| 1 | /* Disassemble MN10300 instructions. |
| 2 | Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | |
| 21 | #include "ansidecl.h" |
| 22 | #include "opcode/mn10300.h" |
| 23 | #include "dis-asm.h" |
| 24 | #include "opintl.h" |
| 25 | |
| 26 | static void disassemble PARAMS ((bfd_vma, struct disassemble_info *, |
| 27 | unsigned long insn, unsigned int)); |
| 28 | |
| 29 | int |
| 30 | print_insn_mn10300 (memaddr, info) |
| 31 | bfd_vma memaddr; |
| 32 | struct disassemble_info *info; |
| 33 | { |
| 34 | int status; |
| 35 | bfd_byte buffer[4]; |
| 36 | unsigned long insn; |
| 37 | unsigned int consume; |
| 38 | |
| 39 | /* First figure out how big the opcode is. */ |
| 40 | status = (*info->read_memory_func) (memaddr, buffer, 1, info); |
| 41 | if (status != 0) |
| 42 | { |
| 43 | (*info->memory_error_func) (status, memaddr, info); |
| 44 | return -1; |
| 45 | } |
| 46 | insn = *(unsigned char *) buffer; |
| 47 | |
| 48 | /* These are one byte insns. */ |
| 49 | if ((insn & 0xf3) == 0x00 |
| 50 | || (insn & 0xf0) == 0x10 |
| 51 | || (insn & 0xfc) == 0x3c |
| 52 | || (insn & 0xf3) == 0x41 |
| 53 | || (insn & 0xf3) == 0x40 |
| 54 | || (insn & 0xfc) == 0x50 |
| 55 | || (insn & 0xfc) == 0x54 |
| 56 | || (insn & 0xf0) == 0x60 |
| 57 | || (insn & 0xf0) == 0x70 |
| 58 | || ((insn & 0xf0) == 0x80 |
| 59 | && (insn & 0x0c) >> 2 != (insn & 0x03)) |
| 60 | || ((insn & 0xf0) == 0x90 |
| 61 | && (insn & 0x0c) >> 2 != (insn & 0x03)) |
| 62 | || ((insn & 0xf0) == 0xa0 |
| 63 | && (insn & 0x0c) >> 2 != (insn & 0x03)) |
| 64 | || ((insn & 0xf0) == 0xb0 |
| 65 | && (insn & 0x0c) >> 2 != (insn & 0x03)) |
| 66 | || (insn & 0xff) == 0xcb |
| 67 | || (insn & 0xfc) == 0xd0 |
| 68 | || (insn & 0xfc) == 0xd4 |
| 69 | || (insn & 0xfc) == 0xd8 |
| 70 | || (insn & 0xf0) == 0xe0 |
| 71 | || (insn & 0xff) == 0xff) |
| 72 | { |
| 73 | consume = 1; |
| 74 | } |
| 75 | |
| 76 | /* These are two byte insns. */ |
| 77 | else if ((insn & 0xf0) == 0x80 |
| 78 | || (insn & 0xf0) == 0x90 |
| 79 | || (insn & 0xf0) == 0xa0 |
| 80 | || (insn & 0xf0) == 0xb0 |
| 81 | || (insn & 0xfc) == 0x20 |
| 82 | || (insn & 0xfc) == 0x28 |
| 83 | || (insn & 0xf3) == 0x43 |
| 84 | || (insn & 0xf3) == 0x42 |
| 85 | || (insn & 0xfc) == 0x58 |
| 86 | || (insn & 0xfc) == 0x5c |
| 87 | || ((insn & 0xf0) == 0xc0 |
| 88 | && (insn & 0xff) != 0xcb |
| 89 | && (insn & 0xff) != 0xcc |
| 90 | && (insn & 0xff) != 0xcd) |
| 91 | || (insn & 0xff) == 0xf0 |
| 92 | || (insn & 0xff) == 0xf1 |
| 93 | || (insn & 0xff) == 0xf2 |
| 94 | || (insn & 0xff) == 0xf3 |
| 95 | || (insn & 0xff) == 0xf4 |
| 96 | || (insn & 0xff) == 0xf5 |
| 97 | || (insn & 0xff) == 0xf6) |
| 98 | { |
| 99 | status = (*info->read_memory_func) (memaddr, buffer, 2, info); |
| 100 | if (status != 0) |
| 101 | { |
| 102 | (*info->memory_error_func) (status, memaddr, info); |
| 103 | return -1; |
| 104 | } |
| 105 | insn = bfd_getb16 (buffer); |
| 106 | consume = 2; |
| 107 | } |
| 108 | |
| 109 | /* These are three byte insns. */ |
| 110 | else if ((insn & 0xff) == 0xf8 |
| 111 | || (insn & 0xff) == 0xcc |
| 112 | || (insn & 0xff) == 0xf9 |
| 113 | || (insn & 0xf3) == 0x01 |
| 114 | || (insn & 0xf3) == 0x02 |
| 115 | || (insn & 0xf3) == 0x03 |
| 116 | || (insn & 0xfc) == 0x24 |
| 117 | || (insn & 0xfc) == 0x2c |
| 118 | || (insn & 0xfc) == 0x30 |
| 119 | || (insn & 0xfc) == 0x34 |
| 120 | || (insn & 0xfc) == 0x38 |
| 121 | || (insn & 0xff) == 0xde |
| 122 | || (insn & 0xff) == 0xdf |
| 123 | || (insn & 0xff) == 0xcc) |
| 124 | { |
| 125 | status = (*info->read_memory_func) (memaddr, buffer, 2, info); |
| 126 | if (status != 0) |
| 127 | { |
| 128 | (*info->memory_error_func) (status, memaddr, info); |
| 129 | return -1; |
| 130 | } |
| 131 | insn = bfd_getb16 (buffer); |
| 132 | insn <<= 8; |
| 133 | status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info); |
| 134 | if (status != 0) |
| 135 | { |
| 136 | (*info->memory_error_func) (status, memaddr, info); |
| 137 | return -1; |
| 138 | } |
| 139 | insn |= *(unsigned char *)buffer; |
| 140 | consume = 3; |
| 141 | } |
| 142 | |
| 143 | /* These are four byte insns. */ |
| 144 | else if ((insn & 0xff) == 0xfa |
| 145 | || (insn & 0xff) == 0xfb) |
| 146 | { |
| 147 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 148 | if (status != 0) |
| 149 | { |
| 150 | (*info->memory_error_func) (status, memaddr, info); |
| 151 | return -1; |
| 152 | } |
| 153 | insn = bfd_getb32 (buffer); |
| 154 | consume = 4; |
| 155 | } |
| 156 | |
| 157 | /* These are five byte insns. */ |
| 158 | else if ((insn & 0xff) == 0xcd |
| 159 | || (insn & 0xff) == 0xdc) |
| 160 | { |
| 161 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 162 | if (status != 0) |
| 163 | { |
| 164 | (*info->memory_error_func) (status, memaddr, info); |
| 165 | return -1; |
| 166 | } |
| 167 | insn = bfd_getb32 (buffer); |
| 168 | consume = 5; |
| 169 | } |
| 170 | |
| 171 | /* These are six byte insns. */ |
| 172 | else if ((insn & 0xff) == 0xfd |
| 173 | || (insn & 0xff) == 0xfc) |
| 174 | { |
| 175 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 176 | if (status != 0) |
| 177 | { |
| 178 | (*info->memory_error_func) (status, memaddr, info); |
| 179 | return -1; |
| 180 | } |
| 181 | |
| 182 | insn = bfd_getb32 (buffer); |
| 183 | consume = 6; |
| 184 | } |
| 185 | |
| 186 | /* Else its a seven byte insns (in theory). */ |
| 187 | else |
| 188 | { |
| 189 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 190 | if (status != 0) |
| 191 | { |
| 192 | (*info->memory_error_func) (status, memaddr, info); |
| 193 | return -1; |
| 194 | } |
| 195 | |
| 196 | insn = bfd_getb32 (buffer); |
| 197 | consume = 7; |
| 198 | } |
| 199 | |
| 200 | disassemble (memaddr, info, insn, consume); |
| 201 | |
| 202 | return consume; |
| 203 | } |
| 204 | |
| 205 | static void |
| 206 | disassemble (memaddr, info, insn, size) |
| 207 | bfd_vma memaddr; |
| 208 | struct disassemble_info *info; |
| 209 | unsigned long insn; |
| 210 | unsigned int size; |
| 211 | { |
| 212 | struct mn10300_opcode *op = (struct mn10300_opcode *)mn10300_opcodes; |
| 213 | const struct mn10300_operand *operand; |
| 214 | bfd_byte buffer[4]; |
| 215 | unsigned long extension = 0; |
| 216 | int status, match = 0; |
| 217 | |
| 218 | /* Find the opcode. */ |
| 219 | while (op->name) |
| 220 | { |
| 221 | int mysize, extra_shift; |
| 222 | |
| 223 | if (op->format == FMT_S0) |
| 224 | mysize = 1; |
| 225 | else if (op->format == FMT_S1 |
| 226 | || op->format == FMT_D0) |
| 227 | mysize = 2; |
| 228 | else if (op->format == FMT_S2 |
| 229 | || op->format == FMT_D1) |
| 230 | mysize = 3; |
| 231 | else if (op->format == FMT_S4) |
| 232 | mysize = 5; |
| 233 | else if (op->format == FMT_D2) |
| 234 | mysize = 4; |
| 235 | else if (op->format == FMT_D4) |
| 236 | mysize = 6; |
| 237 | else |
| 238 | mysize = 7; |
| 239 | |
| 240 | if ((op->mask & insn) == op->opcode |
| 241 | && size == (unsigned int) mysize |
| 242 | && (op->machine == 0 |
| 243 | || op->machine == info->mach)) |
| 244 | { |
| 245 | const unsigned char *opindex_ptr; |
| 246 | unsigned int nocomma; |
| 247 | int paren = 0; |
| 248 | |
| 249 | if (op->format == FMT_D1 || op->format == FMT_S1) |
| 250 | extra_shift = 8; |
| 251 | else if (op->format == FMT_D2 || op->format == FMT_D4 |
| 252 | || op->format == FMT_S2 || op->format == FMT_S4 |
| 253 | || op->format == FMT_S6 || op->format == FMT_D5) |
| 254 | extra_shift = 16; |
| 255 | else |
| 256 | extra_shift = 0; |
| 257 | |
| 258 | if (size == 1 || size == 2) |
| 259 | { |
| 260 | extension = 0; |
| 261 | } |
| 262 | else if (size == 3 |
| 263 | && (op->format == FMT_D1 |
| 264 | || op->opcode == 0xdf0000 |
| 265 | || op->opcode == 0xde0000)) |
| 266 | { |
| 267 | extension = 0; |
| 268 | } |
| 269 | else if (size == 3) |
| 270 | { |
| 271 | insn &= 0xff0000; |
| 272 | status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info); |
| 273 | if (status != 0) |
| 274 | { |
| 275 | (*info->memory_error_func) (status, memaddr, info); |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | insn |= bfd_getl16 (buffer); |
| 280 | extension = 0; |
| 281 | } |
| 282 | else if (size == 4 |
| 283 | && (op->opcode == 0xfaf80000 |
| 284 | || op->opcode == 0xfaf00000 |
| 285 | || op->opcode == 0xfaf40000)) |
| 286 | { |
| 287 | extension = 0; |
| 288 | } |
| 289 | else if (size == 4) |
| 290 | { |
| 291 | insn &= 0xffff0000; |
| 292 | status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info); |
| 293 | if (status != 0) |
| 294 | { |
| 295 | (*info->memory_error_func) (status, memaddr, info); |
| 296 | return; |
| 297 | } |
| 298 | |
| 299 | insn |= bfd_getl16 (buffer); |
| 300 | extension = 0; |
| 301 | } |
| 302 | else if (size == 5 && op->opcode == 0xdc000000) |
| 303 | { |
| 304 | unsigned long temp = 0; |
| 305 | status = (*info->read_memory_func) (memaddr + 1, buffer, 4, info); |
| 306 | if (status != 0) |
| 307 | { |
| 308 | (*info->memory_error_func) (status, memaddr, info); |
| 309 | return; |
| 310 | } |
| 311 | temp |= bfd_getl32 (buffer); |
| 312 | |
| 313 | insn &= 0xff000000; |
| 314 | insn |= (temp & 0xffffff00) >> 8; |
| 315 | extension = temp & 0xff; |
| 316 | } |
| 317 | else if (size == 5) |
| 318 | { |
| 319 | unsigned long temp = 0; |
| 320 | status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info); |
| 321 | if (status != 0) |
| 322 | { |
| 323 | (*info->memory_error_func) (status, memaddr, info); |
| 324 | return; |
| 325 | } |
| 326 | temp |= bfd_getl16 (buffer); |
| 327 | |
| 328 | insn &= 0xff0000ff; |
| 329 | insn |= temp << 8; |
| 330 | |
| 331 | status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info); |
| 332 | if (status != 0) |
| 333 | { |
| 334 | (*info->memory_error_func) (status, memaddr, info); |
| 335 | return; |
| 336 | } |
| 337 | extension = *(unsigned char *)buffer; |
| 338 | } |
| 339 | else if (size == 6) |
| 340 | { |
| 341 | unsigned long temp = 0; |
| 342 | status = (*info->read_memory_func) (memaddr + 2, buffer, 4, info); |
| 343 | if (status != 0) |
| 344 | { |
| 345 | (*info->memory_error_func) (status, memaddr, info); |
| 346 | return; |
| 347 | } |
| 348 | temp |= bfd_getl32 (buffer); |
| 349 | |
| 350 | insn &= 0xffff0000; |
| 351 | insn |= (temp >> 16) & 0xffff; |
| 352 | extension = temp & 0xffff; |
| 353 | } |
| 354 | else if (size == 7 && op->opcode == 0xdd000000) |
| 355 | { |
| 356 | unsigned long temp = 0; |
| 357 | status = (*info->read_memory_func) (memaddr + 1, buffer, 4, info); |
| 358 | if (status != 0) |
| 359 | { |
| 360 | (*info->memory_error_func) (status, memaddr, info); |
| 361 | return; |
| 362 | } |
| 363 | temp |= bfd_getl32 (buffer); |
| 364 | |
| 365 | insn &= 0xff000000; |
| 366 | insn |= (temp >> 8) & 0xffffff; |
| 367 | extension = (temp & 0xff) << 16; |
| 368 | |
| 369 | status = (*info->read_memory_func) (memaddr + 5, buffer, 2, info); |
| 370 | if (status != 0) |
| 371 | { |
| 372 | (*info->memory_error_func) (status, memaddr, info); |
| 373 | return; |
| 374 | } |
| 375 | extension |= bfd_getb16 (buffer); |
| 376 | } |
| 377 | else if (size == 7) |
| 378 | { |
| 379 | unsigned long temp = 0; |
| 380 | status = (*info->read_memory_func) (memaddr + 2, buffer, 4, info); |
| 381 | if (status != 0) |
| 382 | { |
| 383 | (*info->memory_error_func) (status, memaddr, info); |
| 384 | return; |
| 385 | } |
| 386 | temp |= bfd_getl32 (buffer); |
| 387 | |
| 388 | insn &= 0xffff0000; |
| 389 | insn |= (temp >> 16) & 0xffff; |
| 390 | extension = (temp & 0xffff) << 8; |
| 391 | |
| 392 | status = (*info->read_memory_func) (memaddr + 6, buffer, 1, info); |
| 393 | if (status != 0) |
| 394 | { |
| 395 | (*info->memory_error_func) (status, memaddr, info); |
| 396 | return; |
| 397 | } |
| 398 | extension |= *(unsigned char *)buffer; |
| 399 | } |
| 400 | |
| 401 | match = 1; |
| 402 | (*info->fprintf_func) (info->stream, "%s\t", op->name); |
| 403 | |
| 404 | /* Now print the operands. */ |
| 405 | for (opindex_ptr = op->operands, nocomma = 1; |
| 406 | *opindex_ptr != 0; |
| 407 | opindex_ptr++) |
| 408 | { |
| 409 | unsigned long value; |
| 410 | |
| 411 | operand = &mn10300_operands[*opindex_ptr]; |
| 412 | |
| 413 | |
| 414 | if ((operand->flags & MN10300_OPERAND_SPLIT) != 0) |
| 415 | { |
| 416 | unsigned long temp; |
| 417 | value = insn & ((1 << operand->bits) - 1); |
| 418 | value <<= (32 - operand->bits); |
| 419 | temp = extension >> operand->shift; |
| 420 | temp &= ((1 << (32 - operand->bits)) - 1); |
| 421 | value |= temp; |
| 422 | } |
| 423 | else if ((operand->flags & MN10300_OPERAND_EXTENDED) != 0) |
| 424 | { |
| 425 | value = ((extension >> (operand->shift)) |
| 426 | & ((1 << operand->bits) - 1)); |
| 427 | } |
| 428 | else |
| 429 | { |
| 430 | value = ((insn >> (operand->shift)) |
| 431 | & ((1 << operand->bits) - 1)); |
| 432 | } |
| 433 | |
| 434 | if ((operand->flags & MN10300_OPERAND_SIGNED) != 0 |
| 435 | ) |
| 436 | value = ((long)(value << (32 - operand->bits)) |
| 437 | >> (32 - operand->bits)); |
| 438 | |
| 439 | if (!nocomma |
| 440 | && (!paren |
| 441 | || ((operand->flags & MN10300_OPERAND_PAREN) == 0))) |
| 442 | (*info->fprintf_func) (info->stream, ","); |
| 443 | |
| 444 | nocomma = 0; |
| 445 | |
| 446 | if ((operand->flags & MN10300_OPERAND_DREG) != 0) |
| 447 | { |
| 448 | value = ((insn >> (operand->shift + extra_shift)) |
| 449 | & ((1 << operand->bits) - 1)); |
| 450 | (*info->fprintf_func) (info->stream, "d%d", value); |
| 451 | } |
| 452 | |
| 453 | else if ((operand->flags & MN10300_OPERAND_AREG) != 0) |
| 454 | { |
| 455 | value = ((insn >> (operand->shift + extra_shift)) |
| 456 | & ((1 << operand->bits) - 1)); |
| 457 | (*info->fprintf_func) (info->stream, "a%d", value); |
| 458 | } |
| 459 | |
| 460 | else if ((operand->flags & MN10300_OPERAND_SP) != 0) |
| 461 | (*info->fprintf_func) (info->stream, "sp"); |
| 462 | |
| 463 | else if ((operand->flags & MN10300_OPERAND_PSW) != 0) |
| 464 | (*info->fprintf_func) (info->stream, "psw"); |
| 465 | |
| 466 | else if ((operand->flags & MN10300_OPERAND_MDR) != 0) |
| 467 | (*info->fprintf_func) (info->stream, "mdr"); |
| 468 | |
| 469 | |
| 470 | else if ((operand->flags & MN10300_OPERAND_PAREN) != 0) |
| 471 | { |
| 472 | if (paren) |
| 473 | (*info->fprintf_func) (info->stream, ")"); |
| 474 | else |
| 475 | { |
| 476 | (*info->fprintf_func) (info->stream, "("); |
| 477 | nocomma = 1; |
| 478 | } |
| 479 | paren = !paren; |
| 480 | } |
| 481 | |
| 482 | else if ((operand->flags & MN10300_OPERAND_PCREL) != 0) |
| 483 | (*info->print_address_func) ((long) value + memaddr, info); |
| 484 | |
| 485 | else if ((operand->flags & MN10300_OPERAND_MEMADDR) != 0) |
| 486 | (*info->print_address_func) (value, info); |
| 487 | |
| 488 | else if ((operand->flags & MN10300_OPERAND_REG_LIST) != 0) |
| 489 | { |
| 490 | int comma = 0; |
| 491 | |
| 492 | (*info->fprintf_func) (info->stream, "["); |
| 493 | if (value & 0x80) |
| 494 | { |
| 495 | (*info->fprintf_func) (info->stream, "d2"); |
| 496 | comma = 1; |
| 497 | } |
| 498 | |
| 499 | if (value & 0x40) |
| 500 | { |
| 501 | if (comma) |
| 502 | (*info->fprintf_func) (info->stream, ","); |
| 503 | (*info->fprintf_func) (info->stream, "d3"); |
| 504 | comma = 1; |
| 505 | } |
| 506 | |
| 507 | if (value & 0x20) |
| 508 | { |
| 509 | if (comma) |
| 510 | (*info->fprintf_func) (info->stream, ","); |
| 511 | (*info->fprintf_func) (info->stream, "a2"); |
| 512 | comma = 1; |
| 513 | } |
| 514 | |
| 515 | if (value & 0x10) |
| 516 | { |
| 517 | if (comma) |
| 518 | (*info->fprintf_func) (info->stream, ","); |
| 519 | (*info->fprintf_func) (info->stream, "a3"); |
| 520 | comma = 1; |
| 521 | } |
| 522 | |
| 523 | if (value & 0x08) |
| 524 | { |
| 525 | if (comma) |
| 526 | (*info->fprintf_func) (info->stream, ","); |
| 527 | (*info->fprintf_func) (info->stream, "other"); |
| 528 | comma = 1; |
| 529 | } |
| 530 | |
| 531 | (*info->fprintf_func) (info->stream, "]"); |
| 532 | } |
| 533 | |
| 534 | else |
| 535 | (*info->fprintf_func) (info->stream, "%d", value); |
| 536 | } |
| 537 | /* All done. */ |
| 538 | break; |
| 539 | } |
| 540 | op++; |
| 541 | } |
| 542 | |
| 543 | if (!match) |
| 544 | { |
| 545 | /* xgettext:c-format */ |
| 546 | (*info->fprintf_func) (info->stream, _("unknown\t0x%04x"), insn); |
| 547 | } |
| 548 | } |