1 /* $NetBSD: db_disasm.c,v 1.49 2021/05/23 11:56:28 riastradh Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 * 28 * Id: db_disasm.c,v 2.3 91/02/05 17:11:03 mrt (CMU) 29 */ 30 31 /* 32 * Instruction disassembler. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: db_disasm.c,v 1.49 2021/05/23 11:56:28 riastradh Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <machine/db_machdep.h> 41 42 #include <ddb/db_access.h> 43 #include <ddb/db_sym.h> 44 #include <ddb/db_output.h> 45 #include <ddb/db_interface.h> 46 47 /* 48 * Size attributes 49 */ 50 #define BYTE 0 51 #define WORD 1 52 #define LONG 2 53 #define QUAD 3 54 #define SNGL 4 55 #define DBLR 5 56 #define EXTR 6 57 #define SDEP 7 58 #define NONE 8 59 #define RDEP 9 60 61 /* 62 * Addressing modes 63 */ 64 #define E 1 /* general effective address */ 65 #define Eind 2 /* indirect address (jump, call) */ 66 #define Ew 3 /* address, word size */ 67 #define Eb 4 /* address, byte size */ 68 #define R 5 /* register, in 'reg' field */ 69 #define Rw 6 /* word register, in 'reg' field */ 70 #define Ri 7 /* register in instruction */ 71 #define S 8 /* segment reg, in 'reg' field */ 72 #define Si 9 /* segment reg, in instruction */ 73 #define A 10 /* accumulator */ 74 #define BX 11 /* (bx) */ 75 #define CL 12 /* cl, for shifts */ 76 #define DX 13 /* dx, for IO */ 77 #define SI 14 /* si */ 78 #define DI 15 /* di */ 79 #define CR 16 /* control register */ 80 #define DR 17 /* debug register */ 81 #define TR 18 /* test register */ 82 #define I 19 /* immediate, unsigned */ 83 #define Is 20 /* immediate, signed */ 84 #define Ib 21 /* byte immediate, unsigned */ 85 #define Ibs 22 /* byte immediate, signed */ 86 #define Iw 23 /* word immediate, unsigned */ 87 #define Il 24 /* long immediate */ 88 #define O 25 /* direct address */ 89 #define Db 26 /* byte displacement from EIP */ 90 #define Dl 27 /* long displacement from EIP */ 91 #define o1 28 /* constant 1 */ 92 #define o3 29 /* constant 3 */ 93 #define OS 30 /* immediate offset/segment */ 94 #define ST 31 /* FP stack top */ 95 #define STI 32 /* FP stack */ 96 #define X 33 /* extended FP op */ 97 #define XA 34 /* for 'fstcw %ax' */ 98 #define El 35 /* address, long size */ 99 #define Ril 36 /* long register in instruction */ 100 #define Iba 37 /* byte immediate, don't print if 0xa */ 101 #define MEx 38 /* memory, or an extension op */ 102 103 struct inst { 104 const char *i_name; /* name */ 105 short i_has_modrm; /* has regmodrm byte */ 106 short i_size; /* operand size */ 107 int i_mode; /* addressing modes */ 108 const void *i_extra; /* pointer to extra opcode table */ 109 }; 110 111 #define op1(x) (x) 112 #define op2(x,y) ((x)|((y)<<8)) 113 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) 114 115 struct finst { 116 const char *f_name; /* name for memory instruction */ 117 int f_size; /* size for memory instruction */ 118 int f_rrmode; /* mode for rr instruction */ 119 const void *f_rrname; /* name for rr instruction 120 (or pointer to table) */ 121 }; 122 123 const char * const db_Grp6[] = { 124 "sldt", 125 "str", 126 "lldt", 127 "ltr", 128 "verr", 129 "verw", 130 "", 131 "" 132 }; 133 134 struct inst db_Grp7[] = { 135 { "sgdt", false, NONE, op1(E), 0 }, 136 { "sidt", false, NONE, op2(MEx,4), "monitor\0mwait\0clac\0stac"}, 137 { "lgdt", false, NONE, op2(MEx,2), "xgetbv\0xsetbv" }, 138 { "lidt", false, NONE, op1(E), 0 }, 139 { "smsw", false, NONE, op1(E), 0 }, 140 { "", false, NONE, 0, 0 }, 141 { "lmsw", false, NONE, op1(E), 0 }, 142 { "invlpg", false, NONE, op2(MEx,2), "swapgs\0rdtscp" }, 143 }; 144 145 const char * const db_Grp8[] = { 146 "", 147 "", 148 "", 149 "", 150 "bt", 151 "bts", 152 "btr", 153 "btc" 154 }; 155 156 struct inst db_Grp9[] = { 157 { "fxsave", false, NONE, op1(E), 0 }, 158 { "fxrstor", false, NONE, op1(E), 0 }, 159 { "ldmxcsr", false, NONE, op1(E), 0 }, 160 { "stmxcsr", false, NONE, op1(E), 0 }, 161 { "xsave", false, NONE, op1(E), 0 }, 162 { "xrstor", false, NONE, op2(MEx,1), "lfence" }, 163 { "xsaveopt", false, NONE, op2(MEx,1), "mfence" }, 164 { "clflush", false, NONE, op2(MEx,1), "sfence" }, 165 }; 166 167 const char * db_GrpA[] = { 168 "", "cmpxchg8b", "", "", 169 "", "", "rdrand", "rdseed" 170 }; 171 172 const char * db_GrpB[] = { 173 "xstore-rng", "xcrypt-ecb", "xcrypt-cbc", "xcrypt-ctr", 174 "xcrypt-cfb", "xcrypt-ofb", "", "" 175 }; 176 177 const char * db_GrpC[] = { 178 "montmul", "xsha1", "xsha256", "", 179 "", "", "", "" 180 }; 181 182 const struct inst db_inst_0f0x[] = { 183 /*00*/ { NULL, true, NONE, op1(Ew), db_Grp6 }, 184 /*01*/ { "", true, RDEP, op1(Ew), db_Grp7 }, 185 /*02*/ { "lar", true, LONG, op2(E,R), 0 }, 186 /*03*/ { "lsl", true, LONG, op2(E,R), 0 }, 187 /*04*/ { "", false, NONE, 0, 0 }, 188 /*05*/ { "", false, NONE, 0, 0 }, 189 /*06*/ { "clts", false, NONE, 0, 0 }, 190 /*07*/ { "", false, NONE, 0, 0 }, 191 192 /*08*/ { "invd", false, NONE, 0, 0 }, 193 /*09*/ { "wbinvd",false, NONE, 0, 0 }, 194 /*0a*/ { "", false, NONE, 0, 0 }, 195 /*0b*/ { "", false, NONE, 0, 0 }, 196 /*0c*/ { "", false, NONE, 0, 0 }, 197 /*0d*/ { "", false, NONE, 0, 0 }, 198 /*0e*/ { "", false, NONE, 0, 0 }, 199 /*0f*/ { "", false, NONE, 0, 0 }, 200 }; 201 202 const struct inst db_inst_0f2x[] = { 203 /*20*/ { "mov", true, LONG, op2(CR,El), 0 }, 204 /*21*/ { "mov", true, LONG, op2(DR,El), 0 }, 205 /*22*/ { "mov", true, LONG, op2(El,CR), 0 }, 206 /*23*/ { "mov", true, LONG, op2(El,DR), 0 }, 207 /*24*/ { "mov", true, LONG, op2(TR,El), 0 }, 208 /*25*/ { "", false, NONE, 0, 0 }, 209 /*26*/ { "mov", true, LONG, op2(El,TR), 0 }, 210 /*27*/ { "", false, NONE, 0, 0 }, 211 212 /*28*/ { "", false, NONE, 0, 0 }, 213 /*29*/ { "", false, NONE, 0, 0 }, 214 /*2a*/ { "", false, NONE, 0, 0 }, 215 /*2b*/ { "", false, NONE, 0, 0 }, 216 /*2c*/ { "", false, NONE, 0, 0 }, 217 /*2d*/ { "", false, NONE, 0, 0 }, 218 /*2e*/ { "", false, NONE, 0, 0 }, 219 /*2f*/ { "", false, NONE, 0, 0 }, 220 }; 221 222 const struct inst db_inst_0f3x[] = { 223 /*30*/ { "wrmsr", false, NONE, 0, 0 }, 224 /*31*/ { "rdtsc", false, NONE, 0, 0 }, 225 /*32*/ { "rdmsr", false, NONE, 0, 0 }, 226 /*33*/ { "rdpmc", false, NONE, 0, 0 }, 227 /*34*/ { "sysenter",false,NONE, 0, 0 }, 228 /*35*/ { "sysexit",false, NONE, 0, 0 }, 229 /*36*/ { "", false, NONE, 0, 0 }, 230 /*37*/ { "getsec",false, NONE, 0, 0 }, 231 232 /*38*/ { "", false, NONE, 0, 0 }, 233 /*39*/ { "", false, NONE, 0, 0 }, 234 /*3a*/ { "", false, NONE, 0, 0 }, 235 /*3b*/ { "", false, NONE, 0, 0 }, 236 /*3c*/ { "", false, NONE, 0, 0 }, 237 /*3d*/ { "", false, NONE, 0, 0 }, 238 /*3e*/ { "", false, NONE, 0, 0 }, 239 /*3f*/ { "", false, NONE, 0, 0 }, 240 }; 241 242 const struct inst db_inst_0f4x[] = { 243 /*40*/ { "cmovo", true, LONG, op2(E,R), 0 }, 244 /*41*/ { "cmovno", true, LONG, op2(E,R), 0 }, 245 /*42*/ { "cmovc", true, LONG, op2(E,R), 0 }, 246 /*43*/ { "cmovnc", true, LONG, op2(E,R), 0 }, 247 /*44*/ { "cmovz", true, LONG, op2(E,R), 0 }, 248 /*45*/ { "cmovnz", true, LONG, op2(E,R), 0 }, 249 /*46*/ { "cmovbe", true, LONG, op2(E,R), 0 }, 250 /*47*/ { "cmovmbe",true, LONG, op2(E,R), 0 }, 251 252 /*48*/ { "cmovs", true, LONG, op2(E,R), 0 }, 253 /*49*/ { "cmovns", true, LONG, op2(E,R), 0 }, 254 /*4a*/ { "cmovp", true, LONG, op2(E,R), 0 }, 255 /*4b*/ { "cmovnp", true, LONG, op2(E,R), 0 }, 256 /*4c*/ { "cmovl", true, LONG, op2(E,R), 0 }, 257 /*4d*/ { "cmovnl", true, LONG, op2(E,R), 0 }, 258 /*4e*/ { "cmovle", true, LONG, op2(E,R), 0 }, 259 /*4f*/ { "cmovnle",true, LONG, op2(E,R), 0 }, 260 }; 261 262 const struct inst db_inst_0f8x[] = { 263 /*80*/ { "jo", false, NONE, op1(Dl), 0 }, 264 /*81*/ { "jno", false, NONE, op1(Dl), 0 }, 265 /*82*/ { "jb", false, NONE, op1(Dl), 0 }, 266 /*83*/ { "jnb", false, NONE, op1(Dl), 0 }, 267 /*84*/ { "jz", false, NONE, op1(Dl), 0 }, 268 /*85*/ { "jnz", false, NONE, op1(Dl), 0 }, 269 /*86*/ { "jbe", false, NONE, op1(Dl), 0 }, 270 /*87*/ { "jnbe", false, NONE, op1(Dl), 0 }, 271 272 /*88*/ { "js", false, NONE, op1(Dl), 0 }, 273 /*89*/ { "jns", false, NONE, op1(Dl), 0 }, 274 /*8a*/ { "jp", false, NONE, op1(Dl), 0 }, 275 /*8b*/ { "jnp", false, NONE, op1(Dl), 0 }, 276 /*8c*/ { "jl", false, NONE, op1(Dl), 0 }, 277 /*8d*/ { "jnl", false, NONE, op1(Dl), 0 }, 278 /*8e*/ { "jle", false, NONE, op1(Dl), 0 }, 279 /*8f*/ { "jnle", false, NONE, op1(Dl), 0 }, 280 }; 281 282 const struct inst db_inst_0f9x[] = { 283 /*90*/ { "seto", true, NONE, op1(Eb), 0 }, 284 /*91*/ { "setno", true, NONE, op1(Eb), 0 }, 285 /*92*/ { "setb", true, NONE, op1(Eb), 0 }, 286 /*93*/ { "setnb", true, NONE, op1(Eb), 0 }, 287 /*94*/ { "setz", true, NONE, op1(Eb), 0 }, 288 /*95*/ { "setnz", true, NONE, op1(Eb), 0 }, 289 /*96*/ { "setbe", true, NONE, op1(Eb), 0 }, 290 /*97*/ { "setnbe",true, NONE, op1(Eb), 0 }, 291 292 /*98*/ { "sets", true, NONE, op1(Eb), 0 }, 293 /*99*/ { "setns", true, NONE, op1(Eb), 0 }, 294 /*9a*/ { "setp", true, NONE, op1(Eb), 0 }, 295 /*9b*/ { "setnp", true, NONE, op1(Eb), 0 }, 296 /*9c*/ { "setl", true, NONE, op1(Eb), 0 }, 297 /*9d*/ { "setnl", true, NONE, op1(Eb), 0 }, 298 /*9e*/ { "setle", true, NONE, op1(Eb), 0 }, 299 /*9f*/ { "setnle",true, NONE, op1(Eb), 0 }, 300 }; 301 302 const struct inst db_inst_0fax[] = { 303 /*a0*/ { "push", false, NONE, op1(Si), 0 }, 304 /*a1*/ { "pop", false, NONE, op1(Si), 0 }, 305 /*a2*/ { "cpuid", false, NONE, 0, 0 }, 306 /*a3*/ { "bt", true, LONG, op2(R,E), 0 }, 307 /*a4*/ { "shld", true, LONG, op3(Ib,R,E), 0 }, 308 /*a5*/ { "shld", true, LONG, op3(CL,R,E), 0 }, 309 /*a6*/ { NULL, true, NONE, 0, db_GrpC }, 310 /*a7*/ { NULL, true, NONE, 0, db_GrpB }, 311 312 /*a8*/ { "push", false, NONE, op1(Si), 0 }, 313 /*a9*/ { "pop", false, NONE, op1(Si), 0 }, 314 /*aa*/ { "rsm", false, NONE, 0, 0 }, 315 /*ab*/ { "bts", true, LONG, op2(R,E), 0 }, 316 /*ac*/ { "shrd", true, LONG, op3(Ib,R,E), 0 }, 317 /*ad*/ { "shrd", true, LONG, op3(CL,R,E), 0 }, 318 /*ae*/ { "", true, RDEP, op1(E), db_Grp9 }, 319 /*af*/ { "imul", true, LONG, op2(E,R), 0 }, 320 }; 321 322 const struct inst db_inst_0fbx[] = { 323 /*b0*/ { "cmpxchg",true, BYTE, op2(R, E), 0 }, 324 /*b1*/ { "cmpxchg",true, LONG, op2(R, E), 0 }, 325 /*b2*/ { "lss", true, LONG, op2(E, R), 0 }, 326 /*b3*/ { "btr", true, LONG, op2(R, E), 0 }, 327 /*b4*/ { "lfs", true, LONG, op2(E, R), 0 }, 328 /*b5*/ { "lgs", true, LONG, op2(E, R), 0 }, 329 /*b6*/ { "movzb", true, LONG, op2(E, R), 0 }, 330 /*b7*/ { "movzw", true, LONG, op2(E, R), 0 }, 331 332 /*b8*/ { "", false, NONE, 0, 0 }, 333 /*b9*/ { "", false, NONE, 0, 0 }, 334 /*ba*/ { NULL, true, LONG, op2(Ib, E), db_Grp8 }, 335 /*bb*/ { "btc", true, LONG, op2(R, E), 0 }, 336 /*bc*/ { "bsf", true, LONG, op2(E, R), 0 }, 337 /*bd*/ { "bsr", true, LONG, op2(E, R), 0 }, 338 /*be*/ { "movsb", true, LONG, op2(E, R), 0 }, 339 /*bf*/ { "movsw", true, LONG, op2(E, R), 0 }, 340 }; 341 342 const struct inst db_inst_0fcx[] = { 343 /*c0*/ { "xadd", true, BYTE, op2(R, E), 0 }, 344 /*c1*/ { "xadd", true, LONG, op2(R, E), 0 }, 345 /*c2*/ { "", false, NONE, 0, 0 }, 346 /*c3*/ { "", false, NONE, 0, 0 }, 347 /*c4*/ { "", false, NONE, 0, 0 }, 348 /*c5*/ { "", false, NONE, 0, 0 }, 349 /*c6*/ { "", false, NONE, 0, 0 }, 350 /*c7*/ { NULL, true, NONE, op1(E), db_GrpA }, 351 352 /*c8*/ { "bswap", false, LONG, op1(Ril), 0 }, 353 /*c9*/ { "bswap", false, LONG, op1(Ril), 0 }, 354 /*ca*/ { "bswap", false, LONG, op1(Ril), 0 }, 355 /*cb*/ { "bswap", false, LONG, op1(Ril), 0 }, 356 /*cc*/ { "bswap", false, LONG, op1(Ril), 0 }, 357 /*cd*/ { "bswap", false, LONG, op1(Ril), 0 }, 358 /*ce*/ { "bswap", false, LONG, op1(Ril), 0 }, 359 /*cf*/ { "bswap", false, LONG, op1(Ril), 0 }, 360 }; 361 362 const struct inst * const db_inst_0f[] = { 363 db_inst_0f0x, 364 NULL, 365 db_inst_0f2x, 366 db_inst_0f3x, 367 db_inst_0f4x, 368 NULL, 369 NULL, 370 NULL, 371 db_inst_0f8x, 372 db_inst_0f9x, 373 db_inst_0fax, 374 db_inst_0fbx, 375 db_inst_0fcx, 376 NULL, 377 NULL, 378 NULL 379 }; 380 381 const char * const db_Esc92[] = { 382 "fnop", "", "", "", "", "", "", "" 383 }; 384 const char * const db_Esc93[] = { 385 "", "", "", "", "", "", "", "" 386 }; 387 const char * const db_Esc94[] = { 388 "fchs", "fabs", "", "", "ftst", "fxam", "", "" 389 }; 390 const char * const db_Esc95[] = { 391 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" 392 }; 393 const char * const db_Esc96[] = { 394 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", 395 "fincstp" 396 }; 397 const char * const db_Esc97[] = { 398 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" 399 }; 400 401 const char * const db_Esca4[] = { 402 "", "fucompp","", "", "", "", "", "" 403 }; 404 405 const char * const db_Escb4[] = { 406 "", "", "fnclex","fninit","", "", "", "" 407 }; 408 409 const char * const db_Esce3[] = { 410 "", "fcompp","", "", "", "", "", "" 411 }; 412 413 const char * const db_Escf4[] = { 414 "fnstsw","", "", "", "", "", "", "" 415 }; 416 417 const struct finst db_Esc8[] = { 418 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, 419 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, 420 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, 421 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, 422 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, 423 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, 424 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, 425 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, 426 }; 427 428 const struct finst db_Esc9[] = { 429 /*0*/ { "fld", SNGL, op1(STI), 0 }, 430 /*1*/ { "", NONE, op1(STI), "fxch" }, 431 /*2*/ { "fst", SNGL, op1(X), db_Esc92 }, 432 /*3*/ { "fstp", SNGL, op1(X), db_Esc93 }, 433 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, 434 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, 435 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, 436 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, 437 }; 438 439 const struct finst db_Esca[] = { 440 /*0*/ { "fiadd", WORD, 0, 0 }, 441 /*1*/ { "fimul", WORD, 0, 0 }, 442 /*2*/ { "ficom", WORD, 0, 0 }, 443 /*3*/ { "ficomp", WORD, 0, 0 }, 444 /*4*/ { "fisub", WORD, op1(X), db_Esca4 }, 445 /*5*/ { "fisubr", WORD, 0, 0 }, 446 /*6*/ { "fidiv", WORD, 0, 0 }, 447 /*7*/ { "fidivr", WORD, 0, 0 } 448 }; 449 450 const struct finst db_Escb[] = { 451 /*0*/ { "fild", WORD, 0, 0 }, 452 /*1*/ { "", NONE, 0, 0 }, 453 /*2*/ { "fist", WORD, 0, 0 }, 454 /*3*/ { "fistp", WORD, 0, 0 }, 455 /*4*/ { "", WORD, op1(X), db_Escb4 }, 456 /*5*/ { "fld", EXTR, 0, 0 }, 457 /*6*/ { "", WORD, 0, 0 }, 458 /*7*/ { "fstp", EXTR, 0, 0 }, 459 }; 460 461 const struct finst db_Escc[] = { 462 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, 463 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, 464 /*2*/ { "fcom", DBLR, op2(ST,STI), 0 }, 465 /*3*/ { "fcomp", DBLR, op2(ST,STI), 0 }, 466 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, 467 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, 468 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, 469 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, 470 }; 471 472 const struct finst db_Escd[] = { 473 /*0*/ { "fld", DBLR, op1(STI), "ffree" }, 474 /*1*/ { "", NONE, 0, 0 }, 475 /*2*/ { "fst", DBLR, op1(STI), 0 }, 476 /*3*/ { "fstp", DBLR, op1(STI), 0 }, 477 /*4*/ { "frstor", NONE, op1(STI), "fucom" }, 478 /*5*/ { "", NONE, op1(STI), "fucomp" }, 479 /*6*/ { "fnsave", NONE, 0, 0 }, 480 /*7*/ { "fnstsw", NONE, 0, 0 }, 481 }; 482 483 const struct finst db_Esce[] = { 484 /*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" }, 485 /*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" }, 486 /*2*/ { "ficom", LONG, 0, 0 }, 487 /*3*/ { "ficomp", LONG, op1(X), db_Esce3 }, 488 /*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" }, 489 /*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" }, 490 /*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" }, 491 /*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" }, 492 }; 493 494 const struct finst db_Escf[] = { 495 /*0*/ { "fild", LONG, 0, 0 }, 496 /*1*/ { "", LONG, 0, 0 }, 497 /*2*/ { "fist", LONG, 0, 0 }, 498 /*3*/ { "fistp", LONG, 0, 0 }, 499 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, 500 /*5*/ { "fld", QUAD, 0, 0 }, 501 /*6*/ { "fbstp", NONE, 0, 0 }, 502 /*7*/ { "fstp", QUAD, 0, 0 }, 503 }; 504 505 const struct finst * const db_Esc_inst[] = { 506 db_Esc8, db_Esc9, db_Esca, db_Escb, 507 db_Escc, db_Escd, db_Esce, db_Escf 508 }; 509 510 const char * const db_Grp1[] = { 511 "add", 512 "or", 513 "adc", 514 "sbb", 515 "and", 516 "sub", 517 "xor", 518 "cmp" 519 }; 520 521 const char * const db_Grp2[] = { 522 "rol", 523 "ror", 524 "rcl", 525 "rcr", 526 "shl", 527 "shr", 528 "shl", 529 "sar" 530 }; 531 532 const struct inst db_Grp3[] = { 533 { "test", true, NONE, op2(I,E), 0 }, 534 { "test", true, NONE, op2(I,E), 0 }, 535 { "not", true, NONE, op1(E), 0 }, 536 { "neg", true, NONE, op1(E), 0 }, 537 { "mul", true, NONE, op2(E,A), 0 }, 538 { "imul", true, NONE, op2(E,A), 0 }, 539 { "div", true, NONE, op2(E,A), 0 }, 540 { "idiv", true, NONE, op2(E,A), 0 }, 541 }; 542 543 const struct inst db_Grp4[] = { 544 { "inc", true, BYTE, op1(E), 0 }, 545 { "dec", true, BYTE, op1(E), 0 }, 546 { "", true, NONE, 0, 0 }, 547 { "", true, NONE, 0, 0 }, 548 { "", true, NONE, 0, 0 }, 549 { "", true, NONE, 0, 0 }, 550 { "", true, NONE, 0, 0 }, 551 { "", true, NONE, 0, 0 } 552 }; 553 554 const struct inst db_Grp5[] = { 555 { "inc", true, LONG, op1(E), 0 }, 556 { "dec", true, LONG, op1(E), 0 }, 557 { "call", true, NONE, op1(Eind),0 }, 558 { "lcall", true, NONE, op1(Eind),0 }, 559 { "jmp", true, NONE, op1(Eind),0 }, 560 { "ljmp", true, NONE, op1(Eind),0 }, 561 { "push", true, LONG, op1(E), 0 }, 562 { "", true, NONE, 0, 0 } 563 }; 564 565 const struct inst db_inst_table[256] = { 566 /*00*/ { "add", true, BYTE, op2(R, E), 0 }, 567 /*01*/ { "add", true, LONG, op2(R, E), 0 }, 568 /*02*/ { "add", true, BYTE, op2(E, R), 0 }, 569 /*03*/ { "add", true, LONG, op2(E, R), 0 }, 570 /*04*/ { "add", false, BYTE, op2(Is, A), 0 }, 571 /*05*/ { "add", false, LONG, op2(Is, A), 0 }, 572 /*06*/ { "push", false, NONE, op1(Si), 0 }, 573 /*07*/ { "pop", false, NONE, op1(Si), 0 }, 574 575 /*08*/ { "or", true, BYTE, op2(R, E), 0 }, 576 /*09*/ { "or", true, LONG, op2(R, E), 0 }, 577 /*0a*/ { "or", true, BYTE, op2(E, R), 0 }, 578 /*0b*/ { "or", true, LONG, op2(E, R), 0 }, 579 /*0c*/ { "or", false, BYTE, op2(I, A), 0 }, 580 /*0d*/ { "or", false, LONG, op2(I, A), 0 }, 581 /*0e*/ { "push", false, NONE, op1(Si), 0 }, 582 /*0f*/ { "", false, NONE, 0, 0 }, 583 584 /*10*/ { "adc", true, BYTE, op2(R, E), 0 }, 585 /*11*/ { "adc", true, LONG, op2(R, E), 0 }, 586 /*12*/ { "adc", true, BYTE, op2(E, R), 0 }, 587 /*13*/ { "adc", true, LONG, op2(E, R), 0 }, 588 /*14*/ { "adc", false, BYTE, op2(Is, A), 0 }, 589 /*15*/ { "adc", false, LONG, op2(Is, A), 0 }, 590 /*16*/ { "push", false, NONE, op1(Si), 0 }, 591 /*17*/ { "pop", false, NONE, op1(Si), 0 }, 592 593 /*18*/ { "sbb", true, BYTE, op2(R, E), 0 }, 594 /*19*/ { "sbb", true, LONG, op2(R, E), 0 }, 595 /*1a*/ { "sbb", true, BYTE, op2(E, R), 0 }, 596 /*1b*/ { "sbb", true, LONG, op2(E, R), 0 }, 597 /*1c*/ { "sbb", false, BYTE, op2(Is, A), 0 }, 598 /*1d*/ { "sbb", false, LONG, op2(Is, A), 0 }, 599 /*1e*/ { "push", false, NONE, op1(Si), 0 }, 600 /*1f*/ { "pop", false, NONE, op1(Si), 0 }, 601 602 /*20*/ { "and", true, BYTE, op2(R, E), 0 }, 603 /*21*/ { "and", true, LONG, op2(R, E), 0 }, 604 /*22*/ { "and", true, BYTE, op2(E, R), 0 }, 605 /*23*/ { "and", true, LONG, op2(E, R), 0 }, 606 /*24*/ { "and", false, BYTE, op2(I, A), 0 }, 607 /*25*/ { "and", false, LONG, op2(I, A), 0 }, 608 /*26*/ { "", false, NONE, 0, 0 }, 609 /*27*/ { "daa", false, NONE, 0, 0 }, 610 611 /*28*/ { "sub", true, BYTE, op2(R, E), 0 }, 612 /*29*/ { "sub", true, LONG, op2(R, E), 0 }, 613 /*2a*/ { "sub", true, BYTE, op2(E, R), 0 }, 614 /*2b*/ { "sub", true, LONG, op2(E, R), 0 }, 615 /*2c*/ { "sub", false, BYTE, op2(I, A), 0 }, 616 /*2d*/ { "sub", false, LONG, op2(Is, A), 0 }, 617 /*2e*/ { "", false, NONE, 0, 0 }, 618 /*2f*/ { "das", false, NONE, 0, 0 }, 619 620 /*30*/ { "xor", true, BYTE, op2(R, E), 0 }, 621 /*31*/ { "xor", true, LONG, op2(R, E), 0 }, 622 /*32*/ { "xor", true, BYTE, op2(E, R), 0 }, 623 /*33*/ { "xor", true, LONG, op2(E, R), 0 }, 624 /*34*/ { "xor", false, BYTE, op2(I, A), 0 }, 625 /*35*/ { "xor", false, LONG, op2(I, A), 0 }, 626 /*36*/ { "", false, NONE, 0, 0 }, 627 /*37*/ { "aaa", false, NONE, 0, 0 }, 628 629 /*38*/ { "cmp", true, BYTE, op2(R, E), 0 }, 630 /*39*/ { "cmp", true, LONG, op2(R, E), 0 }, 631 /*3a*/ { "cmp", true, BYTE, op2(E, R), 0 }, 632 /*3b*/ { "cmp", true, LONG, op2(E, R), 0 }, 633 /*3c*/ { "cmp", false, BYTE, op2(Is, A), 0 }, 634 /*3d*/ { "cmp", false, LONG, op2(Is, A), 0 }, 635 /*3e*/ { "", false, NONE, 0, 0 }, 636 /*3f*/ { "aas", false, NONE, 0, 0 }, 637 638 /*40*/ { "inc", false, LONG, op1(Ri), 0 }, 639 /*41*/ { "inc", false, LONG, op1(Ri), 0 }, 640 /*42*/ { "inc", false, LONG, op1(Ri), 0 }, 641 /*43*/ { "inc", false, LONG, op1(Ri), 0 }, 642 /*44*/ { "inc", false, LONG, op1(Ri), 0 }, 643 /*45*/ { "inc", false, LONG, op1(Ri), 0 }, 644 /*46*/ { "inc", false, LONG, op1(Ri), 0 }, 645 /*47*/ { "inc", false, LONG, op1(Ri), 0 }, 646 647 /*48*/ { "dec", false, LONG, op1(Ri), 0 }, 648 /*49*/ { "dec", false, LONG, op1(Ri), 0 }, 649 /*4a*/ { "dec", false, LONG, op1(Ri), 0 }, 650 /*4b*/ { "dec", false, LONG, op1(Ri), 0 }, 651 /*4c*/ { "dec", false, LONG, op1(Ri), 0 }, 652 /*4d*/ { "dec", false, LONG, op1(Ri), 0 }, 653 /*4e*/ { "dec", false, LONG, op1(Ri), 0 }, 654 /*4f*/ { "dec", false, LONG, op1(Ri), 0 }, 655 656 /*50*/ { "push", false, LONG, op1(Ri), 0 }, 657 /*51*/ { "push", false, LONG, op1(Ri), 0 }, 658 /*52*/ { "push", false, LONG, op1(Ri), 0 }, 659 /*53*/ { "push", false, LONG, op1(Ri), 0 }, 660 /*54*/ { "push", false, LONG, op1(Ri), 0 }, 661 /*55*/ { "push", false, LONG, op1(Ri), 0 }, 662 /*56*/ { "push", false, LONG, op1(Ri), 0 }, 663 /*57*/ { "push", false, LONG, op1(Ri), 0 }, 664 665 /*58*/ { "pop", false, LONG, op1(Ri), 0 }, 666 /*59*/ { "pop", false, LONG, op1(Ri), 0 }, 667 /*5a*/ { "pop", false, LONG, op1(Ri), 0 }, 668 /*5b*/ { "pop", false, LONG, op1(Ri), 0 }, 669 /*5c*/ { "pop", false, LONG, op1(Ri), 0 }, 670 /*5d*/ { "pop", false, LONG, op1(Ri), 0 }, 671 /*5e*/ { "pop", false, LONG, op1(Ri), 0 }, 672 /*5f*/ { "pop", false, LONG, op1(Ri), 0 }, 673 674 /*60*/ { "pusha", false, LONG, 0, 0 }, 675 /*61*/ { "popa", false, LONG, 0, 0 }, 676 /*62*/ { "bound", true, LONG, op2(E, R), 0 }, 677 /*63*/ { "arpl", true, NONE, op2(Ew,Rw), 0 }, 678 /*64*/ { "", false, NONE, 0, 0 }, 679 /*65*/ { "", false, NONE, 0, 0 }, 680 /*66*/ { "", false, NONE, 0, 0 }, 681 /*67*/ { "", false, NONE, 0, 0 }, 682 683 /*68*/ { "push", false, LONG, op1(I), 0 }, 684 /*69*/ { "imul", true, LONG, op3(I,E,R), 0 }, 685 /*6a*/ { "push", false, LONG, op1(Ib), 0 }, 686 /*6b*/ { "imul", true, LONG, op3(Ibs,E,R),0 }, 687 /*6c*/ { "ins", false, BYTE, op2(DX, DI), 0 }, 688 /*6d*/ { "ins", false, LONG, op2(DX, DI), 0 }, 689 /*6e*/ { "outs", false, BYTE, op2(SI, DX), 0 }, 690 /*6f*/ { "outs", false, LONG, op2(SI, DX), 0 }, 691 692 /*70*/ { "jo", false, NONE, op1(Db), 0 }, 693 /*71*/ { "jno", false, NONE, op1(Db), 0 }, 694 /*72*/ { "jb", false, NONE, op1(Db), 0 }, 695 /*73*/ { "jnb", false, NONE, op1(Db), 0 }, 696 /*74*/ { "jz", false, NONE, op1(Db), 0 }, 697 /*75*/ { "jnz", false, NONE, op1(Db), 0 }, 698 /*76*/ { "jbe", false, NONE, op1(Db), 0 }, 699 /*77*/ { "jnbe", false, NONE, op1(Db), 0 }, 700 701 /*78*/ { "js", false, NONE, op1(Db), 0 }, 702 /*79*/ { "jns", false, NONE, op1(Db), 0 }, 703 /*7a*/ { "jp", false, NONE, op1(Db), 0 }, 704 /*7b*/ { "jnp", false, NONE, op1(Db), 0 }, 705 /*7c*/ { "jl", false, NONE, op1(Db), 0 }, 706 /*7d*/ { "jnl", false, NONE, op1(Db), 0 }, 707 /*7e*/ { "jle", false, NONE, op1(Db), 0 }, 708 /*7f*/ { "jnle", false, NONE, op1(Db), 0 }, 709 710 /*80*/ { NULL, true, BYTE, op2(I, E), db_Grp1 }, 711 /*81*/ { NULL, true, LONG, op2(I, E), db_Grp1 }, 712 /*82*/ { NULL, true, BYTE, op2(I,E), db_Grp1 }, 713 /*83*/ { NULL, true, LONG, op2(Ibs,E), db_Grp1 }, 714 /*84*/ { "test", true, BYTE, op2(R, E), 0 }, 715 /*85*/ { "test", true, LONG, op2(R, E), 0 }, 716 /*86*/ { "xchg", true, BYTE, op2(R, E), 0 }, 717 /*87*/ { "xchg", true, LONG, op2(R, E), 0 }, 718 719 /*88*/ { "mov", true, BYTE, op2(R, E), 0 }, 720 /*89*/ { "mov", true, LONG, op2(R, E), 0 }, 721 /*8a*/ { "mov", true, BYTE, op2(E, R), 0 }, 722 /*8b*/ { "mov", true, LONG, op2(E, R), 0 }, 723 /*8c*/ { "mov", true, NONE, op2(S, Ew), 0 }, 724 /*8d*/ { "lea", true, LONG, op2(E, R), 0 }, 725 /*8e*/ { "mov", true, NONE, op2(Ew, S), 0 }, 726 /*8f*/ { "pop", true, LONG, op1(E), 0 }, 727 728 /*90*/ { "nop", false, NONE, 0, 0 }, 729 /*91*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 730 /*92*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 731 /*93*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 732 /*94*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 733 /*95*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 734 /*96*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 735 /*97*/ { "xchg", false, LONG, op2(A, Ri), 0 }, 736 737 /*98*/ { "cbw", false, SDEP, 0, "cwde" }, /* cbw/cwde */ 738 /*99*/ { "cwd", false, SDEP, 0, "cdq" }, /* cwd/cdq */ 739 /*9a*/ { "lcall", false, NONE, op1(OS), 0 }, 740 /*9b*/ { "wait", false, NONE, 0, 0 }, 741 /*9c*/ { "pushf", false, LONG, 0, 0 }, 742 /*9d*/ { "popf", false, LONG, 0, 0 }, 743 /*9e*/ { "sahf", false, NONE, 0, 0 }, 744 /*9f*/ { "lahf", false, NONE, 0, 0 }, 745 746 /*a0*/ { "mov", false, BYTE, op2(O, A), 0 }, 747 /*a1*/ { "mov", false, LONG, op2(O, A), 0 }, 748 /*a2*/ { "mov", false, BYTE, op2(A, O), 0 }, 749 /*a3*/ { "mov", false, LONG, op2(A, O), 0 }, 750 /*a4*/ { "movs", false, BYTE, op2(SI,DI), 0 }, 751 /*a5*/ { "movs", false, LONG, op2(SI,DI), 0 }, 752 /*a6*/ { "cmps", false, BYTE, op2(SI,DI), 0 }, 753 /*a7*/ { "cmps", false, LONG, op2(SI,DI), 0 }, 754 755 /*a8*/ { "test", false, BYTE, op2(I, A), 0 }, 756 /*a9*/ { "test", false, LONG, op2(I, A), 0 }, 757 /*aa*/ { "stos", false, BYTE, op1(DI), 0 }, 758 /*ab*/ { "stos", false, LONG, op1(DI), 0 }, 759 /*ac*/ { "lods", false, BYTE, op1(SI), 0 }, 760 /*ad*/ { "lods", false, LONG, op1(SI), 0 }, 761 /*ae*/ { "scas", false, BYTE, op1(SI), 0 }, 762 /*af*/ { "scas", false, LONG, op1(SI), 0 }, 763 764 /*b0*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 765 /*b1*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 766 /*b2*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 767 /*b3*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 768 /*b4*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 769 /*b5*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 770 /*b6*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 771 /*b7*/ { "mov", false, BYTE, op2(I, Ri), 0 }, 772 773 /*b8*/ { "mov", false, LONG, op2(I, Ri), 0 }, 774 /*b9*/ { "mov", false, LONG, op2(I, Ri), 0 }, 775 /*ba*/ { "mov", false, LONG, op2(I, Ri), 0 }, 776 /*bb*/ { "mov", false, LONG, op2(I, Ri), 0 }, 777 /*bc*/ { "mov", false, LONG, op2(I, Ri), 0 }, 778 /*bd*/ { "mov", false, LONG, op2(I, Ri), 0 }, 779 /*be*/ { "mov", false, LONG, op2(I, Ri), 0 }, 780 /*bf*/ { "mov", false, LONG, op2(I, Ri), 0 }, 781 782 /*c0*/ { NULL, true, BYTE, op2(Ib, E), db_Grp2 }, 783 /*c1*/ { NULL, true, LONG, op2(Ib, E), db_Grp2 }, 784 /*c2*/ { "ret", false, NONE, op1(Iw), 0 }, 785 /*c3*/ { "ret", false, NONE, 0, 0 }, 786 /*c4*/ { "les", true, LONG, op2(E, R), 0 }, 787 /*c5*/ { "lds", true, LONG, op2(E, R), 0 }, 788 /*c6*/ { "mov", true, BYTE, op2(I, E), 0 }, 789 /*c7*/ { "mov", true, LONG, op2(I, E), 0 }, 790 791 /*c8*/ { "enter", false, NONE, op2(Ib, Iw), 0 }, 792 /*c9*/ { "leave", false, NONE, 0, 0 }, 793 /*ca*/ { "lret", false, NONE, op1(Iw), 0 }, 794 /*cb*/ { "lret", false, NONE, 0, 0 }, 795 /*cc*/ { "int", false, NONE, op1(o3), 0 }, 796 /*cd*/ { "int", false, NONE, op1(Ib), 0 }, 797 /*ce*/ { "into", false, NONE, 0, 0 }, 798 /*cf*/ { "iret", false, NONE, 0, 0 }, 799 800 /*d0*/ { NULL, true, BYTE, op2(o1, E), db_Grp2 }, 801 /*d1*/ { NULL, true, LONG, op2(o1, E), db_Grp2 }, 802 /*d2*/ { NULL, true, BYTE, op2(CL, E), db_Grp2 }, 803 /*d3*/ { NULL, true, LONG, op2(CL, E), db_Grp2 }, 804 /*d4*/ { "aam", true, NONE, op1(Iba), 0 }, 805 /*d5*/ { "aad", true, NONE, op1(Iba), 0 }, 806 /*d6*/ { ".byte\t0xd6",false, NONE, 0, 0 }, 807 /*d7*/ { "xlat", false, BYTE, op1(BX), 0 }, 808 809 /*d8*/ { "", true, NONE, 0, db_Esc8 }, 810 /*d9*/ { "", true, NONE, 0, db_Esc9 }, 811 /*da*/ { "", true, NONE, 0, db_Esca }, 812 /*db*/ { "", true, NONE, 0, db_Escb }, 813 /*dc*/ { "", true, NONE, 0, db_Escc }, 814 /*dd*/ { "", true, NONE, 0, db_Escd }, 815 /*de*/ { "", true, NONE, 0, db_Esce }, 816 /*df*/ { "", true, NONE, 0, db_Escf }, 817 818 /*e0*/ { "loopne",false, NONE, op1(Db), 0 }, 819 /*e1*/ { "loope", false, NONE, op1(Db), 0 }, 820 /*e2*/ { "loop", false, NONE, op1(Db), 0 }, 821 /*e3*/ { "jcxz", false, SDEP, op1(Db), "jecxz" }, 822 /*e4*/ { "in", false, BYTE, op2(Ib, A), 0 }, 823 /*e5*/ { "in", false, LONG, op2(Ib, A) , 0 }, 824 /*e6*/ { "out", false, BYTE, op2(A, Ib), 0 }, 825 /*e7*/ { "out", false, LONG, op2(A, Ib) , 0 }, 826 827 /*e8*/ { "call", false, NONE, op1(Dl), 0 }, 828 /*e9*/ { "jmp", false, NONE, op1(Dl), 0 }, 829 /*ea*/ { "ljmp", false, NONE, op1(OS), 0 }, 830 /*eb*/ { "jmp", false, NONE, op1(Db), 0 }, 831 /*ec*/ { "in", false, BYTE, op2(DX, A), 0 }, 832 /*ed*/ { "in", false, LONG, op2(DX, A) , 0 }, 833 /*ee*/ { "out", false, BYTE, op2(A, DX), 0 }, 834 /*ef*/ { "out", false, LONG, op2(A, DX) , 0 }, 835 836 /*f0*/ { "", false, NONE, 0, 0 }, 837 /*f1*/ { "", false, NONE, 0, 0 }, 838 /*f2*/ { "", false, NONE, 0, 0 }, 839 /*f3*/ { "", false, NONE, 0, 0 }, 840 /*f4*/ { "hlt", false, NONE, 0, 0 }, 841 /*f5*/ { "cmc", false, NONE, 0, 0 }, 842 /*f6*/ { "", true, BYTE, 0, db_Grp3 }, 843 /*f7*/ { "", true, LONG, 0, db_Grp3 }, 844 845 /*f8*/ { "clc", false, NONE, 0, 0 }, 846 /*f9*/ { "stc", false, NONE, 0, 0 }, 847 /*fa*/ { "cli", false, NONE, 0, 0 }, 848 /*fb*/ { "sti", false, NONE, 0, 0 }, 849 /*fc*/ { "cld", false, NONE, 0, 0 }, 850 /*fd*/ { "std", false, NONE, 0, 0 }, 851 /*fe*/ { "", true, RDEP, 0, db_Grp4 }, 852 /*ff*/ { "", true, RDEP, 0, db_Grp5 }, 853 }; 854 855 const struct inst db_bad_inst = 856 { "???", false, NONE, 0, 0 } 857 ; 858 859 #define f_mod(byte) ((byte)>>6) 860 #define f_reg(byte) (((byte)>>3)&0x7) 861 #define f_rm(byte) ((byte)&0x7) 862 863 #define sib_ss(byte) ((byte)>>6) 864 #define sib_index(byte) (((byte)>>3)&0x7) 865 #define sib_base(byte) ((byte)&0x7) 866 867 struct i_addr { 868 int is_reg; /* if reg, reg number is in 'disp' */ 869 int disp; 870 const char * base; 871 const char * index; 872 int ss; 873 }; 874 875 const char * const db_index_reg_16[8] = { 876 "%bx,%si", 877 "%bx,%di", 878 "%bp,%si", 879 "%bp,%di", 880 "%si", 881 "%di", 882 "%bp", 883 "%bx" 884 }; 885 886 const char * const db_reg[3][8] = { 887 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, 888 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, 889 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } 890 }; 891 892 const char * const db_seg_reg[8] = { 893 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" 894 }; 895 896 /* 897 * lengths for size attributes 898 */ 899 const int db_lengths[] = { 900 1, /* BYTE */ 901 2, /* WORD */ 902 4, /* LONG */ 903 8, /* QUAD */ 904 4, /* SNGL */ 905 8, /* DBLR */ 906 10, /* EXTR */ 907 }; 908 909 #define get_value_inc(result, loc, size, is_signed) \ 910 do { \ 911 result = db_get_value((loc), (size), (is_signed)); \ 912 (loc) += (size); \ 913 } while (0) 914 915 916 db_addr_t db_read_address(db_addr_t, int, int, struct i_addr *); 917 void db_print_address(const char *, int, struct i_addr *); 918 db_addr_t db_disasm_esc(db_addr_t, int, int, int, const char *); 919 920 /* 921 * Read address at location and return updated location. 922 */ 923 db_addr_t 924 db_read_address(db_addr_t loc, int short_addr, int regmodrm, struct i_addr *addrp) 925 /* addrp: out */ 926 { 927 int mod, rm, sib, index, disp; 928 929 mod = f_mod(regmodrm); 930 rm = f_rm(regmodrm); 931 932 if (mod == 3) { 933 addrp->is_reg = true; 934 addrp->disp = rm; 935 return (loc); 936 } 937 addrp->is_reg = false; 938 addrp->index = 0; 939 940 if (short_addr) { 941 addrp->index = 0; 942 addrp->ss = 0; 943 switch (mod) { 944 case 0: 945 if (rm == 6) { 946 get_value_inc(disp, loc, 2, false); 947 addrp->disp = disp; 948 addrp->base = 0; 949 } else { 950 addrp->disp = 0; 951 addrp->base = db_index_reg_16[rm]; 952 } 953 break; 954 case 1: 955 get_value_inc(disp, loc, 1, true); 956 addrp->disp = disp; 957 addrp->base = db_index_reg_16[rm]; 958 break; 959 case 2: 960 get_value_inc(disp, loc, 2, false); 961 addrp->disp = disp; 962 addrp->base = db_index_reg_16[rm]; 963 break; 964 } 965 } else { 966 if (mod != 3 && rm == 4) { 967 get_value_inc(sib, loc, 1, false); 968 rm = sib_base(sib); 969 index = sib_index(sib); 970 if (index != 4) 971 addrp->index = db_reg[LONG][index]; 972 addrp->ss = sib_ss(sib); 973 } 974 975 switch (mod) { 976 case 0: 977 if (rm == 5) { 978 get_value_inc(addrp->disp, loc, 4, false); 979 addrp->base = 0; 980 } else { 981 addrp->disp = 0; 982 addrp->base = db_reg[LONG][rm]; 983 } 984 break; 985 case 1: 986 get_value_inc(disp, loc, 1, true); 987 addrp->disp = disp; 988 addrp->base = db_reg[LONG][rm]; 989 break; 990 case 2: 991 get_value_inc(disp, loc, 4, false); 992 addrp->disp = disp; 993 addrp->base = db_reg[LONG][rm]; 994 break; 995 } 996 } 997 return (loc); 998 } 999 1000 void 1001 db_print_address(const char * seg, int size, struct i_addr *addrp) 1002 { 1003 if (addrp->is_reg) { 1004 db_printf("%s", db_reg[size][addrp->disp]); 1005 return; 1006 } 1007 1008 if (seg) 1009 db_printf("%s:", seg); 1010 1011 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY, db_printf); 1012 if (addrp->base != 0 || addrp->index != 0) { 1013 db_printf("("); 1014 if (addrp->base) 1015 db_printf("%s", addrp->base); 1016 if (addrp->index) 1017 db_printf(",%s,%d", addrp->index, 1<<addrp->ss); 1018 db_printf(")"); 1019 } 1020 } 1021 1022 /* 1023 * Disassemble floating-point ("escape") instruction 1024 * and return updated location. 1025 */ 1026 db_addr_t 1027 db_disasm_esc(db_addr_t loc, int inst, int short_addr, int size, const char *seg) 1028 { 1029 int regmodrm; 1030 const struct finst *fp; 1031 int mod; 1032 struct i_addr address; 1033 const char * name; 1034 1035 get_value_inc(regmodrm, loc, 1, false); 1036 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; 1037 mod = f_mod(regmodrm); 1038 if (mod != 3) { 1039 if (*fp->f_name == '\0') { 1040 db_printf("<bad instruction>"); 1041 return (loc); 1042 } 1043 1044 /* 1045 * Normal address modes. 1046 */ 1047 loc = db_read_address(loc, short_addr, regmodrm, &address); 1048 db_printf("%s", fp->f_name); 1049 switch (fp->f_size) { 1050 case SNGL: 1051 db_printf("s"); 1052 break; 1053 case DBLR: 1054 db_printf("l"); 1055 break; 1056 case EXTR: 1057 db_printf("t"); 1058 break; 1059 case WORD: 1060 db_printf("s"); 1061 break; 1062 case LONG: 1063 db_printf("l"); 1064 break; 1065 case QUAD: 1066 db_printf("q"); 1067 break; 1068 default: 1069 break; 1070 } 1071 db_printf("\t"); 1072 db_print_address(seg, BYTE, &address); 1073 } else { 1074 /* 1075 * 'reg-reg' - special formats 1076 */ 1077 switch (fp->f_rrmode) { 1078 case op2(ST,STI): 1079 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1080 db_printf("%s\t%%st,%%st(%d)", name, f_rm(regmodrm)); 1081 break; 1082 case op2(STI,ST): 1083 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1084 db_printf("%s\t%%st(%d),%%st", name, f_rm(regmodrm)); 1085 break; 1086 case op1(STI): 1087 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; 1088 db_printf("%s\t%%st(%d)", name, f_rm(regmodrm)); 1089 break; 1090 case op1(X): 1091 name = ((const char *const*)fp->f_rrname)[f_rm(regmodrm)]; 1092 if (*name == '\0') 1093 goto bad; 1094 db_printf("%s", name); 1095 break; 1096 case op1(XA): 1097 db_printf("%s\t%%ax", 1098 ((const char *const*)fp->f_rrname)[f_rm(regmodrm)]); 1099 break; 1100 default: 1101 bad: 1102 db_printf("<bad instruction>"); 1103 break; 1104 } 1105 } 1106 1107 return (loc); 1108 } 1109 1110 /* 1111 * Disassemble instruction at 'loc'. 'altfmt' specifies an 1112 * (optional) alternate format. Return address of start of 1113 * next instruction. 1114 */ 1115 db_addr_t 1116 db_disasm(db_addr_t loc, bool altfmt) 1117 { 1118 int inst; 1119 int size; 1120 int short_addr; 1121 const char * seg; 1122 const struct inst * ip; 1123 const char * i_name; 1124 int i_size; 1125 int i_mode; 1126 int regmodrm = 0; 1127 bool first; 1128 int displ; 1129 int prefix; 1130 int imm; 1131 int imm2; 1132 int len; 1133 struct i_addr address; 1134 1135 get_value_inc(inst, loc, 1, false); 1136 short_addr = false; 1137 size = LONG; 1138 seg = 0; 1139 1140 /* 1141 * Get prefixes 1142 */ 1143 prefix = true; 1144 do { 1145 switch (inst) { 1146 case 0x66: /* data16 */ 1147 size = WORD; 1148 break; 1149 case 0x67: 1150 short_addr = true; 1151 break; 1152 case 0x26: 1153 seg = "%es"; 1154 break; 1155 case 0x36: 1156 seg = "%ss"; 1157 break; 1158 case 0x2e: 1159 seg = "%cs"; 1160 break; 1161 case 0x3e: 1162 seg = "%ds"; 1163 break; 1164 case 0x64: 1165 seg = "%fs"; 1166 break; 1167 case 0x65: 1168 seg = "%gs"; 1169 break; 1170 case 0xf0: 1171 db_printf("lock "); 1172 break; 1173 case 0xf2: 1174 db_printf("repne "); 1175 break; 1176 case 0xf3: 1177 db_printf("repe "); /* XXX repe VS rep */ 1178 break; 1179 default: 1180 prefix = false; 1181 break; 1182 } 1183 if (prefix) 1184 get_value_inc(inst, loc, 1, false); 1185 } while (prefix); 1186 1187 if (inst >= 0xd8 && inst <= 0xdf) { 1188 loc = db_disasm_esc(loc, inst, short_addr, size, seg); 1189 db_printf("\n"); 1190 return (loc); 1191 } 1192 1193 if (inst == 0x0f) { 1194 get_value_inc(inst, loc, 1, false); 1195 ip = db_inst_0f[inst>>4]; 1196 if (ip == 0) 1197 ip = &db_bad_inst; 1198 else 1199 ip = &ip[inst&0xf]; 1200 } else { 1201 ip = &db_inst_table[inst]; 1202 } 1203 1204 if (ip->i_has_modrm) { 1205 get_value_inc(regmodrm, loc, 1, false); 1206 loc = db_read_address(loc, short_addr, regmodrm, &address); 1207 } 1208 1209 i_name = ip->i_name; 1210 i_size = ip->i_size; 1211 i_mode = ip->i_mode; 1212 1213 if (i_size == RDEP) { 1214 /* sub-table to handle dependency on reg from ModR/M byte */ 1215 ip = (const struct inst *)ip->i_extra; 1216 ip = &ip[f_reg(regmodrm)]; 1217 i_name = ip->i_name; 1218 i_mode = ip->i_mode; 1219 i_size = ip->i_size; 1220 } else if (i_name == NULL) { 1221 i_name = ((const char *const*)ip->i_extra)[f_reg(regmodrm)]; 1222 } else if (ip->i_extra == (const char *)db_Grp3) { 1223 ip = (const struct inst *)ip->i_extra; 1224 ip = &ip[f_reg(regmodrm)]; 1225 i_name = ip->i_name; 1226 i_mode = ip->i_mode; 1227 } 1228 1229 /* ModR/M-specific operation? */ 1230 if ((i_mode & 0xFF) == MEx) { 1231 if (f_mod(regmodrm) != 3) 1232 i_mode = op1(E); 1233 else { 1234 /* unknown extension? */ 1235 if (f_rm(regmodrm) > (i_mode >> 8)) 1236 i_name = ""; 1237 else { 1238 /* skip to the specific op */ 1239 int i = f_rm(regmodrm); 1240 i_name = ip->i_extra; 1241 while (i-- > 0) 1242 while (*i_name++) 1243 ; 1244 } 1245 i_mode = 0; 1246 } 1247 } 1248 1249 if (i_size == SDEP) { 1250 if (size == WORD) 1251 db_printf("%s", i_name); 1252 else 1253 db_printf("%s", (const char *)ip->i_extra); 1254 } else { 1255 db_printf("%s", i_name); 1256 if (i_size != NONE) { 1257 if (i_size == BYTE) { 1258 db_printf("b"); 1259 size = BYTE; 1260 } else if (i_size == WORD) { 1261 db_printf("w"); 1262 size = WORD; 1263 } else if (size == WORD) { 1264 db_printf("w"); 1265 } else { 1266 db_printf("l"); 1267 } 1268 } 1269 } 1270 db_printf("\t"); 1271 for (first = true; 1272 i_mode != 0; 1273 i_mode >>= 8, first = false) { 1274 char tbuf[24]; 1275 1276 if (!first) 1277 db_printf(","); 1278 1279 switch (i_mode & 0xFF) { 1280 case E: 1281 db_print_address(seg, size, &address); 1282 break; 1283 case Eind: 1284 db_printf("*"); 1285 db_print_address(seg, size, &address); 1286 break; 1287 case El: 1288 db_print_address(seg, LONG, &address); 1289 break; 1290 case Ew: 1291 db_print_address(seg, WORD, &address); 1292 break; 1293 case Eb: 1294 db_print_address(seg, BYTE, &address); 1295 break; 1296 case R: 1297 db_printf("%s", db_reg[size][f_reg(regmodrm)]); 1298 break; 1299 case Rw: 1300 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); 1301 break; 1302 case Ri: 1303 db_printf("%s", db_reg[size][f_rm(inst)]); 1304 break; 1305 case Ril: 1306 db_printf("%s", db_reg[LONG][f_rm(inst)]); 1307 break; 1308 case S: 1309 db_printf("%s", db_seg_reg[f_reg(regmodrm)]); 1310 break; 1311 case Si: 1312 db_printf("%s", db_seg_reg[f_reg(inst)]); 1313 break; 1314 case A: 1315 db_printf("%s", db_reg[size][0]); /* acc */ 1316 break; 1317 case BX: 1318 if (seg) 1319 db_printf("%s:", seg); 1320 db_printf("(%s)", short_addr ? "%bx" : "%ebx"); 1321 break; 1322 case CL: 1323 db_printf("%%cl"); 1324 break; 1325 case DX: 1326 db_printf("%%dx"); 1327 break; 1328 case SI: 1329 if (seg) 1330 db_printf("%s:", seg); 1331 db_printf("(%s)", short_addr ? "%si" : "%esi"); 1332 break; 1333 case DI: 1334 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); 1335 break; 1336 case CR: 1337 db_printf("%%cr%d", f_reg(regmodrm)); 1338 break; 1339 case DR: 1340 db_printf("%%dr%d", f_reg(regmodrm)); 1341 break; 1342 case TR: 1343 db_printf("%%tr%d", f_reg(regmodrm)); 1344 break; 1345 case I: 1346 len = db_lengths[size]; 1347 get_value_inc(imm, loc, len, false);/* unsigned */ 1348 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1349 db_printf("$%s", tbuf); 1350 break; 1351 case Is: 1352 len = db_lengths[size]; 1353 get_value_inc(imm, loc, len, true); /* signed */ 1354 db_format_radix(tbuf, 24, imm, true); 1355 db_printf("$%s", tbuf); 1356 break; 1357 case Ib: 1358 get_value_inc(imm, loc, 1, false); /* unsigned */ 1359 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1360 db_printf("$%s", tbuf); 1361 break; 1362 case Iba: 1363 get_value_inc(imm, loc, 1, false); 1364 if (imm != 0x0a) { 1365 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1366 db_printf("$%s", tbuf); 1367 } 1368 break; 1369 case Ibs: 1370 get_value_inc(imm, loc, 1, true); /* signed */ 1371 db_format_radix(tbuf, 24, imm, true); 1372 db_printf("$%s", tbuf); 1373 break; 1374 case Iw: 1375 get_value_inc(imm, loc, 2, false); /* unsigned */ 1376 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1377 db_printf("$%s", tbuf); 1378 break; 1379 case Il: 1380 get_value_inc(imm, loc, 4, false); 1381 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1382 db_printf("$%s", tbuf); 1383 break; 1384 case O: 1385 if (short_addr) 1386 get_value_inc(displ, loc, 2, true); 1387 else 1388 get_value_inc(displ, loc, 4, true); 1389 if (seg) { 1390 db_format_radix(tbuf, 24, displ, true); 1391 db_printf("%s:%s", seg, tbuf); 1392 } else 1393 db_printsym((db_addr_t)displ, DB_STGY_ANY, 1394 db_printf); 1395 break; 1396 case Db: 1397 get_value_inc(displ, loc, 1, true); 1398 db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN, 1399 db_printf); 1400 break; 1401 case Dl: 1402 get_value_inc(displ, loc, 4, true); 1403 db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN, 1404 db_printf); 1405 break; 1406 case o1: 1407 db_printf("$1"); 1408 break; 1409 case o3: 1410 db_printf("$3"); 1411 break; 1412 case OS: 1413 get_value_inc(imm, loc, 4, false); /* offset */ 1414 db_format_radix(tbuf, 24, (unsigned int)imm, true); 1415 db_printf("$%s", tbuf); 1416 get_value_inc(imm2, loc, 2, false); /* segment */ 1417 db_format_radix(tbuf, 24, (unsigned int)imm2, true); 1418 db_printf(",%s", tbuf); 1419 break; 1420 } 1421 } 1422 1423 db_printf("\n"); 1424 return (loc); 1425 } 1426
Indexes created Sat Sep 20 22:09:52 GMT 2025