1 /* tc-tilegx.c -- Assemble for a Tile-Gx chip. 2 Copyright (C) 2011-2016 Free Software Foundation, Inc. 3 4 This file is part of GAS, the GNU Assembler. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 #include "as.h" 22 #include "struc-symbol.h" 23 #include "subsegs.h" 24 25 #include "elf/tilegx.h" 26 #include "opcode/tilegx.h" 27 28 #include "dwarf2dbg.h" 29 #include "dw2gencfi.h" 30 31 #include "safe-ctype.h" 32 33 34 /* Special registers. */ 35 #define TREG_IDN0 57 36 #define TREG_IDN1 58 37 #define TREG_UDN0 59 38 #define TREG_UDN1 60 39 #define TREG_UDN2 61 40 #define TREG_UDN3 62 41 #define TREG_ZERO 63 42 43 44 /* Generic assembler global variables which must be defined by all 45 targets. */ 46 47 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */ 48 int tilegx_cie_data_alignment; 49 50 /* Characters which always start a comment. */ 51 const char comment_chars[] = "#"; 52 53 /* Characters which start a comment at the beginning of a line. */ 54 const char line_comment_chars[] = "#"; 55 56 /* Characters which may be used to separate multiple commands on a 57 single line. */ 58 const char line_separator_chars[] = ";"; 59 60 /* Characters which are used to indicate an exponent in a floating 61 point number. */ 62 const char EXP_CHARS[] = "eE"; 63 64 /* Characters which mean that a number is a floating point constant, 65 as in 0d1.0. */ 66 const char FLT_CHARS[] = "rRsSfFdDxXpP"; 67 68 /* Either 32 or 64. */ 69 static int tilegx_arch_size = 64; 70 71 72 const char * 73 tilegx_target_format (void) 74 { 75 if (target_big_endian) { 76 return tilegx_arch_size == 64 ? "elf64-tilegx-be" : "elf32-tilegx-be"; 77 } else { 78 return tilegx_arch_size == 64 ? "elf64-tilegx-le" : "elf32-tilegx-le"; 79 } 80 } 81 82 83 #define OPTION_32 (OPTION_MD_BASE + 0) 84 #define OPTION_64 (OPTION_MD_BASE + 1) 85 #define OPTION_EB (OPTION_MD_BASE + 2) 86 #define OPTION_EL (OPTION_MD_BASE + 3) 87 88 const char *md_shortopts = "VQ:"; 89 90 struct option md_longopts[] = 91 { 92 {"32", no_argument, NULL, OPTION_32}, 93 {"64", no_argument, NULL, OPTION_64}, 94 {"EB", no_argument, NULL, OPTION_EB }, 95 {"EL", no_argument, NULL, OPTION_EL }, 96 {NULL, no_argument, NULL, 0} 97 }; 98 99 size_t md_longopts_size = sizeof (md_longopts); 100 101 int 102 md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED) 103 { 104 switch (c) 105 { 106 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section 107 should be emitted or not. FIXME: Not implemented. */ 108 case 'Q': 109 break; 110 111 /* -V: SVR4 argument to print version ID. */ 112 case 'V': 113 print_version_id (); 114 break; 115 116 case OPTION_32: 117 tilegx_arch_size = 32; 118 break; 119 120 case OPTION_64: 121 tilegx_arch_size = 64; 122 break; 123 124 case OPTION_EB: 125 target_big_endian = 1; 126 break; 127 128 case OPTION_EL: 129 target_big_endian = 0; 130 break; 131 132 default: 133 return 0; 134 } 135 136 return 1; 137 } 138 139 void 140 md_show_usage (FILE *stream) 141 { 142 fprintf (stream, _("\ 143 -Q ignored\n\ 144 -V print assembler version number\n\ 145 -EB/-EL generate big-endian/little-endian code\n\ 146 --32/--64 generate 32bit/64bit code\n")); 147 } 148 149 150 /* Extra expression types. */ 151 152 #define O_hw0 O_md1 153 #define O_hw1 O_md2 154 #define O_hw2 O_md3 155 #define O_hw3 O_md4 156 #define O_hw0_last O_md5 157 #define O_hw1_last O_md6 158 #define O_hw2_last O_md7 159 #define O_hw0_got O_md8 160 #define O_hw0_last_got O_md9 161 #define O_hw1_last_got O_md10 162 #define O_plt O_md11 163 #define O_hw0_tls_gd O_md12 164 #define O_hw0_last_tls_gd O_md13 165 #define O_hw1_last_tls_gd O_md14 166 #define O_hw0_tls_ie O_md15 167 #define O_hw0_last_tls_ie O_md16 168 #define O_hw1_last_tls_ie O_md17 169 #define O_hw0_tls_le O_md18 170 #define O_hw0_last_tls_le O_md19 171 #define O_hw1_last_tls_le O_md20 172 #define O_tls_gd_call O_md21 173 #define O_tls_gd_add O_md22 174 #define O_tls_ie_load O_md23 175 #define O_tls_add O_md24 176 #define O_hw0_plt O_md25 177 #define O_hw1_plt O_md26 178 #define O_hw1_last_plt O_md27 179 #define O_hw2_last_plt O_md28 180 181 static struct hash_control *special_operator_hash; 182 183 /* Hash tables for instruction mnemonic lookup. */ 184 static struct hash_control *op_hash; 185 186 /* Hash table for spr lookup. */ 187 static struct hash_control *spr_hash; 188 189 /* True temporarily while parsing an SPR expression. This changes the 190 * namespace to include SPR names. */ 191 static int parsing_spr; 192 193 /* Are we currently inside `{ ... }'? */ 194 static int inside_bundle; 195 196 struct tilegx_instruction 197 { 198 const struct tilegx_opcode *opcode; 199 tilegx_pipeline pipe; 200 expressionS operand_values[TILEGX_MAX_OPERANDS]; 201 }; 202 203 /* This keeps track of the current bundle being built up. */ 204 static struct tilegx_instruction current_bundle[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE]; 205 206 /* Index in current_bundle for the next instruction to parse. */ 207 static int current_bundle_index; 208 209 /* Allow 'r63' in addition to 'zero', etc. Normally we disallow this as 210 'zero' is not a real register, so using it accidentally would be a 211 nasty bug. For other registers, such as 'sp', code using multiple names 212 for the same physical register is excessively confusing. 213 214 The '.require_canonical_reg_names' pseudo-op turns this error on, 215 and the '.no_require_canonical_reg_names' pseudo-op turns this off. 216 By default the error is on. */ 217 static int require_canonical_reg_names; 218 219 /* Allow bundles that do undefined or suspicious things like write 220 two different values to the same register at the same time. 221 222 The '.no_allow_suspicious_bundles' pseudo-op turns this error on, 223 and the '.allow_suspicious_bundles' pseudo-op turns this off. */ 224 static int allow_suspicious_bundles; 225 226 227 /* A hash table of main processor registers, mapping each register name 228 to its index. 229 230 Furthermore, if the register number is greater than the number 231 of registers for that processor, the user used an illegal alias 232 for that register (e.g. r63 instead of zero), so we should generate 233 a warning. The attempted register number can be found by clearing 234 NONCANONICAL_REG_NAME_FLAG. */ 235 static struct hash_control *main_reg_hash; 236 237 238 /* We cannot unambiguously store a 0 in a hash table and look it up, 239 so we OR in this flag to every canonical register. */ 240 #define CANONICAL_REG_NAME_FLAG 0x1000 241 242 /* By default we disallow register aliases like r63, but we record 243 them in the hash table in case the .no_require_canonical_reg_names 244 directive is used. Noncanonical names have this value added to them. */ 245 #define NONCANONICAL_REG_NAME_FLAG 0x2000 246 247 /* Discards flags for register hash table entries and returns the 248 reg number. */ 249 #define EXTRACT_REGNO(p) ((p) & 63) 250 251 /* This function is called once, at assembler startup time. It should 252 set up all the tables, etc., that the MD part of the assembler will 253 need. */ 254 255 void 256 md_begin (void) 257 { 258 const struct tilegx_opcode *op; 259 int i; 260 int mach = (tilegx_arch_size == 64) ? bfd_mach_tilegx : bfd_mach_tilegx32; 261 262 if (! bfd_set_arch_mach (stdoutput, bfd_arch_tilegx, mach)) 263 as_warn (_("Could not set architecture and machine")); 264 265 /* Guarantee text section is aligned. */ 266 bfd_set_section_alignment (stdoutput, text_section, 267 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES); 268 269 require_canonical_reg_names = 1; 270 allow_suspicious_bundles = 0; 271 current_bundle_index = 0; 272 inside_bundle = 0; 273 274 tilegx_cie_data_alignment = (tilegx_arch_size == 64 ? -8 : -4); 275 276 /* Initialize special operator hash table. */ 277 special_operator_hash = hash_new (); 278 #define INSERT_SPECIAL_OP(name) \ 279 hash_insert (special_operator_hash, #name, (void *)O_##name) 280 281 INSERT_SPECIAL_OP (hw0); 282 INSERT_SPECIAL_OP (hw1); 283 INSERT_SPECIAL_OP (hw2); 284 INSERT_SPECIAL_OP (hw3); 285 INSERT_SPECIAL_OP (hw0_last); 286 INSERT_SPECIAL_OP (hw1_last); 287 INSERT_SPECIAL_OP (hw2_last); 288 /* hw3_last is a convenience alias for the equivalent hw3. */ 289 hash_insert (special_operator_hash, "hw3_last", (void*)O_hw3); 290 INSERT_SPECIAL_OP (hw0_got); 291 INSERT_SPECIAL_OP (hw0_last_got); 292 INSERT_SPECIAL_OP (hw1_last_got); 293 INSERT_SPECIAL_OP(plt); 294 INSERT_SPECIAL_OP (hw0_tls_gd); 295 INSERT_SPECIAL_OP (hw0_last_tls_gd); 296 INSERT_SPECIAL_OP (hw1_last_tls_gd); 297 INSERT_SPECIAL_OP (hw0_tls_ie); 298 INSERT_SPECIAL_OP (hw0_last_tls_ie); 299 INSERT_SPECIAL_OP (hw1_last_tls_ie); 300 INSERT_SPECIAL_OP (hw0_tls_le); 301 INSERT_SPECIAL_OP (hw0_last_tls_le); 302 INSERT_SPECIAL_OP (hw1_last_tls_le); 303 INSERT_SPECIAL_OP (tls_gd_call); 304 INSERT_SPECIAL_OP (tls_gd_add); 305 INSERT_SPECIAL_OP (tls_ie_load); 306 INSERT_SPECIAL_OP (tls_add); 307 INSERT_SPECIAL_OP (hw0_plt); 308 INSERT_SPECIAL_OP (hw1_plt); 309 INSERT_SPECIAL_OP (hw1_last_plt); 310 INSERT_SPECIAL_OP (hw2_last_plt); 311 #undef INSERT_SPECIAL_OP 312 313 /* Initialize op_hash hash table. */ 314 op_hash = hash_new (); 315 for (op = &tilegx_opcodes[0]; op->name != NULL; op++) 316 { 317 const char *hash_err = hash_insert (op_hash, op->name, (void *)op); 318 if (hash_err != NULL) 319 as_fatal (_("Internal Error: Can't hash %s: %s"), op->name, hash_err); 320 } 321 322 /* Initialize the spr hash table. */ 323 parsing_spr = 0; 324 spr_hash = hash_new (); 325 for (i = 0; i < tilegx_num_sprs; i++) 326 hash_insert (spr_hash, tilegx_sprs[i].name, 327 (void *) &tilegx_sprs[i]); 328 329 /* Set up the main_reg_hash table. We use this instead of 330 creating a symbol in the register section to avoid ambiguities 331 with labels that have the same names as registers. */ 332 main_reg_hash = hash_new (); 333 for (i = 0; i < TILEGX_NUM_REGISTERS; i++) 334 { 335 char buf[64]; 336 337 hash_insert (main_reg_hash, tilegx_register_names[i], 338 (void *) (long) (i | CANONICAL_REG_NAME_FLAG)); 339 340 /* See if we should insert a noncanonical alias, like r63. */ 341 sprintf (buf, "r%d", i); 342 if (strcmp (buf, tilegx_register_names[i]) != 0) 343 hash_insert (main_reg_hash, xstrdup (buf), 344 (void *) (long) (i | NONCANONICAL_REG_NAME_FLAG)); 345 } 346 } 347 348 #define BUNDLE_TEMPLATE_MASK(p0, p1, p2) \ 349 ((p0) | ((p1) << 8) | ((p2) << 16)) 350 #define BUNDLE_TEMPLATE(p0, p1, p2) \ 351 { { (p0), (p1), (p2) }, \ 352 BUNDLE_TEMPLATE_MASK(1 << (p0), 1 << (p1), (1 << (p2))) \ 353 } 354 355 #define NO_PIPELINE TILEGX_NUM_PIPELINE_ENCODINGS 356 357 struct bundle_template 358 { 359 tilegx_pipeline pipe[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE]; 360 unsigned int pipe_mask; 361 }; 362 363 static const struct bundle_template bundle_templates[] = 364 { 365 /* In Y format we must always have something in Y2, since it has 366 no fnop, so this conveys that Y2 must always be used. */ 367 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y0, TILEGX_PIPELINE_Y2, NO_PIPELINE), 368 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y1, TILEGX_PIPELINE_Y2, NO_PIPELINE), 369 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2, TILEGX_PIPELINE_Y0, NO_PIPELINE), 370 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2, TILEGX_PIPELINE_Y1, NO_PIPELINE), 371 372 /* Y format has three instructions. */ 373 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y2), 374 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y1), 375 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y2), 376 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y0), 377 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y1), 378 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y0), 379 380 /* X format has only two instructions. */ 381 BUNDLE_TEMPLATE(TILEGX_PIPELINE_X0, TILEGX_PIPELINE_X1, NO_PIPELINE), 382 BUNDLE_TEMPLATE(TILEGX_PIPELINE_X1, TILEGX_PIPELINE_X0, NO_PIPELINE) 383 }; 384 385 386 static void 387 prepend_nop_to_bundle (tilegx_mnemonic mnemonic) 388 { 389 memmove (¤t_bundle[1], ¤t_bundle[0], 390 current_bundle_index * sizeof current_bundle[0]); 391 current_bundle[0].opcode = &tilegx_opcodes[mnemonic]; 392 ++current_bundle_index; 393 } 394 395 static tilegx_bundle_bits 396 insert_operand (tilegx_bundle_bits bits, 397 const struct tilegx_operand *operand, 398 int operand_value, 399 const char *file, 400 unsigned lineno) 401 { 402 /* Range-check the immediate. */ 403 int num_bits = operand->num_bits; 404 405 operand_value >>= operand->rightshift; 406 407 if (bfd_check_overflow (operand->is_signed 408 ? complain_overflow_signed 409 : complain_overflow_unsigned, 410 num_bits, 411 0, 412 bfd_arch_bits_per_address (stdoutput), 413 operand_value) 414 != bfd_reloc_ok) 415 { 416 offsetT min, max; 417 if (operand->is_signed) 418 { 419 min = -(1 << (num_bits - 1)); 420 max = (1 << (num_bits - 1)) - 1; 421 } 422 else 423 { 424 min = 0; 425 max = (1 << num_bits) - 1; 426 } 427 as_bad_value_out_of_range (_("operand"), operand_value, min, max, 428 file, lineno); 429 } 430 431 /* Write out the bits for the immediate. */ 432 return bits | operand->insert (operand_value); 433 } 434 435 436 static int 437 apply_special_operator (operatorT op, offsetT num, const char *file, 438 unsigned lineno) 439 { 440 int ret; 441 int check_shift = -1; 442 443 switch (op) 444 { 445 case O_hw0_last: 446 check_shift = 0; 447 /* Fall through. */ 448 case O_hw0: 449 ret = (signed short)num; 450 break; 451 452 case O_hw1_last: 453 check_shift = 16; 454 /* Fall through. */ 455 case O_hw1: 456 ret = (signed short)(num >> 16); 457 break; 458 459 case O_hw2_last: 460 check_shift = 32; 461 /* Fall through. */ 462 case O_hw2: 463 ret = (signed short)(num >> 32); 464 break; 465 466 case O_hw3: 467 ret = (signed short)(num >> 48); 468 break; 469 470 default: 471 abort (); 472 break; 473 } 474 475 if (check_shift >= 0 && ret != (num >> check_shift)) 476 { 477 as_bad_value_out_of_range (_("operand"), num, 478 ~0ULL << (check_shift + 16 - 1), 479 ~0ULL >> (64 - (check_shift + 16 - 1)), 480 file, lineno); 481 } 482 483 return ret; 484 } 485 486 static tilegx_bundle_bits 487 emit_tilegx_instruction (tilegx_bundle_bits bits, 488 int num_operands, 489 const unsigned char *operands, 490 expressionS *operand_values, 491 char *bundle_start) 492 { 493 int i; 494 495 for (i = 0; i < num_operands; i++) 496 { 497 const struct tilegx_operand *operand = 498 &tilegx_operands[operands[i]]; 499 expressionS *operand_exp = &operand_values[i]; 500 int is_pc_relative = operand->is_pc_relative; 501 502 if (operand_exp->X_op == O_register 503 || (operand_exp->X_op == O_constant && !is_pc_relative)) 504 { 505 /* We know what the bits are right now, so insert them. */ 506 bits = insert_operand (bits, operand, operand_exp->X_add_number, 507 NULL, 0); 508 } 509 else 510 { 511 bfd_reloc_code_real_type reloc = operand->default_reloc; 512 expressionS subexp; 513 int die = 0, use_subexp = 0, require_symbol = 0; 514 fixS *fixP; 515 516 /* Take an expression like hw0(x) and turn it into x with 517 a different reloc type. */ 518 switch (operand_exp->X_op) 519 { 520 #define HANDLE_OP16(suffix) \ 521 switch (reloc) \ 522 { \ 523 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST: \ 524 reloc = BFD_RELOC_TILEGX_IMM16_X0_##suffix; \ 525 break; \ 526 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST: \ 527 reloc = BFD_RELOC_TILEGX_IMM16_X1_##suffix; \ 528 break; \ 529 default: \ 530 die = 1; \ 531 break; \ 532 } \ 533 use_subexp = 1 534 535 case O_hw0: 536 HANDLE_OP16 (HW0); 537 break; 538 539 case O_hw1: 540 HANDLE_OP16 (HW1); 541 break; 542 543 case O_hw2: 544 HANDLE_OP16 (HW2); 545 break; 546 547 case O_hw3: 548 HANDLE_OP16 (HW3); 549 break; 550 551 case O_hw0_last: 552 HANDLE_OP16 (HW0_LAST); 553 break; 554 555 case O_hw1_last: 556 HANDLE_OP16 (HW1_LAST); 557 break; 558 559 case O_hw2_last: 560 HANDLE_OP16 (HW2_LAST); 561 break; 562 563 case O_hw0_got: 564 HANDLE_OP16 (HW0_GOT); 565 require_symbol = 1; 566 break; 567 568 case O_hw0_last_got: 569 HANDLE_OP16 (HW0_LAST_GOT); 570 require_symbol = 1; 571 break; 572 573 case O_hw1_last_got: 574 HANDLE_OP16 (HW1_LAST_GOT); 575 require_symbol = 1; 576 break; 577 578 case O_hw0_tls_gd: 579 HANDLE_OP16 (HW0_TLS_GD); 580 require_symbol = 1; 581 break; 582 583 case O_hw0_last_tls_gd: 584 HANDLE_OP16 (HW0_LAST_TLS_GD); 585 require_symbol = 1; 586 break; 587 588 case O_hw1_last_tls_gd: 589 HANDLE_OP16 (HW1_LAST_TLS_GD); 590 require_symbol = 1; 591 break; 592 593 case O_hw0_tls_ie: 594 HANDLE_OP16 (HW0_TLS_IE); 595 require_symbol = 1; 596 break; 597 598 case O_hw0_last_tls_ie: 599 HANDLE_OP16 (HW0_LAST_TLS_IE); 600 require_symbol = 1; 601 break; 602 603 case O_hw1_last_tls_ie: 604 HANDLE_OP16 (HW1_LAST_TLS_IE); 605 require_symbol = 1; 606 break; 607 608 case O_hw0_tls_le: 609 HANDLE_OP16 (HW0_TLS_LE); 610 require_symbol = 1; 611 break; 612 613 case O_hw0_last_tls_le: 614 HANDLE_OP16 (HW0_LAST_TLS_LE); 615 require_symbol = 1; 616 break; 617 618 case O_hw1_last_tls_le: 619 HANDLE_OP16 (HW1_LAST_TLS_LE); 620 require_symbol = 1; 621 break; 622 623 case O_hw0_plt: 624 HANDLE_OP16 (HW0_PLT_PCREL); 625 break; 626 627 case O_hw1_plt: 628 HANDLE_OP16 (HW1_PLT_PCREL); 629 break; 630 631 case O_hw1_last_plt: 632 HANDLE_OP16 (HW1_LAST_PLT_PCREL); 633 break; 634 635 case O_hw2_last_plt: 636 HANDLE_OP16 (HW2_LAST_PLT_PCREL); 637 break; 638 639 #undef HANDLE_OP16 640 641 case O_plt: 642 switch (reloc) 643 { 644 case BFD_RELOC_TILEGX_JUMPOFF_X1: 645 reloc = BFD_RELOC_TILEGX_JUMPOFF_X1_PLT; 646 break; 647 default: 648 die = 1; 649 break; 650 } 651 use_subexp = 1; 652 require_symbol = 1; 653 break; 654 655 case O_tls_gd_call: 656 switch (reloc) 657 { 658 case BFD_RELOC_TILEGX_JUMPOFF_X1: 659 reloc = BFD_RELOC_TILEGX_TLS_GD_CALL; 660 break; 661 default: 662 die = 1; 663 break; 664 } 665 use_subexp = 1; 666 require_symbol = 1; 667 break; 668 669 case O_tls_gd_add: 670 switch (reloc) 671 { 672 case BFD_RELOC_TILEGX_IMM8_X0: 673 reloc = BFD_RELOC_TILEGX_IMM8_X0_TLS_GD_ADD; 674 break; 675 case BFD_RELOC_TILEGX_IMM8_X1: 676 reloc = BFD_RELOC_TILEGX_IMM8_X1_TLS_GD_ADD; 677 break; 678 case BFD_RELOC_TILEGX_IMM8_Y0: 679 reloc = BFD_RELOC_TILEGX_IMM8_Y0_TLS_GD_ADD; 680 break; 681 case BFD_RELOC_TILEGX_IMM8_Y1: 682 reloc = BFD_RELOC_TILEGX_IMM8_Y1_TLS_GD_ADD; 683 break; 684 default: 685 die = 1; 686 break; 687 } 688 use_subexp = 1; 689 require_symbol = 1; 690 break; 691 692 case O_tls_ie_load: 693 switch (reloc) 694 { 695 case BFD_RELOC_TILEGX_IMM8_X1: 696 reloc = BFD_RELOC_TILEGX_TLS_IE_LOAD; 697 break; 698 default: 699 die = 1; 700 break; 701 } 702 use_subexp = 1; 703 require_symbol = 1; 704 break; 705 706 case O_tls_add: 707 switch (reloc) 708 { 709 case BFD_RELOC_TILEGX_IMM8_X0: 710 reloc = BFD_RELOC_TILEGX_IMM8_X0_TLS_ADD; 711 break; 712 case BFD_RELOC_TILEGX_IMM8_X1: 713 reloc = BFD_RELOC_TILEGX_IMM8_X1_TLS_ADD; 714 break; 715 case BFD_RELOC_TILEGX_IMM8_Y0: 716 reloc = BFD_RELOC_TILEGX_IMM8_Y0_TLS_ADD; 717 break; 718 case BFD_RELOC_TILEGX_IMM8_Y1: 719 reloc = BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD; 720 break; 721 default: 722 die = 1; 723 break; 724 } 725 use_subexp = 1; 726 require_symbol = 1; 727 break; 728 729 default: 730 /* Do nothing. */ 731 break; 732 } 733 734 if (die) 735 { 736 as_bad (_("Invalid operator for operand.")); 737 } 738 else if (use_subexp) 739 { 740 /* Now that we've changed the reloc, change ha16(x) into x, 741 etc. */ 742 743 if (!operand_exp->X_add_symbol->sy_flags.sy_local_symbol 744 && operand_exp->X_add_symbol->sy_value.X_md) 745 { 746 /* HACK: We used X_md to mark this symbol as a fake wrapper 747 around a real expression. To unwrap it, we just grab its 748 value here. */ 749 operand_exp = &operand_exp->X_add_symbol->sy_value; 750 751 if (require_symbol) 752 { 753 /* Look at the expression, and reject it if it's not a 754 plain symbol. */ 755 if (operand_exp->X_op != O_symbol 756 || operand_exp->X_add_number != 0) 757 as_bad (_("Operator may only be applied to symbols.")); 758 } 759 } 760 else 761 { 762 /* The value of this expression is an actual symbol, so 763 turn that into an expression. */ 764 memset (&subexp, 0, sizeof subexp); 765 subexp.X_op = O_symbol; 766 subexp.X_add_symbol = operand_exp->X_add_symbol; 767 operand_exp = &subexp; 768 } 769 } 770 771 /* Create a fixup to handle this later. */ 772 fixP = fix_new_exp (frag_now, 773 bundle_start - frag_now->fr_literal, 774 (operand->num_bits + 7) >> 3, 775 operand_exp, 776 is_pc_relative, 777 reloc); 778 fixP->tc_fix_data = operand; 779 780 /* Don't do overflow checking if we are applying a function like 781 ha16. */ 782 fixP->fx_no_overflow |= use_subexp; 783 } 784 } 785 return bits; 786 } 787 788 789 /* Detects and complains if two instructions in current_bundle write 790 to the same register, either implicitly or explicitly, or if a 791 read-only register is written. */ 792 static void 793 check_illegal_reg_writes (void) 794 { 795 BFD_HOST_U_64_BIT all_regs_written = 0; 796 int j; 797 798 for (j = 0; j < current_bundle_index; j++) 799 { 800 const struct tilegx_instruction *instr = ¤t_bundle[j]; 801 int k; 802 BFD_HOST_U_64_BIT regs = 803 ((BFD_HOST_U_64_BIT)1) << instr->opcode->implicitly_written_register; 804 BFD_HOST_U_64_BIT conflict; 805 806 for (k = 0; k < instr->opcode->num_operands; k++) 807 { 808 const struct tilegx_operand *operand = 809 &tilegx_operands[instr->opcode->operands[instr->pipe][k]]; 810 811 if (operand->is_dest_reg) 812 { 813 int regno = instr->operand_values[k].X_add_number; 814 BFD_HOST_U_64_BIT mask = ((BFD_HOST_U_64_BIT)1) << regno; 815 816 if ((mask & ( (((BFD_HOST_U_64_BIT)1) << TREG_IDN1) 817 | (((BFD_HOST_U_64_BIT)1) << TREG_UDN1) 818 | (((BFD_HOST_U_64_BIT)1) << TREG_UDN2) 819 | (((BFD_HOST_U_64_BIT)1) << TREG_UDN3))) != 0 820 && !allow_suspicious_bundles) 821 { 822 as_bad (_("Writes to register '%s' are not allowed."), 823 tilegx_register_names[regno]); 824 } 825 826 regs |= mask; 827 } 828 } 829 830 /* Writing to the zero register doesn't count. */ 831 regs &= ~(((BFD_HOST_U_64_BIT)1) << TREG_ZERO); 832 833 conflict = all_regs_written & regs; 834 if (conflict != 0 && !allow_suspicious_bundles) 835 { 836 /* Find which register caused the conflict. */ 837 const char *conflicting_reg_name = "???"; 838 int i; 839 840 for (i = 0; i < TILEGX_NUM_REGISTERS; i++) 841 { 842 if (((conflict >> i) & 1) != 0) 843 { 844 conflicting_reg_name = tilegx_register_names[i]; 845 break; 846 } 847 } 848 849 as_bad (_("Two instructions in the same bundle both write " 850 "to register %s, which is not allowed."), 851 conflicting_reg_name); 852 } 853 854 all_regs_written |= regs; 855 } 856 } 857 858 859 static void 860 tilegx_flush_bundle (void) 861 { 862 unsigned i; 863 int j; 864 addressT addr_mod; 865 unsigned compatible_pipes; 866 const struct bundle_template *match; 867 char *f; 868 869 inside_bundle = 0; 870 871 switch (current_bundle_index) 872 { 873 case 0: 874 /* No instructions. */ 875 return; 876 case 1: 877 if (current_bundle[0].opcode->can_bundle) 878 { 879 /* Simplify later logic by adding an explicit fnop. */ 880 prepend_nop_to_bundle (TILEGX_OPC_FNOP); 881 } 882 else 883 { 884 /* This instruction cannot be bundled with anything else. 885 Prepend an explicit 'nop', rather than an 'fnop', because 886 fnops can be replaced by later binary-processing tools while 887 nops cannot. */ 888 prepend_nop_to_bundle (TILEGX_OPC_NOP); 889 } 890 break; 891 default: 892 if (!allow_suspicious_bundles) 893 { 894 /* Make sure all instructions can be bundled with other 895 instructions. */ 896 const struct tilegx_opcode *cannot_bundle = NULL; 897 bfd_boolean seen_non_nop = FALSE; 898 899 for (j = 0; j < current_bundle_index; j++) 900 { 901 const struct tilegx_opcode *op = current_bundle[j].opcode; 902 903 if (!op->can_bundle && cannot_bundle == NULL) 904 cannot_bundle = op; 905 else if (op->mnemonic != TILEGX_OPC_NOP 906 && op->mnemonic != TILEGX_OPC_INFO 907 && op->mnemonic != TILEGX_OPC_INFOL) 908 seen_non_nop = TRUE; 909 } 910 911 if (cannot_bundle != NULL && seen_non_nop) 912 { 913 current_bundle_index = 0; 914 as_bad (_("'%s' may not be bundled with other instructions."), 915 cannot_bundle->name); 916 return; 917 } 918 } 919 break; 920 } 921 922 compatible_pipes = 923 BUNDLE_TEMPLATE_MASK(current_bundle[0].opcode->pipes, 924 current_bundle[1].opcode->pipes, 925 (current_bundle_index == 3 926 ? current_bundle[2].opcode->pipes 927 : (1 << NO_PIPELINE))); 928 929 /* Find a template that works, if any. */ 930 match = NULL; 931 for (i = 0; i < sizeof bundle_templates / sizeof bundle_templates[0]; i++) 932 { 933 const struct bundle_template *b = &bundle_templates[i]; 934 if ((b->pipe_mask & compatible_pipes) == b->pipe_mask) 935 { 936 match = b; 937 break; 938 } 939 } 940 941 if (match == NULL) 942 { 943 current_bundle_index = 0; 944 as_bad (_("Invalid combination of instructions for bundle.")); 945 return; 946 } 947 948 /* If the section seems to have no alignment set yet, go ahead and 949 make it large enough to hold code. */ 950 if (bfd_get_section_alignment (stdoutput, now_seg) == 0) 951 bfd_set_section_alignment (stdoutput, now_seg, 952 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES); 953 954 for (j = 0; j < current_bundle_index; j++) 955 current_bundle[j].pipe = match->pipe[j]; 956 957 if (current_bundle_index == 2 && !tilegx_is_x_pipeline (match->pipe[0])) 958 { 959 /* We are in Y mode with only two instructions, so add an FNOP. */ 960 prepend_nop_to_bundle (TILEGX_OPC_FNOP); 961 962 /* Figure out what pipe the fnop must be in via arithmetic. 963 * p0 + p1 + p2 must sum to the sum of TILEGX_PIPELINE_Y[012]. */ 964 current_bundle[0].pipe = 965 (tilegx_pipeline)((TILEGX_PIPELINE_Y0 966 + TILEGX_PIPELINE_Y1 967 + TILEGX_PIPELINE_Y2) - 968 (current_bundle[1].pipe + current_bundle[2].pipe)); 969 } 970 971 check_illegal_reg_writes (); 972 973 f = frag_more (TILEGX_BUNDLE_SIZE_IN_BYTES); 974 975 /* Check to see if this bundle is at an offset that is a multiple of 8-bytes 976 from the start of the frag. */ 977 addr_mod = frag_now_fix () & (TILEGX_BUNDLE_ALIGNMENT_IN_BYTES - 1); 978 if (frag_now->has_code && frag_now->insn_addr != addr_mod) 979 as_bad (_("instruction address is not a multiple of 8")); 980 frag_now->insn_addr = addr_mod; 981 frag_now->has_code = 1; 982 983 tilegx_bundle_bits bits = 0; 984 for (j = 0; j < current_bundle_index; j++) 985 { 986 struct tilegx_instruction *instr = ¤t_bundle[j]; 987 tilegx_pipeline pipeline = instr->pipe; 988 const struct tilegx_opcode *opcode = instr->opcode; 989 990 bits |= emit_tilegx_instruction (opcode->fixed_bit_values[pipeline], 991 opcode->num_operands, 992 &opcode->operands[pipeline][0], 993 instr->operand_values, 994 f); 995 } 996 997 number_to_chars_littleendian (f, bits, 8); 998 current_bundle_index = 0; 999 1000 /* Emit DWARF2 debugging information. */ 1001 dwarf2_emit_insn (TILEGX_BUNDLE_SIZE_IN_BYTES); 1002 } 1003 1004 1005 /* Extend the expression parser to handle hw0(label), etc. 1006 as well as SPR names when in the context of parsing an SPR. */ 1007 1008 int 1009 tilegx_parse_name (char *name, expressionS *e, char *nextcharP) 1010 { 1011 operatorT op = O_illegal; 1012 1013 if (parsing_spr) 1014 { 1015 void* val = hash_find (spr_hash, name); 1016 if (val == NULL) 1017 return 0; 1018 1019 memset (e, 0, sizeof *e); 1020 e->X_op = O_constant; 1021 e->X_add_number = ((const struct tilegx_spr *)val)->number; 1022 return 1; 1023 } 1024 1025 if (*nextcharP != '(') 1026 { 1027 /* hw0, etc. not followed by a paren is just a label with that name. */ 1028 return 0; 1029 } 1030 else 1031 { 1032 /* Look up the operator in our table. */ 1033 void* val = hash_find (special_operator_hash, name); 1034 if (val == 0) 1035 return 0; 1036 op = (operatorT)(long)val; 1037 } 1038 1039 /* Restore old '(' and skip it. */ 1040 *input_line_pointer = '('; 1041 ++input_line_pointer; 1042 1043 expression (e); 1044 1045 if (*input_line_pointer != ')') 1046 { 1047 as_bad (_("Missing ')'")); 1048 *nextcharP = *input_line_pointer; 1049 return 0; 1050 } 1051 /* Skip ')'. */ 1052 ++input_line_pointer; 1053 1054 if (e->X_op == O_register || e->X_op == O_absent) 1055 { 1056 as_bad (_("Invalid expression.")); 1057 e->X_op = O_constant; 1058 e->X_add_number = 0; 1059 } 1060 else 1061 { 1062 /* Wrap subexpression with a unary operator. */ 1063 symbolS *sym = make_expr_symbol (e); 1064 1065 if (sym != e->X_add_symbol) 1066 { 1067 /* HACK: mark this symbol as a temporary wrapper around a proper 1068 expression, so we can unwrap it later once we have communicated 1069 the relocation type. */ 1070 sym->sy_value.X_md = 1; 1071 } 1072 1073 memset (e, 0, sizeof *e); 1074 e->X_op = op; 1075 e->X_add_symbol = sym; 1076 e->X_add_number = 0; 1077 } 1078 1079 *nextcharP = *input_line_pointer; 1080 return 1; 1081 } 1082 1083 1084 /* Parses an expression which must be a register name. */ 1085 1086 static void 1087 parse_reg_expression (expressionS* expression) 1088 { 1089 char *regname; 1090 char terminating_char; 1091 void *pval; 1092 int regno_and_flags; 1093 int regno; 1094 1095 /* Zero everything to make sure we don't miss any flags. */ 1096 memset (expression, 0, sizeof *expression); 1097 1098 terminating_char = get_symbol_name (®name); 1099 1100 pval = hash_find (main_reg_hash, regname); 1101 if (pval == NULL) 1102 as_bad (_("Expected register, got '%s'."), regname); 1103 1104 regno_and_flags = (int)(size_t)pval; 1105 regno = EXTRACT_REGNO(regno_and_flags); 1106 1107 if ((regno_and_flags & NONCANONICAL_REG_NAME_FLAG) 1108 && require_canonical_reg_names) 1109 as_warn (_("Found use of non-canonical register name %s; " 1110 "use %s instead."), 1111 regname, tilegx_register_names[regno]); 1112 1113 /* Restore the old character following the register name. */ 1114 (void) restore_line_pointer (terminating_char); 1115 1116 /* Fill in the expression fields to indicate it's a register. */ 1117 expression->X_op = O_register; 1118 expression->X_add_number = regno; 1119 } 1120 1121 1122 /* Parses and type-checks comma-separated operands in input_line_pointer. */ 1123 1124 static void 1125 parse_operands (const char *opcode_name, 1126 const unsigned char *operands, 1127 int num_operands, 1128 expressionS *operand_values) 1129 { 1130 int i; 1131 1132 memset (operand_values, 0, num_operands * sizeof operand_values[0]); 1133 1134 SKIP_WHITESPACE (); 1135 for (i = 0; i < num_operands; i++) 1136 { 1137 tilegx_operand_type type = tilegx_operands[operands[i]].type; 1138 1139 SKIP_WHITESPACE (); 1140 1141 if (type == TILEGX_OP_TYPE_REGISTER) 1142 { 1143 parse_reg_expression (&operand_values[i]); 1144 } 1145 else if (*input_line_pointer == '}') 1146 { 1147 operand_values[i].X_op = O_absent; 1148 } 1149 else if (type == TILEGX_OP_TYPE_SPR) 1150 { 1151 /* Modify the expression parser to add SPRs to the namespace. */ 1152 parsing_spr = 1; 1153 expression (&operand_values[i]); 1154 parsing_spr = 0; 1155 } 1156 else 1157 { 1158 expression (&operand_values[i]); 1159 } 1160 1161 SKIP_WHITESPACE (); 1162 1163 if (i + 1 < num_operands) 1164 { 1165 int separator = (unsigned char)*input_line_pointer++; 1166 1167 if (is_end_of_line[separator] || (separator == '}')) 1168 { 1169 as_bad (_("Too few operands to '%s'."), opcode_name); 1170 return; 1171 } 1172 else if (separator != ',') 1173 { 1174 as_bad (_("Unexpected character '%c' after operand %d to %s."), 1175 (char)separator, i + 1, opcode_name); 1176 return; 1177 } 1178 } 1179 1180 /* Arbitrarily use the first valid pipe to get the operand type, 1181 since they are all the same. */ 1182 switch (tilegx_operands[operands[i]].type) 1183 { 1184 case TILEGX_OP_TYPE_REGISTER: 1185 /* Handled in parse_reg_expression already. */ 1186 break; 1187 case TILEGX_OP_TYPE_SPR: 1188 /* Fall through */ 1189 case TILEGX_OP_TYPE_IMMEDIATE: 1190 /* Fall through */ 1191 case TILEGX_OP_TYPE_ADDRESS: 1192 if ( operand_values[i].X_op == O_register 1193 || operand_values[i].X_op == O_illegal 1194 || operand_values[i].X_op == O_absent) 1195 as_bad (_("Expected immediate expression")); 1196 break; 1197 default: 1198 abort(); 1199 } 1200 } 1201 1202 if (!is_end_of_line[(unsigned char)*input_line_pointer]) 1203 { 1204 switch (*input_line_pointer) 1205 { 1206 case '}': 1207 if (!inside_bundle) 1208 as_bad (_("Found '}' when not bundling.")); 1209 ++input_line_pointer; 1210 inside_bundle = 0; 1211 demand_empty_rest_of_line (); 1212 break; 1213 1214 case ',': 1215 as_bad (_("Too many operands")); 1216 break; 1217 1218 default: 1219 /* Use default error for unrecognized garbage. */ 1220 demand_empty_rest_of_line (); 1221 break; 1222 } 1223 } 1224 } 1225 1226 1227 /* This is the guts of the machine-dependent assembler. STR points to a 1228 machine dependent instruction. This function is supposed to emit the 1229 frags/bytes it assembles to. */ 1230 1231 void 1232 md_assemble (char *str) 1233 { 1234 char old_char; 1235 size_t opname_len; 1236 char *old_input_line_pointer; 1237 const struct tilegx_opcode *op; 1238 int first_pipe; 1239 1240 /* Split off the opcode and look it up. */ 1241 opname_len = strcspn (str, " {}"); 1242 old_char = str[opname_len]; 1243 str[opname_len] = '\0'; 1244 1245 op = hash_find(op_hash, str); 1246 str[opname_len] = old_char; 1247 if (op == NULL) 1248 { 1249 as_bad (_("Unknown opcode `%.*s'."), (int)opname_len, str); 1250 return; 1251 } 1252 1253 /* Prepare to parse the operands. */ 1254 old_input_line_pointer = input_line_pointer; 1255 input_line_pointer = str + opname_len; 1256 SKIP_WHITESPACE (); 1257 1258 if (current_bundle_index == TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE) 1259 { 1260 as_bad (_("Too many instructions for bundle.")); 1261 tilegx_flush_bundle (); 1262 } 1263 1264 /* Make sure we have room for the upcoming bundle before we 1265 create any fixups. Otherwise if we have to switch to a new 1266 frag the fixup dot_value fields will be wrong. */ 1267 frag_grow (TILEGX_BUNDLE_SIZE_IN_BYTES); 1268 1269 /* Find a valid pipe for this opcode. */ 1270 for (first_pipe = 0; (op->pipes & (1 << first_pipe)) == 0; first_pipe++) 1271 ; 1272 1273 /* Call the function that assembles this instruction. */ 1274 current_bundle[current_bundle_index].opcode = op; 1275 parse_operands (op->name, 1276 &op->operands[first_pipe][0], 1277 op->num_operands, 1278 current_bundle[current_bundle_index].operand_values); 1279 ++current_bundle_index; 1280 1281 /* Restore the saved value of input_line_pointer. */ 1282 input_line_pointer = old_input_line_pointer; 1283 1284 /* If we weren't inside curly braces, go ahead and emit 1285 this lone instruction as a bundle right now. */ 1286 if (!inside_bundle) 1287 tilegx_flush_bundle (); 1288 } 1289 1290 1291 static void 1292 s_require_canonical_reg_names (int require) 1293 { 1294 demand_empty_rest_of_line (); 1295 require_canonical_reg_names = require; 1296 } 1297 1298 static void 1299 s_allow_suspicious_bundles (int allow) 1300 { 1301 demand_empty_rest_of_line (); 1302 allow_suspicious_bundles = allow; 1303 } 1304 1305 const pseudo_typeS md_pseudo_table[] = 1306 { 1307 {"align", s_align_bytes, 0}, /* Defaulting is invalid (0). */ 1308 {"word", cons, 4}, 1309 {"require_canonical_reg_names", s_require_canonical_reg_names, 1 }, 1310 {"no_require_canonical_reg_names", s_require_canonical_reg_names, 0 }, 1311 {"allow_suspicious_bundles", s_allow_suspicious_bundles, 1 }, 1312 {"no_allow_suspicious_bundles", s_allow_suspicious_bundles, 0 }, 1313 { NULL, 0, 0 } 1314 }; 1315 1316 /* Equal to MAX_PRECISION in atof-ieee.c */ 1317 #define MAX_LITTLENUMS 6 1318 1319 void 1320 md_number_to_chars (char * buf, valueT val, int n) 1321 { 1322 if (target_big_endian) 1323 number_to_chars_bigendian (buf, val, n); 1324 else 1325 number_to_chars_littleendian (buf, val, n); 1326 } 1327 1328 /* Turn the string pointed to by litP into a floating point constant 1329 of type TYPE, and emit the appropriate bytes. The number of 1330 LITTLENUMS emitted is stored in *SIZEP. An error message is 1331 returned, or NULL on OK. */ 1332 1333 const char * 1334 md_atof (int type, char *litP, int *sizeP) 1335 { 1336 int prec; 1337 LITTLENUM_TYPE words[MAX_LITTLENUMS]; 1338 LITTLENUM_TYPE *wordP; 1339 char *t; 1340 1341 switch (type) 1342 { 1343 case 'f': 1344 case 'F': 1345 prec = 2; 1346 break; 1347 1348 case 'd': 1349 case 'D': 1350 prec = 4; 1351 break; 1352 1353 default: 1354 *sizeP = 0; 1355 return _("Bad call to md_atof ()"); 1356 } 1357 t = atof_ieee (input_line_pointer, type, words); 1358 if (t) 1359 input_line_pointer = t; 1360 1361 *sizeP = prec * sizeof (LITTLENUM_TYPE); 1362 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with 1363 the bigendian 386. */ 1364 for (wordP = words + prec - 1; prec--;) 1365 { 1366 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); 1367 litP += sizeof (LITTLENUM_TYPE); 1368 } 1369 return 0; 1370 } 1371 1372 1373 /* We have no need to default values of symbols. */ 1374 1375 symbolS * 1376 md_undefined_symbol (char *name ATTRIBUTE_UNUSED) 1377 { 1378 return NULL; 1379 } 1380 1381 1382 void 1383 tilegx_cons_fix_new (fragS *frag, 1384 int where, 1385 int nbytes, 1386 expressionS *exp) 1387 { 1388 expressionS subexp; 1389 bfd_reloc_code_real_type reloc = BFD_RELOC_NONE; 1390 int no_overflow = 0; 1391 fixS *fixP; 1392 1393 /* See if it's one of our special functions. */ 1394 switch (exp->X_op) 1395 { 1396 case O_hw0: 1397 reloc = BFD_RELOC_TILEGX_HW0; 1398 no_overflow = 1; 1399 break; 1400 case O_hw1: 1401 reloc = BFD_RELOC_TILEGX_HW1; 1402 no_overflow = 1; 1403 break; 1404 case O_hw2: 1405 reloc = BFD_RELOC_TILEGX_HW2; 1406 no_overflow = 1; 1407 break; 1408 case O_hw3: 1409 reloc = BFD_RELOC_TILEGX_HW3; 1410 no_overflow = 1; 1411 break; 1412 case O_hw0_last: 1413 reloc = BFD_RELOC_TILEGX_HW0_LAST; 1414 break; 1415 case O_hw1_last: 1416 reloc = BFD_RELOC_TILEGX_HW1_LAST; 1417 break; 1418 case O_hw2_last: 1419 reloc = BFD_RELOC_TILEGX_HW2_LAST; 1420 break; 1421 1422 default: 1423 /* Do nothing. */ 1424 break; 1425 } 1426 1427 if (reloc != BFD_RELOC_NONE) 1428 { 1429 if (nbytes != 2) 1430 { 1431 as_bad (_("This operator only produces two byte values.")); 1432 nbytes = 2; 1433 } 1434 1435 memset (&subexp, 0, sizeof subexp); 1436 subexp.X_op = O_symbol; 1437 subexp.X_add_symbol = exp->X_add_symbol; 1438 exp = &subexp; 1439 } 1440 else 1441 { 1442 switch (nbytes) 1443 { 1444 case 1: 1445 reloc = BFD_RELOC_8; 1446 break; 1447 case 2: 1448 reloc = BFD_RELOC_16; 1449 break; 1450 case 4: 1451 reloc = BFD_RELOC_32; 1452 break; 1453 case 8: 1454 reloc = BFD_RELOC_64; 1455 break; 1456 default: 1457 as_bad (_("unsupported BFD relocation size %d"), nbytes); 1458 reloc = BFD_RELOC_64; 1459 break; 1460 } 1461 } 1462 1463 fixP = fix_new_exp (frag, where, nbytes, exp, 0, reloc); 1464 fixP->tc_fix_data = NULL; 1465 fixP->fx_no_overflow |= no_overflow; 1466 } 1467 1468 1469 void 1470 md_apply_fix (fixS *fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED) 1471 { 1472 const struct tilegx_operand *operand; 1473 valueT value = *valP; 1474 operatorT special; 1475 char *p; 1476 1477 /* Leave these for the linker. */ 1478 if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT 1479 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) 1480 return; 1481 1482 if (fixP->fx_subsy != (symbolS *) NULL) 1483 { 1484 /* We can't actually support subtracting a symbol. */ 1485 as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); 1486 } 1487 1488 /* Correct relocation types for pc-relativeness. */ 1489 switch (fixP->fx_r_type) 1490 { 1491 #define FIX_PCREL(rtype) \ 1492 case rtype: \ 1493 if (fixP->fx_pcrel) \ 1494 fixP->fx_r_type = rtype##_PCREL; \ 1495 break; \ 1496 \ 1497 case rtype##_PCREL: \ 1498 if (!fixP->fx_pcrel) \ 1499 fixP->fx_r_type = rtype; \ 1500 break 1501 1502 #define FIX_PLT_PCREL(rtype) \ 1503 case rtype##_PLT_PCREL: \ 1504 if (!fixP->fx_pcrel) \ 1505 fixP->fx_r_type = rtype; \ 1506 \ 1507 break; 1508 1509 FIX_PCREL (BFD_RELOC_8); 1510 FIX_PCREL (BFD_RELOC_16); 1511 FIX_PCREL (BFD_RELOC_32); 1512 FIX_PCREL (BFD_RELOC_64); 1513 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW0); 1514 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW0); 1515 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1); 1516 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1); 1517 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW2); 1518 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW2); 1519 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW3); 1520 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW3); 1521 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST); 1522 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST); 1523 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST); 1524 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST); 1525 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST); 1526 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST); 1527 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW0); 1528 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW0); 1529 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1); 1530 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1); 1531 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST); 1532 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST); 1533 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST); 1534 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST); 1535 1536 #undef FIX_PCREL 1537 1538 default: 1539 /* Do nothing */ 1540 break; 1541 } 1542 1543 if (fixP->fx_addsy != NULL) 1544 { 1545 #ifdef OBJ_ELF 1546 switch (fixP->fx_r_type) 1547 { 1548 case BFD_RELOC_TILEGX_IMM8_X0_TLS_ADD: 1549 case BFD_RELOC_TILEGX_IMM8_X1_TLS_ADD: 1550 case BFD_RELOC_TILEGX_IMM8_Y0_TLS_ADD: 1551 case BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD: 1552 case BFD_RELOC_TILEGX_IMM8_X0_TLS_GD_ADD: 1553 case BFD_RELOC_TILEGX_IMM8_X1_TLS_GD_ADD: 1554 case BFD_RELOC_TILEGX_IMM8_Y0_TLS_GD_ADD: 1555 case BFD_RELOC_TILEGX_IMM8_Y1_TLS_GD_ADD: 1556 case BFD_RELOC_TILEGX_IMM16_X0_HW0_TLS_GD: 1557 case BFD_RELOC_TILEGX_IMM16_X1_HW0_TLS_GD: 1558 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1559 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1560 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1561 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1562 case BFD_RELOC_TILEGX_IMM16_X0_HW0_TLS_IE: 1563 case BFD_RELOC_TILEGX_IMM16_X1_HW0_TLS_IE: 1564 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1565 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1566 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1567 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1568 case BFD_RELOC_TILEGX_IMM16_X0_HW0_TLS_LE: 1569 case BFD_RELOC_TILEGX_IMM16_X1_HW0_TLS_LE: 1570 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_TLS_LE: 1571 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_TLS_LE: 1572 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_TLS_LE: 1573 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_TLS_LE: 1574 case BFD_RELOC_TILEGX_TLS_GD_CALL: 1575 case BFD_RELOC_TILEGX_TLS_IE_LOAD: 1576 case BFD_RELOC_TILEGX_TLS_DTPMOD64: 1577 case BFD_RELOC_TILEGX_TLS_DTPOFF64: 1578 case BFD_RELOC_TILEGX_TLS_TPOFF64: 1579 case BFD_RELOC_TILEGX_TLS_DTPMOD32: 1580 case BFD_RELOC_TILEGX_TLS_DTPOFF32: 1581 case BFD_RELOC_TILEGX_TLS_TPOFF32: 1582 S_SET_THREAD_LOCAL (fixP->fx_addsy); 1583 break; 1584 1585 default: 1586 /* Do nothing */ 1587 break; 1588 } 1589 #endif 1590 return; 1591 } 1592 1593 /* Apply hw0, etc. */ 1594 special = O_illegal; 1595 switch (fixP->fx_r_type) 1596 { 1597 case BFD_RELOC_TILEGX_HW0: 1598 case BFD_RELOC_TILEGX_IMM16_X0_HW0: 1599 case BFD_RELOC_TILEGX_IMM16_X1_HW0: 1600 case BFD_RELOC_TILEGX_IMM16_X0_HW0_PCREL: 1601 case BFD_RELOC_TILEGX_IMM16_X1_HW0_PCREL: 1602 case BFD_RELOC_TILEGX_IMM16_X0_HW0_PLT_PCREL: 1603 case BFD_RELOC_TILEGX_IMM16_X1_HW0_PLT_PCREL: 1604 special = O_hw0; 1605 break; 1606 1607 case BFD_RELOC_TILEGX_HW0_LAST: 1608 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST: 1609 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST: 1610 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_PCREL: 1611 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_PCREL: 1612 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL: 1613 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL: 1614 special = O_hw0_last; 1615 break; 1616 1617 case BFD_RELOC_TILEGX_HW1: 1618 case BFD_RELOC_TILEGX_IMM16_X0_HW1: 1619 case BFD_RELOC_TILEGX_IMM16_X1_HW1: 1620 case BFD_RELOC_TILEGX_IMM16_X0_HW1_PCREL: 1621 case BFD_RELOC_TILEGX_IMM16_X1_HW1_PCREL: 1622 case BFD_RELOC_TILEGX_IMM16_X0_HW1_PLT_PCREL: 1623 case BFD_RELOC_TILEGX_IMM16_X1_HW1_PLT_PCREL: 1624 special = O_hw1; 1625 break; 1626 1627 case BFD_RELOC_TILEGX_HW1_LAST: 1628 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST: 1629 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST: 1630 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_PCREL: 1631 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_PCREL: 1632 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL: 1633 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL: 1634 special = O_hw1_last; 1635 break; 1636 1637 case BFD_RELOC_TILEGX_HW2: 1638 case BFD_RELOC_TILEGX_IMM16_X0_HW2: 1639 case BFD_RELOC_TILEGX_IMM16_X1_HW2: 1640 case BFD_RELOC_TILEGX_IMM16_X0_HW2_PCREL: 1641 case BFD_RELOC_TILEGX_IMM16_X1_HW2_PCREL: 1642 case BFD_RELOC_TILEGX_IMM16_X0_HW2_PLT_PCREL: 1643 case BFD_RELOC_TILEGX_IMM16_X1_HW2_PLT_PCREL: 1644 special = O_hw2; 1645 break; 1646 1647 case BFD_RELOC_TILEGX_HW2_LAST: 1648 case BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST: 1649 case BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST: 1650 case BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST_PCREL: 1651 case BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST_PCREL: 1652 case BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL: 1653 case BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL: 1654 special = O_hw2_last; 1655 break; 1656 1657 case BFD_RELOC_TILEGX_HW3: 1658 case BFD_RELOC_TILEGX_IMM16_X0_HW3: 1659 case BFD_RELOC_TILEGX_IMM16_X1_HW3: 1660 case BFD_RELOC_TILEGX_IMM16_X0_HW3_PCREL: 1661 case BFD_RELOC_TILEGX_IMM16_X1_HW3_PCREL: 1662 case BFD_RELOC_TILEGX_IMM16_X0_HW3_PLT_PCREL: 1663 case BFD_RELOC_TILEGX_IMM16_X1_HW3_PLT_PCREL: 1664 special = O_hw3; 1665 break; 1666 1667 default: 1668 /* Do nothing */ 1669 break; 1670 } 1671 1672 if (special != O_illegal) 1673 { 1674 *valP = value = apply_special_operator (special, value, 1675 fixP->fx_file, fixP->fx_line); 1676 } 1677 1678 p = fixP->fx_frag->fr_literal + fixP->fx_where; 1679 1680 operand = fixP->tc_fix_data; 1681 if (operand != NULL) 1682 { 1683 /* It's an instruction operand. */ 1684 tilegx_bundle_bits bits = 1685 insert_operand (0, operand, value, fixP->fx_file, fixP->fx_line); 1686 1687 /* Note that we might either be writing out bits for a bundle 1688 or a static network instruction, which are different sizes, so it's 1689 important to stop touching memory once we run out of bits. 1690 ORing in values is OK since we know the existing bits for 1691 this operand are zero. */ 1692 for (; bits != 0; bits >>= 8) 1693 *p++ |= (char)bits; 1694 } 1695 else 1696 { 1697 /* Some other kind of relocation. */ 1698 switch (fixP->fx_r_type) 1699 { 1700 case BFD_RELOC_8: 1701 case BFD_RELOC_8_PCREL: 1702 md_number_to_chars (p, value, 1); 1703 break; 1704 1705 case BFD_RELOC_16: 1706 case BFD_RELOC_16_PCREL: 1707 md_number_to_chars (p, value, 2); 1708 break; 1709 1710 case BFD_RELOC_32: 1711 case BFD_RELOC_32_PCREL: 1712 md_number_to_chars (p, value, 4); 1713 break; 1714 1715 case BFD_RELOC_64: 1716 case BFD_RELOC_64_PCREL: 1717 md_number_to_chars (p, value, 8); 1718 break; 1719 1720 default: 1721 /* Leave it for the linker. */ 1722 return; 1723 } 1724 } 1725 1726 fixP->fx_done = 1; 1727 } 1728 1729 1730 /* Generate the BFD reloc to be stuck in the object file from the 1731 fixup used internally in the assembler. */ 1732 1733 arelent * 1734 tc_gen_reloc (asection *sec ATTRIBUTE_UNUSED, fixS *fixp) 1735 { 1736 arelent *reloc; 1737 1738 reloc = XNEW (arelent); 1739 reloc->sym_ptr_ptr = XNEW (asymbol *); 1740 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); 1741 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; 1742 1743 /* Make sure none of our internal relocations make it this far. 1744 They'd better have been fully resolved by this point. */ 1745 gas_assert ((int) fixp->fx_r_type > 0); 1746 1747 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); 1748 if (reloc->howto == NULL) 1749 { 1750 as_bad_where (fixp->fx_file, fixp->fx_line, 1751 _("cannot represent `%s' relocation in object file"), 1752 bfd_get_reloc_code_name (fixp->fx_r_type)); 1753 return NULL; 1754 } 1755 1756 if (!fixp->fx_pcrel != !reloc->howto->pc_relative) 1757 { 1758 as_fatal (_("internal error? cannot generate `%s' relocation (%d, %d)"), 1759 bfd_get_reloc_code_name (fixp->fx_r_type), 1760 fixp->fx_pcrel, reloc->howto->pc_relative); 1761 } 1762 gas_assert (!fixp->fx_pcrel == !reloc->howto->pc_relative); 1763 1764 reloc->addend = fixp->fx_offset; 1765 1766 return reloc; 1767 } 1768 1769 1770 /* The location from which a PC relative jump should be calculated, 1771 given a PC relative reloc. */ 1772 1773 long 1774 md_pcrel_from (fixS *fixP) 1775 { 1776 return fixP->fx_frag->fr_address + fixP->fx_where; 1777 } 1778 1779 1780 /* Return 1 if it's OK to adjust a reloc by replacing the symbol with 1781 a section symbol plus some offset. */ 1782 int 1783 tilegx_fix_adjustable (fixS *fix) 1784 { 1785 /* Prevent all adjustments to global symbols */ 1786 if (S_IS_EXTERNAL (fix->fx_addsy) || S_IS_WEAK (fix->fx_addsy)) 1787 return 0; 1788 1789 return 1; 1790 } 1791 1792 1793 int 1794 tilegx_unrecognized_line (int ch) 1795 { 1796 switch (ch) 1797 { 1798 case '{': 1799 if (inside_bundle) 1800 { 1801 as_bad (_("Found '{' when already bundling.")); 1802 } 1803 else 1804 { 1805 inside_bundle = 1; 1806 current_bundle_index = 0; 1807 } 1808 return 1; 1809 1810 case '}': 1811 if (!inside_bundle) 1812 { 1813 as_bad (_("Found '}' when not bundling.")); 1814 } 1815 else 1816 { 1817 tilegx_flush_bundle (); 1818 } 1819 1820 /* Allow '{' to follow on the same line. We also allow ";;", but that 1821 happens automatically because ';' is an end of line marker. */ 1822 SKIP_WHITESPACE (); 1823 if (input_line_pointer[0] == '{') 1824 { 1825 input_line_pointer++; 1826 return tilegx_unrecognized_line ('{'); 1827 } 1828 1829 demand_empty_rest_of_line (); 1830 return 1; 1831 1832 default: 1833 break; 1834 } 1835 1836 /* Not a valid line. */ 1837 return 0; 1838 } 1839 1840 1841 /* This is called from HANDLE_ALIGN in write.c. Fill in the contents 1842 of an rs_align_code fragment. */ 1843 1844 void 1845 tilegx_handle_align (fragS *fragp) 1846 { 1847 addressT bytes, fix; 1848 char *p; 1849 1850 if (fragp->fr_type != rs_align_code) 1851 return; 1852 1853 bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix; 1854 p = fragp->fr_literal + fragp->fr_fix; 1855 fix = 0; 1856 1857 /* Determine the bits for NOP. */ 1858 const struct tilegx_opcode *nop_opcode = 1859 &tilegx_opcodes[TILEGX_OPC_NOP]; 1860 tilegx_bundle_bits nop = 1861 ( nop_opcode->fixed_bit_values[TILEGX_PIPELINE_X0] 1862 | nop_opcode->fixed_bit_values[TILEGX_PIPELINE_X1]); 1863 1864 if ((bytes & (TILEGX_BUNDLE_SIZE_IN_BYTES - 1)) != 0) 1865 { 1866 fix = bytes & (TILEGX_BUNDLE_SIZE_IN_BYTES - 1); 1867 memset (p, 0, fix); 1868 p += fix; 1869 bytes -= fix; 1870 } 1871 1872 number_to_chars_littleendian (p, nop, 8); 1873 fragp->fr_fix += fix; 1874 fragp->fr_var = TILEGX_BUNDLE_SIZE_IN_BYTES; 1875 } 1876 1877 /* Standard calling conventions leave the CFA at SP on entry. */ 1878 void 1879 tilegx_cfi_frame_initial_instructions (void) 1880 { 1881 cfi_add_CFA_def_cfa_register (54); 1882 } 1883 1884 int 1885 tc_tilegx_regname_to_dw2regnum (char *regname) 1886 { 1887 int i; 1888 for (i = 0; i < TILEGX_NUM_REGISTERS; i++) 1889 { 1890 if (!strcmp (regname, tilegx_register_names[i])) 1891 return i; 1892 } 1893 1894 return -1; 1895 } 1896
