db_disasm.c revision 2056
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 * $Id: db_disasm.c,v 1.5 1993/12/19 00:49:58 wollman Exp $ 27 */ 28 29/* 30 * Instruction disassembler. 31 */ 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/proc.h> 35#include <ddb/ddb.h> 36 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 Il 24 /* long immediate */ 80#define O 25 /* direct address */ 81#define Db 26 /* byte displacement from EIP */ 82#define Dl 27 /* long displacement from EIP */ 83#define o1 28 /* constant 1 */ 84#define o3 29 /* constant 3 */ 85#define OS 30 /* immediate offset/segment */ 86#define ST 31 /* FP stack top */ 87#define STI 32 /* FP stack */ 88#define X 33 /* extended FP op */ 89#define XA 34 /* for 'fstcw %ax' */ 90 91struct inst { 92 char * i_name; /* name */ 93 short i_has_modrm; /* has regmodrm byte */ 94 short i_size; /* operand size */ 95 int i_mode; /* addressing modes */ 96 char * i_extra; /* pointer to extra opcode table */ 97}; 98 99#define op1(x) (x) 100#define op2(x,y) ((x)|((y)<<8)) 101#define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 102 103struct finst { 104 char * f_name; /* name for memory instruction */ 105 int f_size; /* size for memory instruction */ 106 int f_rrmode; /* mode for rr instruction */ 107 char * f_rrname; /* name for rr instruction 108 (or pointer to table) */ 109}; 110 111char * db_Grp6[] = { 112 "sldt", 113 "str", 114 "lldt", 115 "ltr", 116 "verr", 117 "verw", 118 "", 119 "" 120}; 121 122char * db_Grp7[] = { 123 "sgdt", 124 "sidt", 125 "lgdt", 126 "lidt", 127 "smsw", 128 "", 129 "lmsw", 130 "invlpg" 131}; 132 133char * db_Grp8[] = { 134 "", 135 "", 136 "", 137 "", 138 "bt", 139 "bts", 140 "btr", 141 "btc" 142}; 143 144struct inst db_inst_0f0x[] = { 145/*00*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp6 }, 146/*01*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp7 }, 147/*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, 148/*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, 149/*04*/ { "", FALSE, NONE, 0, 0 }, 150/*05*/ { "", FALSE, NONE, 0, 0 }, 151/*06*/ { "clts", FALSE, NONE, 0, 0 }, 152/*07*/ { "", FALSE, NONE, 0, 0 }, 153 154/*08*/ { "invd", FALSE, NONE, 0, 0 }, 155/*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, 156/*0a*/ { "", FALSE, NONE, 0, 0 }, 157/*0b*/ { "", FALSE, NONE, 0, 0 }, 158/*0c*/ { "", FALSE, NONE, 0, 0 }, 159/*0d*/ { "", FALSE, NONE, 0, 0 }, 160/*0e*/ { "", FALSE, NONE, 0, 0 }, 161/*0f*/ { "", FALSE, NONE, 0, 0 }, 162}; 163 164struct inst db_inst_0f2x[] = { 165/*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */ 166/*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */ 167/*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 }, 168/*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 }, 169/*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 }, 170/*25*/ { "", FALSE, NONE, 0, 0 }, 171/*26*/ { "mov", TRUE, LONG, op2(E,TR), 0 }, 172/*27*/ { "", FALSE, NONE, 0, 0 }, 173 174/*28*/ { "", FALSE, NONE, 0, 0 }, 175/*29*/ { "", FALSE, NONE, 0, 0 }, 176/*2a*/ { "", FALSE, NONE, 0, 0 }, 177/*2b*/ { "", FALSE, NONE, 0, 0 }, 178/*2c*/ { "", FALSE, NONE, 0, 0 }, 179/*2d*/ { "", FALSE, NONE, 0, 0 }, 180/*2e*/ { "", FALSE, NONE, 0, 0 }, 181/*2f*/ { "", FALSE, NONE, 0, 0 }, 182}; 183 184struct inst db_inst_0f8x[] = { 185/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, 186/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, 187/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, 188/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, 189/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, 190/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, 191/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, 192/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, 193 194/*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, 195/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, 196/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, 197/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, 198/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, 199/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, 200/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, 201/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, 202}; 203 204struct inst db_inst_0f9x[] = { 205/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, 206/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, 207/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, 208/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, 209/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, 210/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, 211/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, 212/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, 213 214/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, 215/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, 216/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, 217/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, 218/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, 219/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, 220/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, 221/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, 222}; 223 224struct inst db_inst_0fax[] = { 225/*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, 226/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, 227/*a2*/ { "", FALSE, NONE, 0, 0 }, 228/*a3*/ { "bt", TRUE, LONG, op2(E,R), 0 }, 229/*a4*/ { "shld", TRUE, LONG, op3(Ib,E,R), 0 }, 230/*a5*/ { "shld", TRUE, LONG, op3(CL,E,R), 0 }, 231/*a6*/ { "", FALSE, NONE, 0, 0 }, 232/*a7*/ { "", FALSE, NONE, 0, 0 }, 233 234/*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, 235/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, 236/*aa*/ { "", FALSE, NONE, 0, 0 }, 237/*ab*/ { "bts", TRUE, LONG, op2(E,R), 0 }, 238/*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 }, 239/*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 }, 240/*a6*/ { "", FALSE, NONE, 0, 0 }, 241/*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 }, 242}; 243 244struct inst db_inst_0fbx[] = { 245/*b0*/ { "", FALSE, NONE, 0, 0 }, 246/*b1*/ { "", FALSE, NONE, 0, 0 }, 247/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, 248/*b3*/ { "bts", TRUE, LONG, op2(R, E), 0 }, 249/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, 250/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, 251/*b6*/ { "movzb", TRUE, LONG, op2(E, R), 0 }, 252/*b7*/ { "movzw", TRUE, LONG, op2(E, R), 0 }, 253 254/*b8*/ { "", FALSE, NONE, 0, 0 }, 255/*b9*/ { "", FALSE, NONE, 0, 0 }, 256/*ba*/ { "", TRUE, LONG, op2(Is, E), (char *)db_Grp8 }, 257/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, 258/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, 259/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, 260/*be*/ { "movsb", TRUE, LONG, op2(E, R), 0 }, 261/*bf*/ { "movsw", TRUE, LONG, op2(E, R), 0 }, 262}; 263 264struct inst db_inst_0fcx[] = { 265/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, 266/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, 267/*c2*/ { "", FALSE, NONE, 0, 0 }, 268/*c3*/ { "", FALSE, NONE, 0, 0 }, 269/*c4*/ { "", FALSE, NONE, 0, 0 }, 270/*c5*/ { "", FALSE, NONE, 0, 0 }, 271/*c6*/ { "", FALSE, NONE, 0, 0 }, 272/*c7*/ { "", FALSE, NONE, 0, 0 }, 273/*c8*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 274/*c9*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 275/*ca*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 276/*cb*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 277/*cc*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 278/*cd*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 279/*ce*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 280/*cf*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, 281}; 282 283struct inst db_inst_0fdx[] = { 284/*c0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, 285/*c1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, 286/*c2*/ { "", FALSE, NONE, 0, 0 }, 287/*c3*/ { "", FALSE, NONE, 0, 0 }, 288/*c4*/ { "", FALSE, NONE, 0, 0 }, 289/*c5*/ { "", FALSE, NONE, 0, 0 }, 290/*c6*/ { "", FALSE, NONE, 0, 0 }, 291/*c7*/ { "", FALSE, NONE, 0, 0 }, 292/*c8*/ { "", FALSE, NONE, 0, 0 }, 293/*c9*/ { "", FALSE, NONE, 0, 0 }, 294/*ca*/ { "", FALSE, NONE, 0, 0 }, 295/*cb*/ { "", FALSE, NONE, 0, 0 }, 296/*cc*/ { "", FALSE, NONE, 0, 0 }, 297/*cd*/ { "", FALSE, NONE, 0, 0 }, 298/*ce*/ { "", FALSE, NONE, 0, 0 }, 299/*cf*/ { "", FALSE, NONE, 0, 0 }, 300}; 301 302struct inst *db_inst_0f[] = { 303 db_inst_0f0x, 304 0, 305 db_inst_0f2x, 306 0, 307 0, 308 0, 309 0, 310 0, 311 db_inst_0f8x, 312 db_inst_0f9x, 313 db_inst_0fax, 314 db_inst_0fbx, 315 db_inst_0fcx, 316 db_inst_0fdx, 317 0, 318 0 319}; 320 321char * db_Esc92[] = { 322 "fnop", "", "", "", "", "", "", "" 323}; 324char * db_Esc93[] = { 325 "", "", "", "", "", "", "", "" 326}; 327char * db_Esc94[] = { 328 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 329}; 330char * db_Esc95[] = { 331 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 332}; 333char * db_Esc96[] = { 334 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 335 "fincstp" 336}; 337char * db_Esc97[] = { 338 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 339}; 340 341char * db_Esca4[] = { 342 "", "fucompp","", "", "", "", "", "" 343}; 344 345char * db_Escb4[] = { 346 "", "", "fnclex","fninit","", "", "", "" 347}; 348 349char * db_Esce3[] = { 350 "", "fcompp","", "", "", "", "", "" 351}; 352 353char * db_Escf4[] = { 354 "fnstsw","", "", "", "", "", "", "" 355}; 356 357struct finst db_Esc8[] = { 358/*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 359/*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 360/*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 361/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 362/*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 363/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 364/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 365/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 366}; 367 368struct finst db_Esc9[] = { 369/*0*/ { "fld", SNGL, op1(STI), 0 }, 370/*1*/ { "", NONE, op1(STI), "fxch" }, 371/*2*/ { "fst", SNGL, op1(X), (char *)db_Esc92 }, 372/*3*/ { "fstp", SNGL, op1(X), (char *)db_Esc93 }, 373/*4*/ { "fldenv", NONE, op1(X), (char *)db_Esc94 }, 374/*5*/ { "fldcw", NONE, op1(X), (char *)db_Esc95 }, 375/*6*/ { "fnstenv",NONE, op1(X), (char *)db_Esc96 }, 376/*7*/ { "fnstcw", NONE, op1(X), (char *)db_Esc97 }, 377}; 378 379struct finst db_Esca[] = { 380/*0*/ { "fiadd", WORD, 0, 0 }, 381/*1*/ { "fimul", WORD, 0, 0 }, 382/*2*/ { "ficom", WORD, 0, 0 }, 383/*3*/ { "ficomp", WORD, 0, 0 }, 384/*4*/ { "fisub", WORD, op1(X), (char *)db_Esca4 }, 385/*5*/ { "fisubr", WORD, 0, 0 }, 386/*6*/ { "fidiv", WORD, 0, 0 }, 387/*7*/ { "fidivr", WORD, 0, 0 } 388}; 389 390struct finst db_Escb[] = { 391/*0*/ { "fild", WORD, 0, 0 }, 392/*1*/ { "", NONE, 0, 0 }, 393/*2*/ { "fist", WORD, 0, 0 }, 394/*3*/ { "fistp", WORD, 0, 0 }, 395/*4*/ { "", WORD, op1(X), (char *)db_Escb4 }, 396/*5*/ { "fld", EXTR, 0, 0 }, 397/*6*/ { "", WORD, 0, 0 }, 398/*7*/ { "fstp", EXTR, 0, 0 }, 399}; 400 401struct finst db_Escc[] = { 402/*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 403/*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 404/*2*/ { "fcom", DBLR, op2(ST,STI), 0 }, 405/*3*/ { "fcomp", DBLR, op2(ST,STI), 0 }, 406/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 407/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 408/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 409/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 410}; 411 412struct finst db_Escd[] = { 413/*0*/ { "fld", DBLR, op1(STI), "ffree" }, 414/*1*/ { "", NONE, 0, 0 }, 415/*2*/ { "fst", DBLR, op1(STI), 0 }, 416/*3*/ { "fstp", DBLR, op1(STI), 0 }, 417/*4*/ { "frstor", NONE, op1(STI), "fucom" }, 418/*5*/ { "", NONE, op1(STI), "fucomp" }, 419/*6*/ { "fnsave", NONE, 0, 0 }, 420/*7*/ { "fnstsw", NONE, 0, 0 }, 421}; 422 423struct finst db_Esce[] = { 424/*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" }, 425/*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" }, 426/*2*/ { "ficom", LONG, 0, 0 }, 427/*3*/ { "ficomp", LONG, op1(X), (char *)db_Esce3 }, 428/*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" }, 429/*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" }, 430/*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" }, 431/*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" }, 432}; 433 434struct finst db_Escf[] = { 435/*0*/ { "fild", LONG, 0, 0 }, 436/*1*/ { "", LONG, 0, 0 }, 437/*2*/ { "fist", LONG, 0, 0 }, 438/*3*/ { "fistp", LONG, 0, 0 }, 439/*4*/ { "fbld", NONE, op1(XA), (char *)db_Escf4 }, 440/*5*/ { "fld", QUAD, 0, 0 }, 441/*6*/ { "fbstp", NONE, 0, 0 }, 442/*7*/ { "fstp", QUAD, 0, 0 }, 443}; 444 445struct finst *db_Esc_inst[] = { 446 db_Esc8, db_Esc9, db_Esca, db_Escb, 447 db_Escc, db_Escd, db_Esce, db_Escf 448}; 449 450char * db_Grp1[] = { 451 "add", 452 "or", 453 "adc", 454 "sbb", 455 "and", 456 "sub", 457 "xor", 458 "cmp" 459}; 460 461char * db_Grp2[] = { 462 "rol", 463 "ror", 464 "rcl", 465 "rcr", 466 "shl", 467 "shr", 468 "shl", 469 "sar" 470}; 471 472struct inst db_Grp3[] = { 473 { "test", TRUE, NONE, op2(I,E), 0 }, 474 { "test", TRUE, NONE, op2(I,E), 0 }, 475 { "not", TRUE, NONE, op1(E), 0 }, 476 { "neg", TRUE, NONE, op1(E), 0 }, 477 { "mul", TRUE, NONE, op2(E,A), 0 }, 478 { "imul", TRUE, NONE, op2(E,A), 0 }, 479 { "div", TRUE, NONE, op2(E,A), 0 }, 480 { "idiv", TRUE, NONE, op2(E,A), 0 }, 481}; 482 483struct inst db_Grp4[] = { 484 { "inc", TRUE, BYTE, op1(E), 0 }, 485 { "dec", TRUE, BYTE, op1(E), 0 }, 486 { "", TRUE, NONE, 0, 0 }, 487 { "", TRUE, NONE, 0, 0 }, 488 { "", TRUE, NONE, 0, 0 }, 489 { "", TRUE, NONE, 0, 0 }, 490 { "", TRUE, NONE, 0, 0 }, 491 { "", TRUE, NONE, 0, 0 } 492}; 493 494struct inst db_Grp5[] = { 495 { "inc", TRUE, LONG, op1(E), 0 }, 496 { "dec", TRUE, LONG, op1(E), 0 }, 497 { "call", TRUE, NONE, op1(Eind),0 }, 498 { "lcall", TRUE, NONE, op1(Eind),0 }, 499 { "jmp", TRUE, NONE, op1(Eind),0 }, 500 { "ljmp", TRUE, NONE, op1(Eind),0 }, 501 { "push", TRUE, LONG, op1(E), 0 }, 502 { "", TRUE, NONE, 0, 0 } 503}; 504 505struct inst db_inst_table[256] = { 506/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, 507/*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, 508/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, 509/*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, 510/*04*/ { "add", FALSE, BYTE, op2(Is, A), 0 }, 511/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, 512/*06*/ { "push", FALSE, NONE, op1(Si), 0 }, 513/*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, 514 515/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, 516/*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, 517/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, 518/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, 519/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, 520/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, 521/*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, 522/*0f*/ { "", FALSE, NONE, 0, 0 }, 523 524/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, 525/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, 526/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, 527/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, 528/*14*/ { "adc", FALSE, BYTE, op2(Is, A), 0 }, 529/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, 530/*16*/ { "push", FALSE, NONE, op1(Si), 0 }, 531/*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, 532 533/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, 534/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, 535/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, 536/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, 537/*1c*/ { "sbb", FALSE, BYTE, op2(Is, A), 0 }, 538/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, 539/*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, 540/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, 541 542/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, 543/*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, 544/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, 545/*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, 546/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, 547/*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, 548/*26*/ { "", FALSE, NONE, 0, 0 }, 549/*27*/ { "aaa", FALSE, NONE, 0, 0 }, 550 551/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, 552/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, 553/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, 554/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, 555/*2c*/ { "sub", FALSE, BYTE, op2(Is, A), 0 }, 556/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, 557/*2e*/ { "", FALSE, NONE, 0, 0 }, 558/*2f*/ { "das", FALSE, NONE, 0, 0 }, 559 560/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, 561/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, 562/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, 563/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, 564/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, 565/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, 566/*36*/ { "", FALSE, NONE, 0, 0 }, 567/*37*/ { "daa", FALSE, NONE, 0, 0 }, 568 569/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, 570/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, 571/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, 572/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, 573/*3c*/ { "cmp", FALSE, BYTE, op2(Is, A), 0 }, 574/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, 575/*3e*/ { "", FALSE, NONE, 0, 0 }, 576/*3f*/ { "aas", FALSE, NONE, 0, 0 }, 577 578/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 579/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 580/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 581/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 582/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 583/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 584/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 585/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 586 587/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 588/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 589/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 590/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 591/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 592/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 593/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 594/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 595 596/*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, 597/*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, 598/*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, 599/*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, 600/*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, 601/*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, 602/*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, 603/*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, 604 605/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 606/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 607/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 608/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 609/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 610/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 611/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 612/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 613 614/*60*/ { "pusha", FALSE, LONG, 0, 0 }, 615/*61*/ { "popa", FALSE, LONG, 0, 0 }, 616/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, 617/*63*/ { "arpl", TRUE, NONE, op2(Ew,Rw), 0 }, 618 619/*64*/ { "", FALSE, NONE, 0, 0 }, 620/*65*/ { "", FALSE, NONE, 0, 0 }, 621/*66*/ { "", FALSE, NONE, 0, 0 }, 622/*67*/ { "", FALSE, NONE, 0, 0 }, 623 624/*68*/ { "push", FALSE, LONG, op1(I), 0 }, 625/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, 626/*6a*/ { "push", FALSE, LONG, op1(Ib), 0 }, 627/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, 628/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, 629/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, 630/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, 631/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, 632 633/*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, 634/*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, 635/*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, 636/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, 637/*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, 638/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, 639/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, 640/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, 641 642/*78*/ { "js", FALSE, NONE, op1(Db), 0 }, 643/*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, 644/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, 645/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, 646/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, 647/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, 648/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, 649/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, 650 651/*80*/ { "", TRUE, BYTE, op2(I, E), (char *)db_Grp1 }, 652/*81*/ { "", TRUE, LONG, op2(I, E), (char *)db_Grp1 }, 653/*82*/ { "", TRUE, BYTE, op2(Is,E), (char *)db_Grp1 }, 654/*83*/ { "", TRUE, LONG, op2(Ibs,E), (char *)db_Grp1 }, 655/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, 656/*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, 657/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, 658/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, 659 660/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, 661/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, 662/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, 663/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, 664/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, 665/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, 666/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, 667/*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, 668 669/*90*/ { "nop", FALSE, NONE, 0, 0 }, 670/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 671/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 672/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 673/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 674/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 675/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 676/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 677 678/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ 679/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ 680/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, 681/*9b*/ { "wait", FALSE, NONE, 0, 0 }, 682/*9c*/ { "pushf", FALSE, LONG, 0, 0 }, 683/*9d*/ { "popf", FALSE, LONG, 0, 0 }, 684/*9e*/ { "sahf", FALSE, NONE, 0, 0 }, 685/*9f*/ { "lahf", FALSE, NONE, 0, 0 }, 686 687/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, 688/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, 689/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, 690/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, 691/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, 692/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, 693/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, 694/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, 695 696/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, 697/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, 698/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, 699/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, 700/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, 701/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, 702/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, 703/*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, 704 705/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 706/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 707/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 708/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 709/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 710/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 711/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 712/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 713 714/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 715/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 716/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 717/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 718/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 719/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 720/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 721/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 722 723/*c0*/ { "", TRUE, BYTE, op2(Ib, E), (char *)db_Grp2 }, 724/*c1*/ { "", TRUE, LONG, op2(Ib, E), (char *)db_Grp2 }, 725/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, 726/*c3*/ { "ret", FALSE, NONE, 0, 0 }, 727/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, 728/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, 729/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, 730/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, 731 732/*c8*/ { "enter", FALSE, NONE, op2(Ib, Iw), 0 }, 733/*c9*/ { "leave", FALSE, NONE, 0, 0 }, 734/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, 735/*cb*/ { "lret", FALSE, NONE, 0, 0 }, 736/*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, 737/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, 738/*ce*/ { "into", FALSE, NONE, 0, 0 }, 739/*cf*/ { "iret", FALSE, NONE, 0, 0 }, 740 741/*d0*/ { "", TRUE, BYTE, op2(o1, E), (char *)db_Grp2 }, 742/*d1*/ { "", TRUE, LONG, op2(o1, E), (char *)db_Grp2 }, 743/*d2*/ { "", TRUE, BYTE, op2(CL, E), (char *)db_Grp2 }, 744/*d3*/ { "", TRUE, LONG, op2(CL, E), (char *)db_Grp2 }, 745/*d4*/ { "aam", TRUE, NONE, 0, 0 }, 746/*d5*/ { "aad", TRUE, NONE, 0, 0 }, 747/*d6*/ { "", FALSE, NONE, 0, 0 }, 748/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, 749 750/*d8*/ { "", TRUE, NONE, 0, (char *)db_Esc8 }, 751/*d9*/ { "", TRUE, NONE, 0, (char *)db_Esc9 }, 752/*da*/ { "", TRUE, NONE, 0, (char *)db_Esca }, 753/*db*/ { "", TRUE, NONE, 0, (char *)db_Escb }, 754/*dc*/ { "", TRUE, NONE, 0, (char *)db_Escc }, 755/*dd*/ { "", TRUE, NONE, 0, (char *)db_Escd }, 756/*de*/ { "", TRUE, NONE, 0, (char *)db_Esce }, 757/*df*/ { "", TRUE, NONE, 0, (char *)db_Escf }, 758 759/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, 760/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, 761/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, 762/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, 763/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, 764/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, 765/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, 766/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, 767 768/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, 769/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, 770/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, 771/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, 772/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, 773/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, 774/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, 775/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, 776 777/*f0*/ { "", FALSE, NONE, 0, 0 }, 778/*f1*/ { "", FALSE, NONE, 0, 0 }, 779/*f2*/ { "", FALSE, NONE, 0, 0 }, 780/*f3*/ { "", FALSE, NONE, 0, 0 }, 781/*f4*/ { "hlt", FALSE, NONE, 0, 0 }, 782/*f5*/ { "cmc", FALSE, NONE, 0, 0 }, 783/*f6*/ { "", TRUE, BYTE, 0, (char *)db_Grp3 }, 784/*f7*/ { "", TRUE, LONG, 0, (char *)db_Grp3 }, 785 786/*f8*/ { "clc", FALSE, NONE, 0, 0 }, 787/*f9*/ { "stc", FALSE, NONE, 0, 0 }, 788/*fa*/ { "cli", FALSE, NONE, 0, 0 }, 789/*fb*/ { "sti", FALSE, NONE, 0, 0 }, 790/*fc*/ { "cld", FALSE, NONE, 0, 0 }, 791/*fd*/ { "std", FALSE, NONE, 0, 0 }, 792/*fe*/ { "", TRUE, NONE, 0, (char *)db_Grp4 }, 793/*ff*/ { "", TRUE, NONE, 0, (char *)db_Grp5 }, 794}; 795 796struct inst db_bad_inst = 797 { "???", FALSE, NONE, 0, 0 } 798; 799 800#define f_mod(byte) ((byte)>>6) 801#define f_reg(byte) (((byte)>>3)&0x7) 802#define f_rm(byte) ((byte)&0x7) 803 804#define sib_ss(byte) ((byte)>>6) 805#define sib_index(byte) (((byte)>>3)&0x7) 806#define sib_base(byte) ((byte)&0x7) 807 808struct i_addr { 809 int is_reg; /* if reg, reg number is in 'disp' */ 810 int disp; 811 char * base; 812 char * index; 813 int ss; 814}; 815 816char * db_index_reg_16[8] = { 817 "%bx,%si", 818 "%bx,%di", 819 "%bp,%si", 820 "%bp,%di", 821 "%si", 822 "%di", 823 "%bp", 824 "%bx" 825}; 826 827char * db_reg[3][8] = { 828 "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh", 829 "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di", 830 "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" 831}; 832 833char * db_seg_reg[8] = { 834 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 835}; 836 837/* 838 * lengths for size attributes 839 */ 840int db_lengths[] = { 841 1, /* BYTE */ 842 2, /* WORD */ 843 4, /* LONG */ 844 8, /* QUAD */ 845 4, /* SNGL */ 846 8, /* DBLR */ 847 10, /* EXTR */ 848}; 849 850#define get_value_inc(result, loc, size, is_signed) \ 851 result = db_get_value((loc), (size), (is_signed)); \ 852 (loc) += (size); 853 854/* 855 * Read address at location and return updated location. 856 */ 857db_addr_t 858db_read_address(loc, short_addr, regmodrm, addrp) 859 db_addr_t loc; 860 int short_addr; 861 int regmodrm; 862 struct i_addr *addrp; /* out */ 863{ 864 int mod, rm, sib, index, ss, disp; 865 866 mod = f_mod(regmodrm); 867 rm = f_rm(regmodrm); 868 869 if (mod == 3) { 870 addrp->is_reg = TRUE; 871 addrp->disp = rm; 872 return (loc); 873 } 874 addrp->is_reg = FALSE; 875 addrp->index = 0; 876 877 if (short_addr) { 878 addrp->index = 0; 879 addrp->ss = 0; 880 switch (mod) { 881 case 0: 882 if (rm == 6) { 883 get_value_inc(disp, loc, 2, TRUE); 884 addrp->disp = disp; 885 addrp->base = 0; 886 } 887 else { 888 addrp->disp = 0; 889 addrp->base = db_index_reg_16[rm]; 890 } 891 break; 892 case 1: 893 get_value_inc(disp, loc, 1, TRUE); 894 addrp->disp = disp; 895 addrp->base = db_index_reg_16[rm]; 896 break; 897 case 2: 898 get_value_inc(disp, loc, 2, TRUE); 899 addrp->disp = disp; 900 addrp->base = db_index_reg_16[rm]; 901 break; 902 } 903 } 904 else { 905 if (mod != 3 && rm == 4) { 906 get_value_inc(sib, loc, 1, FALSE); 907 rm = sib_base(sib); 908 index = sib_index(sib); 909 if (index != 4) 910 addrp->index = db_reg[LONG][index]; 911 addrp->ss = sib_ss(sib); 912 } 913 914 switch (mod) { 915 case 0: 916 if (rm == 5) { 917 get_value_inc(addrp->disp, loc, 4, FALSE); 918 addrp->base = 0; 919 } 920 else { 921 addrp->disp = 0; 922 addrp->base = db_reg[LONG][rm]; 923 } 924 break; 925 926 case 1: 927 get_value_inc(disp, loc, 1, TRUE); 928 addrp->disp = disp; 929 addrp->base = db_reg[LONG][rm]; 930 break; 931 932 case 2: 933 get_value_inc(disp, loc, 4, FALSE); 934 addrp->disp = disp; 935 addrp->base = db_reg[LONG][rm]; 936 break; 937 } 938 } 939 return (loc); 940} 941 942void 943db_print_address(seg, size, addrp) 944 char * seg; 945 int size; 946 struct i_addr *addrp; 947{ 948 if (addrp->is_reg) { 949 db_printf("%s", db_reg[size][addrp->disp]); 950 return; 951 } 952 953 if (seg) { 954 db_printf("%s:", seg); 955 } 956 957 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY); 958 if (addrp->base != 0 || addrp->index != 0) { 959 db_printf("("); 960 if (addrp->base) 961 db_printf("%s", addrp->base); 962 if (addrp->index) 963 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 964 db_printf(")"); 965 } 966} 967 968/* 969 * Disassemble floating-point ("escape") instruction 970 * and return updated location. 971 */ 972db_addr_t 973db_disasm_esc(loc, inst, short_addr, size, seg) 974 db_addr_t loc; 975 int inst; 976 int short_addr; 977 int size; 978 char * seg; 979{ 980 int regmodrm; 981 struct finst *fp; 982 int mod; 983 struct i_addr address; 984 char * name; 985 986 get_value_inc(regmodrm, loc, 1, FALSE); 987 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 988 mod = f_mod(regmodrm); 989 if (mod != 3) { 990 /* 991 * Normal address modes. 992 */ 993 loc = db_read_address(loc, short_addr, regmodrm, &address); 994 db_printf(fp->f_name); 995 switch(fp->f_size) { 996 case SNGL: 997 db_printf("s"); 998 break; 999 case DBLR: 1000 db_printf("l"); 1001 break; 1002 case EXTR: 1003 db_printf("t"); 1004 break; 1005 case WORD: 1006 db_printf("s"); 1007 break; 1008 case LONG: 1009 db_printf("l"); 1010 break; 1011 case QUAD: 1012 db_printf("q"); 1013 break; 1014 default: 1015 break; 1016 } 1017 db_printf("\t"); 1018 db_print_address(seg, BYTE, &address); 1019 } 1020 else { 1021 /* 1022 * 'reg-reg' - special formats 1023 */ 1024 switch (fp->f_rrmode) { 1025 case op2(ST,STI): 1026 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1027 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1028 break; 1029 case op2(STI,ST): 1030 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1031 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1032 break; 1033 case op1(STI): 1034 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1035 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1036 break; 1037 case op1(X): 1038 db_printf("%s", ((char **)fp->f_rrname)[f_rm(regmodrm)]); 1039 break; 1040 case op1(XA): 1041 db_printf("%s\t%%ax", 1042 ((char **)fp->f_rrname)[f_rm(regmodrm)]); 1043 break; 1044 default: 1045 db_printf("<bad instruction>"); 1046 break; 1047 } 1048 } 1049 1050 return (loc); 1051} 1052 1053/* 1054 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1055 * (optional) alternate format. Return address of start of 1056 * next instruction. 1057 */ 1058db_addr_t 1059db_disasm(loc, altfmt) 1060 db_addr_t loc; 1061 boolean_t altfmt; 1062{ 1063 int inst; 1064 int size; 1065 int short_addr; 1066 char * seg; 1067 struct inst * ip; 1068 char * i_name; 1069 int i_size; 1070 int i_mode; 1071 int regmodrm = 0; 1072 boolean_t first; 1073 int displ; 1074 int prefix; 1075 int imm; 1076 int imm2; 1077 int len; 1078 struct i_addr address; 1079 1080 get_value_inc(inst, loc, 1, FALSE); 1081 short_addr = FALSE; 1082 size = LONG; 1083 seg = 0; 1084 1085 /* 1086 * Get prefixes 1087 */ 1088 prefix = TRUE; 1089 do { 1090 switch (inst) { 1091 case 0x66: /* data16 */ 1092 size = WORD; 1093 break; 1094 case 0x67: 1095 short_addr = TRUE; 1096 break; 1097 case 0x26: 1098 seg = "%es"; 1099 break; 1100 case 0x36: 1101 seg = "%ss"; 1102 break; 1103 case 0x2e: 1104 seg = "%cs"; 1105 break; 1106 case 0x3e: 1107 seg = "%ds"; 1108 break; 1109 case 0x64: 1110 seg = "%fs"; 1111 break; 1112 case 0x65: 1113 seg = "%gs"; 1114 break; 1115 case 0xf0: 1116 db_printf("lock "); 1117 break; 1118 case 0xf2: 1119 db_printf("repne "); 1120 break; 1121 case 0xf3: 1122 db_printf("repe "); /* XXX repe VS rep */ 1123 break; 1124 default: 1125 prefix = FALSE; 1126 break; 1127 } 1128 if (prefix) { 1129 get_value_inc(inst, loc, 1, FALSE); 1130 } 1131 } while (prefix); 1132 1133 if (inst >= 0xd8 && inst <= 0xdf) { 1134 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1135 db_printf("\n"); 1136 return (loc); 1137 } 1138 1139 if (inst == 0x0f) { 1140 get_value_inc(inst, loc, 1, FALSE); 1141 ip = db_inst_0f[inst>>4]; 1142 if (ip == 0) { 1143 ip = &db_bad_inst; 1144 } 1145 else { 1146 ip = &ip[inst&0xf]; 1147 } 1148 } 1149 else 1150 ip = &db_inst_table[inst]; 1151 1152 if (ip->i_has_modrm) { 1153 get_value_inc(regmodrm, loc, 1, FALSE); 1154 loc = db_read_address(loc, short_addr, regmodrm, &address); 1155 } 1156 1157 i_name = ip->i_name; 1158 i_size = ip->i_size; 1159 i_mode = ip->i_mode; 1160 1161 if (ip->i_extra == (char *)db_Grp1 || 1162 ip->i_extra == (char *)db_Grp2 || 1163 ip->i_extra == (char *)db_Grp6 || 1164 ip->i_extra == (char *)db_Grp7 || 1165 ip->i_extra == (char *)db_Grp8) { 1166 i_name = ((char **)ip->i_extra)[f_reg(regmodrm)]; 1167 } 1168 else if (ip->i_extra == (char *)db_Grp3) { 1169 ip = (struct inst *)ip->i_extra; 1170 ip = &ip[f_reg(regmodrm)]; 1171 i_name = ip->i_name; 1172 i_mode = ip->i_mode; 1173 } 1174 else if (ip->i_extra == (char *)db_Grp4 || 1175 ip->i_extra == (char *)db_Grp5) { 1176 ip = (struct inst *)ip->i_extra; 1177 ip = &ip[f_reg(regmodrm)]; 1178 i_name = ip->i_name; 1179 i_mode = ip->i_mode; 1180 i_size = ip->i_size; 1181 } 1182 1183 if (i_size == SDEP) { 1184 if (size == WORD) 1185 db_printf(i_name); 1186 else 1187 db_printf(ip->i_extra); 1188 } 1189 else { 1190 db_printf(i_name); 1191 if (i_size != NONE) { 1192 if (i_size == BYTE) { 1193 db_printf("b"); 1194 size = BYTE; 1195 } 1196 else if (i_size == WORD) { 1197 db_printf("w"); 1198 size = WORD; 1199 } 1200 else if (size == WORD) 1201 db_printf("w"); 1202 else 1203 db_printf("l"); 1204 } 1205 } 1206 db_printf("\t"); 1207 for (first = TRUE; 1208 i_mode != 0; 1209 i_mode >>= 8, first = FALSE) 1210 { 1211 if (!first) 1212 db_printf(","); 1213 1214 switch (i_mode & 0xFF) { 1215 1216 case E: 1217 db_print_address(seg, size, &address); 1218 break; 1219 1220 case Eind: 1221 db_printf("*"); 1222 db_print_address(seg, size, &address); 1223 break; 1224 1225 case Ew: 1226 db_print_address(seg, WORD, &address); 1227 break; 1228 1229 case Eb: 1230 db_print_address(seg, BYTE, &address); 1231 break; 1232 1233 case R: 1234 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1235 break; 1236 1237 case Rw: 1238 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1239 break; 1240 1241 case Ri: 1242 db_printf("%s", db_reg[size][f_rm(inst)]); 1243 break; 1244 1245 case S: 1246 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1247 break; 1248 1249 case Si: 1250 db_printf("%s", db_seg_reg[f_reg(inst)]); 1251 break; 1252 1253 case A: 1254 db_printf("%s", db_reg[size][0]); /* acc */ 1255 break; 1256 1257 case BX: 1258 if (seg) 1259 db_printf("%s:", seg); 1260 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1261 break; 1262 1263 case CL: 1264 db_printf("%%cl"); 1265 break; 1266 1267 case DX: 1268 db_printf("%%dx"); 1269 break; 1270 1271 case SI: 1272 if (seg) 1273 db_printf("%s:", seg); 1274 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1275 break; 1276 1277 case DI: 1278 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1279 break; 1280 1281 case CR: 1282 db_printf("%%cr%d", f_reg(regmodrm)); 1283 break; 1284 1285 case DR: 1286 db_printf("%%dr%d", f_reg(regmodrm)); 1287 break; 1288 1289 case TR: 1290 db_printf("%%tr%d", f_reg(regmodrm)); 1291 break; 1292 1293 case I: 1294 len = db_lengths[size]; 1295 get_value_inc(imm, loc, len, FALSE);/* unsigned */ 1296 db_printf("$%#n", imm); 1297 break; 1298 1299 case Is: 1300 len = db_lengths[size]; 1301 get_value_inc(imm, loc, len, TRUE); /* signed */ 1302 db_printf("$%#r", imm); 1303 break; 1304 1305 case Ib: 1306 get_value_inc(imm, loc, 1, FALSE); /* unsigned */ 1307 db_printf("$%#n", imm); 1308 break; 1309 1310 case Ibs: 1311 get_value_inc(imm, loc, 1, TRUE); /* signed */ 1312 db_printf("$%#r", imm); 1313 break; 1314 1315 case Iw: 1316 get_value_inc(imm, loc, 2, FALSE); /* unsigned */ 1317 db_printf("$%#n", imm); 1318 break; 1319 1320 case Il: 1321 get_value_inc(imm, loc, 4, FALSE); 1322 db_printf("$%#n", imm); 1323 break; 1324 1325 case O: 1326 if (short_addr) { 1327 get_value_inc(displ, loc, 2, TRUE); 1328 } 1329 else { 1330 get_value_inc(displ, loc, 4, TRUE); 1331 } 1332 if (seg) 1333 db_printf("%s:%#r",seg, displ); 1334 else 1335 db_printsym((db_addr_t)displ, DB_STGY_ANY); 1336 break; 1337 1338 case Db: 1339 get_value_inc(displ, loc, 1, TRUE); 1340 db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN); 1341 break; 1342 1343 case Dl: 1344 get_value_inc(displ, loc, 4, TRUE); 1345 db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN); 1346 break; 1347 1348 case o1: 1349 db_printf("$1"); 1350 break; 1351 1352 case o3: 1353 db_printf("$3"); 1354 break; 1355 1356 case OS: 1357 get_value_inc(imm, loc, 4, FALSE); /* offset */ 1358 get_value_inc(imm2, loc, 2, FALSE); /* segment */ 1359 db_printf("$%#n,%#n", imm2, imm); 1360 break; 1361 } 1362 } 1363 1364 if (altfmt == 0) { 1365 if (inst == 0xe9 || inst == 0xeb) { 1366 /* 1367 * GAS pads to longword boundary after unconditional jumps. 1368 */ 1369 loc = (loc + (4-1)) & ~(4-1); 1370 } 1371 } 1372 db_printf("\n"); 1373 return (loc); 1374} 1375 1376