db_disasm.c revision 308418
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: stable/11/sys/i386/i386/db_disasm.c 308418 2016-11-07 12:10:17Z kib $"); 29 30/* 31 * Instruction disassembler. 32 */ 33#include <sys/param.h> 34#include <sys/kdb.h> 35 36#include <ddb/ddb.h> 37#include <ddb/db_access.h> 38#include <ddb/db_sym.h> 39 40/* 41 * Size attributes 42 */ 43#define BYTE 0 44#define WORD 1 45#define LONG 2 46#define QUAD 3 47#define SNGL 4 48#define DBLR 5 49#define EXTR 6 50#define SDEP 7 51#define NONE 8 52 53/* 54 * Addressing modes 55 */ 56#define E 1 /* general effective address */ 57#define Eind 2 /* indirect address (jump, call) */ 58#define Ew 3 /* address, word size */ 59#define Eb 4 /* address, byte size */ 60#define R 5 /* register, in 'reg' field */ 61#define Rw 6 /* word register, in 'reg' field */ 62#define Ri 7 /* register in instruction */ 63#define S 8 /* segment reg, in 'reg' field */ 64#define Si 9 /* segment reg, in instruction */ 65#define A 10 /* accumulator */ 66#define BX 11 /* (bx) */ 67#define CL 12 /* cl, for shifts */ 68#define DX 13 /* dx, for IO */ 69#define SI 14 /* si */ 70#define DI 15 /* di */ 71#define CR 16 /* control register */ 72#define DR 17 /* debug register */ 73#define TR 18 /* test register */ 74#define I 19 /* immediate, unsigned */ 75#define Is 20 /* immediate, signed */ 76#define Ib 21 /* byte immediate, unsigned */ 77#define Ibs 22 /* byte immediate, signed */ 78#define Iw 23 /* word immediate, unsigned */ 79#define O 25 /* direct address */ 80#define Db 26 /* byte displacement from EIP */ 81#define Dl 27 /* long displacement from EIP */ 82#define o1 28 /* constant 1 */ 83#define o3 29 /* constant 3 */ 84#define OS 30 /* immediate offset/segment */ 85#define ST 31 /* FP stack top */ 86#define STI 32 /* FP stack */ 87#define X 33 /* extended FP op */ 88#define XA 34 /* for 'fstcw %ax' */ 89#define El 35 /* address, long size */ 90#define Ril 36 /* long register in instruction */ 91#define Iba 37 /* byte immediate, don't print if 0xa */ 92 93struct inst { 94 const char * i_name; /* name */ 95 short i_has_modrm; /* has regmodrm byte */ 96 short i_size; /* operand size */ 97 int i_mode; /* addressing modes */ 98 const void * i_extra; /* pointer to extra opcode table */ 99}; 100 101#define op1(x) (x) 102#define op2(x,y) ((x)|((y)<<8)) 103#define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 104 105struct finst { 106 const char * f_name; /* name for memory instruction */ 107 int f_size; /* size for memory instruction */ 108 int f_rrmode; /* mode for rr instruction */ 109 const void * f_rrname; /* name for rr instruction 110 (or pointer to table) */ 111}; 112 113static const char * const db_Grp6[] = { 114 "sldt", 115 "str", 116 "lldt", 117 "ltr", 118 "verr", 119 "verw", 120 "", 121 "" 122}; 123 124static const char * const db_Grp7[] = { 125 "sgdt", 126 "sidt", 127 "lgdt", 128 "lidt", 129 "smsw", 130 "", 131 "lmsw", 132 "invlpg" 133}; 134 135static const char * const db_Grp8[] = { 136 "", 137 "", 138 "", 139 "", 140 "bt", 141 "bts", 142 "btr", 143 "btc" 144}; 145 146static const char * const db_Grp9[] = { 147 "", 148 "cmpxchg8b", 149 "", 150 "", 151 "", 152 "", 153 "", 154 "" 155}; 156 157static const char * const db_Grp15[] = { 158 "fxsave", 159 "fxrstor", 160 "ldmxcsr", 161 "stmxcsr", 162 "", 163 "", 164 "", 165 "clflush" 166}; 167 168static const char * const db_Grp15b[] = { 169 "", 170 "", 171 "", 172 "", 173 "", 174 "lfence", 175 "mfence", 176 "sfence" 177}; 178 179static const struct inst db_inst_0f0x[] = { 180/*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 }, 181/*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 }, 182/*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, 183/*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, 184/*04*/ { "", FALSE, NONE, 0, 0 }, 185/*05*/ { "syscall",FALSE,NONE, 0, 0 }, 186/*06*/ { "clts", FALSE, NONE, 0, 0 }, 187/*07*/ { "sysret",FALSE, NONE, 0, 0 }, 188 189/*08*/ { "invd", FALSE, NONE, 0, 0 }, 190/*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, 191/*0a*/ { "", FALSE, NONE, 0, 0 }, 192/*0b*/ { "", FALSE, NONE, 0, 0 }, 193/*0c*/ { "", FALSE, NONE, 0, 0 }, 194/*0d*/ { "", FALSE, NONE, 0, 0 }, 195/*0e*/ { "", FALSE, NONE, 0, 0 }, 196/*0f*/ { "", FALSE, NONE, 0, 0 }, 197}; 198 199static const struct inst db_inst_0f1x[] = { 200/*10*/ { "", FALSE, NONE, 0, 0 }, 201/*11*/ { "", FALSE, NONE, 0, 0 }, 202/*12*/ { "", FALSE, NONE, 0, 0 }, 203/*13*/ { "", FALSE, NONE, 0, 0 }, 204/*14*/ { "", FALSE, NONE, 0, 0 }, 205/*15*/ { "", FALSE, NONE, 0, 0 }, 206/*16*/ { "", FALSE, NONE, 0, 0 }, 207/*17*/ { "", FALSE, NONE, 0, 0 }, 208 209/*18*/ { "", FALSE, NONE, 0, 0 }, 210/*19*/ { "", FALSE, NONE, 0, 0 }, 211/*1a*/ { "", FALSE, NONE, 0, 0 }, 212/*1b*/ { "", FALSE, NONE, 0, 0 }, 213/*1c*/ { "", FALSE, NONE, 0, 0 }, 214/*1d*/ { "", FALSE, NONE, 0, 0 }, 215/*1e*/ { "", FALSE, NONE, 0, 0 }, 216/*1f*/ { "nopl", TRUE, SDEP, 0, "nopw" }, 217}; 218 219static const struct inst db_inst_0f2x[] = { 220/*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 }, 221/*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 }, 222/*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 }, 223/*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 }, 224/*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 }, 225/*25*/ { "", FALSE, NONE, 0, 0 }, 226/*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 }, 227/*27*/ { "", FALSE, NONE, 0, 0 }, 228 229/*28*/ { "", FALSE, NONE, 0, 0 }, 230/*29*/ { "", FALSE, NONE, 0, 0 }, 231/*2a*/ { "", FALSE, NONE, 0, 0 }, 232/*2b*/ { "", FALSE, NONE, 0, 0 }, 233/*2c*/ { "", FALSE, NONE, 0, 0 }, 234/*2d*/ { "", FALSE, NONE, 0, 0 }, 235/*2e*/ { "", FALSE, NONE, 0, 0 }, 236/*2f*/ { "", FALSE, NONE, 0, 0 }, 237}; 238 239static const struct inst db_inst_0f3x[] = { 240/*30*/ { "wrmsr", FALSE, NONE, 0, 0 }, 241/*31*/ { "rdtsc", FALSE, NONE, 0, 0 }, 242/*32*/ { "rdmsr", FALSE, NONE, 0, 0 }, 243/*33*/ { "rdpmc", FALSE, NONE, 0, 0 }, 244/*34*/ { "sysenter",FALSE,NONE, 0, 0 }, 245/*35*/ { "sysexit",FALSE,NONE, 0, 0 }, 246/*36*/ { "", FALSE, NONE, 0, 0 }, 247/*37*/ { "getsec",FALSE, NONE, 0, 0 }, 248 249/*38*/ { "", FALSE, NONE, 0, 0 }, 250/*39*/ { "", FALSE, NONE, 0, 0 }, 251/*3a*/ { "", FALSE, NONE, 0, 0 }, 252/*3b*/ { "", FALSE, NONE, 0, 0 }, 253/*3c*/ { "", FALSE, NONE, 0, 0 }, 254/*3d*/ { "", FALSE, NONE, 0, 0 }, 255/*3e*/ { "", FALSE, NONE, 0, 0 }, 256/*3f*/ { "", FALSE, NONE, 0, 0 }, 257}; 258 259static const struct inst db_inst_0f4x[] = { 260/*40*/ { "cmovo", TRUE, NONE, op2(E, R), 0 }, 261/*41*/ { "cmovno", TRUE, NONE, op2(E, R), 0 }, 262/*42*/ { "cmovb", TRUE, NONE, op2(E, R), 0 }, 263/*43*/ { "cmovnb", TRUE, NONE, op2(E, R), 0 }, 264/*44*/ { "cmovz", TRUE, NONE, op2(E, R), 0 }, 265/*45*/ { "cmovnz", TRUE, NONE, op2(E, R), 0 }, 266/*46*/ { "cmovbe", TRUE, NONE, op2(E, R), 0 }, 267/*47*/ { "cmovnbe",TRUE, NONE, op2(E, R), 0 }, 268 269/*48*/ { "cmovs", TRUE, NONE, op2(E, R), 0 }, 270/*49*/ { "cmovns", TRUE, NONE, op2(E, R), 0 }, 271/*4a*/ { "cmovp", TRUE, NONE, op2(E, R), 0 }, 272/*4b*/ { "cmovnp", TRUE, NONE, op2(E, R), 0 }, 273/*4c*/ { "cmovl", TRUE, NONE, op2(E, R), 0 }, 274/*4d*/ { "cmovnl", TRUE, NONE, op2(E, R), 0 }, 275/*4e*/ { "cmovle", TRUE, NONE, op2(E, R), 0 }, 276/*4f*/ { "cmovnle",TRUE, NONE, op2(E, R), 0 }, 277}; 278 279static const struct inst db_inst_0f8x[] = { 280/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, 281/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, 282/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, 283/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, 284/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, 285/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, 286/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, 287/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, 288 289/*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, 290/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, 291/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, 292/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, 293/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, 294/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, 295/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, 296/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, 297}; 298 299static const struct inst db_inst_0f9x[] = { 300/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, 301/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, 302/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, 303/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, 304/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, 305/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, 306/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, 307/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, 308 309/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, 310/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, 311/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, 312/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, 313/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, 314/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, 315/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, 316/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, 317}; 318 319static const struct inst db_inst_0fax[] = { 320/*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, 321/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, 322/*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, 323/*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 }, 324/*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 }, 325/*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 }, 326/*a6*/ { "", FALSE, NONE, 0, 0 }, 327/*a7*/ { "", FALSE, NONE, 0, 0 }, 328 329/*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, 330/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, 331/*aa*/ { "rsm", FALSE, NONE, 0, 0 }, 332/*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 }, 333/*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 }, 334/*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 }, 335/*ae*/ { "", TRUE, LONG, op1(E), db_Grp15 }, 336/*af*/ { "imul", TRUE, LONG, op2(E,R), 0 }, 337}; 338 339static const struct inst db_inst_0fbx[] = { 340/*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, 341/*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, 342/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, 343/*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 }, 344/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, 345/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, 346/*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 }, 347/*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 }, 348 349/*b8*/ { "", FALSE, NONE, 0, 0 }, 350/*b9*/ { "", FALSE, NONE, 0, 0 }, 351/*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 }, 352/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, 353/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, 354/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, 355/*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 }, 356/*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 }, 357}; 358 359static const struct inst db_inst_0fcx[] = { 360/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, 361/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, 362/*c2*/ { "", FALSE, NONE, 0, 0 }, 363/*c3*/ { "", FALSE, NONE, 0, 0 }, 364/*c4*/ { "", FALSE, NONE, 0, 0 }, 365/*c5*/ { "", FALSE, NONE, 0, 0 }, 366/*c6*/ { "", FALSE, NONE, 0, 0 }, 367/*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 }, 368/*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 369/*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 370/*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 371/*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 372/*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 373/*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 374/*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 375/*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 376}; 377 378static const struct inst * const db_inst_0f[] = { 379 db_inst_0f0x, 380 db_inst_0f1x, 381 db_inst_0f2x, 382 db_inst_0f3x, 383 db_inst_0f4x, 384 0, 385 0, 386 0, 387 db_inst_0f8x, 388 db_inst_0f9x, 389 db_inst_0fax, 390 db_inst_0fbx, 391 db_inst_0fcx, 392 0, 393 0, 394 0 395}; 396 397static const char * const db_Esc92[] = { 398 "fnop", "", "", "", "", "", "", "" 399}; 400static const char * const db_Esc94[] = { 401 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 402}; 403static const char * const db_Esc95[] = { 404 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 405}; 406static const char * const db_Esc96[] = { 407 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 408 "fincstp" 409}; 410static const char * const db_Esc97[] = { 411 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 412}; 413 414static const char * const db_Esca5[] = { 415 "", "fucompp","", "", "", "", "", "" 416}; 417 418static const char * const db_Escb4[] = { 419 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", "" 420}; 421 422static const char * const db_Esce3[] = { 423 "", "fcompp","", "", "", "", "", "" 424}; 425 426static const char * const db_Escf4[] = { 427 "fnstsw","", "", "", "", "", "", "" 428}; 429 430static const struct finst db_Esc8[] = { 431/*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 432/*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 433/*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 434/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 435/*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 436/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 437/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 438/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 439}; 440 441static const struct finst db_Esc9[] = { 442/*0*/ { "fld", SNGL, op1(STI), 0 }, 443/*1*/ { "", NONE, op1(STI), "fxch" }, 444/*2*/ { "fst", SNGL, op1(X), db_Esc92 }, 445/*3*/ { "fstp", SNGL, 0, 0 }, 446/*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, 447/*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, 448/*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, 449/*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, 450}; 451 452static const struct finst db_Esca[] = { 453/*0*/ { "fiadd", LONG, 0, 0 }, 454/*1*/ { "fimul", LONG, 0, 0 }, 455/*2*/ { "ficom", LONG, 0, 0 }, 456/*3*/ { "ficomp", LONG, 0, 0 }, 457/*4*/ { "fisub", LONG, 0, 0 }, 458/*5*/ { "fisubr", LONG, op1(X), db_Esca5 }, 459/*6*/ { "fidiv", LONG, 0, 0 }, 460/*7*/ { "fidivr", LONG, 0, 0 } 461}; 462 463static const struct finst db_Escb[] = { 464/*0*/ { "fild", LONG, 0, 0 }, 465/*1*/ { "", NONE, 0, 0 }, 466/*2*/ { "fist", LONG, 0, 0 }, 467/*3*/ { "fistp", LONG, 0, 0 }, 468/*4*/ { "", WORD, op1(X), db_Escb4 }, 469/*5*/ { "fld", EXTR, 0, 0 }, 470/*6*/ { "", WORD, 0, 0 }, 471/*7*/ { "fstp", EXTR, 0, 0 }, 472}; 473 474static const struct finst db_Escc[] = { 475/*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 476/*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 477/*2*/ { "fcom", DBLR, 0, 0 }, 478/*3*/ { "fcomp", DBLR, 0, 0 }, 479/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 480/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 481/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 482/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 483}; 484 485static const struct finst db_Escd[] = { 486/*0*/ { "fld", DBLR, op1(STI), "ffree" }, 487/*1*/ { "", NONE, 0, 0 }, 488/*2*/ { "fst", DBLR, op1(STI), 0 }, 489/*3*/ { "fstp", DBLR, op1(STI), 0 }, 490/*4*/ { "frstor", NONE, op1(STI), "fucom" }, 491/*5*/ { "", NONE, op1(STI), "fucomp" }, 492/*6*/ { "fnsave", NONE, 0, 0 }, 493/*7*/ { "fnstsw", NONE, 0, 0 }, 494}; 495 496static const struct finst db_Esce[] = { 497/*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" }, 498/*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" }, 499/*2*/ { "ficom", WORD, 0, 0 }, 500/*3*/ { "ficomp", WORD, op1(X), db_Esce3 }, 501/*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" }, 502/*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" }, 503/*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" }, 504/*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" }, 505}; 506 507static const struct finst db_Escf[] = { 508/*0*/ { "fild", WORD, 0, 0 }, 509/*1*/ { "", NONE, 0, 0 }, 510/*2*/ { "fist", WORD, 0, 0 }, 511/*3*/ { "fistp", WORD, 0, 0 }, 512/*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, 513/*5*/ { "fild", QUAD, 0, 0 }, 514/*6*/ { "fbstp", NONE, 0, 0 }, 515/*7*/ { "fistp", QUAD, 0, 0 }, 516}; 517 518static const struct finst * const db_Esc_inst[] = { 519 db_Esc8, db_Esc9, db_Esca, db_Escb, 520 db_Escc, db_Escd, db_Esce, db_Escf 521}; 522 523static const char * const db_Grp1[] = { 524 "add", 525 "or", 526 "adc", 527 "sbb", 528 "and", 529 "sub", 530 "xor", 531 "cmp" 532}; 533 534static const char * const db_Grp2[] = { 535 "rol", 536 "ror", 537 "rcl", 538 "rcr", 539 "shl", 540 "shr", 541 "shl", 542 "sar" 543}; 544 545static const struct inst db_Grp3[] = { 546 { "test", TRUE, NONE, op2(I,E), 0 }, 547 { "test", TRUE, NONE, op2(I,E), 0 }, 548 { "not", TRUE, NONE, op1(E), 0 }, 549 { "neg", TRUE, NONE, op1(E), 0 }, 550 { "mul", TRUE, NONE, op2(E,A), 0 }, 551 { "imul", TRUE, NONE, op2(E,A), 0 }, 552 { "div", TRUE, NONE, op2(E,A), 0 }, 553 { "idiv", TRUE, NONE, op2(E,A), 0 }, 554}; 555 556static const struct inst db_Grp4[] = { 557 { "inc", TRUE, BYTE, op1(E), 0 }, 558 { "dec", TRUE, BYTE, op1(E), 0 }, 559 { "", TRUE, NONE, 0, 0 }, 560 { "", TRUE, NONE, 0, 0 }, 561 { "", TRUE, NONE, 0, 0 }, 562 { "", TRUE, NONE, 0, 0 }, 563 { "", TRUE, NONE, 0, 0 }, 564 { "", TRUE, NONE, 0, 0 } 565}; 566 567static const struct inst db_Grp5[] = { 568 { "inc", TRUE, LONG, op1(E), 0 }, 569 { "dec", TRUE, LONG, op1(E), 0 }, 570 { "call", TRUE, LONG, op1(Eind),0 }, 571 { "lcall", TRUE, LONG, op1(Eind),0 }, 572 { "jmp", TRUE, LONG, op1(Eind),0 }, 573 { "ljmp", TRUE, LONG, op1(Eind),0 }, 574 { "push", TRUE, LONG, op1(E), 0 }, 575 { "", TRUE, NONE, 0, 0 } 576}; 577 578static const struct inst db_inst_table[256] = { 579/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, 580/*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, 581/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, 582/*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, 583/*04*/ { "add", FALSE, BYTE, op2(I, A), 0 }, 584/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, 585/*06*/ { "push", FALSE, NONE, op1(Si), 0 }, 586/*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, 587 588/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, 589/*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, 590/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, 591/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, 592/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, 593/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, 594/*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, 595/*0f*/ { "", FALSE, NONE, 0, 0 }, 596 597/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, 598/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, 599/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, 600/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, 601/*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 }, 602/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, 603/*16*/ { "push", FALSE, NONE, op1(Si), 0 }, 604/*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, 605 606/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, 607/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, 608/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, 609/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, 610/*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 }, 611/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, 612/*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, 613/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, 614 615/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, 616/*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, 617/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, 618/*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, 619/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, 620/*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, 621/*26*/ { "", FALSE, NONE, 0, 0 }, 622/*27*/ { "daa", FALSE, NONE, 0, 0 }, 623 624/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, 625/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, 626/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, 627/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, 628/*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 }, 629/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, 630/*2e*/ { "", FALSE, NONE, 0, 0 }, 631/*2f*/ { "das", FALSE, NONE, 0, 0 }, 632 633/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, 634/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, 635/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, 636/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, 637/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, 638/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, 639/*36*/ { "", FALSE, NONE, 0, 0 }, 640/*37*/ { "aaa", FALSE, NONE, 0, 0 }, 641 642/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, 643/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, 644/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, 645/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, 646/*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 }, 647/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, 648/*3e*/ { "", FALSE, NONE, 0, 0 }, 649/*3f*/ { "aas", FALSE, NONE, 0, 0 }, 650 651/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 652/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 653/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 654/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 655/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 656/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 657/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 658/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 659 660/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 661/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 662/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 663/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 664/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 665/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 666/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 667/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 668 669/*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, 670/*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, 671/*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, 672/*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, 673/*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, 674/*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, 675/*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, 676/*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, 677 678/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 679/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 680/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 681/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 682/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 683/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 684/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 685/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 686 687/*60*/ { "pusha", FALSE, LONG, 0, 0 }, 688/*61*/ { "popa", FALSE, LONG, 0, 0 }, 689/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, 690/*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 }, 691 692/*64*/ { "", FALSE, NONE, 0, 0 }, 693/*65*/ { "", FALSE, NONE, 0, 0 }, 694/*66*/ { "", FALSE, NONE, 0, 0 }, 695/*67*/ { "", FALSE, NONE, 0, 0 }, 696 697/*68*/ { "push", FALSE, LONG, op1(I), 0 }, 698/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, 699/*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 }, 700/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, 701/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, 702/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, 703/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, 704/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, 705 706/*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, 707/*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, 708/*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, 709/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, 710/*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, 711/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, 712/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, 713/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, 714 715/*78*/ { "js", FALSE, NONE, op1(Db), 0 }, 716/*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, 717/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, 718/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, 719/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, 720/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, 721/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, 722/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, 723 724/*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 725/*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 }, 726/*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 727/*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 }, 728/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, 729/*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, 730/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, 731/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, 732 733/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, 734/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, 735/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, 736/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, 737/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, 738/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, 739/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, 740/*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, 741 742/*90*/ { "nop", FALSE, NONE, 0, 0 }, 743/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 744/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 745/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 746/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 747/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 748/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 749/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 750 751/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ 752/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ 753/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, 754/*9b*/ { "wait", FALSE, NONE, 0, 0 }, 755/*9c*/ { "pushf", FALSE, LONG, 0, 0 }, 756/*9d*/ { "popf", FALSE, LONG, 0, 0 }, 757/*9e*/ { "sahf", FALSE, NONE, 0, 0 }, 758/*9f*/ { "lahf", FALSE, NONE, 0, 0 }, 759 760/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, 761/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, 762/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, 763/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, 764/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, 765/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, 766/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, 767/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, 768 769/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, 770/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, 771/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, 772/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, 773/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, 774/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, 775/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, 776/*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, 777 778/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 779/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 780/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 781/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 782/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 783/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 784/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 785/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 786 787/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 788/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 789/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 790/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 791/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 792/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 793/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 794/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 795 796/*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 }, 797/*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 }, 798/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, 799/*c3*/ { "ret", FALSE, NONE, 0, 0 }, 800/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, 801/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, 802/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, 803/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, 804 805/*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 }, 806/*c9*/ { "leave", FALSE, NONE, 0, 0 }, 807/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, 808/*cb*/ { "lret", FALSE, NONE, 0, 0 }, 809/*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, 810/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, 811/*ce*/ { "into", FALSE, NONE, 0, 0 }, 812/*cf*/ { "iret", FALSE, NONE, 0, 0 }, 813 814/*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 }, 815/*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 }, 816/*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 }, 817/*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 }, 818/*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 }, 819/*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 }, 820/*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 }, 821/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, 822 823/*d8*/ { "", TRUE, NONE, 0, db_Esc8 }, 824/*d9*/ { "", TRUE, NONE, 0, db_Esc9 }, 825/*da*/ { "", TRUE, NONE, 0, db_Esca }, 826/*db*/ { "", TRUE, NONE, 0, db_Escb }, 827/*dc*/ { "", TRUE, NONE, 0, db_Escc }, 828/*dd*/ { "", TRUE, NONE, 0, db_Escd }, 829/*de*/ { "", TRUE, NONE, 0, db_Esce }, 830/*df*/ { "", TRUE, NONE, 0, db_Escf }, 831 832/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, 833/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, 834/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, 835/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, 836/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, 837/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, 838/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, 839/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, 840 841/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, 842/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, 843/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, 844/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, 845/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, 846/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, 847/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, 848/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, 849 850/*f0*/ { "", FALSE, NONE, 0, 0 }, 851/*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 }, 852/*f2*/ { "", FALSE, NONE, 0, 0 }, 853/*f3*/ { "", FALSE, NONE, 0, 0 }, 854/*f4*/ { "hlt", FALSE, NONE, 0, 0 }, 855/*f5*/ { "cmc", FALSE, NONE, 0, 0 }, 856/*f6*/ { "", TRUE, BYTE, 0, db_Grp3 }, 857/*f7*/ { "", TRUE, LONG, 0, db_Grp3 }, 858 859/*f8*/ { "clc", FALSE, NONE, 0, 0 }, 860/*f9*/ { "stc", FALSE, NONE, 0, 0 }, 861/*fa*/ { "cli", FALSE, NONE, 0, 0 }, 862/*fb*/ { "sti", FALSE, NONE, 0, 0 }, 863/*fc*/ { "cld", FALSE, NONE, 0, 0 }, 864/*fd*/ { "std", FALSE, NONE, 0, 0 }, 865/*fe*/ { "", TRUE, NONE, 0, db_Grp4 }, 866/*ff*/ { "", TRUE, NONE, 0, db_Grp5 }, 867}; 868 869static const struct inst db_bad_inst = 870 { "???", FALSE, NONE, 0, 0 } 871; 872 873#define f_mod(byte) ((byte)>>6) 874#define f_reg(byte) (((byte)>>3)&0x7) 875#define f_rm(byte) ((byte)&0x7) 876 877#define sib_ss(byte) ((byte)>>6) 878#define sib_index(byte) (((byte)>>3)&0x7) 879#define sib_base(byte) ((byte)&0x7) 880 881struct i_addr { 882 int is_reg; /* if reg, reg number is in 'disp' */ 883 int disp; 884 const char * base; 885 const char * index; 886 int ss; 887}; 888 889static const char * const db_index_reg_16[8] = { 890 "%bx,%si", 891 "%bx,%di", 892 "%bp,%si", 893 "%bp,%di", 894 "%si", 895 "%di", 896 "%bp", 897 "%bx" 898}; 899 900static const char * const db_reg[3][8] = { 901 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, 902 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, 903 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } 904}; 905 906static const char * const db_seg_reg[8] = { 907 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 908}; 909 910/* 911 * lengths for size attributes 912 */ 913static const int db_lengths[] = { 914 1, /* BYTE */ 915 2, /* WORD */ 916 4, /* LONG */ 917 8, /* QUAD */ 918 4, /* SNGL */ 919 8, /* DBLR */ 920 10, /* EXTR */ 921}; 922 923#define get_value_inc(result, loc, size, is_signed) \ 924 result = db_get_value((loc), (size), (is_signed)); \ 925 (loc) += (size); 926 927static db_addr_t 928 db_disasm_esc(db_addr_t loc, int inst, int short_addr, 929 int size, const char *seg); 930static void db_print_address(const char *seg, int size, 931 struct i_addr *addrp); 932static db_addr_t 933 db_read_address(db_addr_t loc, int short_addr, int regmodrm, 934 struct i_addr *addrp); 935 936/* 937 * Read address at location and return updated location. 938 */ 939static db_addr_t 940db_read_address(loc, short_addr, regmodrm, addrp) 941 db_addr_t loc; 942 int short_addr; 943 int regmodrm; 944 struct i_addr * addrp; /* out */ 945{ 946 int mod, rm, sib, index, disp; 947 948 mod = f_mod(regmodrm); 949 rm = f_rm(regmodrm); 950 951 if (mod == 3) { 952 addrp->is_reg = TRUE; 953 addrp->disp = rm; 954 return (loc); 955 } 956 addrp->is_reg = FALSE; 957 addrp->index = NULL; 958 959 if (short_addr) { 960 addrp->index = NULL; 961 addrp->ss = 0; 962 switch (mod) { 963 case 0: 964 if (rm == 6) { 965 get_value_inc(disp, loc, 2, FALSE); 966 addrp->disp = disp; 967 addrp->base = NULL; 968 } 969 else { 970 addrp->disp = 0; 971 addrp->base = db_index_reg_16[rm]; 972 } 973 break; 974 case 1: 975 get_value_inc(disp, loc, 1, TRUE); 976 disp &= 0xFFFF; 977 addrp->disp = disp; 978 addrp->base = db_index_reg_16[rm]; 979 break; 980 case 2: 981 get_value_inc(disp, loc, 2, FALSE); 982 addrp->disp = disp; 983 addrp->base = db_index_reg_16[rm]; 984 break; 985 } 986 } 987 else { 988 if (mod != 3 && rm == 4) { 989 get_value_inc(sib, loc, 1, FALSE); 990 rm = sib_base(sib); 991 index = sib_index(sib); 992 if (index != 4) 993 addrp->index = db_reg[LONG][index]; 994 addrp->ss = sib_ss(sib); 995 } 996 997 switch (mod) { 998 case 0: 999 if (rm == 5) { 1000 get_value_inc(addrp->disp, loc, 4, FALSE); 1001 addrp->base = NULL; 1002 } 1003 else { 1004 addrp->disp = 0; 1005 addrp->base = db_reg[LONG][rm]; 1006 } 1007 break; 1008 1009 case 1: 1010 get_value_inc(disp, loc, 1, TRUE); 1011 addrp->disp = disp; 1012 addrp->base = db_reg[LONG][rm]; 1013 break; 1014 1015 case 2: 1016 get_value_inc(disp, loc, 4, FALSE); 1017 addrp->disp = disp; 1018 addrp->base = db_reg[LONG][rm]; 1019 break; 1020 } 1021 } 1022 return (loc); 1023} 1024 1025static void 1026db_print_address(seg, size, addrp) 1027 const char * seg; 1028 int size; 1029 struct i_addr * addrp; 1030{ 1031 if (addrp->is_reg) { 1032 db_printf("%s", db_reg[size][addrp->disp]); 1033 return; 1034 } 1035 1036 if (seg) { 1037 db_printf("%s:", seg); 1038 } 1039 1040 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY); 1041 if (addrp->base != NULL || addrp->index != NULL) { 1042 db_printf("("); 1043 if (addrp->base) 1044 db_printf("%s", addrp->base); 1045 if (addrp->index) 1046 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 1047 db_printf(")"); 1048 } 1049} 1050 1051/* 1052 * Disassemble floating-point ("escape") instruction 1053 * and return updated location. 1054 */ 1055static db_addr_t 1056db_disasm_esc(loc, inst, short_addr, size, seg) 1057 db_addr_t loc; 1058 int inst; 1059 int short_addr; 1060 int size; 1061 const char * seg; 1062{ 1063 int regmodrm; 1064 const struct finst * fp; 1065 int mod; 1066 struct i_addr address; 1067 const char * name; 1068 1069 get_value_inc(regmodrm, loc, 1, FALSE); 1070 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 1071 mod = f_mod(regmodrm); 1072 if (mod != 3) { 1073 if (*fp->f_name == '\0') { 1074 db_printf("<bad instruction>"); 1075 return (loc); 1076 } 1077 /* 1078 * Normal address modes. 1079 */ 1080 loc = db_read_address(loc, short_addr, regmodrm, &address); 1081 db_printf("%s", fp->f_name); 1082 switch(fp->f_size) { 1083 case SNGL: 1084 db_printf("s"); 1085 break; 1086 case DBLR: 1087 db_printf("l"); 1088 break; 1089 case EXTR: 1090 db_printf("t"); 1091 break; 1092 case WORD: 1093 db_printf("s"); 1094 break; 1095 case LONG: 1096 db_printf("l"); 1097 break; 1098 case QUAD: 1099 db_printf("q"); 1100 break; 1101 default: 1102 break; 1103 } 1104 db_printf("\t"); 1105 db_print_address(seg, BYTE, &address); 1106 } 1107 else { 1108 /* 1109 * 'reg-reg' - special formats 1110 */ 1111 switch (fp->f_rrmode) { 1112 case op2(ST,STI): 1113 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1114 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1115 break; 1116 case op2(STI,ST): 1117 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1118 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1119 break; 1120 case op1(STI): 1121 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1122 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1123 break; 1124 case op1(X): 1125 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1126 if (*name == '\0') 1127 goto bad; 1128 db_printf("%s", name); 1129 break; 1130 case op1(XA): 1131 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1132 if (*name == '\0') 1133 goto bad; 1134 db_printf("%s\t%%ax", name); 1135 break; 1136 default: 1137 bad: 1138 db_printf("<bad instruction>"); 1139 break; 1140 } 1141 } 1142 1143 return (loc); 1144} 1145 1146/* 1147 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1148 * (optional) alternate format. Return address of start of 1149 * next instruction. 1150 */ 1151db_addr_t 1152db_disasm(db_addr_t loc, bool altfmt) 1153{ 1154 int inst; 1155 int size; 1156 int short_addr; 1157 const char * seg; 1158 const struct inst * ip; 1159 const char * i_name; 1160 int i_size; 1161 int i_mode; 1162 int regmodrm = 0; 1163 boolean_t first; 1164 int displ; 1165 int prefix; 1166 int rep; 1167 int imm; 1168 int imm2; 1169 int len; 1170 struct i_addr address; 1171 1172 if (db_segsize(kdb_frame) == 16) 1173 altfmt = !altfmt; 1174 get_value_inc(inst, loc, 1, FALSE); 1175 if (altfmt) { 1176 short_addr = TRUE; 1177 size = WORD; 1178 } 1179 else { 1180 short_addr = FALSE; 1181 size = LONG; 1182 } 1183 seg = NULL; 1184 1185 /* 1186 * Get prefixes 1187 */ 1188 rep = FALSE; 1189 prefix = TRUE; 1190 do { 1191 switch (inst) { 1192 case 0x66: /* data16 */ 1193 size = WORD; 1194 break; 1195 case 0x67: 1196 short_addr = TRUE; 1197 break; 1198 case 0x26: 1199 seg = "%es"; 1200 break; 1201 case 0x36: 1202 seg = "%ss"; 1203 break; 1204 case 0x2e: 1205 seg = "%cs"; 1206 break; 1207 case 0x3e: 1208 seg = "%ds"; 1209 break; 1210 case 0x64: 1211 seg = "%fs"; 1212 break; 1213 case 0x65: 1214 seg = "%gs"; 1215 break; 1216 case 0xf0: 1217 db_printf("lock "); 1218 break; 1219 case 0xf2: 1220 db_printf("repne "); 1221 break; 1222 case 0xf3: 1223 rep = TRUE; 1224 break; 1225 default: 1226 prefix = FALSE; 1227 break; 1228 } 1229 if (prefix) { 1230 get_value_inc(inst, loc, 1, FALSE); 1231 } 1232 if (rep == TRUE) { 1233 if (inst == 0x90) { 1234 db_printf("pause\n"); 1235 return (loc); 1236 } 1237 db_printf("repe "); /* XXX repe VS rep */ 1238 rep = FALSE; 1239 } 1240 } while (prefix); 1241 1242 if (inst >= 0xd8 && inst <= 0xdf) { 1243 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1244 db_printf("\n"); 1245 return (loc); 1246 } 1247 1248 if (inst == 0x0f) { 1249 get_value_inc(inst, loc, 1, FALSE); 1250 ip = db_inst_0f[inst>>4]; 1251 if (ip == NULL) { 1252 ip = &db_bad_inst; 1253 } 1254 else { 1255 ip = &ip[inst&0xf]; 1256 } 1257 } 1258 else 1259 ip = &db_inst_table[inst]; 1260 1261 if (ip->i_has_modrm) { 1262 get_value_inc(regmodrm, loc, 1, FALSE); 1263 loc = db_read_address(loc, short_addr, regmodrm, &address); 1264 } 1265 1266 i_name = ip->i_name; 1267 i_size = ip->i_size; 1268 i_mode = ip->i_mode; 1269 1270 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 || 1271 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 || 1272 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 || 1273 ip->i_extra == db_Grp15) { 1274 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)]; 1275 } 1276 else if (ip->i_extra == db_Grp3) { 1277 ip = ip->i_extra; 1278 ip = &ip[f_reg(regmodrm)]; 1279 i_name = ip->i_name; 1280 i_mode = ip->i_mode; 1281 } 1282 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) { 1283 ip = ip->i_extra; 1284 ip = &ip[f_reg(regmodrm)]; 1285 i_name = ip->i_name; 1286 i_mode = ip->i_mode; 1287 i_size = ip->i_size; 1288 } 1289 1290 /* Special cases that don't fit well in the tables. */ 1291 if (ip->i_extra == db_Grp7 && f_mod(regmodrm) == 3) { 1292 switch (regmodrm) { 1293 case 0xc8: 1294 i_name = "monitor"; 1295 i_size = NONE; 1296 i_mode = 0; 1297 break; 1298 case 0xc9: 1299 i_name = "mwait"; 1300 i_size = NONE; 1301 i_mode = 0; 1302 break; 1303 } 1304 } 1305 if (ip->i_extra == db_Grp15 && f_mod(regmodrm) == 3) { 1306 i_name = db_Grp15b[f_reg(regmodrm)]; 1307 i_size = NONE; 1308 i_mode = 0; 1309 } 1310 1311 if (i_size == SDEP) { 1312 if (size == WORD) 1313 db_printf("%s", i_name); 1314 else 1315 db_printf("%s", (const char *)ip->i_extra); 1316 } 1317 else { 1318 db_printf("%s", i_name); 1319 if (i_size != NONE) { 1320 if (i_size == BYTE) { 1321 db_printf("b"); 1322 size = BYTE; 1323 } 1324 else if (i_size == WORD) { 1325 db_printf("w"); 1326 size = WORD; 1327 } 1328 else if (size == WORD) 1329 db_printf("w"); 1330 else 1331 db_printf("l"); 1332 } 1333 } 1334 db_printf("\t"); 1335 for (first = TRUE; 1336 i_mode != 0; 1337 i_mode >>= 8, first = FALSE) 1338 { 1339 if (!first) 1340 db_printf(","); 1341 1342 switch (i_mode & 0xFF) { 1343 1344 case E: 1345 db_print_address(seg, size, &address); 1346 break; 1347 1348 case Eind: 1349 db_printf("*"); 1350 db_print_address(seg, size, &address); 1351 break; 1352 1353 case El: 1354 db_print_address(seg, LONG, &address); 1355 break; 1356 1357 case Ew: 1358 db_print_address(seg, WORD, &address); 1359 break; 1360 1361 case Eb: 1362 db_print_address(seg, BYTE, &address); 1363 break; 1364 1365 case R: 1366 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1367 break; 1368 1369 case Rw: 1370 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1371 break; 1372 1373 case Ri: 1374 db_printf("%s", db_reg[size][f_rm(inst)]); 1375 break; 1376 1377 case Ril: 1378 db_printf("%s", db_reg[LONG][f_rm(inst)]); 1379 break; 1380 1381 case S: 1382 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1383 break; 1384 1385 case Si: 1386 db_printf("%s", db_seg_reg[f_reg(inst)]); 1387 break; 1388 1389 case A: 1390 db_printf("%s", db_reg[size][0]); /* acc */ 1391 break; 1392 1393 case BX: 1394 if (seg) 1395 db_printf("%s:", seg); 1396 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1397 break; 1398 1399 case CL: 1400 db_printf("%%cl"); 1401 break; 1402 1403 case DX: 1404 db_printf("%%dx"); 1405 break; 1406 1407 case SI: 1408 if (seg) 1409 db_printf("%s:", seg); 1410 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1411 break; 1412 1413 case DI: 1414 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1415 break; 1416 1417 case CR: 1418 db_printf("%%cr%d", f_reg(regmodrm)); 1419 break; 1420 1421 case DR: 1422 db_printf("%%dr%d", f_reg(regmodrm)); 1423 break; 1424 1425 case TR: 1426 db_printf("%%tr%d", f_reg(regmodrm)); 1427 break; 1428 1429 case I: 1430 len = db_lengths[size]; 1431 get_value_inc(imm, loc, len, FALSE); 1432 db_printf("$%#r", imm); 1433 break; 1434 1435 case Is: 1436 len = db_lengths[size]; 1437 get_value_inc(imm, loc, len, FALSE); 1438 db_printf("$%+#r", imm); 1439 break; 1440 1441 case Ib: 1442 get_value_inc(imm, loc, 1, FALSE); 1443 db_printf("$%#r", imm); 1444 break; 1445 1446 case Iba: 1447 get_value_inc(imm, loc, 1, FALSE); 1448 if (imm != 0x0a) 1449 db_printf("$%#r", imm); 1450 break; 1451 1452 case Ibs: 1453 get_value_inc(imm, loc, 1, TRUE); 1454 if (size == WORD) 1455 imm &= 0xFFFF; 1456 db_printf("$%+#r", imm); 1457 break; 1458 1459 case Iw: 1460 get_value_inc(imm, loc, 2, FALSE); 1461 db_printf("$%#r", imm); 1462 break; 1463 1464 case O: 1465 len = (short_addr ? 2 : 4); 1466 get_value_inc(displ, loc, len, FALSE); 1467 if (seg) 1468 db_printf("%s:%+#r",seg, displ); 1469 else 1470 db_printsym((db_addr_t)displ, DB_STGY_ANY); 1471 break; 1472 1473 case Db: 1474 get_value_inc(displ, loc, 1, TRUE); 1475 displ += loc; 1476 if (size == WORD) 1477 displ &= 0xFFFF; 1478 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1479 break; 1480 1481 case Dl: 1482 len = db_lengths[size]; 1483 get_value_inc(displ, loc, len, FALSE); 1484 displ += loc; 1485 if (size == WORD) 1486 displ &= 0xFFFF; 1487 db_printsym((db_addr_t)displ, DB_STGY_XTRN); 1488 break; 1489 1490 case o1: 1491 db_printf("$1"); 1492 break; 1493 1494 case o3: 1495 db_printf("$3"); 1496 break; 1497 1498 case OS: 1499 len = db_lengths[size]; 1500 get_value_inc(imm, loc, len, FALSE); /* offset */ 1501 get_value_inc(imm2, loc, 2, FALSE); /* segment */ 1502 db_printf("$%#r,%#r", imm2, imm); 1503 break; 1504 } 1505 } 1506 db_printf("\n"); 1507 return (loc); 1508} 1509