db_disasm.c revision 181603 
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: head/sys/i386/i386/db_disasm.c 181603 2008-08-11 20:10:52Z jhb $");
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 struct inst db_inst_0f0x[] = {
157/*00*/	{ "",	   TRUE,  NONE,  op1(Ew),     db_Grp6 },
158/*01*/	{ "",	   TRUE,  NONE,  op1(Ew),     db_Grp7 },
159/*02*/	{ "lar",   TRUE,  LONG,  op2(E,R),    0 },
160/*03*/	{ "lsl",   TRUE,  LONG,  op2(E,R),    0 },
161/*04*/	{ "",      FALSE, NONE,  0,	      0 },
162/*05*/	{ "",      FALSE, NONE,  0,	      0 },
163/*06*/	{ "clts",  FALSE, NONE,  0,	      0 },
164/*07*/	{ "",      FALSE, NONE,  0,	      0 },
165
166/*08*/	{ "invd",  FALSE, NONE,  0,	      0 },
167/*09*/	{ "wbinvd",FALSE, NONE,  0,	      0 },
168/*0a*/	{ "",      FALSE, NONE,  0,	      0 },
169/*0b*/	{ "",      FALSE, NONE,  0,	      0 },
170/*0c*/	{ "",      FALSE, NONE,  0,	      0 },
171/*0d*/	{ "",      FALSE, NONE,  0,	      0 },
172/*0e*/	{ "",      FALSE, NONE,  0,	      0 },
173/*0f*/	{ "",      FALSE, NONE,  0,	      0 },
174};
175
176static const struct inst db_inst_0f2x[] = {
177/*20*/	{ "mov",   TRUE,  LONG,  op2(CR,El),  0 },
178/*21*/	{ "mov",   TRUE,  LONG,  op2(DR,El),  0 },
179/*22*/	{ "mov",   TRUE,  LONG,  op2(El,CR),  0 },
180/*23*/	{ "mov",   TRUE,  LONG,  op2(El,DR),  0 },
181/*24*/	{ "mov",   TRUE,  LONG,  op2(TR,El),  0 },
182/*25*/	{ "",      FALSE, NONE,  0,	      0 },
183/*26*/	{ "mov",   TRUE,  LONG,  op2(El,TR),  0 },
184/*27*/	{ "",      FALSE, NONE,  0,	      0 },
185
186/*28*/	{ "",      FALSE, NONE,  0,	      0 },
187/*29*/	{ "",      FALSE, NONE,  0,	      0 },
188/*2a*/	{ "",      FALSE, NONE,  0,	      0 },
189/*2b*/	{ "",      FALSE, NONE,  0,	      0 },
190/*2c*/	{ "",      FALSE, NONE,  0,	      0 },
191/*2d*/	{ "",      FALSE, NONE,  0,	      0 },
192/*2e*/	{ "",      FALSE, NONE,  0,	      0 },
193/*2f*/	{ "",      FALSE, NONE,  0,	      0 },
194};
195
196static const struct inst db_inst_0f3x[] = {
197/*30*/	{ "wrmsr", FALSE, NONE,  0,	      0 },
198/*31*/	{ "rdtsc", FALSE, NONE,  0,	      0 },
199/*32*/	{ "rdmsr", FALSE, NONE,  0,	      0 },
200/*33*/	{ "rdpmc", FALSE, NONE,  0,	      0 },
201/*34*/	{ "",	   FALSE, NONE,  0,	      0 },
202/*35*/	{ "",	   FALSE, NONE,  0,	      0 },
203/*36*/	{ "",	   FALSE, NONE,  0,	      0 },
204/*37*/	{ "",	   FALSE, NONE,  0,	      0 },
205
206/*38*/	{ "",	   FALSE, NONE,  0,	      0 },
207/*39*/	{ "",	   FALSE, NONE,  0,	      0 },
208/*3a*/	{ "",	   FALSE, NONE,  0,	      0 },
209/*3b*/	{ "",	   FALSE, NONE,  0,	      0 },
210/*3c*/	{ "",	   FALSE, NONE,  0,	      0 },
211/*3d*/	{ "",	   FALSE, NONE,  0,	      0 },
212/*3e*/	{ "",	   FALSE, NONE,  0,	      0 },
213/*3f*/	{ "",	   FALSE, NONE,  0,	      0 },
214};
215
216static const struct inst db_inst_0f4x[] = {
217/*40*/	{ "cmovo",  TRUE, NONE,  op2(E, R),   0 },
218/*41*/	{ "cmovno", TRUE, NONE,  op2(E, R),   0 },
219/*42*/	{ "cmovb",  TRUE, NONE,  op2(E, R),   0 },
220/*43*/	{ "cmovnb", TRUE, NONE,  op2(E, R),   0 },
221/*44*/	{ "cmovz",  TRUE, NONE,  op2(E, R),   0 },
222/*45*/	{ "cmovnz", TRUE, NONE,  op2(E, R),   0 },
223/*46*/	{ "cmovbe", TRUE, NONE,  op2(E, R),   0 },
224/*47*/	{ "cmovnbe",TRUE, NONE,  op2(E, R),   0 },
225
226/*48*/	{ "cmovs",  TRUE, NONE,  op2(E, R),   0 },
227/*49*/	{ "cmovns", TRUE, NONE,  op2(E, R),   0 },
228/*4a*/	{ "cmovp",  TRUE, NONE,  op2(E, R),   0 },
229/*4b*/	{ "cmovnp", TRUE, NONE,  op2(E, R),   0 },
230/*4c*/	{ "cmovl",  TRUE, NONE,  op2(E, R),   0 },
231/*4d*/	{ "cmovnl", TRUE, NONE,  op2(E, R),   0 },
232/*4e*/	{ "cmovle", TRUE, NONE,  op2(E, R),   0 },
233/*4f*/	{ "cmovnle",TRUE, NONE,  op2(E, R),   0 },
234};
235
236static const struct inst db_inst_0f8x[] = {
237/*80*/	{ "jo",    FALSE, NONE,  op1(Dl),     0 },
238/*81*/	{ "jno",   FALSE, NONE,  op1(Dl),     0 },
239/*82*/	{ "jb",    FALSE, NONE,  op1(Dl),     0 },
240/*83*/	{ "jnb",   FALSE, NONE,  op1(Dl),     0 },
241/*84*/	{ "jz",    FALSE, NONE,  op1(Dl),     0 },
242/*85*/	{ "jnz",   FALSE, NONE,  op1(Dl),     0 },
243/*86*/	{ "jbe",   FALSE, NONE,  op1(Dl),     0 },
244/*87*/	{ "jnbe",  FALSE, NONE,  op1(Dl),     0 },
245
246/*88*/	{ "js",    FALSE, NONE,  op1(Dl),     0 },
247/*89*/	{ "jns",   FALSE, NONE,  op1(Dl),     0 },
248/*8a*/	{ "jp",    FALSE, NONE,  op1(Dl),     0 },
249/*8b*/	{ "jnp",   FALSE, NONE,  op1(Dl),     0 },
250/*8c*/	{ "jl",    FALSE, NONE,  op1(Dl),     0 },
251/*8d*/	{ "jnl",   FALSE, NONE,  op1(Dl),     0 },
252/*8e*/	{ "jle",   FALSE, NONE,  op1(Dl),     0 },
253/*8f*/	{ "jnle",  FALSE, NONE,  op1(Dl),     0 },
254};
255
256static const struct inst db_inst_0f9x[] = {
257/*90*/	{ "seto",  TRUE,  NONE,  op1(Eb),     0 },
258/*91*/	{ "setno", TRUE,  NONE,  op1(Eb),     0 },
259/*92*/	{ "setb",  TRUE,  NONE,  op1(Eb),     0 },
260/*93*/	{ "setnb", TRUE,  NONE,  op1(Eb),     0 },
261/*94*/	{ "setz",  TRUE,  NONE,  op1(Eb),     0 },
262/*95*/	{ "setnz", TRUE,  NONE,  op1(Eb),     0 },
263/*96*/	{ "setbe", TRUE,  NONE,  op1(Eb),     0 },
264/*97*/	{ "setnbe",TRUE,  NONE,  op1(Eb),     0 },
265
266/*98*/	{ "sets",  TRUE,  NONE,  op1(Eb),     0 },
267/*99*/	{ "setns", TRUE,  NONE,  op1(Eb),     0 },
268/*9a*/	{ "setp",  TRUE,  NONE,  op1(Eb),     0 },
269/*9b*/	{ "setnp", TRUE,  NONE,  op1(Eb),     0 },
270/*9c*/	{ "setl",  TRUE,  NONE,  op1(Eb),     0 },
271/*9d*/	{ "setnl", TRUE,  NONE,  op1(Eb),     0 },
272/*9e*/	{ "setle", TRUE,  NONE,  op1(Eb),     0 },
273/*9f*/	{ "setnle",TRUE,  NONE,  op1(Eb),     0 },
274};
275
276static const struct inst db_inst_0fax[] = {
277/*a0*/	{ "push",  FALSE, NONE,  op1(Si),     0 },
278/*a1*/	{ "pop",   FALSE, NONE,  op1(Si),     0 },
279/*a2*/	{ "cpuid", FALSE, NONE,  0,	      0 },
280/*a3*/	{ "bt",    TRUE,  LONG,  op2(R,E),    0 },
281/*a4*/	{ "shld",  TRUE,  LONG,  op3(Ib,R,E), 0 },
282/*a5*/	{ "shld",  TRUE,  LONG,  op3(CL,R,E), 0 },
283/*a6*/	{ "",      FALSE, NONE,  0,	      0 },
284/*a7*/	{ "",      FALSE, NONE,  0,	      0 },
285
286/*a8*/	{ "push",  FALSE, NONE,  op1(Si),     0 },
287/*a9*/	{ "pop",   FALSE, NONE,  op1(Si),     0 },
288/*aa*/	{ "rsm",   FALSE, NONE,  0,	      0 },
289/*ab*/	{ "bts",   TRUE,  LONG,  op2(R,E),    0 },
290/*ac*/	{ "shrd",  TRUE,  LONG,  op3(Ib,R,E), 0 },
291/*ad*/	{ "shrd",  TRUE,  LONG,  op3(CL,R,E), 0 },
292/*a6*/	{ "",      FALSE, NONE,  0,	      0 },
293/*a7*/	{ "imul",  TRUE,  LONG,  op2(E,R),    0 },
294};
295
296static const struct inst db_inst_0fbx[] = {
297/*b0*/	{ "cmpxchg",TRUE, BYTE,	 op2(R, E),   0 },
298/*b0*/	{ "cmpxchg",TRUE, LONG,	 op2(R, E),   0 },
299/*b2*/	{ "lss",   TRUE,  LONG,  op2(E, R),   0 },
300/*b3*/	{ "btr",   TRUE,  LONG,  op2(R, E),   0 },
301/*b4*/	{ "lfs",   TRUE,  LONG,  op2(E, R),   0 },
302/*b5*/	{ "lgs",   TRUE,  LONG,  op2(E, R),   0 },
303/*b6*/	{ "movzb", TRUE,  LONG,  op2(Eb, R),  0 },
304/*b7*/	{ "movzw", TRUE,  LONG,  op2(Ew, R),  0 },
305
306/*b8*/	{ "",      FALSE, NONE,  0,	      0 },
307/*b9*/	{ "",      FALSE, NONE,  0,	      0 },
308/*ba*/	{ "",      TRUE,  LONG,  op2(Ib, E),  db_Grp8 },
309/*bb*/	{ "btc",   TRUE,  LONG,  op2(R, E),   0 },
310/*bc*/	{ "bsf",   TRUE,  LONG,  op2(E, R),   0 },
311/*bd*/	{ "bsr",   TRUE,  LONG,  op2(E, R),   0 },
312/*be*/	{ "movsb", TRUE,  LONG,  op2(Eb, R),  0 },
313/*bf*/	{ "movsw", TRUE,  LONG,  op2(Ew, R),  0 },
314};
315
316static const struct inst db_inst_0fcx[] = {
317/*c0*/	{ "xadd",  TRUE,  BYTE,	 op2(R, E),   0 },
318/*c1*/	{ "xadd",  TRUE,  LONG,	 op2(R, E),   0 },
319/*c2*/	{ "",	   FALSE, NONE,	 0,	      0 },
320/*c3*/	{ "",	   FALSE, NONE,	 0,	      0 },
321/*c4*/	{ "",	   FALSE, NONE,	 0,	      0 },
322/*c5*/	{ "",	   FALSE, NONE,	 0,	      0 },
323/*c6*/	{ "",	   FALSE, NONE,	 0,	      0 },
324/*c7*/	{ "",	   TRUE,  NONE,  op1(E),      db_Grp9 },
325/*c8*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
326/*c9*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
327/*ca*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
328/*cb*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
329/*cc*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
330/*cd*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
331/*ce*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
332/*cf*/	{ "bswap", FALSE, LONG,  op1(Ril),    0 },
333};
334
335static const struct inst * const db_inst_0f[] = {
336	db_inst_0f0x,
337	0,
338	db_inst_0f2x,
339	db_inst_0f3x,
340	db_inst_0f4x,
341	0,
342	0,
343	0,
344	db_inst_0f8x,
345	db_inst_0f9x,
346	db_inst_0fax,
347	db_inst_0fbx,
348	db_inst_0fcx,
349	0,
350	0,
351	0
352};
353
354static const char * const db_Esc92[] = {
355	"fnop",	"",	"",	"",	"",	"",	"",	""
356};
357static const char * const db_Esc94[] = {
358	"fchs",	"fabs",	"",	"",	"ftst",	"fxam",	"",	""
359};
360static const char * const db_Esc95[] = {
361	"fld1",	"fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
362};
363static const char * const db_Esc96[] = {
364	"f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
365	"fincstp"
366};
367static const char * const db_Esc97[] = {
368	"fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
369};
370
371static const char * const db_Esca5[] = {
372	"",	"fucompp","",	"",	"",	"",	"",	""
373};
374
375static const char * const db_Escb4[] = {
376	"fneni","fndisi",	"fnclex","fninit","fsetpm",	"",	"",	""
377};
378
379static const char * const db_Esce3[] = {
380	"",	"fcompp","",	"",	"",	"",	"",	""
381};
382
383static const char * const db_Escf4[] = {
384	"fnstsw","",	"",	"",	"",	"",	"",	""
385};
386
387static const struct finst db_Esc8[] = {
388/*0*/	{ "fadd",   SNGL,  op2(STI,ST),	0 },
389/*1*/	{ "fmul",   SNGL,  op2(STI,ST),	0 },
390/*2*/	{ "fcom",   SNGL,  op2(STI,ST),	0 },
391/*3*/	{ "fcomp",  SNGL,  op2(STI,ST),	0 },
392/*4*/	{ "fsub",   SNGL,  op2(STI,ST),	0 },
393/*5*/	{ "fsubr",  SNGL,  op2(STI,ST),	0 },
394/*6*/	{ "fdiv",   SNGL,  op2(STI,ST),	0 },
395/*7*/	{ "fdivr",  SNGL,  op2(STI,ST),	0 },
396};
397
398static const struct finst db_Esc9[] = {
399/*0*/	{ "fld",    SNGL,  op1(STI),	0 },
400/*1*/	{ "",       NONE,  op1(STI),	"fxch" },
401/*2*/	{ "fst",    SNGL,  op1(X),	db_Esc92 },
402/*3*/	{ "fstp",   SNGL,  0,		0 },
403/*4*/	{ "fldenv", NONE,  op1(X),	db_Esc94 },
404/*5*/	{ "fldcw",  NONE,  op1(X),	db_Esc95 },
405/*6*/	{ "fnstenv",NONE,  op1(X),	db_Esc96 },
406/*7*/	{ "fnstcw", NONE,  op1(X),	db_Esc97 },
407};
408
409static const struct finst db_Esca[] = {
410/*0*/	{ "fiadd",  LONG,  0,		0 },
411/*1*/	{ "fimul",  LONG,  0,		0 },
412/*2*/	{ "ficom",  LONG,  0,		0 },
413/*3*/	{ "ficomp", LONG,  0,		0 },
414/*4*/	{ "fisub",  LONG,  0,		0 },
415/*5*/	{ "fisubr", LONG,  op1(X),	db_Esca5 },
416/*6*/	{ "fidiv",  LONG,  0,		0 },
417/*7*/	{ "fidivr", LONG,  0,		0 }
418};
419
420static const struct finst db_Escb[] = {
421/*0*/	{ "fild",   LONG,  0,		0 },
422/*1*/	{ "",       NONE,  0,		0 },
423/*2*/	{ "fist",   LONG,  0,		0 },
424/*3*/	{ "fistp",  LONG,  0,		0 },
425/*4*/	{ "",       WORD,  op1(X),	db_Escb4 },
426/*5*/	{ "fld",    EXTR,  0,		0 },
427/*6*/	{ "",       WORD,  0,		0 },
428/*7*/	{ "fstp",   EXTR,  0,		0 },
429};
430
431static const struct finst db_Escc[] = {
432/*0*/	{ "fadd",   DBLR,  op2(ST,STI),	0 },
433/*1*/	{ "fmul",   DBLR,  op2(ST,STI),	0 },
434/*2*/	{ "fcom",   DBLR,  0,		0 },
435/*3*/	{ "fcomp",  DBLR,  0,		0 },
436/*4*/	{ "fsub",   DBLR,  op2(ST,STI),	"fsubr" },
437/*5*/	{ "fsubr",  DBLR,  op2(ST,STI),	"fsub" },
438/*6*/	{ "fdiv",   DBLR,  op2(ST,STI),	"fdivr" },
439/*7*/	{ "fdivr",  DBLR,  op2(ST,STI),	"fdiv" },
440};
441
442static const struct finst db_Escd[] = {
443/*0*/	{ "fld",    DBLR,  op1(STI),	"ffree" },
444/*1*/	{ "",       NONE,  0,		0 },
445/*2*/	{ "fst",    DBLR,  op1(STI),	0 },
446/*3*/	{ "fstp",   DBLR,  op1(STI),	0 },
447/*4*/	{ "frstor", NONE,  op1(STI),	"fucom" },
448/*5*/	{ "",       NONE,  op1(STI),	"fucomp" },
449/*6*/	{ "fnsave", NONE,  0,		0 },
450/*7*/	{ "fnstsw", NONE,  0,		0 },
451};
452
453static const struct finst db_Esce[] = {
454/*0*/	{ "fiadd",  WORD,  op2(ST,STI),	"faddp" },
455/*1*/	{ "fimul",  WORD,  op2(ST,STI),	"fmulp" },
456/*2*/	{ "ficom",  WORD,  0,		0 },
457/*3*/	{ "ficomp", WORD,  op1(X),	db_Esce3 },
458/*4*/	{ "fisub",  WORD,  op2(ST,STI),	"fsubrp" },
459/*5*/	{ "fisubr", WORD,  op2(ST,STI),	"fsubp" },
460/*6*/	{ "fidiv",  WORD,  op2(ST,STI),	"fdivrp" },
461/*7*/	{ "fidivr", WORD,  op2(ST,STI),	"fdivp" },
462};
463
464static const struct finst db_Escf[] = {
465/*0*/	{ "fild",   WORD,  0,		0 },
466/*1*/	{ "",       NONE,  0,		0 },
467/*2*/	{ "fist",   WORD,  0,		0 },
468/*3*/	{ "fistp",  WORD,  0,		0 },
469/*4*/	{ "fbld",   NONE,  op1(XA),	db_Escf4 },
470/*5*/	{ "fild",   QUAD,  0,		0 },
471/*6*/	{ "fbstp",  NONE,  0,		0 },
472/*7*/	{ "fistp",  QUAD,  0,		0 },
473};
474
475static const struct finst * const db_Esc_inst[] = {
476	db_Esc8, db_Esc9, db_Esca, db_Escb,
477	db_Escc, db_Escd, db_Esce, db_Escf
478};
479
480static const char * const db_Grp1[] = {
481	"add",
482	"or",
483	"adc",
484	"sbb",
485	"and",
486	"sub",
487	"xor",
488	"cmp"
489};
490
491static const char * const db_Grp2[] = {
492	"rol",
493	"ror",
494	"rcl",
495	"rcr",
496	"shl",
497	"shr",
498	"shl",
499	"sar"
500};
501
502static const struct inst db_Grp3[] = {
503	{ "test",  TRUE, NONE, op2(I,E), 0 },
504	{ "test",  TRUE, NONE, op2(I,E), 0 },
505	{ "not",   TRUE, NONE, op1(E),   0 },
506	{ "neg",   TRUE, NONE, op1(E),   0 },
507	{ "mul",   TRUE, NONE, op2(E,A), 0 },
508	{ "imul",  TRUE, NONE, op2(E,A), 0 },
509	{ "div",   TRUE, NONE, op2(E,A), 0 },
510	{ "idiv",  TRUE, NONE, op2(E,A), 0 },
511};
512
513static const struct inst db_Grp4[] = {
514	{ "inc",   TRUE, BYTE, op1(E),   0 },
515	{ "dec",   TRUE, BYTE, op1(E),   0 },
516	{ "",      TRUE, NONE, 0,	 0 },
517	{ "",      TRUE, NONE, 0,	 0 },
518	{ "",      TRUE, NONE, 0,	 0 },
519	{ "",      TRUE, NONE, 0,	 0 },
520	{ "",      TRUE, NONE, 0,	 0 },
521	{ "",      TRUE, NONE, 0,	 0 }
522};
523
524static const struct inst db_Grp5[] = {
525	{ "inc",   TRUE, LONG, op1(E),   0 },
526	{ "dec",   TRUE, LONG, op1(E),   0 },
527	{ "call",  TRUE, LONG, op1(Eind),0 },
528	{ "lcall", TRUE, LONG, op1(Eind),0 },
529	{ "jmp",   TRUE, LONG, op1(Eind),0 },
530	{ "ljmp",  TRUE, LONG, op1(Eind),0 },
531	{ "push",  TRUE, LONG, op1(E),   0 },
532	{ "",      TRUE, NONE, 0,	 0 }
533};
534
535static const struct inst db_inst_table[256] = {
536/*00*/	{ "add",   TRUE,  BYTE,  op2(R, E),  0 },
537/*01*/	{ "add",   TRUE,  LONG,  op2(R, E),  0 },
538/*02*/	{ "add",   TRUE,  BYTE,  op2(E, R),  0 },
539/*03*/	{ "add",   TRUE,  LONG,  op2(E, R),  0 },
540/*04*/	{ "add",   FALSE, BYTE,  op2(I, A),  0 },
541/*05*/	{ "add",   FALSE, LONG,  op2(Is, A), 0 },
542/*06*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
543/*07*/	{ "pop",   FALSE, NONE,  op1(Si),    0 },
544
545/*08*/	{ "or",    TRUE,  BYTE,  op2(R, E),  0 },
546/*09*/	{ "or",    TRUE,  LONG,  op2(R, E),  0 },
547/*0a*/	{ "or",    TRUE,  BYTE,  op2(E, R),  0 },
548/*0b*/	{ "or",    TRUE,  LONG,  op2(E, R),  0 },
549/*0c*/	{ "or",    FALSE, BYTE,  op2(I, A),  0 },
550/*0d*/	{ "or",    FALSE, LONG,  op2(I, A),  0 },
551/*0e*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
552/*0f*/	{ "",      FALSE, NONE,  0,	     0 },
553
554/*10*/	{ "adc",   TRUE,  BYTE,  op2(R, E),  0 },
555/*11*/	{ "adc",   TRUE,  LONG,  op2(R, E),  0 },
556/*12*/	{ "adc",   TRUE,  BYTE,  op2(E, R),  0 },
557/*13*/	{ "adc",   TRUE,  LONG,  op2(E, R),  0 },
558/*14*/	{ "adc",   FALSE, BYTE,  op2(I, A),  0 },
559/*15*/	{ "adc",   FALSE, LONG,  op2(Is, A), 0 },
560/*16*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
561/*17*/	{ "pop",   FALSE, NONE,  op1(Si),    0 },
562
563/*18*/	{ "sbb",   TRUE,  BYTE,  op2(R, E),  0 },
564/*19*/	{ "sbb",   TRUE,  LONG,  op2(R, E),  0 },
565/*1a*/	{ "sbb",   TRUE,  BYTE,  op2(E, R),  0 },
566/*1b*/	{ "sbb",   TRUE,  LONG,  op2(E, R),  0 },
567/*1c*/	{ "sbb",   FALSE, BYTE,  op2(I, A),  0 },
568/*1d*/	{ "sbb",   FALSE, LONG,  op2(Is, A), 0 },
569/*1e*/	{ "push",  FALSE, NONE,  op1(Si),    0 },
570/*1f*/	{ "pop",   FALSE, NONE,  op1(Si),    0 },
571
572/*20*/	{ "and",   TRUE,  BYTE,  op2(R, E),  0 },
573/*21*/	{ "and",   TRUE,  LONG,  op2(R, E),  0 },
574/*22*/	{ "and",   TRUE,  BYTE,  op2(E, R),  0 },
575/*23*/	{ "and",   TRUE,  LONG,  op2(E, R),  0 },
576/*24*/	{ "and",   FALSE, BYTE,  op2(I, A),  0 },
577/*25*/	{ "and",   FALSE, LONG,  op2(I, A),  0 },
578/*26*/	{ "",      FALSE, NONE,  0,	     0 },
579/*27*/	{ "daa",   FALSE, NONE,  0,	     0 },
580
581/*28*/	{ "sub",   TRUE,  BYTE,  op2(R, E),  0 },
582/*29*/	{ "sub",   TRUE,  LONG,  op2(R, E),  0 },
583/*2a*/	{ "sub",   TRUE,  BYTE,  op2(E, R),  0 },
584/*2b*/	{ "sub",   TRUE,  LONG,  op2(E, R),  0 },
585/*2c*/	{ "sub",   FALSE, BYTE,  op2(I, A),  0 },
586/*2d*/	{ "sub",   FALSE, LONG,  op2(Is, A), 0 },
587/*2e*/	{ "",      FALSE, NONE,  0,	     0 },
588/*2f*/	{ "das",   FALSE, NONE,  0,	     0 },
589
590/*30*/	{ "xor",   TRUE,  BYTE,  op2(R, E),  0 },
591/*31*/	{ "xor",   TRUE,  LONG,  op2(R, E),  0 },
592/*32*/	{ "xor",   TRUE,  BYTE,  op2(E, R),  0 },
593/*33*/	{ "xor",   TRUE,  LONG,  op2(E, R),  0 },
594/*34*/	{ "xor",   FALSE, BYTE,  op2(I, A),  0 },
595/*35*/	{ "xor",   FALSE, LONG,  op2(I, A),  0 },
596/*36*/	{ "",      FALSE, NONE,  0,	     0 },
597/*37*/	{ "aaa",   FALSE, NONE,  0,	     0 },
598
599/*38*/	{ "cmp",   TRUE,  BYTE,  op2(R, E),  0 },
600/*39*/	{ "cmp",   TRUE,  LONG,  op2(R, E),  0 },
601/*3a*/	{ "cmp",   TRUE,  BYTE,  op2(E, R),  0 },
602/*3b*/	{ "cmp",   TRUE,  LONG,  op2(E, R),  0 },
603/*3c*/	{ "cmp",   FALSE, BYTE,  op2(I, A),  0 },
604/*3d*/	{ "cmp",   FALSE, LONG,  op2(Is, A), 0 },
605/*3e*/	{ "",      FALSE, NONE,  0,	     0 },
606/*3f*/	{ "aas",   FALSE, NONE,  0,	     0 },
607
608/*40*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
609/*41*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
610/*42*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
611/*43*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
612/*44*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
613/*45*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
614/*46*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
615/*47*/	{ "inc",   FALSE, LONG,  op1(Ri),    0 },
616
617/*48*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
618/*49*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
619/*4a*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
620/*4b*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
621/*4c*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
622/*4d*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
623/*4e*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
624/*4f*/	{ "dec",   FALSE, LONG,  op1(Ri),    0 },
625
626/*50*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
627/*51*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
628/*52*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
629/*53*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
630/*54*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
631/*55*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
632/*56*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
633/*57*/	{ "push",  FALSE, LONG,  op1(Ri),    0 },
634
635/*58*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
636/*59*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
637/*5a*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
638/*5b*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
639/*5c*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
640/*5d*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
641/*5e*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
642/*5f*/	{ "pop",   FALSE, LONG,  op1(Ri),    0 },
643
644/*60*/	{ "pusha", FALSE, LONG,  0,	     0 },
645/*61*/	{ "popa",  FALSE, LONG,  0,	     0 },
646/*62*/  { "bound", TRUE,  LONG,  op2(E, R),  0 },
647/*63*/	{ "arpl",  TRUE,  NONE,  op2(Rw,Ew), 0 },
648
649/*64*/	{ "",      FALSE, NONE,  0,	     0 },
650/*65*/	{ "",      FALSE, NONE,  0,	     0 },
651/*66*/	{ "",      FALSE, NONE,  0,	     0 },
652/*67*/	{ "",      FALSE, NONE,  0,	     0 },
653
654/*68*/	{ "push",  FALSE, LONG,  op1(I),     0 },
655/*69*/  { "imul",  TRUE,  LONG,  op3(I,E,R), 0 },
656/*6a*/	{ "push",  FALSE, LONG,  op1(Ibs),   0 },
657/*6b*/  { "imul",  TRUE,  LONG,  op3(Ibs,E,R),0 },
658/*6c*/	{ "ins",   FALSE, BYTE,  op2(DX, DI), 0 },
659/*6d*/	{ "ins",   FALSE, LONG,  op2(DX, DI), 0 },
660/*6e*/	{ "outs",  FALSE, BYTE,  op2(SI, DX), 0 },
661/*6f*/	{ "outs",  FALSE, LONG,  op2(SI, DX), 0 },
662
663/*70*/	{ "jo",    FALSE, NONE,  op1(Db),     0 },
664/*71*/	{ "jno",   FALSE, NONE,  op1(Db),     0 },
665/*72*/	{ "jb",    FALSE, NONE,  op1(Db),     0 },
666/*73*/	{ "jnb",   FALSE, NONE,  op1(Db),     0 },
667/*74*/	{ "jz",    FALSE, NONE,  op1(Db),     0 },
668/*75*/	{ "jnz",   FALSE, NONE,  op1(Db),     0 },
669/*76*/	{ "jbe",   FALSE, NONE,  op1(Db),     0 },
670/*77*/	{ "jnbe",  FALSE, NONE,  op1(Db),     0 },
671
672/*78*/	{ "js",    FALSE, NONE,  op1(Db),     0 },
673/*79*/	{ "jns",   FALSE, NONE,  op1(Db),     0 },
674/*7a*/	{ "jp",    FALSE, NONE,  op1(Db),     0 },
675/*7b*/	{ "jnp",   FALSE, NONE,  op1(Db),     0 },
676/*7c*/	{ "jl",    FALSE, NONE,  op1(Db),     0 },
677/*7d*/	{ "jnl",   FALSE, NONE,  op1(Db),     0 },
678/*7e*/	{ "jle",   FALSE, NONE,  op1(Db),     0 },
679/*7f*/	{ "jnle",  FALSE, NONE,  op1(Db),     0 },
680
681/*80*/  { "",	   TRUE,  BYTE,  op2(I, E),   db_Grp1 },
682/*81*/  { "",	   TRUE,  LONG,  op2(I, E),   db_Grp1 },
683/*82*/  { "",	   TRUE,  BYTE,  op2(I, E),   db_Grp1 },
684/*83*/  { "",	   TRUE,  LONG,  op2(Ibs,E),  db_Grp1 },
685/*84*/	{ "test",  TRUE,  BYTE,  op2(R, E),   0 },
686/*85*/	{ "test",  TRUE,  LONG,  op2(R, E),   0 },
687/*86*/	{ "xchg",  TRUE,  BYTE,  op2(R, E),   0 },
688/*87*/	{ "xchg",  TRUE,  LONG,  op2(R, E),   0 },
689
690/*88*/	{ "mov",   TRUE,  BYTE,  op2(R, E),   0 },
691/*89*/	{ "mov",   TRUE,  LONG,  op2(R, E),   0 },
692/*8a*/	{ "mov",   TRUE,  BYTE,  op2(E, R),   0 },
693/*8b*/	{ "mov",   TRUE,  LONG,  op2(E, R),   0 },
694/*8c*/  { "mov",   TRUE,  NONE,  op2(S, Ew),  0 },
695/*8d*/	{ "lea",   TRUE,  LONG,  op2(E, R),   0 },
696/*8e*/	{ "mov",   TRUE,  NONE,  op2(Ew, S),  0 },
697/*8f*/	{ "pop",   TRUE,  LONG,  op1(E),      0 },
698
699/*90*/	{ "nop",   FALSE, NONE,  0,	      0 },
700/*91*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
701/*92*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
702/*93*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
703/*94*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
704/*95*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
705/*96*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
706/*97*/	{ "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
707
708/*98*/	{ "cbw",   FALSE, SDEP,  0,	      "cwde" },	/* cbw/cwde */
709/*99*/	{ "cwd",   FALSE, SDEP,  0,	      "cdq"  },	/* cwd/cdq */
710/*9a*/	{ "lcall", FALSE, NONE,  op1(OS),     0 },
711/*9b*/	{ "wait",  FALSE, NONE,  0,	      0 },
712/*9c*/	{ "pushf", FALSE, LONG,  0,	      0 },
713/*9d*/	{ "popf",  FALSE, LONG,  0,	      0 },
714/*9e*/	{ "sahf",  FALSE, NONE,  0,	      0 },
715/*9f*/	{ "lahf",  FALSE, NONE,  0,	      0 },
716
717/*a0*/	{ "mov",   FALSE, BYTE,  op2(O, A),   0 },
718/*a1*/	{ "mov",   FALSE, LONG,  op2(O, A),   0 },
719/*a2*/	{ "mov",   FALSE, BYTE,  op2(A, O),   0 },
720/*a3*/	{ "mov",   FALSE, LONG,  op2(A, O),   0 },
721/*a4*/	{ "movs",  FALSE, BYTE,  op2(SI,DI),  0 },
722/*a5*/	{ "movs",  FALSE, LONG,  op2(SI,DI),  0 },
723/*a6*/	{ "cmps",  FALSE, BYTE,  op2(SI,DI),  0 },
724/*a7*/	{ "cmps",  FALSE, LONG,  op2(SI,DI),  0 },
725
726/*a8*/	{ "test",  FALSE, BYTE,  op2(I, A),   0 },
727/*a9*/	{ "test",  FALSE, LONG,  op2(I, A),   0 },
728/*aa*/	{ "stos",  FALSE, BYTE,  op1(DI),     0 },
729/*ab*/	{ "stos",  FALSE, LONG,  op1(DI),     0 },
730/*ac*/	{ "lods",  FALSE, BYTE,  op1(SI),     0 },
731/*ad*/	{ "lods",  FALSE, LONG,  op1(SI),     0 },
732/*ae*/	{ "scas",  FALSE, BYTE,  op1(SI),     0 },
733/*af*/	{ "scas",  FALSE, LONG,  op1(SI),     0 },
734
735/*b0*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
736/*b1*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
737/*b2*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
738/*b3*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
739/*b4*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
740/*b5*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
741/*b6*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
742/*b7*/	{ "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
743
744/*b8*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
745/*b9*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
746/*ba*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
747/*bb*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
748/*bc*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
749/*bd*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
750/*be*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
751/*bf*/	{ "mov",   FALSE, LONG,  op2(I, Ri),  0 },
752
753/*c0*/	{ "",	   TRUE,  BYTE,  op2(Ib, E),  db_Grp2 },
754/*c1*/	{ "",	   TRUE,  LONG,  op2(Ib, E),  db_Grp2 },
755/*c2*/	{ "ret",   FALSE, NONE,  op1(Iw),     0 },
756/*c3*/	{ "ret",   FALSE, NONE,  0,	      0 },
757/*c4*/	{ "les",   TRUE,  LONG,  op2(E, R),   0 },
758/*c5*/	{ "lds",   TRUE,  LONG,  op2(E, R),   0 },
759/*c6*/	{ "mov",   TRUE,  BYTE,  op2(I, E),   0 },
760/*c7*/	{ "mov",   TRUE,  LONG,  op2(I, E),   0 },
761
762/*c8*/	{ "enter", FALSE, NONE,  op2(Iw, Ib), 0 },
763/*c9*/	{ "leave", FALSE, NONE,  0,           0 },
764/*ca*/	{ "lret",  FALSE, NONE,  op1(Iw),     0 },
765/*cb*/	{ "lret",  FALSE, NONE,  0,	      0 },
766/*cc*/	{ "int",   FALSE, NONE,  op1(o3),     0 },
767/*cd*/	{ "int",   FALSE, NONE,  op1(Ib),     0 },
768/*ce*/	{ "into",  FALSE, NONE,  0,	      0 },
769/*cf*/	{ "iret",  FALSE, NONE,  0,	      0 },
770
771/*d0*/	{ "",	   TRUE,  BYTE,  op2(o1, E),  db_Grp2 },
772/*d1*/	{ "",	   TRUE,  LONG,  op2(o1, E),  db_Grp2 },
773/*d2*/	{ "",	   TRUE,  BYTE,  op2(CL, E),  db_Grp2 },
774/*d3*/	{ "",	   TRUE,  LONG,  op2(CL, E),  db_Grp2 },
775/*d4*/	{ "aam",   FALSE, NONE,  op1(Iba),    0 },
776/*d5*/	{ "aad",   FALSE, NONE,  op1(Iba),    0 },
777/*d6*/	{ ".byte\t0xd6", FALSE, NONE, 0,      0 },
778/*d7*/	{ "xlat",  FALSE, BYTE,  op1(BX),     0 },
779
780/*d8*/  { "",      TRUE,  NONE,  0,	      db_Esc8 },
781/*d9*/  { "",      TRUE,  NONE,  0,	      db_Esc9 },
782/*da*/  { "",      TRUE,  NONE,  0,	      db_Esca },
783/*db*/  { "",      TRUE,  NONE,  0,	      db_Escb },
784/*dc*/  { "",      TRUE,  NONE,  0,	      db_Escc },
785/*dd*/  { "",      TRUE,  NONE,  0,	      db_Escd },
786/*de*/  { "",      TRUE,  NONE,  0,	      db_Esce },
787/*df*/  { "",      TRUE,  NONE,  0,	      db_Escf },
788
789/*e0*/	{ "loopne",FALSE, NONE,  op1(Db),     0 },
790/*e1*/	{ "loope", FALSE, NONE,  op1(Db),     0 },
791/*e2*/	{ "loop",  FALSE, NONE,  op1(Db),     0 },
792/*e3*/	{ "jcxz",  FALSE, SDEP,  op1(Db),     "jecxz" },
793/*e4*/	{ "in",    FALSE, BYTE,  op2(Ib, A),  0 },
794/*e5*/	{ "in",    FALSE, LONG,  op2(Ib, A) , 0 },
795/*e6*/	{ "out",   FALSE, BYTE,  op2(A, Ib),  0 },
796/*e7*/	{ "out",   FALSE, LONG,  op2(A, Ib) , 0 },
797
798/*e8*/	{ "call",  FALSE, NONE,  op1(Dl),     0 },
799/*e9*/	{ "jmp",   FALSE, NONE,  op1(Dl),     0 },
800/*ea*/	{ "ljmp",  FALSE, NONE,  op1(OS),     0 },
801/*eb*/	{ "jmp",   FALSE, NONE,  op1(Db),     0 },
802/*ec*/	{ "in",    FALSE, BYTE,  op2(DX, A),  0 },
803/*ed*/	{ "in",    FALSE, LONG,  op2(DX, A) , 0 },
804/*ee*/	{ "out",   FALSE, BYTE,  op2(A, DX),  0 },
805/*ef*/	{ "out",   FALSE, LONG,  op2(A, DX) , 0 },
806
807/*f0*/	{ "",      FALSE, NONE,  0,	     0 },
808/*f1*/	{ ".byte\t0xf1", FALSE, NONE, 0,     0 },
809/*f2*/	{ "",      FALSE, NONE,  0,	     0 },
810/*f3*/	{ "",      FALSE, NONE,  0,	     0 },
811/*f4*/	{ "hlt",   FALSE, NONE,  0,	     0 },
812/*f5*/	{ "cmc",   FALSE, NONE,  0,	     0 },
813/*f6*/	{ "",      TRUE,  BYTE,  0,	     db_Grp3 },
814/*f7*/	{ "",	   TRUE,  LONG,  0,	     db_Grp3 },
815
816/*f8*/	{ "clc",   FALSE, NONE,  0,	     0 },
817/*f9*/	{ "stc",   FALSE, NONE,  0,	     0 },
818/*fa*/	{ "cli",   FALSE, NONE,  0,	     0 },
819/*fb*/	{ "sti",   FALSE, NONE,  0,	     0 },
820/*fc*/	{ "cld",   FALSE, NONE,  0,	     0 },
821/*fd*/	{ "std",   FALSE, NONE,  0,	     0 },
822/*fe*/	{ "",	   TRUE,  NONE,  0,	     db_Grp4 },
823/*ff*/	{ "",	   TRUE,  NONE,  0,	     db_Grp5 },
824};
825
826static const struct inst db_bad_inst =
827	{ "???",   FALSE, NONE,  0,	      0 }
828;
829
830#define	f_mod(byte)	((byte)>>6)
831#define	f_reg(byte)	(((byte)>>3)&0x7)
832#define	f_rm(byte)	((byte)&0x7)
833
834#define	sib_ss(byte)	((byte)>>6)
835#define	sib_index(byte)	(((byte)>>3)&0x7)
836#define	sib_base(byte)	((byte)&0x7)
837
838struct i_addr {
839	int		is_reg;	/* if reg, reg number is in 'disp' */
840	int		disp;
841	const char *	base;
842	const char *	index;
843	int		ss;
844};
845
846static const char * const db_index_reg_16[8] = {
847	"%bx,%si",
848	"%bx,%di",
849	"%bp,%si",
850	"%bp,%di",
851	"%si",
852	"%di",
853	"%bp",
854	"%bx"
855};
856
857static const char * const db_reg[3][8] = {
858	{ "%al",  "%cl",  "%dl",  "%bl",  "%ah",  "%ch",  "%dh",  "%bh" },
859	{ "%ax",  "%cx",  "%dx",  "%bx",  "%sp",  "%bp",  "%si",  "%di" },
860	{ "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
861};
862
863static const char * const db_seg_reg[8] = {
864	"%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
865};
866
867/*
868 * lengths for size attributes
869 */
870static const int db_lengths[] = {
871	1,	/* BYTE */
872	2,	/* WORD */
873	4,	/* LONG */
874	8,	/* QUAD */
875	4,	/* SNGL */
876	8,	/* DBLR */
877	10,	/* EXTR */
878};
879
880#define	get_value_inc(result, loc, size, is_signed) \
881	result = db_get_value((loc), (size), (is_signed)); \
882	(loc) += (size);
883
884static db_addr_t
885		db_disasm_esc(db_addr_t loc, int inst, int short_addr,
886		    int size, const char *seg);
887static void	db_print_address(const char *seg, int size,
888		    struct i_addr *addrp);
889static db_addr_t
890		db_read_address(db_addr_t loc, int short_addr, int regmodrm,
891		    struct i_addr *addrp);
892
893/*
894 * Read address at location and return updated location.
895 */
896static db_addr_t
897db_read_address(loc, short_addr, regmodrm, addrp)
898	db_addr_t	loc;
899	int		short_addr;
900	int		regmodrm;
901	struct i_addr *	addrp;		/* out */
902{
903	int		mod, rm, sib, index, disp;
904
905	mod = f_mod(regmodrm);
906	rm  = f_rm(regmodrm);
907
908	if (mod == 3) {
909	    addrp->is_reg = TRUE;
910	    addrp->disp = rm;
911	    return (loc);
912	}
913	addrp->is_reg = FALSE;
914	addrp->index = 0;
915
916	if (short_addr) {
917	    addrp->index = 0;
918	    addrp->ss = 0;
919	    switch (mod) {
920		case 0:
921		    if (rm == 6) {
922			get_value_inc(disp, loc, 2, FALSE);
923			addrp->disp = disp;
924			addrp->base = 0;
925		    }
926		    else {
927			addrp->disp = 0;
928			addrp->base = db_index_reg_16[rm];
929		    }
930		    break;
931		case 1:
932		    get_value_inc(disp, loc, 1, TRUE);
933		    disp &= 0xFFFF;
934		    addrp->disp = disp;
935		    addrp->base = db_index_reg_16[rm];
936		    break;
937		case 2:
938		    get_value_inc(disp, loc, 2, FALSE);
939		    addrp->disp = disp;
940		    addrp->base = db_index_reg_16[rm];
941		    break;
942	    }
943	}
944	else {
945	    if (mod != 3 && rm == 4) {
946		get_value_inc(sib, loc, 1, FALSE);
947		rm = sib_base(sib);
948		index = sib_index(sib);
949		if (index != 4)
950		    addrp->index = db_reg[LONG][index];
951		addrp->ss = sib_ss(sib);
952	    }
953
954	    switch (mod) {
955		case 0:
956		    if (rm == 5) {
957			get_value_inc(addrp->disp, loc, 4, FALSE);
958			addrp->base = 0;
959		    }
960		    else {
961			addrp->disp = 0;
962			addrp->base = db_reg[LONG][rm];
963		    }
964		    break;
965
966		case 1:
967		    get_value_inc(disp, loc, 1, TRUE);
968		    addrp->disp = disp;
969		    addrp->base = db_reg[LONG][rm];
970		    break;
971
972		case 2:
973		    get_value_inc(disp, loc, 4, FALSE);
974		    addrp->disp = disp;
975		    addrp->base = db_reg[LONG][rm];
976		    break;
977	    }
978	}
979	return (loc);
980}
981
982static void
983db_print_address(seg, size, addrp)
984	const char *	seg;
985	int		size;
986	struct i_addr *	addrp;
987{
988	if (addrp->is_reg) {
989	    db_printf("%s", db_reg[size][addrp->disp]);
990	    return;
991	}
992
993	if (seg) {
994	    db_printf("%s:", seg);
995	}
996
997	db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
998	if (addrp->base != 0 || addrp->index != 0) {
999	    db_printf("(");
1000	    if (addrp->base)
1001		db_printf("%s", addrp->base);
1002	    if (addrp->index)
1003		db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
1004	    db_printf(")");
1005	}
1006}
1007
1008/*
1009 * Disassemble floating-point ("escape") instruction
1010 * and return updated location.
1011 */
1012static db_addr_t
1013db_disasm_esc(loc, inst, short_addr, size, seg)
1014	db_addr_t	loc;
1015	int		inst;
1016	int		short_addr;
1017	int		size;
1018	const char *	seg;
1019{
1020	int		regmodrm;
1021	const struct finst *	fp;
1022	int		mod;
1023	struct i_addr	address;
1024	const char *	name;
1025
1026	get_value_inc(regmodrm, loc, 1, FALSE);
1027	fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1028	mod = f_mod(regmodrm);
1029	if (mod != 3) {
1030	    if (*fp->f_name == '\0') {
1031		db_printf("<bad instruction>");
1032		return (loc);
1033	    }
1034	    /*
1035	     * Normal address modes.
1036	     */
1037	    loc = db_read_address(loc, short_addr, regmodrm, &address);
1038	    db_printf("%s", fp->f_name);
1039	    switch(fp->f_size) {
1040		case SNGL:
1041		    db_printf("s");
1042		    break;
1043		case DBLR:
1044		    db_printf("l");
1045		    break;
1046		case EXTR:
1047		    db_printf("t");
1048		    break;
1049		case WORD:
1050		    db_printf("s");
1051		    break;
1052		case LONG:
1053		    db_printf("l");
1054		    break;
1055		case QUAD:
1056		    db_printf("q");
1057		    break;
1058		default:
1059		    break;
1060	    }
1061	    db_printf("\t");
1062	    db_print_address(seg, BYTE, &address);
1063	}
1064	else {
1065	    /*
1066	     * 'reg-reg' - special formats
1067	     */
1068	    switch (fp->f_rrmode) {
1069		case op2(ST,STI):
1070		    name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1071		    db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1072		    break;
1073		case op2(STI,ST):
1074		    name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1075		    db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1076		    break;
1077		case op1(STI):
1078		    name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1079		    db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
1080		    break;
1081		case op1(X):
1082		    name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1083		    if (*name == '\0')
1084			goto bad;
1085		    db_printf("%s", name);
1086		    break;
1087		case op1(XA):
1088		    name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1089		    if (*name == '\0')
1090			goto bad;
1091		    db_printf("%s\t%%ax", name);
1092		    break;
1093		default:
1094		bad:
1095		    db_printf("<bad instruction>");
1096		    break;
1097	    }
1098	}
1099
1100	return (loc);
1101}
1102
1103/*
1104 * Disassemble instruction at 'loc'.  'altfmt' specifies an
1105 * (optional) alternate format.  Return address of start of
1106 * next instruction.
1107 */
1108db_addr_t
1109db_disasm(loc, altfmt)
1110	db_addr_t	loc;
1111	boolean_t	altfmt;
1112{
1113	int	inst;
1114	int	size;
1115	int	short_addr;
1116	const char *	seg;
1117	const struct inst *	ip;
1118	const char *	i_name;
1119	int	i_size;
1120	int	i_mode;
1121	int	regmodrm = 0;
1122	boolean_t	first;
1123	int	displ;
1124	int	prefix;
1125	int	imm;
1126	int	imm2;
1127	int	len;
1128	struct i_addr	address;
1129
1130	get_value_inc(inst, loc, 1, FALSE);
1131	short_addr = FALSE;
1132	size = LONG;
1133	seg = 0;
1134
1135	/*
1136	 * Get prefixes
1137	 */
1138	prefix = TRUE;
1139	do {
1140	    switch (inst) {
1141		case 0x66:		/* data16 */
1142		    size = WORD;
1143		    break;
1144		case 0x67:
1145		    short_addr = TRUE;
1146		    break;
1147		case 0x26:
1148		    seg = "%es";
1149		    break;
1150		case 0x36:
1151		    seg = "%ss";
1152		    break;
1153		case 0x2e:
1154		    seg = "%cs";
1155		    break;
1156		case 0x3e:
1157		    seg = "%ds";
1158		    break;
1159		case 0x64:
1160		    seg = "%fs";
1161		    break;
1162		case 0x65:
1163		    seg = "%gs";
1164		    break;
1165		case 0xf0:
1166		    db_printf("lock ");
1167		    break;
1168		case 0xf2:
1169		    db_printf("repne ");
1170		    break;
1171		case 0xf3:
1172		    db_printf("repe ");	/* XXX repe VS rep */
1173		    break;
1174		default:
1175		    prefix = FALSE;
1176		    break;
1177	    }
1178	    if (prefix) {
1179		get_value_inc(inst, loc, 1, FALSE);
1180	    }
1181	} while (prefix);
1182
1183	if (inst >= 0xd8 && inst <= 0xdf) {
1184	    loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1185	    db_printf("\n");
1186	    return (loc);
1187	}
1188
1189	if (inst == 0x0f) {
1190	    get_value_inc(inst, loc, 1, FALSE);
1191	    ip = db_inst_0f[inst>>4];
1192	    if (ip == 0) {
1193		ip = &db_bad_inst;
1194	    }
1195	    else {
1196		ip = &ip[inst&0xf];
1197	    }
1198	}
1199	else
1200	    ip = &db_inst_table[inst];
1201
1202	if (ip->i_has_modrm) {
1203	    get_value_inc(regmodrm, loc, 1, FALSE);
1204	    loc = db_read_address(loc, short_addr, regmodrm, &address);
1205	}
1206
1207	i_name = ip->i_name;
1208	i_size = ip->i_size;
1209	i_mode = ip->i_mode;
1210
1211	if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1212	    ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1213	    ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) {
1214	    i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1215	}
1216	else if (ip->i_extra == db_Grp3) {
1217	    ip = ip->i_extra;
1218	    ip = &ip[f_reg(regmodrm)];
1219	    i_name = ip->i_name;
1220	    i_mode = ip->i_mode;
1221	}
1222	else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1223	    ip = ip->i_extra;
1224	    ip = &ip[f_reg(regmodrm)];
1225	    i_name = ip->i_name;
1226	    i_mode = ip->i_mode;
1227	    i_size = ip->i_size;
1228	}
1229
1230	if (i_size == SDEP) {
1231	    if (size == WORD)
1232		db_printf("%s", i_name);
1233	    else
1234		db_printf("%s", (const char *)ip->i_extra);
1235	}
1236	else {
1237	    db_printf("%s", i_name);
1238	    if (i_size != NONE) {
1239		if (i_size == BYTE) {
1240		    db_printf("b");
1241		    size = BYTE;
1242		}
1243		else if (i_size == WORD) {
1244		    db_printf("w");
1245		    size = WORD;
1246		}
1247		else if (size == WORD)
1248		    db_printf("w");
1249		else
1250		    db_printf("l");
1251	    }
1252	}
1253	db_printf("\t");
1254	for (first = TRUE;
1255	     i_mode != 0;
1256	     i_mode >>= 8, first = FALSE)
1257	{
1258	    if (!first)
1259		db_printf(",");
1260
1261	    switch (i_mode & 0xFF) {
1262
1263		case E:
1264		    db_print_address(seg, size, &address);
1265		    break;
1266
1267		case Eind:
1268		    db_printf("*");
1269		    db_print_address(seg, size, &address);
1270		    break;
1271
1272		case El:
1273		    db_print_address(seg, LONG, &address);
1274		    break;
1275
1276		case Ew:
1277		    db_print_address(seg, WORD, &address);
1278		    break;
1279
1280		case Eb:
1281		    db_print_address(seg, BYTE, &address);
1282		    break;
1283
1284		case R:
1285		    db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1286		    break;
1287
1288		case Rw:
1289		    db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1290		    break;
1291
1292		case Ri:
1293		    db_printf("%s", db_reg[size][f_rm(inst)]);
1294		    break;
1295
1296		case Ril:
1297		    db_printf("%s", db_reg[LONG][f_rm(inst)]);
1298		    break;
1299
1300		case S:
1301		    db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1302		    break;
1303
1304		case Si:
1305		    db_printf("%s", db_seg_reg[f_reg(inst)]);
1306		    break;
1307
1308		case A:
1309		    db_printf("%s", db_reg[size][0]);	/* acc */
1310		    break;
1311
1312		case BX:
1313		    if (seg)
1314			db_printf("%s:", seg);
1315		    db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1316		    break;
1317
1318		case CL:
1319		    db_printf("%%cl");
1320		    break;
1321
1322		case DX:
1323		    db_printf("%%dx");
1324		    break;
1325
1326		case SI:
1327		    if (seg)
1328			db_printf("%s:", seg);
1329		    db_printf("(%s)", short_addr ? "%si" : "%esi");
1330		    break;
1331
1332		case DI:
1333		    db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
1334		    break;
1335
1336		case CR:
1337		    db_printf("%%cr%d", f_reg(regmodrm));
1338		    break;
1339
1340		case DR:
1341		    db_printf("%%dr%d", f_reg(regmodrm));
1342		    break;
1343
1344		case TR:
1345		    db_printf("%%tr%d", f_reg(regmodrm));
1346		    break;
1347
1348		case I:
1349		    len = db_lengths[size];
1350		    get_value_inc(imm, loc, len, FALSE);
1351		    db_printf("$%#r", imm);
1352		    break;
1353
1354		case Is:
1355		    len = db_lengths[size];
1356		    get_value_inc(imm, loc, len, FALSE);
1357		    db_printf("$%+#r", imm);
1358		    break;
1359
1360		case Ib:
1361		    get_value_inc(imm, loc, 1, FALSE);
1362		    db_printf("$%#r", imm);
1363		    break;
1364
1365		case Iba:
1366		    get_value_inc(imm, loc, 1, FALSE);
1367		    if (imm != 0x0a)
1368			db_printf("$%#r", imm);
1369		    break;
1370
1371		case Ibs:
1372		    get_value_inc(imm, loc, 1, TRUE);
1373		    if (size == WORD)
1374			imm &= 0xFFFF;
1375		    db_printf("$%+#r", imm);
1376		    break;
1377
1378		case Iw:
1379		    get_value_inc(imm, loc, 2, FALSE);
1380		    db_printf("$%#r", imm);
1381		    break;
1382
1383		case O:
1384		    len = (short_addr ? 2 : 4);
1385		    get_value_inc(displ, loc, len, FALSE);
1386		    if (seg)
1387			db_printf("%s:%+#r",seg, displ);
1388		    else
1389			db_printsym((db_addr_t)displ, DB_STGY_ANY);
1390		    break;
1391
1392		case Db:
1393		    get_value_inc(displ, loc, 1, TRUE);
1394		    displ += loc;
1395		    if (size == WORD)
1396			displ &= 0xFFFF;
1397		    db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1398		    break;
1399
1400		case Dl:
1401		    len = db_lengths[size];
1402		    get_value_inc(displ, loc, len, FALSE);
1403		    displ += loc;
1404		    if (size == WORD)
1405			displ &= 0xFFFF;
1406		    db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1407		    break;
1408
1409		case o1:
1410		    db_printf("$1");
1411		    break;
1412
1413		case o3:
1414		    db_printf("$3");
1415		    break;
1416
1417		case OS:
1418		    len = db_lengths[size];
1419		    get_value_inc(imm, loc, len, FALSE);	/* offset */
1420		    get_value_inc(imm2, loc, 2, FALSE);	/* segment */
1421		    db_printf("$%#r,%#r", imm2, imm);
1422		    break;
1423	    }
1424	}
1425	db_printf("\n");
1426	return (loc);
1427}
1428