kernel tree reorganization stage 1: Major cvs repository work (not logged as
[dragonfly.git] / sys / i386 / i386 / db_disasm.c
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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 * $FreeBSD: src/sys/i386/i386/db_disasm.c,v 1.23.2.1 2001/07/29 22:48:37 kris Exp $
1de703da 27 * $DragonFly: src/sys/i386/i386/Attic/db_disasm.c,v 1.2 2003/06/17 04:28:35 dillon Exp $
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28 */
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_0f8x[] = {
217/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
218/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
219/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
220/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
221/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
222/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
223/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
224/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
225
226/*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
227/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
228/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
229/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
230/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
231/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
232/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
233/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
234};
235
236static const struct inst db_inst_0f9x[] = {
237/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
238/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
239/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
240/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
241/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
242/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
243/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
244/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
245
246/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
247/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
248/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
249/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
250/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
251/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
252/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
253/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
254};
255
256static const struct inst db_inst_0fax[] = {
257/*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
258/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
259/*a2*/ { "cpuid", FALSE, NONE, 0, 0 },
260/*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 },
261/*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 },
262/*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 },
263/*a6*/ { "", FALSE, NONE, 0, 0 },
264/*a7*/ { "", FALSE, NONE, 0, 0 },
265
266/*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
267/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
268/*aa*/ { "rsm", FALSE, NONE, 0, 0 },
269/*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 },
270/*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 },
271/*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 },
272/*a6*/ { "", FALSE, NONE, 0, 0 },
273/*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 },
274};
275
276static const struct inst db_inst_0fbx[] = {
277/*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
278/*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
279/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
280/*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 },
281/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
282/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
283/*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 },
284/*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 },
285
286/*b8*/ { "", FALSE, NONE, 0, 0 },
287/*b9*/ { "", FALSE, NONE, 0, 0 },
288/*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 },
289/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
290/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
291/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
292/*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 },
293/*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 },
294};
295
296static const struct inst db_inst_0fcx[] = {
297/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
298/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
299/*c2*/ { "", FALSE, NONE, 0, 0 },
300/*c3*/ { "", FALSE, NONE, 0, 0 },
301/*c4*/ { "", FALSE, NONE, 0, 0 },
302/*c5*/ { "", FALSE, NONE, 0, 0 },
303/*c6*/ { "", FALSE, NONE, 0, 0 },
304/*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 },
305/*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
306/*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
307/*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
308/*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
309/*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
310/*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
311/*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
312/*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
313};
314
315static const struct inst * const db_inst_0f[] = {
316 db_inst_0f0x,
317 0,
318 db_inst_0f2x,
319 db_inst_0f3x,
320 0,
321 0,
322 0,
323 0,
324 db_inst_0f8x,
325 db_inst_0f9x,
326 db_inst_0fax,
327 db_inst_0fbx,
328 db_inst_0fcx,
329 0,
330 0,
331 0
332};
333
334static const char * const db_Esc92[] = {
335 "fnop", "", "", "", "", "", "", ""
336};
337static const char * const db_Esc94[] = {
338 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
339};
340static const char * const db_Esc95[] = {
341 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
342};
343static const char * const db_Esc96[] = {
344 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
345 "fincstp"
346};
347static const char * const db_Esc97[] = {
348 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
349};
350
351static const char * const db_Esca5[] = {
352 "", "fucompp","", "", "", "", "", ""
353};
354
355static const char * const db_Escb4[] = {
356 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
357};
358
359static const char * const db_Esce3[] = {
360 "", "fcompp","", "", "", "", "", ""
361};
362
363static const char * const db_Escf4[] = {
364 "fnstsw","", "", "", "", "", "", ""
365};
366
367static const struct finst db_Esc8[] = {
368/*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
369/*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
370/*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
371/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
372/*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
373/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
374/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
375/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
376};
377
378static const struct finst db_Esc9[] = {
379/*0*/ { "fld", SNGL, op1(STI), 0 },
380/*1*/ { "", NONE, op1(STI), "fxch" },
381/*2*/ { "fst", SNGL, op1(X), db_Esc92 },
382/*3*/ { "fstp", SNGL, 0, 0 },
383/*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
384/*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
385/*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
386/*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
387};
388
389static const struct finst db_Esca[] = {
390/*0*/ { "fiadd", LONG, 0, 0 },
391/*1*/ { "fimul", LONG, 0, 0 },
392/*2*/ { "ficom", LONG, 0, 0 },
393/*3*/ { "ficomp", LONG, 0, 0 },
394/*4*/ { "fisub", LONG, 0, 0 },
395/*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
396/*6*/ { "fidiv", LONG, 0, 0 },
397/*7*/ { "fidivr", LONG, 0, 0 }
398};
399
400static const struct finst db_Escb[] = {
401/*0*/ { "fild", LONG, 0, 0 },
402/*1*/ { "", NONE, 0, 0 },
403/*2*/ { "fist", LONG, 0, 0 },
404/*3*/ { "fistp", LONG, 0, 0 },
405/*4*/ { "", WORD, op1(X), db_Escb4 },
406/*5*/ { "fld", EXTR, 0, 0 },
407/*6*/ { "", WORD, 0, 0 },
408/*7*/ { "fstp", EXTR, 0, 0 },
409};
410
411static const struct finst db_Escc[] = {
412/*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
413/*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
414/*2*/ { "fcom", DBLR, 0, 0 },
415/*3*/ { "fcomp", DBLR, 0, 0 },
416/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
417/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
418/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
419/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
420};
421
422static const struct finst db_Escd[] = {
423/*0*/ { "fld", DBLR, op1(STI), "ffree" },
424/*1*/ { "", NONE, 0, 0 },
425/*2*/ { "fst", DBLR, op1(STI), 0 },
426/*3*/ { "fstp", DBLR, op1(STI), 0 },
427/*4*/ { "frstor", NONE, op1(STI), "fucom" },
428/*5*/ { "", NONE, op1(STI), "fucomp" },
429/*6*/ { "fnsave", NONE, 0, 0 },
430/*7*/ { "fnstsw", NONE, 0, 0 },
431};
432
433static const struct finst db_Esce[] = {
434/*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" },
435/*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
436/*2*/ { "ficom", WORD, 0, 0 },
437/*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
438/*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
439/*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
440/*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
441/*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
442};
443
444static const struct finst db_Escf[] = {
445/*0*/ { "fild", WORD, 0, 0 },
446/*1*/ { "", NONE, 0, 0 },
447/*2*/ { "fist", WORD, 0, 0 },
448/*3*/ { "fistp", WORD, 0, 0 },
449/*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
450/*5*/ { "fild", QUAD, 0, 0 },
451/*6*/ { "fbstp", NONE, 0, 0 },
452/*7*/ { "fistp", QUAD, 0, 0 },
453};
454
455static const struct finst * const db_Esc_inst[] = {
456 db_Esc8, db_Esc9, db_Esca, db_Escb,
457 db_Escc, db_Escd, db_Esce, db_Escf
458};
459
460static const char * const db_Grp1[] = {
461 "add",
462 "or",
463 "adc",
464 "sbb",
465 "and",
466 "sub",
467 "xor",
468 "cmp"
469};
470
471static const char * const db_Grp2[] = {
472 "rol",
473 "ror",
474 "rcl",
475 "rcr",
476 "shl",
477 "shr",
478 "shl",
479 "sar"
480};
481
482static const struct inst db_Grp3[] = {
483 { "test", TRUE, NONE, op2(I,E), 0 },
484 { "test", TRUE, NONE, op2(I,E), 0 },
485 { "not", TRUE, NONE, op1(E), 0 },
486 { "neg", TRUE, NONE, op1(E), 0 },
487 { "mul", TRUE, NONE, op2(E,A), 0 },
488 { "imul", TRUE, NONE, op2(E,A), 0 },
489 { "div", TRUE, NONE, op2(E,A), 0 },
490 { "idiv", TRUE, NONE, op2(E,A), 0 },
491};
492
493static const struct inst db_Grp4[] = {
494 { "inc", TRUE, BYTE, op1(E), 0 },
495 { "dec", TRUE, BYTE, op1(E), 0 },
496 { "", TRUE, NONE, 0, 0 },
497 { "", TRUE, NONE, 0, 0 },
498 { "", TRUE, NONE, 0, 0 },
499 { "", TRUE, NONE, 0, 0 },
500 { "", TRUE, NONE, 0, 0 },
501 { "", TRUE, NONE, 0, 0 }
502};
503
504static const struct inst db_Grp5[] = {
505 { "inc", TRUE, LONG, op1(E), 0 },
506 { "dec", TRUE, LONG, op1(E), 0 },
507 { "call", TRUE, LONG, op1(Eind),0 },
508 { "lcall", TRUE, LONG, op1(Eind),0 },
509 { "jmp", TRUE, LONG, op1(Eind),0 },
510 { "ljmp", TRUE, LONG, op1(Eind),0 },
511 { "push", TRUE, LONG, op1(E), 0 },
512 { "", TRUE, NONE, 0, 0 }
513};
514
515static const struct inst db_inst_table[256] = {
516/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
517/*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
518/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
519/*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
520/*04*/ { "add", FALSE, BYTE, op2(I, A), 0 },
521/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
522/*06*/ { "push", FALSE, NONE, op1(Si), 0 },
523/*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
524
525/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
526/*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
527/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
528/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
529/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
530/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
531/*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
532/*0f*/ { "", FALSE, NONE, 0, 0 },
533
534/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
535/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
536/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
537/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
538/*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 },
539/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
540/*16*/ { "push", FALSE, NONE, op1(Si), 0 },
541/*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
542
543/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
544/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
545/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
546/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
547/*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 },
548/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
549/*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
550/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
551
552/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
553/*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
554/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
555/*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
556/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
557/*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
558/*26*/ { "", FALSE, NONE, 0, 0 },
559/*27*/ { "daa", FALSE, NONE, 0, 0 },
560
561/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
562/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
563/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
564/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
565/*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 },
566/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
567/*2e*/ { "", FALSE, NONE, 0, 0 },
568/*2f*/ { "das", FALSE, NONE, 0, 0 },
569
570/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
571/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
572/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
573/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
574/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
575/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
576/*36*/ { "", FALSE, NONE, 0, 0 },
577/*37*/ { "aaa", FALSE, NONE, 0, 0 },
578
579/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
580/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
581/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
582/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
583/*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 },
584/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
585/*3e*/ { "", FALSE, NONE, 0, 0 },
586/*3f*/ { "aas", FALSE, NONE, 0, 0 },
587
588/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
589/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
590/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
591/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
592/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
593/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
594/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
595/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
596
597/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
598/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
599/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
600/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
601/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
602/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
603/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
604/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
605
606/*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
607/*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
608/*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
609/*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
610/*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
611/*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
612/*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
613/*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
614
615/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
616/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
617/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
618/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
619/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
620/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
621/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
622/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
623
624/*60*/ { "pusha", FALSE, LONG, 0, 0 },
625/*61*/ { "popa", FALSE, LONG, 0, 0 },
626/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
627/*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 },
628
629/*64*/ { "", FALSE, NONE, 0, 0 },
630/*65*/ { "", FALSE, NONE, 0, 0 },
631/*66*/ { "", FALSE, NONE, 0, 0 },
632/*67*/ { "", FALSE, NONE, 0, 0 },
633
634/*68*/ { "push", FALSE, LONG, op1(I), 0 },
635/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
636/*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 },
637/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
638/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
639/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
640/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
641/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
642
643/*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
644/*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
645/*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
646/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
647/*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
648/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
649/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
650/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
651
652/*78*/ { "js", FALSE, NONE, op1(Db), 0 },
653/*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
654/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
655/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
656/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
657/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
658/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
659/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
660
661/*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
662/*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 },
663/*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
664/*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 },
665/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
666/*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
667/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
668/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
669
670/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
671/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
672/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
673/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
674/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
675/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
676/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
677/*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
678
679/*90*/ { "nop", FALSE, NONE, 0, 0 },
680/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
681/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
682/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
683/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
684/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
685/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
686/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
687
688/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
689/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
690/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
691/*9b*/ { "wait", FALSE, NONE, 0, 0 },
692/*9c*/ { "pushf", FALSE, LONG, 0, 0 },
693/*9d*/ { "popf", FALSE, LONG, 0, 0 },
694/*9e*/ { "sahf", FALSE, NONE, 0, 0 },
695/*9f*/ { "lahf", FALSE, NONE, 0, 0 },
696
697/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
698/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
699/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
700/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
701/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
702/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
703/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
704/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
705
706/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
707/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
708/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
709/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
710/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
711/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
712/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
713/*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
714
715/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
716/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
717/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
718/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
719/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
720/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
721/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
722/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
723
724/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
725/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
726/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
727/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
728/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
729/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
730/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
731/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
732
733/*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 },
734/*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 },
735/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
736/*c3*/ { "ret", FALSE, NONE, 0, 0 },
737/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
738/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
739/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
740/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
741
742/*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 },
743/*c9*/ { "leave", FALSE, NONE, 0, 0 },
744/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
745/*cb*/ { "lret", FALSE, NONE, 0, 0 },
746/*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
747/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
748/*ce*/ { "into", FALSE, NONE, 0, 0 },
749/*cf*/ { "iret", FALSE, NONE, 0, 0 },
750
751/*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 },
752/*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 },
753/*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 },
754/*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 },
755/*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 },
756/*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 },
757/*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 },
758/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
759
760/*d8*/ { "", TRUE, NONE, 0, db_Esc8 },
761/*d9*/ { "", TRUE, NONE, 0, db_Esc9 },
762/*da*/ { "", TRUE, NONE, 0, db_Esca },
763/*db*/ { "", TRUE, NONE, 0, db_Escb },
764/*dc*/ { "", TRUE, NONE, 0, db_Escc },
765/*dd*/ { "", TRUE, NONE, 0, db_Escd },
766/*de*/ { "", TRUE, NONE, 0, db_Esce },
767/*df*/ { "", TRUE, NONE, 0, db_Escf },
768
769/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
770/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
771/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
772/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
773/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
774/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
775/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
776/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
777
778/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
779/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
780/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
781/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
782/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
783/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
784/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
785/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
786
787/*f0*/ { "", FALSE, NONE, 0, 0 },
788/*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 },
789/*f2*/ { "", FALSE, NONE, 0, 0 },
790/*f3*/ { "", FALSE, NONE, 0, 0 },
791/*f4*/ { "hlt", FALSE, NONE, 0, 0 },
792/*f5*/ { "cmc", FALSE, NONE, 0, 0 },
793/*f6*/ { "", TRUE, BYTE, 0, db_Grp3 },
794/*f7*/ { "", TRUE, LONG, 0, db_Grp3 },
795
796/*f8*/ { "clc", FALSE, NONE, 0, 0 },
797/*f9*/ { "stc", FALSE, NONE, 0, 0 },
798/*fa*/ { "cli", FALSE, NONE, 0, 0 },
799/*fb*/ { "sti", FALSE, NONE, 0, 0 },
800/*fc*/ { "cld", FALSE, NONE, 0, 0 },
801/*fd*/ { "std", FALSE, NONE, 0, 0 },
802/*fe*/ { "", TRUE, NONE, 0, db_Grp4 },
803/*ff*/ { "", TRUE, NONE, 0, db_Grp5 },
804};
805
806static const struct inst db_bad_inst =
807 { "???", FALSE, NONE, 0, 0 }
808;
809
810#define f_mod(byte) ((byte)>>6)
811#define f_reg(byte) (((byte)>>3)&0x7)
812#define f_rm(byte) ((byte)&0x7)
813
814#define sib_ss(byte) ((byte)>>6)
815#define sib_index(byte) (((byte)>>3)&0x7)
816#define sib_base(byte) ((byte)&0x7)
817
818struct i_addr {
819 int is_reg; /* if reg, reg number is in 'disp' */
820 int disp;
821 const char * base;
822 const char * index;
823 int ss;
824};
825
826static const char * const db_index_reg_16[8] = {
827 "%bx,%si",
828 "%bx,%di",
829 "%bp,%si",
830 "%bp,%di",
831 "%si",
832 "%di",
833 "%bp",
834 "%bx"
835};
836
837static const char * const db_reg[3][8] = {
838 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" },
839 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" },
840 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
841};
842
843static const char * const db_seg_reg[8] = {
844 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
845};
846
847/*
848 * lengths for size attributes
849 */
850static const int db_lengths[] = {
851 1, /* BYTE */
852 2, /* WORD */
853 4, /* LONG */
854 8, /* QUAD */
855 4, /* SNGL */
856 8, /* DBLR */
857 10, /* EXTR */
858};
859
860#define get_value_inc(result, loc, size, is_signed) \
861 result = db_get_value((loc), (size), (is_signed)); \
862 (loc) += (size);
863
864static db_addr_t
865 db_disasm_esc __P((db_addr_t loc, int inst, int short_addr,
866 int size, const char *seg));
867static void db_print_address __P((const char *seg, int size,
868 struct i_addr *addrp));
869static db_addr_t
870 db_read_address __P((db_addr_t loc, int short_addr,
871 int regmodrm, struct i_addr *addrp));
872
873/*
874 * Read address at location and return updated location.
875 */
876static db_addr_t
877db_read_address(loc, short_addr, regmodrm, addrp)
878 db_addr_t loc;
879 int short_addr;
880 int regmodrm;
881 struct i_addr * addrp; /* out */
882{
883 int mod, rm, sib, index, disp;
884
885 mod = f_mod(regmodrm);
886 rm = f_rm(regmodrm);
887
888 if (mod == 3) {
889 addrp->is_reg = TRUE;
890 addrp->disp = rm;
891 return (loc);
892 }
893 addrp->is_reg = FALSE;
894 addrp->index = 0;
895
896 if (short_addr) {
897 addrp->index = 0;
898 addrp->ss = 0;
899 switch (mod) {
900 case 0:
901 if (rm == 6) {
902 get_value_inc(disp, loc, 2, FALSE);
903 addrp->disp = disp;
904 addrp->base = 0;
905 }
906 else {
907 addrp->disp = 0;
908 addrp->base = db_index_reg_16[rm];
909 }
910 break;
911 case 1:
912 get_value_inc(disp, loc, 1, TRUE);
913 disp &= 0xFFFF;
914 addrp->disp = disp;
915 addrp->base = db_index_reg_16[rm];
916 break;
917 case 2:
918 get_value_inc(disp, loc, 2, FALSE);
919 addrp->disp = disp;
920 addrp->base = db_index_reg_16[rm];
921 break;
922 }
923 }
924 else {
925 if (mod != 3 && rm == 4) {
926 get_value_inc(sib, loc, 1, FALSE);
927 rm = sib_base(sib);
928 index = sib_index(sib);
929 if (index != 4)
930 addrp->index = db_reg[LONG][index];
931 addrp->ss = sib_ss(sib);
932 }
933
934 switch (mod) {
935 case 0:
936 if (rm == 5) {
937 get_value_inc(addrp->disp, loc, 4, FALSE);
938 addrp->base = 0;
939 }
940 else {
941 addrp->disp = 0;
942 addrp->base = db_reg[LONG][rm];
943 }
944 break;
945
946 case 1:
947 get_value_inc(disp, loc, 1, TRUE);
948 addrp->disp = disp;
949 addrp->base = db_reg[LONG][rm];
950 break;
951
952 case 2:
953 get_value_inc(disp, loc, 4, FALSE);
954 addrp->disp = disp;
955 addrp->base = db_reg[LONG][rm];
956 break;
957 }
958 }
959 return (loc);
960}
961
962static void
963db_print_address(seg, size, addrp)
964 const char * seg;
965 int size;
966 struct i_addr * addrp;
967{
968 if (addrp->is_reg) {
969 db_printf("%s", db_reg[size][addrp->disp]);
970 return;
971 }
972
973 if (seg) {
974 db_printf("%s:", seg);
975 }
976
977 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
978 if (addrp->base != 0 || addrp->index != 0) {
979 db_printf("(");
980 if (addrp->base)
981 db_printf("%s", addrp->base);
982 if (addrp->index)
983 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
984 db_printf(")");
985 }
986}
987
988/*
989 * Disassemble floating-point ("escape") instruction
990 * and return updated location.
991 */
992static db_addr_t
993db_disasm_esc(loc, inst, short_addr, size, seg)
994 db_addr_t loc;
995 int inst;
996 int short_addr;
997 int size;
998 const char * seg;
999{
1000 int regmodrm;
1001 const struct finst * fp;
1002 int mod;
1003 struct i_addr address;
1004 const char * name;
1005
1006 get_value_inc(regmodrm, loc, 1, FALSE);
1007 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1008 mod = f_mod(regmodrm);
1009 if (mod != 3) {
1010 if (*fp->f_name == '\0') {
1011 db_printf("<bad instruction>");
1012 return (loc);
1013 }
1014 /*
1015 * Normal address modes.
1016 */
1017 loc = db_read_address(loc, short_addr, regmodrm, &address);
1018 db_printf("%s", fp->f_name);
1019 switch(fp->f_size) {
1020 case SNGL:
1021 db_printf("s");
1022 break;
1023 case DBLR:
1024 db_printf("l");
1025 break;
1026 case EXTR:
1027 db_printf("t");
1028 break;
1029 case WORD:
1030 db_printf("s");
1031 break;
1032 case LONG:
1033 db_printf("l");
1034 break;
1035 case QUAD:
1036 db_printf("q");
1037 break;
1038 default:
1039 break;
1040 }
1041 db_printf("\t");
1042 db_print_address(seg, BYTE, &address);
1043 }
1044 else {
1045 /*
1046 * 'reg-reg' - special formats
1047 */
1048 switch (fp->f_rrmode) {
1049 case op2(ST,STI):
1050 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1051 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1052 break;
1053 case op2(STI,ST):
1054 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1055 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1056 break;
1057 case op1(STI):
1058 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1059 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
1060 break;
1061 case op1(X):
1062 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1063 if (*name == '\0')
1064 goto bad;
1065 db_printf("%s", name);
1066 break;
1067 case op1(XA):
1068 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1069 if (*name == '\0')
1070 goto bad;
1071 db_printf("%s\t%%ax", name);
1072 break;
1073 default:
1074 bad:
1075 db_printf("<bad instruction>");
1076 break;
1077 }
1078 }
1079
1080 return (loc);
1081}
1082
1083/*
1084 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1085 * (optional) alternate format. Return address of start of
1086 * next instruction.
1087 */
1088db_addr_t
1089db_disasm(loc, altfmt)
1090 db_addr_t loc;
1091 boolean_t altfmt;
1092{
1093 int inst;
1094 int size;
1095 int short_addr;
1096 const char * seg;
1097 const struct inst * ip;
1098 const char * i_name;
1099 int i_size;
1100 int i_mode;
1101 int regmodrm = 0;
1102 boolean_t first;
1103 int displ;
1104 int prefix;
1105 int imm;
1106 int imm2;
1107 int len;
1108 struct i_addr address;
1109
1110 get_value_inc(inst, loc, 1, FALSE);
1111 short_addr = FALSE;
1112 size = LONG;
1113 seg = 0;
1114
1115 /*
1116 * Get prefixes
1117 */
1118 prefix = TRUE;
1119 do {
1120 switch (inst) {
1121 case 0x66: /* data16 */
1122 size = WORD;
1123 break;
1124 case 0x67:
1125 short_addr = TRUE;
1126 break;
1127 case 0x26:
1128 seg = "%es";
1129 break;
1130 case 0x36:
1131 seg = "%ss";
1132 break;
1133 case 0x2e:
1134 seg = "%cs";
1135 break;
1136 case 0x3e:
1137 seg = "%ds";
1138 break;
1139 case 0x64:
1140 seg = "%fs";
1141 break;
1142 case 0x65:
1143 seg = "%gs";
1144 break;
1145 case 0xf0:
1146 db_printf("lock ");
1147 break;
1148 case 0xf2:
1149 db_printf("repne ");
1150 break;
1151 case 0xf3:
1152 db_printf("repe "); /* XXX repe VS rep */
1153 break;
1154 default:
1155 prefix = FALSE;
1156 break;
1157 }
1158 if (prefix) {
1159 get_value_inc(inst, loc, 1, FALSE);
1160 }
1161 } while (prefix);
1162
1163 if (inst >= 0xd8 && inst <= 0xdf) {
1164 loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1165 db_printf("\n");
1166 return (loc);
1167 }
1168
1169 if (inst == 0x0f) {
1170 get_value_inc(inst, loc, 1, FALSE);
1171 ip = db_inst_0f[inst>>4];
1172 if (ip == 0) {
1173 ip = &db_bad_inst;
1174 }
1175 else {
1176 ip = &ip[inst&0xf];
1177 }
1178 }
1179 else
1180 ip = &db_inst_table[inst];
1181
1182 if (ip->i_has_modrm) {
1183 get_value_inc(regmodrm, loc, 1, FALSE);
1184 loc = db_read_address(loc, short_addr, regmodrm, &address);
1185 }
1186
1187 i_name = ip->i_name;
1188 i_size = ip->i_size;
1189 i_mode = ip->i_mode;
1190
1191 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1192 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1193 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) {
1194 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1195 }
1196 else if (ip->i_extra == db_Grp3) {
1197 ip = ip->i_extra;
1198 ip = &ip[f_reg(regmodrm)];
1199 i_name = ip->i_name;
1200 i_mode = ip->i_mode;
1201 }
1202 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1203 ip = ip->i_extra;
1204 ip = &ip[f_reg(regmodrm)];
1205 i_name = ip->i_name;
1206 i_mode = ip->i_mode;
1207 i_size = ip->i_size;
1208 }
1209
1210 if (i_size == SDEP) {
1211 if (size == WORD)
1212 db_printf("%s", i_name);
1213 else
1214 db_printf("%s", (const char *)ip->i_extra);
1215 }
1216 else {
1217 db_printf("%s", i_name);
1218 if (i_size != NONE) {
1219 if (i_size == BYTE) {
1220 db_printf("b");
1221 size = BYTE;
1222 }
1223 else if (i_size == WORD) {
1224 db_printf("w");
1225 size = WORD;
1226 }
1227 else if (size == WORD)
1228 db_printf("w");
1229 else
1230 db_printf("l");
1231 }
1232 }
1233 db_printf("\t");
1234 for (first = TRUE;
1235 i_mode != 0;
1236 i_mode >>= 8, first = FALSE)
1237 {
1238 if (!first)
1239 db_printf(",");
1240
1241 switch (i_mode & 0xFF) {
1242
1243 case E:
1244 db_print_address(seg, size, &address);
1245 break;
1246
1247 case Eind:
1248 db_printf("*");
1249 db_print_address(seg, size, &address);
1250 break;
1251
1252 case El:
1253 db_print_address(seg, LONG, &address);
1254 break;
1255
1256 case Ew:
1257 db_print_address(seg, WORD, &address);
1258 break;
1259
1260 case Eb:
1261 db_print_address(seg, BYTE, &address);
1262 break;
1263
1264 case R:
1265 db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1266 break;
1267
1268 case Rw:
1269 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1270 break;
1271
1272 case Ri:
1273 db_printf("%s", db_reg[size][f_rm(inst)]);
1274 break;
1275
1276 case Ril:
1277 db_printf("%s", db_reg[LONG][f_rm(inst)]);
1278 break;
1279
1280 case S:
1281 db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1282 break;
1283
1284 case Si:
1285 db_printf("%s", db_seg_reg[f_reg(inst)]);
1286 break;
1287
1288 case A:
1289 db_printf("%s", db_reg[size][0]); /* acc */
1290 break;
1291
1292 case BX:
1293 if (seg)
1294 db_printf("%s:", seg);
1295 db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1296 break;
1297
1298 case CL:
1299 db_printf("%%cl");
1300 break;
1301
1302 case DX:
1303 db_printf("%%dx");
1304 break;
1305
1306 case SI:
1307 if (seg)
1308 db_printf("%s:", seg);
1309 db_printf("(%s)", short_addr ? "%si" : "%esi");
1310 break;
1311
1312 case DI:
1313 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
1314 break;
1315
1316 case CR:
1317 db_printf("%%cr%d", f_reg(regmodrm));
1318 break;
1319
1320 case DR:
1321 db_printf("%%dr%d", f_reg(regmodrm));
1322 break;
1323
1324 case TR:
1325 db_printf("%%tr%d", f_reg(regmodrm));
1326 break;
1327
1328 case I:
1329 len = db_lengths[size];
1330 get_value_inc(imm, loc, len, FALSE);
1331 db_printf("$%#r", imm);
1332 break;
1333
1334 case Is:
1335 len = db_lengths[size];
1336 get_value_inc(imm, loc, len, FALSE);
1337 db_printf("$%+#r", imm);
1338 break;
1339
1340 case Ib:
1341 get_value_inc(imm, loc, 1, FALSE);
1342 db_printf("$%#r", imm);
1343 break;
1344
1345 case Iba:
1346 get_value_inc(imm, loc, 1, FALSE);
1347 if (imm != 0x0a)
1348 db_printf("$%#r", imm);
1349 break;
1350
1351 case Ibs:
1352 get_value_inc(imm, loc, 1, TRUE);
1353 if (size == WORD)
1354 imm &= 0xFFFF;
1355 db_printf("$%+#r", imm);
1356 break;
1357
1358 case Iw:
1359 get_value_inc(imm, loc, 2, FALSE);
1360 db_printf("$%#r", imm);
1361 break;
1362
1363 case O:
1364 len = (short_addr ? 2 : 4);
1365 get_value_inc(displ, loc, len, FALSE);
1366 if (seg)
1367 db_printf("%s:%+#r",seg, displ);
1368 else
1369 db_printsym((db_addr_t)displ, DB_STGY_ANY);
1370 break;
1371
1372 case Db:
1373 get_value_inc(displ, loc, 1, TRUE);
1374 displ += loc;
1375 if (size == WORD)
1376 displ &= 0xFFFF;
1377 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1378 break;
1379
1380 case Dl:
1381 len = db_lengths[size];
1382 get_value_inc(displ, loc, len, FALSE);
1383 displ += loc;
1384 if (size == WORD)
1385 displ &= 0xFFFF;
1386 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1387 break;
1388
1389 case o1:
1390 db_printf("$1");
1391 break;
1392
1393 case o3:
1394 db_printf("$3");
1395 break;
1396
1397 case OS:
1398 len = db_lengths[size];
1399 get_value_inc(imm, loc, len, FALSE); /* offset */
1400 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1401 db_printf("$%#r,%#r", imm2, imm);
1402 break;
1403 }
1404 }
1405 db_printf("\n");
1406 return (loc);
1407}