| 1 | /* ELF support for AArch64. |
| 2 | Copyright 2009, 2010, 2011, 2012 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_PAGE(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_PAGE,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_DTPMOD64 |
| 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_DTPREL64 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 | 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_PAGE,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 | elf64_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 | elf64_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 | elf64_aarch64_relocate_section () |
| 123 | |
| 124 | Calls elf64_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 | elf64_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 "bfd_stdint.h" |
| 143 | #include "elf-bfd.h" |
| 144 | #include "bfdlink.h" |
| 145 | #include "elf/aarch64.h" |
| 146 | |
| 147 | static bfd_reloc_status_type |
| 148 | bfd_elf_aarch64_put_addend (bfd *abfd, |
| 149 | bfd_byte *address, |
| 150 | reloc_howto_type *howto, bfd_signed_vma addend); |
| 151 | |
| 152 | #define IS_AARCH64_TLS_RELOC(R_TYPE) \ |
| 153 | ((R_TYPE) == R_AARCH64_TLSGD_ADR_PAGE21 \ |
| 154 | || (R_TYPE) == R_AARCH64_TLSGD_ADD_LO12_NC \ |
| 155 | || (R_TYPE) == R_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ |
| 156 | || (R_TYPE) == R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ |
| 157 | || (R_TYPE) == R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ |
| 158 | || (R_TYPE) == R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ |
| 159 | || (R_TYPE) == R_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ |
| 160 | || (R_TYPE) == R_AARCH64_TLSLE_ADD_TPREL_LO12 \ |
| 161 | || (R_TYPE) == R_AARCH64_TLSLE_ADD_TPREL_HI12 \ |
| 162 | || (R_TYPE) == R_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ |
| 163 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G2 \ |
| 164 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G1 \ |
| 165 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ |
| 166 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G0 \ |
| 167 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ |
| 168 | || (R_TYPE) == R_AARCH64_TLS_DTPMOD64 \ |
| 169 | || (R_TYPE) == R_AARCH64_TLS_DTPREL64 \ |
| 170 | || (R_TYPE) == R_AARCH64_TLS_TPREL64 \ |
| 171 | || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) |
| 172 | |
| 173 | #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ |
| 174 | ((R_TYPE) == R_AARCH64_TLSDESC_LD64_PREL19 \ |
| 175 | || (R_TYPE) == R_AARCH64_TLSDESC_ADR_PREL21 \ |
| 176 | || (R_TYPE) == R_AARCH64_TLSDESC_ADR_PAGE \ |
| 177 | || (R_TYPE) == R_AARCH64_TLSDESC_ADD_LO12_NC \ |
| 178 | || (R_TYPE) == R_AARCH64_TLSDESC_LD64_LO12_NC \ |
| 179 | || (R_TYPE) == R_AARCH64_TLSDESC_OFF_G1 \ |
| 180 | || (R_TYPE) == R_AARCH64_TLSDESC_OFF_G0_NC \ |
| 181 | || (R_TYPE) == R_AARCH64_TLSDESC_LDR \ |
| 182 | || (R_TYPE) == R_AARCH64_TLSDESC_ADD \ |
| 183 | || (R_TYPE) == R_AARCH64_TLSDESC_CALL \ |
| 184 | || (R_TYPE) == R_AARCH64_TLSDESC) |
| 185 | |
| 186 | #define ELIMINATE_COPY_RELOCS 0 |
| 187 | |
| 188 | /* Return the relocation section associated with NAME. HTAB is the |
| 189 | bfd's elf64_aarch64_link_hash_entry. */ |
| 190 | #define RELOC_SECTION(HTAB, NAME) \ |
| 191 | ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME) |
| 192 | |
| 193 | /* Return size of a relocation entry. HTAB is the bfd's |
| 194 | elf64_aarch64_link_hash_entry. */ |
| 195 | #define RELOC_SIZE(HTAB) (sizeof (Elf64_External_Rela)) |
| 196 | |
| 197 | /* Return function to swap relocations in. HTAB is the bfd's |
| 198 | elf64_aarch64_link_hash_entry. */ |
| 199 | #define SWAP_RELOC_IN(HTAB) (bfd_elf64_swap_reloca_in) |
| 200 | |
| 201 | /* Return function to swap relocations out. HTAB is the bfd's |
| 202 | elf64_aarch64_link_hash_entry. */ |
| 203 | #define SWAP_RELOC_OUT(HTAB) (bfd_elf64_swap_reloca_out) |
| 204 | |
| 205 | /* GOT Entry size - 8 bytes. */ |
| 206 | #define GOT_ENTRY_SIZE (8) |
| 207 | #define PLT_ENTRY_SIZE (32) |
| 208 | #define PLT_SMALL_ENTRY_SIZE (16) |
| 209 | #define PLT_TLSDESC_ENTRY_SIZE (32) |
| 210 | |
| 211 | /* Take the PAGE component of an address or offset. */ |
| 212 | #define PG(x) ((x) & ~ 0xfff) |
| 213 | #define PG_OFFSET(x) ((x) & 0xfff) |
| 214 | |
| 215 | /* Encoding of the nop instruction */ |
| 216 | #define INSN_NOP 0xd503201f |
| 217 | |
| 218 | #define aarch64_compute_jump_table_size(htab) \ |
| 219 | (((htab)->root.srelplt == NULL) ? 0 \ |
| 220 | : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE) |
| 221 | |
| 222 | /* The first entry in a procedure linkage table looks like this |
| 223 | if the distance between the PLTGOT and the PLT is < 4GB use |
| 224 | these PLT entries. Note that the dynamic linker gets &PLTGOT[2] |
| 225 | in x16 and needs to work out PLTGOT[1] by using an address of |
| 226 | [x16,#-8]. */ |
| 227 | static const bfd_byte elf64_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = |
| 228 | { |
| 229 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ |
| 230 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ |
| 231 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ |
| 232 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ |
| 233 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ |
| 234 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 235 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 236 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 237 | }; |
| 238 | |
| 239 | /* Per function entry in a procedure linkage table looks like this |
| 240 | if the distance between the PLTGOT and the PLT is < 4GB use |
| 241 | these PLT entries. */ |
| 242 | static const bfd_byte elf64_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = |
| 243 | { |
| 244 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ |
| 245 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ |
| 246 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ |
| 247 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ |
| 248 | }; |
| 249 | |
| 250 | static const bfd_byte |
| 251 | elf64_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = |
| 252 | { |
| 253 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ |
| 254 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ |
| 255 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ |
| 256 | 0x42, 0x08, 0x40, 0xF9, /* ldr x2, [x2, #0] */ |
| 257 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ |
| 258 | 0x40, 0x00, 0x1F, 0xD6, /* br x2 */ |
| 259 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 260 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 261 | }; |
| 262 | |
| 263 | #define elf_info_to_howto elf64_aarch64_info_to_howto |
| 264 | #define elf_info_to_howto_rel elf64_aarch64_info_to_howto |
| 265 | |
| 266 | #define AARCH64_ELF_ABI_VERSION 0 |
| 267 | #define AARCH64_ELF_OS_ABI_VERSION 0 |
| 268 | |
| 269 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 270 | #define ALL_ONES (~ (bfd_vma) 0) |
| 271 | |
| 272 | static reloc_howto_type elf64_aarch64_howto_none = |
| 273 | HOWTO (R_AARCH64_NONE, /* type */ |
| 274 | 0, /* rightshift */ |
| 275 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 276 | 0, /* bitsize */ |
| 277 | FALSE, /* pc_relative */ |
| 278 | 0, /* bitpos */ |
| 279 | complain_overflow_dont,/* complain_on_overflow */ |
| 280 | bfd_elf_generic_reloc, /* special_function */ |
| 281 | "R_AARCH64_NONE", /* name */ |
| 282 | FALSE, /* partial_inplace */ |
| 283 | 0, /* src_mask */ |
| 284 | 0, /* dst_mask */ |
| 285 | FALSE); /* pcrel_offset */ |
| 286 | |
| 287 | static reloc_howto_type elf64_aarch64_howto_dynrelocs[] = |
| 288 | { |
| 289 | HOWTO (R_AARCH64_COPY, /* type */ |
| 290 | 0, /* rightshift */ |
| 291 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 292 | 64, /* bitsize */ |
| 293 | FALSE, /* pc_relative */ |
| 294 | 0, /* bitpos */ |
| 295 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 296 | bfd_elf_generic_reloc, /* special_function */ |
| 297 | "R_AARCH64_COPY", /* name */ |
| 298 | TRUE, /* partial_inplace */ |
| 299 | 0xffffffff, /* src_mask */ |
| 300 | 0xffffffff, /* dst_mask */ |
| 301 | FALSE), /* pcrel_offset */ |
| 302 | |
| 303 | HOWTO (R_AARCH64_GLOB_DAT, /* type */ |
| 304 | 0, /* rightshift */ |
| 305 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 306 | 64, /* bitsize */ |
| 307 | FALSE, /* pc_relative */ |
| 308 | 0, /* bitpos */ |
| 309 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 310 | bfd_elf_generic_reloc, /* special_function */ |
| 311 | "R_AARCH64_GLOB_DAT", /* name */ |
| 312 | TRUE, /* partial_inplace */ |
| 313 | 0xffffffff, /* src_mask */ |
| 314 | 0xffffffff, /* dst_mask */ |
| 315 | FALSE), /* pcrel_offset */ |
| 316 | |
| 317 | HOWTO (R_AARCH64_JUMP_SLOT, /* type */ |
| 318 | 0, /* rightshift */ |
| 319 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 320 | 64, /* bitsize */ |
| 321 | FALSE, /* pc_relative */ |
| 322 | 0, /* bitpos */ |
| 323 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 324 | bfd_elf_generic_reloc, /* special_function */ |
| 325 | "R_AARCH64_JUMP_SLOT", /* name */ |
| 326 | TRUE, /* partial_inplace */ |
| 327 | 0xffffffff, /* src_mask */ |
| 328 | 0xffffffff, /* dst_mask */ |
| 329 | FALSE), /* pcrel_offset */ |
| 330 | |
| 331 | HOWTO (R_AARCH64_RELATIVE, /* type */ |
| 332 | 0, /* rightshift */ |
| 333 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 334 | 64, /* bitsize */ |
| 335 | FALSE, /* pc_relative */ |
| 336 | 0, /* bitpos */ |
| 337 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 338 | bfd_elf_generic_reloc, /* special_function */ |
| 339 | "R_AARCH64_RELATIVE", /* name */ |
| 340 | TRUE, /* partial_inplace */ |
| 341 | ALL_ONES, /* src_mask */ |
| 342 | ALL_ONES, /* dst_mask */ |
| 343 | FALSE), /* pcrel_offset */ |
| 344 | |
| 345 | HOWTO (R_AARCH64_TLS_DTPMOD64, /* type */ |
| 346 | 0, /* rightshift */ |
| 347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 348 | 64, /* bitsize */ |
| 349 | FALSE, /* pc_relative */ |
| 350 | 0, /* bitpos */ |
| 351 | complain_overflow_dont, /* complain_on_overflow */ |
| 352 | bfd_elf_generic_reloc, /* special_function */ |
| 353 | "R_AARCH64_TLS_DTPMOD64", /* name */ |
| 354 | FALSE, /* partial_inplace */ |
| 355 | 0, /* src_mask */ |
| 356 | ALL_ONES, /* dst_mask */ |
| 357 | FALSE), /* pc_reloffset */ |
| 358 | |
| 359 | HOWTO (R_AARCH64_TLS_DTPREL64, /* type */ |
| 360 | 0, /* rightshift */ |
| 361 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 362 | 64, /* bitsize */ |
| 363 | FALSE, /* pc_relative */ |
| 364 | 0, /* bitpos */ |
| 365 | complain_overflow_dont, /* complain_on_overflow */ |
| 366 | bfd_elf_generic_reloc, /* special_function */ |
| 367 | "R_AARCH64_TLS_DTPREL64", /* name */ |
| 368 | FALSE, /* partial_inplace */ |
| 369 | 0, /* src_mask */ |
| 370 | ALL_ONES, /* dst_mask */ |
| 371 | FALSE), /* pcrel_offset */ |
| 372 | |
| 373 | HOWTO (R_AARCH64_TLS_TPREL64, /* type */ |
| 374 | 0, /* rightshift */ |
| 375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 376 | 64, /* bitsize */ |
| 377 | FALSE, /* pc_relative */ |
| 378 | 0, /* bitpos */ |
| 379 | complain_overflow_dont, /* complain_on_overflow */ |
| 380 | bfd_elf_generic_reloc, /* special_function */ |
| 381 | "R_AARCH64_TLS_TPREL64", /* name */ |
| 382 | FALSE, /* partial_inplace */ |
| 383 | 0, /* src_mask */ |
| 384 | ALL_ONES, /* dst_mask */ |
| 385 | FALSE), /* pcrel_offset */ |
| 386 | |
| 387 | HOWTO (R_AARCH64_TLSDESC, /* type */ |
| 388 | 0, /* rightshift */ |
| 389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 390 | 64, /* bitsize */ |
| 391 | FALSE, /* pc_relative */ |
| 392 | 0, /* bitpos */ |
| 393 | complain_overflow_dont, /* complain_on_overflow */ |
| 394 | bfd_elf_generic_reloc, /* special_function */ |
| 395 | "R_AARCH64_TLSDESC", /* name */ |
| 396 | FALSE, /* partial_inplace */ |
| 397 | 0, /* src_mask */ |
| 398 | ALL_ONES, /* dst_mask */ |
| 399 | FALSE), /* pcrel_offset */ |
| 400 | |
| 401 | }; |
| 402 | |
| 403 | /* Note: code such as elf64_aarch64_reloc_type_lookup expect to use e.g. |
| 404 | R_AARCH64_PREL64 as an index into this, and find the R_AARCH64_PREL64 HOWTO |
| 405 | in that slot. */ |
| 406 | |
| 407 | static reloc_howto_type elf64_aarch64_howto_table[] = |
| 408 | { |
| 409 | /* Basic data relocations. */ |
| 410 | |
| 411 | HOWTO (R_AARCH64_NULL, /* type */ |
| 412 | 0, /* rightshift */ |
| 413 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 414 | 0, /* bitsize */ |
| 415 | FALSE, /* pc_relative */ |
| 416 | 0, /* bitpos */ |
| 417 | complain_overflow_dont, /* complain_on_overflow */ |
| 418 | bfd_elf_generic_reloc, /* special_function */ |
| 419 | "R_AARCH64_NULL", /* name */ |
| 420 | FALSE, /* partial_inplace */ |
| 421 | 0, /* src_mask */ |
| 422 | 0, /* dst_mask */ |
| 423 | FALSE), /* pcrel_offset */ |
| 424 | |
| 425 | /* .xword: (S+A) */ |
| 426 | HOWTO (R_AARCH64_ABS64, /* type */ |
| 427 | 0, /* rightshift */ |
| 428 | 4, /* size (4 = long long) */ |
| 429 | 64, /* bitsize */ |
| 430 | FALSE, /* pc_relative */ |
| 431 | 0, /* bitpos */ |
| 432 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 433 | bfd_elf_generic_reloc, /* special_function */ |
| 434 | "R_AARCH64_ABS64", /* name */ |
| 435 | FALSE, /* partial_inplace */ |
| 436 | ALL_ONES, /* src_mask */ |
| 437 | ALL_ONES, /* dst_mask */ |
| 438 | FALSE), /* pcrel_offset */ |
| 439 | |
| 440 | /* .word: (S+A) */ |
| 441 | HOWTO (R_AARCH64_ABS32, /* type */ |
| 442 | 0, /* rightshift */ |
| 443 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 444 | 32, /* bitsize */ |
| 445 | FALSE, /* pc_relative */ |
| 446 | 0, /* bitpos */ |
| 447 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 448 | bfd_elf_generic_reloc, /* special_function */ |
| 449 | "R_AARCH64_ABS32", /* name */ |
| 450 | FALSE, /* partial_inplace */ |
| 451 | 0xffffffff, /* src_mask */ |
| 452 | 0xffffffff, /* dst_mask */ |
| 453 | FALSE), /* pcrel_offset */ |
| 454 | |
| 455 | /* .half: (S+A) */ |
| 456 | HOWTO (R_AARCH64_ABS16, /* type */ |
| 457 | 0, /* rightshift */ |
| 458 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 459 | 16, /* bitsize */ |
| 460 | FALSE, /* pc_relative */ |
| 461 | 0, /* bitpos */ |
| 462 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 463 | bfd_elf_generic_reloc, /* special_function */ |
| 464 | "R_AARCH64_ABS16", /* name */ |
| 465 | FALSE, /* partial_inplace */ |
| 466 | 0xffff, /* src_mask */ |
| 467 | 0xffff, /* dst_mask */ |
| 468 | FALSE), /* pcrel_offset */ |
| 469 | |
| 470 | /* .xword: (S+A-P) */ |
| 471 | HOWTO (R_AARCH64_PREL64, /* type */ |
| 472 | 0, /* rightshift */ |
| 473 | 4, /* size (4 = long long) */ |
| 474 | 64, /* bitsize */ |
| 475 | TRUE, /* pc_relative */ |
| 476 | 0, /* bitpos */ |
| 477 | complain_overflow_signed, /* complain_on_overflow */ |
| 478 | bfd_elf_generic_reloc, /* special_function */ |
| 479 | "R_AARCH64_PREL64", /* name */ |
| 480 | FALSE, /* partial_inplace */ |
| 481 | ALL_ONES, /* src_mask */ |
| 482 | ALL_ONES, /* dst_mask */ |
| 483 | TRUE), /* pcrel_offset */ |
| 484 | |
| 485 | /* .word: (S+A-P) */ |
| 486 | HOWTO (R_AARCH64_PREL32, /* type */ |
| 487 | 0, /* rightshift */ |
| 488 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 489 | 32, /* bitsize */ |
| 490 | TRUE, /* pc_relative */ |
| 491 | 0, /* bitpos */ |
| 492 | complain_overflow_signed, /* complain_on_overflow */ |
| 493 | bfd_elf_generic_reloc, /* special_function */ |
| 494 | "R_AARCH64_PREL32", /* name */ |
| 495 | FALSE, /* partial_inplace */ |
| 496 | 0xffffffff, /* src_mask */ |
| 497 | 0xffffffff, /* dst_mask */ |
| 498 | TRUE), /* pcrel_offset */ |
| 499 | |
| 500 | /* .half: (S+A-P) */ |
| 501 | HOWTO (R_AARCH64_PREL16, /* type */ |
| 502 | 0, /* rightshift */ |
| 503 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 504 | 16, /* bitsize */ |
| 505 | TRUE, /* pc_relative */ |
| 506 | 0, /* bitpos */ |
| 507 | complain_overflow_signed, /* complain_on_overflow */ |
| 508 | bfd_elf_generic_reloc, /* special_function */ |
| 509 | "R_AARCH64_PREL16", /* name */ |
| 510 | FALSE, /* partial_inplace */ |
| 511 | 0xffff, /* src_mask */ |
| 512 | 0xffff, /* dst_mask */ |
| 513 | TRUE), /* pcrel_offset */ |
| 514 | |
| 515 | /* Group relocations to create a 16, 32, 48 or 64 bit |
| 516 | unsigned data or abs address inline. */ |
| 517 | |
| 518 | /* MOVZ: ((S+A) >> 0) & 0xffff */ |
| 519 | HOWTO (R_AARCH64_MOVW_UABS_G0, /* type */ |
| 520 | 0, /* rightshift */ |
| 521 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 522 | 16, /* bitsize */ |
| 523 | FALSE, /* pc_relative */ |
| 524 | 0, /* bitpos */ |
| 525 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 526 | bfd_elf_generic_reloc, /* special_function */ |
| 527 | "R_AARCH64_MOVW_UABS_G0", /* name */ |
| 528 | FALSE, /* partial_inplace */ |
| 529 | 0xffff, /* src_mask */ |
| 530 | 0xffff, /* dst_mask */ |
| 531 | FALSE), /* pcrel_offset */ |
| 532 | |
| 533 | /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ |
| 534 | HOWTO (R_AARCH64_MOVW_UABS_G0_NC, /* type */ |
| 535 | 0, /* rightshift */ |
| 536 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 537 | 16, /* bitsize */ |
| 538 | FALSE, /* pc_relative */ |
| 539 | 0, /* bitpos */ |
| 540 | complain_overflow_dont, /* complain_on_overflow */ |
| 541 | bfd_elf_generic_reloc, /* special_function */ |
| 542 | "R_AARCH64_MOVW_UABS_G0_NC", /* name */ |
| 543 | FALSE, /* partial_inplace */ |
| 544 | 0xffff, /* src_mask */ |
| 545 | 0xffff, /* dst_mask */ |
| 546 | FALSE), /* pcrel_offset */ |
| 547 | |
| 548 | /* MOVZ: ((S+A) >> 16) & 0xffff */ |
| 549 | HOWTO (R_AARCH64_MOVW_UABS_G1, /* type */ |
| 550 | 16, /* rightshift */ |
| 551 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 552 | 16, /* bitsize */ |
| 553 | FALSE, /* pc_relative */ |
| 554 | 0, /* bitpos */ |
| 555 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 556 | bfd_elf_generic_reloc, /* special_function */ |
| 557 | "R_AARCH64_MOVW_UABS_G1", /* name */ |
| 558 | FALSE, /* partial_inplace */ |
| 559 | 0xffff, /* src_mask */ |
| 560 | 0xffff, /* dst_mask */ |
| 561 | FALSE), /* pcrel_offset */ |
| 562 | |
| 563 | /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ |
| 564 | HOWTO (R_AARCH64_MOVW_UABS_G1_NC, /* type */ |
| 565 | 16, /* rightshift */ |
| 566 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 567 | 16, /* bitsize */ |
| 568 | FALSE, /* pc_relative */ |
| 569 | 0, /* bitpos */ |
| 570 | complain_overflow_dont, /* complain_on_overflow */ |
| 571 | bfd_elf_generic_reloc, /* special_function */ |
| 572 | "R_AARCH64_MOVW_UABS_G1_NC", /* name */ |
| 573 | FALSE, /* partial_inplace */ |
| 574 | 0xffff, /* src_mask */ |
| 575 | 0xffff, /* dst_mask */ |
| 576 | FALSE), /* pcrel_offset */ |
| 577 | |
| 578 | /* MOVZ: ((S+A) >> 32) & 0xffff */ |
| 579 | HOWTO (R_AARCH64_MOVW_UABS_G2, /* type */ |
| 580 | 32, /* rightshift */ |
| 581 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 582 | 16, /* bitsize */ |
| 583 | FALSE, /* pc_relative */ |
| 584 | 0, /* bitpos */ |
| 585 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 586 | bfd_elf_generic_reloc, /* special_function */ |
| 587 | "R_AARCH64_MOVW_UABS_G2", /* name */ |
| 588 | FALSE, /* partial_inplace */ |
| 589 | 0xffff, /* src_mask */ |
| 590 | 0xffff, /* dst_mask */ |
| 591 | FALSE), /* pcrel_offset */ |
| 592 | |
| 593 | /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ |
| 594 | HOWTO (R_AARCH64_MOVW_UABS_G2_NC, /* type */ |
| 595 | 32, /* rightshift */ |
| 596 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 597 | 16, /* bitsize */ |
| 598 | FALSE, /* pc_relative */ |
| 599 | 0, /* bitpos */ |
| 600 | complain_overflow_dont, /* complain_on_overflow */ |
| 601 | bfd_elf_generic_reloc, /* special_function */ |
| 602 | "R_AARCH64_MOVW_UABS_G2_NC", /* name */ |
| 603 | FALSE, /* partial_inplace */ |
| 604 | 0xffff, /* src_mask */ |
| 605 | 0xffff, /* dst_mask */ |
| 606 | FALSE), /* pcrel_offset */ |
| 607 | |
| 608 | /* MOVZ: ((S+A) >> 48) & 0xffff */ |
| 609 | HOWTO (R_AARCH64_MOVW_UABS_G3, /* type */ |
| 610 | 48, /* 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 | "R_AARCH64_MOVW_UABS_G3", /* name */ |
| 618 | FALSE, /* partial_inplace */ |
| 619 | 0xffff, /* src_mask */ |
| 620 | 0xffff, /* dst_mask */ |
| 621 | FALSE), /* pcrel_offset */ |
| 622 | |
| 623 | /* Group relocations to create high part of a 16, 32, 48 or 64 bit |
| 624 | signed data or abs address inline. Will change instruction |
| 625 | to MOVN or MOVZ depending on sign of calculated value. */ |
| 626 | |
| 627 | /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ |
| 628 | HOWTO (R_AARCH64_MOVW_SABS_G0, /* type */ |
| 629 | 0, /* rightshift */ |
| 630 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 631 | 16, /* bitsize */ |
| 632 | FALSE, /* pc_relative */ |
| 633 | 0, /* bitpos */ |
| 634 | complain_overflow_signed, /* complain_on_overflow */ |
| 635 | bfd_elf_generic_reloc, /* special_function */ |
| 636 | "R_AARCH64_MOVW_SABS_G0", /* name */ |
| 637 | FALSE, /* partial_inplace */ |
| 638 | 0xffff, /* src_mask */ |
| 639 | 0xffff, /* dst_mask */ |
| 640 | FALSE), /* pcrel_offset */ |
| 641 | |
| 642 | /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ |
| 643 | HOWTO (R_AARCH64_MOVW_SABS_G1, /* type */ |
| 644 | 16, /* rightshift */ |
| 645 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 646 | 16, /* bitsize */ |
| 647 | FALSE, /* pc_relative */ |
| 648 | 0, /* bitpos */ |
| 649 | complain_overflow_signed, /* complain_on_overflow */ |
| 650 | bfd_elf_generic_reloc, /* special_function */ |
| 651 | "R_AARCH64_MOVW_SABS_G1", /* name */ |
| 652 | FALSE, /* partial_inplace */ |
| 653 | 0xffff, /* src_mask */ |
| 654 | 0xffff, /* dst_mask */ |
| 655 | FALSE), /* pcrel_offset */ |
| 656 | |
| 657 | /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ |
| 658 | HOWTO (R_AARCH64_MOVW_SABS_G2, /* type */ |
| 659 | 32, /* rightshift */ |
| 660 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 661 | 16, /* bitsize */ |
| 662 | FALSE, /* pc_relative */ |
| 663 | 0, /* bitpos */ |
| 664 | complain_overflow_signed, /* complain_on_overflow */ |
| 665 | bfd_elf_generic_reloc, /* special_function */ |
| 666 | "R_AARCH64_MOVW_SABS_G2", /* name */ |
| 667 | FALSE, /* partial_inplace */ |
| 668 | 0xffff, /* src_mask */ |
| 669 | 0xffff, /* dst_mask */ |
| 670 | FALSE), /* pcrel_offset */ |
| 671 | |
| 672 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store |
| 673 | addresses: PG(x) is (x & ~0xfff). */ |
| 674 | |
| 675 | /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ |
| 676 | HOWTO (R_AARCH64_LD_PREL_LO19, /* type */ |
| 677 | 2, /* rightshift */ |
| 678 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 679 | 19, /* bitsize */ |
| 680 | TRUE, /* pc_relative */ |
| 681 | 0, /* bitpos */ |
| 682 | complain_overflow_signed, /* complain_on_overflow */ |
| 683 | bfd_elf_generic_reloc, /* special_function */ |
| 684 | "R_AARCH64_LD_PREL_LO19", /* name */ |
| 685 | FALSE, /* partial_inplace */ |
| 686 | 0x7ffff, /* src_mask */ |
| 687 | 0x7ffff, /* dst_mask */ |
| 688 | TRUE), /* pcrel_offset */ |
| 689 | |
| 690 | /* ADR: (S+A-P) & 0x1fffff */ |
| 691 | HOWTO (R_AARCH64_ADR_PREL_LO21, /* type */ |
| 692 | 0, /* rightshift */ |
| 693 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 694 | 21, /* bitsize */ |
| 695 | TRUE, /* pc_relative */ |
| 696 | 0, /* bitpos */ |
| 697 | complain_overflow_signed, /* complain_on_overflow */ |
| 698 | bfd_elf_generic_reloc, /* special_function */ |
| 699 | "R_AARCH64_ADR_PREL_LO21", /* name */ |
| 700 | FALSE, /* partial_inplace */ |
| 701 | 0x1fffff, /* src_mask */ |
| 702 | 0x1fffff, /* dst_mask */ |
| 703 | TRUE), /* pcrel_offset */ |
| 704 | |
| 705 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 706 | HOWTO (R_AARCH64_ADR_PREL_PG_HI21, /* type */ |
| 707 | 12, /* rightshift */ |
| 708 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 709 | 21, /* bitsize */ |
| 710 | TRUE, /* pc_relative */ |
| 711 | 0, /* bitpos */ |
| 712 | complain_overflow_signed, /* complain_on_overflow */ |
| 713 | bfd_elf_generic_reloc, /* special_function */ |
| 714 | "R_AARCH64_ADR_PREL_PG_HI21", /* name */ |
| 715 | FALSE, /* partial_inplace */ |
| 716 | 0x1fffff, /* src_mask */ |
| 717 | 0x1fffff, /* dst_mask */ |
| 718 | TRUE), /* pcrel_offset */ |
| 719 | |
| 720 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ |
| 721 | HOWTO (R_AARCH64_ADR_PREL_PG_HI21_NC, /* type */ |
| 722 | 12, /* rightshift */ |
| 723 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 724 | 21, /* bitsize */ |
| 725 | TRUE, /* pc_relative */ |
| 726 | 0, /* bitpos */ |
| 727 | complain_overflow_dont, /* complain_on_overflow */ |
| 728 | bfd_elf_generic_reloc, /* special_function */ |
| 729 | "R_AARCH64_ADR_PREL_PG_HI21_NC", /* name */ |
| 730 | FALSE, /* partial_inplace */ |
| 731 | 0x1fffff, /* src_mask */ |
| 732 | 0x1fffff, /* dst_mask */ |
| 733 | TRUE), /* pcrel_offset */ |
| 734 | |
| 735 | /* ADD: (S+A) & 0xfff [no overflow check] */ |
| 736 | HOWTO (R_AARCH64_ADD_ABS_LO12_NC, /* type */ |
| 737 | 0, /* rightshift */ |
| 738 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 739 | 12, /* bitsize */ |
| 740 | FALSE, /* pc_relative */ |
| 741 | 10, /* bitpos */ |
| 742 | complain_overflow_dont, /* complain_on_overflow */ |
| 743 | bfd_elf_generic_reloc, /* special_function */ |
| 744 | "R_AARCH64_ADD_ABS_LO12_NC", /* name */ |
| 745 | FALSE, /* partial_inplace */ |
| 746 | 0x3ffc00, /* src_mask */ |
| 747 | 0x3ffc00, /* dst_mask */ |
| 748 | FALSE), /* pcrel_offset */ |
| 749 | |
| 750 | /* LD/ST8: (S+A) & 0xfff */ |
| 751 | HOWTO (R_AARCH64_LDST8_ABS_LO12_NC, /* type */ |
| 752 | 0, /* rightshift */ |
| 753 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 754 | 12, /* bitsize */ |
| 755 | FALSE, /* pc_relative */ |
| 756 | 0, /* bitpos */ |
| 757 | complain_overflow_dont, /* complain_on_overflow */ |
| 758 | bfd_elf_generic_reloc, /* special_function */ |
| 759 | "R_AARCH64_LDST8_ABS_LO12_NC", /* name */ |
| 760 | FALSE, /* partial_inplace */ |
| 761 | 0xfff, /* src_mask */ |
| 762 | 0xfff, /* dst_mask */ |
| 763 | FALSE), /* pcrel_offset */ |
| 764 | |
| 765 | /* Relocations for control-flow instructions. */ |
| 766 | |
| 767 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ |
| 768 | HOWTO (R_AARCH64_TSTBR14, /* type */ |
| 769 | 2, /* rightshift */ |
| 770 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 771 | 14, /* bitsize */ |
| 772 | TRUE, /* pc_relative */ |
| 773 | 0, /* bitpos */ |
| 774 | complain_overflow_signed, /* complain_on_overflow */ |
| 775 | bfd_elf_generic_reloc, /* special_function */ |
| 776 | "R_AARCH64_TSTBR14", /* name */ |
| 777 | FALSE, /* partial_inplace */ |
| 778 | 0x3fff, /* src_mask */ |
| 779 | 0x3fff, /* dst_mask */ |
| 780 | TRUE), /* pcrel_offset */ |
| 781 | |
| 782 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ |
| 783 | HOWTO (R_AARCH64_CONDBR19, /* type */ |
| 784 | 2, /* rightshift */ |
| 785 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 786 | 19, /* bitsize */ |
| 787 | TRUE, /* pc_relative */ |
| 788 | 0, /* bitpos */ |
| 789 | complain_overflow_signed, /* complain_on_overflow */ |
| 790 | bfd_elf_generic_reloc, /* special_function */ |
| 791 | "R_AARCH64_CONDBR19", /* name */ |
| 792 | FALSE, /* partial_inplace */ |
| 793 | 0x7ffff, /* src_mask */ |
| 794 | 0x7ffff, /* dst_mask */ |
| 795 | TRUE), /* pcrel_offset */ |
| 796 | |
| 797 | EMPTY_HOWTO (281), |
| 798 | |
| 799 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ |
| 800 | HOWTO (R_AARCH64_JUMP26, /* type */ |
| 801 | 2, /* rightshift */ |
| 802 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 803 | 26, /* bitsize */ |
| 804 | TRUE, /* pc_relative */ |
| 805 | 0, /* bitpos */ |
| 806 | complain_overflow_signed, /* complain_on_overflow */ |
| 807 | bfd_elf_generic_reloc, /* special_function */ |
| 808 | "R_AARCH64_JUMP26", /* name */ |
| 809 | FALSE, /* partial_inplace */ |
| 810 | 0x3ffffff, /* src_mask */ |
| 811 | 0x3ffffff, /* dst_mask */ |
| 812 | TRUE), /* pcrel_offset */ |
| 813 | |
| 814 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ |
| 815 | HOWTO (R_AARCH64_CALL26, /* type */ |
| 816 | 2, /* rightshift */ |
| 817 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 818 | 26, /* bitsize */ |
| 819 | TRUE, /* pc_relative */ |
| 820 | 0, /* bitpos */ |
| 821 | complain_overflow_signed, /* complain_on_overflow */ |
| 822 | bfd_elf_generic_reloc, /* special_function */ |
| 823 | "R_AARCH64_CALL26", /* name */ |
| 824 | FALSE, /* partial_inplace */ |
| 825 | 0x3ffffff, /* src_mask */ |
| 826 | 0x3ffffff, /* dst_mask */ |
| 827 | TRUE), /* pcrel_offset */ |
| 828 | |
| 829 | /* LD/ST16: (S+A) & 0xffe */ |
| 830 | HOWTO (R_AARCH64_LDST16_ABS_LO12_NC, /* type */ |
| 831 | 1, /* rightshift */ |
| 832 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 833 | 12, /* bitsize */ |
| 834 | FALSE, /* pc_relative */ |
| 835 | 0, /* bitpos */ |
| 836 | complain_overflow_dont, /* complain_on_overflow */ |
| 837 | bfd_elf_generic_reloc, /* special_function */ |
| 838 | "R_AARCH64_LDST16_ABS_LO12_NC", /* name */ |
| 839 | FALSE, /* partial_inplace */ |
| 840 | 0xffe, /* src_mask */ |
| 841 | 0xffe, /* dst_mask */ |
| 842 | FALSE), /* pcrel_offset */ |
| 843 | |
| 844 | /* LD/ST32: (S+A) & 0xffc */ |
| 845 | HOWTO (R_AARCH64_LDST32_ABS_LO12_NC, /* type */ |
| 846 | 2, /* rightshift */ |
| 847 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 848 | 12, /* bitsize */ |
| 849 | FALSE, /* pc_relative */ |
| 850 | 0, /* bitpos */ |
| 851 | complain_overflow_dont, /* complain_on_overflow */ |
| 852 | bfd_elf_generic_reloc, /* special_function */ |
| 853 | "R_AARCH64_LDST32_ABS_LO12_NC", /* name */ |
| 854 | FALSE, /* partial_inplace */ |
| 855 | 0xffc, /* src_mask */ |
| 856 | 0xffc, /* dst_mask */ |
| 857 | FALSE), /* pcrel_offset */ |
| 858 | |
| 859 | /* LD/ST64: (S+A) & 0xff8 */ |
| 860 | HOWTO (R_AARCH64_LDST64_ABS_LO12_NC, /* type */ |
| 861 | 3, /* rightshift */ |
| 862 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 863 | 12, /* bitsize */ |
| 864 | FALSE, /* pc_relative */ |
| 865 | 0, /* bitpos */ |
| 866 | complain_overflow_dont, /* complain_on_overflow */ |
| 867 | bfd_elf_generic_reloc, /* special_function */ |
| 868 | "R_AARCH64_LDST64_ABS_LO12_NC", /* name */ |
| 869 | FALSE, /* partial_inplace */ |
| 870 | 0xff8, /* src_mask */ |
| 871 | 0xff8, /* dst_mask */ |
| 872 | FALSE), /* pcrel_offset */ |
| 873 | |
| 874 | EMPTY_HOWTO (287), |
| 875 | EMPTY_HOWTO (288), |
| 876 | EMPTY_HOWTO (289), |
| 877 | EMPTY_HOWTO (290), |
| 878 | EMPTY_HOWTO (291), |
| 879 | EMPTY_HOWTO (292), |
| 880 | EMPTY_HOWTO (293), |
| 881 | EMPTY_HOWTO (294), |
| 882 | EMPTY_HOWTO (295), |
| 883 | EMPTY_HOWTO (296), |
| 884 | EMPTY_HOWTO (297), |
| 885 | EMPTY_HOWTO (298), |
| 886 | |
| 887 | /* LD/ST128: (S+A) & 0xff0 */ |
| 888 | HOWTO (R_AARCH64_LDST128_ABS_LO12_NC, /* type */ |
| 889 | 4, /* rightshift */ |
| 890 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 891 | 12, /* bitsize */ |
| 892 | FALSE, /* pc_relative */ |
| 893 | 0, /* bitpos */ |
| 894 | complain_overflow_dont, /* complain_on_overflow */ |
| 895 | bfd_elf_generic_reloc, /* special_function */ |
| 896 | "R_AARCH64_LDST128_ABS_LO12_NC", /* name */ |
| 897 | FALSE, /* partial_inplace */ |
| 898 | 0xff0, /* src_mask */ |
| 899 | 0xff0, /* dst_mask */ |
| 900 | FALSE), /* pcrel_offset */ |
| 901 | |
| 902 | EMPTY_HOWTO (300), |
| 903 | EMPTY_HOWTO (301), |
| 904 | EMPTY_HOWTO (302), |
| 905 | EMPTY_HOWTO (303), |
| 906 | EMPTY_HOWTO (304), |
| 907 | EMPTY_HOWTO (305), |
| 908 | EMPTY_HOWTO (306), |
| 909 | EMPTY_HOWTO (307), |
| 910 | EMPTY_HOWTO (308), |
| 911 | |
| 912 | /* Set a load-literal immediate field to bits |
| 913 | 0x1FFFFC of G(S)-P */ |
| 914 | HOWTO (R_AARCH64_GOT_LD_PREL19, /* type */ |
| 915 | 2, /* rightshift */ |
| 916 | 2, /* size (0 = byte,1 = short,2 = long) */ |
| 917 | 19, /* bitsize */ |
| 918 | TRUE, /* pc_relative */ |
| 919 | 0, /* bitpos */ |
| 920 | complain_overflow_signed, /* complain_on_overflow */ |
| 921 | bfd_elf_generic_reloc, /* special_function */ |
| 922 | "R_AARCH64_GOT_LD_PREL19", /* name */ |
| 923 | FALSE, /* partial_inplace */ |
| 924 | 0xffffe0, /* src_mask */ |
| 925 | 0xffffe0, /* dst_mask */ |
| 926 | TRUE), /* pcrel_offset */ |
| 927 | |
| 928 | EMPTY_HOWTO (310), |
| 929 | |
| 930 | /* Get to the page for the GOT entry for the symbol |
| 931 | (G(S) - P) using an ADRP instruction. */ |
| 932 | HOWTO (R_AARCH64_ADR_GOT_PAGE, /* type */ |
| 933 | 12, /* rightshift */ |
| 934 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 935 | 21, /* bitsize */ |
| 936 | TRUE, /* pc_relative */ |
| 937 | 0, /* bitpos */ |
| 938 | complain_overflow_dont, /* complain_on_overflow */ |
| 939 | bfd_elf_generic_reloc, /* special_function */ |
| 940 | "R_AARCH64_ADR_GOT_PAGE", /* name */ |
| 941 | FALSE, /* partial_inplace */ |
| 942 | 0x1fffff, /* src_mask */ |
| 943 | 0x1fffff, /* dst_mask */ |
| 944 | TRUE), /* pcrel_offset */ |
| 945 | |
| 946 | /* LD64: GOT offset G(S) & 0xff8 */ |
| 947 | HOWTO (R_AARCH64_LD64_GOT_LO12_NC, /* type */ |
| 948 | 3, /* rightshift */ |
| 949 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 950 | 12, /* bitsize */ |
| 951 | FALSE, /* pc_relative */ |
| 952 | 0, /* bitpos */ |
| 953 | complain_overflow_dont, /* complain_on_overflow */ |
| 954 | bfd_elf_generic_reloc, /* special_function */ |
| 955 | "R_AARCH64_LD64_GOT_LO12_NC", /* name */ |
| 956 | FALSE, /* partial_inplace */ |
| 957 | 0xff8, /* src_mask */ |
| 958 | 0xff8, /* dst_mask */ |
| 959 | FALSE) /* pcrel_offset */ |
| 960 | }; |
| 961 | |
| 962 | static reloc_howto_type elf64_aarch64_tls_howto_table[] = |
| 963 | { |
| 964 | EMPTY_HOWTO (512), |
| 965 | |
| 966 | /* Get to the page for the GOT entry for the symbol |
| 967 | (G(S) - P) using an ADRP instruction. */ |
| 968 | HOWTO (R_AARCH64_TLSGD_ADR_PAGE21, /* type */ |
| 969 | 12, /* rightshift */ |
| 970 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 971 | 21, /* bitsize */ |
| 972 | TRUE, /* pc_relative */ |
| 973 | 0, /* bitpos */ |
| 974 | complain_overflow_dont, /* complain_on_overflow */ |
| 975 | bfd_elf_generic_reloc, /* special_function */ |
| 976 | "R_AARCH64_TLSGD_ADR_PAGE21", /* name */ |
| 977 | FALSE, /* partial_inplace */ |
| 978 | 0x1fffff, /* src_mask */ |
| 979 | 0x1fffff, /* dst_mask */ |
| 980 | TRUE), /* pcrel_offset */ |
| 981 | |
| 982 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ |
| 983 | HOWTO (R_AARCH64_TLSGD_ADD_LO12_NC, /* type */ |
| 984 | 0, /* rightshift */ |
| 985 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 986 | 12, /* bitsize */ |
| 987 | FALSE, /* pc_relative */ |
| 988 | 0, /* bitpos */ |
| 989 | complain_overflow_dont, /* complain_on_overflow */ |
| 990 | bfd_elf_generic_reloc, /* special_function */ |
| 991 | "R_AARCH64_TLSGD_ADD_LO12_NC", /* name */ |
| 992 | FALSE, /* partial_inplace */ |
| 993 | 0xfff, /* src_mask */ |
| 994 | 0xfff, /* dst_mask */ |
| 995 | FALSE), /* pcrel_offset */ |
| 996 | |
| 997 | EMPTY_HOWTO (515), |
| 998 | EMPTY_HOWTO (516), |
| 999 | EMPTY_HOWTO (517), |
| 1000 | EMPTY_HOWTO (518), |
| 1001 | EMPTY_HOWTO (519), |
| 1002 | EMPTY_HOWTO (520), |
| 1003 | EMPTY_HOWTO (521), |
| 1004 | EMPTY_HOWTO (522), |
| 1005 | EMPTY_HOWTO (523), |
| 1006 | EMPTY_HOWTO (524), |
| 1007 | EMPTY_HOWTO (525), |
| 1008 | EMPTY_HOWTO (526), |
| 1009 | EMPTY_HOWTO (527), |
| 1010 | EMPTY_HOWTO (528), |
| 1011 | EMPTY_HOWTO (529), |
| 1012 | EMPTY_HOWTO (530), |
| 1013 | EMPTY_HOWTO (531), |
| 1014 | EMPTY_HOWTO (532), |
| 1015 | EMPTY_HOWTO (533), |
| 1016 | EMPTY_HOWTO (534), |
| 1017 | EMPTY_HOWTO (535), |
| 1018 | EMPTY_HOWTO (536), |
| 1019 | EMPTY_HOWTO (537), |
| 1020 | EMPTY_HOWTO (538), |
| 1021 | |
| 1022 | HOWTO (R_AARCH64_TLSIE_MOVW_GOTTPREL_G1, /* type */ |
| 1023 | 16, /* rightshift */ |
| 1024 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1025 | 16, /* bitsize */ |
| 1026 | FALSE, /* pc_relative */ |
| 1027 | 0, /* bitpos */ |
| 1028 | complain_overflow_dont, /* complain_on_overflow */ |
| 1029 | bfd_elf_generic_reloc, /* special_function */ |
| 1030 | "R_AARCH64_TLSIE_MOVW_GOTTPREL_G1", /* name */ |
| 1031 | FALSE, /* partial_inplace */ |
| 1032 | 0xffff, /* src_mask */ |
| 1033 | 0xffff, /* dst_mask */ |
| 1034 | FALSE), /* pcrel_offset */ |
| 1035 | |
| 1036 | HOWTO (R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC, /* type */ |
| 1037 | 0, /* rightshift */ |
| 1038 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1039 | 32, /* bitsize */ |
| 1040 | FALSE, /* pc_relative */ |
| 1041 | 0, /* bitpos */ |
| 1042 | complain_overflow_dont, /* complain_on_overflow */ |
| 1043 | bfd_elf_generic_reloc, /* special_function */ |
| 1044 | "R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC", /* name */ |
| 1045 | FALSE, /* partial_inplace */ |
| 1046 | 0xffff, /* src_mask */ |
| 1047 | 0xffff, /* dst_mask */ |
| 1048 | FALSE), /* pcrel_offset */ |
| 1049 | |
| 1050 | HOWTO (R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21, /* type */ |
| 1051 | 12, /* rightshift */ |
| 1052 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1053 | 21, /* bitsize */ |
| 1054 | FALSE, /* pc_relative */ |
| 1055 | 0, /* bitpos */ |
| 1056 | complain_overflow_dont, /* complain_on_overflow */ |
| 1057 | bfd_elf_generic_reloc, /* special_function */ |
| 1058 | "R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21", /* name */ |
| 1059 | FALSE, /* partial_inplace */ |
| 1060 | 0x1fffff, /* src_mask */ |
| 1061 | 0x1fffff, /* dst_mask */ |
| 1062 | FALSE), /* pcrel_offset */ |
| 1063 | |
| 1064 | HOWTO (R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC, /* type */ |
| 1065 | 3, /* rightshift */ |
| 1066 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1067 | 12, /* bitsize */ |
| 1068 | FALSE, /* pc_relative */ |
| 1069 | 0, /* bitpos */ |
| 1070 | complain_overflow_dont, /* complain_on_overflow */ |
| 1071 | bfd_elf_generic_reloc, /* special_function */ |
| 1072 | "R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC", /* name */ |
| 1073 | FALSE, /* partial_inplace */ |
| 1074 | 0xff8, /* src_mask */ |
| 1075 | 0xff8, /* dst_mask */ |
| 1076 | FALSE), /* pcrel_offset */ |
| 1077 | |
| 1078 | HOWTO (R_AARCH64_TLSIE_LD_GOTTPREL_PREL19, /* type */ |
| 1079 | 2, /* rightshift */ |
| 1080 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1081 | 21, /* bitsize */ |
| 1082 | FALSE, /* pc_relative */ |
| 1083 | 0, /* bitpos */ |
| 1084 | complain_overflow_dont, /* complain_on_overflow */ |
| 1085 | bfd_elf_generic_reloc, /* special_function */ |
| 1086 | "R_AARCH64_TLSIE_LD_GOTTPREL_PREL19", /* name */ |
| 1087 | FALSE, /* partial_inplace */ |
| 1088 | 0x1ffffc, /* src_mask */ |
| 1089 | 0x1ffffc, /* dst_mask */ |
| 1090 | FALSE), /* pcrel_offset */ |
| 1091 | |
| 1092 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G2, /* type */ |
| 1093 | 32, /* rightshift */ |
| 1094 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1095 | 12, /* bitsize */ |
| 1096 | FALSE, /* pc_relative */ |
| 1097 | 0, /* bitpos */ |
| 1098 | complain_overflow_dont, /* complain_on_overflow */ |
| 1099 | bfd_elf_generic_reloc, /* special_function */ |
| 1100 | "R_AARCH64_TLSLE_MOVW_TPREL_G2", /* name */ |
| 1101 | FALSE, /* partial_inplace */ |
| 1102 | 0xffff, /* src_mask */ |
| 1103 | 0xffff, /* dst_mask */ |
| 1104 | FALSE), /* pcrel_offset */ |
| 1105 | |
| 1106 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G1, /* type */ |
| 1107 | 16, /* rightshift */ |
| 1108 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1109 | 12, /* bitsize */ |
| 1110 | FALSE, /* pc_relative */ |
| 1111 | 0, /* bitpos */ |
| 1112 | complain_overflow_dont, /* complain_on_overflow */ |
| 1113 | bfd_elf_generic_reloc, /* special_function */ |
| 1114 | "R_AARCH64_TLSLE_MOVW_TPREL_G1", /* name */ |
| 1115 | FALSE, /* partial_inplace */ |
| 1116 | 0xffff, /* src_mask */ |
| 1117 | 0xffff, /* dst_mask */ |
| 1118 | FALSE), /* pcrel_offset */ |
| 1119 | |
| 1120 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G1_NC, /* type */ |
| 1121 | 16, /* rightshift */ |
| 1122 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1123 | 12, /* bitsize */ |
| 1124 | FALSE, /* pc_relative */ |
| 1125 | 0, /* bitpos */ |
| 1126 | complain_overflow_dont, /* complain_on_overflow */ |
| 1127 | bfd_elf_generic_reloc, /* special_function */ |
| 1128 | "R_AARCH64_TLSLE_MOVW_TPREL_G1_NC", /* name */ |
| 1129 | FALSE, /* partial_inplace */ |
| 1130 | 0xffff, /* src_mask */ |
| 1131 | 0xffff, /* dst_mask */ |
| 1132 | FALSE), /* pcrel_offset */ |
| 1133 | |
| 1134 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G0, /* type */ |
| 1135 | 0, /* rightshift */ |
| 1136 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1137 | 12, /* bitsize */ |
| 1138 | FALSE, /* pc_relative */ |
| 1139 | 0, /* bitpos */ |
| 1140 | complain_overflow_dont, /* complain_on_overflow */ |
| 1141 | bfd_elf_generic_reloc, /* special_function */ |
| 1142 | "R_AARCH64_TLSLE_MOVW_TPREL_G0", /* name */ |
| 1143 | FALSE, /* partial_inplace */ |
| 1144 | 0xffff, /* src_mask */ |
| 1145 | 0xffff, /* dst_mask */ |
| 1146 | FALSE), /* pcrel_offset */ |
| 1147 | |
| 1148 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G0_NC, /* type */ |
| 1149 | 0, /* rightshift */ |
| 1150 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1151 | 12, /* bitsize */ |
| 1152 | FALSE, /* pc_relative */ |
| 1153 | 0, /* bitpos */ |
| 1154 | complain_overflow_dont, /* complain_on_overflow */ |
| 1155 | bfd_elf_generic_reloc, /* special_function */ |
| 1156 | "R_AARCH64_TLSLE_MOVW_TPREL_G0_NC", /* name */ |
| 1157 | FALSE, /* partial_inplace */ |
| 1158 | 0xffff, /* src_mask */ |
| 1159 | 0xffff, /* dst_mask */ |
| 1160 | FALSE), /* pcrel_offset */ |
| 1161 | |
| 1162 | HOWTO (R_AARCH64_TLSLE_ADD_TPREL_HI12, /* type */ |
| 1163 | 12, /* rightshift */ |
| 1164 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1165 | 12, /* bitsize */ |
| 1166 | FALSE, /* pc_relative */ |
| 1167 | 0, /* bitpos */ |
| 1168 | complain_overflow_dont, /* complain_on_overflow */ |
| 1169 | bfd_elf_generic_reloc, /* special_function */ |
| 1170 | "R_AARCH64_TLSLE_ADD_TPREL_HI12", /* name */ |
| 1171 | FALSE, /* partial_inplace */ |
| 1172 | 0xfff, /* src_mask */ |
| 1173 | 0xfff, /* dst_mask */ |
| 1174 | FALSE), /* pcrel_offset */ |
| 1175 | |
| 1176 | HOWTO (R_AARCH64_TLSLE_ADD_TPREL_LO12, /* type */ |
| 1177 | 0, /* 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 | "R_AARCH64_TLSLE_ADD_TPREL_LO12", /* name */ |
| 1185 | FALSE, /* partial_inplace */ |
| 1186 | 0xfff, /* src_mask */ |
| 1187 | 0xfff, /* dst_mask */ |
| 1188 | FALSE), /* pcrel_offset */ |
| 1189 | |
| 1190 | HOWTO (R_AARCH64_TLSLE_ADD_TPREL_LO12_NC, /* type */ |
| 1191 | 0, /* rightshift */ |
| 1192 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1193 | 12, /* bitsize */ |
| 1194 | FALSE, /* pc_relative */ |
| 1195 | 0, /* bitpos */ |
| 1196 | complain_overflow_dont, /* complain_on_overflow */ |
| 1197 | bfd_elf_generic_reloc, /* special_function */ |
| 1198 | "R_AARCH64_TLSLE_ADD_TPREL_LO12_NC", /* name */ |
| 1199 | FALSE, /* partial_inplace */ |
| 1200 | 0xfff, /* src_mask */ |
| 1201 | 0xfff, /* dst_mask */ |
| 1202 | FALSE), /* pcrel_offset */ |
| 1203 | }; |
| 1204 | |
| 1205 | static reloc_howto_type elf64_aarch64_tlsdesc_howto_table[] = |
| 1206 | { |
| 1207 | HOWTO (R_AARCH64_TLSDESC_LD64_PREL19, /* type */ |
| 1208 | 2, /* rightshift */ |
| 1209 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1210 | 21, /* bitsize */ |
| 1211 | TRUE, /* pc_relative */ |
| 1212 | 0, /* bitpos */ |
| 1213 | complain_overflow_dont, /* complain_on_overflow */ |
| 1214 | bfd_elf_generic_reloc, /* special_function */ |
| 1215 | "R_AARCH64_TLSDESC_LD64_PREL19", /* name */ |
| 1216 | FALSE, /* partial_inplace */ |
| 1217 | 0x1ffffc, /* src_mask */ |
| 1218 | 0x1ffffc, /* dst_mask */ |
| 1219 | TRUE), /* pcrel_offset */ |
| 1220 | |
| 1221 | HOWTO (R_AARCH64_TLSDESC_ADR_PREL21, /* type */ |
| 1222 | 0, /* rightshift */ |
| 1223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1224 | 21, /* bitsize */ |
| 1225 | TRUE, /* pc_relative */ |
| 1226 | 0, /* bitpos */ |
| 1227 | complain_overflow_dont, /* complain_on_overflow */ |
| 1228 | bfd_elf_generic_reloc, /* special_function */ |
| 1229 | "R_AARCH64_TLSDESC_ADR_PREL21", /* name */ |
| 1230 | FALSE, /* partial_inplace */ |
| 1231 | 0x1fffff, /* src_mask */ |
| 1232 | 0x1fffff, /* dst_mask */ |
| 1233 | TRUE), /* pcrel_offset */ |
| 1234 | |
| 1235 | /* Get to the page for the GOT entry for the symbol |
| 1236 | (G(S) - P) using an ADRP instruction. */ |
| 1237 | HOWTO (R_AARCH64_TLSDESC_ADR_PAGE, /* type */ |
| 1238 | 12, /* rightshift */ |
| 1239 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1240 | 21, /* bitsize */ |
| 1241 | TRUE, /* pc_relative */ |
| 1242 | 0, /* bitpos */ |
| 1243 | complain_overflow_dont, /* complain_on_overflow */ |
| 1244 | bfd_elf_generic_reloc, /* special_function */ |
| 1245 | "R_AARCH64_TLSDESC_ADR_PAGE", /* name */ |
| 1246 | FALSE, /* partial_inplace */ |
| 1247 | 0x1fffff, /* src_mask */ |
| 1248 | 0x1fffff, /* dst_mask */ |
| 1249 | TRUE), /* pcrel_offset */ |
| 1250 | |
| 1251 | /* LD64: GOT offset G(S) & 0xfff. */ |
| 1252 | HOWTO (R_AARCH64_TLSDESC_LD64_LO12_NC, /* type */ |
| 1253 | 3, /* rightshift */ |
| 1254 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1255 | 12, /* bitsize */ |
| 1256 | FALSE, /* pc_relative */ |
| 1257 | 0, /* bitpos */ |
| 1258 | complain_overflow_dont, /* complain_on_overflow */ |
| 1259 | bfd_elf_generic_reloc, /* special_function */ |
| 1260 | "R_AARCH64_TLSDESC_LD64_LO12_NC", /* name */ |
| 1261 | FALSE, /* partial_inplace */ |
| 1262 | 0xfff, /* src_mask */ |
| 1263 | 0xfff, /* dst_mask */ |
| 1264 | FALSE), /* pcrel_offset */ |
| 1265 | |
| 1266 | /* ADD: GOT offset G(S) & 0xfff. */ |
| 1267 | HOWTO (R_AARCH64_TLSDESC_ADD_LO12_NC, /* type */ |
| 1268 | 0, /* rightshift */ |
| 1269 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1270 | 12, /* bitsize */ |
| 1271 | FALSE, /* pc_relative */ |
| 1272 | 0, /* bitpos */ |
| 1273 | complain_overflow_dont, /* complain_on_overflow */ |
| 1274 | bfd_elf_generic_reloc, /* special_function */ |
| 1275 | "R_AARCH64_TLSDESC_ADD_LO12_NC", /* name */ |
| 1276 | FALSE, /* partial_inplace */ |
| 1277 | 0xfff, /* src_mask */ |
| 1278 | 0xfff, /* dst_mask */ |
| 1279 | FALSE), /* pcrel_offset */ |
| 1280 | |
| 1281 | HOWTO (R_AARCH64_TLSDESC_OFF_G1, /* type */ |
| 1282 | 16, /* rightshift */ |
| 1283 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1284 | 12, /* bitsize */ |
| 1285 | FALSE, /* pc_relative */ |
| 1286 | 0, /* bitpos */ |
| 1287 | complain_overflow_dont, /* complain_on_overflow */ |
| 1288 | bfd_elf_generic_reloc, /* special_function */ |
| 1289 | "R_AARCH64_TLSDESC_OFF_G1", /* name */ |
| 1290 | FALSE, /* partial_inplace */ |
| 1291 | 0xffff, /* src_mask */ |
| 1292 | 0xffff, /* dst_mask */ |
| 1293 | FALSE), /* pcrel_offset */ |
| 1294 | |
| 1295 | HOWTO (R_AARCH64_TLSDESC_OFF_G0_NC, /* type */ |
| 1296 | 0, /* rightshift */ |
| 1297 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1298 | 12, /* bitsize */ |
| 1299 | FALSE, /* pc_relative */ |
| 1300 | 0, /* bitpos */ |
| 1301 | complain_overflow_dont, /* complain_on_overflow */ |
| 1302 | bfd_elf_generic_reloc, /* special_function */ |
| 1303 | "R_AARCH64_TLSDESC_OFF_G0_NC", /* name */ |
| 1304 | FALSE, /* partial_inplace */ |
| 1305 | 0xffff, /* src_mask */ |
| 1306 | 0xffff, /* dst_mask */ |
| 1307 | FALSE), /* pcrel_offset */ |
| 1308 | |
| 1309 | HOWTO (R_AARCH64_TLSDESC_LDR, /* type */ |
| 1310 | 0, /* rightshift */ |
| 1311 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1312 | 12, /* bitsize */ |
| 1313 | FALSE, /* pc_relative */ |
| 1314 | 0, /* bitpos */ |
| 1315 | complain_overflow_dont, /* complain_on_overflow */ |
| 1316 | bfd_elf_generic_reloc, /* special_function */ |
| 1317 | "R_AARCH64_TLSDESC_LDR", /* name */ |
| 1318 | FALSE, /* partial_inplace */ |
| 1319 | 0x0, /* src_mask */ |
| 1320 | 0x0, /* dst_mask */ |
| 1321 | FALSE), /* pcrel_offset */ |
| 1322 | |
| 1323 | HOWTO (R_AARCH64_TLSDESC_ADD, /* type */ |
| 1324 | 0, /* rightshift */ |
| 1325 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1326 | 12, /* bitsize */ |
| 1327 | FALSE, /* pc_relative */ |
| 1328 | 0, /* bitpos */ |
| 1329 | complain_overflow_dont, /* complain_on_overflow */ |
| 1330 | bfd_elf_generic_reloc, /* special_function */ |
| 1331 | "R_AARCH64_TLSDESC_ADD", /* name */ |
| 1332 | FALSE, /* partial_inplace */ |
| 1333 | 0x0, /* src_mask */ |
| 1334 | 0x0, /* dst_mask */ |
| 1335 | FALSE), /* pcrel_offset */ |
| 1336 | |
| 1337 | HOWTO (R_AARCH64_TLSDESC_CALL, /* type */ |
| 1338 | 0, /* rightshift */ |
| 1339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1340 | 12, /* bitsize */ |
| 1341 | FALSE, /* pc_relative */ |
| 1342 | 0, /* bitpos */ |
| 1343 | complain_overflow_dont, /* complain_on_overflow */ |
| 1344 | bfd_elf_generic_reloc, /* special_function */ |
| 1345 | "R_AARCH64_TLSDESC_CALL", /* name */ |
| 1346 | FALSE, /* partial_inplace */ |
| 1347 | 0x0, /* src_mask */ |
| 1348 | 0x0, /* dst_mask */ |
| 1349 | FALSE), /* pcrel_offset */ |
| 1350 | }; |
| 1351 | |
| 1352 | static reloc_howto_type * |
| 1353 | elf64_aarch64_howto_from_type (unsigned int r_type) |
| 1354 | { |
| 1355 | if (r_type >= R_AARCH64_static_min && r_type < R_AARCH64_static_max) |
| 1356 | return &elf64_aarch64_howto_table[r_type - R_AARCH64_static_min]; |
| 1357 | |
| 1358 | if (r_type >= R_AARCH64_tls_min && r_type < R_AARCH64_tls_max) |
| 1359 | return &elf64_aarch64_tls_howto_table[r_type - R_AARCH64_tls_min]; |
| 1360 | |
| 1361 | if (r_type >= R_AARCH64_tlsdesc_min && r_type < R_AARCH64_tlsdesc_max) |
| 1362 | return &elf64_aarch64_tlsdesc_howto_table[r_type - R_AARCH64_tlsdesc_min]; |
| 1363 | |
| 1364 | if (r_type >= R_AARCH64_dyn_min && r_type < R_AARCH64_dyn_max) |
| 1365 | return &elf64_aarch64_howto_dynrelocs[r_type - R_AARCH64_dyn_min]; |
| 1366 | |
| 1367 | switch (r_type) |
| 1368 | { |
| 1369 | case R_AARCH64_NONE: |
| 1370 | return &elf64_aarch64_howto_none; |
| 1371 | |
| 1372 | } |
| 1373 | bfd_set_error (bfd_error_bad_value); |
| 1374 | return NULL; |
| 1375 | } |
| 1376 | |
| 1377 | static void |
| 1378 | elf64_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, |
| 1379 | Elf_Internal_Rela *elf_reloc) |
| 1380 | { |
| 1381 | unsigned int r_type; |
| 1382 | |
| 1383 | r_type = ELF64_R_TYPE (elf_reloc->r_info); |
| 1384 | bfd_reloc->howto = elf64_aarch64_howto_from_type (r_type); |
| 1385 | } |
| 1386 | |
| 1387 | struct elf64_aarch64_reloc_map |
| 1388 | { |
| 1389 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1390 | unsigned int elf_reloc_val; |
| 1391 | }; |
| 1392 | |
| 1393 | /* All entries in this list must also be present in |
| 1394 | elf64_aarch64_howto_table. */ |
| 1395 | static const struct elf64_aarch64_reloc_map elf64_aarch64_reloc_map[] = |
| 1396 | { |
| 1397 | {BFD_RELOC_NONE, R_AARCH64_NONE}, |
| 1398 | |
| 1399 | /* Basic data relocations. */ |
| 1400 | {BFD_RELOC_CTOR, R_AARCH64_ABS64}, |
| 1401 | {BFD_RELOC_64, R_AARCH64_ABS64}, |
| 1402 | {BFD_RELOC_32, R_AARCH64_ABS32}, |
| 1403 | {BFD_RELOC_16, R_AARCH64_ABS16}, |
| 1404 | {BFD_RELOC_64_PCREL, R_AARCH64_PREL64}, |
| 1405 | {BFD_RELOC_32_PCREL, R_AARCH64_PREL32}, |
| 1406 | {BFD_RELOC_16_PCREL, R_AARCH64_PREL16}, |
| 1407 | |
| 1408 | /* Group relocations to low order bits of a 16, 32, 48 or 64 bit |
| 1409 | value inline. */ |
| 1410 | {BFD_RELOC_AARCH64_MOVW_G0_NC, R_AARCH64_MOVW_UABS_G0_NC}, |
| 1411 | {BFD_RELOC_AARCH64_MOVW_G1_NC, R_AARCH64_MOVW_UABS_G1_NC}, |
| 1412 | {BFD_RELOC_AARCH64_MOVW_G2_NC, R_AARCH64_MOVW_UABS_G2_NC}, |
| 1413 | |
| 1414 | /* Group relocations to create high bits of a 16, 32, 48 or 64 bit |
| 1415 | signed value inline. */ |
| 1416 | {BFD_RELOC_AARCH64_MOVW_G0_S, R_AARCH64_MOVW_SABS_G0}, |
| 1417 | {BFD_RELOC_AARCH64_MOVW_G1_S, R_AARCH64_MOVW_SABS_G1}, |
| 1418 | {BFD_RELOC_AARCH64_MOVW_G2_S, R_AARCH64_MOVW_SABS_G2}, |
| 1419 | |
| 1420 | /* Group relocations to create high bits of a 16, 32, 48 or 64 bit |
| 1421 | unsigned value inline. */ |
| 1422 | {BFD_RELOC_AARCH64_MOVW_G0, R_AARCH64_MOVW_UABS_G0}, |
| 1423 | {BFD_RELOC_AARCH64_MOVW_G1, R_AARCH64_MOVW_UABS_G1}, |
| 1424 | {BFD_RELOC_AARCH64_MOVW_G2, R_AARCH64_MOVW_UABS_G2}, |
| 1425 | {BFD_RELOC_AARCH64_MOVW_G3, R_AARCH64_MOVW_UABS_G3}, |
| 1426 | |
| 1427 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store. */ |
| 1428 | {BFD_RELOC_AARCH64_LD_LO19_PCREL, R_AARCH64_LD_PREL_LO19}, |
| 1429 | {BFD_RELOC_AARCH64_ADR_LO21_PCREL, R_AARCH64_ADR_PREL_LO21}, |
| 1430 | {BFD_RELOC_AARCH64_ADR_HI21_PCREL, R_AARCH64_ADR_PREL_PG_HI21}, |
| 1431 | {BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL, R_AARCH64_ADR_PREL_PG_HI21_NC}, |
| 1432 | {BFD_RELOC_AARCH64_ADD_LO12, R_AARCH64_ADD_ABS_LO12_NC}, |
| 1433 | {BFD_RELOC_AARCH64_LDST8_LO12, R_AARCH64_LDST8_ABS_LO12_NC}, |
| 1434 | {BFD_RELOC_AARCH64_LDST16_LO12, R_AARCH64_LDST16_ABS_LO12_NC}, |
| 1435 | {BFD_RELOC_AARCH64_LDST32_LO12, R_AARCH64_LDST32_ABS_LO12_NC}, |
| 1436 | {BFD_RELOC_AARCH64_LDST64_LO12, R_AARCH64_LDST64_ABS_LO12_NC}, |
| 1437 | {BFD_RELOC_AARCH64_LDST128_LO12, R_AARCH64_LDST128_ABS_LO12_NC}, |
| 1438 | |
| 1439 | /* Relocations for control-flow instructions. */ |
| 1440 | {BFD_RELOC_AARCH64_TSTBR14, R_AARCH64_TSTBR14}, |
| 1441 | {BFD_RELOC_AARCH64_BRANCH19, R_AARCH64_CONDBR19}, |
| 1442 | {BFD_RELOC_AARCH64_JUMP26, R_AARCH64_JUMP26}, |
| 1443 | {BFD_RELOC_AARCH64_CALL26, R_AARCH64_CALL26}, |
| 1444 | |
| 1445 | /* Relocations for PIC. */ |
| 1446 | {BFD_RELOC_AARCH64_GOT_LD_PREL19, R_AARCH64_GOT_LD_PREL19}, |
| 1447 | {BFD_RELOC_AARCH64_ADR_GOT_PAGE, R_AARCH64_ADR_GOT_PAGE}, |
| 1448 | {BFD_RELOC_AARCH64_LD64_GOT_LO12_NC, R_AARCH64_LD64_GOT_LO12_NC}, |
| 1449 | |
| 1450 | /* Relocations for TLS. */ |
| 1451 | {BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21, R_AARCH64_TLSGD_ADR_PAGE21}, |
| 1452 | {BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC, R_AARCH64_TLSGD_ADD_LO12_NC}, |
| 1453 | {BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1, |
| 1454 | R_AARCH64_TLSIE_MOVW_GOTTPREL_G1}, |
| 1455 | {BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC, |
| 1456 | R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC}, |
| 1457 | {BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21, |
| 1458 | R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21}, |
| 1459 | {BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC, |
| 1460 | R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC}, |
| 1461 | {BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19, |
| 1462 | R_AARCH64_TLSIE_LD_GOTTPREL_PREL19}, |
| 1463 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2, R_AARCH64_TLSLE_MOVW_TPREL_G2}, |
| 1464 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1, R_AARCH64_TLSLE_MOVW_TPREL_G1}, |
| 1465 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC, |
| 1466 | R_AARCH64_TLSLE_MOVW_TPREL_G1_NC}, |
| 1467 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0, R_AARCH64_TLSLE_MOVW_TPREL_G0}, |
| 1468 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC, |
| 1469 | R_AARCH64_TLSLE_MOVW_TPREL_G0_NC}, |
| 1470 | {BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12, R_AARCH64_TLSLE_ADD_TPREL_LO12}, |
| 1471 | {BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12, R_AARCH64_TLSLE_ADD_TPREL_HI12}, |
| 1472 | {BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC, |
| 1473 | R_AARCH64_TLSLE_ADD_TPREL_LO12_NC}, |
| 1474 | {BFD_RELOC_AARCH64_TLSDESC_LD64_PREL19, R_AARCH64_TLSDESC_LD64_PREL19}, |
| 1475 | {BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21, R_AARCH64_TLSDESC_ADR_PREL21}, |
| 1476 | {BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE, R_AARCH64_TLSDESC_ADR_PAGE}, |
| 1477 | {BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC, R_AARCH64_TLSDESC_ADD_LO12_NC}, |
| 1478 | {BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC, R_AARCH64_TLSDESC_LD64_LO12_NC}, |
| 1479 | {BFD_RELOC_AARCH64_TLSDESC_OFF_G1, R_AARCH64_TLSDESC_OFF_G1}, |
| 1480 | {BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC, R_AARCH64_TLSDESC_OFF_G0_NC}, |
| 1481 | {BFD_RELOC_AARCH64_TLSDESC_LDR, R_AARCH64_TLSDESC_LDR}, |
| 1482 | {BFD_RELOC_AARCH64_TLSDESC_ADD, R_AARCH64_TLSDESC_ADD}, |
| 1483 | {BFD_RELOC_AARCH64_TLSDESC_CALL, R_AARCH64_TLSDESC_CALL}, |
| 1484 | {BFD_RELOC_AARCH64_TLS_DTPMOD64, R_AARCH64_TLS_DTPMOD64}, |
| 1485 | {BFD_RELOC_AARCH64_TLS_DTPREL64, R_AARCH64_TLS_DTPREL64}, |
| 1486 | {BFD_RELOC_AARCH64_TLS_TPREL64, R_AARCH64_TLS_TPREL64}, |
| 1487 | {BFD_RELOC_AARCH64_TLSDESC, R_AARCH64_TLSDESC}, |
| 1488 | }; |
| 1489 | |
| 1490 | static reloc_howto_type * |
| 1491 | elf64_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1492 | bfd_reloc_code_real_type code) |
| 1493 | { |
| 1494 | unsigned int i; |
| 1495 | |
| 1496 | for (i = 0; i < ARRAY_SIZE (elf64_aarch64_reloc_map); i++) |
| 1497 | if (elf64_aarch64_reloc_map[i].bfd_reloc_val == code) |
| 1498 | return elf64_aarch64_howto_from_type |
| 1499 | (elf64_aarch64_reloc_map[i].elf_reloc_val); |
| 1500 | |
| 1501 | bfd_set_error (bfd_error_bad_value); |
| 1502 | return NULL; |
| 1503 | } |
| 1504 | |
| 1505 | static reloc_howto_type * |
| 1506 | elf64_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1507 | const char *r_name) |
| 1508 | { |
| 1509 | unsigned int i; |
| 1510 | |
| 1511 | for (i = 0; i < ARRAY_SIZE (elf64_aarch64_howto_table); i++) |
| 1512 | if (elf64_aarch64_howto_table[i].name != NULL |
| 1513 | && strcasecmp (elf64_aarch64_howto_table[i].name, r_name) == 0) |
| 1514 | return &elf64_aarch64_howto_table[i]; |
| 1515 | |
| 1516 | return NULL; |
| 1517 | } |
| 1518 | |
| 1519 | #define TARGET_LITTLE_SYM bfd_elf64_littleaarch64_vec |
| 1520 | #define TARGET_LITTLE_NAME "elf64-littleaarch64" |
| 1521 | #define TARGET_BIG_SYM bfd_elf64_bigaarch64_vec |
| 1522 | #define TARGET_BIG_NAME "elf64-bigaarch64" |
| 1523 | |
| 1524 | typedef unsigned long int insn32; |
| 1525 | |
| 1526 | /* The linker script knows the section names for placement. |
| 1527 | The entry_names are used to do simple name mangling on the stubs. |
| 1528 | Given a function name, and its type, the stub can be found. The |
| 1529 | name can be changed. The only requirement is the %s be present. */ |
| 1530 | #define STUB_ENTRY_NAME "__%s_veneer" |
| 1531 | |
| 1532 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1533 | section. */ |
| 1534 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 1535 | |
| 1536 | #define AARCH64_MAX_FWD_BRANCH_OFFSET \ |
| 1537 | (((1 << 25) - 1) << 2) |
| 1538 | #define AARCH64_MAX_BWD_BRANCH_OFFSET \ |
| 1539 | (-((1 << 25) << 2)) |
| 1540 | |
| 1541 | #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) |
| 1542 | #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) |
| 1543 | |
| 1544 | static int |
| 1545 | aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) |
| 1546 | { |
| 1547 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; |
| 1548 | return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; |
| 1549 | } |
| 1550 | |
| 1551 | static int |
| 1552 | aarch64_valid_branch_p (bfd_vma value, bfd_vma place) |
| 1553 | { |
| 1554 | bfd_signed_vma offset = (bfd_signed_vma) (value - place); |
| 1555 | return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET |
| 1556 | && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); |
| 1557 | } |
| 1558 | |
| 1559 | static const uint32_t aarch64_adrp_branch_stub [] = |
| 1560 | { |
| 1561 | 0x90000010, /* adrp ip0, X */ |
| 1562 | /* R_AARCH64_ADR_HI21_PCREL(X) */ |
| 1563 | 0x91000210, /* add ip0, ip0, :lo12:X */ |
| 1564 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ |
| 1565 | 0xd61f0200, /* br ip0 */ |
| 1566 | }; |
| 1567 | |
| 1568 | static const uint32_t aarch64_long_branch_stub[] = |
| 1569 | { |
| 1570 | 0x58000090, /* ldr ip0, 1f */ |
| 1571 | 0x10000011, /* adr ip1, #0 */ |
| 1572 | 0x8b110210, /* add ip0, ip0, ip1 */ |
| 1573 | 0xd61f0200, /* br ip0 */ |
| 1574 | 0x00000000, /* 1: .xword |
| 1575 | R_AARCH64_PREL64(X) + 12 |
| 1576 | */ |
| 1577 | 0x00000000, |
| 1578 | }; |
| 1579 | |
| 1580 | /* Section name for stubs is the associated section name plus this |
| 1581 | string. */ |
| 1582 | #define STUB_SUFFIX ".stub" |
| 1583 | |
| 1584 | enum elf64_aarch64_stub_type |
| 1585 | { |
| 1586 | aarch64_stub_none, |
| 1587 | aarch64_stub_adrp_branch, |
| 1588 | aarch64_stub_long_branch, |
| 1589 | }; |
| 1590 | |
| 1591 | struct elf64_aarch64_stub_hash_entry |
| 1592 | { |
| 1593 | /* Base hash table entry structure. */ |
| 1594 | struct bfd_hash_entry root; |
| 1595 | |
| 1596 | /* The stub section. */ |
| 1597 | asection *stub_sec; |
| 1598 | |
| 1599 | /* Offset within stub_sec of the beginning of this stub. */ |
| 1600 | bfd_vma stub_offset; |
| 1601 | |
| 1602 | /* Given the symbol's value and its section we can determine its final |
| 1603 | value when building the stubs (so the stub knows where to jump). */ |
| 1604 | bfd_vma target_value; |
| 1605 | asection *target_section; |
| 1606 | |
| 1607 | enum elf64_aarch64_stub_type stub_type; |
| 1608 | |
| 1609 | /* The symbol table entry, if any, that this was derived from. */ |
| 1610 | struct elf64_aarch64_link_hash_entry *h; |
| 1611 | |
| 1612 | /* Destination symbol type */ |
| 1613 | unsigned char st_type; |
| 1614 | |
| 1615 | /* Where this stub is being called from, or, in the case of combined |
| 1616 | stub sections, the first input section in the group. */ |
| 1617 | asection *id_sec; |
| 1618 | |
| 1619 | /* The name for the local symbol at the start of this stub. The |
| 1620 | stub name in the hash table has to be unique; this does not, so |
| 1621 | it can be friendlier. */ |
| 1622 | char *output_name; |
| 1623 | }; |
| 1624 | |
| 1625 | /* Used to build a map of a section. This is required for mixed-endian |
| 1626 | code/data. */ |
| 1627 | |
| 1628 | typedef struct elf64_elf_section_map |
| 1629 | { |
| 1630 | bfd_vma vma; |
| 1631 | char type; |
| 1632 | } |
| 1633 | elf64_aarch64_section_map; |
| 1634 | |
| 1635 | |
| 1636 | typedef struct _aarch64_elf_section_data |
| 1637 | { |
| 1638 | struct bfd_elf_section_data elf; |
| 1639 | unsigned int mapcount; |
| 1640 | unsigned int mapsize; |
| 1641 | elf64_aarch64_section_map *map; |
| 1642 | } |
| 1643 | _aarch64_elf_section_data; |
| 1644 | |
| 1645 | #define elf64_aarch64_section_data(sec) \ |
| 1646 | ((_aarch64_elf_section_data *) elf_section_data (sec)) |
| 1647 | |
| 1648 | /* The size of the thread control block. */ |
| 1649 | #define TCB_SIZE 16 |
| 1650 | |
| 1651 | struct elf_aarch64_local_symbol |
| 1652 | { |
| 1653 | unsigned int got_type; |
| 1654 | bfd_signed_vma got_refcount; |
| 1655 | bfd_vma got_offset; |
| 1656 | |
| 1657 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The |
| 1658 | offset is from the end of the jump table and reserved entries |
| 1659 | within the PLTGOT. |
| 1660 | |
| 1661 | The magic value (bfd_vma) -1 indicates that an offset has not be |
| 1662 | allocated. */ |
| 1663 | bfd_vma tlsdesc_got_jump_table_offset; |
| 1664 | }; |
| 1665 | |
| 1666 | struct elf_aarch64_obj_tdata |
| 1667 | { |
| 1668 | struct elf_obj_tdata root; |
| 1669 | |
| 1670 | /* local symbol descriptors */ |
| 1671 | struct elf_aarch64_local_symbol *locals; |
| 1672 | |
| 1673 | /* Zero to warn when linking objects with incompatible enum sizes. */ |
| 1674 | int no_enum_size_warning; |
| 1675 | |
| 1676 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ |
| 1677 | int no_wchar_size_warning; |
| 1678 | }; |
| 1679 | |
| 1680 | #define elf_aarch64_tdata(bfd) \ |
| 1681 | ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) |
| 1682 | |
| 1683 | #define elf64_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) |
| 1684 | |
| 1685 | #define is_aarch64_elf(bfd) \ |
| 1686 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 1687 | && elf_tdata (bfd) != NULL \ |
| 1688 | && elf_object_id (bfd) == AARCH64_ELF_DATA) |
| 1689 | |
| 1690 | static bfd_boolean |
| 1691 | elf64_aarch64_mkobject (bfd *abfd) |
| 1692 | { |
| 1693 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), |
| 1694 | AARCH64_ELF_DATA); |
| 1695 | } |
| 1696 | |
| 1697 | /* The AArch64 linker needs to keep track of the number of relocs that it |
| 1698 | decides to copy in check_relocs for each symbol. This is so that |
| 1699 | it can discard PC relative relocs if it doesn't need them when |
| 1700 | linking with -Bsymbolic. We store the information in a field |
| 1701 | extending the regular ELF linker hash table. */ |
| 1702 | |
| 1703 | /* This structure keeps track of the number of relocs we have copied |
| 1704 | for a given symbol. */ |
| 1705 | struct elf64_aarch64_relocs_copied |
| 1706 | { |
| 1707 | /* Next section. */ |
| 1708 | struct elf64_aarch64_relocs_copied *next; |
| 1709 | /* A section in dynobj. */ |
| 1710 | asection *section; |
| 1711 | /* Number of relocs copied in this section. */ |
| 1712 | bfd_size_type count; |
| 1713 | /* Number of PC-relative relocs copied in this section. */ |
| 1714 | bfd_size_type pc_count; |
| 1715 | }; |
| 1716 | |
| 1717 | #define elf64_aarch64_hash_entry(ent) \ |
| 1718 | ((struct elf64_aarch64_link_hash_entry *)(ent)) |
| 1719 | |
| 1720 | #define GOT_UNKNOWN 0 |
| 1721 | #define GOT_NORMAL 1 |
| 1722 | #define GOT_TLS_GD 2 |
| 1723 | #define GOT_TLS_IE 4 |
| 1724 | #define GOT_TLSDESC_GD 8 |
| 1725 | |
| 1726 | #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) |
| 1727 | |
| 1728 | /* AArch64 ELF linker hash entry. */ |
| 1729 | struct elf64_aarch64_link_hash_entry |
| 1730 | { |
| 1731 | struct elf_link_hash_entry root; |
| 1732 | |
| 1733 | /* Track dynamic relocs copied for this symbol. */ |
| 1734 | struct elf_dyn_relocs *dyn_relocs; |
| 1735 | |
| 1736 | /* Number of PC relative relocs copied for this symbol. */ |
| 1737 | struct elf64_aarch64_relocs_copied *relocs_copied; |
| 1738 | |
| 1739 | /* Since PLT entries have variable size, we need to record the |
| 1740 | index into .got.plt instead of recomputing it from the PLT |
| 1741 | offset. */ |
| 1742 | bfd_signed_vma plt_got_offset; |
| 1743 | |
| 1744 | /* Bit mask representing the type of GOT entry(s) if any required by |
| 1745 | this symbol. */ |
| 1746 | unsigned int got_type; |
| 1747 | |
| 1748 | /* A pointer to the most recently used stub hash entry against this |
| 1749 | symbol. */ |
| 1750 | struct elf64_aarch64_stub_hash_entry *stub_cache; |
| 1751 | |
| 1752 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset |
| 1753 | is from the end of the jump table and reserved entries within the PLTGOT. |
| 1754 | |
| 1755 | The magic value (bfd_vma) -1 indicates that an offset has not |
| 1756 | be allocated. */ |
| 1757 | bfd_vma tlsdesc_got_jump_table_offset; |
| 1758 | }; |
| 1759 | |
| 1760 | static unsigned int |
| 1761 | elf64_aarch64_symbol_got_type (struct elf_link_hash_entry *h, |
| 1762 | bfd *abfd, |
| 1763 | unsigned long r_symndx) |
| 1764 | { |
| 1765 | if (h) |
| 1766 | return elf64_aarch64_hash_entry (h)->got_type; |
| 1767 | |
| 1768 | if (! elf64_aarch64_locals (abfd)) |
| 1769 | return GOT_UNKNOWN; |
| 1770 | |
| 1771 | return elf64_aarch64_locals (abfd)[r_symndx].got_type; |
| 1772 | } |
| 1773 | |
| 1774 | /* Traverse an AArch64 ELF linker hash table. */ |
| 1775 | #define elf64_aarch64_link_hash_traverse(table, func, info) \ |
| 1776 | (elf_link_hash_traverse \ |
| 1777 | (&(table)->root, \ |
| 1778 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 1779 | (info))) |
| 1780 | |
| 1781 | /* Get the AArch64 elf linker hash table from a link_info structure. */ |
| 1782 | #define elf64_aarch64_hash_table(info) \ |
| 1783 | ((struct elf64_aarch64_link_hash_table *) ((info)->hash)) |
| 1784 | |
| 1785 | #define aarch64_stub_hash_lookup(table, string, create, copy) \ |
| 1786 | ((struct elf64_aarch64_stub_hash_entry *) \ |
| 1787 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 1788 | |
| 1789 | /* AArch64 ELF linker hash table. */ |
| 1790 | struct elf64_aarch64_link_hash_table |
| 1791 | { |
| 1792 | /* The main hash table. */ |
| 1793 | struct elf_link_hash_table root; |
| 1794 | |
| 1795 | /* Nonzero to force PIC branch veneers. */ |
| 1796 | int pic_veneer; |
| 1797 | |
| 1798 | /* The number of bytes in the initial entry in the PLT. */ |
| 1799 | bfd_size_type plt_header_size; |
| 1800 | |
| 1801 | /* The number of bytes in the subsequent PLT etries. */ |
| 1802 | bfd_size_type plt_entry_size; |
| 1803 | |
| 1804 | /* Short-cuts to get to dynamic linker sections. */ |
| 1805 | asection *sdynbss; |
| 1806 | asection *srelbss; |
| 1807 | |
| 1808 | /* Small local sym cache. */ |
| 1809 | struct sym_cache sym_cache; |
| 1810 | |
| 1811 | /* For convenience in allocate_dynrelocs. */ |
| 1812 | bfd *obfd; |
| 1813 | |
| 1814 | /* The amount of space used by the reserved portion of the sgotplt |
| 1815 | section, plus whatever space is used by the jump slots. */ |
| 1816 | bfd_vma sgotplt_jump_table_size; |
| 1817 | |
| 1818 | /* The stub hash table. */ |
| 1819 | struct bfd_hash_table stub_hash_table; |
| 1820 | |
| 1821 | /* Linker stub bfd. */ |
| 1822 | bfd *stub_bfd; |
| 1823 | |
| 1824 | /* Linker call-backs. */ |
| 1825 | asection *(*add_stub_section) (const char *, asection *); |
| 1826 | void (*layout_sections_again) (void); |
| 1827 | |
| 1828 | /* Array to keep track of which stub sections have been created, and |
| 1829 | information on stub grouping. */ |
| 1830 | struct map_stub |
| 1831 | { |
| 1832 | /* This is the section to which stubs in the group will be |
| 1833 | attached. */ |
| 1834 | asection *link_sec; |
| 1835 | /* The stub section. */ |
| 1836 | asection *stub_sec; |
| 1837 | } *stub_group; |
| 1838 | |
| 1839 | /* Assorted information used by elf64_aarch64_size_stubs. */ |
| 1840 | unsigned int bfd_count; |
| 1841 | int top_index; |
| 1842 | asection **input_list; |
| 1843 | |
| 1844 | /* The offset into splt of the PLT entry for the TLS descriptor |
| 1845 | resolver. Special values are 0, if not necessary (or not found |
| 1846 | to be necessary yet), and -1 if needed but not determined |
| 1847 | yet. */ |
| 1848 | bfd_vma tlsdesc_plt; |
| 1849 | |
| 1850 | /* The GOT offset for the lazy trampoline. Communicated to the |
| 1851 | loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1 |
| 1852 | indicates an offset is not allocated. */ |
| 1853 | bfd_vma dt_tlsdesc_got; |
| 1854 | }; |
| 1855 | |
| 1856 | |
| 1857 | /* Return non-zero if the indicated VALUE has overflowed the maximum |
| 1858 | range expressible by a unsigned number with the indicated number of |
| 1859 | BITS. */ |
| 1860 | |
| 1861 | static bfd_reloc_status_type |
| 1862 | aarch64_unsigned_overflow (bfd_vma value, unsigned int bits) |
| 1863 | { |
| 1864 | bfd_vma lim; |
| 1865 | if (bits >= sizeof (bfd_vma) * 8) |
| 1866 | return bfd_reloc_ok; |
| 1867 | lim = (bfd_vma) 1 << bits; |
| 1868 | if (value >= lim) |
| 1869 | return bfd_reloc_overflow; |
| 1870 | return bfd_reloc_ok; |
| 1871 | } |
| 1872 | |
| 1873 | |
| 1874 | /* Return non-zero if the indicated VALUE has overflowed the maximum |
| 1875 | range expressible by an signed number with the indicated number of |
| 1876 | BITS. */ |
| 1877 | |
| 1878 | static bfd_reloc_status_type |
| 1879 | aarch64_signed_overflow (bfd_vma value, unsigned int bits) |
| 1880 | { |
| 1881 | bfd_signed_vma svalue = (bfd_signed_vma) value; |
| 1882 | bfd_signed_vma lim; |
| 1883 | |
| 1884 | if (bits >= sizeof (bfd_vma) * 8) |
| 1885 | return bfd_reloc_ok; |
| 1886 | lim = (bfd_signed_vma) 1 << (bits - 1); |
| 1887 | if (svalue < -lim || svalue >= lim) |
| 1888 | return bfd_reloc_overflow; |
| 1889 | return bfd_reloc_ok; |
| 1890 | } |
| 1891 | |
| 1892 | /* Create an entry in an AArch64 ELF linker hash table. */ |
| 1893 | |
| 1894 | static struct bfd_hash_entry * |
| 1895 | elf64_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 1896 | struct bfd_hash_table *table, |
| 1897 | const char *string) |
| 1898 | { |
| 1899 | struct elf64_aarch64_link_hash_entry *ret = |
| 1900 | (struct elf64_aarch64_link_hash_entry *) entry; |
| 1901 | |
| 1902 | /* Allocate the structure if it has not already been allocated by a |
| 1903 | subclass. */ |
| 1904 | if (ret == NULL) |
| 1905 | ret = bfd_hash_allocate (table, |
| 1906 | sizeof (struct elf64_aarch64_link_hash_entry)); |
| 1907 | if (ret == NULL) |
| 1908 | return (struct bfd_hash_entry *) ret; |
| 1909 | |
| 1910 | /* Call the allocation method of the superclass. */ |
| 1911 | ret = ((struct elf64_aarch64_link_hash_entry *) |
| 1912 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1913 | table, string)); |
| 1914 | if (ret != NULL) |
| 1915 | { |
| 1916 | ret->dyn_relocs = NULL; |
| 1917 | ret->relocs_copied = NULL; |
| 1918 | ret->got_type = GOT_UNKNOWN; |
| 1919 | ret->plt_got_offset = (bfd_vma) - 1; |
| 1920 | ret->stub_cache = NULL; |
| 1921 | ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 1922 | } |
| 1923 | |
| 1924 | return (struct bfd_hash_entry *) ret; |
| 1925 | } |
| 1926 | |
| 1927 | /* Initialize an entry in the stub hash table. */ |
| 1928 | |
| 1929 | static struct bfd_hash_entry * |
| 1930 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 1931 | struct bfd_hash_table *table, const char *string) |
| 1932 | { |
| 1933 | /* Allocate the structure if it has not already been allocated by a |
| 1934 | subclass. */ |
| 1935 | if (entry == NULL) |
| 1936 | { |
| 1937 | entry = bfd_hash_allocate (table, |
| 1938 | sizeof (struct |
| 1939 | elf64_aarch64_stub_hash_entry)); |
| 1940 | if (entry == NULL) |
| 1941 | return entry; |
| 1942 | } |
| 1943 | |
| 1944 | /* Call the allocation method of the superclass. */ |
| 1945 | entry = bfd_hash_newfunc (entry, table, string); |
| 1946 | if (entry != NULL) |
| 1947 | { |
| 1948 | struct elf64_aarch64_stub_hash_entry *eh; |
| 1949 | |
| 1950 | /* Initialize the local fields. */ |
| 1951 | eh = (struct elf64_aarch64_stub_hash_entry *) entry; |
| 1952 | eh->stub_sec = NULL; |
| 1953 | eh->stub_offset = 0; |
| 1954 | eh->target_value = 0; |
| 1955 | eh->target_section = NULL; |
| 1956 | eh->stub_type = aarch64_stub_none; |
| 1957 | eh->h = NULL; |
| 1958 | eh->id_sec = NULL; |
| 1959 | } |
| 1960 | |
| 1961 | return entry; |
| 1962 | } |
| 1963 | |
| 1964 | |
| 1965 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 1966 | |
| 1967 | static void |
| 1968 | elf64_aarch64_copy_indirect_symbol (struct bfd_link_info *info, |
| 1969 | struct elf_link_hash_entry *dir, |
| 1970 | struct elf_link_hash_entry *ind) |
| 1971 | { |
| 1972 | struct elf64_aarch64_link_hash_entry *edir, *eind; |
| 1973 | |
| 1974 | edir = (struct elf64_aarch64_link_hash_entry *) dir; |
| 1975 | eind = (struct elf64_aarch64_link_hash_entry *) ind; |
| 1976 | |
| 1977 | if (eind->dyn_relocs != NULL) |
| 1978 | { |
| 1979 | if (edir->dyn_relocs != NULL) |
| 1980 | { |
| 1981 | struct elf_dyn_relocs **pp; |
| 1982 | struct elf_dyn_relocs *p; |
| 1983 | |
| 1984 | /* Add reloc counts against the indirect sym to the direct sym |
| 1985 | list. Merge any entries against the same section. */ |
| 1986 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) |
| 1987 | { |
| 1988 | struct elf_dyn_relocs *q; |
| 1989 | |
| 1990 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 1991 | if (q->sec == p->sec) |
| 1992 | { |
| 1993 | q->pc_count += p->pc_count; |
| 1994 | q->count += p->count; |
| 1995 | *pp = p->next; |
| 1996 | break; |
| 1997 | } |
| 1998 | if (q == NULL) |
| 1999 | pp = &p->next; |
| 2000 | } |
| 2001 | *pp = edir->dyn_relocs; |
| 2002 | } |
| 2003 | |
| 2004 | edir->dyn_relocs = eind->dyn_relocs; |
| 2005 | eind->dyn_relocs = NULL; |
| 2006 | } |
| 2007 | |
| 2008 | if (eind->relocs_copied != NULL) |
| 2009 | { |
| 2010 | if (edir->relocs_copied != NULL) |
| 2011 | { |
| 2012 | struct elf64_aarch64_relocs_copied **pp; |
| 2013 | struct elf64_aarch64_relocs_copied *p; |
| 2014 | |
| 2015 | /* Add reloc counts against the indirect sym to the direct sym |
| 2016 | list. Merge any entries against the same section. */ |
| 2017 | for (pp = &eind->relocs_copied; (p = *pp) != NULL;) |
| 2018 | { |
| 2019 | struct elf64_aarch64_relocs_copied *q; |
| 2020 | |
| 2021 | for (q = edir->relocs_copied; q != NULL; q = q->next) |
| 2022 | if (q->section == p->section) |
| 2023 | { |
| 2024 | q->pc_count += p->pc_count; |
| 2025 | q->count += p->count; |
| 2026 | *pp = p->next; |
| 2027 | break; |
| 2028 | } |
| 2029 | if (q == NULL) |
| 2030 | pp = &p->next; |
| 2031 | } |
| 2032 | *pp = edir->relocs_copied; |
| 2033 | } |
| 2034 | |
| 2035 | edir->relocs_copied = eind->relocs_copied; |
| 2036 | eind->relocs_copied = NULL; |
| 2037 | } |
| 2038 | |
| 2039 | if (ind->root.type == bfd_link_hash_indirect) |
| 2040 | { |
| 2041 | /* Copy over PLT info. */ |
| 2042 | if (dir->got.refcount <= 0) |
| 2043 | { |
| 2044 | edir->got_type = eind->got_type; |
| 2045 | eind->got_type = GOT_UNKNOWN; |
| 2046 | } |
| 2047 | } |
| 2048 | |
| 2049 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2050 | } |
| 2051 | |
| 2052 | /* Create an AArch64 elf linker hash table. */ |
| 2053 | |
| 2054 | static struct bfd_link_hash_table * |
| 2055 | elf64_aarch64_link_hash_table_create (bfd *abfd) |
| 2056 | { |
| 2057 | struct elf64_aarch64_link_hash_table *ret; |
| 2058 | bfd_size_type amt = sizeof (struct elf64_aarch64_link_hash_table); |
| 2059 | |
| 2060 | ret = bfd_malloc (amt); |
| 2061 | if (ret == NULL) |
| 2062 | return NULL; |
| 2063 | |
| 2064 | if (!_bfd_elf_link_hash_table_init |
| 2065 | (&ret->root, abfd, elf64_aarch64_link_hash_newfunc, |
| 2066 | sizeof (struct elf64_aarch64_link_hash_entry), AARCH64_ELF_DATA)) |
| 2067 | { |
| 2068 | free (ret); |
| 2069 | return NULL; |
| 2070 | } |
| 2071 | |
| 2072 | ret->sdynbss = NULL; |
| 2073 | ret->srelbss = NULL; |
| 2074 | |
| 2075 | ret->plt_header_size = PLT_ENTRY_SIZE; |
| 2076 | ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; |
| 2077 | |
| 2078 | ret->sym_cache.abfd = NULL; |
| 2079 | ret->obfd = abfd; |
| 2080 | |
| 2081 | ret->stub_bfd = NULL; |
| 2082 | ret->add_stub_section = NULL; |
| 2083 | ret->layout_sections_again = NULL; |
| 2084 | ret->stub_group = NULL; |
| 2085 | ret->bfd_count = 0; |
| 2086 | ret->top_index = 0; |
| 2087 | ret->input_list = NULL; |
| 2088 | ret->tlsdesc_plt = 0; |
| 2089 | ret->dt_tlsdesc_got = (bfd_vma) - 1; |
| 2090 | |
| 2091 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, |
| 2092 | sizeof (struct elf64_aarch64_stub_hash_entry))) |
| 2093 | { |
| 2094 | free (ret); |
| 2095 | return NULL; |
| 2096 | } |
| 2097 | |
| 2098 | return &ret->root.root; |
| 2099 | } |
| 2100 | |
| 2101 | /* Free the derived linker hash table. */ |
| 2102 | |
| 2103 | static void |
| 2104 | elf64_aarch64_hash_table_free (struct bfd_link_hash_table *hash) |
| 2105 | { |
| 2106 | struct elf64_aarch64_link_hash_table *ret |
| 2107 | = (struct elf64_aarch64_link_hash_table *) hash; |
| 2108 | |
| 2109 | bfd_hash_table_free (&ret->stub_hash_table); |
| 2110 | _bfd_generic_link_hash_table_free (hash); |
| 2111 | } |
| 2112 | |
| 2113 | static bfd_vma |
| 2114 | aarch64_resolve_relocation (unsigned int r_type, bfd_vma place, bfd_vma value, |
| 2115 | bfd_vma addend, bfd_boolean weak_undef_p) |
| 2116 | { |
| 2117 | switch (r_type) |
| 2118 | { |
| 2119 | case R_AARCH64_TLSDESC_CALL: |
| 2120 | case R_AARCH64_NONE: |
| 2121 | case R_AARCH64_NULL: |
| 2122 | break; |
| 2123 | |
| 2124 | case R_AARCH64_ADR_PREL_LO21: |
| 2125 | case R_AARCH64_CONDBR19: |
| 2126 | case R_AARCH64_LD_PREL_LO19: |
| 2127 | case R_AARCH64_PREL16: |
| 2128 | case R_AARCH64_PREL32: |
| 2129 | case R_AARCH64_PREL64: |
| 2130 | case R_AARCH64_TSTBR14: |
| 2131 | if (weak_undef_p) |
| 2132 | value = place; |
| 2133 | value = value + addend - place; |
| 2134 | break; |
| 2135 | |
| 2136 | case R_AARCH64_CALL26: |
| 2137 | case R_AARCH64_JUMP26: |
| 2138 | value = value + addend - place; |
| 2139 | break; |
| 2140 | |
| 2141 | case R_AARCH64_ABS16: |
| 2142 | case R_AARCH64_ABS32: |
| 2143 | case R_AARCH64_MOVW_SABS_G0: |
| 2144 | case R_AARCH64_MOVW_SABS_G1: |
| 2145 | case R_AARCH64_MOVW_SABS_G2: |
| 2146 | case R_AARCH64_MOVW_UABS_G0: |
| 2147 | case R_AARCH64_MOVW_UABS_G0_NC: |
| 2148 | case R_AARCH64_MOVW_UABS_G1: |
| 2149 | case R_AARCH64_MOVW_UABS_G1_NC: |
| 2150 | case R_AARCH64_MOVW_UABS_G2: |
| 2151 | case R_AARCH64_MOVW_UABS_G2_NC: |
| 2152 | case R_AARCH64_MOVW_UABS_G3: |
| 2153 | value = value + addend; |
| 2154 | break; |
| 2155 | |
| 2156 | case R_AARCH64_ADR_PREL_PG_HI21: |
| 2157 | case R_AARCH64_ADR_PREL_PG_HI21_NC: |
| 2158 | if (weak_undef_p) |
| 2159 | value = PG (place); |
| 2160 | value = PG (value + addend) - PG (place); |
| 2161 | break; |
| 2162 | |
| 2163 | case R_AARCH64_GOT_LD_PREL19: |
| 2164 | value = value + addend - place; |
| 2165 | break; |
| 2166 | |
| 2167 | case R_AARCH64_ADR_GOT_PAGE: |
| 2168 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 2169 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 2170 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 2171 | value = PG (value + addend) - PG (place); |
| 2172 | break; |
| 2173 | |
| 2174 | case R_AARCH64_ADD_ABS_LO12_NC: |
| 2175 | case R_AARCH64_LD64_GOT_LO12_NC: |
| 2176 | case R_AARCH64_LDST8_ABS_LO12_NC: |
| 2177 | case R_AARCH64_LDST16_ABS_LO12_NC: |
| 2178 | case R_AARCH64_LDST32_ABS_LO12_NC: |
| 2179 | case R_AARCH64_LDST64_ABS_LO12_NC: |
| 2180 | case R_AARCH64_LDST128_ABS_LO12_NC: |
| 2181 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 2182 | case R_AARCH64_TLSDESC_ADD: |
| 2183 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 2184 | case R_AARCH64_TLSDESC_LDR: |
| 2185 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 2186 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 2187 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 2188 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 2189 | value = PG_OFFSET (value + addend); |
| 2190 | break; |
| 2191 | |
| 2192 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 2193 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 2194 | value = (value + addend) & (bfd_vma) 0xffff0000; |
| 2195 | break; |
| 2196 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 2197 | value = (value + addend) & (bfd_vma) 0xfff000; |
| 2198 | break; |
| 2199 | |
| 2200 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 2201 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 2202 | value = (value + addend) & (bfd_vma) 0xffff; |
| 2203 | break; |
| 2204 | |
| 2205 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 2206 | value = (value + addend) & ~(bfd_vma) 0xffffffff; |
| 2207 | value -= place & ~(bfd_vma) 0xffffffff; |
| 2208 | break; |
| 2209 | } |
| 2210 | return value; |
| 2211 | } |
| 2212 | |
| 2213 | static bfd_boolean |
| 2214 | aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, |
| 2215 | bfd_vma offset, bfd_vma value) |
| 2216 | { |
| 2217 | reloc_howto_type *howto; |
| 2218 | bfd_vma place; |
| 2219 | |
| 2220 | howto = elf64_aarch64_howto_from_type (r_type); |
| 2221 | place = (input_section->output_section->vma + input_section->output_offset |
| 2222 | + offset); |
| 2223 | value = aarch64_resolve_relocation (r_type, place, value, 0, FALSE); |
| 2224 | return bfd_elf_aarch64_put_addend (input_bfd, |
| 2225 | input_section->contents + offset, |
| 2226 | howto, value); |
| 2227 | } |
| 2228 | |
| 2229 | static enum elf64_aarch64_stub_type |
| 2230 | aarch64_select_branch_stub (bfd_vma value, bfd_vma place) |
| 2231 | { |
| 2232 | if (aarch64_valid_for_adrp_p (value, place)) |
| 2233 | return aarch64_stub_adrp_branch; |
| 2234 | return aarch64_stub_long_branch; |
| 2235 | } |
| 2236 | |
| 2237 | /* Determine the type of stub needed, if any, for a call. */ |
| 2238 | |
| 2239 | static enum elf64_aarch64_stub_type |
| 2240 | aarch64_type_of_stub (struct bfd_link_info *info, |
| 2241 | asection *input_sec, |
| 2242 | const Elf_Internal_Rela *rel, |
| 2243 | unsigned char st_type, |
| 2244 | struct elf64_aarch64_link_hash_entry *hash, |
| 2245 | bfd_vma destination) |
| 2246 | { |
| 2247 | bfd_vma location; |
| 2248 | bfd_signed_vma branch_offset; |
| 2249 | unsigned int r_type; |
| 2250 | struct elf64_aarch64_link_hash_table *globals; |
| 2251 | enum elf64_aarch64_stub_type stub_type = aarch64_stub_none; |
| 2252 | bfd_boolean via_plt_p; |
| 2253 | |
| 2254 | if (st_type != STT_FUNC) |
| 2255 | return stub_type; |
| 2256 | |
| 2257 | globals = elf64_aarch64_hash_table (info); |
| 2258 | via_plt_p = (globals->root.splt != NULL && hash != NULL |
| 2259 | && hash->root.plt.offset != (bfd_vma) - 1); |
| 2260 | |
| 2261 | if (via_plt_p) |
| 2262 | return stub_type; |
| 2263 | |
| 2264 | /* Determine where the call point is. */ |
| 2265 | location = (input_sec->output_offset |
| 2266 | + input_sec->output_section->vma + rel->r_offset); |
| 2267 | |
| 2268 | branch_offset = (bfd_signed_vma) (destination - location); |
| 2269 | |
| 2270 | r_type = ELF64_R_TYPE (rel->r_info); |
| 2271 | |
| 2272 | /* We don't want to redirect any old unconditional jump in this way, |
| 2273 | only one which is being used for a sibcall, where it is |
| 2274 | acceptable for the IP0 and IP1 registers to be clobbered. */ |
| 2275 | if ((r_type == R_AARCH64_CALL26 || r_type == R_AARCH64_JUMP26) |
| 2276 | && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET |
| 2277 | || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET)) |
| 2278 | { |
| 2279 | stub_type = aarch64_stub_long_branch; |
| 2280 | } |
| 2281 | |
| 2282 | return stub_type; |
| 2283 | } |
| 2284 | |
| 2285 | /* Build a name for an entry in the stub hash table. */ |
| 2286 | |
| 2287 | static char * |
| 2288 | elf64_aarch64_stub_name (const asection *input_section, |
| 2289 | const asection *sym_sec, |
| 2290 | const struct elf64_aarch64_link_hash_entry *hash, |
| 2291 | const Elf_Internal_Rela *rel) |
| 2292 | { |
| 2293 | char *stub_name; |
| 2294 | bfd_size_type len; |
| 2295 | |
| 2296 | if (hash) |
| 2297 | { |
| 2298 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; |
| 2299 | stub_name = bfd_malloc (len); |
| 2300 | if (stub_name != NULL) |
| 2301 | snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x", |
| 2302 | (unsigned int) input_section->id, |
| 2303 | hash->root.root.root.string, |
| 2304 | rel->r_addend); |
| 2305 | } |
| 2306 | else |
| 2307 | { |
| 2308 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; |
| 2309 | stub_name = bfd_malloc (len); |
| 2310 | if (stub_name != NULL) |
| 2311 | snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x", |
| 2312 | (unsigned int) input_section->id, |
| 2313 | (unsigned int) sym_sec->id, |
| 2314 | (unsigned int) ELF64_R_SYM (rel->r_info), |
| 2315 | rel->r_addend); |
| 2316 | } |
| 2317 | |
| 2318 | return stub_name; |
| 2319 | } |
| 2320 | |
| 2321 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 2322 | creating the stub name takes a bit of time. */ |
| 2323 | |
| 2324 | static struct elf64_aarch64_stub_hash_entry * |
| 2325 | elf64_aarch64_get_stub_entry (const asection *input_section, |
| 2326 | const asection *sym_sec, |
| 2327 | struct elf_link_hash_entry *hash, |
| 2328 | const Elf_Internal_Rela *rel, |
| 2329 | struct elf64_aarch64_link_hash_table *htab) |
| 2330 | { |
| 2331 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 2332 | struct elf64_aarch64_link_hash_entry *h = |
| 2333 | (struct elf64_aarch64_link_hash_entry *) hash; |
| 2334 | const asection *id_sec; |
| 2335 | |
| 2336 | if ((input_section->flags & SEC_CODE) == 0) |
| 2337 | return NULL; |
| 2338 | |
| 2339 | /* If this input section is part of a group of sections sharing one |
| 2340 | stub section, then use the id of the first section in the group. |
| 2341 | Stub names need to include a section id, as there may well be |
| 2342 | more than one stub used to reach say, printf, and we need to |
| 2343 | distinguish between them. */ |
| 2344 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 2345 | |
| 2346 | if (h != NULL && h->stub_cache != NULL |
| 2347 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) |
| 2348 | { |
| 2349 | stub_entry = h->stub_cache; |
| 2350 | } |
| 2351 | else |
| 2352 | { |
| 2353 | char *stub_name; |
| 2354 | |
| 2355 | stub_name = elf64_aarch64_stub_name (id_sec, sym_sec, h, rel); |
| 2356 | if (stub_name == NULL) |
| 2357 | return NULL; |
| 2358 | |
| 2359 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 2360 | stub_name, FALSE, FALSE); |
| 2361 | if (h != NULL) |
| 2362 | h->stub_cache = stub_entry; |
| 2363 | |
| 2364 | free (stub_name); |
| 2365 | } |
| 2366 | |
| 2367 | return stub_entry; |
| 2368 | } |
| 2369 | |
| 2370 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 2371 | stub entry are initialised. */ |
| 2372 | |
| 2373 | static struct elf64_aarch64_stub_hash_entry * |
| 2374 | elf64_aarch64_add_stub (const char *stub_name, |
| 2375 | asection *section, |
| 2376 | struct elf64_aarch64_link_hash_table *htab) |
| 2377 | { |
| 2378 | asection *link_sec; |
| 2379 | asection *stub_sec; |
| 2380 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 2381 | |
| 2382 | link_sec = htab->stub_group[section->id].link_sec; |
| 2383 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 2384 | if (stub_sec == NULL) |
| 2385 | { |
| 2386 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 2387 | if (stub_sec == NULL) |
| 2388 | { |
| 2389 | size_t namelen; |
| 2390 | bfd_size_type len; |
| 2391 | char *s_name; |
| 2392 | |
| 2393 | namelen = strlen (link_sec->name); |
| 2394 | len = namelen + sizeof (STUB_SUFFIX); |
| 2395 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 2396 | if (s_name == NULL) |
| 2397 | return NULL; |
| 2398 | |
| 2399 | memcpy (s_name, link_sec->name, namelen); |
| 2400 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 2401 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 2402 | if (stub_sec == NULL) |
| 2403 | return NULL; |
| 2404 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 2405 | } |
| 2406 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 2407 | } |
| 2408 | |
| 2409 | /* Enter this entry into the linker stub hash table. */ |
| 2410 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 2411 | TRUE, FALSE); |
| 2412 | if (stub_entry == NULL) |
| 2413 | { |
| 2414 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 2415 | section->owner, stub_name); |
| 2416 | return NULL; |
| 2417 | } |
| 2418 | |
| 2419 | stub_entry->stub_sec = stub_sec; |
| 2420 | stub_entry->stub_offset = 0; |
| 2421 | stub_entry->id_sec = link_sec; |
| 2422 | |
| 2423 | return stub_entry; |
| 2424 | } |
| 2425 | |
| 2426 | static bfd_boolean |
| 2427 | aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, |
| 2428 | void *in_arg ATTRIBUTE_UNUSED) |
| 2429 | { |
| 2430 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 2431 | asection *stub_sec; |
| 2432 | bfd *stub_bfd; |
| 2433 | bfd_byte *loc; |
| 2434 | bfd_vma sym_value; |
| 2435 | unsigned int template_size; |
| 2436 | const uint32_t *template; |
| 2437 | unsigned int i; |
| 2438 | |
| 2439 | /* Massage our args to the form they really have. */ |
| 2440 | stub_entry = (struct elf64_aarch64_stub_hash_entry *) gen_entry; |
| 2441 | |
| 2442 | stub_sec = stub_entry->stub_sec; |
| 2443 | |
| 2444 | /* Make a note of the offset within the stubs for this entry. */ |
| 2445 | stub_entry->stub_offset = stub_sec->size; |
| 2446 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 2447 | |
| 2448 | stub_bfd = stub_sec->owner; |
| 2449 | |
| 2450 | /* This is the address of the stub destination. */ |
| 2451 | sym_value = (stub_entry->target_value |
| 2452 | + stub_entry->target_section->output_offset |
| 2453 | + stub_entry->target_section->output_section->vma); |
| 2454 | |
| 2455 | if (stub_entry->stub_type == aarch64_stub_long_branch) |
| 2456 | { |
| 2457 | bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma |
| 2458 | + stub_sec->output_offset); |
| 2459 | |
| 2460 | /* See if we can relax the stub. */ |
| 2461 | if (aarch64_valid_for_adrp_p (sym_value, place)) |
| 2462 | stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); |
| 2463 | } |
| 2464 | |
| 2465 | switch (stub_entry->stub_type) |
| 2466 | { |
| 2467 | case aarch64_stub_adrp_branch: |
| 2468 | template = aarch64_adrp_branch_stub; |
| 2469 | template_size = sizeof (aarch64_adrp_branch_stub); |
| 2470 | break; |
| 2471 | case aarch64_stub_long_branch: |
| 2472 | template = aarch64_long_branch_stub; |
| 2473 | template_size = sizeof (aarch64_long_branch_stub); |
| 2474 | break; |
| 2475 | default: |
| 2476 | BFD_FAIL (); |
| 2477 | return FALSE; |
| 2478 | } |
| 2479 | |
| 2480 | for (i = 0; i < (template_size / sizeof template[0]); i++) |
| 2481 | { |
| 2482 | bfd_putl32 (template[i], loc); |
| 2483 | loc += 4; |
| 2484 | } |
| 2485 | |
| 2486 | template_size = (template_size + 7) & ~7; |
| 2487 | stub_sec->size += template_size; |
| 2488 | |
| 2489 | switch (stub_entry->stub_type) |
| 2490 | { |
| 2491 | case aarch64_stub_adrp_branch: |
| 2492 | if (aarch64_relocate (R_AARCH64_ADR_PREL_PG_HI21, stub_bfd, stub_sec, |
| 2493 | stub_entry->stub_offset, sym_value)) |
| 2494 | /* The stub would not have been relaxed if the offset was out |
| 2495 | of range. */ |
| 2496 | BFD_FAIL (); |
| 2497 | |
| 2498 | _bfd_final_link_relocate |
| 2499 | (elf64_aarch64_howto_from_type (R_AARCH64_ADD_ABS_LO12_NC), |
| 2500 | stub_bfd, |
| 2501 | stub_sec, |
| 2502 | stub_sec->contents, |
| 2503 | stub_entry->stub_offset + 4, |
| 2504 | sym_value, |
| 2505 | 0); |
| 2506 | break; |
| 2507 | |
| 2508 | case aarch64_stub_long_branch: |
| 2509 | /* We want the value relative to the address 12 bytes back from the |
| 2510 | value itself. */ |
| 2511 | _bfd_final_link_relocate (elf64_aarch64_howto_from_type |
| 2512 | (R_AARCH64_PREL64), stub_bfd, stub_sec, |
| 2513 | stub_sec->contents, |
| 2514 | stub_entry->stub_offset + 16, |
| 2515 | sym_value + 12, 0); |
| 2516 | break; |
| 2517 | default: |
| 2518 | break; |
| 2519 | } |
| 2520 | |
| 2521 | return TRUE; |
| 2522 | } |
| 2523 | |
| 2524 | /* As above, but don't actually build the stub. Just bump offset so |
| 2525 | we know stub section sizes. */ |
| 2526 | |
| 2527 | static bfd_boolean |
| 2528 | aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, |
| 2529 | void *in_arg ATTRIBUTE_UNUSED) |
| 2530 | { |
| 2531 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 2532 | int size; |
| 2533 | |
| 2534 | /* Massage our args to the form they really have. */ |
| 2535 | stub_entry = (struct elf64_aarch64_stub_hash_entry *) gen_entry; |
| 2536 | |
| 2537 | switch (stub_entry->stub_type) |
| 2538 | { |
| 2539 | case aarch64_stub_adrp_branch: |
| 2540 | size = sizeof (aarch64_adrp_branch_stub); |
| 2541 | break; |
| 2542 | case aarch64_stub_long_branch: |
| 2543 | size = sizeof (aarch64_long_branch_stub); |
| 2544 | break; |
| 2545 | default: |
| 2546 | BFD_FAIL (); |
| 2547 | return FALSE; |
| 2548 | break; |
| 2549 | } |
| 2550 | |
| 2551 | size = (size + 7) & ~7; |
| 2552 | stub_entry->stub_sec->size += size; |
| 2553 | return TRUE; |
| 2554 | } |
| 2555 | |
| 2556 | /* External entry points for sizing and building linker stubs. */ |
| 2557 | |
| 2558 | /* Set up various things so that we can make a list of input sections |
| 2559 | for each output section included in the link. Returns -1 on error, |
| 2560 | 0 when no stubs will be needed, and 1 on success. */ |
| 2561 | |
| 2562 | int |
| 2563 | elf64_aarch64_setup_section_lists (bfd *output_bfd, |
| 2564 | struct bfd_link_info *info) |
| 2565 | { |
| 2566 | bfd *input_bfd; |
| 2567 | unsigned int bfd_count; |
| 2568 | int top_id, top_index; |
| 2569 | asection *section; |
| 2570 | asection **input_list, **list; |
| 2571 | bfd_size_type amt; |
| 2572 | struct elf64_aarch64_link_hash_table *htab = |
| 2573 | elf64_aarch64_hash_table (info); |
| 2574 | |
| 2575 | if (!is_elf_hash_table (htab)) |
| 2576 | return 0; |
| 2577 | |
| 2578 | /* Count the number of input BFDs and find the top input section id. */ |
| 2579 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 2580 | input_bfd != NULL; input_bfd = input_bfd->link_next) |
| 2581 | { |
| 2582 | bfd_count += 1; |
| 2583 | for (section = input_bfd->sections; |
| 2584 | section != NULL; section = section->next) |
| 2585 | { |
| 2586 | if (top_id < section->id) |
| 2587 | top_id = section->id; |
| 2588 | } |
| 2589 | } |
| 2590 | htab->bfd_count = bfd_count; |
| 2591 | |
| 2592 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 2593 | htab->stub_group = bfd_zmalloc (amt); |
| 2594 | if (htab->stub_group == NULL) |
| 2595 | return -1; |
| 2596 | |
| 2597 | /* We can't use output_bfd->section_count here to find the top output |
| 2598 | section index as some sections may have been removed, and |
| 2599 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 2600 | for (section = output_bfd->sections, top_index = 0; |
| 2601 | section != NULL; section = section->next) |
| 2602 | { |
| 2603 | if (top_index < section->index) |
| 2604 | top_index = section->index; |
| 2605 | } |
| 2606 | |
| 2607 | htab->top_index = top_index; |
| 2608 | amt = sizeof (asection *) * (top_index + 1); |
| 2609 | input_list = bfd_malloc (amt); |
| 2610 | htab->input_list = input_list; |
| 2611 | if (input_list == NULL) |
| 2612 | return -1; |
| 2613 | |
| 2614 | /* For sections we aren't interested in, mark their entries with a |
| 2615 | value we can check later. */ |
| 2616 | list = input_list + top_index; |
| 2617 | do |
| 2618 | *list = bfd_abs_section_ptr; |
| 2619 | while (list-- != input_list); |
| 2620 | |
| 2621 | for (section = output_bfd->sections; |
| 2622 | section != NULL; section = section->next) |
| 2623 | { |
| 2624 | if ((section->flags & SEC_CODE) != 0) |
| 2625 | input_list[section->index] = NULL; |
| 2626 | } |
| 2627 | |
| 2628 | return 1; |
| 2629 | } |
| 2630 | |
| 2631 | /* Used by elf64_aarch64_next_input_section and group_sections. */ |
| 2632 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 2633 | |
| 2634 | /* The linker repeatedly calls this function for each input section, |
| 2635 | in the order that input sections are linked into output sections. |
| 2636 | Build lists of input sections to determine groupings between which |
| 2637 | we may insert linker stubs. */ |
| 2638 | |
| 2639 | void |
| 2640 | elf64_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) |
| 2641 | { |
| 2642 | struct elf64_aarch64_link_hash_table *htab = |
| 2643 | elf64_aarch64_hash_table (info); |
| 2644 | |
| 2645 | if (isec->output_section->index <= htab->top_index) |
| 2646 | { |
| 2647 | asection **list = htab->input_list + isec->output_section->index; |
| 2648 | |
| 2649 | if (*list != bfd_abs_section_ptr) |
| 2650 | { |
| 2651 | /* Steal the link_sec pointer for our list. */ |
| 2652 | /* This happens to make the list in reverse order, |
| 2653 | which is what we want. */ |
| 2654 | PREV_SEC (isec) = *list; |
| 2655 | *list = isec; |
| 2656 | } |
| 2657 | } |
| 2658 | } |
| 2659 | |
| 2660 | /* See whether we can group stub sections together. Grouping stub |
| 2661 | sections may result in fewer stubs. More importantly, we need to |
| 2662 | put all .init* and .fini* stubs at the beginning of the .init or |
| 2663 | .fini output sections respectively, because glibc splits the |
| 2664 | _init and _fini functions into multiple parts. Putting a stub in |
| 2665 | the middle of a function is not a good idea. */ |
| 2666 | |
| 2667 | static void |
| 2668 | group_sections (struct elf64_aarch64_link_hash_table *htab, |
| 2669 | bfd_size_type stub_group_size, |
| 2670 | bfd_boolean stubs_always_before_branch) |
| 2671 | { |
| 2672 | asection **list = htab->input_list + htab->top_index; |
| 2673 | |
| 2674 | do |
| 2675 | { |
| 2676 | asection *tail = *list; |
| 2677 | |
| 2678 | if (tail == bfd_abs_section_ptr) |
| 2679 | continue; |
| 2680 | |
| 2681 | while (tail != NULL) |
| 2682 | { |
| 2683 | asection *curr; |
| 2684 | asection *prev; |
| 2685 | bfd_size_type total; |
| 2686 | |
| 2687 | curr = tail; |
| 2688 | total = tail->size; |
| 2689 | while ((prev = PREV_SEC (curr)) != NULL |
| 2690 | && ((total += curr->output_offset - prev->output_offset) |
| 2691 | < stub_group_size)) |
| 2692 | curr = prev; |
| 2693 | |
| 2694 | /* OK, the size from the start of CURR to the end is less |
| 2695 | than stub_group_size and thus can be handled by one stub |
| 2696 | section. (Or the tail section is itself larger than |
| 2697 | stub_group_size, in which case we may be toast.) |
| 2698 | We should really be keeping track of the total size of |
| 2699 | stubs added here, as stubs contribute to the final output |
| 2700 | section size. */ |
| 2701 | do |
| 2702 | { |
| 2703 | prev = PREV_SEC (tail); |
| 2704 | /* Set up this stub group. */ |
| 2705 | htab->stub_group[tail->id].link_sec = curr; |
| 2706 | } |
| 2707 | while (tail != curr && (tail = prev) != NULL); |
| 2708 | |
| 2709 | /* But wait, there's more! Input sections up to stub_group_size |
| 2710 | bytes before the stub section can be handled by it too. */ |
| 2711 | if (!stubs_always_before_branch) |
| 2712 | { |
| 2713 | total = 0; |
| 2714 | while (prev != NULL |
| 2715 | && ((total += tail->output_offset - prev->output_offset) |
| 2716 | < stub_group_size)) |
| 2717 | { |
| 2718 | tail = prev; |
| 2719 | prev = PREV_SEC (tail); |
| 2720 | htab->stub_group[tail->id].link_sec = curr; |
| 2721 | } |
| 2722 | } |
| 2723 | tail = prev; |
| 2724 | } |
| 2725 | } |
| 2726 | while (list-- != htab->input_list); |
| 2727 | |
| 2728 | free (htab->input_list); |
| 2729 | } |
| 2730 | |
| 2731 | #undef PREV_SEC |
| 2732 | |
| 2733 | /* Determine and set the size of the stub section for a final link. |
| 2734 | |
| 2735 | The basic idea here is to examine all the relocations looking for |
| 2736 | PC-relative calls to a target that is unreachable with a "bl" |
| 2737 | instruction. */ |
| 2738 | |
| 2739 | bfd_boolean |
| 2740 | elf64_aarch64_size_stubs (bfd *output_bfd, |
| 2741 | bfd *stub_bfd, |
| 2742 | struct bfd_link_info *info, |
| 2743 | bfd_signed_vma group_size, |
| 2744 | asection * (*add_stub_section) (const char *, |
| 2745 | asection *), |
| 2746 | void (*layout_sections_again) (void)) |
| 2747 | { |
| 2748 | bfd_size_type stub_group_size; |
| 2749 | bfd_boolean stubs_always_before_branch; |
| 2750 | bfd_boolean stub_changed = 0; |
| 2751 | struct elf64_aarch64_link_hash_table *htab = elf64_aarch64_hash_table (info); |
| 2752 | |
| 2753 | /* Propagate mach to stub bfd, because it may not have been |
| 2754 | finalized when we created stub_bfd. */ |
| 2755 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), |
| 2756 | bfd_get_mach (output_bfd)); |
| 2757 | |
| 2758 | /* Stash our params away. */ |
| 2759 | htab->stub_bfd = stub_bfd; |
| 2760 | htab->add_stub_section = add_stub_section; |
| 2761 | htab->layout_sections_again = layout_sections_again; |
| 2762 | stubs_always_before_branch = group_size < 0; |
| 2763 | if (group_size < 0) |
| 2764 | stub_group_size = -group_size; |
| 2765 | else |
| 2766 | stub_group_size = group_size; |
| 2767 | |
| 2768 | if (stub_group_size == 1) |
| 2769 | { |
| 2770 | /* Default values. */ |
| 2771 | /* Aarch64 branch range is +-128MB. The value used is 1MB less. */ |
| 2772 | stub_group_size = 127 * 1024 * 1024; |
| 2773 | } |
| 2774 | |
| 2775 | group_sections (htab, stub_group_size, stubs_always_before_branch); |
| 2776 | |
| 2777 | while (1) |
| 2778 | { |
| 2779 | bfd *input_bfd; |
| 2780 | unsigned int bfd_indx; |
| 2781 | asection *stub_sec; |
| 2782 | |
| 2783 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 2784 | input_bfd != NULL; input_bfd = input_bfd->link_next, bfd_indx++) |
| 2785 | { |
| 2786 | Elf_Internal_Shdr *symtab_hdr; |
| 2787 | asection *section; |
| 2788 | Elf_Internal_Sym *local_syms = NULL; |
| 2789 | |
| 2790 | /* We'll need the symbol table in a second. */ |
| 2791 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2792 | if (symtab_hdr->sh_info == 0) |
| 2793 | continue; |
| 2794 | |
| 2795 | /* Walk over each section attached to the input bfd. */ |
| 2796 | for (section = input_bfd->sections; |
| 2797 | section != NULL; section = section->next) |
| 2798 | { |
| 2799 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 2800 | |
| 2801 | /* If there aren't any relocs, then there's nothing more |
| 2802 | to do. */ |
| 2803 | if ((section->flags & SEC_RELOC) == 0 |
| 2804 | || section->reloc_count == 0 |
| 2805 | || (section->flags & SEC_CODE) == 0) |
| 2806 | continue; |
| 2807 | |
| 2808 | /* If this section is a link-once section that will be |
| 2809 | discarded, then don't create any stubs. */ |
| 2810 | if (section->output_section == NULL |
| 2811 | || section->output_section->owner != output_bfd) |
| 2812 | continue; |
| 2813 | |
| 2814 | /* Get the relocs. */ |
| 2815 | internal_relocs |
| 2816 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
| 2817 | NULL, info->keep_memory); |
| 2818 | if (internal_relocs == NULL) |
| 2819 | goto error_ret_free_local; |
| 2820 | |
| 2821 | /* Now examine each relocation. */ |
| 2822 | irela = internal_relocs; |
| 2823 | irelaend = irela + section->reloc_count; |
| 2824 | for (; irela < irelaend; irela++) |
| 2825 | { |
| 2826 | unsigned int r_type, r_indx; |
| 2827 | enum elf64_aarch64_stub_type stub_type; |
| 2828 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 2829 | asection *sym_sec; |
| 2830 | bfd_vma sym_value; |
| 2831 | bfd_vma destination; |
| 2832 | struct elf64_aarch64_link_hash_entry *hash; |
| 2833 | const char *sym_name; |
| 2834 | char *stub_name; |
| 2835 | const asection *id_sec; |
| 2836 | unsigned char st_type; |
| 2837 | bfd_size_type len; |
| 2838 | |
| 2839 | r_type = ELF64_R_TYPE (irela->r_info); |
| 2840 | r_indx = ELF64_R_SYM (irela->r_info); |
| 2841 | |
| 2842 | if (r_type >= (unsigned int) R_AARCH64_end) |
| 2843 | { |
| 2844 | bfd_set_error (bfd_error_bad_value); |
| 2845 | error_ret_free_internal: |
| 2846 | if (elf_section_data (section)->relocs == NULL) |
| 2847 | free (internal_relocs); |
| 2848 | goto error_ret_free_local; |
| 2849 | } |
| 2850 | |
| 2851 | /* Only look for stubs on unconditional branch and |
| 2852 | branch and link instructions. */ |
| 2853 | if (r_type != (unsigned int) R_AARCH64_CALL26 |
| 2854 | && r_type != (unsigned int) R_AARCH64_JUMP26) |
| 2855 | continue; |
| 2856 | |
| 2857 | /* Now determine the call target, its name, value, |
| 2858 | section. */ |
| 2859 | sym_sec = NULL; |
| 2860 | sym_value = 0; |
| 2861 | destination = 0; |
| 2862 | hash = NULL; |
| 2863 | sym_name = NULL; |
| 2864 | if (r_indx < symtab_hdr->sh_info) |
| 2865 | { |
| 2866 | /* It's a local symbol. */ |
| 2867 | Elf_Internal_Sym *sym; |
| 2868 | Elf_Internal_Shdr *hdr; |
| 2869 | |
| 2870 | if (local_syms == NULL) |
| 2871 | { |
| 2872 | local_syms |
| 2873 | = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2874 | if (local_syms == NULL) |
| 2875 | local_syms |
| 2876 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 2877 | symtab_hdr->sh_info, 0, |
| 2878 | NULL, NULL, NULL); |
| 2879 | if (local_syms == NULL) |
| 2880 | goto error_ret_free_internal; |
| 2881 | } |
| 2882 | |
| 2883 | sym = local_syms + r_indx; |
| 2884 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| 2885 | sym_sec = hdr->bfd_section; |
| 2886 | if (!sym_sec) |
| 2887 | /* This is an undefined symbol. It can never |
| 2888 | be resolved. */ |
| 2889 | continue; |
| 2890 | |
| 2891 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 2892 | sym_value = sym->st_value; |
| 2893 | destination = (sym_value + irela->r_addend |
| 2894 | + sym_sec->output_offset |
| 2895 | + sym_sec->output_section->vma); |
| 2896 | st_type = ELF_ST_TYPE (sym->st_info); |
| 2897 | sym_name |
| 2898 | = bfd_elf_string_from_elf_section (input_bfd, |
| 2899 | symtab_hdr->sh_link, |
| 2900 | sym->st_name); |
| 2901 | } |
| 2902 | else |
| 2903 | { |
| 2904 | int e_indx; |
| 2905 | |
| 2906 | e_indx = r_indx - symtab_hdr->sh_info; |
| 2907 | hash = ((struct elf64_aarch64_link_hash_entry *) |
| 2908 | elf_sym_hashes (input_bfd)[e_indx]); |
| 2909 | |
| 2910 | while (hash->root.root.type == bfd_link_hash_indirect |
| 2911 | || hash->root.root.type == bfd_link_hash_warning) |
| 2912 | hash = ((struct elf64_aarch64_link_hash_entry *) |
| 2913 | hash->root.root.u.i.link); |
| 2914 | |
| 2915 | if (hash->root.root.type == bfd_link_hash_defined |
| 2916 | || hash->root.root.type == bfd_link_hash_defweak) |
| 2917 | { |
| 2918 | struct elf64_aarch64_link_hash_table *globals = |
| 2919 | elf64_aarch64_hash_table (info); |
| 2920 | sym_sec = hash->root.root.u.def.section; |
| 2921 | sym_value = hash->root.root.u.def.value; |
| 2922 | /* For a destination in a shared library, |
| 2923 | use the PLT stub as target address to |
| 2924 | decide whether a branch stub is |
| 2925 | needed. */ |
| 2926 | if (globals->root.splt != NULL && hash != NULL |
| 2927 | && hash->root.plt.offset != (bfd_vma) - 1) |
| 2928 | { |
| 2929 | sym_sec = globals->root.splt; |
| 2930 | sym_value = hash->root.plt.offset; |
| 2931 | if (sym_sec->output_section != NULL) |
| 2932 | destination = (sym_value |
| 2933 | + sym_sec->output_offset |
| 2934 | + |
| 2935 | sym_sec->output_section->vma); |
| 2936 | } |
| 2937 | else if (sym_sec->output_section != NULL) |
| 2938 | destination = (sym_value + irela->r_addend |
| 2939 | + sym_sec->output_offset |
| 2940 | + sym_sec->output_section->vma); |
| 2941 | } |
| 2942 | else if (hash->root.root.type == bfd_link_hash_undefined |
| 2943 | || (hash->root.root.type |
| 2944 | == bfd_link_hash_undefweak)) |
| 2945 | { |
| 2946 | /* For a shared library, use the PLT stub as |
| 2947 | target address to decide whether a long |
| 2948 | branch stub is needed. |
| 2949 | For absolute code, they cannot be handled. */ |
| 2950 | struct elf64_aarch64_link_hash_table *globals = |
| 2951 | elf64_aarch64_hash_table (info); |
| 2952 | |
| 2953 | if (globals->root.splt != NULL && hash != NULL |
| 2954 | && hash->root.plt.offset != (bfd_vma) - 1) |
| 2955 | { |
| 2956 | sym_sec = globals->root.splt; |
| 2957 | sym_value = hash->root.plt.offset; |
| 2958 | if (sym_sec->output_section != NULL) |
| 2959 | destination = (sym_value |
| 2960 | + sym_sec->output_offset |
| 2961 | + |
| 2962 | sym_sec->output_section->vma); |
| 2963 | } |
| 2964 | else |
| 2965 | continue; |
| 2966 | } |
| 2967 | else |
| 2968 | { |
| 2969 | bfd_set_error (bfd_error_bad_value); |
| 2970 | goto error_ret_free_internal; |
| 2971 | } |
| 2972 | st_type = ELF_ST_TYPE (hash->root.type); |
| 2973 | sym_name = hash->root.root.root.string; |
| 2974 | } |
| 2975 | |
| 2976 | /* Determine what (if any) linker stub is needed. */ |
| 2977 | stub_type = aarch64_type_of_stub |
| 2978 | (info, section, irela, st_type, hash, destination); |
| 2979 | if (stub_type == aarch64_stub_none) |
| 2980 | continue; |
| 2981 | |
| 2982 | /* Support for grouping stub sections. */ |
| 2983 | id_sec = htab->stub_group[section->id].link_sec; |
| 2984 | |
| 2985 | /* Get the name of this stub. */ |
| 2986 | stub_name = elf64_aarch64_stub_name (id_sec, sym_sec, hash, |
| 2987 | irela); |
| 2988 | if (!stub_name) |
| 2989 | goto error_ret_free_internal; |
| 2990 | |
| 2991 | stub_entry = |
| 2992 | aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 2993 | stub_name, FALSE, FALSE); |
| 2994 | if (stub_entry != NULL) |
| 2995 | { |
| 2996 | /* The proper stub has already been created. */ |
| 2997 | free (stub_name); |
| 2998 | continue; |
| 2999 | } |
| 3000 | |
| 3001 | stub_entry = elf64_aarch64_add_stub (stub_name, section, |
| 3002 | htab); |
| 3003 | if (stub_entry == NULL) |
| 3004 | { |
| 3005 | free (stub_name); |
| 3006 | goto error_ret_free_internal; |
| 3007 | } |
| 3008 | |
| 3009 | stub_entry->target_value = sym_value; |
| 3010 | stub_entry->target_section = sym_sec; |
| 3011 | stub_entry->stub_type = stub_type; |
| 3012 | stub_entry->h = hash; |
| 3013 | stub_entry->st_type = st_type; |
| 3014 | |
| 3015 | if (sym_name == NULL) |
| 3016 | sym_name = "unnamed"; |
| 3017 | len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name); |
| 3018 | stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); |
| 3019 | if (stub_entry->output_name == NULL) |
| 3020 | { |
| 3021 | free (stub_name); |
| 3022 | goto error_ret_free_internal; |
| 3023 | } |
| 3024 | |
| 3025 | snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, |
| 3026 | sym_name); |
| 3027 | |
| 3028 | stub_changed = TRUE; |
| 3029 | } |
| 3030 | |
| 3031 | /* We're done with the internal relocs, free them. */ |
| 3032 | if (elf_section_data (section)->relocs == NULL) |
| 3033 | free (internal_relocs); |
| 3034 | } |
| 3035 | } |
| 3036 | |
| 3037 | if (!stub_changed) |
| 3038 | break; |
| 3039 | |
| 3040 | /* OK, we've added some stubs. Find out the new size of the |
| 3041 | stub sections. */ |
| 3042 | for (stub_sec = htab->stub_bfd->sections; |
| 3043 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 3044 | stub_sec->size = 0; |
| 3045 | |
| 3046 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); |
| 3047 | |
| 3048 | /* Ask the linker to do its stuff. */ |
| 3049 | (*htab->layout_sections_again) (); |
| 3050 | stub_changed = FALSE; |
| 3051 | } |
| 3052 | |
| 3053 | return TRUE; |
| 3054 | |
| 3055 | error_ret_free_local: |
| 3056 | return FALSE; |
| 3057 | } |
| 3058 | |
| 3059 | /* Build all the stubs associated with the current output file. The |
| 3060 | stubs are kept in a hash table attached to the main linker hash |
| 3061 | table. We also set up the .plt entries for statically linked PIC |
| 3062 | functions here. This function is called via aarch64_elf_finish in the |
| 3063 | linker. */ |
| 3064 | |
| 3065 | bfd_boolean |
| 3066 | elf64_aarch64_build_stubs (struct bfd_link_info *info) |
| 3067 | { |
| 3068 | asection *stub_sec; |
| 3069 | struct bfd_hash_table *table; |
| 3070 | struct elf64_aarch64_link_hash_table *htab; |
| 3071 | |
| 3072 | htab = elf64_aarch64_hash_table (info); |
| 3073 | |
| 3074 | for (stub_sec = htab->stub_bfd->sections; |
| 3075 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 3076 | { |
| 3077 | bfd_size_type size; |
| 3078 | |
| 3079 | /* Ignore non-stub sections. */ |
| 3080 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 3081 | continue; |
| 3082 | |
| 3083 | /* Allocate memory to hold the linker stubs. */ |
| 3084 | size = stub_sec->size; |
| 3085 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| 3086 | if (stub_sec->contents == NULL && size != 0) |
| 3087 | return FALSE; |
| 3088 | stub_sec->size = 0; |
| 3089 | } |
| 3090 | |
| 3091 | /* Build the stubs as directed by the stub hash table. */ |
| 3092 | table = &htab->stub_hash_table; |
| 3093 | bfd_hash_traverse (table, aarch64_build_one_stub, info); |
| 3094 | |
| 3095 | return TRUE; |
| 3096 | } |
| 3097 | |
| 3098 | |
| 3099 | /* Add an entry to the code/data map for section SEC. */ |
| 3100 | |
| 3101 | static void |
| 3102 | elf64_aarch64_section_map_add (asection *sec, char type, bfd_vma vma) |
| 3103 | { |
| 3104 | struct _aarch64_elf_section_data *sec_data = |
| 3105 | elf64_aarch64_section_data (sec); |
| 3106 | unsigned int newidx; |
| 3107 | |
| 3108 | if (sec_data->map == NULL) |
| 3109 | { |
| 3110 | sec_data->map = bfd_malloc (sizeof (elf64_aarch64_section_map)); |
| 3111 | sec_data->mapcount = 0; |
| 3112 | sec_data->mapsize = 1; |
| 3113 | } |
| 3114 | |
| 3115 | newidx = sec_data->mapcount++; |
| 3116 | |
| 3117 | if (sec_data->mapcount > sec_data->mapsize) |
| 3118 | { |
| 3119 | sec_data->mapsize *= 2; |
| 3120 | sec_data->map = bfd_realloc_or_free |
| 3121 | (sec_data->map, sec_data->mapsize * sizeof (elf64_aarch64_section_map)); |
| 3122 | } |
| 3123 | |
| 3124 | if (sec_data->map) |
| 3125 | { |
| 3126 | sec_data->map[newidx].vma = vma; |
| 3127 | sec_data->map[newidx].type = type; |
| 3128 | } |
| 3129 | } |
| 3130 | |
| 3131 | |
| 3132 | /* Initialise maps of insn/data for input BFDs. */ |
| 3133 | void |
| 3134 | bfd_elf64_aarch64_init_maps (bfd *abfd) |
| 3135 | { |
| 3136 | Elf_Internal_Sym *isymbuf; |
| 3137 | Elf_Internal_Shdr *hdr; |
| 3138 | unsigned int i, localsyms; |
| 3139 | |
| 3140 | /* Make sure that we are dealing with an AArch64 elf binary. */ |
| 3141 | if (!is_aarch64_elf (abfd)) |
| 3142 | return; |
| 3143 | |
| 3144 | if ((abfd->flags & DYNAMIC) != 0) |
| 3145 | return; |
| 3146 | |
| 3147 | hdr = &elf_symtab_hdr (abfd); |
| 3148 | localsyms = hdr->sh_info; |
| 3149 | |
| 3150 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field |
| 3151 | should contain the number of local symbols, which should come before any |
| 3152 | global symbols. Mapping symbols are always local. */ |
| 3153 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); |
| 3154 | |
| 3155 | /* No internal symbols read? Skip this BFD. */ |
| 3156 | if (isymbuf == NULL) |
| 3157 | return; |
| 3158 | |
| 3159 | for (i = 0; i < localsyms; i++) |
| 3160 | { |
| 3161 | Elf_Internal_Sym *isym = &isymbuf[i]; |
| 3162 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3163 | const char *name; |
| 3164 | |
| 3165 | if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) |
| 3166 | { |
| 3167 | name = bfd_elf_string_from_elf_section (abfd, |
| 3168 | hdr->sh_link, |
| 3169 | isym->st_name); |
| 3170 | |
| 3171 | if (bfd_is_aarch64_special_symbol_name |
| 3172 | (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) |
| 3173 | elf64_aarch64_section_map_add (sec, name[1], isym->st_value); |
| 3174 | } |
| 3175 | } |
| 3176 | } |
| 3177 | |
| 3178 | /* Set option values needed during linking. */ |
| 3179 | void |
| 3180 | bfd_elf64_aarch64_set_options (struct bfd *output_bfd, |
| 3181 | struct bfd_link_info *link_info, |
| 3182 | int no_enum_warn, |
| 3183 | int no_wchar_warn, int pic_veneer) |
| 3184 | { |
| 3185 | struct elf64_aarch64_link_hash_table *globals; |
| 3186 | |
| 3187 | globals = elf64_aarch64_hash_table (link_info); |
| 3188 | globals->pic_veneer = pic_veneer; |
| 3189 | |
| 3190 | BFD_ASSERT (is_aarch64_elf (output_bfd)); |
| 3191 | elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; |
| 3192 | elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; |
| 3193 | } |
| 3194 | |
| 3195 | #define MASK(n) ((1u << (n)) - 1) |
| 3196 | |
| 3197 | /* Decode the 26-bit offset of unconditional branch. */ |
| 3198 | static inline uint32_t |
| 3199 | decode_branch_ofs_26 (uint32_t insn) |
| 3200 | { |
| 3201 | return insn & MASK (26); |
| 3202 | } |
| 3203 | |
| 3204 | /* Decode the 19-bit offset of conditional branch and compare & branch. */ |
| 3205 | static inline uint32_t |
| 3206 | decode_cond_branch_ofs_19 (uint32_t insn) |
| 3207 | { |
| 3208 | return (insn >> 5) & MASK (19); |
| 3209 | } |
| 3210 | |
| 3211 | /* Decode the 19-bit offset of load literal. */ |
| 3212 | static inline uint32_t |
| 3213 | decode_ld_lit_ofs_19 (uint32_t insn) |
| 3214 | { |
| 3215 | return (insn >> 5) & MASK (19); |
| 3216 | } |
| 3217 | |
| 3218 | /* Decode the 14-bit offset of test & branch. */ |
| 3219 | static inline uint32_t |
| 3220 | decode_tst_branch_ofs_14 (uint32_t insn) |
| 3221 | { |
| 3222 | return (insn >> 5) & MASK (14); |
| 3223 | } |
| 3224 | |
| 3225 | /* Decode the 16-bit imm of move wide. */ |
| 3226 | static inline uint32_t |
| 3227 | decode_movw_imm (uint32_t insn) |
| 3228 | { |
| 3229 | return (insn >> 5) & MASK (16); |
| 3230 | } |
| 3231 | |
| 3232 | /* Decode the 21-bit imm of adr. */ |
| 3233 | static inline uint32_t |
| 3234 | decode_adr_imm (uint32_t insn) |
| 3235 | { |
| 3236 | return ((insn >> 29) & MASK (2)) | ((insn >> 3) & (MASK (19) << 2)); |
| 3237 | } |
| 3238 | |
| 3239 | /* Decode the 12-bit imm of add immediate. */ |
| 3240 | static inline uint32_t |
| 3241 | decode_add_imm (uint32_t insn) |
| 3242 | { |
| 3243 | return (insn >> 10) & MASK (12); |
| 3244 | } |
| 3245 | |
| 3246 | |
| 3247 | /* Encode the 26-bit offset of unconditional branch. */ |
| 3248 | static inline uint32_t |
| 3249 | reencode_branch_ofs_26 (uint32_t insn, uint32_t ofs) |
| 3250 | { |
| 3251 | return (insn & ~MASK (26)) | (ofs & MASK (26)); |
| 3252 | } |
| 3253 | |
| 3254 | /* Encode the 19-bit offset of conditional branch and compare & branch. */ |
| 3255 | static inline uint32_t |
| 3256 | reencode_cond_branch_ofs_19 (uint32_t insn, uint32_t ofs) |
| 3257 | { |
| 3258 | return (insn & ~(MASK (19) << 5)) | ((ofs & MASK (19)) << 5); |
| 3259 | } |
| 3260 | |
| 3261 | /* Decode the 19-bit offset of load literal. */ |
| 3262 | static inline uint32_t |
| 3263 | reencode_ld_lit_ofs_19 (uint32_t insn, uint32_t ofs) |
| 3264 | { |
| 3265 | return (insn & ~(MASK (19) << 5)) | ((ofs & MASK (19)) << 5); |
| 3266 | } |
| 3267 | |
| 3268 | /* Encode the 14-bit offset of test & branch. */ |
| 3269 | static inline uint32_t |
| 3270 | reencode_tst_branch_ofs_14 (uint32_t insn, uint32_t ofs) |
| 3271 | { |
| 3272 | return (insn & ~(MASK (14) << 5)) | ((ofs & MASK (14)) << 5); |
| 3273 | } |
| 3274 | |
| 3275 | /* Reencode the imm field of move wide. */ |
| 3276 | static inline uint32_t |
| 3277 | reencode_movw_imm (uint32_t insn, uint32_t imm) |
| 3278 | { |
| 3279 | return (insn & ~(MASK (16) << 5)) | ((imm & MASK (16)) << 5); |
| 3280 | } |
| 3281 | |
| 3282 | /* Reencode the imm field of adr. */ |
| 3283 | static inline uint32_t |
| 3284 | reencode_adr_imm (uint32_t insn, uint32_t imm) |
| 3285 | { |
| 3286 | return (insn & ~((MASK (2) << 29) | (MASK (19) << 5))) |
| 3287 | | ((imm & MASK (2)) << 29) | ((imm & (MASK (19) << 2)) << 3); |
| 3288 | } |
| 3289 | |
| 3290 | /* Reencode the imm field of ld/st pos immediate. */ |
| 3291 | static inline uint32_t |
| 3292 | reencode_ldst_pos_imm (uint32_t insn, uint32_t imm) |
| 3293 | { |
| 3294 | return (insn & ~(MASK (12) << 10)) | ((imm & MASK (12)) << 10); |
| 3295 | } |
| 3296 | |
| 3297 | /* Reencode the imm field of add immediate. */ |
| 3298 | static inline uint32_t |
| 3299 | reencode_add_imm (uint32_t insn, uint32_t imm) |
| 3300 | { |
| 3301 | return (insn & ~(MASK (12) << 10)) | ((imm & MASK (12)) << 10); |
| 3302 | } |
| 3303 | |
| 3304 | /* Reencode mov[zn] to movz. */ |
| 3305 | static inline uint32_t |
| 3306 | reencode_movzn_to_movz (uint32_t opcode) |
| 3307 | { |
| 3308 | return opcode | (1 << 30); |
| 3309 | } |
| 3310 | |
| 3311 | /* Reencode mov[zn] to movn. */ |
| 3312 | static inline uint32_t |
| 3313 | reencode_movzn_to_movn (uint32_t opcode) |
| 3314 | { |
| 3315 | return opcode & ~(1 << 30); |
| 3316 | } |
| 3317 | |
| 3318 | /* Insert the addend/value into the instruction or data object being |
| 3319 | relocated. */ |
| 3320 | static bfd_reloc_status_type |
| 3321 | bfd_elf_aarch64_put_addend (bfd *abfd, |
| 3322 | bfd_byte *address, |
| 3323 | reloc_howto_type *howto, bfd_signed_vma addend) |
| 3324 | { |
| 3325 | bfd_reloc_status_type status = bfd_reloc_ok; |
| 3326 | bfd_signed_vma old_addend = addend; |
| 3327 | bfd_vma contents; |
| 3328 | int size; |
| 3329 | |
| 3330 | size = bfd_get_reloc_size (howto); |
| 3331 | switch (size) |
| 3332 | { |
| 3333 | case 2: |
| 3334 | contents = bfd_get_16 (abfd, address); |
| 3335 | break; |
| 3336 | case 4: |
| 3337 | if (howto->src_mask != 0xffffffff) |
| 3338 | /* Must be 32-bit instruction, always little-endian. */ |
| 3339 | contents = bfd_getl32 (address); |
| 3340 | else |
| 3341 | /* Must be 32-bit data (endianness dependent). */ |
| 3342 | contents = bfd_get_32 (abfd, address); |
| 3343 | break; |
| 3344 | case 8: |
| 3345 | contents = bfd_get_64 (abfd, address); |
| 3346 | break; |
| 3347 | default: |
| 3348 | abort (); |
| 3349 | } |
| 3350 | |
| 3351 | switch (howto->complain_on_overflow) |
| 3352 | { |
| 3353 | case complain_overflow_dont: |
| 3354 | break; |
| 3355 | case complain_overflow_signed: |
| 3356 | status = aarch64_signed_overflow (addend, |
| 3357 | howto->bitsize + howto->rightshift); |
| 3358 | break; |
| 3359 | case complain_overflow_unsigned: |
| 3360 | status = aarch64_unsigned_overflow (addend, |
| 3361 | howto->bitsize + howto->rightshift); |
| 3362 | break; |
| 3363 | case complain_overflow_bitfield: |
| 3364 | default: |
| 3365 | abort (); |
| 3366 | } |
| 3367 | |
| 3368 | addend >>= howto->rightshift; |
| 3369 | |
| 3370 | switch (howto->type) |
| 3371 | { |
| 3372 | case R_AARCH64_JUMP26: |
| 3373 | case R_AARCH64_CALL26: |
| 3374 | contents = reencode_branch_ofs_26 (contents, addend); |
| 3375 | break; |
| 3376 | |
| 3377 | case R_AARCH64_CONDBR19: |
| 3378 | contents = reencode_cond_branch_ofs_19 (contents, addend); |
| 3379 | break; |
| 3380 | |
| 3381 | case R_AARCH64_TSTBR14: |
| 3382 | contents = reencode_tst_branch_ofs_14 (contents, addend); |
| 3383 | break; |
| 3384 | |
| 3385 | case R_AARCH64_LD_PREL_LO19: |
| 3386 | case R_AARCH64_GOT_LD_PREL19: |
| 3387 | if (old_addend & ((1 << howto->rightshift) - 1)) |
| 3388 | return bfd_reloc_overflow; |
| 3389 | contents = reencode_ld_lit_ofs_19 (contents, addend); |
| 3390 | break; |
| 3391 | |
| 3392 | case R_AARCH64_TLSDESC_CALL: |
| 3393 | break; |
| 3394 | |
| 3395 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 3396 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 3397 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 3398 | case R_AARCH64_ADR_GOT_PAGE: |
| 3399 | case R_AARCH64_ADR_PREL_LO21: |
| 3400 | case R_AARCH64_ADR_PREL_PG_HI21: |
| 3401 | case R_AARCH64_ADR_PREL_PG_HI21_NC: |
| 3402 | contents = reencode_adr_imm (contents, addend); |
| 3403 | break; |
| 3404 | |
| 3405 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 3406 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 3407 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 3408 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 3409 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 3410 | case R_AARCH64_ADD_ABS_LO12_NC: |
| 3411 | /* Corresponds to: add rd, rn, #uimm12 to provide the low order |
| 3412 | 12 bits of the page offset following |
| 3413 | R_AARCH64_ADR_PREL_PG_HI21 which computes the |
| 3414 | (pc-relative) page base. */ |
| 3415 | contents = reencode_add_imm (contents, addend); |
| 3416 | break; |
| 3417 | |
| 3418 | case R_AARCH64_LDST8_ABS_LO12_NC: |
| 3419 | case R_AARCH64_LDST16_ABS_LO12_NC: |
| 3420 | case R_AARCH64_LDST32_ABS_LO12_NC: |
| 3421 | case R_AARCH64_LDST64_ABS_LO12_NC: |
| 3422 | case R_AARCH64_LDST128_ABS_LO12_NC: |
| 3423 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 3424 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 3425 | case R_AARCH64_LD64_GOT_LO12_NC: |
| 3426 | if (old_addend & ((1 << howto->rightshift) - 1)) |
| 3427 | return bfd_reloc_overflow; |
| 3428 | /* Used for ldr*|str* rt, [rn, #uimm12] to provide the low order |
| 3429 | 12 bits of the page offset following R_AARCH64_ADR_PREL_PG_HI21 |
| 3430 | which computes the (pc-relative) page base. */ |
| 3431 | contents = reencode_ldst_pos_imm (contents, addend); |
| 3432 | break; |
| 3433 | |
| 3434 | /* Group relocations to create high bits of a 16, 32, 48 or 64 |
| 3435 | bit signed data or abs address inline. Will change |
| 3436 | instruction to MOVN or MOVZ depending on sign of calculated |
| 3437 | value. */ |
| 3438 | |
| 3439 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 3440 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 3441 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 3442 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 3443 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 3444 | case R_AARCH64_MOVW_SABS_G0: |
| 3445 | case R_AARCH64_MOVW_SABS_G1: |
| 3446 | case R_AARCH64_MOVW_SABS_G2: |
| 3447 | /* NOTE: We can only come here with movz or movn. */ |
| 3448 | if (addend < 0) |
| 3449 | { |
| 3450 | /* Force use of MOVN. */ |
| 3451 | addend = ~addend; |
| 3452 | contents = reencode_movzn_to_movn (contents); |
| 3453 | } |
| 3454 | else |
| 3455 | { |
| 3456 | /* Force use of MOVZ. */ |
| 3457 | contents = reencode_movzn_to_movz (contents); |
| 3458 | } |
| 3459 | /* fall through */ |
| 3460 | |
| 3461 | /* Group relocations to create a 16, 32, 48 or 64 bit unsigned |
| 3462 | data or abs address inline. */ |
| 3463 | |
| 3464 | case R_AARCH64_MOVW_UABS_G0: |
| 3465 | case R_AARCH64_MOVW_UABS_G0_NC: |
| 3466 | case R_AARCH64_MOVW_UABS_G1: |
| 3467 | case R_AARCH64_MOVW_UABS_G1_NC: |
| 3468 | case R_AARCH64_MOVW_UABS_G2: |
| 3469 | case R_AARCH64_MOVW_UABS_G2_NC: |
| 3470 | case R_AARCH64_MOVW_UABS_G3: |
| 3471 | contents = reencode_movw_imm (contents, addend); |
| 3472 | break; |
| 3473 | |
| 3474 | default: |
| 3475 | /* Repack simple data */ |
| 3476 | if (howto->dst_mask & (howto->dst_mask + 1)) |
| 3477 | return bfd_reloc_notsupported; |
| 3478 | |
| 3479 | contents = ((contents & ~howto->dst_mask) | (addend & howto->dst_mask)); |
| 3480 | break; |
| 3481 | } |
| 3482 | |
| 3483 | switch (size) |
| 3484 | { |
| 3485 | case 2: |
| 3486 | bfd_put_16 (abfd, contents, address); |
| 3487 | break; |
| 3488 | case 4: |
| 3489 | if (howto->dst_mask != 0xffffffff) |
| 3490 | /* must be 32-bit instruction, always little-endian */ |
| 3491 | bfd_putl32 (contents, address); |
| 3492 | else |
| 3493 | /* must be 32-bit data (endianness dependent) */ |
| 3494 | bfd_put_32 (abfd, contents, address); |
| 3495 | break; |
| 3496 | case 8: |
| 3497 | bfd_put_64 (abfd, contents, address); |
| 3498 | break; |
| 3499 | default: |
| 3500 | abort (); |
| 3501 | } |
| 3502 | |
| 3503 | return status; |
| 3504 | } |
| 3505 | |
| 3506 | static bfd_vma |
| 3507 | aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, |
| 3508 | struct elf64_aarch64_link_hash_table |
| 3509 | *globals, struct bfd_link_info *info, |
| 3510 | bfd_vma value, bfd *output_bfd, |
| 3511 | bfd_boolean *unresolved_reloc_p) |
| 3512 | { |
| 3513 | bfd_vma off = (bfd_vma) - 1; |
| 3514 | asection *basegot = globals->root.sgot; |
| 3515 | bfd_boolean dyn = globals->root.dynamic_sections_created; |
| 3516 | |
| 3517 | if (h != NULL) |
| 3518 | { |
| 3519 | off = h->got.offset; |
| 3520 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 3521 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3522 | || (info->shared |
| 3523 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3524 | || (ELF_ST_VISIBILITY (h->other) |
| 3525 | && h->root.type == bfd_link_hash_undefweak)) |
| 3526 | { |
| 3527 | /* This is actually a static link, or it is a -Bsymbolic link |
| 3528 | and the symbol is defined locally. We must initialize this |
| 3529 | entry in the global offset table. Since the offset must |
| 3530 | always be a multiple of 8, we use the least significant bit |
| 3531 | to record whether we have initialized it already. |
| 3532 | When doing a dynamic link, we create a .rel(a).got relocation |
| 3533 | entry to initialize the value. This is done in the |
| 3534 | finish_dynamic_symbol routine. */ |
| 3535 | if ((off & 1) != 0) |
| 3536 | off &= ~1; |
| 3537 | else |
| 3538 | { |
| 3539 | bfd_put_64 (output_bfd, value, basegot->contents + off); |
| 3540 | h->got.offset |= 1; |
| 3541 | } |
| 3542 | } |
| 3543 | else |
| 3544 | *unresolved_reloc_p = FALSE; |
| 3545 | |
| 3546 | off = off + basegot->output_section->vma + basegot->output_offset; |
| 3547 | } |
| 3548 | |
| 3549 | return off; |
| 3550 | } |
| 3551 | |
| 3552 | /* Change R_TYPE to a more efficient access model where possible, |
| 3553 | return the new reloc type. */ |
| 3554 | |
| 3555 | static unsigned int |
| 3556 | aarch64_tls_transition_without_check (unsigned int r_type, |
| 3557 | struct elf_link_hash_entry *h) |
| 3558 | { |
| 3559 | bfd_boolean is_local = h == NULL; |
| 3560 | switch (r_type) |
| 3561 | { |
| 3562 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 3563 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 3564 | return is_local |
| 3565 | ? R_AARCH64_TLSLE_MOVW_TPREL_G1 : R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21; |
| 3566 | |
| 3567 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 3568 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 3569 | return is_local |
| 3570 | ? R_AARCH64_TLSLE_MOVW_TPREL_G0_NC |
| 3571 | : R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC; |
| 3572 | |
| 3573 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 3574 | return is_local ? R_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; |
| 3575 | |
| 3576 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 3577 | return is_local ? R_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; |
| 3578 | |
| 3579 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 3580 | case R_AARCH64_TLSDESC_CALL: |
| 3581 | /* Instructions with these relocations will become NOPs. */ |
| 3582 | return R_AARCH64_NONE; |
| 3583 | } |
| 3584 | |
| 3585 | return r_type; |
| 3586 | } |
| 3587 | |
| 3588 | static unsigned int |
| 3589 | aarch64_reloc_got_type (unsigned int r_type) |
| 3590 | { |
| 3591 | switch (r_type) |
| 3592 | { |
| 3593 | case R_AARCH64_LD64_GOT_LO12_NC: |
| 3594 | case R_AARCH64_ADR_GOT_PAGE: |
| 3595 | case R_AARCH64_GOT_LD_PREL19: |
| 3596 | return GOT_NORMAL; |
| 3597 | |
| 3598 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 3599 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 3600 | return GOT_TLS_GD; |
| 3601 | |
| 3602 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 3603 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 3604 | case R_AARCH64_TLSDESC_CALL: |
| 3605 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 3606 | return GOT_TLSDESC_GD; |
| 3607 | |
| 3608 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 3609 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 3610 | return GOT_TLS_IE; |
| 3611 | |
| 3612 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 3613 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 3614 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 3615 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 3616 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 3617 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 3618 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 3619 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 3620 | return GOT_UNKNOWN; |
| 3621 | } |
| 3622 | return GOT_UNKNOWN; |
| 3623 | } |
| 3624 | |
| 3625 | static bfd_boolean |
| 3626 | aarch64_can_relax_tls (bfd *input_bfd, |
| 3627 | struct bfd_link_info *info, |
| 3628 | unsigned int r_type, |
| 3629 | struct elf_link_hash_entry *h, |
| 3630 | unsigned long r_symndx) |
| 3631 | { |
| 3632 | unsigned int symbol_got_type; |
| 3633 | unsigned int reloc_got_type; |
| 3634 | |
| 3635 | if (! IS_AARCH64_TLS_RELOC (r_type)) |
| 3636 | return FALSE; |
| 3637 | |
| 3638 | symbol_got_type = elf64_aarch64_symbol_got_type (h, input_bfd, r_symndx); |
| 3639 | reloc_got_type = aarch64_reloc_got_type (r_type); |
| 3640 | |
| 3641 | if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) |
| 3642 | return TRUE; |
| 3643 | |
| 3644 | if (info->shared) |
| 3645 | return FALSE; |
| 3646 | |
| 3647 | if (h && h->root.type == bfd_link_hash_undefweak) |
| 3648 | return FALSE; |
| 3649 | |
| 3650 | return TRUE; |
| 3651 | } |
| 3652 | |
| 3653 | static unsigned int |
| 3654 | aarch64_tls_transition (bfd *input_bfd, |
| 3655 | struct bfd_link_info *info, |
| 3656 | unsigned int r_type, |
| 3657 | struct elf_link_hash_entry *h, |
| 3658 | unsigned long r_symndx) |
| 3659 | { |
| 3660 | if (! aarch64_can_relax_tls (input_bfd, info, r_type, h, r_symndx)) |
| 3661 | return r_type; |
| 3662 | |
| 3663 | return aarch64_tls_transition_without_check (r_type, h); |
| 3664 | } |
| 3665 | |
| 3666 | /* Return the base VMA address which should be subtracted from real addresses |
| 3667 | when resolving R_AARCH64_TLS_DTPREL64 relocation. */ |
| 3668 | |
| 3669 | static bfd_vma |
| 3670 | dtpoff_base (struct bfd_link_info *info) |
| 3671 | { |
| 3672 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 3673 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 3674 | return elf_hash_table (info)->tls_sec->vma; |
| 3675 | } |
| 3676 | |
| 3677 | |
| 3678 | /* Return the base VMA address which should be subtracted from real addresses |
| 3679 | when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ |
| 3680 | |
| 3681 | static bfd_vma |
| 3682 | tpoff_base (struct bfd_link_info *info) |
| 3683 | { |
| 3684 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 3685 | |
| 3686 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 3687 | if (htab->tls_sec == NULL) |
| 3688 | return 0; |
| 3689 | |
| 3690 | bfd_vma base = align_power ((bfd_vma) TCB_SIZE, |
| 3691 | htab->tls_sec->alignment_power); |
| 3692 | return htab->tls_sec->vma - base; |
| 3693 | } |
| 3694 | |
| 3695 | static bfd_vma * |
| 3696 | symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3697 | unsigned long r_symndx) |
| 3698 | { |
| 3699 | /* Calculate the address of the GOT entry for symbol |
| 3700 | referred to in h. */ |
| 3701 | if (h != NULL) |
| 3702 | return &h->got.offset; |
| 3703 | else |
| 3704 | { |
| 3705 | /* local symbol */ |
| 3706 | struct elf_aarch64_local_symbol *l; |
| 3707 | |
| 3708 | l = elf64_aarch64_locals (input_bfd); |
| 3709 | return &l[r_symndx].got_offset; |
| 3710 | } |
| 3711 | } |
| 3712 | |
| 3713 | static void |
| 3714 | symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3715 | unsigned long r_symndx) |
| 3716 | { |
| 3717 | bfd_vma *p; |
| 3718 | p = symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 3719 | *p |= 1; |
| 3720 | } |
| 3721 | |
| 3722 | static int |
| 3723 | symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3724 | unsigned long r_symndx) |
| 3725 | { |
| 3726 | bfd_vma value; |
| 3727 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 3728 | return value & 1; |
| 3729 | } |
| 3730 | |
| 3731 | static bfd_vma |
| 3732 | symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3733 | unsigned long r_symndx) |
| 3734 | { |
| 3735 | bfd_vma value; |
| 3736 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 3737 | value &= ~1; |
| 3738 | return value; |
| 3739 | } |
| 3740 | |
| 3741 | static bfd_vma * |
| 3742 | symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3743 | unsigned long r_symndx) |
| 3744 | { |
| 3745 | /* Calculate the address of the GOT entry for symbol |
| 3746 | referred to in h. */ |
| 3747 | if (h != NULL) |
| 3748 | { |
| 3749 | struct elf64_aarch64_link_hash_entry *eh; |
| 3750 | eh = (struct elf64_aarch64_link_hash_entry *) h; |
| 3751 | return &eh->tlsdesc_got_jump_table_offset; |
| 3752 | } |
| 3753 | else |
| 3754 | { |
| 3755 | /* local symbol */ |
| 3756 | struct elf_aarch64_local_symbol *l; |
| 3757 | |
| 3758 | l = elf64_aarch64_locals (input_bfd); |
| 3759 | return &l[r_symndx].tlsdesc_got_jump_table_offset; |
| 3760 | } |
| 3761 | } |
| 3762 | |
| 3763 | static void |
| 3764 | symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3765 | unsigned long r_symndx) |
| 3766 | { |
| 3767 | bfd_vma *p; |
| 3768 | p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 3769 | *p |= 1; |
| 3770 | } |
| 3771 | |
| 3772 | static int |
| 3773 | symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, |
| 3774 | struct elf_link_hash_entry *h, |
| 3775 | unsigned long r_symndx) |
| 3776 | { |
| 3777 | bfd_vma value; |
| 3778 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 3779 | return value & 1; |
| 3780 | } |
| 3781 | |
| 3782 | static bfd_vma |
| 3783 | symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3784 | unsigned long r_symndx) |
| 3785 | { |
| 3786 | bfd_vma value; |
| 3787 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 3788 | value &= ~1; |
| 3789 | return value; |
| 3790 | } |
| 3791 | |
| 3792 | /* Perform a relocation as part of a final link. */ |
| 3793 | static bfd_reloc_status_type |
| 3794 | elf64_aarch64_final_link_relocate (reloc_howto_type *howto, |
| 3795 | bfd *input_bfd, |
| 3796 | bfd *output_bfd, |
| 3797 | asection *input_section, |
| 3798 | bfd_byte *contents, |
| 3799 | Elf_Internal_Rela *rel, |
| 3800 | bfd_vma value, |
| 3801 | struct bfd_link_info *info, |
| 3802 | asection *sym_sec, |
| 3803 | struct elf_link_hash_entry *h, |
| 3804 | bfd_boolean *unresolved_reloc_p, |
| 3805 | bfd_boolean save_addend, |
| 3806 | bfd_vma *saved_addend) |
| 3807 | { |
| 3808 | unsigned int r_type = howto->type; |
| 3809 | unsigned long r_symndx; |
| 3810 | bfd_byte *hit_data = contents + rel->r_offset; |
| 3811 | bfd_vma place; |
| 3812 | bfd_signed_vma signed_addend; |
| 3813 | struct elf64_aarch64_link_hash_table *globals; |
| 3814 | bfd_boolean weak_undef_p; |
| 3815 | |
| 3816 | globals = elf64_aarch64_hash_table (info); |
| 3817 | |
| 3818 | BFD_ASSERT (is_aarch64_elf (input_bfd)); |
| 3819 | |
| 3820 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 3821 | |
| 3822 | /* It is possible to have linker relaxations on some TLS access |
| 3823 | models. Update our information here. */ |
| 3824 | r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx); |
| 3825 | |
| 3826 | if (r_type != howto->type) |
| 3827 | howto = elf64_aarch64_howto_from_type (r_type); |
| 3828 | |
| 3829 | place = input_section->output_section->vma |
| 3830 | + input_section->output_offset + rel->r_offset; |
| 3831 | |
| 3832 | /* Get addend, accumulating the addend for consecutive relocs |
| 3833 | which refer to the same offset. */ |
| 3834 | signed_addend = saved_addend ? *saved_addend : 0; |
| 3835 | signed_addend += rel->r_addend; |
| 3836 | |
| 3837 | weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak |
| 3838 | : bfd_is_und_section (sym_sec)); |
| 3839 | switch (r_type) |
| 3840 | { |
| 3841 | case R_AARCH64_NONE: |
| 3842 | case R_AARCH64_NULL: |
| 3843 | case R_AARCH64_TLSDESC_CALL: |
| 3844 | *unresolved_reloc_p = FALSE; |
| 3845 | return bfd_reloc_ok; |
| 3846 | |
| 3847 | case R_AARCH64_ABS64: |
| 3848 | |
| 3849 | /* When generating a shared object or relocatable executable, these |
| 3850 | relocations are copied into the output file to be resolved at |
| 3851 | run time. */ |
| 3852 | if (((info->shared == TRUE) || globals->root.is_relocatable_executable) |
| 3853 | && (input_section->flags & SEC_ALLOC) |
| 3854 | && (h == NULL |
| 3855 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3856 | || h->root.type != bfd_link_hash_undefweak)) |
| 3857 | { |
| 3858 | Elf_Internal_Rela outrel; |
| 3859 | bfd_byte *loc; |
| 3860 | bfd_boolean skip, relocate; |
| 3861 | asection *sreloc; |
| 3862 | |
| 3863 | *unresolved_reloc_p = FALSE; |
| 3864 | |
| 3865 | sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, |
| 3866 | input_section, 1); |
| 3867 | if (sreloc == NULL) |
| 3868 | return bfd_reloc_notsupported; |
| 3869 | |
| 3870 | skip = FALSE; |
| 3871 | relocate = FALSE; |
| 3872 | |
| 3873 | outrel.r_addend = signed_addend; |
| 3874 | outrel.r_offset = |
| 3875 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 3876 | rel->r_offset); |
| 3877 | if (outrel.r_offset == (bfd_vma) - 1) |
| 3878 | skip = TRUE; |
| 3879 | else if (outrel.r_offset == (bfd_vma) - 2) |
| 3880 | { |
| 3881 | skip = TRUE; |
| 3882 | relocate = TRUE; |
| 3883 | } |
| 3884 | |
| 3885 | outrel.r_offset += (input_section->output_section->vma |
| 3886 | + input_section->output_offset); |
| 3887 | |
| 3888 | if (skip) |
| 3889 | memset (&outrel, 0, sizeof outrel); |
| 3890 | else if (h != NULL |
| 3891 | && h->dynindx != -1 |
| 3892 | && (!info->shared || !info->symbolic || !h->def_regular)) |
| 3893 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| 3894 | else |
| 3895 | { |
| 3896 | int symbol; |
| 3897 | |
| 3898 | /* On SVR4-ish systems, the dynamic loader cannot |
| 3899 | relocate the text and data segments independently, |
| 3900 | so the symbol does not matter. */ |
| 3901 | symbol = 0; |
| 3902 | outrel.r_info = ELF64_R_INFO (symbol, R_AARCH64_RELATIVE); |
| 3903 | outrel.r_addend += value; |
| 3904 | } |
| 3905 | |
| 3906 | loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (htab); |
| 3907 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 3908 | |
| 3909 | if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size) |
| 3910 | { |
| 3911 | /* Sanity to check that we have previously allocated |
| 3912 | sufficient space in the relocation section for the |
| 3913 | number of relocations we actually want to emit. */ |
| 3914 | abort (); |
| 3915 | } |
| 3916 | |
| 3917 | /* If this reloc is against an external symbol, we do not want to |
| 3918 | fiddle with the addend. Otherwise, we need to include the symbol |
| 3919 | value so that it becomes an addend for the dynamic reloc. */ |
| 3920 | if (!relocate) |
| 3921 | return bfd_reloc_ok; |
| 3922 | |
| 3923 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3924 | contents, rel->r_offset, value, |
| 3925 | signed_addend); |
| 3926 | } |
| 3927 | else |
| 3928 | value += signed_addend; |
| 3929 | break; |
| 3930 | |
| 3931 | case R_AARCH64_JUMP26: |
| 3932 | case R_AARCH64_CALL26: |
| 3933 | { |
| 3934 | asection *splt = globals->root.splt; |
| 3935 | bfd_boolean via_plt_p = |
| 3936 | splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; |
| 3937 | |
| 3938 | /* A call to an undefined weak symbol is converted to a jump to |
| 3939 | the next instruction unless a PLT entry will be created. |
| 3940 | The jump to the next instruction is optimized as a NOP. |
| 3941 | Do the same for local undefined symbols. */ |
| 3942 | if (weak_undef_p && ! via_plt_p) |
| 3943 | { |
| 3944 | bfd_putl32 (INSN_NOP, hit_data); |
| 3945 | return bfd_reloc_ok; |
| 3946 | } |
| 3947 | |
| 3948 | /* If the call goes through a PLT entry, make sure to |
| 3949 | check distance to the right destination address. */ |
| 3950 | if (via_plt_p) |
| 3951 | { |
| 3952 | value = (splt->output_section->vma |
| 3953 | + splt->output_offset + h->plt.offset); |
| 3954 | *unresolved_reloc_p = FALSE; |
| 3955 | } |
| 3956 | |
| 3957 | /* If the target symbol is global and marked as a function the |
| 3958 | relocation applies a function call or a tail call. In this |
| 3959 | situation we can veneer out of range branches. The veneers |
| 3960 | use IP0 and IP1 hence cannot be used arbitrary out of range |
| 3961 | branches that occur within the body of a function. */ |
| 3962 | if (h && h->type == STT_FUNC) |
| 3963 | { |
| 3964 | /* Check if a stub has to be inserted because the destination |
| 3965 | is too far away. */ |
| 3966 | if (! aarch64_valid_branch_p (value, place)) |
| 3967 | { |
| 3968 | /* The target is out of reach, so redirect the branch to |
| 3969 | the local stub for this function. */ |
| 3970 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 3971 | stub_entry = elf64_aarch64_get_stub_entry (input_section, |
| 3972 | sym_sec, h, |
| 3973 | rel, globals); |
| 3974 | if (stub_entry != NULL) |
| 3975 | value = (stub_entry->stub_offset |
| 3976 | + stub_entry->stub_sec->output_offset |
| 3977 | + stub_entry->stub_sec->output_section->vma); |
| 3978 | } |
| 3979 | } |
| 3980 | } |
| 3981 | value = aarch64_resolve_relocation (r_type, place, value, |
| 3982 | signed_addend, weak_undef_p); |
| 3983 | break; |
| 3984 | |
| 3985 | case R_AARCH64_ABS16: |
| 3986 | case R_AARCH64_ABS32: |
| 3987 | case R_AARCH64_ADD_ABS_LO12_NC: |
| 3988 | case R_AARCH64_ADR_PREL_LO21: |
| 3989 | case R_AARCH64_ADR_PREL_PG_HI21: |
| 3990 | case R_AARCH64_ADR_PREL_PG_HI21_NC: |
| 3991 | case R_AARCH64_CONDBR19: |
| 3992 | case R_AARCH64_LD_PREL_LO19: |
| 3993 | case R_AARCH64_LDST8_ABS_LO12_NC: |
| 3994 | case R_AARCH64_LDST16_ABS_LO12_NC: |
| 3995 | case R_AARCH64_LDST32_ABS_LO12_NC: |
| 3996 | case R_AARCH64_LDST64_ABS_LO12_NC: |
| 3997 | case R_AARCH64_LDST128_ABS_LO12_NC: |
| 3998 | case R_AARCH64_MOVW_SABS_G0: |
| 3999 | case R_AARCH64_MOVW_SABS_G1: |
| 4000 | case R_AARCH64_MOVW_SABS_G2: |
| 4001 | case R_AARCH64_MOVW_UABS_G0: |
| 4002 | case R_AARCH64_MOVW_UABS_G0_NC: |
| 4003 | case R_AARCH64_MOVW_UABS_G1: |
| 4004 | case R_AARCH64_MOVW_UABS_G1_NC: |
| 4005 | case R_AARCH64_MOVW_UABS_G2: |
| 4006 | case R_AARCH64_MOVW_UABS_G2_NC: |
| 4007 | case R_AARCH64_MOVW_UABS_G3: |
| 4008 | case R_AARCH64_PREL16: |
| 4009 | case R_AARCH64_PREL32: |
| 4010 | case R_AARCH64_PREL64: |
| 4011 | case R_AARCH64_TSTBR14: |
| 4012 | value = aarch64_resolve_relocation (r_type, place, value, |
| 4013 | signed_addend, weak_undef_p); |
| 4014 | break; |
| 4015 | |
| 4016 | case R_AARCH64_LD64_GOT_LO12_NC: |
| 4017 | case R_AARCH64_ADR_GOT_PAGE: |
| 4018 | case R_AARCH64_GOT_LD_PREL19: |
| 4019 | if (globals->root.sgot == NULL) |
| 4020 | BFD_ASSERT (h != NULL); |
| 4021 | |
| 4022 | if (h != NULL) |
| 4023 | { |
| 4024 | value = aarch64_calculate_got_entry_vma (h, globals, info, value, |
| 4025 | output_bfd, |
| 4026 | unresolved_reloc_p); |
| 4027 | value = aarch64_resolve_relocation (r_type, place, value, |
| 4028 | 0, weak_undef_p); |
| 4029 | } |
| 4030 | break; |
| 4031 | |
| 4032 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 4033 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 4034 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4035 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 4036 | if (globals->root.sgot == NULL) |
| 4037 | return bfd_reloc_notsupported; |
| 4038 | |
| 4039 | value = (symbol_got_offset (input_bfd, h, r_symndx) |
| 4040 | + globals->root.sgot->output_section->vma |
| 4041 | + globals->root.sgot->output_section->output_offset); |
| 4042 | |
| 4043 | value = aarch64_resolve_relocation (r_type, place, value, |
| 4044 | 0, weak_undef_p); |
| 4045 | *unresolved_reloc_p = FALSE; |
| 4046 | break; |
| 4047 | |
| 4048 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 4049 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 4050 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 4051 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 4052 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 4053 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 4054 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 4055 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 4056 | value = aarch64_resolve_relocation (r_type, place, value, |
| 4057 | signed_addend - tpoff_base (info), weak_undef_p); |
| 4058 | *unresolved_reloc_p = FALSE; |
| 4059 | break; |
| 4060 | |
| 4061 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 4062 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 4063 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 4064 | case R_AARCH64_TLSDESC_ADD: |
| 4065 | case R_AARCH64_TLSDESC_LDR: |
| 4066 | if (globals->root.sgot == NULL) |
| 4067 | return bfd_reloc_notsupported; |
| 4068 | |
| 4069 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) |
| 4070 | + globals->root.sgotplt->output_section->vma |
| 4071 | + globals->root.sgotplt->output_section->output_offset |
| 4072 | + globals->sgotplt_jump_table_size); |
| 4073 | |
| 4074 | value = aarch64_resolve_relocation (r_type, place, value, |
| 4075 | 0, weak_undef_p); |
| 4076 | *unresolved_reloc_p = FALSE; |
| 4077 | break; |
| 4078 | |
| 4079 | default: |
| 4080 | return bfd_reloc_notsupported; |
| 4081 | } |
| 4082 | |
| 4083 | if (saved_addend) |
| 4084 | *saved_addend = value; |
| 4085 | |
| 4086 | /* Only apply the final relocation in a sequence. */ |
| 4087 | if (save_addend) |
| 4088 | return bfd_reloc_continue; |
| 4089 | |
| 4090 | return bfd_elf_aarch64_put_addend (input_bfd, hit_data, howto, value); |
| 4091 | } |
| 4092 | |
| 4093 | /* Handle TLS relaxations. Relaxing is possible for symbols that use |
| 4094 | R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static |
| 4095 | link. |
| 4096 | |
| 4097 | Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller |
| 4098 | is to then call final_link_relocate. Return other values in the |
| 4099 | case of error. */ |
| 4100 | |
| 4101 | static bfd_reloc_status_type |
| 4102 | elf64_aarch64_tls_relax (struct elf64_aarch64_link_hash_table *globals, |
| 4103 | bfd *input_bfd, bfd_byte *contents, |
| 4104 | Elf_Internal_Rela *rel, struct elf_link_hash_entry *h) |
| 4105 | { |
| 4106 | bfd_boolean is_local = h == NULL; |
| 4107 | unsigned int r_type = ELF64_R_TYPE (rel->r_info); |
| 4108 | unsigned long insn; |
| 4109 | |
| 4110 | BFD_ASSERT (globals && input_bfd && contents && rel); |
| 4111 | |
| 4112 | switch (r_type) |
| 4113 | { |
| 4114 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 4115 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 4116 | if (is_local) |
| 4117 | { |
| 4118 | /* GD->LE relaxation: |
| 4119 | adrp x0, :tlsgd:var => movz x0, :tprel_g1:var |
| 4120 | or |
| 4121 | adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var |
| 4122 | */ |
| 4123 | bfd_putl32 (0xd2a00000, contents + rel->r_offset); |
| 4124 | return bfd_reloc_continue; |
| 4125 | } |
| 4126 | else |
| 4127 | { |
| 4128 | /* GD->IE relaxation: |
| 4129 | adrp x0, :tlsgd:var => adrp x0, :gottprel:var |
| 4130 | or |
| 4131 | adrp x0, :tlsdesc:var => adrp x0, :gottprel:var |
| 4132 | */ |
| 4133 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4134 | return bfd_reloc_continue; |
| 4135 | } |
| 4136 | |
| 4137 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 4138 | if (is_local) |
| 4139 | { |
| 4140 | /* GD->LE relaxation: |
| 4141 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var |
| 4142 | */ |
| 4143 | bfd_putl32 (0xf2800000, contents + rel->r_offset); |
| 4144 | return bfd_reloc_continue; |
| 4145 | } |
| 4146 | else |
| 4147 | { |
| 4148 | /* GD->IE relaxation: |
| 4149 | ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var] |
| 4150 | */ |
| 4151 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4152 | insn &= 0xfffffff0; |
| 4153 | bfd_putl32 (insn, contents + rel->r_offset); |
| 4154 | return bfd_reloc_continue; |
| 4155 | } |
| 4156 | |
| 4157 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 4158 | if (is_local) |
| 4159 | { |
| 4160 | /* GD->LE relaxation |
| 4161 | add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var |
| 4162 | bl __tls_get_addr => mrs x1, tpidr_el0 |
| 4163 | nop => add x0, x1, x0 |
| 4164 | */ |
| 4165 | |
| 4166 | /* First kill the tls_get_addr reloc on the bl instruction. */ |
| 4167 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 4168 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 4169 | |
| 4170 | bfd_putl32 (0xf2800000, contents + rel->r_offset); |
| 4171 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); |
| 4172 | bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); |
| 4173 | return bfd_reloc_continue; |
| 4174 | } |
| 4175 | else |
| 4176 | { |
| 4177 | /* GD->IE relaxation |
| 4178 | ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var] |
| 4179 | BL __tls_get_addr => mrs x1, tpidr_el0 |
| 4180 | R_AARCH64_CALL26 |
| 4181 | NOP => add x0, x1, x0 |
| 4182 | */ |
| 4183 | |
| 4184 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_AARCH64_CALL26); |
| 4185 | |
| 4186 | /* Remove the relocation on the BL instruction. */ |
| 4187 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 4188 | |
| 4189 | bfd_putl32 (0xf9400000, contents + rel->r_offset); |
| 4190 | |
| 4191 | /* We choose to fixup the BL and NOP instructions using the |
| 4192 | offset from the second relocation to allow flexibility in |
| 4193 | scheduling instructions between the ADD and BL. */ |
| 4194 | bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); |
| 4195 | bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4); |
| 4196 | return bfd_reloc_continue; |
| 4197 | } |
| 4198 | |
| 4199 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 4200 | case R_AARCH64_TLSDESC_CALL: |
| 4201 | /* GD->IE/LE relaxation: |
| 4202 | add x0, x0, #:tlsdesc_lo12:var => nop |
| 4203 | blr xd => nop |
| 4204 | */ |
| 4205 | bfd_putl32 (INSN_NOP, contents + rel->r_offset); |
| 4206 | return bfd_reloc_ok; |
| 4207 | |
| 4208 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4209 | /* IE->LE relaxation: |
| 4210 | adrp xd, :gottprel:var => movz xd, :tprel_g1:var |
| 4211 | */ |
| 4212 | if (is_local) |
| 4213 | { |
| 4214 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4215 | bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); |
| 4216 | } |
| 4217 | return bfd_reloc_continue; |
| 4218 | |
| 4219 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 4220 | /* IE->LE relaxation: |
| 4221 | ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var |
| 4222 | */ |
| 4223 | if (is_local) |
| 4224 | { |
| 4225 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4226 | bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset); |
| 4227 | } |
| 4228 | return bfd_reloc_continue; |
| 4229 | |
| 4230 | default: |
| 4231 | return bfd_reloc_continue; |
| 4232 | } |
| 4233 | |
| 4234 | return bfd_reloc_ok; |
| 4235 | } |
| 4236 | |
| 4237 | /* Relocate an AArch64 ELF section. */ |
| 4238 | |
| 4239 | static bfd_boolean |
| 4240 | elf64_aarch64_relocate_section (bfd *output_bfd, |
| 4241 | struct bfd_link_info *info, |
| 4242 | bfd *input_bfd, |
| 4243 | asection *input_section, |
| 4244 | bfd_byte *contents, |
| 4245 | Elf_Internal_Rela *relocs, |
| 4246 | Elf_Internal_Sym *local_syms, |
| 4247 | asection **local_sections) |
| 4248 | { |
| 4249 | Elf_Internal_Shdr *symtab_hdr; |
| 4250 | struct elf_link_hash_entry **sym_hashes; |
| 4251 | Elf_Internal_Rela *rel; |
| 4252 | Elf_Internal_Rela *relend; |
| 4253 | const char *name; |
| 4254 | struct elf64_aarch64_link_hash_table *globals; |
| 4255 | bfd_boolean save_addend = FALSE; |
| 4256 | bfd_vma addend = 0; |
| 4257 | |
| 4258 | globals = elf64_aarch64_hash_table (info); |
| 4259 | |
| 4260 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 4261 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4262 | |
| 4263 | rel = relocs; |
| 4264 | relend = relocs + input_section->reloc_count; |
| 4265 | for (; rel < relend; rel++) |
| 4266 | { |
| 4267 | unsigned int r_type; |
| 4268 | unsigned int relaxed_r_type; |
| 4269 | reloc_howto_type *howto; |
| 4270 | unsigned long r_symndx; |
| 4271 | Elf_Internal_Sym *sym; |
| 4272 | asection *sec; |
| 4273 | struct elf_link_hash_entry *h; |
| 4274 | bfd_vma relocation; |
| 4275 | bfd_reloc_status_type r; |
| 4276 | arelent bfd_reloc; |
| 4277 | char sym_type; |
| 4278 | bfd_boolean unresolved_reloc = FALSE; |
| 4279 | char *error_message = NULL; |
| 4280 | |
| 4281 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 4282 | r_type = ELF64_R_TYPE (rel->r_info); |
| 4283 | |
| 4284 | bfd_reloc.howto = elf64_aarch64_howto_from_type (r_type); |
| 4285 | howto = bfd_reloc.howto; |
| 4286 | |
| 4287 | h = NULL; |
| 4288 | sym = NULL; |
| 4289 | sec = NULL; |
| 4290 | |
| 4291 | if (r_symndx < symtab_hdr->sh_info) |
| 4292 | { |
| 4293 | sym = local_syms + r_symndx; |
| 4294 | sym_type = ELF64_ST_TYPE (sym->st_info); |
| 4295 | sec = local_sections[r_symndx]; |
| 4296 | |
| 4297 | /* An object file might have a reference to a local |
| 4298 | undefined symbol. This is a daft object file, but we |
| 4299 | should at least do something about it. */ |
| 4300 | if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL |
| 4301 | && bfd_is_und_section (sec) |
| 4302 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) |
| 4303 | { |
| 4304 | if (!info->callbacks->undefined_symbol |
| 4305 | (info, bfd_elf_string_from_elf_section |
| 4306 | (input_bfd, symtab_hdr->sh_link, sym->st_name), |
| 4307 | input_bfd, input_section, rel->r_offset, TRUE)) |
| 4308 | return FALSE; |
| 4309 | } |
| 4310 | |
| 4311 | if (r_type >= R_AARCH64_dyn_max) |
| 4312 | { |
| 4313 | bfd_set_error (bfd_error_bad_value); |
| 4314 | return FALSE; |
| 4315 | } |
| 4316 | |
| 4317 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 4318 | } |
| 4319 | else |
| 4320 | { |
| 4321 | bfd_boolean warned; |
| 4322 | |
| 4323 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4324 | r_symndx, symtab_hdr, sym_hashes, |
| 4325 | h, sec, relocation, |
| 4326 | unresolved_reloc, warned); |
| 4327 | |
| 4328 | sym_type = h->type; |
| 4329 | } |
| 4330 | |
| 4331 | if (sec != NULL && discarded_section (sec)) |
| 4332 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 4333 | rel, 1, relend, howto, 0, contents); |
| 4334 | |
| 4335 | if (info->relocatable) |
| 4336 | { |
| 4337 | /* This is a relocatable link. We don't have to change |
| 4338 | anything, unless the reloc is against a section symbol, |
| 4339 | in which case we have to adjust according to where the |
| 4340 | section symbol winds up in the output section. */ |
| 4341 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 4342 | rel->r_addend += sec->output_offset; |
| 4343 | continue; |
| 4344 | } |
| 4345 | |
| 4346 | if (h != NULL) |
| 4347 | name = h->root.root.string; |
| 4348 | else |
| 4349 | { |
| 4350 | name = (bfd_elf_string_from_elf_section |
| 4351 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 4352 | if (name == NULL || *name == '\0') |
| 4353 | name = bfd_section_name (input_bfd, sec); |
| 4354 | } |
| 4355 | |
| 4356 | if (r_symndx != 0 |
| 4357 | && r_type != R_AARCH64_NONE |
| 4358 | && r_type != R_AARCH64_NULL |
| 4359 | && (h == NULL |
| 4360 | || h->root.type == bfd_link_hash_defined |
| 4361 | || h->root.type == bfd_link_hash_defweak) |
| 4362 | && IS_AARCH64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
| 4363 | { |
| 4364 | (*_bfd_error_handler) |
| 4365 | ((sym_type == STT_TLS |
| 4366 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| 4367 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), |
| 4368 | input_bfd, |
| 4369 | input_section, (long) rel->r_offset, howto->name, name); |
| 4370 | } |
| 4371 | |
| 4372 | |
| 4373 | /* We relax only if we can see that there can be a valid transition |
| 4374 | from a reloc type to another. |
| 4375 | We call elf64_aarch64_final_link_relocate unless we're completely |
| 4376 | done, i.e., the relaxation produced the final output we want. */ |
| 4377 | |
| 4378 | relaxed_r_type = aarch64_tls_transition (input_bfd, info, r_type, |
| 4379 | h, r_symndx); |
| 4380 | if (relaxed_r_type != r_type) |
| 4381 | { |
| 4382 | r_type = relaxed_r_type; |
| 4383 | howto = elf64_aarch64_howto_from_type (r_type); |
| 4384 | |
| 4385 | r = elf64_aarch64_tls_relax (globals, input_bfd, contents, rel, h); |
| 4386 | unresolved_reloc = 0; |
| 4387 | } |
| 4388 | else |
| 4389 | r = bfd_reloc_continue; |
| 4390 | |
| 4391 | /* There may be multiple consecutive relocations for the |
| 4392 | same offset. In that case we are supposed to treat the |
| 4393 | output of each relocation as the addend for the next. */ |
| 4394 | if (rel + 1 < relend |
| 4395 | && rel->r_offset == rel[1].r_offset |
| 4396 | && ELF64_R_TYPE (rel[1].r_info) != R_AARCH64_NONE |
| 4397 | && ELF64_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) |
| 4398 | save_addend = TRUE; |
| 4399 | else |
| 4400 | save_addend = FALSE; |
| 4401 | |
| 4402 | if (r == bfd_reloc_continue) |
| 4403 | r = elf64_aarch64_final_link_relocate (howto, input_bfd, output_bfd, |
| 4404 | input_section, contents, rel, |
| 4405 | relocation, info, sec, |
| 4406 | h, &unresolved_reloc, |
| 4407 | save_addend, &addend); |
| 4408 | |
| 4409 | switch (r_type) |
| 4410 | { |
| 4411 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 4412 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 4413 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 4414 | { |
| 4415 | bfd_boolean need_relocs = FALSE; |
| 4416 | bfd_byte *loc; |
| 4417 | int indx; |
| 4418 | bfd_vma off; |
| 4419 | |
| 4420 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 4421 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 4422 | |
| 4423 | need_relocs = |
| 4424 | (info->shared || indx != 0) && |
| 4425 | (h == NULL |
| 4426 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4427 | || h->root.type != bfd_link_hash_undefweak); |
| 4428 | |
| 4429 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 4430 | |
| 4431 | if (need_relocs) |
| 4432 | { |
| 4433 | Elf_Internal_Rela rela; |
| 4434 | rela.r_info = ELF64_R_INFO (indx, R_AARCH64_TLS_DTPMOD64); |
| 4435 | rela.r_addend = 0; |
| 4436 | rela.r_offset = globals->root.sgot->output_section->vma + |
| 4437 | globals->root.sgot->output_offset + off; |
| 4438 | |
| 4439 | |
| 4440 | loc = globals->root.srelgot->contents; |
| 4441 | loc += globals->root.srelgot->reloc_count++ |
| 4442 | * RELOC_SIZE (htab); |
| 4443 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 4444 | |
| 4445 | if (indx == 0) |
| 4446 | { |
| 4447 | bfd_put_64 (output_bfd, |
| 4448 | relocation - dtpoff_base (info), |
| 4449 | globals->root.sgot->contents + off |
| 4450 | + GOT_ENTRY_SIZE); |
| 4451 | } |
| 4452 | else |
| 4453 | { |
| 4454 | /* This TLS symbol is global. We emit a |
| 4455 | relocation to fixup the tls offset at load |
| 4456 | time. */ |
| 4457 | rela.r_info = |
| 4458 | ELF64_R_INFO (indx, R_AARCH64_TLS_DTPREL64); |
| 4459 | rela.r_addend = 0; |
| 4460 | rela.r_offset = |
| 4461 | (globals->root.sgot->output_section->vma |
| 4462 | + globals->root.sgot->output_offset + off |
| 4463 | + GOT_ENTRY_SIZE); |
| 4464 | |
| 4465 | loc = globals->root.srelgot->contents; |
| 4466 | loc += globals->root.srelgot->reloc_count++ |
| 4467 | * RELOC_SIZE (globals); |
| 4468 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 4469 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 4470 | globals->root.sgot->contents + off |
| 4471 | + GOT_ENTRY_SIZE); |
| 4472 | } |
| 4473 | } |
| 4474 | else |
| 4475 | { |
| 4476 | bfd_put_64 (output_bfd, (bfd_vma) 1, |
| 4477 | globals->root.sgot->contents + off); |
| 4478 | bfd_put_64 (output_bfd, |
| 4479 | relocation - dtpoff_base (info), |
| 4480 | globals->root.sgot->contents + off |
| 4481 | + GOT_ENTRY_SIZE); |
| 4482 | } |
| 4483 | |
| 4484 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 4485 | } |
| 4486 | break; |
| 4487 | |
| 4488 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4489 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 4490 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 4491 | { |
| 4492 | bfd_boolean need_relocs = FALSE; |
| 4493 | bfd_byte *loc; |
| 4494 | int indx; |
| 4495 | bfd_vma off; |
| 4496 | |
| 4497 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 4498 | |
| 4499 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 4500 | |
| 4501 | need_relocs = |
| 4502 | (info->shared || indx != 0) && |
| 4503 | (h == NULL |
| 4504 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4505 | || h->root.type != bfd_link_hash_undefweak); |
| 4506 | |
| 4507 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 4508 | |
| 4509 | if (need_relocs) |
| 4510 | { |
| 4511 | Elf_Internal_Rela rela; |
| 4512 | |
| 4513 | if (indx == 0) |
| 4514 | rela.r_addend = relocation - dtpoff_base (info); |
| 4515 | else |
| 4516 | rela.r_addend = 0; |
| 4517 | |
| 4518 | rela.r_info = ELF64_R_INFO (indx, R_AARCH64_TLS_TPREL64); |
| 4519 | rela.r_offset = globals->root.sgot->output_section->vma + |
| 4520 | globals->root.sgot->output_offset + off; |
| 4521 | |
| 4522 | loc = globals->root.srelgot->contents; |
| 4523 | loc += globals->root.srelgot->reloc_count++ |
| 4524 | * RELOC_SIZE (htab); |
| 4525 | |
| 4526 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 4527 | |
| 4528 | bfd_put_64 (output_bfd, rela.r_addend, |
| 4529 | globals->root.sgot->contents + off); |
| 4530 | } |
| 4531 | else |
| 4532 | bfd_put_64 (output_bfd, relocation - tpoff_base (info), |
| 4533 | globals->root.sgot->contents + off); |
| 4534 | |
| 4535 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 4536 | } |
| 4537 | break; |
| 4538 | |
| 4539 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 4540 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 4541 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 4542 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 4543 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 4544 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 4545 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 4546 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 4547 | break; |
| 4548 | |
| 4549 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 4550 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 4551 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 4552 | if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 4553 | { |
| 4554 | bfd_boolean need_relocs = FALSE; |
| 4555 | int indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 4556 | bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); |
| 4557 | |
| 4558 | need_relocs = (h == NULL |
| 4559 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4560 | || h->root.type != bfd_link_hash_undefweak); |
| 4561 | |
| 4562 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 4563 | BFD_ASSERT (globals->root.sgot != NULL); |
| 4564 | |
| 4565 | if (need_relocs) |
| 4566 | { |
| 4567 | bfd_byte *loc; |
| 4568 | Elf_Internal_Rela rela; |
| 4569 | rela.r_info = ELF64_R_INFO (indx, R_AARCH64_TLSDESC); |
| 4570 | rela.r_addend = 0; |
| 4571 | rela.r_offset = (globals->root.sgotplt->output_section->vma |
| 4572 | + globals->root.sgotplt->output_offset |
| 4573 | + off + globals->sgotplt_jump_table_size); |
| 4574 | |
| 4575 | if (indx == 0) |
| 4576 | rela.r_addend = relocation - dtpoff_base (info); |
| 4577 | |
| 4578 | /* Allocate the next available slot in the PLT reloc |
| 4579 | section to hold our R_AARCH64_TLSDESC, the next |
| 4580 | available slot is determined from reloc_count, |
| 4581 | which we step. But note, reloc_count was |
| 4582 | artifically moved down while allocating slots for |
| 4583 | real PLT relocs such that all of the PLT relocs |
| 4584 | will fit above the initial reloc_count and the |
| 4585 | extra stuff will fit below. */ |
| 4586 | loc = globals->root.srelplt->contents; |
| 4587 | loc += globals->root.srelplt->reloc_count++ |
| 4588 | * RELOC_SIZE (globals); |
| 4589 | |
| 4590 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 4591 | |
| 4592 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 4593 | globals->root.sgotplt->contents + off + |
| 4594 | globals->sgotplt_jump_table_size); |
| 4595 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 4596 | globals->root.sgotplt->contents + off + |
| 4597 | globals->sgotplt_jump_table_size + |
| 4598 | GOT_ENTRY_SIZE); |
| 4599 | } |
| 4600 | |
| 4601 | symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); |
| 4602 | } |
| 4603 | break; |
| 4604 | } |
| 4605 | |
| 4606 | if (!save_addend) |
| 4607 | addend = 0; |
| 4608 | |
| 4609 | |
| 4610 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 4611 | because such sections are not SEC_ALLOC and thus ld.so will |
| 4612 | not process them. */ |
| 4613 | if (unresolved_reloc |
| 4614 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 4615 | && h->def_dynamic) |
| 4616 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 4617 | +rel->r_offset) != (bfd_vma) - 1) |
| 4618 | { |
| 4619 | (*_bfd_error_handler) |
| 4620 | (_ |
| 4621 | ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 4622 | input_bfd, input_section, (long) rel->r_offset, howto->name, |
| 4623 | h->root.root.string); |
| 4624 | return FALSE; |
| 4625 | } |
| 4626 | |
| 4627 | if (r != bfd_reloc_ok && r != bfd_reloc_continue) |
| 4628 | { |
| 4629 | switch (r) |
| 4630 | { |
| 4631 | case bfd_reloc_overflow: |
| 4632 | /* If the overflowing reloc was to an undefined symbol, |
| 4633 | we have already printed one error message and there |
| 4634 | is no point complaining again. */ |
| 4635 | if ((!h || |
| 4636 | h->root.type != bfd_link_hash_undefined) |
| 4637 | && (!((*info->callbacks->reloc_overflow) |
| 4638 | (info, (h ? &h->root : NULL), name, howto->name, |
| 4639 | (bfd_vma) 0, input_bfd, input_section, |
| 4640 | rel->r_offset)))) |
| 4641 | return FALSE; |
| 4642 | break; |
| 4643 | |
| 4644 | case bfd_reloc_undefined: |
| 4645 | if (!((*info->callbacks->undefined_symbol) |
| 4646 | (info, name, input_bfd, input_section, |
| 4647 | rel->r_offset, TRUE))) |
| 4648 | return FALSE; |
| 4649 | break; |
| 4650 | |
| 4651 | case bfd_reloc_outofrange: |
| 4652 | error_message = _("out of range"); |
| 4653 | goto common_error; |
| 4654 | |
| 4655 | case bfd_reloc_notsupported: |
| 4656 | error_message = _("unsupported relocation"); |
| 4657 | goto common_error; |
| 4658 | |
| 4659 | case bfd_reloc_dangerous: |
| 4660 | /* error_message should already be set. */ |
| 4661 | goto common_error; |
| 4662 | |
| 4663 | default: |
| 4664 | error_message = _("unknown error"); |
| 4665 | /* Fall through. */ |
| 4666 | |
| 4667 | common_error: |
| 4668 | BFD_ASSERT (error_message != NULL); |
| 4669 | if (!((*info->callbacks->reloc_dangerous) |
| 4670 | (info, error_message, input_bfd, input_section, |
| 4671 | rel->r_offset))) |
| 4672 | return FALSE; |
| 4673 | break; |
| 4674 | } |
| 4675 | } |
| 4676 | } |
| 4677 | |
| 4678 | return TRUE; |
| 4679 | } |
| 4680 | |
| 4681 | /* Set the right machine number. */ |
| 4682 | |
| 4683 | static bfd_boolean |
| 4684 | elf64_aarch64_object_p (bfd *abfd) |
| 4685 | { |
| 4686 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); |
| 4687 | return TRUE; |
| 4688 | } |
| 4689 | |
| 4690 | /* Function to keep AArch64 specific flags in the ELF header. */ |
| 4691 | |
| 4692 | static bfd_boolean |
| 4693 | elf64_aarch64_set_private_flags (bfd *abfd, flagword flags) |
| 4694 | { |
| 4695 | if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) |
| 4696 | { |
| 4697 | } |
| 4698 | else |
| 4699 | { |
| 4700 | elf_elfheader (abfd)->e_flags = flags; |
| 4701 | elf_flags_init (abfd) = TRUE; |
| 4702 | } |
| 4703 | |
| 4704 | return TRUE; |
| 4705 | } |
| 4706 | |
| 4707 | /* Copy backend specific data from one object module to another. */ |
| 4708 | |
| 4709 | static bfd_boolean |
| 4710 | elf64_aarch64_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4711 | { |
| 4712 | flagword in_flags; |
| 4713 | |
| 4714 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) |
| 4715 | return TRUE; |
| 4716 | |
| 4717 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 4718 | |
| 4719 | elf_elfheader (obfd)->e_flags = in_flags; |
| 4720 | elf_flags_init (obfd) = TRUE; |
| 4721 | |
| 4722 | /* Also copy the EI_OSABI field. */ |
| 4723 | elf_elfheader (obfd)->e_ident[EI_OSABI] = |
| 4724 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; |
| 4725 | |
| 4726 | /* Copy object attributes. */ |
| 4727 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 4728 | |
| 4729 | return TRUE; |
| 4730 | } |
| 4731 | |
| 4732 | /* Merge backend specific data from an object file to the output |
| 4733 | object file when linking. */ |
| 4734 | |
| 4735 | static bfd_boolean |
| 4736 | elf64_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4737 | { |
| 4738 | flagword out_flags; |
| 4739 | flagword in_flags; |
| 4740 | bfd_boolean flags_compatible = TRUE; |
| 4741 | asection *sec; |
| 4742 | |
| 4743 | /* Check if we have the same endianess. */ |
| 4744 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) |
| 4745 | return FALSE; |
| 4746 | |
| 4747 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) |
| 4748 | return TRUE; |
| 4749 | |
| 4750 | /* The input BFD must have had its flags initialised. */ |
| 4751 | /* The following seems bogus to me -- The flags are initialized in |
| 4752 | the assembler but I don't think an elf_flags_init field is |
| 4753 | written into the object. */ |
| 4754 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| 4755 | |
| 4756 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 4757 | out_flags = elf_elfheader (obfd)->e_flags; |
| 4758 | |
| 4759 | if (!elf_flags_init (obfd)) |
| 4760 | { |
| 4761 | /* If the input is the default architecture and had the default |
| 4762 | flags then do not bother setting the flags for the output |
| 4763 | architecture, instead allow future merges to do this. If no |
| 4764 | future merges ever set these flags then they will retain their |
| 4765 | uninitialised values, which surprise surprise, correspond |
| 4766 | to the default values. */ |
| 4767 | if (bfd_get_arch_info (ibfd)->the_default |
| 4768 | && elf_elfheader (ibfd)->e_flags == 0) |
| 4769 | return TRUE; |
| 4770 | |
| 4771 | elf_flags_init (obfd) = TRUE; |
| 4772 | elf_elfheader (obfd)->e_flags = in_flags; |
| 4773 | |
| 4774 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 4775 | && bfd_get_arch_info (obfd)->the_default) |
| 4776 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 4777 | bfd_get_mach (ibfd)); |
| 4778 | |
| 4779 | return TRUE; |
| 4780 | } |
| 4781 | |
| 4782 | /* Identical flags must be compatible. */ |
| 4783 | if (in_flags == out_flags) |
| 4784 | return TRUE; |
| 4785 | |
| 4786 | /* Check to see if the input BFD actually contains any sections. If |
| 4787 | not, its flags may not have been initialised either, but it |
| 4788 | cannot actually cause any incompatiblity. Do not short-circuit |
| 4789 | dynamic objects; their section list may be emptied by |
| 4790 | elf_link_add_object_symbols. |
| 4791 | |
| 4792 | Also check to see if there are no code sections in the input. |
| 4793 | In this case there is no need to check for code specific flags. |
| 4794 | XXX - do we need to worry about floating-point format compatability |
| 4795 | in data sections ? */ |
| 4796 | if (!(ibfd->flags & DYNAMIC)) |
| 4797 | { |
| 4798 | bfd_boolean null_input_bfd = TRUE; |
| 4799 | bfd_boolean only_data_sections = TRUE; |
| 4800 | |
| 4801 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 4802 | { |
| 4803 | if ((bfd_get_section_flags (ibfd, sec) |
| 4804 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 4805 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 4806 | only_data_sections = FALSE; |
| 4807 | |
| 4808 | null_input_bfd = FALSE; |
| 4809 | break; |
| 4810 | } |
| 4811 | |
| 4812 | if (null_input_bfd || only_data_sections) |
| 4813 | return TRUE; |
| 4814 | } |
| 4815 | |
| 4816 | return flags_compatible; |
| 4817 | } |
| 4818 | |
| 4819 | /* Display the flags field. */ |
| 4820 | |
| 4821 | static bfd_boolean |
| 4822 | elf64_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) |
| 4823 | { |
| 4824 | FILE *file = (FILE *) ptr; |
| 4825 | unsigned long flags; |
| 4826 | |
| 4827 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 4828 | |
| 4829 | /* Print normal ELF private data. */ |
| 4830 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 4831 | |
| 4832 | flags = elf_elfheader (abfd)->e_flags; |
| 4833 | /* Ignore init flag - it may not be set, despite the flags field |
| 4834 | containing valid data. */ |
| 4835 | |
| 4836 | /* xgettext:c-format */ |
| 4837 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 4838 | |
| 4839 | if (flags) |
| 4840 | fprintf (file, _("<Unrecognised flag bits set>")); |
| 4841 | |
| 4842 | fputc ('\n', file); |
| 4843 | |
| 4844 | return TRUE; |
| 4845 | } |
| 4846 | |
| 4847 | /* Update the got entry reference counts for the section being removed. */ |
| 4848 | |
| 4849 | static bfd_boolean |
| 4850 | elf64_aarch64_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 4851 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4852 | asection *sec ATTRIBUTE_UNUSED, |
| 4853 | const Elf_Internal_Rela * |
| 4854 | relocs ATTRIBUTE_UNUSED) |
| 4855 | { |
| 4856 | return TRUE; |
| 4857 | } |
| 4858 | |
| 4859 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 4860 | regular object. The current definition is in some section of the |
| 4861 | dynamic object, but we're not including those sections. We have to |
| 4862 | change the definition to something the rest of the link can |
| 4863 | understand. */ |
| 4864 | |
| 4865 | static bfd_boolean |
| 4866 | elf64_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 4867 | struct elf_link_hash_entry *h) |
| 4868 | { |
| 4869 | struct elf64_aarch64_link_hash_table *htab; |
| 4870 | asection *s; |
| 4871 | |
| 4872 | /* If this is a function, put it in the procedure linkage table. We |
| 4873 | will fill in the contents of the procedure linkage table later, |
| 4874 | when we know the address of the .got section. */ |
| 4875 | if (h->type == STT_FUNC || h->needs_plt) |
| 4876 | { |
| 4877 | if (h->plt.refcount <= 0 |
| 4878 | || SYMBOL_CALLS_LOCAL (info, h) |
| 4879 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 4880 | && h->root.type == bfd_link_hash_undefweak)) |
| 4881 | { |
| 4882 | /* This case can occur if we saw a CALL26 reloc in |
| 4883 | an input file, but the symbol wasn't referred to |
| 4884 | by a dynamic object or all references were |
| 4885 | garbage collected. In which case we can end up |
| 4886 | resolving. */ |
| 4887 | h->plt.offset = (bfd_vma) - 1; |
| 4888 | h->needs_plt = 0; |
| 4889 | } |
| 4890 | |
| 4891 | return TRUE; |
| 4892 | } |
| 4893 | else |
| 4894 | /* It's possible that we incorrectly decided a .plt reloc was |
| 4895 | needed for an R_X86_64_PC32 reloc to a non-function sym in |
| 4896 | check_relocs. We can't decide accurately between function and |
| 4897 | non-function syms in check-relocs; Objects loaded later in |
| 4898 | the link may change h->type. So fix it now. */ |
| 4899 | h->plt.offset = (bfd_vma) - 1; |
| 4900 | |
| 4901 | |
| 4902 | /* If this is a weak symbol, and there is a real definition, the |
| 4903 | processor independent code will have arranged for us to see the |
| 4904 | real definition first, and we can just use the same value. */ |
| 4905 | if (h->u.weakdef != NULL) |
| 4906 | { |
| 4907 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 4908 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 4909 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 4910 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 4911 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
| 4912 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 4913 | return TRUE; |
| 4914 | } |
| 4915 | |
| 4916 | /* If we are creating a shared library, we must presume that the |
| 4917 | only references to the symbol are via the global offset table. |
| 4918 | For such cases we need not do anything here; the relocations will |
| 4919 | be handled correctly by relocate_section. */ |
| 4920 | if (info->shared) |
| 4921 | return TRUE; |
| 4922 | |
| 4923 | /* If there are no references to this symbol that do not use the |
| 4924 | GOT, we don't need to generate a copy reloc. */ |
| 4925 | if (!h->non_got_ref) |
| 4926 | return TRUE; |
| 4927 | |
| 4928 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 4929 | if (info->nocopyreloc) |
| 4930 | { |
| 4931 | h->non_got_ref = 0; |
| 4932 | return TRUE; |
| 4933 | } |
| 4934 | |
| 4935 | /* We must allocate the symbol in our .dynbss section, which will |
| 4936 | become part of the .bss section of the executable. There will be |
| 4937 | an entry for this symbol in the .dynsym section. The dynamic |
| 4938 | object will contain position independent code, so all references |
| 4939 | from the dynamic object to this symbol will go through the global |
| 4940 | offset table. The dynamic linker will use the .dynsym entry to |
| 4941 | determine the address it must put in the global offset table, so |
| 4942 | both the dynamic object and the regular object will refer to the |
| 4943 | same memory location for the variable. */ |
| 4944 | |
| 4945 | htab = elf64_aarch64_hash_table (info); |
| 4946 | |
| 4947 | /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker |
| 4948 | to copy the initial value out of the dynamic object and into the |
| 4949 | runtime process image. */ |
| 4950 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 4951 | { |
| 4952 | htab->srelbss->size += RELOC_SIZE (htab); |
| 4953 | h->needs_copy = 1; |
| 4954 | } |
| 4955 | |
| 4956 | s = htab->sdynbss; |
| 4957 | |
| 4958 | return _bfd_elf_adjust_dynamic_copy (h, s); |
| 4959 | |
| 4960 | } |
| 4961 | |
| 4962 | static bfd_boolean |
| 4963 | elf64_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) |
| 4964 | { |
| 4965 | struct elf_aarch64_local_symbol *locals; |
| 4966 | locals = elf64_aarch64_locals (abfd); |
| 4967 | if (locals == NULL) |
| 4968 | { |
| 4969 | locals = (struct elf_aarch64_local_symbol *) |
| 4970 | bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); |
| 4971 | if (locals == NULL) |
| 4972 | return FALSE; |
| 4973 | elf64_aarch64_locals (abfd) = locals; |
| 4974 | } |
| 4975 | return TRUE; |
| 4976 | } |
| 4977 | |
| 4978 | /* Look through the relocs for a section during the first phase. */ |
| 4979 | |
| 4980 | static bfd_boolean |
| 4981 | elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 4982 | asection *sec, const Elf_Internal_Rela *relocs) |
| 4983 | { |
| 4984 | Elf_Internal_Shdr *symtab_hdr; |
| 4985 | struct elf_link_hash_entry **sym_hashes; |
| 4986 | const Elf_Internal_Rela *rel; |
| 4987 | const Elf_Internal_Rela *rel_end; |
| 4988 | asection *sreloc; |
| 4989 | |
| 4990 | struct elf64_aarch64_link_hash_table *htab; |
| 4991 | |
| 4992 | unsigned long nsyms; |
| 4993 | |
| 4994 | if (info->relocatable) |
| 4995 | return TRUE; |
| 4996 | |
| 4997 | BFD_ASSERT (is_aarch64_elf (abfd)); |
| 4998 | |
| 4999 | htab = elf64_aarch64_hash_table (info); |
| 5000 | sreloc = NULL; |
| 5001 | |
| 5002 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 5003 | sym_hashes = elf_sym_hashes (abfd); |
| 5004 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
| 5005 | |
| 5006 | rel_end = relocs + sec->reloc_count; |
| 5007 | for (rel = relocs; rel < rel_end; rel++) |
| 5008 | { |
| 5009 | struct elf_link_hash_entry *h; |
| 5010 | unsigned long r_symndx; |
| 5011 | unsigned int r_type; |
| 5012 | |
| 5013 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 5014 | r_type = ELF64_R_TYPE (rel->r_info); |
| 5015 | |
| 5016 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 5017 | { |
| 5018 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| 5019 | r_symndx); |
| 5020 | return FALSE; |
| 5021 | } |
| 5022 | |
| 5023 | if (r_symndx >= nsyms |
| 5024 | /* PR 9934: It is possible to have relocations that do not |
| 5025 | refer to symbols, thus it is also possible to have an |
| 5026 | object file containing relocations but no symbol table. */ |
| 5027 | && (r_symndx > 0 || nsyms > 0)) |
| 5028 | { |
| 5029 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| 5030 | r_symndx); |
| 5031 | return FALSE; |
| 5032 | } |
| 5033 | |
| 5034 | if (nsyms == 0 || r_symndx < symtab_hdr->sh_info) |
| 5035 | h = NULL; |
| 5036 | else |
| 5037 | { |
| 5038 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5039 | while (h->root.type == bfd_link_hash_indirect |
| 5040 | || h->root.type == bfd_link_hash_warning) |
| 5041 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5042 | } |
| 5043 | |
| 5044 | /* Could be done earlier, if h were already available. */ |
| 5045 | r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx); |
| 5046 | |
| 5047 | switch (r_type) |
| 5048 | { |
| 5049 | case R_AARCH64_ABS64: |
| 5050 | |
| 5051 | /* We don't need to handle relocs into sections not going into |
| 5052 | the "real" output. */ |
| 5053 | if ((sec->flags & SEC_ALLOC) == 0) |
| 5054 | break; |
| 5055 | |
| 5056 | if (h != NULL) |
| 5057 | { |
| 5058 | if (!info->shared) |
| 5059 | h->non_got_ref = 1; |
| 5060 | |
| 5061 | h->plt.refcount += 1; |
| 5062 | h->pointer_equality_needed = 1; |
| 5063 | } |
| 5064 | |
| 5065 | /* No need to do anything if we're not creating a shared |
| 5066 | object. */ |
| 5067 | if (! info->shared) |
| 5068 | break; |
| 5069 | |
| 5070 | { |
| 5071 | struct elf_dyn_relocs *p; |
| 5072 | struct elf_dyn_relocs **head; |
| 5073 | |
| 5074 | /* We must copy these reloc types into the output file. |
| 5075 | Create a reloc section in dynobj and make room for |
| 5076 | this reloc. */ |
| 5077 | if (sreloc == NULL) |
| 5078 | { |
| 5079 | if (htab->root.dynobj == NULL) |
| 5080 | htab->root.dynobj = abfd; |
| 5081 | |
| 5082 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 5083 | (sec, htab->root.dynobj, 3, abfd, /*rela? */ TRUE); |
| 5084 | |
| 5085 | if (sreloc == NULL) |
| 5086 | return FALSE; |
| 5087 | } |
| 5088 | |
| 5089 | /* If this is a global symbol, we count the number of |
| 5090 | relocations we need for this symbol. */ |
| 5091 | if (h != NULL) |
| 5092 | { |
| 5093 | struct elf64_aarch64_link_hash_entry *eh; |
| 5094 | eh = (struct elf64_aarch64_link_hash_entry *) h; |
| 5095 | head = &eh->dyn_relocs; |
| 5096 | } |
| 5097 | else |
| 5098 | { |
| 5099 | /* Track dynamic relocs needed for local syms too. |
| 5100 | We really need local syms available to do this |
| 5101 | easily. Oh well. */ |
| 5102 | |
| 5103 | asection *s; |
| 5104 | void **vpp; |
| 5105 | Elf_Internal_Sym *isym; |
| 5106 | |
| 5107 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 5108 | abfd, r_symndx); |
| 5109 | if (isym == NULL) |
| 5110 | return FALSE; |
| 5111 | |
| 5112 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 5113 | if (s == NULL) |
| 5114 | s = sec; |
| 5115 | |
| 5116 | /* Beware of type punned pointers vs strict aliasing |
| 5117 | rules. */ |
| 5118 | vpp = &(elf_section_data (s)->local_dynrel); |
| 5119 | head = (struct elf_dyn_relocs **) vpp; |
| 5120 | } |
| 5121 | |
| 5122 | p = *head; |
| 5123 | if (p == NULL || p->sec != sec) |
| 5124 | { |
| 5125 | bfd_size_type amt = sizeof *p; |
| 5126 | p = ((struct elf_dyn_relocs *) |
| 5127 | bfd_zalloc (htab->root.dynobj, amt)); |
| 5128 | if (p == NULL) |
| 5129 | return FALSE; |
| 5130 | p->next = *head; |
| 5131 | *head = p; |
| 5132 | p->sec = sec; |
| 5133 | } |
| 5134 | |
| 5135 | p->count += 1; |
| 5136 | |
| 5137 | } |
| 5138 | break; |
| 5139 | |
| 5140 | /* RR: We probably want to keep a consistency check that |
| 5141 | there are no dangling GOT_PAGE relocs. */ |
| 5142 | case R_AARCH64_LD64_GOT_LO12_NC: |
| 5143 | case R_AARCH64_GOT_LD_PREL19: |
| 5144 | case R_AARCH64_ADR_GOT_PAGE: |
| 5145 | case R_AARCH64_TLSGD_ADR_PAGE21: |
| 5146 | case R_AARCH64_TLSGD_ADD_LO12_NC: |
| 5147 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 5148 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 5149 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 5150 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 5151 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 5152 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 5153 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 5154 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 5155 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 5156 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 5157 | case R_AARCH64_TLSDESC_ADR_PAGE: |
| 5158 | case R_AARCH64_TLSDESC_ADD_LO12_NC: |
| 5159 | case R_AARCH64_TLSDESC_LD64_LO12_NC: |
| 5160 | { |
| 5161 | unsigned got_type; |
| 5162 | unsigned old_got_type; |
| 5163 | |
| 5164 | got_type = aarch64_reloc_got_type (r_type); |
| 5165 | |
| 5166 | if (h) |
| 5167 | { |
| 5168 | h->got.refcount += 1; |
| 5169 | old_got_type = elf64_aarch64_hash_entry (h)->got_type; |
| 5170 | } |
| 5171 | else |
| 5172 | { |
| 5173 | struct elf_aarch64_local_symbol *locals; |
| 5174 | |
| 5175 | if (!elf64_aarch64_allocate_local_symbols |
| 5176 | (abfd, symtab_hdr->sh_info)) |
| 5177 | return FALSE; |
| 5178 | |
| 5179 | locals = elf64_aarch64_locals (abfd); |
| 5180 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| 5181 | locals[r_symndx].got_refcount += 1; |
| 5182 | old_got_type = locals[r_symndx].got_type; |
| 5183 | } |
| 5184 | |
| 5185 | /* If a variable is accessed with both general dynamic TLS |
| 5186 | methods, two slots may be created. */ |
| 5187 | if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) |
| 5188 | got_type |= old_got_type; |
| 5189 | |
| 5190 | /* We will already have issued an error message if there |
| 5191 | is a TLS/non-TLS mismatch, based on the symbol type. |
| 5192 | So just combine any TLS types needed. */ |
| 5193 | if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL |
| 5194 | && got_type != GOT_NORMAL) |
| 5195 | got_type |= old_got_type; |
| 5196 | |
| 5197 | /* If the symbol is accessed by both IE and GD methods, we |
| 5198 | are able to relax. Turn off the GD flag, without |
| 5199 | messing up with any other kind of TLS types that may be |
| 5200 | involved. */ |
| 5201 | if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) |
| 5202 | got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); |
| 5203 | |
| 5204 | if (old_got_type != got_type) |
| 5205 | { |
| 5206 | if (h != NULL) |
| 5207 | elf64_aarch64_hash_entry (h)->got_type = got_type; |
| 5208 | else |
| 5209 | { |
| 5210 | struct elf_aarch64_local_symbol *locals; |
| 5211 | locals = elf64_aarch64_locals (abfd); |
| 5212 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| 5213 | locals[r_symndx].got_type = got_type; |
| 5214 | } |
| 5215 | } |
| 5216 | |
| 5217 | if (htab->root.sgot == NULL) |
| 5218 | { |
| 5219 | if (htab->root.dynobj == NULL) |
| 5220 | htab->root.dynobj = abfd; |
| 5221 | if (!_bfd_elf_create_got_section (htab->root.dynobj, info)) |
| 5222 | return FALSE; |
| 5223 | } |
| 5224 | break; |
| 5225 | } |
| 5226 | |
| 5227 | case R_AARCH64_ADR_PREL_PG_HI21_NC: |
| 5228 | case R_AARCH64_ADR_PREL_PG_HI21: |
| 5229 | case R_AARCH64_ADR_PREL_LO21: |
| 5230 | if (h != NULL && info->executable) |
| 5231 | { |
| 5232 | /* If this reloc is in a read-only section, we might |
| 5233 | need a copy reloc. We can't check reliably at this |
| 5234 | stage whether the section is read-only, as input |
| 5235 | sections have not yet been mapped to output sections. |
| 5236 | Tentatively set the flag for now, and correct in |
| 5237 | adjust_dynamic_symbol. */ |
| 5238 | h->non_got_ref = 1; |
| 5239 | h->plt.refcount += 1; |
| 5240 | h->pointer_equality_needed = 1; |
| 5241 | } |
| 5242 | /* FIXME:: RR need to handle these in shared libraries |
| 5243 | and essentially bomb out as these being non-PIC |
| 5244 | relocations in shared libraries. */ |
| 5245 | break; |
| 5246 | |
| 5247 | case R_AARCH64_CALL26: |
| 5248 | case R_AARCH64_JUMP26: |
| 5249 | /* If this is a local symbol then we resolve it |
| 5250 | directly without creating a PLT entry. */ |
| 5251 | if (h == NULL) |
| 5252 | continue; |
| 5253 | |
| 5254 | h->needs_plt = 1; |
| 5255 | h->plt.refcount += 1; |
| 5256 | break; |
| 5257 | } |
| 5258 | } |
| 5259 | return TRUE; |
| 5260 | } |
| 5261 | |
| 5262 | /* Treat mapping symbols as special target symbols. */ |
| 5263 | |
| 5264 | static bfd_boolean |
| 5265 | elf64_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
| 5266 | asymbol *sym) |
| 5267 | { |
| 5268 | return bfd_is_aarch64_special_symbol_name (sym->name, |
| 5269 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); |
| 5270 | } |
| 5271 | |
| 5272 | /* This is a copy of elf_find_function () from elf.c except that |
| 5273 | AArch64 mapping symbols are ignored when looking for function names. */ |
| 5274 | |
| 5275 | static bfd_boolean |
| 5276 | aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, |
| 5277 | asection *section, |
| 5278 | asymbol **symbols, |
| 5279 | bfd_vma offset, |
| 5280 | const char **filename_ptr, |
| 5281 | const char **functionname_ptr) |
| 5282 | { |
| 5283 | const char *filename = NULL; |
| 5284 | asymbol *func = NULL; |
| 5285 | bfd_vma low_func = 0; |
| 5286 | asymbol **p; |
| 5287 | |
| 5288 | for (p = symbols; *p != NULL; p++) |
| 5289 | { |
| 5290 | elf_symbol_type *q; |
| 5291 | |
| 5292 | q = (elf_symbol_type *) * p; |
| 5293 | |
| 5294 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| 5295 | { |
| 5296 | default: |
| 5297 | break; |
| 5298 | case STT_FILE: |
| 5299 | filename = bfd_asymbol_name (&q->symbol); |
| 5300 | break; |
| 5301 | case STT_FUNC: |
| 5302 | case STT_NOTYPE: |
| 5303 | /* Skip mapping symbols. */ |
| 5304 | if ((q->symbol.flags & BSF_LOCAL) |
| 5305 | && (bfd_is_aarch64_special_symbol_name |
| 5306 | (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))) |
| 5307 | continue; |
| 5308 | /* Fall through. */ |
| 5309 | if (bfd_get_section (&q->symbol) == section |
| 5310 | && q->symbol.value >= low_func && q->symbol.value <= offset) |
| 5311 | { |
| 5312 | func = (asymbol *) q; |
| 5313 | low_func = q->symbol.value; |
| 5314 | } |
| 5315 | break; |
| 5316 | } |
| 5317 | } |
| 5318 | |
| 5319 | if (func == NULL) |
| 5320 | return FALSE; |
| 5321 | |
| 5322 | if (filename_ptr) |
| 5323 | *filename_ptr = filename; |
| 5324 | if (functionname_ptr) |
| 5325 | *functionname_ptr = bfd_asymbol_name (func); |
| 5326 | |
| 5327 | return TRUE; |
| 5328 | } |
| 5329 | |
| 5330 | |
| 5331 | /* Find the nearest line to a particular section and offset, for error |
| 5332 | reporting. This code is a duplicate of the code in elf.c, except |
| 5333 | that it uses aarch64_elf_find_function. */ |
| 5334 | |
| 5335 | static bfd_boolean |
| 5336 | elf64_aarch64_find_nearest_line (bfd *abfd, |
| 5337 | asection *section, |
| 5338 | asymbol **symbols, |
| 5339 | bfd_vma offset, |
| 5340 | const char **filename_ptr, |
| 5341 | const char **functionname_ptr, |
| 5342 | unsigned int *line_ptr) |
| 5343 | { |
| 5344 | bfd_boolean found = FALSE; |
| 5345 | |
| 5346 | /* We skip _bfd_dwarf1_find_nearest_line since no known AArch64 |
| 5347 | toolchain uses it. */ |
| 5348 | |
| 5349 | if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections, |
| 5350 | section, symbols, offset, |
| 5351 | filename_ptr, functionname_ptr, |
| 5352 | line_ptr, NULL, 0, |
| 5353 | &elf_tdata (abfd)->dwarf2_find_line_info)) |
| 5354 | { |
| 5355 | if (!*functionname_ptr) |
| 5356 | aarch64_elf_find_function (abfd, section, symbols, offset, |
| 5357 | *filename_ptr ? NULL : filename_ptr, |
| 5358 | functionname_ptr); |
| 5359 | |
| 5360 | return TRUE; |
| 5361 | } |
| 5362 | |
| 5363 | if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 5364 | &found, filename_ptr, |
| 5365 | functionname_ptr, line_ptr, |
| 5366 | &elf_tdata (abfd)->line_info)) |
| 5367 | return FALSE; |
| 5368 | |
| 5369 | if (found && (*functionname_ptr || *line_ptr)) |
| 5370 | return TRUE; |
| 5371 | |
| 5372 | if (symbols == NULL) |
| 5373 | return FALSE; |
| 5374 | |
| 5375 | if (!aarch64_elf_find_function (abfd, section, symbols, offset, |
| 5376 | filename_ptr, functionname_ptr)) |
| 5377 | return FALSE; |
| 5378 | |
| 5379 | *line_ptr = 0; |
| 5380 | return TRUE; |
| 5381 | } |
| 5382 | |
| 5383 | static bfd_boolean |
| 5384 | elf64_aarch64_find_inliner_info (bfd *abfd, |
| 5385 | const char **filename_ptr, |
| 5386 | const char **functionname_ptr, |
| 5387 | unsigned int *line_ptr) |
| 5388 | { |
| 5389 | bfd_boolean found; |
| 5390 | found = _bfd_dwarf2_find_inliner_info |
| 5391 | (abfd, filename_ptr, |
| 5392 | functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); |
| 5393 | return found; |
| 5394 | } |
| 5395 | |
| 5396 | |
| 5397 | static void |
| 5398 | elf64_aarch64_post_process_headers (bfd *abfd, |
| 5399 | struct bfd_link_info *link_info |
| 5400 | ATTRIBUTE_UNUSED) |
| 5401 | { |
| 5402 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ |
| 5403 | |
| 5404 | i_ehdrp = elf_elfheader (abfd); |
| 5405 | i_ehdrp->e_ident[EI_OSABI] = 0; |
| 5406 | i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; |
| 5407 | } |
| 5408 | |
| 5409 | static enum elf_reloc_type_class |
| 5410 | elf64_aarch64_reloc_type_class (const Elf_Internal_Rela *rela) |
| 5411 | { |
| 5412 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
| 5413 | { |
| 5414 | case R_AARCH64_RELATIVE: |
| 5415 | return reloc_class_relative; |
| 5416 | case R_AARCH64_JUMP_SLOT: |
| 5417 | return reloc_class_plt; |
| 5418 | case R_AARCH64_COPY: |
| 5419 | return reloc_class_copy; |
| 5420 | default: |
| 5421 | return reloc_class_normal; |
| 5422 | } |
| 5423 | } |
| 5424 | |
| 5425 | /* Set the right machine number for an AArch64 ELF file. */ |
| 5426 | |
| 5427 | static bfd_boolean |
| 5428 | elf64_aarch64_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
| 5429 | { |
| 5430 | if (hdr->sh_type == SHT_NOTE) |
| 5431 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; |
| 5432 | |
| 5433 | return TRUE; |
| 5434 | } |
| 5435 | |
| 5436 | /* Handle an AArch64 specific section when reading an object file. This is |
| 5437 | called when bfd_section_from_shdr finds a section with an unknown |
| 5438 | type. */ |
| 5439 | |
| 5440 | static bfd_boolean |
| 5441 | elf64_aarch64_section_from_shdr (bfd *abfd, |
| 5442 | Elf_Internal_Shdr *hdr, |
| 5443 | const char *name, int shindex) |
| 5444 | { |
| 5445 | /* There ought to be a place to keep ELF backend specific flags, but |
| 5446 | at the moment there isn't one. We just keep track of the |
| 5447 | sections by their name, instead. Fortunately, the ABI gives |
| 5448 | names for all the AArch64 specific sections, so we will probably get |
| 5449 | away with this. */ |
| 5450 | switch (hdr->sh_type) |
| 5451 | { |
| 5452 | case SHT_AARCH64_ATTRIBUTES: |
| 5453 | break; |
| 5454 | |
| 5455 | default: |
| 5456 | return FALSE; |
| 5457 | } |
| 5458 | |
| 5459 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 5460 | return FALSE; |
| 5461 | |
| 5462 | return TRUE; |
| 5463 | } |
| 5464 | |
| 5465 | /* A structure used to record a list of sections, independently |
| 5466 | of the next and prev fields in the asection structure. */ |
| 5467 | typedef struct section_list |
| 5468 | { |
| 5469 | asection *sec; |
| 5470 | struct section_list *next; |
| 5471 | struct section_list *prev; |
| 5472 | } |
| 5473 | section_list; |
| 5474 | |
| 5475 | /* Unfortunately we need to keep a list of sections for which |
| 5476 | an _aarch64_elf_section_data structure has been allocated. This |
| 5477 | is because it is possible for functions like elf64_aarch64_write_section |
| 5478 | to be called on a section which has had an elf_data_structure |
| 5479 | allocated for it (and so the used_by_bfd field is valid) but |
| 5480 | for which the AArch64 extended version of this structure - the |
| 5481 | _aarch64_elf_section_data structure - has not been allocated. */ |
| 5482 | static section_list *sections_with_aarch64_elf_section_data = NULL; |
| 5483 | |
| 5484 | static void |
| 5485 | record_section_with_aarch64_elf_section_data (asection *sec) |
| 5486 | { |
| 5487 | struct section_list *entry; |
| 5488 | |
| 5489 | entry = bfd_malloc (sizeof (*entry)); |
| 5490 | if (entry == NULL) |
| 5491 | return; |
| 5492 | entry->sec = sec; |
| 5493 | entry->next = sections_with_aarch64_elf_section_data; |
| 5494 | entry->prev = NULL; |
| 5495 | if (entry->next != NULL) |
| 5496 | entry->next->prev = entry; |
| 5497 | sections_with_aarch64_elf_section_data = entry; |
| 5498 | } |
| 5499 | |
| 5500 | static struct section_list * |
| 5501 | find_aarch64_elf_section_entry (asection *sec) |
| 5502 | { |
| 5503 | struct section_list *entry; |
| 5504 | static struct section_list *last_entry = NULL; |
| 5505 | |
| 5506 | /* This is a short cut for the typical case where the sections are added |
| 5507 | to the sections_with_aarch64_elf_section_data list in forward order and |
| 5508 | then looked up here in backwards order. This makes a real difference |
| 5509 | to the ld-srec/sec64k.exp linker test. */ |
| 5510 | entry = sections_with_aarch64_elf_section_data; |
| 5511 | if (last_entry != NULL) |
| 5512 | { |
| 5513 | if (last_entry->sec == sec) |
| 5514 | entry = last_entry; |
| 5515 | else if (last_entry->next != NULL && last_entry->next->sec == sec) |
| 5516 | entry = last_entry->next; |
| 5517 | } |
| 5518 | |
| 5519 | for (; entry; entry = entry->next) |
| 5520 | if (entry->sec == sec) |
| 5521 | break; |
| 5522 | |
| 5523 | if (entry) |
| 5524 | /* Record the entry prior to this one - it is the entry we are |
| 5525 | most likely to want to locate next time. Also this way if we |
| 5526 | have been called from |
| 5527 | unrecord_section_with_aarch64_elf_section_data () we will not |
| 5528 | be caching a pointer that is about to be freed. */ |
| 5529 | last_entry = entry->prev; |
| 5530 | |
| 5531 | return entry; |
| 5532 | } |
| 5533 | |
| 5534 | static void |
| 5535 | unrecord_section_with_aarch64_elf_section_data (asection *sec) |
| 5536 | { |
| 5537 | struct section_list *entry; |
| 5538 | |
| 5539 | entry = find_aarch64_elf_section_entry (sec); |
| 5540 | |
| 5541 | if (entry) |
| 5542 | { |
| 5543 | if (entry->prev != NULL) |
| 5544 | entry->prev->next = entry->next; |
| 5545 | if (entry->next != NULL) |
| 5546 | entry->next->prev = entry->prev; |
| 5547 | if (entry == sections_with_aarch64_elf_section_data) |
| 5548 | sections_with_aarch64_elf_section_data = entry->next; |
| 5549 | free (entry); |
| 5550 | } |
| 5551 | } |
| 5552 | |
| 5553 | |
| 5554 | typedef struct |
| 5555 | { |
| 5556 | void *finfo; |
| 5557 | struct bfd_link_info *info; |
| 5558 | asection *sec; |
| 5559 | int sec_shndx; |
| 5560 | int (*func) (void *, const char *, Elf_Internal_Sym *, |
| 5561 | asection *, struct elf_link_hash_entry *); |
| 5562 | } output_arch_syminfo; |
| 5563 | |
| 5564 | enum map_symbol_type |
| 5565 | { |
| 5566 | AARCH64_MAP_INSN, |
| 5567 | AARCH64_MAP_DATA |
| 5568 | }; |
| 5569 | |
| 5570 | |
| 5571 | /* Output a single mapping symbol. */ |
| 5572 | |
| 5573 | static bfd_boolean |
| 5574 | elf64_aarch64_output_map_sym (output_arch_syminfo *osi, |
| 5575 | enum map_symbol_type type, bfd_vma offset) |
| 5576 | { |
| 5577 | static const char *names[2] = { "$x", "$d" }; |
| 5578 | Elf_Internal_Sym sym; |
| 5579 | |
| 5580 | sym.st_value = (osi->sec->output_section->vma |
| 5581 | + osi->sec->output_offset + offset); |
| 5582 | sym.st_size = 0; |
| 5583 | sym.st_other = 0; |
| 5584 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 5585 | sym.st_shndx = osi->sec_shndx; |
| 5586 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; |
| 5587 | } |
| 5588 | |
| 5589 | |
| 5590 | |
| 5591 | /* Output mapping symbols for PLT entries associated with H. */ |
| 5592 | |
| 5593 | static bfd_boolean |
| 5594 | elf64_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf) |
| 5595 | { |
| 5596 | output_arch_syminfo *osi = (output_arch_syminfo *) inf; |
| 5597 | bfd_vma addr; |
| 5598 | |
| 5599 | if (h->root.type == bfd_link_hash_indirect) |
| 5600 | return TRUE; |
| 5601 | |
| 5602 | if (h->root.type == bfd_link_hash_warning) |
| 5603 | /* When warning symbols are created, they **replace** the "real" |
| 5604 | entry in the hash table, thus we never get to see the real |
| 5605 | symbol in a hash traversal. So look at it now. */ |
| 5606 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5607 | |
| 5608 | if (h->plt.offset == (bfd_vma) - 1) |
| 5609 | return TRUE; |
| 5610 | |
| 5611 | addr = h->plt.offset; |
| 5612 | if (addr == 32) |
| 5613 | { |
| 5614 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 5615 | return FALSE; |
| 5616 | } |
| 5617 | return TRUE; |
| 5618 | } |
| 5619 | |
| 5620 | |
| 5621 | /* Output a single local symbol for a generated stub. */ |
| 5622 | |
| 5623 | static bfd_boolean |
| 5624 | elf64_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, |
| 5625 | bfd_vma offset, bfd_vma size) |
| 5626 | { |
| 5627 | Elf_Internal_Sym sym; |
| 5628 | |
| 5629 | sym.st_value = (osi->sec->output_section->vma |
| 5630 | + osi->sec->output_offset + offset); |
| 5631 | sym.st_size = size; |
| 5632 | sym.st_other = 0; |
| 5633 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 5634 | sym.st_shndx = osi->sec_shndx; |
| 5635 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; |
| 5636 | } |
| 5637 | |
| 5638 | static bfd_boolean |
| 5639 | aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| 5640 | { |
| 5641 | struct elf64_aarch64_stub_hash_entry *stub_entry; |
| 5642 | asection *stub_sec; |
| 5643 | bfd_vma addr; |
| 5644 | char *stub_name; |
| 5645 | output_arch_syminfo *osi; |
| 5646 | |
| 5647 | /* Massage our args to the form they really have. */ |
| 5648 | stub_entry = (struct elf64_aarch64_stub_hash_entry *) gen_entry; |
| 5649 | osi = (output_arch_syminfo *) in_arg; |
| 5650 | |
| 5651 | stub_sec = stub_entry->stub_sec; |
| 5652 | |
| 5653 | /* Ensure this stub is attached to the current section being |
| 5654 | processed. */ |
| 5655 | if (stub_sec != osi->sec) |
| 5656 | return TRUE; |
| 5657 | |
| 5658 | addr = (bfd_vma) stub_entry->stub_offset; |
| 5659 | |
| 5660 | stub_name = stub_entry->output_name; |
| 5661 | |
| 5662 | switch (stub_entry->stub_type) |
| 5663 | { |
| 5664 | case aarch64_stub_adrp_branch: |
| 5665 | if (!elf64_aarch64_output_stub_sym (osi, stub_name, addr, |
| 5666 | sizeof (aarch64_adrp_branch_stub))) |
| 5667 | return FALSE; |
| 5668 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 5669 | return FALSE; |
| 5670 | break; |
| 5671 | case aarch64_stub_long_branch: |
| 5672 | if (!elf64_aarch64_output_stub_sym |
| 5673 | (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) |
| 5674 | return FALSE; |
| 5675 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 5676 | return FALSE; |
| 5677 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) |
| 5678 | return FALSE; |
| 5679 | break; |
| 5680 | default: |
| 5681 | BFD_FAIL (); |
| 5682 | } |
| 5683 | |
| 5684 | return TRUE; |
| 5685 | } |
| 5686 | |
| 5687 | /* Output mapping symbols for linker generated sections. */ |
| 5688 | |
| 5689 | static bfd_boolean |
| 5690 | elf64_aarch64_output_arch_local_syms (bfd *output_bfd, |
| 5691 | struct bfd_link_info *info, |
| 5692 | void *finfo, |
| 5693 | int (*func) (void *, const char *, |
| 5694 | Elf_Internal_Sym *, |
| 5695 | asection *, |
| 5696 | struct elf_link_hash_entry |
| 5697 | *)) |
| 5698 | { |
| 5699 | output_arch_syminfo osi; |
| 5700 | struct elf64_aarch64_link_hash_table *htab; |
| 5701 | |
| 5702 | htab = elf64_aarch64_hash_table (info); |
| 5703 | |
| 5704 | osi.finfo = finfo; |
| 5705 | osi.info = info; |
| 5706 | osi.func = func; |
| 5707 | |
| 5708 | /* Long calls stubs. */ |
| 5709 | if (htab->stub_bfd && htab->stub_bfd->sections) |
| 5710 | { |
| 5711 | asection *stub_sec; |
| 5712 | |
| 5713 | for (stub_sec = htab->stub_bfd->sections; |
| 5714 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 5715 | { |
| 5716 | /* Ignore non-stub sections. */ |
| 5717 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 5718 | continue; |
| 5719 | |
| 5720 | osi.sec = stub_sec; |
| 5721 | |
| 5722 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 5723 | (output_bfd, osi.sec->output_section); |
| 5724 | |
| 5725 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, |
| 5726 | &osi); |
| 5727 | } |
| 5728 | } |
| 5729 | |
| 5730 | /* Finally, output mapping symbols for the PLT. */ |
| 5731 | if (!htab->root.splt || htab->root.splt->size == 0) |
| 5732 | return TRUE; |
| 5733 | |
| 5734 | /* For now live without mapping symbols for the plt. */ |
| 5735 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 5736 | (output_bfd, htab->root.splt->output_section); |
| 5737 | osi.sec = htab->root.splt; |
| 5738 | |
| 5739 | elf_link_hash_traverse (&htab->root, elf64_aarch64_output_plt_map, |
| 5740 | (void *) &osi); |
| 5741 | |
| 5742 | return TRUE; |
| 5743 | |
| 5744 | } |
| 5745 | |
| 5746 | /* Allocate target specific section data. */ |
| 5747 | |
| 5748 | static bfd_boolean |
| 5749 | elf64_aarch64_new_section_hook (bfd *abfd, asection *sec) |
| 5750 | { |
| 5751 | if (!sec->used_by_bfd) |
| 5752 | { |
| 5753 | _aarch64_elf_section_data *sdata; |
| 5754 | bfd_size_type amt = sizeof (*sdata); |
| 5755 | |
| 5756 | sdata = bfd_zalloc (abfd, amt); |
| 5757 | if (sdata == NULL) |
| 5758 | return FALSE; |
| 5759 | sec->used_by_bfd = sdata; |
| 5760 | } |
| 5761 | |
| 5762 | record_section_with_aarch64_elf_section_data (sec); |
| 5763 | |
| 5764 | return _bfd_elf_new_section_hook (abfd, sec); |
| 5765 | } |
| 5766 | |
| 5767 | |
| 5768 | static void |
| 5769 | unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 5770 | asection *sec, |
| 5771 | void *ignore ATTRIBUTE_UNUSED) |
| 5772 | { |
| 5773 | unrecord_section_with_aarch64_elf_section_data (sec); |
| 5774 | } |
| 5775 | |
| 5776 | static bfd_boolean |
| 5777 | elf64_aarch64_close_and_cleanup (bfd *abfd) |
| 5778 | { |
| 5779 | if (abfd->sections) |
| 5780 | bfd_map_over_sections (abfd, |
| 5781 | unrecord_section_via_map_over_sections, NULL); |
| 5782 | |
| 5783 | return _bfd_elf_close_and_cleanup (abfd); |
| 5784 | } |
| 5785 | |
| 5786 | static bfd_boolean |
| 5787 | elf64_aarch64_bfd_free_cached_info (bfd *abfd) |
| 5788 | { |
| 5789 | if (abfd->sections) |
| 5790 | bfd_map_over_sections (abfd, |
| 5791 | unrecord_section_via_map_over_sections, NULL); |
| 5792 | |
| 5793 | return _bfd_free_cached_info (abfd); |
| 5794 | } |
| 5795 | |
| 5796 | static bfd_boolean |
| 5797 | elf64_aarch64_is_function_type (unsigned int type) |
| 5798 | { |
| 5799 | return type == STT_FUNC; |
| 5800 | } |
| 5801 | |
| 5802 | /* Create dynamic sections. This is different from the ARM backend in that |
| 5803 | the got, plt, gotplt and their relocation sections are all created in the |
| 5804 | standard part of the bfd elf backend. */ |
| 5805 | |
| 5806 | static bfd_boolean |
| 5807 | elf64_aarch64_create_dynamic_sections (bfd *dynobj, |
| 5808 | struct bfd_link_info *info) |
| 5809 | { |
| 5810 | struct elf64_aarch64_link_hash_table *htab; |
| 5811 | struct elf_link_hash_entry *h; |
| 5812 | |
| 5813 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 5814 | return FALSE; |
| 5815 | |
| 5816 | htab = elf64_aarch64_hash_table (info); |
| 5817 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
| 5818 | if (!info->shared) |
| 5819 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 5820 | |
| 5821 | if (!htab->sdynbss || (!info->shared && !htab->srelbss)) |
| 5822 | abort (); |
| 5823 | |
| 5824 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the |
| 5825 | dynobj's .got section. We don't do this in the linker script |
| 5826 | because we don't want to define the symbol if we are not creating |
| 5827 | a global offset table. */ |
| 5828 | h = _bfd_elf_define_linkage_sym (dynobj, info, |
| 5829 | htab->root.sgot, "_GLOBAL_OFFSET_TABLE_"); |
| 5830 | elf_hash_table (info)->hgot = h; |
| 5831 | if (h == NULL) |
| 5832 | return FALSE; |
| 5833 | |
| 5834 | return TRUE; |
| 5835 | } |
| 5836 | |
| 5837 | |
| 5838 | /* Allocate space in .plt, .got and associated reloc sections for |
| 5839 | dynamic relocs. */ |
| 5840 | |
| 5841 | static bfd_boolean |
| 5842 | elf64_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 5843 | { |
| 5844 | struct bfd_link_info *info; |
| 5845 | struct elf64_aarch64_link_hash_table *htab; |
| 5846 | struct elf64_aarch64_link_hash_entry *eh; |
| 5847 | struct elf_dyn_relocs *p; |
| 5848 | |
| 5849 | /* An example of a bfd_link_hash_indirect symbol is versioned |
| 5850 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| 5851 | -> __gxx_personality_v0(bfd_link_hash_defined) |
| 5852 | |
| 5853 | There is no need to process bfd_link_hash_indirect symbols here |
| 5854 | because we will also be presented with the concrete instance of |
| 5855 | the symbol and elf64_aarch64_copy_indirect_symbol () will have been |
| 5856 | called to copy all relevant data from the generic to the concrete |
| 5857 | symbol instance. |
| 5858 | */ |
| 5859 | if (h->root.type == bfd_link_hash_indirect) |
| 5860 | return TRUE; |
| 5861 | |
| 5862 | if (h->root.type == bfd_link_hash_warning) |
| 5863 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5864 | |
| 5865 | info = (struct bfd_link_info *) inf; |
| 5866 | htab = elf64_aarch64_hash_table (info); |
| 5867 | |
| 5868 | if (htab->root.dynamic_sections_created && h->plt.refcount > 0) |
| 5869 | { |
| 5870 | /* Make sure this symbol is output as a dynamic symbol. |
| 5871 | Undefined weak syms won't yet be marked as dynamic. */ |
| 5872 | if (h->dynindx == -1 && !h->forced_local) |
| 5873 | { |
| 5874 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5875 | return FALSE; |
| 5876 | } |
| 5877 | |
| 5878 | if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 5879 | { |
| 5880 | asection *s = htab->root.splt; |
| 5881 | |
| 5882 | /* If this is the first .plt entry, make room for the special |
| 5883 | first entry. */ |
| 5884 | if (s->size == 0) |
| 5885 | s->size += htab->plt_header_size; |
| 5886 | |
| 5887 | h->plt.offset = s->size; |
| 5888 | |
| 5889 | /* If this symbol is not defined in a regular file, and we are |
| 5890 | not generating a shared library, then set the symbol to this |
| 5891 | location in the .plt. This is required to make function |
| 5892 | pointers compare as equal between the normal executable and |
| 5893 | the shared library. */ |
| 5894 | if (!info->shared && !h->def_regular) |
| 5895 | { |
| 5896 | h->root.u.def.section = s; |
| 5897 | h->root.u.def.value = h->plt.offset; |
| 5898 | } |
| 5899 | |
| 5900 | /* Make room for this entry. For now we only create the |
| 5901 | small model PLT entries. We later need to find a way |
| 5902 | of relaxing into these from the large model PLT entries. */ |
| 5903 | s->size += PLT_SMALL_ENTRY_SIZE; |
| 5904 | |
| 5905 | /* We also need to make an entry in the .got.plt section, which |
| 5906 | will be placed in the .got section by the linker script. */ |
| 5907 | htab->root.sgotplt->size += GOT_ENTRY_SIZE; |
| 5908 | |
| 5909 | /* We also need to make an entry in the .rela.plt section. */ |
| 5910 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 5911 | |
| 5912 | /* We need to ensure that all GOT entries that serve the PLT |
| 5913 | are consecutive with the special GOT slots [0] [1] and |
| 5914 | [2]. Any addtional relocations, such as |
| 5915 | R_AARCH64_TLSDESC, must be placed after the PLT related |
| 5916 | entries. We abuse the reloc_count such that during |
| 5917 | sizing we adjust reloc_count to indicate the number of |
| 5918 | PLT related reserved entries. In subsequent phases when |
| 5919 | filling in the contents of the reloc entries, PLT related |
| 5920 | entries are placed by computing their PLT index (0 |
| 5921 | .. reloc_count). While other none PLT relocs are placed |
| 5922 | at the slot indicated by reloc_count and reloc_count is |
| 5923 | updated. */ |
| 5924 | |
| 5925 | htab->root.srelplt->reloc_count++; |
| 5926 | } |
| 5927 | else |
| 5928 | { |
| 5929 | h->plt.offset = (bfd_vma) - 1; |
| 5930 | h->needs_plt = 0; |
| 5931 | } |
| 5932 | } |
| 5933 | else |
| 5934 | { |
| 5935 | h->plt.offset = (bfd_vma) - 1; |
| 5936 | h->needs_plt = 0; |
| 5937 | } |
| 5938 | |
| 5939 | eh = (struct elf64_aarch64_link_hash_entry *) h; |
| 5940 | eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 5941 | |
| 5942 | if (h->got.refcount > 0) |
| 5943 | { |
| 5944 | bfd_boolean dyn; |
| 5945 | unsigned got_type = elf64_aarch64_hash_entry (h)->got_type; |
| 5946 | |
| 5947 | h->got.offset = (bfd_vma) - 1; |
| 5948 | |
| 5949 | dyn = htab->root.dynamic_sections_created; |
| 5950 | |
| 5951 | /* Make sure this symbol is output as a dynamic symbol. |
| 5952 | Undefined weak syms won't yet be marked as dynamic. */ |
| 5953 | if (dyn && h->dynindx == -1 && !h->forced_local) |
| 5954 | { |
| 5955 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5956 | return FALSE; |
| 5957 | } |
| 5958 | |
| 5959 | if (got_type == GOT_UNKNOWN) |
| 5960 | { |
| 5961 | } |
| 5962 | else if (got_type == GOT_NORMAL) |
| 5963 | { |
| 5964 | h->got.offset = htab->root.sgot->size; |
| 5965 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 5966 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5967 | || h->root.type != bfd_link_hash_undefweak) |
| 5968 | && (info->shared |
| 5969 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 5970 | { |
| 5971 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 5972 | } |
| 5973 | } |
| 5974 | else |
| 5975 | { |
| 5976 | int indx; |
| 5977 | if (got_type & GOT_TLSDESC_GD) |
| 5978 | { |
| 5979 | eh->tlsdesc_got_jump_table_offset = |
| 5980 | (htab->root.sgotplt->size |
| 5981 | - aarch64_compute_jump_table_size (htab)); |
| 5982 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| 5983 | h->got.offset = (bfd_vma) - 2; |
| 5984 | } |
| 5985 | |
| 5986 | if (got_type & GOT_TLS_GD) |
| 5987 | { |
| 5988 | h->got.offset = htab->root.sgot->size; |
| 5989 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| 5990 | } |
| 5991 | |
| 5992 | if (got_type & GOT_TLS_IE) |
| 5993 | { |
| 5994 | h->got.offset = htab->root.sgot->size; |
| 5995 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 5996 | } |
| 5997 | |
| 5998 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 5999 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6000 | || h->root.type != bfd_link_hash_undefweak) |
| 6001 | && (info->shared |
| 6002 | || indx != 0 |
| 6003 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 6004 | { |
| 6005 | if (got_type & GOT_TLSDESC_GD) |
| 6006 | { |
| 6007 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 6008 | /* Note reloc_count not incremented here! We have |
| 6009 | already adjusted reloc_count for this relocation |
| 6010 | type. */ |
| 6011 | |
| 6012 | /* TLSDESC PLT is now needed, but not yet determined. */ |
| 6013 | htab->tlsdesc_plt = (bfd_vma) - 1; |
| 6014 | } |
| 6015 | |
| 6016 | if (got_type & GOT_TLS_GD) |
| 6017 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| 6018 | |
| 6019 | if (got_type & GOT_TLS_IE) |
| 6020 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 6021 | } |
| 6022 | } |
| 6023 | } |
| 6024 | else |
| 6025 | { |
| 6026 | h->got.offset = (bfd_vma) - 1; |
| 6027 | } |
| 6028 | |
| 6029 | if (eh->dyn_relocs == NULL) |
| 6030 | return TRUE; |
| 6031 | |
| 6032 | /* In the shared -Bsymbolic case, discard space allocated for |
| 6033 | dynamic pc-relative relocs against symbols which turn out to be |
| 6034 | defined in regular objects. For the normal shared case, discard |
| 6035 | space for pc-relative relocs that have become local due to symbol |
| 6036 | visibility changes. */ |
| 6037 | |
| 6038 | if (info->shared) |
| 6039 | { |
| 6040 | /* Relocs that use pc_count are those that appear on a call |
| 6041 | insn, or certain REL relocs that can generated via assembly. |
| 6042 | We want calls to protected symbols to resolve directly to the |
| 6043 | function rather than going via the plt. If people want |
| 6044 | function pointer comparisons to work as expected then they |
| 6045 | should avoid writing weird assembly. */ |
| 6046 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 6047 | { |
| 6048 | struct elf_dyn_relocs **pp; |
| 6049 | |
| 6050 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) |
| 6051 | { |
| 6052 | p->count -= p->pc_count; |
| 6053 | p->pc_count = 0; |
| 6054 | if (p->count == 0) |
| 6055 | *pp = p->next; |
| 6056 | else |
| 6057 | pp = &p->next; |
| 6058 | } |
| 6059 | } |
| 6060 | |
| 6061 | /* Also discard relocs on undefined weak syms with non-default |
| 6062 | visibility. */ |
| 6063 | if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) |
| 6064 | { |
| 6065 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 6066 | eh->dyn_relocs = NULL; |
| 6067 | |
| 6068 | /* Make sure undefined weak symbols are output as a dynamic |
| 6069 | symbol in PIEs. */ |
| 6070 | else if (h->dynindx == -1 |
| 6071 | && !h->forced_local |
| 6072 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6073 | return FALSE; |
| 6074 | } |
| 6075 | |
| 6076 | } |
| 6077 | else if (ELIMINATE_COPY_RELOCS) |
| 6078 | { |
| 6079 | /* For the non-shared case, discard space for relocs against |
| 6080 | symbols which turn out to need copy relocs or are not |
| 6081 | dynamic. */ |
| 6082 | |
| 6083 | if (!h->non_got_ref |
| 6084 | && ((h->def_dynamic |
| 6085 | && !h->def_regular) |
| 6086 | || (htab->root.dynamic_sections_created |
| 6087 | && (h->root.type == bfd_link_hash_undefweak |
| 6088 | || h->root.type == bfd_link_hash_undefined)))) |
| 6089 | { |
| 6090 | /* Make sure this symbol is output as a dynamic symbol. |
| 6091 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6092 | if (h->dynindx == -1 |
| 6093 | && !h->forced_local |
| 6094 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6095 | return FALSE; |
| 6096 | |
| 6097 | /* If that succeeded, we know we'll be keeping all the |
| 6098 | relocs. */ |
| 6099 | if (h->dynindx != -1) |
| 6100 | goto keep; |
| 6101 | } |
| 6102 | |
| 6103 | eh->dyn_relocs = NULL; |
| 6104 | |
| 6105 | keep:; |
| 6106 | } |
| 6107 | |
| 6108 | /* Finally, allocate space. */ |
| 6109 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 6110 | { |
| 6111 | asection *sreloc; |
| 6112 | |
| 6113 | sreloc = elf_section_data (p->sec)->sreloc; |
| 6114 | |
| 6115 | BFD_ASSERT (sreloc != NULL); |
| 6116 | |
| 6117 | sreloc->size += p->count * RELOC_SIZE (htab); |
| 6118 | } |
| 6119 | |
| 6120 | return TRUE; |
| 6121 | } |
| 6122 | |
| 6123 | |
| 6124 | |
| 6125 | |
| 6126 | /* This is the most important function of all . Innocuosly named |
| 6127 | though ! */ |
| 6128 | static bfd_boolean |
| 6129 | elf64_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 6130 | struct bfd_link_info *info) |
| 6131 | { |
| 6132 | struct elf64_aarch64_link_hash_table *htab; |
| 6133 | bfd *dynobj; |
| 6134 | asection *s; |
| 6135 | bfd_boolean relocs; |
| 6136 | bfd *ibfd; |
| 6137 | |
| 6138 | htab = elf64_aarch64_hash_table ((info)); |
| 6139 | dynobj = htab->root.dynobj; |
| 6140 | |
| 6141 | BFD_ASSERT (dynobj != NULL); |
| 6142 | |
| 6143 | if (htab->root.dynamic_sections_created) |
| 6144 | { |
| 6145 | if (info->executable) |
| 6146 | { |
| 6147 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 6148 | if (s == NULL) |
| 6149 | abort (); |
| 6150 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 6151 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 6152 | } |
| 6153 | } |
| 6154 | |
| 6155 | /* Set up .got offsets for local syms, and space for local dynamic |
| 6156 | relocs. */ |
| 6157 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 6158 | { |
| 6159 | struct elf_aarch64_local_symbol *locals = NULL; |
| 6160 | Elf_Internal_Shdr *symtab_hdr; |
| 6161 | asection *srel; |
| 6162 | unsigned int i; |
| 6163 | |
| 6164 | if (!is_aarch64_elf (ibfd)) |
| 6165 | continue; |
| 6166 | |
| 6167 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 6168 | { |
| 6169 | struct elf_dyn_relocs *p; |
| 6170 | |
| 6171 | for (p = (struct elf_dyn_relocs *) |
| 6172 | (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) |
| 6173 | { |
| 6174 | if (!bfd_is_abs_section (p->sec) |
| 6175 | && bfd_is_abs_section (p->sec->output_section)) |
| 6176 | { |
| 6177 | /* Input section has been discarded, either because |
| 6178 | it is a copy of a linkonce section or due to |
| 6179 | linker script /DISCARD/, so we'll be discarding |
| 6180 | the relocs too. */ |
| 6181 | } |
| 6182 | else if (p->count != 0) |
| 6183 | { |
| 6184 | srel = elf_section_data (p->sec)->sreloc; |
| 6185 | srel->size += p->count * RELOC_SIZE (htab); |
| 6186 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 6187 | info->flags |= DF_TEXTREL; |
| 6188 | } |
| 6189 | } |
| 6190 | } |
| 6191 | |
| 6192 | locals = elf64_aarch64_locals (ibfd); |
| 6193 | if (!locals) |
| 6194 | continue; |
| 6195 | |
| 6196 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 6197 | srel = htab->root.srelgot; |
| 6198 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 6199 | { |
| 6200 | locals[i].got_offset = (bfd_vma) - 1; |
| 6201 | locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 6202 | if (locals[i].got_refcount > 0) |
| 6203 | { |
| 6204 | unsigned got_type = locals[i].got_type; |
| 6205 | if (got_type & GOT_TLSDESC_GD) |
| 6206 | { |
| 6207 | locals[i].tlsdesc_got_jump_table_offset = |
| 6208 | (htab->root.sgotplt->size |
| 6209 | - aarch64_compute_jump_table_size (htab)); |
| 6210 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| 6211 | locals[i].got_offset = (bfd_vma) - 2; |
| 6212 | } |
| 6213 | |
| 6214 | if (got_type & GOT_TLS_GD) |
| 6215 | { |
| 6216 | locals[i].got_offset = htab->root.sgot->size; |
| 6217 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| 6218 | } |
| 6219 | |
| 6220 | if (got_type & GOT_TLS_IE) |
| 6221 | { |
| 6222 | locals[i].got_offset = htab->root.sgot->size; |
| 6223 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 6224 | } |
| 6225 | |
| 6226 | if (got_type == GOT_UNKNOWN) |
| 6227 | { |
| 6228 | } |
| 6229 | |
| 6230 | if (got_type == GOT_NORMAL) |
| 6231 | { |
| 6232 | } |
| 6233 | |
| 6234 | if (info->shared) |
| 6235 | { |
| 6236 | if (got_type & GOT_TLSDESC_GD) |
| 6237 | { |
| 6238 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 6239 | /* Note RELOC_COUNT not incremented here! */ |
| 6240 | htab->tlsdesc_plt = (bfd_vma) - 1; |
| 6241 | } |
| 6242 | |
| 6243 | if (got_type & GOT_TLS_GD) |
| 6244 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| 6245 | |
| 6246 | if (got_type & GOT_TLS_IE) |
| 6247 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 6248 | } |
| 6249 | } |
| 6250 | else |
| 6251 | { |
| 6252 | locals[i].got_refcount = (bfd_vma) - 1; |
| 6253 | } |
| 6254 | } |
| 6255 | } |
| 6256 | |
| 6257 | |
| 6258 | /* Allocate global sym .plt and .got entries, and space for global |
| 6259 | sym dynamic relocs. */ |
| 6260 | elf_link_hash_traverse (&htab->root, elf64_aarch64_allocate_dynrelocs, |
| 6261 | info); |
| 6262 | |
| 6263 | |
| 6264 | /* For every jump slot reserved in the sgotplt, reloc_count is |
| 6265 | incremented. However, when we reserve space for TLS descriptors, |
| 6266 | it's not incremented, so in order to compute the space reserved |
| 6267 | for them, it suffices to multiply the reloc count by the jump |
| 6268 | slot size. */ |
| 6269 | |
| 6270 | if (htab->root.srelplt) |
| 6271 | htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); |
| 6272 | |
| 6273 | if (htab->tlsdesc_plt) |
| 6274 | { |
| 6275 | if (htab->root.splt->size == 0) |
| 6276 | htab->root.splt->size += PLT_ENTRY_SIZE; |
| 6277 | |
| 6278 | htab->tlsdesc_plt = htab->root.splt->size; |
| 6279 | htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE; |
| 6280 | |
| 6281 | /* If we're not using lazy TLS relocations, don't generate the |
| 6282 | GOT entry required. */ |
| 6283 | if (!(info->flags & DF_BIND_NOW)) |
| 6284 | { |
| 6285 | htab->dt_tlsdesc_got = htab->root.sgot->size; |
| 6286 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 6287 | } |
| 6288 | } |
| 6289 | |
| 6290 | /* We now have determined the sizes of the various dynamic sections. |
| 6291 | Allocate memory for them. */ |
| 6292 | relocs = FALSE; |
| 6293 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 6294 | { |
| 6295 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 6296 | continue; |
| 6297 | |
| 6298 | if (s == htab->root.splt |
| 6299 | || s == htab->root.sgot |
| 6300 | || s == htab->root.sgotplt |
| 6301 | || s == htab->root.iplt |
| 6302 | || s == htab->root.igotplt || s == htab->sdynbss) |
| 6303 | { |
| 6304 | /* Strip this section if we don't need it; see the |
| 6305 | comment below. */ |
| 6306 | } |
| 6307 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 6308 | { |
| 6309 | if (s->size != 0 && s != htab->root.srelplt) |
| 6310 | relocs = TRUE; |
| 6311 | |
| 6312 | /* We use the reloc_count field as a counter if we need |
| 6313 | to copy relocs into the output file. */ |
| 6314 | if (s != htab->root.srelplt) |
| 6315 | s->reloc_count = 0; |
| 6316 | } |
| 6317 | else |
| 6318 | { |
| 6319 | /* It's not one of our sections, so don't allocate space. */ |
| 6320 | continue; |
| 6321 | } |
| 6322 | |
| 6323 | if (s->size == 0) |
| 6324 | { |
| 6325 | /* If we don't need this section, strip it from the |
| 6326 | output file. This is mostly to handle .rela.bss and |
| 6327 | .rela.plt. We must create both sections in |
| 6328 | create_dynamic_sections, because they must be created |
| 6329 | before the linker maps input sections to output |
| 6330 | sections. The linker does that before |
| 6331 | adjust_dynamic_symbol is called, and it is that |
| 6332 | function which decides whether anything needs to go |
| 6333 | into these sections. */ |
| 6334 | |
| 6335 | s->flags |= SEC_EXCLUDE; |
| 6336 | continue; |
| 6337 | } |
| 6338 | |
| 6339 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 6340 | continue; |
| 6341 | |
| 6342 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 6343 | here in case unused entries are not reclaimed before the |
| 6344 | section's contents are written out. This should not happen, |
| 6345 | but this way if it does, we get a R_AARCH64_NONE reloc instead |
| 6346 | of garbage. */ |
| 6347 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 6348 | if (s->contents == NULL) |
| 6349 | return FALSE; |
| 6350 | } |
| 6351 | |
| 6352 | if (htab->root.dynamic_sections_created) |
| 6353 | { |
| 6354 | /* Add some entries to the .dynamic section. We fill in the |
| 6355 | values later, in elf64_aarch64_finish_dynamic_sections, but we |
| 6356 | must add the entries now so that we get the correct size for |
| 6357 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 6358 | dynamic linker and used by the debugger. */ |
| 6359 | #define add_dynamic_entry(TAG, VAL) \ |
| 6360 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 6361 | |
| 6362 | if (info->executable) |
| 6363 | { |
| 6364 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 6365 | return FALSE; |
| 6366 | } |
| 6367 | |
| 6368 | if (htab->root.splt->size != 0) |
| 6369 | { |
| 6370 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 6371 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 6372 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 6373 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 6374 | return FALSE; |
| 6375 | |
| 6376 | if (htab->tlsdesc_plt |
| 6377 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) |
| 6378 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) |
| 6379 | return FALSE; |
| 6380 | } |
| 6381 | |
| 6382 | if (relocs) |
| 6383 | { |
| 6384 | if (!add_dynamic_entry (DT_RELA, 0) |
| 6385 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 6386 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) |
| 6387 | return FALSE; |
| 6388 | |
| 6389 | /* If any dynamic relocs apply to a read-only section, |
| 6390 | then we need a DT_TEXTREL entry. */ |
| 6391 | if ((info->flags & DF_TEXTREL) != 0) |
| 6392 | { |
| 6393 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 6394 | return FALSE; |
| 6395 | } |
| 6396 | } |
| 6397 | } |
| 6398 | #undef add_dynamic_entry |
| 6399 | |
| 6400 | return TRUE; |
| 6401 | |
| 6402 | |
| 6403 | } |
| 6404 | |
| 6405 | static inline void |
| 6406 | elf64_aarch64_update_plt_entry (bfd *output_bfd, |
| 6407 | unsigned int r_type, |
| 6408 | bfd_byte *plt_entry, bfd_vma value) |
| 6409 | { |
| 6410 | reloc_howto_type *howto; |
| 6411 | howto = elf64_aarch64_howto_from_type (r_type); |
| 6412 | bfd_elf_aarch64_put_addend (output_bfd, plt_entry, howto, value); |
| 6413 | } |
| 6414 | |
| 6415 | static void |
| 6416 | elf64_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, |
| 6417 | struct elf64_aarch64_link_hash_table |
| 6418 | *htab, bfd *output_bfd) |
| 6419 | { |
| 6420 | bfd_byte *plt_entry; |
| 6421 | bfd_vma plt_index; |
| 6422 | bfd_vma got_offset; |
| 6423 | bfd_vma gotplt_entry_address; |
| 6424 | bfd_vma plt_entry_address; |
| 6425 | Elf_Internal_Rela rela; |
| 6426 | bfd_byte *loc; |
| 6427 | |
| 6428 | plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; |
| 6429 | |
| 6430 | /* Offset in the GOT is PLT index plus got GOT headers(3) |
| 6431 | times 8. */ |
| 6432 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 6433 | plt_entry = htab->root.splt->contents + h->plt.offset; |
| 6434 | plt_entry_address = htab->root.splt->output_section->vma |
| 6435 | + htab->root.splt->output_section->output_offset + h->plt.offset; |
| 6436 | gotplt_entry_address = htab->root.sgotplt->output_section->vma + |
| 6437 | htab->root.sgotplt->output_offset + got_offset; |
| 6438 | |
| 6439 | /* Copy in the boiler-plate for the PLTn entry. */ |
| 6440 | memcpy (plt_entry, elf64_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE); |
| 6441 | |
| 6442 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| 6443 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 6444 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADR_PREL_PG_HI21, |
| 6445 | plt_entry, |
| 6446 | PG (gotplt_entry_address) - |
| 6447 | PG (plt_entry_address)); |
| 6448 | |
| 6449 | /* Fill in the lo12 bits for the load from the pltgot. */ |
| 6450 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_LDST64_ABS_LO12_NC, |
| 6451 | plt_entry + 4, |
| 6452 | PG_OFFSET (gotplt_entry_address)); |
| 6453 | |
| 6454 | /* Fill in the the lo12 bits for the add from the pltgot entry. */ |
| 6455 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADD_ABS_LO12_NC, |
| 6456 | plt_entry + 8, |
| 6457 | PG_OFFSET (gotplt_entry_address)); |
| 6458 | |
| 6459 | /* All the GOTPLT Entries are essentially initialized to PLT0. */ |
| 6460 | bfd_put_64 (output_bfd, |
| 6461 | (htab->root.splt->output_section->vma |
| 6462 | + htab->root.splt->output_offset), |
| 6463 | htab->root.sgotplt->contents + got_offset); |
| 6464 | |
| 6465 | /* Fill in the entry in the .rela.plt section. */ |
| 6466 | rela.r_offset = gotplt_entry_address; |
| 6467 | rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_JUMP_SLOT); |
| 6468 | rela.r_addend = 0; |
| 6469 | |
| 6470 | /* Compute the relocation entry to used based on PLT index and do |
| 6471 | not adjust reloc_count. The reloc_count has already been adjusted |
| 6472 | to account for this entry. */ |
| 6473 | loc = htab->root.srelplt->contents + plt_index * RELOC_SIZE (htab); |
| 6474 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 6475 | } |
| 6476 | |
| 6477 | /* Size sections even though they're not dynamic. We use it to setup |
| 6478 | _TLS_MODULE_BASE_, if needed. */ |
| 6479 | |
| 6480 | static bfd_boolean |
| 6481 | elf64_aarch64_always_size_sections (bfd *output_bfd, |
| 6482 | struct bfd_link_info *info) |
| 6483 | { |
| 6484 | asection *tls_sec; |
| 6485 | |
| 6486 | if (info->relocatable) |
| 6487 | return TRUE; |
| 6488 | |
| 6489 | tls_sec = elf_hash_table (info)->tls_sec; |
| 6490 | |
| 6491 | if (tls_sec) |
| 6492 | { |
| 6493 | struct elf_link_hash_entry *tlsbase; |
| 6494 | |
| 6495 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), |
| 6496 | "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); |
| 6497 | |
| 6498 | if (tlsbase) |
| 6499 | { |
| 6500 | struct bfd_link_hash_entry *h = NULL; |
| 6501 | const struct elf_backend_data *bed = |
| 6502 | get_elf_backend_data (output_bfd); |
| 6503 | |
| 6504 | if (!(_bfd_generic_link_add_one_symbol |
| 6505 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, |
| 6506 | tls_sec, 0, NULL, FALSE, bed->collect, &h))) |
| 6507 | return FALSE; |
| 6508 | |
| 6509 | tlsbase->type = STT_TLS; |
| 6510 | tlsbase = (struct elf_link_hash_entry *) h; |
| 6511 | tlsbase->def_regular = 1; |
| 6512 | tlsbase->other = STV_HIDDEN; |
| 6513 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
| 6514 | } |
| 6515 | } |
| 6516 | |
| 6517 | return TRUE; |
| 6518 | } |
| 6519 | |
| 6520 | /* Finish up dynamic symbol handling. We set the contents of various |
| 6521 | dynamic sections here. */ |
| 6522 | static bfd_boolean |
| 6523 | elf64_aarch64_finish_dynamic_symbol (bfd *output_bfd, |
| 6524 | struct bfd_link_info *info, |
| 6525 | struct elf_link_hash_entry *h, |
| 6526 | Elf_Internal_Sym *sym) |
| 6527 | { |
| 6528 | struct elf64_aarch64_link_hash_table *htab; |
| 6529 | htab = elf64_aarch64_hash_table (info); |
| 6530 | |
| 6531 | if (h->plt.offset != (bfd_vma) - 1) |
| 6532 | { |
| 6533 | /* This symbol has an entry in the procedure linkage table. Set |
| 6534 | it up. */ |
| 6535 | |
| 6536 | if (h->dynindx == -1 |
| 6537 | || htab->root.splt == NULL |
| 6538 | || htab->root.sgotplt == NULL || htab->root.srelplt == NULL) |
| 6539 | abort (); |
| 6540 | |
| 6541 | elf64_aarch64_create_small_pltn_entry (h, htab, output_bfd); |
| 6542 | if (!h->def_regular) |
| 6543 | { |
| 6544 | /* Mark the symbol as undefined, rather than as defined in |
| 6545 | the .plt section. Leave the value alone. This is a clue |
| 6546 | for the dynamic linker, to make function pointer |
| 6547 | comparisons work between an application and shared |
| 6548 | library. */ |
| 6549 | sym->st_shndx = SHN_UNDEF; |
| 6550 | } |
| 6551 | } |
| 6552 | |
| 6553 | if (h->got.offset != (bfd_vma) - 1 |
| 6554 | && elf64_aarch64_hash_entry (h)->got_type == GOT_NORMAL) |
| 6555 | { |
| 6556 | Elf_Internal_Rela rela; |
| 6557 | bfd_byte *loc; |
| 6558 | |
| 6559 | /* This symbol has an entry in the global offset table. Set it |
| 6560 | up. */ |
| 6561 | if (htab->root.sgot == NULL || htab->root.srelgot == NULL) |
| 6562 | abort (); |
| 6563 | |
| 6564 | rela.r_offset = (htab->root.sgot->output_section->vma |
| 6565 | + htab->root.sgot->output_offset |
| 6566 | + (h->got.offset & ~(bfd_vma) 1)); |
| 6567 | |
| 6568 | if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 6569 | { |
| 6570 | if (!h->def_regular) |
| 6571 | return FALSE; |
| 6572 | |
| 6573 | BFD_ASSERT ((h->got.offset & 1) != 0); |
| 6574 | rela.r_info = ELF64_R_INFO (0, R_AARCH64_RELATIVE); |
| 6575 | rela.r_addend = (h->root.u.def.value |
| 6576 | + h->root.u.def.section->output_section->vma |
| 6577 | + h->root.u.def.section->output_offset); |
| 6578 | } |
| 6579 | else |
| 6580 | { |
| 6581 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 6582 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 6583 | htab->root.sgot->contents + h->got.offset); |
| 6584 | rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_GLOB_DAT); |
| 6585 | rela.r_addend = 0; |
| 6586 | } |
| 6587 | |
| 6588 | loc = htab->root.srelgot->contents; |
| 6589 | loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); |
| 6590 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 6591 | } |
| 6592 | |
| 6593 | if (h->needs_copy) |
| 6594 | { |
| 6595 | Elf_Internal_Rela rela; |
| 6596 | bfd_byte *loc; |
| 6597 | |
| 6598 | /* This symbol needs a copy reloc. Set it up. */ |
| 6599 | |
| 6600 | if (h->dynindx == -1 |
| 6601 | || (h->root.type != bfd_link_hash_defined |
| 6602 | && h->root.type != bfd_link_hash_defweak) |
| 6603 | || htab->srelbss == NULL) |
| 6604 | abort (); |
| 6605 | |
| 6606 | rela.r_offset = (h->root.u.def.value |
| 6607 | + h->root.u.def.section->output_section->vma |
| 6608 | + h->root.u.def.section->output_offset); |
| 6609 | rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_COPY); |
| 6610 | rela.r_addend = 0; |
| 6611 | loc = htab->srelbss->contents; |
| 6612 | loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab); |
| 6613 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 6614 | } |
| 6615 | |
| 6616 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
| 6617 | be NULL for local symbols. */ |
| 6618 | if (sym != NULL |
| 6619 | && (h == elf_hash_table (info)->hdynamic |
| 6620 | || h == elf_hash_table (info)->hgot)) |
| 6621 | sym->st_shndx = SHN_ABS; |
| 6622 | |
| 6623 | return TRUE; |
| 6624 | } |
| 6625 | |
| 6626 | static void |
| 6627 | elf64_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 6628 | struct elf64_aarch64_link_hash_table |
| 6629 | *htab) |
| 6630 | { |
| 6631 | /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between |
| 6632 | small and large plts and at the minute just generates |
| 6633 | the small PLT. */ |
| 6634 | |
| 6635 | /* PLT0 of the small PLT looks like this - |
| 6636 | stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. |
| 6637 | adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT |
| 6638 | ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the |
| 6639 | // symbol resolver |
| 6640 | add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the |
| 6641 | // GOTPLT entry for this. |
| 6642 | br x17 |
| 6643 | */ |
| 6644 | bfd_vma plt_got_base; |
| 6645 | bfd_vma plt_base; |
| 6646 | |
| 6647 | |
| 6648 | memcpy (htab->root.splt->contents, elf64_aarch64_small_plt0_entry, |
| 6649 | PLT_ENTRY_SIZE); |
| 6650 | elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = |
| 6651 | PLT_ENTRY_SIZE; |
| 6652 | |
| 6653 | plt_got_base = (htab->root.sgotplt->output_section->vma |
| 6654 | + htab->root.sgotplt->output_offset); |
| 6655 | |
| 6656 | plt_base = htab->root.splt->output_section->vma + |
| 6657 | htab->root.splt->output_section->output_offset; |
| 6658 | |
| 6659 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| 6660 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 6661 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADR_PREL_PG_HI21, |
| 6662 | htab->root.splt->contents + 4, |
| 6663 | PG (plt_got_base + 16) - PG (plt_base + 4)); |
| 6664 | |
| 6665 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_LDST64_ABS_LO12_NC, |
| 6666 | htab->root.splt->contents + 8, |
| 6667 | PG_OFFSET (plt_got_base + 16)); |
| 6668 | |
| 6669 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADD_ABS_LO12_NC, |
| 6670 | htab->root.splt->contents + 12, |
| 6671 | PG_OFFSET (plt_got_base + 16)); |
| 6672 | } |
| 6673 | |
| 6674 | static bfd_boolean |
| 6675 | elf64_aarch64_finish_dynamic_sections (bfd *output_bfd, |
| 6676 | struct bfd_link_info *info) |
| 6677 | { |
| 6678 | struct elf64_aarch64_link_hash_table *htab; |
| 6679 | bfd *dynobj; |
| 6680 | asection *sdyn; |
| 6681 | |
| 6682 | htab = elf64_aarch64_hash_table (info); |
| 6683 | dynobj = htab->root.dynobj; |
| 6684 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 6685 | |
| 6686 | if (htab->root.dynamic_sections_created) |
| 6687 | { |
| 6688 | Elf64_External_Dyn *dyncon, *dynconend; |
| 6689 | |
| 6690 | if (sdyn == NULL || htab->root.sgot == NULL) |
| 6691 | abort (); |
| 6692 | |
| 6693 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 6694 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
| 6695 | for (; dyncon < dynconend; dyncon++) |
| 6696 | { |
| 6697 | Elf_Internal_Dyn dyn; |
| 6698 | asection *s; |
| 6699 | |
| 6700 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 6701 | |
| 6702 | switch (dyn.d_tag) |
| 6703 | { |
| 6704 | default: |
| 6705 | continue; |
| 6706 | |
| 6707 | case DT_PLTGOT: |
| 6708 | s = htab->root.sgotplt; |
| 6709 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 6710 | break; |
| 6711 | |
| 6712 | case DT_JMPREL: |
| 6713 | dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma; |
| 6714 | break; |
| 6715 | |
| 6716 | case DT_PLTRELSZ: |
| 6717 | s = htab->root.srelplt->output_section; |
| 6718 | dyn.d_un.d_val = s->size; |
| 6719 | break; |
| 6720 | |
| 6721 | case DT_RELASZ: |
| 6722 | /* The procedure linkage table relocs (DT_JMPREL) should |
| 6723 | not be included in the overall relocs (DT_RELA). |
| 6724 | Therefore, we override the DT_RELASZ entry here to |
| 6725 | make it not include the JMPREL relocs. Since the |
| 6726 | linker script arranges for .rela.plt to follow all |
| 6727 | other relocation sections, we don't have to worry |
| 6728 | about changing the DT_RELA entry. */ |
| 6729 | if (htab->root.srelplt != NULL) |
| 6730 | { |
| 6731 | s = htab->root.srelplt->output_section; |
| 6732 | dyn.d_un.d_val -= s->size; |
| 6733 | } |
| 6734 | break; |
| 6735 | |
| 6736 | case DT_TLSDESC_PLT: |
| 6737 | s = htab->root.splt; |
| 6738 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| 6739 | + htab->tlsdesc_plt; |
| 6740 | break; |
| 6741 | |
| 6742 | case DT_TLSDESC_GOT: |
| 6743 | s = htab->root.sgot; |
| 6744 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| 6745 | + htab->dt_tlsdesc_got; |
| 6746 | break; |
| 6747 | } |
| 6748 | |
| 6749 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6750 | } |
| 6751 | |
| 6752 | } |
| 6753 | |
| 6754 | /* Fill in the special first entry in the procedure linkage table. */ |
| 6755 | if (htab->root.splt && htab->root.splt->size > 0) |
| 6756 | { |
| 6757 | elf64_aarch64_init_small_plt0_entry (output_bfd, htab); |
| 6758 | |
| 6759 | elf_section_data (htab->root.splt->output_section)-> |
| 6760 | this_hdr.sh_entsize = htab->plt_entry_size; |
| 6761 | |
| 6762 | |
| 6763 | if (htab->tlsdesc_plt) |
| 6764 | { |
| 6765 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 6766 | htab->root.sgot->contents + htab->dt_tlsdesc_got); |
| 6767 | |
| 6768 | memcpy (htab->root.splt->contents + htab->tlsdesc_plt, |
| 6769 | elf64_aarch64_tlsdesc_small_plt_entry, |
| 6770 | sizeof (elf64_aarch64_tlsdesc_small_plt_entry)); |
| 6771 | |
| 6772 | { |
| 6773 | bfd_vma adrp1_addr = |
| 6774 | htab->root.splt->output_section->vma |
| 6775 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 4; |
| 6776 | |
| 6777 | bfd_vma adrp2_addr = |
| 6778 | htab->root.splt->output_section->vma |
| 6779 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 8; |
| 6780 | |
| 6781 | bfd_vma got_addr = |
| 6782 | htab->root.sgot->output_section->vma |
| 6783 | + htab->root.sgot->output_offset; |
| 6784 | |
| 6785 | bfd_vma pltgot_addr = |
| 6786 | htab->root.sgotplt->output_section->vma |
| 6787 | + htab->root.sgotplt->output_offset; |
| 6788 | |
| 6789 | bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got; |
| 6790 | bfd_vma opcode; |
| 6791 | |
| 6792 | /* adrp x2, DT_TLSDESC_GOT */ |
| 6793 | opcode = bfd_get_32 (output_bfd, |
| 6794 | htab->root.splt->contents |
| 6795 | + htab->tlsdesc_plt + 4); |
| 6796 | opcode = reencode_adr_imm |
| 6797 | (opcode, (PG (dt_tlsdesc_got) - PG (adrp1_addr)) >> 12); |
| 6798 | bfd_put_32 (output_bfd, opcode, |
| 6799 | htab->root.splt->contents + htab->tlsdesc_plt + 4); |
| 6800 | |
| 6801 | /* adrp x3, 0 */ |
| 6802 | opcode = bfd_get_32 (output_bfd, |
| 6803 | htab->root.splt->contents |
| 6804 | + htab->tlsdesc_plt + 8); |
| 6805 | opcode = reencode_adr_imm |
| 6806 | (opcode, (PG (pltgot_addr) - PG (adrp2_addr)) >> 12); |
| 6807 | bfd_put_32 (output_bfd, opcode, |
| 6808 | htab->root.splt->contents + htab->tlsdesc_plt + 8); |
| 6809 | |
| 6810 | /* ldr x2, [x2, #0] */ |
| 6811 | opcode = bfd_get_32 (output_bfd, |
| 6812 | htab->root.splt->contents |
| 6813 | + htab->tlsdesc_plt + 12); |
| 6814 | opcode = reencode_ldst_pos_imm (opcode, |
| 6815 | PG_OFFSET (dt_tlsdesc_got) >> 3); |
| 6816 | bfd_put_32 (output_bfd, opcode, |
| 6817 | htab->root.splt->contents + htab->tlsdesc_plt + 12); |
| 6818 | |
| 6819 | /* add x3, x3, 0 */ |
| 6820 | opcode = bfd_get_32 (output_bfd, |
| 6821 | htab->root.splt->contents |
| 6822 | + htab->tlsdesc_plt + 16); |
| 6823 | opcode = reencode_add_imm (opcode, PG_OFFSET (pltgot_addr)); |
| 6824 | bfd_put_32 (output_bfd, opcode, |
| 6825 | htab->root.splt->contents + htab->tlsdesc_plt + 16); |
| 6826 | } |
| 6827 | } |
| 6828 | } |
| 6829 | |
| 6830 | if (htab->root.sgotplt) |
| 6831 | { |
| 6832 | if (bfd_is_abs_section (htab->root.sgotplt->output_section)) |
| 6833 | { |
| 6834 | (*_bfd_error_handler) |
| 6835 | (_("discarded output section: `%A'"), htab->root.sgotplt); |
| 6836 | return FALSE; |
| 6837 | } |
| 6838 | |
| 6839 | /* Fill in the first three entries in the global offset table. */ |
| 6840 | if (htab->root.sgotplt->size > 0) |
| 6841 | { |
| 6842 | /* Set the first entry in the global offset table to the address of |
| 6843 | the dynamic section. */ |
| 6844 | if (sdyn == NULL) |
| 6845 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 6846 | htab->root.sgotplt->contents); |
| 6847 | else |
| 6848 | bfd_put_64 (output_bfd, |
| 6849 | sdyn->output_section->vma + sdyn->output_offset, |
| 6850 | htab->root.sgotplt->contents); |
| 6851 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
| 6852 | bfd_put_64 (output_bfd, |
| 6853 | (bfd_vma) 0, |
| 6854 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE); |
| 6855 | bfd_put_64 (output_bfd, |
| 6856 | (bfd_vma) 0, |
| 6857 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2); |
| 6858 | } |
| 6859 | |
| 6860 | elf_section_data (htab->root.sgotplt->output_section)-> |
| 6861 | this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| 6862 | } |
| 6863 | |
| 6864 | if (htab->root.sgot && htab->root.sgot->size > 0) |
| 6865 | elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize |
| 6866 | = GOT_ENTRY_SIZE; |
| 6867 | |
| 6868 | return TRUE; |
| 6869 | } |
| 6870 | |
| 6871 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 6872 | or (bfd_vma) -1 if it should not be included. */ |
| 6873 | |
| 6874 | static bfd_vma |
| 6875 | elf64_aarch64_plt_sym_val (bfd_vma i, const asection *plt, |
| 6876 | const arelent *rel ATTRIBUTE_UNUSED) |
| 6877 | { |
| 6878 | return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE; |
| 6879 | } |
| 6880 | |
| 6881 | |
| 6882 | /* We use this so we can override certain functions |
| 6883 | (though currently we don't). */ |
| 6884 | |
| 6885 | const struct elf_size_info elf64_aarch64_size_info = |
| 6886 | { |
| 6887 | sizeof (Elf64_External_Ehdr), |
| 6888 | sizeof (Elf64_External_Phdr), |
| 6889 | sizeof (Elf64_External_Shdr), |
| 6890 | sizeof (Elf64_External_Rel), |
| 6891 | sizeof (Elf64_External_Rela), |
| 6892 | sizeof (Elf64_External_Sym), |
| 6893 | sizeof (Elf64_External_Dyn), |
| 6894 | sizeof (Elf_External_Note), |
| 6895 | 4, /* Hash table entry size. */ |
| 6896 | 1, /* Internal relocs per external relocs. */ |
| 6897 | 64, /* Arch size. */ |
| 6898 | 3, /* Log_file_align. */ |
| 6899 | ELFCLASS64, EV_CURRENT, |
| 6900 | bfd_elf64_write_out_phdrs, |
| 6901 | bfd_elf64_write_shdrs_and_ehdr, |
| 6902 | bfd_elf64_checksum_contents, |
| 6903 | bfd_elf64_write_relocs, |
| 6904 | bfd_elf64_swap_symbol_in, |
| 6905 | bfd_elf64_swap_symbol_out, |
| 6906 | bfd_elf64_slurp_reloc_table, |
| 6907 | bfd_elf64_slurp_symbol_table, |
| 6908 | bfd_elf64_swap_dyn_in, |
| 6909 | bfd_elf64_swap_dyn_out, |
| 6910 | bfd_elf64_swap_reloc_in, |
| 6911 | bfd_elf64_swap_reloc_out, |
| 6912 | bfd_elf64_swap_reloca_in, |
| 6913 | bfd_elf64_swap_reloca_out |
| 6914 | }; |
| 6915 | |
| 6916 | #define ELF_ARCH bfd_arch_aarch64 |
| 6917 | #define ELF_MACHINE_CODE EM_AARCH64 |
| 6918 | #define ELF_MAXPAGESIZE 0x10000 |
| 6919 | #define ELF_MINPAGESIZE 0x1000 |
| 6920 | #define ELF_COMMONPAGESIZE 0x1000 |
| 6921 | |
| 6922 | #define bfd_elf64_close_and_cleanup \ |
| 6923 | elf64_aarch64_close_and_cleanup |
| 6924 | |
| 6925 | #define bfd_elf64_bfd_copy_private_bfd_data \ |
| 6926 | elf64_aarch64_copy_private_bfd_data |
| 6927 | |
| 6928 | #define bfd_elf64_bfd_free_cached_info \ |
| 6929 | elf64_aarch64_bfd_free_cached_info |
| 6930 | |
| 6931 | #define bfd_elf64_bfd_is_target_special_symbol \ |
| 6932 | elf64_aarch64_is_target_special_symbol |
| 6933 | |
| 6934 | #define bfd_elf64_bfd_link_hash_table_create \ |
| 6935 | elf64_aarch64_link_hash_table_create |
| 6936 | |
| 6937 | #define bfd_elf64_bfd_link_hash_table_free \ |
| 6938 | elf64_aarch64_hash_table_free |
| 6939 | |
| 6940 | #define bfd_elf64_bfd_merge_private_bfd_data \ |
| 6941 | elf64_aarch64_merge_private_bfd_data |
| 6942 | |
| 6943 | #define bfd_elf64_bfd_print_private_bfd_data \ |
| 6944 | elf64_aarch64_print_private_bfd_data |
| 6945 | |
| 6946 | #define bfd_elf64_bfd_reloc_type_lookup \ |
| 6947 | elf64_aarch64_reloc_type_lookup |
| 6948 | |
| 6949 | #define bfd_elf64_bfd_reloc_name_lookup \ |
| 6950 | elf64_aarch64_reloc_name_lookup |
| 6951 | |
| 6952 | #define bfd_elf64_bfd_set_private_flags \ |
| 6953 | elf64_aarch64_set_private_flags |
| 6954 | |
| 6955 | #define bfd_elf64_find_inliner_info \ |
| 6956 | elf64_aarch64_find_inliner_info |
| 6957 | |
| 6958 | #define bfd_elf64_find_nearest_line \ |
| 6959 | elf64_aarch64_find_nearest_line |
| 6960 | |
| 6961 | #define bfd_elf64_mkobject \ |
| 6962 | elf64_aarch64_mkobject |
| 6963 | |
| 6964 | #define bfd_elf64_new_section_hook \ |
| 6965 | elf64_aarch64_new_section_hook |
| 6966 | |
| 6967 | #define elf_backend_adjust_dynamic_symbol \ |
| 6968 | elf64_aarch64_adjust_dynamic_symbol |
| 6969 | |
| 6970 | #define elf_backend_always_size_sections \ |
| 6971 | elf64_aarch64_always_size_sections |
| 6972 | |
| 6973 | #define elf_backend_check_relocs \ |
| 6974 | elf64_aarch64_check_relocs |
| 6975 | |
| 6976 | #define elf_backend_copy_indirect_symbol \ |
| 6977 | elf64_aarch64_copy_indirect_symbol |
| 6978 | |
| 6979 | /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts |
| 6980 | to them in our hash. */ |
| 6981 | #define elf_backend_create_dynamic_sections \ |
| 6982 | elf64_aarch64_create_dynamic_sections |
| 6983 | |
| 6984 | #define elf_backend_init_index_section \ |
| 6985 | _bfd_elf_init_2_index_sections |
| 6986 | |
| 6987 | #define elf_backend_is_function_type \ |
| 6988 | elf64_aarch64_is_function_type |
| 6989 | |
| 6990 | #define elf_backend_finish_dynamic_sections \ |
| 6991 | elf64_aarch64_finish_dynamic_sections |
| 6992 | |
| 6993 | #define elf_backend_finish_dynamic_symbol \ |
| 6994 | elf64_aarch64_finish_dynamic_symbol |
| 6995 | |
| 6996 | #define elf_backend_gc_sweep_hook \ |
| 6997 | elf64_aarch64_gc_sweep_hook |
| 6998 | |
| 6999 | #define elf_backend_object_p \ |
| 7000 | elf64_aarch64_object_p |
| 7001 | |
| 7002 | #define elf_backend_output_arch_local_syms \ |
| 7003 | elf64_aarch64_output_arch_local_syms |
| 7004 | |
| 7005 | #define elf_backend_plt_sym_val \ |
| 7006 | elf64_aarch64_plt_sym_val |
| 7007 | |
| 7008 | #define elf_backend_post_process_headers \ |
| 7009 | elf64_aarch64_post_process_headers |
| 7010 | |
| 7011 | #define elf_backend_relocate_section \ |
| 7012 | elf64_aarch64_relocate_section |
| 7013 | |
| 7014 | #define elf_backend_reloc_type_class \ |
| 7015 | elf64_aarch64_reloc_type_class |
| 7016 | |
| 7017 | #define elf_backend_section_flags \ |
| 7018 | elf64_aarch64_section_flags |
| 7019 | |
| 7020 | #define elf_backend_section_from_shdr \ |
| 7021 | elf64_aarch64_section_from_shdr |
| 7022 | |
| 7023 | #define elf_backend_size_dynamic_sections \ |
| 7024 | elf64_aarch64_size_dynamic_sections |
| 7025 | |
| 7026 | #define elf_backend_size_info \ |
| 7027 | elf64_aarch64_size_info |
| 7028 | |
| 7029 | #define elf_backend_can_refcount 1 |
| 7030 | #define elf_backend_can_gc_sections 0 |
| 7031 | #define elf_backend_plt_readonly 1 |
| 7032 | #define elf_backend_want_got_plt 1 |
| 7033 | #define elf_backend_want_plt_sym 0 |
| 7034 | #define elf_backend_may_use_rel_p 0 |
| 7035 | #define elf_backend_may_use_rela_p 1 |
| 7036 | #define elf_backend_default_use_rela_p 1 |
| 7037 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3) |
| 7038 | |
| 7039 | #undef elf_backend_obj_attrs_section |
| 7040 | #define elf_backend_obj_attrs_section ".ARM.attributes" |
| 7041 | |
| 7042 | #include "elf64-target.h" |