1 /*- 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * Instruction disassembler. 32 */ 33 #include <sys/param.h> 34 35 #include <ddb/ddb.h> 36 #include <ddb/db_access.h> 37 #include <ddb/db_sym.h> 38 39 /* 40 * Size attributes 41 */ 42 #define BYTE 0 43 #define WORD 1 44 #define LONG 2 45 #define QUAD 3 46 #define SNGL 4 47 #define DBLR 5 48 #define EXTR 6 49 #define SDEP 7 50 #define NONE 8 51 52 /* 53 * Addressing modes 54 */ 55 #define E 1 /* general effective address */ 56 #define Eind 2 /* indirect address (jump, call) */ 57 #define Ew 3 /* address, word size */ 58 #define Eb 4 /* address, byte size */ 59 #define R 5 /* register, in 'reg' field */ 60 #define Rw 6 /* word register, in 'reg' field */ 61 #define Ri 7 /* register in instruction */ 62 #define S 8 /* segment reg, in 'reg' field */ 63 #define Si 9 /* segment reg, in instruction */ 64 #define A 10 /* accumulator */ 65 #define BX 11 /* (bx) */ 66 #define CL 12 /* cl, for shifts */ 67 #define DX 13 /* dx, for IO */ 68 #define SI 14 /* si */ 69 #define DI 15 /* di */ 70 #define CR 16 /* control register */ 71 #define DR 17 /* debug register */ 72 #define TR 18 /* test register */ 73 #define I 19 /* immediate, unsigned */ 74 #define Is 20 /* immediate, signed */ 75 #define Ib 21 /* byte immediate, unsigned */ 76 #define Ibs 22 /* byte immediate, signed */ 77 #define Iw 23 /* word immediate, unsigned */ 78 #define O 25 /* direct address */ 79 #define Db 26 /* byte displacement from EIP */ 80 #define Dl 27 /* long displacement from EIP */ 81 #define o1 28 /* constant 1 */ 82 #define o3 29 /* constant 3 */ 83 #define OS 30 /* immediate offset/segment */ 84 #define ST 31 /* FP stack top */ 85 #define STI 32 /* FP stack */ 86 #define X 33 /* extended FP op */ 87 #define XA 34 /* for 'fstcw %ax' */ 88 #define El 35 /* address, long size */ 89 #define Ril 36 /* long register in instruction */ 90 #define Iba 37 /* byte immediate, don't print if 0xa */ 91 92 struct inst { 93 const char * i_name; /* name */ 94 short i_has_modrm; /* has regmodrm byte */ 95 short i_size; /* operand size */ 96 int i_mode; /* addressing modes */ 97 const void * i_extra; /* pointer to extra opcode table */ 98 }; 99 100 #define op1(x) (x) 101 #define op2(x,y) ((x)|((y)<<8)) 102 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 103 104 struct finst { 105 const char * f_name; /* name for memory instruction */ 106 int f_size; /* size for memory instruction */ 107 int f_rrmode; /* mode for rr instruction */ 108 const void * f_rrname; /* name for rr instruction 109 (or pointer to table) */ 110 }; 111 112 static const char * const db_Grp6[] = { 113 "sldt", 114 "str", 115 "lldt", 116 "ltr", 117 "verr", 118 "verw", 119 "", 120 "" 121 }; 122 123 static const char * const db_Grp7[] = { 124 "sgdt", 125 "sidt", 126 "lgdt", 127 "lidt", 128 "smsw", 129 "", 130 "lmsw", 131 "invlpg" 132 }; 133 134 static const char * const db_Grp8[] = { 135 "", 136 "", 137 "", 138 "", 139 "bt", 140 "bts", 141 "btr", 142 "btc" 143 }; 144 145 static const char * const db_Grp9[] = { 146 "", 147 "cmpxchg8b", 148 "", 149 "", 150 "", 151 "", 152 "", 153 "" 154 }; 155 156 static const struct inst db_inst_0f0x[] = { 157 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 }, 158 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 }, 159 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, 160 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, 161 /*04*/ { "", FALSE, NONE, 0, 0 }, 162 /*05*/ { "", FALSE, NONE, 0, 0 }, 163 /*06*/ { "clts", FALSE, NONE, 0, 0 }, 164 /*07*/ { "", FALSE, NONE, 0, 0 }, 165 166 /*08*/ { "invd", FALSE, NONE, 0, 0 }, 167 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, 168 /*0a*/ { "", FALSE, NONE, 0, 0 }, 169 /*0b*/ { "", FALSE, NONE, 0, 0 }, 170 /*0c*/ { "", FALSE, NONE, 0, 0 }, 171 /*0d*/ { "", FALSE, NONE, 0, 0 }, 172 /*0e*/ { "", FALSE, NONE, 0, 0 }, 173 /*0f*/ { "", FALSE, NONE, 0, 0 }, 174 }; 175 176 static const struct inst db_inst_0f2x[] = { 177 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 }, 178 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 }, 179 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 }, 180 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 }, 181 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 }, 182 /*25*/ { "", FALSE, NONE, 0, 0 }, 183 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 }, 184 /*27*/ { "", FALSE, NONE, 0, 0 }, 185 186 /*28*/ { "", FALSE, NONE, 0, 0 }, 187 /*29*/ { "", FALSE, NONE, 0, 0 }, 188 /*2a*/ { "", FALSE, NONE, 0, 0 }, 189 /*2b*/ { "", FALSE, NONE, 0, 0 }, 190 /*2c*/ { "", FALSE, NONE, 0, 0 }, 191 /*2d*/ { "", FALSE, NONE, 0, 0 }, 192 /*2e*/ { "", FALSE, NONE, 0, 0 }, 193 /*2f*/ { "", FALSE, NONE, 0, 0 }, 194 }; 195 196 static const struct inst db_inst_0f3x[] = { 197 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 }, 198 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 }, 199 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 }, 200 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 }, 201 /*34*/ { "", FALSE, NONE, 0, 0 }, 202 /*35*/ { "", FALSE, NONE, 0, 0 }, 203 /*36*/ { "", FALSE, NONE, 0, 0 }, 204 /*37*/ { "", FALSE, NONE, 0, 0 }, 205 206 /*38*/ { "", FALSE, NONE, 0, 0 }, 207 /*39*/ { "", FALSE, NONE, 0, 0 }, 208 /*3a*/ { "", FALSE, NONE, 0, 0 }, 209 /*3b*/ { "", FALSE, NONE, 0, 0 }, 210 /*3c*/ { "", FALSE, NONE, 0, 0 }, 211 /*3d*/ { "", FALSE, NONE, 0, 0 }, 212 /*3e*/ { "", FALSE, NONE, 0, 0 }, 213 /*3f*/ { "", FALSE, NONE, 0, 0 }, 214 }; 215 216 static const struct inst db_inst_0f8x[] = { 217 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, 218 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, 219 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, 220 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, 221 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, 222 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, 223 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, 224 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, 225 226 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, 227 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, 228 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, 229 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, 230 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, 231 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, 232 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, 233 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, 234 }; 235 236 static const struct inst db_inst_0f9x[] = { 237 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, 238 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, 239 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, 240 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, 241 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, 242 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, 243 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, 244 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, 245 246 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, 247 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, 248 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, 249 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, 250 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, 251 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, 252 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, 253 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, 254 }; 255 256 static const struct inst db_inst_0fax[] = { 257 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, 258 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, 259 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, 260 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 }, 261 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 }, 262 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 }, 263 /*a6*/ { "", FALSE, NONE, 0, 0 }, 264 /*a7*/ { "", FALSE, NONE, 0, 0 }, 265 266 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, 267 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, 268 /*aa*/ { "rsm", FALSE, NONE, 0, 0 }, 269 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 }, 270 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 }, 271 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 }, 272 /*a6*/ { "", FALSE, NONE, 0, 0 }, 273 /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 }, 274 }; 275 276 static const struct inst db_inst_0fbx[] = { 277 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, 278 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, 279 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, 280 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 }, 281 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, 282 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, 283 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 }, 284 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 }, 285 286 /*b8*/ { "", FALSE, NONE, 0, 0 }, 287 /*b9*/ { "", FALSE, NONE, 0, 0 }, 288 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 }, 289 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, 290 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, 291 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, 292 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 }, 293 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 }, 294 }; 295 296 static const struct inst db_inst_0fcx[] = { 297 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, 298 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, 299 /*c2*/ { "", FALSE, NONE, 0, 0 }, 300 /*c3*/ { "", FALSE, NONE, 0, 0 }, 301 /*c4*/ { "", FALSE, NONE, 0, 0 }, 302 /*c5*/ { "", FALSE, NONE, 0, 0 }, 303 /*c6*/ { "", FALSE, NONE, 0, 0 }, 304 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 }, 305 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 306 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 307 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 308 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 309 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 310 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 311 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 312 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 313 }; 314 315 static const struct inst * const db_inst_0f[] = { 316 db_inst_0f0x, 317 0, 318 db_inst_0f2x, 319 db_inst_0f3x, 320 0, 321 0, 322 0, 323 0, 324 db_inst_0f8x, 325 db_inst_0f9x, 326 db_inst_0fax, 327 db_inst_0fbx, 328 db_inst_0fcx, 329 0, 330 0, 331 0 332 }; 333 334 static const char * const db_Esc92[] = { 335 "fnop", "", "", "", "", "", "", "" 336 }; 337 static const char * const db_Esc94[] = { 338 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 339 }; 340 static const char * const db_Esc95[] = { 341 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 342 }; 343 static const char * const db_Esc96[] = { 344 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 345 "fincstp" 346 }; 347 static const char * const db_Esc97[] = { 348 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 349 }; 350 351 static const char * const db_Esca5[] = { 352 "", "fucompp","", "", "", "", "", "" 353 }; 354 355 static const char * const db_Escb4[] = { 356 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", "" 357 }; 358 359 static const char * const db_Esce3[] = { 360 "", "fcompp","", "", "", "", "", "" 361 }; 362 363 static const char * const db_Escf4[] = { 364 "fnstsw","", "", "", "", "", "", "" 365 }; 366 367 static const struct finst db_Esc8[] = { 368 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 369 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 370 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 371 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 372 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 373 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 374 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 375 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 376 }; 377 378 static const struct finst db_Esc9[] = { 379 /*0*/ { "fld", SNGL, op1(STI), 0 }, 380 /*1*/ { "", NONE, op1(STI), "fxch" }, 381 /*2*/ { "fst", SNGL, op1(X), db_Esc92 }, 382 /*3*/ { "fstp", SNGL, 0, 0 }, 383 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, 384 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, 385 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, 386 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, 387 }; 388 389 static const struct finst db_Esca[] = { 390 /*0*/ { "fiadd", LONG, 0, 0 }, 391 /*1*/ { "fimul", LONG, 0, 0 }, 392 /*2*/ { "ficom", LONG, 0, 0 }, 393 /*3*/ { "ficomp", LONG, 0, 0 }, 394 /*4*/ { "fisub", LONG, 0, 0 }, 395 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 }, 396 /*6*/ { "fidiv", LONG, 0, 0 }, 397 /*7*/ { "fidivr", LONG, 0, 0 } 398 }; 399 400 static const struct finst db_Escb[] = { 401 /*0*/ { "fild", LONG, 0, 0 }, 402 /*1*/ { "", NONE, 0, 0 }, 403 /*2*/ { "fist", LONG, 0, 0 }, 404 /*3*/ { "fistp", LONG, 0, 0 }, 405 /*4*/ { "", WORD, op1(X), db_Escb4 }, 406 /*5*/ { "fld", EXTR, 0, 0 }, 407 /*6*/ { "", WORD, 0, 0 }, 408 /*7*/ { "fstp", EXTR, 0, 0 }, 409 }; 410 411 static const struct finst db_Escc[] = { 412 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 413 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 414 /*2*/ { "fcom", DBLR, 0, 0 }, 415 /*3*/ { "fcomp", DBLR, 0, 0 }, 416 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 417 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 418 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 419 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 420 }; 421 422 static const struct finst db_Escd[] = { 423 /*0*/ { "fld", DBLR, op1(STI), "ffree" }, 424 /*1*/ { "", NONE, 0, 0 }, 425 /*2*/ { "fst", DBLR, op1(STI), 0 }, 426 /*3*/ { "fstp", DBLR, op1(STI), 0 }, 427 /*4*/ { "frstor", NONE, op1(STI), "fucom" }, 428 /*5*/ { "", NONE, op1(STI), "fucomp" }, 429 /*6*/ { "fnsave", NONE, 0, 0 }, 430 /*7*/ { "fnstsw", NONE, 0, 0 }, 431 }; 432 433 static const struct finst db_Esce[] = { 434 /*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" }, 435 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" }, 436 /*2*/ { "ficom", WORD, 0, 0 }, 437 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 }, 438 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" }, 439 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" }, 440 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" }, 441 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" }, 442 }; 443 444 static const struct finst db_Escf[] = { 445 /*0*/ { "fild", WORD, 0, 0 }, 446 /*1*/ { "", NONE, 0, 0 }, 447 /*2*/ { "fist", WORD, 0, 0 }, 448 /*3*/ { "fistp", WORD, 0, 0 }, 449 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, 450 /*5*/ { "fild", QUAD, 0, 0 }, 451 /*6*/ { "fbstp", NONE, 0, 0 }, 452 /*7*/ { "fistp", QUAD, 0, 0 }, 453 }; 454 455 static const struct finst * const db_Esc_inst[] = { 456 db_Esc8, db_Esc9, db_Esca, db_Escb, 457 db_Escc, db_Escd, db_Esce, db_Escf 458 }; 459 460 static const char * const db_Grp1[] = { 461 "add", 462 "or", 463 "adc", 464 "sbb", 465 "and", 466 "sub", 467 "xor", 468 "cmp" 469 }; 470 471 static const char * const db_Grp2[] = { 472 "rol", 473 "ror", 474 "rcl", 475 "rcr", 476 "shl", 477 "shr", 478 "shl", 479 "sar" 480 }; 481 482 static const struct inst db_Grp3[] = { 483 { "test", TRUE, NONE, op2(I,E), 0 }, 484 { "test", TRUE, NONE, op2(I,E), 0 }, 485 { "not", TRUE, NONE, op1(E), 0 }, 486 { "neg", TRUE, NONE, op1(E), 0 }, 487 { "mul", TRUE, NONE, op2(E,A), 0 }, 488 { "imul", TRUE, NONE, op2(E,A), 0 }, 489 { "div", TRUE, NONE, op2(E,A), 0 }, 490 { "idiv", TRUE, NONE, op2(E,A), 0 }, 491 }; 492 493 static const struct inst db_Grp4[] = { 494 { "inc", TRUE, BYTE, op1(E), 0 }, 495 { "dec", TRUE, BYTE, op1(E), 0 }, 496 { "", TRUE, NONE, 0, 0 }, 497 { "", TRUE, NONE, 0, 0 }, 498 { "", TRUE, NONE, 0, 0 }, 499 { "", TRUE, NONE, 0, 0 }, 500 { "", TRUE, NONE, 0, 0 }, 501 { "", TRUE, NONE, 0, 0 } 502 }; 503 504 static const struct inst db_Grp5[] = { 505 { "inc", TRUE, LONG, op1(E), 0 }, 506 { "dec", TRUE, LONG, op1(E), 0 }, 507 { "call", TRUE, LONG, op1(Eind),0 }, 508 { "lcall", TRUE, LONG, op1(Eind),0 }, 509 { "jmp", TRUE, LONG, op1(Eind),0 }, 510 { "ljmp", TRUE, LONG, op1(Eind),0 }, 511 { "push", TRUE, LONG, op1(E), 0 }, 512 { "", TRUE, NONE, 0, 0 } 513 }; 514 515 static const struct inst db_inst_table[256] = { 516 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, 517 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, 518 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, 519 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, 520 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 }, 521 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, 522 /*06*/ { "push", FALSE, NONE, op1(Si), 0 }, 523 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, 524 525 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, 526 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, 527 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, 528 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, 529 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, 530 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, 531 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, 532 /*0f*/ { "", FALSE, NONE, 0, 0 }, 533 534 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, 535 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, 536 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, 537 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, 538 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 }, 539 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, 540 /*16*/ { "push", FALSE, NONE, op1(Si), 0 }, 541 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, 542 543 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, 544 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, 545 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, 546 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, 547 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 }, 548 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, 549 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, 550 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, 551 552 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, 553 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, 554 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, 555 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, 556 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, 557 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, 558 /*26*/ { "", FALSE, NONE, 0, 0 }, 559 /*27*/ { "daa", FALSE, NONE, 0, 0 }, 560 561 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, 562 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, 563 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, 564 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, 565 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 }, 566 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, 567 /*2e*/ { "", FALSE, NONE, 0, 0 }, 568 /*2f*/ { "das", FALSE, NONE, 0, 0 }, 569 570 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, 571 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, 572 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, 573 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, 574 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, 575 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, 576 /*36*/ { "", FALSE, NONE, 0, 0 }, 577 /*37*/ { "aaa", FALSE, NONE, 0, 0 }, 578 579 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, 580 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, 581 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, 582 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, 583 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 }, 584 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, 585 /*3e*/ { "", FALSE, NONE, 0, 0 }, 586 /*3f*/ { "aas", FALSE, NONE, 0, 0 }, 587 588 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 589 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 590 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 591 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 592 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 593 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 594 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 595 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 596 597 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 598 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 599 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 600 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 601 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 602 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 603 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 604 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 605 606 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, 607 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, 608 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, 609 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, 610 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, 611 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, 612 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, 613 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, 614 615 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 616 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 617 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 618 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 619 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 620 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 621 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 622 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 623 624 /*60*/ { "pusha", FALSE, LONG, 0, 0 }, 625 /*61*/ { "popa", FALSE, LONG, 0, 0 }, 626 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, 627 /*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 }, 628 629 /*64*/ { "", FALSE, NONE, 0, 0 }, 630 /*65*/ { "", FALSE, NONE, 0, 0 }, 631 /*66*/ { "", FALSE, NONE, 0, 0 }, 632 /*67*/ { "", FALSE, NONE, 0, 0 }, 633 634 /*68*/ { "push", FALSE, LONG, op1(I), 0 }, 635 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, 636 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 }, 637 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, 638 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, 639 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, 640 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, 641 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, 642 643 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, 644 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, 645 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, 646 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, 647 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, 648 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, 649 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, 650 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, 651 652 /*78*/ { "js", FALSE, NONE, op1(Db), 0 }, 653 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, 654 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, 655 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, 656 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, 657 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, 658 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, 659 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, 660 661 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 662 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 }, 663 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 664 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 }, 665 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, 666 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, 667 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, 668 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, 669 670 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, 671 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, 672 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, 673 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, 674 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, 675 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, 676 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, 677 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, 678 679 /*90*/ { "nop", FALSE, NONE, 0, 0 }, 680 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 681 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 682 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 683 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 684 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 685 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 686 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 687 688 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ 689 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ 690 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, 691 /*9b*/ { "wait", FALSE, NONE, 0, 0 }, 692 /*9c*/ { "pushf", FALSE, LONG, 0, 0 }, 693 /*9d*/ { "popf", FALSE, LONG, 0, 0 }, 694 /*9e*/ { "sahf", FALSE, NONE, 0, 0 }, 695 /*9f*/ { "lahf", FALSE, NONE, 0, 0 }, 696 697 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, 698 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, 699 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, 700 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, 701 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, 702 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, 703 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, 704 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, 705 706 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, 707 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, 708 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, 709 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, 710 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, 711 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, 712 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, 713 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, 714 715 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 716 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 717 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 718 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 719 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 720 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 721 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 722 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 723 724 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 725 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 726 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 727 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 728 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 729 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 730 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 731 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 732 733 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 }, 734 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 }, 735 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, 736 /*c3*/ { "ret", FALSE, NONE, 0, 0 }, 737 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, 738 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, 739 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, 740 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, 741 742 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 }, 743 /*c9*/ { "leave", FALSE, NONE, 0, 0 }, 744 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, 745 /*cb*/ { "lret", FALSE, NONE, 0, 0 }, 746 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, 747 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, 748 /*ce*/ { "into", FALSE, NONE, 0, 0 }, 749 /*cf*/ { "iret", FALSE, NONE, 0, 0 }, 750 751 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 }, 752 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 }, 753 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 }, 754 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 }, 755 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 }, 756 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 }, 757 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 }, 758 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, 759 760 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 }, 761 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 }, 762 /*da*/ { "", TRUE, NONE, 0, db_Esca }, 763 /*db*/ { "", TRUE, NONE, 0, db_Escb }, 764 /*dc*/ { "", TRUE, NONE, 0, db_Escc }, 765 /*dd*/ { "", TRUE, NONE, 0, db_Escd }, 766 /*de*/ { "", TRUE, NONE, 0, db_Esce }, 767 /*df*/ { "", TRUE, NONE, 0, db_Escf }, 768 769 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, 770 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, 771 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, 772 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, 773 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, 774 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, 775 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, 776 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, 777 778 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, 779 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, 780 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, 781 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, 782 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, 783 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, 784 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, 785 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, 786 787 /*f0*/ { "", FALSE, NONE, 0, 0 }, 788 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 }, 789 /*f2*/ { "", FALSE, NONE, 0, 0 }, 790 /*f3*/ { "", FALSE, NONE, 0, 0 }, 791 /*f4*/ { "hlt", FALSE, NONE, 0, 0 }, 792 /*f5*/ { "cmc", FALSE, NONE, 0, 0 }, 793 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 }, 794 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 }, 795 796 /*f8*/ { "clc", FALSE, NONE, 0, 0 }, 797 /*f9*/ { "stc", FALSE, NONE, 0, 0 }, 798 /*fa*/ { "cli", FALSE, NONE, 0, 0 }, 799 /*fb*/ { "sti", FALSE, NONE, 0, 0 }, 800 /*fc*/ { "cld", FALSE, NONE, 0, 0 }, 801 /*fd*/ { "std", FALSE, NONE, 0, 0 }, 802 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 }, 803 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 }, 804 }; 805 806 static const struct inst db_bad_inst = 807 { "???", FALSE, NONE, 0, 0 } 808 ; 809 810 #define f_mod(byte) ((byte)>>6) 811 #define f_reg(byte) (((byte)>>3)&0x7) 812 #define f_rm(byte) ((byte)&0x7) 813 814 #define sib_ss(byte) ((byte)>>6) 815 #define sib_index(byte) (((byte)>>3)&0x7) 816 #define sib_base(byte) ((byte)&0x7) 817 818 struct i_addr { 819 int is_reg; /* if reg, reg number is in 'disp' */ 820 int disp; 821 const char * base; 822 const char * index; 823 int ss; 824 }; 825 826 static const char * const db_index_reg_16[8] = { 827 "%bx,%si", 828 "%bx,%di", 829 "%bp,%si", 830 "%bp,%di", 831 "%si", 832 "%di", 833 "%bp", 834 "%bx" 835 }; 836 837 static const char * const db_reg[3][8] = { 838 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, 839 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, 840 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } 841 }; 842 843 static const char * const db_seg_reg[8] = { 844 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 845 }; 846 847 /* 848 * lengths for size attributes 849 */ 850 static const int db_lengths[] = { 851 1, /* BYTE */ 852 2, /* WORD */ 853 4, /* LONG */ 854 8, /* QUAD */ 855 4, /* SNGL */ 856 8, /* DBLR */ 857 10, /* EXTR */ 858 }; 859 860 #define get_value_inc(result, loc, size, is_signed) \ 861 result = db_get_value((loc), (size), (is_signed)); \ 862 (loc) += (size); 863 864 static db_addr_t 865 db_disasm_esc(db_addr_t loc, int inst, int short_addr, 866 int size, const char *seg); 867 static void db_print_address(const char *seg, int size, 868 struct i_addr *addrp); 869 static db_addr_t 870 db_read_address(db_addr_t loc, int short_addr, int regmodrm, 871 struct i_addr *addrp); 872 873 /* 874 * Read address at location and return updated location. 875 */ 876 static db_addr_t 877 db_read_address(loc, short_addr, regmodrm, addrp) 878 db_addr_t loc; 879 int short_addr; 880 int regmodrm; 881 struct i_addr * addrp; /* out */ 882 { 883 int mod, rm, sib, index, disp; 884 885 mod = f_mod(regmodrm); 886 rm = f_rm(regmodrm); 887 888 if (mod == 3) { 889 addrp->is_reg = TRUE; 890 addrp->disp = rm; 891 return (loc); 892 } 893 addrp->is_reg = FALSE; 894 addrp->index = 0; 895 896 if (short_addr) { 897 addrp->index = 0; 898 addrp->ss = 0; 899 switch (mod) { 900 case 0: 901 if (rm == 6) { 902 get_value_inc(disp, loc, 2, FALSE); 903 addrp->disp = disp; 904 addrp->base = 0; 905 } 906 else { 907 addrp->disp = 0; 908 addrp->base = db_index_reg_16[rm]; 909 } 910 break; 911 case 1: 912 get_value_inc(disp, loc, 1, TRUE); 913 disp &= 0xFFFF; 914 addrp->disp = disp; 915 addrp->base = db_index_reg_16[rm]; 916 break; 917 case 2: 918 get_value_inc(disp, loc, 2, FALSE); 919 addrp->disp = disp; 920 addrp->base = db_index_reg_16[rm]; 921 break; 922 } 923 } 924 else { 925 if (mod != 3 && rm == 4) { 926 get_value_inc(sib, loc, 1, FALSE); 927 rm = sib_base(sib); 928 index = sib_index(sib); 929 if (index != 4) 930 addrp->index = db_reg[LONG][index]; 931 addrp->ss = sib_ss(sib); 932 } 933 934 switch (mod) { 935 case 0: 936 if (rm == 5) { 937 get_value_inc(addrp->disp, loc, 4, FALSE); 938 addrp->base = 0; 939 } 940 else { 941 addrp->disp = 0; 942 addrp->base = db_reg[LONG][rm]; 943 } 944 break; 945 946 case 1: 947 get_value_inc(disp, loc, 1, TRUE); 948 addrp->disp = disp; 949 addrp->base = db_reg[LONG][rm]; 950 break; 951 952 case 2: 953 get_value_inc(disp, loc, 4, FALSE); 954 addrp->disp = disp; 955 addrp->base = db_reg[LONG][rm]; 956 break; 957 } 958 } 959 return (loc); 960 } 961 962 static void 963 db_print_address(seg, size, addrp) 964 const char * seg; 965 int size; 966 struct i_addr * addrp; 967 { 968 if (addrp->is_reg) { 969 db_printf("%s", db_reg[size][addrp->disp]); 970 return; 971 } 972 973 if (seg) { 974 db_printf("%s:", seg); 975 } 976 977 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY); 978 if (addrp->base != 0 || addrp->index != 0) { 979 db_printf("("); 980 if (addrp->base) 981 db_printf("%s", addrp->base); 982 if (addrp->index) 983 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 984 db_printf(")"); 985 } 986 } 987 988 /* 989 * Disassemble floating-point ("escape") instruction 990 * and return updated location. 991 */ 992 static db_addr_t 993 db_disasm_esc(loc, inst, short_addr, size, seg) 994 db_addr_t loc; 995 int inst; 996 int short_addr; 997 int size; 998 const char * seg; 999 { 1000 int regmodrm; 1001 const struct finst * fp; 1002 int mod; 1003 struct i_addr address; 1004 const char * name; 1005 1006 get_value_inc(regmodrm, loc, 1, FALSE); 1007 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 1008 mod = f_mod(regmodrm); 1009 if (mod != 3) { 1010 if (*fp->f_name == '\0') { 1011 db_printf("<bad instruction>"); 1012 return (loc); 1013 } 1014 /* 1015 * Normal address modes. 1016 */ 1017 loc = db_read_address(loc, short_addr, regmodrm, &address); 1018 db_printf("%s", fp->f_name); 1019 switch(fp->f_size) { 1020 case SNGL: 1021 db_printf("s"); 1022 break; 1023 case DBLR: 1024 db_printf("l"); 1025 break; 1026 case EXTR: 1027 db_printf("t"); 1028 break; 1029 case WORD: 1030 db_printf("s"); 1031 break; 1032 case LONG: 1033 db_printf("l"); 1034 break; 1035 case QUAD: 1036 db_printf("q"); 1037 break; 1038 default: 1039 break; 1040 } 1041 db_printf("\t"); 1042 db_print_address(seg, BYTE, &address); 1043 } 1044 else { 1045 /* 1046 * 'reg-reg' - special formats 1047 */ 1048 switch (fp->f_rrmode) { 1049 case op2(ST,STI): 1050 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1051 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1052 break; 1053 case op2(STI,ST): 1054 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1055 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1056 break; 1057 case op1(STI): 1058 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1059 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1060 break; 1061 case op1(X): 1062 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1063 if (*name == '\0') 1064 goto bad; 1065 db_printf("%s", name); 1066 break; 1067 case op1(XA): 1068 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1069 if (*name == '\0') 1070 goto bad; 1071 db_printf("%s\t%%ax", name); 1072 break; 1073 default: 1074 bad: 1075 db_printf("<bad instruction>"); 1076 break; 1077 } 1078 } 1079 1080 return (loc); 1081 } 1082 1083 /* 1084 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1085 * (optional) alternate format. Return address of start of 1086 * next instruction. 1087 */ 1088 db_addr_t 1089 db_disasm(loc, altfmt) 1090 db_addr_t loc; 1091 boolean_t altfmt; 1092 { 1093 int inst; 1094 int size; 1095 int short_addr; 1096 const char * seg; 1097 const struct inst * ip; 1098 const char * i_name; 1099 int i_size; 1100 int i_mode; 1101 int regmodrm = 0; 1102 boolean_t first; 1103 int displ; 1104 int prefix; 1105 int imm; 1106 int imm2; 1107 int len; 1108 struct i_addr address; 1109 1110 get_value_inc(inst, loc, 1, FALSE); 1111 short_addr = FALSE; 1112 size = LONG; 1113 seg = 0; 1114 1115 /* 1116 * Get prefixes 1117 */ 1118 prefix = TRUE; 1119 do { 1120 switch (inst) { 1121 case 0x66: /* data16 */ 1122 size = WORD; 1123 break; 1124 case 0x67: 1125 short_addr = TRUE; 1126 break; 1127 case 0x26: 1128 seg = "%es"; 1129 break; 1130 case 0x36: 1131 seg = "%ss"; 1132 break; 1133 case 0x2e: 1134 seg = "%cs"; 1135 break; 1136 case 0x3e: 1137 seg = "%ds"; 1138 break; 1139 case 0x64: 1140 seg = "%fs"; 1141 break; 1142 case 0x65: 1143 seg = "%gs"; 1144 break; 1145 case 0xf0: 1146 db_printf("lock "); 1147 break; 1148 case 0xf2: 1149 db_printf("repne "); 1150 break; 1151 case 0xf3: 1152 db_printf("repe "); /* XXX repe VS rep */ 1153 break; 1154 default: 1155 prefix = FALSE; 1156 break; 1157 } 1158 if (prefix) { 1159 get_value_inc(inst, loc, 1, FALSE); 1160 } 1161 } while (prefix); 1162 1163 if (inst >= 0xd8 && inst <= 0xdf) { 1164 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1165 db_printf("\n"); 1166 return (loc); 1167 } 1168 1169 if (inst == 0x0f) { 1170 get_value_inc(inst, loc, 1, FALSE); 1171 ip = db_inst_0f[inst>>4]; 1172 if (ip == 0) { 1173 ip = &db_bad_inst; 1174 } 1175 else { 1176 ip = &ip[inst&0xf]; 1177 } 1178 } 1179 else 1180 ip = &db_inst_table[inst]; 1181 1182 if (ip->i_has_modrm) { 1183 get_value_inc(regmodrm, loc, 1, FALSE); 1184 loc = db_read_address(loc, short_addr, regmodrm, &address); 1185 } 1186 1187 i_name = ip->i_name; 1188 i_size = ip->i_size; 1189 i_mode = ip->i_mode; 1190 1191 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 || 1192 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 || 1193 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) { 1194 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)]; 1195 } 1196 else if (ip->i_extra == db_Grp3) { 1197 ip = ip->i_extra; 1198 ip = &ip[f_reg(regmodrm)]; 1199 i_name = ip->i_name; 1200 i_mode = ip->i_mode; 1201 } 1202 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) { 1203 ip = ip->i_extra; 1204 ip = &ip[f_reg(regmodrm)]; 1205 i_name = ip->i_name; 1206 i_mode = ip->i_mode; 1207 i_size = ip->i_size; 1208 } 1209 1210 if (i_size == SDEP) { 1211 if (size == WORD) 1212 db_printf("%s", i_name); 1213 else 1214 db_printf("%s", (const char *)ip->i_extra); 1215 } 1216 else { 1217 db_printf("%s", i_name); 1218 if (i_size != NONE) { 1219 if (i_size == BYTE) { 1220 db_printf("b"); 1221 size = BYTE; 1222 } 1223 else if (i_size == WORD) { 1224 db_printf("w"); 1225 size = WORD; 1226 } 1227 else if (size == WORD) 1228 db_printf("w"); 1229 else 1230 db_printf("l"); 1231 } 1232 } 1233 db_printf("\t"); 1234 for (first = TRUE; 1235 i_mode != 0; 1236 i_mode >>= 8, first = FALSE) 1237 { 1238 if (!first) 1239 db_printf(","); 1240 1241 switch (i_mode & 0xFF) { 1242 1243 case E: 1244 db_print_address(seg, size, &address); 1245 break; 1246 1247 case Eind: 1248 db_printf("*"); 1249 db_print_address(seg, size, &address); 1250 break; 1251 1252 case El: 1253 db_print_address(seg, LONG, &address); 1254 break; 1255 1256 case Ew: 1257 db_print_address(seg, WORD, &address); 1258 break; 1259 1260 case Eb: 1261 db_print_address(seg, BYTE, &address); 1262 break; 1263 1264 case R: 1265 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1266 break; 1267 1268 case Rw: 1269 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1270 break; 1271 1272 case Ri: 1273 db_printf("%s", db_reg[size][f_rm(inst)]); 1274 break; 1275 1276 case Ril: 1277 db_printf("%s", db_reg[LONG][f_rm(inst)]); 1278 break; 1279 1280 case S: 1281 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1282 break; 1283 1284 case Si: 1285 db_printf("%s", db_seg_reg[f_reg(inst)]); 1286 break; 1287 1288 case A: 1289 db_printf("%s", db_reg[size][0]); /* acc */ 1290 break; 1291 1292 case BX: 1293 if (seg) 1294 db_printf("%s:", seg); 1295 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1296 break; 1297 1298 case CL: 1299 db_printf("%%cl"); 1300 break; 1301 1302 case DX: 1303 db_printf("%%dx"); 1304 break; 1305 1306 case SI: 1307 if (seg) 1308 db_printf("%s:", seg); 1309 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1310 break; 1311 1312 case DI: 1313 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1314 break; 1315 1316 case CR: 1317 db_printf("%%cr%d", f_reg(regmodrm)); 1318 break; 1319 1320 case DR: 1321 db_printf("%%dr%d", f_reg(regmodrm)); 1322 break; 1323 1324 case TR: 1325 db_printf("%%tr%d", f_reg(regmodrm)); 1326 break; 1327 1328 case I: 1329 len = db_lengths[size]; 1330 get_value_inc(imm, loc, len, FALSE); 1331 db_printf("$%#r", imm); 1332 break; 1333 1334 case Is: 1335 len = db_lengths[size]; 1336 get_value_inc(imm, loc, len, FALSE); 1337 db_printf("$%+#r", imm); 1338 break; 1339 1340 case Ib: 1341 get_value_inc(imm, loc, 1, FALSE); 1342 db_printf("$%#r", imm); 1343 break; 1344 1345 case Iba: 1346 get_value_inc(imm, loc, 1, FALSE); 1347 if (imm != 0x0a) 1348 db_printf("$%#r", imm); 1349 break; 1350 1351 case Ibs: 1352 get_value_inc(imm, loc, 1, TRUE); 1353 if (size == WORD) 1354 imm &= 0xFFFF; 1355 db_printf("$%+#r", imm); 1356 break; 1357 1358 case Iw: 1359 get_value_inc(imm, loc, 2, FALSE); 1360 db_printf("$%#r", imm); 1361 break; 1362 1363 case O: 1364 len = (short_addr ? 2 : 4); 1365 get_value_inc(displ, loc, len, FALSE); 1366 if (seg) 1367 db_printf("%s:%+#r",seg, displ); 1368 else 1369 db_printsym((db_addr_t)displ, DB_STGY_ANY); 1370 break; 1371 1372 case Db: 1373 get_value_inc(displ, loc, 1, TRUE); 1374 displ += loc; 1375 if (size == WORD) 1376 displ &= 0xFFFF; 1377 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1378 break; 1379 1380 case Dl: 1381 len = db_lengths[size]; 1382 get_value_inc(displ, loc, len, FALSE); 1383 displ += loc; 1384 if (size == WORD) 1385 displ &= 0xFFFF; 1386 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1387 break; 1388 1389 case o1: 1390 db_printf("$1"); 1391 break; 1392 1393 case o3: 1394 db_printf("$3"); 1395 break; 1396 1397 case OS: 1398 len = db_lengths[size]; 1399 get_value_inc(imm, loc, len, FALSE); /* offset */ 1400 get_value_inc(imm2, loc, 2, FALSE); /* segment */ 1401 db_printf("$%#r,%#r", imm2, imm); 1402 break; 1403 } 1404 } 1405 db_printf("\n"); 1406 return (loc); 1407 } 1408