| 1 | /* tc-mn10200.c -- Assembler code for the Matsushita 10200 |
| 2 | Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <ctype.h> |
| 23 | #include "as.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "opcode/mn10200.h" |
| 26 | \f |
| 27 | /* Structure to hold information about predefined registers. */ |
| 28 | struct reg_name |
| 29 | { |
| 30 | const char *name; |
| 31 | int value; |
| 32 | }; |
| 33 | |
| 34 | /* Generic assembler global variables which must be defined by all |
| 35 | targets. */ |
| 36 | |
| 37 | /* Characters which always start a comment. */ |
| 38 | const char comment_chars[] = "#"; |
| 39 | |
| 40 | /* Characters which start a comment at the beginning of a line. */ |
| 41 | const char line_comment_chars[] = ";#"; |
| 42 | |
| 43 | /* Characters which may be used to separate multiple commands on a |
| 44 | single line. */ |
| 45 | const char line_separator_chars[] = ";"; |
| 46 | |
| 47 | /* Characters which are used to indicate an exponent in a floating |
| 48 | point number. */ |
| 49 | const char EXP_CHARS[] = "eE"; |
| 50 | |
| 51 | /* Characters which mean that a number is a floating point constant, |
| 52 | as in 0d1.0. */ |
| 53 | const char FLT_CHARS[] = "dD"; |
| 54 | \f |
| 55 | const relax_typeS md_relax_table[] = { |
| 56 | /* bCC relaxing */ |
| 57 | {0x81, -0x7e, 2, 1}, |
| 58 | {0x8004, -0x7ffb, 5, 2}, |
| 59 | {0x800006, -0x7ffff9, 7, 0}, |
| 60 | /* bCCx relaxing */ |
| 61 | {0x81, -0x7e, 3, 4}, |
| 62 | {0x8004, -0x7ffb, 6, 5}, |
| 63 | {0x800006, -0x7ffff9, 8, 0}, |
| 64 | /* jsr relaxing */ |
| 65 | {0x8004, -0x7ffb, 3, 7}, |
| 66 | {0x800006, -0x7ffff9, 5, 0}, |
| 67 | /* jmp relaxing */ |
| 68 | {0x81, -0x7e, 2, 9}, |
| 69 | {0x8004, -0x7ffb, 3, 10}, |
| 70 | {0x800006, -0x7ffff9, 5, 0}, |
| 71 | |
| 72 | }; |
| 73 | |
| 74 | /* Local functions. */ |
| 75 | static void mn10200_insert_operand PARAMS ((unsigned long *, unsigned long *, |
| 76 | const struct mn10200_operand *, |
| 77 | offsetT, char *, unsigned, |
| 78 | unsigned)); |
| 79 | static unsigned long check_operand PARAMS ((unsigned long, |
| 80 | const struct mn10200_operand *, |
| 81 | offsetT)); |
| 82 | static int reg_name_search PARAMS ((const struct reg_name *, int, const char *)); |
| 83 | static boolean data_register_name PARAMS ((expressionS *expressionP)); |
| 84 | static boolean address_register_name PARAMS ((expressionS *expressionP)); |
| 85 | static boolean other_register_name PARAMS ((expressionS *expressionP)); |
| 86 | |
| 87 | /* Fixups. */ |
| 88 | #define MAX_INSN_FIXUPS (5) |
| 89 | struct mn10200_fixup |
| 90 | { |
| 91 | expressionS exp; |
| 92 | int opindex; |
| 93 | bfd_reloc_code_real_type reloc; |
| 94 | }; |
| 95 | struct mn10200_fixup fixups[MAX_INSN_FIXUPS]; |
| 96 | static int fc; |
| 97 | \f |
| 98 | const char *md_shortopts = ""; |
| 99 | struct option md_longopts[] = { |
| 100 | {NULL, no_argument, NULL, 0} |
| 101 | }; |
| 102 | size_t md_longopts_size = sizeof (md_longopts); |
| 103 | |
| 104 | /* The target specific pseudo-ops which we support. */ |
| 105 | const pseudo_typeS md_pseudo_table[] = |
| 106 | { |
| 107 | { NULL, NULL, 0 } |
| 108 | }; |
| 109 | |
| 110 | /* Opcode hash table. */ |
| 111 | static struct hash_control *mn10200_hash; |
| 112 | |
| 113 | /* This table is sorted. Suitable for searching by a binary search. */ |
| 114 | static const struct reg_name data_registers[] = |
| 115 | { |
| 116 | { "d0", 0 }, |
| 117 | { "d1", 1 }, |
| 118 | { "d2", 2 }, |
| 119 | { "d3", 3 }, |
| 120 | }; |
| 121 | #define DATA_REG_NAME_CNT \ |
| 122 | (sizeof (data_registers) / sizeof (struct reg_name)) |
| 123 | |
| 124 | static const struct reg_name address_registers[] = |
| 125 | { |
| 126 | { "a0", 0 }, |
| 127 | { "a1", 1 }, |
| 128 | { "a2", 2 }, |
| 129 | { "a3", 3 }, |
| 130 | }; |
| 131 | #define ADDRESS_REG_NAME_CNT \ |
| 132 | (sizeof (address_registers) / sizeof (struct reg_name)) |
| 133 | |
| 134 | static const struct reg_name other_registers[] = |
| 135 | { |
| 136 | { "mdr", 0 }, |
| 137 | { "psw", 0 }, |
| 138 | }; |
| 139 | #define OTHER_REG_NAME_CNT \ |
| 140 | (sizeof (other_registers) / sizeof (struct reg_name)) |
| 141 | |
| 142 | /* reg_name_search does a binary search of the given register table |
| 143 | to see if "name" is a valid regiter name. Returns the register |
| 144 | number from the array on success, or -1 on failure. */ |
| 145 | |
| 146 | static int |
| 147 | reg_name_search (regs, regcount, name) |
| 148 | const struct reg_name *regs; |
| 149 | int regcount; |
| 150 | const char *name; |
| 151 | { |
| 152 | int middle, low, high; |
| 153 | int cmp; |
| 154 | |
| 155 | low = 0; |
| 156 | high = regcount - 1; |
| 157 | |
| 158 | do |
| 159 | { |
| 160 | middle = (low + high) / 2; |
| 161 | cmp = strcasecmp (name, regs[middle].name); |
| 162 | if (cmp < 0) |
| 163 | high = middle - 1; |
| 164 | else if (cmp > 0) |
| 165 | low = middle + 1; |
| 166 | else |
| 167 | return regs[middle].value; |
| 168 | } |
| 169 | while (low <= high); |
| 170 | return -1; |
| 171 | } |
| 172 | |
| 173 | /* Summary of register_name(). |
| 174 | * |
| 175 | * in: Input_line_pointer points to 1st char of operand. |
| 176 | * |
| 177 | * out: A expressionS. |
| 178 | * The operand may have been a register: in this case, X_op == O_register, |
| 179 | * X_add_number is set to the register number, and truth is returned. |
| 180 | * Input_line_pointer->(next non-blank) char after operand, or is in |
| 181 | * its original state. |
| 182 | */ |
| 183 | |
| 184 | static boolean |
| 185 | data_register_name (expressionP) |
| 186 | expressionS *expressionP; |
| 187 | { |
| 188 | int reg_number; |
| 189 | char *name; |
| 190 | char *start; |
| 191 | char c; |
| 192 | |
| 193 | /* Find the spelling of the operand. */ |
| 194 | start = name = input_line_pointer; |
| 195 | |
| 196 | c = get_symbol_end (); |
| 197 | reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name); |
| 198 | |
| 199 | /* Look to see if it's in the register table. */ |
| 200 | if (reg_number >= 0) |
| 201 | { |
| 202 | expressionP->X_op = O_register; |
| 203 | expressionP->X_add_number = reg_number; |
| 204 | |
| 205 | /* Make the rest nice. */ |
| 206 | expressionP->X_add_symbol = NULL; |
| 207 | expressionP->X_op_symbol = NULL; |
| 208 | |
| 209 | /* Put back the delimiting char. */ |
| 210 | *input_line_pointer = c; |
| 211 | return true; |
| 212 | } |
| 213 | else |
| 214 | { |
| 215 | /* Reset the line as if we had not done anything. */ |
| 216 | /* Put back the delimiting char. */ |
| 217 | *input_line_pointer = c; |
| 218 | |
| 219 | /* Reset input_line pointer. */ |
| 220 | input_line_pointer = start; |
| 221 | return false; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | /* Summary of register_name(). |
| 226 | * |
| 227 | * in: Input_line_pointer points to 1st char of operand. |
| 228 | * |
| 229 | * out: A expressionS. |
| 230 | * The operand may have been a register: in this case, X_op == O_register, |
| 231 | * X_add_number is set to the register number, and truth is returned. |
| 232 | * Input_line_pointer->(next non-blank) char after operand, or is in |
| 233 | * its original state. |
| 234 | */ |
| 235 | |
| 236 | static boolean |
| 237 | address_register_name (expressionP) |
| 238 | expressionS *expressionP; |
| 239 | { |
| 240 | int reg_number; |
| 241 | char *name; |
| 242 | char *start; |
| 243 | char c; |
| 244 | |
| 245 | /* Find the spelling of the operand. */ |
| 246 | start = name = input_line_pointer; |
| 247 | |
| 248 | c = get_symbol_end (); |
| 249 | reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name); |
| 250 | |
| 251 | /* Look to see if it's in the register table. */ |
| 252 | if (reg_number >= 0) |
| 253 | { |
| 254 | expressionP->X_op = O_register; |
| 255 | expressionP->X_add_number = reg_number; |
| 256 | |
| 257 | /* Make the rest nice. */ |
| 258 | expressionP->X_add_symbol = NULL; |
| 259 | expressionP->X_op_symbol = NULL; |
| 260 | |
| 261 | /* Put back the delimiting char. */ |
| 262 | *input_line_pointer = c; |
| 263 | return true; |
| 264 | } |
| 265 | else |
| 266 | { |
| 267 | /* Reset the line as if we had not done anything. */ |
| 268 | /* Put back the delimiting char. */ |
| 269 | *input_line_pointer = c; |
| 270 | |
| 271 | /* Reset input_line pointer. */ |
| 272 | input_line_pointer = start; |
| 273 | return false; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | /* Summary of register_name(). |
| 278 | * |
| 279 | * in: Input_line_pointer points to 1st char of operand. |
| 280 | * |
| 281 | * out: A expressionS. |
| 282 | * The operand may have been a register: in this case, X_op == O_register, |
| 283 | * X_add_number is set to the register number, and truth is returned. |
| 284 | * Input_line_pointer->(next non-blank) char after operand, or is in |
| 285 | * its original state. |
| 286 | */ |
| 287 | |
| 288 | static boolean |
| 289 | other_register_name (expressionP) |
| 290 | expressionS *expressionP; |
| 291 | { |
| 292 | int reg_number; |
| 293 | char *name; |
| 294 | char *start; |
| 295 | char c; |
| 296 | |
| 297 | /* Find the spelling of the operand. */ |
| 298 | start = name = input_line_pointer; |
| 299 | |
| 300 | c = get_symbol_end (); |
| 301 | reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name); |
| 302 | |
| 303 | /* Look to see if it's in the register table. */ |
| 304 | if (reg_number >= 0) |
| 305 | { |
| 306 | expressionP->X_op = O_register; |
| 307 | expressionP->X_add_number = reg_number; |
| 308 | |
| 309 | /* Make the rest nice. */ |
| 310 | expressionP->X_add_symbol = NULL; |
| 311 | expressionP->X_op_symbol = NULL; |
| 312 | |
| 313 | /* Put back the delimiting char. */ |
| 314 | *input_line_pointer = c; |
| 315 | return true; |
| 316 | } |
| 317 | else |
| 318 | { |
| 319 | /* Reset the line as if we had not done anything. */ |
| 320 | /* Put back the delimiting char. */ |
| 321 | *input_line_pointer = c; |
| 322 | |
| 323 | /* Reset input_line pointer. */ |
| 324 | input_line_pointer = start; |
| 325 | return false; |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | void |
| 330 | md_show_usage (stream) |
| 331 | FILE *stream; |
| 332 | { |
| 333 | fprintf (stream, _("MN10200 options:\n\ |
| 334 | none yet\n")); |
| 335 | } |
| 336 | |
| 337 | int |
| 338 | md_parse_option (c, arg) |
| 339 | int c; |
| 340 | char *arg; |
| 341 | { |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | symbolS * |
| 346 | md_undefined_symbol (name) |
| 347 | char *name; |
| 348 | { |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | char * |
| 353 | md_atof (type, litp, sizep) |
| 354 | int type; |
| 355 | char *litp; |
| 356 | int *sizep; |
| 357 | { |
| 358 | int prec; |
| 359 | LITTLENUM_TYPE words[4]; |
| 360 | char *t; |
| 361 | int i; |
| 362 | |
| 363 | switch (type) |
| 364 | { |
| 365 | case 'f': |
| 366 | prec = 2; |
| 367 | break; |
| 368 | |
| 369 | case 'd': |
| 370 | prec = 4; |
| 371 | break; |
| 372 | |
| 373 | default: |
| 374 | *sizep = 0; |
| 375 | return _("bad call to md_atof"); |
| 376 | } |
| 377 | |
| 378 | t = atof_ieee (input_line_pointer, type, words); |
| 379 | if (t) |
| 380 | input_line_pointer = t; |
| 381 | |
| 382 | *sizep = prec * 2; |
| 383 | |
| 384 | for (i = prec - 1; i >= 0; i--) |
| 385 | { |
| 386 | md_number_to_chars (litp, (valueT) words[i], 2); |
| 387 | litp += 2; |
| 388 | } |
| 389 | |
| 390 | return NULL; |
| 391 | } |
| 392 | |
| 393 | void |
| 394 | md_convert_frag (abfd, sec, fragP) |
| 395 | bfd *abfd; |
| 396 | asection *sec; |
| 397 | fragS *fragP; |
| 398 | { |
| 399 | static unsigned long label_count = 0; |
| 400 | char buf[40]; |
| 401 | |
| 402 | subseg_change (sec, 0); |
| 403 | if (fragP->fr_subtype == 0) |
| 404 | { |
| 405 | fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol, |
| 406 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 407 | fragP->fr_var = 0; |
| 408 | fragP->fr_fix += 2; |
| 409 | } |
| 410 | else if (fragP->fr_subtype == 1) |
| 411 | { |
| 412 | /* Reverse the condition of the first branch. */ |
| 413 | int offset = fragP->fr_fix; |
| 414 | int opcode = fragP->fr_literal[offset] & 0xff; |
| 415 | |
| 416 | switch (opcode) |
| 417 | { |
| 418 | case 0xe8: |
| 419 | opcode = 0xe9; |
| 420 | break; |
| 421 | case 0xe9: |
| 422 | opcode = 0xe8; |
| 423 | break; |
| 424 | case 0xe0: |
| 425 | opcode = 0xe2; |
| 426 | break; |
| 427 | case 0xe2: |
| 428 | opcode = 0xe0; |
| 429 | break; |
| 430 | case 0xe3: |
| 431 | opcode = 0xe1; |
| 432 | break; |
| 433 | case 0xe1: |
| 434 | opcode = 0xe3; |
| 435 | break; |
| 436 | case 0xe4: |
| 437 | opcode = 0xe6; |
| 438 | break; |
| 439 | case 0xe6: |
| 440 | opcode = 0xe4; |
| 441 | break; |
| 442 | case 0xe7: |
| 443 | opcode = 0xe5; |
| 444 | break; |
| 445 | case 0xe5: |
| 446 | opcode = 0xe7; |
| 447 | break; |
| 448 | default: |
| 449 | abort (); |
| 450 | } |
| 451 | fragP->fr_literal[offset] = opcode; |
| 452 | |
| 453 | /* Create a fixup for the reversed conditional branch. */ |
| 454 | sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++); |
| 455 | fix_new (fragP, fragP->fr_fix + 1, 1, |
| 456 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 457 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 458 | |
| 459 | /* Now create the unconditional branch + fixup to the |
| 460 | final target. */ |
| 461 | fragP->fr_literal[offset + 2] = 0xfc; |
| 462 | fix_new (fragP, fragP->fr_fix + 3, 2, fragP->fr_symbol, |
| 463 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 464 | fragP->fr_var = 0; |
| 465 | fragP->fr_fix += 5; |
| 466 | } |
| 467 | else if (fragP->fr_subtype == 2) |
| 468 | { |
| 469 | /* Reverse the condition of the first branch. */ |
| 470 | int offset = fragP->fr_fix; |
| 471 | int opcode = fragP->fr_literal[offset] & 0xff; |
| 472 | |
| 473 | switch (opcode) |
| 474 | { |
| 475 | case 0xe8: |
| 476 | opcode = 0xe9; |
| 477 | break; |
| 478 | case 0xe9: |
| 479 | opcode = 0xe8; |
| 480 | break; |
| 481 | case 0xe0: |
| 482 | opcode = 0xe2; |
| 483 | break; |
| 484 | case 0xe2: |
| 485 | opcode = 0xe0; |
| 486 | break; |
| 487 | case 0xe3: |
| 488 | opcode = 0xe1; |
| 489 | break; |
| 490 | case 0xe1: |
| 491 | opcode = 0xe3; |
| 492 | break; |
| 493 | case 0xe4: |
| 494 | opcode = 0xe6; |
| 495 | break; |
| 496 | case 0xe6: |
| 497 | opcode = 0xe4; |
| 498 | break; |
| 499 | case 0xe7: |
| 500 | opcode = 0xe5; |
| 501 | break; |
| 502 | case 0xe5: |
| 503 | opcode = 0xe7; |
| 504 | break; |
| 505 | default: |
| 506 | abort (); |
| 507 | } |
| 508 | fragP->fr_literal[offset] = opcode; |
| 509 | |
| 510 | /* Create a fixup for the reversed conditional branch. */ |
| 511 | sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++); |
| 512 | fix_new (fragP, fragP->fr_fix + 1, 1, |
| 513 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 514 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 515 | |
| 516 | /* Now create the unconditional branch + fixup to the |
| 517 | final target. */ |
| 518 | fragP->fr_literal[offset + 2] = 0xf4; |
| 519 | fragP->fr_literal[offset + 3] = 0xe0; |
| 520 | fix_new (fragP, fragP->fr_fix + 4, 4, fragP->fr_symbol, |
| 521 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 522 | fragP->fr_var = 0; |
| 523 | fragP->fr_fix += 7; |
| 524 | } |
| 525 | else if (fragP->fr_subtype == 3) |
| 526 | { |
| 527 | fix_new (fragP, fragP->fr_fix + 2, 1, fragP->fr_symbol, |
| 528 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 529 | fragP->fr_var = 0; |
| 530 | fragP->fr_fix += 3; |
| 531 | } |
| 532 | else if (fragP->fr_subtype == 4) |
| 533 | { |
| 534 | /* Reverse the condition of the first branch. */ |
| 535 | int offset = fragP->fr_fix; |
| 536 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 537 | |
| 538 | switch (opcode) |
| 539 | { |
| 540 | case 0xfc: |
| 541 | opcode = 0xfd; |
| 542 | break; |
| 543 | case 0xfd: |
| 544 | opcode = 0xfc; |
| 545 | break; |
| 546 | case 0xfe: |
| 547 | opcode = 0xff; |
| 548 | break; |
| 549 | case 0xff: |
| 550 | opcode = 0xfe; |
| 551 | case 0xe8: |
| 552 | opcode = 0xe9; |
| 553 | break; |
| 554 | case 0xe9: |
| 555 | opcode = 0xe8; |
| 556 | break; |
| 557 | case 0xe0: |
| 558 | opcode = 0xe2; |
| 559 | break; |
| 560 | case 0xe2: |
| 561 | opcode = 0xe0; |
| 562 | break; |
| 563 | case 0xe3: |
| 564 | opcode = 0xe1; |
| 565 | break; |
| 566 | case 0xe1: |
| 567 | opcode = 0xe3; |
| 568 | break; |
| 569 | case 0xe4: |
| 570 | opcode = 0xe6; |
| 571 | break; |
| 572 | case 0xe6: |
| 573 | opcode = 0xe4; |
| 574 | break; |
| 575 | case 0xe7: |
| 576 | opcode = 0xe5; |
| 577 | break; |
| 578 | case 0xe5: |
| 579 | opcode = 0xe7; |
| 580 | break; |
| 581 | case 0xec: |
| 582 | opcode = 0xed; |
| 583 | break; |
| 584 | case 0xed: |
| 585 | opcode = 0xec; |
| 586 | break; |
| 587 | case 0xee: |
| 588 | opcode = 0xef; |
| 589 | break; |
| 590 | case 0xef: |
| 591 | opcode = 0xee; |
| 592 | break; |
| 593 | default: |
| 594 | abort (); |
| 595 | } |
| 596 | fragP->fr_literal[offset + 1] = opcode; |
| 597 | |
| 598 | /* Create a fixup for the reversed conditional branch. */ |
| 599 | sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++); |
| 600 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 601 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 602 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 603 | |
| 604 | /* Now create the unconditional branch + fixup to the |
| 605 | final target. */ |
| 606 | fragP->fr_literal[offset + 3] = 0xfc; |
| 607 | fix_new (fragP, fragP->fr_fix + 4, 2, fragP->fr_symbol, |
| 608 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 609 | fragP->fr_var = 0; |
| 610 | fragP->fr_fix += 6; |
| 611 | } |
| 612 | else if (fragP->fr_subtype == 5) |
| 613 | { |
| 614 | /* Reverse the condition of the first branch. */ |
| 615 | int offset = fragP->fr_fix; |
| 616 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 617 | |
| 618 | switch (opcode) |
| 619 | { |
| 620 | case 0xfc: |
| 621 | opcode = 0xfd; |
| 622 | break; |
| 623 | case 0xfd: |
| 624 | opcode = 0xfc; |
| 625 | break; |
| 626 | case 0xfe: |
| 627 | opcode = 0xff; |
| 628 | break; |
| 629 | case 0xff: |
| 630 | opcode = 0xfe; |
| 631 | case 0xe8: |
| 632 | opcode = 0xe9; |
| 633 | break; |
| 634 | case 0xe9: |
| 635 | opcode = 0xe8; |
| 636 | break; |
| 637 | case 0xe0: |
| 638 | opcode = 0xe2; |
| 639 | break; |
| 640 | case 0xe2: |
| 641 | opcode = 0xe0; |
| 642 | break; |
| 643 | case 0xe3: |
| 644 | opcode = 0xe1; |
| 645 | break; |
| 646 | case 0xe1: |
| 647 | opcode = 0xe3; |
| 648 | break; |
| 649 | case 0xe4: |
| 650 | opcode = 0xe6; |
| 651 | break; |
| 652 | case 0xe6: |
| 653 | opcode = 0xe4; |
| 654 | break; |
| 655 | case 0xe7: |
| 656 | opcode = 0xe5; |
| 657 | break; |
| 658 | case 0xe5: |
| 659 | opcode = 0xe7; |
| 660 | break; |
| 661 | case 0xec: |
| 662 | opcode = 0xed; |
| 663 | break; |
| 664 | case 0xed: |
| 665 | opcode = 0xec; |
| 666 | break; |
| 667 | case 0xee: |
| 668 | opcode = 0xef; |
| 669 | break; |
| 670 | case 0xef: |
| 671 | opcode = 0xee; |
| 672 | break; |
| 673 | default: |
| 674 | abort (); |
| 675 | } |
| 676 | fragP->fr_literal[offset + 1] = opcode; |
| 677 | |
| 678 | /* Create a fixup for the reversed conditional branch. */ |
| 679 | sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++); |
| 680 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 681 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 682 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 683 | |
| 684 | /* Now create the unconditional branch + fixup to the |
| 685 | final target. */ |
| 686 | fragP->fr_literal[offset + 3] = 0xf4; |
| 687 | fragP->fr_literal[offset + 4] = 0xe0; |
| 688 | fix_new (fragP, fragP->fr_fix + 5, 4, fragP->fr_symbol, |
| 689 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 690 | fragP->fr_var = 0; |
| 691 | fragP->fr_fix += 8; |
| 692 | } |
| 693 | else if (fragP->fr_subtype == 6) |
| 694 | { |
| 695 | fix_new (fragP, fragP->fr_fix + 1, 2, fragP->fr_symbol, |
| 696 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 697 | fragP->fr_var = 0; |
| 698 | fragP->fr_fix += 3; |
| 699 | } |
| 700 | else if (fragP->fr_subtype == 7) |
| 701 | { |
| 702 | int offset = fragP->fr_fix; |
| 703 | fragP->fr_literal[offset] = 0xf4; |
| 704 | fragP->fr_literal[offset + 1] = 0xe1; |
| 705 | |
| 706 | fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol, |
| 707 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 708 | fragP->fr_var = 0; |
| 709 | fragP->fr_fix += 5; |
| 710 | } |
| 711 | else if (fragP->fr_subtype == 8) |
| 712 | { |
| 713 | fragP->fr_literal[fragP->fr_fix] = 0xea; |
| 714 | fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol, |
| 715 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 716 | fragP->fr_var = 0; |
| 717 | fragP->fr_fix += 2; |
| 718 | } |
| 719 | else if (fragP->fr_subtype == 9) |
| 720 | { |
| 721 | int offset = fragP->fr_fix; |
| 722 | fragP->fr_literal[offset] = 0xfc; |
| 723 | |
| 724 | fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol, |
| 725 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 726 | fragP->fr_var = 0; |
| 727 | fragP->fr_fix += 3; |
| 728 | } |
| 729 | else if (fragP->fr_subtype == 10) |
| 730 | { |
| 731 | int offset = fragP->fr_fix; |
| 732 | fragP->fr_literal[offset] = 0xf4; |
| 733 | fragP->fr_literal[offset + 1] = 0xe0; |
| 734 | |
| 735 | fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol, |
| 736 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 737 | fragP->fr_var = 0; |
| 738 | fragP->fr_fix += 5; |
| 739 | } |
| 740 | else |
| 741 | abort (); |
| 742 | } |
| 743 | |
| 744 | valueT |
| 745 | md_section_align (seg, addr) |
| 746 | asection *seg; |
| 747 | valueT addr; |
| 748 | { |
| 749 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 750 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 751 | } |
| 752 | |
| 753 | void |
| 754 | md_begin () |
| 755 | { |
| 756 | char *prev_name = ""; |
| 757 | register const struct mn10200_opcode *op; |
| 758 | |
| 759 | mn10200_hash = hash_new (); |
| 760 | |
| 761 | /* Insert unique names into hash table. The MN10200 instruction set |
| 762 | has many identical opcode names that have different opcodes based |
| 763 | on the operands. This hash table then provides a quick index to |
| 764 | the first opcode with a particular name in the opcode table. */ |
| 765 | |
| 766 | op = mn10200_opcodes; |
| 767 | while (op->name) |
| 768 | { |
| 769 | if (strcmp (prev_name, op->name)) |
| 770 | { |
| 771 | prev_name = (char *) op->name; |
| 772 | hash_insert (mn10200_hash, op->name, (char *) op); |
| 773 | } |
| 774 | op++; |
| 775 | } |
| 776 | |
| 777 | /* This is both a simplification (we don't have to write md_apply_fix) |
| 778 | and support for future optimizations (branch shortening and similar |
| 779 | stuff in the linker. */ |
| 780 | linkrelax = 1; |
| 781 | } |
| 782 | |
| 783 | void |
| 784 | md_assemble (str) |
| 785 | char *str; |
| 786 | { |
| 787 | char *s; |
| 788 | struct mn10200_opcode *opcode; |
| 789 | struct mn10200_opcode *next_opcode; |
| 790 | const unsigned char *opindex_ptr; |
| 791 | int next_opindex, relaxable; |
| 792 | unsigned long insn, extension, size = 0; |
| 793 | char *f; |
| 794 | int i; |
| 795 | int match; |
| 796 | |
| 797 | /* Get the opcode. */ |
| 798 | for (s = str; *s != '\0' && !isspace (*s); s++) |
| 799 | ; |
| 800 | if (*s != '\0') |
| 801 | *s++ = '\0'; |
| 802 | |
| 803 | /* Find the first opcode with the proper name. */ |
| 804 | opcode = (struct mn10200_opcode *) hash_find (mn10200_hash, str); |
| 805 | if (opcode == NULL) |
| 806 | { |
| 807 | as_bad (_("Unrecognized opcode: `%s'"), str); |
| 808 | return; |
| 809 | } |
| 810 | |
| 811 | str = s; |
| 812 | while (isspace (*str)) |
| 813 | ++str; |
| 814 | |
| 815 | input_line_pointer = str; |
| 816 | |
| 817 | for (;;) |
| 818 | { |
| 819 | const char *errmsg = NULL; |
| 820 | int op_idx; |
| 821 | char *hold; |
| 822 | int extra_shift = 0; |
| 823 | |
| 824 | relaxable = 0; |
| 825 | fc = 0; |
| 826 | match = 0; |
| 827 | next_opindex = 0; |
| 828 | insn = opcode->opcode; |
| 829 | extension = 0; |
| 830 | for (op_idx = 1, opindex_ptr = opcode->operands; |
| 831 | *opindex_ptr != 0; |
| 832 | opindex_ptr++, op_idx++) |
| 833 | { |
| 834 | const struct mn10200_operand *operand; |
| 835 | expressionS ex; |
| 836 | |
| 837 | if (next_opindex == 0) |
| 838 | { |
| 839 | operand = &mn10200_operands[*opindex_ptr]; |
| 840 | } |
| 841 | else |
| 842 | { |
| 843 | operand = &mn10200_operands[next_opindex]; |
| 844 | next_opindex = 0; |
| 845 | } |
| 846 | |
| 847 | errmsg = NULL; |
| 848 | |
| 849 | while (*str == ' ' || *str == ',') |
| 850 | ++str; |
| 851 | |
| 852 | if (operand->flags & MN10200_OPERAND_RELAX) |
| 853 | relaxable = 1; |
| 854 | |
| 855 | /* Gather the operand. */ |
| 856 | hold = input_line_pointer; |
| 857 | input_line_pointer = str; |
| 858 | |
| 859 | if (operand->flags & MN10200_OPERAND_PAREN) |
| 860 | { |
| 861 | if (*input_line_pointer != ')' && *input_line_pointer != '(') |
| 862 | { |
| 863 | input_line_pointer = hold; |
| 864 | str = hold; |
| 865 | goto error; |
| 866 | } |
| 867 | input_line_pointer++; |
| 868 | goto keep_going; |
| 869 | } |
| 870 | /* See if we can match the operands. */ |
| 871 | else if (operand->flags & MN10200_OPERAND_DREG) |
| 872 | { |
| 873 | if (!data_register_name (&ex)) |
| 874 | { |
| 875 | input_line_pointer = hold; |
| 876 | str = hold; |
| 877 | goto error; |
| 878 | } |
| 879 | } |
| 880 | else if (operand->flags & MN10200_OPERAND_AREG) |
| 881 | { |
| 882 | if (!address_register_name (&ex)) |
| 883 | { |
| 884 | input_line_pointer = hold; |
| 885 | str = hold; |
| 886 | goto error; |
| 887 | } |
| 888 | } |
| 889 | else if (operand->flags & MN10200_OPERAND_PSW) |
| 890 | { |
| 891 | char *start = input_line_pointer; |
| 892 | char c = get_symbol_end (); |
| 893 | |
| 894 | if (strcmp (start, "psw") != 0) |
| 895 | { |
| 896 | *input_line_pointer = c; |
| 897 | input_line_pointer = hold; |
| 898 | str = hold; |
| 899 | goto error; |
| 900 | } |
| 901 | *input_line_pointer = c; |
| 902 | goto keep_going; |
| 903 | } |
| 904 | else if (operand->flags & MN10200_OPERAND_MDR) |
| 905 | { |
| 906 | char *start = input_line_pointer; |
| 907 | char c = get_symbol_end (); |
| 908 | |
| 909 | if (strcmp (start, "mdr") != 0) |
| 910 | { |
| 911 | *input_line_pointer = c; |
| 912 | input_line_pointer = hold; |
| 913 | str = hold; |
| 914 | goto error; |
| 915 | } |
| 916 | *input_line_pointer = c; |
| 917 | goto keep_going; |
| 918 | } |
| 919 | else if (data_register_name (&ex)) |
| 920 | { |
| 921 | input_line_pointer = hold; |
| 922 | str = hold; |
| 923 | goto error; |
| 924 | } |
| 925 | else if (address_register_name (&ex)) |
| 926 | { |
| 927 | input_line_pointer = hold; |
| 928 | str = hold; |
| 929 | goto error; |
| 930 | } |
| 931 | else if (other_register_name (&ex)) |
| 932 | { |
| 933 | input_line_pointer = hold; |
| 934 | str = hold; |
| 935 | goto error; |
| 936 | } |
| 937 | else if (*str == ')' || *str == '(') |
| 938 | { |
| 939 | input_line_pointer = hold; |
| 940 | str = hold; |
| 941 | goto error; |
| 942 | } |
| 943 | else |
| 944 | { |
| 945 | expression (&ex); |
| 946 | } |
| 947 | |
| 948 | switch (ex.X_op) |
| 949 | { |
| 950 | case O_illegal: |
| 951 | errmsg = _("illegal operand"); |
| 952 | goto error; |
| 953 | case O_absent: |
| 954 | errmsg = _("missing operand"); |
| 955 | goto error; |
| 956 | case O_register: |
| 957 | if ((operand->flags |
| 958 | & (MN10200_OPERAND_DREG | MN10200_OPERAND_AREG)) == 0) |
| 959 | { |
| 960 | input_line_pointer = hold; |
| 961 | str = hold; |
| 962 | goto error; |
| 963 | } |
| 964 | |
| 965 | if (opcode->format == FMT_2 || opcode->format == FMT_5) |
| 966 | extra_shift = 8; |
| 967 | else if (opcode->format == FMT_3 || opcode->format == FMT_6 |
| 968 | || opcode->format == FMT_7) |
| 969 | extra_shift = 16; |
| 970 | else |
| 971 | extra_shift = 0; |
| 972 | |
| 973 | mn10200_insert_operand (&insn, &extension, operand, |
| 974 | ex.X_add_number, (char *) NULL, |
| 975 | 0, extra_shift); |
| 976 | |
| 977 | break; |
| 978 | |
| 979 | case O_constant: |
| 980 | /* If this operand can be promoted, and it doesn't |
| 981 | fit into the allocated bitfield for this insn, |
| 982 | then promote it (ie this opcode does not match). */ |
| 983 | if (operand->flags |
| 984 | & (MN10200_OPERAND_PROMOTE | MN10200_OPERAND_RELAX) |
| 985 | && !check_operand (insn, operand, ex.X_add_number)) |
| 986 | { |
| 987 | input_line_pointer = hold; |
| 988 | str = hold; |
| 989 | goto error; |
| 990 | } |
| 991 | |
| 992 | mn10200_insert_operand (&insn, &extension, operand, |
| 993 | ex.X_add_number, (char *) NULL, |
| 994 | 0, 0); |
| 995 | break; |
| 996 | |
| 997 | default: |
| 998 | /* If this operand can be promoted, then this opcode didn't |
| 999 | match since we can't know if it needed promotion! */ |
| 1000 | if (operand->flags & MN10200_OPERAND_PROMOTE) |
| 1001 | { |
| 1002 | input_line_pointer = hold; |
| 1003 | str = hold; |
| 1004 | goto error; |
| 1005 | } |
| 1006 | |
| 1007 | /* We need to generate a fixup for this expression. */ |
| 1008 | if (fc >= MAX_INSN_FIXUPS) |
| 1009 | as_fatal (_("too many fixups")); |
| 1010 | fixups[fc].exp = ex; |
| 1011 | fixups[fc].opindex = *opindex_ptr; |
| 1012 | fixups[fc].reloc = BFD_RELOC_UNUSED; |
| 1013 | ++fc; |
| 1014 | break; |
| 1015 | } |
| 1016 | |
| 1017 | keep_going: |
| 1018 | str = input_line_pointer; |
| 1019 | input_line_pointer = hold; |
| 1020 | |
| 1021 | while (*str == ' ' || *str == ',') |
| 1022 | ++str; |
| 1023 | |
| 1024 | } |
| 1025 | |
| 1026 | /* Make sure we used all the operands! */ |
| 1027 | if (*str != ',') |
| 1028 | match = 1; |
| 1029 | |
| 1030 | error: |
| 1031 | if (match == 0) |
| 1032 | { |
| 1033 | next_opcode = opcode + 1; |
| 1034 | if (!strcmp (next_opcode->name, opcode->name)) |
| 1035 | { |
| 1036 | opcode = next_opcode; |
| 1037 | continue; |
| 1038 | } |
| 1039 | |
| 1040 | as_bad ("%s", errmsg); |
| 1041 | return; |
| 1042 | } |
| 1043 | break; |
| 1044 | } |
| 1045 | |
| 1046 | while (isspace (*str)) |
| 1047 | ++str; |
| 1048 | |
| 1049 | if (*str != '\0') |
| 1050 | as_bad (_("junk at end of line: `%s'"), str); |
| 1051 | |
| 1052 | input_line_pointer = str; |
| 1053 | |
| 1054 | if (opcode->format == FMT_1) |
| 1055 | size = 1; |
| 1056 | else if (opcode->format == FMT_2 || opcode->format == FMT_4) |
| 1057 | size = 2; |
| 1058 | else if (opcode->format == FMT_3 || opcode->format == FMT_5) |
| 1059 | size = 3; |
| 1060 | else if (opcode->format == FMT_6) |
| 1061 | size = 4; |
| 1062 | else if (opcode->format == FMT_7) |
| 1063 | size = 5; |
| 1064 | else |
| 1065 | abort (); |
| 1066 | |
| 1067 | /* Write out the instruction. */ |
| 1068 | |
| 1069 | if (relaxable && fc > 0) |
| 1070 | { |
| 1071 | int type; |
| 1072 | |
| 1073 | /* bCC */ |
| 1074 | if (size == 2 && opcode->opcode != 0xfc0000) |
| 1075 | { |
| 1076 | /* Handle bra specially. Basically treat it like jmp so |
| 1077 | that we automatically handle 8, 16 and 32 bit offsets |
| 1078 | correctly as well as jumps to an undefined address. |
| 1079 | |
| 1080 | It is also important to not treat it like other bCC |
| 1081 | instructions since the long forms of bra is different |
| 1082 | from other bCC instructions. */ |
| 1083 | if (opcode->opcode == 0xea00) |
| 1084 | type = 8; |
| 1085 | else |
| 1086 | type = 0; |
| 1087 | } |
| 1088 | /* jsr */ |
| 1089 | else if (size == 3 && opcode->opcode == 0xfd0000) |
| 1090 | type = 6; |
| 1091 | /* jmp */ |
| 1092 | else if (size == 3 && opcode->opcode == 0xfc0000) |
| 1093 | type = 8; |
| 1094 | /* bCCx */ |
| 1095 | else |
| 1096 | type = 3; |
| 1097 | |
| 1098 | f = frag_var (rs_machine_dependent, 8, 8 - size, type, |
| 1099 | fixups[0].exp.X_add_symbol, |
| 1100 | fixups[0].exp.X_add_number, |
| 1101 | (char *)fixups[0].opindex); |
| 1102 | number_to_chars_bigendian (f, insn, size); |
| 1103 | if (8 - size > 4) |
| 1104 | { |
| 1105 | number_to_chars_bigendian (f + size, 0, 4); |
| 1106 | number_to_chars_bigendian (f + size + 4, 0, 8 - size - 4); |
| 1107 | } |
| 1108 | else |
| 1109 | number_to_chars_bigendian (f + size, 0, 8 - size); |
| 1110 | } |
| 1111 | |
| 1112 | else |
| 1113 | { |
| 1114 | f = frag_more (size); |
| 1115 | |
| 1116 | /* Oh, what a mess. The instruction is in big endian format, but |
| 1117 | 16 and 24bit immediates are little endian! */ |
| 1118 | if (opcode->format == FMT_3) |
| 1119 | { |
| 1120 | number_to_chars_bigendian (f, (insn >> 16) & 0xff, 1); |
| 1121 | number_to_chars_littleendian (f + 1, insn & 0xffff, 2); |
| 1122 | } |
| 1123 | else if (opcode->format == FMT_6) |
| 1124 | { |
| 1125 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 1126 | number_to_chars_littleendian (f + 2, insn & 0xffff, 2); |
| 1127 | } |
| 1128 | else if (opcode->format == FMT_7) |
| 1129 | { |
| 1130 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 1131 | number_to_chars_littleendian (f + 2, insn & 0xffff, 2); |
| 1132 | number_to_chars_littleendian (f + 4, extension & 0xff, 1); |
| 1133 | } |
| 1134 | else |
| 1135 | { |
| 1136 | number_to_chars_bigendian (f, insn, size > 4 ? 4 : size); |
| 1137 | } |
| 1138 | |
| 1139 | /* Create any fixups. */ |
| 1140 | for (i = 0; i < fc; i++) |
| 1141 | { |
| 1142 | const struct mn10200_operand *operand; |
| 1143 | |
| 1144 | operand = &mn10200_operands[fixups[i].opindex]; |
| 1145 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
| 1146 | { |
| 1147 | reloc_howto_type *reloc_howto; |
| 1148 | int size; |
| 1149 | int offset; |
| 1150 | fixS *fixP; |
| 1151 | |
| 1152 | reloc_howto = bfd_reloc_type_lookup (stdoutput, |
| 1153 | fixups[i].reloc); |
| 1154 | |
| 1155 | if (!reloc_howto) |
| 1156 | abort (); |
| 1157 | |
| 1158 | size = bfd_get_reloc_size (reloc_howto); |
| 1159 | |
| 1160 | if (size < 1 || size > 4) |
| 1161 | abort (); |
| 1162 | |
| 1163 | offset = 4 - size; |
| 1164 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, |
| 1165 | size, |
| 1166 | &fixups[i].exp, |
| 1167 | reloc_howto->pc_relative, |
| 1168 | fixups[i].reloc); |
| 1169 | |
| 1170 | /* PC-relative offsets are from the first byte of the |
| 1171 | next instruction, not from the start of the current |
| 1172 | instruction. */ |
| 1173 | if (reloc_howto->pc_relative) |
| 1174 | fixP->fx_offset += size; |
| 1175 | } |
| 1176 | else |
| 1177 | { |
| 1178 | int reloc, pcrel, reloc_size, offset; |
| 1179 | fixS *fixP; |
| 1180 | |
| 1181 | reloc = BFD_RELOC_NONE; |
| 1182 | /* How big is the reloc? Remember SPLIT relocs are |
| 1183 | implicitly 32bits. */ |
| 1184 | reloc_size = operand->bits; |
| 1185 | |
| 1186 | offset = size - reloc_size / 8; |
| 1187 | |
| 1188 | /* Is the reloc pc-relative? */ |
| 1189 | pcrel = (operand->flags & MN10200_OPERAND_PCREL) != 0; |
| 1190 | |
| 1191 | /* Choose a proper BFD relocation type. */ |
| 1192 | if (pcrel) |
| 1193 | { |
| 1194 | if (reloc_size == 8) |
| 1195 | reloc = BFD_RELOC_8_PCREL; |
| 1196 | else if (reloc_size == 24) |
| 1197 | reloc = BFD_RELOC_24_PCREL; |
| 1198 | else |
| 1199 | abort (); |
| 1200 | } |
| 1201 | else |
| 1202 | { |
| 1203 | if (reloc_size == 32) |
| 1204 | reloc = BFD_RELOC_32; |
| 1205 | else if (reloc_size == 16) |
| 1206 | reloc = BFD_RELOC_16; |
| 1207 | else if (reloc_size == 8) |
| 1208 | reloc = BFD_RELOC_8; |
| 1209 | else if (reloc_size == 24) |
| 1210 | reloc = BFD_RELOC_24; |
| 1211 | else |
| 1212 | abort (); |
| 1213 | } |
| 1214 | |
| 1215 | /* Convert the size of the reloc into what fix_new_exp |
| 1216 | wants. */ |
| 1217 | reloc_size = reloc_size / 8; |
| 1218 | if (reloc_size == 8) |
| 1219 | reloc_size = 0; |
| 1220 | else if (reloc_size == 16) |
| 1221 | reloc_size = 1; |
| 1222 | else if (reloc_size == 32 || reloc_size == 24) |
| 1223 | reloc_size = 2; |
| 1224 | |
| 1225 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, |
| 1226 | reloc_size, &fixups[i].exp, pcrel, |
| 1227 | ((bfd_reloc_code_real_type) reloc)); |
| 1228 | |
| 1229 | /* PC-relative offsets are from the first byte of the |
| 1230 | next instruction, not from the start of the current |
| 1231 | instruction. */ |
| 1232 | if (pcrel) |
| 1233 | fixP->fx_offset += size; |
| 1234 | } |
| 1235 | } |
| 1236 | } |
| 1237 | } |
| 1238 | |
| 1239 | /* If while processing a fixup, a reloc really needs to be created |
| 1240 | Then it is done here. */ |
| 1241 | |
| 1242 | arelent * |
| 1243 | tc_gen_reloc (seg, fixp) |
| 1244 | asection *seg; |
| 1245 | fixS *fixp; |
| 1246 | { |
| 1247 | arelent *reloc; |
| 1248 | reloc = (arelent *) xmalloc (sizeof (arelent)); |
| 1249 | |
| 1250 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 1251 | if (reloc->howto == (reloc_howto_type *) NULL) |
| 1252 | { |
| 1253 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1254 | _("reloc %d not supported by object file format"), |
| 1255 | (int) fixp->fx_r_type); |
| 1256 | return NULL; |
| 1257 | } |
| 1258 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 1259 | |
| 1260 | if (fixp->fx_addsy && fixp->fx_subsy) |
| 1261 | { |
| 1262 | if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy)) |
| 1263 | || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section) |
| 1264 | { |
| 1265 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1266 | "Difference of symbols in different sections is not supported"); |
| 1267 | return NULL; |
| 1268 | } |
| 1269 | reloc->sym_ptr_ptr = &bfd_abs_symbol; |
| 1270 | reloc->addend = (S_GET_VALUE (fixp->fx_addsy) |
| 1271 | - S_GET_VALUE (fixp->fx_subsy) + fixp->fx_offset); |
| 1272 | } |
| 1273 | else |
| 1274 | { |
| 1275 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 1276 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 1277 | reloc->addend = fixp->fx_offset; |
| 1278 | } |
| 1279 | return reloc; |
| 1280 | } |
| 1281 | |
| 1282 | int |
| 1283 | md_estimate_size_before_relax (fragp, seg) |
| 1284 | fragS *fragp; |
| 1285 | asection *seg; |
| 1286 | { |
| 1287 | if (fragp->fr_subtype == 0) |
| 1288 | return 2; |
| 1289 | if (fragp->fr_subtype == 3) |
| 1290 | return 3; |
| 1291 | if (fragp->fr_subtype == 6) |
| 1292 | { |
| 1293 | if (!S_IS_DEFINED (fragp->fr_symbol) |
| 1294 | || seg != S_GET_SEGMENT (fragp->fr_symbol)) |
| 1295 | { |
| 1296 | fragp->fr_subtype = 7; |
| 1297 | return 5; |
| 1298 | } |
| 1299 | return 3; |
| 1300 | } |
| 1301 | if (fragp->fr_subtype == 8) |
| 1302 | { |
| 1303 | if (!S_IS_DEFINED (fragp->fr_symbol)) |
| 1304 | { |
| 1305 | fragp->fr_subtype = 10; |
| 1306 | return 5; |
| 1307 | } |
| 1308 | return 2; |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | long |
| 1313 | md_pcrel_from (fixp) |
| 1314 | fixS *fixp; |
| 1315 | { |
| 1316 | return fixp->fx_frag->fr_address; |
| 1317 | #if 0 |
| 1318 | if (fixp->fx_addsy != (symbolS *) NULL && !S_IS_DEFINED (fixp->fx_addsy)) |
| 1319 | { |
| 1320 | /* The symbol is undefined. Let the linker figure it out. */ |
| 1321 | return 0; |
| 1322 | } |
| 1323 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 1324 | #endif |
| 1325 | } |
| 1326 | |
| 1327 | int |
| 1328 | md_apply_fix3 (fixp, valuep, seg) |
| 1329 | fixS *fixp; |
| 1330 | valueT *valuep; |
| 1331 | segT seg; |
| 1332 | { |
| 1333 | /* We shouldn't ever get here because linkrelax is nonzero. */ |
| 1334 | abort (); |
| 1335 | fixp->fx_done = 1; |
| 1336 | return 0; |
| 1337 | } |
| 1338 | |
| 1339 | /* Insert an operand value into an instruction. */ |
| 1340 | |
| 1341 | static void |
| 1342 | mn10200_insert_operand (insnp, extensionp, operand, val, file, line, shift) |
| 1343 | unsigned long *insnp; |
| 1344 | unsigned long *extensionp; |
| 1345 | const struct mn10200_operand *operand; |
| 1346 | offsetT val; |
| 1347 | char *file; |
| 1348 | unsigned int line; |
| 1349 | unsigned int shift; |
| 1350 | { |
| 1351 | /* No need to check 24 or 32bit operands for a bit. */ |
| 1352 | if (operand->bits < 24 |
| 1353 | && (operand->flags & MN10200_OPERAND_NOCHECK) == 0) |
| 1354 | { |
| 1355 | long min, max; |
| 1356 | offsetT test; |
| 1357 | |
| 1358 | if ((operand->flags & MN10200_OPERAND_SIGNED) != 0) |
| 1359 | { |
| 1360 | max = (1 << (operand->bits - 1)) - 1; |
| 1361 | min = - (1 << (operand->bits - 1)); |
| 1362 | } |
| 1363 | else |
| 1364 | { |
| 1365 | max = (1 << operand->bits) - 1; |
| 1366 | min = 0; |
| 1367 | } |
| 1368 | |
| 1369 | test = val; |
| 1370 | |
| 1371 | if (test < (offsetT) min || test > (offsetT) max) |
| 1372 | { |
| 1373 | const char *err = |
| 1374 | _("operand out of range (%s not between %ld and %ld)"); |
| 1375 | char buf[100]; |
| 1376 | |
| 1377 | sprint_value (buf, test); |
| 1378 | if (file == (char *) NULL) |
| 1379 | as_warn (err, buf, min, max); |
| 1380 | else |
| 1381 | as_warn_where (file, line, err, buf, min, max); |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | if ((operand->flags & MN10200_OPERAND_EXTENDED) == 0) |
| 1386 | { |
| 1387 | *insnp |= (((long) val & ((1 << operand->bits) - 1)) |
| 1388 | << (operand->shift + shift)); |
| 1389 | |
| 1390 | if ((operand->flags & MN10200_OPERAND_REPEATED) != 0) |
| 1391 | *insnp |= (((long) val & ((1 << operand->bits) - 1)) |
| 1392 | << (operand->shift + shift + 2)); |
| 1393 | } |
| 1394 | else |
| 1395 | { |
| 1396 | *extensionp |= (val >> 16) & 0xff; |
| 1397 | *insnp |= val & 0xffff; |
| 1398 | } |
| 1399 | } |
| 1400 | |
| 1401 | static unsigned long |
| 1402 | check_operand (insn, operand, val) |
| 1403 | unsigned long insn; |
| 1404 | const struct mn10200_operand *operand; |
| 1405 | offsetT val; |
| 1406 | { |
| 1407 | /* No need to check 24bit or 32bit operands for a bit. */ |
| 1408 | if (operand->bits < 24 |
| 1409 | && (operand->flags & MN10200_OPERAND_NOCHECK) == 0) |
| 1410 | { |
| 1411 | long min, max; |
| 1412 | offsetT test; |
| 1413 | |
| 1414 | if ((operand->flags & MN10200_OPERAND_SIGNED) != 0) |
| 1415 | { |
| 1416 | max = (1 << (operand->bits - 1)) - 1; |
| 1417 | min = - (1 << (operand->bits - 1)); |
| 1418 | } |
| 1419 | else |
| 1420 | { |
| 1421 | max = (1 << operand->bits) - 1; |
| 1422 | min = 0; |
| 1423 | } |
| 1424 | |
| 1425 | test = val; |
| 1426 | |
| 1427 | if (test < (offsetT) min || test > (offsetT) max) |
| 1428 | return 0; |
| 1429 | else |
| 1430 | return 1; |
| 1431 | } |
| 1432 | return 1; |
| 1433 | } |