| 1 | /* m68hc11-dis.c -- Motorola 68HC11 & 68HC12 disassembly |
| 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007 |
| 3 | Free Software Foundation, Inc. |
| 4 | Written by Stephane Carrez (stcarrez@nerim.fr) |
| 5 | |
| 6 | This file is part of the GNU opcodes library. |
| 7 | |
| 8 | This library is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | It is distributed in the hope that it will be useful, but WITHOUT |
| 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 16 | License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | |
| 25 | #include "ansidecl.h" |
| 26 | #include "opcode/m68hc11.h" |
| 27 | #include "dis-asm.h" |
| 28 | |
| 29 | #define PC_REGNUM 3 |
| 30 | |
| 31 | static const char *const reg_name[] = { |
| 32 | "X", "Y", "SP", "PC" |
| 33 | }; |
| 34 | |
| 35 | static const char *const reg_src_table[] = { |
| 36 | "A", "B", "CCR", "TMP3", "D", "X", "Y", "SP" |
| 37 | }; |
| 38 | |
| 39 | static const char *const reg_dst_table[] = { |
| 40 | "A", "B", "CCR", "TMP2", "D", "X", "Y", "SP" |
| 41 | }; |
| 42 | |
| 43 | #define OP_PAGE_MASK (M6811_OP_PAGE2|M6811_OP_PAGE3|M6811_OP_PAGE4) |
| 44 | |
| 45 | /* Prototypes for local functions. */ |
| 46 | static int read_memory (bfd_vma, bfd_byte *, int, struct disassemble_info *); |
| 47 | static int print_indexed_operand (bfd_vma, struct disassemble_info *, |
| 48 | int*, int, int, bfd_vma); |
| 49 | static int print_insn (bfd_vma, struct disassemble_info *, int); |
| 50 | |
| 51 | static int |
| 52 | read_memory (bfd_vma memaddr, bfd_byte* buffer, int size, |
| 53 | struct disassemble_info* info) |
| 54 | { |
| 55 | int status; |
| 56 | |
| 57 | /* Get first byte. Only one at a time because we don't know the |
| 58 | size of the insn. */ |
| 59 | status = (*info->read_memory_func) (memaddr, buffer, size, info); |
| 60 | if (status != 0) |
| 61 | { |
| 62 | (*info->memory_error_func) (status, memaddr, info); |
| 63 | return -1; |
| 64 | } |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | /* Read the 68HC12 indexed operand byte and print the corresponding mode. |
| 70 | Returns the number of bytes read or -1 if failure. */ |
| 71 | static int |
| 72 | print_indexed_operand (bfd_vma memaddr, struct disassemble_info* info, |
| 73 | int* indirect, int mov_insn, int pc_offset, |
| 74 | bfd_vma endaddr) |
| 75 | { |
| 76 | bfd_byte buffer[4]; |
| 77 | int reg; |
| 78 | int status; |
| 79 | short sval; |
| 80 | int pos = 1; |
| 81 | |
| 82 | if (indirect) |
| 83 | *indirect = 0; |
| 84 | |
| 85 | status = read_memory (memaddr, &buffer[0], 1, info); |
| 86 | if (status != 0) |
| 87 | { |
| 88 | return status; |
| 89 | } |
| 90 | |
| 91 | /* n,r with 5-bits signed constant. */ |
| 92 | if ((buffer[0] & 0x20) == 0) |
| 93 | { |
| 94 | reg = (buffer[0] >> 6) & 3; |
| 95 | sval = (buffer[0] & 0x1f); |
| 96 | if (sval & 0x10) |
| 97 | sval |= 0xfff0; |
| 98 | /* 68HC12 requires an adjustment for movb/movw pc relative modes. */ |
| 99 | if (reg == PC_REGNUM && info->mach == bfd_mach_m6812 && mov_insn) |
| 100 | sval += pc_offset; |
| 101 | (*info->fprintf_func) (info->stream, "%d,%s", |
| 102 | (int) sval, reg_name[reg]); |
| 103 | |
| 104 | if (reg == PC_REGNUM) |
| 105 | { |
| 106 | (* info->fprintf_func) (info->stream, " {"); |
| 107 | (* info->print_address_func) (endaddr + sval, info); |
| 108 | (* info->fprintf_func) (info->stream, "}"); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /* Auto pre/post increment/decrement. */ |
| 113 | else if ((buffer[0] & 0xc0) != 0xc0) |
| 114 | { |
| 115 | const char *mode; |
| 116 | |
| 117 | reg = (buffer[0] >> 6) & 3; |
| 118 | sval = (buffer[0] & 0x0f); |
| 119 | if (sval & 0x8) |
| 120 | { |
| 121 | sval |= 0xfff0; |
| 122 | sval = -sval; |
| 123 | mode = "-"; |
| 124 | } |
| 125 | else |
| 126 | { |
| 127 | sval = sval + 1; |
| 128 | mode = "+"; |
| 129 | } |
| 130 | (*info->fprintf_func) (info->stream, "%d,%s%s%s", |
| 131 | (int) sval, |
| 132 | (buffer[0] & 0x10 ? "" : mode), |
| 133 | reg_name[reg], (buffer[0] & 0x10 ? mode : "")); |
| 134 | } |
| 135 | |
| 136 | /* [n,r] 16-bits offset indexed indirect. */ |
| 137 | else if ((buffer[0] & 0x07) == 3) |
| 138 | { |
| 139 | if (mov_insn) |
| 140 | { |
| 141 | (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>", |
| 142 | buffer[0] & 0x0ff); |
| 143 | return 0; |
| 144 | } |
| 145 | reg = (buffer[0] >> 3) & 0x03; |
| 146 | status = read_memory (memaddr + pos, &buffer[0], 2, info); |
| 147 | if (status != 0) |
| 148 | { |
| 149 | return status; |
| 150 | } |
| 151 | |
| 152 | pos += 2; |
| 153 | sval = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); |
| 154 | (*info->fprintf_func) (info->stream, "[%u,%s]", |
| 155 | sval & 0x0ffff, reg_name[reg]); |
| 156 | if (indirect) |
| 157 | *indirect = 1; |
| 158 | } |
| 159 | |
| 160 | /* n,r with 9 and 16 bit signed constant. */ |
| 161 | else if ((buffer[0] & 0x4) == 0) |
| 162 | { |
| 163 | if (mov_insn) |
| 164 | { |
| 165 | (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>", |
| 166 | buffer[0] & 0x0ff); |
| 167 | return 0; |
| 168 | } |
| 169 | reg = (buffer[0] >> 3) & 0x03; |
| 170 | status = read_memory (memaddr + pos, |
| 171 | &buffer[1], (buffer[0] & 0x2 ? 2 : 1), info); |
| 172 | if (status != 0) |
| 173 | { |
| 174 | return status; |
| 175 | } |
| 176 | if (buffer[0] & 2) |
| 177 | { |
| 178 | sval = ((buffer[1] << 8) | (buffer[2] & 0x0FF)); |
| 179 | sval &= 0x0FFFF; |
| 180 | pos += 2; |
| 181 | endaddr += 2; |
| 182 | } |
| 183 | else |
| 184 | { |
| 185 | sval = buffer[1] & 0x00ff; |
| 186 | if (buffer[0] & 0x01) |
| 187 | sval |= 0xff00; |
| 188 | pos++; |
| 189 | endaddr++; |
| 190 | } |
| 191 | (*info->fprintf_func) (info->stream, "%d,%s", |
| 192 | (int) sval, reg_name[reg]); |
| 193 | if (reg == PC_REGNUM) |
| 194 | { |
| 195 | (* info->fprintf_func) (info->stream, " {"); |
| 196 | (* info->print_address_func) (endaddr + sval, info); |
| 197 | (* info->fprintf_func) (info->stream, "}"); |
| 198 | } |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | reg = (buffer[0] >> 3) & 0x03; |
| 203 | switch (buffer[0] & 3) |
| 204 | { |
| 205 | case 0: |
| 206 | (*info->fprintf_func) (info->stream, "A,%s", reg_name[reg]); |
| 207 | break; |
| 208 | case 1: |
| 209 | (*info->fprintf_func) (info->stream, "B,%s", reg_name[reg]); |
| 210 | break; |
| 211 | case 2: |
| 212 | (*info->fprintf_func) (info->stream, "D,%s", reg_name[reg]); |
| 213 | break; |
| 214 | case 3: |
| 215 | default: |
| 216 | (*info->fprintf_func) (info->stream, "[D,%s]", reg_name[reg]); |
| 217 | if (indirect) |
| 218 | *indirect = 1; |
| 219 | break; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | return pos; |
| 224 | } |
| 225 | |
| 226 | /* Disassemble one instruction at address 'memaddr'. Returns the number |
| 227 | of bytes used by that instruction. */ |
| 228 | static int |
| 229 | print_insn (bfd_vma memaddr, struct disassemble_info* info, int arch) |
| 230 | { |
| 231 | int status; |
| 232 | bfd_byte buffer[4]; |
| 233 | unsigned char code; |
| 234 | long format, pos, i; |
| 235 | short sval; |
| 236 | const struct m68hc11_opcode *opcode; |
| 237 | |
| 238 | /* Get first byte. Only one at a time because we don't know the |
| 239 | size of the insn. */ |
| 240 | status = read_memory (memaddr, buffer, 1, info); |
| 241 | if (status != 0) |
| 242 | { |
| 243 | return status; |
| 244 | } |
| 245 | |
| 246 | format = 0; |
| 247 | code = buffer[0]; |
| 248 | pos = 0; |
| 249 | |
| 250 | /* Look for page2,3,4 opcodes. */ |
| 251 | if (code == M6811_OPCODE_PAGE2) |
| 252 | { |
| 253 | pos++; |
| 254 | format = M6811_OP_PAGE2; |
| 255 | } |
| 256 | else if (code == M6811_OPCODE_PAGE3 && arch == cpu6811) |
| 257 | { |
| 258 | pos++; |
| 259 | format = M6811_OP_PAGE3; |
| 260 | } |
| 261 | else if (code == M6811_OPCODE_PAGE4 && arch == cpu6811) |
| 262 | { |
| 263 | pos++; |
| 264 | format = M6811_OP_PAGE4; |
| 265 | } |
| 266 | |
| 267 | /* We are in page2,3,4; get the real opcode. */ |
| 268 | if (pos == 1) |
| 269 | { |
| 270 | status = read_memory (memaddr + pos, &buffer[1], 1, info); |
| 271 | if (status != 0) |
| 272 | { |
| 273 | return status; |
| 274 | } |
| 275 | code = buffer[1]; |
| 276 | } |
| 277 | |
| 278 | |
| 279 | /* Look first for a 68HC12 alias. All of them are 2-bytes long and |
| 280 | in page 1. There is no operand to print. We read the second byte |
| 281 | only when we have a possible match. */ |
| 282 | if ((arch & cpu6812) && format == 0) |
| 283 | { |
| 284 | int must_read = 1; |
| 285 | |
| 286 | /* Walk the alias table to find a code1+code2 match. */ |
| 287 | for (i = 0; i < m68hc12_num_alias; i++) |
| 288 | { |
| 289 | if (m68hc12_alias[i].code1 == code) |
| 290 | { |
| 291 | if (must_read) |
| 292 | { |
| 293 | status = read_memory (memaddr + pos + 1, |
| 294 | &buffer[1], 1, info); |
| 295 | if (status != 0) |
| 296 | break; |
| 297 | |
| 298 | must_read = 1; |
| 299 | } |
| 300 | if (m68hc12_alias[i].code2 == (unsigned char) buffer[1]) |
| 301 | { |
| 302 | (*info->fprintf_func) (info->stream, "%s", |
| 303 | m68hc12_alias[i].name); |
| 304 | return 2; |
| 305 | } |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | pos++; |
| 311 | |
| 312 | /* Scan the opcode table until we find the opcode |
| 313 | with the corresponding page. */ |
| 314 | opcode = m68hc11_opcodes; |
| 315 | for (i = 0; i < m68hc11_num_opcodes; i++, opcode++) |
| 316 | { |
| 317 | int offset; |
| 318 | int pc_src_offset; |
| 319 | int pc_dst_offset = 0; |
| 320 | |
| 321 | if ((opcode->arch & arch) == 0) |
| 322 | continue; |
| 323 | if (opcode->opcode != code) |
| 324 | continue; |
| 325 | if ((opcode->format & OP_PAGE_MASK) != format) |
| 326 | continue; |
| 327 | |
| 328 | if (opcode->format & M6812_OP_REG) |
| 329 | { |
| 330 | int j; |
| 331 | int is_jump; |
| 332 | |
| 333 | if (opcode->format & M6811_OP_JUMP_REL) |
| 334 | is_jump = 1; |
| 335 | else |
| 336 | is_jump = 0; |
| 337 | |
| 338 | status = read_memory (memaddr + pos, &buffer[0], 1, info); |
| 339 | if (status != 0) |
| 340 | { |
| 341 | return status; |
| 342 | } |
| 343 | for (j = 0; i + j < m68hc11_num_opcodes; j++) |
| 344 | { |
| 345 | if ((opcode[j].arch & arch) == 0) |
| 346 | continue; |
| 347 | if (opcode[j].opcode != code) |
| 348 | continue; |
| 349 | if (is_jump) |
| 350 | { |
| 351 | if (!(opcode[j].format & M6811_OP_JUMP_REL)) |
| 352 | continue; |
| 353 | |
| 354 | if ((opcode[j].format & M6812_OP_IBCC_MARKER) |
| 355 | && (buffer[0] & 0xc0) != 0x80) |
| 356 | continue; |
| 357 | if ((opcode[j].format & M6812_OP_TBCC_MARKER) |
| 358 | && (buffer[0] & 0xc0) != 0x40) |
| 359 | continue; |
| 360 | if ((opcode[j].format & M6812_OP_DBCC_MARKER) |
| 361 | && (buffer[0] & 0xc0) != 0) |
| 362 | continue; |
| 363 | if ((opcode[j].format & M6812_OP_EQ_MARKER) |
| 364 | && (buffer[0] & 0x20) == 0) |
| 365 | break; |
| 366 | if (!(opcode[j].format & M6812_OP_EQ_MARKER) |
| 367 | && (buffer[0] & 0x20) != 0) |
| 368 | break; |
| 369 | continue; |
| 370 | } |
| 371 | if (opcode[j].format & M6812_OP_EXG_MARKER && buffer[0] & 0x80) |
| 372 | break; |
| 373 | if ((opcode[j].format & M6812_OP_SEX_MARKER) |
| 374 | && (((buffer[0] & 0x07) >= 3 && (buffer[0] & 7) <= 7)) |
| 375 | && ((buffer[0] & 0x0f0) <= 0x20)) |
| 376 | break; |
| 377 | if (opcode[j].format & M6812_OP_TFR_MARKER |
| 378 | && !(buffer[0] & 0x80)) |
| 379 | break; |
| 380 | } |
| 381 | if (i + j < m68hc11_num_opcodes) |
| 382 | opcode = &opcode[j]; |
| 383 | } |
| 384 | |
| 385 | /* We have found the opcode. Extract the operand and print it. */ |
| 386 | (*info->fprintf_func) (info->stream, "%s", opcode->name); |
| 387 | |
| 388 | format = opcode->format; |
| 389 | if (format & (M6811_OP_MASK | M6811_OP_BITMASK |
| 390 | | M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) |
| 391 | { |
| 392 | (*info->fprintf_func) (info->stream, "\t"); |
| 393 | } |
| 394 | |
| 395 | /* The movb and movw must be handled in a special way... |
| 396 | The source constant 'ii' is not always at the same place. |
| 397 | This is the same for the destination for the post-indexed byte. |
| 398 | The 'offset' is used to do the appropriate correction. |
| 399 | |
| 400 | offset offset |
| 401 | for constant for destination |
| 402 | movb 18 OB ii hh ll 0 0 |
| 403 | 18 08 xb ii 1 -1 |
| 404 | 18 0C hh ll hh ll 0 0 |
| 405 | 18 09 xb hh ll 1 -1 |
| 406 | 18 0D xb hh ll 0 0 |
| 407 | 18 0A xb xb 0 0 |
| 408 | |
| 409 | movw 18 03 jj kk hh ll 0 0 |
| 410 | 18 00 xb jj kk 1 -1 |
| 411 | 18 04 hh ll hh ll 0 0 |
| 412 | 18 01 xb hh ll 1 -1 |
| 413 | 18 05 xb hh ll 0 0 |
| 414 | 18 02 xb xb 0 0 |
| 415 | |
| 416 | After the source operand is read, the position 'pos' is incremented |
| 417 | this explains the negative offset for destination. |
| 418 | |
| 419 | movb/movw above are the only instructions with this matching |
| 420 | format. */ |
| 421 | offset = ((format & M6812_OP_IDX_P2) |
| 422 | && (format & (M6811_OP_IMM8 | M6811_OP_IMM16 | |
| 423 | M6811_OP_IND16))); |
| 424 | |
| 425 | /* Operand with one more byte: - immediate, offset, |
| 426 | direct-low address. */ |
| 427 | if (format & |
| 428 | (M6811_OP_IMM8 | M6811_OP_IX | M6811_OP_IY | M6811_OP_DIRECT)) |
| 429 | { |
| 430 | status = read_memory (memaddr + pos + offset, &buffer[0], 1, info); |
| 431 | if (status != 0) |
| 432 | { |
| 433 | return status; |
| 434 | } |
| 435 | |
| 436 | pos++; |
| 437 | |
| 438 | /* This movb/movw is special (see above). */ |
| 439 | offset = -offset; |
| 440 | |
| 441 | pc_dst_offset = 2; |
| 442 | if (format & M6811_OP_IMM8) |
| 443 | { |
| 444 | (*info->fprintf_func) (info->stream, "#%d", (int) buffer[0]); |
| 445 | format &= ~M6811_OP_IMM8; |
| 446 | /* Set PC destination offset. */ |
| 447 | pc_dst_offset = 1; |
| 448 | } |
| 449 | else if (format & M6811_OP_IX) |
| 450 | { |
| 451 | /* Offsets are in range 0..255, print them unsigned. */ |
| 452 | (*info->fprintf_func) (info->stream, "%u,x", buffer[0] & 0x0FF); |
| 453 | format &= ~M6811_OP_IX; |
| 454 | } |
| 455 | else if (format & M6811_OP_IY) |
| 456 | { |
| 457 | (*info->fprintf_func) (info->stream, "%u,y", buffer[0] & 0x0FF); |
| 458 | format &= ~M6811_OP_IY; |
| 459 | } |
| 460 | else if (format & M6811_OP_DIRECT) |
| 461 | { |
| 462 | (*info->fprintf_func) (info->stream, "*"); |
| 463 | (*info->print_address_func) (buffer[0] & 0x0FF, info); |
| 464 | format &= ~M6811_OP_DIRECT; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | #define M6812_DST_MOVE (M6812_OP_IND16_P2 | M6812_OP_IDX_P2) |
| 469 | #define M6812_INDEXED_FLAGS (M6812_OP_IDX|M6812_OP_IDX_1|M6812_OP_IDX_2) |
| 470 | /* Analyze the 68HC12 indexed byte. */ |
| 471 | if (format & M6812_INDEXED_FLAGS) |
| 472 | { |
| 473 | int indirect; |
| 474 | bfd_vma endaddr; |
| 475 | |
| 476 | endaddr = memaddr + pos + 1; |
| 477 | if (format & M6811_OP_IND16) |
| 478 | endaddr += 2; |
| 479 | pc_src_offset = -1; |
| 480 | pc_dst_offset = 1; |
| 481 | status = print_indexed_operand (memaddr + pos, info, &indirect, |
| 482 | (format & M6812_DST_MOVE), |
| 483 | pc_src_offset, endaddr); |
| 484 | if (status < 0) |
| 485 | { |
| 486 | return status; |
| 487 | } |
| 488 | pos += status; |
| 489 | |
| 490 | /* The indirect addressing mode of the call instruction does |
| 491 | not need the page code. */ |
| 492 | if ((format & M6812_OP_PAGE) && indirect) |
| 493 | format &= ~M6812_OP_PAGE; |
| 494 | } |
| 495 | |
| 496 | /* 68HC12 dbcc/ibcc/tbcc operands. */ |
| 497 | if ((format & M6812_OP_REG) && (format & M6811_OP_JUMP_REL)) |
| 498 | { |
| 499 | status = read_memory (memaddr + pos, &buffer[0], 2, info); |
| 500 | if (status != 0) |
| 501 | { |
| 502 | return status; |
| 503 | } |
| 504 | (*info->fprintf_func) (info->stream, "%s,", |
| 505 | reg_src_table[buffer[0] & 0x07]); |
| 506 | sval = buffer[1] & 0x0ff; |
| 507 | if (buffer[0] & 0x10) |
| 508 | sval |= 0xff00; |
| 509 | |
| 510 | pos += 2; |
| 511 | (*info->print_address_func) (memaddr + pos + sval, info); |
| 512 | format &= ~(M6812_OP_REG | M6811_OP_JUMP_REL); |
| 513 | } |
| 514 | else if (format & (M6812_OP_REG | M6812_OP_REG_2)) |
| 515 | { |
| 516 | status = read_memory (memaddr + pos, &buffer[0], 1, info); |
| 517 | if (status != 0) |
| 518 | { |
| 519 | return status; |
| 520 | } |
| 521 | |
| 522 | pos++; |
| 523 | (*info->fprintf_func) (info->stream, "%s,%s", |
| 524 | reg_src_table[(buffer[0] >> 4) & 7], |
| 525 | reg_dst_table[(buffer[0] & 7)]); |
| 526 | } |
| 527 | |
| 528 | if (format & (M6811_OP_IMM16 | M6811_OP_IND16)) |
| 529 | { |
| 530 | int val; |
| 531 | bfd_vma addr; |
| 532 | unsigned page = 0; |
| 533 | |
| 534 | status = read_memory (memaddr + pos + offset, &buffer[0], 2, info); |
| 535 | if (status != 0) |
| 536 | { |
| 537 | return status; |
| 538 | } |
| 539 | if (format & M6812_OP_IDX_P2) |
| 540 | offset = -2; |
| 541 | else |
| 542 | offset = 0; |
| 543 | pos += 2; |
| 544 | |
| 545 | val = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); |
| 546 | val &= 0x0FFFF; |
| 547 | addr = val; |
| 548 | pc_dst_offset = 2; |
| 549 | if (format & M6812_OP_PAGE) |
| 550 | { |
| 551 | status = read_memory (memaddr + pos + offset, buffer, 1, info); |
| 552 | if (status != 0) |
| 553 | return status; |
| 554 | |
| 555 | page = (unsigned) buffer[0]; |
| 556 | if (addr >= M68HC12_BANK_BASE && addr < 0x0c000) |
| 557 | addr = ((val - M68HC12_BANK_BASE) |
| 558 | | (page << M68HC12_BANK_SHIFT)) |
| 559 | + M68HC12_BANK_VIRT; |
| 560 | } |
| 561 | else if ((arch & cpu6812) |
| 562 | && addr >= M68HC12_BANK_BASE && addr < 0x0c000) |
| 563 | { |
| 564 | int cur_page; |
| 565 | bfd_vma vaddr; |
| 566 | |
| 567 | if (memaddr >= M68HC12_BANK_VIRT) |
| 568 | cur_page = ((memaddr - M68HC12_BANK_VIRT) |
| 569 | >> M68HC12_BANK_SHIFT); |
| 570 | else |
| 571 | cur_page = 0; |
| 572 | |
| 573 | vaddr = ((addr - M68HC12_BANK_BASE) |
| 574 | + (cur_page << M68HC12_BANK_SHIFT)) |
| 575 | + M68HC12_BANK_VIRT; |
| 576 | if (!info->symbol_at_address_func (addr, info) |
| 577 | && info->symbol_at_address_func (vaddr, info)) |
| 578 | addr = vaddr; |
| 579 | } |
| 580 | if (format & M6811_OP_IMM16) |
| 581 | { |
| 582 | format &= ~M6811_OP_IMM16; |
| 583 | (*info->fprintf_func) (info->stream, "#"); |
| 584 | } |
| 585 | else |
| 586 | format &= ~M6811_OP_IND16; |
| 587 | |
| 588 | (*info->print_address_func) (addr, info); |
| 589 | if (format & M6812_OP_PAGE) |
| 590 | { |
| 591 | (* info->fprintf_func) (info->stream, " {"); |
| 592 | (* info->print_address_func) (val, info); |
| 593 | (* info->fprintf_func) (info->stream, ", %d}", page); |
| 594 | format &= ~M6812_OP_PAGE; |
| 595 | pos += 1; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | if (format & M6812_OP_IDX_P2) |
| 600 | { |
| 601 | (*info->fprintf_func) (info->stream, ", "); |
| 602 | status = print_indexed_operand (memaddr + pos + offset, info, |
| 603 | 0, 1, pc_dst_offset, |
| 604 | memaddr + pos + offset + 1); |
| 605 | if (status < 0) |
| 606 | return status; |
| 607 | pos += status; |
| 608 | } |
| 609 | |
| 610 | if (format & M6812_OP_IND16_P2) |
| 611 | { |
| 612 | int val; |
| 613 | |
| 614 | (*info->fprintf_func) (info->stream, ", "); |
| 615 | |
| 616 | status = read_memory (memaddr + pos + offset, &buffer[0], 2, info); |
| 617 | if (status != 0) |
| 618 | { |
| 619 | return status; |
| 620 | } |
| 621 | pos += 2; |
| 622 | |
| 623 | val = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); |
| 624 | val &= 0x0FFFF; |
| 625 | (*info->print_address_func) (val, info); |
| 626 | } |
| 627 | |
| 628 | /* M6811_OP_BITMASK and M6811_OP_JUMP_REL must be treated separately |
| 629 | and in that order. The brset/brclr insn have a bitmask and then |
| 630 | a relative branch offset. */ |
| 631 | if (format & M6811_OP_BITMASK) |
| 632 | { |
| 633 | status = read_memory (memaddr + pos, &buffer[0], 1, info); |
| 634 | if (status != 0) |
| 635 | { |
| 636 | return status; |
| 637 | } |
| 638 | pos++; |
| 639 | (*info->fprintf_func) (info->stream, " #$%02x%s", |
| 640 | buffer[0] & 0x0FF, |
| 641 | (format & M6811_OP_JUMP_REL ? " " : "")); |
| 642 | format &= ~M6811_OP_BITMASK; |
| 643 | } |
| 644 | if (format & M6811_OP_JUMP_REL) |
| 645 | { |
| 646 | int val; |
| 647 | |
| 648 | status = read_memory (memaddr + pos, &buffer[0], 1, info); |
| 649 | if (status != 0) |
| 650 | { |
| 651 | return status; |
| 652 | } |
| 653 | |
| 654 | pos++; |
| 655 | val = (buffer[0] & 0x80) ? buffer[0] | 0xFFFFFF00 : buffer[0]; |
| 656 | (*info->print_address_func) (memaddr + pos + val, info); |
| 657 | format &= ~M6811_OP_JUMP_REL; |
| 658 | } |
| 659 | else if (format & M6812_OP_JUMP_REL16) |
| 660 | { |
| 661 | int val; |
| 662 | |
| 663 | status = read_memory (memaddr + pos, &buffer[0], 2, info); |
| 664 | if (status != 0) |
| 665 | { |
| 666 | return status; |
| 667 | } |
| 668 | |
| 669 | pos += 2; |
| 670 | val = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); |
| 671 | if (val & 0x8000) |
| 672 | val |= 0xffff0000; |
| 673 | |
| 674 | (*info->print_address_func) (memaddr + pos + val, info); |
| 675 | format &= ~M6812_OP_JUMP_REL16; |
| 676 | } |
| 677 | |
| 678 | if (format & M6812_OP_PAGE) |
| 679 | { |
| 680 | int val; |
| 681 | |
| 682 | status = read_memory (memaddr + pos + offset, &buffer[0], 1, info); |
| 683 | if (status != 0) |
| 684 | { |
| 685 | return status; |
| 686 | } |
| 687 | pos += 1; |
| 688 | |
| 689 | val = buffer[0] & 0x0ff; |
| 690 | (*info->fprintf_func) (info->stream, ", %d", val); |
| 691 | } |
| 692 | |
| 693 | #ifdef DEBUG |
| 694 | /* Consistency check. 'format' must be 0, so that we have handled |
| 695 | all formats; and the computed size of the insn must match the |
| 696 | opcode table content. */ |
| 697 | if (format & ~(M6811_OP_PAGE4 | M6811_OP_PAGE3 | M6811_OP_PAGE2)) |
| 698 | { |
| 699 | (*info->fprintf_func) (info->stream, "; Error, format: %lx", format); |
| 700 | } |
| 701 | if (pos != opcode->size) |
| 702 | { |
| 703 | (*info->fprintf_func) (info->stream, "; Error, size: %ld expect %d", |
| 704 | pos, opcode->size); |
| 705 | } |
| 706 | #endif |
| 707 | return pos; |
| 708 | } |
| 709 | |
| 710 | /* Opcode not recognized. */ |
| 711 | if (format == M6811_OP_PAGE2 && arch & cpu6812 |
| 712 | && ((code >= 0x30 && code <= 0x39) || (code >= 0x40))) |
| 713 | (*info->fprintf_func) (info->stream, "trap\t#%d", code & 0x0ff); |
| 714 | |
| 715 | else if (format == M6811_OP_PAGE2) |
| 716 | (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x", |
| 717 | M6811_OPCODE_PAGE2, code); |
| 718 | else if (format == M6811_OP_PAGE3) |
| 719 | (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x", |
| 720 | M6811_OPCODE_PAGE3, code); |
| 721 | else if (format == M6811_OP_PAGE4) |
| 722 | (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x", |
| 723 | M6811_OPCODE_PAGE4, code); |
| 724 | else |
| 725 | (*info->fprintf_func) (info->stream, ".byte\t0x%02x", code); |
| 726 | |
| 727 | return pos; |
| 728 | } |
| 729 | |
| 730 | /* Disassemble one instruction at address 'memaddr'. Returns the number |
| 731 | of bytes used by that instruction. */ |
| 732 | int |
| 733 | print_insn_m68hc11 (bfd_vma memaddr, struct disassemble_info* info) |
| 734 | { |
| 735 | return print_insn (memaddr, info, cpu6811); |
| 736 | } |
| 737 | |
| 738 | int |
| 739 | print_insn_m68hc12 (bfd_vma memaddr, struct disassemble_info* info) |
| 740 | { |
| 741 | return print_insn (memaddr, info, cpu6812); |
| 742 | } |