commands/swifi/db_disasm.c

   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 /*
  28  * Instruction disassembler.
  29  */
  30
  31 #if 0
  32 #include <linux/kernel.h>
  33 #endif
  34 #include "ddb.h"
  35
  36 #include "db_access.h"
  37 #include "db_sym.h"
  38
  39 /*
  40  * Size attributes
  41  */
  42 #define BYTE    0
  43 #define WORD    1
  44 #define LONG    2
  45 #define QUAD    3
  46 #define SNGL    4
  47 #define DBLR    5
  48 #define EXTR    6
  49 #define SDEP    7
  50 #define NONE    8
  51
  52 /*
  53  * Addressing modes
  54  */
  55 #define E       1                       /* general effective address */
  56 #define Eind    2                       /* indirect address (jump, call) */
  57 #define Ew      3                       /* address, word size */
  58 #define Eb      4                       /* address, byte size */
  59 #define R       5                       /* register, in 'reg' field */
  60 #define Rw      6                       /* word register, in 'reg' field */
  61 #define Ri      7                       /* register in instruction */
  62 #define S       8                       /* segment reg, in 'reg' field */
  63 #define Si      9                       /* segment reg, in instruction */
  64 #define A       10                      /* accumulator */
  65 #define BX      11                      /* (bx) */
  66 #define CL      12                      /* cl, for shifts */
  67 #define DX      13                      /* dx, for IO */
  68 #define SI      14                      /* si */
  69 #define DI      15                      /* di */
  70 #define CR      16                      /* control register */
  71 #define DR      17                      /* debug register */
  72 #define TR      18                      /* test register */
  73 #define I       19                      /* immediate, unsigned */
  74 #define Is      20                      /* immediate, signed */
  75 #define Ib      21                      /* byte immediate, unsigned */
  76 #define Ibs     22                      /* byte immediate, signed */
  77 #define Iw      23                      /* word immediate, unsigned */
  78 #define O       25                      /* direct address */
  79 #define Db      26                      /* byte displacement from EIP */
  80 #define Dl      27                      /* long displacement from EIP */
  81 #define o1      28                      /* constant 1 */
  82 #define o3      29                      /* constant 3 */
  83 #define OS      30                      /* immediate offset/segment */
  84 #define ST      31                      /* FP stack top */
  85 #define STI     32                      /* FP stack */
  86 #define X       33                      /* extended FP op */
  87 #define XA      34                      /* for 'fstcw %ax' */
  88 #define El      35                      /* address, long size */
  89 #define Ril     36                      /* long register in instruction */
  90 #define Iba     37                      /* byte immediate, don't print if 0xa */
  91
  92 struct inst {
  93         const char *    i_name;         /* name */
  94         short   i_has_modrm;            /* has regmodrm byte */
  95         short   i_size;                 /* operand size */
  96         int     i_mode;                 /* addressing modes */
  97         const void *    i_extra;        /* pointer to extra opcode table */
  98 };
  99
 100 #define op1(x)          (x)
 101 #define op2(x,y)        ((x)|((y)<<8))
 102 #define op3(x,y,z)      ((x)|((y)<<8)|((z)<<16))
 103
 104 struct finst {
 105         const char *    f_name;         /* name for memory instruction */
 106         int     f_size;                 /* size for memory instruction */
 107         int     f_rrmode;               /* mode for rr instruction */
 108         const void *    f_rrname;       /* name for rr instruction
 109                                            (or pointer to table) */
 110 };
 111
 112 static const char * const db_Grp6[] = {
 113         "sldt",
 114         "str",
 115         "lldt",
 116         "ltr",
 117         "verr",
 118         "verw",
 119         "",
 120         ""
 121 };
 122
 123 static const char * const db_Grp7[] = {
 124         "sgdt",
 125         "sidt",
 126         "lgdt",
 127         "lidt",
 128         "smsw",
 129         "",
 130         "lmsw",
 131         "invlpg"
 132 };
 133
 134 static const char * const db_Grp8[] = {
 135         "",
 136         "",
 137         "",
 138         "",
 139         "bt",
 140         "bts",
 141         "btr",
 142         "btc"
 143 };
 144
 145 static const char * const db_Grp9[] = {
 146         "",
 147         "cmpxchg8b",
 148         "",
 149         "",
 150         "",
 151         "",
 152         "",
 153         ""
 154 };
 155
 156 static const struct inst db_inst_0f0x[] = {
 157 /*00*/  { "",      TRUE,  NONE,  op1(Ew),     db_Grp6 },
 158 /*01*/  { "",      TRUE,  NONE,  op1(Ew),     db_Grp7 },
 159 /*02*/  { "lar",   TRUE,  LONG,  op2(E,R),    0 },
 160 /*03*/  { "lsl",   TRUE,  LONG,  op2(E,R),    0 },
 161 /*04*/  { "",      FALSE, NONE,  0,           0 },
 162 /*05*/  { "",      FALSE, NONE,  0,           0 },
 163 /*06*/  { "clts",  FALSE, NONE,  0,           0 },
 164 /*07*/  { "",      FALSE, NONE,  0,           0 },
 165
 166 /*08*/  { "invd",  FALSE, NONE,  0,           0 },
 167 /*09*/  { "wbinvd",FALSE, NONE,  0,           0 },
 168 /*0a*/  { "",      FALSE, NONE,  0,           0 },
 169 /*0b*/  { "",      FALSE, NONE,  0,           0 },
 170 /*0c*/  { "",      FALSE, NONE,  0,           0 },
 171 /*0d*/  { "",      FALSE, NONE,  0,           0 },
 172 /*0e*/  { "",      FALSE, NONE,  0,           0 },
 173 /*0f*/  { "",      FALSE, NONE,  0,           0 },
 174 };
 175
 176 static const struct inst db_inst_0f2x[] = {
 177 /*20*/  { "mov",   TRUE,  LONG,  op2(CR,El),  0 },
 178 /*21*/  { "mov",   TRUE,  LONG,  op2(DR,El),  0 },
 179 /*22*/  { "mov",   TRUE,  LONG,  op2(El,CR),  0 },
 180 /*23*/  { "mov",   TRUE,  LONG,  op2(El,DR),  0 },
 181 /*24*/  { "mov",   TRUE,  LONG,  op2(TR,El),  0 },
 182 /*25*/  { "",      FALSE, NONE,  0,           0 },
 183 /*26*/  { "mov",   TRUE,  LONG,  op2(El,TR),  0 },
 184 /*27*/  { "",      FALSE, NONE,  0,           0 },
 185
 186 /*28*/  { "",      FALSE, NONE,  0,           0 },
 187 /*29*/  { "",      FALSE, NONE,  0,           0 },
 188 /*2a*/  { "",      FALSE, NONE,  0,           0 },
 189 /*2b*/  { "",      FALSE, NONE,  0,           0 },
 190 /*2c*/  { "",      FALSE, NONE,  0,           0 },
 191 /*2d*/  { "",      FALSE, NONE,  0,           0 },
 192 /*2e*/  { "",      FALSE, NONE,  0,           0 },
 193 /*2f*/  { "",      FALSE, NONE,  0,           0 },
 194 };
 195
 196 static const struct inst db_inst_0f3x[] = {
 197 /*30*/  { "wrmsr", FALSE, NONE,  0,           0 },
 198 /*31*/  { "rdtsc", FALSE, NONE,  0,           0 },
 199 /*32*/  { "rdmsr", FALSE, NONE,  0,           0 },
 200 /*33*/  { "rdpmc", FALSE, NONE,  0,           0 },
 201 /*34*/  { "",      FALSE, NONE,  0,           0 },
 202 /*35*/  { "",      FALSE, NONE,  0,           0 },
 203 /*36*/  { "",      FALSE, NONE,  0,           0 },
 204 /*37*/  { "",      FALSE, NONE,  0,           0 },
 205
 206 /*38*/  { "",      FALSE, NONE,  0,           0 },
 207 /*39*/  { "",      FALSE, NONE,  0,           0 },
 208 /*3a*/  { "",      FALSE, NONE,  0,           0 },
 209 /*3b*/  { "",      FALSE, NONE,  0,           0 },
 210 /*3c*/  { "",      FALSE, NONE,  0,           0 },
 211 /*3d*/  { "",      FALSE, NONE,  0,           0 },
 212 /*3e*/  { "",      FALSE, NONE,  0,           0 },
 213 /*3f*/  { "",      FALSE, NONE,  0,           0 },
 214 };
 215
 216 static const struct inst db_inst_0f8x[] = {
 217 /*80*/  { "jo",    FALSE, NONE,  op1(Dl),     0 },
 218 /*81*/  { "jno",   FALSE, NONE,  op1(Dl),     0 },
 219 /*82*/  { "jb",    FALSE, NONE,  op1(Dl),     0 },
 220 /*83*/  { "jnb",   FALSE, NONE,  op1(Dl),     0 },
 221 /*84*/  { "jz",    FALSE, NONE,  op1(Dl),     0 },
 222 /*85*/  { "jnz",   FALSE, NONE,  op1(Dl),     0 },
 223 /*86*/  { "jbe",   FALSE, NONE,  op1(Dl),     0 },
 224 /*87*/  { "jnbe",  FALSE, NONE,  op1(Dl),     0 },
 225
 226 /*88*/  { "js",    FALSE, NONE,  op1(Dl),     0 },
 227 /*89*/  { "jns",   FALSE, NONE,  op1(Dl),     0 },
 228 /*8a*/  { "jp",    FALSE, NONE,  op1(Dl),     0 },
 229 /*8b*/  { "jnp",   FALSE, NONE,  op1(Dl),     0 },
 230 /*8c*/  { "jl",    FALSE, NONE,  op1(Dl),     0 },
 231 /*8d*/  { "jnl",   FALSE, NONE,  op1(Dl),     0 },
 232 /*8e*/  { "jle",   FALSE, NONE,  op1(Dl),     0 },
 233 /*8f*/  { "jnle",  FALSE, NONE,  op1(Dl),     0 },
 234 };
 235
 236 static const struct inst db_inst_0f9x[] = {
 237 /*90*/  { "seto",  TRUE,  NONE,  op1(Eb),     0 },
 238 /*91*/  { "setno", TRUE,  NONE,  op1(Eb),     0 },
 239 /*92*/  { "setb",  TRUE,  NONE,  op1(Eb),     0 },
 240 /*93*/  { "setnb", TRUE,  NONE,  op1(Eb),     0 },
 241 /*94*/  { "setz",  TRUE,  NONE,  op1(Eb),     0 },
 242 /*95*/  { "setnz", TRUE,  NONE,  op1(Eb),     0 },
 243 /*96*/  { "setbe", TRUE,  NONE,  op1(Eb),     0 },
 244 /*97*/  { "setnbe",TRUE,  NONE,  op1(Eb),     0 },
 245
 246 /*98*/  { "sets",  TRUE,  NONE,  op1(Eb),     0 },
 247 /*99*/  { "setns", TRUE,  NONE,  op1(Eb),     0 },
 248 /*9a*/  { "setp",  TRUE,  NONE,  op1(Eb),     0 },
 249 /*9b*/  { "setnp", TRUE,  NONE,  op1(Eb),     0 },
 250 /*9c*/  { "setl",  TRUE,  NONE,  op1(Eb),     0 },
 251 /*9d*/  { "setnl", TRUE,  NONE,  op1(Eb),     0 },
 252 /*9e*/  { "setle", TRUE,  NONE,  op1(Eb),     0 },
 253 /*9f*/  { "setnle",TRUE,  NONE,  op1(Eb),     0 },
 254 };
 255
 256 static const struct inst db_inst_0fax[] = {
 257 /*a0*/  { "push",  FALSE, NONE,  op1(Si),     0 },
 258 /*a1*/  { "pop",   FALSE, NONE,  op1(Si),     0 },
 259 /*a2*/  { "cpuid", FALSE, NONE,  0,           0 },
 260 /*a3*/  { "bt",    TRUE,  LONG,  op2(R,E),    0 },
 261 /*a4*/  { "shld",  TRUE,  LONG,  op3(Ib,R,E), 0 },
 262 /*a5*/  { "shld",  TRUE,  LONG,  op3(CL,R,E), 0 },
 263 /*a6*/  { "",      FALSE, NONE,  0,           0 },
 264 /*a7*/  { "",      FALSE, NONE,  0,           0 },
 265
 266 /*a8*/  { "push",  FALSE, NONE,  op1(Si),     0 },
 267 /*a9*/  { "pop",   FALSE, NONE,  op1(Si),     0 },
 268 /*aa*/  { "rsm",   FALSE, NONE,  0,           0 },
 269 /*ab*/  { "bts",   TRUE,  LONG,  op2(R,E),    0 },
 270 /*ac*/  { "shrd",  TRUE,  LONG,  op3(Ib,R,E), 0 },
 271 /*ad*/  { "shrd",  TRUE,  LONG,  op3(CL,R,E), 0 },
 272 /*a6*/  { "",      FALSE, NONE,  0,           0 },
 273 /*a7*/  { "imul",  TRUE,  LONG,  op2(E,R),    0 },
 274 };
 275
 276 static const struct inst db_inst_0fbx[] = {
 277 /*b0*/  { "cmpxchg",TRUE, BYTE,  op2(R, E),   0 },
 278 /*b0*/  { "cmpxchg",TRUE, LONG,  op2(R, E),   0 },
 279 /*b2*/  { "lss",   TRUE,  LONG,  op2(E, R),   0 },
 280 /*b3*/  { "btr",   TRUE,  LONG,  op2(R, E),   0 },
 281 /*b4*/  { "lfs",   TRUE,  LONG,  op2(E, R),   0 },
 282 /*b5*/  { "lgs",   TRUE,  LONG,  op2(E, R),   0 },
 283 /*b6*/  { "movzb", TRUE,  LONG,  op2(Eb, R),  0 },
 284 /*b7*/  { "movzw", TRUE,  LONG,  op2(Ew, R),  0 },
 285
 286 /*b8*/  { "",      FALSE, NONE,  0,           0 },
 287 /*b9*/  { "",      FALSE, NONE,  0,           0 },
 288 /*ba*/  { "",      TRUE,  LONG,  op2(Ib, E),  db_Grp8 },
 289 /*bb*/  { "btc",   TRUE,  LONG,  op2(R, E),   0 },
 290 /*bc*/  { "bsf",   TRUE,  LONG,  op2(E, R),   0 },
 291 /*bd*/  { "bsr",   TRUE,  LONG,  op2(E, R),   0 },
 292 /*be*/  { "movsb", TRUE,  LONG,  op2(Eb, R),  0 },
 293 /*bf*/  { "movsw", TRUE,  LONG,  op2(Ew, R),  0 },
 294 };
 295
 296 static const struct inst db_inst_0fcx[] = {
 297 /*c0*/  { "xadd",  TRUE,  BYTE,  op2(R, E),   0 },
 298 /*c1*/  { "xadd",  TRUE,  LONG,  op2(R, E),   0 },
 299 /*c2*/  { "",      FALSE, NONE,  0,           0 },
 300 /*c3*/  { "",      FALSE, NONE,  0,           0 },
 301 /*c4*/  { "",      FALSE, NONE,  0,           0 },
 302 /*c5*/  { "",      FALSE, NONE,  0,           0 },
 303 /*c6*/  { "",      FALSE, NONE,  0,           0 },
 304 /*c7*/  { "",      TRUE,  NONE,  op1(E),      db_Grp9 },
 305 /*c8*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 306 /*c9*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 307 /*ca*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 308 /*cb*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 309 /*cc*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 310 /*cd*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 311 /*ce*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 312 /*cf*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
 313 };
 314
 315 static const struct inst * const db_inst_0f[] = {
 316         db_inst_0f0x,
 317         0,
 318         db_inst_0f2x,
 319         db_inst_0f3x,
 320         0,
 321         0,
 322         0,
 323         0,
 324         db_inst_0f8x,
 325         db_inst_0f9x,
 326         db_inst_0fax,
 327         db_inst_0fbx,
 328         db_inst_0fcx,
 329         0,
 330         0,
 331         0
 332 };
 333
 334 static const char * const db_Esc92[] = {
 335         "fnop", "",     "",     "",     "",     "",     "",     ""
 336 };
 337 static const char * const db_Esc94[] = {
 338         "fchs", "fabs", "",     "",     "ftst", "fxam", "",     ""
 339 };
 340 static const char * const db_Esc95[] = {
 341         "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
 342 };
 343 static const char * const db_Esc96[] = {
 344         "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
 345         "fincstp"
 346 };
 347 static const char * const db_Esc97[] = {
 348         "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
 349 };
 350
 351 static const char * const db_Esca5[] = {
 352         "",     "fucompp","",   "",     "",     "",     "",     ""
 353 };
 354
 355 static const char * const db_Escb4[] = {
 356         "fneni","fndisi",       "fnclex","fninit","fsetpm",     "",     "",     ""
 357 };
 358
 359 static const char * const db_Esce3[] = {
 360         "",     "fcompp","",    "",     "",     "",     "",     ""
 361 };
 362
 363 static const char * const db_Escf4[] = {
 364         "fnstsw","",    "",     "",     "",     "",     "",     ""
 365 };
 366
 367 static const struct 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
 378 static const struct 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,  0,           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
 389 static const struct 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,  0,           0 },
 395 /*5*/   { "fisubr", LONG,  op1(X),      db_Esca5 },
 396 /*6*/   { "fidiv",  LONG,  0,           0 },
 397 /*7*/   { "fidivr", LONG,  0,           0 }
 398 };
 399
 400 static const struct 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
 411 static const struct 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
 422 static const struct 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
 433 static const struct 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
 444 static const struct finst db_Escf[] = {
 445 /*0*/   { "fild",   WORD,  0,           0 },
 446 /*1*/   { "",       NONE,  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
 455 static const struct finst * const db_Esc_inst[] = {
 456         db_Esc8, db_Esc9, db_Esca, db_Escb,
 457         db_Escc, db_Escd, db_Esce, db_Escf
 458 };
 459
 460 static const char * const db_Grp1[] = {
 461         "add",
 462         "or",
 463         "adc",
 464         "sbb",
 465         "and",
 466         "sub",
 467         "xor",
 468         "cmp"
 469 };
 470
 471 static const char * const db_Grp2[] = {
 472         "rol",
 473         "ror",
 474         "rcl",
 475         "rcr",
 476         "shl",
 477         "shr",
 478         "shl",
 479         "sar"
 480 };
 481
 482 static const struct 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
 493 static const struct 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
 504 static const struct inst db_Grp5[] = {
 505         { "inc",   TRUE, LONG, op1(E),   0 },
 506         { "dec",   TRUE, LONG, op1(E),   0 },
 507         { "call",  TRUE, LONG, op1(Eind),0 },
 508         { "lcall", TRUE, LONG, op1(Eind),0 },
 509         { "jmp",   TRUE, LONG, op1(Eind),0 },
 510         { "ljmp",  TRUE, LONG, op1(Eind),0 },
 511         { "push",  TRUE, LONG, op1(E),   0 },
 512         { "",      TRUE, NONE, 0,        0 }
 513 };
 514
 515 static const struct 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*/  { "daa",   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*/  { "aaa",   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
 629 /*64*/  { "",      FALSE, NONE,  0,          0 },
 630 /*65*/  { "",      FALSE, NONE,  0,          0 },
 631 /*66*/  { "",      FALSE, NONE,  0,          0 },
 632 /*67*/  { "",      FALSE, NONE,  0,          0 },
 633
 634 /*68*/  { "push",  FALSE, LONG,  op1(I),     0 },
 635 /*69*/  { "imul",  TRUE,  LONG,  op3(I,E,R), 0 },
 636 /*6a*/  { "push",  FALSE, LONG,  op1(Ibs),   0 },
 637 /*6b*/  { "imul",  TRUE,  LONG,  op3(Ibs,E,R),0 },
 638 /*6c*/  { "ins",   FALSE, BYTE,  op2(DX, DI), 0 },
 639 /*6d*/  { "ins",   FALSE, LONG,  op2(DX, DI), 0 },
 640 /*6e*/  { "outs",  FALSE, BYTE,  op2(SI, DX), 0 },
 641 /*6f*/  { "outs",  FALSE, LONG,  op2(SI, DX), 0 },
 642
 643 /*70*/  { "jo",    FALSE, NONE,  op1(Db),     0 },
 644 /*71*/  { "jno",   FALSE, NONE,  op1(Db),     0 },
 645 /*72*/  { "jb",    FALSE, NONE,  op1(Db),     0 },
 646 /*73*/  { "jnb",   FALSE, NONE,  op1(Db),     0 },
 647 /*74*/  { "jz",    FALSE, NONE,  op1(Db),     0 },
 648 /*75*/  { "jnz",   FALSE, NONE,  op1(Db),     0 },
 649 /*76*/  { "jbe",   FALSE, NONE,  op1(Db),     0 },
 650 /*77*/  { "jnbe",  FALSE, NONE,  op1(Db),     0 },
 651
 652 /*78*/  { "js",    FALSE, NONE,  op1(Db),     0 },
 653 /*79*/  { "jns",   FALSE, NONE,  op1(Db),     0 },
 654 /*7a*/  { "jp",    FALSE, NONE,  op1(Db),     0 },
 655 /*7b*/  { "jnp",   FALSE, NONE,  op1(Db),     0 },
 656 /*7c*/  { "jl",    FALSE, NONE,  op1(Db),     0 },
 657 /*7d*/  { "jnl",   FALSE, NONE,  op1(Db),     0 },
 658 /*7e*/  { "jle",   FALSE, NONE,  op1(Db),     0 },
 659 /*7f*/  { "jnle",  FALSE, NONE,  op1(Db),     0 },
 660
 661 /*80*/  { "",      TRUE,  BYTE,  op2(I, E),   db_Grp1 },
 662 /*81*/  { "",      TRUE,  LONG,  op2(I, E),   db_Grp1 },
 663 /*82*/  { "",      TRUE,  BYTE,  op2(I, E),   db_Grp1 },
 664 /*83*/  { "",      TRUE,  LONG,  op2(Ibs,E),  db_Grp1 },
 665 /*84*/  { "test",  TRUE,  BYTE,  op2(R, E),   0 },
 666 /*85*/  { "test",  TRUE,  LONG,  op2(R, E),   0 },
 667 /*86*/  { "xchg",  TRUE,  BYTE,  op2(R, E),   0 },
 668 /*87*/  { "xchg",  TRUE,  LONG,  op2(R, E),   0 },
 669
 670 /*88*/  { "mov",   TRUE,  BYTE,  op2(R, E),   0 },
 671 /*89*/  { "mov",   TRUE,  LONG,  op2(R, E),   0 },
 672 /*8a*/  { "mov",   TRUE,  BYTE,  op2(E, R),   0 },
 673 /*8b*/  { "mov",   TRUE,  LONG,  op2(E, R),   0 },
 674 /*8c*/  { "mov",   TRUE,  NONE,  op2(S, Ew),  0 },
 675 /*8d*/  { "lea",   TRUE,  LONG,  op2(E, R),   0 },
 676 /*8e*/  { "mov",   TRUE,  NONE,  op2(Ew, S),  0 },
 677 /*8f*/  { "pop",   TRUE,  LONG,  op1(E),      0 },
 678
 679 /*90*/  { "nop",   FALSE, NONE,  0,           0 },
 680 /*91*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 681 /*92*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 682 /*93*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 683 /*94*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 684 /*95*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 685 /*96*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 686 /*97*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
 687
 688 /*98*/  { "cbw",   FALSE, SDEP,  0,           "cwde" }, /* cbw/cwde */
 689 /*99*/  { "cwd",   FALSE, SDEP,  0,           "cdq"  }, /* cwd/cdq */
 690 /*9a*/  { "lcall", FALSE, NONE,  op1(OS),     0 },
 691 /*9b*/  { "wait",  FALSE, NONE,  0,           0 },
 692 /*9c*/  { "pushf", FALSE, LONG,  0,           0 },
 693 /*9d*/  { "popf",  FALSE, LONG,  0,           0 },
 694 /*9e*/  { "sahf",  FALSE, NONE,  0,           0 },
 695 /*9f*/  { "lahf",  FALSE, NONE,  0,           0 },
 696
 697 /*a0*/  { "mov",   FALSE, BYTE,  op2(O, A),   0 },
 698 /*a1*/  { "mov",   FALSE, LONG,  op2(O, A),   0 },
 699 /*a2*/  { "mov",   FALSE, BYTE,  op2(A, O),   0 },
 700 /*a3*/  { "mov",   FALSE, LONG,  op2(A, O),   0 },
 701 /*a4*/  { "movs",  FALSE, BYTE,  op2(SI,DI),  0 },
 702 /*a5*/  { "movs",  FALSE, LONG,  op2(SI,DI),  0 },
 703 /*a6*/  { "cmps",  FALSE, BYTE,  op2(SI,DI),  0 },
 704 /*a7*/  { "cmps",  FALSE, LONG,  op2(SI,DI),  0 },
 705
 706 /*a8*/  { "test",  FALSE, BYTE,  op2(I, A),   0 },
 707 /*a9*/  { "test",  FALSE, LONG,  op2(I, A),   0 },
 708 /*aa*/  { "stos",  FALSE, BYTE,  op1(DI),     0 },
 709 /*ab*/  { "stos",  FALSE, LONG,  op1(DI),     0 },
 710 /*ac*/  { "lods",  FALSE, BYTE,  op1(SI),     0 },
 711 /*ad*/  { "lods",  FALSE, LONG,  op1(SI),     0 },
 712 /*ae*/  { "scas",  FALSE, BYTE,  op1(SI),     0 },
 713 /*af*/  { "scas",  FALSE, LONG,  op1(SI),     0 },
 714
 715 /*b0*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 716 /*b1*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 717 /*b2*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 718 /*b3*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 719 /*b4*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 720 /*b5*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 721 /*b6*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 722 /*b7*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
 723
 724 /*b8*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 725 /*b9*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 726 /*ba*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 727 /*bb*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 728 /*bc*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 729 /*bd*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 730 /*be*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 731 /*bf*/  { "mov",   FALSE, LONG,  op2(I, Ri),  0 },
 732
 733 /*c0*/  { "",      TRUE,  BYTE,  op2(Ib, E),  db_Grp2 },
 734 /*c1*/  { "",      TRUE,  LONG,  op2(Ib, E),  db_Grp2 },
 735 /*c2*/  { "ret",   FALSE, NONE,  op1(Iw),     0 },
 736 /*c3*/  { "ret",   FALSE, NONE,  0,           0 },
 737 /*c4*/  { "les",   TRUE,  LONG,  op2(E, R),   0 },
 738 /*c5*/  { "lds",   TRUE,  LONG,  op2(E, R),   0 },
 739 /*c6*/  { "mov",   TRUE,  BYTE,  op2(I, E),   0 },
 740 /*c7*/  { "mov",   TRUE,  LONG,  op2(I, E),   0 },
 741
 742 /*c8*/  { "enter", FALSE, NONE,  op2(Iw, Ib), 0 },
 743 /*c9*/  { "leave", FALSE, NONE,  0,           0 },
 744 /*ca*/  { "lret",  FALSE, NONE,  op1(Iw),     0 },
 745 /*cb*/  { "lret",  FALSE, NONE,  0,           0 },
 746 /*cc*/  { "int",   FALSE, NONE,  op1(o3),     0 },
 747 /*cd*/  { "int",   FALSE, NONE,  op1(Ib),     0 },
 748 /*ce*/  { "into",  FALSE, NONE,  0,           0 },
 749 /*cf*/  { "iret",  FALSE, NONE,  0,           0 },
 750
 751 /*d0*/  { "",      TRUE,  BYTE,  op2(o1, E),  db_Grp2 },
 752 /*d1*/  { "",      TRUE,  LONG,  op2(o1, E),  db_Grp2 },
 753 /*d2*/  { "",      TRUE,  BYTE,  op2(CL, E),  db_Grp2 },
 754 /*d3*/  { "",      TRUE,  LONG,  op2(CL, E),  db_Grp2 },
 755 /*d4*/  { "aam",   FALSE, NONE,  op1(Iba),    0 },
 756 /*d5*/  { "aad",   FALSE, NONE,  op1(Iba),    0 },
 757 /*d6*/  { ".byte\t0xd6", FALSE, NONE, 0,      0 },
 758 /*d7*/  { "xlat",  FALSE, BYTE,  op1(BX),     0 },
 759
 760 /*d8*/  { "",      TRUE,  NONE,  0,           db_Esc8 },
 761 /*d9*/  { "",      TRUE,  NONE,  0,           db_Esc9 },
 762 /*da*/  { "",      TRUE,  NONE,  0,           db_Esca },
 763 /*db*/  { "",      TRUE,  NONE,  0,           db_Escb },
 764 /*dc*/  { "",      TRUE,  NONE,  0,           db_Escc },
 765 /*dd*/  { "",      TRUE,  NONE,  0,           db_Escd },
 766 /*de*/  { "",      TRUE,  NONE,  0,           db_Esce },
 767 /*df*/  { "",      TRUE,  NONE,  0,           db_Escf },
 768
 769 /*e0*/  { "loopne",FALSE, NONE,  op1(Db),     0 },
 770 /*e1*/  { "loope", FALSE, NONE,  op1(Db),     0 },
 771 /*e2*/  { "loop",  FALSE, NONE,  op1(Db),     0 },
 772 /*e3*/  { "jcxz",  FALSE, SDEP,  op1(Db),     "jecxz" },
 773 /*e4*/  { "in",    FALSE, BYTE,  op2(Ib, A),  0 },
 774 /*e5*/  { "in",    FALSE, LONG,  op2(Ib, A) , 0 },
 775 /*e6*/  { "out",   FALSE, BYTE,  op2(A, Ib),  0 },
 776 /*e7*/  { "out",   FALSE, LONG,  op2(A, Ib) , 0 },
 777
 778 /*e8*/  { "call",  FALSE, NONE,  op1(Dl),     0 },
 779 /*e9*/  { "jmp",   FALSE, NONE,  op1(Dl),     0 },
 780 /*ea*/  { "ljmp",  FALSE, NONE,  op1(OS),     0 },
 781 /*eb*/  { "jmp",   FALSE, NONE,  op1(Db),     0 },
 782 /*ec*/  { "in",    FALSE, BYTE,  op2(DX, A),  0 },
 783 /*ed*/  { "in",    FALSE, LONG,  op2(DX, A) , 0 },
 784 /*ee*/  { "out",   FALSE, BYTE,  op2(A, DX),  0 },
 785 /*ef*/  { "out",   FALSE, LONG,  op2(A, DX) , 0 },
 786
 787 /*f0*/  { "",      FALSE, NONE,  0,          0 },
 788 /*f1*/  { ".byte\t0xf1", FALSE, NONE, 0,     0 },
 789 /*f2*/  { "",      FALSE, NONE,  0,          0 },
 790 /*f3*/  { "",      FALSE, NONE,  0,          0 },
 791 /*f4*/  { "hlt",   FALSE, NONE,  0,          0 },
 792 /*f5*/  { "cmc",   FALSE, NONE,  0,          0 },
 793 /*f6*/  { "",      TRUE,  BYTE,  0,          db_Grp3 },
 794 /*f7*/  { "",      TRUE,  LONG,  0,          db_Grp3 },
 795
 796 /*f8*/  { "clc",   FALSE, NONE,  0,          0 },
 797 /*f9*/  { "stc",   FALSE, NONE,  0,          0 },
 798 /*fa*/  { "cli",   FALSE, NONE,  0,          0 },
 799 /*fb*/  { "sti",   FALSE, NONE,  0,          0 },
 800 /*fc*/  { "cld",   FALSE, NONE,  0,          0 },
 801 /*fd*/  { "std",   FALSE, NONE,  0,          0 },
 802 /*fe*/  { "",      TRUE,  NONE,  0,          db_Grp4 },
 803 /*ff*/  { "",      TRUE,  NONE,  0,          db_Grp5 },
 804 };
 805
 806 static const struct inst db_bad_inst =
 807         { "???",   FALSE, NONE,  0,           0 }
 808 ;
 809
 810 #define f_mod(byte)     ((byte)>>6)
 811 #define f_reg(byte)     (((byte)>>3)&0x7)
 812 #define f_rm(byte)      ((byte)&0x7)
 813
 814 #define sib_ss(byte)    ((byte)>>6)
 815 #define sib_index(byte) (((byte)>>3)&0x7)
 816 #define sib_base(byte)  ((byte)&0x7)
 817
 818 struct i_addr {
 819         int             is_reg; /* if reg, reg number is in 'disp' */
 820         int             disp;
 821         const char *    base;
 822         const char *    index;
 823         int             ss;
 824 };
 825
 826 static const char * const db_index_reg_16[8] = {
 827         "%bx,%si",
 828         "%bx,%di",
 829         "%bp,%si",
 830         "%bp,%di",
 831         "%si",
 832         "%di",
 833         "%bp",
 834         "%bx"
 835 };
 836
 837 static const char * const db_reg[3][8] = {
 838   {"%al",  "%cl",  "%dl",  "%bl",  "%ah",  "%ch",  "%dh",  "%bh"},
 839   {"%ax",  "%cx",  "%dx",  "%bx",  "%sp",  "%bp",  "%si",  "%di"},
 840   {"%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi"}
 841 };
 842
 843 static const char * const db_seg_reg[8] = {
 844         "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
 845 };
 846
 847 /*
 848  * lengths for size attributes
 849  */
 850 static const int db_lengths[] = {
 851         1,      /* BYTE */
 852         2,      /* WORD */
 853         4,      /* LONG */
 854         8,      /* QUAD */
 855         4,      /* SNGL */
 856         8,      /* DBLR */
 857         10,     /* EXTR */
 858 };
 859
 860 #define get_value_inc(result, loc, size, is_signed) \
 861         result = db_get_value((loc), (size), (is_signed)); \
 862         (loc) += (size);
 863
 864 /*static db_addr_t
 865 //              db_disasm_esc __P((db_addr_t loc, int inst, int short_addr,
 866 //                                 int size, const char *seg));
 867 //static void   db_print_address __P((const char *seg, int size,
 868 //                                    struct i_addr *addrp));
 869 */
 870 static db_addr_t
 871                 db_read_address __P((db_addr_t loc, int short_addr,
 872                                      int regmodrm, struct i_addr *addrp));
 873
 874 /*
 875  * Read address at location and return updated location.
 876  */
 877 static db_addr_t
 878 db_read_address(loc, short_addr, regmodrm, addrp)
 879         db_addr_t       loc;
 880         int             short_addr;
 881         int             regmodrm;
 882         struct i_addr * addrp;          /* out */
 883 {
 884         int             mod, rm, sib, index, disp;
 885
 886         mod = f_mod(regmodrm);
 887         rm  = f_rm(regmodrm);
 888
 889         if (mod == 3) {
 890             addrp->is_reg = TRUE;
 891             addrp->disp = rm;
 892             return (loc);
 893         }
 894         addrp->is_reg = FALSE;
 895         addrp->index = 0;
 896
 897         if (short_addr) {
 898             addrp->index = 0;
 899             addrp->ss = 0;
 900             switch (mod) {
 901                 case 0:
 902                     if (rm == 6) {
 903                         get_value_inc(disp, loc, 2, FALSE);
 904                         addrp->disp = disp;
 905                         addrp->base = 0;
 906                     }
 907                     else {
 908                         addrp->disp = 0;
 909                         addrp->base = db_index_reg_16[rm];
 910                     }
 911                     break;
 912                 case 1:
 913                     get_value_inc(disp, loc, 1, TRUE);
 914                     disp &= 0xFFFF;
 915                     addrp->disp = disp;
 916                     addrp->base = db_index_reg_16[rm];
 917                     break;
 918                 case 2:
 919                     get_value_inc(disp, loc, 2, FALSE);
 920                     addrp->disp = disp;
 921                     addrp->base = db_index_reg_16[rm];
 922                     break;
 923             }
 924         }
 925         else {
 926             if (mod != 3 && rm == 4) {
 927                 get_value_inc(sib, loc, 1, FALSE);
 928                 rm = sib_base(sib);
 929                 index = sib_index(sib);
 930                 if (index != 4)
 931                     addrp->index = db_reg[LONG][index];
 932                 addrp->ss = sib_ss(sib);
 933             }
 934
 935             switch (mod) {
 936                 case 0:
 937                     if (rm == 5) {
 938                         get_value_inc(addrp->disp, loc, 4, FALSE);
 939                         addrp->base = 0;
 940                     }
 941                     else {
 942                         addrp->disp = 0;
 943                         addrp->base = db_reg[LONG][rm];
 944                     }
 945                     break;
 946
 947                 case 1:
 948                     get_value_inc(disp, loc, 1, TRUE);
 949                     addrp->disp = disp;
 950                     addrp->base = db_reg[LONG][rm];
 951                     break;
 952
 953                 case 2:
 954                     get_value_inc(disp, loc, 4, FALSE);
 955                     addrp->disp = disp;
 956                     addrp->base = db_reg[LONG][rm];
 957                     break;
 958             }
 959         }
 960         return (loc);
 961 }
 962
 963 /*
 964  * NWT: fault injection routine only. disasm floating-point instruction
 965  * and return updated location.
 966  */
 967 static db_addr_t
 968 my_disasm_esc(
 969               db_addr_t loc,
 970               int               inst,
 971               int               short_addr,
 972               int               size,
 973               const char *      seg)
 974 {
 975         int             regmodrm;
 976         const struct finst *    fp;
 977         int             mod;
 978         struct i_addr   address;
 979         const char *    name;
 980
 981         get_value_inc(regmodrm, loc, 1, FALSE);
 982         fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
 983         mod = f_mod(regmodrm);
 984         if (mod != 3) {
 985             if (*fp->f_name == '\0') {
 986                 return (loc);
 987             }
 988             /*
 989              * Normal address modes.
 990              */
 991             loc = db_read_address(loc, short_addr, regmodrm, &address);
 992             switch(fp->f_size) {
 993                 case SNGL:
 994                     break;
 995                 case DBLR:
 996                     break;
 997                 case EXTR:
 998                     break;
 999                 case WORD:
1000                     break;
1001                 case LONG:
1002                     break;
1003                 case QUAD:
1004                     break;
1005                 default:
1006                     break;
1007             }
1008         }
1009         else {
1010             /*
1011              * 'reg-reg' - special formats
1012              */
1013             switch (fp->f_rrmode) {
1014                 case op2(ST,STI):
1015                     name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1016                     break;
1017                 case op2(STI,ST):
1018                     name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1019                     break;
1020                 case op1(STI):
1021                     name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1022                     break;
1023                 case op1(X):
1024                     name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1025                     if (*name == '\0')
1026                         goto bad;
1027                     break;
1028                 case op1(XA):
1029                     name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1030                     if (*name == '\0')
1031                         goto bad;
1032                     break;
1033                 default:
1034                 bad:
1035                     break;
1036             }
1037         }
1038
1039         return (loc);
1040 }
1041 /*
1042  * Disassemble instruction at 'loc'.  'altfmt' specifies an
1043  * (optional) alternate format.  Return address of start of
1044  * next instruction.
1045  */
1046 db_addr_t
1047 my_disasm(db_addr_t     loc,
1048           boolean_t     altfmt)
1049 {
1050         int     inst;
1051         int     size;
1052         int     short_addr;
1053         const char *    seg;
1054         const struct inst *     ip;
1055         const char *    i_name;
1056         int     i_size;
1057         int     i_mode;
1058         int     regmodrm = 0;
1059         boolean_t       first;
1060         int     displ;
1061         int     prefix;
1062         int     imm;
1063         int     imm2;
1064         int     len;
1065         struct i_addr   address;
1066
1067         get_value_inc(inst, loc, 1, FALSE);
1068         short_addr = FALSE;
1069         size = LONG;
1070         seg = 0;
1071
1072         /*
1073          * Get prefixes
1074          */
1075         prefix = TRUE;
1076         do {
1077             switch (inst) {
1078                 case 0x66:              /* data16 */
1079                     size = WORD;
1080                     break;
1081                 case 0x67:
1082                     short_addr = TRUE;
1083                     break;
1084                 case 0x26:
1085                     seg = "%es";
1086                     break;
1087                 case 0x36:
1088                     seg = "%ss";
1089                     break;
1090                 case 0x2e:
1091                     seg = "%cs";
1092                     break;
1093                 case 0x3e:
1094                     seg = "%ds";
1095                     break;
1096                 case 0x64:
1097                     seg = "%fs";
1098                     break;
1099                 case 0x65:
1100                     seg = "%gs";
1101                     break;
1102                 case 0xf0:
1103 #if 0
1104                     // db_printf("lock ");
1105 #endif
1106                     break;
1107                 case 0xf2:
1108 #if 0
1109                     // db_printf("repne ");
1110 #endif
1111                     break;
1112                 case 0xf3:
1113 #if 0
1114                     // db_printf("repe ");      /* XXX repe VS rep */
1115 #endif
1116                     break;
1117                 default:
1118                     prefix = FALSE;
1119                     break;
1120             }
1121             if (prefix) {
1122                 get_value_inc(inst, loc, 1, FALSE);
1123             }
1124         } while (prefix);
1125
1126         if (inst >= 0xd8 && inst <= 0xdf) {
1127             loc = my_disasm_esc(loc, inst, short_addr, size, seg);
1128             return (loc);
1129         }
1130
1131         if (inst == 0x0f) {
1132             get_value_inc(inst, loc, 1, FALSE);
1133             ip = db_inst_0f[inst>>4];
1134             if (ip == 0) {
1135                 ip = &db_bad_inst;
1136             }
1137             else {
1138                 ip = &ip[inst&0xf];
1139             }
1140         }
1141         else
1142             ip = &db_inst_table[inst];
1143
1144         if (ip->i_has_modrm) {
1145             unsigned long prev_loc=loc;
1146             extern unsigned long modAddr;
1147
1148             get_value_inc(regmodrm, loc, 1, FALSE);
1149             loc = db_read_address(loc, short_addr, regmodrm, &address);
1150                 modAddr=prev_loc;
1151 #if 0
1152 //          printf("modrm at %x, offset %d\n", loc, loc-prev_loc);
1153 #endif
1154         }
1155
1156         i_name = ip->i_name;
1157         i_size = ip->i_size;
1158         i_mode = ip->i_mode;
1159
1160         if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1161             ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1162             ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) {
1163             i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1164         }
1165         else if (ip->i_extra == db_Grp3) {
1166             ip = ip->i_extra;
1167             ip = &ip[f_reg(regmodrm)];
1168             i_name = ip->i_name;
1169             i_mode = ip->i_mode;
1170         }
1171         else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1172             ip = ip->i_extra;
1173             ip = &ip[f_reg(regmodrm)];
1174             i_name = ip->i_name;
1175             i_mode = ip->i_mode;
1176             i_size = ip->i_size;
1177         }
1178
1179         if (i_size == SDEP) {
1180         }
1181         else {
1182             if (i_size != NONE) {
1183                 if (i_size == BYTE) {
1184                     size = BYTE;
1185                 }
1186                 else if (i_size == WORD) {
1187                     size = WORD;
1188                 }
1189             }
1190         }
1191         for (first = TRUE;
1192              i_mode != 0;
1193              i_mode >>= 8, first = FALSE)
1194         {
1195
1196             switch (i_mode & 0xFF) {
1197
1198                 case E:
1199 #if 0
1200                     // db_print_address(seg, size, &address);
1201 #endif
1202                     break;
1203
1204                 case Eind:
1205 #if 0
1206                     // db_print_address(seg, size, &address);
1207 #endif
1208                     break;
1209
1210                 case El:
1211 #if 0
1212                     // db_print_address(seg, LONG, &address);
1213 #endif
1214                     break;
1215
1216                 case Ew:
1217 #if 0
1218                     // db_print_address(seg, WORD, &address);
1219 #endif
1220                     break;
1221
1222                 case Eb:
1223 #if 0
1224                     // db_print_address(seg, BYTE, &address);
1225 #endif
1226                     break;
1227
1228                 case R:
1229 #if 0
1230                     // db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1231 #endif
1232                     break;
1233
1234                 case Rw:
1235 #if 0
1236                     // db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1237 #endif
1238                     break;
1239
1240                 case Ri:
1241 #if 0
1242                     // db_printf("%s", db_reg[size][f_rm(inst)]);
1243 #endif
1244                     break;
1245
1246                 case Ril:
1247 #if 0
1248                     // db_printf("%s", db_reg[LONG][f_rm(inst)]);
1249 #endif
1250                     break;
1251
1252                 case S:
1253 #if 0
1254                     // db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1255 #endif
1256                     break;
1257
1258                 case Si:
1259 #if 0
1260                     // db_printf("%s", db_seg_reg[f_reg(inst)]);
1261 #endif
1262                     break;
1263
1264                 case A:
1265 #if 0
1266                     // db_printf("%s", db_reg[size][0]);        /* acc */
1267 #endif
1268                     break;
1269
1270                 case BX:
1271                     break;
1272
1273                 case CL:
1274                     break;
1275
1276                 case DX:
1277                     break;
1278
1279                 case SI:
1280                     break;
1281
1282                 case DI:
1283                     break;
1284
1285                 case CR:
1286                     break;
1287
1288                 case DR:
1289                     break;
1290
1291                 case TR:
1292                     break;
1293
1294                 case I:
1295                     len = db_lengths[size];
1296                     get_value_inc(imm, loc, len, FALSE);
1297                     break;
1298
1299                 case Is:
1300                     len = db_lengths[size];
1301                     get_value_inc(imm, loc, len, FALSE);
1302                     /*
1303                      * XXX the + in this format doesn't seem to work right.
1304                      * `Is' is equivalent to `I'.
1305                      */
1306                     break;
1307
1308                 case Ib:
1309                     get_value_inc(imm, loc, 1, FALSE);
1310                     break;
1311
1312                 case Iba:
1313                     get_value_inc(imm, loc, 1, FALSE);
1314                     break;
1315
1316                 case Ibs:
1317                     get_value_inc(imm, loc, 1, TRUE);
1318                     if (size == WORD)
1319                         imm &= 0xFFFF;
1320                     break;
1321
1322                 case Iw:
1323                     get_value_inc(imm, loc, 2, FALSE);
1324                     break;
1325
1326                 case O:
1327                     len = (short_addr ? 2 : 4);
1328                     get_value_inc(displ, loc, len, FALSE);
1329                     if (seg) ;
1330                     else
1331 #if 0
1332 //                      db_printsym((db_addr_t)displ, DB_STGY_ANY);
1333 #endif
1334                     break;
1335
1336                 case Db:
1337                     get_value_inc(displ, loc, 1, TRUE);
1338                     displ += loc;
1339                     if (size == WORD)
1340                         displ &= 0xFFFF;
1341 #if 0
1342 //                  db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1343 #endif
1344                     break;
1345
1346                 case Dl:
1347                     len = db_lengths[size];
1348                     get_value_inc(displ, loc, len, FALSE);
1349                     displ += loc;
1350                     if (size == WORD)
1351                         displ &= 0xFFFF;
1352 #if 0
1353 //                  db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1354 #endif
1355                     break;
1356
1357                 case o1:
1358                     break;
1359
1360                 case o3:
1361                     break;
1362
1363                 case OS:
1364                     len = db_lengths[size];
1365                     get_value_inc(imm, loc, len, FALSE);        /* offset */
1366                     get_value_inc(imm2, loc, 2, FALSE); /* segment */
1367                     break;
1368             }
1369         }
1370 #if 0
1371 //      db_printf("\n");
1372 #endif
1373         return (loc);
1374 }