stub_type == c64_stub_branch_c64) | |
3783 | && !c64_valid_for_adrp_p (sym_value, place)) | |
3784 | { | |
3785 | _bfd_error_handler | |
3786 | (_("%s: stub target out of range for %s branch"), | |
3787 | stub_entry->output_name, | |
3788 | (stub_entry->stub_type == aarch64_stub_branch_c64 | |
3789 | ? "A64 to C64" : "C64 to A64")); | |
3790 | bfd_set_error (bfd_error_bad_value); | |
3791 | return FALSE; | |
3792 | } | |
3793 | ||
3794 | switch (stub_entry->stub_type) | |
3795 | { | |
3796 | case aarch64_stub_adrp_branch: | |
3797 | template = aarch64_adrp_branch_stub; | |
3798 | template_size = sizeof (aarch64_adrp_branch_stub); | |
3799 | break; | |
3800 | case aarch64_stub_long_branch: | |
3801 | template = aarch64_long_branch_stub; | |
3802 | template_size = sizeof (aarch64_long_branch_stub); | |
3803 | break; | |
3804 | case aarch64_stub_erratum_835769_veneer: | |
3805 | template = aarch64_erratum_835769_stub; | |
3806 | template_size = sizeof (aarch64_erratum_835769_stub); | |
3807 | break; | |
3808 | case aarch64_stub_erratum_843419_veneer: | |
3809 | template = aarch64_erratum_843419_stub; | |
3810 | template_size = sizeof (aarch64_erratum_843419_stub); | |
3811 | break; | |
3812 | case aarch64_stub_branch_c64: | |
3813 | template = aarch64_c64_branch_stub; | |
3814 | template_size = sizeof (aarch64_c64_branch_stub); | |
3815 | break; | |
3816 | case c64_stub_branch_aarch64: | |
3817 | case c64_stub_branch_c64: | |
3818 | template = c64_aarch64_branch_stub; | |
3819 | template_size = sizeof (c64_aarch64_branch_stub); | |
3820 | break; | |
3821 | default: | |
3822 | abort (); | |
3823 | } | |
3824 | ||
3825 | for (i = 0; i < (template_size / sizeof template[0]); i++) | |
3826 | { | |
3827 | bfd_putl32 (template[i], loc); | |
3828 | loc += 4; | |
3829 | } | |
3830 | ||
3831 | template_size = (template_size + 7) & ~7; | |
3832 | stub_sec->size += template_size; | |
3833 | ||
3834 | bfd_vma stub_offset = stub_entry->stub_offset; | |
3835 | ||
3836 | switch (stub_entry->stub_type) | |
3837 | { | |
3838 | case aarch64_stub_adrp_branch: | |
3839 | if (!aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec, | |
3840 | stub_entry->stub_offset, sym_value)) | |
3841 | /* The stub would not have been relaxed if the offset was out | |
3842 | of range. */ | |
3843 | BFD_FAIL (); | |
3844 | ||
3845 | if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec, | |
3846 | stub_entry->stub_offset + 4, sym_value)) | |
3847 | BFD_FAIL (); | |
3848 | break; | |
3849 | ||
3850 | case aarch64_stub_long_branch: | |
3851 | /* We want the value relative to the address 12 bytes back from the | |
3852 | value itself. */ | |
3853 | if (!aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec, | |
3854 | stub_entry->stub_offset + 16, sym_value + 12)) | |
3855 | BFD_FAIL (); | |
3856 | break; | |
3857 | ||
3858 | case aarch64_stub_erratum_835769_veneer: | |
3859 | veneered_insn_loc = stub_entry->target_section->output_section->vma | |
3860 | + stub_entry->target_section->output_offset | |
3861 | + stub_entry->target_value; | |
3862 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma | |
3863 | + stub_entry->stub_sec->output_offset | |
3864 | + stub_entry->stub_offset; | |
3865 | branch_offset = veneered_insn_loc - veneer_entry_loc; | |
3866 | branch_offset >>= 2; | |
3867 | branch_offset &= 0x3ffffff; | |
3868 | bfd_putl32 (stub_entry->veneered_insn, | |
3869 | stub_sec->contents + stub_entry->stub_offset); | |
3870 | bfd_putl32 (template[1] | branch_offset, | |
3871 | stub_sec->contents + stub_entry->stub_offset + 4); | |
3872 | break; | |
3873 | ||
3874 | case aarch64_stub_erratum_843419_veneer: | |
3875 | if (!aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec, | |
3876 | stub_entry->stub_offset + 4, sym_value + 4)) | |
3877 | BFD_FAIL (); | |
3878 | break; | |
3879 | ||
3880 | case aarch64_stub_branch_c64: | |
3881 | stub_offset += 4; | |
3882 | /* Fall through. */ | |
3883 | case c64_stub_branch_aarch64: | |
3884 | case c64_stub_branch_c64: | |
3885 | if (!aarch64_relocate (R_MORELLO_ADR_PREL_PG_HI20, stub_bfd, stub_sec, | |
3886 | stub_offset, sym_value)) | |
3887 | /* We fail early if offset is out of range. */ | |
3888 | BFD_FAIL (); | |
3889 | ||
3890 | if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec, | |
3891 | stub_offset + 4, sym_value)) | |
3892 | BFD_FAIL (); | |
3893 | break; | |
3894 | ||
3895 | default: | |
3896 | abort (); | |
3897 | } | |
3898 | ||
3899 | return TRUE; | |
3900 | } | |
3901 | ||
3902 | /* As above, but don't actually build the stub. Just bump offset so | |
3903 | we know stub section sizes. */ | |
3904 | ||
3905 | static bfd_boolean | |
3906 | aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) | |
3907 | { | |
3908 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
3909 | struct elf_aarch64_link_hash_table *htab; | |
3910 | int size; | |
3911 | ||
3912 | /* Massage our args to the form they really have. */ | |
3913 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; | |
3914 | htab = (struct elf_aarch64_link_hash_table *) in_arg; | |
3915 | ||
3916 | switch (stub_entry->stub_type) | |
3917 | { | |
3918 | case aarch64_stub_adrp_branch: | |
3919 | size = sizeof (aarch64_adrp_branch_stub); | |
3920 | break; | |
3921 | case aarch64_stub_long_branch: | |
3922 | size = sizeof (aarch64_long_branch_stub); | |
3923 | break; | |
3924 | case aarch64_stub_erratum_835769_veneer: | |
3925 | size = sizeof (aarch64_erratum_835769_stub); | |
3926 | break; | |
3927 | case aarch64_stub_erratum_843419_veneer: | |
3928 | { | |
3929 | if (htab->fix_erratum_843419 == ERRAT_ADR) | |
3930 | return TRUE; | |
3931 | size = sizeof (aarch64_erratum_843419_stub); | |
3932 | } | |
3933 | break; | |
3934 | case aarch64_stub_branch_c64: | |
3935 | size = sizeof (aarch64_c64_branch_stub); | |
3936 | break; | |
3937 | case c64_stub_branch_aarch64: | |
3938 | case c64_stub_branch_c64: | |
3939 | size = sizeof (c64_aarch64_branch_stub); | |
3940 | break; | |
3941 | default: | |
3942 | abort (); | |
3943 | } | |
3944 | ||
3945 | size = (size + 7) & ~7; | |
3946 | stub_entry->stub_sec->size += size; | |
3947 | return TRUE; | |
3948 | } | |
3949 | ||
3950 | /* External entry points for sizing and building linker stubs. */ | |
3951 | ||
3952 | /* Set up various things so that we can make a list of input sections | |
3953 | for each output section included in the link. Returns -1 on error, | |
3954 | 0 when no stubs will be needed, and 1 on success. */ | |
3955 | ||
3956 | int | |
3957 | elfNN_aarch64_setup_section_lists (bfd *output_bfd, | |
3958 | struct bfd_link_info *info) | |
3959 | { | |
3960 | bfd *input_bfd; | |
3961 | unsigned int bfd_count; | |
3962 | unsigned int top_id, top_index; | |
3963 | asection *section; | |
3964 | asection **input_list, **list; | |
3965 | size_t amt; | |
3966 | struct elf_aarch64_link_hash_table *htab = | |
3967 | elf_aarch64_hash_table (info); | |
3968 | ||
3969 | if (!is_elf_hash_table (htab)) | |
3970 | return 0; | |
3971 | ||
3972 | /* Count the number of input BFDs and find the top input section id. */ | |
3973 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
3974 | input_bfd != NULL; input_bfd = input_bfd->link.next) | |
3975 | { | |
3976 | bfd_count += 1; | |
3977 | for (section = input_bfd->sections; | |
3978 | section != NULL; section = section->next) | |
3979 | { | |
3980 | if (top_id < section->id) | |
3981 | top_id = section->id; | |
3982 | } | |
3983 | } | |
3984 | htab->bfd_count = bfd_count; | |
3985 | ||
3986 | amt = sizeof (struct map_stub) * (top_id + 1); | |
3987 | htab->stub_group = bfd_zmalloc (amt); | |
3988 | if (htab->stub_group == NULL) | |
3989 | return -1; | |
3990 | ||
3991 | /* We can't use output_bfd->section_count here to find the top output | |
3992 | section index as some sections may have been removed, and | |
3993 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
3994 | for (section = output_bfd->sections, top_index = 0; | |
3995 | section != NULL; section = section->next) | |
3996 | { | |
3997 | if (top_index < section->index) | |
3998 | top_index = section->index; | |
3999 | } | |
4000 | ||
4001 | htab->top_index = top_index; | |
4002 | amt = sizeof (asection *) * (top_index + 1); | |
4003 | input_list = bfd_malloc (amt); | |
4004 | htab->input_list = input_list; | |
4005 | if (input_list == NULL) | |
4006 | return -1; | |
4007 | ||
4008 | /* For sections we aren't interested in, mark their entries with a | |
4009 | value we can check later. */ | |
4010 | list = input_list + top_index; | |
4011 | do | |
4012 | *list = bfd_abs_section_ptr; | |
4013 | while (list-- != input_list); | |
4014 | ||
4015 | for (section = output_bfd->sections; | |
4016 | section != NULL; section = section->next) | |
4017 | { | |
4018 | if ((section->flags & SEC_CODE) != 0) | |
4019 | input_list[section->index] = NULL; | |
4020 | } | |
4021 | ||
4022 | return 1; | |
4023 | } | |
4024 | ||
4025 | /* Used by elfNN_aarch64_next_input_section and group_sections. */ | |
4026 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
4027 | ||
4028 | /* The linker repeatedly calls this function for each input section, | |
4029 | in the order that input sections are linked into output sections. | |
4030 | Build lists of input sections to determine groupings between which | |
4031 | we may insert linker stubs. */ | |
4032 | ||
4033 | void | |
4034 | elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) | |
4035 | { | |
4036 | struct elf_aarch64_link_hash_table *htab = | |
4037 | elf_aarch64_hash_table (info); | |
4038 | ||
4039 | if (isec->output_section->index <= htab->top_index) | |
4040 | { | |
4041 | asection **list = htab->input_list + isec->output_section->index; | |
4042 | ||
4043 | if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0) | |
4044 | { | |
4045 | /* Steal the link_sec pointer for our list. */ | |
4046 | /* This happens to make the list in reverse order, | |
4047 | which is what we want. */ | |
4048 | PREV_SEC (isec) = *list; | |
4049 | *list = isec; | |
4050 | } | |
4051 | } | |
4052 | } | |
4053 | ||
4054 | /* See whether we can group stub sections together. Grouping stub | |
4055 | sections may result in fewer stubs. More importantly, we need to | |
4056 | put all .init* and .fini* stubs at the beginning of the .init or | |
4057 | .fini output sections respectively, because glibc splits the | |
4058 | _init and _fini functions into multiple parts. Putting a stub in | |
4059 | the middle of a function is not a good idea. */ | |
4060 | ||
4061 | static void | |
4062 | group_sections (struct elf_aarch64_link_hash_table *htab, | |
4063 | bfd_size_type stub_group_size, | |
4064 | bfd_boolean stubs_always_after_branch) | |
4065 | { | |
4066 | asection **list = htab->input_list; | |
4067 | ||
4068 | do | |
4069 | { | |
4070 | asection *tail = *list; | |
4071 | asection *head; | |
4072 | ||
4073 | if (tail == bfd_abs_section_ptr) | |
4074 | continue; | |
4075 | ||
4076 | /* Reverse the list: we must avoid placing stubs at the | |
4077 | beginning of the section because the beginning of the text | |
4078 | section may be required for an interrupt vector in bare metal | |
4079 | code. */ | |
4080 | #define NEXT_SEC PREV_SEC | |
4081 | head = NULL; | |
4082 | while (tail != NULL) | |
4083 | { | |
4084 | /* Pop from tail. */ | |
4085 | asection *item = tail; | |
4086 | tail = PREV_SEC (item); | |
4087 | ||
4088 | /* Push on head. */ | |
4089 | NEXT_SEC (item) = head; | |
4090 | head = item; | |
4091 | } | |
4092 | ||
4093 | while (head != NULL) | |
4094 | { | |
4095 | asection *curr; | |
4096 | asection *next; | |
4097 | bfd_vma stub_group_start = head->output_offset; | |
4098 | bfd_vma end_of_next; | |
4099 | ||
4100 | curr = head; | |
4101 | while (NEXT_SEC (curr) != NULL) | |
4102 | { | |
4103 | next = NEXT_SEC (curr); | |
4104 | end_of_next = next->output_offset + next->size; | |
4105 | if (end_of_next - stub_group_start >= stub_group_size) | |
4106 | /* End of NEXT is too far from start, so stop. */ | |
4107 | break; | |
4108 | /* Add NEXT to the group. */ | |
4109 | curr = next; | |
4110 | } | |
4111 | ||
4112 | /* OK, the size from the start to the start of CURR is less | |
4113 | than stub_group_size and thus can be handled by one stub | |
4114 | section. (Or the head section is itself larger than | |
4115 | stub_group_size, in which case we may be toast.) | |
4116 | We should really be keeping track of the total size of | |
4117 | stubs added here, as stubs contribute to the final output | |
4118 | section size. */ | |
4119 | do | |
4120 | { | |
4121 | next = NEXT_SEC (head); | |
4122 | /* Set up this stub group. */ | |
4123 | htab->stub_group[head->id].link_sec = curr; | |
4124 | } | |
4125 | while (head != curr && (head = next) != NULL); | |
4126 | ||
4127 | /* But wait, there's more! Input sections up to stub_group_size | |
4128 | bytes after the stub section can be handled by it too. */ | |
4129 | if (!stubs_always_after_branch) | |
4130 | { | |
4131 | stub_group_start = curr->output_offset + curr->size; | |
4132 | ||
4133 | while (next != NULL) | |
4134 | { | |
4135 | end_of_next = next->output_offset + next->size; | |
4136 | if (end_of_next - stub_group_start >= stub_group_size) | |
4137 | /* End of NEXT is too far from stubs, so stop. */ | |
4138 | break; | |
4139 | /* Add NEXT to the stub group. */ | |
4140 | head = next; | |
4141 | next = NEXT_SEC (head); | |
4142 | htab->stub_group[head->id].link_sec = curr; | |
4143 | } | |
4144 | } | |
4145 | head = next; | |
4146 | } | |
4147 | } | |
4148 | while (list++ != htab->input_list + htab->top_index); | |
4149 | ||
4150 | free (htab->input_list); | |
4151 | } | |
4152 | ||
4153 | #undef PREV_SEC | |
4154 | #undef PREV_SEC | |
4155 | ||
4156 | #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1)) | |
4157 | ||
4158 | #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5) | |
4159 | #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5) | |
4160 | #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5) | |
4161 | #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5) | |
4162 | #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5) | |
4163 | #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5) | |
4164 | ||
4165 | #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000) | |
4166 | #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1) | |
4167 | #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3) | |
4168 | #define AARCH64_ZR 0x1f | |
4169 | ||
4170 | /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for | |
4171 | LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */ | |
4172 | ||
4173 | #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1) | |
4174 | #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000) | |
4175 | #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000) | |
4176 | #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000) | |
4177 | #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000) | |
4178 | #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000) | |
4179 | #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000) | |
4180 | #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000) | |
4181 | #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000) | |
4182 | #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400) | |
4183 | #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800) | |
4184 | #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00) | |
4185 | #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800) | |
4186 | #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000) | |
4187 | #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000) | |
4188 | #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000) | |
4189 | #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000) | |
4190 | #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000) | |
4191 | ||
4192 | /* Classify an INSN if it is indeed a load/store. | |
4193 | ||
4194 | Return TRUE if INSN is a LD/ST instruction otherwise return FALSE. | |
4195 | ||
4196 | For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2 | |
4197 | is set equal to RT. | |
4198 | ||
4199 | For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */ | |
4200 | ||
4201 | static bfd_boolean | |
4202 | aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2, | |
4203 | bfd_boolean *pair, bfd_boolean *load) | |
4204 | { | |
4205 | uint32_t opcode; | |
4206 | unsigned int r; | |
4207 | uint32_t opc = 0; | |
4208 | uint32_t v = 0; | |
4209 | uint32_t opc_v = 0; | |
4210 | ||
4211 | /* Bail out quickly if INSN doesn't fall into the load-store | |
4212 | encoding space. */ | |
4213 | if (!AARCH64_LDST (insn)) | |
4214 | return FALSE; | |
4215 | ||
4216 | *pair = FALSE; | |
4217 | *load = FALSE; | |
4218 | if (AARCH64_LDST_EX (insn)) | |
4219 | { | |
4220 | *rt = AARCH64_RT (insn); | |
4221 | *rt2 = *rt; | |
4222 | if (AARCH64_BIT (insn, 21) == 1) | |
4223 | { | |
4224 | *pair = TRUE; | |
4225 | *rt2 = AARCH64_RT2 (insn); | |
4226 | } | |
4227 | *load = AARCH64_LD (insn); | |
4228 | return TRUE; | |
4229 | } | |
4230 | else if (AARCH64_LDST_NAP (insn) | |
4231 | || AARCH64_LDSTP_PI (insn) | |
4232 | || AARCH64_LDSTP_O (insn) | |
4233 | || AARCH64_LDSTP_PRE (insn)) | |
4234 | { | |
4235 | *pair = TRUE; | |
4236 | *rt = AARCH64_RT (insn); | |
4237 | *rt2 = AARCH64_RT2 (insn); | |
4238 | *load = AARCH64_LD (insn); | |
4239 | return TRUE; | |
4240 | } | |
4241 | else if (AARCH64_LDST_PCREL (insn) | |
4242 | || AARCH64_LDST_UI (insn) | |
4243 | || AARCH64_LDST_PIIMM (insn) | |
4244 | || AARCH64_LDST_U (insn) | |
4245 | || AARCH64_LDST_PREIMM (insn) | |
4246 | || AARCH64_LDST_RO (insn) | |
4247 | || AARCH64_LDST_UIMM (insn)) | |
4248 | { | |
4249 | *rt = AARCH64_RT (insn); | |
4250 | *rt2 = *rt; | |
4251 | if (AARCH64_LDST_PCREL (insn)) | |
4252 | *load = TRUE; | |
4253 | opc = AARCH64_BITS (insn, 22, 2); | |
4254 | v = AARCH64_BIT (insn, 26); | |
4255 | opc_v = opc | (v << 2); | |
4256 | *load = (opc_v == 1 || opc_v == 2 || opc_v == 3 | |
4257 | || opc_v == 5 || opc_v == 7); | |
4258 | return TRUE; | |
4259 | } | |
4260 | else if (AARCH64_LDST_SIMD_M (insn) | |
4261 | || AARCH64_LDST_SIMD_M_PI (insn)) | |
4262 | { | |
4263 | *rt = AARCH64_RT (insn); | |
4264 | *load = AARCH64_BIT (insn, 22); | |
4265 | opcode = (insn >> 12) & 0xf; | |
4266 | switch (opcode) | |
4267 | { | |
4268 | case 0: | |
4269 | case 2: | |
4270 | *rt2 = *rt + 3; | |
4271 | break; | |
4272 | ||
4273 | case 4: | |
4274 | case 6: | |
4275 | *rt2 = *rt + 2; | |
4276 | break; | |
4277 | ||
4278 | case 7: | |
4279 | *rt2 = *rt; | |
4280 | break; | |
4281 | ||
4282 | case 8: | |
4283 | case 10: | |
4284 | *rt2 = *rt + 1; | |
4285 | break; | |
4286 | ||
4287 | default: | |
4288 | return FALSE; | |
4289 | } | |
4290 | return TRUE; | |
4291 | } | |
4292 | else if (AARCH64_LDST_SIMD_S (insn) | |
4293 | || AARCH64_LDST_SIMD_S_PI (insn)) | |
4294 | { | |
4295 | *rt = AARCH64_RT (insn); | |
4296 | r = (insn >> 21) & 1; | |
4297 | *load = AARCH64_BIT (insn, 22); | |
4298 | opcode = (insn >> 13) & 0x7; | |
4299 | switch (opcode) | |
4300 | { | |
4301 | case 0: | |
4302 | case 2: | |
4303 | case 4: | |
4304 | *rt2 = *rt + r; | |
4305 | break; | |
4306 | ||
4307 | case 1: | |
4308 | case 3: | |
4309 | case 5: | |
4310 | *rt2 = *rt + (r == 0 ? 2 : 3); | |
4311 | break; | |
4312 | ||
4313 | case 6: | |
4314 | *rt2 = *rt + r; | |
4315 | break; | |
4316 | ||
4317 | case 7: | |
4318 | *rt2 = *rt + (r == 0 ? 2 : 3); | |
4319 | break; | |
4320 | ||
4321 | default: | |
4322 | return FALSE; | |
4323 | } | |
4324 | return TRUE; | |
4325 | } | |
4326 | ||
4327 | return FALSE; | |
4328 | } | |
4329 | ||
4330 | /* Return TRUE if INSN is multiply-accumulate. */ | |
4331 | ||
4332 | static bfd_boolean | |
4333 | aarch64_mlxl_p (uint32_t insn) | |
4334 | { | |
4335 | uint32_t op31 = AARCH64_OP31 (insn); | |
4336 | ||
4337 | if (AARCH64_MAC (insn) | |
4338 | && (op31 == 0 || op31 == 1 || op31 == 5) | |
4339 | /* Exclude MUL instructions which are encoded as a multiple accumulate | |
4340 | with RA = XZR. */ | |
4341 | && AARCH64_RA (insn) != AARCH64_ZR) | |
4342 | return TRUE; | |
4343 | ||
4344 | return FALSE; | |
4345 | } | |
4346 | ||
4347 | /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby | |
4348 | it is possible for a 64-bit multiply-accumulate instruction to generate an | |
4349 | incorrect result. The details are quite complex and hard to | |
4350 | determine statically, since branches in the code may exist in some | |
4351 | circumstances, but all cases end with a memory (load, store, or | |
4352 | prefetch) instruction followed immediately by the multiply-accumulate | |
4353 | operation. We employ a linker patching technique, by moving the potentially | |
4354 | affected multiply-accumulate instruction into a patch region and replacing | |
4355 | the original instruction with a branch to the patch. This function checks | |
4356 | if INSN_1 is the memory operation followed by a multiply-accumulate | |
4357 | operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE | |
4358 | if INSN_1 and INSN_2 are safe. */ | |
4359 | ||
4360 | static bfd_boolean | |
4361 | aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2) | |
4362 | { | |
4363 | uint32_t rt; | |
4364 | uint32_t rt2; | |
4365 | uint32_t rn; | |
4366 | uint32_t rm; | |
4367 | uint32_t ra; | |
4368 | bfd_boolean pair; | |
4369 | bfd_boolean load; | |
4370 | ||
4371 | if (aarch64_mlxl_p (insn_2) | |
4372 | && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load)) | |
4373 | { | |
4374 | /* Any SIMD memory op is independent of the subsequent MLA | |
4375 | by definition of the erratum. */ | |
4376 | if (AARCH64_BIT (insn_1, 26)) | |
4377 | return TRUE; | |
4378 | ||
4379 | /* If not SIMD, check for integer memory ops and MLA relationship. */ | |
4380 | rn = AARCH64_RN (insn_2); | |
4381 | ra = AARCH64_RA (insn_2); | |
4382 | rm = AARCH64_RM (insn_2); | |
4383 | ||
4384 | /* If this is a load and there's a true(RAW) dependency, we are safe | |
4385 | and this is not an erratum sequence. */ | |
4386 | if (load && | |
4387 | (rt == rn || rt == rm || rt == ra | |
4388 | || (pair && (rt2 == rn || rt2 == rm || rt2 == ra)))) | |
4389 | return FALSE; | |
4390 | ||
4391 | /* We conservatively put out stubs for all other cases (including | |
4392 | writebacks). */ | |
4393 | return TRUE; | |
4394 | } | |
4395 | ||
4396 | return FALSE; | |
4397 | } | |
4398 | ||
4399 | ||
4400 | static char * | |
4401 | _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes) | |
4402 | { | |
4403 | char *stub_name = (char *) bfd_malloc | |
4404 | (strlen ("__erratum_835769_veneer_") + 16); | |
4405 | if (stub_name != NULL) | |
4406 | sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes); | |
4407 | return stub_name; | |
4408 | } | |
4409 | ||
4410 | /* Scan for Cortex-A53 erratum 835769 sequence. | |
4411 | ||
4412 | Return TRUE else FALSE on abnormal termination. */ | |
4413 | ||
4414 | static bfd_boolean | |
4415 | _bfd_aarch64_erratum_835769_scan (bfd *input_bfd, | |
4416 | struct bfd_link_info *info, | |
4417 | unsigned int *num_fixes_p) | |
4418 | { | |
4419 | asection *section; | |
4420 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
4421 | unsigned int num_fixes = *num_fixes_p; | |
4422 | ||
4423 | if (htab == NULL) | |
4424 | return TRUE; | |
4425 | ||
4426 | for (section = input_bfd->sections; | |
4427 | section != NULL; | |
4428 | section = section->next) | |
4429 | { | |
4430 | bfd_byte *contents = NULL; | |
4431 | struct _aarch64_elf_section_data *sec_data; | |
4432 | unsigned int span; | |
4433 | ||
4434 | if (elf_section_type (section) != SHT_PROGBITS | |
4435 | || (elf_section_flags (section) & SHF_EXECINSTR) == 0 | |
4436 | || (section->flags & SEC_EXCLUDE) != 0 | |
4437 | || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4438 | || (section->output_section == bfd_abs_section_ptr)) | |
4439 | continue; | |
4440 | ||
4441 | if (elf_section_data (section)->this_hdr.contents != NULL) | |
4442 | contents = elf_section_data (section)->this_hdr.contents; | |
4443 | else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) | |
4444 | return FALSE; | |
4445 | ||
4446 | sec_data = elf_aarch64_section_data (section); | |
4447 | ||
4448 | if (sec_data->mapcount) | |
4449 | qsort (sec_data->map, sec_data->mapcount, | |
4450 | sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); | |
4451 | ||
4452 | for (span = 0; span < sec_data->mapcount; span++) | |
4453 | { | |
4454 | unsigned int span_start = sec_data->map[span].vma; | |
4455 | unsigned int span_end = ((span == sec_data->mapcount - 1) | |
4456 | ? sec_data->map[0].vma + section->size | |
4457 | : sec_data->map[span + 1].vma); | |
4458 | unsigned int i; | |
4459 | char span_type = sec_data->map[span].type; | |
4460 | ||
4461 | if (span_type == 'd') | |
4462 | continue; | |
4463 | ||
4464 | for (i = span_start; i + 4 < span_end; i += 4) | |
4465 | { | |
4466 | uint32_t insn_1 = bfd_getl32 (contents + i); | |
4467 | uint32_t insn_2 = bfd_getl32 (contents + i + 4); | |
4468 | ||
4469 | if (aarch64_erratum_sequence (insn_1, insn_2)) | |
4470 | { | |
4471 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
4472 | char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes); | |
4473 | if (! stub_name) | |
4474 | return FALSE; | |
4475 | ||
4476 | stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name, | |
4477 | section, | |
4478 | htab); | |
4479 | if (! stub_entry) | |
4480 | return FALSE; | |
4481 | ||
4482 | stub_entry->stub_type = aarch64_stub_erratum_835769_veneer; | |
4483 | stub_entry->target_section = section; | |
4484 | stub_entry->target_value = i + 4; | |
4485 | stub_entry->veneered_insn = insn_2; | |
4486 | stub_entry->output_name = stub_name; | |
4487 | num_fixes++; | |
4488 | } | |
4489 | } | |
4490 | } | |
4491 | if (elf_section_data (section)->this_hdr.contents == NULL) | |
4492 | free (contents); | |
4493 | } | |
4494 | ||
4495 | *num_fixes_p = num_fixes; | |
4496 | ||
4497 | return TRUE; | |
4498 | } | |
4499 | ||
4500 | ||
4501 | /* Test if instruction INSN is ADRP. */ | |
4502 | ||
4503 | static bfd_boolean | |
4504 | _bfd_aarch64_adrp_p (uint32_t insn) | |
4505 | { | |
4506 | return ((insn & AARCH64_ADRP_OP_MASK) == AARCH64_ADRP_OP); | |
4507 | } | |
4508 | ||
4509 | ||
4510 | /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */ | |
4511 | ||
4512 | static bfd_boolean | |
4513 | _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2, | |
4514 | uint32_t insn_3) | |
4515 | { | |
4516 | uint32_t rt; | |
4517 | uint32_t rt2; | |
4518 | bfd_boolean pair; | |
4519 | bfd_boolean load; | |
4520 | ||
4521 | return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load) | |
4522 | && (!pair | |
4523 | || (pair && !load)) | |
4524 | && AARCH64_LDST_UIMM (insn_3) | |
4525 | && AARCH64_RN (insn_3) == AARCH64_RD (insn_1)); | |
4526 | } | |
4527 | ||
4528 | ||
4529 | /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence. | |
4530 | ||
4531 | Return TRUE if section CONTENTS at offset I contains one of the | |
4532 | erratum 843419 sequences, otherwise return FALSE. If a sequence is | |
4533 | seen set P_VENEER_I to the offset of the final LOAD/STORE | |
4534 | instruction in the sequence. | |
4535 | */ | |
4536 | ||
4537 | static bfd_boolean | |
4538 | _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma, | |
4539 | bfd_vma i, bfd_vma span_end, | |
4540 | bfd_vma *p_veneer_i) | |
4541 | { | |
4542 | uint32_t insn_1 = bfd_getl32 (contents + i); | |
4543 | ||
4544 | if (!_bfd_aarch64_adrp_p (insn_1)) | |
4545 | return FALSE; | |
4546 | ||
4547 | if (span_end < i + 12) | |
4548 | return FALSE; | |
4549 | ||
4550 | uint32_t insn_2 = bfd_getl32 (contents + i + 4); | |
4551 | uint32_t insn_3 = bfd_getl32 (contents + i + 8); | |
4552 | ||
4553 | if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc) | |
4554 | return FALSE; | |
4555 | ||
4556 | if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3)) | |
4557 | { | |
4558 | *p_veneer_i = i + 8; | |
4559 | return TRUE; | |
4560 | } | |
4561 | ||
4562 | if (span_end < i + 16) | |
4563 | return FALSE; | |
4564 | ||
4565 | uint32_t insn_4 = bfd_getl32 (contents + i + 12); | |
4566 | ||
4567 | if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4)) | |
4568 | { | |
4569 | *p_veneer_i = i + 12; | |
4570 | return TRUE; | |
4571 | } | |
4572 | ||
4573 | return FALSE; | |
4574 | } | |
4575 | ||
4576 | ||
4577 | /* Resize all stub sections. */ | |
4578 | ||
4579 | static void | |
4580 | _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab) | |
4581 | { | |
4582 | asection *section; | |
4583 | ||
4584 | /* OK, we've added some stubs. Find out the new size of the | |
4585 | stub sections. */ | |
4586 | for (section = htab->stub_bfd->sections; | |
4587 | section != NULL; section = section->next) | |
4588 | { | |
4589 | /* Ignore non-stub sections. */ | |
4590 | if (!strstr (section->name, STUB_SUFFIX)) | |
4591 | continue; | |
4592 | section->size = 0; | |
4593 | } | |
4594 | ||
4595 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); | |
4596 | ||
4597 | for (section = htab->stub_bfd->sections; | |
4598 | section != NULL; section = section->next) | |
4599 | { | |
4600 | if (!strstr (section->name, STUB_SUFFIX)) | |
4601 | continue; | |
4602 | ||
4603 | /* Add space for a branch. Add 8 bytes to keep section 8 byte aligned, | |
4604 | as long branch stubs contain a 64-bit address. */ | |
4605 | if (section->size) | |
4606 | section->size += 8; | |
4607 | ||
4608 | /* Ensure all stub sections have a size which is a multiple of | |
4609 | 4096. This is important in order to ensure that the insertion | |
4610 | of stub sections does not in itself move existing code around | |
4611 | in such a way that new errata sequences are created. We only do this | |
4612 | when the ADRP workaround is enabled. If only the ADR workaround is | |
4613 | enabled then the stubs workaround won't ever be used. */ | |
4614 | if (htab->fix_erratum_843419 & ERRAT_ADRP) | |
4615 | if (section->size) | |
4616 | section->size = BFD_ALIGN (section->size, 0x1000); | |
4617 | } | |
4618 | } | |
4619 | ||
4620 | /* Construct an erratum 843419 workaround stub name. */ | |
4621 | ||
4622 | static char * | |
4623 | _bfd_aarch64_erratum_843419_stub_name (asection *input_section, | |
4624 | bfd_vma offset) | |
4625 | { | |
4626 | const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1; | |
4627 | char *stub_name = bfd_malloc (len); | |
4628 | ||
4629 | if (stub_name != NULL) | |
4630 | snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x", | |
4631 | input_section->owner->id, | |
4632 | input_section->id, | |
4633 | offset); | |
4634 | return stub_name; | |
4635 | } | |
4636 | ||
4637 | /* Build a stub_entry structure describing an 843419 fixup. | |
4638 | ||
4639 | The stub_entry constructed is populated with the bit pattern INSN | |
4640 | of the instruction located at OFFSET within input SECTION. | |
4641 | ||
4642 | Returns TRUE on success. */ | |
4643 | ||
4644 | static bfd_boolean | |
4645 | _bfd_aarch64_erratum_843419_fixup (uint32_t insn, | |
4646 | bfd_vma adrp_offset, | |
4647 | bfd_vma ldst_offset, | |
4648 | asection *section, | |
4649 | struct bfd_link_info *info) | |
4650 | { | |
4651 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
4652 | char *stub_name; | |
4653 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
4654 | ||
4655 | stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset); | |
4656 | if (stub_name == NULL) | |
4657 | return FALSE; | |
4658 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
4659 | FALSE, FALSE); | |
4660 | if (stub_entry) | |
4661 | { | |
4662 | free (stub_name); | |
4663 | return TRUE; | |
4664 | } | |
4665 | ||
4666 | /* We always place an 843419 workaround veneer in the stub section | |
4667 | attached to the input section in which an erratum sequence has | |
4668 | been found. This ensures that later in the link process (in | |
4669 | elfNN_aarch64_write_section) when we copy the veneered | |
4670 | instruction from the input section into the stub section the | |
4671 | copied instruction will have had any relocations applied to it. | |
4672 | If we placed workaround veneers in any other stub section then we | |
4673 | could not assume that all relocations have been processed on the | |
4674 | corresponding input section at the point we output the stub | |
4675 | section. */ | |
4676 | ||
4677 | stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab); | |
4678 | if (stub_entry == NULL) | |
4679 | { | |
4680 | free (stub_name); | |
4681 | return FALSE; | |
4682 | } | |
4683 | ||
4684 | stub_entry->adrp_offset = adrp_offset; | |
4685 | stub_entry->target_value = ldst_offset; | |
4686 | stub_entry->target_section = section; | |
4687 | stub_entry->stub_type = aarch64_stub_erratum_843419_veneer; | |
4688 | stub_entry->veneered_insn = insn; | |
4689 | stub_entry->output_name = stub_name; | |
4690 | ||
4691 | return TRUE; | |
4692 | } | |
4693 | ||
4694 | ||
4695 | /* Scan an input section looking for the signature of erratum 843419. | |
4696 | ||
4697 | Scans input SECTION in INPUT_BFD looking for erratum 843419 | |
4698 | signatures, for each signature found a stub_entry is created | |
4699 | describing the location of the erratum for subsequent fixup. | |
4700 | ||
4701 | Return TRUE on successful scan, FALSE on failure to scan. | |
4702 | */ | |
4703 | ||
4704 | static bfd_boolean | |
4705 | _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section, | |
4706 | struct bfd_link_info *info) | |
4707 | { | |
4708 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
4709 | ||
4710 | if (htab == NULL) | |
4711 | return TRUE; | |
4712 | ||
4713 | if (elf_section_type (section) != SHT_PROGBITS | |
4714 | || (elf_section_flags (section) & SHF_EXECINSTR) == 0 | |
4715 | || (section->flags & SEC_EXCLUDE) != 0 | |
4716 | || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4717 | || (section->output_section == bfd_abs_section_ptr)) | |
4718 | return TRUE; | |
4719 | ||
4720 | do | |
4721 | { | |
4722 | bfd_byte *contents = NULL; | |
4723 | struct _aarch64_elf_section_data *sec_data; | |
4724 | unsigned int span; | |
4725 | ||
4726 | if (elf_section_data (section)->this_hdr.contents != NULL) | |
4727 | contents = elf_section_data (section)->this_hdr.contents; | |
4728 | else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) | |
4729 | return FALSE; | |
4730 | ||
4731 | sec_data = elf_aarch64_section_data (section); | |
4732 | ||
4733 | if (sec_data->mapcount) | |
4734 | qsort (sec_data->map, sec_data->mapcount, | |
4735 | sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); | |
4736 | ||
4737 | for (span = 0; span < sec_data->mapcount; span++) | |
4738 | { | |
4739 | unsigned int span_start = sec_data->map[span].vma; | |
4740 | unsigned int span_end = ((span == sec_data->mapcount - 1) | |
4741 | ? sec_data->map[0].vma + section->size | |
4742 | : sec_data->map[span + 1].vma); | |
4743 | unsigned int i; | |
4744 | char span_type = sec_data->map[span].type; | |
4745 | ||
4746 | if (span_type == 'd') | |
4747 | continue; | |
4748 | ||
4749 | for (i = span_start; i + 8 < span_end; i += 4) | |
4750 | { | |
4751 | bfd_vma vma = (section->output_section->vma | |
4752 | + section->output_offset | |
4753 | + i); | |
4754 | bfd_vma veneer_i; | |
4755 | ||
4756 | if (_bfd_aarch64_erratum_843419_p | |
4757 | (contents, vma, i, span_end, &veneer_i)) | |
4758 | { | |
4759 | uint32_t insn = bfd_getl32 (contents + veneer_i); | |
4760 | ||
4761 | if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i, | |
4762 | section, info)) | |
4763 | return FALSE; | |
4764 | } | |
4765 | } | |
4766 | } | |
4767 | ||
4768 | if (elf_section_data (section)->this_hdr.contents == NULL) | |
4769 | free (contents); | |
4770 | } | |
4771 | while (0); | |
4772 | ||
4773 | return TRUE; | |
4774 | } | |
4775 | ||
4776 | static bfd_boolean | |
4777 | section_start_symbol (bfd *abfd ATTRIBUTE_UNUSED, asection *section, | |
4778 | void *valp) | |
4779 | { | |
4780 | return section->vma == *(bfd_vma *)valp; | |
4781 | } | |
4782 | ||
4783 | /* Capability format functions. */ | |
4784 | ||
4785 | static unsigned | |
4786 | exponent (uint64_t len) | |
4787 | { | |
4788 | #define CAP_MAX_EXPONENT 50 | |
4789 | /* Size is a 65 bit value, so there's an implicit 0 MSB. */ | |
4790 | unsigned zeroes = __builtin_clzl (len) + 1; | |
4791 | ||
4792 | /* All bits up to and including CAP_MW - 2 are zero. */ | |
4793 | if (CAP_MAX_EXPONENT < zeroes) | |
4794 | return (unsigned) -1; | |
4795 | else | |
4796 | return CAP_MAX_EXPONENT - zeroes; | |
4797 | #undef CAP_MAX_EXPONENT | |
4798 | } | |
4799 | ||
4800 | #define ONES(x) ((1ULL << (x)) - 1) | |
4801 | #define ALIGN_UP(x, a) (((x) + ONES (a)) & (~ONES (a))) | |
4802 | ||
4803 | static bfd_boolean | |
4804 | c64_valid_cap_range (bfd_vma *basep, bfd_vma *limitp, unsigned *alignmentp) | |
4805 | { | |
4806 | bfd_vma base = *basep, size = *limitp - *basep; | |
4807 | ||
4808 | unsigned e, old_e; | |
4809 | *alignmentp = 1; | |
4810 | ||
4811 | if ((e = exponent (size)) == (unsigned) -1) | |
4812 | return TRUE; | |
4813 | ||
4814 | size = ALIGN_UP (size, e + 3); | |
4815 | old_e = e; | |
4816 | e = exponent (size); | |
4817 | if (old_e != e) | |
4818 | size = ALIGN_UP (size, e + 3); | |
4819 | ||
4820 | base = ALIGN_UP (base, e + 3); | |
4821 | ||
4822 | *alignmentp = e+3; | |
4823 | if (base == *basep && *limitp == base + size) | |
4824 | return TRUE; | |
4825 | ||
4826 | *basep = base; | |
4827 | *limitp = base + size; | |
4828 | return FALSE; | |
4829 | } | |
4830 | ||
4831 | struct sec_change_queue | |
4832 | { | |
4833 | asection *sec; | |
4834 | struct sec_change_queue *next; | |
4835 | }; | |
4836 | ||
4837 | /* Queue up the change, sorted in order of the output section vma. */ | |
4838 | ||
4839 | static void | |
4840 | queue_section_padding (struct sec_change_queue **queue, asection *sec) | |
4841 | { | |
4842 | struct sec_change_queue *q = *queue, *last_q = NULL, *n; | |
4843 | ||
4844 | while (q != NULL) | |
4845 | { | |
4846 | if (q->sec->vma > sec->vma) | |
4847 | break; | |
4848 | last_q = q; | |
4849 | q = q->next; | |
4850 | } | |
4851 | ||
4852 | n = bfd_zmalloc (sizeof (struct sec_change_queue)); | |
4853 | ||
4854 | if (last_q == NULL) | |
4855 | *queue = n; | |
4856 | else | |
4857 | { | |
4858 | n->next = q; | |
4859 | last_q->next = n; | |
4860 | } | |
4861 | ||
4862 | n->sec = sec; | |
4863 | } | |
4864 | ||
4865 | /* Check if the bounds covering all sections between LOW_SEC and HIGH_SEC will | |
4866 | get rounded off in the Morello capability format and if it does, queue up a | |
4867 | change to fix up the section layout. */ | |
4868 | static inline void | |
4869 | record_section_change (asection *sec, struct sec_change_queue **queue) | |
4870 | { | |
4871 | bfd_vma low = sec->vma; | |
4872 | bfd_vma high = sec->vma + sec->size; | |
4873 | unsigned alignment; | |
4874 | ||
4875 | if (!c64_valid_cap_range (&low, &high, &alignment)) | |
4876 | queue_section_padding (queue, sec); | |
4877 | } | |
4878 | ||
4879 | /* Make sure that all capabilities that refer to sections have bounds that | |
4880 | won't overlap with neighbouring sections. This is needed in two specific | |
4881 | cases. The first case is that of PCC, which needs to span across all | |
4882 | readonly sections as well as the GOT and PLT sections in the output binary. | |
4883 | The second case is that of linker and ldscript defined symbols that indicate | |
4884 | start and/or end of sections and/or zero-sized symbols. | |
4885 | ||
4886 | In both cases, overlap of capability bounds are avoided by aligning the base | |
4887 | of the section and if necessary, adding a pad at the end of the section so | |
4888 | that the section following it starts only after the pad. */ | |
4889 | ||
4890 | static bfd_vma pcc_low; | |
4891 | static bfd_vma pcc_high; | |
4892 | void | |
4893 | elfNN_c64_resize_sections (bfd *output_bfd, struct bfd_link_info *info, | |
4894 | void (*c64_pad_section) (asection *, bfd_vma), | |
4895 | void (*layout_sections_again) (void)) | |
4896 | { | |
4897 | asection *sec, *pcc_low_sec = NULL, *pcc_high_sec = NULL; | |
4898 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
4899 | bfd_vma low = (bfd_vma) -1, high = 0; | |
4900 | bfd *input_bfd; | |
4901 | ||
4902 | htab->layout_sections_again = layout_sections_again; | |
4903 | ||
4904 | if (!htab->c64_output) | |
4905 | return; | |
4906 | ||
4907 | struct sec_change_queue *queue = NULL; | |
4908 | ||
4909 | /* First, walk through all the relocations to find those referring to linker | |
4910 | defined and ldscript defined symbols since we set their range to their | |
4911 | output sections. */ | |
4912 | for (input_bfd = info->input_bfds; | |
4913 | htab->c64_rel && input_bfd != NULL; input_bfd = input_bfd->link.next) | |
4914 | { | |
4915 | Elf_Internal_Shdr *symtab_hdr; | |
4916 | ||
4917 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
4918 | if (symtab_hdr->sh_info == 0) | |
4919 | continue; | |
4920 | ||
4921 | for (sec = input_bfd->sections; sec != NULL; sec = sec->next) | |
4922 | { | |
4923 | Elf_Internal_Rela *irelaend, *irela; | |
4924 | ||
4925 | /* If there aren't any relocs, then there's nothing more to do. */ | |
4926 | if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) | |
4927 | continue; | |
4928 | ||
4929 | irela = _bfd_elf_link_read_relocs (input_bfd, sec, NULL, NULL, | |
4930 | info->keep_memory); | |
4931 | if (irela == NULL) | |
4932 | continue; | |
4933 | ||
4934 | /* Now examine each relocation. */ | |
4935 | irelaend = irela + sec->reloc_count; | |
4936 | for (; irela < irelaend; irela++) | |
4937 | { | |
4938 | unsigned int r_indx; | |
4939 | struct elf_link_hash_entry *h; | |
4940 | int e_indx; | |
4941 | asection *os; | |
4942 | ||
4943 | r_indx = ELFNN_R_SYM (irela->r_info); | |
4944 | ||
4945 | /* Linker defined or linker script defined symbols are always in | |
4946 | the symbol hash. */ | |
4947 | if (r_indx < symtab_hdr->sh_info) | |
4948 | continue; | |
4949 | ||
4950 | e_indx = r_indx - symtab_hdr->sh_info; | |
4951 | h = elf_sym_hashes (input_bfd)[e_indx]; | |
4952 | ||
4953 | /* XXX Does this ever happen? */ | |
4954 | if (h == NULL) | |
4955 | continue; | |
4956 | ||
4957 | os = h->root.u.def.section->output_section; | |
4958 | ||
4959 | if (h->root.linker_def) | |
4960 | record_section_change (os, &queue); | |
4961 | else if (h->root.ldscript_def) | |
4962 | { | |
4963 | const char *name = h->root.root.string; | |
4964 | size_t len = strlen (name); | |
4965 | ||
4966 | if (len > 8 && name[0] == '_' && name[1] == '_' | |
4967 | && (!strncmp (name + 2, "start_", 6) | |
4968 | || !strcmp (name + len - 6, "_start"))) | |
4969 | { | |
4970 | bfd_vma value = os->vma + os->size; | |
4971 | ||
4972 | os = bfd_sections_find_if (info->output_bfd, | |
4973 | section_start_symbol, &value); | |
4974 | ||
4975 | if (os != NULL) | |
4976 | record_section_change (os, &queue); | |
4977 | } | |
4978 | /* XXX We're overfitting here because the offset of H within | |
4979 | the output section is not yet resolved and ldscript | |
4980 | defined symbols do not have input section information. */ | |
4981 | else | |
4982 | record_section_change (os, &queue); | |
4983 | } | |
4984 | } | |
4985 | } | |
4986 | } | |
4987 | ||
4988 | /* Next, walk through output sections to find the PCC span and add a padding | |
4989 | at the end to ensure that PCC bounds don't bleed into neighbouring | |
4990 | sections. For now PCC needs to encompass all code sections, .got, .plt | |
4991 | and .got.plt. */ | |
4992 | for (sec = output_bfd->sections; sec != NULL; sec = sec->next) | |
4993 | { | |
4994 | /* XXX This is a good place to figure out if there are any readable or | |
4995 | writable sections in the PCC range that are not in the list of | |
4996 | sections we want the PCC to span and then warn the user of it. */ | |
4997 | ||
4998 | #define NOT_OP_SECTION(s) ((s) == NULL || (s)->output_section != sec) | |
4999 | ||
5000 | if ((sec->flags & SEC_READONLY) == 0 | |
5001 | && NOT_OP_SECTION (htab->root.sgotplt) | |
5002 | && NOT_OP_SECTION (htab->root.igotplt) | |
5003 | && NOT_OP_SECTION (htab->root.sgot) | |
5004 | && NOT_OP_SECTION (htab->root.splt) | |
5005 | && NOT_OP_SECTION (htab->root.iplt) | |
5006 | && (sec->vma < info->relro_start | |
5007 | || sec->vma >= info->relro_end)) | |
5008 | continue; | |
5009 | if ((sec->flags & SEC_ALLOC) == 0) | |
5010 | continue; | |
5011 | ||
5012 | if (sec->vma < low) | |
5013 | { | |
5014 | low = sec->vma; | |
5015 | pcc_low_sec = sec; | |
5016 | } | |
5017 | if (sec->vma + sec->size > high) | |
5018 | { | |
5019 | high = sec->vma + sec->size; | |
5020 | pcc_high_sec = sec; | |
5021 | } | |
5022 | ||
5023 | #undef NOT_OP_SECTION | |
5024 | } | |
5025 | ||
5026 | /* Sequentially add alignment and padding as required. We also need to | |
5027 | account for the PCC-related alignment and padding here since its | |
5028 | requirements could change based on the range of sections it encompasses | |
5029 | and whether they need to be padded or aligned. */ | |
5030 | while (queue) | |
5031 | { | |
5032 | unsigned align = 0; | |
5033 | bfd_vma padding = 0; | |
5034 | ||
5035 | low = queue->sec->vma; | |
5036 | high = queue->sec->vma + queue->sec->size; | |
5037 | ||
5038 | if (!c64_valid_cap_range (&low, &high, &align)) | |
5039 | { | |
5040 | if (queue->sec->alignment_power < align) | |
5041 | queue->sec->alignment_power = align; | |
5042 | ||
5043 | padding = high - queue->sec->vma - queue->sec->size; | |
5044 | ||
5045 | if (queue->sec != pcc_high_sec) | |
5046 | { | |
5047 | c64_pad_section (queue->sec, padding); | |
5048 | padding = 0; | |
5049 | } | |
5050 | } | |
5051 | ||
5052 | /* If we have crossed all sections within the PCC range, set up alignment | |
5053 | and padding for the PCC range. */ | |
5054 | if (pcc_high_sec != NULL && pcc_low_sec != NULL | |
5055 | && (queue->next == NULL | |
5056 | || queue->next->sec->vma > pcc_high_sec->vma)) | |
5057 | { | |
5058 | /* Layout sections since it affects the final range of PCC. */ | |
5059 | (*htab->layout_sections_again) (); | |
5060 | ||
5061 | pcc_low = pcc_low_sec->vma; | |
5062 | pcc_high = pcc_high_sec->vma + pcc_high_sec->size + padding; | |
5063 | ||
5064 | if (!c64_valid_cap_range (&pcc_low, &pcc_high, &align)) | |
5065 | { | |
5066 | if (pcc_low_sec->alignment_power < align) | |
5067 | pcc_low_sec->alignment_power = align; | |
5068 | ||
5069 | padding = pcc_high - pcc_high_sec->vma - pcc_high_sec->size; | |
5070 | c64_pad_section (pcc_high_sec, padding); | |
5071 | } | |
5072 | } | |
5073 | ||
5074 | (*htab->layout_sections_again) (); | |
5075 | ||
5076 | struct sec_change_queue *queue_free = queue; | |
5077 | ||
5078 | queue = queue->next; | |
5079 | free (queue_free); | |
5080 | } | |
5081 | ||
5082 | if (pcc_low_sec) | |
5083 | { | |
5084 | if (!pcc_high_sec) | |
5085 | abort (); | |
5086 | pcc_low = pcc_low_sec->vma; | |
5087 | pcc_high = pcc_high_sec->vma + pcc_high_sec->size; | |
5088 | } | |
5089 | } | |
5090 | ||
5091 | /* Determine and set the size of the stub section for a final link. | |
5092 | ||
5093 | The basic idea here is to examine all the relocations looking for | |
5094 | PC-relative calls to a target that either needs a PE state change (A64 to | |
5095 | C64 or vice versa) or in case of unconditional branches (B/BL), is | |
5096 | unreachable. */ | |
5097 | ||
5098 | bfd_boolean | |
5099 | elfNN_aarch64_size_stubs (bfd *output_bfd, | |
5100 | bfd *stub_bfd, | |
5101 | struct bfd_link_info *info, | |
5102 | bfd_signed_vma group_size, | |
5103 | asection * (*add_stub_section) (const char *, | |
5104 | asection *), | |
5105 | void (*layout_sections_again) (void)) | |
5106 | { | |
5107 | bfd_size_type stub_group_size; | |
5108 | bfd_boolean stubs_always_before_branch; | |
5109 | bfd_boolean stub_changed = FALSE; | |
5110 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
5111 | unsigned int num_erratum_835769_fixes = 0; | |
5112 | ||
5113 | /* Propagate mach to stub bfd, because it may not have been | |
5114 | finalized when we created stub_bfd. */ | |
5115 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), | |
5116 | bfd_get_mach (output_bfd)); | |
5117 | ||
5118 | /* Stash our params away. */ | |
5119 | htab->stub_bfd = stub_bfd; | |
5120 | htab->add_stub_section = add_stub_section; | |
5121 | htab->layout_sections_again = layout_sections_again; | |
5122 | stubs_always_before_branch = group_size < 0; | |
5123 | if (group_size < 0) | |
5124 | stub_group_size = -group_size; | |
5125 | else | |
5126 | stub_group_size = group_size; | |
5127 | ||
5128 | if (stub_group_size == 1) | |
5129 | { | |
5130 | /* Default values. */ | |
5131 | /* AArch64 branch range is +-128MB. The value used is 1MB less. */ | |
5132 | stub_group_size = 127 * 1024 * 1024; | |
5133 | } | |
5134 | ||
5135 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
5136 | ||
5137 | (*htab->layout_sections_again) (); | |
5138 | ||
5139 | if (htab->fix_erratum_835769) | |
5140 | { | |
5141 | bfd *input_bfd; | |
5142 | ||
5143 | for (input_bfd = info->input_bfds; | |
5144 | input_bfd != NULL; input_bfd = input_bfd->link.next) | |
5145 | { | |
5146 | if (!is_aarch64_elf (input_bfd) | |
5147 | || (input_bfd->flags & BFD_LINKER_CREATED) != 0) | |
5148 | continue; | |
5149 | ||
5150 | if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info, | |
5151 | &num_erratum_835769_fixes)) | |
5152 | return FALSE; | |
5153 | } | |
5154 | ||
5155 | _bfd_aarch64_resize_stubs (htab); | |
5156 | (*htab->layout_sections_again) (); | |
5157 | } | |
5158 | ||
5159 | if (htab->fix_erratum_843419 != ERRAT_NONE) | |
5160 | { | |
5161 | bfd *input_bfd; | |
5162 | ||
5163 | for (input_bfd = info->input_bfds; | |
5164 | input_bfd != NULL; | |
5165 | input_bfd = input_bfd->link.next) | |
5166 | { | |
5167 | asection *section; | |
5168 | ||
5169 | if (!is_aarch64_elf (input_bfd) | |
5170 | || (input_bfd->flags & BFD_LINKER_CREATED) != 0) | |
5171 | continue; | |
5172 | ||
5173 | for (section = input_bfd->sections; | |
5174 | section != NULL; | |
5175 | section = section->next) | |
5176 | if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info)) | |
5177 | return FALSE; | |
5178 | } | |
5179 | ||
5180 | _bfd_aarch64_resize_stubs (htab); | |
5181 | (*htab->layout_sections_again) (); | |
5182 | } | |
5183 | ||
5184 | while (1) | |
5185 | { | |
5186 | bfd *input_bfd; | |
5187 | ||
5188 | for (input_bfd = info->input_bfds; | |
5189 | input_bfd != NULL; input_bfd = input_bfd->link.next) | |
5190 | { | |
5191 | Elf_Internal_Shdr *symtab_hdr; | |
5192 | asection *section; | |
5193 | ||
5194 | if (!is_aarch64_elf (input_bfd) | |
5195 | || (input_bfd->flags & BFD_LINKER_CREATED) != 0) | |
5196 | continue; | |
5197 | ||
5198 | /* We'll need the symbol table in a second. */ | |
5199 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
5200 | if (symtab_hdr->sh_info == 0) | |
5201 | continue; | |
5202 | ||
5203 | /* Walk over each section attached to the input bfd. */ | |
5204 | for (section = input_bfd->sections; | |
5205 | section != NULL; section = section->next) | |
5206 | { | |
5207 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
5208 | ||
5209 | /* If there aren't any relocs, then there's nothing more | |
5210 | to do. */ | |
5211 | if ((section->flags & SEC_RELOC) == 0 | |
5212 | || section->reloc_count == 0 | |
5213 | || (section->flags & SEC_CODE) == 0) | |
5214 | continue; | |
5215 | ||
5216 | /* If this section is a link-once section that will be | |
5217 | discarded, then don't create any stubs. */ | |
5218 | if (section->output_section == NULL | |
5219 | || section->output_section->owner != output_bfd) | |
5220 | continue; | |
5221 | ||
5222 | /* Get the relocs. */ | |
5223 | internal_relocs | |
5224 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, | |
5225 | NULL, info->keep_memory); | |
5226 | if (internal_relocs == NULL) | |
5227 | goto error_ret_free_local; | |
5228 | ||
5229 | /* Now examine each relocation. */ | |
5230 | irela = internal_relocs; | |
5231 | irelaend = irela + section->reloc_count; | |
5232 | for (; irela < irelaend; irela++) | |
5233 | { | |
5234 | unsigned int r_type, r_indx; | |
5235 | enum elf_aarch64_stub_type stub_type = aarch64_stub_none; | |
5236 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
5237 | asection *sym_sec; | |
5238 | bfd_vma sym_value; | |
5239 | bfd_vma destination; | |
5240 | struct elf_aarch64_link_hash_entry *hash; | |
5241 | const char *sym_name; | |
5242 | char *stub_name; | |
5243 | const asection *id_sec; | |
5244 | unsigned char st_type; | |
5245 | bfd_size_type len; | |
5246 | unsigned branch_to_c64 = FALSE; | |
5247 | const char *suffix; | |
5248 | ||
5249 | r_type = ELFNN_R_TYPE (irela->r_info); | |
5250 | r_indx = ELFNN_R_SYM (irela->r_info); | |
5251 | ||
5252 | if (r_type >= (unsigned int) R_AARCH64_end) | |
5253 | { | |
5254 | bfd_set_error (bfd_error_bad_value); | |
5255 | error_ret_free_internal: | |
5256 | if (elf_section_data (section)->relocs == NULL) | |
5257 | free (internal_relocs); | |
5258 | goto error_ret_free_local; | |
5259 | } | |
5260 | ||
5261 | /* Only look for stubs on unconditional branch and | |
5262 | branch and link instructions. */ | |
5263 | if (!aarch64_branch_reloc_p (r_type)) | |
5264 | continue; | |
5265 | ||
5266 | /* Now determine the call target, its name, value, | |
5267 | section. */ | |
5268 | sym_sec = NULL; | |
5269 | sym_value = 0; | |
5270 | destination = 0; | |
5271 | hash = NULL; | |
5272 | sym_name = NULL; | |
5273 | if (r_indx < symtab_hdr->sh_info) | |
5274 | { | |
5275 | /* It's a local symbol. */ | |
5276 | Elf_Internal_Sym *sym = | |
5277 | bfd_sym_from_r_symndx (&htab->root.sym_cache, | |
5278 | input_bfd, r_indx); | |
5279 | if (sym == NULL) | |
5280 | goto error_ret_free_internal; | |
5281 | ||
5282 | branch_to_c64 |= (sym->st_target_internal | |
5283 | & ST_BRANCH_TO_C64); | |
5284 | ||
5285 | Elf_Internal_Shdr *hdr = | |
5286 | elf_elfsections (input_bfd)[sym->st_shndx]; | |
5287 | ||
5288 | sym_sec = hdr->bfd_section; | |
5289 | if (!sym_sec) | |
5290 | /* This is an undefined symbol. It can never | |
5291 | be resolved. */ | |
5292 | continue; | |
5293 | ||
5294 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
5295 | sym_value = sym->st_value; | |
5296 | destination = (sym_value + irela->r_addend | |
5297 | + sym_sec->output_offset | |
5298 | + sym_sec->output_section->vma); | |
5299 | st_type = ELF_ST_TYPE (sym->st_info); | |
5300 | sym_name | |
5301 | = bfd_elf_string_from_elf_section (input_bfd, | |
5302 | symtab_hdr->sh_link, | |
5303 | sym->st_name); | |
5304 | ||
5305 | /* Get the interworking stub if needed. */ | |
5306 | stub_type = aarch64_interwork_stub (r_type, | |
5307 | branch_to_c64); | |
5308 | } | |
5309 | else | |
5310 | { | |
5311 | int e_indx; | |
5312 | struct elf_aarch64_link_hash_table *globals = | |
5313 | elf_aarch64_hash_table (info); | |
5314 | ||
5315 | e_indx = r_indx - symtab_hdr->sh_info; | |
5316 | hash = ((struct elf_aarch64_link_hash_entry *) | |
5317 | elf_sym_hashes (input_bfd)[e_indx]); | |
5318 | ||
5319 | while (hash->root.root.type == bfd_link_hash_indirect | |
5320 | || hash->root.root.type == bfd_link_hash_warning) | |
5321 | hash = ((struct elf_aarch64_link_hash_entry *) | |
5322 | hash->root.root.u.i.link); | |
5323 | ||
5324 | /* Static executable. */ | |
5325 | if (globals->root.splt == NULL || hash == NULL | |
5326 | || hash->root.plt.offset == (bfd_vma) - 1) | |
5327 | { | |
5328 | branch_to_c64 |= (hash->root.target_internal | |
5329 | & ST_BRANCH_TO_C64); | |
5330 | stub_type = aarch64_interwork_stub (r_type, | |
5331 | branch_to_c64); | |
5332 | } | |
5333 | ||
5334 | if (hash->root.root.type == bfd_link_hash_defined | |
5335 | || hash->root.root.type == bfd_link_hash_defweak) | |
5336 | { | |
5337 | sym_sec = hash->root.root.u.def.section; | |
5338 | sym_value = hash->root.root.u.def.value; | |
5339 | /* For a destination in a shared library, | |
5340 | use the PLT stub as target address to | |
5341 | decide whether a branch stub is | |
5342 | needed. */ | |
5343 | if (globals->root.splt != NULL && hash != NULL | |
5344 | && hash->root.plt.offset != (bfd_vma) - 1) | |
5345 | { | |
5346 | sym_sec = globals->root.splt; | |
5347 | sym_value = hash->root.plt.offset; | |
5348 | if (sym_sec->output_section != NULL) | |
5349 | destination = (sym_value | |
5350 | + sym_sec->output_offset | |
5351 | + | |
5352 | sym_sec->output_section->vma); | |
5353 | } | |
5354 | else if (sym_sec->output_section != NULL) | |
5355 | destination = (sym_value + irela->r_addend | |
5356 | + sym_sec->output_offset | |
5357 | + sym_sec->output_section->vma); | |
5358 | } | |
5359 | else if (hash->root.root.type == bfd_link_hash_undefined | |
5360 | || (hash->root.root.type | |
5361 | == bfd_link_hash_undefweak)) | |
5362 | { | |
5363 | /* For a shared library, use the PLT stub as | |
5364 | target address to decide whether a long | |
5365 | branch stub is needed. | |
5366 | For absolute code, they cannot be handled. */ | |
5367 | ||
5368 | if (globals->root.splt != NULL && hash != NULL | |
5369 | && hash->root.plt.offset != (bfd_vma) - 1) | |
5370 | { | |
5371 | sym_sec = globals->root.splt; | |
5372 | sym_value = hash->root.plt.offset; | |
5373 | if (sym_sec->output_section != NULL) | |
5374 | destination = (sym_value | |
5375 | + sym_sec->output_offset | |
5376 | + | |
5377 | sym_sec->output_section->vma); | |
5378 | } | |
5379 | else | |
5380 | continue; | |
5381 | } | |
5382 | else | |
5383 | { | |
5384 | bfd_set_error (bfd_error_bad_value); | |
5385 | goto error_ret_free_internal; | |
5386 | } | |
5387 | st_type = ELF_ST_TYPE (hash->root.type); | |
5388 | sym_name = hash->root.root.root.string; | |
5389 | } | |
5390 | ||
5391 | /* Determine what (if any) linker stub is needed. */ | |
5392 | if (stub_type == aarch64_stub_none) | |
5393 | stub_type = aarch64_type_of_stub (section, irela, sym_sec, | |
5394 | st_type, destination); | |
5395 | ||
5396 | if (stub_type == aarch64_stub_none) | |
5397 | continue; | |
5398 | ||
5399 | /* Support for grouping stub sections. */ | |
5400 | id_sec = htab->stub_group[section->id].link_sec; | |
5401 | ||
5402 | /* Get the name of this stub. */ | |
5403 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash, | |
5404 | irela, stub_type); | |
5405 | if (!stub_name) | |
5406 | goto error_ret_free_internal; | |
5407 | ||
5408 | stub_entry = | |
5409 | aarch64_stub_hash_lookup (&htab->stub_hash_table, | |
5410 | stub_name, FALSE, FALSE); | |
5411 | if (stub_entry != NULL) | |
5412 | { | |
5413 | /* The proper stub has already been created. */ | |
5414 | free (stub_name); | |
5415 | /* Always update this stub's target since it may have | |
5416 | changed after layout. */ | |
5417 | stub_entry->target_value = sym_value + irela->r_addend; | |
5418 | ||
5419 | /* Set LSB for A64 to C64 branch. */ | |
5420 | if (branch_to_c64) | |
5421 | stub_entry->target_value |= 1; | |
5422 | ||
5423 | continue; | |
5424 | } | |
5425 | ||
5426 | stub_entry = _bfd_aarch64_add_stub_entry_in_group | |
5427 | (stub_name, section, htab); | |
5428 | if (stub_entry == NULL) | |
5429 | { | |
5430 | free (stub_name); | |
5431 | goto error_ret_free_internal; | |
5432 | } | |
5433 | ||
5434 | stub_entry->target_value = sym_value + irela->r_addend; | |
5435 | /* Set LSB for A64 to C64 branch. */ | |
5436 | if (branch_to_c64) | |
5437 | stub_entry->target_value |= 1; | |
5438 | ||
5439 | stub_entry->target_section = sym_sec; | |
5440 | stub_entry->stub_type = stub_type; | |
5441 | stub_entry->h = hash; | |
5442 | stub_entry->st_type = st_type; | |
5443 | ||
5444 | suffix = aarch64_lookup_stub_type_suffix (stub_type); | |
5445 | ||
5446 | if (sym_name == NULL) | |
5447 | sym_name = "unnamed"; | |
5448 | len = (sizeof (STUB_ENTRY_NAME) + strlen (sym_name) | |
5449 | + strlen (suffix)); | |
5450 | stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); | |
5451 | if (stub_entry->output_name == NULL) | |
5452 | { | |
5453 | free (stub_name); | |
5454 | goto error_ret_free_internal; | |
5455 | } | |
5456 | ||
5457 | snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, | |
5458 | sym_name, suffix); | |
5459 | ||
5460 | stub_changed = TRUE; | |
5461 | } | |
5462 | ||
5463 | /* We're done with the internal relocs, free them. */ | |
5464 | if (elf_section_data (section)->relocs == NULL) | |
5465 | free (internal_relocs); | |
5466 | } | |
5467 | } | |
5468 | ||
5469 | if (!stub_changed) | |
5470 | break; | |
5471 | ||
5472 | _bfd_aarch64_resize_stubs (htab); | |
5473 | ||
5474 | /* Ask the linker to do its stuff. */ | |
5475 | (*htab->layout_sections_again) (); | |
5476 | stub_changed = FALSE; | |
5477 | } | |
5478 | ||
5479 | return TRUE; | |
5480 | ||
5481 | error_ret_free_local: | |
5482 | return FALSE; | |
5483 | } | |
5484 | ||
5485 | /* Build all the stubs associated with the current output file. The | |
5486 | stubs are kept in a hash table attached to the main linker hash | |
5487 | table. We also set up the .plt entries for statically linked PIC | |
5488 | functions here. This function is called via aarch64_elf_finish in the | |
5489 | linker. */ | |
5490 | ||
5491 | bfd_boolean | |
5492 | elfNN_aarch64_build_stubs (struct bfd_link_info *info) | |
5493 | { | |
5494 | asection *stub_sec; | |
5495 | struct bfd_hash_table *table; | |
5496 | struct elf_aarch64_link_hash_table *htab; | |
5497 | ||
5498 | htab = elf_aarch64_hash_table (info); | |
5499 | ||
5500 | for (stub_sec = htab->stub_bfd->sections; | |
5501 | stub_sec != NULL; stub_sec = stub_sec->next) | |
5502 | { | |
5503 | bfd_size_type size; | |
5504 | ||
5505 | /* Ignore non-stub sections. */ | |
5506 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
5507 | continue; | |
5508 | ||
5509 | /* Allocate memory to hold the linker stubs. */ | |
5510 | size = stub_sec->size; | |
5511 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
5512 | if (stub_sec->contents == NULL && size != 0) | |
5513 | return FALSE; | |
5514 | stub_sec->size = 0; | |
5515 | ||
5516 | /* Add a branch around the stub section, and a nop, to keep it 8 byte | |
5517 | aligned, as long branch stubs contain a 64-bit address. */ | |
5518 | bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents); | |
5519 | bfd_putl32 (INSN_NOP, stub_sec->contents + 4); | |
5520 | stub_sec->size += 8; | |
5521 | } | |
5522 | ||
5523 | /* Build the stubs as directed by the stub hash table. */ | |
5524 | table = &htab->stub_hash_table; | |
5525 | ||
5526 | bfd_error_type save_error = bfd_get_error (); | |
5527 | bfd_set_error (bfd_error_no_error); | |
5528 | bfd_hash_traverse (table, aarch64_build_one_stub, info); | |
5529 | ||
5530 | if (bfd_get_error () != bfd_error_no_error) | |
5531 | return FALSE; | |
5532 | ||
5533 | bfd_set_error (save_error); | |
5534 | ||
5535 | return TRUE; | |
5536 | } | |
5537 | ||
5538 | ||
5539 | /* Add an entry to the code/data map for section SEC. */ | |
5540 | ||
5541 | static void | |
5542 | elfNN_aarch64_section_map_add (bfd *abfd, asection *sec, char type, | |
5543 | bfd_vma vma) | |
5544 | { | |
5545 | struct _aarch64_elf_section_data *sec_data = | |
5546 | elf_aarch64_section_data (sec); | |
5547 | unsigned int newidx; | |
5548 | ||
5549 | /* The aarch64 section hook was not called for this section. */ | |
5550 | if (!sec_data->elf.is_target_section_data) | |
5551 | { | |
5552 | struct _aarch64_elf_section_data *newdata = | |
5553 | bfd_zalloc (abfd, sizeof (*newdata)); | |
5554 | ||
5555 | if (newdata == NULL) | |
5556 | return; | |
5557 | ||
5558 | newdata->elf = sec_data->elf; | |
5559 | newdata->elf.is_target_section_data = TRUE; | |
5560 | free (sec_data); | |
5561 | sec->used_by_bfd = sec_data = newdata; | |
5562 | } | |
5563 | ||
5564 | if (sec_data->map == NULL) | |
5565 | { | |
5566 | sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map)); | |
5567 | sec_data->mapcount = 0; | |
5568 | sec_data->mapsize = 1; | |
5569 | } | |
5570 | ||
5571 | newidx = sec_data->mapcount++; | |
5572 | ||
5573 | if (sec_data->mapcount > sec_data->mapsize) | |
5574 | { | |
5575 | sec_data->mapsize *= 2; | |
5576 | sec_data->map = bfd_realloc_or_free | |
5577 | (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map)); | |
5578 | } | |
5579 | ||
5580 | if (sec_data->map) | |
5581 | { | |
5582 | sec_data->map[newidx].vma = vma; | |
5583 | sec_data->map[newidx].type = type; | |
5584 | } | |
5585 | } | |
5586 | ||
5587 | ||
5588 | /* Initialise maps of insn/data for input BFDs. */ | |
5589 | void | |
5590 | bfd_elfNN_aarch64_init_maps (bfd *abfd, struct bfd_link_info *info) | |
5591 | { | |
5592 | Elf_Internal_Sym *isymbuf; | |
5593 | Elf_Internal_Shdr *hdr; | |
5594 | unsigned int i, localsyms; | |
5595 | ||
5596 | /* Make sure that we are dealing with an AArch64 elf binary. */ | |
5597 | if (!is_aarch64_elf (abfd)) | |
5598 | return; | |
5599 | ||
5600 | if (elf_aarch64_tdata (abfd)->secmaps_initialised) | |
5601 | return; | |
5602 | ||
5603 | if ((abfd->flags & DYNAMIC) != 0) | |
5604 | return; | |
5605 | ||
5606 | hdr = &elf_symtab_hdr (abfd); | |
5607 | localsyms = hdr->sh_info; | |
5608 | ||
5609 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field | |
5610 | should contain the number of local symbols, which should come before any | |
5611 | global symbols. Mapping symbols are always local. */ | |
5612 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); | |
5613 | ||
5614 | /* No internal symbols read? Skip this BFD. */ | |
5615 | if (isymbuf == NULL) | |
5616 | return; | |
5617 | ||
5618 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table ((info)); | |
5619 | ||
5620 | for (i = 0; i < localsyms; i++) | |
5621 | { | |
5622 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
5623 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
5624 | const char *name; | |
5625 | ||
5626 | if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) | |
5627 | { | |
5628 | name = bfd_elf_string_from_elf_section (abfd, | |
5629 | hdr->sh_link, | |
5630 | isym->st_name); | |
5631 | ||
5632 | if (bfd_is_aarch64_special_symbol_name | |
5633 | (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) | |
5634 | { | |
5635 | elfNN_aarch64_section_map_add (abfd, sec, name[1], | |
5636 | isym->st_value); | |
5637 | if (!htab->c64_output && name[1] == 'c') | |
5638 | htab->c64_output = TRUE; | |
5639 | } | |
5640 | } | |
5641 | } | |
5642 | elf_aarch64_tdata (abfd)->secmaps_initialised = TRUE; | |
5643 | } | |
5644 | ||
5645 | static void | |
5646 | setup_plt_values (struct bfd_link_info *link_info, | |
5647 | aarch64_plt_type plt_type) | |
5648 | { | |
5649 | struct elf_aarch64_link_hash_table *globals; | |
5650 | globals = elf_aarch64_hash_table (link_info); | |
5651 | ||
5652 | /* Set up plt stubs in case we need C64 PLT. Override BTI/PAC since they're | |
5653 | not compatible. PLT stub sizes are the same as the default ones. */ | |
5654 | if (globals->c64_rel) | |
5655 | { | |
5656 | if (plt_type != PLT_NORMAL) | |
5657 | _bfd_error_handler | |
5658 | (_("ignoring C64-incompatible extensions: %s"), | |
5659 | (plt_type == PLT_BTI_PAC ? "BTI, PAC" | |
5660 | : plt_type == PLT_BTI ? "BTI" : "PAC")); | |
5661 | ||
5662 | globals->plt0_entry = elfNN_c64_small_plt0_entry; | |
5663 | globals->plt_entry = elfNN_c64_small_plt_entry; | |
5664 | return; | |
5665 | } | |
5666 | ||
5667 | if (plt_type == PLT_BTI_PAC) | |
5668 | { | |
5669 | globals->plt0_entry = elfNN_aarch64_small_plt0_bti_entry; | |
5670 | ||
5671 | /* Only in ET_EXEC we need PLTn with BTI. */ | |
5672 | if (bfd_link_pde (link_info)) | |
5673 | { | |
5674 | globals->plt_entry_size = PLT_BTI_PAC_SMALL_ENTRY_SIZE; | |
5675 | globals->plt_entry = elfNN_aarch64_small_plt_bti_pac_entry; | |
5676 | } | |
5677 | else | |
5678 | { | |
5679 | globals->plt_entry_size = PLT_PAC_SMALL_ENTRY_SIZE; | |
5680 | globals->plt_entry = elfNN_aarch64_small_plt_pac_entry; | |
5681 | } | |
5682 | } | |
5683 | else if (plt_type == PLT_BTI) | |
5684 | { | |
5685 | globals->plt0_entry = elfNN_aarch64_small_plt0_bti_entry; | |
5686 | ||
5687 | /* Only in ET_EXEC we need PLTn with BTI. */ | |
5688 | if (bfd_link_pde (link_info)) | |
5689 | { | |
5690 | globals->plt_entry_size = PLT_BTI_SMALL_ENTRY_SIZE; | |
5691 | globals->plt_entry = elfNN_aarch64_small_plt_bti_entry; | |
5692 | } | |
5693 | } | |
5694 | else if (plt_type == PLT_PAC) | |
5695 | { | |
5696 | globals->plt_entry_size = PLT_PAC_SMALL_ENTRY_SIZE; | |
5697 | globals->plt_entry = elfNN_aarch64_small_plt_pac_entry; | |
5698 | } | |
5699 | } | |
5700 | ||
5701 | /* Set option values needed during linking. */ | |
5702 | void | |
5703 | bfd_elfNN_aarch64_set_options (struct bfd *output_bfd, | |
5704 | struct bfd_link_info *link_info, | |
5705 | int no_enum_warn, | |
5706 | int no_wchar_warn, int pic_veneer, | |
5707 | int fix_erratum_835769, | |
5708 | erratum_84319_opts fix_erratum_843419, | |
5709 | int no_apply_dynamic_relocs, | |
5710 | aarch64_bti_pac_info bp_info) | |
5711 | { | |
5712 | struct elf_aarch64_link_hash_table *globals; | |
5713 | ||
5714 | globals = elf_aarch64_hash_table (link_info); | |
5715 | globals->pic_veneer = pic_veneer; | |
5716 | globals->fix_erratum_835769 = fix_erratum_835769; | |
5717 | /* If the default options are used, then ERRAT_ADR will be set by default | |
5718 | which will enable the ADRP->ADR workaround for the erratum 843419 | |
5719 | workaround. */ | |
5720 | globals->fix_erratum_843419 = fix_erratum_843419; | |
5721 | globals->no_apply_dynamic_relocs = no_apply_dynamic_relocs; | |
5722 | globals->c64_rel = 0; | |
5723 | ||
5724 | BFD_ASSERT (is_aarch64_elf (output_bfd)); | |
5725 | elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; | |
5726 | elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; | |
5727 | ||
5728 | switch (bp_info.bti_type) | |
5729 | { | |
5730 | case BTI_WARN: | |
5731 | elf_aarch64_tdata (output_bfd)->no_bti_warn = 0; | |
5732 | elf_aarch64_tdata (output_bfd)->gnu_and_prop | |
5733 | |= GNU_PROPERTY_AARCH64_FEATURE_1_BTI; | |
5734 | break; | |
5735 | ||
5736 | default: | |
5737 | break; | |
5738 | } | |
5739 | elf_aarch64_tdata (output_bfd)->plt_type = bp_info.plt_type; | |
5740 | elf_aarch64_tdata (output_bfd)->secmaps_initialised = FALSE; | |
5741 | } | |
5742 | ||
5743 | static bfd_vma | |
5744 | aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, | |
5745 | struct elf_aarch64_link_hash_table | |
5746 | *globals, struct bfd_link_info *info, | |
5747 | bfd_vma value, bfd *output_bfd, | |
5748 | bfd_boolean *unresolved_reloc_p) | |
5749 | { | |
5750 | bfd_vma off = (bfd_vma) - 1; | |
5751 | asection *basegot = globals->root.sgot; | |
5752 | bfd_boolean dyn = globals->root.dynamic_sections_created; | |
5753 | ||
5754 | if (h != NULL) | |
5755 | { | |
5756 | BFD_ASSERT (basegot != NULL); | |
5757 | off = h->got.offset; | |
5758 | BFD_ASSERT (off != (bfd_vma) - 1); | |
5759 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) | |
5760 | || (bfd_link_pic (info) | |
5761 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
5762 | || (ELF_ST_VISIBILITY (h->other) | |
5763 | && h->root.type == bfd_link_hash_undefweak)) | |
5764 | { | |
5765 | /* This is actually a static link, or it is a -Bsymbolic link | |
5766 | and the symbol is defined locally. We must initialize this | |
5767 | entry in the global offset table. Since the offset must | |
5768 | always be a multiple of 8 (4 in the case of ILP32), we use | |
5769 | the least significant bit to record whether we have | |
5770 | initialized it already. | |
5771 | When doing a dynamic link, we create a .rel(a).got relocation | |
5772 | entry to initialize the value. This is done in the | |
5773 | finish_dynamic_symbol routine. */ | |
5774 | if ((off & 1) != 0) | |
5775 | off &= ~1; | |
5776 | else | |
5777 | { | |
5778 | bfd_put_NN (output_bfd, value, basegot->contents + off); | |
5779 | h->got.offset |= 1; | |
5780 | } | |
5781 | } | |
5782 | else | |
5783 | *unresolved_reloc_p = FALSE; | |
5784 | ||
5785 | off = off + basegot->output_section->vma + basegot->output_offset; | |
5786 | } | |
5787 | ||
5788 | return off; | |
5789 | } | |
5790 | ||
5791 | /* Change R_TYPE to a more efficient access model where possible, | |
5792 | return the new reloc type. */ | |
5793 | ||
5794 | static bfd_reloc_code_real_type | |
5795 | aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type, | |
5796 | struct bfd_link_info *info, | |
5797 | struct elf_link_hash_entry *h, | |
5798 | bfd_boolean morello_reloc) | |
5799 | { | |
5800 | bfd_boolean is_local = h == NULL; | |
5801 | ||
5802 | switch (r_type) | |
5803 | { | |
5804 | case BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20: | |
5805 | return (is_local || !bfd_link_pic (info) | |
5806 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 | |
5807 | : r_type); | |
5808 | ||
5809 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
5810 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
5811 | return (is_local | |
5812 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 | |
5813 | : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21); | |
5814 | ||
5815 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: | |
5816 | return (is_local | |
5817 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC | |
5818 | : r_type); | |
5819 | ||
5820 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: | |
5821 | return (is_local | |
5822 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 | |
5823 | : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19); | |
5824 | ||
5825 | case BFD_RELOC_AARCH64_TLSDESC_LDR: | |
5826 | return (is_local | |
5827 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC | |
5828 | : BFD_RELOC_AARCH64_NONE); | |
5829 | ||
5830 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: | |
5831 | return (is_local | |
5832 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC | |
5833 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC); | |
5834 | ||
5835 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: | |
5836 | return (is_local | |
5837 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 | |
5838 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1); | |
5839 | ||
5840 | case BFD_RELOC_MORELLO_TLSDESC_LD128_LO12: | |
5841 | return ((is_local || !bfd_link_pie (info) | |
5842 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type)); | |
5843 | ||
5844 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: | |
5845 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
5846 | return (is_local | |
5847 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC | |
5848 | : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC); | |
5849 | ||
5850 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
5851 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; | |
5852 | ||
5853 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: | |
5854 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; | |
5855 | ||
5856 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
5857 | return r_type; | |
5858 | ||
5859 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: | |
5860 | return (is_local | |
5861 | ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 | |
5862 | : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19); | |
5863 | ||
5864 | case BFD_RELOC_MORELLO_TLSDESC_CALL: | |
5865 | return ((is_local || !bfd_link_pie (info)) | |
5866 | ? BFD_RELOC_AARCH64_NONE : r_type); | |
5867 | ||
5868 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: | |
5869 | if (morello_reloc && !is_local && bfd_link_pie (info)) | |
5870 | return r_type; | |
5871 | /* Fall through. */ | |
5872 | case BFD_RELOC_AARCH64_TLSDESC_ADD: | |
5873 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
5874 | /* Instructions with these relocations will be fully resolved during the | |
5875 | transition into either a NOP in the A64 case or movk and add in | |
5876 | C64. */ | |
5877 | return BFD_RELOC_AARCH64_NONE; | |
5878 | ||
5879 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: | |
5880 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: | |
5881 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: | |
5882 | return is_local ? BFD_RELOC_AARCH64_NONE : r_type; | |
5883 | ||
5884 | #if ARCH_SIZE == 64 | |
5885 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: | |
5886 | return is_local | |
5887 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC | |
5888 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC; | |
5889 | ||
5890 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: | |
5891 | return is_local | |
5892 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 | |
5893 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1; | |
5894 | #endif | |
5895 | ||
5896 | default: | |
5897 | break; | |
5898 | } | |
5899 | ||
5900 | return r_type; | |
5901 | } | |
5902 | ||
5903 | static unsigned int | |
5904 | aarch64_reloc_got_type (bfd_reloc_code_real_type r_type) | |
5905 | { | |
5906 | switch (r_type) | |
5907 | { | |
5908 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
5909 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
5910 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: | |
5911 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
5912 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: | |
5913 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: | |
5914 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
5915 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: | |
5916 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: | |
5917 | return GOT_NORMAL; | |
5918 | ||
5919 | case BFD_RELOC_MORELLO_ADR_GOT_PAGE: | |
5920 | case BFD_RELOC_MORELLO_LD128_GOT_LO12_NC: | |
5921 | return GOT_CAP; | |
5922 | ||
5923 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
5924 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
5925 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: | |
5926 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: | |
5927 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: | |
5928 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: | |
5929 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: | |
5930 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: | |
5931 | return GOT_TLS_GD; | |
5932 | ||
5933 | case BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20: | |
5934 | case BFD_RELOC_MORELLO_TLSDESC_CALL: | |
5935 | case BFD_RELOC_MORELLO_TLSDESC_LD128_LO12: | |
5936 | return GOT_TLSDESC_GD | GOT_CAP; | |
5937 | ||
5938 | case BFD_RELOC_AARCH64_TLSDESC_ADD: | |
5939 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: | |
5940 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
5941 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: | |
5942 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
5943 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
5944 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: | |
5945 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: | |
5946 | case BFD_RELOC_AARCH64_TLSDESC_LDR: | |
5947 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: | |
5948 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: | |
5949 | return GOT_TLSDESC_GD; | |
5950 | ||
5951 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
5952 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: | |
5953 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
5954 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
5955 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
5956 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: | |
5957 | return GOT_TLS_IE; | |
5958 | ||
5959 | default: | |
5960 | break; | |
5961 | } | |
5962 | return GOT_UNKNOWN; | |
5963 | } | |
5964 | ||
5965 | static bfd_boolean | |
5966 | aarch64_can_relax_tls (bfd *input_bfd, | |
5967 | struct bfd_link_info *info, | |
5968 | const Elf_Internal_Rela *rel, | |
5969 | struct elf_link_hash_entry *h, | |
5970 | unsigned long r_symndx) | |
5971 | { | |
5972 | unsigned int symbol_got_type; | |
5973 | unsigned int reloc_got_type; | |
5974 | ||
5975 | bfd_reloc_code_real_type bfd_r_type | |
5976 | = elfNN_aarch64_bfd_reloc_from_type (input_bfd, | |
5977 | ELFNN_R_TYPE (rel->r_info)); | |
5978 | ||
5979 | if (! IS_AARCH64_TLS_RELAX_RELOC (bfd_r_type)) | |
5980 | return FALSE; | |
5981 | ||
5982 | symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx); | |
5983 | reloc_got_type = aarch64_reloc_got_type (bfd_r_type); | |
5984 | ||
5985 | if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) | |
5986 | return TRUE; | |
5987 | ||
5988 | if (!bfd_link_executable (info)) | |
5989 | return FALSE; | |
5990 | ||
5991 | if (h && h->root.type == bfd_link_hash_undefweak) | |
5992 | return FALSE; | |
5993 | ||
5994 | return TRUE; | |
5995 | } | |
5996 | ||
5997 | /* Given the relocation code R_TYPE, return the relaxed bfd reloc | |
5998 | enumerator. */ | |
5999 | ||
6000 | static bfd_reloc_code_real_type | |
6001 | aarch64_tls_transition (bfd *input_bfd, | |
6002 | struct bfd_link_info *info, | |
6003 | const Elf_Internal_Rela *rel, | |
6004 | struct elf_link_hash_entry *h, | |
6005 | unsigned long r_symndx) | |
6006 | { | |
6007 | bfd_reloc_code_real_type bfd_r_type | |
6008 | = elfNN_aarch64_bfd_reloc_from_type (input_bfd, | |
6009 | ELFNN_R_TYPE (rel->r_info)); | |
6010 | ||
6011 | if (! aarch64_can_relax_tls (input_bfd, info, rel, h, r_symndx)) | |
6012 | return bfd_r_type; | |
6013 | ||
6014 | bfd_boolean morello_reloc = (bfd_r_type == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 | |
6015 | && (ELFNN_R_TYPE (rel[1].r_info) | |
6016 | == MORELLO_R (TLSDESC_CALL))); | |
6017 | ||
6018 | /* GD -> IE is not supported for Morello TLSDESC yet. We do however allow | |
6019 | lowering of GD -> LE for static non-pie executables. XXX It ought to be | |
6020 | safe to do this for A64 as well but it is not implemented yet. */ | |
6021 | if (h != NULL && morello_reloc && bfd_link_pie (info)) | |
6022 | return bfd_r_type; | |
6023 | ||
6024 | return aarch64_tls_transition_without_check (bfd_r_type, info, h, | |
6025 | morello_reloc); | |
6026 | } | |
6027 | ||
6028 | /* Return the base VMA address which should be subtracted from real addresses | |
6029 | when resolving R_AARCH64_TLS_DTPREL relocation. */ | |
6030 | ||
6031 | static bfd_vma | |
6032 | dtpoff_base (struct bfd_link_info *info) | |
6033 | { | |
6034 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
6035 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
6036 | return elf_hash_table (info)->tls_sec->vma; | |
6037 | } | |
6038 | ||
6039 | /* Return the base VMA address which should be subtracted from real addresses | |
6040 | when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ | |
6041 | ||
6042 | static bfd_vma | |
6043 | tpoff_base (struct bfd_link_info *info) | |
6044 | { | |
6045 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
6046 | ||
6047 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
6048 | BFD_ASSERT (htab->tls_sec != NULL); | |
6049 | ||
6050 | bfd_vma base = align_power ((bfd_vma) TCB_SIZE, | |
6051 | htab->tls_sec->alignment_power); | |
6052 | return htab->tls_sec->vma - base; | |
6053 | } | |
6054 | ||
6055 | static bfd_vma * | |
6056 | symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6057 | unsigned long r_symndx) | |
6058 | { | |
6059 | /* Calculate the address of the GOT entry for symbol | |
6060 | referred to in h. */ | |
6061 | if (h != NULL) | |
6062 | return &h->got.offset; | |
6063 | else | |
6064 | { | |
6065 | /* local symbol */ | |
6066 | struct elf_aarch64_local_symbol *l; | |
6067 | ||
6068 | l = elf_aarch64_locals (input_bfd); | |
6069 | return &l[r_symndx].got_offset; | |
6070 | } | |
6071 | } | |
6072 | ||
6073 | static void | |
6074 | symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6075 | unsigned long r_symndx) | |
6076 | { | |
6077 | bfd_vma *p; | |
6078 | p = symbol_got_offset_ref (input_bfd, h, r_symndx); | |
6079 | *p |= 1; | |
6080 | } | |
6081 | ||
6082 | static int | |
6083 | symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6084 | unsigned long r_symndx) | |
6085 | { | |
6086 | bfd_vma value; | |
6087 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); | |
6088 | return value & 1; | |
6089 | } | |
6090 | ||
6091 | static bfd_vma | |
6092 | symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6093 | unsigned long r_symndx) | |
6094 | { | |
6095 | bfd_vma value; | |
6096 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); | |
6097 | value &= ~1; | |
6098 | return value; | |
6099 | } | |
6100 | ||
6101 | static bfd_vma * | |
6102 | symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6103 | unsigned long r_symndx) | |
6104 | { | |
6105 | /* Calculate the address of the GOT entry for symbol | |
6106 | referred to in h. */ | |
6107 | if (h != NULL) | |
6108 | { | |
6109 | struct elf_aarch64_link_hash_entry *eh; | |
6110 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
6111 | return &eh->tlsdesc_got_jump_table_offset; | |
6112 | } | |
6113 | else | |
6114 | { | |
6115 | /* local symbol */ | |
6116 | struct elf_aarch64_local_symbol *l; | |
6117 | ||
6118 | l = elf_aarch64_locals (input_bfd); | |
6119 | return &l[r_symndx].tlsdesc_got_jump_table_offset; | |
6120 | } | |
6121 | } | |
6122 | ||
6123 | static void | |
6124 | symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6125 | unsigned long r_symndx) | |
6126 | { | |
6127 | bfd_vma *p; | |
6128 | p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
6129 | *p |= 1; | |
6130 | } | |
6131 | ||
6132 | static int | |
6133 | symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, | |
6134 | struct elf_link_hash_entry *h, | |
6135 | unsigned long r_symndx) | |
6136 | { | |
6137 | bfd_vma value; | |
6138 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
6139 | return value & 1; | |
6140 | } | |
6141 | ||
6142 | static bfd_vma | |
6143 | symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, | |
6144 | unsigned long r_symndx) | |
6145 | { | |
6146 | bfd_vma value; | |
6147 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
6148 | value &= ~1; | |
6149 | return value; | |
6150 | } | |
6151 | ||
6152 | /* Data for make_branch_to_erratum_835769_stub(). */ | |
6153 | ||
6154 | struct erratum_835769_branch_to_stub_data | |
6155 | { | |
6156 | struct bfd_link_info *info; | |
6157 | asection *output_section; | |
6158 | bfd_byte *contents; | |
6159 | }; | |
6160 | ||
6161 | /* Helper to insert branches to erratum 835769 stubs in the right | |
6162 | places for a particular section. */ | |
6163 | ||
6164 | static bfd_boolean | |
6165 | make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry, | |
6166 | void *in_arg) | |
6167 | { | |
6168 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
6169 | struct erratum_835769_branch_to_stub_data *data; | |
6170 | bfd_byte *contents; | |
6171 | unsigned long branch_insn = 0; | |
6172 | bfd_vma veneered_insn_loc, veneer_entry_loc; | |
6173 | bfd_signed_vma branch_offset; | |
6174 | unsigned int target; | |
6175 | bfd *abfd; | |
6176 | ||
6177 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; | |
6178 | data = (struct erratum_835769_branch_to_stub_data *) in_arg; | |
6179 | ||
6180 | if (stub_entry->target_section != data->output_section | |
6181 | || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer) | |
6182 | return TRUE; | |
6183 | ||
6184 | contents = data->contents; | |
6185 | veneered_insn_loc = stub_entry->target_section->output_section->vma | |
6186 | + stub_entry->target_section->output_offset | |
6187 | + stub_entry->target_value; | |
6188 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma | |
6189 | + stub_entry->stub_sec->output_offset | |
6190 | + stub_entry->stub_offset; | |
6191 | branch_offset = veneer_entry_loc - veneered_insn_loc; | |
6192 | ||
6193 | abfd = stub_entry->target_section->owner; | |
6194 | if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) | |
6195 | _bfd_error_handler | |
6196 | (_("%pB: error: erratum 835769 stub out " | |
6197 | "of range (input file too large)"), abfd); | |
6198 | ||
6199 | target = stub_entry->target_value; | |
6200 | branch_insn = 0x14000000; | |
6201 | branch_offset >>= 2; | |
6202 | branch_offset &= 0x3ffffff; | |
6203 | branch_insn |= branch_offset; | |
6204 | bfd_putl32 (branch_insn, &contents[target]); | |
6205 | ||
6206 | return TRUE; | |
6207 | } | |
6208 | ||
6209 | ||
6210 | static bfd_boolean | |
6211 | _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry, | |
6212 | void *in_arg) | |
6213 | { | |
6214 | struct elf_aarch64_stub_hash_entry *stub_entry | |
6215 | = (struct elf_aarch64_stub_hash_entry *) gen_entry; | |
6216 | struct erratum_835769_branch_to_stub_data *data | |
6217 | = (struct erratum_835769_branch_to_stub_data *) in_arg; | |
6218 | struct bfd_link_info *info; | |
6219 | struct elf_aarch64_link_hash_table *htab; | |
6220 | bfd_byte *contents; | |
6221 | asection *section; | |
6222 | bfd *abfd; | |
6223 | bfd_vma place; | |
6224 | uint32_t insn; | |
6225 | ||
6226 | info = data->info; | |
6227 | contents = data->contents; | |
6228 | section = data->output_section; | |
6229 | ||
6230 | htab = elf_aarch64_hash_table (info); | |
6231 | ||
6232 | if (stub_entry->target_section != section | |
6233 | || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer) | |
6234 | return TRUE; | |
6235 | ||
6236 | BFD_ASSERT (((htab->fix_erratum_843419 & ERRAT_ADRP) && stub_entry->stub_sec) | |
6237 | || (htab->fix_erratum_843419 & ERRAT_ADR)); | |
6238 | ||
6239 | /* Only update the stub section if we have one. We should always have one if | |
6240 | we're allowed to use the ADRP errata workaround, otherwise it is not | |
6241 | required. */ | |
6242 | if (stub_entry->stub_sec) | |
6243 | { | |
6244 | insn = bfd_getl32 (contents + stub_entry->target_value); | |
6245 | bfd_putl32 (insn, | |
6246 | stub_entry->stub_sec->contents + stub_entry->stub_offset); | |
6247 | } | |
6248 | ||
6249 | place = (section->output_section->vma + section->output_offset | |
6250 | + stub_entry->adrp_offset); | |
6251 | insn = bfd_getl32 (contents + stub_entry->adrp_offset); | |
6252 | ||
6253 | if (!_bfd_aarch64_adrp_p (insn)) | |
6254 | abort (); | |
6255 | ||
6256 | bfd_signed_vma imm = | |
6257 | (_bfd_aarch64_sign_extend | |
6258 | ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33) | |
6259 | - (place & 0xfff)); | |
6260 | ||
6261 | if ((htab->fix_erratum_843419 & ERRAT_ADR) | |
6262 | && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM)) | |
6263 | { | |
6264 | insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm, 0) | |
6265 | | AARCH64_RT (insn)); | |
6266 | bfd_putl32 (insn, contents + stub_entry->adrp_offset); | |
6267 | /* Stub is not needed, don't map it out. */ | |
6268 | stub_entry->stub_type = aarch64_stub_none; | |
6269 | } | |
6270 | else if (htab->fix_erratum_843419 & ERRAT_ADRP) | |
6271 | { | |
6272 | bfd_vma veneered_insn_loc; | |
6273 | bfd_vma veneer_entry_loc; | |
6274 | bfd_signed_vma branch_offset; | |
6275 | uint32_t branch_insn; | |
6276 | ||
6277 | veneered_insn_loc = stub_entry->target_section->output_section->vma | |
6278 | + stub_entry->target_section->output_offset | |
6279 | + stub_entry->target_value; | |
6280 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma | |
6281 | + stub_entry->stub_sec->output_offset | |
6282 | + stub_entry->stub_offset; | |
6283 | branch_offset = veneer_entry_loc - veneered_insn_loc; | |
6284 | ||
6285 | abfd = stub_entry->target_section->owner; | |
6286 | if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) | |
6287 | _bfd_error_handler | |
6288 | (_("%pB: error: erratum 843419 stub out " | |
6289 | "of range (input file too large)"), abfd); | |
6290 | ||
6291 | branch_insn = 0x14000000; | |
6292 | branch_offset >>= 2; | |
6293 | branch_offset &= 0x3ffffff; | |
6294 | branch_insn |= branch_offset; | |
6295 | bfd_putl32 (branch_insn, contents + stub_entry->target_value); | |
6296 | } | |
6297 | else | |
6298 | { | |
6299 | abfd = stub_entry->target_section->owner; | |
6300 | _bfd_error_handler | |
6301 | (_("%pB: error: erratum 843419 immediate 0x%" BFD_VMA_FMT "x " | |
6302 | "out of range for ADR (input file too large) and " | |
6303 | "--fix-cortex-a53-843419=adr used. Run the linker with " | |
6304 | "--fix-cortex-a53-843419=full instead"), abfd, imm); | |
6305 | bfd_set_error (bfd_error_bad_value); | |
6306 | /* This function is called inside a hashtable traversal and the error | |
6307 | handlers called above turn into non-fatal errors. Which means this | |
6308 | case ld returns an exit code 0 and also produces a broken object file. | |
6309 | To prevent this, issue a hard abort. */ | |
6310 | BFD_FAIL (); | |
6311 | } | |
6312 | return TRUE; | |
6313 | } | |
6314 | ||
6315 | ||
6316 | static bfd_boolean | |
6317 | elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6318 | struct bfd_link_info *link_info, | |
6319 | asection *sec, | |
6320 | bfd_byte *contents) | |
6321 | ||
6322 | { | |
6323 | struct elf_aarch64_link_hash_table *globals = | |
6324 | elf_aarch64_hash_table (link_info); | |
6325 | ||
6326 | if (globals == NULL) | |
6327 | return FALSE; | |
6328 | ||
6329 | /* Fix code to point to erratum 835769 stubs. */ | |
6330 | if (globals->fix_erratum_835769) | |
6331 | { | |
6332 | struct erratum_835769_branch_to_stub_data data; | |
6333 | ||
6334 | data.info = link_info; | |
6335 | data.output_section = sec; | |
6336 | data.contents = contents; | |
6337 | bfd_hash_traverse (&globals->stub_hash_table, | |
6338 | make_branch_to_erratum_835769_stub, &data); | |
6339 | } | |
6340 | ||
6341 | if (globals->fix_erratum_843419) | |
6342 | { | |
6343 | struct erratum_835769_branch_to_stub_data data; | |
6344 | ||
6345 | data.info = link_info; | |
6346 | data.output_section = sec; | |
6347 | data.contents = contents; | |
6348 | bfd_hash_traverse (&globals->stub_hash_table, | |
6349 | _bfd_aarch64_erratum_843419_branch_to_stub, &data); | |
6350 | } | |
6351 | ||
6352 | return FALSE; | |
6353 | } | |
6354 | ||
6355 | /* Return TRUE if RELOC is a relocation against the base of GOT table. */ | |
6356 | ||
6357 | static bfd_boolean | |
6358 | aarch64_relocation_aginst_gp_p (bfd_reloc_code_real_type reloc) | |
6359 | { | |
6360 | return (reloc == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14 | |
6361 | || reloc == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15 | |
6362 | || reloc == BFD_RELOC_AARCH64_LD64_GOTOFF_LO15 | |
6363 | || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC | |
6364 | || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G1); | |
6365 | } | |
6366 | ||
6367 | /* Build capability meta data, i.e. size and permissions for a capability. */ | |
6368 | ||
6369 | static bfd_vma | |
6370 | cap_meta (size_t size, const asection *sec, bfd_boolean *guessed) | |
6371 | { | |
6372 | ||
6373 | if (size >= (1ULL << 56)) | |
6374 | return (bfd_vma) -1; | |
6375 | ||
6376 | /* N.b. We are only ever using this function for Morello. | |
6377 | Morello is little-endian. | |
6378 | We are returning a 64bit sized integer. | |
6379 | The format this metadata is supposed to fit is | |
6380 | | 56 bit length | 8 bit permissions | | |
6381 | This means that (in little endian layout) we need to put the 56 bit size | |
6382 | in the *lower* bits of the uint64_t. */ | |
6383 | uint64_t flags = 0; | |
6384 | if (sec->flags & SEC_CODE) | |
6385 | flags = 4; | |
6386 | else if (sec->flags & SEC_READONLY | |
6387 | || sec->flags & SEC_ROM) | |
6388 | flags = 1; | |
6389 | else if (sec->flags & SEC_ALLOC) | |
6390 | flags = 2; | |
6391 | ||
6392 | /* We should usually be able to derive a valid set of permissions | |
6393 | from the section flags. We know that when a relocation is against an | |
6394 | SHN_ABS symbol the section has no associated flags and we must guess. | |
6395 | ||
6396 | As it stands we don't know of any other instances where we do not have | |
6397 | permission flags on a section. We choose to allow instances that we do | |
6398 | not know of rather than abort on them so that if the guess is correct we | |
6399 | don't hamper anyone progressing. */ | |
6400 | if (flags == 0) | |
6401 | { | |
6402 | flags = 2; | |
6403 | *guessed = TRUE; | |
6404 | } | |
6405 | ||
6406 | return size | (flags << 56); | |
6407 | } | |
6408 | ||
6409 | enum c64_section_perm_type { | |
6410 | C64_SYM_UNKNOWN = 0, | |
6411 | C64_SYM_STANDARD, | |
6412 | C64_SYM_LINKER_DEF, | |
6413 | C64_SYM_LDSCRIPT_DEF, | |
6414 | C64_SYM_LDSCRIPT_START, | |
6415 | }; | |
6416 | ||
6417 | static enum c64_section_perm_type | |
6418 | c64_symbol_section_adjustment (struct elf_link_hash_entry *h, bfd_vma value, | |
6419 | asection *sym_sec, asection **ret_sec, | |
6420 | struct bfd_link_info *info) | |
6421 | { | |
6422 | if (!sym_sec) | |
6423 | return C64_SYM_UNKNOWN; | |
6424 | ||
6425 | *ret_sec = sym_sec; | |
6426 | if (!h) | |
6427 | return C64_SYM_STANDARD; | |
6428 | ||
6429 | /* Linker defined symbols are always at the start of the section they | |
6430 | track. */ | |
6431 | if (h->root.linker_def) | |
6432 | return C64_SYM_LINKER_DEF; | |
6433 | else if (h->root.ldscript_def) | |
6434 | { | |
6435 | const char *name = h->root.root.string; | |
6436 | size_t len = strlen (name); | |
6437 | ||
6438 | bfd_vma size = sym_sec->size - (value - sym_sec->vma); | |
6439 | /* The special case: the symbol is at the end of the section. | |
6440 | This could either mean that it is an end symbol or it is the | |
6441 | start of the output section following the symbol. We try to | |
6442 | guess if it is a start of the next section by reading its | |
6443 | name. This is a compatibility hack, ideally linker scripts | |
6444 | should be written such that start symbols are defined within | |
6445 | the output section it intends to track. */ | |
6446 | if (size == 0 | |
6447 | && (len > 8 && name[0] == '_' && name[1] == '_' | |
6448 | && (!strncmp (name + 2, "start_", 6) | |
6449 | || !strcmp (name + len - 6, "_start")))) | |
6450 | { | |
6451 | asection *s = bfd_sections_find_if (info->output_bfd, | |
6452 | section_start_symbol, | |
6453 | &value); | |
6454 | if (s != NULL) | |
6455 | { | |
6456 | *ret_sec = s; | |
6457 | return C64_SYM_LDSCRIPT_START; | |
6458 | } | |
6459 | } | |
6460 | return C64_SYM_LDSCRIPT_DEF; | |
6461 | } | |
6462 | return C64_SYM_STANDARD; | |
6463 | } | |
6464 | ||
6465 | static bfd_reloc_status_type | |
6466 | c64_fixup_frag (bfd *input_bfd, struct bfd_link_info *info, | |
6467 | bfd_reloc_code_real_type bfd_r_type, Elf_Internal_Sym *sym, | |
6468 | struct elf_link_hash_entry *h, asection *sym_sec, | |
6469 | asection *reloc_sec, bfd_byte *frag_loc, bfd_vma value, | |
6470 | bfd_signed_vma addend, bfd_vma r_offset) | |
6471 | { | |
6472 | BFD_ASSERT (h || sym); | |
6473 | bfd_vma size = sym ? sym->st_size : h->size; | |
6474 | asection *perm_sec = sym_sec; | |
6475 | bfd_boolean bounds_ok = FALSE; | |
6476 | ||
6477 | const int aarch64_reloc_idx = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
6478 | const char *reloc_name = elfNN_aarch64_howto_table[aarch64_reloc_idx].name; | |
6479 | const char *sym_name; | |
6480 | ||
6481 | if (sym) | |
6482 | { | |
6483 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_bfd); | |
6484 | sym_name = (bfd_elf_string_from_elf_section (input_bfd, | |
6485 | symtab_hdr->sh_link, | |
6486 | sym->st_name)); | |
6487 | } | |
6488 | else | |
6489 | sym_name = h->root.root.string; | |
6490 | ||
6491 | if (size == 0 && sym_sec) | |
6492 | { | |
6493 | bounds_ok = TRUE; | |
6494 | enum c64_section_perm_type type | |
6495 | = c64_symbol_section_adjustment (h, value, sym_sec, &perm_sec, info); | |
6496 | ||
6497 | switch (type) | |
6498 | { | |
6499 | case C64_SYM_STANDARD: | |
6500 | break; | |
6501 | case C64_SYM_LINKER_DEF: | |
6502 | size = perm_sec->output_section->size; | |
6503 | break; | |
6504 | case C64_SYM_LDSCRIPT_DEF: | |
6505 | size = perm_sec->size - (value - perm_sec->vma); | |
6506 | break; | |
6507 | case C64_SYM_LDSCRIPT_START: | |
6508 | size = perm_sec->size; | |
6509 | break; | |
6510 | default: | |
6511 | abort (); | |
6512 | } | |
6513 | } | |
6514 | ||
6515 | /* Negative addends are not allowed for capability symbols. */ | |
6516 | if (addend < 0 || (bfd_vma) addend > size) | |
6517 | return bfd_reloc_outofrange; | |
6518 | ||
6519 | bfd_vma base = value, limit = value + size; | |
6520 | unsigned align = 0; | |
6521 | ||
6522 | if (!bounds_ok && !c64_valid_cap_range (&base, &limit, &align)) | |
6523 | { | |
6524 | /* Just warn about this. It's not a requirement that bounds on | |
6525 | objects should be precise, so there's no reason to error out on | |
6526 | such an object. */ | |
6527 | /* xgettext:c-format */ | |
6528 | _bfd_error_handler | |
6529 | (_("%pB: capability range for '%s' may exceed object bounds"), | |
6530 | input_bfd, sym_name); | |
6531 | } | |
6532 | ||
6533 | if (perm_sec && perm_sec->flags & SEC_CODE) | |
6534 | { | |
6535 | /* Any symbol pointing into an executable section gets bounds according | |
6536 | to PCC. In this case the relocation is set up so that the value is | |
6537 | the base of the PCC, the addend is the offset from the PCC base to the | |
6538 | VA that we want, and the size is the length of the PCC range. | |
6539 | In this function we only use `value` to check the bounds make sense, | |
6540 | which is somewhat superfluous when we're using pcc_high and pcc_low | |
6541 | since we already enforced that in elfNN_c64_resize_sections. No harm | |
6542 | in instead checking that the bounds on the object that were requested | |
6543 | made sense even if they were overridden because this symbol points | |
6544 | into an executable section. | |
6545 | ||
6546 | `size` on the other hand is part of the fragment that we output to and | |
6547 | we need to change it in order to have functions that can access global | |
6548 | data or jump to other functions. */ | |
6549 | size = pcc_high - pcc_low; | |
6550 | } | |
6551 | ||
6552 | if (perm_sec != NULL) | |
6553 | { | |
6554 | bfd_boolean permissions_guessed = FALSE; | |
6555 | bfd_vma frag = cap_meta (size, perm_sec, &permissions_guessed); | |
6556 | ||
6557 | if (frag == (bfd_vma) -1) | |
6558 | return bfd_reloc_outofrange; | |
6559 | ||
6560 | if (permissions_guessed) | |
6561 | { | |
6562 | _bfd_error_handler (_("%pB(%pA+%#" PRIx64 "): " | |
6563 | "warning: relocation %s against symbol '%s' in " | |
6564 | "section without permission flags '%s'. " | |
6565 | "Assuming Read-Write."), | |
6566 | input_bfd, reloc_sec, r_offset, reloc_name, | |
6567 | sym_name, perm_sec->name); | |
6568 | } | |
6569 | ||
6570 | bfd_put_64 (input_bfd, frag, frag_loc); | |
6571 | } | |
6572 | ||
6573 | return bfd_reloc_continue; | |
6574 | } | |
6575 | ||
6576 | /* Given either a local symbol SYM or global symbol H, do we need to adjust | |
6577 | capability relocations against the symbol due to the fact that it points to | |
6578 | a code section? */ | |
6579 | static bfd_boolean | |
6580 | c64_symbol_adjust (struct elf_link_hash_entry *h, | |
6581 | bfd_vma value, asection *sym_sec, struct bfd_link_info *info, | |
6582 | bfd_vma *adjust_addr) | |
6583 | { | |
6584 | asection *tmp_sec; | |
6585 | enum c64_section_perm_type type | |
6586 | = c64_symbol_section_adjustment (h, value, sym_sec, &tmp_sec, info); | |
6587 | ||
6588 | if (type == C64_SYM_UNKNOWN) | |
6589 | return FALSE; | |
6590 | ||
6591 | if (tmp_sec->flags & SEC_CODE) | |
6592 | { | |
6593 | *adjust_addr = pcc_low; | |
6594 | return TRUE; | |
6595 | } | |
6596 | ||
6597 | return FALSE; | |
6598 | } | |
6599 | ||
6600 | /* Perform a relocation as part of a final link. The input relocation type | |
6601 | should be TLS relaxed. */ | |
6602 | ||
6603 | static bfd_reloc_status_type | |
6604 | elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, | |
6605 | bfd *input_bfd, | |
6606 | bfd *output_bfd, | |
6607 | asection *input_section, | |
6608 | bfd_byte *contents, | |
6609 | Elf_Internal_Rela *rel, | |
6610 | bfd_vma value, | |
6611 | struct bfd_link_info *info, | |
6612 | asection *sym_sec, | |
6613 | struct elf_link_hash_entry *h, | |
6614 | bfd_boolean *unresolved_reloc_p, | |
6615 | bfd_boolean save_addend, | |
6616 | bfd_vma *saved_addend, | |
6617 | Elf_Internal_Sym *sym) | |
6618 | { | |
6619 | Elf_Internal_Shdr *symtab_hdr; | |
6620 | unsigned int r_type = howto->type; | |
6621 | bfd_reloc_code_real_type bfd_r_type | |
6622 | = elfNN_aarch64_bfd_reloc_from_howto (howto); | |
6623 | unsigned long r_symndx; | |
6624 | bfd_byte *hit_data = contents + rel->r_offset; | |
6625 | bfd_vma place, off, got_entry_addr = 0; | |
6626 | bfd_signed_vma signed_addend; | |
6627 | struct elf_aarch64_link_hash_table *globals; | |
6628 | bfd_boolean weak_undef_p; | |
6629 | bfd_boolean relative_reloc; | |
6630 | asection *base_got; | |
6631 | bfd_vma orig_value = value; | |
6632 | bfd_boolean resolved_to_zero; | |
6633 | bfd_boolean abs_symbol_p; | |
6634 | Elf_Internal_Sym *isym = NULL; | |
6635 | bfd_boolean c64_rtype = FALSE; | |
6636 | bfd_boolean to_c64 = FALSE; | |
6637 | ||
6638 | globals = elf_aarch64_hash_table (info); | |
6639 | ||
6640 | symtab_hdr = &elf_symtab_hdr (input_bfd); | |
6641 | ||
6642 | BFD_ASSERT (is_aarch64_elf (input_bfd)); | |
6643 | ||
6644 | r_symndx = ELFNN_R_SYM (rel->r_info); | |
6645 | ||
6646 | place = input_section->output_section->vma | |
6647 | + input_section->output_offset + rel->r_offset; | |
6648 | ||
6649 | /* Get addend, accumulating the addend for consecutive relocs | |
6650 | which refer to the same offset. */ | |
6651 | signed_addend = saved_addend ? *saved_addend : 0; | |
6652 | signed_addend += rel->r_addend; | |
6653 | ||
6654 | weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak | |
6655 | : bfd_is_und_section (sym_sec)); | |
6656 | abs_symbol_p = h != NULL && bfd_is_abs_symbol (&h->root); | |
6657 | ||
6658 | if (sym) | |
6659 | { | |
6660 | isym = bfd_sym_from_r_symndx (&globals->root.sym_cache, input_bfd, | |
6661 | r_symndx); | |
6662 | BFD_ASSERT (isym != NULL); | |
6663 | to_c64 = (isym->st_target_internal & ST_BRANCH_TO_C64) != 0; | |
6664 | } | |
6665 | else | |
6666 | to_c64 = (h->target_internal & ST_BRANCH_TO_C64) != 0; | |
6667 | ||
6668 | ||
6669 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
6670 | it here if it is defined in a non-shared object. */ | |
6671 | if (h != NULL | |
6672 | && h->type == STT_GNU_IFUNC | |
6673 | && h->def_regular) | |
6674 | { | |
6675 | asection *plt; | |
6676 | const char *name; | |
6677 | bfd_vma addend = 0; | |
6678 | ||
6679 | if ((input_section->flags & SEC_ALLOC) == 0) | |
6680 | { | |
6681 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat | |
6682 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
6683 | if (elf_section_type (input_section) == SHT_NOTE) | |
6684 | goto skip_ifunc; | |
6685 | ||
6686 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
6687 | sections because such sections are not SEC_ALLOC and | |
6688 | thus ld.so will not process them. */ | |
6689 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
6690 | return bfd_reloc_ok; | |
6691 | ||
6692 | if (h->root.root.string) | |
6693 | name = h->root.root.string; | |
6694 | else | |
6695 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, NULL); | |
6696 | _bfd_error_handler | |
6697 | /* xgettext:c-format */ | |
6698 | (_("%pB(%pA+%#" PRIx64 "): " | |
6699 | "unresolvable %s relocation against symbol `%s'"), | |
6700 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
6701 | howto->name, name); | |
6702 | bfd_set_error (bfd_error_bad_value); | |
6703 | return bfd_reloc_notsupported; | |
6704 | } | |
6705 | else if (h->plt.offset == (bfd_vma) -1) | |
6706 | goto bad_ifunc_reloc; | |
6707 | ||
6708 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6709 | plt = globals->root.splt ? globals->root.splt : globals->root.iplt; | |
6710 | value = (plt->output_section->vma + plt->output_offset + h->plt.offset); | |
6711 | ||
6712 | switch (bfd_r_type) | |
6713 | { | |
6714 | default: | |
6715 | bad_ifunc_reloc: | |
6716 | if (h->root.root.string) | |
6717 | name = h->root.root.string; | |
6718 | else | |
6719 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
6720 | NULL); | |
6721 | _bfd_error_handler | |
6722 | /* xgettext:c-format */ | |
6723 | (_("%pB: relocation %s against STT_GNU_IFUNC " | |
6724 | "symbol `%s' isn't handled by %s"), input_bfd, | |
6725 | howto->name, name, __FUNCTION__); | |
6726 | bfd_set_error (bfd_error_bad_value); | |
6727 | return bfd_reloc_notsupported; | |
6728 | ||
6729 | case BFD_RELOC_AARCH64_NN: | |
6730 | if (rel->r_addend != 0) | |
6731 | { | |
6732 | if (h->root.root.string) | |
6733 | name = h->root.root.string; | |
6734 | else | |
6735 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
6736 | sym, NULL); | |
6737 | _bfd_error_handler | |
6738 | /* xgettext:c-format */ | |
6739 | (_("%pB: relocation %s against STT_GNU_IFUNC " | |
6740 | "symbol `%s' has non-zero addend: %" PRId64), | |
6741 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
6742 | bfd_set_error (bfd_error_bad_value); | |
6743 | return bfd_reloc_notsupported; | |
6744 | } | |
6745 | ||
6746 | /* Generate dynamic relocation only when there is a | |
6747 | non-GOT reference in a shared object. */ | |
6748 | if (bfd_link_pic (info) && h->non_got_ref) | |
6749 | { | |
6750 | Elf_Internal_Rela outrel; | |
6751 | asection *sreloc; | |
6752 | ||
6753 | /* Need a dynamic relocation to get the real function | |
6754 | address. */ | |
6755 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
6756 | info, | |
6757 | input_section, | |
6758 | rel->r_offset); | |
6759 | if (outrel.r_offset == (bfd_vma) -1 | |
6760 | || outrel.r_offset == (bfd_vma) -2) | |
6761 | abort (); | |
6762 | ||
6763 | outrel.r_offset += (input_section->output_section->vma | |
6764 | + input_section->output_offset); | |
6765 | ||
6766 | if (h->dynindx == -1 | |
6767 | || h->forced_local | |
6768 | || bfd_link_executable (info)) | |
6769 | { | |
6770 | /* This symbol is resolved locally. */ | |
6771 | outrel.r_info = (elf_aarch64_hash_entry (h)->got_type | |
6772 | == GOT_CAP | |
6773 | ? ELFNN_R_INFO (0, MORELLO_R (IRELATIVE)) | |
6774 | : ELFNN_R_INFO (0, AARCH64_R (IRELATIVE))); | |
6775 | outrel.r_addend = (h->root.u.def.value | |
6776 | + h->root.u.def.section->output_section->vma | |
6777 | + h->root.u.def.section->output_offset); | |
6778 | } | |
6779 | else | |
6780 | { | |
6781 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
6782 | outrel.r_addend = 0; | |
6783 | } | |
6784 | ||
6785 | sreloc = globals->root.irelifunc; | |
6786 | elf_append_rela (output_bfd, sreloc, &outrel); | |
6787 | ||
6788 | /* If this reloc is against an external symbol, we | |
6789 | do not want to fiddle with the addend. Otherwise, | |
6790 | we need to include the symbol value so that it | |
6791 | becomes an addend for the dynamic reloc. For an | |
6792 | internal symbol, we have updated addend. */ | |
6793 | return bfd_reloc_ok; | |
6794 | } | |
6795 | /* FALLTHROUGH */ | |
6796 | case BFD_RELOC_MORELLO_CALL26: | |
6797 | case BFD_RELOC_MORELLO_JUMP26: | |
6798 | case BFD_RELOC_AARCH64_CALL26: | |
6799 | case BFD_RELOC_AARCH64_JUMP26: | |
6800 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
6801 | place, value, | |
6802 | signed_addend, | |
6803 | weak_undef_p); | |
6804 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, | |
6805 | howto, value); | |
6806 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
6807 | case BFD_RELOC_MORELLO_ADR_GOT_PAGE: | |
6808 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
6809 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: | |
6810 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
6811 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: | |
6812 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: | |
6813 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: | |
6814 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: | |
6815 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
6816 | case BFD_RELOC_MORELLO_LD128_GOT_LO12_NC: | |
6817 | base_got = globals->root.sgot; | |
6818 | off = h->got.offset; | |
6819 | ||
6820 | if (base_got == NULL) | |
6821 | abort (); | |
6822 | ||
6823 | if (off == (bfd_vma) -1) | |
6824 | { | |
6825 | bfd_vma plt_index; | |
6826 | ||
6827 | /* We can't use h->got.offset here to save state, or | |
6828 | even just remember the offset, as finish_dynamic_symbol | |
6829 | would use that as offset into .got. */ | |
6830 | ||
6831 | if (globals->root.splt != NULL) | |
6832 | { | |
6833 | plt_index = ((h->plt.offset - globals->plt_header_size) / | |
6834 | globals->plt_entry_size); | |
6835 | off = (plt_index + 3) * GOT_ENTRY_SIZE (globals); | |
6836 | base_got = globals->root.sgotplt; | |
6837 | } | |
6838 | else | |
6839 | { | |
6840 | plt_index = h->plt.offset / globals->plt_entry_size; | |
6841 | off = plt_index * GOT_ENTRY_SIZE (globals); | |
6842 | base_got = globals->root.igotplt; | |
6843 | } | |
6844 | ||
6845 | if (h->dynindx == -1 | |
6846 | || h->forced_local | |
6847 | || info->symbolic) | |
6848 | { | |
6849 | /* This references the local definition. We must | |
6850 | initialize this entry in the global offset table. | |
6851 | Since the offset must always be a multiple of 8, | |
6852 | we use the least significant bit to record | |
6853 | whether we have initialized it already. | |
6854 | ||
6855 | When doing a dynamic link, we create a .rela.got | |
6856 | relocation entry to initialize the value. This | |
6857 | is done in the finish_dynamic_symbol routine. */ | |
6858 | if ((off & 1) != 0) | |
6859 | off &= ~1; | |
6860 | else | |
6861 | { | |
6862 | bfd_put_NN (output_bfd, value, | |
6863 | base_got->contents + off); | |
6864 | /* Note that this is harmless as -1 | 1 still is -1. */ | |
6865 | h->got.offset |= 1; | |
6866 | } | |
6867 | } | |
6868 | value = (base_got->output_section->vma | |
6869 | + base_got->output_offset + off); | |
6870 | } | |
6871 | else | |
6872 | value = aarch64_calculate_got_entry_vma (h, globals, info, | |
6873 | value, output_bfd, | |
6874 | unresolved_reloc_p); | |
6875 | ||
6876 | if (aarch64_relocation_aginst_gp_p (bfd_r_type)) | |
6877 | addend = (globals->root.sgot->output_section->vma | |
6878 | + globals->root.sgot->output_offset); | |
6879 | ||
6880 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
6881 | place, value, | |
6882 | addend, weak_undef_p); | |
6883 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value); | |
6884 | case BFD_RELOC_AARCH64_ADD_LO12: | |
6885 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
6886 | case BFD_RELOC_MORELLO_ADR_HI20_PCREL: | |
6887 | break; | |
6888 | } | |
6889 | } | |
6890 | ||
6891 | skip_ifunc: | |
6892 | resolved_to_zero = (h != NULL | |
6893 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); | |
6894 | ||
6895 | switch (bfd_r_type) | |
6896 | { | |
6897 | case BFD_RELOC_AARCH64_NONE: | |
6898 | case BFD_RELOC_AARCH64_TLSDESC_ADD: | |
6899 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
6900 | case BFD_RELOC_AARCH64_TLSDESC_LDR: | |
6901 | case BFD_RELOC_MORELLO_TLSDESC_CALL: | |
6902 | *unresolved_reloc_p = FALSE; | |
6903 | return bfd_reloc_ok; | |
6904 | ||
6905 | case BFD_RELOC_AARCH64_NN: | |
6906 | ||
6907 | /* When generating a shared object or relocatable executable, these | |
6908 | relocations are copied into the output file to be resolved at | |
6909 | run time. */ | |
6910 | if (((bfd_link_pic (info) | |
6911 | || globals->root.is_relocatable_executable) | |
6912 | && (input_section->flags & SEC_ALLOC) | |
6913 | && (h == NULL | |
6914 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
6915 | && !resolved_to_zero) | |
6916 | || h->root.type != bfd_link_hash_undefweak)) | |
6917 | /* Or we are creating an executable, we may need to keep relocations | |
6918 | for symbols satisfied by a dynamic library if we manage to avoid | |
6919 | copy relocs for the symbol. */ | |
6920 | || (ELIMINATE_COPY_RELOCS | |
6921 | && !bfd_link_pic (info) | |
6922 | && h != NULL | |
6923 | && (input_section->flags & SEC_ALLOC) | |
6924 | && h->dynindx != -1 | |
6925 | && !h->non_got_ref | |
6926 | && ((h->def_dynamic | |
6927 | && !h->def_regular) | |
6928 | || h->root.type == bfd_link_hash_undefweak | |
6929 | || h->root.type == bfd_link_hash_undefined))) | |
6930 | { | |
6931 | Elf_Internal_Rela outrel; | |
6932 | bfd_byte *loc; | |
6933 | bfd_boolean skip, relocate; | |
6934 | asection *sreloc; | |
6935 | ||
6936 | *unresolved_reloc_p = FALSE; | |
6937 | ||
6938 | skip = FALSE; | |
6939 | relocate = FALSE; | |
6940 | ||
6941 | outrel.r_addend = signed_addend; | |
6942 | outrel.r_offset = | |
6943 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
6944 | rel->r_offset); | |
6945 | if (outrel.r_offset == (bfd_vma) - 1) | |
6946 | skip = TRUE; | |
6947 | else if (outrel.r_offset == (bfd_vma) - 2) | |
6948 | { | |
6949 | skip = TRUE; | |
6950 | relocate = TRUE; | |
6951 | } | |
6952 | else if (abs_symbol_p) | |
6953 | { | |
6954 | /* Local absolute symbol. */ | |
6955 | skip = (h->forced_local || (h->dynindx == -1)); | |
6956 | relocate = skip; | |
6957 | } | |
6958 | ||
6959 | outrel.r_offset += (input_section->output_section->vma | |
6960 | + input_section->output_offset); | |
6961 | ||
6962 | if (skip) | |
6963 | memset (&outrel, 0, sizeof outrel); | |
6964 | else if (h != NULL | |
6965 | && h->dynindx != -1 | |
6966 | && (!bfd_link_pic (info) | |
6967 | || !(bfd_link_pie (info) || SYMBOLIC_BIND (info, h)) | |
6968 | || !h->def_regular)) | |
6969 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
6970 | else | |
6971 | { | |
6972 | int symbol; | |
6973 | ||
6974 | /* On SVR4-ish systems, the dynamic loader cannot | |
6975 | relocate the text and data segments independently, | |
6976 | so the symbol does not matter. */ | |
6977 | symbol = 0; | |
6978 | relocate = globals->no_apply_dynamic_relocs ? FALSE : TRUE; | |
6979 | outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE)); | |
6980 | outrel.r_addend += value; | |
6981 | } | |
6982 | ||
6983 | sreloc = elf_section_data (input_section)->sreloc; | |
6984 | if (sreloc == NULL || sreloc->contents == NULL) | |
6985 | return bfd_reloc_notsupported; | |
6986 | ||
6987 | loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals); | |
6988 | bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); | |
6989 | ||
6990 | if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size) | |
6991 | { | |
6992 | /* Sanity to check that we have previously allocated | |
6993 | sufficient space in the relocation section for the | |
6994 | number of relocations we actually want to emit. */ | |
6995 | abort (); | |
6996 | } | |
6997 | ||
6998 | /* If this reloc is against an external symbol, we do not want to | |
6999 | fiddle with the addend. Otherwise, we need to include the symbol | |
7000 | value so that it becomes an addend for the dynamic reloc. */ | |
7001 | if (!relocate) | |
7002 | return bfd_reloc_ok; | |
7003 | ||
7004 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
7005 | contents, rel->r_offset, value, | |
7006 | signed_addend); | |
7007 | } | |
7008 | else | |
7009 | value += signed_addend; | |
7010 | break; | |
7011 | ||
7012 | case BFD_RELOC_MORELLO_CALL26: | |
7013 | case BFD_RELOC_MORELLO_JUMP26: | |
7014 | case BFD_RELOC_AARCH64_CALL26: | |
7015 | case BFD_RELOC_AARCH64_JUMP26: | |
7016 | { | |
7017 | asection *splt = globals->root.splt; | |
7018 | bfd_boolean via_plt_p = | |
7019 | splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; | |
7020 | ||
7021 | /* A call to an undefined weak symbol is converted to a jump to | |
7022 | the next instruction unless a PLT entry will be created. | |
7023 | The jump to the next instruction is optimized as a NOP. | |
7024 | Do the same for local undefined symbols. */ | |
7025 | if (weak_undef_p && ! via_plt_p) | |
7026 | { | |
7027 | bfd_putl32 (INSN_NOP, hit_data); | |
7028 | return bfd_reloc_ok; | |
7029 | } | |
7030 | ||
7031 | /* If the call goes through a PLT entry, make sure to | |
7032 | check distance to the right destination address. */ | |
7033 | if (via_plt_p) | |
7034 | value = (splt->output_section->vma | |
7035 | + splt->output_offset + h->plt.offset); | |
7036 | ||
7037 | /* Check if a stub has to be inserted because the destination | |
7038 | is too far away. */ | |
7039 | struct elf_aarch64_stub_hash_entry *stub_entry = NULL; | |
7040 | ||
7041 | enum elf_aarch64_stub_type c64_stub = aarch64_stub_none; | |
7042 | ||
7043 | /* Figure out if we need an interworking stub and if yes, what | |
7044 | kind. */ | |
7045 | if (!via_plt_p) | |
7046 | c64_stub = aarch64_interwork_stub (r_type, to_c64); | |
7047 | ||
7048 | /* If the branch destination is directed to plt stub, "value" will be | |
7049 | the final destination, otherwise we should plus signed_addend, it may | |
7050 | contain non-zero value, for example call to local function symbol | |
7051 | which are turned into "sec_sym + sec_off", and sec_off is kept in | |
7052 | signed_addend. */ | |
7053 | if (c64_stub != aarch64_stub_none | |
7054 | || (aarch64_branch_reloc_p (r_type) | |
7055 | && !aarch64_valid_branch_p ((via_plt_p ? value | |
7056 | : value + signed_addend), place))) | |
7057 | { | |
7058 | /* The target is out of reach, so redirect the branch to | |
7059 | the local stub for this function. */ | |
7060 | stub_entry = elfNN_aarch64_get_stub_entry (input_section, sym_sec, | |
7061 | h, rel, globals, | |
7062 | c64_stub); | |
7063 | } | |
7064 | ||
7065 | if (stub_entry != NULL) | |
7066 | { | |
7067 | value = (stub_entry->stub_offset | |
7068 | + stub_entry->stub_sec->output_offset | |
7069 | + stub_entry->stub_sec->output_section->vma); | |
7070 | ||
7071 | /* We have redirected the destination to stub entry address, | |
7072 | so ignore any addend record in the original rela entry. */ | |
7073 | signed_addend = 0; | |
7074 | } | |
7075 | } | |
7076 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7077 | place, value, | |
7078 | signed_addend, weak_undef_p); | |
7079 | *unresolved_reloc_p = FALSE; | |
7080 | break; | |
7081 | ||
7082 | case BFD_RELOC_AARCH64_16_PCREL: | |
7083 | case BFD_RELOC_AARCH64_32_PCREL: | |
7084 | case BFD_RELOC_AARCH64_64_PCREL: | |
7085 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
7086 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
7087 | case BFD_RELOC_MORELLO_ADR_HI20_NC_PCREL: | |
7088 | case BFD_RELOC_MORELLO_ADR_HI20_PCREL: | |
7089 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
7090 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: | |
7091 | case BFD_RELOC_MORELLO_LD_LO17_PCREL: | |
7092 | case BFD_RELOC_AARCH64_MOVW_PREL_G0: | |
7093 | case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC: | |
7094 | case BFD_RELOC_AARCH64_MOVW_PREL_G1: | |
7095 | case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC: | |
7096 | case BFD_RELOC_AARCH64_MOVW_PREL_G2: | |
7097 | case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC: | |
7098 | case BFD_RELOC_AARCH64_MOVW_PREL_G3: | |
7099 | if (bfd_link_pic (info) | |
7100 | && (input_section->flags & SEC_ALLOC) != 0 | |
7101 | && (input_section->flags & SEC_READONLY) != 0 | |
7102 | && !SYMBOL_REFERENCES_LOCAL (info, h)) | |
7103 | { | |
7104 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
7105 | ||
7106 | _bfd_error_handler | |
7107 | /* xgettext:c-format */ | |
7108 | (_("%pB: relocation %s against symbol `%s' which may bind " | |
7109 | "externally can not be used when making a shared object; " | |
7110 | "recompile with -fPIC"), | |
7111 | input_bfd, elfNN_aarch64_howto_table[howto_index].name, | |
7112 | h->root.root.string); | |
7113 | bfd_set_error (bfd_error_bad_value); | |
7114 | return bfd_reloc_notsupported; | |
7115 | } | |
7116 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7117 | place, value, | |
7118 | signed_addend, | |
7119 | weak_undef_p); | |
7120 | ||
7121 | if (bfd_r_type == BFD_RELOC_AARCH64_ADR_LO21_PCREL && isym != NULL | |
7122 | && isym->st_target_internal & ST_BRANCH_TO_C64) | |
7123 | value |= 1; | |
7124 | break; | |
7125 | ||
7126 | case BFD_RELOC_MORELLO_BRANCH19: | |
7127 | case BFD_RELOC_MORELLO_TSTBR14: | |
7128 | c64_rtype = TRUE; | |
7129 | /* Fall through. */ | |
7130 | case BFD_RELOC_AARCH64_BRANCH19: | |
7131 | case BFD_RELOC_AARCH64_TSTBR14: | |
7132 | if (h && h->root.type == bfd_link_hash_undefined) | |
7133 | { | |
7134 | _bfd_error_handler | |
7135 | /* xgettext:c-format */ | |
7136 | (_("%pB: conditional branch to undefined symbol `%s' " | |
7137 | "not allowed"), input_bfd, h->root.root.string); | |
7138 | bfd_set_error (bfd_error_bad_value); | |
7139 | return bfd_reloc_notsupported; | |
7140 | } | |
7141 | { | |
7142 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
7143 | ||
7144 | if ((c64_rtype && !to_c64) || (!c64_rtype && to_c64)) | |
7145 | { | |
7146 | _bfd_error_handler | |
7147 | /* xgettext:c-format */ | |
7148 | (_("%pB: interworking not supported on relocation %s"), | |
7149 | input_bfd, elfNN_aarch64_howto_table[howto_index].name); | |
7150 | return bfd_reloc_notsupported; | |
7151 | } | |
7152 | } | |
7153 | /* Fall through. */ | |
7154 | ||
7155 | case BFD_RELOC_AARCH64_16: | |
7156 | #if ARCH_SIZE == 64 | |
7157 | case BFD_RELOC_AARCH64_32: | |
7158 | #endif | |
7159 | case BFD_RELOC_AARCH64_ADD_LO12: | |
7160 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
7161 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
7162 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
7163 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
7164 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
7165 | case BFD_RELOC_AARCH64_MOVW_G0: | |
7166 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
7167 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
7168 | case BFD_RELOC_AARCH64_MOVW_G1: | |
7169 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
7170 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
7171 | case BFD_RELOC_AARCH64_MOVW_G2: | |
7172 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
7173 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
7174 | case BFD_RELOC_AARCH64_MOVW_G3: | |
7175 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7176 | place, value, | |
7177 | signed_addend, weak_undef_p); | |
7178 | if (bfd_r_type == BFD_RELOC_AARCH64_ADD_LO12 && isym != NULL | |
7179 | && isym->st_target_internal & ST_BRANCH_TO_C64) | |
7180 | value |= 1; | |
7181 | ||
7182 | break; | |
7183 | ||
7184 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
7185 | case BFD_RELOC_MORELLO_ADR_GOT_PAGE: | |
7186 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
7187 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: | |
7188 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
7189 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: | |
7190 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
7191 | case BFD_RELOC_MORELLO_LD128_GOT_LO12_NC: | |
7192 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: | |
7193 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: | |
7194 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: | |
7195 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
7196 | base_got = globals->root.sgot; | |
7197 | ||
7198 | bfd_boolean c64_reloc = | |
7199 | (bfd_r_type == BFD_RELOC_MORELLO_LD128_GOT_LO12_NC | |
7200 | || bfd_r_type == BFD_RELOC_MORELLO_ADR_GOT_PAGE); | |
7201 | ||
7202 | if (signed_addend != 0) | |
7203 | { | |
7204 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
7205 | _bfd_error_handler | |
7206 | /* xgettext:c-format */ | |
7207 | (_("%pB: symbol plus addend can not be placed into the GOT " | |
7208 | "for relocation %s"), | |
7209 | input_bfd, elfNN_aarch64_howto_table[howto_index].name); | |
7210 | abort (); | |
7211 | } | |
7212 | ||
7213 | if (base_got == NULL) | |
7214 | BFD_ASSERT (h != NULL); | |
7215 | ||
7216 | relative_reloc = FALSE; | |
7217 | if (h != NULL) | |
7218 | { | |
7219 | bfd_vma addend = 0; | |
7220 | bfd_vma frag_value; | |
7221 | ||
7222 | /* If a symbol is not dynamic and is not undefined weak, bind it | |
7223 | locally and generate a RELATIVE relocation under PIC mode. | |
7224 | ||
7225 | NOTE: one symbol may be referenced by several relocations, we | |
7226 | should only generate one RELATIVE relocation for that symbol. | |
7227 | Therefore, check GOT offset mark first. | |
7228 | ||
7229 | NOTE2: Symbol references via GOT in C64 static binaries without | |
7230 | PIC should always have relative relocations, so we do that here | |
7231 | early. */ | |
7232 | if (((h->dynindx == -1 | |
7233 | && !h->forced_local | |
7234 | && h->root.type != bfd_link_hash_undefweak | |
7235 | && bfd_link_pic (info)) | |
7236 | || (!bfd_link_pic (info) && bfd_link_executable (info) | |
7237 | && c64_reloc)) | |
7238 | && !symbol_got_offset_mark_p (input_bfd, h, r_symndx)) | |
7239 | relative_reloc = TRUE; | |
7240 | ||
7241 | if (c64_reloc | |
7242 | && c64_symbol_adjust (h, value, sym_sec, info, &frag_value)) | |
7243 | signed_addend = (value | h->target_internal) - frag_value; | |
7244 | else | |
7245 | frag_value = value | h->target_internal; | |
7246 | ||
7247 | value = aarch64_calculate_got_entry_vma (h, globals, info, | |
7248 | frag_value, | |
7249 | output_bfd, | |
7250 | unresolved_reloc_p); | |
7251 | /* Record the GOT entry address which will be used when generating | |
7252 | RELATIVE relocation. */ | |
7253 | if (relative_reloc) | |
7254 | got_entry_addr = value; | |
7255 | ||
7256 | if (aarch64_relocation_aginst_gp_p (bfd_r_type)) | |
7257 | addend = (globals->root.sgot->output_section->vma | |
7258 | + globals->root.sgot->output_offset); | |
7259 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7260 | place, value, | |
7261 | addend, weak_undef_p); | |
7262 | } | |
7263 | else | |
7264 | { | |
7265 | bfd_vma addend = 0; | |
7266 | struct elf_aarch64_local_symbol *locals | |
7267 | = elf_aarch64_locals (input_bfd); | |
7268 | ||
7269 | if (locals == NULL) | |
7270 | { | |
7271 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
7272 | _bfd_error_handler | |
7273 | /* xgettext:c-format */ | |
7274 | (_("%pB: local symbol descriptor table be NULL when applying " | |
7275 | "relocation %s against local symbol"), | |
7276 | input_bfd, elfNN_aarch64_howto_table[howto_index].name); | |
7277 | abort (); | |
7278 | } | |
7279 | ||
7280 | got_entry_addr = (base_got->output_section->vma | |
7281 | + base_got->output_offset + off); | |
7282 | ||
7283 | if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx)) | |
7284 | { | |
7285 | bfd_vma frag_value; | |
7286 | ||
7287 | if (c64_reloc | |
7288 | && c64_symbol_adjust (h, value, sym_sec, info, &frag_value)) | |
7289 | signed_addend = (value | sym->st_target_internal) - frag_value; | |
7290 | else | |
7291 | frag_value = value | sym->st_target_internal; | |
7292 | ||
7293 | bfd_put_64 (output_bfd, frag_value, base_got->contents + off); | |
7294 | ||
7295 | /* For local symbol, we have done absolute relocation in static | |
7296 | linking stage. While for shared library, we need to update the | |
7297 | content of GOT entry according to the shared object's runtime | |
7298 | base address. So, we need to generate a R_AARCH64_RELATIVE reloc | |
7299 | for dynamic linker. */ | |
7300 | if (bfd_link_pic (info) | |
7301 | || (!bfd_link_pic (info) && bfd_link_executable (info) | |
7302 | && c64_reloc)) | |
7303 | relative_reloc = TRUE; | |
7304 | ||
7305 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
7306 | } | |
7307 | ||
7308 | /* Update the relocation value to GOT entry addr as we have transformed | |
7309 | the direct data access into indirect data access through GOT. */ | |
7310 | value = got_entry_addr; | |
7311 | ||
7312 | if (aarch64_relocation_aginst_gp_p (bfd_r_type)) | |
7313 | addend = base_got->output_section->vma + base_got->output_offset; | |
7314 | ||
7315 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7316 | place, value, | |
7317 | addend, weak_undef_p); | |
7318 | } | |
7319 | ||
7320 | if (relative_reloc) | |
7321 | { | |
7322 | asection *s; | |
7323 | Elf_Internal_Rela outrel; | |
7324 | ||
7325 | enum elf_aarch64_reloc_type rtype = AARCH64_R (RELATIVE); | |
7326 | ||
7327 | s = globals->root.srelgot; | |
7328 | ||
7329 | /* For a C64 relative relocation, also add size and permissions into | |
7330 | the frag. */ | |
7331 | if (c64_reloc) | |
7332 | { | |
7333 | bfd_reloc_status_type ret; | |
7334 | ||
7335 | ret = c64_fixup_frag (input_bfd, info, bfd_r_type, sym, h, | |
7336 | sym_sec, s, base_got->contents + off + 8, | |
7337 | orig_value, 0, off); | |
7338 | ||
7339 | if (ret != bfd_reloc_continue) | |
7340 | return ret; | |
7341 | ||
7342 | rtype = MORELLO_R (RELATIVE); | |
7343 | ||
7344 | if (bfd_link_executable (info) && !bfd_link_pic (info)) | |
7345 | s = globals->srelcaps; | |
7346 | ||
7347 | outrel.r_addend = signed_addend; | |
7348 | } | |
7349 | else | |
7350 | outrel.r_addend = orig_value; | |
7351 | ||
7352 | if (s == NULL) | |
7353 | abort (); | |
7354 | ||
7355 | outrel.r_offset = got_entry_addr; | |
7356 | outrel.r_info = ELFNN_R_INFO (0, rtype); | |
7357 | elf_append_rela (output_bfd, s, &outrel); | |
7358 | } | |
7359 | break; | |
7360 | ||
7361 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
7362 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
7363 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: | |
7364 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
7365 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: | |
7366 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
7367 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
7368 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: | |
7369 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: | |
7370 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: | |
7371 | if (globals->root.sgot == NULL) | |
7372 | return bfd_reloc_notsupported; | |
7373 | ||
7374 | value = (symbol_got_offset (input_bfd, h, r_symndx) | |
7375 | + globals->root.sgot->output_section->vma | |
7376 | + globals->root.sgot->output_offset); | |
7377 | ||
7378 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7379 | place, value, | |
7380 | 0, weak_undef_p); | |
7381 | *unresolved_reloc_p = FALSE; | |
7382 | break; | |
7383 | ||
7384 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: | |
7385 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: | |
7386 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
7387 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: | |
7388 | if (globals->root.sgot == NULL) | |
7389 | return bfd_reloc_notsupported; | |
7390 | ||
7391 | value = symbol_got_offset (input_bfd, h, r_symndx); | |
7392 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7393 | place, value, | |
7394 | 0, weak_undef_p); | |
7395 | *unresolved_reloc_p = FALSE; | |
7396 | break; | |
7397 | ||
7398 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12: | |
7399 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12: | |
7400 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: | |
7401 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12: | |
7402 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC: | |
7403 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12: | |
7404 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC: | |
7405 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12: | |
7406 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC: | |
7407 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12: | |
7408 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC: | |
7409 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0: | |
7410 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: | |
7411 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
7412 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC: | |
7413 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2: | |
7414 | { | |
7415 | if (!(weak_undef_p || elf_hash_table (info)->tls_sec)) | |
7416 | { | |
7417 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
7418 | _bfd_error_handler | |
7419 | /* xgettext:c-format */ | |
7420 | (_("%pB: TLS relocation %s against undefined symbol `%s'"), | |
7421 | input_bfd, elfNN_aarch64_howto_table[howto_index].name, | |
7422 | h->root.root.string); | |
7423 | bfd_set_error (bfd_error_bad_value); | |
7424 | return bfd_reloc_notsupported; | |
7425 | } | |
7426 | ||
7427 | bfd_vma def_value | |
7428 | = weak_undef_p ? 0 : signed_addend - dtpoff_base (info); | |
7429 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7430 | place, value, | |
7431 | def_value, weak_undef_p); | |
7432 | break; | |
7433 | } | |
7434 | ||
7435 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: | |
7436 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: | |
7437 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
7438 | case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12: | |
7439 | case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: | |
7440 | case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12: | |
7441 | case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: | |
7442 | case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12: | |
7443 | case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: | |
7444 | case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12: | |
7445 | case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: | |
7446 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
7447 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
7448 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
7449 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
7450 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
7451 | { | |
7452 | if (!(weak_undef_p || elf_hash_table (info)->tls_sec)) | |
7453 | { | |
7454 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
7455 | _bfd_error_handler | |
7456 | /* xgettext:c-format */ | |
7457 | (_("%pB: TLS relocation %s against undefined symbol `%s'"), | |
7458 | input_bfd, elfNN_aarch64_howto_table[howto_index].name, | |
7459 | h->root.root.string); | |
7460 | bfd_set_error (bfd_error_bad_value); | |
7461 | return bfd_reloc_notsupported; | |
7462 | } | |
7463 | ||
7464 | bfd_vma def_value | |
7465 | = weak_undef_p ? 0 : signed_addend - tpoff_base (info); | |
7466 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7467 | place, value, | |
7468 | def_value, weak_undef_p); | |
7469 | *unresolved_reloc_p = FALSE; | |
7470 | break; | |
7471 | } | |
7472 | ||
7473 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: | |
7474 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
7475 | case BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20: | |
7476 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: | |
7477 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
7478 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: | |
7479 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: | |
7480 | case BFD_RELOC_MORELLO_TLSDESC_LD128_LO12: | |
7481 | if (globals->root.sgot == NULL) | |
7482 | return bfd_reloc_notsupported; | |
7483 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) | |
7484 | + globals->root.sgotplt->output_section->vma | |
7485 | + globals->root.sgotplt->output_offset | |
7486 | + globals->sgotplt_jump_table_size); | |
7487 | ||
7488 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7489 | place, value, | |
7490 | 0, weak_undef_p); | |
7491 | *unresolved_reloc_p = FALSE; | |
7492 | break; | |
7493 | ||
7494 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: | |
7495 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: | |
7496 | if (globals->root.sgot == NULL) | |
7497 | return bfd_reloc_notsupported; | |
7498 | ||
7499 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) | |
7500 | + globals->root.sgotplt->output_section->vma | |
7501 | + globals->root.sgotplt->output_offset | |
7502 | + globals->sgotplt_jump_table_size); | |
7503 | ||
7504 | value -= (globals->root.sgot->output_section->vma | |
7505 | + globals->root.sgot->output_offset); | |
7506 | ||
7507 | value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type, | |
7508 | place, value, | |
7509 | 0, weak_undef_p); | |
7510 | *unresolved_reloc_p = FALSE; | |
7511 | break; | |
7512 | ||
7513 | case BFD_RELOC_MORELLO_CAPINIT: | |
7514 | { | |
7515 | Elf_Internal_Rela outrel; | |
7516 | ||
7517 | if (input_section->flags & SEC_READONLY) | |
7518 | { | |
7519 | _bfd_error_handler | |
7520 | /* xgettext:c-format */ | |
7521 | (_("%pB: capability relocation section must be writable"), | |
7522 | input_bfd); | |
7523 | bfd_set_error (bfd_error_bad_value); | |
7524 | return bfd_reloc_notsupported; | |
7525 | } | |
7526 | ||
7527 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, | |
7528 | input_section, | |
7529 | rel->r_offset); | |
7530 | ||
7531 | outrel.r_offset += (input_section->output_section->vma | |
7532 | + input_section->output_offset); | |
7533 | ||
7534 | /* Capability-aligned. */ | |
7535 | if (outrel.r_offset & 0xf) | |
7536 | return bfd_reloc_overflow; | |
7537 | ||
7538 | bfd_reloc_status_type ret; | |
7539 | ||
7540 | ret = c64_fixup_frag (input_bfd, info, bfd_r_type, sym, h, sym_sec, | |
7541 | input_section, hit_data + 8, value, | |
7542 | signed_addend, rel->r_offset); | |
7543 | ||
7544 | if (ret != bfd_reloc_continue) | |
7545 | return ret; | |
7546 | ||
7547 | outrel.r_addend = signed_addend; | |
7548 | value |= (h != NULL ? h->target_internal : sym->st_target_internal); | |
7549 | ||
7550 | /* Emit a dynamic relocation if we are building PIC. */ | |
7551 | if (h != NULL | |
7552 | && h->dynindx != -1 | |
7553 | && bfd_link_pic (info) | |
7554 | && !SYMBOL_REFERENCES_LOCAL (info, h)) | |
7555 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
7556 | else | |
7557 | outrel.r_info = ELFNN_R_INFO (0, MORELLO_R (RELATIVE)); | |
7558 | ||
7559 | /* Symbols without size information get bounds to the | |
7560 | whole section: adjust the base of the capability to the | |
7561 | start of the section and set the addend to obtain the | |
7562 | correct address for the symbol. */ | |
7563 | bfd_vma new_value; | |
7564 | if (c64_symbol_adjust (h, value, sym_sec, info, &new_value)) | |
7565 | { | |
7566 | outrel.r_addend += (value - new_value); | |
7567 | value = new_value; | |
7568 | } | |
7569 | ||
7570 | asection *s = globals->srelcaps; | |
7571 | ||
7572 | elf_append_rela (output_bfd, s, &outrel); | |
7573 | *unresolved_reloc_p = FALSE; | |
7574 | } | |
7575 | break; | |
7576 | ||
7577 | default: | |
7578 | return bfd_reloc_notsupported; | |
7579 | } | |
7580 | ||
7581 | if (saved_addend) | |
7582 | *saved_addend = value; | |
7583 | ||
7584 | /* Only apply the final relocation in a sequence. */ | |
7585 | if (save_addend) | |
7586 | return bfd_reloc_continue; | |
7587 | ||
7588 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, | |
7589 | howto, value); | |
7590 | } | |
7591 | ||
7592 | /* LP64 and ILP32 operates on x- and w-registers respectively. | |
7593 | Next definitions take into account the difference between | |
7594 | corresponding machine codes. R means x-register if the target | |
7595 | arch is LP64, and w-register if the target is ILP32. */ | |
7596 | ||
7597 | #if ARCH_SIZE == 64 | |
7598 | # define add_R0_R0 (0x91000000) | |
7599 | # define add_R0_R0_R1 (0x8b000020) | |
7600 | # define add_R0_R1 (0x91400020) | |
7601 | # define ldr_R0 (0x58000000) | |
7602 | # define ldr_R0_mask(i) (i & 0xffffffe0) | |
7603 | # define ldr_R0_x0 (0xf9400000) | |
7604 | # define ldr_hw_R0 (0xf2a00000) | |
7605 | # define movk_R0 (0xf2800000) | |
7606 | # define movz_R0 (0xd2a00000) | |
7607 | # define movz_hw_R0 (0xd2c00000) | |
7608 | #else /*ARCH_SIZE == 32 */ | |
7609 | # define add_R0_R0 (0x11000000) | |
7610 | # define add_R0_R0_R1 (0x0b000020) | |
7611 | # define add_R0_R1 (0x11400020) | |
7612 | # define ldr_R0 (0x18000000) | |
7613 | # define ldr_R0_mask(i) (i & 0xbfffffe0) | |
7614 | # define ldr_R0_x0 (0xb9400000) | |
7615 | # define ldr_hw_R0 (0x72a00000) | |
7616 | # define movk_R0 (0x72800000) | |
7617 | # define movz_R0 (0x52a00000) | |
7618 | # define movz_hw_R0 (0x52c00000) | |
7619 | #endif | |
7620 | ||
7621 | /* Structure to hold payload for _bfd_aarch64_erratum_843419_clear_stub, | |
7622 | it is used to identify the stub information to reset. */ | |
7623 | ||
7624 | struct erratum_843419_branch_to_stub_clear_data | |
7625 | { | |
7626 | bfd_vma adrp_offset; | |
7627 | asection *output_section; | |
7628 | }; | |
7629 | ||
7630 | /* Clear the erratum information for GEN_ENTRY if the ADRP_OFFSET and | |
7631 | section inside IN_ARG matches. The clearing is done by setting the | |
7632 | stub_type to none. */ | |
7633 | ||
7634 | static bfd_boolean | |
7635 | _bfd_aarch64_erratum_843419_clear_stub (struct bfd_hash_entry *gen_entry, | |
7636 | void *in_arg) | |
7637 | { | |
7638 | struct elf_aarch64_stub_hash_entry *stub_entry | |
7639 | = (struct elf_aarch64_stub_hash_entry *) gen_entry; | |
7640 | struct erratum_843419_branch_to_stub_clear_data *data | |
7641 | = (struct erratum_843419_branch_to_stub_clear_data *) in_arg; | |
7642 | ||
7643 | if (stub_entry->target_section != data->output_section | |
7644 | || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer | |
7645 | || stub_entry->adrp_offset != data->adrp_offset) | |
7646 | return TRUE; | |
7647 | ||
7648 | /* Change the stub type instead of removing the entry, removing from the hash | |
7649 | table would be slower and we have already reserved the memory for the entry | |
7650 | so there wouldn't be much gain. Changing the stub also keeps around a | |
7651 | record of what was there before. */ | |
7652 | stub_entry->stub_type = aarch64_stub_none; | |
7653 | ||
7654 | /* We're done and there could have been only one matching stub at that | |
7655 | particular offset, so abort further traversal. */ | |
7656 | return FALSE; | |
7657 | } | |
7658 | ||
7659 | /* TLS Relaxations may relax an adrp sequence that matches the erratum 843419 | |
7660 | sequence. In this case the erratum no longer applies and we need to remove | |
7661 | the entry from the pending stub generation. This clears matching adrp insn | |
7662 | at ADRP_OFFSET in INPUT_SECTION in the stub table defined in GLOBALS. */ | |
7663 | ||
7664 | static void | |
7665 | clear_erratum_843419_entry (struct elf_aarch64_link_hash_table *globals, | |
7666 | bfd_vma adrp_offset, asection *input_section) | |
7667 | { | |
7668 | if (globals->fix_erratum_843419 & ERRAT_ADRP) | |
7669 | { | |
7670 | struct erratum_843419_branch_to_stub_clear_data data; | |
7671 | data.adrp_offset = adrp_offset; | |
7672 | data.output_section = input_section; | |
7673 | ||
7674 | bfd_hash_traverse (&globals->stub_hash_table, | |
7675 | _bfd_aarch64_erratum_843419_clear_stub, &data); | |
7676 | } | |
7677 | } | |
7678 | ||
7679 | #define BUILD_MOVZ(_reg, _imm) (movz_R0 \ | |
7680 | | ((((_imm) >> 16) & 0xffff) << 5) \ | |
7681 | | (_reg)) | |
7682 | #define BUILD_MOVK(_reg, _imm) (movk_R0 | (((_imm) & 0xffff) << 5) | (_reg)) | |
7683 | ||
7684 | /* Handle TLS relaxations. Relaxing is possible for symbols that use | |
7685 | R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static | |
7686 | link. | |
7687 | ||
7688 | Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller | |
7689 | is to then call final_link_relocate. Return other values in the | |
7690 | case of error. */ | |
7691 | ||
7692 | static bfd_reloc_status_type | |
7693 | elfNN_aarch64_tls_relax (bfd *input_bfd, struct bfd_link_info *info, | |
7694 | asection *input_section, | |
7695 | bfd_byte *contents, Elf_Internal_Rela *rel, | |
7696 | struct elf_link_hash_entry *h, unsigned long r_symndx) | |
7697 | { | |
7698 | bfd_boolean is_local = h == NULL; | |
7699 | ||
7700 | unsigned int r_type = ELFNN_R_TYPE (rel->r_info); | |
7701 | unsigned long insn; | |
7702 | bfd_vma sym_size = 0; | |
7703 | struct elf_aarch64_link_hash_table *globals = elf_aarch64_hash_table (info); | |
7704 | ||
7705 | BFD_ASSERT (globals && input_bfd && contents && rel); | |
7706 | ||
7707 | if (is_local) | |
7708 | { | |
7709 | if (h != NULL) | |
7710 | sym_size = h->size; | |
7711 | else | |
7712 | { | |
7713 | Elf_Internal_Sym *sym; | |
7714 | ||
7715 | sym = bfd_sym_from_r_symndx (&globals->root.sym_cache, input_bfd, | |
7716 | r_symndx); | |
7717 | BFD_ASSERT (sym != NULL); | |
7718 | sym_size = sym->st_size; | |
7719 | } | |
7720 | } | |
7721 | ||
7722 | switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type)) | |
7723 | { | |
7724 | case BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20: | |
7725 | if (is_local || !bfd_link_pic (info)) | |
7726 | { | |
7727 | /* GD->LE relaxation: | |
7728 | nop => movz x1, objsize_hi16 | |
7729 | adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var */ | |
7730 | bfd_putl32 (BUILD_MOVZ(1, sym_size), contents + rel->r_offset - 4); | |
7731 | bfd_putl32 (movz_R0, contents + rel->r_offset); | |
7732 | ||
7733 | /* We have relaxed the adrp into a mov, we may have to clear any | |
7734 | pending erratum fixes. */ | |
7735 | clear_erratum_843419_entry (globals, rel->r_offset, input_section); | |
7736 | return bfd_reloc_continue; | |
7737 | } | |
7738 | else | |
7739 | { | |
7740 | /* GD->IE relaxation: Not implemented. */ | |
7741 | return bfd_reloc_continue; | |
7742 | } | |
7743 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
7744 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
7745 | if (is_local) | |
7746 | { | |
7747 | /* GD->LE relaxation: | |
7748 | adrp x0, :tlsgd:var => movz R0, :tprel_g1:var | |
7749 | or | |
7750 | adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var | |
7751 | ||
7752 | Where R is x for LP64, and w for ILP32. */ | |
7753 | bfd_putl32 (movz_R0, contents + rel->r_offset); | |
7754 | /* We have relaxed the adrp into a mov, we may have to clear any | |
7755 | pending erratum fixes. */ | |
7756 | clear_erratum_843419_entry (globals, rel->r_offset, input_section); | |
7757 | return bfd_reloc_continue; | |
7758 | } | |
7759 | else | |
7760 | { | |
7761 | /* GD->IE relaxation: | |
7762 | adrp x0, :tlsgd:var => adrp x0, :gottprel:var | |
7763 | or | |
7764 | adrp x0, :tlsdesc:var => adrp x0, :gottprel:var | |
7765 | */ | |
7766 | return bfd_reloc_continue; | |
7767 | } | |
7768 | ||
7769 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: | |
7770 | BFD_ASSERT (0); | |
7771 | break; | |
7772 | ||
7773 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: | |
7774 | if (is_local) | |
7775 | { | |
7776 | /* Tiny TLSDESC->LE relaxation: | |
7777 | ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var | |
7778 | adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var | |
7779 | .tlsdesccall var | |
7780 | blr x1 => nop | |
7781 | ||
7782 | Where R is x for LP64, and w for ILP32. */ | |
7783 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21)); | |
7784 | BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL)); | |
7785 | ||
7786 | rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), | |
7787 | AARCH64_R (TLSLE_MOVW_TPREL_G0_NC)); | |
7788 | rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7789 | ||
7790 | bfd_putl32 (movz_R0, contents + rel->r_offset); | |
7791 | bfd_putl32 (movk_R0, contents + rel->r_offset + 4); | |
7792 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8); | |
7793 | return bfd_reloc_continue; | |
7794 | } | |
7795 | else | |
7796 | { | |
7797 | /* Tiny TLSDESC->IE relaxation: | |
7798 | ldr x1, :tlsdesc:var => ldr x0, :gottprel:var | |
7799 | adr x0, :tlsdesc:var => nop | |
7800 | .tlsdesccall var | |
7801 | blr x1 => nop | |
7802 | */ | |
7803 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21)); | |
7804 | BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL)); | |
7805 | ||
7806 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7807 | rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7808 | ||
7809 | bfd_putl32 (ldr_R0, contents + rel->r_offset); | |
7810 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4); | |
7811 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8); | |
7812 | return bfd_reloc_continue; | |
7813 | } | |
7814 | ||
7815 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: | |
7816 | if (is_local) | |
7817 | { | |
7818 | /* Tiny GD->LE relaxation: | |
7819 | adr x0, :tlsgd:var => mrs x1, tpidr_el0 | |
7820 | bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12 | |
7821 | nop => add R0, R0, #:tprel_lo12_nc:x | |
7822 | ||
7823 | Where R is x for LP64, and x for Ilp32. */ | |
7824 | ||
7825 | /* First kill the tls_get_addr reloc on the bl instruction. */ | |
7826 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
7827 | ||
7828 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0); | |
7829 | bfd_putl32 (add_R0_R1, contents + rel->r_offset + 4); | |
7830 | bfd_putl32 (add_R0_R0, contents + rel->r_offset + 8); | |
7831 | ||
7832 | rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), | |
7833 | AARCH64_R (TLSLE_ADD_TPREL_LO12_NC)); | |
7834 | rel[1].r_offset = rel->r_offset + 8; | |
7835 | ||
7836 | /* Move the current relocation to the second instruction in | |
7837 | the sequence. */ | |
7838 | rel->r_offset += 4; | |
7839 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), | |
7840 | AARCH64_R (TLSLE_ADD_TPREL_HI12)); | |
7841 | return bfd_reloc_continue; | |
7842 | } | |
7843 | else | |
7844 | { | |
7845 | /* Tiny GD->IE relaxation: | |
7846 | adr x0, :tlsgd:var => ldr R0, :gottprel:var | |
7847 | bl __tls_get_addr => mrs x1, tpidr_el0 | |
7848 | nop => add R0, R0, R1 | |
7849 | ||
7850 | Where R is x for LP64, and w for Ilp32. */ | |
7851 | ||
7852 | /* First kill the tls_get_addr reloc on the bl instruction. */ | |
7853 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
7854 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7855 | ||
7856 | bfd_putl32 (ldr_R0, contents + rel->r_offset); | |
7857 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); | |
7858 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8); | |
7859 | return bfd_reloc_continue; | |
7860 | } | |
7861 | ||
7862 | #if ARCH_SIZE == 64 | |
7863 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: | |
7864 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSGD_MOVW_G0_NC)); | |
7865 | BFD_ASSERT (rel->r_offset + 12 == rel[2].r_offset); | |
7866 | BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (CALL26)); | |
7867 | ||
7868 | if (is_local) | |
7869 | { | |
7870 | /* Large GD->LE relaxation: | |
7871 | movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32 | |
7872 | movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16 | |
7873 | add x0, gp, x0 => movk x0, #:tprel_g0_nc:var | |
7874 | bl __tls_get_addr => mrs x1, tpidr_el0 | |
7875 | nop => add x0, x0, x1 | |
7876 | */ | |
7877 | rel[2].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), | |
7878 | AARCH64_R (TLSLE_MOVW_TPREL_G0_NC)); | |
7879 | rel[2].r_offset = rel->r_offset + 8; | |
7880 | ||
7881 | bfd_putl32 (movz_hw_R0, contents + rel->r_offset + 0); | |
7882 | bfd_putl32 (ldr_hw_R0, contents + rel->r_offset + 4); | |
7883 | bfd_putl32 (movk_R0, contents + rel->r_offset + 8); | |
7884 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12); | |
7885 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16); | |
7886 | } | |
7887 | else | |
7888 | { | |
7889 | /* Large GD->IE relaxation: | |
7890 | movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16 | |
7891 | movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var | |
7892 | add x0, gp, x0 => ldr x0, [gp, x0] | |
7893 | bl __tls_get_addr => mrs x1, tpidr_el0 | |
7894 | nop => add x0, x0, x1 | |
7895 | */ | |
7896 | rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7897 | bfd_putl32 (0xd2a80000, contents + rel->r_offset + 0); | |
7898 | bfd_putl32 (ldr_R0, contents + rel->r_offset + 8); | |
7899 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12); | |
7900 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16); | |
7901 | } | |
7902 | return bfd_reloc_continue; | |
7903 | ||
7904 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: | |
7905 | return bfd_reloc_continue; | |
7906 | #endif | |
7907 | ||
7908 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
7909 | return bfd_reloc_continue; | |
7910 | ||
7911 | case BFD_RELOC_MORELLO_TLSDESC_LD128_LO12: | |
7912 | if (is_local || !bfd_link_pic (info)) | |
7913 | { | |
7914 | /* GD->LE relaxation: | |
7915 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var */ | |
7916 | bfd_putl32 (movk_R0, contents + rel->r_offset); | |
7917 | return bfd_reloc_continue; | |
7918 | } | |
7919 | else | |
7920 | { | |
7921 | /* GD->IE relaxation: not implemented. */ | |
7922 | return bfd_reloc_continue; | |
7923 | } | |
7924 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: | |
7925 | if (is_local) | |
7926 | { | |
7927 | /* GD->LE relaxation: | |
7928 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var | |
7929 | ||
7930 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
7931 | bfd_putl32 (movk_R0, contents + rel->r_offset); | |
7932 | return bfd_reloc_continue; | |
7933 | } | |
7934 | else | |
7935 | { | |
7936 | /* GD->IE relaxation: | |
7937 | ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var] | |
7938 | ||
7939 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
7940 | insn = bfd_getl32 (contents + rel->r_offset); | |
7941 | bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset); | |
7942 | return bfd_reloc_continue; | |
7943 | } | |
7944 | ||
7945 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
7946 | if (is_local) | |
7947 | { | |
7948 | /* GD->LE relaxation | |
7949 | add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var | |
7950 | bl __tls_get_addr => mrs x1, tpidr_el0 | |
7951 | nop => add R0, R1, R0 | |
7952 | ||
7953 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
7954 | ||
7955 | /* First kill the tls_get_addr reloc on the bl instruction. */ | |
7956 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
7957 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7958 | ||
7959 | bfd_putl32 (movk_R0, contents + rel->r_offset); | |
7960 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); | |
7961 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8); | |
7962 | return bfd_reloc_continue; | |
7963 | } | |
7964 | else | |
7965 | { | |
7966 | /* GD->IE relaxation | |
7967 | ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var] | |
7968 | BL __tls_get_addr => mrs x1, tpidr_el0 | |
7969 | R_AARCH64_CALL26 | |
7970 | NOP => add R0, R1, R0 | |
7971 | ||
7972 | Where R is x for lp64 mode, and w for ilp32 mode. */ | |
7973 | ||
7974 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); | |
7975 | ||
7976 | /* Remove the relocation on the BL instruction. */ | |
7977 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
7978 | ||
7979 | /* We choose to fixup the BL and NOP instructions using the | |
7980 | offset from the second relocation to allow flexibility in | |
7981 | scheduling instructions between the ADD and BL. */ | |
7982 | bfd_putl32 (ldr_R0_x0, contents + rel->r_offset); | |
7983 | bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); | |
7984 | bfd_putl32 (add_R0_R0_R1, contents + rel[1].r_offset + 4); | |
7985 | return bfd_reloc_continue; | |
7986 | } | |
7987 | ||
7988 | case BFD_RELOC_MORELLO_TLSDESC_CALL: | |
7989 | /* GD->LE relaxation: | |
7990 | blr cd => add c0, c2, x0 */ | |
7991 | if (is_local || !bfd_link_pic (info)) | |
7992 | { | |
7993 | bfd_putl32 (0xc2a06040, contents + rel->r_offset); | |
7994 | return bfd_reloc_ok; | |
7995 | } | |
7996 | else | |
7997 | goto set_nop; | |
7998 | ||
7999 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: | |
8000 | /* GD->LE relaxation: | |
8001 | ldr cd, [c0, #:tlsdesc_lo12:var] => movk x1, objsize_lo16 */ | |
8002 | if ((is_local || !bfd_link_pic (info)) | |
8003 | && ELFNN_R_TYPE (rel[1].r_info) == MORELLO_R (TLSDESC_CALL)) | |
8004 | { | |
8005 | bfd_putl32 (BUILD_MOVK(1, sym_size), contents + rel->r_offset); | |
8006 | return bfd_reloc_continue; | |
8007 | } | |
8008 | ||
8009 | /* Fall through. */ | |
8010 | case BFD_RELOC_AARCH64_TLSDESC_ADD: | |
8011 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
8012 | /* GD->IE/LE relaxation: | |
8013 | add x0, x0, #:tlsdesc_lo12:var => nop | |
8014 | blr xd => nop | |
8015 | */ | |
8016 | set_nop: | |
8017 | bfd_putl32 (INSN_NOP, contents + rel->r_offset); | |
8018 | return bfd_reloc_ok; | |
8019 | ||
8020 | case BFD_RELOC_AARCH64_TLSDESC_LDR: | |
8021 | if (is_local) | |
8022 | { | |
8023 | /* GD->LE relaxation: | |
8024 | ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var | |
8025 | ||
8026 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8027 | bfd_putl32 (movk_R0, contents + rel->r_offset); | |
8028 | return bfd_reloc_continue; | |
8029 | } | |
8030 | else | |
8031 | { | |
8032 | /* GD->IE relaxation: | |
8033 | ldr xd, [gp, xn] => ldr R0, [gp, xn] | |
8034 | ||
8035 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8036 | insn = bfd_getl32 (contents + rel->r_offset); | |
8037 | bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset); | |
8038 | return bfd_reloc_ok; | |
8039 | } | |
8040 | ||
8041 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: | |
8042 | /* GD->LE relaxation: | |
8043 | movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16 | |
8044 | GD->IE relaxation: | |
8045 | movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var | |
8046 | ||
8047 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8048 | if (is_local) | |
8049 | bfd_putl32 (ldr_hw_R0, contents + rel->r_offset); | |
8050 | return bfd_reloc_continue; | |
8051 | ||
8052 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: | |
8053 | if (is_local) | |
8054 | { | |
8055 | /* GD->LE relaxation: | |
8056 | movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32 | |
8057 | ||
8058 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8059 | bfd_putl32 (movz_hw_R0, contents + rel->r_offset); | |
8060 | return bfd_reloc_continue; | |
8061 | } | |
8062 | else | |
8063 | { | |
8064 | /* GD->IE relaxation: | |
8065 | movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16 | |
8066 | ||
8067 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8068 | insn = bfd_getl32 (contents + rel->r_offset); | |
8069 | bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset); | |
8070 | return bfd_reloc_continue; | |
8071 | } | |
8072 | ||
8073 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
8074 | /* IE->LE relaxation: | |
8075 | adrp xd, :gottprel:var => movz Rd, :tprel_g1:var | |
8076 | ||
8077 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8078 | if (is_local) | |
8079 | { | |
8080 | insn = bfd_getl32 (contents + rel->r_offset); | |
8081 | bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset); | |
8082 | /* We have relaxed the adrp into a mov, we may have to clear any | |
8083 | pending erratum fixes. */ | |
8084 | clear_erratum_843419_entry (globals, rel->r_offset, input_section); | |
8085 | } | |
8086 | return bfd_reloc_continue; | |
8087 | ||
8088 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: | |
8089 | /* IE->LE relaxation: | |
8090 | ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var | |
8091 | ||
8092 | Where R is x for lp64 mode, and w for ILP32 mode. */ | |
8093 | if (is_local) | |
8094 | { | |
8095 | insn = bfd_getl32 (contents + rel->r_offset); | |
8096 | bfd_putl32 (movk_R0 | (insn & 0x1f), contents + rel->r_offset); | |
8097 | } | |
8098 | return bfd_reloc_continue; | |
8099 | ||
8100 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: | |
8101 | /* LD->LE relaxation (tiny): | |
8102 | adr x0, :tlsldm:x => mrs x0, tpidr_el0 | |
8103 | bl __tls_get_addr => add R0, R0, TCB_SIZE | |
8104 | ||
8105 | Where R is x for lp64 mode, and w for ilp32 mode. */ | |
8106 | if (is_local) | |
8107 | { | |
8108 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
8109 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); | |
8110 | /* No need of CALL26 relocation for tls_get_addr. */ | |
8111 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
8112 | bfd_putl32 (0xd53bd040, contents + rel->r_offset + 0); | |
8113 | bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10), | |
8114 | contents + rel->r_offset + 4); | |
8115 | return bfd_reloc_ok; | |
8116 | } | |
8117 | return bfd_reloc_continue; | |
8118 | ||
8119 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: | |
8120 | /* LD->LE relaxation (small): | |
8121 | adrp x0, :tlsldm:x => mrs x0, tpidr_el0 | |
8122 | */ | |
8123 | if (is_local) | |
8124 | { | |
8125 | bfd_putl32 (0xd53bd040, contents + rel->r_offset); | |
8126 | return bfd_reloc_ok; | |
8127 | } | |
8128 | return bfd_reloc_continue; | |
8129 | ||
8130 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: | |
8131 | /* LD->LE relaxation (small): | |
8132 | add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE | |
8133 | bl __tls_get_addr => nop | |
8134 | ||
8135 | Where R is x for lp64 mode, and w for ilp32 mode. */ | |
8136 | if (is_local) | |
8137 | { | |
8138 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
8139 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); | |
8140 | /* No need of CALL26 relocation for tls_get_addr. */ | |
8141 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
8142 | bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10), | |
8143 | contents + rel->r_offset + 0); | |
8144 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4); | |
8145 | return bfd_reloc_ok; | |
8146 | } | |
8147 | return bfd_reloc_continue; | |
8148 | ||
8149 | default: | |
8150 | return bfd_reloc_continue; | |
8151 | } | |
8152 | ||
8153 | return bfd_reloc_ok; | |
8154 | } | |
8155 | ||
8156 | /* Relocate an AArch64 ELF section. */ | |
8157 | ||
8158 | static bfd_boolean | |
8159 | elfNN_aarch64_relocate_section (bfd *output_bfd, | |
8160 | struct bfd_link_info *info, | |
8161 | bfd *input_bfd, | |
8162 | asection *input_section, | |
8163 | bfd_byte *contents, | |
8164 | Elf_Internal_Rela *relocs, | |
8165 | Elf_Internal_Sym *local_syms, | |
8166 | asection **local_sections) | |
8167 | { | |
8168 | Elf_Internal_Shdr *symtab_hdr; | |
8169 | struct elf_link_hash_entry **sym_hashes; | |
8170 | Elf_Internal_Rela *rel; | |
8171 | Elf_Internal_Rela *relend; | |
8172 | const char *name; | |
8173 | struct elf_aarch64_link_hash_table *globals; | |
8174 | bfd_boolean save_addend = FALSE; | |
8175 | bfd_vma addend = 0; | |
8176 | ||
8177 | globals = elf_aarch64_hash_table (info); | |
8178 | ||
8179 | symtab_hdr = &elf_symtab_hdr (input_bfd); | |
8180 | sym_hashes = elf_sym_hashes (input_bfd); | |
8181 | ||
8182 | rel = relocs; | |
8183 | relend = relocs + input_section->reloc_count; | |
8184 | for (; rel < relend; rel++) | |
8185 | { | |
8186 | unsigned int r_type; | |
8187 | bfd_reloc_code_real_type bfd_r_type; | |
8188 | bfd_reloc_code_real_type relaxed_bfd_r_type; | |
8189 | reloc_howto_type *howto; | |
8190 | unsigned long r_symndx; | |
8191 | Elf_Internal_Sym *sym; | |
8192 | asection *sec; | |
8193 | struct elf_link_hash_entry *h; | |
8194 | bfd_vma relocation; | |
8195 | bfd_reloc_status_type r; | |
8196 | arelent bfd_reloc; | |
8197 | char sym_type; | |
8198 | bfd_boolean unresolved_reloc = FALSE; | |
8199 | char *error_message = NULL; | |
8200 | ||
8201 | r_symndx = ELFNN_R_SYM (rel->r_info); | |
8202 | r_type = ELFNN_R_TYPE (rel->r_info); | |
8203 | ||
8204 | bfd_reloc.howto = elfNN_aarch64_howto_from_type (input_bfd, r_type); | |
8205 | howto = bfd_reloc.howto; | |
8206 | ||
8207 | if (howto == NULL) | |
8208 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); | |
8209 | ||
8210 | bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto); | |
8211 | ||
8212 | h = NULL; | |
8213 | sym = NULL; | |
8214 | sec = NULL; | |
8215 | ||
8216 | if (r_symndx < symtab_hdr->sh_info) | |
8217 | { | |
8218 | sym = local_syms + r_symndx; | |
8219 | sym_type = ELFNN_ST_TYPE (sym->st_info); | |
8220 | sec = local_sections[r_symndx]; | |
8221 | ||
8222 | /* An object file might have a reference to a local | |
8223 | undefined symbol. This is a daft object file, but we | |
8224 | should at least do something about it. */ | |
8225 | if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL | |
8226 | && bfd_is_und_section (sec) | |
8227 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) | |
8228 | (*info->callbacks->undefined_symbol) | |
8229 | (info, bfd_elf_string_from_elf_section | |
8230 | (input_bfd, symtab_hdr->sh_link, sym->st_name), | |
8231 | input_bfd, input_section, rel->r_offset, TRUE); | |
8232 | ||
8233 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
8234 | ||
8235 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
8236 | if (!bfd_link_relocatable (info) | |
8237 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
8238 | { | |
8239 | h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd, | |
8240 | rel, FALSE); | |
8241 | if (h == NULL) | |
8242 | abort (); | |
8243 | ||
8244 | /* Set STT_GNU_IFUNC symbol value. */ | |
8245 | h->root.u.def.value = sym->st_value; | |
8246 | h->root.u.def.section = sec; | |
8247 | } | |
8248 | } | |
8249 | else | |
8250 | { | |
8251 | bfd_boolean warned, ignored; | |
8252 | ||
8253 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
8254 | r_symndx, symtab_hdr, sym_hashes, | |
8255 | h, sec, relocation, | |
8256 | unresolved_reloc, warned, ignored); | |
8257 | ||
8258 | sym_type = h->type; | |
8259 | } | |
8260 | ||
8261 | if (sec != NULL && discarded_section (sec)) | |
8262 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
8263 | rel, 1, relend, howto, 0, contents); | |
8264 | ||
8265 | if (bfd_link_relocatable (info)) | |
8266 | continue; | |
8267 | ||
8268 | if (h != NULL) | |
8269 | name = h->root.root.string; | |
8270 | else | |
8271 | { | |
8272 | name = (bfd_elf_string_from_elf_section | |
8273 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
8274 | if (name == NULL || *name == '\0') | |
8275 | name = bfd_section_name (sec); | |
8276 | } | |
8277 | ||
8278 | if (r_symndx != 0 | |
8279 | && r_type != R_AARCH64_NONE | |
8280 | && r_type != R_AARCH64_NULL | |
8281 | && (h == NULL | |
8282 | || h->root.type == bfd_link_hash_defined | |
8283 | || h->root.type == bfd_link_hash_defweak) | |
8284 | && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS)) | |
8285 | { | |
8286 | _bfd_error_handler | |
8287 | ((sym_type == STT_TLS | |
8288 | /* xgettext:c-format */ | |
8289 | ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s") | |
8290 | /* xgettext:c-format */ | |
8291 | : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")), | |
8292 | input_bfd, | |
8293 | input_section, (uint64_t) rel->r_offset, howto->name, name); | |
8294 | } | |
8295 | ||
8296 | if (r_symndx | |
8297 | && h | |
8298 | && IS_AARCH64_TLS_RELOC (bfd_r_type) | |
8299 | && h->root.type == bfd_link_hash_undefweak) | |
8300 | /* We have already warned about these in aarch64_check_relocs, | |
8301 | so just skip over them. */ | |
8302 | continue; | |
8303 | ||
8304 | /* We relax only if we can see that there can be a valid transition | |
8305 | from a reloc type to another. | |
8306 | We call elfNN_aarch64_final_link_relocate unless we're completely | |
8307 | done, i.e., the relaxation produced the final output we want. */ | |
8308 | ||
8309 | relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, rel, | |
8310 | h, r_symndx); | |
8311 | if (relaxed_bfd_r_type != bfd_r_type) | |
8312 | { | |
8313 | bfd_r_type = relaxed_bfd_r_type; | |
8314 | howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); | |
8315 | BFD_ASSERT (howto != NULL); | |
8316 | r_type = howto->type; | |
8317 | r = elfNN_aarch64_tls_relax (input_bfd, info, input_section, | |
8318 | contents, rel, h, r_symndx); | |
8319 | unresolved_reloc = 0; | |
8320 | } | |
8321 | else | |
8322 | r = bfd_reloc_continue; | |
8323 | ||
8324 | /* There may be multiple consecutive relocations for the | |
8325 | same offset. In that case we are supposed to treat the | |
8326 | output of each relocation as the addend for the next. */ | |
8327 | if (rel + 1 < relend | |
8328 | && rel->r_offset == rel[1].r_offset | |
8329 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE | |
8330 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) | |
8331 | save_addend = TRUE; | |
8332 | else | |
8333 | save_addend = FALSE; | |
8334 | ||
8335 | if (r == bfd_reloc_continue) | |
8336 | r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd, | |
8337 | input_section, contents, rel, | |
8338 | relocation, info, sec, | |
8339 | h, &unresolved_reloc, | |
8340 | save_addend, &addend, sym); | |
8341 | ||
8342 | bfd_boolean c64_rtype = FALSE; | |
8343 | ||
8344 | switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type)) | |
8345 | { | |
8346 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
8347 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
8348 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: | |
8349 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: | |
8350 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: | |
8351 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: | |
8352 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: | |
8353 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: | |
8354 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) | |
8355 | { | |
8356 | bfd_boolean need_relocs = FALSE; | |
8357 | bfd_byte *loc; | |
8358 | int indx; | |
8359 | bfd_vma off; | |
8360 | ||
8361 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
8362 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
8363 | ||
8364 | need_relocs = | |
8365 | (!bfd_link_executable (info) || indx != 0) && | |
8366 | (h == NULL | |
8367 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
8368 | || h->root.type != bfd_link_hash_undefweak); | |
8369 | ||
8370 | BFD_ASSERT (globals->root.srelgot != NULL); | |
8371 | ||
8372 | if (need_relocs) | |
8373 | { | |
8374 | Elf_Internal_Rela rela; | |
8375 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD)); | |
8376 | rela.r_addend = 0; | |
8377 | rela.r_offset = globals->root.sgot->output_section->vma + | |
8378 | globals->root.sgot->output_offset + off; | |
8379 | ||
8380 | ||
8381 | loc = globals->root.srelgot->contents; | |
8382 | loc += globals->root.srelgot->reloc_count++ | |
8383 | * RELOC_SIZE (htab); | |
8384 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
8385 | ||
8386 | bfd_reloc_code_real_type real_type = | |
8387 | elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); | |
8388 | ||
8389 | if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 | |
8390 | || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 | |
8391 | || real_type == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC) | |
8392 | { | |
8393 | /* For local dynamic, don't generate DTPREL in any case. | |
8394 | Initialize the DTPREL slot into zero, so we get module | |
8395 | base address when invoke runtime TLS resolver. */ | |
8396 | bfd_put_NN (output_bfd, 0, | |
8397 | globals->root.sgot->contents + off | |
8398 | + GOT_ENTRY_SIZE (globals)); | |
8399 | } | |
8400 | else if (indx == 0) | |
8401 | { | |
8402 | bfd_put_NN (output_bfd, | |
8403 | relocation - dtpoff_base (info), | |
8404 | globals->root.sgot->contents + off | |
8405 | + GOT_ENTRY_SIZE (globals)); | |
8406 | } | |
8407 | else | |
8408 | { | |
8409 | /* This TLS symbol is global. We emit a | |
8410 | relocation to fixup the tls offset at load | |
8411 | time. */ | |
8412 | rela.r_info = | |
8413 | ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL)); | |
8414 | rela.r_addend = 0; | |
8415 | rela.r_offset = | |
8416 | (globals->root.sgot->output_section->vma | |
8417 | + globals->root.sgot->output_offset + off | |
8418 | + GOT_ENTRY_SIZE (globals)); | |
8419 | ||
8420 | loc = globals->root.srelgot->contents; | |
8421 | loc += globals->root.srelgot->reloc_count++ | |
8422 | * RELOC_SIZE (globals); | |
8423 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
8424 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
8425 | globals->root.sgot->contents + off | |
8426 | + GOT_ENTRY_SIZE (globals)); | |
8427 | } | |
8428 | } | |
8429 | else | |
8430 | { | |
8431 | bfd_put_NN (output_bfd, (bfd_vma) 1, | |
8432 | globals->root.sgot->contents + off); | |
8433 | bfd_put_NN (output_bfd, | |
8434 | relocation - dtpoff_base (info), | |
8435 | globals->root.sgot->contents + off | |
8436 | + GOT_ENTRY_SIZE (globals)); | |
8437 | } | |
8438 | ||
8439 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
8440 | } | |
8441 | break; | |
8442 | ||
8443 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
8444 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: | |
8445 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
8446 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
8447 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: | |
8448 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) | |
8449 | { | |
8450 | bfd_boolean need_relocs = FALSE; | |
8451 | bfd_byte *loc; | |
8452 | int indx; | |
8453 | bfd_vma off; | |
8454 | ||
8455 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
8456 | ||
8457 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
8458 | ||
8459 | need_relocs = | |
8460 | (!bfd_link_executable (info) || indx != 0) && | |
8461 | (h == NULL | |
8462 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
8463 | || h->root.type != bfd_link_hash_undefweak); | |
8464 | ||
8465 | BFD_ASSERT (globals->root.srelgot != NULL); | |
8466 | ||
8467 | if (need_relocs) | |
8468 | { | |
8469 | Elf_Internal_Rela rela; | |
8470 | ||
8471 | if (indx == 0) | |
8472 | rela.r_addend = relocation - dtpoff_base (info); | |
8473 | else | |
8474 | rela.r_addend = 0; | |
8475 | ||
8476 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL)); | |
8477 | rela.r_offset = globals->root.sgot->output_section->vma + | |
8478 | globals->root.sgot->output_offset + off; | |
8479 | ||
8480 | loc = globals->root.srelgot->contents; | |
8481 | loc += globals->root.srelgot->reloc_count++ | |
8482 | * RELOC_SIZE (htab); | |
8483 | ||
8484 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
8485 | ||
8486 | bfd_put_NN (output_bfd, rela.r_addend, | |
8487 | globals->root.sgot->contents + off); | |
8488 | } | |
8489 | else | |
8490 | bfd_put_NN (output_bfd, relocation - tpoff_base (info), | |
8491 | globals->root.sgot->contents + off); | |
8492 | ||
8493 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
8494 | } | |
8495 | break; | |
8496 | ||
8497 | case BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20: | |
8498 | case BFD_RELOC_MORELLO_TLSDESC_LD128_LO12: | |
8499 | c64_rtype = TRUE; | |
8500 | /* Fall through. */ | |
8501 | ||
8502 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: | |
8503 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
8504 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: | |
8505 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: | |
8506 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: | |
8507 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: | |
8508 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: | |
8509 | if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) | |
8510 | { | |
8511 | bfd_boolean need_relocs = FALSE; | |
8512 | int indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
8513 | bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); | |
8514 | ||
8515 | need_relocs = (h == NULL | |
8516 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
8517 | || h->root.type != bfd_link_hash_undefweak); | |
8518 | ||
8519 | BFD_ASSERT (globals->root.srelgot != NULL); | |
8520 | BFD_ASSERT (globals->root.sgot != NULL); | |
8521 | ||
8522 | if (need_relocs) | |
8523 | { | |
8524 | bfd_byte *loc; | |
8525 | Elf_Internal_Rela rela; | |
8526 | ||
8527 | rela.r_info = ELFNN_R_INFO (indx, | |
8528 | (c64_rtype ? MORELLO_R (TLSDESC) | |
8529 | : AARCH64_R (TLSDESC))); | |
8530 | ||
8531 | rela.r_addend = 0; | |
8532 | rela.r_offset = (globals->root.sgotplt->output_section->vma | |
8533 | + globals->root.sgotplt->output_offset | |
8534 | + off + globals->sgotplt_jump_table_size); | |
8535 | ||
8536 | if (indx == 0) | |
8537 | rela.r_addend = relocation - dtpoff_base (info); | |
8538 | ||
8539 | /* Allocate the next available slot in the PLT reloc | |
8540 | section to hold our R_AARCH64_TLSDESC, the next | |
8541 | available slot is determined from reloc_count, | |
8542 | which we step. But note, reloc_count was | |
8543 | artifically moved down while allocating slots for | |
8544 | real PLT relocs such that all of the PLT relocs | |
8545 | will fit above the initial reloc_count and the | |
8546 | extra stuff will fit below. */ | |
8547 | loc = globals->root.srelplt->contents; | |
8548 | loc += globals->root.srelplt->reloc_count++ | |
8549 | * RELOC_SIZE (globals); | |
8550 | ||
8551 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
8552 | ||
8553 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
8554 | globals->root.sgotplt->contents + off + | |
8555 | globals->sgotplt_jump_table_size); | |
8556 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
8557 | globals->root.sgotplt->contents + off + | |
8558 | globals->sgotplt_jump_table_size + | |
8559 | GOT_ENTRY_SIZE (globals)); | |
8560 | } | |
8561 | ||
8562 | symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); | |
8563 | } | |
8564 | break; | |
8565 | default: | |
8566 | break; | |
8567 | } | |
8568 | ||
8569 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
8570 | because such sections are not SEC_ALLOC and thus ld.so will | |
8571 | not process them. */ | |
8572 | if (unresolved_reloc | |
8573 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
8574 | && h->def_dynamic) | |
8575 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
8576 | +rel->r_offset) != (bfd_vma) - 1) | |
8577 | { | |
8578 | _bfd_error_handler | |
8579 | /* xgettext:c-format */ | |
8580 | (_("%pB(%pA+%#" PRIx64 "): " | |
8581 | "unresolvable %s relocation against symbol `%s'"), | |
8582 | input_bfd, input_section, (uint64_t) rel->r_offset, howto->name, | |
8583 | h->root.root.string); | |
8584 | return FALSE; | |
8585 | } | |
8586 | ||
8587 | if (r != bfd_reloc_ok && r != bfd_reloc_continue) | |
8588 | { | |
8589 | bfd_reloc_code_real_type real_r_type | |
8590 | = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); | |
8591 | ||
8592 | switch (r) | |
8593 | { | |
8594 | case bfd_reloc_overflow: | |
8595 | (*info->callbacks->reloc_overflow) | |
8596 | (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, | |
8597 | input_bfd, input_section, rel->r_offset); | |
8598 | if (real_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15 | |
8599 | || real_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14) | |
8600 | { | |
8601 | (*info->callbacks->warning) | |
8602 | (info, | |
8603 | _("too many GOT entries for -fpic, " | |
8604 | "please recompile with -fPIC"), | |
8605 | name, input_bfd, input_section, rel->r_offset); | |
8606 | return FALSE; | |
8607 | } | |
8608 | /* Overflow can occur when a variable is referenced with a type | |
8609 | that has a larger alignment than the type with which it was | |
8610 | declared. eg: | |
8611 | file1.c: extern int foo; int a (void) { return foo; } | |
8612 | file2.c: char bar, foo, baz; | |
8613 | If the variable is placed into a data section at an offset | |
8614 | that is incompatible with the larger alignment requirement | |
8615 | overflow will occur. (Strictly speaking this is not overflow | |
8616 | but rather an alignment problem, but the bfd_reloc_ error | |
8617 | enum does not have a value to cover that situation). | |
8618 | ||
8619 | Try to catch this situation here and provide a more helpful | |
8620 | error message to the user. */ | |
8621 | if (addend & (((bfd_vma) 1 << howto->rightshift) - 1) | |
8622 | /* FIXME: Are we testing all of the appropriate reloc | |
8623 | types here ? */ | |
8624 | && (real_r_type == BFD_RELOC_AARCH64_LD_LO19_PCREL | |
8625 | || real_r_type == BFD_RELOC_AARCH64_LDST16_LO12 | |
8626 | || real_r_type == BFD_RELOC_AARCH64_LDST32_LO12 | |
8627 | || real_r_type == BFD_RELOC_AARCH64_LDST64_LO12 | |
8628 | || real_r_type == BFD_RELOC_AARCH64_LDST128_LO12)) | |
8629 | { | |
8630 | info->callbacks->warning | |
8631 | (info, _("one possible cause of this error is that the \ | |
8632 | symbol is being referenced in the indicated code as if it had a larger \ | |
8633 | alignment than was declared where it was defined"), | |
8634 | name, input_bfd, input_section, rel->r_offset); | |
8635 | } | |
8636 | ||
8637 | if (real_r_type == BFD_RELOC_MORELLO_CAPINIT) | |
8638 | info->callbacks->warning | |
8639 | (info, _("relocation offset must be capability aligned"), | |
8640 | name, input_bfd, input_section, rel->r_offset); | |
8641 | break; | |
8642 | ||
8643 | case bfd_reloc_undefined: | |
8644 | (*info->callbacks->undefined_symbol) | |
8645 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
8646 | break; | |
8647 | ||
8648 | case bfd_reloc_outofrange: | |
8649 | error_message = _("out of range"); | |
8650 | goto common_error; | |
8651 | ||
8652 | case bfd_reloc_notsupported: | |
8653 | error_message = _("unsupported relocation"); | |
8654 | goto common_error; | |
8655 | ||
8656 | case bfd_reloc_dangerous: | |
8657 | /* error_message should already be set. */ | |
8658 | goto common_error; | |
8659 | ||
8660 | default: | |
8661 | error_message = _("unknown error"); | |
8662 | /* Fall through. */ | |
8663 | ||
8664 | common_error: | |
8665 | BFD_ASSERT (error_message != NULL); | |
8666 | (*info->callbacks->reloc_dangerous) | |
8667 | (info, error_message, input_bfd, input_section, rel->r_offset); | |
8668 | break; | |
8669 | } | |
8670 | } | |
8671 | ||
8672 | if (!save_addend) | |
8673 | addend = 0; | |
8674 | } | |
8675 | ||
8676 | return TRUE; | |
8677 | } | |
8678 | ||
8679 | /* Set the right machine number. */ | |
8680 | ||
8681 | static bfd_boolean | |
8682 | elfNN_aarch64_object_p (bfd *abfd) | |
8683 | { | |
8684 | #if ARCH_SIZE == 32 | |
8685 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32); | |
8686 | #else | |
8687 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); | |
8688 | #endif | |
8689 | return TRUE; | |
8690 | } | |
8691 | ||
8692 | /* Function to keep AArch64 specific flags in the ELF header. */ | |
8693 | ||
8694 | static bfd_boolean | |
8695 | elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags) | |
8696 | { | |
8697 | if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) | |
8698 | { | |
8699 | } | |
8700 | else | |
8701 | { | |
8702 | elf_elfheader (abfd)->e_flags = flags; | |
8703 | elf_flags_init (abfd) = TRUE; | |
8704 | } | |
8705 | ||
8706 | return TRUE; | |
8707 | } | |
8708 | ||
8709 | /* Merge backend specific data from an object file to the output | |
8710 | object file when linking. */ | |
8711 | ||
8712 | static bfd_boolean | |
8713 | elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) | |
8714 | { | |
8715 | bfd *obfd = info->output_bfd; | |
8716 | flagword out_flags; | |
8717 | flagword in_flags; | |
8718 | bfd_boolean flags_compatible = FALSE; | |
8719 | asection *sec; | |
8720 | ||
8721 | /* Check if we have the same endianess. */ | |
8722 | if (!_bfd_generic_verify_endian_match (ibfd, info)) | |
8723 | return FALSE; | |
8724 | ||
8725 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) | |
8726 | return TRUE; | |
8727 | ||
8728 | /* The input BFD must have had its flags initialised. */ | |
8729 | /* The following seems bogus to me -- The flags are initialized in | |
8730 | the assembler but I don't think an elf_flags_init field is | |
8731 | written into the object. */ | |
8732 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ | |
8733 | ||
8734 | in_flags = elf_elfheader (ibfd)->e_flags; | |
8735 | out_flags = elf_elfheader (obfd)->e_flags; | |
8736 | ||
8737 | if (!elf_flags_init (obfd)) | |
8738 | { | |
8739 | elf_flags_init (obfd) = TRUE; | |
8740 | ||
8741 | /* If the input is the default architecture and had the default | |
8742 | flags then do not bother setting the flags for the output | |
8743 | architecture, instead allow future merges to do this. If no | |
8744 | future merges ever set these flags then they will retain their | |
8745 | uninitialised values, which surprise surprise, correspond | |
8746 | to the default values. */ | |
8747 | if (bfd_get_arch_info (ibfd)->the_default | |
8748 | && elf_elfheader (ibfd)->e_flags == 0) | |
8749 | return TRUE; | |
8750 | ||
8751 | elf_elfheader (obfd)->e_flags = in_flags; | |
8752 | ||
8753 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
8754 | && bfd_get_arch_info (obfd)->the_default) | |
8755 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
8756 | bfd_get_mach (ibfd)); | |
8757 | ||
8758 | return TRUE; | |
8759 | } | |
8760 | ||
8761 | /* Identical flags must be compatible. */ | |
8762 | if (in_flags == out_flags) | |
8763 | return TRUE; | |
8764 | ||
8765 | /* Check to see if the input BFD actually contains any sections. If | |
8766 | not, its flags may not have been initialised either, but it | |
8767 | cannot actually cause any incompatiblity. Do not short-circuit | |
8768 | dynamic objects; their section list may be emptied by | |
8769 | elf_link_add_object_symbols. | |
8770 | ||
8771 | Also check to see if there are no code sections in the input. | |
8772 | In this case there is no need to check for code specific flags. | |
8773 | XXX - do we need to worry about floating-point format compatability | |
8774 | in data sections ? | |
8775 | ||
8776 | We definitely need to check for data sections if one set of flags is | |
8777 | targetting the PURECAP abi and another is not. Pointers being | |
8778 | capabilities in data sections can not be glossed over. */ | |
8779 | if (!(ibfd->flags & DYNAMIC)) | |
8780 | { | |
8781 | bfd_boolean null_input_bfd = TRUE; | |
8782 | bfd_boolean only_data_sections | |
8783 | = !(in_flags & EF_AARCH64_CHERI_PURECAP | |
8784 | || out_flags & EF_AARCH64_CHERI_PURECAP); | |
8785 | ||
8786 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
8787 | { | |
8788 | if ((bfd_section_flags (sec) | |
8789 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
8790 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
8791 | only_data_sections = FALSE; | |
8792 | ||
8793 | null_input_bfd = FALSE; | |
8794 | break; | |
8795 | } | |
8796 | ||
8797 | if (null_input_bfd || only_data_sections) | |
8798 | return TRUE; | |
8799 | } | |
8800 | ||
8801 | return flags_compatible; | |
8802 | } | |
8803 | ||
8804 | /* Display the flags field. */ | |
8805 | ||
8806 | static bfd_boolean | |
8807 | elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) | |
8808 | { | |
8809 | FILE *file = (FILE *) ptr; | |
8810 | unsigned long flags; | |
8811 | ||
8812 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
8813 | ||
8814 | /* Print normal ELF private data. */ | |
8815 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
8816 | ||
8817 | flags = elf_elfheader (abfd)->e_flags; | |
8818 | /* Ignore init flag - it may not be set, despite the flags field | |
8819 | containing valid data. */ | |
8820 | ||
8821 | /* xgettext:c-format */ | |
8822 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
8823 | ||
8824 | if (flags) | |
8825 | fprintf (file, _("<Unrecognised flag bits set>")); | |
8826 | ||
8827 | fputc ('\n', file); | |
8828 | ||
8829 | return TRUE; | |
8830 | } | |
8831 | ||
8832 | /* Return true if we need copy relocation against EH. */ | |
8833 | ||
8834 | static bfd_boolean | |
8835 | need_copy_relocation_p (struct elf_aarch64_link_hash_entry *eh) | |
8836 | { | |
8837 | struct elf_dyn_relocs *p; | |
8838 | asection *s; | |
8839 | ||
8840 | for (p = eh->root.dyn_relocs; p != NULL; p = p->next) | |
8841 | { | |
8842 | /* If there is any pc-relative reference, we need to keep copy relocation | |
8843 | to avoid propagating the relocation into runtime that current glibc | |
8844 | does not support. */ | |
8845 | if (p->pc_count) | |
8846 | return TRUE; | |
8847 | ||
8848 | s = p->sec->output_section; | |
8849 | /* Need copy relocation if it's against read-only section. */ | |
8850 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
8851 | return TRUE; | |
8852 | } | |
8853 | ||
8854 | return FALSE; | |
8855 | } | |
8856 | ||
8857 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
8858 | regular object. The current definition is in some section of the | |
8859 | dynamic object, but we're not including those sections. We have to | |
8860 | change the definition to something the rest of the link can | |
8861 | understand. */ | |
8862 | ||
8863 | static bfd_boolean | |
8864 | elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, | |
8865 | struct elf_link_hash_entry *h) | |
8866 | { | |
8867 | struct elf_aarch64_link_hash_table *htab; | |
8868 | asection *s, *srel; | |
8869 | ||
8870 | /* If this is a function, put it in the procedure linkage table. We | |
8871 | will fill in the contents of the procedure linkage table later, | |
8872 | when we know the address of the .got section. */ | |
8873 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) | |
8874 | { | |
8875 | if (h->plt.refcount <= 0 | |
8876 | || (h->type != STT_GNU_IFUNC | |
8877 | && (SYMBOL_CALLS_LOCAL (info, h) | |
8878 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
8879 | && h->root.type == bfd_link_hash_undefweak)))) | |
8880 | { | |
8881 | /* This case can occur if we saw a CALL26 reloc in | |
8882 | an input file, but the symbol wasn't referred to | |
8883 | by a dynamic object or all references were | |
8884 | garbage collected. In which case we can end up | |
8885 | resolving. */ | |
8886 | h->plt.offset = (bfd_vma) - 1; | |
8887 | h->needs_plt = 0; | |
8888 | } | |
8889 | ||
8890 | return TRUE; | |
8891 | } | |
8892 | else | |
8893 | /* Otherwise, reset to -1. */ | |
8894 | h->plt.offset = (bfd_vma) - 1; | |
8895 | ||
8896 | ||
8897 | /* If this is a weak symbol, and there is a real definition, the | |
8898 | processor independent code will have arranged for us to see the | |
8899 | real definition first, and we can just use the same value. */ | |
8900 | if (h->is_weakalias) | |
8901 | { | |
8902 | struct elf_link_hash_entry *def = weakdef (h); | |
8903 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
8904 | h->root.u.def.section = def->root.u.def.section; | |
8905 | h->root.u.def.value = def->root.u.def.value; | |
8906 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) | |
8907 | h->non_got_ref = def->non_got_ref; | |
8908 | return TRUE; | |
8909 | } | |
8910 | ||
8911 | /* If we are creating a shared library, we must presume that the | |
8912 | only references to the symbol are via the global offset table. | |
8913 | For such cases we need not do anything here; the relocations will | |
8914 | be handled correctly by relocate_section. */ | |
8915 | if (bfd_link_pic (info)) | |
8916 | return TRUE; | |
8917 | ||
8918 | /* If there are no references to this symbol that do not use the | |
8919 | GOT, we don't need to generate a copy reloc. */ | |
8920 | if (!h->non_got_ref) | |
8921 | return TRUE; | |
8922 | ||
8923 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
8924 | if (info->nocopyreloc) | |
8925 | { | |
8926 | h->non_got_ref = 0; | |
8927 | return TRUE; | |
8928 | } | |
8929 | ||
8930 | if (ELIMINATE_COPY_RELOCS) | |
8931 | { | |
8932 | struct elf_aarch64_link_hash_entry *eh; | |
8933 | /* If we don't find any dynamic relocs in read-only sections, then | |
8934 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
8935 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
8936 | if (!need_copy_relocation_p (eh)) | |
8937 | { | |
8938 | h->non_got_ref = 0; | |
8939 | return TRUE; | |
8940 | } | |
8941 | } | |
8942 | ||
8943 | /* We must allocate the symbol in our .dynbss section, which will | |
8944 | become part of the .bss section of the executable. There will be | |
8945 | an entry for this symbol in the .dynsym section. The dynamic | |
8946 | object will contain position independent code, so all references | |
8947 | from the dynamic object to this symbol will go through the global | |
8948 | offset table. The dynamic linker will use the .dynsym entry to | |
8949 | determine the address it must put in the global offset table, so | |
8950 | both the dynamic object and the regular object will refer to the | |
8951 | same memory location for the variable. */ | |
8952 | ||
8953 | htab = elf_aarch64_hash_table (info); | |
8954 | ||
8955 | /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker | |
8956 | to copy the initial value out of the dynamic object and into the | |
8957 | runtime process image. */ | |
8958 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) | |
8959 | { | |
8960 | s = htab->root.sdynrelro; | |
8961 | srel = htab->root.sreldynrelro; | |
8962 | } | |
8963 | else | |
8964 | { | |
8965 | s = htab->root.sdynbss; | |
8966 | srel = htab->root.srelbss; | |
8967 | } | |
8968 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) | |
8969 | { | |
8970 | srel->size += RELOC_SIZE (htab); | |
8971 | h->needs_copy = 1; | |
8972 | } | |
8973 | ||
8974 | return _bfd_elf_adjust_dynamic_copy (info, h, s); | |
8975 | ||
8976 | } | |
8977 | ||
8978 | static bfd_boolean | |
8979 | elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) | |
8980 | { | |
8981 | struct elf_aarch64_local_symbol *locals; | |
8982 | locals = elf_aarch64_locals (abfd); | |
8983 | if (locals == NULL) | |
8984 | { | |
8985 | locals = (struct elf_aarch64_local_symbol *) | |
8986 | bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); | |
8987 | if (locals == NULL) | |
8988 | return FALSE; | |
8989 | elf_aarch64_locals (abfd) = locals; | |
8990 | } | |
8991 | return TRUE; | |
8992 | } | |
8993 | ||
8994 | /* Initialise the .got section to hold the global offset table. */ | |
8995 | ||
8996 | static void | |
8997 | aarch64_elf_init_got_section (bfd *abfd, struct bfd_link_info *info) | |
8998 | { | |
8999 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9000 | asection *s; | |
9001 | struct elf_aarch64_link_hash_table *globals = elf_aarch64_hash_table (info); | |
9002 | unsigned int align = bed->s->log_file_align + globals->c64_rel; | |
9003 | ||
9004 | if (globals->root.sgot != NULL) | |
9005 | { | |
9006 | bfd_set_section_alignment (globals->root.srelgot, | |
9007 | bed->s->log_file_align); | |
9008 | bfd_set_section_alignment (globals->root.sgot, align); | |
9009 | globals->root.sgot->size += GOT_ENTRY_SIZE (globals); | |
9010 | } | |
9011 | ||
9012 | /* Track capability initialisation for static non-PIE binaries. */ | |
9013 | if (bfd_link_executable (info) && !bfd_link_pic (info) | |
9014 | && globals->srelcaps == NULL) | |
9015 | globals->srelcaps = globals->root.srelgot; | |
9016 | ||
9017 | if (globals->root.igotplt != NULL) | |
9018 | bfd_set_section_alignment (globals->root.igotplt, align); | |
9019 | ||
9020 | s = globals->root.sgot; | |
9021 | ||
9022 | if (globals->root.sgotplt != NULL) | |
9023 | { | |
9024 | bfd_set_section_alignment (globals->root.sgotplt, align); | |
9025 | s = globals->root.sgotplt; | |
9026 | } | |
9027 | ||
9028 | /* The first bit of the global offset table is the header. */ | |
9029 | if (s != NULL) | |
9030 | s->size += bed->got_header_size (info); | |
9031 | } | |
9032 | ||
9033 | /* Create the .got section to hold the global offset table. */ | |
9034 | ||
9035 | static bfd_boolean | |
9036 | aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) | |
9037 | { | |
9038 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9039 | flagword flags; | |
9040 | asection *s; | |
9041 | struct elf_link_hash_entry *h; | |
9042 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
9043 | ||
9044 | /* This function may be called more than once. */ | |
9045 | if (htab->sgot != NULL) | |
9046 | return TRUE; | |
9047 | ||
9048 | flags = bed->dynamic_sec_flags; | |
9049 | ||
9050 | s = bfd_make_section_anyway_with_flags (abfd, | |
9051 | (bed->rela_plts_and_copies_p | |
9052 | ? ".rela.got" : ".rel.got"), | |
9053 | (bed->dynamic_sec_flags | |
9054 | | SEC_READONLY)); | |
9055 | if (s == NULL) | |
9056 | return FALSE; | |
9057 | htab->srelgot = s; | |
9058 | ||
9059 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); | |
9060 | if (s == NULL) | |
9061 | return FALSE; | |
9062 | htab->sgot = s; | |
9063 | ||
9064 | if (bed->want_got_sym) | |
9065 | { | |
9066 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
9067 | (or .got.plt) section. We don't do this in the linker script | |
9068 | because we don't want to define the symbol if we are not creating | |
9069 | a global offset table. */ | |
9070 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
9071 | "_GLOBAL_OFFSET_TABLE_"); | |
9072 | elf_hash_table (info)->hgot = h; | |
9073 | if (h == NULL) | |
9074 | return FALSE; | |
9075 | } | |
9076 | ||
9077 | if (bed->want_got_plt) | |
9078 | { | |
9079 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); | |
9080 | if (s == NULL) | |
9081 | return FALSE; | |
9082 | htab->sgotplt = s; | |
9083 | } | |
9084 | ||
9085 | return TRUE; | |
9086 | } | |
9087 | ||
9088 | /* Look through the relocs for a section during the first phase. */ | |
9089 | ||
9090 | static bfd_boolean | |
9091 | elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
9092 | asection *sec, const Elf_Internal_Rela *relocs) | |
9093 | { | |
9094 | Elf_Internal_Shdr *symtab_hdr; | |
9095 | struct elf_link_hash_entry **sym_hashes; | |
9096 | const Elf_Internal_Rela *rel; | |
9097 | const Elf_Internal_Rela *rel_end; | |
9098 | asection *sreloc; | |
9099 | ||
9100 | struct elf_aarch64_link_hash_table *htab; | |
9101 | ||
9102 | if (bfd_link_relocatable (info)) | |
9103 | return TRUE; | |
9104 | ||
9105 | BFD_ASSERT (is_aarch64_elf (abfd)); | |
9106 | ||
9107 | htab = elf_aarch64_hash_table (info); | |
9108 | sreloc = NULL; | |
9109 | ||
9110 | symtab_hdr = &elf_symtab_hdr (abfd); | |
9111 | sym_hashes = elf_sym_hashes (abfd); | |
9112 | ||
9113 | bfd_elfNN_aarch64_init_maps (abfd, info); | |
9114 | ||
9115 | rel_end = relocs + sec->reloc_count; | |
9116 | for (rel = relocs; rel < rel_end; rel++) | |
9117 | { | |
9118 | struct elf_link_hash_entry *h; | |
9119 | unsigned int r_symndx, r_type; | |
9120 | bfd_reloc_code_real_type bfd_r_type; | |
9121 | Elf_Internal_Sym *isym; | |
9122 | ||
9123 | r_symndx = ELFNN_R_SYM (rel->r_info); | |
9124 | r_type = ELFNN_R_TYPE (rel->r_info); | |
9125 | bfd_r_type = elfNN_aarch64_bfd_reloc_from_type (abfd, r_type); | |
9126 | ||
9127 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
9128 | { | |
9129 | /* xgettext:c-format */ | |
9130 | _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx); | |
9131 | return FALSE; | |
9132 | } | |
9133 | ||
9134 | if (r_symndx < symtab_hdr->sh_info) | |
9135 | { | |
9136 | /* A local symbol. */ | |
9137 | isym = bfd_sym_from_r_symndx (&htab->root.sym_cache, | |
9138 | abfd, r_symndx); | |
9139 | if (isym == NULL) | |
9140 | return FALSE; | |
9141 | ||
9142 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
9143 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
9144 | { | |
9145 | h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, | |
9146 | TRUE); | |
9147 | if (h == NULL) | |
9148 | return FALSE; | |
9149 | ||
9150 | /* Fake a STT_GNU_IFUNC symbol. */ | |
9151 | h->type = STT_GNU_IFUNC; | |
9152 | h->def_regular = 1; | |
9153 | h->ref_regular = 1; | |
9154 | h->forced_local = 1; | |
9155 | h->root.type = bfd_link_hash_defined; | |
9156 | } | |
9157 | else | |
9158 | h = NULL; | |
9159 | } | |
9160 | else | |
9161 | { | |
9162 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9163 | while (h->root.type == bfd_link_hash_indirect | |
9164 | || h->root.type == bfd_link_hash_warning) | |
9165 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9166 | } | |
9167 | ||
9168 | /* Ignore TLS relocations against weak undef symbols and warn about them. | |
9169 | The behaviour of weak TLS variables is not well defined. Since making | |
9170 | these well behaved is not a priority for Morello, we simply ignore | |
9171 | TLS relocations against such symbols here to avoid the linker crashing | |
9172 | on these and to enable making progress in other areas. */ | |
9173 | if (r_symndx | |
9174 | && h | |
9175 | && IS_AARCH64_TLS_RELOC (bfd_r_type) | |
9176 | && h->root.type == bfd_link_hash_undefweak) | |
9177 | { | |
9178 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
9179 | _bfd_error_handler (_("%pB(%pA+%#" PRIx64 "): ignoring TLS relocation " | |
9180 | "%s against undef weak symbol %s"), | |
9181 | abfd, sec, | |
9182 | (uint64_t) rel->r_offset, | |
9183 | elfNN_aarch64_howto_table[howto_index].name, | |
9184 | h->root.root.string); | |
9185 | continue; | |
9186 | } | |
9187 | ||
9188 | /* Could be done earlier, if h were already available. */ | |
9189 | bfd_r_type = aarch64_tls_transition (abfd, info, rel, h, r_symndx); | |
9190 | ||
9191 | if (h != NULL) | |
9192 | { | |
9193 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. | |
9194 | This shows up in particular in an R_AARCH64_PREL64 in large model | |
9195 | when calculating the pc-relative address to .got section which is | |
9196 | used to initialize the gp register. */ | |
9197 | if (h->root.root.string | |
9198 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
9199 | { | |
9200 | if (htab->root.dynobj == NULL) | |
9201 | htab->root.dynobj = abfd; | |
9202 | ||
9203 | if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) | |
9204 | return FALSE; | |
9205 | ||
9206 | BFD_ASSERT (h == htab->root.hgot); | |
9207 | } | |
9208 | ||
9209 | /* Create the ifunc sections for static executables. If we | |
9210 | never see an indirect function symbol nor we are building | |
9211 | a static executable, those sections will be empty and | |
9212 | won't appear in output. */ | |
9213 | switch (bfd_r_type) | |
9214 | { | |
9215 | default: | |
9216 | break; | |
9217 | ||
9218 | case BFD_RELOC_MORELLO_CALL26: | |
9219 | case BFD_RELOC_MORELLO_JUMP26: | |
9220 | /* For dynamic symbols record caller information so that we can | |
9221 | decide what kind of PLT stubs to emit. */ | |
9222 | if (h != NULL) | |
9223 | elf_aarch64_hash_entry (h)->got_type = GOT_CAP; | |
9224 | /* Fall through. */ | |
9225 | ||
9226 | case BFD_RELOC_AARCH64_ADD_LO12: | |
9227 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
9228 | case BFD_RELOC_MORELLO_ADR_GOT_PAGE: | |
9229 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
9230 | case BFD_RELOC_MORELLO_ADR_HI20_PCREL: | |
9231 | case BFD_RELOC_AARCH64_CALL26: | |
9232 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
9233 | case BFD_RELOC_AARCH64_JUMP26: | |
9234 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: | |
9235 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
9236 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: | |
9237 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: | |
9238 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
9239 | case BFD_RELOC_MORELLO_LD128_GOT_LO12_NC: | |
9240 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: | |
9241 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: | |
9242 | case BFD_RELOC_AARCH64_NN: | |
9243 | if (htab->root.dynobj == NULL) | |
9244 | htab->root.dynobj = abfd; | |
9245 | if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info)) | |
9246 | return FALSE; | |
9247 | break; | |
9248 | } | |
9249 | ||
9250 | /* It is referenced by a non-shared object. */ | |
9251 | h->ref_regular = 1; | |
9252 | } | |
9253 | ||
9254 | switch (bfd_r_type) | |
9255 | { | |
9256 | case BFD_RELOC_AARCH64_16: | |
9257 | #if ARCH_SIZE == 64 | |
9258 | case BFD_RELOC_AARCH64_32: | |
9259 | #endif | |
9260 | if (bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0) | |
9261 | { | |
9262 | if (h != NULL | |
9263 | /* This is an absolute symbol. It represents a value instead | |
9264 | of an address. */ | |
9265 | && (bfd_is_abs_symbol (&h->root) | |
9266 | /* This is an undefined symbol. */ | |
9267 | || h->root.type == bfd_link_hash_undefined)) | |
9268 | break; | |
9269 | ||
9270 | /* For local symbols, defined global symbols in a non-ABS section, | |
9271 | it is assumed that the value is an address. */ | |
9272 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
9273 | _bfd_error_handler | |
9274 | /* xgettext:c-format */ | |
9275 | (_("%pB: relocation %s against `%s' can not be used when making " | |
9276 | "a shared object"), | |
9277 | abfd, elfNN_aarch64_howto_table[howto_index].name, | |
9278 | (h) ? h->root.root.string : "a local symbol"); | |
9279 | bfd_set_error (bfd_error_bad_value); | |
9280 | return FALSE; | |
9281 | } | |
9282 | else | |
9283 | break; | |
9284 | ||
9285 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
9286 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
9287 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
9288 | case BFD_RELOC_AARCH64_MOVW_G3: | |
9289 | if (bfd_link_pic (info)) | |
9290 | { | |
9291 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
9292 | _bfd_error_handler | |
9293 | /* xgettext:c-format */ | |
9294 | (_("%pB: relocation %s against `%s' can not be used when making " | |
9295 | "a shared object; recompile with -fPIC"), | |
9296 | abfd, elfNN_aarch64_howto_table[howto_index].name, | |
9297 | (h) ? h->root.root.string : "a local symbol"); | |
9298 | bfd_set_error (bfd_error_bad_value); | |
9299 | return FALSE; | |
9300 | } | |
9301 | /* Fall through. */ | |
9302 | ||
9303 | case BFD_RELOC_AARCH64_16_PCREL: | |
9304 | case BFD_RELOC_AARCH64_32_PCREL: | |
9305 | case BFD_RELOC_AARCH64_64_PCREL: | |
9306 | case BFD_RELOC_AARCH64_ADD_LO12: | |
9307 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
9308 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
9309 | case BFD_RELOC_MORELLO_ADR_HI20_NC_PCREL: | |
9310 | case BFD_RELOC_MORELLO_ADR_HI20_PCREL: | |
9311 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
9312 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
9313 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
9314 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
9315 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
9316 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
9317 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: | |
9318 | case BFD_RELOC_MORELLO_LD_LO17_PCREL: | |
9319 | if (h == NULL || bfd_link_pic (info)) | |
9320 | break; | |
9321 | /* Fall through. */ | |
9322 | ||
9323 | case BFD_RELOC_AARCH64_NN: | |
9324 | ||
9325 | /* We don't need to handle relocs into sections not going into | |
9326 | the "real" output. */ | |
9327 | if ((sec->flags & SEC_ALLOC) == 0) | |
9328 | break; | |
9329 | ||
9330 | if (h != NULL) | |
9331 | { | |
9332 | if (!bfd_link_pic (info)) | |
9333 | h->non_got_ref = 1; | |
9334 | ||
9335 | h->plt.refcount += 1; | |
9336 | h->pointer_equality_needed = 1; | |
9337 | } | |
9338 | ||
9339 | /* No need to do anything if we're not creating a shared | |
9340 | object. */ | |
9341 | if (!(bfd_link_pic (info) | |
9342 | /* If on the other hand, we are creating an executable, we | |
9343 | may need to keep relocations for symbols satisfied by a | |
9344 | dynamic library if we manage to avoid copy relocs for the | |
9345 | symbol. | |
9346 | ||
9347 | NOTE: Currently, there is no support of copy relocs | |
9348 | elimination on pc-relative relocation types, because there is | |
9349 | no dynamic relocation support for them in glibc. We still | |
9350 | record the dynamic symbol reference for them. This is | |
9351 | because one symbol may be referenced by both absolute | |
9352 | relocation (for example, BFD_RELOC_AARCH64_NN) and | |
9353 | pc-relative relocation. We need full symbol reference | |
9354 | information to make correct decision later in | |
9355 | elfNN_aarch64_adjust_dynamic_symbol. */ | |
9356 | || (ELIMINATE_COPY_RELOCS | |
9357 | && !bfd_link_pic (info) | |
9358 | && h != NULL | |
9359 | && (h->root.type == bfd_link_hash_defweak | |
9360 | || !h->def_regular)))) | |
9361 | break; | |
9362 | ||
9363 | { | |
9364 | struct elf_dyn_relocs *p; | |
9365 | struct elf_dyn_relocs **head; | |
9366 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; | |
9367 | ||
9368 | /* We must copy these reloc types into the output file. | |
9369 | Create a reloc section in dynobj and make room for | |
9370 | this reloc. */ | |
9371 | if (sreloc == NULL) | |
9372 | { | |
9373 | if (htab->root.dynobj == NULL) | |
9374 | htab->root.dynobj = abfd; | |
9375 | ||
9376 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
9377 | (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE); | |
9378 | ||
9379 | if (sreloc == NULL) | |
9380 | return FALSE; | |
9381 | } | |
9382 | ||
9383 | /* If this is a global symbol, we count the number of | |
9384 | relocations we need for this symbol. */ | |
9385 | if (h != NULL) | |
9386 | { | |
9387 | head = &h->dyn_relocs; | |
9388 | } | |
9389 | else | |
9390 | { | |
9391 | /* Track dynamic relocs needed for local syms too. | |
9392 | We really need local syms available to do this | |
9393 | easily. Oh well. */ | |
9394 | ||
9395 | asection *s; | |
9396 | void **vpp; | |
9397 | ||
9398 | isym = bfd_sym_from_r_symndx (&htab->root.sym_cache, | |
9399 | abfd, r_symndx); | |
9400 | if (isym == NULL) | |
9401 | return FALSE; | |
9402 | ||
9403 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
9404 | if (s == NULL) | |
9405 | s = sec; | |
9406 | ||
9407 | /* Beware of type punned pointers vs strict aliasing | |
9408 | rules. */ | |
9409 | vpp = &(elf_section_data (s)->local_dynrel); | |
9410 | head = (struct elf_dyn_relocs **) vpp; | |
9411 | } | |
9412 | ||
9413 | p = *head; | |
9414 | if (p == NULL || p->sec != sec) | |
9415 | { | |
9416 | size_t amt = sizeof *p; | |
9417 | p = ((struct elf_dyn_relocs *) | |
9418 | bfd_zalloc (htab->root.dynobj, amt)); | |
9419 | if (p == NULL) | |
9420 | return FALSE; | |
9421 | p->next = *head; | |
9422 | *head = p; | |
9423 | p->sec = sec; | |
9424 | } | |
9425 | ||
9426 | p->count += 1; | |
9427 | ||
9428 | if (elfNN_aarch64_howto_table[howto_index].pc_relative) | |
9429 | p->pc_count += 1; | |
9430 | } | |
9431 | break; | |
9432 | ||
9433 | /* RR: We probably want to keep a consistency check that | |
9434 | there are no dangling GOT_PAGE relocs. */ | |
9435 | case BFD_RELOC_MORELLO_ADR_GOT_PAGE: | |
9436 | case BFD_RELOC_MORELLO_LD128_GOT_LO12_NC: | |
9437 | case BFD_RELOC_MORELLO_TLSDESC_ADR_PAGE20: | |
9438 | case BFD_RELOC_MORELLO_TLSDESC_LD128_LO12: | |
9439 | htab->c64_rel = 1; | |
9440 | /* Fall through. */ | |
9441 | ||
9442 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
9443 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
9444 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: | |
9445 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
9446 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: | |
9447 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: | |
9448 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
9449 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: | |
9450 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: | |
9451 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: | |
9452 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
9453 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: | |
9454 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
9455 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: | |
9456 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: | |
9457 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: | |
9458 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: | |
9459 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
9460 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
9461 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: | |
9462 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: | |
9463 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: | |
9464 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
9465 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: | |
9466 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
9467 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
9468 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
9469 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: | |
9470 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: | |
9471 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: | |
9472 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: | |
9473 | { | |
9474 | unsigned got_type; | |
9475 | unsigned old_got_type; | |
9476 | ||
9477 | got_type = aarch64_reloc_got_type (bfd_r_type); | |
9478 | ||
9479 | if (h) | |
9480 | { | |
9481 | h->got.refcount += 1; | |
9482 | old_got_type = elf_aarch64_hash_entry (h)->got_type; | |
9483 | } | |
9484 | else | |
9485 | { | |
9486 | struct elf_aarch64_local_symbol *locals; | |
9487 | ||
9488 | if (!elfNN_aarch64_allocate_local_symbols | |
9489 | (abfd, symtab_hdr->sh_info)) | |
9490 | return FALSE; | |
9491 | ||
9492 | locals = elf_aarch64_locals (abfd); | |
9493 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); | |
9494 | locals[r_symndx].got_refcount += 1; | |
9495 | old_got_type = locals[r_symndx].got_type; | |
9496 | } | |
9497 | ||
9498 | /* If a variable is accessed with both general dynamic TLS | |
9499 | methods, two slots may be created. */ | |
9500 | if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) | |
9501 | got_type |= old_got_type; | |
9502 | ||
9503 | /* We will already have issued an error message if there | |
9504 | is a TLS/non-TLS mismatch, based on the symbol type. | |
9505 | So just combine any TLS types needed. */ | |
9506 | if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL | |
9507 | && got_type != GOT_NORMAL && old_got_type != GOT_CAP | |
9508 | && got_type != GOT_CAP) | |
9509 | got_type |= old_got_type; | |
9510 | ||
9511 | /* If the symbol is accessed by both IE and GD methods, we | |
9512 | are able to relax. Turn off the GD flag, without | |
9513 | messing up with any other kind of TLS types that may be | |
9514 | involved. */ | |
9515 | if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) | |
9516 | got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); | |
9517 | ||
9518 | /* Prefer the capability reference. */ | |
9519 | if ((old_got_type & GOT_CAP) && (got_type & GOT_NORMAL)) | |
9520 | { | |
9521 | got_type &= ~GOT_NORMAL; | |
9522 | got_type |= GOT_CAP; | |
9523 | } | |
9524 | ||
9525 | if (old_got_type != got_type) | |
9526 | { | |
9527 | if (h != NULL) | |
9528 | elf_aarch64_hash_entry (h)->got_type = got_type; | |
9529 | else | |
9530 | { | |
9531 | struct elf_aarch64_local_symbol *locals; | |
9532 | locals = elf_aarch64_locals (abfd); | |
9533 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); | |
9534 | locals[r_symndx].got_type = got_type; | |
9535 | } | |
9536 | } | |
9537 | ||
9538 | if (htab->root.dynobj == NULL) | |
9539 | htab->root.dynobj = abfd; | |
9540 | if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) | |
9541 | return FALSE; | |
9542 | break; | |
9543 | } | |
9544 | ||
9545 | case BFD_RELOC_MORELLO_CALL26: | |
9546 | case BFD_RELOC_MORELLO_JUMP26: | |
9547 | htab->c64_rel = 1; | |
9548 | if (h != NULL) | |
9549 | elf_aarch64_hash_entry (h)->got_type = GOT_CAP; | |
9550 | ||
9551 | /* Fall through. */ | |
9552 | case BFD_RELOC_AARCH64_CALL26: | |
9553 | case BFD_RELOC_AARCH64_JUMP26: | |
9554 | if (h == NULL) | |
9555 | { | |
9556 | isym = bfd_sym_from_r_symndx (&htab->root.sym_cache, abfd, | |
9557 | r_symndx); | |
9558 | if (isym == NULL) | |
9559 | return FALSE; | |
9560 | ||
9561 | asection *s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
9562 | ||
9563 | if (s == NULL) | |
9564 | s = sec; | |
9565 | ||
9566 | if (c64_value_p (s, isym->st_value)) | |
9567 | isym->st_target_internal |= ST_BRANCH_TO_C64; | |
9568 | ||
9569 | /* If this is a local symbol then we resolve it | |
9570 | directly without creating a PLT entry. */ | |
9571 | continue; | |
9572 | } | |
9573 | ||
9574 | if (h->root.type == bfd_link_hash_defined | |
9575 | || h->root.type == bfd_link_hash_defweak) | |
9576 | { | |
9577 | asection *sym_sec = h->root.u.def.section; | |
9578 | bfd_vma sym_value = h->root.u.def.value; | |
9579 | ||
9580 | if (sym_sec != NULL && c64_value_p (sym_sec, sym_value)) | |
9581 | h->target_internal |= ST_BRANCH_TO_C64; | |
9582 | } | |
9583 | ||
9584 | h->needs_plt = 1; | |
9585 | if (h->plt.refcount <= 0) | |
9586 | h->plt.refcount = 1; | |
9587 | else | |
9588 | h->plt.refcount += 1; | |
9589 | break; | |
9590 | ||
9591 | case BFD_RELOC_MORELLO_CAPINIT: | |
9592 | if (htab->srelcaps == NULL) | |
9593 | { | |
9594 | if (htab->root.dynobj == NULL) | |
9595 | htab->root.dynobj = abfd; | |
9596 | ||
9597 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
9598 | (sec, htab->root.dynobj, LOG_FILE_ALIGN, | |
9599 | abfd, /*rela? */ TRUE); | |
9600 | ||
9601 | if (sreloc == NULL) | |
9602 | return FALSE; | |
9603 | ||
9604 | htab->srelcaps = sreloc; | |
9605 | } | |
9606 | htab->srelcaps->size += RELOC_SIZE (htab); | |
9607 | ||
9608 | break; | |
9609 | ||
9610 | default: | |
9611 | break; | |
9612 | } | |
9613 | } | |
9614 | ||
9615 | return TRUE; | |
9616 | } | |
9617 | ||
9618 | /* Treat mapping symbols as special target symbols. */ | |
9619 | ||
9620 | static bfd_boolean | |
9621 | elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, | |
9622 | asymbol *sym) | |
9623 | { | |
9624 | return bfd_is_aarch64_special_symbol_name (sym->name, | |
9625 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); | |
9626 | } | |
9627 | ||
9628 | /* If the ELF symbol SYM might be a function in SEC, return the | |
9629 | function size and set *CODE_OFF to the function's entry point, | |
9630 | otherwise return zero. */ | |
9631 | ||
9632 | static bfd_size_type | |
9633 | elfNN_aarch64_maybe_function_sym (const asymbol *sym, asection *sec, | |
9634 | bfd_vma *code_off) | |
9635 | { | |
9636 | bfd_size_type size; | |
9637 | ||
9638 | if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT | |
9639 | | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0 | |
9640 | || sym->section != sec) | |
9641 | return 0; | |
9642 | ||
9643 | if (!(sym->flags & BSF_SYNTHETIC)) | |
9644 | switch (ELF_ST_TYPE (((elf_symbol_type *) sym)->internal_elf_sym.st_info)) | |
9645 | { | |
9646 | case STT_FUNC: | |
9647 | case STT_NOTYPE: | |
9648 | break; | |
9649 | default: | |
9650 | return 0; | |
9651 | } | |
9652 | ||
9653 | if ((sym->flags & BSF_LOCAL) | |
9654 | && bfd_is_aarch64_special_symbol_name (sym->name, | |
9655 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)) | |
9656 | return 0; | |
9657 | ||
9658 | *code_off = sym->value; | |
9659 | size = 0; | |
9660 | if (!(sym->flags & BSF_SYNTHETIC)) | |
9661 | size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size; | |
9662 | if (size == 0) | |
9663 | size = 1; | |
9664 | return size; | |
9665 | } | |
9666 | ||
9667 | static bfd_boolean | |
9668 | elfNN_aarch64_find_inliner_info (bfd *abfd, | |
9669 | const char **filename_ptr, | |
9670 | const char **functionname_ptr, | |
9671 | unsigned int *line_ptr) | |
9672 | { | |
9673 | bfd_boolean found; | |
9674 | found = _bfd_dwarf2_find_inliner_info | |
9675 | (abfd, filename_ptr, | |
9676 | functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); | |
9677 | return found; | |
9678 | } | |
9679 | ||
9680 | ||
9681 | static bfd_boolean | |
9682 | elfNN_aarch64_init_file_header (bfd *abfd, struct bfd_link_info *link_info) | |
9683 | { | |
9684 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ | |
9685 | ||
9686 | if (!_bfd_elf_init_file_header (abfd, link_info)) | |
9687 | return FALSE; | |
9688 | ||
9689 | i_ehdrp = elf_elfheader (abfd); | |
9690 | i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; | |
9691 | return TRUE; | |
9692 | } | |
9693 | ||
9694 | static enum elf_reloc_type_class | |
9695 | elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
9696 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
9697 | const Elf_Internal_Rela *rela) | |
9698 | { | |
9699 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
9700 | ||
9701 | if (htab->root.dynsym != NULL | |
9702 | && htab->root.dynsym->contents != NULL) | |
9703 | { | |
9704 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
9705 | dynamic symbols. */ | |
9706 | bfd *abfd = info->output_bfd; | |
9707 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9708 | unsigned long r_symndx = ELFNN_R_SYM (rela->r_info); | |
9709 | if (r_symndx != STN_UNDEF) | |
9710 | { | |
9711 | Elf_Internal_Sym sym; | |
9712 | if (!bed->s->swap_symbol_in (abfd, | |
9713 | (htab->root.dynsym->contents | |
9714 | + r_symndx * bed->s->sizeof_sym), | |
9715 | 0, &sym)) | |
9716 | { | |
9717 | /* xgettext:c-format */ | |
9718 | _bfd_error_handler (_("%pB symbol number %lu references" | |
9719 | " nonexistent SHT_SYMTAB_SHNDX section"), | |
9720 | abfd, r_symndx); | |
9721 | /* Ideally an error class should be returned here. */ | |
9722 | } | |
9723 | else if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
9724 | return reloc_class_ifunc; | |
9725 | } | |
9726 | } | |
9727 | ||
9728 | switch ((int) ELFNN_R_TYPE (rela->r_info)) | |
9729 | { | |
9730 | case AARCH64_R (IRELATIVE): | |
9731 | case MORELLO_R (IRELATIVE): | |
9732 | return reloc_class_ifunc; | |
9733 | case AARCH64_R (RELATIVE): | |
9734 | case MORELLO_R (RELATIVE): | |
9735 | return reloc_class_relative; | |
9736 | case AARCH64_R (JUMP_SLOT): | |
9737 | case MORELLO_R (JUMP_SLOT): | |
9738 | return reloc_class_plt; | |
9739 | case AARCH64_R (COPY): | |
9740 | return reloc_class_copy; | |
9741 | default: | |
9742 | return reloc_class_normal; | |
9743 | } | |
9744 | } | |
9745 | ||
9746 | /* Handle an AArch64 specific section when reading an object file. This is | |
9747 | called when bfd_section_from_shdr finds a section with an unknown | |
9748 | type. */ | |
9749 | ||
9750 | static bfd_boolean | |
9751 | elfNN_aarch64_section_from_shdr (bfd *abfd, | |
9752 | Elf_Internal_Shdr *hdr, | |
9753 | const char *name, int shindex) | |
9754 | { | |
9755 | /* There ought to be a place to keep ELF backend specific flags, but | |
9756 | at the moment there isn't one. We just keep track of the | |
9757 | sections by their name, instead. Fortunately, the ABI gives | |
9758 | names for all the AArch64 specific sections, so we will probably get | |
9759 | away with this. */ | |
9760 | switch (hdr->sh_type) | |
9761 | { | |
9762 | case SHT_AARCH64_ATTRIBUTES: | |
9763 | break; | |
9764 | ||
9765 | default: | |
9766 | return FALSE; | |
9767 | } | |
9768 | ||
9769 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
9770 | return FALSE; | |
9771 | ||
9772 | return TRUE; | |
9773 | } | |
9774 | ||
9775 | typedef struct | |
9776 | { | |
9777 | void *finfo; | |
9778 | struct bfd_link_info *info; | |
9779 | asection *sec; | |
9780 | int sec_shndx; | |
9781 | int (*func) (void *, const char *, Elf_Internal_Sym *, | |
9782 | asection *, struct elf_link_hash_entry *); | |
9783 | } output_arch_syminfo; | |
9784 | ||
9785 | enum map_symbol_type | |
9786 | { | |
9787 | AARCH64_MAP_INSN, | |
9788 | AARCH64_MAP_DATA, | |
9789 | AARCH64_MAP_C64, | |
9790 | }; | |
9791 | ||
9792 | ||
9793 | /* Output a single mapping symbol. */ | |
9794 | ||
9795 | static bfd_boolean | |
9796 | elfNN_aarch64_output_map_sym (output_arch_syminfo *osi, | |
9797 | enum map_symbol_type type, bfd_vma offset) | |
9798 | { | |
9799 | static const char *names[3] = { "$x", "$d", "$c" }; | |
9800 | Elf_Internal_Sym sym; | |
9801 | ||
9802 | sym.st_value = (osi->sec->output_section->vma | |
9803 | + osi->sec->output_offset + offset); | |
9804 | sym.st_size = 0; | |
9805 | sym.st_other = 0; | |
9806 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); | |
9807 | sym.st_shndx = osi->sec_shndx; | |
9808 | sym.st_target_internal = 0; | |
9809 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; | |
9810 | } | |
9811 | ||
9812 | /* Output a single local symbol for a generated stub. */ | |
9813 | ||
9814 | static bfd_boolean | |
9815 | elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, | |
9816 | bfd_vma offset, bfd_vma size) | |
9817 | { | |
9818 | Elf_Internal_Sym sym; | |
9819 | ||
9820 | sym.st_value = (osi->sec->output_section->vma | |
9821 | + osi->sec->output_offset + offset); | |
9822 | sym.st_size = size; | |
9823 | sym.st_other = 0; | |
9824 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); | |
9825 | sym.st_shndx = osi->sec_shndx; | |
9826 | sym.st_target_internal = 0; | |
9827 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; | |
9828 | } | |
9829 | ||
9830 | static bfd_boolean | |
9831 | aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) | |
9832 | { | |
9833 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
9834 | asection *stub_sec; | |
9835 | bfd_vma addr; | |
9836 | char *stub_name; | |
9837 | output_arch_syminfo *osi; | |
9838 | ||
9839 | /* Massage our args to the form they really have. */ | |
9840 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; | |
9841 | osi = (output_arch_syminfo *) in_arg; | |
9842 | ||
9843 | stub_sec = stub_entry->stub_sec; | |
9844 | ||
9845 | /* Ensure this stub is attached to the current section being | |
9846 | processed. */ | |
9847 | if (stub_sec != osi->sec) | |
9848 | return TRUE; | |
9849 | ||
9850 | addr = (bfd_vma) stub_entry->stub_offset; | |
9851 | ||
9852 | stub_name = stub_entry->output_name; | |
9853 | ||
9854 | switch (stub_entry->stub_type) | |
9855 | { | |
9856 | case aarch64_stub_adrp_branch: | |
9857 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, | |
9858 | sizeof (aarch64_adrp_branch_stub))) | |
9859 | return FALSE; | |
9860 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
9861 | return FALSE; | |
9862 | break; | |
9863 | case aarch64_stub_long_branch: | |
9864 | if (!elfNN_aarch64_output_stub_sym | |
9865 | (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) | |
9866 | return FALSE; | |
9867 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
9868 | return FALSE; | |
9869 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) | |
9870 | return FALSE; | |
9871 | break; | |
9872 | case aarch64_stub_erratum_835769_veneer: | |
9873 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, | |
9874 | sizeof (aarch64_erratum_835769_stub))) | |
9875 | return FALSE; | |
9876 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
9877 | return FALSE; | |
9878 | break; | |
9879 | case aarch64_stub_erratum_843419_veneer: | |
9880 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, | |
9881 | sizeof (aarch64_erratum_843419_stub))) | |
9882 | return FALSE; | |
9883 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
9884 | return FALSE; | |
9885 | break; | |
9886 | case aarch64_stub_branch_c64: | |
9887 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, | |
9888 | sizeof (aarch64_c64_branch_stub))) | |
9889 | return FALSE; | |
9890 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_C64, addr)) | |
9891 | return FALSE; | |
9892 | break; | |
9893 | case c64_stub_branch_aarch64: | |
9894 | case c64_stub_branch_c64: | |
9895 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, | |
9896 | sizeof (c64_aarch64_branch_stub))) | |
9897 | return FALSE; | |
9898 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_C64, addr)) | |
9899 | return FALSE; | |
9900 | break; | |
9901 | case aarch64_stub_none: | |
9902 | break; | |
9903 | ||
9904 | default: | |
9905 | abort (); | |
9906 | } | |
9907 | ||
9908 | return TRUE; | |
9909 | } | |
9910 | ||
9911 | /* Output mapping symbols for linker generated sections. */ | |
9912 | ||
9913 | static bfd_boolean | |
9914 | elfNN_aarch64_output_arch_local_syms (bfd *output_bfd, | |
9915 | struct bfd_link_info *info, | |
9916 | void *finfo, | |
9917 | int (*func) (void *, const char *, | |
9918 | Elf_Internal_Sym *, | |
9919 | asection *, | |
9920 | struct elf_link_hash_entry | |
9921 | *)) | |
9922 | { | |
9923 | output_arch_syminfo osi; | |
9924 | struct elf_aarch64_link_hash_table *htab; | |
9925 | ||
9926 | htab = elf_aarch64_hash_table (info); | |
9927 | ||
9928 | osi.finfo = finfo; | |
9929 | osi.info = info; | |
9930 | osi.func = func; | |
9931 | ||
9932 | /* Long calls stubs. */ | |
9933 | if (htab->stub_bfd && htab->stub_bfd->sections) | |
9934 | { | |
9935 | asection *stub_sec; | |
9936 | ||
9937 | for (stub_sec = htab->stub_bfd->sections; | |
9938 | stub_sec != NULL; stub_sec = stub_sec->next) | |
9939 | { | |
9940 | /* Ignore non-stub sections. */ | |
9941 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
9942 | continue; | |
9943 | ||
9944 | osi.sec = stub_sec; | |
9945 | ||
9946 | osi.sec_shndx = _bfd_elf_section_from_bfd_section | |
9947 | (output_bfd, osi.sec->output_section); | |
9948 | ||
9949 | /* The first instruction in a stub is always a branch. */ | |
9950 | if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0)) | |
9951 | return FALSE; | |
9952 | ||
9953 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, | |
9954 | &osi); | |
9955 | } | |
9956 | } | |
9957 | ||
9958 | /* Finally, output mapping symbols for the PLT. */ | |
9959 | if (!htab->root.splt || htab->root.splt->size == 0) | |
9960 | return TRUE; | |
9961 | ||
9962 | osi.sec_shndx = _bfd_elf_section_from_bfd_section | |
9963 | (output_bfd, htab->root.splt->output_section); | |
9964 | osi.sec = htab->root.splt; | |
9965 | ||
9966 | elfNN_aarch64_output_map_sym (&osi, (htab->c64_rel ? AARCH64_MAP_C64 | |
9967 | : AARCH64_MAP_INSN), 0); | |
9968 | ||
9969 | return TRUE; | |
9970 | ||
9971 | } | |
9972 | ||
9973 | /* Allocate target specific section data. */ | |
9974 | ||
9975 | static bfd_boolean | |
9976 | elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec) | |
9977 | { | |
9978 | if (!sec->used_by_bfd) | |
9979 | { | |
9980 | _aarch64_elf_section_data *sdata; | |
9981 | size_t amt = sizeof (*sdata); | |
9982 | ||
9983 | sdata = bfd_zalloc (abfd, amt); | |
9984 | if (sdata == NULL) | |
9985 | return FALSE; | |
9986 | sdata->elf.is_target_section_data = TRUE; | |
9987 | sec->used_by_bfd = sdata; | |
9988 | } | |
9989 | ||
9990 | return _bfd_elf_new_section_hook (abfd, sec); | |
9991 | } | |
9992 | ||
9993 | ||
9994 | /* Create dynamic sections. This is different from the ARM backend in that | |
9995 | the got, plt, gotplt and their relocation sections are all created in the | |
9996 | standard part of the bfd elf backend. */ | |
9997 | ||
9998 | static bfd_boolean | |
9999 | elfNN_aarch64_create_dynamic_sections (bfd *dynobj, | |
10000 | struct bfd_link_info *info) | |
10001 | { | |
10002 | /* We need to create .got section. */ | |
10003 | if (!aarch64_elf_create_got_section (dynobj, info)) | |
10004 | return FALSE; | |
10005 | ||
10006 | return _bfd_elf_create_dynamic_sections (dynobj, info); | |
10007 | } | |
10008 | ||
10009 | ||
10010 | /* Allocate space in .plt, .got and associated reloc sections for | |
10011 | dynamic relocs. */ | |
10012 | ||
10013 | static bfd_boolean | |
10014 | elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) | |
10015 | { | |
10016 | struct bfd_link_info *info; | |
10017 | struct elf_aarch64_link_hash_table *htab; | |
10018 | struct elf_aarch64_link_hash_entry *eh; | |
10019 | struct elf_dyn_relocs *p; | |
10020 | ||
10021 | /* An example of a bfd_link_hash_indirect symbol is versioned | |
10022 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) | |
10023 | -> __gxx_personality_v0(bfd_link_hash_defined) | |
10024 | ||
10025 | There is no need to process bfd_link_hash_indirect symbols here | |
10026 | because we will also be presented with the concrete instance of | |
10027 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been | |
10028 | called to copy all relevant data from the generic to the concrete | |
10029 | symbol instance. */ | |
10030 | if (h->root.type == bfd_link_hash_indirect) | |
10031 | return TRUE; | |
10032 | ||
10033 | if (h->root.type == bfd_link_hash_warning) | |
10034 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10035 | ||
10036 | info = (struct bfd_link_info *) inf; | |
10037 | htab = elf_aarch64_hash_table (info); | |
10038 | ||
10039 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
10040 | here if it is defined and referenced in a non-shared object. */ | |
10041 | if (h->type == STT_GNU_IFUNC | |
10042 | && h->def_regular) | |
10043 | return TRUE; | |
10044 | else if (htab->root.dynamic_sections_created && h->plt.refcount > 0) | |
10045 | { | |
10046 | /* Make sure this symbol is output as a dynamic symbol. | |
10047 | Undefined weak syms won't yet be marked as dynamic. */ | |
10048 | if (h->dynindx == -1 && !h->forced_local | |
10049 | && h->root.type == bfd_link_hash_undefweak) | |
10050 | { | |
10051 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
10052 | return FALSE; | |
10053 | } | |
10054 | ||
10055 | if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
10056 | { | |
10057 | asection *s = htab->root.splt; | |
10058 | ||
10059 | /* If this is the first .plt entry, make room for the special | |
10060 | first entry. */ | |
10061 | if (s->size == 0) | |
10062 | s->size += htab->plt_header_size; | |
10063 | ||
10064 | h->plt.offset = s->size; | |
10065 | ||
10066 | /* If this symbol is not defined in a regular file, and we are | |
10067 | not generating a shared library, then set the symbol to this | |
10068 | location in the .plt. This is required to make function | |
10069 | pointers compare as equal between the normal executable and | |
10070 | the shared library. */ | |
10071 | if (!bfd_link_pic (info) && !h->def_regular) | |
10072 | { | |
10073 | h->root.u.def.section = s; | |
10074 | h->root.u.def.value = h->plt.offset; | |
10075 | } | |
10076 | ||
10077 | /* Make room for this entry. For now we only create the | |
10078 | small model PLT entries. We later need to find a way | |
10079 | of relaxing into these from the large model PLT entries. */ | |
10080 | s->size += htab->plt_entry_size; | |
10081 | ||
10082 | /* We also need to make an entry in the .got.plt section, which | |
10083 | will be placed in the .got section by the linker script. */ | |
10084 | htab->root.sgotplt->size += GOT_ENTRY_SIZE (htab); | |
10085 | ||
10086 | /* We also need to make an entry in the .rela.plt section. */ | |
10087 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
10088 | ||
10089 | /* We need to ensure that all GOT entries that serve the PLT | |
10090 | are consecutive with the special GOT slots [0] [1] and | |
10091 | [2]. Any addtional relocations, such as | |
10092 | R_AARCH64_TLSDESC, must be placed after the PLT related | |
10093 | entries. We abuse the reloc_count such that during | |
10094 | sizing we adjust reloc_count to indicate the number of | |
10095 | PLT related reserved entries. In subsequent phases when | |
10096 | filling in the contents of the reloc entries, PLT related | |
10097 | entries are placed by computing their PLT index (0 | |
10098 | .. reloc_count). While other none PLT relocs are placed | |
10099 | at the slot indicated by reloc_count and reloc_count is | |
10100 | updated. */ | |
10101 | ||
10102 | htab->root.srelplt->reloc_count++; | |
10103 | ||
10104 | /* Mark the DSO in case R_<CLS>_JUMP_SLOT relocs against | |
10105 | variant PCS symbols are present. */ | |
10106 | if (h->other & STO_AARCH64_VARIANT_PCS) | |
10107 | htab->variant_pcs = 1; | |
10108 | ||
10109 | } | |
10110 | else | |
10111 | { | |
10112 | h->plt.offset = (bfd_vma) - 1; | |
10113 | h->needs_plt = 0; | |
10114 | } | |
10115 | } | |
10116 | else | |
10117 | { | |
10118 | h->plt.offset = (bfd_vma) - 1; | |
10119 | h->needs_plt = 0; | |
10120 | } | |
10121 | ||
10122 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
10123 | eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
10124 | ||
10125 | if (h->got.refcount > 0) | |
10126 | { | |
10127 | bfd_boolean dyn; | |
10128 | unsigned got_type = elf_aarch64_hash_entry (h)->got_type; | |
10129 | ||
10130 | h->got.offset = (bfd_vma) - 1; | |
10131 | ||
10132 | dyn = htab->root.dynamic_sections_created; | |
10133 | ||
10134 | /* Make sure this symbol is output as a dynamic symbol. | |
10135 | Undefined weak syms won't yet be marked as dynamic. */ | |
10136 | if (dyn && h->dynindx == -1 && !h->forced_local | |
10137 | && h->root.type == bfd_link_hash_undefweak) | |
10138 | { | |
10139 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
10140 | return FALSE; | |
10141 | } | |
10142 | ||
10143 | if (got_type == GOT_UNKNOWN) | |
10144 | { | |
10145 | } | |
10146 | else if (got_type == GOT_NORMAL | |
10147 | || got_type == GOT_CAP) | |
10148 | { | |
10149 | h->got.offset = htab->root.sgot->size; | |
10150 | htab->root.sgot->size += GOT_ENTRY_SIZE (htab); | |
10151 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
10152 | || h->root.type != bfd_link_hash_undefweak) | |
10153 | && (bfd_link_pic (info) | |
10154 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) | |
10155 | /* Undefined weak symbol in static PIE resolves to 0 without | |
10156 | any dynamic relocations. */ | |
10157 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
10158 | { | |
10159 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
10160 | } | |
10161 | else if (bfd_link_executable (info) && !bfd_link_pic (info)) | |
10162 | htab->srelcaps->size += RELOC_SIZE (htab); | |
10163 | } | |
10164 | else | |
10165 | { | |
10166 | int indx; | |
10167 | if (got_type & GOT_TLSDESC_GD) | |
10168 | { | |
10169 | eh->tlsdesc_got_jump_table_offset = | |
10170 | (htab->root.sgotplt->size | |
10171 | - aarch64_compute_jump_table_size (htab)); | |
10172 | htab->root.sgotplt->size += GOT_ENTRY_SIZE (htab) * 2; | |
10173 | h->got.offset = (bfd_vma) - 2; | |
10174 | } | |
10175 | ||
10176 | if (got_type & GOT_TLS_GD) | |
10177 | { | |
10178 | h->got.offset = htab->root.sgot->size; | |
10179 | htab->root.sgot->size += GOT_ENTRY_SIZE (htab) * 2; | |
10180 | } | |
10181 | ||
10182 | if (got_type & GOT_TLS_IE) | |
10183 | { | |
10184 | h->got.offset = htab->root.sgot->size; | |
10185 | htab->root.sgot->size += GOT_ENTRY_SIZE (htab); | |
10186 | } | |
10187 | ||
10188 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
10189 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
10190 | || h->root.type != bfd_link_hash_undefweak) | |
10191 | && (!bfd_link_executable (info) | |
10192 | || indx != 0 | |
10193 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h) | |
10194 | /* On Morello support only TLSDESC_GD to TLSLE relaxation; | |
10195 | for everything else we must emit a dynamic relocation. */ | |
10196 | || got_type & GOT_CAP)) | |
10197 | { | |
10198 | if (got_type & GOT_TLSDESC_GD) | |
10199 | { | |
10200 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
10201 | /* Note reloc_count not incremented here! We have | |
10202 | already adjusted reloc_count for this relocation | |
10203 | type. */ | |
10204 | ||
10205 | /* TLSDESC PLT is now needed, but not yet determined. */ | |
10206 | htab->root.tlsdesc_plt = (bfd_vma) - 1; | |
10207 | } | |
10208 | ||
10209 | if (got_type & GOT_TLS_GD) | |
10210 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; | |
10211 | ||
10212 | if (got_type & GOT_TLS_IE) | |
10213 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
10214 | } | |
10215 | } | |
10216 | } | |
10217 | else | |
10218 | { | |
10219 | h->got.offset = (bfd_vma) - 1; | |
10220 | } | |
10221 | ||
10222 | if (h->dyn_relocs == NULL) | |
10223 | return TRUE; | |
10224 | ||
10225 | /* In the shared -Bsymbolic case, discard space allocated for | |
10226 | dynamic pc-relative relocs against symbols which turn out to be | |
10227 | defined in regular objects. For the normal shared case, discard | |
10228 | space for pc-relative relocs that have become local due to symbol | |
10229 | visibility changes. */ | |
10230 | ||
10231 | if (bfd_link_pic (info)) | |
10232 | { | |
10233 | /* Relocs that use pc_count are those that appear on a call | |
10234 | insn, or certain REL relocs that can generated via assembly. | |
10235 | We want calls to protected symbols to resolve directly to the | |
10236 | function rather than going via the plt. If people want | |
10237 | function pointer comparisons to work as expected then they | |
10238 | should avoid writing weird assembly. */ | |
10239 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
10240 | { | |
10241 | struct elf_dyn_relocs **pp; | |
10242 | ||
10243 | for (pp = &h->dyn_relocs; (p = *pp) != NULL;) | |
10244 | { | |
10245 | p->count -= p->pc_count; | |
10246 | p->pc_count = 0; | |
10247 | if (p->count == 0) | |
10248 | *pp = p->next; | |
10249 | else | |
10250 | pp = &p->next; | |
10251 | } | |
10252 | } | |
10253 | ||
10254 | /* Also discard relocs on undefined weak syms with non-default | |
10255 | visibility. */ | |
10256 | if (h->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) | |
10257 | { | |
10258 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
10259 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
10260 | h->dyn_relocs = NULL; | |
10261 | ||
10262 | /* Make sure undefined weak symbols are output as a dynamic | |
10263 | symbol in PIEs. */ | |
10264 | else if (h->dynindx == -1 | |
10265 | && !h->forced_local | |
10266 | && h->root.type == bfd_link_hash_undefweak | |
10267 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
10268 | return FALSE; | |
10269 | } | |
10270 | ||
10271 | } | |
10272 | else if (ELIMINATE_COPY_RELOCS) | |
10273 | { | |
10274 | /* For the non-shared case, discard space for relocs against | |
10275 | symbols which turn out to need copy relocs or are not | |
10276 | dynamic. */ | |
10277 | ||
10278 | if (!h->non_got_ref | |
10279 | && ((h->def_dynamic | |
10280 | && !h->def_regular) | |
10281 | || (htab->root.dynamic_sections_created | |
10282 | && (h->root.type == bfd_link_hash_undefweak | |
10283 | || h->root.type == bfd_link_hash_undefined)))) | |
10284 | { | |
10285 | /* Make sure this symbol is output as a dynamic symbol. | |
10286 | Undefined weak syms won't yet be marked as dynamic. */ | |
10287 | if (h->dynindx == -1 | |
10288 | && !h->forced_local | |
10289 | && h->root.type == bfd_link_hash_undefweak | |
10290 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
10291 | return FALSE; | |
10292 | ||
10293 | /* If that succeeded, we know we'll be keeping all the | |
10294 | relocs. */ | |
10295 | if (h->dynindx != -1) | |
10296 | goto keep; | |
10297 | } | |
10298 | ||
10299 | h->dyn_relocs = NULL; | |
10300 | ||
10301 | keep:; | |
10302 | } | |
10303 | ||
10304 | /* Finally, allocate space. */ | |
10305 | for (p = h->dyn_relocs; p != NULL; p = p->next) | |
10306 | { | |
10307 | asection *sreloc; | |
10308 | ||
10309 | sreloc = elf_section_data (p->sec)->sreloc; | |
10310 | ||
10311 | BFD_ASSERT (sreloc != NULL); | |
10312 | ||
10313 | sreloc->size += p->count * RELOC_SIZE (htab); | |
10314 | } | |
10315 | ||
10316 | return TRUE; | |
10317 | } | |
10318 | ||
10319 | /* Allocate space in .plt, .got and associated reloc sections for | |
10320 | ifunc dynamic relocs. */ | |
10321 | ||
10322 | static bfd_boolean | |
10323 | elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, | |
10324 | void *inf) | |
10325 | { | |
10326 | struct bfd_link_info *info; | |
10327 | struct elf_aarch64_link_hash_table *htab; | |
10328 | ||
10329 | /* An example of a bfd_link_hash_indirect symbol is versioned | |
10330 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) | |
10331 | -> __gxx_personality_v0(bfd_link_hash_defined) | |
10332 | ||
10333 | There is no need to process bfd_link_hash_indirect symbols here | |
10334 | because we will also be presented with the concrete instance of | |
10335 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been | |
10336 | called to copy all relevant data from the generic to the concrete | |
10337 | symbol instance. */ | |
10338 | if (h->root.type == bfd_link_hash_indirect) | |
10339 | return TRUE; | |
10340 | ||
10341 | if (h->root.type == bfd_link_hash_warning) | |
10342 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10343 | ||
10344 | info = (struct bfd_link_info *) inf; | |
10345 | htab = elf_aarch64_hash_table (info); | |
10346 | ||
10347 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
10348 | here if it is defined and referenced in a non-shared object. */ | |
10349 | if (h->type == STT_GNU_IFUNC | |
10350 | && h->def_regular) | |
10351 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
10352 | &h->dyn_relocs, | |
10353 | htab->plt_entry_size, | |
10354 | htab->plt_header_size, | |
10355 | GOT_ENTRY_SIZE (htab), | |
10356 | FALSE); | |
10357 | return TRUE; | |
10358 | } | |
10359 | ||
10360 | /* Allocate space in .plt, .got and associated reloc sections for | |
10361 | local ifunc dynamic relocs. */ | |
10362 | ||
10363 | static bfd_boolean | |
10364 | elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf) | |
10365 | { | |
10366 | struct elf_link_hash_entry *h | |
10367 | = (struct elf_link_hash_entry *) *slot; | |
10368 | ||
10369 | if (h->type != STT_GNU_IFUNC | |
10370 | || !h->def_regular | |
10371 | || !h->ref_regular | |
10372 | || !h->forced_local | |
10373 | || h->root.type != bfd_link_hash_defined) | |
10374 | abort (); | |
10375 | ||
10376 | return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf); | |
10377 | } | |
10378 | ||
10379 | /* This is the most important function of all . Innocuosly named | |
10380 | though ! */ | |
10381 | ||
10382 | static bfd_boolean | |
10383 | elfNN_aarch64_size_dynamic_sections (bfd *output_bfd, | |
10384 | struct bfd_link_info *info) | |
10385 | { | |
10386 | struct elf_aarch64_link_hash_table *htab; | |
10387 | bfd *dynobj; | |
10388 | asection *s; | |
10389 | bfd_boolean relocs; | |
10390 | bfd *ibfd; | |
10391 | ||
10392 | htab = elf_aarch64_hash_table ((info)); | |
10393 | dynobj = htab->root.dynobj; | |
10394 | ||
10395 | BFD_ASSERT (dynobj != NULL); | |
10396 | ||
10397 | if (htab->root.dynamic_sections_created) | |
10398 | { | |
10399 | if (bfd_link_executable (info) && !info->nointerp) | |
10400 | { | |
10401 | s = bfd_get_linker_section (dynobj, ".interp"); | |
10402 | if (s == NULL) | |
10403 | abort (); | |
10404 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
10405 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
10406 | } | |
10407 | } | |
10408 | ||
10409 | aarch64_elf_init_got_section (output_bfd, info); | |
10410 | ||
10411 | setup_plt_values (info, elf_aarch64_tdata (output_bfd)->plt_type); | |
10412 | ||
10413 | /* Set up .got offsets for local syms, and space for local dynamic | |
10414 | relocs. */ | |
10415 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
10416 | { | |
10417 | struct elf_aarch64_local_symbol *locals = NULL; | |
10418 | Elf_Internal_Shdr *symtab_hdr; | |
10419 | asection *srel; | |
10420 | unsigned int i; | |
10421 | ||
10422 | if (!is_aarch64_elf (ibfd)) | |
10423 | continue; | |
10424 | ||
10425 | for (s = ibfd->sections; s != NULL; s = s->next) | |
10426 | { | |
10427 | struct elf_dyn_relocs *p; | |
10428 | ||
10429 | for (p = (struct elf_dyn_relocs *) | |
10430 | (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) | |
10431 | { | |
10432 | if (!bfd_is_abs_section (p->sec) | |
10433 | && bfd_is_abs_section (p->sec->output_section)) | |
10434 | { | |
10435 | /* Input section has been discarded, either because | |
10436 | it is a copy of a linkonce section or due to | |
10437 | linker script /DISCARD/, so we'll be discarding | |
10438 | the relocs too. */ | |
10439 | } | |
10440 | else if (p->count != 0) | |
10441 | { | |
10442 | srel = elf_section_data (p->sec)->sreloc; | |
10443 | srel->size += p->count * RELOC_SIZE (htab); | |
10444 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
10445 | info->flags |= DF_TEXTREL; | |
10446 | } | |
10447 | } | |
10448 | } | |
10449 | ||
10450 | locals = elf_aarch64_locals (ibfd); | |
10451 | if (!locals) | |
10452 | continue; | |
10453 | ||
10454 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
10455 | srel = htab->root.srelgot; | |
10456 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
10457 | { | |
10458 | locals[i].got_offset = (bfd_vma) - 1; | |
10459 | locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
10460 | if (locals[i].got_refcount > 0) | |
10461 | { | |
10462 | unsigned got_type = locals[i].got_type; | |
10463 | if (got_type & GOT_TLSDESC_GD) | |
10464 | { | |
10465 | locals[i].tlsdesc_got_jump_table_offset = | |
10466 | (htab->root.sgotplt->size | |
10467 | - aarch64_compute_jump_table_size (htab)); | |
10468 | htab->root.sgotplt->size += GOT_ENTRY_SIZE (htab) * 2; | |
10469 | locals[i].got_offset = (bfd_vma) - 2; | |
10470 | } | |
10471 | ||
10472 | if (got_type & GOT_TLS_GD) | |
10473 | { | |
10474 | locals[i].got_offset = htab->root.sgot->size; | |
10475 | htab->root.sgot->size += GOT_ENTRY_SIZE (htab) * 2; | |
10476 | } | |
10477 | ||
10478 | if (got_type & GOT_TLS_IE | |
10479 | || got_type & GOT_NORMAL | |
10480 | || got_type & GOT_CAP) | |
10481 | { | |
10482 | locals[i].got_offset = htab->root.sgot->size; | |
10483 | htab->root.sgot->size += GOT_ENTRY_SIZE (htab); | |
10484 | } | |
10485 | ||
10486 | if (got_type == GOT_UNKNOWN) | |
10487 | { | |
10488 | } | |
10489 | ||
10490 | if (bfd_link_pic (info)) | |
10491 | { | |
10492 | if (got_type & GOT_TLSDESC_GD) | |
10493 | { | |
10494 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
10495 | /* Note RELOC_COUNT not incremented here! */ | |
10496 | htab->root.tlsdesc_plt = (bfd_vma) - 1; | |
10497 | } | |
10498 | ||
10499 | if (got_type & GOT_TLS_GD) | |
10500 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; | |
10501 | ||
10502 | if (got_type & GOT_TLS_IE | |
10503 | || got_type & GOT_NORMAL | |
10504 | || got_type & GOT_CAP) | |
10505 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
10506 | } | |
10507 | /* Static binary; put relocs into srelcaps. */ | |
10508 | else if (bfd_link_executable (info) && (got_type & GOT_CAP)) | |
10509 | htab->srelcaps->size += RELOC_SIZE (htab); | |
10510 | } | |
10511 | else | |
10512 | { | |
10513 | locals[i].got_refcount = (bfd_vma) - 1; | |
10514 | } | |
10515 | } | |
10516 | } | |
10517 | ||
10518 | ||
10519 | /* Allocate global sym .plt and .got entries, and space for global | |
10520 | sym dynamic relocs. */ | |
10521 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs, | |
10522 | info); | |
10523 | ||
10524 | /* Allocate global ifunc sym .plt and .got entries, and space for global | |
10525 | ifunc sym dynamic relocs. */ | |
10526 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs, | |
10527 | info); | |
10528 | ||
10529 | /* Allocate .plt and .got entries, and space for local ifunc symbols. */ | |
10530 | htab_traverse (htab->loc_hash_table, | |
10531 | elfNN_aarch64_allocate_local_ifunc_dynrelocs, | |
10532 | info); | |
10533 | ||
10534 | if (bfd_link_executable (info) | |
10535 | && !bfd_link_pic (info) | |
10536 | && htab->srelcaps | |
10537 | && htab->srelcaps->size > 0) | |
10538 | { | |
10539 | struct elf_link_hash_entry *h; | |
10540 | ||
10541 | h = _bfd_elf_define_linkage_sym (output_bfd, info, | |
10542 | htab->srelcaps, | |
10543 | "__rela_dyn_start"); | |
10544 | h = _bfd_elf_define_linkage_sym (output_bfd, info, | |
10545 | htab->srelcaps, | |
10546 | "__rela_dyn_end"); | |
10547 | ||
10548 | h->root.u.def.value = htab->srelcaps->vma + htab->srelcaps->size; | |
10549 | } | |
10550 | ||
10551 | /* For every jump slot reserved in the sgotplt, reloc_count is | |
10552 | incremented. However, when we reserve space for TLS descriptors, | |
10553 | it's not incremented, so in order to compute the space reserved | |
10554 | for them, it suffices to multiply the reloc count by the jump | |
10555 | slot size. */ | |
10556 | ||
10557 | if (htab->root.srelplt) | |
10558 | htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); | |
10559 | ||
10560 | if (htab->root.tlsdesc_plt) | |
10561 | { | |
10562 | if (htab->root.splt->size == 0) | |
10563 | htab->root.splt->size += htab->plt_header_size; | |
10564 | ||
10565 | /* If we're not using lazy TLS relocations, don't generate the | |
10566 | GOT and PLT entry required. */ | |
10567 | if ((info->flags & DF_BIND_NOW)) | |
10568 | htab->root.tlsdesc_plt = 0; | |
10569 | else | |
10570 | { | |
10571 | htab->root.tlsdesc_plt = htab->root.splt->size; | |
10572 | htab->root.splt->size += htab->tlsdesc_plt_entry_size; | |
10573 | ||
10574 | htab->root.tlsdesc_got = htab->root.sgot->size; | |
10575 | htab->root.sgot->size += GOT_ENTRY_SIZE (htab); | |
10576 | } | |
10577 | } | |
10578 | ||
10579 | /* Init mapping symbols information to use later to distingush between | |
10580 | code and data while scanning for errata. */ | |
10581 | if (htab->fix_erratum_835769 || htab->fix_erratum_843419) | |
10582 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
10583 | { | |
10584 | if (!is_aarch64_elf (ibfd)) | |
10585 | continue; | |
10586 | bfd_elfNN_aarch64_init_maps (ibfd, info); | |
10587 | } | |
10588 | ||
10589 | /* We now have determined the sizes of the various dynamic sections. | |
10590 | Allocate memory for them. */ | |
10591 | relocs = FALSE; | |
10592 | for (s = dynobj->sections; s != NULL; s = s->next) | |
10593 | { | |
10594 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
10595 | continue; | |
10596 | ||
10597 | if (s == htab->root.splt | |
10598 | || s == htab->root.sgot | |
10599 | || s == htab->root.sgotplt | |
10600 | || s == htab->root.iplt | |
10601 | || s == htab->root.igotplt | |
10602 | || s == htab->root.sdynbss | |
10603 | || s == htab->root.sdynrelro) | |
10604 | { | |
10605 | /* Strip this section if we don't need it; see the | |
10606 | comment below. */ | |
10607 | } | |
10608 | else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) | |
10609 | { | |
10610 | if (s->size != 0 && s != htab->root.srelplt) | |
10611 | relocs = TRUE; | |
10612 | ||
10613 | /* We use the reloc_count field as a counter if we need | |
10614 | to copy relocs into the output file. */ | |
10615 | if (s != htab->root.srelplt) | |
10616 | s->reloc_count = 0; | |
10617 | } | |
10618 | else | |
10619 | { | |
10620 | /* It's not one of our sections, so don't allocate space. */ | |
10621 | continue; | |
10622 | } | |
10623 | ||
10624 | if (s->size == 0) | |
10625 | { | |
10626 | /* If we don't need this section, strip it from the | |
10627 | output file. This is mostly to handle .rela.bss and | |
10628 | .rela.plt. We must create both sections in | |
10629 | create_dynamic_sections, because they must be created | |
10630 | before the linker maps input sections to output | |
10631 | sections. The linker does that before | |
10632 | adjust_dynamic_symbol is called, and it is that | |
10633 | function which decides whether anything needs to go | |
10634 | into these sections. */ | |
10635 | s->flags |= SEC_EXCLUDE; | |
10636 | continue; | |
10637 | } | |
10638 | ||
10639 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
10640 | continue; | |
10641 | ||
10642 | /* Allocate memory for the section contents. We use bfd_zalloc | |
10643 | here in case unused entries are not reclaimed before the | |
10644 | section's contents are written out. This should not happen, | |
10645 | but this way if it does, we get a R_AARCH64_NONE reloc instead | |
10646 | of garbage. */ | |
10647 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
10648 | if (s->contents == NULL) | |
10649 | return FALSE; | |
10650 | } | |
10651 | ||
10652 | if (htab->root.dynamic_sections_created) | |
10653 | { | |
10654 | /* Add some entries to the .dynamic section. We fill in the | |
10655 | values later, in elfNN_aarch64_finish_dynamic_sections, but we | |
10656 | must add the entries now so that we get the correct size for | |
10657 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
10658 | dynamic linker and used by the debugger. */ | |
10659 | #define add_dynamic_entry(TAG, VAL) \ | |
10660 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
10661 | ||
10662 | if (!_bfd_elf_add_dynamic_tags (output_bfd, info, relocs)) | |
10663 | return FALSE; | |
10664 | ||
10665 | if (htab->root.splt->size != 0) | |
10666 | { | |
10667 | if (htab->variant_pcs | |
10668 | && !add_dynamic_entry (DT_AARCH64_VARIANT_PCS, 0)) | |
10669 | return FALSE; | |
10670 | ||
10671 | if ((elf_aarch64_tdata (output_bfd)->plt_type == PLT_BTI_PAC) | |
10672 | && (!add_dynamic_entry (DT_AARCH64_BTI_PLT, 0) | |
10673 | || !add_dynamic_entry (DT_AARCH64_PAC_PLT, 0))) | |
10674 | return FALSE; | |
10675 | ||
10676 | else if ((elf_aarch64_tdata (output_bfd)->plt_type == PLT_BTI) | |
10677 | && !add_dynamic_entry (DT_AARCH64_BTI_PLT, 0)) | |
10678 | return FALSE; | |
10679 | ||
10680 | else if ((elf_aarch64_tdata (output_bfd)->plt_type == PLT_PAC) | |
10681 | && !add_dynamic_entry (DT_AARCH64_PAC_PLT, 0)) | |
10682 | return FALSE; | |
10683 | } | |
10684 | } | |
10685 | #undef add_dynamic_entry | |
10686 | ||
10687 | return TRUE; | |
10688 | } | |
10689 | ||
10690 | static inline void | |
10691 | elf_aarch64_update_plt_entry (bfd *output_bfd, | |
10692 | bfd_reloc_code_real_type r_type, | |
10693 | bfd_byte *plt_entry, bfd_vma value) | |
10694 | { | |
10695 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type); | |
10696 | ||
10697 | /* FIXME: We should check the return value from this function call. */ | |
10698 | (void) _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value); | |
10699 | } | |
10700 | ||
10701 | static void | |
10702 | aarch64_update_c64_plt_entry (bfd *output_bfd, bfd_byte *plt_entry, | |
10703 | bfd_vma plt_base, bfd_vma plt_got_ent) | |
10704 | { | |
10705 | /* Fill in the top 20 bits for this: ADRP c16, PLT_GOT + n * 16. | |
10706 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0xfffff */ | |
10707 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_MORELLO_ADR_HI20_PCREL, | |
10708 | plt_entry, | |
10709 | PG (plt_got_ent) - PG (plt_base)); | |
10710 | ||
10711 | elf_aarch64_update_plt_entry (output_bfd, | |
10712 | BFD_RELOC_AARCH64_LDST128_LO12, | |
10713 | plt_entry + 4, | |
10714 | PG_OFFSET (plt_got_ent)); | |
10715 | ||
10716 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, | |
10717 | plt_entry + 8, | |
10718 | PG_OFFSET (plt_got_ent)); | |
10719 | } | |
10720 | ||
10721 | static void | |
10722 | elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, | |
10723 | struct elf_aarch64_link_hash_table | |
10724 | *htab, bfd *output_bfd, | |
10725 | struct bfd_link_info *info) | |
10726 | { | |
10727 | bfd_byte *plt_entry; | |
10728 | bfd_vma plt_index; | |
10729 | bfd_vma got_offset; | |
10730 | bfd_vma gotplt_entry_address; | |
10731 | bfd_vma plt_entry_address; | |
10732 | Elf_Internal_Rela rela; | |
10733 | bfd_byte *loc; | |
10734 | asection *plt, *gotplt, *relplt; | |
10735 | ||
10736 | /* When building a static executable, use .iplt, .igot.plt and | |
10737 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
10738 | if (htab->root.splt != NULL) | |
10739 | { | |
10740 | plt = htab->root.splt; | |
10741 | gotplt = htab->root.sgotplt; | |
10742 | relplt = htab->root.srelplt; | |
10743 | } | |
10744 | else | |
10745 | { | |
10746 | plt = htab->root.iplt; | |
10747 | gotplt = htab->root.igotplt; | |
10748 | relplt = htab->root.irelplt; | |
10749 | } | |
10750 | ||
10751 | /* Get the index in the procedure linkage table which | |
10752 | corresponds to this symbol. This is the index of this symbol | |
10753 | in all the symbols for which we are making plt entries. The | |
10754 | first entry in the procedure linkage table is reserved. | |
10755 | ||
10756 | Get the offset into the .got table of the entry that | |
10757 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE | |
10758 | bytes. The first three are reserved for the dynamic linker. | |
10759 | ||
10760 | For static executables, we don't reserve anything. */ | |
10761 | ||
10762 | if (plt == htab->root.splt) | |
10763 | { | |
10764 | plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; | |
10765 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE (htab); | |
10766 | } | |
10767 | else | |
10768 | { | |
10769 | plt_index = h->plt.offset / htab->plt_entry_size; | |
10770 | got_offset = plt_index * GOT_ENTRY_SIZE (htab); | |
10771 | } | |
10772 | ||
10773 | plt_entry = plt->contents + h->plt.offset; | |
10774 | plt_entry_address = plt->output_section->vma | |
10775 | + plt->output_offset + h->plt.offset; | |
10776 | gotplt_entry_address = gotplt->output_section->vma + | |
10777 | gotplt->output_offset + got_offset; | |
10778 | ||
10779 | /* Copy in the boiler-plate for the PLTn entry. */ | |
10780 | memcpy (plt_entry, htab->plt_entry, htab->plt_entry_size); | |
10781 | ||
10782 | if (htab->c64_rel) | |
10783 | aarch64_update_c64_plt_entry (output_bfd, plt_entry, plt_entry_address, | |
10784 | gotplt_entry_address); | |
10785 | else | |
10786 | { | |
10787 | ||
10788 | /* First instruction in BTI enabled PLT stub is a BTI | |
10789 | instruction so skip it. */ | |
10790 | if (elf_aarch64_tdata (output_bfd)->plt_type & PLT_BTI | |
10791 | && elf_elfheader (output_bfd)->e_type == ET_EXEC) | |
10792 | plt_entry = plt_entry + 4; | |
10793 | ||
10794 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. | |
10795 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
10796 | elf_aarch64_update_plt_entry (output_bfd, | |
10797 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, | |
10798 | plt_entry, | |
10799 | PG (gotplt_entry_address) - | |
10800 | PG (plt_entry_address)); | |
10801 | ||
10802 | /* Fill in the lo12 bits for the load from the pltgot. */ | |
10803 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, | |
10804 | plt_entry + 4, | |
10805 | PG_OFFSET (gotplt_entry_address)); | |
10806 | ||
10807 | /* Fill in the lo12 bits for the add from the pltgot entry. */ | |
10808 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, | |
10809 | plt_entry + 8, | |
10810 | PG_OFFSET (gotplt_entry_address)); | |
10811 | } | |
10812 | ||
10813 | /* All the GOTPLT Entries are essentially initialized to PLT0. Set LSB if | |
10814 | the PLT is C64. */ | |
10815 | bfd_vma plt0 = ((plt->output_section->vma + plt->output_offset) | |
10816 | | htab->c64_rel); | |
10817 | bfd_put_NN (output_bfd, plt0, gotplt->contents + got_offset); | |
10818 | ||
10819 | rela.r_offset = gotplt_entry_address; | |
10820 | ||
10821 | if (h->dynindx == -1 | |
10822 | || ((bfd_link_executable (info) | |
10823 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
10824 | && h->def_regular | |
10825 | && h->type == STT_GNU_IFUNC)) | |
10826 | { | |
10827 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
10828 | R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */ | |
10829 | rela.r_info = (elf_aarch64_hash_entry (h)->got_type == GOT_CAP | |
10830 | ? ELFNN_R_INFO (0, MORELLO_R (IRELATIVE)) | |
10831 | : ELFNN_R_INFO (0, AARCH64_R (IRELATIVE))); | |
10832 | rela.r_addend = (h->root.u.def.value | |
10833 | + h->root.u.def.section->output_section->vma | |
10834 | + h->root.u.def.section->output_offset); | |
10835 | } | |
10836 | else | |
10837 | { | |
10838 | /* Fill in the entry in the .rela.plt section. */ | |
10839 | rela.r_info = (elf_aarch64_hash_entry (h)->got_type == GOT_CAP | |
10840 | ? ELFNN_R_INFO (h->dynindx, MORELLO_R (JUMP_SLOT)) | |
10841 | : ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT))); | |
10842 | rela.r_addend = 0; | |
10843 | } | |
10844 | ||
10845 | /* Compute the relocation entry to used based on PLT index and do | |
10846 | not adjust reloc_count. The reloc_count has already been adjusted | |
10847 | to account for this entry. */ | |
10848 | loc = relplt->contents + plt_index * RELOC_SIZE (htab); | |
10849 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
10850 | } | |
10851 | ||
10852 | /* Size sections even though they're not dynamic. We use it to setup | |
10853 | _TLS_MODULE_BASE_, if needed. */ | |
10854 | ||
10855 | static bfd_boolean | |
10856 | elfNN_aarch64_always_size_sections (bfd *output_bfd, | |
10857 | struct bfd_link_info *info) | |
10858 | { | |
10859 | asection *tls_sec; | |
10860 | ||
10861 | if (bfd_link_relocatable (info)) | |
10862 | return TRUE; | |
10863 | ||
10864 | tls_sec = elf_hash_table (info)->tls_sec; | |
10865 | ||
10866 | if (tls_sec) | |
10867 | { | |
10868 | struct elf_link_hash_entry *tlsbase; | |
10869 | ||
10870 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
10871 | "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); | |
10872 | ||
10873 | if (tlsbase) | |
10874 | { | |
10875 | struct bfd_link_hash_entry *h = NULL; | |
10876 | const struct elf_backend_data *bed = | |
10877 | get_elf_backend_data (output_bfd); | |
10878 | ||
10879 | if (!(_bfd_generic_link_add_one_symbol | |
10880 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
10881 | tls_sec, 0, NULL, FALSE, bed->collect, &h))) | |
10882 | return FALSE; | |
10883 | ||
10884 | tlsbase->type = STT_TLS; | |
10885 | tlsbase = (struct elf_link_hash_entry *) h; | |
10886 | tlsbase->def_regular = 1; | |
10887 | tlsbase->other = STV_HIDDEN; | |
10888 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
10889 | } | |
10890 | } | |
10891 | ||
10892 | return TRUE; | |
10893 | } | |
10894 | ||
10895 | /* Finish up dynamic symbol handling. We set the contents of various | |
10896 | dynamic sections here. */ | |
10897 | ||
10898 | static bfd_boolean | |
10899 | elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, | |
10900 | struct bfd_link_info *info, | |
10901 | struct elf_link_hash_entry *h, | |
10902 | Elf_Internal_Sym *sym) | |
10903 | { | |
10904 | struct elf_aarch64_link_hash_table *htab; | |
10905 | htab = elf_aarch64_hash_table (info); | |
10906 | ||
10907 | if (h->plt.offset != (bfd_vma) - 1) | |
10908 | { | |
10909 | asection *plt, *gotplt, *relplt; | |
10910 | ||
10911 | /* This symbol has an entry in the procedure linkage table. Set | |
10912 | it up. */ | |
10913 | ||
10914 | /* When building a static executable, use .iplt, .igot.plt and | |
10915 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
10916 | if (htab->root.splt != NULL) | |
10917 | { | |
10918 | plt = htab->root.splt; | |
10919 | gotplt = htab->root.sgotplt; | |
10920 | relplt = htab->root.srelplt; | |
10921 | } | |
10922 | else | |
10923 | { | |
10924 | plt = htab->root.iplt; | |
10925 | gotplt = htab->root.igotplt; | |
10926 | relplt = htab->root.irelplt; | |
10927 | } | |
10928 | ||
10929 | /* This symbol has an entry in the procedure linkage table. Set | |
10930 | it up. */ | |
10931 | if ((h->dynindx == -1 | |
10932 | && !((h->forced_local || bfd_link_executable (info)) | |
10933 | && h->def_regular | |
10934 | && h->type == STT_GNU_IFUNC)) | |
10935 | || plt == NULL | |
10936 | || gotplt == NULL | |
10937 | || relplt == NULL) | |
10938 | return FALSE; | |
10939 | ||
10940 | elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info); | |
10941 | if (!h->def_regular) | |
10942 | { | |
10943 | /* Mark the symbol as undefined, rather than as defined in | |
10944 | the .plt section. */ | |
10945 | sym->st_shndx = SHN_UNDEF; | |
10946 | /* If the symbol is weak we need to clear the value. | |
10947 | Otherwise, the PLT entry would provide a definition for | |
10948 | the symbol even if the symbol wasn't defined anywhere, | |
10949 | and so the symbol would never be NULL. Leave the value if | |
10950 | there were any relocations where pointer equality matters | |
10951 | (this is a clue for the dynamic linker, to make function | |
10952 | pointer comparisons work between an application and shared | |
10953 | library). */ | |
10954 | if (!h->ref_regular_nonweak || !h->pointer_equality_needed) | |
10955 | sym->st_value = 0; | |
10956 | } | |
10957 | } | |
10958 | ||
10959 | bfd_boolean is_c64 = elf_aarch64_hash_entry (h)->got_type == GOT_CAP; | |
10960 | ||
10961 | if (h->got.offset != (bfd_vma) - 1 | |
10962 | && (elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL | |
10963 | || elf_aarch64_hash_entry (h)->got_type == GOT_CAP) | |
10964 | /* Undefined weak symbol in static PIE resolves to 0 without | |
10965 | any dynamic relocations. */ | |
10966 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
10967 | { | |
10968 | Elf_Internal_Rela rela; | |
10969 | bfd_byte *loc; | |
10970 | ||
10971 | /* This symbol has an entry in the global offset table. Set it | |
10972 | up. */ | |
10973 | if (htab->root.sgot == NULL || htab->root.srelgot == NULL) | |
10974 | abort (); | |
10975 | ||
10976 | rela.r_offset = (htab->root.sgot->output_section->vma | |
10977 | + htab->root.sgot->output_offset | |
10978 | + (h->got.offset & ~(bfd_vma) 1)); | |
10979 | ||
10980 | if (h->def_regular | |
10981 | && h->type == STT_GNU_IFUNC) | |
10982 | { | |
10983 | if (bfd_link_pic (info)) | |
10984 | { | |
10985 | /* Generate R_AARCH64_GLOB_DAT. */ | |
10986 | goto do_glob_dat; | |
10987 | } | |
10988 | else | |
10989 | { | |
10990 | asection *plt; | |
10991 | ||
10992 | if (!h->pointer_equality_needed) | |
10993 | abort (); | |
10994 | ||
10995 | /* For non-shared object, we can't use .got.plt, which | |
10996 | contains the real function address if we need pointer | |
10997 | equality. We load the GOT entry with the PLT entry. */ | |
10998 | plt = htab->root.splt ? htab->root.splt : htab->root.iplt; | |
10999 | bfd_put_NN (output_bfd, (plt->output_section->vma | |
11000 | + plt->output_offset | |
11001 | + h->plt.offset), | |
11002 | htab->root.sgot->contents | |
11003 | + (h->got.offset & ~(bfd_vma) 1)); | |
11004 | return TRUE; | |
11005 | } | |
11006 | } | |
11007 | else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) | |
11008 | { | |
11009 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) | |
11010 | return FALSE; | |
11011 | ||
11012 | BFD_ASSERT ((h->got.offset & 1) != 0); | |
11013 | if (is_c64) | |
11014 | { | |
11015 | rela.r_info = ELFNN_R_INFO (0, MORELLO_R (RELATIVE)); | |
11016 | rela.r_addend = 0; | |
11017 | } | |
11018 | else | |
11019 | { | |
11020 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); | |
11021 | rela.r_addend = (h->root.u.def.value | |
11022 | + h->root.u.def.section->output_section->vma | |
11023 | + h->root.u.def.section->output_offset); | |
11024 | } | |
11025 | } | |
11026 | else | |
11027 | { | |
11028 | do_glob_dat: | |
11029 | BFD_ASSERT ((h->got.offset & 1) == 0); | |
11030 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
11031 | htab->root.sgot->contents + h->got.offset); | |
11032 | rela.r_info = ELFNN_R_INFO (h->dynindx, | |
11033 | (is_c64 ? MORELLO_R (GLOB_DAT) | |
11034 | : AARCH64_R (GLOB_DAT))); | |
11035 | rela.r_addend = 0; | |
11036 | } | |
11037 | ||
11038 | loc = htab->root.srelgot->contents; | |
11039 | loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); | |
11040 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
11041 | } | |
11042 | ||
11043 | if (h->needs_copy) | |
11044 | { | |
11045 | Elf_Internal_Rela rela; | |
11046 | asection *s; | |
11047 | bfd_byte *loc; | |
11048 | ||
11049 | /* This symbol needs a copy reloc. Set it up. */ | |
11050 | if (h->dynindx == -1 | |
11051 | || (h->root.type != bfd_link_hash_defined | |
11052 | && h->root.type != bfd_link_hash_defweak) | |
11053 | || htab->root.srelbss == NULL) | |
11054 | abort (); | |
11055 | ||
11056 | rela.r_offset = (h->root.u.def.value | |
11057 | + h->root.u.def.section->output_section->vma | |
11058 | + h->root.u.def.section->output_offset); | |
11059 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY)); | |
11060 | rela.r_addend = 0; | |
11061 | if (h->root.u.def.section == htab->root.sdynrelro) | |
11062 | s = htab->root.sreldynrelro; | |
11063 | else | |
11064 | s = htab->root.srelbss; | |
11065 | loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab); | |
11066 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); | |
11067 | } | |
11068 | ||
11069 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may | |
11070 | be NULL for local symbols. */ | |
11071 | if (sym != NULL | |
11072 | && (h == elf_hash_table (info)->hdynamic | |
11073 | || h == elf_hash_table (info)->hgot)) | |
11074 | sym->st_shndx = SHN_ABS; | |
11075 | ||
11076 | return TRUE; | |
11077 | } | |
11078 | ||
11079 | /* Finish up local dynamic symbol handling. We set the contents of | |
11080 | various dynamic sections here. */ | |
11081 | ||
11082 | static bfd_boolean | |
11083 | elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf) | |
11084 | { | |
11085 | struct elf_link_hash_entry *h | |
11086 | = (struct elf_link_hash_entry *) *slot; | |
11087 | struct bfd_link_info *info | |
11088 | = (struct bfd_link_info *) inf; | |
11089 | ||
11090 | return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd, | |
11091 | info, h, NULL); | |
11092 | } | |
11093 | ||
11094 | static void | |
11095 | elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, | |
11096 | struct elf_aarch64_link_hash_table | |
11097 | *htab) | |
11098 | { | |
11099 | /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between | |
11100 | small and large plts and at the minute just generates | |
11101 | the small PLT. */ | |
11102 | ||
11103 | /* PLT0 of the small PLT looks like this in ELF64 - | |
11104 | stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. | |
11105 | adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT | |
11106 | ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the | |
11107 | // symbol resolver | |
11108 | add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the | |
11109 | // GOTPLT entry for this. | |
11110 | br x17 | |
11111 | PLT0 will be slightly different in ELF32 due to different got entry | |
11112 | size. */ | |
11113 | bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */ | |
11114 | bfd_vma plt_base; | |
11115 | ||
11116 | ||
11117 | memcpy (htab->root.splt->contents, htab->plt0_entry, | |
11118 | htab->plt_header_size); | |
11119 | ||
11120 | /* PR 26312: Explicitly set the sh_entsize to 0 so that | |
11121 | consumers do not think that the section contains fixed | |
11122 | sized objects. */ | |
11123 | elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = 0; | |
11124 | ||
11125 | plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma | |
11126 | + htab->root.sgotplt->output_offset | |
11127 | + GOT_ENTRY_SIZE (htab) * 2); | |
11128 | ||
11129 | plt_base = htab->root.splt->output_section->vma + | |
11130 | htab->root.splt->output_offset; | |
11131 | ||
11132 | bfd_byte *plt0_entry = htab->root.splt->contents; | |
11133 | ||
11134 | if (htab->c64_rel) | |
11135 | { | |
11136 | aarch64_update_c64_plt_entry (output_bfd, plt0_entry + 4, | |
11137 | plt_base + 4, plt_got_2nd_ent); | |
11138 | return; | |
11139 | } | |
11140 | ||
11141 | /* First instruction in BTI enabled PLT stub is a BTI | |
11142 | instruction so skip it. */ | |
11143 | if (elf_aarch64_tdata (output_bfd)->plt_type & PLT_BTI) | |
11144 | plt0_entry = plt0_entry + 4; | |
11145 | ||
11146 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. | |
11147 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
11148 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, | |
11149 | plt0_entry + 4, | |
11150 | PG (plt_got_2nd_ent) - PG (plt_base + 4)); | |
11151 | ||
11152 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, | |
11153 | plt0_entry + 8, | |
11154 | PG_OFFSET (plt_got_2nd_ent)); | |
11155 | ||
11156 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, | |
11157 | plt0_entry + 12, | |
11158 | PG_OFFSET (plt_got_2nd_ent)); | |
11159 | } | |
11160 | ||
11161 | static bfd_boolean | |
11162 | elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd, | |
11163 | struct bfd_link_info *info) | |
11164 | { | |
11165 | struct elf_aarch64_link_hash_table *htab; | |
11166 | bfd *dynobj; | |
11167 | asection *sdyn; | |
11168 | ||
11169 | htab = elf_aarch64_hash_table (info); | |
11170 | dynobj = htab->root.dynobj; | |
11171 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
11172 | ||
11173 | if (htab->root.dynamic_sections_created) | |
11174 | { | |
11175 | ElfNN_External_Dyn *dyncon, *dynconend; | |
11176 | ||
11177 | if (sdyn == NULL || htab->root.sgot == NULL) | |
11178 | abort (); | |
11179 | ||
11180 | dyncon = (ElfNN_External_Dyn *) sdyn->contents; | |
11181 | dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); | |
11182 | for (; dyncon < dynconend; dyncon++) | |
11183 | { | |
11184 | Elf_Internal_Dyn dyn; | |
11185 | asection *s; | |
11186 | ||
11187 | bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); | |
11188 | ||
11189 | switch (dyn.d_tag) | |
11190 | { | |
11191 | default: | |
11192 | continue; | |
11193 | ||
11194 | case DT_PLTGOT: | |
11195 | s = htab->root.sgotplt; | |
11196 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
11197 | break; | |
11198 | ||
11199 | case DT_JMPREL: | |
11200 | s = htab->root.srelplt; | |
11201 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
11202 | break; | |
11203 | ||
11204 | case DT_PLTRELSZ: | |
11205 | s = htab->root.srelplt; | |
11206 | dyn.d_un.d_val = s->size; | |
11207 | break; | |
11208 | ||
11209 | case DT_TLSDESC_PLT: | |
11210 | s = htab->root.splt; | |
11211 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
11212 | + htab->root.tlsdesc_plt; | |
11213 | break; | |
11214 | ||
11215 | case DT_TLSDESC_GOT: | |
11216 | s = htab->root.sgot; | |
11217 | BFD_ASSERT (htab->root.tlsdesc_got != (bfd_vma)-1); | |
11218 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
11219 | + htab->root.tlsdesc_got; | |
11220 | break; | |
11221 | } | |
11222 | ||
11223 | bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon); | |
11224 | } | |
11225 | ||
11226 | } | |
11227 | ||
11228 | /* Fill in the special first entry in the procedure linkage table. */ | |
11229 | if (htab->root.splt && htab->root.splt->size > 0) | |
11230 | { | |
11231 | elfNN_aarch64_init_small_plt0_entry (output_bfd, htab); | |
11232 | ||
11233 | if (htab->root.tlsdesc_plt && !(info->flags & DF_BIND_NOW)) | |
11234 | { | |
11235 | BFD_ASSERT (htab->root.tlsdesc_got != (bfd_vma)-1); | |
11236 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
11237 | htab->root.sgot->contents + htab->root.tlsdesc_got); | |
11238 | ||
11239 | const bfd_byte *entry = elfNN_aarch64_tlsdesc_small_plt_entry; | |
11240 | htab->tlsdesc_plt_entry_size = PLT_TLSDESC_ENTRY_SIZE; | |
11241 | ||
11242 | unsigned adrp_rtype = BFD_RELOC_AARCH64_ADR_HI21_PCREL; | |
11243 | unsigned ldr_rtype = BFD_RELOC_AARCH64_LDSTNN_LO12; | |
11244 | ||
11245 | aarch64_plt_type type = elf_aarch64_tdata (output_bfd)->plt_type; | |
11246 | if (htab->c64_rel) | |
11247 | { | |
11248 | entry = elfNN_aarch64_tlsdesc_small_plt_c64_entry; | |
11249 | adrp_rtype = BFD_RELOC_MORELLO_ADR_HI20_PCREL; | |
11250 | ldr_rtype = BFD_RELOC_AARCH64_LDST128_LO12; | |
11251 | } | |
11252 | else if (type == PLT_BTI || type == PLT_BTI_PAC) | |
11253 | { | |
11254 | entry = elfNN_aarch64_tlsdesc_small_plt_bti_entry; | |
11255 | } | |
11256 | ||
11257 | memcpy (htab->root.splt->contents + htab->root.tlsdesc_plt, | |
11258 | entry, htab->tlsdesc_plt_entry_size); | |
11259 | ||
11260 | { | |
11261 | bfd_vma adrp1_addr = | |
11262 | htab->root.splt->output_section->vma | |
11263 | + htab->root.splt->output_offset | |
11264 | + htab->root.tlsdesc_plt + 4; | |
11265 | ||
11266 | bfd_vma adrp2_addr = adrp1_addr + 4; | |
11267 | ||
11268 | bfd_vma got_addr = | |
11269 | htab->root.sgot->output_section->vma | |
11270 | + htab->root.sgot->output_offset; | |
11271 | ||
11272 | bfd_vma pltgot_addr = | |
11273 | htab->root.sgotplt->output_section->vma | |
11274 | + htab->root.sgotplt->output_offset; | |
11275 | ||
11276 | bfd_vma dt_tlsdesc_got = got_addr + htab->root.tlsdesc_got; | |
11277 | ||
11278 | bfd_byte *plt_entry = | |
11279 | htab->root.splt->contents + htab->root.tlsdesc_plt; | |
11280 | ||
11281 | /* First instruction in BTI enabled PLT stub is a BTI | |
11282 | instruction so skip it. */ | |
11283 | if (type & PLT_BTI) | |
11284 | { | |
11285 | plt_entry = plt_entry + 4; | |
11286 | adrp1_addr = adrp1_addr + 4; | |
11287 | adrp2_addr = adrp2_addr + 4; | |
11288 | } | |
11289 | ||
11290 | /* adrp x2, DT_TLSDESC_GOT */ | |
11291 | elf_aarch64_update_plt_entry (output_bfd, | |
11292 | adrp_rtype, | |
11293 | plt_entry + 4, | |
11294 | (PG (dt_tlsdesc_got) | |
11295 | - PG (adrp1_addr))); | |
11296 | ||
11297 | /* adrp x3, 0 */ | |
11298 | elf_aarch64_update_plt_entry (output_bfd, | |
11299 | adrp_rtype, | |
11300 | plt_entry + 8, | |
11301 | (PG (pltgot_addr) | |
11302 | - PG (adrp2_addr))); | |
11303 | ||
11304 | /* ldr x2, [x2, #0] */ | |
11305 | elf_aarch64_update_plt_entry (output_bfd, | |
11306 | ldr_rtype, | |
11307 | plt_entry + 12, | |
11308 | PG_OFFSET (dt_tlsdesc_got)); | |
11309 | ||
11310 | /* add x3, x3, 0 */ | |
11311 | elf_aarch64_update_plt_entry (output_bfd, | |
11312 | BFD_RELOC_AARCH64_ADD_LO12, | |
11313 | plt_entry + 16, | |
11314 | PG_OFFSET (pltgot_addr)); | |
11315 | } | |
11316 | } | |
11317 | } | |
11318 | ||
11319 | if (htab->root.sgotplt) | |
11320 | { | |
11321 | if (bfd_is_abs_section (htab->root.sgotplt->output_section)) | |
11322 | { | |
11323 | _bfd_error_handler | |
11324 | (_("discarded output section: `%pA'"), htab->root.sgotplt); | |
11325 | return FALSE; | |
11326 | } | |
11327 | ||
11328 | /* Fill in the first three entries in the global offset table. */ | |
11329 | if (htab->root.sgotplt->size > 0) | |
11330 | { | |
11331 | bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents); | |
11332 | ||
11333 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
11334 | bfd_put_NN (output_bfd, | |
11335 | (bfd_vma) 0, | |
11336 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE (htab)); | |
11337 | bfd_put_NN (output_bfd, | |
11338 | (bfd_vma) 0, | |
11339 | (htab->root.sgotplt->contents | |
11340 | + GOT_ENTRY_SIZE (htab) * 2)); | |
11341 | } | |
11342 | ||
11343 | if (htab->root.sgot) | |
11344 | { | |
11345 | if (htab->root.sgot->size > 0) | |
11346 | { | |
11347 | bfd_vma addr = | |
11348 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0; | |
11349 | bfd_put_NN (output_bfd, addr, htab->root.sgot->contents); | |
11350 | } | |
11351 | } | |
11352 | ||
11353 | elf_section_data (htab->root.sgotplt->output_section)-> | |
11354 | this_hdr.sh_entsize = GOT_ENTRY_SIZE (htab); | |
11355 | } | |
11356 | ||
11357 | if (htab->root.sgot && htab->root.sgot->size > 0) | |
11358 | elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize | |
11359 | = GOT_ENTRY_SIZE (htab); | |
11360 | ||
11361 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
11362 | htab_traverse (htab->loc_hash_table, | |
11363 | elfNN_aarch64_finish_local_dynamic_symbol, | |
11364 | info); | |
11365 | ||
11366 | return TRUE; | |
11367 | } | |
11368 | ||
11369 | /* Check if BTI enabled PLTs are needed. Returns the type needed. */ | |
11370 | static aarch64_plt_type | |
11371 | get_plt_type (bfd *abfd) | |
11372 | { | |
11373 | aarch64_plt_type ret = PLT_NORMAL; | |
11374 | bfd_byte *contents, *extdyn, *extdynend; | |
11375 | asection *sec = bfd_get_section_by_name (abfd, ".dynamic"); | |
11376 | if (!sec || !bfd_malloc_and_get_section (abfd, sec, &contents)) | |
11377 | return ret; | |
11378 | extdyn = contents; | |
11379 | extdynend = contents + sec->size; | |
11380 | for (; extdyn < extdynend; extdyn += sizeof (ElfNN_External_Dyn)) | |
11381 | { | |
11382 | Elf_Internal_Dyn dyn; | |
11383 | bfd_elfNN_swap_dyn_in (abfd, extdyn, &dyn); | |
11384 | ||
11385 | /* Let's check the processor specific dynamic array tags. */ | |
11386 | bfd_vma tag = dyn.d_tag; | |
11387 | if (tag < DT_LOPROC || tag > DT_HIPROC) | |
11388 | continue; | |
11389 | ||
11390 | switch (tag) | |
11391 | { | |
11392 | case DT_AARCH64_BTI_PLT: | |
11393 | ret |= PLT_BTI; | |
11394 | break; | |
11395 | ||
11396 | case DT_AARCH64_PAC_PLT: | |
11397 | ret |= PLT_PAC; | |
11398 | break; | |
11399 | ||
11400 | default: break; | |
11401 | } | |
11402 | } | |
11403 | free (contents); | |
11404 | return ret; | |
11405 | } | |
11406 | ||
11407 | static long | |
11408 | elfNN_aarch64_get_synthetic_symtab (bfd *abfd, | |
11409 | long symcount, | |
11410 | asymbol **syms, | |
11411 | long dynsymcount, | |
11412 | asymbol **dynsyms, | |
11413 | asymbol **ret) | |
11414 | { | |
11415 | elf_aarch64_tdata (abfd)->plt_type = get_plt_type (abfd); | |
11416 | return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, | |
11417 | dynsymcount, dynsyms, ret); | |
11418 | } | |
11419 | ||
11420 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
11421 | or (bfd_vma) -1 if it should not be included. */ | |
11422 | ||
11423 | static bfd_vma | |
11424 | elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt, | |
11425 | const arelent *rel ATTRIBUTE_UNUSED) | |
11426 | { | |
11427 | size_t plt0_size = PLT_ENTRY_SIZE; | |
11428 | size_t pltn_size = PLT_SMALL_ENTRY_SIZE; | |
11429 | ||
11430 | if (elf_aarch64_tdata (plt->owner)->plt_type == PLT_BTI_PAC) | |
11431 | { | |
11432 | if (elf_elfheader (plt->owner)->e_type == ET_EXEC) | |
11433 | pltn_size = PLT_BTI_PAC_SMALL_ENTRY_SIZE; | |
11434 | else | |
11435 | pltn_size = PLT_PAC_SMALL_ENTRY_SIZE; | |
11436 | } | |
11437 | else if (elf_aarch64_tdata (plt->owner)->plt_type == PLT_BTI) | |
11438 | { | |
11439 | if (elf_elfheader (plt->owner)->e_type == ET_EXEC) | |
11440 | pltn_size = PLT_BTI_SMALL_ENTRY_SIZE; | |
11441 | } | |
11442 | else if (elf_aarch64_tdata (plt->owner)->plt_type == PLT_PAC) | |
11443 | { | |
11444 | pltn_size = PLT_PAC_SMALL_ENTRY_SIZE; | |
11445 | } | |
11446 | ||
11447 | return plt->vma + plt0_size + i * pltn_size; | |
11448 | } | |
11449 | ||
11450 | /* Returns TRUE if NAME is an AArch64 mapping symbol. | |
11451 | The ARM ELF standard defines $x (for A64 code) and $d (for data). | |
11452 | It also allows a period initiated suffix to be added to the symbol, ie: | |
11453 | "$[adtx]\.[:sym_char]+". */ | |
11454 | ||
11455 | static bfd_boolean | |
11456 | is_aarch64_mapping_symbol (const char * name) | |
11457 | { | |
11458 | return name != NULL /* Paranoia. */ | |
11459 | && name[0] == '$' /* Note: if objcopy --prefix-symbols has been used then | |
11460 | the mapping symbols could have acquired a prefix. | |
11461 | We do not support this here, since such symbols no | |
11462 | longer conform to the ARM ELF ABI. */ | |
11463 | && (name[1] == 'd' || name[1] == 'x' || name[1] == 'c') | |
11464 | && (name[2] == 0 || name[2] == '.'); | |
11465 | /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if | |
11466 | any characters that follow the period are legal characters for the body | |
11467 | of a symbol's name. For now we just assume that this is the case. */ | |
11468 | } | |
11469 | ||
11470 | /* Make sure that mapping symbols in object files are not removed via the | |
11471 | "strip --strip-unneeded" tool. These symbols might needed in order to | |
11472 | correctly generate linked files. Once an object file has been linked, | |
11473 | it should be safe to remove them. */ | |
11474 | ||
11475 | static void | |
11476 | elfNN_aarch64_backend_symbol_processing (bfd *abfd, asymbol *sym) | |
11477 | { | |
11478 | if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
11479 | && sym->section != bfd_abs_section_ptr | |
11480 | && is_aarch64_mapping_symbol (sym->name)) | |
11481 | sym->flags |= BSF_KEEP; | |
11482 | } | |
11483 | ||
11484 | /* Implement elf_backend_setup_gnu_properties for AArch64. It serves as a | |
11485 | wrapper function for _bfd_aarch64_elf_link_setup_gnu_properties to account | |
11486 | for the effect of GNU properties of the output_bfd. */ | |
11487 | static bfd * | |
11488 | elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info *info) | |
11489 | { | |
11490 | uint32_t prop = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop; | |
11491 | bfd *pbfd = _bfd_aarch64_elf_link_setup_gnu_properties (info, &prop); | |
11492 | elf_aarch64_tdata (info->output_bfd)->gnu_and_prop = prop; | |
11493 | elf_aarch64_tdata (info->output_bfd)->plt_type | |
11494 | |= (prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI) ? PLT_BTI : 0; | |
11495 | return pbfd; | |
11496 | } | |
11497 | ||
11498 | /* Implement elf_backend_merge_gnu_properties for AArch64. It serves as a | |
11499 | wrapper function for _bfd_aarch64_elf_merge_gnu_properties to account | |
11500 | for the effect of GNU properties of the output_bfd. */ | |
11501 | static bfd_boolean | |
11502 | elfNN_aarch64_merge_gnu_properties (struct bfd_link_info *info, | |
11503 | bfd *abfd, bfd *bbfd, | |
11504 | elf_property *aprop, | |
11505 | elf_property *bprop) | |
11506 | { | |
11507 | uint32_t prop | |
11508 | = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop; | |
11509 | ||
11510 | /* If output has been marked with BTI using command line argument, give out | |
11511 | warning if necessary. */ | |
11512 | /* Properties are merged per type, hence only check for warnings when merging | |
11513 | GNU_PROPERTY_AARCH64_FEATURE_1_AND. */ | |
11514 | if (((aprop && aprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) | |
11515 | || (bprop && bprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND)) | |
11516 | && (prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI) | |
11517 | && (!elf_aarch64_tdata (info->output_bfd)->no_bti_warn)) | |
11518 | { | |
11519 | if ((aprop && !(aprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)) | |
11520 | || !aprop) | |
11521 | { | |
11522 | _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when " | |
11523 | "all inputs do not have BTI in NOTE section."), | |
11524 | abfd); | |
11525 | } | |
11526 | if ((bprop && !(bprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)) | |
11527 | || !bprop) | |
11528 | { | |
11529 | _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when " | |
11530 | "all inputs do not have BTI in NOTE section."), | |
11531 | bbfd); | |
11532 | } | |
11533 | } | |
11534 | ||
11535 | return _bfd_aarch64_elf_merge_gnu_properties (info, abfd, aprop, | |
11536 | bprop, prop); | |
11537 | } | |
11538 | ||
11539 | /* Demangle c64 function symbols as we read them in. */ | |
11540 | ||
11541 | static bfd_boolean | |
11542 | aarch64_elfNN_swap_symbol_in (bfd * abfd, | |
11543 | const void *psrc, | |
11544 | const void *pshn, | |
11545 | Elf_Internal_Sym *dst) | |
11546 | { | |
11547 | if (!bfd_elfNN_swap_symbol_in (abfd, psrc, pshn, dst)) | |
11548 | return FALSE; | |
11549 | ||
11550 | dst->st_target_internal = 0; | |
11551 | ||
11552 | if (ELF_ST_TYPE (dst->st_info) == STT_FUNC | |
11553 | || ELF_ST_TYPE (dst->st_info) == STT_GNU_IFUNC) | |
11554 | { | |
11555 | dst->st_target_internal = dst->st_value & ST_BRANCH_TO_C64; | |
11556 | dst->st_value &= ~(bfd_vma) ST_BRANCH_TO_C64; | |
11557 | } | |
11558 | ||
11559 | return TRUE; | |
11560 | } | |
11561 | ||
11562 | ||
11563 | /* Mangle c64 function symbols as we write them out. */ | |
11564 | ||
11565 | static void | |
11566 | aarch64_elfNN_swap_symbol_out (bfd *abfd, | |
11567 | const Elf_Internal_Sym *src, | |
11568 | void *cdst, | |
11569 | void *shndx) | |
11570 | { | |
11571 | Elf_Internal_Sym newsym = *src; | |
11572 | ||
11573 | if ((ELF_ST_TYPE (newsym.st_info) == STT_FUNC | |
11574 | || ELF_ST_TYPE (newsym.st_info) == STT_GNU_IFUNC) | |
11575 | && newsym.st_shndx != SHN_UNDEF) | |
11576 | newsym.st_value |= newsym.st_target_internal; | |
11577 | ||
11578 | bfd_elfNN_swap_symbol_out (abfd, &newsym, cdst, shndx); | |
11579 | } | |
11580 | ||
11581 | /* Define the size of a GOT element for the generic mid-end. */ | |
11582 | ||
11583 | static bfd_vma | |
11584 | elfNN_aarch64_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED, | |
11585 | struct bfd_link_info *info, | |
11586 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
11587 | bfd *ibfd ATTRIBUTE_UNUSED, | |
11588 | unsigned long symndx ATTRIBUTE_UNUSED) | |
11589 | { | |
11590 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
11591 | ||
11592 | return GOT_ENTRY_SIZE (htab); | |
11593 | } | |
11594 | ||
11595 | /* Define the size of a GOT header, which is the minimum size of the GOT section | |
11596 | when one is needed. */ | |
11597 | ||
11598 | static bfd_vma | |
11599 | elfNN_aarch64_got_header_size (struct bfd_link_info *info) | |
11600 | { | |
11601 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); | |
11602 | ||
11603 | return GOT_ENTRY_SIZE (htab) * GOT_RESERVED_HEADER_SLOTS; | |
11604 | } | |
11605 | ||
11606 | /* Identify the 'C' in the CIE augmentation string. */ | |
11607 | ||
11608 | static bfd_boolean | |
11609 | elf64_aarch64_eh_frame_augmentation_char (const char aug) | |
11610 | { | |
11611 | return aug == 'C'; | |
11612 | } | |
11613 | ||
11614 | /* We use this so we can override certain functions | |
11615 | (though currently we don't). */ | |
11616 | ||
11617 | const struct elf_size_info elfNN_aarch64_size_info = | |
11618 | { | |
11619 | sizeof (ElfNN_External_Ehdr), | |
11620 | sizeof (ElfNN_External_Phdr), | |
11621 | sizeof (ElfNN_External_Shdr), | |
11622 | sizeof (ElfNN_External_Rel), | |
11623 | sizeof (ElfNN_External_Rela), | |
11624 | sizeof (ElfNN_External_Sym), | |
11625 | sizeof (ElfNN_External_Dyn), | |
11626 | sizeof (Elf_External_Note), | |
11627 | 4, /* Hash table entry size. */ | |
11628 | 1, /* Internal relocs per external relocs. */ | |
11629 | ARCH_SIZE, /* Arch size. */ | |
11630 | LOG_FILE_ALIGN, /* Log_file_align. */ | |
11631 | ELFCLASSNN, EV_CURRENT, | |
11632 | bfd_elfNN_write_out_phdrs, | |
11633 | bfd_elfNN_write_shdrs_and_ehdr, | |
11634 | bfd_elfNN_checksum_contents, | |
11635 | bfd_elfNN_write_relocs, | |
11636 | aarch64_elfNN_swap_symbol_in, | |
11637 | aarch64_elfNN_swap_symbol_out, | |
11638 | bfd_elfNN_slurp_reloc_table, | |
11639 | bfd_elfNN_slurp_symbol_table, | |
11640 | bfd_elfNN_swap_dyn_in, | |
11641 | bfd_elfNN_swap_dyn_out, | |
11642 | bfd_elfNN_swap_reloc_in, | |
11643 | bfd_elfNN_swap_reloc_out, | |
11644 | bfd_elfNN_swap_reloca_in, | |
11645 | bfd_elfNN_swap_reloca_out | |
11646 | }; | |
11647 | ||
11648 | #define ELF_ARCH bfd_arch_aarch64 | |
11649 | #define ELF_MACHINE_CODE EM_AARCH64 | |
11650 | #define ELF_MAXPAGESIZE 0x10000 | |
11651 | #define ELF_MINPAGESIZE 0x1000 | |
11652 | #define ELF_COMMONPAGESIZE 0x1000 | |
11653 | ||
11654 | #define bfd_elfNN_bfd_is_target_special_symbol \ | |
11655 | elfNN_aarch64_is_target_special_symbol | |
11656 | ||
11657 | #define bfd_elfNN_bfd_link_hash_table_create \ | |
11658 | elfNN_aarch64_link_hash_table_create | |
11659 | ||
11660 | #define bfd_elfNN_bfd_merge_private_bfd_data \ | |
11661 | elfNN_aarch64_merge_private_bfd_data | |
11662 | ||
11663 | #define bfd_elfNN_bfd_print_private_bfd_data \ | |
11664 | elfNN_aarch64_print_private_bfd_data | |
11665 | ||
11666 | #define bfd_elfNN_bfd_reloc_type_lookup \ | |
11667 | elfNN_aarch64_reloc_type_lookup | |
11668 | ||
11669 | #define bfd_elfNN_bfd_reloc_name_lookup \ | |
11670 | elfNN_aarch64_reloc_name_lookup | |
11671 | ||
11672 | #define bfd_elfNN_bfd_set_private_flags \ | |
11673 | elfNN_aarch64_set_private_flags | |
11674 | ||
11675 | #define bfd_elfNN_find_inliner_info \ | |
11676 | elfNN_aarch64_find_inliner_info | |
11677 | ||
11678 | #define bfd_elfNN_get_synthetic_symtab \ | |
11679 | elfNN_aarch64_get_synthetic_symtab | |
11680 | ||
11681 | #define bfd_elfNN_mkobject \ | |
11682 | elfNN_aarch64_mkobject | |
11683 | ||
11684 | #define bfd_elfNN_new_section_hook \ | |
11685 | elfNN_aarch64_new_section_hook | |
11686 | ||
11687 | #define elf_backend_adjust_dynamic_symbol \ | |
11688 | elfNN_aarch64_adjust_dynamic_symbol | |
11689 | ||
11690 | #define elf_backend_always_size_sections \ | |
11691 | elfNN_aarch64_always_size_sections | |
11692 | ||
11693 | #define elf_backend_check_relocs \ | |
11694 | elfNN_aarch64_check_relocs | |
11695 | ||
11696 | #define elf_backend_copy_indirect_symbol \ | |
11697 | elfNN_aarch64_copy_indirect_symbol | |
11698 | ||
11699 | #define elf_backend_merge_symbol_attribute \ | |
11700 | elfNN_aarch64_merge_symbol_attribute | |
11701 | ||
11702 | /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts | |
11703 | to them in our hash. */ | |
11704 | #define elf_backend_create_dynamic_sections \ | |
11705 | elfNN_aarch64_create_dynamic_sections | |
11706 | ||
11707 | #define elf_backend_init_index_section \ | |
11708 | _bfd_elf_init_2_index_sections | |
11709 | ||
11710 | #define elf_backend_finish_dynamic_sections \ | |
11711 | elfNN_aarch64_finish_dynamic_sections | |
11712 | ||
11713 | #define elf_backend_finish_dynamic_symbol \ | |
11714 | elfNN_aarch64_finish_dynamic_symbol | |
11715 | ||
11716 | #define elf_backend_object_p \ | |
11717 | elfNN_aarch64_object_p | |
11718 | ||
11719 | #define elf_backend_output_arch_local_syms \ | |
11720 | elfNN_aarch64_output_arch_local_syms | |
11721 | ||
11722 | #define elf_backend_maybe_function_sym \ | |
11723 | elfNN_aarch64_maybe_function_sym | |
11724 | ||
11725 | #define elf_backend_plt_sym_val \ | |
11726 | elfNN_aarch64_plt_sym_val | |
11727 | ||
11728 | #define elf_backend_init_file_header \ | |
11729 | elfNN_aarch64_init_file_header | |
11730 | ||
11731 | #define elf_backend_relocate_section \ | |
11732 | elfNN_aarch64_relocate_section | |
11733 | ||
11734 | #define elf_backend_reloc_type_class \ | |
11735 | elfNN_aarch64_reloc_type_class | |
11736 | ||
11737 | #define elf_backend_section_from_shdr \ | |
11738 | elfNN_aarch64_section_from_shdr | |
11739 | ||
11740 | #define elf_backend_size_dynamic_sections \ | |
11741 | elfNN_aarch64_size_dynamic_sections | |
11742 | ||
11743 | #define elf_backend_size_info \ | |
11744 | elfNN_aarch64_size_info | |
11745 | ||
11746 | #define elf_backend_write_section \ | |
11747 | elfNN_aarch64_write_section | |
11748 | ||
11749 | #define elf_backend_symbol_processing \ | |
11750 | elfNN_aarch64_backend_symbol_processing | |
11751 | ||
11752 | #define elf_backend_setup_gnu_properties \ | |
11753 | elfNN_aarch64_link_setup_gnu_properties | |
11754 | ||
11755 | #define elf_backend_merge_gnu_properties \ | |
11756 | elfNN_aarch64_merge_gnu_properties | |
11757 | ||
11758 | #define elf_backend_got_header_size \ | |
11759 | elfNN_aarch64_got_header_size | |
11760 | ||
11761 | #define elf_backend_got_elt_size \ | |
11762 | elfNN_aarch64_got_elt_size | |
11763 | ||
11764 | #define elf_backend_eh_frame_augmentation_char \ | |
11765 | elf64_aarch64_eh_frame_augmentation_char | |
11766 | ||
11767 | #define elf_backend_can_refcount 1 | |
11768 | #define elf_backend_can_gc_sections 1 | |
11769 | #define elf_backend_plt_readonly 1 | |
11770 | #define elf_backend_want_got_plt 1 | |
11771 | #define elf_backend_want_plt_sym 0 | |
11772 | #define elf_backend_want_dynrelro 1 | |
11773 | #define elf_backend_may_use_rel_p 0 | |
11774 | #define elf_backend_may_use_rela_p 1 | |
11775 | #define elf_backend_default_use_rela_p 1 | |
11776 | #define elf_backend_rela_normal 1 | |
11777 | #define elf_backend_dtrel_excludes_plt 1 | |
11778 | #define elf_backend_default_execstack 0 | |
11779 | #define elf_backend_extern_protected_data 1 | |
11780 | #define elf_backend_hash_symbol elf_aarch64_hash_symbol | |
11781 | ||
11782 | #undef elf_backend_obj_attrs_section | |
11783 | #define elf_backend_obj_attrs_section ".ARM.attributes" | |
11784 | ||
11785 | #include "elfNN-target.h" | |
11786 | ||
11787 | /* CloudABI support. */ | |
11788 | ||
11789 | #undef TARGET_LITTLE_SYM | |
11790 | #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec | |
11791 | #undef TARGET_LITTLE_NAME | |
11792 | #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi" | |
11793 | #undef TARGET_BIG_SYM | |
11794 | #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec | |
11795 | #undef TARGET_BIG_NAME | |
11796 | #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi" | |
11797 | ||
11798 | #undef ELF_OSABI | |
11799 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
11800 | ||
11801 | #undef elfNN_bed | |
11802 | #define elfNN_bed elfNN_aarch64_cloudabi_bed | |
11803 | ||
11804 | #include "elfNN-target.h" |