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Release 961222
[wine/multimedia.git] / debugger / db_disasm.c
blobcb230c6f8acffcf566bb97a8af9481b31ed69d52
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 "AS IS"
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 Mellon
24 * the rights to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: db_disasm.c,v $
29 * Revision 2.6 92/01/03 20:05:00 dbg
30 * Add a switch to disassemble 16-bit code.
31 * Fix spelling of 'lods' opcodes.
32 * [91/10/30 dbg]
33 *
34 * Revision 2.5 91/10/09 16:05:58 af
35 * Supported disassemble of non current task by passing task parameter.
36 * [91/08/29 tak]
37 *
38 * Revision 2.4 91/05/14 16:05:04 mrt
39 * Correcting copyright
40 *
41 * Revision 2.3 91/02/05 17:11:03 mrt
42 * Changed to new Mach copyright
43 * [91/02/01 17:31:03 mrt]
44 *
45 * Revision 2.2 90/08/27 21:55:56 dbg
46 * Fix register operand for move to/from control/test/debug
47 * register instructions. Add i486 instructions.
48 * [90/08/27 dbg]
49 *
50 * Import db_sym.h. Print instruction displacements in
51 * current radix (signed). Change calling sequence of
52 * db_disasm.
53 * [90/08/21 dbg]
54 * Fix includes.
55 * [90/08/08 dbg]
56 * Created.
57 * [90/07/25 dbg]
58 *
59 */
60
61 /*
62 * Instruction disassembler.
63 */
64
65 #include <stdio.h>
66 #include "windows.h"
67 #include "debugger.h"
68
69 /*
70 * Switch to disassemble 16-bit code.
71 */
72 static BOOL32 db_disasm_16 = FALSE;
73
74 /*
75 * Size attributes
76 */
77 #define BYTE 0
78 #define WORD 1
79 #define LONG 2
80 #define QUAD 3
81 #define SNGL 4
82 #define DBLR 5
83 #define EXTR 6
84 #define SDEP 7
85 #define NONE 8
86
87 /*
88 * Addressing modes
89 */
90 #define E 1 /* general effective address */
91 #define Eind 2 /* indirect address (jump, call) */
92 #define Ew 3 /* address, word size */
93 #define Eb 4 /* address, byte size */
94 #define R 5 /* register, in 'reg' field */
95 #define Rw 6 /* word register, in 'reg' field */
96 #define Ri 7 /* register in instruction */
97 #define S 8 /* segment reg, in 'reg' field */
98 #define Si 9 /* segment reg, in instruction */
99 #define A 10 /* accumulator */
100 #define BX 11 /* (bx) */
101 #define CL 12 /* cl, for shifts */
102 #define DX 13 /* dx, for IO */
103 #define SI 14 /* si */
104 #define DI 15 /* di */
105 #define CR 16 /* control register */
106 #define DR 17 /* debug register */
107 #define TR 18 /* test register */
108 #define I 19 /* immediate, unsigned */
109 #define Is 20 /* immediate, signed */
110 #define Ib 21 /* byte immediate, unsigned */
111 #define Ibs 22 /* byte immediate, signed */
112 #define Iw 23 /* word immediate, unsigned */
113 #define Il 24 /* long immediate */
114 #define O 25 /* direct address */
115 #define Db 26 /* byte displacement from EIP */
116 #define Dl 27 /* long displacement from EIP */
117 #define o1 28 /* constant 1 */
118 #define o3 29 /* constant 3 */
119 #define OS 30 /* immediate offset/segment */
120 #define ST 31 /* FP stack top */
121 #define STI 32 /* FP stack */
122 #define X 33 /* extended FP op */
123 #define XA 34 /* for 'fstcw %ax' */
124
125 struct inst {
126 const char *i_name; /* name */
127 short i_has_modrm; /* has regmodrm byte */
128 short i_size; /* operand size */
129 int i_mode; /* addressing modes */
130 const char *i_extra; /* pointer to extra opcode table */
131 };
132
133 #define op1(x) (x)
134 #define op2(x,y) ((x)|((y)<<8))
135 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
136
137 struct finst {
138 const char *f_name; /* name for memory instruction */
139 int f_size; /* size for memory instruction */
140 int f_rrmode; /* mode for rr instruction */
141 const char *f_rrname; /* name for rr instruction
142 (or pointer to table) */
143 };
144
145 static const char * const db_Grp6[] = {
146 "sldt",
147 "str",
148 "lldt",
149 "ltr",
150 "verr",
151 "verw",
152 "",
153 ""
154 };
155
156 static const char * const db_Grp7[] = {
157 "sgdt",
158 "sidt",
159 "lgdt",
160 "lidt",
161 "smsw",
162 "",
163 "lmsw",
164 "invlpg"
165 };
166
167 static const char * const db_Grp8[] = {
168 "",
169 "",
170 "",
171 "",
172 "bt",
173 "bts",
174 "btr",
175 "btc"
176 };
177
178 static const struct inst db_inst_0f0x[] = {
179 /*00*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp6 },
180 /*01*/ { "", TRUE, NONE, op1(Ew), (char *)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*/ { "", FALSE, NONE, 0, 0 },
185 /*06*/ { "clts", FALSE, NONE, 0, 0 },
186 /*07*/ { "", 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
198 static const struct inst db_inst_0f2x[] = {
199 /*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */
200 /*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */
201 /*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 },
202 /*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 },
203 /*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 },
204 /*25*/ { "", FALSE, NONE, 0, 0 },
205 /*26*/ { "mov", TRUE, LONG, op2(E,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
218 static const struct inst db_inst_0f8x[] = {
219 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
220 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
221 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
222 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
223 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
224 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
225 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
226 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
227
228 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
229 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
230 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
231 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
232 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
233 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
234 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
235 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
236 };
237
238 static const struct inst db_inst_0f9x[] = {
239 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
240 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
241 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
242 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
243 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
244 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
245 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
246 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
247
248 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
249 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
250 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
251 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
252 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
253 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
254 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
255 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
256 };
257
258 static const struct inst db_inst_0fax[] = {
259 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
260 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
261 /*a2*/ { "", FALSE, NONE, 0, 0 },
262 /*a3*/ { "bt", TRUE, LONG, op2(E,R), 0 },
263 /*a4*/ { "shld", TRUE, LONG, op3(Ib,E,R), 0 },
264 /*a5*/ { "shld", TRUE, LONG, op3(CL,E,R), 0 },
265 /*a6*/ { "", FALSE, NONE, 0, 0 },
266 /*a7*/ { "", FALSE, NONE, 0, 0 },
267
268 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
269 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
270 /*aa*/ { "", FALSE, NONE, 0, 0 },
271 /*ab*/ { "bts", TRUE, LONG, op2(E,R), 0 },
272 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 },
273 /*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 },
274 /*a6*/ { "", FALSE, NONE, 0, 0 },
275 /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 },
276 };
277
278 static const struct inst db_inst_0fbx[] = {
279 /*b0*/ { "", FALSE, NONE, 0, 0 },
280 /*b1*/ { "", FALSE, NONE, 0, 0 },
281 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
282 /*b3*/ { "bts", TRUE, LONG, op2(R, E), 0 },
283 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
284 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
285 /*b6*/ { "movzb", TRUE, LONG, op2(E, R), 0 },
286 /*b7*/ { "movzw", TRUE, LONG, op2(E, R), 0 },
287
288 /*b8*/ { "", FALSE, NONE, 0, 0 },
289 /*b9*/ { "", FALSE, NONE, 0, 0 },
290 /*ba*/ { "", TRUE, LONG, op2(Is, E), (char *)db_Grp8 },
291 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
292 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
293 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
294 /*be*/ { "movsb", TRUE, LONG, op2(E, R), 0 },
295 /*bf*/ { "movsw", TRUE, LONG, op2(E, R), 0 },
296 };
297
298 static const struct inst db_inst_0fcx[] = {
299 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
300 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
301 /*c2*/ { "", FALSE, NONE, 0, 0 },
302 /*c3*/ { "", FALSE, NONE, 0, 0 },
303 /*c4*/ { "", FALSE, NONE, 0, 0 },
304 /*c5*/ { "", FALSE, NONE, 0, 0 },
305 /*c6*/ { "", FALSE, NONE, 0, 0 },
306 /*c7*/ { "", FALSE, NONE, 0, 0 },
307 /*c8*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
308 /*c9*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
309 /*ca*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
310 /*cb*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
311 /*cc*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
312 /*cd*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
313 /*ce*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
314 /*cf*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
315 };
316
317 static const struct inst db_inst_0fdx[] = {
318 /*c0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
319 /*c1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
320 /*c2*/ { "", FALSE, NONE, 0, 0 },
321 /*c3*/ { "", FALSE, NONE, 0, 0 },
322 /*c4*/ { "", FALSE, NONE, 0, 0 },
323 /*c5*/ { "", FALSE, NONE, 0, 0 },
324 /*c6*/ { "", FALSE, NONE, 0, 0 },
325 /*c7*/ { "", FALSE, NONE, 0, 0 },
326 /*c8*/ { "", FALSE, NONE, 0, 0 },
327 /*c9*/ { "", FALSE, NONE, 0, 0 },
328 /*ca*/ { "", FALSE, NONE, 0, 0 },
329 /*cb*/ { "", FALSE, NONE, 0, 0 },
330 /*cc*/ { "", FALSE, NONE, 0, 0 },
331 /*cd*/ { "", FALSE, NONE, 0, 0 },
332 /*ce*/ { "", FALSE, NONE, 0, 0 },
333 /*cf*/ { "", FALSE, NONE, 0, 0 },
334 };
335
336 static const struct inst * const db_inst_0f[] = {
337 db_inst_0f0x,
338 0,
339 db_inst_0f2x,
340 0,
341 0,
342 0,
343 0,
344 0,
345 db_inst_0f8x,
346 db_inst_0f9x,
347 db_inst_0fax,
348 db_inst_0fbx,
349 db_inst_0fcx,
350 db_inst_0fdx,
351 0,
352 0
353 };
354
355 static const char * const db_Esc92[] = {
356 "fnop", "", "", "", "", "", "", ""
357 };
358 static const char * const db_Esc93[] = {
359 "", "", "", "", "", "", "", ""
360 };
361 static const char * const db_Esc94[] = {
362 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
363 };
364 static const char * const db_Esc95[] = {
365 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
366 };
367 static const char * const db_Esc96[] = {
368 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
369 "fincstp"
370 };
371 static const char * const db_Esc97[] = {
372 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
373 };
374
375 static const char * const db_Esca4[] = {
376 "", "fucompp","", "", "", "", "", ""
377 };
378
379 static const char * const db_Escb4[] = {
380 "", "", "fnclex","fninit","", "", "", ""
381 };
382
383 static const char * const db_Esce3[] = {
384 "", "fcompp","", "", "", "", "", ""
385 };
386
387 static const char * const db_Escf4[] = {
388 "fnstsw","", "", "", "", "", "", ""
389 };
390
391 static const struct finst db_Esc8[] = {
392 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
393 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
394 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
395 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
396 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
397 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
398 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
399 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
400 };
401
402 static const struct finst db_Esc9[] = {
403 /*0*/ { "fld", SNGL, op1(STI), 0 },
404 /*1*/ { "", NONE, op1(STI), "fxch" },
405 /*2*/ { "fst", SNGL, op1(X), (char *)db_Esc92 },
406 /*3*/ { "fstp", SNGL, op1(X), (char *)db_Esc93 },
407 /*4*/ { "fldenv", NONE, op1(X), (char *)db_Esc94 },
408 /*5*/ { "fldcw", NONE, op1(X), (char *)db_Esc95 },
409 /*6*/ { "fnstenv",NONE, op1(X), (char *)db_Esc96 },
410 /*7*/ { "fnstcw", NONE, op1(X), (char *)db_Esc97 },
411 };
412
413 static const struct finst db_Esca[] = {
414 /*0*/ { "fiadd", WORD, 0, 0 },
415 /*1*/ { "fimul", WORD, 0, 0 },
416 /*2*/ { "ficom", WORD, 0, 0 },
417 /*3*/ { "ficomp", WORD, 0, 0 },
418 /*4*/ { "fisub", WORD, op1(X), (char *)db_Esca4 },
419 /*5*/ { "fisubr", WORD, 0, 0 },
420 /*6*/ { "fidiv", WORD, 0, 0 },
421 /*7*/ { "fidivr", WORD, 0, 0 }
422 };
423
424 static const struct finst db_Escb[] = {
425 /*0*/ { "fild", WORD, 0, 0 },
426 /*1*/ { "", NONE, 0, 0 },
427 /*2*/ { "fist", WORD, 0, 0 },
428 /*3*/ { "fistp", WORD, 0, 0 },
429 /*4*/ { "", WORD, op1(X), (char *)db_Escb4 },
430 /*5*/ { "fld", EXTR, 0, 0 },
431 /*6*/ { "", WORD, 0, 0 },
432 /*7*/ { "fstp", EXTR, 0, 0 },
433 };
434
435 static const struct finst db_Escc[] = {
436 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
437 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
438 /*2*/ { "fcom", DBLR, op2(ST,STI), 0 },
439 /*3*/ { "fcomp", DBLR, op2(ST,STI), 0 },
440 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
441 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
442 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
443 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
444 };
445
446 static const struct finst db_Escd[] = {
447 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
448 /*1*/ { "", NONE, 0, 0 },
449 /*2*/ { "fst", DBLR, op1(STI), 0 },
450 /*3*/ { "fstp", DBLR, op1(STI), 0 },
451 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
452 /*5*/ { "", NONE, op1(STI), "fucomp" },
453 /*6*/ { "fnsave", NONE, 0, 0 },
454 /*7*/ { "fnstsw", NONE, 0, 0 },
455 };
456
457 static const struct finst db_Esce[] = {
458 /*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" },
459 /*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" },
460 /*2*/ { "ficom", LONG, 0, 0 },
461 /*3*/ { "ficomp", LONG, op1(X), (char *)db_Esce3 },
462 /*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" },
463 /*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" },
464 /*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" },
465 /*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" },
466 };
467
468 static const struct finst db_Escf[] = {
469 /*0*/ { "fild", LONG, 0, 0 },
470 /*1*/ { "", LONG, 0, 0 },
471 /*2*/ { "fist", LONG, 0, 0 },
472 /*3*/ { "fistp", LONG, 0, 0 },
473 /*4*/ { "fbld", NONE, op1(XA), (char *)db_Escf4 },
474 /*5*/ { "fld", QUAD, 0, 0 },
475 /*6*/ { "fbstp", NONE, 0, 0 },
476 /*7*/ { "fstp", QUAD, 0, 0 },
477 };
478
479 static const struct finst * const db_Esc_inst[] = {
480 db_Esc8, db_Esc9, db_Esca, db_Escb,
481 db_Escc, db_Escd, db_Esce, db_Escf
482 };
483
484 static const char * const db_Grp1[] = {
485 "add",
486 "or",
487 "adc",
488 "sbb",
489 "and",
490 "sub",
491 "xor",
492 "cmp"
493 };
494
495 static const char * const db_Grp2[] = {
496 "rol",
497 "ror",
498 "rcl",
499 "rcr",
500 "shl",
501 "shr",
502 "shl",
503 "sar"
504 };
505
506 static const struct inst db_Grp3[] = {
507 { "test", TRUE, NONE, op2(I,E), 0 },
508 { "test", TRUE, NONE, op2(I,E), 0 },
509 { "not", TRUE, NONE, op1(E), 0 },
510 { "neg", TRUE, NONE, op1(E), 0 },
511 { "mul", TRUE, NONE, op2(E,A), 0 },
512 { "imul", TRUE, NONE, op2(E,A), 0 },
513 { "div", TRUE, NONE, op2(E,A), 0 },
514 { "idiv", TRUE, NONE, op2(E,A), 0 },
515 };
516
517 static const struct inst db_Grp4[] = {
518 { "inc", TRUE, BYTE, op1(E), 0 },
519 { "dec", TRUE, BYTE, op1(E), 0 },
520 { "", TRUE, NONE, 0, 0 },
521 { "", TRUE, NONE, 0, 0 },
522 { "", TRUE, NONE, 0, 0 },
523 { "", TRUE, NONE, 0, 0 },
524 { "", TRUE, NONE, 0, 0 },
525 { "", TRUE, NONE, 0, 0 }
526 };
527
528 static const struct inst db_Grp5[] = {
529 { "inc", TRUE, LONG, op1(E), 0 },
530 { "dec", TRUE, LONG, op1(E), 0 },
531 { "call", TRUE, NONE, op1(Eind),0 },
532 { "lcall", TRUE, NONE, op1(Eind),0 },
533 { "jmp", TRUE, NONE, op1(Eind),0 },
534 { "ljmp", TRUE, NONE, op1(Eind),0 },
535 { "push", TRUE, LONG, op1(E), 0 },
536 { "", TRUE, NONE, 0, 0 }
537 };
538
539 static const struct inst db_inst_table[256] = {
540 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
541 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
542 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
543 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
544 /*04*/ { "add", FALSE, BYTE, op2(Is, A), 0 },
545 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
546 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
547 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
548
549 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
550 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
551 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
552 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
553 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
554 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
555 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
556 /*0f*/ { "", FALSE, NONE, 0, 0 },
557
558 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
559 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
560 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
561 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
562 /*14*/ { "adc", FALSE, BYTE, op2(Is, A), 0 },
563 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
564 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
565 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
566
567 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
568 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
569 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
570 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
571 /*1c*/ { "sbb", FALSE, BYTE, op2(Is, A), 0 },
572 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
573 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
574 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
575
576 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
577 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
578 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
579 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
580 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
581 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
582 /*26*/ { "", FALSE, NONE, 0, 0 },
583 /*27*/ { "aaa", FALSE, NONE, 0, 0 },
584
585 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
586 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
587 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
588 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
589 /*2c*/ { "sub", FALSE, BYTE, op2(Is, A), 0 },
590 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
591 /*2e*/ { "", FALSE, NONE, 0, 0 },
592 /*2f*/ { "das", FALSE, NONE, 0, 0 },
593
594 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
595 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
596 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
597 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
598 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
599 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
600 /*36*/ { "", FALSE, NONE, 0, 0 },
601 /*37*/ { "daa", FALSE, NONE, 0, 0 },
602
603 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
604 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
605 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
606 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
607 /*3c*/ { "cmp", FALSE, BYTE, op2(Is, A), 0 },
608 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
609 /*3e*/ { "", FALSE, NONE, 0, 0 },
610 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
611
612 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
613 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
614 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
615 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
616 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
617 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
618 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
619 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
620
621 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
622 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
623 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
624 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
625 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
626 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
627 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
628 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
629
630 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
631 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
632 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
633 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
634 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
635 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
636 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
637 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
638
639 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
640 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
641 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
642 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
643 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
644 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
645 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
646 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
647
648 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
649 /*61*/ { "popa", FALSE, LONG, 0, 0 },
650 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
651 /*63*/ { "arpl", TRUE, NONE, op2(Ew,Rw), 0 },
652
653 /*64*/ { "", FALSE, NONE, 0, 0 },
654 /*65*/ { "", FALSE, NONE, 0, 0 },
655 /*66*/ { "", FALSE, NONE, 0, 0 },
656 /*67*/ { "", FALSE, NONE, 0, 0 },
657
658 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
659 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
660 /*6a*/ { "push", FALSE, LONG, op1(Ib), 0 },
661 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
662 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
663 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
664 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
665 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
666
667 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
668 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
669 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
670 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
671 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
672 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
673 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
674 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
675
676 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
677 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
678 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
679 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
680 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
681 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
682 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
683 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
684
685 /*80*/ { "", TRUE, BYTE, op2(I, E), (char *)db_Grp1 },
686 /*81*/ { "", TRUE, LONG, op2(I, E), (char *)db_Grp1 },
687 /*82*/ { "", TRUE, BYTE, op2(Is,E), (char *)db_Grp1 },
688 /*83*/ { "", TRUE, LONG, op2(Ibs,E), (char *)db_Grp1 },
689 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
690 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
691 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
692 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
693
694 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
695 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
696 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
697 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
698 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
699 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
700 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
701 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
702
703 /*90*/ { "nop", FALSE, NONE, 0, 0 },
704 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
705 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
706 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
707 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
708 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
709 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
710 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
711
712 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
713 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
714 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
715 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
716 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
717 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
718 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
719 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
720
721 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
722 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
723 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
724 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
725 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
726 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
727 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
728 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
729
730 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
731 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
732 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
733 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
734 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
735 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
736 /*ae*/ { "scas", FALSE, BYTE, op1(DI), 0 },
737 /*af*/ { "scas", FALSE, LONG, op1(DI), 0 },
738
739 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
740 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
741 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
742 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
743 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
744 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
745 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
746 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
747
748 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
749 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
750 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
751 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
752 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
753 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
754 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
755 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
756
757 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), (char *)db_Grp2 },
758 /*c1*/ { "", TRUE, LONG, op2(Ib, E), (char *)db_Grp2 },
759 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
760 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
761 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
762 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
763 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
764 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
765
766 /*c8*/ { "enter", FALSE, NONE, op2(Ib, Iw), 0 },
767 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
768 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
769 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
770 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
771 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
772 /*ce*/ { "into", FALSE, NONE, 0, 0 },
773 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
774
775 /*d0*/ { "", TRUE, BYTE, op2(o1, E), (char *)db_Grp2 },
776 /*d1*/ { "", TRUE, LONG, op2(o1, E), (char *)db_Grp2 },
777 /*d2*/ { "", TRUE, BYTE, op2(CL, E), (char *)db_Grp2 },
778 /*d3*/ { "", TRUE, LONG, op2(CL, E), (char *)db_Grp2 },
779 /*d4*/ { "aam", TRUE, NONE, 0, 0 },
780 /*d5*/ { "aad", TRUE, NONE, 0, 0 },
781 /*d6*/ { "", FALSE, NONE, 0, 0 },
782 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
783
784 /*d8*/ { "", TRUE, NONE, 0, (char *)db_Esc8 },
785 /*d9*/ { "", TRUE, NONE, 0, (char *)db_Esc9 },
786 /*da*/ { "", TRUE, NONE, 0, (char *)db_Esca },
787 /*db*/ { "", TRUE, NONE, 0, (char *)db_Escb },
788 /*dc*/ { "", TRUE, NONE, 0, (char *)db_Escc },
789 /*dd*/ { "", TRUE, NONE, 0, (char *)db_Escd },
790 /*de*/ { "", TRUE, NONE, 0, (char *)db_Esce },
791 /*df*/ { "", TRUE, NONE, 0, (char *)db_Escf },
792
793 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
794 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
795 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
796 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
797 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
798 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
799 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
800 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
801
802 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
803 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
804 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
805 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
806 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
807 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
808 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
809 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
810
811 /*f0*/ { "", FALSE, NONE, 0, 0 },
812 /*f1*/ { "", FALSE, NONE, 0, 0 },
813 /*f2*/ { "", FALSE, NONE, 0, 0 },
814 /*f3*/ { "", FALSE, NONE, 0, 0 },
815 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
816 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
817 /*f6*/ { "", TRUE, BYTE, 0, (char *)db_Grp3 },
818 /*f7*/ { "", TRUE, LONG, 0, (char *)db_Grp3 },
819
820 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
821 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
822 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
823 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
824 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
825 /*fd*/ { "std", FALSE, NONE, 0, 0 },
826 /*fe*/ { "", TRUE, NONE, 0, (char *)db_Grp4 },
827 /*ff*/ { "", TRUE, NONE, 0, (char *)db_Grp5 },
828 };
829
830 static const struct inst db_bad_inst =
831 { "???", FALSE, NONE, 0, 0 }
832 ;
833
834 #define f_mod(byte) ((byte)>>6)
835 #define f_reg(byte) (((byte)>>3)&0x7)
836 #define f_rm(byte) ((byte)&0x7)
837
838 #define sib_ss(byte) ((byte)>>6)
839 #define sib_index(byte) (((byte)>>3)&0x7)
840 #define sib_base(byte) ((byte)&0x7)
841
842 struct i_addr {
843 int is_reg; /* if reg, reg number is in 'disp' */
844 int disp;
845 const char * base;
846 const char * index;
847 int ss;
848 };
849
850 static const char * const db_index_reg_16[8] = {
851 "%bx,%si",
852 "%bx,%di",
853 "%bp,%si",
854 "%bp,%di",
855 "%si",
856 "%di",
857 "%bp",
858 "%bx"
859 };
860
861 static const char * const db_reg[3][8] = {
862 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" },
863 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" },
864 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
865 };
866
867 static const char * const db_seg_reg[8] = {
868 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
869 };
870
871 /*
872 * lengths for size attributes
873 */
874 static const int db_lengths[] = {
875 1, /* BYTE */
876 2, /* WORD */
877 4, /* LONG */
878 8, /* QUAD */
879 4, /* SNGL */
880 8, /* DBLR */
881 10, /* EXTR */
882 };
883
884 static unsigned int db_get_task_value( const DBG_ADDR *addr,
885 int size, int is_signed )
886 {
887 unsigned int result;
888 unsigned char *p = DBG_ADDR_TO_LIN( addr );
889
890 switch(size)
891 {
892 case 4:
893 if (is_signed) result = (unsigned int) *(int *)p;
894 else result = *(unsigned int *)p;
895 break;
896 case 2:
897 if (is_signed) result = (unsigned int) *(short int *)p;
898 else result = *(unsigned short int *)p;
899 break;
900 case 1:
901 if (is_signed) result = (unsigned int) *(char *)p;
902 else result = *(unsigned char *)p;
903 break;
904 default:
905 fprintf(stderr, "Illegal size specified\n");
906 result = 0;
907 break;
908 }
909 return result;
910 }
911
912 #define get_value_inc(result, addr, size, is_signed) \
913 result = db_get_task_value((addr), (size), (is_signed)); \
914 if (!db_disasm_16) (addr)->off += (size); \
915 else (addr)->off = ((addr)->off + (size)) & 0xffff;
916
917 /*
918 * Read address at location and return updated location.
919 */
920 void db_read_address( DBG_ADDR *addr, int short_addr, int regmodrm,
921 struct i_addr *addrp )
922 {
923 int mod, rm, sib, index, disp;
924
925 mod = f_mod(regmodrm);
926 rm = f_rm(regmodrm);
927
928 if (mod == 3) {
929 addrp->is_reg = TRUE;
930 addrp->disp = rm;
931 return;
932 }
933 addrp->is_reg = FALSE;
934 addrp->index = 0;
935
936 if (short_addr) {
937 addrp->index = 0;
938 addrp->ss = 0;
939 switch (mod) {
940 case 0:
941 if (rm == 6) {
942 get_value_inc(disp, addr, 2, TRUE);
943 addrp->disp = disp;
944 addrp->base = 0;
945 }
946 else {
947 addrp->disp = 0;
948 addrp->base = db_index_reg_16[rm];
949 }
950 break;
951 case 1:
952 get_value_inc(disp, addr, 1, TRUE);
953 addrp->disp = disp;
954 addrp->base = db_index_reg_16[rm];
955 break;
956 case 2:
957 get_value_inc(disp, addr, 2, TRUE);
958 addrp->disp = disp;
959 addrp->base = db_index_reg_16[rm];
960 break;
961 }
962 }
963 else {
964 if (mod != 3 && rm == 4) {
965 get_value_inc(sib, addr, 1, FALSE);
966 rm = sib_base(sib);
967 index = sib_index(sib);
968 if (index != 4)
969 addrp->index = db_reg[LONG][index];
970 addrp->ss = sib_ss(sib);
971 }
972
973 switch (mod) {
974 case 0:
975 if (rm == 5) {
976 get_value_inc(addrp->disp, addr, 4, FALSE);
977 addrp->base = 0;
978 }
979 else {
980 addrp->disp = 0;
981 addrp->base = db_reg[LONG][rm];
982 }
983 break;
984
985 case 1:
986 get_value_inc(disp, addr, 1, TRUE);
987 addrp->disp = disp;
988 addrp->base = db_reg[LONG][rm];
989 break;
990
991 case 2:
992 get_value_inc(disp, addr, 4, FALSE);
993 addrp->disp = disp;
994 addrp->base = db_reg[LONG][rm];
995 break;
996 }
997 }
998 }
999
1000 static void db_task_printsym(unsigned int addr, int size)
1001 {
1002 switch(size)
1003 {
1004 case BYTE:
1005 fprintf(stderr, "0x%2.2x", addr & 0xff );
1006 break;
1007 case WORD:
1008 fprintf(stderr, "0x%4.4x", addr & 0xffff );
1009 break;
1010 case LONG:
1011 {
1012 DBG_ADDR address = { 0, addr };
1013 DEBUG_PrintAddress( &address, db_disasm_16 ? 16 : 32, TRUE );
1014 }
1015 break;
1016 }
1017 }
1018
1019 void
1020 db_print_address(seg, size, addrp)
1021 char * seg;
1022 int size;
1023 struct i_addr *addrp;
1024 {
1025 if (addrp->is_reg) {
1026 fprintf(stderr,"%s", db_reg[size][addrp->disp]);
1027 return;
1028 }
1029
1030 if (seg) {
1031 fprintf(stderr,"%s:", seg);
1032 }
1033
1034 if (addrp->base != 0 || addrp->index != 0) {
1035 fprintf(stderr,"0x%x", addrp->disp);
1036 fprintf(stderr,"(");
1037 if (addrp->base)
1038 fprintf(stderr,"%s", addrp->base);
1039 if (addrp->index)
1040 fprintf(stderr,",%s,%d", addrp->index, 1<<addrp->ss);
1041 fprintf(stderr,")");
1042 } else
1043 db_task_printsym(addrp->disp, size);
1044 }
1045
1046 /*
1047 * Disassemble floating-point ("escape") instruction
1048 * and return updated location.
1049 */
1050 void db_disasm_esc( DBG_ADDR *addr, int inst, int short_addr,
1051 int size, char *seg )
1052 {
1053 int regmodrm;
1054 const struct finst *fp;
1055 int mod;
1056 struct i_addr address;
1057 const char * name;
1058
1059 get_value_inc(regmodrm, addr, 1, FALSE);
1060 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1061 mod = f_mod(regmodrm);
1062 if (mod != 3) {
1063 /*
1064 * Normal address modes.
1065 */
1066 db_read_address( addr, short_addr, regmodrm, &address);
1067 fprintf(stderr,fp->f_name);
1068 switch(fp->f_size) {
1069 case SNGL:
1070 fprintf(stderr,"s");
1071 break;
1072 case DBLR:
1073 fprintf(stderr,"l");
1074 break;
1075 case EXTR:
1076 fprintf(stderr,"t");
1077 break;
1078 case WORD:
1079 fprintf(stderr,"s");
1080 break;
1081 case LONG:
1082 fprintf(stderr,"l");
1083 break;
1084 case QUAD:
1085 fprintf(stderr,"q");
1086 break;
1087 default:
1088 break;
1089 }
1090 fprintf(stderr,"\t");
1091 db_print_address(seg, BYTE, &address);
1092 }
1093 else {
1094 /*
1095 * 'reg-reg' - special formats
1096 */
1097 switch (fp->f_rrmode) {
1098 case op2(ST,STI):
1099 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1100 fprintf(stderr,"%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1101 break;
1102 case op2(STI,ST):
1103 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1104 fprintf(stderr,"%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1105 break;
1106 case op1(STI):
1107 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1108 fprintf(stderr,"%s\t%%st(%d)",name, f_rm(regmodrm));
1109 break;
1110 case op1(X):
1111 fprintf(stderr,"%s", ((char **)fp->f_rrname)[f_rm(regmodrm)]);
1112 break;
1113 case op1(XA):
1114 fprintf(stderr,"%s\t%%ax",
1115 ((char **)fp->f_rrname)[f_rm(regmodrm)]);
1116 break;
1117 default:
1118 fprintf(stderr,"<bad instruction>");
1119 break;
1120 }
1121 }
1122 }
1123
1124
1125 /***********************************************************************
1126 * DEBUG_Disasm
1127 *
1128 * Disassemble instruction at 'addr'. addr is changed to point to the
1129 * start of the next instruction.
1130 */
1131 void DEBUG_Disasm( DBG_ADDR *addr )
1132 {
1133 int inst;
1134 int size;
1135 int short_addr;
1136 char * seg;
1137 const struct inst *ip;
1138 const char *i_name;
1139 int i_size;
1140 int i_mode;
1141 int regmodrm = 0;
1142 BOOL32 first;
1143 int displ;
1144 int prefix;
1145 int imm;
1146 int len;
1147 struct i_addr address;
1148
1149 if (!addr->seg) db_disasm_16 = FALSE;
1150 else db_disasm_16 = !(GET_SEL_FLAGS(addr->seg) & LDT_FLAGS_32BIT);
1151
1152 get_value_inc( inst, addr, 1, FALSE );
1153
1154 if (db_disasm_16) {
1155 short_addr = TRUE;
1156 size = WORD;
1157 }
1158 else {
1159 short_addr = FALSE;
1160 size = LONG;
1161 }
1162 seg = 0;
1163
1164 /*
1165 * Get prefixes
1166 */
1167 prefix = TRUE;
1168 do {
1169 switch (inst) {
1170 case 0x66: /* data16 */
1171 if (size == LONG)
1172 size = WORD;
1173 else
1174 size = LONG;
1175 break;
1176 case 0x67:
1177 short_addr = !short_addr;
1178 break;
1179 case 0x26:
1180 seg = "%es";
1181 break;
1182 case 0x36:
1183 seg = "%ss";
1184 break;
1185 case 0x2e:
1186 seg = "%cs";
1187 break;
1188 case 0x3e:
1189 seg = "%ds";
1190 break;
1191 case 0x64:
1192 seg = "%fs";
1193 break;
1194 case 0x65:
1195 seg = "%gs";
1196 break;
1197 case 0xf0:
1198 fprintf(stderr,"lock ");
1199 break;
1200 case 0xf2:
1201 fprintf(stderr,"repne ");
1202 break;
1203 case 0xf3:
1204 fprintf(stderr,"repe "); /* XXX repe VS rep */
1205 break;
1206 default:
1207 prefix = FALSE;
1208 break;
1209 }
1210 if (prefix) {
1211 get_value_inc(inst, addr, 1, FALSE);
1212 }
1213 } while (prefix);
1214
1215 if (inst >= 0xd8 && inst <= 0xdf)
1216 {
1217 db_disasm_esc( addr, inst, short_addr, size, seg);
1218 return;
1219 }
1220
1221 if (inst == 0x0f) {
1222 get_value_inc(inst, addr, 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, addr, 1, FALSE);
1236 db_read_address( addr, 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 == (char *)db_Grp1 ||
1244 ip->i_extra == (char *)db_Grp2 ||
1245 ip->i_extra == (char *)db_Grp6 ||
1246 ip->i_extra == (char *)db_Grp7 ||
1247 ip->i_extra == (char *)db_Grp8) {
1248 i_name = ((char **)ip->i_extra)[f_reg(regmodrm)];
1249 }
1250 else if (ip->i_extra == (char *)db_Grp3) {
1251 ip = (struct inst *)ip->i_extra;
1252 ip = &ip[f_reg(regmodrm)];
1253 i_name = ip->i_name;
1254 i_mode = ip->i_mode;
1255 }
1256 else if (ip->i_extra == (char *)db_Grp4 ||
1257 ip->i_extra == (char *)db_Grp5) {
1258 ip = (struct inst *)ip->i_extra;
1259 ip = &ip[f_reg(regmodrm)];
1260 i_name = ip->i_name;
1261 i_mode = ip->i_mode;
1262 i_size = ip->i_size;
1263 }
1264
1265 if (i_size == SDEP) {
1266 if (size == WORD)
1267 fprintf(stderr,i_name);
1268 else
1269 fprintf(stderr,ip->i_extra);
1270 }
1271 else {
1272 fprintf(stderr,i_name);
1273 if (i_size != NONE) {
1274 if (i_size == BYTE) {
1275 fprintf(stderr,"b");
1276 size = BYTE;
1277 }
1278 else if (i_size == WORD) {
1279 fprintf(stderr,"w");
1280 size = WORD;
1281 }
1282 else if (size == WORD)
1283 fprintf(stderr,"w");
1284 else
1285 fprintf(stderr,"l");
1286 }
1287 }
1288 fprintf(stderr,"\t");
1289 for (first = TRUE;
1290 i_mode != 0;
1291 i_mode >>= 8, first = FALSE)
1292 {
1293 if (!first)
1294 fprintf(stderr,",");
1295
1296 switch (i_mode & 0xFF) {
1297
1298 case E:
1299 db_print_address(seg, size, &address);
1300 break;
1301
1302 case Eind:
1303 fprintf(stderr,"*");
1304 db_print_address(seg, size, &address);
1305 break;
1306
1307 case Ew:
1308 db_print_address(seg, WORD, &address);
1309 break;
1310
1311 case Eb:
1312 db_print_address(seg, BYTE, &address);
1313 break;
1314
1315 case R:
1316 fprintf(stderr,"%s", db_reg[size][f_reg(regmodrm)]);
1317 break;
1318
1319 case Rw:
1320 fprintf(stderr,"%s", db_reg[WORD][f_reg(regmodrm)]);
1321 break;
1322
1323 case Ri:
1324 fprintf(stderr,"%s", db_reg[size][f_rm(inst)]);
1325 break;
1326
1327 case S:
1328 fprintf(stderr,"%s", db_seg_reg[f_reg(regmodrm)]);
1329 break;
1330
1331 case Si:
1332 fprintf(stderr,"%s", db_seg_reg[f_reg(inst)]);
1333 break;
1334
1335 case A:
1336 fprintf(stderr,"%s", db_reg[size][0]); /* acc */
1337 break;
1338
1339 case BX:
1340 if (seg)
1341 fprintf(stderr,"%s:", seg);
1342 fprintf(stderr,"(%s)", short_addr ? "%bx" : "%ebx");
1343 break;
1344
1345 case CL:
1346 fprintf(stderr,"%%cl");
1347 break;
1348
1349 case DX:
1350 fprintf(stderr,"%%dx");
1351 break;
1352
1353 case SI:
1354 if (seg)
1355 fprintf(stderr,"%s:", seg);
1356 fprintf(stderr,"(%s)", short_addr ? "%si" : "%esi");
1357 break;
1358
1359 case DI:
1360 fprintf(stderr,"%%es:(%s)", short_addr ? "%di" : "%edi");
1361 break;
1362
1363 case CR:
1364 fprintf(stderr,"%%cr%d", f_reg(regmodrm));
1365 break;
1366
1367 case DR:
1368 fprintf(stderr,"%%dr%d", f_reg(regmodrm));
1369 break;
1370
1371 case TR:
1372 fprintf(stderr,"%%tr%d", f_reg(regmodrm));
1373 break;
1374
1375 case I:
1376 len = db_lengths[size];
1377 get_value_inc(imm, addr, len, FALSE);/* unsigned */
1378 fprintf(stderr,"$0x%x", imm);
1379 break;
1380
1381 case Is:
1382 len = db_lengths[size];
1383 get_value_inc(imm, addr, len, TRUE); /* signed */
1384 fprintf(stderr,"$%d", imm);
1385 break;
1386
1387 case Ib:
1388 get_value_inc(imm, addr, 1, FALSE); /* unsigned */
1389 fprintf(stderr,"$0x%x", imm);
1390 break;
1391
1392 case Ibs:
1393 get_value_inc(imm, addr, 1, TRUE); /* signed */
1394 fprintf(stderr,"$%d", imm);
1395 break;
1396
1397 case Iw:
1398 get_value_inc(imm, addr, 2, FALSE); /* unsigned */
1399 fprintf(stderr,"$0x%x", imm);
1400 break;
1401
1402 case Il:
1403 get_value_inc(imm, addr, 4, FALSE);
1404 fprintf(stderr,"$0x%x", imm);
1405 break;
1406
1407 case O:
1408 if (short_addr) {
1409 get_value_inc(displ, addr, 2, TRUE);
1410 }
1411 else {
1412 get_value_inc(displ, addr, 4, TRUE);
1413 }
1414 if (seg)
1415 fprintf(stderr,"%s:%d",seg, displ);
1416 else
1417 db_task_printsym(displ, short_addr ? WORD : LONG);
1418 break;
1419
1420 case Db:
1421 get_value_inc(displ, addr, 1, TRUE);
1422 if (short_addr) {
1423 /* offset only affects low 16 bits */
1424 displ = (addr->off & 0xffff0000)
1425 | ((addr->off + displ) & 0xffff);
1426 }
1427 else displ += addr->off;
1428 db_task_printsym(displ, short_addr ? WORD : LONG);
1429 break;
1430
1431 case Dl:
1432 if (short_addr) {
1433 get_value_inc(displ, addr, 2, TRUE);
1434 /* offset only affects low 16 bits */
1435 displ = (addr->off & 0xffff0000)
1436 | ((addr->off + displ) & 0xffff);
1437 }
1438 else {
1439 get_value_inc(displ, addr, 4, TRUE);
1440 displ += addr->off;
1441 }
1442 db_task_printsym( displ, short_addr ? WORD : LONG);
1443 break;
1444
1445 case o1:
1446 fprintf(stderr,"$1");
1447 break;
1448
1449 case o3:
1450 fprintf(stderr,"$3");
1451 break;
1452
1453 case OS:
1454 {
1455 DBG_ADDR address;
1456 get_value_inc( address.off, addr, /* offset */
1457 short_addr ? 2 : 4, FALSE );
1458 get_value_inc( address.seg, addr, /* segment */
1459 2, FALSE );
1460 DEBUG_PrintAddress( &address, short_addr ? 16 : 32,
1461 TRUE );
1462 }
1463 break;
1464 }
1465 }
1466 }
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