1 /* tc-s390.c -- Assemble for the S390 2 Copyright (C) 2000-2016 Free Software Foundation, Inc. 3 Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS 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, or (at your option) 10 any later version. 11 12 GAS 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 GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #include "as.h" 23 #include "safe-ctype.h" 24 #include "subsegs.h" 25 #include "struc-symbol.h" 26 #include "dwarf2dbg.h" 27 #include "dw2gencfi.h" 28 29 #include "opcode/s390.h" 30 #include "elf/s390.h" 31 32 /* The default architecture. */ 33 #ifndef DEFAULT_ARCH 34 #define DEFAULT_ARCH "s390" 35 #endif 36 static const char *default_arch = DEFAULT_ARCH; 37 /* Either 32 or 64, selects file format. */ 38 static int s390_arch_size = 0; 39 40 /* If no -march option was given default to the highest available CPU. 41 Since with S/390 a newer CPU always supports everything from its 42 predecessors this will accept every valid asm input. */ 43 static unsigned int current_cpu = S390_OPCODE_MAXCPU - 1; 44 static unsigned int current_mode_mask = 0; 45 static unsigned int current_flags = 0; 46 47 /* Set to TRUE if the highgprs flag in the ELF header needs to be set 48 for the output file. */ 49 static bfd_boolean set_highgprs_p = FALSE; 50 51 /* Whether to use user friendly register names. Default is TRUE. */ 52 #ifndef TARGET_REG_NAMES_P 53 #define TARGET_REG_NAMES_P TRUE 54 #endif 55 56 static bfd_boolean reg_names_p = TARGET_REG_NAMES_P; 57 58 /* Set to TRUE if we want to warn about zero base/index registers. */ 59 static bfd_boolean warn_areg_zero = FALSE; 60 61 /* Generic assembler global variables which must be defined by all 62 targets. */ 63 64 const char comment_chars[] = "#"; 65 66 /* Characters which start a comment at the beginning of a line. */ 67 const char line_comment_chars[] = "#"; 68 69 /* Characters which may be used to separate multiple commands on a 70 single line. */ 71 const char line_separator_chars[] = ";"; 72 73 /* Characters which are used to indicate an exponent in a floating 74 point number. */ 75 const char EXP_CHARS[] = "eE"; 76 77 /* Characters which mean that a number is a floating point constant, 78 as in 0d1.0. */ 79 const char FLT_CHARS[] = "dD"; 80 81 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */ 82 int s390_cie_data_alignment; 83 84 /* The target specific pseudo-ops which we support. */ 85 86 /* Define the prototypes for the pseudo-ops */ 87 static void s390_byte (int); 88 static void s390_elf_cons (int); 89 static void s390_bss (int); 90 static void s390_insn (int); 91 static void s390_literals (int); 92 static void s390_machine (int); 93 static void s390_machinemode (int); 94 95 const pseudo_typeS md_pseudo_table[] = 96 { 97 { "align", s_align_bytes, 0 }, 98 /* Pseudo-ops which must be defined. */ 99 { "bss", s390_bss, 0 }, 100 { "insn", s390_insn, 0 }, 101 /* Pseudo-ops which must be overridden. */ 102 { "byte", s390_byte, 0 }, 103 { "short", s390_elf_cons, 2 }, 104 { "long", s390_elf_cons, 4 }, 105 { "quad", s390_elf_cons, 8 }, 106 { "ltorg", s390_literals, 0 }, 107 { "string", stringer, 8 + 1 }, 108 { "machine", s390_machine, 0 }, 109 { "machinemode", s390_machinemode, 0 }, 110 { NULL, NULL, 0 } 111 }; 112 113 /* Given NAME, find the register number associated with that name, return 114 the integer value associated with the given name or -1 on failure. */ 115 116 static int 117 reg_name_search (const char *name) 118 { 119 int val = -1; 120 121 if (strcasecmp (name, "lit") == 0) 122 return 13; 123 124 if (strcasecmp (name, "sp") == 0) 125 return 15; 126 127 if (name[0] != 'a' && name[0] != 'c' && name[0] != 'f' 128 && name[0] != 'r' && name[0] != 'v') 129 return -1; 130 131 if (ISDIGIT (name[1])) 132 { 133 val = name[1] - '0'; 134 if (ISDIGIT (name[2])) 135 val = val * 10 + name[2] - '0'; 136 } 137 138 if ((name[0] != 'v' && val > 15) || val > 31) 139 val = -1; 140 141 return val; 142 } 143 144 145 /* 146 * Summary of register_name(). 147 * 148 * in: Input_line_pointer points to 1st char of operand. 149 * 150 * out: A expressionS. 151 * The operand may have been a register: in this case, X_op == O_register, 152 * X_add_number is set to the register number, and truth is returned. 153 * Input_line_pointer->(next non-blank) char after operand, or is in its 154 * original state. 155 */ 156 157 static bfd_boolean 158 register_name (expressionS *expressionP) 159 { 160 int reg_number; 161 char *name; 162 char *start; 163 char c; 164 165 /* Find the spelling of the operand. */ 166 start = name = input_line_pointer; 167 if (name[0] == '%' && ISALPHA (name[1])) 168 name = ++input_line_pointer; 169 else 170 return FALSE; 171 172 c = get_symbol_name (&name); 173 reg_number = reg_name_search (name); 174 175 /* Put back the delimiting char. */ 176 (void) restore_line_pointer (c); 177 178 /* Look to see if it's in the register table. */ 179 if (reg_number >= 0) 180 { 181 expressionP->X_op = O_register; 182 expressionP->X_add_number = reg_number; 183 184 /* Make the rest nice. */ 185 expressionP->X_add_symbol = NULL; 186 expressionP->X_op_symbol = NULL; 187 return TRUE; 188 } 189 190 /* Reset the line as if we had not done anything. */ 191 input_line_pointer = start; 192 return FALSE; 193 } 194 195 /* Local variables. */ 196 197 /* Opformat hash table. */ 198 static struct hash_control *s390_opformat_hash; 199 200 /* Opcode hash table. */ 201 static struct hash_control *s390_opcode_hash = NULL; 202 203 /* Flags to set in the elf header */ 204 static flagword s390_flags = 0; 205 206 symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ 207 208 #ifndef WORKING_DOT_WORD 209 int md_short_jump_size = 4; 210 int md_long_jump_size = 4; 211 #endif 212 213 const char *md_shortopts = "A:m:kVQ:"; 214 struct option md_longopts[] = { 215 {NULL, no_argument, NULL, 0} 216 }; 217 size_t md_longopts_size = sizeof (md_longopts); 218 219 /* Initialize the default opcode arch and word size from the default 220 architecture name if not specified by an option. */ 221 static void 222 init_default_arch (void) 223 { 224 if (strcmp (default_arch, "s390") == 0) 225 { 226 if (s390_arch_size == 0) 227 s390_arch_size = 32; 228 } 229 else if (strcmp (default_arch, "s390x") == 0) 230 { 231 if (s390_arch_size == 0) 232 s390_arch_size = 64; 233 } 234 else 235 as_fatal (_("Invalid default architecture, broken assembler.")); 236 237 if (current_mode_mask == 0) 238 { 239 /* Default to z/Architecture mode if the CPU supports it. */ 240 if (current_cpu < S390_OPCODE_Z900) 241 current_mode_mask = 1 << S390_OPCODE_ESA; 242 else 243 current_mode_mask = 1 << S390_OPCODE_ZARCH; 244 } 245 } 246 247 /* Called by TARGET_FORMAT. */ 248 const char * 249 s390_target_format (void) 250 { 251 /* We don't get a chance to initialize anything before we're called, 252 so handle that now. */ 253 init_default_arch (); 254 255 return s390_arch_size == 64 ? "elf64-s390" : "elf32-s390"; 256 } 257 258 /* Map a cpu string ARG as given with -march= or .machine to the respective 259 enum s390_opcode_cpu_val value. If ALLOW_EXTENSIONS is TRUE, the cpu name 260 can be followed by a list of cpu facility flags each beginning with the 261 character '+'. The active cpu flags are returned through *RET_FLAGS. 262 In case of an error, S390_OPCODE_MAXCPU is returned. */ 263 264 static unsigned int 265 s390_parse_cpu (const char * arg, 266 unsigned int * ret_flags, 267 bfd_boolean allow_extensions) 268 { 269 static struct 270 { 271 const char * name; 272 unsigned int len; 273 unsigned int flags; 274 } cpu_table[S390_OPCODE_MAXCPU] = 275 { 276 { STRING_COMMA_LEN ("g5"), 0 }, 277 { STRING_COMMA_LEN ("g6"), 0 }, 278 { STRING_COMMA_LEN ("z900"), 0 }, 279 { STRING_COMMA_LEN ("z990"), 0 }, 280 { STRING_COMMA_LEN ("z9-109"), 0 }, 281 { STRING_COMMA_LEN ("z9-ec"), 0 }, 282 { STRING_COMMA_LEN ("z10"), 0 }, 283 { STRING_COMMA_LEN ("z196"), 0 }, 284 { STRING_COMMA_LEN ("zEC12"), S390_INSTR_FLAG_HTM }, 285 { STRING_COMMA_LEN ("z13"), S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX } 286 }; 287 static struct 288 { 289 const char * name; 290 unsigned int mask; 291 bfd_boolean on; 292 } cpu_flags[] = 293 { 294 { "htm", S390_INSTR_FLAG_HTM, TRUE }, 295 { "nohtm", S390_INSTR_FLAG_HTM, FALSE }, 296 { "vx", S390_INSTR_FLAG_VX, TRUE }, 297 { "novx", S390_INSTR_FLAG_VX, FALSE } 298 }; 299 unsigned int icpu; 300 char *ilp_bak; 301 302 icpu = S390_OPCODE_MAXCPU; 303 if (strncmp (arg, "all", 3) == 0 && (arg[3] == 0 || arg[3] == '+')) 304 { 305 icpu = S390_OPCODE_MAXCPU - 1; 306 arg += 3; 307 } 308 else 309 { 310 for (icpu = 0; icpu < S390_OPCODE_MAXCPU; icpu++) 311 { 312 unsigned int l; 313 314 l = cpu_table[icpu].len; 315 if (strncmp (arg, cpu_table[icpu].name, l) == 0 316 && (arg[l] == 0 || arg[l] == '+')) 317 { 318 arg += l; 319 break; 320 } 321 } 322 } 323 324 ilp_bak = input_line_pointer; 325 if (icpu != S390_OPCODE_MAXCPU) 326 { 327 input_line_pointer = (char *) arg; 328 *ret_flags = (cpu_table[icpu].flags & S390_INSTR_FLAG_FACILITY_MASK); 329 330 while (*input_line_pointer == '+' && allow_extensions) 331 { 332 unsigned int iflag; 333 char *sym; 334 char c; 335 336 input_line_pointer++; 337 c = get_symbol_name (&sym); 338 for (iflag = 0; iflag < ARRAY_SIZE (cpu_flags); iflag++) 339 { 340 if (strcmp (sym, cpu_flags[iflag].name) == 0) 341 { 342 if (cpu_flags[iflag].on) 343 *ret_flags |= cpu_flags[iflag].mask; 344 else 345 *ret_flags &= ~cpu_flags[iflag].mask; 346 break; 347 } 348 } 349 if (iflag == ARRAY_SIZE (cpu_flags)) 350 as_bad (_("no such machine extension `%s'"), sym - 1); 351 *input_line_pointer = c; 352 if (iflag == ARRAY_SIZE (cpu_flags)) 353 break; 354 } 355 } 356 357 SKIP_WHITESPACE (); 358 359 if (*input_line_pointer != 0 && *input_line_pointer != '\n') 360 { 361 as_bad (_("junk at end of machine string, first unrecognized character" 362 " is `%c'"), *input_line_pointer); 363 icpu = S390_OPCODE_MAXCPU; 364 } 365 input_line_pointer = ilp_bak; 366 367 return icpu; 368 } 369 370 int 371 md_parse_option (int c, const char *arg) 372 { 373 switch (c) 374 { 375 /* -k: Ignore for FreeBSD compatibility. */ 376 case 'k': 377 break; 378 case 'm': 379 if (arg != NULL && strcmp (arg, "regnames") == 0) 380 reg_names_p = TRUE; 381 382 else if (arg != NULL && strcmp (arg, "no-regnames") == 0) 383 reg_names_p = FALSE; 384 385 else if (arg != NULL && strcmp (arg, "warn-areg-zero") == 0) 386 warn_areg_zero = TRUE; 387 388 else if (arg != NULL && strcmp (arg, "31") == 0) 389 s390_arch_size = 32; 390 391 else if (arg != NULL && strcmp (arg, "64") == 0) 392 s390_arch_size = 64; 393 394 else if (arg != NULL && strcmp (arg, "esa") == 0) 395 current_mode_mask = 1 << S390_OPCODE_ESA; 396 397 else if (arg != NULL && strcmp (arg, "zarch") == 0) 398 { 399 if (s390_arch_size == 32) 400 set_highgprs_p = TRUE; 401 current_mode_mask = 1 << S390_OPCODE_ZARCH; 402 } 403 404 else if (arg != NULL && strncmp (arg, "arch=", 5) == 0) 405 { 406 current_cpu = s390_parse_cpu (arg + 5, ¤t_flags, FALSE); 407 if (current_cpu == S390_OPCODE_MAXCPU) 408 { 409 as_bad (_("invalid switch -m%s"), arg); 410 return 0; 411 } 412 } 413 414 else 415 { 416 as_bad (_("invalid switch -m%s"), arg); 417 return 0; 418 } 419 break; 420 421 case 'A': 422 /* Option -A is deprecated. Still available for compatibility. */ 423 if (arg != NULL && strcmp (arg, "esa") == 0) 424 current_cpu = S390_OPCODE_G5; 425 else if (arg != NULL && strcmp (arg, "esame") == 0) 426 current_cpu = S390_OPCODE_Z900; 427 else 428 as_bad (_("invalid architecture -A%s"), arg); 429 break; 430 431 /* -V: SVR4 argument to print version ID. */ 432 case 'V': 433 print_version_id (); 434 break; 435 436 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section 437 should be emitted or not. FIXME: Not implemented. */ 438 case 'Q': 439 break; 440 441 default: 442 return 0; 443 } 444 445 return 1; 446 } 447 448 void 449 md_show_usage (FILE *stream) 450 { 451 fprintf (stream, _("\ 452 S390 options:\n\ 453 -mregnames Allow symbolic names for registers\n\ 454 -mwarn-areg-zero Warn about zero base/index registers\n\ 455 -mno-regnames Do not allow symbolic names for registers\n\ 456 -m31 Set file format to 31 bit format\n\ 457 -m64 Set file format to 64 bit format\n")); 458 fprintf (stream, _("\ 459 -V print assembler version number\n\ 460 -Qy, -Qn ignored\n")); 461 } 462 463 /* Generate the hash table mapping mnemonics to struct s390_opcode. 464 This table is built at startup and whenever the CPU level is 465 changed using .machine. */ 466 467 static void 468 s390_setup_opcodes (void) 469 { 470 const struct s390_opcode *op; 471 const struct s390_opcode *op_end; 472 bfd_boolean dup_insn = FALSE; 473 const char *retval; 474 475 if (s390_opcode_hash != NULL) 476 hash_die (s390_opcode_hash); 477 478 /* Insert the opcodes into a hash table. */ 479 s390_opcode_hash = hash_new (); 480 481 op_end = s390_opcodes + s390_num_opcodes; 482 for (op = s390_opcodes; op < op_end; op++) 483 { 484 int use_opcode; 485 486 while (op < op_end - 1 && strcmp(op->name, op[1].name) == 0) 487 { 488 if (op->min_cpu <= current_cpu && (op->modes & current_mode_mask)) 489 break; 490 op++; 491 } 492 493 if ((op->modes & current_mode_mask) == 0) 494 use_opcode = 0; 495 else if ((op->flags & S390_INSTR_FLAG_FACILITY_MASK) == 0) 496 { 497 /* Opcodes that do not belong to a specific facility are enabled if 498 present in the selected cpu. */ 499 use_opcode = (op->min_cpu <= current_cpu); 500 } 501 else 502 { 503 unsigned int f; 504 505 /* Opcodes of a specific facility are enabled if the facility is 506 enabled. Note: only some facilities are represented as flags. */ 507 f = (op->flags & S390_INSTR_FLAG_FACILITY_MASK); 508 use_opcode = ((f & current_flags) == f); 509 } 510 if (use_opcode) 511 { 512 retval = hash_insert (s390_opcode_hash, op->name, (void *) op); 513 if (retval != (const char *) NULL) 514 { 515 as_bad (_("Internal assembler error for instruction %s"), 516 op->name); 517 dup_insn = TRUE; 518 } 519 } 520 521 while (op < op_end - 1 && strcmp (op->name, op[1].name) == 0) 522 op++; 523 } 524 525 if (dup_insn) 526 abort (); 527 } 528 529 /* This function is called when the assembler starts up. It is called 530 after the options have been parsed and the output file has been 531 opened. */ 532 533 void 534 md_begin (void) 535 { 536 const struct s390_opcode *op; 537 const struct s390_opcode *op_end; 538 const char *retval; 539 540 /* Give a warning if the combination -m64-bit and -Aesa is used. */ 541 if (s390_arch_size == 64 && current_cpu < S390_OPCODE_Z900) 542 as_warn (_("The 64 bit file format is used without esame instructions.")); 543 544 s390_cie_data_alignment = -s390_arch_size / 8; 545 546 /* Set the ELF flags if desired. */ 547 if (s390_flags) 548 bfd_set_private_flags (stdoutput, s390_flags); 549 550 /* Insert the opcode formats into a hash table. */ 551 s390_opformat_hash = hash_new (); 552 553 op_end = s390_opformats + s390_num_opformats; 554 for (op = s390_opformats; op < op_end; op++) 555 { 556 retval = hash_insert (s390_opformat_hash, op->name, (void *) op); 557 if (retval != (const char *) NULL) 558 as_bad (_("Internal assembler error for instruction format %s"), 559 op->name); 560 } 561 562 s390_setup_opcodes (); 563 564 record_alignment (text_section, 2); 565 record_alignment (data_section, 2); 566 record_alignment (bss_section, 2); 567 } 568 569 /* Called after all assembly has been done. */ 570 void 571 s390_md_end (void) 572 { 573 if (s390_arch_size == 64) 574 bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_64); 575 else 576 bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_31); 577 } 578 579 /* Insert an operand value into an instruction. */ 580 581 static void 582 s390_insert_operand (unsigned char *insn, 583 const struct s390_operand *operand, 584 offsetT val, 585 const char *file, 586 unsigned int line) 587 { 588 addressT uval; 589 int offset; 590 591 if (operand->flags & (S390_OPERAND_SIGNED|S390_OPERAND_PCREL)) 592 { 593 offsetT min, max; 594 595 max = ((offsetT) 1 << (operand->bits - 1)) - 1; 596 min = - ((offsetT) 1 << (operand->bits - 1)); 597 /* Halve PCREL operands. */ 598 if (operand->flags & S390_OPERAND_PCREL) 599 val >>= 1; 600 /* Check for underflow / overflow. */ 601 if (val < min || val > max) 602 { 603 const char *err = 604 _("operand out of range (%s not between %ld and %ld)"); 605 char buf[100]; 606 607 if (operand->flags & S390_OPERAND_PCREL) 608 { 609 val <<= 1; 610 min <<= 1; 611 max <<= 1; 612 } 613 sprint_value (buf, val); 614 if (file == (char *) NULL) 615 as_bad (err, buf, (int) min, (int) max); 616 else 617 as_bad_where (file, line, err, buf, (int) min, (int) max); 618 return; 619 } 620 /* val is ok, now restrict it to operand->bits bits. */ 621 uval = (addressT) val & ((((addressT) 1 << (operand->bits-1)) << 1) - 1); 622 /* val is restrict, now check for special case. */ 623 if (operand->bits == 20 && operand->shift == 20) 624 uval = (uval >> 12) | ((uval & 0xfff) << 8); 625 } 626 else 627 { 628 addressT min, max; 629 630 max = (((addressT) 1 << (operand->bits - 1)) << 1) - 1; 631 min = (offsetT) 0; 632 uval = (addressT) val; 633 634 /* Vector register operands have an additional bit in the RXB 635 field. */ 636 if (operand->flags & S390_OPERAND_VR) 637 max = (max << 1) | 1; 638 639 /* Length x in an instructions has real length x+1. */ 640 if (operand->flags & S390_OPERAND_LENGTH) 641 uval--; 642 /* Check for underflow / overflow. */ 643 if (uval < min || uval > max) 644 { 645 if (operand->flags & S390_OPERAND_LENGTH) 646 { 647 uval++; 648 min++; 649 max++; 650 } 651 652 as_bad_value_out_of_range (_("operand"), uval, (offsetT) min, (offsetT) max, file, line); 653 654 return; 655 } 656 } 657 658 if (operand->flags & S390_OPERAND_VR) 659 { 660 /* Insert the extra bit into the RXB field. */ 661 switch (operand->shift) 662 { 663 case 8: 664 insn[4] |= (uval & 0x10) >> 1; 665 break; 666 case 12: 667 insn[4] |= (uval & 0x10) >> 2; 668 break; 669 case 16: 670 insn[4] |= (uval & 0x10) >> 3; 671 break; 672 case 32: 673 insn[4] |= (uval & 0x10) >> 4; 674 break; 675 } 676 uval &= 0xf; 677 } 678 679 if (operand->flags & S390_OPERAND_OR1) 680 uval |= 1; 681 if (operand->flags & S390_OPERAND_OR2) 682 uval |= 2; 683 if (operand->flags & S390_OPERAND_OR8) 684 uval |= 8; 685 686 /* Duplicate the operand at bit pos 12 to 16. */ 687 if (operand->flags & S390_OPERAND_CP16) 688 { 689 /* Copy VR operand at bit pos 12 to bit pos 16. */ 690 insn[2] |= uval << 4; 691 /* Copy the flag in the RXB field. */ 692 insn[4] |= (insn[4] & 4) >> 1; 693 } 694 695 /* Insert fragments of the operand byte for byte. */ 696 offset = operand->shift + operand->bits; 697 uval <<= (-offset) & 7; 698 insn += (offset - 1) / 8; 699 while (uval != 0) 700 { 701 *insn-- |= uval; 702 uval >>= 8; 703 } 704 } 705 706 struct map_tls 707 { 708 const char *string; 709 int length; 710 bfd_reloc_code_real_type reloc; 711 }; 712 713 /* Parse tls marker and return the desired relocation. */ 714 static bfd_reloc_code_real_type 715 s390_tls_suffix (char **str_p, expressionS *exp_p) 716 { 717 static struct map_tls mapping[] = 718 { 719 { "tls_load", 8, BFD_RELOC_390_TLS_LOAD }, 720 { "tls_gdcall", 10, BFD_RELOC_390_TLS_GDCALL }, 721 { "tls_ldcall", 10, BFD_RELOC_390_TLS_LDCALL }, 722 { NULL, 0, BFD_RELOC_UNUSED } 723 }; 724 struct map_tls *ptr; 725 char *orig_line; 726 char *str; 727 char *ident; 728 int len; 729 730 str = *str_p; 731 if (*str++ != ':') 732 return BFD_RELOC_UNUSED; 733 734 ident = str; 735 while (ISIDNUM (*str)) 736 str++; 737 len = str - ident; 738 if (*str++ != ':') 739 return BFD_RELOC_UNUSED; 740 741 orig_line = input_line_pointer; 742 input_line_pointer = str; 743 expression (exp_p); 744 str = input_line_pointer; 745 if (&input_line_pointer != str_p) 746 input_line_pointer = orig_line; 747 748 if (exp_p->X_op != O_symbol) 749 return BFD_RELOC_UNUSED; 750 751 for (ptr = &mapping[0]; ptr->length > 0; ptr++) 752 if (len == ptr->length 753 && strncasecmp (ident, ptr->string, ptr->length) == 0) 754 { 755 /* Found a matching tls suffix. */ 756 *str_p = str; 757 return ptr->reloc; 758 } 759 return BFD_RELOC_UNUSED; 760 } 761 762 /* Structure used to hold suffixes. */ 763 typedef enum 764 { 765 ELF_SUFFIX_NONE = 0, 766 ELF_SUFFIX_GOT, 767 ELF_SUFFIX_PLT, 768 ELF_SUFFIX_GOTENT, 769 ELF_SUFFIX_GOTOFF, 770 ELF_SUFFIX_GOTPLT, 771 ELF_SUFFIX_PLTOFF, 772 ELF_SUFFIX_TLS_GD, 773 ELF_SUFFIX_TLS_GOTIE, 774 ELF_SUFFIX_TLS_IE, 775 ELF_SUFFIX_TLS_LDM, 776 ELF_SUFFIX_TLS_LDO, 777 ELF_SUFFIX_TLS_LE 778 } 779 elf_suffix_type; 780 781 struct map_bfd 782 { 783 const char *string; 784 int length; 785 elf_suffix_type suffix; 786 }; 787 788 789 /* Parse @got/@plt/@gotoff. and return the desired relocation. */ 790 static elf_suffix_type 791 s390_elf_suffix (char **str_p, expressionS *exp_p) 792 { 793 static struct map_bfd mapping[] = 794 { 795 { "got", 3, ELF_SUFFIX_GOT }, 796 { "got12", 5, ELF_SUFFIX_GOT }, 797 { "plt", 3, ELF_SUFFIX_PLT }, 798 { "gotent", 6, ELF_SUFFIX_GOTENT }, 799 { "gotoff", 6, ELF_SUFFIX_GOTOFF }, 800 { "gotplt", 6, ELF_SUFFIX_GOTPLT }, 801 { "pltoff", 6, ELF_SUFFIX_PLTOFF }, 802 { "tlsgd", 5, ELF_SUFFIX_TLS_GD }, 803 { "gotntpoff", 9, ELF_SUFFIX_TLS_GOTIE }, 804 { "indntpoff", 9, ELF_SUFFIX_TLS_IE }, 805 { "tlsldm", 6, ELF_SUFFIX_TLS_LDM }, 806 { "dtpoff", 6, ELF_SUFFIX_TLS_LDO }, 807 { "ntpoff", 6, ELF_SUFFIX_TLS_LE }, 808 { NULL, 0, ELF_SUFFIX_NONE } 809 }; 810 811 struct map_bfd *ptr; 812 char *str = *str_p; 813 char *ident; 814 int len; 815 816 if (*str++ != '@') 817 return ELF_SUFFIX_NONE; 818 819 ident = str; 820 while (ISALNUM (*str)) 821 str++; 822 len = str - ident; 823 824 for (ptr = &mapping[0]; ptr->length > 0; ptr++) 825 if (len == ptr->length 826 && strncasecmp (ident, ptr->string, ptr->length) == 0) 827 { 828 if (exp_p->X_add_number != 0) 829 as_warn (_("identifier+constant@%s means identifier@%s+constant"), 830 ptr->string, ptr->string); 831 /* Now check for identifier@suffix+constant. */ 832 if (*str == '-' || *str == '+') 833 { 834 char *orig_line = input_line_pointer; 835 expressionS new_exp; 836 837 input_line_pointer = str; 838 expression (&new_exp); 839 840 switch (new_exp.X_op) 841 { 842 case O_constant: /* X_add_number (a constant expression). */ 843 exp_p->X_add_number += new_exp.X_add_number; 844 str = input_line_pointer; 845 break; 846 case O_symbol: /* X_add_symbol + X_add_number. */ 847 /* this case is used for e.g. xyz@PLT+.Label. */ 848 exp_p->X_add_number += new_exp.X_add_number; 849 exp_p->X_op_symbol = new_exp.X_add_symbol; 850 exp_p->X_op = O_add; 851 str = input_line_pointer; 852 break; 853 case O_uminus: /* (- X_add_symbol) + X_add_number. */ 854 /* this case is used for e.g. xyz@PLT-.Label. */ 855 exp_p->X_add_number += new_exp.X_add_number; 856 exp_p->X_op_symbol = new_exp.X_add_symbol; 857 exp_p->X_op = O_subtract; 858 str = input_line_pointer; 859 break; 860 default: 861 break; 862 } 863 864 /* If s390_elf_suffix has not been called with 865 &input_line_pointer as first parameter, we have 866 clobbered the input_line_pointer. We have to 867 undo that. */ 868 if (&input_line_pointer != str_p) 869 input_line_pointer = orig_line; 870 } 871 *str_p = str; 872 return ptr->suffix; 873 } 874 875 return BFD_RELOC_UNUSED; 876 } 877 878 /* Structure used to hold a literal pool entry. */ 879 struct s390_lpe 880 { 881 struct s390_lpe *next; 882 expressionS ex; 883 FLONUM_TYPE floatnum; /* used if X_op == O_big && X_add_number <= 0 */ 884 LITTLENUM_TYPE bignum[4]; /* used if X_op == O_big && X_add_number > 0 */ 885 int nbytes; 886 bfd_reloc_code_real_type reloc; 887 symbolS *sym; 888 }; 889 890 static struct s390_lpe *lpe_free_list = NULL; 891 static struct s390_lpe *lpe_list = NULL; 892 static struct s390_lpe *lpe_list_tail = NULL; 893 static symbolS *lp_sym = NULL; 894 static int lp_count = 0; 895 static int lpe_count = 0; 896 897 static int 898 s390_exp_compare (expressionS *exp1, expressionS *exp2) 899 { 900 if (exp1->X_op != exp2->X_op) 901 return 0; 902 903 switch (exp1->X_op) 904 { 905 case O_constant: /* X_add_number must be equal. */ 906 case O_register: 907 return exp1->X_add_number == exp2->X_add_number; 908 909 case O_big: 910 as_bad (_("Can't handle O_big in s390_exp_compare")); 911 912 case O_symbol: /* X_add_symbol & X_add_number must be equal. */ 913 case O_symbol_rva: 914 case O_uminus: 915 case O_bit_not: 916 case O_logical_not: 917 return (exp1->X_add_symbol == exp2->X_add_symbol) 918 && (exp1->X_add_number == exp2->X_add_number); 919 920 case O_multiply: /* X_add_symbol,X_op_symbol&X_add_number must be equal. */ 921 case O_divide: 922 case O_modulus: 923 case O_left_shift: 924 case O_right_shift: 925 case O_bit_inclusive_or: 926 case O_bit_or_not: 927 case O_bit_exclusive_or: 928 case O_bit_and: 929 case O_add: 930 case O_subtract: 931 case O_eq: 932 case O_ne: 933 case O_lt: 934 case O_le: 935 case O_ge: 936 case O_gt: 937 case O_logical_and: 938 case O_logical_or: 939 return (exp1->X_add_symbol == exp2->X_add_symbol) 940 && (exp1->X_op_symbol == exp2->X_op_symbol) 941 && (exp1->X_add_number == exp2->X_add_number); 942 default: 943 return 0; 944 } 945 } 946 947 /* Test for @lit and if its present make an entry in the literal pool and 948 modify the current expression to be an offset into the literal pool. */ 949 static elf_suffix_type 950 s390_lit_suffix (char **str_p, expressionS *exp_p, elf_suffix_type suffix) 951 { 952 bfd_reloc_code_real_type reloc; 953 char tmp_name[64]; 954 char *str = *str_p; 955 char *ident; 956 struct s390_lpe *lpe; 957 int nbytes, len; 958 959 if (*str++ != ':') 960 return suffix; /* No modification. */ 961 962 /* We look for a suffix of the form "@lit1", "@lit2", "@lit4" or "@lit8". */ 963 ident = str; 964 while (ISALNUM (*str)) 965 str++; 966 len = str - ident; 967 if (len != 4 || strncasecmp (ident, "lit", 3) != 0 968 || (ident[3]!='1' && ident[3]!='2' && ident[3]!='4' && ident[3]!='8')) 969 return suffix; /* no modification */ 970 nbytes = ident[3] - '0'; 971 972 reloc = BFD_RELOC_UNUSED; 973 if (suffix == ELF_SUFFIX_GOT) 974 { 975 if (nbytes == 2) 976 reloc = BFD_RELOC_390_GOT16; 977 else if (nbytes == 4) 978 reloc = BFD_RELOC_32_GOT_PCREL; 979 else if (nbytes == 8) 980 reloc = BFD_RELOC_390_GOT64; 981 } 982 else if (suffix == ELF_SUFFIX_PLT) 983 { 984 if (nbytes == 4) 985 reloc = BFD_RELOC_390_PLT32; 986 else if (nbytes == 8) 987 reloc = BFD_RELOC_390_PLT64; 988 } 989 990 if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) 991 as_bad (_("Invalid suffix for literal pool entry")); 992 993 /* Search the pool if the new entry is a duplicate. */ 994 if (exp_p->X_op == O_big) 995 { 996 /* Special processing for big numbers. */ 997 for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) 998 { 999 if (lpe->ex.X_op == O_big) 1000 { 1001 if (exp_p->X_add_number <= 0 && lpe->ex.X_add_number <= 0) 1002 { 1003 if (memcmp (&generic_floating_point_number, &lpe->floatnum, 1004 sizeof (FLONUM_TYPE)) == 0) 1005 break; 1006 } 1007 else if (exp_p->X_add_number == lpe->ex.X_add_number) 1008 { 1009 if (memcmp (generic_bignum, lpe->bignum, 1010 sizeof (LITTLENUM_TYPE)*exp_p->X_add_number) == 0) 1011 break; 1012 } 1013 } 1014 } 1015 } 1016 else 1017 { 1018 /* Processing for 'normal' data types. */ 1019 for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) 1020 if (lpe->nbytes == nbytes && lpe->reloc == reloc 1021 && s390_exp_compare (exp_p, &lpe->ex) != 0) 1022 break; 1023 } 1024 1025 if (lpe == NULL) 1026 { 1027 /* A new literal. */ 1028 if (lpe_free_list != NULL) 1029 { 1030 lpe = lpe_free_list; 1031 lpe_free_list = lpe_free_list->next; 1032 } 1033 else 1034 { 1035 lpe = XNEW (struct s390_lpe); 1036 } 1037 1038 lpe->ex = *exp_p; 1039 1040 if (exp_p->X_op == O_big) 1041 { 1042 if (exp_p->X_add_number <= 0) 1043 lpe->floatnum = generic_floating_point_number; 1044 else if (exp_p->X_add_number <= 4) 1045 memcpy (lpe->bignum, generic_bignum, 1046 exp_p->X_add_number * sizeof (LITTLENUM_TYPE)); 1047 else 1048 as_bad (_("Big number is too big")); 1049 } 1050 1051 lpe->nbytes = nbytes; 1052 lpe->reloc = reloc; 1053 /* Literal pool name defined ? */ 1054 if (lp_sym == NULL) 1055 { 1056 sprintf (tmp_name, ".L\001%i", lp_count); 1057 lp_sym = symbol_make (tmp_name); 1058 } 1059 1060 /* Make name for literal pool entry. */ 1061 sprintf (tmp_name, ".L\001%i\002%i", lp_count, lpe_count); 1062 lpe_count++; 1063 lpe->sym = symbol_make (tmp_name); 1064 1065 /* Add to literal pool list. */ 1066 lpe->next = NULL; 1067 if (lpe_list_tail != NULL) 1068 { 1069 lpe_list_tail->next = lpe; 1070 lpe_list_tail = lpe; 1071 } 1072 else 1073 lpe_list = lpe_list_tail = lpe; 1074 } 1075 1076 /* Now change exp_p to the offset into the literal pool. 1077 Thats the expression: .L^Ax^By-.L^Ax */ 1078 exp_p->X_add_symbol = lpe->sym; 1079 exp_p->X_op_symbol = lp_sym; 1080 exp_p->X_op = O_subtract; 1081 exp_p->X_add_number = 0; 1082 1083 *str_p = str; 1084 1085 /* We change the suffix type to ELF_SUFFIX_NONE, because 1086 the difference of two local labels is just a number. */ 1087 return ELF_SUFFIX_NONE; 1088 } 1089 1090 /* Like normal .long/.short/.word, except support @got, etc. 1091 clobbers input_line_pointer, checks end-of-line. */ 1092 static void 1093 s390_elf_cons (int nbytes /* 1=.byte, 2=.word, 4=.long */) 1094 { 1095 expressionS exp; 1096 elf_suffix_type suffix; 1097 1098 if (is_it_end_of_statement ()) 1099 { 1100 demand_empty_rest_of_line (); 1101 return; 1102 } 1103 1104 do 1105 { 1106 expression (&exp); 1107 1108 if (exp.X_op == O_symbol 1109 && *input_line_pointer == '@' 1110 && (suffix = s390_elf_suffix (&input_line_pointer, &exp)) != ELF_SUFFIX_NONE) 1111 { 1112 bfd_reloc_code_real_type reloc; 1113 reloc_howto_type *reloc_howto; 1114 int size; 1115 char *where; 1116 1117 if (nbytes == 2) 1118 { 1119 static bfd_reloc_code_real_type tab2[] = 1120 { 1121 BFD_RELOC_UNUSED, /* ELF_SUFFIX_NONE */ 1122 BFD_RELOC_390_GOT16, /* ELF_SUFFIX_GOT */ 1123 BFD_RELOC_UNUSED, /* ELF_SUFFIX_PLT */ 1124 BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTENT */ 1125 BFD_RELOC_16_GOTOFF, /* ELF_SUFFIX_GOTOFF */ 1126 BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTPLT */ 1127 BFD_RELOC_390_PLTOFF16, /* ELF_SUFFIX_PLTOFF */ 1128 BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_GD */ 1129 BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_GOTIE */ 1130 BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_IE */ 1131 BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_LDM */ 1132 BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_LDO */ 1133 BFD_RELOC_UNUSED /* ELF_SUFFIX_TLS_LE */ 1134 }; 1135 reloc = tab2[suffix]; 1136 } 1137 else if (nbytes == 4) 1138 { 1139 static bfd_reloc_code_real_type tab4[] = 1140 { 1141 BFD_RELOC_UNUSED, /* ELF_SUFFIX_NONE */ 1142 BFD_RELOC_32_GOT_PCREL, /* ELF_SUFFIX_GOT */ 1143 BFD_RELOC_390_PLT32, /* ELF_SUFFIX_PLT */ 1144 BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTENT */ 1145 BFD_RELOC_32_GOTOFF, /* ELF_SUFFIX_GOTOFF */ 1146 BFD_RELOC_390_GOTPLT32, /* ELF_SUFFIX_GOTPLT */ 1147 BFD_RELOC_390_PLTOFF32, /* ELF_SUFFIX_PLTOFF */ 1148 BFD_RELOC_390_TLS_GD32, /* ELF_SUFFIX_TLS_GD */ 1149 BFD_RELOC_390_TLS_GOTIE32, /* ELF_SUFFIX_TLS_GOTIE */ 1150 BFD_RELOC_390_TLS_IE32, /* ELF_SUFFIX_TLS_IE */ 1151 BFD_RELOC_390_TLS_LDM32, /* ELF_SUFFIX_TLS_LDM */ 1152 BFD_RELOC_390_TLS_LDO32, /* ELF_SUFFIX_TLS_LDO */ 1153 BFD_RELOC_390_TLS_LE32 /* ELF_SUFFIX_TLS_LE */ 1154 }; 1155 reloc = tab4[suffix]; 1156 } 1157 else if (nbytes == 8) 1158 { 1159 static bfd_reloc_code_real_type tab8[] = 1160 { 1161 BFD_RELOC_UNUSED, /* ELF_SUFFIX_NONE */ 1162 BFD_RELOC_390_GOT64, /* ELF_SUFFIX_GOT */ 1163 BFD_RELOC_390_PLT64, /* ELF_SUFFIX_PLT */ 1164 BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTENT */ 1165 BFD_RELOC_390_GOTOFF64, /* ELF_SUFFIX_GOTOFF */ 1166 BFD_RELOC_390_GOTPLT64, /* ELF_SUFFIX_GOTPLT */ 1167 BFD_RELOC_390_PLTOFF64, /* ELF_SUFFIX_PLTOFF */ 1168 BFD_RELOC_390_TLS_GD64, /* ELF_SUFFIX_TLS_GD */ 1169 BFD_RELOC_390_TLS_GOTIE64, /* ELF_SUFFIX_TLS_GOTIE */ 1170 BFD_RELOC_390_TLS_IE64, /* ELF_SUFFIX_TLS_IE */ 1171 BFD_RELOC_390_TLS_LDM64, /* ELF_SUFFIX_TLS_LDM */ 1172 BFD_RELOC_390_TLS_LDO64, /* ELF_SUFFIX_TLS_LDO */ 1173 BFD_RELOC_390_TLS_LE64 /* ELF_SUFFIX_TLS_LE */ 1174 }; 1175 reloc = tab8[suffix]; 1176 } 1177 else 1178 reloc = BFD_RELOC_UNUSED; 1179 1180 if (reloc != BFD_RELOC_UNUSED 1181 && (reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc))) 1182 { 1183 size = bfd_get_reloc_size (reloc_howto); 1184 if (size > nbytes) 1185 as_bad (_("%s relocations do not fit in %d bytes"), 1186 reloc_howto->name, nbytes); 1187 where = frag_more (nbytes); 1188 md_number_to_chars (where, 0, size); 1189 /* To make fixup_segment do the pc relative conversion the 1190 pcrel parameter on the fix_new_exp call needs to be FALSE. */ 1191 fix_new_exp (frag_now, where - frag_now->fr_literal, 1192 size, &exp, FALSE, reloc); 1193 } 1194 else 1195 as_bad (_("relocation not applicable")); 1196 } 1197 else 1198 emit_expr (&exp, (unsigned int) nbytes); 1199 } 1200 while (*input_line_pointer++ == ','); 1201 1202 input_line_pointer--; /* Put terminator back into stream. */ 1203 demand_empty_rest_of_line (); 1204 } 1205 1206 /* We need to keep a list of fixups. We can't simply generate them as 1207 we go, because that would require us to first create the frag, and 1208 that would screw up references to ``.''. */ 1209 1210 struct s390_fixup 1211 { 1212 expressionS exp; 1213 int opindex; 1214 bfd_reloc_code_real_type reloc; 1215 }; 1216 1217 #define MAX_INSN_FIXUPS (4) 1218 1219 /* This routine is called for each instruction to be assembled. */ 1220 1221 static char * 1222 md_gather_operands (char *str, 1223 unsigned char *insn, 1224 const struct s390_opcode *opcode) 1225 { 1226 struct s390_fixup fixups[MAX_INSN_FIXUPS]; 1227 const struct s390_operand *operand; 1228 const unsigned char *opindex_ptr; 1229 expressionS ex; 1230 elf_suffix_type suffix; 1231 bfd_reloc_code_real_type reloc; 1232 int skip_optional; 1233 char *f; 1234 int fc, i; 1235 1236 while (ISSPACE (*str)) 1237 str++; 1238 1239 skip_optional = 0; 1240 1241 /* Gather the operands. */ 1242 fc = 0; 1243 for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) 1244 { 1245 char *hold; 1246 1247 operand = s390_operands + *opindex_ptr; 1248 1249 if ((opcode->flags & S390_INSTR_FLAG_OPTPARM) && *str == '\0') 1250 { 1251 /* Optional parameters might need to be ORed with a 1252 value so calling s390_insert_operand is needed. */ 1253 s390_insert_operand (insn, operand, 0, NULL, 0); 1254 break; 1255 } 1256 1257 if (skip_optional && (operand->flags & S390_OPERAND_INDEX)) 1258 { 1259 /* We do an early skip. For D(X,B) constructions the index 1260 register is skipped (X is optional). For D(L,B) the base 1261 register will be the skipped operand, because L is NOT 1262 optional. */ 1263 skip_optional = 0; 1264 continue; 1265 } 1266 1267 /* Gather the operand. */ 1268 hold = input_line_pointer; 1269 input_line_pointer = str; 1270 1271 /* Parse the operand. */ 1272 if (! register_name (&ex)) 1273 expression (&ex); 1274 1275 str = input_line_pointer; 1276 input_line_pointer = hold; 1277 1278 /* Write the operand to the insn. */ 1279 if (ex.X_op == O_illegal) 1280 as_bad (_("illegal operand")); 1281 else if (ex.X_op == O_absent) 1282 { 1283 /* No operands, check if all operands can be skipped. */ 1284 while (*opindex_ptr != 0 && operand->flags & S390_OPERAND_OPTIONAL) 1285 { 1286 if (operand->flags & S390_OPERAND_DISP) 1287 { 1288 /* An optional displacement makes the whole D(X,B) 1289 D(L,B) or D(B) block optional. */ 1290 do { 1291 operand = s390_operands + *(++opindex_ptr); 1292 } while (!(operand->flags & S390_OPERAND_BASE)); 1293 } 1294 operand = s390_operands + *(++opindex_ptr); 1295 } 1296 if (opindex_ptr[0] == '\0') 1297 break; 1298 as_bad (_("missing operand")); 1299 } 1300 else if (ex.X_op == O_register || ex.X_op == O_constant) 1301 { 1302 s390_lit_suffix (&str, &ex, ELF_SUFFIX_NONE); 1303 1304 if (ex.X_op != O_register && ex.X_op != O_constant) 1305 { 1306 /* We need to generate a fixup for the 1307 expression returned by s390_lit_suffix. */ 1308 if (fc >= MAX_INSN_FIXUPS) 1309 as_fatal (_("too many fixups")); 1310 fixups[fc].exp = ex; 1311 fixups[fc].opindex = *opindex_ptr; 1312 fixups[fc].reloc = BFD_RELOC_UNUSED; 1313 ++fc; 1314 } 1315 else 1316 { 1317 if ((operand->flags & S390_OPERAND_LENGTH) 1318 && ex.X_op != O_constant) 1319 as_fatal (_("invalid length field specified")); 1320 if ((operand->flags & S390_OPERAND_INDEX) 1321 && ex.X_add_number == 0 1322 && warn_areg_zero) 1323 as_warn (_("index register specified but zero")); 1324 if ((operand->flags & S390_OPERAND_BASE) 1325 && ex.X_add_number == 0 1326 && warn_areg_zero) 1327 as_warn (_("base register specified but zero")); 1328 if ((operand->flags & S390_OPERAND_GPR) 1329 && (operand->flags & S390_OPERAND_REG_PAIR) 1330 && (ex.X_add_number & 1)) 1331 as_fatal (_("odd numbered general purpose register specified as " 1332 "register pair")); 1333 if ((operand->flags & S390_OPERAND_FPR) 1334 && (operand->flags & S390_OPERAND_REG_PAIR) 1335 && ex.X_add_number != 0 && ex.X_add_number != 1 1336 && ex.X_add_number != 4 && ex.X_add_number != 5 1337 && ex.X_add_number != 8 && ex.X_add_number != 9 1338 && ex.X_add_number != 12 && ex.X_add_number != 13) 1339 as_fatal (_("invalid floating point register pair. Valid fp " 1340 "register pair operands are 0, 1, 4, 5, 8, 9, " 1341 "12 or 13.")); 1342 s390_insert_operand (insn, operand, ex.X_add_number, NULL, 0); 1343 } 1344 } 1345 else 1346 { 1347 suffix = s390_elf_suffix (&str, &ex); 1348 suffix = s390_lit_suffix (&str, &ex, suffix); 1349 reloc = BFD_RELOC_UNUSED; 1350 1351 if (suffix == ELF_SUFFIX_GOT) 1352 { 1353 if ((operand->flags & S390_OPERAND_DISP) && 1354 (operand->bits == 12)) 1355 reloc = BFD_RELOC_390_GOT12; 1356 else if ((operand->flags & S390_OPERAND_DISP) && 1357 (operand->bits == 20)) 1358 reloc = BFD_RELOC_390_GOT20; 1359 else if ((operand->flags & S390_OPERAND_SIGNED) 1360 && (operand->bits == 16)) 1361 reloc = BFD_RELOC_390_GOT16; 1362 else if ((operand->flags & S390_OPERAND_PCREL) 1363 && (operand->bits == 32)) 1364 reloc = BFD_RELOC_390_GOTENT; 1365 } 1366 else if (suffix == ELF_SUFFIX_PLT) 1367 { 1368 if ((operand->flags & S390_OPERAND_PCREL) 1369 && (operand->bits == 12)) 1370 reloc = BFD_RELOC_390_PLT12DBL; 1371 else if ((operand->flags & S390_OPERAND_PCREL) 1372 && (operand->bits == 16)) 1373 reloc = BFD_RELOC_390_PLT16DBL; 1374 else if ((operand->flags & S390_OPERAND_PCREL) 1375 && (operand->bits == 24)) 1376 reloc = BFD_RELOC_390_PLT24DBL; 1377 else if ((operand->flags & S390_OPERAND_PCREL) 1378 && (operand->bits == 32)) 1379 reloc = BFD_RELOC_390_PLT32DBL; 1380 } 1381 else if (suffix == ELF_SUFFIX_GOTENT) 1382 { 1383 if ((operand->flags & S390_OPERAND_PCREL) 1384 && (operand->bits == 32)) 1385 reloc = BFD_RELOC_390_GOTENT; 1386 } 1387 else if (suffix == ELF_SUFFIX_GOTOFF) 1388 { 1389 if ((operand->flags & S390_OPERAND_SIGNED) 1390 && (operand->bits == 16)) 1391 reloc = BFD_RELOC_16_GOTOFF; 1392 } 1393 else if (suffix == ELF_SUFFIX_PLTOFF) 1394 { 1395 if ((operand->flags & S390_OPERAND_SIGNED) 1396 && (operand->bits == 16)) 1397 reloc = BFD_RELOC_390_PLTOFF16; 1398 } 1399 else if (suffix == ELF_SUFFIX_GOTPLT) 1400 { 1401 if ((operand->flags & S390_OPERAND_DISP) 1402 && (operand->bits == 12)) 1403 reloc = BFD_RELOC_390_GOTPLT12; 1404 else if ((operand->flags & S390_OPERAND_SIGNED) 1405 && (operand->bits == 16)) 1406 reloc = BFD_RELOC_390_GOTPLT16; 1407 else if ((operand->flags & S390_OPERAND_PCREL) 1408 && (operand->bits == 32)) 1409 reloc = BFD_RELOC_390_GOTPLTENT; 1410 } 1411 else if (suffix == ELF_SUFFIX_TLS_GOTIE) 1412 { 1413 if ((operand->flags & S390_OPERAND_DISP) 1414 && (operand->bits == 12)) 1415 reloc = BFD_RELOC_390_TLS_GOTIE12; 1416 else if ((operand->flags & S390_OPERAND_DISP) 1417 && (operand->bits == 20)) 1418 reloc = BFD_RELOC_390_TLS_GOTIE20; 1419 } 1420 else if (suffix == ELF_SUFFIX_TLS_IE) 1421 { 1422 if ((operand->flags & S390_OPERAND_PCREL) 1423 && (operand->bits == 32)) 1424 reloc = BFD_RELOC_390_TLS_IEENT; 1425 } 1426 1427 if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) 1428 as_bad (_("invalid operand suffix")); 1429 /* We need to generate a fixup of type 'reloc' for this 1430 expression. */ 1431 if (fc >= MAX_INSN_FIXUPS) 1432 as_fatal (_("too many fixups")); 1433 fixups[fc].exp = ex; 1434 fixups[fc].opindex = *opindex_ptr; 1435 fixups[fc].reloc = reloc; 1436 ++fc; 1437 } 1438 1439 /* Check the next character. The call to expression has advanced 1440 str past any whitespace. */ 1441 if (operand->flags & S390_OPERAND_DISP) 1442 { 1443 /* After a displacement a block in parentheses can start. */ 1444 if (*str != '(') 1445 { 1446 /* Check if parenthesized block can be skipped. If the next 1447 operand is neiter an optional operand nor a base register 1448 then we have a syntax error. */ 1449 operand = s390_operands + *(++opindex_ptr); 1450 if (!(operand->flags & (S390_OPERAND_INDEX|S390_OPERAND_BASE))) 1451 as_bad (_("syntax error; missing '(' after displacement")); 1452 1453 /* Ok, skip all operands until S390_OPERAND_BASE. */ 1454 while (!(operand->flags & S390_OPERAND_BASE)) 1455 operand = s390_operands + *(++opindex_ptr); 1456 1457 /* If there is a next operand it must be separated by a comma. */ 1458 if (opindex_ptr[1] != '\0') 1459 { 1460 if (*str != ',') 1461 { 1462 while (opindex_ptr[1] != '\0') 1463 { 1464 operand = s390_operands + *(++opindex_ptr); 1465 if (operand->flags & S390_OPERAND_OPTIONAL) 1466 continue; 1467 as_bad (_("syntax error; expected ,")); 1468 break; 1469 } 1470 } 1471 else 1472 str++; 1473 } 1474 } 1475 else 1476 { 1477 /* We found an opening parentheses. */ 1478 str++; 1479 for (f = str; *f != '\0'; f++) 1480 if (*f == ',' || *f == ')') 1481 break; 1482 /* If there is no comma until the closing parentheses OR 1483 there is a comma right after the opening parentheses, 1484 we have to skip optional operands. */ 1485 if (*f == ',' && f == str) 1486 { 1487 /* comma directly after '(' ? */ 1488 skip_optional = 1; 1489 str++; 1490 } 1491 else 1492 skip_optional = (*f != ','); 1493 } 1494 } 1495 else if (operand->flags & S390_OPERAND_BASE) 1496 { 1497 /* After the base register the parenthesed block ends. */ 1498 if (*str++ != ')') 1499 as_bad (_("syntax error; missing ')' after base register")); 1500 skip_optional = 0; 1501 /* If there is a next operand it must be separated by a comma. */ 1502 if (opindex_ptr[1] != '\0') 1503 { 1504 if (*str != ',') 1505 { 1506 while (opindex_ptr[1] != '\0') 1507 { 1508 operand = s390_operands + *(++opindex_ptr); 1509 if (operand->flags & S390_OPERAND_OPTIONAL) 1510 continue; 1511 as_bad (_("syntax error; expected ,")); 1512 break; 1513 } 1514 } 1515 else 1516 str++; 1517 } 1518 } 1519 else 1520 { 1521 /* We can find an 'early' closing parentheses in e.g. D(L) instead 1522 of D(L,B). In this case the base register has to be skipped. */ 1523 if (*str == ')') 1524 { 1525 operand = s390_operands + *(++opindex_ptr); 1526 1527 if (!(operand->flags & S390_OPERAND_BASE)) 1528 as_bad (_("syntax error; ')' not allowed here")); 1529 str++; 1530 } 1531 1532 if ((opcode->flags & S390_INSTR_FLAG_OPTPARM) && *str == '\0') 1533 continue; 1534 1535 /* If there is a next operand it must be separated by a comma. */ 1536 if (opindex_ptr[1] != '\0') 1537 { 1538 if (*str != ',') 1539 { 1540 while (opindex_ptr[1] != '\0') 1541 { 1542 operand = s390_operands + *(++opindex_ptr); 1543 if (operand->flags & S390_OPERAND_OPTIONAL) 1544 continue; 1545 as_bad (_("syntax error; expected ,")); 1546 break; 1547 } 1548 } 1549 else 1550 str++; 1551 } 1552 } 1553 } 1554 1555 while (ISSPACE (*str)) 1556 ++str; 1557 1558 /* Check for tls instruction marker. */ 1559 reloc = s390_tls_suffix (&str, &ex); 1560 if (reloc != BFD_RELOC_UNUSED) 1561 { 1562 /* We need to generate a fixup of type 'reloc' for this 1563 instruction. */ 1564 if (fc >= MAX_INSN_FIXUPS) 1565 as_fatal (_("too many fixups")); 1566 fixups[fc].exp = ex; 1567 fixups[fc].opindex = -1; 1568 fixups[fc].reloc = reloc; 1569 ++fc; 1570 } 1571 1572 if (*str != '\0') 1573 { 1574 char *linefeed; 1575 1576 if ((linefeed = strchr (str, '\n')) != NULL) 1577 *linefeed = '\0'; 1578 as_bad (_("junk at end of line: `%s'"), str); 1579 if (linefeed != NULL) 1580 *linefeed = '\n'; 1581 } 1582 1583 /* Write out the instruction. */ 1584 f = frag_more (opcode->oplen); 1585 memcpy (f, insn, opcode->oplen); 1586 dwarf2_emit_insn (opcode->oplen); 1587 1588 /* Create any fixups. At this point we do not use a 1589 bfd_reloc_code_real_type, but instead just use the 1590 BFD_RELOC_UNUSED plus the operand index. This lets us easily 1591 handle fixups for any operand type, although that is admittedly 1592 not a very exciting feature. We pick a BFD reloc type in 1593 md_apply_fix. */ 1594 for (i = 0; i < fc; i++) 1595 { 1596 1597 if (fixups[i].opindex < 0) 1598 { 1599 /* Create tls instruction marker relocation. */ 1600 fix_new_exp (frag_now, f - frag_now->fr_literal, opcode->oplen, 1601 &fixups[i].exp, 0, fixups[i].reloc); 1602 continue; 1603 } 1604 1605 operand = s390_operands + fixups[i].opindex; 1606 1607 if (fixups[i].reloc != BFD_RELOC_UNUSED) 1608 { 1609 reloc_howto_type *reloc_howto; 1610 fixS *fixP; 1611 int size; 1612 1613 reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); 1614 if (!reloc_howto) 1615 abort (); 1616 1617 size = ((reloc_howto->bitsize - 1) / 8) + 1; 1618 1619 if (size < 1 || size > 4) 1620 abort (); 1621 1622 fixP = fix_new_exp (frag_now, 1623 f - frag_now->fr_literal + (operand->shift/8), 1624 size, &fixups[i].exp, reloc_howto->pc_relative, 1625 fixups[i].reloc); 1626 /* Turn off overflow checking in fixup_segment. This is necessary 1627 because fixup_segment will signal an overflow for large 4 byte 1628 quantities for GOT12 relocations. */ 1629 if ( fixups[i].reloc == BFD_RELOC_390_GOT12 1630 || fixups[i].reloc == BFD_RELOC_390_GOT20 1631 || fixups[i].reloc == BFD_RELOC_390_GOT16) 1632 fixP->fx_no_overflow = 1; 1633 } 1634 else 1635 fix_new_exp (frag_now, f - frag_now->fr_literal, 4, &fixups[i].exp, 1636 (operand->flags & S390_OPERAND_PCREL) != 0, 1637 ((bfd_reloc_code_real_type) 1638 (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); 1639 } 1640 return str; 1641 } 1642 1643 /* This routine is called for each instruction to be assembled. */ 1644 1645 void 1646 md_assemble (char *str) 1647 { 1648 const struct s390_opcode *opcode; 1649 unsigned char insn[6]; 1650 char *s; 1651 1652 /* Get the opcode. */ 1653 for (s = str; *s != '\0' && ! ISSPACE (*s); s++) 1654 ; 1655 if (*s != '\0') 1656 *s++ = '\0'; 1657 1658 /* Look up the opcode in the hash table. */ 1659 opcode = (struct s390_opcode *) hash_find (s390_opcode_hash, str); 1660 if (opcode == (const struct s390_opcode *) NULL) 1661 { 1662 as_bad (_("Unrecognized opcode: `%s'"), str); 1663 return; 1664 } 1665 else if (!(opcode->modes & current_mode_mask)) 1666 { 1667 as_bad (_("Opcode %s not available in this mode"), str); 1668 return; 1669 } 1670 memcpy (insn, opcode->opcode, sizeof (insn)); 1671 md_gather_operands (s, insn, opcode); 1672 } 1673 1674 #ifndef WORKING_DOT_WORD 1675 /* Handle long and short jumps. We don't support these */ 1676 void 1677 md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) 1678 char *ptr; 1679 addressT from_addr, to_addr; 1680 fragS *frag; 1681 symbolS *to_symbol; 1682 { 1683 abort (); 1684 } 1685 1686 void 1687 md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) 1688 char *ptr; 1689 addressT from_addr, to_addr; 1690 fragS *frag; 1691 symbolS *to_symbol; 1692 { 1693 abort (); 1694 } 1695 #endif 1696 1697 void 1698 s390_bss (int ignore ATTRIBUTE_UNUSED) 1699 { 1700 /* We don't support putting frags in the BSS segment, we fake it 1701 by marking in_bss, then looking at s_skip for clues. */ 1702 1703 subseg_set (bss_section, 0); 1704 demand_empty_rest_of_line (); 1705 } 1706 1707 /* Pseudo-op handling. */ 1708 1709 void 1710 s390_insn (int ignore ATTRIBUTE_UNUSED) 1711 { 1712 expressionS exp; 1713 const struct s390_opcode *opformat; 1714 unsigned char insn[6]; 1715 char *s; 1716 1717 /* Get the opcode format. */ 1718 s = input_line_pointer; 1719 while (*s != '\0' && *s != ',' && ! ISSPACE (*s)) 1720 s++; 1721 if (*s != ',') 1722 as_bad (_("Invalid .insn format\n")); 1723 *s++ = '\0'; 1724 1725 /* Look up the opcode in the hash table. */ 1726 opformat = (struct s390_opcode *) 1727 hash_find (s390_opformat_hash, input_line_pointer); 1728 if (opformat == (const struct s390_opcode *) NULL) 1729 { 1730 as_bad (_("Unrecognized opcode format: `%s'"), input_line_pointer); 1731 return; 1732 } 1733 input_line_pointer = s; 1734 expression (&exp); 1735 if (exp.X_op == O_constant) 1736 { 1737 if ( ( opformat->oplen == 6 1738 && (addressT) exp.X_add_number < (1ULL << 48)) 1739 || ( opformat->oplen == 4 1740 && (addressT) exp.X_add_number < (1ULL << 32)) 1741 || ( opformat->oplen == 2 1742 && (addressT) exp.X_add_number < (1ULL << 16))) 1743 md_number_to_chars ((char *) insn, exp.X_add_number, opformat->oplen); 1744 else 1745 as_bad (_("Invalid .insn format\n")); 1746 } 1747 else if (exp.X_op == O_big) 1748 { 1749 if (exp.X_add_number > 0 1750 && opformat->oplen == 6 1751 && generic_bignum[3] == 0) 1752 { 1753 md_number_to_chars ((char *) insn, generic_bignum[2], 2); 1754 md_number_to_chars ((char *) &insn[2], generic_bignum[1], 2); 1755 md_number_to_chars ((char *) &insn[4], generic_bignum[0], 2); 1756 } 1757 else 1758 as_bad (_("Invalid .insn format\n")); 1759 } 1760 else 1761 as_bad (_("second operand of .insn not a constant\n")); 1762 1763 if (strcmp (opformat->name, "e") != 0 && *input_line_pointer++ != ',') 1764 as_bad (_("missing comma after insn constant\n")); 1765 1766 if ((s = strchr (input_line_pointer, '\n')) != NULL) 1767 *s = '\0'; 1768 input_line_pointer = md_gather_operands (input_line_pointer, insn, 1769 opformat); 1770 if (s != NULL) 1771 *s = '\n'; 1772 demand_empty_rest_of_line (); 1773 } 1774 1775 /* The .byte pseudo-op. This is similar to the normal .byte 1776 pseudo-op, but it can also take a single ASCII string. */ 1777 1778 static void 1779 s390_byte (int ignore ATTRIBUTE_UNUSED) 1780 { 1781 if (*input_line_pointer != '\"') 1782 { 1783 cons (1); 1784 return; 1785 } 1786 1787 /* Gather characters. A real double quote is doubled. Unusual 1788 characters are not permitted. */ 1789 ++input_line_pointer; 1790 while (1) 1791 { 1792 char c; 1793 1794 c = *input_line_pointer++; 1795 1796 if (c == '\"') 1797 { 1798 if (*input_line_pointer != '\"') 1799 break; 1800 ++input_line_pointer; 1801 } 1802 1803 FRAG_APPEND_1_CHAR (c); 1804 } 1805 1806 demand_empty_rest_of_line (); 1807 } 1808 1809 /* The .ltorg pseudo-op.This emits all literals defined since the last 1810 .ltorg or the invocation of gas. Literals are defined with the 1811 @lit suffix. */ 1812 1813 static void 1814 s390_literals (int ignore ATTRIBUTE_UNUSED) 1815 { 1816 struct s390_lpe *lpe; 1817 1818 if (lp_sym == NULL || lpe_count == 0) 1819 return; /* Nothing to be done. */ 1820 1821 /* Emit symbol for start of literal pool. */ 1822 S_SET_SEGMENT (lp_sym, now_seg); 1823 S_SET_VALUE (lp_sym, (valueT) frag_now_fix ()); 1824 lp_sym->sy_frag = frag_now; 1825 1826 while (lpe_list) 1827 { 1828 lpe = lpe_list; 1829 lpe_list = lpe_list->next; 1830 S_SET_SEGMENT (lpe->sym, now_seg); 1831 S_SET_VALUE (lpe->sym, (valueT) frag_now_fix ()); 1832 lpe->sym->sy_frag = frag_now; 1833 1834 /* Emit literal pool entry. */ 1835 if (lpe->reloc != BFD_RELOC_UNUSED) 1836 { 1837 reloc_howto_type *reloc_howto = 1838 bfd_reloc_type_lookup (stdoutput, lpe->reloc); 1839 int size = bfd_get_reloc_size (reloc_howto); 1840 char *where; 1841 1842 if (size > lpe->nbytes) 1843 as_bad (_("%s relocations do not fit in %d bytes"), 1844 reloc_howto->name, lpe->nbytes); 1845 where = frag_more (lpe->nbytes); 1846 md_number_to_chars (where, 0, size); 1847 fix_new_exp (frag_now, where - frag_now->fr_literal, 1848 size, &lpe->ex, reloc_howto->pc_relative, lpe->reloc); 1849 } 1850 else 1851 { 1852 if (lpe->ex.X_op == O_big) 1853 { 1854 if (lpe->ex.X_add_number <= 0) 1855 generic_floating_point_number = lpe->floatnum; 1856 else 1857 memcpy (generic_bignum, lpe->bignum, 1858 lpe->ex.X_add_number * sizeof (LITTLENUM_TYPE)); 1859 } 1860 emit_expr (&lpe->ex, lpe->nbytes); 1861 } 1862 1863 lpe->next = lpe_free_list; 1864 lpe_free_list = lpe; 1865 } 1866 lpe_list_tail = NULL; 1867 lp_sym = NULL; 1868 lp_count++; 1869 lpe_count = 0; 1870 } 1871 1872 #define MAX_HISTORY 100 1873 1874 /* The .machine pseudo op allows to switch to a different CPU level in 1875 the asm listing. The current CPU setting can be stored on a stack 1876 with .machine push and restored with .machine pop. */ 1877 1878 static void 1879 s390_machine (int ignore ATTRIBUTE_UNUSED) 1880 { 1881 char *cpu_string; 1882 static struct cpu_history 1883 { 1884 unsigned int cpu; 1885 unsigned int flags; 1886 } *cpu_history; 1887 static int curr_hist; 1888 1889 SKIP_WHITESPACE (); 1890 1891 if (*input_line_pointer == '"') 1892 { 1893 int len; 1894 cpu_string = demand_copy_C_string (&len); 1895 } 1896 else 1897 { 1898 char c; 1899 1900 cpu_string = input_line_pointer; 1901 do 1902 { 1903 char * str; 1904 1905 c = get_symbol_name (&str); 1906 c = restore_line_pointer (c); 1907 if (c == '+') 1908 ++ input_line_pointer; 1909 } 1910 while (c == '+'); 1911 1912 c = *input_line_pointer; 1913 *input_line_pointer = 0; 1914 cpu_string = xstrdup (cpu_string); 1915 (void) restore_line_pointer (c); 1916 } 1917 1918 if (cpu_string != NULL) 1919 { 1920 unsigned int new_cpu = current_cpu; 1921 unsigned int new_flags = current_flags; 1922 1923 if (strcmp (cpu_string, "push") == 0) 1924 { 1925 if (cpu_history == NULL) 1926 cpu_history = XNEWVEC (struct cpu_history, MAX_HISTORY); 1927 1928 if (curr_hist >= MAX_HISTORY) 1929 as_bad (_(".machine stack overflow")); 1930 else 1931 { 1932 cpu_history[curr_hist].cpu = current_cpu; 1933 cpu_history[curr_hist].flags = current_flags; 1934 curr_hist++; 1935 } 1936 } 1937 else if (strcmp (cpu_string, "pop") == 0) 1938 { 1939 if (curr_hist <= 0) 1940 as_bad (_(".machine stack underflow")); 1941 else 1942 { 1943 curr_hist--; 1944 new_cpu = cpu_history[curr_hist].cpu; 1945 new_flags = cpu_history[curr_hist].flags; 1946 } 1947 } 1948 else 1949 new_cpu = s390_parse_cpu (cpu_string, &new_flags, TRUE); 1950 1951 if (new_cpu == S390_OPCODE_MAXCPU) 1952 as_bad (_("invalid machine `%s'"), cpu_string); 1953 1954 if (new_cpu != current_cpu || new_flags != current_flags) 1955 { 1956 current_cpu = new_cpu; 1957 current_flags = new_flags; 1958 s390_setup_opcodes (); 1959 } 1960 } 1961 1962 demand_empty_rest_of_line (); 1963 } 1964 1965 /* The .machinemode pseudo op allows to switch to a different 1966 architecture mode in the asm listing. The current architecture 1967 mode setting can be stored on a stack with .machinemode push and 1968 restored with .machinemode pop. */ 1969 1970 static void 1971 s390_machinemode (int ignore ATTRIBUTE_UNUSED) 1972 { 1973 char *mode_string; 1974 static unsigned int *mode_history; 1975 static int curr_hist; 1976 1977 SKIP_WHITESPACE (); 1978 1979 { 1980 char c; 1981 1982 c = get_symbol_name (&mode_string); 1983 mode_string = xstrdup (mode_string); 1984 (void) restore_line_pointer (c); 1985 } 1986 1987 if (mode_string != NULL) 1988 { 1989 unsigned int old_mode_mask = current_mode_mask; 1990 char *p; 1991 1992 for (p = mode_string; *p != 0; p++) 1993 *p = TOLOWER (*p); 1994 1995 if (strcmp (mode_string, "push") == 0) 1996 { 1997 if (mode_history == NULL) 1998 mode_history = XNEWVEC (unsigned int, MAX_HISTORY); 1999 2000 if (curr_hist >= MAX_HISTORY) 2001 as_bad (_(".machinemode stack overflow")); 2002 else 2003 mode_history[curr_hist++] = current_mode_mask; 2004 } 2005 else if (strcmp (mode_string, "pop") == 0) 2006 { 2007 if (curr_hist <= 0) 2008 as_bad (_(".machinemode stack underflow")); 2009 else 2010 current_mode_mask = mode_history[--curr_hist]; 2011 } 2012 else 2013 { 2014 if (strcmp (mode_string, "esa") == 0) 2015 current_mode_mask = 1 << S390_OPCODE_ESA; 2016 else if (strcmp (mode_string, "zarch") == 0) 2017 { 2018 if (s390_arch_size == 32) 2019 set_highgprs_p = TRUE; 2020 current_mode_mask = 1 << S390_OPCODE_ZARCH; 2021 } 2022 else if (strcmp (mode_string, "zarch_nohighgprs") == 0) 2023 current_mode_mask = 1 << S390_OPCODE_ZARCH; 2024 else 2025 as_bad (_("invalid machine mode `%s'"), mode_string); 2026 } 2027 2028 if (current_mode_mask != old_mode_mask) 2029 s390_setup_opcodes (); 2030 } 2031 2032 demand_empty_rest_of_line (); 2033 } 2034 2035 #undef MAX_HISTORY 2036 2037 const char * 2038 md_atof (int type, char *litp, int *sizep) 2039 { 2040 return ieee_md_atof (type, litp, sizep, TRUE); 2041 } 2042 2043 /* Align a section (I don't know why this is machine dependent). */ 2044 2045 valueT 2046 md_section_align (asection *seg, valueT addr) 2047 { 2048 int align = bfd_get_section_alignment (stdoutput, seg); 2049 2050 return ((addr + (1 << align) - 1) & -(1 << align)); 2051 } 2052 2053 /* We don't have any form of relaxing. */ 2054 2055 int 2056 md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, 2057 asection *seg ATTRIBUTE_UNUSED) 2058 { 2059 abort (); 2060 return 0; 2061 } 2062 2063 /* Convert a machine dependent frag. We never generate these. */ 2064 2065 void 2066 md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, 2067 asection *sec ATTRIBUTE_UNUSED, 2068 fragS *fragp ATTRIBUTE_UNUSED) 2069 { 2070 abort (); 2071 } 2072 2073 symbolS * 2074 md_undefined_symbol (char *name) 2075 { 2076 if (*name == '_' && *(name + 1) == 'G' 2077 && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) 2078 { 2079 if (!GOT_symbol) 2080 { 2081 if (symbol_find (name)) 2082 as_bad (_("GOT already in symbol table")); 2083 GOT_symbol = symbol_new (name, undefined_section, 2084 (valueT) 0, &zero_address_frag); 2085 } 2086 return GOT_symbol; 2087 } 2088 return 0; 2089 } 2090 2091 /* Functions concerning relocs. */ 2092 2093 /* The location from which a PC relative jump should be calculated, 2094 given a PC relative reloc. */ 2095 2096 long 2097 md_pcrel_from_section (fixS *fixp, segT sec ATTRIBUTE_UNUSED) 2098 { 2099 return fixp->fx_frag->fr_address + fixp->fx_where; 2100 } 2101 2102 /* Here we decide which fixups can be adjusted to make them relative to 2103 the beginning of the section instead of the symbol. Basically we need 2104 to make sure that the dynamic relocations are done correctly, so in 2105 some cases we force the original symbol to be used. */ 2106 int 2107 tc_s390_fix_adjustable (fixS *fixP) 2108 { 2109 /* Don't adjust references to merge sections. */ 2110 if ((S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE) != 0) 2111 return 0; 2112 /* adjust_reloc_syms doesn't know about the GOT. */ 2113 if ( fixP->fx_r_type == BFD_RELOC_16_GOTOFF 2114 || fixP->fx_r_type == BFD_RELOC_32_GOTOFF 2115 || fixP->fx_r_type == BFD_RELOC_390_GOTOFF64 2116 || fixP->fx_r_type == BFD_RELOC_390_PLTOFF16 2117 || fixP->fx_r_type == BFD_RELOC_390_PLTOFF32 2118 || fixP->fx_r_type == BFD_RELOC_390_PLTOFF64 2119 || fixP->fx_r_type == BFD_RELOC_390_PLT12DBL 2120 || fixP->fx_r_type == BFD_RELOC_390_PLT16DBL 2121 || fixP->fx_r_type == BFD_RELOC_390_PLT24DBL 2122 || fixP->fx_r_type == BFD_RELOC_390_PLT32 2123 || fixP->fx_r_type == BFD_RELOC_390_PLT32DBL 2124 || fixP->fx_r_type == BFD_RELOC_390_PLT64 2125 || fixP->fx_r_type == BFD_RELOC_390_GOT12 2126 || fixP->fx_r_type == BFD_RELOC_390_GOT20 2127 || fixP->fx_r_type == BFD_RELOC_390_GOT16 2128 || fixP->fx_r_type == BFD_RELOC_32_GOT_PCREL 2129 || fixP->fx_r_type == BFD_RELOC_390_GOT64 2130 || fixP->fx_r_type == BFD_RELOC_390_GOTENT 2131 || fixP->fx_r_type == BFD_RELOC_390_GOTPLT12 2132 || fixP->fx_r_type == BFD_RELOC_390_GOTPLT16 2133 || fixP->fx_r_type == BFD_RELOC_390_GOTPLT20 2134 || fixP->fx_r_type == BFD_RELOC_390_GOTPLT32 2135 || fixP->fx_r_type == BFD_RELOC_390_GOTPLT64 2136 || fixP->fx_r_type == BFD_RELOC_390_GOTPLTENT 2137 || fixP->fx_r_type == BFD_RELOC_390_TLS_LOAD 2138 || fixP->fx_r_type == BFD_RELOC_390_TLS_GDCALL 2139 || fixP->fx_r_type == BFD_RELOC_390_TLS_LDCALL 2140 || fixP->fx_r_type == BFD_RELOC_390_TLS_GD32 2141 || fixP->fx_r_type == BFD_RELOC_390_TLS_GD64 2142 || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE12 2143 || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE20 2144 || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE32 2145 || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE64 2146 || fixP->fx_r_type == BFD_RELOC_390_TLS_LDM32 2147 || fixP->fx_r_type == BFD_RELOC_390_TLS_LDM64 2148 || fixP->fx_r_type == BFD_RELOC_390_TLS_IE32 2149 || fixP->fx_r_type == BFD_RELOC_390_TLS_IE64 2150 || fixP->fx_r_type == BFD_RELOC_390_TLS_IEENT 2151 || fixP->fx_r_type == BFD_RELOC_390_TLS_LE32 2152 || fixP->fx_r_type == BFD_RELOC_390_TLS_LE64 2153 || fixP->fx_r_type == BFD_RELOC_390_TLS_LDO32 2154 || fixP->fx_r_type == BFD_RELOC_390_TLS_LDO64 2155 || fixP->fx_r_type == BFD_RELOC_390_TLS_DTPMOD 2156 || fixP->fx_r_type == BFD_RELOC_390_TLS_DTPOFF 2157 || fixP->fx_r_type == BFD_RELOC_390_TLS_TPOFF 2158 || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT 2159 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) 2160 return 0; 2161 return 1; 2162 } 2163 2164 /* Return true if we must always emit a reloc for a type and false if 2165 there is some hope of resolving it at assembly time. */ 2166 int 2167 tc_s390_force_relocation (struct fix *fixp) 2168 { 2169 /* Ensure we emit a relocation for every reference to the global 2170 offset table or to the procedure link table. */ 2171 switch (fixp->fx_r_type) 2172 { 2173 case BFD_RELOC_390_GOT12: 2174 case BFD_RELOC_390_GOT20: 2175 case BFD_RELOC_32_GOT_PCREL: 2176 case BFD_RELOC_32_GOTOFF: 2177 case BFD_RELOC_390_GOTOFF64: 2178 case BFD_RELOC_390_PLTOFF16: 2179 case BFD_RELOC_390_PLTOFF32: 2180 case BFD_RELOC_390_PLTOFF64: 2181 case BFD_RELOC_390_GOTPC: 2182 case BFD_RELOC_390_GOT16: 2183 case BFD_RELOC_390_GOTPCDBL: 2184 case BFD_RELOC_390_GOT64: 2185 case BFD_RELOC_390_GOTENT: 2186 case BFD_RELOC_390_PLT32: 2187 case BFD_RELOC_390_PLT12DBL: 2188 case BFD_RELOC_390_PLT16DBL: 2189 case BFD_RELOC_390_PLT24DBL: 2190 case BFD_RELOC_390_PLT32DBL: 2191 case BFD_RELOC_390_PLT64: 2192 case BFD_RELOC_390_GOTPLT12: 2193 case BFD_RELOC_390_GOTPLT16: 2194 case BFD_RELOC_390_GOTPLT20: 2195 case BFD_RELOC_390_GOTPLT32: 2196 case BFD_RELOC_390_GOTPLT64: 2197 case BFD_RELOC_390_GOTPLTENT: 2198 return 1; 2199 default: 2200 break; 2201 } 2202 2203 return generic_force_reloc (fixp); 2204 } 2205 2206 /* Apply a fixup to the object code. This is called for all the 2207 fixups we generated by the call to fix_new_exp, above. In the call 2208 above we used a reloc code which was the largest legal reloc code 2209 plus the operand index. Here we undo that to recover the operand 2210 index. At this point all symbol values should be fully resolved, 2211 and we attempt to completely resolve the reloc. If we can not do 2212 that, we determine the correct reloc code and put it back in the 2213 fixup. */ 2214 2215 void 2216 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) 2217 { 2218 char *where; 2219 valueT value = *valP; 2220 2221 where = fixP->fx_frag->fr_literal + fixP->fx_where; 2222 2223 if (fixP->fx_subsy != NULL) 2224 as_bad_where (fixP->fx_file, fixP->fx_line, 2225 _("cannot emit relocation %s against subsy symbol %s"), 2226 bfd_get_reloc_code_name (fixP->fx_r_type), 2227 S_GET_NAME (fixP->fx_subsy)); 2228 2229 if (fixP->fx_addsy != NULL) 2230 { 2231 if (fixP->fx_pcrel) 2232 value += fixP->fx_frag->fr_address + fixP->fx_where; 2233 } 2234 else 2235 fixP->fx_done = 1; 2236 2237 if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) 2238 { 2239 const struct s390_operand *operand; 2240 int opindex; 2241 2242 opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; 2243 operand = &s390_operands[opindex]; 2244 2245 if (fixP->fx_done) 2246 { 2247 /* Insert the fully resolved operand value. */ 2248 s390_insert_operand ((unsigned char *) where, operand, 2249 (offsetT) value, fixP->fx_file, fixP->fx_line); 2250 return; 2251 } 2252 2253 /* Determine a BFD reloc value based on the operand information. 2254 We are only prepared to turn a few of the operands into 2255 relocs. */ 2256 fixP->fx_offset = value; 2257 if (operand->bits == 12 && operand->shift == 20) 2258 { 2259 fixP->fx_size = 2; 2260 fixP->fx_where += 2; 2261 fixP->fx_r_type = BFD_RELOC_390_12; 2262 } 2263 else if (operand->bits == 12 && operand->shift == 36) 2264 { 2265 fixP->fx_size = 2; 2266 fixP->fx_where += 4; 2267 fixP->fx_r_type = BFD_RELOC_390_12; 2268 } 2269 else if (operand->bits == 20 && operand->shift == 20) 2270 { 2271 fixP->fx_size = 2; 2272 fixP->fx_where += 2; 2273 fixP->fx_r_type = BFD_RELOC_390_20; 2274 } 2275 else if (operand->bits == 8 && operand->shift == 8) 2276 { 2277 fixP->fx_size = 1; 2278 fixP->fx_where += 1; 2279 fixP->fx_r_type = BFD_RELOC_8; 2280 } 2281 else if (operand->bits == 12 && operand->shift == 12 2282 && (operand->flags & S390_OPERAND_PCREL)) 2283 { 2284 fixP->fx_size = 2; 2285 fixP->fx_where += 1; 2286 fixP->fx_offset += 1; 2287 fixP->fx_r_type = BFD_RELOC_390_PC12DBL; 2288 } 2289 else if (operand->bits == 16 && operand->shift == 16) 2290 { 2291 fixP->fx_size = 2; 2292 fixP->fx_where += 2; 2293 if (operand->flags & S390_OPERAND_PCREL) 2294 { 2295 fixP->fx_r_type = BFD_RELOC_390_PC16DBL; 2296 fixP->fx_offset += 2; 2297 } 2298 else 2299 fixP->fx_r_type = BFD_RELOC_16; 2300 } 2301 else if (operand->bits == 24 && operand->shift == 24 2302 && (operand->flags & S390_OPERAND_PCREL)) 2303 { 2304 fixP->fx_size = 3; 2305 fixP->fx_where += 3; 2306 fixP->fx_offset += 3; 2307 fixP->fx_r_type = BFD_RELOC_390_PC24DBL; 2308 } 2309 else if (operand->bits == 32 && operand->shift == 16 2310 && (operand->flags & S390_OPERAND_PCREL)) 2311 { 2312 fixP->fx_size = 4; 2313 fixP->fx_where += 2; 2314 fixP->fx_offset += 2; 2315 fixP->fx_r_type = BFD_RELOC_390_PC32DBL; 2316 } 2317 else 2318 { 2319 const char *sfile; 2320 unsigned int sline; 2321 2322 /* Use expr_symbol_where to see if this is an expression 2323 symbol. */ 2324 if (expr_symbol_where (fixP->fx_addsy, &sfile, &sline)) 2325 as_bad_where (fixP->fx_file, fixP->fx_line, 2326 _("unresolved expression that must be resolved")); 2327 else 2328 as_bad_where (fixP->fx_file, fixP->fx_line, 2329 _("unsupported relocation type")); 2330 fixP->fx_done = 1; 2331 return; 2332 } 2333 } 2334 else 2335 { 2336 switch (fixP->fx_r_type) 2337 { 2338 case BFD_RELOC_8: 2339 if (fixP->fx_pcrel) 2340 abort (); 2341 if (fixP->fx_done) 2342 md_number_to_chars (where, value, 1); 2343 break; 2344 case BFD_RELOC_390_12: 2345 case BFD_RELOC_390_GOT12: 2346 case BFD_RELOC_390_GOTPLT12: 2347 case BFD_RELOC_390_PC12DBL: 2348 case BFD_RELOC_390_PLT12DBL: 2349 if (fixP->fx_pcrel) 2350 value++; 2351 2352 if (fixP->fx_done) 2353 { 2354 unsigned short mop; 2355 2356 if (fixP->fx_pcrel) 2357 value >>= 1; 2358 2359 mop = bfd_getb16 ((unsigned char *) where); 2360 mop |= (unsigned short) (value & 0xfff); 2361 bfd_putb16 ((bfd_vma) mop, (unsigned char *) where); 2362 } 2363 break; 2364 2365 case BFD_RELOC_390_20: 2366 case BFD_RELOC_390_GOT20: 2367 case BFD_RELOC_390_GOTPLT20: 2368 if (fixP->fx_done) 2369 { 2370 unsigned int mop; 2371 mop = bfd_getb32 ((unsigned char *) where); 2372 mop |= (unsigned int) ((value & 0xfff) << 8 | 2373 (value & 0xff000) >> 12); 2374 bfd_putb32 ((bfd_vma) mop, (unsigned char *) where); 2375 } 2376 break; 2377 2378 case BFD_RELOC_16: 2379 case BFD_RELOC_GPREL16: 2380 case BFD_RELOC_16_GOT_PCREL: 2381 case BFD_RELOC_16_GOTOFF: 2382 if (fixP->fx_pcrel) 2383 as_bad_where (fixP->fx_file, fixP->fx_line, 2384 _("cannot emit PC relative %s relocation%s%s"), 2385 bfd_get_reloc_code_name (fixP->fx_r_type), 2386 fixP->fx_addsy != NULL ? " against " : "", 2387 (fixP->fx_addsy != NULL 2388 ? S_GET_NAME (fixP->fx_addsy) 2389 : "")); 2390 if (fixP->fx_done) 2391 md_number_to_chars (where, value, 2); 2392 break; 2393 case BFD_RELOC_390_GOT16: 2394 case BFD_RELOC_390_PLTOFF16: 2395 case BFD_RELOC_390_GOTPLT16: 2396 if (fixP->fx_done) 2397 md_number_to_chars (where, value, 2); 2398 break; 2399 case BFD_RELOC_390_PC16DBL: 2400 case BFD_RELOC_390_PLT16DBL: 2401 value += 2; 2402 if (fixP->fx_done) 2403 md_number_to_chars (where, (offsetT) value >> 1, 2); 2404 break; 2405 2406 case BFD_RELOC_390_PC24DBL: 2407 case BFD_RELOC_390_PLT24DBL: 2408 value += 3; 2409 if (fixP->fx_done) 2410 { 2411 unsigned int mop; 2412 value >>= 1; 2413 2414 mop = bfd_getb32 ((unsigned char *) where - 1); 2415 mop |= (unsigned int) (value & 0xffffff); 2416 bfd_putb32 ((bfd_vma) mop, (unsigned char *) where - 1); 2417 } 2418 break; 2419 2420 case BFD_RELOC_32: 2421 if (fixP->fx_pcrel) 2422 fixP->fx_r_type = BFD_RELOC_32_PCREL; 2423 else 2424 fixP->fx_r_type = BFD_RELOC_32; 2425 if (fixP->fx_done) 2426 md_number_to_chars (where, value, 4); 2427 break; 2428 case BFD_RELOC_32_PCREL: 2429 case BFD_RELOC_32_BASEREL: 2430 fixP->fx_r_type = BFD_RELOC_32_PCREL; 2431 if (fixP->fx_done) 2432 md_number_to_chars (where, value, 4); 2433 break; 2434 case BFD_RELOC_32_GOT_PCREL: 2435 case BFD_RELOC_390_PLTOFF32: 2436 case BFD_RELOC_390_PLT32: 2437 case BFD_RELOC_390_GOTPLT32: 2438 if (fixP->fx_done) 2439 md_number_to_chars (where, value, 4); 2440 break; 2441 case BFD_RELOC_390_PC32DBL: 2442 case BFD_RELOC_390_PLT32DBL: 2443 case BFD_RELOC_390_GOTPCDBL: 2444 case BFD_RELOC_390_GOTENT: 2445 case BFD_RELOC_390_GOTPLTENT: 2446 value += 2; 2447 if (fixP->fx_done) 2448 md_number_to_chars (where, (offsetT) value >> 1, 4); 2449 break; 2450 2451 case BFD_RELOC_32_GOTOFF: 2452 if (fixP->fx_done) 2453 md_number_to_chars (where, value, sizeof (int)); 2454 break; 2455 2456 case BFD_RELOC_390_GOTOFF64: 2457 if (fixP->fx_done) 2458 md_number_to_chars (where, value, 8); 2459 break; 2460 2461 case BFD_RELOC_390_GOT64: 2462 case BFD_RELOC_390_PLTOFF64: 2463 case BFD_RELOC_390_PLT64: 2464 case BFD_RELOC_390_GOTPLT64: 2465 if (fixP->fx_done) 2466 md_number_to_chars (where, value, 8); 2467 break; 2468 2469 case BFD_RELOC_64: 2470 if (fixP->fx_pcrel) 2471 fixP->fx_r_type = BFD_RELOC_64_PCREL; 2472 else 2473 fixP->fx_r_type = BFD_RELOC_64; 2474 if (fixP->fx_done) 2475 md_number_to_chars (where, value, 8); 2476 break; 2477 2478 case BFD_RELOC_64_PCREL: 2479 fixP->fx_r_type = BFD_RELOC_64_PCREL; 2480 if (fixP->fx_done) 2481 md_number_to_chars (where, value, 8); 2482 break; 2483 2484 case BFD_RELOC_VTABLE_INHERIT: 2485 case BFD_RELOC_VTABLE_ENTRY: 2486 fixP->fx_done = 0; 2487 return; 2488 2489 case BFD_RELOC_390_TLS_LOAD: 2490 case BFD_RELOC_390_TLS_GDCALL: 2491 case BFD_RELOC_390_TLS_LDCALL: 2492 case BFD_RELOC_390_TLS_GD32: 2493 case BFD_RELOC_390_TLS_GD64: 2494 case BFD_RELOC_390_TLS_GOTIE12: 2495 case BFD_RELOC_390_TLS_GOTIE20: 2496 case BFD_RELOC_390_TLS_GOTIE32: 2497 case BFD_RELOC_390_TLS_GOTIE64: 2498 case BFD_RELOC_390_TLS_LDM32: 2499 case BFD_RELOC_390_TLS_LDM64: 2500 case BFD_RELOC_390_TLS_IE32: 2501 case BFD_RELOC_390_TLS_IE64: 2502 case BFD_RELOC_390_TLS_LE32: 2503 case BFD_RELOC_390_TLS_LE64: 2504 case BFD_RELOC_390_TLS_LDO32: 2505 case BFD_RELOC_390_TLS_LDO64: 2506 case BFD_RELOC_390_TLS_DTPMOD: 2507 case BFD_RELOC_390_TLS_DTPOFF: 2508 case BFD_RELOC_390_TLS_TPOFF: 2509 S_SET_THREAD_LOCAL (fixP->fx_addsy); 2510 /* Fully resolved at link time. */ 2511 break; 2512 case BFD_RELOC_390_TLS_IEENT: 2513 /* Fully resolved at link time. */ 2514 S_SET_THREAD_LOCAL (fixP->fx_addsy); 2515 value += 2; 2516 break; 2517 2518 default: 2519 { 2520 const char *reloc_name = bfd_get_reloc_code_name (fixP->fx_r_type); 2521 2522 if (reloc_name != NULL) 2523 as_fatal (_("Gas failure, reloc type %s\n"), reloc_name); 2524 else 2525 as_fatal (_("Gas failure, reloc type #%i\n"), fixP->fx_r_type); 2526 } 2527 } 2528 2529 fixP->fx_offset = value; 2530 } 2531 } 2532 2533 /* Generate a reloc for a fixup. */ 2534 2535 arelent * 2536 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp) 2537 { 2538 bfd_reloc_code_real_type code; 2539 arelent *reloc; 2540 2541 code = fixp->fx_r_type; 2542 if (GOT_symbol && fixp->fx_addsy == GOT_symbol) 2543 { 2544 if ( (s390_arch_size == 32 && code == BFD_RELOC_32_PCREL) 2545 || (s390_arch_size == 64 && code == BFD_RELOC_64_PCREL)) 2546 code = BFD_RELOC_390_GOTPC; 2547 if (code == BFD_RELOC_390_PC32DBL) 2548 code = BFD_RELOC_390_GOTPCDBL; 2549 } 2550 2551 reloc = XNEW (arelent); 2552 reloc->sym_ptr_ptr = XNEW (asymbol *); 2553 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); 2554 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; 2555 reloc->howto = bfd_reloc_type_lookup (stdoutput, code); 2556 if (reloc->howto == NULL) 2557 { 2558 as_bad_where (fixp->fx_file, fixp->fx_line, 2559 _("cannot represent relocation type %s"), 2560 bfd_get_reloc_code_name (code)); 2561 /* Set howto to a garbage value so that we can keep going. */ 2562 reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); 2563 gas_assert (reloc->howto != NULL); 2564 } 2565 reloc->addend = fixp->fx_offset; 2566 2567 return reloc; 2568 } 2569 2570 void 2571 s390_cfi_frame_initial_instructions (void) 2572 { 2573 cfi_add_CFA_def_cfa (15, s390_arch_size == 64 ? 160 : 96); 2574 } 2575 2576 int 2577 tc_s390_regname_to_dw2regnum (char *regname) 2578 { 2579 int regnum = -1; 2580 2581 if (regname[0] != 'c' && regname[0] != 'a') 2582 { 2583 regnum = reg_name_search (regname); 2584 if (regname[0] == 'f' && regnum != -1) 2585 regnum += 16; 2586 } 2587 else if (strcmp (regname, "ap") == 0) 2588 regnum = 32; 2589 else if (strcmp (regname, "cc") == 0) 2590 regnum = 33; 2591 return regnum; 2592 } 2593 2594 void 2595 s390_elf_final_processing (void) 2596 { 2597 if (set_highgprs_p) 2598 elf_elfheader (stdoutput)->e_flags |= EF_S390_HIGH_GPRS; 2599 } 2600