| 1 | /* tc-s390.c -- Assemble for the S390 |
| 2 | Copyright 2000, 2001 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 2, 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, 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include "as.h" |
| 24 | #include "safe-ctype.h" |
| 25 | #include "subsegs.h" |
| 26 | #include "struc-symbol.h" |
| 27 | |
| 28 | #include "opcode/s390.h" |
| 29 | #include "elf/s390.h" |
| 30 | |
| 31 | /* The default architecture */ |
| 32 | #ifndef DEFAULT_ARCH |
| 33 | #define DEFAULT_ARCH "s390" |
| 34 | #endif |
| 35 | static char *default_arch = DEFAULT_ARCH; |
| 36 | /* Either 32 or 64, selects file format. */ |
| 37 | static int s390_arch_size; |
| 38 | /* Current architecture. Start with the smallest instruction set */ |
| 39 | static enum s390_opcode_arch_val current_architecture = S390_OPCODE_ESA; |
| 40 | static int current_arch_mask = 1 << S390_OPCODE_ESA; |
| 41 | static int current_arch_requested = 0; |
| 42 | |
| 43 | /* Whether to use user friendly register names. Default is true. */ |
| 44 | #ifndef TARGET_REG_NAMES_P |
| 45 | #define TARGET_REG_NAMES_P true |
| 46 | #endif |
| 47 | |
| 48 | static boolean reg_names_p = TARGET_REG_NAMES_P; |
| 49 | |
| 50 | /* Generic assembler global variables which must be defined by all |
| 51 | targets. */ |
| 52 | |
| 53 | const char comment_chars[] = "#"; |
| 54 | |
| 55 | /* Characters which start a comment at the beginning of a line. */ |
| 56 | const char line_comment_chars[] = "#"; |
| 57 | |
| 58 | /* Characters which may be used to separate multiple commands on a |
| 59 | single line. */ |
| 60 | const char line_separator_chars[] = ";"; |
| 61 | |
| 62 | /* Characters which are used to indicate an exponent in a floating |
| 63 | point number. */ |
| 64 | const char EXP_CHARS[] = "eE"; |
| 65 | |
| 66 | /* Characters which mean that a number is a floating point constant, |
| 67 | as in 0d1.0. */ |
| 68 | const char FLT_CHARS[] = "dD"; |
| 69 | |
| 70 | /* The target specific pseudo-ops which we support. */ |
| 71 | |
| 72 | /* Define the prototypes for the pseudo-ops */ |
| 73 | static void s390_byte PARAMS ((int)); |
| 74 | static void s390_elf_cons PARAMS ((int)); |
| 75 | static void s390_bss PARAMS ((int)); |
| 76 | static void s390_insn PARAMS ((int)); |
| 77 | static void s390_literals PARAMS ((int)); |
| 78 | |
| 79 | const pseudo_typeS md_pseudo_table[] = |
| 80 | { |
| 81 | { "align", s_align_bytes, 0 }, |
| 82 | /* Pseudo-ops which must be defined. */ |
| 83 | { "bss", s390_bss, 0 }, |
| 84 | { "insn", s390_insn, 0 }, |
| 85 | /* Pseudo-ops which must be overridden. */ |
| 86 | { "byte", s390_byte, 0 }, |
| 87 | { "short", s390_elf_cons, 2 }, |
| 88 | { "long", s390_elf_cons, 4 }, |
| 89 | { "quad", s390_elf_cons, 8 }, |
| 90 | { "ltorg", s390_literals, 0 }, |
| 91 | { "string", stringer, 2 }, |
| 92 | { NULL, NULL, 0 } |
| 93 | }; |
| 94 | |
| 95 | |
| 96 | /* Structure to hold information about predefined registers. */ |
| 97 | struct pd_reg |
| 98 | { |
| 99 | char *name; |
| 100 | int value; |
| 101 | }; |
| 102 | |
| 103 | /* List of registers that are pre-defined: |
| 104 | |
| 105 | Each access register has a predefined name of the form: |
| 106 | a<reg_num> which has the value <reg_num>. |
| 107 | |
| 108 | Each control register has a predefined name of the form: |
| 109 | c<reg_num> which has the value <reg_num>. |
| 110 | |
| 111 | Each general register has a predefined name of the form: |
| 112 | r<reg_num> which has the value <reg_num>. |
| 113 | |
| 114 | Each floating point register a has predefined name of the form: |
| 115 | f<reg_num> which has the value <reg_num>. |
| 116 | |
| 117 | There are individual registers as well: |
| 118 | sp has the value 15 |
| 119 | lit has the value 12 |
| 120 | |
| 121 | The table is sorted. Suitable for searching by a binary search. */ |
| 122 | |
| 123 | static const struct pd_reg pre_defined_registers[] = |
| 124 | { |
| 125 | { "a0", 0 }, /* Access registers */ |
| 126 | { "a1", 1 }, |
| 127 | { "a10", 10 }, |
| 128 | { "a11", 11 }, |
| 129 | { "a12", 12 }, |
| 130 | { "a13", 13 }, |
| 131 | { "a14", 14 }, |
| 132 | { "a15", 15 }, |
| 133 | { "a2", 2 }, |
| 134 | { "a3", 3 }, |
| 135 | { "a4", 4 }, |
| 136 | { "a5", 5 }, |
| 137 | { "a6", 6 }, |
| 138 | { "a7", 7 }, |
| 139 | { "a8", 8 }, |
| 140 | { "a9", 9 }, |
| 141 | |
| 142 | { "c0", 0 }, /* Control registers */ |
| 143 | { "c1", 1 }, |
| 144 | { "c10", 10 }, |
| 145 | { "c11", 11 }, |
| 146 | { "c12", 12 }, |
| 147 | { "c13", 13 }, |
| 148 | { "c14", 14 }, |
| 149 | { "c15", 15 }, |
| 150 | { "c2", 2 }, |
| 151 | { "c3", 3 }, |
| 152 | { "c4", 4 }, |
| 153 | { "c5", 5 }, |
| 154 | { "c6", 6 }, |
| 155 | { "c7", 7 }, |
| 156 | { "c8", 8 }, |
| 157 | { "c9", 9 }, |
| 158 | |
| 159 | { "f0", 0 }, /* Floating point registers */ |
| 160 | { "f1", 1 }, |
| 161 | { "f10", 10 }, |
| 162 | { "f11", 11 }, |
| 163 | { "f12", 12 }, |
| 164 | { "f13", 13 }, |
| 165 | { "f14", 14 }, |
| 166 | { "f15", 15 }, |
| 167 | { "f2", 2 }, |
| 168 | { "f3", 3 }, |
| 169 | { "f4", 4 }, |
| 170 | { "f5", 5 }, |
| 171 | { "f6", 6 }, |
| 172 | { "f7", 7 }, |
| 173 | { "f8", 8 }, |
| 174 | { "f9", 9 }, |
| 175 | |
| 176 | { "lit", 13 }, /* Pointer to literal pool */ |
| 177 | |
| 178 | { "r0", 0 }, /* General purpose registers */ |
| 179 | { "r1", 1 }, |
| 180 | { "r10", 10 }, |
| 181 | { "r11", 11 }, |
| 182 | { "r12", 12 }, |
| 183 | { "r13", 13 }, |
| 184 | { "r14", 14 }, |
| 185 | { "r15", 15 }, |
| 186 | { "r2", 2 }, |
| 187 | { "r3", 3 }, |
| 188 | { "r4", 4 }, |
| 189 | { "r5", 5 }, |
| 190 | { "r6", 6 }, |
| 191 | { "r7", 7 }, |
| 192 | { "r8", 8 }, |
| 193 | { "r9", 9 }, |
| 194 | |
| 195 | { "sp", 15 }, /* Stack pointer */ |
| 196 | |
| 197 | }; |
| 198 | |
| 199 | #define REG_NAME_CNT (sizeof (pre_defined_registers) / sizeof (struct pd_reg)) |
| 200 | |
| 201 | static int reg_name_search |
| 202 | PARAMS ((const struct pd_reg *, int, const char *)); |
| 203 | static boolean register_name PARAMS ((expressionS *)); |
| 204 | static void init_default_arch PARAMS ((void)); |
| 205 | static void s390_insert_operand |
| 206 | PARAMS ((unsigned char *, const struct s390_operand *, offsetT, char *, |
| 207 | unsigned int)); |
| 208 | static char *md_gather_operands |
| 209 | PARAMS ((char *, unsigned char *, const struct s390_opcode *)); |
| 210 | |
| 211 | /* Given NAME, find the register number associated with that name, return |
| 212 | the integer value associated with the given name or -1 on failure. */ |
| 213 | |
| 214 | static int |
| 215 | reg_name_search (regs, regcount, name) |
| 216 | const struct pd_reg *regs; |
| 217 | int regcount; |
| 218 | const char *name; |
| 219 | { |
| 220 | int middle, low, high; |
| 221 | int cmp; |
| 222 | |
| 223 | low = 0; |
| 224 | high = regcount - 1; |
| 225 | |
| 226 | do |
| 227 | { |
| 228 | middle = (low + high) / 2; |
| 229 | cmp = strcasecmp (name, regs[middle].name); |
| 230 | if (cmp < 0) |
| 231 | high = middle - 1; |
| 232 | else if (cmp > 0) |
| 233 | low = middle + 1; |
| 234 | else |
| 235 | return regs[middle].value; |
| 236 | } |
| 237 | while (low <= high); |
| 238 | |
| 239 | return -1; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | /* |
| 244 | * Summary of register_name(). |
| 245 | * |
| 246 | * in: Input_line_pointer points to 1st char of operand. |
| 247 | * |
| 248 | * out: A expressionS. |
| 249 | * The operand may have been a register: in this case, X_op == O_register, |
| 250 | * X_add_number is set to the register number, and truth is returned. |
| 251 | * Input_line_pointer->(next non-blank) char after operand, or is in its |
| 252 | * original state. |
| 253 | */ |
| 254 | |
| 255 | static boolean |
| 256 | register_name (expressionP) |
| 257 | expressionS *expressionP; |
| 258 | { |
| 259 | int reg_number; |
| 260 | char *name; |
| 261 | char *start; |
| 262 | char c; |
| 263 | |
| 264 | /* Find the spelling of the operand. */ |
| 265 | start = name = input_line_pointer; |
| 266 | if (name[0] == '%' && ISALPHA (name[1])) |
| 267 | name = ++input_line_pointer; |
| 268 | else |
| 269 | return false; |
| 270 | |
| 271 | c = get_symbol_end (); |
| 272 | reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); |
| 273 | |
| 274 | /* Put back the delimiting char. */ |
| 275 | *input_line_pointer = c; |
| 276 | |
| 277 | /* Look to see if it's in the register table. */ |
| 278 | if (reg_number >= 0) |
| 279 | { |
| 280 | expressionP->X_op = O_register; |
| 281 | expressionP->X_add_number = reg_number; |
| 282 | |
| 283 | /* Make the rest nice. */ |
| 284 | expressionP->X_add_symbol = NULL; |
| 285 | expressionP->X_op_symbol = NULL; |
| 286 | return true; |
| 287 | } |
| 288 | |
| 289 | /* Reset the line as if we had not done anything. */ |
| 290 | input_line_pointer = start; |
| 291 | return false; |
| 292 | } |
| 293 | |
| 294 | /* Local variables. */ |
| 295 | |
| 296 | /* Opformat hash table. */ |
| 297 | static struct hash_control *s390_opformat_hash; |
| 298 | |
| 299 | /* Opcode hash table. */ |
| 300 | static struct hash_control *s390_opcode_hash; |
| 301 | |
| 302 | /* Flags to set in the elf header */ |
| 303 | static flagword s390_flags = 0; |
| 304 | |
| 305 | symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ |
| 306 | |
| 307 | #ifndef WORKING_DOT_WORD |
| 308 | const int md_short_jump_size = 4; |
| 309 | const int md_long_jump_size = 4; |
| 310 | #endif |
| 311 | |
| 312 | CONST char *md_shortopts = "A:m:kVQ:"; |
| 313 | struct option md_longopts[] = { |
| 314 | {NULL, no_argument, NULL, 0} |
| 315 | }; |
| 316 | size_t md_longopts_size = sizeof (md_longopts); |
| 317 | |
| 318 | /* Initialize the default opcode arch and word size from the default |
| 319 | architecture name. */ |
| 320 | static void |
| 321 | init_default_arch () |
| 322 | { |
| 323 | if (current_arch_requested) |
| 324 | return; |
| 325 | |
| 326 | if (strcmp (default_arch, "s390") == 0) |
| 327 | { |
| 328 | s390_arch_size = 32; |
| 329 | current_architecture = S390_OPCODE_ESA; |
| 330 | } |
| 331 | else if (strcmp (default_arch, "s390x") == 0) |
| 332 | { |
| 333 | s390_arch_size = 64; |
| 334 | current_architecture = S390_OPCODE_ESAME; |
| 335 | } |
| 336 | else |
| 337 | as_fatal ("Invalid default architecture, broken assembler."); |
| 338 | current_arch_mask = 1 << current_architecture; |
| 339 | } |
| 340 | |
| 341 | /* Called by TARGET_FORMAT. */ |
| 342 | const char * |
| 343 | s390_target_format () |
| 344 | { |
| 345 | /* We don't get a chance to initialize anything before we're called, |
| 346 | so handle that now. */ |
| 347 | if (! s390_arch_size) |
| 348 | init_default_arch (); |
| 349 | |
| 350 | return s390_arch_size == 64 ? "elf64-s390" : "elf32-s390"; |
| 351 | } |
| 352 | |
| 353 | int |
| 354 | md_parse_option (c, arg) |
| 355 | int c; |
| 356 | char *arg; |
| 357 | { |
| 358 | switch (c) |
| 359 | { |
| 360 | /* -k: Ignore for FreeBSD compatibility. */ |
| 361 | case 'k': |
| 362 | break; |
| 363 | case 'm': |
| 364 | if (arg != NULL && strcmp (arg, "regnames") == 0) |
| 365 | reg_names_p = true; |
| 366 | |
| 367 | else if (arg != NULL && strcmp (arg, "no-regnames") == 0) |
| 368 | reg_names_p = false; |
| 369 | |
| 370 | else |
| 371 | { |
| 372 | as_bad (_("invalid switch -m%s"), arg); |
| 373 | return 0; |
| 374 | } |
| 375 | break; |
| 376 | |
| 377 | case 'A': |
| 378 | if (arg != NULL && strcmp (arg, "esa") == 0) |
| 379 | { |
| 380 | current_architecture = S390_OPCODE_ESA; |
| 381 | s390_arch_size = 32; |
| 382 | } |
| 383 | else if (arg != NULL && strcmp (arg, "esame") == 0) |
| 384 | { |
| 385 | current_architecture = S390_OPCODE_ESAME; |
| 386 | s390_arch_size = 64; |
| 387 | } |
| 388 | else |
| 389 | as_bad ("invalid architecture -A%s", arg); |
| 390 | current_arch_mask = 1 << current_architecture; |
| 391 | current_arch_requested = 1; |
| 392 | break; |
| 393 | |
| 394 | /* -V: SVR4 argument to print version ID. */ |
| 395 | case 'V': |
| 396 | print_version_id (); |
| 397 | break; |
| 398 | |
| 399 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section |
| 400 | should be emitted or not. FIXME: Not implemented. */ |
| 401 | case 'Q': |
| 402 | break; |
| 403 | |
| 404 | default: |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | return 1; |
| 409 | } |
| 410 | |
| 411 | void |
| 412 | md_show_usage (stream) |
| 413 | FILE *stream; |
| 414 | { |
| 415 | fprintf (stream, _("\ |
| 416 | S390 options:\n\ |
| 417 | -mregnames \tAllow symbolic names for registers\n\ |
| 418 | -mno-regnames\tDo not allow symbolic names for registers\n")); |
| 419 | fprintf (stream, _("\ |
| 420 | -V \tprint assembler version number\n\ |
| 421 | -Qy, -Qn \tignored\n")); |
| 422 | } |
| 423 | |
| 424 | /* This function is called when the assembler starts up. It is called |
| 425 | after the options have been parsed and the output file has been |
| 426 | opened. */ |
| 427 | |
| 428 | void |
| 429 | md_begin () |
| 430 | { |
| 431 | register const struct s390_opcode *op; |
| 432 | const struct s390_opcode *op_end; |
| 433 | boolean dup_insn = false; |
| 434 | const char *retval; |
| 435 | |
| 436 | /* Set the ELF flags if desired. */ |
| 437 | if (s390_flags) |
| 438 | bfd_set_private_flags (stdoutput, s390_flags); |
| 439 | |
| 440 | /* Insert the opcode formats into a hash table. */ |
| 441 | s390_opformat_hash = hash_new (); |
| 442 | |
| 443 | op_end = s390_opformats + s390_num_opformats; |
| 444 | for (op = s390_opformats; op < op_end; op++) |
| 445 | { |
| 446 | retval = hash_insert (s390_opformat_hash, op->name, (PTR) op); |
| 447 | if (retval != (const char *) NULL) |
| 448 | { |
| 449 | as_bad (_("Internal assembler error for instruction format %s"), |
| 450 | op->name); |
| 451 | dup_insn = true; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | /* Insert the opcodes into a hash table. */ |
| 456 | s390_opcode_hash = hash_new (); |
| 457 | |
| 458 | op_end = s390_opcodes + s390_num_opcodes; |
| 459 | for (op = s390_opcodes; op < op_end; op++) |
| 460 | { |
| 461 | retval = hash_insert (s390_opcode_hash, op->name, (PTR) op); |
| 462 | if (retval != (const char *) NULL) |
| 463 | { |
| 464 | as_bad (_("Internal assembler error for instruction %s"), op->name); |
| 465 | dup_insn = true; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | if (dup_insn) |
| 470 | abort (); |
| 471 | |
| 472 | record_alignment (text_section, 2); |
| 473 | record_alignment (data_section, 2); |
| 474 | record_alignment (bss_section, 2); |
| 475 | |
| 476 | } |
| 477 | |
| 478 | /* Called after all assembly has been done. */ |
| 479 | void |
| 480 | s390_md_end () |
| 481 | { |
| 482 | if (s390_arch_size == 64) |
| 483 | bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_esame); |
| 484 | else |
| 485 | bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_esa); |
| 486 | } |
| 487 | |
| 488 | void |
| 489 | s390_align_code (fragP, count) |
| 490 | fragS *fragP; |
| 491 | int count; |
| 492 | { |
| 493 | /* We use nop pattern 0x0707. */ |
| 494 | if (count > 0) |
| 495 | { |
| 496 | memset (fragP->fr_literal + fragP->fr_fix, 0x07, count); |
| 497 | fragP->fr_var = count; |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | /* Insert an operand value into an instruction. */ |
| 502 | |
| 503 | static void |
| 504 | s390_insert_operand (insn, operand, val, file, line) |
| 505 | unsigned char *insn; |
| 506 | const struct s390_operand *operand; |
| 507 | offsetT val; |
| 508 | char *file; |
| 509 | unsigned int line; |
| 510 | { |
| 511 | addressT uval; |
| 512 | int offset; |
| 513 | |
| 514 | if (operand->flags & (S390_OPERAND_SIGNED|S390_OPERAND_PCREL)) |
| 515 | { |
| 516 | offsetT min, max; |
| 517 | |
| 518 | max = ((offsetT) 1 << (operand->bits - 1)) - 1; |
| 519 | min = - ((offsetT) 1 << (operand->bits - 1)); |
| 520 | /* Halve PCREL operands. */ |
| 521 | if (operand->flags & S390_OPERAND_PCREL) |
| 522 | val >>= 1; |
| 523 | /* Check for underflow / overflow. */ |
| 524 | if (val < min || val > max) |
| 525 | { |
| 526 | const char *err = |
| 527 | "operand out of range (%s not between %ld and %ld)"; |
| 528 | char buf[100]; |
| 529 | |
| 530 | if (operand->flags & S390_OPERAND_PCREL) |
| 531 | { |
| 532 | val <<= 1; |
| 533 | min <<= 1; |
| 534 | max <<= 1; |
| 535 | } |
| 536 | sprint_value (buf, val); |
| 537 | if (file == (char *) NULL) |
| 538 | as_bad (err, buf, (int) min, (int) max); |
| 539 | else |
| 540 | as_bad_where (file, line, err, buf, (int) min, (int) max); |
| 541 | return; |
| 542 | } |
| 543 | /* val is ok, now restrict it to operand->bits bits. */ |
| 544 | uval = (addressT) val & ((((addressT) 1 << (operand->bits-1)) << 1) - 1); |
| 545 | } |
| 546 | else |
| 547 | { |
| 548 | addressT min, max; |
| 549 | |
| 550 | max = (((addressT) 1 << (operand->bits - 1))<<1) - 1; |
| 551 | min = (offsetT) 0; |
| 552 | uval = (addressT) val; |
| 553 | /* Length x in an instructions has real length x+1. */ |
| 554 | if (operand->flags & S390_OPERAND_LENGTH) |
| 555 | uval--; |
| 556 | /* Check for underflow / overflow. */ |
| 557 | if (uval < min || uval > max) |
| 558 | { |
| 559 | const char *err = |
| 560 | "operand out of range (%s not between %ld and %ld)"; |
| 561 | char buf[100]; |
| 562 | |
| 563 | if (operand->flags & S390_OPERAND_LENGTH) |
| 564 | { |
| 565 | uval++; |
| 566 | min++; |
| 567 | max++; |
| 568 | } |
| 569 | sprint_value (buf, uval); |
| 570 | if (file == (char *) NULL) |
| 571 | as_bad (err, buf, (int) min, (int) max); |
| 572 | else |
| 573 | as_bad_where (file, line, err, buf, (int) min, (int) max); |
| 574 | return; |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* Insert fragments of the operand byte for byte. */ |
| 579 | offset = operand->shift + operand->bits; |
| 580 | uval <<= (-offset) & 7; |
| 581 | insn += (offset - 1)/8; |
| 582 | while (uval != 0) |
| 583 | { |
| 584 | *insn-- |= uval; |
| 585 | uval >>= 8; |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | /* Structure used to hold suffixes. */ |
| 590 | typedef enum |
| 591 | { |
| 592 | ELF_SUFFIX_NONE = 0, |
| 593 | ELF_SUFFIX_GOT, |
| 594 | ELF_SUFFIX_PLT, |
| 595 | ELF_SUFFIX_GOTENT |
| 596 | } |
| 597 | elf_suffix_type; |
| 598 | |
| 599 | struct map_bfd |
| 600 | { |
| 601 | char *string; |
| 602 | int length; |
| 603 | elf_suffix_type suffix; |
| 604 | }; |
| 605 | |
| 606 | static elf_suffix_type s390_elf_suffix PARAMS ((char **, expressionS *)); |
| 607 | static int s390_exp_compare PARAMS ((expressionS *exp1, expressionS *exp2)); |
| 608 | static elf_suffix_type s390_lit_suffix |
| 609 | PARAMS ((char **, expressionS *, elf_suffix_type)); |
| 610 | |
| 611 | |
| 612 | /* Parse @got/@plt/@gotoff. and return the desired relocation. */ |
| 613 | static elf_suffix_type |
| 614 | s390_elf_suffix (str_p, exp_p) |
| 615 | char **str_p; |
| 616 | expressionS *exp_p; |
| 617 | { |
| 618 | static struct map_bfd mapping[] = |
| 619 | { |
| 620 | { "got", 3, ELF_SUFFIX_GOT }, |
| 621 | { "got12", 5, ELF_SUFFIX_GOT }, |
| 622 | { "plt", 3, ELF_SUFFIX_PLT }, |
| 623 | { "gotent", 6, ELF_SUFFIX_GOTENT }, |
| 624 | { NULL, 0, ELF_SUFFIX_NONE } |
| 625 | }; |
| 626 | |
| 627 | struct map_bfd *ptr; |
| 628 | char *str = *str_p; |
| 629 | char *ident; |
| 630 | int len; |
| 631 | |
| 632 | if (*str++ != '@') |
| 633 | return ELF_SUFFIX_NONE; |
| 634 | |
| 635 | ident = str; |
| 636 | while (ISALNUM (*str)) |
| 637 | str++; |
| 638 | len = str - ident; |
| 639 | |
| 640 | for (ptr = &mapping[0]; ptr->length > 0; ptr++) |
| 641 | if (len == ptr->length && |
| 642 | strncasecmp (ident, ptr->string, ptr->length) == 0) |
| 643 | { |
| 644 | if (exp_p->X_add_number != 0) |
| 645 | as_warn (_("identifier+constant@%s means identifier@%s+constant"), |
| 646 | ptr->string, ptr->string); |
| 647 | /* Now check for identifier@suffix+constant. */ |
| 648 | if (*str == '-' || *str == '+') |
| 649 | { |
| 650 | char *orig_line = input_line_pointer; |
| 651 | expressionS new_exp; |
| 652 | |
| 653 | input_line_pointer = str; |
| 654 | expression (&new_exp); |
| 655 | |
| 656 | switch (new_exp.X_op) |
| 657 | { |
| 658 | case O_constant: /* X_add_number (a constant expression). */ |
| 659 | exp_p->X_add_number += new_exp.X_add_number; |
| 660 | str = input_line_pointer; |
| 661 | break; |
| 662 | case O_symbol: /* X_add_symbol + X_add_number. */ |
| 663 | /* this case is used for e.g. xyz@PLT+.Label. */ |
| 664 | exp_p->X_add_number += new_exp.X_add_number; |
| 665 | exp_p->X_op_symbol = new_exp.X_add_symbol; |
| 666 | exp_p->X_op = O_add; |
| 667 | str = input_line_pointer; |
| 668 | break; |
| 669 | case O_uminus: /* (- X_add_symbol) + X_add_number. */ |
| 670 | /* this case is used for e.g. xyz@PLT-.Label. */ |
| 671 | exp_p->X_add_number += new_exp.X_add_number; |
| 672 | exp_p->X_op_symbol = new_exp.X_add_symbol; |
| 673 | exp_p->X_op = O_subtract; |
| 674 | str = input_line_pointer; |
| 675 | break; |
| 676 | default: |
| 677 | break; |
| 678 | } |
| 679 | |
| 680 | /* If s390_elf_suffix has not been called with |
| 681 | &input_line_pointer as first parameter, we have |
| 682 | clobbered the input_line_pointer. We have to |
| 683 | undo that. */ |
| 684 | if (&input_line_pointer != str_p) |
| 685 | input_line_pointer = orig_line; |
| 686 | } |
| 687 | *str_p = str; |
| 688 | return ptr->suffix; |
| 689 | } |
| 690 | |
| 691 | return BFD_RELOC_UNUSED; |
| 692 | } |
| 693 | |
| 694 | /* Structure used to hold a literal pool entry. */ |
| 695 | struct s390_lpe |
| 696 | { |
| 697 | struct s390_lpe *next; |
| 698 | expressionS ex; |
| 699 | FLONUM_TYPE floatnum; /* used if X_op == O_big && X_add_number <= 0 */ |
| 700 | LITTLENUM_TYPE bignum[4]; /* used if X_op == O_big && X_add_number > 0 */ |
| 701 | int nbytes; |
| 702 | bfd_reloc_code_real_type reloc; |
| 703 | symbolS *sym; |
| 704 | }; |
| 705 | |
| 706 | static struct s390_lpe *lpe_free_list = NULL; |
| 707 | static struct s390_lpe *lpe_list = NULL; |
| 708 | static struct s390_lpe *lpe_list_tail = NULL; |
| 709 | static symbolS *lp_sym = NULL; |
| 710 | static int lp_count = 0; |
| 711 | static int lpe_count = 0; |
| 712 | |
| 713 | static int |
| 714 | s390_exp_compare(exp1, exp2) |
| 715 | expressionS *exp1; |
| 716 | expressionS *exp2; |
| 717 | { |
| 718 | if (exp1->X_op != exp2->X_op) |
| 719 | return 0; |
| 720 | |
| 721 | switch (exp1->X_op) |
| 722 | { |
| 723 | case O_constant: /* X_add_number must be equal. */ |
| 724 | case O_register: |
| 725 | return exp1->X_add_number == exp2->X_add_number; |
| 726 | |
| 727 | case O_big: |
| 728 | as_bad (_("Can't handle O_big in s390_exp_compare")); |
| 729 | |
| 730 | case O_symbol: /* X_add_symbol & X_add_number must be equal. */ |
| 731 | case O_symbol_rva: |
| 732 | case O_uminus: |
| 733 | case O_bit_not: |
| 734 | case O_logical_not: |
| 735 | return (exp1->X_add_symbol == exp2->X_add_symbol) && |
| 736 | (exp1->X_add_number == exp2->X_add_number); |
| 737 | |
| 738 | case O_multiply: /* X_add_symbol,X_op_symbol&X_add_number must be equal. */ |
| 739 | case O_divide: |
| 740 | case O_modulus: |
| 741 | case O_left_shift: |
| 742 | case O_right_shift: |
| 743 | case O_bit_inclusive_or: |
| 744 | case O_bit_or_not: |
| 745 | case O_bit_exclusive_or: |
| 746 | case O_bit_and: |
| 747 | case O_add: |
| 748 | case O_subtract: |
| 749 | case O_eq: |
| 750 | case O_ne: |
| 751 | case O_lt: |
| 752 | case O_le: |
| 753 | case O_ge: |
| 754 | case O_gt: |
| 755 | case O_logical_and: |
| 756 | case O_logical_or: |
| 757 | return (exp1->X_add_symbol == exp2->X_add_symbol) && |
| 758 | (exp1->X_op_symbol == exp2->X_op_symbol) && |
| 759 | (exp1->X_add_number == exp2->X_add_number); |
| 760 | default: |
| 761 | return 0; |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | /* Test for @lit and if its present make an entry in the literal pool and |
| 766 | modify the current expression to be an offset into the literal pool. */ |
| 767 | static elf_suffix_type |
| 768 | s390_lit_suffix (str_p, exp_p, suffix) |
| 769 | char **str_p; |
| 770 | expressionS *exp_p; |
| 771 | elf_suffix_type suffix; |
| 772 | { |
| 773 | bfd_reloc_code_real_type reloc; |
| 774 | char tmp_name[64]; |
| 775 | char *str = *str_p; |
| 776 | char *ident; |
| 777 | struct s390_lpe *lpe; |
| 778 | int nbytes, len; |
| 779 | |
| 780 | if (*str++ != ':') |
| 781 | return suffix; /* No modification. */ |
| 782 | |
| 783 | /* We look for a suffix of the form "@lit1", "@lit2", "@lit4" or "@lit8". */ |
| 784 | ident = str; |
| 785 | while (ISALNUM (*str)) |
| 786 | str++; |
| 787 | len = str - ident; |
| 788 | if (len != 4 || strncasecmp (ident, "lit", 3) != 0 || |
| 789 | (ident[3]!='1' && ident[3]!='2' && ident[3]!='4' && ident[3]!='8')) |
| 790 | return suffix; /* no modification */ |
| 791 | nbytes = ident[3] - '0'; |
| 792 | |
| 793 | reloc = BFD_RELOC_UNUSED; |
| 794 | if (suffix == ELF_SUFFIX_GOT) |
| 795 | { |
| 796 | if (nbytes == 2) |
| 797 | reloc = BFD_RELOC_390_GOT16; |
| 798 | else if (nbytes == 4) |
| 799 | reloc = BFD_RELOC_32_GOT_PCREL; |
| 800 | else if (nbytes == 8) |
| 801 | reloc = BFD_RELOC_390_GOT64; |
| 802 | } |
| 803 | else if (suffix == ELF_SUFFIX_PLT) |
| 804 | { |
| 805 | if (nbytes == 4) |
| 806 | reloc = BFD_RELOC_390_PLT32; |
| 807 | else if (nbytes == 8) |
| 808 | reloc = BFD_RELOC_390_PLT64; |
| 809 | } |
| 810 | |
| 811 | if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) |
| 812 | as_bad (_("Invalid suffix for literal pool entry")); |
| 813 | |
| 814 | /* Search the pool if the new entry is a duplicate. */ |
| 815 | if (exp_p->X_op == O_big) |
| 816 | { |
| 817 | /* Special processing for big numbers. */ |
| 818 | for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) |
| 819 | { |
| 820 | if (lpe->ex.X_op == O_big) |
| 821 | { |
| 822 | if (exp_p->X_add_number <= 0 && lpe->ex.X_add_number <= 0) |
| 823 | { |
| 824 | if (memcmp (&generic_floating_point_number, &lpe->floatnum, |
| 825 | sizeof (FLONUM_TYPE)) == 0) |
| 826 | break; |
| 827 | } |
| 828 | else if (exp_p->X_add_number == lpe->ex.X_add_number) |
| 829 | { |
| 830 | if (memcmp (generic_bignum, lpe->bignum, |
| 831 | sizeof (LITTLENUM_TYPE)*exp_p->X_add_number) == 0) |
| 832 | break; |
| 833 | } |
| 834 | } |
| 835 | } |
| 836 | } |
| 837 | else |
| 838 | { |
| 839 | /* Processing for 'normal' data types. */ |
| 840 | for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) |
| 841 | if (lpe->nbytes == nbytes && lpe->reloc == reloc && |
| 842 | s390_exp_compare(exp_p, &lpe->ex) != 0) |
| 843 | break; |
| 844 | } |
| 845 | |
| 846 | if (lpe == NULL) |
| 847 | { |
| 848 | /* A new literal. */ |
| 849 | if (lpe_free_list != NULL) |
| 850 | { |
| 851 | lpe = lpe_free_list; |
| 852 | lpe_free_list = lpe_free_list->next; |
| 853 | } |
| 854 | else |
| 855 | { |
| 856 | lpe = (struct s390_lpe *) xmalloc(sizeof (struct s390_lpe)); |
| 857 | } |
| 858 | |
| 859 | lpe->ex = *exp_p; |
| 860 | |
| 861 | if (exp_p->X_op == O_big) |
| 862 | { |
| 863 | if (exp_p->X_add_number <= 0) |
| 864 | lpe->floatnum = generic_floating_point_number; |
| 865 | else if (exp_p->X_add_number <= 4) |
| 866 | memcpy (lpe->bignum, generic_bignum, |
| 867 | exp_p->X_add_number*sizeof (LITTLENUM_TYPE)); |
| 868 | else |
| 869 | as_bad (_("Big number is too big")); |
| 870 | } |
| 871 | |
| 872 | lpe->nbytes = nbytes; |
| 873 | lpe->reloc = reloc; |
| 874 | /* Literal pool name defined ? */ |
| 875 | if (lp_sym == NULL) |
| 876 | { |
| 877 | sprintf (tmp_name, ".L\001%i", lp_count); |
| 878 | lp_sym = symbol_make(tmp_name); |
| 879 | } |
| 880 | |
| 881 | /* Make name for literal pool entry. */ |
| 882 | sprintf (tmp_name, ".L\001%i\002%i", lp_count, lpe_count); |
| 883 | lpe_count++; |
| 884 | lpe->sym = symbol_make(tmp_name); |
| 885 | |
| 886 | /* Add to literal pool list. */ |
| 887 | lpe->next = NULL; |
| 888 | if (lpe_list_tail != NULL) |
| 889 | { |
| 890 | lpe_list_tail->next = lpe; |
| 891 | lpe_list_tail = lpe; |
| 892 | } |
| 893 | else |
| 894 | lpe_list = lpe_list_tail = lpe; |
| 895 | } |
| 896 | |
| 897 | /* Now change exp_p to the offset into the literal pool. |
| 898 | Thats the expression: .L^Ax^By-.L^Ax */ |
| 899 | exp_p->X_add_symbol = lpe->sym; |
| 900 | exp_p->X_op_symbol = lp_sym; |
| 901 | exp_p->X_op = O_subtract; |
| 902 | exp_p->X_add_number = 0; |
| 903 | |
| 904 | *str_p = str; |
| 905 | |
| 906 | /* We change the suffix type to ELF_SUFFIX_NONE, because |
| 907 | the difference of two local labels is just a number. */ |
| 908 | return ELF_SUFFIX_NONE; |
| 909 | } |
| 910 | |
| 911 | /* Like normal .long/.short/.word, except support @got, etc. |
| 912 | clobbers input_line_pointer, checks end-of-line. */ |
| 913 | static void |
| 914 | s390_elf_cons (nbytes) |
| 915 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ |
| 916 | { |
| 917 | expressionS exp; |
| 918 | elf_suffix_type suffix; |
| 919 | |
| 920 | if (is_it_end_of_statement ()) |
| 921 | { |
| 922 | demand_empty_rest_of_line (); |
| 923 | return; |
| 924 | } |
| 925 | |
| 926 | do |
| 927 | { |
| 928 | expression (&exp); |
| 929 | |
| 930 | if (exp.X_op == O_symbol |
| 931 | && *input_line_pointer == '@' |
| 932 | && (suffix = s390_elf_suffix (&input_line_pointer, &exp)) != ELF_SUFFIX_NONE) |
| 933 | { |
| 934 | bfd_reloc_code_real_type reloc; |
| 935 | reloc_howto_type *reloc_howto; |
| 936 | int size; |
| 937 | char *where; |
| 938 | |
| 939 | if (nbytes == 2 && suffix == ELF_SUFFIX_GOT) |
| 940 | reloc = BFD_RELOC_390_GOT16; |
| 941 | else if (nbytes == 4 && suffix == ELF_SUFFIX_GOT) |
| 942 | reloc = BFD_RELOC_32_GOT_PCREL; |
| 943 | else if (nbytes == 8 && suffix == ELF_SUFFIX_GOT) |
| 944 | reloc = BFD_RELOC_390_GOT64; |
| 945 | else if (nbytes == 4 && suffix == ELF_SUFFIX_PLT) |
| 946 | reloc = BFD_RELOC_390_PLT32; |
| 947 | else if (nbytes == 8 && suffix == ELF_SUFFIX_PLT) |
| 948 | reloc = BFD_RELOC_390_PLT64; |
| 949 | else |
| 950 | reloc = BFD_RELOC_UNUSED; |
| 951 | |
| 952 | if (reloc != BFD_RELOC_UNUSED) |
| 953 | { |
| 954 | reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc); |
| 955 | size = bfd_get_reloc_size (reloc_howto); |
| 956 | if (size > nbytes) |
| 957 | as_bad (_("%s relocations do not fit in %d bytes"), |
| 958 | reloc_howto->name, nbytes); |
| 959 | where = frag_more (nbytes); |
| 960 | md_number_to_chars (where, 0, size); |
| 961 | /* To make fixup_segment do the pc relative conversion the |
| 962 | pcrel parameter on the fix_new_exp call needs to be false. */ |
| 963 | fix_new_exp (frag_now, where - frag_now->fr_literal, |
| 964 | size, &exp, false, reloc); |
| 965 | } |
| 966 | else |
| 967 | as_bad (_("relocation not applicable")); |
| 968 | } |
| 969 | else |
| 970 | emit_expr (&exp, (unsigned int) nbytes); |
| 971 | } |
| 972 | while (*input_line_pointer++ == ','); |
| 973 | |
| 974 | input_line_pointer--; /* Put terminator back into stream. */ |
| 975 | demand_empty_rest_of_line (); |
| 976 | } |
| 977 | |
| 978 | /* We need to keep a list of fixups. We can't simply generate them as |
| 979 | we go, because that would require us to first create the frag, and |
| 980 | that would screw up references to ``.''. */ |
| 981 | |
| 982 | struct s390_fixup |
| 983 | { |
| 984 | expressionS exp; |
| 985 | int opindex; |
| 986 | bfd_reloc_code_real_type reloc; |
| 987 | }; |
| 988 | |
| 989 | #define MAX_INSN_FIXUPS (4) |
| 990 | |
| 991 | /* This routine is called for each instruction to be assembled. */ |
| 992 | |
| 993 | static char * |
| 994 | md_gather_operands (str, insn, opcode) |
| 995 | char *str; |
| 996 | unsigned char *insn; |
| 997 | const struct s390_opcode *opcode; |
| 998 | { |
| 999 | struct s390_fixup fixups[MAX_INSN_FIXUPS]; |
| 1000 | const struct s390_operand *operand; |
| 1001 | const unsigned char *opindex_ptr; |
| 1002 | elf_suffix_type suffix; |
| 1003 | bfd_reloc_code_real_type reloc; |
| 1004 | int skip_optional; |
| 1005 | int parentheses; |
| 1006 | char *f; |
| 1007 | int fc, i; |
| 1008 | |
| 1009 | while (ISSPACE (*str)) str++; |
| 1010 | |
| 1011 | parentheses = 0; |
| 1012 | skip_optional = 0; |
| 1013 | |
| 1014 | /* Gather the operands. */ |
| 1015 | fc = 0; |
| 1016 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) |
| 1017 | { |
| 1018 | expressionS ex; |
| 1019 | char *hold; |
| 1020 | |
| 1021 | operand = s390_operands + *opindex_ptr; |
| 1022 | |
| 1023 | if (skip_optional && (operand->flags & S390_OPERAND_INDEX)) |
| 1024 | { |
| 1025 | /* We do an early skip. For D(X,B) constructions the index |
| 1026 | register is skipped (X is optional). For D(L,B) the base |
| 1027 | register will be the skipped operand, because L is NOT |
| 1028 | optional. */ |
| 1029 | skip_optional = 0; |
| 1030 | continue; |
| 1031 | } |
| 1032 | |
| 1033 | /* Gather the operand. */ |
| 1034 | hold = input_line_pointer; |
| 1035 | input_line_pointer = str; |
| 1036 | |
| 1037 | if (! register_name (&ex)) /* parse the operand */ |
| 1038 | expression (&ex); |
| 1039 | |
| 1040 | str = input_line_pointer; |
| 1041 | input_line_pointer = hold; |
| 1042 | |
| 1043 | /* Write the operand to the insn. */ |
| 1044 | if (ex.X_op == O_illegal) |
| 1045 | as_bad (_("illegal operand")); |
| 1046 | else if (ex.X_op == O_absent) |
| 1047 | as_bad (_("missing operand")); |
| 1048 | else if (ex.X_op == O_register || ex.X_op == O_constant) |
| 1049 | { |
| 1050 | s390_lit_suffix (&str, &ex, ELF_SUFFIX_NONE); |
| 1051 | |
| 1052 | if (ex.X_op != O_register && ex.X_op != O_constant) |
| 1053 | { |
| 1054 | /* We need to generate a fixup for the |
| 1055 | expression returned by s390_lit_suffix. */ |
| 1056 | if (fc >= MAX_INSN_FIXUPS) |
| 1057 | as_fatal (_("too many fixups")); |
| 1058 | fixups[fc].exp = ex; |
| 1059 | fixups[fc].opindex = *opindex_ptr; |
| 1060 | fixups[fc].reloc = BFD_RELOC_UNUSED; |
| 1061 | ++fc; |
| 1062 | } |
| 1063 | else |
| 1064 | { |
| 1065 | if ((operand->flags & S390_OPERAND_INDEX) && ex.X_add_number == 0) |
| 1066 | as_warn ("index register specified but zero"); |
| 1067 | if ((operand->flags & S390_OPERAND_BASE) && ex.X_add_number == 0) |
| 1068 | as_warn ("base register specified but zero"); |
| 1069 | s390_insert_operand (insn, operand, ex.X_add_number, NULL, 0); |
| 1070 | } |
| 1071 | } |
| 1072 | else |
| 1073 | { |
| 1074 | suffix = s390_elf_suffix (&str, &ex); |
| 1075 | suffix = s390_lit_suffix (&str, &ex, suffix); |
| 1076 | reloc = BFD_RELOC_UNUSED; |
| 1077 | |
| 1078 | if (suffix == ELF_SUFFIX_GOT) |
| 1079 | { |
| 1080 | if (operand->flags & S390_OPERAND_DISP) |
| 1081 | reloc = BFD_RELOC_390_GOT12; |
| 1082 | else if ((operand->flags & S390_OPERAND_SIGNED) && |
| 1083 | (operand->bits == 16)) |
| 1084 | reloc = BFD_RELOC_390_GOT16; |
| 1085 | else if ((operand->flags & S390_OPERAND_PCREL) && |
| 1086 | (operand->bits == 32)) |
| 1087 | reloc = BFD_RELOC_390_GOTENT; |
| 1088 | } |
| 1089 | else if (suffix == ELF_SUFFIX_PLT) |
| 1090 | { |
| 1091 | if ((operand->flags & S390_OPERAND_PCREL) && |
| 1092 | (operand->bits == 16)) |
| 1093 | reloc = BFD_RELOC_390_PLT16DBL; |
| 1094 | else if ((operand->flags & S390_OPERAND_PCREL) && |
| 1095 | (operand->bits == 32)) |
| 1096 | reloc = BFD_RELOC_390_PLT32DBL; |
| 1097 | } |
| 1098 | else if (suffix == ELF_SUFFIX_GOTENT) |
| 1099 | { |
| 1100 | if ((operand->flags & S390_OPERAND_PCREL) && |
| 1101 | (operand->bits == 32)) |
| 1102 | reloc = BFD_RELOC_390_GOTENT; |
| 1103 | } |
| 1104 | |
| 1105 | if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) |
| 1106 | as_bad (_("invalid operand suffix")); |
| 1107 | /* We need to generate a fixup of type 'reloc' for this |
| 1108 | expression. */ |
| 1109 | if (fc >= MAX_INSN_FIXUPS) |
| 1110 | as_fatal (_("too many fixups")); |
| 1111 | fixups[fc].exp = ex; |
| 1112 | fixups[fc].opindex = *opindex_ptr; |
| 1113 | fixups[fc].reloc = reloc; |
| 1114 | ++fc; |
| 1115 | } |
| 1116 | |
| 1117 | /* Check the next character. The call to expression has advanced |
| 1118 | str past any whitespace. */ |
| 1119 | if (operand->flags & S390_OPERAND_DISP) |
| 1120 | { |
| 1121 | /* After a displacement a block in parentheses can start. */ |
| 1122 | if (*str != '(') |
| 1123 | { |
| 1124 | /* Check if parethesed block can be skipped. If the next |
| 1125 | operand is neiter an optional operand nor a base register |
| 1126 | then we have a syntax error. */ |
| 1127 | operand = s390_operands + *(++opindex_ptr); |
| 1128 | if (!(operand->flags & (S390_OPERAND_INDEX|S390_OPERAND_BASE))) |
| 1129 | as_bad (_("syntax error; missing '(' after displacement")); |
| 1130 | |
| 1131 | /* Ok, skip all operands until S390_OPERAND_BASE. */ |
| 1132 | while (!(operand->flags & S390_OPERAND_BASE)) |
| 1133 | operand = s390_operands + *(++opindex_ptr); |
| 1134 | |
| 1135 | /* If there is a next operand it must be seperated by a comma. */ |
| 1136 | if (opindex_ptr[1] != '\0') |
| 1137 | { |
| 1138 | if (*str++ != ',') |
| 1139 | as_bad (_("syntax error; expected ,")); |
| 1140 | } |
| 1141 | } |
| 1142 | else |
| 1143 | { |
| 1144 | /* We found an opening parentheses. */ |
| 1145 | str++; |
| 1146 | for (f = str; *f != '\0'; f++) |
| 1147 | if (*f == ',' || *f == ')') |
| 1148 | break; |
| 1149 | /* If there is no comma until the closing parentheses OR |
| 1150 | there is a comma right after the opening parentheses, |
| 1151 | we have to skip optional operands. */ |
| 1152 | if (*f == ',' && f == str) |
| 1153 | { |
| 1154 | /* comma directly after '(' ? */ |
| 1155 | skip_optional = 1; |
| 1156 | str++; |
| 1157 | } |
| 1158 | else |
| 1159 | skip_optional = (*f != ','); |
| 1160 | } |
| 1161 | } |
| 1162 | else if (operand->flags & S390_OPERAND_BASE) |
| 1163 | { |
| 1164 | /* After the base register the parenthesed block ends. */ |
| 1165 | if (*str++ != ')') |
| 1166 | as_bad (_("syntax error; missing ')' after base register")); |
| 1167 | skip_optional = 0; |
| 1168 | /* If there is a next operand it must be seperated by a comma. */ |
| 1169 | if (opindex_ptr[1] != '\0') |
| 1170 | { |
| 1171 | if (*str++ != ',') |
| 1172 | as_bad (_("syntax error; expected ,")); |
| 1173 | } |
| 1174 | } |
| 1175 | else |
| 1176 | { |
| 1177 | /* We can find an 'early' closing parentheses in e.g. D(L) instead |
| 1178 | of D(L,B). In this case the base register has to be skipped. */ |
| 1179 | if (*str == ')') |
| 1180 | { |
| 1181 | operand = s390_operands + *(++opindex_ptr); |
| 1182 | |
| 1183 | if (!(operand->flags & S390_OPERAND_BASE)) |
| 1184 | as_bad (_("syntax error; ')' not allowed here")); |
| 1185 | str++; |
| 1186 | } |
| 1187 | /* If there is a next operand it must be seperated by a comma. */ |
| 1188 | if (opindex_ptr[1] != '\0') |
| 1189 | { |
| 1190 | if (*str++ != ',') |
| 1191 | as_bad (_("syntax error; expected ,")); |
| 1192 | } |
| 1193 | } |
| 1194 | } |
| 1195 | |
| 1196 | while (ISSPACE (*str)) |
| 1197 | ++str; |
| 1198 | |
| 1199 | if (*str != '\0') |
| 1200 | { |
| 1201 | char *linefeed; |
| 1202 | |
| 1203 | if ((linefeed = strchr (str, '\n')) != NULL) |
| 1204 | *linefeed = '\0'; |
| 1205 | as_bad (_("junk at end of line: `%s'"), str); |
| 1206 | if (linefeed != NULL) |
| 1207 | *linefeed = '\n'; |
| 1208 | } |
| 1209 | |
| 1210 | /* Write out the instruction. */ |
| 1211 | f = frag_more (opcode->oplen); |
| 1212 | memcpy (f, insn, opcode->oplen); |
| 1213 | |
| 1214 | /* Create any fixups. At this point we do not use a |
| 1215 | bfd_reloc_code_real_type, but instead just use the |
| 1216 | BFD_RELOC_UNUSED plus the operand index. This lets us easily |
| 1217 | handle fixups for any operand type, although that is admittedly |
| 1218 | not a very exciting feature. We pick a BFD reloc type in |
| 1219 | md_apply_fix3. */ |
| 1220 | for (i = 0; i < fc; i++) |
| 1221 | { |
| 1222 | operand = s390_operands + fixups[i].opindex; |
| 1223 | |
| 1224 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
| 1225 | { |
| 1226 | reloc_howto_type *reloc_howto; |
| 1227 | fixS *fixP; |
| 1228 | int size; |
| 1229 | |
| 1230 | reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); |
| 1231 | if (!reloc_howto) |
| 1232 | abort (); |
| 1233 | |
| 1234 | size = bfd_get_reloc_size (reloc_howto); |
| 1235 | |
| 1236 | if (size < 1 || size > 4) |
| 1237 | abort (); |
| 1238 | |
| 1239 | fixP = fix_new_exp (frag_now, |
| 1240 | f - frag_now->fr_literal + (operand->shift/8), |
| 1241 | size, &fixups[i].exp, reloc_howto->pc_relative, |
| 1242 | fixups[i].reloc); |
| 1243 | /* Turn off overflow checking in fixup_segment. This is necessary |
| 1244 | because fixup_segment will signal an overflow for large 4 byte |
| 1245 | quantities for GOT12 relocations. */ |
| 1246 | if (fixups[i].reloc == BFD_RELOC_390_GOT12 || |
| 1247 | fixups[i].reloc == BFD_RELOC_390_GOT16) |
| 1248 | fixP->fx_no_overflow = 1; |
| 1249 | } |
| 1250 | else |
| 1251 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, &fixups[i].exp, |
| 1252 | (operand->flags & S390_OPERAND_PCREL) != 0, |
| 1253 | ((bfd_reloc_code_real_type) |
| 1254 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); |
| 1255 | } |
| 1256 | return str; |
| 1257 | } |
| 1258 | |
| 1259 | /* This routine is called for each instruction to be assembled. */ |
| 1260 | |
| 1261 | void |
| 1262 | md_assemble (str) |
| 1263 | char *str; |
| 1264 | { |
| 1265 | const struct s390_opcode *opcode; |
| 1266 | unsigned char insn[6]; |
| 1267 | char *s; |
| 1268 | |
| 1269 | /* Get the opcode. */ |
| 1270 | for (s = str; *s != '\0' && ! ISSPACE (*s); s++) |
| 1271 | ; |
| 1272 | if (*s != '\0') |
| 1273 | *s++ = '\0'; |
| 1274 | |
| 1275 | /* Look up the opcode in the hash table. */ |
| 1276 | opcode = (struct s390_opcode *) hash_find (s390_opcode_hash, str); |
| 1277 | if (opcode == (const struct s390_opcode *) NULL) |
| 1278 | { |
| 1279 | as_bad (_("Unrecognized opcode: `%s'"), str); |
| 1280 | return; |
| 1281 | } |
| 1282 | else if (!(opcode->architecture & current_arch_mask)) |
| 1283 | { |
| 1284 | as_bad ("Opcode %s not available in this architecture", str); |
| 1285 | return; |
| 1286 | } |
| 1287 | |
| 1288 | memcpy (insn, opcode->opcode, sizeof (insn)); |
| 1289 | md_gather_operands (s, insn, opcode); |
| 1290 | } |
| 1291 | |
| 1292 | #ifndef WORKING_DOT_WORD |
| 1293 | /* Handle long and short jumps. We don't support these */ |
| 1294 | void |
| 1295 | md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) |
| 1296 | char *ptr; |
| 1297 | addressT from_addr, to_addr; |
| 1298 | fragS *frag; |
| 1299 | symbolS *to_symbol; |
| 1300 | { |
| 1301 | abort (); |
| 1302 | } |
| 1303 | |
| 1304 | void |
| 1305 | md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) |
| 1306 | char *ptr; |
| 1307 | addressT from_addr, to_addr; |
| 1308 | fragS *frag; |
| 1309 | symbolS *to_symbol; |
| 1310 | { |
| 1311 | abort (); |
| 1312 | } |
| 1313 | #endif |
| 1314 | |
| 1315 | void |
| 1316 | s390_bss (ignore) |
| 1317 | int ignore ATTRIBUTE_UNUSED; |
| 1318 | { |
| 1319 | /* We don't support putting frags in the BSS segment, we fake it |
| 1320 | by marking in_bss, then looking at s_skip for clues. */ |
| 1321 | |
| 1322 | subseg_set (bss_section, 0); |
| 1323 | demand_empty_rest_of_line (); |
| 1324 | } |
| 1325 | |
| 1326 | /* Pseudo-op handling. */ |
| 1327 | |
| 1328 | void |
| 1329 | s390_insn (ignore) |
| 1330 | int ignore ATTRIBUTE_UNUSED; |
| 1331 | { |
| 1332 | expressionS exp; |
| 1333 | const struct s390_opcode *opformat; |
| 1334 | unsigned char insn[6]; |
| 1335 | char *s; |
| 1336 | |
| 1337 | /* Get the opcode format. */ |
| 1338 | s = input_line_pointer; |
| 1339 | while (*s != '\0' && *s != ',' && ! ISSPACE (*s)) |
| 1340 | s++; |
| 1341 | if (*s != ',') |
| 1342 | as_bad (_("Invalid .insn format\n")); |
| 1343 | *s++ = '\0'; |
| 1344 | |
| 1345 | /* Look up the opcode in the hash table. */ |
| 1346 | opformat = (struct s390_opcode *) |
| 1347 | hash_find (s390_opformat_hash, input_line_pointer); |
| 1348 | if (opformat == (const struct s390_opcode *) NULL) |
| 1349 | { |
| 1350 | as_bad (_("Unrecognized opcode format: `%s'"), input_line_pointer); |
| 1351 | return; |
| 1352 | } |
| 1353 | input_line_pointer = s; |
| 1354 | expression (&exp); |
| 1355 | if (exp.X_op == O_constant) |
| 1356 | { |
| 1357 | if ((opformat->oplen == 6 && exp.X_op > 0 && exp.X_op < (1ULL << 48)) || |
| 1358 | (opformat->oplen == 4 && exp.X_op > 0 && exp.X_op < (1ULL << 32)) || |
| 1359 | (opformat->oplen == 2 && exp.X_op > 0 && exp.X_op < (1ULL << 16))) |
| 1360 | md_number_to_chars (insn, exp.X_add_number, opformat->oplen); |
| 1361 | else |
| 1362 | as_bad (_("Invalid .insn format\n")); |
| 1363 | } |
| 1364 | else if (exp.X_op == O_big) |
| 1365 | { |
| 1366 | if (exp.X_add_number > 0 && |
| 1367 | opformat->oplen == 6 && |
| 1368 | generic_bignum[3] == 0) |
| 1369 | { |
| 1370 | md_number_to_chars (insn, generic_bignum[2], 2); |
| 1371 | md_number_to_chars (&insn[2], generic_bignum[1], 2); |
| 1372 | md_number_to_chars (&insn[4], generic_bignum[0], 2); |
| 1373 | } |
| 1374 | else |
| 1375 | as_bad (_("Invalid .insn format\n")); |
| 1376 | } |
| 1377 | else |
| 1378 | as_bad (_("second operand of .insn not a constant\n")); |
| 1379 | |
| 1380 | if (strcmp (opformat->name, "e") != 0 && *input_line_pointer++ != ',') |
| 1381 | as_bad (_("missing comma after insn constant\n")); |
| 1382 | |
| 1383 | if ((s = strchr (input_line_pointer, '\n')) != NULL) |
| 1384 | *s = '\0'; |
| 1385 | input_line_pointer = md_gather_operands (input_line_pointer, insn, |
| 1386 | opformat); |
| 1387 | if (s != NULL) |
| 1388 | *s = '\n'; |
| 1389 | demand_empty_rest_of_line (); |
| 1390 | } |
| 1391 | |
| 1392 | /* The .byte pseudo-op. This is similar to the normal .byte |
| 1393 | pseudo-op, but it can also take a single ASCII string. */ |
| 1394 | |
| 1395 | static void |
| 1396 | s390_byte (ignore) |
| 1397 | int ignore ATTRIBUTE_UNUSED; |
| 1398 | { |
| 1399 | if (*input_line_pointer != '\"') |
| 1400 | { |
| 1401 | cons (1); |
| 1402 | return; |
| 1403 | } |
| 1404 | |
| 1405 | /* Gather characters. A real double quote is doubled. Unusual |
| 1406 | characters are not permitted. */ |
| 1407 | ++input_line_pointer; |
| 1408 | while (1) |
| 1409 | { |
| 1410 | char c; |
| 1411 | |
| 1412 | c = *input_line_pointer++; |
| 1413 | |
| 1414 | if (c == '\"') |
| 1415 | { |
| 1416 | if (*input_line_pointer != '\"') |
| 1417 | break; |
| 1418 | ++input_line_pointer; |
| 1419 | } |
| 1420 | |
| 1421 | FRAG_APPEND_1_CHAR (c); |
| 1422 | } |
| 1423 | |
| 1424 | demand_empty_rest_of_line (); |
| 1425 | } |
| 1426 | |
| 1427 | /* The .ltorg pseudo-op.This emits all literals defined since the last |
| 1428 | .ltorg or the invocation of gas. Literals are defined with the |
| 1429 | @lit suffix. */ |
| 1430 | |
| 1431 | static void |
| 1432 | s390_literals (ignore) |
| 1433 | int ignore ATTRIBUTE_UNUSED; |
| 1434 | { |
| 1435 | struct s390_lpe *lpe; |
| 1436 | |
| 1437 | if (lp_sym == NULL || lpe_count == 0) |
| 1438 | return; /* nothing to be done */ |
| 1439 | |
| 1440 | /* Emit symbol for start of literal pool. */ |
| 1441 | S_SET_SEGMENT (lp_sym, now_seg); |
| 1442 | S_SET_VALUE (lp_sym, (valueT) frag_now_fix ()); |
| 1443 | lp_sym->sy_frag = frag_now; |
| 1444 | |
| 1445 | while (lpe_list) |
| 1446 | { |
| 1447 | lpe = lpe_list; |
| 1448 | lpe_list = lpe_list->next; |
| 1449 | S_SET_SEGMENT (lpe->sym, now_seg); |
| 1450 | S_SET_VALUE (lpe->sym, (valueT) frag_now_fix ()); |
| 1451 | lpe->sym->sy_frag = frag_now; |
| 1452 | |
| 1453 | /* Emit literal pool entry. */ |
| 1454 | if (lpe->reloc != BFD_RELOC_UNUSED) |
| 1455 | { |
| 1456 | reloc_howto_type *reloc_howto = |
| 1457 | bfd_reloc_type_lookup (stdoutput, lpe->reloc); |
| 1458 | int size = bfd_get_reloc_size (reloc_howto); |
| 1459 | char *where; |
| 1460 | |
| 1461 | if (size > lpe->nbytes) |
| 1462 | as_bad (_("%s relocations do not fit in %d bytes"), |
| 1463 | reloc_howto->name, lpe->nbytes); |
| 1464 | where = frag_more (lpe->nbytes); |
| 1465 | md_number_to_chars (where, 0, size); |
| 1466 | fix_new_exp (frag_now, where - frag_now->fr_literal, |
| 1467 | size, &lpe->ex, reloc_howto->pc_relative, lpe->reloc); |
| 1468 | } |
| 1469 | else |
| 1470 | { |
| 1471 | if (lpe->ex.X_op == O_big) |
| 1472 | { |
| 1473 | if (lpe->ex.X_add_number <= 0) |
| 1474 | generic_floating_point_number = lpe->floatnum; |
| 1475 | else |
| 1476 | memcpy (generic_bignum, lpe->bignum, |
| 1477 | lpe->ex.X_add_number*sizeof (LITTLENUM_TYPE)); |
| 1478 | } |
| 1479 | emit_expr (&lpe->ex, lpe->nbytes); |
| 1480 | } |
| 1481 | |
| 1482 | lpe->next = lpe_free_list; |
| 1483 | lpe_free_list = lpe; |
| 1484 | } |
| 1485 | lpe_list_tail = NULL; |
| 1486 | lp_sym = NULL; |
| 1487 | lp_count++; |
| 1488 | lpe_count = 0; |
| 1489 | } |
| 1490 | |
| 1491 | /* Turn a string in input_line_pointer into a floating point constant |
| 1492 | of type type, and store the appropriate bytes in *litp. The number |
| 1493 | of LITTLENUMS emitted is stored in *sizep . An error message is |
| 1494 | returned, or NULL on OK. */ |
| 1495 | |
| 1496 | char * |
| 1497 | md_atof (type, litp, sizep) |
| 1498 | int type; |
| 1499 | char *litp; |
| 1500 | int *sizep; |
| 1501 | { |
| 1502 | int prec; |
| 1503 | LITTLENUM_TYPE words[4]; |
| 1504 | char *t; |
| 1505 | int i; |
| 1506 | |
| 1507 | switch (type) |
| 1508 | { |
| 1509 | case 'f': |
| 1510 | prec = 2; |
| 1511 | break; |
| 1512 | |
| 1513 | case 'd': |
| 1514 | prec = 4; |
| 1515 | break; |
| 1516 | |
| 1517 | default: |
| 1518 | *sizep = 0; |
| 1519 | return "bad call to md_atof"; |
| 1520 | } |
| 1521 | |
| 1522 | t = atof_ieee (input_line_pointer, type, words); |
| 1523 | if (t) |
| 1524 | input_line_pointer = t; |
| 1525 | |
| 1526 | *sizep = prec * 2; |
| 1527 | |
| 1528 | for (i = 0; i < prec; i++) |
| 1529 | { |
| 1530 | md_number_to_chars (litp, (valueT) words[i], 2); |
| 1531 | litp += 2; |
| 1532 | } |
| 1533 | |
| 1534 | return NULL; |
| 1535 | } |
| 1536 | |
| 1537 | /* Align a section (I don't know why this is machine dependent). */ |
| 1538 | |
| 1539 | valueT |
| 1540 | md_section_align (seg, addr) |
| 1541 | asection *seg; |
| 1542 | valueT addr; |
| 1543 | { |
| 1544 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 1545 | |
| 1546 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 1547 | } |
| 1548 | |
| 1549 | /* We don't have any form of relaxing. */ |
| 1550 | |
| 1551 | int |
| 1552 | md_estimate_size_before_relax (fragp, seg) |
| 1553 | fragS *fragp ATTRIBUTE_UNUSED; |
| 1554 | asection *seg ATTRIBUTE_UNUSED; |
| 1555 | { |
| 1556 | abort (); |
| 1557 | return 0; |
| 1558 | } |
| 1559 | |
| 1560 | /* Convert a machine dependent frag. We never generate these. */ |
| 1561 | |
| 1562 | void |
| 1563 | md_convert_frag (abfd, sec, fragp) |
| 1564 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1565 | asection *sec ATTRIBUTE_UNUSED; |
| 1566 | fragS *fragp ATTRIBUTE_UNUSED; |
| 1567 | { |
| 1568 | abort (); |
| 1569 | } |
| 1570 | |
| 1571 | symbolS * |
| 1572 | md_undefined_symbol (name) |
| 1573 | char *name; |
| 1574 | { |
| 1575 | if (*name == '_' && *(name+1) == 'G' |
| 1576 | && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1577 | { |
| 1578 | if (!GOT_symbol) |
| 1579 | { |
| 1580 | if (symbol_find (name)) |
| 1581 | as_bad (_("GOT already in symbol table")); |
| 1582 | GOT_symbol = symbol_new (name, undefined_section, |
| 1583 | (valueT) 0, &zero_address_frag); |
| 1584 | } |
| 1585 | return GOT_symbol; |
| 1586 | } |
| 1587 | return 0; |
| 1588 | } |
| 1589 | |
| 1590 | /* Functions concerning relocs. */ |
| 1591 | |
| 1592 | /* The location from which a PC relative jump should be calculated, |
| 1593 | given a PC relative reloc. */ |
| 1594 | |
| 1595 | long |
| 1596 | md_pcrel_from_section (fixp, sec) |
| 1597 | fixS *fixp; |
| 1598 | segT sec ATTRIBUTE_UNUSED; |
| 1599 | { |
| 1600 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 1601 | } |
| 1602 | |
| 1603 | /* Here we decide which fixups can be adjusted to make them relative to |
| 1604 | the beginning of the section instead of the symbol. Basically we need |
| 1605 | to make sure that the dynamic relocations are done correctly, so in |
| 1606 | some cases we force the original symbol to be used. */ |
| 1607 | int |
| 1608 | tc_s390_fix_adjustable(fixP) |
| 1609 | fixS * fixP; |
| 1610 | { |
| 1611 | /* Prevent all adjustments to global symbols. */ |
| 1612 | if (S_IS_EXTERN (fixP->fx_addsy)) |
| 1613 | return 0; |
| 1614 | if (S_IS_WEAK (fixP->fx_addsy)) |
| 1615 | return 0; |
| 1616 | /* adjust_reloc_syms doesn't know about the GOT. */ |
| 1617 | if (fixP->fx_r_type == BFD_RELOC_32_GOTOFF |
| 1618 | || fixP->fx_r_type == BFD_RELOC_390_PLT16DBL |
| 1619 | || fixP->fx_r_type == BFD_RELOC_390_PLT32 |
| 1620 | || fixP->fx_r_type == BFD_RELOC_390_PLT32DBL |
| 1621 | || fixP->fx_r_type == BFD_RELOC_390_PLT64 |
| 1622 | || fixP->fx_r_type == BFD_RELOC_390_GOT12 |
| 1623 | || fixP->fx_r_type == BFD_RELOC_390_GOT16 |
| 1624 | || fixP->fx_r_type == BFD_RELOC_32_GOT_PCREL |
| 1625 | || fixP->fx_r_type == BFD_RELOC_390_GOT64 |
| 1626 | || fixP->fx_r_type == BFD_RELOC_390_GOTENT |
| 1627 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 1628 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 1629 | return 0; |
| 1630 | return 1; |
| 1631 | } |
| 1632 | |
| 1633 | /* Apply a fixup to the object code. This is called for all the |
| 1634 | fixups we generated by the call to fix_new_exp, above. In the call |
| 1635 | above we used a reloc code which was the largest legal reloc code |
| 1636 | plus the operand index. Here we undo that to recover the operand |
| 1637 | index. At this point all symbol values should be fully resolved, |
| 1638 | and we attempt to completely resolve the reloc. If we can not do |
| 1639 | that, we determine the correct reloc code and put it back in the |
| 1640 | fixup. */ |
| 1641 | |
| 1642 | int |
| 1643 | md_apply_fix3 (fixp, valuep, seg) |
| 1644 | fixS *fixp; |
| 1645 | valueT *valuep; |
| 1646 | segT seg ATTRIBUTE_UNUSED; |
| 1647 | { |
| 1648 | char *where; |
| 1649 | valueT value; |
| 1650 | |
| 1651 | value = *valuep; |
| 1652 | where = fixp->fx_frag->fr_literal + fixp->fx_where; |
| 1653 | |
| 1654 | if (fixp->fx_subsy != NULL) |
| 1655 | { |
| 1656 | if (!S_IS_DEFINED (fixp->fx_subsy)) |
| 1657 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1658 | _("unresolved fx_subsy symbol that must be resolved")); |
| 1659 | value -= S_GET_VALUE(fixp->fx_subsy); |
| 1660 | } |
| 1661 | |
| 1662 | if (fixp->fx_addsy != NULL) |
| 1663 | { |
| 1664 | /* `*valuep' may contain the value of the symbol on which the reloc |
| 1665 | will be based; we have to remove it. */ |
| 1666 | if (fixp->fx_addsy->sy_used_in_reloc |
| 1667 | && S_GET_SEGMENT (fixp->fx_addsy) != absolute_section |
| 1668 | && S_GET_SEGMENT (fixp->fx_addsy) != undefined_section |
| 1669 | && ! bfd_is_com_section (S_GET_SEGMENT (fixp->fx_addsy))) |
| 1670 | value -= S_GET_VALUE (fixp->fx_addsy); |
| 1671 | |
| 1672 | if (fixp->fx_pcrel) |
| 1673 | value += fixp->fx_frag->fr_address + fixp->fx_where; |
| 1674 | } |
| 1675 | else |
| 1676 | fixp->fx_done = 1; |
| 1677 | |
| 1678 | if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) |
| 1679 | { |
| 1680 | const struct s390_operand *operand; |
| 1681 | int opindex; |
| 1682 | |
| 1683 | opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; |
| 1684 | operand = &s390_operands[opindex]; |
| 1685 | |
| 1686 | if (fixp->fx_done) |
| 1687 | { |
| 1688 | /* Insert the fully resolved operand value. */ |
| 1689 | s390_insert_operand (where, operand, (offsetT) value, |
| 1690 | fixp->fx_file, fixp->fx_line); |
| 1691 | |
| 1692 | return 1; |
| 1693 | } |
| 1694 | |
| 1695 | /* Determine a BFD reloc value based on the operand information. |
| 1696 | We are only prepared to turn a few of the operands into |
| 1697 | relocs. */ |
| 1698 | fixp->fx_offset = value; |
| 1699 | if (operand->bits == 12 && operand->shift == 20) |
| 1700 | { |
| 1701 | fixp->fx_size = 2; |
| 1702 | fixp->fx_where += 2; |
| 1703 | fixp->fx_r_type = BFD_RELOC_390_12; |
| 1704 | } |
| 1705 | else if (operand->bits == 12 && operand->shift == 36) |
| 1706 | { |
| 1707 | fixp->fx_size = 2; |
| 1708 | fixp->fx_where += 4; |
| 1709 | fixp->fx_r_type = BFD_RELOC_390_12; |
| 1710 | } |
| 1711 | else if (operand->bits == 8 && operand->shift == 8) |
| 1712 | { |
| 1713 | fixp->fx_size = 1; |
| 1714 | fixp->fx_where += 1; |
| 1715 | fixp->fx_r_type = BFD_RELOC_8; |
| 1716 | } |
| 1717 | else if (operand->bits == 16 && operand->shift == 16) |
| 1718 | { |
| 1719 | fixp->fx_size = 2; |
| 1720 | fixp->fx_where += 2; |
| 1721 | if (operand->flags & S390_OPERAND_PCREL) |
| 1722 | { |
| 1723 | fixp->fx_r_type = BFD_RELOC_390_PC16DBL; |
| 1724 | fixp->fx_offset += 2; |
| 1725 | } |
| 1726 | else |
| 1727 | fixp->fx_r_type = BFD_RELOC_16; |
| 1728 | } |
| 1729 | else if (operand->bits == 32 && operand->shift == 16 && |
| 1730 | (operand->flags & S390_OPERAND_PCREL)) |
| 1731 | { |
| 1732 | fixp->fx_size = 4; |
| 1733 | fixp->fx_where += 2; |
| 1734 | fixp->fx_offset += 2; |
| 1735 | fixp->fx_r_type = BFD_RELOC_390_PC32DBL; |
| 1736 | } |
| 1737 | else |
| 1738 | { |
| 1739 | char *sfile; |
| 1740 | unsigned int sline; |
| 1741 | |
| 1742 | /* Use expr_symbol_where to see if this is an expression |
| 1743 | symbol. */ |
| 1744 | if (expr_symbol_where (fixp->fx_addsy, &sfile, &sline)) |
| 1745 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1746 | _("unresolved expression that must be resolved")); |
| 1747 | else |
| 1748 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1749 | _("unsupported relocation type")); |
| 1750 | fixp->fx_done = 1; |
| 1751 | return 1; |
| 1752 | } |
| 1753 | } |
| 1754 | else |
| 1755 | { |
| 1756 | switch (fixp->fx_r_type) |
| 1757 | { |
| 1758 | case BFD_RELOC_8: |
| 1759 | if (fixp->fx_pcrel) |
| 1760 | abort (); |
| 1761 | if (fixp->fx_done) |
| 1762 | md_number_to_chars (where, value, 1); |
| 1763 | break; |
| 1764 | case BFD_RELOC_390_12: |
| 1765 | case BFD_RELOC_390_GOT12: |
| 1766 | if (fixp->fx_done) |
| 1767 | { |
| 1768 | unsigned short mop; |
| 1769 | |
| 1770 | mop = bfd_getb16 ((unsigned char *) where); |
| 1771 | mop |= (unsigned short) (value & 0xfff); |
| 1772 | bfd_putb16 ((bfd_vma) mop, (unsigned char *) where); |
| 1773 | } |
| 1774 | break; |
| 1775 | |
| 1776 | case BFD_RELOC_16: |
| 1777 | case BFD_RELOC_GPREL16: |
| 1778 | case BFD_RELOC_16_GOT_PCREL: |
| 1779 | case BFD_RELOC_16_GOTOFF: |
| 1780 | if (fixp->fx_pcrel) |
| 1781 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1782 | "cannot emit PC relative %s relocation%s%s", |
| 1783 | bfd_get_reloc_code_name (fixp->fx_r_type), |
| 1784 | fixp->fx_addsy != NULL ? " against " : "", |
| 1785 | (fixp->fx_addsy != NULL |
| 1786 | ? S_GET_NAME (fixp->fx_addsy) |
| 1787 | : "")); |
| 1788 | if (fixp->fx_done) |
| 1789 | md_number_to_chars (where, value, 2); |
| 1790 | break; |
| 1791 | case BFD_RELOC_390_GOT16: |
| 1792 | if (fixp->fx_done) |
| 1793 | md_number_to_chars (where, value, 2); |
| 1794 | break; |
| 1795 | case BFD_RELOC_390_PC16DBL: |
| 1796 | case BFD_RELOC_390_PLT16DBL: |
| 1797 | value += 2; |
| 1798 | if (fixp->fx_done) |
| 1799 | md_number_to_chars (where, (offsetT) value >> 1, 2); |
| 1800 | break; |
| 1801 | |
| 1802 | case BFD_RELOC_32: |
| 1803 | if (fixp->fx_pcrel) |
| 1804 | fixp->fx_r_type = BFD_RELOC_32_PCREL; |
| 1805 | else |
| 1806 | fixp->fx_r_type = BFD_RELOC_32; |
| 1807 | if (fixp->fx_done) |
| 1808 | md_number_to_chars (where, value, 4); |
| 1809 | break; |
| 1810 | case BFD_RELOC_32_PCREL: |
| 1811 | case BFD_RELOC_32_BASEREL: |
| 1812 | fixp->fx_r_type = BFD_RELOC_32_PCREL; |
| 1813 | if (fixp->fx_done) |
| 1814 | md_number_to_chars (where, value, 4); |
| 1815 | break; |
| 1816 | case BFD_RELOC_32_GOT_PCREL: |
| 1817 | case BFD_RELOC_390_PLT32: |
| 1818 | if (fixp->fx_done) |
| 1819 | md_number_to_chars (where, value, 4); |
| 1820 | break; |
| 1821 | case BFD_RELOC_390_PC32DBL: |
| 1822 | case BFD_RELOC_390_PLT32DBL: |
| 1823 | case BFD_RELOC_390_GOTPCDBL: |
| 1824 | case BFD_RELOC_390_GOTENT: |
| 1825 | value += 2; |
| 1826 | if (fixp->fx_done) |
| 1827 | md_number_to_chars (where, (offsetT) value >> 1, 4); |
| 1828 | break; |
| 1829 | |
| 1830 | case BFD_RELOC_32_GOTOFF: |
| 1831 | if (fixp->fx_done) |
| 1832 | md_number_to_chars (where, value, sizeof (int)); |
| 1833 | break; |
| 1834 | |
| 1835 | case BFD_RELOC_390_GOT64: |
| 1836 | case BFD_RELOC_390_PLT64: |
| 1837 | if (fixp->fx_done) |
| 1838 | md_number_to_chars (where, value, 8); |
| 1839 | break; |
| 1840 | |
| 1841 | case BFD_RELOC_64: |
| 1842 | if (fixp->fx_pcrel) |
| 1843 | fixp->fx_r_type = BFD_RELOC_64_PCREL; |
| 1844 | else |
| 1845 | fixp->fx_r_type = BFD_RELOC_64; |
| 1846 | if (fixp->fx_done) |
| 1847 | md_number_to_chars (where, value, 8); |
| 1848 | break; |
| 1849 | |
| 1850 | case BFD_RELOC_64_PCREL: |
| 1851 | fixp->fx_r_type = BFD_RELOC_64_PCREL; |
| 1852 | if (fixp->fx_done) |
| 1853 | md_number_to_chars (where, value, 8); |
| 1854 | break; |
| 1855 | |
| 1856 | case BFD_RELOC_VTABLE_INHERIT: |
| 1857 | case BFD_RELOC_VTABLE_ENTRY: |
| 1858 | fixp->fx_done = 0; |
| 1859 | return 1; |
| 1860 | |
| 1861 | default: |
| 1862 | { |
| 1863 | const char *reloc_name = bfd_get_reloc_code_name (fixp->fx_r_type); |
| 1864 | |
| 1865 | if (reloc_name != NULL) |
| 1866 | fprintf (stderr, "Gas failure, reloc type %s\n", reloc_name); |
| 1867 | else |
| 1868 | fprintf (stderr, "Gas failure, reloc type #%i\n", fixp->fx_r_type); |
| 1869 | fflush (stderr); |
| 1870 | abort (); |
| 1871 | } |
| 1872 | } |
| 1873 | |
| 1874 | fixp->fx_offset = value; |
| 1875 | } |
| 1876 | |
| 1877 | return 1; |
| 1878 | } |
| 1879 | |
| 1880 | /* Generate a reloc for a fixup. */ |
| 1881 | |
| 1882 | arelent * |
| 1883 | tc_gen_reloc (seg, fixp) |
| 1884 | asection *seg ATTRIBUTE_UNUSED; |
| 1885 | fixS *fixp; |
| 1886 | { |
| 1887 | bfd_reloc_code_real_type code; |
| 1888 | arelent *reloc; |
| 1889 | |
| 1890 | code = fixp->fx_r_type; |
| 1891 | if (GOT_symbol && fixp->fx_addsy == GOT_symbol) |
| 1892 | { |
| 1893 | if ((s390_arch_size == 32 && code == BFD_RELOC_32_PCREL) || |
| 1894 | (s390_arch_size == 64 && code == BFD_RELOC_64_PCREL)) |
| 1895 | code = BFD_RELOC_390_GOTPC; |
| 1896 | if (code == BFD_RELOC_390_PC32DBL) |
| 1897 | code = BFD_RELOC_390_GOTPCDBL; |
| 1898 | } |
| 1899 | |
| 1900 | reloc = (arelent *) xmalloc (sizeof (arelent)); |
| 1901 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 1902 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 1903 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 1904 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 1905 | if (reloc->howto == NULL) |
| 1906 | { |
| 1907 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1908 | _("cannot represent relocation type %s"), |
| 1909 | bfd_get_reloc_code_name (code)); |
| 1910 | /* Set howto to a garbage value so that we can keep going. */ |
| 1911 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); |
| 1912 | assert (reloc->howto != NULL); |
| 1913 | } |
| 1914 | reloc->addend = fixp->fx_offset; |
| 1915 | |
| 1916 | return reloc; |
| 1917 | } |