| 1 | /* Print i386 instructions for GDB, the GNU debugger. |
| 2 | Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | /* |
| 21 | * 80386 instruction printer by Pace Willisson (pace@prep.ai.mit.edu) |
| 22 | * July 1988 |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * The main tables describing the instructions is essentially a copy |
| 27 | * of the "Opcode Map" chapter (Appendix A) of the Intel 80386 |
| 28 | * Programmers Manual. Usually, there is a capital letter, followed |
| 29 | * by a small letter. The capital letter tell the addressing mode, |
| 30 | * and the small letter tells about the operand size. Refer to |
| 31 | * the Intel manual for details. |
| 32 | */ |
| 33 | |
| 34 | #include "defs.h" |
| 35 | |
| 36 | #include <ctype.h> |
| 37 | |
| 38 | /* For the GDB interface at the bottom of the file... */ |
| 39 | #include "gdbcore.h" |
| 40 | |
| 41 | #define Eb OP_E, b_mode |
| 42 | #define indirEb OP_indirE, b_mode |
| 43 | #define Gb OP_G, b_mode |
| 44 | #define Ev OP_E, v_mode |
| 45 | #define indirEv OP_indirE, v_mode |
| 46 | #define Ew OP_E, w_mode |
| 47 | #define Ma OP_E, v_mode |
| 48 | #define M OP_E, 0 |
| 49 | #define Mp OP_E, 0 /* ? */ |
| 50 | #define Gv OP_G, v_mode |
| 51 | #define Gw OP_G, w_mode |
| 52 | #define Rw OP_rm, w_mode |
| 53 | #define Rd OP_rm, d_mode |
| 54 | #define Ib OP_I, b_mode |
| 55 | #define sIb OP_sI, b_mode /* sign extened byte */ |
| 56 | #define Iv OP_I, v_mode |
| 57 | #define Iw OP_I, w_mode |
| 58 | #define Jb OP_J, b_mode |
| 59 | #define Jv OP_J, v_mode |
| 60 | #define ONE OP_ONE, 0 |
| 61 | #define Cd OP_C, d_mode |
| 62 | #define Dd OP_D, d_mode |
| 63 | #define Td OP_T, d_mode |
| 64 | |
| 65 | #define eAX OP_REG, eAX_reg |
| 66 | #define eBX OP_REG, eBX_reg |
| 67 | #define eCX OP_REG, eCX_reg |
| 68 | #define eDX OP_REG, eDX_reg |
| 69 | #define eSP OP_REG, eSP_reg |
| 70 | #define eBP OP_REG, eBP_reg |
| 71 | #define eSI OP_REG, eSI_reg |
| 72 | #define eDI OP_REG, eDI_reg |
| 73 | #define AL OP_REG, al_reg |
| 74 | #define CL OP_REG, cl_reg |
| 75 | #define DL OP_REG, dl_reg |
| 76 | #define BL OP_REG, bl_reg |
| 77 | #define AH OP_REG, ah_reg |
| 78 | #define CH OP_REG, ch_reg |
| 79 | #define DH OP_REG, dh_reg |
| 80 | #define BH OP_REG, bh_reg |
| 81 | #define AX OP_REG, ax_reg |
| 82 | #define DX OP_REG, dx_reg |
| 83 | #define indirDX OP_REG, indir_dx_reg |
| 84 | |
| 85 | #define Sw OP_SEG, w_mode |
| 86 | #define Ap OP_DIR, lptr |
| 87 | #define Av OP_DIR, v_mode |
| 88 | #define Ob OP_OFF, b_mode |
| 89 | #define Ov OP_OFF, v_mode |
| 90 | #define Xb OP_DSSI, b_mode |
| 91 | #define Xv OP_DSSI, v_mode |
| 92 | #define Yb OP_ESDI, b_mode |
| 93 | #define Yv OP_ESDI, v_mode |
| 94 | |
| 95 | #define es OP_REG, es_reg |
| 96 | #define ss OP_REG, ss_reg |
| 97 | #define cs OP_REG, cs_reg |
| 98 | #define ds OP_REG, ds_reg |
| 99 | #define fs OP_REG, fs_reg |
| 100 | #define gs OP_REG, gs_reg |
| 101 | |
| 102 | int OP_E(), OP_indirE(), OP_G(), OP_I(), OP_sI(), OP_REG(); |
| 103 | int OP_J(), OP_SEG(); |
| 104 | int OP_DIR(), OP_OFF(), OP_DSSI(), OP_ESDI(), OP_ONE(), OP_C(); |
| 105 | int OP_D(), OP_T(), OP_rm(); |
| 106 | |
| 107 | static void dofloat (), putop (), append_prefix (), set_op (); |
| 108 | static int get16 (), get32 (); |
| 109 | |
| 110 | #define b_mode 1 |
| 111 | #define v_mode 2 |
| 112 | #define w_mode 3 |
| 113 | #define d_mode 4 |
| 114 | |
| 115 | #define es_reg 100 |
| 116 | #define cs_reg 101 |
| 117 | #define ss_reg 102 |
| 118 | #define ds_reg 103 |
| 119 | #define fs_reg 104 |
| 120 | #define gs_reg 105 |
| 121 | #define eAX_reg 107 |
| 122 | #define eCX_reg 108 |
| 123 | #define eDX_reg 109 |
| 124 | #define eBX_reg 110 |
| 125 | #define eSP_reg 111 |
| 126 | #define eBP_reg 112 |
| 127 | #define eSI_reg 113 |
| 128 | #define eDI_reg 114 |
| 129 | |
| 130 | #define lptr 115 |
| 131 | |
| 132 | #define al_reg 116 |
| 133 | #define cl_reg 117 |
| 134 | #define dl_reg 118 |
| 135 | #define bl_reg 119 |
| 136 | #define ah_reg 120 |
| 137 | #define ch_reg 121 |
| 138 | #define dh_reg 122 |
| 139 | #define bh_reg 123 |
| 140 | |
| 141 | #define ax_reg 124 |
| 142 | #define cx_reg 125 |
| 143 | #define dx_reg 126 |
| 144 | #define bx_reg 127 |
| 145 | #define sp_reg 128 |
| 146 | #define bp_reg 129 |
| 147 | #define si_reg 130 |
| 148 | #define di_reg 131 |
| 149 | |
| 150 | #define indir_dx_reg 150 |
| 151 | |
| 152 | #define GRP1b NULL, NULL, 0 |
| 153 | #define GRP1S NULL, NULL, 1 |
| 154 | #define GRP1Ss NULL, NULL, 2 |
| 155 | #define GRP2b NULL, NULL, 3 |
| 156 | #define GRP2S NULL, NULL, 4 |
| 157 | #define GRP2b_one NULL, NULL, 5 |
| 158 | #define GRP2S_one NULL, NULL, 6 |
| 159 | #define GRP2b_cl NULL, NULL, 7 |
| 160 | #define GRP2S_cl NULL, NULL, 8 |
| 161 | #define GRP3b NULL, NULL, 9 |
| 162 | #define GRP3S NULL, NULL, 10 |
| 163 | #define GRP4 NULL, NULL, 11 |
| 164 | #define GRP5 NULL, NULL, 12 |
| 165 | #define GRP6 NULL, NULL, 13 |
| 166 | #define GRP7 NULL, NULL, 14 |
| 167 | #define GRP8 NULL, NULL, 15 |
| 168 | |
| 169 | #define FLOATCODE 50 |
| 170 | #define FLOAT NULL, NULL, FLOATCODE |
| 171 | |
| 172 | struct dis386 { |
| 173 | char *name; |
| 174 | int (*op1)(); |
| 175 | int bytemode1; |
| 176 | int (*op2)(); |
| 177 | int bytemode2; |
| 178 | int (*op3)(); |
| 179 | int bytemode3; |
| 180 | }; |
| 181 | |
| 182 | struct dis386 dis386[] = { |
| 183 | /* 00 */ |
| 184 | { "addb", Eb, Gb }, |
| 185 | { "addS", Ev, Gv }, |
| 186 | { "addb", Gb, Eb }, |
| 187 | { "addS", Gv, Ev }, |
| 188 | { "addb", AL, Ib }, |
| 189 | { "addS", eAX, Iv }, |
| 190 | { "pushl", es }, |
| 191 | { "popl", es }, |
| 192 | /* 08 */ |
| 193 | { "orb", Eb, Gb }, |
| 194 | { "orS", Ev, Gv }, |
| 195 | { "orb", Gb, Eb }, |
| 196 | { "orS", Gv, Ev }, |
| 197 | { "orb", AL, Ib }, |
| 198 | { "orS", eAX, Iv }, |
| 199 | { "pushl", cs }, |
| 200 | { "(bad)" }, /* 0x0f extended opcode escape */ |
| 201 | /* 10 */ |
| 202 | { "adcb", Eb, Gb }, |
| 203 | { "adcS", Ev, Gv }, |
| 204 | { "adcb", Gb, Eb }, |
| 205 | { "adcS", Gv, Ev }, |
| 206 | { "adcb", AL, Ib }, |
| 207 | { "adcS", eAX, Iv }, |
| 208 | { "pushl", ss }, |
| 209 | { "popl", ss }, |
| 210 | /* 18 */ |
| 211 | { "sbbb", Eb, Gb }, |
| 212 | { "sbbS", Ev, Gv }, |
| 213 | { "sbbb", Gb, Eb }, |
| 214 | { "sbbS", Gv, Ev }, |
| 215 | { "sbbb", AL, Ib }, |
| 216 | { "sbbS", eAX, Iv }, |
| 217 | { "pushl", ds }, |
| 218 | { "popl", ds }, |
| 219 | /* 20 */ |
| 220 | { "andb", Eb, Gb }, |
| 221 | { "andS", Ev, Gv }, |
| 222 | { "andb", Gb, Eb }, |
| 223 | { "andS", Gv, Ev }, |
| 224 | { "andb", AL, Ib }, |
| 225 | { "andS", eAX, Iv }, |
| 226 | { "(bad)" }, /* SEG ES prefix */ |
| 227 | { "daa" }, |
| 228 | /* 28 */ |
| 229 | { "subb", Eb, Gb }, |
| 230 | { "subS", Ev, Gv }, |
| 231 | { "subb", Gb, Eb }, |
| 232 | { "subS", Gv, Ev }, |
| 233 | { "subb", AL, Ib }, |
| 234 | { "subS", eAX, Iv }, |
| 235 | { "(bad)" }, /* SEG CS prefix */ |
| 236 | { "das" }, |
| 237 | /* 30 */ |
| 238 | { "xorb", Eb, Gb }, |
| 239 | { "xorS", Ev, Gv }, |
| 240 | { "xorb", Gb, Eb }, |
| 241 | { "xorS", Gv, Ev }, |
| 242 | { "xorb", AL, Ib }, |
| 243 | { "xorS", eAX, Iv }, |
| 244 | { "(bad)" }, /* SEG SS prefix */ |
| 245 | { "aaa" }, |
| 246 | /* 38 */ |
| 247 | { "cmpb", Eb, Gb }, |
| 248 | { "cmpS", Ev, Gv }, |
| 249 | { "cmpb", Gb, Eb }, |
| 250 | { "cmpS", Gv, Ev }, |
| 251 | { "cmpb", AL, Ib }, |
| 252 | { "cmpS", eAX, Iv }, |
| 253 | { "(bad)" }, /* SEG DS prefix */ |
| 254 | { "aas" }, |
| 255 | /* 40 */ |
| 256 | { "incS", eAX }, |
| 257 | { "incS", eCX }, |
| 258 | { "incS", eDX }, |
| 259 | { "incS", eBX }, |
| 260 | { "incS", eSP }, |
| 261 | { "incS", eBP }, |
| 262 | { "incS", eSI }, |
| 263 | { "incS", eDI }, |
| 264 | /* 48 */ |
| 265 | { "decS", eAX }, |
| 266 | { "decS", eCX }, |
| 267 | { "decS", eDX }, |
| 268 | { "decS", eBX }, |
| 269 | { "decS", eSP }, |
| 270 | { "decS", eBP }, |
| 271 | { "decS", eSI }, |
| 272 | { "decS", eDI }, |
| 273 | /* 50 */ |
| 274 | { "pushS", eAX }, |
| 275 | { "pushS", eCX }, |
| 276 | { "pushS", eDX }, |
| 277 | { "pushS", eBX }, |
| 278 | { "pushS", eSP }, |
| 279 | { "pushS", eBP }, |
| 280 | { "pushS", eSI }, |
| 281 | { "pushS", eDI }, |
| 282 | /* 58 */ |
| 283 | { "popS", eAX }, |
| 284 | { "popS", eCX }, |
| 285 | { "popS", eDX }, |
| 286 | { "popS", eBX }, |
| 287 | { "popS", eSP }, |
| 288 | { "popS", eBP }, |
| 289 | { "popS", eSI }, |
| 290 | { "popS", eDI }, |
| 291 | /* 60 */ |
| 292 | { "pusha" }, |
| 293 | { "popa" }, |
| 294 | { "boundS", Gv, Ma }, |
| 295 | { "arpl", Ew, Gw }, |
| 296 | { "(bad)" }, /* seg fs */ |
| 297 | { "(bad)" }, /* seg gs */ |
| 298 | { "(bad)" }, /* op size prefix */ |
| 299 | { "(bad)" }, /* adr size prefix */ |
| 300 | /* 68 */ |
| 301 | { "pushS", Iv }, /* 386 book wrong */ |
| 302 | { "imulS", Gv, Ev, Iv }, |
| 303 | { "pushl", sIb }, /* push of byte really pushes 4 bytes */ |
| 304 | { "imulS", Gv, Ev, Ib }, |
| 305 | { "insb", Yb, indirDX }, |
| 306 | { "insS", Yv, indirDX }, |
| 307 | { "outsb", indirDX, Xb }, |
| 308 | { "outsS", indirDX, Xv }, |
| 309 | /* 70 */ |
| 310 | { "jo", Jb }, |
| 311 | { "jno", Jb }, |
| 312 | { "jb", Jb }, |
| 313 | { "jae", Jb }, |
| 314 | { "je", Jb }, |
| 315 | { "jne", Jb }, |
| 316 | { "jbe", Jb }, |
| 317 | { "ja", Jb }, |
| 318 | /* 78 */ |
| 319 | { "js", Jb }, |
| 320 | { "jns", Jb }, |
| 321 | { "jp", Jb }, |
| 322 | { "jnp", Jb }, |
| 323 | { "jl", Jb }, |
| 324 | { "jnl", Jb }, |
| 325 | { "jle", Jb }, |
| 326 | { "jg", Jb }, |
| 327 | /* 80 */ |
| 328 | { GRP1b }, |
| 329 | { GRP1S }, |
| 330 | { "(bad)" }, |
| 331 | { GRP1Ss }, |
| 332 | { "testb", Eb, Gb }, |
| 333 | { "testS", Ev, Gv }, |
| 334 | { "xchgb", Eb, Gb }, |
| 335 | { "xchgS", Ev, Gv }, |
| 336 | /* 88 */ |
| 337 | { "movb", Eb, Gb }, |
| 338 | { "movS", Ev, Gv }, |
| 339 | { "movb", Gb, Eb }, |
| 340 | { "movS", Gv, Ev }, |
| 341 | { "movw", Ew, Sw }, |
| 342 | { "leaS", Gv, M }, |
| 343 | { "movw", Sw, Ew }, |
| 344 | { "popS", Ev }, |
| 345 | /* 90 */ |
| 346 | { "nop" }, |
| 347 | { "xchgS", eCX, eAX }, |
| 348 | { "xchgS", eDX, eAX }, |
| 349 | { "xchgS", eBX, eAX }, |
| 350 | { "xchgS", eSP, eAX }, |
| 351 | { "xchgS", eBP, eAX }, |
| 352 | { "xchgS", eSI, eAX }, |
| 353 | { "xchgS", eDI, eAX }, |
| 354 | /* 98 */ |
| 355 | { "cwtl" }, |
| 356 | { "cltd" }, |
| 357 | { "lcall", Ap }, |
| 358 | { "(bad)" }, /* fwait */ |
| 359 | { "pushf" }, |
| 360 | { "popf" }, |
| 361 | { "sahf" }, |
| 362 | { "lahf" }, |
| 363 | /* a0 */ |
| 364 | { "movb", AL, Ob }, |
| 365 | { "movS", eAX, Ov }, |
| 366 | { "movb", Ob, AL }, |
| 367 | { "movS", Ov, eAX }, |
| 368 | { "movsb", Yb, Xb }, |
| 369 | { "movsS", Yv, Xv }, |
| 370 | { "cmpsb", Yb, Xb }, |
| 371 | { "cmpsS", Yv, Xv }, |
| 372 | /* a8 */ |
| 373 | { "testb", AL, Ib }, |
| 374 | { "testS", eAX, Iv }, |
| 375 | { "stosb", Yb, AL }, |
| 376 | { "stosS", Yv, eAX }, |
| 377 | { "lodsb", AL, Xb }, |
| 378 | { "lodsS", eAX, Xv }, |
| 379 | { "scasb", AL, Xb }, |
| 380 | { "scasS", eAX, Xv }, |
| 381 | /* b0 */ |
| 382 | { "movb", AL, Ib }, |
| 383 | { "movb", CL, Ib }, |
| 384 | { "movb", DL, Ib }, |
| 385 | { "movb", BL, Ib }, |
| 386 | { "movb", AH, Ib }, |
| 387 | { "movb", CH, Ib }, |
| 388 | { "movb", DH, Ib }, |
| 389 | { "movb", BH, Ib }, |
| 390 | /* b8 */ |
| 391 | { "movS", eAX, Iv }, |
| 392 | { "movS", eCX, Iv }, |
| 393 | { "movS", eDX, Iv }, |
| 394 | { "movS", eBX, Iv }, |
| 395 | { "movS", eSP, Iv }, |
| 396 | { "movS", eBP, Iv }, |
| 397 | { "movS", eSI, Iv }, |
| 398 | { "movS", eDI, Iv }, |
| 399 | /* c0 */ |
| 400 | { GRP2b }, |
| 401 | { GRP2S }, |
| 402 | { "ret", Iw }, |
| 403 | { "ret" }, |
| 404 | { "lesS", Gv, Mp }, |
| 405 | { "ldsS", Gv, Mp }, |
| 406 | { "movb", Eb, Ib }, |
| 407 | { "movS", Ev, Iv }, |
| 408 | /* c8 */ |
| 409 | { "enter", Iw, Ib }, |
| 410 | { "leave" }, |
| 411 | { "lret", Iw }, |
| 412 | { "lret" }, |
| 413 | { "int3" }, |
| 414 | { "int", Ib }, |
| 415 | { "into" }, |
| 416 | { "iret" }, |
| 417 | /* d0 */ |
| 418 | { GRP2b_one }, |
| 419 | { GRP2S_one }, |
| 420 | { GRP2b_cl }, |
| 421 | { GRP2S_cl }, |
| 422 | { "aam", Ib }, |
| 423 | { "aad", Ib }, |
| 424 | { "(bad)" }, |
| 425 | { "xlat" }, |
| 426 | /* d8 */ |
| 427 | { FLOAT }, |
| 428 | { FLOAT }, |
| 429 | { FLOAT }, |
| 430 | { FLOAT }, |
| 431 | { FLOAT }, |
| 432 | { FLOAT }, |
| 433 | { FLOAT }, |
| 434 | { FLOAT }, |
| 435 | /* e0 */ |
| 436 | { "loopne", Jb }, |
| 437 | { "loope", Jb }, |
| 438 | { "loop", Jb }, |
| 439 | { "jCcxz", Jb }, |
| 440 | { "inb", AL, Ib }, |
| 441 | { "inS", eAX, Ib }, |
| 442 | { "outb", Ib, AL }, |
| 443 | { "outS", Ib, eAX }, |
| 444 | /* e8 */ |
| 445 | { "call", Av }, |
| 446 | { "jmp", Jv }, |
| 447 | { "ljmp", Ap }, |
| 448 | { "jmp", Jb }, |
| 449 | { "inb", AL, indirDX }, |
| 450 | { "inS", eAX, indirDX }, |
| 451 | { "outb", indirDX, AL }, |
| 452 | { "outS", indirDX, eAX }, |
| 453 | /* f0 */ |
| 454 | { "(bad)" }, /* lock prefix */ |
| 455 | { "(bad)" }, |
| 456 | { "(bad)" }, /* repne */ |
| 457 | { "(bad)" }, /* repz */ |
| 458 | { "hlt" }, |
| 459 | { "cmc" }, |
| 460 | { GRP3b }, |
| 461 | { GRP3S }, |
| 462 | /* f8 */ |
| 463 | { "clc" }, |
| 464 | { "stc" }, |
| 465 | { "cli" }, |
| 466 | { "sti" }, |
| 467 | { "cld" }, |
| 468 | { "std" }, |
| 469 | { GRP4 }, |
| 470 | { GRP5 }, |
| 471 | }; |
| 472 | |
| 473 | struct dis386 dis386_twobyte[] = { |
| 474 | /* 00 */ |
| 475 | { GRP6 }, |
| 476 | { GRP7 }, |
| 477 | { "larS", Gv, Ew }, |
| 478 | { "lslS", Gv, Ew }, |
| 479 | { "(bad)" }, |
| 480 | { "(bad)" }, |
| 481 | { "clts" }, |
| 482 | { "(bad)" }, |
| 483 | /* 08 */ |
| 484 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 485 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 486 | /* 10 */ |
| 487 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 488 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 489 | /* 18 */ |
| 490 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 491 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 492 | /* 20 */ |
| 493 | /* these are all backward in appendix A of the intel book */ |
| 494 | { "movl", Rd, Cd }, |
| 495 | { "movl", Rd, Dd }, |
| 496 | { "movl", Cd, Rd }, |
| 497 | { "movl", Dd, Rd }, |
| 498 | { "movl", Rd, Td }, |
| 499 | { "(bad)" }, |
| 500 | { "movl", Td, Rd }, |
| 501 | { "(bad)" }, |
| 502 | /* 28 */ |
| 503 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 504 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 505 | /* 30 */ |
| 506 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 507 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 508 | /* 38 */ |
| 509 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 510 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 511 | /* 40 */ |
| 512 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 513 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 514 | /* 48 */ |
| 515 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 516 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 517 | /* 50 */ |
| 518 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 519 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 520 | /* 58 */ |
| 521 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 522 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 523 | /* 60 */ |
| 524 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 525 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 526 | /* 68 */ |
| 527 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 528 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 529 | /* 70 */ |
| 530 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 531 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 532 | /* 78 */ |
| 533 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 534 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 535 | /* 80 */ |
| 536 | { "jo", Jv }, |
| 537 | { "jno", Jv }, |
| 538 | { "jb", Jv }, |
| 539 | { "jae", Jv }, |
| 540 | { "je", Jv }, |
| 541 | { "jne", Jv }, |
| 542 | { "jbe", Jv }, |
| 543 | { "ja", Jv }, |
| 544 | /* 88 */ |
| 545 | { "js", Jv }, |
| 546 | { "jns", Jv }, |
| 547 | { "jp", Jv }, |
| 548 | { "jnp", Jv }, |
| 549 | { "jl", Jv }, |
| 550 | { "jge", Jv }, |
| 551 | { "jle", Jv }, |
| 552 | { "jg", Jv }, |
| 553 | /* 90 */ |
| 554 | { "seto", Eb }, |
| 555 | { "setno", Eb }, |
| 556 | { "setb", Eb }, |
| 557 | { "setae", Eb }, |
| 558 | { "sete", Eb }, |
| 559 | { "setne", Eb }, |
| 560 | { "setbe", Eb }, |
| 561 | { "seta", Eb }, |
| 562 | /* 98 */ |
| 563 | { "sets", Eb }, |
| 564 | { "setns", Eb }, |
| 565 | { "setp", Eb }, |
| 566 | { "setnp", Eb }, |
| 567 | { "setl", Eb }, |
| 568 | { "setge", Eb }, |
| 569 | { "setle", Eb }, |
| 570 | { "setg", Eb }, |
| 571 | /* a0 */ |
| 572 | { "pushl", fs }, |
| 573 | { "popl", fs }, |
| 574 | { "(bad)" }, |
| 575 | { "btS", Ev, Gv }, |
| 576 | { "shldS", Ev, Gv, Ib }, |
| 577 | { "shldS", Ev, Gv, CL }, |
| 578 | { "(bad)" }, |
| 579 | { "(bad)" }, |
| 580 | /* a8 */ |
| 581 | { "pushl", gs }, |
| 582 | { "popl", gs }, |
| 583 | { "(bad)" }, |
| 584 | { "btsS", Ev, Gv }, |
| 585 | { "shrdS", Ev, Gv, Ib }, |
| 586 | { "shrdS", Ev, Gv, CL }, |
| 587 | { "(bad)" }, |
| 588 | { "imulS", Gv, Ev }, |
| 589 | /* b0 */ |
| 590 | { "(bad)" }, |
| 591 | { "(bad)" }, |
| 592 | { "lssS", Gv, Mp }, /* 386 lists only Mp */ |
| 593 | { "btrS", Ev, Gv }, |
| 594 | { "lfsS", Gv, Mp }, /* 386 lists only Mp */ |
| 595 | { "lgsS", Gv, Mp }, /* 386 lists only Mp */ |
| 596 | { "movzbS", Gv, Eb }, |
| 597 | { "movzwS", Gv, Ew }, |
| 598 | /* b8 */ |
| 599 | { "(bad)" }, |
| 600 | { "(bad)" }, |
| 601 | { GRP8 }, |
| 602 | { "btcS", Ev, Gv }, |
| 603 | { "bsfS", Gv, Ev }, |
| 604 | { "bsrS", Gv, Ev }, |
| 605 | { "movsbS", Gv, Eb }, |
| 606 | { "movswS", Gv, Ew }, |
| 607 | /* c0 */ |
| 608 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 609 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 610 | /* c8 */ |
| 611 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 612 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 613 | /* d0 */ |
| 614 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 615 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 616 | /* d8 */ |
| 617 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 618 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 619 | /* e0 */ |
| 620 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 621 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 622 | /* e8 */ |
| 623 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 624 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 625 | /* f0 */ |
| 626 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 627 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 628 | /* f8 */ |
| 629 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 630 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
| 631 | }; |
| 632 | |
| 633 | static char obuf[100]; |
| 634 | static char *obufp; |
| 635 | static char scratchbuf[100]; |
| 636 | static unsigned char *start_codep; |
| 637 | static unsigned char *codep; |
| 638 | static int mod; |
| 639 | static int rm; |
| 640 | static int reg; |
| 641 | static void oappend (); |
| 642 | |
| 643 | static char *names32[]={ |
| 644 | "%eax","%ecx","%edx","%ebx", "%esp","%ebp","%esi","%edi", |
| 645 | }; |
| 646 | static char *names16[] = { |
| 647 | "%ax","%cx","%dx","%bx","%sp","%bp","%si","%di", |
| 648 | }; |
| 649 | static char *names8[] = { |
| 650 | "%al","%cl","%dl","%bl","%ah","%ch","%dh","%bh", |
| 651 | }; |
| 652 | static char *names_seg[] = { |
| 653 | "%es","%cs","%ss","%ds","%fs","%gs","%?","%?", |
| 654 | }; |
| 655 | |
| 656 | struct dis386 grps[][8] = { |
| 657 | /* GRP1b */ |
| 658 | { |
| 659 | { "addb", Eb, Ib }, |
| 660 | { "orb", Eb, Ib }, |
| 661 | { "adcb", Eb, Ib }, |
| 662 | { "sbbb", Eb, Ib }, |
| 663 | { "andb", Eb, Ib }, |
| 664 | { "subb", Eb, Ib }, |
| 665 | { "xorb", Eb, Ib }, |
| 666 | { "cmpb", Eb, Ib } |
| 667 | }, |
| 668 | /* GRP1S */ |
| 669 | { |
| 670 | { "addS", Ev, Iv }, |
| 671 | { "orS", Ev, Iv }, |
| 672 | { "adcS", Ev, Iv }, |
| 673 | { "sbbS", Ev, Iv }, |
| 674 | { "andS", Ev, Iv }, |
| 675 | { "subS", Ev, Iv }, |
| 676 | { "xorS", Ev, Iv }, |
| 677 | { "cmpS", Ev, Iv } |
| 678 | }, |
| 679 | /* GRP1Ss */ |
| 680 | { |
| 681 | { "addS", Ev, sIb }, |
| 682 | { "orS", Ev, sIb }, |
| 683 | { "adcS", Ev, sIb }, |
| 684 | { "sbbS", Ev, sIb }, |
| 685 | { "andS", Ev, sIb }, |
| 686 | { "subS", Ev, sIb }, |
| 687 | { "xorS", Ev, sIb }, |
| 688 | { "cmpS", Ev, sIb } |
| 689 | }, |
| 690 | /* GRP2b */ |
| 691 | { |
| 692 | { "rolb", Eb, Ib }, |
| 693 | { "rorb", Eb, Ib }, |
| 694 | { "rclb", Eb, Ib }, |
| 695 | { "rcrb", Eb, Ib }, |
| 696 | { "shlb", Eb, Ib }, |
| 697 | { "shrb", Eb, Ib }, |
| 698 | { "(bad)" }, |
| 699 | { "sarb", Eb, Ib }, |
| 700 | }, |
| 701 | /* GRP2S */ |
| 702 | { |
| 703 | { "rolS", Ev, Ib }, |
| 704 | { "rorS", Ev, Ib }, |
| 705 | { "rclS", Ev, Ib }, |
| 706 | { "rcrS", Ev, Ib }, |
| 707 | { "shlS", Ev, Ib }, |
| 708 | { "shrS", Ev, Ib }, |
| 709 | { "(bad)" }, |
| 710 | { "sarS", Ev, Ib }, |
| 711 | }, |
| 712 | /* GRP2b_one */ |
| 713 | { |
| 714 | { "rolb", Eb }, |
| 715 | { "rorb", Eb }, |
| 716 | { "rclb", Eb }, |
| 717 | { "rcrb", Eb }, |
| 718 | { "shlb", Eb }, |
| 719 | { "shrb", Eb }, |
| 720 | { "(bad)" }, |
| 721 | { "sarb", Eb }, |
| 722 | }, |
| 723 | /* GRP2S_one */ |
| 724 | { |
| 725 | { "rolS", Ev }, |
| 726 | { "rorS", Ev }, |
| 727 | { "rclS", Ev }, |
| 728 | { "rcrS", Ev }, |
| 729 | { "shlS", Ev }, |
| 730 | { "shrS", Ev }, |
| 731 | { "(bad)" }, |
| 732 | { "sarS", Ev }, |
| 733 | }, |
| 734 | /* GRP2b_cl */ |
| 735 | { |
| 736 | { "rolb", Eb, CL }, |
| 737 | { "rorb", Eb, CL }, |
| 738 | { "rclb", Eb, CL }, |
| 739 | { "rcrb", Eb, CL }, |
| 740 | { "shlb", Eb, CL }, |
| 741 | { "shrb", Eb, CL }, |
| 742 | { "(bad)" }, |
| 743 | { "sarb", Eb, CL }, |
| 744 | }, |
| 745 | /* GRP2S_cl */ |
| 746 | { |
| 747 | { "rolS", Ev, CL }, |
| 748 | { "rorS", Ev, CL }, |
| 749 | { "rclS", Ev, CL }, |
| 750 | { "rcrS", Ev, CL }, |
| 751 | { "shlS", Ev, CL }, |
| 752 | { "shrS", Ev, CL }, |
| 753 | { "(bad)" }, |
| 754 | { "sarS", Ev, CL } |
| 755 | }, |
| 756 | /* GRP3b */ |
| 757 | { |
| 758 | { "testb", Eb, Ib }, |
| 759 | { "(bad)", Eb }, |
| 760 | { "notb", Eb }, |
| 761 | { "negb", Eb }, |
| 762 | { "mulb", AL, Eb }, |
| 763 | { "imulb", AL, Eb }, |
| 764 | { "divb", AL, Eb }, |
| 765 | { "idivb", AL, Eb } |
| 766 | }, |
| 767 | /* GRP3S */ |
| 768 | { |
| 769 | { "testS", Ev, Iv }, |
| 770 | { "(bad)" }, |
| 771 | { "notS", Ev }, |
| 772 | { "negS", Ev }, |
| 773 | { "mulS", eAX, Ev }, |
| 774 | { "imulS", eAX, Ev }, |
| 775 | { "divS", eAX, Ev }, |
| 776 | { "idivS", eAX, Ev }, |
| 777 | }, |
| 778 | /* GRP4 */ |
| 779 | { |
| 780 | { "incb", Eb }, |
| 781 | { "decb", Eb }, |
| 782 | { "(bad)" }, |
| 783 | { "(bad)" }, |
| 784 | { "(bad)" }, |
| 785 | { "(bad)" }, |
| 786 | { "(bad)" }, |
| 787 | { "(bad)" }, |
| 788 | }, |
| 789 | /* GRP5 */ |
| 790 | { |
| 791 | { "incS", Ev }, |
| 792 | { "decS", Ev }, |
| 793 | { "call", indirEv }, |
| 794 | { "lcall", indirEv }, |
| 795 | { "jmp", indirEv }, |
| 796 | { "ljmp", indirEv }, |
| 797 | { "pushS", Ev }, |
| 798 | { "(bad)" }, |
| 799 | }, |
| 800 | /* GRP6 */ |
| 801 | { |
| 802 | { "sldt", Ew }, |
| 803 | { "str", Ew }, |
| 804 | { "lldt", Ew }, |
| 805 | { "ltr", Ew }, |
| 806 | { "verr", Ew }, |
| 807 | { "verw", Ew }, |
| 808 | { "(bad)" }, |
| 809 | { "(bad)" } |
| 810 | }, |
| 811 | /* GRP7 */ |
| 812 | { |
| 813 | { "sgdt", Ew }, |
| 814 | { "sidt", Ew }, |
| 815 | { "lgdt", Ew }, |
| 816 | { "lidt", Ew }, |
| 817 | { "smsw", Ew }, |
| 818 | { "(bad)" }, |
| 819 | { "lmsw", Ew }, |
| 820 | { "(bad)" }, |
| 821 | }, |
| 822 | /* GRP8 */ |
| 823 | { |
| 824 | { "(bad)" }, |
| 825 | { "(bad)" }, |
| 826 | { "(bad)" }, |
| 827 | { "(bad)" }, |
| 828 | { "btS", Ev, Ib }, |
| 829 | { "btsS", Ev, Ib }, |
| 830 | { "btrS", Ev, Ib }, |
| 831 | { "btcS", Ev, Ib }, |
| 832 | } |
| 833 | }; |
| 834 | |
| 835 | #define PREFIX_REPZ 1 |
| 836 | #define PREFIX_REPNZ 2 |
| 837 | #define PREFIX_LOCK 4 |
| 838 | #define PREFIX_CS 8 |
| 839 | #define PREFIX_SS 0x10 |
| 840 | #define PREFIX_DS 0x20 |
| 841 | #define PREFIX_ES 0x40 |
| 842 | #define PREFIX_FS 0x80 |
| 843 | #define PREFIX_GS 0x100 |
| 844 | #define PREFIX_DATA 0x200 |
| 845 | #define PREFIX_ADR 0x400 |
| 846 | #define PREFIX_FWAIT 0x800 |
| 847 | |
| 848 | static int prefixes; |
| 849 | |
| 850 | static void |
| 851 | ckprefix () |
| 852 | { |
| 853 | prefixes = 0; |
| 854 | while (1) |
| 855 | { |
| 856 | switch (*codep) |
| 857 | { |
| 858 | case 0xf3: |
| 859 | prefixes |= PREFIX_REPZ; |
| 860 | break; |
| 861 | case 0xf2: |
| 862 | prefixes |= PREFIX_REPNZ; |
| 863 | break; |
| 864 | case 0xf0: |
| 865 | prefixes |= PREFIX_LOCK; |
| 866 | break; |
| 867 | case 0x2e: |
| 868 | prefixes |= PREFIX_CS; |
| 869 | break; |
| 870 | case 0x36: |
| 871 | prefixes |= PREFIX_SS; |
| 872 | break; |
| 873 | case 0x3e: |
| 874 | prefixes |= PREFIX_DS; |
| 875 | break; |
| 876 | case 0x26: |
| 877 | prefixes |= PREFIX_ES; |
| 878 | break; |
| 879 | case 0x64: |
| 880 | prefixes |= PREFIX_FS; |
| 881 | break; |
| 882 | case 0x65: |
| 883 | prefixes |= PREFIX_GS; |
| 884 | break; |
| 885 | case 0x66: |
| 886 | prefixes |= PREFIX_DATA; |
| 887 | break; |
| 888 | case 0x67: |
| 889 | prefixes |= PREFIX_ADR; |
| 890 | break; |
| 891 | case 0x9b: |
| 892 | prefixes |= PREFIX_FWAIT; |
| 893 | break; |
| 894 | default: |
| 895 | return; |
| 896 | } |
| 897 | codep++; |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | static int dflag; |
| 902 | static int aflag; |
| 903 | |
| 904 | static char op1out[100], op2out[100], op3out[100]; |
| 905 | static int op_address[3], op_ad, op_index[3]; |
| 906 | static int start_pc; |
| 907 | extern void fputs_filtered (); |
| 908 | |
| 909 | /* |
| 910 | * disassemble the first instruction in 'inbuf'. You have to make |
| 911 | * sure all of the bytes of the instruction are filled in. |
| 912 | * On the 386's of 1988, the maximum length of an instruction is 15 bytes. |
| 913 | * (see topic "Redundant prefixes" in the "Differences from 8086" |
| 914 | * section of the "Virtual 8086 Mode" chapter.) |
| 915 | * 'pc' should be the address of this instruction, it will |
| 916 | * be used to print the target address if this is a relative jump or call |
| 917 | * 'outbuf' gets filled in with the disassembled instruction. it should |
| 918 | * be long enough to hold the longest disassembled instruction. |
| 919 | * 100 bytes is certainly enough, unless symbol printing is added later |
| 920 | * The function returns the length of this instruction in bytes. |
| 921 | */ |
| 922 | |
| 923 | int |
| 924 | i386dis (pc, inbuf, stream) |
| 925 | int pc; |
| 926 | unsigned char *inbuf; |
| 927 | FILE *stream; |
| 928 | { |
| 929 | struct dis386 *dp; |
| 930 | int i; |
| 931 | int enter_instruction; |
| 932 | char *first, *second, *third; |
| 933 | int needcomma; |
| 934 | |
| 935 | obuf[0] = 0; |
| 936 | op1out[0] = 0; |
| 937 | op2out[0] = 0; |
| 938 | op3out[0] = 0; |
| 939 | |
| 940 | op_index[0] = op_index[1] = op_index[2] = -1; |
| 941 | |
| 942 | start_pc = pc; |
| 943 | start_codep = inbuf; |
| 944 | codep = inbuf; |
| 945 | |
| 946 | ckprefix (); |
| 947 | |
| 948 | if (*codep == 0xc8) |
| 949 | enter_instruction = 1; |
| 950 | else |
| 951 | enter_instruction = 0; |
| 952 | |
| 953 | obufp = obuf; |
| 954 | |
| 955 | if (prefixes & PREFIX_REPZ) |
| 956 | oappend ("repz "); |
| 957 | if (prefixes & PREFIX_REPNZ) |
| 958 | oappend ("repnz "); |
| 959 | if (prefixes & PREFIX_LOCK) |
| 960 | oappend ("lock "); |
| 961 | |
| 962 | if ((prefixes & PREFIX_FWAIT) |
| 963 | && ((*codep < 0xd8) || (*codep > 0xdf))) |
| 964 | { |
| 965 | /* fwait not followed by floating point instruction */ |
| 966 | fputs_filtered ("fwait", stream); |
| 967 | return (1); |
| 968 | } |
| 969 | |
| 970 | /* these would be initialized to 0 if disassembling for 8086 or 286 */ |
| 971 | dflag = 1; |
| 972 | aflag = 1; |
| 973 | |
| 974 | if (prefixes & PREFIX_DATA) |
| 975 | dflag ^= 1; |
| 976 | |
| 977 | if (prefixes & PREFIX_ADR) |
| 978 | { |
| 979 | aflag ^= 1; |
| 980 | oappend ("addr16 "); |
| 981 | } |
| 982 | |
| 983 | if (*codep == 0x0f) |
| 984 | dp = &dis386_twobyte[*++codep]; |
| 985 | else |
| 986 | dp = &dis386[*codep]; |
| 987 | codep++; |
| 988 | mod = (*codep >> 6) & 3; |
| 989 | reg = (*codep >> 3) & 7; |
| 990 | rm = *codep & 7; |
| 991 | |
| 992 | if (dp->name == NULL && dp->bytemode1 == FLOATCODE) |
| 993 | { |
| 994 | dofloat (); |
| 995 | } |
| 996 | else |
| 997 | { |
| 998 | if (dp->name == NULL) |
| 999 | dp = &grps[dp->bytemode1][reg]; |
| 1000 | |
| 1001 | putop (dp->name); |
| 1002 | |
| 1003 | obufp = op1out; |
| 1004 | op_ad = 2; |
| 1005 | if (dp->op1) |
| 1006 | (*dp->op1)(dp->bytemode1); |
| 1007 | |
| 1008 | obufp = op2out; |
| 1009 | op_ad = 1; |
| 1010 | if (dp->op2) |
| 1011 | (*dp->op2)(dp->bytemode2); |
| 1012 | |
| 1013 | obufp = op3out; |
| 1014 | op_ad = 0; |
| 1015 | if (dp->op3) |
| 1016 | (*dp->op3)(dp->bytemode3); |
| 1017 | } |
| 1018 | |
| 1019 | obufp = obuf + strlen (obuf); |
| 1020 | for (i = strlen (obuf); i < 6; i++) |
| 1021 | oappend (" "); |
| 1022 | oappend (" "); |
| 1023 | fputs_filtered (obuf, stream); |
| 1024 | |
| 1025 | /* enter instruction is printed with operands in the |
| 1026 | * same order as the intel book; everything else |
| 1027 | * is printed in reverse order |
| 1028 | */ |
| 1029 | if (enter_instruction) |
| 1030 | { |
| 1031 | first = op1out; |
| 1032 | second = op2out; |
| 1033 | third = op3out; |
| 1034 | op_ad = op_index[0]; |
| 1035 | op_index[0] = op_index[2]; |
| 1036 | op_index[2] = op_ad; |
| 1037 | } |
| 1038 | else |
| 1039 | { |
| 1040 | first = op3out; |
| 1041 | second = op2out; |
| 1042 | third = op1out; |
| 1043 | } |
| 1044 | needcomma = 0; |
| 1045 | if (*first) |
| 1046 | { |
| 1047 | if (op_index[0] != -1) |
| 1048 | print_address (op_address[op_index[0]], stream); |
| 1049 | else |
| 1050 | fputs_filtered (first, stream); |
| 1051 | needcomma = 1; |
| 1052 | } |
| 1053 | if (*second) |
| 1054 | { |
| 1055 | if (needcomma) |
| 1056 | fputs_filtered (",", stream); |
| 1057 | if (op_index[1] != -1) |
| 1058 | print_address (op_address[op_index[1]], stream); |
| 1059 | else |
| 1060 | fputs_filtered (second, stream); |
| 1061 | needcomma = 1; |
| 1062 | } |
| 1063 | if (*third) |
| 1064 | { |
| 1065 | if (needcomma) |
| 1066 | fputs_filtered (",", stream); |
| 1067 | if (op_index[2] != -1) |
| 1068 | print_address (op_address[op_index[2]], stream); |
| 1069 | else |
| 1070 | fputs_filtered (third, stream); |
| 1071 | } |
| 1072 | return (codep - inbuf); |
| 1073 | } |
| 1074 | |
| 1075 | char *float_mem[] = { |
| 1076 | /* d8 */ |
| 1077 | "fadds", |
| 1078 | "fmuls", |
| 1079 | "fcoms", |
| 1080 | "fcomps", |
| 1081 | "fsubs", |
| 1082 | "fsubrs", |
| 1083 | "fdivs", |
| 1084 | "fdivrs", |
| 1085 | /* d9 */ |
| 1086 | "flds", |
| 1087 | "(bad)", |
| 1088 | "fsts", |
| 1089 | "fstps", |
| 1090 | "fldenv", |
| 1091 | "fldcw", |
| 1092 | "fNstenv", |
| 1093 | "fNstcw", |
| 1094 | /* da */ |
| 1095 | "fiaddl", |
| 1096 | "fimull", |
| 1097 | "ficoml", |
| 1098 | "ficompl", |
| 1099 | "fisubl", |
| 1100 | "fisubrl", |
| 1101 | "fidivl", |
| 1102 | "fidivrl", |
| 1103 | /* db */ |
| 1104 | "fildl", |
| 1105 | "(bad)", |
| 1106 | "fistl", |
| 1107 | "fistpl", |
| 1108 | "(bad)", |
| 1109 | "fldt", |
| 1110 | "(bad)", |
| 1111 | "fstpt", |
| 1112 | /* dc */ |
| 1113 | "faddl", |
| 1114 | "fmull", |
| 1115 | "fcoml", |
| 1116 | "fcompl", |
| 1117 | "fsubl", |
| 1118 | "fsubrl", |
| 1119 | "fdivl", |
| 1120 | "fdivrl", |
| 1121 | /* dd */ |
| 1122 | "fldl", |
| 1123 | "(bad)", |
| 1124 | "fstl", |
| 1125 | "fstpl", |
| 1126 | "frstor", |
| 1127 | "(bad)", |
| 1128 | "fNsave", |
| 1129 | "fNstsw", |
| 1130 | /* de */ |
| 1131 | "fiadd", |
| 1132 | "fimul", |
| 1133 | "ficom", |
| 1134 | "ficomp", |
| 1135 | "fisub", |
| 1136 | "fisubr", |
| 1137 | "fidiv", |
| 1138 | "fidivr", |
| 1139 | /* df */ |
| 1140 | "fild", |
| 1141 | "(bad)", |
| 1142 | "fist", |
| 1143 | "fistp", |
| 1144 | "fbld", |
| 1145 | "fildll", |
| 1146 | "fbstp", |
| 1147 | "fistpll", |
| 1148 | }; |
| 1149 | |
| 1150 | #define ST OP_ST, 0 |
| 1151 | #define STi OP_STi, 0 |
| 1152 | int OP_ST(), OP_STi(); |
| 1153 | |
| 1154 | #define FGRPd9_2 NULL, NULL, 0 |
| 1155 | #define FGRPd9_4 NULL, NULL, 1 |
| 1156 | #define FGRPd9_5 NULL, NULL, 2 |
| 1157 | #define FGRPd9_6 NULL, NULL, 3 |
| 1158 | #define FGRPd9_7 NULL, NULL, 4 |
| 1159 | #define FGRPda_5 NULL, NULL, 5 |
| 1160 | #define FGRPdb_4 NULL, NULL, 6 |
| 1161 | #define FGRPde_3 NULL, NULL, 7 |
| 1162 | #define FGRPdf_4 NULL, NULL, 8 |
| 1163 | |
| 1164 | struct dis386 float_reg[][8] = { |
| 1165 | /* d8 */ |
| 1166 | { |
| 1167 | { "fadd", ST, STi }, |
| 1168 | { "fmul", ST, STi }, |
| 1169 | { "fcom", STi }, |
| 1170 | { "fcomp", STi }, |
| 1171 | { "fsub", ST, STi }, |
| 1172 | { "fsubr", ST, STi }, |
| 1173 | { "fdiv", ST, STi }, |
| 1174 | { "fdivr", ST, STi }, |
| 1175 | }, |
| 1176 | /* d9 */ |
| 1177 | { |
| 1178 | { "fld", STi }, |
| 1179 | { "fxch", STi }, |
| 1180 | { FGRPd9_2 }, |
| 1181 | { "(bad)" }, |
| 1182 | { FGRPd9_4 }, |
| 1183 | { FGRPd9_5 }, |
| 1184 | { FGRPd9_6 }, |
| 1185 | { FGRPd9_7 }, |
| 1186 | }, |
| 1187 | /* da */ |
| 1188 | { |
| 1189 | { "(bad)" }, |
| 1190 | { "(bad)" }, |
| 1191 | { "(bad)" }, |
| 1192 | { "(bad)" }, |
| 1193 | { "(bad)" }, |
| 1194 | { FGRPda_5 }, |
| 1195 | { "(bad)" }, |
| 1196 | { "(bad)" }, |
| 1197 | }, |
| 1198 | /* db */ |
| 1199 | { |
| 1200 | { "(bad)" }, |
| 1201 | { "(bad)" }, |
| 1202 | { "(bad)" }, |
| 1203 | { "(bad)" }, |
| 1204 | { FGRPdb_4 }, |
| 1205 | { "(bad)" }, |
| 1206 | { "(bad)" }, |
| 1207 | { "(bad)" }, |
| 1208 | }, |
| 1209 | /* dc */ |
| 1210 | { |
| 1211 | { "fadd", STi, ST }, |
| 1212 | { "fmul", STi, ST }, |
| 1213 | { "(bad)" }, |
| 1214 | { "(bad)" }, |
| 1215 | { "fsub", STi, ST }, |
| 1216 | { "fsubr", STi, ST }, |
| 1217 | { "fdiv", STi, ST }, |
| 1218 | { "fdivr", STi, ST }, |
| 1219 | }, |
| 1220 | /* dd */ |
| 1221 | { |
| 1222 | { "ffree", STi }, |
| 1223 | { "(bad)" }, |
| 1224 | { "fst", STi }, |
| 1225 | { "fstp", STi }, |
| 1226 | { "fucom", STi }, |
| 1227 | { "fucomp", STi }, |
| 1228 | { "(bad)" }, |
| 1229 | { "(bad)" }, |
| 1230 | }, |
| 1231 | /* de */ |
| 1232 | { |
| 1233 | { "faddp", STi, ST }, |
| 1234 | { "fmulp", STi, ST }, |
| 1235 | { "(bad)" }, |
| 1236 | { FGRPde_3 }, |
| 1237 | { "fsubp", STi, ST }, |
| 1238 | { "fsubrp", STi, ST }, |
| 1239 | { "fdivp", STi, ST }, |
| 1240 | { "fdivrp", STi, ST }, |
| 1241 | }, |
| 1242 | /* df */ |
| 1243 | { |
| 1244 | { "(bad)" }, |
| 1245 | { "(bad)" }, |
| 1246 | { "(bad)" }, |
| 1247 | { "(bad)" }, |
| 1248 | { FGRPdf_4 }, |
| 1249 | { "(bad)" }, |
| 1250 | { "(bad)" }, |
| 1251 | { "(bad)" }, |
| 1252 | }, |
| 1253 | }; |
| 1254 | |
| 1255 | |
| 1256 | char *fgrps[][8] = { |
| 1257 | /* d9_2 0 */ |
| 1258 | { |
| 1259 | "fnop","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", |
| 1260 | }, |
| 1261 | |
| 1262 | /* d9_4 1 */ |
| 1263 | { |
| 1264 | "fchs","fabs","(bad)","(bad)","ftst","fxam","(bad)","(bad)", |
| 1265 | }, |
| 1266 | |
| 1267 | /* d9_5 2 */ |
| 1268 | { |
| 1269 | "fld1","fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","(bad)", |
| 1270 | }, |
| 1271 | |
| 1272 | /* d9_6 3 */ |
| 1273 | { |
| 1274 | "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp","fincstp", |
| 1275 | }, |
| 1276 | |
| 1277 | /* d9_7 4 */ |
| 1278 | { |
| 1279 | "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos", |
| 1280 | }, |
| 1281 | |
| 1282 | /* da_5 5 */ |
| 1283 | { |
| 1284 | "(bad)","fucompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", |
| 1285 | }, |
| 1286 | |
| 1287 | /* db_4 6 */ |
| 1288 | { |
| 1289 | "feni(287 only)","fdisi(287 only)","fNclex","fNinit", |
| 1290 | "fNsetpm(287 only)","(bad)","(bad)","(bad)", |
| 1291 | }, |
| 1292 | |
| 1293 | /* de_3 7 */ |
| 1294 | { |
| 1295 | "(bad)","fcompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", |
| 1296 | }, |
| 1297 | |
| 1298 | /* df_4 8 */ |
| 1299 | { |
| 1300 | "fNstsw","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", |
| 1301 | }, |
| 1302 | }; |
| 1303 | |
| 1304 | static void |
| 1305 | dofloat () |
| 1306 | { |
| 1307 | struct dis386 *dp; |
| 1308 | unsigned char floatop; |
| 1309 | |
| 1310 | floatop = codep[-1]; |
| 1311 | |
| 1312 | if (mod != 3) |
| 1313 | { |
| 1314 | putop (float_mem[(floatop - 0xd8) * 8 + reg]); |
| 1315 | obufp = op1out; |
| 1316 | OP_E (v_mode); |
| 1317 | return; |
| 1318 | } |
| 1319 | codep++; |
| 1320 | |
| 1321 | dp = &float_reg[floatop - 0xd8][reg]; |
| 1322 | if (dp->name == NULL) |
| 1323 | { |
| 1324 | putop (fgrps[dp->bytemode1][rm]); |
| 1325 | /* instruction fnstsw is only one with strange arg */ |
| 1326 | if (floatop == 0xdf && *codep == 0xe0) |
| 1327 | strcpy (op1out, "%eax"); |
| 1328 | } |
| 1329 | else |
| 1330 | { |
| 1331 | putop (dp->name); |
| 1332 | obufp = op1out; |
| 1333 | if (dp->op1) |
| 1334 | (*dp->op1)(dp->bytemode1); |
| 1335 | obufp = op2out; |
| 1336 | if (dp->op2) |
| 1337 | (*dp->op2)(dp->bytemode2); |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | /* ARGSUSED */ |
| 1342 | int |
| 1343 | OP_ST (ignore) |
| 1344 | int ignore; |
| 1345 | { |
| 1346 | oappend ("%st"); |
| 1347 | return (0); |
| 1348 | } |
| 1349 | |
| 1350 | /* ARGSUSED */ |
| 1351 | int |
| 1352 | OP_STi (ignore) |
| 1353 | int ignore; |
| 1354 | { |
| 1355 | sprintf (scratchbuf, "%%st(%d)", rm); |
| 1356 | oappend (scratchbuf); |
| 1357 | return (0); |
| 1358 | } |
| 1359 | |
| 1360 | |
| 1361 | /* capital letters in template are macros */ |
| 1362 | static void |
| 1363 | putop (template) |
| 1364 | char *template; |
| 1365 | { |
| 1366 | char *p; |
| 1367 | |
| 1368 | for (p = template; *p; p++) |
| 1369 | { |
| 1370 | switch (*p) |
| 1371 | { |
| 1372 | default: |
| 1373 | *obufp++ = *p; |
| 1374 | break; |
| 1375 | case 'C': /* For jcxz/jecxz */ |
| 1376 | if (aflag == 0) |
| 1377 | *obufp++ = 'e'; |
| 1378 | break; |
| 1379 | case 'N': |
| 1380 | if ((prefixes & PREFIX_FWAIT) == 0) |
| 1381 | *obufp++ = 'n'; |
| 1382 | break; |
| 1383 | case 'S': |
| 1384 | /* operand size flag */ |
| 1385 | if (dflag) |
| 1386 | *obufp++ = 'l'; |
| 1387 | else |
| 1388 | *obufp++ = 'w'; |
| 1389 | break; |
| 1390 | } |
| 1391 | } |
| 1392 | *obufp = 0; |
| 1393 | } |
| 1394 | |
| 1395 | static void |
| 1396 | oappend (s) |
| 1397 | char *s; |
| 1398 | { |
| 1399 | strcpy (obufp, s); |
| 1400 | obufp += strlen (s); |
| 1401 | *obufp = 0; |
| 1402 | } |
| 1403 | |
| 1404 | static void |
| 1405 | append_prefix () |
| 1406 | { |
| 1407 | if (prefixes & PREFIX_CS) |
| 1408 | oappend ("%cs:"); |
| 1409 | if (prefixes & PREFIX_DS) |
| 1410 | oappend ("%ds:"); |
| 1411 | if (prefixes & PREFIX_SS) |
| 1412 | oappend ("%ss:"); |
| 1413 | if (prefixes & PREFIX_ES) |
| 1414 | oappend ("%es:"); |
| 1415 | if (prefixes & PREFIX_FS) |
| 1416 | oappend ("%fs:"); |
| 1417 | if (prefixes & PREFIX_GS) |
| 1418 | oappend ("%gs:"); |
| 1419 | } |
| 1420 | |
| 1421 | int |
| 1422 | OP_indirE (bytemode) |
| 1423 | int bytemode; |
| 1424 | { |
| 1425 | oappend ("*"); |
| 1426 | OP_E (bytemode); |
| 1427 | return (0); |
| 1428 | } |
| 1429 | |
| 1430 | int |
| 1431 | OP_E (bytemode) |
| 1432 | int bytemode; |
| 1433 | { |
| 1434 | int disp; |
| 1435 | int havesib; |
| 1436 | int base; |
| 1437 | int index; |
| 1438 | int scale; |
| 1439 | int havebase; |
| 1440 | |
| 1441 | /* skip mod/rm byte */ |
| 1442 | codep++; |
| 1443 | |
| 1444 | havesib = 0; |
| 1445 | havebase = 0; |
| 1446 | disp = 0; |
| 1447 | |
| 1448 | if (mod == 3) |
| 1449 | { |
| 1450 | switch (bytemode) |
| 1451 | { |
| 1452 | case b_mode: |
| 1453 | oappend (names8[rm]); |
| 1454 | break; |
| 1455 | case w_mode: |
| 1456 | oappend (names16[rm]); |
| 1457 | break; |
| 1458 | case v_mode: |
| 1459 | if (dflag) |
| 1460 | oappend (names32[rm]); |
| 1461 | else |
| 1462 | oappend (names16[rm]); |
| 1463 | break; |
| 1464 | default: |
| 1465 | oappend ("<bad dis table>"); |
| 1466 | break; |
| 1467 | } |
| 1468 | return (0); |
| 1469 | } |
| 1470 | |
| 1471 | append_prefix (); |
| 1472 | if (rm == 4) |
| 1473 | { |
| 1474 | havesib = 1; |
| 1475 | havebase = 1; |
| 1476 | scale = (*codep >> 6) & 3; |
| 1477 | index = (*codep >> 3) & 7; |
| 1478 | base = *codep & 7; |
| 1479 | codep++; |
| 1480 | } |
| 1481 | |
| 1482 | switch (mod) |
| 1483 | { |
| 1484 | case 0: |
| 1485 | switch (rm) |
| 1486 | { |
| 1487 | case 4: |
| 1488 | /* implies havesib and havebase */ |
| 1489 | if (base == 5) { |
| 1490 | havebase = 0; |
| 1491 | disp = get32 (); |
| 1492 | } |
| 1493 | break; |
| 1494 | case 5: |
| 1495 | disp = get32 (); |
| 1496 | break; |
| 1497 | default: |
| 1498 | havebase = 1; |
| 1499 | base = rm; |
| 1500 | break; |
| 1501 | } |
| 1502 | break; |
| 1503 | case 1: |
| 1504 | disp = *(char *)codep++; |
| 1505 | if (rm != 4) |
| 1506 | { |
| 1507 | havebase = 1; |
| 1508 | base = rm; |
| 1509 | } |
| 1510 | break; |
| 1511 | case 2: |
| 1512 | disp = get32 (); |
| 1513 | if (rm != 4) |
| 1514 | { |
| 1515 | havebase = 1; |
| 1516 | base = rm; |
| 1517 | } |
| 1518 | break; |
| 1519 | } |
| 1520 | |
| 1521 | if (mod != 0 || rm == 5 || (havesib && base == 5)) |
| 1522 | { |
| 1523 | sprintf (scratchbuf, "0x%x", disp); |
| 1524 | oappend (scratchbuf); |
| 1525 | } |
| 1526 | |
| 1527 | if (havebase || havesib) |
| 1528 | { |
| 1529 | oappend ("("); |
| 1530 | if (havebase) |
| 1531 | oappend (names32[base]); |
| 1532 | if (havesib) |
| 1533 | { |
| 1534 | if (index != 4) |
| 1535 | { |
| 1536 | sprintf (scratchbuf, ",%s", names32[index]); |
| 1537 | oappend (scratchbuf); |
| 1538 | } |
| 1539 | sprintf (scratchbuf, ",%d", 1 << scale); |
| 1540 | oappend (scratchbuf); |
| 1541 | } |
| 1542 | oappend (")"); |
| 1543 | } |
| 1544 | return (0); |
| 1545 | } |
| 1546 | |
| 1547 | int |
| 1548 | OP_G (bytemode) |
| 1549 | int bytemode; |
| 1550 | { |
| 1551 | switch (bytemode) |
| 1552 | { |
| 1553 | case b_mode: |
| 1554 | oappend (names8[reg]); |
| 1555 | break; |
| 1556 | case w_mode: |
| 1557 | oappend (names16[reg]); |
| 1558 | break; |
| 1559 | case d_mode: |
| 1560 | oappend (names32[reg]); |
| 1561 | break; |
| 1562 | case v_mode: |
| 1563 | if (dflag) |
| 1564 | oappend (names32[reg]); |
| 1565 | else |
| 1566 | oappend (names16[reg]); |
| 1567 | break; |
| 1568 | default: |
| 1569 | oappend ("<internal disassembler error>"); |
| 1570 | break; |
| 1571 | } |
| 1572 | return (0); |
| 1573 | } |
| 1574 | |
| 1575 | static int |
| 1576 | get32 () |
| 1577 | { |
| 1578 | int x = 0; |
| 1579 | |
| 1580 | x = *codep++ & 0xff; |
| 1581 | x |= (*codep++ & 0xff) << 8; |
| 1582 | x |= (*codep++ & 0xff) << 16; |
| 1583 | x |= (*codep++ & 0xff) << 24; |
| 1584 | return (x); |
| 1585 | } |
| 1586 | |
| 1587 | static int |
| 1588 | get16 () |
| 1589 | { |
| 1590 | int x = 0; |
| 1591 | |
| 1592 | x = *codep++ & 0xff; |
| 1593 | x |= (*codep++ & 0xff) << 8; |
| 1594 | return (x); |
| 1595 | } |
| 1596 | |
| 1597 | static void |
| 1598 | set_op (op) |
| 1599 | int op; |
| 1600 | { |
| 1601 | op_index[op_ad] = op_ad; |
| 1602 | op_address[op_ad] = op; |
| 1603 | } |
| 1604 | |
| 1605 | int |
| 1606 | OP_REG (code) |
| 1607 | int code; |
| 1608 | { |
| 1609 | char *s; |
| 1610 | |
| 1611 | switch (code) |
| 1612 | { |
| 1613 | case indir_dx_reg: s = "(%dx)"; break; |
| 1614 | case ax_reg: case cx_reg: case dx_reg: case bx_reg: |
| 1615 | case sp_reg: case bp_reg: case si_reg: case di_reg: |
| 1616 | s = names16[code - ax_reg]; |
| 1617 | break; |
| 1618 | case es_reg: case ss_reg: case cs_reg: |
| 1619 | case ds_reg: case fs_reg: case gs_reg: |
| 1620 | s = names_seg[code - es_reg]; |
| 1621 | break; |
| 1622 | case al_reg: case ah_reg: case cl_reg: case ch_reg: |
| 1623 | case dl_reg: case dh_reg: case bl_reg: case bh_reg: |
| 1624 | s = names8[code - al_reg]; |
| 1625 | break; |
| 1626 | case eAX_reg: case eCX_reg: case eDX_reg: case eBX_reg: |
| 1627 | case eSP_reg: case eBP_reg: case eSI_reg: case eDI_reg: |
| 1628 | if (dflag) |
| 1629 | s = names32[code - eAX_reg]; |
| 1630 | else |
| 1631 | s = names16[code - eAX_reg]; |
| 1632 | break; |
| 1633 | default: |
| 1634 | s = "<internal disassembler error>"; |
| 1635 | break; |
| 1636 | } |
| 1637 | oappend (s); |
| 1638 | return (0); |
| 1639 | } |
| 1640 | |
| 1641 | int |
| 1642 | OP_I (bytemode) |
| 1643 | int bytemode; |
| 1644 | { |
| 1645 | int op; |
| 1646 | |
| 1647 | switch (bytemode) |
| 1648 | { |
| 1649 | case b_mode: |
| 1650 | op = *codep++ & 0xff; |
| 1651 | break; |
| 1652 | case v_mode: |
| 1653 | if (dflag) |
| 1654 | op = get32 (); |
| 1655 | else |
| 1656 | op = get16 (); |
| 1657 | break; |
| 1658 | case w_mode: |
| 1659 | op = get16 (); |
| 1660 | break; |
| 1661 | default: |
| 1662 | oappend ("<internal disassembler error>"); |
| 1663 | return (0); |
| 1664 | } |
| 1665 | sprintf (scratchbuf, "$0x%x", op); |
| 1666 | oappend (scratchbuf); |
| 1667 | return (0); |
| 1668 | } |
| 1669 | |
| 1670 | int |
| 1671 | OP_sI (bytemode) |
| 1672 | int bytemode; |
| 1673 | { |
| 1674 | int op; |
| 1675 | |
| 1676 | switch (bytemode) |
| 1677 | { |
| 1678 | case b_mode: |
| 1679 | op = *(char *)codep++; |
| 1680 | break; |
| 1681 | case v_mode: |
| 1682 | if (dflag) |
| 1683 | op = get32 (); |
| 1684 | else |
| 1685 | op = (short)get16(); |
| 1686 | break; |
| 1687 | case w_mode: |
| 1688 | op = (short)get16 (); |
| 1689 | break; |
| 1690 | default: |
| 1691 | oappend ("<internal disassembler error>"); |
| 1692 | return (0); |
| 1693 | } |
| 1694 | sprintf (scratchbuf, "$0x%x", op); |
| 1695 | oappend (scratchbuf); |
| 1696 | return (0); |
| 1697 | } |
| 1698 | |
| 1699 | int |
| 1700 | OP_J (bytemode) |
| 1701 | int bytemode; |
| 1702 | { |
| 1703 | int disp; |
| 1704 | int mask = -1; |
| 1705 | |
| 1706 | switch (bytemode) |
| 1707 | { |
| 1708 | case b_mode: |
| 1709 | disp = *(char *)codep++; |
| 1710 | break; |
| 1711 | case v_mode: |
| 1712 | if (dflag) |
| 1713 | disp = get32 (); |
| 1714 | else |
| 1715 | { |
| 1716 | disp = (short)get16 (); |
| 1717 | /* for some reason, a data16 prefix on a jump instruction |
| 1718 | means that the pc is masked to 16 bits after the |
| 1719 | displacement is added! */ |
| 1720 | mask = 0xffff; |
| 1721 | } |
| 1722 | break; |
| 1723 | default: |
| 1724 | oappend ("<internal disassembler error>"); |
| 1725 | return (0); |
| 1726 | } |
| 1727 | disp = (start_pc + codep - start_codep + disp) & mask; |
| 1728 | set_op (disp); |
| 1729 | sprintf (scratchbuf, "0x%x", disp); |
| 1730 | oappend (scratchbuf); |
| 1731 | return (0); |
| 1732 | } |
| 1733 | |
| 1734 | /* ARGSUSED */ |
| 1735 | int |
| 1736 | OP_SEG (dummy) |
| 1737 | int dummy; |
| 1738 | { |
| 1739 | static char *sreg[] = { |
| 1740 | "%es","%cs","%ss","%ds","%fs","%gs","%?","%?", |
| 1741 | }; |
| 1742 | |
| 1743 | oappend (sreg[reg]); |
| 1744 | return (0); |
| 1745 | } |
| 1746 | |
| 1747 | int |
| 1748 | OP_DIR (size) |
| 1749 | int size; |
| 1750 | { |
| 1751 | int seg, offset; |
| 1752 | |
| 1753 | switch (size) |
| 1754 | { |
| 1755 | case lptr: |
| 1756 | if (aflag) |
| 1757 | { |
| 1758 | offset = get32 (); |
| 1759 | seg = get16 (); |
| 1760 | } |
| 1761 | else |
| 1762 | { |
| 1763 | offset = get16 (); |
| 1764 | seg = get16 (); |
| 1765 | } |
| 1766 | sprintf (scratchbuf, "0x%x,0x%x", seg, offset); |
| 1767 | oappend (scratchbuf); |
| 1768 | break; |
| 1769 | case v_mode: |
| 1770 | if (aflag) |
| 1771 | offset = get32 (); |
| 1772 | else |
| 1773 | offset = (short)get16 (); |
| 1774 | |
| 1775 | offset = start_pc + codep - start_codep + offset; |
| 1776 | set_op (offset); |
| 1777 | sprintf (scratchbuf, "0x%x", offset); |
| 1778 | oappend (scratchbuf); |
| 1779 | break; |
| 1780 | default: |
| 1781 | oappend ("<internal disassembler error>"); |
| 1782 | break; |
| 1783 | } |
| 1784 | return (0); |
| 1785 | } |
| 1786 | |
| 1787 | /* ARGSUSED */ |
| 1788 | int |
| 1789 | OP_OFF (bytemode) |
| 1790 | int bytemode; |
| 1791 | { |
| 1792 | int off; |
| 1793 | |
| 1794 | if (aflag) |
| 1795 | off = get32 (); |
| 1796 | else |
| 1797 | off = get16 (); |
| 1798 | |
| 1799 | sprintf (scratchbuf, "0x%x", off); |
| 1800 | oappend (scratchbuf); |
| 1801 | return (0); |
| 1802 | } |
| 1803 | |
| 1804 | /* ARGSUSED */ |
| 1805 | int |
| 1806 | OP_ESDI (dummy) |
| 1807 | int dummy; |
| 1808 | { |
| 1809 | oappend ("%es:("); |
| 1810 | oappend (aflag ? "%edi" : "%di"); |
| 1811 | oappend (")"); |
| 1812 | return (0); |
| 1813 | } |
| 1814 | |
| 1815 | /* ARGSUSED */ |
| 1816 | int |
| 1817 | OP_DSSI (dummy) |
| 1818 | int dummy; |
| 1819 | { |
| 1820 | oappend ("%ds:("); |
| 1821 | oappend (aflag ? "%esi" : "%si"); |
| 1822 | oappend (")"); |
| 1823 | return (0); |
| 1824 | } |
| 1825 | |
| 1826 | /* ARGSUSED */ |
| 1827 | int |
| 1828 | OP_ONE (dummy) |
| 1829 | int dummy; |
| 1830 | { |
| 1831 | oappend ("1"); |
| 1832 | return (0); |
| 1833 | } |
| 1834 | |
| 1835 | /* ARGSUSED */ |
| 1836 | int |
| 1837 | OP_C (dummy) |
| 1838 | int dummy; |
| 1839 | { |
| 1840 | codep++; /* skip mod/rm */ |
| 1841 | sprintf (scratchbuf, "%%cr%d", reg); |
| 1842 | oappend (scratchbuf); |
| 1843 | return (0); |
| 1844 | } |
| 1845 | |
| 1846 | /* ARGSUSED */ |
| 1847 | int |
| 1848 | OP_D (dummy) |
| 1849 | int dummy; |
| 1850 | { |
| 1851 | codep++; /* skip mod/rm */ |
| 1852 | sprintf (scratchbuf, "%%db%d", reg); |
| 1853 | oappend (scratchbuf); |
| 1854 | return (0); |
| 1855 | } |
| 1856 | |
| 1857 | /* ARGSUSED */ |
| 1858 | int |
| 1859 | OP_T (dummy) |
| 1860 | int dummy; |
| 1861 | { |
| 1862 | codep++; /* skip mod/rm */ |
| 1863 | sprintf (scratchbuf, "%%tr%d", reg); |
| 1864 | oappend (scratchbuf); |
| 1865 | return (0); |
| 1866 | } |
| 1867 | |
| 1868 | int |
| 1869 | OP_rm (bytemode) |
| 1870 | int bytemode; |
| 1871 | { |
| 1872 | switch (bytemode) |
| 1873 | { |
| 1874 | case d_mode: |
| 1875 | oappend (names32[rm]); |
| 1876 | break; |
| 1877 | case w_mode: |
| 1878 | oappend (names16[rm]); |
| 1879 | break; |
| 1880 | } |
| 1881 | return (0); |
| 1882 | } |
| 1883 | |
| 1884 | #define MAXLEN 20 |
| 1885 | |
| 1886 | int |
| 1887 | print_insn (memaddr, stream) |
| 1888 | CORE_ADDR memaddr; |
| 1889 | FILE *stream; |
| 1890 | { |
| 1891 | unsigned char buffer[MAXLEN]; |
| 1892 | |
| 1893 | read_memory (memaddr, (char *) buffer, MAXLEN); |
| 1894 | |
| 1895 | return (i386dis ((int)memaddr, buffer, stream)); |
| 1896 | } |
| 1897 | |