| 1 | /* AArch64-specific support for ELF. |
| 2 | Copyright (C) 2009-2017 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 | #include "sysdep.h" |
| 22 | #include "elfxx-aarch64.h" |
| 23 | #include <stdarg.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | #define MASK(n) ((1u << (n)) - 1) |
| 27 | |
| 28 | /* Sign-extend VALUE, which has the indicated number of BITS. */ |
| 29 | |
| 30 | bfd_signed_vma |
| 31 | _bfd_aarch64_sign_extend (bfd_vma value, int bits) |
| 32 | { |
| 33 | if (value & ((bfd_vma) 1 << (bits - 1))) |
| 34 | /* VALUE is negative. */ |
| 35 | value |= ((bfd_vma) - 1) << bits; |
| 36 | |
| 37 | return value; |
| 38 | } |
| 39 | |
| 40 | /* Decode the IMM field of ADRP. */ |
| 41 | |
| 42 | uint32_t |
| 43 | _bfd_aarch64_decode_adrp_imm (uint32_t insn) |
| 44 | { |
| 45 | return (((insn >> 5) & MASK (19)) << 2) | ((insn >> 29) & MASK (2)); |
| 46 | } |
| 47 | |
| 48 | /* Reencode the imm field of add immediate. */ |
| 49 | static inline uint32_t |
| 50 | reencode_add_imm (uint32_t insn, uint32_t imm) |
| 51 | { |
| 52 | return (insn & ~(MASK (12) << 10)) | ((imm & MASK (12)) << 10); |
| 53 | } |
| 54 | |
| 55 | /* Reencode the IMM field of ADR. */ |
| 56 | |
| 57 | uint32_t |
| 58 | _bfd_aarch64_reencode_adr_imm (uint32_t insn, uint32_t imm) |
| 59 | { |
| 60 | return (insn & ~((MASK (2) << 29) | (MASK (19) << 5))) |
| 61 | | ((imm & MASK (2)) << 29) | ((imm & (MASK (19) << 2)) << 3); |
| 62 | } |
| 63 | |
| 64 | /* Reencode the imm field of ld/st pos immediate. */ |
| 65 | static inline uint32_t |
| 66 | reencode_ldst_pos_imm (uint32_t insn, uint32_t imm) |
| 67 | { |
| 68 | return (insn & ~(MASK (12) << 10)) | ((imm & MASK (12)) << 10); |
| 69 | } |
| 70 | |
| 71 | /* Encode the 26-bit offset of unconditional branch. */ |
| 72 | static inline uint32_t |
| 73 | reencode_branch_ofs_26 (uint32_t insn, uint32_t ofs) |
| 74 | { |
| 75 | return (insn & ~MASK (26)) | (ofs & MASK (26)); |
| 76 | } |
| 77 | |
| 78 | /* Encode the 19-bit offset of conditional branch and compare & branch. */ |
| 79 | static inline uint32_t |
| 80 | reencode_cond_branch_ofs_19 (uint32_t insn, uint32_t ofs) |
| 81 | { |
| 82 | return (insn & ~(MASK (19) << 5)) | ((ofs & MASK (19)) << 5); |
| 83 | } |
| 84 | |
| 85 | /* Decode the 19-bit offset of load literal. */ |
| 86 | static inline uint32_t |
| 87 | reencode_ld_lit_ofs_19 (uint32_t insn, uint32_t ofs) |
| 88 | { |
| 89 | return (insn & ~(MASK (19) << 5)) | ((ofs & MASK (19)) << 5); |
| 90 | } |
| 91 | |
| 92 | /* Encode the 14-bit offset of test & branch. */ |
| 93 | static inline uint32_t |
| 94 | reencode_tst_branch_ofs_14 (uint32_t insn, uint32_t ofs) |
| 95 | { |
| 96 | return (insn & ~(MASK (14) << 5)) | ((ofs & MASK (14)) << 5); |
| 97 | } |
| 98 | |
| 99 | /* Reencode the imm field of move wide. */ |
| 100 | static inline uint32_t |
| 101 | reencode_movw_imm (uint32_t insn, uint32_t imm) |
| 102 | { |
| 103 | return (insn & ~(MASK (16) << 5)) | ((imm & MASK (16)) << 5); |
| 104 | } |
| 105 | |
| 106 | /* Reencode mov[zn] to movz. */ |
| 107 | static inline uint32_t |
| 108 | reencode_movzn_to_movz (uint32_t opcode) |
| 109 | { |
| 110 | return opcode | (1 << 30); |
| 111 | } |
| 112 | |
| 113 | /* Reencode mov[zn] to movn. */ |
| 114 | static inline uint32_t |
| 115 | reencode_movzn_to_movn (uint32_t opcode) |
| 116 | { |
| 117 | return opcode & ~(1 << 30); |
| 118 | } |
| 119 | |
| 120 | /* Return non-zero if the indicated VALUE has overflowed the maximum |
| 121 | range expressible by a unsigned number with the indicated number of |
| 122 | BITS. */ |
| 123 | |
| 124 | static bfd_reloc_status_type |
| 125 | aarch64_unsigned_overflow (bfd_vma value, unsigned int bits) |
| 126 | { |
| 127 | bfd_vma lim; |
| 128 | if (bits >= sizeof (bfd_vma) * 8) |
| 129 | return bfd_reloc_ok; |
| 130 | lim = (bfd_vma) 1 << bits; |
| 131 | if (value >= lim) |
| 132 | return bfd_reloc_overflow; |
| 133 | return bfd_reloc_ok; |
| 134 | } |
| 135 | |
| 136 | /* Return non-zero if the indicated VALUE has overflowed the maximum |
| 137 | range expressible by an signed number with the indicated number of |
| 138 | BITS. */ |
| 139 | |
| 140 | static bfd_reloc_status_type |
| 141 | aarch64_signed_overflow (bfd_vma value, unsigned int bits) |
| 142 | { |
| 143 | bfd_signed_vma svalue = (bfd_signed_vma) value; |
| 144 | bfd_signed_vma lim; |
| 145 | |
| 146 | if (bits >= sizeof (bfd_vma) * 8) |
| 147 | return bfd_reloc_ok; |
| 148 | lim = (bfd_signed_vma) 1 << (bits - 1); |
| 149 | if (svalue < -lim || svalue >= lim) |
| 150 | return bfd_reloc_overflow; |
| 151 | return bfd_reloc_ok; |
| 152 | } |
| 153 | |
| 154 | /* Insert the addend/value into the instruction or data object being |
| 155 | relocated. */ |
| 156 | bfd_reloc_status_type |
| 157 | _bfd_aarch64_elf_put_addend (bfd *abfd, |
| 158 | bfd_byte *address, bfd_reloc_code_real_type r_type, |
| 159 | reloc_howto_type *howto, bfd_signed_vma addend) |
| 160 | { |
| 161 | bfd_reloc_status_type status = bfd_reloc_ok; |
| 162 | bfd_signed_vma old_addend = addend; |
| 163 | bfd_vma contents; |
| 164 | int size; |
| 165 | |
| 166 | size = bfd_get_reloc_size (howto); |
| 167 | switch (size) |
| 168 | { |
| 169 | case 0: |
| 170 | return status; |
| 171 | case 2: |
| 172 | contents = bfd_get_16 (abfd, address); |
| 173 | break; |
| 174 | case 4: |
| 175 | if (howto->src_mask != 0xffffffff) |
| 176 | /* Must be 32-bit instruction, always little-endian. */ |
| 177 | contents = bfd_getl32 (address); |
| 178 | else |
| 179 | /* Must be 32-bit data (endianness dependent). */ |
| 180 | contents = bfd_get_32 (abfd, address); |
| 181 | break; |
| 182 | case 8: |
| 183 | contents = bfd_get_64 (abfd, address); |
| 184 | break; |
| 185 | default: |
| 186 | abort (); |
| 187 | } |
| 188 | |
| 189 | switch (howto->complain_on_overflow) |
| 190 | { |
| 191 | case complain_overflow_dont: |
| 192 | break; |
| 193 | case complain_overflow_signed: |
| 194 | status = aarch64_signed_overflow (addend, |
| 195 | howto->bitsize + howto->rightshift); |
| 196 | break; |
| 197 | case complain_overflow_unsigned: |
| 198 | status = aarch64_unsigned_overflow (addend, |
| 199 | howto->bitsize + howto->rightshift); |
| 200 | break; |
| 201 | case complain_overflow_bitfield: |
| 202 | default: |
| 203 | abort (); |
| 204 | } |
| 205 | |
| 206 | addend >>= howto->rightshift; |
| 207 | |
| 208 | switch (r_type) |
| 209 | { |
| 210 | case BFD_RELOC_AARCH64_CALL26: |
| 211 | case BFD_RELOC_AARCH64_JUMP26: |
| 212 | contents = reencode_branch_ofs_26 (contents, addend); |
| 213 | break; |
| 214 | |
| 215 | case BFD_RELOC_AARCH64_BRANCH19: |
| 216 | contents = reencode_cond_branch_ofs_19 (contents, addend); |
| 217 | break; |
| 218 | |
| 219 | case BFD_RELOC_AARCH64_TSTBR14: |
| 220 | contents = reencode_tst_branch_ofs_14 (contents, addend); |
| 221 | break; |
| 222 | |
| 223 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 224 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: |
| 225 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 226 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 227 | if (old_addend & ((1 << howto->rightshift) - 1)) |
| 228 | return bfd_reloc_overflow; |
| 229 | contents = reencode_ld_lit_ofs_19 (contents, addend); |
| 230 | break; |
| 231 | |
| 232 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 233 | break; |
| 234 | |
| 235 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 236 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 237 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 238 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 239 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 240 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 241 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 242 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 243 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 244 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 245 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 246 | contents = _bfd_aarch64_reencode_adr_imm (contents, addend); |
| 247 | break; |
| 248 | |
| 249 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 250 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 251 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 252 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12: |
| 253 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12: |
| 254 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: |
| 255 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 256 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 257 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 258 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 259 | /* Corresponds to: add rd, rn, #uimm12 to provide the low order |
| 260 | 12 bits of the page offset following |
| 261 | BFD_RELOC_AARCH64_ADR_HI21_PCREL which computes the |
| 262 | (pc-relative) page base. */ |
| 263 | contents = reencode_add_imm (contents, addend); |
| 264 | break; |
| 265 | |
| 266 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 267 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 268 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 269 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 270 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 271 | case BFD_RELOC_AARCH64_LDST128_LO12: |
| 272 | case BFD_RELOC_AARCH64_LDST16_LO12: |
| 273 | case BFD_RELOC_AARCH64_LDST32_LO12: |
| 274 | case BFD_RELOC_AARCH64_LDST64_LO12: |
| 275 | case BFD_RELOC_AARCH64_LDST8_LO12: |
| 276 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 277 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: |
| 278 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 279 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 280 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12: |
| 281 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC: |
| 282 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12: |
| 283 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC: |
| 284 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12: |
| 285 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC: |
| 286 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12: |
| 287 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC: |
| 288 | if (old_addend & ((1 << howto->rightshift) - 1)) |
| 289 | return bfd_reloc_overflow; |
| 290 | /* Used for ldr*|str* rt, [rn, #uimm12] to provide the low order |
| 291 | 12 bits of the page offset following BFD_RELOC_AARCH64_ADR_HI21_PCREL |
| 292 | which computes the (pc-relative) page base. */ |
| 293 | contents = reencode_ldst_pos_imm (contents, addend); |
| 294 | break; |
| 295 | |
| 296 | /* Group relocations to create high bits of a 16, 32, 48 or 64 |
| 297 | bit signed data or abs address inline. Will change |
| 298 | instruction to MOVN or MOVZ depending on sign of calculated |
| 299 | value. */ |
| 300 | |
| 301 | case BFD_RELOC_AARCH64_MOVW_G0_S: |
| 302 | case BFD_RELOC_AARCH64_MOVW_G1_S: |
| 303 | case BFD_RELOC_AARCH64_MOVW_G2_S: |
| 304 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0: |
| 305 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1: |
| 306 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2: |
| 307 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 308 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 309 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 310 | /* NOTE: We can only come here with movz or movn. */ |
| 311 | if (addend < 0) |
| 312 | { |
| 313 | /* Force use of MOVN. */ |
| 314 | addend = ~addend; |
| 315 | contents = reencode_movzn_to_movn (contents); |
| 316 | } |
| 317 | else |
| 318 | { |
| 319 | /* Force use of MOVZ. */ |
| 320 | contents = reencode_movzn_to_movz (contents); |
| 321 | } |
| 322 | /* Fall through. */ |
| 323 | |
| 324 | /* Group relocations to create a 16, 32, 48 or 64 bit unsigned |
| 325 | data or abs address inline. */ |
| 326 | |
| 327 | case BFD_RELOC_AARCH64_MOVW_G0: |
| 328 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 329 | case BFD_RELOC_AARCH64_MOVW_G1: |
| 330 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 331 | case BFD_RELOC_AARCH64_MOVW_G2: |
| 332 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 333 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 334 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 335 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 336 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 337 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 338 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 339 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 340 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: |
| 341 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
| 342 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: |
| 343 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC: |
| 344 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 345 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 346 | contents = reencode_movw_imm (contents, addend); |
| 347 | break; |
| 348 | |
| 349 | default: |
| 350 | /* Repack simple data */ |
| 351 | if (howto->dst_mask & (howto->dst_mask + 1)) |
| 352 | return bfd_reloc_notsupported; |
| 353 | |
| 354 | contents = ((contents & ~howto->dst_mask) | (addend & howto->dst_mask)); |
| 355 | break; |
| 356 | } |
| 357 | |
| 358 | switch (size) |
| 359 | { |
| 360 | case 2: |
| 361 | bfd_put_16 (abfd, contents, address); |
| 362 | break; |
| 363 | case 4: |
| 364 | if (howto->dst_mask != 0xffffffff) |
| 365 | /* must be 32-bit instruction, always little-endian */ |
| 366 | bfd_putl32 (contents, address); |
| 367 | else |
| 368 | /* must be 32-bit data (endianness dependent) */ |
| 369 | bfd_put_32 (abfd, contents, address); |
| 370 | break; |
| 371 | case 8: |
| 372 | bfd_put_64 (abfd, contents, address); |
| 373 | break; |
| 374 | default: |
| 375 | abort (); |
| 376 | } |
| 377 | |
| 378 | return status; |
| 379 | } |
| 380 | |
| 381 | bfd_vma |
| 382 | _bfd_aarch64_elf_resolve_relocation (bfd_reloc_code_real_type r_type, |
| 383 | bfd_vma place, bfd_vma value, |
| 384 | bfd_vma addend, bfd_boolean weak_undef_p) |
| 385 | { |
| 386 | switch (r_type) |
| 387 | { |
| 388 | case BFD_RELOC_AARCH64_NONE: |
| 389 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 390 | break; |
| 391 | |
| 392 | case BFD_RELOC_AARCH64_16_PCREL: |
| 393 | case BFD_RELOC_AARCH64_32_PCREL: |
| 394 | case BFD_RELOC_AARCH64_64_PCREL: |
| 395 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 396 | case BFD_RELOC_AARCH64_BRANCH19: |
| 397 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: |
| 398 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 399 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 400 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 401 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 402 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 403 | case BFD_RELOC_AARCH64_TSTBR14: |
| 404 | if (weak_undef_p) |
| 405 | value = place; |
| 406 | value = value + addend - place; |
| 407 | break; |
| 408 | |
| 409 | case BFD_RELOC_AARCH64_CALL26: |
| 410 | case BFD_RELOC_AARCH64_JUMP26: |
| 411 | value = value + addend - place; |
| 412 | break; |
| 413 | |
| 414 | case BFD_RELOC_AARCH64_16: |
| 415 | case BFD_RELOC_AARCH64_32: |
| 416 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 417 | case BFD_RELOC_AARCH64_MOVW_G0: |
| 418 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 419 | case BFD_RELOC_AARCH64_MOVW_G0_S: |
| 420 | case BFD_RELOC_AARCH64_MOVW_G1: |
| 421 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 422 | case BFD_RELOC_AARCH64_MOVW_G1_S: |
| 423 | case BFD_RELOC_AARCH64_MOVW_G2: |
| 424 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 425 | case BFD_RELOC_AARCH64_MOVW_G2_S: |
| 426 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 427 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 428 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 429 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 430 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 431 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 432 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 433 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12: |
| 434 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12: |
| 435 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: |
| 436 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12: |
| 437 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC: |
| 438 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12: |
| 439 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC: |
| 440 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12: |
| 441 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC: |
| 442 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12: |
| 443 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC: |
| 444 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0: |
| 445 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: |
| 446 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1: |
| 447 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC: |
| 448 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2: |
| 449 | value = value + addend; |
| 450 | break; |
| 451 | |
| 452 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 453 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 454 | if (weak_undef_p) |
| 455 | value = PG (place); |
| 456 | value = PG (value + addend) - PG (place); |
| 457 | break; |
| 458 | |
| 459 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 460 | value = value + addend - place; |
| 461 | break; |
| 462 | |
| 463 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 464 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 465 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 466 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 467 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 468 | value = PG (value + addend) - PG (place); |
| 469 | break; |
| 470 | |
| 471 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 472 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 473 | /* Caller must make sure addend is the base address of .got section. */ |
| 474 | value = value - PG (addend); |
| 475 | break; |
| 476 | |
| 477 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 478 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 479 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 480 | case BFD_RELOC_AARCH64_LDST128_LO12: |
| 481 | case BFD_RELOC_AARCH64_LDST16_LO12: |
| 482 | case BFD_RELOC_AARCH64_LDST32_LO12: |
| 483 | case BFD_RELOC_AARCH64_LDST64_LO12: |
| 484 | case BFD_RELOC_AARCH64_LDST8_LO12: |
| 485 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| 486 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 487 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 488 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: |
| 489 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| 490 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 491 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 492 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 493 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 494 | value = PG_OFFSET (value + addend); |
| 495 | break; |
| 496 | |
| 497 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 498 | value = value + addend; |
| 499 | break; |
| 500 | |
| 501 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
| 502 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 503 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 504 | value = (value + addend) & (bfd_vma) 0xffff0000; |
| 505 | break; |
| 506 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 507 | /* Mask off low 12bits, keep all other high bits, so that the later |
| 508 | generic code could check whehter there is overflow. */ |
| 509 | value = (value + addend) & ~(bfd_vma) 0xfff; |
| 510 | break; |
| 511 | |
| 512 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: |
| 513 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 514 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 515 | value = (value + addend) & (bfd_vma) 0xffff; |
| 516 | break; |
| 517 | |
| 518 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 519 | value = (value + addend) & ~(bfd_vma) 0xffffffff; |
| 520 | value -= place & ~(bfd_vma) 0xffffffff; |
| 521 | break; |
| 522 | |
| 523 | default: |
| 524 | break; |
| 525 | } |
| 526 | |
| 527 | return value; |
| 528 | } |
| 529 | |
| 530 | /* Hook called by the linker routine which adds symbols from an object |
| 531 | file. */ |
| 532 | |
| 533 | bfd_boolean |
| 534 | _bfd_aarch64_elf_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
| 535 | Elf_Internal_Sym *sym, |
| 536 | const char **namep ATTRIBUTE_UNUSED, |
| 537 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 538 | asection **secp ATTRIBUTE_UNUSED, |
| 539 | bfd_vma *valp ATTRIBUTE_UNUSED) |
| 540 | { |
| 541 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
| 542 | && (abfd->flags & DYNAMIC) == 0 |
| 543 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) |
| 544 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
| 545 | |
| 546 | return TRUE; |
| 547 | } |
| 548 | |
| 549 | /* Support for core dump NOTE sections. */ |
| 550 | |
| 551 | bfd_boolean |
| 552 | _bfd_aarch64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 553 | { |
| 554 | int offset; |
| 555 | size_t size; |
| 556 | |
| 557 | switch (note->descsz) |
| 558 | { |
| 559 | default: |
| 560 | return FALSE; |
| 561 | |
| 562 | case 392: /* sizeof(struct elf_prstatus) on Linux/arm64. */ |
| 563 | /* pr_cursig */ |
| 564 | elf_tdata (abfd)->core->signal |
| 565 | = bfd_get_16 (abfd, note->descdata + 12); |
| 566 | |
| 567 | /* pr_pid */ |
| 568 | elf_tdata (abfd)->core->lwpid |
| 569 | = bfd_get_32 (abfd, note->descdata + 32); |
| 570 | |
| 571 | /* pr_reg */ |
| 572 | offset = 112; |
| 573 | size = 272; |
| 574 | |
| 575 | break; |
| 576 | } |
| 577 | |
| 578 | /* Make a ".reg/999" section. */ |
| 579 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 580 | size, note->descpos + offset); |
| 581 | } |
| 582 | |
| 583 | bfd_boolean |
| 584 | _bfd_aarch64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 585 | { |
| 586 | switch (note->descsz) |
| 587 | { |
| 588 | default: |
| 589 | return FALSE; |
| 590 | |
| 591 | case 136: /* This is sizeof(struct elf_prpsinfo) on Linux/aarch64. */ |
| 592 | elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); |
| 593 | elf_tdata (abfd)->core->program |
| 594 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
| 595 | elf_tdata (abfd)->core->command |
| 596 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
| 597 | } |
| 598 | |
| 599 | /* Note that for some reason, a spurious space is tacked |
| 600 | onto the end of the args in some (at least one anyway) |
| 601 | implementations, so strip it off if it exists. */ |
| 602 | |
| 603 | { |
| 604 | char *command = elf_tdata (abfd)->core->command; |
| 605 | int n = strlen (command); |
| 606 | |
| 607 | if (0 < n && command[n - 1] == ' ') |
| 608 | command[n - 1] = '\0'; |
| 609 | } |
| 610 | |
| 611 | return TRUE; |
| 612 | } |
| 613 | |
| 614 | char * |
| 615 | _bfd_aarch64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, |
| 616 | ...) |
| 617 | { |
| 618 | switch (note_type) |
| 619 | { |
| 620 | default: |
| 621 | return NULL; |
| 622 | |
| 623 | case NT_PRPSINFO: |
| 624 | { |
| 625 | char data[136]; |
| 626 | va_list ap; |
| 627 | |
| 628 | va_start (ap, note_type); |
| 629 | memset (data, 0, sizeof (data)); |
| 630 | strncpy (data + 40, va_arg (ap, const char *), 16); |
| 631 | strncpy (data + 56, va_arg (ap, const char *), 80); |
| 632 | va_end (ap); |
| 633 | |
| 634 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", |
| 635 | note_type, data, sizeof (data)); |
| 636 | } |
| 637 | |
| 638 | case NT_PRSTATUS: |
| 639 | { |
| 640 | char data[392]; |
| 641 | va_list ap; |
| 642 | long pid; |
| 643 | int cursig; |
| 644 | const void *greg; |
| 645 | |
| 646 | va_start (ap, note_type); |
| 647 | memset (data, 0, sizeof (data)); |
| 648 | pid = va_arg (ap, long); |
| 649 | bfd_put_32 (abfd, pid, data + 32); |
| 650 | cursig = va_arg (ap, int); |
| 651 | bfd_put_16 (abfd, cursig, data + 12); |
| 652 | greg = va_arg (ap, const void *); |
| 653 | memcpy (data + 112, greg, 272); |
| 654 | va_end (ap); |
| 655 | |
| 656 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", |
| 657 | note_type, data, sizeof (data)); |
| 658 | } |
| 659 | } |
| 660 | } |