db_disasm.c revision 1.2
1/* $OpenBSD: db_disasm.c,v 1.2 2004/02/28 22:22:35 deraadt Exp $ */ 2/* $NetBSD: db_disasm.c,v 1.11 1996/05/03 19:41:58 christos Exp $ */ 3 4/* 5 * Mach Operating System 6 * Copyright (c) 1991,1990 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 * 29 * Id: db_disasm.c,v 2.6 92/01/03 20:05:00 dbg (CMU) 30 */ 31 32/* 33 * Instruction disassembler. 34 */ 35#include <sys/param.h> 36#include <sys/proc.h> 37#include <machine/db_machdep.h> 38 39#include <ddb/db_access.h> 40#include <ddb/db_sym.h> 41#include <ddb/db_output.h> 42#include <ddb/db_interface.h> 43 44/* 45 * Size attributes 46 */ 47#define BYTE 0 48#define WORD 1 49#define LONG 2 50#define QUAD 3 51#define SNGL 4 52#define DBLR 5 53#define EXTR 6 54#define SDEP 7 55#define NONE 8 56 57/* 58 * Addressing modes 59 */ 60#define E 1 /* general effective address */ 61#define Eind 2 /* indirect address (jump, call) */ 62#define Ew 3 /* address, word size */ 63#define Eb 4 /* address, byte size */ 64#define R 5 /* register, in 'reg' field */ 65#define Rw 6 /* word register, in 'reg' field */ 66#define Ri 7 /* register in instruction */ 67#define S 8 /* segment reg, in 'reg' field */ 68#define Si 9 /* segment reg, in instruction */ 69#define A 10 /* accumulator */ 70#define BX 11 /* (bx) */ 71#define CL 12 /* cl, for shifts */ 72#define DX 13 /* dx, for IO */ 73#define SI 14 /* si */ 74#define DI 15 /* di */ 75#define CR 16 /* control register */ 76#define DR 17 /* debug register */ 77#define TR 18 /* test register */ 78#define I 19 /* immediate, unsigned */ 79#define Is 20 /* immediate, signed */ 80#define Ib 21 /* byte immediate, unsigned */ 81#define Ibs 22 /* byte immediate, signed */ 82#define Iw 23 /* word immediate, unsigned */ 83#define O 25 /* direct address */ 84#define Db 26 /* byte displacement from EIP */ 85#define Dl 27 /* long displacement from EIP */ 86#define o1 28 /* constant 1 */ 87#define o3 29 /* constant 3 */ 88#define OS 30 /* immediate offset/segment */ 89#define ST 31 /* FP stack top */ 90#define STI 32 /* FP stack */ 91#define X 33 /* extended FP op */ 92#define XA 34 /* for 'fstcw %ax' */ 93#define El 35 /* address, long size */ 94#define Ril 36 /* long register in instruction */ 95#define Iba 37 /* byte immediate, don't print if 0xa */ 96 97struct inst { 98 char * i_name; /* name */ 99 short i_has_modrm; /* has regmodrm byte */ 100 short i_size; /* operand size */ 101 int i_mode; /* addressing modes */ 102 void * i_extra; /* pointer to extra opcode table */ 103}; 104 105#define op1(x) (x) 106#define op2(x,y) ((x)|((y)<<8)) 107#define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 108 109struct finst { 110 char * f_name; /* name for memory instruction */ 111 int f_size; /* size for memory instruction */ 112 int f_rrmode; /* mode for rr instruction */ 113 void * f_rrname; /* name for rr instruction 114 (or pointer to table) */ 115}; 116 117char * db_Grp6[] = { 118 "sldt", "str", "lldt", "ltr", 119 "verr", "verw", "", "" 120}; 121 122char * db_Grp7[] = { 123 "sgdt", "sidt", "lgdt", "lidt", 124 "smsw", "", "lmsw", "invlpg" 125}; 126 127char * db_Grp8[] = { 128 "", "", "", "", 129 "bt", "bts", "btr", "btc" 130}; 131 132char * db_Grp9[] = { 133 "fxsave", "fxrstor", "", "", 134 "", "", "", "" 135}; 136 137char * db_GrpA[] = { 138 "", "cmpxchg8b", "", "", 139 "", "", "", "" 140}; 141 142char * db_GrpB[] = { 143 "xstore-rng", "xcrypt-ecb", "xcrypt-cbc", "", 144 "xcrypt-cfb", "xcrypt-ofb", "", "" 145}; 146 147struct inst db_inst_0f0x[] = { 148/*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 }, 149/*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 }, 150/*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, 151/*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, 152/*04*/ { "", FALSE, NONE, 0, 0 }, 153/*05*/ { "", FALSE, NONE, 0, 0 }, 154/*06*/ { "clts", FALSE, NONE, 0, 0 }, 155/*07*/ { "", FALSE, NONE, 0, 0 }, 156 157/*08*/ { "invd", FALSE, NONE, 0, 0 }, 158/*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, 159/*0a*/ { "", FALSE, NONE, 0, 0 }, 160/*0b*/ { "", FALSE, NONE, 0, 0 }, 161/*0c*/ { "", FALSE, NONE, 0, 0 }, 162/*0d*/ { "", FALSE, NONE, 0, 0 }, 163/*0e*/ { "", FALSE, NONE, 0, 0 }, 164/*0f*/ { "", FALSE, NONE, 0, 0 }, 165}; 166 167struct inst db_inst_0f2x[] = { 168/*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */ 169/*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */ 170/*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 }, 171/*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 }, 172/*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 }, 173/*25*/ { "", FALSE, NONE, 0, 0 }, 174/*26*/ { "mov", TRUE, LONG, op2(E,TR), 0 }, 175/*27*/ { "", FALSE, NONE, 0, 0 }, 176 177/*28*/ { "", FALSE, NONE, 0, 0 }, 178/*29*/ { "", FALSE, NONE, 0, 0 }, 179/*2a*/ { "", FALSE, NONE, 0, 0 }, 180/*2b*/ { "", FALSE, NONE, 0, 0 }, 181/*2c*/ { "", FALSE, NONE, 0, 0 }, 182/*2d*/ { "", FALSE, NONE, 0, 0 }, 183/*2e*/ { "", FALSE, NONE, 0, 0 }, 184/*2f*/ { "", FALSE, NONE, 0, 0 }, 185}; 186 187struct inst db_inst_0f3x[] = { 188/*30*/ { "wrmsr", FALSE, NONE, 0, 0 }, 189/*31*/ { "rdtsc", FALSE, NONE, 0, 0 }, 190/*32*/ { "rdmsr", FALSE, NONE, 0, 0 }, 191/*33*/ { "rdpmc", FALSE, NONE, 0, 0 }, 192/*34*/ { "", FALSE, NONE, 0, 0 }, 193/*35*/ { "", FALSE, NONE, 0, 0 }, 194/*36*/ { "", FALSE, NONE, 0, 0 }, 195/*37*/ { "", FALSE, NONE, 0, 0 }, 196 197/*38*/ { "", FALSE, NONE, 0, 0 }, 198/*39*/ { "", FALSE, NONE, 0, 0 }, 199/*3a*/ { "", FALSE, NONE, 0, 0 }, 200/*3b*/ { "", FALSE, NONE, 0, 0 }, 201/*3c*/ { "", FALSE, NONE, 0, 0 }, 202/*3d*/ { "", FALSE, NONE, 0, 0 }, 203/*3e*/ { "", FALSE, NONE, 0, 0 }, 204/*3f*/ { "", FALSE, NONE, 0, 0 }, 205}; 206 207struct inst db_inst_0f8x[] = { 208/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, 209/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, 210/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, 211/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, 212/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, 213/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, 214/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, 215/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, 216 217/*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, 218/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, 219/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, 220/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, 221/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, 222/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, 223/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, 224/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, 225}; 226 227struct inst db_inst_0f9x[] = { 228/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, 229/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, 230/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, 231/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, 232/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, 233/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, 234/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, 235/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, 236 237/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, 238/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, 239/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, 240/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, 241/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, 242/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, 243/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, 244/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, 245}; 246 247struct inst db_inst_0fax[] = { 248/*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, 249/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, 250/*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, 251/*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 }, 252/*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 }, 253/*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 }, 254/*a6*/ { "", FALSE, NONE, 0, 0 }, 255/*a7*/ { "", TRUE, NONE, 0, db_GrpB }, 256 257/*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, 258/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, 259/*aa*/ { "", FALSE, NONE, 0, 0 }, 260/*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 }, 261/*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 }, 262/*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 }, 263/*ae*/ { "", TRUE, NONE, op1(E), db_Grp9 }, 264/*af*/ { "imul", TRUE, LONG, op2(E,R), 0 }, 265}; 266 267struct inst db_inst_0fbx[] = { 268/*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, 269/*b1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, 270/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, 271/*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 }, 272/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, 273/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, 274/*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 }, 275/*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 }, 276 277/*b8*/ { "", FALSE, NONE, 0, 0 }, 278/*b9*/ { "", FALSE, NONE, 0, 0 }, 279/*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 }, 280/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, 281/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, 282/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, 283/*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 }, 284/*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 }, 285}; 286 287struct inst db_inst_0fcx[] = { 288/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, 289/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, 290/*c2*/ { "", FALSE, NONE, 0, 0 }, 291/*c3*/ { "", FALSE, NONE, 0, 0 }, 292/*c4*/ { "", FALSE, NONE, 0, 0 }, 293/*c5*/ { "", FALSE, NONE, 0, 0 }, 294/*c6*/ { "", FALSE, NONE, 0, 0 }, 295/*c7*/ { "", TRUE, NONE, op1(E), db_GrpA }, 296 297/*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 298/*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 299/*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 300/*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 301/*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 302/*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 303/*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 304/*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, 305}; 306 307struct inst *db_inst_0f[] = { 308 db_inst_0f0x, 309 NULL, 310 db_inst_0f2x, 311 db_inst_0f3x, 312 NULL, 313 NULL, 314 NULL, 315 NULL, 316 db_inst_0f8x, 317 db_inst_0f9x, 318 db_inst_0fax, 319 db_inst_0fbx, 320 db_inst_0fcx, 321 NULL, 322 NULL, 323 NULL 324}; 325 326char * db_Esc92[] = { 327 "fnop", "", "", "", 328 "", "", "", "" 329}; 330char * db_Esc94[] = { 331 "fchs", "fabs", "", "", 332 "ftst", "fxam", "", "" 333}; 334char * db_Esc95[] = { 335 "fld1", "fldl2t", "fldl2e", "fldpi", 336 "fldlg2", "fldln2", "fldz", "" 337}; 338char * db_Esc96[] = { 339 "f2xm1", "fyl2x", "fptan", "fpatan", 340 "fxtract", "fprem1", "fdecstp", "fincstp" 341}; 342char * db_Esc97[] = { 343 "fprem", "fyl2xp1", "fsqrt", "fsincos", 344 "frndint", "fscale", "fsin", "fcos" 345}; 346 347char * db_Esca5[] = { 348 "", "fucompp", "", "", 349 "", "", "", "" 350}; 351 352char * db_Escb4[] = { 353 "fneni", "fndisi", "fnclex", "fninit", 354 "fsetpm", "", "", "" 355}; 356 357char * db_Esce3[] = { 358 "", "fcompp", "", "", 359 "", "", "", "" 360}; 361 362char * db_Escf4[] = { 363 "fnstsw", "", "", "", 364 "", "", "", "" 365}; 366 367struct finst db_Esc8[] = { 368/*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 369/*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 370/*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 371/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 372/*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 373/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 374/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 375/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 376}; 377 378struct finst db_Esc9[] = { 379/*0*/ { "fld", SNGL, op1(STI), 0 }, 380/*1*/ { "", NONE, op1(STI), "fxch" }, 381/*2*/ { "fst", SNGL, op1(X), db_Esc92 }, 382/*3*/ { "fstp", SNGL, op1(X), 0 }, 383/*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, 384/*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, 385/*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, 386/*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, 387}; 388 389struct finst db_Esca[] = { 390/*0*/ { "fiadd", LONG, 0, 0 }, 391/*1*/ { "fimul", LONG, 0, 0 }, 392/*2*/ { "ficom", LONG, 0, 0 }, 393/*3*/ { "ficomp", LONG, 0, 0 }, 394/*4*/ { "fisub", LONG, op1(X), 0 }, 395/*5*/ { "fisubr", LONG, 0, 0 }, 396/*6*/ { "fidiv", LONG, 0, 0 }, 397/*7*/ { "fidivr", LONG, 0, 0 } 398}; 399 400struct finst db_Escb[] = { 401/*0*/ { "fild", LONG, 0, 0 }, 402/*1*/ { "", NONE, 0, 0 }, 403/*2*/ { "fist", LONG, 0, 0 }, 404/*3*/ { "fistp", LONG, 0, 0 }, 405/*4*/ { "", WORD, op1(X), db_Escb4 }, 406/*5*/ { "fld", EXTR, 0, 0 }, 407/*6*/ { "", WORD, 0, 0 }, 408/*7*/ { "fstp", EXTR, 0, 0 }, 409}; 410 411struct finst db_Escc[] = { 412/*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 413/*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 414/*2*/ { "fcom", DBLR, 0, 0 }, 415/*3*/ { "fcomp", DBLR, 0, 0 }, 416/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 417/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 418/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 419/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 420}; 421 422struct finst db_Escd[] = { 423/*0*/ { "fld", DBLR, op1(STI), "ffree" }, 424/*1*/ { "", NONE, 0, 0 }, 425/*2*/ { "fst", DBLR, op1(STI), 0 }, 426/*3*/ { "fstp", DBLR, op1(STI), 0 }, 427/*4*/ { "frstor", NONE, op1(STI), "fucom" }, 428/*5*/ { "", NONE, op1(STI), "fucomp" }, 429/*6*/ { "fnsave", NONE, 0, 0 }, 430/*7*/ { "fnstsw", NONE, 0, 0 }, 431}; 432 433struct finst db_Esce[] = { 434/*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" }, 435/*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" }, 436/*2*/ { "ficom", WORD, 0, 0 }, 437/*3*/ { "ficomp", WORD, op1(X), db_Esce3 }, 438/*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" }, 439/*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" }, 440/*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" }, 441/*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" }, 442}; 443 444struct finst db_Escf[] = { 445/*0*/ { "fild", WORD, 0, 0 }, 446/*1*/ { "", WORD, 0, 0 }, 447/*2*/ { "fist", WORD, 0, 0 }, 448/*3*/ { "fistp", WORD, 0, 0 }, 449/*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, 450/*5*/ { "fild", QUAD, 0, 0 }, 451/*6*/ { "fbstp", NONE, 0, 0 }, 452/*7*/ { "fistp", QUAD, 0, 0 }, 453}; 454 455struct finst *db_Esc_inst[] = { 456 db_Esc8, db_Esc9, db_Esca, db_Escb, 457 db_Escc, db_Escd, db_Esce, db_Escf 458}; 459 460char * db_Grp1[] = { 461 "add", 462 "or", 463 "adc", 464 "sbb", 465 "and", 466 "sub", 467 "xor", 468 "cmp" 469}; 470 471char * db_Grp2[] = { 472 "rol", 473 "ror", 474 "rcl", 475 "rcr", 476 "shl", 477 "shr", 478 "shl", 479 "sar" 480}; 481 482struct inst db_Grp3[] = { 483 { "test", TRUE, NONE, op2(I,E), 0 }, 484 { "test", TRUE, NONE, op2(I,E), 0 }, 485 { "not", TRUE, NONE, op1(E), 0 }, 486 { "neg", TRUE, NONE, op1(E), 0 }, 487 { "mul", TRUE, NONE, op2(E,A), 0 }, 488 { "imul", TRUE, NONE, op2(E,A), 0 }, 489 { "div", TRUE, NONE, op2(E,A), 0 }, 490 { "idiv", TRUE, NONE, op2(E,A), 0 }, 491}; 492 493struct inst db_Grp4[] = { 494 { "inc", TRUE, BYTE, op1(E), 0 }, 495 { "dec", TRUE, BYTE, op1(E), 0 }, 496 { "", TRUE, NONE, 0, 0 }, 497 { "", TRUE, NONE, 0, 0 }, 498 { "", TRUE, NONE, 0, 0 }, 499 { "", TRUE, NONE, 0, 0 }, 500 { "", TRUE, NONE, 0, 0 }, 501 { "", TRUE, NONE, 0, 0 } 502}; 503 504struct inst db_Grp5[] = { 505 { "inc", TRUE, LONG, op1(E), 0 }, 506 { "dec", TRUE, LONG, op1(E), 0 }, 507 { "call", TRUE, NONE, op1(Eind),0 }, 508 { "lcall", TRUE, NONE, op1(Eind),0 }, 509 { "jmp", TRUE, NONE, op1(Eind),0 }, 510 { "ljmp", TRUE, NONE, op1(Eind),0 }, 511 { "push", TRUE, LONG, op1(E), 0 }, 512 { "", TRUE, NONE, 0, 0 } 513}; 514 515struct inst db_inst_table[256] = { 516/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, 517/*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, 518/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, 519/*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, 520/*04*/ { "add", FALSE, BYTE, op2(I, A), 0 }, 521/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, 522/*06*/ { "push", FALSE, NONE, op1(Si), 0 }, 523/*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, 524 525/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, 526/*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, 527/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, 528/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, 529/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, 530/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, 531/*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, 532/*0f*/ { "", FALSE, NONE, 0, 0 }, 533 534/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, 535/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, 536/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, 537/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, 538/*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 }, 539/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, 540/*16*/ { "push", FALSE, NONE, op1(Si), 0 }, 541/*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, 542 543/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, 544/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, 545/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, 546/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, 547/*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 }, 548/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, 549/*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, 550/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, 551 552/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, 553/*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, 554/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, 555/*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, 556/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, 557/*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, 558/*26*/ { "", FALSE, NONE, 0, 0 }, 559/*27*/ { "aaa", FALSE, NONE, 0, 0 }, 560 561/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, 562/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, 563/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, 564/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, 565/*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 }, 566/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, 567/*2e*/ { "", FALSE, NONE, 0, 0 }, 568/*2f*/ { "das", FALSE, NONE, 0, 0 }, 569 570/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, 571/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, 572/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, 573/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, 574/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, 575/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, 576/*36*/ { "", FALSE, NONE, 0, 0 }, 577/*37*/ { "daa", FALSE, NONE, 0, 0 }, 578 579/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, 580/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, 581/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, 582/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, 583/*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 }, 584/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, 585/*3e*/ { "", FALSE, NONE, 0, 0 }, 586/*3f*/ { "aas", FALSE, NONE, 0, 0 }, 587 588/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 589/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 590/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 591/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 592/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 593/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 594/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 595/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, 596 597/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 598/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 599/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 600/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 601/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 602/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 603/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 604/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, 605 606/*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, 607/*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, 608/*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, 609/*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, 610/*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, 611/*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, 612/*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, 613/*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, 614 615/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 616/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 617/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 618/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 619/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 620/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 621/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 622/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, 623 624/*60*/ { "pusha", FALSE, LONG, 0, 0 }, 625/*61*/ { "popa", FALSE, LONG, 0, 0 }, 626/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, 627/*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 }, 628/*64*/ { "", FALSE, NONE, 0, 0 }, 629/*65*/ { "", FALSE, NONE, 0, 0 }, 630/*66*/ { "", FALSE, NONE, 0, 0 }, 631/*67*/ { "", FALSE, NONE, 0, 0 }, 632 633/*68*/ { "push", FALSE, LONG, op1(I), 0 }, 634/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, 635/*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 }, 636/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, 637/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, 638/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, 639/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, 640/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, 641 642/*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, 643/*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, 644/*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, 645/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, 646/*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, 647/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, 648/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, 649/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, 650 651/*78*/ { "js", FALSE, NONE, op1(Db), 0 }, 652/*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, 653/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, 654/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, 655/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, 656/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, 657/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, 658/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, 659 660/*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 661/*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 }, 662/*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, 663/*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 }, 664/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, 665/*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, 666/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, 667/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, 668 669/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, 670/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, 671/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, 672/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, 673/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, 674/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, 675/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, 676/*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, 677 678/*90*/ { "nop", FALSE, NONE, 0, 0 }, 679/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 680/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 681/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 682/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 683/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 684/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 685/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, 686 687/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ 688/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ 689/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, 690/*9b*/ { "wait", FALSE, NONE, 0, 0 }, 691/*9c*/ { "pushf", FALSE, LONG, 0, 0 }, 692/*9d*/ { "popf", FALSE, LONG, 0, 0 }, 693/*9e*/ { "sahf", FALSE, NONE, 0, 0 }, 694/*9f*/ { "lahf", FALSE, NONE, 0, 0 }, 695 696/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, 697/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, 698/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, 699/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, 700/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, 701/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, 702/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, 703/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, 704 705/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, 706/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, 707/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, 708/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, 709/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, 710/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, 711/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, 712/*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, 713 714/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 715/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 716/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 717/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 718/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 719/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 720/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 721/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, 722 723/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 724/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 725/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 726/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 727/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 728/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 729/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 730/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, 731 732/*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 }, 733/*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 }, 734/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, 735/*c3*/ { "ret", FALSE, NONE, 0, 0 }, 736/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, 737/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, 738/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, 739/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, 740 741/*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 }, 742/*c9*/ { "leave", FALSE, NONE, 0, 0 }, 743/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, 744/*cb*/ { "lret", FALSE, NONE, 0, 0 }, 745/*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, 746/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, 747/*ce*/ { "into", FALSE, NONE, 0, 0 }, 748/*cf*/ { "iret", FALSE, NONE, 0, 0 }, 749 750/*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 }, 751/*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 }, 752/*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 }, 753/*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 }, 754/*d4*/ { "aam", TRUE, NONE, op1(Iba), 0 }, 755/*d5*/ { "aad", TRUE, NONE, op1(Iba), 0 }, 756/*d6*/ { ".byte\t0xd6",FALSE, NONE, 0, 0 }, 757/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, 758 759/*d8*/ { "", TRUE, NONE, 0, db_Esc8 }, 760/*d9*/ { "", TRUE, NONE, 0, db_Esc9 }, 761/*da*/ { "", TRUE, NONE, 0, db_Esca }, 762/*db*/ { "", TRUE, NONE, 0, db_Escb }, 763/*dc*/ { "", TRUE, NONE, 0, db_Escc }, 764/*dd*/ { "", TRUE, NONE, 0, db_Escd }, 765/*de*/ { "", TRUE, NONE, 0, db_Esce }, 766/*df*/ { "", TRUE, NONE, 0, db_Escf }, 767 768/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, 769/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, 770/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, 771/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, 772/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, 773/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, 774/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, 775/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, 776 777/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, 778/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, 779/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, 780/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, 781/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, 782/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, 783/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, 784/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, 785 786/*f0*/ { "", FALSE, NONE, 0, 0 }, 787/*f1*/ { "", FALSE, NONE, 0, 0 }, 788/*f2*/ { "", FALSE, NONE, 0, 0 }, 789/*f3*/ { "", FALSE, NONE, 0, 0 }, 790/*f4*/ { "hlt", FALSE, NONE, 0, 0 }, 791/*f5*/ { "cmc", FALSE, NONE, 0, 0 }, 792/*f6*/ { "", TRUE, BYTE, 0, db_Grp3 }, 793/*f7*/ { "", TRUE, LONG, 0, db_Grp3 }, 794 795/*f8*/ { "clc", FALSE, NONE, 0, 0 }, 796/*f9*/ { "stc", FALSE, NONE, 0, 0 }, 797/*fa*/ { "cli", FALSE, NONE, 0, 0 }, 798/*fb*/ { "sti", FALSE, NONE, 0, 0 }, 799/*fc*/ { "cld", FALSE, NONE, 0, 0 }, 800/*fd*/ { "std", FALSE, NONE, 0, 0 }, 801/*fe*/ { "", TRUE, NONE, 0, db_Grp4 }, 802/*ff*/ { "", TRUE, NONE, 0, db_Grp5 }, 803}; 804 805struct inst db_bad_inst = 806 { "???", FALSE, NONE, 0, 0 } 807; 808 809#define f_mod(byte) ((byte)>>6) 810#define f_reg(byte) (((byte)>>3)&0x7) 811#define f_rm(byte) ((byte)&0x7) 812 813#define sib_ss(byte) ((byte)>>6) 814#define sib_index(byte) (((byte)>>3)&0x7) 815#define sib_base(byte) ((byte)&0x7) 816 817struct i_addr { 818 int is_reg; /* if reg, reg number is in 'disp' */ 819 int disp; 820 char * base; 821 char * index; 822 int ss; 823}; 824 825char * db_index_reg_16[8] = { 826 "%bx,%si", 827 "%bx,%di", 828 "%bp,%si", 829 "%bp,%di", 830 "%si", 831 "%di", 832 "%bp", 833 "%bx" 834}; 835 836char * db_reg[3][8] = { 837 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, 838 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, 839 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } 840}; 841 842char * db_seg_reg[8] = { 843 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 844}; 845 846/* 847 * lengths for size attributes 848 */ 849int db_lengths[] = { 850 1, /* BYTE */ 851 2, /* WORD */ 852 4, /* LONG */ 853 8, /* QUAD */ 854 4, /* SNGL */ 855 8, /* DBLR */ 856 10, /* EXTR */ 857}; 858 859#define get_value_inc(result, loc, size, is_signed) \ 860 do { \ 861 result = db_get_value((loc), (size), (is_signed)); \ 862 (loc) += (size); \ 863 } while (0) 864 865 866db_addr_t db_read_address(db_addr_t, int, int, struct i_addr *); 867void db_print_address(char *, int, struct i_addr *); 868db_addr_t db_disasm_esc(db_addr_t, int, int, int, char *); 869 870/* 871 * Read address at location and return updated location. 872 */ 873db_addr_t 874db_read_address(loc, short_addr, regmodrm, addrp) 875 db_addr_t loc; 876 int short_addr; 877 int regmodrm; 878 struct i_addr *addrp; /* out */ 879{ 880 int mod, rm, sib, index, disp; 881 882 mod = f_mod(regmodrm); 883 rm = f_rm(regmodrm); 884 885 if (mod == 3) { 886 addrp->is_reg = TRUE; 887 addrp->disp = rm; 888 return (loc); 889 } 890 addrp->is_reg = FALSE; 891 addrp->index = 0; 892 893 if (short_addr) { 894 addrp->index = 0; 895 addrp->ss = 0; 896 switch (mod) { 897 case 0: 898 if (rm == 6) { 899 get_value_inc(disp, loc, 2, FALSE); 900 addrp->disp = disp; 901 addrp->base = 0; 902 } else { 903 addrp->disp = 0; 904 addrp->base = db_index_reg_16[rm]; 905 } 906 break; 907 case 1: 908 get_value_inc(disp, loc, 1, TRUE); 909 disp &= 0xffff; 910 addrp->disp = disp; 911 addrp->base = db_index_reg_16[rm]; 912 break; 913 case 2: 914 get_value_inc(disp, loc, 2, FALSE); 915 addrp->disp = disp; 916 addrp->base = db_index_reg_16[rm]; 917 break; 918 } 919 } else { 920 if (rm == 4) { 921 get_value_inc(sib, loc, 1, FALSE); 922 rm = sib_base(sib); 923 index = sib_index(sib); 924 if (index != 4) 925 addrp->index = db_reg[LONG][index]; 926 addrp->ss = sib_ss(sib); 927 } 928 929 switch (mod) { 930 case 0: 931 if (rm == 5) { 932 get_value_inc(addrp->disp, loc, 4, FALSE); 933 addrp->base = 0; 934 } else { 935 addrp->disp = 0; 936 addrp->base = db_reg[LONG][rm]; 937 } 938 break; 939 case 1: 940 get_value_inc(disp, loc, 1, TRUE); 941 addrp->disp = disp; 942 addrp->base = db_reg[LONG][rm]; 943 break; 944 case 2: 945 get_value_inc(disp, loc, 4, FALSE); 946 addrp->disp = disp; 947 addrp->base = db_reg[LONG][rm]; 948 break; 949 } 950 } 951 return (loc); 952} 953 954void 955db_print_address(seg, size, addrp) 956 char * seg; 957 int size; 958 struct i_addr *addrp; 959{ 960 if (addrp->is_reg) { 961 db_printf("%s", db_reg[size][addrp->disp]); 962 return; 963 } 964 965 if (seg) 966 db_printf("%s:", seg); 967 968 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY, db_printf); 969 if (addrp->base != 0 || addrp->index != 0) { 970 db_printf("("); 971 if (addrp->base) 972 db_printf("%s", addrp->base); 973 if (addrp->index) 974 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 975 db_printf(")"); 976 } 977} 978 979/* 980 * Disassemble floating-point ("escape") instruction 981 * and return updated location. 982 */ 983db_addr_t 984db_disasm_esc(loc, inst, short_addr, size, seg) 985 db_addr_t loc; 986 int inst; 987 int short_addr; 988 int size; 989 char * seg; 990{ 991 int regmodrm; 992 struct finst *fp; 993 int mod; 994 struct i_addr address; 995 char * name; 996 997 get_value_inc(regmodrm, loc, 1, FALSE); 998 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 999 mod = f_mod(regmodrm); 1000 if (mod != 3) { 1001 if (*fp->f_name == '\0') { 1002 db_printf("<bad instruction>"); 1003 return (loc); 1004 } 1005 1006 /* 1007 * Normal address modes. 1008 */ 1009 loc = db_read_address(loc, short_addr, regmodrm, &address); 1010 db_printf(fp->f_name); 1011 switch(fp->f_size) { 1012 case SNGL: 1013 db_printf("s"); 1014 break; 1015 case DBLR: 1016 db_printf("l"); 1017 break; 1018 case EXTR: 1019 db_printf("t"); 1020 break; 1021 case WORD: 1022 db_printf("s"); 1023 break; 1024 case LONG: 1025 db_printf("l"); 1026 break; 1027 case QUAD: 1028 db_printf("q"); 1029 break; 1030 default: 1031 break; 1032 } 1033 db_printf("\t"); 1034 db_print_address(seg, BYTE, &address); 1035 } else { 1036 /* 1037 * 'reg-reg' - special formats 1038 */ 1039 switch (fp->f_rrmode) { 1040 case op2(ST,STI): 1041 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1042 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); 1043 break; 1044 case op2(STI,ST): 1045 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1046 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); 1047 break; 1048 case op1(STI): 1049 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1050 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); 1051 break; 1052 case op1(X): 1053 name = ((char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1054 if (*name == '\0') 1055 goto bad; 1056 db_printf("%s", name); 1057 break; 1058 case op1(XA): 1059 name = ((char * const *)fp->f_rrname)[f_rm(regmodrm)]; 1060 if (*name == '\0') 1061 goto bad; 1062 db_printf("%s\t%%ax", name); 1063 break; 1064 default: 1065 bad: 1066 db_printf("<bad instruction>"); 1067 break; 1068 } 1069 } 1070 1071 return (loc); 1072} 1073 1074/* 1075 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1076 * (optional) alternate format. Return address of start of 1077 * next instruction. 1078 */ 1079db_addr_t 1080db_disasm(loc, altfmt) 1081 db_addr_t loc; 1082 boolean_t altfmt; 1083{ 1084 int inst; 1085 int size; 1086 int short_addr; 1087 char * seg; 1088 struct inst * ip; 1089 char * i_name; 1090 int i_size; 1091 int i_mode; 1092 int regmodrm = 0; 1093 boolean_t first; 1094 int displ; 1095 int prefix; 1096 int imm; 1097 int imm2; 1098 int len; 1099 struct i_addr address; 1100 1101 get_value_inc(inst, loc, 1, FALSE); 1102 short_addr = FALSE; 1103 size = LONG; 1104 seg = 0; 1105 1106 /* 1107 * Get prefixes 1108 */ 1109 prefix = TRUE; 1110 do { 1111 switch (inst) { 1112 case 0x66: /* data16 */ 1113 size = WORD; 1114 break; 1115 case 0x67: 1116 short_addr = TRUE; 1117 break; 1118 case 0x26: 1119 seg = "%es"; 1120 break; 1121 case 0x36: 1122 seg = "%ss"; 1123 break; 1124 case 0x2e: 1125 seg = "%cs"; 1126 break; 1127 case 0x3e: 1128 seg = "%ds"; 1129 break; 1130 case 0x64: 1131 seg = "%fs"; 1132 break; 1133 case 0x65: 1134 seg = "%gs"; 1135 break; 1136 case 0xf0: 1137 db_printf("lock "); 1138 break; 1139 case 0xf2: 1140 db_printf("repne "); 1141 break; 1142 case 0xf3: 1143 db_printf("repe "); /* XXX repe VS rep */ 1144 break; 1145 default: 1146 prefix = FALSE; 1147 break; 1148 } 1149 if (prefix) 1150 get_value_inc(inst, loc, 1, FALSE); 1151 } while (prefix); 1152 1153 if (inst >= 0xd8 && inst <= 0xdf) { 1154 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1155 db_printf("\n"); 1156 return (loc); 1157 } 1158 1159 if (inst == 0x0f) { 1160 get_value_inc(inst, loc, 1, FALSE); 1161 ip = db_inst_0f[inst>>4]; 1162 if (ip == 0) 1163 ip = &db_bad_inst; 1164 else 1165 ip = &ip[inst&0xf]; 1166 } else { 1167 ip = &db_inst_table[inst]; 1168 } 1169 1170 if (ip->i_has_modrm) { 1171 get_value_inc(regmodrm, loc, 1, FALSE); 1172 loc = db_read_address(loc, short_addr, regmodrm, &address); 1173 } 1174 1175 i_name = ip->i_name; 1176 i_size = ip->i_size; 1177 i_mode = ip->i_mode; 1178 1179 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 || 1180 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 || 1181 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 || 1182 ip->i_extra == db_GrpA || ip->i_extra == db_GrpB) { 1183 i_name = ((char **)ip->i_extra)[f_reg(regmodrm)]; 1184 } else if (ip->i_extra == db_Grp3) { 1185 ip = (struct inst *)ip->i_extra; 1186 ip = &ip[f_reg(regmodrm)]; 1187 i_name = ip->i_name; 1188 i_mode = ip->i_mode; 1189 } else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) { 1190 ip = (struct inst *)ip->i_extra; 1191 ip = &ip[f_reg(regmodrm)]; 1192 i_name = ip->i_name; 1193 i_mode = ip->i_mode; 1194 i_size = ip->i_size; 1195 } 1196 1197 if (i_size == SDEP) { 1198 if (size == WORD) 1199 db_printf("%s", i_name); 1200 else 1201 db_printf("%s", ip->i_extra); 1202 } else { 1203 db_printf("%s", i_name); 1204 if (i_size != NONE) { 1205 if (i_size == BYTE) { 1206 db_printf("b"); 1207 size = BYTE; 1208 } else if (i_size == WORD) { 1209 db_printf("w"); 1210 size = WORD; 1211 } else if (size == WORD) { 1212 db_printf("w"); 1213 } else { 1214 db_printf("l"); 1215 } 1216 } 1217 } 1218 db_printf("\t"); 1219 for (first = TRUE; 1220 i_mode != 0; 1221 i_mode >>= 8, first = FALSE) { 1222 if (!first) 1223 db_printf(","); 1224 1225 switch (i_mode & 0xFF) { 1226 case E: 1227 db_print_address(seg, size, &address); 1228 break; 1229 case Eind: 1230 db_printf("*"); 1231 db_print_address(seg, size, &address); 1232 break; 1233 case El: 1234 db_print_address(seg, LONG, &address); 1235 break; 1236 case Ew: 1237 db_print_address(seg, WORD, &address); 1238 break; 1239 case Eb: 1240 db_print_address(seg, BYTE, &address); 1241 break; 1242 case R: 1243 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1244 break; 1245 case Rw: 1246 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1247 break; 1248 case Ri: 1249 db_printf("%s", db_reg[size][f_rm(inst)]); 1250 break; 1251 case Ril: 1252 db_printf("%s", db_reg[LONG][f_rm(inst)]); 1253 break; 1254 case S: 1255 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1256 break; 1257 case Si: 1258 db_printf("%s", db_seg_reg[f_reg(inst)]); 1259 break; 1260 case A: 1261 db_printf("%s", db_reg[size][0]); /* acc */ 1262 break; 1263 case BX: 1264 if (seg) 1265 db_printf("%s:", seg); 1266 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1267 break; 1268 case CL: 1269 db_printf("%%cl"); 1270 break; 1271 case DX: 1272 db_printf("%%dx"); 1273 break; 1274 case SI: 1275 if (seg) 1276 db_printf("%s:", seg); 1277 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1278 break; 1279 case DI: 1280 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1281 break; 1282 case CR: 1283 db_printf("%%cr%d", f_reg(regmodrm)); 1284 break; 1285 case DR: 1286 db_printf("%%dr%d", f_reg(regmodrm)); 1287 break; 1288 case TR: 1289 db_printf("%%tr%d", f_reg(regmodrm)); 1290 break; 1291 case I: 1292 len = db_lengths[size]; 1293 get_value_inc(imm, loc, len, FALSE); 1294 db_printf("$%#n", imm); 1295 break; 1296 case Is: 1297 len = db_lengths[size]; 1298 get_value_inc(imm, loc, len, TRUE); 1299 db_printf("$%#r", imm); 1300 break; 1301 case Ib: 1302 get_value_inc(imm, loc, 1, FALSE); 1303 db_printf("$%#n", imm); 1304 break; 1305 case Iba: 1306 get_value_inc(imm, loc, 1, FALSE); 1307 if (imm != 0x0a) 1308 db_printf("$%#n", imm); 1309 break; 1310 case Ibs: 1311 get_value_inc(imm, loc, 1, TRUE); 1312 if (size == WORD) 1313 imm &= 0xFFFF; 1314 db_printf("$%#r", imm); 1315 break; 1316 case Iw: 1317 get_value_inc(imm, loc, 2, FALSE); 1318 db_printf("$%#n", imm); 1319 break; 1320 case O: 1321 if (short_addr) 1322 get_value_inc(displ, loc, 2, TRUE); 1323 else 1324 get_value_inc(displ, loc, 4, TRUE); 1325 if (seg) 1326 db_printf("%s:%#r",seg, displ); 1327 else 1328 db_printsym((db_addr_t)displ, DB_STGY_ANY, 1329 db_printf); 1330 break; 1331 case Db: 1332 get_value_inc(displ, loc, 1, TRUE); 1333 displ += loc; 1334 if (size == WORD) 1335 displ &= 0xFFFF; 1336 db_printsym((db_addr_t)displ, DB_STGY_XTRN, db_printf); 1337 break; 1338 case Dl: 1339 len = db_lengths[size]; 1340 get_value_inc(displ, loc, len, FALSE); 1341 displ += loc; 1342 if (size == WORD) 1343 displ &= 0xFFFF; 1344 db_printsym((db_addr_t)displ, DB_STGY_XTRN, db_printf); 1345 break; 1346 case o1: 1347 db_printf("$1"); 1348 break; 1349 case o3: 1350 db_printf("$3"); 1351 break; 1352 case OS: 1353 get_value_inc(imm, loc, len, FALSE); /* offset */ 1354 get_value_inc(imm2, loc, 2, FALSE); /* segment */ 1355 db_printf("$%#n,%#n", imm2, imm); 1356 break; 1357 } 1358 } 1359 1360 if (altfmt == 0 && (inst == 0xe9 || inst == 0xeb)) { 1361 /* 1362 * GAS pads to longword boundary after unconditional jumps. 1363 */ 1364 loc = (loc + (4-1)) & ~(4-1); 1365 } 1366 db_printf("\n"); 1367 return (loc); 1368} 1369