| 1 | /* tc-h8300.c -- Assemble code for the Hitachi H8/300 |
| 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, |
| 3 | 2001, 2002 Free Software Foundation, Inc. |
| 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 | /* Written By Steve Chamberlain <sac@cygnus.com>. */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include "as.h" |
| 26 | #include "subsegs.h" |
| 27 | #include "bfd.h" |
| 28 | #define DEFINE_TABLE |
| 29 | #define h8_opcodes ops |
| 30 | #include "opcode/h8300.h" |
| 31 | #include "safe-ctype.h" |
| 32 | |
| 33 | #ifdef OBJ_ELF |
| 34 | #include "elf/h8.h" |
| 35 | #endif |
| 36 | |
| 37 | const char comment_chars[] = ";"; |
| 38 | const char line_comment_chars[] = "#"; |
| 39 | const char line_separator_chars[] = ""; |
| 40 | |
| 41 | void cons PARAMS ((int)); |
| 42 | void sbranch PARAMS ((int)); |
| 43 | void h8300hmode PARAMS ((int)); |
| 44 | void h8300smode PARAMS ((int)); |
| 45 | static void pint PARAMS ((int)); |
| 46 | |
| 47 | int Hmode; |
| 48 | int Smode; |
| 49 | |
| 50 | #define PSIZE (Hmode ? L_32 : L_16) |
| 51 | #define DMODE (L_16) |
| 52 | #define DSYMMODE (Hmode ? L_24 : L_16) |
| 53 | |
| 54 | int bsize = L_8; /* default branch displacement */ |
| 55 | |
| 56 | void |
| 57 | h8300hmode (arg) |
| 58 | int arg ATTRIBUTE_UNUSED; |
| 59 | { |
| 60 | Hmode = 1; |
| 61 | Smode = 0; |
| 62 | #ifdef BFD_ASSEMBLER |
| 63 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_h8300, bfd_mach_h8300h)) |
| 64 | as_warn (_("could not set architecture and machine")); |
| 65 | #endif |
| 66 | } |
| 67 | |
| 68 | void |
| 69 | h8300smode (arg) |
| 70 | int arg ATTRIBUTE_UNUSED; |
| 71 | { |
| 72 | Smode = 1; |
| 73 | Hmode = 1; |
| 74 | #ifdef BFD_ASSEMBLER |
| 75 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_h8300, bfd_mach_h8300s)) |
| 76 | as_warn (_("could not set architecture and machine")); |
| 77 | #endif |
| 78 | } |
| 79 | |
| 80 | void |
| 81 | sbranch (size) |
| 82 | int size; |
| 83 | { |
| 84 | bsize = size; |
| 85 | } |
| 86 | |
| 87 | static void |
| 88 | pint (arg) |
| 89 | int arg ATTRIBUTE_UNUSED; |
| 90 | { |
| 91 | cons (Hmode ? 4 : 2); |
| 92 | } |
| 93 | |
| 94 | /* This table describes all the machine specific pseudo-ops the assembler |
| 95 | has to support. The fields are: |
| 96 | pseudo-op name without dot |
| 97 | function to call to execute this pseudo-op |
| 98 | Integer arg to pass to the function. */ |
| 99 | |
| 100 | const pseudo_typeS md_pseudo_table[] = |
| 101 | { |
| 102 | {"h8300h", h8300hmode, 0}, |
| 103 | {"h8300s", h8300smode, 0}, |
| 104 | {"sbranch", sbranch, L_8}, |
| 105 | {"lbranch", sbranch, L_16}, |
| 106 | |
| 107 | {"int", pint, 0}, |
| 108 | {"data.b", cons, 1}, |
| 109 | {"data.w", cons, 2}, |
| 110 | {"data.l", cons, 4}, |
| 111 | {"form", listing_psize, 0}, |
| 112 | {"heading", listing_title, 0}, |
| 113 | {"import", s_ignore, 0}, |
| 114 | {"page", listing_eject, 0}, |
| 115 | {"program", s_ignore, 0}, |
| 116 | {0, 0, 0} |
| 117 | }; |
| 118 | |
| 119 | const int md_reloc_size; |
| 120 | |
| 121 | const char EXP_CHARS[] = "eE"; |
| 122 | |
| 123 | /* Chars that mean this number is a floating point constant |
| 124 | As in 0f12.456 |
| 125 | or 0d1.2345e12. */ |
| 126 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| 127 | |
| 128 | static struct hash_control *opcode_hash_control; /* Opcode mnemonics. */ |
| 129 | |
| 130 | /* This function is called once, at assembler startup time. This |
| 131 | should set up all the tables, etc. that the MD part of the assembler |
| 132 | needs. */ |
| 133 | |
| 134 | void |
| 135 | md_begin () |
| 136 | { |
| 137 | struct h8_opcode *opcode; |
| 138 | char prev_buffer[100]; |
| 139 | int idx = 0; |
| 140 | |
| 141 | #ifdef BFD_ASSEMBLER |
| 142 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_h8300, bfd_mach_h8300)) |
| 143 | as_warn (_("could not set architecture and machine")); |
| 144 | #endif |
| 145 | |
| 146 | opcode_hash_control = hash_new (); |
| 147 | prev_buffer[0] = 0; |
| 148 | |
| 149 | for (opcode = h8_opcodes; opcode->name; opcode++) |
| 150 | { |
| 151 | /* Strip off any . part when inserting the opcode and only enter |
| 152 | unique codes into the hash table. */ |
| 153 | char *src = opcode->name; |
| 154 | unsigned int len = strlen (src); |
| 155 | char *dst = malloc (len + 1); |
| 156 | char *buffer = dst; |
| 157 | |
| 158 | opcode->size = 0; |
| 159 | while (*src) |
| 160 | { |
| 161 | if (*src == '.') |
| 162 | { |
| 163 | src++; |
| 164 | opcode->size = *src; |
| 165 | break; |
| 166 | } |
| 167 | *dst++ = *src++; |
| 168 | } |
| 169 | *dst++ = 0; |
| 170 | if (strcmp (buffer, prev_buffer)) |
| 171 | { |
| 172 | hash_insert (opcode_hash_control, buffer, (char *) opcode); |
| 173 | strcpy (prev_buffer, buffer); |
| 174 | idx++; |
| 175 | } |
| 176 | opcode->idx = idx; |
| 177 | |
| 178 | /* Find the number of operands. */ |
| 179 | opcode->noperands = 0; |
| 180 | while (opcode->args.nib[opcode->noperands] != E) |
| 181 | opcode->noperands++; |
| 182 | |
| 183 | /* Find the length of the opcode in bytes. */ |
| 184 | opcode->length = 0; |
| 185 | while (opcode->data.nib[opcode->length * 2] != E) |
| 186 | opcode->length++; |
| 187 | } |
| 188 | |
| 189 | linkrelax = 1; |
| 190 | } |
| 191 | |
| 192 | struct h8_exp |
| 193 | { |
| 194 | char *e_beg; |
| 195 | char *e_end; |
| 196 | expressionS e_exp; |
| 197 | }; |
| 198 | |
| 199 | int dispreg; |
| 200 | int opsize; /* Set when a register size is seen. */ |
| 201 | |
| 202 | struct h8_op |
| 203 | { |
| 204 | op_type mode; |
| 205 | unsigned reg; |
| 206 | expressionS exp; |
| 207 | }; |
| 208 | |
| 209 | static void clever_message PARAMS ((struct h8_opcode *, struct h8_op *)); |
| 210 | static void build_bytes PARAMS ((struct h8_opcode *, struct h8_op *)); |
| 211 | static void do_a_fix_imm PARAMS ((int, struct h8_op *, int)); |
| 212 | static void check_operand PARAMS ((struct h8_op *, unsigned int, char *)); |
| 213 | static struct h8_opcode * get_specific PARAMS ((struct h8_opcode *, struct h8_op *, int)); |
| 214 | static char * get_operands PARAMS ((unsigned, char *, struct h8_op *)); |
| 215 | static void get_operand PARAMS ((char **, struct h8_op *, unsigned, int)); |
| 216 | static char * skip_colonthing PARAMS ((char *, expressionS *, int *)); |
| 217 | static char * parse_exp PARAMS ((char *, expressionS *)); |
| 218 | static int parse_reg PARAMS ((char *, op_type *, unsigned *, int)); |
| 219 | char * colonmod24 PARAMS ((struct h8_op *, char *)); |
| 220 | |
| 221 | /* |
| 222 | parse operands |
| 223 | WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp |
| 224 | r0l,r0h,..r7l,r7h |
| 225 | @WREG |
| 226 | @WREG+ |
| 227 | @-WREG |
| 228 | #const |
| 229 | ccr |
| 230 | */ |
| 231 | |
| 232 | /* Try to parse a reg name. Return the number of chars consumed. */ |
| 233 | |
| 234 | static int |
| 235 | parse_reg (src, mode, reg, direction) |
| 236 | char *src; |
| 237 | op_type *mode; |
| 238 | unsigned int *reg; |
| 239 | int direction; |
| 240 | { |
| 241 | char *end; |
| 242 | int len; |
| 243 | |
| 244 | /* Cribbed from get_symbol_end. */ |
| 245 | if (!is_name_beginner (*src) || *src == '\001') |
| 246 | return 0; |
| 247 | end = src + 1; |
| 248 | while (is_part_of_name (*end) || *end == '\001') |
| 249 | end++; |
| 250 | len = end - src; |
| 251 | |
| 252 | if (len == 2 && src[0] == 's' && src[1] == 'p') |
| 253 | { |
| 254 | *mode = PSIZE | REG | direction; |
| 255 | *reg = 7; |
| 256 | return len; |
| 257 | } |
| 258 | if (len == 3 && src[0] == 'c' && src[1] == 'c' && src[2] == 'r') |
| 259 | { |
| 260 | *mode = CCR; |
| 261 | *reg = 0; |
| 262 | return len; |
| 263 | } |
| 264 | if (len == 3 && src[0] == 'e' && src[1] == 'x' && src[2] == 'r') |
| 265 | { |
| 266 | *mode = EXR; |
| 267 | *reg = 0; |
| 268 | return len; |
| 269 | } |
| 270 | if (len == 2 && src[0] == 'f' && src[1] == 'p') |
| 271 | { |
| 272 | *mode = PSIZE | REG | direction; |
| 273 | *reg = 6; |
| 274 | return len; |
| 275 | } |
| 276 | if (len == 3 && src[0] == 'e' && src[1] == 'r' |
| 277 | && src[2] >= '0' && src[2] <= '7') |
| 278 | { |
| 279 | *mode = L_32 | REG | direction; |
| 280 | *reg = src[2] - '0'; |
| 281 | if (!Hmode) |
| 282 | as_warn (_("Reg not valid for H8/300")); |
| 283 | return len; |
| 284 | } |
| 285 | if (len == 2 && src[0] == 'e' && src[1] >= '0' && src[1] <= '7') |
| 286 | { |
| 287 | *mode = L_16 | REG | direction; |
| 288 | *reg = src[1] - '0' + 8; |
| 289 | if (!Hmode) |
| 290 | as_warn (_("Reg not valid for H8/300")); |
| 291 | return len; |
| 292 | } |
| 293 | |
| 294 | if (src[0] == 'r') |
| 295 | { |
| 296 | if (src[1] >= '0' && src[1] <= '7') |
| 297 | { |
| 298 | if (len == 3 && src[2] == 'l') |
| 299 | { |
| 300 | *mode = L_8 | REG | direction; |
| 301 | *reg = (src[1] - '0') + 8; |
| 302 | return len; |
| 303 | } |
| 304 | if (len == 3 && src[2] == 'h') |
| 305 | { |
| 306 | *mode = L_8 | REG | direction; |
| 307 | *reg = (src[1] - '0'); |
| 308 | return len; |
| 309 | } |
| 310 | if (len == 2) |
| 311 | { |
| 312 | *mode = L_16 | REG | direction; |
| 313 | *reg = (src[1] - '0'); |
| 314 | return len; |
| 315 | } |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static char * |
| 323 | parse_exp (s, op) |
| 324 | char *s; |
| 325 | expressionS *op; |
| 326 | { |
| 327 | char *save = input_line_pointer; |
| 328 | char *new; |
| 329 | |
| 330 | input_line_pointer = s; |
| 331 | expression (op); |
| 332 | if (op->X_op == O_absent) |
| 333 | as_bad (_("missing operand")); |
| 334 | new = input_line_pointer; |
| 335 | input_line_pointer = save; |
| 336 | return new; |
| 337 | } |
| 338 | |
| 339 | static char * |
| 340 | skip_colonthing (ptr, exp, mode) |
| 341 | char *ptr; |
| 342 | expressionS *exp ATTRIBUTE_UNUSED; |
| 343 | int *mode; |
| 344 | { |
| 345 | if (*ptr == ':') |
| 346 | { |
| 347 | ptr++; |
| 348 | *mode &= ~SIZE; |
| 349 | if (*ptr == '8') |
| 350 | { |
| 351 | ptr++; |
| 352 | /* ff fill any 8 bit quantity. */ |
| 353 | /* exp->X_add_number -= 0x100; */ |
| 354 | *mode |= L_8; |
| 355 | } |
| 356 | else |
| 357 | { |
| 358 | if (*ptr == '2') |
| 359 | { |
| 360 | *mode |= L_24; |
| 361 | } |
| 362 | else if (*ptr == '3') |
| 363 | { |
| 364 | *mode |= L_32; |
| 365 | } |
| 366 | else if (*ptr == '1') |
| 367 | { |
| 368 | *mode |= L_16; |
| 369 | } |
| 370 | while (ISDIGIT (*ptr)) |
| 371 | ptr++; |
| 372 | } |
| 373 | } |
| 374 | return ptr; |
| 375 | } |
| 376 | |
| 377 | /* The many forms of operand: |
| 378 | |
| 379 | Rn Register direct |
| 380 | @Rn Register indirect |
| 381 | @(exp[:16], Rn) Register indirect with displacement |
| 382 | @Rn+ |
| 383 | @-Rn |
| 384 | @aa:8 absolute 8 bit |
| 385 | @aa:16 absolute 16 bit |
| 386 | @aa absolute 16 bit |
| 387 | |
| 388 | #xx[:size] immediate data |
| 389 | @(exp:[8], pc) pc rel |
| 390 | @@aa[:8] memory indirect. */ |
| 391 | |
| 392 | char * |
| 393 | colonmod24 (op, src) |
| 394 | struct h8_op *op; |
| 395 | char *src; |
| 396 | { |
| 397 | int mode = 0; |
| 398 | src = skip_colonthing (src, &op->exp, &mode); |
| 399 | |
| 400 | if (!mode) |
| 401 | { |
| 402 | /* Choose a default mode. */ |
| 403 | if (op->exp.X_add_number < -32768 |
| 404 | || op->exp.X_add_number > 32767) |
| 405 | { |
| 406 | if (Hmode) |
| 407 | mode = L_24; |
| 408 | else |
| 409 | mode = L_16; |
| 410 | } |
| 411 | else if (op->exp.X_add_symbol |
| 412 | || op->exp.X_op_symbol) |
| 413 | mode = DSYMMODE; |
| 414 | else |
| 415 | mode = DMODE; |
| 416 | } |
| 417 | |
| 418 | op->mode |= mode; |
| 419 | return src; |
| 420 | } |
| 421 | |
| 422 | static void |
| 423 | get_operand (ptr, op, dst, direction) |
| 424 | char **ptr; |
| 425 | struct h8_op *op; |
| 426 | unsigned int dst ATTRIBUTE_UNUSED; |
| 427 | int direction; |
| 428 | { |
| 429 | char *src = *ptr; |
| 430 | op_type mode; |
| 431 | unsigned int num; |
| 432 | unsigned int len; |
| 433 | |
| 434 | op->mode = E; |
| 435 | |
| 436 | /* Check for '(' and ')' for instructions ldm and stm. */ |
| 437 | if (src[0] == '(' && src[8] == ')') |
| 438 | ++ src; |
| 439 | |
| 440 | /* Gross. Gross. ldm and stm have a format not easily handled |
| 441 | by get_operand. We deal with it explicitly here. */ |
| 442 | if (src[0] == 'e' && src[1] == 'r' && ISDIGIT (src[2]) |
| 443 | && src[3] == '-' && src[4] == 'e' && src[5] == 'r' && ISDIGIT (src[6])) |
| 444 | { |
| 445 | int low, high; |
| 446 | |
| 447 | low = src[2] - '0'; |
| 448 | high = src[6] - '0'; |
| 449 | |
| 450 | if (high < low) |
| 451 | as_bad (_("Invalid register list for ldm/stm\n")); |
| 452 | |
| 453 | if (low % 2) |
| 454 | as_bad (_("Invalid register list for ldm/stm\n")); |
| 455 | |
| 456 | if (high - low > 3) |
| 457 | as_bad (_("Invalid register list for ldm/stm\n")); |
| 458 | |
| 459 | if (high - low != 1 |
| 460 | && low % 4) |
| 461 | as_bad (_("Invalid register list for ldm/stm\n")); |
| 462 | |
| 463 | /* Even sicker. We encode two registers into op->reg. One |
| 464 | for the low register to save, the other for the high |
| 465 | register to save; we also set the high bit in op->reg |
| 466 | so we know this is "very special". */ |
| 467 | op->reg = 0x80000000 | (high << 8) | low; |
| 468 | op->mode = REG; |
| 469 | if (src[7] == ')') |
| 470 | *ptr = src + 8; |
| 471 | else |
| 472 | *ptr = src + 7; |
| 473 | return; |
| 474 | } |
| 475 | |
| 476 | len = parse_reg (src, &op->mode, &op->reg, direction); |
| 477 | if (len) |
| 478 | { |
| 479 | *ptr = src + len; |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | if (*src == '@') |
| 484 | { |
| 485 | src++; |
| 486 | if (*src == '@') |
| 487 | { |
| 488 | src++; |
| 489 | src = parse_exp (src, &op->exp); |
| 490 | |
| 491 | src = skip_colonthing (src, &op->exp, &op->mode); |
| 492 | |
| 493 | *ptr = src; |
| 494 | |
| 495 | op->mode = MEMIND; |
| 496 | return; |
| 497 | } |
| 498 | |
| 499 | if (*src == '-') |
| 500 | { |
| 501 | src++; |
| 502 | len = parse_reg (src, &mode, &num, direction); |
| 503 | if (len == 0) |
| 504 | { |
| 505 | /* Oops, not a reg after all, must be ordinary exp. */ |
| 506 | src--; |
| 507 | /* Must be a symbol. */ |
| 508 | op->mode = ABS | PSIZE | direction; |
| 509 | *ptr = skip_colonthing (parse_exp (src, &op->exp), |
| 510 | &op->exp, &op->mode); |
| 511 | |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | if ((mode & SIZE) != PSIZE) |
| 516 | as_bad (_("Wrong size pointer register for architecture.")); |
| 517 | op->mode = RDDEC; |
| 518 | op->reg = num; |
| 519 | *ptr = src + len; |
| 520 | return; |
| 521 | } |
| 522 | if (*src == '(') |
| 523 | { |
| 524 | /* Disp. */ |
| 525 | src++; |
| 526 | |
| 527 | /* Start off assuming a 16 bit offset. */ |
| 528 | |
| 529 | src = parse_exp (src, &op->exp); |
| 530 | |
| 531 | src = colonmod24 (op, src); |
| 532 | |
| 533 | if (*src == ')') |
| 534 | { |
| 535 | src++; |
| 536 | op->mode |= ABS | direction; |
| 537 | *ptr = src; |
| 538 | return; |
| 539 | } |
| 540 | |
| 541 | if (*src != ',') |
| 542 | { |
| 543 | as_bad (_("expected @(exp, reg16)")); |
| 544 | return; |
| 545 | |
| 546 | } |
| 547 | src++; |
| 548 | |
| 549 | len = parse_reg (src, &mode, &op->reg, direction); |
| 550 | if (len == 0 || !(mode & REG)) |
| 551 | { |
| 552 | as_bad (_("expected @(exp, reg16)")); |
| 553 | return; |
| 554 | } |
| 555 | op->mode |= DISP | direction; |
| 556 | dispreg = op->reg; |
| 557 | src += len; |
| 558 | src = skip_colonthing (src, &op->exp, &op->mode); |
| 559 | |
| 560 | if (*src != ')' && '(') |
| 561 | { |
| 562 | as_bad (_("expected @(exp, reg16)")); |
| 563 | return; |
| 564 | } |
| 565 | *ptr = src + 1; |
| 566 | |
| 567 | return; |
| 568 | } |
| 569 | len = parse_reg (src, &mode, &num, direction); |
| 570 | |
| 571 | if (len) |
| 572 | { |
| 573 | src += len; |
| 574 | if (*src == '+') |
| 575 | { |
| 576 | src++; |
| 577 | if ((mode & SIZE) != PSIZE) |
| 578 | as_bad (_("Wrong size pointer register for architecture.")); |
| 579 | op->mode = RSINC; |
| 580 | op->reg = num; |
| 581 | *ptr = src; |
| 582 | return; |
| 583 | } |
| 584 | if ((mode & SIZE) != PSIZE) |
| 585 | as_bad (_("Wrong size pointer register for architecture.")); |
| 586 | |
| 587 | op->mode = direction | IND | PSIZE; |
| 588 | op->reg = num; |
| 589 | *ptr = src; |
| 590 | |
| 591 | return; |
| 592 | } |
| 593 | else |
| 594 | { |
| 595 | /* must be a symbol */ |
| 596 | |
| 597 | op->mode = ABS | direction; |
| 598 | src = parse_exp (src, &op->exp); |
| 599 | |
| 600 | *ptr = colonmod24 (op, src); |
| 601 | |
| 602 | return; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | if (*src == '#') |
| 607 | { |
| 608 | src++; |
| 609 | op->mode = IMM; |
| 610 | src = parse_exp (src, &op->exp); |
| 611 | *ptr = skip_colonthing (src, &op->exp, &op->mode); |
| 612 | |
| 613 | return; |
| 614 | } |
| 615 | else if (strncmp (src, "mach", 4) == 0 |
| 616 | || strncmp (src, "macl", 4) == 0) |
| 617 | { |
| 618 | op->reg = src[3] == 'l'; |
| 619 | op->mode = MACREG; |
| 620 | *ptr = src + 4; |
| 621 | return; |
| 622 | } |
| 623 | else |
| 624 | { |
| 625 | src = parse_exp (src, &op->exp); |
| 626 | /* Trailing ':' size ? */ |
| 627 | if (*src == ':') |
| 628 | { |
| 629 | if (src[1] == '1' && src[2] == '6') |
| 630 | { |
| 631 | op->mode = PCREL | L_16; |
| 632 | src += 3; |
| 633 | } |
| 634 | else if (src[1] == '8') |
| 635 | { |
| 636 | op->mode = PCREL | L_8; |
| 637 | src += 2; |
| 638 | } |
| 639 | else |
| 640 | as_bad (_("expect :8 or :16 here")); |
| 641 | } |
| 642 | else |
| 643 | op->mode = PCREL | bsize; |
| 644 | |
| 645 | *ptr = src; |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | static char * |
| 650 | get_operands (noperands, op_end, operand) |
| 651 | unsigned int noperands; |
| 652 | char *op_end; |
| 653 | struct h8_op *operand; |
| 654 | { |
| 655 | char *ptr = op_end; |
| 656 | |
| 657 | switch (noperands) |
| 658 | { |
| 659 | case 0: |
| 660 | operand[0].mode = 0; |
| 661 | operand[1].mode = 0; |
| 662 | break; |
| 663 | |
| 664 | case 1: |
| 665 | ptr++; |
| 666 | get_operand (&ptr, operand + 0, 0, SRC); |
| 667 | if (*ptr == ',') |
| 668 | { |
| 669 | ptr++; |
| 670 | get_operand (&ptr, operand + 1, 1, DST); |
| 671 | } |
| 672 | else |
| 673 | { |
| 674 | operand[1].mode = 0; |
| 675 | } |
| 676 | break; |
| 677 | |
| 678 | case 2: |
| 679 | ptr++; |
| 680 | get_operand (&ptr, operand + 0, 0, SRC); |
| 681 | if (*ptr == ',') |
| 682 | ptr++; |
| 683 | get_operand (&ptr, operand + 1, 1, DST); |
| 684 | break; |
| 685 | |
| 686 | default: |
| 687 | abort (); |
| 688 | } |
| 689 | |
| 690 | return ptr; |
| 691 | } |
| 692 | |
| 693 | /* Passed a pointer to a list of opcodes which use different |
| 694 | addressing modes, return the opcode which matches the opcodes |
| 695 | provided. */ |
| 696 | |
| 697 | static struct h8_opcode * |
| 698 | get_specific (opcode, operands, size) |
| 699 | struct h8_opcode *opcode; |
| 700 | struct h8_op *operands; |
| 701 | int size; |
| 702 | { |
| 703 | struct h8_opcode *this_try = opcode; |
| 704 | int found = 0; |
| 705 | int this_index = opcode->idx; |
| 706 | |
| 707 | /* There's only one ldm/stm and it's easier to just |
| 708 | get out quick for them. */ |
| 709 | if (strcmp (opcode->name, "stm.l") == 0 |
| 710 | || strcmp (opcode->name, "ldm.l") == 0) |
| 711 | return this_try; |
| 712 | |
| 713 | while (this_index == opcode->idx && !found) |
| 714 | { |
| 715 | found = 1; |
| 716 | |
| 717 | this_try = opcode++; |
| 718 | if (this_try->noperands == 0) |
| 719 | { |
| 720 | int this_size; |
| 721 | |
| 722 | this_size = this_try->how & SN; |
| 723 | if (this_size != size && (this_size != SB || size != SN)) |
| 724 | found = 0; |
| 725 | } |
| 726 | else |
| 727 | { |
| 728 | int i; |
| 729 | |
| 730 | for (i = 0; i < this_try->noperands && found; i++) |
| 731 | { |
| 732 | op_type op = this_try->args.nib[i]; |
| 733 | int x = operands[i].mode; |
| 734 | |
| 735 | if ((op & (DISP | REG)) == (DISP | REG) |
| 736 | && ((x & (DISP | REG)) == (DISP | REG))) |
| 737 | { |
| 738 | dispreg = operands[i].reg; |
| 739 | } |
| 740 | else if (op & REG) |
| 741 | { |
| 742 | if (!(x & REG)) |
| 743 | found = 0; |
| 744 | |
| 745 | if (x & L_P) |
| 746 | x = (x & ~L_P) | (Hmode ? L_32 : L_16); |
| 747 | if (op & L_P) |
| 748 | op = (op & ~L_P) | (Hmode ? L_32 : L_16); |
| 749 | |
| 750 | opsize = op & SIZE; |
| 751 | |
| 752 | /* The size of the reg is v important. */ |
| 753 | if ((op & SIZE) != (x & SIZE)) |
| 754 | found = 0; |
| 755 | } |
| 756 | else if ((op & ABSJMP) && (x & ABS)) |
| 757 | { |
| 758 | operands[i].mode &= ~ABS; |
| 759 | operands[i].mode |= ABSJMP; |
| 760 | /* But it may not be 24 bits long. */ |
| 761 | if (!Hmode) |
| 762 | { |
| 763 | operands[i].mode &= ~SIZE; |
| 764 | operands[i].mode |= L_16; |
| 765 | } |
| 766 | } |
| 767 | else if ((op & (KBIT | DBIT)) && (x & IMM)) |
| 768 | { |
| 769 | /* This is ok if the immediate value is sensible. */ |
| 770 | } |
| 771 | else if (op & PCREL) |
| 772 | { |
| 773 | /* The size of the displacement is important. */ |
| 774 | if ((op & SIZE) != (x & SIZE)) |
| 775 | found = 0; |
| 776 | } |
| 777 | else if ((op & (DISP | IMM | ABS)) |
| 778 | && (op & (DISP | IMM | ABS)) == (x & (DISP | IMM | ABS))) |
| 779 | { |
| 780 | /* Promote a L_24 to L_32 if it makes us match. */ |
| 781 | if ((x & L_24) && (op & L_32)) |
| 782 | { |
| 783 | x &= ~L_24; |
| 784 | x |= L_32; |
| 785 | } |
| 786 | /* Promote an L8 to L_16 if it makes us match. */ |
| 787 | if (op & ABS && op & L_8 && op & DISP) |
| 788 | { |
| 789 | if (x & L_16) |
| 790 | found = 1; |
| 791 | } |
| 792 | else if ((x & SIZE) != 0 |
| 793 | && ((op & SIZE) != (x & SIZE))) |
| 794 | found = 0; |
| 795 | } |
| 796 | else if ((op & MACREG) != (x & MACREG)) |
| 797 | { |
| 798 | found = 0; |
| 799 | } |
| 800 | else if ((op & MODE) != (x & MODE)) |
| 801 | { |
| 802 | found = 0; |
| 803 | } |
| 804 | } |
| 805 | } |
| 806 | } |
| 807 | if (found) |
| 808 | return this_try; |
| 809 | else |
| 810 | return 0; |
| 811 | } |
| 812 | |
| 813 | static void |
| 814 | check_operand (operand, width, string) |
| 815 | struct h8_op *operand; |
| 816 | unsigned int width; |
| 817 | char *string; |
| 818 | { |
| 819 | if (operand->exp.X_add_symbol == 0 |
| 820 | && operand->exp.X_op_symbol == 0) |
| 821 | { |
| 822 | /* No symbol involved, let's look at offset, it's dangerous if |
| 823 | any of the high bits are not 0 or ff's, find out by oring or |
| 824 | anding with the width and seeing if the answer is 0 or all |
| 825 | fs. */ |
| 826 | |
| 827 | if ((operand->exp.X_add_number & ~width) != 0 && |
| 828 | (operand->exp.X_add_number | width) != (unsigned)(~0)) |
| 829 | { |
| 830 | if (width == 255 |
| 831 | && (operand->exp.X_add_number & 0xff00) == 0xff00) |
| 832 | { |
| 833 | /* Just ignore this one - which happens when trying to |
| 834 | fit a 16 bit address truncated into an 8 bit address |
| 835 | of something like bset. */ |
| 836 | } |
| 837 | else if (strcmp (string, "@") == 0 |
| 838 | && width == 0xffff |
| 839 | && (operand->exp.X_add_number & 0xff8000) == 0xff8000) |
| 840 | { |
| 841 | /* Just ignore this one - which happens when trying to |
| 842 | fit a 24 bit address truncated into a 16 bit address |
| 843 | of something like mov.w. */ |
| 844 | } |
| 845 | else |
| 846 | { |
| 847 | as_warn (_("operand %s0x%lx out of range."), string, |
| 848 | (unsigned long) operand->exp.X_add_number); |
| 849 | } |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | /* RELAXMODE has one of 3 values: |
| 855 | |
| 856 | 0 Output a "normal" reloc, no relaxing possible for this insn/reloc |
| 857 | |
| 858 | 1 Output a relaxable 24bit absolute mov.w address relocation |
| 859 | (may relax into a 16bit absolute address). |
| 860 | |
| 861 | 2 Output a relaxable 16/24 absolute mov.b address relocation |
| 862 | (may relax into an 8bit absolute address). */ |
| 863 | |
| 864 | static void |
| 865 | do_a_fix_imm (offset, operand, relaxmode) |
| 866 | int offset; |
| 867 | struct h8_op *operand; |
| 868 | int relaxmode; |
| 869 | { |
| 870 | int idx; |
| 871 | int size; |
| 872 | int where; |
| 873 | |
| 874 | char *t = operand->mode & IMM ? "#" : "@"; |
| 875 | |
| 876 | if (operand->exp.X_add_symbol == 0) |
| 877 | { |
| 878 | char *bytes = frag_now->fr_literal + offset; |
| 879 | switch (operand->mode & SIZE) |
| 880 | { |
| 881 | case L_2: |
| 882 | check_operand (operand, 0x3, t); |
| 883 | bytes[0] |= (operand->exp.X_add_number) << 4; |
| 884 | break; |
| 885 | case L_3: |
| 886 | check_operand (operand, 0x7, t); |
| 887 | bytes[0] |= (operand->exp.X_add_number) << 4; |
| 888 | break; |
| 889 | case L_8: |
| 890 | check_operand (operand, 0xff, t); |
| 891 | bytes[0] = operand->exp.X_add_number; |
| 892 | break; |
| 893 | case L_16: |
| 894 | check_operand (operand, 0xffff, t); |
| 895 | bytes[0] = operand->exp.X_add_number >> 8; |
| 896 | bytes[1] = operand->exp.X_add_number >> 0; |
| 897 | break; |
| 898 | case L_24: |
| 899 | check_operand (operand, 0xffffff, t); |
| 900 | bytes[0] = operand->exp.X_add_number >> 16; |
| 901 | bytes[1] = operand->exp.X_add_number >> 8; |
| 902 | bytes[2] = operand->exp.X_add_number >> 0; |
| 903 | break; |
| 904 | |
| 905 | case L_32: |
| 906 | /* This should be done with bfd. */ |
| 907 | bytes[0] = operand->exp.X_add_number >> 24; |
| 908 | bytes[1] = operand->exp.X_add_number >> 16; |
| 909 | bytes[2] = operand->exp.X_add_number >> 8; |
| 910 | bytes[3] = operand->exp.X_add_number >> 0; |
| 911 | if (relaxmode != 0) |
| 912 | { |
| 913 | idx = (relaxmode == 2) ? R_MOV24B1 : R_MOVL1; |
| 914 | fix_new_exp (frag_now, offset, 4, &operand->exp, 0, idx); |
| 915 | } |
| 916 | break; |
| 917 | } |
| 918 | } |
| 919 | else |
| 920 | { |
| 921 | switch (operand->mode & SIZE) |
| 922 | { |
| 923 | case L_24: |
| 924 | case L_32: |
| 925 | size = 4; |
| 926 | where = (operand->mode & SIZE) == L_24 ? -1 : 0; |
| 927 | if (relaxmode == 2) |
| 928 | idx = R_MOV24B1; |
| 929 | else if (relaxmode == 1) |
| 930 | idx = R_MOVL1; |
| 931 | else |
| 932 | idx = R_RELLONG; |
| 933 | break; |
| 934 | default: |
| 935 | as_bad (_("Can't work out size of operand.\n")); |
| 936 | case L_16: |
| 937 | size = 2; |
| 938 | where = 0; |
| 939 | if (relaxmode == 2) |
| 940 | idx = R_MOV16B1; |
| 941 | else |
| 942 | idx = R_RELWORD; |
| 943 | operand->exp.X_add_number = |
| 944 | ((operand->exp.X_add_number & 0xffff) ^ 0x8000) - 0x8000; |
| 945 | break; |
| 946 | case L_8: |
| 947 | size = 1; |
| 948 | where = 0; |
| 949 | idx = R_RELBYTE; |
| 950 | operand->exp.X_add_number = |
| 951 | ((operand->exp.X_add_number & 0xff) ^ 0x80) - 0x80; |
| 952 | } |
| 953 | |
| 954 | fix_new_exp (frag_now, |
| 955 | offset + where, |
| 956 | size, |
| 957 | &operand->exp, |
| 958 | 0, |
| 959 | idx); |
| 960 | } |
| 961 | } |
| 962 | |
| 963 | /* Now we know what sort of opcodes it is, let's build the bytes. */ |
| 964 | |
| 965 | static void |
| 966 | build_bytes (this_try, operand) |
| 967 | struct h8_opcode *this_try; |
| 968 | struct h8_op *operand; |
| 969 | { |
| 970 | int i; |
| 971 | char *output = frag_more (this_try->length); |
| 972 | op_type *nibble_ptr = this_try->data.nib; |
| 973 | op_type c; |
| 974 | unsigned int nibble_count = 0; |
| 975 | int absat = 0; |
| 976 | int immat = 0; |
| 977 | int nib = 0; |
| 978 | int movb = 0; |
| 979 | char asnibbles[30]; |
| 980 | char *p = asnibbles; |
| 981 | |
| 982 | if (!(this_try->inbase || Hmode)) |
| 983 | as_warn (_("Opcode `%s' with these operand types not available in H8/300 mode"), |
| 984 | this_try->name); |
| 985 | |
| 986 | while (*nibble_ptr != E) |
| 987 | { |
| 988 | int d; |
| 989 | c = *nibble_ptr++; |
| 990 | |
| 991 | d = (c & (DST | SRC_IN_DST)) != 0; |
| 992 | |
| 993 | if (c < 16) |
| 994 | nib = c; |
| 995 | else |
| 996 | { |
| 997 | if (c & (REG | IND | INC | DEC)) |
| 998 | nib = operand[d].reg; |
| 999 | |
| 1000 | else if ((c & DISPREG) == (DISPREG)) |
| 1001 | nib = dispreg; |
| 1002 | |
| 1003 | else if (c & ABS) |
| 1004 | { |
| 1005 | operand[d].mode = c; |
| 1006 | absat = nibble_count / 2; |
| 1007 | nib = 0; |
| 1008 | } |
| 1009 | else if (c & (IMM | PCREL | ABS | ABSJMP | DISP)) |
| 1010 | { |
| 1011 | operand[d].mode = c; |
| 1012 | immat = nibble_count / 2; |
| 1013 | nib = 0; |
| 1014 | } |
| 1015 | else if (c & IGNORE) |
| 1016 | nib = 0; |
| 1017 | |
| 1018 | else if (c & DBIT) |
| 1019 | { |
| 1020 | switch (operand[0].exp.X_add_number) |
| 1021 | { |
| 1022 | case 1: |
| 1023 | nib = c; |
| 1024 | break; |
| 1025 | case 2: |
| 1026 | nib = 0x8 | c; |
| 1027 | break; |
| 1028 | default: |
| 1029 | as_bad (_("Need #1 or #2 here")); |
| 1030 | } |
| 1031 | } |
| 1032 | else if (c & KBIT) |
| 1033 | { |
| 1034 | switch (operand[0].exp.X_add_number) |
| 1035 | { |
| 1036 | case 1: |
| 1037 | nib = 0; |
| 1038 | break; |
| 1039 | case 2: |
| 1040 | nib = 8; |
| 1041 | break; |
| 1042 | case 4: |
| 1043 | if (!Hmode) |
| 1044 | as_warn (_("#4 not valid on H8/300.")); |
| 1045 | nib = 9; |
| 1046 | break; |
| 1047 | |
| 1048 | default: |
| 1049 | as_bad (_("Need #1 or #2 here")); |
| 1050 | break; |
| 1051 | } |
| 1052 | /* Stop it making a fix. */ |
| 1053 | operand[0].mode = 0; |
| 1054 | } |
| 1055 | |
| 1056 | if (c & MEMRELAX) |
| 1057 | operand[d].mode |= MEMRELAX; |
| 1058 | |
| 1059 | if (c & B31) |
| 1060 | nib |= 0x8; |
| 1061 | |
| 1062 | if (c & MACREG) |
| 1063 | { |
| 1064 | if (operand[0].mode == MACREG) |
| 1065 | /* stmac has mac[hl] as the first operand. */ |
| 1066 | nib = 2 + operand[0].reg; |
| 1067 | else |
| 1068 | /* ldmac has mac[hl] as the second operand. */ |
| 1069 | nib = 2 + operand[1].reg; |
| 1070 | } |
| 1071 | } |
| 1072 | nibble_count++; |
| 1073 | |
| 1074 | *p++ = nib; |
| 1075 | } |
| 1076 | |
| 1077 | /* Disgusting. Why, oh why didn't someone ask us for advice |
| 1078 | on the assembler format. */ |
| 1079 | if (strcmp (this_try->name, "stm.l") == 0 |
| 1080 | || strcmp (this_try->name, "ldm.l") == 0) |
| 1081 | { |
| 1082 | int high, low; |
| 1083 | high = (operand[this_try->name[0] == 'l' ? 1 : 0].reg >> 8) & 0xf; |
| 1084 | low = operand[this_try->name[0] == 'l' ? 1 : 0].reg & 0xf; |
| 1085 | |
| 1086 | asnibbles[2] = high - low; |
| 1087 | asnibbles[7] = (this_try->name[0] == 'l') ? high : low; |
| 1088 | } |
| 1089 | |
| 1090 | for (i = 0; i < this_try->length; i++) |
| 1091 | output[i] = (asnibbles[i * 2] << 4) | asnibbles[i * 2 + 1]; |
| 1092 | |
| 1093 | /* Note if this is a movb instruction -- there's a special relaxation |
| 1094 | which only applies to them. */ |
| 1095 | if (strcmp (this_try->name, "mov.b") == 0) |
| 1096 | movb = 1; |
| 1097 | |
| 1098 | /* Output any fixes. */ |
| 1099 | for (i = 0; i < 2; i++) |
| 1100 | { |
| 1101 | int x = operand[i].mode; |
| 1102 | |
| 1103 | if (x & (IMM | DISP)) |
| 1104 | do_a_fix_imm (output - frag_now->fr_literal + immat, |
| 1105 | operand + i, (x & MEMRELAX) != 0); |
| 1106 | |
| 1107 | else if (x & ABS) |
| 1108 | do_a_fix_imm (output - frag_now->fr_literal + absat, |
| 1109 | operand + i, (x & MEMRELAX) ? movb + 1 : 0); |
| 1110 | |
| 1111 | else if (x & PCREL) |
| 1112 | { |
| 1113 | int size16 = x & (L_16); |
| 1114 | int where = size16 ? 2 : 1; |
| 1115 | int size = size16 ? 2 : 1; |
| 1116 | int type = size16 ? R_PCRWORD : R_PCRBYTE; |
| 1117 | fixS *fixP; |
| 1118 | |
| 1119 | check_operand (operand + i, size16 ? 0x7fff : 0x7f, "@"); |
| 1120 | |
| 1121 | if (operand[i].exp.X_add_number & 1) |
| 1122 | as_warn (_("branch operand has odd offset (%lx)\n"), |
| 1123 | (unsigned long) operand->exp.X_add_number); |
| 1124 | #ifndef OBJ_ELF |
| 1125 | /* The COFF port has always been off by one, changing it |
| 1126 | now would be an incompatible change, so we leave it as-is. |
| 1127 | |
| 1128 | We don't want to do this for ELF as we want to be |
| 1129 | compatible with the proposed ELF format from Hitachi. */ |
| 1130 | operand[i].exp.X_add_number -= 1; |
| 1131 | #endif |
| 1132 | operand[i].exp.X_add_number = |
| 1133 | ((operand[i].exp.X_add_number & 0xff) ^ 0x80) - 0x80; |
| 1134 | |
| 1135 | fixP = fix_new_exp (frag_now, |
| 1136 | output - frag_now->fr_literal + where, |
| 1137 | size, |
| 1138 | &operand[i].exp, |
| 1139 | 1, |
| 1140 | type); |
| 1141 | fixP->fx_signed = 1; |
| 1142 | } |
| 1143 | else if (x & MEMIND) |
| 1144 | { |
| 1145 | check_operand (operand + i, 0xff, "@@"); |
| 1146 | fix_new_exp (frag_now, |
| 1147 | output - frag_now->fr_literal + 1, |
| 1148 | 1, |
| 1149 | &operand[i].exp, |
| 1150 | 0, |
| 1151 | R_MEM_INDIRECT); |
| 1152 | } |
| 1153 | else if (x & ABSJMP) |
| 1154 | { |
| 1155 | int where = 0; |
| 1156 | |
| 1157 | #ifdef OBJ_ELF |
| 1158 | /* To be compatible with the proposed H8 ELF format, we |
| 1159 | want the relocation's offset to point to the first byte |
| 1160 | that will be modified, not to the start of the instruction. */ |
| 1161 | where += 1; |
| 1162 | #endif |
| 1163 | |
| 1164 | /* This jmp may be a jump or a branch. */ |
| 1165 | |
| 1166 | check_operand (operand + i, Hmode ? 0xffffff : 0xffff, "@"); |
| 1167 | |
| 1168 | if (operand[i].exp.X_add_number & 1) |
| 1169 | as_warn (_("branch operand has odd offset (%lx)\n"), |
| 1170 | (unsigned long) operand->exp.X_add_number); |
| 1171 | |
| 1172 | if (!Hmode) |
| 1173 | operand[i].exp.X_add_number = |
| 1174 | ((operand[i].exp.X_add_number & 0xffff) ^ 0x8000) - 0x8000; |
| 1175 | fix_new_exp (frag_now, |
| 1176 | output - frag_now->fr_literal + where, |
| 1177 | 4, |
| 1178 | &operand[i].exp, |
| 1179 | 0, |
| 1180 | R_JMPL1); |
| 1181 | } |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | /* Try to give an intelligent error message for common and simple to |
| 1186 | detect errors. */ |
| 1187 | |
| 1188 | static void |
| 1189 | clever_message (opcode, operand) |
| 1190 | struct h8_opcode *opcode; |
| 1191 | struct h8_op *operand; |
| 1192 | { |
| 1193 | /* Find out if there was more than one possible opcode. */ |
| 1194 | |
| 1195 | if ((opcode + 1)->idx != opcode->idx) |
| 1196 | { |
| 1197 | int argn; |
| 1198 | |
| 1199 | /* Only one opcode of this flavour, try to guess which operand |
| 1200 | didn't match. */ |
| 1201 | for (argn = 0; argn < opcode->noperands; argn++) |
| 1202 | { |
| 1203 | switch (opcode->args.nib[argn]) |
| 1204 | { |
| 1205 | case RD16: |
| 1206 | if (operand[argn].mode != RD16) |
| 1207 | { |
| 1208 | as_bad (_("destination operand must be 16 bit register")); |
| 1209 | return; |
| 1210 | |
| 1211 | } |
| 1212 | break; |
| 1213 | |
| 1214 | case RS8: |
| 1215 | if (operand[argn].mode != RS8) |
| 1216 | { |
| 1217 | as_bad (_("source operand must be 8 bit register")); |
| 1218 | return; |
| 1219 | } |
| 1220 | break; |
| 1221 | |
| 1222 | case ABS16DST: |
| 1223 | if (operand[argn].mode != ABS16DST) |
| 1224 | { |
| 1225 | as_bad (_("destination operand must be 16bit absolute address")); |
| 1226 | return; |
| 1227 | } |
| 1228 | break; |
| 1229 | case RD8: |
| 1230 | if (operand[argn].mode != RD8) |
| 1231 | { |
| 1232 | as_bad (_("destination operand must be 8 bit register")); |
| 1233 | return; |
| 1234 | } |
| 1235 | break; |
| 1236 | |
| 1237 | case ABS16SRC: |
| 1238 | if (operand[argn].mode != ABS16SRC) |
| 1239 | { |
| 1240 | as_bad (_("source operand must be 16bit absolute address")); |
| 1241 | return; |
| 1242 | } |
| 1243 | break; |
| 1244 | |
| 1245 | } |
| 1246 | } |
| 1247 | } |
| 1248 | as_bad (_("invalid operands")); |
| 1249 | } |
| 1250 | |
| 1251 | /* This is the guts of the machine-dependent assembler. STR points to |
| 1252 | a machine dependent instruction. This function is supposed to emit |
| 1253 | the frags/bytes it assembles. */ |
| 1254 | |
| 1255 | void |
| 1256 | md_assemble (str) |
| 1257 | char *str; |
| 1258 | { |
| 1259 | char *op_start; |
| 1260 | char *op_end; |
| 1261 | struct h8_op operand[2]; |
| 1262 | struct h8_opcode *opcode; |
| 1263 | struct h8_opcode *prev_opcode; |
| 1264 | |
| 1265 | char *dot = 0; |
| 1266 | char c; |
| 1267 | int size; |
| 1268 | |
| 1269 | /* Drop leading whitespace. */ |
| 1270 | while (*str == ' ') |
| 1271 | str++; |
| 1272 | |
| 1273 | /* Find the op code end. */ |
| 1274 | for (op_start = op_end = str; |
| 1275 | *op_end != 0 && *op_end != ' '; |
| 1276 | op_end++) |
| 1277 | { |
| 1278 | if (*op_end == '.') |
| 1279 | { |
| 1280 | dot = op_end + 1; |
| 1281 | *op_end = 0; |
| 1282 | op_end += 2; |
| 1283 | break; |
| 1284 | } |
| 1285 | } |
| 1286 | |
| 1287 | if (op_end == op_start) |
| 1288 | { |
| 1289 | as_bad (_("can't find opcode ")); |
| 1290 | } |
| 1291 | c = *op_end; |
| 1292 | |
| 1293 | *op_end = 0; |
| 1294 | |
| 1295 | opcode = (struct h8_opcode *) hash_find (opcode_hash_control, |
| 1296 | op_start); |
| 1297 | |
| 1298 | if (opcode == NULL) |
| 1299 | { |
| 1300 | as_bad (_("unknown opcode")); |
| 1301 | return; |
| 1302 | } |
| 1303 | |
| 1304 | /* We used to set input_line_pointer to the result of get_operands, |
| 1305 | but that is wrong. Our caller assumes we don't change it. */ |
| 1306 | |
| 1307 | (void) get_operands (opcode->noperands, op_end, operand); |
| 1308 | *op_end = c; |
| 1309 | prev_opcode = opcode; |
| 1310 | |
| 1311 | size = SN; |
| 1312 | if (dot) |
| 1313 | { |
| 1314 | switch (*dot) |
| 1315 | { |
| 1316 | case 'b': |
| 1317 | size = SB; |
| 1318 | break; |
| 1319 | |
| 1320 | case 'w': |
| 1321 | size = SW; |
| 1322 | break; |
| 1323 | |
| 1324 | case 'l': |
| 1325 | size = SL; |
| 1326 | break; |
| 1327 | } |
| 1328 | } |
| 1329 | opcode = get_specific (opcode, operand, size); |
| 1330 | |
| 1331 | if (opcode == 0) |
| 1332 | { |
| 1333 | /* Couldn't find an opcode which matched the operands. */ |
| 1334 | char *where = frag_more (2); |
| 1335 | |
| 1336 | where[0] = 0x0; |
| 1337 | where[1] = 0x0; |
| 1338 | clever_message (prev_opcode, operand); |
| 1339 | |
| 1340 | return; |
| 1341 | } |
| 1342 | if (opcode->size && dot) |
| 1343 | { |
| 1344 | if (opcode->size != *dot) |
| 1345 | { |
| 1346 | as_warn (_("mismatch between opcode size and operand size")); |
| 1347 | } |
| 1348 | } |
| 1349 | |
| 1350 | build_bytes (opcode, operand); |
| 1351 | } |
| 1352 | |
| 1353 | #ifndef BFD_ASSEMBLER |
| 1354 | void |
| 1355 | tc_crawl_symbol_chain (headers) |
| 1356 | object_headers *headers ATTRIBUTE_UNUSED; |
| 1357 | { |
| 1358 | printf (_("call to tc_crawl_symbol_chain \n")); |
| 1359 | } |
| 1360 | #endif |
| 1361 | |
| 1362 | symbolS * |
| 1363 | md_undefined_symbol (name) |
| 1364 | char *name ATTRIBUTE_UNUSED; |
| 1365 | { |
| 1366 | return 0; |
| 1367 | } |
| 1368 | |
| 1369 | #ifndef BFD_ASSEMBLER |
| 1370 | void |
| 1371 | tc_headers_hook (headers) |
| 1372 | object_headers *headers ATTRIBUTE_UNUSED; |
| 1373 | { |
| 1374 | printf (_("call to tc_headers_hook \n")); |
| 1375 | } |
| 1376 | #endif |
| 1377 | |
| 1378 | /* Various routines to kill one day */ |
| 1379 | /* Equal to MAX_PRECISION in atof-ieee.c */ |
| 1380 | #define MAX_LITTLENUMS 6 |
| 1381 | |
| 1382 | /* Turn a string in input_line_pointer into a floating point constant |
| 1383 | of type TYPE, and store the appropriate bytes in *LITP. The number |
| 1384 | of LITTLENUMS emitted is stored in *SIZEP. An error message is |
| 1385 | returned, or NULL on OK. */ |
| 1386 | |
| 1387 | char * |
| 1388 | md_atof (type, litP, sizeP) |
| 1389 | char type; |
| 1390 | char *litP; |
| 1391 | int *sizeP; |
| 1392 | { |
| 1393 | int prec; |
| 1394 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; |
| 1395 | LITTLENUM_TYPE *wordP; |
| 1396 | char *t; |
| 1397 | |
| 1398 | switch (type) |
| 1399 | { |
| 1400 | case 'f': |
| 1401 | case 'F': |
| 1402 | case 's': |
| 1403 | case 'S': |
| 1404 | prec = 2; |
| 1405 | break; |
| 1406 | |
| 1407 | case 'd': |
| 1408 | case 'D': |
| 1409 | case 'r': |
| 1410 | case 'R': |
| 1411 | prec = 4; |
| 1412 | break; |
| 1413 | |
| 1414 | case 'x': |
| 1415 | case 'X': |
| 1416 | prec = 6; |
| 1417 | break; |
| 1418 | |
| 1419 | case 'p': |
| 1420 | case 'P': |
| 1421 | prec = 6; |
| 1422 | break; |
| 1423 | |
| 1424 | default: |
| 1425 | *sizeP = 0; |
| 1426 | return _("Bad call to MD_ATOF()"); |
| 1427 | } |
| 1428 | t = atof_ieee (input_line_pointer, type, words); |
| 1429 | if (t) |
| 1430 | input_line_pointer = t; |
| 1431 | |
| 1432 | *sizeP = prec * sizeof (LITTLENUM_TYPE); |
| 1433 | for (wordP = words; prec--;) |
| 1434 | { |
| 1435 | md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE)); |
| 1436 | litP += sizeof (LITTLENUM_TYPE); |
| 1437 | } |
| 1438 | return 0; |
| 1439 | } |
| 1440 | \f |
| 1441 | const char *md_shortopts = ""; |
| 1442 | struct option md_longopts[] = { |
| 1443 | {NULL, no_argument, NULL, 0} |
| 1444 | }; |
| 1445 | |
| 1446 | size_t md_longopts_size = sizeof (md_longopts); |
| 1447 | |
| 1448 | int |
| 1449 | md_parse_option (c, arg) |
| 1450 | int c ATTRIBUTE_UNUSED; |
| 1451 | char *arg ATTRIBUTE_UNUSED; |
| 1452 | { |
| 1453 | return 0; |
| 1454 | } |
| 1455 | |
| 1456 | void |
| 1457 | md_show_usage (stream) |
| 1458 | FILE *stream ATTRIBUTE_UNUSED; |
| 1459 | { |
| 1460 | } |
| 1461 | \f |
| 1462 | void tc_aout_fix_to_chars PARAMS ((void)); |
| 1463 | |
| 1464 | void |
| 1465 | tc_aout_fix_to_chars () |
| 1466 | { |
| 1467 | printf (_("call to tc_aout_fix_to_chars \n")); |
| 1468 | abort (); |
| 1469 | } |
| 1470 | |
| 1471 | void |
| 1472 | md_convert_frag (headers, seg, fragP) |
| 1473 | #ifdef BFD_ASSEMBLER |
| 1474 | bfd *headers ATTRIBUTE_UNUSED; |
| 1475 | #else |
| 1476 | object_headers *headers ATTRIBUTE_UNUSED; |
| 1477 | #endif |
| 1478 | segT seg ATTRIBUTE_UNUSED; |
| 1479 | fragS *fragP ATTRIBUTE_UNUSED; |
| 1480 | { |
| 1481 | printf (_("call to md_convert_frag \n")); |
| 1482 | abort (); |
| 1483 | } |
| 1484 | |
| 1485 | #ifdef BFD_ASSEMBLER |
| 1486 | valueT |
| 1487 | md_section_align (segment, size) |
| 1488 | segT segment; |
| 1489 | valueT size; |
| 1490 | { |
| 1491 | int align = bfd_get_section_alignment (stdoutput, segment); |
| 1492 | return ((size + (1 << align) - 1) & (-1 << align)); |
| 1493 | } |
| 1494 | #else |
| 1495 | valueT |
| 1496 | md_section_align (seg, size) |
| 1497 | segT seg; |
| 1498 | valueT size; |
| 1499 | { |
| 1500 | return ((size + (1 << section_alignment[(int) seg]) - 1) |
| 1501 | & (-1 << section_alignment[(int) seg])); |
| 1502 | } |
| 1503 | #endif |
| 1504 | |
| 1505 | |
| 1506 | void |
| 1507 | md_apply_fix3 (fixP, valP, seg) |
| 1508 | fixS *fixP; |
| 1509 | valueT *valP; |
| 1510 | segT seg ATTRIBUTE_UNUSED; |
| 1511 | { |
| 1512 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 1513 | long val = * (long *) valP; |
| 1514 | |
| 1515 | switch (fixP->fx_size) |
| 1516 | { |
| 1517 | case 1: |
| 1518 | *buf++ = val; |
| 1519 | break; |
| 1520 | case 2: |
| 1521 | *buf++ = (val >> 8); |
| 1522 | *buf++ = val; |
| 1523 | break; |
| 1524 | case 4: |
| 1525 | *buf++ = (val >> 24); |
| 1526 | *buf++ = (val >> 16); |
| 1527 | *buf++ = (val >> 8); |
| 1528 | *buf++ = val; |
| 1529 | break; |
| 1530 | default: |
| 1531 | abort (); |
| 1532 | } |
| 1533 | |
| 1534 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) |
| 1535 | fixP->fx_done = 1; |
| 1536 | } |
| 1537 | |
| 1538 | int |
| 1539 | md_estimate_size_before_relax (fragP, segment_type) |
| 1540 | register fragS *fragP ATTRIBUTE_UNUSED; |
| 1541 | register segT segment_type ATTRIBUTE_UNUSED; |
| 1542 | { |
| 1543 | printf (_("call tomd_estimate_size_before_relax \n")); |
| 1544 | abort (); |
| 1545 | } |
| 1546 | |
| 1547 | /* Put number into target byte order. */ |
| 1548 | void |
| 1549 | md_number_to_chars (ptr, use, nbytes) |
| 1550 | char *ptr; |
| 1551 | valueT use; |
| 1552 | int nbytes; |
| 1553 | { |
| 1554 | number_to_chars_bigendian (ptr, use, nbytes); |
| 1555 | } |
| 1556 | |
| 1557 | long |
| 1558 | md_pcrel_from (fixP) |
| 1559 | fixS *fixP ATTRIBUTE_UNUSED; |
| 1560 | { |
| 1561 | abort (); |
| 1562 | } |
| 1563 | |
| 1564 | #ifndef BFD_ASSEMBLER |
| 1565 | void |
| 1566 | tc_reloc_mangle (fix_ptr, intr, base) |
| 1567 | fixS *fix_ptr; |
| 1568 | struct internal_reloc *intr; |
| 1569 | bfd_vma base; |
| 1570 | |
| 1571 | { |
| 1572 | symbolS *symbol_ptr; |
| 1573 | |
| 1574 | symbol_ptr = fix_ptr->fx_addsy; |
| 1575 | |
| 1576 | /* If this relocation is attached to a symbol then it's ok |
| 1577 | to output it. */ |
| 1578 | if (fix_ptr->fx_r_type == TC_CONS_RELOC) |
| 1579 | { |
| 1580 | /* cons likes to create reloc32's whatever the size of the reloc.. |
| 1581 | */ |
| 1582 | switch (fix_ptr->fx_size) |
| 1583 | { |
| 1584 | case 4: |
| 1585 | intr->r_type = R_RELLONG; |
| 1586 | break; |
| 1587 | case 2: |
| 1588 | intr->r_type = R_RELWORD; |
| 1589 | break; |
| 1590 | case 1: |
| 1591 | intr->r_type = R_RELBYTE; |
| 1592 | break; |
| 1593 | default: |
| 1594 | abort (); |
| 1595 | } |
| 1596 | } |
| 1597 | else |
| 1598 | { |
| 1599 | intr->r_type = fix_ptr->fx_r_type; |
| 1600 | } |
| 1601 | |
| 1602 | intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base; |
| 1603 | intr->r_offset = fix_ptr->fx_offset; |
| 1604 | |
| 1605 | if (symbol_ptr) |
| 1606 | { |
| 1607 | if (symbol_ptr->sy_number != -1) |
| 1608 | intr->r_symndx = symbol_ptr->sy_number; |
| 1609 | else |
| 1610 | { |
| 1611 | symbolS *segsym; |
| 1612 | |
| 1613 | /* This case arises when a reference is made to `.'. */ |
| 1614 | segsym = seg_info (S_GET_SEGMENT (symbol_ptr))->dot; |
| 1615 | if (segsym == NULL) |
| 1616 | intr->r_symndx = -1; |
| 1617 | else |
| 1618 | { |
| 1619 | intr->r_symndx = segsym->sy_number; |
| 1620 | intr->r_offset += S_GET_VALUE (symbol_ptr); |
| 1621 | } |
| 1622 | } |
| 1623 | } |
| 1624 | else |
| 1625 | intr->r_symndx = -1; |
| 1626 | } |
| 1627 | #else /* BFD_ASSEMBLER */ |
| 1628 | arelent * |
| 1629 | tc_gen_reloc (section, fixp) |
| 1630 | asection *section ATTRIBUTE_UNUSED; |
| 1631 | fixS *fixp; |
| 1632 | { |
| 1633 | arelent *rel; |
| 1634 | bfd_reloc_code_real_type r_type; |
| 1635 | |
| 1636 | if (fixp->fx_addsy && fixp->fx_subsy) |
| 1637 | { |
| 1638 | if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy)) |
| 1639 | || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section) |
| 1640 | { |
| 1641 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1642 | "Difference of symbols in different sections is not supported"); |
| 1643 | return NULL; |
| 1644 | } |
| 1645 | } |
| 1646 | |
| 1647 | rel = (arelent *) xmalloc (sizeof (arelent)); |
| 1648 | rel->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 1649 | *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 1650 | rel->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 1651 | rel->addend = fixp->fx_offset; |
| 1652 | |
| 1653 | r_type = fixp->fx_r_type; |
| 1654 | |
| 1655 | #define DEBUG 0 |
| 1656 | #if DEBUG |
| 1657 | fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type)); |
| 1658 | fflush(stderr); |
| 1659 | #endif |
| 1660 | rel->howto = bfd_reloc_type_lookup (stdoutput, r_type); |
| 1661 | if (rel->howto == NULL) |
| 1662 | { |
| 1663 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1664 | _("Cannot represent relocation type %s"), |
| 1665 | bfd_get_reloc_code_name (r_type)); |
| 1666 | return NULL; |
| 1667 | } |
| 1668 | |
| 1669 | return rel; |
| 1670 | } |
| 1671 | #endif |