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Release 950522
[wine.git] / debugger / db_disasm.c
blobfe64594de15f30cab971a44411bad49c6068f185
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 #if 0
65 #include <mach/boolean.h>
66 #include "db_machdep.h"
67
68 #include "db_access.h"
69 #include "db_sym.h"
70
71 #include <kern/task.h>
72 #endif
73 #include <stdio.h>
74 #include "db_disasm.h"
75 #include "ldt.h"
76
77 extern void print_address(unsigned int addr, FILE * outfile, int addrlen);
78
79 /*
80 * Switch to disassemble 16-bit code.
81 */
82 static boolean_t db_disasm_16 = FALSE;
83
84 /*
85 * Size attributes
86 */
87 #define BYTE 0
88 #define WORD 1
89 #define LONG 2
90 #define QUAD 3
91 #define SNGL 4
92 #define DBLR 5
93 #define EXTR 6
94 #define SDEP 7
95 #define NONE 8
96
97 /*
98 * Addressing modes
99 */
100 #define E 1 /* general effective address */
101 #define Eind 2 /* indirect address (jump, call) */
102 #define Ew 3 /* address, word size */
103 #define Eb 4 /* address, byte size */
104 #define R 5 /* register, in 'reg' field */
105 #define Rw 6 /* word register, in 'reg' field */
106 #define Ri 7 /* register in instruction */
107 #define S 8 /* segment reg, in 'reg' field */
108 #define Si 9 /* segment reg, in instruction */
109 #define A 10 /* accumulator */
110 #define BX 11 /* (bx) */
111 #define CL 12 /* cl, for shifts */
112 #define DX 13 /* dx, for IO */
113 #define SI 14 /* si */
114 #define DI 15 /* di */
115 #define CR 16 /* control register */
116 #define DR 17 /* debug register */
117 #define TR 18 /* test register */
118 #define I 19 /* immediate, unsigned */
119 #define Is 20 /* immediate, signed */
120 #define Ib 21 /* byte immediate, unsigned */
121 #define Ibs 22 /* byte immediate, signed */
122 #define Iw 23 /* word immediate, unsigned */
123 #define Il 24 /* long immediate */
124 #define O 25 /* direct address */
125 #define Db 26 /* byte displacement from EIP */
126 #define Dl 27 /* long displacement from EIP */
127 #define o1 28 /* constant 1 */
128 #define o3 29 /* constant 3 */
129 #define OS 30 /* immediate offset/segment */
130 #define ST 31 /* FP stack top */
131 #define STI 32 /* FP stack */
132 #define X 33 /* extended FP op */
133 #define XA 34 /* for 'fstcw %ax' */
134
135 struct inst {
136 char * i_name; /* name */
137 short i_has_modrm; /* has regmodrm byte */
138 short i_size; /* operand size */
139 int i_mode; /* addressing modes */
140 char * i_extra; /* pointer to extra opcode table */
141 };
142
143 #define op1(x) (x)
144 #define op2(x,y) ((x)|((y)<<8))
145 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
146
147 struct finst {
148 char * f_name; /* name for memory instruction */
149 int f_size; /* size for memory instruction */
150 int f_rrmode; /* mode for rr instruction */
151 char * f_rrname; /* name for rr instruction
152 (or pointer to table) */
153 };
154
155 static char * db_Grp6[] = {
156 "sldt",
157 "str",
158 "lldt",
159 "ltr",
160 "verr",
161 "verw",
162 "",
163 ""
164 };
165
166 static char * db_Grp7[] = {
167 "sgdt",
168 "sidt",
169 "lgdt",
170 "lidt",
171 "smsw",
172 "",
173 "lmsw",
174 "invlpg"
175 };
176
177 static char * db_Grp8[] = {
178 "",
179 "",
180 "",
181 "",
182 "bt",
183 "bts",
184 "btr",
185 "btc"
186 };
187
188 static struct inst db_inst_0f0x[] = {
189 /*00*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp6 },
190 /*01*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp7 },
191 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
192 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
193 /*04*/ { "", FALSE, NONE, 0, 0 },
194 /*05*/ { "", FALSE, NONE, 0, 0 },
195 /*06*/ { "clts", FALSE, NONE, 0, 0 },
196 /*07*/ { "", FALSE, NONE, 0, 0 },
197
198 /*08*/ { "invd", FALSE, NONE, 0, 0 },
199 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
200 /*0a*/ { "", FALSE, NONE, 0, 0 },
201 /*0b*/ { "", FALSE, NONE, 0, 0 },
202 /*0c*/ { "", FALSE, NONE, 0, 0 },
203 /*0d*/ { "", FALSE, NONE, 0, 0 },
204 /*0e*/ { "", FALSE, NONE, 0, 0 },
205 /*0f*/ { "", FALSE, NONE, 0, 0 },
206 };
207
208 static struct inst db_inst_0f2x[] = {
209 /*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */
210 /*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */
211 /*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 },
212 /*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 },
213 /*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 },
214 /*25*/ { "", FALSE, NONE, 0, 0 },
215 /*26*/ { "mov", TRUE, LONG, op2(E,TR), 0 },
216 /*27*/ { "", FALSE, NONE, 0, 0 },
217
218 /*28*/ { "", FALSE, NONE, 0, 0 },
219 /*29*/ { "", FALSE, NONE, 0, 0 },
220 /*2a*/ { "", FALSE, NONE, 0, 0 },
221 /*2b*/ { "", FALSE, NONE, 0, 0 },
222 /*2c*/ { "", FALSE, NONE, 0, 0 },
223 /*2d*/ { "", FALSE, NONE, 0, 0 },
224 /*2e*/ { "", FALSE, NONE, 0, 0 },
225 /*2f*/ { "", FALSE, NONE, 0, 0 },
226 };
227
228 static struct inst db_inst_0f8x[] = {
229 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
230 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
231 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
232 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
233 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
234 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
235 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
236 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
237
238 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
239 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
240 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
241 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
242 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
243 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
244 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
245 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
246 };
247
248 static struct inst db_inst_0f9x[] = {
249 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
250 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
251 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
252 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
253 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
254 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
255 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
256 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
257
258 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
259 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
260 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
261 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
262 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
263 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
264 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
265 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
266 };
267
268 static struct inst db_inst_0fax[] = {
269 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
270 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
271 /*a2*/ { "", FALSE, NONE, 0, 0 },
272 /*a3*/ { "bt", TRUE, LONG, op2(E,R), 0 },
273 /*a4*/ { "shld", TRUE, LONG, op3(Ib,E,R), 0 },
274 /*a5*/ { "shld", TRUE, LONG, op3(CL,E,R), 0 },
275 /*a6*/ { "", FALSE, NONE, 0, 0 },
276 /*a7*/ { "", FALSE, NONE, 0, 0 },
277
278 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
279 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
280 /*aa*/ { "", FALSE, NONE, 0, 0 },
281 /*ab*/ { "bts", TRUE, LONG, op2(E,R), 0 },
282 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 },
283 /*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 },
284 /*a6*/ { "", FALSE, NONE, 0, 0 },
285 /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 },
286 };
287
288 static struct inst db_inst_0fbx[] = {
289 /*b0*/ { "", FALSE, NONE, 0, 0 },
290 /*b1*/ { "", FALSE, NONE, 0, 0 },
291 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
292 /*b3*/ { "bts", TRUE, LONG, op2(R, E), 0 },
293 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
294 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
295 /*b6*/ { "movzb", TRUE, LONG, op2(E, R), 0 },
296 /*b7*/ { "movzw", TRUE, LONG, op2(E, R), 0 },
297
298 /*b8*/ { "", FALSE, NONE, 0, 0 },
299 /*b9*/ { "", FALSE, NONE, 0, 0 },
300 /*ba*/ { "", TRUE, LONG, op2(Is, E), (char *)db_Grp8 },
301 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
302 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
303 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
304 /*be*/ { "movsb", TRUE, LONG, op2(E, R), 0 },
305 /*bf*/ { "movsw", TRUE, LONG, op2(E, R), 0 },
306 };
307
308 static struct inst db_inst_0fcx[] = {
309 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
310 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
311 /*c2*/ { "", FALSE, NONE, 0, 0 },
312 /*c3*/ { "", FALSE, NONE, 0, 0 },
313 /*c4*/ { "", FALSE, NONE, 0, 0 },
314 /*c5*/ { "", FALSE, NONE, 0, 0 },
315 /*c6*/ { "", FALSE, NONE, 0, 0 },
316 /*c7*/ { "", FALSE, NONE, 0, 0 },
317 /*c8*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
318 /*c9*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
319 /*ca*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
320 /*cb*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
321 /*cc*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
322 /*cd*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
323 /*ce*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
324 /*cf*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
325 };
326
327 static struct inst db_inst_0fdx[] = {
328 /*c0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
329 /*c1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
330 /*c2*/ { "", FALSE, NONE, 0, 0 },
331 /*c3*/ { "", FALSE, NONE, 0, 0 },
332 /*c4*/ { "", FALSE, NONE, 0, 0 },
333 /*c5*/ { "", FALSE, NONE, 0, 0 },
334 /*c6*/ { "", FALSE, NONE, 0, 0 },
335 /*c7*/ { "", FALSE, NONE, 0, 0 },
336 /*c8*/ { "", FALSE, NONE, 0, 0 },
337 /*c9*/ { "", FALSE, NONE, 0, 0 },
338 /*ca*/ { "", FALSE, NONE, 0, 0 },
339 /*cb*/ { "", FALSE, NONE, 0, 0 },
340 /*cc*/ { "", FALSE, NONE, 0, 0 },
341 /*cd*/ { "", FALSE, NONE, 0, 0 },
342 /*ce*/ { "", FALSE, NONE, 0, 0 },
343 /*cf*/ { "", FALSE, NONE, 0, 0 },
344 };
345
346 static struct inst *db_inst_0f[] = {
347 db_inst_0f0x,
348 0,
349 db_inst_0f2x,
350 0,
351 0,
352 0,
353 0,
354 0,
355 db_inst_0f8x,
356 db_inst_0f9x,
357 db_inst_0fax,
358 db_inst_0fbx,
359 db_inst_0fcx,
360 db_inst_0fdx,
361 0,
362 0
363 };
364
365 static char * db_Esc92[] = {
366 "fnop", "", "", "", "", "", "", ""
367 };
368 static char * db_Esc93[] = {
369 "", "", "", "", "", "", "", ""
370 };
371 static char * db_Esc94[] = {
372 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
373 };
374 static char * db_Esc95[] = {
375 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
376 };
377 static char * db_Esc96[] = {
378 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
379 "fincstp"
380 };
381 static char * db_Esc97[] = {
382 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
383 };
384
385 static char * db_Esca4[] = {
386 "", "fucompp","", "", "", "", "", ""
387 };
388
389 static char * db_Escb4[] = {
390 "", "", "fnclex","fninit","", "", "", ""
391 };
392
393 static char * db_Esce3[] = {
394 "", "fcompp","", "", "", "", "", ""
395 };
396
397 static char * db_Escf4[] = {
398 "fnstsw","", "", "", "", "", "", ""
399 };
400
401 static struct finst db_Esc8[] = {
402 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
403 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
404 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
405 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
406 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
407 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
408 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
409 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
410 };
411
412 static struct finst db_Esc9[] = {
413 /*0*/ { "fld", SNGL, op1(STI), 0 },
414 /*1*/ { "", NONE, op1(STI), "fxch" },
415 /*2*/ { "fst", SNGL, op1(X), (char *)db_Esc92 },
416 /*3*/ { "fstp", SNGL, op1(X), (char *)db_Esc93 },
417 /*4*/ { "fldenv", NONE, op1(X), (char *)db_Esc94 },
418 /*5*/ { "fldcw", NONE, op1(X), (char *)db_Esc95 },
419 /*6*/ { "fnstenv",NONE, op1(X), (char *)db_Esc96 },
420 /*7*/ { "fnstcw", NONE, op1(X), (char *)db_Esc97 },
421 };
422
423 static struct finst db_Esca[] = {
424 /*0*/ { "fiadd", WORD, 0, 0 },
425 /*1*/ { "fimul", WORD, 0, 0 },
426 /*2*/ { "ficom", WORD, 0, 0 },
427 /*3*/ { "ficomp", WORD, 0, 0 },
428 /*4*/ { "fisub", WORD, op1(X), (char *)db_Esca4 },
429 /*5*/ { "fisubr", WORD, 0, 0 },
430 /*6*/ { "fidiv", WORD, 0, 0 },
431 /*7*/ { "fidivr", WORD, 0, 0 }
432 };
433
434 static struct finst db_Escb[] = {
435 /*0*/ { "fild", WORD, 0, 0 },
436 /*1*/ { "", NONE, 0, 0 },
437 /*2*/ { "fist", WORD, 0, 0 },
438 /*3*/ { "fistp", WORD, 0, 0 },
439 /*4*/ { "", WORD, op1(X), (char *)db_Escb4 },
440 /*5*/ { "fld", EXTR, 0, 0 },
441 /*6*/ { "", WORD, 0, 0 },
442 /*7*/ { "fstp", EXTR, 0, 0 },
443 };
444
445 static struct finst db_Escc[] = {
446 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
447 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
448 /*2*/ { "fcom", DBLR, op2(ST,STI), 0 },
449 /*3*/ { "fcomp", DBLR, op2(ST,STI), 0 },
450 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
451 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
452 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
453 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
454 };
455
456 static struct finst db_Escd[] = {
457 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
458 /*1*/ { "", NONE, 0, 0 },
459 /*2*/ { "fst", DBLR, op1(STI), 0 },
460 /*3*/ { "fstp", DBLR, op1(STI), 0 },
461 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
462 /*5*/ { "", NONE, op1(STI), "fucomp" },
463 /*6*/ { "fnsave", NONE, 0, 0 },
464 /*7*/ { "fnstsw", NONE, 0, 0 },
465 };
466
467 static struct finst db_Esce[] = {
468 /*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" },
469 /*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" },
470 /*2*/ { "ficom", LONG, 0, 0 },
471 /*3*/ { "ficomp", LONG, op1(X), (char *)db_Esce3 },
472 /*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" },
473 /*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" },
474 /*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" },
475 /*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" },
476 };
477
478 static struct finst db_Escf[] = {
479 /*0*/ { "fild", LONG, 0, 0 },
480 /*1*/ { "", LONG, 0, 0 },
481 /*2*/ { "fist", LONG, 0, 0 },
482 /*3*/ { "fistp", LONG, 0, 0 },
483 /*4*/ { "fbld", NONE, op1(XA), (char *)db_Escf4 },
484 /*5*/ { "fld", QUAD, 0, 0 },
485 /*6*/ { "fbstp", NONE, 0, 0 },
486 /*7*/ { "fstp", QUAD, 0, 0 },
487 };
488
489 static struct finst *db_Esc_inst[] = {
490 db_Esc8, db_Esc9, db_Esca, db_Escb,
491 db_Escc, db_Escd, db_Esce, db_Escf
492 };
493
494 static char * db_Grp1[] = {
495 "add",
496 "or",
497 "adc",
498 "sbb",
499 "and",
500 "sub",
501 "xor",
502 "cmp"
503 };
504
505 static char * db_Grp2[] = {
506 "rol",
507 "ror",
508 "rcl",
509 "rcr",
510 "shl",
511 "shr",
512 "shl",
513 "sar"
514 };
515
516 static struct inst db_Grp3[] = {
517 { "test", TRUE, NONE, op2(I,E), 0 },
518 { "test", TRUE, NONE, op2(I,E), 0 },
519 { "not", TRUE, NONE, op1(E), 0 },
520 { "neg", TRUE, NONE, op1(E), 0 },
521 { "mul", TRUE, NONE, op2(E,A), 0 },
522 { "imul", TRUE, NONE, op2(E,A), 0 },
523 { "div", TRUE, NONE, op2(E,A), 0 },
524 { "idiv", TRUE, NONE, op2(E,A), 0 },
525 };
526
527 static struct inst db_Grp4[] = {
528 { "inc", TRUE, BYTE, op1(E), 0 },
529 { "dec", TRUE, BYTE, op1(E), 0 },
530 { "", TRUE, NONE, 0, 0 },
531 { "", TRUE, NONE, 0, 0 },
532 { "", TRUE, NONE, 0, 0 },
533 { "", TRUE, NONE, 0, 0 },
534 { "", TRUE, NONE, 0, 0 },
535 { "", TRUE, NONE, 0, 0 }
536 };
537
538 static struct inst db_Grp5[] = {
539 { "inc", TRUE, LONG, op1(E), 0 },
540 { "dec", TRUE, LONG, op1(E), 0 },
541 { "call", TRUE, NONE, op1(Eind),0 },
542 { "lcall", TRUE, NONE, op1(Eind),0 },
543 { "jmp", TRUE, NONE, op1(Eind),0 },
544 { "ljmp", TRUE, NONE, op1(Eind),0 },
545 { "push", TRUE, LONG, op1(E), 0 },
546 { "", TRUE, NONE, 0, 0 }
547 };
548
549 static struct inst db_inst_table[256] = {
550 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
551 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
552 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
553 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
554 /*04*/ { "add", FALSE, BYTE, op2(Is, A), 0 },
555 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
556 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
557 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
558
559 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
560 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
561 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
562 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
563 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
564 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
565 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
566 /*0f*/ { "", FALSE, NONE, 0, 0 },
567
568 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
569 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
570 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
571 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
572 /*14*/ { "adc", FALSE, BYTE, op2(Is, A), 0 },
573 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
574 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
575 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
576
577 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
578 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
579 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
580 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
581 /*1c*/ { "sbb", FALSE, BYTE, op2(Is, A), 0 },
582 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
583 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
584 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
585
586 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
587 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
588 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
589 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
590 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
591 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
592 /*26*/ { "", FALSE, NONE, 0, 0 },
593 /*27*/ { "aaa", FALSE, NONE, 0, 0 },
594
595 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
596 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
597 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
598 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
599 /*2c*/ { "sub", FALSE, BYTE, op2(Is, A), 0 },
600 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
601 /*2e*/ { "", FALSE, NONE, 0, 0 },
602 /*2f*/ { "das", FALSE, NONE, 0, 0 },
603
604 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
605 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
606 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
607 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
608 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
609 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
610 /*36*/ { "", FALSE, NONE, 0, 0 },
611 /*37*/ { "daa", FALSE, NONE, 0, 0 },
612
613 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
614 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
615 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
616 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
617 /*3c*/ { "cmp", FALSE, BYTE, op2(Is, A), 0 },
618 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
619 /*3e*/ { "", FALSE, NONE, 0, 0 },
620 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
621
622 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
623 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
624 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
625 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
626 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
627 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
628 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
629 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
630
631 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
632 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
633 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
634 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
635 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
636 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
637 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
638 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
639
640 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
641 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
642 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
643 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
644 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
645 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
646 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
647 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
648
649 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
650 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
651 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
652 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
653 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
654 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
655 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
656 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
657
658 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
659 /*61*/ { "popa", FALSE, LONG, 0, 0 },
660 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
661 /*63*/ { "arpl", TRUE, NONE, op2(Ew,Rw), 0 },
662
663 /*64*/ { "", FALSE, NONE, 0, 0 },
664 /*65*/ { "", FALSE, NONE, 0, 0 },
665 /*66*/ { "", FALSE, NONE, 0, 0 },
666 /*67*/ { "", FALSE, NONE, 0, 0 },
667
668 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
669 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
670 /*6a*/ { "push", FALSE, LONG, op1(Ib), 0 },
671 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
672 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
673 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
674 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
675 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
676
677 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
678 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
679 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
680 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
681 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
682 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
683 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
684 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
685
686 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
687 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
688 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
689 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
690 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
691 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
692 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
693 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
694
695 /*80*/ { "", TRUE, BYTE, op2(I, E), (char *)db_Grp1 },
696 /*81*/ { "", TRUE, LONG, op2(I, E), (char *)db_Grp1 },
697 /*82*/ { "", TRUE, BYTE, op2(Is,E), (char *)db_Grp1 },
698 /*83*/ { "", TRUE, LONG, op2(Ibs,E), (char *)db_Grp1 },
699 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
700 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
701 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
702 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
703
704 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
705 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
706 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
707 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
708 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
709 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
710 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
711 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
712
713 /*90*/ { "nop", FALSE, NONE, 0, 0 },
714 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
715 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
716 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
717 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
718 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
719 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
720 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
721
722 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
723 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
724 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
725 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
726 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
727 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
728 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
729 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
730
731 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
732 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
733 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
734 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
735 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
736 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
737 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
738 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
739
740 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
741 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
742 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
743 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
744 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
745 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
746 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
747 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
748
749 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
750 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
751 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
752 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
753 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
754 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
755 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
756 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
757
758 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
759 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
760 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
761 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
762 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
763 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
764 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
765 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
766
767 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), (char *)db_Grp2 },
768 /*c1*/ { "", TRUE, LONG, op2(Ib, E), (char *)db_Grp2 },
769 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
770 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
771 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
772 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
773 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
774 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
775
776 /*c8*/ { "enter", FALSE, NONE, op2(Ib, Iw), 0 },
777 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
778 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
779 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
780 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
781 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
782 /*ce*/ { "into", FALSE, NONE, 0, 0 },
783 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
784
785 /*d0*/ { "", TRUE, BYTE, op2(o1, E), (char *)db_Grp2 },
786 /*d1*/ { "", TRUE, LONG, op2(o1, E), (char *)db_Grp2 },
787 /*d2*/ { "", TRUE, BYTE, op2(CL, E), (char *)db_Grp2 },
788 /*d3*/ { "", TRUE, LONG, op2(CL, E), (char *)db_Grp2 },
789 /*d4*/ { "aam", TRUE, NONE, 0, 0 },
790 /*d5*/ { "aad", TRUE, NONE, 0, 0 },
791 /*d6*/ { "", FALSE, NONE, 0, 0 },
792 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
793
794 /*d8*/ { "", TRUE, NONE, 0, (char *)db_Esc8 },
795 /*d9*/ { "", TRUE, NONE, 0, (char *)db_Esc9 },
796 /*da*/ { "", TRUE, NONE, 0, (char *)db_Esca },
797 /*db*/ { "", TRUE, NONE, 0, (char *)db_Escb },
798 /*dc*/ { "", TRUE, NONE, 0, (char *)db_Escc },
799 /*dd*/ { "", TRUE, NONE, 0, (char *)db_Escd },
800 /*de*/ { "", TRUE, NONE, 0, (char *)db_Esce },
801 /*df*/ { "", TRUE, NONE, 0, (char *)db_Escf },
802
803 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
804 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
805 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
806 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
807 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
808 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
809 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
810 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
811
812 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
813 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
814 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
815 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
816 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
817 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
818 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
819 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
820
821 /*f0*/ { "", FALSE, NONE, 0, 0 },
822 /*f1*/ { "", FALSE, NONE, 0, 0 },
823 /*f2*/ { "", FALSE, NONE, 0, 0 },
824 /*f3*/ { "", FALSE, NONE, 0, 0 },
825 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
826 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
827 /*f6*/ { "", TRUE, BYTE, 0, (char *)db_Grp3 },
828 /*f7*/ { "", TRUE, LONG, 0, (char *)db_Grp3 },
829
830 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
831 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
832 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
833 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
834 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
835 /*fd*/ { "std", FALSE, NONE, 0, 0 },
836 /*fe*/ { "", TRUE, NONE, 0, (char *)db_Grp4 },
837 /*ff*/ { "", TRUE, NONE, 0, (char *)db_Grp5 },
838 };
839
840 static struct inst db_bad_inst =
841 { "???", FALSE, NONE, 0, 0 }
842 ;
843
844 #define f_mod(byte) ((byte)>>6)
845 #define f_reg(byte) (((byte)>>3)&0x7)
846 #define f_rm(byte) ((byte)&0x7)
847
848 #define sib_ss(byte) ((byte)>>6)
849 #define sib_index(byte) (((byte)>>3)&0x7)
850 #define sib_base(byte) ((byte)&0x7)
851
852 struct i_addr {
853 int is_reg; /* if reg, reg number is in 'disp' */
854 int disp;
855 char * base;
856 char * index;
857 int ss;
858 };
859
860 static char * db_index_reg_16[8] = {
861 "%bx,%si",
862 "%bx,%di",
863 "%bp,%si",
864 "%bp,%di",
865 "%si",
866 "%di",
867 "%bp",
868 "%bx"
869 };
870
871 static char * db_reg[3][8] = {
872 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" },
873 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" },
874 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
875 };
876
877 static char * db_seg_reg[8] = {
878 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
879 };
880
881 /*
882 * lengths for size attributes
883 */
884 static int db_lengths[] = {
885 1, /* BYTE */
886 2, /* WORD */
887 4, /* LONG */
888 8, /* QUAD */
889 4, /* SNGL */
890 8, /* DBLR */
891 10, /* EXTR */
892 };
893
894 static unsigned int db_get_task_value(unsigned int loc, int size, int is_signed)
895 {
896 unsigned int result;
897 if (db_disasm_16) loc = (unsigned int)PTR_SEG_TO_LIN(loc);
898 switch(size)
899 {
900 case 4:
901 if (is_signed)
902 result = (unsigned int) *((int *) loc);
903 else
904 result = (unsigned int) *((unsigned int *) loc);
905 break;
906 case 2:
907 if (is_signed)
908 result = (unsigned int) *((short int *) loc);
909 else
910 result = *((unsigned short int *) loc);
911 break;
912 case 1:
913 if (is_signed)
914 result = (unsigned int) *((char *) loc);
915 else
916 result = *((unsigned char *) loc);
917 break;
918 default:
919 fprintf(stderr, "Illegal size specified\n");
920 result = 0;
921 break;
922 }
923 return result;
924 }
925
926 #define get_value_inc(result, loc, size, is_signed) \
927 result = db_get_task_value((loc), (size), (is_signed)); \
928 if (!db_disasm_16) (loc) += (size); \
929 else (loc) = ((loc) & 0xffff0000) | (((loc) + (size)) & 0xffff);
930
931 /*
932 * Read address at location and return updated location.
933 */
934 db_addr_t
935 db_read_address(loc, short_addr, regmodrm, addrp)
936 db_addr_t loc;
937 int short_addr;
938 int regmodrm;
939 struct i_addr *addrp; /* out */
940 {
941 int mod, rm, sib, index, disp;
942
943 mod = f_mod(regmodrm);
944 rm = f_rm(regmodrm);
945
946 if (mod == 3) {
947 addrp->is_reg = TRUE;
948 addrp->disp = rm;
949 return (loc);
950 }
951 addrp->is_reg = FALSE;
952 addrp->index = 0;
953
954 if (short_addr) {
955 addrp->index = 0;
956 addrp->ss = 0;
957 switch (mod) {
958 case 0:
959 if (rm == 6) {
960 get_value_inc(disp, loc, 2, TRUE);
961 addrp->disp = disp;
962 addrp->base = 0;
963 }
964 else {
965 addrp->disp = 0;
966 addrp->base = db_index_reg_16[rm];
967 }
968 break;
969 case 1:
970 get_value_inc(disp, loc, 1, TRUE);
971 addrp->disp = disp;
972 addrp->base = db_index_reg_16[rm];
973 break;
974 case 2:
975 get_value_inc(disp, loc, 2, TRUE);
976 addrp->disp = disp;
977 addrp->base = db_index_reg_16[rm];
978 break;
979 }
980 }
981 else {
982 if (mod != 3 && rm == 4) {
983 get_value_inc(sib, loc, 1, FALSE);
984 rm = sib_base(sib);
985 index = sib_index(sib);
986 if (index != 4)
987 addrp->index = db_reg[LONG][index];
988 addrp->ss = sib_ss(sib);
989 }
990
991 switch (mod) {
992 case 0:
993 if (rm == 5) {
994 get_value_inc(addrp->disp, loc, 4, FALSE);
995 addrp->base = 0;
996 }
997 else {
998 addrp->disp = 0;
999 addrp->base = db_reg[LONG][rm];
1000 }
1001 break;
1002
1003 case 1:
1004 get_value_inc(disp, loc, 1, TRUE);
1005 addrp->disp = disp;
1006 addrp->base = db_reg[LONG][rm];
1007 break;
1008
1009 case 2:
1010 get_value_inc(disp, loc, 4, FALSE);
1011 addrp->disp = disp;
1012 addrp->base = db_reg[LONG][rm];
1013 break;
1014 }
1015 }
1016 return (loc);
1017 }
1018
1019 static void db_task_printsym(unsigned int addr, int size)
1020 {
1021 switch(size)
1022 {
1023 case BYTE:
1024 fprintf(stderr, "0x%2.2x", addr & 0xff );
1025 break;
1026 case WORD:
1027 fprintf(stderr, "0x%4.4x", addr & 0xffff );
1028 break;
1029 case LONG:
1030 print_address(addr, stderr, db_disasm_16 ? 16 : 32);
1031 break;
1032 }
1033 }
1034
1035 void
1036 db_print_address(seg, size, addrp)
1037 char * seg;
1038 int size;
1039 struct i_addr *addrp;
1040 {
1041 if (addrp->is_reg) {
1042 fprintf(stderr,"%s", db_reg[size][addrp->disp]);
1043 return;
1044 }
1045
1046 if (seg) {
1047 fprintf(stderr,"%s:", seg);
1048 }
1049
1050 if (addrp->base != 0 || addrp->index != 0) {
1051 fprintf(stderr,"0x%x", addrp->disp);
1052 fprintf(stderr,"(");
1053 if (addrp->base)
1054 fprintf(stderr,"%s", addrp->base);
1055 if (addrp->index)
1056 fprintf(stderr,",%s,%d", addrp->index, 1<<addrp->ss);
1057 fprintf(stderr,")");
1058 } else
1059 db_task_printsym((db_addr_t)addrp->disp, size);
1060 }
1061
1062 /*
1063 * Disassemble floating-point ("escape") instruction
1064 * and return updated location.
1065 */
1066 db_addr_t
1067 db_disasm_esc(loc, inst, short_addr, size, seg)
1068 db_addr_t loc;
1069 int inst;
1070 int short_addr;
1071 int size;
1072 char * seg;
1073 {
1074 int regmodrm;
1075 struct finst *fp;
1076 int mod;
1077 struct i_addr address;
1078 char * name;
1079
1080 get_value_inc(regmodrm, loc, 1, FALSE);
1081 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1082 mod = f_mod(regmodrm);
1083 if (mod != 3) {
1084 /*
1085 * Normal address modes.
1086 */
1087 loc = db_read_address(loc, short_addr, regmodrm, &address);
1088 fprintf(stderr,fp->f_name);
1089 switch(fp->f_size) {
1090 case SNGL:
1091 fprintf(stderr,"s");
1092 break;
1093 case DBLR:
1094 fprintf(stderr,"l");
1095 break;
1096 case EXTR:
1097 fprintf(stderr,"t");
1098 break;
1099 case WORD:
1100 fprintf(stderr,"s");
1101 break;
1102 case LONG:
1103 fprintf(stderr,"l");
1104 break;
1105 case QUAD:
1106 fprintf(stderr,"q");
1107 break;
1108 default:
1109 break;
1110 }
1111 fprintf(stderr,"\t");
1112 db_print_address(seg, BYTE, &address);
1113 }
1114 else {
1115 /*
1116 * 'reg-reg' - special formats
1117 */
1118 switch (fp->f_rrmode) {
1119 case op2(ST,STI):
1120 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1121 fprintf(stderr,"%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1122 break;
1123 case op2(STI,ST):
1124 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1125 fprintf(stderr,"%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1126 break;
1127 case op1(STI):
1128 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1129 fprintf(stderr,"%s\t%%st(%d)",name, f_rm(regmodrm));
1130 break;
1131 case op1(X):
1132 fprintf(stderr,"%s", ((char **)fp->f_rrname)[f_rm(regmodrm)]);
1133 break;
1134 case op1(XA):
1135 fprintf(stderr,"%s\t%%ax",
1136 ((char **)fp->f_rrname)[f_rm(regmodrm)]);
1137 break;
1138 default:
1139 fprintf(stderr,"<bad instruction>");
1140 break;
1141 }
1142 }
1143
1144 return (loc);
1145 }
1146
1147 /*
1148 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1149 * (optional) alternate format. Return address of start of
1150 * next instruction.
1151 */
1152 db_addr_t
1153 db_disasm(loc, altfmt, flag16)
1154 db_addr_t loc;
1155 boolean_t altfmt;
1156 boolean_t flag16;
1157 {
1158 int inst;
1159 int size;
1160 int short_addr;
1161 char * seg;
1162 struct inst * ip;
1163 char * i_name;
1164 int i_size;
1165 int i_mode;
1166 int regmodrm;
1167 boolean_t first;
1168 int displ;
1169 int prefix;
1170 int imm;
1171 int imm2;
1172 int len;
1173 struct i_addr address;
1174
1175 db_disasm_16 = flag16;
1176
1177 get_value_inc(inst, loc, 1, FALSE);
1178
1179 if (db_disasm_16) {
1180 short_addr = TRUE;
1181 size = WORD;
1182 }
1183 else {
1184 short_addr = FALSE;
1185 size = LONG;
1186 }
1187 seg = 0;
1188
1189 /*
1190 * Get prefixes
1191 */
1192 prefix = TRUE;
1193 do {
1194 switch (inst) {
1195 case 0x66: /* data16 */
1196 if (size == LONG)
1197 size = WORD;
1198 else
1199 size = LONG;
1200 break;
1201 case 0x67:
1202 short_addr = !short_addr;
1203 break;
1204 case 0x26:
1205 seg = "%es";
1206 break;
1207 case 0x36:
1208 seg = "%ss";
1209 break;
1210 case 0x2e:
1211 seg = "%cs";
1212 break;
1213 case 0x3e:
1214 seg = "%ds";
1215 break;
1216 case 0x64:
1217 seg = "%fs";
1218 break;
1219 case 0x65:
1220 seg = "%gs";
1221 break;
1222 case 0xf0:
1223 fprintf(stderr,"lock ");
1224 break;
1225 case 0xf2:
1226 fprintf(stderr,"repne ");
1227 break;
1228 case 0xf3:
1229 fprintf(stderr,"repe "); /* XXX repe VS rep */
1230 break;
1231 default:
1232 prefix = FALSE;
1233 break;
1234 }
1235 if (prefix) {
1236 get_value_inc(inst, loc, 1, FALSE);
1237 }
1238 } while (prefix);
1239
1240 if (inst >= 0xd8 && inst <= 0xdf) {
1241 loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1242 fprintf(stderr,"\n");
1243 return (loc);
1244 }
1245
1246 if (inst == 0x0f) {
1247 get_value_inc(inst, loc, 1, FALSE);
1248 ip = db_inst_0f[inst>>4];
1249 if (ip == 0) {
1250 ip = &db_bad_inst;
1251 }
1252 else {
1253 ip = &ip[inst&0xf];
1254 }
1255 }
1256 else
1257 ip = &db_inst_table[inst];
1258
1259 if (ip->i_has_modrm) {
1260 get_value_inc(regmodrm, loc, 1, FALSE);
1261 loc = db_read_address(loc, short_addr, regmodrm, &address);
1262 }
1263
1264 i_name = ip->i_name;
1265 i_size = ip->i_size;
1266 i_mode = ip->i_mode;
1267
1268 if (ip->i_extra == (char *)db_Grp1 ||
1269 ip->i_extra == (char *)db_Grp2 ||
1270 ip->i_extra == (char *)db_Grp6 ||
1271 ip->i_extra == (char *)db_Grp7 ||
1272 ip->i_extra == (char *)db_Grp8) {
1273 i_name = ((char **)ip->i_extra)[f_reg(regmodrm)];
1274 }
1275 else if (ip->i_extra == (char *)db_Grp3) {
1276 ip = (struct inst *)ip->i_extra;
1277 ip = &ip[f_reg(regmodrm)];
1278 i_name = ip->i_name;
1279 i_mode = ip->i_mode;
1280 }
1281 else if (ip->i_extra == (char *)db_Grp4 ||
1282 ip->i_extra == (char *)db_Grp5) {
1283 ip = (struct inst *)ip->i_extra;
1284 ip = &ip[f_reg(regmodrm)];
1285 i_name = ip->i_name;
1286 i_mode = ip->i_mode;
1287 i_size = ip->i_size;
1288 }
1289
1290 if (i_size == SDEP) {
1291 if (size == WORD)
1292 fprintf(stderr,i_name);
1293 else
1294 fprintf(stderr,ip->i_extra);
1295 }
1296 else {
1297 fprintf(stderr,i_name);
1298 if (i_size != NONE) {
1299 if (i_size == BYTE) {
1300 fprintf(stderr,"b");
1301 size = BYTE;
1302 }
1303 else if (i_size == WORD) {
1304 fprintf(stderr,"w");
1305 size = WORD;
1306 }
1307 else if (size == WORD)
1308 fprintf(stderr,"w");
1309 else
1310 fprintf(stderr,"l");
1311 }
1312 }
1313 fprintf(stderr,"\t");
1314 for (first = TRUE;
1315 i_mode != 0;
1316 i_mode >>= 8, first = FALSE)
1317 {
1318 if (!first)
1319 fprintf(stderr,",");
1320
1321 switch (i_mode & 0xFF) {
1322
1323 case E:
1324 db_print_address(seg, size, &address);
1325 break;
1326
1327 case Eind:
1328 fprintf(stderr,"*");
1329 db_print_address(seg, size, &address);
1330 break;
1331
1332 case Ew:
1333 db_print_address(seg, WORD, &address);
1334 break;
1335
1336 case Eb:
1337 db_print_address(seg, BYTE, &address);
1338 break;
1339
1340 case R:
1341 fprintf(stderr,"%s", db_reg[size][f_reg(regmodrm)]);
1342 break;
1343
1344 case Rw:
1345 fprintf(stderr,"%s", db_reg[WORD][f_reg(regmodrm)]);
1346 break;
1347
1348 case Ri:
1349 fprintf(stderr,"%s", db_reg[size][f_rm(inst)]);
1350 break;
1351
1352 case S:
1353 fprintf(stderr,"%s", db_seg_reg[f_reg(regmodrm)]);
1354 break;
1355
1356 case Si:
1357 fprintf(stderr,"%s", db_seg_reg[f_reg(inst)]);
1358 break;
1359
1360 case A:
1361 fprintf(stderr,"%s", db_reg[size][0]); /* acc */
1362 break;
1363
1364 case BX:
1365 if (seg)
1366 fprintf(stderr,"%s:", seg);
1367 fprintf(stderr,"(%s)", short_addr ? "%bx" : "%ebx");
1368 break;
1369
1370 case CL:
1371 fprintf(stderr,"%%cl");
1372 break;
1373
1374 case DX:
1375 fprintf(stderr,"%%dx");
1376 break;
1377
1378 case SI:
1379 if (seg)
1380 fprintf(stderr,"%s:", seg);
1381 fprintf(stderr,"(%s)", short_addr ? "%si" : "%esi");
1382 break;
1383
1384 case DI:
1385 fprintf(stderr,"%%es:(%s)", short_addr ? "%di" : "%edi");
1386 break;
1387
1388 case CR:
1389 fprintf(stderr,"%%cr%d", f_reg(regmodrm));
1390 break;
1391
1392 case DR:
1393 fprintf(stderr,"%%dr%d", f_reg(regmodrm));
1394 break;
1395
1396 case TR:
1397 fprintf(stderr,"%%tr%d", f_reg(regmodrm));
1398 break;
1399
1400 case I:
1401 len = db_lengths[size];
1402 get_value_inc(imm, loc, len, FALSE);/* unsigned */
1403 fprintf(stderr,"$0x%x", imm);
1404 break;
1405
1406 case Is:
1407 len = db_lengths[size];
1408 get_value_inc(imm, loc, len, TRUE); /* signed */
1409 fprintf(stderr,"$%d", imm);
1410 break;
1411
1412 case Ib:
1413 get_value_inc(imm, loc, 1, FALSE); /* unsigned */
1414 fprintf(stderr,"$0x%x", imm);
1415 break;
1416
1417 case Ibs:
1418 get_value_inc(imm, loc, 1, TRUE); /* signed */
1419 fprintf(stderr,"$%d", imm);
1420 break;
1421
1422 case Iw:
1423 get_value_inc(imm, loc, 2, FALSE); /* unsigned */
1424 fprintf(stderr,"$0x%x", imm);
1425 break;
1426
1427 case Il:
1428 get_value_inc(imm, loc, 4, FALSE);
1429 fprintf(stderr,"$0x%x", imm);
1430 break;
1431
1432 case O:
1433 if (short_addr) {
1434 get_value_inc(displ, loc, 2, TRUE);
1435 }
1436 else {
1437 get_value_inc(displ, loc, 4, TRUE);
1438 }
1439 if (seg)
1440 fprintf(stderr,"%s:%d",seg, displ);
1441 else
1442 db_task_printsym((db_addr_t)displ,
1443 short_addr ? WORD : LONG);
1444 break;
1445
1446 case Db:
1447 get_value_inc(displ, loc, 1, TRUE);
1448 if (short_addr) {
1449 /* offset only affects low 16 bits */
1450 displ = (loc & 0xffff0000)
1451 | ((loc + displ) & 0xffff);
1452 }
1453 else
1454 displ = displ + loc;
1455 db_task_printsym((db_addr_t)displ,
1456 short_addr ? WORD : LONG);
1457 break;
1458
1459 case Dl:
1460 if (short_addr) {
1461 get_value_inc(displ, loc, 2, TRUE);
1462 /* offset only affects low 16 bits */
1463 displ = (loc & 0xffff0000)
1464 | ((loc + displ) & 0xffff);
1465 }
1466 else {
1467 get_value_inc(displ, loc, 4, TRUE);
1468 displ = displ + loc;
1469 }
1470 db_task_printsym((db_addr_t)displ,
1471 short_addr ? WORD : LONG);
1472 break;
1473
1474 case o1:
1475 fprintf(stderr,"$1");
1476 break;
1477
1478 case o3:
1479 fprintf(stderr,"$3");
1480 break;
1481
1482 case OS:
1483 if (short_addr) {
1484 get_value_inc(imm, loc, 2, FALSE); /* offset */
1485 }
1486 else {
1487 get_value_inc(imm, loc, 4, FALSE); /* offset */
1488 }
1489 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1490 if (short_addr)
1491 print_address( (imm2 << 16) | imm, stderr, 16 );
1492 else
1493 fprintf(stderr,"$0x%x,0x%08x", imm2, imm);
1494 break;
1495 }
1496 }
1497
1498 if (altfmt == 0 && !db_disasm_16) {
1499 if (inst == 0xe9 || inst == 0xeb) {
1500 /*
1501 * GAS pads to longword boundary after unconditional jumps.
1502 */
1503 #if 0
1504 loc = (loc + (4-1)) & ~(4-1);
1505 #endif
1506 }
1507 }
1508 return (loc);
1509 }
1510
Windows API implementation