1/*-
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19 *  School of Computer Science
20 *  Carnegie Mellon University
21 *  Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30/*
31 * Instruction disassembler.
32 */
33#include <sys/param.h>
34
35#include <ddb/ddb.h>
36#include <ddb/db_access.h>
37#include <ddb/db_sym.h>
38
39/*
40 * Size attributes
41 */
42#define	BYTE	0
43#define	WORD	1
44#define	LONG	2
45#define	QUAD	3
46#define	SNGL	4
47#define	DBLR	5
48#define	EXTR	6
49#define	SDEP	7
50#define	NONE	8
51
52/*
53 * Addressing modes
54 */
55#define	E	1			/* general effective address */
56#define	Eind	2			/* indirect address (jump, call) */
57#define	Ew	3			/* address, word size */
58#define	Eb	4			/* address, byte size */
59#define	R	5			/* register, in 'reg' field */
60#define	Rw	6			/* word register, in 'reg' field */
61#define	Ri	7			/* register in instruction */
62#define	S	8			/* segment reg, in 'reg' field */
63#define	Si	9			/* segment reg, in instruction */
64#define	A	10			/* accumulator */
65#define	BX	11			/* (bx) */
66#define	CL	12			/* cl, for shifts */
67#define	DX	13			/* dx, for IO */
68#define	SI	14			/* si */
69#define	DI	15			/* di */
70#define	CR	16			/* control register */
71#define	DR	17			/* debug register */
72#define	TR	18			/* test register */
73#define	I	19			/* immediate, unsigned */
74#define	Is	20			/* immediate, signed */
75#define	Ib	21			/* byte immediate, unsigned */
76#define	Ibs	22			/* byte immediate, signed */
77#define	Iw	23			/* word immediate, unsigned */
78#define	O	25			/* direct address */
79#define	Db	26			/* byte displacement from EIP */
80#define	Dl	27			/* long displacement from EIP */
81#define	o1	28			/* constant 1 */
82#define	o3	29			/* constant 3 */
83#define	OS	30			/* immediate offset/segment */
84#define	ST	31			/* FP stack top */
85#define	STI	32			/* FP stack */
86#define	X	33			/* extended FP op */
87#define	XA	34			/* for 'fstcw %ax' */
88#define	El	35			/* address, long size */
89#define	Ril	36			/* long register in instruction */
90#define	Iba	37			/* byte immediate, don't print if 0xa */
91
92struct inst {
93	const char *	i_name;		/* name */
94	short	i_has_modrm;		/* has regmodrm byte */
95	short	i_size;			/* operand size */
96	int	i_mode;			/* addressing modes */
97	const void *	i_extra;	/* pointer to extra opcode table */
98};
99
100#define	op1(x)		(x)
101#define	op2(x,y)	((x)|((y)<<8))
102#define	op3(x,y,z)	((x)|((y)<<8)|((z)<<16))
103
104struct finst {
105	const char *	f_name;		/* name for memory instruction */
106	int	f_size;			/* size for memory instruction */
107	int	f_rrmode;		/* mode for rr instruction */
108	const void *	f_rrname;	/* name for rr instruction
109					   (or pointer to table) */
110};
111
112static const char * const db_Grp6[] = {
113	"sldt",
114	"str",
115	"lldt",
116	"ltr",
117	"verr",
118	"verw",
119	"",
120	""
121};
122
123static const char * const db_Grp7[] = {
124	"sgdt",
125	"sidt",
126	"lgdt",
127	"lidt",
128	"smsw",
129	"",
130	"lmsw",
131	"invlpg"
132};
133
134static const char * const db_Grp8[] = {
135	"",
136	"",
137	"",
138	"",
139	"bt",
140	"bts",
141	"btr",
142	"btc"
143};
144
145static const char * const db_Grp9[] = {
146	"",
147	"cmpxchg8b",
148	"",
149	"",
150	"",
151	"",
152	"",
153	""
154};
155
156static const char * const db_Grp15[] = {
157	"fxsave",
158	"fxrstor",
159	"ldmxcsr",
160	"stmxcsr",
161	"",
162	"",
163	"",
164	"clflush"
165};
166
167static const char * const db_Grp15b[] = {
168	"",
169	"",
170	"",
171	"",
172	"",
173	"lfence",
174	"mfence",
175	"sfence"
176};
177
178static const struct inst db_inst_0f0x[] = {
179/*00*/	{ "",	   TRUE,  NONE,  op1(Ew),     db_Grp6 },
180/*01*/	{ "",	   TRUE,  NONE,  op1(Ew),     db_Grp7 },
181/*02*/	{ "lar",   TRUE,  LONG,  op2(E,R),    0 },
182/*03*/	{ "lsl",   TRUE,  LONG,  op2(E,R),    0 },
183/*04*/	{ "",      FALSE, NONE,  0,	      0 },
184/*05*/	{ "syscall",FALSE,NONE,  0,	      0 },
185/*06*/	{ "clts",  FALSE, NONE,  0,	      0 },
186/*07*/	{ "sysret",FALSE, NONE,  0,	      0 },
187
188/*08*/	{ "invd",  FALSE, NONE,  0,	      0 },
189/*09*/	{ "wbinvd",FALSE, NONE,  0,	      0 },
190/*0a*/	{ "",      FALSE, NONE,  0,	      0 },
191/*0b*/	{ "",      FALSE, NONE,  0,	      0 },
192/*0c*/	{ "",      FALSE, NONE,  0,	      0 },
193/*0d*/	{ "",      FALSE, NONE,  0,	      0 },
194/*0e*/	{ "",      FALSE, NONE,  0,	      0 },
195/*0f*/	{ "",      FALSE, NONE,  0,	      0 },
196};
197
198static const struct inst db_inst_0f2x[] = {
199/*20*/	{ "mov",   TRUE,  LONG,  op2(CR,El),  0 },
200/*21*/	{ "mov",   TRUE,  LONG,  op2(DR,El),  0 },
201/*22*/	{ "mov",   TRUE,  LONG,  op2(El,CR),  0 },
202/*23*/	{ "mov",   TRUE,  LONG,  op2(El,DR),  0 },
203/*24*/	{ "mov",   TRUE,  LONG,  op2(TR,El),  0 },
204/*25*/	{ "",      FALSE, NONE,  0,	      0 },
205/*26*/	{ "mov",   TRUE,  LONG,  op2(El,TR),  0 },
206/*27*/	{ "",      FALSE, NONE,  0,	      0 },
207
208/*28*/	{ "",      FALSE, NONE,  0,	      0 },
209/*29*/	{ "",      FALSE, NONE,  0,	      0 },
210/*2a*/	{ "",      FALSE, NONE,  0,	      0 },
211/*2b*/	{ "",      FALSE, NONE,  0,	      0 },
212/*2c*/	{ "",      FALSE, NONE,  0,	      0 },
213/*2d*/	{ "",      FALSE, NONE,  0,	      0 },
214/*2e*/	{ "",      FALSE, NONE,  0,	      0 },
215/*2f*/	{ "",      FALSE, NONE,  0,	      0 },
216};
217
218static const struct inst db_inst_0f3x[] = {
219/*30*/	{ "wrmsr", FALSE, NONE,  0,	      0 },
220/*31*/	{ "rdtsc", FALSE, NONE,  0,	      0 },
221/*32*/	{ "rdmsr", FALSE, NONE,  0,	      0 },
222/*33*/	{ "rdpmc", FALSE, NONE,  0,	      0 },
223/*34*/	{ "sysenter",FALSE,NONE,  0,	      0 },
224/*35*/	{ "sysexit",FALSE,NONE,  0,	      0 },
225/*36*/	{ "",	   FALSE, NONE,  0,	      0 },
226/*37*/	{ "getsec",FALSE, NONE,  0,	      0 },
227
228/*38*/	{ "",	   FALSE, NONE,  0,	      0 },
229/*39*/	{ "",	   FALSE, NONE,  0,	      0 },
230/*3a*/	{ "",	   FALSE, NONE,  0,	      0 },
231/*3b*/	{ "",	   FALSE, NONE,  0,	      0 },
232/*3c*/	{ "",	   FALSE, NONE,  0,	      0 },
233/*3d*/	{ "",	   FALSE, NONE,  0,	      0 },
234/*3e*/	{ "",	   FALSE, NONE,  0,	      0 },
235/*3f*/	{ "",	   FALSE, NONE,  0,	      0 },
236};
237
238static const struct inst db_inst_0f4x[] = {
239/*40*/	{ "cmovo",  TRUE, NONE,  op2(E, R),   0 },
240/*41*/	{ "cmovno", TRUE, NONE,  op2(E, R),   0 },
241/*42*/	{ "cmovb",  TRUE, NONE,  op2(E, R),   0 },
242/*43*/	{ "cmovnb", TRUE, NONE,  op2(E, R),   0 },
243/*44*/	{ "cmovz",  TRUE, NONE,  op2(E, R),   0 },
244/*45*/	{ "cmovnz", TRUE, NONE,  op2(E, R),   0 },
245/*46*/	{ "cmovbe", TRUE, NONE,  op2(E, R),   0 },
246/*47*/	{ "cmovnbe",TRUE, NONE,  op2(E, R),   0 },
247
248/*48*/	{ "cmovs",  TRUE, NONE,  op2(E, R),   0 },
249/*49*/	{ "cmovns", TRUE, NONE,  op2(E, R),   0 },
250/*4a*/	{ "cmovp",  TRUE, NONE,  op2(E, R),   0 },
251/*4b*/	{ "cmovnp", TRUE, NONE,  op2(E, R),   0 },
252/*4c*/	{ "cmovl",  TRUE, NONE,  op2(E, R),   0 },
253/*4d*/	{ "cmovnl", TRUE, NONE,  op2(E, R),   0 },
254/*4e*/	{ "cmovle", TRUE, NONE,  op2(E, R),   0 },
255/*4f*/	{ "cmovnle",TRUE, NONE,  op2(E, R),   0 },
256};
257
258static const struct inst db_inst_0f8x[] = {
259/*80*/	{ "jo",    FALSE, NONE,  op1(Dl),     0 },
260/*81*/	{ "jno",   FALSE, NONE,  op1(Dl),     0 },
261/*82*/	{ "jb",    FALSE, NONE,  op1(Dl),     0 },
262/*83*/	{ "jnb",   FALSE, NONE,  op1(Dl),     0 },
263/*84*/	{ "jz",    FALSE, NONE,  op1(Dl),     0 },
264/*85*/	{ "jnz",   FALSE, NONE,  op1(Dl),     0 },
265/*86*/	{ "jbe",   FALSE, NONE,  op1(Dl),     0 },
266/*87*/	{ "jnbe",  FALSE, NONE,  op1(Dl),     0 },
267
268/*88*/	{ "js",    FALSE, NONE,  op1(Dl),     0 },
269/*89*/	{ "jns",   FALSE, NONE,  op1(Dl),     0 },
270/*8a*/	{ "jp",    FALSE, NONE,  op1(Dl),     0 },
271/*8b*/	{ "jnp",   FALSE, NONE,  op1(Dl),     0 },
272/*8c*/	{ "jl",    FALSE, NONE,  op1(Dl),     0 },
273/*8d*/	{ "jnl",   FALSE, NONE,  op1(Dl),     0 },
274/*8e*/	{ "jle",   FALSE, NONE,  op1(Dl),     0 },
275/*8f*/	{ "jnle",  FALSE, NONE,  op1(Dl),     0 },
276};
277
278static const struct inst db_inst_0f9x[] = {
279/*90*/	{ "seto",  TRUE,  NONE,  op1(Eb),     0 },
280/*91*/	{ "setno", TRUE,  NONE,  op1(Eb),     0 },
281/*92*/	{ "setb",  TRUE,  NONE,  op1(Eb),     0 },
282/*93*/	{ "setnb", TRUE,  NONE,  op1(Eb),     0 },
283/*94*/	{ "setz",  TRUE,  NONE,  op1(Eb),     0 },
284/*95*/	{ "setnz", TRUE,  NONE,  op1(Eb),     0 },
285/*96*/	{ "setbe", TRUE,  NONE,  op1(Eb),     0 },
286/*97*/	{ "setnbe",TRUE,  NONE,  op1(Eb),     0 },
287
288/*98*/	{ "sets",  TRUE,  NONE,  op1(Eb),     0 },
289/*99*/	{ "setns", TRUE,  NONE,  op1(Eb),     0 },
290/*9a*/	{ "setp",  TRUE,  NONE,  op1(Eb),     0 },
291/*9b*/	{ "setnp", TRUE,  NONE,  op1(Eb),     0 },
292/*9c*/	{ "setl",  TRUE,  NONE,  op1(Eb),     0 },
293/*9d*/	{ "setnl", TRUE,  NONE,  op1(Eb),     0 },
294/*9e*/	{ "setle", TRUE,  NONE,  op1(Eb),     0 },
295/*9f*/	{ "setnle",TRUE,  NONE,  op1(Eb),     0 },
296};
297
298static const struct inst db_inst_0fax[] = {
299/*a0*/	{ "push",  FALSE, NONE,  op1(Si),     0 },
300/*a1*/	{ "pop",   FALSE, NONE,  op1(Si),     0 },
301/*a2*/	{ "cpuid", FALSE, NONE,  0,	      0 },
302/*a3*/	{ "bt",    TRUE,  LONG,  op2(R,E),    0 },
303/*a4*/	{ "shld",  TRUE,  LONG,  op3(Ib,R,E), 0 },
304/*a5*/	{ "shld",  TRUE,  LONG,  op3(CL,R,E), 0 },
305/*a6*/	{ "",      FALSE, NONE,  0,	      0 },
306/*a7*/	{ "",      FALSE, NONE,  0,	      0 },
307
308/*a8*/	{ "push",  FALSE, NONE,  op1(Si),     0 },
309/*a9*/	{ "pop",   FALSE, NONE,  op1(Si),     0 },
310/*aa*/	{ "rsm",   FALSE, NONE,  0,	      0 },
311/*ab*/	{ "bts",   TRUE,  LONG,  op2(R,E),    0 },
312/*ac*/	{ "shrd",  TRUE,  LONG,  op3(Ib,R,E), 0 },
313/*ad*/	{ "shrd",  TRUE,  LONG,  op3(CL,R,E), 0 },
314/*ae*/	{ "",      TRUE,  LONG,  op1(E),      db_Grp15 },
315/*af*/	{ "imul",  TRUE,  LONG,  op2(E,R),    0 },
316};
317
318static const struct inst db_inst_0fbx[] = {
319/*b0*/	{ "cmpxchg",TRUE, BYTE,	 op2(R, E),   0 },
320/*b0*/	{ "cmpxchg",TRUE, LONG,	 op2(R, E),   0 },
321/*b2*/	{ "lss",   TRUE,  LONG,  op2(E, R),   0 },
322/*b3*/	{ "btr",   TRUE,  LONG,  op2(R, E),   0 },
323/*b4*/	{ "lfs",   TRUE,  LONG,  op2(E, R),   0 },
324/*b5*/	{ "lgs",   TRUE,  LONG,  op2(E, R),   0 },
325/*b6*/	{ "movzb", TRUE,  LONG,  op2(Eb, R),  0 },
326/*b7*/	{ "movzw", TRUE,  LONG,  op2(Ew, R),  0 },
327
328/*b8*/	{ "",      FALSE, NONE,  0,	      0 },
329/*b9*/	{ "",      FALSE, NONE,  0,	      0 },
330/*ba*/	{ "",      TRUE,  LONG,  op2(Ib, E),  db_Grp8 },
331/*bb*/	{ "btc",   TRUE,  LONG,  op2(R, E),   0 },
332/*bc*/	{ "bsf",   TRUE,  LONG,  op2(E, R),   0 },
333/*bd*/	{ "bsr",   TRUE,  LONG,  op2(E, R),   0 },
334/*be*/	{ "movsb", TRUE,  LONG,  op2(Eb, R),  0 },
335/*bf*/	{ "movsw", TRUE,  LONG,  op2(Ew, R),  0 },
336};
337
338static const struct inst db_inst_0fcx[] = {
339/*c0*/	{ "xadd",  TRUE,  BYTE,	 op2(R, E),   0 },
340/*c1*/	{ "xadd",  TRUE,  LONG,	 op2(R, E),   0 },
341/*c2*/	{ "",	   FALSE, NONE,	 0,	      0 },
342/*c3*/	{ "",	   FALSE, NONE,	 0,	      0 },
343/*c4*/	{ "",	   FALSE, NONE,	 0,	      0 },
344/*c5*/	{ "",	   FALSE, NONE,	 0,	      0 },
345/*c6*/	{ "",	   FALSE, NONE,	 0,	      0 },
346/*c7*/	{ "",	   TRUE,  NONE,  op1(E),      db_Grp9 },
347/*c8*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
348/*c9*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
349/*ca*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
350/*cb*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
351/*cc*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
352/*cd*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
353/*ce*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
354/*cf*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
355};
356
357static const struct inst * const db_inst_0f[] = {
358	db_inst_0f0x,
359	0,
360	db_inst_0f2x,
361	db_inst_0f3x,
362	db_inst_0f4x,
363	0,
364	0,
365	0,
366	db_inst_0f8x,
367	db_inst_0f9x,
368	db_inst_0fax,
369	db_inst_0fbx,
370	db_inst_0fcx,
371	0,
372	0,
373	0
374};
375
376static const char * const db_Esc92[] = {
377	"fnop",	"",	"",	"",	"",	"",	"",	""
378};
379static const char * const db_Esc94[] = {
380	"fchs",	"fabs",	"",	"",	"ftst",	"fxam",	"",	""
381};
382static const char * const db_Esc95[] = {
383	"fld1",	"fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
384};
385static const char * const db_Esc96[] = {
386	"f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
387	"fincstp"
388};
389static const char * const db_Esc97[] = {
390	"fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
391};
392
393static const char * const db_Esca5[] = {
394	"",	"fucompp","",	"",	"",	"",	"",	""
395};
396
397static const char * const db_Escb4[] = {
398	"fneni","fndisi",	"fnclex","fninit","fsetpm",	"",	"",	""
399};
400
401static const char * const db_Esce3[] = {
402	"",	"fcompp","",	"",	"",	"",	"",	""
403};
404
405static const char * const db_Escf4[] = {
406	"fnstsw","",	"",	"",	"",	"",	"",	""
407};
408
409static const struct finst db_Esc8[] = {
410/*0*/	{ "fadd",   SNGL,  op2(STI,ST),	0 },
411/*1*/	{ "fmul",   SNGL,  op2(STI,ST),	0 },
412/*2*/	{ "fcom",   SNGL,  op2(STI,ST),	0 },
413/*3*/	{ "fcomp",  SNGL,  op2(STI,ST),	0 },
414/*4*/	{ "fsub",   SNGL,  op2(STI,ST),	0 },
415/*5*/	{ "fsubr",  SNGL,  op2(STI,ST),	0 },
416/*6*/	{ "fdiv",   SNGL,  op2(STI,ST),	0 },
417/*7*/	{ "fdivr",  SNGL,  op2(STI,ST),	0 },
418};
419
420static const struct finst db_Esc9[] = {
421/*0*/	{ "fld",    SNGL,  op1(STI),	0 },
422/*1*/	{ "",       NONE,  op1(STI),	"fxch" },
423/*2*/	{ "fst",    SNGL,  op1(X),	db_Esc92 },
424/*3*/	{ "fstp",   SNGL,  0,		0 },
425/*4*/	{ "fldenv", NONE,  op1(X),	db_Esc94 },
426/*5*/	{ "fldcw",  NONE,  op1(X),	db_Esc95 },
427/*6*/	{ "fnstenv",NONE,  op1(X),	db_Esc96 },
428/*7*/	{ "fnstcw", NONE,  op1(X),	db_Esc97 },
429};
430
431static const struct finst db_Esca[] = {
432/*0*/	{ "fiadd",  LONG,  0,		0 },
433/*1*/	{ "fimul",  LONG,  0,		0 },
434/*2*/	{ "ficom",  LONG,  0,		0 },
435/*3*/	{ "ficomp", LONG,  0,		0 },
436/*4*/	{ "fisub",  LONG,  0,		0 },
437/*5*/	{ "fisubr", LONG,  op1(X),	db_Esca5 },
438/*6*/	{ "fidiv",  LONG,  0,		0 },
439/*7*/	{ "fidivr", LONG,  0,		0 }
440};
441
442static const struct finst db_Escb[] = {
443/*0*/	{ "fild",   LONG,  0,		0 },
444/*1*/	{ "",       NONE,  0,		0 },
445/*2*/	{ "fist",   LONG,  0,		0 },
446/*3*/	{ "fistp",  LONG,  0,		0 },
447/*4*/	{ "",       WORD,  op1(X),	db_Escb4 },
448/*5*/	{ "fld",    EXTR,  0,		0 },
449/*6*/	{ "",       WORD,  0,		0 },
450/*7*/	{ "fstp",   EXTR,  0,		0 },
451};
452
453static const struct finst db_Escc[] = {
454/*0*/	{ "fadd",   DBLR,  op2(ST,STI),	0 },
455/*1*/	{ "fmul",   DBLR,  op2(ST,STI),	0 },
456/*2*/	{ "fcom",   DBLR,  0,		0 },
457/*3*/	{ "fcomp",  DBLR,  0,		0 },
458/*4*/	{ "fsub",   DBLR,  op2(ST,STI),	"fsubr" },
459/*5*/	{ "fsubr",  DBLR,  op2(ST,STI),	"fsub" },
460/*6*/	{ "fdiv",   DBLR,  op2(ST,STI),	"fdivr" },
461/*7*/	{ "fdivr",  DBLR,  op2(ST,STI),	"fdiv" },
462};
463
464static const struct finst db_Escd[] = {
465/*0*/	{ "fld",    DBLR,  op1(STI),	"ffree" },
466/*1*/	{ "",       NONE,  0,		0 },
467/*2*/	{ "fst",    DBLR,  op1(STI),	0 },
468/*3*/	{ "fstp",   DBLR,  op1(STI),	0 },
469/*4*/	{ "frstor", NONE,  op1(STI),	"fucom" },
470/*5*/	{ "",       NONE,  op1(STI),	"fucomp" },
471/*6*/	{ "fnsave", NONE,  0,		0 },
472/*7*/	{ "fnstsw", NONE,  0,		0 },
473};
474
475static const struct finst db_Esce[] = {
476/*0*/	{ "fiadd",  WORD,  op2(ST,STI),	"faddp" },
477/*1*/	{ "fimul",  WORD,  op2(ST,STI),	"fmulp" },
478/*2*/	{ "ficom",  WORD,  0,		0 },
479/*3*/	{ "ficomp", WORD,  op1(X),	db_Esce3 },
480/*4*/	{ "fisub",  WORD,  op2(ST,STI),	"fsubrp" },
481/*5*/	{ "fisubr", WORD,  op2(ST,STI),	"fsubp" },
482/*6*/	{ "fidiv",  WORD,  op2(ST,STI),	"fdivrp" },
483/*7*/	{ "fidivr", WORD,  op2(ST,STI),	"fdivp" },
484};
485
486static const struct finst db_Escf[] = {
487/*0*/	{ "fild",   WORD,  0,		0 },
488/*1*/	{ "",       NONE,  0,		0 },
489/*2*/	{ "fist",   WORD,  0,		0 },
490/*3*/	{ "fistp",  WORD,  0,		0 },
491/*4*/	{ "fbld",   NONE,  op1(XA),	db_Escf4 },
492/*5*/	{ "fild",   QUAD,  0,		0 },
493/*6*/	{ "fbstp",  NONE,  0,		0 },
494/*7*/	{ "fistp",  QUAD,  0,		0 },
495};
496
497static const struct finst * const db_Esc_inst[] = {
498	db_Esc8, db_Esc9, db_Esca, db_Escb,
499	db_Escc, db_Escd, db_Esce, db_Escf
500};
501
502static const char * const db_Grp1[] = {
503	"add",
504	"or",
505	"adc",
506	"sbb",
507	"and",
508	"sub",
509	"xor",
510	"cmp"
511};
512
513static const char * const db_Grp2[] = {
514	"rol",
515	"ror",
516	"rcl",
517	"rcr",
518	"shl",
519	"shr",
520	"shl",
521	"sar"
522};
523
524static const struct inst db_Grp3[] = {
525	{ "test",  TRUE, NONE, op2(I,E), 0 },
526	{ "test",  TRUE, NONE, op2(I,E), 0 },
527	{ "not",   TRUE, NONE, op1(E),   0 },
528	{ "neg",   TRUE, NONE, op1(E),   0 },
529	{ "mul",   TRUE, NONE, op2(E,A), 0 },
530	{ "imul",  TRUE, NONE, op2(E,A), 0 },
531	{ "div",   TRUE, NONE, op2(E,A), 0 },
532	{ "idiv",  TRUE, NONE, op2(E,A), 0 },
533};
534
535static const struct inst db_Grp4[] = {
536	{ "inc",   TRUE, BYTE, op1(E),   0 },
537	{ "dec",   TRUE, BYTE, op1(E),   0 },
538	{ "",      TRUE, NONE, 0,	 0 },
539	{ "",      TRUE, NONE, 0,	 0 },
540	{ "",      TRUE, NONE, 0,	 0 },
541	{ "",      TRUE, NONE, 0,	 0 },
542	{ "",      TRUE, NONE, 0,	 0 },
543	{ "",      TRUE, NONE, 0,	 0 }
544};
545
546static const struct inst db_Grp5[] = {
547	{ "inc",   TRUE, LONG, op1(E),   0 },
548	{ "dec",   TRUE, LONG, op1(E),   0 },
549	{ "call",  TRUE, LONG, op1(Eind),0 },
550	{ "lcall", TRUE, LONG, op1(Eind),0 },
551	{ "jmp",   TRUE, LONG, op1(Eind),0 },
552	{ "ljmp",  TRUE, LONG, op1(Eind),0 },
553	{ "push",  TRUE, LONG, op1(E),   0 },
554	{ "",      TRUE, NONE, 0,	 0 }
555};
556
557static const struct inst db_inst_table[256] = {
558/*00*/	{ "add",   TRUE,  BYTE,  op2(R, E),  0 },
559/*01*/	{ "add",   TRUE,  LONG,  op2(R, E),  0 },
560/*02*/	{ "add",   TRUE,  BYTE,  op2(E, R),  0 },
561/*03*/	{ "add",   TRUE,  LONG,  op2(E, R),  0 },
562/*04*/	{ "add",   FALSE, BYTE,  op2(I, A),  0 },
563/*05*/	{ "add",   FALSE, LONG,  op2(Is, A), 0 },
564/*06*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
565/*07*/	{ "pop",   FALSE, NONE,  op1(Si),    0 },
566
567/*08*/	{ "or",    TRUE,  BYTE,  op2(R, E),  0 },
568/*09*/	{ "or",    TRUE,  LONG,  op2(R, E),  0 },
569/*0a*/	{ "or",    TRUE,  BYTE,  op2(E, R),  0 },
570/*0b*/	{ "or",    TRUE,  LONG,  op2(E, R),  0 },
571/*0c*/	{ "or",    FALSE, BYTE,  op2(I, A),  0 },
572/*0d*/	{ "or",    FALSE, LONG,  op2(I, A),  0 },
573/*0e*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
574/*0f*/	{ "",      FALSE, NONE,  0,	     0 },
575
576/*10*/	{ "adc",   TRUE,  BYTE,  op2(R, E),  0 },
577/*11*/	{ "adc",   TRUE,  LONG,  op2(R, E),  0 },
578/*12*/	{ "adc",   TRUE,  BYTE,  op2(E, R),  0 },
579/*13*/	{ "adc",   TRUE,  LONG,  op2(E, R),  0 },
580/*14*/	{ "adc",   FALSE, BYTE,  op2(I, A),  0 },
581/*15*/	{ "adc",   FALSE, LONG,  op2(Is, A), 0 },
582/*16*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
583/*17*/	{ "pop",   FALSE, NONE,  op1(Si),    0 },
584
585/*18*/	{ "sbb",   TRUE,  BYTE,  op2(R, E),  0 },
586/*19*/	{ "sbb",   TRUE,  LONG,  op2(R, E),  0 },
587/*1a*/	{ "sbb",   TRUE,  BYTE,  op2(E, R),  0 },
588/*1b*/	{ "sbb",   TRUE,  LONG,  op2(E, R),  0 },
589/*1c*/	{ "sbb",   FALSE, BYTE,  op2(I, A),  0 },
590/*1d*/	{ "sbb",   FALSE, LONG,  op2(Is, A), 0 },
591/*1e*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
592/*1f*/	{ "pop",   FALSE, NONE,  op1(Si),    0 },
593
594/*20*/	{ "and",   TRUE,  BYTE,  op2(R, E),  0 },
595/*21*/	{ "and",   TRUE,  LONG,  op2(R, E),  0 },
596/*22*/	{ "and",   TRUE,  BYTE,  op2(E, R),  0 },
597/*23*/	{ "and",   TRUE,  LONG,  op2(E, R),  0 },
598/*24*/	{ "and",   FALSE, BYTE,  op2(I, A),  0 },
599/*25*/	{ "and",   FALSE, LONG,  op2(I, A),  0 },
600/*26*/	{ "",      FALSE, NONE,  0,	     0 },
601/*27*/	{ "daa",   FALSE, NONE,  0,	     0 },
602
603/*28*/	{ "sub",   TRUE,  BYTE,  op2(R, E),  0 },
604/*29*/	{ "sub",   TRUE,  LONG,  op2(R, E),  0 },
605/*2a*/	{ "sub",   TRUE,  BYTE,  op2(E, R),  0 },
606/*2b*/	{ "sub",   TRUE,  LONG,  op2(E, R),  0 },
607/*2c*/	{ "sub",   FALSE, BYTE,  op2(I, A),  0 },
608/*2d*/	{ "sub",   FALSE, LONG,  op2(Is, A), 0 },
609/*2e*/	{ "",      FALSE, NONE,  0,	     0 },
610/*2f*/	{ "das",   FALSE, NONE,  0,	     0 },
611
612/*30*/	{ "xor",   TRUE,  BYTE,  op2(R, E),  0 },
613/*31*/	{ "xor",   TRUE,  LONG,  op2(R, E),  0 },
614/*32*/	{ "xor",   TRUE,  BYTE,  op2(E, R),  0 },
615/*33*/	{ "xor",   TRUE,  LONG,  op2(E, R),  0 },
616/*34*/	{ "xor",   FALSE, BYTE,  op2(I, A),  0 },
617/*35*/	{ "xor",   FALSE, LONG,  op2(I, A),  0 },
618/*36*/	{ "",      FALSE, NONE,  0,	     0 },
619/*37*/	{ "aaa",   FALSE, NONE,  0,	     0 },
620
621/*38*/	{ "cmp",   TRUE,  BYTE,  op2(R, E),  0 },
622/*39*/	{ "cmp",   TRUE,  LONG,  op2(R, E),  0 },
623/*3a*/	{ "cmp",   TRUE,  BYTE,  op2(E, R),  0 },
624/*3b*/	{ "cmp",   TRUE,  LONG,  op2(E, R),  0 },
625/*3c*/	{ "cmp",   FALSE, BYTE,  op2(I, A),  0 },
626/*3d*/	{ "cmp",   FALSE, LONG,  op2(Is, A), 0 },
627/*3e*/	{ "",      FALSE, NONE,  0,	     0 },
628/*3f*/	{ "aas",   FALSE, NONE,  0,	     0 },
629
630/*40*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
631/*41*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
632/*42*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
633/*43*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
634/*44*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
635/*45*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
636/*46*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
637/*47*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
638
639/*48*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
640/*49*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
641/*4a*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
642/*4b*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
643/*4c*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
644/*4d*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
645/*4e*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
646/*4f*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
647
648/*50*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
649/*51*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
650/*52*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
651/*53*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
652/*54*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
653/*55*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
654/*56*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
655/*57*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
656
657/*58*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
658/*59*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
659/*5a*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
660/*5b*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
661/*5c*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
662/*5d*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
663/*5e*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
664/*5f*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
665
666/*60*/	{ "pusha", FALSE, LONG,  0,	     0 },
667/*61*/	{ "popa",  FALSE, LONG,  0,	     0 },
668/*62*/  { "bound", TRUE,  LONG,  op2(E, R),  0 },
669/*63*/	{ "arpl",  TRUE,  NONE,  op2(Rw,Ew), 0 },
670
671/*64*/	{ "",      FALSE, NONE,  0,	     0 },
672/*65*/	{ "",      FALSE, NONE,  0,	     0 },
673/*66*/	{ "",      FALSE, NONE,  0,	     0 },
674/*67*/	{ "",      FALSE, NONE,  0,	     0 },
675
676/*68*/	{ "push",  FALSE, LONG,  op1(I),     0 },
677/*69*/  { "imul",  TRUE,  LONG,  op3(I,E,R), 0 },
678/*6a*/	{ "push",  FALSE, LONG,  op1(Ibs),   0 },
679/*6b*/  { "imul",  TRUE,  LONG,  op3(Ibs,E,R),0 },
680/*6c*/	{ "ins",   FALSE, BYTE,  op2(DX, DI), 0 },
681/*6d*/	{ "ins",   FALSE, LONG,  op2(DX, DI), 0 },
682/*6e*/	{ "outs",  FALSE, BYTE,  op2(SI, DX), 0 },
683/*6f*/	{ "outs",  FALSE, LONG,  op2(SI, DX), 0 },
684
685/*70*/	{ "jo",    FALSE, NONE,  op1(Db),     0 },
686/*71*/	{ "jno",   FALSE, NONE,  op1(Db),     0 },
687/*72*/	{ "jb",    FALSE, NONE,  op1(Db),     0 },
688/*73*/	{ "jnb",   FALSE, NONE,  op1(Db),     0 },
689/*74*/	{ "jz",    FALSE, NONE,  op1(Db),     0 },
690/*75*/	{ "jnz",   FALSE, NONE,  op1(Db),     0 },
691/*76*/	{ "jbe",   FALSE, NONE,  op1(Db),     0 },
692/*77*/	{ "jnbe",  FALSE, NONE,  op1(Db),     0 },
693
694/*78*/	{ "js",    FALSE, NONE,  op1(Db),     0 },
695/*79*/	{ "jns",   FALSE, NONE,  op1(Db),     0 },
696/*7a*/	{ "jp",    FALSE, NONE,  op1(Db),     0 },
697/*7b*/	{ "jnp",   FALSE, NONE,  op1(Db),     0 },
698/*7c*/	{ "jl",    FALSE, NONE,  op1(Db),     0 },
699/*7d*/	{ "jnl",   FALSE, NONE,  op1(Db),     0 },
700/*7e*/	{ "jle",   FALSE, NONE,  op1(Db),     0 },
701/*7f*/	{ "jnle",  FALSE, NONE,  op1(Db),     0 },
702
703/*80*/  { "",	   TRUE,  BYTE,  op2(I, E),   db_Grp1 },
704/*81*/  { "",	   TRUE,  LONG,  op2(I, E),   db_Grp1 },
705/*82*/  { "",	   TRUE,  BYTE,  op2(I, E),   db_Grp1 },
706/*83*/  { "",	   TRUE,  LONG,  op2(Ibs,E),  db_Grp1 },
707/*84*/	{ "test",  TRUE,  BYTE,  op2(R, E),   0 },
708/*85*/	{ "test",  TRUE,  LONG,  op2(R, E),   0 },
709/*86*/	{ "xchg",  TRUE,  BYTE,  op2(R, E),   0 },
710/*87*/	{ "xchg",  TRUE,  LONG,  op2(R, E),   0 },
711
712/*88*/	{ "mov",   TRUE,  BYTE,  op2(R, E),   0 },
713/*89*/	{ "mov",   TRUE,  LONG,  op2(R, E),   0 },
714/*8a*/	{ "mov",   TRUE,  BYTE,  op2(E, R),   0 },
715/*8b*/	{ "mov",   TRUE,  LONG,  op2(E, R),   0 },
716/*8c*/  { "mov",   TRUE,  NONE,  op2(S, Ew),  0 },
717/*8d*/	{ "lea",   TRUE,  LONG,  op2(E, R),   0 },
718/*8e*/	{ "mov",   TRUE,  NONE,  op2(Ew, S),  0 },
719/*8f*/	{ "pop",   TRUE,  LONG,  op1(E),      0 },
720
721/*90*/	{ "nop",   FALSE, NONE,  0,	      0 },
722/*91*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
723/*92*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
724/*93*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
725/*94*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
726/*95*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
727/*96*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
728/*97*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
729
730/*98*/	{ "cbw",   FALSE, SDEP,  0,	      "cwde" },	/* cbw/cwde */
731/*99*/	{ "cwd",   FALSE, SDEP,  0,	      "cdq"  },	/* cwd/cdq */
732/*9a*/	{ "lcall", FALSE, NONE,  op1(OS),     0 },
733/*9b*/	{ "wait",  FALSE, NONE,  0,	      0 },
734/*9c*/	{ "pushf", FALSE, LONG,  0,	      0 },
735/*9d*/	{ "popf",  FALSE, LONG,  0,	      0 },
736/*9e*/	{ "sahf",  FALSE, NONE,  0,	      0 },
737/*9f*/	{ "lahf",  FALSE, NONE,  0,	      0 },
738
739/*a0*/	{ "mov",   FALSE, BYTE,  op2(O, A),   0 },
740/*a1*/	{ "mov",   FALSE, LONG,  op2(O, A),   0 },
741/*a2*/	{ "mov",   FALSE, BYTE,  op2(A, O),   0 },
742/*a3*/	{ "mov",   FALSE, LONG,  op2(A, O),   0 },
743/*a4*/	{ "movs",  FALSE, BYTE,  op2(SI,DI),  0 },
744/*a5*/	{ "movs",  FALSE, LONG,  op2(SI,DI),  0 },
745/*a6*/	{ "cmps",  FALSE, BYTE,  op2(SI,DI),  0 },
746/*a7*/	{ "cmps",  FALSE, LONG,  op2(SI,DI),  0 },
747
748/*a8*/	{ "test",  FALSE, BYTE,  op2(I, A),   0 },
749/*a9*/	{ "test",  FALSE, LONG,  op2(I, A),   0 },
750/*aa*/	{ "stos",  FALSE, BYTE,  op1(DI),     0 },
751/*ab*/	{ "stos",  FALSE, LONG,  op1(DI),     0 },
752/*ac*/	{ "lods",  FALSE, BYTE,  op1(SI),     0 },
753/*ad*/	{ "lods",  FALSE, LONG,  op1(SI),     0 },
754/*ae*/	{ "scas",  FALSE, BYTE,  op1(SI),     0 },
755/*af*/	{ "scas",  FALSE, LONG,  op1(SI),     0 },
756
757/*b0*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
758/*b1*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
759/*b2*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
760/*b3*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
761/*b4*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
762/*b5*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
763/*b6*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
764/*b7*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
765
766/*b8*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
767/*b9*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
768/*ba*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
769/*bb*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
770/*bc*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
771/*bd*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
772/*be*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
773/*bf*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
774
775/*c0*/	{ "",	   TRUE,  BYTE,  op2(Ib, E),  db_Grp2 },
776/*c1*/	{ "",	   TRUE,  LONG,  op2(Ib, E),  db_Grp2 },
777/*c2*/	{ "ret",   FALSE, NONE,  op1(Iw),     0 },
778/*c3*/	{ "ret",   FALSE, NONE,  0,	      0 },
779/*c4*/	{ "les",   TRUE,  LONG,  op2(E, R),   0 },
780/*c5*/	{ "lds",   TRUE,  LONG,  op2(E, R),   0 },
781/*c6*/	{ "mov",   TRUE,  BYTE,  op2(I, E),   0 },
782/*c7*/	{ "mov",   TRUE,  LONG,  op2(I, E),   0 },
783
784/*c8*/	{ "enter", FALSE, NONE,  op2(Iw, Ib), 0 },
785/*c9*/	{ "leave", FALSE, NONE,  0,           0 },
786/*ca*/	{ "lret",  FALSE, NONE,  op1(Iw),     0 },
787/*cb*/	{ "lret",  FALSE, NONE,  0,	      0 },
788/*cc*/	{ "int",   FALSE, NONE,  op1(o3),     0 },
789/*cd*/	{ "int",   FALSE, NONE,  op1(Ib),     0 },
790/*ce*/	{ "into",  FALSE, NONE,  0,	      0 },
791/*cf*/	{ "iret",  FALSE, NONE,  0,	      0 },
792
793/*d0*/	{ "",	   TRUE,  BYTE,  op2(o1, E),  db_Grp2 },
794/*d1*/	{ "",	   TRUE,  LONG,  op2(o1, E),  db_Grp2 },
795/*d2*/	{ "",	   TRUE,  BYTE,  op2(CL, E),  db_Grp2 },
796/*d3*/	{ "",	   TRUE,  LONG,  op2(CL, E),  db_Grp2 },
797/*d4*/	{ "aam",   FALSE, NONE,  op1(Iba),    0 },
798/*d5*/	{ "aad",   FALSE, NONE,  op1(Iba),    0 },
799/*d6*/	{ ".byte\t0xd6", FALSE, NONE, 0,      0 },
800/*d7*/	{ "xlat",  FALSE, BYTE,  op1(BX),     0 },
801
802/*d8*/  { "",      TRUE,  NONE,  0,	      db_Esc8 },
803/*d9*/  { "",      TRUE,  NONE,  0,	      db_Esc9 },
804/*da*/  { "",      TRUE,  NONE,  0,	      db_Esca },
805/*db*/  { "",      TRUE,  NONE,  0,	      db_Escb },
806/*dc*/  { "",      TRUE,  NONE,  0,	      db_Escc },
807/*dd*/  { "",      TRUE,  NONE,  0,	      db_Escd },
808/*de*/  { "",      TRUE,  NONE,  0,	      db_Esce },
809/*df*/  { "",      TRUE,  NONE,  0,	      db_Escf },
810
811/*e0*/	{ "loopne",FALSE, NONE,  op1(Db),     0 },
812/*e1*/	{ "loope", FALSE, NONE,  op1(Db),     0 },
813/*e2*/	{ "loop",  FALSE, NONE,  op1(Db),     0 },
814/*e3*/	{ "jcxz",  FALSE, SDEP,  op1(Db),     "jecxz" },
815/*e4*/	{ "in",    FALSE, BYTE,  op2(Ib, A),  0 },
816/*e5*/	{ "in",    FALSE, LONG,  op2(Ib, A) , 0 },
817/*e6*/	{ "out",   FALSE, BYTE,  op2(A, Ib),  0 },
818/*e7*/	{ "out",   FALSE, LONG,  op2(A, Ib) , 0 },
819
820/*e8*/	{ "call",  FALSE, NONE,  op1(Dl),     0 },
821/*e9*/	{ "jmp",   FALSE, NONE,  op1(Dl),     0 },
822/*ea*/	{ "ljmp",  FALSE, NONE,  op1(OS),     0 },
823/*eb*/	{ "jmp",   FALSE, NONE,  op1(Db),     0 },
824/*ec*/	{ "in",    FALSE, BYTE,  op2(DX, A),  0 },
825/*ed*/	{ "in",    FALSE, LONG,  op2(DX, A) , 0 },
826/*ee*/	{ "out",   FALSE, BYTE,  op2(A, DX),  0 },
827/*ef*/	{ "out",   FALSE, LONG,  op2(A, DX) , 0 },
828
829/*f0*/	{ "",      FALSE, NONE,  0,	     0 },
830/*f1*/	{ ".byte\t0xf1", FALSE, NONE, 0,     0 },
831/*f2*/	{ "",      FALSE, NONE,  0,	     0 },
832/*f3*/	{ "",      FALSE, NONE,  0,	     0 },
833/*f4*/	{ "hlt",   FALSE, NONE,  0,	     0 },
834/*f5*/	{ "cmc",   FALSE, NONE,  0,	     0 },
835/*f6*/	{ "",      TRUE,  BYTE,  0,	     db_Grp3 },
836/*f7*/	{ "",	   TRUE,  LONG,  0,	     db_Grp3 },
837
838/*f8*/	{ "clc",   FALSE, NONE,  0,	     0 },
839/*f9*/	{ "stc",   FALSE, NONE,  0,	     0 },
840/*fa*/	{ "cli",   FALSE, NONE,  0,	     0 },
841/*fb*/	{ "sti",   FALSE, NONE,  0,	     0 },
842/*fc*/	{ "cld",   FALSE, NONE,  0,	     0 },
843/*fd*/	{ "std",   FALSE, NONE,  0,	     0 },
844/*fe*/	{ "",	   TRUE,  NONE,  0,	     db_Grp4 },
845/*ff*/	{ "",	   TRUE,  NONE,  0,	     db_Grp5 },
846};
847
848static const struct inst db_bad_inst =
849	{ "???",   FALSE, NONE,  0,	      0 }
850;
851
852#define	f_mod(byte)	((byte)>>6)
853#define	f_reg(byte)	(((byte)>>3)&0x7)
854#define	f_rm(byte)	((byte)&0x7)
855
856#define	sib_ss(byte)	((byte)>>6)
857#define	sib_index(byte)	(((byte)>>3)&0x7)
858#define	sib_base(byte)	((byte)&0x7)
859
860struct i_addr {
861	int		is_reg;	/* if reg, reg number is in 'disp' */
862	int		disp;
863	const char *	base;
864	const char *	index;
865	int		ss;
866};
867
868static const char * const db_index_reg_16[8] = {
869	"%bx,%si",
870	"%bx,%di",
871	"%bp,%si",
872	"%bp,%di",
873	"%si",
874	"%di",
875	"%bp",
876	"%bx"
877};
878
879static const char * const db_reg[3][8] = {
880	{ "%al",  "%cl",  "%dl",  "%bl",  "%ah",  "%ch",  "%dh",  "%bh" },
881	{ "%ax",  "%cx",  "%dx",  "%bx",  "%sp",  "%bp",  "%si",  "%di" },
882	{ "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
883};
884
885static const char * const db_seg_reg[8] = {
886	"%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
887};
888
889/*
890 * lengths for size attributes
891 */
892static const int db_lengths[] = {
893	1,	/* BYTE */
894	2,	/* WORD */
895	4,	/* LONG */
896	8,	/* QUAD */
897	4,	/* SNGL */
898	8,	/* DBLR */
899	10,	/* EXTR */
900};
901
902#define	get_value_inc(result, loc, size, is_signed) \
903	result = db_get_value((loc), (size), (is_signed)); \
904	(loc) += (size);
905
906static db_addr_t
907		db_disasm_esc(db_addr_t loc, int inst, int short_addr,
908		    int size, const char *seg);
909static void	db_print_address(const char *seg, int size,
910		    struct i_addr *addrp);
911static db_addr_t
912		db_read_address(db_addr_t loc, int short_addr, int regmodrm,
913		    struct i_addr *addrp);
914
915/*
916 * Read address at location and return updated location.
917 */
918static db_addr_t
919db_read_address(loc, short_addr, regmodrm, addrp)
920	db_addr_t	loc;
921	int		short_addr;
922	int		regmodrm;
923	struct i_addr *	addrp;		/* out */
924{
925	int		mod, rm, sib, index, disp;
926
927	mod = f_mod(regmodrm);
928	rm  = f_rm(regmodrm);
929
930	if (mod == 3) {
931	    addrp->is_reg = TRUE;
932	    addrp->disp = rm;
933	    return (loc);
934	}
935	addrp->is_reg = FALSE;
936	addrp->index = 0;
937
938	if (short_addr) {
939	    addrp->index = 0;
940	    addrp->ss = 0;
941	    switch (mod) {
942		case 0:
943		    if (rm == 6) {
944			get_value_inc(disp, loc, 2, FALSE);
945			addrp->disp = disp;
946			addrp->base = 0;
947		    }
948		    else {
949			addrp->disp = 0;
950			addrp->base = db_index_reg_16[rm];
951		    }
952		    break;
953		case 1:
954		    get_value_inc(disp, loc, 1, TRUE);
955		    disp &= 0xFFFF;
956		    addrp->disp = disp;
957		    addrp->base = db_index_reg_16[rm];
958		    break;
959		case 2:
960		    get_value_inc(disp, loc, 2, FALSE);
961		    addrp->disp = disp;
962		    addrp->base = db_index_reg_16[rm];
963		    break;
964	    }
965	}
966	else {
967	    if (mod != 3 && rm == 4) {
968		get_value_inc(sib, loc, 1, FALSE);
969		rm = sib_base(sib);
970		index = sib_index(sib);
971		if (index != 4)
972		    addrp->index = db_reg[LONG][index];
973		addrp->ss = sib_ss(sib);
974	    }
975
976	    switch (mod) {
977		case 0:
978		    if (rm == 5) {
979			get_value_inc(addrp->disp, loc, 4, FALSE);
980			addrp->base = 0;
981		    }
982		    else {
983			addrp->disp = 0;
984			addrp->base = db_reg[LONG][rm];
985		    }
986		    break;
987
988		case 1:
989		    get_value_inc(disp, loc, 1, TRUE);
990		    addrp->disp = disp;
991		    addrp->base = db_reg[LONG][rm];
992		    break;
993
994		case 2:
995		    get_value_inc(disp, loc, 4, FALSE);
996		    addrp->disp = disp;
997		    addrp->base = db_reg[LONG][rm];
998		    break;
999	    }
1000	}
1001	return (loc);
1002}
1003
1004static void
1005db_print_address(seg, size, addrp)
1006	const char *	seg;
1007	int		size;
1008	struct i_addr *	addrp;
1009{
1010	if (addrp->is_reg) {
1011	    db_printf("%s", db_reg[size][addrp->disp]);
1012	    return;
1013	}
1014
1015	if (seg) {
1016	    db_printf("%s:", seg);
1017	}
1018
1019	db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
1020	if (addrp->base != 0 || addrp->index != 0) {
1021	    db_printf("(");
1022	    if (addrp->base)
1023		db_printf("%s", addrp->base);
1024	    if (addrp->index)
1025		db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
1026	    db_printf(")");
1027	}
1028}
1029
1030/*
1031 * Disassemble floating-point ("escape") instruction
1032 * and return updated location.
1033 */
1034static db_addr_t
1035db_disasm_esc(loc, inst, short_addr, size, seg)
1036	db_addr_t	loc;
1037	int		inst;
1038	int		short_addr;
1039	int		size;
1040	const char *	seg;
1041{
1042	int		regmodrm;
1043	const struct finst *	fp;
1044	int		mod;
1045	struct i_addr	address;
1046	const char *	name;
1047
1048	get_value_inc(regmodrm, loc, 1, FALSE);
1049	fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1050	mod = f_mod(regmodrm);
1051	if (mod != 3) {
1052	    if (*fp->f_name == '\0') {
1053		db_printf("<bad instruction>");
1054		return (loc);
1055	    }
1056	    /*
1057	     * Normal address modes.
1058	     */
1059	    loc = db_read_address(loc, short_addr, regmodrm, &address);
1060	    db_printf("%s", fp->f_name);
1061	    switch(fp->f_size) {
1062		case SNGL:
1063		    db_printf("s");
1064		    break;
1065		case DBLR:
1066		    db_printf("l");
1067		    break;
1068		case EXTR:
1069		    db_printf("t");
1070		    break;
1071		case WORD:
1072		    db_printf("s");
1073		    break;
1074		case LONG:
1075		    db_printf("l");
1076		    break;
1077		case QUAD:
1078		    db_printf("q");
1079		    break;
1080		default:
1081		    break;
1082	    }
1083	    db_printf("\t");
1084	    db_print_address(seg, BYTE, &address);
1085	}
1086	else {
1087	    /*
1088	     * 'reg-reg' - special formats
1089	     */
1090	    switch (fp->f_rrmode) {
1091		case op2(ST,STI):
1092		    name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1093		    db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1094		    break;
1095		case op2(STI,ST):
1096		    name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1097		    db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1098		    break;
1099		case op1(STI):
1100		    name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1101		    db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
1102		    break;
1103		case op1(X):
1104		    name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1105		    if (*name == '\0')
1106			goto bad;
1107		    db_printf("%s", name);
1108		    break;
1109		case op1(XA):
1110		    name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1111		    if (*name == '\0')
1112			goto bad;
1113		    db_printf("%s\t%%ax", name);
1114		    break;
1115		default:
1116		bad:
1117		    db_printf("<bad instruction>");
1118		    break;
1119	    }
1120	}
1121
1122	return (loc);
1123}
1124
1125/*
1126 * Disassemble instruction at 'loc'.  'altfmt' specifies an
1127 * (optional) alternate format.  Return address of start of
1128 * next instruction.
1129 */
1130db_addr_t
1131db_disasm(loc, altfmt)
1132	db_addr_t	loc;
1133	boolean_t	altfmt;
1134{
1135	int	inst;
1136	int	size;
1137	int	short_addr;
1138	const char *	seg;
1139	const struct inst *	ip;
1140	const char *	i_name;
1141	int	i_size;
1142	int	i_mode;
1143	int	regmodrm = 0;
1144	boolean_t	first;
1145	int	displ;
1146	int	prefix;
1147	int	rep;
1148	int	imm;
1149	int	imm2;
1150	int	len;
1151	struct i_addr	address;
1152
1153	get_value_inc(inst, loc, 1, FALSE);
1154	short_addr = FALSE;
1155	size = LONG;
1156	seg = 0;
1157
1158	/*
1159	 * Get prefixes
1160	 */
1161	rep = FALSE;
1162	prefix = TRUE;
1163	do {
1164	    switch (inst) {
1165		case 0x66:		/* data16 */
1166		    size = WORD;
1167		    break;
1168		case 0x67:
1169		    short_addr = TRUE;
1170		    break;
1171		case 0x26:
1172		    seg = "%es";
1173		    break;
1174		case 0x36:
1175		    seg = "%ss";
1176		    break;
1177		case 0x2e:
1178		    seg = "%cs";
1179		    break;
1180		case 0x3e:
1181		    seg = "%ds";
1182		    break;
1183		case 0x64:
1184		    seg = "%fs";
1185		    break;
1186		case 0x65:
1187		    seg = "%gs";
1188		    break;
1189		case 0xf0:
1190		    db_printf("lock ");
1191		    break;
1192		case 0xf2:
1193		    db_printf("repne ");
1194		    break;
1195		case 0xf3:
1196		    rep = TRUE;
1197		    break;
1198		default:
1199		    prefix = FALSE;
1200		    break;
1201	    }
1202	    if (prefix) {
1203		get_value_inc(inst, loc, 1, FALSE);
1204	    }
1205	    if (rep == TRUE) {
1206		if (inst == 0x90) {
1207		    db_printf("pause\n");
1208		    return (loc);
1209		}
1210		db_printf("repe ");	/* XXX repe VS rep */
1211		rep = FALSE;
1212	    }
1213	} while (prefix);
1214
1215	if (inst >= 0xd8 && inst <= 0xdf) {
1216	    loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1217	    db_printf("\n");
1218	    return (loc);
1219	}
1220
1221	if (inst == 0x0f) {
1222	    get_value_inc(inst, loc, 1, FALSE);
1223	    ip = db_inst_0f[inst>>4];
1224	    if (ip == 0) {
1225		ip = &db_bad_inst;
1226	    }
1227	    else {
1228		ip = &ip[inst&0xf];
1229	    }
1230	}
1231	else
1232	    ip = &db_inst_table[inst];
1233
1234	if (ip->i_has_modrm) {
1235	    get_value_inc(regmodrm, loc, 1, FALSE);
1236	    loc = db_read_address(loc, short_addr, regmodrm, &address);
1237	}
1238
1239	i_name = ip->i_name;
1240	i_size = ip->i_size;
1241	i_mode = ip->i_mode;
1242
1243	if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1244	    ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1245	    ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 ||
1246	    ip->i_extra == db_Grp15) {
1247	    i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1248	}
1249	else if (ip->i_extra == db_Grp3) {
1250	    ip = ip->i_extra;
1251	    ip = &ip[f_reg(regmodrm)];
1252	    i_name = ip->i_name;
1253	    i_mode = ip->i_mode;
1254	}
1255	else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1256	    ip = ip->i_extra;
1257	    ip = &ip[f_reg(regmodrm)];
1258	    i_name = ip->i_name;
1259	    i_mode = ip->i_mode;
1260	    i_size = ip->i_size;
1261	}
1262
1263	/* Special cases that don't fit well in the tables. */
1264	if (ip->i_extra == db_Grp7 && f_mod(regmodrm) == 3) {
1265		switch (regmodrm) {
1266		case 0xc8:
1267			i_name = "monitor";
1268			i_size = NONE;
1269			i_mode = 0;
1270			break;
1271		case 0xc9:
1272			i_name = "mwait";
1273			i_size = NONE;
1274			i_mode = 0;
1275			break;
1276		}
1277	}
1278	if (ip->i_extra == db_Grp15 && f_mod(regmodrm) == 3) {
1279		i_name = db_Grp15b[f_reg(regmodrm)];
1280		i_size = NONE;
1281		i_mode = 0;
1282	}
1283
1284	if (i_size == SDEP) {
1285	    if (size == WORD)
1286		db_printf("%s", i_name);
1287	    else
1288		db_printf("%s", (const char *)ip->i_extra);
1289	}
1290	else {
1291	    db_printf("%s", i_name);
1292	    if (i_size != NONE) {
1293		if (i_size == BYTE) {
1294		    db_printf("b");
1295		    size = BYTE;
1296		}
1297		else if (i_size == WORD) {
1298		    db_printf("w");
1299		    size = WORD;
1300		}
1301		else if (size == WORD)
1302		    db_printf("w");
1303		else
1304		    db_printf("l");
1305	    }
1306	}
1307	db_printf("\t");
1308	for (first = TRUE;
1309	     i_mode != 0;
1310	     i_mode >>= 8, first = FALSE)
1311	{
1312	    if (!first)
1313		db_printf(",");
1314
1315	    switch (i_mode & 0xFF) {
1316
1317		case E:
1318		    db_print_address(seg, size, &address);
1319		    break;
1320
1321		case Eind:
1322		    db_printf("*");
1323		    db_print_address(seg, size, &address);
1324		    break;
1325
1326		case El:
1327		    db_print_address(seg, LONG, &address);
1328		    break;
1329
1330		case Ew:
1331		    db_print_address(seg, WORD, &address);
1332		    break;
1333
1334		case Eb:
1335		    db_print_address(seg, BYTE, &address);
1336		    break;
1337
1338		case R:
1339		    db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1340		    break;
1341
1342		case Rw:
1343		    db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1344		    break;
1345
1346		case Ri:
1347		    db_printf("%s", db_reg[size][f_rm(inst)]);
1348		    break;
1349
1350		case Ril:
1351		    db_printf("%s", db_reg[LONG][f_rm(inst)]);
1352		    break;
1353
1354		case S:
1355		    db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1356		    break;
1357
1358		case Si:
1359		    db_printf("%s", db_seg_reg[f_reg(inst)]);
1360		    break;
1361
1362		case A:
1363		    db_printf("%s", db_reg[size][0]);	/* acc */
1364		    break;
1365
1366		case BX:
1367		    if (seg)
1368			db_printf("%s:", seg);
1369		    db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1370		    break;
1371
1372		case CL:
1373		    db_printf("%%cl");
1374		    break;
1375
1376		case DX:
1377		    db_printf("%%dx");
1378		    break;
1379
1380		case SI:
1381		    if (seg)
1382			db_printf("%s:", seg);
1383		    db_printf("(%s)", short_addr ? "%si" : "%esi");
1384		    break;
1385
1386		case DI:
1387		    db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
1388		    break;
1389
1390		case CR:
1391		    db_printf("%%cr%d", f_reg(regmodrm));
1392		    break;
1393
1394		case DR:
1395		    db_printf("%%dr%d", f_reg(regmodrm));
1396		    break;
1397
1398		case TR:
1399		    db_printf("%%tr%d", f_reg(regmodrm));
1400		    break;
1401
1402		case I:
1403		    len = db_lengths[size];
1404		    get_value_inc(imm, loc, len, FALSE);
1405		    db_printf("$%#r", imm);
1406		    break;
1407
1408		case Is:
1409		    len = db_lengths[size];
1410		    get_value_inc(imm, loc, len, FALSE);
1411		    db_printf("$%+#r", imm);
1412		    break;
1413
1414		case Ib:
1415		    get_value_inc(imm, loc, 1, FALSE);
1416		    db_printf("$%#r", imm);
1417		    break;
1418
1419		case Iba:
1420		    get_value_inc(imm, loc, 1, FALSE);
1421		    if (imm != 0x0a)
1422			db_printf("$%#r", imm);
1423		    break;
1424
1425		case Ibs:
1426		    get_value_inc(imm, loc, 1, TRUE);
1427		    if (size == WORD)
1428			imm &= 0xFFFF;
1429		    db_printf("$%+#r", imm);
1430		    break;
1431
1432		case Iw:
1433		    get_value_inc(imm, loc, 2, FALSE);
1434		    db_printf("$%#r", imm);
1435		    break;
1436
1437		case O:
1438		    len = (short_addr ? 2 : 4);
1439		    get_value_inc(displ, loc, len, FALSE);
1440		    if (seg)
1441			db_printf("%s:%+#r",seg, displ);
1442		    else
1443			db_printsym((db_addr_t)displ, DB_STGY_ANY);
1444		    break;
1445
1446		case Db:
1447		    get_value_inc(displ, loc, 1, TRUE);
1448		    displ += loc;
1449		    if (size == WORD)
1450			displ &= 0xFFFF;
1451		    db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1452		    break;
1453
1454		case Dl:
1455		    len = db_lengths[size];
1456		    get_value_inc(displ, loc, len, FALSE);
1457		    displ += loc;
1458		    if (size == WORD)
1459			displ &= 0xFFFF;
1460		    db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1461		    break;
1462
1463		case o1:
1464		    db_printf("$1");
1465		    break;
1466
1467		case o3:
1468		    db_printf("$3");
1469		    break;
1470
1471		case OS:
1472		    len = db_lengths[size];
1473		    get_value_inc(imm, loc, len, FALSE);	/* offset */
1474		    get_value_inc(imm2, loc, 2, FALSE);	/* segment */
1475		    db_printf("$%#r,%#r", imm2, imm);
1476		    break;
1477	    }
1478	}
1479	db_printf("\n");
1480	return (loc);
1481}
1482