1 /*-
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31 * Instruction disassembler.
32 */
33 #include <sys/param.h>
34
35 #include <ddb/ddb.h>
36 #include <ddb/db_access.h>
37 #include <ddb/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 char * const db_Grp15[] = {
157 "fxsave",
158 "fxrstor",
159 "ldmxcsr",
160 "stmxcsr",
161 "",
162 "",
163 "",
164 "clflush"
165 };
166
167 static const char * const db_Grp15b[] = {
168 "",
169 "",
170 "",
171 "",
172 "",
173 "lfence",
174 "mfence",
175 "sfence"
176 };
177
178 static const struct inst db_inst_0f0x[] = {
179 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 },
180 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 },
181 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
182 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
183 /*04*/ { "", FALSE, NONE, 0, 0 },
184 /*05*/ { "syscall",FALSE,NONE, 0, 0 },
185 /*06*/ { "clts", FALSE, NONE, 0, 0 },
186 /*07*/ { "sysret",FALSE, NONE, 0, 0 },
187
188 /*08*/ { "invd", FALSE, NONE, 0, 0 },
189 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
190 /*0a*/ { "", FALSE, NONE, 0, 0 },
191 /*0b*/ { "", FALSE, NONE, 0, 0 },
192 /*0c*/ { "", FALSE, NONE, 0, 0 },
193 /*0d*/ { "", FALSE, NONE, 0, 0 },
194 /*0e*/ { "", FALSE, NONE, 0, 0 },
195 /*0f*/ { "", FALSE, NONE, 0, 0 },
196 };
197
198 static const struct inst db_inst_0f2x[] = {
199 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 },
200 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 },
201 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 },
202 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 },
203 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 },
204 /*25*/ { "", FALSE, NONE, 0, 0 },
205 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 },
206 /*27*/ { "", FALSE, NONE, 0, 0 },
207
208 /*28*/ { "", FALSE, NONE, 0, 0 },
209 /*29*/ { "", FALSE, NONE, 0, 0 },
210 /*2a*/ { "", FALSE, NONE, 0, 0 },
211 /*2b*/ { "", FALSE, NONE, 0, 0 },
212 /*2c*/ { "", FALSE, NONE, 0, 0 },
213 /*2d*/ { "", FALSE, NONE, 0, 0 },
214 /*2e*/ { "", FALSE, NONE, 0, 0 },
215 /*2f*/ { "", FALSE, NONE, 0, 0 },
216 };
217
218 static const struct inst db_inst_0f3x[] = {
219 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 },
220 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 },
221 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 },
222 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 },
223 /*34*/ { "sysenter",FALSE,NONE, 0, 0 },
224 /*35*/ { "sysexit",FALSE,NONE, 0, 0 },
225 /*36*/ { "", FALSE, NONE, 0, 0 },
226 /*37*/ { "getsec",FALSE, NONE, 0, 0 },
227
228 /*38*/ { "", FALSE, NONE, 0, 0 },
229 /*39*/ { "", FALSE, NONE, 0, 0 },
230 /*3a*/ { "", FALSE, NONE, 0, 0 },
231 /*3b*/ { "", FALSE, NONE, 0, 0 },
232 /*3c*/ { "", FALSE, NONE, 0, 0 },
233 /*3d*/ { "", FALSE, NONE, 0, 0 },
234 /*3e*/ { "", FALSE, NONE, 0, 0 },
235 /*3f*/ { "", FALSE, NONE, 0, 0 },
236 };
237
238 static const struct inst db_inst_0f4x[] = {
239 /*40*/ { "cmovo", TRUE, NONE, op2(E, R), 0 },
240 /*41*/ { "cmovno", TRUE, NONE, op2(E, R), 0 },
241 /*42*/ { "cmovb", TRUE, NONE, op2(E, R), 0 },
242 /*43*/ { "cmovnb", TRUE, NONE, op2(E, R), 0 },
243 /*44*/ { "cmovz", TRUE, NONE, op2(E, R), 0 },
244 /*45*/ { "cmovnz", TRUE, NONE, op2(E, R), 0 },
245 /*46*/ { "cmovbe", TRUE, NONE, op2(E, R), 0 },
246 /*47*/ { "cmovnbe",TRUE, NONE, op2(E, R), 0 },
247
248 /*48*/ { "cmovs", TRUE, NONE, op2(E, R), 0 },
249 /*49*/ { "cmovns", TRUE, NONE, op2(E, R), 0 },
250 /*4a*/ { "cmovp", TRUE, NONE, op2(E, R), 0 },
251 /*4b*/ { "cmovnp", TRUE, NONE, op2(E, R), 0 },
252 /*4c*/ { "cmovl", TRUE, NONE, op2(E, R), 0 },
253 /*4d*/ { "cmovnl", TRUE, NONE, op2(E, R), 0 },
254 /*4e*/ { "cmovle", TRUE, NONE, op2(E, R), 0 },
255 /*4f*/ { "cmovnle",TRUE, NONE, op2(E, R), 0 },
256 };
257
258 static const struct inst db_inst_0f8x[] = {
259 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
260 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
261 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
262 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
263 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
264 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
265 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
266 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
267
268 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
269 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
270 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
271 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
272 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
273 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
274 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
275 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
276 };
277
278 static const struct inst db_inst_0f9x[] = {
279 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
280 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
281 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
282 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
283 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
284 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
285 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
286 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
287
288 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
289 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
290 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
291 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
292 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
293 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
294 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
295 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
296 };
297
298 static const struct inst db_inst_0fax[] = {
299 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
300 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
301 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 },
302 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 },
303 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 },
304 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 },
305 /*a6*/ { "", FALSE, NONE, 0, 0 },
306 /*a7*/ { "", FALSE, NONE, 0, 0 },
307
308 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
309 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
310 /*aa*/ { "rsm", FALSE, NONE, 0, 0 },
311 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 },
312 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 },
313 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 },
314 /*ae*/ { "", TRUE, LONG, op1(E), db_Grp15 },
315 /*af*/ { "imul", TRUE, LONG, op2(E,R), 0 },
316 };
317
318 static const struct inst db_inst_0fbx[] = {
319 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
320 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
321 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
322 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 },
323 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
324 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
325 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 },
326 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 },
327
328 /*b8*/ { "", FALSE, NONE, 0, 0 },
329 /*b9*/ { "", FALSE, NONE, 0, 0 },
330 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 },
331 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
332 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
333 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
334 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 },
335 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 },
336 };
337
338 static const struct inst db_inst_0fcx[] = {
339 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
340 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
341 /*c2*/ { "", FALSE, NONE, 0, 0 },
342 /*c3*/ { "", FALSE, NONE, 0, 0 },
343 /*c4*/ { "", FALSE, NONE, 0, 0 },
344 /*c5*/ { "", FALSE, NONE, 0, 0 },
345 /*c6*/ { "", FALSE, NONE, 0, 0 },
346 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 },
347 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
348 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
349 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
350 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
351 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
352 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
353 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
354 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
355 };
356
357 static const struct inst * const db_inst_0f[] = {
358 db_inst_0f0x,
359 0,
360 db_inst_0f2x,
361 db_inst_0f3x,
362 db_inst_0f4x,
363 0,
364 0,
365 0,
366 db_inst_0f8x,
367 db_inst_0f9x,
368 db_inst_0fax,
369 db_inst_0fbx,
370 db_inst_0fcx,
371 0,
372 0,
373 0
374 };
375
376 static const char * const db_Esc92[] = {
377 "fnop", "", "", "", "", "", "", ""
378 };
379 static const char * const db_Esc94[] = {
380 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
381 };
382 static const char * const db_Esc95[] = {
383 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
384 };
385 static const char * const db_Esc96[] = {
386 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
387 "fincstp"
388 };
389 static const char * const db_Esc97[] = {
390 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
391 };
392
393 static const char * const db_Esca5[] = {
394 "", "fucompp","", "", "", "", "", ""
395 };
396
397 static const char * const db_Escb4[] = {
398 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
399 };
400
401 static const char * const db_Esce3[] = {
402 "", "fcompp","", "", "", "", "", ""
403 };
404
405 static const char * const db_Escf4[] = {
406 "fnstsw","", "", "", "", "", "", ""
407 };
408
409 static const struct finst db_Esc8[] = {
410 /**/ { "fadd", SNGL, op2(STI,ST), 0 },
411 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
412 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
413 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
414 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
415 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
416 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
417 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
418 };
419
420 static const struct finst db_Esc9[] = {
421 /**/ { "fld", SNGL, op1(STI), 0 },
422 /*1*/ { "", NONE, op1(STI), "fxch" },
423 /*2*/ { "fst", SNGL, op1(X), db_Esc92 },
424 /*3*/ { "fstp", SNGL, 0, 0 },
425 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
426 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
427 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
428 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
429 };
430
431 static const struct finst db_Esca[] = {
432 /**/ { "fiadd", LONG, 0, 0 },
433 /*1*/ { "fimul", LONG, 0, 0 },
434 /*2*/ { "ficom", LONG, 0, 0 },
435 /*3*/ { "ficomp", LONG, 0, 0 },
436 /*4*/ { "fisub", LONG, 0, 0 },
437 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
438 /*6*/ { "fidiv", LONG, 0, 0 },
439 /*7*/ { "fidivr", LONG, 0, 0 }
440 };
441
442 static const struct finst db_Escb[] = {
443 /**/ { "fild", LONG, 0, 0 },
444 /*1*/ { "", NONE, 0, 0 },
445 /*2*/ { "fist", LONG, 0, 0 },
446 /*3*/ { "fistp", LONG, 0, 0 },
447 /*4*/ { "", WORD, op1(X), db_Escb4 },
448 /*5*/ { "fld", EXTR, 0, 0 },
449 /*6*/ { "", WORD, 0, 0 },
450 /*7*/ { "fstp", EXTR, 0, 0 },
451 };
452
453 static const struct finst db_Escc[] = {
454 /**/ { "fadd", DBLR, op2(ST,STI), 0 },
455 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
456 /*2*/ { "fcom", DBLR, 0, 0 },
457 /*3*/ { "fcomp", DBLR, 0, 0 },
458 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
459 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
460 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
461 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
462 };
463
464 static const struct finst db_Escd[] = {
465 /**/ { "fld", DBLR, op1(STI), "ffree" },
466 /*1*/ { "", NONE, 0, 0 },
467 /*2*/ { "fst", DBLR, op1(STI), 0 },
468 /*3*/ { "fstp", DBLR, op1(STI), 0 },
469 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
470 /*5*/ { "", NONE, op1(STI), "fucomp" },
471 /*6*/ { "fnsave", NONE, 0, 0 },
472 /*7*/ { "fnstsw", NONE, 0, 0 },
473 };
474
475 static const struct finst db_Esce[] = {
476 /**/ { "fiadd", WORD, op2(ST,STI), "faddp" },
477 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
478 /*2*/ { "ficom", WORD, 0, 0 },
479 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
480 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
481 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
482 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
483 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
484 };
485
486 static const struct finst db_Escf[] = {
487 /**/ { "fild", WORD, 0, 0 },
488 /*1*/ { "", NONE, 0, 0 },
489 /*2*/ { "fist", WORD, 0, 0 },
490 /*3*/ { "fistp", WORD, 0, 0 },
491 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
492 /*5*/ { "fild", QUAD, 0, 0 },
493 /*6*/ { "fbstp", NONE, 0, 0 },
494 /*7*/ { "fistp", QUAD, 0, 0 },
495 };
496
497 static const struct finst * const db_Esc_inst[] = {
498 db_Esc8, db_Esc9, db_Esca, db_Escb,
499 db_Escc, db_Escd, db_Esce, db_Escf
500 };
501
502 static const char * const db_Grp1[] = {
503 "add",
504 "or",
505 "adc",
506 "sbb",
507 "and",
508 "sub",
509 "xor",
510 "cmp"
511 };
512
513 static const char * const db_Grp2[] = {
514 "rol",
515 "ror",
516 "rcl",
517 "rcr",
518 "shl",
519 "shr",
520 "shl",
521 "sar"
522 };
523
524 static const struct inst db_Grp3[] = {
525 { "test", TRUE, NONE, op2(I,E), 0 },
526 { "test", TRUE, NONE, op2(I,E), 0 },
527 { "not", TRUE, NONE, op1(E), 0 },
528 { "neg", TRUE, NONE, op1(E), 0 },
529 { "mul", TRUE, NONE, op2(E,A), 0 },
530 { "imul", TRUE, NONE, op2(E,A), 0 },
531 { "div", TRUE, NONE, op2(E,A), 0 },
532 { "idiv", TRUE, NONE, op2(E,A), 0 },
533 };
534
535 static const struct inst db_Grp4[] = {
536 { "inc", TRUE, BYTE, op1(E), 0 },
537 { "dec", TRUE, BYTE, op1(E), 0 },
538 { "", TRUE, NONE, 0, 0 },
539 { "", TRUE, NONE, 0, 0 },
540 { "", TRUE, NONE, 0, 0 },
541 { "", TRUE, NONE, 0, 0 },
542 { "", TRUE, NONE, 0, 0 },
543 { "", TRUE, NONE, 0, 0 }
544 };
545
546 static const struct inst db_Grp5[] = {
547 { "inc", TRUE, LONG, op1(E), 0 },
548 { "dec", TRUE, LONG, op1(E), 0 },
549 { "call", TRUE, LONG, op1(Eind),0 },
550 { "lcall", TRUE, LONG, op1(Eind),0 },
551 { "jmp", TRUE, LONG, op1(Eind),0 },
552 { "ljmp", TRUE, LONG, op1(Eind),0 },
553 { "push", TRUE, LONG, op1(E), 0 },
554 { "", TRUE, NONE, 0, 0 }
555 };
556
557 static const struct inst db_inst_table[256] = {
558 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
559 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
560 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
561 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
562 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 },
563 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
564 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
565 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
566
567 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
568 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
569 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
570 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
571 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
572 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
573 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
574 /*0f*/ { "", FALSE, NONE, 0, 0 },
575
576 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
577 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
578 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
579 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
580 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 },
581 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
582 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
583 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
584
585 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
586 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
587 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
588 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
589 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 },
590 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
591 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
592 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
593
594 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
595 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
596 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
597 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
598 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
599 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
600 /*26*/ { "", FALSE, NONE, 0, 0 },
601 /*27*/ { "daa", FALSE, NONE, 0, 0 },
602
603 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
604 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
605 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
606 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
607 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 },
608 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
609 /*2e*/ { "", FALSE, NONE, 0, 0 },
610 /*2f*/ { "das", FALSE, NONE, 0, 0 },
611
612 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
613 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
614 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
615 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
616 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
617 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
618 /*36*/ { "", FALSE, NONE, 0, 0 },
619 /*37*/ { "aaa", FALSE, NONE, 0, 0 },
620
621 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
622 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
623 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
624 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
625 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 },
626 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
627 /*3e*/ { "", FALSE, NONE, 0, 0 },
628 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
629
630 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
631 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
632 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
633 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
634 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
635 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
636 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
637 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
638
639 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
640 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
641 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
642 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
643 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
644 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
645 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
646 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
647
648 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
649 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
650 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
651 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
652 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
653 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
654 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
655 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
656
657 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
658 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
659 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
660 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
661 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
662 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
663 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
664 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
665
666 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
667 /*61*/ { "popa", FALSE, LONG, 0, 0 },
668 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
669 /*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 },
670
671 /*64*/ { "", FALSE, NONE, 0, 0 },
672 /*65*/ { "", FALSE, NONE, 0, 0 },
673 /*66*/ { "", FALSE, NONE, 0, 0 },
674 /*67*/ { "", FALSE, NONE, 0, 0 },
675
676 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
677 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
678 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 },
679 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
680 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
681 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
682 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
683 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
684
685 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
686 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
687 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
688 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
689 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
690 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
691 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
692 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
693
694 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
695 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
696 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
697 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
698 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
699 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
700 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
701 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
702
703 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
704 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 },
705 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
706 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 },
707 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
708 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
709 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
710 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
711
712 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
713 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
714 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
715 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
716 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
717 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
718 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
719 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
720
721 /*90*/ { "nop", FALSE, NONE, 0, 0 },
722 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
723 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
724 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
725 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
726 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
727 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
728 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
729
730 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
731 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
732 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
733 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
734 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
735 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
736 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
737 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
738
739 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
740 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
741 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
742 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
743 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
744 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
745 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
746 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
747
748 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
749 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
750 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
751 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
752 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
753 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
754 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
755 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
756
757 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
758 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
759 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
760 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
761 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
762 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
763 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
764 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
765
766 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
767 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
768 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
769 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
770 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
771 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
772 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
773 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
774
775 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 },
776 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 },
777 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
778 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
779 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
780 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
781 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
782 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
783
784 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 },
785 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
786 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
787 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
788 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
789 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
790 /*ce*/ { "into", FALSE, NONE, 0, 0 },
791 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
792
793 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 },
794 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 },
795 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 },
796 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 },
797 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 },
798 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 },
799 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 },
800 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
801
802 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 },
803 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 },
804 /*da*/ { "", TRUE, NONE, 0, db_Esca },
805 /*db*/ { "", TRUE, NONE, 0, db_Escb },
806 /*dc*/ { "", TRUE, NONE, 0, db_Escc },
807 /*dd*/ { "", TRUE, NONE, 0, db_Escd },
808 /*de*/ { "", TRUE, NONE, 0, db_Esce },
809 /*df*/ { "", TRUE, NONE, 0, db_Escf },
810
811 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
812 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
813 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
814 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
815 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
816 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
817 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
818 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
819
820 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
821 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
822 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
823 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
824 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
825 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
826 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
827 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
828
829 /*f0*/ { "", FALSE, NONE, 0, 0 },
830 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 },
831 /*f2*/ { "", FALSE, NONE, 0, 0 },
832 /*f3*/ { "", FALSE, NONE, 0, 0 },
833 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
834 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
835 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 },
836 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 },
837
838 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
839 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
840 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
841 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
842 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
843 /*fd*/ { "std", FALSE, NONE, 0, 0 },
844 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 },
845 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 },
846 };
847
848 static const struct inst db_bad_inst =
849 { "???", FALSE, NONE, 0, 0 }
850 ;
851
852 #define f_mod(byte) ((byte)>>6)
853 #define f_reg(byte) (((byte)>>3)&0x7)
854 #define f_rm(byte) ((byte)&0x7)
855
856 #define sib_ss(byte) ((byte)>>6)
857 #define sib_index(byte) (((byte)>>3)&0x7)
858 #define sib_base(byte) ((byte)&0x7)
859
860 struct i_addr {
861 int is_reg; /* if reg, reg number is in 'disp' */
862 int disp;
863 const char * base;
864 const char * index;
865 int ss;
866 };
867
868 static const char * const db_index_reg_16[8] = {
869 "%bx,%si",
870 "%bx,%di",
871 "%bp,%si",
872 "%bp,%di",
873 "%si",
874 "%di",
875 "%bp",
876 "%bx"
877 };
878
879 static const char * const db_reg[3][8] = {
880 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" },
881 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" },
882 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
883 };
884
885 static const char * const db_seg_reg[8] = {
886 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
887 };
888
889 /*
890 * lengths for size attributes
891 */
892 static const int db_lengths[] = {
893 1, /* BYTE */
894 2, /* WORD */
895 4, /* LONG */
896 8, /* QUAD */
897 4, /* SNGL */
898 8, /* DBLR */
899 10, /* EXTR */
900 };
901
902 #define get_value_inc(result, loc, size, is_signed) \
903 result = db_get_value((loc), (size), (is_signed)); \
904 (loc) += (size);
905
906 static db_addr_t
907 db_disasm_esc(db_addr_t loc, int inst, int short_addr,
908 int size, const char *seg);
909 static void db_print_address(const char *seg, int size,
910 struct i_addr *addrp);
911 static db_addr_t
912 db_read_address(db_addr_t loc, int short_addr, int regmodrm,
913 struct i_addr *addrp);
914
915 /*
916 * Read address at location and return updated location.
917 */
918 static db_addr_t
919 db_read_address(loc, short_addr, regmodrm, addrp)
920 db_addr_t loc;
921 int short_addr;
922 int regmodrm;
923 struct i_addr * addrp; /* out */
924 {
925 int mod, rm, sib, index, disp;
926
927 mod = f_mod(regmodrm);
928 rm = f_rm(regmodrm);
929
930 if (mod == 3) {
931 addrp->is_reg = TRUE;
932 addrp->disp = rm;
933 return (loc);
934 }
935 addrp->is_reg = FALSE;
936 addrp->index = 0;
937
938 if (short_addr) {
939 addrp->index = 0;
940 addrp->ss = 0;
941 switch (mod) {
942 case 0:
943 if (rm == 6) {
944 get_value_inc(disp, loc, 2, FALSE);
945 addrp->disp = disp;
946 addrp->base = 0;
947 }
948 else {
949 addrp->disp = 0;
950 addrp->base = db_index_reg_16[rm];
951 }
952 break;
953 case 1:
954 get_value_inc(disp, loc, 1, TRUE);
955 disp &= 0xFFFF;
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 }
966 else {
967 if (mod != 3 && rm == 4) {
968 get_value_inc(sib, loc, 1, FALSE);
969 rm = sib_base(sib);
970 index = sib_index(sib);
971 if (index != 4)
972 addrp->index = db_reg[LONG][index];
973 addrp->ss = sib_ss(sib);
974 }
975
976 switch (mod) {
977 case 0:
978 if (rm == 5) {
979 get_value_inc(addrp->disp, loc, 4, FALSE);
980 addrp->base = 0;
981 }
982 else {
983 addrp->disp = 0;
984 addrp->base = db_reg[LONG][rm];
985 }
986 break;
987
988 case 1:
989 get_value_inc(disp, loc, 1, TRUE);
990 addrp->disp = disp;
991 addrp->base = db_reg[LONG][rm];
992 break;
993
994 case 2:
995 get_value_inc(disp, loc, 4, FALSE);
996 addrp->disp = disp;
997 addrp->base = db_reg[LONG][rm];
998 break;
999 }
1000 }
1001 return (loc);
1002 }
1003
1004 static void
1005 db_print_address(seg, size, addrp)
1006 const char * seg;
1007 int size;
1008 struct i_addr * addrp;
1009 {
1010 if (addrp->is_reg) {
1011 db_printf("%s", db_reg[size][addrp->disp]);
1012 return;
1013 }
1014
1015 if (seg) {
1016 db_printf("%s:", seg);
1017 }
1018
1019 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
1020 if (addrp->base != 0 || addrp->index != 0) {
1021 db_printf("(");
1022 if (addrp->base)
1023 db_printf("%s", addrp->base);
1024 if (addrp->index)
1025 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
1026 db_printf(")");
1027 }
1028 }
1029
1030 /*
1031 * Disassemble floating-point ("escape") instruction
1032 * and return updated location.
1033 */
1034 static db_addr_t
1035 db_disasm_esc(loc, inst, short_addr, size, seg)
1036 db_addr_t loc;
1037 int inst;
1038 int short_addr;
1039 int size;
1040 const char * seg;
1041 {
1042 int regmodrm;
1043 const struct finst * fp;
1044 int mod;
1045 struct i_addr address;
1046 const char * name;
1047
1048 get_value_inc(regmodrm, loc, 1, FALSE);
1049 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1050 mod = f_mod(regmodrm);
1051 if (mod != 3) {
1052 if (*fp->f_name == '\0') {
1053 db_printf("<bad instruction>");
1054 return (loc);
1055 }
1056 /*
1057 * Normal address modes.
1058 */
1059 loc = db_read_address(loc, short_addr, regmodrm, &address);
1060 db_printf("%s", fp->f_name);
1061 switch(fp->f_size) {
1062 case SNGL:
1063 db_printf("s");
1064 break;
1065 case DBLR:
1066 db_printf("l");
1067 break;
1068 case EXTR:
1069 db_printf("t");
1070 break;
1071 case WORD:
1072 db_printf("s");
1073 break;
1074 case LONG:
1075 db_printf("l");
1076 break;
1077 case QUAD:
1078 db_printf("q");
1079 break;
1080 default:
1081 break;
1082 }
1083 db_printf("\t");
1084 db_print_address(seg, BYTE, &address);
1085 }
1086 else {
1087 /*
1088 * 'reg-reg' - special formats
1089 */
1090 switch (fp->f_rrmode) {
1091 case op2(ST,STI):
1092 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1093 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1094 break;
1095 case op2(STI,ST):
1096 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1097 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1098 break;
1099 case op1(STI):
1100 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1101 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
1102 break;
1103 case op1(X):
1104 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1105 if (*name == '\0')
1106 goto bad;
1107 db_printf("%s", name);
1108 break;
1109 case op1(XA):
1110 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1111 if (*name == '\0')
1112 goto bad;
1113 db_printf("%s\t%%ax", name);
1114 break;
1115 default:
1116 bad:
1117 db_printf("<bad instruction>");
1118 break;
1119 }
1120 }
1121
1122 return (loc);
1123 }
1124
1125 /*
1126 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1127 * (optional) alternate format. Return address of start of
1128 * next instruction.
1129 */
1130 db_addr_t
1131 db_disasm(loc, altfmt)
1132 db_addr_t loc;
1133 boolean_t altfmt;
1134 {
1135 int inst;
1136 int size;
1137 int short_addr;
1138 const char * seg;
1139 const struct inst * ip;
1140 const char * i_name;
1141 int i_size;
1142 int i_mode;
1143 int regmodrm = 0;
1144 boolean_t first;
1145 int displ;
1146 int prefix;
1147 int rep;
1148 int imm;
1149 int imm2;
1150 int len;
1151 struct i_addr address;
1152
1153 get_value_inc(inst, loc, 1, FALSE);
1154 short_addr = FALSE;
1155 size = LONG;
1156 seg = 0;
1157
1158 /*
1159 * Get prefixes
1160 */
1161 rep = FALSE;
1162 prefix = TRUE;
1163 do {
1164 switch (inst) {
1165 case 0x66: /* data16 */
1166 size = WORD;
1167 break;
1168 case 0x67:
1169 short_addr = TRUE;
1170 break;
1171 case 0x26:
1172 seg = "%es";
1173 break;
1174 case 0x36:
1175 seg = "%ss";
1176 break;
1177 case 0x2e:
1178 seg = "%cs";
1179 break;
1180 case 0x3e:
1181 seg = "%ds";
1182 break;
1183 case 0x64:
1184 seg = "%fs";
1185 break;
1186 case 0x65:
1187 seg = "%gs";
1188 break;
1189 case 0xf0:
1190 db_printf("lock ");
1191 break;
1192 case 0xf2:
1193 db_printf("repne ");
1194 break;
1195 case 0xf3:
1196 rep = TRUE;
1197 break;
1198 default:
1199 prefix = FALSE;
1200 break;
1201 }
1202 if (prefix) {
1203 get_value_inc(inst, loc, 1, FALSE);
1204 }
1205 if (rep == TRUE) {
1206 if (inst == 0x90) {
1207 db_printf("pause\n");
1208 return (loc);
1209 }
1210 db_printf("repe "); /* XXX repe VS rep */
1211 rep = FALSE;
1212 }
1213 } while (prefix);
1214
1215 if (inst >= 0xd8 && inst <= 0xdf) {
1216 loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1217 db_printf("\n");
1218 return (loc);
1219 }
1220
1221 if (inst == 0x0f) {
1222 get_value_inc(inst, loc, 1, FALSE);
1223 ip = db_inst_0f[inst>>4];
1224 if (ip == 0) {
1225 ip = &db_bad_inst;
1226 }
1227 else {
1228 ip = &ip[inst&0xf];
1229 }
1230 }
1231 else
1232 ip = &db_inst_table[inst];
1233
1234 if (ip->i_has_modrm) {
1235 get_value_inc(regmodrm, loc, 1, FALSE);
1236 loc = db_read_address(loc, short_addr, regmodrm, &address);
1237 }
1238
1239 i_name = ip->i_name;
1240 i_size = ip->i_size;
1241 i_mode = ip->i_mode;
1242
1243 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1244 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1245 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 ||
1246 ip->i_extra == db_Grp15) {
1247 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1248 }
1249 else if (ip->i_extra == db_Grp3) {
1250 ip = ip->i_extra;
1251 ip = &ip[f_reg(regmodrm)];
1252 i_name = ip->i_name;
1253 i_mode = ip->i_mode;
1254 }
1255 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1256 ip = ip->i_extra;
1257 ip = &ip[f_reg(regmodrm)];
1258 i_name = ip->i_name;
1259 i_mode = ip->i_mode;
1260 i_size = ip->i_size;
1261 }
1262
1263 /* Special cases that don't fit well in the tables. */
1264 if (ip->i_extra == db_Grp7 && f_mod(regmodrm) == 3) {
1265 switch (regmodrm) {
1266 case 0xc8:
1267 i_name = "monitor";
1268 i_size = NONE;
1269 i_mode = 0;
1270 break;
1271 case 0xc9:
1272 i_name = "mwait";
1273 i_size = NONE;
1274 i_mode = 0;
1275 break;
1276 }
1277 }
1278 if (ip->i_extra == db_Grp15 && f_mod(regmodrm) == 3) {
1279 i_name = db_Grp15b[f_reg(regmodrm)];
1280 i_size = NONE;
1281 i_mode = 0;
1282 }
1283
1284 if (i_size == SDEP) {
1285 if (size == WORD)
1286 db_printf("%s", i_name);
1287 else
1288 db_printf("%s", (const char *)ip->i_extra);
1289 }
1290 else {
1291 db_printf("%s", i_name);
1292 if (i_size != NONE) {
1293 if (i_size == BYTE) {
1294 db_printf("b");
1295 size = BYTE;
1296 }
1297 else if (i_size == WORD) {
1298 db_printf("w");
1299 size = WORD;
1300 }
1301 else if (size == WORD)
1302 db_printf("w");
1303 else
1304 db_printf("l");
1305 }
1306 }
1307 db_printf("\t");
1308 for (first = TRUE;
1309 i_mode != 0;
1310 i_mode >>= 8, first = FALSE)
1311 {
1312 if (!first)
1313 db_printf(",");
1314
1315 switch (i_mode & 0xFF) {
1316
1317 case E:
1318 db_print_address(seg, size, &address);
1319 break;
1320
1321 case Eind:
1322 db_printf("*");
1323 db_print_address(seg, size, &address);
1324 break;
1325
1326 case El:
1327 db_print_address(seg, LONG, &address);
1328 break;
1329
1330 case Ew:
1331 db_print_address(seg, WORD, &address);
1332 break;
1333
1334 case Eb:
1335 db_print_address(seg, BYTE, &address);
1336 break;
1337
1338 case R:
1339 db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1340 break;
1341
1342 case Rw:
1343 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1344 break;
1345
1346 case Ri:
1347 db_printf("%s", db_reg[size][f_rm(inst)]);
1348 break;
1349
1350 case Ril:
1351 db_printf("%s", db_reg[LONG][f_rm(inst)]);
1352 break;
1353
1354 case S:
1355 db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1356 break;
1357
1358 case Si:
1359 db_printf("%s", db_seg_reg[f_reg(inst)]);
1360 break;
1361
1362 case A:
1363 db_printf("%s", db_reg[size][0]); /* acc */
1364 break;
1365
1366 case BX:
1367 if (seg)
1368 db_printf("%s:", seg);
1369 db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1370 break;
1371
1372 case CL:
1373 db_printf("%%cl");
1374 break;
1375
1376 case DX:
1377 db_printf("%%dx");
1378 break;
1379
1380 case SI:
1381 if (seg)
1382 db_printf("%s:", seg);
1383 db_printf("(%s)", short_addr ? "%si" : "%esi");
1384 break;
1385
1386 case DI:
1387 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
1388 break;
1389
1390 case CR:
1391 db_printf("%%cr%d", f_reg(regmodrm));
1392 break;
1393
1394 case DR:
1395 db_printf("%%dr%d", f_reg(regmodrm));
1396 break;
1397
1398 case TR:
1399 db_printf("%%tr%d", f_reg(regmodrm));
1400 break;
1401
1402 case I:
1403 len = db_lengths[size];
1404 get_value_inc(imm, loc, len, FALSE);
1405 db_printf("$%#r", imm);
1406 break;
1407
1408 case Is:
1409 len = db_lengths[size];
1410 get_value_inc(imm, loc, len, FALSE);
1411 db_printf("$%+#r", imm);
1412 break;
1413
1414 case Ib:
1415 get_value_inc(imm, loc, 1, FALSE);
1416 db_printf("$%#r", imm);
1417 break;
1418
1419 case Iba:
1420 get_value_inc(imm, loc, 1, FALSE);
1421 if (imm != 0x0a)
1422 db_printf("$%#r", imm);
1423 break;
1424
1425 case Ibs:
1426 get_value_inc(imm, loc, 1, TRUE);
1427 if (size == WORD)
1428 imm &= 0xFFFF;
1429 db_printf("$%+#r", imm);
1430 break;
1431
1432 case Iw:
1433 get_value_inc(imm, loc, 2, FALSE);
1434 db_printf("$%#r", imm);
1435 break;
1436
1437 case O:
1438 len = (short_addr ? 2 : 4);
1439 get_value_inc(displ, loc, len, FALSE);
1440 if (seg)
1441 db_printf("%s:%+#r",seg, displ);
1442 else
1443 db_printsym((db_addr_t)displ, DB_STGY_ANY);
1444 break;
1445
1446 case Db:
1447 get_value_inc(displ, loc, 1, TRUE);
1448 displ += loc;
1449 if (size == WORD)
1450 displ &= 0xFFFF;
1451 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1452 break;
1453
1454 case Dl:
1455 len = db_lengths[size];
1456 get_value_inc(displ, loc, len, FALSE);
1457 displ += loc;
1458 if (size == WORD)
1459 displ &= 0xFFFF;
1460 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1461 break;
1462
1463 case o1:
1464 db_printf("$1");
1465 break;
1466
1467 case o3:
1468 db_printf("$3");
1469 break;
1470
1471 case OS:
1472 len = db_lengths[size];
1473 get_value_inc(imm, loc, len, FALSE); /* offset */
1474 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1475 db_printf("$%#r,%#r", imm2, imm);
1476 break;
1477 }
1478 }
1479 db_printf("\n");
1480 return (loc);
1481 }
Cache object: 907d29a522d4d22e9647c51d4b7d5012
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