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