Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/i386/i386/db_disasm.c
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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 * $FreeBSD: src/sys/i386/i386/db_disasm.c,v 1.16.2.2 1999/09/05 08:11:05 peter Exp $ 27 */ 28 29 /* 30 * Instruction disassembler. 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/proc.h> 35 #include <vm/vm.h> 36 #include <vm/vm_param.h> 37 #include <ddb/ddb.h> 38 39 #include <ddb/db_access.h> 40 #include <ddb/db_sym.h> 41 42 /* 43 * Size attributes 44 */ 45 #define BYTE 0 46 #define WORD 1 47 #define LONG 2 48 #define QUAD 3 49 #define SNGL 4 50 #define DBLR 5 51 #define EXTR 6 52 #define SDEP 7 53 #define NONE 8 54 55 /* 56 * Addressing modes 57 */ 58 #define E 1 /* general effective address */ 59 #define Eind 2 /* indirect address (jump, call) */ 60 #define Ew 3 /* address, word size */ 61 #define Eb 4 /* address, byte size */ 62 #define R 5 /* register, in 'reg' field */ 63 #define Rw 6 /* word register, in 'reg' field */ 64 #define Ri 7 /* register in instruction */ 65 #define S 8 /* segment reg, in 'reg' field */ 66 #define Si 9 /* segment reg, in instruction */ 67 #define A 10 /* accumulator */ 68 #define BX 11 /* (bx) */ 69 #define CL 12 /* cl, for shifts */ 70 #define DX 13 /* dx, for IO */ 71 #define SI 14 /* si */ 72 #define DI 15 /* di */ 73 #define CR 16 /* control register */ 74 #define DR 17 /* debug register */ 75 #define TR 18 /* test register */ 76 #define I 19 /* immediate, unsigned */ 77 #define Is 20 /* immediate, signed */ 78 #define Ib 21 /* byte immediate, unsigned */ 79 #define Ibs 22 /* byte immediate, signed */ 80 #define Iw 23 /* word immediate, unsigned */ 81 #define O 25 /* direct address */ 82 #define Db 26 /* byte displacement from EIP */ 83 #define Dl 27 /* long displacement from EIP */ 84 #define o1 28 /* constant 1 */ 85 #define o3 29 /* constant 3 */ 86 #define OS 30 /* immediate offset/segment */ 87 #define ST 31 /* FP stack top */ 88 #define STI 32 /* FP stack */ 89 #define X 33 /* extended FP op */ 90 #define XA 34 /* for 'fstcw %ax' */ 91 #define El 35 /* address, long size */ 92 #define Ril 36 /* long register in instruction */ 93 #define Iba 37 /* byte immediate, don't print if 0xa */ 94 95 struct inst { 96 const char * i_name; /* name */ 97 short i_has_modrm; /* has regmodrm byte */ 98 short i_size; /* operand size */ 99 int i_mode; /* addressing modes */ 100 const void * i_extra; /* pointer to extra opcode table */ 101 }; 102 103 #define op1(x) (x) 104 #define op2(x,y) ((x)|((y)<<8)) 105 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 106 107 struct finst { 108 const char * f_name; /* name for memory instruction */ 109 int f_size; /* size for memory instruction */ 110 int f_rrmode; /* mode for rr instruction */ 111 const void * f_rrname; /* name for rr instruction 112 (or pointer to table) */ 113 }; 114 115 static const char * const db_Grp6[] = { 116 "sldt", 117 "str", 118 "lldt", 119 "ltr", 120 "verr", 121 "verw", 122 "", 123 "" 124 }; 125 126 static const char * const db_Grp7[] = { 127 "sgdt", 128 "sidt", 129 "lgdt", 130 "lidt", 131 "smsw", 132 "", 133 "lmsw", 134 "invlpg" 135 }; 136 137 static const char * const db_Grp8[] = { 138 "", 139 "", 140 "", 141 "", 142 "bt", 143 "bts", 144 "btr", 145 "btc" 146 }; 147 148 static const char * const db_Grp9[] = { 149 "", 150 "cmpxchg8b", 151 "", 152 "", 153 "", 154 "", 155 "", 156 "" 157 }; 158 159 static const struct inst db_inst_0f0x[] = { 160 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 }, 161 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 }, 162 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, 163 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, 164 /*04*/ { "", FALSE, NONE, 0, 0 }, 165 /*05*/ { "", FALSE, NONE, 0, 0 }, 166 /*06*/ { "clts", FALSE, NONE, 0, 0 }, 167 /*07*/ { "", FALSE, NONE, 0, 0 }, 168 169 /*08*/ { "invd", FALSE, NONE, 0, 0 }, 170 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, 171 /*0a*/ { "", FALSE, NONE, 0, 0 }, 172 /*0b*/ { "", FALSE, NONE, 0, 0 }, 173 /*0c*/ { "", FALSE, NONE, 0, 0 }, 174 /*0d*/ { "", FALSE, NONE, 0, 0 }, 175 /*0e*/ { "", FALSE, NONE, 0, 0 }, 176 /*0f*/ { "", FALSE, NONE, 0, 0 }, 177 }; 178 179 static const struct inst db_inst_0f2x[] = { 180 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 }, 181 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 }, 182 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 }, 183 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 }, 184 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 }, 185 /*25*/ { "", FALSE, NONE, 0, 0 }, 186 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 }, 187 /*27*/ { "", FALSE, NONE, 0, 0 }, 188 189 /*28*/ { "", FALSE, NONE, 0, 0 }, 190 /*29*/ { "", FALSE, NONE, 0, 0 }, 191 /*2a*/ { "", FALSE, NONE, 0, 0 }, 192 /*2b*/ { "", FALSE, NONE, 0, 0 }, 193 /*2c*/ { "", FALSE, NONE, 0, 0 }, 194 /*2d*/ { "", FALSE, NONE, 0, 0 }, 195 /*2e*/ { "", FALSE, NONE, 0, 0 }, 196 /*2f*/ { "", FALSE, NONE, 0, 0 }, 197 }; 198 199 static const struct inst db_inst_0f3x[] = { 200 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 }, 201 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 }, 202 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 }, 203 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 }, 204 /*34*/ { "", FALSE, NONE, 0, 0 }, 205 /*35*/ { "", FALSE, NONE, 0, 0 }, 206 /*36*/ { "", FALSE, NONE, 0, 0 }, 207 /*37*/ { "", FALSE, NONE, 0, 0 }, 208 209 /*38*/ { "", FALSE, NONE, 0, 0 }, 210 /*39*/ { "", FALSE, NONE, 0, 0 }, 211 /*3a*/ { "", FALSE, NONE, 0, 0 }, 212 /*3b*/ { "", FALSE, NONE, 0, 0 }, 213 /*3c*/ { "", FALSE, NONE, 0, 0 }, 214 /*3d*/ { "", FALSE, NONE, 0, 0 }, 215 /*3e*/ { "", FALSE, NONE, 0, 0 }, 216 /*3f*/ { "", FALSE, NONE, 0, 0 }, 217 }; 218 219 static const struct inst db_inst_0f8x[] = { 220 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, 221 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, 222 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, 223 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, 224 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, 225 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, 226 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, 227 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, 228 229 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, 230 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, 231 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, 232 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, 233 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, 234 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, 235 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, 236 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, 237 }; 238 239 static const struct inst db_inst_0f9x[] = { 240 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, 241 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, 242 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, 243 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, 244 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, 245 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, 246 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, 247 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, 248 249 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, 250 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, 251 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, 252 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, 253 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, 254 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, 255 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, 256 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, 257 }; 258 259 static const struct inst db_inst_0fax[] = { 260 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, 261 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, 262 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, 263 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 }, 264 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 }, 265 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 }, 266 /*a6*/ { "", FALSE, NONE, 0, 0 }, 267 /*a7*/ { "", FALSE, NONE, 0, 0 }, 268 269 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, 270 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, 271 /*aa*/ { "rsm", FALSE, NONE, 0, 0 }, 272 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 }, 273 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 }, 274 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 }, 275 /*a6*/ { "", FALSE, NONE, 0, 0 }, 276 /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 }, 277 }; 278 279 static const struct inst db_inst_0fbx[] = { 280 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, 281 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, 282 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, 283 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 }, 284 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, 285 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, 286 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 }, 287 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 }, 288 289 /*b8*/ { "", FALSE, NONE, 0, 0 }, 290 /*b9*/ { "", FALSE, NONE, 0, 0 }, 291 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 }, 292 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, 293 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, 294 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, 295 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 }, 296 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 }, 297 }; 298 299 static const struct inst db_inst_0fcx[] = { 300 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, 301 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, 302 /*c2*/ { "", FALSE, NONE, 0, 0 }, 303 /*c3*/ { "", FALSE, NONE, 0, 0 }, 304 /*c4*/ { "", FALSE, NONE, 0, 0 }, 305 /*c5*/ { "", FALSE, NONE, 0, 0 }, 306 /*c6*/ { "", FALSE, NONE, 0, 0 }, 307 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 }, 308 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 309 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 310 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 311 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 312 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 313 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 314 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 315 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 316 }; 317 318 static const struct inst * const db_inst_0f[] = { 319 db_inst_0f0x, 320 0, 321 db_inst_0f2x, 322 db_inst_0f3x, 323 0, 324 0, 325 0, 326 0, 327 db_inst_0f8x, 328 db_inst_0f9x, 329 db_inst_0fax, 330 db_inst_0fbx, 331 db_inst_0fcx, 332 0, 333 0, 334 0 335 }; 336 337 static const char * const db_Esc92[] = { 338 "fnop", "", "", "", "", "", "", "" 339 }; 340 static const char * const db_Esc94[] = { 341 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 342 }; 343 static const char * const db_Esc95[] = { 344 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 345 }; 346 static const char * const db_Esc96[] = { 347 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 348 "fincstp" 349 }; 350 static const char * const db_Esc97[] = { 351 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 352 }; 353 354 static const char * const db_Esca5[] = { 355 "", "fucompp","", "", "", "", "", "" 356 }; 357 358 static const char * const db_Escb4[] = { 359 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", "" 360 }; 361 362 static const char * const db_Esce3[] = { 363 "", "fcompp","", "", "", "", "", "" 364 }; 365 366 static const char * const db_Escf4[] = { 367 "fnstsw","", "", "", "", "", "", "" 368 }; 369 370 static const struct finst db_Esc8[] = { 371 /**/ { "fadd", SNGL, op2(STI,ST), 0 }, 372 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 373 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 374 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 375 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 376 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 377 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 378 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 379 }; 380 381 static const struct finst db_Esc9[] = { 382 /**/ { "fld", SNGL, op1(STI), 0 }, 383 /*1*/ { "", NONE, op1(STI), "fxch" }, 384 /*2*/ { "fst", SNGL, op1(X), db_Esc92 }, 385 /*3*/ { "fstp", SNGL, 0, 0 }, 386 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, 387 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, 388 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, 389 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, 390 }; 391 392 static const struct finst db_Esca[] = { 393 /**/ { "fiadd", LONG, 0, 0 }, 394 /*1*/ { "fimul", LONG, 0, 0 }, 395 /*2*/ { "ficom", LONG, 0, 0 }, 396 /*3*/ { "ficomp", LONG, 0, 0 }, 397 /*4*/ { "fisub", LONG, 0, 0 }, 398 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 }, 399 /*6*/ { "fidiv", LONG, 0, 0 }, 400 /*7*/ { "fidivr", LONG, 0, 0 } 401 }; 402 403 static const struct finst db_Escb[] = { 404 /**/ { "fild", LONG, 0, 0 }, 405 /*1*/ { "", NONE, 0, 0 }, 406 /*2*/ { "fist", LONG, 0, 0 }, 407 /*3*/ { "fistp", LONG, 0, 0 }, 408 /*4*/ { "", WORD, op1(X), db_Escb4 }, 409 /*5*/ { "fld", EXTR, 0, 0 }, 410 /*6*/ { "", WORD, 0, 0 }, 411 /*7*/ { "fstp", EXTR, 0, 0 }, 412 }; 413 414 static const struct finst db_Escc[] = { 415 /**/ { "fadd", DBLR, op2(ST,STI), 0 }, 416 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 417 /*2*/ { "fcom", DBLR, 0, 0 }, 418 /*3*/ { "fcomp", DBLR, 0, 0 }, 419 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 420 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 421 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 422 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 423 }; 424 425 static const struct finst db_Escd[] = { 426 /**/ { "fld", DBLR, op1(STI), "ffree" }, 427 /*1*/ { "", NONE, 0, 0 }, 428 /*2*/ { "fst", DBLR, op1(STI), 0 }, 429 /*3*/ { "fstp", DBLR, op1(STI), 0 }, 430 /*4*/ { "frstor", NONE, op1(STI), "fucom" }, 431 /*5*/ { "", NONE, op1(STI), "fucomp" }, 432 /*6*/ { "fnsave", NONE, 0, 0 }, 433 /*7*/ { "fnstsw", NONE, 0, 0 }, 434 }; 435 436 static const struct finst db_Esce[] = { 437 /**/ { "fiadd", WORD, op2(ST,STI), "faddp" }, 438 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" }, 439 /*2*/ { "ficom", WORD, 0, 0 }, 440 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 }, 441 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" }, 442 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" }, 443 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" }, 444 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" }, 445 }; 446 447 static const struct finst db_Escf[] = { 448 /**/ { "fild", WORD, 0, 0 }, 449 /*1*/ { "", NONE, 0, 0 }, 450 /*2*/ { "fist", WORD, 0, 0 }, 451 /*3*/ { "fistp", WORD, 0, 0 }, 452 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, 453 /*5*/ { "fild", QUAD, 0, 0 }, 454 /*6*/ { "fbstp", NONE, 0, 0 }, 455 /*7*/ { "fistp", QUAD, 0, 0 }, 456 }; 457 458 static const struct finst * const db_Esc_inst[] = { 459 db_Esc8, db_Esc9, db_Esca, db_Escb, 460 db_Escc, db_Escd, db_Esce, db_Escf 461 }; 462 463 static const char * const db_Grp1[] = { 464 "add", 465 "or", 466 "adc", 467 "sbb", 468 "and", 469 "sub", 470 "xor", 471 "cmp" 472 }; 473 474 static const char * const db_Grp2[] = { 475 "rol", 476 "ror", 477 "rcl", 478 "rcr", 479 "shl", 480 "shr", 481 "shl", 482 "sar" 483 }; 484 485 static const struct inst db_Grp3[] = { 486 { "test", TRUE, NONE, op2(I,E), 0 }, 487 { "test", TRUE, NONE, op2(I,E), 0 }, 488 { "not", TRUE, NONE, op1(E), 0 }, 489 { "neg", TRUE, NONE, op1(E), 0 }, 490 { "mul", TRUE, NONE, op2(E,A), 0 }, 491 { "imul", TRUE, NONE, op2(E,A), 0 }, 492 { "div", TRUE, NONE, op2(E,A), 0 }, 493 { "idiv", TRUE, NONE, op2(E,A), 0 }, 494 }; 495 496 static const struct inst db_Grp4[] = { 497 { "inc", TRUE, BYTE, op1(E), 0 }, 498 { "dec", TRUE, BYTE, op1(E), 0 }, 499 { "", TRUE, NONE, 0, 0 }, 500 { "", TRUE, NONE, 0, 0 }, 501 { "", TRUE, NONE, 0, 0 }, 502 { "", TRUE, NONE, 0, 0 }, 503 { "", TRUE, NONE, 0, 0 }, 504 { "", TRUE, NONE, 0, 0 } 505 }; 506 507 static const struct inst db_Grp5[] = { 508 { "inc", TRUE, LONG, op1(E), 0 }, 509 { "dec", TRUE, LONG, op1(E), 0 }, 510 { "call", TRUE, LONG, op1(Eind),0 }, 511 { "lcall", TRUE, LONG, op1(Eind),0 }, 512 { "jmp", TRUE, LONG, op1(Eind),0 }, 513 { "ljmp", TRUE, LONG, op1(Eind),0 }, 514 { "push", TRUE, LONG, op1(E), 0 }, 515 { "", TRUE, NONE, 0, 0 } 516 }; 517 518 static const struct inst db_inst_table[256] = { 519 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, 520 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, 521 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, 522 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, 523 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 }, 524 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, 525 /*06*/ { "push", FALSE, NONE, op1(Si), 0 }, 526 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, 527 528 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, 529 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, 530 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, 531 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, 532 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, 533 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, 534 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, 535 /*0f*/ { "", FALSE, NONE, 0, 0 }, 536 537 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, 538 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, 539 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, 540 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, 541 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 }, 542 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, 543 /*16*/ { "push", FALSE, NONE, op1(Si), 0 }, 544 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, 545 546 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, 547 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, 548 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, 549 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, 550 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 }, 551 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, 552 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, 553 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, 554 555 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, 556 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, 557 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, 558 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, 559 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, 560 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, 561 /*26*/ { "", FALSE, NONE, 0, 0 }, 562 /*27*/ { "daa", FALSE, NONE, 0, 0 }, 563 564 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, 565 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, 566 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, 567 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, 568 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 }, 569 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, 570 /*2e*/ { "", FALSE, NONE, 0, 0 }, 571 /*2f*/ { "das", FALSE, NONE, 0, 0 }, 572 573 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, 574 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, 575 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, 576 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, 577 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, 578 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, 579 /*36*/ { "", FALSE, NONE, 0, 0 }, 580 /*37*/ { "aaa", FALSE, NONE, 0, 0 }, 581 582 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, 583 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, 584 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, 585 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, 586 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 }, 587 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, 588 /*3e*/ { "", FALSE, NONE, 0, 0 }, 589 /*3f*/ { "aas", FALSE, NONE, 0, 0 }, 590 591 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 592 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 593 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 594 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 595 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 596 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 597 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 598 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 599 600 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 601 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 602 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 603 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 604 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 605 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 606 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 607 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 608 609 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, 610 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, 611 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, 612 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, 613 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, 614 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, 615 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, 616 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, 617 618 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 619 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 620 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 621 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 622 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 623 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 624 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 625 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 626 627 /*60*/ { "pusha", FALSE, LONG, 0, 0 }, 628 /*61*/ { "popa", FALSE, LONG, 0, 0 }, 629 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, 630 /*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 }, 631 632 /*64*/ { "", FALSE, NONE, 0, 0 }, 633 /*65*/ { "", FALSE, NONE, 0, 0 }, 634 /*66*/ { "", FALSE, NONE, 0, 0 }, 635 /*67*/ { "", FALSE, NONE, 0, 0 }, 636 637 /*68*/ { "push", FALSE, LONG, op1(I), 0 }, 638 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, 639 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 }, 640 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, 641 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, 642 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, 643 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, 644 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, 645 646 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, 647 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, 648 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, 649 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, 650 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, 651 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, 652 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, 653 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, 654 655 /*78*/ { "js", FALSE, NONE, op1(Db), 0 }, 656 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, 657 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, 658 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, 659 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, 660 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, 661 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, 662 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, 663 664 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 665 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 }, 666 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 667 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 }, 668 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, 669 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, 670 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, 671 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, 672 673 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, 674 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, 675 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, 676 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, 677 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, 678 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, 679 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, 680 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, 681 682 /*90*/ { "nop", FALSE, NONE, 0, 0 }, 683 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 684 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 685 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 686 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 687 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 688 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 689 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 690 691 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ 692 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ 693 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, 694 /*9b*/ { "wait", FALSE, NONE, 0, 0 }, 695 /*9c*/ { "pushf", FALSE, LONG, 0, 0 }, 696 /*9d*/ { "popf", FALSE, LONG, 0, 0 }, 697 /*9e*/ { "sahf", FALSE, NONE, 0, 0 }, 698 /*9f*/ { "lahf", FALSE, NONE, 0, 0 }, 699 700 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, 701 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, 702 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, 703 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, 704 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, 705 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, 706 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, 707 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, 708 709 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, 710 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, 711 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, 712 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, 713 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, 714 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, 715 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, 716 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, 717 718 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 719 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 720 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 721 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 722 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 723 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 724 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 725 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 726 727 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 728 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 729 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 730 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 731 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 732 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 733 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 734 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 735 736 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 }, 737 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 }, 738 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, 739 /*c3*/ { "ret", FALSE, NONE, 0, 0 }, 740 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, 741 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, 742 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, 743 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, 744 745 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 }, 746 /*c9*/ { "leave", FALSE, NONE, 0, 0 }, 747 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, 748 /*cb*/ { "lret", FALSE, NONE, 0, 0 }, 749 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, 750 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, 751 /*ce*/ { "into", FALSE, NONE, 0, 0 }, 752 /*cf*/ { "iret", FALSE, NONE, 0, 0 }, 753 754 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 }, 755 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 }, 756 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 }, 757 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 }, 758 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 }, 759 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 }, 760 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 }, 761 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, 762 763 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 }, 764 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 }, 765 /*da*/ { "", TRUE, NONE, 0, db_Esca }, 766 /*db*/ { "", TRUE, NONE, 0, db_Escb }, 767 /*dc*/ { "", TRUE, NONE, 0, db_Escc }, 768 /*dd*/ { "", TRUE, NONE, 0, db_Escd }, 769 /*de*/ { "", TRUE, NONE, 0, db_Esce }, 770 /*df*/ { "", TRUE, NONE, 0, db_Escf }, 771 772 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, 773 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, 774 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, 775 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, 776 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, 777 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, 778 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, 779 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, 780 781 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, 782 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, 783 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, 784 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, 785 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, 786 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, 787 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, 788 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, 789 790 /*f0*/ { "", FALSE, NONE, 0, 0 }, 791 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 }, 792 /*f2*/ { "", FALSE, NONE, 0, 0 }, 793 /*f3*/ { "", FALSE, NONE, 0, 0 }, 794 /*f4*/ { "hlt", FALSE, NONE, 0, 0 }, 795 /*f5*/ { "cmc", FALSE, NONE, 0, 0 }, 796 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 }, 797 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 }, 798 799 /*f8*/ { "clc", FALSE, NONE, 0, 0 }, 800 /*f9*/ { "stc", FALSE, NONE, 0, 0 }, 801 /*fa*/ { "cli", FALSE, NONE, 0, 0 }, 802 /*fb*/ { "sti", FALSE, NONE, 0, 0 }, 803 /*fc*/ { "cld", FALSE, NONE, 0, 0 }, 804 /*fd*/ { "std", FALSE, NONE, 0, 0 }, 805 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 }, 806 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 }, 807 }; 808 809 static const struct inst db_bad_inst = 810 { "???", FALSE, NONE, 0, 0 } 811 ; 812 813 #define f_mod(byte) ((byte)>>6) 814 #define f_reg(byte) (((byte)>>3)&0x7) 815 #define f_rm(byte) ((byte)&0x7) 816 817 #define sib_ss(byte) ((byte)>>6) 818 #define sib_index(byte) (((byte)>>3)&0x7) 819 #define sib_base(byte) ((byte)&0x7) 820 821 struct i_addr { 822 int is_reg; /* if reg, reg number is in 'disp' */ 823 int disp; 824 const char * base; 825 const char * index; 826 int ss; 827 }; 828 829 static const char * const db_index_reg_16[8] = { 830 "%bx,%si", 831 "%bx,%di", 832 "%bp,%si", 833 "%bp,%di", 834 "%si", 835 "%di", 836 "%bp", 837 "%bx" 838 }; 839 840 static const char * const db_reg[3][8] = { 841 "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh", 842 "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di", 843 "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" 844 }; 845 846 static const char * const db_seg_reg[8] = { 847 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 848 }; 849 850 /* 851 * lengths for size attributes 852 */ 853 static const int db_lengths[] = { 854 1, /* BYTE */ 855 2, /* WORD */ 856 4, /* LONG */ 857 8, /* QUAD */ 858 4, /* SNGL */ 859 8, /* DBLR */ 860 10, /* EXTR */ 861 }; 862 863 #define get_value_inc(result, loc, size, is_signed) \ 864 result = db_get_value((loc), (size), (is_signed)); \ 865 (loc) += (size); 866 867 static db_addr_t 868 db_disasm_esc __P((db_addr_t loc, int inst, int short_addr, 869 int size, const char *seg)); 870 static void db_print_address __P((const char *seg, int size, 871 struct i_addr *addrp)); 872 static db_addr_t 873 db_read_address __P((db_addr_t loc, int short_addr, 874 int regmodrm, struct i_addr *addrp)); 875 876 /* 877 * Read address at location and return updated location. 878 */ 879 static db_addr_t 880 db_read_address(loc, short_addr, regmodrm, addrp) 881 db_addr_t loc; 882 int short_addr; 883 int regmodrm; 884 struct i_addr * addrp; /* out */ 885 { 886 int mod, rm, sib, index, disp; 887 888 mod = f_mod(regmodrm); 889 rm = f_rm(regmodrm); 890 891 if (mod == 3) { 892 addrp->is_reg = TRUE; 893 addrp->disp = rm; 894 return (loc); 895 } 896 addrp->is_reg = FALSE; 897 addrp->index = 0; 898 899 if (short_addr) { 900 addrp->index = 0; 901 addrp->ss = 0; 902 switch (mod) { 903 case 0: 904 if (rm == 6) { 905 get_value_inc(disp, loc, 2, FALSE); 906 addrp->disp = disp; 907 addrp->base = 0; 908 } 909 else { 910 addrp->disp = 0; 911 addrp->base = db_index_reg_16[rm]; 912 } 913 break; 914 case 1: 915 get_value_inc(disp, loc, 1, TRUE); 916 disp &= 0xFFFF; 917 addrp->disp = disp; 918 addrp->base = db_index_reg_16[rm]; 919 break; 920 case 2: 921 get_value_inc(disp, loc, 2, FALSE); 922 addrp->disp = disp; 923 addrp->base = db_index_reg_16[rm]; 924 break; 925 } 926 } 927 else { 928 if (mod != 3 && rm == 4) { 929 get_value_inc(sib, loc, 1, FALSE); 930 rm = sib_base(sib); 931 index = sib_index(sib); 932 if (index != 4) 933 addrp->index = db_reg[LONG][index]; 934 addrp->ss = sib_ss(sib); 935 } 936 937 switch (mod) { 938 case 0: 939 if (rm == 5) { 940 get_value_inc(addrp->disp, loc, 4, FALSE); 941 addrp->base = 0; 942 } 943 else { 944 addrp->disp = 0; 945 addrp->base = db_reg[LONG][rm]; 946 } 947 break; 948 949 case 1: 950 get_value_inc(disp, loc, 1, TRUE); 951 addrp->disp = disp; 952 addrp->base = db_reg[LONG][rm]; 953 break; 954 955 case 2: 956 get_value_inc(disp, loc, 4, FALSE); 957 addrp->disp = disp; 958 addrp->base = db_reg[LONG][rm]; 959 break; 960 } 961 } 962 return (loc); 963 } 964 965 static void 966 db_print_address(seg, size, addrp) 967 const char * seg; 968 int size; 969 struct i_addr * addrp; 970 { 971 if (addrp->is_reg) { 972 db_printf("%s", db_reg[size][addrp->disp]); 973 return; 974 } 975 976 if (seg) { 977 db_printf("%s:", seg); 978 } 979 980 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY); 981 if (addrp->base != 0 || addrp->index != 0) { 982 db_printf("("); 983 if (addrp->base) 984 db_printf("%s", addrp->base); 985 if (addrp->index) 986 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 987 db_printf(")"); 988 } 989 } 990 991 /* 992 * Disassemble floating-point ("escape") instruction 993 * and return updated location. 994 */ 995 static db_addr_t 996 db_disasm_esc(loc, inst, short_addr, size, seg) 997 db_addr_t loc; 998 int inst; 999 int short_addr; 1000 int size; 1001 const char * seg; 1002 { 1003 int regmodrm; 1004 const struct finst * fp; 1005 int mod; 1006 struct i_addr address; 1007 const char * name; 1008 1009 get_value_inc(regmodrm, loc, 1, FALSE); 1010 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 1011 mod = f_mod(regmodrm); 1012 if (mod != 3) { 1013 if (*fp->f_name == '\0') { 1014 db_printf("<bad instruction>"); 1015 return (loc); 1016 } 1017 /* 1018 * Normal address modes. 1019 */ 1020 loc = db_read_address(loc, short_addr, regmodrm, &address); 1021 db_printf(fp->f_name); 1022 switch(fp->f_size) { 1023 case SNGL: 1024 db_printf("s"); 1025 break; 1026 case DBLR: 1027 db_printf("l"); 1028 break; 1029 case EXTR: 1030 db_printf("t"); 1031 break; 1032 case WORD: 1033 db_printf("s"); 1034 break; 1035 case LONG: 1036 db_printf("l"); 1037 break; 1038 case QUAD: 1039 db_printf("q"); 1040 break; 1041 default: 1042 break; 1043 } 1044 db_printf("\t"); 1045 db_print_address(seg, BYTE, &address); 1046 } 1047 else { 1048 /* 1049 * 'reg-reg' - special formats 1050 */ 1051 switch (fp->f_rrmode) { 1052 case op2(ST,STI): 1053 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1054 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1055 break; 1056 case op2(STI,ST): 1057 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1058 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1059 break; 1060 case op1(STI): 1061 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1062 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1063 break; 1064 case op1(X): 1065 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1066 if (*name == '\0') 1067 goto bad; 1068 db_printf("%s", name); 1069 break; 1070 case op1(XA): 1071 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1072 if (*name == '\0') 1073 goto bad; 1074 db_printf("%s\t%%ax", name); 1075 break; 1076 default: 1077 bad: 1078 db_printf("<bad instruction>"); 1079 break; 1080 } 1081 } 1082 1083 return (loc); 1084 } 1085 1086 /* 1087 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1088 * (optional) alternate format. Return address of start of 1089 * next instruction. 1090 */ 1091 db_addr_t 1092 db_disasm(loc, altfmt) 1093 db_addr_t loc; 1094 boolean_t altfmt; 1095 { 1096 int inst; 1097 int size; 1098 int short_addr; 1099 const char * seg; 1100 const struct inst * ip; 1101 const char * i_name; 1102 int i_size; 1103 int i_mode; 1104 int regmodrm = 0; 1105 boolean_t first; 1106 int displ; 1107 int prefix; 1108 int imm; 1109 int imm2; 1110 int len; 1111 struct i_addr address; 1112 1113 get_value_inc(inst, loc, 1, FALSE); 1114 short_addr = FALSE; 1115 size = LONG; 1116 seg = 0; 1117 1118 /* 1119 * Get prefixes 1120 */ 1121 prefix = TRUE; 1122 do { 1123 switch (inst) { 1124 case 0x66: /* data16 */ 1125 size = WORD; 1126 break; 1127 case 0x67: 1128 short_addr = TRUE; 1129 break; 1130 case 0x26: 1131 seg = "%es"; 1132 break; 1133 case 0x36: 1134 seg = "%ss"; 1135 break; 1136 case 0x2e: 1137 seg = "%cs"; 1138 break; 1139 case 0x3e: 1140 seg = "%ds"; 1141 break; 1142 case 0x64: 1143 seg = "%fs"; 1144 break; 1145 case 0x65: 1146 seg = "%gs"; 1147 break; 1148 case 0xf0: 1149 db_printf("lock "); 1150 break; 1151 case 0xf2: 1152 db_printf("repne "); 1153 break; 1154 case 0xf3: 1155 db_printf("repe "); /* XXX repe VS rep */ 1156 break; 1157 default: 1158 prefix = FALSE; 1159 break; 1160 } 1161 if (prefix) { 1162 get_value_inc(inst, loc, 1, FALSE); 1163 } 1164 } while (prefix); 1165 1166 if (inst >= 0xd8 && inst <= 0xdf) { 1167 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1168 db_printf("\n"); 1169 return (loc); 1170 } 1171 1172 if (inst == 0x0f) { 1173 get_value_inc(inst, loc, 1, FALSE); 1174 ip = db_inst_0f[inst>>4]; 1175 if (ip == 0) { 1176 ip = &db_bad_inst; 1177 } 1178 else { 1179 ip = &ip[inst&0xf]; 1180 } 1181 } 1182 else 1183 ip = &db_inst_table[inst]; 1184 1185 if (ip->i_has_modrm) { 1186 get_value_inc(regmodrm, loc, 1, FALSE); 1187 loc = db_read_address(loc, short_addr, regmodrm, &address); 1188 } 1189 1190 i_name = ip->i_name; 1191 i_size = ip->i_size; 1192 i_mode = ip->i_mode; 1193 1194 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 || 1195 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 || 1196 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) { 1197 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)]; 1198 } 1199 else if (ip->i_extra == db_Grp3) { 1200 ip = ip->i_extra; 1201 ip = &ip[f_reg(regmodrm)]; 1202 i_name = ip->i_name; 1203 i_mode = ip->i_mode; 1204 } 1205 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) { 1206 ip = ip->i_extra; 1207 ip = &ip[f_reg(regmodrm)]; 1208 i_name = ip->i_name; 1209 i_mode = ip->i_mode; 1210 i_size = ip->i_size; 1211 } 1212 1213 if (i_size == SDEP) { 1214 if (size == WORD) 1215 db_printf(i_name); 1216 else 1217 db_printf((const char *)ip->i_extra); 1218 } 1219 else { 1220 db_printf(i_name); 1221 if (i_size != NONE) { 1222 if (i_size == BYTE) { 1223 db_printf("b"); 1224 size = BYTE; 1225 } 1226 else if (i_size == WORD) { 1227 db_printf("w"); 1228 size = WORD; 1229 } 1230 else if (size == WORD) 1231 db_printf("w"); 1232 else 1233 db_printf("l"); 1234 } 1235 } 1236 db_printf("\t"); 1237 for (first = TRUE; 1238 i_mode != 0; 1239 i_mode >>= 8, first = FALSE) 1240 { 1241 if (!first) 1242 db_printf(","); 1243 1244 switch (i_mode & 0xFF) { 1245 1246 case E: 1247 db_print_address(seg, size, &address); 1248 break; 1249 1250 case Eind: 1251 db_printf("*"); 1252 db_print_address(seg, size, &address); 1253 break; 1254 1255 case El: 1256 db_print_address(seg, LONG, &address); 1257 break; 1258 1259 case Ew: 1260 db_print_address(seg, WORD, &address); 1261 break; 1262 1263 case Eb: 1264 db_print_address(seg, BYTE, &address); 1265 break; 1266 1267 case R: 1268 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1269 break; 1270 1271 case Rw: 1272 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1273 break; 1274 1275 case Ri: 1276 db_printf("%s", db_reg[size][f_rm(inst)]); 1277 break; 1278 1279 case Ril: 1280 db_printf("%s", db_reg[LONG][f_rm(inst)]); 1281 break; 1282 1283 case S: 1284 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1285 break; 1286 1287 case Si: 1288 db_printf("%s", db_seg_reg[f_reg(inst)]); 1289 break; 1290 1291 case A: 1292 db_printf("%s", db_reg[size][0]); /* acc */ 1293 break; 1294 1295 case BX: 1296 if (seg) 1297 db_printf("%s:", seg); 1298 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1299 break; 1300 1301 case CL: 1302 db_printf("%%cl"); 1303 break; 1304 1305 case DX: 1306 db_printf("%%dx"); 1307 break; 1308 1309 case SI: 1310 if (seg) 1311 db_printf("%s:", seg); 1312 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1313 break; 1314 1315 case DI: 1316 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1317 break; 1318 1319 case CR: 1320 db_printf("%%cr%d", f_reg(regmodrm)); 1321 break; 1322 1323 case DR: 1324 db_printf("%%dr%d", f_reg(regmodrm)); 1325 break; 1326 1327 case TR: 1328 db_printf("%%tr%d", f_reg(regmodrm)); 1329 break; 1330 1331 case I: 1332 len = db_lengths[size]; 1333 get_value_inc(imm, loc, len, FALSE); 1334 db_printf("$%#n", imm); 1335 break; 1336 1337 case Is: 1338 len = db_lengths[size]; 1339 get_value_inc(imm, loc, len, FALSE); 1340 /* 1341 * XXX the + in this format doesn't seem to work right. 1342 * `Is' is equivalent to `I'. 1343 */ 1344 db_printf("$%+#n", imm); 1345 break; 1346 1347 case Ib: 1348 get_value_inc(imm, loc, 1, FALSE); 1349 db_printf("$%#n", imm); 1350 break; 1351 1352 case Iba: 1353 get_value_inc(imm, loc, 1, FALSE); 1354 if (imm != 0x0a) 1355 db_printf("$%#n", imm); 1356 break; 1357 1358 case Ibs: 1359 get_value_inc(imm, loc, 1, TRUE); 1360 if (size == WORD) 1361 imm &= 0xFFFF; 1362 db_printf("$%+#n", imm); 1363 break; 1364 1365 case Iw: 1366 get_value_inc(imm, loc, 2, FALSE); 1367 db_printf("$%#n", imm); 1368 break; 1369 1370 case O: 1371 len = (short_addr ? 2 : 4); 1372 get_value_inc(displ, loc, len, FALSE); 1373 if (seg) 1374 db_printf("%s:%+#n",seg, displ); 1375 else 1376 db_printsym((db_addr_t)displ, DB_STGY_ANY); 1377 break; 1378 1379 case Db: 1380 get_value_inc(displ, loc, 1, TRUE); 1381 displ += loc; 1382 if (size == WORD) 1383 displ &= 0xFFFF; 1384 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1385 break; 1386 1387 case Dl: 1388 len = db_lengths[size]; 1389 get_value_inc(displ, loc, len, FALSE); 1390 displ += loc; 1391 if (size == WORD) 1392 displ &= 0xFFFF; 1393 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1394 break; 1395 1396 case o1: 1397 db_printf("$1"); 1398 break; 1399 1400 case o3: 1401 db_printf("$3"); 1402 break; 1403 1404 case OS: 1405 len = db_lengths[size]; 1406 get_value_inc(imm, loc, len, FALSE); /* offset */ 1407 get_value_inc(imm2, loc, 2, FALSE); /* segment */ 1408 db_printf("$%#n,%#n", imm2, imm); 1409 break; 1410 } 1411 } 1412 db_printf("\n"); 1413 return (loc); 1414 }
Cache object: e1acb22ad44a90201af0332f56162d89
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