1/*- 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30/* 31 * Instruction disassembler. 32 */ 33#include <sys/param.h> 34 35#include <ddb/ddb.h> 36#include <ddb/db_access.h> 37#include <ddb/db_sym.h> 38 39/* 40 * Size attributes 41 */ 42#define BYTE 0 43#define WORD 1 44#define LONG 2 45#define QUAD 3 46#define SNGL 4 47#define DBLR 5 48#define EXTR 6 49#define SDEP 7 50#define NONE 8 51 52/* 53 * Addressing modes 54 */ 55#define E 1 /* general effective address */ 56#define Eind 2 /* indirect address (jump, call) */ 57#define Ew 3 /* address, word size */ 58#define Eb 4 /* address, byte size */ 59#define R 5 /* register, in 'reg' field */ 60#define Rw 6 /* word register, in 'reg' field */ 61#define Ri 7 /* register in instruction */ 62#define S 8 /* segment reg, in 'reg' field */ 63#define Si 9 /* segment reg, in instruction */ 64#define A 10 /* accumulator */ 65#define BX 11 /* (bx) */ 66#define CL 12 /* cl, for shifts */ 67#define DX 13 /* dx, for IO */ 68#define SI 14 /* si */ 69#define DI 15 /* di */ 70#define CR 16 /* control register */ 71#define DR 17 /* debug register */ 72#define TR 18 /* test register */ 73#define I 19 /* immediate, unsigned */ 74#define Is 20 /* immediate, signed */ 75#define Ib 21 /* byte immediate, unsigned */ 76#define Ibs 22 /* byte immediate, signed */ 77#define Iw 23 /* word immediate, unsigned */ 78#define O 25 /* direct address */ 79#define Db 26 /* byte displacement from EIP */ 80#define Dl 27 /* long displacement from EIP */ 81#define o1 28 /* constant 1 */ 82#define o3 29 /* constant 3 */ 83#define OS 30 /* immediate offset/segment */ 84#define ST 31 /* FP stack top */ 85#define STI 32 /* FP stack */ 86#define X 33 /* extended FP op */ 87#define XA 34 /* for 'fstcw %ax' */ 88#define El 35 /* address, long size */ 89#define Ril 36 /* long register in instruction */ 90#define Iba 37 /* byte immediate, don't print if 0xa */ 91 92struct inst { 93 const char * i_name; /* name */ 94 short i_has_modrm; /* has regmodrm byte */ 95 short i_size; /* operand size */ 96 int i_mode; /* addressing modes */ 97 const void * i_extra; /* pointer to extra opcode table */ 98}; 99 100#define op1(x) (x) 101#define op2(x,y) ((x)|((y)<<8)) 102#define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 103 104struct finst { 105 const char * f_name; /* name for memory instruction */ 106 int f_size; /* size for memory instruction */ 107 int f_rrmode; /* mode for rr instruction */ 108 const void * f_rrname; /* name for rr instruction 109 (or pointer to table) */ 110}; 111 112static const char * const db_Grp6[] = { 113 "sldt", 114 "str", 115 "lldt", 116 "ltr", 117 "verr", 118 "verw", 119 "", 120 "" 121}; 122 123static const char * const db_Grp7[] = { 124 "sgdt", 125 "sidt", 126 "lgdt", 127 "lidt", 128 "smsw", 129 "", 130 "lmsw", 131 "invlpg" 132}; 133 134static const char * const db_Grp8[] = { 135 "", 136 "", 137 "", 138 "", 139 "bt", 140 "bts", 141 "btr", 142 "btc" 143}; 144 145static const char * const db_Grp9[] = { 146 "", 147 "cmpxchg8b", 148 "", 149 "", 150 "", 151 "", 152 "", 153 "" 154}; 155 156static const char * const db_Grp15[] = { 157 "fxsave", 158 "fxrstor", 159 "ldmxcsr", 160 "stmxcsr", 161 "", 162 "", 163 "", 164 "clflush" 165}; 166 167static const char * const db_Grp15b[] = { 168 "", 169 "", 170 "", 171 "", 172 "", 173 "lfence", 174 "mfence", 175 "sfence" 176}; 177 178static const struct inst db_inst_0f0x[] = { 179/*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 }, 180/*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 }, 181/*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, 182/*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, 183/*04*/ { "", FALSE, NONE, 0, 0 }, 184/*05*/ { "syscall",FALSE,NONE, 0, 0 }, 185/*06*/ { "clts", FALSE, NONE, 0, 0 }, 186/*07*/ { "sysret",FALSE, NONE, 0, 0 }, 187 188/*08*/ { "invd", FALSE, NONE, 0, 0 }, 189/*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, 190/*0a*/ { "", FALSE, NONE, 0, 0 }, 191/*0b*/ { "", FALSE, NONE, 0, 0 }, 192/*0c*/ { "", FALSE, NONE, 0, 0 }, 193/*0d*/ { "", FALSE, NONE, 0, 0 }, 194/*0e*/ { "", FALSE, NONE, 0, 0 }, 195/*0f*/ { "", FALSE, NONE, 0, 0 }, 196}; 197 198static const struct inst db_inst_0f2x[] = { 199/*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 }, 200/*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 }, 201/*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 }, 202/*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 }, 203/*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 }, 204/*25*/ { "", FALSE, NONE, 0, 0 }, 205/*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 }, 206/*27*/ { "", FALSE, NONE, 0, 0 }, 207 208/*28*/ { "", FALSE, NONE, 0, 0 }, 209/*29*/ { "", FALSE, NONE, 0, 0 }, 210/*2a*/ { "", FALSE, NONE, 0, 0 }, 211/*2b*/ { "", FALSE, NONE, 0, 0 }, 212/*2c*/ { "", FALSE, NONE, 0, 0 }, 213/*2d*/ { "", FALSE, NONE, 0, 0 }, 214/*2e*/ { "", FALSE, NONE, 0, 0 }, 215/*2f*/ { "", FALSE, NONE, 0, 0 }, 216}; 217 218static const struct inst db_inst_0f3x[] = { 219/*30*/ { "wrmsr", FALSE, NONE, 0, 0 }, 220/*31*/ { "rdtsc", FALSE, NONE, 0, 0 }, 221/*32*/ { "rdmsr", FALSE, NONE, 0, 0 }, 222/*33*/ { "rdpmc", FALSE, NONE, 0, 0 }, 223/*34*/ { "sysenter",FALSE,NONE, 0, 0 }, 224/*35*/ { "sysexit",FALSE,NONE, 0, 0 }, 225/*36*/ { "", FALSE, NONE, 0, 0 }, 226/*37*/ { "getsec",FALSE, NONE, 0, 0 }, 227 228/*38*/ { "", FALSE, NONE, 0, 0 }, 229/*39*/ { "", FALSE, NONE, 0, 0 }, 230/*3a*/ { "", FALSE, NONE, 0, 0 }, 231/*3b*/ { "", FALSE, NONE, 0, 0 }, 232/*3c*/ { "", FALSE, NONE, 0, 0 }, 233/*3d*/ { "", FALSE, NONE, 0, 0 }, 234/*3e*/ { "", FALSE, NONE, 0, 0 }, 235/*3f*/ { "", FALSE, NONE, 0, 0 }, 236}; 237 238static const struct inst db_inst_0f4x[] = { 239/*40*/ { "cmovo", TRUE, NONE, op2(E, R), 0 }, 240/*41*/ { "cmovno", TRUE, NONE, op2(E, R), 0 }, 241/*42*/ { "cmovb", TRUE, NONE, op2(E, R), 0 }, 242/*43*/ { "cmovnb", TRUE, NONE, op2(E, R), 0 }, 243/*44*/ { "cmovz", TRUE, NONE, op2(E, R), 0 }, 244/*45*/ { "cmovnz", TRUE, NONE, op2(E, R), 0 }, 245/*46*/ { "cmovbe", TRUE, NONE, op2(E, R), 0 }, 246/*47*/ { "cmovnbe",TRUE, NONE, op2(E, R), 0 }, 247 248/*48*/ { "cmovs", TRUE, NONE, op2(E, R), 0 }, 249/*49*/ { "cmovns", TRUE, NONE, op2(E, R), 0 }, 250/*4a*/ { "cmovp", TRUE, NONE, op2(E, R), 0 }, 251/*4b*/ { "cmovnp", TRUE, NONE, op2(E, R), 0 }, 252/*4c*/ { "cmovl", TRUE, NONE, op2(E, R), 0 }, 253/*4d*/ { "cmovnl", TRUE, NONE, op2(E, R), 0 }, 254/*4e*/ { "cmovle", TRUE, NONE, op2(E, R), 0 }, 255/*4f*/ { "cmovnle",TRUE, NONE, op2(E, R), 0 }, 256}; 257 258static const struct inst db_inst_0f8x[] = { 259/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, 260/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, 261/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, 262/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, 263/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, 264/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, 265/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, 266/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, 267 268/*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, 269/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, 270/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, 271/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, 272/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, 273/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, 274/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, 275/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, 276}; 277 278static const struct inst db_inst_0f9x[] = { 279/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, 280/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, 281/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, 282/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, 283/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, 284/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, 285/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, 286/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, 287 288/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, 289/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, 290/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, 291/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, 292/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, 293/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, 294/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, 295/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, 296}; 297 298static const struct inst db_inst_0fax[] = { 299/*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, 300/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, 301/*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, 302/*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 }, 303/*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 }, 304/*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 }, 305/*a6*/ { "", FALSE, NONE, 0, 0 }, 306/*a7*/ { "", FALSE, NONE, 0, 0 }, 307 308/*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, 309/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, 310/*aa*/ { "rsm", FALSE, NONE, 0, 0 }, 311/*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 }, 312/*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 }, 313/*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 }, 314/*ae*/ { "", TRUE, LONG, op1(E), db_Grp15 }, 315/*af*/ { "imul", TRUE, LONG, op2(E,R), 0 }, 316}; 317 318static const struct inst db_inst_0fbx[] = { 319/*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, 320/*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, 321/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, 322/*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 }, 323/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, 324/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, 325/*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 }, 326/*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 }, 327 328/*b8*/ { "", FALSE, NONE, 0, 0 }, 329/*b9*/ { "", FALSE, NONE, 0, 0 }, 330/*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 }, 331/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, 332/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, 333/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, 334/*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 }, 335/*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 }, 336}; 337 338static const struct inst db_inst_0fcx[] = { 339/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, 340/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, 341/*c2*/ { "", FALSE, NONE, 0, 0 }, 342/*c3*/ { "", FALSE, NONE, 0, 0 }, 343/*c4*/ { "", FALSE, NONE, 0, 0 }, 344/*c5*/ { "", FALSE, NONE, 0, 0 }, 345/*c6*/ { "", FALSE, NONE, 0, 0 }, 346/*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 }, 347/*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 348/*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 349/*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 350/*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 351/*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 352/*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 353/*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 354/*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 355}; 356 357static const struct inst * const db_inst_0f[] = { 358 db_inst_0f0x, 359 0, 360 db_inst_0f2x, 361 db_inst_0f3x, 362 db_inst_0f4x, 363 0, 364 0, 365 0, 366 db_inst_0f8x, 367 db_inst_0f9x, 368 db_inst_0fax, 369 db_inst_0fbx, 370 db_inst_0fcx, 371 0, 372 0, 373 0 374}; 375 376static const char * const db_Esc92[] = { 377 "fnop", "", "", "", "", "", "", "" 378}; 379static const char * const db_Esc94[] = { 380 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 381}; 382static const char * const db_Esc95[] = { 383 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 384}; 385static const char * const db_Esc96[] = { 386 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 387 "fincstp" 388}; 389static const char * const db_Esc97[] = { 390 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 391}; 392 393static const char * const db_Esca5[] = { 394 "", "fucompp","", "", "", "", "", "" 395}; 396 397static const char * const db_Escb4[] = { 398 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", "" 399}; 400 401static const char * const db_Esce3[] = { 402 "", "fcompp","", "", "", "", "", "" 403}; 404 405static const char * const db_Escf4[] = { 406 "fnstsw","", "", "", "", "", "", "" 407}; 408 409static const struct finst db_Esc8[] = { 410/*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 411/*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 412/*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 413/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 414/*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 415/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 416/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 417/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 418}; 419 420static const struct finst db_Esc9[] = { 421/*0*/ { "fld", SNGL, op1(STI), 0 }, 422/*1*/ { "", NONE, op1(STI), "fxch" }, 423/*2*/ { "fst", SNGL, op1(X), db_Esc92 }, 424/*3*/ { "fstp", SNGL, 0, 0 }, 425/*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, 426/*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, 427/*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, 428/*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, 429}; 430 431static const struct finst db_Esca[] = { 432/*0*/ { "fiadd", LONG, 0, 0 }, 433/*1*/ { "fimul", LONG, 0, 0 }, 434/*2*/ { "ficom", LONG, 0, 0 }, 435/*3*/ { "ficomp", LONG, 0, 0 }, 436/*4*/ { "fisub", LONG, 0, 0 }, 437/*5*/ { "fisubr", LONG, op1(X), db_Esca5 }, 438/*6*/ { "fidiv", LONG, 0, 0 }, 439/*7*/ { "fidivr", LONG, 0, 0 } 440}; 441 442static const struct finst db_Escb[] = { 443/*0*/ { "fild", LONG, 0, 0 }, 444/*1*/ { "", NONE, 0, 0 }, 445/*2*/ { "fist", LONG, 0, 0 }, 446/*3*/ { "fistp", LONG, 0, 0 }, 447/*4*/ { "", WORD, op1(X), db_Escb4 }, 448/*5*/ { "fld", EXTR, 0, 0 }, 449/*6*/ { "", WORD, 0, 0 }, 450/*7*/ { "fstp", EXTR, 0, 0 }, 451}; 452 453static const struct finst db_Escc[] = { 454/*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 455/*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 456/*2*/ { "fcom", DBLR, 0, 0 }, 457/*3*/ { "fcomp", DBLR, 0, 0 }, 458/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 459/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 460/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 461/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 462}; 463 464static const struct finst db_Escd[] = { 465/*0*/ { "fld", DBLR, op1(STI), "ffree" }, 466/*1*/ { "", NONE, 0, 0 }, 467/*2*/ { "fst", DBLR, op1(STI), 0 }, 468/*3*/ { "fstp", DBLR, op1(STI), 0 }, 469/*4*/ { "frstor", NONE, op1(STI), "fucom" }, 470/*5*/ { "", NONE, op1(STI), "fucomp" }, 471/*6*/ { "fnsave", NONE, 0, 0 }, 472/*7*/ { "fnstsw", NONE, 0, 0 }, 473}; 474 475static const struct finst db_Esce[] = { 476/*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" }, 477/*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" }, 478/*2*/ { "ficom", WORD, 0, 0 }, 479/*3*/ { "ficomp", WORD, op1(X), db_Esce3 }, 480/*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" }, 481/*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" }, 482/*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" }, 483/*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" }, 484}; 485 486static const struct finst db_Escf[] = { 487/*0*/ { "fild", WORD, 0, 0 }, 488/*1*/ { "", NONE, 0, 0 }, 489/*2*/ { "fist", WORD, 0, 0 }, 490/*3*/ { "fistp", WORD, 0, 0 }, 491/*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, 492/*5*/ { "fild", QUAD, 0, 0 }, 493/*6*/ { "fbstp", NONE, 0, 0 }, 494/*7*/ { "fistp", QUAD, 0, 0 }, 495}; 496 497static const struct finst * const db_Esc_inst[] = { 498 db_Esc8, db_Esc9, db_Esca, db_Escb, 499 db_Escc, db_Escd, db_Esce, db_Escf 500}; 501 502static const char * const db_Grp1[] = { 503 "add", 504 "or", 505 "adc", 506 "sbb", 507 "and", 508 "sub", 509 "xor", 510 "cmp" 511}; 512 513static const char * const db_Grp2[] = { 514 "rol", 515 "ror", 516 "rcl", 517 "rcr", 518 "shl", 519 "shr", 520 "shl", 521 "sar" 522}; 523 524static const struct inst db_Grp3[] = { 525 { "test", TRUE, NONE, op2(I,E), 0 }, 526 { "test", TRUE, NONE, op2(I,E), 0 }, 527 { "not", TRUE, NONE, op1(E), 0 }, 528 { "neg", TRUE, NONE, op1(E), 0 }, 529 { "mul", TRUE, NONE, op2(E,A), 0 }, 530 { "imul", TRUE, NONE, op2(E,A), 0 }, 531 { "div", TRUE, NONE, op2(E,A), 0 }, 532 { "idiv", TRUE, NONE, op2(E,A), 0 }, 533}; 534 535static const struct inst db_Grp4[] = { 536 { "inc", TRUE, BYTE, op1(E), 0 }, 537 { "dec", TRUE, BYTE, op1(E), 0 }, 538 { "", TRUE, NONE, 0, 0 }, 539 { "", TRUE, NONE, 0, 0 }, 540 { "", TRUE, NONE, 0, 0 }, 541 { "", TRUE, NONE, 0, 0 }, 542 { "", TRUE, NONE, 0, 0 }, 543 { "", TRUE, NONE, 0, 0 } 544}; 545 546static const struct inst db_Grp5[] = { 547 { "inc", TRUE, LONG, op1(E), 0 }, 548 { "dec", TRUE, LONG, op1(E), 0 }, 549 { "call", TRUE, LONG, op1(Eind),0 }, 550 { "lcall", TRUE, LONG, op1(Eind),0 }, 551 { "jmp", TRUE, LONG, op1(Eind),0 }, 552 { "ljmp", TRUE, LONG, op1(Eind),0 }, 553 { "push", TRUE, LONG, op1(E), 0 }, 554 { "", TRUE, NONE, 0, 0 } 555}; 556 557static const struct inst db_inst_table[256] = { 558/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, 559/*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, 560/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, 561/*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, 562/*04*/ { "add", FALSE, BYTE, op2(I, A), 0 }, 563/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, 564/*06*/ { "push", FALSE, NONE, op1(Si), 0 }, 565/*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, 566 567/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, 568/*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, 569/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, 570/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, 571/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, 572/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, 573/*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, 574/*0f*/ { "", FALSE, NONE, 0, 0 }, 575 576/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, 577/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, 578/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, 579/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, 580/*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 }, 581/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, 582/*16*/ { "push", FALSE, NONE, op1(Si), 0 }, 583/*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, 584 585/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, 586/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, 587/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, 588/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, 589/*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 }, 590/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, 591/*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, 592/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, 593 594/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, 595/*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, 596/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, 597/*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, 598/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, 599/*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, 600/*26*/ { "", FALSE, NONE, 0, 0 }, 601/*27*/ { "daa", FALSE, NONE, 0, 0 }, 602 603/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, 604/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, 605/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, 606/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, 607/*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 }, 608/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, 609/*2e*/ { "", FALSE, NONE, 0, 0 }, 610/*2f*/ { "das", FALSE, NONE, 0, 0 }, 611 612/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, 613/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, 614/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, 615/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, 616/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, 617/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, 618/*36*/ { "", FALSE, NONE, 0, 0 }, 619/*37*/ { "aaa", FALSE, NONE, 0, 0 }, 620 621/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, 622/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, 623/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, 624/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, 625/*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 }, 626/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, 627/*3e*/ { "", FALSE, NONE, 0, 0 }, 628/*3f*/ { "aas", FALSE, NONE, 0, 0 }, 629 630/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 631/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 632/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 633/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 634/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 635/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 636/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 637/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 638 639/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 640/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 641/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 642/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 643/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 644/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 645/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 646/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 647 648/*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, 649/*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, 650/*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, 651/*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, 652/*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, 653/*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, 654/*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, 655/*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, 656 657/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 658/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 659/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 660/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 661/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 662/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 663/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 664/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 665 666/*60*/ { "pusha", FALSE, LONG, 0, 0 }, 667/*61*/ { "popa", FALSE, LONG, 0, 0 }, 668/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, 669/*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 }, 670 671/*64*/ { "", FALSE, NONE, 0, 0 }, 672/*65*/ { "", FALSE, NONE, 0, 0 }, 673/*66*/ { "", FALSE, NONE, 0, 0 }, 674/*67*/ { "", FALSE, NONE, 0, 0 }, 675 676/*68*/ { "push", FALSE, LONG, op1(I), 0 }, 677/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, 678/*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 }, 679/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, 680/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, 681/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, 682/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, 683/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, 684 685/*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, 686/*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, 687/*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, 688/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, 689/*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, 690/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, 691/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, 692/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, 693 694/*78*/ { "js", FALSE, NONE, op1(Db), 0 }, 695/*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, 696/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, 697/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, 698/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, 699/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, 700/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, 701/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, 702 703/*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 704/*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 }, 705/*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 706/*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 }, 707/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, 708/*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, 709/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, 710/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, 711 712/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, 713/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, 714/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, 715/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, 716/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, 717/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, 718/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, 719/*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, 720 721/*90*/ { "nop", FALSE, NONE, 0, 0 }, 722/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 723/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 724/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 725/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 726/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 727/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 728/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 729 730/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ 731/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ 732/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, 733/*9b*/ { "wait", FALSE, NONE, 0, 0 }, 734/*9c*/ { "pushf", FALSE, LONG, 0, 0 }, 735/*9d*/ { "popf", FALSE, LONG, 0, 0 }, 736/*9e*/ { "sahf", FALSE, NONE, 0, 0 }, 737/*9f*/ { "lahf", FALSE, NONE, 0, 0 }, 738 739/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, 740/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, 741/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, 742/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, 743/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, 744/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, 745/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, 746/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, 747 748/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, 749/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, 750/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, 751/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, 752/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, 753/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, 754/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, 755/*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, 756 757/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 758/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 759/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 760/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 761/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 762/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 763/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 764/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 765 766/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 767/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 768/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 769/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 770/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 771/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 772/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 773/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 774 775/*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 }, 776/*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 }, 777/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, 778/*c3*/ { "ret", FALSE, NONE, 0, 0 }, 779/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, 780/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, 781/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, 782/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, 783 784/*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 }, 785/*c9*/ { "leave", FALSE, NONE, 0, 0 }, 786/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, 787/*cb*/ { "lret", FALSE, NONE, 0, 0 }, 788/*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, 789/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, 790/*ce*/ { "into", FALSE, NONE, 0, 0 }, 791/*cf*/ { "iret", FALSE, NONE, 0, 0 }, 792 793/*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 }, 794/*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 }, 795/*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 }, 796/*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 }, 797/*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 }, 798/*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 }, 799/*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 }, 800/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, 801 802/*d8*/ { "", TRUE, NONE, 0, db_Esc8 }, 803/*d9*/ { "", TRUE, NONE, 0, db_Esc9 }, 804/*da*/ { "", TRUE, NONE, 0, db_Esca }, 805/*db*/ { "", TRUE, NONE, 0, db_Escb }, 806/*dc*/ { "", TRUE, NONE, 0, db_Escc }, 807/*dd*/ { "", TRUE, NONE, 0, db_Escd }, 808/*de*/ { "", TRUE, NONE, 0, db_Esce }, 809/*df*/ { "", TRUE, NONE, 0, db_Escf }, 810 811/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, 812/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, 813/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, 814/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, 815/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, 816/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, 817/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, 818/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, 819 820/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, 821/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, 822/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, 823/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, 824/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, 825/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, 826/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, 827/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, 828 829/*f0*/ { "", FALSE, NONE, 0, 0 }, 830/*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 }, 831/*f2*/ { "", FALSE, NONE, 0, 0 }, 832/*f3*/ { "", FALSE, NONE, 0, 0 }, 833/*f4*/ { "hlt", FALSE, NONE, 0, 0 }, 834/*f5*/ { "cmc", FALSE, NONE, 0, 0 }, 835/*f6*/ { "", TRUE, BYTE, 0, db_Grp3 }, 836/*f7*/ { "", TRUE, LONG, 0, db_Grp3 }, 837 838/*f8*/ { "clc", FALSE, NONE, 0, 0 }, 839/*f9*/ { "stc", FALSE, NONE, 0, 0 }, 840/*fa*/ { "cli", FALSE, NONE, 0, 0 }, 841/*fb*/ { "sti", FALSE, NONE, 0, 0 }, 842/*fc*/ { "cld", FALSE, NONE, 0, 0 }, 843/*fd*/ { "std", FALSE, NONE, 0, 0 }, 844/*fe*/ { "", TRUE, NONE, 0, db_Grp4 }, 845/*ff*/ { "", TRUE, NONE, 0, db_Grp5 }, 846}; 847 848static const struct inst db_bad_inst = 849 { "???", FALSE, NONE, 0, 0 } 850; 851 852#define f_mod(byte) ((byte)>>6) 853#define f_reg(byte) (((byte)>>3)&0x7) 854#define f_rm(byte) ((byte)&0x7) 855 856#define sib_ss(byte) ((byte)>>6) 857#define sib_index(byte) (((byte)>>3)&0x7) 858#define sib_base(byte) ((byte)&0x7) 859 860struct i_addr { 861 int is_reg; /* if reg, reg number is in 'disp' */ 862 int disp; 863 const char * base; 864 const char * index; 865 int ss; 866}; 867 868static const char * const db_index_reg_16[8] = { 869 "%bx,%si", 870 "%bx,%di", 871 "%bp,%si", 872 "%bp,%di", 873 "%si", 874 "%di", 875 "%bp", 876 "%bx" 877}; 878 879static const char * const db_reg[3][8] = { 880 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, 881 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, 882 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } 883}; 884 885static const char * const db_seg_reg[8] = { 886 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 887}; 888 889/* 890 * lengths for size attributes 891 */ 892static const int db_lengths[] = { 893 1, /* BYTE */ 894 2, /* WORD */ 895 4, /* LONG */ 896 8, /* QUAD */ 897 4, /* SNGL */ 898 8, /* DBLR */ 899 10, /* EXTR */ 900}; 901 902#define get_value_inc(result, loc, size, is_signed) \ 903 result = db_get_value((loc), (size), (is_signed)); \ 904 (loc) += (size); 905 906static db_addr_t 907 db_disasm_esc(db_addr_t loc, int inst, int short_addr, 908 int size, const char *seg); 909static void db_print_address(const char *seg, int size, 910 struct i_addr *addrp); 911static db_addr_t 912 db_read_address(db_addr_t loc, int short_addr, int regmodrm, 913 struct i_addr *addrp); 914 915/* 916 * Read address at location and return updated location. 917 */ 918static db_addr_t 919db_read_address(loc, short_addr, regmodrm, addrp) 920 db_addr_t loc; 921 int short_addr; 922 int regmodrm; 923 struct i_addr * addrp; /* out */ 924{ 925 int mod, rm, sib, index, disp; 926 927 mod = f_mod(regmodrm); 928 rm = f_rm(regmodrm); 929 930 if (mod == 3) { 931 addrp->is_reg = TRUE; 932 addrp->disp = rm; 933 return (loc); 934 } 935 addrp->is_reg = FALSE; 936 addrp->index = 0; 937 938 if (short_addr) { 939 addrp->index = 0; 940 addrp->ss = 0; 941 switch (mod) { 942 case 0: 943 if (rm == 6) { 944 get_value_inc(disp, loc, 2, FALSE); 945 addrp->disp = disp; 946 addrp->base = 0; 947 } 948 else { 949 addrp->disp = 0; 950 addrp->base = db_index_reg_16[rm]; 951 } 952 break; 953 case 1: 954 get_value_inc(disp, loc, 1, TRUE); 955 disp &= 0xFFFF; 956 addrp->disp = disp; 957 addrp->base = db_index_reg_16[rm]; 958 break; 959 case 2: 960 get_value_inc(disp, loc, 2, FALSE); 961 addrp->disp = disp; 962 addrp->base = db_index_reg_16[rm]; 963 break; 964 } 965 } 966 else { 967 if (mod != 3 && rm == 4) { 968 get_value_inc(sib, loc, 1, FALSE); 969 rm = sib_base(sib); 970 index = sib_index(sib); 971 if (index != 4) 972 addrp->index = db_reg[LONG][index]; 973 addrp->ss = sib_ss(sib); 974 } 975 976 switch (mod) { 977 case 0: 978 if (rm == 5) { 979 get_value_inc(addrp->disp, loc, 4, FALSE); 980 addrp->base = 0; 981 } 982 else { 983 addrp->disp = 0; 984 addrp->base = db_reg[LONG][rm]; 985 } 986 break; 987 988 case 1: 989 get_value_inc(disp, loc, 1, TRUE); 990 addrp->disp = disp; 991 addrp->base = db_reg[LONG][rm]; 992 break; 993 994 case 2: 995 get_value_inc(disp, loc, 4, FALSE); 996 addrp->disp = disp; 997 addrp->base = db_reg[LONG][rm]; 998 break; 999 } 1000 } 1001 return (loc); 1002} 1003 1004static void 1005db_print_address(seg, size, addrp) 1006 const char * seg; 1007 int size; 1008 struct i_addr * addrp; 1009{ 1010 if (addrp->is_reg) { 1011 db_printf("%s", db_reg[size][addrp->disp]); 1012 return; 1013 } 1014 1015 if (seg) { 1016 db_printf("%s:", seg); 1017 } 1018 1019 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY); 1020 if (addrp->base != 0 || addrp->index != 0) { 1021 db_printf("("); 1022 if (addrp->base) 1023 db_printf("%s", addrp->base); 1024 if (addrp->index) 1025 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 1026 db_printf(")"); 1027 } 1028} 1029 1030/* 1031 * Disassemble floating-point ("escape") instruction 1032 * and return updated location. 1033 */ 1034static db_addr_t 1035db_disasm_esc(loc, inst, short_addr, size, seg) 1036 db_addr_t loc; 1037 int inst; 1038 int short_addr; 1039 int size; 1040 const char * seg; 1041{ 1042 int regmodrm; 1043 const struct finst * fp; 1044 int mod; 1045 struct i_addr address; 1046 const char * name; 1047 1048 get_value_inc(regmodrm, loc, 1, FALSE); 1049 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 1050 mod = f_mod(regmodrm); 1051 if (mod != 3) { 1052 if (*fp->f_name == '\0') { 1053 db_printf("<bad instruction>"); 1054 return (loc); 1055 } 1056 /* 1057 * Normal address modes. 1058 */ 1059 loc = db_read_address(loc, short_addr, regmodrm, &address); 1060 db_printf("%s", fp->f_name); 1061 switch(fp->f_size) { 1062 case SNGL: 1063 db_printf("s"); 1064 break; 1065 case DBLR: 1066 db_printf("l"); 1067 break; 1068 case EXTR: 1069 db_printf("t"); 1070 break; 1071 case WORD: 1072 db_printf("s"); 1073 break; 1074 case LONG: 1075 db_printf("l"); 1076 break; 1077 case QUAD: 1078 db_printf("q"); 1079 break; 1080 default: 1081 break; 1082 } 1083 db_printf("\t"); 1084 db_print_address(seg, BYTE, &address); 1085 } 1086 else { 1087 /* 1088 * 'reg-reg' - special formats 1089 */ 1090 switch (fp->f_rrmode) { 1091 case op2(ST,STI): 1092 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1093 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1094 break; 1095 case op2(STI,ST): 1096 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1097 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1098 break; 1099 case op1(STI): 1100 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1101 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1102 break; 1103 case op1(X): 1104 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1105 if (*name == '\0') 1106 goto bad; 1107 db_printf("%s", name); 1108 break; 1109 case op1(XA): 1110 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1111 if (*name == '\0') 1112 goto bad; 1113 db_printf("%s\t%%ax", name); 1114 break; 1115 default: 1116 bad: 1117 db_printf("<bad instruction>"); 1118 break; 1119 } 1120 } 1121 1122 return (loc); 1123} 1124 1125/* 1126 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1127 * (optional) alternate format. Return address of start of 1128 * next instruction. 1129 */ 1130db_addr_t 1131db_disasm(loc, altfmt) 1132 db_addr_t loc; 1133 boolean_t altfmt; 1134{ 1135 int inst; 1136 int size; 1137 int short_addr; 1138 const char * seg; 1139 const struct inst * ip; 1140 const char * i_name; 1141 int i_size; 1142 int i_mode; 1143 int regmodrm = 0; 1144 boolean_t first; 1145 int displ; 1146 int prefix; 1147 int rep; 1148 int imm; 1149 int imm2; 1150 int len; 1151 struct i_addr address; 1152 1153 get_value_inc(inst, loc, 1, FALSE); 1154 short_addr = FALSE; 1155 size = LONG; 1156 seg = 0; 1157 1158 /* 1159 * Get prefixes 1160 */ 1161 rep = FALSE; 1162 prefix = TRUE; 1163 do { 1164 switch (inst) { 1165 case 0x66: /* data16 */ 1166 size = WORD; 1167 break; 1168 case 0x67: 1169 short_addr = TRUE; 1170 break; 1171 case 0x26: 1172 seg = "%es"; 1173 break; 1174 case 0x36: 1175 seg = "%ss"; 1176 break; 1177 case 0x2e: 1178 seg = "%cs"; 1179 break; 1180 case 0x3e: 1181 seg = "%ds"; 1182 break; 1183 case 0x64: 1184 seg = "%fs"; 1185 break; 1186 case 0x65: 1187 seg = "%gs"; 1188 break; 1189 case 0xf0: 1190 db_printf("lock "); 1191 break; 1192 case 0xf2: 1193 db_printf("repne "); 1194 break; 1195 case 0xf3: 1196 rep = TRUE; 1197 break; 1198 default: 1199 prefix = FALSE; 1200 break; 1201 } 1202 if (prefix) { 1203 get_value_inc(inst, loc, 1, FALSE); 1204 } 1205 if (rep == TRUE) { 1206 if (inst == 0x90) { 1207 db_printf("pause\n"); 1208 return (loc); 1209 } 1210 db_printf("repe "); /* XXX repe VS rep */ 1211 rep = FALSE; 1212 } 1213 } while (prefix); 1214 1215 if (inst >= 0xd8 && inst <= 0xdf) { 1216 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1217 db_printf("\n"); 1218 return (loc); 1219 } 1220 1221 if (inst == 0x0f) { 1222 get_value_inc(inst, loc, 1, FALSE); 1223 ip = db_inst_0f[inst>>4]; 1224 if (ip == 0) { 1225 ip = &db_bad_inst; 1226 } 1227 else { 1228 ip = &ip[inst&0xf]; 1229 } 1230 } 1231 else 1232 ip = &db_inst_table[inst]; 1233 1234 if (ip->i_has_modrm) { 1235 get_value_inc(regmodrm, loc, 1, FALSE); 1236 loc = db_read_address(loc, short_addr, regmodrm, &address); 1237 } 1238 1239 i_name = ip->i_name; 1240 i_size = ip->i_size; 1241 i_mode = ip->i_mode; 1242 1243 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 || 1244 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 || 1245 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 || 1246 ip->i_extra == db_Grp15) { 1247 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)]; 1248 } 1249 else if (ip->i_extra == db_Grp3) { 1250 ip = ip->i_extra; 1251 ip = &ip[f_reg(regmodrm)]; 1252 i_name = ip->i_name; 1253 i_mode = ip->i_mode; 1254 } 1255 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) { 1256 ip = ip->i_extra; 1257 ip = &ip[f_reg(regmodrm)]; 1258 i_name = ip->i_name; 1259 i_mode = ip->i_mode; 1260 i_size = ip->i_size; 1261 } 1262 1263 /* Special cases that don't fit well in the tables. */ 1264 if (ip->i_extra == db_Grp7 && f_mod(regmodrm) == 3) { 1265 switch (regmodrm) { 1266 case 0xc8: 1267 i_name = "monitor"; 1268 i_size = NONE; 1269 i_mode = 0; 1270 break; 1271 case 0xc9: 1272 i_name = "mwait"; 1273 i_size = NONE; 1274 i_mode = 0; 1275 break; 1276 } 1277 } 1278 if (ip->i_extra == db_Grp15 && f_mod(regmodrm) == 3) { 1279 i_name = db_Grp15b[f_reg(regmodrm)]; 1280 i_size = NONE; 1281 i_mode = 0; 1282 } 1283 1284 if (i_size == SDEP) { 1285 if (size == WORD) 1286 db_printf("%s", i_name); 1287 else 1288 db_printf("%s", (const char *)ip->i_extra); 1289 } 1290 else { 1291 db_printf("%s", i_name); 1292 if (i_size != NONE) { 1293 if (i_size == BYTE) { 1294 db_printf("b"); 1295 size = BYTE; 1296 } 1297 else if (i_size == WORD) { 1298 db_printf("w"); 1299 size = WORD; 1300 } 1301 else if (size == WORD) 1302 db_printf("w"); 1303 else 1304 db_printf("l"); 1305 } 1306 } 1307 db_printf("\t"); 1308 for (first = TRUE; 1309 i_mode != 0; 1310 i_mode >>= 8, first = FALSE) 1311 { 1312 if (!first) 1313 db_printf(","); 1314 1315 switch (i_mode & 0xFF) { 1316 1317 case E: 1318 db_print_address(seg, size, &address); 1319 break; 1320 1321 case Eind: 1322 db_printf("*"); 1323 db_print_address(seg, size, &address); 1324 break; 1325 1326 case El: 1327 db_print_address(seg, LONG, &address); 1328 break; 1329 1330 case Ew: 1331 db_print_address(seg, WORD, &address); 1332 break; 1333 1334 case Eb: 1335 db_print_address(seg, BYTE, &address); 1336 break; 1337 1338 case R: 1339 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1340 break; 1341 1342 case Rw: 1343 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1344 break; 1345 1346 case Ri: 1347 db_printf("%s", db_reg[size][f_rm(inst)]); 1348 break; 1349 1350 case Ril: 1351 db_printf("%s", db_reg[LONG][f_rm(inst)]); 1352 break; 1353 1354 case S: 1355 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1356 break; 1357 1358 case Si: 1359 db_printf("%s", db_seg_reg[f_reg(inst)]); 1360 break; 1361 1362 case A: 1363 db_printf("%s", db_reg[size][0]); /* acc */ 1364 break; 1365 1366 case BX: 1367 if (seg) 1368 db_printf("%s:", seg); 1369 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1370 break; 1371 1372 case CL: 1373 db_printf("%%cl"); 1374 break; 1375 1376 case DX: 1377 db_printf("%%dx"); 1378 break; 1379 1380 case SI: 1381 if (seg) 1382 db_printf("%s:", seg); 1383 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1384 break; 1385 1386 case DI: 1387 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1388 break; 1389 1390 case CR: 1391 db_printf("%%cr%d", f_reg(regmodrm)); 1392 break; 1393 1394 case DR: 1395 db_printf("%%dr%d", f_reg(regmodrm)); 1396 break; 1397 1398 case TR: 1399 db_printf("%%tr%d", f_reg(regmodrm)); 1400 break; 1401 1402 case I: 1403 len = db_lengths[size]; 1404 get_value_inc(imm, loc, len, FALSE); 1405 db_printf("$%#r", imm); 1406 break; 1407 1408 case Is: 1409 len = db_lengths[size]; 1410 get_value_inc(imm, loc, len, FALSE); 1411 db_printf("$%+#r", imm); 1412 break; 1413 1414 case Ib: 1415 get_value_inc(imm, loc, 1, FALSE); 1416 db_printf("$%#r", imm); 1417 break; 1418 1419 case Iba: 1420 get_value_inc(imm, loc, 1, FALSE); 1421 if (imm != 0x0a) 1422 db_printf("$%#r", imm); 1423 break; 1424 1425 case Ibs: 1426 get_value_inc(imm, loc, 1, TRUE); 1427 if (size == WORD) 1428 imm &= 0xFFFF; 1429 db_printf("$%+#r", imm); 1430 break; 1431 1432 case Iw: 1433 get_value_inc(imm, loc, 2, FALSE); 1434 db_printf("$%#r", imm); 1435 break; 1436 1437 case O: 1438 len = (short_addr ? 2 : 4); 1439 get_value_inc(displ, loc, len, FALSE); 1440 if (seg) 1441 db_printf("%s:%+#r",seg, displ); 1442 else 1443 db_printsym((db_addr_t)displ, DB_STGY_ANY); 1444 break; 1445 1446 case Db: 1447 get_value_inc(displ, loc, 1, TRUE); 1448 displ += loc; 1449 if (size == WORD) 1450 displ &= 0xFFFF; 1451 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1452 break; 1453 1454 case Dl: 1455 len = db_lengths[size]; 1456 get_value_inc(displ, loc, len, FALSE); 1457 displ += loc; 1458 if (size == WORD) 1459 displ &= 0xFFFF; 1460 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1461 break; 1462 1463 case o1: 1464 db_printf("$1"); 1465 break; 1466 1467 case o3: 1468 db_printf("$3"); 1469 break; 1470 1471 case OS: 1472 len = db_lengths[size]; 1473 get_value_inc(imm, loc, len, FALSE); /* offset */ 1474 get_value_inc(imm2, loc, 2, FALSE); /* segment */ 1475 db_printf("$%#r,%#r", imm2, imm); 1476 break; 1477 } 1478 } 1479 db_printf("\n"); 1480 return (loc); 1481} 1482