1 /*-
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 */
26
27 /*
28 * Instruction disassembler.
29 */
30
31 #include <stdbool.h>
32 #include <stdint.h>
33 #include <string.h>
34
35 #include <sys/kassert.h>
36 #include <sys/kdebug.h>
37
38 /*
39 * Missing from headers
40 */
41 #define DB_STGY_ANY 0
42 #define DB_STGY_XTRN 1
43 #define DB_STGY_PROC 2
44 #define TRUE 1
45 #define FALSE 0
46
47 /*
48 * Size attributes
49 */
50 #define BYTE 0
51 #define WORD 1
52 #define LONG 2
53 #define QUAD 3
54 #define SNGL 4
55 #define DBLR 5
56 #define EXTR 6
57 #define SDEP 7
58 #define ADEP 8
59 #define ESC 9
60 #define NONE 10
61
62 /*
63 * REX prefix and bits
64 */
65 #define REX_B 1
66 #define REX_X 2
67 #define REX_R 4
68 #define REX_W 8
69 #define REX 0x40
70
71 /*
72 * Addressing modes
73 */
74 #define E 1 /* general effective address */
75 #define Eind 2 /* indirect address (jump, call) */
76 #define Ew 3 /* address, word size */
77 #define Eb 4 /* address, byte size */
78 #define R 5 /* register, in 'reg' field */
79 #define Rw 6 /* word register, in 'reg' field */
80 #define Rq 39 /* quad register, in 'reg' field */
81 #define Ri 7 /* register in instruction */
82 #define S 8 /* segment reg, in 'reg' field */
83 #define Si 9 /* segment reg, in instruction */
84 #define A 10 /* accumulator */
85 #define BX 11 /* (bx) */
86 #define CL 12 /* cl, for shifts */
87 #define DX 13 /* dx, for IO */
88 #define SI 14 /* si */
89 #define DI 15 /* di */
90 #define CR 16 /* control register */
91 #define DR 17 /* debug register */
92 #define TR 18 /* test register */
93 #define I 19 /* immediate, unsigned */
94 #define Is 20 /* immediate, signed */
95 #define Ib 21 /* byte immediate, unsigned */
96 #define Ibs 22 /* byte immediate, signed */
97 #define Iw 23 /* word immediate, unsigned */
98 #define Ilq 24 /* long/quad immediate, unsigned */
99 #define O 25 /* direct address */
100 #define Db 26 /* byte displacement from EIP */
101 #define Dl 27 /* long displacement from EIP */
102 #define o1 28 /* constant 1 */
103 #define o3 29 /* constant 3 */
104 #define OS 30 /* immediate offset/segment */
105 #define ST 31 /* FP stack top */
106 #define STI 32 /* FP stack */
107 #define X 33 /* extended FP op */
108 #define XA 34 /* for 'fstcw %ax' */
109 #define El 35 /* address, long/quad size */
110 #define Ril 36 /* long register in instruction */
111 #define Iba 37 /* byte immediate, don't print if 0xa */
112 #define EL 38 /* address, explicitly long size */
113
114 struct inst {
115 const char * i_name; /* name */
116 short i_has_modrm; /* has regmodrm byte */
117 short i_size; /* operand size */
118 int i_mode; /* addressing modes */
119 const void * i_extra; /* pointer to extra opcode table */
120 };
121
122 #define op1(x) (x)
123 #define op2(x,y) ((x)|((y)<<8))
124 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
125
126 struct finst {
127 const char * f_name; /* name for memory instruction */
128 int f_size; /* size for memory instruction */
129 int f_rrmode; /* mode for rr instruction */
130 const void * f_rrname; /* name for rr instruction
131 (or pointer to table) */
132 };
133
134 static const struct inst db_inst_0f388x[] = {
135 /*80*/ { "", TRUE, SDEP, op2(E, Rq), "invept" },
136 /*81*/ { "", TRUE, SDEP, op2(E, Rq), "invvpid" },
137 /*82*/ { "", TRUE, SDEP, op2(E, Rq), "invpcid" },
138 /*83*/ { "", FALSE, NONE, 0, 0 },
139 /*84*/ { "", FALSE, NONE, 0, 0 },
140 /*85*/ { "", FALSE, NONE, 0, 0 },
141 /*86*/ { "", FALSE, NONE, 0, 0 },
142 /*87*/ { "", FALSE, NONE, 0, 0 },
143
144 /*88*/ { "", FALSE, NONE, 0, 0 },
145 /*89*/ { "", FALSE, NONE, 0, 0 },
146 /*8a*/ { "", FALSE, NONE, 0, 0 },
147 /*8b*/ { "", FALSE, NONE, 0, 0 },
148 /*8c*/ { "", FALSE, NONE, 0, 0 },
149 /*8d*/ { "", FALSE, NONE, 0, 0 },
150 /*8e*/ { "", FALSE, NONE, 0, 0 },
151 /*8f*/ { "", FALSE, NONE, 0, 0 },
152 };
153
154 static const struct inst * const db_inst_0f38[] = {
155 0,
156 0,
157 0,
158 0,
159 0,
160 0,
161 0,
162 0,
163 db_inst_0f388x,
164 0,
165 0,
166 0,
167 0,
168 0,
169 0,
170 0
171 };
172
173 static const char * const db_Grp6[] = {
174 "sldt",
175 "str",
176 "lldt",
177 "ltr",
178 "verr",
179 "verw",
180 "",
181 ""
182 };
183
184 static const char * const db_Grp7[] = {
185 "sgdt",
186 "sidt",
187 "lgdt",
188 "lidt",
189 "smsw",
190 "",
191 "lmsw",
192 "invlpg"
193 };
194
195 static const char * const db_Grp8[] = {
196 "",
197 "",
198 "",
199 "",
200 "bt",
201 "bts",
202 "btr",
203 "btc"
204 };
205
206 static const char * const db_Grp9[] = {
207 "",
208 "cmpxchg8b",
209 "",
210 "",
211 "",
212 "",
213 "vmptrld",
214 "vmptrst"
215 };
216
217 static const char * const db_Grp15[] = {
218 "fxsave",
219 "fxrstor",
220 "ldmxcsr",
221 "stmxcsr",
222 "xsave",
223 "xrstor",
224 "xsaveopt",
225 "clflush"
226 };
227
228 static const char * const db_Grp15b[] = {
229 "",
230 "",
231 "",
232 "",
233 "",
234 "lfence",
235 "mfence",
236 "sfence"
237 };
238
239 static const struct inst db_inst_0f0x[] = {
240 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 },
241 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 },
242 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
243 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
244 /*04*/ { "", FALSE, NONE, 0, 0 },
245 /*05*/ { "syscall",FALSE,NONE, 0, 0 },
246 /*06*/ { "clts", FALSE, NONE, 0, 0 },
247 /*07*/ { "sysret",FALSE, NONE, 0, 0 },
248
249 /*08*/ { "invd", FALSE, NONE, 0, 0 },
250 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
251 /*0a*/ { "", FALSE, NONE, 0, 0 },
252 /*0b*/ { "", FALSE, NONE, 0, 0 },
253 /*0c*/ { "", FALSE, NONE, 0, 0 },
254 /*0d*/ { "", FALSE, NONE, 0, 0 },
255 /*0e*/ { "", FALSE, NONE, 0, 0 },
256 /*0f*/ { "", FALSE, NONE, 0, 0 },
257 };
258
259 static const struct inst db_inst_0f2x[] = {
260 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 },
261 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 },
262 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 },
263 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 },
264 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 },
265 /*25*/ { "", FALSE, NONE, 0, 0 },
266 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 },
267 /*27*/ { "", FALSE, NONE, 0, 0 },
268
269 /*28*/ { "", FALSE, NONE, 0, 0 },
270 /*29*/ { "", FALSE, NONE, 0, 0 },
271 /*2a*/ { "", FALSE, NONE, 0, 0 },
272 /*2b*/ { "", FALSE, NONE, 0, 0 },
273 /*2c*/ { "", FALSE, NONE, 0, 0 },
274 /*2d*/ { "", FALSE, NONE, 0, 0 },
275 /*2e*/ { "", FALSE, NONE, 0, 0 },
276 /*2f*/ { "", FALSE, NONE, 0, 0 },
277 };
278
279 static const struct inst db_inst_0f3x[] = {
280 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 },
281 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 },
282 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 },
283 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 },
284 /*34*/ { "sysenter",FALSE,NONE, 0, 0 },
285 /*35*/ { "sysexit",FALSE,NONE, 0, 0 },
286 /*36*/ { "", FALSE, NONE, 0, 0 },
287 /*37*/ { "getsec",FALSE, NONE, 0, 0 },
288
289 /*38*/ { "", FALSE, ESC, 0, db_inst_0f38 },
290 /*39*/ { "", FALSE, NONE, 0, 0 },
291 /*3a*/ { "", FALSE, NONE, 0, 0 },
292 /*3b*/ { "", FALSE, NONE, 0, 0 },
293 /*3c*/ { "", FALSE, NONE, 0, 0 },
294 /*3d*/ { "", FALSE, NONE, 0, 0 },
295 /*3e*/ { "", FALSE, NONE, 0, 0 },
296 /*3f*/ { "", FALSE, NONE, 0, 0 },
297 };
298
299 static const struct inst db_inst_0f4x[] = {
300 /*40*/ { "cmovo", TRUE, NONE, op2(E, R), 0 },
301 /*41*/ { "cmovno", TRUE, NONE, op2(E, R), 0 },
302 /*42*/ { "cmovb", TRUE, NONE, op2(E, R), 0 },
303 /*43*/ { "cmovnb", TRUE, NONE, op2(E, R), 0 },
304 /*44*/ { "cmovz", TRUE, NONE, op2(E, R), 0 },
305 /*45*/ { "cmovnz", TRUE, NONE, op2(E, R), 0 },
306 /*46*/ { "cmovbe", TRUE, NONE, op2(E, R), 0 },
307 /*47*/ { "cmovnbe",TRUE, NONE, op2(E, R), 0 },
308
309 /*48*/ { "cmovs", TRUE, NONE, op2(E, R), 0 },
310 /*49*/ { "cmovns", TRUE, NONE, op2(E, R), 0 },
311 /*4a*/ { "cmovp", TRUE, NONE, op2(E, R), 0 },
312 /*4b*/ { "cmovnp", TRUE, NONE, op2(E, R), 0 },
313 /*4c*/ { "cmovl", TRUE, NONE, op2(E, R), 0 },
314 /*4d*/ { "cmovnl", TRUE, NONE, op2(E, R), 0 },
315 /*4e*/ { "cmovle", TRUE, NONE, op2(E, R), 0 },
316 /*4f*/ { "cmovnle",TRUE, NONE, op2(E, R), 0 },
317 };
318
319 static const struct inst db_inst_0f7x[] = {
320 /*70*/ { "", FALSE, NONE, 0, 0 },
321 /*71*/ { "", FALSE, NONE, 0, 0 },
322 /*72*/ { "", FALSE, NONE, 0, 0 },
323 /*73*/ { "", FALSE, NONE, 0, 0 },
324 /*74*/ { "", FALSE, NONE, 0, 0 },
325 /*75*/ { "", FALSE, NONE, 0, 0 },
326 /*76*/ { "", FALSE, NONE, 0, 0 },
327 /*77*/ { "", FALSE, NONE, 0, 0 },
328
329 /*78*/ { "vmread", TRUE, NONE, op2(Rq, E), 0 },
330 /*79*/ { "vmwrite",TRUE, NONE, op2(E, Rq), 0 },
331 /*7a*/ { "", FALSE, NONE, 0, 0 },
332 /*7b*/ { "", FALSE, NONE, 0, 0 },
333 /*7c*/ { "", FALSE, NONE, 0, 0 },
334 /*7d*/ { "", FALSE, NONE, 0, 0 },
335 /*7e*/ { "", FALSE, NONE, 0, 0 },
336 /*7f*/ { "", FALSE, NONE, 0, 0 },
337 };
338
339 static const struct inst db_inst_0f8x[] = {
340 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
341 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
342 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
343 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
344 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
345 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
346 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
347 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
348
349 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
350 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
351 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
352 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
353 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
354 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
355 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
356 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
357 };
358
359 static const struct inst db_inst_0f9x[] = {
360 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
361 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
362 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
363 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
364 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
365 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
366 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
367 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
368
369 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
370 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
371 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
372 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
373 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
374 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
375 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
376 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
377 };
378
379 static const struct inst db_inst_0fax[] = {
380 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
381 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
382 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 },
383 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 },
384 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 },
385 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 },
386 /*a6*/ { "", FALSE, NONE, 0, 0 },
387 /*a7*/ { "", FALSE, NONE, 0, 0 },
388
389 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
390 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
391 /*aa*/ { "rsm", FALSE, NONE, 0, 0 },
392 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 },
393 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 },
394 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 },
395 /*ae*/ { "", TRUE, LONG, op1(E), db_Grp15 },
396 /*af*/ { "imul", TRUE, LONG, op2(E,R), 0 },
397 };
398
399 static const struct inst db_inst_0fbx[] = {
400 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
401 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
402 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
403 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 },
404 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
405 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
406 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 },
407 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 },
408
409 /*b8*/ { "", FALSE, NONE, 0, 0 },
410 /*b9*/ { "", FALSE, NONE, 0, 0 },
411 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 },
412 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
413 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
414 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
415 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 },
416 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 },
417 };
418
419 static const struct inst db_inst_0fcx[] = {
420 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
421 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
422 /*c2*/ { "", FALSE, NONE, 0, 0 },
423 /*c3*/ { "", FALSE, NONE, 0, 0 },
424 /*c4*/ { "", FALSE, NONE, 0, 0 },
425 /*c5*/ { "", FALSE, NONE, 0, 0 },
426 /*c6*/ { "", FALSE, NONE, 0, 0 },
427 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 },
428 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
429 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
430 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
431 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
432 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
433 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
434 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
435 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
436 };
437
438 static const struct inst * const db_inst_0f[] = {
439 db_inst_0f0x,
440 0,
441 db_inst_0f2x,
442 db_inst_0f3x,
443 db_inst_0f4x,
444 0,
445 0,
446 db_inst_0f7x,
447 db_inst_0f8x,
448 db_inst_0f9x,
449 db_inst_0fax,
450 db_inst_0fbx,
451 db_inst_0fcx,
452 0,
453 0,
454 0
455 };
456
457 static const char * const db_Esc92[] = {
458 "fnop", "", "", "", "", "", "", ""
459 };
460 static const char * const db_Esc94[] = {
461 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
462 };
463 static const char * const db_Esc95[] = {
464 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
465 };
466 static const char * const db_Esc96[] = {
467 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
468 "fincstp"
469 };
470 static const char * const db_Esc97[] = {
471 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
472 };
473
474 static const char * const db_Esca5[] = {
475 "", "fucompp","", "", "", "", "", ""
476 };
477
478 static const char * const db_Escb4[] = {
479 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
480 };
481
482 static const char * const db_Esce3[] = {
483 "", "fcompp","", "", "", "", "", ""
484 };
485
486 static const char * const db_Escf4[] = {
487 "fnstsw","", "", "", "", "", "", ""
488 };
489
490 static const struct finst db_Esc8[] = {
491 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
492 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
493 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
494 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
495 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
496 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
497 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
498 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
499 };
500
501 static const struct finst db_Esc9[] = {
502 /*0*/ { "fld", SNGL, op1(STI), 0 },
503 /*1*/ { "", NONE, op1(STI), "fxch" },
504 /*2*/ { "fst", SNGL, op1(X), db_Esc92 },
505 /*3*/ { "fstp", SNGL, 0, 0 },
506 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
507 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
508 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
509 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
510 };
511
512 static const struct finst db_Esca[] = {
513 /*0*/ { "fiadd", LONG, 0, 0 },
514 /*1*/ { "fimul", LONG, 0, 0 },
515 /*2*/ { "ficom", LONG, 0, 0 },
516 /*3*/ { "ficomp", LONG, 0, 0 },
517 /*4*/ { "fisub", LONG, 0, 0 },
518 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
519 /*6*/ { "fidiv", LONG, 0, 0 },
520 /*7*/ { "fidivr", LONG, 0, 0 }
521 };
522
523 static const struct finst db_Escb[] = {
524 /*0*/ { "fild", LONG, 0, 0 },
525 /*1*/ { "", NONE, 0, 0 },
526 /*2*/ { "fist", LONG, 0, 0 },
527 /*3*/ { "fistp", LONG, 0, 0 },
528 /*4*/ { "", WORD, op1(X), db_Escb4 },
529 /*5*/ { "fld", EXTR, 0, 0 },
530 /*6*/ { "", WORD, 0, 0 },
531 /*7*/ { "fstp", EXTR, 0, 0 },
532 };
533
534 static const struct finst db_Escc[] = {
535 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
536 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
537 /*2*/ { "fcom", DBLR, 0, 0 },
538 /*3*/ { "fcomp", DBLR, 0, 0 },
539 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
540 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
541 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
542 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
543 };
544
545 static const struct finst db_Escd[] = {
546 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
547 /*1*/ { "", NONE, 0, 0 },
548 /*2*/ { "fst", DBLR, op1(STI), 0 },
549 /*3*/ { "fstp", DBLR, op1(STI), 0 },
550 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
551 /*5*/ { "", NONE, op1(STI), "fucomp" },
552 /*6*/ { "fnsave", NONE, 0, 0 },
553 /*7*/ { "fnstsw", NONE, 0, 0 },
554 };
555
556 static const struct finst db_Esce[] = {
557 /*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" },
558 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
559 /*2*/ { "ficom", WORD, 0, 0 },
560 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
561 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
562 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
563 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
564 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
565 };
566
567 static const struct finst db_Escf[] = {
568 /*0*/ { "fild", WORD, 0, 0 },
569 /*1*/ { "", NONE, 0, 0 },
570 /*2*/ { "fist", WORD, 0, 0 },
571 /*3*/ { "fistp", WORD, 0, 0 },
572 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
573 /*5*/ { "fild", QUAD, 0, 0 },
574 /*6*/ { "fbstp", NONE, 0, 0 },
575 /*7*/ { "fistp", QUAD, 0, 0 },
576 };
577
578 static const struct finst * const db_Esc_inst[] = {
579 db_Esc8, db_Esc9, db_Esca, db_Escb,
580 db_Escc, db_Escd, db_Esce, db_Escf
581 };
582
583 static const char * const db_Grp1[] = {
584 "add",
585 "or",
586 "adc",
587 "sbb",
588 "and",
589 "sub",
590 "xor",
591 "cmp"
592 };
593
594 static const char * const db_Grp2[] = {
595 "rol",
596 "ror",
597 "rcl",
598 "rcr",
599 "shl",
600 "shr",
601 "shl",
602 "sar"
603 };
604
605 static const struct inst db_Grp3[] = {
606 { "test", TRUE, NONE, op2(I,E), 0 },
607 { "test", TRUE, NONE, op2(I,E), 0 },
608 { "not", TRUE, NONE, op1(E), 0 },
609 { "neg", TRUE, NONE, op1(E), 0 },
610 { "mul", TRUE, NONE, op2(E,A), 0 },
611 { "imul", TRUE, NONE, op2(E,A), 0 },
612 { "div", TRUE, NONE, op2(E,A), 0 },
613 { "idiv", TRUE, NONE, op2(E,A), 0 },
614 };
615
616 static const struct inst db_Grp4[] = {
617 { "inc", TRUE, BYTE, op1(E), 0 },
618 { "dec", TRUE, BYTE, op1(E), 0 },
619 { "", TRUE, NONE, 0, 0 },
620 { "", TRUE, NONE, 0, 0 },
621 { "", TRUE, NONE, 0, 0 },
622 { "", TRUE, NONE, 0, 0 },
623 { "", TRUE, NONE, 0, 0 },
624 { "", TRUE, NONE, 0, 0 }
625 };
626
627 static const struct inst db_Grp5[] = {
628 { "inc", TRUE, LONG, op1(E), 0 },
629 { "dec", TRUE, LONG, op1(E), 0 },
630 { "call", TRUE, LONG, op1(Eind),0 },
631 { "lcall", TRUE, LONG, op1(Eind),0 },
632 { "jmp", TRUE, LONG, op1(Eind),0 },
633 { "ljmp", TRUE, LONG, op1(Eind),0 },
634 { "push", TRUE, LONG, op1(E), 0 },
635 { "", TRUE, NONE, 0, 0 }
636 };
637
638 static const struct inst db_inst_table[256] = {
639 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
640 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
641 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
642 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
643 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 },
644 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
645 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
646 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
647
648 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
649 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
650 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
651 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
652 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
653 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
654 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
655 /*0f*/ { "", FALSE, ESC, 0, db_inst_0f },
656
657 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
658 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
659 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
660 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
661 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 },
662 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
663 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
664 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
665
666 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
667 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
668 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
669 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
670 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 },
671 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
672 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
673 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
674
675 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
676 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
677 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
678 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
679 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
680 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
681 /*26*/ { "", FALSE, NONE, 0, 0 },
682 /*27*/ { "daa", FALSE, NONE, 0, 0 },
683
684 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
685 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
686 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
687 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
688 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 },
689 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
690 /*2e*/ { "", FALSE, NONE, 0, 0 },
691 /*2f*/ { "das", FALSE, NONE, 0, 0 },
692
693 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
694 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
695 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
696 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
697 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
698 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
699 /*36*/ { "", FALSE, NONE, 0, 0 },
700 /*37*/ { "aaa", FALSE, NONE, 0, 0 },
701
702 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
703 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
704 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
705 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
706 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 },
707 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
708 /*3e*/ { "", FALSE, NONE, 0, 0 },
709 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
710
711 /*40*/ { "rex", FALSE, NONE, 0, 0 },
712 /*41*/ { "rex.b", FALSE, NONE, 0, 0 },
713 /*42*/ { "rex.x", FALSE, NONE, 0, 0 },
714 /*43*/ { "rex.xb", FALSE, NONE, 0, 0 },
715 /*44*/ { "rex.r", FALSE, NONE, 0, 0 },
716 /*45*/ { "rex.rb", FALSE, NONE, 0, 0 },
717 /*46*/ { "rex.rx", FALSE, NONE, 0, 0 },
718 /*47*/ { "rex.rxb", FALSE, NONE, 0, 0 },
719
720 /*48*/ { "rex.w", FALSE, NONE, 0, 0 },
721 /*49*/ { "rex.wb", FALSE, NONE, 0, 0 },
722 /*4a*/ { "rex.wx", FALSE, NONE, 0, 0 },
723 /*4b*/ { "rex.wxb", FALSE, NONE, 0, 0 },
724 /*4c*/ { "rex.wr", FALSE, NONE, 0, 0 },
725 /*4d*/ { "rex.wrb", FALSE, NONE, 0, 0 },
726 /*4e*/ { "rex.wrx", FALSE, NONE, 0, 0 },
727 /*4f*/ { "rex.wrxb", FALSE, NONE, 0, 0 },
728
729 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
730 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
731 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
732 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
733 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
734 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
735 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
736 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
737
738 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
739 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
740 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
741 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
742 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
743 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
744 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
745 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
746
747 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
748 /*61*/ { "popa", FALSE, LONG, 0, 0 },
749 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
750 /*63*/ { "movslq", TRUE, NONE, op2(EL,R), 0 },
751
752 /*64*/ { "", FALSE, NONE, 0, 0 },
753 /*65*/ { "", FALSE, NONE, 0, 0 },
754 /*66*/ { "", FALSE, NONE, 0, 0 },
755 /*67*/ { "", FALSE, NONE, 0, 0 },
756
757 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
758 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
759 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 },
760 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
761 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
762 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
763 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
764 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
765
766 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
767 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
768 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
769 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
770 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
771 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
772 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
773 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
774
775 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
776 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
777 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
778 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
779 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
780 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
781 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
782 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
783
784 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
785 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 },
786 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
787 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 },
788 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
789 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
790 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
791 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
792
793 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
794 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
795 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
796 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
797 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
798 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
799 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
800 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
801
802 /*90*/ { "nop", FALSE, NONE, 0, 0 },
803 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
804 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
805 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
806 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
807 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
808 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
809 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
810
811 /*98*/ { "cwde", FALSE, SDEP, 0, "cbw" },
812 /*99*/ { "cdq", FALSE, SDEP, 0, "cwd" },
813 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
814 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
815 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
816 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
817 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
818 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
819
820 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
821 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
822 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
823 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
824 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
825 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
826 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
827 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
828
829 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
830 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
831 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
832 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
833 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
834 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
835 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
836 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
837
838 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
839 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
840 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
841 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
842 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
843 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
844 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
845 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
846
847 /*b8*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
848 /*b9*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
849 /*ba*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
850 /*bb*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
851 /*bc*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
852 /*bd*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
853 /*be*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
854 /*bf*/ { "mov", FALSE, LONG, op2(Ilq, Ri), 0 },
855
856 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 },
857 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 },
858 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
859 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
860 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
861 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
862 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
863 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
864
865 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 },
866 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
867 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
868 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
869 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
870 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
871 /*ce*/ { "into", FALSE, NONE, 0, 0 },
872 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
873
874 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 },
875 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 },
876 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 },
877 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 },
878 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 },
879 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 },
880 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 },
881 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
882
883 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 },
884 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 },
885 /*da*/ { "", TRUE, NONE, 0, db_Esca },
886 /*db*/ { "", TRUE, NONE, 0, db_Escb },
887 /*dc*/ { "", TRUE, NONE, 0, db_Escc },
888 /*dd*/ { "", TRUE, NONE, 0, db_Escd },
889 /*de*/ { "", TRUE, NONE, 0, db_Esce },
890 /*df*/ { "", TRUE, NONE, 0, db_Escf },
891
892 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
893 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
894 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
895 /*e3*/ { "jrcxz", FALSE, ADEP, op1(Db), "jecxz" },
896 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
897 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
898 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
899 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
900
901 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
902 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
903 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
904 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
905 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
906 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
907 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
908 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
909
910 /*f0*/ { "", FALSE, NONE, 0, 0 },
911 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 },
912 /*f2*/ { "", FALSE, NONE, 0, 0 },
913 /*f3*/ { "", FALSE, NONE, 0, 0 },
914 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
915 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
916 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 },
917 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 },
918
919 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
920 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
921 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
922 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
923 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
924 /*fd*/ { "std", FALSE, NONE, 0, 0 },
925 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 },
926 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 },
927 };
928
929 static const struct inst db_bad_inst =
930 { "???", FALSE, NONE, 0, 0 }
931 ;
932
933 #define f_mod(rex, byte) ((byte)>>6)
934 #define f_reg(rex, byte) ((((byte)>>3)&0x7) | (rex & REX_R ? 0x8 : 0x0))
935 #define f_rm(rex, byte) (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
936
937 #define sib_ss(rex, byte) ((byte)>>6)
938 #define sib_index(rex, byte) ((((byte)>>3)&0x7) | (rex & REX_X ? 0x8 : 0x0))
939 #define sib_base(rex, byte) (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
940
941 struct i_addr {
942 int is_reg; /* if reg, reg number is in 'disp' */
943 int disp;
944 const char * base;
945 const char * index;
946 int ss;
947 };
948
949 static const char * const db_reg[2][4][16] = {
950
951 {{"%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh",
952 "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b" },
953 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di",
954 "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w" },
955 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
956 "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d" },
957 { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
958 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }},
959
960 {{"%al", "%cl", "%dl", "%bl", "%spl", "%bpl", "%sil", "%dil",
961 "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b" },
962 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di",
963 "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w" },
964 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
965 "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d" },
966 { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
967 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }}
968 };
969
970 static const char * const db_seg_reg[8] = {
971 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
972 };
973
974 /*
975 * lengths for size attributes
976 */
977 static const int db_lengths[] = {
978 1, /* BYTE */
979 2, /* WORD */
980 4, /* LONG */
981 8, /* QUAD */
982 4, /* SNGL */
983 8, /* DBLR */
984 10, /* EXTR */
985 };
986
987 #define get_value_inc(result, loc, size, is_signed) \
988 result = Debug_GetValue((loc), (size), (is_signed)); \
989 (loc) += (size);
990
991 static uintptr_t
992 db_disasm_esc(uintptr_t loc, int inst, int rex, int short_addr,
993 int size, const char *seg);
994 static void db_print_address(const char *seg, int size, int rex,
995 struct i_addr *addrp);
996 static uintptr_t
997 db_read_address(uintptr_t loc, int short_addr, int rex, int regmodrm,
998 struct i_addr *addrp);
999
1000 /*
1001 * Read address at location and return updated location.
1002 */
1003 static uintptr_t
db_read_address(uintptr_t loc,int short_addr,int rex,int regmodrm,struct i_addr * addrp)1004 db_read_address(uintptr_t loc, int short_addr, int rex, int regmodrm, struct i_addr *addrp)
1005 {
1006 int mod, rm, sib, index, disp, size, have_sib;
1007
1008 mod = f_mod(rex, regmodrm);
1009 rm = f_rm(rex, regmodrm);
1010
1011 if (mod == 3) {
1012 addrp->is_reg = TRUE;
1013 addrp->disp = rm;
1014 return (loc);
1015 }
1016 addrp->is_reg = FALSE;
1017 addrp->index = 0;
1018
1019 if (short_addr)
1020 size = LONG;
1021 else
1022 size = QUAD;
1023
1024 if ((rm & 0x7) == 4) {
1025 get_value_inc(sib, loc, 1, FALSE);
1026 rm = sib_base(rex, sib);
1027 index = sib_index(rex, sib);
1028 if (index != 4)
1029 addrp->index = db_reg[1][size][index];
1030 addrp->ss = sib_ss(rex, sib);
1031 have_sib = 1;
1032 } else
1033 have_sib = 0;
1034
1035 switch (mod) {
1036 case 0:
1037 if (rm == 5) {
1038 get_value_inc(addrp->disp, loc, 4, FALSE);
1039 if (have_sib)
1040 addrp->base = 0;
1041 else if (short_addr)
1042 addrp->base = "%eip";
1043 else
1044 addrp->base = "%rip";
1045 } else {
1046 addrp->disp = 0;
1047 addrp->base = db_reg[1][size][rm];
1048 }
1049 break;
1050
1051 case 1:
1052 get_value_inc(disp, loc, 1, TRUE);
1053 addrp->disp = disp;
1054 addrp->base = db_reg[1][size][rm];
1055 break;
1056
1057 case 2:
1058 get_value_inc(disp, loc, 4, FALSE);
1059 addrp->disp = disp;
1060 addrp->base = db_reg[1][size][rm];
1061 break;
1062 }
1063 return (loc);
1064 }
1065
1066 static void
db_print_address(const char * seg,int size,int rex,struct i_addr * addrp)1067 db_print_address(const char *seg, int size, int rex, struct i_addr *addrp)
1068 {
1069 if (addrp->is_reg) {
1070 kprintf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][addrp->disp]);
1071 return;
1072 }
1073
1074 if (seg) {
1075 kprintf("%s:", seg);
1076 }
1077
1078 if (addrp->disp != 0 || (addrp->base == 0 && addrp->index == 0))
1079 Debug_PrintSymbol((uintptr_t)addrp->disp, DB_STGY_ANY);
1080 if (addrp->base != 0 || addrp->index != 0) {
1081 kprintf("(");
1082 if (addrp->base)
1083 kprintf("%s", addrp->base);
1084 if (addrp->index)
1085 kprintf(",%s,%d", addrp->index, 1<<addrp->ss);
1086 kprintf(")");
1087 }
1088 }
1089
1090 /*
1091 * Disassemble floating-point ("escape") instruction
1092 * and return updated location.
1093 */
1094 static uintptr_t
db_disasm_esc(uintptr_t loc,int inst,int rex,int short_addr,int size,const char * seg)1095 db_disasm_esc(uintptr_t loc, int inst, int rex, int short_addr, int size, const char *seg)
1096 {
1097 int regmodrm;
1098 const struct finst * fp;
1099 int mod;
1100 struct i_addr address;
1101 const char * name;
1102
1103 get_value_inc(regmodrm, loc, 1, FALSE);
1104 fp = &db_Esc_inst[inst - 0xd8][f_reg(rex, regmodrm)];
1105 mod = f_mod(rex, regmodrm);
1106 if (mod != 3) {
1107 if (*fp->f_name == '\0') {
1108 kprintf("<bad instruction>");
1109 return (loc);
1110 }
1111 /*
1112 * Normal address modes.
1113 */
1114 loc = db_read_address(loc, short_addr, rex, regmodrm, &address);
1115 kprintf("%s", fp->f_name);
1116 switch(fp->f_size) {
1117 case SNGL:
1118 kprintf("s");
1119 break;
1120 case DBLR:
1121 kprintf("l");
1122 break;
1123 case EXTR:
1124 kprintf("t");
1125 break;
1126 case WORD:
1127 kprintf("s");
1128 break;
1129 case LONG:
1130 kprintf("l");
1131 break;
1132 case QUAD:
1133 kprintf("q");
1134 break;
1135 default:
1136 break;
1137 }
1138 kprintf("\t");
1139 db_print_address(seg, BYTE, rex, &address);
1140 }
1141 else {
1142 /*
1143 * 'reg-reg' - special formats
1144 */
1145 switch (fp->f_rrmode) {
1146 case op2(ST,STI):
1147 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1148 kprintf("%s\t%%st,%%st(%d)",name,f_rm(rex, regmodrm));
1149 break;
1150 case op2(STI,ST):
1151 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1152 kprintf("%s\t%%st(%d),%%st",name, f_rm(rex, regmodrm));
1153 break;
1154 case op1(STI):
1155 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1156 kprintf("%s\t%%st(%d)",name, f_rm(rex, regmodrm));
1157 break;
1158 case op1(X):
1159 name = ((const char * const *)fp->f_rrname)[f_rm(rex, regmodrm)];
1160 if (*name == '\0')
1161 goto bad;
1162 kprintf("%s", name);
1163 break;
1164 case op1(XA):
1165 name = ((const char * const *)fp->f_rrname)[f_rm(rex, regmodrm)];
1166 if (*name == '\0')
1167 goto bad;
1168 kprintf("%s\t%%ax", name);
1169 break;
1170 default:
1171 bad:
1172 kprintf("<bad instruction>");
1173 break;
1174 }
1175 }
1176
1177 return (loc);
1178 }
1179
1180 /*
1181 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1182 * (optional) alternate format. Return address of start of
1183 * next instruction.
1184 */
1185 uintptr_t
db_disasm(uintptr_t loc,bool altfmt)1186 db_disasm(uintptr_t loc, bool altfmt)
1187 {
1188 int inst;
1189 int size;
1190 int short_addr;
1191 const char * seg;
1192 const struct inst * ip;
1193 const char * i_name;
1194 int i_size;
1195 int i_mode;
1196 int rex = 0;
1197 int regmodrm = 0;
1198 bool first;
1199 int displ;
1200 int prefix;
1201 int rep;
1202 int imm;
1203 int imm2;
1204 long imm64;
1205 int len;
1206 struct i_addr address;
1207
1208 get_value_inc(inst, loc, 1, FALSE);
1209 short_addr = FALSE;
1210 size = LONG;
1211 seg = 0;
1212
1213 /*
1214 * Get prefixes
1215 */
1216 rep = FALSE;
1217 prefix = TRUE;
1218 do {
1219 switch (inst) {
1220 case 0x66: /* data16 */
1221 size = WORD;
1222 break;
1223 case 0x67:
1224 short_addr = TRUE;
1225 break;
1226 case 0x26:
1227 seg = "%es";
1228 break;
1229 case 0x36:
1230 seg = "%ss";
1231 break;
1232 case 0x2e:
1233 seg = "%cs";
1234 break;
1235 case 0x3e:
1236 seg = "%ds";
1237 break;
1238 case 0x64:
1239 seg = "%fs";
1240 break;
1241 case 0x65:
1242 seg = "%gs";
1243 break;
1244 case 0xf0:
1245 kprintf("lock ");
1246 break;
1247 case 0xf2:
1248 kprintf("repne ");
1249 break;
1250 case 0xf3:
1251 rep = TRUE;
1252 break;
1253 default:
1254 prefix = FALSE;
1255 break;
1256 }
1257 if (inst >= 0x40 && inst < 0x50) {
1258 rex = inst;
1259 prefix = TRUE;
1260 }
1261 if (prefix) {
1262 get_value_inc(inst, loc, 1, FALSE);
1263 }
1264 } while (prefix);
1265
1266 if (inst >= 0xd8 && inst <= 0xdf) {
1267 loc = db_disasm_esc(loc, inst, rex, short_addr, size, seg);
1268 kprintf("\n");
1269 return (loc);
1270 }
1271
1272 ip = &db_inst_table[inst];
1273 while (ip->i_size == ESC) {
1274 get_value_inc(inst, loc, 1, FALSE);
1275 ip = ((const struct inst * const *)ip->i_extra)[inst>>4];
1276 if (ip == 0) {
1277 ip = &db_bad_inst;
1278 }
1279 else {
1280 ip = &ip[inst&0xf];
1281 }
1282 }
1283
1284 if (ip->i_has_modrm) {
1285 get_value_inc(regmodrm, loc, 1, FALSE);
1286 loc = db_read_address(loc, short_addr, rex, regmodrm, &address);
1287 }
1288
1289 i_name = ip->i_name;
1290 i_size = ip->i_size;
1291 i_mode = ip->i_mode;
1292
1293 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1294 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1295 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 ||
1296 ip->i_extra == db_Grp15) {
1297 i_name = ((const char * const *)ip->i_extra)[f_reg(rex, regmodrm)];
1298 }
1299 else if (ip->i_extra == db_Grp3) {
1300 ip = ip->i_extra;
1301 ip = &ip[f_reg(rex, regmodrm)];
1302 i_name = ip->i_name;
1303 i_mode = ip->i_mode;
1304 }
1305 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1306 ip = ip->i_extra;
1307 ip = &ip[f_reg(rex, regmodrm)];
1308 i_name = ip->i_name;
1309 i_mode = ip->i_mode;
1310 i_size = ip->i_size;
1311 }
1312
1313 /* Special cases that don't fit well in the tables. */
1314 if (ip->i_extra == db_Grp7 && f_mod(rex, regmodrm) == 3) {
1315 switch (regmodrm) {
1316 case 0xc1:
1317 i_name = "vmcall";
1318 i_size = NONE;
1319 i_mode = 0;
1320 break;
1321 case 0xc2:
1322 i_name = "vmlaunch";
1323 i_size = NONE;
1324 i_mode = 0;
1325 break;
1326 case 0xc3:
1327 i_name = "vmresume";
1328 i_size = NONE;
1329 i_mode = 0;
1330 break;
1331 case 0xc4:
1332 i_name = "vmxoff";
1333 i_size = NONE;
1334 i_mode = 0;
1335 break;
1336 case 0xc8:
1337 i_name = "monitor";
1338 i_size = NONE;
1339 i_mode = 0;
1340 break;
1341 case 0xc9:
1342 i_name = "mwait";
1343 i_size = NONE;
1344 i_mode = 0;
1345 break;
1346 case 0xd0:
1347 i_name = "xgetbv";
1348 i_size = NONE;
1349 i_mode = 0;
1350 break;
1351 case 0xd1:
1352 i_name = "xsetbv";
1353 i_size = NONE;
1354 i_mode = 0;
1355 break;
1356 case 0xf8:
1357 i_name = "swapgs";
1358 i_size = NONE;
1359 i_mode = 0;
1360 break;
1361 case 0xf9:
1362 i_name = "rdtscp";
1363 i_size = NONE;
1364 i_mode = 0;
1365 break;
1366 }
1367 }
1368 if (ip->i_extra == db_Grp15 && f_mod(rex, regmodrm) == 3) {
1369 i_name = db_Grp15b[f_reg(rex, regmodrm)];
1370 i_size = NONE;
1371 i_mode = 0;
1372 }
1373
1374 /* Handle instructions identified by mandatory prefixes. */
1375 if (rep == TRUE) {
1376 if (inst == 0x90) {
1377 i_name = "pause";
1378 i_size = NONE;
1379 i_mode = 0;
1380 rep = FALSE;
1381 } else if (ip->i_extra == db_Grp9 && f_mod(rex, regmodrm) != 3 &&
1382 f_reg(rex, regmodrm) == 0x6) {
1383 i_name = "vmxon";
1384 rep = FALSE;
1385 }
1386 }
1387 if (size == WORD) {
1388 if (ip->i_extra == db_Grp9 && f_mod(rex, regmodrm) != 3 &&
1389 f_reg(rex, regmodrm) == 0x6) {
1390 i_name = "vmclear";
1391 }
1392 }
1393 if (rex & REX_W) {
1394 if (strcmp(i_name, "cwde") == 0)
1395 i_name = "cdqe";
1396 else if (strcmp(i_name, "cmpxchg8b") == 0)
1397 i_name = "cmpxchg16b";
1398 }
1399
1400 if (rep == TRUE)
1401 kprintf("repe "); /* XXX repe VS rep */
1402
1403 if (i_size == SDEP) {
1404 if (size == LONG)
1405 kprintf("%s", i_name);
1406 else
1407 kprintf("%s", (const char *)ip->i_extra);
1408 } else if (i_size == ADEP) {
1409 if (short_addr == FALSE)
1410 kprintf("%s", i_name);
1411 else
1412 kprintf("%s", (const char *)ip->i_extra);
1413 }
1414 else {
1415 kprintf("%s", i_name);
1416 if ((inst >= 0x50 && inst <= 0x5f) || inst == 0x68 || inst == 0x6a) {
1417 i_size = NONE;
1418 kprintf("q");
1419 }
1420 if (i_size != NONE) {
1421 if (i_size == BYTE) {
1422 kprintf("b");
1423 size = BYTE;
1424 }
1425 else if (i_size == WORD) {
1426 kprintf("w");
1427 size = WORD;
1428 }
1429 else if (size == WORD)
1430 kprintf("w");
1431 else {
1432 if (rex & REX_W)
1433 kprintf("q");
1434 else
1435 kprintf("l");
1436 }
1437 }
1438 }
1439 kprintf("\t");
1440 for (first = TRUE;
1441 i_mode != 0;
1442 i_mode >>= 8, first = FALSE)
1443 {
1444 if (!first)
1445 kprintf(",");
1446
1447 switch (i_mode & 0xFF) {
1448
1449 case E:
1450 db_print_address(seg, size, rex, &address);
1451 break;
1452
1453 case Eind:
1454 kprintf("*");
1455 db_print_address(seg, size, rex, &address);
1456 break;
1457
1458 case El:
1459 db_print_address(seg, (rex & REX_W) ? QUAD : LONG, rex, &address);
1460 break;
1461
1462 case EL:
1463 db_print_address(seg, LONG, 0, &address);
1464 break;
1465
1466 case Ew:
1467 db_print_address(seg, WORD, rex, &address);
1468 break;
1469
1470 case Eb:
1471 db_print_address(seg, BYTE, rex, &address);
1472 break;
1473
1474 case R:
1475 kprintf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][f_reg(rex, regmodrm)]);
1476 break;
1477
1478 case Rw:
1479 kprintf("%s", db_reg[rex != 0 ? 1 : 0][WORD][f_reg(rex, regmodrm)]);
1480 break;
1481
1482 case Rq:
1483 kprintf("%s", db_reg[rex != 0 ? 1 : 0][QUAD][f_reg(rex, regmodrm)]);
1484 break;
1485
1486 case Ri:
1487 kprintf("%s", db_reg[0][QUAD][f_rm(rex, inst)]);
1488 break;
1489
1490 case Ril:
1491 kprintf("%s", db_reg[rex != 0 ? 1 : 0][(rex & REX_R) ? QUAD : LONG][f_rm(rex, inst)]);
1492 break;
1493
1494 case S:
1495 kprintf("%s", db_seg_reg[f_reg(rex, regmodrm)]);
1496 break;
1497
1498 case Si:
1499 kprintf("%s", db_seg_reg[f_reg(rex, inst)]);
1500 break;
1501
1502 case A:
1503 kprintf("%s", db_reg[rex != 0 ? 1 : 0][size][0]); /* acc */
1504 break;
1505
1506 case BX:
1507 if (seg)
1508 kprintf("%s:", seg);
1509 kprintf("(%s)", short_addr ? "%bx" : "%ebx");
1510 break;
1511
1512 case CL:
1513 kprintf("%%cl");
1514 break;
1515
1516 case DX:
1517 kprintf("%%dx");
1518 break;
1519
1520 case SI:
1521 if (seg)
1522 kprintf("%s:", seg);
1523 kprintf("(%s)", short_addr ? "%si" : "%rsi");
1524 break;
1525
1526 case DI:
1527 kprintf("%%es:(%s)", short_addr ? "%di" : "%rdi");
1528 break;
1529
1530 case CR:
1531 kprintf("%%cr%d", f_reg(rex, regmodrm));
1532 break;
1533
1534 case DR:
1535 kprintf("%%dr%d", f_reg(rex, regmodrm));
1536 break;
1537
1538 case TR:
1539 kprintf("%%tr%d", f_reg(rex, regmodrm));
1540 break;
1541
1542 case I:
1543 len = db_lengths[size];
1544 get_value_inc(imm, loc, len, FALSE);
1545 kprintf("$%d", imm);
1546 break;
1547
1548 case Is:
1549 len = db_lengths[(size == LONG && (rex & REX_W)) ? QUAD : size];
1550 get_value_inc(imm, loc, len, FALSE);
1551 kprintf("$%d", imm);
1552 break;
1553
1554 case Ib:
1555 get_value_inc(imm, loc, 1, FALSE);
1556 kprintf("$%d", imm);
1557 break;
1558
1559 case Iba:
1560 get_value_inc(imm, loc, 1, FALSE);
1561 if (imm != 0x0a)
1562 kprintf("$%d", imm);
1563 break;
1564
1565 case Ibs:
1566 get_value_inc(imm, loc, 1, TRUE);
1567 if (size == WORD)
1568 imm &= 0xFFFF;
1569 kprintf("$%d", imm);
1570 break;
1571
1572 case Iw:
1573 get_value_inc(imm, loc, 2, FALSE);
1574 kprintf("$%d", imm);
1575 break;
1576
1577 case Ilq:
1578 len = db_lengths[rex & REX_W ? QUAD : LONG];
1579 get_value_inc(imm64, loc, len, FALSE);
1580 kprintf("$%#lr", imm64);
1581 break;
1582
1583 case O:
1584 len = (short_addr ? 2 : 4);
1585 get_value_inc(displ, loc, len, FALSE);
1586 if (seg)
1587 kprintf("%s:%d",seg, displ);
1588 else
1589 Debug_PrintSymbol((uintptr_t)displ, DB_STGY_ANY);
1590 break;
1591
1592 case Db:
1593 get_value_inc(displ, loc, 1, TRUE);
1594 displ += loc;
1595 if (size == WORD)
1596 displ &= 0xFFFF;
1597 Debug_PrintSymbol((uintptr_t)displ, DB_STGY_XTRN);
1598 break;
1599
1600 case Dl:
1601 len = db_lengths[(size == LONG && (rex & REX_W)) ? QUAD : size];
1602 get_value_inc(displ, loc, len, FALSE);
1603 displ += loc;
1604 if (size == WORD)
1605 displ &= 0xFFFF;
1606 Debug_PrintSymbol((uintptr_t)displ, DB_STGY_XTRN);
1607 break;
1608
1609 case o1:
1610 kprintf("$1");
1611 break;
1612
1613 case o3:
1614 kprintf("$3");
1615 break;
1616
1617 case OS:
1618 len = db_lengths[size];
1619 get_value_inc(imm, loc, len, FALSE); /* offset */
1620 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1621 kprintf("$%d,%d", imm2, imm);
1622 break;
1623 }
1624 }
1625 kprintf("\n");
1626 return (loc);
1627 }
1628