1 /* AArch64-specific support for ELF. 2 Copyright (C) 2009-2016 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_NC: 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_NC: 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_NC: 487 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: 488 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: 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 } 661
