1 /* m68hc11-dis.c -- Motorola 68HC11 & 68HC12 disassembly 2 Copyright (C) 1999-2016 Free Software Foundation, Inc. 3 Written by Stephane Carrez (stcarrez (at) nerim.fr) 4 XGATE and S12X added by James Murray (jsm (at) jsm-net.demon.co.uk) 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 "sysdep.h" 24 #include <stdio.h> 25 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 { 33 "X", "Y", "SP", "PC" 34 }; 35 36 static const char *const reg_src_table[] = 37 { 38 "A", "B", "CCR", "TMP3", "D", "X", "Y", "SP" 39 }; 40 41 static const char *const reg_dst_table[] = 42 { 43 "A", "B", "CCR", "TMP2", "D", "X", "Y", "SP" 44 }; 45 46 #define OP_PAGE_MASK (M6811_OP_PAGE2|M6811_OP_PAGE3|M6811_OP_PAGE4) 47 48 /* Prototypes for local functions. */ 49 static int read_memory (bfd_vma, bfd_byte *, int, struct disassemble_info *); 50 static int print_indexed_operand (bfd_vma, struct disassemble_info *, 51 int*, int, int, bfd_vma, int); 52 static int print_insn (bfd_vma, struct disassemble_info *, int); 53 54 static int 55 read_memory (bfd_vma memaddr, bfd_byte* buffer, int size, 56 struct disassemble_info* info) 57 { 58 int status; 59 60 /* Get first byte. Only one at a time because we don't know the 61 size of the insn. */ 62 status = (*info->read_memory_func) (memaddr, buffer, size, info); 63 if (status != 0) 64 { 65 (*info->memory_error_func) (status, memaddr, info); 66 return -1; 67 } 68 return 0; 69 } 70 71 72 /* Read the 68HC12 indexed operand byte and print the corresponding mode. 73 Returns the number of bytes read or -1 if failure. */ 74 static int 75 print_indexed_operand (bfd_vma memaddr, struct disassemble_info* info, 76 int* indirect, int mov_insn, int pc_offset, 77 bfd_vma endaddr, int arch) 78 { 79 bfd_byte buffer[4]; 80 int reg; 81 int status; 82 short sval; 83 int pos = 1; 84 85 if (indirect) 86 *indirect = 0; 87 88 status = read_memory (memaddr, &buffer[0], 1, info); 89 if (status != 0) 90 { 91 return status; 92 } 93 94 /* n,r with 5-bits signed constant. */ 95 if ((buffer[0] & 0x20) == 0) 96 { 97 reg = (buffer[0] >> 6) & 3; 98 sval = (buffer[0] & 0x1f); 99 if (sval & 0x10) 100 sval |= 0xfff0; 101 /* 68HC12 requires an adjustment for movb/movw pc relative modes. */ 102 if (reg == PC_REGNUM && info->mach == bfd_mach_m6812 && mov_insn) 103 sval += pc_offset; 104 (*info->fprintf_func) (info->stream, "0x%x,%s", 105 (unsigned short) sval, reg_name[reg]); 106 107 if (reg == PC_REGNUM) 108 { 109 (* info->fprintf_func) (info->stream, " {"); 110 if (info->symtab_size > 0) /* Avoid duplicate 0x from core binutils. */ 111 (*info->fprintf_func) (info->stream, "0x"); 112 (* info->print_address_func) (endaddr + sval, info); 113 (* info->fprintf_func) (info->stream, "}"); 114 } 115 } 116 117 /* Auto pre/post increment/decrement. */ 118 else if ((buffer[0] & 0xc0) != 0xc0) 119 { 120 const char *mode; 121 122 reg = (buffer[0] >> 6) & 3; 123 sval = (buffer[0] & 0x0f); 124 if (sval & 0x8) 125 { 126 sval |= 0xfff0; 127 sval = -sval; 128 mode = "-"; 129 } 130 else 131 { 132 sval = sval + 1; 133 mode = "+"; 134 } 135 (*info->fprintf_func) (info->stream, "%d,%s%s%s", 136 (unsigned short) sval, 137 (buffer[0] & 0x10 ? "" : mode), 138 reg_name[reg], (buffer[0] & 0x10 ? mode : "")); 139 } 140 141 /* [n,r] 16-bits offset indexed indirect. */ 142 else if ((buffer[0] & 0x07) == 3) 143 { 144 if ((mov_insn) && (!(arch & cpu9s12x))) 145 { 146 (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>", 147 buffer[0] & 0x0ff); 148 return 0; 149 } 150 reg = (buffer[0] >> 3) & 0x03; 151 status = read_memory (memaddr + pos, &buffer[0], 2, info); 152 if (status != 0) 153 { 154 return status; 155 } 156 157 pos += 2; 158 sval = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); 159 (*info->fprintf_func) (info->stream, "[0x%x,%s]", 160 sval & 0x0ffff, reg_name[reg]); 161 if (indirect) 162 *indirect = 1; 163 } 164 165 /* n,r with 9 and 16 bit signed constant. */ 166 else if ((buffer[0] & 0x4) == 0) 167 { 168 if ((mov_insn) && (!(arch & cpu9s12x))) 169 { 170 (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>", 171 buffer[0] & 0x0ff); 172 return 0; 173 } 174 175 reg = (buffer[0] >> 3) & 0x03; 176 status = read_memory (memaddr + pos, 177 &buffer[1], (buffer[0] & 0x2 ? 2 : 1), info); 178 if (status != 0) 179 { 180 return status; 181 } 182 if (buffer[0] & 2) 183 { 184 sval = ((buffer[1] << 8) | (buffer[2] & 0x0FF)); 185 sval &= 0x0FFFF; 186 pos += 2; 187 endaddr += 2; 188 } 189 else 190 { 191 sval = buffer[1] & 0x00ff; 192 if (buffer[0] & 0x01) 193 sval |= 0xff00; 194 pos++; 195 endaddr++; 196 } 197 (*info->fprintf_func) (info->stream, "0x%x,%s", 198 (unsigned short) sval, reg_name[reg]); 199 if (reg == PC_REGNUM) 200 { 201 (* info->fprintf_func) (info->stream, " {0x"); 202 (* info->print_address_func) (endaddr + sval, info); 203 (* info->fprintf_func) (info->stream, "}"); 204 } 205 } 206 else 207 { 208 reg = (buffer[0] >> 3) & 0x03; 209 switch (buffer[0] & 3) 210 { 211 case 0: 212 (*info->fprintf_func) (info->stream, "A,%s", reg_name[reg]); 213 break; 214 case 1: 215 (*info->fprintf_func) (info->stream, "B,%s", reg_name[reg]); 216 break; 217 case 2: 218 (*info->fprintf_func) (info->stream, "D,%s", reg_name[reg]); 219 break; 220 case 3: 221 default: 222 (*info->fprintf_func) (info->stream, "[D,%s]", reg_name[reg]); 223 if (indirect) 224 *indirect = 1; 225 break; 226 } 227 } 228 229 return pos; 230 } 231 232 /* Disassemble one instruction at address 'memaddr'. Returns the number 233 of bytes used by that instruction. */ 234 static int 235 print_insn (bfd_vma memaddr, struct disassemble_info* info, int arch) 236 { 237 int status; 238 bfd_byte buffer[4]; 239 unsigned int code; 240 long format, pos, i; 241 short sval; 242 const struct m68hc11_opcode *opcode; 243 244 if (arch & cpuxgate) 245 { 246 int val; 247 /* Get two bytes as all XGATE instructions are 16bit. */ 248 status = read_memory (memaddr, buffer, 2, info); 249 if (status != 0) 250 return status; 251 252 format = 0; 253 code = (buffer[0] << 8) + buffer[1]; 254 255 /* Scan the opcode table until we find the opcode 256 with the corresponding page. */ 257 opcode = m68hc11_opcodes; 258 for (i = 0; i < m68hc11_num_opcodes; i++, opcode++) 259 { 260 if ((opcode->opcode != (code & opcode->xg_mask)) || (opcode->arch != cpuxgate)) 261 continue; 262 /* We have found the opcode. Extract the operand and print it. */ 263 (*info->fprintf_func) (info->stream, "%s", opcode->name); 264 format = opcode->format; 265 if (format & (M68XG_OP_NONE)) 266 { 267 /* Nothing to print. */ 268 } 269 else if (format & M68XG_OP_IMM3) 270 (*info->fprintf_func) (info->stream, " #0x%x", (code >> 8) & 0x7); 271 else if (format & M68XG_OP_R_R) 272 (*info->fprintf_func) (info->stream, " R%x, R%x", 273 (code >> 8) & 0x7, (code >> 5) & 0x7); 274 else if (format & M68XG_OP_R_R_R) 275 (*info->fprintf_func) (info->stream, " R%x, R%x, R%x", 276 (code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7); 277 else if (format & M68XG_OP_RD_RB_RI) 278 (*info->fprintf_func) (info->stream, " R%x, (R%x, R%x)", 279 (code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7); 280 else if (format & M68XG_OP_RD_RB_RIp) 281 (*info->fprintf_func) (info->stream, " R%x, (R%x, R%x+)", 282 (code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7); 283 else if (format & M68XG_OP_RD_RB_mRI) 284 (*info->fprintf_func) (info->stream, " R%x, (R%x, -R%x)", 285 (code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7); 286 else if (format & M68XG_OP_R_R_OFFS5) 287 (*info->fprintf_func) (info->stream, " R%x, (R%x, #0x%x)", 288 (code >> 8) & 0x7, (code >> 5) & 0x7, code & 0x1f); 289 else if (format & M68XG_OP_R_IMM8) 290 (*info->fprintf_func) (info->stream, " R%x, #0x%02x", 291 (code >> 8) & 0x7, code & 0xff); 292 else if (format & M68XG_OP_R_IMM4) 293 (*info->fprintf_func) (info->stream, " R%x, #0x%x", 294 (code >> 8) & 0x7, (code & 0xf0) >> 4); 295 else if (format & M68XG_OP_REL9) 296 { 297 (*info->fprintf_func) (info->stream, " 0x"); 298 val = (buffer[0] & 0x1) ? buffer[1] | 0xFFFFFF00 : buffer[1]; 299 (*info->print_address_func) (memaddr + (val << 1) + 2, info); 300 } 301 else if (format & M68XG_OP_REL10) 302 { 303 (*info->fprintf_func) (info->stream, " 0x"); 304 val = (buffer[0] << 8) | (unsigned int) buffer[1]; 305 if (val & 0x200) 306 val |= 0xfffffc00; 307 else 308 val &= 0x000001ff; 309 (*info->print_address_func) (memaddr + (val << 1) + 2, info); 310 } 311 else if ((code & 0x00ff) == 0x00f8) 312 (*info->fprintf_func) (info->stream, " R%x, CCR", (code >> 8) & 0x7); 313 else if ((code & 0x00ff) == 0x00f9) 314 (*info->fprintf_func) (info->stream, " CCR, R%x", (code >> 8) & 0x7); 315 else if ((code & 0x00ff) == 0x0) 316 (*info->fprintf_func) (info->stream, " R%x, PC", (code >> 8) & 0x7); 317 else if (format & M68XG_OP_R) 318 { 319 /* Special cases for TFR. */ 320 if ((code & 0xf8ff) == 0x00f8) 321 (*info->fprintf_func) (info->stream, " R%x, CCR", (code >> 8) & 0x7); 322 else if ((code & 0xf8ff) == 0x00f9) 323 (*info->fprintf_func) (info->stream, " CCR, R%x", (code >> 8) & 0x7); 324 else if ((code & 0xf8ff) == 0x00fa) 325 (*info->fprintf_func) (info->stream, " R%x, PC", (code >> 8) & 0x7); 326 else 327 (*info->fprintf_func) (info->stream, " R%x", (code >> 8) & 0x7); 328 } 329 else 330 /* Opcode not recognized. */ 331 (*info->fprintf_func) (info->stream, "Not yet handled TEST .byte\t0x%04x", code); 332 return 2; 333 } 334 335 /* Opcode not recognized. */ 336 (*info->fprintf_func) (info->stream, ".byte\t0x%04x", code); 337 return 2; /* Everything is two bytes. */ 338 } 339 340 /* HC11 and HC12. */ 341 342 /* Get first byte. Only one at a time because we don't know the 343 size of the insn. */ 344 status = read_memory (memaddr, buffer, 1, info); 345 if (status != 0) 346 return status; 347 348 format = 0; 349 code = buffer[0]; 350 pos = 0; 351 352 /* Look for page2,3,4 opcodes. */ 353 if (code == M6811_OPCODE_PAGE2) 354 { 355 pos++; 356 format = M6811_OP_PAGE2; 357 } 358 else if (code == M6811_OPCODE_PAGE3 && arch == cpu6811) 359 { 360 pos++; 361 format = M6811_OP_PAGE3; 362 } 363 else if (code == M6811_OPCODE_PAGE4 && arch == cpu6811) 364 { 365 pos++; 366 format = M6811_OP_PAGE4; 367 } 368 369 /* We are in page2,3,4; get the real opcode. */ 370 if (pos == 1) 371 { 372 status = read_memory (memaddr + pos, &buffer[1], 1, info); 373 if (status != 0) 374 return status; 375 376 code = buffer[1]; 377 } 378 379 /* Look first for a 68HC12 alias. All of them are 2-bytes long and 380 in page 1. There is no operand to print. We read the second byte 381 only when we have a possible match. */ 382 if ((arch & cpu6812) && format == 0) 383 { 384 int must_read = 1; 385 386 /* Walk the alias table to find a code1+code2 match. */ 387 for (i = 0; i < m68hc12_num_alias; i++) 388 { 389 if (m68hc12_alias[i].code1 == code) 390 { 391 if (must_read) 392 { 393 status = read_memory (memaddr + pos + 1, 394 &buffer[1], 1, info); 395 if (status != 0) 396 break; 397 398 must_read = 1; 399 } 400 if (m68hc12_alias[i].code2 == (unsigned char) buffer[1]) 401 { 402 (*info->fprintf_func) (info->stream, "%s", 403 m68hc12_alias[i].name); 404 return 2; 405 } 406 } 407 } 408 } 409 410 pos++; 411 412 /* Scan the opcode table until we find the opcode 413 with the corresponding page. */ 414 opcode = m68hc11_opcodes; 415 for (i = 0; i < m68hc11_num_opcodes; i++, opcode++) 416 { 417 int offset; 418 int pc_src_offset; 419 int pc_dst_offset = 0; 420 421 if ((opcode->arch & arch) == 0) 422 continue; 423 if (opcode->opcode != code) 424 continue; 425 if ((opcode->format & OP_PAGE_MASK) != format) 426 continue; 427 428 if (opcode->format & M6812_OP_REG) 429 { 430 int j; 431 int is_jump; 432 433 if (opcode->format & M6811_OP_JUMP_REL) 434 is_jump = 1; 435 else 436 is_jump = 0; 437 438 status = read_memory (memaddr + pos, &buffer[0], 1, info); 439 if (status != 0) 440 { 441 return status; 442 } 443 for (j = 0; i + j < m68hc11_num_opcodes; j++) 444 { 445 if ((opcode[j].arch & arch) == 0) 446 continue; 447 if (opcode[j].opcode != code) 448 continue; 449 if (is_jump) 450 { 451 if (!(opcode[j].format & M6811_OP_JUMP_REL)) 452 continue; 453 454 if ((opcode[j].format & M6812_OP_IBCC_MARKER) 455 && (buffer[0] & 0xc0) != 0x80) 456 continue; 457 if ((opcode[j].format & M6812_OP_TBCC_MARKER) 458 && (buffer[0] & 0xc0) != 0x40) 459 continue; 460 if ((opcode[j].format & M6812_OP_DBCC_MARKER) 461 && (buffer[0] & 0xc0) != 0) 462 continue; 463 if ((opcode[j].format & M6812_OP_EQ_MARKER) 464 && (buffer[0] & 0x20) == 0) 465 break; 466 if (!(opcode[j].format & M6812_OP_EQ_MARKER) 467 && (buffer[0] & 0x20) != 0) 468 break; 469 continue; 470 } 471 if (opcode[j].format & M6812_OP_EXG_MARKER && buffer[0] & 0x80) 472 break; 473 if ((opcode[j].format & M6812_OP_SEX_MARKER) 474 && (((buffer[0] & 0x07) >= 3 && (buffer[0] & 7) <= 7)) 475 && ((buffer[0] & 0x0f0) <= 0x20)) 476 break; 477 if ((opcode[j].format & M6812_OP_SEX_MARKER) 478 && (arch & cpu9s12x) 479 && ((buffer[0] == 0x4d) || (buffer[0] == 0x4e))) 480 break; 481 if (opcode[j].format & M6812_OP_TFR_MARKER 482 && !(buffer[0] & 0x80)) 483 break; 484 } 485 if (i + j < m68hc11_num_opcodes) 486 opcode = &opcode[j]; 487 } 488 489 /* We have found the opcode. Extract the operand and print it. */ 490 (*info->fprintf_func) (info->stream, "%s", opcode->name); 491 492 format = opcode->format; 493 if (format & (M6811_OP_MASK | M6811_OP_BITMASK 494 | M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) 495 { 496 (*info->fprintf_func) (info->stream, "\t"); 497 } 498 499 /* The movb and movw must be handled in a special way... 500 The source constant 'ii' is not always at the same place. 501 This is the same for the destination for the post-indexed byte. 502 The 'offset' is used to do the appropriate correction. 503 504 offset offset 505 for constant for destination 506 movb 18 OB ii hh ll 0 0 507 18 08 xb ii 1 -1 508 18 08 xb ff ii 2 1 9 bit 509 18 08 xb ee ff ii 3 1 16 bit 510 18 0C hh ll hh ll 0 0 511 18 09 xb hh ll 1 -1 512 18 0D xb hh ll 0 0 513 18 0A xb xb 0 0 514 515 movw 18 03 jj kk hh ll 0 0 516 18 00 xb jj kk 1 -1 517 18 04 hh ll hh ll 0 0 518 18 01 xb hh ll 1 -1 519 18 05 xb hh ll 0 0 520 18 02 xb xb 0 0 521 522 After the source operand is read, the position 'pos' is incremented 523 this explains the negative offset for destination. 524 525 movb/movw above are the only instructions with this matching 526 format. */ 527 offset = ((format & M6812_OP_IDX_P2) 528 && (format & (M6811_OP_IMM8 | M6811_OP_IMM16 | 529 M6811_OP_IND16))); 530 531 if (offset) 532 { 533 /* Check xb to see position of data. */ 534 status = read_memory (memaddr + pos, &buffer[0], 1, info); 535 if (status != 0) 536 { 537 return status; 538 } 539 540 if (((buffer[0] & 0xe0) == 0xe0) && ((buffer[0] & 0x04) == 0)) 541 { 542 /* 9 or 16 bit. */ 543 if ((buffer[0] & 0x02) == 0) 544 { 545 /* 9 bit. */ 546 offset = 2; 547 } 548 else 549 { 550 /* 16 bit. */ 551 offset = 3; 552 } 553 } 554 } 555 556 /* Operand with one more byte: - immediate, offset, 557 direct-low address. */ 558 if (format & 559 (M6811_OP_IMM8 | M6811_OP_IX | M6811_OP_IY | M6811_OP_DIRECT)) 560 { 561 status = read_memory (memaddr + pos + offset, &buffer[0], 1, info); 562 if (status != 0) 563 return status; 564 565 /* This movb/movw is special (see above). */ 566 if (offset < 2) 567 { 568 offset = -offset; 569 pc_dst_offset = 2; 570 } 571 else 572 { 573 offset = -1; 574 pc_dst_offset = 5; 575 } 576 pos++; 577 578 if (format & M6811_OP_IMM8) 579 { 580 (*info->fprintf_func) (info->stream, "#0x%x", (int) buffer[0]); 581 format &= ~M6811_OP_IMM8; 582 /* Set PC destination offset. */ 583 pc_dst_offset = 1; 584 } 585 else if (format & M6811_OP_IX) 586 { 587 /* Offsets are in range 0..255, print them unsigned. */ 588 (*info->fprintf_func) (info->stream, "0x%x,x", buffer[0] & 0x0FF); 589 format &= ~M6811_OP_IX; 590 } 591 else if (format & M6811_OP_IY) 592 { 593 (*info->fprintf_func) (info->stream, "0x%x,y", buffer[0] & 0x0FF); 594 format &= ~M6811_OP_IY; 595 } 596 else if (format & M6811_OP_DIRECT) 597 { 598 (*info->fprintf_func) (info->stream, "*"); 599 if (info->symtab_size > 0) /* Avoid duplicate 0x. */ 600 (*info->fprintf_func) (info->stream, "0x"); 601 (*info->print_address_func) (buffer[0] & 0x0FF, info); 602 format &= ~M6811_OP_DIRECT; 603 } 604 } 605 606 #define M6812_DST_MOVE (M6812_OP_IND16_P2 | M6812_OP_IDX_P2) 607 #define M6812_INDEXED_FLAGS (M6812_OP_IDX|M6812_OP_IDX_1|M6812_OP_IDX_2) 608 /* Analyze the 68HC12 indexed byte. */ 609 if (format & M6812_INDEXED_FLAGS) 610 { 611 int indirect; 612 bfd_vma endaddr; 613 614 endaddr = memaddr + pos + 1; 615 if (format & M6811_OP_IND16) 616 endaddr += 2; 617 pc_src_offset = -1; 618 pc_dst_offset = 1; 619 status = print_indexed_operand (memaddr + pos, info, &indirect, 620 (format & M6812_DST_MOVE), 621 pc_src_offset, endaddr, arch); 622 if (status < 0) 623 return status; 624 625 pos += status; 626 627 /* The indirect addressing mode of the call instruction does 628 not need the page code. */ 629 if ((format & M6812_OP_PAGE) && indirect) 630 format &= ~M6812_OP_PAGE; 631 } 632 633 /* 68HC12 dbcc/ibcc/tbcc operands. */ 634 if ((format & M6812_OP_REG) && (format & M6811_OP_JUMP_REL)) 635 { 636 status = read_memory (memaddr + pos, &buffer[0], 2, info); 637 if (status != 0) 638 return status; 639 640 (*info->fprintf_func) (info->stream, "%s,", 641 reg_src_table[buffer[0] & 0x07]); 642 sval = buffer[1] & 0x0ff; 643 if (buffer[0] & 0x10) 644 sval |= 0xff00; 645 646 pos += 2; 647 (*info->fprintf_func) (info->stream, "0x"); 648 (*info->print_address_func) (memaddr + pos + sval, info); 649 format &= ~(M6812_OP_REG | M6811_OP_JUMP_REL); 650 } 651 else if (format & (M6812_OP_REG | M6812_OP_REG_2)) 652 { 653 status = read_memory (memaddr + pos, &buffer[0], 1, info); 654 if (status != 0) 655 return status; 656 657 pos++; 658 (*info->fprintf_func) (info->stream, "%s,%s", 659 reg_src_table[(buffer[0] >> 4) & 7], 660 reg_dst_table[(buffer[0] & 7)]); 661 } 662 663 if (format & (M6811_OP_IMM16 | M6811_OP_IND16)) 664 { 665 int val; 666 bfd_vma addr; 667 unsigned page = 0; 668 669 status = read_memory (memaddr + pos + offset, &buffer[0], 2, info); 670 if (status != 0) 671 return status; 672 673 if (format & M6812_OP_IDX_P2) 674 offset = -2; 675 else 676 offset = 0; 677 pos += 2; 678 679 val = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); 680 val &= 0x0FFFF; 681 addr = val; 682 pc_dst_offset = 2; 683 if (format & M6812_OP_PAGE) 684 { 685 status = read_memory (memaddr + pos + offset, buffer, 1, info); 686 if (status != 0) 687 return status; 688 689 page = (unsigned) buffer[0]; 690 if (addr >= M68HC12_BANK_BASE && addr < 0x0c000) 691 addr = ((val - M68HC12_BANK_BASE) 692 | (page << M68HC12_BANK_SHIFT)) 693 + M68HC12_BANK_VIRT; 694 } 695 else if ((arch & cpu6812) 696 && addr >= M68HC12_BANK_BASE && addr < 0x0c000) 697 { 698 int cur_page; 699 bfd_vma vaddr; 700 701 if (memaddr >= M68HC12_BANK_VIRT) 702 cur_page = ((memaddr - M68HC12_BANK_VIRT) 703 >> M68HC12_BANK_SHIFT); 704 else 705 cur_page = 0; 706 707 vaddr = ((addr - M68HC12_BANK_BASE) 708 + (cur_page << M68HC12_BANK_SHIFT)) 709 + M68HC12_BANK_VIRT; 710 if (!info->symbol_at_address_func (addr, info) 711 && info->symbol_at_address_func (vaddr, info)) 712 addr = vaddr; 713 } 714 if (format & M6811_OP_IMM16) 715 { 716 format &= ~M6811_OP_IMM16; 717 (*info->fprintf_func) (info->stream, "#"); 718 } 719 else 720 { 721 format &= ~M6811_OP_IND16; 722 } 723 724 if (info->symtab_size > 0) /* Avoid duplicate 0x from core binutils. */ 725 (*info->fprintf_func) (info->stream, "0x"); 726 727 (*info->print_address_func) (addr, info); 728 if (format & M6812_OP_PAGE) 729 { 730 (* info->fprintf_func) (info->stream, " {"); 731 if (info->symtab_size > 0) /* Avoid duplicate 0x from core binutils. */ 732 (*info->fprintf_func) (info->stream, "0x"); 733 (* info->print_address_func) (val, info); 734 (* info->fprintf_func) (info->stream, ", 0x%x}", page); 735 format &= ~M6812_OP_PAGE; 736 pos += 1; 737 } 738 } 739 740 if (format & M6812_OP_IDX_P2) 741 { 742 (*info->fprintf_func) (info->stream, ", "); 743 status = print_indexed_operand (memaddr + pos + offset, info, 744 0, 1, pc_dst_offset, 745 memaddr + pos + offset + 1, arch); 746 if (status < 0) 747 return status; 748 pos += status; 749 } 750 751 if (format & M6812_OP_IND16_P2) 752 { 753 int val; 754 755 (*info->fprintf_func) (info->stream, ", "); 756 757 status = read_memory (memaddr + pos + offset, &buffer[0], 2, info); 758 if (status != 0) 759 return status; 760 761 pos += 2; 762 763 val = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); 764 val &= 0x0FFFF; 765 if (info->symtab_size > 0) /* Avoid duplicate 0x from core binutils. */ 766 (*info->fprintf_func) (info->stream, "0x"); 767 (*info->print_address_func) (val, info); 768 } 769 770 /* M6811_OP_BITMASK and M6811_OP_JUMP_REL must be treated separately 771 and in that order. The brset/brclr insn have a bitmask and then 772 a relative branch offset. */ 773 if (format & M6811_OP_BITMASK) 774 { 775 status = read_memory (memaddr + pos, &buffer[0], 1, info); 776 if (status != 0) 777 return status; 778 779 pos++; 780 (*info->fprintf_func) (info->stream, ", #0x%02x%s", 781 buffer[0] & 0x0FF, 782 (format & M6811_OP_JUMP_REL ? ", " : "")); 783 format &= ~M6811_OP_BITMASK; 784 } 785 if (format & M6811_OP_JUMP_REL) 786 { 787 int val; 788 789 status = read_memory (memaddr + pos, &buffer[0], 1, info); 790 if (status != 0) 791 return status; 792 793 (*info->fprintf_func) (info->stream, "0x"); 794 pos++; 795 val = (buffer[0] & 0x80) ? buffer[0] | 0xFFFFFF00 : buffer[0]; 796 (*info->print_address_func) (memaddr + pos + val, info); 797 format &= ~M6811_OP_JUMP_REL; 798 } 799 else if (format & M6812_OP_JUMP_REL16) 800 { 801 int val; 802 803 status = read_memory (memaddr + pos, &buffer[0], 2, info); 804 if (status != 0) 805 return status; 806 807 pos += 2; 808 val = ((buffer[0] << 8) | (buffer[1] & 0x0FF)); 809 if (val & 0x8000) 810 val |= 0xffff0000; 811 812 (*info->fprintf_func) (info->stream, "0x"); 813 (*info->print_address_func) (memaddr + pos + val, info); 814 format &= ~M6812_OP_JUMP_REL16; 815 } 816 817 if (format & M6812_OP_PAGE) 818 { 819 int val; 820 821 status = read_memory (memaddr + pos + offset, &buffer[0], 1, info); 822 if (status != 0) 823 return status; 824 825 pos += 1; 826 827 val = buffer[0] & 0x0ff; 828 (*info->fprintf_func) (info->stream, ", 0x%x", val); 829 } 830 831 #ifdef DEBUG 832 /* Consistency check. 'format' must be 0, so that we have handled 833 all formats; and the computed size of the insn must match the 834 opcode table content. */ 835 if (format & ~(M6811_OP_PAGE4 | M6811_OP_PAGE3 | M6811_OP_PAGE2)) 836 (*info->fprintf_func) (info->stream, "; Error, format: %lx", format); 837 838 if (pos != opcode->size) 839 (*info->fprintf_func) (info->stream, "; Error, size: %ld expect %d", 840 pos, opcode->size); 841 #endif 842 return pos; 843 } 844 845 /* Opcode not recognized. */ 846 if (format == M6811_OP_PAGE2 && arch & cpu6812 847 && ((code >= 0x30 && code <= 0x39) || (code >= 0x40))) 848 (*info->fprintf_func) (info->stream, "trap\t#0x%02x", code & 0x0ff); 849 850 else if (format == M6811_OP_PAGE2) 851 (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x", 852 M6811_OPCODE_PAGE2, code); 853 else if (format == M6811_OP_PAGE3) 854 (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x", 855 M6811_OPCODE_PAGE3, code); 856 else if (format == M6811_OP_PAGE4) 857 (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x", 858 M6811_OPCODE_PAGE4, code); 859 else 860 (*info->fprintf_func) (info->stream, ".byte\t0x%02x", code); 861 862 return pos; 863 } 864 865 /* Disassemble one instruction at address 'memaddr'. Returns the number 866 of bytes used by that instruction. */ 867 int 868 print_insn_m68hc11 (bfd_vma memaddr, struct disassemble_info* info) 869 { 870 return print_insn (memaddr, info, cpu6811); 871 } 872 873 int 874 print_insn_m68hc12 (bfd_vma memaddr, struct disassemble_info* info) 875 { 876 return print_insn (memaddr, info, cpu6812); 877 } 878 879 int 880 print_insn_m9s12x (bfd_vma memaddr, struct disassemble_info* info) 881 { 882 return print_insn (memaddr, info, cpu6812|cpu9s12x); 883 } 884 885 int 886 print_insn_m9s12xg (bfd_vma memaddr, struct disassemble_info* info) 887 { 888 return print_insn (memaddr, info, cpuxgate); 889 } 890
