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