1 /* $NetBSD: db_disasm.c,v 1.40 2009/03/14 21:04:10 dsl Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 * 28 * Id: db_disasm.c,v 2.3 91/02/05 17:11:03 mrt (CMU) 29 */ 30 31 /* 32 * Instruction disassembler. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: db_disasm.c,v 1.40 2009/03/14 21:04:10 dsl Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <machine/db_machdep.h> 41 42 #include <ddb/db_access.h> 43 #include <ddb/db_sym.h> 44 #include <ddb/db_output.h> 45 #include <ddb/db_interface.h> 46 47 /* 48 * Size attributes 49 */ 50 #define BYTE 0 51 #define WORD 1 52 #define LONG 2 53 #define QUAD 3 54 #define SNGL 4 55 #define DBLR 5 56 #define EXTR 6 57 #define SDEP 7 58 #define NONE 8 59 60 /* 61 * Addressing modes 62 */ 63 #define E 1 /* general effective address */ 64 #define Eind 2 /* indirect address (jump, call) */ 65 #define Ew 3 /* address, word size */ 66 #define Eb 4 /* address, byte size */ 67 #define R 5 /* register, in 'reg' field */ 68 #define Rw 6 /* word register, in 'reg' field */ 69 #define Ri 7 /* register in instruction */ 70 #define S 8 /* segment reg, in 'reg' field */ 71 #define Si 9 /* segment reg, in instruction */ 72 #define A 10 /* accumulator */ 73 #define BX 11 /* (bx) */ 74 #define CL 12 /* cl, for shifts */ 75 #define DX 13 /* dx, for IO */ 76 #define SI 14 /* si */ 77 #define DI 15 /* di */ 78 #define CR 16 /* control register */ 79 #define DR 17 /* debug register */ 80 #define TR 18 /* test register */ 81 #define I 19 /* immediate, unsigned */ 82 #define Is 20 /* immediate, signed */ 83 #define Ib 21 /* byte immediate, unsigned */ 84 #define Ibs 22 /* byte immediate, signed */ 85 #define Iw 23 /* word immediate, unsigned */ 86 #define Il 24 /* long immediate */ 87 #define O 25 /* direct address */ 88 #define Db 26 /* byte displacement from EIP */ 89 #define Dl 27 /* long displacement from EIP */ 90 #define o1 28 /* constant 1 */ 91 #define o3 29 /* constant 3 */ 92 #define OS 30 /* immediate offset/segment */ 93 #define ST 31 /* FP stack top */ 94 #define STI 32 /* FP stack */ 95 #define X 33 /* extended FP op */ 96 #define XA 34 /* for 'fstcw %ax' */ 97 98 struct inst { 99 const char *i_name; /* name */ 100 short i_has_modrm; /* has regmodrm byte */ 101 short i_size; /* operand size */ 102 int i_mode; /* addressing modes */ 103 const char *i_extra; /* pointer to extra opcode table */ 104 }; 105 106 #define op1(x) (x) 107 #define op2(x,y) ((x)|((y)<<8)) 108 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 109 110 struct finst { 111 const char *f_name; /* name for memory instruction */ 112 int f_size; /* size for memory instruction */ 113 int f_rrmode; /* mode for rr instruction */ 114 const char *f_rrname; /* name for rr instruction 115 (or pointer to table) */ 116 }; 117 118 const char * const db_Grp6[] = { 119 "sldt", 120 "str", 121 "lldt", 122 "ltr", 123 "verr", 124 "verw", 125 "", 126 "" 127 }; 128 129 const char * const db_Grp7[] = { 130 "sgdt", 131 "sidt", 132 "lgdt", 133 "lidt", 134 "smsw", 135 "", 136 "lmsw", 137 "invlpg" 138 }; 139 140 const char * const db_Grp8[] = { 141 "", 142 "", 143 "", 144 "", 145 "bt", 146 "bts", 147 "btr", 148 "btc" 149 }; 150 151 const char * const db_Grp9[] = { 152 "", 153 "cmpxchg8b", 154 "", 155 "", 156 "", 157 "", 158 "", 159 "", 160 }; 161 162 const struct inst db_inst_0f0x[] = { 163 /*00*/ { "", true, NONE, op1(Ew), (const char *)db_Grp6 }, 164 /*01*/ { "", true, NONE, op1(Ew), (const char *)db_Grp7 }, 165 /*02*/ { "lar", true, LONG, op2(E,R), 0 }, 166 /*03*/ { "lsl", true, LONG, op2(E,R), 0 }, 167 /*04*/ { "", false, NONE, 0, 0 }, 168 /*05*/ { "", false, NONE, 0, 0 }, 169 /*06*/ { "clts", false, NONE, 0, 0 }, 170 /*07*/ { "", false, NONE, 0, 0 }, 171 172 /*08*/ { "invd", false, NONE, 0, 0 }, 173 /*09*/ { "wbinvd",false, NONE, 0, 0 }, 174 /*0a*/ { "", false, NONE, 0, 0 }, 175 /*0b*/ { "", false, NONE, 0, 0 }, 176 /*0c*/ { "", false, NONE, 0, 0 }, 177 /*0d*/ { "", false, NONE, 0, 0 }, 178 /*0e*/ { "", false, NONE, 0, 0 }, 179 /*0f*/ { "", false, NONE, 0, 0 }, 180 }; 181 182 const struct inst db_inst_0f2x[] = { 183 /*20*/ { "mov", true, LONG, op2(CR,E), 0 }, /* use E for reg */ 184 /*21*/ { "mov", true, LONG, op2(DR,E), 0 }, /* since mod == 11 */ 185 /*22*/ { "mov", true, LONG, op2(E,CR), 0 }, 186 /*23*/ { "mov", true, LONG, op2(E,DR), 0 }, 187 /*24*/ { "mov", true, LONG, op2(TR,E), 0 }, 188 /*25*/ { "", false, NONE, 0, 0 }, 189 /*26*/ { "mov", true, LONG, op2(E,TR), 0 }, 190 /*27*/ { "", false, NONE, 0, 0 }, 191 192 /*28*/ { "", false, NONE, 0, 0 }, 193 /*29*/ { "", false, NONE, 0, 0 }, 194 /*2a*/ { "", false, NONE, 0, 0 }, 195 /*2b*/ { "", false, NONE, 0, 0 }, 196 /*2c*/ { "", false, NONE, 0, 0 }, 197 /*2d*/ { "", false, NONE, 0, 0 }, 198 /*2e*/ { "", false, NONE, 0, 0 }, 199 /*2f*/ { "", false, NONE, 0, 0 }, 200 }; 201 202 const struct inst db_inst_0f3x[] = { 203 /*30*/ { "wrmsr", false, NONE, 0, 0 }, 204 /*31*/ { "rdtsc", false, NONE, 0, 0 }, 205 /*32*/ { "rdmsr", false, NONE, 0, 0 }, 206 /*33*/ { "rdpmc", false, NONE, 0, 0 }, 207 /*34*/ { "", false, NONE, 0, 0 }, 208 /*35*/ { "", false, NONE, 0, 0 }, 209 /*36*/ { "", false, NONE, 0, 0 }, 210 /*37*/ { "", false, NONE, 0, 0 }, 211 212 /*38*/ { "", false, NONE, 0, 0 }, 213 /*39*/ { "", false, NONE, 0, 0 }, 214 /*3a*/ { "", false, NONE, 0, 0 }, 215 /*3v*/ { "", false, NONE, 0, 0 }, 216 /*3c*/ { "", false, NONE, 0, 0 }, 217 /*3d*/ { "", false, NONE, 0, 0 }, 218 /*3e*/ { "", false, NONE, 0, 0 }, 219 /*3f*/ { "", false, NONE, 0, 0 }, 220 }; 221 222 const struct inst db_inst_0f4x[] = { 223 /*40*/ { "cmovo", true, LONG, op2(E,R), 0 }, 224 /*41*/ { "cmovno", true, LONG, op2(E,R), 0 }, 225 /*42*/ { "cmovc", true, LONG, op2(E,R), 0 }, 226 /*43*/ { "cmovnc", true, LONG, op2(E,R), 0 }, 227 /*44*/ { "cmovz", true, LONG, op2(E,R), 0 }, 228 /*45*/ { "cmovnz", true, LONG, op2(E,R), 0 }, 229 /*46*/ { "cmovbe", true, LONG, op2(E,R), 0 }, 230 /*47*/ { "cmovmbe",true, LONG, op2(E,R), 0 }, 231 /*48*/ { "cmovs", true, LONG, op2(E,R), 0 }, 232 /*49*/ { "cmovns", true, LONG, op2(E,R), 0 }, 233 /*4a*/ { "cmovp", true, LONG, op2(E,R), 0 }, 234 /*4b*/ { "cmovnp", true, LONG, op2(E,R), 0 }, 235 /*4c*/ { "cmovl", true, LONG, op2(E,R), 0 }, 236 /*4d*/ { "cmovnl", true, LONG, op2(E,R), 0 }, 237 /*4e*/ { "cmovle", true, LONG, op2(E,R), 0 }, 238 /*4f*/ { "cmovnle",true, LONG, op2(E,R), 0 }, 239 }; 240 241 const struct inst db_inst_0f8x[] = { 242 /*80*/ { "jo", false, NONE, op1(Dl), 0 }, 243 /*81*/ { "jno", false, NONE, op1(Dl), 0 }, 244 /*82*/ { "jb", false, NONE, op1(Dl), 0 }, 245 /*83*/ { "jnb", false, NONE, op1(Dl), 0 }, 246 /*84*/ { "jz", false, NONE, op1(Dl), 0 }, 247 /*85*/ { "jnz", false, NONE, op1(Dl), 0 }, 248 /*86*/ { "jbe", false, NONE, op1(Dl), 0 }, 249 /*87*/ { "jnbe", false, NONE, op1(Dl), 0 }, 250 251 /*88*/ { "js", false, NONE, op1(Dl), 0 }, 252 /*89*/ { "jns", false, NONE, op1(Dl), 0 }, 253 /*8a*/ { "jp", false, NONE, op1(Dl), 0 }, 254 /*8b*/ { "jnp", false, NONE, op1(Dl), 0 }, 255 /*8c*/ { "jl", false, NONE, op1(Dl), 0 }, 256 /*8d*/ { "jnl", false, NONE, op1(Dl), 0 }, 257 /*8e*/ { "jle", false, NONE, op1(Dl), 0 }, 258 /*8f*/ { "jnle", false, NONE, op1(Dl), 0 }, 259 }; 260 261 const struct inst db_inst_0f9x[] = { 262 /*90*/ { "seto", true, NONE, op1(Eb), 0 }, 263 /*91*/ { "setno", true, NONE, op1(Eb), 0 }, 264 /*92*/ { "setb", true, NONE, op1(Eb), 0 }, 265 /*93*/ { "setnb", true, NONE, op1(Eb), 0 }, 266 /*94*/ { "setz", true, NONE, op1(Eb), 0 }, 267 /*95*/ { "setnz", true, NONE, op1(Eb), 0 }, 268 /*96*/ { "setbe", true, NONE, op1(Eb), 0 }, 269 /*97*/ { "setnbe",true, NONE, op1(Eb), 0 }, 270 271 /*98*/ { "sets", true, NONE, op1(Eb), 0 }, 272 /*99*/ { "setns", true, NONE, op1(Eb), 0 }, 273 /*9a*/ { "setp", true, NONE, op1(Eb), 0 }, 274 /*9b*/ { "setnp", true, NONE, op1(Eb), 0 }, 275 /*9c*/ { "setl", true, NONE, op1(Eb), 0 }, 276 /*9d*/ { "setnl", true, NONE, op1(Eb), 0 }, 277 /*9e*/ { "setle", true, NONE, op1(Eb), 0 }, 278 /*9f*/ { "setnle",true, NONE, op1(Eb), 0 }, 279 }; 280 281 const struct inst db_inst_0fax[] = { 282 /*a0*/ { "push", false, NONE, op1(Si), 0 }, 283 /*a1*/ { "pop", false, NONE, op1(Si), 0 }, 284 /*a2*/ { "cpuid", false, NONE, 0, 0 }, 285 /*a3*/ { "bt", true, LONG, op2(R,E), 0 }, 286 /*a4*/ { "shld", true, LONG, op3(Ib,E,R), 0 }, 287 /*a5*/ { "shld", true, LONG, op3(CL,E,R), 0 }, 288 /*a6*/ { "", false, NONE, 0, 0 }, 289 /*a7*/ { "", false, NONE, 0, 0 }, 290 291 /*a8*/ { "push", false, NONE, op1(Si), 0 }, 292 /*a9*/ { "pop", false, NONE, op1(Si), 0 }, 293 /*aa*/ { "rsm", false, NONE, 0, 0 }, 294 /*ab*/ { "bts", true, LONG, op2(R,E), 0 }, 295 /*ac*/ { "shrd", true, LONG, op3(Ib,E,R), 0 }, 296 /*ad*/ { "shrd", true, LONG, op3(CL,E,R), 0 }, 297 /*ae*/ { "fxsave",true, LONG, 0, 0 }, 298 /*af*/ { "imul", true, LONG, op2(E,R), 0 }, 299 }; 300 301 const struct inst db_inst_0fbx[] = { 302 /*b0*/ { "cmpxchg",true, BYTE, op2(R, E), 0 }, 303 /*b1*/ { "cmpxchg",true, LONG, op2(R, E), 0 }, 304 /*b2*/ { "lss", true, LONG, op2(E, R), 0 }, 305 /*b3*/ { "btr", true, LONG, op2(R, E), 0 }, 306 /*b4*/ { "lfs", true, LONG, op2(E, R), 0 }, 307 /*b5*/ { "lgs", true, LONG, op2(E, R), 0 }, 308 /*b6*/ { "movzb", true, LONG, op2(E, R), 0 }, 309 /*b7*/ { "movzw", true, LONG, op2(E, R), 0 }, 310 311 /*b8*/ { "", false, NONE, 0, 0 }, 312 /*b9*/ { "", false, NONE, 0, 0 }, 313 /*ba*/ { "", true, LONG, op2(Ib, E), (const char *)db_Grp8 }, 314 /*bb*/ { "btc", true, LONG, op2(R, E), 0 }, 315 /*bc*/ { "bsf", true, LONG, op2(E, R), 0 }, 316 /*bd*/ { "bsr", true, LONG, op2(E, R), 0 }, 317 /*be*/ { "movsb", true, LONG, op2(E, R), 0 }, 318 /*bf*/ { "movsw", true, LONG, op2(E, R), 0 }, 319 }; 320 321 const struct inst db_inst_0fcx[] = { 322 /*c0*/ { "xadd", true, BYTE, op2(R, E), 0 }, 323 /*c1*/ { "xadd", true, LONG, op2(R, E), 0 }, 324 /*c2*/ { "", false, NONE, 0, 0 }, 325 /*c3*/ { "", false, NONE, 0, 0 }, 326 /*c4*/ { "", false, NONE, 0, 0 }, 327 /*c5*/ { "", false, NONE, 0, 0 }, 328 /*c6*/ { "", false, NONE, 0, 0 }, 329 /*c7*/ { "", true, NONE, op1(E), (const char *)db_Grp9 }, 330 /*c8*/ { "bswap", false, LONG, op1(Ri), 0 }, 331 /*c9*/ { "bswap", false, LONG, op1(Ri), 0 }, 332 /*ca*/ { "bswap", false, LONG, op1(Ri), 0 }, 333 /*cb*/ { "bswap", false, LONG, op1(Ri), 0 }, 334 /*cc*/ { "bswap", false, LONG, op1(Ri), 0 }, 335 /*cd*/ { "bswap", false, LONG, op1(Ri), 0 }, 336 /*ce*/ { "bswap", false, LONG, op1(Ri), 0 }, 337 /*cf*/ { "bswap", false, LONG, op1(Ri), 0 }, 338 }; 339 340 const struct inst * const db_inst_0f[] = { 341 db_inst_0f0x, 342 0, 343 db_inst_0f2x, 344 db_inst_0f3x, 345 db_inst_0f4x, 346 0, 347 0, 348 0, 349 db_inst_0f8x, 350 db_inst_0f9x, 351 db_inst_0fax, 352 db_inst_0fbx, 353 db_inst_0fcx, 354 0, 355 0, 356 0 357 }; 358 359 const char * const db_Esc92[] = { 360 "fnop", "", "", "", "", "", "", "" 361 }; 362 const char * const db_Esc93[] = { 363 "", "", "", "", "", "", "", "" 364 }; 365 const char * const db_Esc94[] = { 366 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 367 }; 368 const char * const db_Esc95[] = { 369 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 370 }; 371 const char * const db_Esc96[] = { 372 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 373 "fincstp" 374 }; 375 const char * const db_Esc97[] = { 376 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 377 }; 378 379 const char * const db_Esca4[] = { 380 "", "fucompp","", "", "", "", "", "" 381 }; 382 383 const char * const db_Escb4[] = { 384 "", "", "fnclex","fninit","", "", "", "" 385 }; 386 387 const char * const db_Esce3[] = { 388 "", "fcompp","", "", "", "", "", "" 389 }; 390 391 const char * const db_Escf4[] = { 392 "fnstsw","", "", "", "", "", "", "" 393 }; 394 395 const struct finst db_Esc8[] = { 396 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 397 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 398 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 399 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 400 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 401 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 402 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 403 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 404 }; 405 406 const struct finst db_Esc9[] = { 407 /*0*/ { "fld", SNGL, op1(STI), 0 }, 408 /*1*/ { "", NONE, op1(STI), "fxch" }, 409 /*2*/ { "fst", SNGL, op1(X), (const char *)db_Esc92 }, 410 /*3*/ { "fstp", SNGL, op1(X), (const char *)db_Esc93 }, 411 /*4*/ { "fldenv", NONE, op1(X), (const char *)db_Esc94 }, 412 /*5*/ { "fldcw", NONE, op1(X), (const char *)db_Esc95 }, 413 /*6*/ { "fnstenv",NONE, op1(X), (const char *)db_Esc96 }, 414 /*7*/ { "fnstcw", NONE, op1(X), (const char *)db_Esc97 }, 415 }; 416 417 const struct finst db_Esca[] = { 418 /*0*/ { "fiadd", WORD, 0, 0 }, 419 /*1*/ { "fimul", WORD, 0, 0 }, 420 /*2*/ { "ficom", WORD, 0, 0 }, 421 /*3*/ { "ficomp", WORD, 0, 0 }, 422 /*4*/ { "fisub", WORD, op1(X), (const char *)db_Esca4 }, 423 /*5*/ { "fisubr", WORD, 0, 0 }, 424 /*6*/ { "fidiv", WORD, 0, 0 }, 425 /*7*/ { "fidivr", WORD, 0, 0 } 426 }; 427 428 const struct finst db_Escb[] = { 429 /*0*/ { "fild", WORD, 0, 0 }, 430 /*1*/ { "", NONE, 0, 0 }, 431 /*2*/ { "fist", WORD, 0, 0 }, 432 /*3*/ { "fistp", WORD, 0, 0 }, 433 /*4*/ { "", WORD, op1(X), (const char *)db_Escb4 }, 434 /*5*/ { "fld", EXTR, 0, 0 }, 435 /*6*/ { "", WORD, 0, 0 }, 436 /*7*/ { "fstp", EXTR, 0, 0 }, 437 }; 438 439 const struct finst db_Escc[] = { 440 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 441 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 442 /*2*/ { "fcom", DBLR, op2(ST,STI), 0 }, 443 /*3*/ { "fcomp", DBLR, op2(ST,STI), 0 }, 444 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 445 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 446 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 447 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 448 }; 449 450 const struct finst db_Escd[] = { 451 /*0*/ { "fld", DBLR, op1(STI), "ffree" }, 452 /*1*/ { "", NONE, 0, 0 }, 453 /*2*/ { "fst", DBLR, op1(STI), 0 }, 454 /*3*/ { "fstp", DBLR, op1(STI), 0 }, 455 /*4*/ { "frstor", NONE, op1(STI), "fucom" }, 456 /*5*/ { "", NONE, op1(STI), "fucomp" }, 457 /*6*/ { "fnsave", NONE, 0, 0 }, 458 /*7*/ { "fnstsw", NONE, 0, 0 }, 459 }; 460 461 const struct finst db_Esce[] = { 462 /*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" }, 463 /*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" }, 464 /*2*/ { "ficom", LONG, 0, 0 }, 465 /*3*/ { "ficomp", LONG, op1(X), (const char *)db_Esce3 }, 466 /*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" }, 467 /*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" }, 468 /*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" }, 469 /*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" }, 470 }; 471 472 const struct finst db_Escf[] = { 473 /*0*/ { "fild", LONG, 0, 0 }, 474 /*1*/ { "", LONG, 0, 0 }, 475 /*2*/ { "fist", LONG, 0, 0 }, 476 /*3*/ { "fistp", LONG, 0, 0 }, 477 /*4*/ { "fbld", NONE, op1(XA), (const char *)db_Escf4 }, 478 /*5*/ { "fld", QUAD, 0, 0 }, 479 /*6*/ { "fbstp", NONE, 0, 0 }, 480 /*7*/ { "fstp", QUAD, 0, 0 }, 481 }; 482 483 const struct finst * const db_Esc_inst[] = { 484 db_Esc8, db_Esc9, db_Esca, db_Escb, 485 db_Escc, db_Escd, db_Esce, db_Escf 486 }; 487 488 const char * const db_Grp1[] = { 489 "add", 490 "or", 491 "adc", 492 "sbb", 493 "and", 494 "sub", 495 "xor", 496 "cmp" 497 }; 498 499 const char * const db_Grp2[] = { 500 "rol", 501 "ror", 502 "rcl", 503 "rcr", 504 "shl", 505 "shr", 506 "shl", 507 "sar" 508 }; 509 510 const struct inst db_Grp3[] = { 511 { "test", true, NONE, op2(I,E), 0 }, 512 { "test", true, NONE, op2(I,E), 0 }, 513 { "not", true, NONE, op1(E), 0 }, 514 { "neg", true, NONE, op1(E), 0 }, 515 { "mul", true, NONE, op2(E,A), 0 }, 516 { "imul", true, NONE, op2(E,A), 0 }, 517 { "div", true, NONE, op2(E,A), 0 }, 518 { "idiv", true, NONE, op2(E,A), 0 }, 519 }; 520 521 const struct inst db_Grp4[] = { 522 { "inc", true, BYTE, op1(E), 0 }, 523 { "dec", true, BYTE, op1(E), 0 }, 524 { "", true, NONE, 0, 0 }, 525 { "", true, NONE, 0, 0 }, 526 { "", true, NONE, 0, 0 }, 527 { "", true, NONE, 0, 0 }, 528 { "", true, NONE, 0, 0 }, 529 { "", true, NONE, 0, 0 } 530 }; 531 532 const struct inst db_Grp5[] = { 533 { "inc", true, LONG, op1(E), 0 }, 534 { "dec", true, LONG, op1(E), 0 }, 535 { "call", true, NONE, op1(Eind),0 }, 536 { "lcall", true, NONE, op1(Eind),0 }, 537 { "jmp", true, NONE, op1(Eind),0 }, 538 { "ljmp", true, NONE, op1(Eind),0 }, 539 { "push", true, LONG, op1(E), 0 }, 540 { "", true, NONE, 0, 0 } 541 }; 542 543 const struct inst db_inst_table[256] = { 544 /*00*/ { "add", true, BYTE, op2(R, E), 0 }, 545 /*01*/ { "add", true, LONG, op2(R, E), 0 }, 546 /*02*/ { "add", true, BYTE, op2(E, R), 0 }, 547 /*03*/ { "add", true, LONG, op2(E, R), 0 }, 548 /*04*/ { "add", false, BYTE, op2(Is, A), 0 }, 549 /*05*/ { "add", false, LONG, op2(Is, A), 0 }, 550 /*06*/ { "push", false, NONE, op1(Si), 0 }, 551 /*07*/ { "pop", false, NONE, op1(Si), 0 }, 552 553 /*08*/ { "or", true, BYTE, op2(R, E), 0 }, 554 /*09*/ { "or", true, LONG, op2(R, E), 0 }, 555 /*0a*/ { "or", true, BYTE, op2(E, R), 0 }, 556 /*0b*/ { "or", true, LONG, op2(E, R), 0 }, 557 /*0c*/ { "or", false, BYTE, op2(I, A), 0 }, 558 /*0d*/ { "or", false, LONG, op2(I, A), 0 }, 559 /*0e*/ { "push", false, NONE, op1(Si), 0 }, 560 /*0f*/ { "", false, NONE, 0, 0 }, 561 562 /*10*/ { "adc", true, BYTE, op2(R, E), 0 }, 563 /*11*/ { "adc", true, LONG, op2(R, E), 0 }, 564 /*12*/ { "adc", true, BYTE, op2(E, R), 0 }, 565 /*13*/ { "adc", true, LONG, op2(E, R), 0 }, 566 /*14*/ { "adc", false, BYTE, op2(Is, A), 0 }, 567 /*15*/ { "adc", false, LONG, op2(Is, A), 0 }, 568 /*16*/ { "push", false, NONE, op1(Si), 0 }, 569 /*17*/ { "pop", false, NONE, op1(Si), 0 }, 570 571 /*18*/ { "sbb", true, BYTE, op2(R, E), 0 }, 572 /*19*/ { "sbb", true, LONG, op2(R, E), 0 }, 573 /*1a*/ { "sbb", true, BYTE, op2(E, R), 0 }, 574 /*1b*/ { "sbb", true, LONG, op2(E, R), 0 }, 575 /*1c*/ { "sbb", false, BYTE, op2(Is, A), 0 }, 576 /*1d*/ { "sbb", false, LONG, op2(Is, A), 0 }, 577 /*1e*/ { "push", false, NONE, op1(Si), 0 }, 578 /*1f*/ { "pop", false, NONE, op1(Si), 0 }, 579 580 /*20*/ { "and", true, BYTE, op2(R, E), 0 }, 581 /*21*/ { "and", true, LONG, op2(R, E), 0 }, 582 /*22*/ { "and", true, BYTE, op2(E, R), 0 }, 583 /*23*/ { "and", true, LONG, op2(E, R), 0 }, 584 /*24*/ { "and", false, BYTE, op2(I, A), 0 }, 585 /*25*/ { "and", false, LONG, op2(I, A), 0 }, 586 /*26*/ { "", false, NONE, 0, 0 }, 587 /*27*/ { "aaa", false, NONE, 0, 0 }, 588 589 /*28*/ { "sub", true, BYTE, op2(R, E), 0 }, 590 /*29*/ { "sub", true, LONG, op2(R, E), 0 }, 591 /*2a*/ { "sub", true, BYTE, op2(E, R), 0 }, 592 /*2b*/ { "sub", true, LONG, op2(E, R), 0 }, 593 /*2c*/ { "sub", false, BYTE, op2(Is, A), 0 }, 594 /*2d*/ { "sub", false, LONG, op2(Is, A), 0 }, 595 /*2e*/ { "", false, NONE, 0, 0 }, 596 /*2f*/ { "das", false, NONE, 0, 0 }, 597 598 /*30*/ { "xor", true, BYTE, op2(R, E), 0 }, 599 /*31*/ { "xor", true, LONG, op2(R, E), 0 }, 600 /*32*/ { "xor", true, BYTE, op2(E, R), 0 }, 601 /*33*/ { "xor", true, LONG, op2(E, R), 0 }, 602 /*34*/ { "xor", false, BYTE, op2(I, A), 0 }, 603 /*35*/ { "xor", false, LONG, op2(I, A), 0 }, 604 /*36*/ { "", false, NONE, 0, 0 }, 605 /*37*/ { "daa", false, NONE, 0, 0 }, 606 607 /*38*/ { "cmp", true, BYTE, op2(R, E), 0 }, 608 /*39*/ { "cmp", true, LONG, op2(R, E), 0 }, 609 /*3a*/ { "cmp", true, BYTE, op2(E, R), 0 }, 610 /*3b*/ { "cmp", true, LONG, op2(E, R), 0 }, 611 /*3c*/ { "cmp", false, BYTE, op2(Is, A), 0 }, 612 /*3d*/ { "cmp", false, LONG, op2(Is, A), 0 }, 613 /*3e*/ { "", false, NONE, 0, 0 }, 614 /*3f*/ { "aas", false, NONE, 0, 0 }, 615 616 /*40*/ { "inc", false, LONG, op1(Ri), 0 }, 617 /*41*/ { "inc", false, LONG, op1(Ri), 0 }, 618 /*42*/ { "inc", false, LONG, op1(Ri), 0 }, 619 /*43*/ { "inc", false, LONG, op1(Ri), 0 }, 620 /*44*/ { "inc", false, LONG, op1(Ri), 0 }, 621 /*45*/ { "inc", false, LONG, op1(Ri), 0 }, 622 /*46*/ { "inc", false, LONG, op1(Ri), 0 }, 623 /*47*/ { "inc", false, LONG, op1(Ri), 0 }, 624 625 /*48*/ { "dec", false, LONG, op1(Ri), 0 }, 626 /*49*/ { "dec", false, LONG, op1(Ri), 0 }, 627 /*4a*/ { "dec", false, LONG, op1(Ri), 0 }, 628 /*4b*/ { "dec", false, LONG, op1(Ri), 0 }, 629 /*4c*/ { "dec", false, LONG, op1(Ri), 0 }, 630 /*4d*/ { "dec", false, LONG, op1(Ri), 0 }, 631 /*4e*/ { "dec", false, LONG, op1(Ri), 0 }, 632 /*4f*/ { "dec", false, LONG, op1(Ri), 0 }, 633 634 /*50*/ { "push", false, LONG, op1(Ri), 0 }, 635 /*51*/ { "push", false, LONG, op1(Ri), 0 }, 636 /*52*/ { "push", false, LONG, op1(Ri), 0 }, 637 /*53*/ { "push", false, LONG, op1(Ri), 0 }, 638 /*54*/ { "push", false, LONG, op1(Ri), 0 }, 639 /*55*/ { "push", false, LONG, op1(Ri), 0 }, 640 /*56*/ { "push", false, LONG, op1(Ri), 0 }, 641 /*57*/ { "push", false, LONG, op1(Ri), 0 }, 642 643 /*58*/ { "pop", false, LONG, op1(Ri), 0 }, 644 /*59*/ { "pop", false, LONG, op1(Ri), 0 }, 645 /*5a*/ { "pop", false, LONG, op1(Ri), 0 }, 646 /*5b*/ { "pop", false, LONG, op1(Ri), 0 }, 647 /*5c*/ { "pop", false, LONG, op1(Ri), 0 }, 648 /*5d*/ { "pop", false, LONG, op1(Ri), 0 }, 649 /*5e*/ { "pop", false, LONG, op1(Ri), 0 }, 650 /*5f*/ { "pop", false, LONG, op1(Ri), 0 }, 651 652 /*60*/ { "pusha", false, LONG, 0, 0 }, 653 /*61*/ { "popa", false, LONG, 0, 0 }, 654 /*62*/ { "bound", true, LONG, op2(E, R), 0 }, 655 /*63*/ { "arpl", true, NONE, op2(Ew,Rw), 0 }, 656 657 /*64*/ { "", false, NONE, 0, 0 }, 658 /*65*/ { "", false, NONE, 0, 0 }, 659 /*66*/ { "", false, NONE, 0, 0 }, 660 /*67*/ { "", false, NONE, 0, 0 }, 661 662 /*68*/ { "push", false, LONG, op1(I), 0 }, 663 /*69*/ { "imul", true, LONG, op3(I,E,R), 0 }, 664 /*6a*/ { "push", false, LONG, op1(Ib), 0 }, 665 /*6b*/ { "imul", true, LONG, op3(Ibs,E,R),0 }, 666 /*6c*/ { "ins", false, BYTE, op2(DX, DI), 0 }, 667 /*6d*/ { "ins", false, LONG, op2(DX, DI), 0 }, 668 /*6e*/ { "outs", false, BYTE, op2(SI, DX), 0 }, 669 /*6f*/ { "outs", false, LONG, op2(SI, DX), 0 }, 670 671 /*70*/ { "jo", false, NONE, op1(Db), 0 }, 672 /*71*/ { "jno", false, NONE, op1(Db), 0 }, 673 /*72*/ { "jb", false, NONE, op1(Db), 0 }, 674 /*73*/ { "jnb", false, NONE, op1(Db), 0 }, 675 /*74*/ { "jz", false, NONE, op1(Db), 0 }, 676 /*75*/ { "jnz", false, NONE, op1(Db), 0 }, 677 /*76*/ { "jbe", false, NONE, op1(Db), 0 }, 678 /*77*/ { "jnbe", false, NONE, op1(Db), 0 }, 679 680 /*78*/ { "js", false, NONE, op1(Db), 0 }, 681 /*79*/ { "jns", false, NONE, op1(Db), 0 }, 682 /*7a*/ { "jp", false, NONE, op1(Db), 0 }, 683 /*7b*/ { "jnp", false, NONE, op1(Db), 0 }, 684 /*7c*/ { "jl", false, NONE, op1(Db), 0 }, 685 /*7d*/ { "jnl", false, NONE, op1(Db), 0 }, 686 /*7e*/ { "jle", false, NONE, op1(Db), 0 }, 687 /*7f*/ { "jnle", false, NONE, op1(Db), 0 }, 688 689 /*80*/ { "", true, BYTE, op2(I, E), (const char *)db_Grp1 }, 690 /*81*/ { "", true, LONG, op2(I, E), (const char *)db_Grp1 }, 691 /*82*/ { "", true, BYTE, op2(Is,E), (const char *)db_Grp1 }, 692 /*83*/ { "", true, LONG, op2(Ibs,E), (const char *)db_Grp1 }, 693 /*84*/ { "test", true, BYTE, op2(R, E), 0 }, 694 /*85*/ { "test", true, LONG, op2(R, E), 0 }, 695 /*86*/ { "xchg", true, BYTE, op2(R, E), 0 }, 696 /*87*/ { "xchg", true, LONG, op2(R, E), 0 }, 697 698 /*88*/ { "mov", true, BYTE, op2(R, E), 0 }, 699 /*89*/ { "mov", true, LONG, op2(R, E), 0 }, 700 /*8a*/ { "mov", true, BYTE, op2(E, R), 0 }, 701 /*8b*/ { "mov", true, LONG, op2(E, R), 0 }, 702 /*8c*/ { "mov", true, NONE, op2(S, Ew), 0 }, 703 /*8d*/ { "lea", true, LONG, op2(E, R), 0 }, 704 /*8e*/ { "mov", true, NONE, op2(Ew, S), 0 }, 705 /*8f*/ { "pop", true, LONG, op1(E), 0 }, 706 707 /*90*/ { "nop", false, NONE, 0, 0 }, 708 /*91*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 709 /*92*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 710 /*93*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 711 /*94*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 712 /*95*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 713 /*96*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 714 /*97*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 715 716 /*98*/ { "cbw", false, SDEP, 0, "cwde" }, /* cbw/cwde */ 717 /*99*/ { "cwd", false, SDEP, 0, "cdq" }, /* cwd/cdq */ 718 /*9a*/ { "lcall", false, NONE, op1(OS), 0 }, 719 /*9b*/ { "wait", false, NONE, 0, 0 }, 720 /*9c*/ { "pushf", false, LONG, 0, 0 }, 721 /*9d*/ { "popf", false, LONG, 0, 0 }, 722 /*9e*/ { "sahf", false, NONE, 0, 0 }, 723 /*9f*/ { "lahf", false, NONE, 0, 0 }, 724 725 /*a0*/ { "mov", false, BYTE, op2(O, A), 0 }, 726 /*a1*/ { "mov", false, LONG, op2(O, A), 0 }, 727 /*a2*/ { "mov", false, BYTE, op2(A, O), 0 }, 728 /*a3*/ { "mov", false, LONG, op2(A, O), 0 }, 729 /*a4*/ { "movs", false, BYTE, op2(SI,DI), 0 }, 730 /*a5*/ { "movs", false, LONG, op2(SI,DI), 0 }, 731 /*a6*/ { "cmps", false, BYTE, op2(SI,DI), 0 }, 732 /*a7*/ { "cmps", false, LONG, op2(SI,DI), 0 }, 733 734 /*a8*/ { "test", false, BYTE, op2(I, A), 0 }, 735 /*a9*/ { "test", false, LONG, op2(I, A), 0 }, 736 /*aa*/ { "stos", false, BYTE, op1(DI), 0 }, 737 /*ab*/ { "stos", false, LONG, op1(DI), 0 }, 738 /*ac*/ { "lods", false, BYTE, op1(SI), 0 }, 739 /*ad*/ { "lods", false, LONG, op1(SI), 0 }, 740 /*ae*/ { "scas", false, BYTE, op1(SI), 0 }, 741 /*af*/ { "scas", false, LONG, op1(SI), 0 }, 742 743 /*b0*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 744 /*b1*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 745 /*b2*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 746 /*b3*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 747 /*b4*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 748 /*b5*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 749 /*b6*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 750 /*b7*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 751 752 /*b8*/ { "mov", false, LONG, op2(I, Ri), 0 }, 753 /*b9*/ { "mov", false, LONG, op2(I, Ri), 0 }, 754 /*ba*/ { "mov", false, LONG, op2(I, Ri), 0 }, 755 /*bb*/ { "mov", false, LONG, op2(I, Ri), 0 }, 756 /*bc*/ { "mov", false, LONG, op2(I, Ri), 0 }, 757 /*bd*/ { "mov", false, LONG, op2(I, Ri), 0 }, 758 /*be*/ { "mov", false, LONG, op2(I, Ri), 0 }, 759 /*bf*/ { "mov", false, LONG, op2(I, Ri), 0 }, 760 761 /*c0*/ { "", true, BYTE, op2(Ib, E), (const char *)db_Grp2 }, 762 /*c1*/ { "", true, LONG, op2(Ib, E), (const char *)db_Grp2 }, 763 /*c2*/ { "ret", false, NONE, op1(Iw), 0 }, 764 /*c3*/ { "ret", false, NONE, 0, 0 }, 765 /*c4*/ { "les", true, LONG, op2(E, R), 0 }, 766 /*c5*/ { "lds", true, LONG, op2(E, R), 0 }, 767 /*c6*/ { "mov", true, BYTE, op2(I, E), 0 }, 768 /*c7*/ { "mov", true, LONG, op2(I, E), 0 }, 769 770 /*c8*/ { "enter", false, NONE, op2(Ib, Iw), 0 }, 771 /*c9*/ { "leave", false, NONE, 0, 0 }, 772 /*ca*/ { "lret", false, NONE, op1(Iw), 0 }, 773 /*cb*/ { "lret", false, NONE, 0, 0 }, 774 /*cc*/ { "int", false, NONE, op1(o3), 0 }, 775 /*cd*/ { "int", false, NONE, op1(Ib), 0 }, 776 /*ce*/ { "into", false, NONE, 0, 0 }, 777 /*cf*/ { "iret", false, NONE, 0, 0 }, 778 779 /*d0*/ { "", true, BYTE, op2(o1, E), (const char *)db_Grp2 }, 780 /*d1*/ { "", true, LONG, op2(o1, E), (const char *)db_Grp2 }, 781 /*d2*/ { "", true, BYTE, op2(CL, E), (const char *)db_Grp2 }, 782 /*d3*/ { "", true, LONG, op2(CL, E), (const char *)db_Grp2 }, 783 /*d4*/ { "aam", true, NONE, 0, 0 }, 784 /*d5*/ { "aad", true, NONE, 0, 0 }, 785 /*d6*/ { "", false, NONE, 0, 0 }, 786 /*d7*/ { "xlat", false, BYTE, op1(BX), 0 }, 787 788 /*d8*/ { "", true, NONE, 0, (const char *)db_Esc8 }, 789 /*d9*/ { "", true, NONE, 0, (const char *)db_Esc9 }, 790 /*da*/ { "", true, NONE, 0, (const char *)db_Esca }, 791 /*db*/ { "", true, NONE, 0, (const char *)db_Escb }, 792 /*dc*/ { "", true, NONE, 0, (const char *)db_Escc }, 793 /*dd*/ { "", true, NONE, 0, (const char *)db_Escd }, 794 /*de*/ { "", true, NONE, 0, (const char *)db_Esce }, 795 /*df*/ { "", true, NONE, 0, (const char *)db_Escf }, 796 797 /*e0*/ { "loopne",false, NONE, op1(Db), 0 }, 798 /*e1*/ { "loope", false, NONE, op1(Db), 0 }, 799 /*e2*/ { "loop", false, NONE, op1(Db), 0 }, 800 /*e3*/ { "jcxz", false, SDEP, op1(Db), "jecxz" }, 801 /*e4*/ { "in", false, BYTE, op2(Ib, A), 0 }, 802 /*e5*/ { "in", false, LONG, op2(Ib, A) , 0 }, 803 /*e6*/ { "out", false, BYTE, op2(A, Ib), 0 }, 804 /*e7*/ { "out", false, LONG, op2(A, Ib) , 0 }, 805 806 /*e8*/ { "call", false, NONE, op1(Dl), 0 }, 807 /*e9*/ { "jmp", false, NONE, op1(Dl), 0 }, 808 /*ea*/ { "ljmp", false, NONE, op1(OS), 0 }, 809 /*eb*/ { "jmp", false, NONE, op1(Db), 0 }, 810 /*ec*/ { "in", false, BYTE, op2(DX, A), 0 }, 811 /*ed*/ { "in", false, LONG, op2(DX, A) , 0 }, 812 /*ee*/ { "out", false, BYTE, op2(A, DX), 0 }, 813 /*ef*/ { "out", false, LONG, op2(A, DX) , 0 }, 814 815 /*f0*/ { "", false, NONE, 0, 0 }, 816 /*f1*/ { "", false, NONE, 0, 0 }, 817 /*f2*/ { "", false, NONE, 0, 0 }, 818 /*f3*/ { "", false, NONE, 0, 0 }, 819 /*f4*/ { "hlt", false, NONE, 0, 0 }, 820 /*f5*/ { "cmc", false, NONE, 0, 0 }, 821 /*f6*/ { "", true, BYTE, 0, (const char *)db_Grp3 }, 822 /*f7*/ { "", true, LONG, 0, (const char *)db_Grp3 }, 823 824 /*f8*/ { "clc", false, NONE, 0, 0 }, 825 /*f9*/ { "stc", false, NONE, 0, 0 }, 826 /*fa*/ { "cli", false, NONE, 0, 0 }, 827 /*fb*/ { "sti", false, NONE, 0, 0 }, 828 /*fc*/ { "cld", false, NONE, 0, 0 }, 829 /*fd*/ { "std", false, NONE, 0, 0 }, 830 /*fe*/ { "", true, NONE, 0, (const char *)db_Grp4 }, 831 /*ff*/ { "", true, NONE, 0, (const char *)db_Grp5 }, 832 }; 833 834 const struct inst db_bad_inst = 835 { "???", false, NONE, 0, 0 } 836 ; 837 838 #define f_mod(byte) ((byte)>>6) 839 #define f_reg(byte) (((byte)>>3)&0x7) 840 #define f_rm(byte) ((byte)&0x7) 841 842 #define sib_ss(byte) ((byte)>>6) 843 #define sib_index(byte) (((byte)>>3)&0x7) 844 #define sib_base(byte) ((byte)&0x7) 845 846 struct i_addr { 847 int is_reg; /* if reg, reg number is in 'disp' */ 848 int disp; 849 const char * base; 850 const char * index; 851 int ss; 852 }; 853 854 const char * const db_index_reg_16[8] = { 855 "%bx,%si", 856 "%bx,%di", 857 "%bp,%si", 858 "%bp,%di", 859 "%si", 860 "%di", 861 "%bp", 862 "%bx" 863 }; 864 865 const char * const db_reg[3][8] = { 866 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, 867 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, 868 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } 869 }; 870 871 const char * const db_seg_reg[8] = { 872 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 873 }; 874 875 /* 876 * lengths for size attributes 877 */ 878 const int db_lengths[] = { 879 1, /* BYTE */ 880 2, /* WORD */ 881 4, /* LONG */ 882 8, /* QUAD */ 883 4, /* SNGL */ 884 8, /* DBLR */ 885 10, /* EXTR */ 886 }; 887 888 #define get_value_inc(result, loc, size, is_signed) \ 889 do { \ 890 result = db_get_value((loc), (size), (is_signed)); \ 891 (loc) += (size); \ 892 } while (0) 893 894 895 db_addr_t db_read_address(db_addr_t, int, int, struct i_addr *); 896 void db_print_address(const char *, int, struct i_addr *); 897 db_addr_t db_disasm_esc(db_addr_t, int, int, int, const char *); 898 899 /* 900 * Read address at location and return updated location. 901 */ 902 db_addr_t 903 db_read_address(db_addr_t loc, int short_addr, int regmodrm, struct i_addr *addrp) 904 /* addrp: out */ 905 { 906 int mod, rm, sib, index, disp; 907 908 mod = f_mod(regmodrm); 909 rm = f_rm(regmodrm); 910 911 if (mod == 3) { 912 addrp->is_reg = true; 913 addrp->disp = rm; 914 return (loc); 915 } 916 addrp->is_reg = false; 917 addrp->index = 0; 918 919 if (short_addr) { 920 addrp->index = 0; 921 addrp->ss = 0; 922 switch (mod) { 923 case 0: 924 if (rm == 6) { 925 get_value_inc(disp, loc, 2, true); 926 addrp->disp = disp; 927 addrp->base = 0; 928 } else { 929 addrp->disp = 0; 930 addrp->base = db_index_reg_16[rm]; 931 } 932 break; 933 case 1: 934 get_value_inc(disp, loc, 1, true); 935 addrp->disp = disp; 936 addrp->base = db_index_reg_16[rm]; 937 break; 938 case 2: 939 get_value_inc(disp, loc, 2, true); 940 addrp->disp = disp; 941 addrp->base = db_index_reg_16[rm]; 942 break; 943 } 944 } else { 945 if (mod != 3 && rm == 4) { 946 get_value_inc(sib, loc, 1, false); 947 rm = sib_base(sib); 948 index = sib_index(sib); 949 if (index != 4) 950 addrp->index = db_reg[LONG][index]; 951 addrp->ss = sib_ss(sib); 952 } 953 954 switch (mod) { 955 case 0: 956 if (rm == 5) { 957 get_value_inc(addrp->disp, loc, 4, false); 958 addrp->base = 0; 959 } else { 960 addrp->disp = 0; 961 addrp->base = db_reg[LONG][rm]; 962 } 963 break; 964 case 1: 965 get_value_inc(disp, loc, 1, true); 966 addrp->disp = disp; 967 addrp->base = db_reg[LONG][rm]; 968 break; 969 case 2: 970 get_value_inc(disp, loc, 4, false); 971 addrp->disp = disp; 972 addrp->base = db_reg[LONG][rm]; 973 break; 974 } 975 } 976 return (loc); 977 } 978 979 void 980 db_print_address(const char * seg, int size, struct i_addr *addrp) 981 { 982 if (addrp->is_reg) { 983 db_printf("%s", db_reg[size][addrp->disp]); 984 return; 985 } 986 987 if (seg) 988 db_printf("%s:", seg); 989 990 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY, db_printf); 991 if (addrp->base != 0 || addrp->index != 0) { 992 db_printf("("); 993 if (addrp->base) 994 db_printf("%s", addrp->base); 995 if (addrp->index) 996 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 997 db_printf(")"); 998 } 999 } 1000 1001 /* 1002 * Disassemble floating-point ("escape") instruction 1003 * and return updated location. 1004 */ 1005 db_addr_t 1006 db_disasm_esc( 1007 db_addr_t loc, 1008 int inst, 1009 int short_addr, 1010 int size, 1011 const char *seg) 1012 { 1013 int regmodrm; 1014 const struct finst *fp; 1015 int mod; 1016 struct i_addr address; 1017 const char * name; 1018 1019 get_value_inc(regmodrm, loc, 1, false); 1020 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 1021 mod = f_mod(regmodrm); 1022 if (mod != 3) { 1023 /* 1024 * Normal address modes. 1025 */ 1026 loc = db_read_address(loc, short_addr, regmodrm, &address); 1027 db_printf("%s", fp->f_name); 1028 switch(fp->f_size) { 1029 case SNGL: 1030 db_printf("s"); 1031 break; 1032 case DBLR: 1033 db_printf("l"); 1034 break; 1035 case EXTR: 1036 db_printf("t"); 1037 break; 1038 case WORD: 1039 db_printf("s"); 1040 break; 1041 case LONG: 1042 db_printf("l"); 1043 break; 1044 case QUAD: 1045 db_printf("q"); 1046 break; 1047 default: 1048 break; 1049 } 1050 db_printf("\t"); 1051 db_print_address(seg, BYTE, &address); 1052 } else { 1053 /* 1054 * 'reg-reg' - special formats 1055 */ 1056 switch (fp->f_rrmode) { 1057 case op2(ST,STI): 1058 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1059 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1060 break; 1061 case op2(STI,ST): 1062 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1063 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1064 break; 1065 case op1(STI): 1066 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1067 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1068 break; 1069 case op1(X): 1070 db_printf("%s", ((const char *const*)fp->f_rrname)[f_rm(regmodrm)]); 1071 break; 1072 case op1(XA): 1073 db_printf("%s\t%%ax", 1074 ((const char *const*)fp->f_rrname)[f_rm(regmodrm)]); 1075 break; 1076 default: 1077 db_printf("<bad instruction>"); 1078 break; 1079 } 1080 } 1081 1082 return (loc); 1083 } 1084 1085 /* 1086 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1087 * (optional) alternate format. Return address of start of 1088 * next instruction. 1089 */ 1090 db_addr_t 1091 db_disasm( 1092 db_addr_t loc, 1093 bool altfmt) 1094 { 1095 int inst; 1096 int size; 1097 int short_addr; 1098 const char * seg; 1099 const struct inst * ip; 1100 const char * i_name; 1101 int i_size; 1102 int i_mode; 1103 int regmodrm = 0; 1104 bool first; 1105 int displ; 1106 int prefix; 1107 int imm; 1108 int imm2; 1109 int len; 1110 struct i_addr address; 1111 1112 #ifdef _KERNEL 1113 pt_entry_t *pte, *pde; 1114 1115 /* 1116 * Don't try to disassemble the location if the mapping is invalid. 1117 * If we do, we'll fault, and end up debugging the debugger! 1118 * in the case of largepages, "pte" is really the pde and "pde" is 1119 * really the entry for the pdp itself. 1120 */ 1121 if ((vaddr_t)loc >= VM_MIN_KERNEL_ADDRESS) 1122 pte = kvtopte((vaddr_t)loc); 1123 else 1124 pte = vtopte((vaddr_t)loc); 1125 pde = vtopte((vaddr_t)pte); 1126 if ((*pde & PG_V) == 0 || (*pte & PG_V) == 0) { 1127 db_printf("invalid address\n"); 1128 return (loc); 1129 } 1130 #endif 1131 1132 get_value_inc(inst, loc, 1, false); 1133 short_addr = false; 1134 size = LONG; 1135 seg = 0; 1136 1137 /* 1138 * Get prefixes 1139 */ 1140 prefix = true; 1141 do { 1142 switch (inst) { 1143 case 0x66: /* data16 */ 1144 size = WORD; 1145 break; 1146 case 0x67: 1147 short_addr = true; 1148 break; 1149 case 0x26: 1150 seg = "%es"; 1151 break; 1152 case 0x36: 1153 seg = "%ss"; 1154 break; 1155 case 0x2e: 1156 seg = "%cs"; 1157 break; 1158 case 0x3e: 1159 seg = "%ds"; 1160 break; 1161 case 0x64: 1162 seg = "%fs"; 1163 break; 1164 case 0x65: 1165 seg = "%gs"; 1166 break; 1167 case 0xf0: 1168 db_printf("lock "); 1169 break; 1170 case 0xf2: 1171 db_printf("repne "); 1172 break; 1173 case 0xf3: 1174 db_printf("repe "); /* XXX repe VS rep */ 1175 break; 1176 default: 1177 prefix = false; 1178 break; 1179 } 1180 if (prefix) 1181 get_value_inc(inst, loc, 1, false); 1182 } while (prefix); 1183 1184 if (inst >= 0xd8 && inst <= 0xdf) { 1185 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1186 db_printf("\n"); 1187 return (loc); 1188 } 1189 1190 if (inst == 0x0f) { 1191 get_value_inc(inst, loc, 1, false); 1192 ip = db_inst_0f[inst>>4]; 1193 if (ip == 0) 1194 ip = &db_bad_inst; 1195 else 1196 ip = &ip[inst&0xf]; 1197 } else { 1198 ip = &db_inst_table[inst]; 1199 } 1200 1201 if (ip->i_has_modrm) { 1202 get_value_inc(regmodrm, loc, 1, false); 1203 loc = db_read_address(loc, short_addr, regmodrm, &address); 1204 } 1205 1206 i_name = ip->i_name; 1207 i_size = ip->i_size; 1208 i_mode = ip->i_mode; 1209 1210 if (ip->i_extra == (const char *)db_Grp1 || 1211 ip->i_extra == (const char *)db_Grp2 || 1212 ip->i_extra == (const char *)db_Grp6 || 1213 ip->i_extra == (const char *)db_Grp7 || 1214 ip->i_extra == (const char *)db_Grp8) { 1215 i_name = ((const char *const*)ip->i_extra)[f_reg(regmodrm)]; 1216 } else if (ip->i_extra == (const char *)db_Grp3) { 1217 ip = (const struct inst *)ip->i_extra; 1218 ip = &ip[f_reg(regmodrm)]; 1219 i_name = ip->i_name; 1220 i_mode = ip->i_mode; 1221 } else if (ip->i_extra == (const char *)db_Grp4 || 1222 ip->i_extra == (const char *)db_Grp5) { 1223 ip = (const struct inst *)ip->i_extra; 1224 ip = &ip[f_reg(regmodrm)]; 1225 i_name = ip->i_name; 1226 i_mode = ip->i_mode; 1227 i_size = ip->i_size; 1228 } 1229 1230 if (i_size == SDEP) { 1231 if (size == WORD) 1232 db_printf("%s", i_name); 1233 else 1234 db_printf("%s", ip->i_extra); 1235 } else { 1236 db_printf("%s", i_name); 1237 if (i_size != NONE) { 1238 if (i_size == BYTE) { 1239 db_printf("b"); 1240 size = BYTE; 1241 } else if (i_size == WORD) { 1242 db_printf("w"); 1243 size = WORD; 1244 } else if (size == WORD) { 1245 db_printf("w"); 1246 } else { 1247 db_printf("l"); 1248 } 1249 } 1250 } 1251 db_printf("\t"); 1252 for (first = true; 1253 i_mode != 0; 1254 i_mode >>= 8, first = false) { 1255 char tbuf[24]; 1256 1257 if (!first) 1258 db_printf(","); 1259 1260 switch (i_mode & 0xFF) { 1261 case E: 1262 db_print_address(seg, size, &address); 1263 break; 1264 case Eind: 1265 db_printf("*"); 1266 db_print_address(seg, size, &address); 1267 break; 1268 case Ew: 1269 db_print_address(seg, WORD, &address); 1270 break; 1271 case Eb: 1272 db_print_address(seg, BYTE, &address); 1273 break; 1274 case R: 1275 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1276 break; 1277 case Rw: 1278 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1279 break; 1280 case Ri: 1281 db_printf("%s", db_reg[size][f_rm(inst)]); 1282 break; 1283 case S: 1284 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1285 break; 1286 case Si: 1287 db_printf("%s", db_seg_reg[f_reg(inst)]); 1288 break; 1289 case A: 1290 db_printf("%s", db_reg[size][0]); /* acc */ 1291 break; 1292 case BX: 1293 if (seg) 1294 db_printf("%s:", seg); 1295 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1296 break; 1297 case CL: 1298 db_printf("%%cl"); 1299 break; 1300 case DX: 1301 db_printf("%%dx"); 1302 break; 1303 case SI: 1304 if (seg) 1305 db_printf("%s:", seg); 1306 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1307 break; 1308 case DI: 1309 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1310 break; 1311 case CR: 1312 db_printf("%%cr%d", f_reg(regmodrm)); 1313 break; 1314 case DR: 1315 db_printf("%%dr%d", f_reg(regmodrm)); 1316 break; 1317 case TR: 1318 db_printf("%%tr%d", f_reg(regmodrm)); 1319 break; 1320 case I: 1321 len = db_lengths[size]; 1322 get_value_inc(imm, loc, len, false);/* unsigned */ 1323 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1324 db_printf("$%s", tbuf); 1325 break; 1326 case Is: 1327 len = db_lengths[size]; 1328 get_value_inc(imm, loc, len, true); /* signed */ 1329 db_format_radix(tbuf, 24, imm, true); 1330 db_printf("$%s", tbuf); 1331 break; 1332 case Ib: 1333 get_value_inc(imm, loc, 1, false); /* unsigned */ 1334 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1335 db_printf("$%s", tbuf); 1336 break; 1337 case Ibs: 1338 get_value_inc(imm, loc, 1, true); /* signed */ 1339 db_format_radix(tbuf, 24, imm, true); 1340 db_printf("$%s", tbuf); 1341 break; 1342 case Iw: 1343 get_value_inc(imm, loc, 2, false); /* unsigned */ 1344 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1345 db_printf("$%s", tbuf); 1346 break; 1347 case Il: 1348 get_value_inc(imm, loc, 4, false); 1349 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1350 db_printf("$%s", tbuf); 1351 break; 1352 case O: 1353 if (short_addr) 1354 get_value_inc(displ, loc, 2, true); 1355 else 1356 get_value_inc(displ, loc, 4, true); 1357 if (seg) { 1358 db_format_radix(tbuf, 24, displ, true); 1359 db_printf("%s:%s", seg, tbuf); 1360 } else 1361 db_printsym((db_addr_t)displ, DB_STGY_ANY, 1362 db_printf); 1363 break; 1364 case Db: 1365 get_value_inc(displ, loc, 1, true); 1366 db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN, 1367 db_printf); 1368 break; 1369 case Dl: 1370 get_value_inc(displ, loc, 4, true); 1371 db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN, 1372 db_printf); 1373 break; 1374 case o1: 1375 db_printf("$1"); 1376 break; 1377 case o3: 1378 db_printf("$3"); 1379 break; 1380 case OS: 1381 get_value_inc(imm, loc, 4, false); /* offset */ 1382 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1383 db_printf("$%s", tbuf); 1384 get_value_inc(imm2, loc, 2, false); /* segment */ 1385 db_format_radix(tbuf, 24, (unsigned int)imm2, true); 1386 db_printf(",%s", tbuf); 1387 break; 1388 } 1389 } 1390 1391 db_printf("\n"); 1392 return (loc); 1393 } 1394