| 1 | /* Print National Semiconductor 32000 instructions. |
| 2 | Copyright 1986, 1988, 1991, 1992, 1994, 1998, 2001, 2002, 2005 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of opcodes library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "dis-asm.h" |
| 26 | #if !defined(const) && !defined(__STDC__) |
| 27 | #define const |
| 28 | #endif |
| 29 | #include "opcode/ns32k.h" |
| 30 | #include "opintl.h" |
| 31 | |
| 32 | static disassemble_info *dis_info; |
| 33 | |
| 34 | /* Hacks to get it to compile <= READ THESE AS FIXES NEEDED. */ |
| 35 | #define INVALID_FLOAT(val, size) invalid_float ((bfd_byte *) val, size) |
| 36 | |
| 37 | static long |
| 38 | read_memory_integer (unsigned char * addr, int nr) |
| 39 | { |
| 40 | long val; |
| 41 | int i; |
| 42 | |
| 43 | for (val = 0, i = nr - 1; i >= 0; i--) |
| 44 | { |
| 45 | val = (val << 8); |
| 46 | val |= (0xff & *(addr + i)); |
| 47 | } |
| 48 | return val; |
| 49 | } |
| 50 | |
| 51 | /* 32000 instructions are never longer than this. */ |
| 52 | #define MAXLEN 62 |
| 53 | |
| 54 | #include <setjmp.h> |
| 55 | |
| 56 | struct private |
| 57 | { |
| 58 | /* Points to first byte not fetched. */ |
| 59 | bfd_byte *max_fetched; |
| 60 | bfd_byte the_buffer[MAXLEN]; |
| 61 | bfd_vma insn_start; |
| 62 | jmp_buf bailout; |
| 63 | }; |
| 64 | |
| 65 | |
| 66 | /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) |
| 67 | to ADDR (exclusive) are valid. Returns 1 for success, longjmps |
| 68 | on error. */ |
| 69 | #define FETCH_DATA(info, addr) \ |
| 70 | ((addr) <= ((struct private *)(info->private_data))->max_fetched \ |
| 71 | ? 1 : fetch_data ((info), (addr))) |
| 72 | |
| 73 | static int |
| 74 | fetch_data (struct disassemble_info *info, bfd_byte *addr) |
| 75 | { |
| 76 | int status; |
| 77 | struct private *priv = (struct private *) info->private_data; |
| 78 | bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer); |
| 79 | |
| 80 | status = (*info->read_memory_func) (start, |
| 81 | priv->max_fetched, |
| 82 | addr - priv->max_fetched, |
| 83 | info); |
| 84 | if (status != 0) |
| 85 | { |
| 86 | (*info->memory_error_func) (status, start, info); |
| 87 | longjmp (priv->bailout, 1); |
| 88 | } |
| 89 | else |
| 90 | priv->max_fetched = addr; |
| 91 | return 1; |
| 92 | } |
| 93 | |
| 94 | /* Number of elements in the opcode table. */ |
| 95 | #define NOPCODES (sizeof ns32k_opcodes / sizeof ns32k_opcodes[0]) |
| 96 | |
| 97 | #define NEXT_IS_ADDR '|' |
| 98 | |
| 99 | \f |
| 100 | struct ns32k_option |
| 101 | { |
| 102 | char *pattern; /* The option itself. */ |
| 103 | unsigned long value; /* Binary value of the option. */ |
| 104 | unsigned long match; /* These bits must match. */ |
| 105 | }; |
| 106 | |
| 107 | \f |
| 108 | static const struct ns32k_option opt_u[]= /* Restore, exit. */ |
| 109 | { |
| 110 | { "r0", 0x80, 0x80 }, |
| 111 | { "r1", 0x40, 0x40 }, |
| 112 | { "r2", 0x20, 0x20 }, |
| 113 | { "r3", 0x10, 0x10 }, |
| 114 | { "r4", 0x08, 0x08 }, |
| 115 | { "r5", 0x04, 0x04 }, |
| 116 | { "r6", 0x02, 0x02 }, |
| 117 | { "r7", 0x01, 0x01 }, |
| 118 | { 0 , 0x00, 0x00 } |
| 119 | }; |
| 120 | |
| 121 | static const struct ns32k_option opt_U[]= /* Save, enter. */ |
| 122 | { |
| 123 | { "r0", 0x01, 0x01 }, |
| 124 | { "r1", 0x02, 0x02 }, |
| 125 | { "r2", 0x04, 0x04 }, |
| 126 | { "r3", 0x08, 0x08 }, |
| 127 | { "r4", 0x10, 0x10 }, |
| 128 | { "r5", 0x20, 0x20 }, |
| 129 | { "r6", 0x40, 0x40 }, |
| 130 | { "r7", 0x80, 0x80 }, |
| 131 | { 0 , 0x00, 0x00 } |
| 132 | }; |
| 133 | |
| 134 | static const struct ns32k_option opt_O[]= /* Setcfg. */ |
| 135 | { |
| 136 | { "c", 0x8, 0x8 }, |
| 137 | { "m", 0x4, 0x4 }, |
| 138 | { "f", 0x2, 0x2 }, |
| 139 | { "i", 0x1, 0x1 }, |
| 140 | { 0 , 0x0, 0x0 } |
| 141 | }; |
| 142 | |
| 143 | static const struct ns32k_option opt_C[]= /* Cinv. */ |
| 144 | { |
| 145 | { "a", 0x4, 0x4 }, |
| 146 | { "i", 0x2, 0x2 }, |
| 147 | { "d", 0x1, 0x1 }, |
| 148 | { 0 , 0x0, 0x0 } |
| 149 | }; |
| 150 | |
| 151 | static const struct ns32k_option opt_S[]= /* String inst. */ |
| 152 | { |
| 153 | { "b", 0x1, 0x1 }, |
| 154 | { "u", 0x6, 0x6 }, |
| 155 | { "w", 0x2, 0x2 }, |
| 156 | { 0 , 0x0, 0x0 } |
| 157 | }; |
| 158 | |
| 159 | static const struct ns32k_option list_P532[]= /* Lpr spr. */ |
| 160 | { |
| 161 | { "us", 0x0, 0xf }, |
| 162 | { "dcr", 0x1, 0xf }, |
| 163 | { "bpc", 0x2, 0xf }, |
| 164 | { "dsr", 0x3, 0xf }, |
| 165 | { "car", 0x4, 0xf }, |
| 166 | { "fp", 0x8, 0xf }, |
| 167 | { "sp", 0x9, 0xf }, |
| 168 | { "sb", 0xa, 0xf }, |
| 169 | { "usp", 0xb, 0xf }, |
| 170 | { "cfg", 0xc, 0xf }, |
| 171 | { "psr", 0xd, 0xf }, |
| 172 | { "intbase", 0xe, 0xf }, |
| 173 | { "mod", 0xf, 0xf }, |
| 174 | { 0 , 0x00, 0xf } |
| 175 | }; |
| 176 | |
| 177 | static const struct ns32k_option list_M532[]= /* Lmr smr. */ |
| 178 | { |
| 179 | { "mcr", 0x9, 0xf }, |
| 180 | { "msr", 0xa, 0xf }, |
| 181 | { "tear", 0xb, 0xf }, |
| 182 | { "ptb0", 0xc, 0xf }, |
| 183 | { "ptb1", 0xd, 0xf }, |
| 184 | { "ivar0", 0xe, 0xf }, |
| 185 | { "ivar1", 0xf, 0xf }, |
| 186 | { 0 , 0x0, 0xf } |
| 187 | }; |
| 188 | |
| 189 | static const struct ns32k_option list_P032[]= /* Lpr spr. */ |
| 190 | { |
| 191 | { "upsr", 0x0, 0xf }, |
| 192 | { "fp", 0x8, 0xf }, |
| 193 | { "sp", 0x9, 0xf }, |
| 194 | { "sb", 0xa, 0xf }, |
| 195 | { "psr", 0xb, 0xf }, |
| 196 | { "intbase", 0xe, 0xf }, |
| 197 | { "mod", 0xf, 0xf }, |
| 198 | { 0 , 0x0, 0xf } |
| 199 | }; |
| 200 | |
| 201 | static const struct ns32k_option list_M032[]= /* Lmr smr. */ |
| 202 | { |
| 203 | { "bpr0", 0x0, 0xf }, |
| 204 | { "bpr1", 0x1, 0xf }, |
| 205 | { "pf0", 0x4, 0xf }, |
| 206 | { "pf1", 0x5, 0xf }, |
| 207 | { "sc", 0x8, 0xf }, |
| 208 | { "msr", 0xa, 0xf }, |
| 209 | { "bcnt", 0xb, 0xf }, |
| 210 | { "ptb0", 0xc, 0xf }, |
| 211 | { "ptb1", 0xd, 0xf }, |
| 212 | { "eia", 0xf, 0xf }, |
| 213 | { 0 , 0x0, 0xf } |
| 214 | }; |
| 215 | |
| 216 | |
| 217 | /* Figure out which options are present. */ |
| 218 | |
| 219 | static void |
| 220 | optlist (int options, const struct ns32k_option * optionP, char * result) |
| 221 | { |
| 222 | if (options == 0) |
| 223 | { |
| 224 | sprintf (result, "[]"); |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | sprintf (result, "["); |
| 229 | |
| 230 | for (; (options != 0) && optionP->pattern; optionP++) |
| 231 | { |
| 232 | if ((options & optionP->match) == optionP->value) |
| 233 | { |
| 234 | /* We found a match, update result and options. */ |
| 235 | strcat (result, optionP->pattern); |
| 236 | options &= ~optionP->value; |
| 237 | if (options != 0) /* More options to come. */ |
| 238 | strcat (result, ","); |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | if (options != 0) |
| 243 | strcat (result, "undefined"); |
| 244 | |
| 245 | strcat (result, "]"); |
| 246 | } |
| 247 | |
| 248 | static void |
| 249 | list_search (int reg_value, const struct ns32k_option *optionP, char *result) |
| 250 | { |
| 251 | for (; optionP->pattern; optionP++) |
| 252 | { |
| 253 | if ((reg_value & optionP->match) == optionP->value) |
| 254 | { |
| 255 | sprintf (result, "%s", optionP->pattern); |
| 256 | return; |
| 257 | } |
| 258 | } |
| 259 | sprintf (result, "undefined"); |
| 260 | } |
| 261 | \f |
| 262 | /* Extract "count" bits starting "offset" bits into buffer. */ |
| 263 | |
| 264 | static int |
| 265 | bit_extract (bfd_byte *buffer, int offset, int count) |
| 266 | { |
| 267 | int result; |
| 268 | int bit; |
| 269 | |
| 270 | buffer += offset >> 3; |
| 271 | offset &= 7; |
| 272 | bit = 1; |
| 273 | result = 0; |
| 274 | while (count--) |
| 275 | { |
| 276 | FETCH_DATA (dis_info, buffer + 1); |
| 277 | if ((*buffer & (1 << offset))) |
| 278 | result |= bit; |
| 279 | if (++offset == 8) |
| 280 | { |
| 281 | offset = 0; |
| 282 | buffer++; |
| 283 | } |
| 284 | bit <<= 1; |
| 285 | } |
| 286 | return result; |
| 287 | } |
| 288 | |
| 289 | /* Like bit extract but the buffer is valid and doen't need to be fetched. */ |
| 290 | |
| 291 | static int |
| 292 | bit_extract_simple (bfd_byte *buffer, int offset, int count) |
| 293 | { |
| 294 | int result; |
| 295 | int bit; |
| 296 | |
| 297 | buffer += offset >> 3; |
| 298 | offset &= 7; |
| 299 | bit = 1; |
| 300 | result = 0; |
| 301 | while (count--) |
| 302 | { |
| 303 | if ((*buffer & (1 << offset))) |
| 304 | result |= bit; |
| 305 | if (++offset == 8) |
| 306 | { |
| 307 | offset = 0; |
| 308 | buffer++; |
| 309 | } |
| 310 | bit <<= 1; |
| 311 | } |
| 312 | return result; |
| 313 | } |
| 314 | |
| 315 | static void |
| 316 | bit_copy (bfd_byte *buffer, int offset, int count, char *to) |
| 317 | { |
| 318 | for (; count > 8; count -= 8, to++, offset += 8) |
| 319 | *to = bit_extract (buffer, offset, 8); |
| 320 | *to = bit_extract (buffer, offset, count); |
| 321 | } |
| 322 | |
| 323 | static int |
| 324 | sign_extend (int value, int bits) |
| 325 | { |
| 326 | value = value & ((1 << bits) - 1); |
| 327 | return (value & (1 << (bits - 1)) |
| 328 | ? value | (~((1 << bits) - 1)) |
| 329 | : value); |
| 330 | } |
| 331 | |
| 332 | static void |
| 333 | flip_bytes (char *ptr, int count) |
| 334 | { |
| 335 | char tmp; |
| 336 | |
| 337 | while (count > 0) |
| 338 | { |
| 339 | tmp = ptr[0]; |
| 340 | ptr[0] = ptr[count - 1]; |
| 341 | ptr[count - 1] = tmp; |
| 342 | ptr++; |
| 343 | count -= 2; |
| 344 | } |
| 345 | } |
| 346 | \f |
| 347 | /* Given a character C, does it represent a general addressing mode? */ |
| 348 | #define Is_gen(c) \ |
| 349 | ((c) == 'F' || (c) == 'L' || (c) == 'B' \ |
| 350 | || (c) == 'W' || (c) == 'D' || (c) == 'A' || (c) == 'I' || (c) == 'Z') |
| 351 | |
| 352 | /* Adressing modes. */ |
| 353 | #define Adrmod_index_byte 0x1c |
| 354 | #define Adrmod_index_word 0x1d |
| 355 | #define Adrmod_index_doubleword 0x1e |
| 356 | #define Adrmod_index_quadword 0x1f |
| 357 | |
| 358 | /* Is MODE an indexed addressing mode? */ |
| 359 | #define Adrmod_is_index(mode) \ |
| 360 | ( mode == Adrmod_index_byte \ |
| 361 | || mode == Adrmod_index_word \ |
| 362 | || mode == Adrmod_index_doubleword \ |
| 363 | || mode == Adrmod_index_quadword) |
| 364 | |
| 365 | \f |
| 366 | static int |
| 367 | get_displacement (bfd_byte *buffer, int *aoffsetp) |
| 368 | { |
| 369 | int Ivalue; |
| 370 | short Ivalue2; |
| 371 | |
| 372 | Ivalue = bit_extract (buffer, *aoffsetp, 8); |
| 373 | switch (Ivalue & 0xc0) |
| 374 | { |
| 375 | case 0x00: |
| 376 | case 0x40: |
| 377 | Ivalue = sign_extend (Ivalue, 7); |
| 378 | *aoffsetp += 8; |
| 379 | break; |
| 380 | case 0x80: |
| 381 | Ivalue2 = bit_extract (buffer, *aoffsetp, 16); |
| 382 | flip_bytes ((char *) & Ivalue2, 2); |
| 383 | Ivalue = sign_extend (Ivalue2, 14); |
| 384 | *aoffsetp += 16; |
| 385 | break; |
| 386 | case 0xc0: |
| 387 | Ivalue = bit_extract (buffer, *aoffsetp, 32); |
| 388 | flip_bytes ((char *) & Ivalue, 4); |
| 389 | Ivalue = sign_extend (Ivalue, 30); |
| 390 | *aoffsetp += 32; |
| 391 | break; |
| 392 | } |
| 393 | return Ivalue; |
| 394 | } |
| 395 | |
| 396 | #if 1 /* A version that should work on ns32k f's&d's on any machine. */ |
| 397 | static int |
| 398 | invalid_float (bfd_byte *p, int len) |
| 399 | { |
| 400 | int val; |
| 401 | |
| 402 | if (len == 4) |
| 403 | val = (bit_extract_simple (p, 23, 8)/*exponent*/ == 0xff |
| 404 | || (bit_extract_simple (p, 23, 8)/*exponent*/ == 0 |
| 405 | && bit_extract_simple (p, 0, 23)/*mantisa*/ != 0)); |
| 406 | else if (len == 8) |
| 407 | val = (bit_extract_simple (p, 52, 11)/*exponent*/ == 0x7ff |
| 408 | || (bit_extract_simple (p, 52, 11)/*exponent*/ == 0 |
| 409 | && (bit_extract_simple (p, 0, 32)/*low mantisa*/ != 0 |
| 410 | || bit_extract_simple (p, 32, 20)/*high mantisa*/ != 0))); |
| 411 | else |
| 412 | val = 1; |
| 413 | return (val); |
| 414 | } |
| 415 | #else |
| 416 | /* Assumes the bytes have been swapped to local order. */ |
| 417 | typedef union |
| 418 | { |
| 419 | double d; |
| 420 | float f; |
| 421 | struct { unsigned m:23, e:8, :1;} sf; |
| 422 | struct { unsigned lm; unsigned m:20, e:11, :1;} sd; |
| 423 | } float_type_u; |
| 424 | |
| 425 | static int |
| 426 | invalid_float (float_type_u *p, int len) |
| 427 | { |
| 428 | int val; |
| 429 | |
| 430 | if (len == sizeof (float)) |
| 431 | val = (p->sf.e == 0xff |
| 432 | || (p->sf.e == 0 && p->sf.m != 0)); |
| 433 | else if (len == sizeof (double)) |
| 434 | val = (p->sd.e == 0x7ff |
| 435 | || (p->sd.e == 0 && (p->sd.m != 0 || p->sd.lm != 0))); |
| 436 | else |
| 437 | val = 1; |
| 438 | return val; |
| 439 | } |
| 440 | #endif |
| 441 | |
| 442 | /* Print an instruction operand of category given by d. IOFFSET is |
| 443 | the bit position below which small (<1 byte) parts of the operand can |
| 444 | be found (usually in the basic instruction, but for indexed |
| 445 | addressing it can be in the index byte). AOFFSETP is a pointer to the |
| 446 | bit position of the addressing extension. BUFFER contains the |
| 447 | instruction. ADDR is where BUFFER was read from. Put the disassembled |
| 448 | version of the operand in RESULT. INDEX_OFFSET is the bit position |
| 449 | of the index byte (it contains garbage if this operand is not a |
| 450 | general operand using scaled indexed addressing mode). */ |
| 451 | |
| 452 | static int |
| 453 | print_insn_arg (int d, |
| 454 | int ioffset, |
| 455 | int *aoffsetp, |
| 456 | bfd_byte *buffer, |
| 457 | bfd_vma addr, |
| 458 | char *result, |
| 459 | int index_offset) |
| 460 | { |
| 461 | union |
| 462 | { |
| 463 | float f; |
| 464 | double d; |
| 465 | int i[2]; |
| 466 | } value; |
| 467 | int Ivalue; |
| 468 | int addr_mode; |
| 469 | int disp1, disp2; |
| 470 | int index; |
| 471 | int size; |
| 472 | |
| 473 | switch (d) |
| 474 | { |
| 475 | case 'f': |
| 476 | /* A "gen" operand but 5 bits from the end of instruction. */ |
| 477 | ioffset -= 5; |
| 478 | case 'Z': |
| 479 | case 'F': |
| 480 | case 'L': |
| 481 | case 'I': |
| 482 | case 'B': |
| 483 | case 'W': |
| 484 | case 'D': |
| 485 | case 'A': |
| 486 | addr_mode = bit_extract (buffer, ioffset - 5, 5); |
| 487 | ioffset -= 5; |
| 488 | switch (addr_mode) |
| 489 | { |
| 490 | case 0x0: case 0x1: case 0x2: case 0x3: |
| 491 | case 0x4: case 0x5: case 0x6: case 0x7: |
| 492 | /* Register mode R0 -- R7. */ |
| 493 | switch (d) |
| 494 | { |
| 495 | case 'F': |
| 496 | case 'L': |
| 497 | case 'Z': |
| 498 | sprintf (result, "f%d", addr_mode); |
| 499 | break; |
| 500 | default: |
| 501 | sprintf (result, "r%d", addr_mode); |
| 502 | } |
| 503 | break; |
| 504 | case 0x8: case 0x9: case 0xa: case 0xb: |
| 505 | case 0xc: case 0xd: case 0xe: case 0xf: |
| 506 | /* Register relative disp(R0 -- R7). */ |
| 507 | disp1 = get_displacement (buffer, aoffsetp); |
| 508 | sprintf (result, "%d(r%d)", disp1, addr_mode & 7); |
| 509 | break; |
| 510 | case 0x10: |
| 511 | case 0x11: |
| 512 | case 0x12: |
| 513 | /* Memory relative disp2(disp1(FP, SP, SB)). */ |
| 514 | disp1 = get_displacement (buffer, aoffsetp); |
| 515 | disp2 = get_displacement (buffer, aoffsetp); |
| 516 | sprintf (result, "%d(%d(%s))", disp2, disp1, |
| 517 | addr_mode == 0x10 ? "fp" : addr_mode == 0x11 ? "sp" : "sb"); |
| 518 | break; |
| 519 | case 0x13: |
| 520 | /* Reserved. */ |
| 521 | sprintf (result, "reserved"); |
| 522 | break; |
| 523 | case 0x14: |
| 524 | /* Immediate. */ |
| 525 | switch (d) |
| 526 | { |
| 527 | case 'I': |
| 528 | case 'Z': |
| 529 | case 'A': |
| 530 | /* I and Z are output operands and can`t be immediate |
| 531 | A is an address and we can`t have the address of |
| 532 | an immediate either. We don't know how much to increase |
| 533 | aoffsetp by since whatever generated this is broken |
| 534 | anyway! */ |
| 535 | sprintf (result, _("$<undefined>")); |
| 536 | break; |
| 537 | case 'B': |
| 538 | Ivalue = bit_extract (buffer, *aoffsetp, 8); |
| 539 | Ivalue = sign_extend (Ivalue, 8); |
| 540 | *aoffsetp += 8; |
| 541 | sprintf (result, "$%d", Ivalue); |
| 542 | break; |
| 543 | case 'W': |
| 544 | Ivalue = bit_extract (buffer, *aoffsetp, 16); |
| 545 | flip_bytes ((char *) & Ivalue, 2); |
| 546 | *aoffsetp += 16; |
| 547 | Ivalue = sign_extend (Ivalue, 16); |
| 548 | sprintf (result, "$%d", Ivalue); |
| 549 | break; |
| 550 | case 'D': |
| 551 | Ivalue = bit_extract (buffer, *aoffsetp, 32); |
| 552 | flip_bytes ((char *) & Ivalue, 4); |
| 553 | *aoffsetp += 32; |
| 554 | sprintf (result, "$%d", Ivalue); |
| 555 | break; |
| 556 | case 'F': |
| 557 | bit_copy (buffer, *aoffsetp, 32, (char *) &value.f); |
| 558 | flip_bytes ((char *) &value.f, 4); |
| 559 | *aoffsetp += 32; |
| 560 | if (INVALID_FLOAT (&value.f, 4)) |
| 561 | sprintf (result, "<<invalid float 0x%.8x>>", value.i[0]); |
| 562 | else /* Assume host has ieee float. */ |
| 563 | sprintf (result, "$%g", value.f); |
| 564 | break; |
| 565 | case 'L': |
| 566 | bit_copy (buffer, *aoffsetp, 64, (char *) &value.d); |
| 567 | flip_bytes ((char *) &value.d, 8); |
| 568 | *aoffsetp += 64; |
| 569 | if (INVALID_FLOAT (&value.d, 8)) |
| 570 | sprintf (result, "<<invalid double 0x%.8x%.8x>>", |
| 571 | value.i[1], value.i[0]); |
| 572 | else /* Assume host has ieee float. */ |
| 573 | sprintf (result, "$%g", value.d); |
| 574 | break; |
| 575 | } |
| 576 | break; |
| 577 | case 0x15: |
| 578 | /* Absolute @disp. */ |
| 579 | disp1 = get_displacement (buffer, aoffsetp); |
| 580 | sprintf (result, "@|%d|", disp1); |
| 581 | break; |
| 582 | case 0x16: |
| 583 | /* External EXT(disp1) + disp2 (Mod table stuff). */ |
| 584 | disp1 = get_displacement (buffer, aoffsetp); |
| 585 | disp2 = get_displacement (buffer, aoffsetp); |
| 586 | sprintf (result, "EXT(%d) + %d", disp1, disp2); |
| 587 | break; |
| 588 | case 0x17: |
| 589 | /* Top of stack tos. */ |
| 590 | sprintf (result, "tos"); |
| 591 | break; |
| 592 | case 0x18: |
| 593 | /* Memory space disp(FP). */ |
| 594 | disp1 = get_displacement (buffer, aoffsetp); |
| 595 | sprintf (result, "%d(fp)", disp1); |
| 596 | break; |
| 597 | case 0x19: |
| 598 | /* Memory space disp(SP). */ |
| 599 | disp1 = get_displacement (buffer, aoffsetp); |
| 600 | sprintf (result, "%d(sp)", disp1); |
| 601 | break; |
| 602 | case 0x1a: |
| 603 | /* Memory space disp(SB). */ |
| 604 | disp1 = get_displacement (buffer, aoffsetp); |
| 605 | sprintf (result, "%d(sb)", disp1); |
| 606 | break; |
| 607 | case 0x1b: |
| 608 | /* Memory space disp(PC). */ |
| 609 | disp1 = get_displacement (buffer, aoffsetp); |
| 610 | *result++ = NEXT_IS_ADDR; |
| 611 | sprintf_vma (result, addr + disp1); |
| 612 | result += strlen (result); |
| 613 | *result++ = NEXT_IS_ADDR; |
| 614 | *result = '\0'; |
| 615 | break; |
| 616 | case 0x1c: |
| 617 | case 0x1d: |
| 618 | case 0x1e: |
| 619 | case 0x1f: |
| 620 | /* Scaled index basemode[R0 -- R7:B,W,D,Q]. */ |
| 621 | index = bit_extract (buffer, index_offset - 8, 3); |
| 622 | print_insn_arg (d, index_offset, aoffsetp, buffer, addr, |
| 623 | result, 0); |
| 624 | { |
| 625 | static const char *ind = "bwdq"; |
| 626 | char *off; |
| 627 | |
| 628 | off = result + strlen (result); |
| 629 | sprintf (off, "[r%d:%c]", index, |
| 630 | ind[addr_mode & 3]); |
| 631 | } |
| 632 | break; |
| 633 | } |
| 634 | break; |
| 635 | case 'H': |
| 636 | case 'q': |
| 637 | Ivalue = bit_extract (buffer, ioffset-4, 4); |
| 638 | Ivalue = sign_extend (Ivalue, 4); |
| 639 | sprintf (result, "%d", Ivalue); |
| 640 | ioffset -= 4; |
| 641 | break; |
| 642 | case 'r': |
| 643 | Ivalue = bit_extract (buffer, ioffset-3, 3); |
| 644 | sprintf (result, "r%d", Ivalue&7); |
| 645 | ioffset -= 3; |
| 646 | break; |
| 647 | case 'd': |
| 648 | sprintf (result, "%d", get_displacement (buffer, aoffsetp)); |
| 649 | break; |
| 650 | case 'b': |
| 651 | Ivalue = get_displacement (buffer, aoffsetp); |
| 652 | /* Warning!! HACK ALERT! |
| 653 | Operand type 'b' is only used by the cmp{b,w,d} and |
| 654 | movm{b,w,d} instructions; we need to know whether |
| 655 | it's a `b' or `w' or `d' instruction; and for both |
| 656 | cmpm and movm it's stored at the same place so we |
| 657 | just grab two bits of the opcode and look at it... */ |
| 658 | size = bit_extract(buffer, ioffset-6, 2); |
| 659 | if (size == 0) /* 00 => b. */ |
| 660 | size = 1; |
| 661 | else if (size == 1) /* 01 => w. */ |
| 662 | size = 2; |
| 663 | else |
| 664 | size = 4; /* 11 => d. */ |
| 665 | |
| 666 | sprintf (result, "%d", (Ivalue / size) + 1); |
| 667 | break; |
| 668 | case 'p': |
| 669 | *result++ = NEXT_IS_ADDR; |
| 670 | sprintf_vma (result, addr + get_displacement (buffer, aoffsetp)); |
| 671 | result += strlen (result); |
| 672 | *result++ = NEXT_IS_ADDR; |
| 673 | *result = '\0'; |
| 674 | break; |
| 675 | case 'i': |
| 676 | Ivalue = bit_extract (buffer, *aoffsetp, 8); |
| 677 | *aoffsetp += 8; |
| 678 | sprintf (result, "0x%x", Ivalue); |
| 679 | break; |
| 680 | case 'u': |
| 681 | Ivalue = bit_extract (buffer, *aoffsetp, 8); |
| 682 | optlist (Ivalue, opt_u, result); |
| 683 | *aoffsetp += 8; |
| 684 | break; |
| 685 | case 'U': |
| 686 | Ivalue = bit_extract (buffer, *aoffsetp, 8); |
| 687 | optlist (Ivalue, opt_U, result); |
| 688 | *aoffsetp += 8; |
| 689 | break; |
| 690 | case 'O': |
| 691 | Ivalue = bit_extract (buffer, ioffset - 9, 9); |
| 692 | optlist (Ivalue, opt_O, result); |
| 693 | ioffset -= 9; |
| 694 | break; |
| 695 | case 'C': |
| 696 | Ivalue = bit_extract (buffer, ioffset - 4, 4); |
| 697 | optlist (Ivalue, opt_C, result); |
| 698 | ioffset -= 4; |
| 699 | break; |
| 700 | case 'S': |
| 701 | Ivalue = bit_extract (buffer, ioffset - 8, 8); |
| 702 | optlist (Ivalue, opt_S, result); |
| 703 | ioffset -= 8; |
| 704 | break; |
| 705 | case 'M': |
| 706 | Ivalue = bit_extract (buffer, ioffset - 4, 4); |
| 707 | list_search (Ivalue, 0 ? list_M032 : list_M532, result); |
| 708 | ioffset -= 4; |
| 709 | break; |
| 710 | case 'P': |
| 711 | Ivalue = bit_extract (buffer, ioffset - 4, 4); |
| 712 | list_search (Ivalue, 0 ? list_P032 : list_P532, result); |
| 713 | ioffset -= 4; |
| 714 | break; |
| 715 | case 'g': |
| 716 | Ivalue = bit_extract (buffer, *aoffsetp, 3); |
| 717 | sprintf (result, "%d", Ivalue); |
| 718 | *aoffsetp += 3; |
| 719 | break; |
| 720 | case 'G': |
| 721 | Ivalue = bit_extract(buffer, *aoffsetp, 5); |
| 722 | sprintf (result, "%d", Ivalue + 1); |
| 723 | *aoffsetp += 5; |
| 724 | break; |
| 725 | } |
| 726 | return ioffset; |
| 727 | } |
| 728 | |
| 729 | \f |
| 730 | /* Print the 32000 instruction at address MEMADDR in debugged memory, |
| 731 | on STREAM. Returns length of the instruction, in bytes. */ |
| 732 | |
| 733 | int |
| 734 | print_insn_ns32k (bfd_vma memaddr, disassemble_info *info) |
| 735 | { |
| 736 | unsigned int i; |
| 737 | const char *d; |
| 738 | unsigned short first_word; |
| 739 | int ioffset; /* Bits into instruction. */ |
| 740 | int aoffset; /* Bits into arguments. */ |
| 741 | char arg_bufs[MAX_ARGS+1][ARG_LEN]; |
| 742 | int argnum; |
| 743 | int maxarg; |
| 744 | struct private priv; |
| 745 | bfd_byte *buffer = priv.the_buffer; |
| 746 | dis_info = info; |
| 747 | |
| 748 | info->private_data = & priv; |
| 749 | priv.max_fetched = priv.the_buffer; |
| 750 | priv.insn_start = memaddr; |
| 751 | if (setjmp (priv.bailout) != 0) |
| 752 | /* Error return. */ |
| 753 | return -1; |
| 754 | |
| 755 | /* Look for 8bit opcodes first. Other wise, fetching two bytes could take |
| 756 | us over the end of accessible data unnecessarilly. */ |
| 757 | FETCH_DATA (info, buffer + 1); |
| 758 | for (i = 0; i < NOPCODES; i++) |
| 759 | if (ns32k_opcodes[i].opcode_id_size <= 8 |
| 760 | && ((buffer[0] |
| 761 | & (((unsigned long) 1 << ns32k_opcodes[i].opcode_id_size) - 1)) |
| 762 | == ns32k_opcodes[i].opcode_seed)) |
| 763 | break; |
| 764 | if (i == NOPCODES) |
| 765 | { |
| 766 | /* Maybe it is 9 to 16 bits big. */ |
| 767 | FETCH_DATA (info, buffer + 2); |
| 768 | first_word = read_memory_integer(buffer, 2); |
| 769 | |
| 770 | for (i = 0; i < NOPCODES; i++) |
| 771 | if ((first_word |
| 772 | & (((unsigned long) 1 << ns32k_opcodes[i].opcode_id_size) - 1)) |
| 773 | == ns32k_opcodes[i].opcode_seed) |
| 774 | break; |
| 775 | |
| 776 | /* Handle undefined instructions. */ |
| 777 | if (i == NOPCODES) |
| 778 | { |
| 779 | (*dis_info->fprintf_func)(dis_info->stream, "0%o", buffer[0]); |
| 780 | return 1; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | (*dis_info->fprintf_func)(dis_info->stream, "%s", ns32k_opcodes[i].name); |
| 785 | |
| 786 | ioffset = ns32k_opcodes[i].opcode_size; |
| 787 | aoffset = ns32k_opcodes[i].opcode_size; |
| 788 | d = ns32k_opcodes[i].operands; |
| 789 | |
| 790 | if (*d) |
| 791 | { |
| 792 | /* Offset in bits of the first thing beyond each index byte. |
| 793 | Element 0 is for operand A and element 1 is for operand B. |
| 794 | The rest are irrelevant, but we put them here so we don't |
| 795 | index outside the array. */ |
| 796 | int index_offset[MAX_ARGS]; |
| 797 | |
| 798 | /* 0 for operand A, 1 for operand B, greater for other args. */ |
| 799 | int whicharg = 0; |
| 800 | |
| 801 | (*dis_info->fprintf_func)(dis_info->stream, "\t"); |
| 802 | |
| 803 | maxarg = 0; |
| 804 | |
| 805 | /* First we have to find and keep track of the index bytes, |
| 806 | if we are using scaled indexed addressing mode, since the index |
| 807 | bytes occur right after the basic instruction, not as part |
| 808 | of the addressing extension. */ |
| 809 | if (Is_gen(d[1])) |
| 810 | { |
| 811 | int addr_mode = bit_extract (buffer, ioffset - 5, 5); |
| 812 | |
| 813 | if (Adrmod_is_index (addr_mode)) |
| 814 | { |
| 815 | aoffset += 8; |
| 816 | index_offset[0] = aoffset; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | if (d[2] && Is_gen(d[3])) |
| 821 | { |
| 822 | int addr_mode = bit_extract (buffer, ioffset - 10, 5); |
| 823 | |
| 824 | if (Adrmod_is_index (addr_mode)) |
| 825 | { |
| 826 | aoffset += 8; |
| 827 | index_offset[1] = aoffset; |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | while (*d) |
| 832 | { |
| 833 | argnum = *d - '1'; |
| 834 | d++; |
| 835 | if (argnum > maxarg && argnum < MAX_ARGS) |
| 836 | maxarg = argnum; |
| 837 | ioffset = print_insn_arg (*d, ioffset, &aoffset, buffer, |
| 838 | memaddr, arg_bufs[argnum], |
| 839 | index_offset[whicharg]); |
| 840 | d++; |
| 841 | whicharg++; |
| 842 | } |
| 843 | for (argnum = 0; argnum <= maxarg; argnum++) |
| 844 | { |
| 845 | bfd_vma addr; |
| 846 | char *ch; |
| 847 | |
| 848 | for (ch = arg_bufs[argnum]; *ch;) |
| 849 | { |
| 850 | if (*ch == NEXT_IS_ADDR) |
| 851 | { |
| 852 | ++ch; |
| 853 | addr = bfd_scan_vma (ch, NULL, 16); |
| 854 | (*dis_info->print_address_func) (addr, dis_info); |
| 855 | while (*ch && *ch != NEXT_IS_ADDR) |
| 856 | ++ch; |
| 857 | if (*ch) |
| 858 | ++ch; |
| 859 | } |
| 860 | else |
| 861 | (*dis_info->fprintf_func)(dis_info->stream, "%c", *ch++); |
| 862 | } |
| 863 | if (argnum < maxarg) |
| 864 | (*dis_info->fprintf_func)(dis_info->stream, ", "); |
| 865 | } |
| 866 | } |
| 867 | return aoffset / 8; |
| 868 | } |