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 /*
29 * Instruction disassembler.
30 */
31 #include <sys/param.h>
32 #include <sys/libkern.h>
33
34 #include <ddb/ddb.h>
35 #include <ddb/db_access.h>
36 #include <ddb/db_sym.h>
37
38 /*
39 * Size attributes
40 */
41 #define BYTE 0
42 #define WORD 1
43 #define LONG 2
44 #define QUAD 3
45 #define SNGL 4
46 #define DBLR 5
47 #define EXTR 6
48 #define SDEP 7
49 #define ADEP 8
50 #define ESC 9
51 #define NONE 10
52
53 /*
54 * REX prefix and bits
55 */
56 #define REX_B 1
57 #define REX_X 2
58 #define REX_R 4
59 #define REX_W 8
60 #define REX 0x40
61
62 /*
63 * Addressing modes
64 */
65 #define E 1 /* general effective address */
66 #define Eind 2 /* indirect address (jump, call) */
67 #define Ew 3 /* address, word size */
68 #define Eb 4 /* address, byte size */
69 #define R 5 /* register, in 'reg' field */
70 #define Rw 6 /* word register, in 'reg' field */
71 #define Rq 39 /* quad register, in 'reg' field */
72 #define Rv 40 /* register in 'r/m' field */
73 #define Ri 7 /* register in instruction */
74 #define S 8 /* segment reg, in 'reg' field */
75 #define Si 9 /* segment reg, in instruction */
76 #define A 10 /* accumulator */
77 #define BX 11 /* (bx) */
78 #define CL 12 /* cl, for shifts */
79 #define DX 13 /* dx, for IO */
80 #define SI 14 /* si */
81 #define DI 15 /* di */
82 #define CR 16 /* control register */
83 #define DR 17 /* debug register */
84 #define TR 18 /* test register */
85 #define I 19 /* immediate, unsigned */
86 #define Is 20 /* immediate, signed */
87 #define Ib 21 /* byte immediate, unsigned */
88 #define Ibs 22 /* byte immediate, signed */
89 #define Iw 23 /* word immediate, unsigned */
90 #define Ilq 24 /* long/quad immediate, unsigned */
91 #define O 25 /* direct address */
92 #define Db 26 /* byte displacement from EIP */
93 #define Dl 27 /* long displacement from EIP */
94 #define o1 28 /* constant 1 */
95 #define o3 29 /* constant 3 */
96 #define OS 30 /* immediate offset/segment */
97 #define ST 31 /* FP stack top */
98 #define STI 32 /* FP stack */
99 #define X 33 /* extended FP op */
100 #define XA 34 /* for 'fstcw %ax' */
101 #define El 35 /* address, long/quad size */
102 #define Ril 36 /* long register in instruction */
103 #define Iba 37 /* byte immediate, don't print if 0xa */
104 #define EL 38 /* address, explicitly long size */
105
106 struct inst {
107 const char * i_name; /* name */
108 bool i_has_modrm; /* has regmodrm byte */
109 short i_size; /* operand size */
110 int i_mode; /* addressing modes */
111 const void * i_extra; /* pointer to extra opcode table */
112 };
113
114 #define op1(x) (x)
115 #define op2(x,y) ((x)|((y)<<8))
116 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
117
118 struct finst {
119 const char * f_name; /* name for memory instruction */
120 int f_size; /* size for memory instruction */
121 int f_rrmode; /* mode for rr instruction */
122 const void * f_rrname; /* name for rr instruction
123 (or pointer to table) */
124 };
125
126 static const struct inst db_inst_0f388x[] = {
127 /*80*/ { "", true, SDEP, op2(E, Rq), "invept" },
128 /*81*/ { "", true, SDEP, op2(E, Rq), "invvpid" },
129 /*82*/ { "", true, SDEP, op2(E, Rq), "invpcid" },
130 /*83*/ { "", false, NONE, 0, 0 },
131 /*84*/ { "", false, NONE, 0, 0 },
132 /*85*/ { "", false, NONE, 0, 0 },
133 /*86*/ { "", false, NONE, 0, 0 },
134 /*87*/ { "", false, NONE, 0, 0 },
135
136 /*88*/ { "", false, NONE, 0, 0 },
137 /*89*/ { "", false, NONE, 0, 0 },
138 /*8a*/ { "", false, NONE, 0, 0 },
139 /*8b*/ { "", false, NONE, 0, 0 },
140 /*8c*/ { "", false, NONE, 0, 0 },
141 /*8d*/ { "", false, NONE, 0, 0 },
142 /*8e*/ { "", false, NONE, 0, 0 },
143 /*8f*/ { "", false, NONE, 0, 0 },
144 };
145
146 static const struct inst db_inst_0f38fx[] = {
147 /*f0*/ { "crc32b",true, NONE, op2(Eb, R), 0 },
148 /*f1*/ { "crc32", true, LONG, op2(E, R), 0 },
149 /*f2*/ { "", false, NONE, 0, 0 },
150 /*f3*/ { "", false, NONE, 0, 0 },
151 /*f4*/ { "", false, NONE, 0, 0 },
152 /*f5*/ { "", false, NONE, 0, 0 },
153 /*f6*/ { "", false, NONE, 0, 0 },
154 /*f7*/ { "", false, NONE, 0, 0 },
155
156 /*f8*/ { "", false, NONE, 0, 0 },
157 /*f9*/ { "", false, NONE, 0, 0 },
158 /*fa*/ { "", false, NONE, 0, 0 },
159 /*fb*/ { "", false, NONE, 0, 0 },
160 /*fc*/ { "", false, NONE, 0, 0 },
161 /*fd*/ { "", false, NONE, 0, 0 },
162 /*fe*/ { "", false, NONE, 0, 0 },
163 /*ff*/ { "", false, NONE, 0, 0 },
164 };
165
166 static const struct inst * const db_inst_0f38[] = {
167 0,
168 0,
169 0,
170 0,
171 0,
172 0,
173 0,
174 0,
175 db_inst_0f388x,
176 0,
177 0,
178 0,
179 0,
180 0,
181 0,
182 db_inst_0f38fx
183 };
184
185 static const char * const db_Grp6[] = {
186 "sldt",
187 "str",
188 "lldt",
189 "ltr",
190 "verr",
191 "verw",
192 "",
193 ""
194 };
195
196 static const char * const db_Grp7[] = {
197 "sgdt",
198 "sidt",
199 "lgdt",
200 "lidt",
201 "smsw",
202 "",
203 "lmsw",
204 "invlpg"
205 };
206
207 static const char * const db_Grp8[] = {
208 "",
209 "",
210 "",
211 "",
212 "bt",
213 "bts",
214 "btr",
215 "btc"
216 };
217
218 static const char * const db_Grp9[] = {
219 "",
220 "cmpxchg8b",
221 "",
222 "",
223 "",
224 "",
225 "vmptrld",
226 "vmptrst"
227 };
228
229 static const char * const db_Grp15[] = {
230 "fxsave",
231 "fxrstor",
232 "ldmxcsr",
233 "stmxcsr",
234 "xsave",
235 "xrstor",
236 "xsaveopt",
237 "clflush"
238 };
239
240 static const char * const db_Grp15b[] = {
241 "",
242 "",
243 "",
244 "",
245 "",
246 "lfence",
247 "mfence",
248 "sfence"
249 };
250
251 static const struct inst db_inst_0f0x[] = {
252 /*00*/ { "", true, NONE, op1(Ew), db_Grp6 },
253 /*01*/ { "", true, NONE, op1(Ew), db_Grp7 },
254 /*02*/ { "lar", true, LONG, op2(E,R), 0 },
255 /*03*/ { "lsl", true, LONG, op2(E,R), 0 },
256 /*04*/ { "", false, NONE, 0, 0 },
257 /*05*/ { "syscall",false,NONE, 0, 0 },
258 /*06*/ { "clts", false, NONE, 0, 0 },
259 /*07*/ { "sysret",false, NONE, 0, 0 },
260
261 /*08*/ { "invd", false, NONE, 0, 0 },
262 /*09*/ { "wbinvd",false, NONE, 0, 0 },
263 /*0a*/ { "", false, NONE, 0, 0 },
264 /*0b*/ { "", false, NONE, 0, 0 },
265 /*0c*/ { "", false, NONE, 0, 0 },
266 /*0d*/ { "", false, NONE, 0, 0 },
267 /*0e*/ { "", false, NONE, 0, 0 },
268 /*0f*/ { "", false, NONE, 0, 0 },
269 };
270
271 static const struct inst db_inst_0f1x[] = {
272 /*10*/ { "", false, NONE, 0, 0 },
273 /*11*/ { "", false, NONE, 0, 0 },
274 /*12*/ { "", false, NONE, 0, 0 },
275 /*13*/ { "", false, NONE, 0, 0 },
276 /*14*/ { "", false, NONE, 0, 0 },
277 /*15*/ { "", false, NONE, 0, 0 },
278 /*16*/ { "", false, NONE, 0, 0 },
279 /*17*/ { "", false, NONE, 0, 0 },
280
281 /*18*/ { "", false, NONE, 0, 0 },
282 /*19*/ { "", false, NONE, 0, 0 },
283 /*1a*/ { "", false, NONE, 0, 0 },
284 /*1b*/ { "", false, NONE, 0, 0 },
285 /*1c*/ { "", false, NONE, 0, 0 },
286 /*1d*/ { "", false, NONE, 0, 0 },
287 /*1e*/ { "", false, NONE, 0, 0 },
288 /*1f*/ { "nopl", true, SDEP, 0, "nopw" },
289 };
290
291 static const struct inst db_inst_0f2x[] = {
292 /*20*/ { "mov", true, LONG, op2(CR,El), 0 },
293 /*21*/ { "mov", true, LONG, op2(DR,El), 0 },
294 /*22*/ { "mov", true, LONG, op2(El,CR), 0 },
295 /*23*/ { "mov", true, LONG, op2(El,DR), 0 },
296 /*24*/ { "mov", true, LONG, op2(TR,El), 0 },
297 /*25*/ { "", false, NONE, 0, 0 },
298 /*26*/ { "mov", true, LONG, op2(El,TR), 0 },
299 /*27*/ { "", false, NONE, 0, 0 },
300
301 /*28*/ { "", false, NONE, 0, 0 },
302 /*29*/ { "", false, NONE, 0, 0 },
303 /*2a*/ { "", false, NONE, 0, 0 },
304 /*2b*/ { "", false, NONE, 0, 0 },
305 /*2c*/ { "", false, NONE, 0, 0 },
306 /*2d*/ { "", false, NONE, 0, 0 },
307 /*2e*/ { "", false, NONE, 0, 0 },
308 /*2f*/ { "", false, NONE, 0, 0 },
309 };
310
311 static const struct inst db_inst_0f3x[] = {
312 /*30*/ { "wrmsr", false, NONE, 0, 0 },
313 /*31*/ { "rdtsc", false, NONE, 0, 0 },
314 /*32*/ { "rdmsr", false, NONE, 0, 0 },
315 /*33*/ { "rdpmc", false, NONE, 0, 0 },
316 /*34*/ { "sysenter",false,NONE, 0, 0 },
317 /*35*/ { "sysexit",false,NONE, 0, 0 },
318 /*36*/ { "", false, NONE, 0, 0 },
319 /*37*/ { "getsec",false, NONE, 0, 0 },
320
321 /*38*/ { "", false, ESC, 0, db_inst_0f38 },
322 /*39*/ { "", false, NONE, 0, 0 },
323 /*3a*/ { "", false, NONE, 0, 0 },
324 /*3b*/ { "", false, NONE, 0, 0 },
325 /*3c*/ { "", false, NONE, 0, 0 },
326 /*3d*/ { "", false, NONE, 0, 0 },
327 /*3e*/ { "", false, NONE, 0, 0 },
328 /*3f*/ { "", false, NONE, 0, 0 },
329 };
330
331 static const struct inst db_inst_0f4x[] = {
332 /*40*/ { "cmovo", true, NONE, op2(E, R), 0 },
333 /*41*/ { "cmovno", true, NONE, op2(E, R), 0 },
334 /*42*/ { "cmovb", true, NONE, op2(E, R), 0 },
335 /*43*/ { "cmovnb", true, NONE, op2(E, R), 0 },
336 /*44*/ { "cmovz", true, NONE, op2(E, R), 0 },
337 /*45*/ { "cmovnz", true, NONE, op2(E, R), 0 },
338 /*46*/ { "cmovbe", true, NONE, op2(E, R), 0 },
339 /*47*/ { "cmovnbe",true, NONE, op2(E, R), 0 },
340
341 /*48*/ { "cmovs", true, NONE, op2(E, R), 0 },
342 /*49*/ { "cmovns", true, NONE, op2(E, R), 0 },
343 /*4a*/ { "cmovp", true, NONE, op2(E, R), 0 },
344 /*4b*/ { "cmovnp", true, NONE, op2(E, R), 0 },
345 /*4c*/ { "cmovl", true, NONE, op2(E, R), 0 },
346 /*4d*/ { "cmovnl", true, NONE, op2(E, R), 0 },
347 /*4e*/ { "cmovle", true, NONE, op2(E, R), 0 },
348 /*4f*/ { "cmovnle",true, NONE, op2(E, R), 0 },
349 };
350
351 static const struct inst db_inst_0f7x[] = {
352 /*70*/ { "", false, NONE, 0, 0 },
353 /*71*/ { "", false, NONE, 0, 0 },
354 /*72*/ { "", false, NONE, 0, 0 },
355 /*73*/ { "", false, NONE, 0, 0 },
356 /*74*/ { "", false, NONE, 0, 0 },
357 /*75*/ { "", false, NONE, 0, 0 },
358 /*76*/ { "", false, NONE, 0, 0 },
359 /*77*/ { "", false, NONE, 0, 0 },
360
361 /*78*/ { "vmread", true, NONE, op2(Rq, E), 0 },
362 /*79*/ { "vmwrite",true, NONE, op2(E, Rq), 0 },
363 /*7a*/ { "", false, NONE, 0, 0 },
364 /*7b*/ { "", false, NONE, 0, 0 },
365 /*7c*/ { "", false, NONE, 0, 0 },
366 /*7d*/ { "", false, NONE, 0, 0 },
367 /*7e*/ { "", false, NONE, 0, 0 },
368 /*7f*/ { "", false, NONE, 0, 0 },
369 };
370
371 static const struct inst db_inst_0f8x[] = {
372 /*80*/ { "jo", false, NONE, op1(Dl), 0 },
373 /*81*/ { "jno", false, NONE, op1(Dl), 0 },
374 /*82*/ { "jb", false, NONE, op1(Dl), 0 },
375 /*83*/ { "jnb", false, NONE, op1(Dl), 0 },
376 /*84*/ { "jz", false, NONE, op1(Dl), 0 },
377 /*85*/ { "jnz", false, NONE, op1(Dl), 0 },
378 /*86*/ { "jbe", false, NONE, op1(Dl), 0 },
379 /*87*/ { "jnbe", false, NONE, op1(Dl), 0 },
380
381 /*88*/ { "js", false, NONE, op1(Dl), 0 },
382 /*89*/ { "jns", false, NONE, op1(Dl), 0 },
383 /*8a*/ { "jp", false, NONE, op1(Dl), 0 },
384 /*8b*/ { "jnp", false, NONE, op1(Dl), 0 },
385 /*8c*/ { "jl", false, NONE, op1(Dl), 0 },
386 /*8d*/ { "jnl", false, NONE, op1(Dl), 0 },
387 /*8e*/ { "jle", false, NONE, op1(Dl), 0 },
388 /*8f*/ { "jnle", false, NONE, op1(Dl), 0 },
389 };
390
391 static const struct inst db_inst_0f9x[] = {
392 /*90*/ { "seto", true, NONE, op1(Eb), 0 },
393 /*91*/ { "setno", true, NONE, op1(Eb), 0 },
394 /*92*/ { "setb", true, NONE, op1(Eb), 0 },
395 /*93*/ { "setnb", true, NONE, op1(Eb), 0 },
396 /*94*/ { "setz", true, NONE, op1(Eb), 0 },
397 /*95*/ { "setnz", true, NONE, op1(Eb), 0 },
398 /*96*/ { "setbe", true, NONE, op1(Eb), 0 },
399 /*97*/ { "setnbe",true, NONE, op1(Eb), 0 },
400
401 /*98*/ { "sets", true, NONE, op1(Eb), 0 },
402 /*99*/ { "setns", true, NONE, op1(Eb), 0 },
403 /*9a*/ { "setp", true, NONE, op1(Eb), 0 },
404 /*9b*/ { "setnp", true, NONE, op1(Eb), 0 },
405 /*9c*/ { "setl", true, NONE, op1(Eb), 0 },
406 /*9d*/ { "setnl", true, NONE, op1(Eb), 0 },
407 /*9e*/ { "setle", true, NONE, op1(Eb), 0 },
408 /*9f*/ { "setnle",true, NONE, op1(Eb), 0 },
409 };
410
411 static const struct inst db_inst_0fax[] = {
412 /*a0*/ { "push", false, NONE, op1(Si), 0 },
413 /*a1*/ { "pop", false, NONE, op1(Si), 0 },
414 /*a2*/ { "cpuid", false, NONE, 0, 0 },
415 /*a3*/ { "bt", true, LONG, op2(R,E), 0 },
416 /*a4*/ { "shld", true, LONG, op3(Ib,R,E), 0 },
417 /*a5*/ { "shld", true, LONG, op3(CL,R,E), 0 },
418 /*a6*/ { "", false, NONE, 0, 0 },
419 /*a7*/ { "", false, NONE, 0, 0 },
420
421 /*a8*/ { "push", false, NONE, op1(Si), 0 },
422 /*a9*/ { "pop", false, NONE, op1(Si), 0 },
423 /*aa*/ { "rsm", false, NONE, 0, 0 },
424 /*ab*/ { "bts", true, LONG, op2(R,E), 0 },
425 /*ac*/ { "shrd", true, LONG, op3(Ib,R,E), 0 },
426 /*ad*/ { "shrd", true, LONG, op3(CL,R,E), 0 },
427 /*ae*/ { "", true, LONG, op1(E), db_Grp15 },
428 /*af*/ { "imul", true, LONG, op2(E,R), 0 },
429 };
430
431 static const struct inst db_inst_0fbx[] = {
432 /*b0*/ { "cmpxchg",true, BYTE, op2(R, E), 0 },
433 /*b0*/ { "cmpxchg",true, LONG, op2(R, E), 0 },
434 /*b2*/ { "lss", true, LONG, op2(E, R), 0 },
435 /*b3*/ { "btr", true, LONG, op2(R, E), 0 },
436 /*b4*/ { "lfs", true, LONG, op2(E, R), 0 },
437 /*b5*/ { "lgs", true, LONG, op2(E, R), 0 },
438 /*b6*/ { "movzb", true, LONG, op2(Eb, R), 0 },
439 /*b7*/ { "movzw", true, LONG, op2(Ew, R), 0 },
440
441 /*b8*/ { "", false, NONE, 0, 0 },
442 /*b9*/ { "", false, NONE, 0, 0 },
443 /*ba*/ { "", true, LONG, op2(Ib, E), db_Grp8 },
444 /*bb*/ { "btc", true, LONG, op2(R, E), 0 },
445 /*bc*/ { "bsf", true, LONG, op2(E, R), 0 },
446 /*bd*/ { "bsr", true, LONG, op2(E, R), 0 },
447 /*be*/ { "movsb", true, LONG, op2(Eb, R), 0 },
448 /*bf*/ { "movsw", true, LONG, op2(Ew, R), 0 },
449 };
450
451 static const struct inst db_inst_0fcx[] = {
452 /*c0*/ { "xadd", true, BYTE, op2(R, E), 0 },
453 /*c1*/ { "xadd", true, LONG, op2(R, E), 0 },
454 /*c2*/ { "", false, NONE, 0, 0 },
455 /*c3*/ { "", false, NONE, 0, 0 },
456 /*c4*/ { "", false, NONE, 0, 0 },
457 /*c5*/ { "", false, NONE, 0, 0 },
458 /*c6*/ { "", false, NONE, 0, 0 },
459 /*c7*/ { "", true, NONE, op1(E), db_Grp9 },
460 /*c8*/ { "bswap", false, LONG, op1(Ril), 0 },
461 /*c9*/ { "bswap", false, LONG, op1(Ril), 0 },
462 /*ca*/ { "bswap", false, LONG, op1(Ril), 0 },
463 /*cb*/ { "bswap", false, LONG, op1(Ril), 0 },
464 /*cc*/ { "bswap", false, LONG, op1(Ril), 0 },
465 /*cd*/ { "bswap", false, LONG, op1(Ril), 0 },
466 /*ce*/ { "bswap", false, LONG, op1(Ril), 0 },
467 /*cf*/ { "bswap", false, LONG, op1(Ril), 0 },
468 };
469
470 static const struct inst * const db_inst_0f[] = {
471 db_inst_0f0x,
472 db_inst_0f1x,
473 db_inst_0f2x,
474 db_inst_0f3x,
475 db_inst_0f4x,
476 0,
477 0,
478 db_inst_0f7x,
479 db_inst_0f8x,
480 db_inst_0f9x,
481 db_inst_0fax,
482 db_inst_0fbx,
483 db_inst_0fcx,
484 0,
485 0,
486 0
487 };
488
489 static const char * const db_Esc92[] = {
490 "fnop", "", "", "", "", "", "", ""
491 };
492 static const char * const db_Esc94[] = {
493 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
494 };
495 static const char * const db_Esc95[] = {
496 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
497 };
498 static const char * const db_Esc96[] = {
499 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
500 "fincstp"
501 };
502 static const char * const db_Esc97[] = {
503 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
504 };
505
506 static const char * const db_Esca5[] = {
507 "", "fucompp","", "", "", "", "", ""
508 };
509
510 static const char * const db_Escb4[] = {
511 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
512 };
513
514 static const char * const db_Esce3[] = {
515 "", "fcompp","", "", "", "", "", ""
516 };
517
518 static const char * const db_Escf4[] = {
519 "fnstsw","", "", "", "", "", "", ""
520 };
521
522 static const struct finst db_Esc8[] = {
523 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
524 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
525 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
526 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
527 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
528 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
529 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
530 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
531 };
532
533 static const struct finst db_Esc9[] = {
534 /*0*/ { "fld", SNGL, op1(STI), 0 },
535 /*1*/ { "", NONE, op1(STI), "fxch" },
536 /*2*/ { "fst", SNGL, op1(X), db_Esc92 },
537 /*3*/ { "fstp", SNGL, 0, 0 },
538 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
539 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
540 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
541 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
542 };
543
544 static const struct finst db_Esca[] = {
545 /*0*/ { "fiadd", LONG, 0, 0 },
546 /*1*/ { "fimul", LONG, 0, 0 },
547 /*2*/ { "ficom", LONG, 0, 0 },
548 /*3*/ { "ficomp", LONG, 0, 0 },
549 /*4*/ { "fisub", LONG, 0, 0 },
550 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
551 /*6*/ { "fidiv", LONG, 0, 0 },
552 /*7*/ { "fidivr", LONG, 0, 0 }
553 };
554
555 static const struct finst db_Escb[] = {
556 /*0*/ { "fild", LONG, 0, 0 },
557 /*1*/ { "", NONE, 0, 0 },
558 /*2*/ { "fist", LONG, 0, 0 },
559 /*3*/ { "fistp", LONG, 0, 0 },
560 /*4*/ { "", WORD, op1(X), db_Escb4 },
561 /*5*/ { "fld", EXTR, 0, 0 },
562 /*6*/ { "", WORD, 0, 0 },
563 /*7*/ { "fstp", EXTR, 0, 0 },
564 };
565
566 static const struct finst db_Escc[] = {
567 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
568 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
569 /*2*/ { "fcom", DBLR, 0, 0 },
570 /*3*/ { "fcomp", DBLR, 0, 0 },
571 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
572 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
573 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
574 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
575 };
576
577 static const struct finst db_Escd[] = {
578 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
579 /*1*/ { "", NONE, 0, 0 },
580 /*2*/ { "fst", DBLR, op1(STI), 0 },
581 /*3*/ { "fstp", DBLR, op1(STI), 0 },
582 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
583 /*5*/ { "", NONE, op1(STI), "fucomp" },
584 /*6*/ { "fnsave", NONE, 0, 0 },
585 /*7*/ { "fnstsw", NONE, 0, 0 },
586 };
587
588 static const struct finst db_Esce[] = {
589 /*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" },
590 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
591 /*2*/ { "ficom", WORD, 0, 0 },
592 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
593 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
594 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
595 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
596 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
597 };
598
599 static const struct finst db_Escf[] = {
600 /*0*/ { "fild", WORD, 0, 0 },
601 /*1*/ { "", NONE, 0, 0 },
602 /*2*/ { "fist", WORD, 0, 0 },
603 /*3*/ { "fistp", WORD, 0, 0 },
604 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
605 /*5*/ { "fild", QUAD, 0, 0 },
606 /*6*/ { "fbstp", NONE, 0, 0 },
607 /*7*/ { "fistp", QUAD, 0, 0 },
608 };
609
610 static const struct finst * const db_Esc_inst[] = {
611 db_Esc8, db_Esc9, db_Esca, db_Escb,
612 db_Escc, db_Escd, db_Esce, db_Escf
613 };
614
615 static const char * const db_Grp1[] = {
616 "add",
617 "or",
618 "adc",
619 "sbb",
620 "and",
621 "sub",
622 "xor",
623 "cmp"
624 };
625
626 static const char * const db_Grp2[] = {
627 "rol",
628 "ror",
629 "rcl",
630 "rcr",
631 "shl",
632 "shr",
633 "shl",
634 "sar"
635 };
636
637 static const struct inst db_Grp3[] = {
638 { "test", true, NONE, op2(I,E), 0 },
639 { "test", true, NONE, op2(I,E), 0 },
640 { "not", true, NONE, op1(E), 0 },
641 { "neg", true, NONE, op1(E), 0 },
642 { "mul", true, NONE, op2(E,A), 0 },
643 { "imul", true, NONE, op2(E,A), 0 },
644 { "div", true, NONE, op2(E,A), 0 },
645 { "idiv", true, NONE, op2(E,A), 0 },
646 };
647
648 static const struct inst db_Grp4[] = {
649 { "inc", true, BYTE, op1(E), 0 },
650 { "dec", true, BYTE, op1(E), 0 },
651 { "", true, NONE, 0, 0 },
652 { "", true, NONE, 0, 0 },
653 { "", true, NONE, 0, 0 },
654 { "", true, NONE, 0, 0 },
655 { "", true, NONE, 0, 0 },
656 { "", true, NONE, 0, 0 }
657 };
658
659 static const struct inst db_Grp5[] = {
660 { "inc", true, LONG, op1(E), 0 },
661 { "dec", true, LONG, op1(E), 0 },
662 { "call", true, LONG, op1(Eind),0 },
663 { "lcall", true, LONG, op1(Eind),0 },
664 { "jmp", true, LONG, op1(Eind),0 },
665 { "ljmp", true, LONG, op1(Eind),0 },
666 { "push", true, LONG, op1(E), 0 },
667 { "", true, NONE, 0, 0 }
668 };
669
670 static const struct inst db_Grp9b[] = {
671 { "", true, NONE, 0, 0 },
672 { "", true, NONE, 0, 0 },
673 { "", true, NONE, 0, 0 },
674 { "", true, NONE, 0, 0 },
675 { "", true, NONE, 0, 0 },
676 { "", true, NONE, 0, 0 },
677 { "rdrand",true, LONG, op1(Rv), 0 },
678 { "rdseed",true, LONG, op1(Rv), 0 }
679 };
680
681 static const struct inst db_inst_table[256] = {
682 /*00*/ { "add", true, BYTE, op2(R, E), 0 },
683 /*01*/ { "add", true, LONG, op2(R, E), 0 },
684 /*02*/ { "add", true, BYTE, op2(E, R), 0 },
685 /*03*/ { "add", true, LONG, op2(E, R), 0 },
686 /*04*/ { "add", false, BYTE, op2(I, A), 0 },
687 /*05*/ { "add", false, LONG, op2(Is, A), 0 },
688 /*06*/ { "push", false, NONE, op1(Si), 0 },
689 /*07*/ { "pop", false, NONE, op1(Si), 0 },
690
691 /*08*/ { "or", true, BYTE, op2(R, E), 0 },
692 /*09*/ { "or", true, LONG, op2(R, E), 0 },
693 /*0a*/ { "or", true, BYTE, op2(E, R), 0 },
694 /*0b*/ { "or", true, LONG, op2(E, R), 0 },
695 /*0c*/ { "or", false, BYTE, op2(I, A), 0 },
696 /*0d*/ { "or", false, LONG, op2(I, A), 0 },
697 /*0e*/ { "push", false, NONE, op1(Si), 0 },
698 /*0f*/ { "", false, ESC, 0, db_inst_0f },
699
700 /*10*/ { "adc", true, BYTE, op2(R, E), 0 },
701 /*11*/ { "adc", true, LONG, op2(R, E), 0 },
702 /*12*/ { "adc", true, BYTE, op2(E, R), 0 },
703 /*13*/ { "adc", true, LONG, op2(E, R), 0 },
704 /*14*/ { "adc", false, BYTE, op2(I, A), 0 },
705 /*15*/ { "adc", false, LONG, op2(Is, A), 0 },
706 /*16*/ { "push", false, NONE, op1(Si), 0 },
707 /*17*/ { "pop", false, NONE, op1(Si), 0 },
708
709 /*18*/ { "sbb", true, BYTE, op2(R, E), 0 },
710 /*19*/ { "sbb", true, LONG, op2(R, E), 0 },
711 /*1a*/ { "sbb", true, BYTE, op2(E, R), 0 },
712 /*1b*/ { "sbb", true, LONG, op2(E, R), 0 },
713 /*1c*/ { "sbb", false, BYTE, op2(I, A), 0 },
714 /*1d*/ { "sbb", false, LONG, op2(Is, A), 0 },
715 /*1e*/ { "push", false, NONE, op1(Si), 0 },
716 /*1f*/ { "pop", false, NONE, op1(Si), 0 },
717
718 /*20*/ { "and", true, BYTE, op2(R, E), 0 },
719 /*21*/ { "and", true, LONG, op2(R, E), 0 },
720 /*22*/ { "and", true, BYTE, op2(E, R), 0 },
721 /*23*/ { "and", true, LONG, op2(E, R), 0 },
722 /*24*/ { "and", false, BYTE, op2(I, A), 0 },
723 /*25*/ { "and", false, LONG, op2(I, A), 0 },
724 /*26*/ { "", false, NONE, 0, 0 },
725 /*27*/ { "daa", false, NONE, 0, 0 },
726
727 /*28*/ { "sub", true, BYTE, op2(R, E), 0 },
728 /*29*/ { "sub", true, LONG, op2(R, E), 0 },
729 /*2a*/ { "sub", true, BYTE, op2(E, R), 0 },
730 /*2b*/ { "sub", true, LONG, op2(E, R), 0 },
731 /*2c*/ { "sub", false, BYTE, op2(I, A), 0 },
732 /*2d*/ { "sub", false, LONG, op2(Is, A), 0 },
733 /*2e*/ { "", false, NONE, 0, 0 },
734 /*2f*/ { "das", false, NONE, 0, 0 },
735
736 /*30*/ { "xor", true, BYTE, op2(R, E), 0 },
737 /*31*/ { "xor", true, LONG, op2(R, E), 0 },
738 /*32*/ { "xor", true, BYTE, op2(E, R), 0 },
739 /*33*/ { "xor", true, LONG, op2(E, R), 0 },
740 /*34*/ { "xor", false, BYTE, op2(I, A), 0 },
741 /*35*/ { "xor", false, LONG, op2(I, A), 0 },
742 /*36*/ { "", false, NONE, 0, 0 },
743 /*37*/ { "aaa", false, NONE, 0, 0 },
744
745 /*38*/ { "cmp", true, BYTE, op2(R, E), 0 },
746 /*39*/ { "cmp", true, LONG, op2(R, E), 0 },
747 /*3a*/ { "cmp", true, BYTE, op2(E, R), 0 },
748 /*3b*/ { "cmp", true, LONG, op2(E, R), 0 },
749 /*3c*/ { "cmp", false, BYTE, op2(I, A), 0 },
750 /*3d*/ { "cmp", false, LONG, op2(Is, A), 0 },
751 /*3e*/ { "", false, NONE, 0, 0 },
752 /*3f*/ { "aas", false, NONE, 0, 0 },
753
754 /*40*/ { "rex", false, NONE, 0, 0 },
755 /*41*/ { "rex.b", false, NONE, 0, 0 },
756 /*42*/ { "rex.x", false, NONE, 0, 0 },
757 /*43*/ { "rex.xb", false, NONE, 0, 0 },
758 /*44*/ { "rex.r", false, NONE, 0, 0 },
759 /*45*/ { "rex.rb", false, NONE, 0, 0 },
760 /*46*/ { "rex.rx", false, NONE, 0, 0 },
761 /*47*/ { "rex.rxb", false, NONE, 0, 0 },
762
763 /*48*/ { "rex.w", false, NONE, 0, 0 },
764 /*49*/ { "rex.wb", false, NONE, 0, 0 },
765 /*4a*/ { "rex.wx", false, NONE, 0, 0 },
766 /*4b*/ { "rex.wxb", false, NONE, 0, 0 },
767 /*4c*/ { "rex.wr", false, NONE, 0, 0 },
768 /*4d*/ { "rex.wrb", false, NONE, 0, 0 },
769 /*4e*/ { "rex.wrx", false, NONE, 0, 0 },
770 /*4f*/ { "rex.wrxb", false, NONE, 0, 0 },
771
772 /*50*/ { "push", false, LONG, op1(Ri), 0 },
773 /*51*/ { "push", false, LONG, op1(Ri), 0 },
774 /*52*/ { "push", false, LONG, op1(Ri), 0 },
775 /*53*/ { "push", false, LONG, op1(Ri), 0 },
776 /*54*/ { "push", false, LONG, op1(Ri), 0 },
777 /*55*/ { "push", false, LONG, op1(Ri), 0 },
778 /*56*/ { "push", false, LONG, op1(Ri), 0 },
779 /*57*/ { "push", false, LONG, op1(Ri), 0 },
780
781 /*58*/ { "pop", false, LONG, op1(Ri), 0 },
782 /*59*/ { "pop", false, LONG, op1(Ri), 0 },
783 /*5a*/ { "pop", false, LONG, op1(Ri), 0 },
784 /*5b*/ { "pop", false, LONG, op1(Ri), 0 },
785 /*5c*/ { "pop", false, LONG, op1(Ri), 0 },
786 /*5d*/ { "pop", false, LONG, op1(Ri), 0 },
787 /*5e*/ { "pop", false, LONG, op1(Ri), 0 },
788 /*5f*/ { "pop", false, LONG, op1(Ri), 0 },
789
790 /*60*/ { "pusha", false, LONG, 0, 0 },
791 /*61*/ { "popa", false, LONG, 0, 0 },
792 /*62*/ { "bound", true, LONG, op2(E, R), 0 },
793 /*63*/ { "movslq", true, NONE, op2(EL,R), 0 },
794
795 /*64*/ { "", false, NONE, 0, 0 },
796 /*65*/ { "", false, NONE, 0, 0 },
797 /*66*/ { "", false, NONE, 0, 0 },
798 /*67*/ { "", false, NONE, 0, 0 },
799
800 /*68*/ { "push", false, LONG, op1(I), 0 },
801 /*69*/ { "imul", true, LONG, op3(I,E,R), 0 },
802 /*6a*/ { "push", false, LONG, op1(Ibs), 0 },
803 /*6b*/ { "imul", true, LONG, op3(Ibs,E,R),0 },
804 /*6c*/ { "ins", false, BYTE, op2(DX, DI), 0 },
805 /*6d*/ { "ins", false, LONG, op2(DX, DI), 0 },
806 /*6e*/ { "outs", false, BYTE, op2(SI, DX), 0 },
807 /*6f*/ { "outs", false, LONG, op2(SI, DX), 0 },
808
809 /*70*/ { "jo", false, NONE, op1(Db), 0 },
810 /*71*/ { "jno", false, NONE, op1(Db), 0 },
811 /*72*/ { "jb", false, NONE, op1(Db), 0 },
812 /*73*/ { "jnb", false, NONE, op1(Db), 0 },
813 /*74*/ { "jz", false, NONE, op1(Db), 0 },
814 /*75*/ { "jnz", false, NONE, op1(Db), 0 },
815 /*76*/ { "jbe", false, NONE, op1(Db), 0 },
816 /*77*/ { "jnbe", false, NONE, op1(Db), 0 },
817
818 /*78*/ { "js", false, NONE, op1(Db), 0 },
819 /*79*/ { "jns", false, NONE, op1(Db), 0 },
820 /*7a*/ { "jp", false, NONE, op1(Db), 0 },
821 /*7b*/ { "jnp", false, NONE, op1(Db), 0 },
822 /*7c*/ { "jl", false, NONE, op1(Db), 0 },
823 /*7d*/ { "jnl", false, NONE, op1(Db), 0 },
824 /*7e*/ { "jle", false, NONE, op1(Db), 0 },
825 /*7f*/ { "jnle", false, NONE, op1(Db), 0 },
826
827 /*80*/ { "", true, BYTE, op2(I, E), db_Grp1 },
828 /*81*/ { "", true, LONG, op2(I, E), db_Grp1 },
829 /*82*/ { "", true, BYTE, op2(I, E), db_Grp1 },
830 /*83*/ { "", true, LONG, op2(Ibs,E), db_Grp1 },
831 /*84*/ { "test", true, BYTE, op2(R, E), 0 },
832 /*85*/ { "test", true, LONG, op2(R, E), 0 },
833 /*86*/ { "xchg", true, BYTE, op2(R, E), 0 },
834 /*87*/ { "xchg", true, LONG, op2(R, E), 0 },
835
836 /*88*/ { "mov", true, BYTE, op2(R, E), 0 },
837 /*89*/ { "mov", true, LONG, op2(R, E), 0 },
838 /*8a*/ { "mov", true, BYTE, op2(E, R), 0 },
839 /*8b*/ { "mov", true, LONG, op2(E, R), 0 },
840 /*8c*/ { "mov", true, NONE, op2(S, Ew), 0 },
841 /*8d*/ { "lea", true, LONG, op2(E, R), 0 },
842 /*8e*/ { "mov", true, NONE, op2(Ew, S), 0 },
843 /*8f*/ { "pop", true, LONG, op1(E), 0 },
844
845 /*90*/ { "nop", false, NONE, 0, 0 },
846 /*91*/ { "xchg", false, LONG, op2(A, Ri), 0 },
847 /*92*/ { "xchg", false, LONG, op2(A, Ri), 0 },
848 /*93*/ { "xchg", false, LONG, op2(A, Ri), 0 },
849 /*94*/ { "xchg", false, LONG, op2(A, Ri), 0 },
850 /*95*/ { "xchg", false, LONG, op2(A, Ri), 0 },
851 /*96*/ { "xchg", false, LONG, op2(A, Ri), 0 },
852 /*97*/ { "xchg", false, LONG, op2(A, Ri), 0 },
853
854 /*98*/ { "cwde", false, SDEP, 0, "cbw" },
855 /*99*/ { "cdq", false, SDEP, 0, "cwd" },
856 /*9a*/ { "lcall", false, NONE, op1(OS), 0 },
857 /*9b*/ { "wait", false, NONE, 0, 0 },
858 /*9c*/ { "pushf", false, LONG, 0, 0 },
859 /*9d*/ { "popf", false, LONG, 0, 0 },
860 /*9e*/ { "sahf", false, NONE, 0, 0 },
861 /*9f*/ { "lahf", false, NONE, 0, 0 },
862
863 /*a0*/ { "mov", false, BYTE, op2(O, A), 0 },
864 /*a1*/ { "mov", false, LONG, op2(O, A), 0 },
865 /*a2*/ { "mov", false, BYTE, op2(A, O), 0 },
866 /*a3*/ { "mov", false, LONG, op2(A, O), 0 },
867 /*a4*/ { "movs", false, BYTE, op2(SI,DI), 0 },
868 /*a5*/ { "movs", false, LONG, op2(SI,DI), 0 },
869 /*a6*/ { "cmps", false, BYTE, op2(SI,DI), 0 },
870 /*a7*/ { "cmps", false, LONG, op2(SI,DI), 0 },
871
872 /*a8*/ { "test", false, BYTE, op2(I, A), 0 },
873 /*a9*/ { "test", false, LONG, op2(I, A), 0 },
874 /*aa*/ { "stos", false, BYTE, op1(DI), 0 },
875 /*ab*/ { "stos", false, LONG, op1(DI), 0 },
876 /*ac*/ { "lods", false, BYTE, op1(SI), 0 },
877 /*ad*/ { "lods", false, LONG, op1(SI), 0 },
878 /*ae*/ { "scas", false, BYTE, op1(SI), 0 },
879 /*af*/ { "scas", false, LONG, op1(SI), 0 },
880
881 /*b0*/ { "mov", false, BYTE, op2(I, Ri), 0 },
882 /*b1*/ { "mov", false, BYTE, op2(I, Ri), 0 },
883 /*b2*/ { "mov", false, BYTE, op2(I, Ri), 0 },
884 /*b3*/ { "mov", false, BYTE, op2(I, Ri), 0 },
885 /*b4*/ { "mov", false, BYTE, op2(I, Ri), 0 },
886 /*b5*/ { "mov", false, BYTE, op2(I, Ri), 0 },
887 /*b6*/ { "mov", false, BYTE, op2(I, Ri), 0 },
888 /*b7*/ { "mov", false, BYTE, op2(I, Ri), 0 },
889
890 /*b8*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
891 /*b9*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
892 /*ba*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
893 /*bb*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
894 /*bc*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
895 /*bd*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
896 /*be*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
897 /*bf*/ { "mov", false, LONG, op2(Ilq, Ri), 0 },
898
899 /*c0*/ { "", true, BYTE, op2(Ib, E), db_Grp2 },
900 /*c1*/ { "", true, LONG, op2(Ib, E), db_Grp2 },
901 /*c2*/ { "ret", false, NONE, op1(Iw), 0 },
902 /*c3*/ { "ret", false, NONE, 0, 0 },
903 /*c4*/ { "les", true, LONG, op2(E, R), 0 },
904 /*c5*/ { "lds", true, LONG, op2(E, R), 0 },
905 /*c6*/ { "mov", true, BYTE, op2(I, E), 0 },
906 /*c7*/ { "mov", true, LONG, op2(I, E), 0 },
907
908 /*c8*/ { "enter", false, NONE, op2(Iw, Ib), 0 },
909 /*c9*/ { "leave", false, NONE, 0, 0 },
910 /*ca*/ { "lret", false, NONE, op1(Iw), 0 },
911 /*cb*/ { "lret", false, NONE, 0, 0 },
912 /*cc*/ { "int", false, NONE, op1(o3), 0 },
913 /*cd*/ { "int", false, NONE, op1(Ib), 0 },
914 /*ce*/ { "into", false, NONE, 0, 0 },
915 /*cf*/ { "iret", false, NONE, 0, 0 },
916
917 /*d0*/ { "", true, BYTE, op2(o1, E), db_Grp2 },
918 /*d1*/ { "", true, LONG, op2(o1, E), db_Grp2 },
919 /*d2*/ { "", true, BYTE, op2(CL, E), db_Grp2 },
920 /*d3*/ { "", true, LONG, op2(CL, E), db_Grp2 },
921 /*d4*/ { "aam", false, NONE, op1(Iba), 0 },
922 /*d5*/ { "aad", false, NONE, op1(Iba), 0 },
923 /*d6*/ { ".byte\t0xd6", false, NONE, 0, 0 },
924 /*d7*/ { "xlat", false, BYTE, op1(BX), 0 },
925
926 /*d8*/ { "", true, NONE, 0, db_Esc8 },
927 /*d9*/ { "", true, NONE, 0, db_Esc9 },
928 /*da*/ { "", true, NONE, 0, db_Esca },
929 /*db*/ { "", true, NONE, 0, db_Escb },
930 /*dc*/ { "", true, NONE, 0, db_Escc },
931 /*dd*/ { "", true, NONE, 0, db_Escd },
932 /*de*/ { "", true, NONE, 0, db_Esce },
933 /*df*/ { "", true, NONE, 0, db_Escf },
934
935 /*e0*/ { "loopne",false, NONE, op1(Db), 0 },
936 /*e1*/ { "loope", false, NONE, op1(Db), 0 },
937 /*e2*/ { "loop", false, NONE, op1(Db), 0 },
938 /*e3*/ { "jrcxz", false, ADEP, op1(Db), "jecxz" },
939 /*e4*/ { "in", false, BYTE, op2(Ib, A), 0 },
940 /*e5*/ { "in", false, LONG, op2(Ib, A) , 0 },
941 /*e6*/ { "out", false, BYTE, op2(A, Ib), 0 },
942 /*e7*/ { "out", false, LONG, op2(A, Ib) , 0 },
943
944 /*e8*/ { "call", false, NONE, op1(Dl), 0 },
945 /*e9*/ { "jmp", false, NONE, op1(Dl), 0 },
946 /*ea*/ { "ljmp", false, NONE, op1(OS), 0 },
947 /*eb*/ { "jmp", false, NONE, op1(Db), 0 },
948 /*ec*/ { "in", false, BYTE, op2(DX, A), 0 },
949 /*ed*/ { "in", false, LONG, op2(DX, A) , 0 },
950 /*ee*/ { "out", false, BYTE, op2(A, DX), 0 },
951 /*ef*/ { "out", false, LONG, op2(A, DX) , 0 },
952
953 /*f0*/ { "", false, NONE, 0, 0 },
954 /*f1*/ { ".byte\t0xf1", false, NONE, 0, 0 },
955 /*f2*/ { "", false, NONE, 0, 0 },
956 /*f3*/ { "", false, NONE, 0, 0 },
957 /*f4*/ { "hlt", false, NONE, 0, 0 },
958 /*f5*/ { "cmc", false, NONE, 0, 0 },
959 /*f6*/ { "", true, BYTE, 0, db_Grp3 },
960 /*f7*/ { "", true, LONG, 0, db_Grp3 },
961
962 /*f8*/ { "clc", false, NONE, 0, 0 },
963 /*f9*/ { "stc", false, NONE, 0, 0 },
964 /*fa*/ { "cli", false, NONE, 0, 0 },
965 /*fb*/ { "sti", false, NONE, 0, 0 },
966 /*fc*/ { "cld", false, NONE, 0, 0 },
967 /*fd*/ { "std", false, NONE, 0, 0 },
968 /*fe*/ { "", true, NONE, 0, db_Grp4 },
969 /*ff*/ { "", true, NONE, 0, db_Grp5 },
970 };
971
972 static const struct inst db_bad_inst =
973 { "???", false, NONE, 0, 0 }
974 ;
975
976 #define f_mod(rex, byte) ((byte)>>6)
977 #define f_reg(rex, byte) ((((byte)>>3)&0x7) | (rex & REX_R ? 0x8 : 0x0))
978 #define f_rm(rex, byte) (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
979
980 #define sib_ss(rex, byte) ((byte)>>6)
981 #define sib_index(rex, byte) ((((byte)>>3)&0x7) | (rex & REX_X ? 0x8 : 0x0))
982 #define sib_base(rex, byte) (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
983
984 struct i_addr {
985 bool is_reg; /* if reg, reg number is in 'disp' */
986 int disp;
987 const char * base;
988 const char * index;
989 int ss;
990 };
991
992 static const char * const db_reg[2][4][16] = {
993 {{"%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh",
994 "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b" },
995 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di",
996 "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w" },
997 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
998 "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d" },
999 { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
1000 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }},
1001
1002 {{"%al", "%cl", "%dl", "%bl", "%spl", "%bpl", "%sil", "%dil",
1003 "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b" },
1004 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di",
1005 "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w" },
1006 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
1007 "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d" },
1008 { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
1009 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }}
1010 };
1011
1012 static const char * const db_seg_reg[8] = {
1013 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
1014 };
1015
1016 /*
1017 * lengths for size attributes
1018 */
1019 static const int db_lengths[] = {
1020 1, /* BYTE */
1021 2, /* WORD */
1022 4, /* LONG */
1023 8, /* QUAD */
1024 4, /* SNGL */
1025 8, /* DBLR */
1026 10, /* EXTR */
1027 };
1028
1029 #define get_value_inc(result, loc, size, is_signed) \
1030 result = db_get_value((loc), (size), (is_signed)); \
1031 (loc) += (size);
1032
1033 static db_addr_t
1034 db_disasm_esc(db_addr_t loc, int inst, int rex, bool short_addr,
1035 int size, const char *seg);
1036 static void db_print_address(const char *seg, int size, int rex,
1037 struct i_addr *addrp);
1038 static db_addr_t
1039 db_read_address(db_addr_t loc, bool short_addr, int rex, int regmodrm,
1040 struct i_addr *addrp);
1041
1042 /*
1043 * Read address at location and return updated location.
1044 */
1045 static db_addr_t
db_read_address(db_addr_t loc,bool short_addr,int rex,int regmodrm,struct i_addr * addrp)1046 db_read_address(db_addr_t loc, bool short_addr, int rex, int regmodrm,
1047 struct i_addr *addrp)
1048 {
1049 int mod, rm, sib, index, disp, size, have_sib;
1050
1051 mod = f_mod(rex, regmodrm);
1052 rm = f_rm(rex, regmodrm);
1053
1054 if (mod == 3) {
1055 addrp->is_reg = true;
1056 addrp->disp = rm;
1057 return (loc);
1058 }
1059 addrp->is_reg = false;
1060 addrp->index = NULL;
1061
1062 if (short_addr)
1063 size = LONG;
1064 else
1065 size = QUAD;
1066
1067 if ((rm & 0x7) == 4) {
1068 get_value_inc(sib, loc, 1, false);
1069 rm = sib_base(rex, sib);
1070 index = sib_index(rex, sib);
1071 if (index != 4)
1072 addrp->index = db_reg[1][size][index];
1073 addrp->ss = sib_ss(rex, sib);
1074 have_sib = 1;
1075 } else
1076 have_sib = 0;
1077
1078 switch (mod) {
1079 case 0:
1080 if (rm == 5) {
1081 get_value_inc(addrp->disp, loc, 4, false);
1082 if (have_sib)
1083 addrp->base = NULL;
1084 else if (short_addr)
1085 addrp->base = "%eip";
1086 else
1087 addrp->base = "%rip";
1088 } else {
1089 addrp->disp = 0;
1090 addrp->base = db_reg[1][size][rm];
1091 }
1092 break;
1093
1094 case 1:
1095 get_value_inc(disp, loc, 1, true);
1096 addrp->disp = disp;
1097 addrp->base = db_reg[1][size][rm];
1098 break;
1099
1100 case 2:
1101 get_value_inc(disp, loc, 4, false);
1102 addrp->disp = disp;
1103 addrp->base = db_reg[1][size][rm];
1104 break;
1105 }
1106 return (loc);
1107 }
1108
1109 static void
db_print_address(const char * seg,int size,int rex,struct i_addr * addrp)1110 db_print_address(const char *seg, int size, int rex, struct i_addr *addrp)
1111 {
1112 if (addrp->is_reg) {
1113 db_printf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][addrp->disp]);
1114 return;
1115 }
1116
1117 if (seg) {
1118 db_printf("%s:", seg);
1119 }
1120
1121 if (addrp->disp != 0 || (addrp->base == NULL && addrp->index == NULL))
1122 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
1123 if (addrp->base != NULL || addrp->index != NULL) {
1124 db_printf("(");
1125 if (addrp->base)
1126 db_printf("%s", addrp->base);
1127 if (addrp->index)
1128 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
1129 db_printf(")");
1130 }
1131 }
1132
1133 /*
1134 * Disassemble floating-point ("escape") instruction
1135 * and return updated location.
1136 */
1137 static db_addr_t
db_disasm_esc(db_addr_t loc,int inst,int rex,bool short_addr,int size,const char * seg)1138 db_disasm_esc(db_addr_t loc, int inst, int rex, bool short_addr, int size,
1139 const char *seg)
1140 {
1141 int regmodrm;
1142 const struct finst * fp;
1143 int mod;
1144 struct i_addr address;
1145 const char * name;
1146
1147 get_value_inc(regmodrm, loc, 1, false);
1148 fp = &db_Esc_inst[inst - 0xd8][f_reg(rex, regmodrm)];
1149 mod = f_mod(rex, regmodrm);
1150 if (mod != 3) {
1151 if (*fp->f_name == '\0') {
1152 db_printf("<bad instruction>");
1153 return (loc);
1154 }
1155 /*
1156 * Normal address modes.
1157 */
1158 loc = db_read_address(loc, short_addr, rex, regmodrm, &address);
1159 db_printf("%s", fp->f_name);
1160 switch(fp->f_size) {
1161 case SNGL:
1162 db_printf("s");
1163 break;
1164 case DBLR:
1165 db_printf("l");
1166 break;
1167 case EXTR:
1168 db_printf("t");
1169 break;
1170 case WORD:
1171 db_printf("s");
1172 break;
1173 case LONG:
1174 db_printf("l");
1175 break;
1176 case QUAD:
1177 db_printf("q");
1178 break;
1179 default:
1180 break;
1181 }
1182 db_printf("\t");
1183 db_print_address(seg, BYTE, rex, &address);
1184 }
1185 else {
1186 /*
1187 * 'reg-reg' - special formats
1188 */
1189 switch (fp->f_rrmode) {
1190 case op2(ST,STI):
1191 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1192 db_printf("%s\t%%st,%%st(%d)",name,f_rm(rex, regmodrm));
1193 break;
1194 case op2(STI,ST):
1195 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1196 db_printf("%s\t%%st(%d),%%st",name, f_rm(rex, regmodrm));
1197 break;
1198 case op1(STI):
1199 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1200 db_printf("%s\t%%st(%d)",name, f_rm(rex, regmodrm));
1201 break;
1202 case op1(X):
1203 name = ((const char * const *)fp->f_rrname)[f_rm(rex, regmodrm)];
1204 if (*name == '\0')
1205 goto bad;
1206 db_printf("%s", name);
1207 break;
1208 case op1(XA):
1209 name = ((const char * const *)fp->f_rrname)[f_rm(rex, regmodrm)];
1210 if (*name == '\0')
1211 goto bad;
1212 db_printf("%s\t%%ax", name);
1213 break;
1214 default:
1215 bad:
1216 db_printf("<bad instruction>");
1217 break;
1218 }
1219 }
1220
1221 return (loc);
1222 }
1223
1224 /*
1225 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1226 * (optional) alternate format. Return address of start of
1227 * next instruction.
1228 */
1229 db_addr_t
db_disasm(db_addr_t loc,bool altfmt)1230 db_disasm(db_addr_t loc, bool altfmt)
1231 {
1232 int inst;
1233 int size;
1234 bool short_addr;
1235 const char * seg;
1236 const struct inst * ip;
1237 const char * i_name;
1238 int i_size;
1239 int i_mode;
1240 int rex = 0;
1241 int regmodrm = 0;
1242 bool first;
1243 int displ;
1244 bool prefix;
1245 bool rep, repne;
1246 int imm;
1247 int imm2;
1248 long imm64;
1249 int len;
1250 struct i_addr address;
1251
1252 get_value_inc(inst, loc, 1, false);
1253 short_addr = false;
1254 size = LONG;
1255 seg = NULL;
1256
1257 /*
1258 * Get prefixes
1259 */
1260 rep = false;
1261 repne = false;
1262 prefix = true;
1263 do {
1264 switch (inst) {
1265 case 0x66: /* data16 */
1266 size = WORD;
1267 break;
1268 case 0x67:
1269 short_addr = true;
1270 break;
1271 case 0x26:
1272 seg = "%es";
1273 break;
1274 case 0x36:
1275 seg = "%ss";
1276 break;
1277 case 0x2e:
1278 seg = "%cs";
1279 break;
1280 case 0x3e:
1281 seg = "%ds";
1282 break;
1283 case 0x64:
1284 seg = "%fs";
1285 break;
1286 case 0x65:
1287 seg = "%gs";
1288 break;
1289 case 0xf0:
1290 db_printf("lock ");
1291 break;
1292 /*
1293 * XXX repne/repe are only actually valid for MOVS, CMPS,
1294 * SCAS, LODS, STOS, INS, OUTS.
1295 */
1296 case 0xf2:
1297 repne = true;
1298 break;
1299 case 0xf3:
1300 rep = true;
1301 break;
1302 default:
1303 prefix = false;
1304 break;
1305 }
1306 if (inst >= 0x40 && inst < 0x50) {
1307 rex = inst;
1308 prefix = true;
1309 }
1310 if (prefix) {
1311 get_value_inc(inst, loc, 1, false);
1312 }
1313 } while (prefix);
1314
1315 if (inst >= 0xd8 && inst <= 0xdf) {
1316 loc = db_disasm_esc(loc, inst, rex, short_addr, size, seg);
1317 db_printf("\n");
1318 return (loc);
1319 }
1320
1321 ip = &db_inst_table[inst];
1322 while (ip->i_size == ESC) {
1323 get_value_inc(inst, loc, 1, false);
1324 ip = ((const struct inst * const *)ip->i_extra)[inst>>4];
1325 if (ip == NULL) {
1326 ip = &db_bad_inst;
1327 }
1328 else {
1329 ip = &ip[inst&0xf];
1330 }
1331 }
1332
1333 if (ip->i_has_modrm) {
1334 get_value_inc(regmodrm, loc, 1, false);
1335 loc = db_read_address(loc, short_addr, rex, regmodrm, &address);
1336 }
1337
1338 i_name = ip->i_name;
1339 i_size = ip->i_size;
1340 i_mode = ip->i_mode;
1341
1342 if (ip->i_extra == db_Grp9 && f_mod(rex, regmodrm) == 3) {
1343 ip = &db_Grp9b[f_reg(rex, regmodrm)];
1344 i_name = ip->i_name;
1345 i_size = ip->i_size;
1346 i_mode = ip->i_mode;
1347 }
1348 else if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1349 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1350 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 ||
1351 ip->i_extra == db_Grp15) {
1352 i_name = ((const char * const *)ip->i_extra)[f_reg(rex, regmodrm)];
1353 }
1354 else if (ip->i_extra == db_Grp3) {
1355 ip = ip->i_extra;
1356 ip = &ip[f_reg(rex, regmodrm)];
1357 i_name = ip->i_name;
1358 i_mode = ip->i_mode;
1359 }
1360 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1361 ip = ip->i_extra;
1362 ip = &ip[f_reg(rex, regmodrm)];
1363 i_name = ip->i_name;
1364 i_mode = ip->i_mode;
1365 i_size = ip->i_size;
1366 }
1367
1368 /* Special cases that don't fit well in the tables. */
1369 if (ip->i_extra == db_Grp7 && f_mod(rex, regmodrm) == 3) {
1370 switch (regmodrm) {
1371 case 0xc1:
1372 i_name = "vmcall";
1373 i_size = NONE;
1374 i_mode = 0;
1375 break;
1376 case 0xc2:
1377 i_name = "vmlaunch";
1378 i_size = NONE;
1379 i_mode = 0;
1380 break;
1381 case 0xc3:
1382 i_name = "vmresume";
1383 i_size = NONE;
1384 i_mode = 0;
1385 break;
1386 case 0xc4:
1387 i_name = "vmxoff";
1388 i_size = NONE;
1389 i_mode = 0;
1390 break;
1391 case 0xc8:
1392 i_name = "monitor";
1393 i_size = NONE;
1394 i_mode = 0;
1395 break;
1396 case 0xc9:
1397 i_name = "mwait";
1398 i_size = NONE;
1399 i_mode = 0;
1400 break;
1401 case 0xca:
1402 i_name = "clac";
1403 i_size = NONE;
1404 i_mode = 0;
1405 break;
1406 case 0xcb:
1407 i_name = "stac";
1408 i_size = NONE;
1409 i_mode = 0;
1410 break;
1411 case 0xd0:
1412 i_name = "xgetbv";
1413 i_size = NONE;
1414 i_mode = 0;
1415 break;
1416 case 0xd1:
1417 i_name = "xsetbv";
1418 i_size = NONE;
1419 i_mode = 0;
1420 break;
1421 case 0xd8:
1422 i_name = "vmrun";
1423 i_size = NONE;
1424 i_mode = 0;
1425 break;
1426 case 0xd9:
1427 i_name = "vmmcall";
1428 i_size = NONE;
1429 i_mode = 0;
1430 break;
1431 case 0xda:
1432 i_name = "vmload";
1433 i_size = NONE;
1434 i_mode = 0;
1435 break;
1436 case 0xdb:
1437 i_name = "vmsave";
1438 i_size = NONE;
1439 i_mode = 0;
1440 break;
1441 case 0xdc:
1442 i_name = "stgi";
1443 i_size = NONE;
1444 i_mode = 0;
1445 break;
1446 case 0xdd:
1447 i_name = "clgi";
1448 i_size = NONE;
1449 i_mode = 0;
1450 break;
1451 case 0xde:
1452 i_name = "skinit";
1453 i_size = NONE;
1454 i_mode = 0;
1455 break;
1456 case 0xdf:
1457 i_name = "invlpga";
1458 i_size = NONE;
1459 i_mode = 0;
1460 break;
1461 case 0xf8:
1462 i_name = "swapgs";
1463 i_size = NONE;
1464 i_mode = 0;
1465 break;
1466 case 0xf9:
1467 i_name = "rdtscp";
1468 i_size = NONE;
1469 i_mode = 0;
1470 break;
1471 }
1472 }
1473 if (ip->i_extra == db_Grp15 && f_mod(rex, regmodrm) == 3) {
1474 i_name = db_Grp15b[f_reg(rex, regmodrm)];
1475 i_size = NONE;
1476 i_mode = 0;
1477 }
1478
1479 /* Handle instructions identified by mandatory prefixes. */
1480 if (rep) {
1481 if (inst == 0x90) {
1482 i_name = "pause";
1483 i_size = NONE;
1484 i_mode = 0;
1485 rep = false;
1486 } else if (ip->i_extra == db_Grp9 && f_mod(rex, regmodrm) != 3 &&
1487 f_reg(rex, regmodrm) == 0x6) {
1488 i_name = "vmxon";
1489 rep = false;
1490 }
1491 }
1492 /* N.B., likely highly incomplete. */
1493 if (repne) {
1494 if (ip == &db_inst_0f38fx[0] || ip == &db_inst_0f38fx[1])
1495 repne = false;
1496 }
1497 if (size == WORD) {
1498 if (ip->i_extra == db_Grp9 && f_mod(rex, regmodrm) != 3 &&
1499 f_reg(rex, regmodrm) == 0x6) {
1500 i_name = "vmclear";
1501 }
1502 }
1503 if (rex & REX_W) {
1504 if (strcmp(i_name, "cwde") == 0)
1505 i_name = "cdqe";
1506 else if (strcmp(i_name, "cmpxchg8b") == 0)
1507 i_name = "cmpxchg16b";
1508 }
1509
1510 if (rep)
1511 db_printf("repe "); /* XXX repe VS rep */
1512 if (repne)
1513 db_printf("repne ");
1514
1515 if (i_size == SDEP) {
1516 if (size == LONG)
1517 db_printf("%s", i_name);
1518 else
1519 db_printf("%s", (const char *)ip->i_extra);
1520 } else if (i_size == ADEP) {
1521 if (!short_addr)
1522 db_printf("%s", i_name);
1523 else
1524 db_printf("%s", (const char *)ip->i_extra);
1525 }
1526 else {
1527 db_printf("%s", i_name);
1528 if ((inst >= 0x50 && inst <= 0x5f) || inst == 0x68 || inst == 0x6a) {
1529 i_size = NONE;
1530 db_printf("q");
1531 }
1532 if (i_size != NONE) {
1533 if (i_size == BYTE) {
1534 db_printf("b");
1535 size = BYTE;
1536 }
1537 else if (i_size == WORD) {
1538 db_printf("w");
1539 size = WORD;
1540 }
1541 else if (size == WORD)
1542 db_printf("w");
1543 else {
1544 if (rex & REX_W)
1545 db_printf("q");
1546 else
1547 db_printf("l");
1548 }
1549 }
1550 }
1551 db_printf("\t");
1552 for (first = true;
1553 i_mode != 0;
1554 i_mode >>= 8, first = false)
1555 {
1556 if (!first)
1557 db_printf(",");
1558
1559 switch (i_mode & 0xFF) {
1560 case E:
1561 db_print_address(seg, size, rex, &address);
1562 break;
1563
1564 case Eind:
1565 db_printf("*");
1566 db_print_address(seg, size, rex, &address);
1567 break;
1568
1569 case El:
1570 db_print_address(seg, (rex & REX_W) ? QUAD : LONG, rex, &address);
1571 break;
1572
1573 case EL:
1574 db_print_address(seg, LONG, 0, &address);
1575 break;
1576
1577 case Ew:
1578 db_print_address(seg, WORD, rex, &address);
1579 break;
1580
1581 case Eb:
1582 db_print_address(seg, BYTE, rex, &address);
1583 break;
1584
1585 case R:
1586 db_printf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][f_reg(rex, regmodrm)]);
1587 break;
1588
1589 case Rw:
1590 db_printf("%s", db_reg[rex != 0 ? 1 : 0][WORD][f_reg(rex, regmodrm)]);
1591 break;
1592
1593 case Rq:
1594 db_printf("%s", db_reg[rex != 0 ? 1 : 0][QUAD][f_reg(rex, regmodrm)]);
1595 break;
1596
1597 case Ri:
1598 db_printf("%s", db_reg[0][QUAD][f_rm(rex, inst)]);
1599 break;
1600
1601 case Ril:
1602 db_printf("%s", db_reg[rex != 0 ? 1 : 0][(rex & REX_R) ? QUAD : LONG][f_rm(rex, inst)]);
1603 break;
1604
1605 case Rv:
1606 db_printf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][f_rm(rex, regmodrm)]);
1607 break;
1608
1609 case S:
1610 db_printf("%s", db_seg_reg[f_reg(rex, regmodrm)]);
1611 break;
1612
1613 case Si:
1614 db_printf("%s", db_seg_reg[f_reg(rex, inst)]);
1615 break;
1616
1617 case A:
1618 db_printf("%s", db_reg[rex != 0 ? 1 : 0][size][0]); /* acc */
1619 break;
1620
1621 case BX:
1622 if (seg)
1623 db_printf("%s:", seg);
1624 db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1625 break;
1626
1627 case CL:
1628 db_printf("%%cl");
1629 break;
1630
1631 case DX:
1632 db_printf("%%dx");
1633 break;
1634
1635 case SI:
1636 if (seg)
1637 db_printf("%s:", seg);
1638 db_printf("(%s)", short_addr ? "%si" : "%rsi");
1639 break;
1640
1641 case DI:
1642 db_printf("%%es:(%s)", short_addr ? "%di" : "%rdi");
1643 break;
1644
1645 case CR:
1646 db_printf("%%cr%d", f_reg(rex, regmodrm));
1647 break;
1648
1649 case DR:
1650 db_printf("%%dr%d", f_reg(rex, regmodrm));
1651 break;
1652
1653 case TR:
1654 db_printf("%%tr%d", f_reg(rex, regmodrm));
1655 break;
1656
1657 case I:
1658 len = db_lengths[size];
1659 get_value_inc(imm, loc, len, false);
1660 db_printf("$%#r", imm);
1661 break;
1662
1663 case Is:
1664 len = db_lengths[(size == LONG && (rex & REX_W)) ? QUAD : size];
1665 get_value_inc(imm, loc, len, false);
1666 db_printf("$%+#r", imm);
1667 break;
1668
1669 case Ib:
1670 get_value_inc(imm, loc, 1, false);
1671 db_printf("$%#r", imm);
1672 break;
1673
1674 case Iba:
1675 get_value_inc(imm, loc, 1, false);
1676 if (imm != 0x0a)
1677 db_printf("$%#r", imm);
1678 break;
1679
1680 case Ibs:
1681 get_value_inc(imm, loc, 1, true);
1682 if (size == WORD)
1683 imm &= 0xFFFF;
1684 db_printf("$%+#r", imm);
1685 break;
1686
1687 case Iw:
1688 get_value_inc(imm, loc, 2, false);
1689 db_printf("$%#r", imm);
1690 break;
1691
1692 case Ilq:
1693 len = db_lengths[rex & REX_W ? QUAD : LONG];
1694 get_value_inc(imm64, loc, len, false);
1695 db_printf("$%#lr", imm64);
1696 break;
1697
1698 case O:
1699 len = (short_addr ? 2 : 4);
1700 get_value_inc(displ, loc, len, false);
1701 if (seg)
1702 db_printf("%s:%+#r",seg, displ);
1703 else
1704 db_printsym((db_addr_t)displ, DB_STGY_ANY);
1705 break;
1706
1707 case Db:
1708 get_value_inc(displ, loc, 1, true);
1709 displ += loc;
1710 if (size == WORD)
1711 displ &= 0xFFFF;
1712 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1713 break;
1714
1715 case Dl:
1716 len = db_lengths[(size == LONG && (rex & REX_W)) ? QUAD : size];
1717 get_value_inc(displ, loc, len, false);
1718 displ += loc;
1719 if (size == WORD)
1720 displ &= 0xFFFF;
1721 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1722 break;
1723
1724 case o1:
1725 db_printf("$1");
1726 break;
1727
1728 case o3:
1729 db_printf("$3");
1730 break;
1731
1732 case OS:
1733 len = db_lengths[size];
1734 get_value_inc(imm, loc, len, false); /* offset */
1735 get_value_inc(imm2, loc, 2, false); /* segment */
1736 db_printf("$%#r,%#r", imm2, imm);
1737 break;
1738 }
1739 }
1740 db_printf("\n");
1741 return (loc);
1742 }
1743